A direct cooling plate high pressure helium leak detection tool and detection method

Abstract

The present invention discloses a direct cooling plate high-pressure helium leak detection tool and detection method, which belongs to the field of water cooling plate detection technology. A direct cooling plate high-pressure helium leak detection tool, including a tool sleeve clamp, a card seat is provided at one end of the tool sleeve clamp, a leak detection valve block is provided at the other end of the tool sleeve clamp, a push rod is provided on one side of the leak detection valve block, and guide rods are provided on both sides of the push rod, wherein the guide rod and the push rod are connected to the leak detection valve block through internal threads. In order to solve the problem that the detection pressure of the direct cooling plate is usually 2MPa-3Mpa, while the detection pressure of the conventional liquid cooling plate is 0.2-0.35Mpa, so the conventional inspection tool design method can no longer meet the problem of such a large helium detection pressure, the sealing device is driven by the pressure clamp device, and rapid assembly is realized, the inspection efficiency of the production line is improved, and the workload of the front-line employees is reduced. In addition, the screw thread of the direct cooling plate joint structure will not be damaged due to the high-pressure inspection process, and the material used also ensures that the appearance of the product will not be worn.

Description

Technical Field

[0001] The invention relates to the technical field of water cooling plate detection, and in particular to a direct cooling plate high-pressure helium leak detection tool and a detection method. Background Art

[0002] The direct cooling method uses refrigerant as the heat exchange medium. The refrigerant pump absorbs a large amount of heat during the vapor-liquid phase change process. Compared with the liquid cooling system that uses coolant for cooling, the heat dissipation efficiency is 3-4 times that of the latter. It can take away the heat inside the battery system more quickly. The direct cooling system has the advantages of compact system, light weight and good performance, and is the future development trend of liquid cooling plate structure.

[0003] However, the technology of direct cooling with refrigerant will also have application difficulties. Refrigerant is a two-phase fluid, and the development difficulty of direct cooling is greater than that of liquid cooling, mainly in the design of the cold plate and strategic control. In addition, there is a lack of testing and sealing means. The shape of the direct cooling plate joint is more complicated than that of the conventional cold plate joint. Usually, the detection pressure of the direct cooling plate is 2MPa-3Mpa, while the detection pressure of the conventional liquid cooling plate is 0.2-0.35Mpa. Therefore, the conventional inspection tooling design method can no longer meet such a large helium detection pressure. Summary of the invention

[0004] The purpose of the present invention is to provide a direct cooling plate high-pressure helium leak detection tool and detection method, in which the sealing device is driven by a pressure clamp device to achieve rapid assembly, improve the inspection efficiency of the production line, reduce the workload of front-line employees, and the screw threads of the direct cooling plate joint structure will not be damaged due to the high-pressure inspection process. The material used also ensures that the appearance of the product will not be worn, which can solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a direct cooling plate high-pressure helium leak detection tool, comprising a tool clamp, one end of the tool clamp is provided with a clamping seat, the other end of the tool clamp is provided with a leak detection valve block, one side of the leak detection valve block is provided with a push rod, and both sides of the push rod are provided with guide rods, wherein the guide rod and the push rod are connected to the leak detection valve block through internal threads, a retaining spring is provided between the push rod and the leak detection valve block, and the retaining spring is connected to the leak detection valve block through bolts, and the tool clamp is vertically downwardly installed on the joint of the water-cooled plate through the contoured fixing block so that it fits the joint, and then the pressure clamp rod is manually rotated, and the pressure clamp moves forward to drive the leak detection valve block to press against the output and input ports of the water-cooled plate. After the detection is completed, the pressure clamp rod is rotated in the opposite direction, and the pressure clamp carries the leak detection valve block backward away from the water-cooled plate interface to realize the rapid assembly of the high-pressure helium detection tool.

