WO2021104525A1 - 一种断路器及使用该断路器的气体绝缘开关柜 - Google Patents

一种断路器及使用该断路器的气体绝缘开关柜 Download PDF

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Publication number
WO2021104525A1
WO2021104525A1 PCT/CN2020/132892 CN2020132892W WO2021104525A1 WO 2021104525 A1 WO2021104525 A1 WO 2021104525A1 CN 2020132892 W CN2020132892 W CN 2020132892W WO 2021104525 A1 WO2021104525 A1 WO 2021104525A1
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WO
WIPO (PCT)
Prior art keywords
shielding cover
arc extinguishing
main shaft
circuit breaker
extinguishing chamber
Prior art date
Application number
PCT/CN2020/132892
Other languages
English (en)
French (fr)
Inventor
赵辉
王焕
许海超
卓会丹
沈景贵
高正付
张海
张梦柯
王强
刘永豪
高胜豪
侯宾宾
张建民
Original Assignee
河南平高通用电气有限公司
平高集团有限公司
国家电网有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 河南平高通用电气有限公司, 平高集团有限公司, 国家电网有限公司 filed Critical 河南平高通用电气有限公司
Publication of WO2021104525A1 publication Critical patent/WO2021104525A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02Housings; Casings; Bases; Mountings
    • H01H71/0207Mounting or assembling the different parts of the circuit breaker
    • H01H71/0221Majority of parts mounted on central frame or wall

Definitions

  • This application relates to the field of power distribution technology, and in particular to a circuit breaker and a gas insulated switchgear using the circuit breaker.
  • SF6 gas is an excellent electrical gas as well as a greenhouse gas.
  • some countries have begun to levy carbon taxes on the use of SF6.
  • the use of SF6 gas at home and abroad will be subject to more and more restrictions. Therefore, for gas Insulated and fully enclosed ring network cabinet, SF6 removal has important environmental protection significance, and has become the development direction.
  • environmentally friendly gases such as dry air, nitrogen, etc.
  • the environmentally friendly gas insulated ring network cabinets disclosed in the utility model patent with the authorized announcement number CN206135290U are installed in them.
  • Circuit breaker the circuit breaker includes a frame and the main circuit of the circuit breaker switch.
  • the frame includes two circuit breaker fixing plates at the front and rear ends and a circuit breaker clamping plate on the left and right sides.
  • the circuit breaker fixing plate and the circuit breaker clamping plate are fixed and assembled by bolts.
  • the main circuit of the switch includes a soft connection, an arc extinguishing chamber and an isolated upper static contact.
  • the main circuit of the circuit breaker switch is correspondingly arranged with three phases, and the transmission mechanism of the arc extinguishing chamber of each phase is connected to the circuit breaker shaft to be passed by the circuit breaker operating mechanism.
  • the rotating shaft of the circuit breaker drives the moving contact in the arc extinguishing chamber to realize the opening and closing operations of the arc extinguishing chamber.
  • the circuit breaker shaft is supported by the main shaft support frames arranged in the corresponding three-phase arc extinguishing chambers.
  • the main shaft support frame is fixedly installed on the circuit breaker clamp plate.
  • the main shaft support frame is provided with support holes.
  • the circuit breaker shaft passes through the support holes to be supported by the main shaft.
  • the skeleton supports the circuit breaker shaft.
  • the transmission mechanism of each phase of the arc extinguishing chamber is connected with a movable conductive rod.
  • the circuit breaker shaft rotates, the corresponding movable contact is driven by the transmission mechanism and the movable conductive rod to reciprocate.
  • the flexible connection structure is conductively connected, and the flexible connection structure exists as a part of the external lead bar, and the external lead bar is used to pass through the frame of the circuit breaker to be conductive with the corresponding terminal on the ring network cabinet (such as the incoming bushing) Connect to realize external wiring and meet the normal use requirements of the ring network cabinet.
  • the above-mentioned three-phase arc extinguishing chambers are arranged at intervals along the axial direction of the insulating main shaft. Since the movable conductive rods and transmission mechanisms of the arc extinguishing chambers of each phase are exposed outside the arc extinguishing chamber, the spacing of the three-phase arc extinguishing chambers needs to be designed to meet the insulation requirements. However, since the insulation performance of environmentally friendly gas is worse than that of SF6, in order to improve the insulation performance between adjacent arc extinguishing chambers, a climbing umbrella skirt is installed on the rotating shaft of the circuit breaker, and the adjacent arc extinguishing chambers are improved by adding climbing umbrella skirts. Insulation performance between.
  • this method of setting the climbing umbrella skirt on the rotating shaft of the circuit breaker can improve the insulation performance without increasing the distance between adjacent arc extinguishing chambers, or, On the basis of meeting the insulation performance of adjacent arc extinguishing chambers, the distance between adjacent arc extinguishing chambers can be reduced.
  • there are pointed structures in the exposed conductive parts such as the moving conductive rod and the transmission mechanism. These pointed structures tend to form a higher potential, and the higher potential at the tip is used as the potential of the corresponding interrupter.
  • the standard directly determines the distance between adjacent arc extinguishing chambers, and the way of setting the climbing umbrella skirt on the shaft of the circuit breaker has little effect on the higher potential at the tip, and cannot effectively reduce the impact of the higher potential at the tip. Therefore, this The method of setting the climbing umbrella skirt on the rotating shaft of the circuit breaker has little effect on reducing the interval between adjacent arc extinguishing chambers, and cannot effectively shorten the interval between adjacent arc extinguishing chambers, which does not conform to the development direction of circuit breaker miniaturization.
  • this application is to provide a circuit breaker to solve the technical problem that the cold shrinkable insulator provided on the insulation main shaft of the circuit breaker in the prior art cannot reduce the influence of the higher electric potential at the tip of the exposed motor outside the arc extinguishing chamber; at the same time, this application also provides A gas insulated switchgear using a circuit breaker.
  • circuit breaker including:
  • the arc extinguishing chamber is installed in the insulating frame, and the arc extinguishing chamber includes an arc extinguishing chamber housing and a movable conductive rod, and the movable conductive rod is assembled in the arc extinguishing chamber housing to move back and forth in the up and down direction,
  • the movable conductive rod penetrates upwards out of the arc extinguishing chamber housing, and the part of the movable conductive rod passing through the arc extinguishing chamber housing is electrically connected to an external lead bar;
  • a spindle support frame supported and installed on the insulating frame, the spindle support frame having a spindle support hole;
  • An insulated spindle a rotatably supported and assembled in the spindle support hole, the insulated spindle drives the movable conductive rod to reciprocate up and down through a transmission mechanism;
  • the shielding cover is formed by two sub-covers that are butt-assembled together, and the two sub-covers clamp the spindle support frame to fix the shielding cover on the spindle support frame; the shielding cover and
  • the exposed conductive part of the arc extinguishing chamber is conductively connected and is arranged outside the exposed conductive part of the arc extinguishing chamber.
  • the shielding cover has a smooth outer surface for uniform electric field; the shielding cover is insulated from the insulation
  • the frames and the shielding cover and the arc extinguishing chamber shell are arranged at intervals; the shielding cover is provided with a spindle hole for the insulating spindle to pass through; the shielding cover is also provided with a lead wire Row of perforations are provided for passing through the gap of the corresponding external lead row of the arc extinguishing chamber.
  • the shielding cover is set outside the exposed conductive part of the arc extinguishing chamber, and the main shaft perforation, lead row perforation and other structures are used to install the insulated main shaft and external lead row to ensure the destruction.
  • the shielding effect of the shielding cover can effectively eliminate the influence of the higher potential at the tip of the exposed conductive part of the arc extinguishing chamber.
  • the smooth outer peripheral surface of the shielding cover evens the electric field, thereby effectively avoiding the high at the tip of the exposed conductive part. Influence of electric potential, the electric potential on the outer surface of the shielding cover is relatively uniform.
  • the shielding cover is installed by using the two-part cover body to clamp the main shaft support frame.
  • the shielding cover is arranged separately from the insulating frame and the arc extinguishing chamber shell.
  • the shielding cover does not contact the insulating frame and the arc extinguishing chamber shell, effectively avoiding shielding.
  • the problem of electric field distortion generated when the cover is in contact with the insulating frame and the arc extinguishing chamber shell not only avoids affecting the internal electric field of the shielding cover, but also avoids affecting the insulation performance of the insulating frame and the arc extinguishing chamber shell.
  • a plug-in barrel structure is provided on the main shaft support frame, the inner hole of the plug-in barrel structure forms the main shaft support hole, and the two sub-covers are assembled to clamp the main shaft support frame At this time, the corresponding end of the plug-in barrel structure is positioned and inserted in the main shaft hole of the shielding cover.
  • the plug-in barrel structure on the main shaft support frame is equipped with main shaft support holes inside, and the outer part is perforated and assembled with the main shaft, thereby facilitating clearance fit between the insulating main shaft and the main shaft perforation on the shielding cover.
  • the plug-in barrel structure is used to form the main shaft support hole and to position and assemble the shielding cover. Under the simplification of the overall situation, the positioning and assembly of the insulating main shaft, the main shaft support frame and the shielding cover are concentratedly realized.
