JP6893802B2 - Emergency shutoff tool 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.

Cases have been confirmed in which 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).

Japanese Unexamined Patent Publication No. 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 on a large scale, 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. Therefore, 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, the present invention makes it possible to safely and promptly shut off the gas when shutting off the gas ejected from the damaged portion of the metal gas conduit, and to easily perform the restoration work after the shutoff. , Etc. are the issues.

In order to solve such a problem, the present invention has the following configurations.
It is a shut-off tool that emergencyly shuts off the gas ejected from the damaged part of the metal gas conduit, and is permanently held by a work rod having a length capable of remote work and a holding portion provided at the tip of the work rod. The permanent magnet or the holding portion is provided with a magnet, and has an adsorption surface that covers the damaged portion and magnetically attracts to the surface of the metal gas conduit, and an adhesive member that adheres to the damaged portion is attached to the adsorption surface. An emergency blocker for ejected gas, which is characterized by being a magnet.

According to the present invention having such a feature, a permanent magnet is held at the tip of a work rod capable of remote work, and the permanent magnet is attracted to a damaged portion of a metal gas conduit via an adhesive member, so that the permanent magnet can be attracted from the damaged portion. Since the ejected gas is blocked, the gas can be shut off safely and quickly, and since the surrounding soil is not hardened or the gas conduit is not filled with a hardening material, the gas can be shut off quickly and easily. It will be possible to carry out restoration work.

It is explanatory drawing which showed the whole structure of the ejected gas emergency shutoff tool which concerns on embodiment of this invention. It is explanatory drawing which showed the specific example of the ejected gas emergency shutoff device which concerns on embodiment of this invention. It is explanatory drawing which showed the other specific example of the ejected gas emergency shutoff device which concerns on embodiment of this invention. It is explanatory drawing which showed the other specific example of the ejected gas emergency shutoff device which concerns on embodiment of this invention. It is explanatory drawing which showed the other specific example of the ejected gas emergency shutoff device which concerns on embodiment of this invention ((a) shows the state which the adsorption force disappeared, (b) shows the state where the adsorption force was generated. .). It is explanatory drawing which showed the working example using the blocking tool of this invention. It is explanatory drawing which showed the application example of the blocking tool of this invention.

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 FIGS. 1 and 2, the ejected gas emergency shutoff device (hereinafter referred to as a breaker) 1 according to the embodiment of the present invention includes a permanent magnet 2 and a work rod 3 that holds the permanent magnet 2 at its tip. And have. The permanent magnet 2 has a suction surface 2A that covers the damaged portion Ps (see FIG. 2) of the metal gas conduit P, and an adhesive member 4 that is in close contact with the damaged portion Ps is attached to the suction surface 2A. The work rod 3 has a length capable of remote work, and has a holding portion 3A at its tip that holds the permanent magnet 2. The permanent magnet 2 preferably has a high magnetic attraction to the steel material, and for example, a rare earth magnet (neodymium magnet or the like) is preferably used.

In the holding portion 3A, the permanent magnet 2 is held in a state where it is not magnetically attracted to the surface of the metal gas conduit. In the example of FIG. 1, the permanent magnet 2 is held in the frame-shaped holding portion 3A whose lower side is open, the permanent magnet 2 is pulled upward by the tension line 5, and the tension line 5 is the work rod 3. It is connected to the operation bar 6 supported by the hand side end of the magnet. An operation unit 3B provided with the operation bar 6 is provided at the hand side end of the work rod 3, and the holding unit 3A holds the permanent magnet 2 in a state of being pulled upward in the frame, thereby holding a metal gas conduit. The permanent magnet 2 is held at a distance of a set distance or more from the surface of P.

The operation bar 6 provided in the operation unit 3B performs an operation of switching the permanent magnet 2 to a state of being magnetically attracted to the metal gas conduit P. In the example shown in FIG. 2, the operation portion 3B of the work rod 3 is provided with a slit 3P along the longitudinal direction of the work rod 3, and the operation bar 6 rotated by 90 ° around the axis of the work rod 3 is formed into this slit. By dropping it into 3P, the pulling tension of the tension wire 5 connected to the operation bar 6 is removed, and the permanent magnet 2 is attracted to the surface of the metal gas conduit P by magnetic attraction through the adhesive member 4.