[0006] Furthermore, a transfer shaft is provided at one end of the push rod, and the transfer shaft and the push rod are connected by an internal thread, and a chain lock is provided on the outer side of the transfer shaft, and the chain lock is rotatably connected to the transfer shaft, and a pressure clamp is provided on the outer side of the chain lock, and the pressure clamp is rotatably connected to the chain lock. The push rod is clamped by a guide sleeve and a tooling sleeve, and the screw threads on the water-cooled plate joint are protected by a quick locking method of the pressure clamp to prevent damage during high-pressure testing. At the same time, the quick pressure clamp and the sealing device are fixedly connected by a retaining spring, which ensures structural stability while facilitating subsequent maintenance and replacement. The quick pressure clamp is guided by a guide rod and the push rod 4 to ensure the stability of the tooling clamping.

[0007] Furthermore, a pad is provided between the holder and the tooling sleeve, the pad is connected to the tooling sleeve by bolts, two positioning grooves are provided on the outer surface of the holder, an integrally formed positioning block is provided between the positioning grooves, a coupling shaft is provided at the bottom of the positioning block, a suitable sealing caliber is selected for the input gas port according to the compression rate, hardness and other parameters of the sealing ring, and a suitable sealing ring is selected for the sealing plug according to the product aperture, thereby ensuring the sealing of the high-pressure helium tooling, and abandoning the traditional helium detection joint locking method by screws.

[0008] Furthermore, a sealing plug is provided on one side of the outer surface of the leak detection valve block, and an input air port is provided on the other side of the outer surface of the leak detection valve block. The leak detection valve block is connected to the positioning block through a slot, and a quick-plug interface is provided on one side of the leak detection valve block, wherein the quick-plug interface and the input air port are interconnected, and the sealing plug is combined and connected with the leak detection valve block.

[0009] Furthermore, an air flow channel is provided inside the leak detection valve block, an air vent is provided on the outer surface of the sealing plug, an air plug is provided on the inner side of the air vent, the air plug is slidably connected to the air vent, and a plug sealing ring is provided on the outer surface of the sealing plug. Helium is injected into the interior of the water-cooled plate from the air input port through the quick-insert interface. As the pressure inside the water-cooled plate increases, the helium will act on the surface of the sealing plug at the other end.

[0010] Furthermore, a push chamber is provided inside the air input port, and a telescopic shaft channel is provided at one end of the push chamber, wherein the air flow channel extends to the inside of the push chamber.

[0011] Furthermore, a valve plug is provided inside the push chamber, and the valve plug is fitted with the push chamber. An air port sealing ring is provided on the outer side of one end of the valve plug, and an integrally formed connecting rod is provided on the other end of the valve plug. The air plug inside the air vent is pushed to move by air pressure, and the air plug pushes the air flow into the push chamber through the air flow channel during the movement. At this time, the internal pressure of the push chamber increases, and the valve plug is pushed out and combined with the water cooling plate joint with the help of pressure. At this time, the valve plug blocks the air inlet of the water cooling plate and stops the air supply operation.

[0012] Furthermore, the connecting rod is located inside the telescopic shaft, a traction spring is provided between the connecting rod and the valve plug, and the connecting rod is slidably connected to the telescopic shaft via the traction spring.

[0013] A detection method for a direct cooling plate high-pressure helium leak detection tool comprises the following steps:

[0014] Step 1: Install the tooling clamp vertically downward on the joint of the water-cooling plate through the contoured fixing block to make it fit the joint, then manually rotate the clamp rod, and the clamp moves forward to drive the leak detection valve block to press against the output and input ports of the water-cooling plate;

[0015] Step 2: After the sealing plug and the air inlet are connected to the water cooling plate joint, the quick-plug interface is connected to the air tightness detection equipment, and helium is injected into the water cooling plate from the air inlet through the quick-plug interface;

