CN115733084A - Centrally-mounted switch cabinet, transfer trolley and handcart transfer method - Google Patents

Abstract

The invention discloses a centrally-mounted switch cabinet, a transfer trolley and a handcart transfer method.A partition plate in a cabinet body is provided with a guide hole and a first nut, a guide sleeve, a limiting column, an L-shaped support plate, a sliding block and a spring are arranged below the partition plate, and the sliding block is in contact with the inclined plane of a guide shaft; the transfer trolley comprises a guide shaft, a front nut, a rear nut, a transfer trolley rocker, a turbine box, a rack and the like, wherein the rocker can be in threaded connection with the first nut, a worm section of the rocker is meshed with a worm wheel to drive the rack to lift, and the rocker is matched with a spring to push the limiting column to lift. The invention can realize the interlocking firm connection between the centrally-mounted switch cabinet and the transfer trolley and the safe transfer of the handcart, and prevent the occurrence of unhooking or tipping accidents.

Description

Centrally-mounted switch cabinet, transfer trolley and handcart transfer method

Technical Field

The invention particularly relates to a centrally-mounted switch cabinet, a transfer trolley and a handcart transfer method, and belongs to the technical field of high-voltage distribution devices.

Background

The fully-known armored mid-set withdrawable metal-enclosed switchgear of a mid-set switch cabinet belongs to a three-phase alternating-current indoor complete high-voltage distribution device, the working voltage is usually 10-35kV, and the device is used for receiving and distributing electric energy and controlling, protecting, monitoring and measuring a power circuit. The circuit breaker is arranged in the middle layer of the cabinet body, so the circuit breaker is also referred to as a middle cabinet. The circuit breaker is usually placed on a chassis vehicle, and the circuit breaker and the chassis vehicle jointly form a circuit breaker handcart, also called the handcart for short.

The transfer trolley is used as an important matched accessory of the centrally-mounted switch cabinet, and has the main function of safely moving out a circuit breaker handcart from the interior of the switch cabinet and conveying the circuit breaker handcart to other positions when the switch cabinet is installed, debugged, operated and overhauled; and when the switch cabinet is installed, debugged or overhauled, the circuit breaker handcart needs to be moved into the switch cabinet. The current common circuit breaker such as a vacuum circuit breaker or a sulfur hexafluoride circuit breaker has the weight of about 200kg and is eccentric to the tulip contact, and the chassis vehicle has the weight of about 40kg, so that the overall weight of the handcart is large, and the shape of the handcart is thin and high. The existing transfer trolley is simple in structure, is connected with a switch cabinet only through a simple hand-pulling type hook, is not firm in connection and is easy to be mistakenly knocked to unhook, once the transfer trolley is unhooked to lose connection with the switch cabinet, the transfer trolley can be shifted, a large gap is generated between the transfer trolley and the switch cabinet, a circuit breaker can fall due to the fact that the weight of the circuit breaker is eccentric, overturning accidents are caused, equipment is damaged if the circuit breaker is light, and personnel are injured if the circuit breaker is heavy. In practice, many accidents have occurred, particularly during the pulling of the hand truck out of the switchgear cabinet, due to the uncoupling of the trolley from the switchgear cabinet.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an interlocking type centrally installed switchgear, a transfer trolley and a handcart transfer method, so that the interlocking firm connection between the centrally installed switchgear and the transfer trolley and the safe transfer of a handcart are realized, and the unhooking or tipping accidents are prevented.

The technical scheme of the invention is as follows:

