Helium leak detection apparatus

Abstract

This disclosure provides a helium leak detection device, comprising a frame, a sensor, a contour block, a housing, an upper clamping mechanism, and a lateral clamping mechanism. The frame has a worktable with a sealing ring. An extraction port and an inlet are located around the periphery of the worktable. The extraction port is connected to a vacuum pump, and the inlet is connected to a helium storage device. The contour block is located inside the sealing ring, and the housing is placed on the worktable. During testing, the product is placed on the contour block, and the upper and lateral clamping mechanisms press and seal the product. The housing is then evacuated to a vacuum state, and helium is introduced into the product's cavity. The sensor detects the helium concentration, and the leakage status of the product's cavity is determined based on the helium concentration. The helium leak detection device has a simple structure, high efficiency, and requires no subsequent processing.

Description

Technical Field

[0001] This disclosure relates to the technical field of detection devices, and in particular to a helium leak detection device. Background Technology

[0002] In the fields of new energy vehicles and high-end electronics and electrical engineering, the sealing performance of capacitor banks, as energy storage components, directly affects the reliability, safety, and service life of the product. The intrusion of moisture and dust can lead to short circuits in the internal circuitry of the capacitor, decreased insulation performance, and even malfunctions. Therefore, testing the sealing performance of capacitor banks is a crucial quality control step during the manufacturing process.

[0003] Currently, traditional methods for this type of sealing inspection in the industry mainly include the pressure decay method and the water test method. The pressure decay method involves filling the chamber with compressed gas and monitoring pressure changes over a period of time to determine if a leak exists. While this method is commonly used, it is easily affected by changes in ambient temperature, has limited sensitivity for detecting micro-leaks, and its efficiency is insufficient for high-speed production lines. The water test method involves immersing the chamber in water to observe whether steam escapes from the steam drum. Although this method is intuitive, it is a destructive testing method requiring subsequent verification and cannot be used for online full inspection. Furthermore, the product needs to be dried after the test, resulting in low testing efficiency and the risk of introducing secondary contamination or damaging the product. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a helium leak detection device with a simple structure and high detection efficiency.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] A helium leak detection device, comprising:

[0007] The frame is provided with a worktable, the worktable is provided with a sealing ring, the worktable has an air extraction port and a through hole, the air extraction port and the through hole are both located inside the sealing ring, the air extraction port is used to communicate with a vacuum pumping device, and the through hole is used to pass through a helium input pipe.

[0008] A sensor is installed at the air extraction port;

[0009] A contour block is disposed on the worktable and located inside the sealing ring. The side wall of the contour block has an air inlet. The contour block has a positioning protrusion and an air outlet. The air outlet is located inside the positioning protrusion. The shape of the positioning protrusion is adapted to the contour of the contact surface of the product. The air inlet and the air outlet are connected. The helium input pipe is connected to the air inlet.

[0010] The box body is covered by the workbench, the periphery of the box body is movably abutted against the sealing ring, and the outer side wall of the box body has a through hole;

[0011] The upper pressing mechanism includes a first guide assembly and an upper pressing assembly. The first guide assembly includes a support frame and a first driving member. The support frame is disposed on the worktable, and the first driving member is disposed at the end of the support frame away from the worktable. The telescopic end of the first driving member is connected to the outer wall of the box body, and the box body is slidably connected to the support frame. The upper pressing assembly includes a first pressure rod. One end of the first pressure rod is connected to the inner wall of the box body, and the other end of the first pressure rod is movably abutting against the top surface of the product.

[0012] A lateral clamping mechanism includes a second guide assembly, a lateral clamping assembly, and a reset assembly. The second guide assembly includes a second drive member, a guide rail, and a slider. The second drive member is disposed on the outside of the housing and corresponds to the through hole. The guide rail is disposed on the worktable and located inside the housing. The slider is slidably connected to the guide rail. The telescopic end of the second drive member passes through the through hole and movably abuts against the slider. The lateral clamping assembly includes two pressure rods. One end of the second pressure rod is connected to the slider, and the other end of the second pressure rod movably abuts against the side of the product. The reset assembly is disposed on one side of the guide rail and is connected to the slider to reset the slider.

