WO2017135178A1

WO2017135178A1 - Pipe connection structure

Info

Publication number: WO2017135178A1
Application number: PCT/JP2017/003077
Authority: WO
Inventors: 東宜輸本; 東伯輸本
Original assignee: 大基産業株式会社
Priority date: 2016-02-05
Filing date: 2017-01-20
Publication date: 2017-08-10
Also published as: JP2017141952A; JP6164762B1

Abstract

A pipe connection structure which achieves excellent air tightness, waterproofness and vibration resistance while having fewer components and involving fewer man-hours is provided. A pipe connection unit 100A is provided with a first pipe body 1 and a second pipe body 2. The second pipe body 2 has a flange 3 which is provided at the open end 1A of the first pipe body 1 and is formed integrally with the first pipe body 1, and a pipe portion 4 which stands erect from the peripheral edge of the flange 3, wherein the inner diameter of the pipe portion 4 is formed greater than the inner diameter of the first pipe body 1. In the middle of the upper surface, a seal cap 6 has a pipe insertion hole 6A into which a pipe 10A is inserted. The seal cap 6 is fitted onto the outer peripheral surface of the pipe portion 4 from the top end 4A of the pipe portion 4 of the second pipe body 2. A seal ring 5 is fitted into the annular space surrounded by the seal cap 6, the second pipe body 2, and the pipe 10A inserted into the pipe insertion opening 6A in the seal cap 6.

Description

Piping connection structure

The present invention relates to a pipe connection structure, and relates to a pipe connection structure for transporting a gas such as steam or air, a fluid such as water or oil, a powder, or a granule.

Generally, as a pipe connection structure, for example, a screw connection type, a flange connection type, or the like is known. The screw connection type is literally a connection method using pipe screws. The flange connection type or the like is a method in which flanges are attached to the connection ends of two pipes and connected with bolts and nuts through holes formed in the flanges.

JP 2010-203601 A

However, the screw-in connection type requires processes such as threading work by a skilled worker and rust prevention treatment after threading. In addition, the flange connection method requires many parts such as a flange, bolts and nuts, and in addition to this, the hole drilling work and the bolt and nut tightening work are complicated.

In view of the above-described problems, a pipe connection structure according to the present invention includes a first cylindrical body, a flange portion that is provided at an opening end of the first cylindrical body and is integrally formed with the first cylindrical body, and the flange. A second cylindrical body having a cylindrical portion erected on the periphery of the portion; a seal cap having a pipe insertion port into which a pipe is inserted; and fitted into the second cylindrical body; and the seal And a seal ring fitted in a space surrounded by the pipe inserted into the pipe insertion port of the cap, the second cylindrical body, and the seal cap.

According to the present invention, it is possible to provide a pipe connection structure excellent in airtightness, waterproofness and vibration proofing with a small number of parts and man-hours.

FIG. 1 is a diagram showing a pipe connection structure according to the first embodiment of the present invention.
2 is a cross-sectional view taken along line XX in FIG.
FIG. 3 is a diagram showing a piping structure in the second embodiment of the present invention.
4 is a cross-sectional view taken along line YY of FIG.
FIG. 5 is a view showing a pipe connection structure in the third to sixth embodiments of the present invention.
FIG. 6 is a view showing a pipe connection structure in the seventh and eighth embodiments of the present invention.
FIG. 7 is a view showing a pipe connection structure in the ninth and tenth embodiments of the present invention.
FIG. 8 is a view showing a pipe connection structure according to the eleventh embodiment of the present invention.
FIG. 9 is a view showing a pipe connection structure according to the twelfth embodiment of the present invention.

Next, the piping connection structure in the 1st Embodiment of this invention is demonstrated based on FIG.1 and FIG.2. 1A and 1B are views showing a T-shaped pipe connection structure 100. FIG. 1A is a plan view of the pipe connection structure 100, and FIG. 1B is a front view thereof. 2 is a cross-sectional view taken along line XX of FIG.
The pipe connection structure 100 connects the three

