Air tightness test system

Abstract

The utility model discloses an air tightness test system. The air tightness test system is used for detecting the air tightness of an electrolytic cavity of an electrolytic bath and comprises a reference part, a pressure difference detection assembly, an air source and a pressure regulating assembly, and the reference part is provided with a reference cavity; the pressure difference detection assembly is used for detecting the pressure difference between the reference cavity and the electrolysis cavity; the gas source is used for supplying gas to the electrolysis cavity and the reference cavity; and the pressure regulating assembly is connected to a gas supply pipeline of the gas source and is used for regulating the initial gas pressure in the reference cavity and the electrolysis cavity. The air tightness test system can effectively improve the air tightness detection precision of the electrolytic cell.

Description

Technical Field

[0001] The utility model relates to the technical field of airtightness detection equipment, in particular to an airtightness test system. Background Art

[0002] When detecting the electrolytic cell by the pressure holding method through the airtightness test system, usually, the initial pressure during the test is collected by the first pressure sensor and the final pressure in the electrolytic cell is collected by the second pressure sensor. The first pressure sensor is usually arranged close to the gas source, and the second pressure sensor is arranged close to the electrolytic cell. The pressure drop is calculated by the difference between the pressure values collected by the two pressure sensors.

[0003] However, during the test, the temperature of the gas source accessory and the temperature of the electrolytic cell usually change relative to the temperature of the gas source accessory. Since the change in temperature will cause the change in pressure, it is necessary to set a temperature sensor to record the temperature of the gas source accessory and the temperature of the electrolytic cell, and then convert the pressure to the same temperature for comparison through the ideal gas equation. This not only makes the calculation cumbersome, but also easily leads to a large error in the airtightness detection of the electrolytic cell. In particular, when detecting the airtightness of an electrolytic cell with a large working pressure range, a pressure sensor with a large range needs to be used, and a pressure sensor with a large range usually has low accuracy, resulting in a greater error in the airtightness detection. Summary of the Utility Model

[0004] The embodiment of the present application discloses an airtightness test system, which can effectively improve the accuracy of the airtightness detection of the electrolytic cell.

[0005] In order to achieve the above object, the embodiment of the present application discloses an airtightness test system for detecting the airtightness of the electrolytic cavity of an electrolytic cell. The airtightness test system includes:

[0006] A reference piece having a reference cavity;

[0007] A differential pressure detection component for detecting the differential pressure between the reference cavity and the electrolytic cavity;

[0008] A gas source for supplying gas to the electrolytic cavity and the reference cavity;

[0009] A pressure regulating component connected to the gas supply pipeline of the gas source for adjusting the initial air pressure in the reference cavity and the electrolytic cavity.

[0010] In some possible implementation manners, the differential pressure detection component includes a differential pressure sensor connected between the reference cavity and the electrolytic cavity.

[0011] In some possible implementations, the differential pressure sensor includes a first differential pressure sensor and a second differential pressure sensor with different ranges, and the first differential pressure sensor and the second differential pressure sensor are connected in parallel between the reference chamber and the electrolysis chamber.

[0012] In some possible implementations, the pressure regulating assembly includes a pressure regulating valve and a pressure detecting member. The pressure regulating valve is connected to the gas supply pipeline of the gas source and is used to regulate the initial air pressures in the reference chamber and the electrolysis chamber. The pressure detecting member is respectively connected to the reference chamber and the electrolysis chamber and is used to detect the pressures in the reference chamber and the electrolysis chamber.

[0013] In some possible implementations, the reference chamber is connected between the pressure regulating valve and the electrolysis chamber;

[0014] The gas source is communicated with the reference chamber through a first main pipe, a first branch pipe and a second branch pipe. One end of the first main pipe is connected to the gas source, and the other end of the first main pipe is respectively connected to the first branch pipe and the second branch pipe. The pressure regulating valve is arranged on the first branch pipe, and a pressure stabilizing inflation valve is further connected between the pressure regulating valve and the reference chamber. A quick inflation valve is arranged on the second branch pipe.

