A high-voltage plug reliability testing machine

Abstract

This invention belongs to the technical field of plug-in head testing equipment, specifically a high-voltage plug-in head reliability testing machine, comprising a base; a connecting plate is installed on the top of the base, and uprights are fixedly installed on the top of the connecting plate near its perimeter; a top plate is fixedly installed on the top of the uprights, and a moving plate is slidably connected to the outer perimeter of the uprights; a reduction motor is fixedly installed at the middle position of the bottom of the inner cavity of the base; in this invention, the connector has a universal floating function through the cooperation of the cross groove and the guide ring, combined with the gravity compensation design of the internal air cushion, so that the end cap can smoothly float and adaptively fine-tune the centering during the insertion process, eliminating the positional error caused by manual placement. At the same time, the contact force is closed-loop controlled by a cylindrical pressure sensor and an O-type neutral position solenoid valve, and the pressure holding stops when the set pressure is reached, which avoids rigid hard interference damaging the plug-in head and ensures that the sealing cone surface is uniformly stressed and tightly fitted, thus improving the sealing quality.

Description

Technical Field

[0001] This invention belongs to the technical field of plug-in head testing equipment, specifically a high-voltage plug-in head reliability testing machine. Background Technology

[0002] High-voltage plugs (such as outdoor terminal cable accessories) are key insulation and sealing components used in power systems for connecting and branching cables. Before leaving the factory or during routine maintenance, they must be tested under extreme conditions such as high-voltage discharge and withstand voltage using a dedicated reliability testing machine.

[0003] Existing high-voltage plug reliability testing machines typically operate in the following mode: the plug to be tested is fixed on the base, and an outdoor terminal with conductive posts is driven downward by a lead screw or cylinder to insert it into the inner cavity of the plug, and then power is applied for testing. During the clamping and sealing stage, rigid pushing can easily cause misalignment and hard interference between the sealing head cone surface and the plug socket. This can result in minor scratches on the sealing surface leading to air leakage during testing, or even damage to the end. Furthermore, the lateral clamping lacks a force feedback adjustment mechanism, often causing plug deformation due to excessive clamping force or loosening of the clamp due to insufficient clamping force. Secondly, during the insertion stage of the conductive post, due to the lack of effective pre-guidance and flexible buffering, the initial slight alignment deviation during insertion can turn into edge impact. The mechanical kinetic energy at the moment of insertion can be converted into a destructive rigid impact, which can easily damage the internal precision contacts. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention aims to provide a high-voltage plug reliability testing machine. By using this device, the problems mentioned in the background are solved.

[0005] The technical solution adopted by this invention to solve its technical problem is: a high-voltage plug reliability testing machine, including a base; a connecting plate is installed on the top of the base, and uprights are fixedly installed on the top of the connecting plate near its four sides. A top plate is fixedly installed on the top of the uprights, and a movable plate is slidably connected to the outer periphery of the uprights. A reduction motor is fixedly installed at the middle position of the bottom of the inner cavity of the base. A first lead screw is fixedly installed at the end of the power output shaft of the reduction motor. The top of the first lead screw movably passes through the top of the connecting plate and is rotatably connected to the bottom of the top plate. A first threaded sleeve is threadedly connected to the outer periphery of the first lead screw, and the first threaded sleeve passes through the top of the movable plate. Placement plates are fixedly installed on the top of the movable plate near its two sides. A support frame is fixedly installed on the top of the top plate. An outdoor terminal is installed on the top of the inner cavity of the support frame. A placement tray is fixedly installed at the middle position of the top of the placement plate. A front plug is provided on the top of the placement tray. Sealing components are provided on the front and rear sides of the front plug. Pressing components are provided on both sides of the front plug. A testing component is provided on the top of the front plug.

[0006] Preferably, the sealing assembly includes a positioning cylinder fixedly installed on the top of the placement plate. A first flange is fixedly installed at the rear end of the positioning cylinder. A second flange is provided on the rear side of the first flange. A connector is provided on the rear side of the second flange. An end cap is provided on the rear side of the connector. The rear side of the end cap is movably inserted into the inner cavity of the front plug. A cylindrical pressure sensor is fixedly installed on the front side of the end cap. A cross groove is opened on the outer periphery of the connector, and a cross block is slidably connected to the inner cavity of the cross groove. A guide ring is fixedly installed on the front side of the end cap. Movable openings are opened on both sides of the guide ring, and connecting blocks are fixedly installed in the inner cavity of the movable openings. Fastening bolts are movably passed through the connecting blocks. The opposite ends of the fastening bolts are threaded onto the cross blocks. A three-way four-way solenoid valve is fixedly installed on the top of the moving plate near the other side.

