CN119560925A - AC double circuit breaker switch cabinet for power transmission system - Google Patents

Abstract

The invention discloses an alternating current double-circuit breaker switch cabinet for a power transmission system, which relates to the field of a switch cabinet interlocking structure and comprises a cabinet body, wherein a handcart room is arranged in the cabinet body, a handcart type second circuit breaker is arranged in the handcart room, an interlocking device is arranged between a door of the handcart room and the second circuit breaker, when the door of the handcart room is closed, a safety device releases locking of the second circuit breaker, the second circuit breaker can be driven to move inwards through a driving device, the door is locked by the interlocking device in the inward moving process of the second circuit breaker, the door cannot be opened, after the door is released from locking the door to be opened, the driving device cannot work, the safety device locks the second circuit breaker, and the safety of the switch cabinet is realized through cooperation of multiple devices.

Description

Alternating current double-circuit breaker switch cabinet for power transmission system

Technical Field

The invention relates to the field of interlocking structures of switch cabinets, in particular to an alternating current double-circuit breaker switch cabinet for a power transmission system.

Background

In the switch cabinet engineering application, in order to ensure personal safety of staff during maintenance and inspection, it is very important to set an interlock between different elements of the direct current switch device, for example, an interlock between a cabinet door and a circuit breaker handcart, specifically, when the circuit breaker handcart is in a working position, the cabinet door cannot be opened in order to ensure safety, and only when the circuit breaker is retracted to a test position, the cabinet door can be opened, so that how to realize reliable interlock between the cabinet door and the circuit breaker handcart has been a research focus.

The low-frequency power transmission system switch cabinet is also used in the ocean power generation line, and a linkage mechanism for ensuring safety is arranged in the switch cabinet according to national standard requirements, and is used as a special component of the switch cabinet, so that the switch cabinet is mainly used for preventing operators from damaging switch cabinet equipment or personal injury due to misoperation, improper operation or other reasons.

The existing linkage structure is complex and has low stability, and most of the linkage structure does not have multiple cooperative protection functions.

Disclosure of Invention

The invention aims to solve the technical problem of providing an alternating current double-circuit breaker switch cabinet for a power transmission system, which is provided with a linkage device with a simple structure and high stability.

In order to solve the technical problems, the invention comprises a cabinet body, a handcart room is arranged in the cabinet body, a handcart type second breaker is arranged in the handcart room, a interlocking device is arranged between a door of the handcart room and the second breaker, the interlocking device comprises a locking rod arranged along the moving direction of the second breaker, the locking rod is arranged at the bottom of the handcart room through a shaft seat, a sliding groove is arranged at the upper part of the locking rod along the length direction, a sliding block matched with the sliding groove is fixedly arranged at the bottom of the second breaker, a blind hole is formed at the outer end of the door corresponding to the locking rod, an annular groove is formed in the inner wall of the blind hole, a notch communicated with the annular groove is formed at the outer end of the blind hole, a locking block is fixedly arranged at one side of the outer end of the locking rod, when the locking block is aligned with the notch, the outer end of the locking rod can extend into the blind hole, the sliding groove is divided into a straight groove part and a chute part, when the second breaker is close to the door, the sliding block is moved to the chute part to drive the locking rod to rotate a certain angle, at the moment, the locking block is aligned with the notch, the locking of the door can be opened, the door is arranged between the door and the second breaker and the door is correspondingly provided with the second breaker, a driving device is in a driving state, and can be in a state of being closed.

Preferably, the driving device comprises a hand wheel arranged on the chamber door, the inner end of the shaft of the hand wheel extends into the interior of the handcart chamber, a screw rod parallel to the locking rod is arranged in the handcart chamber through a shaft seat, a driving block matched with threads is arranged at the bottom of the second circuit breaker, a clamping structure is arranged between the outer end of the screw rod and the inner end of the shaft of the hand wheel, and when the chamber door is closed, the outer end of the screw rod is connected with the inner end of the shaft of the hand wheel through the clamping structure.

