JP6762894B2 - Emergency shutoff device for ejected gas and emergency shutoff method for ejected gas - Google Patents

Description

The present invention relates to a blocking tool for emergencyly blocking gas ejected from a damaged portion of a metal gas conduit (steel pipe, cast iron pipe, etc.) and a blocking method using the same.

It has been confirmed that metal gas conduits laid in the ground are damaged by contact with the working parts of construction machinery (power shovels, backhoes, etc.) used in other construction work around them. When the gas conduit is damaged, gas is ejected from the damaged part, so it is required to stop the gas ejection promptly.

As a method of temporarily shutting off such gas ejection, a blocking material in which a solidifying material and a hardening material are mixed is supplied or filled in the earth and sand around the damaged part of the gas conduit, and the surrounding earth and sand are hardened together with the damaged part. It has been proposed to block the gas (see Patent Document 1 below). It is also proposed to use an injection curing material with an adjustable curing time, inject and fill the injection curing material around the gas ejection point of the gas conduit or inside the gas conduit, and then cure it to shut off the gas. (See Patent Document 2 below).

JP-A-2007-57061 Japanese Unexamined Patent Publication No. 2011-220433

Although it is possible to shut off the ejected gas in an emergency with the above-mentioned conventional technique, the damaged part of the gas conduit is covered with a blocking material, or the damaged part of the gas conduit is filled with a hardening material. In the subsequent restoration work, it is necessary to remove the solidified earth and sand and the gas conduit filled with the hardening material, which causes a problem that the restoration work requires a lot of labor and time. there were.

In addition, although the blocking material and the curing material to be used have a short curing time in consideration of the urgency during work, it is inevitable that the curing will take a certain amount of time. For this reason, there is a demand for an emergency gas shutoff method that is even faster and safer.

The present invention has been proposed to deal with such circumstances. That is, according to the present invention, when shutting off the gas ejected from the damaged portion of the metal gas conduit, the gas is shut off promptly, and further, the restoration work after the shutoff can be easily performed. Is an issue.

In order to solve such a problem, the present invention has the following configurations.

A shut-off tool that urgently shuts off the gas ejected from the damaged part of the metal gas conduit, and is a sheet-shaped magnet that sticks to the surface of the metal gas conduit and an adhesive member that is attached to the suction surface of the sheet-shaped magnet. An ejected gas emergency shutoff device comprising the above, and a magnetic force suppressing member that is detachably attached so as to cover the suction surface of the sheet-shaped magnet.

In the present invention having such a feature, since the blocking device is handled with the magnetic force suppressing member attached to the suction surface of the sheet-shaped magnet, the suction surface is attracted to a place other than the damaged part of the metal gas conduit. The breaker can be quickly positioned on the damaged part. Then, in that state, the magnetic force suppressing member is peeled off from the suction surface, and the sheet-shaped magnet is attracted to the surface of the metal gas conduit so as to cover the damaged part with the adhesive member, so that the damaged part is quickly closed and the gas is closed. The eruption can be blocked.

In particular, when the magnetic force suppressing member is not attached to the suction surface of the breaker, when the breaker is temporarily placed at the work site, there is a problem that metal impurities such as sand iron are magnetically attracted to the suction surface. By attaching the magnetic force suppressing member to the suction surface, such a problem can be solved and the work can proceed smoothly.

At this time, since the soil around the damaged portion of the metal gas conduit is not hardened or the gas conduit is not filled with a hardening material, the restoration work can be performed quickly and easily after the gas is shut off.

It is explanatory drawing ((a) is a bottom view, (b) is a sectional view) which showed the ejected gas emergency shutoff device which concerns on embodiment of this invention. Explanatory drawing ((a) is a state where the breaker is moved to the damaged part, (b) is on the damaged part) which showed the usage method (the emergency shutoff method of the ejected gas) which concerns on embodiment of this invention. The magnetic force suppressing member is peeled off in (c), and the blocking tool is attracted to the damaged portion).

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different figures indicate parts having the same function, and duplicate description in each figure will be omitted as appropriate.

As shown in FIG. 1, the ejected gas emergency shutoff device (hereinafter referred to as a breaker) 1 is used to temporarily shut off the gas ejected from the damaged portion of the metal gas conduit, and is used for the sheet magnet 2 and the adhesive member. 3 and a magnetic force suppressing member 4 are provided.

The sheet-shaped magnet 2 is one that is attracted to the surface of a metal gas conduit, and includes a permanent magnet having a strong magnetic attraction force such as a neodymium magnet formed in a sheet shape (including a magnetized magnet after being molded into a sheet shape). ), And can be formed by bonding linear or granular magnets with a flexible resin (including a so-called magnet sheet).

