Detachable transformer body pressing device and replacement method

Abstract

The invention provides a detachable transformer body pressing device and a replacement method, and belongs to the technical field of transformers. The detachable transformer body pressing device comprises an insulating plate, a first insulating block and an upper clamping piece, the insulating plate is arranged at the upper end of a coil and comprises a plurality of groups of spliced side edge sub insulating plates and middle sub insulating plates, the first insulating block is arranged above the insulating plate, and the upper clamping piece is arranged above the first insulating block. The first insulation blocks comprise multiple sets of first insulator blocks arranged in a stacked mode, the upper clamping pieces are arranged above the first insulation blocks, and the two sets of upper clamping pieces are arranged on the front side and the rear side of the upper iron yoke respectively. According to the detachable transformer body pressing device provided by the invention, the insulating plate and the first insulating block are both of a split structure, during replacement, a defective part of a defective part can be withdrawn and replaced according to needs, the whole defective part does not need to be replaced, the replacement time is shortened, the replacement efficiency is improved, the device does not need to be put into a furnace again for drying, and the replacement cost is reduced. And the duration is further shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a detachable transformer body pressing device and a replacement method. Background Art

[0002] The transformer is one of the indispensable equipment in the process of power transmission. The coil of the transformer is assembled on the outside of the iron core. After the coil is assembled, it is necessary to apply sufficient clamping force to the coil. The clamping force on the coil is directly related to the transformer's ability to withstand short circuits. Generally, a clamping component is installed on the upper part of the coil to clamp the coil. The clamping component is located on the upper part of the transformer coil. Therefore, the electric field strength at the location of the clamping component is relatively high. If there are bubbles, metal foreign matter or other impurity defects in the clamping component, the defects of the clamping component will cause partial discharge during the transformer performance test, affecting the safe operation of the transformer, and the defective components need to be replaced. During the replacement process, the following steps are generally followed: remove the lead wire, cancel the clamping, remove the clamp on the core, remove the iron yoke on the core, remove and replace the defective parts, reinstall the iron yoke, reinstall the clamp, reinstall the lead wire, put it into the furnace for drying (because the body is exposed to the air for a long time, it needs to be put into the furnace for drying again), reassemble the oil tank and casing, fill the oil, and retest. The whole cycle takes about five to six days. The replacement of the clamping parts takes a long time, is labor-intensive, has complicated procedures, and increases production costs. Summary of the invention

[0003] The object of the present invention is to provide a detachable transformer body pressing device and a replacement method, aiming to solve the problems that the pressing parts of the transformer are difficult to replace, the replacement period is long, and the replacement cost is high.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a detachable transformer body clamping device, including an insulating plate, a first insulating block and an upper clamp, the insulating plate is arranged at the upper end of the coil, the insulating plate includes multiple groups of spliced ​​side sub-insulating plates and middle sub-insulating plates, the first insulating block is arranged above the insulating plate, the first insulating block includes multiple groups stacked in a first insulator block, the upper clamp is arranged above the first insulating block, and the two groups of the upper clamps are respectively arranged on the front and rear sides of the upper iron yoke.

[0005] In a possible implementation, a plurality of groups of insulating spacers are disposed below the insulating plate, and the insulating spacers are disposed corresponding to the spacers at the upper end of the coil.

[0006] In a possible implementation, the insulating plate is in a circular ring shape, and includes two groups of side sub-insulating plates and two groups of middle sub-insulating plates. The two groups of side sub-insulating plates are arranged opposite to each other, and the two groups of middle sub-insulating plates are arranged opposite to each other, and the middle sub-insulating plate is arranged between the ends on the same side of the two groups of side sub-insulating plates.

[0007] In a possible implementation, a pressing plate is disposed above the insulating plate, and the pressing plate includes a plurality of groups of spliced ​​side sub-pressing plates and a middle sub-pressing plate.

[0008] In one possible implementation, the pressure plate is in a circular ring shape, and includes two groups of side sub-pressure plates and two groups of middle sub-pressure plates. The two groups of side sub-pressure plates are arranged opposite to each other, and the two groups of middle sub-pressure plates are arranged opposite to each other, and the middle sub-pressure plate is arranged between the ends on the same side of the two groups of side sub-pressure plates.

[0009] In a possible implementation, a first assembling piece is disposed at the end of the side sub-pressing plate, and a second assembling piece is disposed at the end of the middle sub-pressing plate, and the first assembling piece and the second assembling piece match each other.

