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CN-224204032-U - Insulation pull rod for reducing bouncing of vacuum circuit breaker contact

CN224204032UCN 224204032 UCN224204032 UCN 224204032UCN-224204032-U

Abstract

The insulation pull rod for reducing the bouncing of the contact of the vacuum circuit breaker comprises an insulation body, wherein a first metal sleeve and a second metal sleeve are respectively embedded at two ends of the insulation body, damping particles are filled in the first metal sleeve, the damping particles are packaged in the first metal sleeve through a first compression ring, a first connecting rod is fixedly connected to the center of the first compression ring, a spring is sleeved in the second metal sleeve, a second connecting rod is arranged in the second metal sleeve in a sleeved mode through the second compression ring in a compressed mode, and the upper portion of the second connecting rod abuts against the top portion and the lower portion of the spring and stretches into an inner cavity of the spring. According to the utility model, the damping particles filled at the lower end of the insulating pull rod absorb and disperse the rebound force of the contact moment of the moving contact, so that the rebound of the moving contact is restrained, and the rebound of the contact of the vacuum circuit breaker is reduced.

Inventors

  • TANG NAILI
  • YAO XIAOBIN
  • LI HAITAO

Assignees

  • 陕西亿能智联开关电器科技有限公司

Dates

Publication Date
20260505
Application Date
20250528

Claims (6)

  1. 1. The insulation pull rod for reducing bouncing of the vacuum circuit breaker contact comprises an insulation body (1) and is characterized in that a first metal sleeve (2) and a second metal sleeve (3) are embedded at two ends of the insulation body (1) respectively, damping particles (4) are filled in the first metal sleeve (2), the damping particles (4) are packaged in the first metal sleeve (2) through a first compression ring (5), a first connecting rod (6) is fixedly connected to the center of the first compression ring (5), a spring (7) is sleeved in the second metal sleeve (3), a second connecting rod (8) is pressed through the second compression ring (9), and the upper portion of the second connecting rod (8) abuts against the top portion and the lower portion of the spring (7) and stretches into an inner cavity of the spring (7).
  2. 2. The insulating pull rod for reducing contact bounce of a vacuum circuit breaker according to claim 1, wherein the filling amount of the damping particles (4) is 1/2-1/3 of the volume of the metal sleeve I (2).
  3. 3. The insulating pull rod for reducing contact bounce of vacuum circuit breaker according to claim 2, characterized in that the damping particles (4) are crushed iron pieces or small iron beads.
  4. 4. The insulation pull rod for reducing contact bounce of the vacuum circuit breaker according to claim 1, wherein the inner end of the first connecting rod (6) extends to the top of the first metal sleeve (2) and is fixedly connected with the top of the first metal sleeve (2).
  5. 5. The insulating pull rod for reducing contact bounce of vacuum circuit breaker according to claim 1, 2, 3 or 4, wherein the first compression ring (5) is sleeved on the first connecting rod (6) and is fixed into a whole after being connected with the first metal sleeve (2) in a threaded manner.
  6. 6. The insulation pull rod for reducing contact bounce of the vacuum circuit breaker according to claim 1, wherein an annular boss (8-1) is arranged on the periphery of the upper portion of the second connecting rod (8), a second pressing ring (9) is sleeved above the annular boss (8-1), the lower end of the second connecting rod (8) is pressed in the second metal sleeve (3) through threaded connection of the second pressing ring (9) and the second metal sleeve (3), and the lower end of the annular boss (8-1) is abutted against the top of the spring (7).

Description

Insulation pull rod for reducing bouncing of vacuum circuit breaker contact Technical Field The utility model belongs to the technical field of circuit breakers, and particularly relates to an insulating pull rod for reducing bouncing of a contact of a vacuum circuit breaker. Background An insulating pull rod (also called an insulating operating rod and an insulating connecting rod) in the vacuum circuit breaker is one of core transmission parts and is mainly responsible for transmitting switching on/off power between a mechanical operating mechanism and a vacuum arc-extinguishing chamber, and meanwhile, the electric insulation between a high-voltage electrified part and the operating mechanism is ensured. In the prior art, in order to inhibit the bouncing phenomenon (namely, multiple collisions at the moment of contact) when the contact is closed, the bouncing is mostly inhibited by arranging a contact spring on an insulating pull rod, and the contact spring can continuously apply acting force to a moving contact after the moving contact is contacted with the moving contact, so that the moving contact has larger contact pressure, and the bouncing of the moving contact during closing is reduced. The specific principle is that when the movable contact is sprung out, the contact spring is compressed, if the repulsive force is smaller than the contact spring force, the movable contact cannot be sprung out, and if the repulsive force is larger than the contact spring force, the movable contact can be sprung out. So by increasing the contact spring force, bouncing can be suppressed. The magnitude of the contact spring force is determined according to the electromotive force of the dynamic stabilization current of the circuit breaker. To suppress bouncing, it is not reasonable to increase the contact spring force. The device can bring the following adverse effects that 1) switching-on energy is increased to enlarge an operating mechanism, 2) impact of switching-on and switching-off actions of the mechanism is increased to influence the service life and reliability of the operating mechanism, and 3) impact on an arc-extinguishing chamber is increased to influence the service life and reliability of the arc-extinguishing chamber. Disclosure of Invention The utility model provides an insulating pull rod for reducing bouncing of a contact of a vacuum circuit breaker, which aims to overcome the defects in the prior art. The technical scheme includes that the insulation pull rod for reducing bouncing of the contact of the vacuum circuit breaker comprises an insulation body, wherein a first metal sleeve and a second metal sleeve are respectively embedded at two ends of the insulation body, damping particles are filled in the first metal sleeve and are packaged in the first metal sleeve through a first compression ring, a first connecting rod is fixedly connected to the center of the first compression ring, a spring is sleeved in the second metal sleeve, a second connecting rod is arranged in the second metal sleeve in a sleeved mode through a second compression ring in a compressed mode, and the upper portion of the second connecting rod abuts against the top portion and the lower portion of the spring and stretches into an inner cavity of the spring. The filling amount of the damping particles is 1/2-1/3 of the volume of the metal sleeve. The damping particles are crushed iron sheets or small iron beads. The connecting rod extends to the top of the metal sleeve at one inner end and is fixedly connected with the top of the metal sleeve. The first compression ring is sleeved on the first connecting rod and is in threaded connection with the first metal sleeve and then fixed into a whole. The periphery of the upper part of the second connecting rod is provided with an annular boss, a second compression ring is sleeved above the annular boss, the lower end of the second connecting rod is pressed in the second metal sleeve through threaded connection of the second compression ring and the second metal sleeve, and the lower end of the annular boss is abutted to the top of the spring. Compared with the prior art, the utility model has the following beneficial effects: 1. According to the utility model, the damping particles filled at the lower end of the insulating pull rod absorb and disperse the rebound force of the contact moment of the moving contact, so that the rebound of the moving contact is restrained, and the rebound of the contact of the vacuum circuit breaker is reduced. 2. The damping particles can reduce the excessive impact of the moving contact on the static contact at the moment of contact of the moving contact and the static contact, thereby protecting the smooth and flat surface of the moving contact and ensuring low contact resistance and stable current carrying capacity. Drawings FIG. 1 is a schematic cross-sectional view of the structure of the present utility model. Detailed Description The utility mode