Electromagnetic voltage transformer induction withstand test equipment

Abstract

The application discloses a kind of electromagnetic voltage transformer induction withstand voltage test equipment, it is related to voltage transformer withstand voltage test technical field.The application includes test table, servo motor, support frame, clamping part, test part and conveying mechanism.Electromagnetic voltage transformer is transported to the U-shaped groove positioning of support frame by feeding conveyor belt, then is rotated to the above clamping part by servo motor, is fixed by magnetic attraction sliding stud and the clamping support beam driven by two-way screw rod.Test part uses multiple rows of replaceable detection conductive plug array, can adapt to different mutual inductor terminal, realizes reliable electrical connection.Air buffer mechanism formed by sealing piston cylinder and open-close sealing sheet makes mutual inductor stable and safe in clamping and releasing process.After test is completed, mutual inductor is automatically unloaded by unloading lever and unloading conveyor belt.The equipment realizes the full-process automation operation of mutual inductor induction withstand voltage test, reduces manual intervention, improves test efficiency, safety and universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of voltage transformer withstand voltage test, in particular to an electromagnetic voltage transformer induction withstand voltage test equipment. BACKGROUND

[0002] The existing electromagnetic voltage transformer withstand voltage test mostly relies on manual operation. The usual process is that the workers manually carry the transformer to the test table, then fix the flange terminal through bolts, pressing plates or simple fixtures, and then connect the wires for withstand voltage test. Such a way has the following shortcomings: the manual carrying and positioning process is cumbersome, especially in the case of large volume and high weight of the transformer, the operation intensity is large, and the efficiency is low; the fixing method is single, usually relying on bolt holes, the adjustment process is time-consuming, and when adapting to multiple types of transformers, the fixture needs to be replaced, which has poor applicability; the unloading and transfer after the test are completely dependent on manual work, which is time-consuming and laborious, and is easy to cause damage by knocking, which seriously affects the test efficiency and safety. SUMMARY

[0003] In order to overcome the defects of the prior art, the present application provides the following technical scheme: an electromagnetic voltage transformer induction withstand voltage test equipment, comprising a test table, a servo motor is fixedly installed on the test table, a support frame is fixedly installed on the output shaft of the servo motor through a plurality of equidistant circular array arranged support frame connecting rods, a same number of U-shaped grooves as the support frame connecting rods are arranged on the circumferential edge of the support frame, and the U-shaped grooves are used to place the electromagnetic voltage transformer to be detected; two bottom push plates arranged in parallel are also fixedly installed on the test table, the two bottom push plates are arranged above the test table in an elevated manner, a support platform is slidingly installed on the two bottom push plates, and a platform plate is slidingly installed on the support platform through four vertically arranged vertical sliding rods; a three-legged table is slidingly installed on the upper surface of the platform plate, a test part is rotatably installed on each three-legged table, and the two test parts are electrically connected with the primary coil and the secondary coil of the electromagnetic voltage transformer respectively, and are used for withstand voltage test of the electromagnetic voltage transformer.

[0004] Preferably, the support platform slides on the upper surface of the bottom push plate, two top blocks are fixedly installed on each bottom push plate, the two top blocks are arranged on the two sides of the support platform, and a rubber block is arranged in contact between each top block and the edge of the support platform; wherein the four vertical sliding rods are fixedly connected with the platform plate, the four vertical sliding rods are in sliding cooperation with the support platform, and the axis of the four vertical sliding rods is arranged vertically to the upper surface of the support platform.

[0005] Preferably, the test part includes a detection conductive plug mounting body, an extrusion friction shaft is fixedly installed at the axial center of the detection conductive plug mounting body, the extrusion friction shaft is rotatably installed on the tripod table, two screw columns are fixedly installed on the tripod table, an extrusion friction plate is slidably installed on the two screw columns, the extrusion friction plate is in extrusion friction cooperation with the end face of the extrusion friction shaft, and the extrusion friction plate is used for limiting the rotation of the detection conductive plug mounting body on the tripod table, wherein the extrusion friction plate is in contact extrusion with the end face of the extrusion friction shaft through the cooperation of the nut and the screw column. A nut is threadedly sleeved on each screw column, wherein the extrusion friction plate is arranged between the nut and the tripod table, the extrusion friction plate can be extruded by rotating the nut, the friction between the extrusion friction shaft and the extrusion friction plate is increased, thereby fixing the position of the detection conductive plug, and when different detection conductive plugs are replaced and matched with the wiring terminal of the electromagnetic voltage transformer, only the friction between the extrusion friction shaft and the extrusion friction plate needs to be reduced, and then the detection conductive plug mounting body is rotated.