[0010] In a possible implementation, a plurality of groups of plugs are arranged above the insulating plate, and the plugs are arranged below the upper iron yoke.

[0011] In a possible implementation, a second insulating block is disposed above the insulating plate, and the second insulating block is disposed at an end of the insulating plate and on an inner side of the upper clamp.

[0012] In a possible implementation manner, the first insulating block is distributed in the middle of the insulating plate.

[0013] A method for replacing a detachable transformer body pressing device is provided, using the detachable transformer body pressing device as described in any one of the above, comprising the following steps: S1, remove the lead; S2, cancel the compaction; S3, remove and replace the defective part of the defective component; S4. Assemble the oil tank and casing; S5, oil filling; S6. Repeat the test.

[0014] The beneficial effects of the detachable transformer body pressing device provided by the present invention are: Compared with the prior art, an insulating plate, a first insulating block and an upper clamp are provided, the insulating plate is arranged on the coil, the insulating plate includes a side sub-insulating plate and a middle sub-insulating plate, which are spliced ​​by multiple groups of side sub-insulating plates and middle sub-insulating plates, the first insulating block is arranged on the insulating plate, the first insulating block includes a first insulator block, which is stacked by multiple groups of first insulator blocks, two groups of upper clamps are provided, which are arranged above the first insulating block and are respectively arranged on the front and rear sides of the upper iron yoke, the insulating plate and the first insulating block are both split structures, when replacing, there is no need to disassemble the upper clamp and the upper iron yoke, the defective part of the defective component can be withdrawn and replaced as needed, there is no need to replace the entire defective component, the replacement time is shortened, the replacement efficiency is improved, there is no need to put the device into the furnace for drying again, the time is further shortened, the labor intensity of the operator is greatly reduced, and the repair cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic front view of the structure of a detachable transformer body pressing device provided in an embodiment of the present invention; Figure 2 A schematic side view of the structure of a detachable transformer body pressing device provided in an embodiment of the present invention; Figure 3 A schematic diagram of the top view of the structure of a detachable transformer body pressing device provided in an embodiment of the present invention; Figure 4 A schematic diagram of the top view of the insulating plate used in an embodiment of the present invention; Figure 5 An exploded structural diagram of an insulating plate used in an embodiment of the present invention; Figure 6 A schematic side view of the structure of an insulating plate used in an embodiment of the present invention; Figure 7 A schematic diagram of the top view of the pressing plate used in an embodiment of the present invention; Figure 8 An exploded structural diagram of a pressure plate used in an embodiment of the present invention; Fig. 9 A schematic side view of the structure of a first insulating block used in an embodiment of the present invention; Fig.10 This is a schematic top view of the structure of the first insulating block used in an embodiment of the present invention.

[0017] In the figure: 1. upper clamp; 2. upper iron yoke; 3. insulating spacer; 4. insulating plate; 5. side sub-insulating plate; 6. middle sub-insulating plate; 7. crimping edge; 8. pressing plate; 9. side sub-pressing plate; 10. spliced ​​lower plate; 11. lower splicing strip; 12. middle sub-pressing plate; 13. spliced ​​upper plate; 14. upper splicing strip; 15. first insulating block; 16. first insulator block; 17. first vertical groove; 18. second vertical groove; 19. first horizontal groove; 20. second insulating block; 21. plug block. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by 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.

[0019] Please refer to Figures 1 to 6 A specific embodiment of a detachable transformer body pressing device provided by the present invention is now described, including an insulating plate 4, a first insulating block 15 and an upper clamp 1, the insulating plate 4 is arranged at the upper end of the coil 1, the insulating plate 4 includes a plurality of groups of spliced ​​side sub-insulating plates 5 and a middle sub-insulating plate 6, the first insulating block 15 is arranged above the insulating plate 4, the first insulating block 15 includes a plurality of groups of stacked first insulator blocks 16, the upper clamp 1 is arranged above the first insulating block 15, and the two groups of upper clamps 1 are respectively arranged on the front and rear sides of the upper iron yoke 2.