pipes

10A, 10B, and 10C to the T-shaped joint 11, and the plan view of FIG. 1A is only a pipe connection part 100A to which the pipe 10A is connected for convenience. Is shown.
The pipe connection part 100B to which the pipe 10B is connected on the opposite side of the pipe connection part 100A and the pipe connection part 100C to which the pipe 10C is branched from the joint 11 and connected in the lateral direction have the same structure as the pipe connection part 100A. Therefore, the configuration of the pipe connecting portion 100A will be described in detail below.
The pipe connection portion 100 A includes a first cylinder 1 and a second cylinder 2, and these cylinders constitute a part of the joint 11. The second cylindrical body 2 is provided at the opening end 1 A of the first cylindrical body 1, and is provided with a ring-shaped flange portion 3 integrally formed with the first cylindrical body 1, and is erected on the periphery of the flange portion 3. In order to form a space in which the seal ring 5 is inserted, the inner diameter of the cylinder part 4 is formed larger than the inner diameter of the first cylinder 1.
The seal cap 6 is formed of a lid-like cylinder having a pipe insertion port 6A into which the pipe 10A is inserted at the center of the upper surface. The seal cap 6 is fitted to the outer peripheral surface of the cylindrical portion 4 from the upper end 4 A of the cylindrical portion 4 of the second cylindrical body 2. In this case, by making the inner diameter of the seal cap 6 slightly smaller than the outer diameter of the cylindrical portion 4, both can be firmly fixed by the elastic force.
The seal ring 5 is fitted into a ring-shaped space surrounded by the pipe 10 A inserted into the pipe insertion port 6 A of the seal cap 6, the second cylinder 2, and the seal cap 6. In order to form the pipe connection portion 100A, first, the seal ring 5 is introduced into the ring-shaped space surrounded by the second cylinder 2 and the pipe 10A, and then the seal cap 6 is attached to the second cylinder. The seal ring 5 is inserted into the ring-shaped space by being fitted to the body 6.
According to the pipe connection part 100A, high airtightness, high waterproofness and high vibration proofing in the pipe connection part 100A can be realized with a small number of parts and man-hours. The seal ring 5 may be made of a resilient packing material such as rubber, or a liquid or gel sealing material such as a caulking material, an adhesive, or the like in order to achieve high airtightness. preferable.
The pipes 10A-10C, the first cylinder 1, the second cylinder 2, and the seal cap 6 can be made of a metal material such as an iron material, or a non-ferrous metal material, but in order to prevent corrosion. It is preferable to use a material having corrosion resistance such as stainless steel.
Next, a pipe connection structure according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a diagram showing a T-shaped pipe connection structure 200, FIG. 3 (a) is a plan view of the pipe connection structure 200, and FIG. 3 (b) is a front view thereof. 4 is a cross-sectional view taken along line YY of FIG.
This embodiment differs from the first embodiment in that the seal cap 6 has a ring-shaped protrusion 6B that protrudes in the longitudinal direction of the pipe 10A at the pipe insertion port 6A and contacts the outer peripheral surface of the pipe 10A. It is that you are. Thereby, since the contact area of the seal cap 6 and the pipe 10 A is increased, the airtightness and waterproofness can be further improved.
Next, pipe connection structures in the third to sixth embodiments of the present invention will be described based on FIGS. 5 (a) to 5 (d), respectively. The diagrams on the left side of FIGS. 5A to 5D correspond to the cross-sectional view taken along the line XX in FIG. 5A to 5D show the same cross-sectional shape of the seal ring 5 before being inserted.
In the pipe connection structures in the third to sixth embodiments, as shown in FIGS. 5A to 5D, the tip of the pipe 10A inserted into the pipe insertion port 6A of the seal cap 6 is the second one. The end of the flange part 3 of the cylinder 2 is in contact. In the third to fifth embodiments (FIGS. 5A to 5C), the entire seal ring 5 is surrounded by the second cylinder 2, the seal cap 6, and the pipe 10A. It is arrange | positioned in the closed space of this, and the airtightness of a pipe connection part is higher.
As shown in FIG. 5 (b), the pipe connection structure in the fourth embodiment is such that the upper surface of the seal cap 6 is in contact with the pipe 10A at an angle so that the seal cap 6 and the pipe 10A adhere to each other. Is increasing.
As shown in FIG. 5C, the pipe connection structure in the fifth embodiment is such that the ring-shaped protrusion 6 B is folded and extended in the opposite direction to the second embodiment.
In the pipe connection structure in the sixth embodiment, as shown in FIG. 5D, the seal cap 6 is folded back so as to sandwich the cylindrical portion 4 of the second cylindrical body 2 from both the inner peripheral surface and the outer peripheral surface. As a result, the adhesiveness / adhesiveness between the seal cap 6 and the second cylinder 2 is improved.
In this case, since the upper surface of the seal ring 5 is exposed to the outside from the pipe insertion port 6A of the seal cap 6, the seal ring 5 is made of rubber or the like in order to prevent the constituent material from escaping to the outside or leakage. It is preferable that it is comprised with the packing material which has elasticity.
Next, pipe connection structures in the seventh and eighth embodiments of the present invention will be described based on FIGS. 6 (a) and 6 (b), respectively. 6A and 6B correspond to a cross-sectional view taken along line XX in FIG.
As shown in FIG. 6A, the pipe connection structure in the seventh embodiment is a ring-shaped space in which the seal cap 6 is surrounded by the pipe 10A, the second cylinder 2 and the seal cap 6, preferably Has a filler inlet 6C communicating with the closed space. The seal ring 5 is formed of a filler introduced from the filler inlet 6C.