[0013] Compared with the prior art, this disclosure has at least the following advantages:

[0014] 1. The aforementioned helium leak detection device works by evacuating the sealed space formed by the chamber and workbench to a vacuum state. The product is then pressed tightly against a conformal block, with the vent located within the product's inner cavity. Helium is then supplied through the helium inlet pipe into the vent, and the helium enters the product's inner cavity through the vent. Finally, the product's sealing performance is determined by detecting the helium concentration within the chamber. The device is simple and convenient to operate, highly efficient, requires no subsequent processing, and avoids the introduction of secondary contamination.

[0015] 2. The helium leak detection device uses the first pressure rod of the upper clamping mechanism to press the product downwards, ensuring that the groove on the bottom surface of the product fits against the positioning protrusion. This prevents helium from leaking into the chamber through the gap between the protruding block and the product, thus ensuring the accuracy of the test results. Simultaneously, a sealing ring is installed at the edge of the worktable. The chamber slides downwards along the support frame and abuts against the sealing ring, ensuring the airtightness of the chamber space and preventing any impact on the test results. Furthermore, the upper clamping mechanism and the lateral clamping mechanism work together to fix the product in the test position, preventing product displacement during the test and ensuring the accuracy of the test results.

[0016] 3. The helium leak detection device reduces the volume of the housing by externalizing the first and second driving components, resulting in a more compact overall structure. This reduces openings in the housing, ensuring its airtightness and improving detection accuracy. Simultaneously, a reset component is included to reset the slider, eliminating the need for connection to the second telescopic end for reset and facilitating housing movement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a helium leak detection device in practice;

[0019] Figure 2 for Figure 1 A cross-sectional view of the helium leak detection device shown;

[0020] Figure 3 for Figure 2 Enlarged view of section A shown

[0021] Figure 4 for Figure 1 The diagram shows another configuration of the helium leak detection device.

[0022] Figure 5 for Figure 1 A schematic diagram of the workbench of the helium leak detection device shown.

[0023] Figure 6 for Figure 1 The diagram shows the structure of the upper clamping mechanism of the helium leak detection device.

[0024] Figure 7 for Figure 1 A schematic diagram of the casing of the helium leak detection device is shown.

[0025] Figure 8 for Figure 1 The diagram shows the structural schematic of the lateral clamping assembly of the helium leak detection device. Detailed Implementation

[0026] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0030] Please see Figures 1 to 8This is a helium leak detection device 10 according to an embodiment of the present invention, which includes a frame 100, a sensor (not shown), a contour block 200, a housing 300, an upper clamping mechanism 400, and a lateral clamping mechanism 500. The frame 100 is provided with a worktable 110, which is provided with a sealing ring 111. The worktable 110 has an extraction port 1101 and a through hole 1102, both located inside the sealing ring 111. The extraction port 1101 is used to communicate with a vacuum device (not shown), and the through hole 1102 is used to pass through a helium input pipe 600. The sensor is installed at the extraction port 1101. A contour block 200 is disposed on the worktable 110 and located inside the sealing ring 111. An air inlet 201 is provided on the side wall of the contour block 200. The contour block 200 has a positioning protrusion 202 and an air outlet 203. The air outlet 203 is located inside the positioning protrusion 202. The shape of the positioning protrusion 202 matches the contour of the contact surface of the product 20. The air inlet 201 and the air outlet 203 are connected. A helium inlet pipe 600 is connected to the air inlet 201. A housing 300 is disposed on the worktable 110. The periphery of the housing 300 movably abuts against the sealing ring 111. A through hole 301 is provided on the outer side wall of the housing 300. A flange 310 is formed on the top of the housing 300, and a guide hole (not shown) is provided on the flange 310. The upper pressing mechanism 400 includes a first guide assembly 410 and an upper pressing assembly 420. The first guide assembly 410 includes a support frame 411 and a first driving member 412. The support frame 411 is disposed on the worktable 110. The first driving member 412 is disposed at the end of the support frame 411 away from the worktable 110. The telescopic end of the first driving member 412 is connected to the outer wall of the housing 300. The housing 300 is slidably connected to the support frame 411. The upper pressing assembly 420 includes a first pressure rod 421. One end of the first pressure rod 421 is connected to the inner wall of the housing 300. The other end of the first pressure rod 421 is in movable contact with the top surface of the product 20. The lateral clamping mechanism 500 includes a second guide assembly 510, a lateral clamping assembly 520, and a reset assembly 530. The second guide assembly 510 includes a second drive member 511, a guide rail 512, and a slider 513. The second drive member 511 has a through hole 301 on the outside of the housing 300 and corresponds to the through hole 301. The guide rail 512 is located on the worktable 110 and inside the housing 300. The slider 513 is slidably connected to the guide rail 512. The telescopic end of the second drive member 511 passes through the through hole 301 and movably abuts against the slider 513. The lateral clamping assembly 520 includes a second pressure rod 521. One end of the second pressure rod 521 is connected to the slider 513, and the other end of the second pressure rod 521 movably abuts against the side of the product 20. The reset assembly 530 is located on one side of the guide rail 512 and is connected to the slider 513 to reset the slider 513.

