WO2024007845A1 - 灭弧机构 - Google Patents

灭弧机构 Download PDF

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Publication number
WO2024007845A1
WO2024007845A1 PCT/CN2023/100910 CN2023100910W WO2024007845A1 WO 2024007845 A1 WO2024007845 A1 WO 2024007845A1 CN 2023100910 W CN2023100910 W CN 2023100910W WO 2024007845 A1 WO2024007845 A1 WO 2024007845A1
Authority
WO
WIPO (PCT)
Prior art keywords
arc
arc extinguishing
piece
movable contact
starting
Prior art date
Application number
PCT/CN2023/100910
Other languages
English (en)
French (fr)
Inventor
敖登贵
袁小琴
陆登宇
严丽君
付浩
徐永富
郭永峰
黄甫
Original Assignee
上海正泰智能科技有限公司
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
Publication date
Application filed by 上海正泰智能科技有限公司 filed Critical 上海正泰智能科技有限公司
Priority to MX2024011569A priority Critical patent/MX2024011569A/es
Priority to EP23834619.1A priority patent/EP4492426A1/en
Publication of WO2024007845A1 publication Critical patent/WO2024007845A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H2009/365—Metal parts using U-shaped plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts

Definitions

  • Circuit breakers are mainly used to carry normal operating current. In addition, they must be able to break fault currents in lines. During the breaking process of large fault currents, arcs will be generated. Since arcs will have adverse effects on current-carrying lines and circuit breakers, serious consequences will be caused. Sometimes it may even directly damage the current-carrying equipment. Therefore, how to quickly transfer and eliminate arc is very important. Especially for DC circuit breaker products, how to transfer and eliminate arc has become a key and difficult point in the design.
  • the first magnetizing sheet is parallel to the partition plate, the first magnetizing sheet, the arc striking structure and the arc striking sheet form a first magnetic loop, the first magnetic loop is used to generate a force that pushes the arc entering the arc extinguishing chamber toward the exhaust port of the arc extinguishing chamber.
  • it includes two arc extinguishing chambers, and both arc extinguishing chambers are equipped with the first magnetizing mechanism.
  • the arc extinguishing mechanism further includes a second magnetization mechanism, and the second magnetization mechanism includes a relatively Two second magnetizing pieces are provided, and the two second magnetizing pieces are arranged on both sides of the movement track of the movable contact in the open position and the closed position.
  • the second magnetizing piece and the arc-starting piece form a second magnetic circuit, and the second magnetic circuit is used to form a force that pushes the arc generated during breaking toward the air inlet of the arc extinguishing chamber.
  • the arc extinguishing chamber is arranged inside the casing, and the first magnetization sheet is arranged outside the casing.
  • the static contact includes a contact plate
  • the contact plate includes a connecting portion provided with a static contact
  • the magnetic conductive block is installed on the side of the connecting portion away from the movable contact.
  • the two arc-starting pieces are respectively a first arc-starting piece and a second arc-starting piece, the first arc-starting piece and the second arc-starting piece cooperate with the static contact and the movable contact respectively.
  • the arc-starting piece includes a contact portion and an arc-starting portion that are bent and connected. The contact portion of the first arc-starting piece is connected to a static contact, and the arc-starting portion of the first arc-starting piece extends to one of the arc extinguishing chambers.
  • the housing is provided with a first groove and a second groove on the outside of the two side walls, and the first magnetizing piece and the second magnetizing piece are installed in the first groove and the second groove respectively. inside and covered with insulating panels.
  • the end of the two arc extinguishing chambers that are close to each other is the air inlet, and the end that is far away from each other is the exhaust port.
  • the two sets of arc extinguishing chambers are symmetrically arranged at both ends of the bottom of the casing, and the two end side walls of the casing are There are two air outlets arranged symmetrically, and the two air outlets correspond to the exhaust outlets of the two sets of arc extinguishing chambers respectively.
  • guide surfaces are respectively provided at the upper and lower ends of the air outlets on both sides, and the guide surfaces are in the shape of an inclined plane or a curved surface.
  • At least part of the arc-extinguishing grids of each group of arc-extinguishing chambers are respectively provided with arc ignition grooves at the end close to the other group of arc-extinguishing chambers, and the arc-extinguishing grids are provided with diffusion grooves connected to the bottom of the arc-ignition grooves,
  • the maximum inner diameter of the diffusion channel is larger than the inner diameter of the bottom of the diffusion channel.
  • the two sets of arc extinguishing chambers are symmetrically arranged at both ends of the bottom of the housing; the tripper is arranged on the top side of one set of arc extinguishing chambers, the static contacts are arranged on the top side of the other set of arc extinguishing chambers, and the movable contacts Located between the tripper and the static contact.
  • the housing is provided with a fourth sealed space for accommodating the arc extinguishing chamber, and a first sealed space for accommodating the movable contact.
  • the first enclosed space is provided with a rotating shaft connected to the movable contact, and the movable contact is The head is located in the first enclosed space, and one end of the movable contact with the movable contact extends into the fourth enclosed space.
  • the first enclosed space and the fourth enclosed space are connected by an arc-shaped swing provided on the movable contact.
  • the insulating chute on the baffle and the housing cooperates with the swing baffle to achieve insulating isolation between the first sealed space and the fourth sealed space during the movement of the movable contact.
  • the housing is provided with a second airtight space for accommodating the static contact
  • the stationary contact is arranged in the second airtight space, and only the stationary contact point of the stationary contact is exposed in the fourth airtight space.
  • the housing is provided with a third enclosed space for accommodating a release device, the release device is connected to the first connection piece, the movable contact is connected to the second connection piece, and the first connection piece is connected to the first connection piece.
  • the second lugs are connected, and the first enclosed space and the third enclosed space are separated by a first baffle and a second baffle arranged in a staggered manner, and a space is formed between the first baffle and the second baffle for accommodating the Wiring slots for the first lug and the second lug.
  • the arc-extinguishing grids of the two sets of arc-extinguishing chambers are installed on two opposite partitions.
  • the arc-extinguishing mechanism created by the present invention uses the arc-starting blade to guide the arc based on the existing arc-starting blade, and uses the arc-starting blade to form a magnetic circuit for driving the movement of the arc.
  • the arc-extinguishing grid at the bottom of the arc-extinguishing grid forms a first magnetic circuit.
