CN111785566A - Dual-power vacuum circuit breaker - Google Patents

Dual-power vacuum circuit breaker Download PDF

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CN111785566A
CN111785566A CN202010732834.7A CN202010732834A CN111785566A CN 111785566 A CN111785566 A CN 111785566A CN 202010732834 A CN202010732834 A CN 202010732834A CN 111785566 A CN111785566 A CN 111785566A
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power supply
operating mechanism
dual
common
switching
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CN111785566B (en
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林存朋
张小武
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Huntsman Hangzhou Power Technology Co ltd
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Huntsman Hangzhou Power Technology Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

本发明涉及一种双电源真空断路器，包括机构架、双电源固封极柱、常用电源操作机构、备用电源操作机构，常用电源操作机构和备用电源操作机构均包括断路器操作模块、分合闸主轴、拐臂、连板、减力连臂，减力连臂的一端设置在连板上，且构成连板与减力连臂的联动配合，减力连臂靠近连板的一端与机构架之间设置有分闸弹簧，双电源固封极柱随减力连臂动作且可实现双电源固封极柱两路电源的接通或断开，常用电源操作机构与备用电源操作机构之间设置有联锁机构，该联锁机构可防止常用电源操作机构和备用电源操作机构同时执行合闸动作。本发明具有结构简单、性能稳定可靠、结构紧凑、高安全性、高分断能力的优点。

Figure 202010732834

The invention relates to a dual power supply vacuum circuit breaker, comprising a mechanism frame, a dual power supply solid-sealed pole, a common power supply operating mechanism, and a backup power supply operating mechanism. The brake main shaft, the turning arm, the connecting plate and the force reducing connecting arm, one end of the force reducing connecting arm is arranged on the connecting plate, and constitutes the linkage between the connecting plate and the force reducing connecting arm. There is an opening spring between the racks, and the dual power supply solid-sealing pole moves with the force-reducing arm and can realize the connection or disconnection of the two-way power supply of the dual power supply solid-sealing pole. The common power supply operating mechanism and the backup power operating mechanism An interlocking mechanism is arranged between the two, which can prevent the common power supply operating mechanism and the standby power operating mechanism from performing the closing action at the same time. The invention has the advantages of simple structure, stable and reliable performance, compact structure, high safety and high breaking capacity.

Figure 202010732834

Description

双电源真空断路器Dual power vacuum circuit breakers

技术领域technical field

本发明涉及一种真空断路器，具体涉及一种双电源真空断路器。The invention relates to a vacuum circuit breaker, in particular to a dual-power vacuum circuit breaker.

背景技术Background technique

随着社会的发展,在电力配电系统中，有许多用户对供电可靠性要求很高，例如煤矿和炼油厂，这些单位一旦发生停电事故，将会给单位带来重大的经济损失甚至造成人员伤亡，所以在这些单位的供电系统中，都需要备有常用电源和备用电源，当常用电源出现停电事故时，备用电源必须立即投入恢复供电，为了实现这个目的，需要通过双电源切换机构在常用电源和备用电源之间进行自动切换。双电源真空断路器要用于中压电力配电系统中，起开、合、承载负荷电流、过载电流、短路电流及自动切换常用、备电源之用。广泛应用于电厂、电网、石化、冶金、地铁、机场、楼宇等。现有的双电源真空断路器包括机构架、设置在机构架上的常用电源操作机构、设置在机构架上的双电源固封极柱、分别设置在机构架上且用于控制双电源固封极柱通断的常用电源操作机构和备用电源操作机构、设置在常用电源操作机构与备用电源操作机构之间联锁机构。现有的双电源真空断路器的联锁机构结构设计复杂，操作繁琐，联锁不可靠，且该双电源真空断路器存在结构复杂、性能不可靠、安全性低的缺陷。With the development of society, in the power distribution system, many users have high requirements on the reliability of power supply, such as coal mines and oil refineries. Once a power failure occurs in these units, it will bring significant economic losses to the unit and even cause personnel Therefore, in the power supply system of these units, it is necessary to have a common power supply and a backup power supply. When a power failure occurs in the common power supply, the backup power supply must be put into operation immediately to restore the power supply. Automatic switching between power and backup power. Dual power vacuum circuit breakers are used in medium-voltage power distribution systems for opening, closing, carrying load current, overload current, short-circuit current and automatic switching of common and backup power sources. Widely used in power plants, power grids, petrochemicals, metallurgy, subways, airports, buildings, etc. The existing dual power supply vacuum circuit breaker includes a mechanism frame, a common power source operating mechanism arranged on the mechanism rack, dual power source solid-sealing poles arranged on the mechanism frame, respectively arranged on the mechanism frame and used to control the dual power source solid-sealing. A common power supply operating mechanism and a standby power operating mechanism for the on-off of the pole, and an interlocking mechanism arranged between the common power operating mechanism and the standby power operating mechanism. The interlocking mechanism of the existing dual power supply vacuum circuit breaker has complex structure design, complicated operation and unreliable interlocking, and the dual power supply vacuum circuit breaker has the defects of complex structure, unreliable performance and low safety.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于克服现有技术的缺陷，提供一种结构简单、性能稳定可靠、结构紧凑、高安全性、高分断能力的双电源真空断路器。The purpose of the present invention is to overcome the defects of the prior art and provide a dual power vacuum circuit breaker with simple structure, stable and reliable performance, compact structure, high safety and high breaking capacity.