[0015] In some possible implementations, the pressure regulating valve includes an electronic pressure regulating valve.

[0016] In some possible implementations, a flow meter assembly is connected to the outlet end of the pressure regulating assembly.

[0017] In some possible implementations, the flow meter assembly includes a first flow meter and a second flow meter with different ranges. The first flow meter is arranged on the first branch pipe and between the pressure regulating valve and the reference chamber, and the second flow meter is connected in parallel with the first flow meter.

[0018] In some possible implementations, the electrolysis chamber includes a first electrolysis chamber and a second electrolysis chamber arranged adjacent to each other. The outlet of the first electrolysis chamber is communicated with a third branch pipe. The third branch pipe is respectively connected to the first flow meter and the second flow meter, and a first flow valve is arranged on the third branch pipe. The outlet of the second electrolysis chamber is communicated with a fourth branch pipe. The fourth branch pipe is respectively connected to the first flow meter and the second flow meter, and a second flow valve is arranged on the fourth branch pipe. Both the first flow meter and the second flow meter are connected to a fifth branch pipe, and a post-exhaust valve is arranged on the fifth branch pipe.

[0019] In some possible implementations, an overpressure active exhaust valve is connected to the outlet end of the gas source.

[0020] Compared with the prior art, the present application has at least the following beneficial effects:

[0021] In the present application, by providing a reference member having a reference chamber, and using a differential pressure detection component to detect the differential pressure between the reference chamber and the electrolytic chamber of the electrolytic cell. When performing an airtightness test on the electrolytic chamber, the reference member and the electrolytic cell are placed under the same working conditions, so that the reference chamber and the electrolytic chamber can be located in the same temperature field. When detecting the differential pressure between the reference chamber and the electrolytic chamber through the differential pressure detection component, it is possible to obtain the differential pressure between the reference chamber and the electrolytic chamber more intuitively without considering the influence of temperature change on pressure, thereby being able to simply and conveniently detect the airtightness of the electrolytic chamber. This can not only improve the accuracy of the airtightness detection of the electrolytic cell, but also obtain the airtightness of the electrolytic chamber without complex calculations, improving the efficiency of the airtightness detection of the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the airtightness detection of an electrolytic cell by the first airtightness test system provided by the embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of the airtightness detection of an electrolytic cell by the second airtightness test system provided by the embodiment of the present application;

[0025] Figure 3 It is a schematic diagram of the airtightness detection of an electrolytic cell by the third airtightness test system provided by the embodiment of the present application;

[0026] Figure 4 It is a schematic diagram of the airtightness detection of an electrolytic cell by the fourth airtightness test system provided by the embodiment of the present application.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS:

[0028] 1 - Gas source; 2 - Pressure regulating assembly; 21 - Electronic pressure regulator; 3 - Reference component; 31 - Reference chamber; 4 - Differential pressure detection assembly; 41 - Pressure sensor; 42 - First differential pressure sensor; 43 - Second differential pressure sensor; 5 - Flowmeter assembly; 51 - First flowmeter; 52 - Second flowmeter; 6a - Stabilizing inflation valve; 6b - Quick inflation valve; 7a - First main pipe; 7b - First branch pipe; 7c - Second branch pipe; 7d - Third branch pipe; 7e - Fourth branch pipe; 7f - Fifth branch pipe; 7g - Sixth branch pipe; 7h - Seventh branch pipe; 7i - Second main pipe; 8a - First flow valve; 8b - Second flow valve; 9a - Rear exhaust valve; 9b - First exhaust valve; 9c - Second exhaust valve; 9d - Quick exhaust valve; 9e - Overpressure active exhaust valve;

[0029] 10 - Electrolytic cell; 101 - First electrolytic chamber; 102 - Second electrolytic chamber. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0032] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the terms "installed", "set up", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] The embodiment of the present application discloses an airtightness test system, which can effectively improve the accuracy of airtightness detection of the electrolytic cell.

