Compact environment-friendly gas insulation switch cabinet

Abstract

The invention relates to the technical field of high-voltage power transmission and distribution, in particular to a compact environment-friendly gas insulation switch cabinet which comprises a cabinet body, an instrument assembly and a switch assembly. A cabinet door is installed at an opening of the cabinet body, and a partition plate is connected in the cabinet body and divides the cabinet body into a first cavity and a second cavity; a first sub-plate and a second sub-plate are arranged in the second cavity of the cabinet body, the first sub-plate is vertically connected to the higher side of the partition plate, the second sub-plate is parallelly connected to the side, close to the bottom of the cabinet body, of the first sub-plate, the first sub-plate and the cabinet body form a containing area for containing the instrument assembly, and the instrument assembly is connected with the switch assembly; the switch assembly comprises a gas insulation switch, the gas insulation switch comprises a connection switch device, the connection switch device comprises an isolation switch main shaft and a movable contact knife assembly, and the isolation switch main shaft drives the movable contact knife assembly to be in contact with or separated from an isolation switch static contact; the compact type environment-friendly gas insulation cabinet has the effect that the standard requirement of the compact type environment-friendly gas insulation cabinet is difficult to meet.

Description

Technical Field

[0001] This application relates to the field of high-voltage power transmission and distribution technology, and in particular to a compact, environmentally friendly gas-insulated switchgear. Background Technology

[0002] With the continuous development of the power industry, higher requirements have been put forward for the performance, space occupation and environmental protection of high-voltage power transmission and distribution equipment. Gas-insulated switchgear can effectively ensure the stability and safety of power transmission, and its application scope is becoming wider and wider. It can isolate high-voltage equipment from the external environment, avoid the influence of external factors on the equipment, and prevent the equipment from causing harm to the surrounding environment. In projects such as urban power grid transformation and industrial plant construction, it provides strong support for the reliable operation of the power system.

[0003] In existing technologies, traditional 10kV high-voltage power transmission and distribution environmentally friendly gas-insulated switchgear typically relies on conventional transmission crank arms for opening and closing operations. This structure is a common mechanical transmission method widely used in many similar switchgear devices. Furthermore, the gas tank side panels of traditional cabinets are designed with a uniform thickness. To meet the installation strength and insulation requirements of the bus tie socket bushing, the overall thickness of the side panels needs to be maintained at a relatively high level. Additionally, the layout of the circuit breaker main shaft crank arm and the copper rod contact head in traditional cabinets is also set in a conventional manner. These traditional designs and technologies have met certain usage requirements for a period of time and have been widely used in the field of high-voltage power transmission and distribution.

[0004] Regarding the aforementioned technologies, traditional 10kV high-voltage power transmission and distribution gas-insulated switchgear generally suffers from excessive size. The traditional transmission crank arm on which the internal gas-insulated switch relies not only occupies a lot of space but also results in the disconnector switch spindle being installed too high, further increasing the overall height of the cabinet. The uniform thickness design of the side panels of the gas box in traditional cabinets limits the distance between the side panels and the internal switch components, making it impossible to further compress the cabinet volume and meet the standard requirements for compact environmentally friendly gas-insulated switchgear. Summary of the Invention

[0005] To address the issue of difficulty in meeting the standard requirements for compact environmentally friendly gas-insulated switchgear, this application provides a compact environmentally friendly gas-insulated switchgear.

[0006] The compact, environmentally friendly gas-insulated switchgear provided in this application adopts the following technical solution: A compact, environmentally friendly gas-insulated switchgear includes a cabinet body, an instrument assembly, and a switch assembly. The cabinet body is hollow, with an opening on one side wall. A cabinet door is installed at the opening. A stepped partition is connected inside the cabinet body, perpendicular to the side wall of the cabinet body. The partition divides the cabinet body into a first chamber and a second chamber. A first sub-plate and a second sub-plate are provided in the second chamber. The first sub-plate is vertically connected to the higher side of the partition and is perpendicular to the cabinet door. The second sub-plate is parallel to the first sub-plate near the bottom of the cabinet body. The first sub-plate and the cabinet body form a receiving area for accommodating the instrument assembly. The instrument assembly is connected to the partition and to the switch assembly. The first chamber forms a placement area for placing the switch assembly, which includes a gas-insulated switch. The gas-insulated switch includes a connecting switch device, which includes a disconnecting switch spindle and a moving contact assembly. The disconnecting switch spindle is connected to the moving contact assembly, and the disconnecting switch spindle directly drives the moving contact assembly to contact or separate from the stationary contact of the disconnecting switch.

