CN220233024U - Vacuum arc-extinguishing chamber for circuit breaker - Google Patents

Abstract

The utility model discloses a vacuum arc-extinguishing chamber for a circuit breaker, which comprises an arc-extinguishing chamber body, wherein the top of the arc-extinguishing chamber body is fixedly connected with a movable end cover plate, the bottom of the arc-extinguishing chamber body is fixedly connected with a static end conductive block, the top of the movable end cover plate is provided with a movable conductive rod, the bottom of the movable conductive rod is fixedly connected with a movable contact, the bottom of the static end conductive block is provided with a static conductive rod, the top of the static conductive rod is fixedly connected with a static contact, the inner wall of the arc-extinguishing chamber body is provided with a shielding cover, the shielding cover is provided with an annular mounting plate on which the movable contact and the static contact are positioned, the annular mounting plate is provided with an annular fixing plate, and one side of the annular fixing plate, which is close to the movable contact and the static contact, is provided with a creepage groove. Through setting up and climb the electric chute, produce a large amount of electric arcs under the circumstances that vacuum interrupter did the disconnection, the electric arc is through climbing the unsmooth of electric chute and from interior to outside one deck design that is lower than the one deck, makes the increase creepage distance to reach the electric arc and climb the effect that electric ability weakens until the electric arc disappears.

Description

Vacuum arc-extinguishing chamber for circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a vacuum arc-extinguishing chamber for a circuit breaker.

Background

The vacuum arc-extinguishing chamber is a core component of a medium-high voltage power switch, and has the main effects of enabling the medium-high voltage power switch to rapidly extinguish arcs and inhibit current after the power supply is cut off through the excellent insulativity of vacuum in a pipe, avoiding accidents and accidents, being widely applied to power transmission and distribution control systems of electric power, and being also applied to power distribution systems of metallurgy, mines, petroleum, chemical industry, railway, broadcasting, communication, industrial high-frequency heating and the like. Has the advantages of energy saving, material saving, fire prevention, explosion prevention, small volume, long service life low maintenance cost, reliable operation, no pollution and the like.

In the prior art, the vacuum arc-extinguishing chamber still has some defects when in use, the vacuum arc-extinguishing chamber can generate an arc-discharging phenomenon in the current breaking process, most manufacturers in the prior art only set a shielding cover in the vacuum arc-extinguishing chamber for preventing the arc from breaking down, and the effect of preventing the arc from breaking down is achieved, the inner wall of the shielding cover is smooth, the arcs can easily mutually float and stay for a long time, even the possibility that the arc generated last time still exists when the current breaking process of the vacuum arc-extinguishing chamber is carried out for the next time is possible, and the service life of the vacuum arc-extinguishing chamber can be reduced when the vacuum arc-extinguishing chamber is used for a long time.

Disclosure of Invention

The utility model aims to provide a vacuum arc-extinguishing chamber for a circuit breaker, which aims to solve the problem that the vacuum arc-extinguishing chamber in the prior art can generate an arc-discharging phenomenon in the process of breaking current, most manufacturers only set a shielding cover in the vacuum arc-extinguishing chamber to prevent the arc from breaking down, and the inner wall of the shielding cover is smooth, so that the arc can easily mutually float and stay for a long time, even the possibility that the arc generated last time exists when the current is broken down in the next vacuum arc-extinguishing chamber can be reduced, and the service life of the vacuum arc-extinguishing chamber can be prolonged after long-time use.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a vacuum interrupter for circuit breaker, includes the explosion chamber body, explosion chamber body top fixed connection movable end apron, explosion chamber body bottom fixedly connected with static end conductive block, the movable end apron top is provided with the movable conductive rod, movable conductive rod bottom fixedly connected with moving contact, static end conductive block bottom is provided with the static conductive rod, static conductive rod top fixedly connected with static contact, explosion chamber body inner wall is provided with the shield cover, be located moving contact and static contact on the shield cover and be provided with annular mounting panel, be provided with annular fixed plate on the annular mounting panel, annular fixed plate is close to moving contact and static contact one side and is provided with the electric chute.

