CN216899484U

CN216899484U - Hydrogen fuel cell stack leak detection device

Info

Publication number: CN216899484U
Application number: CN202121920560.0U
Authority: CN
Inventors: 杨伟龙; 周宇; 姜允宝; 杨坤; 黄宗平
Original assignee: Anhui Gadro Industrial Technology Co ltd
Current assignee: Anhui Gadro Industrial Technology Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-07-05
Anticipated expiration: 2031-08-17

Abstract

The utility model discloses a hydrogen fuel cell stack leak detection device, which comprises a shell, a miniature air vibration sensor and an air vibration analyzer, wherein the shell is in a cubic shape, a sensor wiring groove is arranged in the shell, through holes are uniformly formed in one surface of the sensor wiring groove, which is positioned on the inner side of the shell, the miniature air vibration sensor is arranged on each reserved hole, the miniature air vibration sensor wiring on each surface is connected to a connector through the outer side surface of the through sensor wiring groove, the connector is connected with the air vibration analyzer, and the miniature air vibration sensor is arranged in the leak detection device, so that the vibration of gas at the leak part of the hydrogen fuel cell stack is accurately detected, the cost of using helium, high-purity nitrogen and color-developing copper oxide is saved, and the device has high detection efficiency, high repeated utilization rate and high economic benefit.

Description

Hydrogen fuel cell stack leak detection device

Technical Field

The utility model relates to the technical field of leak detection devices, in particular to a leak detection device for a hydrogen fuel cell stack.

Background

A hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electrical energy. The basic principle is the reverse reaction of electrolyzed water, hydrogen and oxygen are supplied to the anode and cathode respectively, and after the hydrogen diffuses out through the anode and reacts with the electrolyte, electrons are released to reach the cathode through an external load. Dry batteries and storage batteries are energy storage devices, store electric energy and release the electric energy when needed; a hydrogen fuel cell is strictly a power generation device, and like a power plant, is an electrochemical power generation device that directly converts chemical energy into electrical energy. In addition, the electrode of the hydrogen fuel cell is made of a special porous material, which is a key technology of the hydrogen fuel cell, and not only needs to provide a large contact surface for gas and electrolyte, but also has a catalytic effect on the chemical reaction of the cell, because hydrogen belongs to flammable and explosive gas, and leakage detection is often required to be performed on the hydrogen fuel cell stack periodically in order to prevent explosion caused by leakage in the using process.

Since the gas leakage of the hydrogen fuel cell stack is necessarily accompanied by the air vibration at the leakage position, the leakage position can be accurately determined only by monitoring the vibration.

The leakage detection device for the hydrogen fuel cell stack on the market at present generally has the following problems: 1. helium or high-purity nitrogen is mostly used as tracer gas for improving the detection precision, so that the detection cost is high; 2. utility model CN211477521U a fuel cell pile gas tightness detection device uses copper oxide to take place redox reaction as the hydrogen that the color development coating and follow the hydrogen fuel cell pile seepage come out, uses chemical reagent to increase the detection cost, and but reuse, and the reaction needs the heating just can go on, and hydrogen is originally just flammable explosive gas heating has increased the danger that detects.

SUMMERY OF THE UTILITY MODEL

In view of the above problems in the prior art, an object of the present invention is to provide a leak detection apparatus for a hydrogen fuel cell stack, in which a micro air vibration sensor is installed in the leak detection apparatus, so as to accurately detect the vibration of the gas at the leak location of the hydrogen fuel cell stack, and save the costs of using helium, high-purity nitrogen and color-developed copper oxide, and the apparatus has high detection efficiency, high recycling rate and high economic benefits.

In order to realize the purpose, the utility model adopts the technical scheme that:

the utility model provides a hydrogen fuel cell pile leak hunting device, includes casing, miniature air vibration sensor and air vibration analysis appearance, the casing is cube form and inside sensor wiring groove that is equipped with, sensor wiring groove is in evenly be equipped with in the inboard one side of casing and run through the preformed hole, install miniature air vibration sensor on the preformed hole, on each face miniature air vibration sensor wiring is through running through sensor wiring groove lateral surface is connected on the connector, the connector is connected with air vibration analysis appearance.

Furthermore, a supporting circular truncated cone is arranged at the bottom of the inner side of the shell.

Furthermore, a fixed angle plate is installed on one side of the top of the shell, and a fixed rotating shaft is installed on the fixed angle plate.

Furthermore, a cover plate is fixedly connected to the fixed rotating shaft.

Furthermore, supporting legs are symmetrically arranged at the bottom of the shell.

Furthermore, the connector is connected with a wire tube access port on one side of the air vibration analyzer through a wire tube arranged outside.

Compared with the prior art, the utility model has the following advantages:

(1) according to the utility model, since the gas leakage of the hydrogen fuel cell stack is accompanied by the air vibration of the leakage position, the leakage position can be accurately judged only by monitoring the vibration, the miniature air vibration sensors are uniformly arranged on 6 surfaces in the leakage detection device, the hydrogen fuel cell stack is filled with pressure gas (the higher the pressure is, the better the detection efficiency is on the premise of safety) and is placed in the leakage detection device, when the gas leakage occurs, the air vibration occurs at the leakage position, the miniature air vibration sensors transmit vibration signals to the air vibration analyzer for analysis and positioning, the position of the corresponding hydrogen fuel cell stack can be directly displayed, the detection omits the use of helium or high-purity nitrogen as tracer gas, the detection cost is greatly reduced, and the detection efficiency is high.

