An electrical device hermetic detection apparatus and method

Abstract

The application belongs to the air tightness detection technology, and particularly relates to an electrical device air tightness detection device and method; the device comprises a detection cavity and an air charging pipeline, both of which are connected through flanges to form a communicating air passage; a position and motion control distance unit is arranged on the detection cavity; the position and motion control distance unit comprises a position and motion cylinder which is installed on the side wall of the detection cavity and is on the same side of the flange of the detection cavity, a position and motion L block, the position and motion cylinder is connected to the position and motion L block on the side close to the detection cavity in a penetrating mode, and both of them are in sliding fit; a fixing ring, a plurality of position and motion L blocks are connected to the side surface of the fixing ring; the fixing ring is sleeved on the air charging pipeline and is coaxial with the center of the flange; the inner diameter of the fixing ring is larger than the outer diameter of the flange; whether the flange joint leaks can be judged, and the test result is prevented from being misjudged due to the air leakage interference during the air charging in the electrical device air tightness detection, so that the air tightness detection precision of the device is improved, and the limitation of the device in use is reduced.

Description

Technical Field

[0001] This invention pertains to airtightness testing technology, specifically an airtightness testing device and method for electrical devices. Background Technology

[0002] Electrical devices are basic electronic / electrical components, assemblies, and equipment that utilize electrical principles to achieve specific functions, such as power conversion, signal processing, circuit control, or energy transmission. To verify whether there are tiny pores in the device's casing or sealing structure, thereby preventing the intrusion of external gases or liquids or leakage of internal media, electrical devices need to undergo airtightness testing.

[0003] Both differential pressure airtightness testing and vacuum attenuation airtightness testing require filling the testing chamber with testing gas, and the filling pipeline is usually connected to the testing chamber via a flange. However, in practical applications, existing airtightness testing devices for electrical components cannot determine whether there is a leak at the flange connection. This can lead to pressure changes monitored by the device not originating from a leak in the electrical component itself, but from a decrease in air pressure inside the testing chamber caused by a leak at the connection. This interference can easily lead to misinterpretation of test results during the testing process, ultimately significantly reducing the accuracy of the device's airtightness testing. Summary of the Invention

[0004] The technical problem to be solved by this invention is that, in the case of existing airtightness testing of electrical devices, when using flange-connected gas filling pipelines and testing chambers, it is difficult to detect and distinguish whether the pressure change is caused by leakage from the electrical device itself or leakage from the flange connection, which easily leads to misjudgment of the test results due to such interference. This invention provides an airtightness testing solution that can distinguish between flange leakage and leakage from the device itself.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is an electrical device for airtightness detection, including a detection chamber and an inflation pipeline, both of which are connected by a flange to form a connected air passage; it also includes a position control unit, a position L-block, a fixed ring, an omnidirectional leak detection device and an annular rubber airbag;

[0006] The position control unit is installed on the detection cavity to provide lockable linear displacement;

[0007] One end of the displacement L-block is slidably connected to the displacement control unit as a connecting arm, and the two are slidably engaged; the other end is fixedly connected to the stationary ring, which is used to transmit the displacement generated by the displacement control unit to the stationary ring.

[0008] The locating ring is fitted onto the inflation pipeline and is coaxial with the center of the flange; the inner diameter of the locating ring is larger than the outer diameter of the flange; the positioning control unit is driven by the positioning L-block to move axially along the inflation pipeline, serving as a platform for the bearing detection device, on which an all-around leak detection device is installed to cover the flange mating joint after positioning.

[0009] The all-around leak detection device is set on the outer wall of the fixed ring, including the gas-generating cylinder; the gas-generating cylinder inflates the annular rubber airbag, causing the inner wall of the annular rubber airbag to expand and tightly cover the outer periphery of the flange joint. The leak and leakage location are detected by detecting the annular rubber airbag.

[0010] The outer wall of the annular rubber airbag is fixedly connected to the inner wall of the stationary ring; the outer wall of the flange mating point is located within the movement path of the inner wall of the annular rubber airbag. By forming a sealing detection zone outside the flange, the invisible gas leakage is transformed into visible and measurable inner wall deformation.

[0011] Preferably, the omnidirectional leak detection device also includes a pressure regulating and positioning module for real-time monitoring of pressure changes in the sealing area and issuing an alarm when a leak occurs.

[0012] The pressure regulating and positioning module includes a first through slot, a positioning box, a pressure plate, a pressure sensor, and a pressure spring;

[0013] The first through slot is set on the fixing ring to provide a fixed position for the positioning box; the positioning box is fixed in the first through slot and communicates with the inside of the annular rubber airbag, serving as the pressure sensing chamber of the module; the pressure plate is fitted and connected to the opening of the positioning box to directly sense the air pressure changes inside the annular rubber airbag; the pressure sensor is set on the bottom surface of the positioning box to serve as a sensing element that converts physical pressure signals into electrical signals; the pressure spring is located inside the positioning box and connects the pressure sensor and the pressure plate to serve as a force transmission and reset element.

[0014] Preferably, the omnidirectional leak detection device also includes an inflation control module, which serves as an execution unit for gas supply and status locking, and is used to precisely control the inflation and pressure maintenance of the annular rubber airbag.

[0015] The inflation control module includes an inflation column, an inflation spring, a second through slot, an L-shaped pipe, and a first pull plate;

[0016] The gas-generating column is fitted inside the gas-generating cylinder, and its movement is used to compress the gas. The gas-generating spring is located inside the gas-generating cylinder, with its two ends connected to the bottom surface of the cylinder and the gas-generating column, respectively, to provide the gas-generating column with a rebound force. The second through groove is set on the fixed ring, serving as a channel for the L-shaped pipe. One end of the L-shaped pipe is connected to the gas-generating cylinder, and the other end is connected to the outer wall of the annular rubber airbag through the second through groove, so as to transport the gas from the gas-generating cylinder to the annular rubber airbag. The first pull plate is installed at the end of the gas-generating column, serving as an inflation operation handle.

