CN218975342U

CN218975342U - Arc extinguishing chamber and universal circuit breaker thereof

Info

Publication number: CN218975342U
Application number: CN202223593194.XU
Authority: CN
Inventors: 陈庭发; 胡旭阳; 邓家艳; 戴少蒲; 王�锋
Original assignee: Hokuriku Electric Industry Co Ltd
Current assignee: Hokuriku Electric Industry Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-05
Anticipated expiration: 2032-12-29

Abstract

The utility model relates to an arc-extinguishing chamber and a universal circuit breaker thereof, which are characterized by comprising an arc-extinguishing chamber shell and an arc-extinguishing grid sheet arranged in the arc-extinguishing chamber shell, wherein an exhaust window, a gas-producing screen and a cover plate are arranged at the exhaust end of the arc-extinguishing chamber shell, the cover plate is fixedly connected with the arc-extinguishing chamber shell and encapsulates the exhaust window and the gas-producing screen, the gas-producing screen is arranged between the exhaust window and the cover plate, an exhaust hole I is formed on the exhaust window, an exhaust hole II is formed on the cover plate, the exhaust hole I and the exhaust hole II are arranged in a staggered manner, and a gap formed between the exhaust hole I and the arc-extinguishing chamber grid sheet is directly communicated. The exhaust hole I formed by the exhaust window is staggered with the exhaust hole II on the cover plate, and the gap between the exhaust window and the arc extinguishing grid sheet is directly communicated, namely, gas can directly enter the exhaust hole I from the gap, so that the gas can be conveniently exhausted, and external substances can be prevented from entering the arc extinguishing chamber.

Description

Arc extinguishing chamber and universal circuit breaker thereof

Technical Field

The utility model relates to the technical field of arc-extinguishing chambers in circuit breakers, in particular to an arc-extinguishing chamber and a universal circuit breaker thereof.

Background

The circuit breaker is opened instantly by a moving contact and a static contact of a contact system in the breaking process, so that an arc is generated. The arc is compromised as follows: (1) The contact is opened, but the circuit to be cut is not actually opened due to the existence of the arc; (2) When the short-circuit current is disconnected, the arc temperature can reach 7000K-20000K, which is enough to melt the contact to destroy the breaker; (3) The high temperature ionized gas generated by the arc heats surrounding objects, causing a fire.

The arc extinguishing chamber of the low-voltage universal circuit breaker is arranged for extinguishing the arc. According to the short arc extinction principle, an extinction chamber of an extinction grid sheet made of a thin steel plate is arranged above a contact, when the contact breaks a circuit, particularly when short circuit current is broken, arc current is generated between the contacts, the arc enters the extinction grid sheet under the driving of electrodynamic force and gas effect, the extinction grid sheet divides an arc into a plurality of series short arcs, the arc voltage is larger than the broken voltage and is difficult to maintain under the action of a near cathode effect, and meanwhile, the extinction grid sheet absorbs arc heat, so that the arc is rapidly cooled and extinguished. The existing arc extinguishing chamber is generally communicated with the outside, and can not prevent external substances from entering the arc extinguishing chamber.

Disclosure of Invention

The utility model aims to provide an arc extinguishing chamber and a universal circuit breaker thereof, which can facilitate gas discharge and prevent external substances from entering the inside of the arc extinguishing chamber.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an explosion chamber, its characterized in that includes explosion chamber shell and sets up the arc extinguishing bars piece in the explosion chamber shell, the exhaust end of explosion chamber shell is provided with exhaust window, gas production otter board and apron, the apron with explosion chamber shell fixed connection to with exhaust window and gas production otter board encapsulation, wherein gas production otter board sets up between exhaust window and apron, be formed with exhaust hole one on the exhaust window, be formed with exhaust hole two on the apron, exhaust hole one and exhaust hole two fall the setting in a staggered way, exhaust hole one with the space that forms between the explosion chamber bars piece communicates with each other directly.

The utility model further provides that the gas generating screen plate is arranged on the exhaust window, a plurality of exhaust holes III are formed on the gas generating screen plate, and the exhaust holes III are directly communicated with the exhaust holes.

The utility model further provides that the exhaust window is embedded and installed in the arc-extinguishing chamber shell, embedded grooves are formed on the first inner wall and the second inner wall of the arc-extinguishing chamber shell, and embedded blocks are formed on the corresponding exhaust window.

