A high voltage switchgear with good insulation performance

Abstract

The present invention discloses a high-voltage switch complete set with good insulation performance, and relates to the technical field of high-voltage switches. The high-voltage switch complete set with good insulation performance comprises a channel steel frame and a plurality of high-voltage disconnectors fixedly connected to the side wall of the channel steel frame, each of the high-voltage disconnectors comprises a mounting frame, and the side wall of the mounting frame is fixedly connected with a fixed contact seat and a moving contact seat, the fixed contact seat is provided with a fixed contact, and the top of the moving contact seat is provided with a knife, and the top of the knife is provided with a moving contact. The high-voltage switch complete set with good insulation performance can seal the fixed contact and the moving contact during the closing and opening process, and at the same time, discharge the internal air to avoid the air being charged, so that the insulation performance is better, and the arc is avoided, which is safer and more reliable; when there is air leakage in the movable cover and the telescopic cover, the knife cannot be rotated upward to perform the closing operation, reminding the operator to perform inspection and maintenance, which is safer and more reliable.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage switches, and in particular to a high-voltage switch complete set of equipment with good insulation performance. Background Art

[0002] High-voltage isolating switches (belonging to high-voltage switches) are important switching devices in the electrical systems of power plants and substations. They must be used in conjunction with high-voltage circuit breakers. Their main functions are to ensure the safety of high-voltage electrical appliances and devices during maintenance work and to isolate voltage.

[0003] However, when the existing high-voltage switchgear is in use, in a high-voltage environment, the high voltage can break through the air and make the air electrified. This phenomenon is inevitable and the insulation performance is poor. This can easily cause the high-voltage disconnector to interfere with other electrical equipment and affect the use of other electrical equipment. In addition, since the high-voltage disconnector does not have an arc extinguishing function, it cannot be used for switching operations that will generate arcs. It has great limitations in use and is difficult to meet the needs of power on and off. Summary of the invention

[0004] The object of the present invention is to provide a high voltage switchgear with good insulation performance to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-voltage switch complete set with good insulation performance, comprising a channel steel frame and a plurality of high-voltage disconnectors fixedly connected to the side wall of the channel steel frame, each of the high-voltage disconnectors comprising a mounting frame, and the side wall of the mounting frame is fixedly connected with a fixed contact seat and a moving contact seat, the fixed contact seat is provided with a fixed contact, and the top of the moving contact seat is provided with a knife, the top of the knife is provided with a moving contact, and the side wall of the knife is fixedly connected with a fixing pin, the top of the knife is fixedly connected with two symmetrically arranged fixed blocks, and the knife is rotatably connected to the side wall of the fixed block through a rotating shaft, and the fixed block The side wall is provided with a limiting mechanism for limiting the rotating shaft, and the top of the gate knife is connected to a movable cover through a first reset mechanism, the top and bottom of the movable cover are fixedly connected to a telescopic cover, and the top of the gate knife is fixedly connected to a fixed box, and a movable plate is connected to the fixed box through a second reset mechanism, the fixed box is divided into a left chamber and a right chamber by the movable plate, and the movement of the movable plate is pushed by a first pushing mechanism, a telescopic tube is fixedly connected between the fixed box and the movable cover, and a first one-way valve is arranged in the telescopic tube, and an air outlet pipe is fixedly connected to the side wall of the fixed box, and a second one-way valve is arranged in the air outlet pipe.

[0006] Preferably, the first resetting mechanism includes a connecting plate fixedly connected to the side wall of the movable cover, and two symmetrically arranged sleeve rods are fixedly connected to the bottom of the connecting plate, the side wall of each sleeve rod is sleeved with a sleeve, and the lower end of the sleeve is fixed to the top of the knife, the side wall of each sleeve is sleeved with a first spring, and a guide assembly is arranged between the sleeve rod and the sleeve.

[0007] Preferably, the second reset mechanism comprises a first T-shaped guide rod inserted into the side wall of the fixed box, and one end of the first T-shaped guide rod is fixed to the side wall of the movable plate, and the side wall of each of the first T-shaped guide rods is sleeved with a second spring.

