WO2019177229A1 - Flange connector for pipes assembled without welding - Google Patents

Abstract

The present invention relates to a water supply facility and a flange connector for pipes assembled without welding and, more specifically, to a flange connector for tap water pipes assembled without welding, the flange connector comprising: a pipe having an uneven portion formed at the outer surface thereof, wherein a snap ring is fitted into a groove in the uneven portion; an airtight gasket which has a hollow space formed in the center portion thereof and a protruding airtight member formed on the outer side of the hollow space with a spacing corresponding to the outer diameter of the pipe, wherein the airtight member makes surface contact with the snap ring and a flange; the snap ring which serves to keep a fluid in an airtight state between the airtight gasket and the flange, is partially cut and thus can be widened, and is fitted into the uneven portion at the outer surface of the pipe so as to serve as a cushion between the flange and the airtight gasket; and the flange which has a hollow space formed in the center portion thereof and a plurality of fastening holes formed on the outer side of the hollow space, and has a curved shaped portion indented from the inner surface thereof so as to allow the airtight gasket to be fitted into the curved shaped portion.

Description

Welded Prefabricated Pipe Flange End Connections

The present invention relates to a non-welded assembly pipe flange connector, more specifically, having a concave-convex on the outer surface, the pipe is fitted with a snap ring in the concave-convex groove; An airtight member is formed in a center portion of the hollow and at an interval between the outer diameter lengths of the pipe, and the airtight member includes a gastight gasket which is in surface contact with the snap ring and the flange; A snap ring having a function of maintaining the airtightness of the fluid between the hermetic gasket and the flange, the part of which is cut open and inserted into the unevenness of the outer surface of the pipe to act as a buffer for the flange and the hermetic gasket; And a flange having a hollow portion in the center and a plurality of fastening holes at an outer side thereof, the flange having a bent shape drawn into the inner surface so that the airtight gasket is fitted thereto.

In general, the pipe flange must be structurally larger than the outer diameter of the pipe pipe, so most of the pipe flanges are formed as separate components on the outside surface of the pipe pipe, except when the pipe is manufactured by casting. In the bonded state, the joint is welded to form an integral flange at the end of the pipe.

Conventionally, a flange is welded to a pipe pipe by simply inserting a tip of a pipe pipe to be fixed by a fixing hole formed in the flange, and then welding the connecting portion, thereby completing a series of flange welding operations.

However, since the flange is welded to the end of the pipe pipe and then a plurality of fastening holes for fastening with the flange welded to the end of the other pipe pipe at regular intervals, without considering the position of the fastening hole formed in the flange, In other words, by inserting the welding hole into the end of the pipe pipe by welding the fixing hole formed in the flange so that the position of the fastening hole is not the correct position, the position of the fastening hole formed in the flange when connecting each flange to connect the pipe pipe and the pipe pipe. There is a closed end that one of the two pipes to be connected due to the different problems.

In addition, it takes a long time to weld the pipe pipe to the flange, difficult to maintain, difficult to absorb stress such as bending and torsional moment of the pipe due to the earthquake and vibration, and there is a tendency to increase the risk of fire and fire.

On the other hand, the pressure of the water supply pipe is 4Mpa 40.9k, the pressure of the gas pipe is generally 0.3k, the high pressure is within 2k, and if the gas pipe is non-asbestos, it is -100 ° ~ 250 °.

There is a risk of explosion or large fire in the piping of such gas and oil facilities, and especially the welding piping used for renovation works is very dangerous.

Therefore, if certain conditions are met in gas and oil facilities, there is no choice but to use non-welded prefabricated pipes.

<Prior Patent Documents>

(Patent Document 1) Korean Patent Publication No. 2000-0006844

(Patent Document 2) Korean Registered Patent No. 0337230

(Patent Document 3) Korean Registered Patent No. 1134992

(Patent Document 4) Korean Patent Publication No. 2012-0049933

The present invention has been made to solve the above problems, and an object of the present invention is to provide a non-welded assembly pipe flange connector that can be used for high-pressure piping using a special gasket of a special material and form without welding. .

In order to solve the above problems, the present invention has a concave-convex on the outer surface, the pipe is fitted with a snap ring in the concave-convex groove; An airtight member is formed in a center portion of the hollow and at an interval between the outer diameter lengths of the pipe, and the airtight member includes a gastight gasket which is in surface contact with the snap ring and the flange; A snap ring having a function of maintaining the airtightness of the fluid between the hermetic gasket and the flange, the part of which is cut open and inserted into the unevenness of the outer surface of the pipe to act as a buffer for the flange and the hermetic gasket; And a flange having a bent shape in which a hollow portion and a plurality of fastening holes are formed at an outer side of the central portion thereof, and having a bent shape drawn into the inner surface to fit the hermetic gasket.

