CN219350079U

CN219350079U - Vacuum arc-extinguishing chamber for circuit breaker

Info

Publication number: CN219350079U
Application number: CN202222857980.XU
Authority: CN
Inventors: 陈益飞
Original assignee: 777 Electric Technology Co ltd
Current assignee: 777 Electric Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-07-14
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to a vacuum arc-extinguishing chamber for a circuit breaker, which comprises a porcelain shell, a movable cover plate, a static cover plate, a movable conducting rod and a static conducting rod, wherein the movable cover plate and the static cover plate are respectively arranged at two ends of the porcelain shell, a guide sleeve is arranged on the movable cover plate, a heat-conducting silica gel layer is tightly attached to the inner wall of the porcelain shell, a plurality of heat-absorbing grooves are formed in the attached position of the inner wall of the porcelain shell and the heat-conducting silica gel layer, a movable contact is arranged on the movable conducting rod, a static contact is arranged on the static conducting rod, and plating layers containing indium are plated on the corresponding end surfaces of the movable contact and the static contact.

Description

Vacuum arc-extinguishing chamber for circuit breaker

Technical Field

The utility model belongs to the technical field of vacuum arc-extinguishing chambers, and particularly relates to a vacuum arc-extinguishing chamber for a circuit breaker.

Background

The vacuum arc-extinguishing chamber, also called vacuum switch tube, is a core component of the medium-high voltage power switch, and has the main functions of enabling the medium-high voltage power switch to quickly extinguish arc and inhibit current after the power supply is cut off through the excellent insulativity of the vacuum in the tube, avoiding accidents and accidents, being mainly applied to a power transmission and distribution control system of electric power, and has the characteristics of energy conservation, material saving, fire prevention, explosion prevention, small volume, long service life, low maintenance cost, reliable operation, no pollution and the like.

But current vacuum interrupter for outdoor circuit breaker still exists the weak point, and outdoor vacuum interrupter is because long-time exposing outside, directly receives sunshine and shines and can lead to the inside high temperature of explosion chamber, but current vacuum interrupter's heat radiation structure can't carry out timely cooling completely, leads to the inside components and parts of explosion chamber fragile, and then influences its arc extinguishing effect, and moving contact and stationary contact use easily to appear pulling arc adhesion phenomenon under high temperature for a long time, leads to the ability of breaking to the vacuum interrupter and produces the influence.

Disclosure of Invention

The utility model aims to provide a vacuum arc-extinguishing chamber for a circuit breaker, which solves the problems that the heat dissipation performance of the existing vacuum arc-extinguishing chamber provided in the background art is insufficient, and the breaking capacity of the vacuum arc-extinguishing chamber is affected due to the phenomenon that a moving contact and a fixed contact are adhered during long-time use at high temperature.

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 porcelain shell, movable cover plate, quiet apron, moves conducting rod, quiet conducting rod, movable cover plate and quiet apron install respectively in porcelain shell both ends, be equipped with the uide bushing on the movable cover plate, closely the laminating is equipped with the heat conduction silica gel layer on the porcelain shell inner wall, a plurality of heat absorption recesses have been seted up to porcelain shell inner wall and heat conduction silica gel layer laminating department, be equipped with the moving contact on the movable conducting rod, be equipped with the static contact on the quiet conducting rod, the cladding material that contains indium element has all been plated to the corresponding terminal surface of moving contact and static contact.

Preferably, the static conductive rod is mounted on the static cover plate, the movable conductive rod passes through the movable cover plate and the guide sleeve to enable the movable contact to correspond to the static contact, a corrugated pipe shielding cover is arranged at one end, close to the movable contact, of the movable conductive rod, and a corrugated pipe is arranged between the corrugated pipe shielding cover and the movable cover plate.

Preferably, a shielding cylinder is arranged in the porcelain shell, and the shielding cylinder is sleeved outside the movable conducting rod and the static conducting rod.

Advantageous effects

1. According to the utility model, the movable cover plate and the static cover plate are respectively arranged at two ends of the porcelain shell, the movable cover plate is provided with the guide sleeve, the inner wall of the porcelain shell is closely attached with the heat-conducting silica gel layer, the attached part of the inner wall of the porcelain shell and the heat-conducting silica gel layer is provided with the plurality of heat absorption grooves, and the heat absorption grooves and the heat-conducting silica gel layer can take away more heat, so that the heat dissipation speed and efficiency are improved, the vacuum arc-extinguishing chamber is rapidly cooled, and further the overheat damage of components is prevented.