  • the plug-in barrel structure and the main shaft of the shielding cover are perforated and positioned to form an upper plug-in positioning assembly, and two lower plugs are provided between the main shaft support frame and the shielding cover.
  • the two positions of the lower and the upper are arranged in a zigzag shape, each of which includes a positioning plug part and an adapting plug part.
  • the positioning plug-in portion is arranged on the main shaft support frame, and the adaptable plug-in portion is arranged on the shielding cover.
  • the beneficial effect is that the upper plug-in positioning assembly and the two-side lower plug-in positioning assembly are used to form a distributed positioning, which facilitates the positioning and assembly of the separate cover body and the spindle support frame, and improves the assembly efficiency.
  • the main shaft support frame is provided with a support connection part
  • the insulation frame is provided with a support installation part
  • the shielding cover is provided with a support hole for the support connection part to pass through or supply
  • the support mounting part penetrates through the gap, so that the support connecting part and the support mounting part are fixedly connected, so that the main shaft support frame is supported and mounted on the insulating frame.
  • the beneficial effect is that the supporting perforation on the shielding cover is used for the supporting connection part on the corresponding main shaft support frame to pass through or the supporting installation part on the insulation frame of the circuit breaker to penetrate through the gap, which is convenient for assembly.
  • the main shaft support frame is a conductive element
  • the support connection part is located in the shielding cover
  • the insulating frame includes an insulating side plate, and the insulating side plate protrudes upward toward the side of the shielding cover.
  • An insulating bump is provided, and the insulating bump is inserted into the support perforation as the support mounting portion, and a gap is left with the hole wall of the support perforation.
  • the beneficial effect is that the insulating bumps are used to insert the support through holes to prevent the support connection part from being exposed to affect the electric field distribution.
  • the main shaft support frame is a conductive member
  • the main shaft support frame is a conductive member
  • the main shaft support frame is conductively connected to the shielding cover and the corresponding exposed conductive part of the arc extinguishing chamber, So that the shielding cover is conductively connected to the exposed conductive part of the corresponding arc extinguishing chamber through the main shaft support frame.
  • the beneficial effect is that the main shaft support frame is used to realize the conductive connection between the shielding cover and the exposed conductive part of the arc extinguishing chamber, and the main shaft support frame can realize the conductive connection at the same time when it plays a supporting role, thereby simplifying the internal structure.
  • a conductive slide groove is provided on the spindle support frame, and the conductive slide groove is slidably and electrically matched with the conductive pin provided on the movable conductive rod, so that the spindle support frame and the corresponding shaft The exposed conductive part of the arc extinguishing chamber is slidingly conductively connected.
  • the beneficial effect is that the conductive sliding groove is used to realize the sliding conductive connection between the main shaft support frame and the exposed missile part, and the processing and production are more convenient.
  • the main shaft perforation is located at the upper part of the shielding cover, and the top of the shielding cover is provided with a heat dissipation through hole.
  • the beneficial effect is that the shielding cover is provided with heat dissipation through holes, thereby improving the heat dissipation performance of the entire shielding cover.
  • three of the arc extinguishing chambers are sequentially arranged at intervals along the axial direction of the insulating main shaft, and the top end of each of the arc extinguishing chambers is respectively covered with the shielding cover.
  • the beneficial effect is that three arc extinguishing chambers are arranged in sequence, and shielding covers are respectively covered corresponding to each arc extinguishing chamber, so that the distance between adjacent arc extinguishing chambers can be effectively reduced, and the axial size of the entire circuit breaker can be reduced.
  • gas-insulated switchgear including:
  • Gas box used to seal insulating gas
  • the circuit breaker arranged in the air box adopts the above-mentioned circuit breaker.
  • the shielding cover is arranged outside the exposed conductive part of the arc extinguishing chamber, and the main shaft perforation, lead row perforation and other structures are used to install the insulated main shaft and external lead wires.
  • the shielding effect of the shielding cover can effectively eliminate the influence of the higher potential at the tip of the exposed conductive part of the arc extinguishing chamber.
  • the smooth outer peripheral surface of the shielding cover evens the electric field, thereby effectively avoiding the high at the tip of the exposed conductive part.
  • the electric potential on the outer surface of the shielding cover is relatively uniform. At this time, it will be obviously smaller than the high electric potential at the tip of the exposed conductive part, which can effectively improve the electrical insulation performance around the arc extinguishing chamber and effectively reduce the insulation interval requirements. Reducing the overall size of the circuit breaker conforms to the development trend of miniaturization of the circuit breaker, and is also conducive to the miniaturization design of the switchgear.
  • the shielding cover is installed by using the two-part cover body to clamp the main shaft support frame.
  • the shielding cover is arranged separately from the insulating frame and the arc extinguishing chamber shell.
  • the shielding cover does not contact the insulating frame and the arc extinguishing chamber shell, effectively avoiding shielding.
  • the problem of electric field distortion generated when the cover is in contact with the insulating frame and the arc extinguishing chamber shell not only avoids affecting the internal electric field of the shielding cover, but also avoids affecting the insulation performance of the insulating frame and the arc extinguishing chamber shell.
  • the spindle support frame is provided with a plug-in barrel structure, the inner hole of the plug-in cylinder structure forms the spindle support hole, and when the two-part cover is assembled to clamp the spindle support frame, The corresponding end of the plug-in barrel structure is positioned and inserted in the main shaft hole of the shielding cover.
  • the plug-in barrel structure on the main shaft support frame is equipped with main shaft support holes inside, and the outer part is perforated and assembled with the main shaft, thereby facilitating clearance fit between the insulating main shaft and the main shaft perforation on the shielding cover.
  • the plug-in barrel structure is used to form the main shaft support hole and to position and assemble the shielding cover. Under the simplification of the overall situation, the positioning and assembly of the insulating main shaft, the main shaft support frame and the shielding cover are concentratedly realized.
  • the plug-in barrel structure and the main shaft of the shielding cover are perforated and positioned to form an upper plug-in positioning assembly, and two lower plug-in positions are provided between the main shaft support frame and the shielding cover.
  • the two lower plug positioning assembly and the upper positioning plug assembly are arranged in a zigzag shape, each of the lower plug positioning assembly includes a positioning plug portion and an adapter plug portion, and the positioning plug portion is arranged on the On the main shaft supporting frame, the adapting and inserting part is arranged on the shielding cover.
  • the beneficial effect is that the upper plug-in positioning assembly and the two-side lower plug-in positioning assembly are used to form a distributed positioning, which facilitates the positioning and assembly of the separate cover body and the spindle support frame, and improves the assembly efficiency.
  • the main shaft support frame is provided with a support connection part
  • the insulation frame is provided with a support installation part
  • the shielding cover is provided with a support hole for the support connection part to pass through or supply
  • the support mounting part penetrates through the gap, so that the support connection part and the support mounting part are fixedly connected, and the main shaft support frame is supported and mounted on the insulating frame.
  • the beneficial effect is that the supporting perforation on the shielding cover is used for the supporting connection part on the corresponding main shaft support frame to pass through or the supporting installation part on the insulation frame of the circuit breaker to penetrate through the gap, which is convenient for assembly.
  • the main shaft support frame is a conductive element
  • the support connection part is located in the shielding cover
  • the insulating frame includes an insulating side plate, and the side surface of the insulating side plate facing the shielding cover is convex.
  • An insulating bump is provided, and the insulating bump is inserted into the support perforation as the support installation portion, and a gap is left with the hole wall of the support perforation.
  • the beneficial effect is that the insulating bumps are used to insert the support through holes to prevent the support connection part from being exposed to affect the electric field distribution.
  • the main shaft support frame is a conductive member, and the main shaft support frame is electrically conductively connected to the shielding cover and the exposed conductive parts of the corresponding interrupter, so that the shielding cover is connected to the corresponding The exposed conductive parts of the arc extinguishing chamber are electrically connected.
  • the beneficial effect is that the main shaft support frame is used to realize the conductive connection between the shielding cover and the exposed conductive part of the arc extinguishing chamber, and the main shaft support frame can realize the conductive connection at the same time when it plays a supporting role, thereby simplifying the internal structure.
  • a conductive slide groove is provided on the main shaft support frame, and the conductive slide groove is slidably and electrically matched with the conductive pin provided on the movable conductive rod, so that the main shaft support frame and the corresponding arc extinguishing chamber The exposed conductive part is slidingly conductively connected.
  • the beneficial effect is that the conductive sliding groove is used to realize the sliding conductive connection between the main shaft support frame and the exposed missile part, and the processing and production are more convenient.
  • the main shaft perforation is located at the upper part of the shielding cover, and the top of the shielding cover is provided with a heat dissipation through hole.
  • the beneficial effect is that the shielding cover is provided with heat dissipation through holes, thereby improving the heat dissipation performance of the entire shielding cover.
  • three arc extinguishing chambers are sequentially spaced apart along the axial direction of the insulating main shaft, and the top of each arc extinguishing chamber is respectively covered with the shielding cover.
