CN214203588U

CN214203588U - Big-opening-distance double-breakpoint circuit breaker

Info

Publication number: CN214203588U
Application number: CN202120561715.XU
Authority: CN
Inventors: 邓卫新; 令狐绍江; 卢山念; 葛世伟; 袁辉; 高腾飞; 臧卫; 陆俊谦
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-09-14
Anticipated expiration: 2031-03-18

Abstract

The utility model provides a big opening distance double-breakpoint circuit breaker, include: the contact assembly is arranged on the shell and comprises a moving contact and a static contact, and the static contact and the moving contact can be contacted or disconnected; the contact cover is arranged on the static contact and is provided with an air guide channel which can generate gas and blow an arc to the arc extinguishing assembly, and the circuit breaker improves arc striking force and arc blowing force, thereby effectively improving arc extinguishing efficiency.

Description

Big-opening-distance double-breakpoint circuit breaker

Technical Field

The utility model relates to a low pressure distribution field, concretely relates to big break-point circuit breaker.

Background

At present, all install the explosion chamber that is used for the arc extinguishing in the circuit breaker on the market, the position that the driven contact of electric arc and static contact contacted gets into in the explosion chamber, and the explosion chamber is simple comprises a plurality of arc extinguishing bars piece and the arc extinguishing chamber of living with all arc extinguishing bars piece wraps up, and electric arc is separated into a plurality of short arcs by a plurality of arc isolating bars piece under the promotion of the magnetic field in the explosion chamber and fluid effect, reaches the effect of arc extinguishing, and adopts this kind of arc extinguishing mode, the arc extinguishing effect that reaches is general.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the general defect of explosion chamber arc extinguishing effect among the prior art to a big open distance double-break-point circuit breaker that arc extinguishing effect is good is provided.

Therefore, the utility model provides a large-opening-distance double-breakpoint circuit breaker, which comprises a contact assembly, a fixed contact and a movable contact, wherein the contact assembly is arranged on a shell and comprises the movable contact and the fixed contact, and the fixed contact and the movable contact can be contacted or disconnected;

the contact cover is arranged on the static contact and is provided with an air guide channel which can generate gas and blow the electric arc to the arc extinguishing assembly.

Further: the arc extinguishing subassembly includes the arc extinguishing bars piece, is used for holding the explosion chamber of arc extinguishing bars piece and with the gas outlet of explosion chamber UNICOM, blocking face and air guide face have been seted up to the contact cover, the air guide face is used for in the gas blowing entering arc extinguishing chamber with higher speed, blocking the face and being used for preventing gaseous withdrawal.

Further: the blocking surface is a vertical surface, and the air guide surface is an air guide inclined surface extending towards the arc extinguish chamber.

Further: the inside arc ignition angle that is provided with of air guide channel, arc ignition angle department are provided with draw-in groove and striking piece, and the striking piece card is located inside the draw-in groove and is laminated with the air guide inclined plane, the striking piece is used for guiding the air-blowing direction to blow to the explosion chamber.

Further: and a clamping groove is arranged at the arc striking piece and is clamped with the arc striking piece.

Further: the static contact is provided with a contact, the contact is used for contacting with the moving contact, and a gas blocking rib for preventing air flow and electric arc from jumping backwards extends on the position of the side wall of the shell.

Further: and a horn mouth is formed between the air blocking rib and the arc striking sheet.

Further: and a silver coating film for sealing the bottom of the air guide channel is arranged at the contact, and the silver coating film covers the outside of the contact.

Further: and the contact cover is provided with a reinforcing rib for preventing the contact cover from cracking.

Further: the static contact comprises an extension section, a bending section and a connecting section, the contact is arranged at the connecting section, and the connecting section is arranged adjacent to the upper panel or the lower panel of the shell.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a big opening distance double-breakpoint circuit breaker, the contact cover plays the effect that shelters from the static contact on the one hand, prevents to scurry the static contact because of electric arc, and on the other hand because the contact cover is made for producing the gas material, can produce a large amount of gases, because air guide channel's setting is again moving, when the static contact divides absolutely, air guide channel can produce the gas, and promote electric arc and remove towards the direction of explosion chamber, reduces the electric arc stagnation like this, its time of getting into the arc chute piece with higher speed to arc extinguishing effect has been improved.

2. The utility model provides a big double break point circuit breaker of opening range is provided with inclined plane and vertical face on the contact cover, and vertical face can prevent gaseous withdrawal, and the inclined plane can blow the explosion chamber with higher speed to the air-blowing speed has been improved.

3. The utility model provides a big opening distance double-breakpoint circuit breaker through the setting of striking piece, can effectual guide air-blowing direction blow to the explosion chamber.

4. The utility model provides a big double-breakpoint circuit breaker of opening range holds and has set up the fender gas muscle on the lateral wall of chamber, and it scurries behind effective air current and the electric arc to keep off the gas muscle.

