Environment-friendly gas insulated switchgear

Abstract

The application belongs to the technical field of electrical equipment, and particularly relates to an environmentally-friendly gas insulated switch cabinet, which comprises a gas tank and a mechanism chamber. A load switch and a grounding switch connected with each other are arranged in the gas tank. The load switch comprises a switch fixed plate, a fixed cross arm, a first contact, a second contact, a piston rod and a movable contact pipe. The switch fixed plate is connected with the inner wall of the gas tank at both ends in a first direction. The two switch fixed plates are arranged at intervals in a second direction. The fixed cross arm is located on one side of the switch fixed plate in a third direction. The first contact and the second contact are arranged at intervals between the two switch fixed plates. The piston rod is arranged on the fixed cross arm. The movable contact pipe can move along the extension direction of the piston rod and is in conductive connection or separation with the first contact. In the embodiment, the load switch adopts a direct-acting design, has stronger arc extinguishing performance, and can reduce the production and maintenance costs of the environmentally-friendly gas insulated switch cabinet compared with the circuit breaker scheme.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, specifically relating to an environmentally friendly gas-insulated switchgear. Background Technology

[0002] Switchgear is an electrical device primarily used for controlling, protecting, and distributing electrical energy, playing a crucial role in power systems. Existing gas-insulated switchgear mostly uses sulfur hexafluoride (SF6) gas as the insulating medium. While SF6 gas possesses excellent insulation and arc-extinguishing properties, its strong greenhouse effect contradicts environmental protection requirements.

[0003] Compared to sulfur hexafluoride gas, environmentally friendly gases (such as air and nitrogen) have relatively lower insulation and arc-extinguishing properties. Due to these insufficient insulation and arc-extinguishing properties, existing environmentally friendly gas-insulated switchgear often requires the use of circuit breakers instead of load switches. Circuit breakers, in turn, require vacuum interrupters, leading to complex equipment structures and significantly increasing the production and maintenance costs of the switchgear. Utility Model Content

[0004] The purpose of this application is to provide an environmentally friendly gas-insulated switchgear to improve the arc-extinguishing performance of load switches and reduce the production and maintenance costs of environmentally friendly gas-insulated switchgear.

[0005] To achieve the above objectives, this application provides a display panel comprising a mutually isolated gas chamber and a mechanism chamber, wherein a load switch and a grounding switch are connected within the gas chamber, and the load switch includes: A switch fixing plate, wherein the two ends of the switch fixing plate in the first direction are connected to the inner wall of the air box, and two switch fixing plates are spaced apart in the second direction; A fixed crossarm is provided, which is connected to the inner wall of the air box at both ends in the first direction. The fixed crossarm is located on one side of the third direction of the switch fixing plate. The first direction, the second direction and the third direction are perpendicular to each other. A first contact is disposed between the two switch fixing plates, and the first contact is assembled and connected to at least one of the switch fixing plates. The second contact is disposed between the two switch fixing plates and located on the third-direction side of the first contact, and the second contact is assembled and connected to at least one of the switch fixing plates; The piston rod is mounted on the fixed crossarm and extends toward the first contact. A movable contact tube is inserted into the second contact and electrically connected to the second contact. The movable contact tube is sleeved on the piston rod and can move along the extension direction of the piston rod, electrically connecting or separating from the first contact.

[0006] Optionally, both the first contact and the second contact are connected to the switch fixing plate via fasteners. The load switch also includes a first shield and a second shield. The first shield covers the fasteners connecting the first contact and the switch fixing plate, and the second shield covers the fasteners connecting the second contact and the switch fixing plate.

[0007] Optionally, the load switch includes a first operating shaft and a first operating link, the first operating shaft extending along a first direction, and the first operating link connecting the first operating shaft and the movable contact tube.

[0008] Optionally, the environmentally friendly gas-insulated switchgear includes a first operating mechanism, which is disposed in the mechanism chamber. A first operating shaft passes through the partition between the gas box and the mechanism chamber and is connected to the first operating mechanism. The first operating shaft and the partition are rotatably sealed together.

