Withstand voltage detection device of mutual inductor and use method of withstand voltage detection device

Abstract

The invention provides a mutual inductor withstand voltage detection device and a use method thereof, and relates to the technical field of mutual inductor withstand voltage detection.The withstand voltage detection device comprises a conveying table, a fixing plate is fixed to the surface of the conveying table, a rotating disc is rotationally installed at the top of the fixing plate through a bearing, and a bottom plate is installed at the top of the rotating disc; an inserting column is fixed to the bottom of the bottom plate, the inserting column is inserted into the circle center of the rotating disc in a threaded mode, placing boxes are symmetrically fixed to the circle center of the top of the bottom plate, and mutual inductor bodies are placed in the placing boxes. The mutual inductors are clamped through the clamping assembly and then are in butt joint with the detection device for voltage withstanding detection, meanwhile, the rotating assembly rotates the bottom plate, a new mutual inductor body is replaced to enter a detection position, the faulty mutual inductors are sent out from the sending-out table, voltage withstanding detection is efficiently conducted on the multiple sets of mutual inductors, meanwhile, the faulty mutual inductors are well screened, and the detection efficiency is improved. And the detection process is not interfered.

Description

Technical Field

[0001] The present invention relates to the technical field of withstand voltage detection of instrument transformers, and specifically provides a withstand voltage detection device for instrument transformers and a method for using the same. Background Art

[0002] An instrument transformer, also known as a measuring transformer, can transform high voltage into low voltage and large current into small current, and is used in measurement or protection systems to standardize and miniaturize measuring instruments, protection devices, and automatic control devices. During the production process, instrument transformers need to undergo withstand voltage testing to measure their voltage-bearing capacity. Under normal operating conditions, instrument transformers need to withstand a certain voltage and current load. If the withstand voltage capacity of an instrument transformer is insufficient, it will affect the normal operation of the instrument transformer and may even lead to safety accidents. The withstand voltage test is to test the maximum voltage and current load that an instrument transformer can withstand under normal operating conditions, so as to evaluate the safety and reliability of the instrument transformer.

[0003] The main index in the withstand voltage test is the insulation strength of the instrument transformer, that is, the instrument transformer will not experience breakdown when subjected to a certain voltage load. The specific method is as follows: Under working conditions, connect one side of the instrument transformer to an AC high-voltage power supply and the other side to ground, and continuously increase the voltage until the instrument transformer breaks down; during the test, parameters such as voltage, current, and time need to be recorded, and the appearance and insulation condition of the instrument transformer need to be checked before and after each test.

[0004] In the existing detection methods, the efficiency of continuous withstand voltage detection of instrument transformers is relatively low. For some instrument transformers with faults, they also need to be screened out after detection. Manual operation is time-consuming and laborious, and machine operation is likely to affect the detection efficiency of the remaining instrument transformers. Summary of the Invention

[0005] To solve the deficiencies in the prior art, the present invention provides a withstand voltage detection device for instrument transformers and a method for using the same to solve the technical problems that the efficiency of continuous withstand voltage detection of instrument transformers in the prior art is relatively low, and for some instrument transformers with faults, they also need to be screened out after detection, and manual operation is time-consuming and laborious, and machine operation is likely to affect the detection efficiency of the remaining instrument transformers.

[0006] The present invention adopts the following technical solutions.

[0007] The first aspect of the present invention discloses a withstand voltage detection device for an instrument transformer, including a conveying table. A fixed plate is fixed on the surface of the conveying table, and a turntable is rotatably installed on the top of the fixed plate. A bottom plate is installed on the top of the turntable. An insertion post is fixed to the bottom of the bottom plate, and the insertion post is inserted into the turntable. A placement box is fixed to the top of the bottom plate, and an instrument transformer body is placed inside the placement box. A fixed frame is fixed to the top of the conveying table, and a detection device is fixed to the fixed frame. The detection device is used for performing a withstand voltage detection on the instrument transformer body. A rotating assembly is provided outside the detection device. The rotating assembly includes a cross beam. The cross beam is fixed to the fixed frame, and a toothed ring is installed at the bottom of the cross beam. A telescopic rod is fixed to the bottom of one side of the toothed ring. A connecting plate is fixed to the bottom of the bottom plate corresponding to the position of the bottom of the telescopic rod, and a jack is opened on the surface of the connecting plate. The extending end of the telescopic rod can be inserted into the jack inside the connecting plate. A clamping assembly is provided on the cross beam. The clamping assembly includes a top plate. Two ends of the bottom of the top plate are fixed with sliding frames, and a plurality of clamping plates are slidably connected inside the sliding frames. The sliding frames and the clamping plates serve as clamps. A sending table is arranged on one side of the conveying table, and a collection box is placed on the surface of the sending table.

