Bipolar plate air tightness detection device

Abstract

The utility model discloses a bipolar plate air tightness detection device, which comprises an upper frame plate, a supporting rod, a lower frame plate, a cylinder telescopic rod, a pressing block, an upper die, a lower die and a to-be-detected double template, the front side and the rear side of the top of the lower frame plate are respectively provided with a first fixing plate, and the left side and the right side of the top of the lower frame plate are respectively provided with a second fixing plate. And the first fixing plate is movably connected with the second fixing plate. According to the utility model, through the arrangement of the first fixing plates and the second fixing plates, when the to-be-detected dual-template is placed at the top of the lower die, the two groups of first fixing plates and the two groups of second fixing plates are used for fixing and sealing the to-be-detected dual-template, so that gas leakage during detection is prevented, and the problem that the to-be-detected dual-template cannot be detected due to tight contact and attachment of the upper die, the lower die and the to-be-detected dual-template is solved. The problems that the air pressure in a closed cavity is difficult to reach a set detection pressure value, the detection precision is reduced and misjudgment of a detection result is possibly caused due to the fact that the air pressure in the closed cavity is difficult to reach the set detection pressure value due to the fact that effective sealing measures are lacked at the edge are solved.

Description

Technical Field

[0001] This utility model relates to the field of bipolar plate testing technology, specifically a bipolar plate airtightness testing device. Background Technology

[0002] Bipolar plates, also known as current collectors, are one of the important components of fuel cells. They have the following functions and properties: separating fuel and oxidant and preventing gas from passing through; collecting and conducting current with high conductivity; designed and processed flow channels that can evenly distribute gas to the electrode reaction layer for electrode reaction; dissipating heat and maintaining a uniform temperature field in the cell; corrosion resistance; shock and vibration resistance; thinness; light weight; low cost; easy machining; and suitable for mass production.

[0003] For example, application number CN201920064004.4 discloses a tooling for testing the airtightness of fuel cell bipolar plates. This tooling includes an upper frame, a lower frame, a cylinder, a mounting frame, a fixing mold, and an air pressurization device. The upper and lower frame are fixedly connected by several support rods. The fixing mold is used to fix the bipolar plates to be tested. A cylinder is mounted on the upper frame, and a transparent tube filled with water is mounted on the mounting frame. The bottom of the transparent tube is connected to an external connecting pipe, which is connected to a first test tube. The air pressurization device is connected to a second and a third test tube. This utility model can test a small number of bipolar plates, avoiding the need to cut in line and disrupt the normal operation of the production line, or the need to use large instruments for testing when testing a small number of bipolar plates in actual production. This greatly saves production resources, reduces production costs, and improves production efficiency.

[0004] Based on the search of the aforementioned patents and the discovery of existing equipment, although the aforementioned equipment can solve the problem in application, when testing a small number of bipolar plates, turning on this type of machinery will waste a lot of energy and is complicated to operate. However, during use, because the upper and lower molds and the bipolar plate under test are in close contact and fit together, the edges lack effective sealing measures, and gas may leak from these gaps. This will not only make it difficult for the gas pressure in the closed cavity to reach the set detection pressure value, reducing the detection accuracy, but may also lead to misjudgment of the detection results. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a bipolar plate airtightness testing device, which has the advantage of dual-template testing and sealing. It solves the problem that when the upper and lower molds and the bipolar plate under test are in close contact and fit together, the edges lack effective sealing measures, and gas may leak from these gaps. This not only makes it difficult for the air pressure in the closed cavity to reach the set detection pressure value, reducing the detection accuracy, but may also lead to misjudgment of the detection results.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a bipolar plate airtightness testing device, comprising an upper frame plate, support rods, a lower frame plate, a cylinder telescopic rod, a pressure block, an upper mold, a lower mold, and a double template to be tested. The upper frame plate is disposed on top of the lower frame plate. The support rods are all fixedly connected to the four corners of the bottom of the upper frame plate, and the other end of the support rods is fixedly connected to the top of the lower frame plate. The cylinder telescopic rod is fixedly connected to the top of the upper frame plate. The pressure block is fixedly connected to the output end of the cylinder telescopic rod. The lower mold is fixedly connected to the top of the lower frame plate. The double template to be tested is movably connected to the top of the lower mold. The upper mold is movably connected to the bottom of the pressure block. The bottom of the upper mold is movably connected to the top of the double template to be tested. A first fixing plate is provided on the front and rear sides of the top of the lower frame plate. A second fixing plate is provided on the left and right sides of the top of the lower frame plate. The first fixing plate and the second fixing plate are movably connected. A sliding component is provided at the bottom of the first fixing plate and the bottom of the second fixing plate.