为实现上述目的，本发明采用一种双电源真空断路器，包括机构架、至少一个设置在机构架的一侧上且具有两路电源回路的双电源固封极柱、对称设置在机构架上且用于驱动双电源固封极柱通断的常用电源操作机构和备用电源操作机构，所述的常用电源操作机构和备用电源操作机构均包括断路器操作模块、与断路器操作模块联动设置的分合闸主轴、与分合闸主轴联动设置的拐臂、与拐臂联动设置的连板、对应连板处转动设置在机构架上的减力连臂，所述的减力连臂的一端设置在连板上，且构成连板与减力连臂的联动配合，所述的减力连臂靠近连板的一端与机构架之间设置有分闸弹簧，所述的常用电源操作机构、备用电源操作机构的减力连臂分别联动设置在双电源固封极柱的两端上，所述的双电源固封极柱随减力连臂动作且可实现双电源固封极柱两路电源的接通或断开，所述的常用电源操作机构与备用电源操作机构之间设置有联锁机构，该联锁机构可防止常用电源操作机构和备用电源操作机构同时执行合闸动作。In order to achieve the above-mentioned purpose, the present invention adopts a dual power supply vacuum circuit breaker, which includes a mechanism frame, at least one dual power source solid-sealed pole column arranged on one side of the mechanism frame and having two power supply loops, symmetrically arranged on the mechanism frame. And a common power supply operating mechanism and a backup power operating mechanism for driving the dual power supply solid-sealed poles on and off, the common power operating mechanism and the standby power operating mechanism both include a circuit breaker operation module, and a circuit breaker operation module. The opening and closing main shaft, the crank arm arranged in linkage with the opening and closing main shaft, the connecting plate connected with the crank arm, and the force reducing connecting arm which is rotatably arranged on the mechanism frame at the corresponding connecting plate, one end of the said force reducing connecting arm It is arranged on the connecting plate, and constitutes the linkage between the connecting plate and the force-reducing connecting arm. An opening spring is arranged between the end of the force-reducing connecting arm close to the connecting plate and the mechanism frame. The common power supply operating mechanism, The force-reducing connecting arms of the backup power supply operating mechanism are respectively linked and arranged on both ends of the dual-power solid-sealing poles. When the power is turned on or off, an interlocking mechanism is provided between the common power operating mechanism and the standby power operating mechanism, which can prevent the common power operating mechanism and the standby power operating mechanism from performing closing actions at the same time.

上述结构的有益效果是：常用电源操作机构、备用电源操作机构的减力连臂采用杠杆式结构方式驱动双电源固封极柱，可实现常用电源操作机构、备用电源操作机构的操作力的倍力输出，有利于加快合闸速度，且减力连臂上设置有分闸弹簧，在分闸时，分闸弹簧释放能量，分闸速度更快，从而有利于提高该双电源真空断路器的分断能力。且该双电源真空断路器具有结构简单、性能稳定可靠、结构紧凑、高安全性、高分断能力的优点。The beneficial effects of the above structure are: the force-reducing arms of the common power supply operating mechanism and the backup power operating mechanism adopt a lever-type structure to drive the dual power supply solid-sealing poles, which can realize the double power operation force of the common power supply operating mechanism and the standby power operating mechanism. The force output is conducive to speeding up the closing speed, and an opening spring is arranged on the force reducing link. When the opening is opened, the opening spring releases energy, and the opening speed is faster, which is beneficial to improve the double power supply vacuum circuit breaker. breaking capacity. And the double power vacuum circuit breaker has the advantages of simple structure, stable and reliable performance, compact structure, high safety and high breaking capacity.