[0008] Further, a plurality of limiting plates are symmetrically arranged inside the placement box. The instrument transformer body is clamped between the limiting plates. Springs are fixed between the back surfaces of the limiting plates and the inner walls of the placement box. Slots are opened on the inner walls of the limiting plates, and the clamping plates penetrate into the slots and are in pressing contact with both sides of the instrument transformer body.

[0009] Further, the clamping assembly further includes a sliding plate. A sliding plate is installed on one side of the cross beam. A second motor is fixed to the sliding plate, and a second electric push rod is fixed to the bottom of the second motor. The extending end of the second electric push rod is fixedly connected to the top plate.

[0010] Further, a slide rail is fixed to the top of the cross beam. The sliding plate slides along the slide rail of the cross beam. A first electric push rod is fixed to the cross beam, and the extending end of the first electric push rod is fixedly connected to the sliding plate.

[0011] Further, a bidirectional electric push rod is fixed inside the sliding frame, and the two extending ends of the bidirectional electric push rod are fixedly connected to a plurality of clamping plates.

[0012] Further, the rotating assembly further includes a first motor. The first motor is fixed to the back surface of the fixed frame. A first gear is fixed to the output end of the first motor, and the first gear is meshed with the toothed ring.

[0013] Further, a ring groove is opened at the top of the toothed ring, and both ends of the cross beam slide along the inside of the ring groove.

[0014] Further, a vertical plate is fixed at the position between the telescopic rod and the top plate, and a second gear is rotatably installed on the bottom surface of the vertical plate. Tooth plates are meshed and connected to both sides of the second gear.

[0015] Further, a circular ring is fixed to the bottom of the extended end of the telescopic rod. A clamping frame is slidably clamped on the surface of the circular ring, and the tooth plate on one side of the second gear is fixedly connected to the clamping frame.

[0016] Further, clamping blocks are fixed to both sides of the center position of the top plate. A clamping groove is formed on the back surface of the tooth plate on the other side of the second gear, and the clamping blocks are inserted into the clamping grooves on the back surface of the tooth plate.

[0017] The second aspect of the present invention discloses a method for using a voltage withstand detection device for an instrument transformer, including the following steps:

[0018] Install multiple groups of fixed plates on the conveying table, and install the bottom plate and the placement box. Place the instrument transformer body to be detected in the placement box to complete the preparation work;

[0019] The clamping plate is inserted into the slot of the limiting plate, and the clamping plate clamps both sides of the instrument transformer body, connecting the instrument transformer body to the detection device for voltage withstand detection;

[0020] After the detection is completed, if the data of the instrument transformer body is normal, it is put back into the original placement box. If there are problems in the detection, move the clamping assembly outward to complete the replacement of the two sets of jigs. The new jig continues to clamp and detect the instrument transformer body, and the other set of jigs places the instrument transformer body with problems in the collection box.

[0021] The beneficial effects of the present invention are as follows. Compared with the prior art,

[0022] 1. The tooth plate on one side of the second gear of the present invention is slidably clamped on the circular ring through the clamping frame. Therefore, when the telescopic rod rotates along with the tooth ring, the telescopic rod can still be controlled to expand and contract through the tooth plate, and the size of the circular ring will not interfere with the detection and clamping processes. The tooth plate on the other side of the second gear is clamped with the clamping block of the top plate, and the top of the tooth plate is slidably inserted into the cross beam. When the top plate is pushed outwards, the clamping block is separated from the clamping groove of the tooth plate. Therefore, the tooth plate will not interfere with the rotation of the top plate. After the top plate rotates to replace the positions of the two jigs, it can still be inserted into the clamping groove of the tooth plate through the clamping block on the other side. Then, through the up and down movement of the top plate, the second gear is driven to rotate, and the kinetic energy is transmitted to the tooth plate on the other side, and the telescopic rod moves in the opposite direction to the top plate.

