CN116168990A - Arc extinguishing device for handcart contact of 10KV centrally installed switchgear - Google Patents
Arc extinguishing device for handcart contact of 10KV centrally installed switchgear Download PDFInfo
- Publication number
- CN116168990A CN116168990A CN202310430548.9A CN202310430548A CN116168990A CN 116168990 A CN116168990 A CN 116168990A CN 202310430548 A CN202310430548 A CN 202310430548A CN 116168990 A CN116168990 A CN 116168990A
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- Prior art keywords
- circuit breaker
- contact
- arc extinguishing
- handcart
- extinguishing device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/26—Arrangements of fuses, resistors, voltage arresters or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
- H02B11/04—Isolating-contacts, e.g. mountings or shieldings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type
Abstract
The utility model relates to a 10KV puts cabinet handcart contact's extinguishing device relates to extinguishing device's field, it is including putting cabinet body and circuit breaker handcart in, put and offered the circuit breaker chamber on the cabinet body in, the circuit breaker intracavity is provided with the static contact, circuit breaker handcart sliding connection is in the circuit breaker intracavity, and be used for inserting the moving contact of static contact through circuit breaker fixedly connected with, the lateral wall in the outstanding circuit breaker chamber of direction towards being close to the moving contact of static contact, the cover is equipped with the support frame that can stretch out and draw back on the static contact, the support frame also is used for the cover to establish on the moving contact, and the slip direction of moving contact is followed to the flexible orientation of support frame, fixedly connected with is used for promoting the flexible push pedal of support frame on the moving contact, be provided with a plurality of main shower nozzles on the support frame, a plurality of main shower nozzles all are towards the inside of support frame, all main shower nozzles communicate jointly and have the air feed assembly, the air feed assembly is used for supplying the quenching gas to main shower nozzle. The electric arc generating device has the effect that electric arcs are not easy to generate between the moving contact and the fixed contact.
Description
Technical Field
The application relates to the field of arc extinguishing devices, in particular to an arc extinguishing device for a handcart contact of a 10KV centrally installed switchgear.
Background
The centrally installed switchgear belongs to a high-voltage distribution device and is all called metal armoured centrally installed movable switch equipment. The upper layer of the centrally installed switchgear is a bus and instrument room, the middle layer is a breaker room, and the lower layer is a cable room, so that the centrally installed switchgear is simply called as the centrally installed switchgear because the breaker room is positioned in the middle layer, and the working voltage of the centrally installed switchgear mainly comprises 3.6KV, 7.2KV, 10KV and 12KV.
The circuit breaker chamber of the centrally installed switchgear is used for accommodating a circuit breaker handcart and inserting the circuit breaker, the circuit breaker is fixedly connected to the circuit breaker handcart, the circuit breaker handcart is fixedly connected with a moving contact, a fixed contact for inserting the moving contact is fixedly arranged in the circuit breaker chamber, and the circuit breaker handcart slides into or slides out of the circuit breaker chamber in a sliding rail and roller manner. When the circuit breaker is used, the circuit breaker handcart is pushed to slide into the circuit breaker chamber, and the moving contact gradually approaches to the fixed contact along with the circuit breaker handcart until the moving contact is inserted into the fixed contact, so that the electric connection between the moving contact and the fixed contact is realized.
Aiming at a 10KV centrally installed switchgear, the switchgear needs to be frequently pulled out and pushed in by a circuit breaker handcart in the use process, an electric arc is easy to generate in the process that a moving contact and a fixed contact are close to each other or are far away from each other, under the action of the electric arc, the moving contact and the fixed contact are easy to generate heat and blacken, and then the centrally installed switchgear is easy to break down.
Disclosure of Invention
In order to prevent electric arcs from being generated between a moving contact and a fixed contact, the application provides an arc extinguishing device for a handcart contact of a 10KV centrally installed switchgear.
The application provides an arc extinguishing device of a handcart contact of a 10KV centrally installed switchgear, which adopts the following technical scheme:
the utility model provides an arc extinguishing device of cabinet handcart contact in 10KV, is including putting cabinet body and circuit breaker handcart in, put and offered the circuit breaker chamber on the cabinet body in, be provided with the static contact in the circuit breaker intracavity, circuit breaker handcart sliding connection is in the circuit breaker intracavity, and be used for inserting through circuit breaker fixedly connected with the moving contact of static contact, the static contact is towards being close to the direction of moving contact is outstanding the lateral wall in circuit breaker chamber, the cover is equipped with fixed connection on the static contact and is in on the lateral wall of circuit breaker chamber and the support frame that can stretch out and draw back, the support frame also is used for the cover to establish on the moving contact, and stretch out and draw back the direction of moving contact is followed fixedly connected with on the moving contact is used for promoting the flexible push pedal of support frame, be provided with a plurality of main shower nozzles on the support frame, a plurality of main shower nozzles all are towards the inside of support frame, all main shower nozzles communicate jointly and have the air feed subassembly, the air feed subassembly is used for to main shower nozzle supplies the arc extinguishing gas.