[0017] Furthermore, the inflation control module also includes a brake slot, a brake base, a brake square tube, a brake square rod, a brake cross plate, a brake insert, and a compression spring;

[0018] Brake slots are evenly spaced on the top of the gas-operating square column, serving as piston stroke positioning slots; brake bases are installed on both sides of the gas-operating square cylinder, serving as mounting bases for the braking mechanism; the brake square cylinder is connected to the top of the brake base, serving as a guide cylinder for the brake rod; the brake square rod is slidably connected inside the brake square cylinder, serving as a power transmission rod; the brake cross plate connects all the brake square rods, serving as a linkage plate; the brake insert is installed on the brake cross plate, serving as a locking block inserted into the brake slot to fix the gas-operating square column; the compression spring is located inside the brake square cylinder, with both ends connected to the bottom surface of the cylinder and the brake square rod respectively, serving as an automatic return spring for the brake insert.

[0019] Preferably, the all-around leak detection device also includes an automatic detection module, which includes a ring-shaped rotating track, a rotating block, and a vision sensor;

[0020] The annular rotating track is installed at a fixed position inside the annular rubber airbag and is coaxial with the center of the airbag, serving as an annular motion track; the rotating block is fitted onto the annular rotating track and has a drive source inside, serving as a moving vehicle that rotates along the track; the vision sensor is installed on the rotating block, with its output end facing the inner wall of the annular rubber airbag, serving as an image acquisition unit for automatically identifying abnormal deformations of the inner wall.

[0021] Specifically, the position control unit includes a position cylinder, a position locking hole, a limiting slide post, a second pull plate, a limiting insert post, and a limiting spring;

[0022] The positioning cylinder is connected through the positioning L-block near the detection chamber, serving as a guide rail for the positioning distance control unit. Positioning locking holes are located on the outer wall of the positioning cylinder. Several positioning locking holes are equidistantly arranged, providing a series of discrete, selectable locking positions, allowing the fixing ring and its leak-detecting device to adapt to flange mating points of different positions and sizes. A limiting pin is fixedly connected to the second pull plate, serving as a locking pin for the positioning distance control unit. The second pull plate and two limiting sliding pins are connected through the cylinder on the side away from the positioning cylinder, allowing the user to control the opening and locking of the locking pin. A limiting circular plate is connected to the end of the limiting sliding pin away from the limiting base. The second pull plate and the limiting sliding pin slide together, serving as an auxiliary guide rail for the positioning distance control unit, providing guidance for the locking pin operating mechanism. A limiting spring is fitted on the limiting sliding pin, with one end fixedly connected to the limiting circular plate and the other end fixedly connected to the second pull plate; this serves as a resetter for the positioning distance control unit, providing the power for automatic locking.

[0023] Preferably, the positioning control unit further includes a positioning spring; the positioning spring is sleeved on the positioning cylinder; one end of the positioning spring is fixedly connected to the side wall of the detection cavity, and the other end is fixedly connected to the positioning L block; the movement process of the positioning control unit is smooth and controllable.

[0024] A method for airtightness testing of electrical devices, using the aforementioned airtightness testing device for electrical devices, includes the following steps:

[0025] Connect the testing chamber and the inflation pipeline using a flange;

[0026] The operating position control unit drives the fixed ring to move, so that the annular rubber airbag is aligned with the flange mating point; the annular rubber airbag is inflated by the omnidirectional leak detection device, so that the inner wall of the annular rubber airbag expands and covers the outer periphery of the flange mating point, forming a sealing detection area.

[0027] The all-around leak detection device determines whether there is a leak at the flange joint by detecting the annular rubber airbag; after confirming that there is no leak at the flange joint, test gas is then injected into the detection chamber through the inflation pipeline to test the airtightness of the electrical device itself.

[0028] The beneficial effects of this invention include:

[0029] 1. This invention forms a dynamic sealing detection zone around the flange joint using an annular rubber airbag, effectively capturing and delaying leaking gas, making the leak at the flange joint visible and observable. This design effectively distinguishes flange leaks from leaks in the device itself, fundamentally eliminating interference from pressure changes caused by pipeline connection problems, significantly improving the accuracy and reliability of airtightness detection results, and avoiding misjudgments.

[0030] 2. This invention integrates a dual detection mechanism of pressure-sensing automatic alarm and visual scanning for precise location. Once a leak occurs, the system automatically triggers an alarm and drives the visual sensor to quickly locate the leak point, achieving automated closed-loop detection from 'leak detection' to 'leak location'. This not only significantly shortens investigation time and reduces test gas consumption but also alleviates the workload of personnel. Furthermore, this automated system only activates when a leak occurs, offering advantages such as low energy consumption, minimal wear, and long lifespan.

[0031] 3. Through the cooperation of the position control unit and the position L-block, the stationary ring possesses flexible position adjustment capability and reliable position locking function. This allows the device to quickly adapt to flange mating joints of different positions and sizes, making it highly versatile. Its integrated 'movement-damping-locking' design ensures the smoothness and accuracy of the positioning process, while avoiding interference caused by component displacement during the detection process, thus improving the stability and detection accuracy of the device.

[0032] 4. The inflated annular rubber bladder provides an auxiliary seal internally, effectively reducing the risk of leakage at the flange connection. Externally, its inner wall adheres tightly to both flanges, objectively enhancing the connection rigidity between the testing chamber and the inflation pipeline. This dual function ensures stable and accurate test gas pressure within the testing chamber, providing a reliable pressure benchmark for subsequent airtightness assessment and further improving testing accuracy from the source.

