CN115493968A

CN115493968A - Permeation type hydrogen leakage alarm device

Info

Publication number: CN115493968A
Application number: CN202211160106.9A
Authority: CN
Inventors: 李跃娟; 姜晓龙; 齐巍
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2022-12-20

Abstract

The invention discloses a permeation type hydrogen leakage alarm device, which comprises a gas pressure resetting component, a hydrogen sensing device component and an alarm device component, wherein the gas pressure resetting component, the hydrogen sensing device component and the alarm device component are positioned on a shell; the inside cavity structure that is equipped with of casing, the opening part of its one side is equipped with the isolation layer, the isolation layer includes inboard film and the supporting network that covers in the film outside. The permeation type hydrogen leakage alarm device is strong in anti-interference capability and short in recovery time, can overcome the zero drift phenomenon, and meets the requirements of various hydrogen leakage detection occasions with small temperature change.

Description

Permeation type hydrogen leakage alarm device

Technical Field

The invention relates to the technical field of sensors, in particular to a permeation type hydrogen leakage alarm device.

Background

As a clean energy source with great potential in the future, hydrogen can be used for supplying energy to families and industries and can also be used as a fuel of automobiles. However, detection of hydrogen leaks remains a significant challenge. Because the gas to be detected cannot be sampled and the area to be detected is open, there is a flow of air and a strong diffusion of hydrogen. Therefore, detection is usually performed by a hydrogen gas detector at a nearby location.

The hydrogen detector usually comprises a hydrogen alarm controller and a hydrogen sensor, wherein the hydrogen sensor displays a measured value in real time after receiving a signal of a detection probe, and when the measured value reaches a set alarm value, the hydrogen detector controls a hydrogen alarm host to give out sound and light alarm and simultaneously outputs a control signal to prompt an operator to take safety treatment measures in time or automatically start a control device connected in advance so as to ensure safe production.

At present, a plurality of innovations exist in the research of hydrogen sensors, and a plurality of problems are solved, but most hydrogen sensors are still susceptible to interference gas and environment humidity and temperature, and signal drift is obvious, so that accurate detection is influenced.

Disclosure of Invention

The invention aims to provide a permeation type hydrogen leakage alarm device which is simple in structure, strong in anti-electromagnetic interference capability and short in recovery time.

In order to achieve the above object, the present invention provides a permeation type hydrogen leakage alarm device, comprising a gas pressure resetting assembly, a hydrogen sensing assembly and an alarm assembly, which are arranged on a shell; the inside cavity structure that is equipped with of casing, the opening part of its one side is equipped with the isolation layer, the isolation layer includes inboard film and the supporting network that covers in the film outside.

Preferably, the pneumatic resetting component is located at the top of the shell and comprises an air pump and a one-way valve connected with the air pump, and an inverted cone-shaped air inlet corresponding to the one-way valve is formed in the top of the shell.

Preferably, the interface outside of air pump is connected with the check valve through the cutting ferrule, the inboard chamfer department in both ends of cutting ferrule all is equipped with the snap ring, the kneck of air pump is equipped with the first adapter sleeve of being connected with the cutting ferrule, the kneck of check valve is equipped with the second adapter sleeve of being connected with the cutting ferrule.

Preferably, the warning subassembly is including being located pressure sensor on the casing inside wall, pressure sensor corresponds with the center of insulating layer, pressure sensor passes through the relay and links with the buzzer electricity.

Preferably, the housing is of a regular hexahedral structure.

Preferably, the height of the housing is greater than its width.

Preferably, the pressure sensor is located in the middle of the housing.

Therefore, the permeation type hydrogen leakage alarm device is simple in structure, easy to manufacture and controllable in cost; the anti-interference capability is extremely strong; the application environment is wide; the recovery time is short; the air pressure in the cavity can be reset to a certain fixed value by the air pressure resetting assembly, so that the zero drift phenomenon caused by the change of the air pressure in the cavity can be overcome.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic structural view of a permeation type hydrogen leakage alarm device according to the present invention;

fig. 2 is a schematic view of the end of a gas pump in the permeation type hydrogen leakage alarm device of the present invention.

Reference numerals

1. An air pump; 2. a one-way valve; 3. a cavity; 4. a pressure sensor; 5. a ferrule; 6. a relay; 7. a buzzer; 8. a film; 9. a support net; 10. a first connecting sleeve; 11. a second connecting sleeve.

Detailed Description

The technical scheme of the invention is further explained by the attached drawings and the embodiment.

Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and the like herein does not denote any order, quantity, or importance, but rather the terms first, second, and the like are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example one

Fig. 1 is a schematic structural view of a permeation type hydrogen leakage alarm device according to the present invention.

