JPH0220660Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention covers the outer circumferential surface of a new or existing pipeline with a space of a predetermined width, so that in the event of a pipe breakage, the inside of the pipe is 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 and repairs of pipelines, but this has resulted in the problem that these inspections and repair operations are time-consuming and time-consuming.

The present invention is a gas leak 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 breaks, it can immediately detect the leakage of gas inside the pipe. This is what we provide.

(Means for Solving the Problem) The detection tube of the present invention includes a covering member 1 cut out in the axial direction with a width approximately equal to the outer diameter of the pipe P that covers the pipe wall of the long pipe, and The cover member 1 and the auxiliary member 2 have spacer protrusions 11 and 21 projecting from the inner circumferential surfaces of the pipe P to contact the outer circumferential surface of the pipe P. Further, a step 12 is provided at the edge of the cutout portion of the covering member 1, and a step 22 that fits into the step 12 is provided at the end edge of the auxiliary member 2.

To cover the outer peripheral surface of the pipe P using the detection tube of the present invention, the pipe P is inserted into the notch of the covering member 1, and the outer peripheral surface of the pipe P is partially covered with the covering member 1. Next, after applying an adhesive to the step 12 of the covering member 1, the step 22 of the auxiliary member 2 is fitted into the step 12 and bonded with adhesive.

In this way, the outer peripheral surface of the pipe P is hermetically covered by the detection tube of the present invention, and the spacer projections 11 and 2
1, a space is formed between the pipe P and the detector tube.

Therefore, if this space is filled with nitrogen gas or the like, gas leakage from the pipe P can be immediately detected by measuring the concentration of this gas with a measuring device.

Furthermore, it is even more preferable to mold the detection tube from a transparent or translucent synthetic resin material, since gas leakage from the pipe P can be seen through.

Hereinafter, the specific configuration of the detector tube 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, and Fig. 2 is a front view showing the unfolded state of the covering member and auxiliary member. ,2
is an auxiliary member, and P is a pipe.

The detection tube of the present invention consists of a covering member 1 and an auxiliary member 2, and these members are made of synthetic resin such as vinyl chloride resin and polyethylene resin.

The covering member 1 is made by cutting out the tube wall of a long synthetic resin pipe in the axial direction with a width approximately equal to the outer diameter of the pipe P, and providing a step 12 at the edge of this notch, and a step 12 inside the pipe. A plurality of spacer protrusions 11 are protruded from the circumferential surface at predetermined intervals.

On the other hand, the auxiliary member 2 has the same width as the notch of the covering member 1, and has the step 12 at its edge.
A step 22 is provided which fits into the step 22, and one or more spacer protrusions 21 are provided protruding from the inner circumferential surface of the step 22.

Spacer protrusions 11 and 21 protruding from the inner peripheral surface of the covering member 1 and the auxiliary member 2 create a space of a predetermined width between the pipe P and the detection tube when the outer peripheral surface of the pipe P is covered with these members. This is for the purpose of establishing a section. As an example of the spacer protrusions 11, 21, triangular shapes are illustrated in FIGS. 1 and 2, but the shape of the spacer protrusions is not limited to this, and may be any shape. It may be continuous or discontinuous in the axial direction.

In addition, when the covering member 1 and the auxiliary member 2 are molded from transparent or translucent synthetic resin material,
This is advantageous because it can be seen through the pipe P when the gas inside the pipe leaks.

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

The pipe P is inserted into the notch of the covering member 1, the spacer protrusion 11 is brought into contact with the outer peripheral surface of the pipe P, and the outer peripheral surface of the pipe P is partially covered with the covering member 1.
Next, adhesive is applied to the step 12 of the covering member 1, and the step 22 of the auxiliary member 2 is fitted into the step 12 for adhesive bonding, and the covering member 1 and the auxiliary member 2 are tightened as necessary. Use it to fix it in one piece.

Thus, the outer circumferential surface of the pipe is hermetically covered with the detection tube of the present invention, and a space is provided between the pipe and the detection tube.

(Functions and Effects of the Invention) As detailed above, the detection tube of the present invention includes a covering member cut out in the axial direction with a width approximately equal to the outer diameter of the pipe P that covers the pipe wall of the long pipe, and It consists of an auxiliary member that covers the notch of the member, and a spacer protrusion protrudes from the inner circumferential surface of each member, so a pipe is inserted into the notch of the covering member and the covering member is By simply adhesively bonding the auxiliary member to the notch, the outer circumferential surface of the pipe can be covered airtightly and reliably.

Thus, if the outer circumferential surface of the pipe P is airtightly covered with the detection tube of the present invention, and nitrogen gas or the like is filled in the space between the pipe P and the detection tube, the concentration of this gas can be measured with a measuring device. By measuring this, it is possible to quickly detect gas leaks when pipes are damaged.

Furthermore, if the detector tube is molded from a transparent or translucent synthetic resin material, it is possible to see through the gas leakage when the pipe is damaged.

[Brief explanation of the drawing]

FIG. 1 is a front view of a detector tube showing an embodiment of the present invention, and FIG. 2 is a front view showing the unfolded state of the covering member and the auxiliary member. 1... Covering member, 11... Spacer protrusion, 12
...Step, 2...Auxiliary member, 21...Spacer protrusion, 22...Step, 3...Tightening band, P...
pipe.

Claims (1)

[Claims for Utility Model Registration] 1. A covering member 1 cut out in the axial direction with a width approximately equal to the outer diameter of a pipe P that covers the wall of a long pipe, and covering the notched portion of the covering member 1. A plurality of spacer protrusions 11 and 21 are provided at predetermined intervals on the inner circumferential surfaces of the covering member 1 and the auxiliary member 2, respectively, and the edge of the notch of the covering member 1 is A step 12 is provided at the end of the auxiliary member 2, and a step 22 that fits into the step 12 is provided at the edge of the auxiliary member 2, and the tips of the spacer protrusions 11 and 21 are brought into contact with the outer peripheral surface of the pipe P to separate the covering member 1 and the auxiliary member. A gas leak detection tube characterized in that the pipe P is covered with a member 2, and the step 22 of the auxiliary member 2 is fitted into the step 12 of the covering member 1 and bonded by adhesive. 2. The gas leak detection tube according to claim 1, wherein the covering member 1 and the auxiliary member 2 are made of a transparent or translucent synthetic resin material.