CN2514480Y

CN2514480Y - Double arm type contact assembly for high-voltage isolation switch

Info

Publication number: CN2514480Y
Application number: CN 01271842
Authority: CN
Inventors: 阎淼江
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-29
Filing date: 2001-11-29
Publication date: 2002-10-02
Anticipated expiration: 2011-11-29

Abstract

The utility model relates to a double-arm type contact component for a high-voltage isolation switch, which comprises contact seat components, a contact component, a left and a right conduction arms connected with the contact seat components and the contact component and a spring device. The utility model is characterized in that each contact seat component is composed of more than three contact fingers which form a strip shape, one end of each contact finger tilts with cambered surface, and the other end is a folding head; the folding heads are uniformly clipped on the spring device composed of flat springs; a screw bolt connected with the position between the end of the left conduction arm and the spring device can be adjusted to adjust the pressure of the contact fingers. The contact component comprises contacts with U-shaped cross section, and the number of the contacts is the same to the number of the contact seat components; the contacts correspond to the contact fingers, and are evenly distributed around a base plate vertically connected with the right conduction arm. The contacts and the contact fingers of the utility model have all-wave and close contact. The utility model has small resistance, no current division in the spring device, no heating, high current carrying capacity and long lifetime.

Description

Double-arm high voltage isolation switch contact assembly

One, technical field

The utility model relates to the high voltage isolator in the electric power system, particularly the divided contact apparatus of high voltage isolator.

Two, background technology

High voltage isolator is to be used for a deciliter zero load or light loaded circuit in the electric power system, the high voltage electric equipment of conversion operation mode and isolation repair apparatus.1992 the 4th phases of " High-Voltage Electrical Appliances " magazine, the 33rd page of " GW5 isolating switch overheat Analysis and solution " literary composition disclosed a kind of contact assembly of double-arm high voltage isolator, this contact assembly comprises that a cross section is square but one side has the contact base of opening, one spring is arranged in the contact base, opening part at the two ends of spring with contact base is that fulcrum is connected with several fingertips, have one can insert and the cylindrical contact of closing, extracting and dividing between fingertip, the contact base and the contact outside are connected with a conductive arm separately.

This contact assembly is that the contact that relies on spring to provide tension force will be plugged between the fingertip clamps, and realizes electric power transfer thereby transmit electric power by contact base and conductive arm again.The way of contact of contact base and contact is the line contact, its shortcoming is in out of doors the long-time running, because the effect of dust and greasy dirt, can make contact resistance increase between contact base and the fingertip, thereby make spring and fingertip constitute electric bridge, the shunting of the electric current that in spring, produces and generating heat, and then can make contact overheated and burn section and reduced the reliability of whole electric power system thus.

Three, summary of the invention

Task of the present utility model is to overcome existing defective in the prior art, contact is reliable when designing a kind of use, can in spring (elastic device), not produce the electric current shunting, thereby can therefore not burn contact, the under equal conditions bigger a kind of novel double-arm high voltage isolation switch contact assembly of ampacity.

Technical measures are as follows:

A kind of double-arm high voltage isolation switch contact assembly, the contact assembly and the contact base assembly that comprise split, be positioned at the elastic device that the contact base assembly compresses contact assembly, the right side that links with contact assembly and contact base assembly, left side conductive arm, it is characterized in that described contact assembly is by an electrically-conductive backing plate with described right conductive arm vertical connection, and three evenly be distributed symmetrically the cross section that connects as one around it and constitute for the contact of " U " shape with the upper edge, the corresponding respective numbers fingertip that is provided with of described contact base assembly with contact assembly, fingertip is a strip conductor, its end that contacts with contact is the outside perk of cambered surface, and its end near left conductive arm has a discount; Described elastic device is the flat spring assembly of an one, corresponding with fingertip, it comprises a respective numbers flat spring, one end of the close left conductive arm of flat spring is connected as a single entity with a base plate behind " U " shape warpage and forms the spill tension base of receiving in the opening, described discount is stuck on the warpage, the other end of flat spring links by securing member and fingertip, left conductive arm and contact base group pyramid, and it links to each other by bolt with base plate.

Owing to adopted the structure described in the such scheme, several " U " shape contacts of the present utility model have constituted a kind of in appearance just as the same contact assembly of Flos Nelumbinis one (receiving in the petal), correspondingly four fingertips have then constituted the same contact base assembly of loudspeaker petals (petal abduction), bolt on the base plate of adjustment elastic device can be given a kind of inside elastic forepressure of fingertip, thereby can be with comprehensive the holding tightly of each contact of inserting in it.This shows that the utility model can reduce the contact resistance between fingertip and the contact effectively, overcome elastic device and shunted caused heating problem that contact is reliable compared to prior art, current capacity is big, the life-span is long.

Four, description of drawings

Fig. 1 is structural representation of the present utility model (contact base assembly and a contact assembly released state);

Fig. 2 is the structural representation that is positioned at the elastic device of contact base assembly;

Fig. 3 is the another kind of execution mode of contact base assembly.

Five, embodiment

A kind of double-arm high voltage isolation switch contact assembly, the contact assembly 1 and the contact base assembly 2 that comprise split and can peg graft mutually, being used in the contact base assembly 2 compress contact assembly 1 and the elastic device 3 of reliable conduction, the right side, the left conductive arm 5,4 that link to each other respectively with contact assembly 1 and contact base assembly 2.Contact assembly 1 along substrate 6 around evenly is distributed symmetrically the cross section that connect as one with the square electrically-conductive backing plate 6 of right conductive arm 5 vertical connections and two to (4) by one and constitutes for the contact 7 of " U " shape, makes the profile of contact assembly 1 seem the lotus of receiving just as in the petal.Right conductive arm 5 is a metal circular tube, the one plug pipe 24 that is fixedly linked with it by pin 23 is arranged in it, plug pipe 24 is with the internal thread button near an end of contact 7, be provided with a connecting hole 25 at the center of substrate 6, have a bolt 26 to pass connecting hole 25 and link to each other with plug pipe 24 from (promptly from the inner chamber of contact assembly 1 to plug pipe 24) outside to inside.

