A cooler cover leak detection fixture

CN224659238UActive Publication Date: 2026-08-21CHONGQING BAIJI SIXING DIE CASTING
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Patent Information

Application Number
CN202522010513.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-18
Publication Date
2026-08-21
Estimated Expiration
2035-09-18

AI Technical Summary

Technical Problem

[0004]针对现有技术中存在的上述不足之处,本实用新型提供了一种冷却器盖检漏夹具,用以解决现有的冷却器盖表面异形孔较多,为了封堵冷却器盖表面的异形孔,检漏夹具需要设置多组密封座,将冷却器盖放入检漏夹具的过程中容易与密封座发生磕碰导致冷却器盖表面损伤,且冷却器盖较为沉重,进一步加大了工作人员放置冷却器盖到检漏夹具中的难度,影响了整体检测效率的问题

Benefits of technology

[0018] Furthermore, a guide rod is fixedly installed between the base plate and the top plate, and the lifting plate is slidably connected to the guide rod, thereby improving the stability of the lifting plate during the lifting process.

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Abstract

The utility model relates to leak detection fixture technical field, concretely relates to a cooler cover leak detection fixture, including bottom plate, the even fixed mounting of bottom plate top surface has the support column, and the top surface fixed mounting of support column has the top plate, transport mechanism, transport mechanism fixed mounting is in the bottom plate top surface, and transport mechanism one end extends to the outside of bottom plate, lifting mechanism, lifting mechanism fixed mounting is on the top plate, first limit seat, first limit seat fixed mounting is in transport mechanism top surface, second limit seat, second limit seat fixed mounting is in the bottom plate top surface, limiting mechanism, limiting mechanism fixed mounting is in the lifting mechanism bottom surface, two third limit seats, third limit seat all fixed mounting are in the bottom plate top surface, the utility model discloses the cooler cover of convenient staff to place to the fixture inside, reduces the time needed for carrying the cooler cover, improves the detection efficiency.
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Description

Technical Field

[0001] This utility model relates to the field of leak detection fixture technology, specifically to a leak detection fixture for a cooler cover. Background Technology

[0002] The automotive cooling system is a crucial system for maintaining the engine within a suitable temperature range. Its core function is to absorb and dissipate heat through circulating coolant, ensuring the engine operates efficiently and stably. The radiator cap is a key component of the cooling system, primarily used to regulate cooling system pressure, control coolant temperature, and maintain system sealing.

[0003] To ensure the airtightness of the cooling system, the airtightness of the cooler cover needs to be tested. However, the existing cooler cover has many irregular holes on its surface. In order to seal the irregular holes on the surface of the cooler cover, the leak detection fixture needs to be equipped with multiple sets of sealing seats. During the process of placing the cooler cover into the leak detection fixture, it is easy to bump against the sealing seats, which can damage the surface of the cooler cover. In addition, the cooler cover is relatively heavy, which further increases the difficulty for the staff to place the cooler cover into the leak detection fixture and affects the overall testing efficiency. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides a cooler cover leak detection fixture. This fixture solves the problems of existing cooler covers having many irregular holes on their surface. In order to seal these irregular holes, the leak detection fixture needs to be equipped with multiple sets of sealing seats. During the process of placing the cooler cover into the leak detection fixture, it is easy for the cover to collide with the sealing seats, causing damage to the surface of the cooler cover. In addition, the cooler cover is relatively heavy, which further increases the difficulty for workers to place the cooler cover into the leak detection fixture and affects the overall detection efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A cooler cover leak detection fixture includes a base plate, on which support columns are uniformly fixedly mounted, and on which a top plate is fixedly mounted; a transport mechanism, fixedly mounted on the top surface of the base plate, with one end extending to the outside of the base plate; a lifting mechanism, fixedly mounted on the top plate; a first limiting seat, fixedly mounted on the top surface of the transport mechanism; a second limiting seat, fixedly mounted on the top surface of the base plate; a limiting mechanism, fixedly mounted on the bottom surface of the lifting mechanism; and two third limiting seats, each fixedly mounted on the top surface of the base plate. The first limiting seat, the second limiting seat, the limiting mechanism, and the third limiting seats are all positioned directly opposite irregular holes on the surface of the cooler cover placed on the transport mechanism.