[0008] Preferably, the first pushing mechanism includes an L-shaped block fixedly connected to the side wall of the connecting plate, and the bottom of the L-shaped block is fixedly connected to the inclined plate, and a moving rod is inserted into the side wall of the fixed box, one end of the moving rod is fixed to the side wall of the moving plate, and the other end of the moving rod can slide on the inclined plate.

[0009] Preferably, the limiting mechanism comprises a disc fixedly connected to one end of the rotating shaft, and a slot is provided on the side wall of the disc, the side wall of the fixed block is connected to the first movable block through a third reset mechanism, and the side wall of the first movable block is fixedly connected to an insertion block.

[0010] Preferably, the third reset mechanism includes an L-shaped plate fixedly connected to the side wall of the fixed block, and two symmetrically arranged second T-shaped guide rods are inserted into the side wall of the L-shaped plate, one end of the second T-shaped guide rod is fixed to the side wall of the first movable block, and the side wall of each second T-shaped guide rod is sleeved with a third spring, and the movement of the first movable block is driven by a second pushing mechanism.

[0011] Preferably, the second pushing mechanism includes a first connecting frame fixedly connected to the top of the first moving block, and the side wall of the first connecting frame is fixedly connected with an arc plate, the side wall of the arc plate is provided with an inclined surface, and the movement of the arc plate is pushed by a third pushing mechanism.

[0012] Preferably, the third pushing mechanism includes a piston rod inserted in the top of the right chamber of the fixed box, and the upper end of the piston rod is fixedly connected to the second movable block, the second movable block is connected to the top of the fixed box through a fourth reset mechanism, the side wall of the second movable block is fixedly connected to the second connecting frame, and the bottom of the second connecting frame is fixedly connected to the pushing rod, and the lower end of the pushing rod can slide on the inclined plane.

[0013] Preferably, the fourth reset mechanism includes two symmetrically arranged third T-shaped guide rods fixedly connected to the top of the fixed box, the second moving block is sleeved on the side walls of the third T-shaped guide rods, and the side walls of each third T-shaped guide rod are sleeved with a fourth spring.

[0014] Preferably, the guide assembly comprises a slide groove provided on the side wall of each sleeve, a guide pin is slidably connected in the slide groove, and one end of the guide pin is fixed to the side wall of the sleeve rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This high-voltage switchgear with good insulation performance is provided with a first reset mechanism and a first pushing mechanism, etc., so that when closing the switch, the fixing pin is pushed by the external insulating rod, so that the knife gate rotates upward along the rotating shaft, and when the upper telescopic cover abuts against the side wall of the fixed contact seat, the fixed contact cover can be lifted, and at the same time, the upper telescopic cover is gradually compressed, and when the knife gate continues to rotate upward, the movable cover gradually moves in the direction close to the knife gate, and at the same time, the connecting plate is driven to move and reset in the direction close to the knife gate, and the sleeve rod slides into the sleeve tube, so that the first spring is compressed, and when the knife gate abuts against the lower telescopic cover and is gradually compressed, the fixed contact and the moving contact can be sealed at this time, and at the same time, when the connecting plate moves in the direction close to the knife gate, the inclined plate can be driven to move synchronously through the L-shaped block, and the inclined plate abuts against the end of the moving rod, thereby pushing the moving plate to move in the direction away from the outlet pipe, and at the same time, the second spring is compressed, and at this time, the first one-way valve is opened, and the second one-way valve is opened. When the first check valve is closed, the air in the movable cover and the telescopic cover can be absorbed and enter the fixed box. When the movable plate continues to move, negative pressure can be generated in the right chamber of the fixed box. When the knife continues to rotate, the moving contact can close the fixed contact. When opening the switch, the knife rotates downward along the rotating shaft. At this time, the movable cover and the connecting plate can move and reset in the direction away from the knife under the action of the first spring. At this time, the moving rod and the inclined plate gradually separate, and the movable plate can move and reset in the direction close to the air outlet pipe under the action of the second spring. At the same time, the first check valve is closed and the second check valve is opened. At this time, the air temporarily stored in the right chamber of the fixed box can be discharged through the air outlet pipe. When the knife continues to rotate, it can drive the moving contact and the fixed contact to open the switch, so that in the process of closing and opening the switch, the fixed contact and the moving contact can be sealed. At the same time, the internal air is discharged to avoid air electrification, so that the insulation performance is better, and the arc is avoided, which is safer and more reliable.By setting a limit mechanism, etc., when closing the switch, negative pressure can be generated in the right chamber. Under the action of pressure, the piston rod and the second moving block can be pushed downward. At the same time, the fourth spring is compressed. At the same time, the push rod is driven downward by the second connecting frame and abuts against the inclined surface, so that the arc plate can be pushed to move, and the first moving block is driven to move away from the fixed block through the first connecting frame. At the same time, the third spring is compressed, thereby driving the plug block to move. At this time, the disc and the rotating shaft can rotate normally, ensuring that the knife switch can rotate upward normally to close the switch. During operation, if the movable cover and telescopic cover leak, the external air can also be drawn into the right chamber, and no negative pressure will be generated in the right chamber, so that the push rod will not move downward and will abut against the inclined surface. At this time, the plug block can abut against the end of the disc under the action of the third spring. When the knife rotates, the disc can be driven to rotate through the shaft. When the plug block is aligned with the slot, the plug block can be inserted into the slot for limiting under the action of the third spring. At this time, the knife cannot rotate upward for closing operation, reminding the operator to perform inspection and maintenance, which is safer and more reliable. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the isolating switch in the present invention;