The preferred design sets up safeties between the room door of car room and the second circuit breaker, safeties includes the strip shaped plate that the indoor bottom of handcart corresponds second circuit breaker both sides department and sets up, the gyro wheel of second circuit breaker is located the strip shaped plate upside, strip shaped plate upper portion one side fixed support that sets up, the support inboard sets up the montant, the outside suit sliding sleeve of montant, sliding sleeve and support fixed connection, the bottom of horizontal pole is connected to the upper end hinge of montant, the outer end and the support upper end of horizontal pole are connected, the interior downside fixed mounting of horizontal pole and the parallel lath of lead screw, a plurality of evenly distributed's draw-in grooves are seted up along length direction to the bottom of lath, the axle of the gyro wheel of second circuit breaker can cooperate with one of them draw-in groove joint, the through-hole parallel with the lead screw is seted up to the montant lower extreme position to the strip shaped plate, set up the push rod in the through-hole, the inner of push rod sets up first inclined plane, the lower extreme of montant stretches into in the through-hole and sets up the second inclined plane with first inclined plane complex, through first spring coupling between with the montant, connect through the second spring coupling between the outer end of push rod and the push rod, between the inboard corresponds the push rod outer end of push rod, the interior side of room door and the push rod and the opposite side of lead screw, when the indoor side corresponds the push rod and the lift down the gyro wheel, the opposite the second inclined plane drives the ejector rod through the inclined plane, the inside the inclined plane and the second inclined plane, the push rod moves down in the inclined plane through the opposite the inclined plane when the ejector rod.

The safety is further improved, misoperation is avoided, the clamping structure comprises a plurality of hole grooves with different sizes at the outer end of the screw rod, and the inner end of the shaft of the hand wheel is provided with a lug with corresponding size corresponding to the hole groove.

Further, a bus chamber, a cable chamber, an instrument chamber and a first breaker chamber are also arranged in the cabinet body.

Further, the instrument room is located the upside of first circuit breaker room, and the handcart room is located first circuit breaker room downside, and busbar room and cable room are located the rear side of handcart formula, and the cable room is located the downside of busbar room.

Further, a three-phase main bus is arranged in the bus chamber, a first breaker is arranged in the first breaker, and a closing resistor which is connected with the first breaker in parallel is arranged in the bus chamber.

Further, a mutual inductor and a grounding switch are arranged in the cable chamber, an upper contact box and a lower contact box are respectively arranged in the bus chamber and the cable chamber, openings corresponding to the upper contact box and the lower contact box are formed in the side wall of the handcart chamber, two contact arms of the second circuit breaker are respectively matched with the upper contact box and the lower contact box in a corresponding mode, the upper contact box is connected with a three-phase main bus through the first circuit breaker, the lower contact box is connected with the mutual inductor, and the mutual inductor is connected with the grounding switch.

In summary, according to the working principle of the invention, when the door of the handcart room is closed, the safety device releases the locking of the second circuit breaker, the second circuit breaker can be driven to move inwards by the driving device, the door is locked by the interlocking device in the process of moving inwards along with the second circuit breaker, finally, the two contact arms of the second circuit breaker are spliced with the upper contact box and the lower contact box to finish closing, in the state, the door cannot be opened, the safety is ensured, the second circuit breaker is driven to move outwards to the limit position by the driving device, the two contact arms of the second circuit breaker are separated from the upper contact box and the lower contact box, the interlocking device releases the locking of the door, at the moment, the door can be opened, after the door is opened, the driving device cannot work, the safety device locks the second circuit breaker, and the safety of the switch cabinet is realized through the cooperation of the multiple devices.

Drawings

The invention is described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is a schematic diagram of the overall internal structure of the present invention;

FIG. 2 is a schematic view of a partial enlarged structure of the portion I of FIG. 1;

FIG. 3 is a schematic view of a portion of a safety device according to the present invention;

FIG. 4 is a schematic diagram of the structure of the door and interlocking device of the present invention in a top view;

FIG. 5 is a schematic diagram of the shaft engagement of the slat with the roller of the second circuit breaker of the present invention;

FIG. 6 is a schematic view of a mating structure of the first inclined surface and the second inclined surface;

FIG. 7 is a schematic view of the mating structure of the door cross-sectional orientation and locking lever;

FIG. 8 is a schematic view of the mating structure of the locking lever and the direction of the inner side of the door;

FIG. 9 is a schematic view of a part of the enlarged structure of the portion II of FIG. 4;

fig. 10 is a partially enlarged schematic view of the portion III of fig. 4.

