Air tightness detection device

Abstract

The air tightness detection device comprises an installation mechanism, a sealing mechanism and a detection mechanism, the installation mechanism is provided with a first installation part and a second installation part which are arranged at intervals in the first direction, the sealing mechanism comprises an upper die assembly and a lower die assembly, and the side face, facing the upper die assembly, of the lower die assembly is provided with a product positioning groove; the detection mechanism comprises an air inflation assembly, an air pressure sensor and a main controller, the lower die assembly is provided with a detection hole located in the product positioning groove and a cavity communicated with the detection hole, the air inflation assembly is communicated with the cavity, the air pressure sensor is communicated with the cavity, and the main controller is connected with the air inflation assembly and the air pressure sensor; according to the air tightness detection device, the to-be-detected film body can be sealed on the product positioning groove, the cavity is inflated through the inflation assembly, and the air pressure sensor detects the air pressure of the cavity, so that the main controller can judge the air tightness detection result of the to-be-detected film body by comparing the inflation amount of the inflation assembly with the air pressure value detected by the air pressure sensor; and the overall detection efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of membrane testing technology, and in particular to an airtightness testing device. Background Technology

[0002] In flow batteries, ion exchange membranes not only separate the positive and negative electrolytes, but also improve battery performance, reduce self-discharge, and maintain electrolyte balance through their selective ion permeability. Therefore, they have become a key material for the development of flow battery technology.

[0003] Currently, most ion exchange membranes undergo visual inspection during production. However, since ion exchange membranes are transparent materials, visual inspection cannot accurately identify defects on the membrane surface such as pinholes, scratches, and cracks that affect airtightness. Traditional water immersion methods for testing airtightness are inefficient and can easily contaminate or damage the product, impacting production costs. Utility Model Content

[0004] Therefore, it is necessary to provide an airtightness testing device to address the aforementioned problem of the inconvenience in testing the airtightness of ion exchange membranes.

[0005] An airtightness detection device, comprising:

[0006] The mounting mechanism has a first mounting portion and a second mounting portion that are spaced apart along a first direction;

[0007] A sealing mechanism includes an upper mold assembly and a lower mold assembly. The upper mold assembly is vertically and slidably disposed on the first mounting part along the first direction, and the lower mold assembly is slidably disposed on the second mounting part along the second direction. The lower mold assembly has a product positioning groove on its side facing the upper mold assembly, and the second direction is perpendicular to the first direction.

[0008] The testing mechanism includes an inflation assembly, a pressure sensor, and a main controller. The lower mold assembly has a detection hole located in the product positioning groove and a cavity communicating with the detection hole. The inflation assembly is communicating with the cavity and is configured to inflate the cavity. The pressure sensor is communicating with the cavity and is configured to detect the pressure in the cavity. The main controller is connected to the inflation assembly and the pressure sensor, and determines whether the product is qualified by comparing the inflation volume of the inflation assembly with the pressure value detected by the pressure sensor.

[0009] In one embodiment, the mounting mechanism includes a frame and a limiting component disposed on the frame, and the lower mold assembly is spaced apart along the second direction, the limiting component being configured to restrict the position of the lower mold assembly.

[0010] In one embodiment, the mounting mechanism further includes an adjustment component connected to the limiting component and configured to adjust the position of the limiting component on the frame.

[0011] In one embodiment, the limiting component includes a trigger and a control circuit. The trigger is disposed on the adjusting component and connected to the control circuit. The control circuit is disposed on the frame and connected to the main controller. The control circuit is configured to give a signal to the main controller when the lower mold component contacts the trigger.

[0012] In one embodiment, the adjustment assembly includes an adjustment plate and an adjustment block. The trigger portion has an elongated opening parallel to the second direction. One end of the adjustment block is disposed on the adjustment plate, and the other end of the adjustment block is inserted into the elongated opening and abuts against the elongated opening.

[0013] In one embodiment, the limiting component includes a limit switch.

[0014] In one embodiment, the mounting mechanism further includes a buffer assembly disposed on the side of the lower mold assembly facing the limiting assembly.

[0015] In one embodiment, the buffer assembly includes a hydraulic buffer and a limiting block, the limiting block being spaced apart from the lower mold assembly along the second direction, and the hydraulic buffer connecting the limiting block and the lower mold assembly.

[0016] In one embodiment, the mounting mechanism is provided with an exhaust pipe that communicates with the cavity, and a sealing member configured to block the exhaust pipe.

[0017] In one embodiment, the exhaust pipe includes a pipe body and a connector, the connector being mounted on the mounting mechanism, the pipe body communicating with the cavity and the connector; the sealing element is suspended on the mounting mechanism by a chain, and the sealing element has a sealing head with a radius greater than or equal to the inner diameter of the connector.