[0019] Figure 3 It is a partial cross-sectional structural schematic diagram of the telescopic cover and the fixed box in the present invention;

[0020] Figure 4 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 5 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0022] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0023] Figure 7 for Figure 5 Schematic diagram of the enlarged structure at D in the middle.

[0024] In the figure: 1, channel steel frame; 2, limit mechanism; 201, disc; 202, slot; 203, first moving block; 204, plug block; 3, first reset mechanism; 301, connecting plate; 302, sleeve rod; 303, sleeve; 304, first spring; 4, second reset mechanism; 401, first T-shaped guide rod; 402, second spring; 5, first push mechanism; 501, moving rod; 502, L-shaped block; 503, inclined plate; 6, third reset mechanism; 601, L-shaped plate; 602, second T-shaped guide rod; 603, third spring; 7, second push mechanism; 701, first connecting frame; 702, arc plate; 703, inclined surface; 8, third Pushing mechanism; 801, second moving block; 802, piston rod; 803, second connecting frame; 804, pushing rod; 9, fourth reset mechanism; 901, fourth spring; 902, third T-shaped guide rod; 10, guide assembly; 1001, slide groove; 1002, guide pin; 11, high-voltage disconnector; 1101, mounting frame; 1102, fixed contact seat; 1103, moving contact seat; 1104, fixed contact; 1105, knife switch; 1106, moving contact; 1107, fixing pin; 12, moving cover; 13, telescopic cover; 14, fixed box; 15, moving plate; 16, telescopic tube; 17, exhaust pipe; 18, fixed block; 19, rotating shaft. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 7The present invention provides a technical solution: a high-voltage switch complete set with good insulation performance, comprising a channel steel frame 1 and a plurality of high-voltage disconnectors 11 fixedly connected to the side wall of the channel steel frame 1, each high-voltage disconnector 11 comprising a mounting frame 1101, and a fixed contact seat 1102 and a moving contact seat 1103 are fixedly connected to the side wall of the mounting frame 1101, a fixed contact 1104 is arranged on the fixed contact seat 1102, and a knife 1105 is arranged on the top of the moving contact seat 1103, a moving contact 1106 is arranged on the top of the knife 1105, and the side wall of the knife 1105 is fixedly connected There is a fixing pin 1107, the top of the gate knife 1105 is fixedly connected to two symmetrically arranged fixing blocks 18, and the gate knife 1105 is rotatably connected to the side wall of the fixing block 18 through a rotating shaft 19, and the side wall of the fixing block 18 is provided with a limiting mechanism 2 for limiting the rotating shaft 19, and the top of the gate knife 1105 is connected to the moving cover 12 through a first reset mechanism 3, and the top and bottom of the moving cover 12 are fixedly connected to the telescopic cover 13, and there is a gap between the telescopic cover 13 below and the top of the gate knife 1105, which is convenient for drainage, etc., and the top of the gate knife 1105 is fixedly connected to a fixed The fixed box 14 is connected with a movable plate 15 through the second reset mechanism 4. The fixed box 14 is divided into a left chamber and a right chamber by the movable plate 15, and the movement of the movable plate 15 is pushed by the first pushing mechanism 5. A telescopic tube 16 is fixedly connected between the fixed box 14 and the movable cover 12, and a first one-way valve is arranged in the telescopic tube 16. The conducting direction of the first one-way valve is from the movable cover 12 to the right chamber of the fixed box 14. The side wall of the fixed box 14 is fixedly connected with an air outlet pipe 17. The telescopic tube 16 and the air outlet pipe 17 are connected to the right chamber, and a first one-way valve is arranged in the air outlet pipe 17. There is a second one-way valve, and the conduction direction of the second one-way valve is from the right chamber of the fixed box 14 to the outside. In the process of closing and opening the switch, the fixed contact 1104 and the moving contact 1106 can be sealed. At the same time, the internal air is discharged to avoid the air being charged, so that the insulation performance is better, and the arc is avoided, which is safer and more reliable; the sealing state of the movable cover 12 and the telescopic cover 13 can be detected. When the movable cover 12 and the telescopic cover 13 have air leakage, the knife 1105 cannot be rotated upward to perform the closing operation, reminding the operator to carry out inspection and maintenance, which is safer and more reliable.

