CN203367075U

CN203367075U - Anti-misoperation device of breaker control loop

Info

Publication number: CN203367075U
Application number: CN 201320450767
Authority: CN
Inventors: 贺华军; 董小萍; 刘蜀江; 李章云
Original assignee: Beihai Galaxy Switch Devices Co Ltd
Current assignee: Beihai Galaxy Switch Devices Co Ltd
Priority date: 2013-07-27
Filing date: 2013-07-27
Publication date: 2013-12-25
Anticipated expiration: 2023-07-27

Abstract

The utility model discloses an anti-misoperation device of a breaker control loop. The anti-misoperation device of the breaker control loop relates to the medium-high voltage electric appliance manufacture technology field, and comprises a clapboard, a back plate, a connecting rod and a closing coil. The clapboard is equipped with an upper interlocking plate composed of an ejector pin, a compressed spring and an upper return spring, and a lower interlocking plate equipped with a lower return spring. One end of the lower interlocking plate is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the upper end of a connecting plate. A microswitch is connected with the back plate, and one end of an auxiliary contact of the microswitch is connected with one end of the closing coil. The anti-misoperation device of the breaker control loop can solve the problems that a breaker happens the false closing, the closing coil is burnt out, and potential safety hazards exist.

Description

The anti-misoperation apparatus of breaker control circuit

Technical field

The utility model relates to mesohigh electrical equipment manufacturing technology field, especially a kind of anti-misoperation apparatus of breaker control circuit of spring-operated.

Background technology

At present, in using the mesohigh circuit breaker of spring mechanism as operating mechanism, in order to prevent the misoperation of breaker control circuit, prevent from burning closing coil, keep the integrity of closing circuit, need to mechanical interlocks be set in circuit breaker operation mechanism inside; Existing this class device is as " a kind of circuit breaker interlocking device " (license notification number CN201498907U), and this interlock is only applicable to the withdraw-type circuit breaker, when circuit breaker cart, during in off-position or test position, forbids breaker closing; Perhaps when circuit breaker during in "on" position, forbid that handcart advances to release, prevent that the on-load mistake from drawing, mistake pushes away circuit breaker.But this device is not suitable for fixed breaker, is of limited application.And existing mechanical interlocks, all the closing coil of operating mechanism inside is not carried out to locking, not protection closing coil from electric.When interlocking mechanically breaks down can not work smoothly the time, due to electric upper not protection fully, now to closing circuit, energising will make the closing coil misoperation, causes the circuit breaker false switching, or burns closing coil, has the problem of potential safety hazard.

Summary of the invention

The purpose of this utility model is to provide a kind of anti-misoperation apparatus of breaker control circuit, and it can solve the circuit breaker false switching, burns closing coil, has the problem of potential safety hazard.

In order to address the above problem, the technical solution used in the present invention is: the anti-misoperation apparatus of this breaker control circuit, comprise dividing plate, backboard, connecting rod and closing coil, the upper interlock plate consisted of push rod, stage clip and upper reset spring is installed on described dividing plate and is provided with the lower interlock plate of lower back-moving spring, one end of described lower interlock plate is connected with an end of described connecting rod, and the other end of described connecting rod is connected with the upper end of connecting plate; Sensitive switch is connected with backboard, and an end of the auxiliary contact of described sensitive switch is connected with an end of described closing coil.

In technique scheme, more specifically scheme can also be: the lower end of described connecting plate has connecting hole.

Owing to having adopted technique scheme; the utility model compared with prior art; the beneficial effect had is: due to the anti-misoperation apparatus that has adopted this breaker control circuit; realized preventing more reliably the mechanical interlocking of misoperation in circuit breaker operation mechanism inside; not only make from machinery circuit breaker and other switchgears interlock; prevent misoperation, also, from the electric damage of having avoided closing coil, protected closing coil.Simultaneously, this utility model is applicable to handcart type breaker and fixed breaker, applies more extensive.

The accompanying drawing explanation

Fig. 1 is the front view of the anti-misoperation apparatus of breaker control circuit.

Fig. 2 is the cutaway view at A in Fig. 1-A place.