[0006] Preferably, a row of detection conductive plugs is fixedly installed on the circumferential surface of the detection conductive plug mounting body in the axial direction, the row of detection conductive plugs is in conductive connection with the wiring terminal of the electromagnetic voltage transformer, wherein the number of the row of detection conductive plugs is two to three, and a plurality of rows of detection conductive plugs are fixedly installed on the circumferential surface of the detection conductive plug mounting body in an equidistant circular array, the spacing and shape between the detection conductive plugs in each row are different, and the detection conductive plugs are used for adapting to the wiring terminal of different electromagnetic voltage transformers.

[0007] Preferably, the test part further includes a feeding conveying belt and a discharging conveying belt, the feeding conveying belt is arranged along the radial direction of the support frame, and the discharging conveying belt is inclined to the radial direction of the support frame, wherein a discharging lever is arranged above the discharging conveying belt, the discharging lever is arranged in parallel with the moving direction of the upper surface of the discharging conveying belt, the discharging lever is fixedly arranged above the test bench in an overhang manner, and the discharging lever is in sliding cooperation with the top end of the electromagnetic voltage transformer, and is used for pushing the electromagnetic voltage transformer to separate from the U-shaped groove of the support frame.

[0008] Preferably, the clamp part for fixing the electromagnetic voltage transformer is further included, the clamp part includes an intermediate support body fixedly installed on the platform plate, two symmetrically arranged edge support bodies are fixedly installed on the intermediate support body, the two edge support bodies are used for supporting two parallel arranged clamping support beams, the edge support bodies and the clamping support beams are in contact and sliding fit, two clamping support beams are threadedly driven and arranged on two parallel arranged bidirectional screws, the middle parts of the two bidirectional screws are fixedly installed with driven gears, the two driven gears are in meshing transmission through an intermediate driving gear, wherein the two bidirectional screws are rotatably installed on the intermediate support body, an adjusting motor is further fixedly installed on the intermediate support body, the output shaft of the adjusting motor is fixedly fitted with the intermediate driving gear; two symmetrically arranged magnetic sliding screw sliding grooves are formed on each clamping support beam, a magnetic sliding screw is slidingly installed on the inner side of each magnetic sliding screw sliding groove, the magnetic sliding screw is in magnetic attraction fit with the magnetic sliding screw sliding groove, so as to prevent the magnetic sliding screw from falling off from the magnetic sliding screw sliding groove, and the bottom end of each magnetic sliding screw and the inner wall of the magnetic sliding screw sliding groove are in rectangular block sliding mode, so as to prevent the magnetic sliding screw from rotating in the magnetic sliding screw sliding groove; a nut is threadedly arranged on each magnetic sliding screw, and the electromagnetic voltage transformer is fixed on the two clamping support beams through the nut and the magnetic sliding screw.

[0009] Preferably, two synchronous beam support sliding rods perpendicular to the upper surface of the test table are fixedly installed on one of the bottom push plates, and a synchronous beam is slidingly arranged on the two synchronous beam support sliding rods, one end of the synchronous beam towards the servo motor is fixedly installed with a sliding inclined block, and the sliding inclined block is in contact and sliding fit with the support frame connecting rod.

[0010] Preferably, a sliding sleeve is fixedly installed on the synchronous beam, an exhaust through hole is arranged at the top end of the sliding sleeve, a sliding insertion rod is slidingly inserted into the bottom end of the sliding sleeve, and the bottom end of the sliding insertion rod is in sliding fit with the upper surface of the platform plate (the bottom end of the sliding insertion rod can only slide horizontally on the upper surface of the platform plate and cannot be separated).

[0011] Preferably, a tension spring is sleeved around the outside of the intersection of the sliding sleeve and the sliding insertion rod, and the two ends of the tension spring are fixedly fitted with the sliding sleeve and the sliding insertion rod respectively; a sealing piston cylinder is fixedly installed at the middle part of the support platform, a sealing piston plate is slidingly and sealingly installed on the inner wall of the sealing piston cylinder, the sealing piston plate and the platform plate are fixedly connected through a synchronous rod, and two symmetrically arranged opening and closing sealing pieces are rotatably installed on the lower surface of the sealing piston cylinder, a gap is arranged between the two opening and closing sealing pieces for the flow of gas, a torsion spring is arranged at the rotary connection between the opening and closing sealing piece and the sealing piston cylinder, and the torsion spring is used to drive the two opening and closing sealing pieces to close on the lower surface of the sealing piston cylinder.