[0016] Step 3: As the pressure inside the water-cooled plate increases, helium will act on the surface of the sealing plug at the other end, and use the pressure to push the valve plug out to combine with the water-cooled plate joint. The valve plug will block the air inlet of the water-cooled plate and stop the gas supply operation. At this time, the pressure inside the water-cooled plate is constant, and then the pressure sensor element at the sealing plug is used to detect whether the pressure inside the plate has changed.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention installs the tooling clamp on the joint of the water-cooled plate vertically downward through the contoured fixing block to make it fit with the joint, and then manually rotates the clamp rod, the clamp moves forward to drive the leak detection valve block to press against the output and input ports of the water-cooled plate, and after the detection is completed, the clamp rod is rotated in the opposite direction, and the clamp moves backward with the leak detection valve block away from the water-cooled plate interface to achieve rapid assembly of the high-pressure helium detection tooling, the sealing plug cooperates with the input gas port to seal, and the clamp device drives the sealing device, so that rapid assembly is achieved, the inspection efficiency of the production line is improved, and the workload of front-line employees is reduced, and the screw thread of the direct cold plate joint structure will not be damaged due to the high-pressure inspection process, and the material used also ensures that the appearance of the product will not be worn;

[0019] 2. In the present invention, helium is injected into the interior of the water-cooled plate from the air input port through the quick-plug interface. As the pressure inside the water-cooled plate increases, the helium will act on the surface of the sealing plug at the other end, and push the air plug inside the vent to move through the air pressure. During the movement, the air plug will push the airflow into the push chamber through the airflow channel. At this time, the pressure inside the push chamber increases, and the valve plug is pushed out with the help of pressure to combine with the water-cooled plate joint. At this time, the valve plug will block the air inlet of the water-cooled plate and stop the air supply operation. At this time, the pressure inside the water-cooled plate is constant, and then the pressure sensor element at the sealing plug is used to detect whether the pressure inside the plate has changed. In this way, pressure fluctuations during the air supply detection process can be avoided, which leads to errors in the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall front view of the present invention;

[0021] Figure 2 It is an overall side view of the present invention;

[0022] Figure 3 It is a schematic diagram of the overall extended structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the leak detection valve block of the present invention;

[0024] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at point A;

[0025] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at B.

[0026] In the figure: 1. tooling clamp; 2. holder; 3. leak detection valve block; 4. pressure clamp; 201. gasket; 202. positioning groove; 203. positioning block; 204. combined shaft; 301. sealing plug; 302. air input port; 303. quick-connect interface; 304. air flow channel; 3011. plug sealing ring; 3012. air vent; 3013. air plug; 3021. push chamber; 3022. valve plug; 3023. air port sealing ring; 3024. traction spring; 3025. telescopic shaft; 3026. connecting rod; 401. chain lock; 402. push rod; 403. adapter shaft; 404. guide rod; 405. guide sleeve; 4021. retaining spring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to solve the problem that the normal direct cooling plate detection pressure is 2MPa-3Mpa, while the conventional liquid cooling plate detection pressure is 0.2-0.35Mpa, the conventional inspection tooling design method can no longer meet such a large helium detection pressure; please refer to Figure 1-6 , this embodiment provides the following technical solutions:

[0029] Embodiment 1:

[0030] A direct cooling plate high-pressure helium leak detection tool, comprising a tool clamp 1, a clamp seat 2 is arranged at one end of the tool clamp 1, a leak detection valve block 3 is arranged at the other end of the tool clamp 1, a push rod 402 is arranged on one side of the leak detection valve block 3, and guide rods 404 are arranged on both sides of the push rod 402, wherein the guide rod 404 and the push rod 402 are connected to the leak detection valve block 3 through internal threads, and a retaining spring 404 is arranged between the push rod 402 and the leak detection valve block 3. 21, the retaining ring 4021 is connected to the leak detection valve block 3 by bolts, a transfer shaft 403 is provided at one end of the push rod 402, the transfer shaft 403 is connected to the push rod 402 by internal threads, a chain lock 401 is provided on the outside of the transfer shaft 403, the chain lock 401 is rotatably connected to the transfer shaft 403, a pressure clamp 4 is provided on the outside of the chain lock 401, the pressure clamp 4 is rotatably connected to the chain lock 401, and the push rod 402 is connected to the tooling sleeve 1 through a guide sleeve 405;