[0023] 2. When the top plate of the present invention moves downward, the toothed plate drives the second gear to rotate. The second gear meshes with the toothed plate on the other side, driving the telescopic rod to retract. When the top plate moves upward, the telescopic rod extends, and the extended end inserts into the inside of the connecting plate. At this time, the rotation of the toothed ring can drive the telescopic rod to move, thereby rotating the bottom plate and the four upper placement boxes to the detection position, facilitating the continuous clamping of the mutual inductor by the clamping assembly for detection. There is a balance position for their opposite movements, that is, the bottommost parts of the clamping assembly and the telescopic rod are both higher than the position of the placement box. At this time, it is convenient for the placement box to be sent out together with the conveying table to complete the detection of one group. By driving the first gear to rotate and mesh with the toothed ring by the first motor, the switching of the placement boxes on the bottom plate can be realized.

[0024] 3. When the second electric push rod of the present invention descends, the clamping plate inserts into the slot of the limiting plate. By the contraction of the bidirectional electric push rod, the two sides of the mutual inductor body are clamped by the clamping plate, and the second electric push rod drives it to move upward to connect the two connection ends of the mutual inductor body with the detection end and the grounding end of the detection device for withstand voltage detection. After the detection is completed, if the data of the mutual inductor body is normal, it is put back into the original placement box. If there is a problem with the detection, the first electric push rod pulls the sliding plate to slide along the top of the cross beam, moving the clamping assembly outward until there is enough rotation space and it will not collide with other structures, then the replacement of the two groups of jigs can be completed. The new jig continues to clamp and detect the mutual inductor body, and the other group of jigs places the problematic mutual inductor in the collection box.

[0025] 4. The clamping plate of the present invention can be inserted along the slot of the limiting plate, which is convenient for taking out the mutual inductor body. The four placement boxes are arranged around the center of the bottom plate. Based on the placement positions of the placement box facing the detection device and the mutual inductor body inside, the other placement boxes and mutual inductors will also become this state after rotation, keeping the detection end of the mutual inductor always corresponding to the detection device.

[0026] 5. Compared with the prior art, four mutual inductors are stored on one group of bottom plates. After the mutual inductor is clamped by the clamping assembly and docked with the detection device for withstand voltage detection, the rotating assembly rotates the bottom plate to replace a new mutual inductor body into the detection position and sends the faulty mutual inductor out of the sending table, realizing the efficient withstand voltage detection of multiple groups of mutual inductors and simultaneously screening the faulty mutual inductors well without interfering with the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a withstand voltage detection device for a mutual inductor of the present invention;

[0028] Figure 2 It is a schematic diagram of the separation of the bottom plate and the turntable of a withstand voltage detection device for a mutual inductor of the present invention;

[0029] Figure 3 Schematic top view of the rotating assembly of a withstand voltage detection device for an instrument transformer according to the present invention;

[0030] Figure 4 Schematic bottom view of the rotating assembly of a withstand voltage detection device for an instrument transformer according to the present invention;

[0031] Figure 5 Schematic connection diagram of the rotating assembly and the clamping assembly of a withstand voltage detection device for an instrument transformer according to the present invention;

[0032] Figure 6 Schematic structural diagram of the clamping assembly of a withstand voltage detection device for an instrument transformer according to the present invention;

[0033] Figure 7 Schematic internal structure diagram of the sliding frame of a withstand voltage detection device for an instrument transformer according to the present invention;

[0034] Figure 8 Schematic internal structure diagram of the placement box of a withstand voltage detection device for an instrument transformer according to the present invention.