  • the first magnetic circuit is used to generate a force that pushes the arc entering the arc-extinguishing chamber toward the exhaust port of the arc-extinguishing chamber, which can accelerate the movement of the arc. speed, further increasing the speed of extinguishing the arc.
  • a second magnetic circuit is formed by the second magnetization and the arc-starting piece.
  • the second magnetic circuit is used to push the arc generated when the moving and static contacts are broken toward the air inlet direction of the arc extinguishing chamber. force, which can further increase the speed of arc extinguishing.
  • Figure 1 is a schematic structural diagram of the arc extinguishing mechanism
  • Figure 2 is a schematic structural diagram of the shell
  • Figure 3 is a schematic structural diagram of the moving contact
  • Figure 4 is a schematic structural diagram of the arc extinguishing grid
  • Figure 5 is a schematic structural diagram of the first arc ignition piece
  • Figure 6 is a schematic structural diagram of the second arc ignition piece
  • Figure 7 is a schematic structural diagram of the arc extinguishing chamber
  • Figure 8 is another structural schematic diagram of the arc extinguishing grid
  • Figure 9 is a schematic structural diagram of the insulation board
  • Figure 10 is a schematic diagram of the magnetic field in the circuit breaker
  • Figure 11 is a schematic diagram of the first magnetic circuit and the second magnetic circuit.
  • circuit breaker created by the present invention is not limited to the description of the following embodiments.
  • the arc extinguishing mechanism created by the present invention includes an arc extinguishing chamber 37.
  • the arc extinguishing chamber 37 includes two partitions 41 and a plurality of arc extinguishing grids arranged between the two partitions 41.
  • the arc-extinguishing grid piece 28 is provided with an arc-starting piece that cooperates with the movable contact 23 or the static contact 26 on the top of the arc-extinguishing grid piece 28.
  • the arc-extinguishing mechanism also includes a first magnetization mechanism, and the first magnetization mechanism includes a relatively Two first magnetization plates 34 are provided on both sides of the plurality of arc extinguishing grid plates 28.
  • the arc-extinguishing mechanism created by the present invention uses the arc-starting blade to guide the arc based on the existing arc-starting blade, and uses the arc-starting blade to form a magnetic circuit for driving the arc movement.
  • the first magnetic circuit is used to generate a force that pushes the arc entering the arc-extinguishing chamber toward the exhaust port of the arc-extinguishing chamber, which can accelerate the arc extinguishing chamber.
  • the speed at which the arc moves further increases the speed at which the arc is extinguished.
  • a circuit breaker is shown in Figure 1.
  • the circuit breaker in this embodiment includes an arc extinguishing mechanism created by the present invention.
  • the arc extinguishing mechanism in this embodiment includes two arc extinguishing chambers 37 and two arc ignition blades.
  • the above-mentioned arc extinguishing chamber 37 is equipped with the first magnetizing mechanism.
  • the casing 21 of the circuit breaker is provided with an arc extinguishing chamber 37, a release 22, a moving contact 23 and a static contact 26.
  • the bottom of the casing 21 is provided with two sets of arc extinguishing chambers 37, so
  • the tripper 22, the movable contact 23 and the static contact 26 are arranged on the top side of the arc extinguishing chamber 37.
  • Two sets of arc extinguishing chambers 37 are respectively a left arc extinguishing chamber and a right arc extinguishing chamber.
  • the left and right sides of the two sets of arc extinguishing chambers 37 are symmetrically arranged at both ends of the bottom of the shell 21.
  • Each group of arc extinguishing chambers 37 includes a plurality of arc extinguishing chambers.
  • Arc extinguishing grids 28 are stacked at intervals and two arc extinguishing chambers
  • the end of 37 that is close to each other is the air inlet, and the end that is far away from each other is the exhaust port;
  • the tripper 22 is set on the top side of the left arc extinguishing chamber,
  • the static contact 26 is set on the top side of the right arc extinguishing chamber, and
  • the movable contact 23 is located between the tripper 22 and the static contact 26.
  • the swing trajectory of the moving contact 23 when it is broken is from a position close to the right arc extinguishing chamber to a position close to the left arc extinguishing chamber.
  • the left and right sides of the housing 21, that is, the side walls at both ends of the housing 21 are also provided with two symmetrically arranged air outlets 29.
  • the two air outlets 29 are respectively connected with the two sets of arc extinguishing chambers 37.
  • the exhaust ports of the arc extinguishing chambers 37 are correspondingly matched, and the gases discharged from the exhaust ports of the two sets of arc extinguishing chambers 37 are discharged from the casing 21 through the two air outlets 29 respectively.
  • guide surfaces 312 are respectively provided at the upper and lower ends of the gas outlets 29 on both sides.
  • the guide surfaces 312 are in the shape of an inclined plane or a curved surface, which can accelerate the hot air flow generated by the arc to be discharged from the gas outlet 29 .
  • an arc baffle 31 is provided at the air outlet 29.
  • the arc baffle 31 is provided with a plurality of small exhaust holes.
  • the arc baffle 31 is used to block metal particles.
  • the arc-starting piece includes a contact portion 433 and an arc-starting portion 432 that are bent and connected, wherein the contact portion 433 of the first arc-starting piece 42 is connected to the static contact 26,
  • the arc striking portion 432 of the first arc striking piece 42 extends above one of the arc extinguishing chambers 37 (right arc extinguishing chamber); when the arc angle 32 of the movable contact 23 is in the fully open position, it is in contact with the second arc striking piece.
  • the contact portion 433 of the second arc ignition piece 43 is in contact and matched, and the arc ignition portion 432 of the second arc ignition piece 43 extends above the other arc extinguishing chamber 37 (left arc extinguishing chamber).
  • the arc extinguishing grid piece 28 of the arc chamber 37 corresponds to the top side of the two first magnetizing pieces 34 of the first magnetizing mechanism and the arc starting portion 432 of the second arc starting piece 43 are located on the top side of the right arc extinguishing chamber 37 corresponding to the sides, so that the arc striking portion 432 of the second arc striking piece 43 is located on the top side of the right arc extinguishing chamber 37 and the longitudinal cross-section of the corresponding two first magnetizing pieces 34 is U-shaped; the moving contact 23 When the arc angle 32 is in the fully open position, it contacts the contact portion 433 of the first arc ignition piece 42 The arc striking portion 432 of the first arc striking piece 42 extends to the top side of the left arc extinguishing chamber 37, and the top sides of the two first magnetizing pieces 34 are in contact with the arc striking portion of the first arc striking piece 42.
