阅读说明：本技术 一种用于高速断路器的灭弧罩 (Arc extinguishing chamber for high-speed circuit breaker ) 是由 卫平春 张国勇 宋安超 李富强 于 2020-06-01 设计创作，主要内容包括：本发明公开了一种用于高速断路器的灭弧罩,具体涉及灭弧罩技术领域,包括侧壳和背壳组成的灭弧罩外壳,所述灭弧罩外壳的内侧间距安装有灭弧栅片,所述背壳上开设有贯穿其且与两两灭弧栅片之间的间距错位分布的泄弧口,所述泄弧口从内至外成渐大的通槽且其靠近灭弧栅片的一侧为内侧,所述泄弧口的腔壁中套装有中空的散热套板,所述散热套板与泄弧口之间可拆卸安装。本发明,通过改变原有的泄弧口结构,在防止因泄弧口口径过大、在泄弧过程中回流严重导致断路器内充满杂质的同时,经泄弧口的小口径向大口径导出,进一步提高了热量导出的高效、充分性。(The invention discloses an arc extinguishing chamber for a high-speed circuit breaker, and particularly relates to the technical field of arc extinguishing chambers, which comprises an arc extinguishing chamber shell consisting of a side shell and a back shell, wherein arc extinguishing grid pieces are arranged on the inner side of the arc extinguishing chamber shell at intervals, arc discharge ports which penetrate through the back shell and are distributed with the intervals between every two arc extinguishing grid pieces in a staggered manner are formed in the back shell, the arc discharge ports form gradually-enlarged through grooves from inside to outside, one side of each arc discharge port, which is close to each arc extinguishing grid piece, is the inner side, a hollow heat dissipation sleeve plate is sleeved in the cavity wall of each arc discharge port, and the heat dissipation sleeve plate and the arc discharge ports are detachably arranged. According to the invention, through changing the original arc discharge port structure, impurities are prevented from being filled in the circuit breaker due to overlarge caliber of the arc discharge port and serious backflow in the arc discharge process, and meanwhile, the impurities are led out through the small-opening radial large caliber of the arc discharge port, so that the high efficiency and the sufficiency of heat lead-out are further improved.)

1. The utility model provides an arc-extinguishing chamber for high-speed circuit breaker, includes the arc-extinguishing chamber shell that side shell and backshell are constituteed, arc extinguishing bars piece is installed to the inboard interval of arc-extinguishing chamber shell, characterized in that: set up on the backshell run through it and with two liang of arc extinguishing bars interval dislocation distribution's the arc mouth that leaks, it is inboard to become the logical groove that grows gradually and its one side that is close to the arc extinguishing bars piece from inside to outside to leak the arc mouth, it is different and dislocation, equipartition on the backshell to leak the arc mouth size.

2. The arc chute for a high speed circuit breaker of claim 1 wherein: the cavity wall of the arc discharge port is sleeved with a hollow heat dissipation sleeve plate, and the heat dissipation sleeve plate and the arc discharge port are detachably mounted.

3. The arc chute for a high speed circuit breaker of claim 2 wherein: and a clamping groove and a clamping rod which are connected with each other are arranged between the opposite surfaces of the heat dissipation sleeve plate and the arc discharge opening, and the clamping rod is clamped in the clamping groove when the heat dissipation sleeve plate is arranged in the inner cavity of the arc discharge opening.

4. The arc chute for a high speed circuit breaker of claim 1 wherein: and an upper stretching plate capable of being elastically stretched is arranged at the joint of the arc extinguishing grid plate and the arc extinguishing cover shell.

5. The arc chute for a high speed circuit breaker of claim 4 wherein: the junction of arc extinguishing bars piece and arc extinguishing chamber shell is equipped with and is located the arc extinguishing chamber shell, makes the relative regulation clearance that the arc extinguishing chamber shell removed of arc extinguishing bars piece, sets up the fixed slot that link up its and arc extinguishing bars piece on the arc extinguishing chamber shell, be equipped with the spacing pole of wearing of fixed position in the arc extinguishing chamber shell to the arc extinguishing bars piece in the fixed slot.

