HK1022733B - Short lift valve - Google Patents

Description

Short structure lift valve

The present invention relates to a poppet valve according to the preamble of claim 1.

The poppet valve almost only adopts a flange disc type shell in large-scale equipment, wherein a flange disc protruding forwards is arranged on the connecting side of the shell; the flanges have sealing surfaces and cooperate with corresponding flanges on the pipe elements to be joined. A sealing element is arranged between the two flanges in the region of the sealing surface, wherein the bolts passing through the flanges provide the necessary pretensioning force for the sealing connection. In order to ensure access to the bolts, a flange is loosely arranged on the lift valve housing. An advantage of such flanged poppet valves is that they are easy to replace if required. Loosening the bolts allows the poppet valve to be simply pulled out from between the flanges of the adjacent pipes and can be reloaded between the flanges and sealed in the same manner.

Other housing configurations are possible in order to equip the apparatus with fittings that are always suitable for different applications. In sleeve valves, the pipe ends are screwed into the sleeve and welded together. In valves of other constructions, the joint is designed as a welded end in order to be welded in a liquid-tight manner to the respective pipe end. The assembly and disassembly of such valves is costly. Different types of structures have different structural families and require high stocking costs for the manufacturer and the customer.

GB-a1359755 shows a poppet valve which is reduced in price by reducing material and machining costs and simplifying the structure. For this purpose a valve is proposed which is provided with a cylindrical passage in a tubular housing. This channel is intended to receive a replaceable part which abuts against a shoulder inside the tubular housing. The part contains the flow path of the liquid to be closed and the valve seat and requires a positioning element in order to precisely position the position of the part inside the housing and to be able to maintain it in said position. In a corresponding manner, a cover is arranged in the cylindrical housing of the fitting, in which the replaceable parts for mounting the valve-stem actuating element are fixed. This solution is suitable not only for fitting housings clamped between flanges, but also for housings equipped with flanges. However, such a construction is expensive compared to conventional fittings, since the manufacturing effort is considerably increased compared to cast fitting housings due to the complexity of the housing to be manufactured and the additional parts. For this reason, a considerable material loss occurs by the cutting process of the parts and additionally, owing to the parts, joints to be sealed are produced which may have corrosion problems. Furthermore, such valves have a considerable structural length. Long screws are therefore required for clamping, which in turn leads to considerable operational difficulties, since the removal and installation of the fitting requires a lot of space, which is difficult to provide in many installation states.

The existing standards determine the structural length of the poppet valve. The lifting valve is in principle composed of a housing part which comprises a movably arranged closing part and has a corresponding valve seat on a partition wall. On both sides of the housing part, flanges are provided by means of the passages. The medium flowing straight through the pipe to the poppet valve is diverted after passing the first flange in the transition region in order to be guided again in the axial direction of the continuously guided pipe via the valve seat with the respective closure element and from the opposite transition region of the housing. Such a wave path in poppet valves with a vertically disposed valve stem forces the structural length of the valve housing to be long, causing flow losses, and therefore the valves typically have a high flow coefficient ξ, which is typically on the order of about 4.

In order to obtain a suitable flow coefficient of the poppet valve, different types of constructions have been developed. One of them is the so-called straight-through valve. Such straight-through valves have a flow path between the connection flanges which is as straight as possible and in which a closure element is inserted which is arranged obliquely to the flow path. A disadvantage of this design is the obliquely extending valve rod. Such poppet valves are difficult to isolate in operation and have a large structural length depending on the mounting location.

The BOA convention developed by KSB marks poppet valves with small flow losses, reasonable zeta values of approximately 1.2 and shorter structural lengths, which can be shortened relative to conventional poppet valves having valve stems arranged perpendicular to the piping. For commercially available valves of the flange design, different design series are always required for different nominal pressure levels, which requires high storage costs during production, storage and installation.

DE-A2048580 describes a valve which is resistant to aggressive chemical materials and has two different structural lengths. The poppet valve uses a uniform semi-finished product to produce the combined structural form from special metal, so as to reduce the high cost of the special material. For this purpose, fig. 1 shows a purely welded construction, while fig. 5 shows a short design of the poppet valve, in which the housing cast from metal or plastic is made of inexpensive material. This outer shell is provided with a corrosion resistant inner shell. The dimensions of the inner shell and the closure and the functional parts acting together correspond to the corresponding parts in the embodiment of the housing in fig. 1. Thus, the manufacturing costs of parts made of unused metal are reduced due to the large number of identical parts in the case of two different design versions.

