No-partial discharge ac withstand voltage test device

Abstract

The present application relates to the technical field of pressure test device, and discloses an AC voltage withstand test device without partial discharge, which comprises a carriage, a side door, a tail door and a top cover rotatably arranged on the carriage, and a test system, a driving mechanism, a synchronous assembly and two sets of rotating mechanisms installed inside the carriage; the test system comprises a console, a high-voltage generating unit and a voltage divider, a high-voltage connecting pipe is connected between the high-voltage generating unit and the voltage divider, the driving mechanism is connected to the high-voltage generating unit, and the synchronous assembly is installed between the high-voltage generating unit and the voltage divider. Through the cooperative design of the driving mechanism, the synchronous assembly and the rotating mechanism, the posture switching of the high-voltage generating unit and the voltage divider is realized, the top cover is synchronously opened and closed, the sequence confusion and equipment interference caused by separate operation are avoided, the bendable high-voltage connecting pipe does not need to be disassembled on site, the adaptive deformation of the equipment posture switching is adapted, the damage risk in the equipment carrying process is reduced, and the work efficiency and test effect are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of withstand voltage testing devices, specifically, it relates to an AC withstand voltage testing device without partial discharge. Background Technology

[0002] In the insulation testing system of high-voltage electrical equipment, partial discharge is an early sign of insulation deterioration. If it is not detected and dealt with in time, it may lead to insulation breakdown and cause major power accidents. The AC withstand voltage test device without partial discharge is a professional testing equipment designed to meet this need. It can measure and evaluate the partial discharge level of the insulation system while simulating the actual operating conditions of the equipment. It is widely used in the factory test, acceptance test and preventive test of high-voltage equipment such as power transformers, instrument transformers, and GIS switchgear. It is an indispensable technical means for power equipment manufacturers, power grid operation and maintenance departments and third-party testing institutions.

[0003] However, in actual use, it was found that after the equipment was transported to the required location, the high-voltage generating unit and voltage divider had to be lifted off the transport carrier by a crane before on-site wiring operations could be carried out. This was not only time-consuming and labor-intensive, but also prone to equipment collision damage during the crane lifting process. In addition, the on-site wiring was complicated, the test equipment was large and difficult to operate, which increased the workload of the staff and extended the equipment downtime.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A partial discharge-free AC withstand voltage test device includes a carriage, on which a side door, a rear door, and a top cover are rotatably mounted. Inside the carriage are a test system, a drive mechanism, a synchronization component, and two sets of rotating mechanisms. The test system includes a control console, a high voltage generating unit, and a voltage divider. A high voltage connecting pipe connects the high voltage generating unit and the voltage divider.

[0007] A drive mechanism is connected to the high-voltage generating unit, a synchronization component is installed between the high-voltage generating unit and the voltage divider, and a rotation mechanism is installed between the top cover and the high-voltage generating unit and the voltage divider, respectively.

[0008] The high-voltage generating unit and the voltage divider are respectively connected to a first rotating shaft and a second rotating shaft, and the high-voltage generating unit and the voltage divider are rotatably installed in the carriage via the first rotating shaft and the second rotating shaft, respectively.

[0009] In a preferred embodiment of the present invention, hinges are installed at the connection points between the side door, the tail door, and the top cover and the carriage. The side door is hinged to the side wall of the carriage via the hinges, the tail door is hinged to the rear of the carriage via the hinges, and the top cover is hinged to the top of the carriage via the hinges. Sealing gaskets are fitted between the side door, the tail door, the top cover and the carriage.

[0010] In a preferred embodiment of the present invention, the test system further includes an isolation power supply box and a partial discharge instrument. The control console, the isolation power supply box, and the partial discharge instrument are all fixedly installed on the bottom surface inside the carriage. The high-voltage connecting pipe is provided with a conductive core composed of multiple strands of soft copper wire, and the high-voltage connecting pipe is covered with a silicone rubber insulating corrugated pipe.

[0011] In a preferred embodiment of the present invention, a first base and a second base are fixedly installed inside the carriage, and a first rotating shaft and a second rotating shaft are rotatably installed on the first base and the second base, respectively. The high-voltage generating unit and the voltage divider are rotatably installed on the first base and the second base through the first rotating shaft and the second rotating shaft, respectively.