[0007] Preferably, the second flange is threadedly connected to a clamping ring via an external thread. The clamping ring is engaged with the outer circumference of the connector. An adjusting nut is threadedly connected to the outer circumference of the second flange near the front end, and the rear side of the adjusting nut is fitted against the clamping ring.

[0008] Preferably, an air cushion is fixedly installed in the inner cavity of the clamping ring, the inner circumference of the air cushion is fitted to the connector, and the cross-section of the air cushion is a hollow structure.

[0009] Preferably, the pressing assembly includes a side plate installed on one side of the tray. A plurality of first T-shaped rods are movably passed through one side of the side plate. A first arc-shaped block is fixedly installed between two adjacent first T-shaped rods. A first spring is movably sleeved on the outer periphery of each first T-shaped rod near its other end, and the two ends of the first spring are fixedly connected to the side plate and the first arc-shaped block, respectively. A retaining ring is fixedly sleeved on the outer periphery of each first T-shaped rod near its middle position. A support frame is installed on the other side of the tray. A pressing cylinder is installed on the top of the support frame. A rectangular plate is installed at the end of the pressing cylinder. A movable plate is provided on one side of the rectangular plate. A plurality of second T-shaped rods are movably passed through the other side of the movable plate. A second arc-shaped block is fixedly installed at the ends of two adjacent second T-shaped rods. A fourth spring is movably sleeved on the outer periphery of each second T-shaped rod, and the two ends of the fourth spring are fixedly connected to the adjacent second arc-shaped block and the movable plate, respectively. The elastic force of the fourth spring is greater than that of the first spring.

[0010] Preferably, the test assembly includes a conductive post installed at the bottom of an outdoor terminal, an insulating sleeve provided on the outer periphery of the outdoor terminal, the insulating sleeve being located on the outer periphery of the conductive post, a second spring fixedly installed at the bottom of the outdoor terminal, and a protective sleeve fixedly installed at the bottom end of the second spring, the protective sleeve being located on the inner periphery of the insulating sleeve.

[0011] Preferably, a third spring is fixedly installed at the bottom of the outdoor terminal, and the third spring is located on the outer periphery of the second spring.

[0012] Preferably, a thin-film pressure sensor is fixedly installed on the opposite side of the first arc-shaped block and the second arc-shaped block, and an adjustment structure is provided between the movable plate and the rectangular plate.

[0013] Preferably, the adjustment structure includes a second lead screw rotatably connected to the rear side of the inner cavity of the rectangular plate. The front end of the second lead screw movably passes through the front side of the inner cavity of the rectangular plate and is fixedly installed with a drive button. A second threaded sleeve is threadedly connected to the outer periphery of the rectangular plate. One side of the second threaded sleeve is fixedly connected to a movable plate. Guide rods movably pass through the front side of the second threaded sleeve near the top and bottom. The front and rear ends of the guide rods are fixedly connected to the front and rear sides of the inner cavity of the rectangular plate, respectively.

[0014] Preferably, the compression stroke of the first spring is less than the compression stroke of the fourth spring.

[0015] The beneficial effects of this invention are as follows: 1. This invention enables the connector to have a omnidirectional floating function through the cooperation of the cross groove and the guide ring. Combined with the gravity compensation design of the internal air cushion, the end cap can be smoothly suspended and adaptively fine-tuned for centering during the insertion process, eliminating the positional error caused by manual placement. At the same time, the contact force is closed-loop controlled by the cylindrical pressure sensor and the O-type neutral position solenoid valve, and the pressure holding stops when the set pressure is reached. This avoids the rigid hard interference that damages the insertion and removal head, and ensures that the sealing cone surface is uniformly stressed and tightly fitted, thus improving the sealing quality.