The hermetic member includes a horizontal surface portion in contact with an outer surface of the pipe; A vertical surface portion contacting one surface of the snap ring; And an inclined surface portion having a structure that gradually increases to correspond to an inclined surface of a bend introduced into the inner surface of the flange.

The flange is in the shape of a cylindrical plate, the vertical and horizontal surfaces of the bent shape is in contact with the snap ring, the inclined surface is in contact with the inclined surface portion of the airtight gasket, the bolt is inserted into the fastening hole formed through the pair of flanges, The pair of pipes are interconnected by fastening with nuts.

The snap ring has a rectangular cross-sectional shape, the first surface is inserted into contact with the uneven groove of the pipe, the second surface and the third surface is in contact with the vertical and horizontal surface of the flange, the fourth surface is the vertical surface of the airtight gasket Contact with wealth.

The hermetic gasket is divided into a space hermetic ring and a gasket, and the space hermetic ring has a horizontal surface portion in contact with an outer surface of the pipe; A pair of vertical surface portions contacting one surface of the snap ring and one surface of the gasket; And an inclined surface portion having a structure that gradually increases to correspond to an inclined surface of a bend introduced into the inner surface of the flange.

The present invention made as described above can be coupled to the flange and the pipe without using the welding not only improves workability and safety can be significantly reduced construction costs accordingly.

In addition, the present invention can increase the sealing force that can be used in the high-pressure pipe to be coupled to the airtight while acting as a buffer to the contact portion using a tapered form, not welding.

In addition, the present invention includes a tapered shape having a wider inner diameter gradually increasing inclination, and are fully interfitted and fixedly coupled to each other, thereby increasing the frictional force of the tapered inner circumferential surface, thereby preventing it from being released even when an impact comes to the other side.

1 is a cut view showing the overall connection state of the welded prefabricated pipe flange connector according to an embodiment of the present invention.

FIG. 2 is a view illustrating in detail the cut plane of FIG. 1. FIG.

3 is a view showing a flange of the welded prefabricated pipe flange connector according to an embodiment of the present invention.

Figure 4 is a view showing the snap ring of the welded prefabricated pipe flange connector according to an embodiment of the present invention.

5 is a view showing a gas tight gasket of the welded prefabricated pipe flange connector according to an embodiment of the present invention.

6 is a view showing a detailed coupling form according to an embodiment of the present invention.

FIG. 7 is a view illustrating a form in which an airtight gasket, a snap ring, and a flange are coupled according to an embodiment of the present invention.

8 is a view showing an airtight gasket formed by raising a gastight member at a distance between a hollow portion and a center of an outer diameter length of the pipe in a central portion thereof according to an embodiment of the present invention.

9 is a view showing a detailed cut surface of the flange according to an embodiment of the present invention.

10 is a view showing a detailed cut surface of the snap ring according to an embodiment of the present invention.

11 is a view showing a cutaway view and a plan view of the space hermetic ring as another embodiment of the present invention.

12 is a cross-sectional view and a plan view of a gasket according to another embodiment of the present invention.

FIG. 13 is a cross-sectional view of the gasket and the space sealing ring of FIGS. 11 and 12 replacing the airtight gasket of FIG.

14 is a view showing a combined state as another embodiment of the present invention.

As a best mode for solving the above problems, the present invention has a concave-convex on the outer surface, the pipe is fitted with a snap ring in the concave-convex groove; An airtight member is formed in a center portion of the hollow and at an interval between the outer diameter lengths of the pipe, and the airtight member includes a gastight gasket which is in surface contact with the snap ring and the flange; A snap ring having a function of maintaining the airtightness of the fluid between the hermetic gasket and the flange, the part of which is cut open and inserted into the unevenness of the outer surface of the pipe to act as a buffer for the flange and the hermetic gasket; And a flange having a bent shape in which a hollow portion and a plurality of fastening holes are formed at an outer side of the central portion thereof, and having a bent shape drawn into the inner surface to fit the hermetic gasket.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the pipe connector according to an embodiment of the present invention. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structure is shown to enlarge a little than the actual for clarity of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

In addition, the reference number added with a single quotation mark (') means a similar component, but the internal configuration may be different.

Unless defined otherwise, all terms used herein, including technical terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is a cut view showing the overall connection state of the welded prefabricated pipe flange connector according to an embodiment of the present invention, Figure 2 is a view showing in detail the cut surface of Figure 1, Figure 3 of the present invention 4 is a view illustrating a flange of the welded prefabricated pipe flange connector according to an embodiment, and FIG. 4 is a view illustrating the snap ring of the welded prefabricated pipe flange connector according to an embodiment of the present invention.