[0027] See also Figure 4 and Figure 5 The first reset mechanism 3 includes a connecting plate 301 fixedly connected to the side wall of the movable cover 12, and two symmetrically arranged sleeve rods 302 are fixedly connected to the bottom of the connecting plate 301, and the side wall of each sleeve rod 302 is sleeved with a sleeve 303, and the lower end of the sleeve 303 is fixed to the top of the gate knife 1105, and the side wall of each sleeve 303 is sleeved with a first spring 304, and a guide assembly 10 is arranged between the sleeve rod 302 and the sleeve 303, which plays a guiding and resetting role for the movement of the movable cover 12.

[0028] See also Figure 5 and Figure 6 The second reset mechanism 4 includes a first T-shaped guide rod 401 inserted into the side wall of the fixed box 14, and one end of the first T-shaped guide rod 401 is fixed to the side wall of the movable plate 15. The side wall of each first T-shaped guide rod 401 is sleeved with a second spring 402, which guides and resets the movement of the movable plate 15.

[0029] See also Figure 4 and Figure 5 The first pushing mechanism 5 includes an L-shaped block 502 fixedly connected to the side wall of the connecting plate 301, and the bottom of the L-shaped block 502 is fixedly connected to the inclined plate 503. A moving rod 501 is inserted into the side wall of the fixed box 14. One end of the moving rod 501 is fixed to the side wall of the moving plate 15, and the other end of the moving rod 501 can slide on the inclined plate 503. When the connecting plate 301 moves toward the direction close to the gate knife 1105, the inclined plate 503 can be driven to move synchronously through the L-shaped block 502, and the inclined plate 503 is abutted against the end of the moving rod 501, thereby pushing the moving plate 15 to move in the direction away from the air outlet pipe 17.

[0030] See also Figure 7 The limiting mechanism 2 includes a disc 201 fixedly connected to one end of the rotating shaft 19, and a slot 202 is opened on the side wall of the disc 201. The side wall of the fixed block 18 is connected to the first moving block 203 through the third reset mechanism 6, and the side wall of the first moving block 203 is fixedly connected to the insert block 204.

[0031] See also Figure 7 The third reset mechanism 6 includes an L-shaped plate 601 fixedly connected to the side wall of the fixed block 18, and two symmetrically arranged second T-shaped guide rods 602 are inserted into the side wall of the L-shaped plate 601, one end of the second T-shaped guide rod 602 is fixed to the side wall of the first movable block 203, and the side wall of each second T-shaped guide rod 602 is sleeved with a third spring 603, and the movement of the first movable block 203 is pushed by the second pushing mechanism 7, which plays a guiding and resetting role in the movement of the first movable block 203.

