CN2935418Y

CN2935418Y - Breaker group with interlocking device

Info

Publication number: CN2935418Y
Application number: CN 200620124714
Authority: CN
Inventors: 张爱军
Original assignee: CHINT GROUP Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2006-07-03
Filing date: 2006-07-03
Publication date: 2007-08-15
Anticipated expiration: 2016-07-03

Abstract

A circuit breaker group with interlock device, in particular to a breaker group that can realize mechanical arbitrary interlock and unlock between two or more breakers, in the breaker group, each break is provided with an interlock device, the interlock device has a base plate 5, a driving rod 80, a control rod 8, two control arms 27, 28, three pullback springs 10, 11, 12 and six cable ropes 13, 14, 15,16,17,18, the two cable ropes connecting with two ends of the driving rod of two breakers are respectively connected with a control arm of the other two breaks.

Description

Circuit breaker group with interlock

Technical field

The utility model relates to a kind of circuit breaker group with interlock, particularly a kind of chain circuit breaker group of mechanical type that can be used between at least three circuit breakers.

Background technology

In the distribution system of multiloop power supply, a circuit breaker all is equipped with in each loop, and between loop and loop, be provided with the circuit breaker that normally disconnects as interconnection switch or circuit switching, if after failing because of powering and open circuit in one of them loop, described circuit breaker as interconnection switch or circuit switching is closure, so that guarantee that the multiloop electric power system of described circuit-breaker is installed and the proper operation and the normal power supply of the load that links to each other with described circuit breaker.

In actual applications, for ensuring safety, require circuit-breaker to carry out its normal running function some miscellaneous functions in addition, for example, described comprise interconnection switch or circuit switching with between the circuit breaker group of circuit breaker except the needs electrical interlocks, also need to have the mechanical type chain function between two or more circuit breakers.

Be to realize the phase interconnected lock between the circuit breaker group, the mechanical chain method and apparatus that prior art adopts has that key is chain, lever is chain and wirerope is chain, and they are named with the Motion Transmission media.The shortcoming of the mechanical type interlocked circuit breaker device that the present key that adopts is chain is: remove chain must manually going to the scene and operate, can not satisfy the requirement of automation control.

In the prior art, the mechanical chain circuit breaker that also has has adopted the chain or wirerope interlock of lever, perhaps also made up the key interlock, the shortcoming of these devices is can only realize two circuit breakers chain, if be used for chain between three circuit breakers, then can not realize combination in any.In addition, under present state of the art, the interlock of known circuit breaker although required operating function can be provided, still has the deficiency of some shortcomings or aspect of performance.

The patent No. is 971259542 patent of invention, a kind of switches set with interlock is disclosed, the mechanical type interlock of this known technology discloses following technical characterictic: each switch all has a flexibly mounted wobble-member, each wobble-member is operably connected with the device of an energy locking phase inductive switch, and each switch all has a drive unit that links to each other with the two ends of two cables.Because the wobble-member of this known mechanical interlocking device of being made up of wobble-member and cable is flexibly mounted, so its Installation and Debugging difficulty is bigger, repetitive positioning accuracy and resistance to shock are relatively poor, for with the direct-connected wobble-member of trigger, the problem of its repetitive positioning accuracy and resistance to shock difference, the functional reliability that has a strong impact on switch is with stable.

Specifically, because the active force of the locking trigger of the prior art directly is the pulling force of cable, the mobile of wobble-member is to rely on the moving axially of wirerope in the cable to realize, thereby the positioning accuracy request to cable assembly is very high, has caused problems such as debug difficulties, production efficiency are low, processing cost height.And because in use, be difficult to avoid occurring wirerope and connect problems such as loosening distortion, wirerope are subjected to extend behind the pulling force, and these problems have directly been destroyed the positioning accuracy of cable assembly, make lock operation malfunctioning, have had a strong impact on security of products, reliability, stability and useful life.

The utility model content

The purpose of this utility model, be to overcome above-mentioned prior art defective, a kind of circuit breaker group with improved mechanical interlocking device is provided, this circuit breaker can satisfy the requirement of automation control, can realize the combination in any of chain between a plurality of circuit breakers/release again, with the operating function that the satisfies actual needs different requirements chain to product.

Another free-revving engine of the present utility model is, overcome the structural principle defective of the breaker mechanical interlocking mechanism existence of prior art, a kind of fail safe, stability, good reliability are provided, and operation and debugging make things convenient for, production cost is low, the circuit breaker group with interlock of long service life.

