Air tightness detection device
By using a high-precision soap bubble flow meter and a flexible pipeline design for airtightness testing, the environmental adaptability and accuracy issues of electrolytic cell airtightness testing have been solved, enabling rapid and accurate quantification of electrolytic cell leakage and improving testing efficiency and safety.
Patent Information
- Application Number
- CN202520283659.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-21
Smart Images
Figure CN223940468U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of airtightness testing equipment technology, and in particular to an airtightness testing device. Background Technology
[0002] Electrolysis technology, as an advanced technology in the field of hydrogen production, has been widely applied. After the electrolyzer is assembled, conducting a leak test is a crucial step in ensuring its performance and safety. Current mainstream technologies mostly rely on high-pressure gas storage tanks, directly supplying high-pressure gas to the electrolyzer through stainless steel pipelines. The presence of leaks is then initially determined by monitoring the fluctuations in the gas pressure gauge over several minutes. However, this traditional method has limitations in practical applications regarding the testing environment and accuracy. It is only suitable for fixed testing environments and struggles to accurately measure specific leak amounts, especially when detecting minute gas crosstalk between the anode and cathode of the electrolyzer. Even extremely small leaks, accumulated over time, can pose a significant threat to the safety performance of the electrolyzer, and may even lead to serious safety accidents. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art. This application provides an airtightness detection device capable of directly observing whether a high-voltage electrolytic cell leaks and directly reading the specific value of the leakage amount. This allows for precise quantification of the leakage amount in the electrolytic cell, thereby significantly improving detection efficiency and accuracy.
[0004] An airtightness detection device according to an embodiment of this application includes
[0005] An electrolytic cell, wherein the electrolytic cell is provided with a cathode output terminal and an anode input terminal;
[0006] A gas source, which provides high-pressure gas required for detection, and the output end of the gas source is provided with a first pipeline;
[0007] A flow control assembly, comprising a first flow control component and a second flow control component, for controlling the flow rate of gas;
[0008] A high-precision soap bubble flow meter, used to measure the flow rate of gas;
[0009] The gas source is connected to the anode input end through the first pipeline, the first flow control component is installed on the first pipeline, a second pipeline is provided between the cathode output end and the high-precision soap bubble flow meter, and the second flow control component is installed on the second pipeline. The gas flow rate is measured by the high-precision soap bubble flow meter to detect the airtightness of the electrolytic cell.
[0010] According to some embodiments of this application, the first pipeline includes a first flexible pipeline, the second pipeline includes a second flexible pipeline, the first flexible pipeline is disposed between the first flow control component and the anode input end, and the second flexible pipeline is disposed between the second flow control component and the high-precision soap bubble flow meter.
[0011] According to some embodiments of this application, it further includes an external leakage detection pipeline assembly and a differential pressure gauge. The flow control assembly further includes a third flow control component. The external leakage detection pipeline assembly includes a gas storage device, an external pipeline, and an external leakage flow control component. The gas storage device is connected to the external pipeline. The external leakage flow control component is disposed on the external pipeline. The third flow control component is disposed on the first pipeline. One end of the differential pressure gauge is disposed between the third flow control component and the electrolytic cell, and the other end of the differential pressure gauge is disposed between the external leakage flow control component and the gas storage device.
[0012] According to some embodiments of this application, the first pipeline is connected to a third pipeline, and the third pipeline is connected to the external pipeline.
[0013] According to some embodiments of this application, the electrolytic cell is further provided with a cathode input terminal, the first pipeline is further connected to a fourth pipeline, the fourth pipeline is connected to the cathode input terminal, and the flow control assembly further includes a fourth flow control component, the fourth flow control component being disposed on the fourth pipeline.
[0014] According to some embodiments of this application, an exhaust pipe is also included, and the flow control assembly further includes a fifth flow control component disposed on the exhaust pipe. One end of the exhaust pipe is connected to the first pipe, and the other end of the exhaust pipe is in communication with the external atmosphere.
[0015] According to some embodiments of this application, a pressure reducing valve is also included, which is disposed on the first pipeline and is used to control the gas pressure output by the gas source.
[0016] According to some embodiments of this application, a pressure gauge is also included, which is disposed on the first pipeline and disposed on the side facing the output end of the pressure reducing valve, and the pressure gauge is used to monitor the gas pressure value in real time.
[0017] According to some embodiments of this application, the first pipeline further includes a third flexible pipeline disposed between the gas source and the pressure reducing valve.