The relation that contact base assembly 2 and contact assembly 1 join for a kind of convex-concave, correspondingly on the contact base assembly 2 be provided with two to (4) fingertip 8 with contact 7, fingertip 8 is elongated as band iron, itself and contact 7 contacted ends are the outside perk 9 of cambered surface, so that contact 7 inserts, the end near left conductive arm 4 of fingertip 8 has a discount 10 (promptly having rolled over bends).

Elastic device 3 is the flat spring assembly of an one.Corresponding with fingertip (8), it comprises two pairs of flat springs 11, and the base plate 14 in the middle of flat spring 11 occupy with through one " U " shape warpage 13 after near an end of left conductive arms 4 fuses, so form the spill tension base 12 of receipts in the opening.The discount 10 of fingertip 8 is stuck on the warpage 13, the other end at flat spring 11 fixes by securing member (screw 15) and fingertip 8, the shape of the termination 16 that links with contact base assembly 2 of left side conductive arm 4 and the shape of tension base 12 match, be the rectangular pyramid body, it links to each other by bolt 17 with base plate 14, furthermore can adopt following dual mode: 1). 16 center has screw 18 (as shown in Figure 3) in the termination, bolt 17 is screwed in it and termination 16 can be drawn in the tension base 12, under the effect of its conical surface, it is tight more that bolt 17 is twisted, it makes the tight more of fingertip 8 formed horn mouths receipts more, thereby can make each contact 7 of inserting within it tighter by what embrace from four sides, contact resistance is littler, better.2) center of termination 16 has a hole equally, different is that ecto-entad is installed with a hollow bolt 22 on it, be fixed with a stopper 20 by pin 19 in the left side conductive arm 4, stopper 20 near a side of terminations 16 be fixedly connected (can be processed into one) screw rod 21 is arranged, screw rod 21 links to each other with hollow bolt 22 by internal thread button (full button); Bolt 17 passes base plate 14 and is screwed into hollow bolt 22, thereby left conductive arm 4 can be linked to each other with 2 tightenings of contact base assembly, the same with preceding a kind of connected mode, it is tight more that bolt 17 is twisted, termination 16 gives the precompression of fingertip big more, and contact base assembly 2 is tight more with 1 armful of ground of contact assembly, contact is good more thereby can make.

Contact 7, fingertip 8, flat spring 11 correspondences all are three and also are fine that it is 120 degree distributions respectively on substrate 6 or base plate 14, exist in order to save length, and this repeats no more.

As shown in FIG., each bar flat spring 11 can combine with several narrower steel spring plates.

Claims

1. double-arm high voltage isolation switch contact assembly, the contact assembly (1) and the contact base assembly (2) that comprise split, be positioned at the elastic device (3) that contact base assembly (2) compresses contact assembly (1), the right side that links with contact assembly (1) and contact base assembly (2), left side conductive arm (5,4), it is characterized in that described contact assembly (1) is by an electrically-conductive backing plate (6) with described right conductive arm (5) vertical connection, and three evenly be distributed symmetrically the cross section that connects as one around it and constitute for the contact (7) of " U " shape with the upper edge, the corresponding respective numbers fingertip (8) that is provided with of described contact base assembly (2) with contact assembly (1), fingertip (8) is a strip conductor, and its end near left conductive arm (4) has a discount (10); Described elastic device (3) is the flat spring assembly of an one, corresponding with fingertip (8), it comprises a respective numbers flat spring (11), one end of the close left conductive arm (4) of flat spring (11) is connected as a single entity with a base plate (14) behind " U " shape warpage (13) and forms the spill tension base of receiving in the opening (12), described discount (10) is stuck on the warpage (13), the other end of flat spring (11) links by securing member (15) and fingertip (8), the shape of the termination (16) that left side conductive arm (4) and contact base assembly (2) link and the shape kissing of described tension base (12) are combined into the polygonal pyramid body, and it links to each other by bolt (17) with base plate (14).

2. isolation switch contact assembly according to claim 1, the center that it is characterized in that described termination (16) are provided with a screw (18) that can link with described bolt (17).

3. isolation switch contact assembly according to claim 1, it is characterized in that described left conductive arm (4) is a tubular structure, one stopper (20) that is fixedly linked with it by pin (19) is arranged in it, stopper (20) is by a side of described termination (16) screw rod (21) that has been fixedly connected, and it links to each other by the internal thread button with the hollow bolt (22) that an ecto-entad is through on the termination (16); Described bolt (17) links to each other with hollow bolt (22) by screw thread.

4. isolation switch contact assembly according to claim 1 is characterized in that an end that contacts with contact (7) of described fingertip (8) is the outside perk of cambered surface (9).

5. according to claim 1,2 or 3 described isolation switch contact assemblies, it is characterized in that described right conductive arm (5) is a tubular structure, be fixed with a plug pipe (24) by another pin (23) in it, plug pipe (24) is with the internal thread button near an end of contact (7), at the center of described substrate (6) connecting hole (25) is arranged, other has a bolt (26) to link to each other with plug pipe (24) from passing connecting hole (25) outside to inside.

6. according to claim 1,2 or 3 described isolation switch contact assemblies, it is characterized in that described contact (7) is three or four.