[0012] In a preferred embodiment of the present invention, the driving mechanism includes a mounting base and a hydraulic cylinder. The mounting base is fixedly installed inside the carriage, and a first rotating shaft is rotatably mounted on the mounting base. A hydraulic cylinder is connected to the first rotating shaft, and a second rotating shaft is rotatably mounted on the telescopic end of the hydraulic cylinder. The second rotating shaft is connected to the side wall of the high-pressure generating unit.

[0013] In a preferred embodiment of the present invention, the synchronization component includes a guide rod, a crossbar, and a telescopic rod. The guide rod is vertically installed in the carriage, and the crossbar is slidably installed on the guide rod. Two telescopic rods are symmetrically slidably installed inside the crossbar. A first rotating shaft is fixedly connected to the outside of the high-voltage generating unit, and a second rotating shaft is fixedly connected to the outside of the voltage divider. The ends of the two telescopic rods are respectively hinged to the first rotating shaft and the second rotating shaft.

[0014] In a preferred embodiment of the present invention, the rotating mechanism includes a circular plate, a sliding rod and a driving block, and a circular plate is mounted on both the first rotating shaft and the second rotating shaft, and a cam groove is formed on the circular plate.

[0015] In a preferred embodiment of the present invention, guide sleeves are fixed to the inner walls of the left and right sides of the carriage, and a sliding rod is slidably installed in the guide sleeve. A cam is fitted at the lower end of the sliding rod, and the cam is slidably installed in the cam groove.

[0016] In a preferred embodiment of the present invention, a driving block is installed at the bottom of the top cover, the driving block is provided with an inclined surface and a raised edge, and a slider is fixedly provided at the upper end of the sliding rod, the slider cooperating with the raised edge.

[0017] In a preferred embodiment of the present invention, a magnetic closing structure is provided at the closed connection between the top cover and the carriage. The magnetic closing structure is arranged around the edge of the top cover and magnetically fits into the top edge of the carriage.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] This invention achieves attitude switching between the high-voltage generating unit and the voltage divider through the coordinated design of the drive mechanism, synchronization component and rotation mechanism. At the same time, the top cover opens and closes synchronously, avoiding the sequence confusion and equipment interference caused by individual operation. The flexible high-voltage connecting pipe does not require on-site disassembly and assembly, adapts to the adaptive deformation during equipment attitude switching, ensures stable connection of the high-voltage circuit, reduces the risk of damage during equipment handling, and improves work efficiency and test results.

[0020] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0021] In the attached diagram:

[0022] Figure 1 A 3D view of the carriage without a partial discharge AC withstand voltage test device;

[0023] Figure 2 A cross-sectional view of the carriage without a partial discharge AC withstand voltage test device;

[0024] Figure 3 This is a schematic diagram of the structure inside the carriage without a partial discharge AC withstand voltage test device.

[0025] Figure 4 A bottom view of the drive mechanism and rotating mechanism of the AC withstand voltage test device without partial discharge;

[0026] Figure 5 Side view of the drive mechanism and rotating mechanism of the AC withstand voltage test device without partial discharge;

[0027] Figure 6 This is a schematic diagram of the installation of the rotating mechanism of the AC withstand voltage test device without partial discharge;

[0028] Figure 7 For partial discharge AC withstand voltage test device Figure 6 Enlarged view of point A in the middle;

[0029] Figure 8 This is a schematic diagram of the installation of the high-voltage generating unit and voltage divider of the AC withstand voltage test device without partial discharge;

[0030] Figure 9 This is a schematic diagram of the installation of the synchronization components of the partial discharge-free AC withstand voltage test device.

[0031] In the diagram: 1. Carriage; 2. Side door; 3. Tail door; 4. Top cover; 5. Hinge; 6. Control console; 7. Isolation power supply box; 8. Partial discharge instrument; 9. High voltage generating unit; 10. Voltage divider; 11. High voltage connecting pipe; 121. First base; 122. Second base; 131. First rotating shaft; 132. Second rotating shaft; 14. Mounting seat; 15. First rotating shaft; 16. Hydraulic cylinder; 17. Second rotating shaft; 18. First rotating shaft; 19. Second rotating shaft; 20. Guide rod; 21. Crossbar; 22. Telescopic rod; 23. Circular plate; 24. Cam groove; 25. Guide sleeve; 26. Sliding rod; 27. Cam; 28. Drive block; 281. Inclined surface; 282. Protruding edge; 29. ​​Slider. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0033] like Figures 1 to 9 As shown, the AC withstand voltage test device without partial discharge includes a carriage 1. The carriage 1 is rotatably equipped with a side door 2, a tail door 3, and a top cover 4. The carriage 1 is equipped with a test system, a drive mechanism, a synchronization component, and two sets of rotating mechanisms. The test system includes a control console 6, a high voltage generating unit 9, and a voltage divider 10. A high voltage connecting pipe 11 connects the high voltage generating unit 9 and the voltage divider 10.

