Waterproof ventilation valve detection device

Abstract

The utility model provides a waterproof ventilation valve detection device, which comprises a box body provided with a gas cavity, the side wall of the box body is provided with a first exhaust port and a gas inlet, the first exhaust port and the gas inlet are communicated with the gas cavity, the first exhaust port is used for installing a waterproof ventilation valve, and the gas inlet is used for introducing gas into the gas cavity; the exhaust part covers the first exhaust port, a second exhaust port is formed in the exhaust part, and the second exhaust port is used for exhausting gas passing through the waterproof ventilation valve; the concentration detection parts and the pressure detection parts are arranged on the box body, the pressure detection parts are used for detecting the pressure in the gas cavity, the concentration detection parts are used for detecting the gas concentration in the gas cavity, the concentration detection parts are multiple in number, and the installation positions of the concentration detection parts are distributed at intervals in the height direction. According to the technical scheme, the problem of inaccurate detection data of a waterproof ventilation valve detection device in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and in particular to a waterproof and breathable valve detection device. Background Art

[0002] At present, on a fuel cell, a waterproof and breathable valve is usually installed. The main functions of the waterproof and breathable valve are waterproofing and air permeability, and balancing the pressure difference. When installed on the fuel cell, it can timely discharge the hydrogen in the shell to prevent hydrogen from accumulating inside the battery and causing potential safety hazards.

[0003] In the prior art, in order to obtain the optimal number of waterproof and breathable valves to be arranged in a fuel cell stack, it is necessary to detect the concentration diffusion rate of the waterproof and breathable valve, which is generally detected by a waterproof and breathable valve detection device. The existing detection device usually includes a box body with a gas chamber. The waterproof and breathable valve is installed on the box body, and a pressure detection member and a concentration detection member are also arranged on the box body. By introducing an inert gas into the gas chamber and reading the change values of the gas pressure and concentration in the gas chamber, the concentration diffusion rate of the waterproof and breathable valve can be obtained. However, in the existing detection device, due to the different density of the inert gas from that of air, the distribution of the inert gas in the gas chamber may be uneven, resulting in a deviation between the reading of the concentration detection member and the actual value, leading to inaccurate detection data and affecting the detection effect of the waterproof and breathable valve. Summary of the Utility Model

[0004] The utility model provides a waterproof and breathable valve detection device to solve the problem of inaccurate detection data of the waterproof and breathable valve detection device in the prior art.

[0005] The utility model provides a waterproof and breathable valve detection device, which includes: a box body with a gas chamber. A first exhaust port and an air inlet are arranged on the side wall of the box body. Both the first exhaust port and the air inlet are communicated with the gas chamber. The first exhaust port is used for installing the waterproof and breathable valve, and the air inlet is used for introducing gas into the gas chamber; an exhaust member covering the first exhaust port, and a second exhaust port is arranged on the exhaust member for discharging the gas passing through the waterproof and breathable valve; a concentration detection member and a pressure detection member, both of which are arranged on the box body. The pressure detection member is used for detecting the pressure in the gas chamber, and the concentration detection member is used for detecting the gas concentration in the gas chamber. A plurality of concentration detection members are provided, and the installation positions of the plurality of concentration detection members are spaced apart in the height direction.

[0006] Further, the box body has a top cover and a main body connected to each other. The main body has an opening, and the top cover covers the opening and forms the gas chamber together with the main body. First connection ports are arranged on both the top cover and the main body for installing the concentration detection member.

[0007] Further, a plurality of first exhaust ports are provided, and the plurality of first exhaust ports are all used for installing waterproof breathable valves.

[0008] Further, a plurality of exhaust members are provided, and the plurality of exhaust members are arranged in one-to-one correspondence with the plurality of first exhaust ports.

[0009] Further, the diameters of the plurality of first exhaust ports are different to install waterproof breathable valves of different sizes.

[0010] Further, the exhaust member has a connecting portion and a covering portion. The connecting portion is used for fixedly connecting with the box body. The covering portion covers the first exhaust port. The covering portion has a receiving cavity for receiving the waterproof breathable valve. A second exhaust port is provided on the side wall of the receiving cavity.

[0011] Further, the connecting portion and the box body are in sealing fit.

[0012] Further, a sealing groove is provided on the box body. The sealing groove surrounds the outer periphery of the first exhaust port, and a sealing ring is provided in the sealing groove.