(2) According to the utility model, the detection work can be completed by injecting the pressurized air into the hydrogen fuel cell stack, no chemical agent is used, and no hydrogen is used as a tracer gas, so that the detection safety is greatly improved.

Drawings

FIG. 1 is a first perspective view provided by an embodiment of the present invention;

FIG. 2 is a second perspective view provided in accordance with an embodiment of the present invention;

FIG. 3 is an open perspective view of a cover provided by an embodiment of the present invention;

fig. 4 is a perspective view of the cover plate according to the embodiment of the present invention with the cover plate removed.

In the figure: 1. a housing; 2. reserving a hole; 3. a micro air vibration sensor; 4. a sensor wiring slot; 5. A connector; 501. a conduit; 6. fixing the angle plate; 601. fixing the rotating shaft; 7. a cover plate; 8. a supporting circular table; 9. supporting legs; 10. an air vibration analyzer; 1001. a conduit access port.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1-4, a leak detection device for a hydrogen fuel cell stack comprises a shell 1, a miniature air vibration sensor 3 and an air vibration analyzer 10, wherein the shell 1 is in a cube shape and is internally provided with a sensor wiring groove 4, the sensor wiring groove 4 is uniformly provided with a through preformed hole 2 on one side of the inner side of the shell 1, the miniature air vibration sensor 3 is arranged on the preformed hole 2, the wiring of the miniature air vibration sensor 3 on each side is connected to a connector 5 through the outer side surface of the through sensor wiring groove 4, and the connector 5 is connected with the air vibration analyzer 10.

Through evenly installing miniature air vibration sensor 3 on six inside faces of leak hunting device, it puts into leak hunting device to fill hydrogen fuel cell stack into the pressure gas (the pressure is big more detection efficiency is better under the prerequisite of safety), when the gas leakage takes place, air vibrations take place in the leakage department, miniature air vibration sensor 3 passes to air vibration analysis appearance 10 with vibration signal and carries out the analysis location, can direct indication correspond which position of hydrogen fuel cell stack and take place to leak, this kind of detection omits to use helium or high-purity nitrogen gas as tracer gas, greatly reduced the detection cost, and the calibration efficiency is high.

As shown in fig. 4, a supporting circular truncated cone 8 is arranged at the bottom of the inner side of the casing 1, and the supporting circular truncated cone 8 provides a position for placing the hydrogen fuel cell stack and can avoid detection shielding.

As shown in fig. 4, a fixed angle plate 6 is installed at one side of the top of the housing 1, a fixed rotating shaft 601 is installed on the fixed angle plate 6, and one end of a cover plate 7 is installed on the fixed rotating shaft 601 to facilitate opening and closing of the device door.

As shown in fig. 1 to 3, a cover plate 7 is fixedly connected to the fixed rotating shaft 601, and the cover plate 7 is closed after the hydrogen fuel cell stack is placed, so as to prevent the external environment from affecting the detection result.

As shown in fig. 1-4, the bottom of the housing 1 is symmetrically provided with supporting legs, which serve as a stabilizing device.

As shown in fig. 1 to 4, the connector 5 is connected to a conduit inlet 1001 on one side of the air vibration analyzer 10 through an externally provided conduit 501, and the conduits 501 are provided on the outside of the connector 5 on six outer sides of the housing 1 and are connected to the air vibration analyzer 10 through the conduit inlet 1001.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A hydrogen fuel cell stack leak detection device includes a case (1), a micro air vibration sensor (3), and an air vibration analyzer (10), and is characterized in that: casing (1) is cube form and inside and is equipped with sensor wiring groove (4), sensor wiring groove (4) are in evenly be equipped with on casing (1) inboard one side and run through preformed hole (2), install miniature air vibration sensor (3) on preformed hole (2), on each face miniature air vibration sensor (3) wiring is through running through sensor wiring groove (4) lateral surface is connected on connector (5), connector (5) are connected with air vibration analysis appearance (10).

2. A hydrogen fuel cell stack leak detection device according to claim 1, characterized in that a support boss (8) is provided at the bottom of the inside of the casing (1).

3. A leak detection device for a hydrogen fuel cell stack according to claim 1, characterized in that a fixed angle plate (6) is installed on one side of the top of the housing (1), and a fixed rotating shaft (601) is installed on the fixed angle plate (6).

4. A leak detection apparatus for a hydrogen fuel cell stack in accordance with claim 3, wherein a cover plate (7) is fixedly attached to said fixed rotary shaft (601).

5. A leak detection device for a hydrogen fuel cell stack in accordance with claim 1, wherein the bottom of said casing (1) is symmetrically provided with support legs (9).

6. A hydrogen fuel cell stack leak detection apparatus according to claim 1, wherein said connector (5) is connected to a conduit inlet (1001) on the side of said air vibration analyzer (10) through an externally provided conduit (501).