CN201611733U

CN201611733U - Novel contact box for high-voltage switchgears

Info

Publication number: CN201611733U
Application number: CN2010201110504U
Authority: CN
Inventors: 涂大石
Original assignee: BEIJING DONGFANGYULI ELECTRICAL TECHNOLOGY Co Ltd
Current assignee: HUADIAN HIGH-TECH (BEIJING) ELECTRICAL CO., LTD.
Priority date: 2010-02-10
Filing date: 2010-02-10
Publication date: 2010-10-20
Anticipated expiration: 2020-02-10

Abstract

The utility model relates to a contact box applied in the electric field of high-voltage switches, in particular to a contact box for metal-enclosed switchgears. The contact box comprises a contact box body (1), a left valve (2) mounted on the contact box body (1), a left guide block (3) mounted on the left valve (2), a static contact (4), a current-conducting plate (5), a right guide block (6) mounted on a right valve (7), the right valve (7) mounted on the contact box body (1), and a fixed frame (9) mounted on the contact box body (1). The contact box and the valves are combined together, and the valves are directly pushed open, so that the transmission link is omitted, the occupied space is reduced, and the simple and reliable purpose is achieved.

Description

A kind of novel high-pressure switchgear contact box

Technical field

The utility model relates to high pressure (3.6～40.5kV) switchgear contact boxs, particularly metal enclosed switchgear contact box.

Background technology

At present, known high voltage switchgear is as follows with the architectural feature of contact box:

1. block electrified body (fixed contact) purpose when overhauling in order to reach, general independent design valve, when the moving contact on the circuit breaker (or other element) will be connected with fixed contact, in moving process, at first valve to be opened by transmission mechanism, moving contact is connected with fixed contact again.This has just brought following problem:

A. transmission mechanism more complicated, poor reliability;

B. generally have two valve, block upper and lower contact respectively, mass ratio is bigger, and especially not only quality is heavy for the valve of 40.5kV switchgear, and volume is also very big, and the reliability of action is very low;

C. owing to the needs of electric shield, valve might be the metallic conduction material, in case the three-phase shortcircuit accident can be caused in whereabouts out of control.

2. in order to reach the purpose of blocking electrified body (fixed contact) when overhauling, also have a kind of method that temporarily replaces valve, at first insert dividing plate (metal or nonmetallic) in the time of need entering compartment with dividing plate.This method operation volume loaded down with trivial details, that take is big.

The utility model content

The purpose of this utility model is to provide a kind of novel high-pressure switchgear contact box for addressing the aforementioned drawbacks.

This contact box comprises: be directly installed on the left and right valve on the contact box; Be installed in the guide pad on the left and right valve respectively.

Above-mentioned a kind of novel contact box is characterized in that, this contact box also comprises: middle porose fixed contact; Be fixed on the upper and lower bus fixture block on the contact box.Wherein, left and right valve connects with extension spring.

Beneficial effect

1. valve is directly installed on the contact box, has saved intermediate transmission mechanism;

2. valve is directly backed down by moving contact, and is simple, reliable;

3. bus is directly installed on the contact box, has save branch's connection bus;

4. porose fixed contact is beneficial to ventilation and heat, has improved the ability of the loaded current of whole switchgear.

Description of drawings

Fig. 1 is the front view of this contact box;

Fig. 2 is that the B of Fig. 3 is to view;

Fig. 3 inserts schematic diagram behind moving contact for this contact box;

Fig. 4 be A-A to cutaway view;

Fig. 5 is that the C of Fig. 4 is to view;

Among the figure: 1-contact box body; 2-left side valve; 3-left side guide pad; The 4-fixed contact; The 5-conductive plate; The right guide pad of 6-; The right valve of 7-; The 8-gathering sill; The 9-fixed frame; The 10-moving contact; The 11-extension spring; The 12-guide vane end stop; 13-Up Highway UHW pressing plate; 14-Down Highway pressing plate; The 15-bus; The 16-embedded nut.

