Polishing and chamfering device for insulating cushion block for transformer

Abstract

The invention relates to the field of chamfering, and discloses a transformer insulation cushion block polishing and chamfering device which comprises a shell, a base is fixedly arranged in the middle of the interior of the shell and used for mounting related assemblies for machining, two mounting plates are fixedly arranged at the upper end of the base, and the two mounting plates are symmetrically arranged along the center line of the base; a clamp assembly is arranged at the upper end of one side of the mounting plate and used for clamping an insulating cushion block, a limiting assembly is arranged below the clamp assembly, the limiting assembly is connected with the mounting plate and used for correcting the position of the insulating cushion block after the insulating cushion block enters the mounting plate, and a pushing assembly is arranged on one side of the limiting assembly and used for pushing the insulating cushion block into the mounting plate. The polishing and chamfering device for the insulating cushion block for the transformer is provided with the limiting assembly and the material pushing assembly, the limiting assembly can prevent the position of the cushion block from deviating, a brush can also conduct cleaning, and then the material pushing assembly can suck and discharge chippings to a designated position while discharging is conducted.

Description

Technical Field

[0001] The invention relates to the technical field of chamfering, in particular to a device for grinding and chamfering an insulating spacer for a transformer. Background Art

[0002] The pad is an insulating component material made of single-layer or multi-layer insulating cardboard pressed layer by layer with adhesive, and processed by slitting, grinding, chamfering and other processes. It is widely used in transformer windings, cores, oil tanks and other structural parts. The pad as an insulating material can isolate the electromagnetic wire of the transformer and play the role of oil conduction and heat dissipation. In addition, the pad also plays the role of insulation, support and fixation in the transformer.

[0003] The top corners and surroundings of the two ends of the slitting pads need to be chamfered and polished due to the thorns or flash produced by machining. This is to eliminate the adverse effects such as charge accumulation caused by the sharp corners and burrs of the pads during the operation of the transformer, and even the formation of bridges by the burrs that fall off, leading to partial discharge breakdown. Ensure that the pads can stably play an insulating role during the operation of the transformer and effectively improve the insulation reliability of the transformer. Under the guidance of the existing small gap multi-oil channel insulation theory, the insulating pads are getting smaller and smaller, and the requirements for the chamfers of the pads are getting higher and higher.

[0004] The existing technology mainly relies on manual chamfering. When using a chamfering tool to grind and chamfer the pad, the worker needs to constantly push the pad by hand to move it so that the pad contacts the chamfering blade. This is time-consuming and labor-intensive to use, with low efficiency, and the chamfering accuracy is not high. The quality reliability of each pad cannot be guaranteed, and all small burrs cannot be effectively removed, which affects the insulation performance of the pad.

[0005] Therefore, a pad chamfering device is developed to perform direct mechanical chamfering processing, which is easy to operate and can effectively improve the processing efficiency, precision and quality of the pad, and ensure the safety and stability of the pad during application.

[0006] In the patent application with application announcement number CN117798992A, it includes a chamfering mechanism, which includes a chamfering box, the top inner ring of the chamfering box is fixedly plugged with a first inclined plate and a second inclined plate, and the bottoms of the first inclined plate and the second inclined plate are fixedly connected, the top of the first inclined plate is provided with a slide slot, the top of the second inclined plate is provided with a pouring port, the bottom of the second inclined plate is fixedly installed with a chamfering device body, the top of the chamfering device body passes through the second inclined plate, and a chamfering blade is fixedly installed. The advantages are: in the present invention, the pad can be not only automatically clamped by the moving component and the clamping component, but also automatically pushed to move the pad, reducing the labor of workers and saving time and effort in use.

[0007] In the prior art including the above-mentioned patents, when processing insulating gaskets, only rectangular gaskets can be clamped and chamfered. If the bottom edge of a columnar insulating gasket needs to be chamfered, the processing equipment can only be replaced. This not only increases the cost required for production, but also the debris on the surface of the fixture cannot be completely sucked away by the fan, which makes it difficult to ensure the cleanliness of the working environment and the normal operation of the fixture. Summary of the invention

[0008] The problem to be solved by the present invention is that it is not convenient to adapt to insulating spacers of different shapes, and it is not convenient to clean the inner space of the device.

