CN104051975B - Breaker assembly - Google Patents

Abstract

The invention provides a circuit breaker assembly. The circuit breaker assembly includes a bracket, a circuit breaker, an operating part and a seal; the circuit breaker, the sealing part and the operating part are sequentially connected through the bracket, and the seal makes the When the circuit breaker assembly is placed in the switch cabinet, the circuit breaker operates in a sealed state. Compared with the prior art, the circuit breaker assembly provided by the present invention can be removed and disassembled, and the maintenance is simple; when the circuit breaker is in normal use, it cooperates with the switch cabinet to provide the circuit breaker with a working space isolated from the external environment, free from dust 1. Moist air affects performance, meets the high economic and reliability requirements of the power system for circuit breakers, and greatly improves the continuity of power supply operation.

Description

A circuit breaker assembly

technical field

The invention relates to equipment in a switch cabinet, in particular to a circuit breaker assembly used in a switch cabinet, and belongs to the technical field of electrical equipment.

Background technique

High-voltage switchgear is an electrical product used to realize on-off, control or protection in power system generation, transmission, distribution, power conversion and consumption. The high-voltage switch manufacturing industry is an important part of the power transmission and transformation equipment manufacturing industry, and occupies a very important position in the entire power industry. However, the circuit breaker is a key part of the whole switchgear, and the classification of the switchgear is also related to the position of the circuit breaker in the switchgear.

At present, the high-voltage switchgears (circuit breaker switchgears) of 6-40.5KV at home and abroad mainly include fixed switchgears (fixed cabinets), central or removable switchgears (handcart cabinets), inflatable cabinets (gas-filled cabinets) and Solid insulation switchgear, the above-mentioned high-voltage switchgears have their own advantages and disadvantages.

The fixed cabinet is the first generation of high-voltage switchgear products. The cabinet body and internal components are all fixedly connected. The structure is simple, the components are few, the heat dissipation is good, the connection of the conductive bus bar is reliable, the stability is relatively high, the cabinet size is small and the floor space is small. Small; but faults need to be inspected and repaired. Because of the fixed connection method, the entire line needs to be powered off, and disassembly is troublesome, which makes the maintenance time of the fixed cabinet long and thus leads to a long power outage time, which brings great impact on power transmission. the inconvenience.

In order to improve the problems existing in the fixed cabinet, the handcart switch cabinet adjusts the position of the circuit breaker in the cabinet, and integrates the circuit breaker and a car body into a movable handcart circuit breaker, and the circuit breaker can be partially pulled out of the cabinet during maintenance. , easy to replace; but due to the requirement of clear distance between conductors, the size of the handcart cabinet is larger than that of the fixed cabinet and there are more auxiliary insulators. According to the position of the circuit breaker in the cabinet, it can be divided into central cabinet and removable cabinet; the positioning and locking devices of the circuit breaker handcart in these switch cabinets are all set at the bottom of the handcart, limited by its own structure, this type The positioning and locking devices are generally suitable for small current switchgear, and cannot withstand large electromotive torque. Because when the short-circuit current of the switchgear reaches 50kA and above, the generated electromotive force is very large, and the electromotive force is generated at the connection between the moving contact of the handcart and the static contact of the switchgear. Due to the large distance between the electromotive force action point and the bottom of the handcart, a large torque is likely to be generated relative to the bottom handcart positioning device, and the handcart is prone to loosening and shifting, resulting in the disengagement of the dynamic and static contacts. The middle-mounted handcart cabinet is unreliable due to the unreliable sliding connection of the primary plug, resulting in contact heating, and its structure has poor heat dissipation, often causing accidents such as insulation aging and explosion due to overheating. Therefore, the existing handcart positioning and locking methods are difficult to meet the high current and high breaking requirements of the switchgear. In order to improve the stability of the handcart switch cabinet in the closing channel, there are a lot of improvements in the prior art about the handcart fixing methods and devices. For example, Chinese patent application CN 102983524 discloses a switchgear circuit breaker handcart, including a car The head of the car body is provided with a moving contact, and the two sides of the car body are respectively provided with a positioning plate; the positioning plate is provided with a guide wheel that matches the track groove of the handcart positioning device, and a guide wheel that is compatible with the handcart positioning device. An elastic lock rod that matches the test position lock hole and the work position lock hole. The positioning device disclosed in this application and the switchgear circuit breaker handcart obtained by its application can realize the accurate guidance and left and right limit of the handcart, and can meet the stable positioning of the handcart in different positions, which can effectively reduce the loss of electric power. The acting torque can overcome the large electric force; however, it still cannot achieve the same or similar stability as that of the fixed cabinet; in addition, the circuit breaker in the cabinet generally adopts VS1 or VD4 vacuum circuit breaker, and the alignment of the dynamic and static contacts is accurate and consistent with that of the fixed cabinet. If it cannot be monitored, the structure of the contact box is not conducive to the heat dissipation of the contacts, the insulation components are easy to age, and insulation breakdown discharge accidents occur.

Both of the above two switchgears have two disadvantages: they occupy a large space and the primary circuit live main components are not completely enclosed in the switchgear. The development of these two types of switch cabinets is mainly based on these two characteristics. In addition, both the fixed cabinet and the handcart cabinet are open, that is, the switchgear, circuit breaker and connecting parts in the cabinet are directly exposed to the atmosphere, the enclosure protection level is low, the applicability is poor, and it is sensitive to the ambient air quality, so it is difficult to It is suitable for operating conditions in the south of my country, coastal areas and underground places with severe condensation and pollution. At the same time, because there are cooling holes or cooling fans, the air circulates in the power distribution cabinet, which is easily affected by dust and humid air, which is more likely to cause equipment oxidation and reduce the surface insulation performance, thereby shortening the service life of the equipment. Provide a workspace that is isolated from the surrounding environment.

In order to solve the problem that the environment has a great influence on the switchgear and provide a sealed working space for the circuit breaker, a sealed inflatable cabinet, such as C-GIS, was developed subsequently; SF6 is filled inside to increase the pressure in the cabinet to ensure the insulation performance, and the size of the cabinet can be reduced by reducing the insulation clearance, and the protection level is high IP, which solves the problem of environmental impact on the equipment; but there are still air leakages, When there is an air leak, the equipment will not be able to operate normally due to insufficient insulation distance, and the safety hazard is great, and accidents are prone to occur; in addition, because the structural elements are integrated with the cabinet, when the equipment needs to be repaired or replaced, it cannot be used. Realize the detection, maintenance and replacement of parts or individual components, so that it can only be used as a one-time power distribution cabinet, and the maintenance cost is extremely high; the overall replacement also greatly increases the scope and time of power outages, reducing the continuity of power supply; in addition, the inflatable cabinet Another shortcoming is that the SF6 filled in the cabinet has been listed as a greenhouse gas, which belongs to the list of emission reductions, which is contrary to China's vigorous promotion of energy conservation and emission reduction.

