JPH03230831A - Method for connecting tubes - Google Patents

Abstract

PURPOSE:To improve reliability to leakage and to make execution easy by inserting a ring like rubber packing, a collar, a C-ring material into a diameter expanding part formed at the tube end part of a 1st tube to increase the strength through which the 1st and the 2nd tube bite each other by connecting operation. CONSTITUTION:A 1st diameter expanding part 3 having an inner end to lock the 2nd tube 2 in the 1st tube 1 and a 2nd diameter expanding part larger in diameter than the 1st diameter expanding part 3 and having a tapered surface in the inner end are provided. A 3rd diameter expanding part 6 larger in diameter than the 2nd diameter expanding part and having a tapered surface in the inner end, too, is provide. A deformation preventing collar 9 is mounted on a ring-shaped rigid rubber packing 8 projecting a little from the 2nd diameter expanding part to the 3rd diameter expanding part 6 and its end face to fit the C-shaped ring material 10 into the 3rd diameter expanding part 6. The 2nd tube 2 is passed by hand through each inner surface of the C-shaped ring material, the collar 9, ring-shaped rubber packing 8 of this 1st tube and the 1st diameter expanding part 3 and locked in the inner end of the 1st diameter expanding part 3 and the outer end of the 3rd diameter expanding part 6 is bent to bite the C-shaped ring material before the outer end of the 3rd diameter expanding part 6 abuts nearly on the outer periphery of the 2nd tube. In this way, a connecting tube high in reliability can be obtained easily.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a pipe connection method, in which a first pipe and a second pipe of the same diameter and thickness are separated, and after connection, 12 pipes become the first pipe. In the pipe, first, second and third enlarged diameter parts are sequentially formed at the end of the first pipe from the back, a hard ring-shaped rubber packing is fitted using the second enlarged diameter part, and a third enlarged part is formed. This relates to a method of fitting a C-shaped ring material using a C ring material, and further fitting it to the MS2 pipe up to the first enlarged diameter part, and strongly connecting the first pipe and the second pipe so as not to deform them. be.

(Conventional technology) Sanitary and water supply and drainage piping in buildings requires on-site connection of connecting pipes, and there are two ways to connect them: using fittings, or connecting pipes by welding, etc. Different methods are used to connect thin stainless steel pipes, etc. However, there are problems in terms of low risk of leakage at connection points, high reliability, and low cost.

There are many undeveloped technologies for reducing the number of connections, reducing the risk of leakage, increasing the reliability of joints, and reducing construction costs.

For example, the technology for connecting each end is disclosed in Japanese Patent Application Laid-Open No. 57-20438.
Although disclosed in Publication No. 7, a simple construction method in which an enlarged diameter section is provided at the first pipe end 3-section during construction and the second pipe is directly inserted has not yet been developed.

(Problems to be Solved by the Invention) In view of the above, the present invention provides a ring-shaped rubber gasket, a collar, and a C-shaped ring on the enlarged diameter portion formed at the tube end of the first tube to which the second tube is connected by fitting the inner fitting type. As a means of solving the problem, we decided to develop a method that increases the mutual biting strength of the first W and second pipes by inserting materials and connecting them, which can also be carried out on-site with few tools. , which is the object of the present invention.

(Means for Solving the Problems) The connection method of the present invention achieves the purpose of solving the problems described above. Specifically, it consists of a first pipe and a second pipe having the same diameter and the same thickness, and after the connection, 4- A connecting pipe in which the second pipe becomes the first pipe, the first enlarged diameter part having a deep end that locks the second pipe to the first pipe, and the first enlarged diameter part that has a larger diameter than the first enlarged part and has a deep end that locks the second pipe to the first pipe. A second enlarged diameter part with a tapered surface at the end, a short fjfJ3 enlarged diameter part whose diameter is expanded more than the second enlarged diameter part and a tapered surface at the rear end, and a second enlarged diameter part. a hard ring-shaped rubber gasket over a length slightly protruding from the third enlarged diameter portion;
Attach a deformation prevention collar to the end face of the rubber gasket,
A C-shaped ring material is fitted into the third enlarged diameter section, and the second tube is manually brought into almost intimate contact with the C-shaped ring material of the first tube, the collar ring-shaped rubber gasket, and each inner surface of the first enlarged diameter section. The C-shaped ring material is fixed to the rear end of the first enlarged diameter part through the pipe, and only the outer end of the short third enlarged diameter part of the first pipe is bent by mechanical force until it almost touches the outer periphery of the second pipe. It is characterized by compressing and biting the ring material into the outer periphery of the second pipe.