[0020] The present invention provides a detachable transformer body pressing device. Compared with the prior art, the present invention is provided with an insulating plate 4, a first insulating block 15 and an upper clamp 1. The insulating plate 4 is arranged on the coil 1. The insulating plate 4 includes a side sub-insulating plate 5 and a middle sub-insulating plate 6, which are spliced ​​by multiple groups of side sub-insulating plates 5 and middle sub-insulating plates 6. The first insulating block 15 is arranged on the insulating plate 4. The first insulating block 15 includes a first insulator block 16, which is stacked by multiple groups of first insulator blocks 16. The upper clamp 1 is provided with two groups, which are arranged above the first insulating block 15 and are respectively arranged on the front and rear sides of the upper iron yoke 2. The insulating plate 4 and the first insulating block 15 are both split structures. When replacing, there is no need to disassemble the upper clamp 1 and the upper iron yoke 2. The defective part of the defective component can be withdrawn and replaced as needed, and there is no need to replace the entire defective component, which shortens the replacement time and improves the replacement efficiency. There is no need to put the device into the furnace for drying again, which further shortens the time, greatly reduces the labor intensity of the operator, and reduces the repair cost.

[0021] For details, please refer to Figures 1 to 6, including an insulating plate 4, a first insulating block 15 and an upper clamp 1. The insulating plate 4 is arranged at the upper end of the coil 1, which helps to disperse the pressure to the upper end of the coil 1, has an insulating effect, and is used to isolate the oil channel. The insulating plate 4 is a split structure, and the insulating plate 4 is assembled by a side sub-insulating plate 5 and a middle sub-insulating plate 6. During the test, if a part of the insulating plate 4 is defective, the defective part of the insulating plate 4 is released, the defective part is withdrawn, and the intact part is replaced. There is no need to replace the insulating plate 4 as a whole. Therefore, during the replacement process, there is no need to disassemble the upper clamp 1 and the upper iron yoke 2. The first insulating block 15 is arranged on the insulating plate 4, which helps to compress the coil 1. The first insulating block 15 is provided with multiple groups, which are distributed along the left and right length directions of the transformer. The first insulating block 15 is provided with two rows, front and back. The upper clamp 1 is provided with two groups. The upper clamp 1 on the front side is arranged on the first insulating block 15 in the front row, and the rear side of the first insulating block 15 on the front side is cut. The upper clamp 1 on the rear side is arranged on the first insulating block 15 in the rear row, and the front side of the first insulating block 15 on the rear side is cut. The two groups of upper clamps 1 are clamped on the front and rear side walls of the upper iron yoke 2. The first insulating block 15 is a split structure. The first insulating block 15 consists of multiple groups of the first insulating blocks. The first insulator blocks 16 are stacked, and the thickness of the multiple groups of first insulator blocks 16 is different. The upper end surface of the first insulator block 16 at the top is provided with a first mounting groove matching the fixing member of the upper clamp 1, so as to facilitate the installation of the upper clamp 1. The first mounting groove includes two groups of first vertical grooves 17 and one group of first horizontal grooves 19. The two groups of first vertical grooves 17 are symmetrically arranged at the left and right ends of the first insulator block 16 at the top. The first horizontal groove 19 is mounted on one end of the two groups of first vertical grooves 17 close to the upper clamp 1. The first horizontal groove 19 is arranged along the edge of the upper end surface of the first insulator block 16 at the top. A first bundling hole is provided on the block 16, and the insulating tape passes through the first bundling hole and is wrapped and bundled on the outside of multiple groups of first insulator blocks 16 to increase the stability of the device. If a component of the first insulating block 15 is defective, the bundling and fixation of the defective component of the first insulating block 15 is released, the defective component is withdrawn, and the intact component is replaced. There is no need to replace the entire first insulating block 15. Therefore, during the replacement process, there is no need to disassemble the upper clamp 1 and the upper iron yoke 2, which shortens the replacement time and improves the replacement efficiency. There is no need to put the device back into the furnace for drying, which greatly reduces the labor intensity of the operator and reduces the repair cost.

[0022] As a specific implementation of the detachable transformer body pressing device provided by the present invention, please refer to Figures 1 to 6 A plurality of insulating spacers 3 are arranged below the insulating plate 4 , and the insulating spacers 3 are arranged corresponding to the spacers at the upper end of the coil 1 .

[0023] For details, please refer to Figures 1 to 6The insulating spacer 3 is arranged between the insulating plate 4 and the coil 1. The insulating spacer 3 is bonded to the lower end surface of the insulating plate 4. The insulating spacer 3 and the spacer at the upper end of the coil 1 are arranged one by one. Multiple groups of insulating spacers 3 are radially distributed along the circumferential direction of the insulating plate 4. The insulating plate 4 is used to strengthen insulation. The gaps between the insulating spacers 3 form channels for the flow of insulating oil, which is beneficial to the circulation and heat dissipation of the insulating oil.

