KR20140085042A - Device for connecting pipe - Google Patents

Device for connecting pipe Download PDF

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Publication number
KR20140085042A
KR20140085042A KR1020120155180A KR20120155180A KR20140085042A KR 20140085042 A KR20140085042 A KR 20140085042A KR 1020120155180 A KR1020120155180 A KR 1020120155180A KR 20120155180 A KR20120155180 A KR 20120155180A KR 20140085042 A KR20140085042 A KR 20140085042A
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KR
South Korea
Prior art keywords
pipe
connection
flange portion
metal
gasket
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KR1020120155180A
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Korean (ko)
Inventor
영 식 김
박성기
Original Assignee
대림켐 주식회사
주식회사 대연
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Application filed by 대림켐 주식회사, 주식회사 대연 filed Critical 대림켐 주식회사
Priority to KR1020120155180A priority Critical patent/KR20140085042A/en
Publication of KR20140085042A publication Critical patent/KR20140085042A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/0072—Joints for pipes of dissimilar materials

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

According to the present invention, a pipe connecting device to combine a synthetic resin pipe and a metal pipe composition includes a synthetic resin connector, a metal connector, a gasket, a compression flange, and a fixing device. The synthetic resin connector has a first connecting pipe, a first flange part which is placed in the end of the first connecting pipe and has a diameter bigger than that of the first connecting pipe, and a first connecting flow path which is prepared to pass through the middle of the first connecting pipe and the first flange part. The metal connector has a second connecting pipe, a second flange part which is placed in the end of the second connecting pipe and has a diameter bigger than that of the second connecting pipe, and a second connecting flow path which is prepared to pass through the middle of the second connecting pipe and the second flange part. The gasket is placed between the first flange part of the synthetic resin connector and the second flange part of the metal connector, and the compression flange is coupled to the synthetic resin connector to be adhered to an opposite side of surface facing the gasket of the first flange part. The fixing device has multiple fixing bolts and nuts which are to apply welding force to the second flange of the metal connector and the compression flange for the two to approach each other.

Description

Device for connecting pipe

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting apparatus, and more particularly, to a pipe connecting apparatus capable of rigidly connecting a synthetic pipe and other metal pipe structures such as a metal pipe or a metal valve.

Generally, piping is used as a water supply line or a refueling line of various facilities ranging from a home to an industrial facility of various industrial sites. These pipes consist of a number of pipes connecting the supply points to the supply points of the fluid.

The plurality of pipes constituting the pipe are continuously connected by various pipe connecting devices. Between the pipe and the pipe, various valves are installed to control the flow of the fluid. At the site of actual piping work, pipes of a certain length are sequentially buried, and each pipe is connected to each pipe connection device to complete the piping.

In recent years, regulations for the tolerance of metal harmful substances have been strengthened in the pipe for supplying water. The use of metal pipes is restricted as the allowable limit value for metal harmful substances such as lead and cadmium is lowered in pipes for supplying water. In particular, copper (brass) materials, which have been used as main materials for metal pipes, have faced the reality that they are no longer usable due to the strengthened regulations.

As an alternative to this, a method of constructing a pipe by using a pipe made of a metal which is less liable to dissolve harmful substances such as stainless steel has been proposed. However, in this case, there is a problem in that economical efficiency can not be satisfied.

As another alternative to such a metal pipe, synthetic resin pipes are attracting attention. The synthetic resin pipe is advantageous in that there is no leaching of harmful substances, molding is relatively easy, and the price is low. However, since the synthetic resin pipe can not be connected by applying the conventional connection method used for connecting metal pipes such as welding, the pipe connection device for a synthetic resin pipe has various structures have.

Korean Registered Utility Model No. 0220029 (registered on January 31, 2001), Korean Registered Utility Model No. 0377341 (registered on Feb. 21, 2005), Korean Registered Utility Model No. 0288648 (registered on Aug. 29, 2002)

In constructing the piping by connecting the synthetic resin pipes, the entire piping line can not be composed of the piping constituted by the synthetic resin. Essentially, the piping constituted by the metal such as the metal pipe or the metal valve should be connected to the synthetic pipe.

