Helium detection tool capable of recycling helium

Abstract

The helium detection tool comprises a fixed base, a lifting pressing plate and a fixed top plate, the fixed top plate is fixedly installed above the fixed base, the fixed top plate and the fixed base are in butt joint and fixed through four lifting guide columns, and the lifting pressing plate is movably installed between the fixed top plate and the fixed base; the lifting pressing plate is movably connected to the outer surface of the lifting guide column in a sleeving mode, an airtight cover is fixedly installed in the middle of the lower end of the lifting pressing plate, a groove used in cooperation with the airtight cover is formed in the middle of the upper end of the fixed base, a sealing cavity is formed in the inner side of the lower end of the airtight cover, and an air inlet nozzle is arranged at the front end of the airtight cover. An air exhaust nozzle is fixedly mounted on the outer surface of one side of the airtight cover, and a pressure relief nozzle is fixedly mounted on the outer surface of the other side of the airtight cover; a helium recovery structure is arranged, so that the helium can be recycled, and the use consumption of the detected gas is reduced.

Description

Technical Field

[0001] The invention belongs to the field related to lithium battery top cover detection technology, and more specifically to a helium detection tool with recyclable helium. Background Art

[0002] This helium inspection tool is used to detect the air tightness of the cover plate pole and explosion-proof valve position. The working principle is based on pressure changes or gas flow to detect leaks. When a certain pressure of gas is filled into the object to be tested, if there is a leak in the object, the internal gas pressure will gradually decrease, or the external gas will enter the object to be tested through the leak point, resulting in changes in pressure or gas flow. By monitoring these changes, it can be determined whether the object to be tested has a leak.

[0003] The patent document with the announcement number CN117232739B records an automobile battery cover air tightness detection device, including a base body, the upper surface of which is provided with three equidistantly arranged movable grooves, each of which is fixedly installed with a main pneumatic telescopic rod; the detection mechanism is set up, the driving motor drives the connecting rod and the driving gear to rotate, so that the annular chain and the guide gear rotate, and the leakage detection U-shaped head moves along the edge of the automobile battery and the cover. If there is a leak somewhere in the edge of the automobile battery and the cover, when the leakage detection U-shaped head passes by, the metal block will be pushed by the gas to move to the inside of the leakage detection U-shaped head and squeeze the reset spring, so that the pigment control valve is energized to open

[0004] The above-mentioned equipment has certain deficiencies in the battery cover air tightness test operation. Conventional helium test fixtures generally do not recover the ejected helium, but blow it directly into the air. On the one hand, it affects the helium concentration in the air, and on the other hand, it is also a waste of materials. The cost of helium itself is relatively high, which increases the use cost during the air tightness test operation; at the same time, the above-mentioned equipment does not have an auxiliary positioning structure. When performing the battery cover air tightness test operation, the battery cover needs to be installed in the test tooling. Manual installation of the battery cover is prone to tilting, which makes it impossible to accurately dock the battery cover and the test tooling, which is prone to leakage and reduces its detection accuracy; secondly, the above-mentioned equipment does not have an auxiliary discharge structure. When performing the battery cover air tightness test operation, the battery cover will be stuck in the groove structure of the test tooling, and it needs to be manually removed after the test, which increases the difficulty of the battery cover material removal operation and has a single functionality. Summary of the invention

[0005] The purpose of the present invention is to provide a helium inspection tool with recoverable helium, which can solve the existing problems.

[0006] The problem to be solved by the present invention is:

[0007] 1. Conventional helium inspection fixtures generally do not recycle the ejected helium, but directly blow it into the air, which affects the helium concentration in the air and is also a waste of materials. The cost of helium itself is relatively high, which increases the cost of use during air tightness inspection operations;

[0008] 2. At the same time, the above equipment does not have an auxiliary positioning structure. When performing the battery cover airtightness test, the battery cover needs to be installed in the test fixture. Manual installation of the battery cover is prone to tilting, making it impossible to accurately dock the battery cover and the test fixture, which is prone to leakage and reduces its detection accuracy;

[0009] 3. Secondly, the above-mentioned equipment does not have an auxiliary discharge structure. When performing the battery cover airtightness test, the battery cover will be stuck in the groove structure of the test tooling. After the test, it needs to be manually removed, which increases the difficulty of the battery cover removal operation and has a single functionality.

