阅读说明：本技术 一种断路器灭弧室 (Arc extinguish chamber of circuit breaker ) 是由 南寅 黄平安 郑海 单保卫 王靖 谢顺亮 苏文冉 高会强 张玉霖 于 2019-08-29 设计创作，主要内容包括：本发明公开一种断路器灭弧室(100),包括绝缘外壳(140)和设于所述绝缘外壳(140)内的第一灭弧栅片(110)和第二灭弧栅片(120),其特征在于,在所述第一灭弧栅片(110)和所述第二灭弧栅片(120)的中部区域分别对应设有整体向内凹陷的第一曲面(111)和第二曲面(121),所述第一曲面(111)和第二曲面(121)相互高低交错设置,在所述第一曲面(111)和第二曲面(121)上分别对应设有至少一个高度相同的矫弧点。本发明的灭弧室结构通过对电弧弧道的预设,在电弧产生后,通过弧道的长短差异,将电弧限制在最短弧道上,从而获得更好的灭弧效果。(The invention discloses an arc extinguish chamber (100) of a circuit breaker, which comprises an insulating shell (140) and a first arc extinguish grid sheet (110) and a second arc extinguish grid sheet (120) which are arranged in the insulating shell (140), and is characterized in that a first curved surface (111) and a second curved surface (121) which are integrally and inwards recessed are correspondingly arranged in the middle areas of the first arc extinguish grid sheet (110) and the second arc extinguish grid sheet (120) respectively, the first curved surface (111) and the second curved surface (121) are arranged in a staggered mode in height, and at least one arc straightening point with the same height is correspondingly arranged on the first curved surface (111) and the second curved surface (121) respectively. The arc extinguishing chamber structure of the invention limits the electric arc on the shortest arc path through the length difference of the arc path after the electric arc is generated through presetting the arc path, thereby obtaining better arc extinguishing effect.)

1. The utility model provides a circuit breaker explosion chamber (100), includes insulating casing (140) and locates first arc extinguishing bars piece (110) and second arc extinguishing bars piece (120) in insulating casing (140), its characterized in that first arc extinguishing bars piece (110) with the middle part region of second arc extinguishing bars piece (120) corresponds respectively and is equipped with whole inside sunken first curved surface (111) and second curved surface (121), crisscross setting of first curved surface (111) and second curved surface (121) each other height correspond respectively on first curved surface (111) and second curved surface (121) and be equipped with at least one highly the same arc correction point.

2. The circuit breaker arc chute (100) according to claim 1, characterized in that said first curved surface (111) or second curved surface (121) respectively comprise at least one circular arc surface.

3. The arc chute (100) of a circuit breaker according to claim 2, characterized in that said arc surface is a convex or concave arc.

4. The arc chute (100) of a circuit breaker according to claim 1, characterized in that three points of the same height are respectively provided on said first curved surface (111) and on said second curved surface (121).

5. The arc chute (100) of a circuit breaker according to claim 1, characterized in that at least a first arc chute (110) and at least a second arc chute (120) are arranged in sequence or alternately.

6. The arc chute (100) of a circuit breaker according to claim 1, characterized in that said arc chute (100) comprises a plurality of arc chute blades, the distance of adjacent arc chute blades being the same or different.

7. The arc chute (100) of the circuit breaker according to claim 1, further comprising an arc striking plate (130), wherein the arc striking plate (130) is disposed on one side of the arc chute (100), and a warp bent in a direction close to the first arc chute (110) and the second arc chute (120) is disposed at one end of the arc striking plate (130).

8. The arc chute (100) of a circuit breaker according to claim 1 or 6, characterized in that adjacent arc chute pieces are insulated from each other.

9. The circuit breaker arc chute (100) as claimed in claim 1, characterized in that the insulating housing (140) comprises an insulating wall (141) and an insulating cover plate (142), the insulating wall (141) and the insulating cover plate (142) being fixed by means of fasteners (143).

Technical Field

The application belongs to the technical field of low-voltage apparatus, concretely relates to explosion chamber of circuit breaker.