[0031] The tooling clamp 1 is installed vertically downward on the joint of the water-cooled plate through the contoured fixing block to make it fit with the joint, and then the pressure clamp 4 rod is manually rotated, and the pressure clamp 4 moves forward to drive the leak detection valve block 3 to press against the output and input ports of the water-cooled plate. After the detection is completed, the pressure clamp 4 rod is rotated in the opposite direction, and the pressure clamp 4 moves backward with the leak detection valve block 3 away from the water-cooled plate interface to achieve rapid assembly of the high-pressure helium detection tooling. The sealing plug 301 is sealed with the input gas port 302. Compared with the previous screw thread locking form, the assembly will be faster, which ensures the sealing performance and greatly improves the detection efficiency, and the workload of the operator is greatly reduced;

[0032] Embodiment 2:

[0033] Traditional water-cooled plate joints are mostly threaded structures, which require repeated screwing operations during the inspection process, which can easily cause wear on the threads;

[0034] See also Figure 1-2 A backing plate 201 is provided between the card seat 2 and the tooling sleeve clamp 1, and the backing plate 201 is connected to the tooling sleeve clamp 1 by bolts. Two positioning grooves 202 are provided on the outer surface of the card seat 2, and an integrally formed positioning block 203 is provided between the positioning grooves 202. A coupling shaft 204 is provided at the bottom of the positioning block 203. A sealing plug 301 is provided on one side of the outer surface of the leak detection valve block 3, and an input air port 302 is provided on the other side of the outer surface of the leak detection valve block 3. The leak detection valve block 3 is connected to the positioning block 203 through a card slot, and a quick-plug interface 303 is provided on one side of the leak detection valve block 3, wherein the quick-plug interface 303 and the input air port 302 are mutually connected, and the sealing plug 301 is combined and connected with the leak detection valve block 3;

[0035] The input gas port 302 selects a suitable sealing caliber according to the compression rate, hardness and other parameters of the sealing ring, and the sealing plug 301 selects a suitable sealing ring according to the product aperture, thereby ensuring the sealing of the high-pressure helium tooling, abandoning the traditional helium detection joint locking method of screws, and using the pressure clamp 4 to quickly lock the thread on the water-cooled plate joint to prevent damage during the high-pressure detection process;

[0036] At the same time, the quick pressing clamp 4 and the sealing device are fixedly connected by a retaining spring 4021, which ensures the stability of the structure and is convenient for later maintenance and replacement; the quick pressing clamp 4 is guided by a guide rod 404 and a push rod 402 to ensure the stability of the tooling clamping;

[0037] The pressure inside the water cooling plate will fluctuate during the air supply process of the air input port 302, and the detection result is not accurate enough at this time;

[0038] Embodiment 3:

[0039] See also Figure 4-6 The leak detection valve block 3 is provided with an air passage 304 inside, a vent hole 3012 is provided on the outer surface of the sealing plug 301, an air plug 3013 is provided inside the vent hole 3012, the air plug 3013 is slidably connected with the vent hole 3012, a plug seal ring 3011 is provided on the outer surface of the sealing plug 301, a push chamber 3021 is provided inside the air inlet 302, and a telescopic shaft 3025 is provided at one end of the push chamber 3021, wherein the air passage 304 extends to the push chamber 3021. Inside, a valve plug 3022 is arranged inside the push cavity 3021, and the valve plug 3022 is fitted with the push cavity 3021. An air port seal ring 3023 is arranged on the outer side of one end of the valve plug 3022, and an integrally formed connecting rod 3026 is arranged on the other end of the valve plug 3022. The connecting rod 3026 is located inside the telescopic shaft 3025, and a traction spring 3024 is arranged between the connecting rod 3026 and the valve plug 3022. The connecting rod 3026 is slidably connected with the telescopic shaft 3025 through the traction spring 3024;