[0032] See also Figure 6 and Figure 7The second pushing mechanism 7 includes a first connecting frame 701 fixedly connected to the top of the first moving block 203, and the side wall of the first connecting frame 701 is fixedly connected with an arc plate 702, the side wall of the arc plate 702 is provided with an inclined surface 703, and the movement of the arc plate 702 is pushed by the third pushing mechanism 8, and the arc plate 702 is pushed to move by the third pushing mechanism 8, and the first moving block 203 is driven to move away from the fixed block 18 through the first connecting frame 701. At the same time, the third spring 603 is compressed, thereby driving the plug block 204 to move. At this time, the disc 201 and the rotating shaft 19 can rotate normally, ensuring that the knife 1105 can rotate upward normally to perform the closing operation.

[0033] See also Figure 5 and Figure 6 The third pushing mechanism 8 includes a piston rod 802 inserted into the top of the right chamber of the fixed box 14, and the upper end of the piston rod 802 is fixedly connected to the second moving block 801, and the second moving block 801 is connected to the top of the fixed box 14 through the fourth reset mechanism 9, and the side wall of the second moving block 801 is fixedly connected to the second connecting frame 803, and the bottom of the second connecting frame 803 is fixedly connected to the push rod 804, and the lower end of the push rod 804 can slide on the inclined surface 703. When closing the switch, negative pressure can be generated in the right chamber. Under the action of pressure, the piston rod 802 and the second moving block 801 can be pushed downward. At the same time, the push rod 804 is driven to move downward through the second connecting frame 803 and resist the inclined surface 703, thereby pushing the arc plate 702 to move.

[0034] See also Figure 4 The fourth reset mechanism 9 includes two symmetrically arranged third T-shaped guide rods 902 fixedly connected to the top of the fixed box 14, the second moving block 801 is sleeved on the side walls of the third T-shaped guide rods 902, and the side walls of each third T-shaped guide rod 902 are sleeved with a fourth spring 901, which guides and resets the movement of the second moving block 801.

[0035] See also Figure 4 The guide assembly 10 includes a slide groove 1001 opened on the side wall of each sleeve 303, and a guide pin 1002 is slidably connected in the slide groove 1001, and one end of the guide pin 1002 is fixed to the side wall of the sleeve rod 302, which plays a guiding and resetting role in the movement of the sleeve rod 302.

[0036] Working principle: When in use, when closing the switch, the fixing pin 1107 is pushed by the external insulating rod, so that the knife 1105 rotates upward along the rotating shaft 19, and when the telescopic cover 13 above abuts against the side wall of the fixed contact seat 1102, the fixed contact 1104 can be covered. At the same time, the telescopic cover 13 above is gradually compressed. When the knife 1105 continues to rotate upward, the movable cover 12 gradually moves toward the direction close to the knife 1105, and at the same time, the connecting plate 301 is driven to move and reset toward the direction close to the knife 1105, and the sleeve rod 302 slides into the sleeve 303, so that the first spring 304 is compressed. When the knife 1105 abuts against the telescopic cover 13 below and is gradually compressed, the fixed contact 1104 can be covered. 4 and the moving contact 1106 are sealed. At the same time, when the connecting plate 301 moves toward the direction close to the knife 1105, the inclined plate 503 can be driven to move synchronously through the L-shaped block 502, and the inclined plate 503 is abutted against the end of the moving rod 501, thereby pushing the moving plate 15 to move away from the air outlet pipe 17. At the same time, the second spring 402 is compressed. At this time, the first one-way valve is opened and the second one-way valve is closed, so that the air in the moving cover 12 and the telescopic cover 13 can be absorbed and enter the fixed box 14. When the moving plate 15 continues to move, negative pressure can be generated in the right chamber of the fixed box 14. When the knife 1105 continues to rotate, the moving contact 1106 can close the switch with the fixed contact 1104.

