CN217847807U

CN217847807U - Vacuum arc-extinguishing chamber for circuit breaker

Info

Publication number: CN217847807U
Application number: CN202221907982.9U
Authority: CN
Inventors: 陈益飞
Original assignee: 777 Electric Technology Co ltd
Current assignee: 777 Electric Technology Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-11-18
Anticipated expiration: 2032-07-22

Abstract

The utility model discloses a vacuum interrupter for circuit breaker, including insulating casing, insulating casing's inside fixedly connected with shielding section of thick bamboo, two backup pads of the inner wall symmetry fixedly connected with of shielding section of thick bamboo, two mounting panels of the top symmetry fixedly connected with of backup pad, it is connected with the pivot to rotate between two mounting panels, the outside fixedly connected with baffle of pivot, the outside cover of pivot is equipped with torque spring, the quiet apron of bottom fixedly connected with of insulating casing, the quiet conducting rod of middle part fixedly connected with of quiet apron, the one end of quiet conducting rod is passed quiet apron and is extended to the inside of shielding section of thick bamboo, the top center department of shielding section of thick bamboo is equipped with the spread groove, the utility model discloses a connecting block, elastic metal piece, draw-in groove and spread groove that set up can make and take place the adhesion back between static contact and the moving contact, can take place the separation between static contact and the static conducting rod, still can cut off the power supply.

Description

Vacuum arc-extinguishing chamber for circuit breaker

Technical Field

The utility model relates to a vacuum interrupter technical field specifically is a vacuum interrupter for circuit breaker.

Background

The circuit breaker generally comprises a vacuum arc-extinguishing chamber, an operating mechanism, a release, a shell and the like, wherein the vacuum arc-extinguishing chamber is an important component in the circuit breaker, and the basic working principle of the vacuum arc-extinguishing chamber is that a moving contact and a static contact are sealed in a vacuum chamber cavity, the moving contact and the static contact are contacted and separated, and the high vacuum in the cavity is used as an insulating arc-extinguishing medium to realize the functions of switching on and switching off the current of the circuit breaker.

In the use process of the existing vacuum arc-extinguishing chamber, under partial conditions, virtual connection can occur between the moving contact and the static contact, so that the temperature between the moving contact and the static contact is too high, metals in contact with the moving contact and the static contact are fused, the adhesion is caused, the breaking of current cannot be realized, and the safety is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vacuum interrupter for circuit breaker to propose current vacuum interrupter in solving above-mentioned background art in the use, under the partial condition, virtual connecing can appear between moving contact and the static contact, leads to the high temperature between moving contact and the static contact, easily makes the metal fusion of moving contact and static contact, makes it take place the adhesion, and then can't realize breaking of electric current, the lower problem of security.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a vacuum interrupter for circuit breaker, includes insulating casing, insulating casing's inside fixedly connected with shielding section of thick bamboo, two backup pads of shielding section of thick bamboo's inner wall symmetry fixedly connected with, two mounting panels of top symmetry fixedly connected with of backup pad rotate between the mounting panel and be connected with the pivot, the outside fixedly connected with baffle of pivot, the outside cover of pivot is equipped with torque spring, the quiet apron of bottom fixedly connected with of insulating casing, the quiet conducting rod of middle part fixedly connected with of quiet apron, the one end of quiet conducting rod passes quiet apron and extends to the inside of shielding section of thick bamboo, the top center department of shielding section of thick bamboo is equipped with the spread groove, the inside sliding connection of spread groove has the connecting block, the equal fixedly connected with elastic metal piece in the left and right sides of connecting block, the inside of quiet conducting rod is equipped with the draw-in groove with elastic metal piece complex, the top fixedly connected with static contact of connecting block, the equal fixedly connected with in the left and right sides of static contact has the limiting plate with baffle complex.

As a preferred scheme of the utility model, torque spring's one end is with adjacent one side of mounting panel is connected, torque spring's the other end is connected with the outside of pivot.

As a preferred scheme of the utility model, the top fixedly connected with of a shielding section of thick bamboo moves the apron, the top fixedly connected with uide bushing that moves the apron, the internally mounted of uide bushing has the movable conducting rod.

As a preferred scheme of the utility model, the bottom of moving the conducting rod is passed and is moved the inside that the apron extends to a shielding section of thick bamboo, just move the bottom fixedly connected with and the static contact complex moving contact of conducting rod.

As an optimized scheme of the utility model, the bellows is installed in the outside of moving the conducting rod, the bellows is close to the one end of moving the apron and is connected with the bottom of moving the apron.

