CN210156307U

CN210156307U - Intelligent vacuum circuit breaker

Info

Publication number: CN210156307U
Application number: CN201921331353.4U
Authority: CN
Inventors: 曹益宁
Original assignee: BAOJI XIGAO ELECTRICAL TECHNOLOGY Co Ltd
Current assignee: BAOJI XIGAO ELECTRICAL TECHNOLOGY Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-03-17
Anticipated expiration: 2029-08-15

Abstract

The utility model provides an intelligence vacuum circuit breaker. The intelligent vacuum circuit breaker is internally provided with a temperature control device with an accommodating space and a vacuum arc-extinguishing chamber assembly accommodated in the accommodating space; the vacuum arc extinguish chamber component comprises a moving contact and a fixed contact which are coaxial, and a corrugated pipe which is arranged at the end part of the moving contact far away from the fixed contact, wherein the moving contact is a superconducting contact, and the corrugated pipe supports the moving contact to move relative to the fixed contact so as to realize the closing and the opening of the vacuum arc extinguish chamber, namely the closing and the opening of the vacuum circuit breaker. The utility model provides an intelligence vacuum circuit breaker moving contact has increased superconducting material, utilizes superconducting material's characteristic, and the application temperature control superconducting material controls the opening and shutting of vacuum interrupter, the utility model discloses simple structure, the simple operation thoroughly changes vacuum interrupter's control mode.

Description

Intelligent vacuum circuit breaker

Technical Field

The invention relates to the field of vacuum circuit breakers, in particular to an intelligent vacuum circuit breaker.

Background

The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; the arc extinguishing device has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinguishing, and is relatively popularized in power distribution networks. The vacuum circuit breaker is an indoor power distribution device in a 3-10 kV and 50Hz three-phase alternating-current system, can be used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants and transformer substations, is particularly suitable for use places requiring no oil, less maintenance and frequent operation, and can be arranged in a middle cabinet, a double-layer cabinet and a fixed cabinet to be used for controlling and protecting high-voltage electrical equipment.

The working principle of a common vacuum circuit breaker is as follows: when the moving contact and the static contact are switched off under the action of the operating mechanism, electric arcs are generated between the contacts, steam is volatilized from the surfaces of the contacts at high temperature, a magnetic field is generated when current passes through the contacts due to the special shape of the contacts, the electric arcs rapidly move along the tangential direction of the surfaces of the contacts under the action of the magnetic field, partial metal steam is condensed on the metal cylinder (shielding cover), the electric arcs are extinguished when the electric arcs naturally pass through zero, and the medium strength between the contacts is rapidly recovered.

The existing vacuum circuit breaker is a complex mechanical transmission mechanism with nearly 300 parts, please refer to fig. 1, which is a structure diagram of the existing vacuum circuit breaker, wherein, 1-insulator, 2-upper outlet terminal, 3-lower outlet terminal, 4-flexible connection, 5-conductive clamp, 6-universal rod end bearing, 7-shaft pin, 8-lever, 9-main shaft, 10-insulation pull rod, 11-mechanism box, 12-vacuum arc extinguish chamber, and 13-contact spring.

Therefore, it is necessary to provide an intelligent vacuum circuit breaker to solve the above technical problems.

Disclosure of Invention

The present invention provides an intelligent vacuum circuit breaker that solves the above technical problems.

In order to solve the technical problem, the intelligent vacuum circuit breaker provided by the invention comprises a temperature control device with an accommodating space inside, and a vacuum arc-extinguishing chamber assembly accommodated in the accommodating space; the vacuum arc extinguish chamber component comprises a moving contact and a fixed contact which are coaxial, and a corrugated pipe which is arranged at the end part of the moving contact far away from the fixed contact, wherein the moving contact is a superconducting contact, and the corrugated pipe supports the moving contact to move relative to the fixed contact so as to realize the closing and the opening of the vacuum arc extinguish chamber, namely the closing and the opening of the vacuum circuit breaker.

Preferably, the moving contact is made of a material of a different electric material and a material of a superconducting element.

Preferably, the heteroelectric material is copper, cadmium or an added rare alloy.

Preferably, the superconducting element is niobium or lead.

Preferably, a spring is arranged in the corrugated pipe.

Preferably, the vacuum arc extinguish chamber assembly further comprises an insulating housing for accommodating the moving contact and the static contact, a static end cover plate arranged at one end of the static contact, a dynamic end cover plate arranged at one end of the moving contact and accommodated in the insulating housing, a main shielding cover arranged on the inner wall of the insulating housing and annularly arranged on the moving contact and the static contact, a static conducting rod accommodated in the insulating housing and electrically connected with the static contact, and a dynamic conducting rod arranged on one side of the moving contact and electrically connected with the moving contact and arranged on the dynamic end cover plate.

Preferably, the temperature control device is a small refrigeration device with the temperature of 150 ℃ below zero to 250 ℃ below zero.

Preferably, the refrigeration equipment comprises a cascade compressor, a microcomputer intelligent electronic temperature controller, a digital temperature regulating and controlling device and an overtemperature alarm.

Preferably, the rare alloy is yttrium barium copper composite metal.

Compared with the prior art, the intelligent vacuum circuit breaker moving contact provided by the invention has the advantages that the superconducting material is added, the superconducting material is utilized to control the opening and closing of the vacuum arc extinguish chamber by controlling the superconducting material through temperature, the utility model discloses simple structure, the operation is convenient, and the control mode of the vacuum arc extinguish chamber is thoroughly changed.

