HK1248792B - Valve and coupling - Google Patents

Description

Valves and fittings

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims the benefit of U.S. Provisional Application No. 62/340,090, filed on May 23, 2016, and U.S. Provisional Application No. 62/220,290, filed on September 18, 2015, both of which are incorporated herein by reference.

Technical Field

The present invention relates to valves and mechanical couplings.

Background Art

Mechanical couplings for joining pipe elements together end-to-end include interconnectable segments that can be positioned circumferentially around the ends of coaxially aligned pipe elements. The term "pipe element" is used herein to describe any tubular article or component having a tubular form. Pipe elements include pipe stock, pipe fittings (e.g., elbows, caps, and T-pieces), and fluid control components (e.g., valves, reducers, filters, flow restrictors, pressure regulators, etc.).

Each mechanical coupling segment comprises a housing having projections that extend inwardly from the housing and, for example, engage the outer surface of a pipe element of various configurations, including, for example, a pipe element having circumferential grooves. The engagement between the projections and the pipe element provides mechanical constraint to the joint and ensures that the pipe elements remain coupled even under high internal pressures and external forces. The housing defines an annular channel or pocket that receives an annular gasket or seal, typically an elastomeric ring, that engages the end of each pipe element and cooperates with the segment and pipe element to provide a fluid-tight seal. The segment has a connecting member, typically in the form of a lug that protrudes outwardly from the housing. The lug is adapted to receive fasteners, such as nuts and bolts, that are adjustably tightened to pull the segments toward each other.

Mechanical couplings according to the prior art have continuous arcuate protrusions on segments that engage the outer surfaces of the pipe elements being joined end-to-end. These arcuate protrusions are part of the segment structure and are often referred to as the "keys" of the coupling. The keys can engage the outer surfaces of the pipe elements in a variety of configurations, including, for example, pipe elements having circumferential grooves.

The curved protrusions on prior art couplings typically have a curved surface with a radius of curvature that substantially matches the radius of curvature of the outer surface of the pipe element with which it is intended to engage. For couplings for grooved pipe elements, the radius of curvature of the curved surface is smaller than the radius of curvature of the outer surface of the pipe element outside the groove so that the protrusion fits within and engages the groove.

The method of fixing pipe elements in an end-to-end relationship includes a sequential installation process when using mechanical couplings according to the prior art. Typically, a technician receives the coupling with the segments bolted together and the annular gasket captured within the segments' channels. The technician first disassembles the coupling by unbolting the bolts, removes the annular gasket, lubricates it (if not pre-lubricated), and places it around the ends of the pipe elements to be connected. Installing the annular gasket often requires it to be lubricated and stretched to accommodate the pipe elements. With the annular gasket in place on both pipe elements, the segments are then placed one at a time across the ends of the pipe elements and against them to capture the annular gasket. During placement, the segments engage the gaskets, the protrusions align with the grooves, the bolts are inserted through the lugs, and the nuts are screwed onto the bolts and tightened, thereby pulling the coupling segments toward each other, compressing the gasket, and causing the protrusions to engage within the grooves.

As will be apparent from the foregoing description, installing a mechanical pipe coupling according to the prior art typically requires a technician to handle at least seven separate parts (and more when the coupling has more than two segments) and to completely disassemble and reassemble the coupling. If a technician could install a mechanical pipe coupling without first having to disassemble it entirely and then reassemble it piece by piece, significant time, labor, and expense could be saved.

Furthermore, when the valve is positioned inline, two couplings are required, one on the valve inlet side and one on the valve exhaust side. It would be advantageous to combine the functionality of the valve and couplings to improve installation efficiency.

Summary of the Invention

The present invention relates to a valve. In an exemplary embodiment, the valve includes a plurality of segments attached end-to-end surrounding a central space. Each segment has first and second circumferentially arranged protrusions extending toward the central space. A valve body is positioned within the central space. The valve body has an outer surface facing the segment and an inner surface defining a hole through it. The first and second circumferentially arranged protrusions are engageable with the outer surface for securing the valve body within the central space. A closing member is positioned within the hole. The closing member is movable between open and closed configurations. A rod is attached to the closing member for moving the closing member between open and closed configurations. First and second connecting members are positioned at opposite ends of at least two of the segments for achieving end-to-end attachment of the segments.

By way of example, the bushing overlies the inner surface of the valve body and surrounds the aperture. When in the closed configuration, the bushing sealingly engages the closure member. In another example, the bushing further includes a ring having first and second lobes positioned on opposite sides thereof. A portion of the first lobe surrounds a first portion of the outer surface of the valve body. The first protrusion engages the first portion of the first lobe. A portion of the second lobe surrounds a second portion of the outer surface of the valve body. The second protrusion engages the second portion of the second lobe.

By way of example, each segment includes a channel extending circumferentially around a central space and facing the central space. Each channel is defined by first and second side surfaces located on opposite sides of the segment and a back surface extending between the side surfaces. The first lobe has a first lobe surface facing the first side surface, and the second lobe has a second lobe surface facing the second side surface. In this exemplary embodiment, when the lobe is seated in the channel, at least a portion of the first and second lobe surfaces contact the first and second side surfaces, respectively, causing the lobe to deform toward the center of the channel.

In a specific example, when the lobe is undeformed, the first lobe surface is angularly oriented relative to the first side surface, and the second lobe surface is angularly oriented relative to the second side surface. By way of example, when the lobe is undeformed, the first and second lobe surfaces comprise convexly curved surfaces.

In an exemplary embodiment, each segment includes a channel extending circumferentially around and facing a central space. Each channel is defined by first and second side surfaces located on opposite sides of the segment and a back surface extending between the side surfaces. A shroud is positioned between the valve body and the segment. The shroud includes a ring having first and second lobes positioned on opposite sides thereof. The first lobe has a first lobe surface facing the first side surface, and the second lobe has a second lobe surface facing the second side surface. The first protrusion engages the first lobe, and the second protrusion engages the second lobe. When the shroud is seated within the channel, at least a portion of the first and second lobe surfaces contact the first and second side surfaces, respectively, causing the lobes to deform toward the center of the channel.

In an exemplary embodiment, when the lobe is undeformed, the first lobe surface is angularly oriented relative to the first side surface, and the second lobe surface is angularly oriented relative to the second side surface. By way of example, when the lobe is undeformed, the first and second lobe surfaces comprise convexly curved surfaces. In an exemplary embodiment, a portion of the bushing extends between the valve body and the first and second segments. The shroud sealingly engages the portion of the bushing.

A specific exemplary embodiment includes only two of the segments. In an exemplary embodiment, the closure member comprises a disc rotatably mounted within the valve body. By way of example, each segment further comprises first and second keys positioned on opposite sides of the segment. Each key extends circumferentially around the central space and projects toward the central space. In another example, each key comprises an arcuate surface engageable with a pipe element positioned within the central space.

In an exemplary embodiment, the first support body is positioned adjacent to the first connecting member. The first support body has a surface facing the valve body and first and second columns extending away from the central space in a spaced-apart relationship. The first column engages the first segment and the second column engages the second segment. The second support body is positioned adjacent to the second connecting member. The second support body has a surface facing the valve body and first and second columns extending away from the central space in a spaced-apart relationship. The first column of the second support body engages the first segment and the second column of the second support body engages the second segment. The surfaces of the first and second support bodies engage the bushing and the columns engage the segments, whereby the first and second support bodies cooperate with the bushing to support the first and second segments in a spaced-apart relationship in a pre-assembled configuration.

