A dismounting device for the high voltage bushing top hat of a transformer

Abstract

The application discloses a dismounting device for a general cap of a high-voltage bushing of a transformer, which comprises a base assembly, a general cap dismounting assembly and an adjusting assembly. The base assembly comprises a rubber pad stripping piece. The rubber pad stripping piece comprises a guide pipe fastened on a hoop, a wedge-shaped block arranged in an internal slide way of the guide pipe and a first adjusting bolt screwed to one end of the guide pipe. By screwing the first adjusting bolt, the top of the first adjusting bolt connected with the wedge-shaped block is moved to abut against the wedge-shaped block at the center of the guide pipe, so that the rubber pad adhered to the bottom of the general cap is separated from the flange surface of the oil pillow of the bushing. The adjusting assembly comprises a first linkage block, a guide nut, an abutting piece, a first connecting piece, a second connecting piece, a second linkage block and a second adjusting bolt. The dismounting device for the general cap of the high-voltage bushing of the transformer can quickly remove the general cap for defect elimination or replacement, and can improve the operation safety factor and efficiency. The structure is simple, and the device is easy to maintain and repair.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of auxiliary tools for transformer substations, and in particular to a device for dismounting a general cap of a high-voltage bushing of a transformer. BACKGROUND

[0002] In the prior art, the dismounting of the general cap is difficult and requires high strength, which is a problem that plagues maintenance personnel during the overhaul and defect treatment of the high-voltage bushing of the transformer.

[0003] In addition, the high-voltage bushing has a large current-carrying capacity and generates a lot of heat, and the pine-rubber gasket between the general cap and the bushing oil pillow is prone to melting and has high viscosity. The traditional dismounting method uses heavy dismounting tools, has high dismounting damage, takes a long time, has great safety hazards, and is prone to damage to the sealing gasket and the sealing surface during the dismounting process. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a device for dismounting a general cap of a high-voltage bushing of a transformer, which can quickly remove the general cap for defect elimination or replacement treatment, and improve the operation safety factor and efficiency; the structure is simple, and easy to maintain and maintain.

[0005] To solve the above technical problems, the present application provides a device for dismounting a general cap of a high-voltage bushing of a transformer, comprising: a base assembly for detachable fastening on the bushing oil pillow, a general cap dismounting assembly for clamping and dismounting the general cap terminal post, and an adjusting assembly for adjusting the relative position of the general cap dismounting assembly and the general cap terminal post. One end of the adjusting assembly is connected to the base assembly, and the opposite end of the adjusting assembly is connected to the general cap dismounting assembly. The base assembly comprises two clamps capable of adjusting the relative position and a plurality of gasket stripping pieces for separating the gasket adhered to the bottom of the general cap from the flange surface of the bushing oil pillow. The gasket stripping piece comprises a guide tube fastened on the clamp, a wedge block installed in the internal slide of the guide tube, and a first adjusting bolt screwed to one end of the guide tube. By screwing the first adjusting bolt, the top of the first adjusting bolt connected to the wedge block moves to the center of the guide tube, and the gasket adhered to the bottom of the general cap is separated from the flange surface of the bushing oil pillow. The adjusting assembly comprises a first linkage block that can move up and down along the support seat of the clamp, a guide nut fastened on the clamp, an abutting piece connected to the bottom of the first linkage block, a first connecting piece connected to the top of the first linkage block, a second connecting piece connected to the first connecting piece, a second linkage block sleeved in the second connecting piece, and a second adjusting bolt. The end of the second adjusting bolt is installed in the abutting piece and guided by the guide nut. By screwing the second adjusting bolt, the first linkage block moves up and down along the clamp. The first linkage block, the first connecting piece, and the second connecting piece are connected in sequence. The position of the second linkage block in the second connecting piece is adjusted to adjust the operating center of the general cap dismounting assembly.

[0006] The wedge-shaped block tail is provided with a pin, and the rubber pad stripping piece further comprises a first spring, the opposite ends of the first spring abutting against the pin and the side wall of the hoop respectively, wherein the first spring is reset by abutting against the pin to link the wedge-shaped block to move linearly along the guide tube.

[0007] The guide tube is provided with a guide groove for guiding the pin, and the end of the guide tube is provided with a guide nut, and the first adjusting bolt is connected with the guide nut.

