CN113593947A - Circuit breaker and switch cabinet - Google Patents
Circuit breaker and switch cabinet Download PDFInfo
- Publication number
- CN113593947A CN113593947A CN202110778381.6A CN202110778381A CN113593947A CN 113593947 A CN113593947 A CN 113593947A CN 202110778381 A CN202110778381 A CN 202110778381A CN 113593947 A CN113593947 A CN 113593947A
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- Prior art keywords
- contact
- moving contact
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- moving
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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
- H01H73/04—Contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
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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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
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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
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a circuit breaker and a switch cabinet, wherein the circuit breaker comprises: explosion chamber and isolation structure, the explosion chamber has the outer link, isolation structure includes the seat of being qualified for the next round of competitions with external terminal conductive connection, along the moving contact of linear direction removal assembly on the seat of being qualified for the next round of competitions and be used for the stationary contact who switches on with the moving contact, the moving contact has the switch-on station with the stationary contact switch-on and the isolation station with the stationary contact disconnection in the straight line reciprocating motion stroke, the stationary contact has the passageway of inserting that supplies the moving contact male, be equipped with the vent with external intercommunication on inserting the passageway, there is the moving contact heat dissipation channel that link up in the moving contact, when the moving contact is in the switch-on station, moving contact heat dissipation channel communicates with inserting the passageway each other, make the air current pass in and out through inserting passageway and moving contact heat dissipation channel, in order to realize the heat dissipation to moving contact and stationary contact. The invention aims to provide a circuit breaker, which is used for solving the problem that the temperature rise of the existing circuit breaker is high under the condition of natural air cooling.
Description
Technical Field
The invention relates to a circuit breaker and a switch cabinet.
Background
With the continuous progress of science and technology, people have higher and higher requirements on power distribution products, and under the background, the switch cabinet is gradually applied as an electrical device. The circuit breaker is mostly arranged in a switch cabinet for controlling and protecting high-voltage electrical equipment due to the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinction.
The invention patent with the publication number of CN103681098B discloses a circuit breaker with an isolation station and a switch cabinet using the circuit breaker, the switch cabinet comprises a cabinet body, a circuit breaker chamber, a bus chamber and a cable chamber are arranged in the cabinet body, the bus chamber and the cable chamber are respectively arranged above and below the circuit breaker, the circuit breaker with the isolation station is movably assembled on a track at the bottom of the circuit breaker chamber, the circuit breaker with the isolation station comprises an arc extinguish chamber which is vertically arranged, the arc extinguish chamber is provided with an upper electrode and a lower electrode, an upper wire outlet seat which is communicated with the upper electrode is fixed at the top of the arc extinguish chamber, a lower wire outlet seat which is communicated with the lower electrode is fixed at the bottom of the arc extinguish chamber, the circuit breaker with the isolation station also comprises an upper isolation moving contact which is movably assembled in the upper wire outlet seat in an up-and up-down guiding way and is in conductive contact with the upper wire outlet seat, and a lower isolation moving contact which is assembled in the lower wire outlet seat in an up-down guiding way and is in conductive contact with the lower wire outlet seat, the upper isolation moving contact and the lower isolation moving contact are respectively separated from the corresponding upper isolation static contact and the corresponding lower isolation static contact when the upper isolation moving contact and the lower isolation moving contact are positioned at the isolation stations, so that an isolation port is formed, and the circuit breaker is positioned in an isolation state at the moment. The upper isolation static contact is an upper isolation static contact seat, the lower isolation static contact is a lower isolation static contact seat, the upper end of the arc extinguish chamber is a static end, the lower end of the arc extinguish chamber is a movable end, the upper electrode and the lower electrode respectively form a static outer connecting end and a movable outer connecting end of the arc extinguish chamber, the lower isolation moving contact, the lower isolation static contact seat and the lower wire outlet seat form a movable end isolation structure, and the upper isolation moving contact, the upper isolation static contact seat and the upper wire outlet seat form a static end isolation structure.
However, under the action of large current, the temperature rise of the circuit breaker is often out of standard during natural air cooling, and therefore, in order to reduce the temperature rise, a fan is mostly adopted for forced cooling. But the fan is adopted for cooling, so that the daily maintenance workload of the switch cabinet is increased, and the reliability of the switch cabinet in the use process is reduced.
Disclosure of Invention
The invention aims to provide a circuit breaker, which is used for solving the problem that the temperature rise of the existing circuit breaker is high under the condition of natural air cooling. The invention also provides a switch cabinet, which is used for solving the problem of lower reliability of the existing switch cabinet under the natural air cooling condition.