[0024] As a specific implementation of the detachable transformer body pressing device provided by the present invention, please refer to Figures 1 to 6 The insulating plate 4 is in a circular ring shape, and includes two groups of side sub-insulating plates 5 and two groups of middle sub-insulating plates 6. The two groups of side sub-insulating plates 5 are arranged opposite to each other, and the two groups of middle sub-insulating plates 6 are arranged opposite to each other, and the middle sub-insulating plate 6 is arranged between the ends of the two groups of side sub-insulating plates 5 on the same side.

[0025] For details, please refer to Figures 1 to 6 The insulating plate 4 is annular, and includes a side sub-insulating plate 5 and a middle sub-insulating plate 6. Two groups of side sub-insulating plates 5 are provided, and the two groups of side sub-insulating plates 5 are arranged opposite to each other. Two groups of middle sub-insulating plates 6 are provided, and the two groups of middle sub-insulating plates 6 are arranged opposite to each other. The two groups of side sub-insulating plates 5 are respectively arranged on the left and right sides of the middle sub-insulating plate 6. The central angle of the side sub-insulating plate 5 is greater than the central angle of the middle sub-insulating plate 6. The left and right ends of the middle sub-insulating plate 6 are provided with crimping edges 7. When the side sub-insulating plate 5 and the middle sub-insulating plate 6 are installed, the crimping edge 7 is arranged below the end of the side sub-insulating plate 5. A second bundling hole is provided at the crimping edge 7 and the end of the side sub-insulating plate 5. The insulating tape passes through the second bundling hole to bundle the side sub-insulating plate 5 and the middle sub-insulating plate 6.

[0026] As a specific implementation of the detachable transformer body pressing device provided by the present invention, please refer to Figures 1 to 3 , Figure 7 , Figure 8 A pressing plate 8 is arranged above the insulating plate 4, and the pressing plate 8 includes a plurality of groups of spliced ​​side sub-pressing plates 9 and a middle sub-pressing plate 12.

[0027] For details, please refer to Figures 1 to 3 , Figure 7 , Figure 8 The pressing plate 8 is arranged above the insulating plate 4 to facilitate the transmission of pressure and to press the coil 1. The pressing plate 8 is a split structure, and the pressing plate 8 is assembled by the side sub-pressing plate 9 and the middle sub-pressing plate 12. During the test, if a component of the pressing plate 8 is defective, the defective component of the pressing plate 8 is released, the defective component is removed, and the intact component is replaced. There is no need to replace the entire pressing plate 8. Therefore, during the replacement process, there is no need to disassemble the upper clamp 1 and the upper iron yoke 2.

[0028] As a specific implementation of the detachable transformer body pressing device provided by the present invention, please refer to Figures 1 to 3 , Figure 7 , Figure 8 The pressing plate 8 is in a circular ring shape, and includes two groups of side sub-pressing plates 9 and two groups of middle sub-pressing plates 12. The two groups of side sub-pressing plates 9 are arranged opposite to each other, and the two groups of middle sub-pressing plates 12 are arranged opposite to each other, and the middle sub-pressing plates 12 are arranged between the ends of the two groups of side sub-pressing plates 9 on the same side.

[0029] For details, please refer to Figures 1 to 3 , Figure 7 , Figure 8 The pressing plate 8 is in a circular ring shape, and two groups of side sub-pressing plates 9 are provided, and the two groups of side sub-pressing plates 9 are arranged opposite to each other. Two groups of middle sub-pressing plates 12 are provided, and the two groups of middle sub-pressing plates 12 are arranged opposite to each other. The two groups of side sub-pressing plates 9 are respectively arranged on the left and right sides of the middle sub-pressing plate 12, and the central angle of the side sub-pressing plate 9 is greater than the central angle of the middle sub-pressing plate 12.

[0030] As a specific implementation of the detachable transformer body pressing device provided by the present invention, please refer to Figures 1 to 3 , Figure 7 , Figure 8 A first splicing piece is disposed at the end of the side sub-pressing plate 9, and a second splicing piece is disposed at the end of the middle sub-pressing plate 12, and the first splicing piece and the second splicing piece match each other.