The permeation type hydrogen leakage alarm device comprises a gas pressure resetting assembly, a hydrogen sensing assembly and an alarm assembly which are arranged on a shell. In this embodiment, the height of the housing is greater than its width. The hydrogen sensing component comprises a cavity 3, and the right side wall of the cavity 3 is an isolation layer consisting of a support net 8 and a thin film 9. Among them, the preferable material of the film 9 is a graphene film, which selectively transmits only hydrogen. The cavity 3 is a cavity structure and plays a role in protecting and supporting the whole assembly. The preferred material of cavity 3 is the steel, and cavity 3 is hexahedral structure, operates, integrated etc. more easily in the transportation, can avoid simultaneously in the use collision, fall down. After hydrogen entered cavity 3, this kind of structure had played the guard action, and in addition, cavity 3 inside can form a negative pressure chamber that has certain negative pressure under the effect of atmospheric pressure resetting component.

The atmospheric pressure resets the top that the subassembly is located the casing, including air pump 1 and check valve 2, the interface outside of air pump is passed through the cutting ferrule and is connected with the check valve, the inboard chamfer department in cutting ferrule both ends all is equipped with the snap ring, the kneck of air pump is equipped with the first adapter sleeve of being connected with the cutting ferrule, the kneck of check valve is equipped with the second adapter sleeve of being connected with the cutting ferrule, there is corresponding back taper air inlet between casing top and check valve 2, wherein, the preferred material of check valve 2 is the steel, 2 formula check valves as an organic whole of check valve, and be equipped with rubber seal, guarantee its seal.

The alarm component comprises a pressure sensor 4, a relay 6 and a buzzer 7 which are arranged in the middle of the inner surface of the left side wall. The alarm component can sense the air pressure change in the cavity caused by the hydrogen permeating isolation layer, the change is converted into an electric signal, when the output voltage reaches a threshold value, the relay 6 is switched on, and the buzzer 7 starts to alarm.

During the use, the user at first opens air pump 1, and air pump 1 passes through check valve 2 and extracts vacuum environment, and the back taper air inlet of check valve 2 lower extreme makes extraction efficiency bigger change, and when cavity 3 was inside to reach preset's negative pressure, air pump 1 stop work. Then, put permeation type hydrogen leakage alarm device into monitoring environment, because film 9 only has the permeability to hydrogen, when containing hydrogen in the monitoring environment, can change at the both sides atmospheric pressure of the insulating layer of constituteing by supporting network 8 and film 9, hydrogen in the test environment will permeate through film 9 and get into inside cavity 3, and then arouse that negative pressure can change in the cavity 3, these atmospheric pressure changes are caught by the pressure sensor 4 that is located the casing middle part, pressure sensor 4 converts this kind of change into the signal of telecommunication. When the air pressure in the negative pressure cavity is changed to-0.03 MPA, the relay 6 is switched on, and the buzzer 7 starts to give an alarm.

When the vacuum pump is used again, a user can start working only by opening the air pump 1 to reduce the negative pressure in the cavity 3 to a preset negative pressure value, so that the using effects of short recovery time and no zero drift can be achieved.

Therefore, the permeation type hydrogen leakage alarm device is simple in structure; the anti-interference capability is extremely strong; the application environment is wide; the recovery time is short; the air pressure in the cavity can be reset to a certain fixed value by the air pressure resetting device, so that the phenomenon of zero drift caused by the change of the air pressure in the cavity is overcome.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a permeation type hydrogen leaks alarm device which characterized in that: comprises a gas pressure resetting component, a hydrogen sensing component and an alarm component which are positioned on a shell; the inside cavity structure that is equipped with of casing, the opening part of its one side is equipped with the isolation layer, the isolation layer includes inboard film and the supporting network that covers in the film outside.

2. A permeation type hydrogen gas leakage alarm device according to claim 1, wherein: the pneumatic resetting component is positioned at the top of the shell and comprises an air pump and a one-way valve connected with the air pump, and an inverted cone-shaped air inlet corresponding to the one-way valve is formed in the top of the shell.

3. A permeation type hydrogen gas leakage alarm device according to claim 1, wherein: the connector outside of air pump is connected with the check valve through the cutting ferrule, the inboard chamfer department in both ends of cutting ferrule all is equipped with the snap ring, the kneck of air pump is equipped with the first adapter sleeve of being connected with the cutting ferrule, the kneck of check valve is equipped with the second adapter sleeve of being connected with the cutting ferrule.

4. A permeation type hydrogen gas leakage alarm device according to claim 1, wherein: the alarm assembly comprises a pressure sensor positioned on the inner side wall of the shell, the pressure sensor corresponds to the center of the isolation layer, and the pressure sensor is electrically connected with the buzzer through a relay.

5. A permeation type hydrogen gas leakage alarm device according to claim 1, wherein: the shell is of a regular hexahedral structure.

6. A permeation type hydrogen gas leakage alarm device according to claim 1, wherein: the height of the housing is greater than its width.

7. A permeation type hydrogen gas leakage alarm device according to claim 1, wherein: the pressure sensor is located in the middle of the housing.