CN108767726B - 40.5kV switchgear system - Google Patents
40.5kV switchgear system Download PDFInfo
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- CN108767726B CN108767726B CN201810842867.XA CN201810842867A CN108767726B CN 108767726 B CN108767726 B CN 108767726B CN 201810842867 A CN201810842867 A CN 201810842867A CN 108767726 B CN108767726 B CN 108767726B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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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
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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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
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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
- H02B11/28—Earthing arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a 40.5kV switchgear system, which comprises a switch cabinet, wherein the switch cabinet is divided into an instrument room, a handcart room, a feeder room and a bus room, the feeder room is arranged above the bus room, the handcart room is arranged on the left sides of the feeder room and the bus room, the instrument room is arranged at the left upper corner of the handcart room, a circuit breaker assembly is arranged in the handcart room, an upper conductive joint on the circuit breaker assembly is connected with an upper contact box type current transformer outlet arranged in the feeder room, and an inlet of the upper contact box type current transformer is connected with an upper branch bus joint through a grounding switch; the lower conductive connector on the breaker assembly is connected with a lower contact box type current transformer outlet arranged in the bus chamber, and the inlet of the lower contact box type current transformer is connected with a lower branch bus connector; the breaker assembly comprises a frame, a vacuum arc-extinguishing chamber, an operating mechanism, a connecting insulation pull rod and an insulation support rod.
Description
Technical Field
The invention relates to the technical field of high-voltage switchgear, in particular to a 40.5kV switchgear system.
Background
The switchgear cabinet body is used for placing switchgear, and mechanical strength of the switchgear cabinet body among the prior art is poor, and because the magnetic circuit of magnetic field is produced when main generating line is led to the through-flow, leads to eddy current loss great, and the security of switchgear operation is relatively poor moreover. The 40.5kV switch installed in the plateau environment has higher requirements on the insulation performance of equipment, and needs more reasonable layout. The current transformer is not reasonable enough in setting position, and most of the current transformers in the prior art are arranged on the cabinet body, however, the space in the cabinet body is limited, and the installation of the current transformers can compress the space in the cabinet to cause other electric appliance element installation space to be relatively limited.
In the existing insulated switchgear, in order to enable the vacuum circuit breaker to conveniently achieve the pushing-in and pulling-out functions (pushing-in means pushing-in from a test position to a working position, pulling-out means pulling-out from the working position to the test position), a chassis is generally used to carry the vacuum circuit breaker, and a travelling wheel mounted on the chassis is used to move forward or backward on a track in the switchgear. In order to realize the movement of the chassis truck in the switch cabinet, a screw rod can be arranged on the chassis truck, a screw nut fixed on the chassis frame is sleeved on the screw rod, the end part of the screw rod is sleeved on the handle, and the screw rod is rotated, so that the screw nut drives the chassis frame to move back and forth, and the propulsion and the withdrawal of the breaker chassis truck are realized.
Because the bounce of the contact during opening and closing of the circuit breaker seriously affects the opening and closing performance of the circuit breaker, the factors affecting the bounce of the opening and closing of the circuit breaker mainly include: the mass, speed, contact pressure of the moving parts, and the rigidity of the insulated pull rod. The whole insulating pull rod used at present is rigid, and a contact rigidly connected with the insulating pull rod can generate larger-amplitude bouncing at the moment of opening and closing, so that the opening and closing performance of the circuit breaker is seriously affected.
Because the circuit breaker generates discharge and mainly concentrates at the moment of opening and closing the arc extinguishing chamber, the insulating pull rod is easy to be in insulation failure at the moment of opening and closing the arc extinguishing chamber of the circuit breaker, so that safety accidents occur. In particular to a special plateau environment, and has higher requirements on the insulation performance of the circuit breaker.
In addition, the length of the existing insulating pull rod can be adjusted according to the actual installation and debugging requirements, the length can be adjusted in some ways, and when the insulating pull rod cannot be locked and the connector cannot be locked relatively, the length of the insulating pull rod can be changed in the operation process, so that effective control of the arc extinguishing chamber is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provide a 40.5kV switchgear system, solve the problems of space waste, inconvenient installation and poor insulation effect caused by unreasonable arrangement of various switchgear in limited space in a cabinet body,
in addition, the problem that the insulation pull rod is easy to be in insulation failure at the moment of opening and closing the arc extinguishing chamber of the circuit breaker, so that safety accidents occur is solved. And solve current insulating pull rod though have length adjustment function, when adjusting the extension through the lead screw, but the unable locking of length makes insulating pull rod in the use easily, insulating pull rod can appear length variation to influence the effective control problem to the explosion chamber.
The invention is realized by the following technical scheme:
the 40.5kV switchgear system comprises a switch cabinet, wherein the switch cabinet is divided into an instrument room, a handcart room, a feeder room and a bus room, the feeder room is arranged above the bus room, the handcart room is arranged on the left sides of the feeder room and the bus room, the instrument room is arranged at the upper left corner of the handcart room, a circuit breaker assembly is arranged in the handcart room, an upper conductive connector on the circuit breaker assembly is connected with an upper contact box type current transformer outlet arranged in the feeder room, and an inlet of the upper contact box type current transformer is connected with an upper branch bus connector through a grounding switch;
the lower conductive connector on the breaker assembly is connected with a lower contact box type current transformer outlet arranged in the bus chamber, and the inlet of the lower contact box type current transformer is connected with a lower branch bus connector;
the circuit breaker assembly comprises a frame, a vacuum arc-extinguishing chamber, an operating mechanism, a connecting insulation pull rod and an insulation support rod, wherein an upper layer insulator and a lower layer insulator are fixedly arranged on a vertical frame of the frame, the upper end of the vacuum arc-extinguishing chamber is connected with the insulator positioned on the upper layer through an upper wire outlet seat, the lower end of the vacuum arc-extinguishing chamber is connected with the insulator positioned on the lower layer through a lower wire outlet seat, the operating mechanism is arranged in the vertical frame of the frame, and the operating mechanism is in transmission connection with a movable conducting rod of the vacuum arc-extinguishing chamber through the connecting insulation pull rod; the upper wire outlet seat is fixedly connected with the lower wire outlet seat through an insulating stay bar.