[0035] In the figure: 1. Conveyor table; 11. Sending-out table; 12. Collection box; 13. Bottom plate; 14. Fixed plate; 15. Turntable; 16. Insertion post; 17. Placement box; 18. Limiting plate; 19. Spring; 110. Slot; 111. Instrument transformer body; 2. Fixed frame; 21. Detection device; 3. Rotating assembly; 31. First motor; 32. First gear; 33. Tooth ring; 34. Cross beam; 35. Ring groove; 36. Telescopic rod; 37. Ring; 38. Connecting plate; 39. Vertical plate; 310. Second gear; 311. Tooth plate; 312. Clamping frame; 4. Clamping assembly; 41. Slide plate; 42. First electric push rod; 43. Second motor; 44. Second electric push rod; 45. Top plate; 46. Sliding frame; 47. Clamping plate; 48. Block; 49. Bidirectional electric push rod. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the spirit of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1 to 8, Embodiment 1 of the present invention provides a withstand voltage detection device for an instrument transformer, including a conveying table 1. A fixed plate 14 is fixed on the surface of the conveying table 1, and a turntable 15 is rotatably installed on the top of the fixed plate 14 through a bearing. A bottom plate 13 is installed on the top of the turntable 15. An insertion post 16 is fixed to the bottom of the bottom plate 13, and the insertion post 16 is threadedly inserted at the center of the turntable 15. Four groups of placement boxes 17 are symmetrically fixed to the top center of the bottom plate 13, and an instrument transformer body 111 is placed inside the placement box 17. A fixed frame 2 is fixed to the top of the conveying table 1, and a detection device 21 is fixed at a position corresponding to one group of placement boxes 17. The detection device 21 is used to perform a withstand voltage test on the instrument transformer body 111. A rotation assembly 3 is provided outside the detection device 21. The rotation assembly 3 includes a cross beam 34. The cross beam 34 is fixed to the fixed frame 2, and a toothed ring 33 is installed at the bottom of the cross beam 34. A telescopic rod 36 is fixed to the bottom of one side of the toothed ring 33. A connecting plate 38 is fixed to the bottom of the bottom plate 13 corresponding to the bottom of the telescopic rod 36, and a jack is provided on the surface of the connecting plate 38. The extended end of the telescopic rod 36 can be inserted into the jack of the connecting plate 38. A clamping assembly 4 is provided at a position where the cross beam 34 is located at the bottom of the inner ring of the toothed ring 33. The clamping assembly 4 includes a top plate 45. Two sliding frames 46 are fixed to both ends of the bottom of the top plate 45, and two clamping plates 47 are slidably connected inside the sliding frames 46. One sliding frame 46 and two clamping plates 47 form a set of clamps. A sending table 11 is provided on one side of the conveying table 1, and a collection box 12 is placed on the surface of the sending table 11. When using the device, multiple groups of fixed plates 14 are installed on the conveying table 1, and a bottom plate 13 and a placement box 17 are installed on the turntable 15 at the top of each group of fixed plates 14. The instrument transformer body 111 to be detected is placed in the placement box 17 and sent to the detection position by the conveying table 1. The clamping assembly 4 clamps the instrument transformer body 111 and contacts the detection device 21 for a withstand voltage test. The qualified instrument transformers are put back into the original placement box 17. By rotating the bottom plate 13 through the rotation assembly 3, a new instrument transformer is replaced and sent to the detection position to achieve continuous detection. The problematic instrument transformers are rotated by the clamping assembly 4 and placed in the collection box 12 and sent out separately by the sending table 11, which is convenient for screening out the faulty instrument transformers.

[0038] In this embodiment, two limiting plates 18 are symmetrically arranged inside the placement box 17. The current transformer body 111 is clamped between the two limiting plates 18. A spring 19 is fixed between the back surface of the limiting plate 18 and the inner wall of the placement box 17. Slots 110 are formed in the inner walls of the limiting plates 18, and the clamping plates 47 penetrate into the slots 110 and are in pressing contact with both sides of the current transformer body 111. The current transformer body 111 is placed inside the placement box 17 and is limited by the two limiting plates 18 and the spring 19 on both sides. The clamping plates 47 can be inserted into the slots 110 of the limiting plates 18, which facilitates the removal of the current transformer body 111. Four groups of placement boxes 17 are arranged around the center of the bottom plate 13. Taking the placement position of the placement box 17 facing the detection device 21 and the current transformer body 111 inside as the standard, the other placement boxes 17 and current transformers will also become this state after rotation, so as to keep the detection end of the current transformer always corresponding to the detection device 21.

