Environment-friendly gas insulation switch cabinet

Abstract

The invention discloses an environment-friendly gas insulation switch cabinet which comprises a cabinet body composed of a cable chamber, an operation mechanism chamber and an insulation gas box. A fully-sealed environment-friendly inner switch is arranged in the insulating gas tank and comprises a circuit breaker frame, a three-station isolating rotating shaft, a static contact mounting seat and a grounding contact mounting seat are mounted on the circuit breaker frame, the static contact mounting seat is positioned above the isolating rotating shaft, and the grounding contact mounting seat is positioned on the front side of the isolating rotating shaft; a plurality of isolation rotating arms are arranged on the isolation rotating shaft, and an isolation tool bit is arranged at the front end of each isolation rotating arm; the static contact mounting seat is provided with a static contact corresponding to the isolation tool bit, and the grounding contact mounting seat is provided with a grounding contact corresponding to the isolation tool bit. The environment-friendly gas insulation switch cabinet can be stably switched at an isolation closing position, an isolation separating position or a grounding closing position, and safety and reliability of circuit operation are guaranteed.

Description

Technical Field

[0001] This disclosure relates to the field of electrical equipment technology, and in particular to an environmentally friendly gas-insulated switchgear. Background Technology

[0002] Gas-insulated switchgear uses a gas with high insulation strength and high arc-extinguishing capability as the arc-extinguishing medium. It utilizes the insulating gas to establish a good insulating environment within a sealed gas chamber, enabling the internal primary high-voltage components to operate safely within a relatively small space. The cabinet of a high-voltage switchgear typically contains a primary switch compartment, an instrumentation and mechanism compartment, and a cable compartment. The primary switch compartment has an upper busbar connecting to the outside of the high-voltage switchgear and a lower busbar connecting to the cable compartment. Primary components such as the upper busbar, disconnecting switches, circuit breakers, lower busbar, grounding switches, grounding busbars, and load switches are usually located in the primary switch compartment.

[0003] However, traditional gas-insulated switchgear typically uses sulfur hexafluoride (SF6) gas as both insulation and arc-quenching medium. While SF6 gas has excellent properties, it is a highly potent greenhouse gas with an extremely high global warming potential (GWP), and leaks would cause severe environmental damage. Furthermore, existing gas-insulated switchgear suffers from problems such as inefficient layout, complex connections between operating mechanisms and internal switches, and inconvenient maintenance, making it difficult to meet the current comprehensive requirements of power equipment for environmental protection, safety, and economy. Therefore, developing a gas-insulated switchgear with superior environmental performance, a compact structure, and convenient operation has become an urgent problem to be solved in the power equipment field. Summary of the Invention

[0004] The purpose of this disclosure is to provide an environmentally friendly gas-insulated switchgear that can stably switch between the isolating closed, isolating open, or grounding closed positions, ensuring the safety and reliability of circuit operation. The isolating swing arm adopts a hollow structure, which not only reduces weight but also optimizes internal heat dissipation; the special design of the isolating blade enhances conductivity and insulation performance.

[0005] This disclosure provides an environmentally friendly gas-insulated switchgear, including a cabinet, which comprises a cable compartment, an operating mechanism compartment, and an insulating gas box; the operating mechanism compartment and the insulating gas box are located above the cable compartment, and the operating mechanism compartment is located in front of the insulating gas box; both the operating mechanism compartment and the cable compartment are provided with corresponding cabinet doors;

[0006] The insulating gas box contains a fully enclosed environmentally friendly internal switch. The fully enclosed environmentally friendly internal switch includes a circuit breaker frame. The circuit breaker frame is equipped with a three-position isolating shaft, a stationary contact mounting base, and a grounding contact mounting base. The stationary contact mounting base is located above the isolating shaft, and the grounding contact mounting base is located in front of the isolating shaft. The isolating shaft is provided with multiple isolating arms, and each isolating arm has an isolating blade at its front end. The stationary contact mounting base has a stationary contact corresponding to the isolating blade, and the grounding contact mounting base has a grounding contact corresponding to the isolating blade.