As a preferred scheme of the utility model, the limiting plate is located the below of baffle, the moving contact sets up with the static contact is coaxial.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a connecting block that sets up, the elastic metal piece, draw-in groove and spread groove can be so that after taking place the adhesion between static contact and moving contact, make and can take place the separation between static contact and the quiet conducting rod, still can cut off the power supply, simultaneously through the backup pad that sets up, the apparatus further comprises a rotating shaft, the limiting plate, torque spring and baffle make and make static contact and quiet conducting rod after-separating, the static contact can not contact once more with quiet conducting rod, lead to the electric current to switch on, thereby the security has been improved greatly, play the guide effect to the motion of moving the conducting rod through the uide bushing that sets up, guarantee the axiality of action in-process static contact and moving contact, thereby guarantee the area of contact between static contact and the moving contact.

Drawings

FIG. 1 is a front sectional view of the present invention;

FIG. 2 is an enlarged view of the point A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the present invention at B of FIG. 1;

fig. 4 is a top view of the rotating shaft of the present invention;

fig. 5 is an enlarged view of the present invention at C in fig. 4;

fig. 6 is a front sectional view of the moving contact and the static contact after being adhered;

fig. 7 is an enlarged view of the point D in fig. 6 according to the present invention.

In the figure: 1. an insulating housing; 2. a shielding cylinder; 3. a guide sleeve; 4. a movable cover plate; 5. a bellows; 6. a movable conductive rod; 7. a moving contact; 8. a static cover plate; 9. a static conductive rod; 10. a support plate; 11. a rotating shaft; 12. a torsion spring; 13. a baffle plate; 14. static contact; 15. a limiting plate; 16. connecting blocks; 17. an elastic metal sheet; 18. a card slot; 19. connecting grooves; 20. and (7) mounting the plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a technical solution: a vacuum arc-extinguishing chamber for a circuit breaker comprises an insulating shell 1, wherein a shielding cylinder 2 is fixedly connected inside the insulating shell 1, the shielding cylinder 2 can block arc products splashed to the periphery, attenuation of plasma after arc extinguishment is facilitated, and the insulating shell 1 is prevented from being polluted, two supporting plates 10 are symmetrically and fixedly connected to the inner wall of the shielding cylinder 2, two mounting plates 20 are symmetrically and fixedly connected to the top of each supporting plate 10, a rotating shaft 11 is rotatably connected between the two mounting plates 20, a baffle 13 is fixedly connected to the outer side of the rotating shaft 11, the baffle 13 can be used for blocking a limiting plate 15, when a static contact 14 is adhered to a movable contact 7, the movable contact 7 drives the static contact 14 to move, the static contact 14 drives the limiting plate 15 to move, after the limiting plate 15 moves above the baffle 13, the baffle 13 contacts the supporting plates 10 and is blocked by the supporting plates 10, so that the limiting plate 15 is blocked by the baffle 13, so that the static contact 14 does not contact with the static conductive rod 9 again, the safety is improved, the outer side of the rotating shaft 11 is sleeved with the torsion spring 12, the torsion spring 12 can limit the rotating shaft 11, and prevent the baffle 13 from rotating due to the action of gravity when the movable conductive rod 6 is installed downwards, and meanwhile, the baffle 13 can automatically reset, the bottom of the insulating shell 1 is fixedly connected with the static cover plate 8, the middle part of the static cover plate 8 is fixedly connected with the static conductive rod 9, one end of the static conductive rod 9 penetrates through the static cover plate 8 and extends into the shielding cylinder 2, the center of the top of the shielding cylinder 2 is provided with the connecting groove 19, the inside of the connecting groove 19 is slidably connected with the connecting block 16, the left side and the right side of the connecting block 16 are both fixedly connected with the elastic metal sheets 17, the inside of the static conductive rod 9 is provided with the clamping groove 18 matched with the elastic metal sheets 17, and the top of the connecting block 16 is fixedly connected with the static contact 14, after the static contact 14 and the moving contact 7 are adhered, when the moving contact 7 drives the static contact 14 to move, the elastic metal sheet 17 is squeezed and compressed by the inner wall of the static conductive rod 9, so that the elastic metal sheet 17 cannot fix the connecting block 16, the static contact 14 and the static conductive rod 9 are separated to cut off the power, and the limiting plates 15 matched with the baffle 13 are fixedly connected to the left side and the right side of the static contact 14.

One end of the torsion spring 12 is connected to one side of the adjacent mounting plate 20, and the other end of the torsion spring 12 is connected to the outer side of the rotating shaft 11.

The top of the shielding cylinder 2 is fixedly connected with a movable cover plate 4, the top of the movable cover plate 4 is fixedly connected with a guide sleeve 3, the guide sleeve 3 plays a role in guiding the movement of the movable conducting rod 6 and ensures the coaxiality of the static contact 14 and the movable contact 7 in the movement process, so that the contact area between the static contact 14 and the movable contact 7 is ensured, and the movable conducting rod 6 is arranged in the guide sleeve 3.

The bottom of the movable conducting rod 6 penetrates through the movable cover plate 4 and extends into the shielding cylinder 2, and the bottom of the movable conducting rod 6 is fixedly connected with a movable contact 7 matched with a static contact 14.