[0008] The first connecting piece and the first linkage block are fixed by a first fastening screw, and the second connecting piece and the second linkage block are fixed by a second fastening screw, and the moving direction of the second linkage block along the second connecting piece is perpendicular to the moving direction of the first linkage block along the hoop.

[0009] The rubber pad stripping piece is arranged uniformly in four.

[0010] The general cap dismounting assembly comprises a circular column, a hexagonal head and a linkage column sleeved in the circular column and connected as a whole, a first hoop connected to the linkage column, and a second hoop detachably connected to the first hoop, wherein one end of the circular column is fastened with the adjusting assembly, the hexagonal head and the linkage column sleeved with a second spring and a plane thrust ball bearing are connected as a whole, and the hexagonal head abuts against the second spring and the plane thrust ball bearing on the circular column, wherein the general cap binding post is clamped by the first hoop and the second hoop, and the general cap is dismounted by screwing the hexagonal head and the linkage column.

[0011] The general cap dismounting assembly further comprises a first connecting seat fastened to the hexagonal head and a second connecting seat fastened to the circular column, a magnet is arranged on the first connecting seat, and an electronic counter and a magnetic induction sensor are arranged on the second connecting seat respectively, wherein the magnet is arranged opposite to the magnetic induction sensor, the magnet rotates with the first connecting seat and triggers the magnetic induction sensor, and the counting data of the magnetic induction sensor is displayed on the electronic counter.

[0012] The magnet is connected with an adjusting screw, the adjusting screw is arranged on the first connecting seat, a connecting nut is arranged on the second connecting seat, and the magnetic induction sensor is connected with the connecting nut, wherein the magnet and the magnetic induction sensor satisfy a distance of 0-20mm by adjusting the adjusting screw.

[0013] The first hoop and the second hoop are provided with a fastening screw therebetween.

[0014] The two hoops are adjusted and fixed by a third fastening screw.

[0015] The device for dismounting the high-voltage bushing general cap of a transformer has the following beneficial effects: the device for dismounting the high-voltage bushing general cap of a transformer comprises a base assembly, a general cap dismounting assembly and an adjusting assembly, the base assembly comprises a rubber pad stripping piece, the rubber pad stripping piece comprises a guide pipe fastened on a hoop, a wedge-shaped block arranged in an inner slide of the guide pipe and a first adjusting bolt screwed to one end of the guide pipe, the first adjusting bolt is screwed to make the top of the first adjusting bolt in linkage move against the wedge-shaped block at the center position of the guide pipe, and the rubber pad adhered to the bottom of the general cap is separated from the flange surface of the bushing oil pillow; the adjusting assembly comprises a first linkage block, a guide nut, an abutting piece, a first connecting piece, a second connecting piece, a second linkage block and a second adjusting bolt, wherein the end of the second adjusting bolt is arranged in the abutting piece and guided by the guide nut, the second adjusting bolt is screwed to drive the first linkage block to move up and down along the hoop reciprocally, and the first linkage block, the first connecting piece and the second connecting piece are in linkage in sequence; the position of the second linkage block in the second connecting piece is adjusted to make the position of the operation center of the general cap dismounting assembly in linkage, the general cap can be quickly taken off for defect elimination or replacement, the operation safety factor and efficiency are improved, the structure is simple, and the device is easy to maintain and repair. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0017] Figure 1 The figure is a structure schematic view of the device for dismounting the high-voltage bushing general cap of a transformer from the first perspective of the embodiment of the present application.

[0018] Figure 2 The figure is a structure schematic view of the device for dismounting the high-voltage bushing general cap of a transformer from the second perspective of the embodiment of the present application.

[0019] Figure 3 The figure is a structure schematic view of the device for dismounting the high-voltage bushing general cap of a transformer from the third perspective of the embodiment of the present application.

[0020] Figure 4 The figure is a structure schematic view of the device for dismounting the high-voltage bushing general cap of a transformer from the fourth perspective of the embodiment of the present application. DETAILED DESCRIPTION

[0021] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0022] As shown in Figures 1-4 Figure 1 is an embodiment one of the dismounting device for the general cap of the high-voltage bushing of the transformer according to the present application.

[0023] The dismounting device for the general cap of the high-voltage bushing of the transformer in the embodiment comprises a base assembly to be detachably fastened on the oil pillow of the bushing, a general cap dismounting assembly to clamp and dismount the terminal post of the general cap, and an adjusting assembly to adjust the relative position of the general cap dismounting assembly and the terminal post of the general cap. One end of the adjusting assembly is connected with the base assembly, and the opposite end of the adjusting assembly is connected with the general cap dismounting assembly.