[0037] At the same time, when closing the switch, negative pressure can be generated in the right chamber. Under the action of pressure, the piston rod 802 and the second moving block 801 can be pushed downward. At the same time, the fourth spring 901 is compressed. At the same time, the push rod 804 is driven downward by the second connecting frame 803 and abuts against the inclined surface 703, thereby pushing the arc plate 702 to move, and the first moving block 203 is driven to move away from the fixed block 18 through the first connecting frame 701. At the same time, the third spring 603 is compressed, thereby driving the plug block 204 to move. At this time, the disc 201 and the rotating shaft 19 can rotate normally, ensuring that the knife 1105 can rotate upward normally to perform the closing operation. If When the movable cover 12 and the telescopic cover 13 leak, the external air can also be drawn into the right chamber, and no negative pressure is generated in the right chamber, so that the push rod 804 does not move downward and abuts against the inclined surface 703. At this time, the plug block 204 can abut against the end of the disc 201 under the action of the third spring 603. When the knife 1105 rotates, the disc 201 can be driven to rotate through the rotating shaft 19. When the plug block 204 is aligned with the slot 202, the plug block 204 can be inserted into the slot 202 for limiting under the action of the third spring 603. At this time, the knife 1105 cannot rotate upward to perform the closing operation, reminding the operator to perform inspection and maintenance, which is safer and more reliable.

[0038] When opening the switch, the knife 1105 is rotated downward along the rotating shaft 19. At this time, the movable cover 12 and the connecting plate 301 can be moved and reset in the direction away from the knife 1105 under the action of the first spring 304. At this time, the movable rod 501 and the inclined plate 503 are gradually separated, and the movable plate 15 can be moved and reset in the direction close to the air outlet pipe 17 under the action of the second spring 402. At the same time, the first one-way valve is closed and the second one-way valve is opened. At this time, the air temporarily stored in the right chamber of the fixed box 14 can be discharged through the air outlet pipe 17. When the knife 1105 continues to rotate, it can drive the moving contact 1106 and the fixed contact 1104 to open the switch, so that in the process of closing and opening the switch, the fixed contact 1104 and the moving contact 1106 can be sealed. At the same time, the internal air is discharged to avoid the air being charged, so that the insulation performance is better, and the arc is avoided, which is safer and more reliable.

Claims

1. A high-voltage switchgear with good insulation performance, comprising a channel steel frame (1) and a plurality of high-voltage disconnectors (11) fixedly connected to the side wall of the channel steel frame (1), each of the high-voltage disconnectors (11) comprising a mounting frame (1101), and a fixed contact seat (1102) and a moving contact seat (1103) are fixedly connected to the side wall of the mounting frame (1101), a fixed contact (1104) is arranged on the fixed contact seat (1102), and a knife (1105) is arranged on the top of the moving contact seat (1103), a moving contact (1106) is arranged on the top of the knife (1105), and a fixing pin (1107) is fixedly connected to the side wall of the knife (1105), characterized in that: The top of the knife (1105) is fixedly connected to two symmetrically arranged fixed blocks (18), and the knife (1105) is rotatably connected to the side wall of the fixed block (18) via a rotating shaft (19), the side wall of the fixed block (18) is provided with a limiting mechanism (2) for limiting the rotating shaft (19), and the top of the knife (1105) is connected to a movable cover (12) via a first reset mechanism (3), the top and bottom of the movable cover (12) are fixedly connected to a telescopic cover (13), and the top of the knife (1105) is fixedly connected to a fixed cover (13). A box (14), a movable plate (15) is connected to the fixed box (14) via a second reset mechanism (4), the fixed box (14) is divided into a left chamber and a right chamber by the movable plate (15), and the movable plate (15) is pushed by a first pushing mechanism (5), a telescopic tube (16) is fixedly connected between the fixed box (14) and the movable cover (12), and a first non-return valve is arranged in the telescopic tube (16), and an air outlet pipe (17) is fixedly connected to the side wall of the fixed box (14), and a second non-return valve is arranged in the air outlet pipe (17).

