Inspection equipment of pressure relief valve for dry-type capacitor

Abstract

The utility model discloses an inspection device of a pressure relief valve for a dry-type capacitor, the inspection device of the pressure relief valve for the dry-type capacitor comprises a support part, a bearing device and a pressure relief valve, the support part comprises an alignment device, a synchronization device and a transmission device, the alignment device comprises an alignment pipeline, a contact arc plate, a first piston rod, a second piston rod, an L-shaped air cylinder, a guide cross rod, an extension support and an air tightness tester, and the synchronization device comprises a movable clamping key, a second spring, a photoelectric sensor, a positioning vertical frame, a connecting rope, an extension front frame, a contact pressing plate and an L-shaped alignment plate. The transmission device comprises a supporting frame, a first portal frame, a lead screw, a wire wheel, a driving motor, a second portal frame, a second rack, a gear, a connecting bottom frame, a guide extension rod and a positioning base frame. The bearing device comprises a connecting front frame, a first rack, a first vertical plate, a contact bottom plate, a first spring, a second vertical plate, a supporting plate and a guide rod. The capacitor is convenient to use, and can meet the requirements of long-term safe, stable and reliable work of the capacitor under high and low temperature environment conditions.

Description

Technical Field

[0001] This utility model belongs to the field of capacitor testing technology, specifically relating to a testing device for a pressure relief valve for dry capacitors. Background Technology

[0002] DC support capacitors are key components of converters, primarily serving functions such as voltage stabilization and filtering. Currently, dry-type DC support capacitors are widely used in new energy, rail transit, and smart grid fields. These capacitors share common characteristics such as dry structure, high voltage, and large capacitance. When an internal fault occurs in the capacitor (such as inter-electrode short circuit or overvoltage), the internal pressure will rise sharply. If not released in time, it may cause the capacitor to burst, leading to a safety accident. As a key safety device for dry-type capacitors, the pressure relief valve can quickly open when the pressure exceeds a set threshold, releasing the internal pressure and protecting the capacitor body and surrounding equipment.

[0003] Traditional pressure relief valve testing equipment mainly relies on static pressure calibration methods, using pressure gauges, converters, and other equipment for calibration. However, this method has significant limitations: First, traditional equipment often uses a single pressure tank design, requiring the establishment of a complex correction coefficient database to accommodate pressure relief valves of different models and manufacturers, resulting in poor test adaptability. Second, static pressure calibration cannot simulate the sudden pressure change scenario inside a capacitor, while the actual operation of a pressure relief valve exists in the form of bursting or sudden change, and traditional pressure acquisition methods under steady-state conditions cannot accurately capture its dynamic action characteristics. In addition, existing equipment has a low degree of automation, relies on manual operation, is inefficient, and is prone to introducing errors. Some equipment even has mechanical errors such as "false oil level," which seriously affects the accuracy of the test results.

[0004] Currently, most testing equipment for pressure relief valves used in dry-type capacitors relies on manual processing, making it impossible to perform fully automated testing and production. Furthermore, sealing the pressure relief valve with the testing equipment requires the use of various auxiliary devices, and the sealing effect is not ideal. Therefore, there is an urgent need to design testing equipment and methods for pressure relief valves used in dry-type capacitors to solve the above problems. Summary of the Invention

[0005] In order to overcome the shortcomings of existing testing equipment technology, this utility model proposes a testing device for pressure relief valves for dry capacitors.

[0006] The technical solution adopted in this utility model is as follows.

[0007] This utility model provides an inspection device for a pressure relief valve used in dry-type capacitors, mainly composed of a support component, a bearing device, and a pressure relief valve. The support component includes an alignment device, a synchronization device, and a transmission device. The alignment device includes an alignment pipe, a contact arc plate, a first piston rod, a second piston rod, an L-shaped air cylinder, a guide crossbar, an extension bracket, and an airtightness tester. The synchronization device includes a movable latch, a second spring, a photoelectric sensor, a positioning vertical frame, a connecting rope, an extension front frame, a contact pressure plate, and an L-shaped alignment plate. The transmission device includes a support frame, a first gantry frame, a lead screw, a reel, a drive motor, a second gantry frame, a second rack, a gear, a connecting base frame, a guide extension rod, and a positioning base frame. The bearing device includes a connecting front frame, a first rack, a first vertical plate, a contact base plate, a first spring, a second vertical plate, a support plate, and a guide rod. The bearing device is slidably mounted on the top rear end of the support component, and the pressure relief valve is placed on the top of the bearing device.