[0024] The base assembly comprises two clamps 7 capable of adjusting the relative position and a plurality of adhesive pad stripping pieces to separate the adhesive pad adhered to the bottom of the general cap from the flange surface of the oil pillow of the bushing. The adhesive pad stripping piece comprises a guide tube 3 fastened on the clamp 7, a wedge block 32 arranged in the inner slide of the guide tube 3, and a first adjusting bolt 1 screwed at one end of the guide tube 3. By screwing the first adjusting bolt 1, the top of the first adjusting bolt 1 connected in linkage moves to abut against the wedge block 32 at the center position of the guide tube 3, so as to separate the adhesive pad adhered to the bottom of the general cap from the flange surface of the oil pillow of the bushing.

[0025] The adjusting assembly comprises a first linkage block 27 capable of reciprocating up and down on the support seat 28 of the clamp 7, a guide nut 30 fastened on the clamp 7, an abutting piece 31 connected at the bottom of the first linkage block 27, a first connecting piece 26 connected at the top of the first linkage block 27, a second connecting piece 23 connected with the first connecting piece 26, a second linkage block 24 sleeved in the second connecting piece 23, and a second adjusting bolt 29.

[0026] The end of the second adjusting bolt 29 is arranged in the abutting piece 31 and guided by the guide nut 30. By screwing the second adjusting bolt 29, the first linkage block 27 is driven to reciprocate up and down along the clamp 7. The first linkage block 27, the first connecting piece 26, and the second connecting piece 23 are in linkage in sequence.

[0027] The position of the second linkage block 24 in the second connecting piece 23 is adjusted to link and adjust the position of the operation center of the general cap dismounting assembly.

[0028] In implementation, the hoop 7 is provided with two pieces, which are fastened on the casing oil pillow through four third fastening screws 5 respectively. Before fastening, the position needs to be adjusted to ensure that the four wedge-shaped blocks 32 move towards the center of the circle to avoid the casing oil pillow flange screws, and the bottom plane of the four wedge-shaped blocks 32 is tightly attached to the casing oil pillow flange. Then, the first adjusting bolt 1 is screwed clockwise, so that the first adjusting bolt 1 moves towards the center of the circle under the cooperation of the guide nut 2, and the top of the first adjusting bolt 1 abuts against the wedge-shaped block 32 to move towards the center of the circle. Under the balanced force of the four wedge-shaped blocks 32, the pine wood rubber pad adhered to the bottom flange of the general hat is separated from the oil pillow flange, so that the general hat is detached.

[0029] Further, the tail of the wedge-shaped block 32 is provided with a pin 33, and the rubber pad stripping piece further comprises a first spring 4, the opposite ends of the first spring 4 abutting against the pin 33 and the side wall of the hoop 7 respectively, wherein the first spring 4 is reset by abutting against the pin 33 to link the wedge-shaped block 32 to move linearly along the guide pipe 3.

[0030] Among them, the guide pipe 3 is provided with a guide groove 6 for guiding the pin 33; the end of the guide pipe 3 is provided with a guide nut 2, and the first adjusting bolt 1 is adaptively connected with the guide nut 2.

[0031] In implementation, the first adjusting bolt 1 is loosened counterclockwise. Since the tail of the wedge-shaped block 32 is provided with a pin 33, under the rebounding force of the first spring 4, the pin 33 moves linearly along the guide groove 6 to drive the wedge-shaped block 32 to move linearly in the guide pipe 3, and finally returns to the initial state. It should be noted that the cross-sectional dimension of the wedge-shaped block 32 is highly matched with the inner cavity dimension of the guide pipe 3, and the gap is small, so as to avoid the wedge-shaped block 32 from moving towards the center of the circle and causing force deviation.

[0032] Preferably, the rubber pad stripping piece is provided with four pieces arranged uniformly.