That is, in this embodiment, after the seal cap 6 is fitted to the second cylinder 2 and the pipe 10A is inserted into the seal cap 6 to form the space, the filler is introduced from the filler inlet 6C. The As described above, the filler is a liquid or gel sealing material such as a caulking material, an adhesive, or the like, such as silicone.
By providing the filler introduction port 6C, the sealant 5 can be easily formed by introducing the filler into the space, and the filler introduced through the filler introduction port 6C is external air. By contacting the surface, drying and curing of the filler can be promoted. In this case, by providing a plurality of filler inlets 6C, it is possible to shorten the filler introduction time and promote the effect of drying the filler.
As shown in FIG. 6B, the pipe connection structure in the eighth embodiment is a ring shape in which the second cylinder 2 is surrounded by the pipe 10 A, the second cylinder 2, and the seal cap 6. 2A, preferably a filler introduction port 2A communicating with the closed space. The seal ring 5 is formed of a filler introduced from the filler introduction port 2A. The filler introduction port 2 A can be formed in the cylindrical portion 4 or the flange portion 3 of the second cylindrical body 2.
Also in this embodiment, after the seal cap 6 is fitted to the second cylinder 2 and the pipe 10A is inserted into the seal cap 6 to form the space, the filler is introduced from the filler inlet 2A. . Similarly, by providing the filler introduction port 2A, the sealant 5 can be easily formed by introducing the filler into the space, and introduced through the filler introduction port 2A. Drying and hardening of the filler can be promoted by bringing the filler into contact with external air. In this case, by providing a plurality of filler introduction ports 2A, the introduction time of the filler can be shortened, and effects such as drying of the filler can be promoted.
Next, pipe connection structures in the ninth and tenth embodiments of the present invention will be described based on FIGS. 7 (a) and 7 (b), respectively. FIGS. 7A and 7B correspond to a cross-sectional view taken along line XX in FIG.
As shown in FIG. 7A, the pipe connection structure in the ninth embodiment is provided with a recess 4 B on the outer peripheral surface of the cylindrical portion 4 of the second cylindrical body 2 and a recess on the inner peripheral surface of the seal cap 6. The convex part 6D fitted to 4B is provided. Thereby, the seal cap 6 can be firmly fitted to the second cylinder 2.
As shown in FIG. 7B, the pipe connection structure in the tenth embodiment is provided with a recess 6E on the inner peripheral surface of the seal cap 6, contrary to the ninth embodiment. A convex portion 4C that fits into the concave portion 6E is provided on the outer peripheral surface of the cylindrical portion 4 of the cylindrical body 2. Also with this structure, the seal cap 6 can be firmly fitted to the second cylinder 2.
Next, a pipe connection structure according to the eleventh embodiment of the present invention will be described with reference to FIG. FIG. 8 corresponds to a sectional view taken along line XX in FIG.
As shown in FIG. 8, in the pipe connection structure in the eleventh embodiment, the seal cap 6 extends from the outer peripheral surface of the cylindrical portion 4 of the second cylindrical body 2 and contacts the flange portion 3. 6F, and the seal cap 6 is fitted to the flange portion 3. Thereby, the seal cap 6 can be firmly fitted to the second cylinder 2.
Next, a pipe connection structure according to a twelfth embodiment of the present invention will be described with reference to FIG. FIG. 9 corresponds to a cross-sectional view taken along line XX in FIG.
In the pipe connection structure in the twelfth embodiment, as shown in FIG. 9, a plurality of fine uneven portions 4D are continuously formed on the inner peripheral surface of the cylindrical portion 4 of the second cylindrical body 2 that contacts the seal ring 5. A plurality of fine concavo-convex portions 10AA are also continuously formed on the outer peripheral surface of the tip of the pipe 10A that is formed and contacts the seal ring 5. The concavo-convex portions 4D and 10AA can be formed by forming grooves or protrusions on the inner peripheral surface of the smooth cylindrical portion 4 and the outer peripheral surface of the tip of the pipe 10A, respectively.
Thereby, in addition to the increase in the contact area between the seal ring 5 and the cylindrical portion 4 and the pipe 10A, the adhesion between the two is enhanced by the so-called anchor effect, so the connection strength between the pipe 10A and the joint 11 is improved. It becomes possible. A certain degree of effect can be obtained if either one of the concave / convex portion 4D on the inner peripheral surface of the cylindrical portion 4 and the concave / convex portion 10AA on the outer peripheral surface of the pipe 10A is formed. It is preferable to provide uneven portions 4D and 10AA.
Specifically, the concavo-convex portion 4D on the inner peripheral surface of the cylindrical portion 4 can be formed by cutting using a tap or the like, polishing by sandpaper or sandblasting, or the like. In this case, the concavo-convex portion 4 D is formed over a part or the whole of the inner peripheral surface of the cylindrical portion 4. On the other hand, the concavo-convex portion 10AA on the outer peripheral surface of the pipe 10A can be formed by cutting using a die or the like, polishing by sandpaper or sandblasting, or the like. In this case, the concavo-convex portion 10AA is formed over a part or the whole of the outer peripheral surface of the distal end of the pipe 10A.
In each of the above-described embodiments, the T-shaped pipe connection structure has been described as an example. However, the present invention is not limited to this, and various types such as a socket shape, an L shape, a Y shape, a strainer shape, and a plug shape are used. It can be applied to a wiring connection structure. In addition, the characteristic configurations of the respective embodiments can be applied to the configurations of the other embodiments as appropriate. Furthermore, the present invention can be widely applied to a connection structure of a pipe for transporting a gas such as steam or air, a fluid such as water or oil, powder, or particles.