[0009] Optionally, the environmentally friendly gas-insulated switchgear includes an inlet bushing, a first copper busbar, a second copper busbar, a connecting copper rod, and an outlet bushing. The inlet bushing extends along the second direction. The first copper busbar connects the conductive wire in the inlet bushing to the first contact. The second copper busbar connects to the second contact. The connecting copper rod connects the second copper busbar to the conductive wire in the outlet bushing. The outlet bushing extends along the first direction.

[0010] Optionally, the grounding switch includes a second operating shaft, a second operating linkage, a moving contact, and a stationary contact. The second operating shaft extends along the first direction, and the second operating linkage is connected to the second operating shaft. The two moving contacts are disposed on both sides of the second operating linkage in the first direction, and the stationary contact is disposed on the second copper busbar. The second operating shaft is rotatable to make the moving contact and the stationary contact electrically connected or separated.

[0011] Optionally, the grounding switch includes a moving arc contact and a stationary arc contact. The moving arc contact includes a first end and a second end opposite to each other. The first end of the moving arc contact is connected to the moving contact. The two moving arc contacts are arranged on both sides of the two moving contacts in the first direction. The distance between the second end of the moving arc contact and the second operating shaft is greater than the distance between the moving contact and the second operating shaft. The two stationary arc contacts are arranged on both sides of the stationary contact in the first direction.

[0012] Optionally, the moving arc contact and the stationary arc contact are copper-tungsten alloy structural components.

[0013] Optionally, the grounding switch includes a stationary shield and a moving shield. The two stationary shields are disposed on both sides of the two stationary arc contacts in the first direction. The moving shield is disposed between the second operating shaft and the stationary contact. The moving shield has a clearance groove for the passage of the second operating linkage, the moving contact and the moving arc contact.

[0014] Optionally, the environmentally friendly gas-insulated switchgear includes a second operating mechanism, which is disposed in the mechanism chamber. The second operating shaft passes through the partition between the gas box and the mechanism chamber and is connected to the second operating mechanism. The second operating shaft and the partition are rotatably sealed together.

[0015] The environmentally friendly gas-insulated switchgear disclosed in this application has the following beneficial effects: In this application, the environmentally friendly gas-insulated switchgear includes a gas box and a mechanism chamber. The gas box houses a load switch and a grounding switch connected to each other. The load switch includes a switch fixing plate, a fixed crossarm, a first contact, a second contact, a piston rod, and a movable contact tube. The switch fixing plates are connected to the inner wall of the gas box at both ends in a first direction, and two switch fixing plates are spaced apart in a second direction. The fixed crossarm is connected to the inner wall of the gas box at both ends in the first direction and is located on one side of the switch fixing plates in a third direction. The first contact and the second contact are spaced apart between the two switch fixing plates. The piston rod is mounted on the fixed crossarm and extends towards the first contact. The movable contact tube passes through the second contact and is electrically connected to it. The movable contact tube is sleeved on the piston rod and can move along the extension direction of the piston rod, electrically connecting or separating from the first contact. In this embodiment, the load switch adopts a direct-acting design, which has stronger arc-extinguishing performance compared to existing knife-switch type load switches. Compared to using a circuit breaker solution, it can reduce the production and maintenance costs of the environmentally friendly gas-insulated switchgear.

[0016] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1This is a schematic diagram of the structure of the environmentally friendly gas-insulated switchgear in the embodiments of this application.

[0020] Figure 2 yes Figure 1 Left view of the Zhonghuanbao gas-insulated switchgear.

[0021] Figure 3 This is a schematic diagram of the load switch and grounding switch in the embodiments of this application.

[0022] Figure 4 This is a three-dimensional schematic diagram of the load switch and the grounding switch in the embodiments of this application.