Preferably, one side, far away from the moving contact and the fixed contact, of the annular fixing plate is fixedly connected with one end of a plurality of rib plates, and the other end of each rib plate is fixedly connected to the surface of the annular mounting plate.

Preferably, the creepage groove adopts unsmooth structural design, and creepage groove size from inside to outside one deck is less than the one deck.

Preferably, the annular fixing plate and the annular mounting plate adopt an integrated structural design.

Preferably, the annular fixing plate, the creeper trough and the rib plate are of an integrated structural design.

Preferably, a glass cover is arranged on the outer wall of the arc extinguishing chamber body.

Preferably, the movable conducting rod is sleeved with a corrugated pipe, one end of the corrugated pipe is connected to the bottom of the movable contact, and the other end of the corrugated pipe is connected to the bottom of the movable end cover plate.

Preferably, the movable contact surface is fixedly connected with a guide block, the fixed contact surface is provided with a guide groove, and the guide block is matched with the guide groove.

Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

1. through setting up the electric chute that climbs, the moving contact that makes produces a large amount of electric arcs under making disconnection and closure state with the static contact, and the electric arc passes through the electric chute that climbs, through the unsmooth and design of electric chute from interior to outside one deck than the one deck low, makes the increase creepage distance to reach the electric arc and climb the effect that electric ability weakens until the electric arc disappears.

2. Through setting up annular mounting panel and annular fixed plate to in order to realize climbing the installation of electric tank and fixed effect.

3. Through setting up the floor, its setting can strengthen the impact in-process that produces the electric arc and bring, avoids annular fixed plate to be damaged, increases annular fixed plate's fastness.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a vacuum interrupter for a circuit breaker according to the present utility model;

fig. 2 is a schematic view illustrating an internal structure of a vacuum interrupter for a circuit breaker according to the present utility model;

fig. 3 is a schematic structural diagram of a shielding case of a vacuum interrupter for circuit breakers according to the present utility model.

1. An arc extinguishing chamber body; 2. a glass cover; 3. a movable end cover plate; 4. a static end conductive block; 5. a movable conductive rod;

6. a moving contact; 7. a stationary contact; 8. an annular mounting plate; 9. an annular fixing plate; 10 rib plates; 11. climbing an electric trough;

12. a static conductive rod; 13. a guide block; 14. a guide groove; 15. a shield; 16. a bellows.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "vertical", "horizontal", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific direction, construct and operate in the specific direction, and thus are not to be construed as limiting the present utility model. 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.

Fig. 1-3 are schematic structural views of a vacuum interrupter for a circuit breaker according to a preferred embodiment of the present utility model, in this embodiment, the vacuum interrupter for a circuit breaker includes an interrupter body 1, a movable end cover plate 3 is fixedly connected to the top of the interrupter body 1, a static end conductive block 4 is fixedly connected to the bottom of the interrupter body 1, a movable conductive rod 5 is arranged on the top of the movable end cover plate 3, a movable contact 6 is fixedly connected to the bottom of the movable conductive rod 5, a static conductive rod 12 is arranged on the bottom of the static end conductive block 4, a static contact 7 is fixedly connected to the top of the static conductive rod 12, a shielding cover 15 is arranged on the inner wall of the interrupter body 1, annular mounting plates 8 are arranged on the shielding cover 15 and on the movable contact 6 and the static contact 7, and an annular fixing plate 9 is arranged on one side of the annular mounting plates 9 close to the movable contact 6 and the static contact 7, and through the above structural arrangement, a large number of electric arcs are generated on the movable contact 6 and the static contact 7 in the opened and closed states, and through the electric grooves 11, arcs will disappear on the electric crawling 11, so as to avoid long-term service life of the vacuum interrupter from being damaged.

In this embodiment, the annular fixed plate 9 keep away from moving contact 6 and fixed contact 7 one side annular fixedly connected with a plurality of floor 10 one end, the other end fixed connection of floor 10 is in annular mounting panel 8 surface, through setting up floor 10, and in the impact process that it sets up and can strengthen producing the electric arc and bring, avoids annular fixed plate 9 to be damaged, increases the fastness of annular fixed plate 9.

