JP2019183902A - Pipe module - Google Patents

Abstract

To provide a pipe module which enables reduction of an assembly load needed when flanges of pipes are fastened by a clamp tool.SOLUTION: A pipe module includes: a first pipe 2; a second pipe 3; and a clamp tool 4 connecting the first pipe 2 with the second pipe 3. The first pipe 2 includes: a first pipe body 10; and a first flange 11 which is provided at the first pipe body 10 and formed so as to protrude from an outer peripheral surface of the first pipe body 10 in an outward direction. The second pipe 3 includes: a second pipe body 40; and a second flange 41 which is provided at the second pipe body 40 and formed so as to protrude from an outer peripheral surface of the second pipe body 40 in the outward direction. The first flange 11 includes: a fixed flange 13 which is fixed to the first pipe body 10 and formed so as to protrude from the outer peripheral surface of the first pipe body 10 in the outward direction; and a movable flange 12 which is provided so as to be relatively movable along the fixed flange 13. The clamp tool 4 sandwiches the movable flange 12 and the second flange 41.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a piping module, and relates to a piping module in which tubes are connected by a clamp device.

  The vehicle includes a piping module through which exhaust gas from the engine flows. The piping module includes a plurality of exhaust pipes and a clamp device that connects the exhaust pipes. Each exhaust pipe includes a pipe body and a flange formed at an end of the pipe body.

  When connecting the exhaust pipes, first, the flanges of the two exhaust pipes are brought into contact with each other, and a gasket is disposed between the flanges. Then, a clamp device is attached to the outer circumferences of the two flanges and fastened so that the two flanges are brought into close contact with each other.

  When the two flanges are fastened by the clamp device, the gasket is brought into close contact with each flange, and the exhaust gas is prevented from leaking from the fastening portion between the pipes.

  As a clamp instrument, a clamp instrument described in JP 2014-25503 A is known. The clamping device includes two clamping pieces, a connecting ring, a bolt and a nut.

  Each clamp piece is formed in an arc shape, and each clamp piece includes a curl portion formed at one end and an ear portion formed at the other end. A fastening groove is formed on the inner peripheral surface of each clamp piece. The connection ring is connected to a curled portion of each clamp piece, and each clamp piece is rotatable about the curled portion.

  The bolt is fixed to the ear portion of one clamp piece, and is inserted into a through hole formed in the ear portion of the other clamp piece. The nut is screwed to the lower end of the bolt.

  When connecting the exhaust pipes, first, the flanges of the exhaust pipes are opposed to each other, and a gasket is disposed between the flanges.

  Thereafter, each clamp piece is rotated about the curl portion, and each clamp piece is mounted on the outer periphery of the flange. Then, the nut is screwed onto the lower end portion of the bolt, and the nut is tightened. When the nut is tightened, the ears of the clamp pieces come close to each other, and the flanges are displaced by the fastening grooves of the clamp pieces so that the gaskets come into close contact with the flanges.

JP 2014-25503 A

  When connecting exhaust pipes with a clamp device, it is first necessary to arrange the exhaust pipes coaxially. On the other hand, since the length of the exhaust pipe is long, the crossing is large, and the exhaust pipe is lowered by the backlash and weight for absorbing the crossing. Therefore, it is difficult to arrange the exhaust pipes on the same axis.

  For this reason, when the exhaust pipes are connected, the two exhaust pipes may be slightly misaligned. If two clamped pipes are to be connected with a clamp device, when the flange is fastened with the clamp device, each flange is moved in the radial direction by the assembly load so that the flange of each pipe is accurately aligned. Need arises. At this time, if each pipe is already connected to other pipes, there is a problem that each pipe to be assembled is deformed (an assembly distortion occurs).

  The present disclosure has been made in view of the above-described problems, and an object of the present disclosure is to reduce an assembly load and an assembly distortion required when fastening flanges of each pipe with a clamp device. It is to provide a piping module that can.