[0033] 5. The inflation control module, through the cooperation of the brake slot and brake block, achieves precise locking of the multi-position inflation column. This allows for precise adjustment of the inflation volume of the annular rubber airbag according to the flange size, avoiding damage to the airbag due to over-inflation or poor sealing due to under-inflation. This design greatly expands the device's adaptability to flanges of different specifications, while ensuring constant and reliable inflation pressure during operation. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the displacement L-block structure of the present invention;

[0036] Figure 3 This is a cross-sectional view of the inflation pipeline of the present invention;

[0037] Figure 4 This is a cross-sectional view of the annular rubber airbag of the present invention;

[0038] Figure 5 This is a schematic diagram of the retaining ring structure of the present invention;

[0039] Figure 6 This is an exploded view of the gas-generating cylinder of the present invention;

[0040] Figure 7 This is a schematic diagram of the second pull plate structure of the present invention;

[0041] Figure 8 This is a cross-sectional view of the braking square tube of the present invention;

[0042] Figure 9 This is a cross-sectional view of the L-shaped pipe of the present invention;

[0043] Figure 10 This is a cross-sectional view of the movable locking hole of the present invention;

[0044] Figure 11 This is a cross-sectional view of the annular rotating track of the present invention;

[0045] In the diagram: 1. Detection chamber; 2. Inflation pipeline; 3. Positioning cylinder; 4. Positioning L-block; 5. Fixed ring; 6. Gas-generating square cylinder; 7. Annular rubber airbag; 8. First through slot; 9. Positioning square box; 10. Pressure square plate; 11. Pressure sensor; 12. Pressure spring; 13. Gas-generating square column; 14. Gas-generating spring; 15. Second through slot; 16. L-shaped pipe; 17. First pull plate; 18. Brake slot; 19. Brake base; 20. Brake square cylinder; 21. Brake square rod; 22. Brake horizontal plate; 23. Brake insert; 24. Compression spring; 25. Positioning spring; 26. Positioning lock hole; 27. Limiting base; 28. Limiting sliding column; 29. ​​Limiting circular plate; 30. Second pull plate; 31. Limiting insert; 32. Annular rotating track; 33. Rotating block; 34. Vision sensor; 35. Limiting spring. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0047] like Figure 1 As shown, the electrical device airtightness testing device includes a testing chamber 1, an inflation pipeline 2, a position control unit, a position L-block 4, a fixed ring 5, an omnidirectional leak detection device, and an annular rubber airbag 7.

[0048] The detection chamber 1 and the inflation pipe 2 are connected by a flange to form a connected air passage, such as... Figure 3 As shown.

[0049] A position control unit is installed on the side wall of the detection chamber 1, on the same side as the flange of the detection chamber 1, providing lockable linear displacement. The position control unit, as a movement-locking mechanism, mainly consists of a position-adjusting cylinder 3 with position adjustment and positioning functions. Through a simple mechanical structure, it realizes the position adjustment and precise positioning of the fixed ring, which serves as the detection platform, thereby meeting the needs of detecting flanges in different positions.

[0050] Positioning block 4 serves as the connecting arm, such as Figure 2 As shown, the movable cylinder and the movable L-block slide together, converting the user's thrust into linear motion of the detection platform. One end of the movable L-block 4 slides with the movable cylinder 3 of the movable distance control unit, while the other end is fixedly connected to the stationary ring 5. This precisely transmits the displacement generated by the movable distance control unit to the stationary ring 5, as shown. Figure 5 As shown.

[0051] The fixed ring 5 serves as a platform for the load-bearing detection device, on which omnidirectional leak detection devices are installed to cover the flange mating joint after positioning. For example... Figure 5 As shown, several movable L-blocks 4 are connected together to the side of the fixed ring 5; the fixed ring 5 is sleeved on the air-filling pipeline 2 and is coaxial with the center of the flange; the inner diameter of the fixed ring 5 is larger than the outer diameter of the flange.

[0052] The all-around leak detection device uses a gas-generating cylinder 6 as its main structure. The gas-generating cylinder 6 inflates the annular rubber airbag 7, causing its inner wall to expand and tightly wrap around the flange joint, forming an auxiliary sealing and detection zone. Figure 6 As shown, leak detection is performed on the annular rubber airbag to determine whether a leak exists and its specific location.

[0053] The annular rubber airbag 7 integrates dynamic sealing and deformation indication functions, with its outer wall fixedly connected to the inner wall of the retaining ring 5; the outer wall of the flange mating joint is located within the movement path range of the inner wall of the annular rubber airbag 7, such as... Figure 4 As shown, it transforms invisible gas leaks into visible and measurable inner wall deformation by forming a sealed detection zone outside the flange: through inflation, its inner wall tightly wraps around the flange joint between the detection chamber and the inflation pipeline, improving the sealing of the flange joint. As a medium for leak detection, once there is a leak at the flange joint, the gas trapped in the annular rubber bladder will act on the inner wall of the bladder due to the increased pressure, causing local deformation or bulging of the inner wall at the location corresponding to the leak point.

[0054] The position control unit includes core components such as position cylinder 3, position locking hole 26, limit sliding column 28, second pull plate 30, limit insertion column 31 and limit spring 35, as well as position spring 25 as an optimization component to improve the operating experience, and limit base 27 and limit circular plate 29 as auxiliary components.

[0055] Specifically, in the position control unit:

[0056] The positioning cylinder 3 is connected through the positioning block 4 on the side near the detection cavity 1; as a guide rail for the positioning control unit, it provides a precise path and direction for movement.

[0057] Positioning lock hole 26 Figure 10 As shown, a plurality of positioning locking holes 26 are arranged equidistantly on the outer wall of the positioning cylinder 3; as a positioner of the positioning control unit, it provides a series of discrete, selectable locking positions, which can be locked in different positions, so that the fixed ring 5 and the leak detection device on it can adapt to flange mating joints of different positions and sizes.

[0058] The limiting pin 31 is fixedly connected to the second pull plate 30; when the fixed ring 5 does not need to move, the limiting pin 31 passes through the moving block 4 away from the moving cylinder 3 and is connected to one of the moving locking holes 26; as the locking pin of the moving distance control unit, it is inserted into the moving locking hole to achieve mechanical locking and prevent movement.

