Gas insulated circuit breaker cabinet

Abstract

The utility model discloses a gas insulated circuit breaker cabinet, which comprises a cabinet body and a vacuum circuit breaker switch, the cabinet body comprises a gas box and a mechanism chamber, the mechanism chamber is provided with an operating mechanism, the vacuum circuit breaker switch is arranged in the gas box, the vacuum circuit breaker switch comprises a vacuum switch, the vacuum switch comprises a vacuum transmission device, and the operating mechanism is connected with the vacuum transmission device. The vacuum transmission device comprises a vacuum transmission part, and the vacuum transmission part is arranged to be of a multi-connecting-rod structure. Rotary motion output by the operating mechanism is converted into linear motion through the multi-connecting-rod vacuum transmission part and the main shaft; therefore, the moving end contact of the vacuum arc extinguish chamber of the vacuum switch is driven to perform breaking and closing actions in the linear direction to realize opening and closing, and compared with a conventional cam structure, the size is smaller, the weight is lighter, and the stroke adjusting range is larger.

Description

Technical Field

[0001] The utility model belongs to the field of electrical technology and relates to a gas insulated circuit breaker cabinet. Background Art

[0002] The circuit breaker can realize the opening and closing functions in the circuit through mechanism driving. In order to meet the application scenario requirements of higher voltage levels and improve the insulation performance of the main circuit of the vacuum circuit breaker, it is necessary to adjust the structure based on the existing vacuum circuit breaker.

[0003] The insulation performance of existing products cannot meet the working conditions of 40.5kV rated voltage in a gas insulation environment. Summary of the invention

[0004] In order to overcome at least one deficiency of the prior art, the utility model provides a gas insulated circuit breaker cabinet.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a gas insulated circuit breaker cabinet, including a cabinet body and a vacuum circuit breaker switch, the cabinet body includes a gas box and a mechanism chamber, the mechanism chamber is provided with an operating mechanism, the vacuum circuit breaker switch is arranged in the gas box, the vacuum circuit breaker switch includes a vacuum switch, the vacuum switch includes a vacuum transmission device, the operating mechanism is connected to the vacuum transmission device, the vacuum transmission device includes a vacuum transmission component, and the vacuum transmission component is arranged as a multi-link structure.

[0006] Furthermore, the air box includes two groups of side panels and a front panel, a rear panel, an upper top panel and a lower top panel connected thereto. The spacing between the two groups of side panels is smaller than the width of the front panel, the rear panel, the upper top panel and the lower top panel, and the intersection of the side panels and the front panel, the rear panel, the upper top panel and the lower top panel is retracted.

[0007] Furthermore, the vacuum circuit breaker switch also includes two groups of vacuum side plates, the vacuum switch is connected between the two groups of vacuum side plates, and the vacuum side plates are provided with a plurality of vacuum creepage slots.

[0008] Furthermore, the vacuum switch includes a vacuum arc extinguishing device, which includes a pressure-maintaining transmission component, an insulator and a vacuum arc extinguishing chamber. The pressure-maintaining transmission component, the insulator and the vacuum arc extinguishing chamber are arranged from top to bottom, and the pressure-maintaining transmission component is connected to the vacuum transmission component.

[0009] Furthermore, the vacuum circuit breaker switch includes an isolating switch, which is connected to the vacuum switch. The isolating switch includes an isolating switch frame and an isolating switch main shaft. The isolating switch main shaft is connected to the operating mechanism and the isolating switch frame through a dynamic sealing device, and a steel sleeve is provided between the isolating switch main shaft and the dynamic sealing device.

[0010] Furthermore, the vacuum transmission device includes a main shaft and a connecting rod frame, the vacuum transmission components and the main shaft are arranged on the connecting rod frame, the main shaft is connected to the operating mechanism, the connecting rod frame is fixed to the vacuum side plate, and the vacuum transmission components are respectively connected to the main shaft and the vacuum arc extinguishing device.

[0011] Furthermore, the moving end of the vacuum arc chamber is connected to a current-carrying conductor, and an arc chamber guide plate for installing the vacuum arc chamber is fixed between the vacuum side plates. The current-carrying conductor is overlapped with the arc chamber guide plate, and the current-carrying conductor is connected to the main busbar, and the main busbar is connected to the insulating bushing. The current-carrying conductor is located between the insulator and the vacuum arc chamber, and the insulator isolates the current-carrying conductor from the vacuum transmission component.

[0012] Furthermore, the isolating switch frame is fixedly connected to the gas box, and the isolating switch frame is provided with an insulating crossbeam, and the insulating crossbeam is provided with a plurality of crossbeam slots.

[0013] Furthermore, the isolating switch includes a buffer device, an isolating switch transmission component, and an isolating switch moving knife. The buffer device includes a main shaft buffer structure and a moving knife pull plate. The main shaft buffer structure is arranged on the isolating switch main shaft. The isolating switch transmission component is connected to the isolating switch moving knife through the moving knife pull plate, and the isolating switch transmission component is connected to the isolating switch main shaft.

[0014] Furthermore, it also includes a grounding copper busbar mechanism, the cabinet also includes a pressure relief chamber and a cable chamber, the pressure relief chamber and the cable chamber are arranged below the gas box, the grounding copper busbar mechanism includes a grounding nut, and the grounding copper busbar mechanism is distributed along the gas box, the pressure relief chamber and the cable chamber through the grounding nut.