  The piping module according to the present disclosure includes a first piping, a second piping, and a clamp device that connects the first piping and the second piping. The first pipe includes a first pipe main body, and a first flange provided on the first pipe main body and formed so as to protrude outward from the outer peripheral surface of the first pipe main body. The second pipe includes a second pipe main body and a second flange provided on the second pipe main body and formed so as to protrude outward from the outer peripheral surface of the second pipe main body. The first flange is fixed to the first pipe body and is provided so as to be relatively movable along the fixed flange and a fixed flange formed so as to protrude outward from the outer peripheral surface of the first pipe body. Including movable flanges. The clamp device sandwiches the movable flange and the second flange.

  According to said piping module, when connecting 1st piping and 2nd piping, a 1st flange and a 2nd flange are made to oppose. When the first pipe and the second pipe are misaligned, the movable flange of the first flange is moved to accurately contact the second flange.

  And a 1st piping and a 2nd piping can be connected because a clamp instrument fixes a movable flange and a 2nd flange. In this way, when connecting the first pipe and the second pipe that are misaligned, it is only necessary to move the movable flange, and it is possible to suppress applying a large assembly load to the first pipe and the second pipe.

  The movable flange is formed with an insertion hole into which the first pipe body is inserted, and a gap is formed between the inner peripheral surface of the movable flange forming the insertion hole and the outer peripheral surface of the first pipe body. Has been.

  According to said piping module, since the clearance gap is formed between the movable flange and the 1st pipe body, the movable flange is provided so that a movement relative to the 1st pipe body is possible.

  The second flange is fixed to the second pipe body. According to this piping module, the movable module is not provided in the second piping, and the manufacturing cost of the second piping can be reduced.

  The movable flange includes a first contact surface that contacts the second flange, and the second flange includes a second contact surface that contacts the movable flange. A first engagement portion is formed on one contact surface of the first contact surface and the second contact surface, and a first engagement is formed on the other contact surface of the first contact surface and the second contact surface. A second engagement portion that engages with the portion is formed.

  According to said piping module, a movable flange can be easily made into a 2nd flange by engaging the 1st engaging part formed in the movable flange, and the 2nd engaging part formed in the 2nd flange. Can be aligned.

  The piping module further includes a gasket sandwiched between the fixed flange and the second flange. Even when the first pipe and the second pipe are fastened with the clamp device, the fixed flange and the second flange do not move relative to each other, so that even if a gasket is disposed between the fixed flange and the second flange, the gasket Can be prevented from being damaged.

  According to the piping module according to the present disclosure, it is possible to reduce the assembly load required when fastening the flange of each piping with the clamp device.

1 is a cross-sectional view showing a piping module 1. FIG. 3 is a cross-sectional view showing a pipe 2. FIG. It is sectional drawing which shows the movable flange. 3 is a cross-sectional view showing a pipe 3. FIG. It is sectional drawing which shows the gasket 5. FIG. It is a side view which shows the clamp instrument. FIG. 7 is a cross-sectional view of the clamp piece 60 as viewed in cross section along the line VII-VII shown in FIG. FIG. 7 is a cross-sectional view when the clamp piece 61 is viewed in cross section along the line VIII-VIII shown in FIG. 6. It is sectional drawing which shows the 1st process which connects the piping 2 and the piping 3. FIG. It is sectional drawing which shows the 2nd process of connecting the piping 2 and the piping 3. FIG. It is sectional drawing which shows the 3rd process of connecting the piping 2 and the piping 3. FIG. It is sectional drawing which shows 1 A of piping modules. It is sectional drawing which shows 13 A of fixing flanges. It is sectional drawing which shows the modification of 1 A of piping modules. It is sectional drawing which shows 1C of piping modules.