[0034] A drive mechanism is connected to the high-voltage generating unit 9. A synchronization component is installed between the high-voltage generating unit 9 and the voltage divider 10. Rotation mechanisms are installed between the top cover 4 and the high-voltage generating unit 9 and the voltage divider 10, respectively.

[0035] The high-voltage generating unit 9 and the voltage divider 10 are respectively connected to a first rotating shaft 131 and a second rotating shaft 132. The high-voltage generating unit 9 and the voltage divider 10 are rotatably mounted in the carriage 1 via the first rotating shaft 131 and the second rotating shaft 132. In this configuration, the side door 2, the tail door 3, and the top cover 4 are arranged in different positions in the carriage 1, forming a multi-directional opening and closing structure. The test system, drive mechanism, synchronization component, and rotation mechanism are centrally arranged in the interior space of the carriage 1. Relying on the mutual cooperation and linkage of each mechanism, the high-voltage generating unit 9 and the voltage divider 10 can switch between their retracted and upright positions. At the same time, the rotation mechanism is used to control the synchronous opening and closing of the top cover 4, reducing individual operation steps and improving the overall linkage of the device.

[0036] like Figures 1 to 9As shown in the specific embodiment, hinges 5 are installed at the connection points between the side door 2, the tail door 3, and the top cover 4 and the carriage 1. The side door 2 is hinged to the side wall of the carriage 1 via the hinges 5, the tail door 3 is hinged to the rear of the carriage 1 via the hinges 5, and the top cover 4 is hinged to the top of the carriage 1 via the hinges 5. Sealing gaskets are fitted between the side door 2, the tail door 3, the top cover 4, and the carriage 1. In this configuration, the hinges 5 respectively rotatably connect the side door 2, the tail door 3, and the top cover 4 to the carriage 1, ensuring that each door panel can be flipped open and closed. The sealing gaskets are fitted into the gaps between the door panels and the carriage 1, filling the gaps after the door panels are closed.

[0037] like Figures 1 to 9 As shown, the test system further includes an isolation power supply box 7 and a partial discharge instrument 8. The control console 6, isolation power supply box 7, and partial discharge instrument 8 are all fixedly installed on the bottom surface inside the carriage 1. The high-voltage connecting pipe 11 has a conductive core composed of multiple strands of soft copper wire inside, and the outside of the high-voltage connecting pipe 11 is covered with a silicone rubber insulating corrugated pipe. In this setup, the control console 6, isolation power supply box 7, and partial discharge instrument 8 form an integrated test support structure, providing power supply, control, and detection support for the test operation of the high-voltage generating unit 9 and the voltage divider 10. Relying on its flexible structural characteristics, the high-voltage connecting pipe 11 adaptively deforms when the high-voltage generating unit 9 and the voltage divider 10 switch postures, always stably connecting the two sets of equipment and ensuring continuous conduction of the high-voltage circuit.

[0038] like Figures 1 to 9 As shown, furthermore, a first base 121 and a second base 122 are fixedly installed inside the carriage 1. A first rotating shaft 131 and a second rotating shaft 132 are rotatably mounted on the first base 121 and the second base 122, respectively. The high-voltage generating unit 9 and the voltage divider 10 are rotatably mounted on the first base 121 and the second base 122 via the first rotating shaft 131 and the second rotating shaft 132, respectively. In this configuration, the first base 121 and the second base 122 respectively limit the rotation of the first rotating shaft 131 and the second rotating shaft 132, thereby limiting the rotation of the high-voltage generating unit 9 and the voltage divider 10, ensuring the installation stability and motion regularity of the equipment during attitude switching.

[0039] like Figures 1 to 9 As shown, the drive mechanism further includes a mounting base 14 and a hydraulic cylinder 16. The mounting base 14 is fixedly installed inside the carriage 1. A first rotating shaft 15 is rotatably mounted on the mounting base 14. The hydraulic cylinder 16 is connected to the first rotating shaft 15. A second rotating shaft 17 is rotatably mounted on the telescopic end of the hydraulic cylinder 16. The second rotating shaft 17 is connected to the side wall of the high-pressure generating unit 9. In this configuration, the mounting base 14 allows the hydraulic cylinder 16 to deflect slightly around the first rotating shaft 15. The telescopic end of the hydraulic cylinder 16 forms a rotational transmission engagement with the high-pressure generating unit 9 through the second rotating shaft 17, thereby transmitting hydraulic driving force to the high-pressure generating unit 9.