[0012] Preferably, two positioning blocks are fixedly installed on each of the plurality of U-shaped grooves on the support frame, and the two positioning blocks are used for positioning the lug of the electromagnetic voltage transformer.

[0013] Compared with the prior art, the present application has the following advantages: (1) The present application can automatically transfer the electromagnetic voltage transformer from the feeding conveyor to the U-shaped groove positioning position, and then rotate to the clamping position through the linkage rotation design of the support frame and the servo motor, greatly reducing the steps of manual carrying and positioning, avoiding the high-intensity operation of workers on heavy transformers, and improving the overall test efficiency and automation level of the equipment; (2) The clamping part of the present application adopts a clamping support beam structure driven by a bidirectional screw rod, and combines with the flange hole positioning design of the magnetic suction sliding stud, so that the electromagnetic voltage transformer can be quickly and stably fixed at the clamping position. Avoid the problem of relying on repeated disassembly and assembly of bolts in the traditional fixing method, not only shorten the test preparation time, but also ensure that the transformer will not loosen during high voltage test, improve the reliability and safety of the test; (3) The test part of the present application adopts an adjustable detection conductive plug mounting body, and multiple rows of conductive plugs with different spacings and shapes are designed on the circumferential surface thereof, which can be flexibly adapted to different models of electromagnetic voltage transformer terminals, reducing the problem of single specification and poor adaptability of traditional test fixtures; (4) The linkage of the feeding conveyor, the support frame, the clamping part, the discharging lever and the discharging conveyor realizes the full-process automatic feeding and discharging operation of the electromagnetic voltage transformer. Compared with the traditional manual placement and disassembly, not only a large amount of labor cost is saved, but also the possibility of falling, damage or test safety accidents of the transformer caused by improper operation during the test process is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0015] Figure 2 It is a schematic diagram of the structure of A in the present application. Figure 1

[0016] Figure 3 It is a schematic diagram of the structure of B in the present application. Figure 1

[0017] Figure 4 It is a schematic diagram of the support frame structure of the present application.

[0018] Figure 5 It is a schematic diagram of the structure of the rubber block of the present application.

[0019] Figure 6 It is a schematic diagram of the structure of the sealing piston plate of the present application.​​

[0020] Figure 7 Structure diagram of adjusting connecting rod of the application.

[0021] Figure 8 Structure diagram of extruding friction plate of the application.

[0022] Figure 9 Structure diagram of edge support of the application.

[0023] Figure 10 Structure diagram of bidirectional screw rod of the application.

[0024] In the figure: 101-test bench; 102-servo motor; 103-discharging lever; 104-discharging conveyor belt; 105-feeding conveyor belt; 106-support frame; 107-synchronous beam; 108-synchronous beam support slide rod; 109-bottom push plate; 110-sliding inclined block; 111-positioning block; 112-support frame connecting rod; 113-sliding sleeve; 114-tension spring; 115-sliding insertion rod; 116-platform plate; 117-support platform; 118-top block; 119-rubber block; 120-vertical sliding rod; 121-sealing piston plate; 122-sealing piston cylinder; 123-opening and closing sealing piece; 124-synchronous rod; 125-tripod table; 126-adjusting electric cylinder; 127-adjusting connecting rod; 128-extruding friction plate; 129-screw rod column; 130-extruding friction shaft; 131-detection conductive plug mounting body; 132-detection conductive plug; 133-intermediate support; 134-edge support; 135-clamping support beam; 136-magnetic attraction sliding stud; 137-bidirectional screw rod; 138-magnetic attraction sliding stud sliding groove; 139-driven gear; 140-intermediate drive gear; 141-adjusting motor. DETAILED DESCRIPTION

[0025] The technical solutions of the application will be further illustrated below in combination with the accompanying drawings. Figures 1-10 The technical solutions of the application will be further illustrated below in combination with the accompanying drawings.

