CN101320649B

CN101320649B - 35kV outdoor AC isolation switch

Info

Publication number: CN101320649B
Application number: CN2008100625816A
Authority: CN
Inventors: 蒋立; 尚永恩
Original assignee: NINGBO LUDING ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: NINGBO LUDING ELECTRONIC SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2008-06-17
Filing date: 2008-06-17
Publication date: 2012-01-11
Anticipated expiration: 2028-06-17
Also published as: CN101320649A

Abstract

A 35kV outdoors alternating current isolation switch is used for deciliter conversion of power circuit. The isolation switch comprises a under frame, an insulator, a connecting plate, a contact knife, an insulating tension pole, a crank and a rotating shaft; the under frame is provided with a ground contact; one end of the contact knife is hinged with the connecting plate; the other end is in contactable link with an income contact provided on the connecting plate, and is in contactable link with the ground contact on the under frame; middle of the contact knife is hinged with the upper end of the insulating tension pole; the lower end of the insulating tension pole is hinged with the crank; the crank is fixed with the rotating shaft provided on the under frame; the rotating shaft is a universal driving shaft permeating three phase; a spring is connected between the crank and the ground contact on the under frame. The invention not only realizes three phase breaking or closing brake by only once action, but also breaks off ground when closes brake, and realizes the three phase ground at breaking brake; and the isolation switch has the characters of low manufacturing cost, high safe reliability, good mechanical strength and long service life.

Description

The 35kV outdoor AC isolation switch

Technical field

The present invention relates to the electric switch technical field, especially relate to the high-pressure air circuit breaker of no arc extinguishing or flash guard.

Background technology

In the power transmission and transforming equipment of electric power system, isolating switch is the visual plant of realizing dividing, close conversion line and guaranteeing interruption maintenance safety, the isolating switch that on the power transmission and transformation line of 35kV voltage, uses at present; Existing usefulness is once moved and is realized that three link; But for safety, leading-out terminal also must ground connection behind the separating brake, therefore all gets to join plug-in strip in addition and be used for realizing three-phase ground connection; Increased cost of manufacture, and operated and be not very convenient.

Summary of the invention

The objective of the invention is in order to overcome the deficiency of prior art, provide a kind of need once to move and not only can realize the three-phase separating brake or the interlock of closing a floodgate, when closing a floodgate, break off ground connection simultaneously, realize the 35kV outdoor AC isolation switch of three-phase ground connection during separating brake.

The objective of the invention is to realize like this: a kind of 35kV outdoor AC isolation switch, a underframe is arranged, fixed insulation on the underframe, insulator divide the turnover line two rows, and the turnover line is three-phase, and therefore every row has 3 insulators; On every phase insulator terminal block is housed, connects the turnover line respectively; On every underframe that passes in and out mutually between the line insulator, be provided with grounding contact; Every top that passes in and out mutually between the line insulator is provided with contact knife; The fixing terminal block in this contact knife one end and outlet insulator top is hinged; The inlet wire contact of the terminal block that the other end and inlet wire insulator top are fixing becomes can contact connection, and becomes can contact connection with grounding contact on the underframe; Be hinged with edge pull bar upper end at the contact knife middle part, the hinged crank in the bottom of insulated tension pole, this crank fixes with the rotating shaft that is installed on the underframe, and said rotating shaft is the universal driving shaft that runs through three-phase, fitting operation handle on this universal driving shaft; Be connected spring between the grounding contact on said crank and the underframe.

Its course of action is such: when separating brake, pull handle, universal driving shaft makes with its fixing three-phase crank and rotates simultaneously, and through with the hinged insulated tension pole of crank contact knife being left behind, after crank rotate in place, contact knife was just in time connected with grounding contact; In like manner, when closing a floodgate, pull handle in the other direction, crank is rotated, contact knife closes with the inlet wire contact after breaking away from grounding contact.

Owing to adopted technique scheme; A kind of 35kV outdoor AC isolation switch of the present invention; Only need once action can realize that not only three-phase divides or combined floodgate, when closing a floodgate, break off ground connection simultaneously, can realize three-phase ground connection during separating brake; And it is low to have cost of manufacture, and security reliability is high, mechanical strength is good, the characteristics of long service life.

Description of drawings

Below in conjunction with accompanying drawing the present invention is further described.

Fig. 1 is a structural representation of the present invention.

Among the figure: 1, underframe, 2, insulator, 3, terminal block, 4, grounding contact, 5, contact knife, 6, the inlet wire contact, 7, insulated tension pole, 8, crank, 9, rotating shaft, 10, handle, 11, spring.

Embodiment

Contrast accompanying drawing 1, a kind of 35kV outdoor AC isolation switch of the present invention has a underframe 1, and fixed insulation 2 on the underframe, insulator divide the turnover line two rows, and the turnover line is three-phase, and therefore every row has 3 insulators; On every phase insulator terminal block 3 is housed, connects the turnover line respectively; On every underframe that passes in and out mutually between the line insulator, be provided with grounding contact 4; Every top that passes in and out mutually between the line insulator is provided with contact knife 5; The fixing terminal block 3 in this contact knife one end and outlet insulator top is hinged; The inlet wire contact that is provided with on the other end and the terminal block can contact connection for 6 one-tenth, and can contact connection for 4 one-tenth with grounding contact on the underframe; In hinged insulated tension pole 7 upper ends, contact knife middle part, the hinged crank 8 in the bottom of insulated tension pole 7, this crank 8 fixes with the rotating shaft 9 that is installed on the underframe, and said rotating shaft 9 is the universal driving shafts that run through three-phase, and handle installation 10 on this universal driving shaft; Said crank 8 is connected spring 11 with 4 of grounding contacts on the underframe.

Claims

1. a 35kV outdoor AC isolation switch has a underframe (1), and fixed insulation (2) on the underframe, insulator divide the turnover line two rows, and the turnover line is three-phase, and every row has 3 insulators; Terminal block (3) is housed on every phase insulator, connects the turnover line respectively, it is characterized in that: on every underframe that passes in and out mutually between the line insulator, be provided with grounding contact (4); Every top that passes in and out mutually between the line insulator is provided with contact knife (5); This contact knife one end and terminal block (3) are hinged; The inlet wire contact (6) that is provided with on the other end and the terminal block becomes can contact connection, and the other end of this contact knife also with underframe on grounding contact (4) one-tenth can contact connection; In hinged insulated tension pole (7) upper end, contact knife middle part, the hinged crank in bottom (8) of insulated tension pole (7), this crank (8) fixes with the rotating shaft (9) that is installed on the underframe; Said rotating shaft (9) is the universal driving shaft that runs through three-phase, handle installation on this universal driving shaft (10); Be connected spring (11) between the grounding contact (4) on said crank (8) and the underframe.