A transformer power frequency withstand voltage test device

Abstract

The invention relates to the technical field of withstand voltage testing, and specifically to a transformer power frequency withstand voltage testing device, comprising an electric control box, a bottom plate, a support plate frame, a supporting assembly, a locking wire assembly and a cleaning assembly. The transformer power frequency withstand voltage testing device can stably support the transformer, first drive the transformer to move upward and perform comprehensive cleaning on its surface through the cleaning assembly, and at the same time can collect dust and dirt in a centralized manner to avoid contaminating a test work surface, and then drive the transformer to move downward after cleaning. At the same time, a locking wire assembly that can be used in conjunction can ensure that the high-voltage lead and the transformer winding terminal are in firm contact, which can not only eliminate the factors that cause breakdown or flashover of the transformer due to dirt attachment, but also avoid fluctuations in test data, thereby improving the accuracy of the results of the entire test device and facilitating operators to judge the performance of the transformer.

Description

Technical Field

[0001] The invention relates to the technical field of withstand voltage testing, in particular to a transformer power frequency withstand voltage testing device. Background Art

[0002] A transformer is an electrical device used to change AC voltage. It uses the principle of electromagnetic induction to input a certain AC voltage into one set of windings, and then outputs AC of a different voltage into another set of windings. In order to ensure that the insulation performance of the transformer meets the standard requirements, it needs to be subjected to a withstand voltage test before it is put into use.

[0003] During the storage of the transformer, a small amount of dust and dirt will adhere to its surface, and the existing transformer power frequency test device usually lacks a cleaning structure, which causes the transformer to be prone to breakdown or flickering during the test, resulting in the test being unable to proceed smoothly. At the same time, during the test, the high-voltage lead and the winding of the transformer are prone to fall off due to various reasons, causing the test data to fluctuate and deviate from the actual value, thereby reducing the accuracy of the entire test result and seriously affecting the judgment of the various performance of the test transformer. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a transformer power frequency withstand voltage test device, which can stably support the transformer, then first drive it to move upward and thoroughly clean its surface through a cleaning component, while being able to collect dust and dirt in a centralized manner to prevent them from contaminating the test work surface, and then drive the transformer downward after the cleaning is completed. At the same time, a locking wire component that can be used in conjunction can ensure that the high-voltage lead and the transformer winding terminal are in firm contact, which can not only eliminate the factors that cause transformer breakdown or flashover and other faults due to dirt adhesion, but also avoid fluctuations in test data, thereby improving the accuracy of the results of the entire test device, and also facilitating operators to judge the performance of the transformer.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a transformer power frequency withstand voltage test device, including an electric control box for outputting test results, a bottom plate is arranged on the side of the electric control box, a support plate frame is symmetrically installed on the upper end of the bottom plate, a support assembly is arranged on the bottom plate inside the support plate frame, and strip-shaped through grooves are symmetrically opened on the opposite side walls of the support plate frame, a locking wire assembly is rotatably arranged in the strip-shaped through groove, the locking wire assembly and the electric control box are connected by electrical signals, and a cleaning assembly is fixedly connected to the upper end of the support plate frame;

[0006] The wire locking assembly includes a rotating shaft, a rotating shaft is fixedly installed in the middle of the strip-shaped through groove, a wire locking plate is rotatably installed in the middle of the rotating shaft, a rectangular groove is opened at the upper end of the wire locking plate, a wire locking tongue is slidably arranged inside the rectangular groove, a through hole is opened in the middle of the wire locking tongue, a pre-tightening spring is installed between the side walls of the rectangular groove and the wire locking tongue, side plates are symmetrically installed on the opposite side walls of the support plate frame, a wire shaft is fixedly installed between the side walls opposite to the side plates, a wire wheel is fixedly installed in the middle of the wire shaft, a wire pressing roller is arranged above the wire wheel, and the end of the wire pressing roller is rotatably connected to the side plate, a high-voltage lead is passed through the through hole on the wire locking tongue, and the high-voltage lead passes from above the wire wheel and below the wire pressing roller and is connected with the inside of the electric control box.