[0018] According to some embodiments of this application, the fourth pipeline includes a fourth flexible pipeline, the external pipeline includes a fifth flexible pipeline, the fourth flexible pipeline is disposed between the fourth flow control component and the cathode input terminal, and the fifth flexible pipeline is disposed between the external leakage flow control component and the gas storage device.
[0019] The airtightness detection device according to the embodiments of this application has at least the following beneficial effects:
[0020] The airtightness testing device of this application includes an electrolytic cell, a gas source, a flow control component, and a high-precision soap bubble flow meter. The electrolytic cell has a cathode output end and an anode input end. The output end of the gas source is provided with a first pipeline, through which the gas source is connected to the anode input end. A first flow control component is installed on the first pipeline, and the output gas from the gas source flows to the anode input end of the electrolytic cell through the first pipeline. A second pipeline is provided between the high-precision soap bubble flow meter and the cathode output end, and a second flow control component is installed on the second pipeline. Gas leaking inside the electrolytic cell flows from the cathode output end to the high-precision soap bubble flow meter through the second pipeline. The high-precision soap bubble flow meter measures the gas flow rate to detect the airtightness of the electrolytic cell. The high-precision soap bubble flow meter can directly determine whether there is a leak in the electrolytic cell and directly read the specific value of the leakage. Even if there is a tiny internal leak between the cathode and anode in the electrolytic cell, the leakage amount of the electrolytic cell can be accurately quantified. Throughout the testing process, the high-precision soap bubble flow meter not only has a fast response speed but also makes the operation simpler, significantly improving the testing efficiency and accuracy.
[0021] The first pipeline includes a first flexible pipeline, and the second pipeline includes a second flexible pipeline. The first flexible pipeline is located between the first flow control component and the anode input end, and the second flexible pipeline is located between the second flow control component and the high-precision soap bubble flow meter. The flexible pipeline configuration enables the airtightness testing device to adapt to dynamic and complex testing environments, and further ensures the safety of the testing and the accuracy of the test results. Attached Figure Description
[0022] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0023] Figure 1 This is a schematic diagram of the structure of an airtightness testing device according to an embodiment of this application;
[0024] Figure 2 This is a schematic diagram of the structure of an airtightness testing device according to another embodiment of this application;
[0025] Figure 3 This is a schematic diagram of the structure of an airtightness testing device according to another embodiment of this application;
[0026] Figure 4This is a schematic diagram of the airtightness testing device according to another embodiment of this application.
[0027] Figure label:
[0028] Electrolytic cell 10; Anode input terminal 11; Cathode input terminal 12; Anode output terminal 13; Cathode output terminal 14;
[0029] Gas source 20;
[0030] Flow control component 30; first flow control element 31; second flow control element 32; third flow control element 33; fourth flow control element 34; fifth flow control element 35;
[0031] High-precision soap bubble flow meter 40;
[0032] First flexible conduit 51; Second flexible conduit 52; Third flexible conduit 53; Fourth flexible conduit 54; Fifth flexible conduit 55;
[0033] External leakage detection piping assembly 60; external piping 61; external leakage flow control component 62; gas storage device 63;
[0034] Differential pressure gauge 70;
[0035] Pressure reducing valve 80;
[0036] Pressure gauge 90;
[0037] First pipe 101; Second pipe 102; Third pipe 103; Fourth pipe 104; Exhaust pipe 105. Detailed Implementation
[0038] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0039] In the description of this application, it should be understood that the use of terms such as "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0041] The following reference Figures 1 to 3 Describe the airtightness detection device in the embodiments of this application.
[0042] according to Figure 1As shown, an embodiment of the airtightness testing device of this application includes an electrolytic cell 10, a gas source 20, a flow control component 30, and a high-precision soap bubble flow meter 40. The electrolytic cell 10 is provided with a cathode output terminal 14 and an anode input terminal 11. The flow control component 30 includes a first flow control component 31 and a second flow control component 32. The gas source 20 is used to provide the high-pressure gas required for testing. The output terminal of the gas source 20 is provided with a first pipeline 101. One end of the first pipeline 101 is connected to the output terminal of the gas source 20, and the other end of the first pipeline 101 is connected to the anode input terminal 11. The gas source 20 is connected to the anode input terminal 11 through the first pipeline 101. The first flow control component 31 is disposed on the first pipeline 101. The gas output from the gas source 20 flows to the anode input terminal 11 through the first pipeline 101. The first flow control component 31 controls the flow rate of the gas in the first pipeline 101. A second pipeline 102 is provided between the high-precision soap bubble flow meter 40 and the cathode output terminal 14. One end of the second pipeline 102 is connected to the high-precision soap bubble flow meter 40, and the other end of the second pipeline 102 is connected to the cathode output terminal 14. A second flow control component 32 is installed on the second pipeline 102 and controls the gas flow rate in the second pipeline 102. Gas leaking inside the electrolytic cell 10 flows from the cathode output terminal 14 through the second pipeline 102 to the high-precision soap bubble flow meter 40. The high-precision soap bubble flow meter 40 measures the gas flow rate to detect the airtightness of the electrolytic cell 10.