To achieve these goals, the utility model has adopted following technical scheme.

Circuit breaker group with interlock of the present utility model, it comprises at least three circuit breakers and six roots of sensation cable at least, each circuit breaker in the described circuit breaker group all has interlock, interconnect and transmission of drive force by means of cable between the interlock of each circuit breaker, each interlock comprises driver part, control assembly, Lock Part, base plate and cable means; The base plate of described interlock is provided with at least one control lever, at least one drive rod, at least two control arms and three flexible members; Described drive rod operationally is connected with driving mechanism on the circuit breaker; Described control lever is connected with the trigger of breaker lockout device; The wirerope of two cables that is connected the drive rod two ends of described any circuit breaker links to each other with a control arm of two other circuit breaker respectively; Described control arm is finished the limit movement of control lever or is lifted restrictions under the acting in conjunction of described wirerope pulling force and described flexible member elastic force; Described control lever under the elastic force effect of described flexible member, is finished the locking to the lock shaft of circuit breaker automatically after the limit movement of removing from control arm.

Driver part described in the utility model has a drive rod, and the two ends of drive rod have the bindiny mechanism of accepting cable, and by this bindiny mechanism drive rod is connected with two cables; There is an axle vertical with drive rod the centre of described drive rod, this a end is fixedlyed connected with drive rod, centre and the access hole on the base plate of axle flexibly connects, and the other end of axle opens circuit with the manipulation circuit breaker of base plate back/and the drive unit of closure is connected; Described control assembly comprises two control arms, and an end of each control arm has a hole, and this hole flexibly connects with the axle that is fixed on the base plate, and control arm can be rotated around the axle center; The other end of each control arm is fixedlyed connected with the wirerope of cable, and this wirerope is delivered to the actuating force of drive rod the control arm of two other circuit breaker; One extension spring is installed on each control arm, and the other end of extension spring is connected with base plate, and the pulling force of extension spring is opposite with the direction of pull of wirerope; Described control assembly has a control lever, and there are two boss at the two ends of control lever, fixedlys connected with an axle in the middle of the control lever; Described axle flexibly connects with access hole on the base plate, makes the control lever can be around this axle center rotation, and the described other end passes base plate, can be connected to the trigger of the circuit breaker of base plate back.One extension spring is housed on described control lever, and the other end of extension spring is fixedlyed connected with base plate; Under the acting in conjunction of the pulling force of the pulling force of the extension spring on the control lever and the wirerope on the control arm, can make the boss on the described control lever keep in touch or not contact with the side of control arm; Described cable is made up of wirerope and noose, and wirerope is in the middle of noose, and after the noose two ends were fixed, the pulling wirerope made wirerope and noose produce axial displacement, thereby realized the remote function of transmitting axial motion; Described cable means, one end of its wirerope is fixed in the end of drive rod of some circuit breakers of circuit breaker group, the other end of wirerope is fixed in the end of control arm of another circuit breaker of circuit breaker group, and the two ends of noose are separately fixed on the base plate corresponding to fixing two circuit breakers of wirerope.

Adopt the circuit breaker group of mechanical interlocking device of the present utility model, when the drive unit of one of them circuit breaker of handling the circuit breaker group, the drive rod that drive unit drives on this circuit breaker rotates, two wirerope tensions that are connected the drive rod two ends are ordered about in the rotation of drive rod, two wireropes by tension, the side of the control arm of two other circuit breaker of driving circuit breaker group breaks away from the boss of control lever, thereby remove restriction to target circuit breaker control lever, the control lever that makes the target circuit breaker is realized the chain of desired circuit breaker group under the tension of extension spring; Otherwise, when wirerope loosens, because the extension spring effect on the control arm, control arm is resetted and contact, thereby realize the release of desired circuit breaker group with boss on the control lever.According to the utility model, after cable interconnects each circuit breaker of circuit breaker group by the method for attachment of setting, by setting opening circuit/closure of each circuit breaker, can realize the combination arbitrarily of a plurality of circuit-breaker status, for example in three circuit breakers behind any two breaker closings, the 3rd circuit breaker can not close a floodgate.