[0007] By adopting the above technical solution, the cabinet body is hollowed out and equipped with cabinet doors and partitions, dividing the cabinet body into two chambers, thus achieving sealing and protection of the internal components. The first and second partitions form a receiving area and a placement area, rationally planning the placement space for instrument components and switch components. In the gas-insulated switch connection device, the disconnecting switch spindle directly drives the moving contact knife assembly, eliminating the traditional transmission crank arm, reducing the lateral volume, simplifying the transmission structure, reducing failure points, and improving the reliability of switch operation. At the same time, it lowers the installation position of the disconnecting switch spindle, which helps to reduce the overall height of the cabinet, realize the compact design of the switch cabinet, and help improve the problem of not being able to meet the standard requirements of compact environmentally friendly gas-insulated cabinets.

[0008] In one specific implementation, the switch assembly further includes an isolation mechanism and a circuit breaker mechanism, both of which are connected to the first sub-board. The isolation mechanism is used to isolate the circuit, and the circuit breaker mechanism is used to disconnect and connect the circuit. The gas-insulated switch also includes a disconnector stationary contact, an arc-extinguishing chamber assembly, and a circuit breaker operating spindle. The disconnector stationary contact is electrically connected to the disconnecting mechanism, and the circuit breaker mechanism is drivenly connected to the circuit breaker operating spindle. The disconnector stationary contact and the connecting switch device are both connected to the arc-extinguishing chamber assembly, and the arc-extinguishing chamber assembly is connected to the disconnector spindle.

[0009] By adopting the above technical solutions, the isolation mechanism can achieve circuit isolation, ensuring the safety of personnel and equipment during maintenance or repair; the circuit breaker mechanism can cut off and connect the circuit, protecting the power system from the influence of fault current; the stationary contact of the disconnecting switch is electrically connected to the isolation mechanism and can cooperate with the moving contact assembly to realize circuit switching; the arc-extinguishing chamber mounting base plays a role in fixing and supporting the stationary contact of the disconnecting switch and connecting the switching device; the circuit breaker mechanism drives the circuit breaker operating spindle, and cooperates with the connecting switching device to realize the opening and closing operation, forming a complete current transmission path, ensuring the stability of current transmission, and improving the performance and reliability of the equipment.

[0010] In one specific implementation, the connecting switch device further includes a moving contact connecting copper component, a vacuum interrupter, a moving conductive rod of the vacuum interrupter, and a stationary conductive rod of the vacuum interrupter. The moving contact connecting copper component is connected to the vacuum interrupter through the stationary conductive rod of the vacuum interrupter, and the moving conductive rod of the vacuum interrupter is connected to the circuit breaker operating spindle.

[0011] By adopting the above technical solution, the moving contact knife connecting copper component is connected to the vacuum interrupter via the stationary conductive rod of the vacuum interrupter, and the moving conductive rod of the vacuum interrupter is connected to the circuit breaker operating spindle, forming a current transmission path of "disconnector spindle - moving contact knife assembly - moving contact knife connecting copper component - vacuum interrupter - circuit breaker operating spindle". This ensures the stability of current transmission. At the same time, the vacuum interrupter can quickly extinguish the arc during the opening and closing process, ensuring circuit safety. While reducing the longitudinal installation space of the switch assembly, it also improves the performance and reliability of the equipment.

[0012] In one specific implementation scheme, the cabinet body has a rear cabinet panel on the side directly opposite the opening, and the rear cabinet panel is connected to the cabinet body.

[0013] By adopting the above technical solution, the structural stability during cabinet assembly is enhanced.

[0014] In one specific implementation, the cabinet body is provided with multiple female connector sleeves on each of the remaining two opposite side walls that are not connected to the rear cabinet panel, and the multiple female connector sleeves are spaced apart along their length direction near the top side of the cabinet body.

[0015] By adopting the above technical solutions, multiple cabinets can be operated in parallel, improving the flexibility and reliability of power supply.

[0016] In one specific implementation, the cabinet body further includes a cable assembly, wherein a third partition is connected to the second cavity of the cabinet body, the third partition being closer to the lower side of the partition, the third partition being perpendicular to the partition, the third partition being parallel to the cabinet door, and the third partition, the partition, the second partition, and the bottom wall of the cabinet body forming a cable chamber for placing the cable assembly. The cable assembly includes a connecting sleeve that passes through a partition and is connected to the partition, ensuring a sealed connection between the cable and the components inside the cabinet.

[0017] By adopting the above technical solution, the third partition, the partition, and the bottom wall of the cabinet body form a cable compartment for placing cable assemblies, which facilitates the electrical connection between the switch cabinet and the external power grid; the cable door and the cable compartment are detachably connected without interfering with the operation of the cabinet door, which facilitates the installation and maintenance of cables; the connecting sleeve ensures that the cables are sealed to the components inside the cabinet, which can prevent gas leakage.