Background

The arc extinguishing chamber of the low-voltage circuit breaker generally uses ferromagnetic materials as basic materials of the arc extinguishing grid, when breaking current, a magnetic field generated by electric arc tends to extend to the arc extinguishing grid with better magnetic conductivity near the ferromagnetic materials, so that an inhalation effect is generated to the electric arc in the direction of the arc extinguishing grid, besides the arc blowing magnetic field generated by the electric arc, the inhalation effect causes the internal movement of the arc extinguishing grid of the arc phase, due to the influence of the current magnetic field between adjacent poles, the electric arc always deviates in the arc extinguishing chamber, namely, the electric arc always moves to the position of the side wall of the arc extinguishing chamber, and can not well stay at the middle position of the arc extinguishing chamber, which causes serious ablation of the arc extinguishing chamber, can cause switch burning loss under extreme conditions, and current breaking failure. In summary, the technical problem to be solved by the present invention is to provide a novel arc extinguishing chamber structure, wherein an arc is limited on the shortest arc path by presetting an arc path and the length difference of the arc path after the arc is generated, so as to obtain a better arc extinguishing effect.

Disclosure of Invention

Against this background, in order to overcome the above-mentioned drawbacks of the prior art, the object of the present invention is to provide a structural feature that makes use of the attraction effect of the ferromagnetic material in the arc extinguishing chamber on the electric arc, so that the path of the electric arc in the arc extinguishing chamber is artificially rectified to the path intended by the design.

The specific technical scheme of the invention is as follows:

the utility model provides a circuit breaker explosion chamber, includes insulating casing and locates first arc extinguishing bars piece of insulating casing and second arc extinguishing bars piece first arc extinguishing bars piece with the middle part region of second arc extinguishing bars piece corresponds respectively and is equipped with whole inside sunken first curved surface and second curved surface, the crisscross setting of first curved surface and second curved surface height each other correspond respectively on first curved surface and the second curved surface and be equipped with at least one highly the same point.

Preferably, the first curved surface or the second curved surface respectively includes at least one arc surface.

Preferably, the arc surface is a convex arc or a concave arc.

Preferably, three points with the same height are correspondingly arranged on the first curved surface and the second curved surface respectively.

Preferably, the at least one first arc chute plate and the at least one second arc chute plate are arranged in sequence or alternately.

Preferably, the arc extinguishing chamber comprises a plurality of arc extinguishing bars, and the distances between the adjacent arc extinguishing bars are the same or different.

Preferably, the explosion chamber still includes the striking piece, the striking piece is located one side of explosion chamber the one end of striking piece is equipped with to being close to first arc extinguishing bars piece with the warpage that second arc extinguishing bars piece direction was bent.

Preferably, adjacent arc chute pieces are insulated from each other.

Preferably, the insulation housing comprises an insulation wall and an insulation cover plate, and the insulation wall and the insulation cover plate are fixed through a fastener.

Borrow by above technical scheme, the beneficial effect of this application lies in:

1) the trend of the electric arc is controlled by controlling the distance between key points in the arc extinguishing system.

2) The aim of rapidly extinguishing the electric arc is achieved by driving the electric arc into the arc extinguishing chamber.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:

fig. 1 is a schematic view of the overall structure of an arc extinguishing chamber of the circuit breaker of the present invention.

Fig. 2 is a schematic view of the structure of a first arc chute of an arc chute of the circuit breaker of the present invention.

Fig. 3 is a schematic view of the structure of a second arc chute of the circuit breaker of the present invention.

Fig. 4 is a schematic diagram of the first arc chute sheet and the second arc chute sheet of the arc chute of the circuit breaker.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The following references to "middle" and "height" are based on the angle shown in fig. 4, it should be noted that the above positions are only used for the clarity of the description of the technical solution, and should not be construed as a limitation of the present invention.

As shown in fig. 1, the present embodiment discloses an arc chute 100 of a circuit breaker, the arc chute 100 includes an insulating housing 140, a first arc chute 110, a second arc chute 120, and an arc striking plate 130, the first arc chute 110, the second arc chute 120, and the arc striking plate 130 are disposed in the insulating housing 140, the insulating housing 140 includes an insulating wall 141 and an insulating cover plate 142, the insulating wall 141 and the insulating cover plate 142 are detachably fixed together by a fastening member 143, and in the present embodiment, the fastening member 143 is a screw.

Referring to fig. 2 to 4, a first curved surface 111 which is recessed inwards as a whole is disposed in a middle region of the first arc-extinguishing grid piece 110, the first curved surface 111 includes arc surfaces 111-a, 111-b, 111-c, 112-a and 112-b, the arc surfaces 111-a, 111-b and 111-c are convex arcs, the arc surfaces 112-a and 112-b are concave arcs, the arc surface 112-a is disposed between the arc surface 111-a and the arc surface 111-b, and the arc surface 112-b is disposed between the arc surface 111-b and the arc surface 111-c.