  • the beneficial effect is that three arc extinguishing chambers are arranged in sequence, and shielding covers are respectively covered corresponding to each arc extinguishing chamber, so that the distance between adjacent arc extinguishing chambers can be effectively reduced, and the axial size of the entire circuit breaker can be reduced.
  • Figure 1 is a schematic structural diagram of an embodiment of a circuit breaker provided by this application.
  • Fig. 2 is a schematic diagram of the structure of the arc extinguishing chamber with a shielding cover on the top cover of Fig. 1;
  • Fig. 3 is a schematic diagram of the structure of the arc extinguishing chamber shown in Fig. 2 after removing a single sub-cover;
  • Figure 4 is a half cross-sectional view of the arc extinguishing chamber shown in Figure 2;
  • FIG. 5 is a schematic diagram of the structure of the shielding cover in FIG. 2;
  • Fig. 6 is a schematic diagram of the connection structure between the shielding cover and the arc extinguishing chamber at the end of the insulated main shaft in Fig. 1 and the insulated frame;
  • FIG. 7 is a partial structural diagram of an embodiment of the gas insulated switchgear provided by this application.
  • first and “second” and other relational terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between.
  • the terms “include”, “include” or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment. Without more restrictions, the element defined by the sentence “including a" does not exclude the existence of other identical elements in the process, method, article, or equipment that includes the element.
  • Embodiment 1 of the circuit breaker of this application is a diagrammatic representation of the circuit breaker of this application.
  • the circuit breaker 100 in this embodiment can be installed in a gas box 400 of a gas insulated switchgear such as a ring network cabinet as shown in FIG. 7, and the circuit breaker 100 is operated by an operation installed outside the gas box 400
  • the mechanism 101 actuates to realize the opening and closing operations, and the external lead rows of the arc extinguishing chambers on the circuit breaker are conductively connected to the corresponding incoming bushings 300 through the incoming branch row 200, and the wiring bushings are used as external terminals to connect to the outside.
  • the cables are conductively connected, connect the ring main unit to the power grid to realize the normal operation of the ring main unit.
  • the air box 400 is filled with environmental protection gas, specifically dry air or nitrogen, etc., as long as the environmental protection requirements are met.
  • this embodiment provides a new type of circuit breaker
  • the structure of the device specifically, a corresponding shielding cover is provided on the top of the arc extinguishing chamber of each phase, which plays the role of internal shielding electric field and uniform electric field on the outer peripheral surface.
  • the circuit breaker in this embodiment includes an external insulating frame 1.
  • a three-phase arc extinguishing chamber 3 is installed in the insulating frame 1.
  • the three-phase arc extinguishing chambers 3 are arranged in sequence along the axial direction of the insulating main shaft 4. Spaced arrangement.
  • the insulating frame 1 here includes insulating side plates 13 on both sides, supporting plates 12 at both ends, and a limiting plate 11 in the middle.
  • the limiting plate 11 is clamped and fixed to the two insulating side plates 13, and the supporting plate 12 is fixed by screws.
  • the connecting structure is connected with the two insulating side plates to form an integral frame.
  • the insulating side plates, support plates and limit plates here are all insulating materials.
  • the bottom connection structure includes a support seat, the support seat is provided with support arms inserted on the insulating side plates on both sides, and the support arms are fixedly connected with the insulating side plates on both sides by connecting screws, and the corresponding arc extinguishing chamber supports Assembled on the support base, and then supported and placed on the insulating frame.
  • the bottom connection structure can also adopt the structure adopted in the Chinese utility model patent with the authorized announcement number CN206135290U cited in the background art.
  • the arc extinguishing chamber 2 includes an arc extinguishing chamber housing 28, which is an insulating housing, and the arc extinguishing chamber housing 28 is provided with corresponding moving contacts and static
  • the movable contact is driven by the movable conductive rod 26 to move up and down to realize the opening and closing operation of the arc extinguishing chamber, and the static contact is conductively connected to the static lead 27 fixedly assembled at the bottom of the arc extinguishing chamber.
  • a conductive connecting block 20 is fixedly assembled on the moving conductive rod 26, and the conductive connecting block 20 is conductively connected to the external lead bar 22, where the external lead bar 22 is used for conductive connection with the corresponding incoming branch row. It should be noted that because The conductive connection block 20 is reciprocally movable following the moving conductive rod 26, and the end of the external lead bar 22 connected to the corresponding incoming branch row is fixed. Therefore, the external lead bar 22 needs to be provided with a conductive soft connection 21, In order to ensure the normal connection, the conductive soft connection is specifically the prior art, which will not be repeated here.
  • the movable conductive rod 26 is assembled in the arc extinguishing chamber housing 28 to reciprocate up and down, and the movable conductive rod 26 penetrates upward from the top of the arc extinguishing chamber 2, and the conductive connecting block 20 is actually assembled At the position where the movable conductive rod 26 penetrates the arc extinguishing chamber housing 28.
  • a transmission mechanism is drivingly connected to the movable conductive rod 26, and the transmission mechanism is drivingly connected to the insulated main shaft 4.
  • the insulated main shaft 4 drives the movable conductive rod 26 to reciprocate up and down through the transmission mechanism.
  • the transmission mechanism includes a cam 25, which is fixedly assembled on the insulating main shaft 4, and the cam 25 is provided with a cam groove.
  • the moving conductive rod 26 A roller 24 is mounted on it, and the roller 24 is rolled and assembled in the cam groove.
  • the rotating main shaft 4 drives the conductive rod 26 to move up and down through the cam 25 and the roller 24.
  • the structure can be referred to the transmission structure adopted in the Chinese utility model patent with the authorized announcement number CN206135290U, which will not be described in detail here.
  • an opening spring 23 is fitted on the moving conductive rod 26, and the opening spring 23 applies an elastic force to the movable conductive rod 26 to drive it upward to control the opening operation of the arc extinguishing chamber 2.
  • the structure of this part It can be called an exposed conductive part, that is, the part of the transmission mechanism and the movable conductive rod 26 that is conductive and exposed to the arc extinguishing chamber housing 28 is defined as the exposed conductive part of the arc extinguishing chamber 2.
  • the external structure of these exposed conductive parts has sharp points, It is easy to have a locally higher electric potential during the conductive connection.
  • a shielding cover 3 is provided corresponding to each arc extinguishing chamber 2, and the shielding cover 3 is electrically connected to the exposed conductive part of the corresponding arc extinguishing chamber 2 and is arranged in Corresponding to the exposed conductive part of the arc extinguishing chamber 2, the electric field can be evened.
  • the tips of the exposed conductive parts are wrapped in the shield 3, and the local higher potentials of these tips are shielded by the shield 3, and the shield 3 includes a smooth outer surface, which is used for uniform electric field, and Compared with the previous higher potential at the tip, the potential on the outer surface of the shield 3 is relatively small, which reduces the impact of the local high potential on the external environment of the entire arc extinguishing chamber 2.
  • the shield 3 is outside The surface potential is relatively low, and on the premise of satisfying the insulation interval performance, the distance between adjacent arc extinguishing chambers 2 can be greatly shortened, and the axial size of the circuit breaker can be reduced, thereby facilitating the miniaturization of the entire circuit breaker.
  • the shielding cover 3 is specifically formed by two sub-covers 31 that are butt-assembled together.
  • the two sub-covers 31 have the same structure, which can reduce mold types and reduce costs.
  • Fastening mounting holes 34 are respectively provided on the two sub-covers 31, and when the two sub-covers 31 are butted and assembled, the fixing bolts 5 pierced in the fastening mounting holes 34 are used to realize the fastening and assembly.
  • the shielding cover 3 is provided with a spindle hole 37 for the insulating spindle 4 to pass through.
  • a spindle hole 37 is provided on the two sub-cover bodies 31 respectively.
  • the shielding cover 3 is also provided with lead row perforations for the gap of the external lead row 22 to pass through to ensure the normal conductive connection of the arc extinguishing chamber 2, where the lead row perforations are formed by the two sub-shield bodies 31 The corresponding trough structure is assembled.
  • a heat dissipation through hole 33 is provided on the top of the shielding cover 3.
  • the shielding cover 3 is assembled by two sub-covers 31, as shown in FIG. 5, in the two sub-covers 31
  • Corresponding radiating grooves 313 are respectively arranged on the top and assembled.
  • the heat dissipation grooves 313 arranged at intervals in turn form a wave-like structure on the top of the sub-cover body 31, which is convenient for processing and does not affect the shielding cover 3.
  • the pressure equalization performance is provided on the top of the shielding cover 3.
  • a spindle support frame 32 is fixedly installed on the insulating frame 1.
  • the spindle support frame 32 has a spindle support hole, and the rotatably support of the insulated spindle 4 is installed in the spindle support hole, so that the insulated spindle 4 is supported and installed in the spindle support hole.
  • the two sub-cover bodies 31 cooperate with each other to clamp the pressing spindle support frame 32, so that the shielding cover 3 is fixed on the spindle support frame 32.
  • the main shaft support frame 32 is usually a metal part, which plays a supporting role as well as a conductive role.