[0013] Further, a third exhaust port is further provided on the box body, and the third exhaust port is used for exhausting the gas in the gas cavity.

[0014] Further, gas pipelines are connected to the intake port, the second exhaust port and the third exhaust port, and flow control valves are provided on the gas pipelines.

[0015] By applying the technical solution of the present utility model, gas can be introduced into the gas cavity through the intake port. The gas in the gas cavity can lead to the exhaust member through the waterproof breathable valve provided at the first exhaust port and be exhausted through the second exhaust port. During the flow process of the gas from the gas cavity to the outside through the waterproof breathable valve, the pressure and gas concentration in the concentration cavity can be detected by the pressure detection member and the concentration detection member provided on the housing, so as to measure the concentration diffusion rate of the waterproof breathable valve, provide a reference for setting the number of waterproof breathable valves of the fuel cell, and improve the safety performance of the fuel cell during use. During the working process of the concentration detection member, by setting a plurality of concentration detection members and arranging the plurality of concentration detection members at intervals in the height direction, the gas concentration at different heights in the gas cavity can be detected in the height direction. When calculating, the average value of the readings of the plurality of concentration detection members can be taken to overcome the uneven distribution of gas caused by gas density in the gas cavity, improve the accuracy of the gas detection data in the gas cavity, and ensure the detection effect of the waterproof breathable valve detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 shows a schematic structural diagram of the waterproof and breathable valve detection device provided by the present utility model;

[0018] Figure 2 shows a front view of one perspective of the waterproof and breathable valve detection device provided by the present utility model.

[0019] Among them, the above-mentioned drawings include the following reference numerals:

[0020] 100, box body;

[0021] 101, first exhaust port; 102, air inlet; 103, first connection port; 104, third exhaust port; 105, second connection port;

[0022] 110, top cover; 120, main body; 130, sealing groove; 140, sealing ring;

[0023] 200, waterproof and breathable valve;

[0024] 300, exhaust member;

[0025] 301, second exhaust port;

[0026] 310, connecting portion; 320, covering portion. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way limits the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Such as Figure 1As shown in the figure, an embodiment of the present utility model provides a waterproof and breathable valve detection device, which includes a box body 100, an exhaust member 300, a concentration detection member and a pressure detection member. Among them, the box body 100 has a gas chamber. A first exhaust port 101 and an air inlet 102 are provided on the side wall of the box body 100. Both the first exhaust port 101 and the air inlet 102 are communicated with the gas chamber. The first exhaust port 101 is used to install a waterproof and breathable valve 200, and the air inlet 102 is used to introduce gas into the gas chamber. The exhaust member 300 is covered at the first exhaust port 101, and a second exhaust port 301 is provided on the exhaust member 300. The second exhaust port 301 is used to discharge the gas passing through the waterproof and breathable valve 200. Both the concentration detection member and the pressure detection member are provided on the box body 100. The pressure detection member is used to detect the pressure in the gas chamber, and the concentration detection member is used to detect the gas concentration in the gas chamber. A plurality of concentration detection members are provided, and the installation positions of the plurality of concentration detection members are spaced apart in the height direction.

[0029] Applying the technical solution of the present utility model, gas can be introduced into the gas chamber through the air inlet 102. The gas in the gas chamber can pass through the waterproof and breathable valve 200 provided at the first exhaust port 101 to the exhaust member 300 and be discharged through the second exhaust port 301. During the process of the gas flowing from the gas chamber to the outside through the waterproof and breathable valve 200, the pressure detection member and the concentration detection member provided on the housing can detect the pressure and gas concentration in the concentration chamber, so as to measure the concentration diffusion rate of the waterproof and breathable valve 200, provide a reference for the number of waterproof and breathable valves set for the fuel cell, and improve the safety performance of the fuel cell during use. During the working process of the concentration detection member, by setting a plurality of concentration detection members and spacing the plurality of concentration detection members along the height direction, the gas concentration at different heights in the gas chamber can be detected in the height direction. When calculating, the average value of the readings of the plurality of concentration detection members can be taken, which overcomes the uneven distribution of gas in the gas chamber caused by gas density, improves the accuracy of the gas detection data in the gas chamber, and ensures the detection effect of the waterproof and breathable valve detection device.