In recent years, the newly introduced solid insulation switchgear is different from the above-mentioned switchgear in that it adopts a solid insulation method for insulation. The so-called solid insulation is different from the solid-sealed pole in that it not only seals the vacuum interrupter of each item, but also casts the interrupter and its related components with epoxy resin as a whole, so that the switch The safe insulation distance between the internal phases and the ground has been shortened from 125mm for air insulation to the millimeter level, although the size and volume of the switchgear has been greatly reduced; the switchgear is green and environmentally friendly, suitable for distribution network automation, and has strong resistance to environmental pollution; but due to its The solid insulation is formed by the solid insulation method. The solid insulation is susceptible to moisture aging, the insulation performance is reduced, and it cannot be monitored and supervised in real time. On the contrary, it is prone to insulation breakdown discharge accidents; the production process is complex, and the insulation material with high performance and good stability It is a major difficulty for solid insulated switchgear. In addition, this type of switchgear also has the disadvantage of fixed cabinets. It is extremely inconvenient to detect and repair if a fault occurs; domestic companies are still in further research and development, while foreign imports are expensive and costly.

Therefore, how to improve the structure of the circuit breaker in the switch cabinet and the working mode in the switch cabinet, while reducing the volume of the switch cabinet and making the maintenance convenient and flexible, but making the circuit breaker work in a sealed environment is an urgent need to solve The problem.

Contents of the invention

In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a circuit breaker assembly, which is applied in a switch cabinet, cooperates with the switch cabinet to provide a space for the circuit breaker to be isolated from the external environment and to ensure circuit breaker The operation of the circuit breaker prolongs the service life of the circuit breaker.

In order to achieve the above-mentioned purpose of the invention, the present invention provides a circuit breaker assembly, which includes a bracket, a circuit breaker, an operating member, and a seal; the circuit breaker, the seal, and the operating member are sequentially connected through the bracket, and the seal The component enables the circuit breaker to operate in a state of isolation from the environment outside the switch cabinet when the circuit breaker assembly is placed in the switch cabinet.

In order to further illustrate the working principle of the circuit breaker assembly applied in the switchgear, the switchgear of another patent application of the present inventor is taken as an example for illustration. The switchgear is a floor-standing assembled cabinet structure, including busbar room, instrument room (low voltage room), mechanism room, cable room, switch room and pressure relief channel; the instrument room, mechanism room and cable room form the front cabinet of the switch cabinet A. In the front cabinet A, there are instrument room, mechanism room and cable room from top to bottom; the bus room, switch room and pressure relief passage form the rear cabinet B of the switch cabinet. In the rear cabinet B, they are in order from top to bottom It is the busbar room, the switch room and the pressure relief channel; the switch room from top to bottom is the upper incoming line insulator group, the circuit breaker assembly, the grounding switch and the lower outgoing line insulator group; among them, the front cabinet A and the rear cabinet B of the switch cabinet Each functional room area is preferably distributed in steps. There is an opening between the switch room and the mechanism room of the switch cabinet, the first opening is provided on the plane opposite the mechanism room and the rear cabinet B, and the second opening is provided on the plane opposite the switch room and the front cabinet A, and the bottom end of the second opening is as high as At the bottom end of the first opening and the top end of the second opening is not higher than the top end of the first opening, the bottom end of the first opening and the bottom end of the second opening form a step. The switch chamber communicates with the mechanism chamber through the first opening and the second opening; the circuit breaker assembly is built in the switch chamber and the mechanism chamber, and passes through the first opening and the second opening. When there is a passage in the switch cabinet, the circuit breaker is located in the switch room, the operating part is located in the mechanism room, and the sealing part closes the second opening, and the switch room is in a sealed state at this time. However, the circuit breaker assembly provided by the present invention is not limited to be used in the above switch cabinet structure.

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 the front wall of the switching chamber.

More preferably, the second opening is formed by surrounding the top wall and the bottom wall of the switch chamber after the panel is folded from the side wall of the switch chamber.

More preferably, the second opening is formed by folding the panel on the side wall of the switch chamber and surrounding the front wall of the switch chamber by removing material.

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

Preferably, the sealing member includes a sealing plate and a sealing transmission shaft, wherein when the switch cabinet is opened (closed), the sealing plate closes the second opening. As a preferred embodiment, 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 sealing plate has an area larger than that of the second opening and smaller than that of the first opening.

Preferably, the sealed drive shaft comprises a flange, an operating drive shaft and a bellows.

More preferably, the operating drive shaft runs through the bellows and the flange in sequence.

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

More preferably, the opposite surfaces of the flange and the sealing plate are respectively provided with shape-matching O-ring grooves; preferably, after placing the O-ring in the O-ring groove, the flange and the sealing plate are fixed and sealed by screwing.

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

More preferably, the fixed portion of the operating transmission shaft passes through the bellows, the sealing plate and the flange, and is connected with the operating member to transmit the action of the operating member.

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

More preferably, both ends of the bellows are respectively sealed and connected to the 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 is sealingly connected to the outer wall of the solid part of the fixing part, preferably by welding.

It is worth mentioning that the bellows is compressible and its two ends are respectively sealed and connected to the flange and the outer wall of the fixed part. When the drive shaft is operated to drive the circuit breaker to open and close, the drive shaft is operated to move left and right. The seal is welded between the flange and the operating drive shaft to form a seal buffer area to the left of the seal plate.

Preferably, in order to make the sealing member firmly close the switch chamber, an annular metal fixing member, preferably an annular metal plate, is welded to the outer periphery of the second opening of the switch chamber; it is used to connect and fix the sealing member, preferably a sealing plate; It is used to prevent the deformation of the outer peripheral edge of the second opening and to connect with other parts and stabilize the connection.

More preferably, the welding method of the metal fixing member and the second opening depends on the forming process of the second opening, and the metal fixing member can selectively weld the two side walls, the front wall and/or the top wall and the bottom wall of the switch chamber . As a preferred welding method, the metal fixing member is welded on the side wall of the switch chamber and/or on 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 screwed and fixed, and the opposite surfaces of the annular metal plate and the sealing plate are provided with matching O-ring grooves for fixing the O-ring Then it is fixed and sealed by screw connection.

More preferably, the screw holes on the annular metal fixing member do not penetrate through the annular metal plate.

More preferably, at least two positioning pins are provided on the annular metal fixing member, and positioning holes matching the positions of the positioning pins are provided on the sealing plate.

More preferably, the operating part is provided with a control element that controls the circuit breaker to rotate forward and backward at 90° to realize the opening and closing of the disconnector. The control elements are respectively connected to the operating part and the operation transmission shaft; The movement of the shift fork of the shaft center is realized, and the control element is arranged on the left side of the sealing plate.