特别地，所述的联锁机构包括联动设置在常用电源操作机构的分合闸主轴上的备用联锁拐臂、与备用联锁拐臂联动设置的备用闭锁连杆、联动设置在备用电源操作机构的分合闸主轴上的常用联锁拐臂、与常用联锁拐臂联动设置的常用闭锁连杆，所述的备用闭锁连杆的一端设置有与备用电源操作机构的备用合闸掣子联动配合的第一驱动凸块，所述的常用闭锁连杆的一端上设置有与常用电源操作机构的常用合闸掣子联动配合的第二驱动凸块。在常用电源操作机构与备用电源操作机构之间设置有联锁机构，从而可防止常用电源操作机构和备用电源操作机构同时执行合闸动作，有利于提高该双电源真空断路器的安全性能，在操作时，当常用电源操作机构处于合闸状态时，备用闭锁连杆抵触在备用合闸掣子上，此时，备用电源操作机构处于分闸状态，且不能执行合闸动作；只有常用电源操作机构处于分闸状态时，备用闭锁连杆解锁，备用电源操作机构采用执行合闸动作。当备用电源操作机构处于合闸状态时，常用闭锁连杆抵触在常用合闸掣子上，此时，常用电源操作机构处于分闸状态，且不能执行合闸动作。In particular, the interlocking mechanism includes a spare interlocking arm that is linked to the opening and closing main shaft of the common power supply operating mechanism, a spare locking link that is linked to the spare interlocking arm, and that is linked to the standby power supply operation. The common interlocking arm on the opening and closing main shaft of the mechanism, and the common locking link set in linkage with the common interlocking arm, one end of the spare locking link is provided with a spare closing detent with the spare power operating mechanism For the first drive bumps that are linked and matched, one end of the common locking link is provided with a second drive bump that is linked and matched with the common closing catches of the common power supply operating mechanism. An interlocking mechanism is arranged between the operating mechanism of the common power supply and the operating mechanism of the standby power supply, so as to prevent the operating mechanism of the common power supply and the operating mechanism of the standby power supply from performing the closing action at the same time, which is beneficial to improve the safety performance of the dual power supply vacuum circuit breaker. During operation, when the common power supply operating mechanism is in the closing state, the standby locking link is in contact with the standby closing detent. At this time, the standby power operating mechanism is in the opening state and cannot perform the closing action; only the common power supply operation When the mechanism is in the open state, the standby locking link is unlocked, and the standby power operating mechanism adopts the closing action. When the standby power supply operating mechanism is in the closing state, the common blocking link is in contact with the common closing detent. At this time, the common power operating mechanism is in the opening state and cannot perform the closing action.

特别地，所述的减力连臂上对应分闸弹簧的一端处设置有第一弹簧座，所述的机构架上对应分闸弹簧的另一端处设置有第二弹簧座，所述的分闸弹簧的两端分别设置在第一弹簧座、第二弹簧座内。分闸弹簧可增强常用电源操作机构、备用电源操作机构的分闸力，有利于提高该双电源真空断路器的分断能力。In particular, a first spring seat is arranged at one end of the force reducing link corresponding to the opening spring, and a second spring seat is arranged at the other end of the mechanism frame corresponding to the opening spring. Both ends of the brake spring are respectively arranged in the first spring seat and the second spring seat. The opening spring can enhance the opening force of the common power supply operating mechanism and the standby power supply operating mechanism, which is beneficial to improve the breaking capacity of the dual power supply vacuum circuit breaker.