[0026] The application provides an electromagnetic voltage transformer induction withstand voltage test equipment, which comprises a test table 101, a servo motor 102 is fixedly installed on the test table 101, a support frame 106 is fixedly installed on an output shaft of the servo motor 102 through a plurality of equidistant circular array arranged support frame connecting rods 112, a same number of U-shaped grooves as the support frame connecting rods 112 are arranged on a circumferential edge of the support frame 106, and the U-shaped grooves are used for placing an electromagnetic voltage transformer to be detected; two parallel arranged bottom push plates 109 are also fixedly installed on the test table 101, the two bottom push plates 109 are arranged in an air above the test table 101, a support platform 117 is slidingly installed on the two bottom push plates 109, and a platform plate 116 is slidingly installed on the support platform 117 through four parallel arranged vertical sliding rods 120; two symmetrically arranged tripods 125 are slidingly installed on an upper surface of the platform plate 116, a test part is rotatably installed on each tripod 125, the two test parts are electrically connected with a primary coil and a secondary coil of the electromagnetic voltage transformer respectively, and the test parts are used for performing a withstand voltage test on the electromagnetic voltage transformer.

[0027] The support platform 117 is slidingly arranged on the upper surface of the bottom push plate 109, two top blocks 118 are fixedly installed on each bottom push plate 109, the two top blocks 118 are arranged on the two sides of the support platform 117, and a rubber block 119 is arranged in contact between each top block 118 and the edge of the support platform 117; wherein the four vertical sliding rods 120 are fixedly connected with the platform plate 116, the four vertical sliding rods 120 are slidingly matched with the support platform 117, and the axis lines of the four vertical sliding rods 120 are arranged perpendicularly to the upper surface of the support platform 117.

[0028] The test part includes a detection conductive plug mounting body 131, an extrusion friction shaft 130 is fixedly installed at the axial position of the detection conductive plug mounting body 131, the extrusion friction shaft 130 is rotatably installed on the tripod table 125, two screw columns 129 are fixedly installed on the tripod table 125, an extrusion friction plate 128 is slidably and sleevedly installed through the two screw columns 129, the extrusion friction plate 128 is in extrusion friction cooperation with the end surface of the extrusion friction shaft 130, and is used for limiting the rotation of the detection conductive plug mounting body 131 on the tripod table 125. The extrusion friction plate 128 is in contact extrusion with the end surface of the extrusion friction shaft 130 through the cooperation of the nut and the screw column 129. The nut is threadedly sleeved on each screw column 129, the extrusion friction plate 128 is arranged between the nut and the tripod table 125, the extrusion friction plate 128 can be extruded by rotating the nut, so as to increase the friction force between the extrusion friction shaft 130 and the extrusion friction plate 128, thereby fixing the position of the detection conductive plug 132. When the detection conductive plug 132 of different types is matched with the wiring terminal of the electromagnetic voltage transformer, only the friction force between the extrusion friction shaft 130 and the extrusion friction plate 128 needs to be reduced, and then the detection conductive plug mounting body 131 is rotated. A plurality of detection conductive plugs 132 are fixedly installed on the circumferential surface of the detection conductive plug mounting body 131 in the axial direction, the plurality of detection conductive plugs 132 are in conductive connection with the wiring terminal of the electromagnetic voltage transformer, the number of the plurality of detection conductive plugs 132 is two to three, and a plurality of rows of detection conductive plugs 132 are fixedly installed on the circumferential surface of the detection conductive plug mounting body 131 in equidistant circular array, the spacing and shape between the detection conductive plugs 132 in each row are different, and the detection conductive plugs 132 are used for adapting to the wiring terminal of different electromagnetic voltage transformers.

[0029] Further comprising a discharging conveying belt 104 and a feeding conveying belt 105, wherein the feeding conveying belt 105 is arranged along the radial direction of the support frame 106, and the discharging conveying belt 104 is inclined to the radial direction of the support frame 106, wherein the discharging pushing rod 103 is arranged above the discharging conveying belt 104 in an inclined manner, the discharging pushing rod 103 is arranged in parallel with the moving direction of the upper surface of the discharging conveying belt 104, the discharging pushing rod 103 is fixedly arranged above the test bench 101 in an overhead manner, and the discharging pushing rod 103 is in sliding cooperation with the top end of the electromagnetic voltage transformer, and is used for pushing the electromagnetic voltage transformer to separate from the U-shaped groove of the support frame 106.

