Environment-friendly gas insulation ring main unit

Abstract

An environment-friendly gas insulation ring main unit relates to the technical field of electrical equipment. An environment-friendly gas insulated looped network box comprises an airtight box, a driving box and a looped network box, the airtight box is installed on the upper portion of the driving box, the driving box is installed on the upper portion of the looped network box, the looped network box is provided with a sealing door, and a function module is installed in the looped network box. The device has the beneficial effects that the reciprocating plunger pump B is driven by the double-drive pump to operate, nitrogen recovery before a sealing door is opened during overhauling is completed, the reciprocating plunger pump A is driven by the double-drive pump to operate after the sealing door is closed, air is displaced by nitrogen, nitrogen is released into the ring main unit, residual oxygen in the ring main unit is consumed by arranging the oxygen consumption assembly, and the nitrogen recovery efficiency is improved. Namely, the ring main unit is completely filled with nitrogen, so that the nitrogen is supplemented while the insulation is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to an environmentally friendly gas insulated ring main unit. BACKGROUND

[0002] The environmentally friendly gas insulated ring main unit is a ring main unit using environmentally friendly gas as insulation medium, which realizes the environmental protection requirements of no oil and no SF6 through the design of full sealing. This kind of product usually uses nitrogen gas and synthetic gas such as C4, C5 and their mixed gas as insulation medium to play the role of insulation and arc extinguishing, so as to ensure the normal operation of the equipment.

[0003] The environmentally friendly gas of the existing gas insulated ring main unit is stored in the sealed gas tank in the switchgear. When the sealed door is opened for maintenance each time, the nitrogen gas in the tank diffuses into the atmosphere. After the maintenance is completed, the nitrogen gas in the sealed gas tank needs to be released into the tank to maintain the insulation effect. When the nitrogen gas is released, the air in the tank cannot be completely replaced, which reduces the insulation effect. In addition, nitrogen gas needs to be supplemented regularly, which causes waste of energy. SUMMARY

[0004] In order to solve the problems of poor insulation effect and waste of energy of the existing environmentally friendly gas insulated ring main unit, the present application provides an environmentally friendly gas insulated ring main unit.

[0005] The technical scheme provided by the present application is as follows: an environmentally friendly gas insulated ring main unit, comprising an air-tight tank, a drive tank and a ring main unit, the air-tight tank is installed on the upper part of the drive tank, the drive tank is installed on the upper part of the ring main unit, the ring main unit is provided with a sealed door, and a functional module is installed in the ring main unit.

[0006] An air capsule and a nitrogen capsule are installed in the air-tight tank, the nitrogen capsule is located on the right side, and the air capsule is located on the left side. A double-drive pump is installed in the drive tank. Reciprocating plunger pumps A and B are respectively arranged on the left and right sides of the double-drive pump. The inlet of the reciprocating plunger pump A is connected with an air suction pipe, the air suction pipe extends to the bottom of the ring main unit and is connected with an air suction manifold, the air suction manifold is provided with uniformly distributed air holes, the outlet of the reciprocating plunger pump A is connected with the air capsule through a pipeline, an air discharge pipe is arranged between the air capsule and the ring main unit, and an electromagnetic valve A is installed on the air discharge pipe. The inlet of the reciprocating plunger pump B is connected with a nitrogen suction pipe, the nitrogen suction pipe extends to the upper part of the ring main unit and is connected with a nitrogen suction cover, the outlet of the reciprocating plunger pump B is connected with the nitrogen capsule through a pipeline, a nitrogen discharge pipe is arranged between the nitrogen capsule and the ring main unit, an electromagnetic valve B is installed on the nitrogen discharge pipe, and a nitrogen detector is arranged in the ring main unit.

[0007] The double-drive pump comprises a pump body, a reciprocating plunger pump A and a reciprocating plunger pump B symmetrically arranged on two sides of the pump body, and the reciprocating plunger pump A and the reciprocating plunger pump B are the same in structure, and the reciprocating plunger pump A is taken as an example: a left cylinder sleeve is arranged on the left side of the pump body, a plunger A is arranged in the left cylinder sleeve, the plunger A is connected with the left cylinder sleeve in a gap fit mode through a piston ring, an inlet one-way valve and an outlet one-way valve are arranged on the left side of the left cylinder sleeve, a pump head is connected with the left end surface of the left cylinder sleeve through threads and a sealing ring, and a compression spring is arranged between the pump head and the plunger A;

[0008] Similarly, a right cylinder sleeve is arranged on the right side of the pump body, and a plunger B is arranged in the right cylinder sleeve.