特别地，所述的双电源固封极柱包括设置在机构架上的绝缘柱、与常用电源操作机构的减力连臂联动设置的第一绝缘拉杆、第一导电块、第一真空灭弧室、导电夹、第二真空灭弧室、第二导电块、与备用电源操作机构的减力连臂联动设置的第二绝缘拉杆，所述的第一绝缘拉杆、第一导电块、第一真空灭弧室、导电夹、第二真空灭弧室、第二导电块、第二绝缘拉杆自上而下依次设置在绝缘柱内，所述的第一真空灭弧室内的第一动触头与第一绝缘拉杆联动配合，所述的第二真空灭弧室内的第二动触头与第二绝缘拉杆联动配合，所述的绝缘柱上分别设置有与第一导电块、导电夹、第二导电块电连接的常用电源进线触头、出线触头、备用电源触头。该双电源固封极柱上分别设置有第一真空灭弧室、第二真空灭弧室，常用电源操作机构、备用电源操作机构分别通过绝缘拉杆驱动第一真空灭弧室、第二真空灭弧室，从而可实现控制该双电源固封极柱的两路电源回路的接通或断开。In particular, the dual power supply solid-sealing poles include an insulating column arranged on the mechanism frame, a first insulating pull rod, a first conductive block, and a first vacuum arc extinguishing link arranged in conjunction with the force-reducing arm of a common power supply operating mechanism chamber, a conductive clip, a second vacuum interrupter, a second conductive block, and a second insulating pull rod linked with the force-reducing arm of the backup power operating mechanism, the first insulating pull rod, the first conductive block, the first The vacuum interrupter, the conductive clip, the second vacuum interrupter, the second conductive block, and the second insulating rod are sequentially arranged in the insulating column from top to bottom, and the first movable contact in the first vacuum interrupter The second movable contact in the second vacuum arc extinguishing chamber cooperates with the second insulating pull rod, and the insulating column is respectively provided with the first conductive block, the conductive clip, the Common power input contacts, outlet contacts and spare power contacts for electrical connection of two conductive blocks. The dual power supply solid-sealed poles are respectively provided with a first vacuum interrupter and a second vacuum interrupter, and the common power supply operating mechanism and the backup power operating mechanism drive the first vacuum interrupter and the second vacuum interrupter respectively through insulating rods. The arc chamber can be used to control the connection or disconnection of the two power supply circuits of the dual power supply solid-sealed pole.

附图说明Description of drawings

图1为本发明实施例左视图。FIG. 1 is a left side view of an embodiment of the present invention.

图2为本发明实施例内部结构主视图。FIG. 2 is a front view of the internal structure of the embodiment of the present invention.

图3为本发明实施例内部结构右视图。FIG. 3 is a right side view of the internal structure of the embodiment of the present invention.

具体实施方式Detailed ways

如图1～3所示，本发明实施例是一种双电源真空断路器，包括机构架10、至少一个设置在机构架10的一侧上且具有两路电源回路的双电源固封极柱11、对称设置在机构架10上且用于驱动双电源固封极柱11通断的常用电源操作机构20和备用电源操作机构21，所述的常用电源操作机构20和备用电源操作机构21均包括断路器操作模块200、与断路器操作模块200联动设置的分合闸主轴201、与分合闸主轴201联动设置的拐臂202、与拐臂202联动设置的连板203、对应连板203处转动设置在机构架10上的减力连臂204，所述的减力连臂204的一端设置在连板203上，且构成连板203与减力连臂204的联动配合，所述的减力连臂204靠近连板203的一端与机构架10之间设置有分闸弹簧205，所述的常用电源操作机构20、备用电源操作机构21的减力连臂204分别联动设置在双电源固封极柱11的两端上，所述的双电源固封极柱11随减力连臂204动作且可实现双电源固封极柱11两路电源的接通或断开，所述的常用电源操作机构20与备用电源操作机构21之间设置有联锁机构30，该联锁机构30可防止常用电源操作机构20和备用电源操作机构21同时执行合闸动作。所述的双电源固封极柱11的数量为3个，且三个双电源固封极柱11并排间隔设置在机构架10的一侧上。As shown in FIGS. 1 to 3 , an embodiment of the present invention is a dual-power vacuum circuit breaker, which includes a mechanism frame 10 and at least one dual-power solid-sealed pole disposed on one side of the mechanism frame 10 and having two power circuits. 11. The common power supply operating mechanism 20 and the standby power operating mechanism 21 are symmetrically arranged on the mechanism frame 10 and used to drive the dual power supply solid-sealed pole 11 to be turned on and off. The common power supply operating mechanism 20 and the standby power operating mechanism 21 are both. It includes a circuit breaker operation module 200, an opening and closing main shaft 201 arranged in linkage with the circuit breaker operation module 200, an arm 202 arranged in linkage with the opening and closing main shaft 201, a connecting plate 203 arranged in linkage with the arm 202, and a corresponding connecting plate 203 The force-reducing connecting arm 204 arranged on the mechanism frame 10 is rotated at the same time, and one end of the force-reducing connecting arm 204 is arranged on the connecting plate 203, and constitutes the linkage between the connecting plate 203 and the force-reducing connecting arm 204. An opening spring 205 is provided between the end of the force reducing link 204 close to the connecting plate 203 and the mechanism frame 10. The force reducing link 204 of the common power supply operating mechanism 20 and the backup power operating mechanism 21 are respectively linked and arranged in the dual power supply. On both ends of the solid-sealing pole 11, the dual-power solid-sealing pole 11 moves with the force reducing link 204 and can realize the connection or disconnection of the two-way power supply of the dual-power solid-sealing pole 11. An interlocking mechanism 30 is provided between the normal power operating mechanism 20 and the backup power operating mechanism 21 , and the interlocking mechanism 30 can prevent the normal power operating mechanism 20 and the backup power operating mechanism 21 from performing the closing action at the same time. The number of the dual-power-supply solid-sealing poles 11 is three, and the three dual-power-supply solid-sealing poles 11 are arranged side by side and at intervals on one side of the mechanism frame 10 .