2. According to the utility model, the movable contact is arranged on the movable conductive rod, the fixed contact is arranged on the fixed conductive rod, the corresponding end surfaces of the movable contact and the fixed contact are plated with the indium-containing plating layers, and the indium-containing plating layers can effectively reduce the contact resistance of the contact surface, so that the contact temperature is reduced, the loss degree of the contact is reduced, the arcing adhesion phenomenon caused by the overhigh contact temperature is avoided, and further the influence on the breaking capacity of the vacuum arc extinguishing chamber is avoided.

Drawings

FIG. 1 is a schematic view of a front view in cross section;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

the correspondence between the reference numerals and the component names in the drawings is as follows:

1. a porcelain shell; 2. a movable cover plate; 3. a static cover plate; 4. a movable conductive rod; 5. a static conductive rod; 6. a guide sleeve; 7. a thermally conductive silicone layer; 8. a heat absorbing groove; 9. a moving contact; 10. a stationary contact; 11. plating; 12. a bellows shield; 13. a bellows; 14. a shielding cylinder.

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.

Fig. 1-2 are schematic structural views of a vacuum interrupter for circuit breaker according to a preferred embodiment of the present utility model;

in this embodiment, a vacuum interrupter for circuit breaker, including porcelain shell 1, movable cover plate 2, static cover plate 3, movable conducting rod 4, static conducting rod 5, movable cover plate 2 and static cover plate 3 respectively fixed mounting in porcelain shell 1 both ends, be equipped with uide bushing 6 on the movable cover plate 2, closely the laminating is equipped with heat conduction silica gel layer 7 on the porcelain shell 1 inner wall, heat conduction silica gel layer 7 can lead out the interior heat of explosion chamber, a plurality of heat absorption recesses 8 have been seted up in porcelain shell 1 inner wall and heat conduction silica gel layer 7 laminating department, heat absorption recess 8 can increase the heat absorption area, makes the heat scatter fast, be equipped with movable contact 9 on the movable conducting rod 4, be equipped with static contact 10 on the static conducting rod 5, the corresponding terminal surface of movable contact 9 and static contact 10 all plates the cladding material 11 that contains the indium element, the contact surface resistance can effectively be reduced to the contact temperature reduces the loss degree of contact, has reduced the contact temperature and has avoided the high temperature to produce the phenomenon of drawing the adhesion.

In this embodiment, the static conductive rod 5 is fixedly installed on the static cover plate 3, the moving conductive rod 4 passes through the moving cover plate 2 and the guide sleeve 6 to enable the moving contact 9 to correspond to the static contact 10, a bellows shielding cover 12 is arranged at one end, close to the moving contact 9, of the moving conductive rod 4, a bellows 13 is arranged between the bellows shielding cover 12 and the moving cover plate 2, the bellows 13 is mainly responsible for guaranteeing the moving electrode to move in a certain range and keep high vacuum for a long time, the vacuum arc extinguishing chamber is guaranteed to have very high mechanical life, a shielding cylinder 14 is arranged inside the porcelain shell 1, and the shielding cylinder 14 is sleeved outside the moving conductive rod 4 and the static conductive rod 5.

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

1. The utility model provides a vacuum interrupter for circuit breaker, includes porcelain shell (1), moves apron (2), quiet apron (3), moves conducting rod (4), quiet conducting rod (5), its characterized in that: the ceramic shell comprises a ceramic shell body and is characterized in that a movable cover plate (2) and a static cover plate (3) are respectively arranged at two ends of the ceramic shell body (1), a guide sleeve (6) is arranged on the movable cover plate (2), a heat conducting silica gel layer (7) is tightly attached to the inner wall of the ceramic shell body (1), a plurality of heat absorbing grooves (8) are formed in the attaching position of the inner wall of the ceramic shell body (1) and the heat conducting silica gel layer (7), a movable contact (9) is arranged on a movable conductive rod (4), a static contact (10) is arranged on the static conductive rod (5), and a plating layer (11) containing indium elements is plated on the corresponding end faces of the movable contact (9) and the static contact (10).

2. The vacuum interrupter for circuit breakers of claim 1, wherein: the static conducting rod (5) is installed on the static cover plate (3), the movable conducting rod (4) penetrates through the movable cover plate (2) and the guide sleeve (6) to enable the movable contact (9) to correspond to the static contact (10), a corrugated pipe shielding cover (12) is arranged at one end, close to the movable contact (9), of the movable conducting rod (4), and a corrugated pipe (13) is arranged between the corrugated pipe shielding cover (12) and the movable cover plate (2).

3. The vacuum interrupter for circuit breakers of claim 1, wherein: the porcelain shell (1) is internally provided with a shielding cylinder (14), and the shielding cylinder (14) is sleeved outside the movable conducting rod (4) and the static conducting rod (5).