Through adopting above-mentioned technical scheme, the moving contact slides into the circuit breaker intracavity along with the circuit breaker handcart, air feed assembly lets in all main shower nozzle departments with the arc extinguishing gas, the arc extinguishing gas spouts the inside region of support frame from main shower nozzle, the arc extinguishing gas mixes in the air, and along with the continuous injection of arc extinguishing gas, the inside arc extinguishing gas's of support frame duty cycle increases gradually, make the arc extinguishing gas replace the air gradually, thereby be close to the stationary contact gradually at the moving contact or keep away from the in-process of stationary contact, under the insulating protection of arc extinguishing gas, be difficult for producing electric arc between moving contact and the stationary contact, thereby make moving contact and stationary contact be difficult for generating heat, blackening under the effect of electric arc.
The movable contact pushes the support frame to shrink through the push pedal, makes the injection region of main shower nozzle on the support frame be in between movable contact and the static contact all the time, and the nearer the distance of movable contact and static contact, the concentration of the quenching gas between movable contact and the static contact is also bigger to make the concentration of quenching gas be convenient for adjust according to the distance between movable contact and the static contact, and then under the condition that does not increase quenching gas injection quantity, be difficult for producing electric arc between easily guaranteeing movable contact and the static contact.
Optionally, the support frame includes stay tube and link, the stay tube is provided with a plurality ofly, and follows the slip direction of moving contact arranges, the link is diamond frame, and each tie point all articulates, the link is provided with the multiunit, and is located a plurality of respectively between the stay tube, every group the link is provided with a plurality of, all in every group the link is around the one week of stay tube is arranged, two tie points that the link is just right articulate respectively on two adjacent of self on the stay tube, main shower nozzle is connected on the stay tube, the stay tube with air feed subassembly intercommunication.
Through adopting above-mentioned technical scheme, the stay tube is connected, is supported through the link of diamond for a plurality of stay tubes easily realize carrying out the flexible along the slip direction of moving contact, make the moving contact be convenient for promote a plurality of stay tubes shrink through the push pedal, thereby the support frame that stay tube, link formed makes the main shower nozzle easily spray the arc extinguishing gas between moving contact and stationary contact.
Optionally, a spring is fixedly arranged between two connection points of the connecting frame, which are opposite to each other along the circumferential direction of the supporting tube, and the spring is used for driving the connecting frame to deform along the sliding direction of the moving contact.
Through adopting above-mentioned technical scheme, after a plurality of stay tubes compress the link under the effect of push pedal, the spring follows the link and warp and store elasticity, and when the push pedal followed circuit breaker handcart roll-off circuit breaker chamber, the spring is driven the link through the elasticity of storage and is restored the normal position for the stay tube can be reset under the effect of link, thereby makes the moving contact can follow the moving contact and stretch out when keeping away from the stationary contact.
Optionally, the inboard of stay tube is the opening form, the inboard opening part rotation of stay tube is connected with annular sliding plate, main shower nozzle be provided with the multiunit, and with the stay tube one-to-one, every group main shower nozzle all is provided with a plurality of, every group is all main shower nozzle all communicates on the sliding plate, and around the circumference equipartition setting of sliding plate, main shower nozzle is followed the gliding direction of moving contact is towards deviating from the slope of stay tube diameter sets up.
Through adopting above-mentioned technical scheme, in the air feed assembly supplied the stay tube with the arc extinguishing gas, the arc extinguishing gas flowed to main shower nozzle from the stay tube, and from main shower nozzle blowout, because main shower nozzle is along moving contact gliding direction and towards deviating the direction slope setting of stay tube diameter for the arc extinguishing gas that main shower nozzle jetted easily promotes the sliding plate and rotates, also can stir the arc extinguishing gas between the stay tube simultaneously, thereby the arc extinguishing gas between the messenger support frame easily stirs evenly, and then the space between messenger moving contact and the static contact is difficult for remaining the electric arc passageway, make difficult the production electric arc between moving contact and the static contact more.
Optionally, the link is followed two tie points of stay tube circumference are all fixedly connected with auxiliary spray head, auxiliary spray head orientation inside the support frame, auxiliary spray head is close to the inside one end intercommunication of support frame has two reposition of redundant personnel mouths, two the reposition of redundant personnel mouth is followed the slip direction of moving contact arranges, and along the direction slope setting of keeping away from each other, auxiliary spray head with air feed assembly intercommunication.
By adopting the technical scheme, the auxiliary spray heads are arranged on the connecting frame, so that the area between two adjacent support tubes is easy to be filled with arc extinguishing gas; the two shunt nozzles are arranged along the sliding direction of the moving contact and are obliquely arranged along the direction away from each other, so that the two shunt nozzles can shunt and spray the arc-extinguishing gas in the auxiliary spray head, one part of the arc-extinguishing gas sprayed by the shunt nozzles arranged obliquely is sprayed towards the inside of the support frame, the other part of the arc-extinguishing gas sprayed along the telescopic direction of the support frame forms a barrier for preventing the arc-extinguishing gas inside the support frame from escaping in the telescopic direction of the support frame, the arc-extinguishing gas inside the support frame is difficult to escape to the outside of the support frame, the arc-extinguishing gas between the moving contact and the fixed contact is easy to be in a stable state, and a stable arc-extinguishing channel is formed, so that an arc is not easy to generate between the moving contact and the fixed contact.