[0009] In order to solve the above technical problems, the technical solution of the present invention is: a device for grinding and chamfering insulating pads for transformers, comprising a shell, a base is fixedly arranged in the middle of the inner part of the shell, the base is used to install related components for processing, a mounting plate is fixedly arranged on the upper end of the base, two mounting plates are symmetrically arranged along the center line of the base, a clamp assembly is arranged on the upper end of one side of the mounting plate, the clamp assembly is used to clamp the insulating pad, a limiting assembly is arranged below the clamp assembly, the limiting assembly is connected to the mounting plate, the limiting assembly is used to correct the position of the insulating pad after it enters, a pushing assembly is arranged on one side of the limiting assembly, the pushing assembly is used to push out the processed insulating pad, and the pushing assembly is connected to the mounting plate.

[0010] Preferably, the clamp assembly comprises a hydraulic module 1, the hydraulic module 1 is fixedly connected to the mounting plate, a mounting block is fixedly provided at the lower end of the hydraulic module 1, and a base is fixedly provided at the lower end of the mounting block by screws.

[0011] Preferably, the base is arranged in an inverted trapezoid, a pressure strip is slidingly arranged in the middle inner part of the base, a pressure block made of rubber is arranged at the lower end of the pressure strip, a spring is fixedly arranged above the pressure block and located inside the pressure strip, limiting blocks are arranged on both sides of the pressure block, a telescopic plate is fixedly arranged on the side of the limit block away from the pressure block, spring plates are arranged between the telescopic plates, an air chamber is fixedly arranged on one side of the pressure strip and located at the upper end of the base, and a valve core is fixedly arranged on the upper end of one side of the air chamber.

[0012] Preferably, a movable plate is slidably provided inside the air chamber, and sealing strips are fixedly provided on the edges where the movable plate contacts the inner wall of the air chamber. Air holes are provided on both sides of the lower end of the air chamber, and the air holes are used to balance the internal and external air pressures of the air chamber. A piston tube 1 is provided on the side of the air chamber close to the pressure strip, and the upper end of the piston tube 1 is connected to the air chamber through a bent pipe. A piston rod 1 is slidably provided inside the piston tube 1, and the lower end of the piston rod 1 is fixedly connected to one end of the pressure strip.

[0013] Preferably, the limiting assembly comprises a hydraulic module 2, the hydraulic module 2 is located directly below the hydraulic module 1, and a guide block is fixedly provided on the upper end of the hydraulic module 2.

[0014] Preferably, a mounting shaft is rotatably arranged inside a side of the guide block close to the mounting plate, a torsion spring is arranged inside the mounting shaft for controlling the outward rotation of the mounting shaft, a brush is fixedly arranged at one end of the mounting shaft, the brush is located between two pressure strips, and the number of the brushes corresponds to the pressure strips.

[0015] Preferably, a rotating plate is rotatably arranged at the lower end of the guide block, which is located just below the mounting shaft. A torsion spring for controlling the opening of the rotating plate is also arranged inside the connection between the rotating plate and the guide block.

[0016] Preferably, the pushing assembly includes hydraulic module three, which is located on one side of the middle of hydraulic module one and hydraulic module two, and is fixedly connected to the mounting plate. A pushing plate is fixedly provided on one side of hydraulic module three close to hydraulic module one.

[0017] Preferably, a piston tube 2 is fixedly provided on the side of the lower end of the push plate close to the hydraulic module 3, a piston rod 2 is slidably provided inside the piston tube 2, one end of the piston rod 2 is fixedly connected to the hydraulic module 3, and a bracket is fixedly provided on the end of the piston tube 2 close to the push plate.

[0018] Preferably, a sliding rod is slidably provided inside the bracket, a sealing block is fixedly provided at the other end of the sliding rod, the sealing block is slidably connected to the push plate, a dust collecting chamber is opened on one side of the sealing block through the push plate, an air pipe is opened on one side of the dust collecting chamber through the push plate, and the height of the air pipe is flush with the opening on the mounting plate.