  • the arc extinguishing grids 28 at the bottom of the two arc extinguishing chambers 37 are electrically connected or are integrally formed arc striking structures 27.
  • the arc-extinguishing grids 28 of the two sets of arc-extinguishing chambers 37 are installed on the same two partitions 41, and the two sides of the arc-extinguishing grids 28 of the two sets of arc-extinguishing chambers 37 are connected to the arc-extinguishing grids 28 by riveting or other means.
  • the two partitions 41 are connected to form a whole, which not only reduces the difficulty of assembly, but also improves the air tightness of the arc extinguishing chamber 37, which is more conducive to the air blowing effect on the arc.
  • the partition 41 is made of a gas-generating insulating material.
  • the gas-generating insulating material can also generate gas on the insulating contact, accelerate the flow of air in the arc extinguishing chamber 37, and is also beneficial to the gas blowing effect on the arc.
  • the arc extinguishing mechanism also includes a second magnetization mechanism.
  • the second magnetization junction includes two second magnetization pieces 35 arranged oppositely.
  • the two second magnetization pieces 35 are arranged at Describe both sides of the motion trajectory of the open position and closed position of the movable contact.
  • the second magnetizing piece 35 and the arc-starting piece form a second magnetic circuit.
  • the second magnetic circuit is used to push the arc generated when the moving and static contacts are broken to form a force pushing toward the air inlet, which can further improve the The speed at which the arc is extinguished.
  • the two first magnetizing mechanisms form two first magnetic circuits.
  • the two first magnetic circuits are the right magnetic circuit a and the left magnetic circuit b respectively.
  • the first magnetizing piece 34 and the arc striking grid piece 27 on both sides of the casing of 42 constitute the right magnetic circuit a, which is composed of the second arc igniting piece 43 and the first arc igniting piece 43 on both sides of the casing close to the second arc igniting piece 43.
  • the arc extinguishing chamber 37 is provided inside the housing 21
  • the first magnetization sheet 34 is provided outside the housing 21 .
  • the housing 21 is provided with a first groove 46 and a second groove 461 on the outer sides of the two side walls, and the first magnetizing piece 34 and the second magnetizing piece 35 are respectively installed in the first grooves. 46 and the second groove 461 and covered with the insulating plate 36 .
  • the first magnetizing sheet 34 and the second magnetizing sheet 35 are placed outside the housing 21 for easier fixing and installation, and at the same time, they can be reliably isolated from the arc extinguishing grid 28 inside the housing 21 .
  • the arc extinguishing mechanism also includes a magnetic permeable block 25 , which is disposed on the side of the static contact 26 away from the movable contact 23 and between the two second magnetizing pieces 35 , two second magnetizing sheets 35 are arranged oppositely on both sides of the movable contact 23, corresponding to the swing trajectory of the movable contact 23, one end of the two second magnetizing sheets 35 is respectively connected to both sides of the magnetic conductive block 25 The sides match correspondingly, and the other ends of the two second magnetizing pieces 35 are respectively located on both sides of the fully open position of the movable contact 23 .
  • the two second magnetizing pieces 35 and the magnetic permeable block 25 form a U-shaped structure surrounding the static contact 26, that is, the transverse cross-section of the second magnetizing mechanism is roughly U-shaped.
  • the second magnetization mechanism composed of the magnetic permeable block 25 and the two second magnetization sheets 35 can form a magnetic field surrounding the static contact 26 and the moving contact 23, strengthen the magnetic flux density of the environmental magnetic field around the static contact 26, and increase
  • the electric force that pulls the arc toward the arc extinguishing chamber 37 facilitates the movement of the arc toward the arc extinguishing chamber 37 and reduces the arc stagnation time.
  • the stationary contact 26 includes a contact plate.
  • the contact plate includes an extension portion 264 extending out of the housing 21 and a connection portion connected to the extension portion 264 .
  • the connection portion is close to the movable contact 23
  • a static contact 261 is provided on the side.
  • the magnetic conductive block 25 is installed on the side of the connecting part away from the movable contact 23.
  • the static contact 261 is a silver point.
  • the housing 21 is formed by an insulating structure and is provided with a first sealed space, a second sealed space, a third sealed space and a fourth sealed space.
  • the fourth sealed space is located below the first sealed space, the second sealed space and the third sealed space.
  • the arc extinguishing chamber 37, the first arc starting blade 42 and the second arc starting blade 43 are arranged in the fourth sealed space.
  • the movable contact 23 is located in the first enclosed space.
  • One end of the movable contact 23 with a moving contact extends into the fourth enclosed space.
  • the first sealed space and the fourth sealed space are connected by an arc-shaped swing baffle 33 provided on the movable contact 23 and an insulator on the housing 21 that cooperates with the swing baffle 33.
  • the chute 47 realizes insulation isolation between the first sealed space and the fourth sealed space during the movement of the movable contact 23 .
  • a wiring groove for accommodating the first wiring lug 221 and the second wiring lug 231 is formed between the first baffle and the second baffle, that is, achieving Insulation separation is eliminated, and the assembly connection of the first wiring lug 221 and the second wiring lug 231 is realized.
  • This embodiment uses four relatively independent sealed spaces to help prevent arcs and high-temperature gases and particles generated by arcs from entering the structure of the moving contacts 23, static contacts 26, and tripper 22, and has good isolation and insulation functions.
  • the movable contact 23 is installed on the rotating shaft 24, and the housing 21 is provided with a movement groove between the rotating shaft 24 and the arc extinguishing chamber 37, and the movement groove allows the movement of the movable contact 23, so
  • An insulation structure is provided around the movement groove, and the insulation structure can prevent arcs and high-temperature gases and particles generated by the arc from entering into other parts of the housing 21 from the movement groove.
  • the insulation structure includes an arc-shaped swing baffle 33 provided on the movable contact 23, and an insulating chute 47 matching the swing baffle 33 is provided on the housing 21. The baffle 33 achieves insulation isolation from the arc extinguishing chamber 37 during the movement of the movable contact 23 .
  • the housing 21 is provided with a release 22 connected to the movable contact 23 on one side of the rotating shaft 24.