[0030] Specifically, the box body 100 has a top cover 110 and a body 120 which are connected to each other. The body 120 has an opening. The top cover 110 is covered at the opening and forms a gas chamber together with the body 120. The top cover 110 and the body 120 can be connected by fasteners, and preferably can be connected by welding to improve the connection strength between the top cover 110 and the body 120 and ensure the airtightness of the gas chamber.

[0031] In the present application, first connection ports 103 are provided on both the top cover 110 and the body 120. The first connection ports 103 are used to install the concentration detection members. Through the above settings, the concentration detection members can detect the gas concentration in the middle and at the top of the gas chamber, improving the accuracy of detection.

[0032] Further, concentration detection components can also be arranged at different height positions on the main body 120 to further reduce the uneven gas distribution caused by the gas density and improve the detection effect of the concentration detection components.

[0033] Specifically in this application, the concentration detection component can be a gas concentration sensor, and the pressure detection component can be a pressure sensor.

[0034] In a specific embodiment of this application, the first exhaust port 101 is arranged on the top cover 110, the air inlet 102 is arranged on the main body 120, and the air inlet 102 is arranged at a position close to the bottom of the gas chamber, such as on the bottom edge of the side wall of the gas chamber. With such an arrangement, when the gas enters the gas chamber through the air inlet 102, it will automatically flow from the bottom of the gas chamber to the top of the gas chamber due to the pressure difference and be discharged through the waterproof breathable valve 200, so as to improve the uniformity of the gas distribution at various heights in the gas chamber.

[0035] Specifically in this application, a plurality of first exhaust ports 101 are provided, and a plurality of first exhaust ports 101 are all used for installing the waterproof breathable valve 200. Through the above arrangement, a plurality of waterproof breathable valves 200 can be arranged at a plurality of first exhaust ports 101 to improve the detection efficiency of the waterproof breathable valve detection device.

[0036] In some embodiments of this application, a plurality of exhaust components 300 are provided, and the plurality of exhaust components 300 are arranged in one-to-one correspondence with the plurality of first exhaust ports 101. With such an arrangement, the gas flow paths of a plurality of waterproof breathable valves 200 to be detected can be controlled through the plurality of exhaust components 300, so as to improve the control effect of the waterproof breathable valve detection device when detecting a plurality of waterproof breathable valves 200 simultaneously.

[0037] In still other embodiments of this application, only one exhaust component 300 can be provided, and one exhaust component 300 collects the gases discharged from a plurality of waterproof breathable valves 200 at the same time, which is convenient for the overall control of the waterproof breathable valve detection device when detecting a plurality of waterproof breathable valves 200 simultaneously.

[0038] In this application, the diameters of the plurality of first exhaust ports 101 are different to install waterproof breathable valves 200 of different sizes. With such an arrangement, it is possible to satisfy the simultaneous detection of a plurality of waterproof breathable valves 200 of different size specifications and improve the applicability of the waterproof breathable valve detection device.

[0039] Optionally, the diameters of the plurality of first exhaust ports 101 can also be the same to simultaneously detect a plurality of waterproof breathable valves 200 with the same size specifications.

[0040] Specifically, when the first exhaust ports 101 are provided in multiple numbers, a blocking member may also be provided at the first exhaust ports 101. The blocking member is used to block the first exhaust ports 101. When the waterproof breathable valve 200 is not provided at some of the first exhaust ports 101, that is, when the waterproof breathable valve 200 is not detected through all the first exhaust ports 101, the blocking member can block some of the first exhaust ports 101 to prevent gas leakage.

[0041] In the present application, the exhaust member 300 has a connecting portion 310 and a covering portion 320. The connecting portion 310 is used for fixedly connecting with the box body 100. The covering portion 320 covers the first exhaust port 101. The covering portion 320 has a receiving cavity for receiving the waterproof breathable valve 200. A second exhaust port 301 is provided on the side wall of the receiving cavity. Through the above arrangement, the receiving cavity can collect the gas dissipated from the waterproof breathable valve 200 and discharge it through the second exhaust port 301, which is convenient for the collection and treatment of experimental gas.