The utility model further provides that the arc extinguishing grating sheet is in plug connection with the arc extinguishing chamber shell, a plug connection part is formed on the arc extinguishing grating sheet, a slot is formed in the arc extinguishing chamber shell, and the plug connection part of the arc extinguishing grating sheet is positioned in the slot when the arc extinguishing chamber is installed.

The utility model further provides that one end of the arc extinguishing grid sheet forms a first inclined section and a second inclined section, and an included angle between the first inclined section and the second inclined section is 120-150 degrees.

The utility model further provides that the third exhaust hole is a round hole.

The utility model further provides that a screw mounting hole is formed in the cover plate, and the screw mounting hole is positioned around the area formed by the exhaust hole II.

The utility model further provides that both ends of the cover plate are also provided with fixed mounting holes for mounting on the circuit breaker.

The utility model further provides that the end part of the arc extinguishing grid sheet is provided with an arc striking grid sheet.

The universal circuit breaker is characterized by comprising the arc extinguishing chamber.

The utility model has the beneficial effects that: the exhaust hole I formed by the exhaust window is staggered with the exhaust hole II on the cover plate, and the gap between the exhaust window and the arc extinguishing grid sheet is directly communicated, namely gas can directly enter the exhaust hole I from the gap, so that the gas can be conveniently exhausted, and external substances can be prevented from entering the arc extinguishing chamber; and secondly, the gas production screen plate is provided with the gas exhaust hole III, so that the electric arc can be prevented from being directly sprayed out of the circuit breaker, the electric arc returns to the arc extinguishing chamber, various charged particles generated at high temperature can be effectively prevented from flying out of the arc extinguishing chamber by the gas production screen plate, the effect of zero flying fox is achieved, and meanwhile, the electric arc can be rapidly cooled by gas generated at high temperature.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is an exploded view of an embodiment of the present utility model.

Fig. 2 is a side view of an embodiment of the present utility model.

Fig. 3 is a cross-sectional view at A-A in fig. 2.

Reference numeral 10, arc extinguishing chamber housing; 101. a first inner wall; 102. a second inner wall; 103. an embedding groove; 104. a slot; 20. arc extinguishing grid plates; 201. a plug-in part; 202. a first sloped section; 203. a second sloped section; 30. arc striking grid sheets; 40. an exhaust window; 401. an exhaust hole I; 402. an embedded block; 50. a gas producing screen; 501. an exhaust hole III; 60. a cover plate; 601. an exhaust hole II; 602. a screw mounting hole; 603. fixing the mounting hole;

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings and examples, so that the implementation process of how the technical means are applied to solve the technical problems and achieve the technical effects of the present application can be fully understood and implemented accordingly.

As shown in fig. 1-3, the present utility model is an arc extinguishing chamber, comprising an arc extinguishing chamber housing 10 and arc extinguishing gate sheets 20 arranged in the arc extinguishing chamber housing 10, wherein the end parts of the arc extinguishing gate sheets 20 are provided with arc striking gate sheets 30.

The exhaust end of the arc-extinguishing chamber housing 10 is provided with an exhaust window 40, a gas generating screen 50 and a cover plate 60, the cover plate 60 is fixedly connected with the arc-extinguishing chamber housing 10 and encapsulates the exhaust window 40 and the gas generating screen 50, wherein the gas generating screen 50 is arranged between the exhaust window 40 and the cover plate 60, an exhaust hole I401 is formed on the exhaust window 40, an exhaust hole II 601 is formed on the cover plate 60, the exhaust hole I401 and the exhaust hole II 601 are arranged in a staggered mode, and a gap formed between the exhaust hole I401 and the arc-extinguishing chamber gate sheet is directly communicated.

The gas generating screen 50 is disposed on the exhaust window 40, and a plurality of third exhaust holes 501 are formed on the gas generating screen 50, and the third exhaust holes 501 are directly communicated with the first exhaust holes 401.

The exhaust window 40 is embedded in the arc-extinguishing chamber housing 10, embedded grooves 103 are formed on a first inner wall 101 and a second inner wall 102 of the arc-extinguishing chamber housing 10, embedded blocks 402 are formed on the corresponding exhaust window 40, two embedded grooves 103 are respectively formed on the first inner wall 101 and the second inner wall 102, four embedded grooves 103 are formed in total, and the embedded blocks 402 are correspondingly formed into four.