However, since the synthetic resin pipe is relatively weak in strength compared to the metal pipe structure, care must be taken to prevent the synthetic resin pipe from being broken during the connection. Also, since the specification of the synthetic resin pipe is different from the specification of the metal pipe component such as the metal pipe or the metal valve, the pipe connection device for connecting them must be designed to have a structure capable of overcoming the difference in specification.

It is an object of the present invention to provide a pipe connection device capable of firmly coupling a synthetic pipe and a metal pipe component such as a metal pipe or a metal valve without damaging the synthetic pipe.

According to another aspect of the present invention, there is provided a pipe connecting apparatus for connecting a synthetic resin pipe with a metal pipe constituent, the pipe connecting apparatus comprising a synthetic resin connection port, a metal connection port, a gasket, a reinforcing flange and a fixing mechanism. A first connection pipe having a shape corresponding to an end of the synthetic resin pipe so that one end of the synthetic resin pipe is formed of a synthetic resin and the other end of the synthetic pipe has a shape corresponding to an end of the synthetic pipe, And a first flange portion provided to have a diameter larger than the diameter of the first connection pipe, and a second flange portion provided to penetrate through the center of the first connection pipe and the first flange portion to be connected to the internal flow path of the synthetic resin pipe. And a plurality of bolt engagement holes formed in the first flange portion and spaced apart from each other along the circumference of the first connection passage. A second connection pipe having a metal connection port formed of a metal and having a shape corresponding to an end of the metal pipe structure so that one end of the metal connection pipe can be coupled to an end of the metal pipe connection structure; A second flange portion provided at an end of the second connection pipe so as to have a diameter larger than the diameter of the second connection pipe and a second flange portion extending through the center of the second connection pipe and the second flange portion And a plurality of bolt coupling holes formed in the second flange portion so as to be spaced along the circumference of the second connection passage. The gasket is interposed between the first flange of the synthetic resin connector and the second flange of the metal connector for sealing between the synthetic resin connector and the metal connector, And a plurality of bolt engagement holes formed along the circumference of the passage. The reinforcing flange is coupled to the synthetic resin connector so that the reinforcing flange can be brought into close contact with the surface of the first flange portion opposite to the surface facing the gasket and has a through hole through which the first connecting pipe can be inserted and a through hole And has a plurality of bolt engagement holes formed spaced apart from each other. The fixing mechanism applies a pressing force to the second flange portion of the metal connection port and the reinforcing flange in a direction in which the second flange portion and the reinforcing flange of the metal connection port are close to each other, A fixing bolt which is engaged with a bolt fitting hole of the second flange portion, a bolt fitting hole of the gasket, a bolt fitting hole of the second flange portion, and a bolt fitting hole of the reinforcing flange, And a nut screwed to an end of the nut.

Wherein at least one of the one surface of the first flange portion in contact with the gasket and the one surface of the second flange portion in contact with the gasket is provided with a gasket which is provided on the first connection passage and the second connection passage, An escaping groove can be provided in which the expanded portion of the gasket can be press-fitted when the gasket is expanded in the thickness direction while being compressed by the gasket.

The escape groove is formed in a ring shape around the first connection passage on one surface of the first flange portion. The depth of the escape groove gradually becomes deeper toward the edge of the first flange portion in the first connection passage .

The escape groove is formed in a ring shape around the second connection passage on one side of the second flange portion. The depth of the escape groove gradually becomes deeper from the second connection passage toward the edge of the second flange portion .

Wherein the synthetic resin connection port is provided in the form of a ring having an outer diameter larger than an outer diameter of the first connection pipe and smaller than an outer diameter of the first flange portion around the first connection pipe, And a reinforcing portion surrounding the outer connection portion of the first connector.

Wherein the metal connection port is provided in the form of a ring having an outer diameter larger than an outer diameter of the second connection pipe and smaller than an outer diameter of the second flange portion around the second connection pipe, And a reinforcing portion surrounding the outer connection portion of the first connector.