The upper contact box type current transformer of the 40.5-high-voltage type switching equipment is arranged between the upper contact of a circuit breaker and a feeder chamber, and is reasonable in layout. The feeder chamber is located the cabinet body rear top, and earthing switch sets up in the feeder chamber, and space utilization is high. The novel plateau type circuit breaker is used, and the circuit breaker is provided with the insulating pull rod and the insulating support rod, so that the insulating performance of the circuit breaker is improved, and the creepage distance is increased. And each phase of branch bus is sleeved with a silicone rubber bus sleeve, so that the surrounding electric field is optimized, and discharge is not easy to generate. The partition plate and the element mounting plate through which the current passes are made of non-magnetic stainless steel materials, so that the generation of vortex phenomenon can be prevented, and the influence of overheating of the cabinet body on the operation safety of equipment is avoided.
Further, the connecting insulation pull rod comprises a connecting insulation pull rod body, a first connector and a second connector, wherein the first connector is in threaded connection with one end of the connecting insulation pull rod body, the other end of the connecting insulation pull rod body is a sleeve connector, a threaded connector is arranged at the bottom end of the sleeve connector, and an adjusting umbrella skirt sleeve is arranged outside the sleeve connector; the second connector comprises an inner end connector and an outer end connector, one end of the inner end connector is provided with a threaded adjusting connector which is mutually matched and connected with the threaded connector, and the other end of the inner end connector is elastically connected with the outer end connector in a telescopic manner;
the outer end part of the outer end connector is sleeved with a movable adjusting disc, a plurality of movable adjusting rods are arranged on the movable adjusting disc in a surrounding mode, adjusting holes are formed in sleeve connectors corresponding to the adjustable umbrella skirt sleeves and correspond to the movable adjusting rods, the movable adjusting rods penetrate through the adjusting holes, triangular support rod frame devices are symmetrically arranged at the outer ends of the movable adjusting rods, and port sealing caps are arranged on ports of the sleeve connectors.
Further, the inner connector other end is equipped with the connecting sleeve, and the bottom in the connecting sleeve is equipped with spline sleeve section, outer end connector is the shaft-like structure, and outer end connector one end is equipped with the integral key shaft section that matches with spline sleeve section, the outer end connector other end is equipped with the linkage joint, and the outer end connector inserts through the integral key shaft section and establishes in the spline sleeve section, installs first spring between spline shaft section inboard and connecting sleeve bottom, and the cover is equipped with the second spring on the outer end connector in the integral key shaft section outside, installs the screw thread closing cap through at the connecting sleeve port and seals the second spring in the connecting sleeve.
Further, the upper wire outlet seat is connected with an upper conductive joint, and the lower wire outlet seat is connected with a lower conductive joint; and the upper wire outlet seat and the lower wire outlet seat are respectively provided with an insulating cover.
Further, the insulation stay bar comprises an insulation stay bar body, and the upper end and the lower end of the insulation stay bar body are respectively provided with a high staggered umbrella skirt.
Further, the triangular support rod frame device comprises an upper support rod, a lower support rod and a sliding connecting block, wherein the bottom end of the upper support rod is hinged to the sliding connecting block, the upper end of the lower support rod is hinged to the sliding connecting block, and the sliding connecting block is in sliding connection with the outer end part of the movable adjusting rod; the upper end of the upper supporting rod is provided with an arc supporting block.
Further, a third spring is sleeved on the second connector at the inner side of the movable adjusting disc, and a fourth spring is sleeved on the second connector at the outer side of the movable adjusting disc.
Further, the square rod section is arranged on the outer end connector corresponding to the installation of the port sealing cap, the square hole is matched with the square rod section by the port sealing cap, and the outer ring surface of the port sealing cap is connected to the port surface of the sleeve connector through bolts.
Further, the lower end of the movable adjusting rod is movably arranged on the movable adjusting disc; the ring surface of the connecting insulating pull rod body is provided with a plurality of umbrella skirts.
Furthermore, a dehumidifying device is arranged in the bus chamber.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the upper contact box type current transformer of the 40.5-high-voltage type switching equipment is arranged between the upper contact of a circuit breaker and a feeder chamber, and is reasonable in layout. The feeder chamber is located the cabinet body rear top, and earthing switch sets up in the feeder chamber, and space utilization is high. The novel plateau type circuit breaker is used, and the circuit breaker is provided with the insulating pull rod and the insulating support rod, so that the insulating performance of the circuit breaker is improved, and the creepage distance is increased. And each phase of branch bus is sleeved with a silicone rubber bus sleeve, so that the surrounding electric field is optimized, and discharge is not easy to generate. The partition plate and the element mounting plate through which the current passes are made of non-magnetic stainless steel materials, so that the generation of vortex phenomenon can be prevented, and the influence of overheating of the cabinet body on the operation safety of equipment is avoided.
