A quality inspection device for power transformers

Abstract

The present invention belongs to the field of power transformer detection, and provides a quality detection device for power transformers, including a detection table, the upper end surface of the detection table is slidably connected to a sliding box, a retractable No. 1 electric rod is connected between the sliding box and the detection table, a plurality of partitions are fixedly arranged in the sliding box, a plurality of cavities are separated by partitions in the sliding box, all cavities are interconnected, the detection table is connected to a water pressure mechanism, and a sealing plate is vertically slid and sealed in each cavity. In the present invention, when some detection probes do not display parameters when detecting a micro power transformer, the No. 3 electric rod is started to drive the corresponding slide plate to move horizontally, and the horizontal position of a single micro power transformer can be adjusted; the pulling mechanism is started, so that the corresponding micro power transformer is further fitted with the detection probe, so as to avoid the conductive plate of the micro power transformer not contacting the detection probe in the vertical direction.

Description

Technical Field

[0001] The invention belongs to the field of power transformer detection, and in particular relates to a quality detection device for a power transformer. Background Art

[0002] A power transformer is a static electrical device that is used to convert a certain value of AC voltage (current) into another or several different values ​​of voltage (current) with the same frequency. A power transformer is a static device with two or more windings. In order to transmit electrical energy, it converts the AC voltage and current of one system into the voltage and current of another system at the same frequency through electromagnetic induction. Usually, the values ​​of these currents and voltages are different.

[0003] When existing power transformer quality inspection equipment inspects multiple micro power transformers at the same time, it is necessary to ensure that the multiple micro power transformers are in stable contact with the corresponding detection probes at the same time. However, the conductive plate of each micro power transformer may have length and curvature errors, which may easily lead to the conductive plates of individual micro power transformers failing to stably contact with the corresponding detection probes during inspection, resulting in detection errors. On the other hand, when the detection current of an individual micro power transformer is too large, the conductive plate of the micro power transformer is elastically squeezed by the detection probe, resulting in the conductive plate failing to break away from the detection probe in time, which may easily cause the micro power transformer to burn out at high temperature. At the same time, the high temperature will affect the entire detection circuit, thereby causing the risk of damage to the remaining micro power transformers. Summary of the invention

[0004] The purpose of the present invention is to provide a quality inspection device for power transformers, aiming to solve the technical problem in the prior art that when inspecting multiple micro power transformers, the guide plates of individual micro power transformers are prone to fail to stably contact with the corresponding detection probes or are disconnected in time.

[0005] The present invention is implemented as follows: a quality inspection device for a power transformer comprises a test bench, the upper end face of the test bench is fixedly connected with a lifting seat, the lifting seat is fixedly connected with a fixing frame, the fixing frame is connected with a plurality of detection probes in parallel, all the detection probes are commonly connected with a test device, the upper end face of the test bench is slidably connected with a sliding box, a retractable No. 1 electric rod is connected between the sliding box and the test bench, a plurality of partitions are fixedly arranged in the sliding box, a plurality of cavities are separated by the partitions in the sliding box, all the cavities are interconnected, the test bench is connected with a water pressure mechanism, the water pressure mechanism is connected with the sliding box, a sealing plate is vertically slidably and sealed in each cavity, one end of the sealing plate is fixedly connected with a rotating seat, the rotating seat is rotatably connected with a rotating frame, the other end of the sealing plate is fixedly connected with a hydraulic thrust mechanism, the hydraulic thrust mechanism is in contact with the rotating frame, and the water pressure mechanism can simultaneously push all the sealing plates up by water pressure;

[0006] The rotating frame is horizontally slidably connected with a slide plate, the slide plate is provided with a positioning mechanism for fixing the micro power transformer, and a No. 3 electric rod is connected between the rotating frame and the slide plate; a pulling mechanism is provided between the sliding box and the rotating frame, and the pulling mechanism can drive the rotating frame to move upward through magnetic force;

[0007] Under the action of water pressure, the hydraulic thrust mechanism can push the rotating frame to flip, and a fixing mechanism is provided between the rotating frame and the sliding box, and the fixing mechanism can flip the rotating frame through magnetic force and keep the rotating frame fixed in a vertical direction.