[0008] The alignment device of the support component is fixedly installed inside the front end of the transmission device, and the synchronization device is symmetrically fixedly installed at the top of the alignment device. The photoelectric sensor is fixedly installed on the side end of the positioning frame, the second spring is fixedly installed inside the bottom end of the positioning frame, the movable locking key is fixedly installed at the top of the second spring, the L-shaped alignment plate is fixedly installed at the end of the movable locking key away from the photoelectric sensor, the extension front frame is fixedly installed at the front end of the movable locking key away from the L-shaped alignment plate, the connecting rope is fixedly installed at the bottom front end of the extension front frame, and the contact pressure plate is fixedly installed at the bottom center of the extension front frame.

[0009] The second vertical plate of the bearing device is symmetrically fixedly installed at the top of the support plate. The guide rod is slidably inserted into the inner center of the second vertical plate. The first vertical plate is fixedly installed at the front center of the guide rod. The connecting front frame is fixedly installed at the bottom of the first vertical plate. The first rack is symmetrically fixedly installed at the front end of the connecting front frame. The first spring is fixedly installed between the first vertical plate and the second vertical plate, and the first spring is located on the outer ring of the guide rod. The contact bottom plate is fixedly installed at the bottom front end of the support plate.

[0010] The extension bracket is fixedly installed at both ends of the air tightness tester. The L-shaped air cylinder is fixedly installed inside the extension bracket away from the air tightness tester. The first piston rod is slidably inserted into the bottom end of the L-shaped air cylinder. The contact arc plate is fixedly installed on the end of the first piston rod away from the L-shaped air cylinder. The second piston rod is slidably inserted into the top end of the L-shaped air cylinder. The alignment pipe is fixedly installed at the rear center of the air tightness tester. The guide crossbar symmetrically slides through the extension bracket and connects with the contact arc plate.

[0011] The first gantry frame is fixedly installed at the top rear end of the support frame, the second gantry frame is fixedly installed at the front end of the support frame, the lead screw is rotatably installed between the first gantry frame and the second gantry frame, the drive motor is fixedly installed at the top front end of the second gantry frame, the pulleys are rotatably installed at the bottom ends of the second gantry frame, the gears are fixedly installed at the center of the opposite side ends of the pulleys, the guide extension rods are symmetrically fixedly installed at the bottom front end of the support frame, the connecting base frame is slidably sleeved on the outer ring of the guide extension rods, the positioning base frame is fixedly installed at the top rear end of the connecting base frame, and the second rack is fixedly installed at the front end of the connecting base frame.

[0012] The pressure relief valve is slidably inserted into the top of the support plate, the connecting front frame is threaded onto the outer ring of the lead screw, the air tightness tester is fixedly installed at the bottom of the second gantry, the positioning vertical frame is fixedly installed at the top front end of the support frame, and the positioning vertical frame is located behind the spool, and the bottom end of the connecting rope is connected to the spool.

[0013] The support plate has a circular hole inside, and a positioning column is fixedly installed on the top of the circular hole. Pulleys are equidistantly installed on both sides of the support plate. Sliding grooves are opened on both sides of the support frame. The L-shaped air cylinder is hollow inside, and a sealed cavity is formed between the L-shaped air cylinder, the first piston rod, and the second piston rod.

[0014] The alignment pipe is horizontally aligned with the pressure relief valve, the contact plate is vertically aligned with the second piston rod, an iron plate is fixedly installed at the top of the second piston rod, and a magnet is installed at the bottom of the contact plate.

[0015] The positioning frame has a slot inside, the movable key is vertically aligned with the photoelectric sensor, the thickness of the second rack and the first rack is 0.5 cm, the thickness of the gear is 1 cm, and the connecting front frame has a square hole inside.