[0019] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) Through the setting of the limit assembly and the push assembly, firstly, the limit assembly can prevent the pad from being offset when entering, forcing the pad to move to the appropriate position, so as to ensure the processing accuracy and yield rate, and the pad and the pressure strip can be cleaned with a brush when the pad enters, so as to ensure the cleanliness of the fixture assembly. Secondly, the push assembly can suck in the debris remaining in the processing area of ​​the mounting plate while pushing out the pad and discharge it to the designated position when the return assembly is reset, so as to ensure the cleanliness of the processing station, reduce the time for cleaning the inside of the equipment, and avoid a large amount of debris being scattered inside the device; (2) Through the setting of the clamp assembly, the movable range of the pressure strip can be changed by changing the air pressure or air volume in the air chamber. This can improve the adaptability of the clamp while ensuring the clamping effect, so that the clamp can perfectly adapt to rectangular and columnar pads, and some special-shaped pads with simpler shapes can also adapt to their shapes. In this way, when using, you only need to replace the ordinary clamp with the clamp assembly to change the type of pad that the device can process. When encountering pads of different shapes, there is no need to purchase additional processing equipment, which can reduce the purchase cost and the time cost of equipment debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the device of the present invention; Figure 3 It is a schematic diagram of the base and upper structure of the present invention; Figure 4 It is a schematic diagram of the structure of the limit assembly of the present invention; Figure 5 It is a schematic diagram of the pusher assembly of the present invention; Figure 6 For the present invention Figure 5 The enlarged cross-sectional view of the air chamber at A in the middle; Figure 7 It is a schematic diagram of a partial cross-sectional structure of a push plate of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle; Fig. 9 It is a schematic diagram of the structure of the clamp assembly of the present invention; Fig.10 It is a schematic diagram of the structure of the clamp assembly structure (without hydraulic module 1) of the present invention; Fig.11 It is a schematic diagram of the cross-sectional structure of the air chamber of the present invention; Fig.12 This is a schematic diagram of the internal structure of the pressure strip and the piston of the present invention; Fig.13 For the present invention Fig.12 Enlarged structural diagram at point C in the middle.

[0021] In the figure: 1. shell; 2. base; 3. mounting plate; 4. fixture assembly; 401. hydraulic module one; 402. mounting block; 403. base; 404. pressure strip; 405. air chamber; 406. valve core; 407. movable plate; 408. air hole; 409. piston tube one; 410. piston rod one; 411. spring; 412. pressure block; 413. limit block; 414. telescopic plate; 415. spring; 5. limit assembly; 501. hydraulic module two; 502. guide block; 503. mounting shaft; 504. brush; 505. rotating plate; 6. push assembly; 601. hydraulic module three; 602. push plate; 603. piston tube two; 604. piston rod two; 605. bracket; 606. slide rod; 607. sealing block; 608. dust collecting chamber; 609. air pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0023] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "Include" or "comprise" and other similar words used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] like Figures 1 to 13As shown, the present invention provides an insulating pad grinding and chamfering device for a transformer, comprising a shell 1, a base 2 is fixedly arranged in the middle of the inner part of the shell 1, the base 2 is used to install related components for processing, a mounting plate 3 is fixedly arranged on the upper end of the base 2, two mounting plates 3 are symmetrically arranged along the center line of the base 2, a clamp assembly 4 is arranged on the upper end of one side of the mounting plate 3, the clamp assembly 4 is used to clamp the insulating pad, a limit assembly 5 is arranged below the clamp assembly 4, the limit assembly 5 is connected to the mounting plate 3, the limit assembly 5 is used to correct the position of the insulating pad after it enters, a push assembly 6 is arranged on one side of the limit assembly 5, the push assembly 6 is used to push out the processed insulating pad, and the push assembly 6 is connected to the mounting plate 3.

[0025] The clamp assembly 4 includes a hydraulic module 401, which is fixedly connected to the mounting plate 3. A mounting block 402 is fixedly provided at the lower end of the hydraulic module 401, and a base 403 is fixedly provided at the lower end of the mounting block 402 by screws.