[0018] In one specific implementation scheme, the circuit breaker operating spindle is provided with a circuit breaker spindle crank arm and a copper rod connecting contact, the circuit breaker spindle crank arm and the copper rod connecting contact are arranged in a non-contact manner, and the circuit breaker spindle crank arm is used to connect to the output end of the circuit breaker mechanism.

[0019] By adopting the above technical solution, the circuit breaker main shaft crank arm and the copper rod contact head are arranged in a non-contact manner to avoid the risk of motion interference. There is no need to reserve an additional safety distance, which reduces the installation space requirement and further reduces the volume of the switch mechanism room. The circuit breaker main shaft crank arm is used to connect to the output end of the circuit breaker mechanism and can drive the circuit breaker operating main shaft to rotate through transmission components such as connecting rods.

[0020] In one specific implementation, an insulating cover is provided on the outside of the stationary contact of the disconnecting switch, and a grounded disconnecting switch grounding contact is provided at the bottom of the stationary contact of the disconnecting switch.

[0021] By adopting the above technical solutions, the insulating cover can increase the insulation margin of the moving contact assembly when the switch is opened, prevent leakage or short circuit and other faults, improve the insulation performance of the switch and reduce the risk of faults caused by insufficient insulation; the grounding design of the grounding contact of the disconnecting switch provides a safety guarantee for the equipment, and can introduce the current to the ground in time when the equipment is abnormal, so as to avoid damage to personnel and equipment.

[0022] In one specific implementation, the circuit breaker operating spindle is further provided with a plurality of creepage devices for separating adjacent connected switching devices, and the plurality of creepage devices extend radially along the circuit breaker operating spindle.

[0023] By adopting the above technical solutions, adjacent connected switching devices are separated to prevent creepage and improve the insulation performance and operational reliability of the equipment.

[0024] In one specific implementation, the third partition, the side away from the cabinet door, the partition, and the cabinet body form a pressure relief chamber. The partition is provided with multiple pressure relief pipes near the pressure relief chamber. The pressure relief pipes are connected to the partition and connect the first chamber and the second chamber. The partition is connected to a pressure relief valve on each of the pressure relief pipes.

[0025] By adopting the above technical solution, the third partition, the partition plate, and the cabinet body form a pressure relief chamber. The pressure relief pipes on the partition plate connect the first chamber and the second chamber, and each pressure relief pipe is connected to a pressure relief valve. When the air pressure inside the cabinet exceeds the set value, the pressure relief valve can be opened by the controller to discharge the high-pressure gas through the pressure relief pipes and the pressure relief chamber to the cabinet body, thereby preventing the cabinet body from bursting and improving the safety of the equipment.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The designed compact environmentally friendly gas-insulated switchgear features a first and second panel forming a receiving and placement area, rationally planning the placement space for instrument components and switch components. In the gas-insulated switchgear connection device, the disconnector switch spindle directly drives the moving contact knife assembly, eliminating the traditional transmission crank arm, reducing the lateral volume, simplifying the transmission structure, reducing failure points, and improving the reliability of switch operation. At the same time, it lowers the installation position of the disconnector switch spindle, which helps to reduce the overall height of the cabinet, achieving a compact design of the switchgear and helping to improve the problem of not being able to meet the standard requirements for compact environmentally friendly gas-insulated switchgear.

[0027] 2. The designed compact environmentally friendly gas-insulated switchgear uses a circuit breaker mechanism to drive the circuit breaker operating spindle, which, together with the connecting switch device, enables opening and closing operations, forming a complete current transmission path. This ensures the stability of current transmission and improves the performance and reliability of the equipment.

[0028] 3. The compact, environmentally friendly gas-insulated switchgear is designed with a cable compartment formed by the third partition, the partition, and the bottom wall of the main body for placing cable assemblies, facilitating electrical connection between the switchgear and the external power grid; the cable door and the cable compartment are detachably connected without interfering with the operation of the cabinet door, making it convenient for cable installation and maintenance; the connecting sleeve ensures a sealed connection between the cable and the components inside the cabinet, preventing gas leakage. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of the compact environmentally friendly gas-insulated switchgear according to an embodiment of this application.

[0030] Figure 2This is a schematic diagram of the structure of the instrument assembly, switch assembly, and cable assembly in this embodiment.

[0031] Figure 3 This is a schematic diagram of the gas-insulated switch from a first-view perspective in this embodiment.

[0032] Figure 4 This is a schematic diagram of the gas-insulated switch from a second perspective in this embodiment.