The arc extinguishing grating sheet 20 is inserted into the arc extinguishing chamber housing 10, an insertion portion 201 is formed on the arc extinguishing grating sheet 20, a slot 104 is formed in the arc extinguishing chamber housing 10, and when the arc extinguishing chamber is installed, the insertion portion 201 of the arc extinguishing grating sheet 20 is located in the slot 104.

One end of the arc extinguishing grid sheet 20 forms a first inclined section 202 and a second inclined section 203, and an included angle between the first inclined section 202 and the second inclined section 203 is 120-150 degrees.

The third exhaust hole 501 is a circular hole, and is formed on the gas generating mesh plate 50 in a rectangular arrangement, and in addition, other shapes of holes, such as rectangular holes or diamond or triangle, may be used in the present embodiment.

The cover plate 60 is formed with screw mounting holes 602, the screw mounting holes 602 are located around the area formed by the exhaust hole two 601, and screws are arranged in the screw mounting holes 602 to connect the arc extinguishing shell and the cover plate 60.

The cover plate 60 is also formed at both ends thereof with fixing mounting holes 603 for mounting on the circuit breaker.

The utility model also provides a universal circuit breaker which is provided with the arc extinguishing chamber.

The first exhaust hole 401 formed by the exhaust window 40 and the second exhaust hole 601 on the cover plate 60 are arranged in a staggered manner, and the gaps between the first exhaust hole 401 and the arc extinguishing grid plates 20 are directly communicated, namely, gas can directly enter the first exhaust hole 401 from the gaps, so that the gas can be conveniently exhausted, and external substances can be prevented from entering the arc extinguishing chamber; and secondly, the gas production screen 50 is provided with the three exhaust holes 501, which can prevent the electric arc from being directly sprayed out of the circuit breaker, so that the electric arc returns to the arc extinguishing chamber, the gas production screen 50 can effectively prevent various charged particles generated at high temperature from flying out of the arc extinguishing chamber, the effect of zero flying fox is achieved, and meanwhile, the gas generated at high temperature can be rapidly cooled to the electric arc.

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one of the elements" does not exclude the presence of additional identical elements in a commodity or system comprising the element.

While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as disclosed herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims

1. The utility model provides an explosion chamber, its characterized in that includes explosion chamber shell and sets up the arc extinguishing bars piece in the explosion chamber shell, the exhaust end of explosion chamber shell is provided with exhaust window, gas production otter board and apron, the apron with explosion chamber shell fixed connection to with exhaust window and gas production otter board encapsulation, wherein gas production otter board sets up between exhaust window and apron, be formed with exhaust hole one on the exhaust window, be formed with exhaust hole two on the apron, exhaust hole one and exhaust hole two fall the setting in a staggered way, exhaust hole one with the space that forms between the explosion chamber bars piece communicates with each other directly.

2. The arc extinguishing chamber according to claim 1, wherein the gas generating mesh plate is disposed on the exhaust window, and a plurality of third exhaust holes are formed in the gas generating mesh plate, and the third exhaust holes are directly communicated with the exhaust holes.

3. An arc chute according to claim 1 or 2, wherein the vent window is embedded in the arc chute housing, and wherein the first and second inner walls of the arc chute housing have embedded grooves formed therein, and the corresponding vent window has embedded blocks formed therein.

4. An arc chute according to claim 3 wherein the arc chute is in a socket connection with the arc chute housing, the arc chute is formed with a socket connection, and the socket connection of the arc chute is located in the socket when installed.

5. The arc chute of claim 4 wherein one end of the arc chute sheet forms a first angled section and a second angled section, the first angled section and the second angled section having an included angle of 120-150 °.

6. An arc chute according to claim 2 wherein the third vent is a circular hole.

7. The arc chute according to claim 5, wherein the cover plate is formed with screw mounting holes, and the screw mounting holes are located around the area where the exhaust holes are formed.

8. The arc chute of claim 7 wherein the cover plate is further formed at both ends thereof with a fixed mounting hole for mounting on a circuit breaker.

9. The arc chute of claim 8 wherein the end of the arc chute is provided with an arc striking chute.

10. A universal circuit breaker having an arc chute as claimed in any one of claims 1 to 9.