More preferably, the control element is fixedly connected to the sealing plate and the bracket through a metal fixing plate and corresponding connecting pieces, and the shift fork is located between the metal fixing plate and the sealing plate; the control rod in the operating part that manipulates the control element passes through the sealing plate Linked with the operator.

More preferably, the control rod for manipulating the control element in the operating part passes through the sealing plate to link with the operating part, and the control rod is provided with an O-ring groove through the sealing plate, and after the O-ring is placed, it is fixed by screwing to ensure seal.

Preferably, the support includes a moving frame and a rotating shaft, and the poles of the three-phase vacuum circuit breaker are arranged in parallel and fixed on the rotating shaft from left to right.

Preferably, the mobile frame includes a bracket part and a connecting part.

More preferably, there is a pair of connecting parts, and two ends of the independent connecting bracket parts are arranged in parallel.

More preferably, the support part is a pair of horizontal arms arranged in parallel, and the horizontal arms are respectively located on both sides of the circuit breaker assembly; the connecting part includes an inverted U-shaped curved arm and two parallel vertical arms; the two ends of the curved arms are respectively connected On the same side of the two horizontal arms, the two vertical arms are independently connected to the other side of the two horizontal arms.

More preferably, the two vertical arms are respectively screwed to the two sides of the seal.

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

More preferably, a rotating pin is provided at one end of the rotating shaft, and a rotating hole is provided at the flexible connection between the curved arm and the rotating shaft, the position of the rotating pin matches the rotating hole, and the rotating pin can rotate in the rotating hole, thereby realizing a three-phase vacuum circuit breaker The poles are arranged in parallel from left to right and fixed on the rotating shaft, and can rotate forward and backward at 90° along with the rotating shaft.

Another object of the present invention is to provide a circuit breaker assembly, so that the switchgear using the circuit breaker assembly has the flexibility of the handcart cabinet and the high protection level of the sealed switchgear. The circuit breaker assembly also includes a translation device ( It can also be a stepped support for circuit breaker components), and the translation device is used to realize that the circuit breaker still moves on the same horizontal plane when encountering step surfaces of different heights.

Preferably, the translation device is arranged on the bracket, wherein: the translation device is arranged on the bracket and includes at least two positioning arms, which are respectively arranged on the horizontal arms of the bracket part; one end of the positioning arm and the horizontal arm are pivoted through the first guide rail positioning shaft Rotating connection and can rotate around the positioning axis of the first guide rail. Each positioning arm is provided with a positioning arm locking pin. Each positioning arm is equipped with a swing arm. The swing arm is connected with the second guide rail positioning shaft on the horizontal arm. The horizontal arms are pivotally connected, each swing arm is provided with a slide groove, and the pin of the positioning arm locking pin on each positioning arm is sleeved in the slide groove of the corresponding swing arm.

As another preferred mode, the translation device is arranged on the bracket and includes at least two positioning arms, which are respectively arranged on the horizontal arms of the bracket part; the positioning arm is composed of two metal arms, and the positioning arm is equipped with a swing arm, and the swing arm Located between the two metal arms, one end of the positioning arm is pivotally connected to the horizontal arm through the first guide rail positioning shaft and can rotate around the first guide rail positioning shaft. The swing arm is connected to the horizontal arm through the second guide rail positioning shaft on the horizontal arm. The arms are pivotally connected, each swing arm is provided with a sliding groove, and the locking pin of the positioning arm penetrates through the sliding grooves of the two metal arms and the swing arm, and the two metal arms are respectively welded or riveted, and the ends of the sliding grooves close to the rollers are respectively set With card slot.

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

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

More preferably, there are four positioning arms and four swing arms, and two positioning arms and two swing arms are provided on each horizontal arm.

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

It is worth mentioning that the translation device is configured for when the circuit breaker assembly needs to be pulled out of the switch cabinet for detection, the circuit breaker assembly first moves on the guide rail in the switch room through the translation device, and all the positioning arms and swing arms are in the circuit breaker assembly. Under the action of gravity and the fixed support force of the guide rail, they are all stored in the horizontal arm. When the rollers on the positioning arm closest to the sealing plate leave the guide rail of the switch room, the rollers of the positioning arm will lose the fixed support force of the guide rail; That is, under the gravity of the circuit breaker assembly, the positioning arm and the swing arm will be lowered in the vertical direction and leave the horizontal arm, and the positioning arm will change from the horizontal direction to the vertical direction. The rollers of the arm make the circuit breaker assembly still move on the same level, that is, continue to move on the guide rail of the mechanism room. Conversely, when the circuit breaker assembly needs to be pushed into the switch cabinet room, the operator needs to push the circuit breaker assembly to move through the bracket. At this time, the positioning arm is still in the vertical direction. When a group of swing arms in the translation device closest to the steps of the switch chamber and the mechanism chamber will contact the right-angled end face of the step to generate extrusion force, under the action of extrusion force, The swing arm rotates upwards, and at the same time drives the locking pin of the positioning arm on the positioning arm to slide in the sliding groove, thereby driving the positioning arm to rotate upwards, and finally makes the locking pin of the positioning arm move to the other end of the sliding groove. At this time, the positioning arm of the group and the swing arm are stored in the horizontal arm, and the rollers of the positioning arm will roll on the guide rail of the switch cabinet; at this time, continue to push the circuit breaker assembly forward, and when all the positioning arms and swing arms are stored in the horizontal arm, the horizontal The rollers in the arm can move completely on the guide rails of the switchgear.

Compared with the prior art, the circuit breaker assembly provided by the present invention can be removed and disassembled, and the maintenance is simple; when the circuit breaker is in normal use, it cooperates with the switch cabinet to provide the circuit breaker with a working space isolated from the external environment, free from dust 1. Moist air affects performance, meets the high economic and reliability requirements of the power system for circuit breakers, and greatly improves the continuity of power supply operation.

Description of drawings

Fig. 1 is a sectional view of a circuit breaker assembly provided by the present invention applied in a switch cabinet;

Fig. 2 is a sectional view of the circuit breaker assembly provided by the present invention;

Fig. 3 is a partially enlarged view (A-A) when the sealing plate in the switchgear provided by the present invention is connected with the annular metal plate;

Fig. 4 is the perspective view of the sealed transmission shaft in the switchgear provided by the present invention;

Fig. 5 is the front view when the circuit breaker assembly provided by the present invention seals the switch chamber;

Fig. 6 is the perspective view of the circuit breaker assembly provided by the present invention in the switch cabinet;

Fig. 7 is a schematic diagram of the working principle and structure of the translation device in the circuit breaker assembly provided by the present invention;

Fig. 8 is a schematic diagram of the working principle and structure of the translation device in the circuit breaker assembly provided by the present invention;

Fig. 9 is a partially enlarged view of the translation device (B-B) in the circuit breaker assembly provided by the present invention.

detailed description

The present invention will be further described in detail and completely below in conjunction with specific implementation methods and accompanying drawings.