By way of example, the first and second support bodies include a plurality of teeth protruding toward the central space. The teeth are arranged on opposite sides of the valve body for engaging the tubular element positioned within the central space when the connecting member is adjustably tightened to pull the segments toward each other. The exemplary embodiment further includes first and second springs positioned adjacent opposite ends of the first support body. The first spring is positioned between the valve body and the first segment, and the second spring is positioned between the valve body and the second segment. The third and fourth springs are positioned adjacent opposite ends of the second support body. The third spring is positioned between the valve body and the first segment, and the fourth spring is positioned between the valve body and the second segment. Further by way of example, the first and second springs are attached to the first support body, and the third and fourth springs are attached to the second support body.

Another exemplary valve further includes a circumferential ridge extending around the valve body. Springs act between the circumferential ridge and the first and second segments. By way of example, each spring has a "W" cross-sectional shape including an apex positioned between first and second legs on opposite sides of the apex. For each spring, the apex receives the circumferential ridge. The legs of the first and third springs engage the first segment, and the legs of the second and fourth springs engage the second segment.

In another exemplary embodiment, a first support body is positioned adjacent to the first connecting member. The first support body has a surface facing the valve body and a boss extending away from the central space. The boss engages the first and second segments. A second support body is positioned adjacent to the second connecting member. The second support body has a surface facing the valve body and a second boss extending away from the central space. The second boss engages the first and second segments. The surfaces of the first and second support bodies engage the bushing; the bosses engage the segments, whereby in a preassembled configuration, the first and second support bodies cooperate with the bushing to support the first and second segments in a spaced-apart relationship.

By way of example, the first and second support bodies include a plurality of teeth projecting toward the central space. The teeth are provided on opposite sides of the valve body for engaging a pipe element positioned within the central space when the connecting member is adjustably tightened to pull the segments toward each other.

The exemplary embodiment further includes first and second springs positioned adjacent to opposite ends of the first support body. The first spring is positioned between the valve body and the first segment, and the second spring is positioned between the valve body and the second segment. The third and fourth springs are positioned adjacent to opposite ends of the second support body. The third spring is positioned between the valve body and the first segment, and the fourth spring is positioned between the valve body and the second segment. By way of example, the first and second springs are attached to the first support body, and the third and fourth springs are attached to the second support body.

In another exemplary valve, a circumferential ridge extends around the valve body. Springs act between the circumferential ridge and the first and second segments. By way of example, each spring has a "W" cross-sectional shape including an apex positioned between first and second legs on opposite sides of the apex. For each spring, the apex receives the circumferential ridge, the legs of the first and third springs engage the first segment, and the legs of the second and fourth springs engage the second segment.

In an exemplary embodiment, a first fastener extends between a protrusion of the first support body and the valve body. A second fastener extends between a protrusion of the second support body and the valve body. In this example, the fasteners attach the first and second support bodies to the valve body. By way of example, a first spring acts between the valve body and the protrusion of the first support body. A second spring acts between the protrusion of the valve body and the second support body, the first and second springs respectively biasing the first and second support bodies away from the valve body. In a specific exemplary embodiment, the protrusion is circumferentially continuous. In another exemplary embodiment, the protrusion is circumferentially discontinuous.

The present invention also includes an exemplary valve comprising a plurality of segments attached end-to-end surrounding a central space. A valve body is positioned within the central space. The valve body has an outer surface facing the segments and an inner surface defining a hole therethrough. A closing member is positioned within the hole. The closing member is movable between an open and a closed configuration. A bushing overlaps the inner surface of the valve body and surrounds the hole. When in the closed configuration, the bushing sealingly engages the closing member. A rod is attached to the closing member for moving the closing member between an open and a closed configuration. A first and a second connecting member are positioned at opposite ends of at least two of the segments for achieving end-to-end attachment of the segments.

By way of example, each segment includes first and second circumferentially disposed protrusions extending toward the central space. The first and second circumferentially disposed protrusions are engageable with an outer surface of the valve body for securing the valve body within the central space. In an exemplary embodiment, the bushing further includes a ring having first and second lobes positioned on opposite sides thereof. A portion of the first lobe surrounds a first portion of the outer surface of the valve body. The first protrusion engages a first portion of the first lobe. A portion of the second lobe surrounds a second portion of the outer surface of the valve body. The second protrusion engages a second portion of the second lobe.

In an exemplary embodiment, each segment includes a channel extending circumferentially around and facing a central space. Each channel is defined by first and second side surfaces located on opposite sides of the segment and a back surface extending between the side surfaces. The first lobe has a first lobe surface facing the first side surface, and the second lobe has a second lobe surface facing the second side surface. When the lobe is seated within the channel, at least a portion of the first and second lobe surfaces contact the first and second side surfaces, respectively, causing the lobe to deform toward the center of the channel.

In an exemplary embodiment, when the lobe is undeformed, the first lobe surface is angularly oriented relative to the first side surface, and the second lobe surface is angularly oriented relative to the second side surface. In a specific exemplary embodiment, when the lobe is undeformed, the first and second lobe surfaces comprise convexly curved surfaces.

Further by way of example, each segment includes a channel extending circumferentially around and facing the central space. Each channel is defined by first and second side surfaces located on opposite sides of the segment and a back surface extending between the side surfaces. The shroud is positioned between the valve body and the segment. The shroud includes a ring having first and second lobes positioned on opposite sides thereof. The first lobe has a first lobe surface facing the first side surface, and the second lobe has a second lobe surface facing the second side surface. The first protrusion engages the first lobe, and the second protrusion engages the second lobe. When the shroud is seated within the channel, at least a portion of the first and second lobe surfaces contact the first and second side surfaces, respectively, causing the lobes to deform toward the center of the channel.

In a specific exemplary embodiment, when the lobe is undeformed, the first lobe surface is oriented at an angle relative to the first side surface, and the second lobe surface is oriented at an angle relative to the second side surface. By way of further example, when the lobe is undeformed, the first and second lobe surfaces comprise convexly curved surfaces. In an exemplary embodiment, a portion of the bushing extends between the valve body and the first and second segments. The shield sealingly engages the portion of the bushing. A specific exemplary embodiment includes only two of the segments. Further by way of example, the closure member comprises a disc rotatably mounted within the valve body.

In an exemplary embodiment, each segment includes first and second keys positioned on opposite sides of the segment. Each key extends circumferentially around a central space and projects toward the central space. By way of example, each key includes an arcuate surface engageable with a pipe element positioned within the central space.

The exemplary embodiment further includes a first support body positioned adjacent to the first connecting member. The first support body has a surface facing the valve body and first and second columns extending away from the central space in a spaced-apart relationship. The first column engages the first segment and the second column engages the second segment. The second support body is positioned adjacent to the second connecting member. The second support body has a surface facing the valve body and first and second columns extending away from the central space in a spaced-apart relationship. The first column of the second support body engages the first segment and the second column of the second support body engages the second segment. In a preassembled configuration, the first and second support bodies cooperate with the bushing to support the first and second segments in a spaced-apart relationship.

In an exemplary embodiment, the first and second support bodies include a plurality of teeth protruding toward the central space. The teeth are arranged on opposite sides of the valve body for engaging the tubular element positioned within the central space when the connecting member is adjustably tightened to pull the segments toward each other. By way of example, the valve further includes: first and second springs positioned adjacent opposite ends of the first support body. The first spring is positioned between the valve body and the first segment. The second spring is positioned between the valve body and the second segment. The third and fourth springs are positioned adjacent opposite ends of the second support body. The third spring is positioned between the valve body and the first segment, and the fourth spring is positioned between the valve body and the second segment. In the example, the first and second springs are attached to the first support body, and the third and fourth springs are attached to the second support body.

The exemplary embodiment further includes a circumferential ridge extending around the valve body. The springs act between the circumferential ridge and the first and second segments. In the exemplary embodiment, each spring has a "W" cross-sectional shape including an apex positioned between first and second legs on opposite sides of the apex. For each spring, the apex receives the circumferential ridge. The legs of the first and third springs engage the first segment, and the legs of the second and fourth springs engage the second segment.