6. The arc chute for a high speed circuit breaker of claim 5 wherein: every two limiting penetrating rods are connected through a connecting rod or a connecting plate, and a through hole penetrating through the connecting plate is formed in the connecting plate.

Technical Field

The present invention relates to the field of arc chutes, and more particularly, to an arc chute for a high speed circuit breaker.

Background

The high-speed circuit breaker mainly comprises a main circuit, a tripping device, a jointing device, an auxiliary contact and an arc-extinguishing cover, wherein the arc-extinguishing cover is a device for enabling an electric arc to be in contact with a solid medium, reducing the temperature of the electric arc and further accelerating the extinguishing of the electric arc.

When the arc extinguishing cover works, although the arc is cut off by the arc extinguishing grid pieces, the arc discharge port has the effect of certain heat discharge, but the heat of each section is inconsistent when the arc is cut off by the arc extinguishing grid pieces, the arc discharge port cannot guarantee that the heat is quickly and fully discharged, and the arc extinguishing performance of the arc extinguishing cover is poor.

Disclosure of Invention

In order to solve the technical problem, the invention provides an arc extinguishing chamber for a high-speed circuit breaker, which comprises an arc extinguishing chamber shell consisting of a side shell and a back shell, wherein arc extinguishing grid pieces are arranged on the inner side of the arc extinguishing chamber shell at intervals, arc discharge openings which penetrate through the back shell and are distributed with the intervals between every two arc extinguishing grid pieces in a staggered manner are formed in the back shell, the arc discharge openings form gradually larger through grooves from inside to outside, one side of the arc discharge openings, which is close to the arc extinguishing grid pieces, is the inner side, and the arc discharge openings are different in size, staggered and uniformly distributed on the back shell.

In a preferred embodiment, a hollow heat dissipation sleeve plate is sleeved in the cavity wall of the arc discharge port, and the heat dissipation sleeve plate and the arc discharge port are detachably mounted.

In a preferred embodiment, a clamping groove and a clamping rod which are connected with each other are arranged between the opposite surfaces of the heat dissipation sleeve plate and the arc discharge opening, and the clamping rod is clamped in the clamping groove when the heat dissipation sleeve plate is installed in the inner cavity of the arc discharge opening.

In a preferred embodiment, the connection between the arc chute plate and the arc chute housing is provided with an elastically stretchable upper stretching plate.

In a preferred embodiment, an adjusting gap is arranged at the joint of the arc-extinguishing grid plate and the arc-extinguishing chamber shell and used for enabling the arc-extinguishing grid plate to move relative to the arc-extinguishing chamber shell, a fixing groove penetrating through the arc-extinguishing chamber shell and the arc-extinguishing grid plate is formed in the arc-extinguishing chamber shell, and a limiting penetrating rod for fixing the position of the arc-extinguishing grid plate in the arc-extinguishing chamber shell is arranged in the fixing groove.

In a preferred embodiment, each two limiting penetrating rods are connected through a connecting rod or a connecting plate, and a through hole penetrating through the connecting plate is formed in the connecting plate.

Drawings

FIGS. 1-2 are schematic views of the overall structure of the present invention;

FIG. 3 is a schematic view of a partial cross-sectional structure of an arc relief port according to the present invention;

fig. 4 is a schematic view of an independent structure of the heat dissipation sleeve plate and the arc relief opening.

Description of reference numerals: 11 side shell, 12 back shell, 2 arc-extinguishing grid plate, 3 arc-discharging opening, 41 upper stretching plate, 42 adjusting gap, 51 fixing groove, 52 limiting penetrating rod, 531 connecting rod, 532 connecting plate, 61 heat-dissipating sleeve plate, 621 clamping groove and 622 clamping rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