[0015] In summary, the utility model is beneficial in that:

[0016] 1) The utility model converts the rotational motion outputted from the operating mechanism into linear motion through the vacuum transmission components and the main shaft of the multi-link, so as to drive the moving end contact of the vacuum interrupter of the vacuum switch to disconnect and close in the linear direction to realize opening and closing. Compared with the conventional cam structure, the utility model has a smaller volume, lighter weight, and a larger stroke adjustment range, thereby providing a greater force for the vacuum interrupter to perform its closing and opening operations, meeting the requirements of 40.5kV circuit breakers.

[0017] 2) The utility model isolates the current-carrying conductor from the vacuum transmission component through an insulator, which is beneficial to the uniform distribution of the electric field of the vacuum circuit breaker switch. At the same time, the isolating static contact is directly installed in the closing position. When the movable knife of the isolating switch moves to the closing position, it closes with the isolating static contact to eliminate the arc extinguishing grid, enhance the overall insulation performance, and reduce the risk of phenomena such as breakdown of the gas insulation gap. In addition, the isolating static contact is provided with an isolating static contact shielding cover, the movable knife seat is provided with a movable knife seat shielding cover, and the movable knife is provided with a movable knife shielding cover. The shape of each shielding cover is smooth, so that the electric field distribution in the space around the conductor is more uniform, which is beneficial to enhancing the overall insulation performance of the vacuum circuit breaker switch, thereby greatly improving the insulation performance of the vacuum circuit breaker switch and meeting the requirements of 40.5kV circuit breakers.

[0018] 3) The insulating crossbeam of the utility model is a part of the disconnector frame and is provided with a plurality of crossbeam slots, which can remove components such as insulators used to isolate metal frames of different potentials from conductors, thereby helping to compress the height of the disconnector in the vertical direction, reduce the overall volume of the gas box, and facilitate production and manufacturing.

[0019] 4) The utility model directly installs the isolating static contact in the closing position. When the movable knife of the isolating switch moves to the closing position, it closes with the isolating static contact, eliminates the arc extinguishing grid, enhances the overall insulation performance, and reduces the risk of breakdown of the gas insulation gap and the like.

[0020] 5) The utility model effectively avoids the situation in which the movable blade of the isolating switch is over-positioned when closing or not moved properly when grounding, thereby preventing the occurrence of poor contact with the static contact, through the buffer device.

[0021] 6) A steel sleeve is provided between the isolating switch main shaft and the dynamic sealing device of the utility model, and the transmission clearance between the dynamic sealing device and the isolating switch main shaft is reduced by the steel sleeve, and at the same time, the wear of the isolating switch main shaft is reduced after the isolating switch is actuated for a certain number of times.

[0022] 7) The grounding copper bar mechanism of the utility model is distributed along the gas box, the pressure relief chamber and the cable chamber through the grounding nut to enhance the ability of the grounding to carry the fault current of the loop. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of a gas insulated circuit breaker cabinet of the utility model.

[0024] Figure 2 This is a schematic diagram of the interior of a gas insulated circuit breaker cabinet of the utility model.

[0025] Figure 3 It is a side view of the gas insulated circuit breaker cabinet of the utility model.

[0026] Figure 4 It is a schematic diagram of the air box of the utility model.

[0027] Figure 5 It is a cross-sectional view of the air box of the utility model.

[0028] Figure 6 For this utility model Figure 5 A is an enlarged schematic diagram.

[0029] Figure 7 For this utility model Figure 5 A magnified schematic diagram of B.

[0030] Figure 8 This is a schematic diagram of a vacuum circuit breaker switch of the present utility model.

[0031] Fig. 9 It is a side view of the switch structure of the vacuum circuit breaker of the utility model.

[0032] Fig.10 The utility model is a schematic diagram of the switch structure of the vacuum circuit breaker.

[0033] Fig.11 It is a schematic diagram of the connecting rod frame of the utility model.

[0034] Fig.12 It is a schematic diagram of the grounding static contact of the utility model.

[0035] Fig.13 It is a schematic diagram of the assembly of the isolating switch transmission component and the isolating switch moving knife of the utility model.

[0036] Fig.14 It is a schematic diagram of the movable knife and pull plate of the utility model.

[0037] Fig.15 This is a schematic diagram of the disconnector in the utility model in the closed state.

[0038] Fig.16 It is a schematic diagram of the disconnecting state of the isolating switch of the present utility model.

[0039] Fig.17 It is a schematic diagram of the grounding state of the isolating switch of the utility model.

[0040] Fig.18 It is a schematic diagram of the grounding copper bar mechanism of the utility model.

[0041] Fig.19 It is a schematic diagram of the connection between the grounding copper bar mechanism and the partition of the utility model.

