CN203312136U

CN203312136U - Heavy-current three-position double-fracture disconnecting switch

Info

Publication number: CN203312136U
Application number: CN2013203383891U
Authority: CN
Inventors: 刘元东; 关世龙; 冉堃
Original assignee: Beijing Hezong Shike Electric Power Technology Co Ltd
Current assignee: Beijing Hezong Shike Electric Power Technology Co Ltd
Priority date: 2013-06-13
Filing date: 2013-06-13
Publication date: 2013-11-27
Anticipated expiration: 2023-06-13

Abstract

The utility model discloses a heavy-current three-position double-fracture disconnecting switch which comprises moving blades, a ground row, static contacts and moving blade supports. Two ends of each moving blades are both moving contact ends. Each moving blade contains two contact wafers. Inner sides of the moving contact ends of the two contact wafers are respectively provided with contact surfaces, and outer sides of the moving contact ends of the two contact wafers are respectively provided with magnetic-lock plates. The moving contact ends of the two contact wafers and the magnetic-lock plates are connected through bolts. The outer sides of the magnetic-lock plates are equipped with belleville springs. According to the utility model, an arc-shaped pulling plate used as an intermediate transmission part is canceled, assembling difficulty is reduced, force during contact is more uniform, and current-carrying performance of the moving blades is also raised.

Description

Large electric current three station double-fracture isolating switches

Technical field

The utility model relates to a kind of isolating switch, relates in particular to a kind of large electric current three station double-fracture isolating switches.

Background technology

Isolating switch is in high-voltage switch electric appliance, to use maximum a kind of electrical equipment, and the principles and structure of itself is fairly simple, but because use amount is large, functional reliability requires high, all larger on the impact of design, foundation and the safe operation of electric substation, power plant.

As shown in Figure 1, isolating switch of the prior art is three station single break structures, and its operating process is:

When moving knife turns to arc control device copper bar position, be "on" position; When moving knife forwards the moving knife Support Position to, be gate-dividing state; When moving knife turns to contact position, be ground state.

There is following shortcoming at least in above-mentioned prior art:

As shown in Figure 1, by the arc arm-tie, be connected between axle and moving knife, not only make the structure of isolating switch more complicated, also improved manufacturing cost; As shown in Figure 2, moving knife contacts as the some contact with contact, has reduced ampacity; Between moving knife, do not have corresponding fasteningly, after multi-pass operation, may cause the loosening of moving knife, affect the break performance of isolating switch.

The utility model content

The purpose of this utility model is to provide that a kind of assembly difficulty is low, when contact stressed evenly, large electric current three station double-fracture isolating switches that the current-carrying performance is high.

The purpose of this utility model is achieved through the following technical solutions:

Large electric current three station double-fracture isolating switches of the present utility model, comprise moving knife, arrange, fixed contact, moving knife support, the two ends of described moving knife are the movable contact end, described moving knife comprises two contacts, the inboard of the movable contact end of two contacts is respectively equipped with contact-making surface.

By the technical scheme that above-mentioned the utility model provides, can be found out, the large electric current three station double-fracture isolating switches that the utility model embodiment provides, because the two ends of moving knife are the movable contact end, moving knife comprises two contacts, and the inboard of the movable contact end of two contacts is respectively equipped with contact-making surface.Moving knife is the double-gate structure, has cancelled the arc arm-tie as the intermediate transmission parts, has reduced assembly difficulty; Moving knife supports with isolation or contacting of ground row is the face contact, and stressed more even while not only making to contact also improved the current-carrying performance of moving knife simultaneously.

The accompanying drawing explanation

Fig. 1 is the structural representation of isolating switch in prior art;

Fig. 2 is the partial structurtes schematic diagram of isolating switch in prior art;

The structural representation of the large electric current three station double-fracture isolating switches that Fig. 3 provides for the utility model embodiment;

Fig. 4 is the view of station one in the utility model embodiment;

Fig. 5 is the view of station two in the utility model embodiment;

Fig. 6 is the view of station three in the utility model embodiment;

Fig. 7 is the structural representation of moving knife contact in the utility model embodiment;

Fig. 8 is the mounting structure schematic diagram of magnetic lock plate in the utility model embodiment.

In figure:

01, axle, 02, the arc arm-tie, 03, moving knife supports, 04, the arc control device copper bar, 05, moving knife, 06, contact, 07, contact point;

1, arrange 2, moving knife, 3, moving knife supports, 4, fixed contact, 5, contact-making surface, 6, the butterfly spring, 7, magnetic lock plate.

Embodiment

Below will be described in further detail the utility model embodiment.

Large electric current three station double-fracture isolating switches of the present utility model, its preferably embodiment be:

Comprise moving knife, arrange, fixed contact, moving knife support, the two ends of described moving knife are the movable contact end, described moving knife comprises two contacts, the inboard of the movable contact end of two contacts is respectively equipped with contact-making surface.

The outside of the movable contact end of two contacts is respectively equipped with magnetic lock plate.

Between the movable contact end of described two contacts and magnetic lock plate, be bolted, the outside of described magnetic lock plate is provided with the butterfly spring.

The utility model, on the basis of existing 630A isolating switch, after rated current increases to 1250A by 630A, is modified to the structure of isolating switch, can be normally by the electric current of 1250A.Improve simultaneously its break performance, and reduced the manufacturing cost of isolating switch.

Specific embodiment:

As shown in Figure 3,1250A is large, and electric current three station double-fracture isolating switches are three station double-fracture structures, compare the 630A isolating switch, and fracture is more obvious, has increased the break performance of isolating switch.Wherein, moving knife is the double-gate structure, and the corner of main shaft is 60 degree.Its operating process is:

When moving knife turns to as shown in Figure 4 position, be "on" position;

When moving knife forwards as shown in Figure 5 position to, be gate-dividing state;

When moving knife turns to as shown in Figure 6 position, be ground state.

Cancelled the arc arm-tie as the intermediate transmission parts, compared with the 630A isolating switch, the integration more of the structure of 1250 isolating switches, reduced assembly difficulty.

As shown in Figure 7, moving knife adopts the in line structure of double-pole of 50X5, and single blade length is 250mm, silver-plated processing is adopted on surface, moving knife supports with isolation or contacting of ground row is the face contact, and stressed more even while not only making to contact also improved the current-carrying performance of moving knife simultaneously.

As shown in Figure 8, for the shortcoming of 630A isolating switch, the utility model has added magnetic lock plate between two moving knife, the problem of easily becoming flexible after multi-pass operation to solve moving knife.Wherein, magnetic lock plate is fixed with the dish spring, has met contact pressure.

The beneficial effect of specific embodiment is:

Cancel the arc arm-tie as the intermediate transmission parts, reduced greatly the manufacturing cost of isolating switch;

Having passed through smoothly rated current is temperature rise test, mechanical endurance test and the Insulation Test of 1250A, is qualified electric product.

The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.

Claims

1. large electric current three station double-fracture isolating switches, comprise moving knife, arrange, fixed contact, moving knife support, and it is characterized in that, the two ends of described moving knife are the movable contact end, described moving knife comprises two contacts, and the inboard of the movable contact end of two contacts is respectively equipped with contact-making surface.

2. large electric current three station double-fracture isolating switches according to claim 1, is characterized in that, the outside of the movable contact end of two contacts is respectively equipped with magnetic lock plate.

3. large electric current three station double-fracture isolating switches according to claim 2, is characterized in that, between the movable contact end of described two contacts and magnetic lock plate, be bolted, the outside of described magnetic lock plate is provided with the butterfly spring.