[0031] For details, please refer to Figures 1 to 3 , Figure 7 , Figure 8 The end of the side sub-pressing plate 9 is provided with a first splicing piece, the first splicing piece includes a splicing lower plate 10 and a lower splicing strip 11, the splicing lower plate 10 is extended along the lower end surface of the side sub-pressing plate 9, and the thickness of the splicing lower plate 10 is less than the thickness of the side sub-pressing plate 9, multiple groups of lower splicing strips 11 are arranged on the upper end surface of the splicing lower plate 10, and the multiple groups of lower splicing strips 11 are arranged at intervals, and the end of the middle sub-pressing plate 12 is provided with a second splicing piece, and the second splicing piece includes a splicing upper plate 13 And an upper splicing strip 14, the spliced ​​upper plate 13 is extended along the upper end surface of the middle sub-pressing plate 12, and the thickness of the spliced ​​upper plate 13 is less than the thickness of the middle sub-pressing plate 12, multiple groups of upper splicing strips 14 are arranged on the lower end surface of the spliced ​​upper plate 13, and the multiple groups of upper splicing strips 14 are arranged at intervals. When installed, the upper splicing strips 14 are located in the grooves between the lower splicing strips 11, and the lower splicing strips 11 are located in the grooves between the upper splicing strips 14, and the first splicing piece and the second splicing piece match each other.

[0032] As a specific implementation of the detachable transformer body pressing device provided by the present invention, please refer to Figure 2 A plurality of groups of plugs 21 are arranged above the insulating plate 4 , and the plugs 21 are arranged below the upper iron yoke 2 .

[0033] For details, please refer to Figure 2 There are multiple groups of plug blocks 21, which are arranged between the pressure plate 8 and the upper iron yoke 2. The multiple groups of plug blocks 21 are distributed along the left and right length directions of the transformer. The plug blocks 21 are located between the two groups of upper clamps 1. The plug blocks 21 are split structures. The plug blocks 21 are composed of multiple groups of sub-plug blocks 21 stacked in an array. The thicknesses of the multiple groups of sub-plug blocks 21 are different. The multiple groups of sub-plug blocks 21 are provided with third bundling holes. The insulating tape passes through the third bundling holes and is wrapped and bundled on the outside of the multiple groups of sub-plug blocks 21 to increase the stability of the device. If a component of the plug block 21 is defective, the bundling and fixation of the defective component of the plug block 21 is released, the defective component is withdrawn, and the intact component is replaced. There is no need to replace the entire plug block 21. Therefore, during the replacement process, there is no need to disassemble the upper clamp 1 and the upper iron yoke 2, which shortens the replacement time and improves the replacement efficiency. There is no need to put the device back into the furnace for drying, which greatly reduces the labor intensity of the operator and reduces the repair cost.

[0034] As a specific implementation of the detachable transformer body pressing device provided by the present invention, please refer to Figures 1 to 3 A second insulating block 20 is disposed above the insulating plate 4 . The second insulating block 20 is disposed at the end of the insulating plate 4 and on the inner side of the upper clamp 1 .

[0035] For details, please refer to Figures 1 to 3 The second insulating block 20 is arranged at the end of the insulating plate 4 and on the inner side of the upper clamp 1. A group of second insulating blocks 20 are respectively arranged at the left and right ends of the inner side walls of the two groups of upper clamps 1. The second insulating block 20 is a split structure. The second insulating block 20 is formed by stacking multiple groups of second insulator blocks. The thickness of the multiple groups of second insulator blocks is different. The upper end surface of the second insulator block at the upper end is provided with a second mounting groove matching the fixing piece of the upper clamp 1, which is convenient for installing the upper clamp 1. The second mounting groove includes two groups of second vertical grooves 18 and a group of second transverse grooves. The two groups of second vertical grooves 18 are symmetrically arranged at the left and right ends of the second insulator block at the upper end. The second transverse groove is mounted on the two groups of second vertical grooves 18 near the upper clamp 1 At one end, the second transverse groove is arranged along the edge of the upper end surface of the second insulator block at the uppermost end, and the plurality of groups of second insulator blocks are provided with fourth bundling holes. The insulating tape passes through the fourth bundling hole and is wrapped and bundled on the outside of the plurality of groups of fourth insulator blocks to increase the stability of the device. If a component of the second insulating block 20 is defective, the bundling and fixation of the defective component of the second insulating block 20 is released, the defective component is withdrawn, and the intact component is replaced. There is no need to replace the second insulating block 20 as a whole. Therefore, during the replacement process, there is no need to disassemble the upper clamp 1 and the upper iron yoke 2, which shortens the replacement time and improves the replacement efficiency. There is no need to put the device back into the furnace for drying, which greatly reduces the labor intensity of the operator and reduces the repair cost.

