Helium detection tooling

Abstract

The utility model provides a kind of helium detection tool.The present helium detection tool, including bottom plate, it is characterized in that, still include driving element, detection board one, detection board two and limiting structure, above-mentioned driving element is fixedly connected in bottom plate one side, above-mentioned detection board one inside is connected with driving element, above-mentioned limiting structure is located in bottom plate other side, above-mentioned detection board two is located between detection board one and limiting structure, when driving element drives detection board one to translate, above-mentioned detection board two can be tightly pressed between detection board one and limiting structure;The detection board one outside has recessed gas cavity, and the detection board two inside has recessed detection cavity;When battery shell is sleeved on detection board two, battery shell can be tightly pressed between detection board one and detection board two and explosion-proof valve on battery shell is located between gas cavity and detection cavity.The present helium detection tool detects low cost.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically to helium inspection tooling. Background Technology

[0002] The battery casing is typically formed using an aluminum extrusion process, followed by welding an explosion-proof valve upwards. After welding, an airtightness test must be performed on the weld seam of the explosion-proof valve. Existing testing fixtures mainly consist of a hollow mold core with plugs at both ends for sealing the battery casing.

[0003] A through hole is provided on the hollow mold core, corresponding to the position of the explosion-proof valve mounting hole on the battery casing; at the same time, a vacuum hole connected to a vacuum pumping device is provided on the hollow mold core, and a helium detection connector for connecting to a helium detection mechanism is also provided.

[0004] During testing, the battery casing is first fitted and secured inside the hollow mold core, then both ends of the battery casing are sealed. A vacuum is created inside the hollow mold core and outside the battery casing; this vacuum chamber is connected to a leak detector. Helium gas is then introduced into the battery casing at a certain pressure. If a leak exists in the weld at the explosion-proof valve, helium gas will enter the vacuum chamber through the leak and flow into the leak detector. Due to the large volume of the internal cavity, the helium consumption during the helium detection process is high, ultimately leading to excessive testing costs. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a helium detection fixture with relatively low detection costs and high stability.

[0006] To achieve the above objectives, this utility model can be implemented through the following technical solutions:

[0007] A helium detection fixture includes a base plate, characterized in that it further includes a driving component, a first detection plate, a second detection plate, and a limiting structure. The driving component is fixedly connected to one side of the base plate, the inner side of the first detection plate is connected to the driving component, the limiting structure is located on the other side of the base plate, and the second detection plate is located between the first detection plate and the limiting structure. When the driving component drives the first detection plate to translate, the second detection plate can be pressed tightly between the first detection plate and the limiting structure.

[0008] The outer side of the first detection plate has a recessed gas cavity, and the inner side of the second detection plate has a recessed detection cavity.

[0009] When the battery casing is placed on the second detection plate, the battery casing can be pressed tightly between the first and second detection plates, and the explosion-proof valve on the battery casing is located between the gas chamber and the detection chamber.

[0010] The first detection plate has a vacuum channel that can evacuate the gas cavity, and the second detection plate has a helium channel that injects helium into the detection cavity.

[0011] In the helium detection fixture described above, the limiting structure is a limiting block fixed to the base plate, and the limiting block and the driving component are located on both sides of the base plate, respectively.

[0012] In the helium detection fixture described above, a slide rail is fixedly connected to the base plate, and a recessed limiting seat is provided on the limiting block. The upper part of the limiting seat is flush with the upper part of the slide rail, and the second detection plate is embedded in the limiting seat with its lower part abutting against the slide rail.

[0013] In the helium inspection fixture described above, there are two limiting blocks, and the two limiting blocks are located at both ends of the base plate. The slide rail and the limiting blocks are set in a one-to-one correspondence.

[0014] In the helium inspection fixture described above, the slide rail includes a block-shaped base and a long strip-shaped support block. The support block is located on top of the base and its size is smaller than that of the base.

[0015] In the helium detection fixture described above, the base block and the support block are an integral structure, and the two ends of the support block are flush with the two ends of the base block.

[0016] In the helium detection fixture described above, the driving component includes a cylinder and a connecting component. The connecting component is U-shaped and the bottom of the U-shape of the connecting component is fixedly connected to the piston rod of the cylinder. The inner side of the detection plate is embedded in the U-shaped recess of the connecting component and the two are fixedly connected.