the utility model provides a centrally installed switchgear, the fixed median septum that is provided with of middle part level of the cabinet body, be provided with first guide rail in the both sides of median septum, placed the handcart on first guide rail, the handcart includes chassis car and circuit breaker, is provided with handcart rocker, its characterized in that on the chassis car: the outer side of the middle partition plate is vertically bent downwards to form a first bending part, guide holes are symmetrically formed in two sides of the first bending part, a first through hole is formed in the center of the first bending part, a first nut is fixedly arranged on the inner side of the first bending part, and the first nut is coaxial with the first through hole; a second through hole is formed in the plane of the middle partition plate and close to the first bending part, a guide sleeve is fixedly arranged below the middle partition plate and is coaxial with the second through hole, a limiting column is movably arranged in the guide sleeve, and the lower surface of the limiting column is a first inclined surface; the lower part of the middle partition board is close to the first bending part and is fixedly provided with an L-shaped support plate, an upward convex sliding rail is arranged at the center of the bottom surface of the L-shaped support plate, a sliding block is arranged on the sliding rail in a matched mode, one side of the sliding block is abutted against a first nut, the other side of the sliding block is connected with the vertical surface of the L-shaped support plate through a spring, a second inclined surface and a third inclined surface are arranged on the sliding block, one side, close to the direction of the first nut, of the second inclined surface is lower than one side, close to the direction of the spring, of the second inclined surface of the sliding block, and the first inclined surface of the limiting column is in parallel contact with the second inclined surface of the sliding block.

Furthermore, a transfer trolley is matched with the cabinet body and comprises a horizontally arranged support plate, second guide rails are fixedly arranged on two sides of the support plate, the front side and the rear side of the support plate are vertically and downwards bent into a front bending part and a rear bending part, guide shafts are symmetrically arranged on two sides of the front bending part, and the guide shafts are matched with the guide holes and correspondingly arranged; the inner sides of the middle parts of the front bending part and the rear bending part are respectively and fixedly provided with a front nut and a rear nut, the middle parts of the front bending part and the rear bending part are penetrated with a transfer trolley rocker, the front end and the rear end of the transfer trolley rocker are respectively provided with a threaded section, namely a front threaded section and a rear threaded section, and the front threaded section and the rear threaded section of the transfer trolley rocker are respectively connected with the front nut and the rear nut in a matched manner through threads; when the guide shaft and the guide hole are aligned along the axial direction, the front nut and the first nut are also aligned along the axial direction, and the specification and the model of the front nut are the same as those of the first nut.

Further, a turbine box is fixedly arranged below the supporting plate of the transfer trolley and close to one side of the front bending part, a worm wheel is arranged in the turbine box, a rotating shaft is fixedly arranged at the center of the worm wheel, and a gear is coaxially and fixedly connected to the rotating shaft; a worm section is arranged at one side of the middle part of the transfer trolley rocker close to the front bending part, the transfer trolley rocker penetrates through the turbine box, and the worm section is meshed with the worm wheel in a matching way; a rack seat is vertically and fixedly arranged below the supporting plate, a rack is slidably arranged on the rack seat, the rack is meshed with the gear, and the rack can penetrate in or out of the supporting plate.

Furthermore, two ends of the rear thread section of the transfer trolley rocker are respectively provided with a limiting pin, and the limiting pins penetrate through the rod body of the transfer trolley rocker.

Furthermore, the tail end of the transfer trolley rocker is provided with a swinging head, the swinging head of the transfer trolley rocker is consistent with the swinging head of the handcart rocker in shape, and the transfer trolley rocker and the handcart rocker can share one crank.

A handcart transferring method comprises the following steps that when a handcart needs to be taken out of a built-in switch cabinet:

firstly, mounting a crank on a rocker of a handcart, rotating the crank to shake a circuit breaker to a maintenance position, and taking down the crank;

secondly, opening a cabinet door of a breaker chamber of the middle-placed switch cabinet, moving the transfer trolley to the position right ahead of the switch cabinet, adjusting the height of a support plate of the transfer trolley, horizontally inserting two guide shafts of the transfer trolley into guide holes of a partition plate in the cabinet body, enabling a front bending part of the transfer trolley to be abutted and attached to a first bending part of the cabinet body, and enabling a second guide rail of the transfer trolley to be abutted and connected with a first guide rail of the cabinet body;