When the permanent magnet 2 is attracted to the metal gas conduit P via the adhesive member 4, the adhesive member 4 is crushed by the adsorption force, and a part of the damaged portion Ps of the metal gas conduit P is filled with the damaged portion Ps. The gas is immediately cut off from the damaged portion Ps.

According to such a blocking tool 1, the permanent magnet 2 having a high magnetic attraction force is held by the holding portion 3A provided at the tip of the operating rod 3 in a state where it is not magnetically attracted to the surface of the metal gas conduit P. There is no problem of accidentally attracting the permanent magnet 2 to a location different from the damaged portion Ps, and the attracting surface 2A of the permanent magnet 2 can be moved directly above the damaged portion Ps by accurately aiming at the damaged portion Ps. Then, with the suction surface 2A of the permanent magnet 2 located directly above the damaged portion Ps, the operation bar 6 of the operation unit 3B is operated to loosen the tension of the tension wire 5 that pulls up the permanent magnet 2. Since the permanent magnet 2 is attracted to the surface of the metal gas conduit P, the adhesive member 4 can be reliably brought into close contact with the damaged portion Ps to close the holes and cracks in the damaged portion Ps.

FIG. 3 shows an example of the shape of the suction surface 2A of the permanent magnet 2. In the illustrated example, the suction surface 2A is a curved surface according to the surface shape of the metal gas conduit P. According to this, the suction area of the suction surface 2A can be expanded, and the gas ejection from the damaged portion Ps can be more reliably suppressed. The suction surface 2A of the permanent magnet 2 is not limited to this example, and can be appropriately set according to the shape of the damaged portion Ps.

4 and 5 show another configuration example of the breaker 1. In this example, the holding unit 3A holds the permanent magnet 2 in a state where the suction force of the suction surface 2A is lost, and the operation unit 3B switches so as to generate the lost suction force of the suction surface 2A. In this example, as shown in FIG. 5, the holding portion 3A is composed of a pair of yokes 30 surrounding the permanent magnet 2 and a non-magnetic material 31 interposed between the yokes 30. As a result, as shown in FIG. 5A, when the magnetic poles are arranged so as to face the non-magnetic material 31, the magnetic field lines stop in the yoke 30, and the suction force of the suction surface 2A disappears. Further, as shown in FIG. 5B, when the magnetic poles are arranged so as to face the yoke 30, the magnetic field lines are drawn out of the yoke 30, and the suction force is generated on the suction surface 2A of the holding portion 3A.

In this example, as shown in FIG. 4, the operation unit 3B rotates the operation shaft 33 extending in the work rod 3 to move the permanent magnet 2 from the state of FIG. 5 (a) to FIG. 5 (b). Switch to the state of. In the illustrated example, the rotation of the operation shaft 33 rotates the rotation shaft 2B of the permanent magnet 2 via the worm gear.

Even with the blocking tool 1 in such an example, the permanent magnet 2 is held in a state where the holding portion 3A is not magnetically attracted to the surface of the metal gas conduit P, as in the above-described example. There is no problem of attracting the permanent magnets 2 to different locations, and the attracting surface 2A to which the adhesive member 4 is attached can be moved by accurately aiming at the damaged portion Ps. Then, in that state, by operating the operation unit 3B to generate the magnetic attraction force of the suction surface 2A, the suction surface 2A is attracted to the surface of the metal gas conduit P, and the adhesive member 4 is surely attached to the damaged portion Ps. Can be brought into close contact with each other.

FIG. 6 shows a working example of a blocking method using the blocking tool 1, in which a worker on the ground uses the blocking tool 1 to eject gas ejected from a damaged portion Ps of a metal gas conduit P buried underground. An example of blocking is shown. The worker M holds the operation portion 3B of the work rod 3 from the ground through the formed vertical shaft T, and holds the holding portion 3A provided at the tip of the work rod 3 at the damaged portion Ps of the metal gas conduit P. put on top. Then, as described above, by operating the operation unit 3B, the permanent magnet 2 held by the holding unit 3A is attracted to the surface of the metal gas conduit P. At this time, the work rod 3 has a sufficient length so that remote work from the ground is possible. As a result, the worker M can quickly perform the gas shutoff work on the safe ground without entering the shaft T.