[0010] The purpose of the present invention can be achieved through the following technical solutions:

[0011] A recyclable helium inspection tool comprises a fixed base, a lifting and lowering pressure plate and a fixed top plate, wherein the fixed top plate is fixedly installed above the fixed base, and the fixed top plate and the fixed base are butt-jointed and fixed by four lifting guide pillars, the lifting and lowering pressure plate is movably installed between the fixed top plate and the fixed base, and the lifting and lowering pressure plate is movably sleeved on the outer surfaces of the lifting guide pillars, an airtight cover is fixedly installed at the middle position of the lower end of the lifting and lowering pressure plate, a groove for cooperating with the airtight cover is provided at the middle position of the upper end of the fixed base, a sealing cavity is provided on the inner side of the lower end of the airtight cover, an air inlet nozzle is provided at the front end of the airtight cover, an exhaust nozzle is fixedly installed on the outer surface of one side of the airtight cover, a pressure relief nozzle is fixedly installed on the outer surface of the other side of the airtight cover, and a positioning piece for correcting the installation position of the battery top cover is installed on the outer side of the upper end of the fixed base.

[0012] As a further technical solution of the present invention, sealing rings are provided on the outer surface of the upper end of the fixed base and the outer surface of the lower end of the airtight cover. The outer surface of the upper end of the lifting and pressing plate is driven by a power cylinder. An exhaust nozzle is fixedly installed at the middle position of the lower end of the fixed base. During the detection operation, the battery top cover to be detected is placed on the upper end of the fixed base so that the groove of the fixed base is placed directly below the battery top cover. The lifting and pressing plate is driven by the power cylinder to drive the lifting and pressing plate to move the airtight cover downward so that the battery top cover is tightly pressed and fixed between the airtight cover and the fixed base. The sealing ring is set so that the airtight cover, the fixed base and the battery top cover are all kept in a sealed connection. The exhaust nozzle, the air inlet nozzle and the air extraction nozzle are independently controlled by a plurality of groups of solenoid valves. During the airtight detection, During operation, the pressure relief nozzle and the air extraction nozzle are closed, and the air inlet nozzle is opened. Helium is delivered into the sealed cavity of the airtight cover through the air inlet nozzle, and the airtightness of the battery top cover pole and the explosion-proof valve position is detected by helium. When the airtightness is insufficient, the helium in the sealed cavity passes through the leakage point of the battery top cover and is discharged downward, thereby entering the groove of the fixed base and being discharged by the exhaust nozzle. The exhaust nozzle is connected to the gas detection equipment to detect the leaked helium, and it is judged that the airtightness of the battery top cover is unqualified. When the airtightness test of the battery top cover passes, the air inlet nozzle and the pressure relief nozzle are closed, and the air extraction nozzle is opened to extract the helium in the sealed cavity. Secondly, the sealed cavity is in a negative pressure state, the air extraction nozzle is closed, and the pressure relief nozzle is opened. Air is introduced from the pressure relief nozzle on the right to break the air, thereby completing the helium recovery operation.

[0013] As a further technical solution of the present invention, the positioning member includes a fixed frame and four groups of cylinder bodies. The fixed frame is an overall rectangular frame structure. The four groups of cylinder bodies are all arranged in the middle of the side of the fixed frame. The telescopic ends of the cylinder bodies are provided with positioning strips. In order to avoid misalignment of the battery top cover during the airtightness detection and installation operation, the battery top cover is placed on the inner side of the fixed frame, and the four groups of cylinder bodies are driven at the same time, so that the four groups of positioning strips move at the same time, so that the four groups of positioning strips drive the battery top cover to be centered, so that the battery top cover and the airtight cover are aligned up and down.