[0016] 2. By strictly limiting the retraction stroke of the first spring to a small range (e.g., 5mm), this invention restricts the initial deflection of the workpiece from the source, avoiding violent relative sliding between the arc block and the plug surface during correction, and fundamentally preventing mechanical scratches on the surface. In addition, the thin-film pressure sensor and the lead screw adjustment structure work together to allow the operator to precisely fine-tune the clamping position according to the actual pressure feedback, ensuring that the clamping force is moderate and uniform around the perimeter, and eliminating workpiece deformation caused by excessive clamping force or loosening and displacement caused by insufficient clamping force.

[0017] 3. The test component in this invention utilizes the conical structure at the bottom of the protective sleeve to achieve automatic positioning and precise guidance in the initial stage of insertion, forming a dual mechanical and electrical protective barrier in conjunction with the insulating sleeve; at the end of insertion, the mechanical kinetic energy generated at the moment the conductive post is in place is absorbed step by step through the sequential compression of the second and third springs, which greatly reduces the rigid impact force and effectively protects the precision conductive contacts inside the plug from impact damage.

[0018] 4. The present invention relies on the dynamic compression deformation of the fourth spring to absorb shock in the lateral direction, and relies on the floating gap reserved by the sealing component in the axial direction to make slight displacement and give way. This multi-dimensional flexible force relief structure avoids the relative movement or arcing phenomenon caused by rigid transmission of vibration between test components, and maintains the dynamic stability of the test process. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the connecting plate, the geared motor, and the first threaded sleeve of the present invention; Figure 4 This is a three-dimensional structural diagram of the movable plate, positioning cylinder, and side plate of the present invention; Figure 5 This is a three-dimensional structural diagram of the outdoor terminal and front plug of the present invention; Figure 6 This is a three-dimensional structural diagram of the placement plate, positioning cylinder, and front plug of the present invention; Figure 7 This is a partial sectional view of the front plug, positioning cylinder, and support frame of the present invention; Figure 8 This is an exploded view of the second flange, adjusting nut, and clamping ring of the present invention; Figure 9 This is a cross-sectional view of the placement plate, side plate, and front plug of the present invention; Figure 10 This is a partial three-dimensional structural diagram of the placement plate, side plate, and support frame of the present invention; Figure 11 This is a cross-sectional view of the placement plate, placement tray, and movable plate of the present invention; Figure 12 This is the invention Figure 5 Enlarged view of point A in the middle; Figure 13 This is the invention Figure 7 Enlarged view at point B in the middle; Figure 14 This is the invention Figure 8 Enlarged view at point C; Figure 15 This is the invention Figure 9 Enlarged view at point D; Figure 16 This is the invention Figure 10 Enlarged view of point E in the middle.

[0021] In the diagram: 1. Base; 2. Connecting plate; 3. Gear motor; 4. First lead screw; 5. First threaded sleeve; 6. Moving plate; 7. Upright pole; 8. Top plate; 9. Support frame; 10. Outdoor terminal; 11. Placement plate; 12. Positioning cylinder; 13. Front plug; 14. Placement tray; 15. Support frame; 16. Clamping cylinder; 17. Side plate; 18. First T-shaped rod; 19. Retaining ring; 20. First spring; 21. First flange; 22. Second flange; 23. Adjusting nut; 24. Clamping ring; 25. Air cushion 26. Connector; 27. Cylindrical pressure sensor; 28. End cap; 29. ​​Guide ring; 30. Cross groove; 31. Cross block; 32. Fastening bolt; 33. Insulating sleeve; 34. Protective sleeve; 35. Second spring; 36. Third spring; 37. Rectangular plate; 38. Second threaded sleeve; 39. Second lead screw; 40. Guide rod; 41. Movable plate; 42. Second T-shaped rod; 43. Fourth spring; 44. Second arc block; 45. First arc block; 46. Thin-film pressure sensor; 47. Three-way four-way solenoid valve. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] Example 1 like Figure 1 - Figure 16 As shown, a high-voltage plug reliability testing machine includes a base 1; a connecting plate 2 is mounted on the top of the base 1, and uprights 7 are fixedly mounted on the top of the connecting plate 2 near its four sides. A top plate 8 is fixedly mounted on the top of the uprights 7, and a movable plate 6 is slidably connected to the outer periphery of the uprights 7. A reduction motor 3 is fixedly mounted at the middle position of the bottom of the inner cavity of the base 1. A first lead screw 4 is fixedly mounted on the end of the power output shaft of the reduction motor 3. The top of the first lead screw 4 movably passes through the top of the connecting plate 2 and is rotatably connected to the bottom of the top plate 8. A first threaded sleeve is threadedly connected to the outer periphery of the first lead screw 4. 5. The first threaded sleeve 5 penetrates the top of the movable plate 6. Placement plates 11 are fixedly installed on the top of the movable plate 6 near both sides. Support frames 9 are fixedly installed on the top of the top plate 8. Outdoor terminals 10 are installed on the top of the inner cavity of the support frames 9. Placement trays 14 are fixedly installed at the middle position of the top of the placement plates 11. Front plugs 13 are provided on the top of the placement trays 14 for supporting the front plugs 13. Sealing components are provided on the front and rear sides of the front plugs 13. Pressing components are provided on both sides of the front plugs 13. Testing components are provided on the top of the front plugs 13.