[0031] Specifically, product 20 is placed on contour block 200. The telescopic end of the first driving component 412 extends, pushing the housing 300 downwards along the support frame 411 until the periphery of the housing 300 abuts against the sealing ring 111. Simultaneously, the first pressure rod 421 in the housing 300 abuts against the top surface of product 20, pressing the bottom surface of product 20 tightly against contour block 200. Then, the telescopic end of the second driving component 511 extends into the housing 300 through the through hole 301 and abuts against the push slider 513, thereby driving the second pressure rod 521 to abut against the side of product 20. Subsequently, the vacuum equipment is activated to evacuate the inside of housing 300 to a vacuum state, and then helium is supplied to the air inlet through helium input pipe 600. The helium enters the inner cavity of product 20 through air outlet 203. Finally, the helium content inside housing 300 is detected by a sensor to determine the sealing performance of product 20.

[0032] After the test is completed, the telescopic end of the second driving component 511 retracts, and the reset assembly 530 drives the slider 513 to reset, thereby moving the second pressure rod 521 away from the side of the product 20. Subsequently, the telescopic end of the first driving component 412 retracts, causing the housing 300 to slide upward along the support frame 411, moving the first pressure rod 421 away from the top surface of the product 20, until the housing 300 resets and the product 20 is removed. The helium leak detection device 10 is simple and convenient to operate, highly efficient, requires no subsequent processing, and avoids the introduction of secondary pollution.

[0033] In this embodiment, the helium leak detection device 10 presses the product 20 downwards using the first pressure rod 421 of the upper pressing mechanism 400, causing the groove on the bottom surface of the product 20 to fit against the positioning protrusion 202. This prevents helium from leaking into the housing 300 through the gap between the contour block 200 and the product 20, thus ensuring the accuracy of the test results. Furthermore, the upper pressing mechanism 400 and the lateral pressing mechanism 500 press and fix the product 20 in the test position using the positioning protrusion 202 on the contour block 200, ensuring that the product 20 will not shift during the test, thus ensuring the accuracy of the test. Furthermore, the upper pressing mechanism 400 and the lateral pressing mechanism 500 work together to fix the product 20 on the contour block 200, preventing the product 20 from shifting during the test, thus ensuring the accuracy of the test results.

[0034] Meanwhile, a sealing ring 111 is provided at the edge of the workbench 110. The housing 300 slides downward along the support frame 411 and abuts against the sealing ring 111, ensuring the airtightness of the housing 300 space and avoiding affecting the test results. In addition, by placing the first drive component 412 and the second drive component 511 externally, the volume of the housing 300 can be reduced, making the overall structure compact, reducing the number of openings on the housing 300, ensuring the airtightness of the housing 300 space, and improving the accuracy of the test. At the same time, by setting a reset component 530, the slider 513 is driven to reset, so that the slider 513 does not need to be reset by connecting to the second telescopic end, which facilitates the movement of the housing 300.