As shown in Figures 1 to 4 the present invention pipe 100; Hermetic gasket 300; Snap ring 250; Flange 200; And the like.

Looking at in detail, the pipe 100 is a pipe having a concave-convex on the outer surface, the snap ring 250 is fitted into the concave-convex groove.

The airtight gasket 300 is formed in the center portion at the interval of the outer diameter length of the pipe on the outside and the hollow, it is a structure that can minimize the gap between the pipe.

The airtight gasket 300 is formed by circumferentially surrounding the airtight member 302, and the airtight member is a gasket which is in surface contact with the snap ring 250 and the flange 200.

In addition, the EPDM gasket used as the airtight gasket 300 is a gasket in which a fluororesin film is press-heat-molded and integrally adhered integrally with EPDM rubber as a center material, or it is equipped with both rubber elasticity, PTFE heat resistance and chemical resistance, and sealing. It is preferable to use a gasket etc. which are excellent in sealing.

In addition to the hermetic gasket 300, asbestos, aluminum metal, hard metal, nonferrous metal, plastic, rubber, or the like may be used.

At this time, the present invention can be used for all piping, including gas or oil piping, if the space sealing or gas tight gasket material is different.

The snap ring 250 is formed in the shape of a "o" ring, but the cross-sectional shape is rectangular, and has a function of maintaining the airtightness of the fluid between the airtight gasket 300 and the flange 200, a part is cut open It is a ring that is fitted to the unevenness of the outer surface of the pipe 100 serves as a buffer of the flange and the airtight gasket 300.

The flange 200 has a hollow and a plurality of fastening holes 210 at the center thereof, and is a member having a bent shape drawn into the inner surface to fit the airtight gasket 300.

Therefore, while the flange 200 is in contact with the portion to act as a shock absorber, it can be coupled to the high airtightness.

In addition, although the work of fitting the gasket 300, the snap ring 250 and the flange 200 to each other was quite cumbersome, the present invention is easy to fit the taper shape, etc. centering around the pipe 100 without welding. The work is convenient.

Figure 5 is a view showing a gas tight gasket of the welded prefabricated pipe flange connector according to an embodiment of the present invention, Figure 6 is a view showing a detailed coupling form according to an embodiment of the present invention, Figure 7 of the present invention 2 is a view illustrating a form in which a gasket, a snap ring, and a flange are coupled according to an embodiment.

As shown in FIG. 5, the airtight gasket 300 is formed to be circumferentially formed so that the airtight member 302 is raised, and the raised shape is preferably a tapered shape at one side.

Therefore, both sides are not tapered, so the other side may be closely attached to the flat surface of the pipe 100, and one side may be tightly coupled to the tapered surface of the flange 200.

As shown in FIG. 6, first, the flange 200 is coupled to an arbitrary position of the pipe 100, and then a snap ring 250 having a “o” ring shape is connected to the uneven surface of the pipe 100. Fix the flange 200 by combining.

As shown in FIG. 7, the flange 200 and the airtight gasket 300 are coupled to each other with the snap ring 250 interposed therebetween, so that the surface contact portion and the tapered contact portion may be properly harmonized and disassembled. Can reproduce difficult connection structures.

8 is a view showing an airtight gasket formed by raising an airtight member at an interval of the outer diameter length of the pipe on the outside and the hollow in the center portion, according to an embodiment of the present invention, Figure 9 is an embodiment of the present invention Figure 10 is a view showing a detailed cut surface of the flange according to, Figure 10 is a view showing a detailed cut surface of the snap ring according to an embodiment of the present invention.

As shown in FIG. 8, the airtight member 302 includes a horizontal surface portion 302-3 in contact with an outer surface of the pipe 100; A vertical surface portion 302-2 contacting one surface of the snap ring 250; And an inclined surface portion 302-1 having a structure that gradually increases to correspond to an inclined surface of a bend drawn into the inner surface of the flange 200.

That is, the airtight member 302 has a tapered shape in which the portion toward the outer flange 200 gradually decreases in inclination, and thus, the airtight member 302 is easy to be assembled and difficult to be disassembled and freed from vibration and seismic problems.

In addition, according to the airtight member 302 to effectively suppress the left and right shake in a tapered shape to solve the problems such as cracked or popped shape of the entire non-welded assembly pipe flange connector by earthquake or vibration to enhance the seismic performance.