[0008] Further technical solution: The hydraulic mechanism includes a water tank, a pump, a water pipe and an electromagnetic pressure valve; the bottom surface of the test bench is fixedly connected to the water tank, the water tank is connected to the pump, a water pipe is connected between the pump and the sliding box, and an electromagnetic pressure valve is provided on the water pipe.

[0009] Further technical solution: the hydraulic thrust mechanism includes a sleeve, an electromagnetic stop valve and a push rod;

[0010] The sealing plate is fixedly connected with a sleeve, the inner wall of the sleeve is slidably and sealingly connected with a push rod, the push rod is in contact with the bottom surface of the rotating frame, and the sleeve is connected with an electromagnetic stop valve.

[0011] Further technical solution: the fixing mechanism comprises a No. 1 support frame, a No. 1 electromagnet and a No. 1 magnetic block;

[0012] The No. 1 support frame is fixedly connected to the sliding box, the No. 1 support frame is fixedly connected to the No. 1 electromagnet, and the upper end surface of the rotating frame is fixedly connected to the No. 1 magnetic block. When the rotating frame is flipped, the No. 1 electromagnet can be adsorbed with the No. 1 magnetic block.

[0013] Further technical solution: the pulling mechanism includes a No. 2 support frame, a No. 2 electromagnet and a No. 2 magnetic block;

[0014] The No. 2 support frame is fixedly connected to the sliding box, the No. 2 support frame is fixedly connected with a No. 2 electromagnet, the rotating frame is fixedly connected with a No. 2 magnetic block, the No. 2 electromagnet is directly opposite to the No. 2 magnetic block, and the No. 2 magnetic block is arranged at an end away from the hydraulic thrust mechanism.

[0015] Further technical solution: The positioning mechanism includes a clamp, a dual-axis motor and a threaded rod; the dual-axis motor is fixedly connected to the skateboard, and the output shafts at both ends of the dual-axis motor are connected to threaded rods, the spiral directions of the two threaded rods are opposite, and the upper end surface of the rotating frame is slidably connected to two clamps, and the two clamps are threadedly connected to the two threaded rods respectively.

[0016] Further technical solution: the opposing surfaces of the two clamps are both inclined surfaces, and the inclined surfaces of the two clamps can contact the side walls of the micro power transformer, thereby increasing the positioning accuracy of the micro power transformer.

[0017] Further technical solution: a mesh plate is arranged in each cavity.

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

[0019] 1. Start all the detection probes close to each micro power transformer, and start the hydraulic mechanism, which can push all the sealing plates up at the same time through water pressure, so that all the sealing plates drive each micro power transformer to maintain the same contact force with the corresponding detection probe;

[0020] 2. When some detection probes fail to display parameters when detecting the micro power transformer, start the No. 3 electric rod to drive the corresponding slide to move horizontally, so as to adjust the horizontal position of a single micro power transformer; start the pulling mechanism, which generates an upward suction force on the rotating frame and the sealing plate, so that the corresponding micro power transformer is further fitted with the detection probe, so as to avoid the conductive plate of the micro power transformer not contacting the detection probe in the vertical direction due to excessive friction between the sealing plate and the cavity; the above method can avoid detection errors caused by the conductive plate of the micro power transformer not contacting the detection probe;

[0021] 3. When some detection probes show that the detection current is too large during detection of the micro power transformer, the No. 3 electric rod is started to drive the corresponding slide to move horizontally, so as to adjust the horizontal position of a single micro power transformer; then the electromagnetic stop valve is started to release the seal of the sleeve, and the liquid flow in the sliding box pushes the push rod under the action of pressure, and the push rod pushes the rotating frame to flip, and the rotating frame drives the conductive plate of the micro power transformer to quickly move away from the corresponding detection probe, thereby avoiding high temperature fire of the micro power transformer;

[0022] 4. When the push rod pops up, the water level in the sliding box drops, and all the sealing plates move downward, so that the conductive plates of all micro-power transformers are separated from the corresponding detection probes to avoid short circuits that cause the remaining micro-power transformers to burn out;

[0023] 5. When the push rod pushes the rotating frame to flip, the No. 1 electromagnet is activated to conduct electricity, and the No. 1 electromagnet absorbs the No. 1 magnetic block to accelerate the flipping. At the same time, when the No. 1 electromagnet is absorbed by the No. 1 magnetic block, the rotating frame can be fixed in the vertical direction, so that the faulty micro-power transformer is away from the other micro-power transformers. At the same time, the absorption of the No. 1 electromagnet to the No. 1 magnetic block can prevent the micro-power transformer from falling to the original path during the flipping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the water pressure mechanism in the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of each mechanism of the sliding box in the present invention.