2. A high-voltage switchgear with good insulation performance according to claim 1, characterized in that: The first reset mechanism (3) comprises a connecting plate (301) fixedly connected to the side wall of the movable cover (12), and two symmetrically arranged sleeve rods (302) are fixedly connected to the bottom of the connecting plate (301), the side wall of each sleeve rod (302) is sleeved with a sleeve (303), and the lower end of the sleeve (303) is fixed to the top of the gate knife (1105), the side wall of each sleeve tube (303) is sleeved with a first spring (304), and a guide assembly (10) is arranged between the sleeve rod (302) and the sleeve tube (303).

3. A high-voltage switchgear with good insulation performance according to claim 1, characterized in that: The second reset mechanism (4) comprises a first T-shaped guide rod (401) inserted into the side wall of the fixed box (14), one end of the first T-shaped guide rod (401) is fixed to the side wall of the movable plate (15), and the side wall of each of the first T-shaped guide rods (401) is sleeved with a second spring (402).

4. A high-voltage switchgear with good insulation performance according to claim 2, characterized in that: The first pushing mechanism (5) comprises an L-shaped block (502) fixedly connected to the side wall of the connecting plate (301), and the bottom of the L-shaped block (502) is fixedly connected to the inclined plate (503), and a moving rod (501) is inserted into the side wall of the fixed box (14), one end of the moving rod (501) is fixed to the side wall of the moving plate (15), and the other end of the moving rod (501) is capable of sliding on the inclined plate (503).

5. A high-voltage switchgear with good insulation performance according to claim 1, characterized in that: The limiting mechanism (2) comprises a disc (201) fixedly connected to one end of the rotating shaft (19), and a slot (202) is provided on a side wall of the disc (201); the side wall of the fixed block (18) is connected to a first movable block (203) via a third reset mechanism (6), and the side wall of the first movable block (203) is fixedly connected to an insert block (204).

6. A high-voltage switchgear with good insulation performance according to claim 5, characterized in that: The third resetting mechanism (6) comprises an L-shaped plate (601) fixedly connected to the side wall of the fixed block (18), and two symmetrically arranged second T-shaped guide rods (602) are inserted into the side wall of the L-shaped plate (601), one end of the second T-shaped guide rod (602) is fixed to the side wall of the first moving block (203), and the side wall of each second T-shaped guide rod (602) is sleeved with a third spring (603), and the movement of the first moving block (203) is driven by the second driving mechanism (7).

7. A high-voltage switchgear with good insulation performance according to claim 6, characterized in that: The second pushing mechanism (7) comprises a first connecting frame (701) fixedly connected to the top of the first moving block (203), and the side wall of the first connecting frame (701) is fixedly connected to an arc-shaped plate (702), the side wall of the arc-shaped plate (702) is provided with an inclined surface (703), and the movement of the arc-shaped plate (702) is pushed by the third pushing mechanism (8).

8. A high-voltage switchgear with good insulation performance according to claim 7, characterized in that: The third pushing mechanism (8) comprises a piston rod (802) inserted into the top of the right chamber of the fixed box (14), and the upper end of the piston rod (802) is fixedly connected to a second moving block (801), the second moving block (801) is connected to the top of the fixed box (14) via a fourth reset mechanism (9), the side wall of the second moving block (801) is fixedly connected to a second connecting frame (803), and the bottom of the second connecting frame (803) is fixedly connected to a pushing rod (804), and the lower end of the pushing rod (804) is capable of sliding on the inclined surface (703).

9. A high-voltage switchgear with good insulation performance according to claim 8, characterized in that: The fourth reset mechanism (9) comprises two symmetrically arranged third T-shaped guide rods (902) fixedly connected to the top of the fixed box (14); the second moving block (801) is sleeved on the side walls of the third T-shaped guide rods (902); and the side walls of each third T-shaped guide rod (902) are sleeved with a fourth spring (901).

10. A high-voltage switchgear with good insulation performance according to claim 2, characterized in that: The guide assembly (10) comprises a slide groove (1001) formed on the side wall of each sleeve (303), a guide pin (1002) being slidably connected in the slide groove (1001), and one end of the guide pin (1002) is fixed to the side wall of the sleeve rod (302).

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