CN211628971U

CN211628971U - Vacuum switch

Info

Publication number: CN211628971U
Application number: CN202020674824.8U
Authority: CN
Inventors: 姜兴辉; 纪海瑞; 曲红杰; 白晓磊; 林延春
Original assignee: Dalian Nuohao Lianheng Electronic Technology Co ltd
Current assignee: Dalian Nuohao Lianheng Electronic Technology Co ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-10-02
Anticipated expiration: 2030-04-28

Abstract

The utility model provides a vacuum switch, which comprises an insulating shell, an arc extinguish chamber is arranged in the insulating shell, the movable end of the arc extinguish chamber is also connected with an insulating pull rod, an operating mechanism is arranged at the bottom end of the insulating pull rod, the operating mechanism comprises a driving block and a driving block driving device, the driving block driving device comprises a driving wheel, the middle part of the driving wheel is fixedly connected with a transmission shaft, a driving wheel placing groove is arranged below a limiting cylinder of the driving block, the edge of the driving wheel is hinged with one end of a connecting rod, the driving block is driven to reciprocate up and down in the limiting cylinder of the driving block in the rotating process of the driving wheel, the driving block drives the insulating pull rod to reciprocate up and down, the action of closing and separating two contacts of the vacuum switch is realized, the operating mechanism at the movable end of the arc extinguish chamber can share one operating mechanism with a plurality of movable ends, the operation is synchronous, the operation is stable, and the actions of the open circuit and the closed circuit of the switch can be completed quickly and accurately.

Description

Vacuum switch

Technical Field

The utility model relates to a current switch equipment technical field, in particular to vacuum switch.

Background

A vacuum arc-extinguishing chamber, also known as a vacuum switch tube, is a core component of a medium-high voltage power switch, has the main functions of rapidly extinguishing arc and inhibiting current after a medium-high voltage circuit is cut off a power supply through excellent vacuum insulativity in the tube, avoids accidents and accidents, is mainly applied to a power transmission and distribution control system of electric power, and is also applied to power distribution systems of metallurgy, mines, petroleum, chemical engineering, railways, broadcasting, communication, industrial high-frequency heating and the like. The device has the characteristics of energy conservation, material conservation, fire prevention, explosion prevention, small volume, long service life, low maintenance cost, reliable operation, no pollution and the like. The vacuum arc-extinguishing chamber is divided into an arc-extinguishing chamber for a circuit breaker and an arc-extinguishing chamber for a load switch from the aspect of application, the arc-extinguishing chamber for the circuit breaker is mainly used for transformer substations and power grid facilities in the power sector, the arc-extinguishing chamber for the load switch is mainly used for end users of a power grid, and a fixed conducting rod, a fixed running arc surface, a fixed contact, a movable running arc surface and a movable conducting rod form a conducting system of the arc-extinguishing chamber. When the vacuum load switch and the vacuum contactor are switched on, the operating mechanism closes the two contacts through the movement of the movable conducting rod, the connection of a circuit is completed, when the vacuum switch breaks current, the two contacts of the arc extinguish chamber are separated, electric arcs are generated between the two contacts, and the electric arcs are extinguished until the current naturally crosses zero, so that the disconnection of the circuit is completed. In order to reduce the contact resistance between the two contacts as much as possible, keep the contact resistance stable and ensure that the arc extinguish chamber has good mechanical strength when bearing dynamic and stable current, the dynamic end of the arc extinguish chamber needs a stable operating mechanism to quickly and accurately complete the actions of opening and closing the switch.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the technical scheme provided by the utility model is that the vacuum switch comprises an insulating shell, an arc extinguish chamber is arranged in the insulating shell, a top wiring end is arranged at the static end of the arc extinguish chamber, the movable end of the arc extinguish chamber is connected with a flexible connecting sheet, the number of the insulating shell is two, the flexible connecting sheets on the two insulating shells are both connected with an intermediate conductor, a current transformer module is sleeved outside the intermediate conductor, the movable end of the arc extinguish chamber is also connected with an insulating pull rod, an operating mechanism is arranged at the bottom end of the insulating pull rod, the operating mechanism comprises an insulating pull rod limiting hole, a driving block limiting cylinder is arranged at the bottom of the insulating pull rod limiting hole, a driving block is arranged in the driving block limiting cylinder, the bottom end of the insulating pull rod is fixedly connected with the top end of the driving block, and a driving block driving device, the driving block driving device comprises a driving wheel, the middle of the driving wheel is fixedly connected with the transmission shaft, the edge of the driving wheel is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the bottom end of the driving block.

Preferably, the transmission shaft penetrates through the base and is fixedly connected with an output shaft of the driving motor through a coupling.

Preferably, the drive shaft is disposed within the drive shaft mounting bracket.

Preferably, a driving wheel placing groove is formed below the driving block limiting cylinder and is formed in the middle of the transmission shaft mounting frame.