[0007] In a preferred embodiment of this utility model, the sliding assembly includes a slider and a first slide groove. The slider is fixedly connected to the bottom of the first fixed plate and the bottom of the second fixed plate. The first slide groove is opened on the front and left sides of the top of the lower frame plate and is symmetrically arranged. The slider is slidably connected to the first slide groove. A positioning mechanism is provided on the outer side of the slider.

[0008] In a preferred embodiment of this utility model, the positioning mechanism includes a fixed block, a groove, a positioning slot, a positioning element, and a first spring. The fixed block is fixedly connected to the outside of the slider, the grooves are all formed on both sides of the fixed block, the first spring is fixedly connected to the inside of the groove, the positioning element is fixedly connected to the other end of the first spring, the positioning slots are all formed on both sides inside the first slide groove, and the positioning element is movably connected to the positioning slot.

[0009] In a preferred embodiment of this invention, the top of the fixing block has through slots on both sides that are connected to the groove, and the top of the positioning member is fixedly connected to a fixing rod, which is movably connected to the through slot.

[0010] As a preferred embodiment of this utility model, a second sliding groove is provided on the outer side of the top of the fixing block, a U-shaped plate is provided on the top of the fixing block, the inner side of the U-shaped plate is movably connected to the fixing rod, and the U-shaped plate is slidably connected to the second sliding groove.

[0011] As a preferred embodiment of this utility model, a second spring is fixedly connected to the outer side of the inner side of the second groove, and the other end of the second spring is fixedly connected to the bottom of the outer side of the U-shaped plate.

[0012] As a preferred embodiment of this utility model, sealing gaskets are fixedly connected to the inner sides of both the first fixing plate and the second fixing plate, and the sealing gaskets are movably connected to the upper mold and the lower mold.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, by setting a first fixing plate and a second fixing plate, when the double template to be tested is placed on top of the lower mold, then the two sets of first fixing plates and two sets of second fixing plates fix and seal the double template to be tested, preventing gas leakage during testing. This solves the problem that when the upper mold and the lower mold and the double plate to be tested are in close contact and fit together, the edges lack effective sealing measures, and gas may leak from these gaps. This not only makes it difficult for the gas pressure in the closed cavity to reach the set detection pressure value, reducing the detection accuracy, but may also lead to misjudgment of the detection results. It has the advantage of double template detection sealing.

[0015] 2. This utility model, by setting a sliding component, allows the first and second fixed plates to move simultaneously when the double templates to be tested are placed on top of the lower mold. The slider then moves within the first sliding groove, thus limiting the movement of the first and second fixed plates and ensuring a more secure seal between them. Furthermore, by setting a positioning mechanism, when the first and second fixed plates contact and seal with the double templates to be tested, the slider moves the fixed block within the first sliding groove. Then, the first spring, which has been compressed, releases pressure, moving the positioning element. The positioning element then inserts into the positioning groove, thus positioning the fixed block and simultaneously fixing the first and second fixed plates, preventing slippage during the sealing of the double templates to be tested.

[0016] 3. This utility model, by setting a through groove and a fixing rod, allows the fixing rod to pass through the through groove and drive the positioning component to move along the inner wall of the through groove when it is necessary to release the positioning of the fixing block. Then, the positioning component drives the first spring to compress and retract, pulling it out of the positioning groove. Finally, the positioning component enters the groove, thus completing the release of the fixing block from the positioning. At the same time, the positioning of the first fixing plate and the second fixing plate is released. Furthermore, by setting a second sliding groove and a U-shaped plate, after the fixing rod drives the positioning component to contact the positioning along the inner wall of the through groove, the U-shaped plate moves along the inside of the second sliding groove. Then, the inner side of the U-shaped plate blocks the two sets of fixing rods, thereby preventing the fixing rods from automatically springing back and causing the positioning component to re-insert into the positioning groove. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional exploded view of the sliding component of this utility model;

[0019] Figure 3 This is a three-dimensional cross-sectional structural diagram of the positioning mechanism of this utility model.