The middle region of the second arc chute 120 is provided with a second curved surface 121 which is integrally recessed, the second curved surface 121 comprises an arc surface 121-a, an arc surface 121-b, an arc surface 121-c, an arc surface 121-d, an arc surface 122-a, an arc surface 122-b and an arc surface 122-c, wherein the arc surface 121-a, the arc surface 121-b, the arc surface 121-c and the arc surface 121-d are convex arcs, the arc surface 122-a, the arc surface 122-b and the arc surface 122-c are concave arcs, the arc surface 122-a is located between the arc surface 121-a and the arc surface 121-b, the arc surface 122-b is located between the arc surface 121-b and the arc surface 121-c, the arc surface 122-c is located between the arc surface 121-c and the arc surface 121-d. Of course, the first curved surface 111 and the second curved surface 121 may also be line segments or a combination of the line segments and the line segments, besides the circular arcs, the number of the circular arcs and/or the line segments may be one or more, and in this embodiment, the first curved surface 111 and the second curved surface 121 are composed of a plurality of circular arcs with different shapes.

Referring to fig. 4, the first arc chute 110 and the second arc chute 120 have different profiles, the second curved surface 121 and the first curved surface 111 have different shapes, the second curved surface 121 and the first curved surface 111 are staggered in height, the first curved surface 111 has three points A, B and C, the second curved surface 121 has three arc correction points a, B and C, the arc correction point a corresponds to the arc correction point a and has the same height, the arc correction point B corresponds to the arc correction point B and has the same height, and the point arc correction point C corresponds to the arc correction point C and has the same height, that is: the first curved surface 111 is provided with three different positions corresponding to the three different positions on the second curved surface 121, and the heights of the three corresponding positions are equal. When an electric arc generated in the circuit breaker when a contact system is disconnected enters the arc extinguish chamber 100, the distance between the positions with the same corresponding height of the first curved surface 111 and the second curved surface 121 is shortest compared with the distance between the other corresponding positions on the first curved surface 111 and the second curved surface 121, and the arc resistance between the positions with the same corresponding height of the first curved surface 111 and the second curved surface 121 is smallest. Of course, the number of the arc-straightening points arranged on the first curved surface 111 and the second curved surface 121 may be 1, or may also be multiple, such as two, three, four, five, etc., without limitation, and in this embodiment, the number of the arc-straightening points is 3.

The first arc chute 110 and the second arc chute 120 may be alternatively arranged or sequentially arranged in the arc chute 100, that is: one or more first arc-extinguishing grid pieces 110 and one or more second arc-extinguishing grid pieces 120 can be arranged alternately, for example, two first arc-extinguishing grid pieces 110 and two second arc-extinguishing grid pieces 120 can be arranged alternately, or a plurality of second arc-extinguishing grid pieces 120 can be arranged in sequence after a plurality of first arc-extinguishing grid pieces 110 are arranged, and the same technical effect can be achieved. In addition, the adjacent arc-extinguishing grid plates are electrically insulated from each other, and the distances between the adjacent arc-extinguishing grid plates may be the same or different, which is not limited herein.

The arc striking plate 130 is disposed at one side of the arc extinguishing chamber 100, and a warping 131 bent in a direction close to the first arc chute 110 and the second arc chute 120 is disposed at one end of the arc striking plate 130, so that an arc generated when a contact system is broken can be introduced into the arc extinguishing chamber 100.

The arc extinguishing chamber of the invention ensures that when electric arc is generated between the arc extinguishing grid pieces, because a shortest arc path is artificially manufactured between the grid pieces, the electric arc is corrected and limited on the shortest arc path, thereby achieving the effect of correcting the electric arc and improving the arc extinguishing performance of the arc extinguishing chamber.

Practice proves that the arc extinguish chamber manufactured according to the technical scheme of the invention obtains better breaking effect and arc extinguish effect in the breaking test of the low-voltage circuit breaker, and ensures that the electrical service life and the breaking capacity of the frame circuit breaker meet the requirements of relevant standards.

The above is only one embodiment of the present invention, and those skilled in the art can make various changes or modifications to the embodiment of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.