[0036] The technical solution of the present application will be described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0037] The embodiment of the present application provides an airtightness test system for detecting the airtightness of the electrolytic cavity of an electrolytic cell, as Figure 1 shown, the airtightness test system includes a reference piece 3, a differential pressure detection component 4, a gas source 1, and a pressure regulating component 2. Among them, the reference piece 3 has a reference cavity 31; the differential pressure detection component 4 is used to detect the differential pressure between the reference cavity 31 and the electrolytic cavity; the gas source 1 is used to supply gas to the electrolytic cavity and the reference cavity 31; the pressure regulating component 2 is connected to the gas supply pipeline of the gas source 1 and is used to adjust the initial air pressure in the reference cavity 31 and the electrolytic cavity.

[0038] In this embodiment, by setting the reference piece 3 with the reference cavity 31 and using the differential pressure detection component 4 to detect the differential pressure between the reference cavity 31 and the electrolytic cavity of the electrolytic cell 10, when performing the airtightness test on the electrolytic cavity, the reference piece 3 and the electrolytic cell 10 are placed under the same working conditions, so that the reference cavity 31 and the electrolytic cavity can be located in the same temperature field. When detecting the differential pressure between the reference cavity 31 and the electrolytic cavity through the differential pressure detection component 4, the influence of temperature change on pressure does not need to be considered, and the differential pressure between the reference cavity 31 and the electrolytic cavity can be obtained more intuitively, so that the airtightness of the electrolytic cavity can be detected simply and conveniently. It can not only improve the accuracy of airtightness detection of the electrolytic cell 10, but also obtain the airtightness of the electrolytic cavity without complex calculations, thereby improving the efficiency of airtightness detection of the electrolytic cell 10.

[0039] In addition, it is connected to the gas supply pipeline of the gas source 1 through the pressure regulating component 2 and is used to adjust the initial air pressures in the reference chamber 31 and the electrolysis chamber, enabling the airtightness testing system to perform airtightness detection on the electrolysis chamber at multiple pressure segments and improving the practicability of the airtightness testing system.

[0040] It should be explained that the above-mentioned pressure regulating component 2 is used to adjust the initial air pressures in the reference chamber 31 and the electrolysis chamber. Among them, the initial air pressure refers to the air pressure reached in the reference chamber 31 and the electrolysis chamber for testing after the gas source 1 supplies gas to the reference chamber 31 and the electrolysis chamber.

[0041] It should also be explained that the above-mentioned reference chamber 31 refers to a chamber with good airtightness, which can provide a comparison for the airtightness detection of the electrolysis chamber and can be sealed.

[0042] Among them, the reference part 3 and the electrolysis cell 10 can be in parallel or in series in this airtightness testing system, that is, the reference chamber 31 and the electrolysis chamber can be in parallel or in series in the airtightness testing system, and no limitation is made here.

[0043] The above-mentioned gas source 1 can be nitrogen, helium, nitrogen-helium mixed gas, hydrogen-nitrogen mixed gas, etc., and no limitation is made here.

[0044] Optionally, as Figure 1 shown, the differential pressure detection component 4 includes a differential pressure sensor, and the differential pressure sensor is connected between the reference chamber 31 and the electrolysis chamber.

[0045] Thus, the differential pressure between the electrolysis chamber and the reference chamber 31 can be directly read out through the differential pressure sensor, so as to directly judge the airtightness of the electrolysis chamber and simply and quickly judge whether there is leakage in the electrolysis chamber.

[0046] Of course, in other embodiments, the differential pressure detection component 4 may include two pressure sensors 41. One of the pressure sensors 41 is connected to the reference chamber 31, and the other pressure sensor 41 is connected to the electrolysis chamber. Thus, the airtightness of the electrolysis chamber can be more intuitively judged by taking the difference between the pressure values detected by the two pressure sensors 41. For example, when the difference between the pressure value of the pressure sensor 41 connected to the electrolysis chamber and the pressure value of the pressure sensor 41 connected to the reference chamber 31 is zero or a value close to zero, it can be considered that the airtightness of the electrolysis chamber meets the standard. If the difference between the two is relatively large from zero, it is considered that the airtightness of the electrolysis chamber does not meet the standard.