2. According to the 40.5kV switchgear system, the insulation function is improved on the vacuum arc-extinguishing chamber, the connecting insulation pull rod and the insulation support rod so as to be suitable for a plateau environment, and the silicon rubber is arranged on the surface of the vacuum arc-extinguishing chamber, so that the insulation performance of the circuit breaker is improved, and the creepage distance of the circuit breaker is increased. The circuit breaker has strong self-cleaning capability, and avoids dust accumulation and influences the insulation performance. The performance of the circuit breaker meets the use requirements of high-altitude areas.
3. According to the 40.5kV switchgear system, the second connector connected with the insulation pull rod is designed to be of a telescopic structure, the whole insulation pull rod is of an elastic tensioning structure, and the contact rigidly connected with the insulation pull rod at the moment of opening and closing is prevented from bouncing to a large extent, so that the breaking performance of the circuit breaker is less affected.
4. According to the 40.5kV switchgear system, the second connector is designed into a telescopic structure, the outer end connector on the second connector stretches relative to the inner end connector in the telescopic process, the movable adjusting disc on the outer end connector moves synchronously, and the movable adjusting disc is circumferentially provided with a plurality of movable adjusting rods which also synchronously pull the triangular support devices on the reverse side of the inner end connector to open, so that the adjustable umbrella skirt sleeve opens instantly to increase the climbing distance; the problem of insulating pull rod at the explosion chamber disconnection and closure instant of circuit breaker, insulating pull rod insulation failure easily leads to the incident emergence is solved.
5. According to the 40.5kV switchgear system, the port sealing cap piece connected with the insulating pull rod is provided with the square rod section on the corresponding outer end connector, the port sealing cap piece is matched with the square rod section to form the square hole, and the outer ring surface of the port sealing cap piece is connected to the port surface of the sleeve joint through the bolt, so that the second connector can only do telescopic motion in the sleeve joint and cannot do rotary motion, and the insulating pull rod cannot change in length in the use process, so that effective control of an arc extinguishing chamber is affected.
6. According to the 40.5kV switchgear system, the second connector is connected with the connecting insulation pull rod body through the threaded adjusting connector which is mutually matched and connected through the threaded interface, so that the installation length of the second connector can be adjusted, and the whole length of the insulation pull rod of the circuit breaker can be adjusted conveniently according to different installation conditions; the second connector is connected with the connecting insulating pull rod body through two positions, one is connected with the threaded interface and the threaded adjusting joint, and the other is in limiting connection between the movable adjusting disc and the port sealing cap piece, so that the tensile strength of the structural relation that the insulating pull rod of the existing circuit breaker can only be connected at one position is greatly improved, and the use quality of the insulating pull rod of the circuit breaker is improved.
7. According to the 40.5kV switchgear system, the upper end and the lower end of the insulating support rod body of the insulating support rod are respectively provided with the height staggered umbrella skirts; the height staggered umbrella skirt can increase the climbing distance of the insulating stay bar, and the height staggered umbrella skirt is respectively arranged at the upper end part and the lower end part, so that the middle part of the insulating stay bar is prevented from being close to the protruding part distance of the middle part of the vacuum arc-extinguishing chamber, and the insulation failure of the umbrella skirt is caused.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of a front view of a 40.5kV switchgear system of the present invention;
FIG. 2 is a schematic side view of a 40.5kV switchgear system;
fig. 3 is a schematic side view of a circuit breaker assembly of the present invention;
fig. 4 is a schematic diagram of a front view of a circuit breaker assembly of the present invention;
FIG. 5 is a schematic view of the structure of the connecting insulating tie rod of the present invention;
fig. 6 is a schematic structural view of a second connector according to the present invention;
FIG. 7 is a schematic view of the inner end connector of the present invention;
FIG. 8 is a schematic view of the outer connector of the present invention;
FIG. 9 is a schematic view of the configuration of the three-gusset bar frame assembly of the present invention in cooperation with an adjustment shed cover;
in the drawings, the reference numerals and corresponding part names: 1-connecting an insulating pull rod body, 2-a first connector and 3-a second connector; 4-sleeve joints, 5-threaded joints and 6-adjusting umbrella skirt sleeves; 7-inner end connectors, 8-outer end connectors and 9-thread adjusting connectors; 10-connecting sleeve, 11-spline sleeve section, 12-spline shaft section; 13-linkage joint, 14-first spring, 15-second spring; 16-screw cap, 17-moving adjusting disk, 18-moving adjusting rod; 19-adjusting holes, 20-triangular support rod frame devices and 21-port sealing caps; 22-upper stay bars, 23-lower stay bars and 24-sliding connection blocks; 25-arc-shaped supporting blocks, 26-third springs and 27-fourth springs; 28-square pole section, 29-bolt and 30-umbrella skirt; 31-a frame, 32-a vacuum arc-extinguishing chamber and 33-an operating mechanism; 34-connecting an insulating pull rod, 35-insulating support rods and 36-vertical frames; 37-insulators, 38-upper wire outlet seats and 39-lower wire outlet seats; 40-upper conductive connector, 41-lower conductive connector and 42-insulating support rod body; 43-height staggered umbrella skirts, 44-insulating covers, 45-switch cabinets, 46-instrument rooms, 47-handcart rooms, 48-feeder rooms, 49-bus rooms, 50-upper contact box type current transformers, 51-grounding switches, 52-upper branch bus connectors, 53-lower contact box type current transformers, 54-lower branch bus connectors, 55-dehumidifying devices, 56-middle partition boards and 57-bus room partition boards.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Examples
As shown in fig. 1-9, the 40.5kV switchgear system of the present invention comprises a switchgear 45, the switchgear 45 is divided into an instrument room 46, a handcart room 47, a feeder room 48 and a bus room 49, the feeder room 48 is arranged above the bus room 49, the handcart room 47 is arranged at the left side of the feeder room 48 and the bus room 49, the instrument room 46 is arranged at the left upper corner of the handcart room 47, a circuit breaker assembly is arranged in the handcart room 47, an upper conductive connector 40 on the circuit breaker assembly is connected with an outlet of an upper contact box type current transformer 50 arranged in the feeder room 48, and an inlet of the upper contact box type current transformer 50 is connected with an upper branch bus connector 52 through a grounding switch 51; the lower conductive contact 41 of the breaker assembly is connected to the outlet of a lower contact box current transformer 53 provided in the busbar chamber 49, and the inlet of the lower contact box current transformer 53 is connected to a lower branch busbar contact 54.