[0017] In the helium detection fixture described above, a helium sensor can be installed at the extraction channel.

[0018] In the helium detection fixture described above, the two ends of the detection plate have protruding connecting sections. The connecting sections are located on the detection plate two near the driving component. The width of the connecting sections is smaller than the width of the detection plate two, and the connecting sections are embedded in the limiting seat of the limiting block.

[0019] In the helium detection fixture described above, both the first detection plate and the second detection plate are long plates, and the base plate has several driving components, which are evenly distributed along the length of the first detection plate.

[0020] Compared to existing technologies, this helium detection fixture only allows a small amount of helium to enter the extraction channel after the explosion-proof valve ruptures. Once helium enters the extraction channel, a helium sensor at the extraction channel promptly sends a warning message. It can be seen that this fixture consumes significantly less helium during the detection process, effectively reducing detection costs.

[0021] Meanwhile, the second detection board can connect to multiple battery casings simultaneously, thus its detection efficiency is relatively high and it has great application value.

[0022] In addition, the second detection plate is supported by the limiting block and the slide rail, which ensures that the detection plate moves smoothly between the detection plate and the limiting block, and its stability is relatively high. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the helium detection fixture.

[0024] Figure 2 This is a three-dimensional structural diagram of the helium testing tool after it has been installed into the battery casing.

[0025] Figure 3 This is a three-dimensional structural diagram of the battery casing.

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the detection plate.

[0027] Figure 5 This is a cross-sectional structural diagram of the first detection plate.

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of detection plate two.

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure at the base plate.

[0030] Figure 8 yes Figure 5 A schematic diagram of the partial structure at part A in the middle.

[0031] In the picture:

[0032] 1. Base plate; 2. Detection plate one; 21. Gas cavity; 22. Gas extraction channel; 3. Detection plate two; 31. Detection cavity; 32. Helium channel; 33. Connecting section; 4. Limiting block; 41. Limiting seat; 5. Slide rail; 51. Base block; 52. Support block; 6. Cylinder; 7. Connecting piece; 8. Sealing ring one; 9. Sealing ring two; 10. Explosion-proof valve; 11. Battery casing. Detailed Implementation

[0033] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0034] like Figure 1-8As shown, this helium detection fixture includes a base plate 1, a driving component, a detection plate 2, a detection plate 3, and a limiting structure. The driving component is fixed to one side of the base plate 1, the inner side of the detection plate 2 is connected to the driving component, the limiting structure is located on the other side of the base plate 1, and the detection plate 3 is located between the detection plate 2 and the limiting structure. When the driving component moves the detection plate 2 to a translational position, the detection plate 3 can be pressed tightly between the detection plate 2 and the limiting structure.

[0035] The outer side of the detection plate 2 has a recessed gas cavity 21, and the inner side of the detection plate 3 has a recessed detection cavity 31.

[0036] When the battery casing is placed on the detection plate 2 3, the battery casing can be pressed tightly between the detection plate 1 2 and the detection plate 2 3, and the explosion-proof valve on the battery casing is located between the gas chamber 21 and the detection chamber 31.

[0037] The detection plate 2 has a vacuum channel 22 that can evacuate the gas cavity 21, and the detection plate 3 has a helium channel 32 that injects helium into the detection cavity 31.

[0038] The battery casing 11 is fitted onto the detection plate 2 3, and then the detection plate 2 3 with the battery casing is placed between the detection plate 1 2 and the limiting structure. After the driving component moves the detection plate 1 2, the detection plate 2 3 is pressed tightly between the detection plate 1 2 and the limiting structure. At the same time, the battery casing is pressed tightly between the detection plate 1 2 and the detection plate 2 3, and the explosion-proof valve on the battery casing is located exactly between the gas chamber 21 and the detection chamber 31.

[0039] After continuous evacuation through the evacuation channel 22, the gas cavity 21 is brought to a vacuum state. A suitable amount of helium can then be injected into the detection cavity 31 through the helium channel 32.

[0040] When the explosion-proof valve 10 is in normal condition, the gas cavity 21 and the detection cavity 31 are two independent cavities under the action of the explosion-proof valve 10. That is to say, the helium in the detection cavity 31 will not enter the gas cavity 21.