[0043] Initially, all flow control components are off. The gas source 20 and the first flow control component 31 are turned on, and the gas output from the gas source 20 flows through the first pipeline 101 to the anode input terminal 11 of the electrolytic cell 10. After the gas pressure in the electrolytic cell 10 stabilizes, the gas source 20 and the first flow control component 31 are turned off. The second flow control component 32 is turned on, and the gas flow rate is measured by the high-precision soap bubble flow meter 40. Data from the high-precision soap bubble flow meter 40 is obtained, and the presence of a leak in the electrolytic cell 10 is determined based on this data. If the high-precision soap bubble flow meter 40 remains unchanged, there is no internal leakage between the anode and cathode in the electrolytic cell 10. Conversely, if the high-precision soap bubble flow meter 40 changes, there is an internal leakage between the anode and cathode in the electrolytic cell 10. Gas from the anode enters the cathode and flows out at the cathode output terminal 14, while the leaked gas flows through the second pipeline 102 to the high-precision soap bubble flow meter 40.
[0044] The high-precision soap bubble flow meter 40 allows direct observation of whether there is leakage in the electrolytic cell 10, and can directly read the specific value of the leakage. Even if there is a tiny internal leakage between the cathode and anode in the electrolytic cell 10, the leakage amount of the electrolytic cell 10 can be accurately quantified. Throughout the detection process, the high-precision soap bubble flow meter 40 not only has a fast response speed, but also makes the operation simpler, greatly improving detection efficiency and accuracy.
[0045] In some embodiments, the gas source 20 is configured as a high-pressure gas storage tank. In other embodiments, the gas source 20 may also be configured as a high-pressure liquid gas storage tank or other device for providing high-pressure gas.
[0046] In some embodiments, the high-pressure gas is nitrogen. In other embodiments, the high-pressure gas may also be other inert gases or other non-inert gases that do not react with the electrolyzer.
[0047] In some embodiments, the first flow control component 31 and the second flow control component 32 are configured as shut-off valves. In other embodiments, the first flow control component 31 and the second flow control component 32 may also be configured as solenoid valves or other flow control components.
[0048] In some embodiments, according to Figure 1 As shown, the electrolytic cell 10 is also provided with a cathode input terminal 12 and an anode output terminal 13. The anode output terminal 13 and the cathode input terminal 12 of the electrolytic cell 10 are closed. In this embodiment, the anode output terminal 13 and the cathode input terminal 12 are closed to prevent gas from leaking from the anode output terminal 13 and the cathode input terminal 12. The gas output from the gas source 20 flows to the anode input terminal 11 through the first pipeline 101. In the event of a leak, the leaked gas flows from the cathode output terminal 14 through the second pipeline 102 to the high-precision soap bubble flow meter 40. The gas will only flow into the electrolytic cell from the anode input terminal 11 and out of the electrolytic cell from the cathode output terminal 14, with only one flow direction, thereby ensuring the accuracy of the airtightness test.
[0049] In some embodiments, the electrolytic cell 10 is configured as an AEM electrolytic cell.
[0050] according to Figure 1 As shown, in one embodiment of this application, the first pipeline 101 includes a first flexible pipeline 51, and the second pipeline 102 includes a second flexible pipeline 52. The first flexible pipeline 51 is disposed between the first flow control component 31 and the anode input end 11, and the second flexible pipeline 52 is disposed between the second flow control component 32 and the high-precision soap bubble flow meter 40. The flexible pipeline possesses high pressure resistance, corrosion resistance, temperature resistance, and flexibility. Using a flexible pipeline enables the airtightness testing device to adapt to dynamic and complex testing environments, further ensuring the safety of the test and the accuracy of the test results. The flexible pipeline is easier to replace than ordinary stainless steel pipelines, making the airtightness testing device easier to maintain.