[0047] Optionally, as Figure 1 shown, the differential pressure sensor includes a first differential pressure sensor 42 and a second differential pressure sensor 43 with different ranges, and the first differential pressure sensor 42 and the second differential pressure sensor 43 are connected in parallel between the reference chamber 31 and the electrolysis chamber.

[0048] Thus, by connecting the first differential pressure sensor 42 and the second differential pressure sensor 43 with different ranges in parallel between the reference chamber 31 and the electrolytic chamber, one of the two differential pressure sensors can be selected for measurement according to different detection ranges and measurement accuracies, enabling the airtightness test system to take into account different detection ranges and measurement accuracies and effectively improving the practicality of the airtightness test system.

[0049] Among them, one of the first differential pressure sensor 42 and the second differential pressure sensor 43 can be a large-range differential pressure sensor, and the other can be a small-range differential pressure sensor.

[0050] In addition, valve bodies can be respectively connected to the open end and the outlet end of the reference chamber 31. For example, an inlet valve can be connected to the open end, and an outlet valve can be connected to the outlet end, so that when the air pressure in the reference chamber 31 reaches the required value, the reference chamber 31 can be conveniently sealed through the valve body. Similarly, valve bodies are respectively connected to the open end and the outlet end of the electrolytic chamber to facilitate the sealing of the electrolytic chamber.

[0051] In some embodiments, as Figure 1 shown, the pressure regulating assembly 2 includes a pressure regulating valve and a pressure detecting member. The pressure regulating valve is connected to the gas supply pipeline of the gas source 1 and is used to regulate the initial air pressure in the reference chamber 31 and the electrolytic chamber. The pressure detecting member is respectively connected to the reference chamber 31 and the electrolytic chamber and is used to detect the pressure in the reference chamber 31 and the electrolytic chamber.

[0052] Thus, the gas filled into the reference chamber 31 and the electrolytic chamber can be regulated through the pressure regulating valve, and the air pressures in the reference chamber 31 and the electrolytic chamber can be respectively detected through the pressure detecting member, so that the air pressures in the reference chamber 31 and the electrolytic chamber can be more accurately regulated to the initial air pressure, thereby facilitating the improvement of the airtightness detection accuracy of the electrolytic chamber.

[0053] Among them, the pressure regulating valve can be a manual pressure regulating valve or an automatic pressure regulating valve, which is not limited herein. The pressure detecting member can be a pressure sensor 41, a pressure gauge, etc., which is also not limited herein.

[0054] Exemplarily, when it is necessary to fill the reference chamber 31 and the electrolytic chamber with gas, the pressure regulating valve is adjusted to the required initial air pressure value, the gas source 1 and the pressure regulating valve are opened, the reference chamber 31 and the electrolytic chamber are filled with gas to the initial air pressure, and then the pressure detecting member is used to detect whether the reference chamber 31 and the electrolytic chamber reach the initial air pressure, and the pressure regulating valve is adjusted in time to adjust the air pressures in the reference chamber 31 and the electrolytic chamber to the initial air pressure.

[0055] When the pressure regulating valve is an automatic pressure regulating valve as described above, the pressure regulating valve can include an electronic pressure regulating valve 21.

[0056] Thus, the pressure regulating valve can have a relatively fast response speed, high precision, and good stability. Moreover, compared with the method of adjusting to any pressure within a large pressure range by manually adjusting one or more pressure reducing valves, the airtightness test system can set multiple initial air pressure values through the electronic pressure regulating valve 21, realizing the setting of any pressure within a large pressure range, further improving the efficiency and precision of the airtightness detection of the electrolytic cell 10.

[0057] Specifically, the electronic pressure regulating valve 21 may include an electronic regulating mechanism, an actuator, a sensor, and a connector. When the pressure in the pipeline is lower than the value set by the pressure regulating valve, the electronic regulating mechanism in the electronic pressure regulating valve 21 can detect this situation and control the actuator in the electronic pressure regulating valve 21 to increase the gas flow rate to achieve the purpose of increasing the pressure; conversely, when the pressure in the system is higher than the set value, the gas flow rate will be correspondingly reduced to reduce the pressure.