The exemplary valve embodiment further includes a first support body positioned adjacent to the first connecting member. The first support body has a surface facing the valve body and a protrusion extending away from the central space. The protrusion engages the first and second segments. A second support body is positioned adjacent to the second connecting member. The second support body has a surface facing the valve body and a second protrusion extending away from the central space. The second protrusion engages the first and second segments. In a preassembled configuration, the first and second bodies cooperate with the bushing to support the first and second segments in a spaced-apart relationship.

In an exemplary embodiment, the first and second support bodies include a plurality of teeth projecting toward the central space. The teeth are disposed on opposite sides of the valve body for engaging a pipe element positioned within the central space when the connecting member is adjustably tightened to pull the segments toward each other.

The exemplary embodiment further includes first and second springs positioned adjacent to opposite ends of the first support body. The first spring is positioned between the valve body and the first segment, and the second spring is positioned between the valve body and the second segment. The third and fourth springs are positioned adjacent to opposite ends of the second support body. The third spring is positioned between the valve body and the first segment, and the fourth spring is positioned between the valve body and the second segment. By way of example, the first and second springs are attached to the first support body, and the third and fourth springs are attached to the second support body.

The exemplary valve further includes a circumferential ridge extending around the valve body. A spring acts between the circumferential ridge and the first and second segments. By way of further example, each spring has a "W" cross-sectional shape including an apex positioned between first and second legs on opposite sides of the apex. For each spring, the apex receives the circumferential ridge, the legs of the first and third springs engage the first segment, and the legs of the second and fourth springs engage the second segment. In an exemplary embodiment, a first fastener extends between a protrusion of the first support body and the valve body, and a second fastener extends between a protrusion of the second support body and the valve body. The fasteners attach the first and second bodies to the valve body. The exemplary embodiment further includes a first spring acting between the valve body and the protrusion of the first support body. A second spring acts between the protrusions of the valve body and the second support body. The first and second springs bias the first and second support bodies, respectively, away from the valve body. In an exemplary embodiment, the protrusion is continuous circumferentially. In another exemplary embodiment, the protrusion is discontinuous circumferentially.

The present invention further includes a seal for a valve having a valve closure member. In an exemplary embodiment, the seal includes a ring having an inner surface surrounding a hole. The inner surface is sealingly engageable with the valve closure member. First and second lobes are positioned on opposite sides of the ring. The lobes extend circumferentially around the ring and project in opposite directions along an axis coaxial with the hole. By way of example, each lobe includes a band having a first edge attached to the ring and a second, oppositely arranged edge including a sealing surface facing the axis. In an exemplary embodiment, each band has an arcuate cross-sectional shape. By way of further example, each band is oriented at an angle relative to the axis.

Another exemplary seal includes a first strip having a first edge attached to the ring adjacent to the first band. A second strip having a second edge attached to the ring adjacent to the second band. The first and second strips extend circumferentially around the ring and project toward each other. In an exemplary embodiment, the first and second strips project parallel to the axis.

The present invention further includes a method of joining pipe elements using a valve comprising: a plurality of segments attached end-to-end around a central space and a valve body positioned within the central space. In one exemplary embodiment, the method comprises:

inserting a pipe element into the central space from opposite sides of the valve;

pulling the segment toward the central space to engage the segment with the tubular member;

While the segment is pulled toward the central space, the protrusions on the segment are engaged with the valve body.

By way of further example, engaging the protrusions with the valve body includes circumferentially contacting the valve body with first and second circumferentially disposed protrusions extending from the segment toward the central space. Exemplary embodiments further include centering the valve body within the central space by engaging the protrusions on the segment with grooves within the valve body. In another example, engaging the protrusions on the segment with grooves within the valve body includes circumferentially contacting a circumferential groove within the valve body with the first and second circumferentially disposed protrusions extending from the segment toward the central space.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an isometric view of an exemplary embodiment of a combined valve and coupling according to the present invention;

FIG2 is an isometric exploded view of the combined valve and coupling shown in FIG1 ;

FIG2A is an isometric view of components of a combined valve and coupling;

3, 3A and 4 are partial cross-sectional views of the combined valve and coupling shown in FIG. 1;

5 and 6 are longitudinal sectional views of the combined valve and coupling shown in FIG. 1 ;

FIG7 is a cross-sectional view of the combined valve and coupling shown in FIG1 ;

FIG8 is an isometric view of components of the combined valve and coupling shown in FIG1 ;

9 and 10 are partial cross-sectional views of the combined valve and coupling shown in FIG. 1 ;

FIG11 is a cross-sectional view of the combined valve and coupling shown in FIG1 ;

FIG12 is an axial view of the combined valve and coupling shown in FIG1 ;

FIG13 is an isometric view of components of the combined valve and coupling shown in FIG1 ;

FIG14 is a partial view of the combined valve and coupling shown in FIG12 on an enlarged scale;

FIG15 is an axial view of the valve member of the combined valve and coupling shown in FIG1;

FIG16 is an isometric view of components of the combined valve and coupling shown in FIG1 ;

FIG17 is a partial cross-sectional view of the combined valve and coupling shown in FIG1;

FIG18 is a cross-sectional view of the combined valve and coupling shown in FIG1 ;

FIG19 is a partial cross-sectional view of the combined valve and coupling shown in FIG1 ;

20-25 are partial cross-sectional views of the combined valve and coupling shown in FIG. 1 ;

FIG26 is an isometric view of another exemplary embodiment of a combined valve and coupling according to the present invention;

FIG27 is an exploded isometric view of the combined valve and coupling shown in FIG26;

28-31 are longitudinal cross-sectional views of the combined valve and coupling shown in FIG. 26 ; and

32 is an isometric view of an exemplary embodiment of a combined valve and coupling according to the present invention.

DETAILED DESCRIPTION

Figures 1 and 2 illustrate an exemplary embodiment of a combined valve and coupling according to the present invention, hereinafter referred to as a "valve." Valve 10 comprises a plurality of segments (in this example, first and second segments 12 and 14) attached end-to-end around a central space 16. First and second connecting members 18 and 20 are positioned at opposite ends of at least two segments (in this example, each segment 12 and 14) to facilitate end-to-end attachment of the segments. Connecting members 18 and 20 are adjustably tightened to draw segments 12 and 14 toward each other and engage with pipe elements 22 and 24 (see Figure 31) to achieve an end-to-end connection of the pipe elements. In this example, the connecting member includes a lug 26 having a hole 28 that receives a fastener (e.g., a bolt 30 and nut 32) to provide adjustable tightening.

As shown in FIG2 , valve 10 further includes a valve body 34 positioned within central space 16 and captured between segments 12 and 14. Valve body 34 has an outer surface 36 facing segments 12 and 14 and an inner surface 38 defining an aperture 40 through the valve body. A valve closure member 42 is positioned within aperture 40 and is movable between an open and closed configuration. In this example, closure member 42 comprises a disc 44 rotatably mounted within valve body 34. Disc 44 is mounted on a stem 46 for rotation between an open and closed configuration. A portion of stem 46 extends through a neck 48 on valve body 34. Neck 48 extends through first segment 12 to allow a handle 50 (see FIG32 ) or other form of actuator to be attached to stem 46 to open and close valve 10.

