CN107528250B

CN107528250B - Switch cabinet

Info

Publication number: CN107528250B
Application number: CN201710690065.7A
Authority: CN
Inventors: 袁茂银
Original assignee: Individual
Current assignee: Hunan Guoao Power Equipment Co ltd
Priority date: 2013-09-12
Filing date: 2013-11-18
Publication date: 2020-05-15
Anticipated expiration: 2033-11-18
Also published as: CN203631401U; CN104051975B; CN104466765B; CN203859433U; CN104466765A; CN104051975A; CN104051970A; CN104051970B; CN107919628B; CN203774640U; CN104037641B; CN104051199A; CN104037636A; CN104037636B; CN104465195A; CN203632033U; CN203632054U; CN104037640A; CN104037640B; CN104037641A

Abstract

The invention provides a switch cabinet which comprises a bus chamber, an instrument chamber, a mechanism chamber, a cable chamber, a switch chamber and a pressure relief channel, wherein the instrument chamber, the mechanism chamber and the cable chamber form a front cabinet of the switch cabinet; each functional room area in the front cabinet and the rear cabinet is distributed in a step shape; the circuit breaker assembly comprises a bracket, a circuit breaker, an operating member and a sealing member; the seal encloses the switchgear cabinet when the circuit breaker assembly is located within the switchgear cabinet; the bracket can move the breaker assembly out of the switch chamber and the mechanism chamber for inspection and maintenance. The switch cabinet has the advantages of a fixed cabinet, a middle-positioned handcart cabinet and an inflatable cabinet, and is safe, simple and convenient to install and maintain due to the modularized design of the whole unit and the bus.

Description

Switch cabinet

Technical Field

The invention relates to a power distribution cabinet, in particular to a switch cabinet, more particularly to a sealed high-voltage switch cabinet, and belongs to the technical field of electrical equipment.

Background

The high-voltage switch cabinet is an electrical product which is used for realizing the functions of on-off, control or protection and the like in power generation, power transmission, power distribution, electric energy conversion and consumption of an electric power system. The high-voltage switch manufacturing industry is an important component of the power transmission and transformation equipment manufacturing industry and plays a very important role in the whole power industry.

At present, high-voltage switch cabinets (circuit breaker switch cabinets) of 6-40.5 KV at home and abroad mainly comprise fixed switch cabinets (fixed cabinets), middle-mounted or movable switch cabinets (trolley cabinets), inflatable cabinets (inflatable cabinets) and solid insulation switch cabinets, and the high-voltage switch cabinets have advantages and disadvantages.

The fixed cabinet is a first-generation high-voltage switch cabinet product, and the cabinet body, namely internal parts, of the fixed cabinet are fixedly connected, so that the fixed cabinet has the advantages of simple structure, few elements, good heat dissipation, reliable connection of the conductive bus, higher stability, smaller cabinet body size and small occupied area; but the trouble takes place and needs the testing and maintenance, because of its fixed connection's mode leads to needing whole circuit to cut off the power supply, and dismantles the trouble, makes the maintenance time of stationary cabinet long and from leading to the power failure time long, has brought very big inconvenience for the transmission of electricity power consumption.

In order to improve the problems of the fixed cabinet, the handcart type switch cabinet adjusts the position of the circuit breaker in the cabinet body, the circuit breaker and a vehicle body are integrated into a movable handcart circuit breaker, and the circuit breaker can be partially drawn out of the cabinet body during maintenance, so that the circuit breaker is convenient to replace; however, due to the requirement of the clear distance between the electric conductors, the size of the handcart cabinet is larger than that of a fixed cabinet, and the number of auxiliary insulators is large. The breaker can be divided into a middle cabinet and a moving cabinet according to the position of the breaker in the cabinet body; the positioning and locking devices of the circuit breaker handcart in the switch cabinet are arranged at the bottom of the handcart and limited by the structure of the handcart, and the positioning and locking devices are generally suitable for low-current switch cabinets and cannot resist larger electrodynamic force moment. When the short-circuit current of the switch cabinet reaches 50kA or above, the generated electric power is very large and is generated at the connection part of the moving contact of the handcart and the fixed contact of the switch cabinet. Because the distance between the action point of the electric force and the bottom of the handcart is larger, a handcart positioning device relative to the bottom easily generates larger moment, so that the handcart is easy to loosen and shift, and the conducting actuator and the static contact are disconnected. The middle-mounted type trolley cabinet is unreliable in one-time plug sliding connection, so that the contact heating is caused, the heat dissipation performance of the structure is poor, and accidents such as insulation aging and explosion are often caused by overheating. Therefore, the existing handcart positioning and locking mode can hardly meet the requirements of high current and high breaking of the switch cabinet. In order to improve the stability of a handcart switch cabinet in the working process of a switching-on passage, the prior art has a great deal of improvements on handcart fixing modes and devices, for example, Chinese patent application CN 102983524 discloses a handcart of a switch cabinet circuit breaker, which comprises a handcart body, wherein the head of the handcart body is provided with a moving contact, and two sides of the handcart body are respectively provided with a positioning plate; the positioning plate is provided with a guide wheel matched with the rail groove of the handcart positioning device and an elastic lock rod matched with the test position lock hole and the working position lock hole of the handcart positioning device. The positioning device and the switch cabinet breaker handcart obtained by applying the positioning device can realize accurate guiding and left-right limiting of the handcart, can meet stable positioning of the handcart in different position states, can effectively reduce action torque generated by electromotive force, and further can overcome larger electromotive force; but still can not realize the same or similar stable performance as the fixed cabinet; in addition, the circuit breaker in the middle-placed cabinet generally adopts a VS1 or VD4 vacuum circuit breaker, whether the alignment of the moving contact and the static contact is correct or not cannot be monitored, the structure of the contact box is not favorable for heat dissipation of the contacts, an insulating assembly is easy to age, and insulation breakdown discharge accidents occur.

Both of the above-mentioned switch cabinets have two disadvantages: the occupied space is large, and the primary loop electrified main element is not completely sealed in the switch cabinet. The development of both types of switchgear cabinets is mainly based on these two features. In addition, both the fixed cabinet and the handcart cabinet are open, namely, switch equipment and connecting parts in the cabinet are directly exposed in the atmosphere, the shell has low protection level and poor applicability, is sensitive to the quality of ambient air, and is difficult to be suitable for the running conditions of the south China, coastal areas and places with severe condensation and dirt in underground places. Simultaneously because be equipped with louvre or radiator fan, the air circulates in the switch board, receives dust, moist air influence performance easily, causes equipment oxidation and surface insulation performance reduction more easily to shorten the life of equipment.

Because of the problem that the environment has great influence on the switch cabinet, a sealed type gas-filled cabinet, such as a C-GIS; the whole cabinet body of the switch cabinet is sealed, the pressure in the cabinet can be improved by filling SF6 into the cabinet to ensure the insulation performance, the size of the cabinet body can be reduced by reducing the insulation clearance, the protection grade IP is high, and the problem of environmental influence on equipment is solved; the air leakage phenomenon still occurs, when the air leakage occurs, the equipment cannot normally run and use due to insufficient insulation distance, the potential safety hazard is great, and accidents are easy to occur; in addition, because the structural elements of the cabinet body are integrated with the cabinet body, when equipment needs to be overhauled or replaced, the detection, the maintenance and the replacement of parts or individual components cannot be realized, so that the cabinet body can only be used as a disposable power distribution cabinet, and the maintenance cost is extremely high; the whole replacement also greatly increases the power failure range and time, and reduces the continuity of power supply; in addition, another defect of the gas-filled tank is that the SF6 filled in the tank is listed as greenhouse gas, which belongs to the aspect of emission reduction, and is contrary to the great promotion of energy conservation and emission reduction in China.

In recent years, solid-insulated switchgear has been newly proposed, which is insulated by a solid insulation method, unlike the above-described switchgear. The solid insulation is different from the solid-sealed pole in that not only each vacuum arc-extinguishing chamber is sealed, but the arc-extinguishing chambers and related components are integrally cast by epoxy resin, so that the safety insulation distance between the phases in the switch, namely the ground, is shortened to a millimeter level from 125mm of air insulation, and the size and the volume of the switch cabinet are greatly reduced; the switch cabinet is green and environment-friendly, is suitable for distribution network automation, and has strong environmental pollution resistance; however, because the solid insulation piece is formed by adopting a solid insulation mode, the solid insulation piece is easy to be affected with damp and aged, the insulation performance is reduced, the real-time monitoring and supervision cannot be realized, and the insulation breakdown discharge accident is easy to happen; the manufacturing process is complex, and the insulating material with high performance and good stability is a big difficulty of the solid insulating switch cabinet, and in addition, the switch cabinet has the defects of a fixed cabinet, and the detection and maintenance are extremely inconvenient when the switch cabinet breaks down; domestic enterprises are still in further research and development, and foreign imports are expensive and high in cost.

At present, the switch cabinets cannot meet the requirements of an electric power system on higher and higher power supply quality and reliability, and cannot meet the requirements of the electric power system on higher and higher economy and reliability of high-voltage switch equipment.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide a comprehensive switch cabinet which combines the advantages of various cabinets in the prior art and avoids the disadvantages thereof, so as to meet the increasingly high requirements of the power system on the economy and reliability of the high voltage switch equipment.

In order to achieve the purpose, the invention provides the switch cabinet which has the advantages of simple structure and stable operation of a fixed cabinet, the whole unit and the bus are in modular design, and the installation and maintenance are safe and simple; the switch cabinet is in a floor type assembled cabinet body structure and comprises a bus chamber, an instrument chamber (low-pressure chamber), a mechanism chamber, a cable chamber, a switch chamber and a pressure relief channel; the front cabinet A of the switch cabinet consists of an instrument room, a mechanism room and a cable room, and the instrument room, the mechanism room and the cable room are sequentially arranged in the front cabinet A from top to bottom; the bus chamber, the switch chamber and the pressure relief channel form a rear cabinet B of the switch cabinet, and the bus chamber, the switch chamber and the pressure relief channel are arranged in the rear cabinet B from top to bottom in sequence; an upper line-incoming insulator group, a circuit breaker assembly, a grounding switch and a lower line-outgoing insulator group are sequentially arranged in the switch chamber from top to bottom; the functional chambers in the front cabinet A and the rear cabinet B of the switch cabinet are preferably distributed in a stepped manner.

Preferably, the top surface of the bus chamber is flush with the top surface of the instrument chamber, the bottom surface of the bus chamber (the top surface of the switch chamber) is higher than the bottom surface of the instrument chamber, the top surface of the switch chamber is lower than the top surface of the instrument chamber but higher than the bottom surface of the instrument chamber (the top surface of the mechanism chamber), the bottom surface of the switch chamber (the top surface of the pressure relief channel) is lower than the bottom surface of the mechanism chamber (the top surface of the cable chamber), the top surface of the switch chamber (the bottom surface of the bus chamber) is higher than the top surface of the mechanism chamber, and the bottom surface of the pressure relief channel (the bottom surface of the rear cabinet B) is flush; the cabinet may be named herein as top, bottom, left, right, front and rear according to six-sided views, wherein the front of the cabinet is referred to in this application as the front view plane of the cabinet.

Preferably, the opposite surfaces of the front cabinet A and the rear cabinet B are jointed and movably connected to form the use state or the delivery state of the switch cabinet. For the sake of clarity and brief description of the further structure of the switch cabinet, the opposite surface of the front cabinet a and the rear cabinet B is called the back of the front cabinet a (the cabinet wall of the surface is simply called the back wall), and the opposite surface of the rear cabinet B and the front cabinet a is called the front of the rear cabinet B (the cabinet wall of the surface is simply called the front wall); the cabinet walls of the opposite surfaces of the front cabinet A and the rear cabinet B are attached and movably connected, and the movable connection is in threaded connection.

Preferably, the switch cabinet body is assembled by a frame-type cabinet body, a partition plate and a panel, or assembled by cabinet bodies in different functional areas.

More preferably, each function room area of cubical switchboard adopts the panel concatenation to form, and each panel concatenation department is fixed connection, and preferred embodiment can adopt the welding, or adopt the panel to fold again after welding.

Preferably, the switch cabinet is made of stainless steel or aluminum alloy, and is good in strength and not easy to deform.

More preferably, the front cabinet is formed by assembling and mounting a frame cabinet body, a partition plate and a panel or assembling and mounting cabinet bodies of all functional room areas after splicing the panels, and the back of the front cabinet is in an open state; and a bus chamber and a switch chamber in the rear cabinet are assembled and installed by adopting a closed or non-closed cabinet body. As another preferred mode, the rear cabinet can adopt a frame cabinet body, the partition plates and the panels are riveted, and the sealing performance and the stability of the cabinet body can be ensured by adding filling glue.

Preferably, the upper line-inlet insulator group, the circuit breaker assembly, the grounding switch and the lower line-outlet insulator group form two groups of isolating switch fractures; the upper static contact of each isolating switch is connected with one end of the upper wire-inlet insulator group, the lower static contact of each isolating switch is connected with the grounding switch, and the moving contacts of the two isolating switches are respectively and independently connected with the two ends of the breaker assembly; when the two moving contacts are respectively closed with the upper static contact and the lower static contact, the isolating switch is switched on, namely the isolating switch in the switch cabinet is in a closed state.

Preferably, the top of the instrument room is provided with a small bus room for arranging the small bus.