  • the release is connected to the first terminal piece 221.
  • the movable contact 23 Connected to the second wiring piece 231, the first wiring piece 221 is connected to the second wiring piece 231, the insulation structure includes a first baffle and a second baffle arranged in a staggered manner, between the first baffle and the second baffle. plates are formed between plates to accommodate the first lugs 221 and the second wiring lug 231.
  • the wiring groove is only for accommodating the wiring board 221 and the wiring board 231. The rest is isolated by the first baffle and the second baffle.
  • the space of the release 22 and the space of the arc extinguishing chamber 37 are isolated by insulating materials to avoid direct connection between the two.
  • the insulation structure surrounding the motion slot not only facilitates the rapid transfer and extinguishing of the arc, but also facilitates the discharge of high-temperature gas generated by the arc from the air outlets 29 on both sides of the housing 21, and can also prevent the high-temperature gas generated by the arc from Particles enter the rotating shaft and release parts and cause damage.
  • the arc extinguishing grid 28 has a second protrusion 283, and the arc starting grid 27 has a first protrusion 273.
  • the first protrusion 273 and the second protrusion 283 are both Insert into the corresponding hole of the partition 41, the same arc-extinguishing grid 28 is provided with second protrusions 283 on both sides, and both sides of the arc-igniting grid 27 are provided with first protrusions 273. All arc-extinguishing grids 28 and After the arc ignition grid 27 is assembled, the partition plates 41 on both sides are assembled into an integral arc extinguishing chamber 37 .
  • the integrated grid set with all the arc extinguishing grids 28 installed together is easier to install.
  • the integrated set of arc extinguishing grids 28 has better air tightness and is more conducive to the air blowing effect on the arc.
  • the two air outlets 29 on both sides of the arc extinguishing chamber 37 are in the direction perpendicular to the arc extinguishing grids.
  • the air outlets 29 are located in the middle position of the corresponding arc extinguishing chamber 37 along the arrangement direction of the arc extinguishing grids 28, and
  • the air outlets 29 on both sides are arranged left and right symmetrically, and the upper and lower ends of the air outlets 29 on both sides are respectively provided with inclined or curved guide surfaces 312, which facilitates the hot air flow generated by the arc to be discharged from the air outlet 29.
  • the arc root on one side of the arc moves from the static contact 261 to the second arc starting piece 43 connected to the static terminal board 26
