阅读说明：本技术 便于检修的碰接连接式断路器隔离本体小车 (Bump-connection type circuit breaker isolation body trolley convenient to overhaul ) 是由 王俊峰 王玉堂 赵改兰 纵兆丽 申小伟 兰志恒 任宝平 贾宏云 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种便于检修的碰接连接式断路器隔离本体小车,解决了如何实现断路器隔离本体小车检修完成重回工作轨道的便捷操作的问题。在U形缺口上面的小车车体底架板固定设置有小车驱动舌升降导轨块(2),在小车驱动舌升降导轨块的后立面上设置有小车驱动舌升降导轨凹槽(3)和小车驱动舌块(12),在小车驱动舌升降导轨块上设置有沿上下竖直方向设置的拨杆穿过长条通孔(4),在小车驱动舌升降导轨块的前立面上固定连接有U形块(6),短拨杆(17)的后端活动插接在小车驱动舌块(12)上的驱动舌块升降拨孔(14)中,在U形块(6)的U形槽中活动设置有长拨杆(22)。整体小车隔离可以与推进机构快速锁定和分离,操作便捷。(The invention discloses a convenient-to-overhaul touch connection type breaker isolation body trolley, which solves the problem of how to realize convenient operation of completing the re-returning of a working track during overhaul of the breaker isolation body trolley. A trolley body chassis plate above the U-shaped notch is fixedly provided with a trolley driving tongue lifting guide rail block (2), a rear vertical face of the trolley driving tongue lifting guide rail block is provided with a trolley driving tongue lifting guide rail groove (3) and a trolley driving tongue block (12), a deflector rod arranged along the vertical direction from top to bottom is arranged on the trolley driving tongue lifting guide rail block and penetrates through a strip-shaped through hole (4), a U-shaped block (6) is fixedly connected on a front vertical face of the trolley driving tongue lifting guide rail block, the rear end of a short deflector rod (17) is movably inserted in a driving tongue block lifting deflector hole (14) on the trolley driving tongue block (12), and a long deflector rod (22) is movably arranged in the U-shaped groove of the U-shaped block (6). The whole trolley is isolated, can be quickly locked and separated from the propelling mechanism, and is convenient to operate.)

1. A convenient-to-overhaul bump-connected circuit breaker isolation body trolley comprises a circuit breaker isolation body trolley body underframe, a trolley body underframe plate is arranged on the circuit breaker isolation body trolley body underframe, and is characterized in that a U-shaped notch is arranged at the center of the front end side face of the trolley body underframe plate, a trolley driving tongue lifting guide rail block (2) is fixedly arranged on the trolley body underframe plate above the U-shaped notch, a trolley driving tongue lifting guide rail groove (3) is arranged on the rear vertical face of the trolley driving tongue lifting guide rail block (2), a trolley driving tongue block (12) is movably arranged in the trolley driving tongue lifting guide rail groove (3), a pressure spring limiting plate connecting screw hole (9) is arranged at the top end of the trolley driving tongue lifting guide rail block (2), a deflector rod arranged along the vertical direction up and down is arranged on the trolley driving tongue lifting guide rail block (2) to penetrate through a strip-shaped through hole (4), the shifting lever passes through the strip through hole (4) and is communicated with the groove (3) of the lifting guide rail of the driving tongue of the trolley, a U-shaped block (6) is fixedly connected on the front elevation of the lifting guide rail block (2) of the driving tongue of the trolley, the U-shaped groove of the U-shaped block (6) and the shifting lever pass through the strip through hole (4) and are communicated together, a rear pin shaft (19) and a front pin shaft (20) are respectively arranged in the U-shaped groove of the U-shaped block (6), a pressure spring installation counter bore (15) is arranged on the top end surface of the driving tongue block of the trolley (12), an inclined plane (13) is arranged at the bottom end of the rear elevation of the driving tongue block of the trolley (12), a lifting shifting hole (14) of the driving tongue block is arranged at the center of the driving tongue block of the trolley (12), a short shifting lever (17) is movably arranged in the strip through hole, a rear pin shaft (19) penetrates through a pin shaft on the short deflector rod (17) and penetrates through the long through hole (18), the rear end of the short deflector rod (17) is movably inserted in a driving tongue block lifting deflector hole (14) on the trolley driving tongue block (12), a long deflector rod (22) is movably arranged in a U-shaped groove of the U-shaped block (6), the rear part of the long deflector rod (22) is hinged with a front pin shaft (20), and the rear end of the long deflector rod (22) is hinged with the front end of the short deflector rod (17) through a connecting pin (21); a pressure spring limiting plate (11) is connected to the pressure spring limiting plate connecting screw hole (9), and a pressure spring (16) is arranged between the pressure spring limiting plate (11) and a pressure spring mounting counter bore (15).