[0030] The clamping part for fixing the electromagnetic voltage transformer comprises an intermediate support body 133 fixedly installed on the platform plate 116, two symmetrically arranged edge support bodies 134 fixedly installed on the intermediate support body 133, two parallel arranged clamping support beams 135 supported by the two edge support bodies 134, the edge support bodies 134 and the clamping support beams 135 are in contact and sliding fit, two clamping support beams 135 are threadedly driven and sleeved on two parallel arranged bidirectional screws 137, the middle parts of the two bidirectional screws 137 are fixedly installed with driven gears 139, the two driven gears 139 are in meshing transmission through an intermediate driving gear 140, wherein the two bidirectional screws 137 are rotatably installed on the intermediate support body 133, the intermediate support body 133 is further fixedly installed with an adjusting motor 141, the output shaft of the adjusting motor 141 is fixedly matched with the intermediate driving gear 140; each clamping support beam 135 is provided with two symmetrically arranged magnetic suction sliding stud sliding grooves 138, the inner sides of the two magnetic suction sliding stud sliding grooves 138 are slidably installed with magnetic suction sliding studs 136, the magnetic suction sliding studs 136 are in magnetic suction fit with the magnetic suction sliding stud sliding grooves 138, for preventing the magnetic suction sliding studs 136 from falling off from the magnetic suction sliding stud sliding grooves 138, and the bottom end of each magnetic suction sliding stud 136 and the inner wall of the magnetic suction sliding stud sliding groove 138 are in rectangular block sliding mode, for preventing the magnetic suction sliding stud 136 from rotating in the magnetic suction sliding stud sliding groove 138; each magnetic suction sliding stud 136 is threadedly sleeved with a nut, and the electromagnetic voltage transformer is fixed on the two clamping support beams 135 through the nut and the magnetic suction sliding stud 136.

[0031] One of the bottom push plate 109 is fixedly installed with two vertical to the test table 101 upper surface synchronous beam support slide rod 108, and the two synchronous beam support slide rod 108 on the slide set with synchronous beam 107, synchronous beam 107 towards servo motor 102 one end is fixedly installed with sliding inclined block 110, sliding inclined block 110 and support frame connecting rod 112 contact sliding fit.Synchronous beam 107 is fixedly installed with sliding sleeve 113, sliding sleeve 113 top is provided with exhaust hole, sliding sleeve 113 bottom end is inserted with sliding plug 115, sliding plug 115 bottom end and platform plate 116 upper surface sliding fit (sliding plug 115 bottom end can only be on the platform plate 116 upper surface horizontal sliding, cannot separate).Sliding sleeve 113 and sliding plug 115 intersection outside is surrounded with tension spring 114, tension spring 114 both ends are fixedly connected with sliding sleeve 113 and sliding plug 115;Support platform 117 middle part is fixedly installed with sealed piston cylinder 122, sealed piston cylinder 122 inner wall is slidingly sealed with sealed piston plate 121, sealed piston plate 121 and platform plate 116 are fixedly connected through synchronous rod 124, sealed piston cylinder 122 lower surface is rotatably installed with two symmetrical opening and closing sealing sheet 123, two opening and closing sealing sheet 123 are provided with a slit, for the flow of gas, wherein opening and closing sealing sheet 123 and sealed piston cylinder 122 rotatable connection is provided with torsion spring, the torsion spring is used to drive two opening and closing sealing sheet 123 to close on the lower surface of sealed piston cylinder 122.Support frame 106 on the plurality of U-shaped groove is fixedly installed with two positioning blocks 111, two positioning blocks 111 are used for positioning the ear of the electromagnetic voltage transformer;Platform plate 116 is fixedly installed with adjusting cylinder 126, the adjusting cylinder 126 telescopic rod end and two tripod table 125 are movably connected through two adjusting connecting rods 127, for controlling the distance between two tripod table 125.

[0032] The working principle of the electromagnetic voltage transformer induction withstand voltage test equipment disclosed in the application is as follows: the electromagnetic voltage transformer to be tested is placed on the feeding conveyor belt 105, the electromagnetic voltage transformer is conveyed to the U-shaped groove of the support frame 106 through the feeding conveyor belt 105 (when placing, the line between the ear of the electromagnetic voltage transformer and the two positioning blocks 111 should be as parallel as possible), so that the ear of the electromagnetic voltage transformer is in contact with the two positioning blocks 111, and positioning is realized. Then the servo motor 102 is started, the output shaft of the servo motor 102 drives the support frame 106 and the electromagnetic voltage transformer on the support frame 106 to rotate together, and the electromagnetic voltage transformer is rotated to above the clamping part, and the bottom of the electromagnetic voltage transformer is fixed by the clamping part.