[0039] In this embodiment, the clamping assembly 4 further includes a sliding plate 41. A sliding plate 41 is installed on one side of the cross beam 34. A second motor 43 is fixed at the middle position of the sliding plate 41 corresponding to the top plate 45. A second electric push rod 44 is fixed at the bottom of the second motor 43. The second motor 43 is used to drive the second electric push rod 44 to rotate, and the extending end of the second electric push rod 44 is fixedly connected to the top plate 45. A slide rail is fixed on the top of the cross beam 34. The sliding plate 41 slides along the slide rail of the cross beam 34. A first electric push rod 42 is fixed on the top surface of the cross beam 34, and the extending end of the first electric push rod 42 is fixedly connected to the sliding plate 41. A bidirectional electric push rod 49 is fixed inside the sliding frame 46, and the two extending ends of the bidirectional electric push rod 49 are fixedly connected to the two clamping plates 47. The sliding frame 46 and the clamping plates 47 close to the detection device 21 serve as the fixtures for the detection station. Through the lowering of the second electric push rod 44, the clamping plates 47 are inserted into the slots 110 of the limiting plates 18. Through the contraction of the bidirectional electric push rod 49, the clamping plates 47 clamp both sides of the current transformer body 111, and through the second electric push rod 44 driving it to move upward, the two connection ends of the current transformer body 111 are connected to the detection end and the grounding end of the detection device 21 for withstand voltage detection. After the detection is completed, if the data of the current transformer body 111 is normal, it is put back into the original placement box 17. If there are problems with the detection, the first electric push rod 42 pulls the sliding plate 41 to slide along the top of the cross beam 34, moves the clamping assembly 4 outward until there is enough rotation space and does not collide with other structures, then the replacement of the two sets of fixtures can be completed. The new fixture continues to clamp and detect the current transformer body 111, and the other set of fixtures places the current transformer body 111 with problems inside the collection box 12.

[0040] In this embodiment, the rotating assembly 3 further includes a first motor 31. The first motor 31 is fixed to the back surface of the fixed frame 2. The output end of the first motor 31 is fixed with a first gear 32, and the first gear 32 is meshed and connected with a toothed ring 33. A ring groove 35 is formed at the top of the toothed ring 33, and both ends of the cross beam 34 slide along the inside of the ring groove 35. A vertical plate 39 is fixed at the position of the cross beam 34 between the telescopic rod 36 and the top plate 45. A second gear 310 is rotatably installed on the bottom surface of the vertical plate 39 through a bearing. The two sides of the second gear 310 are meshed with a toothed plate 311. When the top plate 45 moves downward, the toothed plate 311 on one side drives the second gear 310 to rotate. The second gear 310 is meshed with the toothed plate 311 on the other side, driving the telescopic rod 36 to retract. When the top plate 45 moves upward, the telescopic rod 36 extends, and the extended end is inserted into the connecting plate 38. At this time, the rotation of the toothed ring 33 can drive the telescopic rod 36 to move, and then rotate the bottom plate 13 and the four groups of placement boxes 17 above to the detection position, facilitating the continuous clamping of the mutual inductor by the clamping assembly 4 for detection. There is a balance position for their opposite movements, that is, the bottommost parts of the clamping assembly 4 and the telescopic rod 36 are both higher than the position of the placement box 17. At this time, it is convenient for the placement box 17 to be sent out together with the conveying table 1 to complete the detection of one group. By driving the first gear 32 to rotate and mesh with the toothed ring 33 through the first motor 31, the switching of the placement box 17 on the bottom plate 13 can be realized.

[0041] In this embodiment, a circular ring 37 is fixed to the bottom of the extended end of the telescopic rod 36. A clamping frame 312 is slidably clamped on the surface of the circular ring 37, and the toothed plate 311 on one side of the second gear 310 is fixed to the clamping frame 312. Clamping blocks 48 are fixed on both sides of the center position of the top plate 45. A clamping groove is formed on the back surface of the toothed plate 311 on the other side of the second gear 310, and the clamping blocks 48 are inserted into the clamping groove on the back surface of the toothed plate 311. The toothed plate 311 on one side of the second gear 310 is slidably clamped on the circular ring 37 through the clamping frame 312. Therefore, when the telescopic rod 36 rotates along with the toothed ring 33, the telescopic rod 36 can still be controlled to expand and contract through the toothed plate 311, and the size of the circular ring 37 will not interfere with the detection and clamping processes. The toothed plate 311 on the other side of the second gear 310 is clamped with the clamping block 48 of the top plate 45, and the top of this toothed plate 311 is slidably inserted into the cross beam 34. When the top plate 45 is pushed outwards, the clamping block 48 is separated from the clamping groove of the toothed plate 311. Therefore, the toothed plate 311 will not interfere with the rotation of the top plate 45. After the top plate 45 rotates to replace the positions of the two jigs, the clamping block 48 on the other side can still be inserted into the clamping groove of the toothed plate 311. Then, through the up and down movement of the top plate 45, the second gear 310 is driven to rotate, and the kinetic energy is transmitted to the toothed plate 311 on the other side, and the telescopic rod 36 moves in the opposite direction to the top plate 45.