[0018] The aforementioned airtightness testing device, through the cooperation of the upper mold assembly and the lower mold assembly, can seal the membrane to be tested on the product positioning groove, and inflate the cavity through the inflation assembly. The air pressure sensor detects the air pressure in the cavity, so that the main controller can judge the airtightness test result of the membrane to be tested by comparing the inflation volume of the inflation assembly and the air pressure value detected by the air pressure sensor. The overall testing efficiency is higher and the effect is better, effectively reducing production costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an airtightness testing device according to some embodiments of this application.

[0020] Figure 2 This is a schematic diagram of the airtightness testing device of some embodiments of this application from another perspective.

[0021] Figure 3 This is a schematic diagram of the structure between the limiting component, the adjusting component, and the buffer component of the airtightness detection device in some embodiments of this application.

[0022] Figure label:

[0023] 1. Installation mechanism;

[0024] 11. Rack;

[0025] 12. Limiting component; 121. Triggering part; 122. Control circuit;

[0026] 13. Adjustment component; 131. Adjustment plate; 132. Adjustment block;

[0027] 14. Buffer assembly; 141. Hydraulic damper; 142. Limit block;

[0028] 2. Sealing mechanism; 21. Upper mold assembly; 22. Lower mold assembly;

[0029] 3. Testing institutions. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do 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.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] See Figure 1 and Figure 2One embodiment of this application provides an airtightness testing device, including a mounting mechanism 1, a sealing mechanism 2, and a testing mechanism 3, both of which are mounted on the mounting mechanism 1. The mounting mechanism 1 has a first mounting portion and a second mounting portion spaced apart along a first direction. It is understood that the first direction is the direction of gravity, and the first and second mounting portions are spaced apart inside the mounting mechanism 1 along this direction.

[0037] The sealing mechanism 2 includes an upper mold assembly 21 and a lower mold assembly 22. The upper mold assembly 21 is vertically and flexibly mounted on a first mounting portion along a first direction, allowing it to move closer to or further away from the lower mold assembly 22 during lifting. The lower mold assembly 22 has a product positioning groove on its side facing the upper mold assembly 21, where the membrane to be tested can be placed for inspection. The lower mold assembly 22 is slidably mounted on a second mounting portion along a second direction, allowing personnel to place the membrane to be tested onto the product positioning groove. A sealing element is provided on the side of the upper mold assembly 21 facing the lower mold assembly 22, and the sealing element is spaced apart from the product positioning groove along the first direction. The upper mold assembly 21 can drive the sealing element to lift and lower, causing the sealing element to abut against the membrane to be tested on the product positioning groove, thereby sealing the membrane between the upper mold assembly 21 and the lower mold assembly 22 for subsequent airtightness testing.

[0038] The upper mold assembly 21 includes a telescopic motor, and the sealing element can be raised and lowered under the drive of the telescopic motor. The second direction is perpendicular to the first direction, so as to facilitate the lower mold assembly 22, which is pulled into the mounting mechanism 1, to cooperate with the upper mold assembly 21 and achieve sealing of the membrane to be tested.

[0039] The testing mechanism 3 includes an inflation component, a pressure sensor, and a main controller. The lower mold component 22 is provided with a testing hole located in the product positioning groove and a cavity communicating with the testing hole. The inflation component is communicating with the cavity and is configured to inflate the cavity. The inflated gas can enter between the membrane to be tested and the product positioning groove through the testing hole.

[0040] The pressure sensor is connected to the cavity and configured to detect the cavity pressure. The main controller is connected to the inflation assembly and the pressure sensor, and determines the product's qualification by comparing the inflation volume of the inflation assembly with the pressure value detected by the pressure sensor. Specifically, when the inflation volume of the inflation assembly matches the pressure value detected by the pressure sensor, it can be determined that the membrane under test has no leakage and its airtightness is qualified. When the inflation volume of the inflation assembly exceeds the pressure value detected by the pressure sensor, it can be determined that the membrane under test has leakage and its airtightness is unqualified.

[0041] In summary, when using the airtightness testing device of this application, the lower mold assembly 22 can be pulled out from the mounting mechanism 1 first, then the membrane to be tested can be placed on the product positioning groove. After placement, the lower mold assembly 22 can be pushed into the mounting mechanism 1. Then, the upper mold assembly 21 can be controlled to move the sealing element up and down, so that the upper mold assembly 21 and the lower mold assembly 22 can be combined, and the sealing element can abut against the membrane to be tested, forming a sealed membrane cavity above the detection hole. Then, air is inflated into the cavity through the inflation assembly, and the air pressure sensor detects the air pressure in the cavity. The main controller compares the inflation volume of the inflation assembly with the air pressure value detected by the air pressure sensor to determine the airtightness test result of the membrane to be tested. Compared with visual inspection methods and traditional water immersion test methods, the airtightness testing device of this application has higher detection efficiency, better detection effect, and is less likely to contaminate or damage the product during testing, effectively reducing production costs.