FIG. 7 shows an application example of the blocking tool 1. In this example, the hollow working rod 3 is used as a radiation pipe to dissipate the gas ejected from the damaged portion Ps to the ground. In order to carry out this usage example, a gas flow hole is provided in the permanent magnet 2 and the adhesive member 4, and the gas passing through the gas flow hole is allowed to enter the hollow working rod 3. The work rod 3 that also serves as a discharge pipe can dissipate the ejected gas into the atmosphere by providing a valve V or an extension pipe at the end, and shuts off the ejected gas by operating the valve on the ground. Can be done.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design changes, etc. within the range not deviating from the gist of the present invention, etc. Even if there is, it is included in the present invention. Further, each of the above-described embodiments can be combined by diverting the technologies of each other as long as there is no particular contradiction or problem in the purpose and configuration thereof.

1: Ejected gas emergency shutoff (blocker), 2: Permanent magnet, 2A: Adsorption surface,
3: Work rod, 3A: Holding part, 3B: Operation part,
4: Adhesive member, 5: Tension wire, 6: Operation bar,
P: Metal gas conduit, Ps: Damaged part

Claims (6)

It is a shut-off device that temporarily shuts off the gas ejected from the damaged part of the metal gas conduit.
A work rod having a length capable of remote work and a permanent magnet provided at the tip of the work rod and held by a frame-shaped holding portion having an open lower portion are provided.
The permanent magnet has an adsorption surface that covers the damaged portion and magnetically attracts to the surface of the metal gas conduit, and an adhesive member that adheres to the damaged portion is attached to the adsorption surface.
The holding portion holds the permanent magnet in a state where it is not magnetically attracted to the surface of the metal gas conduit.
An ejected gas emergency shutoff tool characterized in that an operation unit for switching the permanent magnet to a state of being magnetically attracted to the metal gas conduit is provided on the hand side of the work rod. The holding portion holds the permanent magnet at a distance of a set distance or more from the surface of the metal gas conduit.
The operation unit includes an operation bar, and the operation bar and the permanent magnet are connected via a tension wire to switch between a state in which pulling tension is applied to the permanent magnet and a state in which pulling tension is removed. The ejected gas emergency shutoff according to claim 1. It is a shut-off device that temporarily shuts off the gas ejected from the damaged part of the metal gas conduit.
A work rod having a length capable of remote work and a permanent magnet held by a holding portion provided at the tip of the work rod are provided.
The holding portion has an adsorption surface that covers the damaged portion and magnetically attracts to the surface of the metal gas conduit, and an adhesive member that adheres to the damaged portion is attached to the adsorption surface.
The holding portion holds the permanent magnet in a state where the suction force of the suction surface is eliminated.
An operation unit is provided on the hand side of the work rod to rotate a permanent magnet so as to rotate an operation shaft extending in the work rod to generate an attractive force that has disappeared from the suction surface. An emergency shut-off device for ejected gas. The ejected gas emergency shutoff according to any one of claims 1 to 3 , wherein the suction surface is curved according to the surface shape of the metal gas conduit. It is a shutoff method that temporarily shuts off the gas ejected from the damaged part of the metal gas conduit.
Using a breaker equipped with a work rod having a length capable of remote work and a permanent magnet provided at the tip of the work rod and held by a frame-shaped holding portion having an open bottom.
The permanent magnet has an adsorption surface that covers the damaged portion and magnetically attracts to the surface of the metal gas conduit, and an adhesive member that adheres to the damaged portion is attached to the adsorption surface.
The holding portion holds the permanent magnet in a state where it is not magnetically attracted to the surface of the metal gas conduit.
By operating an operation unit that switches the permanent magnet on the hand side of the work rod to a state of magnetically attracting to the metal gas conduit, the suction surface is magnetically attracted to the damaged portion via the adhesive member. An emergency shutoff method for the ejected gas. It is a shutoff method that temporarily shuts off the gas ejected from the damaged part of the metal gas conduit.
Using a breaker equipped with a work rod having a length capable of remote work and a permanent magnet held by a holding portion provided at the tip of the work rod.
The holding portion has an adsorption surface that covers the damaged portion and magnetically attracts to the surface of the metal gas conduit, and an adhesive member that adheres to the damaged portion is attached to the adsorption surface.
The permanent magnet is held in a state where the suction force of the suction surface is eliminated, and the permanent magnet is held.
On the hand side of the work rod, the operation shaft extending in the work rod is rotated to rotate a permanent magnet so as to generate the disappeared suction force of the suction surface, thereby attracting the work rod. An emergency shutoff method for ejected gas, which comprises magnetically adsorbing a surface to the damaged portion via the adhesive member.

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