[0033] In implementation, after the rubber ring on the flange of the casing general hat is separated, the second adjusting bolt 29 is rotated, the screw passes through the abutting piece 31 to cooperate with the guide nut 30, drives the first linkage block 27 to move up and down through the support seat 28, and the two first fastening screws 25 fix the first connecting piece 26 and the first linkage block 27, so as to drive the first connecting piece 26 and the second connecting piece 23 to move up and down synchronously. The second linkage block 24 penetrates through the second connecting piece 23, and the cooperation gap is small, which mainly adjusts the center overlap of the rotating part linkage column 19 and the general hat terminal post. Then, the second fastening screw 22 is fastened.

[0034] Preferably, the moving direction of the second linkage block 24 along the second connecting piece 23 is perpendicular to the moving direction of the first linkage block 27 along the hoop 7.

[0035] Further, the cap dismounting assembly comprises: a circular column 18; a hexagonal head 8 and a linkage column 19 sleeved in the circular column 18 and integrated; a first clamp 34 connected to the linkage column 19; and a second clamp 20 detachably connected in the first clamp 34, wherein: one end of the circular column 18 is fastened with the adjusting assembly, the hexagonal head 8 and the linkage column 19 are sleeved with a second spring 15 and a flat thrust ball bearing 16, and the hexagonal head 8 abuts against the second spring 15 and the flat thrust ball bearing 16 on the circular column 18, wherein: the cap terminal is clamped by the first clamp 34 and the second clamp 20, and the cap is dismounted by screwing the hexagonal head 8 and the linkage column 19.

[0036] The second spring 15 functions to buffer, in addition to signaling the dismounting of the cap, because the bushing lead-out wire threaded column of the cap is made of two copper materials, and without the spring buffer, the cap is easily damaged under mechanical stress when rotated, and the inner thread of the cap and the bushing lead-out wire threaded column are easily damaged, which increases the gap between the threads after reassembly, and the gap discharge easily causes heating.

[0037] Further, the cap dismounting assembly further comprises: a first connecting seat 10 fastened on the hexagonal head 8 and a second connecting seat 17 fastened on the circular column 18, the first connecting seat 10 is provided with a magnet 11, and the second connecting seat 17 is respectively provided with an electronic counter 14 and a magnetic induction sensor 12, wherein: the magnet 11 is oppositely arranged with the magnetic induction sensor 12, the magnet 11 rotates with the first connecting seat 10 and triggers the magnetic induction sensor 12, and the counting data of the magnetic induction sensor 12 is displayed on the electronic counter 14.

[0038] The magnet 11 is connected with an adjusting screw 9, the adjusting screw 9 is arranged on the first connecting seat 10, the second connecting seat 17 is provided with a connecting nut 13, and the magnetic induction sensor 12 is adaptively connected with the connecting nut 13, wherein: the magnet 11 and the magnetic induction sensor 12 satisfy a distance of 0-20mm by adjusting the adjusting screw 9.

[0039] Preferably, a fastening screw 21 is arranged between the first clamp 34 and the second clamp 20.

[0040] In the implementation, the circular column 18 is welded on the second linkage block 24, the hexagonal head 8 is integrated with the linkage column 19, and the linkage column 19 penetrates the second spring 15, the plane thrust ball bearing 16, the circular column 18 and the first clamp 34 from top to bottom. In addition, the first connecting seat 10 is welded on the linkage column 19. The second connecting seat 17 is welded on the circular column 18. The adjusting screw 9 is installed on the first connecting seat 10, and the magnet 11 at the top end of the adjusting screw 9 changes the gap between the magnet 11 and the magnetic induction sensor 12 by rotating the adjusting screw 9. When the linkage column 19 and the center of the general cap are overlapped, the four fastening screws 21 are tightened to make the second clamp 20 and the first clamp 34 clamp the general cap terminal post, and then the second adjusting bolt 29 is adjusted so that the entire general cap is lifted. Under the action of gravity of the general cap, the second spring 15 will be compressed, that is, the distance between the first connecting seat 10 and the second connecting seat 17 will be reduced, so the adjusting screw 9 needs to be adjusted to make the distance between the adjusting screw 9 and the sensor within the specified range.

[0041] The magnetic induction sensor 12 is fixed on the second connecting seat 17 by the connecting nut 13, and the electronic counter 14 is installed on the second connecting seat 17. When the general cap rotates one circle, the magnet 11 also rotates one circle with the first connecting seat 10 to trigger the magnetic induction sensor 12 to count one time and display on the electronic counter 14. The plane thrust ball bearing 16 reduces the friction between the second spring 15 and the circular column 18.