The technical scheme of the circuit breaker is as follows:
the circuit breaker includes:
an arc extinguishing chamber having an outer terminal;
the isolation structure is in conductive connection with the external end of the arc extinguish chamber and comprises a wire outlet seat in conductive connection with the external end, a moving contact assembled on the wire outlet seat in a guiding and moving mode along the linear direction and a static contact seat used for being communicated with the moving contact;
the moving contact is provided with a switch-on station connected with the static contact seat and an isolation station disconnected with the static contact seat in a linear reciprocating movement stroke;
the static contact seat is provided with an insertion channel for inserting the moving contact, one end of the insertion channel is provided with a moving contact insertion hole for inserting the moving contact, and the other end of the insertion channel is provided with a ventilation opening communicated with the outside;
a through moving contact heat dissipation channel is arranged in the moving contact;
when the moving contact is positioned at a switch-on station, the moving contact heat dissipation channel is communicated with the insertion channel, so that air flow can enter and exit through the insertion channel and the moving contact heat dissipation channel, and heat dissipation of the moving contact and the static contact base is realized.
Has the advantages that: the moving contact heat dissipation channel is communicated with the air vent, and when the moving contact is positioned at a switching-on station, the moving contact heat dissipation channel, the insertion channel and the air vent are communicated with each other.
Furthermore, two external ends of the arc extinguish chamber are arranged up and down, and the moving contact is assembled on the wire outlet seat in a vertically guiding and moving mode.
Has the advantages that: the chimney effect is utilized in the vertical arrangement mode, when the circuit breaker is switched on, the convection effect between the moving contact heat dissipation channel and the external inserting channel is enhanced, and heat generated at the moving contact and the static contact seat can be discharged through the moving contact heat dissipation channel and the inserting channel more quickly.
Furthermore, the number of the isolation structures is two, the two isolation structures are respectively in conductive connection with two external connection ends of the arc extinguish chamber, the two external connection ends of the arc extinguish chamber are respectively a movable external connection end and a static external connection end, the isolation structure in conductive connection with the movable external connection end is a movable end isolation structure, the isolation structure in conductive connection with the static external connection end is a static end isolation structure, and in the movable end isolation structure, the static contact base is positioned at the lower side of the movable contact; in the static end isolation structure, a static contact seat is positioned at the upper side of a moving contact; the central axis of the arc extinguish chamber is positioned on the plane where the central axes of the moving contacts of the two isolation structures are positioned.
Has the advantages that: the setting of two isolation structures makes the security that has further improved the circuit breaker when using, and in addition, the central axis of the moving contact of two isolation structures and the central axis coplane setting of explosion chamber have reduced the shared space of circuit breaker and then have reduced the volume of cubical switchboard.
Furthermore, the two isolation structures are respectively in conductive connection with the two external connection ends of the arc extinguish chamber, the two external connection ends of the arc extinguish chamber are respectively a movable external connection end and a static external connection end, the isolation structure electrically connected with the dynamic external connection end is a dynamic end isolation structure, the isolation structure electrically connected with the static external connection end is a static end isolation structure, the exterior of the arc extinguish chamber is provided with an insulating shell, a dynamic end moving cavity for the dynamic external connection end to move is arranged in the insulating shell, the outlet seat of the movable end isolation structure comprises a connecting arm and a seat body, the seat body is provided with a movable contact through hole which is conductive with the movable contact of the movable end isolation structure and through which the movable contact of the movable end isolation structure passes, the connecting arm is provided with an outlet seat heat dissipation channel, the outlet seat heat dissipation channel is communicated with the movable contact through hole and the movable end cavity, and heat of the movable end cavity can be dissipated through the outlet seat heat dissipation channel.
Has the advantages that: the arrangement of the wire outlet seat enables the heat of the movable cavity at the movable end to be dissipated along the heat dissipation channel of the wire outlet seat, the heat dissipation efficiency of the movable cavity at the movable end is effectively improved, and the temperature rise at the movable external end of the arc extinguish chamber under the natural air cooling condition is further reduced.
Furthermore, the base body is provided with a radiating hole for communicating the moving contact through hole with the outside.
Has the advantages that: the heat dissipation holes are convenient for heat to be dissipated outwards, heat accumulation in the through holes of the moving contact is avoided, and temperature rise is effectively reduced.
Furthermore, a ventilation groove is formed in the inner wall of the moving contact through hole, and an opening at one end of the wire outlet seat heat dissipation channel is located at the bottom of the ventilation groove.
Has the advantages that: the arrangement enables the interval between the opening at one end of the heat dissipation channel and the movable contact to be larger, and heat can be conveniently dissipated from the opening of the heat dissipation channel.
Further, the stationary contact seat comprises a stationary contact tubular column which is conductive with the moving contact and a wiring terminal which is connected with a bus, the wiring terminal is connected to one end of the stationary contact tubular column, the insertion channel is arranged in the stationary contact tubular column, and the wiring terminal is arranged at a vent of the stationary contact tubular column.
Has the advantages that: the static contact seat has a simple structure.
Furthermore, the outlet seat is provided with a moving contact through hole which is conductive with the moving contact and through which the moving contact passes, and the hole wall of the moving contact through hole is provided with a heat dissipation hole which is communicated with the outside and the moving contact through hole.
Has the advantages that: the arrangement of the radiating holes and the moving contact through holes enables heat generated between the moving contact and the wire outlet seat to be discharged through the radiating holes, so that heat accumulation in the moving contact through holes is avoided, and temperature rise is effectively reduced.