The circular solid valve cone is pressed into an oblong hole of a valve seat arranged obliquely in the housing and, in any wear state, is to be connected in a sealing manner to the edge of the oblong hole forming the valve seat, with the proviso that the solid valve cone is rotatably arranged in its lifting range in order to always lie against the remaining part of the valve seat surface of the valve cone.

The short construction valve shown in figure 5 of DE-a-2048580 uses only a 4-hole flange connection. When the flange is large or when it is necessary to use more than 4 bolt holes for use in a pipe system having a high pressure, the clamping structure shown in the figure cannot be used any more. The flange bolts that secure the fitting between the two flanges cannot pass through the housing in the region of the valve stem because of the mounting openings of the circular valve cone that extend in the housing perpendicularly to the flow direction. The poppet valve of fig. 5 has a structural length that is almost 60% greater than the corresponding nominal width.

The object of the invention is to develop a poppet valve which reduces the above-mentioned costs and has a wide range of applications and low flow losses. The technical solution of the above task is a poppet valve with the features of claim 1. The advantages of this design are manifold.

The entire poppet valve is significantly shortened and lightened and is therefore well suited for installation. This poppet valve can be clamped in the simplest manner between the flanges of the pipes to be connected. The flange, which is usually arranged on the poppet housing for connection to a corresponding flange of the pipe, is no longer required for mounting. It is likewise possible to dispense with those housing parts which produce the connection to the valve seat part and the flange. For this purpose, only the sealing surface is provided on the housing which only encloses the closure. The sealing surface, which in use sealing is also referred to as a sealing strip, is directly integral with the housing portion surrounding the closure and its lifting region. The end side of the housing simultaneously forms the sealing surface of the pipe element connected to the poppet valve. The sealing surface is thus in close proximity to the closure element, so that the poppet valve for the first time reaches a structural length whose dimensions are approximately in the range of or corresponding to the nominal width. This saves on the length of the pipe and the material used for the piping system. The structure length is shortened by 135-330mm in the range of nominal width DN 25-DN 150, compared with the conventional poppet valve. The length is shortened by 100 to 60mm compared with the structure of a poppet valve (BOA-Compact) with a short structure. This measure is advantageous for our exploitation of natural resources, and furthermore has the advantage that a low overall weight makes installation considerably easier and also reduces transport costs.

The structural length of the poppet valve is determined by the position of the valve seat and the wall thickness of the housing adjacent thereto. The valve seat can have a conical and planar valve seat geometry by being arranged obliquely to the flow direction and to the valve rod. The inclined valve seat may not only be arranged in a plane but may also provide a spatial curvature. When using a closure element which is mounted on a valve seat, a transition for the mounting surface is provided between the housing wall and the valve seat, which forms a separating wall in the housing when connected to the closure element. Furthermore, a further, for example conical or conical valve seat, which interacts with a correspondingly shaped closure element, can also be provided on such a partition wall or on the transition piece. In order to reduce the overall length, the valve seat or the wall surface or wall surface part on which the valve seat is mounted extends along a quasi-diagonal line on the housing end side. This line intersects the axis of the pipe or extends obliquely to the flow direction. It is important that the housing end face has a short and direct connection to the valve seat or to the housing part containing the valve seat. The housing end face can thus be moved toward the closure part, so that the overall length is significantly reduced. The distance between the housing end faces, which can be measured in the same direction, is only 25% to 50% greater than the length of the closure, which is projected on the pipe axis and is measurable in the axial direction. In contrast to the previously known solutions, this means that the distance is only slightly greater and a first measurable structural length of the poppet valve between the housing end sides is achieved, which preferably corresponds to the nominal width of the poppet valve dimension. The distance is substantially determined by the wall thickness of the housing, the length of the valve seat and the size of the transition from the valve seat to the housing.

In poppet valves, the separating wall is usually formed here almost exclusively by the valve seat of the closure element and the transition from the valve seat to the end face of the housing or the annular housing wall. This short construction length also brings other significant advantages. The structural length of the poppet valve represents a high price factor when building a building. Buildings must have a central distribution room, with distribution stations controlling the heating and air conditioning equipment and the plumbing of the water supply within the building. The distribution pipes of the pipe system extend generally vertically in the room of the distribution station. In order to be able to install a corresponding number of poppet valves with good throttling and regulating properties, which are manufactured in the usual standard constructional lengths, in these vertical distribution ducts, a large space height is required. With the new, significantly shortened poppet valve, a lower structural height is required for the distribution station, thereby reducing costs and increasing the utilization of the building.

