WO2014081112A1

WO2014081112A1 - Flange for connecting pipes

Info

Publication number: WO2014081112A1
Application number: PCT/KR2013/008124
Authority: WO
Inventors: 김종재
Original assignee: 주식회사 하이스텐
Priority date: 2012-11-26
Filing date: 2013-09-09
Publication date: 2014-05-30
Also published as: WO2014081114A2

Abstract

The present invention relates to a flange for connecting pipes, and more specifically, a flange according to the present invention is a device for providing a water-tight structure when a first pipe and a second pipe are coupled, and comprises: a body portion in which a first accommodation for accommodating one end of the first pipe and a second accommodation portion for accommodating one end of the second pipe are formed, so that a continuous flow path is formed by the first pipe and the second pipe; a packing portion, which is provided between the outer circumferential surface of the second pipe and the inner circumferential surface of the second accommodation portion, for forming the water-tight structure, wherein the packing portion comprises a body portion provided with a fluid accommodation portion for accommodating a fluid moving inside the first pipe and the second pipe, and a support portion, which is protrudingly formed on the body portion, for preventing the body portion from becoming twisted by coming into contact with the outer circumferential surface of the second pipe, when the body portion is twisted by means of friction with the second pipe.

Description

Pipe Flange

The present invention relates to a flange for pipe connection, and more particularly to a flange that provides an improved watertight structure when connecting the pipe.

In recent years, interest in water quality problems of tap water has increased, and the use of water pipes for stainless steel pipes, which are known to be most suitable for water quality, has been attracting attention due to the importance of water quality problems.

Water pipes buried underground to supply tap water must have corrosion resistance to protect the internal water quality, and require watertightness at the connection, separation prevention due to water pressure, convenience of construction, and structural stability to cope with changes in the external environment. do. Stainless steel pipes are known to have material properties that best match the requirements of these water pipes. In the case of small-diameter 13A (0.8T) to 50A (1.2T), the stainless steel pipe is made by inserting a rubber ring into the socket with the pipe end closed, pushing the pipe in, and pressing it with a mechanical force. It is possible to use 80A or more pipe thickness is 2.0T or more because it is impossible to press the field work, there is a problem to connect the pipe through the welding work. In this case, it is very difficult to weld and connect the pipe of 80A or more to the work site, which requires a skilled welding technician, and the work process is delayed.

On the other hand, a flange may be used to connect such a water pipe. The flange may be applied in such a way as to receive and fix the ends of the two water pipes to be connected. The flange forms a continuous flow path between the two water pipes so that the fluid can flow continuously. At this time, the flange should form a watertight structure to seal the connection with the water pipe.

The flange may have at least one packing to form such a watertight structure. In order to form a tight watertight structure, there should be strong adhesion between the packing and the water pipe, and there should be no gap between the packing and the water pipe. For this reason, it is not easy to install the packing on the outer circumferential surface of the water pipes in order to connect the water pipes, and it is necessary to use separate tools. In addition, the packing may be dried by friction with the water pipe while the water pipe is inserted into the packing. In this case, the packing may fail to maintain its normal shape and may be folded or flipped on the outer circumferential surface of the water pipe. The packing maintains its normal shape, providing a rigid watertight structure, and if the shape is deformed, fluid can flow out of the connection with the water pipe.

The present invention provides a flange having a packing capable of maintaining its shape by minimizing the phenomenon of drying by friction with the pipe during construction.

In another aspect, the present invention provides a pipe connecting means having an improved water-tight structure by maintaining the form even during construction or exposed to high pressure fluid.

Flange according to the present invention is a device for providing a watertight structure when the first pipe and the second pipe is fastened, the first receiving portion for receiving one end of the first pipe, the first pipe and the second pipe A body portion having a second receiving portion for receiving one end of the second pipe to form a continuous flow path; And a packing part disposed between an outer circumferential surface of the second pipe and an inner circumferential surface of the second receiving part to form a watertight structure, wherein the packing part accommodates fluid moving in the first pipe and the second pipe. A body portion in which a fluid receiving portion is formed; And a support part protruding from the body part, the body part being in contact with an outer circumferential surface of the second pipe when the body part is dried by friction with the second pipe to prevent the body part from being dried.