[0014] As a further technical solution of the present invention, docking corner sleeves are provided at the four corners of the fixed frame, and the docking corner sleeves and the fixed frame are movably connected by a telescopic rod. The interior of the fixed frame is provided with a slot for cooperating with the telescopic rod. Through the setting of the telescopic rod, a telescopic adjustment structure is provided between the fixed frame and the docking corner sleeves, and the use size of the fixed frame can be arbitrarily adjusted, so that the positioning piece can be installed on fixed bases of different sizes for use.

[0015] As a further technical solution of the present invention, two groups of pads are fixedly installed on the inner side of the docking angle sleeve, and one end of the cylinder body and the fixed frame are docked and fixed through a connecting plate. The two groups of pads can increase the friction of the docking angle sleeve and clamp the docking angle sleeve at the four corners of the fixed base.

[0016] As a further technical solution of the present invention, two groups of lifters are installed in the groove of the fixed base, and a lifting top plate is movably installed on the upper end of the lifter. The lifter and the lifting top plate are elastically connected by a spring. By utilizing the arrangement of the two groups of lifters, after the battery top cover completes the airtightness test, when the airtight cover moves up, the spring is used to drive the lifting top plate to move up, so that the lifting top plate lifts the battery top cover from the bottom.

[0017] As a further technical solution of the present invention, a lifting block is movably installed between the lifter and the lifting top plate, fixed clips are movably installed on both sides of the lifter, and the lifter and the fixed clips are movably connected through a telescopic plate. A bolt body for locking the telescopic plate is provided on the side of the lifter. The position of the fixed clip can be arbitrarily adjusted by using the telescopic plate so that the fixed clip is stuck in the groove of the fixed base. The setting of two groups of fixed clips can meet the fixing operation of fixed bases with different structures.

[0018] As a further technical solution of the present invention, a push rod is movably installed in the middle of one end of the cylinder body, and the push rod and the positioning strip are connected by a screw rod. By rotating the screw rod, the screw rod can drive the positioning strip to move, thereby adjusting the use position of the positioning strip.

[0019] As a further technical solution of the present invention, two groups of power cylinders are arranged at the upper end of the fixed top plate, and the lifting and pressing plate and the fixed top plate are driven by the two groups of power cylinders in cooperation with the rod body. The power cylinder drives the rod body, so that the rod body drives the lifting and pressing plate to move up and down.

[0020] As a further technical solution of the present invention, the four corners of the lifting and pressing plate are provided with guide grooves used in conjunction with the lifting guide pillars, and rollers are installed on the inner sides of the guide grooves.

[0021] Beneficial effects of the present invention:

[0022] 1. By providing an airtight cover and a sealed cavity, when the recyclable helium inspection tool is used, it has a helium recovery structure, which can recycle the helium and reduce the consumption of the inspection gas;

[0023] During the inspection operation, the battery top cover to be inspected is placed on the upper end of the fixed base, so that the groove of the fixed base is placed directly below the battery top cover, and the lifting and lowering pressure plate is driven by the power cylinder to drive the lifting and lowering pressure plate to drive the airtight cover to move downward, so that the battery top cover is tightly pressed and fixed between the airtight cover and the fixed base. Through the setting of the sealing ring, the airtight cover, the fixed base and the battery top cover are all kept sealed and connected. The exhaust nozzle, the air inlet nozzle and the air extraction nozzle are independently controlled by several groups of solenoid valves. When performing the airtight inspection operation, the pressure relief nozzle and the air extraction nozzle are closed, and the air inlet nozzle is opened. Helium is transported into the sealed cavity of the airtight cover through the air inlet nozzle, and the battery top cover pole and the explosion-proof valve are inspected by helium. The air tightness of the position. When the air tightness is insufficient, the helium in the sealed cavity passes through the leakage point of the battery top cover and is discharged downward, thereby entering into the groove of the fixed base and being discharged by the exhaust nozzle. The exhaust nozzle is connected to the gas detection equipment to detect the leaked helium, and it is judged that the battery top cover is unqualified in air tightness. When the battery top cover air tightness test passes, the air inlet nozzle and the pressure relief nozzle are closed, and the exhaust nozzle is opened to extract the helium in the sealed cavity to complete the helium recovery operation. The helium is recovered into the container for reuse. Secondly, the sealed cavity is in a negative pressure state, the exhaust nozzle is closed, the pressure relief nozzle is opened, and air is introduced from the pressure relief nozzle on the right to break the air, thereby completing the pressure relief operation in the sealed cavity.