[0042] In the embodiment, the device for disassembling the general cap of the transformer high-voltage bushing is used. In the specific implementation, first, the two clamps 7 are fastened on the bushing oil pillow by the four third fastening screws 5. Before fastening, the position needs to be adjusted to ensure that the four wedge-shaped blocks 32 avoid the flange screws of the bushing oil pillow in the direction of moving to the center, and the bottom plane of the four wedge-shaped blocks 32 is tightly attached to the flange surface of the bushing oil pillow.

[0043] Then, the four first adjusting bolts 1 are screwed clockwise to make the first adjusting bolts 1 move to the center under the cooperation of the guide nuts 2. The top of the first adjusting bolts 1 is pressed against the wedge-shaped blocks 32 in the center of the guide pipe 3 to move to the center. Under the balanced force of the four wedge-shaped blocks 32, the adhesive pad adhered to the bottom flange of the general cap is separated from the flange surface of the oil pillow, so that the general cap is separated. Then, the first adjusting bolts 1 are loosened counterclockwise. Under the rebound force of the first spring 4, the pin 33 moves linearly along the guide groove 6 to drive the wedge-shaped blocks 32 to return to the initial state.

[0044] Further, screw the second adjusting bolt 29, adjust the height of the second clamp 20 and the first clamp 34, adjust the second linkage block 24, make the second clamp 20 and the first clamp 34 concentric with the general post, fasten the two second fastening screws 22 to fix the second linkage block 24, and fasten the four fastening screws 21 to clamp the general hat post. Then, screw the second adjusting bolt 29 to make the distance between the general hat flange surface and the oil pillow top flange surface 2-3mm, at this time the second spring 15 is compressed, adjust the adjusting screw 9 to make the magnet 11 and the magnetic induction sensor 12 meet the distance of 0-20mm, then rotate the hexagonal head 8 counterclockwise for many turns until the second spring 15 is suddenly released, the general hat is detached, and the number on the electronic counter 14 is read. In other embodiments, after loosening the four fastening screws 21, the general hat is removed for defect elimination or replacement, and the reverse process is followed when reinstalling.

[0045] The device for disassembling the general hat of the transformer high-voltage bushing has the following beneficial effects: the device for disassembling the general hat of the transformer high-voltage bushing comprises a base assembly, a general hat disassembly assembly, and an adjusting assembly. The base assembly comprises a rubber pad stripping piece, a guide tube fastened on a clamp, a wedge-shaped block arranged in an internal slide of the guide tube, and a first adjusting bolt screwed to one end of the guide tube. By screwing the first adjusting bolt, the top of the linkage first adjusting bolt is moved to abut against the wedge-shaped block at the center of the guide tube, and the rubber pad adhered to the bottom of the general hat is separated from the flange surface of the bushing oil pillow. The adjusting assembly comprises a first linkage block, a guide nut, an abutment piece, a first connecting piece, a second connecting piece, a second linkage block, and a second adjusting bolt. The end of the second adjusting bolt is arranged in the abutment piece and guided by the guide nut. By screwing the second adjusting bolt, the first linkage block is moved up and down along the clamp reciprocally. The first linkage block, the first connecting piece, and the second connecting piece are linked in sequence. By adjusting the position of the second linkage block in the second connecting piece, the position of the operation center of the general hat disassembly assembly is linked and adjusted, the general hat can be quickly removed for defect elimination or replacement, the operation safety factor and efficiency are improved, the structure is simple, and the device is easy to maintain and repair.