In addition, the body portion, a ring-shaped outer peripheral portion; And an inner circumference portion formed in a ring shape with one side connected to the outer circumference portion to form the fluid receiving portion between the outer circumference portion.

In addition, the support portion may be formed on the other side of the fluid receiving portion.

In addition, the support may be formed to protrude toward the second pipe.

In addition, the support portion may be formed of a material having a higher hardness than the body portion.

In addition, the packing part may be formed by double injection.

In addition, a first flow path groove is formed in the outer circumference portion, a second flow path groove is formed in the inner circumference portion, and when the second pipe is inserted into the body portion, the first flow path groove and the second flow path groove contact each other. The fluid receiving portion may be in communication.

According to the present invention, by providing a support part in the packing part, even when exposed to a high-pressure fluid environment when connected to a pipe or after installation, the shape of the packing can be maintained to provide a water-efficient structure of high efficiency.

In addition, according to the present invention, it is possible to install while maintaining the shape of the packing without a separate tool, the construction convenience in the field is increased, the construction speed is very fast compared with the existing construction quality is also excellent.

1 is a perspective view showing the appearance of the flange for pipe connection according to an embodiment of the present invention.

2 is a perspective view illustrating a partially cutaway view of a flange according to an embodiment.

3 is a cutaway perspective view illustrating a state of cut along a central axis of a flange according to an embodiment.

4 is a perspective view illustrating a state of a first packing according to an embodiment.

5 is a bottom perspective view illustrating a state of a first packing according to an embodiment.

6 is a cross-sectional view of the first packing according to one embodiment.

7 and 8 are schematic cross-sectional views showing the state when the first packing is inserted.

9 is a cross-sectional view illustrating a shape cut along a central axis of a flange according to an exemplary embodiment.

10 is a partial cutaway perspective view showing a state of a first packing according to another embodiment.

FIG. 11 is a cross-sectional view illustrating a shape cut along a central axis of the flange including the first packing of FIG. 10.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Unless otherwise defined or mentioned, terms indicating directions used in the present description are based on the states shown in the drawings. In addition, the same reference numerals throughout the embodiments indicate the same member. On the other hand, each of the components shown in the drawings may be exaggerated in thickness or dimensions for the convenience of description, and does not mean that actually should be configured by the ratio between the dimensions or configurations.

Referring to Figure 1 will be described with respect to the pipe connecting apparatus according to the present invention. 1 is a perspective view showing the appearance of the flange and the clamp for pipe connection according to an embodiment of the present invention.

The device for pipe connection according to the invention comprises a flange 20 and a clamp 10 as shown in FIG. 1. The flange 20 is a component that is fixed to one of the pipes by welding or the like by preliminary work or the like, and accommodates the ends of the other pipes to be connected to provide a watertight structure.

The clamp 10 is coupled to the flange 20 to perform a function of fixing the pipe inserted in the flange 20 so as not to leave. At this time, each of the pipes may be any one or end of the straight pipe, T-shaped or L-shaped pipe or valve, the present invention is not limited by the type of pipe. Each component is demonstrated concretely below.

Referring to Figures 2 and 3 will be described the overall appearance of the flange according to an embodiment. 2 is a perspective view illustrating a partially cutaway view of a flange according to an embodiment, and FIG. 3 is a perspective view illustrating a cutaway view along a central axis of a flange according to an embodiment.

Referring to FIG. 2, the flange 20 according to the present embodiment includes packings 250 forming a watertight structure between the housing 200 and the pipe receiving the housing 200 forming the outer housing.

The housing 200 is formed in a hollow tubular shape as shown in FIGS. 2 and 3. On the inner circumferential surface of the housing 200, a first packing accommodating part 201, a second packing accommodating part 202, and an insertion limiting part 205 are formed from the top with reference to FIG. 2.

The first packing accommodating part 201 is formed of a predetermined space part formed by protruding outward from the other inner circumferential surface of the housing 200. The first packing accommodating part 201 accommodates the first packing 260 which will be described later and fixes the inner packing surface of the housing 200.

The second packing accommodating part 202 is formed as a space between the first protrusion 202 and the second protrusion 204 protruding inwardly and circumferentially surrounding the inner circumferential surface of the housing 200. The second packing accommodating part 202 accommodates a second packing 270 to be described later and is fixed on the inner circumferential surface of the housing 200.