[0009] A motor is mounted on the outer side of the center of the pump body, an output shaft of the motor extends into the pump body, the output shaft is connected with a front shaft through bolts, a shaft sleeve is sleeved between the front shaft and the output shaft, the output shaft, the front shaft and the shaft sleeve are connected through a flat key, a cam A is arranged on the front shaft, a cam B is arranged on the shaft sleeve, a flat thrust bearing is arranged between the cam B and the output shaft, a flat thrust bearing is arranged between the cam B and the cam A, the cam A and the front shaft are connected through a flat thrust bearing, the front shaft and the cam A are connected through a one-way rotation assembly, and the shaft sleeve and the cam B are connected through a one-way rotation assembly.

[0010] The one-way rotation assemblies are the same in structure, and the one-way rotation assembly of the cam B and the shaft sleeve is taken as an example: the one-way rotation assembly is six, and is uniformly arranged along the circumference of the shaft sleeve; each one-way rotation assembly comprises a torsion plate, the torsion plate is arranged in parallel along the axis of the shaft sleeve, cantilever shafts are arranged on the two sides of the torsion plate, the two cantilever shafts are each rotationally connected with an ear plate, the ear plate is welded on the outer circle of the shaft sleeve, a torsion spring is sleeved on one of the cantilever shafts, one side of the torsion spring is fixed on the torsion plate, and the other side of the torsion spring is fixed on the ear plate, so that the torsion plate on the sleeve pipe faces the counterclockwise direction, and the torsion plate on the front shaft faces the clockwise direction; a strip-shaped groove is formed in the inner holes of the cam A and the cam B, when the torsion plate is outwardly opened, the torsion plate is inserted into the strip-shaped groove, the cam A can push the plunger A to move when the cam A rotates, and the cam B can push the plunger B to move when the cam B rotates.

[0011] An oxygen consumption assembly is arranged in the ring network box, the oxygen consumption assembly comprises a seat plate, the seat plate is connected to the inner wall of the ring network box through bolts, a pressing plate is connected to the outer side of the seat plate through a guide rail, a guide column is arranged on the inner side of the pressing plate, a guide sleeve is arranged on the outer side of the seat plate, the guide column and the guide sleeve are connected in a sliding mode, an electromagnetic coil is sleeved on the outer side of the guide column, the guide column is made of carbon steel, the guide sleeve is made of aluminum metal, a steel spike is arranged on the inner side of the pressing plate, and a deoxidizer with an oxygen isolation package is arranged between the steel spike and the seat plate.

[0012] A door opening button and a door closing button are arranged on the sealing door.

[0013] Rolling balls are uniformly arranged on the outer circles of the cam A and the cam B.

[0014] The application has the beneficial effects that: the application drives the reciprocating plunger pump B through the double-drive pump to run, completes the nitrogen recovery before the sealed door is opened for maintenance, drives the reciprocating plunger pump A through the double-drive pump to run after the door is closed, completes the nitrogen displacement of air, the nitrogen is released into the ring network box, the residual oxygen in the ring network box is consumed through the setting of the oxygen consumption assembly, that is, the ring network box is completely filled with nitrogen, the insulation is ensured, and the nitrogen supplement is also completed;

[0015] The double-drive pump is provided with the one-way rotation assembly in the cam A and the cam B, the motor is driven to rotate the cam A and the cam B respectively when the motor is positively rotated and reversely rotated, reciprocating plunger pump A and reciprocating plunger pump B are respectively driven to run, one motor is saved, and misoperation caused by the installation of two motors for driving is also prevented. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the appearance diagram of the application; Figure 1 is the appearance diagram of the application;

[0017] Figure 2 is the structural schematic diagram of the application; Figure 2 is the structural schematic diagram of the application;

[0018] Figure 3 is the structural schematic diagram of the double-drive pump in the application; Figure 3 is the structural schematic diagram of the double-drive pump in the application;

[0019] Figure 4 is the structural schematic diagram of the cam A, the cam B and the motor shaft in the double-drive pump; Figure 4 is the structural schematic diagram of the cam A, the cam B and the motor shaft in the double-drive pump;

[0020] Figure 5 is the enlarged view of C in figure 4; Figure 5 is the enlarged view of C in figure 4; Figure 4