[0041] Conversely, if the explosion-proof valve breaks, helium gas in the detection chamber 31 will enter the gas chamber 21. A component capable of detecting helium gas is located in the extraction channel 22. Therefore, the explosion-proof valve can be promptly notified to the testing personnel if it breaks. Since the helium gas detection component is existing technology, its specific technical solution will not be described in detail in this embodiment.

[0042] Of course, after the above testing is completed, the drive unit moves the first testing plate 2 in the opposite direction. After the first testing plate 2 moves away from the second testing plate 3, the battery casing on the second testing plate 3 can be easily removed.

[0043] The limiting structure is a limiting block 4 fixed to the base plate 1, and the limiting block 4 and the driving component are located on both sides of the base plate 1 respectively.

[0044] Both detection plate 2 and detection plate 3 are located between the limiting block 4 and the driving component. Since detection plate 2 is fixedly connected to the driving component, detection plate 3 is ultimately located between detection plate 2 and the limiting block 4.

[0045] A slide rail 5 is fixedly connected to the base plate 1. The limiting block 4 has a recessed limiting seat 41. The upper part of the limiting seat 41 is flush with the upper part of the slide rail 5. The detection plate 2 3 is embedded in the limiting seat 41 and the lower part of the detection plate 2 3 abuts against the slide rail 5.

[0046] Slide rail 5 has two functions:

[0047] Firstly, the contact area between the second detection plate 3 and the base plate 1 is reduced, thereby reducing frictional resistance and ensuring that the second detection plate 3 can move smoothly under the action of the driving component;

[0048] Secondly, the bottom of the detection plate 2 3 is supported by the slide rail 5, and the upper part of the slide rail 5 is flush with the limit seat 41, which enables the detection plate 2 3 to move smoothly.

[0049] The number of the limiting blocks 4 is two, and the two limiting blocks 4 are located at both ends of the base plate 1 respectively. The slide rail 5 is set in a one-to-one correspondence with the limiting blocks 4.

[0050] This structure provides stable support to both ends of the second detection plate 3, ultimately ensuring the smooth movement of the second detection plate 3.

[0051] The slide rail 5 includes a block-shaped base 51 and a strip-shaped support block 52. The support block 52 is located on top of the base 51 and its size is smaller than that of the base 51.

[0052] The large contact area between the bottom block 51 and the bottom plate 1 enables the slide rail 5 to be stably fixed on the bottom plate 1. The small contact area between the support block 52 and the detection plate 3 effectively reduces the frictional resistance during the movement of the detection plate 3.

[0053] The base block 51 and the support block 52 are an integral structure, and the two ends of the support block 52 are flush with the two ends of the base block 51.

[0054] This can appropriately improve the structural compactness of slide rail 5.

[0055] The driving component includes a cylinder 6 and a connector 7. The connector 7 is U-shaped and the bottom of the U-shape of the connector 7 is fixedly connected to the piston rod of the cylinder 6. The inner side of the detection plate 2 is embedded in the U-shaped recess of the connector 7 and the two are fixedly connected.

[0056] After the detection plate 2 is inserted into the U-shaped notch of the connector 7, the detection plate 2 and the connector 7 can be pre-positioned. Subsequently, the detection plate 2 and the connector 7 can be easily positioned and connected by fasteners.

[0057] A helium sensor can be installed at the extraction channel 22. The helium sensor is connected to a corresponding warning device; once the helium sensor detects the presence of helium, the corresponding warning device will issue a warning signal.

[0058] The helium sensor is connected to the corresponding warning device, which is a buzzer, via a data signal line. Of course, depending on the specific circumstances, a flashing warning light is also a viable alternative.

[0059] The detection plate 2 has a protruding connecting section 33 at its end. The connecting section 33 is located on the side of the detection plate 2 3 close to the driving component. The width of the connecting section 33 is smaller than the width of the detection plate 2 3, and the connecting section 33 is embedded in the limiting seat 41 of the limiting block 4.

[0060] Since the width of the connecting section 33 is smaller than the width of the detection plate 2 3, the distance between the limiting block 4 and the detection plate 2 3 can be closer, thus avoiding the limiting plate 2 3 occupying too much space on the base plate 1.

[0061] Both the detection plate 1 (2) and the detection plate 2 (3) are long plates. The base plate 1 has several driving components, which are evenly distributed along the length of the detection plate 1 (2).

