JPH07233895A - Conduit blocking execution method and blocking device used in the execution - Google Patents

Abstract

PURPOSE:To block up a conduit made of poured resin without using an air bag as in the past, by installing bag-shaped porous body at the top end part of a cylindrical body and holding the resin poured into the conduit in the bag- shaped porous body. CONSTITUTION:When the intermediate part of a conduit 1 is cut off, a saddle- shaped installation part 2 is set on the conduit 1 and installed on the conduit 1 through the tightening by a belt 2b, and an opened port 1a is formed on the conduit 1 by a hole saw 3b. A tube 6 is connected at the basic end part of the cylindrical part 3, and after a valve 7 is set to an opened cock state, a resin A is sent into the through hold 3a of the cylindrical part 3. In the process where the resin A is sent into the conduit 1, a bag-shaped porous body 5 installed at the top end part of the cylindrical body 3 fulfills the function of holding the poured resin A, and on the basis of this holding, the trouble that the resin A is washed away by the gas flow in the conduit 1 can be averted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit blocking method for blocking a live conduit in the middle thereof, and a blocking device used for carrying out the method.

[0002]

2. Description of the Related Art As a conventional method for shutting off a conduit in a live tube state at an intermediate part, an opening is formed in the intermediate part by using a piercing means, and an air bag inserted into the conduit through the opening is used. A method of expanding to a state where it can be shut off was adopted.

[0003]

When the shutoff is realized by such a conventional method, even if a part of the conduit is opened, the fluid to be conveyed in the conduit (hereinafter referred to as the fluid in the conduit) is exposed to the outside. Since it is necessary to form an opening large enough to insert the air bag in the middle of the conduit while realizing a leak-free no-blow state, a large-scale device is required and the construction is troublesome. There was a problem of becoming. Moreover, the chips and the like that are generated during the formation of the opening and remain in the conduit damage the air bag inserted into the conduit, and due to the damage, the air bag bursts and the inside of the pipe is broken. There is a problem that fluid may leak from the opening. Therefore, in the middle portion of the conduit, an opening smaller than the opening is bored, a resin is injected into the middle portion from the opening, and the resin is cured to fill the middle portion, The present inventors have already studied a method of blocking at an intermediate portion (hereinafter referred to as a comparative example). However, even in such a comparative example, there are problems to be solved as described below. That is, there is a problem that it may be difficult to fill the inside of the conduit with the resin when the diameter of the conduit is large. Further, even if the filling of the resin can be realized once, since the flow of the fluid in the pipe is always generated in the conduit, the flow causes the filled resin in the conduit to be washed away, and There is a problem that the conduit may not be effectively blocked. These problems tended to be particularly remarkable when the diameter of the conduit is large or when the fluid pressure in the conduit is high and the fluid in the conduit is flowing violently. The present invention has been made by paying attention to such an actual situation, and an object thereof is to provide means capable of solving the above-mentioned problems of the conventional method and the problems of the comparative example all at once.

[0004]

A conduit blocking method according to the present invention (hereinafter referred to as the method of the present invention) is a conduit blocking method for blocking a live conduit at an intermediate portion, and an opening is provided at the intermediate portion. A tubular body provided with a bag-shaped porous body at its tip portion is inserted into the opening while being bored, and the tip portion is positioned in the conduit, and then the resin is introduced through the tubular body into the conduit tube. By injecting into the inside, by filling the resin in the middle part while inflating the bag-shaped porous body in the conduit,
It is characterized in that it shuts off in the middle part.

A shutoff device according to the present invention (hereinafter referred to as the present invention device) is a saddle-shaped device that can be mounted in a saddle shape on a conduit to be shut off and that has a female screw hole that penetrates in the pipe radial direction in the mounted posture. A mounting portion and a through hole as a resin flow path are formed in the longitudinal direction, a male screw portion that can be screwed into the female screw hole is formed on at least a part of the outer peripheral surface, and a bag-shaped porous body is incorporated. A cylindrical part with a hole saw at the tip,
An operating portion for freely rotating the tubular portion, a tube for resin supply connected to the base end of the tubular portion so that the inside communicates with the through hole, the through hole and the tube. It is characterized in that it is provided with a valve that can open and close a communication passage that communicates with the inside.