[0036] As a specific implementation of the detachable transformer body pressing device provided by the present invention, please refer to Figures 1 to 3 , the first insulating block 15 is distributed in the middle of the insulating plate 4 .

[0037] For details, please refer to Figures 1 to 3 The first insulating block 15 is distributed between the second insulating blocks 20 at the left and right ends and is arranged on the outside of the upper clamp 1 . The width of the first insulating block 15 is greater than the width of the second insulating block 20 .

[0038] Please refer to Figures 1 to 10 A specific implementation method of a replacement method of a detachable transformer body pressing device provided by the present invention is now described, using a detachable transformer body pressing device as described in any of the above items, including the following operating steps: S1. Remove the lead wires from transformer coil 1; S2, cancel the compression of coil 1; S3. Unlock the defective part of the defective component, remove the defective part of the defective component and replace it. The part without defect does not need to be replaced. After the replacement is completed, re-lock the parts of the defective component; S4, reassemble the coil 1 into the oil tank and install the bushing lead; S5, filling the oil tank; S6. Repeat the test.

[0039] The above are only preferred embodiments of the present invention and are 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.

Claims

1. A disassembly type transformer body pressing device, characterized in that: It includes an insulating plate, a first insulating block and an upper clamp, wherein the insulating plate is arranged at the upper end of the coil, the insulating plate includes multiple groups of spliced ​​side sub-insulating plates and a middle sub-insulating plate, the first insulating block is arranged above the insulating plate, the first insulating block includes multiple groups of stacked blocks arranged on the first insulating block, the upper clamp is arranged above the first insulating block, and two groups of the upper clamps are respectively arranged on the front and rear sides of the upper iron yoke.

2. A detachable transformer body pressing device as claimed in claim 1, characterized in that: A plurality of groups of insulating pads are arranged below the insulating plate, and the insulating pads are arranged corresponding to the pads at the upper ends of the coils.

3. A detachable transformer body pressing device as claimed in claim 1, characterized in that: The insulating plate is in a circular ring shape, and includes two groups of side sub-insulating plates and two groups of middle sub-insulating plates. The two groups of side sub-insulating plates are arranged opposite to each other, and the two groups of middle sub-insulating plates are arranged opposite to each other, and the middle sub-insulating plate is arranged between the ends of the same side of the two groups of side sub-insulating plates.

4. A detachable transformer body pressing device as claimed in claim 1, characterized in that: A pressing plate is arranged above the insulating plate, and the pressing plate comprises a plurality of groups of spliced ​​side sub-pressing plates and a middle sub-pressing plate.

5. A detachable transformer body pressing device as claimed in claim 4, characterized in that: The pressure plate is in the shape of a circular ring, and includes two groups of side sub-pressure plates and two groups of middle sub-pressure plates. The two groups of side sub-pressure plates are arranged opposite to each other, and the two groups of middle sub-pressure plates are arranged opposite to each other, and the middle sub-pressure plate is arranged between the ends on the same side of the two groups of side sub-pressure plates.

6. A detachable transformer body pressing device as claimed in claim 5, characterized in that: The end of the side sub-pressing plate is provided with a first assembling piece, and the end of the middle sub-pressing plate is provided with a second assembling piece, and the first assembling piece and the second assembling piece match each other.

7. A detachable transformer body pressing device as claimed in claim 1, characterized in that: A plurality of groups of plugs are arranged above the insulating plate, and the plugs are arranged below the upper iron yoke.

8. A detachable transformer body pressing device as claimed in claim 1, characterized in that: A second insulating block is arranged above the insulating plate. The second insulating block is arranged at an end of the insulating plate and at an inner side of the upper clamp.

9. A detachable transformer body pressing device as claimed in claim 1, characterized in that: The first insulating block is distributed in the middle of the insulating plate.

10. A method for replacing a detachable transformer body pressing device, characterized in that: The disassembly type transformer body pressing device as claimed in any one of claims 1 to 9 is used, comprising the following operating steps: S1, remove the lead; S2, cancel the compaction; S3, remove and replace the defective part of the defective component; S4. Assemble the oil tank and casing; S5, oil filling; S6. Repeat the test.

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