[0006] In this way, when the airtightness of the cooler cover needs to be tested, the transport mechanism is opened, one end of the transport mechanism moves the outer side of the base plate, and the staff can easily place the cooler cover on the transport mechanism. The transport mechanism is then opened again, and the transport mechanism moves the cooler cover back to the bottom of the top plate. Open the first limiting seat, which abuts against the cooler cover and blocks the irregular holes on the surface of the cooler cover. Open the second limiting seat, which is set directly opposite the first limiting seat. After the second limiting seat blocks the irregular holes on the surface of the cooler cover, it can clamp and limit the cooler cover in conjunction with the first limiting seat. Specifically, the first and second limiting seats together block the irregular holes on the transverse sides of the cooler cover. Open the third limiting seat, which is set on both sides of the transport mechanism. The two third limiting seats block the irregular holes on the longitudinal sides of the cooler cover. The lifting mechanism is activated, which drives the limiting mechanism to descend. After descending a certain distance, the limiting mechanism abuts against the cooler cover and seals the irregular hole on the top surface of the cooler cover. This structure makes it easier for workers to place the cooler cover into the fixture, reducing the time required to move the cooler cover. At the same time, the cooler cover is sealed and clamped in stages, reducing the possibility of collision between the cooler cover and the sealing seat, thereby reducing the possibility of affecting the overall inspection.

[0007] Furthermore, the transport mechanism includes guide rails symmetrically fixedly installed on the top surface of the base plate, the ends of the guide rails extending to the outer side of the base plate, sliders slidably installed on the top surface of each guide rail, sliding plates fixedly installed on the top surface of each slider, connecting plates fixedly installed on the side of each sliding plate, and connecting plates capable of connecting to a lead screw motor; a positioning plate fixedly installed on the top surface of the connecting plate, and positioning posts evenly installed on the top surface of the positioning plate.

[0008] In this way, when the cooler cover needs to be inspected, the lead screw motor connected to the connecting plate is turned on, which drives the sliding plate to move along the guide rail toward the outside of the base plate. After moving a certain distance, the connecting plate is located on the outside of the base plate, which makes it easier for the staff to place the cooler cover. Align the bottom of the cooler cover with the positioning post. The positioning post can block the irregular hole on the bottom of the cooler cover. After the cooler cover is placed, turn on the lead screw motor connected to the connecting plate again to drive the sliding plate to move along the guide rail toward the bottom plate. After moving a certain distance, the connecting plate is located directly below the top plate. This structure makes it easier for the staff to place the cooler cover, reduces the impact of the internal space limitation of the fixture on the placement of the cooler cover, and improves the testing efficiency.

[0009] Furthermore, the first limiting seat includes a first fixing plate fixedly installed on the top surface of the sliding plate, a first cylinder fixedly installed on the side of the first fixing plate, and a first sealing seat fixedly installed at the output end of the first cylinder. The first sealing seat is axially arranged facing the guide rail, thereby blocking the irregular hole on the transverse end face of the cooler cover and limiting the cooler cover.

[0010] Furthermore, the second limiting seat includes a second fixing plate fixedly installed on the top surface of the base plate, a second cylinder fixedly installed on the side of the second fixing plate, and a second sealing seat fixedly installed at the output end of the second cylinder, thereby blocking the irregular hole on the transverse end face of the cooler cover and limiting the cooler cover.

[0011] Furthermore, the lifting mechanism includes a lifting cylinder fixedly installed on the top surface of the top plate. The output end of the lifting cylinder passes through the top plate and is fixedly connected to a lifting plate. Guide rods are evenly fixedly installed on the top surface of the lifting plate. The guide rods are slidably connected to the top plate, thereby driving the limiting mechanism to rise and fall. The height of the limiting mechanism can be adjusted in real time according to the specifications of the cooler cover, thereby improving the accuracy of the limiting mechanism in sealing irregular holes.