[0020] In the diagram: 1. Upper frame plate; 2. Support rod; 3. Lower frame plate; 4. Cylinder telescopic rod; 5. Pressure block; 6. Upper mold; 7. Lower mold; 8. Double template to be tested; 9. First fixing plate; 10. Second fixing plate; 11. Sliding assembly; 111. Slider; 112. First slide groove; 12. Positioning mechanism; 121. Fixing block; 122. Groove; 123. Positioning groove; 124. Positioning component; 125. First spring; 13. Through groove; 14. Fixing rod; 15. Second slide groove; 16. U-shaped plate; 17. Second spring; 18. Sealing gasket. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 3 As shown, the present invention provides a bipolar plate airtightness testing device, comprising an upper frame plate 1, support rods 2, a lower frame plate 3, a cylinder telescopic rod 4, a pressure block 5, an upper mold 6, a lower mold 7, and a double mold plate to be tested 8. The upper frame plate 1 is disposed on top of the lower frame plate 3. The support rods 2 are all fixedly connected to the four corners of the bottom of the upper frame plate 1, and the other end of the support rods 2 is fixedly connected to the top of the lower frame plate 3. The cylinder telescopic rod 4 is fixedly connected to the top of the upper frame plate 1, and the pressure block 5 is fixedly connected to the output end of the cylinder telescopic rod 4. The lower mold 7... The upper mold 6 is fixedly connected to the top of the lower platen 3, the double template 8 to be tested is movably connected to the top of the lower mold 7, the upper mold 6 is movably connected to the bottom of the pressure block 5, the bottom of the upper mold 6 is movably connected to the top of the double template 8 to be tested, the front and rear sides of the top of the lower platen 3 are provided with first fixing plates 9, the left and right sides of the top of the lower platen 3 are provided with second fixing plates 10, the first fixing plates 9 and the second fixing plates 10 are movably connected, and the bottom of the first fixing plate 9 and the bottom of the second fixing plate 10 are provided with sliding components 11.

[0023] refer to Figure 2 The sliding component 11 includes a slider 111 and a first slide groove 112. The slider 111 is fixedly connected to the bottom of the first fixed plate 9 and the bottom of the second fixed plate 10. The first slide groove 112 is opened on the front and left sides of the top of the lower frame plate 3 and is symmetrically arranged. The slider 111 is slidably connected to the first slide groove 112. A positioning mechanism 12 is provided on the outside of the slider 111.

[0024] As a technical optimization of this utility model, by setting a sliding component 11, when the double template 8 to be tested is placed on the top of the lower mold 7, the first fixing plate 9 and the second fixing plate 10 simultaneously drive the slider 111 to move, and then the slider 111 moves inside the first slide groove 112, so that the slider 111 and the first slide groove 112 cooperate to limit the movement of the first fixing plate 9 and the second fixing plate 10, so that the first fixing plate 9 and the second fixing plate 10 seal the double template 8 to be tested more firmly.

[0025] refer to Figure 3 The positioning mechanism 12 includes a fixed block 121, a groove 122, a positioning groove 123, a positioning element 124, and a first spring 125. The fixed block 121 is fixedly connected to the outside of the slider 111. The grooves 122 are all opened on both sides of the fixed block 121. The first spring 125 is fixedly connected to the inside of the groove 122. The positioning element 124 is fixedly connected to the other end of the first spring 125. The positioning grooves 123 are all opened on both sides inside the first sliding groove 112. The positioning element 124 is movably connected to the positioning groove 123.

[0026] As a technical optimization of this utility model, by setting a positioning mechanism 12, when the first fixing plate 9 and the second fixing plate 10 are in contact and sealed with the double template 8 to be tested, the slider 111 drives the fixing block 121 to move inside the first slide groove 112. Then, the first spring 125, which is compressed, releases pressure and drives the positioning member 124 to move. After that, the positioning member 124 and the positioning groove 123 are inserted into each other, so that the positioning member 124 and the positioning groove 123 cooperate to complete the positioning of the fixing block 121, and at the same time fix the first fixing plate 9 and the second fixing plate 10 to prevent the first fixing plate 9 and the second fixing plate 10 from sliding when sealing the double template 8 to be tested.