The invention provides a circuit breaker assembly. When the circuit breaker assembly is applied in a switch cabinet, the circuit breaker part in the circuit breaker assembly can be operated in a sealed state, so as to realize the sealed working environment of the circuit breaker. In order to further illustrate the working principle of the circuit breaker assembly in the switch cabinet to achieve a sealed working environment, the switch cabinet structure of another patent application by the inventor is used as an example for illustration, but the circuit breaker assembly provided by the present invention is not limited to this used in switchgear. The switchgear is an indoor switchgear, as shown in Figure 1, the switchgear is a floor-standing assembled cabinet structure, which includes busbar room 0, instrument room 1 (low voltage room), mechanism room 2, cable room 3, and switch room 4 and the pressure relief channel 5, specifically, the instrument room 1, the mechanism room 2 and the cable room 3 form the front cabinet A of the switch cabinet, and the busbar room 0, the switch room 4 and the pressure relief channel 5 form the rear cabinet B of the switch cabinet; the front cabinet The bottoms of A and rear cabinet B are flush and placed on the ground or other planes, and the opposite cabinet walls of front cabinet A and rear cabinet B are attached and flexibly connected to the state of use or delivery of the switch cabinet; for clarity and brevity Describe the further structure of the switchgear. The opposite surface where the front cabinet A and the rear cabinet B are bonded is called the back of the front cabinet A (the cabinet wall on this surface is referred to as the rear wall), and the rear cabinet B and the front cabinet A are bonded together. The opposite side of the cabinet is called the front of the rear cabinet B (the cabinet wall on this side is called the front wall for short). The fit is preferably a seamless fit, and the movable components are preferably bolts. In the front cabinet A, there are instrument room 1, mechanism room 2 and cable room 3 from top to bottom, and in the rear cabinet B, there are bus room 0, switch room 4 and pressure relief channel 5 from top to bottom. As a preferred embodiment, the front cabinet A is installed by combining the frame cabinet body with the partition board and the panel, or combining and installing the cabinet bodies of each functional room area through the panel, and the back of the front cabinet A is in an open state; The busbar room 0 and the switch room 4 in the rear cabinet B are installed in combination of closed or non-closed cabinets. Inside the switch room 4 from top to bottom are the upper incoming line insulator group 6 , the circuit breaker assembly 7 , the grounding switch 8 and the lower outgoing line insulator group 9 . The upper static contact 10 (or moving contact) of the isolating switch is independently connected to one end of the upper incoming line insulator group 6, and the lower static contact 11 (or moving contact) is independently connected to the grounding switch group 8, and the isolating switch The moving contacts 12 (or static contacts) of the isolating switch are independently connected to both ends of the circuit breaker assembly 7; the specific distribution of the moving and static contacts of the isolating switch is not fixed here, and can be selected according to actual needs. The branch busbars are respectively connected to the lower outlet insulator and the grounding switch (the connection here is omitted in the figure). When the moving contacts at both ends of a pole are respectively closed with the upper static contact and the lower static contact, the isolating switch is closed, that is, the isolating switch in the switch cabinet is in the open state (when the circuit breaker is closed, the circuit in the cabinet is channel state). The functional rooms in the front cabinet A and rear cabinet B of the switchgear are distributed in steps. In other words, as shown in Figure 1, the top surface of the busbar room 0 is flush with the top surface of the instrument room 1, and the bottom surface of the busbar room 0 (the top surface of the switch chamber 4) is higher than the bottom surface of the instrument chamber 1, the top surface of the switch chamber 4 is lower than the top surface of the instrument chamber 1 but higher than the bottom surface of the instrument chamber 1 (the 2 top surface of the mechanism chamber), and the switch chamber 4 The bottom surface of the pressure relief channel 5 (the top surface of the pressure relief channel 5) is lower than the bottom surface of the mechanism room 2 (the top surface of the cable room 3), the bottom surface of the pressure relief channel 5 (the bottom surface of the rear cabinet B) and the bottom surface of the cable room 3 (the front cabinet A bottom surface) flush. In order to reduce the cost of the switchgear and simplify the structure, the pressure relief channel 5 can be realized by a pressure relief valve installed on the bottom or top surface of the switch chamber 4; and the metal bracket is preferably made of stainless steel.

In order to illustrate the structure and working principle of the circuit breaker assembly provided by the present invention, the application of the above circuit breaker assembly 7 in the above switch cabinet is taken as an example, so as to realize the cooperation of the switch cabinet to provide the circuit breaker assembly 7 with a space isolated from the external environment, free from Dust, moist air affect performance. An opening 14 is provided between the switch chamber 4 and the mechanism chamber 2, that is, a first opening (not marked in the figure) is provided on the plane opposite to the rear cabinet B of the mechanism chamber 2, and a first opening is provided on the plane opposite to the front cabinet A of the switch chamber 4. Two openings (not marked in the figure), the bottom of the second opening is higher than the bottom of the first opening and the top of the second opening is not lower than the top of the first opening, that is, the area of the first opening is greater 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 a step 15, that is, the switch chamber 4 communicates with the mechanism chamber 2 through the first opening and the second opening. As shown in FIG. 1 , the circuit breaker assembly 7 is built in the switch chamber 4 and the mechanism chamber 2 and passes through the first opening and the second opening.

As a preferred embodiment, in order to achieve fewer production processes, that is, to reduce welding processes, in order to further explain that the production process of the second opening is determined by the molding method of the switch cabinet, such as panel splicing or folding When the panel (folding the panel to form at most 4 faces) is spliced with the panel to form; the second opening is formed by the side wall and/or the front wall of the switch chamber 4 . A kind of forming mode of the second opening is that the opposite side wall of the switch chamber 4 is folded to form a second opening with the top wall and the bottom wall of the switch chamber after folding the panels, that is, the left side wall of the switch chamber 4 is folded to the right to form the switch chamber. The right side wall of 4 is folded to the left, cooperates the top wall and the bottom wall of switch chamber 4 to surround simultaneously, forms the second opening like this. One way of forming the second opening is that the front wall of the switch chamber 4 is formed by removing material, and the area of the removed material is equal to the size of the second opening. The second opening may also be formed by combining the above two methods. In order to prevent the outer periphery of the second opening from deforming and to connect with other parts and stabilize the connection, an annular metal fixing part is welded on the outer periphery of the second opening, and the annular metal fixing part is a metal annular plate. The welding method of the metal fixing part and the second opening depends on the forming process of the second opening. The metal fixing part can selectively weld the two side walls, the front wall and/or the top wall and the bottom wall of the switch chamber. As a preferred welding method, the metal fixing member is welded on the side wall of the switch chamber and/or on the edge formed by bending the side wall.