[0042] Embodiment 2 of the present invention provides a method for using a withstand voltage detection device for a mutual inductor, including the following steps:

[0043] When using the device, install multiple groups of fixed plates 14 on the conveying table 1, and install the bottom plate 13 and the placement box 17 on the turntable 15 at the top of each group of fixed plates 14. Place the mutual inductor body 111 to be detected in the placement box 17 to complete the preparation work. The mutual inductor body 111 is placed inside the placement box 17 and is limited by the two side limiting plates 18 and the spring 19. The clamping plate 47 can be inserted into the slot 110 of the limiting plate 18, which is convenient for taking out the mutual inductor body 111. The four groups of placement boxes 17 are arranged around the center of the bottom plate 13. Taking the placement position of the placement box 17 facing the detection device 21 and the mutual inductor body 111 inside as the standard, the other placement boxes 17 and the mutual inductors will also become this state after rotation, keeping the detection end of the mutual inductor always corresponding to the detection device 21.

[0044] It is sent to the detection position by the conveying table 1. The sliding frame 46 and the clamping plate 47 close to the detection device 21 serve as the fixtures at the detection station. Through the elongation of the second electric push rod 44, the clamping plate 47 is inserted into the slot 110 of the limiting plate 18. Through the contraction of the bidirectional electric push rod 49, the clamping plate 47 clamps both sides of the mutual inductor body 111, and drives it to move upward by shortening the second electric push rod 44, connecting the two connection ends of the mutual inductor body 111 with the detection end and the grounding end of the detection device 21 for voltage withstand detection.

[0045] After the detection is completed, if the data of the mutual inductor body 111 is normal, it is put back into the original placement box 17. If there are problems with the detection, the first electric push rod 42 pulls the slide plate 41 to slide along the top of the cross beam 34, moves the clamping assembly 4 outward until there is enough rotation space and it will not collide with other structures, then the replacement of the two sets of jigs can be completed. The new jig continues to clamp and detect the mutual inductor body 111, and the other set of jigs places the problematic mutual inductor body 111 inside the collection box 12. When the top plate 45 moves downward, the toothed plate 311 drives the second gear 310 to rotate. The second gear 310 meshes with the toothed plate 311 on the other side, driving the telescopic rod 36 to retract. When the top plate 45 moves upward, the telescopic rod 36 extends, and the extended end inserts into the connecting plate 38. At this time, the rotation of the toothed ring 33 can drive the telescopic rod 36 to move, and then rotate the bottom plate 13 and the four placement boxes 17 above to the detection position, facilitating the continuous clamping and detection of the mutual inductor body 111 by the clamping assembly 4. There is a balance position for their opposite movements, that is, the bottommost parts of the clamping assembly 4 and the telescopic rod 36 are both higher than the position of the placement box 17. At this time, it is convenient for the placement box 17 to be sent out together with the conveying platform 1 to complete the detection of one group. By driving the first gear 32 to rotate by the first motor 31 and meshing with the toothed ring 33, the switching of the placement box 17 on the bottom plate 13 can be realized. The toothed plate 311 on one side of the second gear 310 is slidably clamped on the circular ring 37 through the clamping frame 312. Therefore, when the telescopic rod 36 rotates with the toothed ring 33, the telescopic rod 36 can still be controlled to extend and retract by the toothed plate 311, and the size of the circular ring 37 will not interfere with the detection and clamping process. The toothed plate 311 on the other side of the second gear 310 is clamped with the block 48 of the top plate 45, and the top of this toothed plate 311 is slidably inserted into the cross beam 34. When the top plate 45 is pushed outwards, the block 48 is separated from the card slot of the toothed plate 311. Therefore, the toothed plate 311 will not interfere with the rotation of the top plate 45. After the top plate 45 rotates to replace the positions of the two jigs, it can still be inserted into the card slot of the toothed plate 311 through the block 48 on the other side. Then, by the up and down movement of the top plate 45, the second gear 310 is driven to rotate, and the kinetic energy is transmitted to the toothed plate 311 on the other side, and the telescopic rod 36 moves in the opposite direction to the top plate 45.

