CN102290262A

CN102290262A - Large-diameter dual-guiding contact device for large-current isolation switch

Info

Publication number: CN102290262A
Application number: CN2011102219522A
Authority: CN
Inventors: 程立; 吕军玲; 徐刚; 赵奔
Original assignee: China XD Electric Co Ltd
Current assignee: China Three Gorges Corp; China XD Electric Co Ltd
Priority date: 2011-08-04
Filing date: 2011-08-04
Publication date: 2011-12-21
Anticipated expiration: 2031-08-04
Also published as: CN102290262B

Abstract

The invention provides a large-diameter dual-guiding contact device for a large-current isolation switch. In the device, a moving contact has a large-diameter annular structure with good conductivity; a fixed contact consists of an inner circle of contact fingers and an outer circle of contact fingers; the moving contact is directly inserted between the inner circle of contact fingers and the outer circle of contact fingers in a switch-on state, so reliable electric contact and through-current capability of large current are ensured; and the moving contact and the fixed contact are respectively provided with a set of guiding device, so the large-diameter moving contact stably moves forwards and is accurately inserted into the middle of the fixed contact in the switch-on process. The inner and outer circles of contact fingers are adopted in the large-diameter dual-guiding contact device for the large-current isolation switch, the electric contact area is enlarged, and the capability of running large current is achieved; and by adopting the dual guiding devices, the moving contact of the isolation switch is reliably centered in the switch-on process, and the operation reliability of the isolation switch is improved.

Description

The heavy current disconnecting switches two guidance contacts devices of major diameter

[technical field]

The present invention relates to the moving contact and fixed contact of isolating switch that the generator circuit breaker the complete sets of equipment use in a kind of high voltage switchgear.

[background technology]

Because the rated current that the isolating switch of generator circuit breaker the complete sets of equipment passes through is very big; Need enough electrical-contact areas, could satisfy the requirement of through-current capability.The moving contact that diameter is big, weight is big, stroke is big owing to there is cantilever beam structure, is difficult to realize good centering effect in making process, just cause moving contact and fixed contact that hard collision takes place easily.

[summary of the invention]

The purpose of this invention is to provide a kind of heavy current disconnecting switches two guidance contacts devices of major diameter, it has enough big electric interface, can satisfy the through-current capability of big electric current; In making process, by two guiders moving contact centering effect is proofreaied and correct, realize reliably closing a floodgate.

To achieve these goals, the present invention adopts following technical scheme:

A kind of heavy current disconnecting switches comprises contact base, moving contact and fixed contact with the two guidance contacts devices of major diameter; Contact base and moving contact are loop configuration, and what contact base and moving contact were coaxial is assembled together; Two quiet side mounting panel correspondences are installed on two holders of contact base inner ring both sides, and two slide block correspondences are installed on the quiet side mounting panel; Two guide rails are installed in the transverse arm both sides, and slide block and corresponding guide rail are slidingly matched; Transverse arm is installed on the Connection Block of moving contact inner ring; Fixed contact comprises an annular static contact finger mount pad, and a plurality of inner ring fingertips, outer ring fingertip are assemblied in the inside and outside both sides of static contact finger mount pad in pairs; Static contact finger mount pad periphery or inner ring evenly are equipped with a plurality of guiders; Described guider comprises guiding trestle that is fixed on static contact finger mount pad periphery or inner ring and the roller that is installed on the guiding trestle; When "on" position, moving contact inserts between inner ring fingertip and the outer ring fingertip, the inner surface of inner ring fingertip contact moving contact, the outer surface of outer ring fingertip contact moving contact, the outer surface or the inner surface of the roller contact moving contact of guider.

The inner ring fingertip and the outer ring fingertip outside all are equipped with spring leaf.

Static contact finger mount pad periphery or inner ring evenly are equipped with 3 guiders.

During combined floodgate, the roller of moving contact elder generation contact guidance device contacts the inner ring fingertip and the outer ring fingertip of fixed contact again.