As shown in Figures 2 and 3, a seal (in this example, a bushing 52) overlies the inner surface 38 of the valve body 34. The bushing 52 is made of a flexible, resilient material, such as an elastomer or urethane. In this exemplary embodiment, the bushing 52 includes a ring 54 having an inner surface 54a that surrounds the aperture 40 and sealingly engages the valve closure member 42 when the valve closure member 42 is in the closed configuration (shown in Figure 3). First and second lobes 56 and 58 are positioned on opposite sides of the ring 54. The lobes 56 and 58 extend circumferentially around the ring 54 and project in opposite directions along an axis 53 coaxial with the aperture 40. As shown in Figure 3, a portion of each lobe 56a and 58a surrounds a portion of the outer surface 36 of the valve body 34. As shown in Figures 3 and 5, each segment 12 and 14 has first and second circumferentially disposed protrusions 60 and 62 positioned on opposite sides of the segments 12 and 14. Protrusions 60 and 62 engage the valve body 34 and secure it within the central space 16. To this end, protrusions 60 and 62 extend toward the central space 16 and can be circumferentially continuous, as shown in FIG. 2 , or intermittent, taking the form of teeth, as shown in FIG. 2A . As shown by comparing FIG. 3 and FIG. 4 , when connecting members 18 and 20 (see FIG. 1 ) are adjustably tightened to draw segments 12 and 14 toward each other, first protrusion 60 engages the outer surface 36 of the valve body 34. Circumferential grooves 64 and 66 are advantageously formed to receive protrusions 60 and 62, respectively. The geometric relationship of protrusions 60 and 62 and grooves 64 and 66 is such that, through mechanical engagement between the protrusions and grooves, the valve body 34 becomes centered and secured within the central space 16 defined by segments 12 and 14.

When present, portion 56a of first lobe 56 also circumscribes outer surface 36 of valve body 34 and provides a seal between protrusion 60 and the valve body. Second protrusion 62 also engages outer surface 36 of valve body 34. When present, portion 58a of second lobe 58 circumscribes outer surface 36 of valve body 34 and provides a seal between protrusion 62 and the valve body. Figures 3 and 5 show segments 12 and 14 in a spaced-apart relationship, as they appear before the tubular element is inserted into central space 16, and Figures 4 and 6 show segments 12 and 14 as they appear after connecting members 18 and 20 are tightened to engage the segments with the tubular element and connect them end-to-end (the tubular element is not shown for clarity; see Figure 32). As shown in Figures 4 and 6, when segments 12 and 14 are drawn together to form the joint, portions 56a, 58a of lobes 56 and 58 are compressed between circumferential protrusions 60 and 62 and outer surface 36 of valve body 34. The engagement between the circumferential projections 60 and 62 and the lobes 56 a and 58 a serves to prevent dislocation of the bushing 52 relative to the valve body 34 due to forces acting on the bushing 52 by the valve closing member 42 when the valve is operated. The engagement between the circumferential projections 60 and 62 and the lobes 56 a and 58 a compresses and deforms the lobes 56 and 58 against the outer surface 36 of the valve body 34 and also serves to position and secure the valve body 34 relative to the segments 12 and 14, as explained above.

As shown in FIG7 , it is advantageous to provide segments 12 and 14 in a preassembled state, i.e., they are attached to each other by fasteners 30, 32 but maintained in a spaced relationship, for example, at a distance sufficient to allow the pipe element to be inserted into central space 16. The preassembled state of valve 10 allows the joint to be formed without first disassembling the valve and then reassembling it, thereby achieving significant time savings. To this end, first and second support bodies 68 and 70 are positioned adjacent to first and second connecting members 18 and 20. In the example shown in FIG7 , FIG8 and FIG9 , support bodies 68 and 70 each have a surface 72 that faces valve body 34 and engages bushing 52. Support bodies 68 and 70 also have at least first and second posts 74 and 76. Posts 74 and 76 extend away from central space 16 and are in a spaced relationship. In the preassembled state, segments 12 and 14 are supported in a spaced relationship on posts 74 and 76 and bushing 52. The support bodies 68 and 70 thus cooperate with the bushings to support the segments 12 and 14 in spaced-apart relationship. The spacing between the posts 74 and 76 determines the spacing between the segments 12 and 14 in the pre-assembled state and is sized to allow the tubular element to be inserted into the central space 16. In the exemplary embodiment shown, there are two sets of posts 74 and 76. In this example, the support bodies 68 and 70 are stamped from sheet metal.

Figures 4, 6, 10, and 11 illustrate valve 10 after connecting members 18 and 20 have been adjustably tightened. As shown in Figure 11, posts 74 and 76 are received within recesses 78 and 80 facing central space 16 and positioned adjacent connecting members 18 and 20 within segments 12 and 14. Recesses 78 and 80 are defined by angled ramp surfaces 82 (see Figure 2), which guide support bodies 68 and 70 into recesses 78 and 80 as segments 12 and 14 are drawn together. As shown in Figure 10, in this configuration, support bodies 68 and 70 help support lobes 56 and 58 near the connecting members to prevent them from extruding under pressure. Support for lobes 56 and 58 is achieved through contact with surfaces 72 of support bodies 68 and 70. Because valve 10 can be heavy for larger diameter pipe elements and the center of gravity is offset from the longitudinal axis of the pipe, it is advantageous to take measures to prevent the valve from rotating relative to the pipe element. The anti-rotation feature will prevent the valve from rotating under its own weight as well as when a force is applied to actuate the valve (e.g., when a handle is turned (see FIG32 )). In this example, as shown in FIG12 and FIG13 , relative rotation between valve 10 and the pipe element is prevented by providing a plurality of teeth 84 on bodies 68 and 70. Teeth 84 are provided on opposite sides of bushing 52 and project into central space 16 so as to engage pipe elements 22 and 24 (shown at 24 ) when the segments are drawn toward each other by adjustably tightening connecting members 18 and 20, as shown in FIG14 .

Another exemplary support body embodiment is shown in FIG. 15 , in which support bodies 86 and 88 are attached to valve body 34 at locations corresponding to the interface between segments 12 and 14 (not shown). Support bodies 86 and 88 are shown in detail in FIG. 16 and each include a base 90 having a surface 92 facing valve body 34 and a protrusion 94 extending away from central space 16 . In a valve 10 having support bodies 86 and 88 , in a pre-assembled state, segments 12 and 14 are supported in a spaced-apart relationship on protrusion 94 and bushing 52 . Support bodies 86 and 88 thus cooperate with bushing to support segments 12 and 14 in a spaced-apart relationship. The width 96 of protrusion 94 determines the spacing between segments 12 and 14 in the pre-assembled state and is sized to allow for insertion of a pipe element into central space 16 . In the exemplary embodiment shown, support bodies 86 and 88 are stamped from sheet metal.

As shown in FIG15 , first and second springs 98 and 100 are positioned adjacent to each base 90 at opposite ends of each support body 86 and 88. As shown in FIG16 , springs 98 and 100 in this example depend from base 90 and comprise plates having a "W" cross-sectional shape. The cross-sectional shape is defined by an apex 102, which is positioned between first and second legs 104 on opposite sides of apex 102. As shown in FIG17 , each support body (shown as 88) is mounted to valve body 34 via fasteners 106 extending through protrusions 94. A base spring 108 can be positioned between base 90 and valve body 34 to control radial movement of support bodies 88 and 90 relative to the valve body. As shown in Figure 18, the base spring 108 positions the support bodies 88 and 90 and biases them outwardly against the segments 12 and 14, and has a rigidity designed to support the segments in a sufficiently spaced relationship to allow the pipe element to be inserted into the central space 16 without disassembling the coupling from its pre-assembled state.

