CN220041698U

CN220041698U - Sliding electric connection device

Info

Publication number: CN220041698U
Application number: CN202320781245.7U
Authority: CN
Inventors: 马明; 何亮; 程相浩; 何超
Original assignee: Shanghai Qiangu Electric Power Technology Co ltd
Current assignee: Shanghai Qiangu Electric Power Technology Co ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-11-17
Anticipated expiration: 2033-04-11

Abstract

The utility model relates to the field of high-voltage vacuum switches, in particular to a sliding electric connection device, which comprises a vacuum arc-extinguishing chamber; the movable contact is connected with the movable contact through threads; the conductor is internally provided with a through hole, the conductor is sleeved outside the pull rod and the moving contact, the conductor is internally connected with the other end of the moving contact through threads, and the conductor can synchronously move with the moving contact; the support piece is provided with a through hole at the inside, a plurality of notches are formed in the through hole of the support piece, and the support piece is sleeved outside the conductor; and the spring contact is arranged in a notch in the through hole of the support piece, and the support piece is connected with the conductor through the spring contact. Compared with the prior art, the utility model has the advantages that: the spring contact of this device is circular structure, and the fillet is passed through, need not the bolt fastening, adopts elasticity electric contact, compares traditional flexible coupling, and the space is littleer, and the electric field is better, and the contact is more reliable.

Description

Sliding electric connection device

Technical Field

The utility model relates to the field of high-voltage vacuum switches, in particular to a sliding electric connection device.

Background

The vacuum circuit breaker has the advantages of small volume, light weight, suitability for frequent operation and no maintenance for arc extinction, and is widely applied to power distribution networks. The traditional vacuum circuit breaker's dynamic connection mainly adopts the flexible coupling technique, to the structure that voltage level is high, and the switch operation stroke is long, because flexible coupling is pressed by copper sheet stack back both ends and forms, can't do the fillet transition, and the electric field is uneven, causes the phenomenon of discharging easily. The copper sheet used for soft connection has small elastic modulus, and fatigue fracture is easy to generate when the copper sheet is repeatedly operated when the copper sheet is excessively large. The section of the flexible connection is rectangular, and the connection part needs to be fixed by a bolt, so that the volume of the part is overlarge and the contact is unreliable.

The Chinese patent publication No. CN108511258B discloses a pole for a vacuum circuit breaker and the vacuum circuit breaker, which comprises a conductive clamp, a vacuum arc-extinguishing chamber, a movable contact, a fixed contact and a flexible connecting piece. The section of the soft connecting piece, the conductive clamp and the lower wire outlet seat of the patent is rectangular, the round corner transition cannot be achieved, meanwhile, the soft connecting piece is required to be fixed through bolts, the size is too large, and the electric field is uneven.

The Chinese patent with the publication number of CN202363354U discloses a flexible connection of a quick permanent magnet vacuum circuit breaker, which comprises a conducting rod, a conducting clamp, a vacuum arc-extinguishing chamber and a flexible connecting piece. The section of the joint of the flexible connecting piece, the conductive clamp and the conductive rod is rectangular, the transition of a round angle cannot be achieved, and the electric field is uneven. The soft connecting piece is a non-standard piece, has high development and processing difficulty and is easy to cause fatigue fracture after repeated use. And the soft connecting piece also needs to be fixed by bolts, and the volume is overlarge.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing the sliding electric connection device which has small volume, good electric field and reliable contact.

In order to achieve the above purpose, a sliding electric connection device is designed, which comprises a vacuum arc-extinguishing chamber, wherein a cavity is arranged in the vacuum arc-extinguishing chamber, a fixed contact and a movable contact are arranged in the cavity, the fixed contact is fixed on one side of the cavity, and one end of the movable contact extends out of the vacuum arc-extinguishing chamber from the other side of the cavity; a notch is arranged at the other end of the movable contact in the axial direction; the movable contact is connected with the movable contact through threads; the conductor is internally provided with a through hole, the conductor is sleeved outside the pull rod and the moving contact, the conductor is internally connected with the other end of the moving contact through threads, and the conductor can synchronously move with the moving contact; the support piece is provided with a through hole at the inside, a plurality of notches are formed in the through hole of the support piece, and the support piece is sleeved outside the conductor; and the spring contact is arranged in a notch in the through hole of the support piece, and the support piece is connected with the conductor through the spring contact.

The utility model also has the following preferable technical scheme:

1. a boss is arranged on one side, connected with the moving contact, of the pull rod, and a spring washer and a gasket are arranged between the boss and the end face of the moving contact.

2. The outer circumference of the spring contact is in elastic contact with the support.

3. The guide ring is arranged in a notch in the through hole of the support piece, is positioned between the support piece and the conductor and is used for ensuring that the conductor meets the coaxiality requirement when relatively moving in the support piece.