[0012] Furthermore, the limiting mechanism includes multiple support rods fixedly installed on the bottom surface of the lifting plate. A sliding sleeve is fixedly installed at the bottom of the support rod. A connecting rod is slidably connected inside the sliding sleeve. A limiting rod is fixedly connected at the bottom of the connecting rod. An oblong hole is opened on the side of the sliding sleeve. An installation hole is opened on the side of the end of the connecting rod placed inside the sliding sleeve, which is directly opposite the oblong hole.

[0013] In this way, when the cooler cover needs to be inspected, the lifting cylinder is opened, which drives the lifting plate and support rod to descend. After descending a certain distance, the limit rod abuts against the cooler cover, and the end of the connecting rod slides into the slide sleeve along the sliding groove inside the slide sleeve. After the limiting rod abuts against the cooler cover, a pin is attached to the outside of the mounting hole. The distance the pin moves within the oblong hole is increased to observe the contact between the limiting rod and the cooler cover. This structure can seal the round hole on the top surface of the cooler cover and allow for real-time observation of the sealing status, reducing the possibility of excessive local pressure.

[0014] Furthermore, the third limiting seat includes a third fixing plate fixedly installed on the top surface of the base plate, a third cylinder fixedly installed on the side of the third fixing plate, and a third sealing seat fixedly installed at the output end of the third cylinder.

[0015] In this way, after the first and second limiting seats complete the limiting of the cooler cover, the third cylinder is opened, which drives the third sealing seat to move toward the cooler cover. After moving a certain distance, the third sealing seat can block the irregular holes on both sides of the longitudinal direction of the cooler cover. Together with the first and second limiting seats, it completes the clamping of the cooler cover. With this structure, the irregular holes on both sides of the longitudinal direction of the cooler cover can be blocked, improving the stability of the cooler cover during the testing process.

[0016] Furthermore, the lifting plate is fixedly installed with multiple fixing rods, and a fourth sealing seat is fixedly connected to the bottom surface of the fixing rods, thereby sealing the irregular hole on the top surface of the cooler cover.

[0017] Furthermore, a wear-resistant block is fixedly installed at the end of the limiting rod, which can reduce wear during the contact between the limiting rod and the cooler cover, and at the same time reduce the possibility of the limiting rod scratching the surface of the cooler cover.

[0018] Furthermore, a guide rod is fixedly installed between the base plate and the top plate, and the lifting plate is slidably connected to the guide rod, thereby improving the stability of the lifting plate during the lifting process. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment of a cooler cover leak detection fixture of the present invention (with a cooler cover placed on it). Figure 2 This is a right-side structural schematic diagram of an embodiment of a cooler cover leak detection fixture of the present invention; Figure 3 This is a cross-sectional structural schematic diagram of an embodiment of a cooler cover leak detection fixture of the present invention; Figure 4 for Figure 3 A magnified schematic diagram of the partial structure at point A in the middle; Figure 5 This is a cross-sectional structural schematic diagram of an embodiment of a cooler cover leak detection fixture of the present invention; Figure 6 This is a three-dimensional structural diagram (another view) of an embodiment of a cooler cover leak detection fixture of the present invention. Reference numerals in the accompanying drawings: Base plate 1, support column 101, top plate 102; 2. Transport mechanism; 201. Guide rail; 202. Slider; 203. Sliding plate; 204. Connecting plate; 205. Positioning plate; 206. Positioning column; Lifting mechanism 3, lifting cylinder 301, lifting plate 302, guide rod 303, guide rod 304; First limiting seat 4, first fixing plate 401, first cylinder 402, first sealing seat 403; Second limiting seat 5, second fixing plate 501, second cylinder 502, second sealing seat 503; Limiting mechanism 6, support rod 601, sliding sleeve 602, connecting rod 603, limiting rod 604, waist-shaped hole 605, mounting hole 606, wear-resistant block 607; Third limiting seat 7, third fixing plate 701, third cylinder 702, third sealing seat 703; Fixed rod 801, fourth sealing seat 802. Detailed Implementation