[0040] After the sealing plug 301 and the air input port 302 are connected to the water-cooled plate joint, the quick-insert interface 303 is connected to the airtightness detection equipment, and helium is injected into the water-cooled plate from the air input port 302 through the quick-insert interface 303. As the pressure inside the water-cooled plate increases, the helium will act on the surface of the sealing plug 301 at the other end, and push the air plug 3013 inside the air vent 3012 to move through the air pressure. During the movement, the air plug 3013 will push the air flow through the air flow channel 304 to the push chamber 3021. At this time, the pressure inside the push chamber 3021 increases, and the valve plug 3022 is pushed out by pressure to combine with the water-cooled plate joint. At this time, the valve plug 3022 will block the air inlet of the water-cooled plate and stop the air supply operation. At this time, the pressure inside the water-cooled plate is constant, and then the pressure sensor element at the sealing plug 301 is used to detect whether the pressure inside the plate has changed. This can avoid the pressure fluctuation during the air supply detection process, which leads to errors in the detection results.

[0041] Working principle: install the tooling clamp 1 vertically downward on the joint of the water-cooled plate through the contoured fixing block to make it fit with the joint, then manually rotate the pressure clamp 4 rod, the pressure clamp 4 moves forward to drive the leak detection valve block 3 to press the output and input ports of the water-cooled plate, and after the sealing plug 301 and the input air port 302 are connected to the water-cooled plate joint, connect the quick-plug interface 303 to the airtightness detection equipment, and inject helium from the input air port 302 into the water-cooled plate through the quick-plug interface 303. As the pressure inside the water-cooled plate increases, the helium will act on the surface of the sealing plug 301 at the other end, and push the air plug 3013 inside the vent 3012 to move through the air pressure. During the movement, the air plug 3013 will push the airflow through the air channel 304 to the push chamber 3021. At this time, the push chamber 302 1 The internal pressure increases, and the valve plug 3022 is pushed out and combined with the water-cooled plate joint by pressure. At this time, the valve plug 3022 will block the air inlet of the water-cooled plate and stop the air supply operation. At this time, the pressure inside the water-cooled plate is constant, and then the pressure sensor element at the sealing plug 301 detects whether the pressure inside the plate has changed. This can avoid the pressure fluctuations in the gas supply detection process, which leads to errors in the detection results. After the detection is completed, the pressure clamp 4 rod is rotated in the opposite direction, and the pressure clamp 4 moves backward with the leak detection valve block 3 away from the water-cooled plate interface to realize the rapid assembly of the high-pressure helium detection tooling. The sealing plug 301 is sealed with the input air port 302. Compared with the previous screw locking form, the assembly will be faster, ensuring the sealing performance while greatly improving the detection efficiency, and greatly reducing the workload of the operator.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A direct cooling plate high pressure helium leak detection tool, characterized in that: The tooling clamp (1) comprises a clamping seat (2) at one end of the tooling clamp (1), a leak detection valve block (3) at the other end of the tooling clamp (1), a push rod (402) at one side of the leak detection valve block (3), guide rods (404) at both sides of the push rod (402), wherein the guide rod (404) and the push rod (402) are connected to the leak detection valve block (3) via internal threads, a retaining spring (4021) is provided between the push rod (402) and the leak detection valve block (3), and the retaining spring (4021) is connected to the leak detection valve block (3) via bolts.

2. A direct cooling plate high pressure helium leak detection tool according to claim 1, characterized in that: A transfer shaft (403) is provided at one end of the push rod (402), and the transfer shaft (403) is connected to the push rod (402) via an internal thread; a chain lock (401) is provided on the outer side of the transfer shaft (403), and the chain lock (401) is rotatably connected to the transfer shaft (403); a pressure clamp (4) is provided on the outer side of the chain lock (401), and the pressure clamp (4) is rotatably connected to the chain lock (401); the push rod (402) is connected to the tooling sleeve (1) via a guide sleeve (405).