[0016] The support frame also includes a conveyor belt, which is fixedly installed at the top rear end of the support frame and inside the conveyor belt.

[0017] This utility model also provides a method for using a testing device for pressure relief valves of dry capacitors, including the following steps:

[0018] S1. First, place the pressure relief valve on the top of the support plate, then turn on the drive motor to drive the lead screw to rotate. When the lead screw rotates, it can drive the connecting front frame and the support plate to move, so that the support plate can drive the pressure relief valve to connect with the aligned pipe.

[0019] S2. Subsequently, when the pressure relief valve is connected to the alignment pipe, the connecting front frame can continuously move forward, so that the first rack can drive the gear to rotate, and the second rack can drive the positioning base frame to move upward through the connecting base frame until the positioning base frame is connected to the bottom end of the pressure relief valve. When the gear rotates, it can drive the spool to rotate and wind up the connecting rope, so that the movable key can move downward, so that the L-shaped alignment plate can press the top of the pressure relief valve to prevent the pressure relief valve from loosening. At the same time, the movable key can contact the photoelectric sensor to start the air tightness tester to perform an air tightness test on the pressure relief valve.

[0020] S3. Finally, when the movable key moves downward, it can drive the contact plate to press the second piston rod into the interior of the L-shaped air cylinder, so that the contact arc plate can move to contact the outer surface of the pressure relief valve and the alignment pipe, which can prevent leakage between the alignment pipe and the pressure relief valve, and complete the airtightness test of the pressure relief valve.

[0021] The beneficial effects of this utility model are: its inspection device and inspection method can determine the quality level and stability of a batch of pressure relief valves, improve the efficiency of incoming material inspection, and effectively eliminate serious quality defects in batches of pressure relief valve products.

[0022] This invention is easy to use and can meet the requirements for long-term safe, stable and reliable operation of capacitors under high and low temperature environments. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the main body from a frontal perspective in this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the bearing device from the front view in this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the support component from the front view in this utility model;

[0026] Figure 4 This is a three-dimensional structural diagram of the alignment device from the front view in this utility model;

[0027] Figure 5 This is a three-dimensional structural diagram of the synchronization device from the front view in this utility model;

[0028] Figure 6 This is a three-dimensional structural diagram of the transmission device from a lower perspective in this utility model;

[0029] Figure 7 This is a three-dimensional structural diagram of the transmission device from the front view in this utility model;

[0030] Figure 8This is a frontal perspective three-dimensional structural diagram of the second embodiment of the support frame in this utility model.

[0031] In the diagram: 1-Bearing device, 2-Supporting component, 3-Pressure relief valve, 4-Connecting front frame, 5-First rack, 6-First vertical plate, 7-Contact base plate, 8-First spring, 9-Second vertical plate, 10-Supporting plate, 11-Guide rod, 12-Alignment device, 13-Synchronization device, 14-Transmission device, 15-Alignment pipe, 16-Contact arc plate, 17-First piston rod, 18-Second piston rod, 19-L-shaped air cylinder, 20-Guide crossbar, 21-Extension bracket, 22 - Air tightness tester, 23- Movable key, 24- Second spring, 25- Photoelectric sensor, 26- Positioning frame, 27- Connecting rope, 28- Extension front frame, 29- Contact pressure plate, 30- L-shaped alignment plate, 31- Support frame, 32- First gantry frame, 33- Lead screw, 34- Threaded wheel, 35- Drive motor, 36- Second gantry frame, 37- Second rack, 38- Gear, 39- Connecting base frame, 40- Guide extension rod, 41- Positioning base frame, 42- Conveyor belt. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 , Figure 3 and Figure 5 As shown, the testing equipment and method for the pressure relief valve of the dry capacitor of this utility model includes a support component 2. A bearing device 1 is slidably installed on the top rear end of the support component 2. A pressure relief valve 3 is placed on the top of the bearing device 1. The support component 2 includes an alignment device 12, a synchronization device 13, and a transmission device 14. The alignment device 12 is fixedly installed inside the front end of the transmission device 14. The synchronization device 13 is symmetrically fixedly installed on the top of the alignment device 12. The synchronization device 13 includes a movable latch 23, a second spring 24, a photoelectric sensor 25, a positioning frame 26, a connecting rope 27, and an extension... The front extension frame 28, contact pressure plate 29, and L-shaped alignment plate 30 are fixedly installed on the side end of the positioning frame 26. The second spring 24 is fixedly installed on the inner bottom end of the positioning frame 26. The movable locking key 23 is fixedly installed on the top end of the second spring 24. The L-shaped alignment plate 30 is fixedly installed on the end of the movable locking key 23 away from the photoelectric sensor 25. The front extension frame 28 is fixedly installed on the front end of the movable locking key 23 away from the L-shaped alignment plate 30. The connecting rope 27 is fixedly installed on the bottom front end of the front extension frame 28. The contact pressure plate 29 is fixedly installed on the bottom center of the front extension frame 28.