[0024] 2. By setting the positioning piece, the recyclable helium gas inspection tooling is provided with an installation positioning structure when it is used, so as to avoid the misalignment of the battery cover during installation and improve its detection accuracy;

[0025] When in use, in order to avoid the battery top cover from being misplaced during the airtightness detection and installation operation, the battery top cover is placed on the inner side of the fixed frame, and four groups of cylinder bodies are driven at the same time, so that the four groups of positioning clips move at the same time, so that the four groups of positioning clips drive the battery top cover to be centrally aligned, so that the battery top cover and the airtight cover are aligned up and down, and the battery top cover can be avoided from being misplaced when the battery top cover and the airtight cover are pressed together. Secondly, through the setting of the telescopic rod, a telescopic adjustment structure is provided between the fixed frame and the docking angle sleeve. When the fixed frame is pulled, the telescopic rod is pulled out of the fixed frame, and the docking angle sleeve is clamped at the four corners of the fixed base. The use size of the fixed frame can be adjusted arbitrarily, so that the positioning piece can be installed on fixed bases of different sizes for use.

[0026] 3. By setting a ejector, when the recyclable helium inspection tool is used, it has an ejection type discharge structure, making the battery cover plate taking operation more convenient and improving its inspection efficiency;

[0027] During operation, by using the setting of two sets of lifters, after the battery top cover completes the airtightness test, when the airtight cover moves up, the spring is used to drive the lifting top plate to move up, so that the lifting top plate lifts the battery top cover from the bottom, making it easier to remove the battery top cover. The position of the fixed clip can be adjusted arbitrarily by using the telescopic plate, so that the fixed clip is stuck in the groove of the fixed base. The setting of the two sets of fixed clips can meet the fixing operation of fixed bases with different structures, thereby improving the application range of the lifter. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the overall structure of a helium inspection tool with recoverable helium according to the present invention;

[0030] Figure 2 It is an overall structural diagram of a lifting and lowering pressure plate in a helium inspection tooling capable of recovering helium of the present invention;

[0031] Figure 3 This is an overall structural diagram of a positioning component in a helium inspection tooling capable of recovering helium according to the present invention;

[0032] Figure 4 It is a planar structural diagram of a positioning member in a helium inspection tooling capable of recovering helium of the present invention;

[0033] Figure 5 It is a planar structural diagram of a feeder in a helium inspection tooling capable of recovering helium according to the present invention;

[0034] Figure 6 The present invention discloses an overall structural diagram of a cylinder body in a helium inspection tool with recoverable helium.

[0035] In the figure: 1. Fixed base; 2. Lifting plate; 3. Airtight cover; 4. Exhaust nozzle; 5. Inlet nozzle; 6. Power cylinder; 7. Fixed top plate; 8. Exhaust nozzle; 9. Lifting guide column; 10. Pressure relief nozzle; 11. Sealed cavity; 12. Guide groove; 13. Positioning piece; 14. Sealing ring; 15. Ejector; 16. Fixed frame; 17. Cylinder body; 18. Positioning strip; 19. Docking angle sleeve; 20. Telescopic rod; 21. Pad; 22. Battery top cover; 23. Telescopic plate; 24. Lifting block; 25. Fixed strip; 26. Lifting top plate; 27. Spring; 28. Screw rod; 29. ​​Push rod; 30. Connecting plate. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0037] like Figure 1 As shown, a recyclable helium inspection tool comprises a fixed base 1, a lifting and lowering pressure plate 2 and a fixed top plate 7, the fixed top plate 7 is fixedly installed above the fixed base 1, and the fixed top plate 7 and the fixed base 1 are fixed by four lifting guide pillars 9, the lifting and lowering pressure plate 2 is movably installed between the fixed top plate 7 and the fixed base 1, and the lifting and lowering pressure plate 2 is movably sleeved on the outer surface of the lifting and lowering pressure plate 9, an airtight cover 3 is fixedly installed in the middle of the lower end of the lifting and lowering pressure plate 2, a groove for matching with the airtight cover 3 is provided in the middle of the upper end of the fixed base 1, a sealing cavity 11 is provided on the inner side of the lower end of the airtight cover 3, an air inlet nozzle 5 is provided at the front end of the airtight cover 3, an exhaust nozzle 8 is fixedly installed on the outer surface of one side of the airtight cover 3, a pressure relief nozzle 10 is fixedly installed on the outer surface of the other side of the airtight cover 3, and a positioning member 13 for correcting the installation position of the battery top cover 22 is installed on the outer side of the upper end of the fixed base 1.