In this embodiment, the creepage tank 11 adopts unsmooth structural design, and creepage tank 11 size from interior to outside one deck is less than the one deck, through creepage tank 11 unsmooth and design from interior to outside one deck is lower than the one deck, makes the increase creepage distance to reach the electric arc and climb the effect that electric arc creepage ability weakens until the electric arc disappears.

In this embodiment, the annular fixing plate 9 and the annular mounting plate 8 are integrally designed, the annular fixing plate 9, the creeper groove 11 and the rib plate 10 are integrally designed, and the firmness of connection is enhanced and the effect of reducing the cost is reduced by the arrangement of the above structures.

In this embodiment, be provided with glass cover 2 on the explosion chamber body 1 outer wall, its setting can more clear observation vacuum explosion chamber inside service condition.

In this embodiment, the movable conductive rod 5 is sleeved with a bellows 16, one end of the bellows 16 is connected to the bottom of the movable contact 6, and the other end of the bellows 16 is connected to the bottom of the movable end cover plate 3.

In this embodiment, moving contact 6 fixed surface is connected with guide block 13, and guide slot 14 has been seted up on the static contact 7 surface, and guide block 13 and guide slot 14 adaptation, thereby this structure sets up the effect that realizes that the explosion chamber can play the direction in the switching-on and off process, prevents to use the contact wearing and tearing for a long time after, makes contact inadequately between the contact.

The foregoing is a further elaboration of the present utility model in connection with the detailed description, and it is not intended that the utility model be limited to the specific embodiments shown, but rather that a number of simple deductions or substitutions be made by one of ordinary skill in the art without departing from the spirit of the utility model, should be considered as falling within the scope of the utility model as defined in the appended claims.

Claims (8)

1. The utility model provides a vacuum interrupter for circuit breaker, includes explosion chamber body (1), its characterized in that: the novel arc extinguishing chamber is characterized in that the top of the arc extinguishing chamber body (1) is fixedly connected with a movable end cover plate (3), the bottom of the arc extinguishing chamber body (1) is fixedly connected with a static end conducting block (4), the top of the movable end cover plate (3) is provided with a movable conducting rod (5), the bottom of the movable conducting rod (5) is fixedly connected with a movable contact (6), the bottom of the static end conducting block (4) is provided with a static conducting rod (12), the top of the static conducting rod (12) is fixedly connected with a static contact (7), the inner wall of the arc extinguishing chamber body (1) is provided with a shielding cover (15), the shielding cover (15) is provided with an annular mounting plate (8) on which an annular fixing plate (9) is arranged, and the annular fixing plate (9) is close to the movable contact (6) and one side of the static contact (7) and is provided with a climbing groove (11).

2. The vacuum interrupter for circuit breakers of claim 1, wherein: one side, far away from the moving contact (6) and the fixed contact (7), of the annular fixing plate (9) is fixedly connected with one end of a plurality of rib plates (10), and the other end of each rib plate (10) is fixedly connected to the surface of the annular mounting plate (8).

3. The vacuum interrupter for circuit breakers of claim 1, wherein: the creepage groove (11) adopts concave-convex structural design, and the creepage groove (11) is smaller than one layer from inside to outside.

4. The vacuum interrupter for circuit breakers of claim 2, wherein: the annular fixing plate (9) and the annular mounting plate (8) adopt an integrated structural design.

5. The vacuum interrupter for circuit breakers of claim 2, wherein: the annular fixing plate (9), the creeper grooves (11) and the rib plates (10) are integrally designed.

6. The vacuum interrupter for circuit breakers of claim 1, wherein: the outer wall of the arc extinguish chamber body (1) is provided with a glass cover (2).

7. The vacuum interrupter for circuit breakers of claim 1, wherein: the movable conducting rod (5) is sleeved with a corrugated pipe (16), one end of the corrugated pipe (16) is connected to the bottom of the movable contact (6), and the other end of the corrugated pipe (16) is connected to the bottom of the movable end cover plate (3).

8. The vacuum interrupter for circuit breakers of claim 1, wherein: the movable contact (6) is fixedly connected with a guide block (13) on the surface, a guide groove (14) is formed in the surface of the fixed contact (7), and the guide block (13) is matched with the guide groove (14).