Preferably, the pressure relief channel is realized by a pressure relief valve arranged on the bottom surface or the top surface in the switch chamber; and the pressure relief channel is preferably made of stainless steel and made into a metal bracket.

Another object of the present invention is to provide a switch cabinet, which has a simple structure and good stability, wherein the upper incoming line insulator set in the switch cabinet penetrates through the top surface or the side wall of the switch chamber and is partially located in the bus chamber and the switch chamber; the lower outgoing insulator group penetrates through the side walls of the switch chamber and the cable chamber and is partially positioned in the switch chamber and the cable chamber respectively.

More preferably, the centre line of the lower outlet insulator group is parallel to the bottom surface of the cable compartment.

More preferably, the number of upper line insulators is the same as the number of lower line insulators, or the number of upper line insulators is twice as large as the number of lower line insulator groups.

More preferably, the three lower outlet insulators are arranged in a triangle, preferably an isosceles triangle or an equilateral triangle.

Preferably, the instrument room, the mechanism room and the cable room are provided with a door, and secondary elements for control and display, such as function buttons and a display screen, are arranged on the door of the instrument room.

Preferably, a reliable grounding element is further arranged in the switch chamber, the reliable grounding element is a grounding moving contact which is arranged on the side wall of the switch chamber and is provided with a grounding fixed contact and matched with the grounding fixed contact in position, and the grounding moving contact is arranged on the circuit breaker assembly.

Another object of the present invention is to provide a switch cabinet, so as to maintain the high protection level of the gas-filled cabinet and not be affected by the working environment, and the equipment in the cabinet can stably operate for a long time, an opening is provided between the switch chamber and the mechanism chamber of the switch cabinet, a first opening is provided on the plane of the mechanism chamber opposite to the rear cabinet B, a second opening is provided on the plane of the switch chamber opposite to the front cabinet a, the bottom end of the second opening is higher than the bottom end of the first opening, the top end of the second opening is not higher than the top end of the first opening, and a step is formed between the bottom end of the first opening and the bottom end of the second opening.

More preferably, the second opening is formed by a side wall and/or a front wall of the switching chamber.

More preferably, the second opening is formed by removing material from a front wall of the switching chamber.

More preferably, the second opening is formed by folding the panels around the top and bottom walls of the switch chamber from the side walls of the switch chamber.

More preferably, the second opening is formed by the side walls of the switch compartment being folded over the panels and surrounded by the material removed from the front wall of the switch compartment.

Preferably, the switch chamber communicates with the mechanism chamber through the first opening and the second opening; the circuit breaker assembly is disposed in the switch chamber and the mechanism chamber and extends through the first opening and the second opening.

Preferably, the area of the first opening is larger than the area of the second opening.

Preferably, the circuit breaker assembly comprises a bracket, a circuit breaker, an operating member and a sealing member, wherein the circuit breaker, the sealing member and the operating member are connected in sequence through the bracket.

Preferably, the circuit breaker assembly connects the circuit breaker, the sealing member and the operating member in sequence from left to right through the bracket.

Preferably, the circuit breaker is a three-phase vacuum circuit breaker pole; and two ends of the three-phase vacuum circuit breaker pole are respectively provided with a pair of moving contacts.

Preferably, when the switch cabinet is closed, the circuit breaker is located in the switch chamber, the operating element is located in the mechanism chamber, and the sealing element closes the second opening, and the switch chamber is in a sealed state.

More preferably, the sealing element comprises a sealing plate and a sealing drive shaft, wherein the sealing plate closes the second opening when a passage is made (closed) in the switchgear cabinet.

More preferably, the area of the sealing plate is not smaller than the area of the second opening and not larger than the area of the first opening.

More preferably, the area of the sealing plate is larger than the area of the second opening and smaller than the area of the first opening.

More preferably, the sealed driving shaft includes a flange, an operating driving shaft and a bellows.

More preferably, the actuating shaft extends through the bellows and the flange in that order.

More preferably, the flange is screwed to the sealing plate, and the flange and the bellows are provided on both sides of the sealing plate, respectively.

More preferably, the opposite surfaces of the flange and the sealing plate are respectively provided with an O-shaped gasket groove with a matched shape; preferably, the flange and the sealing plate are fixedly sealed through screwing after the O-shaped gasket is placed in the O-shaped gasket groove.

More preferably, the operation transmission shaft is divided into a rotating part and a fixed part, and a bearing, preferably an oilless bearing, is provided between the rotating part and the fixed part.

More preferably, the fixing portion of the operation transmission shaft passes through the bellows, the sealing plate, and the flange, and is connected to the operation member to transmit the operation of the operation member.

More preferably, the rotating part of the operating transmission shaft is connected with the rotating shaft for transmission through a transmission element, and the transmission element is used for controlling the opening and closing of the circuit breaker.

More preferably, the two ends of the corrugated pipe are respectively sealed with the connecting flange and the outer wall of the fixing part.

More preferably, part of the shaft body of the fixing part is a solid body.

More preferably, the bellows sealingly connects the outer wall of the solid body portion of the fixation section, preferably by welding.

It is worth mentioning that the corrugated pipe is compressible, two ends of the corrugated pipe are respectively connected with the flange and the outer wall of the fixing part in a sealing mode, when the operation transmission shaft is used for driving the breaker to be switched on and off, the operation transmission shaft moves left and right, and the corrugated pipe is welded between the flange and the operation transmission shaft in a sealing mode to form a sealing buffering area located on the left side of the sealing plate.

Preferably, in order to enable the sealing member to firmly seal the switch chamber, an annular metal fixing member is fixedly connected to the periphery of the second opening of the switch chamber, the annular metal fixing member is preferably an annular metal plate, and the fixed connection is preferably welded; for attaching a stationary seal, preferably for securing a seal plate; and furthermore for preventing deformation of the outer periphery of the second opening and for connecting with other components and securing the corresponding connection.

More preferably, the metal fixing piece is fixedly connected with the second opening in a manner that depends on the forming process of the second opening, and the metal fixing piece can be used for selectively welding two side walls, a front wall and/or a top wall and a bottom wall of the switch chamber. As a preferred welding method, the metal fixing piece is welded on the side wall of the switch chamber and/or the edge formed by bending the side wall.

More preferably, when the sealing member closes the switch chamber, the sealing plate and the annular metal plate are fixed in a screwed manner, and the opposite surfaces of the annular metal plate and the sealing plate are provided with O-shaped gasket grooves with matched shapes, and the O-shaped gasket grooves are used for fixing and then fixedly sealing in a screwed manner.

More preferably, the screw holes on the annular metal fixture do not extend through the annular metal fixture.

More preferably, the annular metal fixing part is provided with at least two positioning pins, and the sealing plate is provided with positioning holes matched with the positioning pins.

More preferably, the switch cabinet is further provided with a positioning element, and the positioning element comprises a pair of positioning holes and positioning bolts, wherein the positioning holes and the positioning bolts are matched with each other in position and are arranged on the breaker assembly, and the pair of positioning bolts is arranged on the cabinet wall on the side, close to the wall, of the switch chamber.

More preferably, the locating peg tip is conical.

More preferably, the operating part is internally provided with a control element for controlling the circuit breaker to rotate forwards and reversely at 90 degrees so as to realize the opening and closing of the disconnecting switch, and the control element is respectively connected with the operating part and the operating transmission shaft; the movement of the control element can be realized by the movement of a shifting fork which is coaxial with the rotating shaft, and the control element is arranged on the left side of the sealing plate.

More preferably, the control element is fixedly connected with the sealing plate and the bracket through a metal fixing plate and corresponding connectors, and the shifting fork is positioned between the metal fixing plate and the sealing plate; a control lever in the operating member operates the control member and is linked to the operating member through the sealing plate.

More preferably, a control rod of the control element in the operating part penetrates through the sealing plate to be linked with the operating part, an O-shaped gasket groove is formed in the position, penetrating through the sealing plate, of the control rod, and the O-shaped gasket is placed and then fixed through screwing to ensure sealing.

Another objective of the present invention is to provide a switch cabinet, so as to achieve convenient maintenance of the handcart cabinet and convenient maintenance and replacement of the circuit breaker, wherein the support of the circuit breaker comprises a moving frame and a rotating shaft, and the three-phase vacuum circuit breaker poles are arranged and fixed on the rotating shaft from left to right in parallel.

Preferably, the moving frame includes a bracket portion and a connecting portion.

More preferably, the connecting portion is a pair, and two ends of the connecting bracket portion which are independent from each other are arranged in parallel.

More preferably, the bracket part is a pair of horizontal arms arranged in parallel, and the horizontal arms are respectively positioned at two sides of the breaker assembly; the connecting part comprises an inverted U-shaped bent arm and two parallel vertical arms; the both ends of curved boom connect the homonymy of two horizontal arms respectively, and two stand arms are independent the opposite side of connecting two horizontal arms respectively.

More preferably, two standing arms are respectively screwed to both sides of the sealing member.

More preferably, one end of the rotating shaft is movably connected with the bent arm.

More preferably, one end of the rotating shaft is provided with a rotating pin, a rotating hole is formed in the movable connection position of the bent arm and the rotating shaft, the rotating pin is matched with the rotating hole in position, and the rotating pin can rotate in the rotating hole, so that the three-phase vacuum circuit breaker pole columns are fixed on the rotating shaft in parallel from left to right and can rotate positively and negatively at 90 degrees along with the rotating shaft.

Another objective of the present invention is to provide a switch cabinet, which has the flexibility of a handcart cabinet and a high protection level of a sealed switch cabinet at the same time, wherein a pair of guide rails is arranged in a switch chamber and positioned in the middle of a rear cabinet; a pair of guide rails is arranged in the mechanism chamber and is positioned in the middle of the front cabinet; the space between the guide rails in the switch chamber and the mechanism chamber is equal, and the space between the guide rails is equal to the space between the two horizontal arms of the bracket; the circuit breaker assembly also comprises a translation device (which can also be a stepped bracket of the circuit breaker assembly), wherein the translation device is used for realizing that the circuit breaker still keeps moving on the same horizontal plane when meeting step surfaces with different heights.

More preferably, the translation means are provided on the carriage, wherein: the translation device is arranged on the bracket and comprises at least two positioning arms which are respectively arranged on the horizontal arms of the bracket part; one end of each positioning arm is pivotally connected with the horizontal arm through a first guide rail positioning shaft and can rotate around the first guide rail positioning shaft, each positioning arm is provided with a positioning arm locking pin, each positioning arm is provided with a swing arm, the swing arm is pivotally connected with the horizontal arm through a second guide rail positioning shaft on the horizontal arm, each swing arm is provided with a sliding groove, and a pin sleeve of the positioning arm locking pin on each positioning arm is arranged in the sliding groove of the corresponding swing arm.

As another preferred mode, the translation device is arranged on the bracket and comprises at least two positioning arms which are respectively arranged on the horizontal arms of the bracket part; the locating arm comprises two metal arms, the locating arm is provided with a swing arm, the swing arm is located between the two metal arms, one end of the locating arm is in pivot connection with the horizontal arm through a first guide rail locating shaft and can rotate around the first guide rail locating shaft, the swing arm is in pivot connection with the horizontal arm through a second guide rail locating shaft on the horizontal arm, a sliding groove is formed in each swing arm, a locating arm locking pin penetrates through the sliding grooves of the two metal arms and the swing arm and respectively welds or rivets the two metal arms, and one end, close to a roller, of the sliding groove is respectively provided with a clamping groove.

More preferably, the other end of each positioning arm is connected with a roller, and the length (height) of each positioning arm is not less than the length (height) of a step formed by the second opening and the first opening of the switch cabinet; preferably equal, i.e. equal in height to the step.

More preferably, one end of the sliding groove close to the roller is respectively provided with a blocking groove.

More preferably, the number of the positioning arms and the number of the swing arms are 4, and two positioning arms and two swing arms are arranged on each horizontal arm.

More preferably, a spring is arranged at each of the first guide rail positioning shaft and the second guide rail positioning shaft.

It is worth mentioning that the translation device is configured to be used for moving the breaker assembly on the guide rail in the switch chamber through the translation device when the breaker assembly needs to be pulled out of the switch cabinet for detection, all the positioning arms and the swing arms are accommodated in the horizontal arms under the action of gravity of the breaker assembly and the fixed supporting force of the guide rail, and when the rollers on one group of positioning arms closest to the sealing plate leave the guide rail in the switch chamber, the rollers of the positioning arms lose the fixed supporting force of the guide rail; namely, under the action of gravity of the circuit breaker assembly, the positioning arm and the swing arm are put down along the vertical direction to leave the horizontal arm, the positioning arm is changed from the horizontal direction to the vertical direction, meanwhile, the length of the positioning arm can compensate the height difference of the stepped guide rail, the circuit breaker assembly can still move on the same horizontal plane through a roller of the positioning arm, namely, the circuit breaker assembly can continuously move on the guide rail of the mechanism chamber, otherwise, when the circuit breaker assembly needs to be pushed into the switch cabinet chamber, an operator needs to push the circuit breaker assembly to move through the bracket, at the moment, the positioning arm still has the vertical direction, when a group of swing arms closest to the steps of the switch chamber and the mechanism chamber in the translation device are contacted with the end faces of the stepped corners to generate extrusion force, under the action of the extrusion force, the swing arms rotate upwards, and simultaneously, the positioning arm locking pins on the positioning arms, finally, the positioning arm locking pin moves to the other end of the sliding groove, the positioning arm and the swinging arm of the group are accommodated in the horizontal arm, and the roller of the positioning arm rolls on the guide rail of the switch cabinet; at this point, the circuit breaker assembly is pushed forward, and when all the positioning arms and the swinging arms are accommodated in the horizontal arm, the roller in the horizontal arm can move on the guide rail of the switch cabinet completely.