如图3所示，所述的联锁机构30包括联动设置在常用电源操作机构20的分合闸主轴201上的备用联锁拐臂31、与备用联锁拐臂31联动设置的备用闭锁连杆32、联动设置在备用电源操作机构21的分合闸主轴201上的常用联锁拐臂33、与常用联锁拐臂33联动设置的常用闭锁连杆34，所述的备用闭锁连杆32的一端设置有与备用电源操作机构21的备用合闸掣子211联动配合的第一驱动凸块321，所述的常用闭锁连杆34的一端上设置有与常用电源操作机构20的常用合闸掣子206联动配合的第二驱动凸块341。在常用电源操作机构与备用电源操作机构之间设置有联锁机构，从而可防止常用电源操作机构和备用电源操作机构同时执行合闸动作，有利于提高该双电源真空断路器的安全性能，在操作时，当常用电源操作机构处于合闸状态时，备用闭锁连杆抵触在备用合闸掣子上，此时，备用电源操作机构处于分闸状态，且不能执行合闸动作；只有常用电源操作机构处于分闸状态时，备用闭锁连杆解锁，备用电源操作机构采用执行合闸动作。当备用电源操作机构处于合闸状态时，常用闭锁连杆抵触在常用合闸掣子上，此时，常用电源操作机构处于分闸状态，且不能执行合闸动作。所述的减力连臂204上对应分闸弹簧205的一端处设置有第一弹簧座207，所述的机构架10上对应分闸弹簧204的另一端处设置有第二弹簧座208，所述的分闸弹簧204的两端分别设置在第一弹簧座207、第二弹簧座208内。分闸弹簧可增强常用电源操作机构、备用电源操作机构的分闸力，有利于提高该双电源真空断路器的分断能力。所述的双电源固封极柱11包括设置在机构架10上的绝缘柱111、与常用电源操作机构20的减力连臂204联动设置的第一绝缘拉杆112、第一导电块113、第一真空灭弧室114、导电夹115、第二真空灭弧室116、第二导电块117、与备用电源操作机构21的减力连臂204联动设置的第二绝缘拉杆118，所述的第一绝缘拉杆112、第一导电块113、第一真空灭弧室114、导电夹115、第二真空灭弧室116、第二导电块117、第二绝缘拉杆118自上而下依次设置在绝缘柱111内，所述的第一真空灭弧室114内的第一动触头与第一绝缘拉杆111联动配合，所述的第二真空灭弧室116内的第二动触头与第二绝缘拉杆118联动配合，所述的绝缘柱111上分别设置有与第一导电块113、导电夹115、第二导电块117电连接的常用电源进线触头12、出线触头13、备用电源触头14。该双电源固封极柱上分别设置有第一真空灭弧室、第二真空灭弧室，常用电源操作机构、备用电源操作机构分别通过绝缘拉杆驱动第一真空灭弧室、第二真空灭弧室，从而可实现控制该双电源固封极柱的两路电源回路的接通或断开。As shown in FIG. 3 , the interlocking mechanism 30 includes a spare interlocking arm 31 that is linked to the opening and closing main shaft 201 of the common power supply operating mechanism 20 , and a spare locking arm 31 that is linked to the spare interlocking arm 31 . The lever 32, the common interlocking arm 33 arranged in linkage on the opening and closing main shaft 201 of the standby power supply operating mechanism 21, and the common locking link 34 arranged in linkage with the common interlocking arm 33, the spare locking link 32 One end is provided with a first drive bump 321 that is linked with the standby closing detent 211 of the standby power operating mechanism 21, and one end of the common locking link 34 is provided with a common closing with the common power operating mechanism 20. The pawl 206 is linked with the second driving bump 341 . An interlocking mechanism is arranged between the operating mechanism of the common power supply and the operating mechanism of the standby power supply, so as to prevent the operating mechanism of the common power supply and the operating mechanism of the standby power supply from performing the closing action at the same time, which is beneficial to improve the safety performance of the dual power supply vacuum circuit breaker. During operation, when the common power supply operating mechanism is in the closing state, the standby locking link is in contact with the standby closing detent. At this time, the standby power operating mechanism is in the opening state and cannot perform the closing action; only the common power supply operation When the mechanism is in the open state, the standby