The upper contact box type current transformer 50, the upper branch bus connector 52 and the grounding switch 51 are arranged in the feeder chamber, and the upper branch bus connector 52 is arranged at the top of the feeder chamber 48 through an outlet sleeve mounting plate; a lower contact box type current transformer 53, a lower branch bus connector 54 (comprising a main bus and a lower branch bus), an insulating sleeve for installing the lower branch bus connector 54, and a dehumidifying device 55 are arranged in the bus chamber 49, and a bus sleeve installing plate is arranged on the side wall of the bus chamber 49 for installing the lower branch bus connector 54; the circuit breaker is mounted on a circuit breaker cart which is movable pushed into the cart compartment 47; the instrument room 46 is located at the front top of the switch cabinet 45.
The grounding switch 51 is fixed on a middle partition plate 56 of the switch cabinet 45, the upper and lower contact box-type current transformers 50 and 53 respectively penetrate through the middle partition plate 56 of the cabinet body and are fixed on the middle partition plate 56 of the cabinet body, the bus chamber partition plate 57 supports the upper and lower contact box-type current transformers 50 and 53, upper and lower fixed contacts are respectively arranged on the upper and lower contact box-type current transformers 50 and 53, phases in the upper fixed contact are correspondingly connected with the grounding switch 51 through flexible connection, each phase upper branch bus fed from the grounding switch 51 penetrates through a corresponding phase outlet sleeve, the outlet sleeve is arranged at the top of the feeder chamber 48, and the outlet sleeve mounting plate is arranged at the top of the feeder chamber 48; compared with the feeder chamber 48 arranged below the bus chamber 49 to the right, the invention arranges the feeder chamber 48 and the matched upper branch bus connector 52 above, thereby facilitating the installation and wiring of the integral switch and effectively saving the occupied space of the switch cabinet 45.
The circuit breaker handcart enters the cabinet body, after the circuit breaker is opened, the circuit breaker handcart can move back and forth between a test position and a working position in the cabinet, and after the circuit breaker is closed at the working position, the circuit breaker handcart can be electrified; one end of each phase of lower branch bus is connected with the lower fixed contact of the corresponding phase, the other end of each phase of lower branch bus is connected to the main bus of the corresponding phase, and the main bus penetrates into the adjacent switchgear cabinet body through a bus sleeve arranged on a cabinet body bus sleeve mounting plate; the instrument room is positioned at the front top of the cabinet body, and is internally provided with a low-voltage secondary control element for monitoring the state of each primary element in the switch equipment. The upper branch bus, the lower branch bus and the flexible connection are all sleeved with insulating sleeves. The bus bar bushing mounting plate, the outlet bushing mounting plate, the middle partition 56, and the bus bar chamber partition 57 are made of a stainless steel plate that is non-magnetic.
After the circuit breaker handcart is in a working position in the cabinet and the circuit breaker is switched on, three-phase power is led into the switch equipment from any adjacent side switch equipment through each phase bus sleeve, each phase is respectively overlapped to a lower fixed contact in the lower contact box type current transformer 53 by a lower branch bus, led to an upper fixed contact in the upper contact box type current transformer 50 through a conductive part of a circuit breaker pole, grounded switch 51 and an upper branch bus, and finally is fed out by an outgoing line sleeve to supply power to the next stage of load. The components disposed within the meter chamber 46 are used to monitor and operate the status of the various primary components within the control switching device.