[0007] Furthermore, the circuit breaker frame includes a pair of side plates, and the isolating shaft, stationary contact mounting base, and grounding contact mounting base are all installed between the pair of side plates; the isolating arm is configured to rotate in a vertical plane driven by the isolating shaft, so that the fully enclosed environmentally friendly internal switch is in the isolating closed position, the isolating open position, or the grounding closed position.

[0008] Furthermore, the isolation rotating arm has a hollow structure; the isolation blade includes an insulating block fitted into the front opening of the isolation rotating arm and a pair of connecting rods located on both sides of the insulating base, the connecting rods being fixed to the insulating base by fastening knobs; conductive contacts are provided on the opposite surfaces of the connecting rods.

[0009] Furthermore, the fully sealed environmentally friendly internal switch also includes a rotating shaft mounting base, a sealed pole post, and a pole post rotating shaft. The rotating shaft mounting base is installed between the pair of side plates and is located below the grounding contact mounting base. The pole post rotating shaft is rotatably mounted on the rotating shaft mounting base.

[0010] Furthermore, the solid-sealing pole corresponds one-to-one with the isolation rotating arm and is located below the isolation rotating arm; a rotating seat is provided on the pole shaft, one end of the solid-sealing pole is hinged to the end of the connecting rod, and the other end passes through the through hole opened on the rotating shaft mounting plate and is hinged to the rotating seat.

[0011] Furthermore, the rotating shaft mounting base is also provided with multiple fixing plates, each fixing plate having a locking hole; the pole shaft passes through the locking holes of the multiple fixing plates.

[0012] Furthermore, the operating mechanism chamber is equipped with an isolation operating mechanism and a circuit breaker operating mechanism. The isolation operating mechanism is used to control the rotation of the isolation shaft, and the circuit breaker operating mechanism is used to control the rotation of the pole shaft.

[0013] Furthermore, the insulating gas box is also provided with multiple pairs of side expansion sleeves, which are located above the fully sealed environmental protection internal switch and are symmetrically installed on opposite side walls of the insulating gas box; conductive components are inserted into the side expansion sleeves, and the conductive components are connected to the stationary contact through a bus connector.

[0014] Furthermore, the insulating gas box is also equipped with multiple outlet connectors, and the multiple outlet connectors are connected to the solid-sealed poles one by one through outlet sleeves.

[0015] Furthermore, the cabinet also includes an instrument compartment, which is located above the operating mechanism compartment.

[0016] This disclosure can achieve at least the following technical effects:

[0017] 1. The environmentally friendly gas-insulated switchgear provided by this invention comprises a cable compartment, an operating mechanism compartment, an insulating gas box, and an instrument compartment. The layout of each compartment is reasonable, facilitating equipment installation, operation, and maintenance. The operating mechanism compartment and cable compartment are equipped with corresponding cabinet doors, allowing maintenance personnel to easily inspect and repair internal components. The instrument compartment is located above the operating mechanism compartment, facilitating centralized monitoring and control of power parameters.

[0018] 2. The environmentally friendly gas-insulated switchgear provided by this invention adopts a fully enclosed environmentally friendly internal switch, eliminating the use of traditional SF6 gas and avoiding the environmental hazards caused by greenhouse gas leaks, thus conforming to the concept of green and environmentally friendly development. The structural design of the fully enclosed environmentally friendly internal switch is also highly advantageous. The three-position isolating shaft, stationary contact mounting base, and grounding contact mounting base installed on the circuit breaker frame, along with the isolating arm, isolating blade, stationary contact, and grounding contact, enable the fully enclosed environmentally friendly internal switch to stably switch between the isolating closed, isolating open, and grounding closed positions, ensuring the safety and reliability of circuit operation. The isolating arm adopts a hollow structure, which not only reduces weight but also optimizes internal heat dissipation; the special design of the isolating blade enhances conductivity and insulation performance.