2. The easy-to-overhaul trolley of the disconnecting body of the bump-connected circuit breaker according to claim 1, wherein a U-shaped block (6) is provided with a rear pin shaft through hole (7) and a front pin shaft through hole (8), a rear pin shaft (19) is movably connected in the rear pin shaft through hole (7), a front pin shaft (20) is movably connected in the front pin shaft through hole (8), a cover plate (23) is connected to the rear vertical surface of the trolley driving tongue lifting guide rail block (2), and the trolley driving tongue lifting guide rail block (2) is connected to the underframe plate of the trolley body through a fixing bolt (10); the bottom of the deflector rod penetrating through the strip through hole (4) is provided with a short deflector rod limiting step (5).

Technical Field

The invention relates to a mining high-voltage power distribution cabinet, in particular to a propelling trolley of a circuit breaker isolation body in the mining high-voltage power distribution cabinet.

Background

The underground high-voltage power distribution cabinets are all provided with circuit breaker isolation bodies, the circuit breaker isolation bodies realize the cut-off of a high-voltage power supply circuit through the separation of moving contacts and static contact seats, the static contact seats are fixedly arranged on a middle partition plate in the high-voltage power distribution cabinet, the moving contacts and a voltage transformer are arranged on a circuit breaker isolation body trolley, and the connection and disconnection of the moving contacts and the static contact seats are completed through the pushing and pulling of the circuit breaker isolation body trolley through manual operation; at present, in a coal mine underground high-voltage power distribution cabinet, a manually-propelled breaker isolation body trolley is adopted, the breaker isolation body trolley is arranged on a track on a bottom plate in the high-voltage power distribution cabinet, a manual driving link mechanism is arranged in a box body on the right side of the breaker isolation body trolley, an operator drives the breaker isolation body trolley to be propelled and pulled out through the manual operation link mechanism so as to realize the connection and disconnection of a moving contact and a static contact seat, the mode needs manual field implementation operation, cannot realize remote control or ground remote control, cannot meet the requirement of modern mine management, and how to realize the remote operation of a ground control room on the underground breaker isolation body is a technical problem needing to be solved on site.

Because the load of a breaker isolation body trolley in a high-voltage power distribution cabinet under a coal mine is large, an operated manual link mechanism is arranged on the side surface of a trolley body, the phenomenon of deviation and clamping stagnation of the breaker isolation body trolley frequently occurs in the process of propelling the trolley through the manual link mechanism, so that the connection and disconnection of a movable contact and a static contact seat cannot be normally carried out, the trolley can stably and smoothly move along a traveling track when the propelling force of the trolley is implemented, the defect that the trolley is easy to deviate in the propelling process is overcome, and the technical problem which needs to be solved urgently on site is solved; in addition, the aim of pushing the breaker isolation body trolley is to complete the connection between the movable contact and the static contact seat, the insertion between the movable contact and the static contact seat is required to be in place, the manual operation of the existing manual operation through a manual driving link mechanism needs to be carried out by means of auxiliary equipment, the in-place insertion between the movable contact and the static contact seat is observed and judged in the field, the phenomenon of judgment errors often occurs, and the normal work of the breaker is influenced; how to control the plugging of the moving contact and the static contact seat in place on the stroke of the control trolley is also a technical problem which is always explored by field technicians.

