CN220873474U

CN220873474U - High-voltage vacuum circuit breaker for power plant

Info

Publication number: CN220873474U
Application number: CN202322398402.9U
Authority: CN
Inventors: 郭晓旸; 袁锦辉
Original assignee: Jiangsu Huadian Qishuyan Power Generation Co ltd
Current assignee: Jiangsu Huadian Qishuyan Power Generation Co ltd
Priority date: 2023-09-05
Filing date: 2023-09-05
Publication date: 2024-04-30
Anticipated expiration: 2033-09-05

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a high-voltage vacuum circuit breaker for a power plant. The vacuum arc extinguishing chamber is arranged at the bottom in the shell, a fixed contact is fixedly arranged at the bottom in the vacuum arc extinguishing chamber, a moving contact matched with the fixed contact is also inserted at the top of the vacuum arc extinguishing chamber in a sliding manner, a driving mechanism fixedly connected with the top end of the moving contact is fixedly arranged at the top of the shell, buffer components are respectively arranged at two sides of the moving contact in the shell, and each buffer component comprises a buffer seat fixedly arranged on the inner wall of the shell. According to the utility model, the buffer assembly is arranged in the shell, and in the process that the driving mechanism drives the moving contact to move towards the fixed contact until the moving contact is propped against the fixed contact, especially when the moving contact is in contact with the fixed contact quickly, the buffer support plates on two sides of the moving contact can be subjected to the tensile force of the buffer spring to slow down the impact force of the moving contact and prevent the fixed contact from being damaged due to larger impact.

Description

High-voltage vacuum circuit breaker for power plant

Technical Field

The utility model relates to a circuit breaker, in particular to a high-voltage vacuum circuit breaker for a power plant.

Background

Vacuum circuit breakers are known for their high vacuum in both the quenching medium and the insulating medium of the contact gap after quenching. The device has the advantages of small volume, light weight, suitability for frequent operation and no maintenance for arc extinction, and is more popular in power distribution networks. The vacuum circuit breaker is an indoor distribution device in a 3-10 kV 50Hz three-phase alternating current system, can be used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants and substations, is particularly suitable for use places requiring oilless maintenance and frequent operation, and can be arranged in a centrally installed switchgear, a double-layer cabinet and a fixed cabinet to be used for controlling and protecting high-voltage electrical equipment.

Because the buffer mechanism is not arranged in the existing vacuum circuit breaker, the moving contact is directly contacted with the fixed contact in the process of being driven by the power mechanism, and the problem that the fixed contact is easily damaged due to larger impact exists.

Disclosure of utility model

The utility model aims to solve the defects and provides a high-voltage vacuum circuit breaker for a power plant.

In order to overcome the defects in the background art, the technical scheme adopted by the utility model for solving the technical problems is as follows: the high-voltage vacuum circuit breaker for the power plant comprises a shell and a vacuum arc-extinguishing chamber arranged at the inner bottom of the shell, wherein a fixed contact is fixedly arranged at the bottom of the vacuum arc-extinguishing chamber, a moving contact matched with the fixed contact for use is also inserted at the top of the vacuum arc-extinguishing chamber in a sliding manner, buffer components are respectively arranged at two sides of the moving contact in a driving mechanism shell fixedly connected with the top end of the moving contact, the buffer components comprise buffer seats fixedly arranged on the inner wall of the shell, buffer support plates propped against the buffer seats are respectively fixedly arranged at two sides of the moving contact, a support column fixedly connected with the buffer support plates is inserted at the top of the buffer seats in a sliding manner, a buffer spring is sleeved at the periphery of the support column, and the top and the bottom of the buffer spring are respectively fixedly connected with the inner top wall of the buffer seat and the top of the buffer support plates.

According to another embodiment of the present utility model, the two sets of buffer seats and the buffer support plates are symmetrically arranged with the moving contact as a symmetry axis.