As shown in fig. 3 to 4, the circuit breaker assembly comprises a frame 31, a vacuum interrupter 32, an operating mechanism 33, a connecting insulating pull rod 34 and an insulating support rod 35, wherein an upper layer insulator 37 and a lower layer insulator 37 are fixedly arranged on a vertical frame 36 of the frame 31, the frame 31 comprises the vertical frame 36 and a chassis, and in order to enable the vacuum circuit breaker to conveniently realize the pushing-in and pulling-out functions (pushing-in means pushing-in from a test position to a working position and pulling-out means pulling-out from the working position to the test position), the chassis is adopted to bear the vacuum circuit breaker, and the chassis is adopted to move forward or backward on a track in a switch cabinet through a travelling wheel mounted on the chassis. The upper end of the vacuum arc-extinguishing chamber 32 is connected with an insulator 37 positioned at the upper layer through an upper wire outlet seat 38, the lower end of the vacuum arc-extinguishing chamber 32 is connected with the insulator 37 positioned at the lower layer through a lower wire outlet seat 39, three sets of vacuum arc-extinguishing chambers 32 or four sets of vacuum arc-extinguishing chambers 32 are generally arranged on one set of frame 31 according to different electric phases, the operating mechanism 33 is arranged in a vertical frame 36 of the frame 31, and the operating mechanism 33 is in transmission connection with a movable conducting rod of the vacuum arc-extinguishing chamber 32 through a connecting insulation pull rod 34; the upper wire outlet seat 38 and the lower wire outlet seat 39 are fixedly connected through an insulating stay bar 35. The vacuum interrupter 32 includes a fixed conductive rod, a fixed run arc surface, a fixed contact, a movable run arc surface, and a movable conductive rod that forms the conductive system of the interrupter. The fixed conducting rod, the fixed running cambered surface and the fixed contact are combined to measure the fixed electrode, the movable contact, the movable running cambered surface and the movable conducting rod are combined to measure the movable electrode, and when the vacuum circuit breaker assembled by the vacuum arc extinguishing chamber 32 and the vacuum load switch and the vacuum contactor are switched on, the operating mechanism 33 enables the two contacts to be closed through the movement of the movable conducting rod, so that the connection of a circuit is completed. In order to reduce the contact resistance between the two contacts as much as possible and maintain stability and good mechanical strength when the arc extinguishing chamber bears dynamic stable current, the vacuum switch is provided with a guide sleeve at one end of the dynamic conducting rod, and a set of compression springs are used to maintain a rated pressure between the two contacts. When the vacuum switch breaks the current, the two contacts of the arc extinguishing chamber are separated and generate an electric arc therebetween until the electric arc is extinguished when the current naturally crosses zero, thus completing the breaking of the circuit. The actuating mechanism 33 is a relatively mature mechanical transmission structure as a power structure of the circuit breaker, and the invention is not described in detail. The vacuum arc-extinguishing chamber is sleeved with silicon rubber.
The connecting insulation pull rod 34 comprises a connecting insulation pull rod body 1, a first connector 2 and a second connector 3, wherein the connecting insulation pull rod body 1 is made of PA66 reinforced nylon materials and glass fiber materials are added into the PA66 reinforced nylon materials, so that the toughness of the insulation pull rod is increased, the mechanical strength of the insulation pull rod is enhanced, the phenomenon of uneven electric field is effectively solved, the service life of the insulation pull rod is prolonged, and meanwhile, the weight of the insulation pull rod is reduced. The first connector 2 is connected with one end of the connecting insulating pull rod body 1 in a threaded manner, telescopic adjustment can be achieved between the first connector 2 and the connecting insulating pull rod body 1 during installation, the other end of the connecting insulating pull rod body 1 is a sleeve connector 4, a threaded connector 5 is arranged at the bottom end of the sleeve connector 4, and an adjusting umbrella skirt sleeve 6 is arranged outside the sleeve connector 4. The sleeve joint 4 can play an insulating protection role on the second connector 3. The adjusting umbrella skirt sleeve and the umbrella skirt are both made of silicon rubber.
The second connector 3 comprises an inner end connector 7 and an outer end connector 8, a threaded adjusting connector 9 which is mutually matched and connected with a threaded connector 5 is arranged at one end of the inner end connector 7, a connecting sleeve 10 is arranged at the other end of the inner end connector 7, a spline sleeve section 11 is arranged at the bottom end part in the connecting sleeve 10, the outer end connector 8 is of a rod-shaped structure, a spline shaft section 12 which is matched with the spline sleeve section 11 is arranged at one end of the outer end connector 8, a linkage part connector 13 is arranged at the other end of the outer end connector 8, the outer end connector 8 is inserted in the spline sleeve section 11 through the spline shaft section 12, a first spring 14 is arranged between the inner side of the spline shaft section 12 and the bottom of the connecting sleeve 10, a second spring 15 is sleeved on the outer end connector 8 at the outer side of the spline shaft section 12, a threaded sealing cap 16 is arranged at the port of the connecting sleeve 10, a plurality of moving adjusting rods 18 are arranged on the outer end part sleeve of the outer end connector 8 in a sleeved mode, a plurality of moving adjusting rods 18 are arranged on the moving adjusting rods 17 in a surrounding mode, adjusting rods 19 are arranged on the sleeve joints 4 corresponding to the moving adjusting umbrella skirt sleeves 6, a moving adjusting rod 19 corresponding to the moving adjusting rods 18 are arranged on the moving adjusting rods 19, a triangular joint 18 is arranged on a supporting rod end connector 20, and a supporting rod end opening 20 is arranged on the moving end of the supporting rod 20, and a symmetrical joint device is arranged at the end opening 20.