First and second springs 98 and 100, attached to the base 90 of each support body 88 and 90, operate between the valve body 34 and the segments 12 and 14. As shown in FIG19 , the valve body 34 has an outer profile 110 shaped to fit within and support the apex 102 of the springs 98 and 100 (100 shown). In this example, the outer profile 110 includes a ridge 112 protruding outward from the valve body 34, the ridge 112 being shaped complementary to the apex 102 of the springs 98 and 100. The support of the springs 98 and 100 by the ridge 112 allows the legs 104 of the springs 98 and 100 to flexibly support the segments 12 and 14 on the valve body 34 (see FIG20 ). A comparison of FIG20 and FIG21 shows the springs 98 and 100 (98 shown) in action. Because connecting members 18 and 20 (see FIG18 ) are adjustably tightened to pull segments 12 and 14 toward valve body 34, the legs 104 of springs 98 and 100 engage the segments, and the apex 102 of each spring is supported on ridge 112 ( FIG21 ). Inserting springs 98 and 100 between valve body 34 and segments 12 and 14 helps lock the valve body into the assembly, so that the valve body is relatively rigid within segments 12 and 14. The rigidity is determined by the stiffness of springs 98 and 100. Controlling the rigidity between valve body 34 and segments 12 and 14 allows the valve to better withstand the high axial loads encountered when the valve is closed and results in a better seal between disk 44 and seal (bushing 52), and between the valve and the connected pipe element. Positioning springs 98 and 100 between valve body 34 and segments 12 and 14 also better compensates for variations in dimensional tolerances between the various components, providing a tight fit with less stringent tolerances.

As shown in Figures 3 and 5, each segment 12 and 14 includes a channel 114 that extends circumferentially around the segment and faces the central space 16. Channel 114 is defined by first and second side surfaces 116 and 118 located on opposite sides of segments 12 and 14. A back surface 120 extends between the side surfaces. Lobes 56 and 58 are received within channel 114. In the exemplary embodiment shown, lobes 56 and 58 each include corresponding first and second strips 122. Each strip 122 has a first edge 124 attached to ring 54. Second edge 126 is disposed opposite first edge 124 and includes a sealing surface 128 that faces axis 53 and is engageable with a pipe element to form a fluid-tight seal when valve 10 is coupled to the pipe element, as described below. As further shown in Figure 3, lobe portions 56a and 58a surrounding portions of outer surface 36 of valve body 34 include first and second strips 130, respectively. Each strip 130 has a first edge 132 that is attached to the ring 54. Each strip 130 is adjacent a respective band 122 and extends circumferentially around the ring 54. The strips 130 project toward each other, parallel to the axis 53 in this example.

First lobe 56 has a first lobe surface 56b facing first side surface 116 of channel 114. Second lobe 58 has a second lobe surface 58b facing second side surface 118. Figures 4 and 6 show lobes 56 and 58 seated within channel 114, which occurs when connecting members 18 and 20 (see Figure 1) are adjustably tightened to draw segments 12 and 14 toward each other to form a joint between the pipe elements. When lobes 56 and 58 are seated within channel 114, lobe surfaces 56b and 58b contact respective side surfaces 116 and 118. Lobes 56 and 58 are thereby deformed toward center 134 of channel 114. During seating, lobes 56 and 58 are compressed between segments 12 and 14 and pipe elements 22 and 24. Sealing surfaces 128 of lobes 56 and 58 contact the outer surfaces of pipe elements 22 and 24, forming a fluid-tight seal, as shown in Figures 30 and 31. The mechanical engagement between the valve 10 and the pipe elements 22, 24 is achieved by first and second keys 136 and 138 positioned on opposite sides of each segment 12 and 14. Each key 136, 138 extends circumferentially around the central space 16 and projects toward the central space 16. Each key has an arcuate surface 140 that engages the corresponding pipe element 22, 24. In this example, the mechanical engagement is achieved by the keys engaging circumferential grooves 142 in the pipe elements 22 and 24 (see Figures 30 and 31). The valve 10 is not limited to grooved pipes, but is also compatible with flat-end and shouldered pipes.

As shown in FIG3 , when undeformed, the lobe surfaces 56 b and 58 b are angularly oriented relative to the corresponding side surfaces 116 and 118 of the channel 114. In the exemplary embodiment shown, the angled orientation of the lobes 56 and 58 is achieved by forming an angularly oriented strip 122 that forms the lobes. An orientation angle 144 of from about 10° to about 30° is practical, and an orientation angle of about 20° is advantageous for certain embodiments. As further shown in FIG3 , the width 146 of the ring 54 between the first and second lobe surfaces 56 b and 58 b is wider than the widest distance 148 between the first and second side surfaces 116 and 118 of the channel 114. These geometric relationships, i.e., the angular relationship between surfaces 56 b and 116 and 58 b and 118 , or the width relationship between the lobes 56 and 58 of the ring 54 and the channels 114 of the segments 12 and 14 , provide for the deformation and sealing effect of the lobes against the pipe elements as the lobes seat within the channels when the segments 12 and 14 are drawn together to form the joint.

FIG3A shows another embodiment of a ring 54 in which band 122 forms lobes 56 and 58, each having an arcuate cross-sectional shape 150. The sealing effect can be further enhanced by designing the undeformed shape of lobe surfaces 56b and 58b and the shape of side surfaces 116 and 118. As shown in FIG22, when undeformed, first and second lobe surfaces 56b and 58b can be convexly curved; FIG23 shows side surfaces 116 and 118 being convexly curved, and FIG24 shows both lobe surfaces 56b and 58b and side surfaces 116 and 118 being convexly curved. FIG25 shows a design in which lobes 56 and 58 are displaced toward central space 16 by respective extensions 152.

Another exemplary valve embodiment 154 encompassed by the present invention is illustrated in Figures 26-28 . Valve 154 differs from valve 10 in that the sealing configuration includes a bushing 156 and a shroud 158 . (The other components of valve 154 are substantially identical to those of valve 10 , and therefore, their description need not be repeated.) Bushing 156 and shroud 158 are made of a flexible, resilient material, such as an elastomer or urethane. As shown in Figures 27 and 28 , bushing 156 is positioned within valve body 34 and surrounds aperture 40 defined by the valve body. When in the closed configuration, bushing 156 sealingly engages valve closure member 42 (in this example, disc 44 ). As shown in Figure 28 , a portion 160 of bushing 156 extends around the valve body to a position between valve body 34 and segments 12 and 14 , where it engages shroud 158 . The engagement between bushing portion 160 and shroud 158 creates a seal between valve body 34 and segments 12 and 14 .

Shield 158 includes a ring 162 having first and second lobes 164 and 166 positioned on opposite sides. Lobes 164 and 166 are received within passages 114 of segments 12 and 14. First lobe 164 has a first lobe surface 164a facing first side surface 116 of passage 114. Second lobe 166 has a second lobe surface 166a facing second side surface 118. FIG29 shows lobes 164 and 166 seated within passage 114 when connecting members 18 and 20 (see FIG26) are adjustably tightened to draw segments 12 and 14 toward each other to form a joint between the pipe elements. When lobes 164 and 166 are seated within passage 114, lobe surfaces 164a and 166a contact respective side surfaces 116 and 118 (compare FIG28 and FIG29). Lobes 164 and 166 thus deform toward the center 120 of passageway 114 (not shown; see FIG3 ). During seating, the lobes are compressed between segments 12 and 14 and tubular elements 22 and 24 (not shown). Furthermore, shroud 158 is compressed between segments 12 and 14 and valve body 34. Each lobe 164 and 166 includes a corresponding band 168 with a sealing surface 170 that contacts the outer surface of tubular elements 22 and 24 and forms a fluid-tight seal. As with valve 10 , the mechanical engagement between valve 154 and tubular elements 22 and 24 is achieved via first and second keys 136 and 138 positioned on opposing sides of each segment 12 and 14. Each key 136 and 138 extends circumferentially around central space 16 and projects toward it. Each key has an arcuate surface 140 that engages a corresponding tubular element 22 and 24. In this example, the mechanical engagement is achieved by keying circumferential grooves 142 in the pipe elements 22 and 24 (see Figures 30 and 31). The valve 154 is not limited to grooved pipes, but is also compatible with flat end and shoulder end pipes.