[0051] according to Figure 2 and 3As shown, in one embodiment of this application, the airtightness detection device further includes an external leakage detection pipeline assembly 60 and a differential pressure gauge 70. The external leakage detection pipeline assembly 60 is used to detect the airtightness of the exterior of the electrolytic cell 10, and the differential pressure gauge 70 is used to measure whether there is a leak in the electrolytic cell and quantify the leakage. The flow control assembly 30 further includes a third flow control component 33, which is disposed on the first pipeline 101 and is used to control the flow rate of the gas in the first pipeline 101. The external leakage detection pipeline assembly 60 includes a gas storage device 63, an external pipeline 61, and an external leakage flow control component 62. The gas storage device 63 is connected to one end of the external pipeline 61, and the external leakage flow control component 62 is disposed on the external pipeline 61 and controls the flow rate of the gas in the external pipeline 61. One end of the differential pressure gauge 70 is disposed between the third flow control component 33 and the electrolytic cell 10, and the other end of the differential pressure gauge 70 is disposed between the external leakage flow control component 62 and the gas storage device 63.
[0052] In some embodiments, according to Figure 2As shown, the other end of the external pipeline 61 is connected to another high-pressure gas storage tank, which provides the gas required for the external leakage detection pipeline assembly. Initially, all flow control components are in the off state. The gas source 20 is opened, and the first flow control component 31 and the third flow control component 33 are opened. The gas output from the gas source 20 flows to the anode input terminal 11 through the first pipeline 101. Simultaneously, the high-pressure gas storage tank connected to the external leakage detection pipeline assembly 60 is opened, and the external leakage flow control component 62 is opened. The gas from the high-pressure gas storage tank flows to the storage tank through the external pipeline 61. When the gas storage device 63 reaches the set gas pressure value and the gas pressure is stable, the gas pressure in the electrolyzer 10 is also stable, and the differential pressure gauge 70 shows a value of 0, the gas source 20, the high-pressure gas storage tank, the third flow control component 33, and the external leakage flow control component 62 are closed. The second flow control component 32 is activated to obtain data from the high-precision soap bubble flow meter 40 and the differential pressure gauge 70. Based on these data, it is determined whether there is a leak in the electrolytic cell 10. If neither the high-precision soap bubble flow meter 40 nor the differential pressure gauge 70 changes, there is no internal leakage between the anode and cathode in the electrolytic cell 10. If the high-precision soap bubble flow meter 40 does not change, but the differential pressure gauge 70 changes, there is an external leak at the anode in the electrolytic cell 10. If the high-precision soap bubble flow meter 40 changes, but the differential pressure gauge 70 does not change, there is an internal leak between the anode and cathode in the electrolytic cell 10. However, this internal leak is extremely small, so small that the differential pressure gauge 70 cannot display it. This leakage can only be measured by the high-precision soap bubble flow meter 40, directly reading the specific value of the leak. The leakage amount in the electrolytic cell 10 is accurately quantified using the high-precision soap bubble flow meter 40. If both the high-precision soap bubble flow meter 40 and the differential pressure gauge 70 change, it means that there is an internal leak between the anode and cathode in the electrolytic cell 10, or that an internal leak in the electrolytic cell 10 and an external leak at the anode of the electrolytic cell 10 occur simultaneously. If only an internal leak exists in the electrolytic cell 10, the leakage amount can be accurately quantified by the high-precision soap bubble flow meter 40, and the specific value of the leakage amount can be read directly. Similarly, the specific leakage amount of the electrolytic cell 10 can also be determined by the data from the differential pressure gauge 70.
[0053] In other embodiments, according to Figure 3 As shown, the first pipeline 101 is connected to the third pipeline 103, and the other end of the external pipeline 61 is connected to the third pipeline 103. The third pipeline 103 is connected to the external pipeline 61 facing the input end of the external leakage flow control component 62. The gas in the electrolytic cell 10 and the gas storage device 63 is supplied by the gas source 20.