[0042] Symbols in the figure: cabinet 1, vacuum transmission device 2, vacuum arc extinguishing device 3, disconnector 4, grounding copper bar mechanism 5, vacuum side plate 7, dynamic sealing device 8, mechanism room 11, cable room 12, gas box 13, pressure relief chamber 14, main shaft 20, connecting rod frame 21, vacuum transmission component 22, pressure-maintaining transmission component 31, insulator 32, current-carrying conductor 33, arc extinguishing chamber guide plate 34, vacuum arc extinguishing chamber 35, arc extinguishing chamber static end support plate 36, isolation static contact 37, isolation static contact Shielding cover 38, isolating switch main shaft 40, isolating switch frame 41, isolating switch transmission component 42, contact assembly 43, moving knife seat 44, isolating switch moving knife 48, grounding nut 50, first grounding bar 51, second grounding bar 52, third grounding bar 53, fourth grounding bar 54, fifth grounding bar 55, nut 56, insulating sleeve 61, main busbar 62, vacuum creepage slot 71, steel sleeve 81, front plate 131, rear plate 132, upper top plate 133, lower top plate 13 4. Two sets of side plates 135, cavity 136, outer frame 210, first transmission frame 211, connecting rod shaft pin transmission plate 212, second buffer groove 213, crank arm 221, intermediate connecting rod 222, transmission connecting rod 223, fourth connecting rod 224, moving end pull rod 311, pressure retaining sleeve 312, pressure retaining spring 313, disconnector frame side plate 411, insulating beam 412, beam slot 413, disconnector grounding beam 414, grounding bar 415, limiter 420, Transmission crank arm 421, crank arm baffle 422, movable knife pull rod 423, limit sleeve 424, grounding static contact 431, movable knife seat shielding cover 441, movable knife shielding cover 481, spindle buffer structure 491, movable knife pull plate 492, input end 493, output end 494, protrusion 495, first end 501, second end 502, first buffer groove 2231, grounding static contact mounting portion 4311, grounding mounting hole 4312, grounding static contact action portion 4313. DETAILED DESCRIPTION

[0043] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0044] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0045] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0046] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0047] Embodiment 1:

[0048] like Figure 1-Figure 19 As shown, a gas insulated circuit breaker cabinet includes a cabinet body 1 and a vacuum circuit breaker switch. The cabinet body 1 includes an instrument room (not shown), a mechanism room 11, a cable room 12, a gas box 13 and a pressure relief room 14. The vacuum circuit breaker switch is installed in the gas box 13.

[0049] like Figure 1 As described above, a coordinate system is established to facilitate the definition of directions, wherein the x-axis is the width direction of the gas insulated circuit breaker cabinet, i.e., the front-to-back direction, the y-axis is the length direction of the gas insulated circuit breaker cabinet, i.e., the left-to-right direction, and the z-axis is the height direction of the gas insulated circuit breaker cabinet, i.e., the up-down direction.

[0050] The air box 13 is configured as a box structure assembled from a number of plates, the width direction of the air box 13 is the x-axis direction in the figure, the air box 13 includes a front plate 131, a rear plate 132, an upper top plate 133, a lower top plate 134 and two groups of side plates 135, the front plate 131 and the rear plate 132 are distributed in parallel in the y-axis direction, the two groups of side plates 135 are distributed in parallel in the x-axis direction, the upper top plate 133 and the lower top plate 134 are distributed in parallel in the z-axis direction, in this embodiment, the front plate 131 is connected to the mechanism chamber 11, and the lower top plate 134 is connected to the cable chamber 12, thereby constituting an assembly of the air box 13 with the mechanism chamber 11, the cable chamber 12 and the pressure relief chamber 14.

[0051] The spacing between the two groups of side panels 135 in the x-axis direction is smaller than the width of the front panel 131, the rear panel 132, the upper top panel 133 and the lower top panel 134 in the x-axis direction, so that the intersection of the side panels 135 and the front panel 131, the rear panel 132, the upper top panel 133 and the lower top panel 134 is retracted, so that the side panels 135 and the front panel 131, the rear panel 132, the upper top panel 133 and the lower top panel 134 form a concave cavity 136, and the weld scar generated when the fillet welding is performed at the intersection is located in the cavity 136. When the gas boxes 13 are connected in cabinets, the front panels 131, the rear panels 132, the upper top panel 133 and the lower top panel 134 of different gas boxes 13 can be connected in cabinets, thereby avoiding the influence of weld scars on the connection of gas boxes, facilitating the connection of gas boxes and improving the neatness of the connection of gas boxes.

[0052] In this embodiment, the vacuum circuit breaker switch includes a vacuum switch and an isolating switch 4, which are connected from top to bottom. The mechanism chamber 11 is provided with a plurality of operating mechanisms, and the vacuum switch and the isolating switch 4 are respectively connected to the corresponding operating mechanisms. The corresponding operating mechanisms are the operating mechanisms of conventional circuit breaker cabinets. This application does not make any improvements to this, and will not be elaborated here.

[0053] The vacuum switch includes a vacuum transmission device 2 and a vacuum interrupter 3, the vacuum transmission device 2 is connected to the vacuum interrupter 3, and the vacuum interrupter 3 is connected to the disconnector 4.

[0054] The vacuum circuit breaker switch also includes a vacuum side panel 7, which is provided with two groups of vacuum side panels 7, and the two groups of vacuum side panels 7 are arranged in parallel. The three vacuum transmission devices 2 and the vacuum arc extinguishing devices 3 are connected between the two groups of vacuum side panels 7. The vacuum side panel 7 is provided with a plurality of vacuum creepage slots 71, and the creepage distance is increased by the vacuum creepage slots 71.

[0055] Preferably, the vacuum side panel 7 is made of FR4 insulating material.