[0058] Optionally, as Figure 2 shown, the reference chamber 31 is connected between the pressure regulating valve and the electrolytic chamber; the gas source 1 is communicated with the reference chamber 31 through the first main pipe 7a, the first branch pipe 7b, and the second branch pipe 7c. One end of the first main pipe 7a is connected to the gas source 1, and the other end of the first main pipe 7a is respectively connected to the first branch pipe 7b and the second branch pipe 7c. The pressure regulating valve is arranged on the first branch pipe 7b, and a pressure stabilizing inflation valve 6a is also connected between the pressure regulating valve and the reference chamber 31. A quick inflation valve 6b is arranged on the second branch pipe 7c.

[0059] Thus, when inflating the reference chamber 31 and the electrolytic chamber, the quick inflation valve 6b can be used to quickly inflate to a pressure value close to the initial air pressure, and then the pressure regulating valve and the pressure stabilizing inflation valve 6a can be used to inflate to the initial air pressure. This can not only make the reference chamber 31 and the electrolytic chamber be inflated to the initial air pressure relatively quickly, but also make the reference chamber 31 and the electrolytic chamber be inflated to the initial air pressure relatively accurately, further improving the efficiency and precision of the airtightness detection of the electrolytic cell 10.

[0060] It should be understood that the reference chamber 31 is connected between the pressure regulating valve and the electrolytic chamber, and the reference chamber 31 and the electrolytic chamber are connected in series in the pipeline.

[0061] In some embodiments, as Figure 3 shown, a flowmeter assembly 5 is connected to the outlet end of the pressure regulating assembly 2.

[0062] Thus, the flow rate in the pipeline can be detected through the flowmeter assembly 5 to facilitate timely adjustment of the air pressure in the pipeline.

[0063] Optionally, the flowmeter assembly 5 may include a first flowmeter 51 and a second flowmeter 52 with different ranges. The first flowmeter 51 is disposed on the first branch pipe 7b and is located between the pressure regulating valve and the reference chamber 31, and the second flowmeter 52 is connected in parallel with the first flowmeter 51.

[0064] Thus, the first flowmeter 51 and the second flowmeter 52 with different ranges can be connected in parallel between the pressure regulating valve and the reference chamber 31, so that when inflating the reference chamber 31 and the electrolytic chamber, any one of the two flowmeters can be selected according to different measurement ranges and measurement accuracies, thereby enabling the flowmeter assembly 5 to detect the flow rate while taking into account different measurement ranges and measurement accuracies, effectively improving the practicability of the airtightness test system.

[0065] Wherein, one of the first flowmeter 51 and the second flowmeter 52 may be a large-range flowmeter, and the other may be a small-range flowmeter.

[0066] Optionally, as Figure 4 shown, the electrolytic chamber includes a first electrolytic chamber 101 and a second electrolytic chamber 102 arranged adjacent to each other. The outlet of the first electrolytic chamber 101 is communicated with a third branch pipe 7d. The third branch pipe 7d is respectively connected to the first flowmeter 51 and the second flowmeter 52. A first flow valve 8a is arranged on the third branch pipe 7d. The outlet of the second electrolytic chamber 102 is communicated with a fourth branch pipe 7e. The fourth branch pipe 7e is respectively connected to the first flowmeter 51 and the second flowmeter 52. A second flow valve 8b is arranged on the fourth branch pipe 7e. Both the first flowmeter 51 and the second flowmeter 52 are connected to a fifth branch pipe 7f. A post exhaust valve 9a is arranged on the fifth branch pipe 7f.

[0067] Thus, when detecting whether there is a leakage between the first electrolytic chamber 101 and the second electrolytic chamber 102, the first flowmeter 51 and the second flowmeter 52 can be used to detect whether there is gas flowing in the pipeline, so as to detect whether there is a leakage between the first electrolytic chamber 101 and the second electrolytic chamber 102, without the need to additionally set up a flowmeter for detection, saving costs.