  • the supporting role is mainly used to ensure the support strength, and the conductive part is used to achieve a conductive connection when in contact with the shielding cover 3. It is convenient to realize the conductive connection between the shielding cover 3 and the exposed conductive part of the arc extinguishing chamber 2.
  • non-metallic materials can also be used.
  • the main shaft support frame 32 is an inverted V-shaped structure as a whole.
  • the main shaft support frame 32 includes two inclined side arms transitionally connected at one end, and the lower ends of each inclined side wall are respectively integrally transitioned with support arms, and the support arms extend downward.
  • On the support arm there are two support connection parts arranged at intervals along the up and down direction.
  • the support connection parts are specifically two support connection blocks.
  • the two support connection blocks are respectively provided with threaded holes 322, corresponding to the two support connection parts, on the shielding cover.
  • Corresponding support holes 36 are provided for the fastening bolts connected to the threaded holes 322 to pass through, so as to realize the fixed connection between the main shaft support frame and the corresponding insulating frame.
  • corresponding supporting and mounting parts are provided on the insulating frame 1.
  • the two insulating side plates 13 are respectively provided with insulating protrusions on the sides facing the shielding cover 3.
  • a through bolt hole is provided on the insulating protrusion 130, and the bolt hole corresponds to the threaded hole 322, and is used to insert the fastening bolt 6, and the fastening bolt 6 inserted on the insulating side plate 13 is used to support The mounting part and the supporting connection part are fixedly connected together, and then the shield cover 3 is supported and installed on the insulating frame.
  • the main shaft support frame 32 is a conductive element, and the main shaft support frame 32 is electrically connected to the shielding cover 3 and the exposed conductive parts of the corresponding arc extinguishing chamber 2 to realize the connection between the shielding cover 3 and the exposed conductive parts of the corresponding arc extinguishing chamber 2 Conductive connection.
  • a conductive slide groove 321 is provided on the spindle support frame 32, and the conductive slide groove 321 is conductively connected to the conductive pin on the movable conductive rod 26 of the corresponding arc extinguishing chamber 2 to realize the spindle support.
  • the sliding conductive connection between the frame 32 and the exposed conductive part further ensures the conductive connection between the shielding cover 3 and the exposed conductive part, ensuring the effect of a uniform electric field.
  • the support connection part is located in the shielding cover 3.
  • the insulating bump 130 can be inserted into the support In the perforation 36, in order to reduce the influence of the insulating side plate on the shielding cover 3, a gap is left between the insulating bump 130 and the hole wall supporting the perforation 36.
  • the two-part cover body 31 clamps and fixes the spindle support frame 32 when assembling, for the convenience of assembly, there are three insertion and positioning assembly between the spindle support frame 32 and the shielding cover 3, one of which is the upper insertion and positioning assembly.
  • the other two locations are the lower plug-in positioning assembly, and the two lower plug-in positioning assembly and the upper positioning plug-in assembly are arranged in a square shape to form a three-point positioning, which is convenient for improving the stability of the sub-cover body 31 during assembly.
  • a plug-in barrel structure is provided on the top of the main shaft support frame 32.
  • the inner hole of the plug-in barrel structure forms a corresponding main shaft support hole, and an insulated main shaft is assembled with a rotatable support.
  • the two-part cover body 31 is assembled and clamped to hold the main shaft support frame.
  • the corresponding end of the plug-in barrel structure is positioned and inserted into the main shaft hole of the shielding cover 3 to form a positioning assembly of the shielding cover 3 and the main shaft support frame 32.
  • the two split covers 31 are respectively provided with a main shaft perforation, when the two split covers 31 are assembled, it is convenient to guide the split cover 31 to be assembled through the mating of the main shaft perforation and the plug-in barrel structure.
  • each lower plug positioning assembly includes a positioning plug portion and an adapter plug portion.
  • the positioning plug portion is arranged on the spindle support frame 32, and the adapter plug portion is arranged on Shield cover 3.
  • the positioning insertion part here is the positioning through hole 323, and the adapting insertion part is the positioning boss 311.
  • the main shaft support frame 32 and the two-part cover body 31 are correspondingly sleeved on the insulating main shaft 4, and then the two part cover bodies 31 are joined together, and the two parts cover body 31 are fixed by the fixing bolt 5 so that the two-part cover body 31
  • the main shaft support frame 32 is clamped and fixed to form the entire shielding cover 3.
  • the insulating bumps 130 on the insulating side plate 13 are correspondingly inserted into the support through holes 36, and the fastening bolts 6 are inserted to fix the support connection part on the spindle support frame 31 and the support installation part on the insulating frame 1, and the shield cover 3
  • the support is installed on the insulating frame 1.
  • the shielding cover 3 covers the part of the movable conductive rod 26 exposed from the arc extinguishing chamber housing 28 and the transmission mechanism, effectively reducing the influence of the higher potential at the tip of the exposed conductive part, realizing the effect of a uniform electric field, and effectively shortening the adjacent
  • the distance between the arc extinguishing chambers 2 can further shorten the length of the insulating main shaft, which is in line with the development trend of miniaturization of circuit breakers.
  • the external lead bar can be used as an incoming line or an outgoing line, which can be determined according to actual needs.
  • Embodiment 2 of the circuit breaker of this application is a diagrammatic representation of the circuit breaker of this application.
  • the spindle support frame 32 is a conductive member. Therefore, the support connection portion on the spindle support frame 32 is arranged in the shielding cover 3.
  • the spindle The support frame 32 is an insulator. Under the condition that the support strength is satisfied, the support connection part on the main shaft support frame 32 can be designed as a support shaft passing through the shielding cover 3, and the support shaft can be clamped to the corresponding insulation side plate Hole snap-fit assembly.
  • a conductive soft connection structure is provided between the shielding cover 3 and the movable conductive rod 26 to ensure Conductive connection.
  • Embodiment 3 of the circuit breaker of this application is a diagrammatic representation of the circuit breaker of this application.
  • Embodiment 1 under the condition of not affecting the uniform electric field, the shielding cover 3 is provided with heat dissipation through holes.
  • the heat dissipation through holes can also be omitted.
  • Embodiment 4 of the circuit breaker of this application is a diagrammatic representation of the circuit breaker of this application.
  • Embodiment 1 The main difference from Embodiment 1 lies in the following:
  • the two-part cover body 31 is provided with a complete spindle perforation, and the two-part cover body 31 is respectively provided with a groove structure to form a lead row perforation by assembling.
  • the two sub-covers 31 are arranged on the left and right, each sub-cover 31 is provided with a complete lead row perforation, and the two sub-covers 31 are respectively provided with groove-shaped structures to be assembled to form the shielding cover 3
  • the main shaft is perforated, as long as the two-part cover body 31 can be clamped and fixed on the main shaft support frame 32 when assembling, so as to realize the spaced assembly with the insulating frame 1 and the arc extinguishing chamber housing 28.
  • Embodiment 5 of the circuit breaker of the application is a diagrammatic representation of the circuit breaker of the application.
  • Embodiment 1 The main difference from Embodiment 1 lies in the following:
  • the main shaft support frame 32 and the shielding cover 3 form three plug-in positioning assemblies, so that the stability is better.
  • the upper plug-in positioning assembly formed by the plug-in barrel structure and the main shaft hole of the shielding cover 3 may be provided, and the two lower plug-in positioning assemblies are omitted.
  • the upper plug-in positioning assembly can also be omitted.
  • manual operation by workers is mainly required, which requires a higher level of assembly by workers.
  • the present application also provides an embodiment of a gas insulated switchgear.
  • the structure of the gas insulated switchgear in this embodiment is shown in FIG. 7 and includes a gas box 400 in which a circuit breaker 100 is provided. Driven by the operating mechanism 101 installed outside the air box 400 to realize opening and closing operations, and the external lead rows of each arc extinguishing chamber 2 on the circuit breaker are electrically connected to the corresponding inlet bushing 300 through the incoming branch row 200 Connection, when the wiring sleeve is used as an external terminal to connect with an external cable, the switch cabinet is connected to the power grid to realize the normal operation of the switch cabinet.
  • the switch cabinet here is specifically a ring network cabinet.
  • the structure of the circuit breaker here is the same as the structure of the circuit breaker in Embodiment 1 of the above circuit breaker, and will not be described in detail here.
  • circuit breaker structure in any one of the above-mentioned circuit breaker embodiments 2 to 5 can also be adopted, which will not be repeated here.