[0033] According to the shape of the bottom mounting flange of different electromagnetic voltage transformers, the position of the magnetic sliding stud 136 is adjusted to be aligned with the flange hole. Specifically, the adjusting motor 141 is controlled to drive the output shaft of the adjusting motor 141 to rotate the intermediate drive gear 140, the intermediate drive gear 140 drives the two driven gears 139 to rotate, the two driven gears 139 drive the two bidirectional lead screws 137 to rotate, and the bidirectional lead screws 137 rotate to drive the two clamping support beams 135 to move relative to each other. Then manually push the two magnetic sliding studs 136 to slide in the magnetic sliding stud sliding groove 138, adjust the distance and position of the two magnetic sliding studs 136 on the clamping support beam 135, and determine the position of the magnetic sliding stud 136 in the magnetic sliding stud sliding groove 138 will not change due to the magnetic force.

[0034] Each support frame connecting rod 112 is arranged in alignment with the U-shaped groove of the support frame 106, that is, synchronous movement. Before the electromagnetic voltage transformer moves above the clamping part, the support frame connecting rod 112 will contact the sliding inclined block 110, and then relatively slide with the inclined surface of the sliding inclined block 110, thereby pushing the sliding inclined block 110 to move upward, the sliding inclined block 110 drives the synchronous cross beam 107 to move synchronously, the synchronous cross beam 107 drives the sliding sleeve 113 to move synchronously, the sliding sleeve 113 drives the sliding plug rod 115 to move synchronously through the tension spring 114, the sliding plug rod 115 drives the platform plate 116 to move synchronously, and the platform plate 116 drives the sealing piston plate 121 on the synchronous rod 124 to slide in the sealing piston cylinder 122. At this time, the sealing piston plate 121 slides upward in the sealing piston cylinder 122, which will cause the external air to flow into the sealing piston cylinder 122, and the air only enters through the gap between the two opening and closing sealing sheets 123, so the speed of air flow will be reduced. Therefore, when the electromagnetic voltage transformer is completely moved above the clamping part, the movement of the sliding inclined block 110, the synchronous cross beam 107 and the sliding sleeve 113 ends, but the sliding plug rod 115 will be pulled by the platform plate 116, the platform plate 116 will be pulled by the sliding resistance of the sealing piston plate 121 in the sealing piston cylinder 122, causing the sliding sleeve 113 and the sliding plug rod 115 to relatively slide, and the tension spring 114 is stretched and deformed. Under the tension of the tension spring 114, the platform plate 116 continues to slowly move upward, and the sealing piston plate 121 slowly slides in the sealing piston cylinder 122. During this process, the magnetic sliding stud 136 will be inserted into the flange hole of the electromagnetic voltage transformer, and then stop moving. Then manually tighten the nut on the corresponding magnetic sliding stud 136 to fix the electromagnetic voltage transformer on the clamping part.

[0035] The telescopic rod of the adjusting cylinder 126 is controlled to drive the two adjusting connecting rods 127 to drive the two tripod tables 125 to move towards the electromagnetic voltage transformer, so that the detection conductive plug 132 is in contact with the terminal of the electromagnetic voltage transformer (according to different terminals, the end of the detection conductive plug 132 needs to be fixed with the terminal, that is, the screw is tightened). Through the two groups of detection conductive plugs 132 (corresponding to the primary coil and the secondary coil), the primary coil and the secondary coil are powered and voltage is applied. For example: the voltage is applied to the secondary coil, and the primary coil is open circuit or short circuit test. The test voltage gradually rises to the specified value (for example, 150V, 150Hz on the secondary side, so that 35kV level high voltage is induced on the primary side), and lasts for 40 seconds. Finally, the resistance of the primary coil and the secondary coil is measured, and the change of the resistance before and after is judged to see if the insulating layer is damaged.