  • the arc root on the other side of the arc moves in the direction of the upper arc angle 32 of the movable contact 23 as the movable contact 23 opens, and the arc receives a force that causes it to move toward the arc extinguishing chamber 37 .
  • the movable contact 23 is fully opened to the position of the arc ignition piece 42, the arc is transferred from the arc angle 32 of the movable contact 23 to the arc ignition piece 42, and the arc completely enters the arc extinguishing chamber 37 until it is extinguished.
  • This embodiment uses an arc-starting piece and a second magnetizing piece arranged outside the side wall of the housing to form a magnetizing mechanism, which is beneficial to speeding up the arc extinguishing and is easy to assemble. It is understandable that the internal magnetic structure does not need to be used. Utilizing the existing arc-starting blade and arranging the internal magnetic structure separately on the side of the arc-starting blade also falls within the protection scope of the present invention.

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

一种灭弧机构，包括灭弧室，所述灭弧室包括两个隔板以及设置在两个隔板之间的多个灭弧栅片，在灭弧栅片顶部设有与动触头或者静触头配合的引弧片，所述灭弧机构还包括第一增磁机构，所述第一增磁机构包括相对设置在多个灭弧栅片两侧的两个第一增磁片，以及设置在所述灭弧栅片底部的引弧结构，所述第一增磁片平行所述隔板，所述第一增磁片、引弧结构与所述引弧片形成第一磁回路，所述第一磁回路用于对进入灭弧室的电弧产生向灭弧室的排气口方向推动的力，通过所述第一增磁片与所述引弧片，以及灭弧栅片底部的灭弧栅片形成第一磁回路，能够加速电弧移动的速度，进一步提高熄灭电弧的速度。

Description

灭弧机构 技术领域
本发明创造涉及低压电器领域，具体涉及一种灭弧机构。
背景技术
断路器主要用于承载正常的工作电流，此外还要能够分断线路中出现的故障电流，故障大电流的分断过程中会产生电弧，由于电弧会对载流线路及断路器产生不利的影响，严重时甚至会直接损毁载流设备。因此如何能够快速转移及消除电弧显得至关重要，尤其对于直流类断路器产品，如何转移及消除电弧成了设计中的重点及难点。
发明内容
本发明创造的目的在于克服现有技术的缺陷，提供一种灭弧能力强、装配方便的断路器。
为实现上述目的，本发明创造采用了如下技术方案：
一种灭弧机构，包括灭弧室，所述灭弧室包括两个隔板以及设置在两个隔板之间的多个灭弧栅片，在灭弧栅片顶部设有与动触头或者静触头配合的引弧片，所述灭弧机构还包括第一增磁机构，所述第一增磁机构包括相对设置在多个灭弧栅片两侧的两个第一增磁片，以及设置在所述灭弧栅片底部的引弧结构，所述第一增磁片平行所述隔板，所述第一增磁片、引弧结构与所述引弧片形成第一磁回路，所述第一磁回路用于对进入灭弧室的电弧产生向灭弧室的排气口方向推动的力。
优选的，包括两个所述的灭弧室，两个所述的灭弧室均设有所述第一增磁机构。
优选的，所述两个灭弧室底部的灭弧栅片导通构成所述引弧结构或者所述两个灭弧室底部的灭弧栅片一体成型构成所述引弧结构。
优选的，所述灭弧机构还包括第二增磁机构，所述第二增磁机构包括相对 设置的两个第二增磁片，两个第二增磁片设置在动触头打开位置和闭合位置的运动轨迹两侧。
优选的，所述第二增磁片与所述引弧片形成第二磁回路，所述第二磁回路用于对分断时产生的电弧形成向灭弧室的进气口方向推动的力。
优选的，所述灭弧室设置在壳体内侧，所述第一增磁片设置在壳体外侧。
优选的，还包括导磁块，所述导磁块设置在静触头远离动触头的侧面，且位于两个第二增磁片之间。
优选的，所述静触头包括接触板，接触板包括设有静触点的连接部，所述导磁块安装在连接部远离动触头的侧面。
优选的，包括两个引弧片，两个引弧片分别为第一引弧片和第二引弧片，第一引弧片和第二引弧片分别与静触头和动触头配合；所述引弧片包括弯折相连的接触部和引弧部，所述第一引弧片的接触部与静触头连接，第一引弧片的引弧部延伸至其中一个灭弧室上方；所述动触头的弧角在完全打开位置时与所述第二引弧片的接触部接触配合，第二引弧片的引弧部延伸至其中另一灭弧室上方。
优选的，所述引弧片上设有引弧沟。
优选的，所述壳体相对两个侧壁的外侧均设有第一凹槽和第二凹槽，第一增磁片及第二增磁片分别装于第一凹槽及第二凹槽内，并用绝缘板覆盖。
优选的，两个灭弧室相互靠近的一端为进气口，相互远离的一端为排气口，两组灭弧室呈对称布置于壳体底部两端，所述壳体的两端侧壁设有对称设置的两个出气口，两个出气口分别与两组灭弧室的排气口对应。
优选的，在两侧出气口的上下两端分别设有引导面，引导面为斜面或曲面形状。
优选的，每组灭弧室的至少部分灭弧栅片在靠近另一组灭弧室的端部分别设有引弧槽，在灭弧栅片上设有与引弧槽底部连通的扩散槽，扩散槽的最大内径大于扩散槽底部的内径。
优选的，两组灭弧室呈对称布置于壳体底部两端；脱扣器设置在其中一组灭弧室顶侧，静触头设置在其中另一组灭弧室顶侧，动触头位于脱扣器和静触头之间。
优选的，所述壳体内设有容纳灭弧室的第四密闭空间，容纳动触头的第一密闭空间，所述第一密闭空间内设有与动触头连接的转轴，所述动触头位于第一密闭空间内，动触头设有动触点的一端伸入第四密闭空间内，第一密闭空间和第四密闭空间之间通过设置在动触头上呈弧面形状的摆动挡板和壳体上与所述摆动挡板配合的绝缘滑槽，在动触头运动过程中实现第一密闭空间与第四密闭空间之间绝缘隔断。
优选的，所述壳体内设有容纳静触头的第二密闭空间，静触头设置在第二密闭空间内，静触头仅静触点露于第四密闭空间内。