4. The vacuum arc-extinguishing chamber near one side of the movable contact can be inserted into the supporting piece.

Compared with the prior art, the utility model has the advantages that:

the spring contact of this device is circular structure, and the fillet is passed through, need not the bolt fastening, adopts elasticity electric contact, solves the reliable electric contact in vacuum circuit breaker branch and close the main conductive part of process, compares traditional soft connection, and the space is littleer, and the electric field is better, and the contact is more reliable.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

in the figure: 1. a support; 2. a pull rod; 3. a conductor; 4. a spring contact; 5. a guide ring; 6. a vacuum arc extinguishing chamber; 7. a moving contact; 8. a stationary contact; 9. a gasket; 10. and a spring washer.

Detailed Description

The construction and principles of the present utility model will be readily apparent to those skilled in the art from the following description taken in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, a through hole is formed in the support member 1, a notch is formed in the through hole, and a spring contact 4 and a guide ring 5 are arranged in the notch. The support 1 is fitted over the conductor 3, the conductor 3 being connected to the support 1 by means of spring contacts 4 and guide rings 5. The outer circumference of the spring contact 4 is in elastic contact with the support 1. The guide ring 5 ensures that the conductor 3 fulfils the coaxiality requirements during the relative movement in the support 1.

The conductor 3 is internally provided with a through hole, and the conductor 3 is sleeved on the moving contact 7 and is connected with the moving contact 7 through threads. The conductor 3 can move synchronously with the moving contact 7. The moving contact 7 is provided with a notch in the axial direction on the side connected with the conductor 3, the pull rod 2 is inserted into the notch of the moving contact 7 after passing through the through hole in the conductor 3, and the pull rod 2 is connected in the notch of the moving contact 7 through threads. A boss is arranged on one side of the pull rod 2 connected with the moving contact 7, and a spring washer 10 and a gasket 9 are respectively arranged between the boss and the end face of the moving contact 7.

The utility model also comprises a vacuum arc-extinguishing chamber 6, a cavity is arranged in the vacuum arc-extinguishing chamber 6, a moving contact 7 penetrates into the cavity in the vacuum arc-extinguishing chamber 6 from outside to inside from one side of the pull rod 2, and the moving contact 7 can move in the cavity in the vacuum arc-extinguishing chamber 6 along the axial direction. The other side of the inner cavity of the vacuum arc-extinguishing chamber 6, which is far away from the moving contact, is also provided with a static contact 8. The fixed contact 8 is fixed with the vacuum arc-extinguishing chamber 6 through bolts. The side of the vacuum interrupter 6 close to the moving contact 7 may be inserted into a through hole of the support 1.

The position shown in fig. 1 is a brake separating position, when the pull rod 2 moves rapidly to the right along the axial direction, the moving contact 7 moves rapidly to the right synchronously, the moving contact 7 contacts with the fixed contact 8, the brake closing operation is completed, at this time, the conductor 3 and the moving contact 7 move synchronously to the right through threaded connection, the outer ring of the conductor 3 contacts with the circumferential direction of the spring contact 4, the spring contact 4 has pre-pressure, the conductor 3 is always reliably connected with the spring contact 4, the outer circumference of the spring contact 4 contacts with the support piece 1 elastically, and the electric connection is reliable.

The above description is only specific to the embodiments of the utility model, but the scope of the utility model is not limited thereto, and any person skilled in the art who is skilled in the art to which the utility model pertains shall apply to the technical solution and the novel concept according to the utility model, and shall all be covered by the scope of the utility model.

Claims

1. A sliding electrical connection device comprises

The vacuum arc-extinguishing chamber is internally provided with a cavity, the cavity is internally provided with a fixed contact and a movable contact, the fixed contact is fixed on one side of the cavity, and one end of the movable contact extends out of the vacuum arc-extinguishing chamber from the other side of the cavity;

it is characterized in that

A notch is arranged at the other end of the movable contact in the axial direction;

and also comprises

The pull rod is inserted into the notch of the moving contact at one side and connected with the moving contact through threads;

the conductor is internally provided with a through hole, the conductor is sleeved outside the pull rod and the moving contact, the conductor is internally connected with the other end of the moving contact through threads, and the conductor can synchronously move with the moving contact;

the support piece is provided with a through hole at the inside, a plurality of notches are formed in the through hole of the support piece, and the support piece is sleeved outside the conductor;

and the spring contact is arranged in a notch in the through hole of the support piece, and the support piece is connected with the conductor through the spring contact.

2. The sliding electric connection device as claimed in claim 1, wherein a boss is provided on a side of the pull rod connected to the moving contact, and a spring washer and a spacer are provided between the boss and an end surface of the moving contact.

3. A sliding electrical connection as in claim 1 wherein the outer circumference of the spring contact is in resilient contact with the support member.

4. A sliding electrical connection as in claim 1 further comprising a guide ring disposed within the slot within the support through bore, the guide ring being positioned between the support and the conductor for ensuring that the conductor meets coaxiality requirements during relative movement within the support.

5. A sliding electrical connection according to claim 1, wherein the vacuum interrupter on the side adjacent to the moving contact is insertable into the support.