locking link is unlocked, and the standby power operating mechanism adopts the closing action. When the standby power supply operating mechanism is in the closing state, the common blocking link is in contact with the common closing detent. At this time, the common power operating mechanism is in the opening state and cannot perform the closing action. A first spring seat 207 is arranged at one end of the force reducing link 204 corresponding to the opening spring 205, and a second spring seat 208 is arranged at the other end of the mechanism frame 10 corresponding to the opening spring 204. The two ends of the opening spring 204 are respectively arranged in the first spring seat 207 and the second spring seat 208 . The opening spring can enhance the opening force of the common power supply operating mechanism and the standby power supply operating mechanism, which is beneficial to improve the breaking capacity of the dual power supply vacuum circuit breaker. The dual-power solid-sealing pole 11 includes an insulating column 111 arranged on the mechanism frame 10 , a first insulating rod 112 , a first conductive block 113 , a first insulating rod 112 linked with the force-reducing link 204 of the common power supply operating mechanism 20 . A vacuum interrupter 114 , a conductive clip 115 , a second vacuum interrupter 116 , a second conductive block 117 , and a second insulating rod 118 linked with the force-reducing link 204 of the backup power operating mechanism 21 . An insulating tie rod 112, a first conductive block 113, a first vacuum interrupter 114, a conductive clip 115, a second vacuum interrupter 116, a second conductive block 117, and a second insulating tie rod 118 are arranged in sequence from top to bottom on the insulation In the column 111, the first movable contact in the first vacuum interrupter 114 is linked with the first insulating rod 111, and the second movable contact in the second vacuum interrupter 116 and the second The insulating rods 118 are linked together, and the insulating posts 111 are respectively provided with a common power supply incoming line contact 12, an outgoing line contact 13, and a backup power supply that are electrically connected to the first conductive block 113, the conductive clip 115, and the second conductive block 117. Contact 14. The dual power supply solid-sealed poles are respectively provided with a first vacuum interrupter and a second vacuum interrupter, and the common power supply operating mechanism and the backup power operating mechanism drive the first vacuum interrupter and the second vacuum interrupter respectively through insulating rods. The arc chamber can be used to control the connection or disconnection of the two power supply circuits of the dual power supply solid-sealed pole.