Fig. 3 is the electric control theory schematic diagram of closing circuit of circuit breaker.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail:

The anti-misoperation apparatus of the breaker control circuit of Fig. 1, Fig. 2 and Fig. 3, the upper interlock plate 5 consisted of push rod 10, stage clip 7 and upper reset spring 6 is arranged on dividing plate 17 by guide finger 18, and back-moving spring 6 use steady pins 8 are fixed on interlock plate 5; Back-moving spring 13 use steady pins 12 are fixed on lower interlock plate 14, and the lower interlock plate 14 that lower back-moving spring 13 is installed is arranged on dividing plate 17 by guide finger 19; Lower interlock plate 14 is by connecting rod 20 and connecting plate 15 interlocks; Sensitive switch 4 is fixed on the backboard of circuit breaker operation mechanism by bent plate 3 is installed, and the contact that makes sensitive switch 4 down and be arranged on the top of interlock plate 5, when upper interlock plate 5 moves upward, the contact that can withstand sensitive switch 4 makes its action, thereby the normally closed auxiliary contact S of sensitive switch 4 is disconnected, cut off the circuit of closing coil HQ.As shown in Figure 3 ,+KM is positive source, and-KM is power cathode.

In the time will making breaker closing, combined floodgate plate 1 moves inwards, promotes the combined floodgate bent plate 16 on combined floodgate semiaxis 2, and the semiaxis 2 that makes to close a floodgate is rotated counterclockwise, and then the drive associated components makes breaker closing; When circuit breaker after "on" position, cam on main shaft 11 withstands the lower end of push rod 10, and push rod 10 up pushes up upper interlock plate 5 by pin 9 and stage clip 7, makes interlock plate 5 block combined floodgate bent plate 16, forbid continuing to press combined floodgate plate 1, prevented from from machinery closing circuit breaker by mistake; Simultaneously, the contact that upper interlock plate 5 is pushed down sensitive switch 4 makes auxiliary switch action, forbids continuing the energising to closing coil HQ, from electric, has prevented that mistake from closing circuit breaker.In addition, cam on breaker main shaft 11 has also been pushed down time interlock plate 14 downwards, by connecting rod 20, connecting plate 15 also is depressed simultaneously simultaneously, now, interlocking annex on the moving external handcart type breaker of the pore area of connecting plate 15 by lower end can forbid that handcart shakes into shaking out in the combined floodgate situation, reaches and prevents misoperation; At other embodiment, while being installed on fixed breaker as this cover interlock, connecting plate 15 can be forbidden disconnecting switch operation or earthing under the breaker closing state by the moving external interlocking annex of the pore area of lower end, forbids that the on-load mistake is divided, mistake is closed isolating switch or the on-load mistake is closed earthing.

When needs locking breaker closing, connecting plate 15 moves upward under the effect of external interlocking annex, drive interlock plate 14 down and move upward, and then on jack-up, interlock plate 5 moves upward, and finally makes interlock plate 5 block combined floodgate bent plate 16, the No switching on circuit breaker.

When not needing locking, back-moving spring 6 resets interlock plate 5; Back-moving spring 13 resets lower interlock plate 14.

This device can be mechanically above interlocked to circuit breaker operation mechanism with electric simultaneously, has prevented reliably the misoperation to closing circuit of circuit breaker.In addition, owing to having installed sensitive switch additional, its auxiliary contact are sealed in to the closing circuit of circuit breaker, effectively avoided the misdelivery electricity to closing coil, avoid burning closing coil.

Claims

1. the anti-misoperation apparatus of a breaker control circuit, comprise dividing plate (17), backboard, connecting rod (20) and closing coil, it is characterized in that: the upper interlock plate (5) consisted of push rod (10), stage clip (9) and upper reset spring (6) and the lower interlock plate (14) that is provided with lower back-moving spring (13) are installed on described dividing plate (17), one end of described lower interlock plate (14) is connected with an end of described connecting rod (20), and the other end of described connecting rod (20) is connected with the upper end of connecting plate (15); Sensitive switch (4) is connected with backboard, and an end of the auxiliary contact of described sensitive switch (4) is connected with an end of described closing coil.

2. the anti-misoperation apparatus of breaker control circuit according to claim 1, it is characterized in that: the lower end of described connecting plate (15) has connecting hole.