[0007] Preferably, a vertical plate is fixedly provided on the upper surface of the bottom plate and at the bottom of the strip-shaped through groove, a pressure switch is provided on the opposite side of the vertical plate, and an indicator light is provided on the back side of the vertical plate, and the indicator light is connected to the pressure switch through a wire.

[0008] Preferably, the supporting assembly includes a lifting unit, which is arranged on the bottom plate inside the support frame, and a supporting box is fixedly connected to the upper end of the lifting unit. The side wall of the supporting box facing away from the electric control box is open and a dust collecting frame is slidably arranged inside the supporting box. A sealing plate is fixedly arranged on the side of the dust collecting frame away from the electric control box, and the sealing plate and the supporting box are connected by magnetic attraction. Dust leakage holes are arranged in a matrix on the upper end surface of the supporting box, and a limiting base seat matching the transformer is fixedly installed in the middle of the upper end surface of the supporting box.

[0009] Preferably, the lifting unit includes a first electric push rod, which is fixedly arranged in the middle of the upper end surface of the base plate, and the upper end of the first electric push rod is fixedly connected to the lower end of the support box. The base plate on both sides of the first electric push rod is symmetrically provided with strip slide grooves, and slide rods are symmetrically installed in the strip slide grooves. An L-shaped plate is sleeved on the slide rod, and a buffer spring is installed between the L-shaped plate and the side wall of the strip slide groove. A pull rod is hinged on the upper end of the L-shaped plate, and the upper end of the pull rod is hinged on the lower end surface of the support box.

[0010] Preferably, a circular frame is fixedly installed on the upper end surface of the support box and located outside the dust leakage hole, and semi-cylindrical protrusions are evenly arranged on the inner wall of the circular frame from top to bottom.

[0011] Preferably, the semi-cylindrical convex column is a hollow structure and its arc-shaped surface is a porous structure design, and an electrostatic generator is installed on the inner side wall of the semi-cylindrical convex column.

[0012] Preferably, a handle is fixedly mounted on the side wall of the sealing plate away from the dust collecting frame.

[0013] Preferably, a linkage plate is fixedly connected to the lower end of the wire locking plate.

[0014] Preferably, the cleaning assembly includes a second electric push rod, which is symmetrically installed on the upper end of the support plate frame, and the upper end of the second electric push rod located on the same side is fixedly connected to a strip plate, and an extension plate is fixedly provided on the opposite side of the strip plate near the end head, and the lower end of the extension plate is fixedly connected to a vertical rod, and a rubber plate is fixedly provided on the lower end of the side wall opposite to the vertical rod, and flexible cleaning strips are evenly provided on the side walls opposite to the rubber plate.

[0015] Preferably, the distance between the two opposite rubber plates is smaller than the side length of the circular frame.

[0016] Beneficial effects of the present invention:

[0017] 1. The support assembly can stably support the transformer to ensure its stability during the test. The lifting unit can drive the transformer to move upward and clean its surface through the cleaning assembly. Dust and dirt are collected and processed to avoid contamination of the test work surface. The factors that cause transformer breakdown or flashover caused by dirt adhesion during the test are eliminated.

[0018] 2. After the transformer is cleaned, the lifting unit can also drive it to move downward. With the cooperation of the wire locking assembly, the high-voltage lead and the transformer winding terminal can be firmly in contact. At the same time, the wire locking assembly can trigger the pressure switch to light up the indicator light, so that the operator can quickly know the wiring status. In this way, it can avoid fluctuations in the data displayed on the electric control box during the test, thereby improving the accuracy of the results of the entire test device, and it is also beneficial for the operator to judge the performance of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 The present invention Figure 1 Schematic diagram of the three-dimensional structure after removing the electric control box;

[0022] Figure 3 The present invention Figure 2 Schematic diagram of the three-dimensional structure after removing the cleaning components;

