CN201364854Y

CN201364854Y - Double-fracture vacuum fling-cut switch

Info

Publication number: CN201364854Y
Application number: CNU2009200499601U
Authority: CN
Inventors: 唐杰; 李松乔
Original assignee: ZHUHAI FANGXIN ELECTRICAL CO Ltd
Current assignee: ZHUHAI FANGXIN ELECTRICAL CO Ltd
Priority date: 2009-01-07
Filing date: 2009-01-07
Publication date: 2009-12-16
Anticipated expiration: 2019-01-07

Abstract

The utility model discloses a high-voltage vacuum fling-cut switch with reignition rate far below the value specified in C2-level standard of a circuit breaker, as well as long service life. The high-voltage vacuum fling-cut switch is suitable for application in the 7.2-72.5 kV electricity distribution field. The utility model is characterized in the center lines of the movable-terminal conductive rods (3-1 and 3-2) of two vacuum arc-extinguishing chambers (2-1 and 2-2) arranged on the two sides of an operation box (7) at the upper part of the high-voltage vacuum fling-cut switch adopt the same line as that of movable rods (5-1 and 5-2) of two straight positioning pieces; the ends of the movable-terminal conductive rods (3-1 and 3-2) and the ends of the movable rods (5-1 and 5-2) are axially sleeved and connected with each other respectively, and can slide 5mm to 20 mm; and the other ends of the movable rods (5-1 and 5-2) of the two straight positioning pieces are connected with two crank arms (8-1 and 8-2) of a drawn rod at the top end of a driven system drawn rod (9). When the high-voltage vacuum fling-cut switch is arranged in the on/off position, brake separating positions of the movable-terminal conductive rods (3-1 and 3-2) of arc-extinguishing chambers (2-1 and 2-2) are positioned by two ends of a limiting rod (6) through the movable rods (5-1 and 5-2) of the two straight positioning pieces.

Description

Double break mouth vacuum fling-cut switch

Technical field

The present invention relates to a kind of high-pressure vacuum switch, particularly relate to a kind of double break mouth vacuum fling-cut switch, be adapted at using in the distribution field of 7.2-72.5kV.

Background technology

High-pressure vacuum switch has obtained using widely in the distribution field of 7.2-40.5kV.In the distribution field of 7.2--12kV, adopt the single break structure basically, in 40.5kV distribution field, adopt the double break mouth structure sometimes.The CN2919498Y utility model patent discloses a kind of horizontal double break mouth vacuum circuit-breaker that is used for electric locomotive, its course of action is as follows: during combined floodgate, mechanism drives insulated tension pole and moves upward, make on the transverse slat and move, the compression buffer spring moves upward buffer casting, horizontal connecting lever rotates along suitable, counterclockwise respectively about making, make left and right perpendicular connecting lever drive the contact pull bar and move right left,, finish closing operation up to the dynamic/static contact contact; During separating brake, mechanism drives insulated tension pole and moves downward, and the direction when making left and right horizontal connecting lever rotation direction and closing a floodgate is opposite, the rightabout motion when perpendicular connecting lever drives the contact pull bar and closes a floodgate about making, drive contact pull bar drive moving contact and leave fixed contact, finally finish sub-switching operation.

This structure has following weak point, when perpendicular connecting lever rotates about the first, drive the contact pull bar and swing up and down, and moving contact also follows pull bar to swing up and down, and is unfavorable for that moving contact closes reposefully, separating brake; It two is to be left and right horizontal connecting lever, and left and right perpendicular connecting lever is provided with two cover rotary axle box, and corresponding fixture, makes structure complicated.

Summary of the invention

The technical problems to be solved in the utility model provide provide a kind of simple in structure, parts are few, and close, double break mouth vacuum fling-cut switch that separating brake is stable.

For solving the problems of the technologies described above, the technical scheme that the utility model provides is: double break mouth vacuum fling-cut switch, an one pole comprises: control box 7, two vacuum interrupter 2-1 and 2-2, two switching-in spring 4-1 and 4-2, two straight line keeper 5-1 and 5-2, the splitting lock cushioning backstay 6 of two vacuum interrupter 2-1 and 2-2 moved end, strut porcelain bushing pipe 10, drive system pull bar 9, operating mechanism 11 and underframe 12, wherein, be contained in double break mouth live drop and cut close the center line of the motion rod member among the moved end conducting rod 3-1 of two vacuum interrupter 2-1 of control box 7 both sides, top and 2-2 and 3-2 and two straight line keeper 5-1 and the 5-2 on same straight line, the coaxial separately from each other connection that is nested in their termination, and 5-20mm slidably; The other end of the motion rod member among two straight line keeper 5-1 and the 5-2 links to each other with 8-2 with two connecting lever 8-1 on drive system pull bar 9 tops respectively.

Scheme is preferably: the moved end conducting rod 3-1 of two vacuum interrupter 2-1 and 2-2 and the separating brake position of 3-2 are located by splitting lock cushioning backstay 6 two ends by the motion rod member among two straight line keeper 5-1 and the 5-2.