Abstract

一种断路器(100)及使用该断路器(100)的气体绝缘开关柜,断路器(100)中针对灭弧室(2)的外露导电部分设置屏蔽罩(3),屏蔽罩(3)固定在主轴支撑骨架(32)上,以使屏蔽罩(3)与绝缘框架(1)之间以及屏蔽罩(3)与灭弧室壳体(28)之间均间隔布置,并且屏蔽罩(3)与灭弧室(2)的外露导电部分导电连接,并罩设于该灭弧室(2)的外露导电部分外,屏蔽罩(3)具有光滑的外表面,用于均匀电场;屏蔽罩(3)上设有主轴穿孔(37),供绝缘主轴(4)间隙穿过;屏蔽罩(3)上还设有引线排穿孔。在使用时,利用屏蔽罩(3)来屏蔽内部电场,并均匀外部电场,有效降低外露导电部分的尖端处的较高电势的影响。

Description

一种断路器及使用该断路器的气体绝缘开关柜
相关申请的交叉引用
本申请基于申请号为201911208227.4、申请日为2019年11月30日的中国专利申请提出,并要求该中国专利申请的优先权,该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及电力配电技术领域,特别涉及一种断路器及使用该断路器的气体绝缘开关柜。
背景技术
SF6气体是一种优良的电工气体,同时也是一种温室气体,目前,一些国家已经开始对SF6的使用征收碳税,国内外SF6气体的使用会受到越来越多的限制,因此,对于气体绝缘全封闭环网柜,去SF6化具有重要的环境保护意义,并成为发展方向。考虑到环保问题,目前越来越多的环网柜采用环保型气体(如干燥空气、氮气等),如授权公告号为CN206135290U的实用新型专利中公开的环保气体绝缘环网柜,其内设置断路器,断路器包括框架和断路器开关主回路,框架包括位于前后两端的两断路器固定板以及位于左右两侧的断路器夹板,断路器固定板和断路器夹板通过螺栓固定装配,断路器开关主回路包括软连接、灭弧室及隔离上静触头,断路器开关主回路对应布置三相,各相灭弧室的传动机构与断路器转轴传动连接,以由断路器操动机构通过断路器转轴驱动灭弧室内的动触头动作,实现灭弧室分合闸操作。断路器转轴由对应三相灭弧室分别布置的主轴支撑骨架支撑,主轴支撑骨架固定安装在断路器夹板上,主轴支撑骨架上设有支撑孔,断路器转轴穿过支撑孔,以由主轴支撑骨架支撑断路器转轴。
实际上,对于灭弧室来讲,各相灭弧室的传动机构传动连接有动导电杆, 断路器转轴转动时,通过传动机构、动导电杆驱动相应动触头往复动作,动导电杆与软连接结构导电连接,软连接结构作为外接引线排的一部分存在,而外接引线排则用于穿出断路器的框架,以用于与环网柜上的相应接线端子(如进线套管)导电连接,实现外部接线,满足环网柜的正常使用要求。
上述三相灭弧室沿绝缘主轴的轴向依次间隔布置,由于各相灭弧室的动导电杆及传动机构外露于灭弧室外,需要设计三相灭弧室的间距,以满足绝缘要求。但是,由于环保型气体的绝缘性能较SF6的绝缘效果差,为提高相邻灭弧室之间绝缘性能,在断路器转轴上安装增爬伞裙,通过增爬伞裙提高相邻灭弧室之间的绝缘性能。
实际上,相比于不设置增爬伞裙的方式,这种在断路器转轴上设置增爬伞裙的方式,可以在不增加相邻灭弧室间距的情况下提高绝缘性能,或者,在满足相邻灭弧室绝缘性能的基础上可以缩小相邻相灭弧室的间距。但是,对于各相灭弧室来讲,动导电杆及传动机构等外露的导电部分存在尖端结构,这些尖端结构往往会形成较高的电势,尖端处的较高电势作为相应灭弧室的电势标准,直接决定了相邻灭弧室的间距,而在断路器转轴上设置增爬伞裙的方式对于尖端处的较高电势影响较小,不能有效降低尖端处较高电势的影响,因此这种在断路器转轴上设置增爬伞裙的方式对于减小相邻灭弧室间隔的作用较小,不能有效缩短相邻灭弧室的间隔,不符合断路器小型化设计发展方向。
发明内容
本申请的目的在于提供一种断路器,以解决现有技术中断路器绝缘主轴上设置冷缩绝缘件不能降低灭弧室外露电机尖端处较高电势影响的技术问题;同时,本申请还提供一种使用断路器的气体绝缘开关柜。
本申请提供的断路器的技术方案:一种断路器,包括:
绝缘框架;
灭弧室,安装在所述绝缘框架中,所述灭弧室包括灭弧室壳体和动导电杆,所述动导电杆沿上下方向往复移动的装配在所述灭弧室壳体中,所述动导电杆 向上穿出所述灭弧室壳体,所述动导电杆穿出所述灭弧室壳体的部分与外接引线排导电连接;
主轴支撑骨架,支撑安装于所述绝缘框架上,所述主轴支撑骨架具有主轴支撑孔;
绝缘主轴,可回转的支撑装配在所述主轴支撑孔中,所述绝缘主轴通过传动机构驱动所述动导电杆沿上下方向往复移动;
将所述动导电杆露出所述灭弧室壳体的导电部分和所述传动机构定义为所述灭弧室的外露导电部分;
屏蔽罩,由对接拼装在一起的两个分罩体形成,两个所述分罩体夹持所述主轴支撑骨架以将所述屏蔽罩固定在所述主轴支撑骨架上;所述屏蔽罩与所述灭弧室的外露导电部分导电连接,并罩设于所述灭弧室的外露导电部分外,所述屏蔽罩具有光滑的外表面,用于均匀电场;所述屏蔽罩与所述绝缘框架之间以及所述屏蔽罩与所述灭弧室壳体之间均间隔布置;所述屏蔽罩上设有主轴穿孔,供所述绝缘主轴间隙穿过;所述屏蔽罩上还设有引线排穿孔,供相应的所述灭弧室的外接引线排间隙穿过。
有益效果是:本申请所提供的断路器中,由屏蔽罩罩设于灭弧室的外露导电部分外,利用主轴穿孔、引线排穿孔等结构,穿装绝缘主轴及外接引线排,以保证灭弧室的正常工作。同时,利用屏蔽罩的屏蔽作用,有效消除灭弧室的外露导电部分尖端处较高电势的影响,而且,由屏蔽罩光滑的外周面均匀电场,进而有效避免外露导电部分的尖端处的较高电势的影响,屏蔽罩外表面上的电势较为均匀,此时,明显会小于外露导电部分的尖端处的高电势,有效改善灭弧室周边的电气绝缘性能,可有效降低绝缘间隔要求,进而可减小断路器整体尺寸,符合断路器的小型化发展趋势。
另外,利用两分罩体夹持主轴支撑骨架的方式安装屏蔽罩,屏蔽罩与绝缘框架、灭弧室壳体分别间隔布置,屏蔽罩不与绝缘框架、灭弧室壳体接触,有效避免屏蔽罩与绝缘框架、灭弧室壳体接触时产生的电场畸变问题,既避免对屏蔽罩内部电场造成影响,又避免对绝缘框架及灭弧室壳体的绝缘性能造成影 响。
作为进一步优化的方案,所述主轴支撑骨架上设有插接筒结构,所述插接筒结构的内孔形成所述主轴支撑孔,两个所述分罩体拼装夹持所述主轴支撑骨架时,所述插接筒结构的相应端部定位插装于所述屏蔽罩的主轴穿孔中。
有益效果是:主轴支撑骨架上的插接筒结构,其内部装配主轴支撑孔,其外部与主轴穿孔装配,进而方便实现绝缘主轴与屏蔽罩上的主轴穿孔的间隙配合。插接筒结构既用于形成主轴支撑孔,又用于定位装配屏蔽罩,在简化整体的情况下,集中实现了绝缘主轴、主轴支撑骨架及屏蔽罩三者的定位装配。
作为进一步优化的方案,所述插接筒结构与所述屏蔽罩的主轴穿孔定位插装以形成上插接定位装配,所述主轴支撑骨架和所述屏蔽罩之间还设有两处下插接定位装配,两处所述下插接定位装配和所述上定位插接装配呈品字形布置,每处所述下插接定位装配分别包括定位插接部和适配插接部,所述定位插接部设置于所述主轴支撑骨架上,所述适配插接部设置于所述屏蔽罩上。
有益效果是:利用上插接定位装配和两侧下插接定位装配,形成分布式定位,方便分罩体与主轴支撑骨架的定位装配,提高装配效率。
作为进一步优化的方案,所述主轴支撑骨架上设有支撑连接部,所述绝缘框架上设有支撑安装部,所述屏蔽罩上设有支撑穿孔,供所述支撑连接部穿出或供所述支撑安装部间隙穿入,以使所述支撑连接部和所述支撑安装部固定连接,进而使所述主轴支撑骨架支撑安装在所述绝缘框架上。
有益效果是:利用屏蔽罩上的支撑穿孔,供相应主轴支架骨架上的支撑连接部穿出或供断路器绝缘框架上的支撑安装部间隙穿入,方便装配。
作为进一步优化的方案,所述主轴支撑骨架为导电件,所述支撑连接部位于所述屏蔽罩内,所述绝缘框架包括绝缘侧板,所述绝缘侧板朝向所述屏蔽罩的侧面上凸设有绝缘凸块,所述绝缘凸块作为所述支撑安装部插装入所述支撑穿孔中,并与所述支撑穿孔的孔壁留有间隙。