thirdly, mounting a crank on a transfer trolley rocker, rotating the transfer trolley rocker to enable the transfer trolley rocker to advance to penetrate through a first through hole of a partition plate in the cabinet body and be fixedly connected with a first nut in a matched mode through threads; the crank is continuously rotated, so that the head of the rocker of the transfer trolley penetrates out of the first nut and extrudes the sliding block to move backwards along the sliding rail, the spring is compressed, meanwhile, the limiting column matched with the second inclined plane of the sliding block descends, and the limiting column does not block the handcart from being pulled out; when the rocker of the transfer trolley rotates, the worm section drives the worm wheel to rotate, the worm wheel drives the rotating shaft and the gear to rotate, the gear drives the rack to descend, and the rack does not block the handcart from entering the transfer trolley;

fourthly, pulling the handcart to enable the handcart to enter a second guide rail of the transfer trolley along the first guide rail of the cabinet body, reversely rotating the crank handle after the handcart is completely transferred onto the transfer trolley, enabling the rocker of the transfer trolley to reversely rotate and retreat, and pushing the sliding block to move by the spring after the rocker of the transfer trolley is separated from the first nut, and pushing the limiting column to ascend and protrude to the surface of the partition plate in the cabinet body by the sliding block; when the rocker of the transfer trolley rotates reversely, the worm section drives the worm wheel to rotate, the worm wheel drives the rotating shaft and the gear to rotate, the gear drives the rack to ascend, and the rack protrudes out of the upper surface of the support plate of the transfer trolley to play a role in stopping the handcart from retreating; and finally, pushing the transfer trolley to drive the handcart to move forwards from the switch cabinet integrally.

Has the advantages that: the middle partition plate of the centrally-mounted switch cabinet is provided with the first nut, the sliding block, the spring, the limiting column and other components, the transfer trolley is provided with the transfer trolley rocker, and the transfer trolley rocker can be in threaded connection with the first nut, so that the transfer trolley and the switch cabinet can be reliably locked and fixedly connected, and accidental disengagement is prevented; meanwhile, the inclined plane between the limiting column and the sliding block is matched to drive the limiting column to lift, so as to indicate whether the rocker of the transfer trolley is locked in place; meanwhile, a worm structure is arranged in the middle of a rocker of the transfer trolley, the worm gear and worm matching and the gear and rack matching are utilized to drive the rack to lift, when the transfer trolley is not provided with a trolley, if the rack protrudes out of the upper surface of a support plate of the transfer trolley, the reliable connection between the transfer trolley and the switch cabinet is not formed, and the carrying condition is not met; when the handcart is carried on the transfer trolley, the rack protrudes out of the upper surface of the support plate of the transfer trolley, and the function of stopping the handcart from retreating is also achieved. Therefore, the invention realizes the firm connection and interlocking between the centrally-mounted switch cabinet and the transfer trolley, is beneficial to the safe transfer of the handcart and prevents the unhooking or tipping accidents.

Drawings

Fig. 1 is a schematic perspective view of a centrally installed switchgear.

Fig. 2 is a schematic view of the switchgear cabinet of fig. 1 with the breaker chamber door hidden.

Fig. 3 is an enlarged view of region a in fig. 2.

Fig. 4 is a schematic diagram of the transfer trolley and the switch cabinet.

Fig. 5 is a schematic view of a partition in a switchgear cabinet.

Fig. 6 is a front view of fig. 5.

Fig. 7 is a sectional view taken along line B-B in fig. 6.

Fig. 8 is an enlarged view of region C in fig. 7.

Fig. 9 is a schematic view of the slider and the limiting post.

Fig. 10 is a schematic perspective view of the transfer cart.

Fig. 11 is a left side view of fig. 10.

Fig. 12 is a cross-sectional view taken along line D-D of fig. 11.

Fig. 13 is a cross-sectional view taken along line E-E of fig. 11.

Fig. 14 is a schematic view of the combination of the rocker arm, the turbine box, the gear and the rack of the transfer trolley.