[0059] Second pull plate 30 Figure 7 As shown, two limiting sliding pins 28 are connected through the second pull plate 30 on the side away from the positioning cylinder 3; as the operator of the positioning control unit, the user controls the opening and locking of the locking pin through it.

[0060] The end of the limiting slide column 28 away from the limiting base 27 is connected to the limiting circular plate 29, and the second pull plate 30 and the limiting slide column 28 are in sliding engagement; as an auxiliary guide rail of the position control unit, it provides guidance for the locking pin operating mechanism. A limiting spring 35 is sleeved on the limiting slide column 28.

[0061] One end of the limiting spring 35 is fixedly connected to the limiting circular plate 29, and the other end is fixedly connected to the second pull plate 30; as the resetter of the position control unit, it provides the power for automatic locking and ensures the reliability of the locking function.

[0062] Positioning spring 25 is sleeved on positioning cylinder 3; one end of positioning spring 25 is fixedly connected to the side wall of detection cavity 1, and the other end is fixedly connected to positioning L block 4; as a damper of positioning distance control unit, it makes the movement process smooth and controllable.

[0063] The limiting base 27 is installed on both sides of the positioning L-block 4; the limiting base 27 is fixedly connected to the limiting slide column 28 on the side away from the flange; since the core action of the locking function of the positioning control unit is to insert or disengage the limiting column into the positioning lock hole, it is technically possible to achieve this without the limiting base. For example, the base for fixing the limiting slide column 28 and the positioning L-block 4 can be designed as a single part, thus eliminating the need for the separate limiting base 27.

[0064] The limiting circular plate 29 is fixed to the end of the limiting slide column 28 as a safety limiting component to prevent the second pull plate 30 from falling off the slide column. It is an auxiliary component that ensures the integrity of the mechanism.

[0065] The position control unit achieves smooth movement and precise positioning of the stationary ring 5 through the precise cooperation between core components, and improves the overall reliability and user experience through optimization and auxiliary components.

[0066] In addition to the core gas-generating cylinder 6, the all-around leak detection device also includes a pressure regulating and positioning module, an inflation control module, and an automatic detection module, such as... Figure 8 As shown.

[0067] The pressure regulating and positioning module is the pressure sensing and primary alarm unit of the device, used to monitor pressure changes in the sealing area in real time and issue an alarm when a leak occurs. It includes a first through groove 8, a positioning box 9, a pressure plate 10, a pressure sensor 11, and a pressure spring 12. When a leak occurs at the flange connection, the leaking gas causes local deformation of the inner wall of the annular rubber airbag 7, resulting in a change in its internal pressure. This change is sensed by the pressure sensor 11 and triggers an alarm.

[0068] The inflation control module is the execution unit for gas supply and status locking of the device. It is used to precisely control the inflation and pressure holding of the annular rubber airbag 7. It includes an inflation control column 13, an inflation control spring 14, a second through groove 15, an L-shaped pipe 16, a first pull plate 17, a brake slot 18, a brake base 19, a brake cylinder 20, a brake rod 21, a brake cross plate 22, a brake insert 23, and a compression spring 24.

[0069] The automatic detection module is the system's leak-precision location unit. It is activated after the pressure regulating and positioning module detects a leak, and is used to automatically identify and report the specific location of the leak, such as... Figure 9 , Figure 11 As shown, it includes an annular rotating track 32, a rotating block 33, and a vision sensor 34. When a leak occurs at the flange connection, the rotating block 33 is activated to drive the vision sensor 34 to rotate along the annular rotating track 32, automatically scanning and locating the deformed protrusions on the inner wall of the annular rubber airbag 7, thereby achieving accurate judgment of the leak point.

[0070] Specifically, in the voltage regulation positioning module:

[0071] The first through groove 8 is set on the fixing ring 5 as an installation channel to provide a fixed position for the positioning box 9.

[0072] The positioning box 9 is fixed in the first through groove 8 and communicates with the inside of the annular rubber airbag 7, serving as the pressure sensing chamber of the module.

[0073] The pressure plate 10 is fitted into the opening of the positioning box 9 and serves as a pressure sensing surface to directly sense the air pressure changes inside the annular rubber airbag 7.

[0074] Pressure sensor 11 is located on the bottom surface of the positioning box 9. As the core sensing element, it is used to convert physical pressure signals into electrical signals.

[0075] The pressure spring 12 is located inside the positioning box 9 and connects the pressure sensor 11 and the pressure plate 10. It serves as a force transmission and reset element, ensuring sensitivity while preventing the pressure plate 10 from moving excessively.

[0076] Working principle of the pressure regulating and positioning module: When a leak occurs at the flange connection, the leaking gas causes the pressure inside the annular rubber airbag 7 to increase. The internal gas pushes the pressure plate 10 to move within the positioning box 9, compressing the pressure spring 12. The pressure generated by this deformation is captured in real time by the pressure sensor 11 and immediately sent to the controller to trigger an audible and visual alarm, thus achieving a preliminary judgment of the leak.

[0077] Specifically, in the inflation control module:

[0078] The gas-generating column 13 is fitted inside the gas-generating cylinder 6 and acts as a piston, its movement being used to compress the gas.

[0079] The gas-controlling spring 14 is located inside the gas-controlling square cylinder 6, with its two ends connected to the bottom surface of the cylinder and the gas-controlling square column 13, respectively. As a return spring, it provides a restoring force to the gas-controlling square column 13.

[0080] The second through groove 15 is provided on the fixed ring 5 as a pipeline channel.

[0081] One end of the L-shaped pipe 16 is connected to the gas-generating cylinder 6, and the other end is connected to the outer wall of the annular rubber airbag 7 through the second through groove 15, serving as a gas delivery channel to transport gas from the gas-generating cylinder 6 to the annular rubber airbag 7. Figure 9 As shown.