[0023] Figure 4 The present invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0024] Figure 5 It is a schematic diagram of the three-dimensional connection structure after removing the lifting unit from the support assembly of the present invention;

[0025] Figure 6The present invention Figure 5 Schematic diagram of the internal three-dimensional connection structure;

[0026] Figure 7 It is a schematic diagram of the structure of the semi-cylindrical convex column in the present invention;

[0027] Figure 8 The present invention Figure 3 A schematic diagram of the enlarged structure at B;

[0028] Fig. 9 It is a schematic diagram of the three-dimensional connection structure between the support frame and the wire locking assembly in the present invention;

[0029] Fig.10 It is a three-dimensional structural schematic diagram of the cleaning component in the present invention;

[0030] Fig.11 The present invention Fig. 9 Enlarged structural diagram at C.

[0031] In the figure:

[0032] 1. Electric control box; 2. Bottom plate; 21. Vertical plate; 22. Pressure switch; 23. Indicator light; 3. Support plate rack;

[0033] 4. Support assembly; 41. Lifting unit; 411. First electric push rod; 412. Strip slide; 413. Slide rod; 414. L-shaped plate; 415. Pull rod; 416. Buffer spring;

[0034] 42. Support box; 421. Round frame; 422. Semi-cylindrical convex column; 4221. Electrostatic generator; 43. Dust collecting frame; 44. Closing plate; 441. Handle; 45. Dust leakage hole; 46. Position limiting base seat;

[0035] 5. Wire locking assembly; 51. Rotating shaft; 52. Wire locking plate; 521. Linkage plate; 53. Wire locking tongue; 54. Preload spring; 55. Side plate; 56. Wire spool; 57. Wire wheel; 58. Wire pressing roller; 59. High voltage lead wire;

[0036] 6. Cleaning assembly; 61. Second electric push rod; 62. Strip plate; 63. Extension plate; 64. Vertical rod; 65. Rubber plate; 66. Flexible cleaning strip. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0038] Embodiment 1:

[0039] See also Figures 1 to 11A transformer power frequency withstand voltage test device includes an electric control box 1 for outputting test results, a bottom plate 2 is arranged on the side of the electric control box 1, a support frame 3 is symmetrically installed on the upper end of the bottom plate 2, a support assembly 4 is arranged on the bottom plate 2 inside the support frame 3, and strip-shaped through grooves are symmetrically opened on the opposite side walls of the support frame 3, a locking wire assembly 5 is rotatably arranged in the strip-shaped through groove, and the locking wire assembly 5 and the electric control box 1 are connected by electrical signals.

[0040] A vertical plate 21 is fixedly arranged on the upper end surface of the bottom plate 2 and at the bottom of the strip-shaped through groove, a pressure switch 22 is arranged on the opposite side of the vertical plate 21, and an indicator light 23 is arranged on the opposite side of the vertical plate 21. The indicator light 23 is connected to the pressure switch 22 through a wire.

[0041] The support assembly 4 includes a lifting unit 41, and the lifting unit 41 is arranged on the bottom plate 2 on the inner side of the support frame 3. The upper end of the lifting unit 41 is fixedly connected to a support box 42. The side wall of the support box 42 facing away from the electric control box 1 is open and a dust collecting frame 43 is slidably arranged inside. A sealing plate 44 is fixedly arranged on the side of the dust collecting frame 43 away from the electric control box 1. The sealing plate 44 and the support box 42 are connected by magnetic attraction. The upper end surface of the support box 42 is arranged with dust leakage holes 45 in a matrix arrangement, and a limiting base seat 46 matching the transformer is fixedly installed in the middle of the upper end surface of the support box 42.