Optionally, two the reposition of redundant personnel mouth all with auxiliary shower nozzle flexonics, two the reposition of redundant personnel mouth with the link is close to two members of reposition of redundant personnel mouth are crossed and are provided with two regulation poles, two the middle part of adjusting the pole is articulated, adjust the pole both ends respectively with the reposition of redundant personnel mouth the member of link articulates.
Through adopting above-mentioned technical scheme, when the link shrink or stretch out, the member bar of link can rotate, and two regulation poles of member bar drive of link rotate, and two regulation poles drive two reposition of redundant personnel mouth wobbles to make contained angle between two reposition of redundant personnel mouths can follow the link and adjust, make the reposition of redundant personnel mouth form and hinder the barrier that dissipates also can follow the distance between contact and the stationary contact and adjust.
Optionally, the air feed subassembly includes air feed bottle and switch piece, the air feed bottle pass through the pipeline with the switch piece intercommunication, the switch piece pass through the hose with main shower nozzle the auxiliary shower nozzle all communicates, be equipped with liquid nitrogen in the air feed bottle, and fixed connection is in on the lateral wall of centrally installed switchgear body, the switch piece is fixed to be set up in the circuit breaker intracavity, and be used for according to the travel control of circuit breaker handcart the air feed bottle with main shower nozzle the break-make of auxiliary shower nozzle.
Through adopting above-mentioned technical scheme, the circuit breaker handcart makes gas feed bottle and main shower nozzle, auxiliary shower nozzle intercommunication or disconnection through the switch block in the removal process, when the circuit breaker handcart promotes the moving contact and moves to the position that can produce electric arc with the static contact, the switch block makes gas feed bottle and main shower nozzle, auxiliary shower nozzle intercommunication, liquid nitrogen in the gas feed bottle is spouted from main shower nozzle, auxiliary shower nozzle, after moving contact and auxiliary contact accomplish to insert, the switch block makes gas feed bottle and main shower nozzle, auxiliary shower nozzle disconnection for liquid nitrogen is difficult to spout from main shower nozzle, auxiliary shower nozzle, and then makes the injection of liquid nitrogen adjust according to the stroke between moving contact and the static contact; meanwhile, liquid nitrogen is adopted to cool the surfaces of the moving contact and the fixed contact, so that the moving contact and the fixed contact are not easy to heat and even blacken.
Optionally, the switch piece includes fixed block and rotating block, the fixed block is fixed to be set up the circuit breaker intracavity, the rotating block rotates to be connected on the fixed block, the fixed block the inside cavity state that all is of rotating block, the fixed block with the vent hole has all been seted up to one side that the rotating block is close to each other, the fixed block the vent hole with the vent hole one-to-one of rotating block, the air feed bottle pass through the pipeline with the inside intercommunication of fixed block, the rotating block pass through the hose with main shower nozzle the equal intercommunication of auxiliary shower nozzle, the circuit breaker intracavity is provided with switch assembly, switch assembly is used for order about in the slip in-process of circuit breaker handcart the rotating block with fixed block intercommunication or disconnection.
Through adopting above-mentioned technical scheme, through the air vent of switch module control rotor and the air vent of fixed block just to or dislocation for the intercommunication of air feed bottle and main shower nozzle, auxiliary shower nozzle is convenient for control.
Optionally, the switch assembly includes a gear, a first row Cheng Chitiao and a second travel rack, the gear and the rotating block are coaxially and fixedly connected, the first row Cheng Chitiao and the second travel rack are fixedly connected on the circuit breaker handcart along a sliding direction of the circuit breaker handcart, the gear is used for being meshed with the first row Cheng Chitiao and the second travel rack, in a process that the circuit breaker handcart slides into a circuit breaker cavity, the first row Cheng Chitiao is used for enabling the vent hole of the rotating block and the vent hole of the fixed block to be in a dead-facing position, and the second travel rack is used for enabling the vent hole of the rotating block and the vent hole of the fixed block to be in a dislocation state.
Through adopting above-mentioned technical scheme, the circuit breaker handcart drives first row Cheng Chitiao, the second stroke rack removes, when the circuit breaker handcart drives the moving contact and slides into the circuit breaker intracavity, first row Cheng Chitiao first with the gear engagement transmission, after first row Cheng Chitiao with the gear engagement transmission, make the air vent of rotor and the air vent of fixed block be in just right state, then the second stroke rack with the gear engagement transmission, after the transmission of second stroke rack with the gear engagement, make the air vent of rotor and the air vent of fixed block be in dislocation state, make main shower nozzle, auxiliary shower nozzle spray the arc extinguishing gas easily control according to the stroke position of moving contact.
Optionally, the top of support frame is provided with the collection mouth, it has the compressor to collect the mouth through the pipeline intercommunication, the compressor has the recovery bottle through the pipeline intercommunication, collect the mouth with the top fixed connection in circuit breaker chamber, the compressor the equal fixed connection of recovery bottle is in put on the lateral wall of cabinet body.