DESCRIPTION OF SYMBOLS 1 1st cylinder 2 2nd cylinder 2A Filler introduction port 3 Flange part 4 Tube part 4A Upper end 4B Concave part 4C Convex part 4D Concave part 5 Seal ring 6 Seal cap 6A Piping insertion port 6B Protrusion part 6C Filler introduction Port

6D Convex part

6E Concave part

6F Extension part 10A to 10C Piping 10AA Concavity and convexity part 100A to 100C Piping connection part 100,200 Piping connection structure

Claims

A first cylinder;
A second cylinder having a flange portion provided at an opening end of the first cylinder and integrally formed with the first cylinder, and a cylinder standing on the periphery of the flange;
A seal cap having a pipe insertion port into which a pipe is inserted and fitted into the second cylinder;
A pipe connection structure comprising: the pipe inserted into the pipe insertion port of the seal cap; and a seal ring fitted into a space surrounded by the second cylindrical body and the seal cap.
The pipe connection structure according to claim 1, wherein a tip of the pipe inserted into a pipe insertion port of the seal cap is in contact with a flange portion of the second cylindrical body.
The pipe connection structure according to claim 1 or 2, wherein the seal cap has a protruding part that protrudes in the longitudinal direction of the pipe at the pipe insertion port and contacts the pipe.
The seal cap is folded back so as to sandwich the cylindrical portion of the second cylindrical body from both the inner peripheral surface and the outer peripheral surface, and the upper surface of the seal ring is exposed to the outside from the pipe insertion port of the seal cap. The pipe connection structure according to claim 1, wherein the pipe connection structure is provided.
The seal cap has a filler inlet that communicates with a space surrounded by the pipe, the second cylinder, and the seal cap, and the seal ring is a filler introduced from the filler inlet The pipe connection structure according to claim 1, wherein the pipe connection structure is formed of a material.
The second cylinder has a filler inlet that communicates with a space surrounded by the pipe, the second cylinder, and the seal cap, and the seal ring is introduced from the filler inlet. The pipe connection structure according to any one of claims 1 to 3, wherein the pipe connection structure is formed of a filler.
The piping according to any one of claims 1 to 6, wherein a concave portion is provided in the cylindrical portion of the second cylindrical body, and a convex portion that is fitted into the concave portion is provided in the seal cap. Connection structure.
The piping according to any one of claims 1 to 6, wherein a concave portion is provided in the seal cap, and a convex portion that fits into the concave portion is provided in the cylindrical portion of the second cylindrical body. Connection structure.
The seal cap has an extending portion that extends from an outer peripheral surface of the tubular portion of the second tubular body and contacts the flange portion, and the seal cap is fitted to the flange portion. The pipe connection structure according to any one of claims 1 to 8.
The pipe connection structure according to any one of claims 1 to 9, wherein an uneven portion is formed on the inner peripheral surface of the cylindrical portion and / or the outer peripheral surface of the tip of the pipe, which is in contact with the seal ring. .