(Example) The attached drawings show an example of the method of the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a longitudinal sectional view of the first pipe, and Fig. 3 shows manual pushing of the second pipe. Fig. 4 is a vertical cross-sectional view of the tool aS.
FIG. 5 is a vertical cross-sectional view showing the bending of the outer end of the third enlarged diameter portion, and FIG. 6 is a partial vertical cross-sectional view of the product.

In the figure, 1 is the first pipe and 2 is the TiS2 pipe, which are made of thin stainless steel pipes with the same diameter and the same thickness, and after connection, the second pipe becomes the #&1 pipe.

The first pipe 1 has a first enlarged diameter part 3 having a rear end 3a that locks the pipe 1i2a by making contact with the inner surface of the @2 pipe which is fitted from one end 1a corresponding to the m2 pipe, and a first enlarged diameter part 3. 3. A second enlarged diameter portion 4 having a tapered surface 5 at the rear end. and the second
In addition to providing a short third enlarged diameter section 6 which is further enlarged in diameter than the enlarged diameter section 4 and has a tapered surface 7 at the rear end, the first pipe 1
Hard ring-shaped rubber gaskets 8 are fitted over the length slightly protruding from the second expanded diameter portion 4 to the third expanded diameter portion 6 and supported by the tapered surfaces, and deformation prevention collars 9 are provided on the end surfaces of the rubber gaskets. The C-shaped ring material 10 is fitted into the short third enlarged diameter portion 6 and supported by the tapered surface 7, and as shown in FIG. The second tube 2 is brought into almost close contact with each inner surface of the enlarged diameter portion 3, passed through by hand, and locked in the inner part ya3a.

A is a tool that is fitted into the first tube and has a thin outer diameter and a long tip a in contact with the outer circumferential surface of the first enlarged diameter section 3 and the inclined surface of the outer surface of the tapered surface 5 of the second enlarged diameter section 4. , 7- The structure is such that it is firmly fitted into the first tube 1 and that it can be easily separated into two pieces in the axial direction together with tools (c) and (c) to be described later and can be easily fitted and removed.

In order to receive the striking force of the tool C, a small slope b' is brought into contact with the outer surface of the tapered surface 7 of the third enlarged diameter part 6, and the outer periphery of the second enlarged diameter part 4 and the tip a' of the tool a are connected. It is a tool with a concave cross section that is slidably fitted onto a part of the outer periphery. C is slidably fitted into the second pipe, and the inclined surface C is brought into contact with the tip of the third enlarged diameter part 6 (one end 1a of the first pipe 1), and the third enlarged diameter part 6 is attached to the outer periphery of the second pipe. Bend the C-shaped ring material 10 until it almost touches rjS2.
This is a bending tool that is made to cut into the pipe 2, and a long hole C' passing through the outer surface of the $2 enlarged diameter part 4 is provided following the above-mentioned inclined surface C', and the above-mentioned hole C' is provided at the back of the hole C'1. An inclined surface c'' parallel to the inclined surface C is provided, and the tool abuts against the tool a as shown in FIG.

As described above, this embodiment includes a ring-shaped rubber gasket 8,
Insert the second tube 2 by hand into the first tube 1 fitted with the collar 9 and the C-shaped ring material 10, and then fix the tool a and the tool chair to the first tube 1 or fix them freely or fit them in place. Furthermore, the inclined surface C' of the tool C corresponds to the tip 1a of the first pipe 1, and it is slidably fitted into the second pipe as specified (Fig. 4), and the tool C is moved in the arrow direction as shown in Fig. 5. When the third enlarged diameter portion 6 is driven into the second tube 2 by the inclined surface C', it is bent into a "h" shape until it almost touches the second tube 2, thereby contracting the C-shaped ring material 10 in the radial direction, and causing the second tube 2 to contract. While compressing the outer periphery with the C-shaped ring material 10 to form the annular groove 11, the C-shaped ring material 10 is compressed into the annular groove 11.
to connect the first pipe and the second pipe immovably. On the other hand, the ring-shaped rubber gasket 8 is compressed and the second enlarged diameter portion 4
It bites into the back end (tapered surface 5) from the axial direction, and #
The C-shaped ring material 10 is brought into close contact with the outer periphery of the S2 pipe, causing almost the contraction of the cup, and the C-shaped ring material 10 is inserted into the second pipe 2 as described above.
into the hole so that an annular groove 11 is formed.