Wherein the diameter of the second connection passage of the metal connection port is larger than the diameter of the first connection passage of the synthetic resin connection port and the diameter of the passage of the gasket is equal to the diameter of the second connection passage of the metal connection port, The inclined guide portion having a shape gradually decreasing in diameter from the first flange portion toward the inside of the first flange portion is provided on one side of the first flange portion on one side of the first flange portion, And the innermost diameter of the inclined guide portion may be the same as the diameter of the first connection passage.

The pipe connecting device according to the present invention is characterized in that a synthetic pipe is connected to a synthetic resin connection port and a metal pipe component such as a metal pipe or a metal valve is connected to a metal connection port and then a synthetic resin connection port and a metal connection port are connected to each other through a gasket, It is possible to firmly connect the synthetic resin pipe and the metal pipe construction having different specifications to each other without generating a gap.

1 is an exploded perspective view showing a pipe connecting apparatus according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a state in which a synthetic resin pipe and a metal pipe are connected using a pipe connecting device according to an embodiment of the present invention.

Hereinafter, a pipe connecting apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, the sizes and shapes of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation. In addition, the terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. These terms are to be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the contents throughout the present specification.

FIG. 1 is an exploded perspective view illustrating a pipe connecting apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view illustrating a state in which a synthetic resin pipe and a metal pipe are connected using a pipe connecting apparatus according to an embodiment of the present invention .

1 and 2, the pipe connecting apparatus 10 according to an embodiment of the present invention includes a synthetic resin connection port 11 formed of a synthetic resin so as to be coupled to the synthetic resin pipe 50, A gasket 13 interposed between the synthetic resin connector 11 and the metal connector 12 and a reinforcing flange 14 coupled to the synthetic resin connector 11, And a fixing mechanism 15 for fixing the synthetic resin connector 11 and the metal connector 12. The pipe connection apparatus 10 according to the present invention is configured such that the synthetic resin connection port 11 to which the synthetic resin pipe 50 is coupled and the metal connection port 12 to which the metal pipe 55 is coupled are coupled by the fixing mechanism 15, The synthetic resin pipe 50 and the metal pipe 55 can be firmly connected.

The synthetic resin connector 11 includes a first connection pipe 20, a first flange portion 21 provided at an end of the first connection pipe 20, a first connection pipe 20 and a first flange portion 21 And a first connection passage 22 provided so as to pass through the center of the first connection passage 22. A plurality of bolt engagement holes 23 are formed around the first connection passage 22 of the first flange portion 21 so as to be spaced from each other.

The first connection pipe 20 has a shape corresponding to the end of the synthetic resin pipe 50 so that one end of the first connection pipe 20 can be coupled to the end of the synthetic resin pipe 50. As shown in the figure, when the synthetic resin pipe 50 is in the shape of a circular hollow pipe, one end of the first connecting pipe 20 is connected to the synthetic resin pipe 50 so as to be stably coupled to the end of the synthetic resin pipe 50, And has a hollow tube shape having an outer diameter and an inner diameter corresponding to the outer diameter and the inner diameter.

The first connection pipe 20 may be joined to the synthetic resin pipe 50 by various methods such as welding. The diameter of the first connection passage 22 formed in the first connection pipe 20 is set to be larger than the diameter of the first connection pipe 20 formed in the synthetic resin pipe 50 The diameter of the inner passage may be set so that the first connection pipe 20 and the synthetic resin pipe 50 do not have a step at the connection portion between the first connection pipe 20 and the synthetic resin pipe 50, The fluid can be stably flowed from the first connecting pipe 20 toward the first connecting pipe 20.

The first flange portion 21 is provided at the other end of the first connection pipe 20 so as to have a larger diameter than the diameter of the first connection pipe 20. A first connecting flow path 22 extending from the first connecting pipe 20 is provided at the center of the first flange portion 21 and a plurality of first connecting flow paths 22 are formed around the first connecting flow path 22 of the first flange portion 21. [ A bolt fitting hole 23 is formed. One surface of the first flange portion 21 in contact with the gasket 13 is flat so as to stably adhere to the gasket 13 and the inclined guide portion 24 and the plurality of escape grooves 25 are provided .