When the on-site is overhauled the circuit breaker isolation body, need deviate from the circuit breaker isolation body dolly outside the cabinet from the work track, in order to conveniently maintain and overhaul the equipment on the dolly, overhaul the completion back, when pushing back the circuit breaker isolation body dolly again on the work track, need carry out the work track location of circuit breaker isolation body dolly again in the operation, and be connected circuit breaker isolation body dolly and manual drive link mechanism once more, there is the loaded down with trivial details and the inefficiency problem of location and connection work, how to realize circuit breaker isolation body dolly and overhaul the convenient operation of accomplishing the work track of returning again, also be another problem that the on-site needs to solve.

Disclosure of Invention

The invention provides a convenient-to-overhaul touch connection type breaker isolation body trolley, which solves the technical problem of how to realize convenient operation of completing the re-returning of a working track during overhaul of the breaker isolation body trolley.

The invention solves the technical problems by the following technical scheme:

a manual-automatic integrated type propelled breaker isolation body in a mining high-voltage power distribution cabinet comprises a high-voltage power distribution cabinet shell, wherein a middle partition plate is arranged in the high-voltage power distribution cabinet shell, a fixed contact seat is arranged on the middle partition plate, a breaker isolation body trolley propulsion track is arranged on a high-voltage power distribution cabinet middle bottom plate on the right side of the middle partition plate, a breaker isolation body trolley is arranged on the breaker isolation body trolley propulsion track, a breaker isolation body is arranged on the breaker isolation body trolley, a moving contact is arranged on the breaker isolation body, an actuating mechanism bottom plate is fixedly arranged on the high-voltage power distribution cabinet middle bottom plate between the two breaker isolation body trolley propulsion tracks below the breaker isolation body trolley, a pair of lead screw supporting seats are arranged on the actuating mechanism bottom plate, a lead screw is arranged on the pair of lead screw supporting seats, and a lead screw, the lead screw nut block is connected with the circuit breaker isolation body trolley together, a worm gear mechanism is connected to the input end of a lead screw, a motor rotor center shaft of a motor is connected to the input shaft of the worm gear mechanism, a driven sprocket is connected to the other end of the motor rotor center shaft, a driving sprocket is arranged on the side wall of a high-voltage distribution cabinet shell, an annular driving chain is arranged between the driving sprocket and the driven sprocket, and the motor is electrically connected with a remote central control room electric controller together.

A worm gear input end coupler is connected between the left shaft end of the motor rotor central shaft and an input end shaft of the worm gear mechanism, a worm gear output end coupler is connected between an output end shaft of the worm gear mechanism and an input end of the screw rod, a transition shaft is connected to the other end of the motor rotor central shaft, and a driven sprocket is arranged on the transition shaft.

A manual-automatic integrated propelled circuit breaker isolation body driving mechanism comprises a circuit breaker isolation body trolley, an actuating mechanism bottom plate, a high-voltage distribution cabinet shell side wall, a motor, a lead screw, a driven sprocket and a driving sprocket, wherein the driving sprocket is arranged on the high-voltage distribution cabinet shell side wall, a pair of lead screw supporting seats are arranged on the actuating mechanism bottom plate, the lead screw is arranged on the pair of lead screw supporting seats, a lead screw nut block is arranged on the lead screw, a motor rotor central shaft is arranged in the motor, the lead screw and the motor rotor central shaft are arranged in an L-shaped mode, a trolley driving tongue block is arranged on the bottom end face of a trolley plate of the circuit breaker isolation body trolley, the trolley driving tongue block is movably abutted against the upper end of the lead screw nut block, a worm gear input end coupling is connected between the left shaft end of the motor rotor central shaft and an input end shaft of, the electric control system is characterized in that a worm gear output end coupling is connected between an output end shaft of the worm gear mechanism and an input end of the lead screw, a transition shaft is connected to the other end of a central shaft of the motor rotor, a driven sprocket is arranged on the transition shaft, an annular driving chain is arranged between the driving sprocket and the driven sprocket, and the motor is electrically connected with an electric controller of a remote central control room.