Through adopting above-mentioned technical scheme, nitrogen gas between the support frame enters into the compressor from collecting nozzle, and the compressor compresses the nitrogen gas of mixed part air, and makes the gas after the compression flow into in the recovery bottle, and then makes nitrogen gas recycle of being convenient for, has reduced the cost of nitrogen gas arc extinction.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the main spray head and the auxiliary spray head are supported by the support frame, and nitrogen is supplied to the main spray head and the auxiliary spray head by the gas supply bottle, so that nitrogen is easily filled between the moving contact and the fixed contact, and electric arcs are not easily generated between the moving contact and the fixed contact;
2. the main spray head is obliquely arranged on the sliding plate, so that the main spray head can stir the nitrogen in the support frame when spraying the nitrogen into the support frame, the nitrogen between the moving contact and the fixed contact is easy to be uniform, and an arc channel is difficult to form between the moving contact and the fixed contact;
3. the auxiliary spray head sprays nitrogen into the support frame through the two shunt nozzles, one part of nitrogen is directly sprayed into the support frame, the other part of nitrogen is sprayed along the sliding direction of the moving contact, the nitrogen sprayed along the sliding direction of the moving contact enables the edge of the support frame to form a barrier for preventing the nitrogen from escaping, and then a stable nitrogen column is easy to form between the moving contact and the fixed contact, so that an electric arc is difficult to form between the moving contact and the fixed contact.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present application;
FIG. 2 is a cross-sectional view intended to illustrate a support frame;
FIG. 3 is a schematic view for explaining the structure of the support tube and the connection frame;
FIG. 4 is a schematic view for explaining the structure of the auxiliary shower head;
fig. 5 is an enlarged view at a in fig. 4;
fig. 6 is a cross-sectional view for explaining the vent hole.
Reference numerals illustrate:
1. a centrally installed switchgear body; 11. a circuit breaker cavity; 12. a stationary contact; 2. a circuit breaker trolley; 21. a moving contact; 22. a push plate; 3. a support frame; 31. a support tube; 311. a sliding plate; 32. a connecting frame; 321. a spring; 4. a main spray head; 5. a gas supply assembly; 51. a gas supply cylinder; 52. a switch block; 521. a fixed block; 522. a rotating block; 523. a vent hole; 6. an auxiliary spray head; 61. a flow dividing nozzle; 62. an adjusting rod; 7. a switch assembly; 71. a gear; 72. first row Cheng Chitiao; 73. a second stroke rack; 8. a recovery assembly; 81. a collection nozzle; 82. a compressor; 83. and (5) recycling the bottle.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
The embodiment of the application discloses an arc extinguishing device of a handcart contact of a 10KV centrally installed switchgear. Referring to fig. 1 and 2, an arc extinguishing device of a 10KV centrally installed switchgear handcart contact comprises a centrally installed switchgear body 1 and a breaker handcart 2, wherein a breaker cavity 11 is formed in the middle of the centrally installed switchgear body 1, a plurality of fixed contacts 12 are fixedly arranged in the breaker cavity 11, the breaker handcart 2 is slidably arranged in the breaker cavity 11 through rollers and sliding rails, the breaker handcart 2 is fixedly connected with a plurality of movable contacts 21 through the breaker, the movable contacts 21 are in one-to-one correspondence with the fixed contacts 12, a telescopic support frame 3 is sleeved on each fixed contact 12, a main spray head 4 is arranged on the support frame 3, the main spray head 4 is communicated with an air supply assembly 5, and the air supply assembly 5 is used for supplying arc extinguishing gas to the main spray head 4.
When the circuit breaker handcart 2 is used, the circuit breaker handcart 2 is pushed into or pulled out of the circuit breaker cavity 11, the moving contact 21 is close to and inserted into the fixed contact 12, or the moving contact 21 is pulled out and far away from the fixed contact 12, the gas supply assembly 5 is used for introducing arc extinguishing gas into the main spray head 4, the main spray head 4 is used for spraying the arc extinguishing gas between the moving contact 21 and the fixed contact 12, electric arcs are not easy to generate between the moving contact 21 and the fixed contact 12, and the moving contact 21 and the fixed contact 12 are not easy to generate heat and blacken.
Referring to fig. 2 and 3, the moving contact 21 and the fixed contact 12 are both circular, the sliding direction of the moving contact 21 is the same as the axial direction of the fixed contact 12, the fixed contact 12 is used for inserting the moving contact 21, the fixed contact 12 protrudes out of the side wall of the breaker cavity 11 towards the direction close to the moving contact 21, and the central axis of the support frame 3 coincides with the axial line of the fixed contact 12.
The support frame 3 includes stay tube 31 and link 32, and the stay tube 31 is provided with a plurality ofly, and arranges along the axis direction of stationary contact 12, and stay tube 31 is circular cyclic annular, and the cross-section along circumference is the rectangle, and a plurality of stay tubes 31 all set up coaxially, and all set up with stationary contact 12 coaxially, leave the clearance between two adjacent stay tubes 31, the stay tube 31 that is closest to stationary contact 12 and the lateral wall fixed connection of circuit breaker chamber 11.