As shown in FIG. 28 , when undeformed, lobe surfaces 164 a and 166 a are angularly oriented relative to respective side surfaces 116 and 118 of passage 114. An orientation angle 172 of about 10° to about 30° is practical, and an orientation angle of about 20° is advantageous for certain embodiments. As further shown in FIG. 28 , a width 174 of shroud 158 between first and second lobe surfaces 164 a and 166 a is wider than a widest distance 176 between first and second side surfaces 116 and 118. These geometric relationships, namely the angular relationships between surfaces 164 a and 116 and 166 a and 118, or the width relationships between lobes 164 and 166 of shroud 158 and passages 114 of segments 12 and 14, provide for a deformation and sealing effect when the lobes are seated within the passages when segments 12 and 14 are drawn together to form a joint.

The sealing effect can be enhanced by the design of the undeformed shape of the cam surfaces 164a and 166a and the shape of the side surfaces 116 and 118. Referring to Figures 22-25, the cam surfaces 164a and 166a and the surfaces 116 and 118 can take the same configuration as that shown for the cam surfaces 56a and 58a. The use of the shroud 158 in conjunction with the bushing 156 and its portion 160 prevents misalignment of the bushing 156 relative to the valve body 34 due to the action of the valve closure member 42 against the bushing 156 when the valve is operated. The engagement between the segments 12 and 14 and the shroud 158 also serves to position the valve body 34 relative to the segments 12 and 14 via the compressive forces applied by the segments 12 and 14 through the shroud 158, the bushing 156 and its portion 160, and against the valve body 34 when the segments 12 and 14 are drawn together to form the joint.

Figures 30-32 illustrate forming a pipe joint using a valve according to the present invention. By way of example, valve embodiment 10 is shown, it being understood that the description using embodiment 104 will be substantially similar.

As shown in FIG30 , valve 10 is in a pre-assembled configuration, with segments 12 and 14 held in a spaced-apart relationship, supported on posts 74 and 76 of support bodies 68 and 70 (see also FIG7 and FIG8 ). Those bodies are found supported on lobes 56 and 58 of bushing 52. (In an alternative embodiment using support bodies 86 and 88 , segments 12 and 14 would be supported on protrusions 94 , see FIG16 .) The segments are also directly supported by contacting the lobes. Fasteners (bolts 30 and nuts 32) hold the segments against lobes 56, 58 and posts 74, 76. The separation of segments 12 and 14 is sufficient to allow insertion of the tubular elements. As shown, tubular element 22 is inserted and tubular element 24 is inserted into central space 16. Once inserted, the outer surfaces of the tubular elements engage sealing surfaces 128 on each lobe 56, 58.

As shown in FIG31 , once tubular elements 22 and 24 are inserted, connecting members 18 and 20 (see also FIG11 ) are adjustably tightened (bolts 30 and nuts 32 are tightened), thereby drawing segments 12 and 14 toward each other. As the segments approach each other, first and second side surfaces 116 and 118 engage lobe surfaces 56 b and 58 b , respectively, deforming lobes 56 and 58 (see also FIG3 and FIG4 ) and compressing them between segments 12 and 14 and the outer surfaces of tubular elements 22 and 24 to form a fluid-tight seal around the tubular elements. Springs 98 and 100 are also compressed between valve body 34 and segments 12 and 14 (see also FIG20 and FIG21 ), as well as base spring 108 (if present) (see FIG17 ). Simultaneously, circumferentially disposed protrusions 60 and 62 on segments 12 and 14 engage lobe portions 56 a and 58 a , respectively (i.e., strips 130 in this exemplary embodiment, see FIG3 and FIG4 ). This engagement compresses the lobes 56a and 58a between the segments and the outer surface 36 of the valve body 34, thereby preventing misalignment of the bushing 52 when the valve 10 is operated and assisting in positioning the valve body 34 relative to the segments 12 and 14. To achieve compression of the lobes and lobes, the support bodies 74 and 76 are forced back into their respective recesses 78 and 80 (see FIG11 ), which move inward, disengaging the segments from the posts 74 and 76 and allowing the segments 12 and 14 to approach each other. Mechanical engagement between the segments 12 and 14 and the tubular elements 22 and 24 is also achieved when the arcuate surfaces 140 on the keys 136 and 138 engage the outer surfaces of the tubular elements, in this example, the circumferential grooves 142 of the tubular elements. When present, the teeth 84 on the support bodies 116 and 118 (see FIG12-14 ) grip the outer surfaces of the tubular elements 22 and 24 to prevent relative rotation between the tubular elements and the valve 10. As shown in Figure 32, for this exemplary valve, installation is accomplished when the segments 12 and 14 are in contact in what is known as a "pad to pad" engagement. In other exemplary embodiments, installation is accomplished when the fasteners are tightened to a specific torque.

Installing valve 10 to form a joint also illustrates a method for joining pipe elements, wherein valve body 34 is centered and secured within central space 16 defined by segments 12 and 14. This method is illustrated in Figures 30, 31, 3, and 4. As shown in Figures 30 and 31, pipe elements are inserted into central space 16 from opposite sides of valve 10. Segments 12 and 14 are drawn toward central space 16 by tightening connecting members 18 and 20 (see also Figure 32). As the segments are drawn toward each other as shown in Figures 3 and 4, circumferentially disposed protrusions 60 and 62 are brought into engagement with valve body 34. In this example, engagement is achieved through circumferential contact between protrusions 60 and 62 and valve body 34. It should be understood that if protrusions 60 and 62 were discontinuous, as shown in the exemplary embodiment of Figure 2A, contact between the protrusions and grooves would also be discontinuous. Centering and securing the valve body 34 within the central space 16 is accomplished by engagement of the protrusions 60 and 62 with corresponding circumferential grooves 64 and 66 within the valve body. In this example, engagement is accomplished by circumferential contact between the protrusions 60, 62 and their corresponding grooves 64 and 66, it being understood that if the protrusions 60, 62 were discontinuous as shown in the exemplary embodiment of FIG. 2A , the contact between the protrusions and the grooves would also be discontinuous.

It is expected that valves according to the present invention will provide for greater efficiency in joint formation, thereby offering significant advantages for both initial installation and maintenance of pipe networks.

Claims (66)