[0042] See Figure 1 and Figure 2 In one embodiment, the mounting mechanism 1 includes a frame 11 and a limiting component 12. An upper mold assembly 21 is vertically and slidably disposed within the frame 11 along a first direction, and a lower mold assembly 22 is slidably disposed within the frame 11 along a second direction. The limiting component 12 is disposed on the frame 11 and spaced apart from the lower mold assemblies 22 along the second direction. The limiting component 12 is configured to restrict the position of the lower mold assemblies 22 to assist them in reaching a predetermined position.

[0043] Specifically, in one embodiment, the limiting component 12 includes a limiting plate, and the lower mold component 22 can determine the predetermined position by sliding until it contacts the limiting plate when it is pushed into the mounting mechanism 1.

[0044] In another embodiment, the limiting component 12 includes a limit switch. When the lower mold component 22 is pushed into the mounting mechanism 1, it can slide to contact the limit switch to determine that it has reached a predetermined position. The limit switch is connected to the main controller so that when the limit switch contacts the lower mold component 22, it can give a signal to the main controller, so that the main controller can control the upper mold component 21 and the lower mold component 22 to merge, eliminating the need for subsequent manual operation, saving operation steps, and improving efficiency.

[0045] See Figures 1-3 In one embodiment, the mounting mechanism 1 further includes an adjustment component 13, which is connected to the limiting component 12 and configured to adjust the position of the limiting component 12 on the frame 11. By periodically adjusting the position of the limiting component 12, false triggering caused by inaccurate positioning can be reduced, thereby improving the reliability of the equipment.

[0046] Specifically, the limit assembly 12 includes a trigger part 121 and a control circuit 122. The control circuit 122 is mounted on the frame 11, and the trigger part 121 is mounted on the adjustment assembly 13 and connected to the control circuit 122. When the lower mold assembly 22 contacts the trigger part 121, the contacts on the trigger part 121 close with the contacts on the control circuit 122, triggering the limit switch. The control circuit 122 is connected to the main controller and sends a signal to the main controller when the lower mold assembly 22 contacts the trigger part 121, enabling the main controller to automatically control the upper mold assembly 21 to rise and fall, and merge with the lower mold assembly 22. This eliminates the need for manual operation of the main controller to control the upper mold assembly 21 to rise and fall, saving operation steps and improving efficiency.

[0047] Understandably, in the embodiments of this application, the limiting component 12 is a limit switch, and the trigger part 121 and the control circuit 122 are both part of the limit switch. Mechanical components such as levers and blocks in the limit switch may deform and wear during long-term use, affecting the trigger position of the limit switch. Furthermore, the rollers of the limit switch will gradually wear down over time, also affecting the trigger position. Therefore, to maintain positioning accuracy, the position of the limit switch needs to be adjusted periodically. This application provides an adjusting component 13, which is connected to the trigger part 121 of the limit switch, allowing the adjusting component 13 to adjust the position of the trigger part 121, thereby compensating for the deformation and wear of the mechanical components and ensuring positioning accuracy.

[0048] See Figures 1-3 In one embodiment, the adjustment assembly 13 includes an adjustment plate 131 and an adjustment block 132. The trigger part 121 has an elongated opening parallel to the second direction. One end of the adjustment block 132 is disposed on the adjustment plate 131, and the other end of the adjustment block 132 is inserted into the elongated opening and abuts against it. This structure allows the trigger part 121 to be fixed within the frame 11 by the adjustment block 132, and also allows the trigger part 121 to move along the second direction through the cooperation between the adjustment block 132 and the elongated opening, thereby adjusting its position within the frame 11 along the second direction. Specifically, during adjustment, the lower mold assembly 22 can be moved to a predetermined position first, and then the trigger part 121 can be moved to contact the lower mold assembly 22, thus completing the adjustment of the trigger part 121's position.

[0049] In one embodiment, the mounting mechanism 1 further includes a buffer component 14, which is disposed on the side of the lower mold component 22 facing the limiting component 12, so as to achieve the protection effect of the limiting component 12 during the pushing process.

[0050] Specifically, the mounting mechanism 1 is equipped with a linear guide rail, and the lower mold assembly 22 is slidably connected to the mounting mechanism 1 through the linear guide rail. When the lower mold assembly 22 slides through the linear guide rail, the friction generated by the linear guide rail will provide resistance to the pushing of the lower mold assembly 22. The unemployed person needs to give the lower mold assembly 22 a large pushing force. The buffer assembly 14 is set on the side of the lower mold assembly 22 facing the limit assembly 12, which can effectively prevent the limit assembly 12, which is a limit switch, from being damaged by a large impact.

