JPH11257569A - Connecting method for pipe branch pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an excellent workability and an excellent corrosion resistant property, and to prevent the water leaking and the like for a long period. SOLUTION: When a branch pipe 5 is connected to a drainage pipe main pipe 1 in which a thermal hardening resin layer is lined on the inner surface, a hole is formed to the thermal hardening resin layer 2 of a branch part 3, and after that, an inner tube body 10 which consists of an elastic material, and has a flange 11 for close contact at one end, is installed by positioning to contact closely the flange 11 on the inner peripheral surface of the drainage pipe main pipe 1, and then, the branch pipe 5 is connected to the drainage pipe main pipe 1 in the condition housing the inner tube body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a pipe branch pipe which is excellent in workability and excellent in corrosion resistance and can prevent water leakage for a long period of time.

[0002] For example, building drainage pipes of buildings and condominiums are stretched out endlessly such as on walls, floors, ceilings, etc. When the pipes are deteriorated and water leakage or clogging occurs, repair work is required. Becomes In this case, it is most preferable to replace the pipe with a new one.However, this requires a large amount of work and is difficult due to the cost and the number of working days. Therefore, as a simple repair method, the inner surface of the pipe has excellent corrosion resistance and mechanical strength. A method of lining a thermosetting resin layer having a thickness of about 3 to 40 mm (in the industry, referred to as an in-situ foam method) is known. On the other hand, it may be necessary to newly connect a branch pipe from the drain pipe to each floor or the like due to a change in arrangement of each room, etc., in this case, a hole is formed in the lined thermosetting resin layer to branch. The pipe will be connected to the pipe.

However, when a new branch pipe is connected, the connection between the drain pipe main pipe and the branch pipe at the branch point corrodes violently and immediately causing water leakage or the like.
Although the durability is improved by applying a corrosion-resistant paint or a rust-preventive paint to the connection portion of the branch pipe, there is a problem that sufficient durability cannot be secured. In addition, the connection of the branch pipe is performed for the drain pipe that is already piped, and the work that can be performed from outside is limited, and the workability is poor, so that sufficient durability treatment cannot be performed inside the pipe. There was a problem.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, can perform connection work easily and accurately, has excellent corrosion resistance, and has a long term water leakage. The present invention has been completed for the purpose of providing a method of connecting a pipe branch pipe capable of preventing such problems.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a method of connecting a pipe branch pipe according to the present invention is directed to a method of connecting a branch pipe to a drain pipe main pipe having an inner surface lined with a thermosetting resin layer. In connecting, after perforating the thermosetting resin layer of the branch portion, an inner cylindrical body made of an elastic material and having a flange for close contact at one end is formed in the hole, and the flange is formed inside the drain pipe main pipe. It is characterized in that it is aligned and inserted so as to be in close contact with the peripheral surface, and then the branch pipe is connected to the main drain pipe in a state where the inner cylindrical body is installed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The drawing shows a case where a new branch pipe is connected to a drain pipe laid on the wall of a building. In the drawing, 1 is a drain pipe main pipe, and 2 is a heat pipe made of, for example, a polyester resin lined therein. The curable resin layer 3 is a branch portion formed in the drain pipe main pipe 1, and the above configuration is basically the same as a drain pipe repaired by a conventional so-called in-situ form method.

In the present invention, after the thermosetting resin layer 2 of the branch portion 3 is perforated, the inner cylindrical body 10 formed of an elastic material and having a flange portion 11 for close contact at one end is formed in the hole portion 4. The flange 11 is positioned and inserted so as to be in close contact with the inner peripheral surface of the drain pipe main pipe 1.
Are connected in a state where the inner cylindrical body 10 is mounted. In other words, in the prior art, the durability is merely improved by applying a corrosion-resistant paint or a rust-preventive paint or the like in the vicinity of the hole 4.
By connecting with the interior installed, the contact of drainage near the connection is cut off, preventing corrosion at this part and ensuring semi-permanent durability,
The inner cylinder 10 is simply and accurately positioned and inserted from the outside.

The connection procedure of the present invention will be described below. First, as shown in FIG. 2, the thermosetting resin layer 2 of the branch portion 3 of the drain pipe main pipe 1 to be connected is perforated from the outside according to a conventional method. The inner cylindrical body 10 having the hole 4 formed therein and the flange 11 for close contact formed in the hole 4 is then moved to the inside of the drain pipe main pipe 1 by using elasticity. Press in from the outside until it does. The flange 11 is designed to have the same radius of curvature as the radius of curvature of the inner peripheral surface of the drain pipe main pipe 1, and is configured so that when both are adjusted to a predetermined position, they come into close contact with each other. Have been. Next, by appropriately rotating the inner cylindrical body 10, positioning is performed so that the flange 11 closely contacts the inner peripheral surface of the drain pipe main pipe 1. Finally, the branch pipe 5 may be connected to the drain pipe main pipe 1 by screwing or the like in a state in which the inner cylindrical body 10 is provided.