The manual shaft hole is formed in the side wall of the high-voltage distribution cabinet shell, the manual shaft sleeve is arranged in the manual shaft hole, the manual shaft is movably arranged in the manual shaft sleeve, the driving chain wheel is arranged at the shaft end of the manual shaft extending into the high-voltage distribution cabinet shell, and the crank is connected to the shaft end of the manual shaft arranged outside the high-voltage distribution cabinet shell.

A collision connection type circuit breaker isolation body trolley convenient to overhaul comprises a circuit breaker isolation body trolley body underframe, a trolley body underframe plate is arranged on the circuit breaker isolation body trolley body underframe, a U-shaped notch is arranged at the center of the front end side face of the trolley body underframe plate, a trolley driving tongue lifting guide rail block is fixedly arranged on the trolley body underframe plate above the U-shaped notch, a trolley driving tongue lifting guide rail groove is arranged on the rear vertical face of the trolley driving tongue lifting guide rail block, a trolley driving tongue block is movably arranged in the trolley driving tongue lifting guide rail groove, a pressure spring limiting plate connecting screw hole is arranged at the top end of the trolley driving tongue lifting guide rail block, a deflector rod arranged along the vertical direction up and down is arranged on the trolley driving tongue lifting guide rail block and penetrates through a strip-shaped through hole, and the deflector rod penetrates through the strip-shaped through hole to be communicated with the trolley driving tongue lifting, a U-shaped block is fixedly connected on the front vertical face of the trolley driving tongue lifting guide rail block, the U-shaped groove of the U-shaped block is communicated with a deflector rod through a long through hole, a rear pin shaft and a front pin shaft are respectively arranged in the U-shaped groove of the U-shaped block, a pressure spring mounting counter bore is arranged on the top end face of the trolley driving tongue block, an inclined plane is arranged at the bottom end of the rear vertical face of the trolley driving tongue block, a driving tongue block lifting deflector hole is arranged at the center of the trolley driving tongue block, a short deflector rod is movably arranged in the long through hole in the way that the deflector rod penetrates through the long through hole, a pin shaft in the left and right direction penetrates through the long through hole on the short deflector rod, a pin shaft on the short deflector rod penetrates through the long through hole, the rear end of the short deflector rod is movably inserted in the driving tongue block lifting deflector hole on the trolley driving tongue block, a long, the rear end of the long deflector rod is hinged with the front end of the short deflector rod through a connecting pin; and a pressure spring limiting plate is connected to the pressure spring limiting plate connecting screw hole, and a pressure spring is arranged between the pressure spring limiting plate and the pressure spring mounting counter bore.

The U-shaped block is respectively provided with a rear pin shaft through hole and a front pin shaft through hole, the rear pin shaft is movably connected in the rear pin shaft through hole, the front pin shaft is movably connected in the front pin shaft through hole, a cover plate is connected on the rear vertical surface of the trolley driving tongue lifting guide rail block, and the trolley driving tongue lifting guide rail block is connected on a trolley body underframe plate through a fixing bolt; the bottom that the driving lever passed rectangular through-hole is provided with short driving lever spacing step.

The invention provides a support on a mechanical structure for ground remote control of the circuit breaker isolation body, realizes remote on-off operation of the circuit breaker by electrically controlling the motor, realizes dual purposes of electric control and manual control on the mechanical structure, can simultaneously complete on-site manual control operation by the electrically controlled mechanical mechanism, realizes electric and manual compatibility, can quickly lock and separate the whole trolley isolation from the propulsion mechanism, and is convenient to operate.