The invention is connected with the insulating pull rod 34, the second connector is designed into a telescopic structure, the whole insulating pull rod is of an elastic tensioning structure, and the contact rigidly connected with the insulating pull rod at the moment of opening and closing can avoid the generation of larger-amplitude bouncing, and the breaking performance of the circuit breaker is less affected; the second connector is designed into a telescopic structure, the outer end connector on the second connector stretches relative to the inner end connector in the telescopic process, the movable adjusting disc on the outer end connector synchronously moves, and a plurality of movable adjusting rods are arranged on the movable adjusting disc in a surrounding manner and synchronously pull the triangular support device on the reverse side of the inner end connector to open, so that the adjustable umbrella skirt sleeve is instantly opened to increase the climbing distance; the problem that the insulation pull rod is easy to fail in insulation at the moment of opening and closing the arc extinguishing chamber of the circuit breaker, so that safety accidents occur is solved;
the triangular support device 20 comprises an upper support rod 22, a lower support rod 23 and a sliding connection block 24, wherein the bottom end of the upper support rod 22 is hinged to the sliding connection block 24, the upper end of the lower support rod 23 is hinged to the sliding connection block 24, and the sliding connection block 24 is slidably connected to the outer end of the movable adjusting rod 18. The upper end of the upper stay bar 22 is provided with an arc-shaped stay block 25.
The arc-shaped supporting blocks 25 on the plurality of upper supporting rods 22 can be enclosed into a circular ring structure, so that the umbrella skirt cover 6 can be supported and regulated conveniently to be unfolded, and the electric climbing distance is increased. When the movement adjusting lever 18 moves to one side, the side tripod rest 20 expands (the angle between the upper stay 22 and the lower stay 23 increases) to support and adjust the umbrella cover 6, and the other side tripod rest 20 of the movement adjusting lever 18 contracts (the angle between the upper stay 22 and the lower stay 23 decreases) without pushing force. The slide connection block 24 can slide up and down on the outer end of the moving adjustment lever 18, and since the lower stay 23 is gradually vertical when the tripod apparatus 20 is spread, the slide connection block 24 is forced to move upward, otherwise the tripod apparatus 20 cannot be spread.
The second connector 3 on the inner side of the movable adjusting disc 17 is sleeved with a third spring 26, and the second connector 3 on the outer side of the movable adjusting disc 17 is sleeved with a fourth spring 27. The first spring 14, the second spring 15, the third spring 26 and the fourth spring 27 are all used for realizing telescopic reset of the second connector 3 in a matched mode, and the rigidity strength of the insulating rod is reduced.
The movable adjusting disc 17 is in threaded connection with the outer end connector 8. The movable adjusting disc 17 is designed into an adjusting structure, so that the movable adjusting disc 17 is convenient to be installed and connected in a matched mode, and the position of the movable adjusting disc 17 needs to be correspondingly installed with the adjustable umbrella skirt 6, and the third spring 26 and the fourth spring 27 also need to be elastically limited and blocked.
The square rod section 28 is arranged on the corresponding outer end connector 8 of the port sealing cap 21, square holes are formed in the cooperation of the port sealing cap 21 and the square rod section 28, and the outer ring surface of the port sealing cap 21 is connected to the port surface of the sleeve connector 4 through bolts 29. According to the 40.5kV switchgear system, the square rod section 28 is arranged on the outer end connector 8 corresponding to the port sealing cap 21, the square holes are formed in the way that the port sealing cap 21 is matched with the square rod section 28, and the outer annular surface of the port sealing cap 21 is connected to the port surface of the sleeve joint 4 through the bolts 29, so that the second connector can only stretch and retract in the sleeve joint and cannot do rotary motion, and the insulation pull rod cannot change in length in the use process, so that effective control of an arc extinguishing chamber is affected.
The lower end of the movable adjusting rod 18 is movably arranged on the movable adjusting disc 17. A plurality of umbrella skirts 30 are arranged on the ring surface of the connecting insulating pull rod body 1. The electrical creepage distance of the insulating rod in the static process can be increased by the plurality of umbrella skirts 30.
According to the method for increasing the climbing distance of the connecting insulation pull rod 34, when the arc extinguisher is closed, the second connector 3, the connecting insulation pull rod body 1 and the first connector 2 are sequentially conducted through propulsion power to enable the arc extinguisher to be closed, in the closing process of the arc extinguisher, the outer end connector 8 moves towards the inner end connector 7, the movable adjusting disc 17 on the outer end connector 8 synchronously moves towards the inner end connector 7, the movable adjusting disc 17 is circularly provided with a plurality of movable adjusting rods 18 to synchronously push the triangular support frame device 20 on the reverse side of the inner end connector 7 to be opened, and therefore the adjustable umbrella skirt sleeve 6 is opened instantly to increase the climbing distance.
When the arc extinguisher is disconnected, the second connector 3, the connecting insulating pull rod body 1 and the first connector 2 are sequentially connected through tensioning power conduction to disconnect the arc extinguisher, in the disconnection process of the arc extinguisher, the outer end connector 8 moves in the opposite direction relative to the inner end connector 7, the movable adjusting disc 17 on the outer end connector 8 synchronously moves in the opposite direction relative to the inner end connector 7, and the movable adjusting disc 17 is surrounded by a plurality of movable adjusting rods 18 to synchronously pull the triangular support frame device 20 on the opposite side of the inner end connector 7 to open, so that the adjustable umbrella skirt sleeve 6 is instantly opened to increase the climbing distance.
The second connector is designed into a telescopic structure, the outer end connector on the second connector stretches relative to the inner end connector, the movable adjusting disk on the outer end connector moves synchronously, a plurality of movable adjusting rods are arranged on the movable adjusting disk in a surrounding manner, and the triangular support device on the reverse side of the inner end connector is pulled to open synchronously, so that the adjustable umbrella skirt sleeve opens instantly to increase the climbing distance; the problem of insulating pull rod at the explosion chamber disconnection and closure instant of circuit breaker, insulating pull rod insulation failure easily leads to the incident emergence is solved.