[0042] The lifting unit 41 includes a first electric push rod 411, which is fixedly arranged in the middle of the upper end surface of the base plate 2, and the upper end of the first electric push rod 411 is fixedly connected to the lower end of the support box 42. The base plate 2 on both sides of the first electric push rod 411 is symmetrically provided with strip slide grooves 412, and slide rods 413 are symmetrically installed in the strip slide grooves 412. An L-shaped plate 414 is sleeved on the slide rod 413, and a buffer spring 416 is installed between the L-shaped plate 414 and the side wall of the strip slide groove 412. A pull rod 415 is hinged at the upper end of the L-shaped plate 414, and the upper end of the pull rod 415 is hinged on the lower end surface of the support box 42.

[0043] A circular frame 421 is fixedly installed on the upper end surface of the support box 42 and located outside the dust leakage hole 45. Semi-cylindrical protrusions 422 are evenly arranged on the inner side wall of the circular frame 421 from top to bottom.

[0044] The semi-cylindrical convex column 422 is a hollow structure and its arc surface is a porous structure design, and an electrostatic generator 4221 is installed on the inner side wall of the semi-cylindrical convex column 422.

[0045] A handle 441 is fixedly mounted on the side wall of the sealing plate 44 away from the dust collecting frame 43 .

[0046] The wire locking assembly 5 comprises a rotating shaft 51, a rotating shaft 51 is fixedly installed in the middle of the strip-shaped through groove, a wire locking plate 52 is rotatably installed in the middle of the rotating shaft 51, a linkage plate 521 is fixedly connected to the lower end of the wire locking plate 52, a rectangular groove is provided at the upper end of the wire locking plate 52, a wire locking tongue 53 is slidably provided inside the rectangular groove, a through hole is provided in the middle of the wire locking tongue 53, a preload spring 54 is installed between the side wall of the rectangular groove and the wire locking tongue 53, side plates 55 are symmetrically installed on the opposite side walls of the support frame 3, a wire spool 56 is fixedly installed between the opposite side walls of the side plates 55, a wire wheel 57 is fixedly installed in the middle of the wire spool 56, a wire pressing roller 58 is provided above the wire wheel 57, and the end of the wire pressing roller 58 is rotatably connected to the side plate 55, a high-voltage lead 59 is passed through the through hole on the wire locking tongue 53, the high-voltage lead 59 passes from above the wire wheel 57 and below the wire pressing roller 58 and is connected with the inside of the electric control box 1.

[0047] In this embodiment, a flexible layer is disposed on the outer side of the crimping roller 58 .

[0048] During the specific operation, the transformer that needs to be tested for power frequency withstand voltage is hoisted to the upper end of the support box 42 through the existing hoisting equipment. The limit base seat 46 can cooperate with the bottom of the transformer to place it stably. Then the first electric push rod 411 is started, and the support box 42 and the transformer on its upper end are driven downward by the first electric push rod 411. Under the action of the pull rod 415, the L-shaped plates 414 on the left and right sides will move away from each other. At this time, the buffer spring 416 is compressed, and the L-shaped plate 414 will squeeze the linkage plate 521 and drive the lower end of the locking plate 52 to rotate around the rotating shaft 51 toward the pressure switch 22, and at the same time, the lock The upper end of the wire plate 52 will drive the locking tongue 53 and the high-voltage lead 59 to rotate toward the transformer. Finally, the locking tongue 53 will drive the pin of the high-voltage lead 59 to cover the transformer winding terminal. At this time, the reaction force of the preload spring 54 can always ensure that the pin of the high-voltage lead 59 is firmly in contact with the transformer winding terminal, thereby improving the stability of the contact. The linkage plate 521 will abut against the pressure switch 22 and turn on the indicator light 23. The operator can judge whether the pin of the high-voltage lead 59 is in good contact with the transformer winding terminal by observing the state of the indicator light 23, thereby improving the convenience of use.

[0049] When the high-voltage lead 59 is pulled by the wire locking tongue 53, the wire wheel 57 can guide it to a certain extent, thereby preventing it from getting entangled. At the same time, the flexible layer on the outside of the wire pressing roller 58 can clean the outer surface of the high-voltage lead 59 to ensure its neatness.

