Hydrogen fuel cell hydrogen leakage detection hydrogen sensor

Abstract

The hydrogen fuel cell hydrogen leakage detection hydrogen sensor comprises a bottom plate, a shell cover and a detection part, the bottom plate and the shell cover are both square, a space groove is formed in the side, facing the bottom plate, of the shell cover, threaded columns are fixed to the positions, close to the four corners of the space groove, of the bottom of the space groove, and the detection part is fixed to the bottom of the space groove. Through holes are formed in the positions, close to the four corners, of the bottom plate, injection molding copper nuts are further fixed to the positions, close to the middle of the groove bottom of the space groove, of the bottom of the space groove, and a square sealing ring is further embedded in the groove bottom of the space groove and accommodates a detection component. According to the hydrogen sensor for hydrogen leakage detection of the hydrogen fuel cell, the bottom plate and the shell cover as well as the detection part and the shell cover are fixed through the bolts, so that the disassembly and assembly of each part of the sensor can be effectively facilitated, and the maintenance of the hydrogen sensor is further facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hydrogen sensor structure more specifically relates to a hydrogen fuel cell hydrogen leakage detection hydrogen sensor. BACKGROUND

[0002] Hydrogen is flammable and explosive gas, for hydrogen fuel cell car, need real -time to the concentration of hydrogen is detected to guarantee the safe operation of the car. Hydrogen sensor is the main device of detecting hydrogen, it can real -time monitoring hydrogen concentration of hydrogen fuel cell car and when hydrogen is in larger concentration timely send out the alarm and make the whole car's system make corresponding measures to prevent the occurrence of safety accidents. But in the prior art, hydrogen sensor is easy to be interfered by water vapor, smoke and dust in the air and solid liquid, therefore can produce influence to the sensitivity of hydrogen sensor, in addition, when the substance exists in hydrogen sensor for a long time, these substances are easy to produce physical or chemical reaction with the probe of hydrogen sensor, therefore can further produce interference to the use performance of hydrogen sensor.

[0003] Therefore, the hydrogen sensor structure in the prior art has the problems of being difficult to maintain, causing damage to the shell during disassembly, and having a single signal output format and no fireproof function. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a hydrogen fuel cell hydrogen leakage detection hydrogen sensor which is easier to maintain when damaged.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of hydrogen fuel cell hydrogen leakage detection hydrogen gas sensor, including bottom plate, shell cover and detection component, the shell cover is connected on bottom plate, the detection component is installed between bottom plate and shell cover, the bottom plate and shell cover are square, characterized by: the side of shell cover towards bottom plate is equipped with space groove, the groove bottom of space groove is fixed with threaded column near the position of its four corners, the bottom plate is equipped with through hole near the position of its four corners, pass through threaded connection of through hole and threaded column with bolt, to fix bottom plate to shell cover, the position near the middle of the groove bottom of space groove is also fixed with injection molding copper nut, pass through threaded connection of detection component and injection molding copper nut with bolt, to fix detection component in space groove, the groove bottom of space groove is also embedded with square sealing ring, the square sealing ring is contained in detection component, to form a sealing space containing detection component with bottom plate when bottom plate is installed on shell cover.

[0006] As a further improvement of the utility model, the detection component includes PCB board, sensor element and output pin, the four corners of PCB board are equipped with through hole for bolt, the sensor element is fixed on the center position of PCB board, the output pin is welded on the position near side of PCB board, the center of shell cover is formed into ventilation cylinder by protruding away from detection component, the sensor element is inserted into ventilation cylinder, the end of ventilation cylinder is equipped with a plurality of air holes, waterproof air permeable film is fixed between air hole and sensor element.

[0007] As a further improvement of the utility model, the center of shell cover is embedded with sealing ring, the sealing ring is coaxially arranged with ventilation cylinder, when PCB board is installed on shell cover, PCB board is abutted with sealing ring, to separate the internal space of ventilation cylinder and the internal space of shell cover.