优选的，所述壳体内设有容纳脱扣器的第三密闭空间，所述脱扣器与第一接线片连接，所述动触头与第二接线片连接，所述第一接线片与第二接线片连接，第一密闭空间和第三密闭空间之间通过错位设置的第一挡板和第二挡板分隔，在第一挡板和第二挡板之间形成用于容纳所述第一接线片和第二接线片的接线槽。
优选的，两组灭弧室的灭弧栅片安装在相对设置的两个隔板上。
本发明创造的灭弧机构，在现有引弧片引导电弧的基础上，利用引弧片形成用于驱动电弧移动的磁回路，通过所述第一增磁片与所述引弧片，以及灭弧栅片底部的灭弧栅片形成第一磁回路，所述第一磁回路用于对进入灭弧室的电弧产生向灭弧室的排气口方向推动的力，能够加速电弧移动的速度，进一步提高熄灭电弧的速度。
此外，通过所述第二增磁与所述引弧片形成第二磁回路，所述第二磁回路用于对动静触头分断时产生的电弧形成向灭弧室的进气口方向推动的力，能够进一步提高熄灭电弧的速度。
附图说明
图1是灭弧机构的结构示意图；
图2是壳体的结构示意图；
图3是动触头的结构示意图；
图4是灭弧栅片的结构示意图；
图5是第一引弧片的结构示意图；
图6是第二引弧片的结构示意图；
图7是灭弧室的结构示意图；
图8是灭弧栅片的另一结构示意图；
图9是绝缘板的结构示意图；
图10是断路器内的磁场示意图；
图11是第一磁回路和第二磁回路的示意图。
具体实施方式
以下结合附图给出的实施例，进一步说明本发明创造的断路器的具体实施方式。本发明创造的断路器不限于以下实施例的描述。
如图1-2所述，本发明创造的灭弧机构，包括灭弧室37，所述灭弧室37包括两个隔板41以及设置在两个隔板41之间的多个灭弧栅片28，在灭弧栅片28顶部设有与动触头23或者静触头26配合的引弧片，所述灭弧机构还包括第一增磁机构，所述第一增磁机构包括相对设置在多个灭弧栅片28两侧的两个第一增磁片34，所述第一增磁片34平行所述隔板41，所述第一增磁片34与所述引弧片，以及灭弧室37底部的灭弧栅片28形成第一磁回路，所述第一磁回路用于对进入灭弧室37的电弧产生向灭弧室37的排气口方向推动的力。
本发明创造的灭弧机构，在现有引弧片引导电弧的基础上，利用引弧片形成用于驱动电弧移动的磁回路，通过所述第一增磁片34与所述引弧片，以及灭弧栅片28底部的灭弧栅片28形成第一磁回路，所述第一磁回路用于对进入灭弧室的电弧产生向灭弧室的排气口方向推动的力，能够加速电弧移动的速度，进一步提高熄灭电弧的速度。
如图1所示的一种断路器，本实施例的断路器包括本发明创造的灭弧机构，本实施例的灭弧机构包括两个灭弧室37和两个引弧片，两个所述的灭弧室37均设有所述第一增磁机构。具体的，断路器的壳体21内设有灭弧室37、脱扣器22、动触头23和静触头26，所述壳体21内的底部设有两组灭弧室37，所述脱扣器22、动触头23和静触头26设置在灭弧室37顶侧。两组灭弧室37，分别为左灭弧室和右灭弧室，图中两组灭弧室37左右两边呈对称布置于壳体21底部两端，每组灭弧室37均包括多个间隔层叠设置的灭弧栅片28，两个灭弧室 37相互靠近的一端为进气口，相互远离的一端为排气口；所述脱扣器22设置在左灭弧室顶侧，静触头26设置在右灭弧室顶侧，动触头23位于脱扣器22和静触头26之间，动触头23分断时的摆动轨迹为从靠近右灭弧室的位置向靠近左灭弧室的位置摆动，动触头23与静触头26接触闭合时位于右灭弧室顶侧，动触头23摆动到完全打开位置时位于左灭弧室顶侧。两个引弧片分别为第一引弧片42和第二引弧片43，第一引弧片42和第二引弧片43分别与静触头26和动触头23配合，用于将动触头23和静触头26分断时产生的电弧分别引入两个灭弧室37内，第一引弧片42位于左灭弧室顶侧，且位于脱扣器22和左灭弧室之间，第二引弧片43位于右灭弧室顶侧顶侧，且位于静触头26与右灭弧室之间。
如图1所示，所述壳体21的左右两侧，即壳体21两端的侧壁上还设有对称设置的两个出气口29，两个出气口29分别与两组灭弧室37的排气口对应配合，两组灭弧室37的排气口排出的气体分别从两个出气口29排出外壳21。优选的，在两侧出气口29的上下两端分别设有引导面312，引导面312为斜面或曲面形状，能够加速电弧产生的热气流从出气口29排出。优选的，在出气口29处设有挡弧板31，所述挡弧板31上设有多个小的排气孔，挡弧板31用于阻挡金属粒子。
如图1、5-6所示，所述引弧片包括弯折相连的接触部433和引弧部432，其中，所述第一引弧片42的接触部433与静触头26连接，第一引弧片42的引弧部432延伸至其中一个灭弧室37(右灭弧室)上方；所述动触头23的弧角32在完全打开位置时与所述第二引弧片43的接触部433接触配合，第二引弧片43的引弧部432延伸至其中另一灭弧室37(左灭弧室)上方。
具体的，所述第二引弧片43的接触部433与静触板262位于静触点261下方的连接部263进行焊接或用其他方式连接，使两者能够紧密接触连接，第二引弧片43的引弧部432延伸至右灭弧室37顶侧上方，基本于灭弧栅片28平行，参见图1、11，第一增磁机构的两个第一增磁片34与对应灭弧室37的灭弧栅片28对应，第一增磁机构的两个第一增磁片34的顶端侧边与第二引弧片43的引弧部432位于右灭弧室37顶侧部分的侧边对应，使第二引弧片43的引弧部432位于右灭弧室37顶侧部分和对应的两个第一增磁片34的纵向截面呈U型；所述动触头23的弧角32在完全打开位置时与所述第一引弧片42的接触部433接 触配合，所述第一引弧片42的引弧部432延伸到左灭弧室37顶侧上方，两个第一增磁片34的顶端侧边与第一引弧片42的引弧部432位于左灭弧室37顶侧部分的侧边对应，第一引弧片42的引弧部432位于左灭弧室37上方的部分和对应的两个第一增磁片34的纵向截面呈U型。
如图1、8、10所示，两个所述灭弧室37底部的灭弧栅片28导通或者为一体成型的引弧结构27。具体的，两组灭弧室37的灭弧栅片28安装在相同的两个隔板41上，两组灭弧室37的灭弧栅片28的两侧分别通过铆接或其它方式与所述两个隔板41连接，通过两个隔板41连接成为一个整体，不仅能够降低装配的难度，而且能够提高灭弧室37的气密性，更利于对电弧的气吹作用。优选的，所述隔板41为产气绝缘材料，产气绝缘材料在绝缘的接触上，还可以产生气体，加速灭弧室37内空气的流动，同样有利于对电弧的气吹作用。
如图4所示，所述灭弧室37包括多个层叠间隔设置的灭弧栅片28，每组灭弧室37的至少部分灭弧栅片28在靠近另一组灭弧室37的端部分别设有引弧槽281，两组灭弧室37的灭弧栅片28的引弧槽281相对设置，灭弧室37设有引弧槽281的一端为灭弧室37的进气口，在灭弧栅片28上设有与引弧槽281底部连通的扩散槽282，扩散槽282的最大内径大于扩散槽282底部的内径，本实施例的扩散槽282为圆形，也可以为多边形当电弧通过引弧槽281运动至扩散槽282时，电弧能量可以在扩散槽282的边缘扩散，更有利于电弧的熄灭。所述两组灭弧室37到动触头23距离最远的若干个灭弧栅片28相连成一体结构且不设置引弧槽281形成引弧栅片27，本实施例中两组灭弧室37到动触头23距离最远的一个灭弧栅片28相连后形成的引弧栅片27，引弧栅片27能够拉长电弧，更利于电弧的熄灭。