The labels in the figure are: 1, a cabinet body, 11 bus and instrument rooms, 12 breaker rooms, 13 cable rooms, 14 middle partitions, 15 first guide rails, 16 chassis and 17 breakers; 140 guide sleeves, 141 first bending parts, 142 guide holes, 143 first through holes, 144 second through holes, 145 limit columns, 146L-shaped support plates, 147 sliders, 148 springs, 149 first nuts, 161 handcart rockers, 162 handles, 1451 first inclined planes, 1461 slide rails, 1471 second inclined planes, 1472 third inclined planes and 1473 slide grooves;

2 a transfer trolley, 21 an underframe, 22 castors, 23 a screw rod, 24 a hand wheel, 25 a supporting plate, 26 a transfer trolley rocker, 27 a second guide rail, 28 a turbine box, 251 a back bending part, 252 a front bending part, 253 a guide shaft, 254 a limiting block, 261 a worm rod section, 262 a front thread section, 263 a back thread section, 264 a swinging head, 265 a limiting pin, 271 a limiting hole, 281 a worm wheel, 282 a rotating shaft, 283 a gear, 284 a rack, 285 a rack seat, 2511 a back nut and 2521 a front nut.

Detailed Description

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings, wherein all directional indicators (such as up, down, left, right, front, rear \8230;) are used only for explaining the relative positional relationship between the components in a specific posture, the motion situation, etc., and if the specific posture is changed, the directional indicator is changed accordingly. It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

As shown in fig. 1-4, a main structure of a central switch cabinet body 1 is mainly divided into three layers, an upper layer is a bus and an instrument room (isolated from each other) 11, a middle layer is a circuit breaker room 12, and a lower layer is a cable room 13. Fixed well baffle 14 that is provided with of middle part level at cabinet body 1, all be provided with first guide rail 15 in the both sides of well baffle 14, placed the handcart on first guide rail 15, the handcart includes chassis car 16 and circuit breaker 17, and the handcart is located circuit breaker room 12 promptly. Two handles 162 are arranged on the chassis 16, and the handles can move left and right in a small range so as to be conveniently clamped with or separated from the first guide rail; a handcart rocker 161 is arranged between the two handles, and the handcart rocker 161 is rocked by the crank to realize the movement of the circuit breaker 17 relative to the chassis 16, so that the circuit breaker is positioned at different positions of maintenance, test, work and the like. When the circuit breaker is in the maintenance position, the handcart can be integrally pulled out from the middle cabinet by pulling the handle 162 on the chassis vehicle and placed on the transfer vehicle 2 matched with the switch cabinet, so that the circuit breaker is conveniently maintained.

The structure of the transfer trolley 2 matched with the switch cabinet body 1 is shown in fig. 10-13, the transfer trolley 2 comprises a bottom frame 21, the bottom frame 21 is in a box body structure, and four trundles 22 are arranged below the bottom frame 21 to facilitate the movement of the transfer trolley. Four hand wheels 24 are arranged above the underframe 21, a vertical screw rod 23 is arranged through each hand wheel 24, a horizontally arranged support plate 25 is fixedly connected above the screw rod 23, and the level and the height of the support plate 25 can be adjusted by rotating the hand wheels 24. The second guide rails 27 are fixedly arranged on two sides of the supporting plate 25, one end of each second guide rail 27 is provided with a limiting hole 271 so as to be conveniently connected with a handle of a handcart in a clamping mode, meanwhile, a limiting block 254 is fixedly arranged on the supporting plate at the rear end of each second guide rail, and the limiting block can prevent the handcart from excessively moving when the handcart is transferred, so that the handcart is prevented from falling.