[0050] Embodiment 2:

[0051] The technical solution is basically the same as that of the first embodiment, see Figure 1 , Figure 2 by Fig.10The difference is that: the upper end of the support plate frame 3 is fixedly connected to a cleaning component 6, and the cleaning component 6 includes a second electric push rod 61. The second electric push rod 61 is symmetrically installed on the upper end of the support plate frame 3, and the upper end of the second electric push rod 61 located on the same side is fixedly connected to a strip plate 62, and an extension plate 63 is fixedly provided on the opposite side of the strip plate 62 near the end, and the lower end of the extension plate 63 is fixedly connected to a vertical rod 64, and a rubber plate 65 is fixedly provided on the lower end of the side wall opposite to the vertical rod 64, and flexible cleaning strips 66 are evenly provided on the side walls opposite to the rubber plate 65, and the distance between the two opposite rubber plates 65 is less than the side length of the circular frame 421.

[0052] During specific operation, after the transformer that needs to undergo power frequency withstand voltage test is hoisted to the upper end of the support box 42 and placed stably, the first electric push rod 411 is started, and the support box 42 and the transformer on its upper end are driven to move upward first through the first electric push rod 411, so that the upper end of the transformer is close to the rubber plate 65, and then the second electric push rod 61 is started, and the strip plate 62, the extension plate 63, the vertical rod 64 and the rubber plate 65 are driven to reciprocate up and down through the second electric push rod 61. Since the distance between the two relative rubber plates 65 is less than the side length of the circular frame 421, the rubber plate 65 will be squeezed by the semi-cylindrical protrusion 422 during the downward movement of the rubber plate 65 and deformed, and the deformation force will drive the rubber plate 65 and the flexible cleaning strip 66 to approach the side wall of the transformer, and then the flexible cleaning strip 66 will move back and forth. The strip 66 can clean the side wall of the transformer. During the cleaning process, the large pieces of dirt swept down will fall down and enter the dust collecting frame 43 through the dust leakage hole 45, and the swept dust will float near the flexible cleaning strip 66. During the upward movement of the rubber plate 65 and the flexible cleaning strip 66, the rubber plate 65 will shrink and reset, and at the same time, it will generate vibration and transmit it to the flexible cleaning strip 66. At this time, the attached dust on the surface of the flexible cleaning strip 66 will also be shaken off, and then the electrostatic generator 4221 set inside the semi-cylindrical boss 422 will generate an electrostatic magnetic field and collect the floating dust particles into the semi-cylindrical boss 422. After using it for a period of time, the dust collecting frame 43 is taken out by manually pulling the handle 441 outward, and then the dirt inside it is cleaned and reset before continuing to use it;

[0053] After the transformer surface is cleaned, the cleaning assembly 6 is reset, and the first electric push rod 411 drives the support box 42 and the transformer on its upper end to move downward, and then a power frequency withstand voltage test is performed.

[0054] The working principle of the present invention when in use:

[0055] 1. The transformer to be tested for power frequency withstand voltage is hoisted to the upper end of the support box 42 by the existing hoisting equipment. The limit base 46 can cooperate with the bottom of the transformer to place it stably. The first electric push rod 411 is started. The support box 42 and the transformer on its upper end are driven to move upward first by the first electric push rod 411, so that the upper end of the transformer is close to the rubber plate 65. Then the second electric push rod 61 is started. The strip plate 62, the extension plate 63, the vertical rod 64 and the rubber plate 65 are driven to reciprocate up and down by the second electric push rod 61. Since the distance between the two relative rubber plates 65 is less than the side length of the circular frame 421, the rubber plate 65 will be squeezed by the semi-cylindrical protrusion 422 during the downward movement. The deformation will drive the rubber plate 65 and the flexible cleaning strip 66 to approach the side wall of the transformer, and then the flexible cleaning strip 66 can clean the side wall of the transformer. During the cleaning process, the large pieces of dirt swept down will fall down and enter the dust collecting frame 43 through the dust leakage hole 45, and the swept dust will float near the flexible cleaning strip 66. During the upward movement of the rubber plate 65 and the flexible cleaning strip 66, the rubber plate 65 will shrink and reset, and at the same time, it will generate vibration and transmit it to the flexible cleaning strip 66. At this time, the dust attached to the surface of the flexible cleaning strip 66 will also be shaken off, and then the electrostatic generator 4221 set inside the semi-cylindrical boss 422 will generate an electrostatic magnetic field and collect the floating dust particles into the semi-cylindrical boss 422.