Furthermore, the moving contact is a hollow straight pipe.
Has the advantages that: the hollow straight pipe has simple structure and is convenient to process.
The technical scheme of the switch cabinet is as follows:
the switch cabinet comprises a cabinet body and a circuit breaker arranged in the cabinet body;
the circuit breaker includes:
an arc extinguishing chamber having an outer terminal;
the isolation structure is in conductive connection with the external end of the arc extinguish chamber and comprises a wire outlet seat in conductive connection with the external end, a moving contact assembled on the wire outlet seat in a guiding and moving mode along the linear direction and a static contact seat used for being communicated with the moving contact;
the moving contact is provided with a switch-on station connected with the static contact seat and an isolation station disconnected with the static contact seat in a linear reciprocating movement stroke;
the static contact seat is provided with an insertion channel for inserting the moving contact, one end of the insertion channel is provided with a moving contact insertion hole for inserting the moving contact, and the other end of the insertion channel is provided with a ventilation opening communicated with the outside;
a through moving contact heat dissipation channel is arranged in the moving contact;
when the moving contact is positioned at a switch-on station, the moving contact heat dissipation channel is communicated with the insertion channel, so that air flow can enter and exit through the insertion channel and the moving contact heat dissipation channel, and heat dissipation of the moving contact and the static contact base is realized.
Has the advantages that: the moving contact heat dissipation channel is communicated with the air vent, and when the moving contact is positioned at a switching-on station, the moving contact heat dissipation channel, the plug-in channel and the air vent are communicated with each other. Therefore, the switch cabinet reduces the daily maintenance workload of the switch cabinet and improves the use reliability of the switch cabinet under the natural air cooling condition.
Furthermore, two external ends of the arc extinguish chamber are arranged up and down, and the moving contact is assembled on the wire outlet seat in a vertically guiding and moving mode.
Has the advantages that: the chimney effect is utilized in the vertical arrangement mode, when the circuit breaker is switched on, the convection effect between the moving contact heat dissipation channel and the external inserting channel is enhanced, and heat generated at the moving contact and the static contact seat can be discharged through the moving contact heat dissipation channel and the inserting channel more quickly.
Furthermore, the number of the isolation structures is two, the two isolation structures are respectively in conductive connection with two external connection ends of the arc extinguish chamber, the two external connection ends of the arc extinguish chamber are respectively a movable external connection end and a static external connection end, the isolation structure in conductive connection with the movable external connection end is a movable end isolation structure, the isolation structure in conductive connection with the static external connection end is a static end isolation structure, and in the movable end isolation structure, the static contact base is positioned at the lower side of the movable contact; in the static end isolation structure, a static contact seat is positioned at the upper side of a moving contact; the central axis of the arc extinguish chamber is positioned on the plane where the central axes of the moving contacts of the two isolation structures are positioned.
Has the advantages that: the setting of two isolation structures makes the security that has further improved the circuit breaker when using, and in addition, the central axis of the moving contact of two isolation structures and the central axis coplane setting of explosion chamber have reduced the shared space of circuit breaker and then have reduced the volume of cubical switchboard.
Furthermore, the two isolation structures are respectively in conductive connection with the two external connection ends of the arc extinguish chamber, the two external connection ends of the arc extinguish chamber are respectively a movable external connection end and a static external connection end, the isolation structure electrically connected with the dynamic external connection end is a dynamic end isolation structure, the isolation structure electrically connected with the static external connection end is a static end isolation structure, the exterior of the arc extinguish chamber is provided with an insulating shell, a dynamic end moving cavity for the dynamic external connection end to move is arranged in the insulating shell, the outlet seat of the movable end isolation structure comprises a connecting arm and a seat body, the seat body is provided with a movable contact through hole which is conductive with the movable contact of the movable end isolation structure and through which the movable contact of the movable end isolation structure passes, the connecting arm is provided with an outlet seat heat dissipation channel, the outlet seat heat dissipation channel is communicated with the movable contact through hole and the movable end cavity, and heat of the movable end cavity can be dissipated through the outlet seat heat dissipation channel.
Has the advantages that: the arrangement of the wire outlet seat enables the heat of the movable cavity at the movable end to be dissipated along the heat dissipation channel of the wire outlet seat, the heat dissipation efficiency of the movable cavity at the movable end is effectively improved, and the temperature rise at the movable external end of the arc extinguish chamber under the natural air cooling condition is further reduced.
Furthermore, the base body is provided with a radiating hole for communicating the moving contact through hole with the outside.
Has the advantages that: the heat dissipation holes are convenient for heat to be dissipated outwards, heat accumulation in the through holes of the moving contact is avoided, and temperature rise is effectively reduced.
Furthermore, a ventilation groove is formed in the inner wall of the moving contact through hole, and an opening at one end of the wire outlet seat heat dissipation channel is located at the bottom of the ventilation groove.
Has the advantages that: the arrangement enables the interval between the opening at one end of the heat dissipation channel and the movable contact to be larger, and heat can be conveniently dissipated from the opening of the heat dissipation channel.