Drawings

Fig. 1 is a schematic structural view of a trolley of a trip-connect circuit breaker isolating body of the present invention;

FIG. 2 is a schematic structural view of the trolley driving tongue lifting guide rail block 2 of the present invention;

fig. 3 is a schematic structural view of the manual operating mechanism of the breaker isolation body trolley and the breaker isolation body driving mechanism of the invention;

FIG. 4 is a schematic view of the construction of the trolley drive tongue 12 of the present invention;

fig. 5 is a schematic structural view of a high voltage distribution cabinet according to the present invention;

fig. 6 is a schematic structural view of the circuit breaker isolating body trolley 1 of the invention;

figure 7 is a schematic structural view of the circuit breaker isolating body drive mechanism of the present invention in a front view;

fig. 8 is a schematic structural view of the circuit breaker isolating body driving mechanism in a top view of the present invention.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings:

a manual-automatic integrated type propelled breaker isolation body in a mining high-voltage power distribution cabinet comprises a high-voltage power distribution cabinet shell 45, a middle partition plate 46 is arranged in the high-voltage power distribution cabinet shell 45, a static contact seat 47 is arranged on the middle partition plate 46, a breaker isolation body trolley propulsion track 26 is arranged on a high-voltage power distribution cabinet middle bottom plate on the right side of the middle partition plate 46, a breaker isolation body trolley 1 is arranged on the breaker isolation body trolley propulsion track 26, a breaker isolation body 24 is arranged on the breaker isolation body trolley 1, a movable contact 25 is arranged on the breaker isolation body 24, an execution mechanism bottom plate 29 is fixedly arranged on the high-voltage power distribution cabinet middle bottom plate between the two breaker isolation body trolley propulsion tracks 26 below the breaker isolation body trolley 1, a pair of lead screw supporting seats 28 is arranged on the execution mechanism bottom plate 29, and a lead screw 27 is arranged on the, a lead screw nut block 30 is arranged on a lead screw 27, the lead screw nut block 30 is connected with a breaker isolation body trolley 1, a worm and gear mechanism 31 is connected on the input end of the lead screw 27, a motor rotor central shaft 35 of a motor 34 is connected on an input shaft of the worm and gear mechanism 31, a driven sprocket 37 is connected at the other end of the motor rotor central shaft 35, a driving sprocket 39 is arranged on a side wall 40 of a high-voltage distribution cabinet shell 45, an annular driving chain 38 is arranged between the driving sprocket 39 and the driven sprocket 37, and the motor 34 is electrically connected with a remote central control room electric controller; the control cabinet provided with the motor 34 can realize remote control of the propelling action of the breaker isolation body trolley 1 in the casing 45 of the underground high-voltage power distribution cabinet on the ground, and as the screw has the process accuracy and the self-locking function, the actuating mechanism of the motor and the screw greatly improves the accurate control of the disconnection and the in-place insertion of the moving contact and the fixed contact, and thoroughly solves the defect that the manual operation is easy to fail in the prior art; meanwhile, due to the special requirements of underground operation, the electric actuating mechanism has the function of manual operation, so that the working reliability of the equipment is greatly improved, and the requirements of the underground special operation are met.

A worm gear input end coupling 32 is connected between the left shaft end of the motor rotor central shaft 35 and the input end shaft of the worm gear mechanism 31, a worm gear output end coupling 33 is connected between the output end shaft of the worm gear mechanism 31 and the input end of the screw 27, a transition shaft 36 is connected to the other end of the motor rotor central shaft 35, and a driven sprocket 37 is arranged on the transition shaft 36; when the actuator is in the electric control state, the driven chain wheel 37 and the driving chain wheel 39 are in the following state; in an emergency or when the electric control system has a fault, the driving chain wheel 39 can be manually controlled to rotate to realize the opening and closing of the circuit breaker.