[0046] The beneficial effects of the present invention are that, compared with the prior art,

[0047] 1. The toothed plate on one side of the second gear of the present invention is slidably clamped on the ring through a clamping frame. Thus, when the telescopic rod rotates with the toothed ring, the telescopic rod can still be controlled to expand and contract through the toothed plate, and the size of the ring will not interfere with the detection and clamping process. The toothed plate on the other side of the second gear is clamped with the clamping block of the top plate, and the top of the toothed plate is slidably inserted into the cross beam. When the top plate is pushed outwards, the clamping block is separated from the clamping groove of the toothed plate. Therefore, the toothed plate will not interfere with the rotation of the top plate. After the top plate rotates to replace the positions of the two clamps, it can still be inserted into the clamping groove of the toothed plate through the clamping block on the other side. Thus, by the up and down movement of the top plate, the second gear is driven to rotate, and the kinetic energy is transmitted to the toothed plate on the other side, and the telescopic rod moves in the direction opposite to the top plate.

[0048] 2. When the top plate of the present invention moves downwards, the toothed plate drives the second gear to rotate. The second gear meshes with the toothed plate on the other side, driving the telescopic rod to retract. When the top plate moves upwards, the telescopic rod extends, and the extended end is inserted into the inside of the connecting plate. At this time, the rotation of the toothed ring can drive the telescopic rod to move, thus rotating the bottom plate and the four sets of placement boxes above to the detection position, facilitating the continuous clamping and detection of the mutual inductor by the clamping assembly. There is a balance position for their opposite movements, that is, the bottommost parts of both the clamping assembly and the telescopic rod are higher than the position of the placement box. At this time, it is convenient for the placement box to be sent out together with the conveying table to complete the detection of one group. By driving the first gear to rotate and mesh with the toothed ring through the first motor, the replacement of the placement box on the bottom plate can be realized.

[0049] 3. Through the descent of the second electric push rod of the present invention, the clamping plate is inserted into the slot of the limiting plate. Through the contraction of the bidirectional electric push rod, the two sides of the mutual inductor body are clamped by the clamping plate, and the second electric push rod drives it to move upwards to connect the two connection ends of the mutual inductor body with the detection end and the grounding end of the detection device for withstand voltage detection. After the detection is completed, if the data of the mutual inductor body is normal, it is placed back into the original placement box. If there are problems with the detection, the first electric push rod pulls the sliding plate to slide along the top of the cross beam, moving the clamping assembly outwards until there is enough rotation space and it will not collide with other structures, then the replacement of the two sets of clamps can be completed. The new clamp continues to clamp and detect the mutual inductor body, and the other set of clamps places the problematic mutual inductor in the collection box.

[0050] 4. The clamping plate of the present invention can be inserted along the slot of the limiting plate, facilitating the removal of the mutual inductor body. The four sets of placement boxes are arranged around the center of the bottom plate. Based on the placement positions of the placement box facing the detection device and the mutual inductor body inside, the other placement boxes and mutual inductors will also become this state after rotation, keeping the detection end of the mutual inductor always corresponding to the detection device.

[0051] 5. Compared with the prior art, four mutual inductors are stored on a set of bottom plates. After the mutual inductors are clamped by the clamping assembly, they are docked with the detection device for withstand voltage detection. At the same time, the rotating assembly rotates the bottom plate, replaces the new mutual inductor body into the detection position, and sends the faulty mutual inductor out from the sending platform, realizing efficient withstand voltage detection of multiple groups of mutual inductors, and at the same time, better screening of the faulty mutual inductors without interfering with the detection process.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A withstand voltage detection device for an instrument transformer, comprising a conveying table (1), characterized in that: A fixed plate (14) is fixed on the surface of the conveying table (1), and a turntable (15) is rotatably installed on the top of the fixed plate (14). A bottom plate (13) is installed on the top of the turntable (15). An insertion post (16) is fixed to the bottom of the bottom plate (13), and the insertion post (16) is inserted into the turntable (15). A placement box (17) is fixed to the top of the bottom plate (13), and a transformer body (111) is placed inside the placement box (17). A fixing frame (2) is fixed to the top of the conveying table (1), and a detection device (21) is fixed to the fixing frame (2). The detection device (21) is used for performing a withstand voltage test on the transformer body (111). A rotating assembly (3) is arranged outside the detection device (21). The rotating assembly (3) includes a cross beam (34). The cross beam (34) is fixed to the fixing frame (2), and a toothed ring (33) is installed at the bottom of the cross beam (34). A telescopic rod (36) is fixed to the bottom of one side of the toothed ring (33). A connecting plate (38) is fixed to the position of the bottom plate (13) corresponding to the bottom of the telescopic rod (36), and a jack is formed on the surface of the connecting plate (38). The extended end of the telescopic rod (36) can be inserted into the jack of the connecting plate (38). A clamping assembly (4) is arranged on the cross beam (34). The clamping assembly (4) includes a top plate (45). Sliding frames (46) are fixed to both ends of the bottom of the top plate (45), and a plurality of clamping plates (47) are slidably connected inside the sliding frames (46). The sliding frames (46) and the clamping plates (47) serve as clamps. A sending table (11) is arranged on one side of the conveying table (1), and a collection box (12) is placed on the surface of the sending table (11).