[0056] Second: When the surface of the transformer is cleaned, the cleaning assembly 6 is reset, and the first electric push rod 411 drives the support box 42 and the transformer at its upper end to move downward. Under the action of the pull rod 415, the L-shaped plates 414 on the left and right sides will move away from each other. At this time, the buffer spring 416 is compressed, and the L-shaped plate 414 will squeeze the linkage plate 521 and drive the lower end of the locking plate 52 to rotate around the rotating shaft 51 toward the pressure switch 22. At the same time, the upper end of the locking plate 52 will drive the locking tongue 53 and the high-voltage lead 59 to rotate toward the transformer. Finally, the locking tongue 53 will drive the pin of the high-voltage lead 59 to cover the transformer winding terminal. At this time, the reaction force of the preload spring 54 can always ensure that the pin of the high-voltage lead 59 is firmly in contact with the transformer winding terminal, thereby improving the stability of the contact. The linkage plate 521 will abut against the pressure switch 22 and light up the indicator light 23. The operator can judge whether the pin of the high-voltage lead 59 is in good contact with the transformer winding terminal by observing the state of the indicator light 23, thereby improving the convenience of use.

[0057] 3. When the high-voltage lead wire 59 is pulled by the wire locking tongue 53, the wire wheel 57 can guide it to a certain extent, thereby preventing it from getting tangled. At the same time, the flexible layer on the outer side of the wire pressing roller 58 can clean the outer surface of the high-voltage lead wire 59 to ensure its neatness.

[0058] Fourth: The operator controls the electric control box 1 and applies a certain value of high voltage current to the transformer for a period of time to observe whether the transformer can withstand the voltage without insulation failure such as breakdown or flashover, so as to judge the insulation performance of the transformer.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A transformer power frequency withstand voltage test device, comprising an electric control box (1) for outputting test results, characterized in that: The electric control box (1) is provided with a bottom plate (2) on the side, a support plate frame (3) is symmetrically installed on the upper end of the bottom plate (2), a support assembly (4) is provided on the bottom plate (2) inside the support plate frame (3), and strip-shaped through grooves are symmetrically opened on the opposite side walls of the support plate frame (3), a locking wire assembly (5) is rotatably arranged in the strip-shaped through groove, the locking wire assembly (5) and the electric control box (1) are connected by means of electrical signals, and a cleaning assembly (6) is fixedly connected to the upper end of the support plate frame (3); The locking wire assembly (5) comprises A rotating shaft (51) is fixedly mounted in the middle of the strip-shaped through groove; A thread locking plate (52), the thread locking plate (52) is rotatably mounted on the middle part of the rotating shaft (51); A thread locking tongue (53), wherein a rectangular groove is provided at the upper end of the thread locking plate (52), a thread locking tongue (53) is slidably arranged inside the rectangular groove, and a through hole is provided in the middle of the thread locking tongue (53); A preload spring (54), wherein a preload spring (54) is installed between the side wall of the rectangular groove and the thread locking tongue (53); Side plates (55), the side plates (55) are symmetrically mounted on the side walls opposite to the support frame (3); A bobbin (56) is fixedly mounted between the side walls opposite to the side plate (55); A wire wheel (57), the wire wheel (57) is fixedly arranged in the middle of the wire shaft (56); A crimping roller (58), a crimping roller (58) is arranged above the wire wheel (57), and the end of the crimping roller (58) is rotatably connected to the side plate (55); A high-voltage lead (59), wherein the through hole on the wire locking tongue (53) is provided with the high-voltage lead (59), and the high-voltage lead (59) passes through the top of the wire wheel (57) and the bottom of the wire pressing roller (58) and is connected to the inside of the electric control box (1); The support assembly (4) comprises a lifting unit (41), the lifting unit (41) being arranged on the bottom plate (2) inside the support plate frame (3), the upper end of the lifting unit (41) being fixedly connected to a support box (42), the side wall of the support box (42) facing away from the electric control box (1) being open and a dust collecting frame (43) being slidably arranged inside the support box, a sealing plate (44) being fixedly arranged on the side of the dust collecting frame (43) away from the electric control box (1), the sealing plate (44) and the support box (42) being connected by magnetic attraction, the upper end surface of the support box (42) being arranged with dust leakage holes (45) in a matrix arrangement, and a limit base seat (46) cooperating with the transformer being fixedly installed in the middle of the upper end surface of the support box (42); The lifting unit (41) comprises a first electric push rod (411), the first electric push rod (411) is fixedly arranged in the middle of the upper end surface of the base plate (2), the upper end of the first electric push rod (411) is fixedly connected to the lower end of the support box (42), and strip slide grooves (412) are symmetrically opened on the base plate (2) on both sides of the first electric push rod (411), and slide rods (413) are symmetrically installed in the strip slide grooves (412), and an L-shaped plate (414) is sleeved on the slide rod (413), and a buffer spring (416) is installed between the L-shaped plate (414) and the side wall of the strip slide groove (412), and a pull rod (415) is hinged at the upper end of the L-shaped plate (414), and the upper end of the pull rod (415) is hinged to the lower end surface of the support box (42).

