CN2459746Y

CN2459746Y - Vacuum loading isolation switch

Info

Publication number: CN2459746Y
Application number: CN 01207201
Authority: CN
Inventors: 涂大石
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-28
Filing date: 2001-02-28
Publication date: 2001-11-14
Anticipated expiration: 2011-02-28

Abstract

The utility model relates to a new vacuum loading isolation switch, which is characterized in that each phase operating mechanism matched with a vacuum arc-extinguish room is composed of a transmission movable tool arm, a spring guide rod, a pressure spring, a transmission crank arm, a support frame, a bumper, a guide rod and a positioning shaft, wherein, the pressure spring is a valve opening spring and a valve closing spring; simultaneously, the pressure spring can also be used as a contact pressure spring of the arc-extinguishing room.; a isolation movable tool arm is divided two parts which can be connected through a pin shaft and can mutually rotate. The vacuum arc-extinguish room is arranged on a base of the operating mechanism. The utility model is that mechanical transmission technology is applied to the switching electric appliance field.

Description

A kind of novel evacuated load-break switch

The utility model relates to high and low pressure (0.4-72.5kV) vacuum-load isolating switch and operating mechanism thereof, particularly a kind of vacuum-load isolating switch.

At present, the structure of known load-break switch is as follows: vacuum interrupter is fixedly mounted on the insulating support, by an operating mechanism operation (the spring energy-storage formula is in the majority) that three-phase is shared.Isolating switch is by other three-phase common type operating mechanism operation.Add mutual interlocking gear between above-mentioned two operating mechanisms, elder generation disconnection arc extinguishing chamber when guaranteeing separating brake, the back disconnects isolating switch, closes earlier during combined floodgate to close behind the isolating switch and closes arc control device.This scenario-frame complexity, bulky, operate loaded down with trivial details, the cost height.In addition, this mechanism to realize that electric operating is still needed outer power supply source can.

The purpose of this utility model is to provide a kind of novel evacuated load-break switch for addressing the aforementioned drawbacks.

The purpose of this utility model is achieved in that a kind of novel evacuated load-break switch, it is characterized in that: the operating mechanism of each phase vacuum interrupter adapted by: transmission moving knife arm, spring conductor rod, compression spring, transmission crank arm, support, buffer, guide post and locating shaft are formed; Wherein vacuum interrupter adds and protects insulator and level to be installed on the moving knife arm support; The arc control device moving contact directly by transmission crank arm drive close, separating brake; Isolate the moving knife arm and be made up of transmission tool arm and conduction tool arm, be connected by countershaft, the conduction tool arm can rotate in certain scope around the countershaft on the transmission tool arm.Three insulators at on-load switch turnover line two ends are made capacitive divider, after rectification to storage capacitor (battery) charging, as minute, the closing operation power supply.

By above-mentioned structure as can be known the compression spring in the utility model be tripping spring be again switching-in spring, double as arc control device contact pressure spring simultaneously; The transmission tool arm can rotate around locating shaft.When countershaft, universal driving shaft and locating shaft are in alignment, be the critical point of combined floodgate or separating brake.Conducted electricity the moving knife arm in the past at critical separating brake and rotated a certain angle, guaranteed that isolating switch did not separate around countershaft.Behind the arc control device safety separating brake, conduction moving knife arm separates with fixed contact, and return guarantees enough isolation distances.Saved power transformer with the insulator style capacitor voltage divider, promptly saved volume and reduced cost again.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is the location drawing of the utility model switch behind combined floodgate.

Fig. 2 is the view of the utility model switch at critical gate-dividing state.

Fig. 3 is the Status view of the utility model switch behind complete separating brake.

Fig. 4 is the view of the utility model switch in critical "on" position.