[0020] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] Example: like Figures 1-6 As shown, a cooler cover leak detection fixture of this utility model includes a base plate 1, with support columns 101 uniformly fixedly installed on the top surface of the base plate 1, and a top plate 102 fixedly installed on the top surface of the support columns 101; a transport mechanism 2, which is fixedly installed on the top surface of the base plate 1, with one end of the transport mechanism 2 extending to the outside of the base plate 1; a lifting mechanism 3, which is fixedly installed on the top plate 102; a first limiting seat 4, which is fixedly installed on the top surface of the transport mechanism 2; a second limiting seat 5, which is fixedly installed on the top surface of the base plate 1; a limiting mechanism 6, which is fixedly installed on the bottom surface of the lifting mechanism 3; and two third limiting seats 7, which are both fixedly installed on the top surface of the base plate 1. The first limiting seat 4, the second limiting seat 5, the limiting mechanism 6, and the third limiting seats 7 are all positioned directly opposite the irregular holes on the surface of the cooler cover placed on the transport mechanism 2.

[0023] In this way, when the airtightness of the cooler cover needs to be tested, the transport mechanism 2 is opened, one end of the transport mechanism 2 moves the outer side of the base plate 1, and the staff can easily place the cooler cover on the transport mechanism 2. The transport mechanism 2 is opened again, and the transport mechanism 2 drives the cooler cover back to the bottom plate 102. Open the first limiting seat 4. The first limiting seat 4 abuts against the cooler cover and blocks the irregular hole on the surface of the cooler cover. Open the second limiting seat 5. The second limiting seat 5 is set directly opposite the first limiting seat 4. After the second limiting seat 5 blocks the irregular hole on the surface of the cooler cover, it can clamp and limit the cooler cover in conjunction with the first limiting seat 4. Specifically, the first limiting seat 4 and the second limiting seat 5 together block the irregular holes on the two transverse sides of the cooler cover. Open the third limiting seat 7. The third limiting seat 7 is set on both sides of the transport mechanism 2. The two third limiting seats 7 block the irregular holes on the two longitudinal sides of the cooler cover. The lifting mechanism 3 is activated, which drives the limiting mechanism 6 to descend. After descending a certain distance, the limiting mechanism 6 abuts against the cooler cover and seals the irregular hole on the top surface of the cooler cover. This structure makes it easier for workers to place the cooler cover into the fixture, reducing the time required to move the cooler cover. At the same time, the cooler cover is sealed and clamped in stages, reducing the possibility of collision between the cooler cover and the sealing seat, thereby reducing the possibility of affecting the overall inspection.

[0024] The transport mechanism 2 includes guide rails 201 symmetrically fixedly installed on the top surface of the base plate 1. The ends of the guide rails 201 extend to the outer side of the base plate 1. Slider 202 is slidably installed on the top surface of each guide rail 201. Sliding plate 203 is fixedly installed on the top surface of each slider 202. Connecting plate 204 is fixedly installed on the side of each sliding plate 203. Connecting plate 204 can be connected to a lead screw motor. Positioning plate 205 is fixedly installed on the top surface of connecting plate 204. Positioning posts 206 are evenly installed on the top surface of positioning plate 205.

[0025] In this way, when the cooler cover needs to be inspected, the lead screw motor connected to the connecting plate 204 is turned on, which drives the sliding plate 203 to move along the guide rail 201 toward the outside of the base plate 1. After moving a certain distance, the connecting plate 204 is located on the outside of the base plate 1, which makes it convenient for the staff to place the cooler cover. The bottom surface of the cooler cover is aligned with the positioning post 206. The positioning post 206 can block the irregular hole on the bottom surface of the cooler cover. After the cooler cover is placed, the lead screw motor connected to the connecting plate 204 is turned on again, which drives the sliding plate 203 to move along the guide rail 201 toward the base plate 1. After moving a certain distance, the connecting plate 204 is located directly below the top plate 102. This structure makes it easier for the staff to place the cooler cover, reduces the impact of the internal space limitation of the fixture on the placement of the cooler cover, and improves the testing efficiency.

[0026] The first limiting seat 4 includes a first fixing plate 401 fixedly installed on the top surface of the sliding plate 203. A first cylinder 402 is fixedly installed on the side of the first fixing plate 401. A first sealing seat 403 is fixedly installed at the output end of the first cylinder 402. The first sealing seat 403 is axially arranged facing the guide rail 201, thereby blocking the irregular hole on the transverse end face of the cooler cover and limiting the cooler cover.