[0082] The first pull plate 17 is installed at the end of the gas-generating column 13 and serves as the inflation operation handle.

[0083] Brake slots 18 are equidistantly arranged on the top of the air-braking square column 13, serving as piston stroke positioning slots.

[0084] The brake base 19 is installed on both sides of the gas-generating cylinder 6, serving as the mounting base for the brake mechanism.

[0085] The brake square tube 20 is connected to the top of the brake base 19 and serves as a guide tube for the brake lever.

[0086] The brake rod 21 is slidably connected inside the brake cylinder 20, serving as a power transmission rod.

[0087] The brake cross plate 22 connects all the brake square rods 21, serving as a linkage plate.

[0088] Brake insert 23 is installed on brake cross plate 22 as a locking block and can be inserted into brake slot 18 to fix air-braking column 13.

[0089] The compression spring 24 is located inside the brake square cylinder 20, with its two ends connected to the bottom surface of the cylinder and the brake square rod 21, respectively, serving as the automatic reset spring for the brake plug 23.

[0090] Specifically, in the automatic detection module:

[0091] The annular rotating track 32 is fixedly installed in a fixed position inside the annular rubber airbag 7 and is coaxial with the center of the airbag, serving as an annular motion track.

[0092] The rotating block 33 is fitted onto the annular rotating track 32, and has a drive source inside, serving as a mobile carrier that can rotate along the track.

[0093] The visual sensor 34 is mounted on the rotating block 33, with its output end facing the inner wall of the annular rubber airbag 7. It serves as an image acquisition unit for automatically identifying abnormal deformations of the inner wall.

[0094] The automatic detection module works as follows: When the pressure sensor 11 of the pressure regulating and positioning module triggers an alarm, the controller synchronously sends a signal to the drive source inside the rotating block 33, initiating its rotation along the annular track 32. The vision sensor 34 then continuously scans the entire inner wall of the annular rubber airbag 7. Since a local bulge will appear on the inner wall corresponding to the leak point, the vision sensor 34 will capture this characteristic image and inform the staff of the precise location of the leak in real time through the controller, realizing automated closed-loop detection from leak detection to leak point location.

[0095] After the detection chamber 1 and the inflation pipe 2 are connected by a flange, test gas can be introduced into the detection chamber 1 through the inflation pipe 2 to test the airtightness of electrical components. During this process, by pulling the second pull plate 30 upward, it moves to the upper limit of the limiting slide 28, so that the limiting spring 35 is in a buffer state. Then, the limiting insert 31 on the second pull plate 30 disengages from the positioning L block 4 and is no longer connected to the positioning lock hole 26. At this time, the limiting setting of the positioning L block 4 is released, so that it can be moved to the positioning cylinder 3 by moving the positioning L block 4, thereby driving the solid... The movement of the positioning ring 5 causes the positioning spring 25 to be in a buffered state. The damping provided by the spring controls the movement speed of the positioning ring 5, preventing excessive force from causing it to move too quickly and making it difficult to control its precise position. This improves the movement accuracy of the positioning ring 5. Simultaneously, by controlling the position of the positioning ring 5, it is moved to the flange mating gap, allowing its initial position to rest beside the side wall of the testing chamber 1. This avoids obstructing the operator's connection and fixing operations between the testing chamber 1 and the flange on the inflation pipe 2. After the flange is mated, the connection can be made... The retaining ring 5 is moved to the flange joint gap. The annular rubber airbag 7 on the omnidirectional leak detection device can be used to determine whether there is a leak at the flange joint and to improve the sealing performance of the flange joint. Simultaneously, after the retaining ring 5 moves to the flange joint, the second pull plate 30 is released. The reset of the limit spring 35 drives the limit pin 31 to reset and move, allowing it to pass through the positioning L block 4 and connect with one of the positioning locking holes 26. This limits the positioning L block 4, fixing the retaining ring 5 in its current position for use, preventing damage to the retaining ring 5 due to improper handling. Factors causing dislocation or displacement can affect the effectiveness of the omnidirectional leak detection device at the flange joint. This improves the stability of the retaining ring 5 during use, further enhancing the effectiveness of the omnidirectional leak detection device and improving the detection effect and accuracy of the device. It is worth mentioning that because the number of positioning locking holes 26 is set and they are evenly arranged, the retaining ring 5 can be used in different positions, allowing the omnidirectional leak detection device to be used at flange joints in different locations, thereby further reducing the limitations of the device during use.

[0096] In this embodiment, the fixed ring 5 is equipped with an omnidirectional leak detection device for detecting air leakage at the flange connection. The omnidirectional leak detection device includes a gas-generating cylinder 6 connected to the outer wall of the fixed ring 5; a gas-generating column 13 fitted into the gas-generating cylinder 6, with the two slidingly engaged; a gas-generating spring 14 located inside the gas-generating cylinder 6; one end of the gas-generating spring 14 is fixedly connected to the inner bottom surface of the gas-generating cylinder 6, and the other end is fixedly connected to the gas-generating column 13; a second through groove 15, extending to the outer wall of the fixed ring 5 on one side and to the inner wall of the fixed ring 5 on the other side; an L-shaped pipe 16, one end connected to the gas-generating cylinder 6, and the other end connected to the outer wall of the annular rubber airbag 7 through the second through groove 15; the gas-generating cylinder 6 communicates with the annular rubber airbag 7 through the L-shaped pipe 16; and a first pull plate 17 installed on... Gas-control column 13 is located away from the gas-control cylinder 6 at one end; a through brake slot 18 is provided at the top of the gas-control column 13, and several brake slots 18 are arranged at equal intervals; a brake base 19 is installed on both sides of the gas-control cylinder 6; a brake cylinder 20 is connected to the top of the brake base 19; a brake rod 21 is slidably connected inside the brake cylinder 20, and several brake rods 21 are connected to a brake cross plate 22, which is located at the top of the gas-control cylinder 6; a brake insert 23 is installed on the brake cross plate 22; after the gas-control column 13 is limited, the brake insert 23 passes through the top of the gas-control cylinder 6 and is connected to one of the brake slots 18; a compression spring 24 is located inside the brake cylinder 20; one end of the compression spring 24 is fixedly connected to the bottom surface inside the brake cylinder 20, and the other end is fixedly connected to the brake rod 21;