To achieve a low resistance coefficient, the valve seat cross-section of the poppet valve is roughly on the order of the pipe joint cross-section and approximately the nominal width. The reduction of the cross-section of the valve seat relative to the pipe cross-section can reduce the structural length, but the flow coefficient ζ is reduced.

According to a further embodiment of the invention, the housing is designed as a ring, which is easy to produce and requires a minimum of material. The end side of the annular housing simultaneously serves as a sealing surface of the housing. In principle, the housing consists of an annular part, an obliquely arranged valve seat and an obliquely arranged separating surface containing the valve seat. The isolation surface can be arranged on the annular housing part by material connection, force connection or shape connection. The portion above it, commonly referred to as the housing neck, is used to position the closure and valve stem.

According to a further embodiment of the invention, the housing and the housing neck are designed as a single piece or as multiple pieces. In the case of a single-piece construction, the closure can be inserted into the housing from the side of the housing sealing surface. The two or more piece construction also allows for other mounting means, such as through a hole in the neck of the housing.

According to a further embodiment of the invention, the wall delimiting the lifting movement of the closure is concave toward the cavity in which the closure is placed, while the face of the closure abutting against this concave wall is convex, so that the closure can be arranged in a space-saving manner in the surrounding housing. The arcuate shape of the walls provides additional structural free space. In a normal lifting movement, which opens the entire flow cross section, the closure is moved from the valve seat into the cavity. Due to the bow the closure member can be moved further upwards in the cavity without being hampered by the bolt members and the necessary wall thickness delimiting the cavity.

According to a further embodiment of the invention, the poppet valve is designed as a clamping valve. The poppet valve can thus be clamped in a simple manner between the flanges of the pipes to be connected, independently of the permissible pressure level. The sealing surface on the flange interacts with the housing end side next to the closure when a flat seal is used. Bolt members connected to the flanges press the pipe flanges on both sides of the housing toward the housing and clamp therebetween.

For applications where such a poppet valve is used as an end fitting for a closed pipe, the housing can also be designed as an integral flange housing, thereby forming a seat for the bolt member. The bolt member presses the joint housing toward the pipe end.

In order to ensure a short overall length, a flange or a flange part is provided on the housing in the region between the housing ends, wherein the flange part is arranged in a plane intersecting the valve seat. In the case of an external symmetry of the housing structure, the valve seat is arranged asymmetrically in the housing, so that on one side of the housing the flange or flange part is located directly in front of the valve seat plane and on the other side of the housing the flange or flange part is arranged in a plane intersecting the valve seat. In order to ensure that the fastening element does not project beyond the connection when such a poppet valve is fixed as a terminal connection, the flange or the flange part is offset at least inwardly relative to the end face of the housing by a dimension corresponding to the height of the bolt head or the nut.

Poppet valves may also be installed in ductwork with a clamp connecting the housing to the duct. Likewise, the housing end face can be placed directly against the pipe end face and, depending on the mounting system used, a plurality of clamping elements designed as hinges can be used. For this purpose, grooves or projections are provided as abutments for the clamping elements on the housing circumference in the region of the housing ends. Such joining techniques are often found in the commodity industry.

DE-B-2311865 discloses a poppet valve designed as a diaphragm valve, which consists of three housing parts. An inexpensive pressure casting having approximately the same weight can be obtained with a three-piece construction. A housing center part provided with a sealing plate has a spatially extending flange surface, on which the flange ends are arranged with a circular band seal arranged in the middle and connected to the housing center part by means of tie rods. This fitting is only functional when connected to all three sub-parts.

In contrast, one embodiment of the invention provides that the housing end is designed as a joint of different connections of the line. Another embodiment provides that the connection is provided with different connection forms on the pipe side, here flanges, welded ends, nuts, etc. This solution greatly simplifies the use of the poppet valve, whereby the latter can also be installed afterwards in an existing pipe system or a pipe system with a different connection system. This basic design makes it possible to install fully functional poppet valves in the widest possible pipe systems with flanged connections in a simple manner without any problems. The flanges normally used can grip such poppet valves without problems. The design of the joint forming the sealed housing end face serving as the mounting nipple has the surprising advantage that the poppet valve can be pressed into the different pipe connection systems and mounted there without problems with a simple nipple. The joint is a simple rotationally symmetrical part and can be made by casting, machining and other methods. It can also be made in a short time, ready for pick-up, if necessary, and therefore does not require expensive storage costs for such parts. It is expedient for the manufacturer and its distributor to stock basic fittings of this functionality in order to use the fittings for different applications by means of simple fittings, if necessary.