[0062] After multiple battery casings are fitted onto the second detection plate 3, the multiple battery casings are arranged along the length of the second detection plate. In other words, this fixture can inspect multiple battery casings at once.

[0063] In this embodiment, a sealing ring 8 is provided at the port of the gas cavity 21 to increase the sealing between the detection plate 2 and the battery casing.

[0064] Meanwhile, a second sealing ring 9 is provided at the port of the air extraction channel 22. Since the battery casing occupies a certain space after being tightly pressed between the first detection plate 2 and the second detection plate 3, the sealing ring 9 can ensure the airtightness of the air extraction channel 22.

[0065] In use, first wrap Teflon around the surface of the second detection plate, and then drill holes in the Teflon corresponding to the detection cavity and the venting channel. Then, put the battery casing onto the second detection plate.

[0066] This helium testing fixture only allows a small amount of helium to enter the extraction channel after the explosion-proof valve ruptures. Once helium enters the extraction channel, a helium sensor at the extraction channel promptly sends an alert. It can be seen that this fixture consumes relatively little helium during the testing process, effectively reducing testing costs.

[0067] Meanwhile, the second detection board can connect to multiple battery casings simultaneously, thus its detection efficiency is relatively high and it has great application value.

[0068] In addition, the second detection plate is supported by the limiting block and the slide rail, which ensures that the detection plate moves smoothly between the detection plate and the limiting block, and its stability is relatively high.

[0069] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0070] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A helium detection fixture, comprising a base plate, characterized in that, It also includes a driving component, a first detection plate, a second detection plate, and a limiting structure. The driving component is fixed to one side of the base plate. The inner side of the first detection plate is connected to the driving component. The limiting structure is located on the other side of the base plate. The second detection plate is located between the first detection plate and the limiting structure. When the driving component moves the first detection plate horizontally, the second detection plate can be pressed tightly between the first detection plate and the limiting structure. The outer side of the first detection plate has a recessed gas cavity, and the inner side of the second detection plate has a recessed detection cavity. When the battery casing is placed on the second detection plate, the battery casing can be pressed tightly between the first and second detection plates, and the explosion-proof valve on the battery casing is located between the gas chamber and the detection chamber. The first detection plate has a vacuum channel that can evacuate the gas cavity, and the second detection plate has a helium channel that injects helium into the detection cavity.

2. The helium detection fixture according to claim 1, characterized in that, The limiting structure is a limiting block fixed to the base plate, and the limiting block and the driving component are located on both sides of the base plate respectively.

3. The helium detection fixture according to claim 2, characterized in that, A slide rail is fixedly connected to the base plate, and a recessed limiting seat is provided on the limiting block. The upper part of the limiting seat is flush with the upper part of the slide rail. The second detection plate is embedded in the limiting seat and the lower part of the second detection plate abuts against the slide rail.

4. The helium detection fixture according to claim 3, characterized in that, The number of the limiting blocks is two, and the two limiting blocks are located at both ends of the base plate respectively. The slide rail and the limiting blocks are set in a one-to-one correspondence.

5. The helium detection fixture according to claim 3, characterized in that, The slide rail includes a block-shaped base and a strip-shaped support block, with the support block located on top of the base and its size being smaller than that of the base.

6. The helium detection fixture according to claim 5, characterized in that, The base block and the support block are an integral structure, and the two ends of the support block are flush with the two ends of the base block.

7. The helium detection fixture according to any one of claims 1, 2, 3, 4, 5, or 6, characterized in that, The driving component includes a cylinder and a connecting component. The connecting component is U-shaped and the bottom of the U-shape of the connecting component is fixedly connected to the piston rod of the cylinder. The inner side of the detection plate is embedded in the U-shaped recess of the connecting component and the two are fixedly connected.

8. The helium detection fixture according to claim 7, characterized in that, A helium sensor can be installed at the air extraction channel.

9. The helium detection fixture according to claim 3, characterized in that, The detection plate has a protruding connecting section at both ends. The connecting section is located on the side of the detection plate close to the driving component. The width of the connecting section is smaller than the width of the detection plate and the connecting section is embedded in the limiting seat of the limiting block.

10. The helium detection fixture according to claim 7, characterized in that, Both the first detection plate and the second detection plate are long plates. The base plate has several driving components, which are evenly distributed along the length of the first detection plate.

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