[0024] When testing the front plug 13, the front plug 13 is first placed on the placement tray 14, and the sealing component seals its front and rear ends. Then, the pressing component limits the left and right sides of the front plug 13. After the above clamping and positioning is completed, the reduction motor 3 starts, and its power output shaft drives the first lead screw 4 to rotate. Through the thread transmission, the first threaded sleeve 5 moves linearly upward, which in turn moves the moving plate 6 upward. Finally, the conductive post fixed on the outdoor terminal 10 is accurately inserted into the inner cavity of the front plug 13. The system is powered on to complete the testing operation, which improves the efficiency of testing the front plug 13.

[0025] Example 2 like Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Figure 13 and Figure 14 As shown; the sealing assembly includes a positioning cylinder 12 fixedly installed on the top of the placement plate 11. A first flange 21 is fixedly installed at the rear end of the positioning cylinder 12. A second flange 22 is provided on the rear side of the first flange 21. A connector 26 is provided on the rear side of the second flange 22. A sealing head 28 is provided on the rear side of the connector 26. The rear side of the sealing head 28 is movably inserted into the inner cavity of the front plug 13. A cylindrical pressure sensor 27 is fixedly installed on the front side of the sealing head 28. The outer periphery of the connector 26 is provided with... A cross groove 30 is provided, and a cross block 31 is slidably connected to the inner cavity of the cross groove 30. A threaded blind hole is provided on the cross block 31. A guide ring 29 is fixedly installed on the front side of the end cap 28. Movable openings are provided on both sides of the guide ring 29, and connecting blocks are fixedly installed in the inner cavity of the movable openings. Fastening bolts 32 are movably passed through the connecting blocks respectively. The opposite ends of the fastening bolts 32 are threadedly connected to the cross block 31. A three-way four-way solenoid valve 47 is fixedly installed on the top of the movable plate 6 near the other side.

[0026] The positioning cylinder 12 drives the connector 26 to move via the first flange 21 and the second flange 22. The connector 26 and the guide ring 29 are connected by fastening bolts 32 to the threaded blind hole of the cross block 31 to achieve linkage. A space for axial movement is reserved between the guide ring 29 and the connector 26. During operation, the positioning cylinder 12 extends to push the end cap 28 into the inner cavity of the front plug 13. The cylindrical pressure sensor 27 monitors the contact pressure in real time. When the pressure reaches the set threshold, the system controls the three-way four-way solenoid valve 47 to be in the O-type neutral position, so that the positioning cylinder 12 stops and maintains pressure. At this time, the end cap 28 and the front plug 13 are positioned, which not only ensures accurate alignment, but also avoids rigid hard interference with the pressing component during operation. In addition, the design of the axial floating gap provides a buffer margin for the small offset that may occur during subsequent testing, effectively improving the stability and reliability of positioning.

[0027] The second flange 22 is connected to a clamping ring 24 via an external thread. The clamping ring 24 is engaged with the outer periphery of the connector 26. An adjusting nut 23 is threadedly connected to the outer periphery of the second flange 22 near the front end, and the rear side of the adjusting nut 23 is fitted against the clamping ring 24.

[0028] The connector 26 is installed and fixed to the second flange 22 by threaded connection of the clamping ring 24. By adjusting the adjusting nut 23 to fit with the clamping ring 24, the clamping ring 24 is prevented from moving on the second flange 22. The gap between the clamping ring 24 and the connector 26 can be adjusted, and the connector 26 will not wobble. During the insertion of the end cap 28 into the inner cavity of the front plug 13, the connector 26 has the ability to float in any direction. This adaptive fine-tuning structure can effectively eliminate assembly errors and avoid misalignment between the end cap 28 and the front plug 13, thereby ensuring that the sealing cone surface of the end cap 28 and the inner wall of the front plug 13 achieve uniform and tight fit, which significantly improves the sealing performance after the two are inserted.