[0034] like Figure 2The bearing device 1 includes a connecting front frame 4, a first rack 5, a first vertical plate 6, a contact bottom plate 7, a first spring 8, a second vertical plate 9, a support plate 10, and a guide rod 11. The second vertical plate 9 is symmetrically fixedly installed at the top of the support plate 10. The guide rod 11 is slidably inserted into the inner center of the second vertical plate 9. The first vertical plate 6 is fixedly installed at the front end center of the guide rod 11. The connecting front frame 4 is fixedly installed at the bottom end of the first vertical plate 6. The first rack 5 is symmetrically fixedly installed at the front end of the connecting front frame 4. The first spring 8 is fixedly installed between the first vertical plate 6 and the second vertical plate 9, and the first spring 8 is located on the outer ring of the guide rod 11. The contact bottom plate 7 is fixedly installed at the bottom front end of the support plate 10. By sliding the guide rod 11 inside the second vertical plate 9, the connecting front frame 4 can be allowed to continuously displace away from the support plate 10.

[0035] like Figure 4 The alignment device 12 includes an alignment pipe 15, a contact arc plate 16, a first piston rod 17, a second piston rod 18, an L-shaped air cylinder 19, a guide crossbar 20, an extension bracket 21, and an air tightness tester 22. The extension bracket 21 is fixedly installed at the rear of both ends of the air tightness tester 22. The L-shaped air cylinder 19 is fixedly installed inside the extension bracket 21 away from the air tightness tester 22. The first piston rod 17 is slidably inserted into the bottom end of the L-shaped air cylinder 19. The contact arc plate 16 is fixedly installed on the end of the first piston rod 17 away from the L-shaped air cylinder 19. The second piston rod 18 is slidably inserted into the top end of the L-shaped air cylinder 19. The alignment pipe 15 is fixedly installed at the center of the rear end of the air tightness tester 22. The guide crossbar 20 symmetrically slides through the extension bracket 21 and connects with the contact arc plate 16. When the two contact arc plates 16 are combined, the gap at the junction of the alignment pipe 15 and the pressure relief valve 3 can be sealed.

[0036] like Figure 6 and Figure 7The transmission device 14 includes a support frame 31, a first gantry frame 32, a lead screw 33, a reel 34, a drive motor 35, a second gantry frame 36, a second rack 37, a gear 38, a connecting base frame 39, a guide extension rod 40, and a positioning base frame 41. The first gantry frame 32 is fixedly installed at the top rear end of the support frame 31, the second gantry frame 36 is fixedly installed at the front end of the support frame 31, the lead screw 33 is rotatably installed between the first gantry frame 32 and the second gantry frame 36, and the drive motor 35 is fixedly installed at the top front end of the second gantry frame 36. The spool 34 is rotatably mounted at the bottom of both ends of the second gantry 36. The gear 38 is fixedly mounted at the center of the opposite side end of the spool 34. The guide extension rod 40 is symmetrically fixedly mounted at the bottom front end of the support frame 31. The connecting base 39 is slidably sleeved on the outer ring of the guide extension rod 40. The positioning base 41 is fixedly mounted on the top rear end of the connecting base 39. The second rack 37 is fixedly mounted on the front end of the connecting base 39. By sliding the connecting base 39 on the outer ring of the guide extension rod 40, the connecting base 39 can be supported to move up and down in a straight line.