[0051] More specifically, the buffer assembly 14 includes a hydraulic buffer 141 and a limiting block 142. The limiting block 142 and the lower mold assembly 22 are spaced apart along the second direction, and the hydraulic buffer 141 connects the limiting block 142 and the lower mold assembly 22. When the lower mold assembly 22 moves into position, the limiting block 142 contacts the limiting assembly 12, and the hydraulic buffer 141 buffers the contact force between the limiting block 142 and the limiting assembly 12.

[0052] In one embodiment, the mounting mechanism 1 is provided with an exhaust pipe that communicates with the cavity. After the test is completed, the gas injected by the inflation component can be discharged through the exhaust pipe. The mounting mechanism 1 is also provided with a sealing member configured to block the exhaust pipe. The sealing member can block the exhaust pipe during the test.

[0053] In one embodiment, the exhaust pipe includes a pipe body and a connector, the connector being mounted on the mounting mechanism 1, and the pipe body connecting the cavity and the connector. A sealing element is suspended on the mounting mechanism 1 by a chain, and the sealing element has a sealing head with a radius greater than or equal to the inner diameter of the connector. When testing is required, the sealing head can be inserted into the connector to seal the exhaust pipe. After testing is completed, the sealing head can be removed from the connector, allowing the exhaust pipe to discharge the gas injected into the inflation assembly.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An airtightness testing device, characterized in that, include: The mounting mechanism has a first mounting portion and a second mounting portion that are spaced apart along a first direction; A sealing mechanism includes an upper mold assembly and a lower mold assembly. The upper mold assembly is vertically and slidably disposed on the first mounting part along the first direction, and the lower mold assembly is slidably disposed on the second mounting part along the second direction. The lower mold assembly has a product positioning groove on its side facing the upper mold assembly, and the second direction is perpendicular to the first direction. The testing mechanism includes an inflation assembly, a pressure sensor, and a main controller. The lower mold assembly has a detection hole located in the product positioning groove and a cavity communicating with the detection hole. The inflation assembly is communicating with the cavity and is configured to inflate the cavity. The pressure sensor is communicating with the cavity and is configured to detect the pressure in the cavity. The main controller is connected to the inflation assembly and the pressure sensor, and determines whether the product is qualified by comparing the inflation volume of the inflation assembly with the pressure value detected by the pressure sensor.

2. The airtightness testing device according to claim 1, characterized in that, The mounting mechanism includes a frame and a limiting component. The limiting component is disposed on the frame, and the lower mold assembly is spaced apart along the second direction. The limiting component is configured to restrict the position of the lower mold assembly.

3. The airtightness testing device according to claim 2, characterized in that, The mounting mechanism further includes an adjustment component connected to the limiting component and configured to adjust the position of the limiting component on the frame.

4. The airtightness testing device according to claim 3, characterized in that, The limiting component includes a trigger part and a control circuit. The trigger part is disposed on the adjusting component and connected to the control circuit. The control circuit is disposed on the frame and connected to the main controller. The control circuit is configured to give a signal to the main controller when the lower mold component contacts the trigger part.

5. The airtightness testing device according to claim 4, characterized in that, The adjustment assembly includes an adjustment plate and an adjustment block. The trigger part is provided with an elongated opening parallel to the second direction. One end of the adjustment block is disposed on the adjustment plate, and the other end of the adjustment block is inserted into the elongated opening and abuts against the elongated opening.

6. The airtightness testing device according to claim 2, characterized in that, The limit component includes a travel switch.

7. The airtightness testing device according to claim 2, characterized in that, The mounting mechanism further includes a buffer assembly disposed on the side of the lower mold assembly facing the limiting assembly.

8. The airtightness testing device according to claim 7, characterized in that, The buffer assembly includes a hydraulic buffer and a limiting block. The limiting block and the lower mold assembly are spaced apart along the second direction. The hydraulic buffer connects the limiting block and the lower mold assembly.

9. The airtightness testing device according to claim 1, characterized in that, The mounting mechanism is provided with an exhaust pipe that communicates with the cavity, and a sealing member configured to block the exhaust pipe.

10. The airtightness testing device according to claim 9, characterized in that, The exhaust pipe includes a pipe body and a connector. The connector is mounted on the mounting mechanism, and the pipe body connects the cavity and the connector. The sealing element is hung on the mounting mechanism by a chain, and the sealing element has a sealing head with a radius greater than or equal to the inner diameter of the connector.

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