Further, the stationary contact seat comprises a stationary contact tubular column which is conductive with the moving contact and a wiring terminal which is connected with a bus, the wiring terminal is connected to one end of the stationary contact tubular column, the insertion channel is arranged in the stationary contact tubular column, and the wiring terminal is arranged at a vent of the stationary contact tubular column.
Has the advantages that: the static contact seat has a simple structure.
Furthermore, the outlet seat is provided with a moving contact through hole which is conductive with the moving contact and through which the moving contact passes, and the hole wall of the moving contact through hole is provided with a heat dissipation hole which is communicated with the outside and the moving contact through hole.
Has the advantages that: the arrangement of the radiating holes and the moving contact through holes enables heat generated between the moving contact and the wire outlet seat to be discharged through the radiating holes, so that heat accumulation in the moving contact through holes is avoided, and temperature rise is effectively reduced.
Furthermore, the moving contact is a hollow straight pipe.
Has the advantages that: the hollow straight pipe has simple structure and is convenient to process.
Drawings
Fig. 1 is a partial structural schematic view of a switch cabinet embodiment 1 of the invention;
FIG. 2 is a schematic view of the connection between the embedded pole and the outlet seat and the moving contact;
fig. 3 is a schematic diagram of the circuit breaker in an isolation station;
fig. 4 is a schematic diagram of the circuit breaker in the on position;
FIG. 5 is a cross-sectional view of a stationary contact;
FIG. 6 is a schematic structural diagram of a stationary contact of the stationary end;
FIG. 7 is a top view of FIG. 6;
FIG. 8 is a schematic structural view of a movable end stationary contact;
FIG. 9 is a bottom view of FIG. 8;
FIG. 10 is a schematic structural view of the movable terminal wire outlet base;
fig. 11 is a schematic connection diagram of the moving-end isolation structure and the fixed-sealed pole column.
In the figure: 1. a carrier; 2. solid-sealing the pole; 201. an insulating housing; 202. an arc extinguishing chamber; 3. a traveling wheel; 4. a stationary end outlet base; 401. a stationary end connecting arm; 402. a stationary end seat body; 5. a static end moving contact; 501. a stationary end heat dissipation channel; 502. a stationary end rack; 6. a stationary end stationary contact base; 601. a static terminal wiring terminal; 602. the static end statically contacts the pipe column; 603. a stationary end insulator; 7. a movable end heat dissipation hole; 8. a stationary end vent; 9. a static end heat dissipation hole; 10. a movable end wire outlet seat; 101. a movable end seat body; 102. an arm body; 103. a conductive connecting seat; 11. a moving end moving contact; 111. a moving end heat dissipation channel; 112. a moving end rack; 12. a movable end stationary contact seat; 121. a moving end wiring terminal; 122. the movable end statically contacts the pipe column; 123. a moving end insulator; 13. the movable end is inserted into the channel; 14. a movable end ventilation opening; 15. a movable external connection end connecting hole; 16. a movable end cavity; 17. an insulating pull rod; 18. a movable conductive rod; 19. a conductive block; 20. soft connection; 21. heat dissipation holes of the connecting seat; 22. the pole column is provided with heat dissipation holes; 23. a moving contact at a moving end is perforated; 24. a finger touch groove; 25. a ventilation slot; 26. a heat dissipation channel of the outlet base; 27. a moving end gear; 28. a mechanism box; 29. a stationary end drive link; 30. a movable end transmission rod; 31. a circuit breaker chamber; 32. a bus chamber; 33. a cable chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
as shown in fig. 1 to 5, the switch cabinet includes a cabinet body and a circuit breaker disposed in the cabinet body, and in this embodiment, the circuit breaker is a vacuum circuit breaker. The cabinet is provided therein with a breaker chamber 31 and a bus chamber 32 above the breaker chamber 31 and a cable chamber 33 below the breaker chamber 31, respectively, with the breaker being located in the breaker chamber 31.
The circuit breaker includes that bear frame 1 and setting firmly seals utmost point post 2 on bearing frame 1, and the three utmost point post 2 that seals of erectting is parallel the interval setting on the length direction that bears frame 1 side by side, and the utmost point post 2 that seals admittedly includes insulating housing 201, and insulating housing 201 is inside to be equipped with explosion chamber 202, and in this embodiment, explosion chamber 202 is vacuum interrupter. The arc extinguish chamber 202 has two outer connecting ends, which are respectively a static outer connecting end at the upper part of the arc extinguish chamber 202 and a dynamic outer connecting end at the lower part of the arc extinguish chamber 202. The circuit breaker further includes an isolation structure electrically connected to the external terminal of the arc extinguish chamber 202, and in this embodiment, there are two isolation structures, i.e., a static terminal isolation structure electrically connected to the static external terminal and a dynamic terminal isolation structure electrically connected to the dynamic external terminal.