The piping module according to the present embodiment will be described with reference to FIGS. Among the configurations shown in FIGS. 1 to 15, the same or substantially the same configurations are denoted by the same reference numerals, and redundant description is omitted.
(Embodiment 1)
FIG. 1 is a cross-sectional view showing the piping module 1. The piping module 1 includes a piping 2, a piping 3, a clamping device 4, and a gasket 5.

  The pipe 2 includes a pipe body 10 and a flange 11. The tube body 10 is formed in a hollow shape and is formed of a metal material. The flange 11 is provided on the end side of the pipe body 10. The flange 11 includes a fixed flange 13 and a movable flange 12.

  The fixing flange 13 is fixed to the end portion of the tube body 10 and is formed to extend outward from the end portion of the tube body 10.

  FIG. 2 is a cross-sectional view showing the pipe 2. The tube main body 10 is formed in a circular tube shape, and the central axis O <b> 1 is the central axis of the tube main body 10.

  The fixed flange 13 is formed so as to extend in the radial direction from one end of the tube body 10, and the fixed flange 13 is formed in a hollow disk shape.

  The fixing flange 13 includes a side surface 14 and a side surface 15. The side surface 14 and the side surface 15 are arranged in the thickness direction of the fixing flange 13. The side surface 14 is formed with an opening 16 communicating with the hollow portion in the tube main body 10. The side surface 14 is a contact surface that contacts the gasket 5, and is also a facing surface that faces the pipe 3. The side surface 15 is located on the back side of the side surface 14.

  FIG. 3 is a cross-sectional view showing the movable flange 12. An insertion hole 24 is formed in the movable flange 12, and the movable flange 12 includes a side surface 20, a side surface 21, an outer peripheral surface 22, and an inner peripheral surface 23.

  The side surface 20 includes a flat surface 25 and a tapered surface 26, and an opening 27 of the insertion hole 24 is formed in the side surface 20. The flat surface 25 is formed along the opening edge of the opening 27. The flat surface 25 is formed so as to extend from the opening 27 in the radial direction of the tube body 10.

  The tapered surface 26 is formed along the outer peripheral edge of the flat surface 25. The tapered surface 26 is inclined so as to approach the side surface 21 from the outer peripheral edge of the flat surface 25 toward the outer peripheral surface 22.

  An opening 28 of the insertion hole 24 is formed on the side surface 21. The side surface 21 is formed to extend in the radial direction from the opening edge of the opening 28.

  The inner peripheral surface 23 is an inner peripheral surface of the insertion hole 24. The inner peripheral surface 23 includes a cylindrical inner peripheral surface 30, an annular surface 31, and a cylindrical inner peripheral surface 32. The cylindrical inner peripheral surface 30 is formed concentrically, and is formed to extend from the side surface 20 toward the side surface 21.

  The cylindrical inner peripheral surface 32 is formed concentrically and extends from the side surface 21 toward the side surface 20.

  The annular surface 31 is formed so as to connect the opening 33 on the side surface 21 side of the cylindrical inner peripheral surface 30 and the annular end portion 34 on the side surface 20 side of the cylindrical inner peripheral surface 32. The annular surface 31 is formed so as to extend in the radial direction of the tube body 10. For this reason, a step portion is formed by the cylindrical inner peripheral surface 32 and the annular surface 31.

  In FIG. 1, the movable flange 12 and the fixed flange 13 are arranged so that the annular surface 31 of the movable flange 12 and the side surface 15 of the fixed flange 13 are in contact with each other.

  The tube body 10 is inserted into the insertion hole 24, and a gap 35 is formed between the cylindrical inner peripheral surface 30 of the movable flange 12 and the outer peripheral surface of the tube main body 10. The gap 35 is formed so as to extend annularly along the outer peripheral surface of the tube main body 10 and the cylindrical inner peripheral surface 30.