Description of drawings

Narrate embodiment of the present utility model by accompanying drawing below:

Fig. 1 is the end view with interconnective three circuit breaker embodiment of interlock of the present utility model;

Fig. 2 is the structural representation of second circuit breaker shown in Figure 1;

Fig. 3 is mounted in

control arm

27,28 that is not subjected to other circuit breaker drive unit transmission influence on second circuit breaker and the structural representation that is subjected to the control lever 8 of limit movement;

Fig. 4 is the stereogram of control lever 8 shown in Figure 3;

Fig. 5 and Fig. 6 are the schematic diagrames that the drive rod 80 of first circuit breaker is in two kinds of positions;

Fig. 7 is to be subjected to the

control arm

27,28 of second circuit breaker after the driving of other different circuit breaker drive units and the final position schematic diagram of control lever 8 to Fig. 9.

Embodiment

Below in conjunction with specific embodiment of the utility model shown in the drawings, further describe the embodiment with circuit breaker group of interlock described in the utility model.

A following embodiment is the circuit breaker group of being made up of three circuit breakers of the present utility model, with this operation principle and the advantage of interlock of the present utility model is described.The circuit breaker group that the utility model relates to is not limited to the circuit breaker group be made up of three circuit breakers.

As shown in Figure 1, circuit breaker group of the present utility model is made up of

circuit breaker

1,2,3.On three circuit breakers, each circuit breaker all has an interlock 4.Each interlock all has a base plate 5, drive rod 80 and three

extension springs

10,11,12.In three interlocks, also comprise:

control arm

25,26,27,28,29,30, control lever 7,8,9,

cable

13,14,15,16,17,18.The wirerope of cable 13 1 ends is fixedlyed connected with the left end of the drive rod 80 of second circuit breaker 2, and the other end is fixedlyed connected with the left control arm 25 of first circuit breaker 1.The wirerope of cable 14 1 ends is fixedlyed connected with the right-hand member of the drive rod 80 of the 3rd circuit breaker 3, and the other end is fixedlyed connected with the right control arm 26 of first circuit breaker 1.The wirerope of cable 15 1 ends is fixedlyed connected with the left end of the drive rod 80 of first circuit breaker 1, and the other end is fixedlyed connected with the right control arm 28 of second circuit breaker 2.The wirerope of cable 16 1 ends is fixedlyed connected with the left end of the drive rod 80 of the 3rd circuit breaker 3, and the other end is fixedlyed connected with the control arm 27 of second circuit breaker 2.The wirerope of cable 17 1 ends is fixedlyed connected with the right-hand member of the drive rod of second circuit breaker 2, and the other end is fixedlyed connected with the left control arm 29 of the 3rd circuit breaker 3.The wirerope of cable 18 1 ends is fixedlyed connected with the right-hand member of the drive rod 80 of first circuit breaker 1, and the other end is fixedlyed connected with the right control arm 30 of the 3rd circuit breaker 3.The two ends of the noose of

cable

13,14,15,16,17,18 are fixedly connected with the base plate 5 of corresponding interlock respectively.The structure of the interlock 4 of each circuit breaker in the circuit breaker group is identical with operating principle, for the sake of simplicity and avoid repetition, is that example is described with the interlock 4 of second circuit breaker 2 only below.

From Fig. 2, Fig. 3, Fig. 4 as seen, interlock 4 is fixing with the side plate 6 of circuit breaker by base plate 5.Be parallel to base plate 5 control lever 8 is set, the centre of control lever 8 has one 60, and axle 60 flexibly connects with a hole of base plate 5.There are two

boss

35,36 at the two ends of control lever 8, and the right-hand member appropriate location is connected with extension spring 10.When restrictive condition was eliminated fully, under the effect of extension spring 10, control lever 8 can be around the rotation of the axle center of axle 60.The shape of control lever 8 is illustrated by Fig. 4.The drive rod that marks with collectivity mark 80 is 22 at first label that opens circuit in 1, and the label in second circuit breaker 2 is 23, and the label in the 3rd circuit breaker 3 is 24.Described drive rod 80 is arranged on the base plate 5 abreast, fixedlys connected with one in the centre of drive rod 80, and axle flexibly connects with a hole of base plate 5.The other end of axle operationally is connected with the many triggers or the indicating device trigger of the drive unit of circuit breaker, for example: link to each other with the main shaft of the operating mechanism that is fixed in circuit breaker 2.The left end of drive rod 80 is fixedlyed connected with the wirerope of cable 13, and right-hand member is fixedlyed connected with the wirerope of cable 17.Parallel and base plate 5 are provided with two control arms 27,28.One end of

control arm

27,28 has a hole, and this hole flexibly connects with the axle that is fixed on the base plate 5.The other end of control arm 27 is fixedlyed connected with the wirerope of cable 16 by a roller, and middle suitable position is connected with extension spring 11.The other end of control arm 28 is fixedlyed connected with the wirerope of cable 15, and middle suitable position is fixedlyed connected with extension spring 12.The other end of

extension spring

11,12 is connected with base plate 5 respectively.Each end of the noose of

cable

13,15,16,17 is all fixing with thread terminal and base plate 5.