[0037] The pressure relief valve 3 is slidably inserted into the top of the support plate 10. The connecting front frame 4 is threaded onto the outer ring of the lead screw 33. The airtightness tester 22 is fixedly installed at the bottom of the second gantry 36. The positioning vertical frame 26 is fixedly installed at the top front end of the support frame 31, and the positioning vertical frame 26 is located behind the reel 34. The bottom end of the connecting rope 27 is connected to the reel 34. A round hole is opened inside the support plate 10, and a positioning column is fixedly installed at the top of the round hole. Pulleys are equidistantly rotatably installed on both sides of the support plate 10. Sliding grooves are opened on both sides inside the support frame 31. The inner L-shaped air cylinder 19... The part is hollow, and a sealed cavity is formed between the L-shaped air cylinder 19, the first piston rod 17 and the second piston rod 18. The alignment pipe 15 is horizontally aligned with the pressure relief valve 3. The contact plate 29 is vertically aligned with the second piston rod 18. An iron plate is fixedly installed at the top of the second piston rod 18. A magnet is installed at the bottom of the contact plate 29. The positioning vertical frame 26 has a slot inside. The movable key 23 is vertically aligned with the photoelectric sensor 25. The thickness of the second rack 37 and the first rack 5 is 0.5 cm. The thickness of the gear 38 is 1 cm. The connecting front frame 4 has a square hole inside.

[0038] This utility model also provides a method for using a testing device for pressure relief valves of dry capacitors, including the following steps:

[0039] S1. First, place the pressure relief valve 3 on the top of the support plate 10, then turn on the drive motor 35 to drive the lead screw 33 to rotate. When the lead screw 33 rotates, it can drive the connecting front frame 4 and the support plate 10 to move, so that the support plate 10 can drive the pressure relief valve 3 to move to dock with the alignment pipe 15.

[0040] S2. Subsequently, when the pressure relief valve 3 is connected to the alignment pipe 15, the connecting front frame 4 can continuously move forward, so that the first rack 5 can drive the gear 38 to rotate, and the second rack 37 can drive the positioning base frame 41 to move upward through the connecting base frame 39 until the positioning base frame 41 is connected to the bottom end of the pressure relief valve 3. When the gear 38 rotates, it can drive the reel 34 to rotate and wind up the connecting rope 27, so that the movable key 23 can move downward, so that the L-shaped alignment plate 30 can press the top of the pressure relief valve 3 to prevent the pressure relief valve 3 from loosening. At the same time, the movable key 23 can contact the photoelectric sensor 25 to start the air tightness tester 22 to perform an air tightness test on the pressure relief valve 3.

[0041] S3. Finally, when the movable key 23 moves downward, it can drive the contact plate 29 to press the second piston rod 18 into the interior of the L-shaped air cylinder 19, so that the contact arc plate 16 can move to contact the outer surface of the pressure relief valve 3 and the alignment pipe 15, which can prevent leakage between the alignment pipe 15 and the pressure relief valve 3, and complete the airtightness test of the pressure relief valve 3.