有益效果是:利用绝缘凸块插入支撑穿孔中,避免支撑连接部外露而影响电场分布。
作为进一步优化的方案,所述主轴支撑骨架为导电件,所述主轴支撑骨架为导电件,所述主轴支撑骨架与所述屏蔽罩、相应的所述灭弧室的外露导电部分分别导电连接,以使得所述屏蔽罩通过所述主轴支撑骨架与相应的所述灭弧室的外露导电部分导电连接。
有益效果是:采用主轴支撑骨架实现屏蔽罩与灭弧室的外露导电部分的导电连接,主轴支撑骨架在起到支撑作用的情况下,同时实现导电连接,进而可简化内部结构。
作为进一步优化的方案,所述主轴支撑骨架上设有导电滑槽,所述导电滑槽与所述动导电杆上设有的导电销滑动导电配合,以使得所述主轴支撑骨架与相应的所述灭弧室的外露导电部分滑动导电连接。
有益效果是:利用导电滑槽实现主轴支撑骨架和外露导弹部分的滑动导电连接,加工制作较为方便。
作为进一步优化的方案,所述主轴穿孔位于所述屏蔽罩的上部,所述屏蔽罩的顶部设有散热通孔。
有益效果是:屏蔽罩设置散热通孔,进而提高整个屏蔽罩的散热性能。
作为进一步优化的方案,所述灭弧室沿所述绝缘主轴轴向依次间隔布置有三个,各所述灭弧室的顶端分别罩设有所述屏蔽罩。
有益效果是:灭弧室依次布置三个,并且对应各灭弧室分别罩设屏蔽罩,这样可以有效减少相邻灭弧室的间距,缩小整个断路器的轴向尺寸。
本申请所提供的气体绝缘开关柜的技术方案是:一种气体绝缘开关柜,包括:
气箱,用于密封绝缘气体;
布置于所述气箱中的断路器,所述断路器采用上述所述的断路器。
有益效果是:本申请所提供的气体绝缘开关柜的断路器中,由屏蔽罩罩设于灭弧室的外露导电部分外,利用主轴穿孔、引线排穿孔等结构,穿装绝缘主轴及外接引线排,以保证灭弧室的正常工作。同时,利用屏蔽罩的屏蔽作用,有效消除灭弧室的外露导电部分尖端处较高电势的影响,而且,由屏蔽罩光滑 的外周面均匀电场,进而有效避免外露导电部分的尖端处的较高电势的影响,屏蔽罩外表面上的电势较为均匀,此时,明显会小于外露导电部分的尖端处的高电势,有效改善灭弧室周边的电气绝缘性能,可有效降低绝缘间隔要求,进而可减小断路器整体尺寸,符合断路器的小型化发展趋势,也有利于开关柜的小型化设计。
另外,利用两分罩体夹持主轴支撑骨架的方式安装屏蔽罩,屏蔽罩与绝缘框架、灭弧室壳体分别间隔布置,屏蔽罩不与绝缘框架、灭弧室壳体接触,有效避免屏蔽罩与绝缘框架、灭弧室壳体接触时产生的电场畸变问题,既避免对屏蔽罩内部电场造成影响,又避免对绝缘框架及灭弧室壳体的绝缘性能造成影响。
作为进一步优化的方案,所述主轴支撑骨架上设有插接筒结构,插接筒结构的内孔形成所述的主轴支撑孔,所述两分罩体拼装夹持所述主轴支撑骨架时,插接筒结构的相应端部定位插装于所述屏蔽罩的主轴穿孔中。
有益效果是:主轴支撑骨架上的插接筒结构,其内部装配主轴支撑孔,其外部与主轴穿孔装配,进而方便实现绝缘主轴与屏蔽罩上的主轴穿孔的间隙配合。插接筒结构既用于形成主轴支撑孔,又用于定位装配屏蔽罩,在简化整体的情况下,集中实现了绝缘主轴、主轴支撑骨架及屏蔽罩三者的定位装配。
作为进一步优化的方案,所述插接筒结构与屏蔽罩的主轴穿孔定位插装以形成上插接定位装配,所述主轴支撑骨架和所述屏蔽罩之间还设有两处下插接定位装配,两处下插接定位装配和所述上定位插接装配呈品字形布置,每处下插接定位装配分别包括定位插接部和适配插接部,定位插接部设置于所述主轴支撑骨架上,适配插接部设置于所述屏蔽罩上。
有益效果是:利用上插接定位装配和两侧下插接定位装配,形成分布式定位,方便分罩体与主轴支撑骨架的定位装配,提高装配效率。
作为进一步优化的方案,所述主轴支撑骨架上设有支撑连接部,所述绝缘框架上设有支撑安装部,所述屏蔽罩上设有支撑穿孔,供所述支撑连接部穿出或供所述支撑安装部间隙穿入,以使支撑连接部和支撑安装部的固定连接,进 而使主轴支撑骨架支撑安装在所述绝缘框架上。
有益效果是:利用屏蔽罩上的支撑穿孔,供相应主轴支架骨架上的支撑连接部穿出或供断路器绝缘框架上的支撑安装部间隙穿入,方便装配。
作为进一步优化的方案,所述主轴支撑骨架为导电件,所述支撑连接部位于所述屏蔽罩内,所述绝缘框架包括绝缘侧板,该绝缘侧板的朝向所述屏蔽罩的侧面上凸设有绝缘凸块,该绝缘凸块作为所述支撑安装部插装入所述支撑穿孔中,并与所述支撑穿孔的孔壁留有间隙。
有益效果是:利用绝缘凸块插入支撑穿孔中,避免支撑连接部外露而影响电场分布。
作为进一步优化的方案,所述主轴支撑骨架为导电件,所述主轴支撑骨架与屏蔽罩、相应灭弧室的所述外露导电部分分别导电连接,以使得屏蔽罩通过所述主轴支撑骨架与相应灭弧室的所述外露导电部分导电连接。
有益效果是:采用主轴支撑骨架实现屏蔽罩与灭弧室的外露导电部分的导电连接,主轴支撑骨架在起到支撑作用的情况下,同时实现导电连接,进而可简化内部结构。
作为进一步优化的方案,所述主轴支撑骨架上设有导电滑槽,所述导电滑槽与所述动导电杆上设有的导电销滑动导电配合,以使得主轴支撑骨架与相应灭弧室的所述外露导电部分滑动导电连接。
有益效果是:利用导电滑槽实现主轴支撑骨架和外露导弹部分的滑动导电连接,加工制作较为方便。
作为进一步优化的方案,所述主轴穿孔位于所述屏蔽罩的上部,所述屏蔽罩的顶部设有散热通孔。
有益效果是:屏蔽罩设置散热通孔,进而提高整个屏蔽罩的散热性能。
作为进一步优化的方案,所述灭弧室沿所述绝缘主轴轴向依次间隔布置有三个,各灭弧室顶端分别罩设有所述的屏蔽罩。
有益效果是:灭弧室依次布置三个,并且对应各灭弧室分别罩设屏蔽罩,这样可以有效减少相邻灭弧室的间距,缩小整个断路器的轴向尺寸。
附图说明
图1为本申请所提供的断路器的一种实施例的结构示意图;
图2为图1中顶部罩设有屏蔽罩的灭弧室的结构示意图;
图3为图2所示灭弧室去除单个分罩体后的结构示意图;
图4为图2所示灭弧室的半剖视图;
图5为图2中屏蔽罩的结构示意图;
图6为图1中处于绝缘主轴端部的屏蔽罩及灭弧室与绝缘框架连接结构示意图;
图7为本申请所提供的气体绝缘开关柜的一种实施例的局部结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本申请进行进一步详细说明。应当理解,此处所描述的具体实施例仅用以解释本申请,并不用于限定本申请,即所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此,以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围,而是仅仅表示本申请的选定实施例。基于本申请的实施例,本领域技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都属于本申请保护的范围。
需要说明的是,术语“第一”和“第二”等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所 述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以下结合实施例对本申请的特征和性能作进一步的详细描述。
本申请断路器的实施例1:
如图7所示,该实施例中的断路器100可如图7所示,安装于气体绝缘开关柜如环网柜的气箱400中,断路器100由安装于气箱400外的操动机构101驱动动作,实现分合闸操作,并且,断路器上各灭弧室的外接引线排通过进线分支排200与相应的进线套管300导电连接,在接线套管作为外接端子与外部线缆导电连接时,将环网柜接入电网中,实现环网柜的正常工作。
本实施例中,为符合环保型要求,气箱400中充入环保型气体,具体可充入干燥空气或氮气等,满足环保要求即可。
因为环保型气体相比六氟化硫绝缘性能稍差,为有效提高断路器中各相灭弧室的绝缘间隔性能,有效减少断路器的轴向尺寸,本实施例提供了一种新型的断路器结构,具体是在各相灭弧室的顶部罩设相应屏蔽罩,起到内部屏蔽电场、外周面均匀电场的作用。
本实施例中断路器的结构具体如下:
如图1至图7所示,本实施例中的断路器包括外部的绝缘框架1,在绝缘框架1中安装有三相灭弧室3,三相灭弧室3沿绝缘主轴4的轴向依次间隔布置。
具体的,此处的绝缘框架1包括两侧的绝缘侧板13、两端的支撑板12和中间的限位板11,限位板11与两绝缘侧板13卡接固定,支撑板12通过螺钉连接结构与两绝缘侧板连接,进而形成整体框架。为提高断路器整体性能,此处的绝缘侧板、支撑板及限位板均为绝缘材料。
装配时,在限位板11上设有安装过孔,对应的灭弧室2插装在安装过孔中,并通过底部连接结构与两侧的绝缘侧板固定连接,实现整个灭弧室的固定装配,底部连接结构包括支撑座,支撑座上设有插装在两侧绝缘侧板上的支撑臂,且通过连接螺钉将支撑臂与两侧绝缘侧板固定连接,相应的灭弧室支撑装配在支撑座上,进而支撑放置在绝缘框架上。当然,在其他实施例中,底部连接结构 也可采用背景技术所引用的授权公告号为CN206135290U的中国实用新型专利中采用的结构。
如图2和图3所示,灭弧室2包括灭弧室壳体28,灭弧室壳体28为绝缘壳体,灭弧室壳体28中设有对应配合使用的动触头和静触头,动触头由动导电杆26驱动上下往复移动,实现灭弧室的分合闸操作,静触头则与灭弧室底部固定装配有的引出静触头27导电连接。
在动导电杆26上固定装配有导电连接块20,导电连接块20与外接引线排22导电连接,此处的外接引线排22用于与相应进线分支排导电连接,需要说明的是,由于导电连接块20是跟随动导电杆26往复活动的,而外接引线排22与对应的进线分支排相连接的端部则是固定的,所以,外接引线排22上需设置导电软连接21,以保证正常连接,导电软连接具体为现有技术,在此不再赘述。
对于动导电杆26来讲,动导电杆26沿上下方向往复移动的装配在灭弧室壳体28中,且动导电杆26自灭弧室2顶端向上穿出,导电连接块20实际上装配在动导电杆26穿出灭弧室壳体28的部位上。并且,在动导电杆26上传动连接有传动机构,传动机构于绝缘主轴4传动连接,使用时,由绝缘主轴4通过传动机构驱动动导电杆26上下往复移动。
在本实施例中,因为绝缘主轴4相对灭弧室2居中布置,传动机构包括凸轮25,凸轮25固定装配在绝缘主轴4上,凸轮25上设有凸轮槽,对应的,在动导电杆26上装配有滚轮24,滚轮24滚动装配在凸轮槽中,这样一来,在操动机构驱动绝缘主轴4转动时,旋转主轴4通过凸轮25、滚轮24驱动动导电杆26上下往复移动。实际上,该结构可参见授权公告号为CN206135290U的中国实用新型专利中采用的传动结构,在此不再具体赘述。
并且,为提高分闸速度,在动导电杆26上套装有分闸弹簧23,分闸弹簧23向动导电杆26施加驱使其向上运动而控制灭弧室2分闸操作的弹性作用力。
需要说明的是,上述的传动机构及动导电杆与外接引线排的结构均为现有技术,在此不再赘述。
本实施例中,对于灭弧室2来讲,由于动导电杆26及传动机构均为导电部 分,并且,动导电杆26的一部分及传动机构均露出灭弧室壳体28外,这部分结构可称为外露导电部分,也就是将传动机构及动导电杆26中的导电且露出灭弧室壳体28的部分定义为灭弧室2的外露导电部分,这些外露导电部分外部结构存在尖端,容易在导电连接时出现局部较高电势。
为解决局部尖端高电势带来的影响,本实施例中,对应于各灭弧室2分别设置屏蔽罩3,该屏蔽罩3与相应灭弧室2的外露导电部分导电连接,并罩设于相应灭弧室2的外露导电部分外,进而可均匀电场。这样一来,外露导电部分的尖端被包在屏蔽罩3内部,这些尖端的局部较高电势被屏蔽罩3屏蔽掉,而屏蔽罩3包括光滑的外表面,光滑外表面用于均匀电场,与之前尖端处的较高电势相比,屏蔽罩3外表面上的电势相对较小,降低局部高电势对整个灭弧室2外接环境的影响,对于三相断路器来讲,由于屏蔽罩3外表面电势相对较低,在满足绝缘间隔性能的前提下,即可大幅缩短相邻灭弧室2的间距,可减小断路器的轴向尺寸,进而有利于整个断路器的小型化设计。
本实施例中,屏蔽罩3具体由对接拼装在一起的两个分罩体31形成,为方便加工制作,两个分罩体31的结构相同,这样可减少模具类型,降低成本。在两个分罩体31上分别设有紧固安装孔34,当两分罩体31对接拼装时,利用穿装在紧固安装孔34中的固定螺栓5实现紧固装配。
为保证正常工作,如图5所示,屏蔽罩3上设有主轴穿孔37,供绝缘主轴4间隙穿过,在绝缘主轴4驱动凸轮25转动时,并不会对屏蔽罩3造成影响。本实施例中,两个分罩体31上分别设有一个主轴穿孔37。
同样的,屏蔽罩3上还设有引线排穿孔,供外接引线排22间隙穿过,以保证灭弧室2的正常导电连接,此处的引线排穿孔则由两个分罩体31上的相应槽型结构拼装而成。
为提高散热性能,在屏蔽罩3的顶部设有散热通孔33,实际上,由于屏蔽罩3由两个分罩体31拼装而成,如图5所示,在两个分罩体31的顶部分别设置相应的散热槽313拼合而成。如图1所示,散热通孔33依次间隔的分布有多个,这样,依次间隔布置的散热槽313在分罩体31的顶部形成类似波浪形结构, 加工方便,也不会影响屏蔽罩3的均压性能。
本实施例中,在绝缘框架1上固定安装有主轴支撑骨架32,主轴支撑骨架32具有主轴支撑孔,绝缘主轴4可回转的支撑穿装在主轴支撑孔中,以使得绝缘主轴4支撑安装在绝缘框架1上。
对于屏蔽罩3来讲,两个分罩体31相互配合以夹持顶压主轴支撑骨架32,使屏蔽罩3固定在主轴支撑骨架32上。实际上,主轴支撑骨架32通常为金属件,其既起到支撑作用,又起到导电作用,支撑作用主要用于保证支撑强度,导电件则是为了与屏蔽罩3接触时实现导电连接,进而便于实现屏蔽罩3与灭弧室2的外露导电部分的导电连接。当然,在其他实施例中,如果在满足支撑强度情况下,也可采用非金属材料。
具体的,主轴支撑骨架32整体上呈倒置的V形结构,主轴支撑骨架32包括一端过渡连接的两倾斜侧臂,各倾斜侧壁的下端分别一体过渡连接有支撑臂,支撑臂向下延伸,在支撑臂上沿上下方向间隔布置有两个支撑连接部,支撑连接部具体为两个支撑连接块,两支撑连接块上分别设有螺纹孔322,对应于两支撑连接部,在屏蔽罩上设有相应的支撑穿孔36,以供与螺纹孔322连接的紧固螺栓穿过,进而实现主轴支撑骨架与相应绝缘框架的固定连接。
如图6所示,对应两支撑连接块,在绝缘框架1上设有相应的支撑安装部,本实施例中,在两绝缘侧板13的朝向屏蔽罩3的侧面上分别凸设有绝缘凸块130,此处的两绝缘凸块130作为支撑安装部用于与主轴支撑骨架32上的支撑连接部固定连接。具体的,在绝缘凸块130上设有贯穿的螺栓穿孔,该螺栓穿孔与螺纹孔322对应,用于穿装紧固螺栓6,利用穿装在绝缘侧板13上的紧固螺栓6将支撑安装部和支撑连接部固定连接在一起,进而将屏蔽罩3支撑安装在绝缘框架上。
本实施例中,主轴支撑骨架32为导电件,主轴支撑骨架32与屏蔽罩3和相应灭弧室2的外露导电部分导电连接,以实现屏蔽罩3与相应灭弧室2的外露导电部分的导电连接。具体的,如图4所示,在主轴支撑骨架32上设有导电滑槽321,该导电滑槽321与相应灭弧室2的动导电杆26上的导电销轴导电连 接,进而实现主轴支撑骨架32与外露导电部分的滑动导电连接,进而保证屏蔽罩3与外露导电部分导电连接,保证均匀电场的效果。
由于主轴支撑骨架32为导电件,为避免作为支撑连接部的支撑连接块外露而影响电场,使支撑连接部位于屏蔽罩3内,此时,在具体装配时,可使绝缘凸块130插入支撑穿孔36中,而且,为减少绝缘侧板对屏蔽罩3的影响,绝缘凸块130与支撑穿孔36的孔壁之间留有间隙。
由于两分罩体31拼装时夹持固定主轴支撑骨架32,为方便装配,在主轴支撑骨架32和屏蔽罩3之间分别设有三处插接定位装配,其中一处为上插接定位装配,另外两处为下插接定位装配,并且,两处下插接定位装配和上定位插接装配呈品字形布置,形成三点定位,便于提高分罩体31拼装时的稳定性。