The static end isolation structure comprises a static end wire outlet seat 4 which is fixed on the upper part of the arc extinguish chamber 202 and is in conductive connection with a static external end, a static end moving contact 5 which is vertically guided to move and assembled on the static end wire outlet seat 4 and a static end static contact seat 6 which is used for being communicated with the static end moving contact 5, wherein the static end static contact seat 6 is fixed on the top of the breaker chamber 31 and is connected with a bus in the bus chamber 32. The static end moving contact 5 is provided with a switch-on station connected with the static end static contact seat 6 and an isolation station disconnected with the static end static contact seat 6 in the up-down linear reciprocating movement stroke.
As shown in fig. 4 to 7, in order to facilitate the better connection between the stationary-end moving contact 5 and the stationary-end stationary contact 6, a stationary-end insertion channel is provided on the stationary-end stationary contact 6, specifically, the stationary-end stationary contact 6 includes a stationary-end stationary contact column 602 and a stationary-end connection terminal 601, the stationary-end stationary contact column 602 has a stationary-end insertion channel for the stationary-end moving contact 5 to be inserted into, one end of the stationary-end insertion channel is a stationary-end moving contact insertion hole, the other end of the stationary-end insertion channel has a stationary-end ventilation opening 8 communicating with the outside, the stationary-end connection terminal 601 is used for being connected to a bus in the bus chamber 32, the stationary-end connection terminal 601 is connected to one end of the stationary-end stationary contact column 602, and is disposed at the stationary-end ventilation opening 8 of the stationary-end stationary contact column 602. In addition, in order to prevent the static end static contact seat 6 from being electrified when being switched on, the static end static contact seat 6 further comprises a static end insulator 603 arranged on the outer peripheral surface of the static end static contact pipe column 602, and the static end static contact pipe column 602 and the static end wiring terminal 601 are fixed on the top of the breaker chamber 31 through the static end insulator 603.
The structure of quiet end moving contact 5 is as shown in fig. 5, quiet end moving contact 5 is whole to be hollow straight tube, the inside passage of hollow straight tube is quiet end heat dissipation channel 501, when quiet end moving contact 5 is in the switch-on station, quiet end heat dissipation channel 501, quiet end insert channel 7 and quiet end vent 8 intercommunication each other, the air current can be through quiet end vent 8 business turn over quiet end insert channel and quiet end heat dissipation channel 501, quiet end moving contact 5 and quiet end stationary contact seat 6 department make the heat of production can be along with the air current discharge. In addition, the chimney effect has been utilized in the vertical arranging of quiet end isolation structure, has strengthened quiet end heat dissipation channel 501 and quiet end and has inserted the convection current effect of passageway and external world, and the heat that quiet end moving contact 5 and quiet end stationary contact 6 department produced can be faster through quiet end heat dissipation channel 501 and quiet end insert the 7 discharges of passageway.
The movable end isolation structure comprises a movable end outgoing line seat 10 which is fixed on the lower portion of the arc extinguish chamber 202 and is in conductive connection with the movable external connection end, a movable end moving contact 11 which is vertically guided to move and assembled on the movable end outgoing line seat 10, and a movable end static contact seat 12 which is used for being communicated with the movable end moving contact 11, wherein the movable end static contact seat 12 is fixed on the bottom of the circuit breaker chamber 31 and is connected with a cable in the cable chamber 33. The moving end moving contact 11 has a connection station connected with the moving end static contact seat 12 and an isolation station disconnected with the moving end static contact seat 12 in the up-down linear reciprocating movement stroke.
As shown in fig. 8 to 11, in order to facilitate the better connection between the moving-end moving contact 11 and the moving-end stationary contact 12, a moving-end insertion channel 13 is disposed on the moving-end stationary contact 12, specifically, the moving-end stationary contact 12 includes a moving-end stationary contact column 122 and a moving-end connection terminal 121, the moving-end stationary contact column 122 has a moving-end insertion channel 13 for the moving-end moving contact 11 to be inserted into, one end of the moving-end insertion channel 13 is a moving-end moving contact insertion opening, the other end of the moving-end stationary contact column has a moving-end ventilation opening 14 communicated with the outside, the moving-end connection terminal 121 is used for cable connection in the cable chamber 33, the moving-end connection terminal 121 is connected with one end of the moving-end stationary contact column 122, and is disposed at the moving-end ventilation opening 14 of the moving-end stationary contact column 122. In addition, in order to prevent the cabinet body of the switch cabinet from being electrified when the moving-end stationary contact 12 is switched on, the moving-end stationary contact 12 further includes a moving-end insulator 123 disposed on the outer peripheral surface of the moving-end stationary contact column 122, and the moving-end stationary contact column 122 and the moving-end wiring terminal 121 are fixed at the bottom of the breaker chamber 31 through the moving-end insulator 123.