[0033] Figure 5 This is a cross-sectional view of the gas-insulated switch in this embodiment.

[0034] Figure 6 This is a schematic diagram of the structure of the partition and pressure relief pipe in this embodiment.

[0035] Explanation of reference numerals in the attached drawings: 1. Cabinet body; 11. Bus tie socket sleeve; 12. Rear parallel cabinet panel; 13. Cabinet door; 131. Instrument door; 132. Control door; 133. Cable door; 14. Partition; 141. Pressure relief pipe; 142. Pressure relief valve; 15. First chamber; 16. Second chamber; 17. First sub-panel; 18. Second sub-panel; 19. Third sub-panel; 2. Instrument assembly; 21. Instrument box body; 3. Switch assembly; 31. Isolation mechanism; 32. Circuit breaker mechanism; 33. Gas-insulated switch; 331. 3311. Stationary contact of disconnecting switch; 332. Insulating cover; 333. Arc-extinguishing chamber assembly base; 333. Circuit breaker operating spindle; 3331. Circuit breaker spindle crank arm; 3332. Copper rod connecting contact; 3333. Creep distance device; 334. Connecting switch device; 3341. Disconnecting switch spindle; 3342. Moving contact knife assembly; 3343. Moving contact knife connecting copper part; 3344. Vacuum interrupting chamber; 3345. Vacuum interrupting chamber moving conductive rod; 3346. Vacuum interrupting chamber stationary conductive rod; 4. Cable assembly; 41. Connecting bushing. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0037] This application discloses a compact, environmentally friendly gas-insulated switchgear.

[0038] Reference Figure 1 and Figure 2 A compact environmentally friendly gas-insulated switchgear includes a cabinet body 1, an instrument assembly 2, a switch assembly 3, and a cable assembly 4. The instrument assembly 2, the switch assembly 3, and the cable assembly 4 are all located inside the cabinet body 1. In this embodiment, the environmentally friendly gas-insulated switchgear is a dry gas-insulated switchgear.

[0039] Reference Figure 1 and Figure 2The cabinet body 1 is hollow and serves as the foundation of the entire switchgear, sealing and protecting the internal components. It can be made of high-strength metal materials, such as stainless steel or carbon steel, to ensure sufficient structural strength and sealing. Two opposite side walls of the cabinet body 1 near the top each have multiple bus tie socket sleeves 11. In this embodiment, there are three bus tie socket sleeves 11, spaced apart along their length near the top of the cabinet body 1. The bus tie socket sleeves 11 are installed on the top of the cabinet body 1 by welding or bolting, enabling parallel operation of multiple cabinets and improving the flexibility and reliability of power supply. One side wall of the cabinet body 1 without bus tie socket sleeves 11 has a rear parallel cabinet plate 12 to enhance the stability of the splicing structure. The rear parallel cabinet plate 12 is made of galvanized steel and is fixed to the back of the gas-insulated cabinet body 1 by bolts or welding, enhancing the structural stability during cabinet splicing. The left and right side panels of the cabinet body 1 have corresponding bus tie sockets... The thickness of the sleeve 11 at the installation position is greater than the thickness of the rest. This design satisfies the installation strength requirements of the female connector sleeve 11 and also improves the insulation margin by increasing the distance between the rest of the side panel and the internal components. For example, the left and right side panels can be assembled with other parts of the cabinet by welding or bolting. The other side of the cabinet body 1 that is not connected to the female connector sleeve 11 is open, and the cabinet body 1 has a cabinet door 13 at the opening. The cabinet door 13 is divided into an instrument door 131 and a control door 132. 32 and cable door 133, cabinet door 13 can open or close the opening, the cabinet body 1 is provided with partition 14, the partition 14 divides the cabinet body 1 into a first chamber 15 and a second chamber 16, the first chamber 15 is located on the side of the partition 14 near the top of the cabinet body 1, the second chamber 16 is located on the side of the partition 14 near the bottom of the cabinet body 1, the partition 14 is set perpendicular to the side wall of the cabinet body 1, the side wall of the partition 14 is attached to the side wall of the cabinet body 1, and the partition 14 is welded to the cabinet body 1. In this embodiment, the partition 14 is stepped.