[0068] Wherein, a first flow valve 8a is arranged on the third branch pipe 7d, which can adjust the gas flow rate in the third branch pipe 7d to prevent damage to the first flowmeter 51 and the second flowmeter 52 caused by a large flow rate in the third branch pipe 7d. Similarly, a second flow valve 8b is arranged on the fourth branch pipe 7e, which can adjust the gas flow rate in the fourth branch pipe 7e for the gas flowing out of the first electrolytic chamber 101 to prevent damage to the first flowmeter 51 and the second flowmeter 52 caused by a large flow rate in the third branch pipe 7d.

[0069] A post-exhaust valve 9a is provided on the fifth branch pipe 7f, so that when there is a leakage between the first electrolysis chamber 101 and the second electrolysis chamber 102, it can be discharged through the post-exhaust valve 9a, enabling gas to flow in the third branch pipe 7d or the fourth branch pipe 7e, so that the first flowmeter 51 or the second flowmeter 52 can detect the flow rate, and then it can be timely detected whether there is a leakage between the first electrolysis chamber 101 and the second electrolysis chamber 102.

[0070] In addition, the outlet of the first electrolysis chamber 101 can be connected to a sixth branch pipe 7g. One end of the third branch pipe 7d can be connected to the sixth branch pipe 7g, and the other end can be connected to the first flowmeter 51 and the second flowmeter 52. The outlet of the second electrolysis chamber 102 can be connected to a seventh branch pipe 7h. One end of the fourth branch pipe 7e can be connected to the seventh branch pipe 7h, and the other end is connected to the first flowmeter 51 and the second flowmeter 52. The ends of the sixth branch pipe 7g far from the first electrolysis chamber 101 and the seventh branch pipe 7h far from the second electrolysis chamber 102 are connected to a second main pipe 7i. The end of the sixth branch pipe 7g close to the second main pipe 7i is connected to a first exhaust valve 9b to control the discharge of the gas in the first electrolysis chamber 101 through the first exhaust valve 9b. The end of the seventh branch pipe 7h close to the second main pipe 7i is connected to a second exhaust valve 9c to control the discharge of the gas in the second electrolysis chamber 102 through the second exhaust valve 9c. One end of the fifth branch pipe 7f is connected to the first flowmeter 51 and the second flowmeter 52, and the other end is connected to the second main pipe 7i. A quick exhaust valve 9d can be provided at the outlet end of the second main pipe 7i to enable the gas in the pipeline to be discharged in time.

[0071] When the electrolysis chamber includes a first electrolysis chamber 101 and a second electrolysis chamber 102, and the airtightness test of the pressure holding mode is carried out through this airtightness test system. Specifically, when the reference part 3 and the electrolysis part are in the same working condition environment, then open the reference chamber 31, the first electrolysis chamber 101 and the second electrolysis chamber 102, turn on the air source 1, open the quick inflation valve 6b to inflate the reference chamber 31, the first electrolysis chamber 101 and the second electrolysis chamber 102. When the air pressure in the reference chamber 31, the first electrolysis chamber 101 and the second electrolysis chamber 102 is close to the required initial air pressure, close the quick inflation valve 6b, open the pressure regulating valve and the constant pressure inflation valve 6a to continue inflating the reference chamber 31, the first electrolysis chamber 101 and the second electrolysis chamber 102 to the initial air pressure. At this time, the air pressures in the three chambers are the same; then, close the valves, seal the reference chamber 31, the first electrolysis chamber 101 and the second electrolysis chamber 102 to form three independent sealed chambers, and carry out pressure holding on the first electrolysis chamber 101 and the second electrolysis chamber 102 under the same pressure. At this time, the air pressure in the reference chamber 31 can be used as a reference for the air pressures in the first electrolysis chamber 101 and the second electrolysis chamber 102. After pressure holding for a period of time, the pressure differences between the reference chamber 31 and the first electrolysis chamber 101, and between the reference chamber 31 and the second electrolysis chamber 102 can be read out through the first differential pressure sensor 42 or the second differential pressure sensor 43, so as to realize the airtightness detection of the first electrolysis chamber 101 and the second electrolysis chamber 102.