Another objective of the present invention is to provide a switch cabinet, so as to achieve the small volume, less material consumption, small floor space, and the lower static contact is connected to the grounding switch through an L-shaped metal connector, wherein the metal connector includes a vertical portion and a horizontal portion, one side of the vertical portion is connected to the insulator of the grounding switch, and the other end is connected to the bus; the horizontal part is connected with the lower static contact.

Another object of the present invention is to provide a switchgear cabinet, which is reliable for wall installation and occupies a small area; except the second opening, the other switch chamber walls are closed.

Another objective of the present invention is to provide a switch cabinet, so as to realize that the isolation fracture of the switch cabinet is visible, and whether the alignment of the moving contact and the stationary contact is correct or not can be monitored, so as to ensure reliable contact or disconnection, and improve the safety of operation and maintenance; the switch cabinet is also provided with an isolating switch observation window, and the isolating switch observation window consists of an observation window A and an observation window B which are respectively arranged in the instrument room and the switch room.

Preferably, the viewing windows a and B are concentric and increase in area.

More preferably, the area of the observation window a is smaller than the observation window B.

More preferably, the observation window B passes through a plane opening in the switch room opposite to the instrument room, respectively, and a transparent sealing window is provided inside the opening of the switch room.

More preferably, the sealing window is made of transparent material with stable high pressure resistance, such as transparent glass or plastic.

The invention also aims to provide the switch cabinet, so that the switch cabinet can be seen as the grounding switch, and the safety of operation and maintenance is improved; the switch cabinet is also provided with a grounding switch observation window which consists of an observation window C and an observation window D, wherein the observation windows C and D are respectively arranged in the cable chamber and the switch chamber.

Preferably, the viewing windows C and D are concentric and increase in area.

More preferably, the area of the observation window C is smaller than the observation window D.

More preferably, the observation window D passes through a plane opening in the switch room opposite to the instrument room, respectively, and a transparent sealing window is provided inside the opening of the switch room.

Another objective of the present invention is to provide a switch cabinet, so as to achieve the excellent heat dissipation performance of the switch cabinet, wherein the switch chamber further includes a heat dissipation channel.

Preferably, the heat dissipation channel is formed by folding and bending the chamber walls of the switch chambers, and when the switch cabinets are put in a splicing manner, the inflection points of the folding positions between the two switch cabinets correspond to each other in pairs to form the heat dissipation channel.

More preferably, the cross-section of the heat dissipation channel may be hexagonal or rhombic.

Preferably, the inner wall of the switch chamber is fixedly connected with a plurality of hollow metal tubes, and the metal tubes penetrate through the top surface and the bottom surface of the switch chamber to form a plurality of heat dissipation channels communicated with the environment.

More particularly, the switch cabinet provided by the invention can be used as a non-completely sealed switch cabinet instead of an inflatable cabinet aiming at specific working environment and large working current, and can be realized by adding auxiliary heat dissipation elements of a switch room or other functional room areas, such as heat dissipation holes with moisture and dust resistance, and an automatic ventilation fan and the like arranged in a pressure relief channel to enhance the internal heat dissipation of the switch cabinet; but still can guarantee that the switch cabinet is in a working environment relatively isolated from the external environment at the moment.

Another object of the present invention is to provide a switch cabinet, which can flexibly select air insulation or other gas-filled insulation according to the requirement, and the switch chamber is further provided with an inflation valve.

Another object of the present invention is to provide an interlock assembly for any of the above switch cabinets, so as to achieve reliable and stable automatic "five-prevention" interlock function of the high voltage switch cabinet, with high safety factor, and when the circuit breaker assembly is moved out of the switch cabinet, the interlock assembly closes the second opening.

Preferably, the interlocking assembly comprises a linkage piece, a roller shutter, a locking piece and a transfer trolley, after the transfer trolley is locked with the switch cabinet through the locking piece, the linkage piece is started, and the second opening is closed through the roller shutter which moves with the linkage piece.

Preferably, a transfer trolley is used to assist in moving the circuit breaker assembly out of or into the switchgear.

More preferably, the deployment area of the roll screen is not smaller than the second opening area.

More preferably, the linkage piece comprises a first linkage piece arranged in the mechanism chamber, a second linkage piece arranged on the transfer trolley and a clutch piece; the first linkage piece and the second linkage piece transmit motion through the clutch piece; the transfer trolley and the switch cabinet are locked and fixed through the locking piece, the clutch piece transmits the motion of the first linkage piece to the second linkage piece, the second linkage piece is started through the motion of the breaker assembly, the second linkage piece is linked with the first linkage piece, and the roller shutter moves downwards along with the linkage of the first linkage piece to close the second opening.

More preferably, the first linkage comprises a first rotating shaft, a first chain group, a first gear, a first transmission rotating shaft, a first transmission gear a, a first transmission chain and a first transmission gear b which are sequentially connected and linked; the first transmission gear a is connected with the clutch piece; the roller shutter is arranged in the mechanism chamber through two coil springs at two ends of the first rotating shaft, so that the first rotating shaft moves to drive the roller shutter to move upwards or downwards; the linkage process of the first linkage piece is as follows: when the clutch piece is linked with the first transmission gear a, the first transmission gear a is transmitted to the first transmission gear b through the first transmission chain, the first transmission gear b is continuously transmitted to the first gears on two sides of the first transmission rotating shaft through the first transmission rotating shaft, then the first chain is transmitted through the first gear set, and then the first rotating shaft is transmitted through the first chain, so that the downward or upward movement of the roller shutter is realized.

More preferably, the first chains are in a pair, and each first chain is in a right triangle shape through three first gears, and the rolling curtain is overlapped with the right-angled side of the right triangle when being unfolded completely downwards.

More preferably, the first drive shaft is connected to a pair of first gears at the acute angle of the horizontal side of the right triangle.

More preferably, the second linkage member comprises a second transmission gear, a second transmission shaft, a second chain, a second rotating shaft, a second gear a and a second gear b which are connected in sequence for transmission, wherein two ends of the second rotating shaft are connected with the second gear a and the second gear b which are coaxially transmitted with the second rotating shaft.

More preferably, the circuit breaker assembly further comprises a rack arranged on the auxiliary bracket, and the second linkage member moves with the circuit breaker assembly when the rack is in meshing transmission with the second gear a.

More preferably, the linkage process of the second linkage member is: when the rack moves to a certain position of the transfer trolley along with the breaker assembly, the rack is meshed with the second gear a, the rack continues to move along with the breaker assembly to transmit the second gear a and the second gear b which is the same as the second gear a and a second rotating shaft, the second chain transmits the motion of the second gear b to the second transmission shaft, the second transmission shaft drives the second transmission gear, and the second transmission gear transmits the clutch piece.

More preferably, the movement distance of the rack bar driving the interlocking component is not less than the unfolding distance of the roller shutter.

More preferably, the moving distance of the second linkage member is not less than the unwinding distance of the roll screen.

More preferably, the second gear a is smaller in diameter than the second gear b.

More preferably, the clutch comprises a co-ordinated connection of the drive pin and a clutch element, which is connected to the first drive gear a.

More preferably, when the switch cabinet body is locked with the transfer car, the transmission pin is inserted into the clutch element to realize the engagement of the clutch piece, so that the transmission between the first linkage piece and the second linkage piece is realized, namely, the downward or upward movement of the roller shutter is realized.

More preferably, the locking member includes a locking lever, a locking pin and a locking hole; the locking holes are a pair and are respectively arranged on the cabinet body frame of the mechanism chamber; the locking pin is connected with one end of the locking rod, the locking pin and the locking rod are also a pair and are positioned on the transfer trolley, and the shape of the locking pin is matched with that of the locking hole.

More preferably, the pitch of the center lines of the two locking levers is equal to the pitch of the centers of the two locking holes.

More preferably, the other end of the locking lever is also provided with a cam handle which is pivotally connected to the locking lever.

More preferably, the transfer vehicle comprises a vehicle body and wheels for supporting the vehicle body to move; the two sides of the trolley body are respectively provided with a transfer trolley guide rail, the transfer trolley guide rails and the guide rails in the mechanism chamber are positioned in the same horizontal plane, and the distance between the two transfer trolley guide rails is equal to the distance between the two guide rails on the inner side of the mechanism chamber, namely the two transfer trolley guide rails are equal in height and equal in distance to the guide rails in the mechanism chamber; the length of the transfer car guide rail is not less than the length of the breaker assembly.

More preferably, a pair of locking rods respectively penetrate through baffles arranged below two ends of the guide rail of the transfer trolley, and the cam handle and the locking rods are respectively positioned on two sides of the baffles.

More preferably, the locking lever houses a spring disposed between the flapper and another flapper secured to the locking lever.

More preferably, the circuit breaker assembly and the transfer shop are further provided with a pair of matching fixing holes and fixing pins for further stabilizing the circuit breaker assembly.

More preferably, the fixing hole is provided on the transfer vehicle, and the fixing pin is provided on the operating member of the circuit breaker assembly.

Preferably, the switchgear cabinet further comprises a locking aid for blocking the movement of the interlocking module.

More preferably, the locking auxiliary element is arranged on the inner wall of the cable chamber with the height consistent with that of the locking hole of the locking piece and comprises an auxiliary locking pin and an auxiliary locking pin control rod, one end of the auxiliary locking pin control rod is movably connected with the inner wall of the cable chamber, and the locking auxiliary element is always close to the inner wall of the cable chamber through a spring arranged at the movable connection position; the other end of the auxiliary locking pin control rod is fixedly connected with an auxiliary locking pin.

More preferably, the auxiliary locking pin is inserted into the first chain of the first link to suspend movement of the first chain to effect suspension of movement of the link assembly.

More preferably, when the locking pin of the locking piece is inserted into the locking hole, the locking pin simultaneously jacks up the auxiliary locking pin control rod, the auxiliary locking pin leaves the first chain, and then the interlocking assembly can perform interlocking safety protection along with the movement of the circuit breaker assembly; and when the roller shutter is completely put down and the breaker assembly leaves the switch cabinet body, the auxiliary locking pin control rod drives the auxiliary locking pin to stop the movement of the first chain again by pulling out the locking pin.

Compared with the prior art, the switch cabinet provided by the invention has the advantages of high strength, attractive appearance, compact structure, energy conservation, small occupied area, good interchangeability, strong oxidation resistance, good heat dissipation, large current transmission, high voltage transmission, good sealing performance, simple and convenient disassembly and easy operation, and also has the following advantages:

1. the cabinet body structure is miniaturized, the size of the whole sealed switch chamber is only 1000 long × 650 wide × 1300 high, the sealed switch chamber can be installed by a reliable wall, the occupied area for operation is small, and a certain occupied area is saved so as to improve the utilization rate of land;

2. the assembled cabinet body structure provides convenience conditions and flexible adaptability in prefabrication, storage and transportation and manufacture for manufacturers, and provides products with higher precision for users;

3. the isolation fracture and the grounding switch are visible, and the alignment of the movable contact and the fixed contact can be monitored, so that the contact or disconnection is reliable, and the safety of operation and maintenance is improved;

4. the protection grade is high, the using environment is wide, the failure rate, pollution, oxidation and the like caused by environmental factors are reduced, the service life of the equipment is prolonged, the switch cabinet can be used as switch equipment used in high altitude areas, the sealing performance is good, no air leakage exists, and the protection grade of the switch cabinet reaches IP67 by detection;

5. the removable detachable circuit breaker assembly has small volume, light weight, complete five-prevention interlocking function, high safety factor and convenient maintenance;

6. the connection in the cabinet is convenient to install, the cables are reasonable in arrangement, and particularly, the lower outlet cables are connected from the front cabinet, so that the detection and maintenance are convenient;

7. the adoption of the middle-mounted guide rail relatively reduces the phenomena of poor contact of moving and static contacts, overhigh temperature rise and the like caused by the deviation of the installation foundation of the switch cabinet;

8. the circuit breaker body and the cabinet body are provided with a moving contact and a static contact which are reliably grounded, and the circuit breaker assembly can be reliably grounded no matter at a working position or an isolation position;

9. elements in the cabinet body are simplified, the structure of a movable contact box and a fixed contact box is cancelled, and the heat dissipation of the contacts is facilitated; the high-speed grounding switch is suitable for transmitting large current, and meets the requirements of GB 3906-2006.

In summary, the switch cabinet provided by the invention, especially as a high-voltage switch cabinet, can meet the high requirements of the power system on the economy and reliability of the high-voltage switch equipment, and greatly improves the continuity of power supply operation.

