CN211602335U

CN211602335U - Light pipe for optical gas detector

Info

Publication number: CN211602335U
Application number: CN202020545968.3U
Authority: CN
Inventors: 林永贤; 王昕�; 张�杰; 马启龙
Original assignee: Shanghai Aegis Industrial Safety Corp
Current assignee: Shanghai Aegis Industrial Safety Corp
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-09-29
Anticipated expiration: 2030-04-14

Abstract

The utility model relates to a light pipe for optical gas detector, including the inner chamber, set up in the metal reflection stratum of inner chamber and set up in the supporting layer of metal reflection stratum surface, the light pipe sets up the air vent that several looks interval set up, the air vent runs through supporting layer, metal reflection stratum and be linked together with the inner chamber, the metal reflection stratum is arranged in will coming from the infrared light that the transmitting terminal sent among the optical gas detector receiving terminal among the optical gas detector through reflection conduction to optical gas detector, through the air vent, is located the gaseous inner chamber that gets into of outside leakage of light pipe for infrared light part in the inner chamber is by leaking gaseous absorption, and remaining infrared light is through receiving terminal among the metal reflection stratum reachs optical gas detector. Adopted the utility model discloses a light pipe for optical gas detector can extend the setting along the gas line structure of required protection, sets up the air vent on the light pipe, if there is gas leakage on the gas line, increases and catches the chance, leaks gas more accurately more fast.

Description

Light pipe for optical gas detector

Technical Field

The utility model relates to a gaseous technical field that surveys relates to a light pipe for optical gas detector.

Background

Gas leaks often occur and the cost of a gas leak event is very expensive. Point gas detectors are commonly used in the industry to protect potential gas leakage areas. However, if the wind blows in the opposite direction, the point gas detector will not detect it. To cover larger areas, open path gas detectors are often used. Most open path gas detectors operate as a pair of an optical transmitter and an optical receiver. A pair of open path gas detectors needs to be placed in direct position with an obstruction. Cloudy, foggy, or smog would disable the open path gas detector. Other inconveniences of open path gas detectors are: it can only work in a straight line. And it must not have any obstacle between the transmitter and the receiver. To cover a gas line of 1 km (1000 m), 50 point gas detectors (if one point gas detector is placed every 20 m) need to be installed.

Therefore, there is a need for a light pipe for use with a gas detector for a gas line.

SUMMERY OF THE UTILITY MODEL

The primary object of the present invention is to provide a light pipe for an optical gas detector that can be installed along a gas line, in view of the above problems.

In order to achieve the above object, the present invention adopts the following technical solutions for a light pipe of an optical gas detector:

the light guide pipe comprises an inner cavity, a metal reflecting layer arranged in the inner cavity and a supporting layer arranged on the outer surface of the metal reflecting layer, the light guide pipe is provided with a plurality of vent holes arranged at intervals, the vent holes penetrate through the supporting layer and the metal reflecting layer and are communicated with the inner cavity, the metal reflecting layer is used for conducting infrared rays emitted from an emitting end in an optical gas detector to a receiving end in the optical gas detector through reflection, leaked gas positioned outside the light guide pipe enters the inner cavity through the vent holes, so that part of the infrared rays in the inner cavity is absorbed by the leaked gas, and the rest of the infrared rays reach the receiving end in the optical gas detector through the metal reflecting layer.

Preferably, the light guide is provided with a breathable waterproof film, the breathable waterproof film is arranged on the outer surface of the supporting layer, and the breathable waterproof film is arranged to cover the vent hole so as to prevent external water vapor from entering and allow gas molecules to enter.

Preferably, the light guide pipe is provided with a protective layer, and the protective layer is arranged on the outer surface of the breathable waterproof film.

Preferably, the metal reflective layer is a gold reflective layer, a silver reflective layer or an aluminum reflective layer.

