JPH0220659Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) The invention covers the outer peripheral surface of a new or existing pipeline with a space of a predetermined width, so that in the event of a pipe breakage, the gas inside the pipe can be removed. This invention relates to a gas leak detection tube that can quickly detect leaks.

(Prior art and its problems) In recent years, various toxic gases have been used in chemical plants, factories that manufacture electronic parts, etc. for various purposes, and the pipelines that transport these toxic gases are usually made of stainless steel pipes. is used.

Although stainless steel pipes have relatively good corrosion resistance against toxic gases, there is always a risk of gas leaks, especially in pipelines that transport high-pressure gases.

However, conventional pipelines have not been provided with any specific means to solve this problem. Conventionally, this problem has been dealt with by carrying out periodic inspections, repairs, etc. of pipelines, but the problem has been that these periodic inspections, repair operations, etc. are time-consuming and time-consuming.

The present invention provides a detection tube that airtightly covers the outer circumferential surface of a pipeline that transports gas with a space of a predetermined width, and in the event that the pipe is damaged, it can immediately detect the leakage of gas inside the pipe. It is something to do.

(Means for solving the problem) The detection tube of the present invention divides a long tube in the radial direction,
A covering member A is provided on the edge of the divided body 1 with a flange 2 projecting toward the outer periphery, and a plurality of spacer protrusions 11, 11, . It consists of side plates 5, 5 erected at opposite ends of a length plate 4, and a hooking member B having a sealant 6 mounted on the bottom surface of the plate 4.

When covering the outer peripheral surface of a pipeline using this detection tube, the spacer protrusion 11 protruding from the inner peripheral surface of the covering member A is brought into contact with the outer peripheral surface of the pipe P, and the outer peripheral surface is covered with a plurality of covering members. The backs of the adjacent flanges 2, 2 are held between the side plates 5, 5 of the hooking member B, and the tips of the flanges 2, 2 are sealed with a sealant 6.

In this way, the outer circumferential surface of the pipeline is hermetically covered by the detection tube of the present invention, but since a space of a predetermined width is provided between the pipe and the detection tube, the space is filled with nitrogen. If a gas or the like is sealed, gas leakage from the pipeline can be immediately detected by measuring the concentration of this gas with a measuring device.

Furthermore, it is even more preferable to mold the covering member A from a transparent or semi-transparent synthetic resin material, since it is possible to see through gas leakage when the pipe is damaged.

Hereinafter, the specific configuration of the present invention will be explained in detail with reference to the drawings.

(Example) Fig. 1 is a front view of a detector tube showing an embodiment of the present invention, Fig. 2 is a front view of a covering member, and Fig. 3 is a front view of a hooking member, and the reference numeral A in the figure is is a covering member, B
is a hook member, and P is a pipe.

The covering member A is made by dividing a synthetic resin pipe such as vinyl chloride resin or polyethylene resin in the radial direction, and providing flanges 2, 2 on the edges of the divided body 1 that protrude toward the outer circumference. A triangular projection 21 is provided on the rear surface of the tip. Furthermore, a plurality of spacer protrusions 11 are protruded from the inner surface of the divided body 1 at predetermined intervals.

The spacer protrusion 11 is for providing a predetermined space between the pipe P and the covering member A when the outer peripheral surface of the pipe P is covered with the covering member A.

As an example of this spacer protrusion 11, the first to second
Although the figure shows an example of a triangular shape, the spacer protrusion 11 is not limited to this shape.
It can have any shape, and may be continuous or discontinuous in the axial direction.

On the other hand, a flange 3 is provided on the outer periphery of the axial end edge of the divided body 1, and a hole 31 for inserting a bolt is provided in the flange 3.

It is convenient if the covering member A is molded from a transparent or translucent synthetic resin, since it is possible to see through the gas leaking from the pipe P.

