WO2018205499A1 - 一种灭弧装置及使用该灭弧装置的断路器 - Google Patents

一种灭弧装置及使用该灭弧装置的断路器 Download PDF

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Publication number
WO2018205499A1
WO2018205499A1 PCT/CN2017/106388 CN2017106388W WO2018205499A1 WO 2018205499 A1 WO2018205499 A1 WO 2018205499A1 CN 2017106388 W CN2017106388 W CN 2017106388W WO 2018205499 A1 WO2018205499 A1 WO 2018205499A1
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Prior art keywords
arc extinguishing
arc
grid
extinguishing device
insulating
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PCT/CN2017/106388
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English (en)
French (fr)
Inventor
王海燕
朱志豪
袁端磊
赵芳帅
费翔
沙云鹏
卢留洋
左智华
徐铭辉
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平高集团有限公司
国家电网公司
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Application filed by 平高集团有限公司, 国家电网公司 filed Critical 平高集团有限公司
Publication of WO2018205499A1 publication Critical patent/WO2018205499A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—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
    • H01H9/362—Mounting of plates in arc chamber

Definitions

  • the invention relates to an arc extinguishing device and a circuit breaker using the same.
  • the arc extinguishing chamber uses an arc extinguishing grid to cut and lengthen the arc to increase the arc voltage.
  • the current state of the arc extinguishing grid is that if the height of the arc can be limited, it is not conducive to the loss of arc heat; if it is favorable for heat dissipation, it is not conducive to arc control and extinction. That is to say, the current arc-extinguishing grid cannot simultaneously achieve the technical effect of limiting the arc height and facilitating arc heat dissipation, so that the arc is quickly extinguished.
  • the present invention provides an arc extinguishing device capable of limiting the height of the arc while also facilitating heat dissipation from the arc; and the present invention also provides a circuit breaker using the arc extinguishing device.
  • an arc extinguishing device comprising at least two arc extinguishing grids arranged side by side in the longitudinal direction, wherein at least one of the at least two arc extinguishing grids has a larger dimension in a height direction than the arc extinguishing grid The size of the adjacent arc extinguishing grid on at least one side in the height direction.
  • each of the arc extinguishing grids is a metal grid.
  • each of the metal grids are flush.
  • the metal grid has a first sidewall and a second sidewall, and the first sidewall and the second sidewall form a V-shaped slit.
  • each of the arc extinguishing grids further includes an insulating grid, and the insulating grids are disposed above the metal grid in a height direction.
  • the outer side of the lower end of the insulating grid is chamfered.
  • the insulating grid includes two kinds of insulating grids; the upper end of the first insulating grid is flush to form a plane, and the upper end of the second insulating grid is higher than the plane.
  • the distance between the second insulating grids in the longitudinal direction is greater than the distance between the first insulating grids in the longitudinal direction.
  • the second insulating grid is provided with a protrusion in the width direction.
  • the arc extinguishing device further includes a casing, the casing includes a first side plate, a second side plate disposed opposite to the first side plate, a third side plate, and the first a fourth side plate and a bottom support plate disposed opposite to each other, the inner wall of the first side plate, the inner wall of the second side plate, and the bottom support plate are respectively provided with the arc-extinguishing grid Card slot.
  • an upper portion of the casing is provided with a sub-plate, and an upper end of the sub-plate is provided with an inwardly folded edge, and when installed, a lower surface of the flange and the upper portion of the protrusion Surface contact.
  • the housing further includes a pressing plate that fixes the arc extinguishing grid.
  • a lower surface of the protruding portion supports and cooperates with an upper surface of the pressing plate.
  • the technical solution of a circuit breaker disclosed by the present invention is: a break
  • the road device includes: a moving contact, a static contact, an arc extinguishing device, a static arcing guide and an arcing arc runner as described above, wherein the static pilot arc runner is electrically connected to the static contact,
  • the arcing guide is arranged corresponding to the movable contact.
  • the technical solution of the circuit breaker disclosed in the present invention is that the circuit breaker includes a moving contact, a static contact, the arc extinguishing device, the static arcing guide and the movable arc runner described above. .
