JPS6252291A - Method of joining pipe material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of joining pipe materials suitable for joining thin metal pipes or a metal pipe and a pipe joint.

As a pipe joining method that can be easily carried out at a construction site, a socket section with an annular gasket, etc. is formed on one side of the two pipe materials to be joined, and the mating pipe is inserted into this socket and processed from the outside. There was a method that involved applying pressure and biting the other pipe at the socket.

However, in this conventional method, the joining range of two pipe materials is only an area approximately equal to the length of the socket of one of the pipe materials, so after the joining work is completed, force is applied from a direction perpendicular to the pipe axis. In this case, there was a problem in that the joint part was weak against bending force and bent in a dogleg shape. this is,
Since the pipe material is long, it also causes avoidance, and a solution was needed.

The present invention is proposed to solve the above problems,
1 - Of the two pipes to be joined, the main pipe or the joint pipe in place of the main pipe is fitted with an elastic gasket ring on the 2nd surface of the inner frame of the taper-shaped socket whose diameter gradually increases toward the pipe end. In addition, a C-type metal fitting is attached, and a swallowing part of the mating tube with a locking part at the tip is formed continuously from the socket part, and the insertion end of the mating pipe is first inserted into the socket part, and the mating pipe is inserted into the socket. When the locking part at the tip of the engraved part is reached, the insertion operation is stopped7, and then, with two sets of split dies that have a tapered surface on a part of the push hole, insert the area near the pipe end of the main pipe or the joint pipe in place of this, and the receiving part. The tapered surface forming parts of the two sets of split dies are arranged so as to face each other while the rear parts of the mouth parts are held together, and both split dies are placed on the tube axis (C
By moving the split dies close to each other along the main pipe, pressure is applied to the vicinity of the pipe end of the main pipe or the alternative joint pipe to plastically deform it so as to bend it toward the outer wall of the other pipe, and the Mj-! A! : Compress the elastic gasket ring to exhibit a sealing effect, and press and compress the C-type J8 ring on the inner wall surface near the tapered pipe end without bending it, and press the inner peripheral edge against the inner wall surface near the tapered pipe end. The gist is to bite into the tube wall and lock the outer peripheral edge to the inclined inner wall surface at the tip of the socket.

The present invention will be described in detail below with reference to the drawings. The present invention is used for relatively thin stainless steel copper pipes and the like. On the inner wall surface of the socket 6 of the main pipe 1, an elastic gasket ring 4 for obtaining a compression sealing effect, a back-up plate 5, and a C-shaped metal ring 6 for preventing pull-out are arranged (2).

In order to join the main pipe 1 and the mating pipe 2, first, the socket part 6
The mating tube 2 is inserted into the socket 3, and the insertion operation is stopped when the insertion end 8 reaches the locking portion 9 of the swallowing portion 7 of the phase Ef=− tube that is continuous with the socket portion 3.

After insertion, the vicinity of the tongue end of the main pipe 1 and the rear part of the socket are held and placed facing each other with two sets of split die 12.13 having a taper [fn1415] as shown in the first piece. Then the second
As shown in the figure, two sets of split dies 12 and 16 are moved relatively toward each other in the direction of the arrow, that is, along the tube axis.

When the vicinity of the tube end is pressed with one of the split dies 13, the cylindrical portion of the socket portion 3 is plastically deformed so that it is gradually bent and narrowed along the slope of the tapered surface 15, as shown in FIG. It will have a shape like this.
2 When the joining work is completed in this way, the compressed elastic gasket ring 4 exhibits a sealing effect.
The inner circumferential edge 11 of the C-shaped paulownia ring 6, which has been pressed and toggled, bites into the wall of the mating pipe, and the outer circumferential edge 10 engages with the inclined inner wall surface at the tip of the socket, thereby exerting a sealing effect to prevent removal. It happens.

In the conventional joining method, the mating pipe is inserted by the length of the socket part 6 and the tightening is fixed, but in the present invention, in addition to the socket part 3, a mating pipe swallowing part 7 is formed. partner pipe 2
The range supported by the main pipe 1 has become longer.

Therefore, even if a force is applied from a direction perpendicular to the tube axis after the two tubes are joined, it is possible to prevent bending at the joint.

As described above, according to the present invention, it is possible to provide a method for joining tube materials that is strong against force in a direction perpendicular to the tube axis at the joining location.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a mating pipe inserted into the main pipe before processing, and FIG. 2 is a partial cross-sectional view showing a state in which the mating pipe is joined. In the figure 1: Main pipe 2: Mating pipe 6: Part opening part 4: 4-mass gasket ring 5: Back-up pipe 6 20-type metal flexible ring 7: 8 + hand pipe part 4 part 8: Insertion end part 9: Section 1) Part 10: Outer peripheral edge 11: Inner peripheral edge 12: Split die 16: Split tie 14: Tapered surface 15: Chill bar surface Patent applicant Mie Enamel Co., Ltd. Agent
Kusuyata Shimamoto Procedural Amendment Export) July 11, 1986

Claims (1)

[Scope of Claims] Of the two pipe materials to be joined, the main pipe or a joint pipe in place of the main pipe is provided with a tapered socket whose diameter gradually increases toward the pipe end, and the inner wall surface of the socket has an elastic material. A body gasket ring and a C-shaped metal ring are attached, and a mating pipe swallowing part with a locking part at the tip is formed continuously from the socket part,
First, insert the insertion end of the mating tube into the receptacle, stop the insertion operation when it reaches the locking part at the tip of the swallowing part of the mating tube, and then insert two sets of split molds having tapered surfaces on the pressing part. The tapered surface forming portions of the two sets of split mold dies are arranged so as to face each other, while the pipe end vicinity and the rear part of the socket part of the main pipe or a joint pipe replacing it are respectively held by the dies, and both split molds are formed. By moving the die close to the tube axis, one side of the split die applies pressure to the vicinity of the tube end of the main tube or a substitute tube to plastically deform it so as to bend it toward the outer wall of the other tube,
As a result, the elastic gasket ring is compressed to exhibit a sealing effect, and the C-shaped metal ring is pressed to a compressed diameter on the inner wall surface near the tapered end of the pipe, and its inner peripheral edge is attached to the mating pipe. A method for joining pipe materials, which is carried out by biting into the wall and locking the outer peripheral edge to the inclined inner wall surface at the tip of the socket.