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CN-224232595-U - Anti-breakdown vacuum arc-extinguishing chamber

CN224232595UCN 224232595 UCN224232595 UCN 224232595UCN-224232595-U

Abstract

The utility model discloses an anti-breakdown vacuum arc-extinguishing chamber, which belongs to the technical field of power switches and comprises an arc-extinguishing chamber cavity, wherein a static conductive rod is arranged at the top end of the arc-extinguishing chamber cavity, a movable conductive rod is arranged at the bottom end of the arc-extinguishing chamber cavity, a static contact is arranged at one end of the static conductive rod, which is positioned in the arc-extinguishing chamber cavity, and a movable contact is arranged at one end of the movable conductive rod, which is positioned in the arc-extinguishing chamber cavity.

Inventors

  • GE WEISHAN
  • YAO XIAOBIN
  • LI HAITAO

Assignees

  • 陕西宝光真空电器股份有限公司

Dates

Publication Date
20260512
Application Date
20250417

Claims (10)

  1. 1. The anti-breakdown vacuum arc-extinguishing chamber comprises an arc-extinguishing chamber cavity (1) and is characterized in that a static conducting rod (4) is arranged at the upper part in the arc-extinguishing chamber cavity (1), a movable conducting rod (6) is arranged at the bottom, a static contact (42) is arranged at one end of the static conducting rod (4) positioned in the arc-extinguishing chamber cavity (1), a movable contact (62) is arranged at one end of the movable conducting rod (6) positioned in the arc-extinguishing chamber cavity (1), the static contact (42) and the movable contact (62) are identical in structure and comprise a cylindrical part and a round table part which are fixedly connected, the round table part of the static contact (42) and the round table part of the movable contact (62) are oppositely arranged, and a plurality of heat dissipation ribs (7) are arranged on the outer wall surfaces of the static contact (42) and the movable contact (62).
  2. 2. The breakdown preventing vacuum interrupter as set forth in claim 1, wherein the outer surfaces of the stationary contact (42) and the moving contact (62) are coated with an arc suppressing coating.
  3. 3. The anti-breakdown vacuum arc-extinguishing chamber according to claim 1, wherein the fixed contact (42) and the moving contact (62) are made of silver-nickel alloy.
  4. 4. The breakdown preventing vacuum interrupter as set forth in claim 1, wherein the round table portion of the stationary contact (42) and the round table portion edge portion of the moving contact (62) have chamfers.
  5. 5. The anti-breakdown vacuum arc-extinguishing chamber according to claim 1, wherein the arc-extinguishing chamber cavity (1) comprises a cavity shell (2), and a plurality of annular grooves (21) distributed at equal intervals are formed in the surface of the cavity shell (2).
  6. 6. A breakdown preventing vacuum interrupter as defined in claim 5, wherein the annular groove (21) is L-shaped in cross section.
  7. 7. The anti-breakdown vacuum arc-extinguishing chamber according to claim 1, wherein one end of the static conductive rod (4) positioned outside the arc-extinguishing chamber cavity (1) is provided with a static conductive head (41), and the top of the arc-extinguishing chamber cavity (1) is provided with a static cover plate (3).
  8. 8. The anti-breakdown vacuum arc-extinguishing chamber according to claim 7, wherein one end of the movable conducting rod (6) located outside the arc-extinguishing chamber cavity (1) is provided with a movable conducting head (61), the bottom of the arc-extinguishing chamber cavity (1) is provided with a movable cover plate (5), and the arc-extinguishing chamber cavity (1) is composed of a cavity shell (2), a static cover plate (3) and the movable cover plate (5).
  9. 9. The anti-breakdown vacuum arc-extinguishing chamber according to claim 8, wherein the chamber housing (2) is made of ceramic material.
  10. 10. The anti-breakdown vacuum interrupter according to claim 8, wherein the static conductive head (41), the static conductive rod (4), the movable conductive head (61) and the movable conductive rod (6) are made of copper and chromium.

Description

Anti-breakdown vacuum arc-extinguishing chamber Technical Field The utility model relates to the technical field of power switches, in particular to an anti-breakdown vacuum arc-extinguishing chamber. Background The vacuum arc-extinguishing chamber (Vacuum Interrupter), also called vacuum switch tube, is the core component of the medium-high voltage power switch, and the technical performance of the vacuum arc-extinguishing chamber directly affects the safety and reliability of the power system. The device is based on the excellent insulating property and arc extinguishing property of a high-vacuum medium, and is a preferred arc extinguishing solution for a 12-40.5kV voltage class power system. The main function of the high-voltage power supply is that the high-voltage power supply can be quickly extinguished and the current can be restrained after the power supply is cut off through the excellent insulating property of the vacuum in the pipe, so that accidents and accidents are avoided. 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. However, in the process of using the vacuum interrupter for a long time, the metal vapor or the contact generated after the voltage is applied releases the adsorbed gas, which causes the breakdown phenomenon, thereby affecting the normal use. Disclosure of utility model The utility model aims to solve the problem that the normal use is affected due to breakdown phenomenon caused by the fact that metal steam or contacts generated after voltage is applied release adsorbed gas in the long-term use process of a vacuum arc-extinguishing chamber. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The utility model provides a prevent breaking down vacuum explosion chamber, includes explosion chamber cavity, explosion chamber cavity upper portion is equipped with the static conducting rod, and the bottom is equipped with the movable conducting rod, the static conducting rod is located the inside one end of explosion chamber cavity and is equipped with the static contact, the movable conducting rod is located the inside one end of explosion chamber cavity and is equipped with the moving contact, the structure of static contact and moving contact is the same, all includes fixed connection's cylinder portion and round platform portion, the round platform portion of static contact and the round platform portion of moving contact set up relatively, the outer wall surface of static contact and moving contact all is provided with a plurality of heat dissipation ribs. Further, the outer surfaces of the fixed contact and the moving contact are coated with arc suppression coatings. Furthermore, the fixed contact and the moving contact are made of silver-nickel alloy. Further, the round platform part of the fixed contact and the round platform part edge part of the movable contact are provided with chamfers. Further, the arc extinguishing chamber cavity comprises a cavity shell, and a plurality of annular grooves distributed at equal intervals are formed in the surface of the cavity shell. Further, the cross section of the annular groove is L-shaped. Further, one end of the static conductive rod, which is positioned outside the arc extinguish chamber cavity, is provided with a static conductive head, and the top of the arc extinguish chamber cavity is provided with a static cover plate. Further, one end of the movable conducting rod, which is positioned outside the arc-extinguishing chamber cavity, is provided with a movable conducting head, the bottom of the arc-extinguishing chamber cavity is provided with a movable cover plate, and the arc-extinguishing chamber cavity is composed of a cavity shell, a static cover plate and a movable cover plate. Furthermore, the cavity shell is made of ceramic materials. Further, the static conductive head, the static conductive rod, the movable conductive head and the movable conductive rod are all made of copper and chromium. Compared with the prior art, the utility model has the beneficial effects that: The static contact and the moving contact are combined in the shape of a cylinder and a cone, so that the contact area can be enlarged, the electric field distribution of the contact during use is improved, the electric field distribution is more uniform, the electric field is gradually changed, the abrupt increase of the electric field is avoided, the gradual change of the static contact and the moving contact is beneficial to the smooth distribution of the electric field, the breakdown probability is greatly reduced, and the voltage-resistant performance is improved. Further, through the heat dissipation ribs arranged on the outer surfaces of the fixed contact and the movable contact, the temperature of the contact can be effectively reduced, heat fading is re