The inclined guide portion 24 is for guiding the flow of the fluid from the synthetic resin connector 11 to the metal connector 12 or from the metal connector 12 to the synthetic resin connector 11, The first flange portion 21 has a diameter gradually decreasing from the outer surface of the first flange portion 21 toward the inside thereof around the first connection passage 22 on one side of the flange portion 21. [ The specifications of the metal piping components such as commercialized metal pipes and metal valves are different from those of the synthetic resin pipes. Compared with the most similar standard metal pipe construction and synthetic pipe, it is common that the diameter of the synthetic pipe is small. For this reason, the diameter of the first connection passage 22 of the synthetic resin connection port 11 is formed to be smaller than the diameter of the second connection passage 32 of the metal connection port 12. The diameter of the connection passage 22 (32) If this difference is generated, a step is formed at a connection portion between the synthetic resin connector 11 and the metal connector 12, and a turbulent flow occurs when the fluid flows through the synthetic connector connector 11 and the metal connector 12, thereby causing a problem of fluid flow.

Therefore, the inclined guide portion having the shape gradually decreasing in diameter while moving toward the inside of the first flange portion 21 around the first connection passage 22 on the one surface side of the first flange portion 21 contacting with the gasket 13 The outermost diameter of the inclined guide portion 24 is set equal to the diameter of the second connection passage 32 of the metal connection port 12 and the diameter of the passage 36 of the gasket 13, When the innermost diameter of the first connection channel 24 is made equal to the diameter of the first connection channel 22, it is possible to avoid a problem of a step at a connection portion between the synthetic resin connection port 11 and the metal connection port 12. [ The fluid can smoothly flow from the synthetic resin connector 11 to the metal connector 12 or from the metal connector 12 to the synthetic resin connector 11 without turbulence. The inclined guide portion 24 can be formed by chamfering an inner corner portion of the first flange portion 21 where the first connection channel 22 is formed.

The plurality of escape grooves 25 are formed in a ring shape on one surface of the synthetic resin connection port 11 which is in contact with the gasket 13 of the first flange portion 21 and are disposed concentrically around the first connection passage 22 . The escape groove 25 is formed in such a manner that when the gasket 13 made of an elastic material receives pressure in the radial direction by the fluid flowing along the first connection passage 22 and the second connection passage 32 and expands in the thickness direction, (13) is press-fitted. It is possible to prevent the gasket 13 from being excessively pushed outward in the radial direction when the gasket 13 which receives pressure in the radial direction by the fluid is partially pressed into the escape groove 25 while expanding in the thickness direction The sealing area of the gasket 13 can be increased, and the sealing effect of the gasket 13 can be improved.

The escape groove 25 may be formed such that its depth gradually increases from the first connection passage 22 toward the edge of the first flange portion 21. [ When the escape groove 25 is formed in this shape, the gasket 13 that expands while receiving pressure from the inside to the outside can be more smoothly press-fitted into the escape groove 25.

In addition, a reinforcing portion 26 for reinforcing the strength is provided on one side of the first connection pipe 20 of the synthetic resin connector 11. The reinforcing portion 26 is provided around the first connecting pipe 20 in a ring shape having an outer diameter larger than the outer diameter of the first connecting pipe 20 and smaller than the outer diameter of the first flange portion 21, And surrounds the outer connecting portion between the connecting pipe (20) and the first flange portion (21). Since the diameter of the first flange portion 21 is larger than the diameter of the first connection pipe 20, the reinforcing portion 26 is formed to extend from the outer surface of the first flange portion 21 toward the outer peripheral surface of the first connecting pipe 20 It is preferable that the diameter is gradually decreased.

1 and 2, the metal connector 12 includes a second connecting pipe 30, a second flange 31 provided at an end of the second connecting pipe 30, And a second connection passage 32 provided so as to pass through the center of the pipe 30 and the second flange portion 31. A plurality of bolt engagement holes 33 are formed to be spaced apart from each other around the second connection passage 32 of the second flange portion 31.