According to another embodiment of the utility model, the buffer seat is in a shape of a C, and the upper end plate of the buffer seat is fixedly connected with the support column.

According to another embodiment of the utility model, the vacuum arc extinguishing chamber further comprises heat dissipation components respectively arranged at two sides of the vacuum arc extinguishing chamber in the shell.

According to another embodiment of the utility model, the heat dissipation assembly further comprises a heat dissipation seat fixedly arranged between the vacuum arc extinguishing chamber and the inner wall of the shell, a plurality of groups of heat dissipation fins which are propped against the inner wall of the shell are horizontally arranged in the heat dissipation seat at equal intervals, and a plurality of heat dissipation ventilation holes are formed at positions, corresponding to gaps among the heat dissipation fins, of two sides of the shell.

The beneficial effects of the utility model are as follows:

1. Through being equipped with buffer unit in the casing, at the in-process that actuating mechanism drive moving contact moved to the static contact until the counterbalance, especially when moving contact is fast with the static contact, the buffering extension board of moving contact both sides can receive buffer spring's pulling force and slow down the impact force with the static contact to prevent that the impact is great to cause the damage to the static contact.

2. The heat radiating components are arranged on the two sides of the vacuum arc-extinguishing chamber, the heat radiating seat is fixedly connected with the outer wall of the vacuum arc-extinguishing chamber, so that heat of the vacuum arc-extinguishing chamber is transmitted to the heat radiating fins in the heat radiating seat, the heat transmission area is increased to play a role in radiating, a plurality of heat radiating ventilation holes are further formed in the positions, corresponding to gaps between the heat radiating fins, of the two sides of the shell, external air can enter, the purpose of heat exchange between the internal air and the external air is achieved, and the heat radiating effect is further improved.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a front view of the overall structure of the present utility model in cross section;

FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with the present utility model;

fig. 3 is a side view of a heat sink structure according to the present utility model.

Wherein: 10-a housing; 101-a heat dissipation vent; 20-a vacuum arc extinguishing chamber; 30-a fixed contact; 40-moving contact; 401-a drive mechanism; 402-buffering support plate; 50-a buffer seat; 501-supporting columns; 502-a buffer spring; 60-a heat dissipation seat; 601-heat radiating fins.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. Embodiments of the utility model are described herein in terms of various specific embodiments, including those that are apparent to those of ordinary skill in the art and all that come within the scope of the utility model.

As shown in fig. 1 and 2, the vacuum interrupter comprises a housing 10, and a vacuum interrupter 20 arranged at the inner bottom of the housing 10, wherein a fixed contact 30 is fixedly arranged at the bottom in the vacuum interrupter 20, a moving contact 40 matched with the fixed contact 30 is slidably inserted at the top of the vacuum interrupter 20, a driving mechanism 401 fixedly connected with the top end of the moving contact 40 is fixedly arranged at the top of the housing 10, buffer components are respectively arranged at two sides of the moving contact 40 in the housing 10, each buffer component comprises a buffer seat 50 fixedly arranged on the inner wall of the housing 10, buffer support plates 402 propped against the buffer seats 50 are respectively fixedly arranged at two sides of the moving contact 40, a strut 501 fixedly connected with the buffer support plates 402 is slidably inserted at the top in the buffer seats 50, a buffer spring 502 is sleeved on the periphery of the strut 501, and the top and the bottom of the buffer spring 502 are respectively fixedly connected with the inner top wall of the buffer seat 50 and the top of the buffer support plates 402. Through being equipped with the buffer assembly in casing 10, at the drive mechanism 401 drive moving contact 40 to the fixed contact 30 in the in-process that offsets, especially when moving contact 40 is fast with fixed contact 30, the impact force with the fixed contact can be slowed down to the buffering extension board 402 of moving contact 40 both sides receive buffer spring 502 to prevent that the impact is great to cause the damage to fixed contact 30.

The buffer assembly is one of a telescopic stepper motor or a cylinder, and is capable of powering the movement of the moving contact 40.