Below with Fig. 1, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, the operation principle of the utility model interlocking gear is described.

When all three

circuit breakers

1,2,3 all are shown in an open position, control arm 27 tops are subjected to the pulling force of extension spring 11, the below is subjected to the pulling force of wirerope 16, when its residing position can make the boss 35 on the control lever 8 touch its side, control lever 8 contacts (referring to Fig. 9) or does not contact (referring to Fig. 8) with locking device 71, can not exert an influence to reliable combined floodgate of circuit breaker at least.Control arm 28 belows are subjected to the pulling force of extension spring 10, the top is subjected to the pulling force of wirerope 15, when its residing position can make the boss 36 on the control lever 8 touch its side, control lever 8 contacted or does not contact with lock shaft 71, can not exert an influence to reliable combined floodgate of circuit breaker at least.

When for example having only first circuit breaker 1 to close a floodgate, the drive rod 22 of first circuit breaker 1 rotates to 110 positions, thereby strains wirerope 15,18 (see figure 6)s with pulling force 115.Because pulling force 115 strained wirerope 15, so that the control arm 28 of second circuit breaker 2 turns clockwise (seeing Fig. 1 and Fig. 8), eliminate the restriction that it rotatablely moves to control lever 8.Because be controlled arm 27 restrictions, control lever 8 still keeps with lock shaft 71 certain distance being arranged, and can not influence the reliable combined floodgate of circuit breaker 2 at least.

When for example having only the 3rd circuit breaker 3 to close a floodgate, the 3rd circuit breaker 3 drive rods 24 are strained wireropes 16 with pulling force 120, thereby make the control arm 27 of second circuit breaker do rotation (seeing Fig. 1 and Fig. 7) in a clockwise direction, eliminate the restriction that it rotatablely moves to control arm 8.Owing to be controlled arm 28 restrictions, control arm 8 still keeps with the axle 71 of locking device certain distance being arranged, and can not influence the reliable combined floodgate of circuit breaker 2 at least.

When for example first circuit breaker 1 and the 3rd circuit breaker 3 all close a floodgate, the drive unit of

circuit breaker

1,3 will make

drive rod

22,24 rotations, thereby with pulling force 125,126

tensions

15,16,18,14 (see figure 9)s.Because

wirerope

15,16 tensions are moved,

control arm

27,28 is all done and is moved clockwise, and they are eliminated the restriction that rotatablely moves of control lever 8, control lever 8 is under the effect of extension spring 10, be rotated counterclockwise, contact, prevented closing of second circuit breaker 2 with the axle 71 of locking device.

In a kind of identical mode, promptly under the situation that the second and the

3rd circuit breaker

2,3 is closed, also can lock first circuit breaker 1, and when first and

second circuit breakers

1,2 are closed, equally also can lock the 3rd circuit breaker 3.

From embodiment and accompanying drawing as seen, design feature of the present utility model is: when control lever 8 contacted with lock shaft 71, control lever 8 was in the contact conditions state; Control lever 8 is provided by spring 10 with the contact force of lock shaft 71, and being different from prior art is provided by the pulling force of wirerope; Control lever 8 has adopted bearing support structure, and its resetting, resistance to shock all are much higher than elastic supporting mechanism.Because the utility model design feature has guaranteed that circuit breaker group of the present utility model has following significant effect: fail safe, stability, good reliability, the operation debugging is convenient, simple in structure, production cost is low, long service life, and is of many uses etc.