Wherein, the bellows 5 is installed to the outside of moving conducting rod 6, and bellows 5 is used for guaranteeing that moving conducting rod 6 can not destroy the encapsulated situation of explosion chamber when moving, moves conducting rod 6 and moves the one end of covering plate 4 and is connected with the bottom of covering plate 4 that moves of bellows 5 is close to.

The limiting plate 15 is located below the baffle 13, and the moving contact 7 and the static contact 14 are coaxially arranged.

Specifically, during normal use, an external operating mechanism drives the movable conductive rod 6 to move, the movable conductive rod 6 drives the movable contact 7 to move, the contact surface area between the movable contact 7 and the static contact 14 is rapidly reduced, when only one or a plurality of small contact electricity is left, the current density is increased, the temperature is rapidly increased until electrode metal evaporation occurs, an extremely high electric field strength is formed, strong field emission and gap breakdown are caused, a vacuum arc is generated, the distance between the movable contact 7 and the static contact 14 is increased, when the power frequency current is close to zero, plasma of the vacuum arc is rapidly diffused to the periphery, after the arc current crosses zero, a vacuum medium between the movable contact 7 and the static contact 14 is rapidly recovered to an insulator, the current is broken, when the movable contact 7 and the static contact 14 are adhered, the external operating mechanism drives the movable conductive rod 6 to move the movable contact 7, the static contact 7 moves the movable contact 14, the static contact 14 drives the connecting block 16 to move, the elastic metal sheet 17 is squeezed and compressed by the inner wall of the static conductive rod 9, so that the elastic metal sheet 17 plays a fixing role in fixing the connecting block 16, the connecting block the rotating baffle plate 13 when the rotating shaft moves clockwise, the rotating baffle plate 13 and the rotating baffle plate 13 is separated from the rotating baffle plate 13, when the rotating baffle plate 13 is moved clockwise, the rotating baffle plate 13 is separated by a limiting plate 13, the limiting plate 15 is blocked by the baffle 13, so that the static contact 14 cannot contact with the static conducting rod 9, thereby improving the safety.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted", "disposed", "connected", "fixed", "screwed" and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating the inside of two elements or for interacting with each other, unless otherwise specifically defined, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to the specific circumstances.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A vacuum interrupter for circuit breaker, includes insulating casing (1), its characterized in that: the interior of the insulating shell (1) is fixedly connected with a shielding cylinder (2), the inner wall of the shielding cylinder (2) is symmetrically and fixedly connected with two supporting plates (10), the top of the supporting plate (10) is symmetrically and fixedly connected with two mounting plates (20), a rotating shaft (11) is rotatably connected between the two mounting plates (20), a baffle (13) is fixedly connected with the outer side of the rotating shaft (11), a torsion spring (12) is sleeved on the outer side of the rotating shaft (11), the bottom of the insulating shell (1) is fixedly connected with a static cover plate (8), the middle part of the static cover plate (8) is fixedly connected with a static conductive rod (9), one end of the static conductive rod (9) penetrates through the static cover plate (8) and extends to the inside of the shielding cylinder (2), a connecting groove (19) is arranged at the center of the top of the shielding cylinder (2), the inside of the connecting groove (19) is connected with a connecting block (16) in a sliding way, the left side and the right side of the connecting block (16) are both fixedly connected with elastic metal sheets (17), a clamping groove (18) matched with the elastic metal sheet (17) is arranged in the static conductive rod (9), the top of the connecting block (16) is fixedly connected with a static contact (14), and the left side and the right side of the static contact (14) are fixedly connected with limit plates (15) matched with the baffle (13).

2. A vacuum interrupter for a circuit breaker according to claim 1, wherein: one end of the torsion spring (12) is connected with one side of the adjacent mounting plate (20), and the other end of the torsion spring (12) is connected with the outer side of the rotating shaft (11).

3. A vacuum interrupter for a circuit breaker according to claim 1, wherein: the top fixedly connected with of a shielding section of thick bamboo (2) moves apron (4), move top fixedly connected with uide bushing (3) of apron (4), the internally mounted of uide bushing (3) moves conducting rod (6).

4. A vacuum interrupter for a circuit breaker according to claim 3, characterized in that: the bottom of the movable conducting rod (6) penetrates through the movable cover plate (4) and extends into the shielding cylinder (2), and the bottom of the movable conducting rod (6) is fixedly connected with a movable contact (7) matched with the static contact (14).

5. The vacuum interrupter for a circuit breaker of claim 4, wherein: move the outside of conducting rod (6) and install bellows (5), bellows (5) are close to the one end of moving apron (4) and are connected with the bottom of moving apron (4).

6. The vacuum interrupter for a circuit breaker according to claim 4, wherein: the limiting plate (15) is positioned below the baffle (13), and the moving contact (7) and the static contact (14) are coaxially arranged.