[0029] An air cushion 25 is fixedly installed in the inner cavity of the clamping ring 24. The inner circumference of the air cushion 25 is fitted to the connector 26, and the cross-section of the air cushion 25 is hollow.

[0030] By setting an air cushion 25 to provide flexible support for the connector 26 to maintain its accurate initial position, the air cushion 25 is filled with gas at a set pressure. The upward thrust generated by this air pressure can effectively offset the overall weight of the moving parts such as the end cap 28 and the guide ring 29. This gravity compensation mechanism keeps the connector 26 and related parts in a slightly suspended follow-up state. On the one hand, it ensures the accuracy of alignment, and on the other hand, it greatly reduces the frictional resistance and off-center jamming during the insertion process, which significantly improves the smoothness and fluidity of the end cap 28 when it is inserted into the front plug 13.

[0031] Example 3 Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 11 and Figure 15As shown, the pressing assembly includes a side plate 17 installed on one side of the tray 14. Several first T-shaped rods 18 are movably inserted through one side of the side plate 17. A first arc-shaped block 45 is fixedly installed between adjacent first T-shaped rods 18. A first spring 20 is movably sleeved on the outer periphery of each first T-shaped rod 18 near its other end, and both ends of the first spring 20 are fixedly connected to the side plate 17 and the first arc-shaped block 45, respectively. A retaining ring 19 is fixedly sleeved on the outer periphery of each first T-shaped rod 18 near its middle position. A support bracket 15 is installed on the other side of the tray 14. A clamping cylinder 16 is installed on the top of the support frame 15. A rectangular plate 37 is installed at the end of the clamping cylinder 16. A movable plate 41 is provided on one side of the rectangular plate 37. Several second T-shaped rods 42 are movably passed through the other side of the movable plate 41. A second arc-shaped block 44 is fixedly installed at the ends of two adjacent second T-shaped rods 42. A fourth spring 43 is movably sleeved on the outer periphery of each second T-shaped rod 42. The two ends of the fourth spring 43 are fixedly connected to the adjacent second arc-shaped block 44 and the movable plate 41, respectively. The elastic force of the fourth spring 43 is greater than the elastic force of the first spring 20.

[0032] After the clamping cylinder 16 is activated, based on the fact that the elastic force of the fourth spring 43 is greater than that of the first spring 20, the second arc-shaped block 44 on the side of the movable plate 41 pushes the front plug 13 to the opposite side, thereby pushing the first arc-shaped block 45 on the opposite side and compressing several first springs 20. When the first arc-shaped block 45 retracts to the point where the retaining ring 19 and the side plate 17 are rigidly in contact, the front plug 13 completes the initial clamping. If the clamping cylinder 16 continues to apply force at this time, the fourth spring 43 will undergo elastic compression deformation due to the hard limit block, ensuring the high-precision alignment of the front plug 13, preventing the upper conductive post from not being able to be inserted when it is inserted, and in the subsequent discharge test, the buffering effect of the fourth spring 43 can effectively absorb the violent vibration caused by the electric arc and maintain the dynamic stability of the test process.

[0033] Example 4 like Figure 5 , Figure 12 and Figure 16 The test assembly includes a conductive post installed at the bottom of an outdoor terminal 10. An insulating sleeve 33 is provided on the outer periphery of the outdoor terminal 10. The insulating sleeve 33 is located on the outer periphery of the conductive post. A second spring 35 is fixedly installed at the bottom of the outdoor terminal 10, and a protective sleeve 34 (the outer periphery of the protective sleeve 34 is conical near the bottom) is fixedly installed at the bottom end of the second spring 35. The protective sleeve 34 is located on the inner periphery of the insulating sleeve 33.

[0034] As the protective sleeve 34 moves upward, the second spring 35 is compressed and stores energy. Thanks to the conical guide structure designed at the bottom of the protective sleeve 34, the conical surface can automatically locate and precisely guide the plug 13 in the initial stage of insertion, ensuring that the conductive post can be smoothly inserted without interference. In addition, the insulating sleeve 33 and the protective sleeve 34 form a double protective barrier, effectively preventing mechanical collisions of the conductive post during insertion and testing, while ensuring electrical safety.