[0040] Reference Figure 1 and Figure 2The cabinet body 1 has a first partition plate 17 and a second partition plate 18 in the second chamber 16. The first partition plate 17 is located near the higher side of the partition plate 14, and is perpendicular to the partition plate 14 and the cabinet door 13. One side of the first partition plate 17 is attached to and welded to the side wall of the cabinet body 1, and the other side is attached to and welded to the higher side of the partition plate 14. The second partition plate 18 is located near the bottom of the cabinet body 1, and is parallel to the first partition plate 17. One side of the second partition plate 18 is welded to the partition plate 14, and the second partition plate 18 is also welded to the cabinet body 1. The first partition plate 17 and the cabinet body 1 form a receiving area for accommodating the instrument assembly 2. The instrument door 131 is located near the receiving area. One side of the instrument door 131 is hinged to the cabinet body 1, and the side of the instrument door 131 away from the hinge end is detachably connected to the cabinet body 1. This allows for easy opening and closing of the instrument door 131, facilitating the inspection and maintenance of the instrument. The instrument assembly 2 includes an instrument box 21, which is located within the receiving area and is fixedly connected to the partition 14 by screws. The instrument box 21 is used to install various monitoring instruments and control equipment, facilitating real-time monitoring and control of the switch cabinet's operating status by operators. The instrument box 21 can be made of plastic or metal to ensure good protection and electromagnetic shielding performance.

[0041] Reference Figure 1 and Figure 2 The first chamber 15 forms a transmission chamber for accommodating the connection of cables and various instruments, and also forms a placement area for the switch assembly 3. The switch assembly 3 includes an isolation mechanism 31, a circuit breaker mechanism 32, and a gas-insulated switch 33. The partition 14, the first partition 17, and the second partition 18 form a control chamber. The control door 132 is located in the control chamber and is detachably connected to the control chamber by bolts or buckles. The isolation mechanism 31 and the circuit breaker mechanism 32 are both located in the control chamber. The isolation mechanism 31 is used to isolate the circuit and ensure the safety of personnel and equipment during maintenance or repair. The circuit breaker mechanism 32 is used to cut off and connect the circuit and protect the power system from the influence of fault current. The control equipment is electrically connected to the isolation mechanism 31, the circuit breaker mechanism 32, and the gas-insulated switch 33.

[0042] Reference Figure 3 , Figure 4 and Figure 5The gas-insulated switch 33 is a key component for realizing opening and closing operations. The gas-insulated switch 33 includes a stationary disconnector contact 331, an arc-extinguishing chamber assembly 332, a circuit breaker operating spindle 333, and a connecting switch device 334. The stationary disconnector contact 331 is electrically connected to the disconnecting mechanism 31, and the circuit breaker mechanism 32 is drivenly connected to the circuit breaker operating spindle 333. Both the stationary disconnector contact 331 and the connecting switch device 334 are fixedly connected to the arc-extinguishing chamber assembly 332 with screws. The stationary disconnector contact 331 can be electrically connected to the circuit breaker operating spindle 333 through the connecting switch device 334. The connecting switch device 334 includes a disconnector spindle 3341 and a moving contact assembly 334. 2. The moving contact knife connecting copper part 3343, vacuum interrupter 3344, moving conductive rod of vacuum interrupter 3344, and stationary conductive rod of vacuum interrupter 3344 are connected. The main shaft 3341 of the disconnecting switch fixes the moving contact knife assembly 3342 and the moving contact knife connecting copper part 3343 respectively. The moving contact knife connecting copper part 3343 is connected to the vacuum interrupter 3344 through the stationary conductive rod of vacuum interrupter 3344. The moving conductive rod of vacuum interrupter 3344 is connected to the circuit breaker operating main shaft 333. The main shaft 3341 of the disconnecting switch directly drives the moving contact knife assembly 3342 to move, eliminating the traditional transmission crank arm, which not only reduces the lateral volume but also simplifies the transmission structure, reduces the number of failure points, and improves the reliability of the switch operation.

[0043] Reference Figure 3 , Figure 4 and Figure 5The arc-extinguishing chamber mounting base 332 serves to fix and support the stationary contact 331 of the disconnecting switch and connect the switching device 334. It can be made of metal and fixed to the inner wall of the switch mechanism chamber by bolts or welding. The stationary contact 331 of the disconnecting switch cooperates with the moving contact assembly 3342 to achieve circuit switching. The moving contact assembly 3342 and the moving contact connecting copper part 3343 are mounted on the disconnecting switch main shaft 3341 by a flat key or other fixing method. When the disconnecting switch main shaft 3341 rotates, it drives the moving contact assembly 3342 to contact or separate from the stationary contact 331 of the disconnecting switch, realizing the opening and closing operation. The copper connector 3343 connects the moving contact assembly 3342 to the vacuum interrupter 3344 to achieve current transmission. The vacuum interrupter 3344 is a highly efficient arc-extinguishing device that can quickly extinguish the arc during the opening and closing process, ensuring circuit safety. The stationary conductive rod and the moving conductive rod of the vacuum interrupter 3344 are used to connect the vacuum interrupter 3344 to the moving contact connector 3343 and the circuit breaker operating spindle 333, respectively, to achieve electrical connection. For example, the vacuum interrupter 3344 can use a ceramic or glass shell, with contacts and arc-extinguishing medium encapsulated inside. This forms a current transmission path of "disconnector spindle 3341 - moving contact assembly 3342 - vacuum interrupter 3344 - circuit breaker operating spindle 333", ensuring the stability of current transmission. Meanwhile, the installation of the vacuum interrupter 3344 improves the arc extinguishing effect during opening and closing, further ensuring circuit safety. This structure, while compressing the longitudinal installation space of the switch assembly 3, improves the performance and reliability of the equipment and solves the problems of large size and poor arc extinguishing effect of traditional switch cabinets.