Drawings

FIG. 1 is a cross-sectional view of a switchgear provided by the present invention;

figure 2 is a cross-sectional view of a circuit breaker assembly in a switchgear provided in accordance with the present invention;

FIG. 3 is a partially enlarged view of the sealing plate and the annular metal plate in the switch cabinet according to the present invention (A-A) when they are connected;

FIG. 4 is a perspective view of a sealed drive shaft in a switchgear provided in accordance with the present invention;

figure 5 is a front view of the circuit breaker assembly in a switchgear cabinet provided in accordance with the present invention with the switchgear cabinet sealed in the switchgear cabinet;

FIG. 6 is a front perspective view of a switchgear provided by the present invention;

FIG. 7 is a front view of a switchgear provided by the present invention;

fig. 8 is a schematic structural diagram of a grounding switch in the switch cabinet provided by the present invention;

fig. 9 is a schematic view of the operation principle and the structure of the translation device in the switch cabinet according to the present invention;

fig. 10 is a schematic view of the operation principle and the structure of the translation device in the switch cabinet according to the present invention;

FIG. 11 is a partial enlarged view of the translation device (B-B) in the switchgear provided in the present invention;

FIG. 12 is a schematic view of a heat dissipation channel of a switch cabinet according to a preferred embodiment of the present invention;

FIG. 13 is a schematic view of a heat dissipation channel of a switch cabinet according to a preferred embodiment of the present invention;

FIG. 14 is an enlarged view of a portion of the linkage (C-C) of the "five-prevention" interlock assembly of the switchgear provided in accordance with the present invention;

FIG. 15 is an enlarged partial view of the second linkage and clutch (D-D) of the "five-prevention" interlock assembly of the switchgear provided in accordance with the present invention;

FIG. 16 is an enlarged view of a portion of the locking member (E-E) of the "fail safe" interlock assembly of the switchgear provided in accordance with the present invention;

FIG. 17 is a flowchart of the operation steps of the "five prevention" interlock assembly of the switchgear provided in the present invention;

fig. 18 is a schematic structural diagram of a locking auxiliary element in a five-prevention interlocking assembly of a switch cabinet provided by the invention.

Detailed Description

The present invention will be described more fully with reference to the following detailed description and accompanying drawings.

The invention provides a switch cabinet, which is an indoor switch cabinet, wherein FIG. 1 is a cross-sectional view of the switch cabinet, as shown in FIG. 1, the switch cabinet is in a floor type assembled cabinet body structure and comprises a bus chamber 0, an instrument chamber 1 (low-pressure chamber), a mechanism chamber 2, a cable chamber 3, a switch chamber 4 and a pressure relief channel 5, specifically, the instrument chamber 1, the mechanism chamber 2 and the cable chamber 3 form a front cabinet A of the switch cabinet, and the bus chamber 0, the switch chamber 4 and the pressure relief channel 5 form a rear cabinet B of the switch cabinet; the bottoms of the front cabinet A and the rear cabinet B are flush and placed on the ground or other planes, and the opposite surfaces of the front cabinet A and the rear cabinet B are jointed and movably connected to form the use state or delivery state of the switch cabinet; for clarity and brief description of the further structure of the switch cabinet, the opposite surface of the front cabinet a and the rear cabinet B is referred to as the back of the front cabinet a (the cabinet wall of the surface is simply referred to as the back wall), and the opposite surface of the rear cabinet B and the front cabinet a is referred to as the front of the rear cabinet B (the cabinet wall of the surface is simply referred to as the front wall). The movable connection is preferably in a threaded connection and is fixedly connected with the screw hole in a matched mode through a bolt. In the front cabinet A, an instrument room 1, a mechanism room 2 and a cable room 3 are arranged from top to bottom in sequence, and in the rear cabinet B, a bus room 0, a switch room 4 and a pressure relief channel 5 are arranged from top to bottom in sequence. The switch cabinet body can be assembled and installed by using a cabinet body frame, a partition plate and a panel, or assembled and installed by using customized cabinet bodies in different functional room areas. Each functional room area of the switch cabinet is formed by splicing panels; preferably by welding of the panels. The steel plate can be made of stainless steel or aluminum alloy, and has good strength and difficult deformation; as a better implementation mode, the front cabinet a is formed by assembling and mounting a frame cabinet body, a partition plate and a panel or assembling and mounting cabinet bodies of all functional room areas through panel splicing, and the back of the front cabinet a is in an open state; and the bus chamber 0 and the switch chamber 4 in the rear cabinet B are assembled and installed by adopting closed or non-closed cabinets. An upper line-inlet insulator group 6, a circuit breaker assembly 7, a grounding switch 8 and a lower line-outlet insulator group 9 are arranged in the switch chamber 4 from top to bottom in sequence. An upper static contact 10 (or a moving contact) of the isolating switch is respectively and independently connected with one end of the upper wiring insulator group 6, a lower static contact 11 (or a moving contact) is respectively and independently connected with a grounding switch group 8, and a moving contact 12 (or a static contact) of the isolating switch is respectively and independently connected with two ends of the breaker component 7; the specific distribution of the moving and static contacts of the isolating switch is not fixed and can be selected according to actual requirements. The branch buses are respectively connected with the lower outgoing insulator and the grounding switch (the connection is omitted in the figure). When the moving contacts at two ends of one pole are respectively closed with the upper fixed contact and the lower fixed contact, the isolating switch is switched on, namely the isolating switch in the switch cabinet is in a closed state (when the breaker is switched on, a circuit in the cabinet is in a closed state). Further, a small bus bar room 13 for arranging the small bus bars may be further provided on the top of the instrument room 1.

Different from the prior art, the functional compartments in the front cabinet a and the rear cabinet B of the switch cabinet are distributed in a stepped manner, in other words, as shown in fig. 1, the top surface of the bus bar compartment 0 is flush with the top surface of the instrument compartment 1, the bottom surface of the bus bar compartment 0 (the top surface of the switch compartment 4) is higher than the bottom surface of the instrument compartment 1, the top surface of the switch compartment 4 is lower than the top surface of the instrument compartment 1 but higher than the bottom surface of the instrument compartment 1 (the top surface of the mechanism compartment 2), the bottom surface of the switch compartment 4 (the top surface of the pressure relief channel 5) is lower than the bottom surface of the mechanism compartment 2 (the top surface of the cable compartment 3), and the bottom surface of the pressure relief channel 5 (the bottom surface of the rear cabinet B) is flush with. In order to reduce the cost of the switch cabinet and simplify the structure, the pressure relief channel 5 is a pressure relief valve which is made of stainless steel and is provided with a metal bracket and is matched with the inner bottom surface or the top surface of the switch chamber 4.

It is worth mentioning that the environmentally isolated operation of the switchgear is achieved in particular by the circuit breaker assembly 7 which seals the switching chamber 4. An opening 14 is arranged between the switch chamber 4 and the mechanism chamber 2, namely, a first opening (not marked in the figure) is arranged on the plane of the mechanism chamber 2 opposite to the rear cabinet B, a second opening (not marked in the figure) is arranged on the plane of the switch chamber 4 opposite to the front cabinet A, the bottom end of the second opening is higher than the bottom end of the first opening, the top end of the second opening is not lower than the top end of the first opening, namely, the area of the first opening is larger than that of the second opening; in other words, the bottom end of the first opening and the bottom end of the second opening form one step 15, i.e., the opening and closing chamber 4 communicates with the mechanism chamber 2 through the first opening and the second opening. The breaker assembly 7 is built in the switch chamber 4 and the mechanism chamber 2, and penetrates the first opening and the second opening. As a preferred embodiment, in order to realize less production processes, namely, reduce welding processes, the switch cabinet can be formed by splicing panels or splicing the folded panels (the folded panels form at most 4 faces) with the panels. The above-mentioned switch cabinet is taken as an example to explain a manufacturing process for forming a preferred embodiment of the second opening. The second opening is formed by a side wall and/or a front wall of the switching chamber 4. One way of forming the second opening is that the opposite side walls of the switching chamber 4 are folded to form the second opening with the top and bottom walls of the switching chamber 4 being surrounded by the panels, i.e., the left side wall of the switching chamber 4 is folded to the right, and the right side wall of the switching chamber 4 is folded to the left while being surrounded by the top and bottom walls of the switching chamber 4, thus forming the second opening. Another way of forming the second opening is to remove material from the front wall of the switch chamber 4, and the area of the removed material is the size of the second opening. The second opening may also be formed by a combination of the two ways described above. In order to prevent the outer periphery of the second opening from deforming and connecting with other parts and stabilizing the connection, a metal fixing piece is welded on the outer periphery of the second opening, and the metal fixing piece is a metal annular plate. The welding mode of the metal fixing piece and the second opening depends on the forming process of the second opening, and the metal fixing piece can selectively weld two side walls, a front wall and/or a top wall and a bottom wall of the switch chamber 4. As a preferred welding method, the metal fixing piece is welded on the side wall and/or the edge bent from the side wall of the switch chamber 4.

Unlike the prior art circuit breaker assembly, the circuit breaker assembly 7 of the present invention includes a sealing member 704 in addition to the bracket 701, the circuit breaker 702, and the operation member 703; fig. 2 is a schematic structural view (cross-sectional view) of the breaker assembly 7, and as shown in fig. 1 and 2, the breaker assembly is connected to the breaker 702, the sealing member 704, and the operation member 703 in this order from left to right in the Y direction through a bracket 701. The circuit breaker 702 is preferably a three-phase vacuum circuit breaker pole with one or two pairs of moving contacts 12 at each end.

The support 701 includes a movable rack 7011 and a rotating shaft 7012, the movable rack 7011 includes a support portion 70111 and a connecting portion 70112, the connecting portions 70112 are a pair, and the two ends of the support portion 70111 are arranged in parallel and are respectively and independently connected. The rack 70111 is a pair of parallel horizontal arms 701111, and the horizontal arms 701111 are located on two sides of the circuit breaker assembly 7. The connecting portion 70112 includes an inverted U-shaped bent arm 701121 and two parallel upright arms 701122; two ends of the bent arm 701121 are respectively connected with the same side of the two horizontal arms 701111, and the two vertical arms 701122 are respectively and independently connected with the other side of the two horizontal arms 701111; two upright arms 7701122 are threaded on either side of seal 704. One end of the rotating shaft 7012 is movably connected with the bent arm 701121; a preferred embodiment of the movable connection is realized by a rotating pin and a rotating hole (not shown in the drawings) which are matched with each other, one end of the rotating shaft 7012 is provided with the rotating pin, the movable connection part of the bent arm 701121 and the rotating shaft 7012 is provided with the rotating hole, the rotating pin is matched with the rotating hole in position, and the rotating pin can rotate in the rotating hole, so that the three-phase vacuum circuit breaker poles are arranged and fixed on the rotating shaft 7012 in parallel from left to right and can rotate clockwise and anticlockwise by 90 degrees along with the rotating shaft 7012.

The sealing member 704 includes a sealing plate 7041 and a sealing transmission shaft 7042, wherein when the switch cabinet is opened (closed), the circuit breaker 702 is located in the switch chamber 4, the operating member 703 is located in the mechanism chamber 2, and the sealing member 704 (the sealing plate 7041) closes the second opening, and the switch chamber 4 is in a sealed state. In one preferable mode, the area of the sealing plate 7041 is larger than the area of the second opening and smaller than the area of the first opening. In order to make the sealing member 704 firmly seal the switch chamber 4, a metal fixing plate is welded on the periphery of the second opening of the switch chamber, and the metal fixing plate is the annular metal plate 401; fig. 3 is a partially enlarged view of a-a when the sealing plate and the annular metal plate are connected, and as shown in fig. 3, when the sealing member 704 closes the switching chamber 4, the sealing plate 7041 and the annular metal plate 401 are fixed by screwing, and the opposite surfaces of the annular metal plate 401 and the sealing plate 7041 are provided with O-ring grooves 16 having matching shapes for fixing the O-rings and then fixedly sealing by screwing.

It is worth mentioning that, in order to further ensure the sealing effect, the inventor further improves the structure of the sealing member 704, particularly the sealing transmission shaft 7042, fig. 4 is a perspective view of the sealing transmission shaft 7042, and as shown in fig. 4, the sealing transmission shaft 7042 includes a flange 70421, an operating transmission shaft 70422 and a bellows 70423. The flange 70421 is screwed to the sealing plate 7041, and preferably, a shape-matching O-ring groove is sequentially formed on the opposite surface of the flange 70421 to the sealing plate 7041, and then an O-ring is placed and then fixed and sealed by screwing (the gasket groove is the same as the gasket groove in the prior art, and is not shown in the figure). The operating transmission shaft 70422 is divided into a rotating portion 704221 and a fixed portion 704222, wherein a bearing 704223, preferably an oilless bearing, is provided between the rotating portion 704221 and the fixed portion 704222 in order to ensure rotation and transmission of the operating transmission shaft 70422. One end (fixing portion 704222) of the operation transmission shaft 70422 is connected to the operation member 703 through the bellows 70423, the sealing plate 7041, and the flange 70421 to transmit the operation of the operation member 703; the other end of the operating transmission shaft 70422 is connected with the rotating shaft 7012 through a transmission element 7031 for transmission, and the transmission element 7031 (preferably a crank arm, such as a seven-letter crank arm) enables the switching-on and switching-off of the circuit breaker 702 through transmission action, namely the switching-on and switching-off of an arc extinguishing chamber (vacuum bulb or vacuum tube) of a pole of the three-phase vacuum circuit breaker. The retainer 704222 has a solid central shaft, and the bellows 70423 is a non-rigid bellows 70423, i.e., a compressible bellows 70423 having two ends sealingly connected (welded) to the outer walls of the flange 70421 and the retainer 704222, preferably welded to the solid outer wall of the retainer 704222. Therefore, when the operation transmission shaft 70422 transmits the opening and closing actions of the circuit breaker, the operation transmission shaft 70422 moves left and right (the operation part realizes the left and right movement of the operation transmission shaft 70422, which is the prior art and is not described herein), the corrugated pipe 70423 forms a sealing buffer area positioned on the left side of the sealing plate 7041 due to the sealing welding between the flange 70421 and the operation transmission shaft 70422, the left side (in the switch chamber 4) of the sealing buffer area can still maintain a sealing state, especially, the sealing can be ensured to be maintained under the action of the maximum air pressure, and the compressibility of the corrugated pipe 70423 does not influence the left and right movement of the operation transmission shaft 70422 to realize the opening and closing actions of the circuit breaker; in other words, the flange 70421 and the bellows 70423 are used in cooperation, so that the switch chamber is sealed and kept in a sealed state by the sealing member 704, and the opening and closing of the breaker 702 and the opening and closing of the disconnector are not affected.

