CN211350551U - Arc isolation cover of circuit breaker - Google Patents
Arc isolation cover of circuit breaker Download PDFInfo
- Publication number
- CN211350551U CN211350551U CN202020287438.3U CN202020287438U CN211350551U CN 211350551 U CN211350551 U CN 211350551U CN 202020287438 U CN202020287438 U CN 202020287438U CN 211350551 U CN211350551 U CN 211350551U
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- arc
- protection box
- piece
- cooling protection
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses an arc-isolating cover of circuit breaker, including the circuit breaker, be provided with moving contact and static contact in the circuit breaker, the circuit breaker upper surface is located fixed mounting and has the cooling protecting box, and the inside top surface of circuit breaker has U type cover at static contact adjacent position fixed mounting, side surface parallel mounting has the multiunit arc extinguishing piece in the U type cover, cooling protecting box one end is provided with the opening, and the inside multiunit flame extinguishing piece that evenly is provided with of cooling protecting box. The utility model discloses a set up cooling protection box on the circuit breaker, when moving contact and static contact separation produced electric arc, electric arc can be drawn forth to cooling protection box through the effect of arc extinguishing piece and protruding piece, and electric arc and the high temperature of production can eliminate electric arc and make it extinguish through the multiunit flame extinguishing piece in the cooling protection box, and can carry out the heat exchange to high temperature, have reduced the temperature that heat energy came out from the opening of cooling protection box, have improved the security.
Description
Technical Field
The utility model relates to a circuit breaker technical field, more specifically say, in particular to arc shield of circuit breaker.
Background
The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, and can automatically cut off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, so that a power supply circuit, electric equipment and the like are protected, and the circuit breaker plays an important role in a power distribution system. The existing circuit breaker generally comprises a contact system, an arc extinguishing system, an insulating shell, a switching on/off mechanism, an electrical control accessory and the like. The contact system generally comprises a moving contact system and a static contact system, when the breaker is opened, the moving contact system is separated from the static contact system, so that electric arcs are generated, and the electric arcs are elongated along with the increase of the distance between the moving contact system and the static contact system and finally introduced into the arc extinguishing system to be extinguished. Because the arc has extremely high heat and extremely strong electric conductivity, if the arc cannot be quickly and effectively extinguished, the safe operation of the circuit breaker and even the power distribution system is seriously influenced. At present, a conventional arc extinguishing system mainly comprises an arc striking plate, an arc extinguishing chamber and the like, when a breaker is opened by utilizing an opening and closing mechanism, a moving contact system is quickly pulled away from a static contact system, generated electric arcs are elongated and are led into the arc extinguishing chamber through the arc striking plate, and the electric arcs are cut into a plurality of sections of short arcs connected in series by a metal grid plate in the arc extinguishing chamber. Normally, when the circuit is broken, the energy of the short arc can be consumed by the metal grid piece until the arc is extinguished, but when the short-circuit current in the circuit is large, the arc is difficult to extinguish, and the breaker is easily damaged due to the high temperature of the arc.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a circuit breaker separates arc cover.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an arc-isolating cover of a circuit breaker comprises the circuit breaker, a moving contact and a static contact are arranged in the circuit breaker, the upper surface of the circuit breaker is fixedly provided with a cooling protection box, the top surface inside the circuit breaker is fixedly provided with a U-shaped cover at the position adjacent to the static contact, a plurality of groups of arc-extinguishing sheets are arranged on the inner side surface of the U-shaped cover in parallel, the arc-extinguishing sheets are positioned above the static contact, a convex sheet with an integrated structure is arranged on the upper part of the arc-extinguishing sheets, the upper surface of the circuit breaker is provided with clamp groove openings at the positions of the convex sheets, the upper ends of the convex sheets penetrate through the clamp groove openings and are inserted into the cooling protection box, cooling protection box one end is provided with the opening, and the inside multiunit flame piece that goes out that evenly is provided with of cooling protection box, and the equal fixed mounting in lower extreme position of the inside roof of cooling protection box and bottom has U type rib on the flame piece, the flame piece upper and lower extreme block with the U type rib that corresponds the position respectively.
Preferably, the cooling protection box is fixedly provided with a metal filter screen at the opening position.
Preferably, the arc-extinguishing piece one end is provided with the bulge of integrative structure, and the arc-extinguishing piece is fixed to be inserted through the bulge and is located U type cover inside surface.
Preferably, the flame-extinguishing sheet is of a wave-shaped structure.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a set up cooling protection box on the circuit breaker, when moving contact and static contact separation produced electric arc, electric arc can be drawn forth to cooling protection box through the effect of arc extinguishing piece and protruding piece, and electric arc and the high temperature of production can eliminate electric arc and make it extinguish through the multiunit flame extinguishing piece in the cooling protection box, and can carry out the heat exchange to high temperature, have reduced the temperature that heat energy came out from the opening of cooling protection box, have improved the security.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a structural diagram of an arc-isolating shield of a circuit breaker according to the present invention;
fig. 2 is a cross-sectional view of an arc chute of a circuit breaker of the present invention;
fig. 3 is a sectional view of the cooling protection box of the present invention.