[0038] To solve the helium recovery problem, such as Figure 2 As shown, the upper outer surface of the fixed base 1 and the lower outer surface of the airtight cover 3 are both provided with a sealing ring 14, the upper outer surface of the lifting and pressing plate 2 is driven by the power cylinder 6, and the exhaust nozzle 4 is fixedly installed at the middle position of the lower end of the fixed base 1. During the detection operation, the battery top cover 22 to be detected is placed on the upper end of the fixed base 1, so that the groove of the fixed base 1 is placed directly below the battery top cover 22, and the lifting and pressing plate 2 is driven by the power cylinder 6 to drive the lifting and pressing plate 2 to drive the airtight cover 3 to move downward, so that the battery top cover 22 is tightly pressed and fixed between the airtight cover 3 and the fixed base 1. Through the setting of the sealing ring 14, the airtight cover 3, the fixed base 1 and the battery top cover 22 are all kept sealed and connected, and the exhaust nozzle 4, the air inlet nozzle 5 and the air extraction nozzle 8 are independently controlled by a plurality of groups of solenoid valves. When performing the airtight detection operation, the pressure relief nozzle 10 and The exhaust nozzle 8 is closed, and the air inlet nozzle 5 is opened. Helium is transported into the sealed cavity 11 of the airtight cover 3 through the air inlet nozzle 5. The airtightness of the pole and the explosion-proof valve position of the battery top cover 22 is detected by helium. When the airtightness is insufficient, the helium in the sealed cavity 11 passes through the leakage point of the battery top cover 22 and is discharged downward, thereby entering the groove of the fixed base 1 and being discharged by the exhaust nozzle 4. The exhaust nozzle 4 is connected to the gas detection equipment to detect the leaked helium, and it is determined that the airtightness of the battery top cover 22 is unqualified. When the airtightness test of the battery top cover 22 passes, the air inlet nozzle 5 and the pressure relief nozzle 10 are closed, and the exhaust nozzle 8 is opened to extract the helium in the sealed cavity 11. Secondly, the sealed cavity 11 is in a negative pressure state, the exhaust nozzle 8 is closed, and the pressure relief nozzle 10 is opened. Air is introduced from the pressure relief nozzle 10 on the right side to break the air, thereby completing the helium recovery operation.

[0039] To solve the positioning problem during material installation, such as Figure 3As shown, the positioning member 13 includes a fixed frame 16 and four groups of cylinder bodies 17. The fixed frame 16 is an overall rectangular frame structure. The four groups of cylinder bodies 17 are all arranged in the middle of the side of the fixed frame 16. The telescopic end of the cylinder body 17 is provided with a positioning clip 18. In order to avoid the battery top cover 22 from being misaligned during the airtightness detection and installation operation, the battery top cover 22 is placed on the inner side of the fixed frame 16, and the four groups of cylinder bodies 17 are driven at the same time, so that the four groups of positioning clips 18 move at the same time, so that the four groups of positioning clips 18 drive the battery top cover 22 to be aligned in the center, so that the battery top cover 22 and the airtight cover 3 are aligned up and down.