[0044] Reference Figure 3 , Figure 4 and Figure 5An insulating cover 3311 is installed on the outside of the stationary contact 331 of the disconnector switch. A grounded disconnector grounding contact is installed at the bottom of the stationary contact 331. The insulating cover 3311 can be made of plastic or rubber with good insulation properties and is installed on the outside of the stationary contact 331 by sleeve or snap-fit. Its function is to increase the insulation margin of the moving contact assembly 3342 when the switch is open, preventing leakage or short circuit faults. The disconnector grounding contact is fixed to the bottom of the stationary contact 331 by welding or bolting and is connected to the grounding terminal of the cabinet through a grounding wire. This ensures that current is conducted to the ground during equipment maintenance or faults, protecting personnel and equipment safety. For example, the insulating cover 3311 can be designed as a detachable structure for easy access to the stationary contact of the disconnector switch. 331 is used for inspection and maintenance. When the isolating mechanism 31 drives the main shaft 3341 of the disconnecting switch, the compact environmentally friendly gas switch can be opened and closed. The insulating cover 3311 further increases the insulation margin of the moving contact assembly 3342 in the open position. Compared with traditional mm-wide standardized high-voltage transmission and distribution switches, the traditional transmission crank arm is eliminated, further reducing the size of the gas-insulated switch 33. The downward position of the main shaft 3341 allows the gas-insulated switch 33 to move downwards in height, reducing the size of the compact environmentally friendly gas-insulated cabinet while maintaining good insulation performance and structural stability. The insulating cover 3311 improves the insulation performance of the switch and reduces the risk of failure due to insufficient insulation. The grounding design of the disconnecting switch grounding contact provides safety assurance for the equipment, ensuring that current is promptly introduced to the ground in case of equipment abnormalities, preventing damage to personnel and equipment. This design improves the safety and reliability of the equipment while ensuring the normal operation of the switchgear.

[0045] Reference Figure 3 , Figure 4 and Figure 5The circuit breaker operating spindle 333 is equipped with a circuit breaker spindle crank arm 3331 and a copper rod connecting contact 3332. The circuit breaker spindle crank arm 3331 and the copper rod connecting contact 3332 are arranged in a non-contact configuration. The circuit breaker operating spindle 333 is also equipped with a creepage device 3333 for separating adjacent connected switching devices 334. The circuit breaker spindle crank arm 3331 and the copper rod connecting contact 3332 are installed on the circuit breaker operating spindle 333 by welding or keying. The circuit breaker spindle crank arm 3331 is used to connect to the output end of the circuit breaker mechanism 32. The circuit breaker operating spindle 333 is rotated by transmission components such as connecting rods. Copper rods connected to contact heads 3332 are used for electrical connection and current transmission. The circuit breaker spindle crank arm 3331 and the copper rod connected to contact heads 3332 are spatially staggered, avoiding the risk of motion interference, eliminating the need for additional safety clearances, reducing installation space requirements, and further reducing the volume of the switchgear compartment. Creeper 3333 is a disc-shaped insulating component extending radially along the circuit breaker operating spindle 333, and is installed on the circuit breaker operating spindle 333 by sleeve or snap-fit. Its function is to separate adjacent connected switchgear 334, preventing creepage and improving the equipment's insulation performance. For example, creepper 3333 can be made of insulating materials such as epoxy resin. The creepper 3333 effectively prevents creepage between adjacent connected switchgear 334, improving the equipment's insulation performance and operational reliability. This design optimizes the internal structure of the switchgear while improving the equipment's safety and stability.