[0019] 3. The environmentally friendly gas-insulated switchgear provided by this invention has an isolation operating mechanism and a circuit breaker operating mechanism in the operating mechanism room, which respectively and precisely control the rotation of the isolation shaft and the pole shaft, making the switch operation more flexible and accurate; the side expansion bushing, conductive parts, bus connector, outgoing line connector and outgoing line bushing and other components set in the insulating gas box optimize the power transmission path and improve the power transmission efficiency and stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the environmentally friendly gas-insulated switchgear of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the gas box;

[0022] Figure 3 A schematic diagram of the structure of a fully enclosed environmentally friendly internal switch;

[0023] Figure 4 A structural schematic diagram of a fully enclosed environmentally friendly internal switch from another perspective;

[0024] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 6 A schematic diagram of the internal structure of the cable room and the operating mechanism room;

[0026] Explanation of the numbers in the diagram: 100, cabinet; 110, cable compartment; 120, operating mechanism compartment; 130, insulating gas box; 140, instrument compartment; 150, cabinet door;

[0027] 200. Fully enclosed environmentally friendly internal switch; 210. Circuit breaker frame; 211. Side plate; 220. Isolation shaft; 221. Isolation arm; 230. Isolation blade; 231. Insulating base; 232. Connecting rod; 233. Contact; 234. Fastening knob; 240. Stationary contact mounting base; 241. Stationary contact; 250. Grounding contact mounting base; 251. Grounding contact; 260. Shaft mounting base; 261. Fixing plate; 270. Pole shaft; 271. Rotating base; 280. Enclosed pole;

[0028] 300. Side expansion sleeve; 310. Conductive component; 320. Busbar connector;

[0029] 400. Outgoing cable connector; 410. Outgoing cable sleeve;

[0030] 510. Isolation operating mechanism; 520. Circuit breaker operating mechanism. Detailed Implementation

[0031] The technical solutions of this disclosure will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] As attached Figure 1As shown, this disclosure provides an environmentally friendly gas-insulated switchgear, including a cabinet 100. The cabinet 100 comprises a cable compartment 110, an operating mechanism compartment 120, an insulating gas box 130, and an instrument compartment 140. The operating mechanism compartment 120 and the insulating gas box 130 are located above the cable compartment 110, with the operating mechanism compartment 120 positioned in front of the insulating gas box 130. The instrument compartment 140 is located above the operating mechanism compartment 120. Each of the operating mechanism compartment 120, cable compartment 110, and instrument compartment 140 has a corresponding cabinet door 150.

[0033] Please see Figure 3-4 An insulating gas box 130 contains a fully enclosed environmentally friendly internal switch 200. The fully enclosed environmentally friendly internal switch 200 includes a circuit breaker frame 210, on which a three-position isolating shaft 220, a stationary contact mounting base 240, and a grounding contact mounting base 250 are mounted. The circuit breaker frame 210 consists of a pair of vertical side plates 211, and the three-position isolating shaft 220 is mounted between the pair of side plates 211. The isolating shaft 220 has multiple isolating arms 221, and each isolating arm 221 has an isolating blade 230 at its front end. In some embodiments, the isolating shaft 220 has three isolating arms 221, which are integrally formed with the isolating shaft 220. Preferably, the isolating shaft 220 and the isolating arms 221 are cast from plastic.

[0034] Please see Figure 3-4 The stationary contact mounting base 240 is located above the isolation shaft 220 and is mounted between a pair of side plates 211. The stationary contact mounting base 240 is provided with stationary contacts 241 that correspond one-to-one with the isolation blades 230. The grounding contact mounting base 250 is located on the front side of the isolation shaft 220 and is mounted between a pair of side plates 211. The grounding contact mounting base 250 is provided with grounding contacts 251 that correspond one-to-one with the isolation blades 230.

[0035] Please see Figure 5 The isolating rotating arm 221 has a hollow structure, and the isolating blade 230 is installed at the front end of the isolating rotating arm 221. Specifically, the isolating blade 230 includes an insulating stop block fitted into the front opening of the isolating rotating arm 221 and a pair of connecting rods 232 located on both sides of the insulating base 231. The pair of connecting rods 232 are fixed to the insulating base 231 by a fastening knob 234, and their other ends extend into the interior of the isolating rotating arm 221 and protrude from the end of the isolating rotating arm 221. Conductive contacts 233 are provided on the opposite surfaces of the connecting rods 232 to communicate with the stationary contact 241 or the grounding contact 251.