(Effects) The present invention consists of a first tube 1 and a second tube 2 having the same diameter and the same thickness,
After the connection, the second pipe 2 becomes the first pipe 1, and the first enlarged diameter part 3 has a rear end 3a that connects the second pipe 2 which is fitted from one end 1a of the first pipe. , a second enlarged diameter part 4 whose diameter is enlarged more than the first enlarged diameter part 3 and has a tapered surface 5 at the rear end;
The first pipe 1 is provided with a short third enlarged diameter part 6 whose diameter is enlarged more than the second enlarged diameter part 4 and a tapered surface 7 is formed at the rear end, and the second enlarged diameter part of the first pipe 1 is provided. A hard ring-shaped rubber packing 8 is attached to the end surface of the rubber packing over a length slightly protruding from the third enlarged diameter part 4 to the third enlarged diameter part 6, and a C-shaped ring is attached to the third enlarged diameter part. 10, and pass the second tube 2 by hand through the inner surfaces of the C-shaped ring material 10, the collar 9, the ring-shaped rubber packing 8, and the first enlarged diameter portion 3 of the first tube, almost in contact with each other. The outer end of the third enlarged diameter portion 6 of the first tube 1 is bent with a tool until it almost touches the outer periphery of the second tube 2 to reduce the diameter of the C-shaped ring material 10 in the radial direction. A method of connecting the first pipe and the second pipe by biting into the outer periphery of the second pipe 2, the first enlarged diameter part 3 and the second enlarged diameter part are inserted from the back only at one end of the pipe. 4. It can be constructed using a press that sequentially forms the third enlarged diameter part 6, a ring-shaped rubber packing 8, a collar 9, and a C-shaped ring material 10, and has high reliability against leakage and is easy to use. The effect is that it can be easily carried out using only a few tools and a handheld soldier who approaches the tools in a striking manner.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the method of the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a longitudinal cross-sectional view of the first tube, and Fig. 3 is a longitudinal cross-sectional view showing the second tube being pushed in by hand or the like. , Figure 4 shows tools a and b.
, c, FIG. 5 is a vertical cross-sectional view showing the bending of the end of the third enlarged diameter portion, and FIG. 6 is a partial vertical cross-sectional view of the product. 1 → First pipe 2 → Second pipe 3 → First enlarged diameter part 3a → Back end
4 → Expanded diameter part 5 → Tapered surface 6 → Third expanded diameter part 7 Tapered surface 8 → Hard ring-shaped rubber gasket 9 → Collar 2 10 → C-shaped ring material 1 → Ring groove

Claims (1)

[Claims] 1) A connecting pipe consisting of a first pipe and a second pipe with the same diameter and the same thickness, where the second pipe becomes the first pipe after connection, and the rear end of which the second pipe is locked to the first pipe. a first enlarged diameter part having a larger diameter than the first enlarged diameter part and a tapered surface at the rear end; A short third enlarged diameter portion is provided, and a short third enlarged diameter portion is provided.
A hard ring-shaped rubber packing is attached over a length slightly protruding from the enlarged diameter part, a collar for preventing deformation is attached to the end face of the rubber packing, a C-shaped ring material is fitted to the third enlarged diameter part, and a C-shaped ring material is fitted to the third enlarged diameter part. The second pipe is manually passed through the C-shaped ring material, the collar, the ring-shaped rubber packing, and the inner surface of the first enlarged diameter part in almost close contact with each other, and is locked to the inner end of the first enlarged diameter part. , the short third of the first tube
A method for connecting pipes, comprising: compressing the C-shaped ring material by bending the outer end of the enlarged diameter portion until it almost touches the outer periphery of the second pipe, and biting the ring material into the outer periphery of the second pipe.