[0035] like Figure 4 As shown, in one embodiment, the worktable 110 has a sealing groove 1103, and the sealing ring 111 is embedded in the sealing groove 1103. It can be understood that the sealing groove 1103 provides precise installation positioning and circumferential constraint for the sealing ring 111, preventing it from shifting during use and ensuring the reliability and durability of the seal.

[0036] like Figure 2 , Figure 6 and Figure 7 As shown, in one embodiment, the upper clamping assembly 420 further includes a mounting plate 422, which is detachably connected to the inner wall of the housing 300. The first pressure rod 421 is connected to the mounting plate 422. It is understood that the first pressure rod 421 of the upper clamping assembly 420 is mounted on the mounting plate 422. The entire upper clamping assembly 420 can be replaced by replacing the mounting plate 422, facilitating replacement and adjustment, adapting to various products 20, and improving the flexibility of the helium leak detection device 10. Furthermore, the mounting plate 422 is connected to the housing 300 via connectors (not shown) at its four corners. First connection holes 4221 are provided at the four corners of the mounting plate 422, and the connectors are located within these first connection holes 4221, allowing installation from inside the housing 300. This eliminates the need for through holes in the housing 300, improving the sealing of the housing 300 space during testing and ensuring the accuracy of the test results.

[0037] like Figure 3 , Figure 6 and Figure 7As shown, in one embodiment, the upper clamping assembly 420 further includes a first connecting flange 423. The mounting plate 422 has a mounting hole 4222, and the first connecting flange 423 is fitted into the mounting hole 4222. One end of the first pressure rod 421 is located within the first connecting flange 423. In this embodiment, the first pressure rod 421 is connected to the mounting plate 422 via the first connecting flange 423, thereby connecting to the housing 300. This reduces the number of openings in the housing 300, improves the sealing of the housing 300 space during testing, and ensures the accuracy of the test results. Simultaneously, the first connecting flange 423 provides support for the first pressure rod 421, improving movement accuracy and stability.

[0038] like Figure 1 and Figure 6 As shown, in one embodiment, the support frame 411 includes a support plate 4112 and a guide post 4111. One end of the guide post 4111 is fixedly connected to the workbench 110, and the other end of the guide post 4111 is provided with the support plate 4112. A flange 310 is formed on the top of the housing 300. The flange 310 has a guide hole (not shown) corresponding to the guide post 4111. The guide post 4111 is sleeved in the guide hole so that the housing 300 and the guide post 4111 are slidably connected. The support plate 4112 has a through hole 4113. The first driving member 412 is installed on the side of the support plate 4112 away from the workbench. The telescopic shaft of the first driving member 412 passes through the through hole 4113 and is connected to the housing 300. The guided sliding is achieved through the structure of the housing 300 itself, without relying on external guide rail components. Specifically, in this embodiment, a flange 310 with a guide hole is formed on the top of the housing 300, and a guide post 4111 is directly inserted through the guide post 4111, forming a sliding pair through the hole-post cooperation. This simplifies the overall structure and facilitates installation. At the same time, the first driving member 412 is disposed on the support plate 4112, simplifying the structure of the housing 300 and reducing the overall volume.

[0039] Furthermore, in one embodiment, there are four guide pillars 4111 and four guide holes. The four guide pillars 4111 are symmetrically distributed and fixed at the four corners of the worktable 110, jointly supporting the upper support plate 4112, thereby forming a highly stable support frame 411. The housing 300 is fitted onto the four guide pillars 4111 through the guide holes at the four corners of the top flange 310, ensuring that the housing 300 is subjected to uniform force during sliding, avoiding shaking, jamming or tilting during lifting, and improving the stability of the housing 300's movement.

[0040] like Figure 1 and Figure 6As shown, in one embodiment, the first guide assembly 410 further includes a sleeve 413, which is disposed in the guide hole, and the guide post 4111 passes through the sleeve 413. It is understood that one end of the sleeve 413 passes through the guide hole, and the other end of the sleeve 413 is detachably connected to the housing 300. The sleeve 413 provides guidance and support for the housing 300 to slide along the guide post 4111, reducing swaying, jamming, and shaking during the sliding process, and improving the motion rigidity and repeatability of the housing 300. Simultaneously, the sleeve 413, disposed between the guide post 4111 and the guide hole, can be replaced individually after wear, without needing to replace the entire housing 300, thus extending the service life of the helium leak detection device 10.