Specific embodiment

This contact box comprises:

(1) contact box body 1-plays installation, supports the effect of other parts;

(2) left valve 2-and right valve 7 together play the effect of blocking electrified body (fixed contact 4);

(3) left guide pad 3-and left valve 2 are fixed together, when moving contact 10 move up be in contact with it after, be moved to the left driving left valve 2 under the effect of side force and under the effect of gathering sill 8;

(4) fixed contact 4-contacts formation galvanic circle, back with moving contact 10;

(5) conductive plate 5-connects into a galvanic circle to bus 15 and fixed contact 4;

(6) right guide pad 6-and right valve 7 are fixed together, when moving contact 10 move up be in contact with it after, move right driving right valve 7 under the effect of side force and under the effect of gathering sill 8;

(7) right valve 7-and left valve 2 together play the effect of blocking electrified body (fixed contact 4);

(8) gathering sill 8-is that left valve 2, right valve 7 play the guiding role;

(9) after fixed frame 9-is installed in left valve 2, right valve 7 in the gathering sill 8, bonding firm with glue and contact box body 1, play a supportive role;

(10) moving contact 10-contacts formation galvanic circle, back with fixed contact 4;

(11) extension spring 11-closes left valve 2, right valve 7 when moving contact 10 withdraws from the contact box automatically, blocks electrified body;

(12) guide vane end stop 12-left side valve 2, right valve 7 make seam be in the centre position all the time when closing automatically;

(13) Up Highway UHW pressing plate 13-is movable installs, and the crimping bus is used;

(14) Down Highway pressing plate 14-is connected with conductive plate 5, is fixed on the contact box body 1, and connection bus is used;

(15) be electrically connected usefulness between each switchgear of bus 15-.The cast conductor, anticorona, ampacity is high;

(16) embedded nut 16-installs and fixes contact box body 1 usefulness.

Need to prove, not detailed moving contact 10, the bus 15 of illustrating among the figure, this is a kind of parts well known in the art, it is not the parts in the application's contact box, just draws in order to describe use principle.

The utility model is described in further detail below in conjunction with accompanying drawing 1～5 and embodiment:

1. opening procedure:

1. moving contact 10 moves up and at first touches the lower inclined plane (see figure 1) of left guide pad 3, right guide pad 6;

2. left guide pad 3, right guide pad 6 produce the component of left and right direction because the inclined-plane contacts with the inclined-plane of moving contact 10.Simultaneously, the left and

right valve

2,7 of gathering sill 8 restrictions moves up and down, and can only left and rightly move, and last guide pad drives the left and right direction of valve and opens, and allows moving contact 10 enter in the contact box body 1, contacts (see figure 3) with fixed contact 4;

3. moving contact 10 is crossed left and right valve 2,7 (see figure 2) under the effect of extension spring 11 behind guide pad 3, the 6 convex edge peaks, drives left and

right guide pad

3,6 and moves to the centre, is blocked (see figure 3) by the conducting rod on the moving contact 10 at last;

2. pass closed procedure

1. moving contact 10 moves down the ramp that at first touches left guide pad 3, right guide pad 6;

2. identical with opening procedure, guide pad drives the left and right direction of valve and opens, and moving contact 10 moves on to outside the contact box body 1;

3. left valve 2, right valve 7 (see figure 2) under the effect of extension spring 11 drives left guide pad 3, right guide pad 6 and moves to the centre, is parked in the centre position at last under the restriction of guide vane end stop 12, so that can normally be backed down by moving contact 10 when opening next time.

Contact box during use (axis) is vertical to be installed, and fixed contact 4 centers have ventilation hole again, and the heat that the dynamic and static contact contact point of caloric value maximum produces can reach the effect that reduces temperature rise directly to spilling out.

Claims

1. a novel high-pressure switchgear contact box is characterized in that, comprising: be directly installed on the left and right valve (2,7) on the contact box (1); Be installed in the left and right guide pad (3,6) on the left and right valve (2,7).

2. a kind of novel contact box according to claim 1 is characterized in that, this contact box also comprises: middle porose fixed contact (4); Be installed in the bus fixture block (13,14) on the contact box (1), wherein, left valve (2), right valve (7) connect with extension spring (11).