[0054] Initially, all flow control components are in the off state. The gas source 20 is turned on, along with the first flow control component 31, the third flow control component 33, and the external leakage flow control component 62. The gas output from the gas source 20 flows through the first pipeline 101 to the anode input terminal 11, and then through the first pipeline 101, the third pipeline 103, and the external pipeline 61 to the gas storage device 63. When the gas storage device 63 reaches the set gas pressure value and the gas pressure stabilizes, and the differential pressure gauge 70 reads 0, the gas source 20, the third flow control component 33, and the external leakage flow control component 62 are turned off. The second flow control component 32 is turned on to obtain data from the high-precision soap bubble flow meter 40 and the differential pressure gauge 70. Based on the data from the high-precision soap bubble flow meter 40 and the differential pressure gauge 70, it is determined whether there is a leak in the electrolytic cell 10. If neither the high-precision soap bubble flow meter 40 nor the differential pressure gauge 70 changes, it means there is no internal leakage between the anode and cathode in the electrolytic cell 10. If the high-precision soap bubble flow meter 40 remains unchanged, but the differential pressure gauge 70 changes, it indicates an external leak at the anode in the electrolytic cell 10. If the high-precision soap bubble flow meter 40 changes, but the differential pressure gauge 70 remains unchanged, it indicates an internal leak between the anode and cathode in the electrolytic cell 10. However, this internal leak is extremely small, so small that the differential pressure gauge 70 cannot display it. This leakage can only be measured by the high-precision soap bubble flow meter 40, which precisely quantifies the leakage in the electrolytic cell 10 and directly reads the specific value of the leakage. If both the high-precision soap bubble flow meter 40 and the differential pressure gauge 70 change, it indicates an internal leak between the anode and cathode in the electrolytic cell 10, or a simultaneous internal leak in the electrolytic cell 10 and an external leak at the anode. If only an internal leak exists in the electrolytic cell 10, the leakage amount can be accurately quantified by the high-precision soap bubble flow meter 40, and the specific value of the leakage can be directly read. Similarly, the specific leakage amount of the electrolytic cell 10 can be determined by the data from the differential pressure gauge 70. The arrangement that the gas for both the electrolytic cell 10 and the gas storage device 63 is supplied by the gas source 20 simplifies the airtightness detection device. The addition of the third pipeline 103 eliminates the need for an external high-pressure gas storage tank, thus simplifying the device.
[0055] In some embodiments, the third flow control component 33 and the external leakage flow control component 62 are configured as shut-off valves. In other embodiments, the third flow control component 33 and the external leakage flow control component 62 may also be configured as solenoid valves or other flow control components.
[0056] In some embodiments, the gas storage device 63 is configured as a high-pressure resistant gas cylinder. The gas storage device 63 is used to store gas and determine the gas pressure in the external leakage detection pipeline assembly 60. The gas storage device 63 cooperates with the differential pressure gauge 70 to balance the gas pressure of the pipelines on both sides of the differential pressure gauge 70.
[0057] In some embodiments, the differential pressure gauge 70 is configured as a high-precision electronic differential pressure gauge, which can directly read the specific value of the leakage when there is a leak.
[0058] according to Figure 4 As shown, in one embodiment of this application, the electrolytic cell 10 is further provided with a cathode input terminal 12, and the first pipeline 101 is also connected to a fourth pipeline 104. The fourth pipeline 104 is connected to the cathode input terminal 12, and the flow control assembly 30 further includes a fourth flow control component 34, which is disposed on the fourth pipeline 104 and controls the flow rate of the gas in the fourth pipeline 104. This embodiment can complete the external airtightness detection of the electrolytic cell 10, the external airtightness detection of the anode of the electrolytic cell 10, the external airtightness detection of the cathode of the electrolytic cell 10, and the internal airtightness detection of the cathode and anode of the electrolytic cell 10.
[0059] External airtightness test of electrolytic cell 10: Initially, all flow control components are in the off state. The gas source 20 is turned on, and the first flow control component 31, the third flow control component 33, the fourth flow control component 34, and the external leakage flow control component 62 are also turned on. The gas output from the gas source 20 flows through the first pipeline 101 to the anode input terminal 11, through the first pipeline 101 and the fourth pipeline 104 to the cathode input terminal 12, and through the first pipeline 101, the third pipeline 103, and the external pipeline 61 to the gas storage device 63. The anode output terminal 13 of the electrolytic cell 10 is sealed to prevent gas leakage from the anode output terminal 13. When the gas storage device 63 reaches the set gas pressure value and the gas pressure is stable, and the differential pressure gauge 70 shows a value of 0, the gas source 20, the third flow control component 33, and the external leakage flow control component 62 are turned off. Obtain the data from the differential pressure gauge 70, and determine whether there is a leak in the electrolytic cell 10 based on the data from the differential pressure gauge 70. If the differential pressure gauge 70 does not change (the value is 0), then there is no external leak in the electrolytic cell 10; otherwise, if the differential pressure gauge 70 changes (the value is not 0), then there is an external leak in the electrolytic cell 10. The specific amount of leakage from the external leak in the electrolytic cell 10 can be determined based on the specific value of the differential pressure gauge 70.