[0027] Figure 4 It is a structural schematic diagram of the hydraulic thrust mechanism in the present invention.

[0028] Figure 5 It is a structural schematic diagram of the fixing mechanism and the tension mechanism in the present invention.

[0029] Figure 6 It is a structural schematic diagram of the positioning mechanism in the present invention.

[0030] In the attached drawings: 1. test bench; 2. sliding box; 3. No. 1 electric rod; 4. hydraulic mechanism; 41. water tank; 42. pump; 43. water pipe; 44. electromagnetic pressure valve; 5. positioning mechanism; 51. fixture; 52. dual-axis motor; 53. threaded rod; 6. hydraulic thrust mechanism; 61. sleeve; 62. electromagnetic stop valve; 63. push rod; 7. fixing mechanism; 71. No. 1 support frame; 72. No. 1 electromagnet; 73. No. 1 magnetic block; 8. pulling mechanism; 81. No. 2 support frame; 82. No. 2 electromagnet; 83. No. 2 magnetic block; 9. slide plate; 10. rotating seat; 11. lifting seat; 12. fixing frame; 13. detection probe; 14. partition; 15. cavity; 16. sealing plate; 17. rotating frame; 18. No. 3 electric rod. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0033] like Figure 1-Figure 6 As shown, a quality inspection device for a power transformer provided by the present invention comprises an inspection platform 1, wherein the upper end surface of the inspection platform 1 is fixedly connected with a lifting seat 11, wherein the lifting seat 11 is fixedly connected with a fixing frame 12, wherein the fixing frame 12 is connected with a plurality of inspection probes 13 in parallel, wherein all the inspection probes 13 are connected with a testing device in common, wherein the upper end surface of the inspection platform 1 is slidably connected with a sliding box 2, wherein a retractable No. 1 electric rod 3 is connected between the sliding box 2 and the inspection platform 1, wherein a plurality of partitions 14 are fixedly arranged in the sliding box 2, wherein the sliding box 2 is partitioned by a plurality of partitions 14. The plate 14 separates a plurality of cavities 15, and all the cavities 15 are interconnected. The detection table 1 is connected to a hydraulic mechanism 4, and the hydraulic mechanism 4 is connected to the sliding box 2. A sealing plate 16 is vertically slidable and sealed in each cavity 15, and one end of the sealing plate 16 is fixedly connected to a rotating seat 10, and the rotating seat 10 is rotatably connected to a rotating frame 17. The other end of the sealing plate 16 is fixedly connected to a hydraulic thrust mechanism 6, and the hydraulic thrust mechanism 6 is in contact with the rotating frame 17. The hydraulic mechanism 4 can simultaneously push all the sealing plates 16 upward by water pressure;

[0034] The rotating frame 17 is horizontally slidably connected with a slide plate 9, and the slide plate 9 is provided with a positioning mechanism 5 for fixing the micro power transformer, and a third electric rod 18 is connected between the rotating frame 17 and the slide plate 9; a pulling mechanism 8 is provided between the sliding box 2 and the rotating frame 17, and the pulling mechanism 8 can drive the rotating frame 17 to move upward through magnetic force;

[0035] Under the action of water pressure, the hydraulic thrust mechanism 6 can push the rotating frame 17 to flip. A fixing mechanism 7 is provided between the rotating frame 17 and the sliding box 2. The fixing mechanism 7 can flip the rotating frame 17 through magnetic force and keep the rotating frame 17 fixed in the vertical direction.