[0046] Reference Figure 2 and Figure 6 The main body 1 of the cabinet has a third partition plate 19 in the second chamber 16. The third partition plate 19 is located near the lower side of the partition plate 14 and is perpendicular to the partition plate 14. The third partition plate 19 is parallel to the cabinet door 13. One side of the third partition plate 19 is attached to and welded to the bottom wall of the main body 1, and the other side is attached to and welded to the lower side of the partition plate 14. The side of the third partition plate 19 near the cabinet door 13, the partition plate 14, the second partition plate 18, and the bottom wall of the main body 1 form a cable compartment for cable placement. The cable compartment is used to connect cables to realize the electrical connection between the switch cabinet and the external power grid. The cable assembly 4 includes a connecting sleeve 41. The cable door 133 is detachably connected to the cable compartment by bolts or clips, which facilitates the installation and maintenance of the cable. The connecting sleeve 41 passes through the partition 14 and is fixed to the partition 14 by screws. The connecting sleeve 41 ensures a sealed connection between the cable and the components inside the cabinet to prevent gas leakage. The connecting sleeve 41 can be made of epoxy resin wrapped around a conductive rod and has a sealing groove. It is connected to the cabinet by bolts through a sealing ring, which has good sealing and insulation performance.

[0047] Reference Figure 2 and Figure 6The third partition 19, on the side away from the cabinet door 13, the partition 14, and the cabinet body 1 form a pressure relief chamber. The partition 14 is provided with multiple pressure relief pipes 141 near the pressure relief chamber. The pressure relief pipes 141 are welded to the partition 14 and connect the first chamber 15 and the second chamber 16. A pressure relief valve 142 is fixedly connected to each pressure relief pipe 141 on the partition 14 via a flange. A pressure gauge is provided on the side of the first partition 17 away from the opening on the partition 14 to measure the pressure on the side of the first partition 17 away from the opening. The pressure gauge and the pressure relief valve 142 are electrically connected to the controller. A specific program is programmed into the controller. When the air pressure in the cabinet exceeds the set value, pressure relief is required. The pressure gauge transmits a signal to the controller, which controls the pressure relief valve 142 to open or close. In this embodiment, the pressure relief valve 142 adopts a pressure-triggered automatic opening structure. For example, the pressure relief valve 142 can adopt a spring-type or diaphragm-type structure.

[0048] The implementation principle of this compact environmentally friendly gas-insulated switchgear is as follows: This compact environmentally friendly gas-insulated switchgear 33, through the rational arrangement of components such as the main body 1, partition 14, panel assembly, and pressure relief mechanism, and by vertically arranging the instrument box, switch mechanism compartment, and cable compartment, effectively reduces the lateral space occupied by the cabinet, achieving efficient utilization of internal space, reducing the volume of the switchgear, and achieving the goal of compact design; simultaneously, it adopts an environmentally friendly gas insulation method, reducing the impact on the environment; the optimized side plate thickness design, while ensuring installation strength, increases the internal insulation spacing and improves insulation performance. These improvements enable the switchgear to meet the requirements of high-voltage transmission and distribution... While meeting electrical requirements, the size has been significantly reduced, the amount of sulfur hexafluoride gas used has been reduced, and environmental friendliness and installation flexibility have been improved. It solves the problem that traditional switchgear is large and cannot meet the requirements of existing standards. In terms of the switching mechanism, the moving contact knife assembly 3342 is directly driven by the disconnecting switch main shaft 3341, eliminating the traditional transmission crank arm, reducing the size, simplifying the structure, and improving the reliability of the switching action. At the same time, the setting of the insulating cover 3311 and the creepage device 3333 improves the insulation performance of the equipment and reduces safety hazards. The pressure relief mechanism can release pressure in time according to the changes in the gas pressure inside the cabinet, ensuring the safety of the equipment. Compared with traditional switchgear, it has made significant improvements and enhancements.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A compact, environmentally friendly gas-insulated switchgear, characterized in that: The system includes a cabinet body (1), an instrument assembly (2), and a switch assembly (3). The cabinet body (1) is hollow, with one side wall of the cabinet body (1) having an opening. A cabinet door (13) is installed at the opening of the cabinet body (1). A stepped partition (14) is connected inside the cabinet body (1). The partition (14) is perpendicular to the side wall of the cabinet body (1). The partition (14) divides the cabinet body (1) into a first chamber (15) and a second chamber (16). The cabinet body (1) has a first subdivision in the second chamber (16). The first partition (17) is vertically connected to the higher side of the partition (14), and the first partition (17) is vertically arranged with the cabinet door (13). The second partition (18) is parallel connected to the side of the first partition (17) near the bottom of the cabinet body (1). The first partition (17) and the cabinet body (1) form a receiving area for the instrument assembly (2). The instrument assembly (2) is connected to the partition (14) and the instrument assembly (2) is connected to the switch assembly (3). The first chamber (15) forms a placement area for placing the switch assembly (3), the switch assembly (3) including a gas-insulated switch (33), the gas-insulated switch (33) including a connecting switch device (334), the connecting switch device (334) including a disconnecting switch spindle (3341) and a moving contact assembly (3342), the disconnecting switch spindle (3341) is connected to the moving contact assembly (3342), the disconnecting switch spindle (3341) directly drives the moving contact assembly (3342) to contact or separate from the disconnecting switch stationary contact (331).

