JPH03230829A - Method for connecting tubes - Google Patents

Abstract

PURPOSE:To improve reliability and to make execution easy by inserting a tapered packing having shape holding power into an end part of a 1st tube into which a 2nd tube is inserted and with which it is connected and increasing mutually biting force between the 1st and the 2nd tubes. CONSTITUTION:A 1st tube expanding part 3 provided with a step part 4 is formed at the tube end of one side of each of the 1st tube 1 and the 2nd tube 2 which both are equal in dimension and thickness, continuously, the 2nd tube 2 is inserted into the internal periphery of the 1st tube 1 where the tapered 2nd tube expanding part 5 and the cylindrical 3rd diameter expanding part 6 are formed to lock it. A tapered packing 7 of high elastic material is inserted into the 2nd tube expanding part 5, further, ring-shaped springs 8 and a C-shaped material 9 are inserted between the 3rd diameter expanding part 6 and the 2nd tube 2. The end part of the 3rd diameter expanding part 6 of the 1st tube 1 is bent about 45 degrees so that it abuts nearly on the external periphery of the 2nd tube 2 and the ring-shaped springs 8 and the C-shaped material 9 are compressed and the C-shaped material 9 is bitten into the external periphery of the 2nd tube. In this way, reliability to leakage can be improved and execution in a working field can be simplified.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a pipe connection method, which consists of a first pipe and a second pipe having the same diameter and the same thickness, and after connection, the second pipe becomes the first pipe. In the connecting pipe, the first pipe and the second pipe are tightly connected by enclosing a tapered packing ring with circular shape retention force, and it is a method that can be easily carried out at a piping work site. .

(Conventional technology) Sanitary and water supply and drainage piping in buildings requires on-site connection of connecting pipes, and the connection methods include methods that use fittings and methods that connect pipes by welding, etc. Different methods are used to connect thin stainless steel pipes, etc. α has a high reliability with low risk of leakage at the connection points and low cost.
There is M.

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.

A simple construction method has not yet been developed in which an enlarged diameter section is provided at the end of the first pipe during construction, and the second pipe is directly inserted.

(Problems to be Solved by the Invention) In view of the above, the present invention provides a connection method in which a tapered packing ring with a shape-retaining force is fitted into the pipe end of the first pipe to which the second pipe is fitted and connected in an internally fitting manner. An object of the present invention is to develop a method for increasing the mutual biting strength of a first tube and a second tube by machining.

(Means for Solving the Problems) The pipe connection method of the present invention has solved the above-mentioned problems, and consists of a first pipe and a second pipe having the same diameter and the same thickness, and after connecting, In the connecting pipe which becomes the first pipe, a first enlarged diameter part with a stepped part is formed at one end of the pipe, and then a second enlarged diameter part with a tapered shape and a third enlarged diameter part with a cylindrical shape are formed. A second pipe is inserted into the inner periphery of the first pipe which has been formed with a metal or non-metallic material between the second pipe and the tapered second enlarged diameter part of the first pipe. A tapered packing ring made of a highly elastic material is fitted, and a ring-shaped bullet and a C-shaped member are fitted between the third enlarged diameter part and the second pipe, and the third enlarged diameter 4- part of the j@1 pipe is fitted. The ring-shaped bullet and the C-shaped member are compressed by bending the end portion to around 45°, almost touching the outer periphery of the second pipe, and the C-shaped member is bitten into the outer periphery of the second pipe. The present invention has an inventive step in that the connecting method of the present invention can be carried out by simply preparing the set and simple tools required for connection work or by bringing them to the work site.

(Example) The attached drawings are for explaining an example of the method of the present invention, in which Figures 1 and 2 are longitudinal sectional side views, Figure 3 is an exploded perspective view, and Figure 4 is a side view.
The figure shows a connection product made using the pipe connection method.