The second connection pipe 30 has a shape corresponding to the end of the metal pipe 55 so that one end of the second connection pipe 30 can be coupled to the end of the metal pipe 55. As shown in the figure, when the metal pipe 55 has a circular hollow pipe shape, one end of the second connecting pipe 30 is connected to the metal pipe 55 so as to be stably coupled to the end of the metal pipe 55, And has a hollow tube shape having an outer diameter and an inner diameter corresponding to the outer diameter and the inner diameter.

The second connection pipe 30 may be coupled with the metal pipe 55 by various methods such as welding. The diameter of the second connection passage 32 formed in the second connection pipe 30 is set to be larger than the diameter of the second connection pipe 32 formed in the metal pipe 55 The diameter of the inner passage may be set so that no step is formed at the connection portion between the second connection pipe 30 and the metal pipe 55 so that the second connection pipe 30 extends from the second connection pipe 30 toward the metal pipe 55, It is possible to stably flow the fluid to the second connecting pipe 30 side.

The second flange portion 31 is provided at the other end of the second connection pipe 30 so as to have a larger diameter than the diameter of the second connection pipe 30. A second connecting flow path 32 extending from the second connecting pipe 30 is provided at the center of the second flange portion 31 and a plurality of second connecting flow paths 32 are formed around the second connecting flow path 32 of the second flange portion 31. [ Bolt engagement holes 33 are formed to be spaced apart from each other. One surface of the second flange portion (31) that contacts the gasket (13) is flattened so as to stably adhere to the gasket (13).

A reinforcing portion 34 for reinforcing the strength is provided on one side of the second connection pipe 30 of the metal connector 12. The reinforcing portion 34 is provided around the second connecting pipe 30 in a ring shape having an outer diameter larger than the outer diameter of the second connecting pipe 30 and smaller than the outer diameter of the second flange 31, And surrounds the outer connecting portion between the connecting pipe 30 and the second flange portion 31. Since the diameter of the second flange portion 31 is larger than the diameter of the second connection pipe 30, the reinforcing portion 34 is extended from the outer surface of the second flange portion 31 toward the outer peripheral surface of the second connection pipe 30 It is preferable that the diameter is gradually decreased.

The gasket 13 is interposed between the flat first flange portion 21 of the synthetic resin connector 11 and the flat second flange portion 31 of the metal connector 12 to form a gap between the synthetic resin connector 11 and the metal connector 12 . The gasket 13 is provided at its center with a passage 36 for connecting the first connection passage 22 of the synthetic resin connection port 11 and the second connection passage 32 of the metal connection port 12, A plurality of bolt engagement holes 37 are formed to be spaced apart from each other. The diameter of the passage 36 is equal to the diameter of the second connection passage 32 so as not to generate a step between the metal connection port 12 and the second connection passage 32. The gasket 13 is tightly adhered to a flat one face of the first flange portion 21 and a flat face of the second flange portion 31 to stably seal the first flange portion 21 and the second flange portion 31 And is made of an elastically deformable material.

The reinforcing flange 14 is joined to the synthetic resin connector 11 so as to be brought into close contact with the surface of the first flange portion 21 opposite to the surface facing the gasket 13. The reinforcing flange 14 has a through hole 40 into which the first connecting pipe 20 can be inserted and a donut shape having a plurality of bolt fitting holes 41 formed to be spaced apart around the through hole 40 Lt; / RTI > The reinforcing flange 14 is formed so that the pressing force of the fixing mechanism 15 is applied to the synthetic resin connector 11 when the synthetic resin connector 11 is pressed toward the metal connector 12 by the fixing mechanism 15 and is engaged with the metal connector 12. [ The first flange portion 21 of the synthetic resin connector 11 can stably adhere to one surface of the gasket 13 with a uniform pressure as a whole . The reinforcing flange 14 is made of a material having an appropriate level of rigidity so as to uniformly press the outer side of the first flange portion 21 such as metal or synthetic resin as a whole.

