JPH0729080B2 - Inner pipe lining tool for city gas supply pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a coil spring wire for feeding and withdrawing from a metal gas supply pipe for a city gas, a spherical guide and a lining object at the tip of the former. Also, the present invention relates to a pipe inner surface lining tool for a city gas supply pipe, which is mounted in a state in which they are located close to each other, and a tube for injecting a liquid lining material near the lining object is passed through the coil spring wire.

[Conventional technology]

Conventionally, a pipe inner surface lining tool has not been provided with a spherical guide or a means for detecting whether or not a lining object has reached a connection portion between a city gas supply pipe and a main pipe (main pipe or branch pipe).

Therefore, first insert an appropriate pipe side length jig into the supply pipe, measure the length of the supply pipe, and then pull out the pipe side length jig.
The pipe inner surface lining tool is fed into the supply pipe so that the spherical guide and the lining object reach the connection between the supply pipe and the main pipe according to the measured length of the supply pipe, and the liquid lining material is fed into the supply pipe by the tube. While the liquid was being supplied, the spherical guide and the lining object were pulled out, and the liquid lining material was applied to the inner surface of the supply pipe with the lining object.

[Problems to be solved by the invention]

However, since the length of the supply pipe and the lining process must be performed in separate steps, the work is troublesome, and the feeding position of the spherical guide or lining object is accurately measured at the connection between the supply pipe and the main pipe. It is difficult to combine them, it is easy to accidentally put the liquid lining material into the main pipe to reduce the effective diameter of the main pipe, and it is easy to cause inconvenient situations in which part of the supply pipe is not lined, so work efficiency and reliability of lining process There was room for further improvement in sex.

An object of the present invention is to enable the work of feeding the spherical guide or the lining object into the connection portion between the city gas supply pipe and the main pipe to be performed efficiently and accurately.

[Means for solving problems]

A characteristic configuration of the present invention is that a coil spring-shaped wire provided with a lining object for a city gas supply pipe and a liquid lining material injection tube, and a spherical guide attached to the tip of the wire have an electrically insulating material interposed. Mounted, the spherical guide is formed of a conductive material and connected to an electric wire, and a power source is connected to the coil spring-shaped wire and the electric wire, to the power supply circuit including the coil spring-shaped wire, the supply pipe, the spherical guide and the electric wire, The detection means for detecting whether or not the spherical guide is in contact with the supply pipe is provided, and the function and effect thereof are as follows.

[Action]

In other words, when feeding the pipe inner surface lining tool to the metal supply pipe, the spherical guide and the coil spring wire contact the supply pipe, current flows in the power supply circuit, and the spherical guide is applied to the main pipe considerably larger in diameter than the supply pipe. When it reaches, the spherical guide separates from the supply pipe and the main pipe, and the power supply circuit stops the current for about 3 seconds, for example. Based on the current stop, the detection means can detect that the spherical guide has reached the main pipe.

Then, if necessary, pull out the coil-spring-shaped wire for a predetermined length, then start injecting the liquid lining material by the tube, and further pull out the lining object, and while eliminating the lining material supply into the main pipe, The lining process over the entire length can be reliably executed.

Moreover, since the pipe inner surface lining tool is only fed in and pulled out, the number of steps can be reduced as compared with the above-mentioned conventional technique, and the work can be performed efficiently.

〔The invention's effect〕

As a result, the inner lining of the city gas supply pipe can be constructed without excavating and cutting the connection part between the supply pipe and the main pipe, and it is possible to perform good lining processing in a reliable state with excellent work efficiency. It is now possible to provide an inner lining tool for city gas supply pipes.

〔Example〕

 Next, examples will be shown.

As shown in FIG. 1, a coil spring wire (3) is provided with a spherical guide (1), a liner finishing object (5) having a diameter larger than that of the guide (1), and two lining objects (6). The tubes (7) for injecting the liquid lining material are inserted into the coil spring wire (3) in such a manner that they are arranged side by side from the distal end to the proximal end side, and the coil spring wire (3) and the tube ( 7) While rotating, it is wound around a storage drum (4) that can be freely fed and taken up, a lining material injection device (11) is connected to the tube (7), and a coil spring wire (3) is rotated in the city. The lining material, which is fed into and drawn out from the gas supply pipe, is injected into the supply pipe (2) by the tube (7) and applied to the inner surface of the supply pipe (2) as the lining object (6) is drawn out. It is formed the order of the inner surface lining tool.

When the two bent metal wires (8) are projected to the tip side of the spherical guide (1) and both ends of each are fixed to the spherical guide (1), they are substantially cross-shaped in a front view. Supply pipe (2)
The spherical guide (1) is configured so as to smoothly and surely pass through the curved portion.

As shown in FIG. 1 and FIG. 3, two lining objects (6) are fixed to the coil spring wire (3), and the coil spring wire (3) is fixed at a fixed position in the longitudinal direction. The lining finishing object (5) is slidably fitted onto the coil spring wire (3) over the attached spherical guide (1) and the lining object (6).

That is, when the coil spring wire (3) is fed into the supply pipe (2), the lining finishing object (5) approaches the lining object (6) as shown in FIG. Due to the bending of the coil spring wire (3) between the finishing object (5) and the spherical guide (1), the spherical guide (1) is configured to easily pass through the bent portion of the supply pipe (2). . When the coil spring wire (3) is pulled out of the supply pipe (2), the lining finishing object (5) approaches the spherical guide (1) as shown in FIG. The contact of (1) with the lining material applied to the supply pipe (2) can be suppressed by the position regulation of the spherical guide (1) by the lining finishing object (5), and a good lining treatment can be performed. I am doing it.