[0036] In this embodiment, all micro power transformers are placed on the slide plate 9 in sequence, and the micro power transformers are fixed by various positioning mechanisms 5, and then the No. 1 electric rod 3 is started, and the No. 1 electric rod 3 pushes the sliding box 2 to move on the upper end surface of the detection table 1 until the conductive plates of all micro power transformers are directly below the corresponding detection probes 13. At this time, all detection probes 13 are started to approach each micro power transformer, and the hydraulic mechanism 4 is started. The hydraulic mechanism 4 can simultaneously push all sealing plates 16 upward through water pressure, and all sealing plates 16 drive each micro power transformer to maintain the same contact force with the corresponding detection probes 13;

[0037] When some detection probes 13 do not display parameters when detecting the micro power transformer, it means that the conductive plate of the micro power transformer is not in contact with the detection probe 13 or the micro power transformer is faulty. The No. 3 electric rod 18 is started to drive the corresponding slide plate 9 to move horizontally, so as to adjust the horizontal position of a single micro power transformer; the pulling mechanism 8 is started, and the pulling mechanism 8 generates an upward suction force on the rotating frame 17 and the sealing plate 16, so that the corresponding micro power transformer is further fitted with the detection probe 13, so as to avoid the conductive plate of the micro power transformer not contacting with the detection probe 13 in the vertical direction due to excessive friction between the sealing plate 16 and the cavity 15; the above method can avoid detection errors caused by the conductive plate of the micro power transformer not contacting with the detection probe 13;

[0038] When some of the detection probes 13 show that the detection current is too large during detection of the micro power transformer, the No. 3 electric rod 18 is started to drive the micro power transformer to quickly break contact with the micro power transformer from the horizontal direction, and the hydraulic thrust mechanism 6 is started. The hydraulic thrust mechanism 6 can push the rotating frame 17 to flip, and the fixing mechanism 7 can use magnetic force to further flip the rotating frame 17 and keep the rotating frame 17 fixed in the vertical direction, so that the conductive plate of the micro power transformer is quickly away from the detection probe 13; at this time, the water pressure in the sliding box 2 drops, and the remaining detection probes 13 break contact with the conductive plate of the micro power transformer, thereby avoiding short circuit and causing the remaining micro power transformers to burn out.

[0039] like Figure 2 As shown, a quality inspection device for a power transformer provided by the present invention is provided, wherein the hydraulic mechanism 4 comprises a water tank 41, a pump 42, a water pipe 43 and an electromagnetic pressure valve 44; the bottom surface of the inspection platform 1 is fixedly connected with the water tank 41, the water tank 41 is connected with the pump 42, the pump 42 is connected with the sliding box 2 via a water pipe 43, and the water pipe 43 is provided with an electromagnetic pressure valve 44.

[0040] In this embodiment, the pump 42 is started, and the pump 42 delivers the liquid in the water tank 41 into the sliding box 2 through the water pipe 43. At this time, driven by the liquid flow, all the sealing plates 16 move upward at the same time, and all the sealing plates 16 simultaneously drive the connected micro-electric transformers to abut against the corresponding detection probes 13 with the same contact force. When the liquid pressure in the sliding box 2 reaches a certain value, the electromagnetic pressure valve 44 cuts off the water pipe 43, so that a stable liquid pressure is maintained between all the micro-electric transformers and the corresponding detection probes 13.

[0041] like Figure 4 As shown, a quality inspection device for a power transformer provided by the present invention is provided, wherein the hydraulic thrust mechanism 6 comprises a sleeve 61, an electromagnetic stop valve 62 and a push rod 63;

[0042] The sealing plate 16 is fixedly connected with a sleeve 61 , and a push rod 63 is slidably and sealedly connected to the inner wall of the sleeve 61 . The push rod 63 contacts the bottom surface of the rotating frame 17 , and an electromagnetic stop valve 62 is connected to the sleeve 61 .

[0043] In this embodiment, when some detection probes 13 detect the micro-power transformer and show that the detection current is too large, the No. 3 electric rod 18 is started to drive the corresponding slide plate 9 to move horizontally, so as to adjust the horizontal position of a single micro-power transformer; then the electromagnetic stop valve 62 is started to release the seal of the sleeve 61, and the liquid flow in the sliding box 2 pushes the push rod 63 under the action of pressure, and the push rod 63 pushes the rotating frame 17 to flip, and the rotating frame 17 drives the conductive plate of the micro-power transformer to quickly move away from the corresponding detection probe 13, thereby preventing the micro-power transformer from catching fire due to high temperature;

[0044] When the push rod 63 pops up, the water level in the sliding box 2 drops, and all the sealing plates 16 move downward, so that the conductive plates of all the micro-power transformers are separated from the corresponding detection probes 13, avoiding short circuits that cause the remaining micro-power transformers to burn out.