The insertion limiting portion 205 is a component that limits the insertion depth of the pipe inserted in the direction of the second packing receiving portion 202 from the first packing receiving portion 201 side. Insertion restriction portion 205 is formed around the inner circumferential surface of the housing 200 and protrudes inwardly. On the other hand, the inner end of the insertion limiting portion 205 may be further formed with an extension portion 206 protruding upward along the central axis direction. The extension part 206 functions to limit the movement of the pipe to be inserted or to prevent the third packing 280 provided between the pipe and the pipe.

In addition, a hook-shaped first fixing protrusion 220 may be formed at an upper end of the housing 200, that is, at an end portion of a side into which the pipe enters.

Meanwhile, hereinafter, as illustrated in FIG. 3, a section in which the pipe 1 is inserted and accommodated in the housing 200 is called a first accommodating part P1 for convenience of description. In addition, a portion in which the other pipe connected to the pipe 1 is received and fixed is called a second accommodation portion P2. In this case, the other pipe may be fixed by welding to the weld 209 provided at the end of the second accommodating part P2. However, the flange according to the present invention can use all existing pipe fastening methods such as a screw fastening method as well as such a welding method.

As shown in FIG. 2, the second packing 270 is formed in a ring shape. In this case, the inner circumferential surface of the second packing 270, that is, the surface in contact with the pipe may be formed as a curved surface. The third packing 280 is formed in a ring shape. In addition, the third packing 280 is formed with an end packing portion 281 extending inward from one end, the cross-sectional shape is formed in an L-shape. The end packing portion 281 is in contact with the end of the pipe described above to form a watertight structure.

The first packing 260 is a main component forming the watertight structure of the flange according to this embodiment. The first packing 260 may have a fluid receiving portion formed therein to accommodate a portion of the fluid flowing between both pipes to be connected. Hereinafter, the first packing 260 will be described in detail.

A first packing according to an embodiment will be described with reference to FIGS. 4 through 8. 4 is a perspective view illustrating a first packing according to an embodiment, and FIG. 5 is a bottom perspective view illustrating a first packing according to an embodiment. 6 is a cross-sectional view of the first packing according to an embodiment, and FIGS. 7 and 8 are schematic cross-sectional views showing a state when the first packing is inserted.

Referring to FIG. 4, the first packing 260 is formed in a ring shape as a whole. The first packing 260 includes an inner circumferential portion 261 forming an inner circumferential surface of the first packing 260 and an outer circumferential portion 262 forming an outer circumferential surface of the first packing 260. The inner circumference portion 261 and the outer circumference portion 262 are each formed in a ring shape, and one side is connected to form a fluid receiving portion 265 which is a constant space between the inner circumference portion 261 and the outer circumference portion 262.

Flow path grooves 266 are formed at ends of the inner circumference portion 261 and the outer circumference portion 262, respectively. The flow path groove 266 is formed in a groove shape from the ends of the inner circumference portion 261 and the outer circumference portion 262 toward the fluid receiving portion 265 described above. At this time, the flow path grooves formed in the inner circumference portion 261 and the outer circumference portion 262 are preferably formed at positions facing each other. That is, when the end of the inner circumference portion 261 and the outer circumference portion 262 abuts, the flow path groove 266 formed in the inner circumference portion 261 and the flow path groove 266 formed in the outer circumference portion 262 abut each other to form one flow path. It is desirable to. In addition, an independent flow path may be formed in each of the inner circumference portion 261 and the outer circumference portion 262. The flow path grooves 266 may be formed in at least one pair corresponding to each other and the ends of the inner circumference portion 261 and the outer circumference portion 262.

Referring to FIG. 5, the support part 263 is formed on the bottom of the first packing 260 in the drawing. The support portion 263 extends from the portion where the inner circumference portion 261 and the outer circumference portion 262 are connected. The support part 263 finally protrudes toward the central axis of the first packing 260.