For the use of such poppet valves as basic components, one embodiment of the invention provides that the housing part surrounding the closure element between the housing end sides is provided with one or more radially projecting abutments with a bore for the screw part. The bolt pieces of the connecting flange can be inserted through the holes and fastened to the flange. It is also possible to form a single abutment as a projection or flange hole, wherein each projection is provided with one or more holes. This measure means a further saving of material and enables the connection of the poppet valve to different types of flange. The holes may correspond to different international and/or national flange standards, such as ANSI, DIN, EN, etc. Also, the poppet valve may be used as a terminal fitting.

According to a further embodiment of the invention, the housing part through which the valve rod passes is provided with a bearing for the screw part. Typically, this housing part is the housing neck or the part of the poppet valve housing into which the closure member moves in the opening movement. The abutment may be a blind hole in which the bolt member is mounted. This design is useful in situations where the bolt members cannot pass through the neck of the housing from the side due to the narrow spacing of the flange holes.

Likewise, according to a further embodiment of the invention, the housing part penetrated by the valve rod is provided with a material deposit for the abutment, which is generally suitable for an abutment provided on the side next to the valve rod. The support surfaces of the above-mentioned supports and the mutually opposite supports extending parallel to the flange surfaces of the pipe flanges to be connected have a greater spacing than the remaining supports.

A further embodiment of the invention provides that the valve seat is arranged almost completely on the separating plane between the pipe axis and the region of the flow-through cavity facing away from the valve spindle. The closure and the cavity required for the lifting movement of the closure are always located in the bore pattern of the holes for the flange screw connections and in the bore pattern of the required housing wall thickness. In the region between the housing neck and the pipe axis, a cavity is provided which receives the closure during the opening movement of the poppet valve, so that only a small influence is exerted on the flow coefficient.

Very compact and flow-friendly poppet valves can be produced with the invention, the housing of which can be connected to very different or standard flanges. In addition, the solution with a smaller number of housings can be used for a wide range of applications.

The invention is illustrated in the accompanying drawings and described further below. Wherein the content of the first and second substances,

figures 1-3 show poppet valves of different nominal widths,

figures 4 and 5 the other two views of figure 1,

figures 6 and 7 the other two views of figure 2,

figures 8 and 9 the other two views of figure 3,

figures 10 and 11 figure 2 compares with the prior art,

figure 12 is a poppet valve with a separately machined valve seat,

figures 13 and 14 show two views of a poppet valve with an annular housing,

figure 15 shows a poppet valve with a different attachment fitting,

figures 16 and 17 show two views of a poppet valve with multiple struts,

figures 18-25 show a different arrangement of the poppet valve,

figure 26 is a perspective view of the housing,

fig. 27 shows a clamping plate for fastening a poppet valve.

Fig. 1-3 illustrate poppet valves having three different nominal widths. Where fig. 1 corresponds to a small nominal width range of about DN25, fig. 2 corresponds to a nominal range of about DN50, and fig. 3 corresponds to a nominal width of about DN 100. The view is partly broken away, wherein the valve seat areas are represented in section. In fig. 1 the housing 1 has a housing neck 2 in which a raised valve stem 3 is arranged, which can be operated by means of a hand wheel 4. The valve stem is connected to the closure 5. The connection between the valve seat 3 and the closure member 5 and the movement thereof is carried out in a known manner. In the illustration, the closing element 5 is pressed in a sealing manner into a valve seat 6, which is part of the separating surface 7. The middle part of the isolation surface 7 is indicated by a dash-dot line and can be regarded as a plane standing on the plane of the drawing. The separating surface 7 directly or indirectly originates from the housing ends 8, 9 and can be considered as a connecting surface of the housing ends 8, 9. Isolation surface 7 extends obliquely to and intersects pipe axis 10. The preferred flow direction is indicated by the arrow 11. The poppet valve can also be flowed through against a preferred direction. The closure member 5 can be lifted from the valve seat 6 by operating the hand wheel, the closure member 5 being moved into the cavity 12 above the valve seat 6 due to the elevated valve stem 3 used here.

The structural length of the poppet valve can be significantly reduced by designing the partition wall provided with the valve seat as a ramp surface adjoining the end side of the housing. Thus, the poppet valve may be clamped directly between the flanges of the pipes to be connected and secured therebetween as described in the following figures. Wherein, the partition wall can be distributed in a plane or a space curve.