Referring to fig. 3, the inner side wall of the support tube 31 is open, a sliding plate 311 is rotatably connected to the opening of the support tube 31, the sliding plate 311 is in a ring shape and is matched with the opening of the support tube 31, and the sliding plate 311 and the support tube 31 are in a sealing state.
The main spray heads 4 are provided with a plurality of groups and are in one-to-one correspondence with the plurality of supporting tubes 31, the number of the main spray heads 4 in each group is a plurality, all the main spray heads 4 in each group are communicated on the sliding plate 311 and uniformly distributed around the axis direction of the sliding plate 311, and the main spray heads 4 are obliquely arranged in the direction close to the center of the sliding plate 311 towards the direction close to the fixed contact 12 and obliquely arranged in the direction deviating from the diameter of the sliding plate 311.
The connecting frames 32 are provided with a plurality of groups and are respectively positioned between two adjacent supporting pipes 31, the connecting frames 32 of each group are provided with a plurality of connecting frames 32, all the connecting frames 32 of each group are uniformly distributed around the axial direction of the supporting pipes 31, the connecting frames 32 are diamond frames, all the connecting points are hinged, one pair of opposite connecting points of the connecting frames 32 are respectively hinged with two supporting pipes 31 adjacent to the connecting frames, a spring 321 is fixedly arranged between the other pair of opposite connecting points of the connecting frames 32, and the spring 321 is used for driving the connecting frames 32 to deform towards the axial direction of the supporting pipes 31.
Referring to fig. 4 and 5, two connection points of the connecting frame 32, which are close to the spring 321, are fixedly connected with an auxiliary spray head 6, the auxiliary spray head 6 is rectangular and tubular, and faces the inside of the supporting frame 3, the auxiliary spray head 6 is communicated with two split nozzles 61 through flexible connection, the two split nozzles 61 are distributed along the axial direction of the supporting tube 31 and are obliquely arranged along the direction away from each other, and the split nozzles 61 are rectangular and tubular. The flexible connection between the auxiliary nozzle 6 and the diverter nozzle 61 may be soft rubber, bellows, etc., and in this application, the flexible connection between the auxiliary nozzle 6 and the diverter nozzle 61 is a bellows, and this application does not specifically limit the flexible connection between the auxiliary nozzle 6 and the diverter nozzle 61.
Referring to fig. 5, two adjusting rods 62 are provided between the two diverting nozzles 61 and two bars of the connecting frame 32 near the auxiliary spray head 6 in a crossing manner, the middle parts of the two adjusting rods 62 are hinged, the adjusting rods 62 are curved in an arc shape, one end of each adjusting rod 62 is hinged with the diverting nozzle 61, and the other end is hinged with the bars of the connecting frame 32.
Referring to fig. 2, a push plate 22 is fixedly connected to the moving contact 21, the push plate 22 is vertically disposed and has a circular plate shape, and the diameter of the push plate 22 is not smaller than the outer diameter of the support tube 31.
When the circuit breaker handcart 2 is used, the circuit breaker handcart 2 slides into the circuit breaker cavity 11, the moving contact 21 gradually slides to the fixed contact 12, the push plate 22 on the moving contact 21 pushes the support pipes 31 to move, the support pipes 31 stretch under the connection and support of the connecting frame 32, the connecting frame 32 between two adjacent support pipes 31 deforms towards the circumferential direction of the support pipes 31, meanwhile, the elastic force is accumulated by the springs 321, the connecting frame 32 adjusts the spraying directions of the two shunt nozzles 61 through the two adjusting rods 62 in the deformation process, the distance between the two adjacent support pipes 31 is gradually shortened along with the sliding of the circuit breaker handcart 2 until the moving contact 21 is inserted into the fixed contact 12, and the main spray head 4 and the auxiliary spray head 6 are easy to be always positioned between the moving contact 21 and the fixed contact 12 in the deformation process of the connecting frame 32.
When the circuit breaker handcart 2 slides out of the circuit breaker cavity 11, the pushing plate 22 releases the pushing force on the supporting tubes 31, the connecting frame 32 is restored under the action of the elastic force of the spring 321, and the supporting tubes 31 are also restored under the pushing of the connecting frame 32, so that the main spray head 4 and the auxiliary spray head 6 are also easy to be positioned between the movable contact 21 and the fixed contact 12 in the process of sliding the circuit breaker handcart 2 out of the circuit breaker cavity 11.
Referring to fig. 1, the air supply assembly 5 includes an air supply bottle 51 filled with liquid nitrogen and a switch block 52 for controlling the air supply bottle 51 to give off air, the air supply bottle 51 is fixedly connected to the outer side wall of the centrally installed switchgear body 1, the switch block 52 is located at one side of the circuit breaker handcart 2 close to the air supply bottle 51, the switch block 52 includes a fixed block 521 and a rotating block 522, the fixed block 521 and the rotating block 522 are hollow and are located in the circuit breaker cavity 11, the fixed block 521 and the rotating block 522 are round blocks, the axis direction is vertical, the fixed block 521 is fixedly connected with the bottom of the circuit breaker cavity 11, the rotating block 522 is located above the fixed block 521 and is coaxially arranged with the fixed block 521, the rotating block 522 is rotatably connected with the fixed block 521, and the bottom surface is in butt joint with the top surface of the fixed block 521.
