CN201210461Y

CN201210461Y - 35kV outdoor AC high isolating switch

Info

Publication number: CN201210461Y
Application number: CNU2008201200202U
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: 2009-03-18
Anticipated expiration: 2018-06-17

Abstract

A 35 kV outdoor alternating current isolating switch used for switch on/off conversion of an electric power circuit, comprising an under frame, an insulator, a terminal board, a contact, and an insulative draw rod, a crank and a rotary shaft; a grounded contact is disposed on the under frame; said contact has one end hinged with the terminal board, and the other end in contact connection with an incoming line contact disposed on the terminal board, and further in contact connection with the grounded contact on the under frame; the middle part of the contact is hinged with the upper end portion of the insulative draw rod, while the lower end portion of the insulative draw rod is hinged with the crank secured with the rotary shaft mounted on the under frame; the rotary shaft is a connecting shaft through three phases; a spring is connected between said crank and the grounded contact on the under frame; the utility model can implement switch on/off of tri-phase simultaneously, and break the ground when switching on, and being grounded of tri-phase when switching off, with low manufacturing cost, safety, and high reliability, excellent mechanical intension, and long useful life.

Description

The 35kV outdoor AC isolation switch

Technical field

The utility model relates to the electric switch technical field, especially relates 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 purpose of this utility model is not only can realize the three-phase separating brake or the interlock of closing a floodgate in order to overcome the deficiency of prior art, to provide a kind of need once to move, and disconnects ground connection simultaneously when closing a floodgate, and realizes the 35kV outdoor AC isolation switch of three-phase ground connection during separating brake.

The purpose of this utility model is achieved in that a kind of 35kV outdoor AC isolation switch, and a underframe is arranged, and 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 by 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 utility model, only need once action can realize that not only three-phase divides or combined floodgate, when closing a floodgate, disconnect ground connection simultaneously, can realize three-phase ground connection during separating brake, and it is low to have cost of manufacture, and security reliability height, mechanical strength are good, the characteristics of long service life.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a structural representation of the present utility model.

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 utility model 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 10 is installed on this universal driving shaft; Said crank 8 is connected spring 11 with 4 of grounding contacts on the underframe.

Claims

1, a kind of 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 therefore 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), and this contact knife one end and terminal block (3) are hinged, and the inlet wire contact (6) that is provided with on the other end and the terminal block becomes can contact connection, and can contact connection with grounding contact (4) one-tenth on the underframe; 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, and handle (10) is installed on this universal driving shaft; Be connected spring (11) between the grounding contact (4) on said crank (8) and the underframe.