[0023] Figure 5 This is a three-dimensional schematic diagram of the grounding switch in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures: 110. Gas box; 120. Mechanism room; 130. Low-pressure room; 140. Cable room; 101. Partition; 102. Support plate; 103. Rib; 200. Load switch; 210. Switch mounting plate; 220. Fixed crossarm; 230. First contact; 240. Second contact; 250. Piston rod; 260. Movable contact tube; 271. First shielding cover; 272. Second shielding cover; 281. First operating shaft; 282. First operating linkage; 310. First operating mechanism; 320. Second operating mechanism; 400. Grounding switch; 411. Second operating shaft; 412. Second operating linkage; 420. Moving contact; 430. Stationary contact; 440. Moving arc contact; 450. Stationary arc contact; 460. Stationary end shielding cover; 470. Moving end shielding plate; 471. Clearance groove; 480. Support beam; 510. Inlet sleeve; 520. First copper busbar; 530. Second copper busbar; 540. Connecting copper rod; 550. Outlet sleeve. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0026] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0027] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.

[0028] See Figures 1 to 4 As shown, the environmentally friendly gas-insulated switchgear includes a gas box 110 and a mechanism chamber 120, which are separated by a partition 101. The gas box 110 houses a load switch 200 and a grounding switch 400 connected to each other. The load switch 200 includes a switch fixing plate 210, a fixed crossarm 220, a first contact 230, a second contact 240, a piston rod 250, and a movable contact tube 260.

[0029] The switch fixing plate 210 is connected to the inner wall of the gas box 110 at both ends in the first direction. The gas box 110 and the mechanism chamber 120 are separated by a partition 101, i.e., the switch fixing plate 210 is connected to the partition 101. The two switch fixing plates 210 are spaced apart in the second direction. The switch fixing plate 210 can be directly connected to the inner wall of the gas box 110, or the environmentally friendly gas-insulated switch cabinet also includes a support plate 102. The switch fixing plate 210 is indirectly connected to the inner wall of the gas box 110 through the support plate 102. The support plate 102 and the gas box 110 are detachably connected. The fixed crossarm 220 is connected to the inner wall of the gas box 110 at both ends in the first direction. The fixed crossarm 220 is directly connected to the inner wall of the gas box 110, or indirectly connected to the inner wall of the gas box 110 through the support plate 102. The fixed crossarm 220 is located on the side of the switch fixing plate 210 in the third direction, and the first direction, the second direction and the third direction intersect each other, or the first direction, the second direction and the third direction are perpendicular to each other.

[0030] A first contact 230 is disposed between two switch fixing plates 210. The first contact 230 is assembled and connected to one of the switch fixing plates 210, or to both switch fixing plates 210. A second contact 240 is disposed between the two switch fixing plates 210 and located on the third-direction side of the first contact 230. The second contact 240 is assembled and connected to one of the switch fixing plates 210, or to both switch fixing plates 210. A piston rod 250 is disposed on the fixed crossarm 220 and extends towards the first contact 230, i.e., the piston rod 250 extends along the third-direction. A movable contact tube 260 passes through the second contact 240 and is electrically connected to the second contact 240. The movable contact tube 260 is sleeved on the piston rod 250 and can move along the extension direction of the piston rod 250, electrically connecting or separating from the first contact 230.

[0031] Since the movable contact tube 260 is always electrically connected to the second contact 240, and the movable contact tube 260 is electrically connected to the first contact 230, the first contact 230 and the second contact 240 can be electrically connected, thus realizing the closing of the load switch 200; when the movable contact tube 260 is separated from the first contact 230, the first contact 230 and the second contact 240 can be separated, thus realizing the opening of the load switch 200.

[0032] In this embodiment, the first contact 230 and the second contact 240 move "directly" along the piston rod 250 via the movable contact tube 260 to achieve the closing and opening of the load switch 200. Compared with the knife switch type load switch 200, gas can flow between the first contact 230 and the movable contact tube 260 when opening, achieving faster arc extinguishing. Because the load switch 200 in this embodiment adopts a direct-acting design, its arc extinguishing performance is stronger, and the gas box 110 can be filled with environmentally friendly gases, such as dry air or nitrogen.

[0033] Existing environmentally friendly gas-insulated switchgear often requires the use of circuit breaker solutions to replace the load switch 200 solution. However, the circuit breaker solution requires the use of a vacuum interrupter, which leads to a complex equipment structure and significantly increases the production and maintenance costs of the switchgear.