Referring to fig. 6, a plurality of ventilation holes 523 are formed in each of the fixed block 521 and the rotary block 522 on the side close to each other, and the ventilation holes 523 of the fixed block 521 and the ventilation holes 523 of the rotary block 522 are in one-to-one correspondence.
Referring to fig. 1 and 4, the fixed block 521 is in communication with the air supply bottle 51 via a pipe, and the rotary block 522 is in communication with all of the support pipes 31 and all of the auxiliary shower heads 6 via a pipe.
Referring to fig. 2, the switch assembly 7 includes a gear 71, a first row Cheng Chitiao and a second stroke rack 73, the gear 71 is coaxially and fixedly connected to the rotating block 522, the first row Cheng Chitiao and the second stroke rack 73 are fixedly disposed on one side of the circuit breaker trolley 2 close to the gear 71 and are arranged along the sliding direction of the circuit breaker trolley 2, the first row Cheng Chitiao is located on one side of the circuit breaker trolley 2 close to the fixed contact 12, and the second stroke rack 73 is located on one side of the circuit breaker trolley 2 far from the fixed contact 12.
Referring to fig. 2 and 6, when the circuit breaker trolley 2 slides into the circuit breaker chamber 11, the first row Cheng Chitiao is engaged with the gear 71 first, the vent hole 523 of the rotation block 522 is in a facing state with the vent hole 523 of the fixed block 521 after the engagement transmission, the second stroke rack 73 is engaged with the gear 71 after the engagement transmission, and the vent hole 523 of the rotation block 522 is in a dislocated state with the vent hole 523 of the fixed block 521 after the engagement transmission.
Referring to fig. 2, when the first row Cheng Chitiao 72 is engaged with the gear 71, the moving contact 21 and the fixed contact 12 are positioned at a distance just enough to generate an arc; when the second stroke rack 73 is meshed with the gear 71, the moving contact 21 is just inserted into the fixed contact 12.
When the circuit breaker handcart 2 slides into the circuit breaker cavity 11 until the first row Cheng Chitiao is meshed with the gear 71 for transmission, the gear 71 drives the rotating block 522 to rotate, the vent holes 523 of the rotating block 522 are opposite to the vent holes 523 of the fixed block 521, liquid nitrogen in the air supply bottle 51 is introduced to the main spray head 4 and the auxiliary spray head 6 through the fixed block 521 and the rotating block 522, so that nitrogen is sprayed from the main spray head 4 and is sprayed from the two split nozzles 61, the nitrogen sprayed from the main spray head 4 drives the sliding plate 311 to rotate, so that nitrogen in the support frame 3 is stirred, part of nitrogen sprayed from the split nozzles 61 is sprayed along the sliding direction of the moving contact 21, a barrier for obstructing dissipation is formed for the nitrogen in the support frame 3, a stable nitrogen gas column is formed between the support frames 3, and an arc is not easy to generate between the moving contact 21 and the fixed contact 12.
When the moving contact 21 is inserted into the fixed contact 12, the second stroke rack 73 drives the gear 71 to rotate, the gear 71 drives the rotating block 522 to rotate, and the vent holes 523 of the rotating block 522 are dislocated with the vent holes 523 of the fixed block 521, so that the main spray head 4 and the auxiliary spray head 6 stop spraying nitrogen, and the nitrogen between the moving contact 21 and the fixed contact 12 is conveniently sprayed according to the stroke control of the moving contact 21.
Referring to fig. 1, a recovery assembly 8 is arranged on a centrally installed switchgear body 1, the recovery assembly 8 comprises a collection nozzle 81, a compressor 82 and a recovery bottle 83, the collection nozzle 81 is rectangular, the bottom of the collection nozzle 81 is in an opening shape, the bottom of the collection nozzle 81 is in a flaring shape along a vertical downward direction, and the top of the collection nozzle 81 is fixedly connected with the top end of a breaker cavity 11; the top end of the collecting nozzle 81 is communicated with an air inlet of a compressor 82 through a pipeline, and the compressor 82 is fixedly arranged on the outer side wall of the centrally-installed switchgear body 1 and is positioned on the same side of the centrally-installed switchgear body 1 as the air supply bottle 51; the gas outlet of the compressor 82 is communicated with a recovery bottle 83 through a pipeline, the recovery bottle 83 is fixedly arranged on the outer side wall of the centrally installed switchgear body 1 and is located on the same side of the centrally installed switchgear body 1 with the compressor 82, and the recovery bottle 83 is located between the compressor 82 and the gas supply bottle 51.
When the nitrogen recycling device is used, the nitrogen of the mixed air is introduced into the compressor 82 through the collecting nozzle 81, the nitrogen of the mixed air is compressed through the compressor 82 and is introduced into the recycling bottle 83, so that the nitrogen is convenient to recycle, and the nitrogen can be recycled.