[0040] like Figures 1 to 9 As shown, the synchronization assembly further includes a guide rod 20, a crossbar 21, and a telescopic rod 22. The guide rod 20 is vertically installed in the carriage 1, and the crossbar 21 is slidably installed on the guide rod 20. Two telescopic rods 22 are symmetrically slidably installed inside the crossbar 21. A first rotating shaft 18 is fixedly connected to the outside of the high-voltage generating unit 9, and a second rotating shaft 19 is fixedly connected to the outside of the voltage divider 10. The ends of the two telescopic rods 22 are hinged to the first rotating shaft 18 and the second rotating shaft 19, respectively. In this configuration, the guide rod 20 provides sliding limit guidance for the crossbar 21. The crossbar 21, relying on the telescopic rod 22, the first rotating shaft 18, and the second rotating shaft 19, allows the high-voltage generating unit 9 to synchronously drive the voltage divider 10 to rotate in the opposite direction.

[0041] like Figures 1 to 9 As shown, the rotating mechanism further includes a circular plate 23, a sliding rod 26, and a driving block 28. Circular plates 23 are mounted on both the first rotating shaft 131 and the second rotating shaft 132, and cam grooves 24 are formed on the circular plates 23. In this configuration, the first rotating shaft 131 and the second rotating shaft 132 synchronously drive the circular plates 23 to rotate synchronously during rotation. The cam grooves 24 formed on the surface of the circular plates 23 form a trajectory limiting structure, converting the rotational motion into a vertical driving stroke.

[0042] like Figures 1 to 9 As shown, furthermore, guide sleeves 25 are fixed to the inner walls of both sides of the carriage 1. A sliding rod 26 is slidably installed in the guide sleeve 25, and a cam 27 is fitted at the lower end of the sliding rod 26. The cam 27 is slidably installed in the cam groove 24. In this configuration, the guide sleeve 25 provides vertical sliding constraint to the sliding rod 26, and the cam 27 is fitted and limited inside the cam groove 24, following the trajectory to move, thus converting the rotation of the circular plate 23 into the up-and-down linear reciprocating motion of the sliding rod 26, realizing the connection and transmission between the rotating mechanism and the drive structure.

[0043] like Figures 1 to 9 As shown, furthermore, a drive block 28 is installed at the bottom of the top cover 4. The drive block 28 is provided with an inclined surface 281 and a raised edge 282. A slider 29 is fixedly provided at the upper end of the sliding rod 26, and the slider 29 cooperates with the raised edge 282. In this configuration, the drive block 28 relies on the inclined surface 281 to support the upward pushing force of the sliding rod 26, thereby driving the top cover 4 to flip open. At the same time, the contour structure formed by the raised edge 282 cooperates with the slider 29 to limit the movement, forming a pulling force when the sliding rod 26 moves downward, thereby driving the top cover 4 to rotate and close in the opposite direction.

[0044] like Figures 1 to 9As shown, a magnetic closure structure is further provided at the closing connection between the top cover 4 and the carriage 1. The magnetic closure structure is arranged around the edge of the top cover 4 and magnetically attaches to the top edge of the carriage 1. In this configuration, the magnetic closure structure is arranged along the entire edge of the top cover 4. After the top cover 4 is rotated and closed, it forms a magnetic attachment with the top edge of the carriage 1, helping the top cover 4 to maintain a closed and fitted state. This, together with the sealing gaskets at various locations, further compacts the closing gaps and improves the sealing performance of the top of the carriage 1 after it is closed.

[0045] The implementation principle of the AC withstand voltage test device without partial discharge in this embodiment is as follows: Under normal transportation and storage conditions, the high voltage generating unit 9 and the voltage divider 10 are placed in a horizontal storage position inside the carriage 1. The high voltage connecting pipe 11 between the high voltage generating unit 9 and the voltage divider 10 naturally bends and adapts with the storage position of the two units. The top cover 4, the side door 2 and the tail door 3 are all kept closed. The top cover 4 relies on the magnetic closing structure set on the edge to magnetically adhere to the top edge of the carriage 1, and the sealing gasket achieves the sealing of the closed position.