The structure of the moving end moving contact 11 is shown in fig. 11, the moving end moving contact 11 is integrally a hollow straight pipe, the internal channel of the hollow straight pipe is a moving end heat dissipation channel 111, when the moving end moving contact 11 is at a switch-on station, the moving end heat dissipation channel 111, the moving end insertion channel 13 and the moving end ventilation opening 14 are communicated with each other, the airflow can enter and exit the moving end insertion channel 13 and the moving end heat dissipation channel 111 through the moving end ventilation opening 14, and the moving end moving contact 11 and the moving end stationary contact 12 enable the generated heat to be discharged along with the airflow. In addition, the chimney effect has been utilized in the vertical arrangement of moving end isolation structure, has strengthened moving end heat dissipation channel 111 and the convection effect of moving end insert passageway 13 and external world, and the heat that moves end moving contact 11 and moving end stationary contact 12 department and produce can be faster through moving end heat dissipation channel 111 and the discharge of moving end insert passageway 13.
As shown in fig. 10 and 11, the movable end wire outlet base 10 includes a movable end base body 101 and a movable end connecting arm, and the movable end connecting arm includes an arm body 102 and a conductive connecting base 103. The movable terminal outlet base 10 is integrally formed, and the integrally formed movable terminal outlet base 10 has small heat emission in a through-flow state.
The conductive connecting seat 103 is a cylindrical shell, a movable external connecting end connecting hole 15 is arranged on the cylindrical shell, a movable external connecting end of the arc extinguish chamber 202 is positioned in a movable end moving cavity 16 which is arranged in the insulating shell 201 and used for enabling the movable external connecting end to move up and down, the movable external connecting end comprises a movable conductive rod 18, the movable conductive rod 18 is tightly assembled with an insulating pull rod 17 in a threaded connection mode, the insulating pull rod 17 is driven by a driving mechanism of the circuit breaker, the insulating pull rod 17 drives the movable conductive rod 18 to reciprocate along the up-down direction to realize the connection and disconnection of the movable external connecting end and the static external connecting end, the movable conductive rod 18 is inserted into the conductive connecting seat 103 through the movable external connecting hole 15, a conductive block 19 is conductively connected on the movable conductive rod 18, the conductive block 19 is conductively connected with the hole wall of the movable external connecting hole 15 through a flexible connection 20, specifically, the flexible connection 20 comprises a plurality of copper woven belts, the copper woven belts are arranged around the conductive block 19, one end of the copper woven belt is connected with the conductive block 19, and the other end of the copper woven belt is connected with the hole wall of the movable external connection end connecting hole 15. In addition, the hole wall of the external connection terminal connection hole 15 is provided with a connection seat heat dissipation hole 21, correspondingly, the insulation casing 201 is provided with a pole heat dissipation hole 22, the hole opening of the connection seat heat dissipation hole 21 is over against the hole opening of the pole heat dissipation hole 22, and the arrangement is convenient for discharging heat inside the insulation casing 201. The flexible connection 20 is a flexible conductor commonly used in the field, and can realize conductive connection between two conductors moving relatively, and the commonly used flexible connection 20 has the forms of copper foil, copper stranded wire, steel belt and the like besides the copper braided belt.
The moving end base body 101 is a cylindrical shell, a moving end moving contact through hole 23 is formed in the cylindrical shell, a moving end moving contact through hole 23 which is conductive to the moving end moving contact 11 and through which the moving end moving contact 11 passes is formed in the moving end base body 101, annular contact finger grooves 24 which are vertically and symmetrically arranged are formed in the inner wall of the moving end moving contact through hole 23, contact fingers are installed in the contact finger grooves 24, and the moving end base body 101 is in conductive connection with the moving end moving contact 11 through the contact fingers. In addition, be equipped with ventilation groove 25 on the moving end moving contact perforation 23 inner wall, ventilation groove 25 is located between two touch finger grooves 24, and is provided with a plurality of moving end louvres 7 on the tank bottom of ventilation groove 25, and the setting of moving end louvre 7 is convenient for the heat and outwards gives out, avoids moving the heat gathering in the moving end moving contact perforation 23, effectively reduces the temperature rise.
One end of the arm 102 is connected to the moving terminal body 101, and the other end is connected to the conductive connection seat 103, and the arm 102 is used for electrically connecting the conductive connection seat 103 and the moving terminal body 101. Be equipped with the seat heat dissipation channel 26 of being qualified for the next round of competitions in the arm body 102, seat heat dissipation channel 26 of being qualified for the next round of competitions one end opening and the inside intercommunication of electrically conductive connecting seat 103, one end opening and the movable end moving contact perforation 23 intercommunication of movable end pedestal body 101 and this opening locate on the tank bottom of ventilation groove 25, the heat of movable end activity chamber 16 department can flow into in the ventilation groove 25 and discharge through movable end louvre 7 through seat heat dissipation channel 26 of being qualified for the next round of competitions, the heat that produces in the movable end moving contact perforation 23 also can flow into in insulating housing 201 and discharge through utmost point post louvre 22 through seat heat dissipation channel 26 of being qualified for the next round of competitions.
As shown in fig. 11, in order to facilitate the moving-end moving contact 11 to slide in the moving-end moving contact through hole 23, a moving-end gear 27 is installed at an opening of the wire seat heat dissipation channel 26 on the ventilation slot 25, and the moving-end gear 27 is engaged with a moving-end rack 112 disposed along the extending direction of the moving-end moving contact 11, so as to implement the up-and-down movement of the moving-end moving contact 11.