  • the invention has the beneficial effects that: the size of the at least one arc-extinguishing grid such as the metal grid in the height direction is larger than the dimension of the arc-extinguishing grid of at least one of the adjacent ones in the height direction, such a structure is made to be broken
  • the arc introduced into the arc extinguishing device is rapidly elongated in the arc extinguishing grid, and is cut by the arc extinguishing grid to form a plurality of short arcs, and the arc extinguishing grid having a smaller size in the height direction can limit the arc.
  • the height is not too high, so that the arc is concentrated in the height range of the small arc-extinguishing grid, which is beneficial to the control and cutting of the arc, and the larger-sized arc-extinguishing grid is advantageous for the heat dissipation of the arc.
  • FIG. 1 is a schematic structural view of an embodiment of a circuit breaker according to the present invention.
  • FIG. 2 is a schematic structural view of an arc extinguishing device of the present invention.
  • FIG. 3 is a schematic view showing an arrangement structure of arc extinguishing grid sheets
  • FIG. 4 is a schematic structural view of a first arc extinguishing grid
  • Figure 5 is a schematic structural view of a second arc extinguishing grid
  • FIG. 6 is a schematic structural view of a third arc extinguishing grid
  • Figure 7 is a schematic view showing the structure of the housing of the arc extinguishing device.
  • the circuit breaker includes a movable contact 23, a static contact 22, a static pilot arc 13, an arcing guide 12, an arc extinguishing device 21, a closing mechanism 24, and a trip mechanism 25.
  • the arc extinguishing device 21 includes a housing and an arc chute disposed inside the housing.
  • the static pilot arc 13 is electrically connected to the stationary contact 22, and the movable pilot arc 12 is correspondingly disposed with the movable contact 23.
  • the arc chute includes a first arc chute 7 and a second arc chute 8 and a third arc chute 9.
  • Each of the arc extinguishing grid sheets includes an insulating grid at the upper end and a metal grid at the lower end.
  • Each of the metal grids has the same structure, wherein the lower ends of the metal grids have a front side wall 18 and a rear side wall 19. The front side wall 18 and the rear side wall 19 form a V-shaped gap.
  • the lower end of the insulating grid is provided with a slot for inserting the upper end of the metal grid.
  • a chamfer 20 is provided at the insertion end of the lower end of the insulating grid and the metal grid to facilitate the discharge of the inflation airflow inside the casing of the arc extinguishing device 21 from the upper end of the arc extinguishing device 21.
  • the first arc extinguishing grid 7 includes a first insulating grid 71 and a first metal grid 72; as shown in FIG. 5, the second arc extinguishing grid 8 includes a second insulating grid 81 and a The second metal grid 82; as shown in FIG. 6, the third arc extinguishing grid 9 includes a third insulating grid 91 and a third metal grid 92.
  • the difference between the first arc extinguishing grid 7, the second arc extinguishing grid 8 and the third arc extinguishing grid 9 is that the dimensions of the insulating grids in the height direction are different.
  • the dimension of the first arc extinguishing grid 7 in the height direction is equal to the dimension of the second arc extinguishing grid 8 in the height direction, and the dimension of the first arc extinguishing grid 7 in the height direction and the second arc extinguishing grid 8
  • the dimension in the height direction is smaller than the dimension of the third arc extinguishing grid 9 in the height direction.
  • the dimension of the second metal grid 82 in the height direction is the same as the dimension of the third metal grid 92 in the height direction, and the dimension of the second metal grid 82 in the height direction and the height of the third metal grid 92
  • the size of the direction is larger than the dimension of the first metal grid 72 in the height direction.
  • the dimension of the third insulating grid 91 in the height direction is larger than the dimension of the first insulating grid 71 in the height direction, and the dimension of the first insulating grid 71 in the height direction is larger than the height direction of the second insulating grid 81. size.
  • the lower ends of the metal grids are flush, the upper ends of the first insulating grids 71 and the second insulating grids 81 are flush, and the upper ends of the third insulating grids 91 are higher than the first and second insulating grids.
  • the function of the insulating grid is to block the passage of the arc current, when the arc is cut by the metal grid, the arc current is intercepted by the insulating grid, thereby hindering the escape of the arc and reducing the arcing distance.
  • the first arc chute sheet 7 and the second arc chute sheet 8 are arranged side by side in the longitudinal direction.