The front and rear sides of the transfer trolley support plate 25 are vertically and downwards bent into a front bent part 252 and a rear bent part 251, guide shafts 253 are symmetrically arranged on the two sides of the front bent part 252, a front nut 2521 and a rear nut 2511 are fixedly arranged on the inner sides of the middle parts of the front bent part 252 and the rear bent part 251 respectively, and the specification and model of the front nut and the rear nut are the same. A horizontally arranged transfer trolley rocker 26 is arranged in the middle of the front bending part and the rear bending part in a penetrating manner, a worm section 261 is arranged in the middle of the transfer trolley rocker 26 close to one side of the front bending part, threaded sections, namely a front threaded section 262 and a rear threaded section 263, are arranged at the front end and the rear end of the transfer trolley rocker 26, and the front threaded section 262 and the rear threaded section 263 of the transfer trolley rocker are respectively connected with a front nut 2521 and a rear nut 2511 in a matched manner through threads; the tail end of the transfer trolley rocker 26 is provided with a swinging head 264, the swinging head 264 is positioned at the outer side of the back bending part, the swinging head of the transfer trolley rocker is consistent with the swinging head shape of the handcart rocker, and the swinging head and the handcart rocker can share one crank, so that the fittings are saved, and the confusion caused by too much cranks is prevented. And two ends of the rear threaded section 263 of the transfer trolley rocker are respectively provided with a limit pin 265, and the limit pins 265 penetrate through the rod body of the transfer trolley rocker. The two limit pins 265 play a role in limiting the axial movement stroke of the rocker, and prevent the rocker from being separated from the front bending part and/or the rear bending part due to excessive rotation. The crank is inserted into the rocker head of the transfer trolley, the rocker is driven to rotate by rotating the crank, and the rocker generates axial displacement while rotating because the front nut and the rear nut are fixed.

A turbine box 28 is fixedly arranged below the supporting plate 25 of the transfer trolley and close to one side of the front bending part, see fig. 11-14, a worm wheel 281 is arranged in the turbine box 28, the rocker 26 of the transfer trolley penetrates through the turbine box 28, and a worm section 261 on the rocker is matched and meshed with the worm wheel 281; a rotating shaft 282 is fixedly arranged at the center of the worm wheel, and a gear 283 is coaxially and fixedly connected to the rotating shaft 282; a rack seat 285 is also vertically and fixedly arranged below the support plate 25, a rack 284 is mounted on the rack seat 285 in a sliding and clamping manner, the rack 284 is meshed with the gear 283, the rack 284 can slide up and down along the rack seat 285 under the driving of the gear 283, and the rack 284 can penetrate into or out of the support plate 25. Only one set of gear and rack structure is shown in fig. 10-14, if two ends of the rotating shaft 282 passing through the worm gear are respectively connected with a gear, and each gear drives a rack, then synchronous lifting of two sets of racks can be realized, which is the same as the lifting principle of one rack and is not described again.

In order to ensure that the transfer trolley 2 can be reliably and fixedly connected with the cabinet body 1, the cabinet body 1 needs to be specially designed. As shown in fig. 5-9, the outer side of the middle partition 14 is vertically bent downward to form a first bent portion 141, a pair of guide holes 142 are symmetrically arranged at two sides of the first bent portion 141, a first through hole 143 is arranged at the center of the first bent portion, a first nut 149 is fixedly arranged at the inner side of the first bent portion, the first nut 149 is coaxial with the first through hole 143, the first nut 149 has the same specification and model with a front nut 2521 on the trolley, and the guide holes 142 are correspondingly matched with a guide shaft 253 on the trolley, when two guide shafts 253 of the trolley are axially aligned with the two guide holes 142 of the cabinet body, the rocker 26 and the front nut 2521 of the trolley are also axially aligned with the first nut 149 of the cabinet body, so that the trolley 2 can be conveniently butted with the cabinet body 1.