The fixing mechanism 15 includes a plurality of fixing bolts 45 and a plurality of nuts 46 screwed to the plurality of fixing bolts 45. The plurality of fixing bolts 45 are formed so that the second flange portion 31, the gasket 13, the first flange portion 21 and the reinforcing flange 14 are engaged with the bolt engagement holes 33, 37, The nuts 46 are inserted into the bolt engagement holes 33, 37, 23 and 41 in this order in order so that the ends of the fixing bolts 45 project from the reinforcing flange 14, As shown in Fig. The distance between the second flange portion 31 of the metal connector 12 and the reinforcing flange 14 is narrowed by the screwing of the fixing bolt 45 and the nut 46, The gasket 13, the first flange portion 21 and the reinforcing flange 14 are pressed against each other to securely fix these components. Of course, the fixing bolt 45 may be inserted into the bolt fitting hole 41 of the reinforcing flange 14 and protrude toward the bolt fitting hole 33 of the second flange portion 31.

As described above, the pipe connecting apparatus 10 according to the present invention includes a synthetic resin pipe connecting member 11, a synthetic pipe connecting member 11, a synthetic resin pipe connecting member 11, a metal pipe connecting member 12, The synthetic resin pipe 50 and the metal pipe 55 having different specifications are firmly coupled with each other without generating a gap by fixing the metal pipe 12 and the metal pipe 12 with the fixing mechanism 15 with the gasket 13 interposed therebetween. can do. The pipe connection device 10 according to the present invention can be connected to the metal connection pipe 12 through a metal pipe 55 other than the metal pipe 55, Can be used to couple the construct to the synthetic resin pipe (50). Also, the synthetic resin pipe and the metal pipe construction may be combined by first connecting the synthetic resin connector 11 and the metal connector 12, and then connecting a synthetic pipe to the synthetic resin connector and a metal pipe structure to the metal connector.

In the present invention, the concrete structure and shape of the synthetic resin connector 11, the metal connector 12, the gasket 13 and the reinforcing flange 14 are not limited to those shown and can be variously changed. For example, the escape groove 25 may be formed in the metal connection port 12, or may be formed in both the synthetic resin connection port 11 and the metal connection port 12, and the shape thereof may be changed to a shape other than the ring shape. The fixing mechanism 15 is connected to the second flange portion 31 of the metal connector 12 and the reinforcing flange 14 in a direction in which the fixing flange portion 31 and the reinforcing flange 14 are close to each other in addition to the structure including the fixing bolt 45 and the nut 46 It can be changed to another structure that can be pressurized.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and modify the technical idea of the present invention in various forms. Accordingly, these modifications and variations are intended to fall within the scope of the present invention as long as it is obvious to those skilled in the art.

10: pipe connector 11: synthetic resin connector
12: metal connector 13: gasket
14: Reinforcing flange 15: Fixing device
20, 30: first and second connecting pipes 21, 31: first and second flange portions
22, 32: first and second connecting flow paths 23, 33, 37, 41: bolt connecting hole
24: inclined guide portion 25: escape groove
26, 34: reinforcing portion 36: passage
40: Through hole 45: Fixing bolt
46: Nuts

Claims (7)