As shown in FIGS. 3 and 4,
A linear rib 12 protrudes from the inner peripheral surface of the inner cylindrical body 10 in a longitudinal direction, and a rib 20 is formed in the inner cylindrical body 10 by using an alignment jig 20 having a long groove 21 corresponding to the rib 12. 12 and the long groove 21 are inserted so as to coincide with each other, and the positioning jig 20 is rotated so that the flange 11 of the inner cylinder body 10 is completely brought into close contact with the inner peripheral surface of the drain pipe main pipe 1. Then, the positioning of both can be performed easily and accurately from the outside. Further, in the illustrated one, the alignment is completed when the long groove 21 of the alignment jig 20 is located directly below. Of course, the positional relationship can be selected. After the alignment is performed in this manner, the alignment jig 20 is taken out and the drain pipe main pipe 1 is removed.
Then, the branch pipe 5 may be connected by screwing or the like in a state in which the inner cylindrical body 10 is provided.

[0010] The branch pipe 5 connected as described above is completed.
Is connected in a state where the inner cylinder body 10 is installed, so that contact of drainage in the vicinity of the connection portion is cut off, corrosion at this portion is reliably prevented, and semi-permanent durability can be secured. Become. In addition, since all the connecting steps can be performed easily and accurately from the outside, workability is excellent, and construction can be performed in a short time and at low cost.

[0011]

As is apparent from the above description, the present invention can easily and accurately perform connection work, and is excellent in corrosion resistance, and can prevent water leakage or the like for a long period of time. Things. Therefore, the present invention is extremely significant as a method of connecting pipe branch pipes that has eliminated the conventional problems and contributes to industrial development.

[Brief description of the drawings]

FIG. 1 is a sectional view of a pipe connected according to the present invention.

FIG. 2 is a perspective view showing a step of inserting an inner cylinder in the embodiment of the present invention.

FIG. 3 is a side view showing the inner cylinder.

FIG. 4 is a perspective view showing an insertion step of a positioning jig according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage pipe main pipe 2 Thermosetting resin layer 3 Branch part 10 Inner cylinder 11 Flange part 12 Rib 20 Positioning jig 21 Long groove

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[Procedure amendment]

[Submission date] February 19, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Connection method of pipe branch pipe

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a pipe branch pipe which is excellent in workability and excellent in corrosion resistance and can prevent water leakage for a long period of time.

[0002] For example, building drainage pipes of buildings and condominiums are stretched out endlessly such as on walls, floors, ceilings, etc. When the pipes are deteriorated and water leakage or clogging occurs, repair work is required. Becomes In this case, it is most preferable to replace the pipe with a new one.However, this requires a large amount of work and is difficult due to the cost and the number of working days. Therefore, as a simple repair method, the inner surface of the pipe has excellent corrosion resistance and mechanical strength. A method of lining a thermosetting resin layer having a thickness of about 3 to 40 mm (in the industry, referred to as an in-situ foam method) is known. On the other hand, it may be necessary to newly connect a branch pipe from the drain pipe to each floor or the like due to a change in arrangement of each room, etc., in this case, a hole is formed in the lined thermosetting resin layer to branch. The pipe will be connected to the pipe.

However, when a new branch pipe is connected, the connection between the drain pipe main pipe and the branch pipe at the branch point corrodes violently and immediately causing water leakage or the like.
Although the durability is improved by applying a corrosion-resistant paint or a rust-preventive paint to the connection portion of the branch pipe, there is a problem that sufficient durability cannot be secured. In addition, the connection of the branch pipe is performed for the drain pipe that is already piped, and the work that can be performed from outside is limited, and the workability is poor, so that sufficient durability treatment cannot be performed inside the pipe. There was a problem.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, can perform connection work easily and accurately, has excellent corrosion resistance, and has a long term water leakage. The present invention has been completed for the purpose of providing a method of connecting a pipe branch pipe capable of preventing such problems.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a method of connecting a pipe branch pipe according to the present invention is directed to a method of connecting a branch pipe to a drain pipe main pipe having an inner surface lined with a thermosetting resin layer. When connecting, after piercing the thermosetting resin layer of the branch portion, an inner cylindrical body made of an elastic material and having a flange for close contact at one end is formed in the hole, and the flange is formed inside the drain pipe main pipe. A method for connecting a pipe branch pipe in which the pipe is aligned and inserted so as to be in close contact with the peripheral surface, and then connected to the main pipe of the drain pipe while the inner cylinder body is mounted therein,
A linear rib is protruded in the longitudinal direction of the inner peripheral surface of the body.
Place the alignment jig with the corresponding long groove in the inner cylinder
Insert the rib so that it matches with the long groove, and align it
By rotating the jig, the flange of the inner cylinder body becomes the inner peripheral surface of the drain pipe main pipe.
It is characterized in that it is positioned so as to be completely in close contact with the substrate .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The drawing shows a case where a new branch pipe is connected to a drain pipe laid on the wall of a building. In the drawing, 1 is a drain pipe main pipe, and 2 is a heat pipe made of, for example, a polyester resin lined therein. The curable resin layer 3 is a branch portion formed in the drain pipe main pipe 1, and the above configuration is basically the same as a drain pipe repaired by a conventional so-called in-situ form method.