Different from the circuit breaker assembly in the prior art, the circuit breaker assembly 7 provided by the present invention includes a sealing member 704 in addition to its bracket 701, circuit breaker 702 and operating part 703; FIG. 2 shows the circuit breaker assembly 7, as shown in Figures 1 and 2, from left to right in the Y direction, the circuit breaker assembly 7 is connected to the circuit breaker 702, the sealing member 704 and the operating member 703 through the bracket 701 in sequence from left to right. The circuit breaker 702 is preferably a pole of a three-phase vacuum circuit breaker, and one or two pairs of movable contacts 12 are respectively provided at both ends of the pole.

The bracket 701 includes a moving frame 7011 and a rotating shaft 7012. The moving frame 7011 includes a bracket part 70111 and a connecting part 70112. The connecting parts 70112 are a pair, arranged in parallel and independently connecting two ends of the bracket part 70111. The bracket part 701111 is a pair of horizontal arms 701111 arranged in parallel, and the horizontal arms 701111 are respectively located on both sides of the circuit breaker assembly 7 . The connecting part 70112 includes an inverted U-shaped curved arm 701121 and two parallel vertical arms 701122; the two ends of the curved arm 701121 are respectively connected to the same side of the two horizontal arms 701111, and the two vertical arms 701122 are independently connected to the two horizontal arms The other side of 701111; two vertical arms 701122 are respectively screwed on both sides of the seal 704. One end of the rotating shaft 7012 is movably connected with the curved arm 701121; a preferred embodiment for realizing the articulated connection is realized through a matching rotating pin and a rotating hole (not shown in the figure), and one end of the rotating shaft 7012 is provided with a rotating pin, and the curved arm 701121 There is a rotating hole at the movable connection with the rotating shaft 7012, the position of the rotating pin matches the rotating hole, and the rotating pin can rotate in the rotating hole, so that the poles of the three-phase vacuum circuit breaker are arranged in parallel and fixed on the rotating shaft 7012 from left to right And it can be rotated forward and backward by 90° along with the rotating shaft 7012.

The sealing member 704 includes a sealing plate 7041 and a sealing drive shaft 7042, wherein when the switchgear is opened (closing), 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) to close the second opening, and now the switch chamber 4 is in a sealed state. As one of the preferred manners, 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 can firmly seal the switch chamber 4, the outer periphery of the second opening of the switch chamber is welded with an annular metal fixing plate, and the annular metal fixing plate is the annular metal fixing member 401; FIG. A-A partial enlarged view of Fig. 3, when the seal 704 seals the switch chamber 4, the sealing plate 7041 and the annular metal plate 401 are screwed and fixed, and the opposite surfaces of the annular metal plate 401 and the sealing plate 7041 are provided with shapes Matching O-type gasket groove 16 is used to fix the O-type gasket and then fix and seal by screwing.

It is worth mentioning that, in order to further ensure the sealing effect, the inventor further improved the structure of the seal 704, especially the seal transmission shaft 7042. Figure 4 is a perspective view of the seal transmission shaft 7042, as shown in Figure 4, the seal transmission shaft 7042 includes flange 70421 , operating drive shaft 70422 and bellows 70423 . The flange 70421 is screwed to the sealing plate 7041, and preferably on the opposite surface of the flange 70421 and the sealing plate 7041, a shape-matching O-ring groove is arranged in turn, and then the O-ring is placed and then fixed and sealed by screwing (here the gasket groove Same as the prior art, not shown in the figure). The operation drive shaft 70422 is divided into a rotating part 704221 and a fixed part 704222, wherein in order to ensure the rotation and transmission of the operation drive shaft 70422, a bearing 704223 is provided between the rotating part 704221 and the fixed part 704222, preferably an oil-free bearing. One end of the operation transmission shaft 70422 (fixed part 704222) passes through the bellows 70423, the sealing plate 7041 and the flange 70421 to connect with the operation member 703 to transmit the action of the operation member 703; the other end of the operation transmission shaft 70422 is connected to the rotating shaft through the transmission element 7031 7012 is connected to the transmission, and the transmission element 7031 (preferably a crank arm, such as a seven-character crank arm) enables the opening and closing of the circuit breaker 702 through transmission, that is, the arc extinguishing chamber (vacuum bubble or vacuum tube) of the pole of the three-phase vacuum circuit breaker opening and closing. Part of the shaft body in the fixing part 704222 is a solid body, and the bellows 70423 is a non-rigid bellows 70423, that is, a compressible bellows 70423 and its two ends are respectively sealed (welded) to the flange 70421 and the outer wall of the fixing part 704222, among which It is welded to the outer wall of the solid part of the fixed part 704222. Therefore, when the drive shaft 70422 is operated to drive the breaker to open and close, the drive shaft 70422 is operated to move left and right (the operation of the drive shaft 70422 to move left and right in the operating part is a prior art, and will not be described in detail here), and the bellows 70423 is Its seal is welded between the flange 70421 and the operating transmission shaft 70422 to form a sealing buffer area on the left side of the sealing plate 7041, and the left side of the sealing buffer area (in the switch chamber 4) can still maintain a sealed state, especially It is to ensure that the seal can be maintained under the action of great air pressure, and the compressibility of the bellows 70423 does not affect the left and right movement of the operating drive shaft 70422 to realize the opening and closing of the circuit breaker; in other words, through the flange 70421 and the bellows 70423 When the sealing member 704 is used in conjunction with the switch chamber, the opening and closing of the circuit breaker 702 and the opening and closing of the isolating switch will not be affected.

Figure 5 is a front view of the switchgear when the seal 704 seals the switch chamber 4 (in order to better express the sealing state, the operator 703 on the right side of the seal 704 and the door 21 of the mechanism chamber 2 are omitted in the figure), As shown in FIG. 5 , in order to better seal the seal 704 with the switch chamber 4 , at least two positioning pins 17 are provided on the extension of the second opening of the switch chamber 4 , and the sealing plate 7041 is provided with matching positioning holes 18 , The positioning pins are preferably arranged on the annular metal plate; a set of positioning elements 19 are also added, specifically a pair of positioning holes 1901 on the cabinet wall on the wall side of the switch room are matched with the aperture, shape and position. The positioning pin 20 arranged on the circuit breaker assembly 7 .