Adopted the utility model discloses a light pipe for optical gas detector can extend the setting along the gas line structure of required protection, sets up the air vent on the light pipe, if there is gas leakage on the gas line, then the light pipe becomes the closest gas and sniffs the component to increase and catch the chance, leak gas more accurately more quickly.

Drawings

Fig. 1 is a schematic axial cross-sectional view of a light pipe for an optical gas detector according to the present invention.

Fig. 2 is a schematic cross-sectional view of a light pipe for an optical gas detector according to the present invention.

Detailed Description

In order to clearly understand the technical contents of the present invention, the following embodiments are specifically illustrated in detail.

Referring to fig. 1-2, in order to provide an embodiment of the light pipe for optical gas detector of the present invention, wherein the light guide comprises an inner cavity 1, a metal reflecting layer 2 arranged in the inner cavity 1, and a supporting layer 3 arranged on the outer surface of the metal reflecting layer 2, the light guide pipe is provided with a plurality of vent holes 6 which are arranged at intervals, the vent holes 6 penetrate through the supporting layer 3 and the metal reflecting layer 2 and are communicated with the inner cavity 1, the metal reflecting layer 2 is used for transmitting infrared light emitted from the transmitting end in the optical gas detector to the receiving end in the optical gas detector through reflection, through said ventilation holes 6, leaking gas outside said light guide enters said cavity 1, so that part of infrared light in the inner cavity 1 is absorbed by leaked gas, and the rest infrared light reaches the receiving end of the optical gas detector through the metal reflecting layer 2.

The metal reflective layer may be a gold reflective layer, a silver reflective layer, an aluminum reflective layer, or the like.

The utility model discloses a light pipe is applicable to optical gas detector, it can reflect the conduction infrared light to set up the air vent, can be so that near gas line exist leak gas get into the inner chamber of light pipe, leak gas get into the inner chamber after, the infrared light can be absorbed by leaking the gas part when the gas of revealing through the inner chamber, consequently arouse the light intensity decay, detect the intensity of surplus infrared ray through the receiving terminal, can obtain the decay degree, according to the decay degree of conduction infrared light, can be used for judging the relevant characteristic of gas leakage.

As shown in fig. 1 to 2, the light guide pipe is provided with a breathable waterproof film 4, the breathable waterproof film 4 is arranged on the outer surface of the support layer 3, and the breathable waterproof film 4 is arranged to cover the vent holes 6 so as to prevent external water vapor from entering and allow gas molecules to enter.

As shown in fig. 1-2, the light guide pipe is provided with a protective layer 5, and the protective layer 5 is arranged on the outer surface of the air-permeable waterproof membrane 4.

In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims

1. A light pipe for an optical gas detector, the light pipe comprising an inner cavity, a metal reflecting layer disposed in the inner cavity, and a supporting layer disposed on an outer surface of the metal reflecting layer, the light guide pipe is provided with a plurality of vent holes which are arranged at intervals, the vent holes penetrate through the supporting layer and the metal reflecting layer and are communicated with the inner cavity, the metal reflecting layer is used for transmitting infrared light emitted from the transmitting end in the optical gas detector to the receiving end in the optical gas detector through reflection, leaking gas outside of said light pipe enters said interior cavity through said vent, so that part of infrared light in the inner cavity is absorbed by leaked gas, and the rest infrared light reaches a receiving end in the optical gas detector through the metal reflecting layer.

2. The light pipe for an optical gas detector as claimed in claim 1, wherein the light pipe is provided with a gas-permeable waterproof film, the gas-permeable waterproof film is provided on an outer surface of the supporting layer, and the gas-permeable waterproof film is provided to cover the vent hole so as to prevent water vapor from entering from the outside and allow gas molecules to enter.

3. The light pipe for an optical gas detector as claimed in claim 2, wherein the light pipe is provided with a protective layer, and the protective layer is disposed on an outer surface of the gas-permeable waterproof film.

4. The optical waveguide for an optical gas sensor of claim 1 wherein the metal reflective layer is a gold reflective layer, a silver reflective layer or an aluminum reflective layer.