[0026] The base 403 is configured as an inverted trapezoid, and a pressure strip 404 is slidably provided in the middle of the base 403. A pressure block 412 made of rubber is provided at the lower end of the pressure strip 404. A spring 411 is fixedly provided inside the pressure strip 404 above the pressure block 412, and limit blocks 413 are provided on both sides of the pressure block 412. A telescopic plate 414 is fixedly provided on the side of the limit block 413 away from the pressure block 412, and spring pieces 415 are provided between the telescopic plates 414. An air chamber 405 is fixedly provided on one side of the pressure strip 404 at the upper end of the base 403, and a valve core 406 is fixedly provided on the upper end of one side of the air chamber 405.

[0027] A movable plate 407 is slidably provided inside the air chamber 405, and sealing strips are fixedly provided on the edges where the movable plate 407 contacts the inner wall of the air chamber 405. Air holes 408 are provided on both sides of the lower end of the air chamber 405, and the air holes 408 are used to balance the internal and external air pressures of the air chamber 405. A piston tube 409 is provided on the side of the air chamber 405 close to the pressure strip 404, and the upper end of the piston tube 409 is connected to the air chamber 405 through a bent pipe. A piston rod 410 is slidably provided inside the piston tube 409, and the lower end of the piston rod 410 is fixedly connected to one end of the pressure strip 404.

[0028] The limiting assembly 5 includes a second hydraulic module 501 . The second hydraulic module 501 is located directly below the first hydraulic module 401 . A guide block 502 is fixedly disposed on the upper end of the second hydraulic module 501 .

[0029] A mounting shaft 503 is rotatably provided inside the guide block 502 close to the mounting plate 3. A torsion spring is provided inside the mounting shaft 503 for controlling the mounting shaft 503 to rotate outward. A brush 504 is fixedly provided at one end of the mounting shaft 503. The brush 504 is located between two pressure strips 404, and the number of the brushes 504 corresponds to the pressure strips 404.

[0030] The lower end of the guide block 502 is located directly below the mounting shaft 503 and is rotatably provided with a rotating plate 505 . A torsion spring for controlling the opening of the rotating plate 505 is also provided inside the connection between the rotating plate 505 and the guide block 502 .

[0031] The pusher assembly 6 includes a hydraulic module three 601, which is located on one side of the middle of the hydraulic module one 401 and the hydraulic module two 501. The hydraulic module three 601 is fixedly connected to the mounting plate 3, and a pusher plate 602 is fixedly provided on one side of the hydraulic module three 601 close to the hydraulic module one 401.

[0032] A piston tube 2 603 is fixedly provided on one side of the lower end of the push plate 602 near the hydraulic module 3 601, a piston rod 2 604 is slidably provided inside the piston tube 2 603, one end of the piston rod 2 604 is fixedly connected to the hydraulic module 3 601, and a bracket 605 is fixedly provided on one end of the piston tube 2 603 near the push plate 602.

[0033] A sliding rod 606 is slidingly arranged inside the bracket 605, and a sealing block 607 is fixedly arranged at the other end of the sliding rod 606. The sealing block 607 is slidably connected to the push plate 602. A dust collecting chamber 608 is opened on one side of the sealing block 607 through the push plate 602. An air pipe 609 is opened on one side of the dust collecting chamber 608 through the push plate 602. The height of the air pipe 609 is flush with the opening on the mounting plate 3.