[0008] As a further improvement of the utility model, the side of shell cover is fixed with plug-in interface, the output pin is bent and inserted into plug-in interface after passing through shell cover.

[0009] As a further improvement of the utility model, the side of bottom plate towards shell cover is fixed with a plurality of partition strips, a plurality of partition strips are staggered, a plurality of recesses are formed on the side of bottom plate.

[0010] The utility model has the advantages that, through the arrangement of four threaded columns in space groove, the detachable connection between bottom plate and shell cover can be realized, when disassembling, only need to unscrew bolt, detection component can be exposed to facilitate maintenance, and through the way of embedding square sealing ring in space groove, detection component has sealing space, so that external moisture and other substances affecting the operation of component can be prevented from entering through the joint between bottom plate and shell cover and affecting the operation of detection component. Attached Figure Description

[0011] Figure 1 This is an overall structural diagram of the hydrogen leak detection hydrogen sensor for hydrogen fuel cells of this utility model.

[0012] Figure 2 This is a schematic diagram of the internal structure of the hydrogen leak detection hydrogen sensor for hydrogen fuel cells of this utility model.

[0013] Figure 3 for Figure 2 Schematic diagram of the middle shell cover;

[0014] Figure 4 for Figure 2 Schematic diagram of the midsole plate;

[0015] Figure 5 for Figure 2 A schematic diagram of the structure of the detection component. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0017] Reference Figures 1 to 5 As shown in this embodiment, a hydrogen leak detection hydrogen sensor for a hydrogen fuel cell includes a base plate 1, a housing 2, and a detection component 3. The housing 2 is fitted onto the base plate 1, and the detection component 3 is installed between the base plate 1 and the housing 2. Both the base plate 1 and the housing 2 are square. A spatial groove 4 is formed on the side of the housing 2 facing the base plate 1. Threaded posts 21 are fixed at the four corners of the bottom of the spatial groove 4. Through holes are formed at the four corners of the base plate 1, and bolts are passed through the through holes to... The threaded post 21 is threaded to fix the base plate 1 to the shell cover 2. A molded copper nut 5 is also fixed near the center of the bottom of the space groove 4. A bolt passes through the detection component 3 and is threadedly connected to the molded copper nut 5 to fix the detection component 3 into the space groove 4. A square sealing ring 6 is also embedded in the bottom of the space groove 4. This square sealing ring 6 accommodates the detection component 3, so that when the base plate 1 is installed on the shell cover 2, it cooperates with the base plate 1 to form a sealed space to accommodate the detection component 3. Specifically, as shown... Figure 1As shown in the figure, in the embodiment, a square sealing space for accommodating the detection component 3 is enclosed in the space groove 4 by the square sealing ring, then the detachable connection between the bottom plate 1 and the shell cover 2 is realized by the bolt and the threaded column 21, and on the other hand, the detachable connection of the detection component 3 is realized by the combination of the detection component 3 and the injection molded copper nut 5, so compared with the prior art, the maintenance is simpler when damaged, and the bottom plate 1 and the shell cover 2 in the embodiment are made of fireproof material, the fireproof material used is PA66 nylon material, and a halogen-free flame retardant is added, so that the fireproof effect can reach V0 level, so that the bottom plate 1 and the shell cover 2 have considerable fireproof performance.

[0018] In order to make the sensor of the application more practical and reliable, the detection component 3 is composed of the PCB board 31, the sensor element 32 and the output pin 33 in the embodiment, the sensor element 32 in the embodiment is a catalytic combustion type gas sensor, which is directly welded on the PCB board 31, and forms a complete module with the PCB board 31, and the circuit design of the PCB board 31 meets the requirements of intrinsic safety and explosion protection, so as to achieve the effect of explosion protection, the detection column provides a mounting space for the sensor element 32, and the inner space of the detection column is separated from the space where the PCB board 31 is located by the sealing ring 23, so as to further avoid the influence of external substances on the work of the PCB board 31.