For a more reasonable allocation structure, the inventor further improved the structure of the circuit breaker assembly 7, the control element 7032 in the operating part 703 controls the circuit breaker 702 to rotate forward and reverse at 90° to realize the opening and closing of the disconnector, and the control element 7032 is respectively connected to The movement of the operating member 703 and the operating transmission shaft 70422 can be realized by the movement of the shift fork 70311 coaxial with the rotating shaft 7012 . The movement of the shift fork 70311 can be realized in a common way in the prior art, such as through the transmission of a locator moving back and forth on the screw mandrel to realize the rotation of the shift fork 70311, which will not be described in detail here. However, the control element 7032 is different from the prior art in that the control element 7032 is arranged on the left side of the sealing plate 7041 instead of being arranged in the operating part 703. As shown in FIG. 2, the control element 7032 passes through a metal fixing plate 70312 and The corresponding connecting piece is fixedly connected with the sealing plate 7041 and the bracket 701, and the shift fork 70311 is located between the metal fixing plate 70312 and the sealing plate 7041; however, the control rod 7033 for manipulating the control element 7032 in the operating member 703 passes through the sealing plate 7041 Linked with the operating part 703, in order to ensure the sealing effect of the sealing part 704, similarly, the control rod 7303 should be provided with an O-shaped gasket at the place where the control rod 7303 penetrates through the sealing plate 7041 and then fixed by bolts to ensure the sealing, or a small flange and corresponding O-ring grooves are implemented. In addition, the principle of connecting the control element 7032 to the operating transmission shaft 70422 and the operating member 703 without affecting the opening and closing of the disconnector is the same as the prior art, and will not be repeated here.

Fig. 6 is a perspective view of the circuit breaker assembly in the switch cabinet; When the line is straight, the isolating switch in the switch cabinet is in the closed passage state; the upper incoming line insulator group 6 runs through the top surface or side wall of the switch room 4, and is placed in the bus room 0; the lower outgoing line insulator group 9 runs through the switch room 4 and the cable The side wall of the chamber 3, that is, the lower outlet insulator group 9 is partly located in the switch chamber 4, and the other part is located in the cable chamber 3, and the center line of the lower outlet insulator group 9 is preferably parallel to the switch cabinet (the bottom surface of the cable chamber 3) ; The number of incoming line insulator groups 6 and the number of lower outgoing line insulator groups 9 can be set according to actual needs. As a preferred embodiment, the number of upper incoming line insulator sets 6 can be the same as the number of lower outgoing line insulator sets 9, or the number of upper incoming line insulator sets 6 can be twice that of the lower outgoing line insulator sets 9; for example, switch room 4 There can be six upper incoming line insulator groups 6, and three lower outgoing line insulator groups 9, so the busbar can be installed with one connection and one connection or one connection and two installations to meet the needs of transmitting different bus currents. In order to ensure that the clear space between the busbars meets the regulations (not less than 125mm in the air medium), the three lower outlet insulators 9 are arranged in a triangle, preferably an isosceles triangle or an equilateral triangle. The instrument room 1, the mechanism room 2 and the cable room 3 are all equipped with doors, and the door of the instrument room 1 is provided with secondary components for control and display, such as function buttons and display screens.

It is worth mentioning that, in order to observe the working status of the circuit breaker assembly 7 in real time, especially the isolation fracture between the moving contact 12 and the static contact (10, 11), the switch cabinet is also provided with an isolating switch observation window 22, As shown in Figure 6, the isolation switch observation window 22 is composed of two observation windows A2201 and B2202 respectively located in the instrument room 1 and the switch room 4. The observation windows A2201 and B2202 are preferably concentric and have an increasing area, or observation window A2201 The area of the observation window B2202 is smaller than that of the observation window B2202; in addition, in order to maintain the sealed state of the switchgear, the observation window B2202 passes through the plane openings 2203 opposite the switch chamber 4 and the instrument chamber 1, and a transparent sealing window 23 is provided inside the opening of the switch chamber 4 , The sealing window 23 is selected from a transparent material with stable high-pressure resistance, such as transparent glass or plastic. Similarly, in order to realize the real-time monitoring of the grounding switch, the switchgear is also provided with the grounding switch observation window 24. The observation windows 24 are located in the cable chamber 3 and the switch chamber 4 respectively, and other structures and positional relationships can be adjusted according to the specific position of the earthing switch 8 with reference to the structural position of the isolation switch observation window 22 .

In order to ensure the safety of the switch cabinet, a reliable grounding element 25 is added in the switch room 4, specifically, a ground static contact 2501 and a ground moving contact matching the position of the ground static contact are arranged on the side wall of the switch room 4 respectively. 2502, the grounding movable contact 2502 can be arranged on the circuit breaker assembly 7; wherein the grounding movable and static contacts can be interchanged, and installing the static contact on the circuit breaker assembly 7 will facilitate maintenance and replacement.

In addition, in order to further reduce the volume of the switchgear, the grounding switch 8 can connect the lower static contact 11 with the grounding switch 8 through an L-shaped metal connector 801 under the premise of retaining the original function, so that the grounding switch 8 and the bottom A group of post insulators and wires are reduced in the connection between the static contacts 11, thereby reducing the size and volume of the switch chamber 4. One side of the vertical part 8011 of the metal connector 801 is connected to the insulator of the grounding switch 8 , and the other end is connected to the bus bar; the horizontal part 8012 is connected to the lower static contact 11 .