A manual-automatic integrated propelled circuit breaker isolation body driving mechanism comprises a circuit breaker isolation body trolley 1, an execution mechanism bottom plate 29, a high-voltage distribution cabinet shell side wall 40, a motor 34, a lead screw 27, a driven sprocket 37 and a driving sprocket 39, wherein the high-voltage distribution cabinet shell side wall 40 is provided with the driving sprocket 39, the execution mechanism bottom plate 29 is provided with a pair of lead screw supporting seats 28, the lead screw 27 is arranged on the pair of lead screw supporting seats 28, the lead screw 27 is provided with a lead screw nut block 30, the motor 34 is provided with a motor rotor central shaft 35, the lead screw 27 and the motor rotor central shaft 35 are arranged in an L shape, a trolley driving tongue block 12 is arranged on the bottom end face of a trolley plate of the circuit breaker isolation body trolley 1, the trolley driving tongue block 12 is movably connected with the upper end of the lead screw nut block 30 in a leaning manner, a worm gear input end coupling 32 is connected between the left shaft end of the motor rotor central shaft 35 and an input end shaft, a worm gear output end coupling 33 is connected between an output end shaft of the worm gear mechanism 31 and an input end of the lead screw 27, a transition shaft 36 is connected at the other end of a motor rotor central shaft 35, a driven chain wheel 37 is arranged on the transition shaft 36, an annular driving chain 38 is arranged between a driving chain wheel 39 and the driven chain wheel 37, and the motor 34 is electrically connected with a remote central control room electric controller; the adoption of the worm gear mechanism 31 realizes the 90-degree direction change of the driving force, so that the structure of the actuating mechanism is more compact, and the arrangement of the electric mechanism, the manual mechanism and the trolley in the box is in a U-shaped arrangement form, thereby greatly saving the space and being particularly suitable for the reconstruction of the existing cabinet body.

A manual shaft hole 41 is formed in the side wall 40 of the high-voltage distribution cabinet shell, a manual shaft sleeve 42 is arranged in the manual shaft hole 41, a manual shaft 43 is movably arranged in the manual shaft sleeve 42, a driving sprocket 39 is arranged at the shaft end of the manual shaft 43 extending into the high-voltage distribution cabinet shell 45, and a crank 44 is connected to the shaft end of the manual shaft 43 arranged outside the high-voltage distribution cabinet shell 45; the trolley can be pushed in by manually shaking the crank handle 44 on site.

A convenient-to-overhaul bump-connected circuit breaker isolation body trolley comprises a circuit breaker isolation body trolley body underframe, a trolley body underframe plate is arranged on the circuit breaker isolation body trolley body underframe, a U-shaped notch is arranged at the center of the front end side face of the trolley body underframe plate, a trolley driving tongue lifting guide rail block 2 is fixedly arranged on the trolley body underframe plate above the U-shaped notch, a trolley driving tongue lifting guide rail groove 3 is arranged on the rear vertical face of the trolley driving tongue lifting guide rail block 2, a trolley driving tongue block 12 is movably arranged in the trolley driving tongue lifting guide rail groove 3, a pressure spring limiting plate connecting screw hole 9 is arranged at the top end of the trolley driving tongue lifting guide rail block 2, a deflector rod arranged in the vertical direction up and down is arranged on the trolley driving tongue lifting guide rail block 2 and penetrates through a strip-shaped through hole 4, the deflector rod penetrates through the strip-shaped through hole 4 and is communicated with the trolley driving tongue lifting, a U-shaped block 6 is fixedly connected on the front vertical face of the trolley driving tongue lifting guide rail block 2, the U-shaped groove of the U-shaped block 6 is communicated with a deflector rod through a strip through hole 4, a rear pin shaft 19 and a front pin shaft 20 are respectively arranged in the U-shaped groove of the U-shaped block 6, a pressure spring installation counter bore 15 is arranged on the top end face of the trolley driving tongue block 12, an inclined plane 13 is arranged at the bottom end of the rear vertical face of the trolley driving tongue block 12, a driving tongue block lifting deflector hole 14 is arranged at the center of the trolley driving tongue block 12, a short deflector rod 17 is movably arranged in the long through hole 4 after the deflector rod passes through, a pin shaft in the left and right direction passes through the long through hole 18 is arranged on the short deflector rod 17, the rear pin shaft 19 is penetrated in the long through hole 18, the rear end of the short deflector rod 17 is movably inserted in the driving tongue block lifting deflector hole 14 on the trolley driving tongue block 12, a long, the rear part of the long driving lever 22 is hinged with the front pin shaft 20, and the rear end of the long driving lever 22 is hinged with the front end of the short driving lever 17 through a connecting pin 21; a pressure spring limiting plate 11 is connected to the pressure spring limiting plate connecting screw hole 9, and a pressure spring 16 is arranged between the pressure spring limiting plate 11 and the pressure spring mounting counter bore 15.