[0027] The second limiting seat 5 includes a second fixing plate 501 fixedly installed on the top surface of the base plate 1. A second cylinder 502 is fixedly installed on the side of the second fixing plate 501. A second sealing seat 503 is fixedly installed at the output end of the second cylinder 502. This can block the irregular hole on the transverse end face of the cooler cover and limit the cooler cover.

[0028] The lifting mechanism 3 includes a lifting cylinder 301 fixedly installed on the top surface of the top plate 102. The output end of the lifting cylinder 301 passes through the top plate 102 and is fixedly connected to the lifting plate 302. Guide rods 303 are evenly fixedly installed on the top surface of the lifting plate 302. The guide rods 303 are slidably connected to the top plate 102, thereby driving the limiting mechanism 6 to rise and fall. The height of the limiting mechanism 6 is adjusted in real time according to the specifications of the cooler cover, thereby improving the accuracy of the limiting mechanism 6 in sealing irregular holes.

[0029] The limiting mechanism 6 includes multiple support rods 601 fixedly installed on the bottom surface of the lifting plate 302. A sliding sleeve 602 is fixedly installed on the bottom of the support rod 601. A connecting rod 603 is slidably connected inside the sliding sleeve 602. A limiting rod 604 is fixedly connected to the bottom of the connecting rod 603. An oblong hole 605 is opened on the side of the sliding sleeve 602. An installation hole 606 is opened on the side of the end of the connecting rod 603 that is placed inside the sliding sleeve 602, facing the oblong hole 605.

[0030] In this way, when the cooler cover needs to be inspected, the lifting cylinder 301 is opened, which drives the lifting plate 302 and the support rod 601 to descend. After descending a certain distance, the limit rod 604 abuts against the cooler cover, and the end of the connecting rod 603 slides into the sliding sleeve 602 along the sliding groove inside the sliding sleeve 602. After the limiting rod 604 abuts against the cooler cover, a pin is connected to the mounting hole 606. The distance the pin moves within the oblong hole 605 is increased to observe the contact between the limiting rod 604 and the cooler cover. With this structure, the round hole on the top surface of the cooler cover can be sealed, and the real-time situation of sealing the cooler cover can be observed, reducing the possibility of excessive local pressure.

[0031] The third limiting seat 7 includes a third fixing plate 701 fixedly installed on the top surface of the base plate 1, a third cylinder 702 fixedly installed on the side of the third fixing plate 701, and a third sealing seat 703 fixedly installed at the output end of the third cylinder 702.

[0032] In this way, after the first limiting seat 4 and the second limiting seat 5 complete the limiting of the cooler cover, the third cylinder 702 is opened, which drives the third sealing seat 703 to move toward the cooler cover. After moving a certain distance, the third sealing seat 703 can block the irregular holes on both sides of the longitudinal direction of the cooler cover, and cooperate with the first limiting seat 4 and the second limiting seat 5 to complete the clamping of the cooler cover. With this structure, the irregular holes on both sides of the longitudinal direction of the cooler cover can be blocked, improving the stability of the cooler cover during the inspection process.

[0033] The lifting plate 302 is fixedly installed with multiple fixing rods 801. The bottom surface of the fixing rods 801 is fixedly connected to a fourth sealing seat 802, which can block the irregular hole on the top surface of the cooler cover.

[0034] A wear-resistant block 607 is fixedly installed at the end of the limiting rod 604, which can reduce the wear of the limiting rod 604 during the contact process with the cooler cover, and at the same time reduce the possibility of the limiting rod 604 scratching the surface of the cooler cover.

[0035] A guide rod 304 is fixedly installed between the base plate 1 and the top plate 102, and the lifting plate 302 is slidably connected to the guide rod 304, thereby improving the stability of the lifting plate 302 during the lifting process.