[0034] In this embodiment, the environmentally friendly gas-insulated switchgear includes a gas box 110 and a mechanism chamber 120. A load switch 200 and a grounding switch 400 are connected within the gas box 110. The load switch 200 includes a switch fixing plate 210, a fixed crossarm 220, a first contact 230, a second contact 240, a piston rod 250, and a movable contact tube 260. The switch fixing plates 210 are connected to the inner wall of the gas box 110 at both ends in a first direction, and the two switch fixing plates 210 are spaced apart in a second direction. The fixed crossarm 220 is connected to the inner wall of the gas box 110 at both ends in the first direction. The inner wall is connected, and the fixed crossarm 220 is located on one side of the switch fixing plate 210 in a third direction. The first contact 230 and the second contact 240 are spaced apart between the two switch fixing plates 210. The piston rod 250 is mounted on the fixed crossarm 220 and extends towards the first contact 230. The movable contact tube 260 passes through the second contact 240 and is electrically connected to the second contact 240. The movable contact tube 260 is sleeved on the piston rod 250 and can move along the extension direction of the piston rod 250, electrically connecting or separating from the first contact 230. In this embodiment, the load switch 200 adopts a direct-acting design, which has stronger arc-extinguishing performance compared with the existing knife-switch type load switch 200. Compared with the circuit breaker solution, it can reduce the production and maintenance costs of environmentally friendly gas-insulated switchgear.

[0035] Furthermore, the load switch 200 adopts a direct-acting design, resulting in a more compact structure. Compared to circuit breaker solutions, the environmentally friendly gas-insulated switchgear is more compact, significantly saving installation space and adapting to confined installation environments in power distribution scenarios. The direct-acting design also reduces wear between the moving contact tube 260 and the first contact 230, extending the load switch 200's service life. The switch mounting plate 210 and the fixed crossarm 220 are connected to the gas box 110 via a support plate 102. The support plate 102 and the gas box 110 are detachably connected, allowing the load switch 200 to be disassembled and reassembled as a whole. This modular design reduces manufacturing and on-site installation costs, while also facilitating later maintenance and component replacement, reducing equipment downtime.

[0036] In some embodiments, the first contact 230 and the second contact 240 are both connected to the switch fixing plate 210 by fasteners. The load switch 200 also includes a first shielding cover 271 and a second shielding cover 272. The first shielding cover 271 covers the fasteners connecting the first contact 230 and the switch fixing plate 210, and the second shielding cover 272 covers the fasteners connecting the second contact 240 and the switch fixing plate 210. The shielding covers are made of metal.

[0037] The concentration of electric field on the conductor surface can easily lead to the breakdown of environmentally friendly insulating media (such as dry air). In this embodiment, the fasteners are shielded by a shielding cover, so that the electric field strength is evenly distributed within the safe threshold, which fully meets the insulation requirements of dry gas at the 24kV level and avoids the risk of partial discharge and insulation failure.

[0038] In some embodiments, the load switch 200 includes a first operating shaft 281 and a first operating link 282. The first operating shaft 281 extends along a first direction, and the first operating link 282 connects the first operating shaft 281 and the movable contact tube 260. When the first operating shaft 281 rotates, the first operating link 282 rotates with the first operating shaft 281, causing the movable contact tube 260 to move up and down along the extension direction of the piston rod 250, thereby realizing the closing and opening of the load switch 200.

[0039] The first operating shaft 281 extends along a first direction, and each first operating shaft 281 can be connected to a plurality of first operating links 282, and each first operating link 282 controls a plurality of movable contact tubes 260.

[0040] In some embodiments, the environmentally friendly gas-insulated switchgear includes a first operating mechanism 310, which is disposed within an operating chamber 120. The operating chamber 120 is located on one side of the gas box 110 in a first direction. A first operating shaft 281 passes through a partition plate 101 between the gas box 110 and the operating chamber 120 and is connected to the first operating mechanism 310. The first operating shaft 281 and the partition plate 101 are rotatably sealed together. Alternatively, the first operating mechanism 310 is partially disposed within the operating chamber 120 and partially passes through the partition plate 101 and is connected to the first operating shaft 281. The first operating shaft 281 is completely disposed within the gas box 110, and its two ends in the first direction are indirectly connected to the inner wall of the gas box 110 via support plates 102.