[0097] When the position of the fixed ring 5 is adjusted to the gap between the flange on the detection chamber 1 and the inflation pipe 2 by the positioning control unit, the gas-generating column 13 is pushed towards the fixed ring 5, causing it to move within the gas-generating cylinder 6, thus placing the gas-generating spring 14 in a buffer state. The movement of the gas-generating column 13 compresses the internal space of the gas-generating cylinder 6, allowing the gas inside to enter the annular rubber bladder 7 through the L-shaped pipe 16. The annular rubber bladder 7 gradually expands under the action of the incoming gas. Since the outer wall of the annular rubber bladder 7 is fixed to the inner wall of the fixed ring 5, the annular rubber bladder 7 can only expand internally and expand towards the outer wall at the flange connection. When the annular rubber bladder 7 is filled with gas from the gas-generating cylinder 6, the annular rubber... The inner wall of the airbag 7 is in contact with the outer wall of the flange joint. Since both are circular, they limit the circular gap at the flange joint, effectively sealing it completely. This prevents leakage at the flange joint when the inflation pipe 2 fills the detection chamber 1 with detection gas, thus improving the sealing performance when the detection chamber 1 and the inflation pipe 2 are connected. Simultaneously, after the annular rubber airbag 7 limits and seals the flange joint of the detection chamber 1 and the inflation pipe 2, the inner wall of the annular rubber airbag 7 also contacts the outer wall of both flanges, increasing the connection strength between the detection chamber 1 and the inflation pipe 2. This results in a better connection when they are connected via the flange joint, preventing leakage when the inflation pipe 2 fills the detection chamber 1 with detection gas. When the detection gas is introduced, the amount of detection gas entering the detection chamber 1 is reduced due to leakage at the connection point between the two components. This prevents the actual gas pressure in the detection chamber 1 from falling below the predetermined pressure, further avoiding misjudgments in the airtightness testing of electrical components, thus preventing the detection results from becoming completely invalid or even leading to a reverse misjudgment of "whether the component is leaking or not." This improves the sealing performance of the connection between the detection chamber 1 and the inflation pipe 2, while also improving the detection accuracy of the device, thereby enhancing its effectiveness. It is worth mentioning that when the inner wall of the annular rubber airbag 7 limits and seals the gap at the flange connection point between the detection chamber 1 and the inflation pipe 2, if a gap occurs at the connection point due to non-human factors, allowing the gas transported in the detection chamber 1 and the inflation pipe 2 to escape, When the gas escapes, the squeezed gas acts on the inner wall of the annular rubber bladder 7, causing deformation of the inner wall. By observing the deformation and specific location of the annular rubber bladder 7, the staff can determine the leakage phenomenon and specific location of the flange joint. This allows the staff to deal with the gas leakage at the flange joint in a timely manner, and avoid the gas leakage caused by the gas pipeline 2 when delivering test gas into the detection chamber 1, which would affect the accuracy of the device's airtightness detection. By sealing the flange joint with the annular rubber bladder 7, the above-mentioned gas leakage rate can be avoided, so that the device can determine whether there is a leak at the flange joint during actual use. At the same time, when a leak occurs, it can also reduce the gas leakage rate.This allows the device to avoid detecting pressure changes at the connection point during testing, and to analyze whether the pressure drop in the testing chamber 1 is caused by leakage in the electrical components themselves or by leakage during gas supply. This eliminates the influence of such interference on the airtightness testing of electrical components, avoids misjudgment of test results, and ultimately improves the airtightness testing accuracy of the device and reduces its application limitations.

[0098] It is worth mentioning that when it is necessary to move the gas-operating column 13 to discharge the gas in the gas-operating cylinder 6 into the annular rubber airbag 7, by pulling the brake plate 22 upward, the brake rod 21 on it moves within the brake cylinder 20, causing the compression spring 24 to be in a buffer state. This causes the brake block 23 on the brake plate 22 to disengage from the top of the gas-operating cylinder 6 and no longer connect to the brake slot 18, thus releasing the limiting setting on the gas-operating column 13 and allowing it to move freely to control the amount input into the annular rubber airbag 7. When the annular rubber airbag 7 is full of gas and the movement of the gas-operating column 13 is no longer needed, the brake plate 22 is released. The reset of the compression spring 24 causes the brake block 23 on the brake plate 22 to reset and move, passing through the top of the gas-operating cylinder 6 and connecting to one of the brake slots 18, thus limiting the gas-operating column 13 to its current position and preventing it from being used... The movement caused by non-human factors affects the use of the annular rubber airbag 7, improving its performance and sealing effect at the flange joint. Simultaneously, since the brake slots 18 on the gas-operating column 13 are arranged in several equidistant positions, the gas-operating column 13 can be positioned at different locations to accommodate the inflation volume of the annular rubber airbag 7 under different usage conditions. This prevents damage to the inner wall of the annular rubber airbag 7 due to excessive gas inflation when used with flanges of excessive diameter, thus further reducing the limitations of the device in use. Furthermore, when the gas-operating column 13 is positioned, the gas-operating spring 14, which is in a buffer state, cannot return to its original position. The resulting elastic force acts on the gas-operating column 13, further increasing the contact strength and friction between the brake slot 18 and the brake block 23, preventing the brake block 23 from dislodging due to non-human factors, and further improving the detection effect of the device.