[0035] A third spring 36 is fixedly installed at the bottom of the outdoor terminal 10, and the third spring 36 is located on the outer periphery of the second spring 35.

[0036] As the protective sleeve 34 continues to move upward and reaches the predetermined position, the third spring 36 begins to play a buffering role. Through the compression and deformation of the third spring 36, the rigid impact force generated at the moment of insertion can be greatly reduced. This flexible transition design not only protects the insertion components from damage, but also ensures that the conductive post remains in a stable and non-shifted centered state throughout the entire insertion process.

[0037] A thin-film pressure sensor 46 is fixedly installed on the opposite side of the first arc-shaped block 45 and the second arc-shaped block 44, and an adjustment structure is provided between the movable plate 41 and the rectangular plate 37.

[0038] By setting a thin-film pressure sensor 46, the pressure between the first arc-shaped block 45, the second arc-shaped block 44 and the front plug 13 can be detected in real time, which facilitates the subsequent adjustment of the position of the second arc-shaped block 44 with the adjustment structure.

[0039] The adjustment structure includes a second lead screw 39 rotatably connected to the rear side of the inner cavity of the rectangular plate 37. The front end of the second lead screw 39 moves through the front side of the inner cavity of the rectangular plate 37 and is fixedly installed with a drive button. A second threaded sleeve 38 is threadedly connected to the outer periphery of the rectangular plate 37. One side of the second threaded sleeve 38 is fixedly connected to the movable plate 41. Guide rods 40 move through the front side of the second threaded sleeve 38 near the top and bottom. The front and rear ends of the guide rods 40 are fixedly connected to the front and rear sides of the inner cavity of the rectangular plate 37, respectively.

[0040] By adding a thin-film pressure sensor 46 to the clamping side, the contact pressure and pressure distribution between the first arc block 45, the second arc block 44 and the front plug 13 can be collected in real time. The collected pressure data can not only be used to monitor the clamping status, but also form a position feedback closed loop: rotating the drive knob can drive the second lead screw 39 to rotate, causing the second threaded sleeve 38 connected to the outer periphery of the second lead screw 39 to be displaced, thereby driving the movable plate 41 to move, precisely finely adjusting the initial push position of the second arc block 44, and finally ensuring that the clamping force on the front plug 13 is moderate and the force is evenly distributed around it. This avoids the plug from being deformed and damaged due to excessive clamping force, and also eliminates the test deviation caused by loose clamping.

[0041] The compression stroke of the first spring 20 is less than that of the fourth spring 43.

[0042] The compression stroke of the first spring 20 is strictly limited to a small preset value (such as 5mm) to limit the amount of tilt of the front plug 13 when it is initially placed, so as to avoid excessive correction swing during the subsequent centering process pushed by the second arc block 44, and to avoid severe relative sliding friction between the second arc block 44 and the surface of the front plug 13 due to large angle adjustment, thereby fundamentally preventing mechanical scratch damage to the surface of the front plug 13.