  The annular surface 31 of the movable flange 12 is in contact with the side surface 15 of the fixed flange 13. For this reason, in a state before the movable flange 12 is fixed by the clamp device 4, the movable flange 12 is provided so as to be movable along the side surface 15 of the fixed flange 13. Since a gap 35 is formed between the movable flange 12 and the tube main body 10, the movable flange 12 is provided to be movable relative to the tube main body 10 and the fixed flange 13.

  The pipe 3 includes a fixed flange 41, a pipe body 40, and a welded part 42. The pipe main body 40 is formed in a hollow shape, and the fixing flange 41 is fixed to the outer peripheral surface of the pipe main body 40 by a welded portion 42.

  FIG. 4 is a cross-sectional view showing the pipe 3. The fixing flange 41 includes a side surface 45, a side surface 46, and an outer peripheral surface 47. The side surface 45 and the side surface 46 are arranged in the direction in which the central axis O2 of the fixing flange 41 extends. The side surface 45 is a facing surface facing the movable flange 12 or the fixed flange 13, and the side surface 46 is formed on the back side of the side surface 45.

  The side surface 45 includes an annular surface 50, an annular groove 51, and an annular surface 52. The annular groove 51 is formed between the annular surface 50 and the annular groove 51. The annular surface 50 is formed on the inner peripheral side of the annular groove 51, and the annular surface 52 is formed on the outer peripheral side of the annular groove 51. The annular groove 51 is formed in an annular shape around the central axis O2 of the fixed flange 41.

  The annular surface 50 is formed in an annular shape along the outer peripheral surface 47 of the fixed flange 41, and is formed in an annular shape around the central axis O <b> 2 of the fixed flange 41. The annular surface 52 is also formed in an annular shape around the central axis O2. The annular surfaces 50 and 52 are formed into flat surfaces so as to extend in the radial direction of the fixing flange 41.

  The side surface 46 is an annular inclined surface. The side surface 46 is inclined so as to be separated from the side surface 45 as it approaches the pipe body 40 from the outer peripheral surface 47.

  FIG. 5 is a cross-sectional view showing the gasket 5. A through hole 59 is formed in the gasket 5. The gasket 5 is formed in a cylindrical shape. The gasket 5 includes a side surface 57 and a side surface 58. The side surface 57 and the side surface 58 are formed in an annular shape, and the side surfaces 57 and 58 are formed along the opening of the through hole 59.

  The gasket 5 is inserted into the annular groove 51 of the fixed flange 41 shown in FIG. 1, and the gasket 5 is sandwiched between the fixed flange 41 and the fixed flange 13.

  FIG. 6 is a side view showing the clamp device 4. The clamp device 4 includes clamp pieces 60 and 61, a connection ring 62, a bolt 63, and a nut 64.

  The clamp piece 60 includes a main body portion 65, a curl portion 66, an overhang portion 67, and a contact piece 68. The main body 65 is formed in an arc shape. The curled portion 66 is formed at one end of the main body portion 65 and is engaged with the connecting ring 62.

  The overhang portion 67 is formed at the other end of the main body portion 65, and is formed so as to protrude outward from the other end of the main body portion 65. The contact piece 68 is formed at the distal end portion of the overhang portion 67.

  The clamp piece 61 is formed symmetrically with the clamp piece 60. The clamp piece 61 includes a main body part 70, a curl part 71, an overhang part 72, and a contact piece 73.

  The main body 70 is formed in an arc shape. The curled portion 71 is formed at one end of the main body portion 70, and a connecting ring 62 is attached to the curled portion 71.

  The overhang portion 72 is formed at the other end of the main body portion 70, and the contact piece 73 is formed at the distal end portion of the overhang portion 72.

  The connecting ring 62 is attached to the curled portion 66 and the curled portion 71, and the clamp piece 60 and the clamp piece 61 are provided so as to rotate around the connecting ring 62 side.

  The bolt 63 is provided so as to penetrate the overhang portion 67 and the overhang portion 72. The bolt 63 is welded to the overhang portion 67, and the lower end portion of the bolt 63 is provided so as to protrude downward from the overhang portion 72. The nut 64 is provided on the lower end side of the bolt 63 protruding from the overhang portion 72.