如图11所示，所述灭弧机构还包括第二增磁机构，所述第二增磁结包括相对设置的两个第二增磁片35，两个第二增磁片35设置在所述动触头打开位置和闭合位置的运动轨迹两侧。进一步，所述第二增磁片35与引弧片形成第二磁回路，所述第二磁回路用于对动静触头分断时产生的电弧形成向进气口方向推动的力，能够进一步提高熄灭电弧的速度。特别是通过引弧片、设置第一增磁机构和第二增磁机构的组合，第二增磁机构形成的第二磁回路用于将产生的电弧向进气口方向推动进入灭弧室，引弧片起到引导作用，第一增磁机构形成的第 一磁回路则将进入灭弧室的电弧向排气口方向推动，加速电弧的熄灭。
具体的，两个第一增磁机构形成两个第一磁回路，两个第一磁回路分别为右磁回路a和左磁回路b，由第一引弧片42及靠近第一引弧片42的壳体两侧的第一增磁片34及引弧栅片27构成所述右磁回路a，由第二引弧片43及靠近第二引弧片43的壳体两侧的第一增磁片34及引弧片27构成所述左磁回路b，由壳体两侧的第二增磁片35及第一引弧片42和第二引弧片43的接触部433及导磁块25构成所述第二磁回路c，第二磁回路c、右磁回路a和左磁回路b，三组增磁回路能够促进电弧快速移动熄灭。优选的，所述引弧片上设有向对应灭弧室37延伸的引弧沟4。引弧沟4能够引导电弧向灭弧室37移动，并加速灭弧室37内电弧的移动速度
如图10所示，所述灭弧室37设置在壳体21内侧，所述第一增磁片34设置在壳体21外侧。具体的，所述壳体21相对两个侧壁的外侧均设有第一凹槽46及第二凹槽461，第一增磁片34及第二增磁片35分别装于第一凹槽46及第二凹槽461内，并用绝缘板36覆盖。第一增磁片34、第二增磁片35置于壳体21外部更易于固定、安装，同时可与壳体21内的灭弧栅片28可靠隔离。
如图1所示，所述灭弧机构还包括导磁块25，所述导磁块25设置在静触头26远离动触头23的侧面，且位于两个第二增磁片35之间，两个第二增磁片35相对设置在动触头23的两侧，对应动触头23的摆动轨迹，两个第二增磁片35的一端分别与所述导磁块25的两侧侧边对应配合，两个第二增磁片35的另一端分别对应位于动触头23完全打开位置的两侧。两个第二增磁片35和导磁块25组成围绕静触头26的U型结构，即第二增磁机构的横向截面大致呈U型。通过导磁块25和两个第二增磁片35构成的第二增磁机构，能够形成围绕静触头26和动触头23的磁场，加强静触头26周围环境磁场磁通密度，增加将电弧拉向灭弧室37的电动力，利于电弧向灭弧室37方向运动，同时减少电弧停滞时间。
如图1所示，所述静触头26包括接触板，接触板包括伸出壳体21的伸出部264，以及与伸出部264连接的连接部，在连接部靠近动触头23的侧面设有静触点261，所述导磁块25安装在连接部远离动触头23的侧面，所述静触点261为银点。
优选的，如图1所示，所述壳体21通过绝缘结构形成设有第一密闭空间、第二密闭空间、第三密闭空间和第四密闭空间。所述第四密闭空间位于第一密闭空间、第二密闭空间和第三密闭空间下方，所述灭弧室37、以及第一引弧片42、第二引弧片43设置在第四密闭空间内。
所述第一密闭空间内设有与动触头23连接的转轴24，所述动触头23位于第一密闭空间内，动触头23设有动触点的一端伸入第四密闭空间内与静触点261对应，第一密闭空间和第四密闭空间之间通过设置在动触头23上呈弧面形状的摆动挡板33和壳体21上与所述摆动挡板33配合的绝缘滑槽47，在动触头23运动过程中实现第一密闭空间与第四密闭空间之间绝缘隔断。
所述第二密闭空间位于第一密闭空间右侧，所述静触头26设置在第二密闭空间内，静触头26仅静触点261露于第四密闭空间内，其余部分被壳体21绝缘材料包裹。所述第三密闭空间位于第一密闭空间左侧，所述第三密闭空间内设有脱扣器22，脱扣器22与动触头23连接，第一密闭空间和第三密闭空间之间通过错位设置的第一挡板和第二挡板分隔，在第一挡板和第二挡板之间形成用于容纳所述第一接线片221和第二接线片231的接线槽，即实现了绝缘分隔，又实现了第一接线片221与第二接线片231的装配连接。本实施例通过四个相对独立的密闭空间，有利于防止电弧及电弧产生的高温气体及粒子进入动触头23、静触头26、脱扣器22结构内，具有良好的隔离、绝缘功能。
具体的，如图1所示，所述动触头23安装在转轴24上，所述壳体21在转轴24与灭弧室37间设有运动槽，运动槽供动触头23运动，所述运动槽的四周设有绝缘结构，绝缘结构能够防止电弧及电弧产生的高温气体及粒子从所述运动槽进入到壳体21内的其它部分进入。如图3所示，所述绝缘结构包括设置在动触头23上呈弧面形状的摆动挡板33，在壳体21上设有与所述摆动挡板33配合的绝缘滑槽47，摆动挡板33在动触头23运动过程中实现与灭弧室37之间绝缘隔断。
如图1所示，所述壳体21在转轴24的一侧设有与动触头23连接的脱扣器22，所述脱扣器与第一接线片221连接，所述动触头23与第二接线片231连接，所述第一接线片221与第二接线片231连接，所述绝缘结构包括错位设置的第一挡板和第二挡板，在第一挡板和第二挡板之间形成用于容纳所述第一接线片 221和第二接线片231的接线槽，接线槽仅供容纳接线板221及接线板231，其余部分由第一挡板和第二挡板隔离开，脱扣器22空间与灭弧室37空间通过绝缘材料隔离，避免两者直接连通。通过围绕在运动槽四周的绝缘结构，不仅更有利于电弧的快速转移及熄灭、也利于电弧产生的高温气体从壳体21两侧的出气口29排出，而且还可以防止电弧产生的高温气体及粒子进入转轴及脱扣器部分而造成损坏。
如图4、图8所示，本方案中灭弧栅片28带有第二凸起283，引弧栅片27带有第一凸起273，第一凸起273、第二凸起283均插入隔板41的对应孔中，同一灭弧栅片28两侧分别带有第二凸起283，引弧栅片27的两侧均带有第一凸起273，所有灭弧栅片28和引弧栅片27装配完成后，两侧隔板41组装成一个整体的灭弧室37。如图6所示，所有灭弧栅片28安装在一起的整体式的栅片组安装更加简便、同时，整体灭弧栅片28组气密性更好，更利于对电弧的气吹作用。
如图1所示，所述灭弧室37两侧的两个出气孔29在垂直灭弧栅片方向，出气孔29沿灭弧栅片28排列方向位于对应灭弧室37的中间位置，且两侧出气孔29呈左右对称布置，两侧出气口29上下两端分别带有斜面或曲面形状的引导面312，利于伴随电弧产生的热气流从出气口29排出。
如图10-11中虚线所示，当线路中产生短路电流时，动触头23、静触头26间由于反向电流产生的斥力，动触头23绕枢轴331(图3)打开并拉伸电弧，动触头23、静触头26间产生的电弧受动电流洛伦兹力作用，电弧一侧的弧根由静触点261向与静接线板26连接的第二引弧片43方向运动，电弧另一侧的弧根随着动触头23打开方向向着动触头23上弧角32方向运动，电弧受到使其向灭弧室37运动的力。当动触头23完全打开至引弧片42位置时，电弧从动触头23的弧角32转移至引弧片42上，电弧完全进入灭弧室37直至熄灭。