The utility model double break mouth vacuum fling-cut switch is not only by straight line keeper guiding moving contact pull bar, the moving contact pull bar is moved on the fixed contact center line exactly, eliminated the possibility that the moving contact pull bar swings up and down, and two pairs of connecting levers have been substituted with pair of links, and cancelled two cover rotary axle box and fixtures thereof, make the structure of double break mouth vacuum fling-cut switch more simple.In addition, the utility model also utilizes the superperformance of double break mouth when cut-offfing capacitance current fully, makes the requirement of the rate of restriking when cut-offfing capacitance current far below 2 grades of circuit breaker standard C, thereby when cut-offfing capacitance current, can not damage the insulation of distribution line and controller switching equipment, not cause insulation fault

Description of drawings

Fig. 1 is the structural representation of the utility model most preferred embodiment double break mouth vacuum fling-cut switch;

When Fig. 2 is Fig. 1 double break mouth vacuum fling-cut switch combined floodgate, each position component graph of a relation in the control box;

When Fig. 3 is Fig. 1 double break mouth vacuum fling-cut switch separating brake, each position component graph of a relation in the control box.

Below in conjunction with the drawings and specific embodiments the utility model double break mouth live drop being cut the pass describes in detail.

Embodiment

In conjunction with referring to Fig. 1, Fig. 2, Fig. 3, double break mouth vacuum fling-cut switch 100, an one pole comprises: splitting lock cushioning backstay 6, strut porcelain bushing pipe 10, drive system pull bar 9, operating mechanism 11 and the underframe 12 of control box 7, two vacuum interrupter 2-1 and 2-2, two switching-in spring 4-1 and 4-2, two straight line keeper 5-1 and 5-2, two vacuum interrupter 2-1 and 2-2 moved end.Wherein, being contained in the quiet end of two vacuum interrupter 2-1 of control box 7 both sides, high-pressure vacuum switch top and 2-2 and outlet terminal 1-1 and 1-2 links, motion rod member 5-1 in the moved end conducting rod 3-1 of vacuum interrupter 2-1 and 2-2 and 3-2 and two the straight line keepers and the center line of 5-2 are on same straight line, the coaxial separately from each other connection that is nested in their termination, and 5-20mm slidably, with compression or discharge switching-in spring 4-1 and the 4-2 that is enclosed within their outsides.The motion rod member 5-1 in the straight line keeper and the other end of 5-2 link to each other with 8-2 with two connecting lever 8-1 of drive system pull bar top pull bar respectively, when pull bar 9 moves up and down, make two motion rod member 5-1 and 5-2 side-to-side movements in the straight line keeper, be enclosed within the switching-in spring 4-1 and the 4-2 of their outsides with compression or release, and drive moved end conducting rod 3-1 and 3-2 side-to-side movement, make two vacuum interrupter 2-1 and 2-2 carry out branch, closing operation.Pull bar 9 carries out actuating by operating mechanism 11, and control box 7 is supported by strut porcelain bushing 10, and control box 7 and strut porcelain bushing 10 all install on the underframe 12 of high pressure vacuum fling-cut switch.Because the moved end conducting rod 3-1 of vacuum interrupter 2-1 and 2-2 and 3-2 be moving linearly on the center line of quiet end exactly, has reduced the spring between contact during combined floodgate significantly, helps reducing the rate of restriking when cut-offfing.Because adopt two two vacuum interrupters series connection, the speed when closing a floodgate between contact also can reduce significantly, the rate of restriking when both having reduced capacitance current when cut-offfing, the mechanical endurance of also having improved the vacuum fling-cut switch.

Strut porcelain bushing pipe 10 supports the vacuum interrupter 2-1 and the 2-2 of top control boxs 7 and two series connection, and two vacuum interrupter 2-1 and the moved end conducting rod 3-1 of 2-2 and the separating brake position of 3-2 are located by splitting lock cushioning backstay 6 two ends by motion rod member 5-1 and 5-2 in two straight line keepers.

The utility model double break mouth vacuum fling-cut switch can be a monopolar configuration, also can be multi-polar structure.

The rate of restriking when compared with prior art, the beneficial effects of the utility model also are to cut-off capacitance current is far below the requirement of 2 grades of circuit breaker standard C.Owing to reduced the vacuum interrupter breaking speed, also be significantly improved the mechanical endurance of product.

The technical solution of the utility model and the unjust concrete structure that is confined to the foregoing description, can also obtain many different concrete schemes according to design of the present utility model, as two the vacuum interrupter 2-1 and the 2-2 that are contained in control box 7 both sides, high-pressure vacuum switch top also can be arranged vertically; The separating brake position of moved end conducting rod 3-1 and 3-2 also can be by position-limiting tube by two straight line keeper 5-1 and 5-2, and perhaps stopper slot is located, and change that these are small and equivalent transformation all should be included within the described scope of claim.

Claims

1, double break mouth vacuum fling-cut switch, an one pole comprises: control box (7), two vacuum interrupter (2-1,2-2), two switching-in spring (4-1,4-2), two straight line keeper (5-1,5-2), two vacuum interrupter (2-1,2-2) the splitting lock cushioning backstay (6) of moved end, strut porcelain bushing pipe (10), drive system pull bar (9), operating mechanism (11) and underframe (12) is characterized in that:

Be contained in described double break mouth live drop and cut two vacuum interrupter (2-1 that close the described control box in top (7) both sides, moved end conducting rod (3-1 2-2), 3-2) with two straight line keeper (5-1, the center line of the motion rod member 5-2) is on same straight line, the coaxial separately from each other connection that is nested in their termination, and 5-20mm slidably;

(5-1,5-2) (8-1's other end of the motion rod member in 8-2) links to each other with two connecting levers on drive system pull bar (9) top respectively for two straight line keepers.

2, according to the described double break mouth of claim 1 vacuum fling-cut switch, it is characterized in that:

Two vacuum interrupters (2-1, (3-1, (5-1,5-2) moved end conducting rod 2-2) is located by splitting lock cushioning backstay (6) two ends by two straight line keepers in separating brake position 3-2) by the motion rod member in.