Fig. 5 is a front view of the switchgear cabinet when the sealing member 704 seals the switching chamber 4 (the operation member 703 on the right side of the sealing member 704 and the chamber door 21 of the mechanism chamber 2 are omitted in the drawing for better expressing the sealing state), and as shown in fig. 5, in order to better make the sealing member 704 fit and seal with the switching chamber 4, the second opening of the switching chamber 4 is provided with at least two positioning pins 17 in an extension way, and the sealing plate 7041 is provided with matching positioning holes 18, which are preferably arranged on an annular metal plate; a set of positioning elements 19, specifically a pair of positioning holes 1901 respectively formed on the cabinet wall on the side of the switch chamber close to the wall, and positioning bolts 20 respectively formed on the circuit breaker assembly 7 and having matching hole diameter, shape and position are further provided.

For a more reasonable distribution structure, the inventor further improves the structure of the circuit breaker assembly 7, namely, a control element 7032 which controls the circuit breaker 702 to rotate forwards and backwards by 90 degrees in the operating part 703 so as to realize the opening and closing of the disconnecting switch, and the control element 7032 is respectively connected with the operating part 703 and an operating transmission shaft 70422, and the movement of the control element 7032 can be realized by the movement of a shifting fork 70311 which is coaxial with the rotating shaft 7012. The shifting fork 70311 can move in a general manner in the prior art, for example, the shifting fork 70311 is rotated by a transmission device that moves back and forth on the lead screw, which is not described herein. However, the control element 7032 is different from the prior art in that the control element 7032 is disposed at the left side of the sealing plate 7041, rather than in the operating member 703, as shown in fig. 2, the control element 7032 is fixedly connected to the sealing plate 7041 and the bracket 701 via a metal fixing plate 70312 and corresponding connecting members, and the shift fork 70311 is located between the metal fixing plate 70312 and the sealing plate 7041; however, the control rod 7033 of the actuator 703 for operating the control element 7032 is coupled to the actuator 703 through the sealing plate 7041, and in order to ensure the sealing effect of the sealing member 704, the control rod 7303 is similarly provided with an O-ring through the sealing plate 7041 and secured by screwing, and may be implemented by a small flange and a corresponding O-ring groove. In addition, the principle that the control element 7032 is connected to the operation transmission shaft 70422 and the operation element 703 respectively and does not affect the opening and closing of the disconnecting switch is the same as the prior art, and details are not described herein.

In order to make the switch cabinet compact in structure and small in volume, fig. 6 is a front perspective view of the switch cabinet, as shown in fig. 1 and 6, when the center lines of an upper fixed contact 10, a pair of movable contacts 12 and a lower fixed contact 11 form a straight line perpendicular to the ground, the isolating switch in the switch cabinet is in a closing path state; the upper incoming line insulator group 6 penetrates through the top surface or the side wall of the switch room 4 and is arranged in the bus room 0; the lower outgoing insulator group 9 penetrates through the side walls of the switch chamber 4 and the cable chamber 3, namely, the lower outgoing insulator group 9 is partially positioned in the switch chamber 4, the other part is positioned in the cable chamber 3, and the central line of the lower outgoing insulator group 9 is preferably parallel to the switch cabinet (the bottom surface of the cable chamber 3); the number of the incoming line insulator groups 6 and the number of the outgoing line insulator groups 9 can be set according to actual requirements. As a preferred embodiment, the number of upper set of line insulators 6 may be the same as the number of lower set of line insulators 9, or the number of upper set of line insulators 6 may be twice the number of lower set of line insulators 9; for example, the number of the upper line-up insulator groups 6 in the switch room 4 can be six, that is, the number of the lower line-up insulator groups 9 can be three, so that the bus can be installed by one-to-one or one-to-two to meet the requirements of transmitting different bus current magnitudes. In order to ensure that the space clear distance between the buses meets the specification (no less than 125mm in the air medium), the three lower outgoing insulators 9 are arranged in a triangle, preferably an isosceles triangle or an equilateral triangle. Fig. 7 is a front view of the switch cabinet, as shown in fig. 7, wherein the instrument room 1, the mechanism room 2 and the cable room 3 are provided with a door 21, and the door 21 of the instrument room 1 is provided with secondary elements for control and display, such as a function button 101 and a display screen 102.

More particularly, in order to realize real-time observation of the operating state of the isolating switch, especially the isolating fracture between the moving contact 12 and the static contacts (10, 11), the switch cabinet is further provided with an isolating switch observation window 22, as shown in fig. 6 and 6, the isolating switch observation window 22 is composed of two observation windows a 2201 and B2202, which are respectively arranged in the instrument room 1 and the switch room 4, the observation windows a 2201 and B2202 are preferably concentric and have increasing areas, or the area of the observation window a 2201 is smaller than that of the observation window B2202; in addition, in order to maintain the sealed state of the switch cabinet, the observation window B2202 passes through the plane opening 2203 respectively facing the switch chamber 4 and the instrument chamber 1, and the transparent sealing window 23 is provided inside the opening of the switch chamber 4, and the sealing window 23 is made of a transparent material having stable high pressure resistance, such as transparent glass or plastic. Similarly, in order to realize real-time monitoring of the earthing switch, the switch cabinet is further provided with an earthing switch observation window 24, the earthing switch observation window 24 can refer to the isolating switch observation window 22 in structure, but different from the isolating switch observation window 22, the earthing switch observation window 24 is respectively arranged in the cable chamber 3 and the switch chamber 4, and other structures and position relations can be adjusted according to the specific position of the earthing switch 8 and referring to the structural position of the isolating switch observation window 22.

In order to further ensure the safety of the switch cabinet, the inventor further improves the structure of the switch chamber 4, and adds a reliable grounding element 25, specifically, a grounding fixed contact 2501 and a grounding moving contact 2502 matched with the grounding fixed contact are respectively arranged on the side wall of the switch chamber 4, and the grounding moving contact 2502 can be arranged on the circuit breaker assembly 7; wherein the static contact and the movable contact can be interchanged in position, and the static contact is installed on the circuit breaker assembly 7, so that the circuit breaker assembly is more convenient to overhaul and replace.

In addition, in order to further reduce the size of the switch cabinet, the inventor simplifies the grounding switch 8, fig. 8 is a schematic structural diagram of the grounding switch 8, and as shown in fig. 8, the grounding switch 8 can connect the lower stationary contact 11 with the grounding switch 8 through an L-shaped metal connector 801 on the premise of keeping the original functions, so that a group of post insulators and wires are reduced in the connection between the grounding switch 8 and the lower stationary contact 11, and the size of the switch chamber 4 are reduced. One side of the vertical portion 8011 of the metal connector 801 is connected to the insulator of the earthing switch 8, and the other end is connected to the bus bar; horizontal portion 8012 is connected to lower stationary contact 11.

It should be noted that the circuit breaker assembly in the switch cabinet of the present invention can also realize the handcart type moving function, and can be realized by additionally arranging the roller 27 and the guide rails (402, 201) arranged on the two side walls of the switch chamber 4 and the mechanism chamber 2 on the horizontal arm 701111 of the bracket portion 70111 in the bracket 701; in a preferred embodiment, the guide rails 402 of the switchgear cabinet 4 are located in the middle of the switchgear cabinet. However, due to the stepped cabinet arrangement and the sealing function of the circuit breaker assembly 7, a step 15 exists between the switch chamber 4 and the mechanism chamber 2, so that the circuit breaker assembly 7 overcomes the stepped movement when moving out of the switch cabinet. Therefore, in order to match the smooth push-in and pull-out of the breaker assembly 7 on the rails of different steps, the inventor studied and developed a translation device 26 for the breaker assembly 7, wherein the translation device 26 can realize that the breaker assembly 7, especially the breaker 702 portion, can still maintain the same horizontal plane movement when meeting the step surfaces of different heights. In order not to complicate the structure of the switchgear, the inventors have integrated the structure of the cradle 701 and the translation device 26 of the circuit breaker assembly. The translation device 26 is provided on the support 701, wherein: the distance between the pair of horizontal arms 701111 of the bracket 701 is equal to the distance between the rails 402 on the two side walls of the switch chamber 4 (the rails 201 on the two side walls of the mechanism chamber 2), that is, the rollers 27 provided on the horizontal arm 701111 can move along the rails (402, 201) respectively. Fig. 9 and 10 are schematic views of the operation principle and the structure of the translation device 26. The translating device 26 includes at least two positioning arms 2061 respectively disposed on the horizontal arms 701111 (as a preferred embodiment, 4 positioning arms 2601 are disposed on each horizontal arm 701111, two positioning arms 2601 are disposed on each horizontal arm 701111), one end of each positioning arm 2601 is pivotally connected to the horizontal arm 701111 via a first guide positioning shaft 2602 and can rotate around the first guide positioning shaft 2602, a positioning arm locking pin 2603 is disposed on each positioning arm 2601, each positioning arm 2601 is provided with a swinging arm 2604, the swinging arm 2604 is pivotally connected to the horizontal arm 701111 via a second guide positioning shaft 2605 on the horizontal arm 701111, each swinging arm 2604 is provided with a sliding slot 2606, the positioning arm locking pin 2603 on each positioning arm 2601 is sleeved in the corresponding sliding slot 2606 of the swinging arm 2604, one end of each positioning arm 2601 is connected to a roller 27, the length (height) of each positioning arm 2601 is equal to the length (height) of the step formed by the second opening and the first opening, i.e. at the same level as the step 15. When the circuit breaker assembly 7 needs to be pulled out of the switchgear for detection, the circuit breaker assembly 7 is first moved on the guide rails 402 in the switchgear cabinet 4 via the translation device 26, and all the positioning arms 260 and the swing arms 2604 are received in the horizontal arms 701111 under the action of the gravity force of the circuit breaker assembly 7 and the guide rail fixing support force. When the rollers 27 on the set of positioning arms 2601 closest to the sealing plate 7041 leave the guide rail 402 of the switching chamber 4, the rollers 27 of the positioning arms 2601 lose the fixing support force of the guide rail 402; that is, under the gravity of the circuit breaker assembly 7, the positioning arm 2601 and the swing arm 2604 will be lowered in the vertical direction away from the horizontal arm 701111, the positioning arm 2601 will be changed from the horizontal direction to the vertical direction, and the length of the positioning arm 2601 will compensate the above-mentioned stepped height difference of the guide rail, so that the circuit breaker assembly 7 will still move in the same horizontal plane, that is, will continue to move on the guide rail 201 of the mechanism chamber 2, through the roller 27 of the positioning arm 2601. Conversely, when the circuit breaker assembly 7 needs to be pushed into the switch cabinet, the operator needs to push the circuit breaker assembly 7 to move through the bracket 701, at this time, the positioning arm 260 still has a vertical direction, when a group of the swing arms 2604 closest to the step 15 of the switch cabinet 4 and the mechanism chamber 2 in the translation device 26 will contact with the end surface of the step corner to generate a pressing force, under the action of the pressing force, the swing arm 2604 rotates upward, and at the same time, the positioning arm locking pin 2603 on the positioning arm 2601 slides in the sliding slot 2606, so as to drive the positioning arm 2601 to rotate upward, and finally, the positioning arm locking pin 2603 moves to the other end of the sliding slot 2606, at this time, the group of the positioning arm 2601 and the swing arm 2604 are both accommodated in the horizontal arm 701111, and the roller 27 of the positioning arm 2601 will roll on the guide 402 of the switch cabinet 4; continuing to push the circuit breaker assembly 7 forward at this point, the roller 27 in the horizontal arm 701111 can move completely over the switchgear rail 402 when all of the positioning arms 2601 and swing arms 2604 are received in the horizontal arm 701111.

As a better embodiment, fig. 11 is a partial enlarged view of a B-B of the translation device 26 in the switch cabinet provided by the present invention, as shown in fig. 11, in order to simplify the structure of the circuit breaker translation device 26, the positioning arm 2601 is composed of two metal arms, the swing arm 2604 is located between the two metal arms, and the positioning arm locking pin 2603 penetrates through the two metal arms and the sliding slot 2606 of the swing arm 2604 and is welded or riveted to the two metal arms respectively; in order to better fix the support of the translation device and fix the moving direction, i.e. the positioning arm 2601 can only move downward 90 degrees from the horizontal arm 701111 to move back into the horizontal arm 701111 in the vertical or reverse direction, the ends of the sliding slot 2606 near the first rail positioning shaft 2602 are respectively provided with a detent slot 2607, and the first and second rail positioning shafts (2602, 2603) are respectively provided with a spring (not shown) to realize that the translation device 26 can automatically eject the positioning arm 2601 and the swing arm 2604 while losing the supporting force of the rail 401 in the switch chamber 4; and in order to maintain the positioning arm 2601 perpendicular to the guide rail 201 in the mechanism chamber 2, the positioning arm locking pin 2603 is located at the detent groove 2607 of the slide groove 2606; conversely, when the positioning arm 2601 and the swing arm 2604 are positioned in the horizontal arm 701111, the positioning arm locking pin 2603 is positioned at the other end of the slide groove 2606.