[0021] Figure 6 is the side view of figure 4; Figure 6 is the side view of figure 4; Figure 4 Figure 7 is the A-A cross-sectional view of figure 4;

[0022] is the A-A cross-sectional view of figure 4; Figure 7 Figure 4 Figure 8 is the B-B cross-sectional view of figure 4; is the B-B cross-sectional view of figure 4;

[0023] Figure 8 Figure 9 is the structural schematic diagram of the oxygen consumption assembly in the application; Figure 4 is the structural schematic diagram of the oxygen consumption assembly in the application;

[0024] Figure 10 is the structural schematic diagram of the application when filling nitrogen in the ring network box; Figure 9 is the structural schematic diagram of the application when filling nitrogen in the ring network box;

[0025] Figure 11 is the structural schematic diagram of the application when filling nitrogen in the ring network box; Figure 10 is the structural schematic diagram of the application when filling nitrogen in the ring network box;

[0026] ​​In the diagram: 1-Drive box, 2-Ring mesh box, 3-Sealed door, 301-Open door button, 302-Close door button, 4-Functional module, 5-Dual drive pump, 6-Air capsule, 7-Nitrogen capsule, 8-Air intake pipe, 9-Air exhaust pipe, 10-Nitrogen intake pipe, 11-Nitrogen exhaust pipe, 12-Nitrogen intake hood, 13-Air intake manifold, 14-Oxygen consumption component, 1401-Seat plate, 1402-Pressure plate, 1403-Guide rail, 1404-Steel spike, 1405-Guide sleeve, 1406-Guide column, 1407-Electromagnetic coil, 15-Pump body, 1501-Left cylinder liner, 15 02-Right cylinder liner, 16-Reciprocating piston pump A, 17-Reciprocating piston pump B, 18-Cam A, 19-Cam B, 20-Output shaft, 2001-Front shaft, 2002-Busset, 21-Strip groove, 22-Torsion plate, 23-Flat key, 24-Torsion spring, 25-Cantilever shaft, 26-Ear plate, 27-Nitrogen detector, 28-Ball bearing, 29-Compression spring, 30-Plunger B, 31-Piston ring, 32-Outlet check valve, 33-Plunger A, 34-Pump head, 35-Inlet check valve, 36-Solenoid valve A, 37-Solenoid valve B, 38-Airtight box, 39-Motor. Detailed Implementation

[0027] like Figures 1-10 As shown, an environmentally friendly gas-insulated ring main unit includes an airtight box 38, a drive box 1, and a ring main unit 2. The airtight box 38 is installed on the upper part of the drive box 1, the drive box 1 is installed on the upper part of the ring main unit 2, the ring main unit 2 is provided with a sealing door 3, and a functional module 4 is installed inside the ring main unit 2.

[0028] An air-tight box 38 contains an air capsule 6 and a nitrogen capsule 7, with the nitrogen capsule 7 located on the right and the air capsule 6 on the left. A dual-drive pump 5 is installed in the drive box 1. Reciprocating plunger pumps A16 and B17 are respectively installed on the left and right sides of the dual-drive pump 5. The inlet of reciprocating plunger pump A16 is connected to an air intake pipe 8, which extends to the bottom of the ring network box 2 and connects to an air intake manifold 13. The air intake manifold 13 has evenly distributed vent holes. The outlet of reciprocating plunger pump A16 is connected to the air capsule 6 via a pipe. A connection is established between the air capsule 6 and the ring network box 2. There is an air exhaust pipe 9, on which a solenoid valve A36 is installed. The inlet of the reciprocating plunger pump B17 is connected to a nitrogen suction pipe 10. The nitrogen suction pipe 10 extends to the upper part of the ring network box 2 and connects to a nitrogen suction hood 12. The nitrogen suction hood 12 has a large absorption area, which increases the area for absorbing nitrogen. The outlet of the reciprocating plunger pump B17 is connected to a nitrogen capsule 7. A nitrogen exhaust pipe 11 is provided between the nitrogen capsule 7 and the ring network box 2. A solenoid valve B37 is installed on the nitrogen exhaust pipe 11. A nitrogen detector 27 is provided inside the ring network box 2 to detect the nitrogen concentration inside the ring network box 2.