[0027] refer to Figure 3 Both sides of the top of the fixing block 121 are provided with through grooves 13 and are connected to the groove 122. The top of the positioning member 124 is fixedly connected with a fixing rod 14, and the fixing rod 14 is movably connected to the through groove 13.

[0028] As a technical optimization of this utility model, by setting a through groove 13 and a fixing rod 14, when it is necessary to release the positioning of the fixing block 121, the fixing rod 14 passes through the through groove 13 and drives the positioning member 124 to move along the inner wall of the through groove 13. Then, the positioning member 124 drives the first spring 125 to squeeze and contract and be pulled out of the positioning groove 123. Finally, the positioning member 124 enters the groove 122, thus completing the release of the positioning of the fixing block 121 and releasing the positioning of the first fixing plate 9 and the second fixing plate 10.

[0029] refer to Figure 3The top outer side of the fixing block 121 is provided with a second sliding groove 15, and the top of the fixing block 121 is provided with a U-shaped plate 16. The inner side of the U-shaped plate 16 is movably connected to the fixing rod 14, and the U-shaped plate 16 is slidably connected to the second sliding groove 15.

[0030] As a technical optimization of this utility model, by setting a second sliding groove 15 and a U-shaped plate 16, after the fixing rod 14 drives the positioning member 124 to make contact positioning along the inner wall of the through groove 13, the U-shaped plate 16 moves along the inside of the second sliding groove 15, and then the inner side of the U-shaped plate 16 blocks the two sets of fixing rods 14, thereby preventing the fixing rods 14 from automatically springing back and resetting, causing the positioning member 124 to re-insert into the positioning groove 123.

[0031] refer to Figure 3 A second spring 17 is fixedly connected to the outer side of the inner side of the second groove 15, and the other end of the second spring 17 is fixedly connected to the bottom of the outer side of the U-shaped plate 16.

[0032] As a technical optimization of this utility model, by setting a second spring 17, in order to prevent the U-shaped plate 16 from sliding when blocking the two sets of fixing rods 14, the second spring 17 is fixedly connected inside the second groove 122, and then the second spring 17 drives the U-shaped plate 16 to move inward by releasing pressure.

[0033] refer to Figure 2 A sealing gasket 18 is fixedly connected to the inner side of the first fixing plate 9 and the inner side of the second fixing plate 10. The sealing gasket 18 is movably connected to the upper mold 6 and the lower mold 7.

[0034] As a technical optimization of this utility model, by setting a sealing gasket 18, when the first fixing plate 9 and the second fixing plate 10 are fixed and sealed, the sealing gasket 18 is fixed on its inner side and contacts the double template 8 to be tested, thereby enhancing the sealing effect and ensuring its greater stability.

[0035] The working principle and usage process of this utility model are as follows: When the double template 8 to be tested is placed on top of the lower mold 7, the first fixing plate 9 and the second fixing plate 10 simultaneously drive the slider 111 to move. Then, the slider 111 moves inside the first slide groove 112, thereby allowing the slider 111 and the first slide groove 112 to cooperate in limiting the movement of the first fixing plate 9 and the second fixing plate 10, making the seal between the first fixing plate 9 and the second fixing plate 10 on the double template 8 to be tested more secure. At the same time, the slider 111 drives the fixing block 121 to move inside the first slide groove 112, and then the compressed first spring 125 is released. The pressure drives the positioning element 124 to move, and then the positioning element 124 is inserted into the positioning groove 123, so that the positioning element 124 and the positioning groove 123 cooperate to position the fixing block 121. At the same time, the first fixing plate 9 and the second fixing plate 10 are fixed to prevent the first fixing plate 9 and the second fixing plate 10 from sliding when sealing the double template 8 to be tested. Thus, the double template testing and sealing advantages are achieved. At the same time, when the first fixing plate 9 and the second fixing plate 10 are fixing and sealing the double template 8 to be tested, the sealing gasket 18 is fixed on its inner side and contacts the double template 8 to be tested, thereby enhancing the sealing effect and ensuring its greater stability.