Detailed Description

Referring to fig. 1-10, the alternating current double-circuit breaker switch cabinet for the power transmission system comprises a cabinet body, wherein a handcart room 1, a bus room 2, a cable room 3, an instrument room 4 and a first circuit breaker room 5 are distributed in the cabinet body, the instrument room 4 is positioned on the upper side of the first circuit breaker room 5, the handcart room 1 is positioned on the lower side of the first circuit breaker room, the bus room and the cable room are positioned on the rear side of the handcart room, the cable room is positioned on the lower side of the bus room, a three-phase main bus 6 is arranged in the bus room, a first circuit breaker 7 is arranged in the first circuit breaker room, a second circuit breaker 8 is arranged in the handcart room, a closing resistor 9 which is arranged in parallel with the first circuit breaker is arranged in the bus room, a mutual inductor 10 and a grounding switch 11 are arranged in the cable room, an upper contact box 12 and a lower contact box 13 are respectively arranged in the bus room, openings corresponding to the upper contact box 12 and the lower contact box 13 are respectively arranged on the side wall of the handcart room, the two contact arms of the second circuit breaker are correspondingly matched with the upper contact box 12 and the lower contact box 13, the upper contact box is connected with the three-phase main circuit breaker through the first circuit breaker and the three-phase main circuit breaker and the three-phase transformer are connected with the mutual inductor.

A linkage device is arranged between the chamber door 14 of the handcart chamber and the second circuit breaker, when the two contact arms of the second circuit breaker are in plug-in fit with the upper contact box 12 and the lower contact box 13, the chamber door is locked and can not be opened, and when the two contact arms of the second circuit breaker are completely separated from the upper contact box 12 and the lower contact box 13, the chamber door can be opened.

The interlocking device comprises a locking rod 15 arranged along the moving direction of a second circuit breaker, the locking rod is arranged at the indoor bottom of a handcart through a shaft seat, a sliding groove 16 is arranged at the upper part of the locking rod along the length direction, a sliding block 17 matched with the sliding groove is fixedly arranged at the bottom of the second circuit breaker, a blind hole 18 is formed at the outer end of the chamber door, an annular groove 19 is formed in the inner wall of the blind hole 18, a notch 20 communicated with the annular groove 19 is formed at the outer end of the blind hole, a locking block 21 is fixedly arranged at one side of the outer end of the locking rod, when the locking block is aligned with the notch, the outer end of the locking rod can extend into the blind hole, the locking block is rotated by a certain angle to enable the locking block not to be aligned with the notch, at the moment, the outer end of the locking rod cannot be separated from the chamber door, the chamber door cannot be locked and cannot be opened at the moment because the locking rod can only be rotated, the chamber door is divided into a straight groove part 161 and a chute part 162, when two contact arms of the second circuit breaker are completely separated from an upper contact box 12 and a lower contact box 13 and are close to the chamber door to a limiting position, the sliding block moves to the chute part, the locking block can rotate to a certain angle, the locking block can be rotated to a certain angle to drive the locking block to rotate to be aligned with the notch, and the locking door can be opened.

The driving device is arranged between the door 14 of the handcart room and the second circuit breaker, when the door is in a closed state, the second circuit breaker can be driven to move in the handcart room by the driving device, and the two contact arms of the second circuit breaker are controlled to be connected with and separated from the upper contact box 12 and the lower contact box 13 in an inserting mode.

The driving device comprises a hand wheel 22 arranged on a chamber door, the inner end of the shaft of the hand wheel extends into the interior of a handcart chamber, a screw rod 23 parallel to the locking rod 15 is arranged in the handcart chamber through a shaft seat, a driving block 24 matched with threads is arranged at the bottom of the second circuit breaker, a clamping structure is arranged between the outer end of the screw rod and the inner end of the shaft of the hand wheel, when the chamber door is closed, the outer end of the screw rod is connected with the inner end of the shaft of the hand wheel through the clamping structure, and at the moment, the screw rod can be driven to rotate by shaking the hand wheel outside the chamber door, so that the second circuit breaker is driven to move through the driving block. Through the design, the movement of the second circuit breaker can be regulated by rotating the lead screw only after the chamber door is closed, and the condition that the chamber door is in an open state is avoided, and the second circuit breaker is driven to be closed.