[0036] In this invention, the isolation arm 221 is configured to rotate in a vertical plane driven by the isolation shaft 220, so that the fully enclosed environmentally friendly internal switch 200 is in the isolation closed position, the isolation open position, or the grounding closed position. The fully enclosed environmentally friendly internal switch 200 also includes a shaft mounting base 260, a solid-state pole 280, and a pole shaft 270. The shaft mounting base 260 is mounted between a pair of side plates 211 and located below the grounding contact mounting base 250. The pole shaft 270 is rotatably mounted on the shaft mounting base 260. In some embodiments, the shaft mounting base 260 is provided with multiple fixing plates 261, each fixing plate 261 having a locking hole. The pole shaft 270 passes through the locking holes of the multiple fixing plates 261, thereby rotatably mounting itself on the shaft mounting base 260.

[0037] Please see Figure 3 The fixed-seal pole 280 corresponds one-to-one with the isolation rotating arm 221 and is located below the isolation rotating arm 221. The pole shaft 270 is provided with a rotating seat 271. One end of the fixed-seal pole 280 is hinged to the connecting rod 232 above, and the other end passes through the through hole opened on the rotating shaft mounting plate and is hinged to the rotating seat 271.

[0038] Please see Figure 6 In this invention, the operating mechanism chamber 120 is further equipped with an isolation operating mechanism 510 and a circuit breaker operating mechanism 520. The isolation operating mechanism 510 is used to control the rotation of the isolation shaft 220, thereby controlling the fully enclosed environmentally friendly internal switch 200 to be in the isolation closed position, isolation open position, or grounding closed position. The circuit breaker operating mechanism 520 is used to control the rotation of the pole shaft 270, and then converts the rotational motion of the pole shaft 270 into linear motion, driving the arc-extinguishing chamber inside the solid-sealed pole 280 to achieve the opening and closing operation.

[0039] Please see Figure 2 In this invention, the insulating gas box 130 is further provided with multiple pairs of side-expansion sleeves 300, which serve to conduct electricity, provide insulation, and extend connections. Preferably, the multiple pairs of side-expansion sleeves 300 are located above the fully enclosed environmentally friendly internal switch 200 and are symmetrically installed on opposite side walls of the insulating gas box 130. Conductive components 310 are inserted into the side-expansion sleeves 300, and these conductive components 310 are connected to the stationary contact 241 through a bus connector 320.

[0040] Please see Figure 2 In this invention, the insulating gas box 130 is also provided with a plurality of outgoing connectors 400. The front end of each outgoing connector 400 is inserted into the cable chamber 110, and the outside of each outgoing connector 400 is wrapped with an insulating sleeve. Each outgoing connector 400 is connected to the solid-sealed pole 280 through an outgoing sleeve 410.

[0041] The environmentally friendly gas-insulated switchgear provided by this invention adopts a fully enclosed environmentally friendly internal switch 200, eliminating the use of traditional SF6 gas and avoiding the environmental hazards caused by greenhouse gas leaks, thus conforming to the concept of green and environmentally friendly development. The structural design of the fully enclosed environmentally friendly internal switch 200 is also highly advantageous. The three-position isolation shaft 220, stationary contact mounting base 240, and grounding contact mounting base 250 installed on the circuit breaker frame 210, together with the isolation arm 221, isolation blade 230, stationary contact 241, and grounding contact 251, enable the fully enclosed environmentally friendly internal switch 200 to stably switch between the isolation closed, isolation open, and grounding closed positions, ensuring the safety and reliability of circuit operation. The isolation arm 221 adopts a hollow structure, which not only reduces weight but also optimizes internal heat dissipation; the special design of the isolation blade 230 enhances conductivity and insulation performance.

[0042] In summary, although the present disclosure has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present disclosure. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the scope defined in the claims.