[0045] like Figure 5 As shown, a quality inspection device for a power transformer provided by the present invention is provided, wherein the fixing mechanism 7 comprises a first support frame 71, a first electromagnet 72 and a first magnetic block 73;

[0046] The No. 1 support frame 71 is fixedly connected to the sliding box 2, and the No. 1 support frame 71 is fixedly connected to the No. 1 electromagnet 72. The upper end surface of the rotating frame 17 is fixedly connected to the No. 1 magnetic block 73. When the rotating frame 17 is flipped, the No. 1 electromagnet 72 can be adsorbed by the No. 1 magnetic block 73.

[0047] In this embodiment, when the push rod 63 pushes the rotating frame 17 to flip, the No. 1 electromagnet 72 is activated to conduct electricity, and the No. 1 electromagnet 72 adsorbs the No. 1 magnetic block 73 to accelerate the flipping. At the same time, when the No. 1 electromagnet 72 and the No. 1 magnetic block 73 are adsorbed, the rotating frame 17 can be fixed in the vertical direction, so that the faulty micro power transformer is away from the other micro power transformers. At the same time, the adsorption of the No. 1 electromagnet 72 on the No. 1 magnetic block 73 can prevent the micro power transformer from falling to the original path during the flipping process.

[0048] like Figure 5 As shown, a quality inspection device for a power transformer provided by the present invention is provided, wherein the tension mechanism 8 comprises a second support frame 81, a second electromagnet 82 and a second magnetic block 83;

[0049] The No. 2 support frame 81 is fixedly connected to the sliding box 2, the No. 2 support frame 81 is fixedly connected with the No. 2 electromagnet 82, the rotating frame 17 is fixedly connected with the No. 2 magnetic block 83, the No. 2 electromagnet 82 is directly opposite to the No. 2 magnetic block 83, and the No. 2 magnetic block 83 is arranged at an end away from the hydraulic thrust mechanism 6.

[0050] In this embodiment, when some detection probes 13 detect no parameters on the micro power transformer, the second electromagnet 82 is started to conduct electricity, the second electromagnet 82 attracts the second magnetic block 83, and the second magnetic block 83 drives the rotating frame 17 and the sealing plate 16 to move upward along the inner wall of the cavity 15. At this time, the micro power transformer further contacts the corresponding detection probe 13.

[0051] like Figure 6 As shown, a quality inspection device for a power transformer provided by the present invention, the positioning mechanism 5 includes a clamp 51, a dual-axis motor 52 and a threaded rod 53; the dual-axis motor 52 is fixedly connected to the slide 9, and the output shafts at both ends of the dual-axis motor 52 are connected to the threaded rod 53, and the spiral directions of the two threaded rods 53 are opposite, and the upper end surface of the rotating frame 17 is slidably connected to two clamps 51, and the two clamps 51 are threadedly connected to the two threaded rods 53 respectively.

[0052] In this embodiment, the dual-axis motor 52 is started, and the dual-axis motor 52 drives the two threaded rods 53 to rotate. The two threaded rods 53 drive the two clamps 51 to move relative to each other through thread transmission. The two clamps 51 clamp and position the micro power transformer together.

[0053] like Figure 6 As shown, a quality inspection device for a power transformer provided by the present invention is provided, and the opposing surfaces of the two clamps 51 are both inclined surfaces, and the inclined surfaces of the two clamps 51 can contact the side walls of the micro power transformer, thereby increasing the positioning accuracy of the micro power transformer.

[0054] The present invention provides a quality inspection device for a power transformer, wherein a mesh plate is arranged in each cavity 15 .