  • the number of the third arc extinguishing grid sheets 9 is smaller than the number of the first and second arc extinguishing grid sheets and is evenly spaced along the length direction. In the combination of the first arc chute piece 7 and the second arc chute piece 8 combined.
  • the lower ends of the first arc extinguishing grid 7, the second arc extinguishing grid 8 and the third arc extinguishing grid 9 are flush, the first arc extinguishing grid 7 and the second arc extinguishing grid
  • the upper end of 8 is flush to form a plane, and the upper end of the insulating grid 91 of the third arc extinguishing grid 9 is higher than the above plane.
  • the metal grids of the two arc extinguishing grids disposed in any adjacent three arc extinguishing grids are symmetrically arranged along the length direction based on the metal grid of the intermediate arc extinguishing grid so as to be metal in the length direction.
  • the upper end of the grid forms a wavy shape with a high and low staggered arrangement.
  • Such a structure not only limits the height of the arc but also contributes to the heat dissipation of the arc.
  • a small metal grid in the height direction can limit the arc. The effect of limiting the arc height is to prevent the arc area from being too large. Due to the instability of the arc, if the metal grid is too high, the arc root of the arc will be larger. The position of the arc root will diverge, and the magnetic field generated by the arc is inconsistent, which is not conducive to the control, elongation and extinction of the arc.
  • first one from left to right is the first arc chute 7 and the last one is the second arc chute 8, the tenth, the twentieth, the thirtieth, the fortieth and The fiftyth is the third arc-extinguishing grid 9, and a third arc-extinguishing grid is disposed every nine first and second arc-extinguishing grids.
  • the upper end of the third insulating grid 91 extends beyond the above plane, so as to be capable of separating the hot gas and the arc residue twice, further reducing the arcing distance, and because the number of the third insulating grid is small, the intermediate interval gas
  • the gap is large and the obstruction to the airflow is small, which is beneficial to the flow of hot air and arc residue.
  • the housing of the arc extinguishing device 21 is made of an insulating material. As shown in FIGS. 2 and 7, the housing includes a left side panel 2, a right side panel 1, a front side panel 3, a rear side panel 4, and a lower support panel.
  • the front side panel 3 and the rear side panel 4 each include an upper end sub-plate and a card slot board 5, 6 provided at a lower end of the sub-board.
  • the card slot plates 5, 6 are provided with first card slots for inserting the front and rear ends of the arc extinguishing grids.
  • the lower support plate includes a lower front support plate 14 and a lower rear support plate 15.
  • the upper surface of the lower front support plate 14 is provided with a second card slot for inserting the lower end of the front side wall 18 of the corresponding arc extinguishing grid.
  • a third card slot for inserting the lower end of the rear side wall 19 of the corresponding arc extinguishing grid is provided on the upper surface of the lower rear support plate 15.
  • the first card slot, the second card slot and the third card slot constitute a card slot for inserting the arcing grid.
  • the housing also includes pressure plates 10, 11 for pressing the upper end of the arc chute to secure the arc chute.
  • the upper end of the sub-plate has a folded edge that is folded inward.
  • the insulating grid 91 of the third arc extinguishing grid 9 sequentially includes an upper insulating grid, an intermediate insulating grid, and a lower insulating grid in the height direction.
  • the dimension of the upper insulating grid in the width direction is larger than the dimension of the lower insulating grid in the width direction, and the dimension of the lower insulating grid in the width direction is larger than the dimension of the intermediate insulating grid in the width direction.
  • the upper insulating grid forms a projection in the width direction with respect to the intermediate insulating grid and/or the lower insulating grid.
  • the lower surface of the protrusion is for supporting the upper surface of the pressure plate 10, 11, and the upper surface of the protrusion is in contact with the lower surface of the flange, that is, the protrusion is engaged with the flange and the pressure plates 10, 11 in the height direction. Fix it in the slot.
  • the static pilot arc 13 and the movable pilot arc 12 are both L-shaped plate structures, including horizontal plates and vertical plates.
  • the inner wall of the left side plate 2 and the right side plate 1 is provided with a vertical plate mounting groove 16 for the vertical plate installation, and the lower ends of the left and right side plates are provided for the horizontal plate to be snap-fitted to be electrically connected with the corresponding contacts.