[0043] During operation, after the front plug 13 is placed on the placement tray 14, the positioning cylinder 12 is activated. The first flange 21 and the second flange 22 drive the connector 26 and end cap 28 to move towards the front plug 13. Before movement, the adjusting nut 23 is tightened to lock it against the clamping ring 24, thus setting the gap between the clamping ring 24 and the connector 26. During movement, the gas inside the air cushion 25 generates thrust, counteracting the overall weight of the end cap 28 and the guide ring 29, causing the connector 26 to be suspended. With the axial gap between the guide ring 29 and the connector 26 and the cooperation of the cross block 31, the connector 26 drives the end cap 28 to float in all directions. When the end cap 28 contacts the socket of the front plug 13, it self-aligns and inserts through the conical surface. When the cylindrical pressure sensor 27 detects that the contact pressure reaches the set threshold, it outputs an electrical signal to control the three-way four-way solenoid valve 47 (O-type center position function) to operate, cutting off the air path and stopping the positioning cylinder 12, maintaining the current thrust. After the sealing is completed, the second lead screw 39 inside the rectangular plate 37 is manually driven to rotate. The second lead screw 39 drives the second threaded sleeve 38 to translate along the guide rod 40, thereby pushing the movable plate 41 and the second arc-shaped block 44 to move towards the front plug 13. After the second arc-shaped block 44 contacts the front plug 13, it pushes it to move towards the first arc-shaped block 45 on the opposite side. The first arc-shaped block 45 compresses the first spring 20 and retracts. When the first spring 20 is compressed to the point that the retaining ring 19 is in rigid contact with the side plate 17, the retraction stroke ends, and the pressing cylinder 16 continues to advance. Because the front is hardened... With the limit set, the fourth spring 43 begins to compress, pressing the front plug 13 against the first arc block 45 via the second arc block 44. During this process, the thin-film pressure sensors 46 on both sides collect the contact pressure value in real time and output signals. Based on this pressure data feedback, the operator or system manually rotates the drive knob to adjust the second lead screw 39, changing the initial absolute position of the movable plate 41 until the pressure value meets the preset range. After the lateral clamping is completed, the reduction motor 3 starts, driving the first lead screw 4 to rotate, which in turn drives the movable plate 6 along the upright 7 via the first threaded sleeve 5. As the device rises vertically, the moving plate 6 pulls the outdoor terminal 10 and the conductive post at its bottom downwards towards the front plug 13. During insertion, the conical surface at the bottom of the protective sleeve 34 first contacts the edge of the socket of the front plug 13. Under the action of the inclined surface of the socket, the protective sleeve 34 retracts upwards and compresses the second spring 35. The insulating sleeve 33 and the protective sleeve 34 then move downwards to wrap around the conductive post, completing the initial guidance. When the protective sleeve 34 moves upwards to the predetermined limit position, the third spring 36 begins to be compressed, absorbing the mechanical impact force generated when the conductive post is fully inserted. The conductive post finally passes through the protective sleeve. The sleeve 34 is inserted into the inner cavity of the front plug 13 to a specified depth. After it is in place, the system is connected to high voltage to perform reliability tests such as discharge. If an arc vibration occurs during the test, the vibration force generated by the front plug 13 will be transmitted to the second arc block 44, causing the fourth spring 43 to undergo dynamic compression deformation. At the same time, the slight axial displacement of the front plug 13 will be transmitted through the end cap 28, and relative sliding will occur in the axial floating gap reserved between the connector 26 and the guide ring 29. After the test is completed, each cylinder and motor will move in opposite directions to reset to the initial state, and the front plug 13 will be removed.

[0044] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A high-voltage plug reliability testing machine, comprising a base (1); characterized in that: A connecting plate (2) is installed on the top of the base (1). Uprights (7) are fixedly installed on the top of the connecting plate (2) near the four sides. A top plate (8) is fixedly installed on the top of the uprights (7). A movable plate (6) is slidably connected to the outer periphery of the uprights (7). A geared motor (3) is fixedly installed at the middle position of the bottom of the inner cavity of the base (1). A first lead screw (4) is fixedly installed on the end of the power output shaft of the geared motor (3). The top of the first lead screw (4) moves through the top of the connecting plate (2) and is rotatably connected to the bottom of the top plate (8). A first threaded sleeve (5) is threadedly connected to the outer periphery of the first lead screw (4). The first threaded sleeve (5) penetrates the top of the movable plate (6). The top of the movable plate (6) is fixedly installed with a placement plate (11) near both sides. The top of the top plate (8) is fixedly installed with a support frame (9). The top of the inner cavity of the support frame (9) is fixedly installed with an outdoor terminal (10). The middle position of the top of the placement plate (11) is fixedly installed with a placement tray (14). The top of the placement tray (14) is provided with a front plug (13). The front and rear sides of the front plug (13) are provided with sealing components. The two sides of the front plug (13) are jointly provided with pressing components. The top of the front plug (13) is provided with a test component. The sealing assembly includes a positioning cylinder (12) fixedly installed on the top of the placement plate (11). A first flange (21) is fixedly installed at the rear end of the positioning cylinder (12). A second flange (22) is provided on the rear side of the first flange (21). A connector (26) is provided on the rear side of the second flange (22). A sealing head (28) is provided on the rear side of the connector (26). The rear side of the sealing head (28) is movably inserted into the inner cavity of the front plug (13). A cylindrical pressure sensor (27) is fixedly installed on the front side of the sealing head (28). (26) has a cross groove (30) on its outer periphery, and a cross block (31) is slidably connected to the inner cavity of the cross groove (30). A guide ring (29) is fixedly installed on the front side of the end cap (28). A movable opening is opened on both sides of the guide ring (29), and a connecting block is fixedly installed in the inner cavity of the movable opening. A fastening bolt (32) is movably passed through the connecting block. The opposite ends of the fastening bolt (32) are threaded onto the cross block (31). A three-way four-way solenoid valve (47) is fixedly installed on the top of the moving plate (6) near the other side.