[0006]

In the case of shutting off the conduit by the method of the present invention having the above-mentioned features, first, the tubular body is inserted into the bored opening and the tip of the tubular body is positioned inside the conduit. Then, the resin is injected into the conduit through the tubular body, but since the bag-shaped porous body is provided at the tip of the tubular body, the resin injected into the conduit (hereinafter, (Injected resin) is tied to the bag-shaped porous body, and the situation in which the resin in the conduit is swept away by the flow of the fluid in the tube is avoided. As described above, it can be effectively performed without using an air bag. When the pipe diameter of the conduit is large, by setting the size of the bag-shaped porous body to a large size in accordance with the pipe diameter, the blocking of the conduit by the injected resin can be effectively performed. .

[0007]

Therefore, when the conduit is shut off by the method of the present invention having the above-mentioned characteristics, it is not necessary to use an air bag as in the conventional case. Therefore, an opening of a size capable of inserting the air bag. No need for a large-scale device for forming (i.e., a simple device for forming a small opening required for injecting the resin), easy construction, and the above-mentioned method based on the rupture of the airbag. The leakage of the fluid in the pipe can be avoided, and the problems of the conventional method described above can be solved. Moreover, as described above, based on the locking of the injected resin by the bag-shaped porous body,
Since the situation where the injected resin is swept away by the flow of the fluid in the pipe is avoided, the problem of the comparative example described above that the conduit may not be effectively blocked by the injected resin may be solved. . As a result, the problems of the conventional method and the problems of the comparative example described above are solved all at once, and the object of the present invention is achieved.

When the device of the present invention having the above characteristics is used, the saddle-shaped attachment portion with the female screw hole is attached to the conduit to be blocked in a saddle-like shape, and then the cylinder is inserted into the female screw hole. While the male screw portion of the cylindrical body is screwed, the tubular body is screwed by the operation of the operation portion (at this point, the valve is in the closed state), so that the opening in the conduit can be easily performed. Can be formed. Then, after forming the opening, after connecting the tube to the base end of the tubular portion and opening the valve, the resin is fed into the through hole via the tube, and further in front of it. By feeding the resin into the conduit and connecting it to the bag-shaped porous body, the resin can be easily filled in a predetermined position in the pipe. Therefore, by using the above-mentioned device of the present invention, the above-mentioned actions and effects by the implementation of the method of the present invention can be surely realized.

In the method of the present invention, it is possible to use a simple hole saw instead of the above-mentioned device of the present invention to form the opening. When a simple hole saw is used, the simple hole saw is removed after the opening is formed, and a resin filling cylinder separate from the hole saw is inserted into the opening exposed by the removal.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a breaking device as an embodiment of the device of the present invention. 2 to 3 sequentially show a state in which the method of the present invention is carried out by using the blocking device.

As shown in FIG. 1, the shut-off device can be mounted in a saddle-like manner on a conduit 1 (a gas pipe in this embodiment) to be shut off, and is a female member that penetrates in the radial direction in the mounted posture. A saddle-shaped mounting portion 2 having a screw hole 2f and a through hole 3a as a resin flow path are formed in the longitudinal direction.
A male screw portion 3m that can be screwed with f is formed on at least a part of the outer peripheral surface (in the present embodiment, at the tip portion), and a hole saw 3b in which the bag-shaped porous body 5 is housed is provided at the tip portion. Cylindrical part 3 and operation part 4 for freely rotating the cylindrical part 3
And the inside of the through-hole 3 with respect to the base end of the tubular portion 3.
a tube 6 for resin supply connected so as to communicate with a
And a valve 7 that can open and close a communication passage formed by the inside of the through hole 3a and the inside of the tube 6 communicating with each other.

More specifically, the saddle-shaped mounting portion 2 is
A saddle-shaped abutment portion 2a, which can be abutted against the conduit 1 in a saddle shape, is provided, and the center of the saddle-shaped abutment portion 2a is formed with an internal surface of the female screw hole 2f. A hole has been opened. Then, the state in which the saddle type contact portion 2a is abutted against the conduit 1 is fixed by fastening the belt 2b additionally attached to the lower edge of the saddle type contact portion 2a. It has become. In addition, the cylindrical portion 3 with the hole saw 3b is fitted in the cylindrical portion 2d having a through hole communicating with the central hole formed in the central longitudinal direction, and the inner fitting state of the cylindrical portion 3 is An annular lid body 10 that covers the upper surface portion in a sealed state via an O-ring 9 is fixed to the cylindrical portion 2d by screwing.