[0029] The double-drive pump 5 comprises a pump body 15, a reciprocating plunger pump A 16 and a reciprocating plunger pump B 17 symmetrically arranged on both sides of the pump body 15, and the reciprocating plunger pump A 16 and the reciprocating plunger pump B 17 are the same in structure. Taking the reciprocating plunger pump A 16 as an example: a left cylinder sleeve 1501 is arranged on the left side of the pump body 15, a plunger A 33 is arranged in the left cylinder sleeve 1501, the plunger A 33 is connected with the left cylinder sleeve 1501 in a clearance fit through a piston ring 31, an inlet one-way valve 35 and an outlet one-way valve 32 are arranged on the left side of the left cylinder sleeve 1501, a pump head 34 is connected with the left end face of the left cylinder sleeve 1501 through threads and a sealing ring, a compression spring 29 is arranged between the pump head 34 and the plunger A 33, and the compression spring 29 is used for resetting the plunger A 33;

[0030] Similarly, a right cylinder sleeve 1502 is arranged on the right side of the pump body 15, and a plunger B 30 is arranged in the right cylinder sleeve 1502;

[0031] A motor 39 is mounted on the outer side of the center of the pump body 15, an output shaft 20 of the motor 39 extends into the pump body 15, a front shaft 2001 is connected with the front end of the output shaft 20 through bolts, a shaft sleeve 2002 is sleeved between the output shaft 20 and the front shaft 2001, the output shaft 20, the front shaft 2001 and the shaft sleeve 2002 are fixedly connected in the axial and radial directions through a flat key 23, a cam A 18 is arranged on the front shaft 2001, a cam B 19 is arranged on the shaft sleeve 2002, a flat thrust bearing is arranged between the cam B 19 and the output shaft 20, a flat thrust bearing is arranged between the cam B 19 and the cam A 18, the cam A 18 is connected with the front shaft 2001 through a flat thrust bearing, the cam A 18 can freely rotate with the shaft sleeve 2002 and the output shaft 20, the cam B 19 can freely rotate with the front shaft 2001 and the cam A 18,

[0032] The front shaft 2001 and the cam A 18 are connected through a one-way rotation assembly, and the shaft sleeve 2002 and the cam B 19 are connected through a one-way rotation assembly;

[0033] The single-rotation assembly structure is the same, taking the single-rotation assembly of the cam B19 and the shaft sleeve 2002 as an example: the single-rotation assembly is six, arranged uniformly along the circumference of the shaft sleeve 2002, each single-rotation assembly includes a torsion plate 22, the torsion plate 22 is arranged in parallel along the axis of the shaft sleeve 2002, the torsion plate 22 is provided with a cantilever shaft 25 on both sides, the two cantilever shafts 25 are each rotationally connected with an ear plate 26, the ear plate 26 is welded on the outer circle of the shaft sleeve 2002, and a torsion spring 24 is sleeved on one of the cantilever shafts 25, one side of the torsion spring 24 is fixed on the torsion plate 22, and the other side is fixed on the ear plate 26, so that the torsion plate 22 on the shaft sleeve 2002 faces the counterclockwise direction, and the torsion plate 22 on the front shaft 2001 faces the clockwise direction, and the inner holes of the cams A18 and B19 are each provided with a strip-shaped groove 21, when the torsion plate 22 is opened outward, the torsion plate 22 is inserted into the strip-shaped groove 21, and when the cam A18 rotates, the plunger A33 can be pushed to move, and when the cam B19 rotates, the plunger B30 can be pushed to move.

[0034] The double-drive pump 5 is provided with a single-rotation assembly in the cams A18 and B19, the motor 39 is rotated in the positive direction and the reverse direction, respectively drives the cams A18 and B19 to rotate, respectively drives the reciprocating plunger pump A16 and the reciprocating plunger pump B17 to operate, saves one motor 39, and can also prevent misoperation caused by the installation of two motors 39 for driving.

[0035] The ring network box 2 is provided with an oxygen consumption assembly 14, the oxygen consumption assembly 14 includes a seat plate 1401, the seat plate 1401 is connected to the inner wall of the ring network box 2 through bolts, the outer side of the seat plate 1401 is connected to a pressing plate 1402 through a guide rail 1403, the inner side of the pressing plate 1402 is provided with a guide column 1406, the outer side of the seat plate 1401 is provided with a guide sleeve 1405, the guide column 1406 and the guide sleeve 1405 are in sliding connection, the outer side of the guide column 1405 is sleeved with an electromagnetic coil 1407, the guide column 1406 is made of carbon steel, the guide sleeve 1405 is made of aluminum metal, the inner side of the pressing plate 1402 is provided with a steel spike 1404, and the steel spike 1404 and the seat plate 1401 are provided with oxygen isolation packaged deoxidizers (not shown in the figure).