Drawings

Fig. 1 is a schematic structural view of a conventional vacuum circuit breaker;

fig. 2 is a schematic structural diagram of a closed state of the intelligent vacuum circuit breaker provided by the present invention;

fig. 3 is a schematic structural diagram of an open state of the intelligent vacuum circuit breaker according to the present invention.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 2 and fig. 3 in combination, fig. 2 is a schematic structural diagram of a closed state of the intelligent vacuum circuit breaker according to the present invention; fig. 3 is a schematic structural diagram of an open state of the intelligent vacuum circuit breaker according to the present invention. The invention provides an intelligent vacuum circuit breaker 100, which comprises a temperature control device 1 with an accommodating space 10 inside and a vacuum arc extinguish chamber assembly 2 accommodated in the accommodating space 10.

The vacuum arc extinguish chamber component 2 comprises a movable contact 21 and a fixed contact 22 which are coaxial, a corrugated pipe 23 which is arranged at the end part of the movable contact 21 far away from the fixed contact 22, an insulating shell 24 which is used for containing the movable contact 21 and the fixed contact 22, a fixed end cover plate 25 which is arranged at the end part of the insulating shell 24 which is used for containing the fixed contact 22, a movable end cover plate 26 which is arranged at the end part of the insulating shell 24 which is used for containing the movable contact 21, a main shielding cover 27 which is arranged on the inner wall of the insulating shell 24 and is annularly arranged on the movable contact 21 and the fixed contact 22, a fixed conducting rod 28 which is contained in the insulating shell 24 and is electrically connected with the fixed contact 22, and a movable conducting rod 29 which is arranged at.

The moving contact 21 is a superconducting contact, a spring is arranged in the bellows 23, and the bellows 23 supports the moving contact 21 to move relative to the static contact 22 through the spring so as to realize the closing and opening of the vacuum arc extinguish chamber component 2, namely the closing and opening of the intelligent vacuum circuit breaker 100.

The moving contact 21 is made of a different electric material and a superconducting element material.

In this embodiment, copper and cadmium are added and rare alloys are added.

The superconducting element is niobium or lead.

The rare alloy is yttrium barium copper composite metal.

It should be noted that the different electric materials, the superconducting elements, and the rare alloys are only disclosed in a preferred embodiment in this specification, and are not limited to the technical solutions disclosed in this embodiment, and other different electric materials, superconducting elements, and rare alloys in the prior art can all implement this embodiment, and the descriptions are repeated in the middle of the specification.

The temperature control device 1 is a small refrigeration device with the temperature of 150 ℃ below zero to 250 ℃ below zero.

The temperature control equipment 1 comprises a cascade compressor 11, a microcomputer intelligent electronic temperature controller 12, a digital temperature adjusting and controlling device 13 and an overtemperature alarm 14.

Specifically, the temperature control device 1 can be realized by using an existing refrigeration device, and therefore, the application does not disclose a specific structure and a circuit structure thereof.

In use, please refer to fig. 2 again, when the intelligent vacuum circuit breaker 100 needs to be disconnected, the temperature control device 1 is turned on, the temperature inside the vacuum arc extinguishing chamber assembly 2 is controlled by the temperature control device 1, when the temperature reaches 150 degrees to 250 degrees below zero, the movable contact 21 generates a magnetic force repelling the stationary contact 22, and the magnetic force overcomes the elastic force of the bellows 23, so that the movable contact 21 moves away from the stationary contact 22, and the movable contact 21 and the stationary contact 22 are disconnected.

Referring to fig. 3 again, when the intelligent vacuum circuit breaker 100 needs to be closed, the temperature control device 1 is closed, and when the temperature is higher than 150 degrees, the magnetic force of the movable contact 21 disappears, and the movable contact 21 moves toward the fixed contact 22 under the action of the elastic force of the bellows 23, so that the movable contact 21 and the fixed contact 22 are closed.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An intelligent vacuum circuit breaker, comprising: the temperature control device is internally provided with a containing space, and the vacuum arc-extinguishing chamber component is contained in the containing space; the vacuum arc extinguish chamber component comprises a moving contact and a fixed contact which are coaxial, and a corrugated pipe which is arranged at the end part of the moving contact far away from the fixed contact, wherein the moving contact is a superconducting contact, and the corrugated pipe supports the moving contact to move relative to the fixed contact so as to realize the closing and the opening of the vacuum arc extinguish chamber, namely the closing and the opening of the vacuum circuit breaker.

2. The intelligent vacuum interrupter of claim 1, wherein the moving contact is made of a dissimilar electrical material and a superconducting element material.

3. The intelligent vacuum interrupter as defined in claim 2 wherein the dissimilar electrical materials are copper cadmium and rare alloys added.

4. The intelligent vacuum interrupter of claim 2, wherein the superconducting element is niobium or lead.

5. The intelligent vacuum interrupter of claim 1, wherein a spring is disposed within the bellows.

6. The intelligent vacuum circuit breaker according to claim 1, wherein the vacuum interrupter assembly further comprises an insulating housing for accommodating the moving contact and the stationary contact, a stationary end cover plate disposed at one end of the insulating housing for accommodating the stationary contact, a moving end cover plate disposed at one end of the insulating housing for accommodating the moving contact, a main shield disposed on an inner wall of the insulating housing and annularly disposed on the moving contact and the stationary contact, a stationary conductive rod accommodated in the insulating housing and electrically connected to the stationary contact, and a moving conductive rod disposed at one side of the moving end cover plate away from the moving contact and electrically connected to the moving contact.

7. The intelligent vacuum interrupter of claim 1, wherein the temperature control device is a small-scale-150 degrees to-250 degrees refrigeration device.

8. The intelligent vacuum circuit breaker according to claim 7, wherein the refrigeration equipment comprises a cascade compressor, a microcomputer intelligent electronic temperature controller, a digital temperature-regulating temperature controller and an over-temperature alarm.

9. The intelligent vacuum interrupter of claim 3, wherein the rare alloy is yttrium barium copper composite metal.