In the figure: the circuit breaker comprises a circuit breaker 1, a cooling protection box 2, a moving contact 3, a static contact 4, a U-shaped cover 5, an arc extinguishing sheet 6, a protruding part 7, a clamping groove opening 8, a protruding sheet 9, a flame extinguishing sheet 10, a U-shaped rib 11, an opening 12 and a metal filter screen 13.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
Referring to fig. 1, 2 and 3, the utility model provides an arc-isolating cover of a circuit breaker, which comprises a circuit breaker 1, a moving contact 3 and a static contact 4 are arranged in the circuit breaker 1, a cooling protection box 2 is fixedly arranged on the upper surface of the circuit breaker 1, a U-shaped cover 5 is fixedly arranged on the upper surface of the inner part of the circuit breaker 1 at the position adjacent to the static contact 4, a plurality of groups of arc-extinguishing plates 6 are arranged in parallel on the inner side surface of the U-shaped cover 5, the arc-extinguishing plates 6 are arranged at the position above the static contact 4, a convex plate 9 with an integrated structure is arranged on the upper part of the arc-extinguishing plates 6, clamping notches 8 are arranged on the upper surface of the circuit breaker 1 at the position of the convex plate 9, the upper ends of the convex plates 9 are inserted into the cooling protection box 2 through the clamping notches 8, an opening 12 is arranged at one end of the cooling protection box 2, a plurality of groups of flame-extinguishing plates 10 are, the upper and lower ends of the flame-extinguishing sheet 10 are respectively engaged with the U-shaped ribs 11 at the corresponding positions.
In this embodiment, the cooling protection box 2 is fixedly provided with a metal filter screen 13 at the opening 12, so as to prevent external dust from entering.
In this embodiment, one end of the arc-extinguishing piece 6 is provided with a protruding portion 7 of an integrated structure, and the arc-extinguishing piece 6 is fixedly inserted into the inner side surface of the U-shaped cover 5 through the protruding portion 7.
In this embodiment, the flame-out sheet 10 is a wave-shaped structure, so that the distance that electric arcs or hot air passes through can be prolonged, and the heat dissipation efficiency is further improved.
The working principle is as follows: when moving contact 3 and static contact 4 separation produce electric arc, electric arc can be drawn forth to cooling protection box 2 through the effect of arc extinguishing piece 6 and protrusion piece 9, and electric arc and the high temperature of production can eliminate electric arc and make it extinguish through the multiunit flame extinguishing piece 10 in the cooling protection box 2, and can carry out the heat exchange to high temperature, have reduced the temperature that heat energy came out from opening 12 of cooling protection box 2.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.
Claims (4)
1. The utility model provides an arc blocking cover of circuit breaker, includes the circuit breaker, is provided with moving contact and static contact in the circuit breaker, its characterized in that: the circuit breaker upper surface is located fixed mounting and has the cooling protection box, and the inside top surface of circuit breaker has U type cover at the adjacent position fixed mounting of static contact, side surface parallel mount has the multiunit arc-extinguishing piece in the U type cover, the arc-extinguishing piece is located static contact top position, and arc-extinguishing piece upper portion is provided with the protrusion piece of an organic whole structure, the circuit breaker upper surface is located protrusion piece position and has all seted up the double-layered notch, protrusion piece upper end all runs through double-layered notch and inserts and locate the cooling protection box in, cooling protection box one end is provided with the opening, and inside multiunit flame-extinguishing piece that evenly is provided with of cooling protection box, the equal fixed mounting in lower extreme position has U type rib on the flame-extinguishing piece of inside roof of cooling protection box and bottom, the flame-extinguishing piece upper and lower extreme.
2. The arc chute of a circuit breaker as claimed in claim 1, wherein: the cooling protection box is fixedly provided with a metal filter screen at the opening position.
3. The arc chute of a circuit breaker as claimed in claim 1, wherein: one end of the arc-extinguishing piece is provided with a protruding part of an integrated structure, and the arc-extinguishing piece is fixedly inserted into the inner side surface of the U-shaped cover through the protruding part.
4. The arc chute of a circuit breaker as claimed in claim 1, wherein: the flame extinguishing sheet is of a wave-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020287438.3U CN211350551U (en) | 2020-03-10 | 2020-03-10 | Arc isolation cover of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020287438.3U CN211350551U (en) | 2020-03-10 | 2020-03-10 | Arc isolation cover of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211350551U true CN211350551U (en) | 2020-08-25 |
Family
ID=72099903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020287438.3U Expired - Fee Related CN211350551U (en) | 2020-03-10 | 2020-03-10 | Arc isolation cover of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211350551U (en) |
-
2020
- 2020-03-10 CN CN202020287438.3U patent/CN211350551U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200825 |