[0040] like Figure 4 As shown, docking corner sleeves 19 are provided at the four corners of the fixed frame 16, and the docking corner sleeves 19 and the fixed frame 16 are movably connected through a telescopic rod 20. The interior of the fixed frame 16 is provided with a slot for matching the telescopic rod 20. Through the setting of the telescopic rod 20, a telescopic adjustment structure is provided between the fixed frame 16 and the docking corner sleeves 19, and the use size of the fixed frame 16 can be arbitrarily adjusted, so that the positioning member 13 can be installed on fixed bases 1 of different sizes for use.

[0041] Two sets of pads 21 are fixedly installed on the inner side of the docking angle sleeve 19. One end of the cylinder body 17 and the fixed frame 16 are docked and fixed through a connecting plate 30. The two sets of pads 21 can increase the friction of the docking angle sleeve 19 and clamp the docking angle sleeve 19 at the four corners of the fixed base 1.

[0042] Two sets of ejectors 15 are installed in the groove of the fixed base 1 to solve the problem of removing the material. Figure 5 As shown, a lifting top plate 26 is movably installed on the upper end of the lifter 15, and the lifter 15 and the lifting top plate 26 are elastically connected by a spring 27. By setting up two groups of lifters 15, after the battery top cover 22 completes the airtightness test, when the airtight cover 3 moves up, the spring 27 can be used to drive the lifting top plate 26 to move up, so that the lifting top plate 26 lifts the battery top cover 22 from the bottom.

[0043] like Figure 5 As shown, a lifting block 24 is movably installed between the ejector 15 and the lifting top plate 26, and fixed clips 25 are movably installed on both sides of the ejector 15. The ejector 15 and the fixed clips 25 are movably connected through a telescopic plate 23. A bolt body for locking the telescopic plate 23 is provided on the side of the ejector 15. The position of the fixed clip 25 can be arbitrarily adjusted by using the telescopic plate 23, so that the fixed clip 25 is stuck in the groove of the fixed base 1, and the setting of two groups of fixed clips 25 can meet the fixing operation of fixed bases 1 with different structures.

[0044] like Figure 6As shown, a push rod 29 is movably installed in the middle of one end of the cylinder body 17, and the push rod 29 and the positioning clip 18 are connected by a screw rod 28. By rotating the screw rod 28, the screw rod 28 can drive the positioning clip 18 to move, thereby adjusting the use position of the positioning clip 18.

[0045] Two groups of power cylinders 6 are arranged at the upper end of the fixed top plate 7. The lifting and pressing plate 2 and the fixed top plate 7 are driven by the two groups of power cylinders 6 in cooperation with the rod body. The power cylinder 6 drives the rod body, so that the rod body drives the lifting and pressing plate 2 to move up and down.

[0046] The four corners of the lifting plate 2 are all provided with guide grooves 12 used in conjunction with the lifting guide pillars 9 , and rollers are installed inside the guide grooves 12 .

[0047] When in use, conventional helium inspection fixtures generally do not recover the ejected helium, but blow it directly into the air, which affects the helium concentration in the air and is also a waste of materials. The cost of helium itself is relatively high, which increases the cost of use during air tightness inspection operations.

[0048] To this end, by providing an airtight cover 3 and a sealed cavity 11, when the recyclable helium helium inspection tool is used, it has a helium recovery structure, which can recycle the helium and reduce the consumption of the inspection gas;