A second through hole 144 is arranged on the upper plane of the middle partition 14 close to the first bending part 141, a guide sleeve 140 is fixedly arranged below the middle partition 14, the guide sleeve 140 is coaxially communicated with the second through hole 144, a limiting column 145 is movably arranged in the guide sleeve 140, and the lower surface of the limiting column 145 is a first inclined surface 1451; an L-shaped support plate 146 is fixedly arranged below the middle partition plate and close to the first bending part, a sliding rail 1461 protruding upwards is arranged at the center of the bottom surface of the L-shaped support plate 146, a sliding block 147 is arranged on the sliding rail 1461 in a matched mode, a sliding groove 1473 is arranged on the bottom surface of the sliding block 47, and the sliding groove 1473 is matched with the sliding rail 1461, so that the sliding block can slide left and right; the left side of the sliding block 147 abuts against the first nut 149, the right side of the sliding block 147 is connected with the vertical surface of the L-shaped support plate through the spring 148, a second inclined surface 1471 and a third inclined surface 1472 are arranged on the sliding block 147, one side of the second inclined surface 1471 close to the first nut 149 is lower than one side close to the spring 148, and the second inclined surface 1471 of the sliding block is in parallel contact with the first inclined surface 1451 of the limiting column 145. When the rocker 26 of the transfer trolley is rocked into the trolley through the first nut 149, the rocker 26 pushes the sliding block 147 to move rightwards, the spring 148 is compressed, meanwhile, the limiting column 145 vertically descends under the action of gravity due to the rightward movement of the second inclined surface 1471 on the sliding block, when the limiting column 145 touches the third inclined surface 1472, the limiting column cannot continuously descend, the sliding block 147 is blocked by the limiting column at the moment, and the third inclined surface plays a role in limiting the displacement stroke of the sliding block. When the rocker is rocked out of the first nut in the opposite direction, the slider 147 moves leftward by the elastic restoring force of the spring 148, and the stopper 145 is pushed upward by the second inclined surface 1471 to protrude to the upper surface of the intermediate partition 14.

When the handcart needs to be taken out of the built-in switch cabinet, the handcart transferring method comprises the following steps and principles:

in the first step, the crank is mounted on the rocker head of the trolley rocker 161, the breaker 17 is rocked to the maintenance position by rotating the crank, and the crank is taken down.

And secondly, opening the door of the breaker chamber of the centrally-mounted switch cabinet, moving the transfer trolley 2 to the position right in front of the cabinet body 1 of the switch cabinet, adjusting the height of the support plate 25 of the transfer trolley, horizontally inserting two guide shafts 253 of the transfer trolley into the guide holes 142 of the partition plate in the cabinet body, enabling the front bending part 252 of the transfer trolley to be abutted and attached to the first bending part 141 of the cabinet body, and butting the second guide rail 27 of the transfer trolley with the first guide rail 15 of the cabinet body at the moment, wherein the state is shown in fig. 4.

Thirdly, the crank handle is arranged on the rocker head 264 of the transfer trolley, the crank handle is rotated to enable the transfer trolley rocker 26 to advance to pass through the first through hole 143 of the partition board in the cabinet body and to be fixedly connected with the first nut 149 in a threaded matching way, so that the transfer trolley 2 is reliably locked and fixedly connected with the switch cabinet 1, and accidental disengagement is prevented; the crank is continuously rotated, so that the head of the rocker of the transfer trolley penetrates out of the first nut 149 and extrudes the sliding block 147 to move backwards along the sliding rail 1461, the spring 148 is compressed, meanwhile, the limiting column 145 matched with the second inclined surface 1471 of the sliding block descends under the action of self gravity, the top surface of the limiting column descends below the upper plane of the middle partition plate, and the limiting column does not block the handcart from being pulled out any more; in this step, utilize the inclined plane cooperation between slider and the spacing post to drive the lift of spacing post, played the effect in two aspects: firstly, whether the rocker of the transfer trolley is in threaded connection with the first nut or not is indicated, and the limiting column can lift only on the premise that the rocker passes through the first nut; secondly, only after the limiting column descends, the handcart can be pulled out of the cabinet body, and the blocking of the handcart can be removed. When the rocker of the transfer trolley rotates, the worm section 261 on the rocker drives the worm wheel 281 to rotate, the worm wheel 281 drives the rotating shaft 282 and the gear 283 to rotate, the gear 283 drives the rack 284 to descend, the upper end of the rack 284 is lower than the upper surface of the supporting plate 25 or is level, and the rack no longer blocks the handcart from entering the transfer trolley. Because the initial state of carrying the handcart on the transfer trolley is not available, the rack protrudes out of the upper surface of the support plate of the transfer trolley, which indicates that the transfer trolley is not reliably connected with the switch cabinet and does not have carrying conditions, and the transfer trolley only has the condition of receiving the handcart after the rack is descended and hidden.