[0060] If no external leakage is found during the external airtightness test of electrolytic cell 10, the internal airtightness test of the cathode and anode of electrolytic cell 10 can then be performed. If external leakage is found during the external airtightness test of electrolytic cell 10, the external airtightness test of the anode and the external airtightness test of the cathode of electrolytic cell 10 need to be performed to determine the specific leakage situation of electrolytic cell 10.
[0061] Electrolytic cell 10 anode airtightness test: Initially, all flow control components are in the off state. The gas source 20 is turned on, and the first flow control component 31, the third flow control component 33, and the external leakage flow control component 62 are also turned on. The gas output from the gas source 20 flows through the first pipeline 101 to the anode input end 11, and then through the first pipeline 101 and the external pipeline 61 to the gas storage device 63. The anode output end 13 of the electrolytic cell 10 is sealed to prevent gas leakage from the anode output end 13. When the gas storage device 63 reaches the set gas pressure value and the gas pressure is stable, and the differential pressure gauge 70 reads 0, the gas source 20, the third flow control component 33, and the external leakage flow control component 62 are turned off. Obtain the data from the differential pressure gauge 70, and determine whether there is a leak at the anode of the electrolytic cell 10 based on the data from the differential pressure gauge 70. If the differential pressure gauge 70 does not change (the value is 0), there is no external leak at the anode of the electrolytic cell 10; conversely, if the differential pressure gauge 70 changes (the value is not 0), there is an external leak at the anode of the electrolytic cell 10. The specific leakage amount at the anode of the electrolytic cell 10 can be determined based on the specific value of the differential pressure gauge 70.
[0062] Electrolytic cell 10 cathode airtightness test: Initially, all flow control components are in the off state. The gas source 20 is turned on, and the third flow control component 33, the fourth flow control component 34, and the external leakage flow control component 62 are also turned on. The gas output from the gas source 20 flows to the cathode input end 12 through the first pipeline 101 and the fourth pipeline 104, and then flows to the gas storage device 63 through the first pipeline 101 and the external pipeline 61. The anode output end 13 of the electrolytic cell 10 is sealed to prevent gas leakage from the anode output end 13. When the gas storage device 63 reaches the set gas pressure value and the gas pressure is stable, and the differential pressure gauge 70 reads 0, the gas source 20, the third flow control component 33, and the external leakage flow control component 62 are turned off. Obtain the data from differential pressure gauge 70, and determine whether there is a leak at the cathode of electrolytic cell 10 based on the data from differential pressure gauge 70. If differential pressure gauge 70 does not change (the value is 0), there is no external leak at the cathode of electrolytic cell 10; conversely, if differential pressure gauge 70 changes (the value is not 0), there is an external leak at the cathode of electrolytic cell 10. The specific leakage amount at the cathode of electrolytic cell 10 can be determined based on the specific value of differential pressure gauge 70.
[0063] After completing the external airtightness test of electrolytic cell 10, if there is no external leakage, the internal airtightness test of the cathode and anode of electrolytic cell 10 is then carried out.
[0064] Internal airtightness test of the cathode and anode of electrolytic cell 10: Initially, all flow control components are in the off state. The gas source 20 is opened, and the first flow control component 31, the third flow control component 33, and the external leakage flow control component 62 are also opened. The gas output from the gas source 20 flows through the first pipeline 101 to the anode input end 11, and then through the first pipeline 101 and the external pipeline 61 to the gas storage device 63. The anode output end 13 of the electrolytic cell 10 is sealed to prevent gas leakage from the anode output end 13. When the gas storage device 63 reaches the set gas pressure value and the gas pressure is stable, and the differential pressure gauge 70 shows a value of 0, the gas source 20, the third flow control component 33, and the external leakage flow control component 62 are closed. The second flow control component 32 is activated to obtain data from the high-precision soap bubble flow meter 40. Based on this data, it is determined whether there is a leak in the electrolytic cell 10. If the high-precision soap bubble flow meter 40 remains unchanged, there is no internal leakage between the anode and cathode in the electrolytic cell 10. Conversely, if the high-precision soap bubble flow meter 40 changes, there is an internal leakage between the anode and cathode in the electrolytic cell 10. The high-precision soap bubble flow meter 40 allows direct observation of whether there is a leak in the electrolytic cell 10 and direct reading of the specific leakage amount. Even a minor internal leak between the anode and cathode in the electrolytic cell 10 can be accurately quantified. Throughout the detection process, the high-precision soap bubble flow meter 40 not only has a fast response speed but also simplifies operation, greatly improving detection efficiency and accuracy.