In order to facilitate the control and adjustment of the connection station and the isolation station of the static end isolation structure and the moving end isolation structure, the circuit breaker comprises a mechanism box 28, and the mechanism box 28 drives the static end rack 502 and the moving end rack 112 to move up and down by controlling the rotation of the static end transmission rod 29 and the moving end transmission rod 30, so as to realize the up and down movement of the static end moving contact 5 and the moving end moving contact 11.
More specifically, the circuit breaker bear frame 1 through bear 3 direction of walking wheel that 1 bottom set up install on the guide rail of circuit breaker room 31 bottom, when the circuit breaker broke down, be convenient for shift out the circuit breaker and overhaul it. In addition, in the embodiment, the central axis of the arc extinguish chamber (202) is positioned on the plane where the central axes of the movable contacts of the two isolation structures are positioned, so that the space occupied by the circuit breaker is reduced, and the volume of the switch cabinet is further reduced.
The moving contact radiating channels which are communicated are arranged in the moving contacts of the two isolation structures of the breaker of the switch cabinet, the static contact seat is provided with an inserting channel for the moving contact to insert, one end of the insertion channel is provided with a moving contact insertion opening for inserting the moving contact, the other end is provided with a ventilation opening communicated with the outside, when the moving contact is positioned at a switch-on station, the moving contact heat dissipation channel, the plug-in channel and the ventilation opening are communicated with each other, airflow can pass through the ventilation opening to enter and exit the plug-in channel and the moving contact heat dissipation channel, and heat generated at the moving contact and the static contact seat can be discharged along with the airflow, in addition, the vertical arrangement mode of the isolation structure utilizes the chimney effect, the through-flow effect is enhanced, the heat dissipation efficiency of the circuit breaker under the natural air cooling condition is improved, therefore, the switch cabinet reduces the daily maintenance workload of the switch cabinet and improves the use reliability of the switch cabinet under the natural air cooling condition.
The switch cabinet of embodiment 2 of the present invention is different from the above-described embodiment 1 in that the movable contact is installed on the outlet base in a horizontally guiding manner, and in other embodiments, the movable contact may be installed on the outlet base in an obliquely guiding manner.
The specific embodiment 3 of the switch cabinet of the present invention is different from the embodiment 1 described above in that one isolation structure is provided, the provided isolation structure is a static end isolation structure, in other embodiments, one isolation structure may be provided, and the provided isolation structure may be a dynamic end isolation structure or a static end isolation structure.
The switch cabinet of embodiment 4 of the present invention is different from the above-described embodiment 1 in that no ventilation slot is provided in the moving contact through hole at the moving end, and an opening at one end of the wire outlet seat heat dissipation channel is directly provided on the hole wall of the moving contact through hole at the moving end.
The specific embodiment 5 of the switch cabinet of the present invention is different from the above-described embodiment 1 in that the moving contacts of the two isolation structures are both vertically disposed and the axes of the two moving contacts are collinear, and in other embodiments, the two isolation structures may be arranged at 90 degrees in a plan view.
The switch cabinet of embodiment 6 of the present invention is different from the above-described embodiment 1 in that the arm body of the movable terminal outlet base is solid, and no outlet base heat dissipation channel is provided.
The switch cabinet of the embodiment 7 of the present invention is different from the above-described embodiment 1 in that the terminal of the stationary contact is provided on the outer peripheral surface of the stationary contact column.
The switch cabinet of embodiment 8 of the present invention is different from the above-described embodiment 1 in that the heat dissipation channel in the movable contact is spirally arranged, and in other embodiments, the shape of the movable contact may be adjusted as needed, for example, may be L-shaped, T-shaped, and the like.
In the specific embodiment of the circuit breaker of the present invention, the structure of the circuit breaker is the same as the structure of the circuit breaker described above, and details are not repeated here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. A circuit breaker, comprising:
an arc chute (202) having an outer terminal;
the isolation structure is in conductive connection with an external end of the arc extinguish chamber (202), and comprises a wire outlet seat in conductive connection with the external end, a moving contact assembled on the wire outlet seat in a guiding and moving manner along a linear direction, and a static contact seat used for being communicated with the moving contact;
the moving contact is provided with a switch-on station connected with the static contact seat and an isolation station disconnected with the static contact seat in a linear reciprocating movement stroke;
the device is characterized in that the static contact seat is provided with an insertion channel for inserting the moving contact, one end of the insertion channel is provided with a moving contact insertion hole for inserting the moving contact, and the other end of the insertion channel is provided with a ventilation opening communicated with the outside;
a through moving contact heat dissipation channel is arranged in the moving contact;
when the moving contact is positioned at a switch-on station, the moving contact heat dissipation channel is communicated with the insertion channel, so that air flow can enter and exit through the insertion channel and the moving contact heat dissipation channel, and heat dissipation of the moving contact and the static contact base is realized.