And fourthly, pulling the handcart handle 162 to enable the handcart to enter the second guide rail 27 of the transfer trolley along the first guide rail 15 of the cabinet body, and after the handcart is completely transferred to the transfer trolley, outwards poking the handcart handle 162 to enable the handcart handle to be clamped in the limiting hole 271. Then the crank is rotated reversely, so that the rocker 26 of the transfer trolley rotates reversely and retreats, in the process that the rocker 26 retreats and is separated from the first nut 149, the spring 148 pushes the sliding block 147 to move, and the sliding block 147 pushes the limiting column 145 to ascend and protrude out of the surface of the partition board in the cabinet body again; when the rocker of the transfer trolley rotates reversely, the worm section 261 drives the worm wheel 281 to rotate, the worm wheel 281 drives the rotating shaft 282 and the gear 283 to rotate, the gear 283 drives the rack 284 to ascend, so that the rack 284 protrudes out of the upper surface of the support plate 25 of the transfer trolley again, and the protruding rack can play a role in stopping the handcart from retreating; and finally, pushing the transfer trolley to drive the handcart to move forwards from the switch cabinet integrally.

When the circuit breaker is repaired and needs to be put back to the switch cabinet again, the transfer trolley carrying the handcart of the circuit breaker is moved to the front of the cabinet body of the switch cabinet again, the operations of the second step and the third step are repeated, the transfer trolley is aligned with the switch cabinet and locked by the rocker, the rack and the limiting column descend while the rocker is shaken in, then the handcart is pushed into the cabinet body, and finally the rocker is shaken out reversely, so that the transfer trolley and the switch cabinet are unlocked, and the transfer trolley is removed.

Therefore, the transfer trolley realizes the following basic functions: in the process of moving the circuit breaker into or out of the switch cabinet, the height of a guide rail of the transfer trolley is adjusted to be stably butted with a guide rail of a handcart in the switch cabinet, the transfer trolley and the switch cabinet are locked and connected through a rocker and a nut, and the stroke of the rocker of the transfer trolley, the lifting height of the rack, the stroke of the sliding block and the lifting height of the limiting column are matched and matched with each other. In the process of transporting the circuit breaker handcart, the transfer trolley and the handcart are reliable in limiting, the handcart is prevented from sliding or falling, and the transportation safety and reliability are ensured. Therefore, the invention realizes the firm connection and interlocking between the centrally-mounted switch cabinet and the transfer trolley, is beneficial to the safe transfer of the handcart and prevents the unhooking or tipping accidents.

Claims (6)

1. The utility model provides an in put cubical switchboard, the fixed median septum that is provided with of middle part level of the cabinet body, be provided with first guide rail in the both sides of median septum, placed the handcart on first guide rail, the handcart includes chassis car and circuit breaker, is provided with handcart rocker, its characterized in that on the chassis car: the outer side of the middle partition plate is vertically bent downwards to form a first bending part, guide holes are symmetrically formed in two sides of the first bending part, a first through hole is formed in the center of the first bending part, a first nut is fixedly arranged on the inner side of the first bending part, and the first nut is coaxial with the first through hole; a second through hole is formed in the plane of the middle partition plate and close to the first bending part, a guide sleeve is fixedly arranged below the middle partition plate and is coaxial with the second through hole, a limiting column is movably arranged in the guide sleeve, and the lower surface of the limiting column is a first inclined surface; the lower part of the middle partition plate is close to the first bending part and is fixedly provided with an L-shaped support plate, the center of the bottom surface of the L-shaped support plate is provided with an upwards-raised sliding rail, a sliding block is arranged on the sliding rail in a matched mode, one side of the sliding block is abutted against a first nut, the other side of the sliding block is connected with the vertical surface of the L-shaped support plate through a spring, a second inclined surface and a third inclined surface are arranged on the sliding block, one side, close to the direction of the first nut, of the second inclined surface is lower than one side, close to the direction of the spring, of the second inclined surface of the sliding block, and the second inclined surface of the sliding block is in parallel contact with the first inclined surface of the limiting column.