[0049] During the detection operation, the battery top cover 22 to be detected is placed on the upper end of the fixed base 1, so that the groove of the fixed base 1 is placed directly below the battery top cover 22, and the lifting and lowering pressure plate 2 is driven by the power cylinder 6, so that the lifting and lowering pressure plate 2 drives the airtight cover 3 to move downward, so that the battery top cover 22 is tightly pressed and fixed between the airtight cover 3 and the fixed base 1, and the sealing ring 14 is set to ensure that the airtight cover 3, the fixed base 1 and the battery top cover 22 are sealed and connected, and the exhaust nozzle 4, the air inlet nozzle 5 and the air extraction nozzle 8 are independently controlled by a plurality of groups of solenoid valves. When performing the airtight detection operation, the pressure relief nozzle 10 and the air extraction nozzle 8 are closed, and the air inlet nozzle 5 is opened, and helium is delivered into the sealed cavity 11 of the airtight cover 3 through the air inlet nozzle 5, and the battery top cover 22 pole and The air tightness of the explosion-proof valve position, when the air tightness is insufficient, the helium in the sealed cavity 11 passes through the leakage point of the battery top cover 22 and is discharged downward, thereby entering into the groove of the fixed base 1 and being discharged by the exhaust nozzle 4. The exhaust nozzle 4 is connected to the gas detection equipment to detect the leaked helium, and it is judged that the air tightness of the battery top cover 22 is unqualified. When the air tightness test of the battery top cover 22 passes, the air inlet nozzle 5 and the pressure relief nozzle 10 are closed, and the exhaust nozzle 8 is opened to extract the helium in the sealed cavity 11 to complete the helium recovery operation, and the helium is recovered into the container for reuse. Secondly, the sealed cavity 11 is in a negative pressure state, the exhaust nozzle 8 is closed, and the pressure relief nozzle 10 is opened, and air is introduced from the pressure relief nozzle 10 on the right to break the air, thereby completing the pressure relief operation in the sealed cavity 11.

[0050] At the same time, traditional equipment does not have an auxiliary positioning structure. When performing the battery cover airtightness test, the battery cover needs to be installed in the test fixture. Manual installation of the battery cover is prone to tilting, making it impossible to accurately dock the battery cover and the test fixture, which is prone to leakage and reduces its detection accuracy.

[0051] To this end, by providing a positioning member 13, when the recyclable helium gas helium inspection tool is used, it has an installation positioning structure to avoid the battery cover from being misplaced during installation, thereby improving its detection accuracy;

[0052] When in use, in order to avoid the battery top cover 22 from being misplaced during the airtightness detection and installation operation, the battery top cover 22 is placed on the inner side of the fixed frame 16, and the four groups of cylinder bodies 17 are driven at the same time, so that the four groups of positioning clips 18 move at the same time, so that the four groups of positioning clips 18 drive the battery top cover 22 to be aligned in the center, so that the battery top cover 22 and the airtight cover 3 are aligned up and down, and the battery top cover 22 can be avoided from being misplaced when the battery top cover 22 and the airtight cover 3 are pressed together. Secondly, the telescopic rod 20 is set to provide a telescopic adjustment structure between the fixed frame 16 and the docking angle sleeve 19. When the fixed frame 16 is pulled, the telescopic rod 20 is pulled out of the fixed frame 16, and the docking angle sleeve 19 is clamped at the four corners of the fixed base 1. The use size of the fixed frame 16 can be adjusted arbitrarily, so that the positioning member 13 can be installed on fixed bases 1 of different sizes for use;

[0053] Secondly, the traditional equipment does not have an auxiliary discharge structure. When the battery cover plate air tightness test is performed, the battery cover plate will be stuck in the groove structure of the test tooling. After the test, it needs to be manually removed, which increases the difficulty of the battery cover plate removal operation and has a single functionality.

[0054] To this end, by providing a ejector 15, when the recyclable helium gas helium inspection tool is used, it has an ejection type discharge structure, making the battery cover plate taking operation more convenient and improving its inspection efficiency;