[0034] The working principle and use process of the present invention: When processing insulating spacers, there are two situations: If the processed cushion block is rectangular, after the cushion block is transported to the right place, the hydraulic module 1 401 pushes the mounting block 402 downward until the pressure strip 404 is pressed on the cushion block. When the pressure strip 404 is pressed tightly, because the air chamber 405 is filled with air, the movable plate 407 is located at the upper end of the air hole 408, and the piston rod 1 410 cannot move upward, so that the rectangular cushion block can be clamped; If the pad to be processed is columnar, it is necessary to control the hydraulic module 401 before processing to make the mounting block 402 move down and press it onto the pad. At this time, the valve core 406 is opened to release the air in the air chamber 405, and it is also necessary to continue to control the hydraulic module 401 to move down until the pressure strip 404 moves up and adapts to the shape of the pad to be processed, and then the valve core 406 is closed to move the hydraulic module 401 up and reset to start processing; during processing, the pressure strip 404 will move up with the downward movement of the mounting block 402, and the piston rod 410 will move up with it when the pressure strip 404 moves up. When the shape of the pressure strip 404 matches the shape of the pad, the movable plate 407 in the air chamber 405 moves to the bottom and the pressure strip 404 cannot move up any further, and the clamping can be completed at this time; it should be noted that the pressure strip 404 in the air chamber 405 After the air is exhausted, the internal air pressure will be reduced. When the pressure strip 404 is reset, most of the internal air enters the piston tube 409. At this time, the movable plate 407 will move up accordingly. When the pressure strip 404 moves up, the air inside the piston tube 409 enters the air chamber 405 and pushes the movable plate 407 down until it touches the bottom. It is worth mentioning that when the pressure strip 404 is pressed on the cushion block, if the hydraulic module 401 works normally, the pressure block 412 will not exceed the limit block 413. If the hydraulic module 401 fails and the pressure is too high, the pressure block 412 will move up. When it exceeds the range of the limit block 413, the limit block 413 moves outward, and the pressure block 412 can rebound quickly under the pulling force of the spring 411. The sound emitted can remind the workers to stop the machine in time to avoid damaging the cushion block. Before the pad enters the processing position, the hydraulic module 2 501 will first push the guide block 502 upwards. During this process, the brush 504 will bounce outwards after losing the limiting effect of the mounting plate 3. When the pad enters the processing position, the curved surface of the guide block 502 can correct the position of the pad, and the brush 504 can clean its surface when the pad enters. Then the guide block 502 continues to move upwards. At this time, the rotating plate 505 loses the limiting effect of the mounting plate 3 and bounces outwards to prevent the pad at the processing position from shifting. Then the pressure strip 404 moves downwards under the action of the hydraulic module 1 401. When the pressure strip 404 passes the brush 504, the debris adsorbed on its surface will be swept down. After clamping, the hydraulic module 2 501 will retract the upper parts and then start the chamfering operation. After the pad processing is completed, the clamp assembly 4 releases the pad, and then the hydraulic module three 601 drives the push plate 602 to move and push the pad out. In the process of the push plate 602 moving forward, the piston tube two 603 moves forward, and the negative pressure generated inside it can suck the debris on one side of the air pipe 609 and temporarily store it in the piston tube two 603. When the push plate 602 is reset, the air inside the piston tube two 603 will first be blown out from the air pipe 609 to further clean the processing area. At the same time, the piston rod two 604 can also push the debris forward into the dust collecting chamber 608. After the push plate 602 is completely reset, the piston rod two 604 can push the sealing block 607 out through the sliding rod 606. At this time, the debris in the dust collecting chamber 608 is discharged to the specified position; it should be noted that the sealing block 607 can be retracted when the push plate 602 contacts the pad.

[0035] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A device for grinding and chamfering insulating spacers for transformers, comprising a housing (1), characterized in that: A base (2) is fixedly arranged in the middle of the inner part of the shell (1), and the base (2) is used to install related components for processing. A mounting plate (3) is fixedly arranged on the upper end of the base (2), and two mounting plates (3) are symmetrically arranged along the center line of the base (2). A clamp assembly (4) is arranged on the upper end of one side of the mounting plate (3), and the clamp assembly (4) is used to clamp the insulating pad. A limit assembly (5) is arranged below the clamp assembly (4), and the limit assembly (5) is connected to the mounting plate (3). The limit assembly (5) is used to correct the position of the insulating pad after it enters. A push assembly (6) is arranged on one side of the limit assembly (5), and the push assembly (6) is used to push out the processed insulating pad. The push assembly (6) is connected to the mounting plate (3).

2. The device for grinding and chamfering insulating spacers for transformers according to claim 1, characterized in that: The clamp assembly (4) comprises a hydraulic module 1 (401), wherein the hydraulic module 1 (401) is fixedly connected to the mounting plate (3), a mounting block (402) is fixedly provided at the lower end of the hydraulic module 1 (401), and a base (403) is fixedly provided at the lower end of the mounting block (402) by means of screws.