[0046] When high-pressure testing is required, the hydraulic cylinder 16 in the drive mechanism begins to extend. The hydraulic cylinder 16 deflects at an angle with the first rotating shaft 15 on the mounting base 14 as the fulcrum. The extension end of the hydraulic cylinder 16 applies a thrust to the high-pressure generating unit 9 through the second rotating shaft 17, causing the high-pressure generating unit 9 and the first rotating shaft 131 to rotate on the first base 121. As the high-voltage generating unit 9 rotates, it drives the first rotating shaft 18 fixed on the outside to deflect synchronously. The first rotating shaft 18 pulls the telescopic rod 22 on the corresponding side to generate displacement. The telescopic rod 22 drives the crossbar 21 to slide vertically along the guide rod 20 fixed inside the carriage 1. During the sliding process of the crossbar 21, it drives the telescopic rod 22 on the other side to move synchronously. The telescopic rod 22 on this side pulls the second rotating shaft 19, thereby driving the voltage divider 10 and the second rotating shaft 132 to rotate synchronously in opposite directions on the second base 122, so that the high-voltage generating unit 9 and the voltage divider 10 rotate and unfold synchronously in opposite directions. The high-voltage connecting pipe 11 adapts to the bending deformation of the two units according to their rotation angle, and continuously maintains the connection between the high-voltage generating unit 9 and the voltage divider 10.

[0047] During the continuous rotation and erection of the high-pressure generating unit 9 and the voltage divider 10, the first rotating shaft 131 and the second rotating shaft 132 will synchronously drive the circular plates 23 mounted on their respective shafts to rotate coaxially. When the circular plates 23 rotate, the cam grooves 24 opened on their surfaces will synchronously deflect. The groove walls of the cam grooves 24 will continuously abut against and push the cam 27, causing the cam 27 to produce vertical displacement along the contour trajectory of the cam grooves 24. The cam 27 will drive the sliding rod 26 to slide smoothly upward along the guide sleeve 25 fixed to the inner wall of the carriage 1. During the upward movement of the sliding rod 26, the end of the sliding rod 26 presses against the inclined surface 281 of the bottom drive block 28 of the top cover 4, pushing the drive block 28 upward, thereby causing the top cover 4 to flip upward and open with the hinge 5 as the pivot point, removing the obstruction at the top of the carriage 1, and providing clearance for the high voltage generating unit 9 and the voltage divider 10 to stand completely vertically until the high voltage generating unit 9 and the voltage divider 10 rotate to the vertical working position, so that they can cooperate with the control console 6, the isolation power supply box 7, and the partial discharge instrument 8 to complete the subsequent partial discharge withstand voltage test.

[0048] After all the test operations are completed, the hydraulic cylinder 16 gradually retracts and resets, pulling the high-pressure generating unit 9 to rotate in the opposite direction. The high-pressure generating unit 9 drives the pressure divider 10 to rotate synchronously in the opposite direction through the synchronization component. The two units gradually rotate from a vertical posture to a horizontal storage posture. The first rotating shaft 131 and the second rotating shaft 132 follow the rotation, driving the circular plate 23 to rotate in the opposite direction. The cam groove 24 drives the cam 27 to move down in the opposite direction, causing the sliding rod 26 to slide down and reset along the guide sleeve 25. When the sliding rod 26 moves down, the slider 29 cooperates with the protrusion 282 of the drive block 28. Through the limiting and pulling action of the protrusion 282, the drive block 28 is driven to fall down, causing the top cover 4 to rotate in the opposite direction and close. After the top cover 4 rotates back to the initial position, it is magnetically attached and sealed with the carriage 1 again by the magnetic closing structure. The high-pressure generating unit 9 and the pressure divider 10 completely return to the horizontal storage position, and the whole is restored to the transportation and storage state.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A partial discharge-free AC withstand voltage test device, comprising a carriage (1), characterized in that, The carriage (1) is rotatably equipped with a side door (2), a tail door (3) and a top cover (4). The carriage (1) is equipped with a test system, a drive mechanism, a synchronization component and two sets of rotating mechanisms. The test system includes a control console (6), a high-voltage generating unit (9) and a voltage divider (10). A high-voltage connecting pipe (11) is connected between the high-voltage generating unit (9) and the voltage divider (10). A drive mechanism is connected to the high-voltage generating unit (9), a synchronization component is installed between the high-voltage generating unit (9) and the voltage divider (10), and a rotation mechanism is installed between the top cover (4) and the high-voltage generating unit (9) and the voltage divider (10). The high-pressure generating unit (9) and the voltage divider (10) are respectively connected to a first rotating shaft (131) and a second rotating shaft (132). The high-pressure generating unit (9) and the voltage divider (10) are rotatably installed in the carriage (1) via the first rotating shaft (131) and the second rotating shaft (132).