Claims

1. An environmentally friendly gas-insulated switchgear, characterized in that, The system includes a cabinet, which comprises a cable compartment, an operating mechanism compartment, and an insulating gas box. The operating mechanism compartment and the insulating gas box are located above the cable compartment, with the operating mechanism compartment located in front of the insulating gas box. Both the operating mechanism compartment and the cable compartment have corresponding cabinet doors. The insulating gas box contains a fully enclosed environmentally friendly internal switch. The fully enclosed environmentally friendly internal switch includes a circuit breaker frame. The circuit breaker frame is equipped with a three-position isolating shaft, a stationary contact mounting base, and a grounding contact mounting base. The stationary contact mounting base is located above the isolating shaft, and the grounding contact mounting base is located in front of the isolating shaft. The isolating shaft is provided with multiple isolating arms, and each isolating arm has an isolating blade at its front end. The stationary contact mounting base has a stationary contact corresponding to the isolating blade, and the grounding contact mounting base has a grounding contact corresponding to the isolating blade.

2. The environmentally friendly gas-insulated switchgear as described in claim 1, characterized in that, The circuit breaker frame includes a pair of side plates, and the isolating shaft, stationary contact mounting base and grounding contact mounting base are all installed between the pair of side plates; the isolating arm is configured to rotate in a vertical plane driven by the isolating shaft, so that the fully enclosed environmentally friendly internal switch is in the isolating closed position, the isolating open position or the grounding closed position.

3. The environmentally friendly gas-insulated switchgear as described in claim 1, characterized in that, The isolation rotating arm has a hollow structure; the isolation blade includes an insulating block fitted into the front opening of the isolation rotating arm and a pair of connecting rods located on both sides of the insulating base. The connecting rods are fixed to the insulating base by fastening knobs; conductive contacts are provided on the opposite surfaces of the connecting rods.

4. The environmentally friendly gas-insulated switchgear as described in claim 1, characterized in that, The fully sealed environmentally friendly internal switch also includes a rotating shaft mounting base, a sealed pole post, and a pole post rotating shaft. The rotating shaft mounting base is installed between the pair of side plates and is located below the grounding contact mounting base. The pole post rotating shaft is rotatably mounted on the rotating shaft mounting base.

5. The environmentally friendly gas-insulated switchgear as described in claim 4, characterized in that, The solid-sealing pole corresponds one-to-one with the isolation rotating arm and is located below the isolation rotating arm; a rotating seat is provided on the pole shaft, one end of the solid-sealing pole is hinged to the end of the connecting rod, and the other end passes through the through hole opened on the rotating shaft mounting plate and is hinged to the rotating seat.

6. The environmentally friendly gas-insulated switchgear as described in claim 4, characterized in that, The rotating shaft mounting base is also provided with multiple fixing plates, each fixing plate having a locking hole; the pole shaft passes through the locking holes of the multiple fixing plates.

7. The environmentally friendly gas-insulated switchgear as described in claim 1, characterized in that, The operating mechanism room is equipped with an isolation operating mechanism and a circuit breaker operating mechanism. The isolation operating mechanism is used to control the rotation of the isolation shaft, and the circuit breaker operating mechanism is used to control the rotation of the pole shaft.

8. The environmentally friendly gas-insulated switchgear as described in claim 1, characterized in that, The insulating gas box is also equipped with multiple pairs of side expansion sleeves, which are located above the fully sealed environmental protection internal switch and are symmetrically installed on opposite side walls of the insulating gas box. Conductive components are inserted into the side expansion sleeves, and the conductive components are connected to the stationary contact through a bus connector.

9. An environmentally friendly gas-insulated switchgear as described in claim 4, characterized in that, The insulating gas box is also equipped with multiple outgoing connectors, and the multiple outgoing connectors are connected to the solid-sealed poles one by one through outgoing sleeves.

10. The environmentally friendly gas-insulated switchgear as described in claim 1, characterized in that, The cabinet also includes an instrument compartment, which is located above the operating mechanism compartment.

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