A safety device is arranged between a chamber door 14 of a handcart chamber and a second circuit breaker, the safety device comprises a strip-shaped plate 25 arranged at the bottom of the handcart chamber corresponding to the two sides of the second circuit breaker, a roller of the second circuit breaker is arranged at the upper side of the strip-shaped plate, a bracket 26 is fixedly arranged at one side of the upper part of the strip-shaped plate 25, a vertical rod 27 is arranged at the inner side of the bracket, a sliding sleeve 28 is sleeved outside the vertical rod 27 and fixedly connected with the bracket, the upper end of the vertical rod 27 is hinged with the bottom of a cross rod 31, the outer end of the cross rod 31 is hinged with the upper end of the bracket, a long strip plate 29 parallel to a screw rod is fixedly arranged at the lower side of the inner end of the cross rod, a plurality of clamping grooves 30 which are uniformly distributed are formed at the bottom of the long strip plate 29 along the length direction, the shaft of the roller of the second circuit breaker can be matched with one of the clamping grooves in a clamping way, a through hole 32 parallel to the screw rod is formed at the position corresponding to the lower end of the vertical rod, a push rod 33 is arranged in the through hole 32, a first inclined surface 34 is arranged at the inner end of the push rod 33, the lower end of the vertical rod stretches into the through hole and is provided with a second inclined plane 35 matched with the first inclined plane, the vertical rod is connected with the sliding sleeve through a first spring 36, the push rod 33 is connected with the outer end of the through hole through a second spring 37, a push rod 38 is arranged between the inner side of the chamber door and the outer end of the corresponding push rod, when the chamber door is closed, the push rod pushes the push rod inwards, the vertical rod moves upwards through the matching of the first inclined plane and the second inclined plane, the cross rod moves upwards under the driving of the vertical rod to drive the long strip plate to lift, at the moment, the shaft of the roller of the second circuit breaker is separated from the clamping groove, at the moment, the locking of the second circuit breaker is released, the second circuit breaker can be driven to move through the driving device, when the chamber door is opened, the shaft of the roller of the second circuit breaker is matched with one of the clamping grooves in a clamping way, at the moment, the second circuit breaker is locked, even if the screw rod is rotated, the second circuit breaker cannot be driven to move, further improving the safety.

The clamping structure comprises a plurality of hole slots 39 with different sizes at the outer end of the screw rod, the inner end of the shaft of the hand wheel is provided with a lug 40 with corresponding size corresponding to the hole slot, after the lug with different sizes is aligned with the hole slot, the outer end of the screw rod is connected with the inner end of the shaft of the hand wheel through the clamping structure, through the design, when the room door is opened, the driving of the screw rod can not be realized through a conventional tool, and the second circuit breaker can not be driven, so that the safety is further improved, and misoperation is avoided.

When the door of the handcart room is closed, the safety device releases the locking of the second circuit breaker, the second circuit breaker can be driven to move inwards through the driving device, the door is locked by the interlocking device along with the process that the second circuit breaker moves inwards, finally, the two contact arms of the second circuit breaker are spliced with the upper contact box 12 and the lower contact box 13 to complete closing, in the state, the door cannot be opened, safety is ensured, the second circuit breaker is driven to move outwards to the limit position through the driving device, the two contact arms of the second circuit breaker are separated from the upper contact box 12 and the lower contact box 13, the interlocking device releases the locking of the door, the door can be opened at the moment, after the door is opened, the driving device cannot work, the safety device locks the second circuit breaker, the safety of the switch cabinet is realized through the cooperation of the multiple devices, the structure is simple, the stability is high, and the safety is provided with multiple cooperative protection functions.

Claims (8)

1. The alternating current double-circuit breaker switch cabinet for the power transmission system is characterized by comprising a cabinet body, wherein a handcart room is arranged in the cabinet body, a handcart type second circuit breaker is arranged in the handcart room, a linkage device is arranged between a door of the handcart room and the second circuit breaker, the linkage device comprises a locking rod arranged along the moving direction of the second circuit breaker, the locking rod is arranged at the bottom of the handcart room through a shaft seat, a sliding groove is arranged on the upper part of the locking rod along the length direction, a sliding block matched with the sliding groove is fixedly arranged at the bottom of the second circuit breaker, a blind hole is formed in the outer end of the door, an annular groove is formed in the inner wall of the blind hole, a notch communicated with the annular groove is formed in the outer end of the blind hole, a locking piece is fixedly arranged on one side of the outer end of the locking rod, when the locking piece is aligned with the notch, the outer end of the locking rod can extend into the blind hole, the sliding groove is divided into a straight groove part and a chute part, when the second circuit breaker is close to the door, the sliding block is moved to the chute part to drive the locking rod to rotate by a certain angle, at the moment, the locking piece is aligned with the notch is released, the locking of the door can be opened, the annular groove is arranged at the position of the second circuit breaker, and the door can be driven to be in a state when the second circuit breaker is in a driving state.