[0056] The vacuum transmission device 2 includes a main shaft 20, a connecting rod frame 21 and a vacuum transmission component 22. The main shaft 20 is connected to the operating mechanism located in the mechanism chamber 11. The connecting rod frame 21 is fixed to the vacuum side plate 7. The vacuum transmission component 22 is respectively connected to the main shaft 20 and the vacuum arc extinguishing device 3. The vacuum transmission device 2 is used to transmit the movement of the operating mechanism to the vacuum arc extinguishing device 3 to realize the opening and closing operations of the vacuum arc extinguishing device 3.

[0057] Preferably, the main axis 20 is a hexagonal prism structure.

[0058] Preferably, the main shaft 20 is made of metal.

[0059] The connecting rod frame 21 includes an outer frame 210, a first transmission frame 211 and a connecting rod axle pin transmission plate 212. The first transmission frame 211 and the connecting rod axle pin transmission plate 212 are respectively fixed on the outer frame 210. The first transmission frame 211 and the connecting rod axle pin transmission plate 212 are respectively provided with three groups. The first transmission frame 211 is rotatably provided with a hexagonal bushing (not marked in the figure). The main shaft 20 passes through the three groups of hexagonal bushings in sequence. The main shaft 20 is limited and guided by the hexagonal bushings, and the central axis of the main shaft 20 is distributed along the y-axis.

[0060] The vacuum transmission component 22 is connected to the connecting rod frame 21. Specifically, the vacuum transmission component 22 is located between the first transmission frame 211 and the connecting rod shaft pin transmission plate 212. The vacuum transmission component 22 includes a crank arm 221, an intermediate connecting rod 222, a transmission connecting rod 223 and a fourth connecting rod 224. The input end of the crank arm 221 is fixedly connected to the main shaft 20, the output end of the crank arm 221 is rotatably connected to the input end of the intermediate connecting rod 222, the output end of the intermediate connecting rod 222 is rotatably connected to the input end of the transmission connecting rod 223, and the output end of the transmission connecting rod 223 is rotatably connected to the first transmission frame 211. The transmission connecting rod 223 is rotatably connected to the connecting rod shaft pin transmission plate 212, and a first buffer groove 2231 is provided in the middle of the transmission connecting rod 223, and the first buffer groove 2231 is distributed along the front-to-back direction. The fourth connecting rod 224 is located in the first buffer groove 2231 and can slide forward and backward along the first buffer groove 2231. The first transmission frame 211 and the connecting rod shaft pin transmission plate 212 are provided with a second buffer groove 213, and the second buffer groove 213 is distributed along the up-down direction. The fourth connecting rod 224 is located in the second buffer groove 213 and can slide forward and backward along the second buffer groove 213. The fourth connecting rod 224 is connected to the moving end pull rod of the vacuum arc extinguishing device 3.

[0061] The crank arm 221 , the intermediate connecting rod 222 , the transmission connecting rod 223 and the fourth connecting rod 224 are made of metal.

[0062] The movement process of the vacuum transmission component 22 is as follows: the operating mechanism transmits the opening movement to the main shaft 20, and the main shaft 20 moves along the Fig. 9 The fourth connecting rod 224 is moved upward through the crank arm 221, the intermediate connecting rod 222 and the transmission connecting rod 223, thereby driving the vacuum arc extinguishing device 3 to disconnect and realize the opening of the circuit breaker, or the operating mechanism transmits the closing motion to the main shaft 20, and the main shaft 20 moves along the direction of the arrow b shown in the figure. Fig. 9 The circuit breaker rotates in the direction of the pointer arrow a, and the fourth connecting rod 224 is moved downward through the crank arm 221, the intermediate connecting rod 222, and the transmission connecting rod 223, thereby driving the vacuum arc extinguishing device 3 to close, thereby achieving circuit breaker closing.

[0063] In this embodiment, the rotational motion outputted from the operating mechanism is converted into linear motion through the multi-link vacuum transmission component 22 and the main shaft 20, so as to drive the vacuum arc extinguishing device 3 to break and close in the linear direction to realize opening and closing. Compared with the conventional cam structure, it has a smaller size, lighter weight, and a larger stroke adjustment range.

[0064] In this embodiment, the vacuum transmission device 2 can be used alone in existing equipment. The unexplained structures of the vacuum transmission device 2 use existing components and are not described here.

[0065] The vacuum arc extinguishing device 3 comprises a pressure-maintaining transmission component 31 , an insulator 32 and a vacuum arc extinguishing chamber 35 , which are arranged from top to bottom.

[0066] An arc extinguishing chamber guide plate 34 and an arc extinguishing chamber static end support plate 36 are fixedly provided between the vacuum side plates 7 . The arc extinguishing chamber guide plate 34 and the vacuum arc extinguishing chamber 35 are fixedly connected. The arc extinguishing chamber static end support plate 36 is arranged at the lower end of the vacuum arc extinguishing chamber 35 to support the vacuum arc extinguishing chamber 35 .

[0067] An isolating static contact 37 is fixedly provided on the static end support plate 36 of the arc extinguishing chamber. One end of the isolating static contact 37 is fixedly connected to the static end of the vacuum arc extinguishing chamber 35, and the other end is a free end facing the isolating switch 4. The isolating static contact 37 is provided with an isolating static contact shielding cover 38. The isolating static contact shielding cover 38 has a smooth shape, so that the electric field distribution in the space around the conductor is more uniform, which is beneficial to enhancing the overall insulation performance of the vacuum circuit breaker switch.