2. The compact environmentally friendly gas-insulated switchgear according to claim 1, characterized in that: The switch assembly (3) further includes an isolation mechanism (31) and a circuit breaker mechanism (32), both of which are connected to the first sub-board (17). The isolation mechanism (31) is used to isolate the circuit, and the circuit breaker mechanism (32) is used to cut off and connect the circuit. The gas-insulated switch (33) also includes a disconnector stationary contact (331), an arc-extinguishing chamber assembly (332), and a circuit breaker operating spindle (333). The disconnector stationary contact (331) is electrically connected to the disconnector mechanism (31), and the circuit breaker mechanism (32) is drivenly connected to the circuit breaker operating spindle (333). The disconnector stationary contact (331) and the connecting switch device (334) are both connected to the arc-extinguishing chamber assembly (332), and the arc-extinguishing chamber assembly (332) is connected to the disconnector spindle (3341).

3. A compact, environmentally friendly gas-insulated switchgear according to claim 2, characterized in that: The connecting switch device (334) further includes a moving contact connecting copper piece (3343), a vacuum interrupter (3344), a moving conductive rod of the vacuum interrupter (3344), and a stationary conductive rod of the vacuum interrupter (3344). The moving contact connecting copper piece (3343) is connected to the vacuum interrupter (3344) through the stationary conductive rod of the vacuum interrupter (3344), and the moving conductive rod of the vacuum interrupter (3344) is connected to the circuit breaker operating spindle (333).

4. A compact, environmentally friendly gas-insulated switchgear according to claim 1, characterized in that: The cabinet body (1) has a rear cabinet panel (12) on the side directly opposite the opening, and the rear cabinet panel (12) is connected to the cabinet body (1).

5. A compact, environmentally friendly gas-insulated switchgear according to claim 4, characterized in that: The cabinet body (1) has multiple female connector sleeves (11) on each of the other two opposite side walls that are not connected to the rear cabinet panel (12). The multiple female connector sleeves (11) are spaced apart along their length direction near the top side of the cabinet body (1).

6. A compact, environmentally friendly gas-insulated switchgear according to claim 1, characterized in that: It also includes a cable assembly (4), and the cabinet body (1) is connected to a third partition (19) in the second chamber (16). The third partition (19) is close to the lower side of the partition (14), the third partition (19) is perpendicular to the partition (14), the third partition (19) is parallel to the cabinet door (13), and the third partition (19), the partition (14), the second partition (18) and the bottom wall of the cabinet body (1) form a cable chamber for placing the cable assembly (4); The cable assembly (4) includes a connecting sleeve (41) which passes through the partition (14) and is connected to the partition (14). The connecting sleeve (41) ensures a sealed connection between the cable and the components inside the cabinet.

7. A compact, environmentally friendly gas-insulated switchgear according to claim 2, characterized in that: The circuit breaker operating spindle (333) is provided with a circuit breaker spindle crank arm (3331) and a copper rod connecting contact (3332). The circuit breaker spindle crank arm (3331) and the copper rod connecting contact (3332) are arranged in a non-contact manner. The circuit breaker spindle crank arm (3331) is used to connect to the output end of the circuit breaker mechanism (32).

8. A compact, environmentally friendly gas-insulated switchgear according to claim 2, characterized in that: An insulating cover (3311) is provided on the outside of the stationary contact (331) of the disconnecting switch, and a grounded disconnecting switch grounding contact is provided at the bottom of the stationary contact (331).

9. A compact, environmentally friendly gas-insulated switchgear according to claim 8, characterized in that: The circuit breaker operating spindle (333) is also provided with a plurality of creepers (3333) for separating adjacent connected switching devices (334), and the plurality of creepers (3333) extend radially along the circuit breaker operating spindle (333).

10. A compact, environmentally friendly gas-insulated switchgear according to claim 6, characterized in that: The third partition (19) away from the cabinet door (13), the partition (14) and the cabinet body (1) form a pressure relief chamber. The partition (14) is provided with multiple pressure relief pipes (141) near the pressure relief chamber. The pressure relief pipes (141) are connected to the partition (14) and connect the first chamber (15) and the second chamber (16). The partition (14) is connected to a pressure relief valve (142) on each of the pressure relief pipes (141).

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