In addition, in order to further ensure the moving balance of the translation device 26, the translation device 26 further comprises a pair of auxiliary brackets 28 fixedly connected to both sides of the operation member 703, each auxiliary bracket 28 is provided with a roller 27, wherein the axial center of the roller 27 of the auxiliary bracket 28 and the axial center of the roller 27 of the positioning arm 2601 are in the same horizontal plane, so that the circuit breaker assembly 7 is always kept in a horizontal state no matter the circuit breaker assembly moves in the switch chamber 4 and/or the mechanism chamber 2.

In addition, in order to secure the heat dissipation of the sealed switch cabinet (switch chamber 4), the inventors have made further improvement on the heat dissipation of the switch cabinet, in which black paint is preferable in view of low cost mainly by adding the heat dissipation channel 403 and coating the inner wall of the switch chamber 4 with a material having excellent heat absorption performance and heat transfer performance. As two preferred embodiments of the heat dissipation channel 403, one is to fold and bend the cabinet walls, as shown in fig. 12, when multiple sets of cabinets are put together, two inflection points of the folding position between two cabinets correspond to each other to form a heat dissipation channel 403, and the cross section of the formed heat dissipation channel may be hexagonal or rhombic according to the different folding shapes. Another way to implement a more artistic heat dissipation channel is to fixedly connect a plurality of hollow metal tubes 404 inside the cabinet wall; as shown in fig. 13, hollow metal pipes 404 extend through the top and bottom surfaces of the switch chamber 4 to form a plurality of heat dissipation channels 403 in communication with the environment, but the switch chamber 4 remains sealed.

In order to enable the switch cabinet to be used as a high-voltage switch cabinet with excellent safety performance, the inventor provides a 'five-prevention' interlocking assembly 29 with extremely high safety coefficient, wherein the protection effect to be realized by the 'five-prevention' interlocking assembly 29 is to start a series of linkage moving along with the circuit breaker assembly 7 to seal the second opening when the circuit breaker assembly 7 is moved out of the switch cabinet and translated to a transfer trolley 33, so that the danger is avoided.

Referring to figure 10, the "five prevention" interlock assembly 29 comprises a linkage 30 and a locking member 31; fig. 14 is a partial enlarged view of the linkage 30(C-C) of the "five-prevention" interlock assembly 29 of the switchgear, and as shown in fig. 14, the linkage 30 includes a first linkage 32, a second linkage 34 and a clutch 35 respectively disposed on a transfer trolley 33 (for assisting the accurate movement of the circuit breaker assembly 7 out of or into the switchgear) in the mechanism chamber 2, and the first linkage 32 and the second linkage 34 transmit motion therebetween through the clutch 35. As a preferred embodiment, the closing of the second opening may be achieved by the roll screen 36 moving downward in synchronization with the movement of the breaker assembly 7 and closing the second opening, so that the deployed area of the roll screen 36 is not smaller than the second opening area. The preferred embodiment of synchronous movement is that the transfer trolley 33 and the switch cabinet are locked and fixed by the locking piece 31, at this time, the clutch piece 35 will transmit the movement of the first linkage piece 32 to the second linkage piece 34 to realize the action linkage between the two linkage pieces, and then the second linkage piece 34 is started by the movement of the breaker assembly 7, the second linkage piece 34 is linked with the first linkage piece 32, and the roller shutter 36 moves downwards along with the linkage of the first linkage piece 32 to complete the safety protection function of closing the second opening.

Referring to fig. 14, a preferred embodiment of the first linkage member 32 in the mechanism chamber 2 is shown: the first linkage piece 32 comprises a first rotating shaft 3201, a first chain 3202, a first gear 3203, a first transmission rotating shaft 3204, a first transmission gear a3205a, a first transmission chain 3206 and a first transmission gear b3207b which are sequentially connected and linked; and first transfer gear a3205a is connected with clutch 35; the rolling screen 36 passes through two coil springs 3601 installed at both ends of the first rotating shaft 3201, so that the movement of the first rotating shaft 3201 will transmit the upward or downward movement of the rolling screen 36. In order to allow the rolling screen 36 to move smoothly, the first chains 3202 are preferably a pair, and each first chain 3202 is in a right triangle by three first gears 3203, and the rolling screen 36 is overlapped with the right-angled side of the right triangle when being completely unfolded downwards; and two ends of the first transmission rotation shaft 3204 are respectively connected with a pair of first gears 3203, preferably a pair of first gears 3203 at acute angles of a horizontal side in a right triangle, and the first transmission gear b3207b and the pair of first gears 3203 are connected with the first transmission shaft 3204 (in the figure, the first transmission gear b3207b is projected to coincide with the first gear 3203). The linkage process of the first linkage 32 is: when the clutch 35 is linked with the first transmission gear a3205a, the first transmission gear a3205a is transmitted to the first transmission gear b3207b through the first transmission chain 3206, the first transmission gear b3207b is continuously transmitted to the first gears 3203 on both sides of the first transmission rotation shaft 3204 through the first transmission rotation shaft 3204, and then is transmitted to the first chain 3202 through the first gear 3203 group, and then is transmitted to the first rotation shaft 3201 through the first chain 3202, thereby realizing the downward or upward movement of the roller blind 36.

Referring to FIG. 15, which is an enlarged partial view of clutch 35(D-D), as shown in FIG. 15, clutch 35 includes a drive pin 3501 and a clutch element 3502 in a coordinated connection, clutch element 3502 being connected to first drive gear a3205 a. When the switch cabinet body is locked with the transfer trolley 33, the transmission pin 3501 is inserted into the clutch element 3502 to realize the engagement of the clutch member 35, so that the transmission between the first linkage member 30 and the second linkage member 34 is realized, and the downward or upward movement of the roller shutter 36 can be realized.

Referring to fig. 15, fig. 15 is an enlarged view of a portion of the second linkage member 34(D-D) showing a preferred embodiment of the second linkage member 34 on the cart 33; as shown in fig. 15, the second linkage member 34 includes a second transmission gear 3401, a second transmission shaft 3402, a second chain 3403, a second rotation shaft 3404 and a second gear 3405, which are connected in a transmission manner, wherein both ends of the second rotation shaft 3404 are connected with a second gear a3405a and a second gear b3405b, which are coaxially driven along with the second rotation shaft 3404; in addition, in order to realize the interlocking assembly 29 and the circuit breaker assembly 7 to move together, the circuit breaker assembly 7 further comprises a rack 37 arranged on the auxiliary bracket 28, and the second linkage member 34 and the circuit breaker assembly 7 move together when the rack 37 is in meshing transmission with the second gear a3405 a. The linkage process of the second linkage member 34 is: when the rack 37 moves to a certain position of the transfer trolley 33 along with the breaker assembly 7, the rack 37 is meshed with the second gear a3405a, the rack 37 continues to transmit the motion of the second gear a3405a and the second gear b3405b which is the same as the second rotating shaft 3404 with the second gear a3405a along with the movement of the breaker assembly 7, the second chain 3403 transmits the motion of the second gear b3405b to the second transmission shaft 3402, the second transmission shaft 3402 drives the second transmission gear 3401, and the second transmission gear 3401 transmits the clutch 35. It should be noted that the distance of movement of the rack 37 with the locking assembly 29, in particular the second linkage member 34, should be no less than the extension of the roller blind 36; in order to save the volume of each element, the second gear 3405 with different diameter can be used, namely the second gear a3405a meshed with the rack 37 is smaller than the second gear b3405b in diameter.

Fig. 16 is an enlarged view of the locking piece 31(E-E) of the "fail safe" interlock assembly of the switchgear; as shown in fig. 14-15, the locking member 31 includes a locking lever 3101, a locking pin 3102 and a locking hole 3103. The pair of lock holes 3103 are provided in the cabinet frame of the mechanism chamber 2. A locking pin 3102 is attached to one end of the locking bar 3101, the locking pin 3102 and the locking bar 3101 are also a pair and are located on the trolley 33, and the locking pin 3102 is shaped to match the locking hole 3103. The pitch of the center lines of the two locking levers 3101 (locking pins 3102) is equal to the pitch of the centers of the two locking holes 3103. The other end of the locking lever 3101 is also provided with a cam handle 3104, which cam handle 3104 is pivotally connected to the locking lever 3101.

The transfer trolley 33 comprises a trolley body 3301 and wheels 3302 for supporting the trolley body to move; the two sides of the trolley body are respectively provided with a transfer trolley guide rail 3303, the transfer trolley guide rails 3303 and the guide rails 201 in the mechanism chamber 2 are positioned in the same horizontal plane, the distance between the two transfer trolley guide rails 3303 is equal to the distance between the two guide rails 201 in the mechanism chamber 2, and the length of the transfer trolley guide rails 3303 is not less than the length of the circuit breaker assembly 6. As a preferred embodiment, in order to better achieve reliable contact between the trolley guide 3303 and the cabinet guide 201 for seamless mating, the locking bar 3101 penetrates through the blocking plate 3304 arranged below the two ends of the trolley guide 3303. When the seamless connection is needed, the cam handle 3104 is firstly rotated left and right to the locking rod 3101, so as to drive the locking pin 3102 to rotate to enable the locking pin to be overlapped with the locking hole 3103, and the transfer trolley 33 is locked with the switch cabinet; the cam handle 3104 is then pressed downward, and since the stop 3304 is fixed, the downward movement of the cam handle 3104 will cause the locking bar 3101 to be pulled away from the switchgear to further eliminate the gap between the locking pin 3102 and the trolley 33. To enable the lockout lever 3101 to be reset in preparation for the next lockout, the lockout lever 3101 houses a spring 31012, which spring 31012 is disposed between the flapper 3304 and another flapper 31011 secured to the lockout lever 3101. In addition, a pair of matched fixing holes 38 and fixing pins 39 are arranged between the breaker assembly 7 and the transfer trolley 33 and used for further stabilizing the breaker assembly 7; the fixing hole 38 is provided on the transfer trolley 33, and the fixing pin 39 is provided on the operation piece 703 of the breaker assembly 7.

FIG. 17 is a flowchart of the operational steps of the "five prevention" interlock assembly of the switchgear; as shown in fig. 17, the operation flow of the "five-prevention" interlock is: when the rack 37 moves to a certain position of the transfer trolley 33 along with the breaker assembly 7, the rack 37 is meshed with the second gear a3405a, the rack 37 continues to drive the second gear a3405a and the second gear b3405b which is coaxial with the second gear a3405a along with the movement of the breaker assembly 7, the second chain 3403 transmits the movement of the second gear b3405b to the second transmission shaft 3402, the second transmission shaft 3402 drives the second transmission gear 3401, the second transmission gear 3401 transmits the clutch 35, when the clutch 35 is linked with the first transmission gear a3205a, the first transmission gear a3205a is transmitted to the first transmission gear b3207b through the first transmission chain 3206, the first transmission gear b3207b continues to be transmitted to the first gears 3203 on two sides of the first transmission rotating shaft 3204 through the first transmission rotating shaft 3204, and then is transmitted to the first gear 3202 through the first transmission chain 3203, so as to realize the upward or downward rolling motion of the curtain 36.

To ensure that the shutter 36 does not retract upward under the resilient action of the coil spring 3601 (not shown) after the circuit breaker assembly 7 is completely moved to the trolley 33, so that the second opening remains open, the inventor further provides a lock assist member 40 that suspends the interlocking action by inserting the lock assist member 40 into the first drive chain 3206. Fig. 18 is a schematic structural diagram of the locking auxiliary element 40, and as shown in fig. 18, the locking auxiliary element 40 is disposed on the inner wall of the cable chamber 3 at a height consistent with the height of the locking hole 3103 of the locking member 31, and includes an auxiliary locking pin 4001 and an auxiliary locking pin control lever 4002, one end of the auxiliary locking pin control lever 4002 is movably connected with the inner wall of the cable chamber 3, and the locking auxiliary element 40 is always close to the inner wall of the cable chamber 3 by a spring disposed at the movable connection, and the other end of the auxiliary locking pin control lever 4002 is fixedly connected with the auxiliary locking pin 4001. The auxiliary locking function of the locking auxiliary element 40 is achieved by the auxiliary locking pin 4001 being inserted into the first chain 3206 of the first link 32 to suspend the movement of the first chain 3206. As a preferred embodiment, when the locking pin 3102 of the locking member 31 is inserted into the locking hole 3103 while the locking pin 3101 jacks up the auxiliary locking pin lever 4002, the auxiliary locking pin 4001 can be moved away from the first chain 3206, and the "five-prevention" interlock assembly can be placed in interlock safety with the movement of the breaker assembly 7; when the roller shade 36 is fully lowered and the circuit breaker assembly has exited the cabinet, the auxiliary locking pin lever 4002 will cause the auxiliary locking pin 4001 to again halt movement of the first chain 3206 by pulling out the locking pin 3102.