[0068] The pressure-maintaining transmission component 31 includes a moving end pull rod 311, a pressure-maintaining sleeve 312 and a pressure-maintaining spring 313. One end of the moving end pull rod 311 is connected to the vacuum transmission component 22, and the other end is fixedly connected to the moving contact of the vacuum arc extinguishing chamber 35. The vacuum transmission component 22 moves up and down to drive the moving end pull rod 311 and the contact to move up and down, thereby realizing the opening and closing operation.

[0069] The insulator 32 is located between the pressure-maintaining transmission component 31 and the vacuum interrupter 35 , and is connected to the pressure-maintaining transmission component 31 and the vacuum interrupter 35 , respectively. The vacuum transmission component 22 synchronously drives the insulator 32 to move up and down.

[0070] The moving end of the vacuum arc chamber 35 is connected to a current-carrying conductor 33, which is overlapped with the arc chamber guide plate 34. The current-carrying conductor 33 is connected to the main busbar 62, and the main busbar 62 is connected to the insulating sleeve 61. The current-carrying conductor 33 is located between the insulator 32 and the vacuum arc chamber 35. The insulator 32 isolates the current-carrying conductor 33 from the vacuum transmission component 22, which is beneficial to the uniform distribution of the switch electric field of the vacuum circuit breaker.

[0071] In this embodiment, Figure 8As shown, a plurality of vacuum creepage slots 71 are distributed between the switches of the vacuum circuit breaker, between the pressure-retaining springs 313, between metal parts of different potentials and on the side of the vacuum side plate 7, which not only facilitates the height measurement of the pressure-retaining springs 313 and the moving end of the vacuum arc extinguishing chamber 35 and obtains the overtravel opening distance parameters, but also avoids the surface creepage phenomenon of the vacuum side plate 7.

[0072] The isolating switch 4 includes an isolating switch frame 41 and an isolating switch main shaft 40. The isolating switch main shaft 40 penetrates the isolating switch frame 41 and extends to the mechanism chamber 11 to be connected to the operating mechanism. The isolating switch main shaft 40 is connected to the operating mechanism through a dynamic sealing device 8. A steel sleeve 81 is provided between the isolating switch main shaft 40 and the dynamic sealing device 8. The steel sleeve 81 reduces the transmission clearance between the dynamic sealing device 8 and the isolating switch main shaft 40, and at the same time reduces the wear of the isolating switch main shaft 40 after the isolating switch 4 is actuated a certain number of times.

[0073] The isolating switch main shaft 40 is configured as a hexagonal shaft structure, and the steel sleeve 81 is a matching hexagonal steel sleeve.

[0074] The isolating switch frame 41 is fixedly connected to the gas box 13 . The isolating switch frame 41 includes isolating switch frame side plates 411 and insulating beams 412 . The insulating beams 412 are respectively fixedly connected to two groups of isolating switch frame side plates 411 . The isolating switch frame side plates 411 are fixedly connected to the vacuum side plates 7 .

[0075] according to Figure 8 From a visual perspective, the two sets of isolating switch frame side plates 411 are distributed along the y-axis and are arranged parallel to the length direction of the insulating beam 412.

[0076] The insulating beam 412 is arranged parallel to the static end support plate 36 of the arc extinguishing chamber. The insulating beam 412 is provided with a plurality of beam slots 413. The beam slots 413 are long strip structures. The creepage distance is increased and the electric field distribution is optimized through the beam slots 413. In the present application, the insulating beam 412 is a part of the isolating switch frame 41 and is provided with a plurality of beam slots 413. Insulators and other components used to isolate metal frames of different potentials from conductors can be removed, which is beneficial to compressing the height of the isolating switch in the vertical direction and reducing the occupied volume of the circuit breaker cabinet.

[0077] Preferably, a plurality of beam slots 413 are distributed in an array along the length direction thereof in the middle and on both sides of the insulating beam 41 , and the length direction of the beam slots 413 is perpendicular to the length direction of the insulating beam 412 .

[0078] An isolating switch grounding beam 414 is fixedly disposed between the two sets of isolating switch frame side plates 411 , and the isolating switch grounding beam 414 is fixedly provided with a grounding bar 415 distributed along its length.

[0079] The isolating switch 4 also includes a buffer device, an isolating switch transmission component 42, and an isolating switch moving knife 48. The buffer device includes a main shaft buffer structure 491 and a moving knife pull plate 492. The main shaft buffer structure 491 is arranged on the isolating switch main shaft 40. The isolating switch transmission component 42 is connected to the isolating switch moving knife 48 through the moving knife pull plate 492. The isolating switch transmission component 42 is connected to the isolating switch main shaft 40. The isolating switch main shaft 40 transmits the movement of the operating mechanism to the isolating switch transmission component 42, so as to realize the opening, closing and grounding operations of the isolating switch 4. Fig.15 As shown, when the isolating switch 4 is closed, the main shaft buffer structure 491 and the movable knife pull plate 492 are against each other for buffering. When the isolating switch 4 is closed, the main shaft buffer structure 491 and the movable knife pull plate 492 collide with each other. The main shaft buffer structure 491 absorbs part of the kinetic energy and prevents the movable knife 48 of the isolating switch from over-positioning when closing. Fig.17 As shown, when the isolating switch 4 is grounded, the isolating switch transmission component 42 controls the isolating switch moving knife 48 to the grounding position through the moving knife pull plate 492. During the grounding action, the power generated by the rotation of the isolating switch moving knife 48 is partially absorbed by the moving knife pull plate 492, thereby reducing the impact caused by the isolating switch moving knife 48 moving to the grounding position, avoiding the occurrence of poor contact between the isolating switch moving knife 48 and the grounding static contact caused by rebound during the grounding action of the isolating switch moving knife 48.