In the figure, reference numeral 1 denotes a first pipe, and a first enlarged diameter part 3 provided with a stepped part 4 is formed at one end 1a corresponding to the second pipe 2, and then a tapered second enlarged diameter part 3 is formed. part 5 and a cylindrical third enlarged diameter part 6, the second pipe 2 is inserted into the inner periphery as shown in FIG. A tapered packing ring 7 made of metal or a highly elastic material other than metal is fitted between the tapered second enlarged diameter portion 5 of the pipe, and further fjIJ3
A coil spring, a countersunk ring-shaped bullet A8, and a C-shaped member 9 are fitted between the enlarged diameter part 6 and the second pipe 2, and a part of the tool 11, which is split in two in the axial direction, is made into a taper 13. The hole portion 12 grips up to the tapered second enlarged diameter portion 5 of the first tube 1, and is further held at an angle of about 45° with the large diameter hole 15 covering the outer surface of the third enlarged diameter portion 6.
Grasp the #&2 pipe 2 as shown in Fig. 1 with the tool 14 which is split into two in the axial direction by forming an angular conical wall 16, and drive the tools 11 and 14 closer to each other as shown in Fig. 2. 2. The tube 2 is passed almost tightly from the inner periphery of the C-shaped member 9 and the ring-shaped bullet 8!8 to the inner periphery of the first enlarged diameter portion 3, and the tip thereof is engaged with the step portion 4, and the tapered shape Patsukin ring 7
into the tapered second enlarged diameter part 5 of the first pipe 1 in the axial direction, and bend a part of the cylindrical third enlarged diameter part 6 to approximately 45° so as to almost touch the outer periphery of the second pipe. Hollow 10 with semicircular cross section
is formed into the second pipe, and at the same time a ring-shaped bullet 8 and a C-shaped member 9 are formed.
Compress. The compressed ring-shaped bullet 8 is connected to the second enlarged diameter portion 5
It hardly touches the inner circumference of.

FIG. 4 shows a connected product X according to the method of the present invention.

(Effects) The method of the present invention consists of a first pipe and a second pipe with the same diameter and the same thickness, and after connection, the second pipe becomes @1 pipe.Especially in sanitary and water supply and drainage pipes such as thin stainless steel pipes, 7. - The second pipe 2 is inserted into the inner periphery of the first pipe 1 in which the first enlarged diameter part 3, the tapered second enlarged diameter part 5, and the cylindrical third enlarged diameter part 6 are sequentially formed, and the pipe end is A metal or non-metallic height member that locks onto the stepped portion 4 and acts semi-permanently as a strong shape-retaining material for the pipe connection between the second pipe 2 and the tapered second enlarged diameter portion 5 of the first pipe 1. A tapered packing ring 7 made of an elastic material is fitted, and a ring-shaped bullet 8!8 is inserted between the third enlarged diameter portion 6 of the first tube 1 and the second tube 2.
and the C-shaped member 9, and the end of the cylindrical third enlarged diameter part 6 (tube end 1
It is a. ) to approximately 45°, almost touching the outer periphery of the second pipe 2, to compress the ring-shaped bullet 8 and the C-shaped member 9,
In addition, according to the pipe connection method in which the C-shaped member 9 is bitten into the outer periphery of the second pipe 2, the compressed ring-shaped bullet 8 permanently connects the tapered packing ring 7 and the C-shaped member 98- in opposite directions. However, since the C-shaped member 9 forms a depression 10 and strongly captures the second tube, the packing ring 7 is inserted between the first and second tubes to provide shape retention force. The invention can be carried out using only a few tools and a hand-held device that allows the tools to approach each other in a striking manner, so the cost is low, and it can be easily carried out at the work site. This has the effect of making the implementation easier.

[Brief explanation of drawings]

The accompanying drawings are for explaining an embodiment of the method of the present invention, in which Figures 1 and 2 are longitudinal sectional side views, Figure 3 is an exploded perspective view, and Figure 3 is an exploded perspective view. *
Figure 4 shows a connected product made by the pipe connecting method of the present invention. 1 → First pipe 2 → Second pipe 3 → First enlarged diameter section 4 → Stepped section 5
→ Tapered second enlarged diameter part 6 → Cylindrical third enlarged diameter part 7 → Tapered packing ring 8 → Ring-shaped bullet 9 → C-shaped member

Claims (1)

[Claims] 1) In a connecting pipe that consists of a first pipe and a second pipe with the same diameter and the same thickness, and the second pipe becomes the first pipe after connection, the first enlarged diameter part has a step at one end of the pipe. , followed by a tapered second
A second pipe is inserted into the inner periphery of the first pipe, which has an enlarged diameter portion and a cylindrical third enlarged diameter portion, and is locked to the stepped portion, thereby forming a tapered shape of the second pipe and the first pipe. A tapered packing ring made of metal or a highly elastic material other than metal is fitted between the second enlarged diameter portion,
Furthermore, a ring-shaped bullet and a C-shaped member are fitted between the third enlarged diameter part and the second pipe, and the end of the third enlarged diameter part of the first pipe is brought to about 45 degrees, almost touching the outer periphery of the second pipe. A pipe connecting method characterized by compressing the ring-shaped bullet and the C-shaped member by bending and biting the C-shaped member into the outer periphery of the second pipe.