CN104637726B - Environment-friendly type list voltage breaker arc-chutes - Google Patents
Environment-friendly type list voltage breaker arc-chutes Download PDFInfo
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- CN104637726B CN104637726B CN201510092157.6A CN201510092157A CN104637726B CN 104637726 B CN104637726 B CN 104637726B CN 201510092157 A CN201510092157 A CN 201510092157A CN 104637726 B CN104637726 B CN 104637726B
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- arc extinguishing
- extinguishing chamber
- chamber
- arc
- circuit breaker
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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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
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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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
- H01H2033/912—Liquified gases, e.g. liquified SF6
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- Circuit Breakers (AREA)
Abstract
本发明涉及一种环保型单压断路器灭弧室，本环保型单压断路器灭弧室包括有圆筒型壳体；在所述灭弧室的顶端固定安装有静触点，在所述灭弧室的底端滑动套设有动触点；筒壁内呈中空状态的所述壳体分为灭弧腔和增压腔；所述灭弧腔和所述增压腔之间通过弹性膜阻隔；所述灭弧腔的内侧壁由绝缘隔热板做成，在所述灭弧腔的内侧壁上等距开设有喷射孔，各所述喷射孔上密封有封膜，在所述灭弧腔内填充有SF6气体；所述增压腔的内侧壁由导热金属板做成，在所述增压腔内填充有沸点低的物质；该灭弧室组成的单压断路器结构简单、体积小；气体压力足，能够高效断路、灭弧，同时能够将有毒气体回收。
The invention relates to an arc extinguishing chamber of an environment-friendly single-voltage circuit breaker. The arc-extinguishing chamber of the environment-friendly single-voltage circuit breaker includes a cylindrical shell; a static contact is fixedly installed on the top of the arc-extinguishing chamber. The bottom sliding sleeve of the arc extinguishing chamber is provided with a movable contact; the shell in the hollow state in the cylinder wall is divided into an arc extinguishing chamber and a pressurized chamber; the arc extinguishing chamber and the pressurized chamber are passed through The inner wall of the arc extinguishing chamber is made of an insulating heat shield, and spray holes are equally spaced on the inner wall of the arc extinguishing chamber, and each spray hole is sealed with a sealing film. The arc extinguishing chamber is filled with SF 6 gas; the inner wall of the pressurized chamber is made of a heat-conducting metal plate, and the pressurized chamber is filled with a substance with a low boiling point; the single-voltage circuit breaker composed of the arc extinguishing chamber The structure is simple and the volume is small; the gas pressure is sufficient, which can effectively break the circuit and extinguish the arc, and can recover the toxic gas at the same time.
Description
技术领域technical field
本发明涉及一种单压断路器组件，特别的，是一种环保型单压断路器灭弧室。The invention relates to a single-voltage circuit breaker assembly, in particular to an environment-friendly single-voltage circuit breaker arc extinguishing chamber.
背景技术Background technique
SF6作为一种绝缘气体，具有很多优点，他是一种无色、无臭、无毒、不可燃的惰性气体，化学性能稳定并具有优良的冷却性能。SF6气体在电弧高温作用下发生化学反应并吸收热量，SF6气体在高温作用下捕获电子，使电弧电压和电弧的作用时间常数降低，因此SF6气体的绝缘强度很快上升，使开断的端口绝缘在很短的时间内恢复到较高的绝缘强度，有着较好的恢复特性。As an insulating gas, SF 6 has many advantages. It is a colorless, odorless, non-toxic, non-flammable inert gas with stable chemical properties and excellent cooling performance. SF 6 gas undergoes a chemical reaction and absorbs heat under the high temperature of the arc, and the SF 6 gas captures electrons under the action of high temperature, which reduces the arc voltage and the time constant of the arc, so the dielectric strength of the SF 6 gas increases quickly, making the breaking The terminal insulation recovers to a higher dielectric strength in a short period of time, and has better recovery characteristics.