2. The circuit breaker according to claim 1, characterized in that the two outer ends of the arc extinguishing chamber (202) are arranged one above the other, and the moving contact is vertically guided up and down and movably mounted on the outlet base.
3. The circuit breaker according to claim 2, wherein there are two isolation structures, the two isolation structures are respectively in conductive connection with two external terminals of the arc extinguish chamber (202), the two external terminals of the arc extinguish chamber (202) are respectively a movable external terminal and a static external terminal, the isolation structure in conductive connection with the movable external terminal is a movable terminal isolation structure, the isolation structure in conductive connection with the static external terminal is a static terminal isolation structure, and in the movable terminal isolation structure, the static contact base is located at the lower side of the movable contact; in the static end isolation structure, a static contact seat is positioned at the upper side of a moving contact;
the central axis of the arc extinguishing chamber (202) is positioned on the plane of the central axes of the movable contacts of the two isolation structures.
4. The circuit breaker according to claim 1, wherein there are two isolation structures, the two isolation structures are respectively electrically connected to two external terminals of the arc extinguish chamber (202), the two external terminals of the arc extinguish chamber (202) are respectively a movable external terminal and a static external terminal, the isolation structure electrically connected to the movable external terminal is a movable terminal isolation structure, the isolation structure electrically connected to the static external terminal is a static terminal isolation structure, the arc extinguish chamber (202) is externally provided with an insulating housing (201), the insulating housing (201) is internally provided with a movable terminal cavity (16) for the movable external terminal to move, the outlet terminal of the movable terminal isolation structure comprises a connecting arm and a base body, the base body is provided with a movable terminal through hole which the movable terminal of the movable terminal isolation structure is electrically connected to the movable terminal of the movable terminal isolation structure and passes through, the connecting arm is provided with an outlet terminal heat dissipation channel (26), the outlet terminal heat dissipation channel (26) communicates the movable terminal through hole and the movable terminal cavity (16), the heat of the movable cavity (16) at the movable end can be dissipated through the wire outlet seat heat dissipation channel (26).
5. The circuit breaker as claimed in claim 4, wherein the base has a heat dissipation hole for communicating the moving contact through hole with the outside.
6. The circuit breaker according to claim 4, wherein the inner wall of the through hole of the movable contact is provided with a ventilation slot (25), and one end of the heat dissipation channel (26) of the outlet is opened at the bottom of the ventilation slot (25).
7. The circuit breaker according to any one of claims 1 to 6, wherein the stationary contact base comprises a stationary contact column electrically conductive with the movable contact and a connection terminal for connection with the bus bar, the connection terminal is connected to one end of the stationary contact column, the insertion passage is provided in the stationary contact column, and the connection terminal is provided at a vent of the stationary contact column.
8. The circuit breaker as claimed in claim 1, 2 or 3, wherein the outlet base is provided with a moving contact through hole which is electrically conductive with the moving contact and through which the moving contact passes, and a heat dissipation hole for communicating the outside with the moving contact through hole is formed in a wall of the moving contact through hole.
9. The circuit breaker according to any of claims 1-6, wherein said movable contact is a hollow straight tube.
10. A switchgear comprising a cabinet body and a circuit breaker disposed in the cabinet body, wherein the circuit breaker is as claimed in any one of claims 1 to 9.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021105801203 | 2021-05-26 | ||
| CN202110580120 | 2021-05-26 | ||
| CN2021106934838 | 2021-06-22 | ||
| CN202110693483 | 2021-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113593947A true CN113593947A (en) | 2021-11-02 |
Family
ID=78246656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110778381.6A Pending CN113593947A (en) | 2021-05-26 | 2021-07-09 | Circuit breaker and switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113593947A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113972570A (en) * | 2021-11-15 | 2022-01-25 | 平高集团有限公司 | Switch cabinet |
| CN113991489A (en) * | 2021-11-15 | 2022-01-28 | 平高集团有限公司 | Switch cabinet |
| CN114544408A (en) * | 2022-02-08 | 2022-05-27 | 平高集团有限公司 | Contact wear resistance test fixture |
| CN114758931A (en) * | 2022-04-24 | 2022-07-15 | 北京华盛中能科技有限公司 | Circuit breaker with exhaust cooling system |
-
2021
- 2021-07-09 CN CN202110778381.6A patent/CN113593947A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113972570A (en) * | 2021-11-15 | 2022-01-25 | 平高集团有限公司 | Switch cabinet |
| CN113991489A (en) * | 2021-11-15 | 2022-01-28 | 平高集团有限公司 | Switch cabinet |
| CN114544408A (en) * | 2022-02-08 | 2022-05-27 | 平高集团有限公司 | Contact wear resistance test fixture |
| CN114758931A (en) * | 2022-04-24 | 2022-07-15 | 北京华盛中能科技有限公司 | Circuit breaker with exhaust cooling system |
| CN114758931B (en) * | 2022-04-24 | 2024-02-23 | 北京华盛中能科技有限公司 | Circuit breaker with exhaust cooling system |
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