[0055] During operation, by using the setting of two sets of ejectors 15, after the battery top cover 22 completes the airtightness test, when the airtight cover 3 moves up, the spring 27 can be used to drive the lifting top plate 26 to move up, so that the lifting top plate 26 lifts the battery top cover 22 from the bottom, making it easier to remove the battery top cover 22. The position of the fixed clip 25 can be adjusted arbitrarily by using the telescopic plate 23, so that the fixed clip 25 is stuck in the groove of the fixed base 1. The setting of two sets of fixed clips 25 can meet the fixing operation of fixed bases 1 with different structures, thereby improving the application range of the ejector 15.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A recyclable helium inspection tool, characterized in that: The invention comprises a fixed base (1), a lifting and lowering pressure plate (2) and a fixed top plate (7), wherein the fixed top plate (7) is fixedly mounted above the fixed base (1), and the fixed top plate (7) and the fixed base (1) are butt-jointed and fixed via four lifting guide pillars (9), the lifting and lowering pressure plate (2) is movably mounted between the fixed top plate (7) and the fixed base (1), and the lifting and lowering pressure plate (2) is movably sleeved on the outer surface of the lifting guide pillars (9), and an airtight cover (3) is fixedly mounted at the middle position of the lower end of the lifting and lowering pressure plate (2). A groove for use with the airtight cover (3) is provided in the middle of the upper end of the fixed base (1), a sealing cavity (11) is provided on the inner side of the lower end of the airtight cover (3), an air inlet nozzle (5) is provided at the front end of the airtight cover (3), an exhaust nozzle (8) is fixedly installed on the outer surface of one side of the airtight cover (3), a pressure relief nozzle (10) is fixedly installed on the outer surface of the other side of the airtight cover (3), and a positioning member (13) for correcting the installation position of the battery top cover (22) is installed on the outer side of the upper end of the fixed base (1).

2. The recoverable helium inspection tool according to claim 1, characterized in that: The upper outer surface of the fixed base (1) and the lower outer surface of the airtight cover (3) are both provided with sealing rings (14), and an exhaust nozzle (4) is fixedly installed at the middle position of the lower end of the fixed base (1).

3. The recoverable helium inspection tool according to claim 1, characterized in that: The positioning member (13) comprises a fixed frame (16) and four groups of cylinder bodies (17); the fixed frame (16) is in an overall rectangular frame structure; the four groups of cylinder bodies (17) are all arranged at the middle of the side of the fixed frame (16); and positioning clips (18) are arranged at the telescopic ends of the cylinder bodies (17).

4. The recoverable helium inspection tool according to claim 3, characterized in that: The four corners of the fixed frame (16) are all provided with docking corner sleeves (19), the docking corner sleeves (19) and the fixed frame (16) are movably connected via a telescopic rod (20), and a notch for use with the telescopic rod (20) is provided inside the fixed frame (16).

5. The helium inspection tool for recoverable helium according to claim 4, characterized in that: Two groups of cushion blocks (21) are fixedly installed on the inner side of the docking angle sleeve (19), and one end of the cylinder body (17) and the fixed frame (16) are docked and fixed via a connecting plate (30).

6. The recoverable helium inspection tool according to claim 1, characterized in that: Two groups of ejectors (15) are installed in the groove of the fixed base (1), and a lifting top plate (26) is movably installed on the upper end of the ejector (15). The ejector (15) and the lifting top plate (26) are elastically connected via a spring (27).

7. The recoverable helium inspection tool according to claim 6, characterized in that: A lifting block (24) is movably installed between the ejector (15) and the lifting top plate (26), and fixed clamping strips (25) are movably installed on both sides of the ejector (15). The ejector (15) and the fixed clamping strip (25) are movably connected via a telescopic plate (23), and a bolt body for locking the telescopic plate (23) is provided on the side of the ejector (15).

8. The recoverable helium inspection tool according to claim 3, characterized in that: A push rod (29) is movably mounted in the middle of one end of the cylinder body (17), and the push rod (29) and the positioning clamping strip (18) are connected via a screw rod (28).

9. The recoverable helium inspection tool according to claim 1, characterized in that: Two groups of power cylinders (6) are arranged at the upper end of the fixed top plate (7), and the lifting and pressing plate (2) and the fixed top plate (7) are driven by the two groups of power cylinders (6) in cooperation with the rod body.

10. The recoverable helium inspection tool according to claim 1, characterized in that: The four corners of the lifting and lowering plate (2) are all provided with guide grooves (12) used in conjunction with the lifting guide pillars (9), and rollers are installed on the inner sides of the guide grooves (12).

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