[0041] The first operating mechanism 310 is located in the mechanism room 120. The air box 110 and the mechanism room 120 are set up separately. Through "functional zoning isolation", the conflict between different components on environmental, safety and operation and maintenance needs can be resolved, and the three core goals of improving equipment reliability, reducing failure risk and simplifying operation and maintenance can be achieved.

[0042] In some embodiments, the switch fixing plate 210, the fixing crossarm 220 and the first operating linkage 282 are all provided with integrally formed ribs 103.

[0043] The switch fixing plate 210, the fixing crossarm 220 and the first operating linkage 282 are all provided with integrally formed ribs 103. This design can not only enhance the structural strength of itself and resist the vibration and impact during equipment operation, but also extend the creepage distance between phases and between phases and ground, and improve insulation redundancy.

[0044] In some embodiments, the environmentally friendly gas-insulated switchgear includes an inlet bushing 510, a first copper busbar 520, a second copper busbar 530, a connecting copper rod 540, and an outlet bushing 550. The inlet bushing 510 extends along a second direction. The first copper busbar 520 connects the conductive wire in the inlet bushing 510 to the first contact 230. The second copper busbar 530 is connected to the second contact 240. The connecting copper rod 540 connects the second copper busbar 530 to the conductive wire in the outlet bushing 550. The outlet bushing 550 extends along a first direction. Furthermore, the environmentally friendly gas-insulated switchgear also includes a low-voltage chamber 130 and a cable chamber 140. The low-voltage chamber 130 is located on the third-direction side of the mechanism chamber 120 and is close to the inlet bushing 510. The cable chamber 140 is located on the other side of the gas box 110 and the mechanism chamber 120 in the third-direction direction. The cable chamber 140 is close to the outlet bushing 550, and the conductive wire in the outlet bushing 550 is introduced into the cable chamber 140.

[0045] In some embodiments, see Figures 1 to 5 As shown, the grounding switch 400 includes a second operating shaft 411, a second operating link 412, a moving contact 420, and a stationary contact 430. The second operating shaft 411 extends along a first direction, and the second operating link 412 is connected to the second operating shaft 411. Two moving contacts 420 are disposed on both sides of the second operating link 412 in the first direction. The first end of the second operating link 412 is connected to the second operating shaft 411, and the first end of the moving contact 420 is connected to the second end of the second operating link 412. The second end of the moving contact 420 extends out of the second operating link 412 in a direction away from the second operating shaft 411, forming a cantilever structure. The first ends of the two moving contacts 420 clamp the second end of the second operating link 412, forming a sandwich structure. The stationary contact 430 is disposed on a second copper busbar 530. The second operating shaft 411 can rotate to electrically connect or disconnect the moving contact 420 from the stationary contact 430. The second operating axis 411 can control multiple second operating links 412, each of which controls a pair of moving contacts 420 and a stationary contact 430 to connect or separate.

[0046] The grounding switch 400 adopts a knife switch structure, which is simple in structure and highly reliable.

[0047] In some embodiments, the grounding switch 400 includes a moving arc contact 440 and a stationary arc contact 450. The moving arc contact 440 includes a first end and a second end opposite to each other. The first end of the moving arc contact 440 is connected to a moving contact 420, and the two moving arc contacts 440 are disposed on both sides of the two moving contacts 420 in a first direction. That is, the two moving arc contacts 440 sandwich the second end of the second operating link 412 formed by the two moving contacts 420 in the middle. The distance between the second end of the moving arc contact 440 and the second operating shaft 411 is greater than the distance between the moving contact 420 and the second operating shaft 411. The two stationary arc contacts 450 are disposed on both sides of the stationary contact 430 in a first direction. That is, the two stationary arc contacts 450 sandwich the stationary contact 430 to form a sandwich structure.

[0048] The distance between the second end of the moving arc contact 440 and the second operating shaft 411 is greater than the distance between the moving contact 420 and the second operating shaft 411. When the second operating shaft 411 rotates to close and open the grounding switch 400, the moving arc contact 440 and the stationary arc contact 450 make contact before the moving contact 420 and the stationary contact 430.