[0042] The working principle of Example 1 is as follows: In use, first place the pressure relief valve 3 on the top of the support plate 10 until the round hole of the flange at the bottom of the pressure relief valve 3 is inserted into the positioning post at the top of the support plate 10, so that the pressure relief valve 3 can be placed stably on the support plate 10. Then, turn on the drive motor 35 to drive the lead screw 33 to rotate. The connecting front frame 4 is threaded onto the outer ring of the lead screw 33, so that when the lead screw 33 rotates, it can drive the connecting front frame 4 to move forward. At this time, the first spring 8 is installed between the first vertical plate 6 and the second vertical plate 9, so that when the connecting front frame 4 moves, it can pull the support plate 10 to move through the first spring 8. The movement is achieved by the pulleys on both sides of the support plate 10 in the sliding grooves on both sides inside the support frame 31. This improves the smoothness of the movement of the support plate 10. When the connecting front frame 4 moves the support plate 10 to its extreme position at the front end, the contact base plate 7 can contact the inner front end of the support frame 31, allowing the support frame 31 to prevent the support plate 10 from continuing to move forward. At this time, the support plate 10 can drive the pressure relief valve 3 to be vertically aligned with the positioning base frame 41. Through the setting of the first spring 8, the connecting front frame 4 can be allowed to continue to move forward, allowing the first rack 5 to move to mesh with the bottom end of the gear 38, thereby driving the gear 38 to rotate. When the gear 38 rotates, the first rack 5 and the second rack 37 are misaligned, which prevents the first rack 5 from interfering with the second rack 37 when it moves along the bottom end of the gear 38. When the second rack 37 rotates... When the device moves upward, the connecting base 39 can drive the positioning base 41 to move upward. When the positioning base 41 moves upward to its limit position, it can contact the bottom end of the pressure relief valve 3, sealing the bottom end of the pressure relief valve 3. At the same time, when the gear 38 rotates, it can drive the reel 34 to rotate. The reel 34 can pull the extension front frame 28 and the movable latch 23 downward through the connecting rope 27, so that the L-shaped alignment plate 30 can move downward to contact the top end of the pressure relief valve 3, pressing the pressure relief valve 3 onto the support plate 10. At the same time, when the support plate 10 moves to its limit position at the front end, the output pipe at the front end of the pressure relief valve 3 can be inserted into the interior of the alignment pipe 15, so that the alignment pipe 15 can be connected to the pressure relief valve 3, facilitating the pressure relief valve 3 to enter. During the airtightness test, when the movable latch 23 moves downward, it can also drive the contact plate 29 to press the second piston rod 18 into the interior of the L-shaped air cylinder 19. This causes the first piston rod 17 to move the contact arc plate 16 to contact the surfaces of the alignment pipe 15 and the pressure relief valve 3. A sealing ring is fixedly installed on the inner wall of the contact arc plate 16 away from the first piston rod 17, allowing the contact arc plate 16 to seal between the alignment pipe 15 and the pressure relief valve 3, improving the sealing performance of the pressure relief valve 3 during testing. Subsequently, when the movable latch 23 moves downward to its limit position, it can contact the photoelectric sensor 25. The photoelectric sensor 25 is electrically connected to the airtightness tester 22, allowing the airtightness tester 22 to be activated.Therefore, the airtightness tester 22 can perform airtightness testing on the pressure relief valve 3. When the pressure relief valve 3 has completed the test, the drive motor 35 can be turned on again, causing the lead screw 33 to rotate in the opposite direction. This allows the connecting front frame 4 to move to the rear end, so that the first rack 5 can move to the rear end along the bottom end of the gear 38. The second rack 37 can drive the connecting base frame 39 and the positioning base frame 41 to move downward. The positioning base frame 41 disengages from the pressure relief valve 3, and the gear 38 can drive the reel 34 to rotate in the opposite direction, releasing the connecting rope 27. The elasticity of the second spring 24 will cause the movable latch 23 and the L-shaped alignment plate 30 to move upward and reset, thereby disengaging the L-shaped alignment plate 30 from the top of the pressure relief valve 3, and disengaging the movable latch 23 from the photoelectric sensor 25. Simultaneously, the airtightness tester 22 is de-energized, unlocking the pressure relief valve 3. Furthermore, as the movable latch 23 moves upward, the contact plate 29 can attract and drive the second piston rod 18 upward, allowing the first piston rod 17 to enter the interior of the L-shaped air cylinder 19, thus driving the contact arc plate 16 to... The alignment pipe 15 and pressure relief valve 3 disengage, and slide within the extension bracket 21 via the guide bar 20, allowing the support contact arc plate 16 to move linearly, improving the alignment accuracy between the contact arc plate 16 and the alignment pipe 15. When the connecting front frame 4 moves rearward to contact the front end of the support plate 10, the connecting front frame 4 can adhere to the surface of the support plate 10. As the connecting front frame 4 continues to move rearward, it can compress the support plate 10 to move rearward synchronously, facilitating the support plate 10 to drive the pressure after testing. The release valve 3 moves to its rear end to reset. During use, when the support plate 10 moves the pressure release valve 3 to contact the alignment pipe 15, the contact pressure plate 29 can be located behind the connecting front frame 4. This prevents the connecting front frame 4 from interfering with the contact pressure plate 29 as it continuously moves forward. Simultaneously, the square hole inside the connecting front frame 4 is larger than the outer dimensions of the airtightness tester 22, the second piston rod 18, the L-shaped air cylinder 19, and the contact arc plate 16, facilitating the continuous forward displacement of the connecting front frame 4 to complete the operation.