Fig. 2 corresponds to the configuration shown in fig. 1, in which a protective cap 13 is attached to the hand wheel 4, which cap encloses the lifted valve spindle 3 and can be used to indicate the lifting position, for example by providing an opening which identifies the lifting position. The housing 1 is shown here with an abutment 14 which projects radially outward and is designed in the form of a ring and serves to guide the screw 15 shown in fig. 12. The bolt 15 may also abut directly against the abutment 14 when used as a terminal valve on a pipe. In contrast to fig. 2, fig. 1 shows a plurality of abutments 14.1 projecting radially from the housing 1, which are arranged offset from the axis of the valve rod 3. This measure makes it possible to arrange a part of the screw or a part of the nut within the length of the construction, so that both throughflow directions can be used as end valves. The dimension a indicated in fig. 2 relates to the overall length of the poppet valve or the spacing between the housing end sides 8 and 9 which defines the structural length. Dimension B corresponds to the projected length of the closure 5 on the duct axis 10. In the embodiment shown here, the structural length a of the poppet valve is only slightly greater than the projected length B. This is caused by the required wall thickness, the symmetrical arrangement of the valve spindle 3 relative to the structural length a and the transition between the separating surface 7 with the valve seat 6 and the housing wall. In an asymmetrical arrangement the length of the structure can be correspondingly shorter.

Represented in fig. 3 is a poppet valve having a nominal width of about DN100 or greater, where DN represents a poppet valve nominal width corresponding to about the diameter of the conduit to which the poppet valve is to be connected. In the illustrated embodiment, the isolation surface 7 has a spatially curved distribution due to deflection. This measure has the advantage over a large nominal width that the valve seat 6 is almost completely displaced into the region of the flow-through cavity 16 of the housing 1 facing away from the valve spindle 3 below the pipe axis 10. This has the decisive advantage that the cavity 12 accommodating the closure element 5 also moves in the lifting movement toward the line axis 10, so that it is ensured that the flow-through cavity 16 and the cavity 12 are located within the area enclosed by the screw bolts for clamping the poppet valve and the required housing wall. The number of bolts depends on the allowable pressure load, the structural dimensions and the nominal width of the poppet valve. More than four connectors are typically used. A centrally located support 14.1 is provided on the housing 1, in which a hole 17 for mounting a bolt (not shown) is provided. The transition between the housing neck 2 and the housing 1 is a support 14.2 designed as a material deposit, wherein at larger nominal widths, for example, passages and/or threaded bores, it is not possible to mount the screws directly on the side of the housing neck 2 due to the predetermined dimensions of the pipe flange and the housing neck 2. When used as a terminal valve, the material build-up 14.2 acts as a bearing surface for the bolt.

Fig. 4 and 5 show two further views of fig. 1. Fig. 4 is a side view, from which it can be seen that the housing 1 is provided with four radially projecting abutments 14.1 which serve as bolt abutments. The bolts are placed in the holes 17 and 17.1 of the support 14.1. The holes 17 and 17.1 connected to one another here correspond to different pressure loads and/or hole shapes in standard flanges to be connected, so that the poppet valve can be used in different technical ranges, so that the number of special devices can be significantly reduced, and the type of seat 14.1 shown here is preferably used in small nominal widths, wherein the pressure ranges specified for the flanges are the nominal pressures that must be withstood for PN6 and PN 10/16. As can be seen from the bottom view of the poppet valve in fig. 5, the abutment 14.1 is arranged offset laterally with respect to the valve stem, which allows the poppet valve, when used as a terminal valve, to accommodate a bolt and a nut within the structural length of the poppet valve in both its throughflow directions.

Fig. 6 and 7 show two additional views of fig. 2 showing a medium sized poppet valve having a nominal width of about DN 50. The support 14 is here fixed in the center of the housing 1 and likewise has interconnected bores 17 and 17.1 for bolts. The seat 14 serves as a seat for the bolt 15 when the poppet valve is used as a terminal valve on a pipeline. If the poppet valve is clamped between the two flanges, bolts are inserted through the holes 17 or 17.1 to press the flanges sealingly against the poppet valve. It can be seen from fig. 7 that the holder 14 is arranged in the center of the housing.