An arc extinguishing chamber for a high-speed circuit breaker as shown in fig. 1-4, comprising an arc extinguishing chamber housing composed of a side shell 11 and a back shell 12, arc extinguishing grid pieces 2 are installed at the inner side of the arc extinguishing chamber housing at intervals, arc discharging ports 3 penetrating through the arc extinguishing chamber housing and distributed with intervals between every two arc extinguishing grid pieces 2 in a staggered manner are arranged on the back shell 12, the arc discharging ports 3 form gradually large through grooves from inside to outside, one side of the arc discharging ports close to the arc extinguishing grid pieces 2 is the inner side, the arc discharging ports 3 are different in size and staggered and uniformly distributed on the back shell 12, the arc discharging ports 3 can be channels composed of structures with different sizes, such as polygons with different sizes, circular arcs and the like from inside to outside, and are staggered and uniformly distributed on the back shell 12, in the working process of the arc extinguishing chamber, generated heat cannot be timely discharged from the arc extinguishing ports, and in the process of discharging heat through the arc discharging ports 3, the arc discharging ports 3 sequentially pass through the large aperture of the arc discharging ports 3, when preventing to lead to being full of impurity in the circuit breaker because of letting out the 3 bores oversizes of arc mouth, letting back flow seriously at the arc in-process of letting out, derive through the radial heavy-calibre of the small-bore of letting out arc mouth 3, further improved high efficiency, the sufficiency that the heat derived.

Let out the cavity wall of arc mouth 3 in the cover be equipped with hollow heat dissipation lagging 61, heat dissipation lagging 61 and let out demountable installation between the arc mouth 3, at the heat through letting out the in-process of arc mouth 3 exhaust, the heat strikes and lets out arc mouth 3 and can make its chamber wall and hollow space intensification, thereby directly reduce thermal derivation speed, through heat dissipation lagging 61, carry out effectual heat dissipation to the discharged heat, when making to let out arc mouth 3 possess certain thermal diffusivity, reduce the thermal influence, improve the high efficiency that the heat was derived.

The heat dissipation sleeve plate 61 and the opposite face of releasing the arc mouth 3 between be equipped with make the two draw-in groove 621, card pole 622 that link to each other, heat dissipation sleeve plate 61 installs when releasing the arc mouth 3 inner chamber, and card pole 622 clamps in draw-in groove 621, and the combined action of draw-in groove 621 and card pole 622 makes heat dissipation sleeve plate 61 release the arc mouth 3 relatively and possesses the dismouting nature, is convenient for change heat dissipation sleeve plate 61 immediately.

The connection part of the arc-extinguishing grid pieces 2 and the arc-extinguishing cover shell is provided with an upper stretching plate 41 which can be elastically stretched, heat impacts the arc-extinguishing grid pieces 2 in the arc-extinguishing process, and the arc-extinguishing grid pieces 2 press or stretch the upper stretching plate 41 to enable the upper stretching plate 41 to be slightly elastically deformed, so that the gap between every two arc-extinguishing grid pieces 2 is suitable for the channel requirements of different sections of heat impact; the joint of the arc-extinguishing grid pieces 2 and the arc-extinguishing cover shell is provided with an adjusting gap 42 which is positioned on the arc-extinguishing cover shell and enables the arc-extinguishing grid pieces 2 to move relative to the arc-extinguishing cover shell, the arc-extinguishing cover shell is provided with a fixing groove 51 which penetrates through the arc-extinguishing grid pieces and the arc-extinguishing grid pieces 2, the fixing groove 51 is internally provided with a limiting penetrating rod 52 which fixes the positions of the arc-extinguishing grid pieces 2 in the arc-extinguishing cover shell, when the arc-extinguishing cover is installed, the size of a gap between every two opposite surfaces of each two arc-extinguishing grid pieces 2 is adjusted according to the requirement of arc extinguishing work, and then the corresponding limiting penetrating rod 52 penetrates through the fixing groove 51 at the corresponding position to fix the positions of the arc; every two limiting penetrating rods 52 are connected through a connecting rod 531 or a connecting plate 532, through holes penetrating through the limiting penetrating rods are formed in the connecting plate 532, every two limiting penetrating rods 52 are connected, when the positions of the arc extinguishing grid pieces 2 in the arc extinguishing chamber shell are fixed, the limiting penetrating rods 52 are directly and integrally installed in the corresponding fixing grooves 51, and installation is more convenient.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.