Therefore, the close contact between the tapered shape of the airtight member 302 and the outer flange 200 has the same durability as welded, and further improves workability and safety.

As shown in FIG. 9, the flange 200 has a cylindrical plate shape, the vertical surface 200-5 and the horizontal surface 200-1 of the bent shape contact the snap ring 250, and the inclined surface 200-3. ) Is in contact with the inclined surface portion (302-1) of the airtight gasket 300, the bolt is inserted into the fastening hole formed through the pair of flanges, and the pair of pipes are interconnected by fastening with a nut. .

As shown in FIG. 10, the snap ring 250 has a rectangular cross-sectional shape, and the first surface 250-1 is inserted into and contacts the uneven groove of the pipe 100, and the second surface 250-2 is in contact with each other. ) And the third surface contact the vertical surface 200-5 and the horizontal surface 200-1 of the flange 200, and the fourth surface contacts the vertical surface portion 302-2 of the hermetic gasket 300.

Meanwhile, as shown in FIGS. 11 to 14, another embodiment of the present invention includes a pipe 100 of FIG. 1; Snap ring 250; Flange 200; the same configuration, it is possible to facilitate the manufacturing process and production by dividing the airtight gasket 300 into a space hermetic ring (302 ') and the gasket (304').

That is, the space hermetic ring (302 ') is a horizontal surface portion in contact with the outer surface of the pipe 100; A vertical surface portion contacting one surface of the snap ring 250; And an inclined surface portion having a structure that gradually increases so as to correspond to an inclined surface of a bend introduced into the inner surface of the flange 200.

In addition, the gasket 304 ′ is connected to a pair of snap rings 250, a flange 200, and a space hermetic ring 302 ′ connecting the pair of pipes 100 to prevent gas from flowing into a specific space. With one gasket, leakage of gas or the like generated in both directions can be prevented.

The gasket 304 ′ may be used as a material of asbestos, aluminum metal, hard metal, nonferrous metal, plastic, rubber, or the like in a pipe in a gas facility or an oil facility.

At this time, the present invention can be used for all piping, including gas or oil piping, if the space sealing or gas tight gasket material is different.

Claims (5)

Pipe 100 having a concave-convex on the outer surface, the snap ring 250 is fitted into the concave-convex groove; The airtight member is formed in the center portion and the airtight member is raised at intervals of the outer diameter length of the pipe on the outside thereof, and the airtight member includes an airtight gasket 300 which is in surface contact with the snap ring 250 and the flange 200; The airtight gasket 300 has a function of maintaining the airtightness of the fluid between the flange 200, a part is cut open and is inserted into the unevenness of the outer surface of the pipe 100, the flange and the airtight gasket 300 A snap ring 250 serving as a buffer of the; And A hollow having a central portion and a plurality of fastening holes 210 on the outside thereof, and a flange 200 having a bent shape drawn into the inner surface so that the hermetic gasket 300 is fitted therein; Welded prefabricated pipe flange end connections. The method of claim 1, The hermetic member, A horizontal surface portion 302-3 in contact with the outer surface of the pipe 100; A vertical surface portion 302-2 contacting one surface of the snap ring 250; And Welded prefabricated pipe connection connector characterized in that it comprises a; inclined surface portion 302-1 having a structure that gradually increases to correspond to the inclined surface of the bent to the inner surface of the flange 200. The method of claim 1, The flange 200 has a cylindrical plate shape, the vertical surface 200-5 and the horizontal surface 200-1 of the bent shape contact the snap ring 250, and the inclined surface 200-3 is an airtight gasket 300. Contactless inclined surface portion (302-1) of the non-welded prefabricated type, characterized in that the bolt is inserted into the fastening hole formed through the pair of flanges, and the pair of pipes are interconnected by fastening with a nut. Pipe Flange End Connections. The method of claim 1, The snap ring 250 has a rectangular cross-sectional shape, and the first surface 250-1 is inserted into and contacts the uneven groove of the pipe 100, and the second surface 250-2 and the third surface are flanged. A welded prefabricated pipe flange, which is in contact with the vertical surface 200-5 and the horizontal surface 200-1 of 200, and the fourth surface is in contact with the vertical surface portion 302-2 of the airtight gasket 300. Connector. The method of claim 1, The hermetic gasket 300, Divided into a space hermetic ring (302 ') and a gasket (304'), The space hermetic ring (302 ') is a horizontal surface portion in contact with the outer surface of the pipe (100); A pair of vertical surface portions contacting one surface of the snap ring 250 and one surface of the gasket 304 '; And an inclined surface portion having a structure that gradually increases to correspond to an inclined surface of a bend introduced into the inner surface of the flange 200.

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