2. A transformer power frequency withstand voltage test device according to claim 1, characterized in that: A vertical plate (21) is fixedly arranged on the upper end surface of the bottom plate (2) and at the bottom of the strip-shaped through groove, a pressure switch (22) is arranged on the opposite side of the vertical plate (21), and an indicator light (23) is arranged on the opposite side of the vertical plate (21), and the indicator light (23) is connected to the pressure switch (22) via a wire.

3. A transformer power frequency withstand voltage test device according to claim 1, characterized in that: A circular frame (421) is fixedly mounted on the upper end surface of the support box (42) and located outside the dust leakage hole (45), and semi-cylindrical convex columns (422) are evenly arranged on the inner side wall of the circular frame (421) from top to bottom.

4. A transformer power frequency withstand voltage test device according to claim 3, characterized in that: The semi-cylindrical convex column (422) is a hollow structure and its arc-shaped surface is a porous structure design, and an electrostatic generator (4221) is installed on the inner side wall of the semi-cylindrical convex column (422).

5. A transformer power frequency withstand voltage test device according to claim 3, characterized in that: A handle (441) is fixedly mounted on the side wall of the sealing plate (44) away from the dust collecting frame (43).

6. A transformer power frequency withstand voltage test device according to claim 1, characterized in that: The lower end of the thread locking plate (52) is fixedly connected to a linkage plate (521).

7. A transformer power frequency withstand voltage test device according to claim 5, characterized in that: The cleaning assembly (6) comprises a second electric push rod (61), the second electric push rod (61) being symmetrically mounted on the upper end of the support plate frame (3), the upper end of the second electric push rod (61) located on the same side being fixedly connected to a strip plate (62), an extension plate (63) being fixedly arranged at a position close to the end of the opposite side of the strip plate (62), a vertical rod (64) being fixedly arranged at the lower end of the extension plate (63), a rubber plate (65) being fixedly arranged at the lower end of the side wall opposite to the vertical rod (64), and flexible cleaning strips (66) being evenly arranged on the side wall opposite to the rubber plate (65).

8. A transformer power frequency withstand voltage test device according to claim 7, characterized in that: The distance between the two opposing rubber plates (65) is smaller than the side length of the circular frame (421).

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