[0049] When a fault occurs in an environmentally friendly gas-insulated switchgear, the grounding switch 400 must be able to safely close short-circuit currents without structural damage. However, existing grounding switches 400 only have moving contacts 420 and stationary contacts 430, meaning that a single set of contacts simultaneously performs both "current carrying" and "arc ignition" functions. Limited by the contact material (usually a single metal), it is difficult to simultaneously achieve both "erosion resistance" and "current carrying capacity." In the event of a fault, the high-temperature arc generated by the short-circuit current can easily cause severe erosion of the contacts, leading to performance degradation and failing to meet long-term safe operation requirements.

[0050] In this embodiment, the grounding switch 400 also includes a moving arc contact 440 and a stationary arc contact 450. The moving arc contact 440 and the stationary arc contact 450 are used for "arc initiation", and the moving contact 420 and the stationary contact 430 are used for "current conduction". This can improve the lifespan of the grounding switch 400 contacts and improve the reliability and lifespan of the grounding switch 400.

[0051] In some embodiments, the moving arc contact 440 and the stationary arc contact 450 are copper-tungsten alloy structural components, and the moving contact 420 and the stationary contact 430 are copper metal structural components.

[0052] The moving contact 420 and stationary contact 430 are made of copper, which has excellent conductivity, meeting the current-carrying requirements of the grounding switch 400 while reducing material costs. The moving arc contact 440 and stationary arc contact 450 are made of copper-tungsten alloy, which has excellent arc erosion resistance, maintaining structural stability under the high-temperature arc generated by short-circuit current, significantly extending the service life of the arc contact. The moving contact 420, stationary contact 430 and the moving arc contact 440, stationary arc contact 450 are made of different materials, balancing "erosion resistance" and "current-carrying capacity," adapting to the different requirements of short-circuit fault conditions and normal operation conditions.

[0053] In some embodiments, the grounding switch 400 includes a stationary shield 460 and a moving shield 470, with the two stationary shields 460 disposed on both sides of the two stationary arc contacts 450 in a first direction. The moving shield 470 is disposed between the second operating shaft 411 and the stationary contact 430, and the moving shield 470 has a clearance groove 471 for the passage of the second operating link 412, the moving contact 420, and the moving arc contact 440. The grounding switch 400 may also include a support beam 480 extending along the first direction, and the moving shield 470 may be mounted on the support beam 480.

[0054] The concentration of electric field on the conductor surface can easily lead to the breakdown of environmentally friendly insulating media (such as dry air). In this embodiment, the electric field strength is evenly distributed within the safe threshold through the shielding cover and the moving and stationary ends of the shielding plate, which fully meets the insulation requirements of dry gas at the 24kV level and avoids the risk of partial discharge and insulation failure.

[0055] In some embodiments, the environmentally friendly gas-insulated switchgear includes a second operating mechanism 320, which is disposed within the mechanism chamber 120. A second operating shaft 411 passes through a partition plate 101 between the gas box 110 and the mechanism chamber 120 and is connected to the second operating mechanism 320. The second operating shaft 411 and the partition plate 101 are rotatably sealed together. Alternatively, the second operating mechanism 320 is partially disposed within the mechanism chamber 120 and partially passes through the partition plate 101 and is connected to the second operating shaft 411. The second operating shaft 411 is completely disposed within the gas box 110, and its two ends in a first direction are indirectly connected to the inner wall of the gas box 110 via support plates 102.

[0056] The second operating mechanism 320 is located in the mechanism room 120. The air box 110 and mechanism room 120 are set up separately. Through "functional zoning isolation", the conflict between different components on environmental, safety and operation and maintenance needs can be resolved, and the three core goals of improving equipment reliability, reducing failure risk and simplifying operation and maintenance can be achieved.

