CN216116617U

CN216116617U - Trace gas leakage detection device

Info

Publication number: CN216116617U
Application number: CN202122839737.0U
Authority: CN
Inventors: 张洪金; 孙永福; 纪玉朋
Original assignee: Qingdao Jinjiangyuan Industrial Equipment Co ltd
Current assignee: Qingdao Jinjiangyuan Industrial Equipment Co ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-03-22
Anticipated expiration: 2031-11-19

Abstract

The utility model provides a trace gas leakage detection device, which comprises a detection box body, wherein a detection device is fixedly arranged at the upper end of the detection box body, an elastic diaphragm is arranged at the lower end of the detection box body, the elastic diaphragm comprises a first elastic diaphragm, a second elastic diaphragm and a third elastic diaphragm, one side, far away from the first elastic diaphragm, of the third elastic diaphragm is fixedly attached to the inner side of the detection box body, the thickness of the first elastic diaphragm is 0.8mm, the thickness of the second elastic diaphragm is 0.05mm, the thickness of the third elastic diaphragm is 1mm, and the detection device is a laser displacement sensor. The utility model can receive the impact of large airflow and detect weak air leakage, and finally transmits the detection result to the upper computer in an electric signal mode.

Description

Trace gas leakage detection device

Technical Field

The utility model relates to the technical field of gas leakage detection, in particular to a trace gas leakage detection device.

Background

At present, when a valve body is tested, the opening and closing experiment needs to be carried out on some valves for thirty-thousand times, and it is very important to detect whether the valves can be sealed in a turn-off state in the experiment process.

The existing test methods have two types:

1. manually coating soapy water or other liquid for leakage detection, judging whether air leakage occurs or not through bubbles, and having the disadvantages that a detection structure cannot be automatically uploaded to a system, and when a valve is opened, air flow is very large, the liquid for leakage detection can be blown off, so that the liquid needs to be coated again every time the valve is opened;

2. the pressure sensor detects air pressure to judge whether air leakage exists or not, the defect is that air flow is large when the valve is opened, air leakage flow is small or air leakage does not occur when the valve is closed, in order to ensure that the pressure sensor is not damaged, the pressure sensor with the larger size needs to be selected, and the pressure sensor is insensitive to small pressure change detection.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a trace gas leakage detection device, which solves the problems that the traditional gas leakage detection device is provided with a larger pressure sensor, is insensitive to small pressure change detection and cannot be automatically uploaded.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a trace gas leak hunting device, is including detecting the box, it is fixed with detection device to detect the box upper end, it is provided with elastic diaphragm to detect the box lower extreme, elastic diaphragm includes first elastic diaphragm, second elastic diaphragm and third elastic diaphragm, one side that first elastic diaphragm was kept away from to third elastic diaphragm is with the inboard fixed laminating of detection box.

In a preferred embodiment of the present invention, the first elastic membrane is 0.8mm thick, the second elastic membrane is 0.05mm thick, and the third elastic membrane is 1mm thick.

As a preferable aspect of the present invention, the present invention is characterized in that: the detection device is a laser displacement sensor, and the model of the laser displacement sensor is HL-G1.

(III) advantageous effects

Compared with the prior art, the utility model provides a trace gas leakage detection device, which has the following beneficial effects:

this trace gas leak hunting device, thin thick elastic diaphragm and laser displacement detection device all around constitute through the centre, and thickness is 0.05mm in the middle of the diaphragm, just can produce certain elastic deformation under weak atmospheric pressure, can accept the weak gas leakage of detection in the time of big air current impact, finally with the mode of signal of telecommunication with the testing result transmission host computer.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the valve of the present invention when it is opened;

FIG. 3 is a schematic view of the internal structure of the valve of the present invention when the valve is closed and leaking gas;

fig. 4 is a partial structural schematic diagram of the present invention.

In the figure: 1. detecting the box body; 2. a detection device; 3. an elastic diaphragm; 301. a first elastic diaphragm; 302. a second elastic diaphragm; 303. a third elastic diaphragm; 4. the valve body to be tested.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides a trace gas leak hunting device, is including detecting box 1, it is provided with detection device 2 to detect the fixed in box 1 upper end, it is provided with elastic diaphragm 3 to detect the 1 lower extreme of box, the convenient dismantlement installation, elastic diaphragm 3 includes first elastic diaphragm 301, second elastic diaphragm 302 and third elastic diaphragm 303, one side that first elastic diaphragm 301 was kept away from to third elastic diaphragm 303 and the inboard fixed laminating of detection box 1, third elastic diaphragm 303 keeps immovably.

Specifically, the thickness of first elastic diaphragm is 0.8mm, the thickness of second elastic diaphragm is 0.05mm, the thickness of third elastic diaphragm is 1mm, and the middle is thin thick elastic diaphragm all around, and second elastic diaphragm 302 just can produce certain elastic deformation under weak atmospheric pressure.

Specifically, detection device 2 is laser displacement sensor, can take notes second elastic diaphragm 302 whether take place elastic deformation when the valve is closed, finally transmits the testing result for the host computer with the mode of signal of telecommunication.

The working principle and the using process of the utility model are as follows: the whole detection box body 1 is defended on the detected valve body 4, and when the valve is closed and air does not leak, the second elastic membrane 302 is kept unchanged and cannot elastically deform upwards; when the valve is opened, the air pressure of the air flow is high, the first elastic diaphragm 301 is opened to release air, and the second elastic diaphragm 302 is elastically deformed without causing damage; when the valve is closed and leaks gas, the second elastic membrane 302 can deform under the pressure of trace gas, and after the laser displacement sensor detects deformation, the laser displacement sensor judges that the gas leakage transmits a detection result to an upper computer in an electric signal mode, so that the weak gas leakage can be detected while the gas leakage can be received by large airflow impact.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a trace gas leak hunting device, is including detecting box (1), its characterized in that: the detection device (2) is fixedly arranged at the upper end of the detection box body (1), the elastic diaphragm (3) is arranged at the lower end of the detection box body (1), the elastic diaphragm (3) comprises a first elastic diaphragm (301), a second elastic diaphragm (302) and a third elastic diaphragm (303), and one side of the third elastic diaphragm (303) away from the first elastic diaphragm (301) is fixedly attached to the inner side of the detection box body (1).

2. A trace gas leak detection apparatus as defined in claim 1, wherein: the thickness of first elastic diaphragm (301) is 0.8mm, the thickness of second elastic diaphragm (302) is 0.05mm, the thickness of third elastic diaphragm (303) is 1 mm.

3. A trace gas leak detection apparatus as defined in claim 1, wherein: the detection device (2) is a laser displacement sensor.