The upper wire outlet seat 38 is connected with an upper conductive joint 40, and the lower wire outlet seat 39 is connected with a lower conductive joint 41. An insulating cover 44 is provided on both the upper outlet seat 38 and the lower outlet seat 39.
The insulating stay bar 35 comprises an insulating stay bar body 42, and upper and lower ends of the insulating stay bar body 42 are respectively provided with a high and low staggered umbrella skirt 43. The upper end and the lower end of the insulating support rod body of the insulating support rod are respectively provided with a high staggered umbrella skirt; the height staggered umbrella skirt can increase the climbing distance of the insulating stay bar, and the height staggered umbrella skirt is respectively arranged at the upper end part and the lower end part, so that the middle part of the insulating stay bar is prevented from being close to the protruding part distance of the middle part of the vacuum arc-extinguishing chamber, and the insulation failure of the umbrella skirt is caused.
The upper and lower three pieces of insulators 37 are fixed on the vertical frame 36 of the frame 31, the upper wire outlet seat 38 is connected with the insulator 37 at the upper end, the lower wire outlet seat 39 is connected with the insulator 37 at the lower end, the vacuum arc-extinguishing chamber 32 is arranged between the upper wire outlet seat 38 and the lower wire outlet seat 39, the insulating support rod 35 is supported between the upper wire outlet seat 38 and the lower wire outlet seat 39 to play a supporting and reinforcing role, the upper conductive joint 40 comprises an upper contact and an upper conductive rod, the upper contact is fixed on the upper conductive rod, the upper conductive rod is connected with the upper wire outlet seat 38, the conductive part at the lower end of the vacuum arc-extinguishing chamber 32 is connected with the lower conductive rod through a conductive plate, the lower conductive joint 41 comprises a lower conductive rod and a lower contact, the conductive plate simultaneously has a supporting role, and the vacuum arc-extinguishing chamber 32 is mechanically connected with the operating mechanism 33 through the connecting insulating pull rod 34; upper and lower insulating covers 44 are provided on the upper and lower outlet holders 38, 39, respectively.
The working process or the use mode.
After the circuit breaker handcart is pushed to the working position, the operating mechanism 33 drives the vacuum arc-extinguishing chamber 32 to switch on through connecting the insulating pull rod 34 and other devices, current is introduced through the upper contact, flows through the upper wire outlet seat 38, the upper conducting rod and the movable and static contacts in the inner cavity of the vacuum arc-extinguishing chamber 32, is fed out to a circuit or equipment through the conducting plate, the lower conducting rod and the lower contact, and acts after receiving a tripping command when encountering fault tripping or needing to overhaul the equipment, the operating mechanism 33 drives the vacuum arc-extinguishing chamber 32 to switch off through connecting the insulating pull rod 34 and other devices, so that the locking of the circuit breaker handcart can be released, and the circuit breaker handcart can be retracted to the test position to finish subsequent work.
The upper contact box type current transformer of the 40.5-high-voltage type switching equipment is arranged between the upper contact of a circuit breaker and a feeder chamber, and is reasonable in layout. The feeder chamber is located the cabinet body rear top, and earthing switch sets up in the feeder chamber, and space utilization is high. The novel plateau type circuit breaker is used, and the circuit breaker is provided with the insulating pull rod and the insulating support rod, so that the insulating performance of the circuit breaker is improved, and the creepage distance is increased. And each phase of branch bus is sleeved with a silicone rubber bus sleeve, so that the surrounding electric field is optimized, and discharge is not easy to generate. The partition plate and the element mounting plate through which the current passes are made of non-magnetic stainless steel materials, so that the generation of vortex phenomenon can be prevented, and the influence of overheating of the cabinet body on the operation safety of equipment is avoided.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. A 40.5kV switchgear system comprising a switchgear cabinet (45), characterized by: the switch cabinet (45) is divided into an instrument room (46), a handcart room (47), a feeder room (48) and a bus room (49), the feeder room (48) is arranged above the bus room (49), the handcart room (47) is arranged on the left sides of the feeder room (48) and the bus room (49), the instrument room (46) is arranged at the left upper corner of the handcart room (47), a circuit breaker assembly is arranged in the handcart room (47), an upper conductive connector (40) on the circuit breaker assembly is connected with an outlet of an upper contact box type current transformer (50) arranged in the feeder room (48), and an inlet of the upper contact box type current transformer (50) is connected with an upper branch bus connector (52) through a grounding switch (51);
the lower conductive connector (41) on the breaker assembly is connected with the outlet of a lower contact box-type current transformer (53) arranged in the bus chamber (49), and the inlet of the lower contact box-type current transformer (53) is connected with a lower branch bus connector (54); the circuit breaker assembly comprises a frame (31), a vacuum arc-extinguishing chamber (32), an operating mechanism (33), a connecting insulation pull rod (34) and an insulation support rod (35), wherein an upper layer insulator (37) and a lower layer insulator (37) are fixedly arranged on a vertical frame (36) of the frame (31), the upper end of the vacuum arc-extinguishing chamber (32) is connected with the insulator (37) positioned on the upper layer through an upper wire outlet seat (38), the lower end of the vacuum arc-extinguishing chamber (32) is connected with the insulator (37) positioned on the lower layer through a lower wire outlet seat (39), the operating mechanism (33) is arranged in the vertical frame (36) of the frame (31), and the operating mechanism (33) is in transmission connection with a movable conductive rod of the vacuum arc-extinguishing chamber (32) through the connecting insulation pull rod (34); the upper wire outlet seat (38) and the lower wire outlet seat (39) are fixedly connected through an insulating stay bar (35);