[0080] Preferably, the main shaft buffer structure 491 adopts a buffer pad.

[0081] The movable knife pull plate 492 includes an input end 493 and an output end 494. The output end 494 is rotationally connected to the middle part of the movable knife 48 of the isolating switch, and the input end 493 is rotationally connected to the isolating switch transmission component 42. The input end 493 is provided with a protrusion 495. The protrusion 495 faces the main shaft buffer structure 491 and collides with the main shaft buffer structure 491 when the switch is in the closed state.

[0082] The present application uses a buffer device to effectively prevent the disconnector moving knife 48 from being over-positioned when closing or not moving in place when grounding, resulting in poor contact with the static contact. At the same time, the present application sets the main shaft buffer structure 491 on the disconnector main shaft 40, and the moving knife pull plate 492 is set in the middle of the disconnector moving knife 48. Compared with the existing method of setting the buffer device at the rear end of the isolating static contact 37 to limit the final position, the present embodiment uses the buffer device to absorb the kinetic energy generated by the disconnector moving knife 48 during the closing and grounding actions, thereby preventing the disconnector moving knife 48 from being over-positioned when closing or not moving in place when grounding, thereby preventing the disconnector moving knife 48 from being in poor contact with the static contact. The occurrence of poor contact with the static contact due to inadequate grounding action can effectively improve the action stability and reliability; to meet the needs of 40.5kV circuit breakers, the movable knife 48 of the disconnector needs to be increased in length to obtain a stronger driving force and a stronger impact force. The present application can absorb the kinetic energy generated by the movable knife 48 of the disconnector during the closing and grounding action switching through a buffer device, which can reduce the stress on components, improve the mechanical transmission efficiency, ensure the reliability of the switching of the disconnector state, and make the disconnector meet the gas-insulated vacuum circuit breaker cabinet with a rated voltage of 40.5kV.

[0083] The isolating switch transmission component 42 includes a transmission crank arm 421 and a moving knife pull rod 423. One end of the transmission crank arm 421 is rotatably connected to one end of the moving knife pull rod 423, and the other end is fixedly connected to the isolating switch main shaft 40. The other end of the moving knife pull rod 423 is rotatably connected to the moving knife pull plate 492. The isolating switch main shaft 40 transmits power to the isolating switch moving knife 48 through the isolating switch transmission component 42.

[0084] There are two groups of transmission crank arms 421 and movable knife pull rods 423 respectively, and the two groups of transmission crank arms 421 and movable knife pull rods 423 are fixedly connected by pins to achieve synchronous movement.

[0085] A crank arm baffle 422 is also provided on the outside of the two sets of transmission crank arms 421. The crank arm baffle 422 is set on the main shaft of the disconnector 40. A limit member 420 is also provided on the outside of the crank arm baffle 422. The limit member 420 is fixed on the main shaft of the disconnector 40 and limits the crank arm baffle 422 on both sides, so that the transmission crank arm 421 is stably fixed on the main shaft of the disconnector 40.

[0086] Preferably, the stopper 420 is a fastener such as a screw or a bolt;

[0087] Preferably, the limiting member 420 is made of non-metallic material, such as reinforced nylon.

[0088] The spindle buffer structure 491 is arranged between the two sets of transmission crank arms 421 , the movable knife pull plate 492 is located between the two sets of movable knife pull rods 423 , and a limiting sleeve 424 is further arranged between the movable knife pull plate 492 and the two sets of movable knife pull rods 423 .

[0089] The movable knife 48 of the isolating switch is arranged on the insulating cross beam 412, and the movable knife seat 44 is fixedly provided on the insulating cross beam 412. One end of the movable knife 48 of the isolating switch is rotatably connected to the movable knife seat 44, and the other end of the movable knife 48 of the isolating switch is set as a free end, and a movable knife shielding cover 481 is provided at the free end. The movable knife shielding cover 481 has a smooth shape, so that the electric field distribution in the space around the conductor is more uniform, which is beneficial to enhancing the overall insulation performance of the isolating switch 4.

[0090] The isolating switch movable knife 48 can rotate around the rotation center of the isolating switch movable knife 48, and the rotation center of the isolating switch movable knife 48 is close to the isolating switch main shaft 40. Compared with the existing isolating switch movable knife, this embodiment shortens the relative distance between the rotation center of the isolating switch movable knife 48 and the isolating switch main shaft 40. On the premise of ensuring sufficient safety insulation gap, redundant volume is eliminated. The relative distances of different types of cabinets are different and can be set according to actual conditions.