  FIG. 7 is a cross-sectional view of the clamp piece 60 as viewed in cross section along the line VII-VII shown in FIG. The clamp piece 60 includes an outer peripheral wall 75, a side wall 76, and a side wall 77. The side wall 76 is connected to one side portion of the outer peripheral wall 75, and the side wall 77 is connected to the other side portion of the outer peripheral wall 75.

  The inner peripheral surface 78 of the clamp piece 60 includes a top surface 79, an inner side surface 80, and an inner side surface 81. The top surface 79 is formed to extend in an arc shape.

  The inner side surface 80 is connected to one side of the top surface 79, and the inner side surface 81 is connected to the other side of the top surface 79. The inner side surface 80 is formed so as to extend along the tapered surface 26 of the movable flange 12. The inner side surface 81 is formed so as to extend along the side surface 46 of the fixing flange 41.

  The inner side surface 80 and the inner side surface 81 are formed such that the inner side surface 80 and the inner side surface 81 are separated from each other as the distance from the top surface 79 increases. FIG. 8 is a cross-sectional view of the clamp piece 61 taken along the line VIII-VIII shown in FIG.

  The main body 70 of the clamp piece 61 includes an outer peripheral wall 83, a side wall 84 and a side wall 85. The inner peripheral surface 82 of the clamp piece 61 includes a bottom surface 86 and inner side surfaces 87 and 88.

  The inner side surface 87 is formed so as to extend along the tapered surface 26 of the movable flange 12, and the inner side surface 88 is formed so as to extend along the side surface 46 of the fixed flange 41.

  1 and 6, the clamp device 4 is mounted from the outside of the movable flange 12 and the fixed flange 41 in a state where the gasket 5 is sandwiched between the fixed flange 13 and the fixed flange 41.

  When the nut 64 is tightened, the clamp piece 60 and the clamp piece 61 of the clamp device 4 are rotated around the connecting ring 62 so as to approach each other.

  Thereby, the inner surface 87 of the clamp piece 61 presses the movable flange 12 toward the fixed flange 41, and the inner surface 88 of the clamp piece 61 presses the fixed flange 41 toward the flange 11. Similarly, the clamp piece 60 also presses the movable flange 12 toward the fixed flange 41 and presses the fixed flange 41 toward the flange 11.

  Thereby, the space | interval between the flange 11 of the piping 2 and the fixing flange 41 of the piping 3 becomes narrow, and the gasket 5 is firmly clamped by the fixing flange 13 and the fixing flange 41. Thereby, it can suppress that the exhaust gas, the liquid, etc. which pass through the inside of the piping 2 and the piping 3 leak outside.

  Next, a case where the pipe 2 and the pipe 3 are connected using the clamp device 4 in a state where the center axis O1 and the center axis O2 are displaced in the vertical direction will be described with reference to FIG.

  FIG. 9 is a cross-sectional view showing a first step of connecting the pipe 2 and the pipe 3. When connecting the pipe 2 and the pipe 3, the gasket 5 is sandwiched between the fixed flange 13 and the fixed flange 41 with the pipe 2 and the pipe 3 facing each other.

  FIG. 10 is a cross-sectional view showing a second step of connecting the pipe 2 and the pipe 3. The user aligns the movable flange 12 with the fixed flange 41. Specifically, the movable flange 12 is moved along the fixed flange 13, and the movable flange 12 is moved upward.

  At this time, since a gap 35 is formed between the cylindrical inner peripheral surface 30 of the movable flange 12 and the outer peripheral surface of the tube main body 10, the interference of the fixed flange 13 with the tube main body 10 is suppressed. Yes.