  • the arc extinguishing device may not include the housing, may be used as a stand-alone product, or may be loaded into another housing as a unit; the first arc-extinguishing grid, the second extinguishing The number of the arc grid and the third arc extinguishing grid may be adjusted according to actual needs; or the metal grid of only one arc extinguishing grid is higher than the metal of the arc extinguishing grid on the adjacent side or adjacent sides thereof
  • the grid; the first arc-extinguishing grid and the second arc-extinguishing grid may also be disposed at uneven intervals; the third insulating grid may also be disposed at uneven intervals; the arc-extinguishing grid may also include only the metal grid instead of The insulating grid is included; the metal grid of the lower end of each arc extinguishing grid may not be flush; or the high insulating grid may not be disposed, and the upper ends of the insulating grid
  • An embodiment of an arc extinguishing device is the same as the embodiment of the arc extinguishing device in each embodiment of the above circuit breaker, and details are not described herein again.

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

本发明涉及一种灭弧装置及使用该灭弧装置的断路器。该灭弧装置包括沿长度方向并列间隔设置的至少两个灭弧栅片，至少一个所述灭弧栅片的沿高度方向的尺寸大于其相邻的至少一侧的灭弧栅片沿高度方向的尺寸。这样的结构使由断路器中引至灭弧装置中的电弧在灭弧栅片中迅速被拉长，并被灭弧栅片切割形成多个短电弧，沿高度方向尺寸较小的灭弧栅片可以限制电弧的高度不会太高，使电弧集中在较小灭弧栅片的高度范围内，进而有利于电弧的控制和切割，尺寸较大的金属栅片有利于电弧的散热。

Description

一种灭弧装置及使用该灭弧装置的断路器
相关申请的交叉引用
本申请基于申请号为201710326640.5、申请日为2017年05月10日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以全文引入的方式引入本申请。
技术领域
本发明涉及一种灭弧装置及使用该灭弧装置的断路器。
背景技术