[0072] The above is to carry out pressure holding on the first electrolysis chamber 101 and the second electrolysis chamber 102 under the same pressure to detect their airtightness. Of course, in other embodiments, the airtightness detection of different pressure holding on the first electrolysis chamber 101 and the second electrolysis chamber 102 can also be carried out. That is, after inflating the reference chamber 31, the first electrolysis chamber 101 and the second electrolysis chamber 102 to a certain air pressure, one of the first electrolysis chamber 101 and the second electrolysis chamber 102 can be closed first. For example, first close the first electrolysis chamber 101, and continue to inflate the reference chamber 31 and the second electrolysis chamber 102 to another set air pressure value. Then, seal the reference chamber 31 and the second electrolysis chamber 102 respectively, and carry out pressure holding on the first electrolysis chamber 101 and the second electrolysis chamber 102 under different pressures. At this time, the air pressure in the reference chamber 31 is used as a reference for the air pressure in the second electrolysis chamber 102. After pressure holding for a period of time, the pressure differences between the reference chamber 31 and the first electrolysis chamber 101, and between the reference chamber 31 and the second electrolysis chamber 102 can be read out through the first differential pressure sensor 42 or the second differential pressure sensor 43, so as to realize the airtightness detection of the first electrolysis chamber 101 and the second electrolysis chamber 102. Of course, the pressure difference value between the reference chamber 31 and the first electrolysis chamber 101 read out through the first differential pressure sensor 42 or the second differential pressure sensor 43 also needs to be obtained through simple calculation (such as removing the difference in the initial air pressure between the reference chamber 31 and the first electrolysis chamber 101) to obtain the leakage amount of the first electrolysis chamber 101 during this pressure holding period.

[0073] In addition, the airtightness testing system can also perform airtightness detection on the first electrolysis chamber 101 and the second electrolysis chamber 102 in the pre-flow method mode. Specifically, turn on the air source 1, open the pressure regulating valve, and one of the first flowmeter 51 and the second flowmeter 52 to perform constant pressure inflation on the first electrolysis chamber 101 and the second electrolysis chamber 102. Then, detect the pressure difference through the first pressure difference sensor 42 or the second pressure difference sensor 43 to judge the airtightness of the first electrolysis chamber 101 and the second electrolysis chamber 102, and the leakage rate can be directly read through the first pressure difference sensor 42 or the second pressure difference sensor 43. Of course, in this pre-flow method mode, the airtightness detection of the first electrolysis chamber 101 and the second electrolysis chamber 102 can be carried out under the same pressure or different pressures.

[0074] The airtightness testing system can also perform airtightness detection on the first electrolysis chamber 101 and the second electrolysis chamber 102 in the post-flow method mode. Specifically, first, turn on the air source 1, open the pressure regulating valve and the constant pressure inflation valve 6a, and perform constant pressure inflation on one of the first electrolysis chamber 101 and the second electrolysis chamber 102. Taking the constant pressure inflation of the first electrolysis chamber 101 as an example, at this time, close the outlet end of the first electrolysis chamber 101 and the inlet end of the second electrolysis chamber 102, open the outlet end of the second electrolysis chamber 102, and at the same time, open the second flow valve 8b, the post-exhaust valve 9a, and the quick exhaust valve 9d, and open the first flowmeter 51 or the second flowmeter 52. Of course, the pre-flow valves provided between the first flowmeter 51 and the pressure regulating valve and between the first flowmeter 51 and the reference chamber 31 should be closed; at this time, if the first flowmeter 51 or the second flowmeter 52 detects a flow rate, it can be judged that there is a leakage between the first electrolysis chamber 101 and the second electrolysis chamber 102.

[0075] In some other embodiments, as Figure 4 shown, an overpressure active exhaust valve 9e is connected to the outlet end of the air source 1.