[0042] Specifically, there is a gap between the inner wall of the covering portion 320 and the waterproof breathable valve 200, that is, the waterproof breathable valve 200 does not contact the inner wall of the covering portion 320, so as to ensure the gas flow performance in the covering portion 320 and prevent the gas in the covering portion 320 from generating turbulent flow and affecting the normal flow of the fluids on both sides of the breathable membrane of the waterproof breathable valve 200.

[0043] Furthermore, the connecting portion 310 and the box body 100 are in sealed cooperation. Through the above arrangement, the airtightness in the covering portion 320 can be ensured, preventing gas from escaping to the outside through the gap between the connecting portion 310 and the box body 100, and ensuring the safety of the test environment.

[0044] Specifically, a sealing groove 130 is provided on the box body 100. The sealing groove 130 surrounds the outer periphery of the first exhaust port 101, and a sealing ring 140 is provided in the sealing groove 130. With this arrangement, the sealing ring 140 can block the gap between the connecting portion 310 and the box body 100, ensuring the sealing performance of the covering portion 320.

[0045] Optionally, the sealing groove 130 can also be provided on the connecting portion 310.

[0046] It can be understood that the sealing groove 130 can also be provided on both the box body 100 and the connecting portion 310 at the same time.

[0047] Specifically, referring to Figure 2 As shown, the box body 100 also has a third exhaust port 104 for discharging the gas in the gas chamber. By providing the third exhaust port 104, the air in the gas chamber can be discharged before the detection starts to improve the accuracy of the monitoring results, or the remaining inert gas after the detection ends, so as to facilitate gas recovery and improve the convenience of detection.

[0048] Furthermore, the installation positions of the third exhaust port 104 and the intake port 102 are spaced apart in the height direction. This can improve the exhaust effect of the gas in the gas chamber.

[0049] In this application, gas pipelines are connected to the intake port 102, the second exhaust port 301, and the third exhaust port 104, and flow control valves are provided on the gas pipelines. Through the above settings, the on / off of the gas pipeline can be controlled by the flow control valve, or the flow rate of the gas in the gas pipeline can be controlled, which is convenient for controlling the overall detection process and improving the operation convenience of the waterproof breathable valve detection device.

[0050] The embodiment of this application also provides a detection method for the concentration diffusion rate of the waterproof breathable valve, and the detection method is carried out using the above detection device.

[0051] Specifically, the detection method includes:

[0052] Step 1: Install the waterproof breathable valve 200, the exhaust member 300, the pressure detection member, the concentration detection member, and the connection pipeline on the box body 100;

[0053] Step 2: Perform an airtight test on the box body 100;

[0054] Step 3: Open the flow control valves at the intake port 102 and the third exhaust port 104, close the flow control valve at the second exhaust port 301, and continuously introduce the detection gas into the gas chamber through the intake port 102;

[0055] Step 4: Adjust the opening degrees of the flow control valves at the intake port 102 and the third exhaust port 104 to adjust the pressure in the gas chamber so that the pressure of the gas in the gas chamber is consistent with the atmospheric pressure. After the reading of the pressure detection member stabilizes at a gauge pressure of 0, close the flow control valves at the intake port 102 and the third exhaust port 104, and record the value of the pressure detection member at this time;

[0056] Step 5: Let the box body 100 stand still. After the gas is evenly distributed in the gas chamber, record the value of the helium concentration detection member;

[0057] Step 6: Open the flow control valve at the second exhaust port 301 and monitor the changes in the values of the pressure detection member and the concentration detection member;

[0058] Step 7: Read multiple concentration detection members and take the average value of the multiple concentration detection members.

[0059] Specifically, in Steps 1 to 7, the gas introduced is an inert gas, such as helium, to ensure safety during the test process.

[0060] In Step 3, to ensure that the original gas in the gas chamber is completely purged, the test gas can be continuously introduced into the box body 100 for 2 - 3 minutes.

[0061] After Step 4, to ensure that the pressure of the gas in the gas chamber is consistent with the atmospheric pressure, after the reading of the pressure detection component has been stable at a gauge pressure of 0 for 1 - 2 minutes, the flow control valves at the gas inlet 102 and the third exhaust port 104 can be closed.

[0062] In Step 5, to ensure the even distribution of the gas in the gas chamber, the box body 100 can be left stationary for 1 - 2 minutes and then the value of the helium concentration detection component can be recorded.