对于直流断路器，由于直流电流没有自然过零点，只能通过提高电弧电压的方式强制电流下降过零或人为制造过零点，从而导致直流电弧的熄灭比交流电弧困难的多。通常，在直流开关设备中，灭弧室采用灭弧栅片切割、拉长电弧的方法提高电弧电压。当直流开关开断时通过气流场、磁场等作用力使电弧向灭弧室运动，使得电弧在灭弧室内被灭弧栅片切割拉长，以达到熄灭电弧的目的。然而，现有技术的灭弧栅片的现状是：如果可以限制电弧的高度，就不利于电弧热量的散失；如果有利于散热，就不利于电弧的控制和熄灭。也就是说，目前的灭弧栅片并不能同时实现限制电弧高度和有利于电弧散热的技术效果，以使电弧快速熄灭。
发明内容
为此，本发明提供了一种能够限制电弧的高度同时还有利于电弧散热的灭弧装置；同时本发明还提供了一种使用该灭弧装置的断路器。
在一个实施例中，本发明公开的一种灭弧装置的技术方案是：一种灭 弧装置，所述灭弧装置包括沿长度方向并列间隔设置的至少两个灭弧栅片，其中，所述至少两个灭弧栅片中的至少一个灭弧栅片沿高度方向的尺寸大于其相邻的至少一侧的灭弧栅片沿高度方向的尺寸。
作为一种实现方式，各所述灭弧栅片为金属栅片。
作为一种实现方式，各所述金属栅片的下端平齐。
作为一种实现方式，所述金属栅片具有第一侧壁和第二侧壁，所述第一侧壁和所述第二侧壁构成V形豁口。
作为一种实现方式，各所述灭弧栅片还包括绝缘栅片，所述绝缘栅片沿高度方向对应设置在所述金属栅片的上方。
作为一种实现方式，所述绝缘栅片的下端外侧设有倒角。
作为一种实现方式，所述绝缘栅片包括两种绝缘栅片；第一种绝缘栅片的上端平齐以形成平面，第二种绝缘栅片的上端高于所述平面。
作为一种实现方式，所述第二种绝缘栅片之间的沿纵向方向的间隔距离大于所述第一种绝缘栅片之间的沿纵向方向的间隔距离。
作为一种实现方式，所述第二绝缘栅片沿宽度方向设置有突出部。
作为一种实现方式，所述灭弧装置还包括壳体，所述壳体包括第一侧板、与所述第一侧板相对设置的第二侧板、第三侧板、与所述第三侧板相对设置的第四侧板以及底部支撑板，所述第一侧板的内壁、所述第二侧板的内壁及所述底部支撑板均设置有供所述灭弧栅片插装的卡槽。
作为一种实现方式，所述壳体的上部分设置有副板，所述副板的上端设置有向内的折边，当安装时，所述折边的下表面与所述突出部的上表面接触。
作为一种实现方式，所述壳体还包括固定所述灭弧栅片的压板，当安装时，所述突出部的下表面与所述压板的上表面支撑配合。
在另一个实施例中，本发明公开的一种断路器的技术方案是：一种断 路器，包括：动触头、静触头、上文所述的灭弧装置、静引弧道和动引弧道，其中，所述静引弧道与所述静触头电气连接，所述动引弧道与所述动触头对应设置。
在另一个实施例中，本发明公开的一种断路器的技术方案是，该断路器包括动触头、静触头、上文所述的灭弧装置、静引弧道和动引弧道。
本发明的有益效果是：至少一个灭弧栅片如金属栅片的沿高度方向上的尺寸大于其相邻的至少一侧的灭弧栅片的沿高度方向的尺寸，这样的结构使由断路器中引至灭弧装置中的电弧在灭弧栅片中迅速被拉长，并被灭弧栅片切割形成多个短电弧，沿高度方向上尺寸较小的灭弧栅片可以限制电弧的高度不会太高，使电弧集中在较小灭弧栅片的高度范围内，进而有利于电弧的控制和切割，尺寸较大的灭弧栅片有利于电弧的散热。
附图说明
图1为本发明的一种断路器的一个实施例的结构示意图；
图2为本发明的灭弧装置的结构示意图；
图3为灭弧栅片的排列结构示意图；
图4为第一灭弧栅片的结构示意图；
图5为第二灭弧栅片的结构示意图；
图6为第三灭弧栅片的结构示意图；
图7为灭弧装置的壳体的结构示意图。
具体实施方式
下面结合附图对本发明的实施方式作进一步说明。在此，应当指出，在本发明中，方向术语“上”、“下”是参考灭弧装置的高度方向所说明的，方向术语“前”、“后”是参考灭弧装置的宽度方向所说明的，方向术语“左”、“右”是参考灭弧装置的长度方向所说明的。