[0036] The sealing door 3 is provided with an opening door button 301 and a closing door button 302.

[0037] The nitrogen capsule 7 is filled with good nitrogen, before the sealing door 3 is opened, the opening door button 301 is pressed, the double-drive pump 5 is rotated, the reciprocating plunger pump B17 is driven to operate, at the same time, the electromagnetic valve A36 is opened and the electromagnetic valve B37 is closed, the nitrogen in the ring network box 2 is sucked into the nitrogen capsule 7 by the reciprocating plunger pump B17, the nitrogen capsule 7 is expanded to extrude the air capsule 6, the air in the air capsule 6 is discharged from the air discharge pipe 9 into the ring network box 2, the nitrogen recovery is completed, and the oxygen consumption assembly 14 is replaced with oxygen isolation packaged deoxidizers at the same time;

[0038] After closing the sealing door 3, press the door closing button 302, the double drive pump 5 rotates, drives the reciprocating plunger pump A16 to run, at the same time, opens the electromagnetic valve B37, closes the electromagnetic valve A36, the reciprocating plunger pump A16 sucks the air in the ring net box 2 into the air capsule 6, the air capsule 6 expands and squeezes the nitrogen capsule 7, the nitrogen in the nitrogen capsule 7 is discharged from the nitrogen discharge pipe 11 into the ring net box 2, and the displacement of air is completed. Since the air in the ring net box 2 cannot be completely displaced, the electromagnetic coil 1407 is energized at this time, the electromagnetic coil 1407 attracts the guide column 1406, drives the pressing plate 1402 to move towards the base plate 1401, the steel needle 1404 pierces the oxygen barrier packaging layer of the deoxidizer, the deoxidizer consumes the remaining oxygen in the ring net box 2, and the process of filling nitrogen in the ring box is completed.

[0039] The present application drives the reciprocating plunger pump B17 to run through the double drive pump 5, completes the nitrogen recovery before the sealing door 3 is opened for maintenance, and drives the reciprocating plunger pump A16 to run through the double drive pump 5 after the door is closed, completes the displacement of nitrogen, and releases the nitrogen into the ring net box 2. Through the setting of the oxygen consumption assembly 14, the remaining oxygen in the ring net box 2 is consumed, that is, the ring net box 2 is completely filled with nitrogen, which not only guarantees insulation but also completes nitrogen supplement.

[0040] The outer circle of the cam A18 and the cam B19 is provided with uniformly distributed balls 28, so that the rolling friction is formed between the cam A18 and the plunger A33, and the rolling friction is formed between the cam B19 and the plunger B30, thereby reducing energy consumption.