使用SF6气体做成的断路器主要由三种结构，双压断路器、单压断路器和磁旋式断路器，双压断路器分为高压区和低压区，该结构较为复杂，同时SF6气体在较高压时容易凝露，因此双压断路器以逐渐被取代；磁旋式断路器利用磁场洛伦兹力的作用，使电弧高速旋转进而使电弧熄灭；单压断路器使用较为广泛，它只有一个气压系统，通过活塞气缸的相对运动进行气体喷射，进而实现灭弧；目前的单压断路器因其活塞系统的存在，结构较为复杂；同时，随着动触头的下滑，电弧变长，喷出气体需要的气压也需要相应增大，在现有技术上实现起来较为繁琐；此外断路器反应后生成有毒物质，回收较为麻烦。Circuit breakers made of SF 6 gas are mainly composed of three structures, dual-voltage circuit breakers, single-voltage circuit breakers and magnetic rotary circuit breakers. Dual-voltage circuit breakers are divided into high-voltage and low-voltage areas. 6 Gas is easy to condense at higher pressure, so the double-voltage circuit breaker is gradually replaced; the magnetic rotary circuit breaker uses the Lorentz force of the magnetic field to make the arc rotate at a high speed and then extinguish the arc; the single-voltage circuit breaker is more widely used , it has only one air pressure system, which injects gas through the relative movement of the piston and cylinder, and then realizes arc extinguishing; the current single-pressure circuit breaker has a relatively complicated structure due to the existence of the piston system; at the same time, as the moving contact slides down, the arc If the length becomes longer, the air pressure required to eject the gas also needs to be increased accordingly, which is relatively cumbersome to implement in the prior art; in addition, the circuit breaker generates toxic substances after the reaction, and the recovery is more troublesome.
发明内容Contents of the invention
针对上述问题，本发明提供一种环保型单压断路器灭弧室，该灭弧室组成的单压断路器结构简单、体积小；气体压力足，能够高效断路、灭弧，同时能够将有毒气体回收。In view of the above problems, the present invention provides an environment-friendly single-voltage circuit breaker arc extinguishing chamber. The single-voltage circuit breaker composed of the arc extinguishing chamber is simple in structure and small in size; the gas pressure is sufficient, it can efficiently break the circuit and extinguish the arc, and at the same time it can remove toxic Gas recovery.
为解决上述问题，本发明所采用的技术方案是：本环保型单压断路器灭弧室包括有圆筒型壳体；在所述灭弧室的顶端固定安装有静触点，在所述灭弧室的底端滑动套设有动触点；所述静触点和所述动触点位置正对的排布在所述壳体的轴线上；筒壁内呈中空状态的所述壳体分为灭弧腔和增压腔；所述灭弧腔和所述增压腔之间通过弹性膜阻隔；所述灭弧腔的内侧壁由绝缘隔热板做成，在所述灭弧腔的内侧壁上等距开设有喷射孔，各所述喷射孔上密封有封膜，在所述灭弧腔内填充有SF6气体；所述增压腔的内侧壁由导热金属板做成，在所述增压腔内填充有沸点低的物质。In order to solve the above problems, the technical solution adopted in the present invention is: the arc extinguishing chamber of the environment-friendly single-voltage circuit breaker includes a cylindrical shell; a static contact is fixedly installed on the top of the arc extinguishing chamber, and The sliding sleeve at the bottom of the arc extinguishing chamber is provided with a movable contact; the static contact and the movable contact are arranged on the axis of the housing in direct opposition; the hollow shell inside the cylinder wall The body is divided into an arc extinguishing chamber and a pressurized chamber; the arc extinguishing chamber and the pressurized chamber are separated by an elastic film; the inner wall of the arc extinguishing chamber is made of an insulating heat shield, and the arc extinguishing chamber The inner wall of the chamber is equidistantly provided with injection holes, each of which is sealed with a sealing film, and the arc extinguishing chamber is filled with SF 6 gas; the inner wall of the pressurized chamber is made of a heat-conducting metal plate , the pressurized chamber is filled with substances with low boiling points.