参见图1，示出了本发明的一种断路器的一个实施例的结构示意图。该断路器包括动触头23、静触头22、静引弧道13、动引弧道12、灭弧装置21、合闸机构24和分闸机构25。灭弧装置21包括壳体和设置于壳体内部的灭弧栅片。静引弧道13与静触头22电气连接，动引弧道12与动触头23对应设置。灭弧栅片包括第一灭弧栅片7和第二灭弧栅片8和第三灭弧栅片9。各灭弧栅片均包括上端的绝缘栅片和下端的金属栅片。各金属栅片的结构相同，其中各金属栅片的下端具有前侧壁18和后侧壁19。前侧壁18和后侧壁19形成V形豁口。绝缘栅片的下端设有插槽，该插槽用于供金属栅片的上端插入。参见图3，绝缘栅片的下端外侧与金属栅片的插接处设有倒角20，方便引导灭弧装置21的壳体内部的膨胀气流从灭弧装置21的上端排出。
如图4所示，第一灭弧栅片7包括第一绝缘栅片71和第一金属栅片72；如图5所示，第二灭弧栅片8包括第二绝缘栅片81和第二金属栅片82；如图6所示，第三灭弧栅片9包括第三绝缘栅片91和第三金属栅片92。第一灭弧栅片7、第二灭弧栅片8和第三灭弧栅片9的区别在于：各绝缘栅片的高度方向上的尺寸不同。第一灭弧栅片7的沿高度方向的尺寸等于第二灭弧栅片8的沿高度方向的尺寸，并且第一灭弧栅片7的沿高度方向的尺寸和第二灭弧栅片8的沿高度方向的尺寸均小于第三灭弧栅片9的沿高度方向的尺寸。第二金属栅片82的沿高度方向的尺寸和第三金属栅片92的沿高度方向的尺寸相同，并且第二金属栅片82的沿高度方向的尺寸和第三金属栅片92的沿高度方向的尺寸均大于第一金属栅片72的沿高度方向的尺寸。第三绝缘栅片91的沿高度方向的尺寸大于第一绝缘栅片71的沿高度方向的尺寸，第一绝缘栅片71的沿高度方向的尺寸大于第二绝缘栅片81的沿高度方向的尺寸。各金属栅片的下端平齐，第一绝缘栅片71和第二绝缘栅片81的上端平齐，第三绝缘栅片91的上端高于第一、第二绝缘栅片 的上端。即，第一绝缘栅片71和第二绝缘栅片81形成低绝缘栅片，第三绝缘栅片91形成高绝缘栅片。由于绝缘栅片的作用是阻碍电弧电流的通过，所以当电弧被金属栅片切割上升后，电弧电流被绝缘栅片截断，进而阻碍电弧的逸出，降低飞弧距离。
第一灭弧栅片7和第二灭弧栅片8沿长度方向并列间隔设置，第三灭弧栅片9的数量小于第一、第二灭弧栅片的数量并沿长度方向均匀间隔设置于第一灭弧栅片7和第二灭弧栅片8组合后的组合体中。在最终的灭弧装置中，第一灭弧栅片7、第二灭弧栅片8和第三灭弧栅片9的下端平齐，第一灭弧栅片7和第二灭弧栅片8的上端平齐形成一个平面，第三灭弧栅片9的绝缘栅片91的上端高出上述平面。并且，任意相邻的三个灭弧栅片中相隔设置的两个灭弧栅片的金属栅片基于中间灭弧栅片的金属栅片而沿长度方向对称布置，以便在长度方向上各金属栅片的上端形成高低错落设置的波浪形形状。这样的结构不仅能够限制电弧的高度，还有利于电弧的散热。高度方向上尺寸较小的金属栅片可以限制电弧，限制电弧高度的作用是防止电弧区域过大，由于电弧的不稳定性，如果金属栅片过高会导致电弧的弧根存在的区域较大，弧根位置会发散，电弧产生的磁场不一致，不利于电弧的控制、拉长和熄灭。
本实施例中，优选地，一共有30个第一灭弧栅片7、25个第二灭弧栅片8和5个第三灭弧栅片9。在排列时，从左至右第一个为第一灭弧栅片7，最后一个为第二灭弧栅片8，第十个、第二十个、第三十个、第四十个以及第五十个均为第三灭弧栅片9，每间隔9个第一、第二灭弧栅片设置一个第三灭弧栅片。第三绝缘栅片91的上端超出上述平面，作用是既能够将喷出的热气体和电弧残留物二次隔离，进一步降低飞弧距离，又因为第三绝缘栅片数量少，中间间隔的气隙大，对气流的阻碍小，有利于热气流和电弧残余物的飞出。
灭弧装置21的壳体由绝缘材料制成的。如图2和图7所示，壳体包括左侧板2、右侧板1、前侧板3、后侧板4和下支撑板。前侧板3和后侧板4均包括上端的副板和设于副板下端的卡槽板5、6。卡槽板5、6上设有用于供上述各灭弧栅片的前、后端对应插装的第一卡槽。下支撑板包括下前支撑板14和下后支撑板15。下前支撑板14的上表面上设有用于供相应的灭弧栅片的前侧壁18下端插装的第二卡槽。下后支撑板15的上表面上设有用于供相应的灭弧栅片的后侧壁19下端插装的第三卡槽。第一卡槽、第二卡槽和第三卡槽构成用于供灭弧栅片插装的卡槽。壳体还包括用于压紧灭弧栅片上端以固定灭弧栅片的压板10、11。另外，副板的上端具有向内翻折的折边。