Claims

1. An environmentally friendly gas-insulated ring main unit, comprising an airtight box (38), a drive box (1), and a ring main unit (2), characterized in that: An airtight box (38) is installed on the upper part of the drive box (1), the drive box (1) is installed on the upper part of the ring network box (2), the ring network box (2) is equipped with a sealing door (3), and a functional module (4) is installed inside the ring network box (2); An airtight box (38) is equipped with an air capsule (6) and a nitrogen capsule (7). The nitrogen capsule (7) is located on the right side, and the air capsule (6) is located on the left side. A dual-drive pump (5) is installed in the drive box (1). A reciprocating plunger pump A (16) and a reciprocating plunger pump B (17) are respectively installed on the left and right sides of the dual-drive pump (5). The inlet of the reciprocating plunger pump A (16) is connected to an air intake pipe (8). The air intake pipe (8) extends to the bottom of the ring network box (2) and connects to an air intake manifold (13). The air intake manifold (13) has evenly distributed vent holes. The outlet of the reciprocating plunger pump A (16) has a pipe connected to the air capsule (6). 6) Connecting, an air exhaust pipe (9) is provided between the air capsule (6) and the ring network box (2), an electromagnetic valve A (36) is installed on the air exhaust pipe (9), the inlet of the reciprocating plunger pump B (17) is connected to the nitrogen suction pipe (10), the nitrogen suction pipe (10) extends to the upper part of the ring network box (2) and is connected to the nitrogen suction hood (12), the outlet of the reciprocating plunger pump B (17) is connected to the nitrogen capsule (7), a nitrogen exhaust pipe (11) is provided between the nitrogen capsule (7) and the ring network box (2), an electromagnetic valve B (37) is installed on the nitrogen exhaust pipe (11), and a nitrogen detector (27) is provided inside the ring network box (2); The dual-drive pump (5) includes a pump body (15), a reciprocating plunger pump A (16) and a reciprocating plunger pump B (17) are symmetrically arranged on both sides of the pump body (15). The reciprocating plunger pump A (16) and the reciprocating plunger pump B (17) have the same structure. Taking the reciprocating plunger pump A (16) as an example: a left cylinder liner (1501) is provided on the left side of the pump body (15), and a plunger A (33) is provided inside the left cylinder liner (1501). The plunger A (33) is connected to the left cylinder liner (1501) through a piston ring (31) with a clearance fit. An inlet check valve (35) and an outlet check valve (32) are provided on the left side of the left cylinder liner (1501). The left end face of the left cylinder liner (1501) is connected to the pump head (34) through a thread and a sealing ring. A compression spring (29) is provided between the pump head (34) and the plunger A (33). Similarly, a right cylinder liner (1502) is provided on the right side of the pump body (15), and a plunger B (30) is provided inside the right cylinder liner (1502); A motor (39) is installed on the outer side of the center of the pump body (15). The output shaft (20) of the motor (39) extends into the pump body (15). The front end of the output shaft (20) is connected to the front shaft (2001) by bolts. A bushing (2002) is fitted between the front shaft (2001) and the output shaft (20). The output shaft (20), the front shaft (2001), and the bushing (2002) are connected by a flat key (23). A cam A (18) is provided on the front shaft (2001). The bushing (2002) is provided with a cam B (19), a planar thrust bearing is provided between the cam B (19) and the output shaft (20), a planar thrust bearing is provided between the cam B (19) and the cam A (18), the cam A (18) and the front shaft (2001) are connected by the planar thrust bearing, the front shaft (2001) and the cam A (18) are connected by a one-way rotation assembly, and the bushing (2002) and the cam B (19) are connected by a one-way rotation assembly. The unidirectional rotation components have the same structure. Taking the unidirectional rotation components of cam B (19) and bushing (2002) as an example: there are six unidirectional rotation components, which are evenly arranged along the circumference of bushing (2002). Each unidirectional rotation component includes a torsion plate (22). The torsion plate (22) is arranged parallel to the axis of bushing (2002). There are cantilever shafts (25) on both sides of the torsion plate (22). Each of the two cantilever shafts (25) is rotatably connected to an ear plate (26). The ear plate (26) is welded to the outer circle of bushing (2002). A torsion spring (24) is sleeved on one of the cantilever shafts (25). One side of the torsion spring (24) is fixed on the torsion plate (22) and the other side is fixed on the ear plate (26), so that the torsion plate (22) on the sleeve (2002) faces the counterclockwise direction and the torsion plate (22) on the front axle (2001) faces the clockwise direction. The inner holes of cam A (18) and cam B (19) are both opened with strip grooves (21). When the torsion plate (22) opens outward, the torsion plate (22) is inserted into the strip groove (21). When cam A (18) rotates, it can push the plunger A (33) to move. When cam B (19) rotates, it can push the plunger B (30) to move.

2. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: The ring network box (2) is equipped with an oxygen-consuming component (14). The oxygen-consuming component (14) includes a base plate (1401). The base plate (1401) is bolted to the inner wall of the ring network box (2). The outer side of the base plate (1401) is connected to the pressure plate (1402) via a guide rail (1403). The inner side of the pressure plate (1402) is equipped with a guide post (1406). The outer side of the base plate (1401) is equipped with a guide sleeve (1405). The guide post (1406) and the guide sleeve (1405) are slidably connected. An electromagnetic coil (1407) is sleeved on the outer side of the guide post (1405). The guide post (1406) is made of carbon steel, and the guide sleeve (1405) is made of aluminum. The inner side of the pressure plate (1402) is equipped with a steel spike (1404). An oxygen absorber with an oxygen-barrier package is installed between the steel spike (1404) and the base plate (1401).

3. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: The sealed door (3) is equipped with an opening button (301) and a closing button (302).

4. The environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: The outer circles of cam A (18) and cam B (19) are provided with evenly distributed balls (28).

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