It is worth mentioning that the function of handcart movement of the circuit breaker assembly in the switch cabinet can be realized by adding rollers 27 to the horizontal arm 701111 of the bracket part 70111 in the bracket 701 and guide rails arranged in the switch cabinet. Preferably, The guide rails (402, 201) are arranged on the two side walls of the switch chamber 4 and the mechanism chamber 2; as a preferred embodiment, the guide rails 402 of the switch chamber 4 are located in the middle of the entire switch cabinet together with the central cabinet. However, due to the stepped cabinet arrangement and the sealing function of the circuit breaker assembly 7, there is a step 15 between the switch chamber 4 and the mechanism chamber 2, so the circuit breaker assembly 7 overcomes the stepped movement when it is moved out of the switch cabinet. Therefore, in order to cooperate with the smooth push and pull of the circuit breaker assembly 7 on the guide rails of different steps, the inventor researched and developed a translation device 26 for the circuit breaker assembly 7, which can realize the circuit breaker assembly 7, especially The circuit breaker 702 can still move at the same level when encountering step surfaces of different heights. In order not to complicate the structure of the switch cabinet, the inventor integrated the structure of the bracket 701 of the circuit breaker assembly and the translation device 26 . Translating device 26 is located on support 701, wherein: the distance between a pair of horizontal arms 701111 of support 701 and the distance between guide rails 402 on the two side walls of switch chamber 4 (the guide rails 201 on the two side walls of mechanism chamber 2) are all equal in width, that is, horizontal The rollers 27 provided on the arm 701111 can move along the guide rails (402, 201) respectively. 7 and 8 are schematic diagrams of the working principle and structure of the translation device 26 . Translation device 26 includes at least two positioning arms 2061, which are respectively arranged on horizontal arms 701111 (as a preferred embodiment, there are four positioning arms 2601, and two positioning arms 2601 are set on each horizontal arm 701111), positioning One end of the arm 2601 is pivotally connected with the horizontal arm 701111 by a first guide rail positioning shaft 2602 and can rotate around the first guide rail positioning shaft 2602. Each positioning arm 2601 is provided with a positioning arm locking pin 2603. Each positioning arm 2601 is equipped with a swing arm 2604, and the swing arm 2604 is pivotally connected with the horizontal arm 701111 through a second guide rail positioning shaft 2605 on the horizontal arm 701111, and each swing arm 2604 is provided with a sliding groove 2606, and each positioning arm 2601 The positioning arm locking pin 2603 on the top is sleeved in the sliding groove 2606 of the corresponding swing arm 2604, and one end of each positioning arm 2601 is connected with a roller 27, and the length (height) of the positioning arm 2601 is compatible with the second opening and the first opening. The formed steps have the same length (height), that is, the same height as the step 15 . When the circuit breaker assembly 7 needs to be pulled out of the switch cabinet for testing, the circuit breaker assembly 7 first moves on the guide rail 402 in the switch room 4 through the translation device 26, and all the positioning arms 260 and the swing arms 2604 act on the gravity of the circuit breaker assembly 7 Under the action of the fixed support force of the guide rail and the guide rail, they are all accommodated in the horizontal arm 701111. And when the rollers 27 on a group of positioning arms 2601 closest to the sealing plate 7041 leave the guide rail 402 of the switch chamber 4, the rollers 27 of the positioning arm 2601 will lose the fixed support force of the guide rail 402; Next, the positioning arm 2601 and the swing arm 2604 will be put down in the vertical direction and leave the horizontal arm 701111, and the positioning arm 2601 will change from the horizontal direction to the vertical direction, and the length of the positioning arm 2601 will make up for the height difference of the above-mentioned stepped guide rail through the positioning arm 2601. The rollers 27 make the circuit breaker assembly 7 still move on the same horizontal plane, that is, continue to move on the guide rail 201 of the mechanism room 2 . Conversely, when the circuit breaker assembly 7 needs to be pushed into the switch cabinet room, the operator needs to push the circuit breaker assembly 7 to move through the bracket 701. At this time, the positioning arm 260 is still in a vertical direction. When the translation device 26 is closest to the switch room 4 A group of swing arms 2604 at the step 15 of the mechanism room 2 will contact with the end face of the step corner to generate extrusion force. Under the action of the extrusion force, the swing arm 2604 rotates upwards, and at the same time drives the positioning on the positioning arm 2601. The arm locking pin 2603 slides in the sliding groove 2606, thereby driving the positioning arm 2601 to rotate upwards, and finally the positioning arm locking pin 2603 moves to the other end of the sliding groove 2606. At this time, the positioning arm 2601 and the swinging arm 2604 of the group are all accommodated In the horizontal arm 701111, the roller 27 of the positioning arm 2601 will roll on the guide rail 402 of the switch cabinet 4; at this time, continue to push the circuit breaker assembly 7 forward, then when all the positioning arms 2601 and swing arms 2604 are closed in the horizontal arm 701111 When inside, the roller 27 in the horizontal arm 701111 can completely move on the guide rail 402 of the switch cabinet.

As a better embodiment, FIG. 9 is a B-B partial enlarged view of a translation device 26 in a switch cabinet provided by the present invention. As shown in FIG. 9, 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 runs through the sliding groove 2606 of the two metal arms and the swing arm 2604 and welds or rivets the two metal arms respectively; for better The support of the translation device is fixed and the moving direction is fixed, that is, the positioning arm 2601 can only move 90 degrees downward from the horizontal arm 701111 to move back to the horizontal arm 701111 in a vertical or opposite direction, and the sliding groove 2606 is close to the positioning shaft 2602 of the first guide rail. One end is respectively provided with a locking groove 2607, and the first and second guide rail positioning shafts (2602, 2603) are provided with a spring (not shown in the figure) to realize that the translation device 26 loses the support force of the guide rail 401 in the switch chamber 4 At the same time, the positioning arm 2601 and the swing arm 2604 can be automatically ejected; and in order to maintain the positioning arm 2601 perpendicular to the guide rail 201 in the mechanism room 2, the positioning arm locking pin 2603 is located at the locking groove 2607 of the sliding groove 2606; otherwise, when positioning When the arm 2601 and the swing arm 2604 are located in the horizontal arm 701111, the positioning arm locking pin 2603 is located at the other end of the sliding groove 2606.

In addition, in order to further ensure the movement balance of the translation device 26, the translation device 26 also includes a pair of auxiliary brackets 28 fixedly connected to both sides of the operating member 703, and each auxiliary bracket 28 is provided with a roller 27, wherein the auxiliary bracket 28 rollers The axis of the positioning arm 27 and the axis of the positioning arm 2601 roller 27 are at the same level, so that the circuit breaker assembly 7 is always kept horizontal no matter whether it is moving in the switch room 4 and/or the mechanism room 2 .

In addition, in order to achieve a better working and operating environment, an air charging valve (not shown) can be provided on the switch chamber 4, so the pressure and pressure of the air charging can be determined according to the rated voltage of the electrical equipment or the different needs in specific situations. gas medium.

Finally, it is necessary to explain here that: the above examples are only used to further describe the technical solutions of the present invention in detail, and cannot be interpreted as limiting the protection scope of the present invention. Some non-essential improvements and adjustments all belong to the protection scope of the present invention.

Claims (33)

1. a kind of breaker assembly it is characterised in that：Described breaker assembly includes support, chopper, operating parts and sealing Part；Described chopper, sealing member and operating parts pass sequentially through support and connect, and described sealing member makes described breaker assembly be placed in one When in switch cubicle described chopper in switch cubicle external environment isolation under run；Described sealing member includes sealing plate and sealing Power transmission shaft；Described seal transmission shaft includes flange, operation power transmission shaft and corrugated tube；Described operation power transmission shaft is divided into rotation section and consolidates Determine portion, between described rotation section and fixed part, be provided with bearing, described flange is spirally connected described sealing plate, and described sealing plate both sides divide Wei not described flange and corrugated tube.

2. breaker assembly as claimed in claim 1 it is characterised in that：Described operation power transmission shaft sequentially passes through described corrugated tube And flange.

3. breaker assembly as claimed in claim 1 it is characterised in that：Described flange and sealing plate opposite face be sequentially provided with The O-shaped gasket groove of form fit.