[0041] like Figure 2 , Figure 3 and Figure 5 As shown, in one embodiment, the lateral clamping assembly 520 further includes an assembly plate 522. The worktable 110 has an assembly groove 1104, and the assembly plate 522 is embedded in the assembly groove 1104 and detachably connected to the worktable 110. A guide rail 512 is disposed on the assembly plate 522. In this embodiment, the lateral clamping assembly 520 can be changed by replacing the assembly plate 522, which facilitates replacement and adjustment and improves the flexibility of the helium leak detection device 10. At the same time, by providing the assembly groove 1104 on the side of the worktable 110 facing the housing 300 and embedding the assembly plate 522 in the assembly groove 1104, the number of openings in the worktable 110 is reduced, improving the sealing of the housing 300 space during the detection process and ensuring the accuracy of the detection results. Further, in one embodiment, the assembly plate 522 is connected to the bottom of the assembly groove 1104 by a connector (not shown). The four corners of the assembly plate 522 have second connection holes 5221, and the connector is located in the second connection holes 5221. The stability of the lateral clamping mechanism 500 is enhanced by connecting it to the worktable 110 with connectors at the four corners of the assembly plate 522.

[0042] like Figure 7 and Figure 8 As shown, in one embodiment, both the first pressure rod 421 and the second pressure rod 521 are fitted with elastic elements 700. Specifically, in this embodiment, the elastic element 700 is a spring. The spring absorbs impact and vibration through elastic deformation, reducing rigid collisions at the moment of contact, thereby protecting the contact surface between the pressure rod and the product 20, and improving the stability and service life of the upper pressing mechanism 400 and the lateral pressing mechanism 500 during the testing process.

[0043] like Figure 3 and Figure 8As shown, in one embodiment, the second pressure rod 521 has a sealing plug 523 at its end facing the product. Specifically, in this embodiment, the second pressure rod 521 is positioned corresponding to the opening of the product 20, and its internal channel communicates with the sealed space formed by the product 20 and the contour block 200. A sealing plug 523 adapted to the opening of the product 20 is provided at the end of the second pressure rod 521, sealing the opening. This prevents helium gas from leaking from the opening, further improving the sealing performance and ensuring the accuracy of the test results.

[0044] like Figure 2 , Figure 3 and Figure 7 As shown, in one embodiment, the lateral clamping assembly 520 further includes a second connecting flange 516, which is fitted into the through hole 301. The telescopic end of the second drive member 511 passes through the second connecting flange 516. It is understood that the second connecting flange 516 provides radial support and guidance for the telescopic end of the second drive member 511, improves force distribution, ensures the direction of movement, and avoids jamming or collision. Simultaneously, it enhances the sealing of the through hole 301, preventing leakage during the testing process and affecting the test results.

[0045] like Figure 1 , Figure 6 and Figure 7 As shown, in one embodiment, the side wall of the housing 300 is provided with a mounting bracket 514 corresponding to the through hole 301, and the second driving member 511 is mounted on the mounting bracket 514. It is understood that the second driving member 511 is connected to the housing 300 through the mounting bracket 514, so that the second driving member 511 moves with the housing 300. The telescopic end of the second driving member 511 does not need to be completely withdrawn from the housing 300, ensuring that the telescopic end of the second driving member 511 is always within the through hole 301, preventing misalignment during movement, avoiding off-center loading, jamming, or collision due to positional deviation, and improving the stability and reliability of the lateral clamping mechanism 500. Simultaneously, a second connecting flange is provided in the through hole 301 as a sealing element, ensuring that the housing 300 remains effectively sealed and ensuring the reliability of the housing 300's seal during testing.