[0065] At the same time, the data of differential pressure gauge 70 can be used to determine whether there is an internal leak in electrolytic cell 10. If differential pressure gauge 70 does not change (the value is 0), then there is no internal leak in electrolytic cell 10; otherwise, if differential pressure gauge 70 changes (the value is not 0), then there is an internal leak in electrolytic cell 10. The specific amount of leakage can be determined based on the specific value of differential pressure gauge 70.
[0066] In cases of internal leakage, using a high-precision soap bubble flow meter 40 to detect internal leaks offers several advantages over using a differential pressure gauge 70. The former is faster, easier to operate, and more accurate, directly reading the specific leakage amount. It can even detect minute internal leaks and quantify them precisely. The latter, however, has lower accuracy and may result in less precise quantification of the leakage amount. Throughout the detection process, the high-precision soap bubble flow meter 40 not only reacts quickly but also simplifies operation, significantly improving detection efficiency and accuracy.
[0067] During the testing process, the gas supply can be cut off at any time by shutting down the flow control component, thereby ensuring the safety of the operators.
[0068] according to Figure 1 and Figure 2 As shown, in one embodiment of this application, the airtightness detection device further includes an exhaust pipe 105, and the flow control component 30 further includes a fifth flow control component 35. The fifth flow control component 35 is disposed on the exhaust pipe 105 and controls the flow rate of the gas in the exhaust pipe 105. One end of the exhaust pipe 105 is connected to the first pipe 101, and the other end of the exhaust pipe 105 is connected to the external atmosphere.
[0069] After completing the airtightness test, open the fifth flow control component 35 to vent the airtightness testing device through the exhaust pipe 105. After venting is complete, close all flow control components and adjust the pressure reducing valve 80 to the minimum flow rate.
[0070] Before venting, the external leakage flow control component 62 can be closed, thereby retaining the gas in the gas storage device 63 for use in the next airtightness test, thus saving gas, recycling it, reducing waste, and reducing testing costs.
[0071] In some other embodiments, according to Figure 3 and Figure 4 One end of the exhaust pipe 105 can also be connected to the intersection of the third pipe 103 and the external pipe 61, and the other end of the exhaust pipe 105 is connected to the external atmosphere.
[0072] In some embodiments, the fifth flow control component 35 is configured as a shut-off valve. In other embodiments, the fifth flow control component 35 may also be configured as a solenoid valve or other flow control component.
[0073] according to Figure 1 , 2 As shown in Figures 3 and 4, in one embodiment of this application, the airtightness testing device further includes a pressure reducing valve 80. The pressure reducing valve 80 is disposed on the first pipeline 101 and is used to control the gas pressure output by the gas source 20. The pressure reducing valve 80 controls the gas pressure output by the gas source 20, reducing the pressure of the high-pressure fluid in the gas source 20 to the required pressure range and ensuring the stability of the output pressure. This reduces the risk of damage to the entire airtightness testing device due to excessive gas pressure, and also improves the safety of the operator. The pressure can also be adjusted to the minimum range that meets the requirements through the pressure reducing valve 80, thereby reducing testing costs.
[0074] according to Figure 1 , 2As shown in Figures 3 and 4, in one embodiment of this application, the airtightness testing device further includes a pressure gauge 90. The pressure gauge 90 is disposed on the first pipeline 101, and is positioned on the side facing the output end of the pressure reducing valve 80. The pressure gauge 90 is used to monitor the gas pressure value in real time. The pressure gauge 90 is used to detect the gas pressure value output by the pressure reducing valve 80, thereby monitoring the gas pressure value of the airtightness testing device in real time. During the testing process, the pressure reducing valve 80 is adjusted according to the value of the pressure gauge 90, thereby adjusting the pressure of the gas to be tested to the set pressure value, ensuring that the testing process is carried out within the set pressure range.