Fig. 8 shows a side view of fig. 3, and fig. 9 shows a cross-sectional view along IX-IX of fig. 3 in the same drawing. The seat 14.1 has dimensions that allow the provision of a plurality of holes 17 and 17.1. The medium openings 17 of the support 14.1 shown in fig. 8 correspond to those flange structures which are used in the pressure range PN 6. The outer bore 17.1 of the seat 14.1 represents the arrangement of the bores of the flange for a nominal pressure PN 16. In the transition to the housing neck 2, a material deposit 14.2 is provided, wherein, for example, simple through-holes, blind threaded holes, threaded holes or the like can be provided. Thereby also providing a bearing surface for the fastener when used as a terminal valve for a pipe.

Here, figure 8 shows a partial section with section line 12.1 and the cavity 12 is visible. From this section it can be seen that the wall 12.2 delimiting the cavity 12 with respect to the housing neck 2 is arcuate or spatially curved. In a corresponding manner, a curved surface 5.1 is formed on the closure 5 opposite the wall 12.2. When the poppet valve is fully open, the face 15.1 and the wall 12.2 abut. This feature allows the closure element 5 and the associated cavity 12 to be located entirely within the cavity defined by the holes 17 and 17.1 and the wall thickness of the housing at larger nominal widths, so that short construction lengths can be achieved at the same time with a reasonable drag coefficient ζ also at large nominal widths of the poppet valve. The surface 5.1 and the wall 12.2 corresponding thereto may also have a curve different from that shown in fig. 8.

Fig. 9 is a cross-section of the housing neck 2 of fig. 3, also showing a material deposit 14.2 with holes 17.1 arranged in the transition of the housing neck 2.

The poppet valves shown in figures 10 and 11 are shown in comparison to the arrangement of figure 2, with their nominal widths being the same. The structural length of the poppet valve can thereby be significantly reduced by means of the design according to the invention. Fig. 10 shows the structure of a KSB-poppet (BOA-Compact), while fig. 11 shows the structural length of a conventional poppet valve. The new structure in fig. 2 allows a significant saving of material while at the same time significantly simplifying installation, transport and storage. Furthermore, it is possible for the user of such a poppet valve to save on conduit length, as a result of which the space required for the conduit system is reduced.

Fig. 12 shows a design in which the housing 1 is annular and has a cylindrical through-flow cavity 16. The separating surface 7 provided with the valve seat 6 is designed here as a separate part and is sealingly fixed in the housing 1. This can be achieved by conventional means, in the present exemplary embodiment by means of a welded connection. For reasons of material saving, the housing end faces 8, 9 have, in some regions, radially projecting annular surfaces 18 for a sufficiently wide sealing surface when the poppet valve is clamped between pipe flanges 20, 21 shown in dashed lines with a flat seal 19. Furthermore, when the annular sealing surface 18 is located on the bolts 15 offset by 45 ° as shown by the dotted line, it means that the mounting becomes easy. During installation, the lower screw 15 is first inserted in order to serve as a support for the poppet valve which is inserted between the pipe flanges 20, 21 to be connected. The housing 1 here has a housing neck 2 designed as a separate part, which allows the closure 5 to be mounted through the opening 2.1 and the valve seat 6 to be machined if necessary.

Fig. 13 likewise shows a housing 1 of annular design, which differs from fig. 12 in that the housing is here completely cast in one piece. For mounting, the closure element 5 is introduced into the flow-through cavity 16 from the housing end 9 and is connected to the valve rod 3 therein.

As shown in fig. 14, a seating seat is provided on the outer side of the housing 1, and thus, the poppet valve can be only clampingly mounted between the flanges.

Figure 15 shows the connection of the poppet valve to two different fittings 22, 23. The left-hand joint 22 is formed by a connecting flange 20 provided with a welded connection piece. In the case of the use of a connection 22 that can be welded in a pipe system, a heat shield can be used, which in the exemplary embodiment shown simultaneously assumes the sealing function. The heat shield is mounted between the housing end face 8 and the flange 20 of the connector 22, so that further advantages arise during assembly. The poppet valve is supplied to the site with the pre-installed fitting 22. The poppet valve can be welded directly into the pipe due to the thermal protection shield, which is also pre-installed. Isolation of the poppet and the fitting during welding is not necessary. The heat shield prevents impermissible heating of the valve and enables a quick installation. Since in the present exemplary embodiment the screw elements 15, 15.1 are arranged at a distance from the poppet valve 1 and are not directly connected to the support 14, the heat shield between the screw 15 and the flange 20 can be dispensed with.

The right half of fig. 15 shows the connection of the poppet valve 1 to a fitting 23 which can be connected to a flange of a pipeline. Between the end side 9 and the flange 21 of the joint 23 is a conventional flange seal 19. The flanges 20, 21 of the joint used here are fastened together with bolt pieces 15, 15.1 functioning as tie rods.