常用电源操作机构、备用电源操作机构的减力连臂采用杠杆式结构方式驱动双电源固封极柱，可实现常用电源操作机构、备用电源操作机构的操作力的倍力输出，有利于加快合闸速度，且减力连臂上设置有分闸弹簧，在分闸时，分闸弹簧释放能量，分闸速度更快，从而有利于提高该双电源真空断路器的分断能力。且该双电源真空断路器具有结构简单、性能稳定可靠、结构紧凑、高安全性、高分断能力的优点。The force-reducing arm of the common power supply operating mechanism and the backup power operating mechanism adopts a lever-type structure to drive the dual power supply solid-sealing poles, which can realize the double force output of the operating force of the common power supply operating mechanism and the standby power supply operating mechanism, which is conducive to speeding up the integration When the brake is opened, the opening spring releases energy, and the opening speed is faster, which is beneficial to improve the breaking capacity of the dual-power vacuum circuit breaker. And the double power vacuum circuit breaker has the advantages of simple structure, stable and reliable performance, compact structure, high safety and high breaking capacity.

Claims (4)

1. The utility model provides a dual supply vacuum circuit breaker, includes that framework, at least one set up on one side of framework and have two way power supply loop's dual supply seals utmost point post admittedly, symmetry set up on the framework and be used for driving dual supply and seal power operating device and stand-by power supply operating device commonly used of utmost point post break-make admittedly, its characterized in that: the common power supply operating mechanism and the standby power supply operating mechanism respectively comprise a circuit breaker operating module, a switching-on and switching-off main shaft, a connecting lever, a connecting plate and a force-reducing connecting arm, wherein the switching-on and switching-off main shaft is arranged in a linkage manner with the circuit breaker operating module, the connecting plate is arranged in a linkage manner with the switching-on and switching-off main shaft, the connecting plate is arranged in a linkage manner with the connecting lever, the force-reducing connecting arm is arranged on a framework in a rotating manner corresponding to the connecting plate, one end of the force-reducing connecting arm is arranged on the connecting plate and forms linkage fit with the force-reducing connecting arm, a switching-off spring is arranged between one end of the force-reducing connecting arm close to the connecting plate and a mechanism frame, the force-reducing connecting arms of the common power supply operating mechanism and the standby power supply operating mechanism are respectively arranged on two ends of a dual-power supply solid-sealed pole in a linkage manner, the dual-supply solid-, the interlock mechanism prevents the common power supply operating mechanism and the standby power supply operating mechanism from simultaneously performing a closing operation.
2. The dual-power-supply vacuum circuit breaker according to claim 1, characterized in that: the interlocking mechanism comprises a standby interlocking crank arm which is arranged on a switching-on and switching-off main shaft of the common power supply operating mechanism in a linkage manner, a standby locking connecting rod which is arranged in a linkage manner with the standby interlocking crank arm, a common interlocking crank arm which is arranged on the switching-on and switching-off main shaft of the standby power supply operating mechanism in a linkage manner, and a common locking connecting rod which is arranged in a linkage manner with the common interlocking crank arm, wherein a first driving lug which is in linkage fit with a standby switching-on pawl of the standby power supply operating mechanism is arranged at one end of the standby locking connecting rod, and a second driving lug which is in linkage fit with the common switching-on pawl of the common power supply operating mechanism.
3. The dual-power-supply vacuum circuit breaker according to claim 1 or 2, characterized in that: the power-reducing connecting arm is provided with a first spring seat at one end corresponding to the opening spring, the mechanism frame is provided with a second spring seat at the other end corresponding to the opening spring, and two ends of the opening spring are respectively arranged in the first spring seat and the second spring seat.
4. The dual-power-supply vacuum circuit breaker according to claim 1 or 2, characterized in that: the dual-power solid-sealed polar pole comprises an insulating column arranged on a framework, a first insulating pull rod, a first conductive block, a first vacuum arc extinguish chamber, a conductive clamp, a second vacuum arc extinguish chamber, a second conductive block and a second insulating pull rod, wherein the first insulating pull rod, the first conductive block, the first vacuum arc extinguish chamber, the conductive clamp, the second vacuum arc extinguish chamber, the second conductive block and the second insulating pull rod are arranged in the insulating column in a linkage manner through the force reducing connecting arm of a common power operating mechanism, the first insulating pull rod, the first conductive block, the first vacuum arc extinguish chamber, the conductive clamp, the second vacuum arc extinguish chamber, the second conductive block and the second insulating pull rod are sequentially arranged in the insulating column from top to bottom, a first moving contact in the first vacuum arc extinguish chamber is in linkage fit with the first insulating pull rod, a second moving contact in the second vacuum arc extinguish chamber is in linkage fit with the second insulating pull rod, and a common power incoming contact electrically connected with the first conductive block, the, Outlet contacts and standby power supply contacts.
CN202010732834.7A 2020-07-27 2020-07-27 Dual power vacuum circuit breaker Active CN111785566B (en)

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