Among the figure: 1-conduction moving knife arm; The 2-clamping plate; 3-isolates quiet tool arm; The 4-guide plate baffle plate of holding concurrently; 5-stage clip bolt; 6-transmission moving knife arm; The 7-spring conductor rod; The 8-countershaft; The 9-compression spring; 10-stage clip pea; The 11-universal driving shaft; The 12-transmission crank arm; The 13-support; The 14-buffer; The 15-guide post; The 16-conductive plate; The 17-insulator; The 18-vacuum interrupter; The 19-terminal block; The 20-locating shaft; 21-insulator (capacitor voltage divider of holding concurrently); The 22-base; The 23-insulated tension pole; 24-master's connecting lever; The 25-main shaft.

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4: main shaft (25) rotates under other dynamic actions, drives main connecting lever (24) action and spurs transmission moving knife arm (6) and rotate the purpose of reach branch, closing a floodgate around locating shaft (20).

Detailed process is as follows:

1, separating brake process: switch is when complete closing position, and compression spring (9) produces a pressure that acts on the reliable connection of dynamic and static contact on the guide post (15), that keep vacuum interrupter (18) by transmission crank arm (12).Drive transmission moving knife arm (6) and rotate up to countershaft (8), universal driving shaft (11) and locating shaft (20) (see figure 2) point-blank the time when main shaft (25) rotates counterclockwise around locating shaft (20), the arc control device moving contact is in critical separating brake position, and at this moment conduct electricity moving knife arm (1) and isolate under the effect of the frictional force between the quiet tool arm (3) around countershaft (8) rotate and not can with isolate quiet tool arm (3) and break away from.Rotate slightly again, balance breakdown pressure spring (9) imposes on the power of transmission crank arm (12), and it is rotated counterclockwise around locating shaft (20), and because of in the guide post (15) slotted hole being arranged, transmission crank arm (12) will be clashed into guide post (15) and be produced higher initial velocity.The arc control device moving contact is the separating brake influence of spring (9) (opening velocity only be stressed) under the drive of guide post (15).Behind the arc control device separating brake, main shaft (25) is rotated further, make the conduction moving knife arm (1) separate with quiet tool arm (3), up to the safety fracture apart from (see figure 3).

2: making process: in the separating brake position, compression spring (9) remains on the separating brake position by the self-closing power that transmission crank arm (12) overcomes the arc control device moving contact all the time.When transmission moving knife arm (6) rotates counterclockwise around locating shaft (20) under the drive of main shaft (25), conduction moving knife arm (1) is at first connected and is slipped under the effect of guide plate (4) with isolating quiet tool arm (3), until countershaft (8), universal driving shaft (11) and locating shaft (20) (see figure 4) point-blank once more.At this moment, be the critical "on" position of arc control device.Rotate slightly again, balance is destroyed, and the active force of compression spring (9) makes transmission crank arm (12) clockwise rotate around locating shaft (20), drives guide post (15) and arc control device moving contact and rotates to the combined floodgate direction, up to combined floodgate.Last main shaft (25) rotates again, makes isolation moving knife arm (1) be in horizontal level (closing position fully) (see figure 1).

The principle of capacitor voltage divider is seen Fig. 5, and when circuit of three-phase has arbitrary phase ground connection, the line voltage between the three-phase can not change, and guarantees that the direct voltage of rectification output remains in the claimed range.Piezo-resistance plays the effect of overvoltage protection rectifier bridge, capacitor.

Claims

1, a kind of novel evacuated load-break switch is characterized in that: the operating mechanism of each phase vacuum interrupter adapted by: transmission moving knife arm, spring conductor rod, compression spring, transmission crank arm, support, buffer, guide post and locating shaft are formed; Wherein vacuum interrupter adds and protects insulator and level to be installed on the moving knife arm support; The arc control device moving contact directly by transmission crank arm drive close, separating brake; Isolate the moving knife arm and be made up of transmission tool arm and conduction tool arm, connected by a bearing pin, the conduction tool arm can rotate in certain scope around the universal driving shaft of transmission tool arm.

2, a kind of novel evacuated load-break switch according to claim 1, it is characterized in that: three insulators at on-load switch turnover line two ends are made capacitive divider, after rectification to storage capacitor (battery) charging, as minute, the closing operation power supply.