2. The centrally installed switchgear according to claim 1, wherein: the transfer trolley is matched with the cabinet body and comprises a horizontally arranged supporting plate, second guide rails are fixedly arranged on two sides of the supporting plate, the front side and the rear side of the supporting plate are vertically and downwards bent into a front bending part and a rear bending part, guide shafts are symmetrically arranged on two sides of the front bending part, and the guide shafts are matched with the guide holes and correspondingly arranged; the inner sides of the middle parts of the front bending part and the rear bending part are respectively and fixedly provided with a front nut and a rear nut, the middle parts of the front bending part and the rear bending part are penetrated with a transfer trolley rocker, the front end and the rear end of the transfer trolley rocker are respectively provided with a threaded section, namely a front threaded section and a rear threaded section, and the front threaded section and the rear threaded section of the transfer trolley rocker are respectively connected with the front nut and the rear nut in a matched manner through threads; when the guide shaft and the guide hole are aligned along the axial direction, the front nut and the first nut are also aligned along the axial direction, and the specification and the model of the front nut are the same as those of the first nut.

3. A centrally installed switchgear, according to claim 2, characterized in that: a turbine box is fixedly arranged below the supporting plate of the transfer trolley and close to one side of the front bending part, a worm wheel is arranged in the turbine box, a rotating shaft is fixedly arranged at the center of the worm wheel, and a gear is coaxially and fixedly connected to the rotating shaft; a worm section is arranged at one side of the middle part of the transfer trolley rocker close to the front bending part, the transfer trolley rocker penetrates through the turbine box, and the worm section is meshed with the worm wheel in a matching way; a rack seat is vertically and fixedly arranged below the supporting plate, a rack is slidably arranged on the rack seat, the rack is meshed with the gear, and the rack can penetrate through the supporting plate.

4. The centrally installed switchgear according to claim 2, wherein: and two ends of the rear thread section of the transfer trolley rocker are respectively provided with a limiting pin, and the limiting pins penetrate through the rod body of the transfer trolley rocker.

5. A centrally installed switchgear, according to claim 2, characterized in that: the tail end of the transfer trolley rocker is provided with a swinging head, the swinging head of the transfer trolley rocker is consistent with the swinging head of the handcart rocker in shape, and the two swinging heads can share one crank.

6. A handcart transferring method adopting the centrally-mounted switch cabinet as claimed in claim 3, comprising the following steps:

firstly, rotating a handcart rocker to shake a circuit breaker to an overhauling position;

secondly, opening a cabinet door of a breaker chamber of the centrally-mounted switch cabinet, moving the transfer trolley to the front of the switch cabinet, adjusting the height of a support plate of the transfer trolley, horizontally inserting two guide shafts of the transfer trolley into guide holes of a partition plate in the cabinet body, abutting and tightly attaching a front bending part of the transfer trolley and a first bending part of the cabinet body, and butting a second guide rail of the transfer trolley and a first guide rail of the cabinet body;

thirdly, rotating a rocker of the transfer trolley to enable the rocker to advance to penetrate through a first through hole of a partition board in the cabinet body and to be matched and fixedly connected with a first nut in a threaded manner; the crank is continuously rotated, so that the head of the rocker of the transfer trolley penetrates out of the first nut and extrudes the sliding block to move backwards along the sliding rail, the spring is compressed, and meanwhile, the limiting column matched with the second inclined surface of the sliding block descends; when the rocker of the transfer trolley rotates, the rocker worm section drives the worm wheel to rotate, the worm wheel drives the rotating shaft and the gear to rotate, and the gear drives the rack to descend;

fourthly, pulling the handcart to enable the handcart to enter a second guide rail of the transfer trolley along the first guide rail of the cabinet body, reversely rotating a rocker of the transfer trolley to enable the handcart to retreat after the handcart is completely transferred onto the transfer trolley, and pushing the sliding block to move by the spring and pushing the limiting column to ascend by the sliding block in the retreating process of the rocker; meanwhile, the worm section of the rocker drives the worm wheel to rotate, the worm wheel drives the rotating shaft and the gear to rotate, the gear drives the rack to ascend, and when the rocker is separated from the first nut, the transfer trolley can be pushed to drive the handcart to be integrally moved away from the front of the switch cabinet.

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