5. The utility model provides a big double-break-point circuit breaker of opening range keeps off the gas muscle and forms the horn mouth with the striking piece, presss from both sides the explosion chamber in the centre, is favorable to arc blowing and striking.

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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 schematic view of the overall structure of the large-opening-distance double-break-point circuit breaker;

fig. 2 is a schematic perspective view of the moving contact in fig. 1 with the moving contact removed;

FIG. 3 is a schematic perspective view of FIG. 1 at another angle;

FIG. 4 is a schematic perspective view of the contact shell of FIG. 1 with the contact shell removed;

FIG. 5 is a schematic perspective view of a contact shell;

FIG. 6 is a diagram of the position relationship between the contact cover and the arc chute;

FIG. 7 is a schematic perspective view of another side of the contact shell;

FIG. 8 is a cross-sectional view of a contact shell.

Reference numerals: 1. a contact assembly; 11. a moving contact; 12. static contact; 13. a contact; 2. a housing; 3. a contact cover; 31. an air guide channel; 32. a blocking surface; 33. a gas-guiding surface; 4. an arc extinguishing assembly; 41. arc extinguishing grid pieces; 42. an arc extinguishing chamber; 43. an air outlet; 5. a card slot; 51. an arc striking sheet; 6. a gas barrier rib; 61. coating a silver film; 7. reinforcing ribs; 8. an extension section; 81. bending the section; 82. and (4) connecting the sections.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Examples

The embodiment provides a large-opening-distance double-breakpoint circuit breaker, which comprises a contact assembly 1, a fixed contact 12 and a movable contact 11, wherein the contact assembly 1 is arranged on a shell 2 and comprises the movable contact 12 and the fixed contact 12, and the fixed contact 12 and the movable contact 11 can be contacted or disconnected; the contact cover 3 is arranged on the static contact 12 and is provided with an air guide channel 31 which can generate gas and blow the electric arc to the arc extinguishing component 4.

The specific improvement is as follows: as shown in fig. 1: the moving contact 11 and the static contact 12 are arranged in the shell 2, the static contact 12 is fixedly arranged in the shell 2, when the electric appliance is powered on, the moving contact 11 is inserted into the contact cover 3 and connected with the static contact 12, when the electric appliance is disconnected, the moving contact 11 can be separated from the static contact 12, a large amount of electric arcs are generated in the separation process, in the electric arc generation process, the temperature of the contact cover 3 rises, a large amount of gas is generated, the gas pushes the electric arcs to be conducted in the arc extinguish chamber 42, the advantages of the prior art are achieved, after the disconnection process, the contact cover 3 generates the gas, the electric arcs are pushed to enter the arc extinguish chamber 42, and the arc extinguish efficiency is improved.

On the basis of the above-described embodiment: arc extinguishing subassembly 4 includes arc extinguishing bars piece 41, be used for holding arc extinguishing bars piece 41's explosion chamber 42 and with the gas outlet 43 of explosion chamber 42 UNICOM, blocking face 32 and air guide face 33 have been seted up to contact cover 3, air guide face 33 is used for accelerating the gas blowing and gets into in the explosion chamber 42, blocking face 32 is used for preventing gaseous withdrawal.

The specific improvement is as follows: as shown in fig. 1: after the circuit breaker is disconnected, the electric arc rapidly enters the arc extinguishing chamber 42 due to the air blowing effect of the contact cover 3, then is extinguished through the arc extinguishing grid piece 41, and finally is exhausted through the air outlet 43.

The specific improvement is as follows: as shown in fig. 5-8: the contact cover 3 is provided with a blocking surface 32 and a gas guide surface 33, the blocking surface 32 can effectively block gas from withdrawing, and the gas guide surface 33 can be arranged in an inclined plane, so that gas blowing can be effectively accelerated to enter the arc extinguish chamber 42.

On the basis of the above-described embodiment: the inside arc ignition angle that is provided with of air guide channel 31, arc ignition angle department is provided with draw-in groove 5, arc ignition angle department is provided with arc ignition piece 51, and arc ignition piece 51 card is established with draw-in groove 5 inside, arc ignition piece 51 and the laminating of air guide inclined plane, arc ignition piece 51 is used for guiding the air-blowing direction to blow to explosion chamber 42.

The specific improvement is as follows: as shown in fig. 6: the clamping groove 5 is formed in the air guide channel 31, the shape of the arc striking piece 51 arranged in the clamping groove 5 is attached to the air guide inclined plane, the arc striking piece 51 has the effect that electric arcs can be effectively guided to enter the arc extinguishing chamber 42, and the arc striking piece 51 is clamped in the clamping groove of the contact cover, so that the contact cover has the advantages of being simple in structure and fast and convenient to assemble.

On the basis of the above-described embodiment: the fixed contact 12 is provided with a contact 13, and the contact 13 is used for contacting with the fixed contact 12.

The specific improvement is as follows: as shown in fig. 4: the contact 13 is disposed on the stationary contact 12 and contacts with the movable contact 11, and the contact 13 may be made of a metal material with high conductivity.