With respect to prior art, the present invention has the following advantages: a kind of heavy current disconnecting switches of the present invention adopts the inside and outside two fingertip structures of enclosing with the two guidance contacts devices of major diameter, increases electrical-contact area, has realized the ability of logical big electric current; Adopt two guiders, the moving contact that guarantees isolating switch is in making process, and reliable centering has been improved the reliability of isolator operation.

[description of drawings]

Fig. 1 be the isolating switch moving contact at the "on" position cutaway view, the assembly relation between contact base, moving contact, the fixed contact mainly is described;

Fig. 2 is the left view of Fig. 1, and the assembly relation of contact base, moving contact and guider A mainly is described.

Fig. 3 is the partial enlarged drawing of guider A assembly relation among Fig. 2.

Fig. 4 is the assembly structure figure of guider B;

Fig. 5 is the left view of Fig. 4;

Fig. 6 is the structural representation of inner ring fingertip, outer ring fingertip and static contact finger mount pad;

Fig. 7 is the schematic diagram at another visual angle of Fig. 6.

Wherein: the 1-contact base; The 2-moving contact; 3-inner ring fingertip; 4-outer ring fingertip; The 5-spring leaf; The 6-bolts and nuts; The 7-transverse arm; The quiet side mounting panel of 8-guider A; The 9-bolt; The 10-slide block; The 11-screw bolt and nut; The 12-guide rail; The 13-screw bolt and nut; The 14-guider; The 15-screw bolt and nut; 16-static contact finger mount pad; The 17-roller; The 18-guiding trestle; The 19-axle; The 20-bolt; 21-moving contact mass motion parts; 22-guider A; The 23-fixed contact; 24-guider B; The 25-Connection Block; The 26-holder; The 27-surfaces externally and internally.

[embodiment]

Below in conjunction with accompanying drawing the present invention is done and to describe in further detail.

See also shown in Fig. 1,2,3, the present invention includes contact base 1, moving contact 2 and fixed contact 23.The quiet side mounting panel 8 of guider A 22 is installed in by bolt 9 on the holder 26 of inner ring direct casting of contact base 1, is installed in slide block 10 on the quiet side mounting panel 8 of guider A by screw bolt and nut 11 then; Guide rail 12 is installed on the transverse arm 7 by screw bolt and nut 13, and slide block 10 and guide rail 12 cooperate forms a guider A 22, and slide block 10 is as the quiet side of guider A, and guide rail 12 is as the moving side of guider A.Transverse arm 7 is installed in by four bolts 20 on the Connection Block 25 of going up welding of inner ring of moving contact 2, and moving contact 2, transverse arm 7, guide rail 12, screw bolt and nut 13, bolt 20 are formed moving contact mass motion parts 21 together.Contact base 1 and moving contact 2 coaxial being assembled together are driven under the guiding of two cover guider A 22 by transverse arm 7, contact base 1 axially on motion.Inner ring fingertip 3, outer ring fingertip 4, spring leaf 5 are assemblied on the static contact finger mount pad 16 by screw bolt and nut 6, and inner ring fingertip 3, outer ring fingertip 4, spring leaf 5, screw bolt and nut 6, static contact finger mount pad 16 have formed the fixed contact 23 of inside and outside two circle fingertips.

See also Fig. 1, Fig. 4 and shown in Figure 5, roller 17, guiding trestle 18, axle 19 are assembled together and form guider 14 on the fixed contact, guider 14 has formed guider B 24 by on the uniform circumference that is installed in static contact finger mount pad 16 of screw bolt and nut 15.