1. A valve, comprising: Multiple segments attached end-to-end to surround a central space, each segment having first and second circumferentially arranged protrusions extending toward the central space; A valve body positioned within the central space, the valve body having an outer surface facing the segment and an inner surface defining an orifice therethrough, the first and second circumferentially arranged protrusions engaging with the outer surface for securing the valve body within the central space; A closing member positioned within the hole, the closing member being movable between an opening and a closing configuration; A rod attached to the closing member for moving the closing member between the opening and closing configurations; and First and second connecting members, positioned at at least two opposite ends of the segments, are used to achieve end-to-end attachment of the segments. The valve further includes a bushing that overlaps the inner surface of the valve body and surrounds the orifice, which, when in the closed configuration, sealably engages the closure member. The bushing further includes a ring having first and second convex angles positioned on opposite sides thereof, a portion of the first convex angle surrounding a first portion of the outer surface of the valve body, the first protrusion engaging the first portion of the first convex angle, a portion of the second convex angle surrounding a second portion of the outer surface of the valve body, the second protrusion engaging the second portion of the second convex angle. 2. The valve according to claim 1, wherein: Each of the segments includes a channel that extends circumferentially around the central space and faces the central space, each channel being defined by first and second side surfaces located on opposite sides of the segment and a back surface extending between the side surfaces; The first convex corner has a first convex corner surface facing the first side surface, and the second convex corner has a second convex corner surface facing the second side surface; wherein When the convex corner is seated within the channel, at least a portion of the first and second convex corner surfaces respectively contacts the first and second side surfaces, causing the convex corner to deform toward the center of the channel. 3. The valve according to claim 2, wherein, when the convex angle is not deformed, the first convex angle surface is oriented at an angle relative to the first side surface, and the second convex angle surface is oriented at an angle relative to the second side surface. 4. The valve according to claim 2, wherein, when the convex angle is not deformed, the first and second convex angle surfaces include a convexly curved surface. 5. The valve according to claim 1, wherein: Each of the segments includes a channel that extends circumferentially around the central space and faces the central space, each channel being defined by first and second side surfaces located on opposite sides of the segment and a back surface extending between the side surfaces; A shroud is positioned between the valve body and the segment. The shroud includes a ring having first and second convex angles positioned on opposite sides thereon. The first convex angle has a first convex angle surface facing the first side surface, and the second convex angle has a second convex angle surface facing the second side surface. The first protrusion engages the first convex angle, and the second protrusion engages the second convex angle. When the shield is seated within the channel, at least a portion of the first and second convex angle surfaces respectively contacts the first and second side surfaces, causing the convex angles to deform toward the center of the channel. 6. The valve according to claim 5, wherein, when the convex angle is not deformed, the first convex angle surface is oriented at an angle relative to the first side surface, and the second convex angle surface is oriented at an angle relative to the second side surface. 7. The valve of claim 5, wherein, when the convex angle is not deformed, the first and second convex angle surfaces include a convexly curved surface. 8. The valve of claim 5, wherein a portion of the bushing extends between the valve body and the first and second sections, and the shroud sealably engages the portion of the bushing. 9. The valve according to claim 1, comprising only two of the segments. 10. The valve according to claim 1, wherein the closing member comprises a disc rotatably mounted within the valve body. 11. The valve of claim 1, wherein each of the segments further comprises first and second keys positioned on opposite sides of the segment, each key extending circumferentially around the central space and projecting toward the central space. 12. The valve of claim 11, wherein each of the keys includes an arcuate surface capable of engaging with a tubular element positioned within the central space. 13. The valve according to claim 1, further comprising: A first support body positioned adjacent to the first connecting member, the first support body having a surface facing the valve body and first and second columns extending away from the central space in a spaced-apart relationship, the first column engaging a first segment and the second column engaging a second segment; A second support body positioned adjacent to the second connecting member, the second support body having a surface facing the valve body and first and second posts extending away from the central space in a spaced-apart relationship, the first post of the second support body engaging the first segment, and the second post of the second support body engaging the second segment; wherein The surfaces of the first and second support bodies engage the bushing, and the column engages the segment, thereby the first and second support bodies cooperating with the bushing to support the first and second segments in a spaced-out relationship in a pre-assembled configuration. 14. The valve of claim 13, wherein the first and second support bodies include a plurality of teeth projecting toward the central space, the teeth being disposed on opposite sides of the valve body for engaging a tubular element positioned within the central space when the connecting members are adjustablely fastened to pull the segments toward each other. 15. The valve according to claim 13, further comprising: First and second springs are positioned adjacent to opposite ends of the first support body, the first spring being positioned between the valve body and the first segment, and the second spring being positioned between the valve body and the second segment; A third and a fourth spring are positioned adjacent to the opposite ends of the second support body, the third spring being positioned between the valve body and the first segment, and the fourth spring being positioned between the valve body and the second segment. 16. The valve according to claim 15, wherein: The first and second springs are attached to the first support body; and The third and fourth springs are attached to the second support body. 17. The valve of claim 15, further comprising: A circumferential ridge extending around the valve body, with the spring acting between the circumferential ridge and the first and second segments. 18. The valve of claim 17, wherein each of the springs has a “W” cross-sectional shape including a vertex positioned between first and second legs on opposite sides of the vertex, the vertex receiving the circumferential ridge for each spring, the legs of the first and third springs engaging the first segment, and the legs of the second and fourth springs engaging the second segment. 19. The valve according to claim 1, further comprising: A first support body positioned adjacent to the first connecting member, the first support body having a surface facing the valve body and a protrusion extending away from the central space, the protrusion engaging the first and second segments; A second support body positioned adjacent to the second connecting member, the second support body having a surface facing the valve body and a second protrusion extending away from the central space, the second protrusion engaging the first and second segments; wherein The surfaces of the first and second support bodies engage the bushing; the protrusions engage the segments, thereby, in a pre-assembled configuration, the first and second support bodies cooperate with the bushing to support the first and second segments in a spaced-out relationship. 20. The valve of claim 19, wherein the first and second support bodies include a plurality of teeth projecting toward the central space, the teeth being disposed on opposite sides of the valve body for engaging a tubular element positioned within the central space when the connecting members are adjustablely fastened to pull the segments toward each other. 21. The valve of claim 19, further comprising: First and second springs are positioned adjacent to opposite ends of the first support body, the first spring being positioned between the valve body and the first segment, and the second spring being positioned between the valve body and the second segment; A third and a fourth spring are positioned adjacent to the opposite ends of the second support body, the third spring being positioned between the valve body and the first segment, and the fourth spring being positioned between the valve body and the second segment. 22. The valve according to claim 21, wherein: The first and second springs are attached to the first support body; and The third and fourth springs are attached to the second support body. 23. The valve of claim 21, further comprising: A circumferential ridge extending around the valve body, with the spring acting between the circumferential ridge and the first and second segments. 24. The valve of claim 23, wherein each of the springs has a “W” cross-sectional shape including a vertex positioned between first and second legs on opposite sides of the vertex, the vertex receiving the circumferential ridge for each spring, the legs of the first and third springs engaging the first segment, and the legs of the second and fourth springs engaging the second segment. 25. The valve according to claim 19, further comprising: A first fastener extending between the protrusion of the first support body and the valve body; A second fastener extends between the protrusion of the second support body and the valve body, the fastener attaching the first and second support bodies to the valve body. 26. The valve of claim 19, further comprising: A first spring acting between the protrusion of the valve body and the first support body; A second spring acts between the protrusion of the valve body and the second support body, and the first and second springs respectively bias the first and second support bodies away from the valve body. 27. The valve of claim 1, wherein the protrusion is circumferentially continuous. 28. The valve according to claim 1, wherein the protrusion is circumferentially discontinuous. 29. A valve comprising: Multiple segments attached end-to-end to surround the central space; A valve body positioned within the central space, the valve body having an outer surface facing the segment and an inner surface defining an orifice therethrough; A closing member positioned within the hole, the closing member being movable between an opening and a closing configuration; A bushing that overlaps the inner surface of the valve body and surrounds the orifice, when in the closed configuration, the bushing sealably engages the closing member; A rod attached to the closing member for moving the closing member between the opening and closing configurations; and First and second connecting members, positioned at at least two opposite ends of the segments, are used to achieve end-to-end attachment of the segments. The bushing further includes a ring having first and second convex angles positioned on opposite sides thereof, a portion of the first convex angle surrounding a first portion of the outer surface of the valve body, the first protrusion engaging the first portion of the first convex angle, a portion of the second convex angle surrounding a second portion of the outer surface of the valve body, the second protrusion engaging the second portion of the second convex angle. 