2. The high-voltage plug reliability testing machine according to claim 1, characterized in that: The second flange (22) is connected to a clamping ring (24) by an external thread. The clamping ring (24) is engaged with the outer periphery of the connector (26). An adjusting nut (23) is threadedly connected to the outer periphery of the second flange (22) near the front end, and the rear side of the adjusting nut (23) is fitted with the clamping ring (24).

3. A high-voltage plug-in reliability testing machine according to claim 2, characterized in that: An air cushion (25) is fixedly installed in the inner cavity of the clamping ring (24). The inner circumference of the air cushion (25) is fitted to the connector (26), and the cross-section of the air cushion (25) is hollow.

4. The high-voltage plug reliability testing machine according to claim 1, characterized in that: The pressing assembly includes a side plate (17) installed on one side of the placement tray (14). Several first T-shaped rods (18) are movably passed through one side of the side plate (17). A first arc-shaped block (45) is fixedly installed between two adjacent first T-shaped rods (18). A first spring (20) is movably sleeved on the outer periphery of each first T-shaped rod (18) near the other end. The two ends of the first spring (20) are fixedly connected to the side plate (17) and the first arc-shaped block (45) respectively. A retaining ring (19) is fixedly sleeved on the outer periphery of each first T-shaped rod (18) near the middle position. A support frame (15) is installed on the other side of the placement tray (14). A clamping cylinder (16) is installed on the top of (15). A rectangular plate (37) is installed at the end of the clamping cylinder (16). A movable plate (41) is provided on one side of the rectangular plate (37). Several second T-shaped rods (42) are movably passed through the other side of the movable plate (41). A second arc-shaped block (44) is fixedly installed at the ends of two adjacent second T-shaped rods (42). A fourth spring (43) is movably sleeved on the outer periphery of the second T-shaped rod (42). The two ends of the fourth spring (43) are fixedly connected to the adjacent second arc-shaped block (44) and the movable plate (41) respectively. The elastic force of the fourth spring (43) is greater than that of the first spring (20).

5. A high-voltage plug-in reliability testing machine according to claim 1, characterized in that: The test assembly includes a conductive post installed at the bottom of an outdoor terminal (10), an insulating sleeve (33) is provided on the outer periphery of the outdoor terminal (10), the insulating sleeve (33) is located on the outer periphery of the conductive post, a second spring (35) is fixedly installed at the bottom of the outdoor terminal (10), and a protective sleeve (34) is fixedly installed at the bottom end of the second spring (35), the protective sleeve (34) is located on the inner periphery of the insulating sleeve (33).

6. A high-voltage plug reliability testing machine according to claim 5, characterized in that: The bottom of the outdoor terminal (10) is fixedly installed with a third spring (36), and the third spring (36) is located on the outer periphery of the second spring (35).

7. A high-voltage plug reliability testing machine according to claim 4, characterized in that: A thin-film pressure sensor (46) is fixedly installed on the opposite side of the first arc block (45) and the second arc block (44), and an adjustment structure is provided between the movable plate (41) and the rectangular plate (37).

8. A high-voltage plug reliability testing machine according to claim 7, characterized in that: The adjustment structure includes a second lead screw (39) rotatably connected to the rear side of the inner cavity of the rectangular plate (37). The front end of the second lead screw (39) movably passes through the front side of the inner cavity of the rectangular plate (37) and is fixedly installed with a drive button. The outer periphery of the rectangular plate (37) is threadedly connected with a second threaded sleeve (38). One side of the second threaded sleeve (38) is fixedly connected to the movable plate (41). The front side of the second threaded sleeve (38) near the top and bottom is movably connected with guide rods (40). The front and rear ends of the guide rods (40) are fixedly connected to the front and rear sides of the inner cavity of the rectangular plate (37) respectively.

9. A high-voltage plug reliability testing machine according to claim 4, characterized in that: The compression stroke of the first spring (20) is less than that of the fourth spring (43).

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