2. The withstand voltage detection device for an instrument transformer according to claim 1, wherein: A plurality of limiting plates (18) are symmetrically arranged inside the placement box (17). The transformer body (111) is clamped between the limiting plates (18). A spring (19) is fixed between the back of the limiting plate (18) and the inner wall of the placement box (17). A slot (110) is formed on the inner wall of the limiting plate (18), and the clamping plate (47) penetrates into the slot (110) and is in pressing contact with both sides of the transformer body (111).

3. The withstand voltage detection device for an instrument transformer according to claim 1, characterized in that: The clamping assembly (4) further includes a sliding plate (41). A sliding plate (41) is installed on one side of the cross beam (34). A second motor (43) is fixed to the sliding plate (41). A second electric push rod (44) is fixed to the bottom of the second motor (43), and the extended end of the second electric push rod (44) is fixedly connected to the top plate (45).

4. A withstand voltage detection device for an instrument transformer according to claim 3, characterized in that: A slide rail is fixed to the top of the cross beam (34). The sliding plate (41) slides along the slide rail of the cross beam (34). A first electric push rod (42) is fixed to the cross beam (34), and the extended end of the first electric push rod (42) is fixedly connected to the sliding plate (41).

5. The withstand voltage detection device for an instrument transformer according to claim 4, characterized in that: A bidirectional electric push rod (49) is fixed inside the sliding frame (46), and the two extended ends of the bidirectional electric push rod (49) are fixedly connected to a plurality of clamping plates (47).

6. The withstand voltage detection device for an instrument transformer according to claim 1, characterized in that: The rotating assembly (3) further includes a first motor (31). The first motor (31) is fixed to the back surface of the fixing frame (2). The output end of the first motor (31) is fixed with a first gear (32), and the first gear (32) is meshed with the toothed ring (33).

7. The withstand voltage detection device for an instrument transformer according to claim 6, characterized in that: A ring groove (35) is formed at the top of the toothed ring (33), and both ends of the cross beam (34) slide along the inside of the ring groove (35).

8. The withstand voltage detection device for an instrument transformer according to claim 7, characterized in that: A vertical plate (39) is fixed at the position of the cross beam (34) between the telescopic rod (36) and the top plate (45). A second gear (310) is rotatably installed on the bottom surface of the vertical plate (39). Tooth plates (311) are meshed on both sides of the second gear (310).

9. The withstand voltage detection device for an instrument transformer according to claim 8, characterized in that: The bottom of the extended end of the telescopic rod (36) is fixed with a circular ring (37). A clamping frame (312) is slidably clamped on the surface of the circular ring (37). One of the tooth plates (311) on one side of the second gear (310) is fixed to the clamping frame (312). Clamping blocks (48) are fixed on both sides of the center position of the top plate (45). A clamping groove is formed on the back surface of the tooth plate (311) on the other side of the second gear (310), and the clamping blocks (48) are inserted into the clamping groove on the back surface of the tooth plate (311).

10. A method for using a withstand voltage detection device of an instrument transformer, based on the withstand voltage detection device of an instrument transformer according to any one of claims 1-9, characterized in that, Including the following steps: Install multiple groups of fixing plates (14) on the conveying table (1), and install the bottom plate (13) and the placing box (17). The mutual inductor body (111) to be detected is placed in the placing box (17) to complete the preparation work. The clamping plate (47) is inserted into the slot (110) of the limiting plate (18). The clamping plate (47) clamps both sides of the mutual inductor body (111), and the mutual inductor body (111) is connected to the detection device (21) for withstand voltage detection. After the detection is completed, if the data of the mutual inductor body (111) is normal, it is put back into the original placing box (17). If there are problems in the detection, the clamping assembly (4) is moved outwards to complete the replacement of the two groups of clamps. The new clamps continue to clamp and detect the mutual inductor body (111), and the other group of clamps places the problematic mutual inductor body (111) inside the collection box (12).

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