本发明的有益效果是：当电路处于正常工作状态时，动触点和静触点保持接通状态；SF6气体由封膜密封在灭弧腔内；增压腔内的物质保持固态或液态；当电路出现短路等异常情况时，动触点向下运动与静触点分开，电路断开；在动触点与静触点断开过程中产生电弧，电弧产生的热量通过导热金属板快速传递到增压腔内，增压腔内的物质受热蒸发、汽化并瞬间提升增压腔内的压强；电弧在产生的同时，将所述封膜击穿、融化；瞬间增大的压强促使弹性膜发生弹性形变并将灭弧腔的体积压缩，灭弧腔内的压强随之增大；灭弧腔内的高压使封膜再次破裂，同时灭弧腔内的气体从喷射孔喷出，SF6气体在放电环境下发生化学反应，进而将电弧熄灭；在电弧熄灭后，整个灭弧室内的温度降低，所述增压腔内汽化的物质冷却并变回液态或固态，此时弹性膜恢复弹性形变；所述灭弧腔的体积变大，压强减小，此时灭弧室内通过电击反应的生成物被回收并吸回灭弧腔内，此时整个灭弧室呈低压状态；当电力工人将断路器回收拆解时，成低压的灭弧室不会向外喷射有毒气体，而是将外界空气吸入，有效防止有毒气体外泄。The beneficial effects of the present invention are: when the circuit is in normal working state, the movable contact and the static contact remain connected; SF 6 gas is sealed in the arc extinguishing chamber by the sealing film; the substance in the pressurized chamber remains solid or liquid ;When there is an abnormal situation such as a short circuit in the circuit, the moving contact moves downward to separate from the static contact, and the circuit is disconnected; an arc is generated during the disconnection process between the moving contact and the static contact, and the heat generated by the arc passes through the heat-conducting metal plate quickly Transferred to the pressurized chamber, the material in the pressurized chamber is heated and vaporized, and the pressure in the pressurized chamber is instantly increased; while the arc is generated, the sealing film is broken down and melted; the instantaneously increased pressure promotes elasticity The film elastically deforms and compresses the volume of the arc extinguishing chamber, and the pressure in the arc extinguishing chamber increases accordingly; the high pressure in the arc extinguishing chamber causes the sealing film to rupture again, and at the same time, the gas in the arc extinguishing chamber is ejected from the injection hole, and the SF 6. The gas reacts chemically in the discharge environment, and then extinguishes the arc; after the arc is extinguished, the temperature in the entire arc extinguishing chamber decreases, and the vaporized substance in the pressurized chamber cools and turns back to a liquid or solid state, and the elastic film recovers at this time Elastic deformation; the volume of the arc extinguishing chamber becomes larger and the pressure decreases. At this time, the product of the electric shock reaction in the arc extinguishing chamber is recovered and sucked back into the arc extinguishing chamber. At this time, the entire arc extinguishing chamber is in a low-voltage state; when the power When workers recycle and disassemble the circuit breaker, the low-pressure interrupter will not emit toxic gas, but will inhale the outside air, effectively preventing the leakage of toxic gas.
本发明结构简单，省去了原有打压断路器中的活塞机构；同时本发明的体积小巧，有效减小断路器占用的空间；由于SF6气体在发生反应后产生有害物质，本发明能够有效将有害气体回收并限制在灭弧腔内，同时保证整个灭弧室呈低压状态，进一步防止有害气体外泄。The structure of the present invention is simple, and the piston mechanism in the original pressure circuit breaker is omitted; at the same time, the volume of the present invention is small and exquisite, which effectively reduces the space occupied by the circuit breaker; since the SF 6 gas produces harmful substances after the reaction, the present invention can effectively Harmful gas is recovered and confined in the arc extinguishing chamber, while ensuring that the entire arc extinguishing chamber is in a low-pressure state, further preventing the leakage of harmful gas.
作为优选，在所述动触点上套设有限位环；以便于在断路器工作时限制动触点向下滑动的距离，同时保证动触点堵住灭弧室的底端，使灭弧室形成近密封状态。As a preference, a limit ring is sleeved on the movable contact; in order to limit the distance that the movable contact slides downward when the circuit breaker is working, and at the same time ensure that the movable contact blocks the bottom end of the arc extinguishing chamber, so that the arc extinguishing The chamber forms a near-sealed state.
作为优选，增压腔内的物质可以为纯水、乙醇、固态碘中的一种；这些物质受热快速气化，实现快速增压。Preferably, the substance in the pressurization chamber can be one of pure water, ethanol, and solid iodine; these substances are quickly vaporized by heating to realize rapid pressurization.