Claims

1. circuit breaker group with interlock, it comprises at least three circuit breakers (1,2,3) and six roots of sensation cable (13,14,15,16,17,18) at least, each circuit breaker in the described circuit breaker group all has interlock (4), interconnect and transmission of drive force by means of cable between the interlock of each circuit breaker

It is characterized in that:

Each interlock comprises driver part, control assembly, Lock Part, base plate and cable means;

The base plate (5) of described interlock (4) is provided with at least one control lever (8), at least one drive rod (80), at least two control arms and three flexible members;

Described control lever (8) is connected with the trigger of breaker lockout device;

Described drive rod (80) operationally is connected with driving mechanism on the circuit breaker;

The wirerope of two cables that is connected drive rod (80) two ends of described any circuit breaker links to each other with a control arm of two other circuit breaker respectively;

Described control arm is finished the limit movement of control lever (8) or is lifted restrictions under the acting in conjunction of described wirerope pulling force and described flexible member elastic force;

Described control lever (8) under the elastic force effect of described flexible member, is finished the locking of the lock shaft (71) to circuit breaker automatically after the limit movement of removing from control arm.

2. circuit breaker group according to claim 1, it is characterized in that: the two ends of described drive rod (80) have the structure of accepting wirerope, and an axle that inserts base plate (5) is arranged on the described drive rod (80), this axle matches with the corresponding hole on the base plate (5), and this drive rod (80) can be rotated on the plane that is parallel to base plate (5).

3. circuit breaker group according to claim 1 is characterized in that: an end of described control arm has a hole, and this hole flexibly connects with the axle that is fixed on the base plate (5), and this control arm can be swung on the plane that is parallel to base plate (5); Described each control arm is connected with flexible member with wirerope respectively, makes it under the acting in conjunction of described wirerope pulling force and described flexible member elastic force, finishes the limit movement of control lever (8) or lifts restrictions.

4. circuit breaker group according to claim 1, it is characterized in that: there is an axle that inserts base plate (5) centre of described control lever (8), this axle matches with the corresponding hole on the base plate (5), and this control lever (8) can be rotated on the plane that is parallel to base plate (5); The motion of control lever (8) is limited because of its two ends are subjected to stopping.

5. circuit breaker group according to claim 1 is characterized in that: described cable comprises wirerope, noose, thread terminal and wirerope termination, and wirerope penetrates noose movably, noose two ends threaded end, and there is termination at the wirerope two ends; Noose is fixedlyed connected with base plate (5) by means of thread terminal; Wirerope is fixedlyed connected with drive rod, control arm by means of termination.

6. circuit breaker group according to claim 1, it is characterized in that: described flexible member is extension spring, sheet spring or torsion spring, the one end is connected with control arm or control lever, the other end is connected with base plate (5), and the elastic force that described flexible member acts on the control arm is opposite with the direction of pull of wirerope; The elastic force direction that described flexible member acts on the control lever (8) is parallel with base plate (5).

7. according to any described circuit breaker group among the claim 1-5, it is characterized in that, should have following annexation between drive rod (80), control arm (25) and the cable, the wirerope (15,18) that is connected drive rod (22) two ends of first circuit breaker (1) is connected with the control arm (28) of second circuit breaker (2), the control arm (30) of the 3rd circuit breaker (3) respectively; The wirerope (13,17) that is connected drive rod (23) two ends of second circuit breaker (2) is connected with the control arm (25) of first circuit breaker (1), the control arm (29) of the 3rd circuit breaker (3) respectively; The wirerope (16,14) that is connected drive rod (24) two ends of the 3rd circuit breaker (3) is connected with the control arm (27) of second circuit breaker (2), the control arm (26) of first circuit breaker (1) respectively.

8. according to claim 3 or 4 described circuit breaker groups, it is characterized in that: described control lever 8 directly contacts with control arm, does not promptly have transition element between them.

9. according to claim 3 or 4 described circuit breaker groups, it is characterized in that: on control lever (8) or control arm, have a transition element that is used to contact at least, as boss, link stopper, bearing pin etc.

10. according to claim 3 or 4 described circuit breaker groups, it is characterized in that: transition element is not passed through in being connected between flexible member and control arm or the control lever.

11., it is characterized in that: between flexible member and control arm or the control lever, connect this element such as post, hook, platform etc. at least by a transition element according to claim 3 or 4 described circuit breaker groups.

12., it is characterized in that according to any described circuit breaker group among the claim 2-5: the supporting system between described base plate (5) and drive rod (80), control arm or the control lever (8) be the supporting of hole-axle or, the supporting of axle-hole or, groove-axle supports or, axle-groove supports; The axle center of described axle is vertical with the plane of base plate (5).

13. circuit breaker group according to claim 7, it is characterized in that: described wirerope is directly to be connected with being connected of drive rod (80) or control arm, perhaps connect described transition element such as bearing pin, axle sleeve, hook, roller by at least one transition element.