3. A direct cooling plate high pressure helium leak detection tool according to claim 1, characterized in that: A backing plate (201) is provided between the clamping seat (2) and the tooling sleeve (1), and the backing plate (201) and the tooling sleeve (1) are connected by bolts. Two positioning grooves (202) are provided on the outer surface of the clamping seat (2), and an integrally formed positioning block (203) is provided between the positioning grooves (202). A coupling shaft (204) is provided at the bottom of the positioning block (203).

4. A direct cooling plate high pressure helium leak detection tool according to claim 1, characterized in that: A sealing plug (301) is provided on one side of the outer surface of the leak detection valve block (3), and an air input port (302) is provided on the other side of the outer surface of the leak detection valve block (3). The leak detection valve block (3) is connected to the positioning block (203) via a slot, and a quick-insertion interface (303) is provided on one side of the leak detection valve block (3), wherein the quick-insertion interface (303) and the air input port (302) are interconnected, and the sealing plug (301) and the leak detection valve block (3) are combined and connected.

5. A direct cooling plate high pressure helium leak detection tool according to claim 4, characterized in that: The leak detection valve block (3) is provided with an air flow channel (304) inside, the outer surface of the sealing plug (301) is provided with an air vent (3012), the inner side of the air vent (3012) is provided with an air plug (3013), the air plug (3013) is slidably connected to the air vent (3012), and the outer surface of the sealing plug (301) is provided with a plug sealing ring (3011).

6. A direct cooling plate high pressure helium leak detection tool according to claim 5, characterized in that: A push chamber (3021) is disposed inside the air input port (302), and a telescopic shaft (3025) is disposed at one end of the push chamber (3021), wherein the air flow channel (304) extends to the inside of the push chamber (3021).

7. A direct cooling plate high pressure helium leak detection tool according to claim 6, characterized in that: A valve plug (3022) is arranged inside the push cavity (3021), and the valve plug (3022) is fitted with the push cavity (3021). An air port sealing ring (3023) is arranged on the outer side of one end of the valve plug (3022), and an integrally formed connecting rod (3026) is arranged at the other end of the valve plug (3022).

8. A direct cooling plate high pressure helium leak detection tool according to claim 7, characterized in that: The connecting rod (3026) is located inside the telescopic shaft (3025), and a traction spring (3024) is provided between the connecting rod (3026) and the valve plug (3022). The connecting rod (3026) is slidably connected to the telescopic shaft (3025) via the traction spring (3024).

9. A detection method for a direct cooling plate high pressure helium leak detection tool, based on the direct cooling plate high pressure helium leak detection tool according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: Install the tooling clamp (1) vertically downward on the joint of the water-cooling plate through the contoured fixing block, fit it with the joint, and then manually rotate the rod of the pressure clamp (4), so that the pressure clamp (4) moves forward and drives the leak detection valve block (3) to press against the output and input ports of the water-cooling plate; Step 2: After the sealing plug (301) and the gas input port (302) are connected to the water cooling plate joint, the quick-insertion interface (303) is connected to the airtightness detection equipment, and helium is injected into the interior of the water cooling plate from the gas input port (302) through the quick-insertion interface (303); Step 3: As the pressure inside the water-cooled plate increases, helium acts on the surface of the sealing plug (301) at the other end, and uses the pressure to push the valve plug (3022) out to combine with the water-cooled plate joint. The valve plug (3022) blocks the air inlet of the water-cooled plate and stops the air supply operation. At this time, the pressure inside the water-cooled plate is constant, and then the pressure sensor element at the sealing plug (301) is used to detect whether the pressure inside the plate has changed.

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