The adhesive member 3 is for closing the damaged portion by coming into close contact with the damaged portion of the metal gas conduit, and a member conventionally effective as a gas blocking member such as butyl rubber can be used. The adhesive member 3 is attached to the suction surface of the sheet-shaped magnet 2. In the illustrated example, the adhesive member 3 is attached to the central portion of the suction surface of the sheet-shaped magnet 2. The area of the pressure-sensitive adhesive member 3 on the suction surface is appropriately designed, but it is preferable to increase the area of the suction surface exposed with respect to the area of the pressure-sensitive adhesive member 3.

The magnetic force suppressing member 4 is detachably attached so as to cover the suction surface of the sheet-shaped magnet 2. The magnetic force suppressing member 4 suppresses the magnetic attraction force on the suction surface of the sheet magnet 2 from reaching the metal surface, and has a predetermined thickness so that the suction surface of the sheet magnet 2 does not come close to the metal surface. Covers the suction surface with. The magnetic force suppressing member 4 may be a member as long as it can maintain a predetermined thickness, and a non-woven fabric, a cloth material, or the like may be used.

Further, the magnetic force suppressing member 4 can be used in a magnetic shield sheet or the like covered with a metal foil having a magnetic shielding effect such as nickel alloy or aluminum. A plurality of magnetic shield sheets can be stacked and used as needed in order to enhance the magnetic force suppressing effect.

The magnetic force suppressing member 4 is detachably attached to the suction surface of the sheet-shaped magnet 2. Specifically, the magnetic force suppressing member 4 can be attached to the suction surface by using a peelable double-sided tape or the like. In the illustrated example, the magnetic force suppressing member 4 is detachably attached at the center, and each can be separated independently. By making the magnetic force suppressing member 4 separable in this way, the magnetic force suppressing member 4 (4A) on one side is peeled off, and a part of the suction surface of the sheet-shaped magnet 2 is attracted to the surface of the metal gas conduit, and then By peeling off the magnetic force suppressing member 4 (4B) on the other side, the entire attraction surface of the sheet-shaped magnet 2 can be attracted to the surface of the metal gas conduit, and the sheet-shaped magnet 2 can be attracted to a required place with high accuracy. it can.

FIG. 2 shows a working process of an emergency shutoff method for ejected gas using the breaker 1. As shown in FIG. 2A, the blocking tool 1 is made to face the damaged portion Ps of the metal gas conduit P. At this time, since the suction surface of the sheet-shaped magnet 2 is covered with the magnetic force suppressing member 4, the blocking tool 1 does not attract the suction surface to an unnecessary place, and is accurately placed on the damaged part Ps. The blocking tool 1 can be arranged.

Next, as shown in FIG. 2B, the magnetic force suppressing material 4 is peeled off from the blocking tool 1, and the damaged portion Ps is covered with the adhesive member 3 of the blocking tool 1. After that, as shown in FIG. 2C, the magnetic force suppressing material 4 is completely peeled off from the suction surface of the blocking tool 1, and the sheet-shaped magnet 2 is attracted to the surface of the metal gas conduit P, whereby the adhesive member 3 The damaged part Ps is closed and the gas ejection is blocked.

According to such an emergency shutoff method for ejected gas using the breaker 1, the breaker 1 is handled with the magnetic force suppressing member 4 attached to the suction surface of the sheet-shaped magnet 2, so that the suction surface is the metal gas conduit P. The breaker 1 is quickly positioned on the damaged part Ps by eliminating the problem of sticking to the damaged part Ps other than the damaged part Ps and eliminating the problem of metal impurities such as sand iron adhering to the suction surface. be able to. Then, in that state, the magnetic force suppressing member 4 is peeled off from the suction surface, and the sheet-shaped magnet 2 is attracted to the surface of the metal gas conduit P so as to cover the damaged portion Ps with the adhesive member 3, so that the damaged portion is quickly damaged. The Ps can be blocked to block the gas ejection.

1: Ejected gas emergency shutoff (blocker), 2: Sheet magnet, 3: Adhesive member,
4: Magnetic force suppression member

Claims (3)

It is a shut-off device that temporarily shuts off the gas ejected from the damaged part of the metal gas conduit.
A sheet-shaped magnet adsorbed on the surface of the metal gas conduit and
The adhesive member attached to the suction surface of the sheet magnet and
An ejected gas emergency shutoff device comprising a magnetic force suppressing member that is detachably attached so as to cover the suction surface of the sheet-shaped magnet. The ejected gas emergency shutoff according to claim 1, wherein the magnetic force suppressing member is separated at a central portion of the suction surface so as to be independently peelable. It is a blocking method that temporarily shuts off the gas ejected from the damaged part of the metal gas conduit.
A sheet-shaped magnet that is attracted to the surface of the metal gas conduit, an adhesive member that is attached to the suction surface of the sheet-shaped magnet, and a magnetic force that is detachably attached so as to cover the suction surface of the sheet-shaped magnet. Using a blowout gas emergency shutoff equipped with a deterrent member,
An emergency shutoff method for ejected gas, which comprises peeling the magnetic force suppressing member from an adsorption surface and attracting the sheet-shaped magnet to the surface of the metal gas conduit so as to cover the damaged portion with the adhesive member.

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