2. The AC withstand voltage test device without partial discharge according to claim 1, characterized in that, The side door (2), tail door (3) and top cover (4) are all fitted with hinges (5) at the connection points with the carriage (1). The side door (2) is hinged to the side wall of the carriage (1) by the hinges (5), the tail door (3) is hinged to the rear of the carriage (1) by the hinges (5), and the top cover (4) is hinged to the top of the carriage (1) by the hinges (5). The side door (2), tail door (3), top cover (4) and carriage (1) are all fitted with sealing gaskets.

3. The partial discharge-free AC withstand voltage test device according to claim 1, characterized in that, The test system also includes an isolation power supply box (7) and a partial discharge instrument (8). The control console (6), the isolation power supply box (7), and the partial discharge instrument (8) are all fixedly installed on the bottom of the carriage (1). The high voltage connecting pipe (11) is equipped with a conductive core composed of multiple strands of soft copper wire. The high voltage connecting pipe (11) is covered with a silicone rubber insulating corrugated pipe.

4. The AC withstand voltage test device without partial discharge according to claim 1, characterized in that, The carriage (1) is fixedly installed with a first base (121) and a second base (122). A first rotating shaft (131) and a second rotating shaft (132) are rotatably installed on the first base (121) and the second base (122), respectively. The high-voltage generating unit (9) and the voltage divider (10) are rotatably installed on the first base (121) and the second base (122) through the first rotating shaft (131) and the second rotating shaft (132), respectively.

5. The AC withstand voltage test device without partial discharge according to claim 1, characterized in that, The drive mechanism includes a mounting base (14) and a hydraulic cylinder (16). The mounting base (14) is fixedly installed inside the carriage (1). A first rotating shaft (15) is rotatably mounted on the mounting base (14). A hydraulic cylinder (16) is connected to the first rotating shaft (15). A second rotating shaft (17) is rotatably mounted on the telescopic end of the hydraulic cylinder (16). The second rotating shaft (17) is connected to the side wall of the high-pressure generating unit (9).

6. The AC withstand voltage test device without partial discharge according to claim 1, characterized in that, The synchronization component includes a guide rod (20), a crossbar (21), and a telescopic rod (22). The guide rod (20) is vertically installed in the carriage (1). The crossbar (21) is slidably installed on the guide rod (20). Two telescopic rods (22) are symmetrically slidably installed inside the crossbar (21). A first rotating shaft (18) is fixedly connected to the outside of the high-voltage generating unit (9). A second rotating shaft (19) is fixedly connected to the outside of the voltage divider (10). The ends of the two telescopic rods (22) are respectively hinged to the first rotating shaft (18) and the second rotating shaft (19).

7. The partial discharge-free AC withstand voltage test device according to claim 4, characterized in that, The rotating mechanism includes a circular plate (23), a sliding rod (26) and a driving block (28). The first rotating shaft (131) and the second rotating shaft (132) are both equipped with circular plates (23), and the circular plates (23) are provided with cam grooves (24).

8. The AC withstand voltage test device without partial discharge according to claim 7, characterized in that, Guide sleeves (25) are fixed on the inner walls of the left and right sides of the carriage (1). A sliding rod (26) is slidably installed in the guide sleeve (25). A cam (27) is fitted at the lower end of the sliding rod (26). The cam (27) is slidably installed in the cam groove (24).

9. The AC withstand voltage test device without partial discharge according to claim 7, characterized in that, The top cover (4) is equipped with a drive block (28) at the bottom. The drive block (28) is provided with an inclined surface (281) and a raised edge (282). The upper end of the sliding rod (26) is fixed with a slider (29), which cooperates with the raised edge (282).

10. The AC withstand voltage test device without partial discharge according to claim 2, characterized in that, A magnetic closing structure is provided at the closed connection between the top cover (4) and the carriage (1). The magnetic closing structure is arranged around the edge of the top cover (4) and magnetically attached to the top edge of the carriage (1).

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