Furthermore, since the switch cabinet can be used as a gas-filled cabinet, and a gas-filled valve (not shown) can be provided on the switch chamber 4, the pressure of the gas filling and the gas medium can be determined according to the rated voltage of the electrical equipment or different requirements in specific situations.

Finally, it must be said here that: the above embodiments are only used for further detailed description of the technical solutions of the present invention, and should not be understood as limiting the scope of the present invention, and the insubstantial modifications and adaptations made by those skilled in the art according to the above descriptions of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a cubical switchboard, its includes bus-bar room, instrument room, mechanism room, cable chamber, switch chamber and pressure release channel at least, its characterized in that: the instrument room, the mechanism room and the cable room form a front cabinet of the switch cabinet, the bus room, the switch room and the pressure relief channel form a rear cabinet of the switch cabinet, and an upper incoming line insulator group, a breaker assembly, a grounding switch and a lower outgoing line insulator group are sequentially arranged in the switch room from top to bottom; the circuit breaker subassembly still includes a translation device, and the translation device is located on the support and includes two at least locating arms, the support is equipped with a pair of parallel arrangement's horizontal arm, the horizontal arm is located respectively the both sides of circuit breaker subassembly, and on the horizontal arm was located respectively to two locating arms, the one end and the horizontal arm of locating arm passed through first guide rail location axle pivotal connection and can rotate around first guide rail location axle, and every locating arm is furnished with a swing arm, and the swing arm passes through second guide rail location axle on the horizontal arm and with horizontal arm pivotal connection, and the translation device is used for realizing that the circuit breaker still maintains and moves on same horizontal plane when meetting the step face of co-altitude.

2. The switchgear cabinet as claimed in claim 1, characterized in that: each functional room area in the front cabinet and the rear cabinet is distributed in a step shape.

3. The switchgear cabinet as claimed in claim 1, characterized in that: the top surface of the bus chamber is flush with the top surface of the instrument chamber, and the bottom surface of the bus chamber is higher than the bottom surface of the instrument chamber; the top surface of the switch chamber is lower than the top surface of the instrument chamber but higher than the bottom surface of the instrument chamber, namely the top surface of the switch chamber is higher than the top surface of the mechanism chamber; the bottom surface of the switch chamber is lower than that of the mechanism chamber; the bottom surface of the pressure relief channel is flush with the bottom surface of the cable chamber.

4. The switchgear cabinet as claimed in claim 1, characterized in that: the upper incoming line insulator group, the breaker assembly, the grounding switch and the lower outgoing line insulator group form two groups of isolating switch fractures; the upper static contact of the isolating switch is connected with one end of the upper wiring insulator group, the lower static contact of the isolating switch is connected with the grounding switch, and the two moving contacts of the isolating switch are respectively and independently connected with the two ends of the breaker assembly.

5. The switchgear cabinet as claimed in claim 4, characterized in that: when the two moving contacts are respectively closed with the upper fixed contact and the lower fixed contact, the isolating switch is switched on.

6. The switchgear cabinet as claimed in claim 4, characterized in that: the upper incoming line insulator group penetrates through the top surface or the side wall of the switch chamber and is respectively and partially positioned in the bus chamber and the switch chamber; the lower outgoing insulator group penetrates through the side walls of the switch chamber and the cable chamber and is partially positioned in the switch chamber and the cable chamber respectively.

7. The switchgear cabinet as claimed in claim 4, characterized in that: the central line of the lower outgoing line insulator group is parallel to the bottom surface of the cable chamber.

8. The switchgear cabinet as claimed in claim 4, characterized in that: the number of the upper line-feeding insulators is the same as that of the lower line-outgoing insulators, or the number of the upper line-feeding insulators is twice that of the lower line-outgoing insulator groups.

9. The switchgear cabinet as claimed in claim 4, characterized in that: the lower outgoing line insulators are arranged in a triangular mode.

10. The switchgear cabinet as claimed in claim 1, characterized in that: and a small bus chamber is arranged at the top of the instrument chamber.

11. The switchgear cabinet as claimed in claim 1, characterized in that: the pressure relief channel is realized through a pressure relief valve arranged on the bottom surface or the top surface in the switch chamber.

12. The switchgear cabinet as claimed in claim 1, characterized in that: and the instrument room, the mechanism room and the cable room are all provided with a room door.

13. The switchgear cabinet as claimed in claim 12, characterized in that: the door of the instrument room is provided with a secondary element for control and display.

14. The switchgear cabinet as claimed in claim 1, characterized in that: a reliable grounding element is arranged in the switch chamber.

15. The switchgear cabinet of claim 14, wherein: the reliable grounding element is a grounding moving contact which is arranged on the sidewall of the switch chamber and is provided with a grounding fixed contact and matched with the grounding fixed contact in position, and the grounding moving contact is arranged on the breaker component.

16. The switchgear as claimed in any of claims 1-15, wherein: the mechanism room is provided with a first opening on a plane opposite to the rear cabinet, the switch room is provided with a second opening on a plane opposite to the front cabinet, the bottom end of the second opening is higher than the bottom end of the first opening, the top end of the second opening is not higher than the top end of the first opening, and the bottom end of the first opening and the bottom end of the second opening form a step.

17. The switchgear cabinet of claim 16, wherein: the area of the first opening is larger than that of the second opening.

18. The switchgear cabinet of claim 16, wherein: the second opening is formed by a side wall and/or a front wall of the switching chamber.

19. The switchgear cabinet of claim 16, wherein: the second opening is formed by folding the panels on the side walls of the switch chamber and then surrounding the top wall and the bottom wall of the switch chamber.

20. The switchgear cabinet of claim 16, wherein: the second opening is formed by the side wall of the switch chamber after the panel is folded and the front wall of the switch chamber is surrounded by the removed material.

21. The switchgear cabinet of claim 16, wherein: and a metal fixing piece is welded on the outer periphery of the second opening.

22. The switchgear cabinet of claim 21, wherein: the metal fixing piece selectively welds two side walls, a front wall and/or a top wall and a bottom wall of the switch chamber.

23. The switchgear cabinet of claim 21, wherein: the metal fixing piece is welded on the side wall of the switch chamber and/or the edge formed by bending the side wall.

24. The switchgear cabinet of claim 16, wherein: the circuit breaker assembly comprises a bracket, a circuit breaker, an operating member and a sealing member; the circuit breaker, the sealing element and the operating element are sequentially connected through the bracket.

25. The switchgear cabinet of claim 24, wherein: the switch chamber is communicated with the mechanism chamber through the first opening and the second opening; the circuit breaker assembly is arranged in the switch chamber and the mechanism chamber and penetrates through the first opening and the second opening.

26. The switchgear cabinet of claim 25 wherein: when the switch cabinet is internally communicated, the circuit breaker is positioned in the switch chamber, the operating piece is positioned in the mechanism chamber, the sealing piece seals the second opening, and the switch chamber is in a sealed state.

27. The switchgear cabinet of claim 24, wherein: the breaker is a three-phase vacuum breaker pole.

28. The switchgear of claim 27 wherein: and two ends of the three-phase vacuum circuit breaker pole are respectively provided with a pair of moving contacts.

29. The switchgear cabinet of claim 26, wherein: the seal includes a seal plate and a seal drive shaft, the seal plate closing the second opening.

30. The switchgear of claim 29 wherein: the area of the sealing plate is not smaller than that of the second opening and not larger than that of the first opening.

31. The switchgear of claim 29 wherein: the area of the sealing plate is larger than that of the second opening and smaller than that of the first opening.

32. The switchgear of claim 29 wherein: the sealed transmission shaft comprises a flange, an operation transmission shaft and a corrugated pipe.

33. The switchgear of claim 32 wherein: the operation transmission shaft penetrates through the corrugated pipe and the flange in sequence.

34. The switchgear of claim 32 wherein: the flange is in threaded connection with the sealing plate, and the flange and the corrugated pipe are respectively arranged on two sides of the sealing plate.

35. The switchgear of claim 32 wherein: the operation transmission shaft is divided into a rotating part and a fixing part, and a bearing is arranged between the rotating part and the fixing part.

36. The switchgear of claim 35 wherein: the bearing is an oilless bearing.

37. The switchgear of claim 35 wherein: the fixing part of the operation transmission shaft penetrates through the corrugated pipe, the sealing plate and the flange and is connected with the operation piece to transmit the action of the operation piece.

38. The switchgear of claim 35 wherein: the rotating part of the operating transmission shaft is connected with the rotating shaft through a transmission element for transmission.

39. The switchgear of claim 35 wherein: and two ends of the corrugated pipe are respectively connected with the flange and the outer wall of the fixing part in a sealing manner.

40. The switchgear of claim 39 wherein: and part of the shaft body of the fixing part is a solid body, and the corrugated pipe is connected with the outer wall of the solid body part of the fixing part in a sealing manner.

41. The switchgear of claim 35 wherein: the bellows is compressible and the two ends of the bellows are respectively connected with the flange and the outer wall of the fixing part in a sealing manner.

42. The switchgear of claim 29 wherein: and an annular metal plate is welded on the periphery of the second opening of the switch chamber and is used for connecting and fixing the sealing piece.

43. The switchgear of claim 42 wherein: when the sealing piece seals the switch chamber, the sealing plate and the annular metal plate in the sealing piece are fixed in a threaded mode, and O-shaped gasket grooves matched in shape are formed in opposite surfaces of the annular metal plate and the sealing plate.

44. The switchgear of claim 43 wherein: the screw holes in the annular metal plate do not penetrate through the annular metal plate.

45. The switchgear of claim 42 wherein: the annular metal plate is provided with at least two positioning pins, and the sealing plate is provided with positioning holes matched with the positioning pins in position.

46. The switchgear of claim 29 wherein: the operating part is internally provided with a control element for controlling the circuit breaker to rotate forwards and reversely at 90 degrees so as to realize the opening and closing of the disconnecting switch, and the control element is respectively connected with the operating part and the operating transmission shaft; the movement of the control element can be realized by the movement of a shifting fork which is coaxial with the rotating shaft, and the control element is arranged on the left side of the sealing plate.

47. The switchgear of claim 46 wherein: the control element is fixedly connected with the sealing plate and the bracket through a metal fixing plate and corresponding connecting pieces, and the shifting fork is positioned between the metal fixing plate and the sealing plate; a control rod for operating the control element in the operating member passes through the sealing plate and is linked with the operating member.

48. The switchgear of claim 47 wherein: and the control rod penetrates through the sealing plate and is provided with an O-shaped gasket groove, and the O-shaped gasket is placed and then fixed through screw connection.

49. The switchgear of claim 27 wherein: the support comprises a movable frame and a rotating shaft.

50. The switchgear of claim 49 wherein: the three-phase vacuum circuit breaker pole is fixed on the rotating shaft in parallel arrangement from left to right.

51. The switchgear of claim 49 wherein: the movable frame includes a bracket portion and a connecting portion.

52. The switchgear of claim 51 wherein: the connecting parts are a pair and are arranged in parallel and are respectively and independently connected with two ends of the bracket part.

53. The switchgear of claim 52 wherein: the bracket part is a pair of horizontal arms arranged in parallel, and the horizontal arms are respectively positioned on two sides of the circuit breaker assembly; the connecting part comprises an inverted U-shaped bent arm and two parallel vertical arms; the two ends of the bent arm are respectively connected with the same sides of the two horizontal arms, and the two vertical arms are respectively and independently connected with the other sides of the two horizontal arms.

54. The switchgear of claim 53 wherein: the two vertical arms are respectively screwed on two sides of the sealing piece.

55. The switchgear of claim 54 wherein: one end of the rotating shaft is movably connected with the bent arm.

56. The switchgear of claim 55 wherein: the one end of pivot is equipped with a rotatory round pin, the flexible connection department of curved boom and pivot is equipped with a rotatory hole, rotatory round pin and rotatory hole position match, just rotatory round pin can be in rotatory downthehole internal rotation, thereby realizes three-phase vacuum circuit breaker utmost point post is fixed in the pivot and can be along with the pivot with 90 positive and negative rotations from a left side to right side parallel arrangement.

57. The switchgear of claim 55 wherein: a pair of guide rails is arranged in the switch chamber and is positioned in the middle of the rear cabinet; the mechanism chamber is internally provided with a pair of guide rails and is positioned in the middle of the front cabinet.

58. The switchgear of claim 57 wherein: the space between the guide rails in the switch chamber and the mechanism chamber is equal, and the space between the guide rails and the two horizontal arms of the support is equal.

59. The switchgear cabinet of claim 16, wherein: the switch cabinet is also provided with a positioning element, and the positioning element comprises a pair of positioning holes, an aperture and a positioning bolt, wherein the positioning holes and the aperture and the position are matched on the cabinet wall on one side, close to the wall, of the switch chamber, and the positioning bolt is arranged on the circuit breaker assembly.

60. The switchgear of claim 59 wherein: the top end of the positioning bolt is a cone.

61. The switchgear cabinet as claimed in claim 1, characterized in that: each positioning arm is provided with a positioning arm locking pin, each positioning arm is provided with a swinging arm, the swinging arm is in pivot connection with the horizontal arm through a second guide rail positioning shaft on the horizontal arm, each swinging arm is provided with a sliding groove, and a pin sleeve of the positioning arm locking pin on each positioning arm is arranged in the sliding groove of the corresponding swinging arm.