[0057] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. An environmentally friendly gas-insulated switchgear, characterized in that, It includes a gas box and a mechanism chamber that are isolated from each other. The gas box is equipped with a load switch and a grounding switch connected to each other. The load switch includes: A switch fixing plate, wherein the two ends of the switch fixing plate in the first direction are connected to the inner wall of the air box, and two switch fixing plates are spaced apart in the second direction; A fixed crossarm is provided, which is connected to the inner wall of the air box at both ends in the first direction. The fixed crossarm is located on one side of the third direction of the switch fixing plate. The first direction, the second direction and the third direction are perpendicular to each other. A first contact is disposed between the two switch fixing plates, and the first contact is assembled and connected to at least one of the switch fixing plates. The second contact is disposed between the two switch fixing plates and located on the third-direction side of the first contact, and the second contact is assembled and connected to at least one of the switch fixing plates; The piston rod is mounted on the fixed crossarm and extends toward the first contact. A movable contact tube is inserted into the second contact and electrically connected to the second contact. The movable contact tube is sleeved on the piston rod and can move along the extension direction of the piston rod, electrically connecting or separating from the first contact.

2. The environmentally friendly gas-insulated switchgear according to claim 1, characterized in that, The first contact and the second contact are both connected to the switch fixing plate by fasteners. The load switch also includes a first shield and a second shield. The first shield covers the fasteners connecting the first contact and the switch fixing plate, and the second shield covers the fasteners connecting the second contact and the switch fixing plate.

3. The environmentally friendly gas-insulated switchgear according to claim 1, characterized in that, The load switch includes a first operating shaft and a first operating link. The first operating shaft extends along a first direction, and the first operating link connects the first operating shaft and the movable contact tube.

4. The environmentally friendly gas-insulated switchgear according to claim 3, characterized in that, The environmentally friendly gas-insulated switchgear includes a first operating mechanism, which is located in the mechanism chamber. A first operating shaft passes through the partition between the gas box and the mechanism chamber and is connected to the first operating mechanism. The first operating shaft and the partition are rotatably sealed together.

5. The environmentally friendly gas-insulated switchgear according to claim 1, characterized in that, The environmentally friendly gas-insulated switchgear includes an inlet bushing, a first copper busbar, a second copper busbar, a connecting copper rod, and an outlet bushing. The inlet bushing extends along the second direction. The first copper busbar connects the conductive wire in the inlet bushing to the first contact. The second copper busbar connects to the second contact. The connecting copper rod connects the second copper busbar to the conductive wire in the outlet bushing. The outlet bushing extends along the first direction.

6. The environmentally friendly gas-insulated switchgear according to claim 5, characterized in that, The grounding switch includes a second operating shaft, a second operating linkage, a moving contact, and a stationary contact. The second operating shaft extends along the first direction, and the second operating linkage is connected to the second operating shaft. The two moving contacts are disposed on both sides of the second operating linkage in the first direction, and the stationary contact is disposed on the second copper busbar. The second operating shaft can rotate to make the moving contact and the stationary contact electrically connected or separated.

7. The environmentally friendly gas-insulated switchgear according to claim 6, characterized in that, The grounding switch includes a moving arc contact and a stationary arc contact. The moving arc contact includes a first end and a second end opposite to each other. The first end of the moving arc contact is connected to the moving contact. The two moving arc contacts are arranged on both sides of the two moving contacts in the first direction. The distance between the second end of the moving arc contact and the second operating shaft is greater than the distance between the moving contact and the second operating shaft. The two stationary arc contacts are arranged on both sides of the stationary contact in the first direction.

8. The environmentally friendly gas-insulated switchgear according to claim 7, characterized in that, The moving arc contact and the stationary arc contact are copper-tungsten alloy structural components.

9. The environmentally friendly gas-insulated switchgear according to claim 7, characterized in that, The grounding switch includes a stationary shield and a moving shield. The two stationary shields are disposed on both sides of the two stationary arc contacts in the first direction. The moving shield is disposed between the second operating shaft and the stationary contact. The moving shield has a clearance groove for the passage of the second operating linkage, the moving contact and the moving arc contact.

10. The environmentally friendly gas-insulated switchgear according to claim 6, characterized in that, The environmentally friendly gas-insulated switchgear includes a second operating mechanism, which is located in the mechanism chamber. The second operating shaft passes through the partition between the gas box and the mechanism chamber and is connected to the second operating mechanism. The second operating shaft and the partition are rotatably sealed together.

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