[0036] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A leak detection fixture for a cooler cover, characterized in that, include: A base plate (1) is provided, and a support column (101) is uniformly fixedly installed on the top surface of the base plate (1), and a top plate (102) is fixedly installed on the top surface of the support column (101). The transport mechanism (2) is fixedly installed on the top surface of the base plate (1), and one end of the transport mechanism (2) extends to the outside of the base plate (1); A lifting mechanism (3) is fixedly installed on the top plate (102); The first limiting seat (4) is fixedly installed on the top surface of the transport mechanism (2); The second limiting seat (5) is fixedly installed on the top surface of the base plate (1); A limiting mechanism (6) is fixedly installed on the bottom surface of the lifting mechanism (3); Two third limiting seats (7) are fixedly installed on the top surface of the base plate (1); The first limiting seat (4), the second limiting seat (5), the limiting mechanism (6) and the third limiting seat (7) are all positioned opposite the irregular hole on the surface of the cooler cover placed on the transport mechanism (2).

2. The cooler cover leak detection fixture as described in claim 1, characterized in that: The transport mechanism (2) includes guide rails (201) symmetrically fixedly installed on the top surface of the base plate (1). The ends of the guide rails (201) extend to the outside of the base plate (1). Slider blocks (202) are slidably installed on the top surface of the guide rails (201). Sliding plates (203) are fixedly installed on the top surface of the sliders (202). Connecting plates (204) are fixedly installed on the side of the sliding plates (203). The connecting plates (204) can be connected to external lead screw motors. A positioning plate (205) is fixedly installed on the top surface of the connecting plate (204), and positioning posts (206) are evenly installed on the top surface of the positioning plate (205).

3. A cooler cover leak detection fixture as described in claim 2, characterized in that: The first limiting seat (4) includes a first fixing plate (401) fixedly installed on the top surface of the sliding plate (203), a first cylinder (402) fixedly installed on the side of the first fixing plate (401), a first sealing seat (403) fixedly installed at the output end of the first cylinder (402), and the first sealing seat (403) is axially arranged facing the guide rail (201).

4. A cooler cover leak detection fixture as described in claim 1, characterized in that: The second limiting seat (5) includes a second fixing plate (501) fixedly installed on the top surface of the base plate (1), a second cylinder (502) fixedly installed on the side of the second fixing plate (501), and a second sealing seat (503) fixedly installed at the output end of the second cylinder (502).

5. A leak detection fixture for a cooler cover as described in claim 1, characterized in that: The lifting mechanism (3) includes a lifting cylinder (301) fixedly installed on the top surface of the top plate (102). The output end of the lifting cylinder (301) passes through the top plate (102) and is fixedly connected to a lifting plate (302). Guide rods (303) are evenly fixedly installed on the top surface of the lifting plate (302). The guide rods (303) are slidably connected to the top plate (102).

6. A cooler cover leak detection fixture as described in claim 5, characterized in that: The limiting mechanism (6) includes multiple support rods (601) fixedly installed on the bottom surface of the lifting plate (302). A sliding sleeve (602) is fixedly installed at the bottom of the support rod (601). A connecting rod (603) is slidably connected inside the sliding sleeve (602). A limiting rod (604) is fixedly connected at the bottom of the connecting rod (603). A waist-shaped hole (605) is opened on the side of the sliding sleeve (602). An installation hole (606) is opened on the side of the connecting rod (603) placed inside the sliding sleeve (602) facing the waist-shaped hole (605).

7. A cooler cover leak detection fixture as described in claim 1, characterized in that: The third limiting seat (7) includes a third fixing plate (701) fixedly installed on the top surface of the base plate (1), a third cylinder (702) fixedly installed on the side of the third fixing plate (701), and a third sealing seat (703) fixedly installed at the output end of the third cylinder (702).

8. A cooler cover leak detection fixture as described in claim 6, characterized in that: The lifting plate (302) is fixedly installed with multiple fixing rods (801), and the bottom surface of the fixing rods (801) is fixedly connected to a fourth sealing seat (802).

9. A cooler cover leak detection fixture as described in claim 6, characterized in that: A wear-resistant block (607) is fixedly installed at the end of the limiting rod (604).

10. A cooler cover leak detection fixture as described in claim 5, characterized in that: A guide rod (304) is fixedly installed between the bottom plate (1) and the top plate (102), and the lifting plate (302) is slidably connected to the guide rod (304).