作为优选，所述导热金属板由两块对称的金属板组成，在所述导热金属板上盘绕有加热金属丝，所述加热金属丝呈S型且加热金属丝的两端分别电性连接在两块导热金属板上；当电路断开时，电弧从动触头转移到导热金属板上，并导通加热金属丝，加热金属丝通电加热，进一步加速增压腔内物质的汽化，进而提高增压速度。Preferably, the heat-conducting metal plate is composed of two symmetrical metal plates, and a heating wire is coiled on the heat-conducting metal plate, and the heating wire is S-shaped, and the two ends of the heating wire are electrically connected to Two heat-conducting metal plates; when the circuit is disconnected, the arc is transferred from the movable contact to the heat-conducting metal plate, and the heating wire is turned on, and the heating wire is energized to heat, further accelerating the vaporization of the substances in the booster chamber, thereby improving boost speed.
作为优选，各所述喷射孔分成两组，每组喷射孔在灭弧腔内侧壁上开设的位置分别正对静触点和动触点的端部；以便于快速将电弧熄灭。Preferably, the injection holes are divided into two groups, and the positions of each group of injection holes on the inner wall of the arc extinguishing chamber are respectively facing the ends of the static contact and the movable contact; so as to quickly extinguish the arc.
附图说明Description of drawings
图1为本环保型单压断路器灭弧室一个实施例的截面示意图。Fig. 1 is a schematic cross-sectional view of an embodiment of the arc extinguishing chamber of the environment-friendly single-voltage circuit breaker.
图2为图1所示实施例的俯视图。Fig. 2 is a top view of the embodiment shown in Fig. 1 .
图3为图1所示实施例中加热金属丝的结构示意图。Fig. 3 is a schematic structural view of the heating wire in the embodiment shown in Fig. 1 .
具体实施方式detailed description
实施例Example
在图1至图3所示的实施例中，本环保型单压断路器灭弧室包括有圆筒型壳体；在所述灭弧室的顶端固定安装有静触点1，在所述灭弧室的底端滑动套设有动触点2，在所述动触点2上套设有限位环21；所述静触点1和所述动触点2位置正对的排布在所述壳体的轴线上；筒壁内呈中空状态的所述壳体分为灭弧腔3和增压腔4；所述灭弧腔3和所述增压腔4之间通过弹性膜5阻隔；所述灭弧腔3的内侧壁由绝缘隔热板做成，在所述灭弧腔3的内侧壁上等距开设有喷射孔32，各所述喷射孔32分成两组，每组喷射孔32在灭弧腔3内侧壁上开设的位置分别正对静触点1和动触点2的端部；即两组喷射孔32分别以静触点1和动触点2的端部为圆心，在灭弧腔3内侧壁上等距均布；各所述喷射孔32上密封有封膜，在所述灭弧腔3内填充有SF6气体31，此时SF6气体31被密封在灭弧腔3内；所述增压腔4的内侧壁由导热金属板41做成，所述导热金属板41由两块对称的金属板组成，在所述导热金属板41上盘绕有加热金属丝411，所述加热金属丝411呈S型且加热金属丝411的两端分别电性连接在两块导热金属板41上；在密闭的所述增压腔4内填充的物质可以为纯水、乙醇、固态碘等低沸点物质，这些物质无毒稳定，在温度较高时能够快速汽化，进而快速提高增压腔4内的压强。In the embodiment shown in Figures 1 to 3, the arc extinguishing chamber of the environment-friendly single-voltage circuit breaker includes a cylindrical shell; a static contact 1 is fixedly installed on the top of the arc extinguishing chamber, and The bottom sliding sleeve of the arc extinguishing chamber is provided with a moving contact 2, and a limit ring 21 is set on the moving contact 2; the static contact 1 and the moving contact 2 are arranged in the On the axis of the housing; the housing in a hollow state in the cylinder wall is divided into an arc extinguishing chamber 3 and a pressurization chamber 4; an elastic membrane 5 passes between the arc extinguishing chamber 3 and the pressurization chamber 4 barrier; the inner side wall of the arc extinguishing chamber 3 is made of an insulating heat shield, and spray holes 32 are equidistantly opened on the inner side wall of the arc extinguishing chamber 3, and each of the spray holes 32 is divided into two groups, and each group The positions of the injection holes 32 on the inner wall of the arc extinguishing chamber 3 are respectively facing the ends of the static contact 1 and the movable contact 2; is the center of the circle, and is equally spaced and uniformly distributed on the inner wall of the arc extinguishing chamber 3; a sealing film is sealed on each of the injection holes 32, and the arc extinguishing chamber 3 is filled with SF6 gas 31, and at this time, the SF6 gas 31 is sealed in the In the arc extinguishing chamber 3; the inner side wall of the pressurized chamber 4 is made of a heat conducting metal plate 41, the heat conducting metal plate 41 is composed of two symmetrical metal plates, and a heating metal coil is coiled on the heat conducting metal plate 41 wire 411, the heating wire 411 is S-shaped and the two ends of the heating wire 411 are electrically connected to two heat-conducting metal plates 41 respectively; the substance filled in the airtight pressurized chamber 4 can be pure water , ethanol, solid iodine and other low-boiling substances, these substances are non-toxic and stable, and can quickly vaporize when the temperature is high, and then rapidly increase the pressure in the booster chamber 4.