On the basis of the above-described embodiment: the position of the side wall of the shell 2 is extended with a gas blocking rib 6 for preventing air flow and electric arc from channeling, and a horn mouth is formed between the gas blocking rib 6 and the arc striking sheet 51.

The specific improvement is as follows: the gas blocking rib 6 and the arc striking plate form a horn mouth, and the arc extinguishing chamber 42 is clamped in the middle, so that arc striking and arc blowing are facilitated.

On the basis of the above-described embodiment: the contact is provided with a silver coating 61 for closing the air guide channel 31, and the silver coating 61 covers the outside of the contact 13.

The specific improvement is as follows: the contact 13 is covered by a silver coating film, or the whole contact 13 is made of silver material, so that one contact 13 can have good conductivity; the two can seal one end of the air guide channel 31 provided with the contact 13 (the sealing means that the area of the contact almost occupies the bottom position of the air guide channel 31), so that one end of the air guide channel 31 is sealed, after the breaking, the contact cover 3 generates gas, the air pressure at one end of the contact 13 is increased, the air pressure at the arc extinguishing chamber 42 is lower than the air pressure at the contact 13, and the air pressure generated by the contact cover 3 can push the electric arc to the arc extinguishing chamber 42.

On the basis of the above-described embodiment: the contact cover 3 is provided with a reinforcing rib 7 for preventing the contact cover 3 from cracking.

The specific improvement is as follows: through the arrangement of the reinforcing ribs 7, the contact cover 3 can be effectively prevented from being blown apart by the atmospheric air.

On the basis of the above-described embodiment: the fixed contact 12 includes an extending section 8, a bending section 81, and a connecting section 82, and the connecting section 82 is disposed adjacent to the upper panel or the lower panel of the housing 2.

The specific improvement is as follows: as shown in fig. 1-4: the static contact 12 comprises an extension section 8, a bending section 81 and a connecting section 82, the contact is arranged at the position of the connecting section 82, and the connecting section 82 is positioned on the upper panel or the lower panel of the shell 2, so that the original opening distance can be doubled, and the breaking requirement of high voltage is met.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a big double break point circuit breaker which characterized in that: comprises that

The contact assembly (1) is arranged on the shell (2) and comprises a moving contact (11) and a static contact (12), and the static contact (12) and the moving contact (11) can be contacted or disconnected;

the contact cover (3) is arranged on the static contact (12) and is provided with an air guide channel (31) which can generate gas and blow the electric arc to the arc extinguishing component (4).

2. The large-opening-distance double-breakpoint circuit breaker according to claim 1, wherein: arc extinguishing subassembly (4) including arc extinguishing bars piece (41), be used for holding arc extinguishing bars piece (41) arc extinguishing chamber (42) and with gas outlet (43) of arc extinguishing chamber (42) UNICOM, blocking face (32) and air guide face (33) have been seted up in contact cover (3), air guide face (33) are used for accelerating the gas and blow the arc and get into in arc extinguishing chamber (42), blocking face (32) are used for preventing gaseous withdrawal.

3. A large opening distance double break point circuit breaker according to claim 2, characterized in that: the blocking surface (32) is a vertical surface, and the air guide surface (33) is an air guide inclined surface extending towards the arc extinguish chamber (42).

4. A large opening double break point circuit breaker according to any one of claims 1-3, characterized in that: the gas guide channel (31) inside is provided with the run-on angle, and the run-on angle department is provided with draw-in groove (5) and run-on piece (51), and run-on piece (51) card is located draw-in groove (5) inside and is laminated with the gas guide inclined plane, run-on piece (51) are used for guiding the air-blowing direction to blow to explosion chamber (42).

5. The large-opening-distance double-breakpoint circuit breaker according to claim 4, wherein: a clamping groove (5) is formed in the arc striking piece, and the clamping groove (5) is connected with the arc striking piece (51) in a clamping mode.

6. The large-opening-distance double-breakpoint circuit breaker according to claim 5, wherein: the static contact (12) is provided with a contact (13), the contact (13) is used for contacting with the dynamic contact (11), and a gas blocking rib (6) for preventing air flow and electric arc from back channeling extends on the side wall of the shell (2).

7. The large-opening-distance double-breakpoint circuit breaker according to claim 6, wherein: and a horn mouth is formed between the air blocking rib (6) and the arc striking sheet (51).

8. The large-opening-distance double-breakpoint circuit breaker according to claim 7, wherein: and a silver coating film for closing the bottom of the air guide channel (31) is arranged at the contact, and the silver coating film is covered outside the contact (13).

9. The large-opening-distance double-breakpoint circuit breaker according to claim 8, wherein: and the contact cover (3) is provided with a reinforcing rib (7) for preventing the contact cover (3) from cracking.

10. A large opening distance double break point circuit breaker according to claim 9, characterized in that: the static contact (12) comprises an extension section (8), a bending section (81) and a connection section (82), the contact (13) is arranged at the connection section (82), and the connection section (82) is arranged close to the upper panel or the lower panel of the shell (2).