[0019] Further, the waist-shaped plug interface 22 is arranged on the side of the shell cover 2, which can protect the output pin 33 and position the external plug, so as to ensure stable data transmission.

[0020] Further, since the PCB board 31 generates heat during operation, although the heat is not much, if there is no heat dissipation space, the PCB board 31 may be burned due to high temperature at some place, therefore, the bottom plate 1 is provided with a plurality of partition strips 11 on the side, and a plurality of grooves are formed on the bottom plate, so that the partition strips 11 can act as reinforcing ribs to reduce the deformation of the bottom plate 1 during use and the extrusion of the PCB board 31.

[0021] In summary, the hydrogen fuel cell hydrogen leakage detection hydrogen sensor of the embodiment can realize the simple disassembly of the detection component 3 and the bottom plate 1 by arranging the threaded column 21 and the injection molded copper nut 5 on the shell cover 2, so compared with the prior art, the internal damage is easy to repair, and the disassembly will not damage the shell.

[0022] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above examples, and belongs to the technical scheme under the idea of the present application all belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A hydrogen sensor for detecting hydrogen leakage from a hydrogen fuel cell, comprising a base plate (1), a cover (2) and a detection component (3), the cover (2) being attached to the base plate (1), the detection component (3) being mounted between the base plate (1) and the cover (2), the base plate (1) and the cover (2) each being square in shape, characterised in that: The side of the shell cover (2) towards the bottom plate (1) is provided with a space groove (4), the groove bottom of the space groove (4) is fixed with a threaded column (21) near the position of the four corners, the bottom plate (1) is provided with a through hole near the position of the four corners, the threaded column (21) is screwed with the through hole by a bolt to fix the bottom plate (1) to the shell cover (2), the space groove (4) is further fixed with an injection molded copper nut (5) near the middle of the groove bottom, the injection molded copper nut (5) is screwed with the detection component (3) by a bolt to fix the detection component (3) in the space groove (4), the groove bottom of the space groove (4) is further embedded with a square sealing ring (6), the square sealing ring (6) contains the detection component (3) to form a sealed space containing the detection component (3) with the bottom plate (1) when the bottom plate (1) is installed on the shell cover (2). ​ 2. The hydrogen fuel cell hydrogen leak detection hydrogen sensor of claim 1, wherein: The detection component (3) comprises a PCB board (31), a sensor element (32) and an output pin (33), the four corners of the PCB board (31) are provided with through holes for bolts, the sensor element (32) is fixed on the center of the PCB board (31), the output pin (33) is welded on the position near the side edge of the PCB board, the center of the shell cover (2) is protruded to form a ventilation cylinder away from the detection component (3), the sensor element (32) is inserted into the ventilation cylinder, the end of the ventilation cylinder is provided with a plurality of air holes, the air holes are fixed with a waterproof air permeable film between the sensor element (32).

3. The hydrogen fuel cell hydrogen leak detection hydrogen sensor of claim 2, wherein: The center of the shell cover (2) is embedded with a sealing ring (23), the sealing ring (23) is coaxially arranged with the ventilation cylinder, when the PCB board (31) is installed on the shell cover (2), the PCB board (31) abuts against the sealing ring (23) to separate the internal space of the ventilation cylinder and the internal space of the shell cover (2).

4. The hydrogen fuel cell hydrogen leak detection hydrogen sensor of claim 3, wherein: The side of the shell cover (2) is fixed with a plug interface (22), the output pin (33) is bent to pass through the shell cover (2) and extends into the plug interface (22).

5. The hydrogen fuel cell hydrogen leak detection hydrogen sensor of claim 4, wherein: The side of the bottom plate (1) towards the shell cover (2) is fixed with a plurality of separation strips (11), the plurality of separation strips (11) are staggered to form a plurality of grooves on the side of the bottom plate (1).

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