On the other hand, the hooking member B is made of a synthetic resin material such as vinyl chloride resin or a metal material, and has a structure in which side plates 5, 5 are erected on opposite edges of a long plate body 4.

The distance between the side plates 5, 5 is equal to 2 of the thickness of the tsuba 2 mentioned above.
It has a triangular protrusion 51 on the inner surface of its tip. In addition, side plates 5, 5
There is a rubber packing on the bottom of the plate 4 surrounded by
Alternatively, a sealant 6 such as silicone resin or butyl rubber is attached.

Next, a procedure for covering the outer peripheral surface of the pipe P using this detection tube will be explained.

First, the outer peripheral surface of the pipe P is covered with a plurality of covering members A, A..., and the side plates 5, 5 of the hooking member B are straddled over the adjacent flanges 2, 2 of the covering members A, A... and push it in.

At this time, a protrusion 51 is provided on the side plate 5 of the hooking member B, and a protrusion 21 is provided on the back of the tip of the collar 2.
protrudes, the side plates 5, 5 elastically expand and the protrusion 51 climbs over the protrusion 21, causing the protrusion 51,
51 is elastically crimped to the back surface of the collars 2, 2.

Further, by this fitting operation, the tips of the flanges 2, 2 are elastically pressed against the sealing agent 6 installed in the hooking member B, and the connecting portion of the covering member A is airtightly sealed.

After covering the outer circumferential surface of the pipe P with the detector tube in this way, the flanges 3, 3 protruding from the edge of the covering member A are joined with bolts and nuts, and the detector tube is sequentially attached in the axial direction. By making the connections, the pipe coating operation is completed.

(Operations and Effects of the Invention) As detailed above, the detection tube of the present invention includes a covering member in which a long tube is divided in the radial direction, and a collar protruding toward the outer circumference is provided on the end edge of the divided body; It consists of a hooking member that can hold each collar of the covering member and seal it with a sealant, so just by covering the outer periphery of the pipe with a plurality of covering members and sandwiching the adjacent collars with the hooking members, it is possible to The outer peripheral surface of the pipe can be coated easily and reliably.

After coating the outer circumferential surface of the pipeline in this way, the space between the pipe and the detection tube is filled with nitrogen gas, etc., and the concentration of this gas is measured with a measuring device. can quickly detect gas leaks in pipes.

Further, when the covering member is molded from a transparent or semi-transparent synthetic resin material, it is possible to see through the pipe fluid when it leaks from the pipe.

[Brief explanation of the drawing]

FIG. 1 is a front view of a detector tube showing an embodiment of the present invention, FIG. 2 is a front view of a covering member, and FIG. 3 is a front view of a hooking member. A... Covering member, B... Hooking member, P... Pipe, 1... Divided body, 11... Spacer protrusion, 2...
...Brim, 21...Protrusion, 3...Flange, 4...Plate, 5...Side plate, 51...Protrusion, 6...Sealing agent.

Claims (1)

[Claims for Utility Model Registration] 1. A long tube is divided in the radial direction, and a collar 2 is provided on the edge of the divided body 1 that protrudes toward the outer circumference, and a predetermined interval is provided on the inner surface of the divided body 1. A covering member A having a plurality of spacer protrusions 11, 11... projecting thereon.
and side plates 5, 5 at opposite ends of the long plate body 4.
It consists of a hooking member B which is erected and a sealing agent 6 is attached to the bottom surface of the plate 4, and a spacer protrusion 11 protruding from the inner surface of the covering member A is brought into contact with the outer circumferential surface of the pipe P. The outer circumferential surface is covered with a plurality of covering members A, the back surfaces of the adjacent flanges 2, 2 are sandwiched between the side plates 5, 5 of the hooking member B, and the tips of the flanges 2, 2 are sealed with a sealant 6. A gas leak detection tube featuring: 2. The gas leak detection tube according to claim 1, wherein the covering member A is made of a transparent or translucent synthetic resin material.