当电路处于正常工作状态时，动触点2和静触点1保持接通状态；SF6气体31由封膜密封在灭弧腔3内；增压腔4内的物质保持固态或液态；当电路出现短路等异常情况时，动触点2向下运动与静触点1分开，电路断开；在动触点2与静触点1断开过程中会产生电弧，电弧产生的热量能够烧穿封膜，同时电弧产生的热量通过导热金属板41快速传递到增压腔4内，增压腔4内的物质受热蒸发、汽化并瞬间提升增压腔4内的压强；瞬间增大的压强促使弹性膜5发生弹性形变并将灭弧腔3的体积压缩，灭弧腔3内的压强随之增大；灭弧腔3内的高压使封膜再次破裂，同时灭弧腔3内的气体从喷射孔32喷出，SF6气体31在放电环境下发生化学反应，SF6气体31将捕获电子，同时使动、静触点1冷却，进而使电弧电压和电弧的作用时间常数降低；SF6气体31的绝缘强度很快上升，使开断的端口绝缘在很短的时间内恢复到较高的绝缘强度，使得本单压断路器有着较好的恢复特性；通过SF6气体31的喷射，电弧快速熄灭；在电弧熄灭后，整个灭弧室内的温度降低，所述增压腔4内汽化的物质冷却并变回液态或固态，此时弹性膜5恢复弹性形变；所述灭弧腔3的体积变大，压强减小，此时灭弧室内通过电击反应的生成物被回收并吸回灭弧腔3内，此时整个灭弧室呈低压状态；当电力工人将断路器回收拆解时，成低压的灭弧室不会向外喷射有毒气体，而是将外界空气吸入，有效防止有毒气体外泄。When the circuit is in normal working condition, the movable contact 2 and the static contact 1 remain connected; the SF6 gas 31 is sealed in the arc extinguishing chamber 3 by the sealing film; the substance in the booster chamber 4 remains solid or liquid; when the circuit When abnormal conditions such as short circuit occur, the moving contact 2 moves downward to separate from the static contact 1, and the circuit is disconnected; an arc will be generated during the disconnection process between the moving contact 2 and the static contact 1, and the heat generated by the arc can burn through Seal the film, and at the same time, the heat generated by the arc is quickly transferred to the pressurized chamber 4 through the heat-conducting metal plate 41, and the material in the pressurized chamber 4 is evaporated and vaporized by heat, and the pressure in the pressurized chamber 4 is instantly increased; the instantaneously increased pressure promotes The elastic membrane 5 undergoes elastic deformation and compresses the volume of the arc extinguishing chamber 3, and the pressure in the arc extinguishing chamber 3 increases accordingly; the high pressure in the arc extinguishing chamber 3 causes the sealing film to rupture again, and the gas in the arc extinguishing chamber 3 The injection hole 32 sprays out, and the SF6 gas 31 undergoes a chemical reaction in the discharge environment, and the SF6 gas 31 will capture electrons, and at the same time cool the dynamic and static contacts 1, thereby reducing the arc voltage and the action time constant of the arc; the SF6 gas 31 The insulation strength rises quickly, so that the disconnected port insulation recovers to a higher insulation strength in a short period of time, so that the single-voltage circuit breaker has better recovery characteristics; through the injection of SF6 gas 31, the arc is quickly extinguished; After the arc is extinguished, the temperature in the entire arc extinguishing chamber decreases, and the vaporized substance in the pressurized chamber 4 cools and turns back to a liquid or solid state, and at this time, the elastic film 5 resumes elastic deformation; the volume of the arc extinguishing chamber 3 becomes larger , the pressure decreases. At this time, the product of the electric shock reaction in the arc extinguishing chamber is recovered and sucked back into the arc extinguishing chamber 3. At this time, the entire arc extinguishing chamber is in a low-pressure state; The unique arc extinguishing chamber will not spray out toxic gas, but will inhale the outside air to effectively prevent the leakage of toxic gas.