30. The valve of claim 29, wherein each segment includes first and second circumferentially disposed protrusions extending toward the central space, the first and second circumferentially disposed protrusions being engageable with the outer surface of the valve body for securing the valve body within the central space. 31. The valve according to claim 29, wherein: Each of the segments includes a channel that extends circumferentially around the central space and faces the central space, each channel being defined by first and second side surfaces located on opposite sides of the segment and a back surface extending between the side surfaces; The first convex corner has a first convex corner surface facing the first side surface, and the second convex corner has a second convex corner surface facing the second side surface; wherein When the convex corner is seated within the channel, at least a portion of the first and second convex corner surfaces respectively contacts the first and second side surfaces, causing the convex corner to deform toward the center of the channel. 32. The valve of claim 31, wherein, when the convex angle is not deformed, the first convex angle surface is oriented at an angle relative to the first side surface, and the second convex angle surface is oriented at an angle relative to the second side surface. 33. The valve of claim 31, wherein, when the convex angle is not deformed, the first and second convex angle surfaces include a convexly curved surface. 34. The valve according to claim 29, wherein: Each of the segments includes a channel that extends circumferentially around the central space and faces the central space, each channel being defined by first and second side surfaces located on opposite sides of the segment and a back surface extending between the side surfaces; A shroud is positioned between the valve body and the segment, the shroud including a ring having first and second convex angles positioned on opposite sides thereon, the first convex angle having a first convex angle surface facing the first side surface, and the second convex angle having a second convex angle surface facing the second side surface, the first protrusion engaging the first convex angle, and the second protrusion engaging the second convex angle; wherein When the shield is seated within the channel, at least a portion of the first and second convex angle surfaces respectively contacts the first and second side surfaces, causing the convex angles to deform toward the center of the channel. 35. The valve of claim 34, wherein, when the convex angle is not deformed, the first convex angle surface is oriented at an angle relative to the first side surface, and the second convex angle surface is oriented at an angle relative to the second side surface. 36. The valve of claim 34, wherein, when the convex angle is not deformed, the first and second convex angle surfaces include a convexly curved surface. 37. The valve of claim 34, wherein a portion of the bushing extends between the valve body and the first and second sections, and the shroud sealably engages the portion of the bushing. 38. The valve of claim 29, comprising only two of the segments. 39. The valve of claim 29, wherein the closing member comprises a disc rotatably mounted within the valve body. 40. The valve of claim 29, wherein each of the segments further comprises first and second keys positioned on opposite sides of the segment, each key extending circumferentially around the central space and projecting toward the central space. 41. The valve of claim 40, wherein each of the keys includes an arcuate surface capable of engaging with a tubular element positioned within the central space. 42. The valve of claim 29, further comprising: A first support body positioned adjacent to the first connecting member, the first support body having a surface facing the valve body and first and second columns extending away from the central space in a spaced-apart relationship, the first column engaging a first segment and the second column engaging a second segment; A second support body positioned adjacent to the second connecting member, the second support body having a surface facing the valve body and first and second posts extending away from the central space in a spaced-apart relationship, the first post of the second support body engaging the first segment, and the second post of the second support body engaging the second segment, wherein... In the pre-assembled configuration, the first and second support bodies mate with the bushing to support the first and second segments in a spaced-out relationship. 43. The valve of claim 42, wherein the first and second support bodies include a plurality of teeth projecting toward the central space, the teeth being disposed on opposite sides of the valve body for engaging a tubular element positioned within the central space when the connecting members are adjustablely fastened to pull the segments toward each other. 44. The valve of claim 42, further comprising: First and second springs are positioned adjacent to opposite ends of the first support body, the first spring being positioned between the valve body and the first segment, and the second spring being positioned between the valve body and the second segment; A third and a fourth spring are positioned adjacent to the opposite ends of the second support body, the third spring being positioned between the valve body and the first segment, and the fourth spring being positioned between the valve body and the second segment. 45. The valve according to claim 44, wherein: The first and second springs are attached to the first support body; and The third and fourth springs are attached to the second support body. 46. The valve of claim 44, further comprising: A circumferential ridge extending around the valve body, with the spring acting between the circumferential ridge and the first and second segments. 47. The valve of claim 46, wherein each of the springs has a “W” cross-sectional shape including a vertex positioned between first and second legs on opposite sides of the vertex, the vertex receiving the circumferential ridge for each spring, the legs of the first and third springs engaging the first segment, and the legs of the second and fourth springs engaging the second segment. 48. The valve of claim 29, further comprising: A first support body positioned adjacent to the first connecting member, the first support body having a surface facing the valve body and a protrusion extending away from the central space, the protrusion engaging the first and second segments; A second support body positioned adjacent to the second connecting member, the second support body having a surface facing the valve body and a second protrusion extending away from the central space, the second protrusion engaging the first and second segments; wherein In the pre-assembled configuration, the first and second bodies mate with the bushing to support the first and second segments in a spaced-out relationship. 49. The valve of claim 48, wherein the first and second support bodies include a plurality of teeth projecting toward the central space, the teeth being disposed on opposite sides of the valve body for engaging a tubular element positioned within the central space when the connecting members are adjustablely fastened to pull the segments toward each other. 50. The valve of claim 48, further comprising: First and second springs are positioned adjacent to opposite ends of the first support body, the first spring being positioned between the valve body and the first segment, and the second spring being positioned between the valve body and the second segment; A third and a fourth spring are positioned adjacent to the opposite ends of the second support body, the third spring being positioned between the valve body and the first segment, and the fourth spring being positioned between the valve body and the second segment. 51. The valve according to claim 50, wherein: The first and second springs are attached to the first support body; and The third and fourth springs are attached to the second support body. 52. The valve of claim 50, further comprising: A circumferential ridge extending around the valve body, with the spring acting between the circumferential ridge and the first and second segments. 53. The valve of claim 52, wherein each of the springs has a “W” cross-sectional shape including a vertex positioned between first and second legs on opposite sides of the vertex, the vertex receiving the circumferential ridge for each spring, the legs of the first and third springs engaging the first segment, and the legs of the second and fourth springs engaging the second segment. 54. The valve of claim 48, further comprising: A first fastener extending between the protrusion of the first support body and the valve body; A second fastener extends between the protrusion of the second support body and the valve body, the fastener attaching the first and second bodies to the valve body. 55. The valve of claim 48, further comprising: A first spring acting between the protrusion of the valve body and the first support body; A second spring acts between the protrusion of the valve body and the second support body, and the first and second springs respectively bias the first and second support bodies away from the valve body. 56. The valve of claim 49, wherein the protrusion is circumferentially continuous. 57. The valve of claim 49, wherein the protrusion is circumferentially discontinuous. 58. A seal for a valve having a valve closing member, the seal comprising: It has a ring surrounding the inner surface of the hole, the inner surface of which can be sealingly engaged with the valve closing member; First and second convex angles are positioned on opposite sides of the ring, the convex angles extending circumferentially around the ring and projecting in opposite directions along an axis coaxial with the hole; wherein each of the convex angles comprises: The belt has a first edge attached to the ring and a second opposing edge including a sealing surface facing the axis. 59. The seal according to claim 58, wherein each of the bands has an arcuate cross-sectional shape. 60. The seal of claim 58, wherein each of the bands is oriented at an angle relative to the axis. 61. The seal according to claim 58, further comprising: It has a first edge attached to the ring and a first strip adjacent to the first band; It has a second strip attached to the second edge of the ring and adjacent to the second strip; wherein The first and second stripes extend circumferentially around the ring and protrude toward each other. 62. The seal according to claim 61, wherein the first and second strips project parallel to the axis. 63. A method of using a valve connecting pipe element according to claim 1 or 29, the valve comprising a plurality of segments attached end-to-end around a central space and a valve body positioned within the central space, the method comprising: The tubular element is inserted into the central space from the opposite side of the valve; The segment is pulled toward the central space so that it engages with the tubular element; While pulling the segment toward the central space, the protrusion on the segment engages with the valve body. 64. The method of claim 63, wherein engaging the protrusion with the valve body comprises: causing the valve body to circumferentially contact the first and second circumferentially disposed protrusions extending from the segment toward the central space. 65. The method of claim 63, further comprising centering the valve body in the central space by engaging a protrusion on the segment with a groove within the valve body. 66. The method of claim 65, wherein engaging the protrusion on the segment with the groove in the valve body comprises: causing the circumferential groove in the valve body to circumferentially contact the first and second circumferentially arranged protrusions extending from the segment toward the central space.