第三灭弧栅片9的绝缘栅片91沿高度方向依次包括上部绝缘栅片、中间绝缘栅片和下部绝缘栅片。上部绝缘栅片沿宽度方向的尺寸大于下部绝缘栅片沿宽度方向的尺寸，而下部绝缘栅片沿宽度方向的尺寸大于中间绝缘栅片沿宽度方向的尺寸。由此，上部绝缘栅片相对于中间绝缘栅片和/或下部绝缘栅片形成沿宽度方向的突出部。突出部的下表面用于与压板10、11的上表面支撑配合，突出部的上表面与折边的下表面接触，即突出部卡合在折边与压板10、11在高度方向上构成的槽中以进行固定。静引弧道13和动引弧道12均为L形板结构，包括横板和竖板。左侧板2和右侧板1的内壁上设有用于供竖板安装的竖板安装槽16，左、右侧板的下端设有用于供横板吻合卡装以与相应的触头电气连接的横板安装槽17。
在本发明的其他实施例中，灭弧装置也可以不包括壳体，可以作为一个独立产品使用，也可以作为一个单元装入到其他的壳体中；第一灭弧栅片、第二灭弧栅片以及第三灭弧栅片的数量可根据实际需要进行调整；也可以只有一个灭弧栅片的金属栅片高于其相邻一侧或者相邻两侧的灭弧栅片的金属栅片；第一灭弧栅片和第二灭弧栅片也可以不均匀间隔设置；第三绝缘栅片也可以不均匀间隔设置；灭弧栅片也可以只包括金属栅片而不 包括绝缘栅片；各灭弧栅片的下端的金属栅片也可以不齐平；也可以不设置高绝缘栅片，此时各灭弧栅片的上端的绝缘栅片上端齐平。
一种灭弧装置的实施例与上述一种断路器的各实施例中的灭弧装置的实施例相同，此处不再赘述。
虽然说明书包含许多具体的实施细节，但是这些实施细节不应当被解释为对任何本发明的范围的限定，而是对专用于特定实施方式的特征的描述。在不脱离本发明的精神和原理的情况下，对本发明的任何修改和变型均应视为落入在本发明的保护范围内。

Claims (13)

  1. 一种灭弧装置，所述灭弧装置包括沿长度方向并列间隔设置的至少两个灭弧栅片，其中，所述至少两个灭弧栅片中的至少一个灭弧栅片沿高度方向的尺寸大于其相邻的至少一侧的灭弧栅片沿高度方向的尺寸。
  2. 根据权利要求1所述的灭弧装置，其中，各所述灭弧栅片为金属栅片。
  3. 根据权利要求2所述的灭弧装置，其中，各所述金属栅片的下端平齐。
  4. 根据权利要求2所述的灭弧装置，其中，所述金属栅片具有第一侧壁和第二侧壁，所述第一侧壁和所述第二侧壁构成V形豁口。
  5. 根据权利要求3所述的灭弧装置，其中，各所述灭弧栅片还包括绝缘栅片，所述绝缘栅片沿高度方向对应设置在所述金属栅片的上方。
  6. 根据权利要求5所述的灭弧装置，其中，所述绝缘栅片的下端外侧设有倒角。
  7. 根据权利要求6所述的灭弧装置，其中，所述绝缘栅片包括两种绝缘栅片；第一种绝缘栅片的上端平齐以形成平面，第二种绝缘栅片的上端高于所述平面。
  8. 根据权利要求7所述的灭弧装置，其中，所述第二种绝缘栅片之间的沿纵向方向的间隔距离大于所述第一种绝缘栅片之间的沿纵向方向的间隔距离。
  9. 根据权利要求7或8所述的灭弧装置，其中，所述第二绝缘栅片沿宽度方向设置有突出部。
  10. 根据权利要求9所述的灭弧装置，其中，所述灭弧装置还包括壳体，所述壳体包括第一侧板、与所述第一侧板相对设置的第二侧板、第三侧板、与所述第三侧板相对设置的第四侧板以及底部支撑板，所述第一侧 板的内壁、所述第二侧板的内壁及所述底部支撑板均设置有供所述灭弧栅片插装的卡槽。
  11. 根据权利要求10所述的灭弧装置，其中，所述壳体的上部分设置有副板，所述副板的上端设置有向内的折边，当安装时，所述折边的下表面与所述突出部的上表面接触。
  12. 根据权利要求11所述的灭弧装置，其中，所述壳体还包括固定所述灭弧栅片的压板，当安装时，所述突出部的下表面与所述压板的上表面支撑配合。
  13. 一种断路器，所述断路器包括动触头、静触头、权利要求1至12任一项所述的灭弧装置、静引弧道和动引弧道，其中，所述静引弧道与所述静触头电气连接，所述动引弧道与所述动触头对应设置。
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