当动触点2向下滑动时，限位环21将动触点2卡设在灭弧室的底端，此时灭弧室内形成封闭空间；在动触点2向下移动的过程中，电弧从动触点2转移到导热金属板41上，使得电路快速断开；由于电弧的充电，导热金属板41上的加热金属丝411导通并对增压腔4再次加热，使得气压急速增大，进一步提高本单压断路器的灭弧速度。When the movable contact 2 slides downward, the limit ring 21 clamps the movable contact 2 at the bottom of the arc extinguishing chamber, and at this time an enclosed space is formed in the arc extinguishing chamber; during the downward movement of the movable contact 2, The arc is transferred from the movable contact 2 to the heat-conducting metal plate 41, so that the circuit is quickly disconnected; due to the charging of the arc, the heating wire 411 on the heat-conducting metal plate 41 conducts and heats the booster chamber 4 again, causing the air pressure to increase rapidly. Large, to further improve the arc extinguishing speed of the single voltage circuit breaker.
本实施例中的喷射孔32正对静触点1和动触点2的端部，当电弧产生时，从端部即对电弧进行熄灭，能够实现高效灭弧。The injection hole 32 in this embodiment faces the ends of the static contact 1 and the movable contact 2. When an arc is generated, the arc is extinguished from the end, which can realize efficient arc extinguishing.
本发明结构简单，省去了原有打压断路器中的活塞机构；同时本发明的体积小巧，有效减小断路器占用的空间；由于SF6气体31在发生反应后产生有害物质，本发明能够有效将有害气体回收并限制在灭弧腔3内，同时保证整个灭弧室呈低压状态，进一步防止有害气体外泄；更重要的是，电弧越大，加热金属丝411产生的热量越大，增压腔4内的气压增加越快，此时SF6气体31喷射越多，无需调节结构即可根据电弧大小高效灭弧。The structure of the present invention is simple, and the piston mechanism in the original pressure circuit breaker is omitted; meanwhile, the volume of the present invention is small and exquisite, which effectively reduces the space occupied by the circuit breaker; since the SF6 gas 31 produces harmful substances after the reaction, the present invention can effectively The harmful gas is recovered and confined in the arc extinguishing chamber 3, and at the same time, the entire arc extinguishing chamber is guaranteed to be in a low pressure state, further preventing the leakage of harmful gas; more importantly, the larger the arc, the greater the heat generated by the heating wire 411, increasing the The faster the air pressure in the pressure chamber 4 increases, the more SF6 gas 31 is sprayed at this time, and the arc can be extinguished efficiently according to the size of the arc without adjusting the structure.
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.
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| CN112271103B (en) * | 2020-11-02 | 2023-04-11 | 广东电网有限责任公司东莞供电局 | Vacuum circuit breaker |
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| FR2744562B1 (en) * | 1996-02-06 | 1998-02-27 | Gec Alsthom T & D Sa | REMOTE PRESSURE RELIEF DEVICE FOR GAS FILLING A CIRCUIT BREAKER |
| CN101276702A (en) * | 2008-04-29 | 2008-10-01 | 王世有 | Hexafluoride sulphur circuit breaker with heating protecting equipment |
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