Claims

1. A device for dismounting a high voltage bushing crown of a transformer, characterized in that, The application relates to a base assembly for detachable fastening on a casing oil pillow, a top-hat dismounting assembly for clamping and dismounting a top-hat terminal, and an adjusting assembly for adjusting the relative position of the top-hat dismounting assembly and the top-hat terminal, one end of the adjusting assembly being connected with the base assembly, and the other end being connected with the top-hat dismounting assembly. The base assembly comprises two relative-position-adjustable clamps (7) and a plurality of adhesive pad stripping pieces for separating the adhesive pad at the bottom of the top-hat terminal from the flange surface of the casing oil pillow. The adhesive pad stripping piece comprises a guide tube (3) fastened on the clamp (7), a wedge-shaped block (32) arranged in the inner slide of the guide tube (3), and a first adjusting bolt (1) screwed on one end of the guide tube (3), the top of the first adjusting bolt (1) being connected with the wedge-shaped block (32) in the central position of the guide tube (3) and moving against the wedge-shaped block (32) when the first adjusting bolt (1) is screwed, so as to separate the adhesive pad at the bottom of the top-hat terminal from the flange surface of the casing oil pillow. The adjusting assembly comprises a first linkage block (27) reciprocatingly moving up and down on the supporting seat (28) of the clamp (7), a guide nut (30) fastened on the clamp (7), an abutting piece (31) connected with the bottom of the first linkage block (27), a first connecting piece (26) connected with the top of the first linkage block (27), a second connecting piece (23) connected with the first connecting piece (26), a second linkage block (24) sleeved in the second connecting piece (23), and a second adjusting bolt (29), wherein the end of the second adjusting bolt (29) is arranged in the abutting piece (31) and guided by the guide nut (30), the first linkage block (27), the first connecting piece (26) and the second connecting piece (23) are sequentially connected, the second adjusting bolt (29) is screwed to drive the first linkage block (27) to reciprocatingly move up and down on the clamp (7), and the position of the operation center of the top-hat dismounting assembly is adjusted by adjusting the position of the second linkage block (24) in the second connecting piece (23). The tail of the wedge-shaped block (32) is transversely provided with a pin (33), the adhesive pad stripping piece further comprises a first spring (4), and the opposite ends of the first spring (4) are respectively abutted against the pin (33) and the side wall of the clamp (7), wherein the first spring (4) is reset by abutting against the pin (33) to drive the wedge-shaped block (32) to linearly move along the guide tube (3). A guide groove (6) for guiding the pin (33) is arranged on the guide tube (3). The end of the guide tube (3) is provided with a guide nut (2), and the first adjusting bolt (1) is adaptively connected with the guide nut (2).

2. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 1, characterized in that, ​ ​ 3. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 2, characterized in that, ​ ​ 4. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 1, characterized in that, The first linkage block (27) and the first connecting piece (26) are fixed by a first fastening screw (25), and the second connecting piece (23) and the second linkage block (24) are fixed by a second fastening screw (22). The second linkage block (24) is perpendicular to the first linkage block (27) along the moving direction of the hoop (7) along the moving direction of the second connecting piece (23).

5. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 1, characterized in that, The rubber pad stripping piece is arranged uniformly in four.

6. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 1, characterized in that, The general cap disassembly assembly comprises: A circular column (18); A hexagonal head (8) and a linkage column (19) sleeved in the circular column (18) and connected as a whole; A first hoop (34) connected to the linkage column (19); and A second hoop (20) detachably connected in the first hoop (34), wherein: one end of the circular column (18) is fastened with an adjusting assembly, the hexagonal head (8) and the linkage column (19) connected as a whole are sleeved with a second spring (15) and a plane thrust ball bearing (16), and the hexagonal head (8) abuts against the second spring (15) and the plane thrust ball bearing (16) on the circular column (18), wherein: The general cap terminal post is clamped by the first hoop (34) and the second hoop (20), and the general cap is disassembled by rotating the hexagonal head (8) and the linkage column (19).

7. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 6, characterized in that, The general cap disassembly assembly further comprises: a first connecting seat (10) fastened on the hexagonal head (8) and a second connecting seat (17) fastened on the circular column (18), the first connecting seat (10) is provided with a magnet (11), and the second connecting seat (17) is respectively provided with an electronic counter (14) and a magnetic induction sensor (12), wherein: The magnet (11) is arranged opposite to the magnetic induction sensor (12), the magnet (11) rotates with the first connecting seat (10) and triggers the counting data of the magnetic induction sensor (12) to be displayed on the electronic counter (14).

8. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 7, characterized in that, The magnet (11) is connected with an adjusting screw (9), the adjusting screw (9) is arranged on the first connecting seat (10), the second connecting seat (17) is provided with a connecting nut (13), and the magnetic induction sensor (12) is adaptively connected with the connecting nut (13), wherein: The magnet (11) and the magnetic induction sensor (12) satisfy a distance of 0-20mm through the adjusting screw (9).

9. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 6, characterized in that, The first hoop (34) and the second hoop (20) are provided with a fastening screw (21).

10. The device for dismounting the general hat of the high voltage bushing of a transformer according to claim 1, characterized in that, The two hoops (7) are adjusted and fixed by a third fastening screw (5).

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