62. The switchgear cabinet as claimed in claim 1, characterized in that: the positioning arm is composed of two metal arms, the positioning arm is provided with a swing arm, the swing arm is positioned between the two metal arms, one end of the positioning arm is pivotally connected with the horizontal arm through a first guide rail positioning shaft and can rotate around the first guide rail positioning shaft, and the swing arm is pivotally connected with the horizontal arm through a second guide rail positioning shaft on the horizontal arm.

63. The switchgear of claim 62 wherein: and a sliding groove is formed in each swing arm, and a positioning arm locking pin penetrates through the two metal arms and the sliding groove of each swing arm and is welded or riveted with the two metal arms respectively.

64. The switchgear cabinet as claimed in claim 1, characterized in that: the other end of each positioning arm is connected with a roller, and the length of each positioning arm is not less than the length of a step formed by the second opening and the first opening of the switch cabinet.

65. The switchgear of claim 64 wherein: one end of the sliding groove close to the roller is respectively provided with a clamping groove.

66. The switchgear of claim 65 wherein: the number of the positioning arms and the number of the swing arms are 4, and two positioning arms and two swing arms are arranged on each horizontal arm.

67. The switchgear of claim 66 wherein: the first guide rail positioning shaft and the second guide rail positioning shaft are both provided with a spring.

68. The switchgear of claim 67 wherein: the translation device is configured and used for moving the breaker assembly on a guide rail in a switch chamber through the translation device when the breaker assembly needs to be pulled out of the switch cabinet for detection, all the positioning arms and the swing arms are accommodated in the horizontal arms under the action of gravity of the breaker assembly and the fixed supporting force of the guide rail, and when the rollers on one group of positioning arms closest to the sealing plate leave the guide rail of the switch chamber, the rollers of the positioning arms lose the fixed supporting force of the guide rail; namely, under the action of gravity of the circuit breaker assembly, the positioning arm and the swing arm are put down along the vertical direction to leave the horizontal arm, the positioning arm is changed from the horizontal direction to the vertical direction, meanwhile, the length of the positioning arm compensates the height difference of the step-shaped guide rail, the circuit breaker assembly still moves on the same horizontal plane through a roller of the positioning arm, namely, the circuit breaker assembly continues to move on the guide rail of the mechanism chamber, otherwise, when the circuit breaker assembly needs to be pushed into the switch cabinet chamber, an operator needs to push the circuit breaker assembly to move through the bracket, at the moment, the positioning arm still has the vertical direction, when a group of swing arms closest to the steps of the switch chamber and the mechanism chamber in the translation device are contacted with the end faces of the step corners to generate extrusion force, under the action of the extrusion force, the swing arms rotate upwards, and simultaneously, the positioning arm locking pins on the positioning, finally, the positioning arm locking pin moves to the other end of the sliding groove, the positioning arm and the swinging arm of the group are accommodated in the horizontal arm, and the roller of the positioning arm rolls on the guide rail of the switch cabinet; at this point, the circuit breaker assembly is pushed forward, and when all the positioning arms and the swinging arms are accommodated in the horizontal arm, the roller in the horizontal arm can move on the guide rail of the switch cabinet completely.

69. The switchgear cabinet of claim 16, wherein: except the second opening, the other switch chamber walls are closed.

70. The switchgear cabinet of claim 16, wherein: the switch chamber also includes at least one heat dissipation channel.

71. The switchgear of claim 70 wherein: the heat dissipation channel is formed by folding and bending the chamber walls of the switch chambers, and when the switch cabinets are spliced and placed, the inflection points of the folding positions between the two switch cabinets correspond to each other to form the heat dissipation channel.

72. The switchgear of claim 71 wherein: the cross section of the heat dissipation channel is hexagonal or rhombic.

73. The switchgear of claim 70 wherein: the switch chamber inner wall fixed connection a plurality of cavity tubular metal resonator, and the tubular metal resonator runs through the top surface and the bottom surface of switch chamber and forms a plurality of heat dissipation channels that communicate with the environment.

74. The switchgear cabinet as claimed in claim 4, characterized in that: the lower static contact is connected with the grounding switch through an L-shaped metal connecting piece.

75. The switchgear of claim 74 wherein: the metal connecting piece comprises a vertical part and a horizontal part, one side of the vertical part is connected with the insulator of the grounding switch, and the other end of the vertical part is connected with the bus; the horizontal part is connected with the lower static contact.

76. The switchgear cabinet of claim 16, wherein: the switch chamber is also provided with an inflation valve.

77. The switchgear cabinet of claim 16, wherein: the switch cabinet is also provided with an isolating switch observation window, and the isolating switch observation window consists of an observation window A and an observation window B, wherein the observation window A is arranged in the instrument room, and the observation window B is arranged in the switch room.

78. The switchgear of claim 77 wherein: the observation window A and the observation window B are concentric and have increasing areas.

79. The switchgear of claim 77 wherein: the area of the observation window A is smaller than that of the observation window B.

80. The switchgear of claim 77 wherein: the observation window B is opened through a plane which is opposite to the switch chamber and the instrument chamber respectively, and a transparent sealing window is arranged on the inner side of the opening of the switch chamber.

81. The switchgear cabinet of claim 16, wherein: the switch cabinet is also provided with a grounding switch observation window which consists of an observation window C and an observation window D, wherein the observation windows C and D are respectively arranged in the cable chamber.

82. The switchgear of claim 81 wherein: the observation windows C and D are concentric and increase in area.

83. The switchgear of claim 81 wherein: the area of the observation window C is smaller than that of the observation window D.

84. The switchgear of claim 81 wherein: the observation window D is respectively opened on the plane opposite to the switch chamber and the instrument chamber, and a transparent sealing window is arranged on the inner side of the opening of the switch chamber.

85. The switchgear cabinet of claim 16, wherein: the switchgear cabinet further comprises an interlock assembly that closes the second opening when the circuit breaker assembly is removed from the switchgear cabinet.

86. The switchgear of claim 85 wherein: the interlocking assembly comprises a linkage piece, a roller shutter, a locking piece and a transfer trolley, the transfer trolley is locked with the switch cabinet through the locking piece, then the linkage piece is started, and the second opening is closed through the roller shutter which moves with the linkage piece.

87. The switchgear of claim 86 wherein: the transfer trolley is used for assisting the circuit breaker assembly to move out of or into the switch cabinet.

88. The switchgear of claim 87 wherein: the rolling screen has an unwinding area not smaller than the second opening area.

89. The switchgear of claim 88 wherein: the linkage part comprises a first linkage part arranged in the mechanism chamber, a second linkage part arranged on the transfer trolley and a clutch part; the first linkage piece and the second linkage piece transmit motion through the clutch piece; the transfer trolley and the switch cabinet are locked and fixed through the locking piece, the clutch piece transmits the motion of the first linkage piece to the second linkage piece, the second linkage piece is started through the motion of the breaker assembly, the second linkage piece is linked with the first linkage piece, and the roller shutter moves downwards along with the linkage of the first linkage piece to close the second opening.

90. The switchgear of claim 89 wherein: the first linkage piece comprises a first rotating shaft, a first chain group, a first gear, a first transmission rotating shaft, a first transmission gear a, a first transmission chain and a first transmission gear b which are sequentially connected and linked; the first transmission gear a is connected with the clutch piece; the roller shutter is arranged in the mechanism chamber through two coil springs at two ends of the first rotating shaft, so that the first rotating shaft moves to drive the roller shutter to move upwards or downwards; the linkage process of the first linkage piece is as follows: when the clutch piece is linked with the first transmission gear a, the first transmission gear a is transmitted to the first transmission gear b through the first transmission chain, the first transmission gear b is continuously transmitted to the first gears on two sides of the first transmission rotating shaft through the first transmission rotating shaft, then the first chain is transmitted through the first gear set, and then the first rotating shaft is transmitted through the first chain, so that the downward or upward movement of the roller shutter is realized.

91. The switchgear of claim 90 wherein: the first chains are in a pair, each first chain forms a right-angled triangle through three first gears, and the roller shutter is overlapped with the right-angled side of the right-angled triangle when being unfolded completely downwards.

92. The switchgear of claim 91 wherein: the first transmission rotating shaft is connected with a pair of first gears at the acute angles of the horizontal edges in the right-angled triangle.

93. The switchgear of claim 90 wherein: the second linkage part comprises a second transmission gear, a second transmission shaft, a second chain, a second rotating shaft, a second gear a and a second gear b which are connected and driven in sequence, wherein the two ends of the second rotating shaft are connected with the second gear a and the second gear b which are coaxially driven along with the second rotating shaft.

94. The switchgear of claim 93 wherein: the circuit breaker assembly also comprises a rack arranged on the auxiliary bracket, and when the rack is meshed with the second gear a for transmission, the second linkage part moves with the circuit breaker assembly.

95. The switchgear of claim 94 wherein: the linkage process of the second linkage part is as follows: when the rack moves to a certain position of the transfer trolley along with the breaker assembly, the rack is meshed with the second gear a, the rack continues to move along with the breaker assembly to transmit the second gear a and the second gear b which is the same as the second gear a and a second rotating shaft, the second chain transmits the motion of the second gear b to the second transmission shaft, the second transmission shaft drives the second transmission gear, and the second transmission gear transmits the clutch piece.

96. The switchgear of claim 95 wherein: the movement distance of the rack driving the interlocking component is not less than the unfolding distance of the roller shutter.

97. The switchgear of claim 95 wherein: the moving distance of the second linkage member is not less than the unwinding distance of the roller shutter.

98. The switchgear of claim 95 wherein: the second gear a is smaller in diameter than the second gear b.

99. The switchgear of claim 95 wherein: the clutch piece comprises a drive pin and a clutch element which are connected in a coordination manner, and the clutch element is connected with the first drive gear a.

100. The switchgear of claim 99 wherein: when the switch cabinet body is locked with the transfer vehicle, the transmission pin is inserted into the clutch element to realize the engagement of the clutch piece, thereby realizing the transmission between the first linkage piece and the second linkage piece, namely realizing the downward or upward movement of the roller shutter.

101. The switchgear of claim 100 wherein: the locking piece comprises a locking rod, a locking pin and a locking hole; the locking holes are a pair and are respectively arranged on the cabinet body frame of the mechanism chamber; the locking pin is connected with one end of the locking rod, the locking pin and the locking rod are also a pair and are positioned on the transfer trolley, and the shape of the locking pin is matched with that of the locking hole.

102. The switchgear of claim 101 wherein: the distance between the central lines of the two locking rods is equal to the distance between the centers of the two locking holes.

103. The switchgear of claim 102 wherein: the other end of the locking rod is also provided with a cam handle which is pivotally connected with the locking rod.

104. The switchgear of claim 103 wherein: the transfer trolley comprises a trolley body and wheels for supporting the trolley body to move; the two sides of the trolley body are respectively provided with a transfer trolley guide rail, the transfer trolley guide rails and the guide rails in the mechanism chamber are positioned in the same horizontal plane, and the distance between the two transfer trolley guide rails is equal to the distance between the two guide rails on the inner side of the mechanism chamber, namely the two transfer trolley guide rails are equal in height and equal in distance to the guide rails in the mechanism chamber; the length of the transfer car guide rail is not less than the length of the breaker assembly.

105. The switchgear of claim 104 wherein: the pair of locking rods respectively penetrate through the baffle plates arranged below two ends of the guide rail of the transfer trolley, and the cam handle and the locking rods are respectively positioned on two sides of the baffle plates.

106. The switchgear of claim 105 wherein: the locking rod is sleeved with a spring, and the spring is arranged between the baffle and the other baffle fixed on the locking rod.

107. The switchgear of claim 104 wherein: the circuit breaker subassembly still is equipped with a pair of fixed orifices and the fixed pin of matching with the transportation workshop for further firm circuit breaker subassembly.

108. The switchgear of claim 107 wherein: the fixed hole is arranged on the transfer trolley, and the fixed pin is arranged on an operating piece of the circuit breaker assembly.

109. The switchgear of claim 107 wherein: the switch cabinet also comprises a locking auxiliary element which is used for stopping the movement of the interlocking component.

110. The switchgear of claim 109 wherein: the locking auxiliary element is arranged on the inner wall of the cable chamber with the height consistent with that of the locking hole of the locking piece and comprises an auxiliary locking pin and an auxiliary locking pin control rod, one end of the auxiliary locking pin control rod is movably connected with the inner wall of the cable chamber, and the locking auxiliary element is always close to the inner wall of the cable chamber through a spring arranged at the movable connection position; the other end of the auxiliary locking pin control rod is fixedly connected with an auxiliary locking pin.

111. The switchgear of claim 110 wherein: the auxiliary locking pin is inserted into the first chain of the first linkage member to suspend the movement of the first chain to achieve the suspension of the movement of the linkage assembly.

112. The switchgear of claim 111 wherein: when the locking pin of the locking piece is inserted into the locking hole, the auxiliary locking pin control rod is jacked up by the locking pin, the auxiliary locking pin leaves the first chain at the moment, and then the interlocking assembly can perform interlocking safety protection along with the movement of the circuit breaker assembly; and when the roller shutter is completely put down and the breaker assembly leaves the switch cabinet body, the auxiliary locking pin control rod drives the auxiliary locking pin to stop the movement of the first chain again by pulling out the locking pin.