In the present invention, after the thermosetting resin layer 2 of the branch portion 3 is perforated, the inner cylindrical body 10 formed of an elastic material and having a flange portion 11 for close contact at one end is formed in the hole portion 4. The flange 11 is positioned and inserted so as to be in close contact with the inner peripheral surface of the drain pipe main pipe 1.
Are connected in a state where the inner cylindrical body 10 is mounted. That is, in the prior art, the durability is merely improved by applying a corrosion-resistant paint or a rust-preventive paint or the like in the vicinity of the hole 4.
By connecting with the interior installed, the contact of drainage near the connection is cut off, preventing corrosion at this part and ensuring semi-permanent durability,
The inner cylinder 10 is simply and accurately positioned and inserted from the outside.

The connecting procedure of the present invention will be described below. First, as shown in FIG. 2, the thermosetting resin layer 2 of the branch 3 to be connected to the drain pipe main pipe 1 is perforated from the outside according to a conventional method. The inner cylindrical body 10 having the flange 4 for tightly contacting the hole 4 is formed into the drain pipe main pipe 1 by using elasticity. Press in from the outside until it does. The flange 11 is designed to have the same radius of curvature as the radius of curvature of the inner peripheral surface of the drain pipe main pipe 1, and is configured so that when both are adjusted to a predetermined position, they come into close contact with each other. Have been. Next, by appropriately rotating the inner cylindrical body 10, positioning is performed so that the flange 11 closely contacts the inner peripheral surface of the drain pipe main pipe 1. Finally, the branch pipe 5 may be connected to the drain pipe main pipe 1 by screwing or the like in a state in which the inner cylindrical body 10 is provided.

Further, as shown in FIGS. 3 and 4,
A linear rib 12 protrudes from the inner peripheral surface of the inner cylindrical body 10 in a longitudinal direction, and a rib 20 is formed in the inner cylindrical body 10 by using an alignment jig 20 having a long groove 21 corresponding to the rib 12. 12 and the long groove 21 are inserted so as to coincide with each other, and the positioning jig 20 is rotated so that the flange 11 of the inner cylindrical body 10 is completely in close contact with the inner peripheral surface of the drain pipe main pipe 1. To do
Thus , the positioning of both can be performed easily and accurately from the outside. Further, in the illustrated one, the alignment is completed when the long groove 21 of the alignment jig 20 is located directly below. Of course, the positional relationship can be selected. After the alignment is performed in this manner, the alignment jig 20 is taken out and the drain pipe main pipe 1 is removed.
Then, the branch pipe 5 may be connected by screwing or the like in a state in which the inner cylindrical body 10 is provided.

[0010] The branch pipe 5 connected as described above is completed.
Is connected in a state where the inner cylinder body 10 is installed, so that contact of drainage in the vicinity of the connection portion is cut off, corrosion at this portion is reliably prevented, and semi-permanent durability can be secured. Become. In addition, since all the connecting steps can be performed easily and accurately from the outside, workability is excellent, and construction can be performed in a short time and at low cost.

[0011]

As is apparent from the above description, the present invention can easily and accurately perform connection work, and is excellent in corrosion resistance, and can prevent water leakage or the like for a long period of time. Things. Therefore, the present invention is extremely significant as a method of connecting pipe branch pipes that has eliminated the conventional problems and contributes to industrial development.

[Brief description of the drawings]

FIG. 1 is a sectional view of a pipe connected according to the present invention.

FIG. 2 is a perspective view showing a step of inserting an inner cylinder in the embodiment of the present invention.

FIG. 3 is a side view showing the inner cylinder.

FIG. 4 is a perspective view showing an insertion step of a positioning jig according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an embodiment of the present invention.

[Description of Signs] 1 Drain pipe main pipe 2 Thermosetting resin layer 3 Branch section 10 Inner cylinder 11 Flange section 12 Rib 20 Positioning jig 21 Long groove

Claims (2)

[Claims] When connecting a branch pipe to a drain pipe main pipe having a thermosetting resin layer lined on an inner surface thereof, a thermosetting resin layer at a branch portion is pierced and then an elastic material is inserted into the hole. An inner cylindrical body having a flange for close contact at one end is aligned and inserted so that the flange closely contacts the inner peripheral surface of the main pipe of the drain pipe, and then a branch pipe is inserted into the main pipe of the drain pipe. A connection method for a pipe branch pipe, wherein the connection is performed while a tubular body is installed. 2. A linear rib is projected from an inner peripheral surface of the inner cylindrical body, and a positioning jig having a long groove corresponding to the rib is aligned with the rib in the inner cylindrical body. 2. The pipe branch pipe connecting method according to claim 1, wherein the positioning jig is rotated to position the flange portion of the inner cylindrical body so as to completely adhere to the inner peripheral surface of the drain pipe main pipe. .