[0055] In this embodiment, the mesh plate can increase the stability of the liquid flow in the sliding box 2, thereby preventing the sealing plate 16 from shaking up and down due to unstable liquid flow when the sealing plate 16 rises or falls.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A quality inspection device for a power transformer, comprising a testing platform (1), characterized in that: The upper end surface of the detection platform (1) is slidably connected to a sliding box (2), a retractable No. 1 electric rod (3) is connected between the sliding box (2) and the detection platform (1), a plurality of partitions (14) are fixedly arranged in the sliding box (2), a plurality of cavities (15) are separated in the sliding box (2) by the partitions (14), and all the cavities (15) are interconnected, the detection platform (1) is connected to a water pressure mechanism (4), the water pressure mechanism (4) is connected to the sliding box (2), a sealing plate (16) is vertically slidably and sealedly connected in each cavity (15), one end of the sealing plate (16) is fixedly connected to a rotating seat (10), the rotating seat (10) is rotatably connected to a rotating frame (17), the other end of the sealing plate (16) is fixedly connected to a hydraulic thrust mechanism (6), the hydraulic thrust mechanism (6) is in contact with the rotating frame (17), and the water pressure mechanism (4) can simultaneously push all the sealing plates (16) upward by water pressure; A slide plate (9) is horizontally slidably connected to the rotating frame (17), a positioning mechanism (5) for fixing the micro power transformer is provided on the slide plate (9), and a third electric rod (18) is connected between the rotating frame (17) and the slide plate (9); a pulling mechanism (8) is provided between the sliding box (2) and the rotating frame (17), and the pulling mechanism (8) can drive the rotating frame (17) to move upwards through magnetic force; Under the action of water pressure, the hydraulic thrust mechanism (6) can push the rotating frame (17) to flip, and a fixing mechanism (7) is provided between the rotating frame (17) and the sliding box (2), and the fixing mechanism (7) can flip the rotating frame (17) and keep the rotating frame (17) fixed in a vertical direction through magnetic force; The hydraulic thrust mechanism (6) comprises a sleeve (61), an electromagnetic stop valve (62) and a push rod (63); the sealing plate (16) is fixedly connected to the sleeve (61); the inner wall of the sleeve (61) is slidably and sealingly connected to the push rod (63); the push rod (63) is in contact with the bottom surface of the rotating frame (17); and the sleeve (61) is connected to the electromagnetic stop valve (62); The fixing mechanism (7) comprises a No. 1 support frame (71), a No. 1 electromagnet (72) and a No. 1 magnetic block (73); the No. 1 support frame (71) is fixedly connected to the sliding box (2); the No. 1 support frame (71) is fixedly connected to the No. 1 electromagnet (72); the upper end surface of the rotating frame (17) is fixedly connected to the No. 1 magnetic block (73); when the rotating frame (17) is turned over, the No. 1 electromagnet (72) can be adsorbed by the No. 1 magnetic block (73).

2. The quality inspection device for power transformer according to claim 1, characterized in that: The hydraulic mechanism (4) comprises a water tank (41), a pump (42), a water pipe (43) and an electromagnetic pressure valve (44); the bottom surface of the test bench (1) is fixedly connected to the water tank (41), the water tank (41) is connected to the pump (42), the pump (42) and the sliding box (2) are connected by a water pipe (43), and the water pipe (43) is provided with an electromagnetic pressure valve (44).

3. The quality inspection device for power transformer according to claim 1, characterized in that: The pulling mechanism (8) comprises a second support frame (81), a second electromagnet (82) and a second magnetic block (83); The second support frame (81) is fixedly connected to the sliding box (2), the second support frame (81) is fixedly connected to a second electromagnet (82), the rotating frame (17) is fixedly connected to a second magnetic block (83), the second electromagnet (82) is directly opposite to the second magnetic block (83), and the second magnetic block (83) is arranged at an end away from the hydraulic thrust mechanism (6).

4. The quality inspection device for power transformer according to claim 1, characterized in that: The positioning mechanism (5) comprises a clamp (51), a dual-axis motor (52) and a threaded rod (53); the dual-axis motor (52) is fixedly connected to the slide plate (9); both end output shafts of the dual-axis motor (52) are connected to the threaded rod (53); the spiral directions of the two threaded rods (53) are opposite; the upper end surface of the rotating frame (17) is slidably connected to the two clamps (51); the two clamps (51) are respectively threadedly connected to the two threaded rods (53).

5. The quality inspection device for power transformer according to claim 4, characterized in that: The opposing surfaces of the two clamps (51) are both inclined surfaces, and the inclined surfaces of the two clamps (51) can contact the side wall of the micro power transformer, thereby increasing the positioning accuracy of the micro power transformer.

6. The quality inspection equipment for power transformer according to claim 1, characterized in that: A mesh plate is arranged in each cavity (15).

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