The poppet valve shown in fig. 16 and 17 is provided on its outside with a plurality of seats 14.1 in two planes, in which threaded bores 17.2 are provided, into which the bolts of the adapter flange are screwed. Fig. 17 is a side view of fig. 16, with a nipple 22 with a welded connection. Since the connection 22 is connected to the housing support 14.1 by means of the screws 15, an additional thermal protection screen 24.1 is provided between the flange 20 and the screws 15.

The drawings with figures 18 to 25 show the possibility of combining the poppet valve with different joints. This type of fitting is used if existing equipment is to be retrofitted. The joint may also be installed in a pipe system with different connection systems. The fitting can be pre-assembled to the poppet valve prior to the time of supply and installation. The pre-installation of such a simply manufacturable fitting reduces costs to the manufacturer, distributor and equipment builder, thereby reducing valuable installation time at the installation site.

Fig. 18 shows a side view with a plurality of holders 14.1. The support has different holes 17, 17.1. The permissible pressure loading of the housing 1 is in the higher pressure range, so that the poppet valve can be used without problems in the lower pressure range, so that a design in the pressure range PN16 can be used in the pressure ranges 16, 10 and 6. There are correspondingly flange openings on different opening shapes, which can be compensated for by different openings 17, 17.1 on the poppet valve.

Fig. 19 shows, as an example, the connection between the poppet valve 1 and the joint 24 provided on the left side. The fitting is designed as a threaded flange, so that a threaded flange can be screwed onto an externally threaded pipe end, thus forming a pipe that can be connected to the poppet valve. The poppet valve is closed with a non-porous flange on the right side of fig. 19. This embodiment is used in a pipeline system which can be expanded and is only adapted to changing conditions in the future. The piping system can be expanded after the poppet valve by removing the imperforate flange 25.

Fig. 20 shows the connection of the poppet valve 1 to a fitting 22 designed as a welded connection. A thermal protection screen is also provided between the joint 22 and the housing 1. The connector 22 shown here is designed for a nominal pressure range of 16, while the similarly configured connector of fig. 21 is used in the example of a nominal pressure range of PN 6.

Figure 22 shows the poppet valve installed in a conduit system with a nominal pressure range of PN 16. On the left side of the poppet valve 1 is a flanged joint 23 which allows connection in a flanged pipe system. On the right side of the poppet valve is a fitting 26 in the form of a pre-welded flange. Here the pipe is welded directly to the pre-welded flange. For safety reasons, a thermal protection screen is provided between the poppet valve 1 and the fitting 26. The embodiment shown in fig. 23 corresponds substantially to that of fig. 22, with the difference that the poppet valve 1 is in a compensating position between two pipe systems with different pressure loads. The connector 23 arranged on the left is used for connecting a line system with a higher pressure load PN16, while the connector 26 on the right is provided with a lower pressure load PN6 as a connecting element of the line system. Fig. 24 and 25 are formed in a corresponding manner. The difference is however that the joint 23 used is designed as a flanged joint. The design of fig. 24 is used in a pipeline system with PN16, while the design of fig. 25 shows a connection between two pipeline systems, the system on the left being designed for PN16 and the right for PN 6.

It can be seen from the figures that the use of such poppet valves can be extended in a decisive manner by using only a single poppet valve. This measure means an advantageous utilization possibility.

FIG. 26 shows a housing 1 for poppet valves of larger nominal width, where the nominal width DN ≧ 80. Pipe flanges connected with more than four bolts are used on this larger nominal diameter. For the reasons mentioned above, poppet valves attached to such pipes have a corresponding number of seats or flange members 27, the holes 17 in which are used for bolts, not shown. Fig. 26 shows a weight-optimized housing in which the flange parts 27 are not connected to each other. If the material of the flange pieces 27 are connected to each other, a so-called integral flange is formed. Two flange parts 28 are used in the region of the neck of the housing, wherein the housing neck 2 and the bores 17 in the flange parts 28 have bores 17 into which screws can be inserted. The holes 17 are arranged on a circle corresponding to the pipe flange according to the standard used at the time. The pipe flanges have the same nominal width. The flange parts 28 are offset with respect to the housing end sides 8 and 9 toward the center of the housing. Due to this axial offset, a collar is formed between the bearing surface 29 of the flange part 28 and the housing end face 9, which collar is dimensioned such that the screw head or the nut of the fastening element, and possibly the necessary washer or securing element, resting thereon has an extension which does not protrude beyond the housing end faces 8, 9.