[0075] according to Figure 2 , 3 As shown in Figure 4, in one embodiment of this application, the first pipeline 101 further includes a third flexible pipeline 53, which is disposed between the air source 20 and the pressure reducing valve 80. The flexible pipeline possesses excellent pressure resistance, corrosion resistance, and temperature resistance, while also exhibiting outstanding flexibility. These characteristics enable the airtightness testing device to better adapt to dynamic and complex testing environments, improving the safety of the test and the accuracy of the results. Compared to traditional stainless steel pipelines, flexible pipelines are easier to replace, thus significantly improving the maintenance efficiency of the airtightness testing device.
[0076] according to Figure 3 and 4 As shown, in one embodiment of this application, the fourth pipeline 104 includes a fourth flexible pipeline 54, and the external pipeline 61 includes a fifth flexible pipeline 55. The fourth flexible pipeline 54 is disposed between the fourth flow control component 34 and the cathode input terminal 12, and the fifth flexible pipeline 55 is disposed between the external leakage flow control component 62 and the gas storage device 63. The flexible pipeline design ensures smooth gas flow within the airtightness detection device while reducing the risk of leakage due to pipeline deformation or damage.
[0077] By using multiple flow control components and flexible piping, the specific configuration of the airtightness testing device can be easily adjusted to meet the testing requirements of different specifications or types of electrolytic cells 10.
[0078] In the description of this specification, the use of terms such as "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0079] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.
Claims
1. An airtightness testing device, characterized in that: include An electrolytic cell, wherein the electrolytic cell is provided with a cathode output terminal and an anode input terminal; A gas source, which provides high-pressure gas required for detection, and the output end of the gas source is provided with a first pipeline; A flow control assembly, comprising a first flow control component and a second flow control component, for controlling the flow rate of gas; A high-precision soap bubble flow meter, used to measure the flow rate of gas; The gas source is connected to the anode input end through the first pipeline, the first flow control component is installed on the first pipeline, and a second pipeline is provided between the cathode output end and the high-precision soap bubble flow meter, with the second flow control component installed on the second pipeline.
2. The airtightness testing device according to claim 1, characterized in that: The first pipeline includes a first flexible pipeline, and the second pipeline includes a second flexible pipeline. The first flexible pipeline is disposed between the first flow control component and the anode input end, and the second flexible pipeline is disposed between the second flow control component and the high-precision soap bubble flow meter.
3. The airtightness testing device according to claim 1, characterized in that: It also includes an external leakage detection pipeline assembly and a differential pressure gauge. The flow control assembly further includes a third flow control component. The external leakage detection pipeline assembly includes a gas storage device, an external pipeline, and an external leakage flow control component. The gas storage device is connected to the external pipeline. The external leakage flow control component is disposed on the external pipeline. The third flow control component is disposed on the first pipeline. One end of the differential pressure gauge is disposed between the third flow control component and the electrolytic cell, and the other end of the differential pressure gauge is disposed between the external leakage flow control component and the gas storage device.
4. The airtightness testing device according to claim 3, characterized in that: The first pipeline is connected to a third pipeline, which is connected to the external pipeline.
5. The airtightness testing device according to claim 3, characterized in that: The electrolytic cell is also provided with a cathode input terminal, and the first pipeline is also connected to a fourth pipeline, which is connected to the cathode input terminal. The flow control assembly also includes a fourth flow control component, which is disposed on the fourth pipeline.
6. The airtightness testing device according to claim 1, characterized in that: It also includes an exhaust pipe, and the flow control assembly further includes a fifth flow control component, which is disposed on the exhaust pipe. One end of the exhaust pipe is connected to the first pipe, and the other end of the exhaust pipe is in communication with the outside atmosphere.
7. The airtightness testing device according to claim 1, characterized in that: It also includes a pressure reducing valve, which is installed on the first pipeline.
8. The airtightness testing device according to claim 7, characterized in that: It also includes a pressure gauge, which is installed on the first pipeline and is positioned on the side facing the output end of the pressure reducing valve.
9. The airtightness testing device according to claim 7, characterized in that: The first pipeline also includes a third flexible pipeline, which is disposed between the gas source and the pressure reducing valve.
10. The airtightness testing device according to claim 5, characterized in that: The fourth pipeline includes a fourth flexible pipeline, and the external pipeline includes a fifth flexible pipeline. The fourth flexible pipeline is disposed between the fourth flow control component and the cathode input end, and the fifth flexible pipeline is disposed between the external leakage flow control component and the gas storage device.