[0099] In this embodiment, the gas-generating cylinder 6 is equipped with a pressure regulating and positioning module for locating the specific leak location at the flange connection. The pressure regulating and positioning module includes a first through groove 8, which is disposed on the fixing ring 5. One side of the first through groove 8 extends to the outer wall of the fixing ring 5, and the other side extends to the inner wall of the fixing ring 5. A positioning box 9 is fixedly connected to the side of the gas-generating cylinder 6 near the fixing ring 5. The positioning box 9 is located inside the first through groove 8, and the two are fitted together. The opening of the positioning box 9 is away from the direction of the gas-generating cylinder 6 and is located inside the annular rubber airbag 7. The positioning box 9 and the annular rubber airbag 7 are connected. A pressure plate 10 is fitted together inside the opening of the positioning box 9, and the two are slidably engaged. A pressure sensor 11 is disposed on the bottom surface inside the positioning box 9. A pressure spring is also included. 12, located inside the positioning box 9; one end of the pressure spring 12 is fixedly connected to the pressure sensor 11, and the other end is fixedly connected to the pressure plate 10; after the annular rubber airbag 7 is filled with gas, its inner wall contacts the outer wall of the flange mating point; since the outer wall of the annular rubber airbag 7 is fixed to the inner wall of the fixing ring 5, its outer wall position remains fixed, and only the inner wall can deform with inflation; at the fixed position inside the annular rubber airbag 7, an annular rotating rail 32 is also installed, and the annular rotating rail 32 and the annular rubber airbag 7 are coaxial; a rotating block 33 is fitted onto the annular rotating rail 32, and the two rotate in coordination; a drive source is provided inside the rotating block 33; a vision sensor 34 is installed on the rotating block 33, and its output end faces the inner wall of the annular rubber airbag 7;

[0100] When the gas-generating cylinder 6 on the omnidirectional leak detection device inflates the annular rubber airbag 7, the gas entering the annular rubber airbag 7 also enters through the opening of the positioning box 9 and acts on the pressure plate 10. As the air pressure inside the annular rubber airbag 7 gradually increases, the force acting on the pressure plate 10 also gradually increases, causing it to move within the positioning box 9, thus keeping the pressure spring 12 in a buffered state. When the annular rubber airbag 7 is full of gas, the pressure plate 10 no longer moves, allowing the pressure spring 12 to maintain its current deformation strength, thus maintaining the pressure inside the positioning box 9. Sensor 11 records the deformation intensity of the pressure spring 12 at this moment. If the all-around leak detection device determines that there is a leak at the flange joint, the gas acts on the inner wall of the annular rubber airbag 7, causing it to deform and compress its internal space. The pressure inside the annular rubber airbag 7 increases, allowing the gas inside the annular rubber airbag 7 to further enter the positioning box 9 and act on the pressure plate 10, further limiting its movement within the positioning box 9. This causes the pressure spring 12 to deform further. The deformation is captured by the pressure sensor 11 and the signal is transmitted to the controller, which then issues an alarm signal to alert the user. The staff will promptly handle any gas leaks occurring at the flange connection point. Simultaneously, the control center will send a signal to the signal source within the rotating block 33, causing it to rotate at its upper limit on the annular track 32. This will drive the vision sensor 34 to rotate within the annular rubber airbag 7 and around its inner wall. This sensor automatically detects any protrusions on the inner wall of the annular rubber airbag 7. Because the inner wall of the annular rubber airbag 7 will appear convex after impact, once the specific deformation location is found, the signal will be transmitted to the controller to inform the staff of the exact location of the leak. This further improves the speed of leak detection, avoiding excessively slow speeds that could lead to serious gas leaks. It also reduces the workload of staff when manually checking for leaks, thus enhancing the device's effectiveness. Furthermore, the above description prevents the rotating block 33 from being constantly in a rotating state, reducing energy consumption for both the rotating block 33 and the vision sensor 34. It also prevents both from working continuously when no leaks are detected, thus avoiding severe wear and tear and extending the lifespan of both the vision sensor 34 and the rotating block 33. This reduces the limitations of the device during use.

[0101] The present invention also provides a method for airtightness testing of electrical devices, comprising the following steps:

[0102] S1. After connecting the detection chamber 1 and the gas filling pipeline 2 through the flange, the test gas can be introduced into the detection chamber 1 through the gas filling pipeline 2 to test the air tightness of the electrical device.

[0103] S2. Operate the omnidirectional leak detection device to detect whether there is any air leakage at the flange joint and to determine the location of the leak.

[0104] S3. By using the position control unit to adjust the position of the fixed ring 5, the omnidirectional leak detection device on the fixed ring 5 can be used at the flange mating points at different locations.

[0105] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0106] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An airtightness testing device for electrical components, comprising a testing chamber and an inflation pipeline, both connected by a flange to form a connected air passage; characterized in that... It also includes a position control unit, a position L-block, a fixed ring, an omnidirectional leak detection device, and an annular rubber airbag; The position control unit is installed on the detection cavity to provide lockable linear displacement; One end of the displacement L-block is slidably connected to the displacement control unit as a connecting arm; the other end is fixedly connected to the stationary ring to transmit the displacement generated by the displacement control unit to the stationary ring. The locating ring is fitted onto the inflation pipeline and is coaxial with the center of the flange; the inner diameter of the locating ring is larger than the outer diameter of the flange; the positioning control unit is driven by the positioning L-block to move axially along the inflation pipeline, serving as a platform for the bearing detection device, on which an all-around leak detection device is installed to cover the flange mating joint after positioning. The omnidirectional leak detection device is set on the outer wall of the fixed ring, including the gas supply cylinder; the gas supply cylinder inflates the annular rubber airbag, causing the inner wall of the annular rubber airbag to expand and tightly wrap around the outer periphery of the flange joint, thereby detecting the leak and the location of the leak in the annular rubber airbag. The outer wall of the annular rubber airbag is fixedly connected to the inner wall of the stationary ring; the outer wall of the flange mating point is located within the movement path of the inner wall of the annular rubber airbag. By forming a sealing detection area outside the flange, the invisible gas leakage is transformed into visible and measurable inner wall deformation. The all-around leak detection device also includes an automatic detection module, which includes a ring-shaped rotating track, a rotating block, and a vision sensor. The annular rotating track is installed at a fixed position inside the annular rubber airbag and is coaxial with the center of the airbag, serving as an annular motion track; the rotating block is fitted onto the annular rotating track and has a drive source inside, serving as a moving vehicle that rotates along the track; the vision sensor is installed on the rotating block, with its output end facing the inner wall of the annular rubber airbag, serving as an image acquisition unit for automatically identifying abnormal deformations of the inner wall.