在主轴支撑骨架32顶部设有插接筒结构,插接筒结构的内孔形成相应的主轴支撑孔,与用于可回转的支撑装配绝缘主轴,在两分罩体31拼装夹持主轴支撑骨架32时,由插接筒结构的相应端部定位插装于屏蔽罩3的主轴穿孔中,形成屏蔽罩3与主轴支撑骨架32的定位装配。实际上,由于两分罩体31上分别设有一个主轴穿孔,在两分罩体31拼装时,通过主轴穿孔与插接筒结构的插配,方便引导分罩体31拼装。
对于两处下插接定位装配来讲,每处下插接定位装配分别包括定位插接部和适配插接部,定位插接部设置于主轴支撑骨架32上,适配插接部设置于屏蔽罩3上。此处的定位插接部为定位通孔323,适配插接部则为定位凸台311,当两分罩体31上拼接时,两定位凸台311分别与定位通孔323插接,实现定位装配。
装配时,将主轴支撑骨架32、两分罩体31对应套装在绝缘主轴4上,然后将两个分罩体31对接拼合,固定螺栓5将两分罩体31固定,使两分罩体31夹持固定主轴支撑骨架32,形成整个屏蔽罩3。绝缘侧板13上的绝缘凸块130对应插入支撑穿孔36中,穿装紧固螺栓6,将主轴支撑骨架31上的支撑连接部和绝缘框架1上的支撑安装部固定连接,将屏蔽罩3支撑安装在绝缘框架1上。
屏蔽罩3将动导电杆26露出灭弧室壳体28的部分及传动机构罩住,有效降低外露导电部分的尖端处的较高电势的影响,实现均匀电场的作用,进而可有效缩短相邻灭弧室2的间距,进而可缩短绝缘主轴长度,符合断路器的小型化发展趋势。
需要说明的是,在断路器具体应用时,外接引线排即可作为进线排,也可作为出线排,具体可根据实际需要确定。
本申请断路器的实施例2:
其与实施例1的不同之处主要在于:实施例1中,主轴支撑骨架32为导电件,所以,将主轴支撑骨架32上的支撑连接部布置在屏蔽罩3中,本实施例中,主轴支撑骨架32为绝缘件,在满足支撑强度的情况下,可将主轴支撑骨架32上的支撑连接部设计为穿出屏蔽罩3的支撑轴,该支撑轴可与绝缘侧板上的相应卡接孔卡接装配。
另外,当主轴支撑骨架32为绝缘件,需要设置其他导电连接方式以实现动导电杆26和屏蔽罩3的导电连接,例如在屏蔽罩3和动导电杆26之间设置导电软连接结构,保证导电连接。
本申请断路器的实施例3:
其与实施例1的不同之处主要在于:实施例1中,在不影响均匀电场的情况下,在屏蔽罩3上设置散热通孔,在本实施例中,如果断路器应用电压较低,发热量不大的情况下,也可以省去散热通孔。
本申请断路器的实施例4:
其与实施例1的不同之处主要在于:实施例1中,两分罩体31上分别设置有完整的主轴穿孔,两分罩体31上分别设置槽型结构,以拼装形成引线排穿孔,在本实施例中,两分罩体31上左右布置,各分罩体31上分别设有完整的引线排穿孔,两分罩体31上分别设置槽型结构,以拼装形成屏蔽罩3上的主轴穿孔,只要两分罩体31在拼装时可夹持固定在主轴支撑骨架32上,以实现与绝缘框架1、灭弧室壳体28的间隔装配即可。
本申请断路器的实施例5:
其与实施例1的不同之处主要在于:实施例1中,主轴支撑骨架32与屏蔽罩3之间形成三处插接定位装配,这样稳定性更好。在本实施例中,可仅设置插接筒结构与屏蔽罩3的主轴穿孔形成的上插接定位装配,省去两处下插接定位装配。
当然,在其他实施例中,在满足装配的情况下,也可以省去上插接定位装配,此时,主要依靠工人手动操作,对工人装配水平要求较高。
本申请还提供了一种气体绝缘开关柜的实施例,该实施例中的气体绝缘开关柜的结构如图7所示,包括气箱400,气箱400中设置有断路器100,断路器100由安装于气箱400外的操动机构101驱动动作,实现分合闸操作,并且,断路器上各灭弧室2的外接引线排通过进线分支排200与相应的进线套管300导电连接,在接线套管作为外接端子与外部线缆导电连接时,将开关柜接入电网中,实现开关柜的正常工作。此处的开关柜具体为环网柜。此处的断路器的结构与上述断路器实施例1中的断路器结构相同,在此不再具体赘述。
在气体绝缘开关柜的其他实施例中,也可采用上述断路器实施例2至5中任一实施例中的断路器结构,在此也不再赘述。
最后需要说明的是,以上所述仅为本申请的优选实施例而已,并不用于限制本申请,尽管参照前述实施例对本申请进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行不需付出创造性劳动的修改,或者对其中部分技术特征进行等同替换。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种断路器,包括:
    绝缘框架;
    灭弧室,安装在所述绝缘框架中,所述灭弧室包括灭弧室壳体和动导电杆,所述动导电杆沿上下方向往复移动的装配在所述灭弧室壳体中,所述动导电杆向上穿出所述灭弧室壳体,所述动导电杆穿出所述灭弧室壳体的部分与外接引线排导电连接;
    主轴支撑骨架,支撑安装于所述绝缘框架上,所述主轴支撑骨架具有主轴支撑孔;
    绝缘主轴,可回转的支撑装配在所述主轴支撑孔中,所述绝缘主轴通过传动机构驱动所述动导电杆沿上下方向往复移动;
    将所述动导电杆露出所述灭弧室壳体的导电部分和所述传动机构定义为所述灭弧室的外露导电部分;
    屏蔽罩,由对接拼装在一起的两个分罩体形成,两个所述分罩体夹持所述主轴支撑骨架以将所述屏蔽罩固定在所述主轴支撑骨架上;所述屏蔽罩与所述灭弧室的外露导电部分导电连接,并罩设于所述灭弧室的外露导电部分外,所述屏蔽罩具有光滑的外表面,用于均匀电场;所述屏蔽罩与所述绝缘框架之间以及所述屏蔽罩与所述灭弧室壳体之间均间隔布置;所述屏蔽罩上设有主轴穿孔,供所述绝缘主轴间隙穿过;所述屏蔽罩上还设有引线排穿孔,供相应的所述灭弧室的外接引线排间隙穿过。
  2. 根据权利要求1所述的断路器,所述主轴支撑骨架上设有插接筒结构,所述插接筒结构的内孔形成所述主轴支撑孔,两个所述分罩体拼装夹持所述主轴支撑骨架时,所述插接筒结构的相应端部定位插装于所述屏蔽罩的主轴穿孔中。
  3. 根据权利要求2所述的断路器,所述插接筒结构与所述屏蔽罩的主 轴穿孔定位插装以形成上插接定位装配,所述主轴支撑骨架和所述屏蔽罩之间还设有两处下插接定位装配,两处所述下插接定位装配和所述上定位插接装配呈品字形布置,每处所述下插接定位装配分别包括定位插接部和适配插接部,所述定位插接部设置于所述主轴支撑骨架上,所述适配插接部设置于所述屏蔽罩上。
  4. 根据权利要求1-3任意一项所述的断路器,所述主轴支撑骨架上设有支撑连接部,所述绝缘框架上设有支撑安装部,所述屏蔽罩上设有支撑穿孔,供所述支撑连接部穿出或供所述支撑安装部间隙穿入,以使所述支撑连接部和所述支撑安装部固定连接,进而使所述主轴支撑骨架支撑安装在所述绝缘框架上。
  5. 根据权利要求4所述的断路器,所述主轴支撑骨架为导电件,所述支撑连接部位于所述屏蔽罩内,所述绝缘框架包括绝缘侧板,所述绝缘侧板朝向所述屏蔽罩的侧面上凸设有绝缘凸块,所述绝缘凸块作为所述支撑安装部插装入所述支撑穿孔中,并与所述支撑穿孔的孔壁留有间隙。
  6. 根据权利要求1-3任意一项所述的断路器,所述主轴支撑骨架为导电件,所述主轴支撑骨架与所述屏蔽罩、相应的所述灭弧室的外露导电部分分别导电连接,以使得所述屏蔽罩通过所述主轴支撑骨架与相应的所述灭弧室的外露导电部分导电连接。
  7. 根据权利要求6所述的断路器,所述主轴支撑骨架上设有导电滑槽,所述导电滑槽与所述动导电杆上设有的导电销滑动导电配合,以使得所述主轴支撑骨架与相应的所述灭弧室的外露导电部分滑动导电连接。
  8. 根据权利要求1-3任意一项所述的断路器,所述主轴穿孔位于所述屏蔽罩的上部,所述屏蔽罩的顶部设有散热通孔。
  9. 根据权利要求1-3任意一项所述的断路器,所述灭弧室沿所述绝缘主轴轴向依次间隔布置有三个,各所述灭弧室的顶端分别罩设有所述屏蔽 罩。
  10. 一种气体绝缘开关柜,包括:
    气箱,用于密封绝缘气体;
    布置于所述气箱中的断路器,所述断路器采用权利要求1至9中任一项所述的断路器。
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