The implementation principle of the arc extinguishing device of the handcart contact of the 10KV centrally installed switchgear is as follows: when the circuit breaker handcart 2 is used, the circuit breaker handcart 2 slides into the circuit breaker cavity 11, the first row Cheng Chitiao drives the gear 71 to rotate, the gear 71 drives the rotating block 522 to rotate, the vent holes 523 of the rotating block 522 are opposite to the vent holes 523 of the fixed block 521, nitrogen in the air supply bottle 51 is introduced into the main spray head 4 and the auxiliary spray head 6 through the fixed block 521 and the rotating block 522, the nitrogen is sprayed out from the main spray head 4 and the auxiliary spray head 6, the nitrogen sprayed out from the main spray head 4 drives the sliding plate 311 to rotate, nitrogen in the support frame 3 is stirred, the nitrogen is sprayed out from the two split nozzles 61 of the auxiliary spray head 6, part of nitrogen sprayed out from the split nozzles 61 forms a barrier for obstructing nitrogen from escaping at the edge of the support frame 3, a stable nitrogen gas column is formed between the moving contact 21 and the fixed contact 12, and an arc is not easy to generate between the moving contact 21 and the fixed contact 12.
After the moving contact 21 is inserted into the fixed contact 12, the second stroke rack 73 drives the gear 71 to rotate, the gear 71 drives the rotating block 522 to rotate, and the vent holes 523 of the rotating block 522 and the vent holes 523 of the fixed block 521 are dislocated, so that the main spray head 4 and the auxiliary spray head 6 are interrupted to spray nitrogen, the spraying of the nitrogen is easy to control along with the stroke of the moving contact 21, and the nitrogen is introduced between the moving contact 21 and the fixed contact 12 according to the stroke of the moving contact 21, so that electric arcs are not easy to generate between the moving contact 21 and the fixed contact 12, and the moving contact 21 and the fixed contact 12 are not easy to generate heat and blacken.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. The utility model provides an arc extinguishing device of cabinet handcart contact is put to 10KV, is put cabinet body (1) and circuit breaker handcart (2) in including, put and offered circuit breaker chamber (11) on cabinet body (1) in, be provided with stationary contact (12) in circuit breaker chamber (11), circuit breaker handcart (2) sliding connection is in circuit breaker chamber (11), and be used for inserting through circuit breaker fixedly connected with moving contact (21) of stationary contact (12), its characterized in that: the static contact (12) is towards being close to the direction of moving contact (21) is outstanding the lateral wall in circuit breaker chamber (11), the cover is equipped with fixed connection on static contact (12) and is in on the lateral wall in circuit breaker chamber (11) and support frame (3) that can stretch out and draw back, support frame (3) are also used for the cover to be established on moving contact (21), and stretch out and draw back the direction along the slip direction of moving contact (21), fixedly connected with is used for promoting on moving contact (21) support frame (3) flexible push pedal (22), be provided with a plurality of main shower nozzles (4) on support frame (3), a plurality of main shower nozzles (4) all are towards the inside of support frame (3), all main shower nozzle (4) communicate jointly and have air feed assembly (5), air feed assembly (5) are used for to main shower nozzle (4) supply arc extinguishing gas.
2. The arc extinguishing device of a 10KV centrally installed switchgear handcart contact according to claim 1, wherein the arc extinguishing device comprises: the support frame (3) comprises support tubes (31) and connecting frames (32), wherein the support tubes (31) are arranged in a plurality of ways, the moving contacts (21) are arranged in the sliding direction, the connecting frames (32) are diamond frames, all connecting points are hinged, the connecting frames (32) are provided with a plurality of groups and are respectively located between the support tubes (31), the connecting frames (32) of each group are provided with a plurality of groups, all the connecting frames (32) in each group are arranged around the circumference of the support tubes (31), two connecting points opposite to each other of the connecting frames (32) are respectively hinged to two adjacent support tubes (31), and the main spray heads (4) are connected to the support tubes (31) and are communicated with the air supply assembly (5).
3. The arc extinguishing device of a 10KV centrally installed switchgear handcart contact according to claim 2, wherein the arc extinguishing device is characterized in that: a spring (321) is fixedly arranged between two connection points of the connecting frame (32) opposite to each other along the circumferential direction of the supporting tube (31), and the spring (321) is used for driving the connecting frame (32) to deform along the sliding direction of the moving contact (21).
4. The arc extinguishing device of a 10KV centrally installed switchgear handcart contact according to claim 2, wherein the arc extinguishing device is characterized in that: the inside of stay tube (31) is the opening form, the inboard opening part rotation of stay tube (31) is connected with annular sliding plate (311), main shower nozzle (4) be provided with the multiunit, and with stay tube (31) one-to-one, every group main shower nozzle (4) all are provided with a plurality of, every group is all main shower nozzle (4) all communicate on sliding plate (311), and around the circumference equipartition setting of sliding plate (311), main shower nozzle (4) are followed moving contact (21) gliding direction orientation is towards deviating from the slope of stay tube (31) diameter sets up.