6, the fluid receiving portion 265 is formed between the inner circumference portion 261 and the outer circumference portion 262, and the inner circumference portion 261 and the outer circumference portion 262 can be seen. The first flow path grooves 266b and the second flow path grooves 266a are formed from the ends of the toward the fluid receiving portion 265. As described above, the first flow path groove 266b and the second flow path groove 266a form a single flow path even when the inner circumference portion 261 and the outer circumference portion 262 contact each other to form the flow path from the outside into the fluid receiving portion 265. Allow fluid to enter.

The support part 263 is provided on the other side of the direction in which the fluid receiving part 265 is opened. The support portion 263 is formed of a material different from the inner circumference portion 261 and the outer circumference portion 262. In particular, the support portion 263 is preferably formed of a material having a greater hardness, that is, hardness than the inner circumference portion 261 and the outer circumference portion 262. Such a double material structure may be implemented by a method such as double injection.

Referring to FIG. 7, when the flange and the pipe 1 are connected, the pipe 1 is inserted into the first packing 260. In this case, the inner circumferential portion 261 is folded toward the outer circumferential portion 262 so that the end portions of the inner circumferential portion 261 and the outer circumferential portion 262 are in contact with each other. Even in this case, the fluid receiving portion 265 inside the first packing 260 is maintained as a constant space. At this time, the end portion 2263 of the support portion 263 is preferably formed to maintain a constant distance from the pipe (1). As described above, the interface 2632 between the support portion 263 and the inner circumference portion 261 or the support portion 263 and the outer circumference portion 262 is in a state of being firmly connected by a method such as double injection.

Meanwhile, if there is no friction force between the pipe 1 and the first packing 260, the first packing 260 may be installed while maintaining a normal shape as shown in FIG. 7. However, the first packing 260 and the pipe 1 should be in close contact and free of play for a firm watertight structure, and the pipe 1 should be pressurized by the first packing 260. Therefore, a very large friction force is generated between the first packing 260 and the pipe 1, and as a result, when the pipe 1 is inserted into the first packing 260, the first packing as shown in FIG. The phenomenon in which the 260 curls may occur. That is, during installation, the inner circumference 261 receives a force in a direction opposite to the direction D1 in which the first packing 260 proceeds, that is, in the direction in which the pipe 1 is inserted, by the frictional force with the pipe 1. The outer circumferential portion 262 is subjected to an external force to proceed in the D1 direction, but the inner circumferential portion 261 is subjected to a force in the reverse direction of D1 by the frictional force with the pipe 1, so that the first packing 260 is counterclockwise in the cross-sectional view. You will continue to receive a rotating force.

Under such circumstances, the first packing 260 may be installed in an abnormal shape without maintaining a normal shape, such as curling or folding of a portion of the first packing 260. This shape deformation may also occur when the pressure of the fluid flowing inside after the pipe and flange connection is increased.

As such, when the first packing 260 is deformed when the pipe 1 is connected to the pipe 1, the end portion 2263 of the support part 263 comes into contact with the pipe 1. The first packing 260 resists the force that the first packing 260 rolls in the counterclockwise direction with the end portion 2263 of the support portion 263 in contact with the pipe 1. As a result, the first packing 260 can be prevented from rolling in the counterclockwise direction within the firmness limit of the support part 263.

As described above, the support portion 263 may be formed of a material having a higher hardness than the inner circumference portion 261 and the outer circumference portion 262. As the hardness of the support portion 263 increases, even when the inner circumference portion 261 and the outer circumference portion 262 are deformed, the opposing force against the deformation of the support portion 263 becomes higher, and the first packing 260 is normal. Support to maintain shape.

The function and operation of the flange according to an embodiment will be described with reference to FIG. 9. 9 is a cross-sectional view illustrating a shape cut along a central axis of a flange according to an exemplary embodiment.

When the fluid pressure in the pipe 1 rises, the fluid flows outward through the end of the pipe 1 in the direction D2 of the pipe 1, and then the outer circumferential surface of the pipe 1 and the housing 200 of the flange are discharged. Proceeding between the inner circumferential surfaces, the first packing 260 is reached through the third packing 280 and the second packing 270. As described above, the fluid may be introduced into the fluid receiving part 265 through a flow path formed by the first flow path groove 266b and the second flow path groove 266a contacting each other.