本实施例利用引弧片和设置在壳体侧壁外侧的第二增磁片形成增磁机构，有利于加快电弧熄灭的速度且装配方便，可以理解的是，所述内磁结构也可以不利用现有的引弧片，而是将内磁结构单独设置在引弧片的侧面，也属于本发明创造的保护范围。
需要说明的是，在本发明创造的描述中，术语“上”、“下”、“左”、 “右”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是使用时惯常摆放的方位或位置关系，仅是为了便于描述，而不是指示所指的装置或元件必须具有特定的方位，因此不能理解为对本发明创造的限制。此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示相对重要性。
以上内容是结合具体的优选实施方式对本发明创造所作的进一步详细说明，不能认定本发明创造的具体实施只局限于这些说明。对于本发明创造所属技术领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明创造的保护范围。

Claims (15)

  1. 一种灭弧机构，包括灭弧室(37)，所述灭弧室(37)包括两个隔板(41)以及设置在两个隔板(41)之间的多个灭弧栅片(28)，在灭弧栅片(28)顶部设有与动触头(23)或者静触头(26)配合的引弧片，其特征在于：所述灭弧机构还包括第一增磁机构，所述第一增磁机构包括相对设置在多个灭弧栅片(28)两侧的两个第一增磁片(34)，以及设置在所述灭弧栅片(28)底部的引弧结构(27)，所述第一增磁片(34)平行所述隔板(41)，所述第一增磁片(34)、引弧结构(27)与所述引弧片形成第一磁回路，所述第一磁回路用于对进入灭弧室(37)的电弧产生向灭弧室(37)的排气口方向推动的力。
  2. 根据权利要求1所述的灭弧机构，其特征在于：包括两个所述的灭弧室(37)，两个所述的灭弧室(37)均设有所述第一增磁机构。
  3. 根据权利要求2所述的灭弧机构，其特征在于：所述两个灭弧室(37)底部的灭弧栅片(28)导通构成所述引弧结构(27)或者所述两个灭弧室(37)底部的灭弧栅片(28)一体成型构成所述引弧结构(27)。
  4. 根据权利要求1-3中任一项所述的灭弧机构，其特征在于：所述灭弧机构还包括第二增磁机构，所述第二增磁机构包括相对设置的两个第二增磁片(35)，两个第二增磁片(35)设置在动触头(23)打开位置和闭合位置的运动轨迹两侧；所述第二增磁片(35)与所述引弧片形成第二磁回路，所述第二磁回路用于对分断时产生的电弧形成向灭弧室(37)的进气口方向推动的力。
  5. 根据权利要求1所述的灭弧机构，其特征在于：所述灭弧室(37)设置在壳体(21)内侧，所述第一增磁片(34)设置在壳体(21)外侧。
  6. 根据权利要求1所述的灭弧机构，其特征在于：还包括导磁块(25)，所述导磁块(25)设置在静触头(26)远离动触头(23)的侧面，且位于两个第二增磁片(35)之间。
  7. 根据权利要求2所述的灭弧机构，其特征在于：包括两个引弧片，两个引弧片分别为第一引弧片(42)和第二引弧片(43)，第一引弧片(42)和第二引弧片(43)分别与静触头(26)和动触头(23)配合；所述引弧片包括弯折相连的接触部(433)和引弧部(432)，所述第一引弧片(42)的接触部(433)与静触头(26)连接，第一引弧片(42)的引弧部(432)延伸至其中一个灭弧 室(37)上方；所述动触头(23)的弧角(32)在完全打开位置时与所述第二引弧片(43)的接触部(433)接触配合，第二引弧片(43)的引弧部(432)延伸至其中另一灭弧室(37)上方。
  8. 根据权利要求1所述的灭弧机构，其特征在于：所述引弧片上设有引弧沟(4)。
  9. 根据权利要求5所述的灭弧机构，其特征在于：所述壳体(21)相对两个侧壁的外侧均设有第一凹槽(46)和第二凹槽(461)，第一增磁片(34)及第二增磁片(35)分别装于第一凹槽(46)及第二凹槽(461)内，并用绝缘板(36)覆盖。
  10. 根据权利要求2所述的灭弧机构，其特征在于：两个灭弧室(37)相互靠近的一端为进气口，相互远离的一端为排气口，两组灭弧室(37)呈对称布置于壳体(21)底部两端，所述壳体(21)的两端侧壁设有对称设置的两个出气口(29)，两个出气口(29)分别与两组灭弧室(37)的排气口对应。
  11. 根据权利要求10所述的灭弧机构，其特征在于：在两侧出气口(29)的上下两端分别设有引导面(312)，引导面(312)为斜面或曲面形状。
  12. 根据权利要求2所述的灭弧机构，其特征在于：每组灭弧室(37)的至少部分灭弧栅片(28)在靠近另一组灭弧室(37)的端部分别设有引弧槽(281)，在灭弧栅片(28)上设有与引弧槽(281)底部连通的扩散槽(282)，扩散槽(282)的最大内径大于扩散槽(282)底部的内径。
  13. 根据权利要求2所述的灭弧机构，其特征在于：两组灭弧室(37)呈对称布置于壳体(21)底部两端；脱扣器(22)设置在其中一组灭弧室(37)顶侧，静触头(26)设置在其中另一组灭弧室(37)顶侧，动触头(23)位于脱扣器(22)和静触头(26)之间。
  14. 根据权利要求13所述的灭弧机构，其特征在于：所述壳体(21)内设有容纳灭弧室(37)的第四密闭空间，容纳动触头(23)的第一密闭空间，所述第一密闭空间内设有与动触头(23)连接的转轴(24)，所述动触头(23)位于第一密闭空间内，动触头(23)设有动触点的一端伸入第四密闭空间内，第一密闭空间和第四密闭空间之间通过设置在动触头(23)上呈弧面形状的摆动挡板(33)和壳体(21)上与所述摆动挡板(33)配合的绝缘滑槽(47)，在 动触头(23)运动过程中实现第一密闭空间与第四密闭空间之间绝缘隔断；所述壳体(21)内设有容纳静触头(26)的第二密闭空间，静触头(26)设置在第二密闭空间内，静触头(26)仅静触点(261)露于第四密闭空间内。
  15. 根据权利要求14所述的灭弧机构，其特征在于：所述壳体(21)内设有容纳脱扣器(22)的第三密闭空间，所述脱扣器(22)与第一接线片(221)连接，所述动触头(23)与第二接线片(231)连接，所述第一接线片(221)与第二接线片(231)连接，第一密闭空间和第三密闭空间之间通过错位设置的第一挡板和第二挡板分隔，在第一挡板和第二挡板之间形成用于容纳所述第一接线片(221)和第二接线片(231)的接线槽。
PCT/CN2023/100910 2022-07-04 2023-06-17 灭弧机构 WO2024007845A1 (zh)

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