A pipe connecting device for connecting a synthetic pipe and a metal pipe arrangement,
A first connection pipe made of a synthetic resin and having a shape corresponding to an end of the synthetic pipe so that one end of the synthetic pipe is connected to an end of the synthetic pipe; A first connection channel provided so as to pass through the center of the first connection pipe and the first flange to be connected to the inner flow path of the synthetic resin pipe, A synthetic resin connector having a plurality of bolt-fitting holes formed in the first flange portion so as to be spaced apart from each other along the circumference of the first connection passage;
A second connection pipe made of metal and having a shape corresponding to an end of the metal pipe structure so that one end of the metal pipe structure can be coupled to the end of the metal pipe structure; A second flange portion provided so as to have a diameter larger than the diameter of the second connection pipe and a second flange portion provided to penetrate through the center of the second connection pipe and the second flange portion to be connected to the inner flow path of the metal pipe structure, A metal connection port having a connection channel and a plurality of bolt engagement holes formed in the second flange part along the periphery of the second connection channel;
A second flange portion of the synthetic resin connection port and a second flange portion of the metal connection port for sealing between the synthetic resin connection port and the metal connection port, A gasket having a plurality of bolt engagement holes spaced apart from each other around the passage;
A through hole through which the first connection pipe can be inserted and a second through hole formed along the periphery of the through hole, the synthetic resin connection port being formed to be in contact with the surface of the first flange portion opposite to the surface facing the gasket, A reinforcing flange having a plurality of bolt-fitting holes to be engaged; And
A pressing force is applied to the second flange portion of the metal connection port and the reinforcing flange in a direction approaching each other so that the second flange portion, the gasket, the first flange portion of the synthetic resin connection port, and the reinforcing flange are pressed against each other A bolt engaging hole of the second flange portion, a bolt engaging hole of the gasket, a bolt engaging hole of the second flange portion, and a bolt engaging hole of the reinforcing flange, And a fixing mechanism having a nut to be threaded.
The method according to claim 1,
Wherein at least one of the one surface of the first flange portion in contact with the gasket and the one surface of the second flange portion in contact with the gasket is provided with a gasket which is provided on the first connection passage and the second connection passage, Wherein an escape groove is provided in which the expanded portion of the gasket can be press-fitted when the gasket is expanded in the thickness direction while being compressed by the gasket.
3. The method of claim 2,
The escape groove is formed in a ring shape around the first connection passage on one surface of the first flange portion. The depth of the escape groove gradually becomes deeper toward the edge of the first flange portion in the first connection passage Features a pipe connection.
3. The method of claim 2,
The escape groove is formed in a ring shape around the second connection passage on one surface of the second flange portion. The depth of the escape groove gradually increases from the second connection passage toward the edge of the second flange portion Features a pipe connection.
The method according to claim 1,
Wherein the synthetic resin connection port is provided in the form of a ring having an outer diameter larger than an outer diameter of the first connection pipe and smaller than an outer diameter of the first flange portion around the first connection pipe, And a reinforcing portion surrounding the outer connection portion of the pipe.
The method according to claim 1,
Wherein the metal connection port is provided in the form of a ring having an outer diameter larger than an outer diameter of the second connection pipe and smaller than an outer diameter of the second flange portion around the second connection pipe, And a reinforcing portion surrounding the outer connection portion of the pipe.
The method according to claim 1,
Wherein the diameter of the second connection passage of the metal connection port is larger than the diameter of the first connection passage of the synthetic resin connection port and the diameter of the passage of the gasket is equal to the diameter of the second connection passage of the metal connection port,
Wherein an inclined guide portion of a shape gradually decreasing in diameter while being inward of the first flange portion is provided in the periphery of the first connecting passage on one surface of the first flange portion in contact with the gasket, The diameter of the passage of the gasket is equal to the diameter of the passage of the gasket, and the innermost diameter of the inclined guide portion is equal to the diameter of the first connection passage.
KR1020120155180A 2012-12-27 2012-12-27 Device for connecting pipe KR20140085042A (en)

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KR20210087179A (en) * 2020-01-02 2021-07-12 민경옥 electric heater for double pipe of currenting water
KR20210087183A (en) * 2020-01-02 2021-07-12 민경옥 electric heater for pipe on currenting water
CN113531260A (en) * 2021-07-01 2021-10-22 深圳亚大塑料制品有限公司 Environment-friendly plastic pipeline flange joint
US20220120365A1 (en) * 2020-10-16 2022-04-21 Georg Fischer Rohrleitungssysteme Ag Flange seal

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KR20210087179A (en) * 2020-01-02 2021-07-12 민경옥 electric heater for double pipe of currenting water
KR20210087183A (en) * 2020-01-02 2021-07-12 민경옥 electric heater for pipe on currenting water
US20220120365A1 (en) * 2020-10-16 2022-04-21 Georg Fischer Rohrleitungssysteme Ag Flange seal
CN112627942A (en) * 2020-10-27 2021-04-09 蓝晶卡特排放技术南京有限公司 Regeneration method and system of diesel particulate filter
CN113531260A (en) * 2021-07-01 2021-10-22 深圳亚大塑料制品有限公司 Environment-friendly plastic pipeline flange joint

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