JPH0543346Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a gas leak prevention device for gas pipe joints, and more specifically to a gas leak prevention device designed to prevent gas leaks during earthquakes. .

[Prior art]

Generally, as shown in FIG. 3, the gas pipe 1 has joints 2, 2, . . . inserted at appropriate locations. Note that 8 in the figure is a gas meter.

By the way, in the case of such a means, in the event of an earthquake, the joints 2, 2, ... especially the gas pipe 1 buried underground
Although the joint 2 is screwed to the gas pipe 1 due to strong earthquake energy, the problem is that the joint 2 may be destroyed or detached due to strong earthquake energy, resulting in gas leakage and secondary disasters. It was hot.

In recent earthquakes, it was found that the gap between gas pipe 1 and joint 2 was as much as 5 cm.

The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a gas leak prevention device that prevents gas leakage from a gas pipe joint.

[Means to solve the problem]

In order to achieve such an object, the present invention provides a mold release material in a joint inserted into a gas pipe so as to cover a part of the gas pipe connected to the joint and both ends of the joint, and further covers the mold release material and covers both ends of the gas pipe. An elastic sealing material is provided so that the inner circumference adheres to the outer circumferential surface of the gas pipe.

[Action]

Even if a gap is created and gas attempts to leak if the joint is displaced from the gas pipe or the joint part is destroyed or broken, the joint is covered at both ends with elastic sealing material bonded to the gas pipe. No gas leaks outside the gas pipe.
When the joint is displaced from the gas pipe, the elastic sealing material expands accordingly. At this time, the release material allows the elastic sealing material to expand.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a gas pipe, 2 is a cylindrical joint inserted at the joint of the gas pipe 1, and both ends thereof are screwed 3 to the joint ends of the gas pipe 1.

The above configuration is the same as before.

A mold release material 4 is provided to cover the joint 2 and a portion of the gas pipes 1, 1 connected to both ends thereof. The material of the release material 4 is not particularly limited as long as it does not adhere to the elastic sealing material described later.

An elastic sealing material 5 is provided so as to cover the mold release material 4 and have its inner circumferential portions at both ends adhered to the outer circumferential surfaces of the gas pipes 1, 1. 7 shows the sealing material adhesion surface.

The elastic sealing material 5 is preferably an elastomer with an elongation rate of 500% or more, such as urethane, silicone, or liquid rubber, and is of a non-sag type that does not flow down.

This elastic sealing material 5 is covered with a protective cover 6 that protects the elastic sealing material 5 from soil.

This protective cover 6 is, for example, a wire mesh, an aluminum case, a plastic case, or the like.

With this configuration, if the joint 2 comes off from the underground gas pipe 1 during an earthquake and shifts from each other, the elastic sealing material 5 whose both ends are bonded to the gas pipes 1, 1 will follow and expand, causing the gas This will completely cover the gap between pipe 1 and joint 2 that was created as a result of the earthquake. Therefore, gas does not leak out of the gas pipe 1.

At this time, since the mold release material 4 is interposed on the inner periphery of the elastic sealing material 5 except for both ends, the elastic sealing material 5 can be expanded as described above.

In this way, gas blow-out is prevented for the time being, safety is ensured in an emergency, and permanent repairs can then be made.

Note that the protective cover 6 is for protecting the elastic sealing material 5, which does not harden during construction, from soil, so it is of course unnecessary if the elastic sealing material 5 can be coated and waited until it hardens.

It goes without saying that the present invention can be similarly applied to a curved tubular joint 2' inserted in a region where the gas pipe 1 is bent at right angles, as shown in FIG.

In the above embodiment, the case where the gas pipe 1 and the joint 2 are misaligned has been explained, but the present invention is applicable to the case where gas tends to leak from the gas pipe 1, for example, when the joint 2 part is destroyed or broken. It is also effective.

〔effect〕

As explained above, in the present invention, a mold release material is provided in a joint inserted into a gas pipe so as to cover a part of the gas pipe connected to the joint and both ends of the joint, and the mold release material is further covered and both ends are covered. Since the elastic sealing material is provided so that the inner circumference adheres to the outer circumferential surface of the gas pipe, it is possible to prevent gas leakage from the joint portion of the gas pipe.

[Brief explanation of the drawing]

Fig. 1 is an explanatory cross-sectional view showing one embodiment of the present invention, Fig. 2 is an explanatory cross-sectional view showing another embodiment of the present invention, and Fig. 3 is an explanatory view showing the piping state of the gas pipe. . 1... Gas pipe, 2, 2'... Fitting, 4... Mold release material, 5... Elastic sealing material, 6... Protective cover, 7
...Sealant adhesive surface.

Claims (1)

[Scope of utility model registration request] In the joint part inserted into the gas pipe, a mold release material is provided so as to cover a part of the gas pipe connected to the joint and both ends of the joint, and the mold release material is further covered and the inner periphery of both ends is formed on the outer peripheral surface of the gas pipe. A gas leak prevention device for a gas pipe joint, characterized in that an elastic sealant is provided to adhere to the gas pipe joint.