  FIG. 11 is a cross-sectional view showing a third step of connecting the pipe 2 and the pipe 3. The user attaches the clamp device 4 to the outer peripheral side of the movable flange 12 and the fixed flange 41. Then, by tightening the nut 64, the movable flange 12 and the fixed flange 41 are fixed, and the gasket 5 is brought into close contact between the fixed flange 13 and the fixed flange 41.

  According to the piping module 1 according to the present embodiment, the piping 2 and the piping 3 can be mounted by moving the movable flange 12 and mounting the clamp device 4 even when the piping 2 and the piping 3 are out of axis with each other. 3 can be connected.

  When connecting the pipe 2 and the pipe 3 which are off-axis, it is not necessary to move the pipe 2 and the pipe 3, and a large load can be suppressed from being applied to the pipe 2 and the pipe 3.

  Since a large load can be suppressed from being applied to the pipes 2 and 3, the pipes 2 and 3 can be prevented from being deformed or damaged.

  Further, in the process of connecting the pipe 2 and the pipe 3, the relative movement of the fixed flange 13 and the fixed flange 41 is suppressed. For this reason, it can suppress that the gasket 5 damages because the fixed flange 13 and the fixed flange 41 move relatively, and can suppress that the sealing performance of the piping module 1 falls.

Further, in the piping module 1 according to the first embodiment, the fixed flange 41 of the pipe 3 is fixed to the pipe main body 40, and no movable flange is provided in the pipe 3. For this reason, the number of parts of the pipe 2 is small, and the manufacturing cost of the pipe 2 can be reduced.
(Embodiment 2)
A piping module 1A according to the second embodiment will be described with reference to FIG. FIG. 12 is a cross-sectional view showing the piping module 1A. The piping module 1 </ b> A includes a piping 2 </ b> A and a piping 3. The pipe 2A includes a pipe body 10 and a flange 11A. The flange 11A includes a movable flange 12 and a fixed flange 13A. Unlike the fixing flange 13 of the first embodiment, the fixing flange 13A is separate from the pipe body 10. The fixed flange 13A is welded to the pipe body 10 by the welded portion 90.

  FIG. 13 is a cross-sectional view showing the fixed flange 13A. The fixed flange 13 </ b> A includes a cylindrical portion 91, a diameter-expanded portion 92, and a flange portion 93.

  The cylindrical portion 91 is formed in a cylindrical shape, and the enlarged diameter portion 92 is formed so that the inner diameter increases as the distance from the cylindrical portion 91 increases. The flange portion 93 is formed to extend in the radial direction of the pipe body 10.

  According to the piping module 1 </ b> A, the fixing flange 13 </ b> A can be processed separately from the pipe body 10, and the bending radius of the enlarged diameter portion 92 can be easily reduced. As a result, the length of the fixed flange 13A in the direction of the central axis O1 can be shortened. As a result, the length of the connecting portion between the pipe 2A and the pipe 3 can be kept small.

In addition, FIG. 14 is sectional drawing which shows the modification of 1 A of piping modules. The piping module 1B includes a piping 2B and a piping 3. The pipe 2B includes a pipe body 10 and a flange 11B. The flange 11B includes a movable flange 12 and a fixed flange 13B. The fixed flange 13 </ b> B is fixed to the outer peripheral surface of the pipe body 10 by a welded portion 96. The fixed flange 13 </ b> B includes a cylindrical portion 97 and a flange portion 98. The tube body 10 is inserted into the cylindrical portion 97. Thus, various shapes can be employed as the fixing flange.
(Embodiment 3)
A piping module 1C according to the third embodiment will be described with reference to FIG. FIG. 15 is a cross-sectional view showing the piping module 1C. The piping module 1C includes a piping 2C and a piping 3C.

  The pipe 2C includes a pipe body 10 and a flange 11C. The flange 11 </ b> C includes a movable flange 12 </ b> C and a fixed flange 13. The movable flange 12 </ b> C includes an annular convex portion 94 formed on the side surface 21. The pipe 3C includes a pipe body 40 and a fixing flange 41C. An annular recess 95 is formed in the annular surface 52 of the fixed flange 41C.