[0036] In summary, this bipolar plate airtightness testing device, through the setting of a first fixing plate 9 and a second fixing plate 10, when the bipolar plate to be tested 8 is placed on top of the lower mold 7, then the two sets of first fixing plates 9 and two sets of second fixing plates 10 fix and seal the bipolar plate to be tested, preventing gas leakage during testing. This solves the problem that when the upper mold and lower mold and the bipolar plate to be tested are in close contact and fit together, the edges lack effective sealing measures, and gas may leak from these gaps. This not only makes it difficult for the air pressure in the closed cavity to reach the set detection pressure value, reducing the detection accuracy, but may also lead to misjudgment of the detection results.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bipolar plate airtightness testing device, comprising an upper frame plate (1), a support rod (2), a lower frame plate (3), a cylinder telescopic rod (4), a pressure block (5), an upper mold (6), a lower mold (7), and a bipolar plate to be tested (8), characterized in that: The upper frame plate (1) is set on top of the lower frame plate (3). The support rods (2) are all fixedly connected to the four corners of the bottom of the upper frame plate (1). The other end of the support rod (2) is fixedly connected to the top of the lower frame plate (3). The cylinder telescopic rod (4) is fixedly connected to the top of the upper frame plate (1). The pressure block (5) is fixedly connected to the output end of the cylinder telescopic rod (4). The lower mold (7) is fixedly connected to the top of the lower frame plate (3). The double template to be tested (8) is movably connected to the top of the lower mold (7). The upper mold (6) is movably connected to the bottom of the pressure block (5). The bottom of the upper mold (6) is movably connected to the top of the double template (8) to be tested. The front and rear sides of the top of the lower frame plate (3) are provided with first fixing plates (9). The left and right sides of the top of the lower frame plate (3) are provided with second fixing plates (10). The first fixing plate (9) and the second fixing plate (10) are movably connected. The bottom of the first fixing plate (9) and the bottom of the second fixing plate (10) are provided with sliding components (11).

2. The bipolar plate airtightness testing device according to claim 1, characterized in that: The sliding assembly (11) includes a slider (111) and a first groove (112). The slider (111) is fixedly connected to the bottom of the first fixed plate (9) and the bottom of the second fixed plate (10). The first groove (112) is opened on the front and left sides of the top of the lower frame plate (3) and is symmetrically arranged. The slider (111) is slidably connected to the first groove (112). A positioning mechanism (12) is provided on the outside of the slider (111).

3. The bipolar plate airtightness testing device according to claim 2, characterized in that: The positioning mechanism (12) includes a fixed block (121), a groove (122), a positioning groove (123), a positioning element (124), and a first spring (125). The fixed block (121) is fixedly connected to the outside of the slider (111). The grooves (122) are all opened on both sides of the fixed block (121). The first spring (125) is fixedly connected to the inside of the groove (122). The positioning element (124) is fixedly connected to the other end of the first spring (125). The positioning grooves (123) are all opened on both sides inside the first sliding groove (112). The positioning element (124) is movably connected to the positioning groove (123).

4. The bipolar plate airtightness testing device according to claim 3, characterized in that: The top of the fixing block (121) has through grooves (13) on both sides and is connected to the groove (122). The top of the positioning member (124) is fixedly connected to a fixing rod (14), and the fixing rod (14) is movably connected to the through groove (13).

5. The bipolar plate airtightness testing device according to claim 4, characterized in that: The top outer side of the fixed block (121) is provided with a second sliding groove (15), and the top of the fixed block (121) is provided with a U-shaped plate (16). The inner side of the U-shaped plate (16) is movably connected to the fixed rod (14), and the U-shaped plate (16) is slidably connected to the second sliding groove (15).

6. The bipolar plate airtightness testing device according to claim 5, characterized in that: A second spring (17) is fixedly connected to the outer side of the inner side of the second groove (15), and the other end of the second spring (17) is fixedly connected to the bottom of the outer side of the U-shaped plate (16).

7. The bipolar plate airtightness testing device according to claim 1, characterized in that: A sealing gasket (18) is fixedly connected to the inner side of the first fixing plate (9) and the inner side of the second fixing plate (10), and the sealing gasket (18) is movably connected to the upper mold (6) and the lower mold (7).

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