[0036] Finally, the magnetic sliding stud 136 and the nut on the terminal are loosened, the telescopic rod of the adjusting cylinder 126 is controlled to retract, the detection conductive plug 132 is separated from the terminal, and then the servo motor 102 is started again. At this time, the lower surface edge of the sliding inclined block 110 overlaps the upper surface edge of the supporting frame connecting rod 112, and the rotation of the supporting frame 106 driven by the servo motor 102 will cause the electromagnetic voltage transformer to tilt (at the same time, the rubber block 119 may be compressed, and the relative sliding between the supporting platform 117 and the bottom push plate 109 occurs, depending on the cooperation tightness of the magnetic sliding stud 136 and the flange hole of the electromagnetic voltage transformer). Then the sliding inclined block 110 will fall from the supporting frame connecting rod 112. During this process, the magnetic sliding stud 136 will be separated from the flange hole of the electromagnetic voltage transformer (since the sealing piston plate 121 moves downward in the sealing piston cylinder 122, at this time the air is pushed outward, the two opening and closing sealing pieces 123 are opened, causing the movement resistance of the platform plate 116 to be greatly reduced, so the magnetic sliding stud 136 will quickly separate from the electromagnetic voltage transformer). Then move the electromagnetic voltage transformer to the position where it contacts the discharging lever 103, so that the electromagnetic voltage transformer moves to the discharging conveyor belt 104, and is conveyed to the next designated position through the discharging conveyor belt 104.

Claims

1. An electromagnetic voltage transformer inductive withstand voltage test device, comprising a test bench (101), characterized in that: A servo motor (102) is fixedly installed on the test bench (101). A support frame (106) is fixedly installed on the output shaft of the servo motor (102) through a plurality of support frame connecting rods (112) arranged in a equidistant circular array. The circumferential edge of the support frame (106) is provided with the same number of U-shaped grooves as the support frame connecting rods (112). The U-shaped grooves are used to place the electromagnetic voltage transformer to be tested. Two parallel bottom push plates (109) are also fixedly installed on the test bench (101). The two bottom push plates (109) are suspended above the test bench (101). A support platform (117) is slidably installed on the two bottom push plates (109). A platform plate (116) is slidably installed on the support platform (117) through four parallel vertical sliding rods (120). Two symmetrically arranged tripods (125) are slidably mounted on the upper surface of the platform plate (116). Each tripod (125) is rotatably mounted with a test section. The two test sections are electrically connected to the primary coil and secondary coil of the electromagnetic voltage transformer, respectively, for conducting withstand voltage tests on the electromagnetic voltage transformer.

2. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 1, characterized in that: The support platform (117) slides on the upper surface of the bottom push plate (109), and two top blocks (118) are fixedly installed on each bottom push plate (109). The two top blocks (118) are set on both sides of the support platform (117), and a rubber block (119) is provided between each top block (118) and the edge of the support platform (117). Four vertical sliding rods (120) are fixedly connected to the platform plate (116), and the four vertical sliding rods (120) slide with the support platform (117). The axes of the four vertical sliding rods (120) are set perpendicular to the upper surface of the support platform (117).

3. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 2, characterized in that: The testing unit includes a test conductive plug mounting body (131), a compression friction shaft (130) is fixedly mounted at the axial position of the test conductive plug mounting body (131), the compression friction shaft (130) is rotatably mounted on a tripod (125), and two screw posts (129) are fixedly mounted on the tripod (125). A compression friction plate (128) is slidably mounted on the two screw posts (129). The compression friction plate (128) and the end face of the compression friction shaft (130) are in compression friction engagement to limit the rotation of the test conductive plug mounting body (131) on the tripod (125). The compression friction plate (128) achieves contact compression with the end face of the compression friction shaft (130) through the engagement of the nut and the screw post (129).

4. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 3, characterized in that: A row of conductive plugs (132) is fixedly installed on the axial direction of the circumferential surface of the conductive plug mounting body (131). The row of conductive plugs (132) is conductively connected to the wiring terminals of the electromagnetic voltage transformer. The number of conductive plugs (132) in one row is two to three. Multiple rows of conductive plugs (132) are fixedly installed in an equidistant circular array on the circumferential surface of the conductive plug mounting body (131). The spacing and shape between each row of conductive plugs (132) are different, which are used to adapt to the wiring terminals of different electromagnetic voltage transformers.

5. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 4, characterized in that: It also includes a feeding conveyor belt (104) and a feeding conveyor belt (105), wherein the feeding conveyor belt (105) is arranged radially along the support frame (106), and the feeding conveyor belt (104) is inclined to the radial direction of the support frame (106). A feeding lever (103) is arranged diagonally above the feeding conveyor belt (104). The feeding lever (103) is arranged parallel to the moving direction of the upper surface of the feeding conveyor belt (104). The feeding lever (103) is suspended and fixed above the test bench (101), and the feeding lever (103) is in contact with the top of the electromagnetic voltage transformer and slides to push the electromagnetic voltage transformer to separate from the U-shaped groove of the support frame (106).

6. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 5, characterized in that: It also includes a clamping part for fixing the electromagnetic voltage transformer. The clamping part includes an intermediate support (133) fixedly installed on the platform plate (116). Two symmetrically arranged edge supports (134) are fixedly installed on the intermediate support (133). The two edge supports (134) are used to support two parallel clamping support beams (135). The edge supports (134) and the clamping support beams (135) are in contact and sliding fit. The two clamping support beams (135) are threadedly driven on two parallel bidirectional screws (137). A driven gear (139) is fixedly installed in the middle of each of the two bidirectional screws (137). The two driven gears (139) are meshed and driven by an intermediate drive gear (140). The two bidirectional screws (137) are rotatably installed on the intermediate support (133). An adjusting motor (141) is also fixedly installed on the intermediate support (133). The output shaft of the adjusting motor (141) is fixedly fitted with the intermediate drive gear (140). Each clamping support beam (135) has two symmetrically arranged magnetic sliding stud sliding grooves (138). Magnetic sliding studs (136) are slidably installed on the inner side of each magnetic sliding stud sliding groove (138). The magnetic sliding studs (136) and the magnetic sliding stud sliding grooves (138) are magnetically attracted to each other to prevent the magnetic sliding studs (136) from falling out of the magnetic sliding stud sliding grooves (138). Furthermore, the bottom end of each magnetic sliding stud (136) slides in a rectangular block manner with the inner wall of the magnetic sliding stud sliding groove (138) to prevent the magnetic sliding studs (136) from rotating within the magnetic sliding stud sliding groove (138). Each magnetic sliding stud (136) is threaded with a nut.

7. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 6, characterized in that: Two synchronous beam support slides (108) perpendicular to the upper surface of the test bench (101) are fixedly installed on one of the bottom push plates (109), and synchronous beams (107) are slidably sleeved on the two synchronous beam support slides (108). A sliding block (110) is fixedly installed at one end of the synchronous beam (107) facing the servo motor (102), and the sliding block (110) is in contact with the support frame connecting rod (112) for sliding engagement.

8. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 7, characterized in that: A sliding sleeve (113) is fixedly installed on the synchronous crossbeam (107). The top end of the sliding sleeve (113) is provided with an exhaust hole. A sliding rod (115) is slidably inserted into the bottom end of the sliding sleeve (113). The bottom end of the sliding rod (115) is slidably engaged with the upper surface of the platform plate (116).

9. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 8, characterized in that: A tension spring (114) is sleeved around the outside of the intersection of the sliding sleeve (113) and the sliding rod (115). The two ends of the tension spring (114) are fixedly engaged with the sliding sleeve (113) and the sliding rod (115) respectively. A sealing piston cylinder (122) is fixedly installed in the middle of the support platform (117). A sealing piston plate (121) is slidably sealed on the inner wall of the sealing piston cylinder (122). The sealing piston plate (121) is fixedly connected to the platform plate (116) through a synchronizing rod (124). Two symmetrically arranged opening and closing sealing plates (123) are rotatably installed on the lower surface of the sealing piston cylinder (122). A gap is provided between the two opening and closing sealing plates (123) for gas flow. A torsion spring is provided at the rotatable connection between the opening and closing sealing plates (123) and the sealing piston cylinder (122). The torsion spring is used to drive the two opening and closing sealing plates (123) to close on the lower surface of the sealing piston cylinder (122).

10. The electromagnetic voltage transformer inductive withstand voltage test equipment according to claim 9, characterized in that: Two positioning blocks (111) are fixedly installed on each of the multiple U-shaped grooves on the support frame (106). The two positioning blocks (111) are used to position the lugs of the electromagnetic voltage transformer. An adjusting electric cylinder (126) is fixedly installed on the platform plate (116). The end of the telescopic rod of the adjusting electric cylinder (126) is movably connected to the two tripod platforms (125) through two adjusting connecting rods (127) to control the distance between the two tripod platforms (125).

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