The two groups of buffer seats 50 and the buffer support plates 402 are symmetrically arranged by taking the movable contact 40 as a symmetry axis, so that the buffer effect can be further improved.

The two groups of buffer seats 50 and buffer support plates 402 are symmetrically arranged by taking the movable contact 40 as a symmetry axis.

The buffer seat 50 is C-shaped, and the upper end plate is fixedly connected with a pillar 501.

The heat dissipation components are respectively disposed on two sides of the vacuum arc-extinguishing chamber 20 in the housing 10, and fig. 3 is a side view of the heat dissipation seat structure in the present utility model.

The heat dissipation assembly comprises a heat dissipation seat 60 fixedly arranged between the vacuum arc extinguishing chamber 20 and the inner wall of the shell 10, a plurality of groups of heat dissipation fins 601 propped against the inner wall of the shell 10 are horizontally arranged in the heat dissipation seat 60 at equal intervals, and a plurality of heat dissipation ventilation holes 101 are formed in the two sides of the shell 10 corresponding to the positions of gaps between the heat dissipation fins 601.

Through being equipped with the radiator unit in vacuum interrupter 20 both sides, utilize the outer wall fixed connection of heat dissipation seat 60 and vacuum interrupter 20, can make the heat transfer of vacuum interrupter 20 give the radiating fin 601 in the heat dissipation seat 60 to increase the heat transfer area and play radiating effect, and still offered a plurality of cooling ventilation holes 101 in the both sides of casing 10 and correspond the position in gap between the radiating fin 601, can make the outside air get into, thereby play inside and outside air heat transfer's purpose, further improve radiating effect.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a high-voltage vacuum circuit breaker for power plant, includes casing (10) to and establish vacuum interrupter (20) of bottom in casing (10), the fixed stationary contact (30) that is equipped with in the bottom in vacuum interrupter (20), the top of vacuum interrupter (20) still slides and peg graft have with stationary contact (30) supporting moving contact (40) that use, the fixed actuating mechanism (401) that are equipped with in top and moving contact (40) top fixed connection of top of casing (10), its characterized in that: the utility model discloses a movable contact, including casing (10), be located both sides of moving contact (40) and be equipped with buffer assembly respectively, buffer assembly is including fixed buffer seat (50) of establishing at casing (10) inner wall, the both sides of moving contact (40) are fixed respectively and are equipped with buffer extension board (402) that offset with buffer seat (50), top slip grafting in buffer seat (50) has pillar (501) with buffer extension board (402) fixed connection, and the periphery cover of pillar (501) is equipped with buffer spring (502), the top and the bottom of buffer spring (502) are respectively with the top fixed connection of inner roof and buffer extension board (402) of buffer seat (50).

2. A high voltage vacuum circuit breaker for power plants as claimed in claim 1, characterized in that: the two groups of buffer seats (50) and the buffer support plates (402) are symmetrically arranged by taking the movable contact (40) as a symmetry axis.

3. A high voltage vacuum circuit breaker for power plants as claimed in claim 1, characterized in that: the buffer seat (50) is C-shaped, and a pillar (501) is fixedly connected to the upper end plate of the buffer seat.

4. A high voltage vacuum circuit breaker for power plants as claimed in claim 1, characterized in that: and heat dissipation components are respectively arranged on two sides of the vacuum arc extinguishing chamber (20) in the shell (10).

5. The high voltage vacuum circuit breaker for power plant of claim 4, wherein: the heat dissipation assembly comprises a heat dissipation seat (60) fixedly arranged between the vacuum arc extinguishing chamber (20) and the inner wall of the shell (10), a plurality of groups of heat dissipation fins (601) propped against the inner wall of the shell (10) are horizontally arranged in the heat dissipation seat (60) at equal intervals, and a plurality of heat dissipation ventilation holes (101) are further formed in positions, corresponding to gaps among the heat dissipation fins (601), of two sides of the shell (10).