  The annular convex portion 94 is fitted into the annular concave portion 95, and the annular convex portion 94 is engaged with the annular concave portion 95.

  For this reason, the movable flange 12C can be easily fixed by fitting the annular convex portion 94 into the annular concave portion 95 in the step of aligning the movable flange 12C with the fixed flange 41C in a state where the pipe 2C and the pipe 3C are misaligned. It can be easily aligned with the flange 41C.

  Along with this, it becomes easy to attach the clamp device 4 to the movable flange 12C and the fixed flange 41C, and the piping 2C and the piping 3C can be easily connected.

  In addition, various shapes can be adopted as a configuration for engaging the fixing flange 13C and the fixing flange 41C with each other. For example, instead of the annular recess 95, a stepped portion may be formed so that the annular convex portion 94 fits into the stepped portion. In the example shown in FIG. 15, a convex portion is formed on the movable flange 12C and a concave portion is formed on the fixed flange 41C. However, a concave portion is formed on the movable flange 12C and a convex portion is formed on the fixed flange 41C. May be.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. Furthermore, the above numerical values are examples, and are not limited to the above numerical values and ranges.

  1, 1A, 1B, 1C Piping module, 2, 2A, 2B, 2C, 3, 3C piping, 4 Clamping instrument, 5 Gasket, 10, 40 Pipe body, 11, 11A, 11B, 11C Flange, 12, 12C Movable flange , 13, 13A, 13B, 13C, 41, 41C fixed flange, 14, 15, 20, 21, 45, 46, 57, 58 side surface, 16, 27, 28, 33 opening, 22, 47 outer peripheral surface, 23, 78, 82 inner peripheral surface, 24 insertion hole, 25 flat surface, 26 tapered surface, 30, 32 cylindrical inner peripheral surface, 31, 50, 52 annular surface, 34 end, 35 gap, 42, 90, 96 weld , 51 annular groove, 59 through hole, 60, 61 clamp piece, 62 connecting ring, 63 bolt, 64 nut, 65, 70 body part, 66, 71 curl part, 67, 72 Overhang portion, 68, 73 contact piece, 75 outer peripheral wall, 76, 77, 84, 85 side wall, 79 top surface, 80, 81, 87, 88 inner surface, 83 outer peripheral wall, 86 bottom surface, 91, 97 cylinder portion, 92 enlarged diameter part, 93, 98 flange part, 94 annular convex part, 95 annular concave part.

Claims (5)

A first pipe;
A second pipe;
A clamping device for connecting the first pipe and the second pipe;
With
The first piping is
A first pipe body;
A first flange provided on the first pipe body and formed to project outward from an outer peripheral surface of the first pipe body;
The second pipe is
A second pipe body;
A second flange provided on the second pipe main body and formed to project outward from an outer peripheral surface of the second pipe main body,
The first flange is
A fixing flange that is fixed to the first pipe body and is formed to project outward from the outer peripheral surface of the first pipe body;
A movable flange provided to be relatively movable along the fixed flange,
The clamp device is a piping module that sandwiches the movable flange and the second flange. The movable flange is formed with an insertion hole into which the first pipe body is inserted,
The piping module according to claim 1, wherein a gap is formed between an inner peripheral surface of the movable flange that forms the insertion hole and an outer peripheral surface of the first pipe body.   The piping module according to claim 1 or 2, wherein the second flange is fixed to the second pipe body. The movable flange includes a first contact surface in contact with the second flange;
The second flange includes a second contact surface in contact with the movable flange;
A first engagement portion is formed on one contact surface of the first contact surface and the second contact surface,
The second engagement portion that engages with the first engagement portion is formed on the other contact surface of the first contact surface and the second contact surface. The piping module described.   The piping module according to any one of claims 1 to 4, further comprising a gasket sandwiched between the fixed flange and the second flange.

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