The heavy current disconnecting switches of the embodiment of the invention realization principle of the two guidance contacts devices of major diameter:

See also Fig. 1 to shown in Figure 7, the contact of isolating switch is made up of moving contact 2 and stationary contact head term 23, moving contact 2 is by the good loop configuration of conductivity, the interior fingertip item 3 of fixed contact 23, spring leaf 5 has all been installed in the behind of outer fingertip item 4, when inserting fixed contact 23, passes through moving contact 2 the elastic pressure effect of spring leaf 5, guaranteed inside and

outside fingertip item

3,4 and the surfaces externally and internally 27 of moving contact 2 between enough normal pressures are arranged, make inside and outside fingertip item 3, there are enough contact pressures the interior outside 27 of 4 pairs of moving contacts 2, simultaneously enough big electrical-contact area has been arranged also, guaranteed the ability (rated current 27000A) of logical big electric current; Contact base 1, moving contact 2 is a cirque structure, moving contact 2 and contact base 1 coaxial installation, the special guider A 22 of one cover is installed on it simultaneously, moving contact 2 is under the guiding of guider A 22, contact base 1 axially on close, divide operation, guaranteed that so to a certain extent moving arcing contact is closing, divide in the operation and better slide along axis, but it is big to work as moving contact 2 diameters, weight is big, when stroke is big, because cantilever beam effect, the front end of moving contact 2 just has certain skew, cause the centering effect bad, for head it off, on the circumferential position of quiet arc contact outer ring fingertip uniform installation three guiders 14, promptly form guider B 24, make large diameter moving contact 2 when closing a floodgate near fixed contact 23, earlier by guider B 24 axially proofreading and correct to it, make it under the guiding of the roller on the guider 14 17, steadily, insert the centre of fixed contact 23 accurately, in the process of inserting, simultaneously because roller 17 effects on the guider 14, moving contact 2 is inserted sliding friction just become rolling friction, reduced moving contact greatly in the loss of inserting operating work just.Above structure has solved under the current state, and temperature rise is difficult to difficulty up to standard, has also solved the problem of the centering difficulty of large diameter dynamic/static contact in making process simultaneously.

Claims

1. a heavy current disconnecting switches is characterized in that with the two guidance contacts devices of major diameter, comprises contact base (1), moving contact (2) and fixed contact (23); Contact base (1) and moving contact (2) are loop configuration, contact base (1) and coaxial being assembled together of moving contact (2); Two quiet side mounting panels (8) correspondence is installed on two holders (26) of contact base (1) inner ring both sides, and two slide blocks (10) correspondence is installed on the quiet side mounting panel (8); Two guide rails (12) are installed in transverse arm (7) both sides, and slide block (10) and corresponding guide rail (12) are slidingly matched; Transverse arm (7) is installed on the Connection Block (25) of moving contact (2) inner ring; Fixed contact (23) comprises an annular static contact finger mount pad (16), and a plurality of inner ring fingertips (3), outer ring fingertip (4) are assemblied in the inside and outside both sides of static contact finger mount pad (16) in pairs; Static contact finger mount pad (16) periphery or inner ring evenly are equipped with a plurality of guiders (14); Described guider (14) comprises the guiding trestle (18) that is fixed on static contact finger mount pad (16) periphery or inner ring and is installed on roller (17) on the guiding trestle (18); When "on" position, moving contact (2) inserts between inner ring fingertip (3) and the outer ring fingertip (4), the inner surface of inner ring fingertip (3) contact moving contact (2), the outer surface of outer ring fingertip (4) contact moving contact (2), the outer surface or the inner surface of roller (17) the contact moving contact (2) of guider (14).

2. a kind of heavy current disconnecting switches as claimed in claim 1 is characterized in that with the two guidance contacts devices of major diameter the inner ring fingertip (3) and outer ring fingertip (4) outside all are equipped with spring leaf (5).

3. a kind of heavy current disconnecting switches as claimed in claim 1 is characterized in that with the two guidance contacts devices of major diameter static contact finger mount pad (16) periphery or inner ring evenly are equipped with 3 guiders (14).

4. a kind of heavy current disconnecting switches as claimed in claim 1 two guidance contacts devices of major diameter, it is characterized in that, during combined floodgate, the roller (17) of the first contact guidance device of moving contact (2) (14) contacts the inner ring fingertip (3) and the outer ring fingertip (4) of fixed contact (23) again.