[0091] The fixing stud of the movable knife seat 44 is provided with a movable knife seat shielding cover 441, which is fixed to the insulating beam 412. The movable knife seat shielding cover 441 has a smooth shape, so that the electric field distribution in the space around the conductor is more uniform, which is beneficial to enhance the overall insulation performance of the disconnector 4.

[0092] The isolating switch moving blade 48 is connected to the isolating switch main shaft 40 through the isolating switch transmission component 42. The isolating switch main shaft 40 transmits the movement of the operating mechanism to the isolating switch moving blade 48 through the isolating switch transmission component 42. The isolating switch moving blade 48 switches the grounding, isolation or closing position, thereby realizing the grounding, opening and closing states of the isolating switch 4.

[0093] The isolating switch 4 also includes a contact assembly 43, which includes a grounding static contact 431 and an isolating static contact 37. The grounding static contact 431 is fixed to the grounding bar 415. When the movable knife 48 of the isolating switch moves to the closing position, it closes with the isolating static contact 37. When the movable knife 48 of the isolating switch moves to the grounding position, it closes with the grounding static contact 431 for grounding.

[0094] In the present application, the isolating static contact 37 is directly installed in the closing position. When the movable knife 48 of the isolating switch moves to the closing position, it closes with the isolating static contact 37, eliminating the arc extinguishing grid frame, enhancing the overall insulation performance, and reducing the risk of phenomena such as breakdown of the gas insulation gap.

[0095] The grounding static contact 431 includes a grounding static contact mounting portion 4311 and a grounding static contact action portion 4313 . The grounding static contact mounting portion 4311 is fixedly connected to the grounding bar 415 , and the grounding static contact action portion 4313 is connected to or separated from the movable blade 48 of the isolating switch.

[0096] The grounding static contact mounting portion 4311 and the grounding static contact action portion 4313 are vertically connected to form a T-shaped structure. Preferably, the grounding static contact action portion 4313 is located in the middle of the grounding static contact mounting portion 4311, and grounding mounting holes 4312 for installation are provided on both sides of the grounding static contact mounting portion 4311.

[0097] In this embodiment, the isolating switch 4 can be used alone in existing equipment. The unexplained structure of the isolating switch 4 adopts existing components and will not be described in detail here.

[0098] The gas insulated circuit breaker cabinet further comprises a grounding copper bar mechanism 5 , which comprises a grounding nut 50 , and the grounding copper bar mechanism 5 is distributed along the gas box 12 , the pressure relief chamber 14 and the cable chamber 12 through the grounding nut 50 .

[0099] The grounding copper bar mechanism 5 also includes a first grounding bar 51, a second grounding bar 52, a third grounding bar 53, a fourth grounding bar 54 and a fifth grounding bar 55. The first grounding bar 51 is located in the gas box 13 and overlaps with the grounding bar 415. The second grounding bar 52 is located in the pressure relief chamber 14. The first grounding bar 51 and the second grounding bar 52 are connected by a grounding nut 50. The fourth grounding bar 54 is located in the cable chamber 12. The third grounding bar 53 spans the pressure relief chamber 14 and the cable chamber 12 and overlaps with the second grounding bar 52 and the fourth grounding bar 54 respectively. One end of the fifth grounding bar 55 overlaps with the fourth grounding bar 54, and the other end extends to the outside of the circuit breaker cabinet for cabinet connection. The grounding copper bar mechanism 5 of the present application is distributed along the gas box 12, the pressure relief chamber 14 and the cable chamber 12 through the grounding nut 50 to enhance the ability of the grounding to carry the fault current of the loop.

[0100] The grounding nut 50 is fixedly mounted on the partition between the air box 13 and the pressure relief chamber 14, and is used to connect the first grounding bar 51 located in the air box 13 and the second grounding bar 52 located in the pressure relief chamber 14. Specifically, the grounding nut 50 includes a first end 501 and a second end 502. The first end 501 and the second end 502 are fixedly connected. The outer diameter of the first end 501 is smaller than the outer diameter of the second end 502. The first end 501 is fastened with a nut 56, so that the grounding nut 50 is fastened to the partition between the air box 13 and the pressure relief chamber 14. The first end 501 is located in the air box 13 and is connected to the first grounding bar 51, and the second end 502 is located in the pressure relief chamber 14 and is connected to the second grounding bar 52.

[0101] The present application converts the rotational motion outputted from the operating mechanism into linear motion through a multi-link vacuum transmission component 22 and a main shaft 20, so as to drive the vacuum arc extinguishing device 3 to realize opening and closing by breaking and closing actions in a linear direction. Compared with a conventional cam structure, the device has a smaller size, lighter weight, and a larger adjustable range of travel. In the present application, the insulating crossbeam 412 is a part of the isolating switch frame 41 and is provided with a plurality of crossbeam slots 413, which can remove components such as insulators used to isolate metal frames of different potentials from conductors, thereby facilitating compression of the height of the isolating switch in the vertical direction, reducing the overall volume of the gas box, and facilitating production and manufacturing. The present application directly installs the isolating static contact 37 in the closing position, and when the isolating switch moving knife 48 moves to the closing position, it closes with the isolating static contact 37 to close the switch, thereby eliminating the arc extinguishing grid frame, enhancing the overall insulation performance, and reducing the breakdown gas. The risk of the occurrence of phenomena such as insulation gaps; the present application effectively avoids the occurrence of poor contact with the static contact due to the moving knife 48 of the isolating switch being over-positioned when closing the switch or not moving in place when grounding through a buffer device; the present application adjusts the appearance of the moving knife seat shielding cover 441, the moving knife shielding cover 481, and the isolating static contact shielding cover 38 to be smooth, so that the electric field distribution in the space around the conductor is more uniform, which is beneficial to enhancing the overall insulation performance of the vacuum circuit breaker switch; the present application provides a steel sleeve 81 between the isolating switch main shaft 40 and the dynamic sealing device 8, and the steel sleeve 81 reduces the transmission gap between the dynamic sealing device 8 and the isolating switch main shaft 40, and at the same time reduces the wear of the isolating switch main shaft 40 after the isolating switch 4 is actuated a certain number of times; the grounding copper busbar mechanism 5 of the present application is distributed along the air box 12, the pressure relief chamber 14 and the cable chamber 12 through the grounding nut 50 to enhance the ability of the grounding to carry the fault current of the circuit.