[0043] Based on the above, such as Figure 8 As shown, the support frame 31 also includes conveyor belts 42 and 43. Conveyor belt 42 is fixedly installed at the top rear end of the support frame 31, and 43 is fixedly installed inside the conveyor belt 42.

[0044] In this embodiment, the pressure relief valve 3 is placed on the top of 43. When 43 is running, it can move and transport the pressure relief valve 3, which facilitates the guidance and transmission of the pressure relief valve 3. At the same time, the conveyor belt 42 is installed on the top of the support frame 31, which can support 43 to work, facilitates the stable operation of 43 and completes the work.

[0045] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A testing device for pressure relief valves used in dry-type capacitors, characterized in that: The testing equipment for the pressure relief valve of the dry capacitor comprises a support component, a bearing device, and a pressure relief valve. The support component includes an alignment device, a synchronization device, and a transmission device. The alignment device includes an alignment pipe, a contact arc plate, a first piston rod, a second piston rod, an L-shaped air cylinder, a guide crossbar, an extension bracket, and an airtightness tester. The synchronization device includes a movable latch, a second spring, a photoelectric sensor, a positioning vertical frame, a connecting rope, an extension front frame, a contact pressure plate, and an L-shaped alignment plate. The transmission device includes a support frame, a first gantry frame, a lead screw, a reel, a drive motor, a second gantry frame, a second rack, a gear, a connecting base frame, a guide extension rod, and a positioning base frame. The bearing device includes a connecting front frame, a first rack, a first vertical plate, a contact base plate, a first spring, a second vertical plate, a support plate, and a guide rod. The bearing device is slidably mounted on the top rear end of the support component, and the pressure relief valve is placed on the top of the bearing device.

2. The testing equipment for the pressure relief valve of the dry capacitor according to claim 1, characterized in that: The alignment device of the support component is fixedly installed inside the front end of the transmission device. The synchronization device is symmetrically fixedly installed at the top of the alignment device. The photoelectric sensor is fixedly installed on the side end of the positioning frame. The second spring is fixedly installed inside the bottom end of the positioning frame. The movable locking key is fixedly installed at the top of the second spring. The L-shaped alignment plate is fixedly installed at the end of the movable locking key away from the photoelectric sensor. The extension front frame is fixedly installed at the front end of the movable locking key away from the L-shaped alignment plate. The connecting rope is fixedly installed at the bottom front end of the extension front frame. The contact pressure plate is fixedly installed at the bottom center of the extension front frame.

3. The testing equipment for the pressure relief valve of a dry capacitor according to claim 1, characterized in that: The second vertical plate of the bearing device is symmetrically fixedly installed at the top of the support plate. The guide rod is slidably inserted into the inner center of the second vertical plate. The first vertical plate is fixedly installed at the front end center of the guide rod. The connecting front frame is fixedly installed at the bottom end of the first vertical plate. The first rack is symmetrically fixedly installed at the front end of the connecting front frame. The first spring is fixedly installed between the first vertical plate and the second vertical plate and is located on the outer ring of the guide rod. The contact bottom plate is fixedly installed at the bottom front end of the support plate.

4. The testing equipment for the pressure relief valve of the dry capacitor according to claim 1, characterized in that: The pressure relief valve is slidably inserted into the top of the support plate, the connecting front frame is threaded onto the outer ring of the lead screw, the air tightness tester is fixedly installed at the bottom of the second gantry, the positioning vertical frame is fixedly installed at the top front end of the support frame and the positioning vertical frame is located behind the reel, and the bottom end of the connecting rope is connected to the reel.

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