[0063] After Steps 1 to 7 are completed, according to Fick's law and Darcy's law, the parameters Ag and ε can be calibrated using the data measured by the pressure detection component and the average data of multiple concentration detection components in the experiment, so as to calculate the concentration difference diffusion rate of the breathing valve in the test gas environment. Then, according to the formula, it can be converted into hydrogen, and the measured hydrogen diffusion rate of the breathing valve can provide a reference for the number of breathing valves arranged on the fuel cell.

[0064] After the test is completed, according to Fick's law and Darcy's law, the parameters Ag and ε can be calibrated using the data measured in the experiment, the helium concentration difference diffusion rate of the breathing valve can be calculated, and then according to the formula, it can be converted into hydrogen. The measured hydrogen diffusion rate of the breathing valve can provide a reference for the number of breathing valves arranged on the fuel cell.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0066] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0067] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Without contrary statements, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0068] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. may be used here to describe the spatial positional relationships between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0069] In addition, it should be noted that the use of words such as "first", "second", etc. to define components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0070] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A waterproof breathable valve detection device, characterized in that: The waterproof breathable valve detection device comprises: A box body (100) having a gas cavity, a first exhaust port (101) and an air inlet (102) being arranged on a side wall of the box body (100), the first exhaust port (101) and the air inlet (102) both being in communication with the gas cavity, the first exhaust port (101) being used for installing a waterproof breathable valve (200), and the air inlet (102) being used for introducing gas into the gas cavity; An exhaust member (300), the cover of which is arranged at the first exhaust port (101), the exhaust member (300) is provided with a second exhaust port (301), and the second exhaust port (301) is used to exhaust the gas passing through the waterproof breathable valve (200); A concentration detection component and a pressure detection component, wherein the concentration detection component and the pressure detection component are both arranged on the box body (100), the pressure detection component is used to detect the pressure in the gas cavity, and the concentration detection component is used to detect the gas concentration in the gas cavity. A plurality of concentration detection components are arranged, and the installation positions of the plurality of concentration detection components are spaced apart in the height direction.

2. The waterproof breathable valve detection device according to claim 1, characterized in that: The box body (100) comprises a top cover (110) and a main body (120) which are connected to each other, the main body (120) has an opening, the top cover (110) is arranged at the opening and together with the main body (120) forms the gas cavity, the top cover (110) and the main body (120) are both provided with a first connection port (103), and the first connection port (103) is used for installing the concentration detection component.

3. The waterproof breathable valve detection device according to claim 1, characterized in that: A plurality of the first exhaust ports (101) are provided, and each of the plurality of the first exhaust ports (101) is used to install the waterproof air-permeable valve (200).

4. The waterproof breathable valve detection device according to claim 3, characterized in that: A plurality of the exhaust components (300) are provided, and the plurality of the exhaust components (300) are provided in a one-to-one correspondence with the plurality of the first exhaust ports (101).

5. The waterproof breathable valve detection device according to claim 3, characterized in that: The diameters of the plurality of first exhaust ports (101) are different so as to install waterproof and breathable valves (200) of different sizes.

6. The waterproof breathable valve detection device according to claim 1, characterized in that: The exhaust member (300) comprises a connecting portion (310) and a covering portion (320), wherein the connecting portion (310) is used for being fixedly connected to the box body (100), and the covering portion (320) is covered at the first exhaust port (101). The covering portion (320) comprises a accommodating cavity, and the accommodating cavity is used for accommodating the waterproof breathable valve (200), and the second exhaust port (301) is arranged on the side wall of the accommodating cavity.

7. The waterproof breathable valve detection device according to claim 6, characterized in that: The connection portion (310) and the box body (100) are sealed together.

8. The waterproof breathable valve detection device according to claim 7, characterized in that: The box body (100) is provided with a sealing groove (130), the sealing groove (130) is arranged around the outer periphery of the first exhaust port (101), and a sealing ring (140) is arranged in the sealing groove (130).

9. The waterproof breathable valve detection device according to claim 1, characterized in that: The box body (100) is also provided with a third exhaust port (104), and the third exhaust port (104) is used to exhaust the gas in the gas cavity.

10. The waterproof breathable valve detection device according to claim 9, characterized in that: The air inlet (102), the second exhaust port (301) and the third exhaust port (104) are all connected to a gas pipeline, and a flow control valve is provided on the gas pipeline.

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