Fig. 27 shows the mounting of the housing 1 of the poppet valve on a pipe or the like with a ruler 30. The clip can be designed as a single piece or as interconnected pieces. The clip 30 interacts with the housing 1 via a groove 31 or a projection 32 provided thereon. The shape of the clip used compresses the poppet valve seal against the seal 33 or support member. The tensioning member 34 generates the force required for fixation in the clamp 30.

Claims (19)

1. Poppet valve, the housing (1) of which is provided with housing end sides (8, 9) arranged parallel to each other and sealingly pressed against the sealing surfaces of the pipe and/or the support, in the housing neck (2) of which is arranged a valve rod (3) placed vertically on the pipe axis (10), a closing element (5) connected to the valve rod (3) acting together with a valve seat (6), the housing end sides (8, 9) wholly or partly surrounding the closing element (5) and the constituent parts of the housing part of the lifting area, the valve seat (6) being arranged obliquely to the valve rod (3) and arranged as a connecting inclined surface in the area between the housing end sides, the distance (A) between the housing end sides (8, 9) being slightly greater than the projected length (B) of the closing element (5) on the pipe axis (10), characterized in that the structural length of the poppet valve, i.e. the housing end sides (8, 9) the distance (a) between is determined by the corresponding shape of the wall thickness of the housing, the length of the valve seat and the size of the transition from the valve seat to the housing, and lies within the respective nominal width of the poppet valve size.

2. A poppet valve according to claim 1, characterised in that the distance (a) between the end sides (8, 9) of the housing corresponds to or is shorter than the respective nominal width (DN) of the poppet valve size.

3. Poppet valve according to claim 1 or 2, characterized in that the housing (1) is designed in the form of a ring.

4. A poppet valve according to claim 1, 2 or 3, characterized in that the housing (1) and/or the housing neck (2) are designed as a single piece or as multiple pieces.

5. A poppet valve according to one of claims 1 to 4, characterized in that the wall (12.2) delimiting the lifting movement of the closure member (5) is designed concave towards the cavity (12).

6. A poppet valve according to any one of claims 1 to 5, characterized in that the face (5.1) of the closure member (5) which abuts against the concave wall (12.2) is designed to be convex.

7. A poppet valve according to any one of claims 1-6, characterized in that the valve is designed as a clamping valve.

8. A poppet valve according to any one of claims 1 to 7, wherein the housing is designed as an integral flange housing.

9. A poppet valve according to any one of claims 1 to 7 wherein a flange or flange member is provided on the housing in the region between the end sides of the housing, wherein the flange member is disposed in a plane which intersects the valve seat.

10. A poppet valve according to any one of claims 1 to 7, wherein the flange or flange part is offset at least inwards with respect to the end side of the housing by a dimension corresponding to the height of the bolt head or nut.

11. A poppet valve according to any one of claims 1 to 7 wherein a clamp member connects the housing to the conduit.

12. A poppet valve according to claim 11, wherein the housing is provided with grooves or projections on its circumference in the region between the end sides of the housing, which serve as abutments for the clamping member.

13. Poppet valve according to one of the claims 1 to 12, characterized in that the end sides (8, 9) of the housing are designed as joints for connection with the connections (22, 23, 24, 25, 26) of the conduit.

14. Poppet valve according to claim 13, characterized in that the connections (22, 23, 24, 25, 26) are provided with different types of connections on the pipe side.

15. Poppet valve according to one of claims 1 to 14, characterized in that the housing area surrounding the closing element (5) between the housing end sides (8, 9) is provided with one or more radially protruding abutments (14, 14.1, 14.2) in which bores (17) for the screw elements (15, 15.1) are provided.

16. Poppet valve according to any of claims 1-15, characterized in that the housing neck (2) to which the valve stem (3) is mounted is provided with an abutment (14.2) for the bolt member (15, 15.1).

17. Poppet valve according to one of the claims 1 to 16, characterized in that the housing neck (2) penetrated by the valve stem (3) is provided with a material deposit (14.2) for arranging the seat (14.2).

18. Poppet valve according to one of claims 1 to 17, characterized in that the valve seat (6) is arranged almost completely between the pipe axis (10) and the part of the throughflow cavity (16) facing away from the valve stem (3).

19. A poppet valve according to any one of claims 1 to 18 wherein one or more thermal shields are provided between the poppet valve and the fitting.