4. breaker assembly as claimed in claim 1 it is characterised in that：Described bearing is oilless bearing.

5. breaker assembly as claimed in claim 1 it is characterised in that：The fixed part of described operation power transmission shaft passes through described ripple Stricture of vagina pipe, sealing plate and flange, and be connected with described operating parts to transmit the action of described operating parts.

6. breaker assembly as claimed in claim 1 it is characterised in that：The rotation section of described operation power transmission shaft is passed through one and is driven Element is connected transmission with rotating shaft.

7. breaker assembly as claimed in claim 1 it is characterised in that：The two ends of described corrugated tube are tightly connected described respectively Flange and fixed part outer wall.

8. breaker assembly as claimed in claim 7 it is characterised in that：The part axis body of described fixed part is solid, and Described sylphon seal connects the outer wall of described fixed part solid part.

9. as described breaker assembly arbitrary in claim 1-8 it is characterised in that：Described corrugated tube is compressible and it Two ends are tightly connected flange and fixed part outer wall respectively, when operating transmission shaft driven circuit-breaker switching on-off action, operation transmission Axle is to move left and right, and corrugated tube defines one and is located at a sealing plate left side between flange and operation power transmission shaft because of its sealing welding The sealing buffer area of side.

10. breaker assembly as claimed in claim 1 it is characterised in that：Described support includes movable stand and rotating shaft.

11. breaker assemblies as claimed in claim 10 it is characterised in that：Described chopper is three-phase vacuum breaker pole Post.

12. breaker assemblies as claimed in claim 11 it is characterised in that：Described three-phase vacuum breaker pole is from left to right Arranged in parallel it is fixed in described rotating shaft.

13. breaker assemblies as claimed in claim 11 it is characterised in that：A pair of moving contact of each group of disconnecting switch is respectively Positioned at described three-phase vacuum breaker pole two ends.

14. breaker assemblies as claimed in claim 10 it is characterised in that：Described movable stand includes cradle portion and connecting portion.

15. breaker assemblies as claimed in claim 14 it is characterised in that：Described connecting portion is a pair, and be arranged in parallel point The two ends of the not independent described cradle portion of connection.

16. breaker assemblies as claimed in claim 14 it is characterised in that：Described cradle portion is the level of a pair of parallel setting Arm, described horizontal arm is located at the both sides of described breaker assembly respectively；It is flat that described connecting portion includes an inverted U curved boom and two The armstand of row；The two ends of described curved boom connect the homonymy of two described horizontal arms respectively, two described armstands company independently Connect the opposite side of two horizontal arms.

17. breaker assemblies as claimed in claim 16 it is characterised in that：Two described armstands are bolted in described sealing respectively The both sides of part.

18. breaker assemblies as claimed in claim 17 it is characterised in that：Described rotating shaft one end is with described curved boom activity even Connect.

19. breaker assemblies as claimed in claim 18 it is characterised in that：One end of described rotating shaft is provided with a rotating dog, institute The active connection place stating curved boom with rotating shaft is provided with a rotating hole, described rotating dog and rotating hole location matches, and described rotating dog Can rotate in rotating hole.

20. breaker assemblies as claimed in claim 12 it is characterised in that：Be provided with described operating parts control chopper with 90 ° of positive and negative rotations are to realize the control element of disconnecting switch divide-shut brake.

21. breaker assemblies as claimed in claim 20 it is characterised in that：Described control element attended operation part and close respectively Envelope power transmission shaft.

22. breaker assemblies as claimed in claim 21 it is characterised in that：Described control element attended operation part and close respectively The operation power transmission shaft of envelope power transmission shaft.

23. breaker assemblies as claimed in claim 20 it is characterised in that：The motion of described control element pass through one with described The motion of the concentric shift fork of rotating shaft is realized, described control element be arranged at described sealing plate left side.

24. breaker assemblies as claimed in claim 23 it is characterised in that：Described control element pass through a metal fixing plate with And corresponding connector is fixedly connected with described sealing plate and support, described shift fork positioned at described metal fixing plate and sealing plate it Between；The control bar manipulating this control element in described operating parts passes through described sealing plate to link with operating parts.

25. breaker assemblies as claimed in claim 24 it is characterised in that：Described control bar run through sealing plate place be provided with O-shaped Gasket groove, and place after O-shaped packing ring again by the fixation that is spirally connected.

26. breaker assemblies as claimed in claim 19 it is characterised in that：Described breaker assembly also includes a translation dress Put.

27. breaker assemblies as claimed in claim 26 it is characterised in that：Described translating device is on support and at least Including two registration arm, it is respectively arranged on two horizontal arms of cradle portion；One end of described registration arm passes through first with horizontal arm Guide rail locating shaft is pivotally connected and can rotate around the first guide rail locating shaft, is provided with registration arm lock in each described registration arm Rationed marketing, each described registration arm is furnished with a swing arm, described swing arm by the second guide rail locating shaft on horizontal arm with Horizontal arm is pivotally connected, and each described swing arm is provided with sliding tray, the pin of the registration arm stop pin in each described registration arm It is set in the sliding tray of corresponding described swing arm.

28. breaker assemblies as claimed in claim 26 it is characterised in that：Described translating device and includes on support At least two registration arm, are respectively arranged on two horizontal arms of cradle portion；Described registration arm is two metal arm compositions, described fixed Position arm is furnished with a swing arm, and described swing arm is located between two metal arms, and one end of described registration arm and horizontal arm pass through First guide rail locating shaft is pivotally connected and can rotate around the first guide rail locating shaft, and described swing arm passes through the on horizontal arm Two guide rail locating shafts and be pivotally connected with horizontal arm, each described swing arm is provided with sliding tray, and described registration arm stop pin Run through the sliding tray of two metal arms and swing arm and be respectively welded or rivet two described metal arms.

29. breaker assemblies as described in claim 27 or 28 it is characterised in that：Described first and second guide rail locating shafts are equal It is provided with a spring.

30. breaker assemblies as described in claim 27 or 28 it is characterised in that：Described registration arm and swing arm are 4, And two described registration arm and swing arm are set on each described horizontal arm.

31. breaker assemblies as claimed in claim 26 it is characterised in that：Described translating device also includes a pair being fixedly connected In the auxiliary stand of operating parts both sides, each described auxiliary stand is equipped with roller.

32. breaker assemblies as claimed in claim 31 it is characterised in that：The axle center of described auxiliary stand roller and registration arm It is in same level perpendicular to the described axle center switching roller during indoor guide rail.

Arbitrary described breaker assembly in 33. such as claim 1-8 it is characterised in that：Described switch cubicle include front cabinet and after Cabinet, breaker assembly is arranged between front cabinet and rear cabinet, and the rear cabinet of maintained switch cabinet is isolated with external environment.