As shown in FIG. 2, a contraction tube (14) made of an electrically insulating material is fitted over the tip of a coil spring wire (3) made of an electrically conductive material, and a spherical guide (1) made of an electrically conductive material such as brass is attached. , An electric wire (1) electrically insulated by a contraction tube (14) and connected to a coil spring wire (3) by a screw (9) and covered with an electrically insulating cover (10a).
0) is passed through the tube (7) and connected to the spherical guide (1) by the screw (9), and the coil spring wire (3) and the electric wire (10) are connected to the DC power source (12) to form the coil spring. One of the linear wire (3) and the electric wire (10) is formed as a positive electrode (A) of the electrode for contacting the city gas supply pipe (2) and the other is formed as a negative electrode (B).

A magnet (13) is attached to the spherical guide (1) so that the spherical guide (1) can be surely brought into contact with the supply pipe (2) even in the vertical pipe portion of the supply pipe (2).

In short, when feeding the city gas into the metal supply pipe (2), the coil spring wire (3) and the spherical guide (1) are brought into contact with the supply pipe (2) as electrodes (A) and (B), The power supply circuit including the supply pipe (2) and the electrodes (A) and (B) can be formed.

In the power circuit, a spherical guide (1) as an electrode (B)
Is provided with a detecting means (15) for detecting whether or not the contact means is in contact with the supply pipe (2), and when the detecting means (15) is de-energized for a set time of about 3 seconds, the spherical guide (1) causes the main pipe to move. A buzzer or a lamp is used to notify the user of the arrival at the above condition, and the pipe inner surface lining tool is provided with the length measuring function of the supply pipe (2).

That is, as shown in FIG. 3C, the spherical guide (1)
When it reaches the large-diameter main pipe (16) from the small-diameter supply pipe (2), it is separated from the large-diameter main pipe (16), and that state is detected by the detection means (15) to form a coil spring shape. Stop feeding the wire (3) into the pipe, pull out the coil spring wire (3) by a predetermined length if necessary, and then start injecting the lining material with the tube (7) and lining it into the main pipe (16). The lining process for the entire length of the supply pipe (2) can be surely executed while eliminating the material supply.

[Another embodiment]

 Next, another embodiment will be described.

Spherical guide (1) and coil spring wire (3)
The connecting structure of can be changed appropriately, and for example, the spherical guide (1) can be relatively rotatably connected so as not to rotate during withdrawal.

Spherical guide (1) and coil spring wire (3)
The specific means for electrically insulating the can be appropriately changed, and they are collectively referred to as an electrical insulating material (14).

The specific structure and material of the spherical guide (1) can be appropriately changed, for example, those without the metal wire (8).

The lining finishing object (5) and the lining object (6) can be appropriately changed in shape, material, structure, number, size, etc., and may or may not be integrally rotated with the coil spring wire (3). Of course, it is sufficient if at least one lining object (5), (6) is provided near the spherical guide (1).

The electric wire (10) can be appropriately changed in connection structure and arrangement with the spherical guide (1), and may be passed, for example, between the coil spring wire (3) and the tube (7).

The specific configuration of the detection means (15) and the detection method can be appropriately changed, and for example, a general ammeter, an electric resistance measuring instrument, etc. may be used.

The means for feeding and withdrawing the coil spring wire (3) from the tube in a rotating state can be changed appropriately,
For example, the coil spring-shaped wire (3) is rotated in the forward or reverse direction or in one direction by the rotation of the storage drum (4) or chuck, and the coil spring-shaped wire (3) is rotated by the female screw, the roller, or the caterpillar. It may be fed in and pulled out by driving.

The type of city gas may be natural gas, propane gas, butane air gas, coal-based gas, or any other type.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a conceptual view of the entire tool, FIG. 2 is an explanatory view of main parts, and FIGS. (1) …… Spherical guide, (2) …… Supply pipe, (3) ……
Coil spring wire, (5), (6) ... object for lining, (7) ... tube, (10) ... electric wire,
(12) …… Power supply, (14) …… Electrical insulation material, (15) …… Detection means.

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Fumio Tsukimoto 5-1, Hirano-cho, Higashi-ku, Osaka City, Osaka Prefecture Osaka Osaka Gas Co., Ltd. Inside the rubber factory (72) Inventor Tetsuo Rokuhara, 4-5 Minamihorie, Nishi-ku, Osaka-shi, Osaka Prefecture Tokawa Rubber Co., Ltd. (72) Toshiaki Shinzo 1-6-19, Morinomiya-chuo, Higashi-ku, Osaka-shi, Osaka No. Togawa Giken Co., Ltd.

Claims (1)

[Claims] 1. A spherical guide (1) and a lining object (5), (6) are attached to a coil spring wire (3) for feeding in and drawing out from a metal gas supply pipe (2) for city gas. The lining objects (5) and (6) attached at the tips and close to each other.
A pipe inner surface lining tool for a city gas supply pipe, in which a tube (7) for injecting a liquid lining material is passed through the coil spring wire (3) in the vicinity of the pipe, the spherical guide (1) and the coil spring. The electrical insulation material (14) is interposed between the wire-shaped wires (3), the spherical guide (1) is formed of a conductive material and connected to the electric wire (10), and the coil spring-shaped wire (3) and the electric wire are connected. A power supply (12) is connected to (10), and the coil spring wire (3), supply pipe (2), spherical guide (1) and electric wire (1)
Inside the city gas supply pipe, a power supply circuit including 0) is provided with a detection means (15) for detecting whether or not the spherical guide (1) is in contact with the supply pipe (2). Surface lining tool.