[0046] like Figure 8As shown, in one embodiment, the reset assembly 530 includes a reset spring 531, a connecting block 532, a fixed shaft 533, and fixed blocks 534 located at both ends of the fixed shaft 533. The reset assembly 530 is located on one side of the guide rail 512. The two fixed blocks 534 are arranged along the direction of the guide rail 512. The connecting block 532 is slidably connected to the fixed shaft 533. One end of the connecting block 532 is connected to the slider 513. The reset spring 531 is sleeved on the fixed shaft 533. The two ends of the reset spring 531 abut against the connecting block 532 and one of the fixed blocks 534, respectively. Specifically, in this embodiment, the telescopic end of the second driving member 511 extends to abut against the slider 513, and continues to extend to push the slider 513 forward along the guide rail 512, thereby causing the connecting block 532 to slide along the fixed axis 533, thus compressing the return spring 531 between the connecting block 532 and the fixed block 534; the telescopic end of the second driving member 511 retracts away from the slider 513, the return spring 531 returns to its original state, causing the connecting block 532 to move away from the contour block 200 along the fixed axis 533, thereby causing the slider 513 to reset. It can be understood that there is no need for a fixed connection between the second driving member 511 and the slider 513, the slider 513 does not need to be brought back by the retraction of the telescopic end of the second driving member 511, and the slider 513 and the telescopic end of the second driving member 511 do not need to be connected, so as not to interfere with the movement of the housing 300.

[0047] like Figure 8 As shown, in one embodiment, the second guide component 510 further includes a limiting block 515, which is disposed between the guide rail 512 and the contour block 200. It is understood that the slider 513 moves along the guide rail 512 toward the contour block 200 until it abuts against the limiting block 515, thereby stopping the slider 513 from moving too far and preventing the second pressure rod 521 from colliding with the product 20, thus improving the safety of the helium leak detection device 10.

[0048] like Figure 1 As shown, in one embodiment, the bottom of the frame 100 is provided with multiple casters 800. In this embodiment, there are four casters 800, which are located at the four corners of the frame 100, providing stable support, preventing tipping, and improving the smoothness of movement. The helium leak detection device 10 can be moved quickly via the casters 800, allowing the entire machine to be moved to different production lines to adapt to different production needs and reduce handling intensity.

[0049] Compared with the prior art, this disclosure has at least the following advantages:

[0050] 1. The aforementioned helium leak detection device works by evacuating the sealed space formed by the chamber and workbench to a vacuum state. The product is then pressed tightly against a conformal block, with the vent located within the product's inner cavity. Helium is then supplied through the helium inlet pipe into the vent, and the helium enters the product's inner cavity through the vent. Finally, the product's sealing performance is determined by detecting the helium concentration within the chamber. The device is simple and convenient to operate, highly efficient, requires no subsequent processing, and avoids the introduction of secondary contamination.

[0051] 2. The helium leak detection device uses the first pressure rod of the upper clamping mechanism to press the product downwards, ensuring that the groove on the bottom surface of the product fits against the positioning protrusion. This prevents helium from leaking into the chamber through the gap between the protruding block and the product, thus ensuring the accuracy of the test results. Simultaneously, a sealing ring is installed at the edge of the worktable. The chamber slides downwards along the support frame and abuts against the sealing ring, ensuring the airtightness of the chamber space and preventing any impact on the test results. Furthermore, the upper clamping mechanism and the lateral clamping mechanism work together to fix the product in the test position, preventing product displacement during the test and ensuring the accuracy of the test results.

[0052] 3. The helium leak detection device reduces the volume of the housing by externalizing the first and second driving components, resulting in a more compact overall structure. This reduces openings in the housing, ensuring its airtightness and improving detection accuracy. Simultaneously, a reset component is included to reset the slider, eliminating the need for connection to the second telescopic end for reset and facilitating housing movement.