As the bag-shaped porous body 5 installed in the hole saw 3b, there are a bag-shaped body having a net formed therein, and a sheet forming the bag body having a large number of small holes previously formed therein. Conceivable. And, these bag-shaped porous bodies 5 are
The periphery of the opening is attached to the inner peripheral surface of the hole saw 3b so that the hole saw 3b is internally provided with the hole saw 3b.

More specifically, the operating portion 4 is constituted by a portion in which an appropriate portion on the base end side of the tubular portion 3 is expanded into a hexagonal nut shape. Then, by rotating the wrench engaged with the operating portion 4, the cylindrical portion 3 is rotated for realizing the perforation by the hole saw 3b.

More specifically, the valve 7 is a base end portion of the tubular portion 3 (the tube 6 is provided at the base end portion thereof).
(The mounting portion 3d is formed) and the operation portion 4 is provided in the intermediate portion.

Using the device of the present invention having such a structure,
When shutting off the middle portion of the conduit 1, first, as shown in FIG. 2 (a), the saddle-shaped mounting portion 2 is directed to the conduit 1 and then the belt 2b is fastened to the device of the present invention. After that, the tubular portion 3 is rotated by the operation of the spanner to realize perforation by the hole saw 3b as shown in FIG. 2B, thereby forming the opening 1a in the conduit 1. At this point, the valve 7 is closed and the tube 6 is removed. And
After connecting the tube 6 to the base end of the tubular portion 3 and opening the valve 7, the resin A (specifically, a two-liquid mixed type silicone foam, rear,
(The one that foams and cures after a lapse of a certain time) is fed into the through hole 3a of the tubular portion 3 and further opened into the conduit 1 in front thereof.
After being sent out via a as shown in FIG. 2 (c), the resin A is cured to form a pipe blocking portion B in the conduit 1 as shown in FIG. Make a cutoff. By the way, in the process in which the resin A is fed into the conduit 1, the bag-shaped porous body 5 provided at the tip of the tubular body 3 holds the injected resin A, as shown in FIG. 2C. As a result, the function is fulfilled and, based on the connection, the situation where the resin A in the conduit 1 is swept away by the gas flow can be avoided.

Next, another embodiment will be described. Although the conduit is a gas pipe in the above-described embodiments, the conduit may be a pipe such as a water pipe that allows a fluid other than gas to flow therethrough. Further, the resin is not limited to the above.

Further, it is not necessary to use the above-described apparatus of the present invention to carry out the method of the present invention. For example, the conduit 1
In the process of forming the opening 1a, a mere hole saw is used, and after the opening 1a is formed using the hole saw, the mere hole saw is removed, and the opening 1a exposed by the removal is separated from the hole saw. Alternatively, the resin filling cylinder may be inserted.

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

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the device of the present invention.

FIG. 2 is an explanatory view showing a procedure of the method of the present invention (No. 1)

FIG. 3 is an explanatory view showing the procedure of the method of the present invention (No. 2)

[Explanation of symbols]

 1 conduit 1a opening 2 saddle-shaped mounting portion 2f female screw hole 3 tubular portion 3a through hole 3b hole saw 3m male screw portion 4 operating portion 5 bag-shaped porous body 6 tube 7 valve A resin

Claims (2)

[Claims] 1. A conduit blocking method for blocking a live conduit (1) at an intermediate portion thereof, wherein an opening (1a) is formed at the intermediate portion and a bag-shaped porous body (5) is provided at a tip portion. After inserting the tubular body (3) provided in the opening (1a) into the opening (1a) and positioning the tip of the tubular body (3) in the conduit (1), the resin (A) is passed through the tubular body (3). Is injected into the conduit (1) to inflate the bag-shaped porous body (5) in the conduit (1), and the resin (A) is filled in the intermediate part, thereby forming the intermediate part. Conduit cutoff method to cut off at 2. A saddle-shaped mounting portion (2), which can be mounted in a saddle shape on a conduit (1) to be shut off, and which has a female screw hole (2f) penetrating in a pipe radial direction in a mounting posture. A through hole (3a) as a flow path is formed in the longitudinal direction, and a male screw portion (3) that can be screwed into the female screw hole (2f).
m) is formed on at least part of the outer peripheral surface, and the hole saw (3b) having the bag-shaped porous body (5) inside is provided at the tip end of the tubular part (3), and the tubular part (3). ) Is rotatable, and a tube (6) for resin supply, which is connected to the base end of the tubular portion (3) so that the inside communicates with the through hole (3a). ) And a valve (7) capable of opening and closing a communication passage formed by communication between the through hole (3a) and the inside of the tube (6).