A rear pin shaft through hole 7 and a front pin shaft through hole 8 are respectively arranged on the U-shaped block 6, a rear pin shaft 19 is movably connected in the rear pin shaft through hole 7, a front pin shaft 20 is movably connected in the front pin shaft through hole 8, a cover plate 23 is connected on the rear vertical surface of the trolley driving tongue lifting guide rail block 2, and the trolley driving tongue lifting guide rail block 2 is connected on a trolley body bottom frame plate through a fixing bolt 10; the bottom of the shifting lever passing through the strip through hole 4 is provided with a short shifting lever limiting step 5.

When the circuit breaker isolation body trolley 1 enters a working track, namely, when two circuit breaker isolation body trolleys are pushed into the track 26, the trolley driving tongue block 12 extends downwards under the action of the pressure spring 16 and is abutted with the upper side of the rear end face of the lead screw nut block 30 on the lead screw 27, the lead screw 27 rotates under the driving of the motor 34, the lead screw nut block 30 moves backwards, so that the circuit breaker isolation body trolley 1 is driven to push backwards, reliable in-place insertion of moving and static contacts is realized by controlling the rotating stroke of the lead screw 27, as the trolley driving tongue block 12 is movably abutted with the lead screw nut block 30, the flexible starting of the trolley is realized, and meanwhile, as the lead screw 27 is arranged on the central axis of the circuit breaker isolation body trolley 1, the driving force of the driving trolley is flexible and balanced, and the defect that the trolley is easy to deviate is overcome; when the motor 34 rotates in the reverse direction, the rear end face of the lead screw nut block 30 is abutted against the rear side face of the trolley body bottom frame plate of the breaker isolation body trolley 1, and the lead screw nut block 30 moves forward to drive the breaker isolation body trolley 1 to move forward, so that the separation of the moving and static contacts of the breaker is realized.

When equipment on the breaker isolation body trolley 1 needs to be overhauled, the front side end of the long deflector rod 22 is lifted, the rear end of the short deflector rod 17 is lifted upwards, the rear end of the short deflector rod 17 lifts the trolley driving tongue block 12 upwards through the driving tongue block lifting deflector hole 14, the trolley driving tongue block 12 retracts into the trolley driving tongue lifting guide rail groove 3, the limiting of the screw nut block 30 on the trolley driving tongue block 12 is relieved, the breaker isolation body trolley 1 is pulled out of the high-voltage power distribution cabinet shell 45, the equipment is overhauled, after the breaker isolation body trolley 1 is pulled out, the front side end of the long deflector rod 22 is put down, the trolley driving tongue block 12 returns to the position where the lower end extends out of the trolley driving tongue lifting guide rail groove 3 under the action of self weight, and because of the arrangement of the short deflector rod limiting step 5, the short deflector rod 17 can only return to the horizontal state, the deadweights of the two shift levers are balanced with the elasticity of the pressure spring 16; after the maintenance is completed, the breaker isolation body trolley 1 is pushed inwards towards the high-voltage power distribution cabinet shell 45, and after the inclined plane 13 arranged at the bottom end of the rear vertical surface on the trolley driving tongue block 12 is in contact with the screw nut block 30, the trolley retracts automatically, so that the breaker isolation body trolley 1 enters the working track.