[0076] Thus, when the air pressure in the pipeline is relatively high, it can be discharged in a timely manner through the differential pressure active exhaust valve, which plays a certain protective role for the structures such as the pressure regulating valve, the flowmeter, the flow valve, the reference chamber 31, and the electrolysis chamber in the pipeline.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An airtightness testing system for detecting the airtightness of an electrolytic chamber of an electrolytic cell (10), characterized in that: The airtightness testing system comprises: A reference piece (3), wherein the reference piece (3) has a reference cavity (31); A pressure difference detection component (4), the pressure difference detection component (4) is used to detect the pressure difference between the reference chamber (31) and the electrolysis chamber; A gas source (1), the gas source (1) being used to supply gas to the electrolysis chamber and the reference chamber (31); A pressure regulating component (2), the pressure regulating component (2) is connected to the gas supply pipeline of the gas source (1), and is used to adjust the initial gas pressure in the reference chamber (31) and the electrolysis chamber.

2. The airtightness testing system according to claim 1, characterized in that: The differential pressure detection assembly (4) comprises a differential pressure sensor, and the differential pressure sensor is connected between the reference chamber (31) and the electrolysis chamber.

3. The airtightness testing system according to claim 2, characterized in that: The differential pressure sensor comprises a first differential pressure sensor (42) and a second differential pressure sensor (43) having different measuring ranges. The first differential pressure sensor (42) and the second differential pressure sensor (43) are connected in parallel between the reference chamber (31) and the electrolysis chamber.

4. The airtightness testing system according to claim 1, characterized in that: The pressure regulating assembly (2) comprises a pressure regulating valve and a pressure detecting element. The pressure regulating valve is connected to the gas supply pipeline of the gas source (1) and is used to adjust the initial gas pressure in the reference chamber (31) and the electrolysis chamber. The pressure detecting element is respectively connected to the reference chamber (31) and the electrolysis chamber and is used to detect the pressure in the reference chamber (31) and the electrolysis chamber.

5. The airtightness testing system according to claim 4, characterized in that: The reference chamber (31) is connected between the pressure regulating valve and the electrolysis chamber; The gas source (1) is connected to the reference chamber (31) through a first main pipe (7a), a first branch pipe (7b) and a second branch pipe (7c); one end of the first main pipe (7a) is connected to the gas source (1); the other end of the first main pipe (7a) is respectively connected to the first branch pipe (7b) and the second branch pipe (7c); the pressure regulating valve is arranged on the first branch pipe (7b); a pressure-stabilizing inflation valve (6a) is also connected between the pressure regulating valve and the reference chamber (31); and a quick inflation valve (6b) is arranged on the second branch pipe (7c).

6. The airtightness testing system according to claim 4, characterized in that: The pressure regulating valve comprises an electronic pressure regulating valve (21).

7. The airtightness testing system according to claim 5, characterized in that: The outlet end of the pressure regulating component (2) is connected to a flow meter component (5).

8. The airtightness testing system according to claim 7, characterized in that: The flow meter assembly (5) comprises a first flow meter (51) and a second flow meter (52) having different measuring ranges; the first flow meter (51) is arranged on the first branch pipe (7b) and located between the pressure regulating valve and the reference chamber (31); the second flow meter (52) is connected in parallel with the first flow meter (51).

9. The airtightness testing system according to claim 8, characterized in that: The electrolysis chamber comprises a first electrolysis chamber (101) and a second electrolysis chamber (102) which are arranged adjacent to each other; the outlet of the first electrolysis chamber (101) is connected to a third branch pipe (7d), the third branch pipe (7d) is connected to the first flow meter (51) and the second flow meter (52) respectively, the third branch pipe (7d) is provided with a first flow valve (8a); the outlet of the second electrolysis chamber (102) is connected to a fourth branch pipe (7e), the fourth branch pipe (7e) is connected to the first flow meter (51) and the second flow meter (52) respectively, the fourth branch pipe (7e) is provided with a second flow valve (8b); the first flow meter (51) and the second flow meter (52) are both connected to a fifth branch pipe (7f), the fifth branch pipe (7f) is provided with a post-exhaust valve (9a).

10. The airtightness testing system according to any one of claims 1 to 6, characterized in that: The outlet end of the gas source (1) is connected to an overpressure active exhaust valve (9e).

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