2. The alternating current double circuit breaker switch cabinet for a power transmission system according to claim 1, wherein the driving device comprises a hand wheel arranged on a chamber door, the inner end of a shaft of the hand wheel extends into the interior of the hand car chamber, a screw rod parallel to the locking rod is arranged in the hand car chamber through a shaft seat, a driving block matched with threads is arranged at the bottom of the second circuit breaker, a clamping structure is arranged between the outer end of the screw rod and the inner end of the shaft of the hand wheel, and when the chamber door is closed, the outer end of the screw rod is connected with the inner end of the shaft of the hand wheel through the clamping structure.

3. An alternating current double circuit breaker switch cabinet for a power transmission system is characterized in that a safety device is arranged between a door of a handcart room and a second circuit breaker, the safety device comprises a strip-shaped plate which is arranged at the bottom of the handcart room and corresponds to two sides of the second circuit breaker, a roller of the second circuit breaker is arranged on the upper side of the strip-shaped plate, a support is fixedly arranged on one side of the upper part of the strip-shaped plate, a vertical rod is arranged on the inner side of the support, a sliding sleeve is sleeved outside the vertical rod and fixedly connected with the support, the upper end of the vertical rod is hinged with the bottom of a cross rod, the outer end of the cross rod is hinged with the upper end of the support, a long slat which is parallel to the lead screw is fixedly arranged at the lower side of the inner end of the cross rod, a plurality of clamping grooves which are uniformly distributed are formed in the length direction are formed in the bottom of the long slat, a through hole which is parallel to the lead screw is formed in the position of the lower end of the strip-shaped plate, a push rod is arranged in the through hole, the inner end of the push rod is provided with a first inclined surface, the lower end of the push rod stretches into the through hole and is provided with a second inclined surface which is matched with the first inclined surface, the push rod is connected with the sliding sleeve through a first spring, the upper end of the vertical rod is hinged with the bottom of the support, the upper end of the vertical rod is hinged with the upper end of the horizontal rod, the vertical rod is connected with the upper end of the second inclined rod through the second inclined surface, the second inclined surface which is correspondingly arranged in the chamber, when the inner side of the chamber door is in the chamber is in a position of the opposite direction of the opposite to be closed, and the lower end of the upper end of the vertical rod is in which is in a position, and the opposite to be closed.

4. The alternating current double circuit breaker switch cabinet for a power transmission system of claim 2 wherein the clamping structure comprises a plurality of hole slots with different sizes at the outer end of the screw rod, and the inner end of the shaft of the hand wheel is provided with a lug with corresponding size corresponding to the hole slot.

5. An AC double circuit breaker switchgear for a power transmission system as in claim 1 wherein the switchgear body is further provided with a bus compartment, a cable compartment, an instrument compartment, a first circuit breaker compartment.

6. An ac double circuit breaker switchgear for a transmission system according to claim 5 wherein the meter compartment is located on the upper side of the first circuit breaker compartment, the cart compartment is located on the lower side of the first circuit breaker compartment, the bus bar compartment and the cable compartment are located on the rear side of the cart compartment, and the cable compartment is located on the lower side of the bus bar compartment.

7. An ac double circuit breaker switchgear for a transmission system as in claim 6 wherein a three-phase main bus is provided in a bus room, a first circuit breaker is provided in a first circuit breaker room, and a closing resistor is provided in parallel with the first circuit breaker in the bus room.

8. An ac double circuit breaker switch cabinet for a power transmission system as in claim 7 wherein a transformer and a grounding switch are disposed in the cable chamber, the bus chamber and the cable chamber are respectively provided with an upper contact box and a lower contact box, the side wall of the handcart chamber is provided with openings corresponding to the upper contact box and the lower contact box, two contact arms of the second circuit breaker are respectively matched with the upper contact box and the lower contact box, the upper contact box is connected with a three-phase main bus through a first circuit breaker, the lower contact box is connected with the transformer, and the transformer is connected with the grounding switch.