CN213340206U

CN213340206U - Arc extinguish chamber of direct current bypass switch

Info

Publication number: CN213340206U
Application number: CN202022809794.XU
Authority: CN
Inventors: 张春才
Original assignee: Jingdezhen Yongxin Vacuum Electrical Appliance Co ltd
Current assignee: Jingdezhen Yongxin Vacuum Electrical Appliance Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-06-01
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a DC bypass switch arc extinguish chamber, which comprises a shell, wherein a vacuum cavity is arranged in the shell, a static contact and a moving contact are symmetrically arranged in the vacuum cavity up and down, one sides of the static contact and the moving contact far away are respectively and fixedly connected with a static conducting rod and a moving conducting rod, the top end and the bottom end of the shell are respectively provided with a static end cover plate and a moving end cover plate, the static conductive rod and the movable conductive rod respectively penetrate through the static end cover plate and the movable end cover plate, the inner wall of the vacuum cavity is provided with a shielding layer, the outer side of the shielding layer is connected with a heat-conducting column which penetrates through the shell and is connected with a heat-radiating bulge, the heat dissipation bulge is arranged on the shell, the positions of the outer side of the shell, which are close to the top and the bottom, are fixedly connected with rubber rings, the direct-current bypass switch arc extinguish chamber is convenient for leading out heat of the inner wall, and is beneficial to prolonging the service life of the arc extinguish chamber.

Description

Arc extinguish chamber of direct current bypass switch

Technical Field

The utility model relates to a direct current bypass switch explosion chamber belongs to explosion chamber technical field.

Background

The vacuum arc-extinguishing chamber is a core component of medium-high voltage power switch, mainly comprising airtight insulating shell, conductive circuit, shielding cylinder, contact, corrugated pipe and shielding cover, etc. the vacuum arc-extinguishing chamber is an electric vacuum device which utilizes high-vacuum working insulating arc-extinguishing medium and utilizes a pair of contacts sealed in vacuum to implement on-off function of power circuit, when it cuts off the current with a certain value, the current shrinks to the point just separated at the moment of separating the moving contact and the static contact, the resistance between the electrodes increases sharply and the temperature increases rapidly until the evaporation of the electrode metal occurs, meanwhile, extremely high electric field intensity is formed, extremely strong emission and gap breakdown are caused, vacuum electric arcs are generated, the generated vacuum electric arcs can increase the temperature in the shielding cylinder, so that the difference of connection between the moving contact and the static contact is caused, and the on-off electric energy of the moving contact and the static contact is unstable due to the increase of the temperature.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model overcomes current defect, provides a direct current bypass switch explosion chamber to solve the problem in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a direct current bypass switch explosion chamber, includes the casing, be equipped with the vacuum cavity in the casing, the interior longitudinal symmetry of vacuum cavity is equipped with static contact and moving contact, one side that static contact and moving contact were kept away from mutually is fixedly connected with quiet conducting rod respectively and moves the conducting rod, quiet end cover board is installed respectively with the bottom to the casing top and moves the end cover board, just quiet conducting rod runs through quiet end cover board respectively with moving the conducting rod and moves the end cover board, vacuum intracavity wall is equipped with the shielding layer, the shielding layer outside is connected with the heat conduction post, the heat conduction post runs through the casing and is connected with the heat dissipation arch, just the heat dissipation arch is located on the casing, the casing outside is close to the top and is close to the equal fixedly connected.

Furthermore, a groove and a protrusion are respectively arranged on the opposite sides of the static contact and the moving contact, and the groove is matched with the position structure of the protrusion.

Furthermore, the outer side of the movable conducting rod is connected with a corrugated pipe, the bottom of the corrugated pipe is connected with a movable end cover plate, and the corrugated pipe is located at the bottom of the vacuum cavity.

Furthermore, a shielding cover is arranged on the outer side of the corrugated pipe, and the shielding cover is arranged on the outer side of the movable conducting rod.

Furthermore, the top and the bottom of the rubber ring are both connected with ribbed plates which are fixedly connected with the shell.

The utility model has the advantages that: 1. the arrangement of the heat-conducting column and the heat-radiating bulge is favorable for guiding out heat in the vacuum cavity, avoids the difference in connection between the moving contact and the static contact caused by temperature rise, and is favorable for stabilizing the power-on and power-off capacity of the moving contact and the static contact;

2. through setting up the rubber ring, be favorable to protecting the explosion chamber, when striking or dropping, can effectual protection explosion chamber.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic view of the overall structure of a dc bypass switch arc extinguish chamber according to the present invention;

fig. 2 is a front view of an arc extinguishing chamber of a dc bypass switch of the present invention;

fig. 3 is a top view of the arc extinguishing chamber of the dc bypass switch of the present invention.