[0053] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A helium leak detection device, characterized in that, include: The frame is provided with a worktable, the worktable is provided with a sealing ring, the worktable has an air extraction port and a through hole, the air extraction port and the through hole are both located inside the sealing ring, the air extraction port is used to communicate with a vacuum pumping device, and the through hole is used to pass through a helium input pipe. A sensor is installed at the air extraction port; A contour block is disposed on the worktable and located inside the sealing ring. The side wall of the contour block has an air inlet. The contour block has a positioning protrusion and an air outlet. The air outlet is located inside the positioning protrusion. The shape of the positioning protrusion is adapted to the contour of the contact surface of the product. The air inlet and the air outlet are connected. The helium input pipe is connected to the air inlet. The box body is covered by the workbench, the periphery of the box body is movably abutted against the sealing ring, and the outer side wall of the box body has a through hole; The upper pressing mechanism includes a first guide assembly and an upper pressing assembly. The first guide assembly includes a support frame and a first driving member. The support frame is disposed on the worktable, and the first driving member is disposed at the end of the support frame away from the worktable. The telescopic end of the first driving member is connected to the outer wall of the box body, and the box body is slidably connected to the support frame. The upper pressing assembly includes a first pressure rod. One end of the first pressure rod is connected to the inner wall of the box body, and the other end of the first pressure rod is movably abutting against the top surface of the product. A lateral clamping mechanism includes a second guide assembly, a lateral clamping assembly, and a reset assembly. The second guide assembly includes a second drive member, a guide rail, and a slider. The second drive member is disposed on the outside of the housing and corresponds to the through hole. The guide rail is disposed on the worktable and located inside the housing. The slider is slidably connected to the guide rail. The telescopic end of the second drive member passes through the through hole and movably abuts against the slider. The lateral clamping assembly includes a second pressure rod. One end of the second pressure rod is connected to the slider, and the other end of the second pressure rod movably abuts against the side of the product. The reset assembly is disposed on one side of the guide rail and is connected to the slider to reset the slider.

2. The helium leak detection device according to claim 1, characterized in that, The workbench has a sealing groove, and the sealing ring is embedded in the sealing groove.

3. The helium leak detection device according to claim 1, characterized in that, Both the first and second pressure rods are fitted with elastic elements; and / or, the second pressure rod has a sealing plug at the end facing the workpiece to be inspected.

4. The helium leak detection device according to claim 1, characterized in that, The upper clamping assembly also includes a mounting plate, which is detachably connected to the inner wall of the housing, and the first pressure rod is connected to the mounting plate.

5. The helium leak detection device according to claim 4, characterized in that, The upper clamping assembly further includes a first connecting flange, the mounting plate has a mounting hole, the first connecting flange is sleeved in the mounting hole, and one end of the first pressure rod is located inside the first connecting flange.

6. The helium leak detection device according to claim 1, characterized in that, The support frame includes a support plate and a guide post. One end of the guide post is fixedly connected to the workbench, and the other end of the guide post is provided with the support plate. A flange is formed on the top of the box body, and a guide hole corresponding to the guide post is opened on the flange. The guide post is sleeved in the guide hole so that the box body and the guide post are slidably connected. The first guide assembly also includes a sleeve, which is disposed in the guide hole, and the guide post passes through the sleeve.

7. The helium leak detection device according to claim 1, characterized in that, The lateral clamping assembly also includes an assembly plate, and the worktable has an assembly slot, in which the assembly plate is embedded.

8. The helium leak detection device according to claim 1, characterized in that, The lateral clamping assembly further includes a second connecting flange, which is fitted into the through hole, and the telescopic end of the second drive member passes through the second connecting flange; and / or, The side wall of the housing is provided with a mounting bracket corresponding to the through hole, and the second driving component is mounted on the mounting bracket.

9. The helium leak detection device according to claim 1, characterized in that, The reset assembly includes a reset spring, a connecting block, a fixed shaft, and fixed blocks located at both ends of the fixed shaft. The reset assembly is located on one side of the guide rail. The two fixed blocks are arranged along the direction of the guide rail. The connecting block is slidably connected to the fixed shaft, and one end of the connecting block is connected to the slider. The reset spring is sleeved on the fixed shaft, and both ends of the reset spring abut against the connecting block and one of the fixed blocks, respectively; and / or, The second guide component further includes a limiting block, which is disposed between the guide rail and the contour block.

10. The helium leak detection device according to claim 1, characterized in that, The bottom of the frame is equipped with multiple casters.

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