[0102] The structures of the circuit breaker cabinet not described in this embodiment use existing components and will not be described in detail here.

[0103] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A gas insulated circuit breaker cabinet, characterized in that: It includes a cabinet and a vacuum circuit breaker switch. The cabinet includes a gas box and a mechanism room. The mechanism room is provided with an operating mechanism. The vacuum circuit breaker switch is arranged in the gas box. The vacuum circuit breaker switch includes a vacuum switch. The vacuum switch includes a vacuum transmission device. The operating mechanism is connected to the vacuum transmission device. The vacuum transmission device includes a vacuum transmission component. The vacuum transmission component is arranged as a multi-link structure.

2. A gas insulated circuit breaker cabinet according to claim 1, characterized in that: The air box includes two groups of side panels and a front panel, a rear panel, an upper top panel and a lower top panel connected thereto. The spacing between the two groups of side panels is smaller than the width of the front panel, the rear panel, the upper top panel and the lower top panel, and the intersection positions of the side panels and the front panel, the rear panel, the upper top panel and the lower top panel are retracted.

3. A gas insulated circuit breaker cabinet according to claim 1, characterized in that: The vacuum circuit breaker switch also includes two groups of vacuum side plates, the vacuum switch is connected between the two groups of vacuum side plates, and the vacuum side plates are provided with a plurality of vacuum creepage slots.

4. A gas insulated circuit breaker cabinet according to claim 1, characterized in that: The vacuum switch comprises a vacuum arc extinguishing device, which comprises a pressure-maintaining transmission component, an insulator and a vacuum arc extinguishing chamber. The pressure-maintaining transmission component, the insulator and the vacuum arc extinguishing chamber are arranged from top to bottom, and the pressure-maintaining transmission component is connected to the vacuum transmission component.

5. A gas insulated circuit breaker cabinet according to claim 1, characterized in that: The vacuum circuit breaker switch includes an isolating switch, which is connected to the vacuum switch. The isolating switch includes an isolating switch frame and an isolating switch main shaft. The isolating switch main shaft is connected to the operating mechanism and the isolating switch frame through a dynamic sealing device, and a steel sleeve is provided between the isolating switch main shaft and the dynamic sealing device.

6. A gas insulated circuit breaker cabinet according to claim 1, characterized in that: The vacuum transmission device comprises a main shaft and a connecting rod frame, wherein the vacuum transmission components and the main shaft are arranged on the connecting rod frame, the main shaft is connected to the operating mechanism, the connecting rod frame is fixed on the vacuum side plate, and the vacuum transmission components are respectively connected to the main shaft and the vacuum arc extinguishing device.

7. A gas insulated circuit breaker cabinet according to claim 4, characterized in that: The moving end of the vacuum interrupter is connected with a current-carrying conductor, an interrupter guide plate for installing the vacuum interrupter is fixed between the vacuum side plates, the current-carrying conductor is overlapped with the interrupter guide plate, the current-carrying conductor is connected to the main busbar, the main busbar is connected to the insulating bushing, the current-carrying conductor is located between the insulator and the vacuum interrupter, and the insulator isolates the current-carrying conductor from the vacuum transmission component.

8. A gas insulated circuit breaker cabinet according to claim 5, characterized in that: The isolating switch frame is fixedly connected to the gas box, and the isolating switch frame is provided with an insulating crossbeam, and the insulating crossbeam is provided with a plurality of crossbeam slots.

9. A gas insulated circuit breaker cabinet according to claim 5, characterized in that: The isolating switch comprises a buffer device, an isolating switch transmission component, and an isolating switch moving knife. The buffer device comprises a main shaft buffer structure and a moving knife pull plate. The main shaft buffer structure is arranged on the isolating switch main shaft. The isolating switch transmission component is connected to the isolating switch moving knife through the moving knife pull plate. The isolating switch transmission component is connected to the isolating switch main shaft.

10. A gas insulated circuit breaker cabinet according to claim 1, characterized in that: It also includes a grounding copper busbar mechanism. The cabinet also includes a pressure relief chamber and a cable chamber. The pressure relief chamber and the cable chamber are arranged below the gas box. The grounding copper busbar mechanism includes a grounding nut. The grounding copper busbar mechanism is distributed along the gas box, the pressure relief chamber and the cable chamber through the grounding nut.

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