Reference numbers in the figures: 1. a housing; 2. a vacuum chamber; 3. static contact; 4. a moving contact; 5. a static conductive rod; 6. a movable conductive rod; 7. a stationary end cover plate; 8. a movable end cover plate; 9. a shielding layer; 10. a heat-conducting column; 11. a heat dissipation protrusion; 12. a rubber ring; 13. a groove; 14. a protrusion; 15. a bellows; 16. a shield case; 17. a rib plate.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1 to 3, a dc bypass switch arc extinguish chamber includes a housing 1, a vacuum chamber 2 is provided in the housing 1, a static contact 3 and a moving contact 4 are provided in the vacuum chamber 2 in an up-down symmetrical manner, a static conductive rod 5 and a moving conductive rod 6 are respectively and fixedly connected to one side of the static contact 3 and the moving contact 4 away from each other, a static end cover plate 7 and a moving end cover plate 8 are respectively installed at the top end and the bottom end of the housing 1, the static conductive rod 5 and the moving conductive rod 6 respectively penetrate through the static end cover plate 7 and the moving end cover plate 8, a shielding layer 9 is provided on the inner wall of the vacuum chamber 2, a heat conducting column 10 is connected to the outer side of the shielding layer 9, the heat conducting column 10 penetrates through the housing 1 and is connected to a heat dissipating protrusion 11, the heat dissipating protrusion 11 is provided on the housing 1, and rubber.

Specifically, as shown in fig. 1, a groove 13 and a protrusion 14 are respectively disposed on opposite sides of the fixed contact 3 and the movable contact 4, the groove 13 is matched with the protrusion 14 in position structure, a bellows 15 is connected to an outer side of the movable conductive rod 6, a movable end cover plate 8 is connected to a bottom of the bellows 15, the bellows 15 is located at a bottom of the vacuum chamber 2, a shielding cover 16 is disposed on an outer side of the bellows 15, and the shielding cover 16 is disposed on an outer side of the movable conductive rod 6.

Specifically, as shown in fig. 2, the top and the bottom of the rubber ring 12 are both connected with a rib plate 17, and the rib plate 17 is fixedly connected with the housing 1.

The utility model discloses the theory of operation: when the heat conducting column is used, the heat conducting column 10 and the heat radiating protrusion 11 are beneficial to guiding out heat in the vacuum cavity 2, so that the difference of connection between the moving contact 4 and the static contact 3 caused by temperature rise is avoided, and the stability of the power-on and power-off capacity of the moving contact 4 and the static contact 3 is facilitated.

The above is the preferred embodiment of the present invention, and the technical personnel in the field of the present invention can also change and modify the above embodiment, therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement made by the technical personnel in the field on the basis of the present invention, replacement or modification all belong to the protection scope of the present invention.

Claims

1. A DC bypass switch arc extinguish chamber comprises a shell (1), and is characterized in that a vacuum cavity (2) is arranged in the shell (1), a static contact (3) and a moving contact (4) are symmetrically arranged in the vacuum cavity (2) up and down, one side, far away from the static contact (3) and the moving contact (4), of the static contact (3) is fixedly connected with a static conducting rod (5) and a moving conducting rod (6) respectively, the top end and the bottom end of the shell (1) are provided with a static end cover plate (7) and a moving end cover plate (8) respectively, the static conducting rod (5) and the moving conducting rod (6) penetrate through the static end cover plate (7) and the moving end cover plate (8) respectively, the inner wall of the vacuum cavity (2) is provided with a shielding layer (9), the outer side of the shielding layer (9) is connected with a heat conducting column (10), the heat conducting column (10) penetrates through the shell (1) and is connected with a, the outer side of the shell (1) is close to the top and the bottom and is fixedly connected with a rubber ring (12).

2. The arc chute of a dc bypass switch according to claim 1, characterized in that: and a groove (13) and a protrusion (14) are respectively arranged on one side of the static contact (3) opposite to one side of the moving contact (4), and the groove (13) is matched with the protrusion (14) in position structure.

3. The arc chute of a dc bypass switch according to claim 1, characterized in that: the outer side of the movable conducting rod (6) is connected with a corrugated pipe (15), the bottom of the corrugated pipe (15) is connected with a movable end cover plate (8), and the corrugated pipe (15) is located at the bottom of the vacuum cavity (2).

4. The arc chute of a dc bypass switch according to claim 3, characterized in that: and a shielding cover (16) is arranged on the outer side of the corrugated pipe (15), and the shielding cover (16) is arranged on the outer side of the movable conducting rod (6).

5. The arc chute of a dc bypass switch according to claim 1, characterized in that: the top and the bottom of the rubber ring (12) are both connected with ribbed plates (17), and the ribbed plates (17) are fixedly connected with the shell (1).