3. The device for grinding and chamfering insulating spacers for transformers according to claim 2, characterized in that: The base (403) is configured to be an inverted trapezoid, a pressure strip (404) is slidably disposed in the middle of the base (403), a pressure block (412) made of rubber is disposed at the lower end of the pressure strip (404), a spring (411) is fixedly disposed above the pressure block (412) and located inside the pressure strip (404), limiting blocks (413) are disposed on both sides of the pressure block (412), a telescopic plate (414) is fixedly disposed on the side of the limiting block (413) away from the pressure block (412), and spring sheets (415) are disposed between the telescopic plates (414), an air chamber (405) is fixedly disposed on one side of the pressure strip (404) and located at the upper end of the base (403), and a valve core (406) is fixedly disposed on the upper end of one side of the air chamber (405).

4. The device for grinding and chamfering insulating spacers for transformers according to claim 3, characterized in that: A movable plate (407) is slidably disposed inside the air chamber (405), and sealing strips are fixedly disposed on the edges of the movable plate (407) that contact the inner wall of the air chamber (405). Air holes (408) are opened on both sides of the lower end of the air chamber (405), and the air holes (408) are used to balance the internal and external air pressures of the air chamber (405). A piston tube (409) is disposed on the side of the air chamber (405) close to the pressure strip (404), and the upper end of the piston tube (409) is connected to the air chamber (405) through a bent pipe. A piston rod (410) is slidably disposed inside the piston tube (409), and the lower end of the piston rod (410) is fixedly connected to one end of the pressure strip (404).

5. The device for grinding and chamfering insulating spacers for transformers according to claim 1, characterized in that: The limit assembly (5) comprises a second hydraulic module (501), wherein the second hydraulic module (501) is located directly below the first hydraulic module (401), and a guide block (502) is fixedly provided at the upper end of the second hydraulic module (501).

6. The device for grinding and chamfering insulating spacers for transformers according to claim 5, characterized in that: A mounting shaft (503) is rotatably arranged inside a side of the guide block (502) close to the mounting plate (3); a torsion spring for controlling the mounting shaft (503) to rotate outward is arranged inside the mounting shaft (503); a brush (504) is fixedly arranged at one end of the mounting shaft (503); the brush (504) is located between two pressure strips (404); and the number of the brushes (504) corresponds to the pressure strips (404).

7. The device for grinding and chamfering insulating spacers for transformers according to claim 6, characterized in that: The lower end of the guide block (502) is located directly below the mounting shaft (503) and is rotatably provided with a rotating plate (505). A torsion spring for controlling the opening of the rotating plate (505) is also provided inside the connection between the rotating plate (505) and the guide block (502).

8. The device for grinding and chamfering insulating spacers for transformers according to claim 1, characterized in that: The pusher assembly (6) includes a hydraulic module three (601), and the hydraulic module three (601) is located on one side of the middle of the hydraulic module one (401) and the hydraulic module two (501). The hydraulic module three (601) is fixedly connected to the mounting plate (3), and a pusher plate (602) is fixedly provided on one side of the hydraulic module three (601) close to the hydraulic module one (401).

9. The device for grinding and chamfering insulating spacers for transformers according to claim 8, characterized in that: A piston tube 2 (603) is fixedly arranged on one side of the lower end of the push plate (602) close to the hydraulic module 3 (601), a piston rod 2 (604) is slidably arranged inside the piston tube 2 (603), one end of the piston rod 2 (604) is fixedly connected to the hydraulic module 3 (601), and a bracket (605) is fixedly arranged on one end of the piston tube 2 (603) close to the push plate (602).

10. The device for grinding and chamfering insulating spacers for transformers according to claim 9, characterized in that: A sliding rod (606) is slidably arranged inside the bracket (605), and a sealing block (607) is fixedly arranged at the other end of the sliding rod (606). The sealing block (607) is slidably connected to the push plate (602), and a dust collecting chamber (608) is opened on one side of the sealing block (607) through the push plate (602). An air pipe (609) is opened on one side of the dust collecting chamber (608) through the push plate (602), and the height of the air pipe (609) is flush with the opening on the mounting plate (3).

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