the connecting insulation pull rod (34) comprises a connecting insulation pull rod body (1), a first connecting joint (2) and a second connecting joint (3), wherein the first connecting joint (2) is in threaded connection with one end of the connecting insulation pull rod body (1), the other end of the connecting insulation pull rod body (1) is provided with a sleeve joint (4), a threaded joint (5) is arranged at the bottom end of the sleeve joint (4), and an adjusting umbrella skirt sleeve (6) is arranged outside the sleeve joint (4); the second connector (3) comprises an inner end connector (7) and an outer end connector (8), one end of the inner end connector (7) is provided with a threaded adjusting connector (9) which is mutually matched and connected with the threaded connector (5), and the other end of the inner end connector (7) is elastically connected with the outer end connector (8) in a telescopic manner;
a movable adjusting disc (17) is sleeved at the outer end part of the outer end connector (8), a plurality of movable adjusting rods (18) are circumferentially arranged on the movable adjusting disc (17), adjusting holes (19) are correspondingly formed in sleeve connectors (4) corresponding to the adjustable umbrella skirt sleeves (6) and correspond to the movable adjusting rods (18), the movable adjusting rods (18) penetrate through the adjusting holes (19), three-angle support rod frame devices (20) are symmetrically arranged at the outer ends of the movable adjusting rods (18), and port sealing caps (21) are arranged at ports of the sleeve connectors (4);
wherein, the upper wire outlet seat (38) is connected with an upper conductive joint (40), and the lower wire outlet seat (39) is connected with a lower conductive joint (41); an insulating cover (44) is arranged on each of the upper wire outlet seat (38) and the lower wire outlet seat (39);
the insulation stay bar (35) comprises an insulation stay bar body (42), and the upper end and the lower end of the insulation stay bar body (42) are respectively provided with a high staggered umbrella skirt (43);
the second connector (3) at the inner side of the movable adjusting disc (17) is sleeved with a third spring (26), and the second connector (3) at the outer side of the movable adjusting disc (17) is sleeved with a fourth spring (27).
2. A 40.5kV switchgear system according to claim 1, characterized by: the inner connector (7) other end is equipped with connecting sleeve (10), and bottom in connecting sleeve (10) is equipped with spline sleeve section (11), outer end connector (8) are the shaft-like structure, and outer end connector (8) one end is equipped with spline sleeve section (11) matched with spline shaft section (12), outer end connector (8) other end is equipped with linkage joint (13), and outer end connector (8) are inserted through spline shaft section (12) and are established in spline sleeve section (11), install first spring (14) between spline shaft section (12) inboard and connecting sleeve (10) bottom, and the cover is equipped with second spring (15) on outer end connector (8) in spline shaft section (12) outside, installs screw cap (16) through connecting sleeve (10) port and encapsulates second spring (15) in connecting sleeve (10).
3. A 40.5kV switchgear system according to claim 1, characterized by: the triangular support device (20) comprises an upper support rod (22), a lower support rod (23) and a sliding connection block (24), wherein the bottom end of the upper support rod (22) is hinged to the sliding connection block (24), the upper end of the lower support rod (23) is hinged to the sliding connection block (24), and the sliding connection block (24) is connected to the outer end part of the movable adjusting rod (18) in a sliding manner; the upper end of the upper stay bar (22) is provided with an arc-shaped stay block (25).
4. A 40.5kV switchgear system according to claim 1, characterized by: the port sealing cap (21) is provided with a square rod section (28) on the corresponding outer end connector (8), the port sealing cap (21) is matched with the square rod section (28) to form a square hole, and the outer ring surface of the port sealing cap (21) is connected to the port surface of the sleeve connector (4) through a bolt (29).
5. A 40.5kV switchgear system according to claim 1, characterized by: the lower end of the movable adjusting rod (18) is movably arranged on the movable adjusting disc (17); the ring surface of the connecting insulating pull rod body (1) is provided with a plurality of umbrella skirts (30).
6. A 40.5kV switchgear system according to claim 1, characterized by: a dehumidifying device (55) is arranged in the bus chamber (49).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810842867.XA CN108767726B (en) | 2018-07-27 | 2018-07-27 | 40.5kV switchgear system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810842867.XA CN108767726B (en) | 2018-07-27 | 2018-07-27 | 40.5kV switchgear system |
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| CN108767726A CN108767726A (en) | 2018-11-06 |
| CN108767726B true CN108767726B (en) | 2023-05-23 |
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| CN201810842867.XA Active CN108767726B (en) | 2018-07-27 | 2018-07-27 | 40.5kV switchgear system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111863515B (en) * | 2020-06-19 | 2022-07-22 | 晨诺电气科技集团有限公司 | Vacuum contactor's explosion chamber contact piece emergency treatment device |
| CN112701605A (en) * | 2020-12-24 | 2021-04-23 | 四川电器集团中低压智能配电有限公司 | Intelligent switchgear |
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| US8729416B2 (en) * | 2012-01-23 | 2014-05-20 | Electro-Mechanical Corporation | Circuit breaker remote tripping |
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| CN108767726A (en) | 2018-11-06 |
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