As such, the third packing 280 and the second packing 270 sequentially form a watertight structure, and when a relatively large pressure occurs, such as when the pressure of the fluid increases momentarily, the first packing 260. ) Can maintain the watertight structure. That is, when a weak water shock or a low fluid pressure occurs, the second packing 270 and the third packing 280 correspond to maintain a watertight structure, and when a high water shock or a high fluid pressure occurs, 1 packing 260 correspondingly maintains the watertight structure.

Meanwhile, as described above, shape deformation of the first packing 260 may occur even under conditions of high fluid pressure. Even in this case, the shape of the first packing 260 may be prevented from being deformed by the support part 263.

10 and 11, a first packing according to another embodiment will be described. FIG. 10 is a partially cutaway perspective view illustrating a first packing according to another embodiment, and FIG. 11 is a cross-sectional view illustrating a flange cut along the central axis of the flange including the first packing of FIG. 10.

When compared with the first packing described above, the first packing 260a according to the present embodiment has a difference in that one more fluid receiving part is provided. That is, the first packing 260a according to the present embodiment may have a second fluid receiving part communicating with the outside through a separate second flow path 268 in addition to the fluid receiving part 265 communicating with the outside through the flow path 266. 267.

As shown in FIG. 11, when the fluid pressure in the pipe 1 rises, the fluid flows out through the end of the pipe 1 in the outward direction D2 of the pipe 1, and then with the outer circumferential surface of the pipe 1. Proceeding between the inner circumferential surfaces of the flange 200, the first packing 260a is reached through the third packing 280 and the second packing 270. Thereafter, some of the fluid may be introduced into the fluid receiving part 265 through the flow path 266, and some of the fluid may be introduced into the second fluid receiving part 267 through the second flow path 268.

As such, when the third packing 280 and the second packing 270 sequentially form a watertight structure, and when a relatively large pressure occurs such as when the pressure of the fluid increases momentarily, the first packing 260a ) Can maintain the watertight structure. That is, when a weak water shock or a low fluid pressure occurs, the second packing 270 and the third packing 280 correspond to maintain a watertight structure, and when a high water shock or a high fluid pressure occurs, 1 packing 260a corresponds to maintain the watertight structure. In this case, the shape of the first packing 260a may be further modified under the conditions of the same fluid pressure as compared with the above-described embodiment in view of the additional fluid receiving portion. Even in this case, it is possible to prevent the shape of the first packing 260a from being deformed by the support 263.

Although the preferred embodiment of the present invention has been described above, the technical idea of the present invention is not limited to the above-described preferred embodiment, and various flanges for pipe connection within the scope not departing from the technical idea of the present invention specified in the claims. It can be implemented as.

Claims

An apparatus for providing a watertight structure when the first pipe and the second pipe are fastened,

A housing including a first accommodating part accommodating an end of the first pipe and a second accommodating part accommodating an end of the second pipe such that the first pipe and the second pipe form a continuous flow path. 200); And

And a packing part 250 provided between an outer circumferential surface of the second pipe and an inner circumferential surface of the second receiving part to form a watertight structure.

The packing unit,

Body parts (261, 262) is formed in the fluid receiving portion for receiving the fluid moving in the first pipe and the second pipe; And

Extends from an outer diameter side of one end of the body portion to protrude toward an adjacent point among the central axes of the second pipe, and contacts the outer circumferential surface of the second pipe when the body portion is dried by friction with the second pipe; And a support (263) portion to prevent the body portion from curling.
The method of claim 1,

The body portion,

A ring-shaped outer periphery 262; And

And an inner circumference portion (261) having one side connected to the outer circumference portion to form the fluid receiving portion between the outer circumference portion.
The method of claim 2,

The support portion is a flange formed on the other side of the fluid receiving portion.
The method of claim 1,

And the support portion is formed to protrude toward the second pipe.
The method of claim 1,

The support portion is a flange formed of a material having a higher hardness than the body portion.
The method of claim 1,

The packing part is a flange formed by double injection.
The method of claim 1,

A first flow path groove is formed in the outer circumference portion, a second flow path groove is formed in the inner circumference portion, and when the second pipe is inserted into the body portion, the first flow path groove and the second flow path groove contact each other. A flange forming a flow path for communicating the fluid receiving portion.