The beneficial effects of the utility model are embodied in the following aspect:

the utility model adopts the bottom end of the insulating pull rod of the movable end of the arc extinguish chamber is provided with an operating mechanism, the operating mechanism comprises a driving block and a driving block driving device, the driving block driving device comprises a driving wheel, the middle part of the driving wheel is fixedly connected with a transmission shaft, a driving wheel placing groove is arranged below a limiting cylinder of the driving block, the edge of the driving wheel is hinged with one end of a connecting rod, the other end of the connecting rod is hinged with the bottom end of the driving block, the transmission shaft penetrates out of a base and is fixedly connected with an output shaft of a driving motor through a shaft coupler, the transmission shaft drives the driving wheel to rotate under the driving of the driving motor, the driving block is driven to reciprocate up and down in the limiting cylinder of the driving block in the rotating process of the driving wheel, the driving block drives the insulating pull rod to reciprocate up and down, the action of closing and separating two contacts of a vacuum switch is realized, the operating mechanism of the movable end of, the operation is synchronous, the operation is stable, and the actions of the open circuit and the closed circuit of the switch can be completed quickly and accurately.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the operating mechanism.

In the shown drawing, an insulating shell 1, an arc extinguish chamber 2, a movable end 3 of the arc extinguish chamber, an intermediate conductor 4, an insulating pull rod 5, an insulating pull rod limiting hole 6, a driving block limiting cylinder 7, a driving block 8, a driving wheel 9, a transmission shaft 10, a driving wheel placing groove 11, a connecting rod 12, a transmission shaft mounting frame 13 and a driving motor 14 are arranged in the arc extinguish chamber.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

As shown in fig. 1-2, a vacuum switch comprises an insulating housing 1, an arc extinguish chamber 2 is arranged inside the insulating housing 1, a top terminal is arranged at the static end of the arc extinguish chamber 2, a movable end 3 of the arc extinguish chamber is connected with a flexible connecting sheet, two flexible connecting sheets on the insulating housing 1 are arranged, the flexible connecting sheets on the two insulating housings 1 are both connected with an intermediate conductor 4, a current transformer module is sleeved outside the intermediate conductor 4, the movable end 3 of the arc extinguish chamber is also connected with an insulating pull rod 5, the bottom end of the insulating pull rod 5 is provided with an operating mechanism, the operating mechanism comprises an insulating pull rod limiting hole 6, a driving block limiting cylinder 7 is arranged at the bottom of the insulating pull rod limiting hole 6, a driving block 8 is arranged in the driving block limiting cylinder 7, the bottom end of the insulating pull rod 5 is fixedly connected with the top end of the driving block 8, and a driving block 8 driving device is arranged below the driving, the driving device of the driving block 8 comprises a driving wheel 9, the middle part of the driving wheel 9 is fixedly connected with a transmission shaft 10, a driving wheel placing groove 11 is arranged below a driving block limiting cylinder 7, the edge of the driving wheel 9 is hinged with one end of a connecting rod 12, the other end of the connecting rod 12 is hinged with the bottom end of the driving block 8, the transmission shaft 10 is arranged in a transmission shaft mounting rack 13, the driving wheel placing groove 11 is arranged in the middle part of the transmission shaft mounting rack 13, the transmission shaft 10 penetrates out of a base and is fixedly connected with an output shaft of a driving motor 14 through a coupler, the transmission shaft 10 drives the driving wheel 9 to rotate under the driving of the driving motor 14, the driving block 8 is driven to reciprocate up and down in the driving block limiting cylinder 7 in the rotating process of the driving wheel 9, the driving block 8 drives an insulating pull rod 5 to reciprocate up and down, and the action of closing and separating, the operating mechanism of the movable end 3 of the arc extinguish chamber can realize that a plurality of movable ends share one operating mechanism, the operation is synchronous, the operation is stable, and the actions of opening and closing the switch can be quickly and accurately completed.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. A vacuum switch comprises an insulating shell, an arc extinguish chamber is arranged in the insulating shell, a top wiring end is arranged at the static end of the arc extinguish chamber, the moving end of the arc extinguish chamber is connected with a flexible connecting sheet, the number of the insulating shell is two, the flexible connecting sheets on the two insulating shells are both connected with an intermediate conductor, and a current transformer module is sleeved outside the intermediate conductor, which is characterized in that the moving end of the arc extinguish chamber is also connected with an insulating pull rod, the bottom end of the insulating pull rod is provided with an operating mechanism which comprises an insulating pull rod limiting hole, the bottom of the insulating pull rod limiting hole is provided with a driving block limiting cylinder, a driving block is arranged in the driving block limiting cylinder, the bottom end of the insulating pull rod is fixedly connected with the top end of the driving block, a driving block driving device is arranged below the driving block limiting cylinder, and the driving block driving device comprises, the middle part of the driving wheel is fixedly connected with the transmission shaft, the edge of the driving wheel is hinged with one end of the connecting rod, and the other end of the connecting rod is hinged with the bottom end of the driving block.

2. The vacuum switch according to claim 1, wherein the transmission shaft penetrates through the base and is fixedly connected with the output shaft of the driving motor through a coupling.

3. The vacuum switch of claim 2, wherein the drive shaft is disposed within a drive shaft mounting bracket.

4. The vacuum switch according to claim 3, wherein a driving wheel seating groove is provided below the driving block limiting cylinder, and the driving wheel seating groove is provided in a middle portion of the transmission shaft mounting bracket.