5. The arc extinguishing device of a 10KV centrally installed switchgear handcart contact according to claim 2, wherein the arc extinguishing device is characterized in that: the utility model discloses a movable contact, including support tube (31) circumference, link (32) are followed two tie points of support tube (31) circumference are all fixedly connected with auxiliary sprinkler head (6), auxiliary sprinkler head (6) orientation inside support frame (3), auxiliary sprinkler head (6) are close to inside one end intercommunication of support frame (3) has two reposition of redundant personnel mouths (61), two reposition of redundant personnel mouths (61) are followed the slip direction of movable contact (21) is arranged, and along the direction slope setting of keeping away from each other, auxiliary sprinkler head (6) with air feed assembly (5) intercommunication.
6. The arc extinguishing device of the handcart contact of the 10KV centrally installed switchgear according to claim 5, wherein the arc extinguishing device is characterized in that: two shunt nozzles (61) are flexibly connected with the auxiliary spray head (6), two shunt nozzles (61) are provided with two adjusting rods (62) in a crossing way between two rods, which are close to the shunt nozzles (61), of the connecting frame (32), the middle parts of the two adjusting rods (62) are hinged, and the two ends of the adjusting rods (62) are respectively hinged with the shunt nozzles (61) and the rods of the connecting frame (32).
7. The arc extinguishing device of the handcart contact of the 10KV centrally installed switchgear according to claim 5, wherein the arc extinguishing device is characterized in that: the air feed assembly (5) comprises an air feed bottle (51) and a switch block (52), the air feed bottle (51) is communicated with the switch block (52) through a pipeline, the switch block (52) is communicated with the main spray head (4) and the auxiliary spray head (6) through a hose, liquid nitrogen is filled in the air feed bottle (51) and is fixedly connected to the outer side wall of the centrally installed switchgear body (1), and the switch block (52) is fixedly arranged in the breaker cavity (11) and is used for controlling the air feed bottle (51) and the main spray head (4) to be connected with the auxiliary spray head (6) according to the moving stroke of the breaker handcart (2).
8. The arc extinguishing device of the handcart contact of the 10KV centrally installed switchgear according to claim 7, wherein the arc extinguishing device comprises the following components: the switch block (52) comprises a fixed block (521) and a rotating block (522), the fixed block (521) is fixedly arranged in the circuit breaker cavity (11), the rotating block (522) is rotationally connected to the fixed block (521), the fixed block (521) and the rotating block (522) are in hollow states, vent holes (523) are formed in one sides, close to each other, of the fixed block (521) and the rotating block (522), the vent holes (523) of the fixed block (521) are in one-to-one correspondence with the vent holes (523) of the rotating block (522), the air supply bottle (51) is communicated with the inside of the fixed block (521) through a pipeline, the rotating block (522) is communicated with the main spray head (4) and the auxiliary spray head (6) through a hose, a switch assembly (7) is arranged in the circuit breaker cavity (11), and the switch assembly (7) is used for driving the rotating block (522) to be communicated with the fixed block (521) or the circuit breaker (521) in the sliding process of the circuit breaker handcart (2).
9. The arc extinguishing device of a 10KV centrally installed switchgear handcart contact, according to claim 8, is characterized in that: the switch assembly (7) comprises a gear (71), a first row Cheng Chitiao (72) and a second stroke rack (73), wherein the gear (71) is fixedly connected with the rotating block (522) coaxially, the first row Cheng Chitiao (72) and the second stroke rack (73) are fixedly connected to the circuit breaker handcart (2) along the sliding direction of the circuit breaker handcart (2), the gear (71) is used for being meshed with the first row Cheng Chitiao (72) and the second stroke rack (73), in the process that the circuit breaker handcart (2) slides into the circuit breaker cavity (11), the first row Cheng Chitiao (72) is used for enabling the vent hole (523) of the rotating block (522) to be in a dead-facing position with the vent hole (523) of the fixed block (521), and the second stroke rack (73) is used for enabling the vent hole (523) of the rotating block (522) to be in a dislocation state with the vent hole (523) of the fixed block (521).
10. The arc extinguishing device of a 10KV centrally installed switchgear handcart contact according to claim 1, wherein the arc extinguishing device comprises: the top of support frame (3) is provided with and collects mouth (81), it has compressor (82) to collect mouth (81) through the pipeline intercommunication, compressor (82) have recovery bottle (83) through the pipeline intercommunication, collect mouth (81) with the top fixed connection of circuit breaker chamber (11), compressor (82) recovery bottle (83) all fixed connection is in on the lateral wall of centrally installed switchgear body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310430548.9A CN116168990B (en) | 2023-04-21 | 2023-04-21 | Arc extinguishing device for handcart contact of 10KV centrally installed switchgear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310430548.9A CN116168990B (en) | 2023-04-21 | 2023-04-21 | Arc extinguishing device for handcart contact of 10KV centrally installed switchgear |
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| CN116168990B CN116168990B (en) | 2023-07-07 |
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| CN113764986A (en) * | 2021-07-06 | 2021-12-07 | 国网河南省电力公司信阳供电公司 | Armored open type indoor alternating current metal-enclosed switchgear |
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| US5036427A (en) * | 1989-08-16 | 1991-07-30 | Square D Company | Drawout circuit breaker apparatus |
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| CN116168990B (en) | 2023-07-07 |
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