2. The apparatus as described in claim 1, characterized in that, The all-around leak detection device also includes a pressure regulating and positioning module, which is used to monitor pressure changes in the sealing area in real time and issue an alarm when a leak occurs.

3. The apparatus as described in claim 2, characterized in that, The pressure regulating and positioning module includes a first through slot, a positioning box, a pressure plate, a pressure sensor, and a pressure spring; The first through slot is set on the fixing ring to provide a fixed position for the positioning box; the positioning box is fixed in the first through slot and communicates with the inside of the annular rubber airbag, serving as the pressure sensing chamber of the module; the pressure plate is fitted and connected to the opening of the positioning box to directly sense the air pressure changes inside the annular rubber airbag; the pressure sensor is set on the bottom surface of the positioning box to serve as a sensing element that converts physical pressure signals into electrical signals; the pressure spring is located inside the positioning box and connects the pressure sensor and the pressure plate to serve as a force transmission and reset element.

4. The apparatus as described in claim 1, characterized in that, The all-around leak detection device also includes an inflation control module, which serves as the execution unit for gas supply and status locking, and is used to precisely control the inflation and pressure maintenance of the annular rubber airbag.

5. The apparatus as described in claim 4, characterized in that, The inflation control module includes an inflation column, an inflation spring, a second through slot, an L-shaped pipe, and a first pull plate; The gas-generating column is fitted inside the gas-generating cylinder, and its movement is used to compress the gas. The gas-generating spring is located inside the gas-generating cylinder, with its two ends connected to the bottom surface of the cylinder and the gas-generating column, respectively, to provide the gas-generating column with a rebound force. The second through groove is set on the fixed ring, serving as a channel for the L-shaped pipe. One end of the L-shaped pipe is connected to the gas-generating cylinder, and the other end is connected to the outer wall of the annular rubber airbag through the second through groove, so as to transport the gas from the gas-generating cylinder to the annular rubber airbag. The first pull plate is installed at the end of the gas-generating column, serving as an inflation operation handle.

6. The apparatus as described in claim 5, characterized in that, The inflation control module also includes a brake slot, a brake base, a brake square tube, a brake square rod, a brake cross plate, a brake insert, and a compression spring; Brake slots are evenly spaced on the top of the gas-operating square column, serving as piston stroke positioning slots; brake bases are installed on both sides of the gas-operating square cylinder, serving as mounting bases for the braking mechanism; the brake square cylinder is connected to the top of the brake base, serving as a guide cylinder for the brake rod; the brake rod is slidably connected inside the brake square cylinder, serving as a power transmission rod; the brake cross plate connects all the brake rods, serving as a linkage plate; the brake insert is installed on the brake cross plate, serving as a locking block inserted into the brake slot to fix the gas-operating square column; the compression spring is located inside the brake square cylinder, with both ends connected to the bottom surface of the cylinder and the brake rod respectively, serving as an automatic return spring for the brake insert.

7. The apparatus as claimed in claim 1, characterized in that, The position control unit includes a position cylinder, a position locking hole, a limiting slide post, a second pull plate, a limiting insert post, and a limiting spring; The positioning cylinder is connected through the positioning L-block near the detection chamber, serving as a guide rail for the positioning distance control unit. Positioning locking holes are located on the outer wall of the positioning cylinder. Several positioning locking holes are equidistantly arranged, providing a series of discrete, selectable locking positions, allowing the fixed ring and its leak-detecting device to adapt to flange mating points of different positions and sizes. A limiting pin is fixedly connected to the second pull plate, serving as a locking pin for the positioning distance control unit. The second pull plate and two limiting sliding pins are connected through the cylinder on the side away from the positioning cylinder, allowing the user to control the opening and locking of the locking pin via the second pull plate. A limiting plate is connected to the end of the limiting sliding pin away from the limiting base. The second pull plate and the limiting sliding pin slide together, serving as an auxiliary guide rail for the positioning distance control unit, providing guidance for the locking pin operating mechanism. A limiting spring is fitted on the limiting sliding pin, with one end fixedly connected to the limiting plate and the other end fixedly connected to the second pull plate, acting as a resetter for the positioning distance control unit, providing the power for automatic locking.

8. The apparatus as claimed in claim 7, characterized in that, The positioning control unit also includes a positioning spring; the positioning spring is sleeved on the positioning cylinder; one end of the positioning spring is fixedly connected to the side wall of the detection cavity, and the other end is fixedly connected to the positioning L block; the movement process of the positioning control unit is smooth and controllable.

9. A method for airtightness testing of electrical components, using the airtightness testing device for electrical components as described in any one of claims 1 to 8, characterized in that, Including the following steps: Connect the testing chamber and the inflation pipeline using a flange; The operation position control unit drives the fixed ring to move, so that the annular rubber airbag is aligned with the flange mating point; An omnidirectional leak detection device is used to inflate the annular rubber airbag, causing the inner wall of the annular rubber airbag to expand and cover the periphery of the flange mating area, forming a sealing detection zone. The all-around leak detection device determines whether there is a leak at the flange joint by detecting the annular rubber airbag; After confirming that there is no leakage at the flange connection, test gas is then introduced into the test chamber through the gas filling pipeline to test the air tightness of the electrical components themselves.

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