CN210575718U

CN210575718U - High-voltage vacuum circuit breaker with key lock with brake opening and closing prohibiting functions

Info

Publication number: CN210575718U
Application number: CN201921268929.7U
Authority: CN
Inventors: 许海忠; 陈佳成; 葛小平; 王民军
Original assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Current assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-05-19
Anticipated expiration: 2029-08-07

Abstract

The utility model relates to a high-pressure vacuum circuit breaker especially relates to a high-pressure vacuum circuit breaker of floodgate function key lock is banned in area separating brake. The circuit breaker comprises a circuit breaker body, the circuit breaker body in be equipped with circuit breaker mechanism, the circuit breaker body in be equipped with and be electrical connection's closing coil with the circuit breaker body. Further improving the safety.

Description

High-voltage vacuum circuit breaker with key lock with brake opening and closing prohibiting functions

Technical Field

The utility model relates to a high-pressure vacuum circuit breaker especially relates to a high-pressure vacuum circuit breaker of floodgate function key lock is banned in area separating brake.

Background

When electric power is overhauled, a switch-on breaker is operated by mistake, so that casualty accidents caused by power transmission of a line occur. In the power system of the two-inlet one-bus connection of the power grid, the three circuit breakers are simultaneously switched on to cause power accidents easily due to misoperation. The operating program is controlled only by a system means to ensure safety, obviously, accidents cannot be avoided, and the problems need to be solved from the technical means.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve exist not enough among the prior art, provide a compact structure, vacuum circuit breaker after the separating brake locking guarantees at the separating brake state to locking hand-operated machine combined floodgate and electric line combined floodgate, taking off the key, if need unblock separating brake locking must with the key unblock. Under the unlocking state, the circuit breaker recovers to be normal, and a key cannot be taken down.

The above technical problem of the present invention can be solved by the following technical solutions:

a high-voltage vacuum circuit breaker with a key lock with a function of switching off, switching on and switching off comprises a circuit breaker body, wherein a circuit breaker mechanism is arranged in the circuit breaker body, and a switching-on coil electrically connected with the circuit breaker body is arranged in the circuit breaker body;

the circuit breaker mechanism comprises a lever, a key lock and a travel switch, the key lock rotates to drive a key lock ejector rod to move upwards, the key lock ejector rod drives the lever to rotate, a reset spring fixed with the circuit breaker body is arranged at the other end of the lever, the key lock ejector rod drives the travel switch to move upwards, and the travel switch and a closing coil loop are movably connected in series.

Preferably, the left end of the lever is provided with a tripping half shaft cantilever fixed with the breaker body, and the middle end of the lever is provided with a rotating shaft rotatably connected with the breaker body.

Preferably, the breaker body is provided with arc-shaped adjusting holes, and the opening half shaft cantilever adjusts displacement along the adjusting holes.

Preferably, the circuit breaker body is provided with a bracket fixed with the key lock, and the outer wall of the circuit breaker body is provided with a closing button for controlling the opening and closing of the closing coil.

Has the following advantages: 1. the vacuum circuit breaker has the advantages of simple structure and low manufacturing cost, avoids the error switching-on of the vacuum circuit breaker, ensures the switching-off state, and simultaneously locks the manual mechanical switching-on and the electric loop switching-on; 2. the interlocking device can meet the requirement that in a two-inlet one-bus power system, at most, only two circuit breakers are switched on, and reliably and safely meets the interlocking requirement of a plurality of circuit breakers.

The utility model has simple structure and low manufacturing cost, can conveniently and effectively fix the program lock on the vacuum circuit breaker, and lock the vacuum circuit breaker to be incapable of switching on under the switching-off state; and the interlocking requirement of a plurality of circuit breakers can be met by combined use of the circuit breakers.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the brake-separating locking state of the present invention;

fig. 3 is a schematic view of the unlocking state of the present invention.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1: as shown in the figure, the high-voltage vacuum circuit breaker with the key lock with the functions of opening, closing and closing comprises a circuit breaker body 1, wherein a circuit breaker mechanism 2 is arranged in the circuit breaker body 1, and a closing coil 3 electrically connected with the circuit breaker body 1 is arranged in the circuit breaker body 1;

the circuit breaker mechanism 2 include lever 4, key lock 5 and travel switch 6, key lock 5 rotate and drive key lock ejector pin 13 upwards displacement, key lock ejector pin 13 drive lever 4 rotatory, the other end of lever 4 be equipped with circuit breaker body 1 looks fixed reset spring 7, key lock ejector pin 13 drive travel switch 6 upwards displacement, travel switch 6 be movable concatenating with closing coil 3 return circuit.

The left end of lever 4 be equipped with circuit breaker body 1 fixed separating brake semi-axis cantilever 8 mutually, the middle-end of lever 4 be equipped with circuit breaker body 1 mutually rotate the pivot 9 of being connected.

The breaker body 1 in be equipped with and be arc distribution's regulation hole 10, separating brake semi-axis cantilever 8 adjust the displacement along regulation hole 10.

The circuit breaker comprises a circuit breaker body 1 and is characterized in that a support 11 fixed with a key lock 5 is arranged in the circuit breaker body 1, and a closing button 12 for controlling the opening and closing of a closing coil 3 is arranged on the outer wall of the circuit breaker body 1.

As shown in fig. 3, is in an unlocked state, in which the normal use of the vacuum circuit breaker is not affected; fig. 2 shows an opening and locking state, in which the circuit breaker is forcibly opened and the mechanical closing and electrical closing loops are locked to ensure that the circuit breaker cannot be closed. The working principle is as follows: the key is rotated anticlockwise to drive the key lock ejector rod to rise, and the lever is pushed to rotate around the rotating shaft. The lever presses the opening semi-axis cantilever to move downwards, and the opening semi-axis rotates to enable the vacuum circuit breaker to release and open. The switching-off semi-axis rotates simultaneously, drives the combined floodgate push rod downstream, makes combined floodgate semi-axis and combined floodgate push rod break away from, and the manual switching-on button that presses this moment, because of combined floodgate semi-axis and combined floodgate push rod break away from, vacuum circuit breaker can't close a floodgate, guarantees that vacuum circuit breaker can not close a floodgate in the switching-off state. The lever presses the travel switch simultaneously in the rotating process, the normally closed point of the travel switch is disconnected, and the normally closed point of the travel switch is connected in series in the loop of the closing coil, so that the closing loop is disconnected, and the vacuum circuit breaker can not be electrically closed through the closing coil. Under the locking state of separating brake, the key can be taken down, and the vacuum circuit breaker without the key can not be switched on, so that the safety of maintainers and equipment can be ensured. When the unlocking is needed, the key is rotated clockwise to drive the key lock ejector rod to descend, the lever moves clockwise and upwards under the action of the reset spring, the travel switch resets, the opening half shaft cantilever resets, the locking state of the vacuum circuit breaker is released, the vacuum circuit breaker can be normally operated in an opening and closing mode, and the key 12 is locked and cannot be taken down at the moment. When the high-voltage vacuum circuit breaker is used for a power system with two inlet wires and one bus coupler in the same way, the three high-voltage vacuum circuit breakers with the key locks with the functions of switching off and switching on are only provided with two keys, so that the situation that at most two vacuum circuit breakers can be switched on can be ensured, and major power accidents are prevented from being caused by misoperation.

Claims

1. The utility model provides a take high-pressure vacuum circuit breaker of function key lock that opens and shuts and close a floodgate which characterized in that: the circuit breaker comprises a circuit breaker body (1), wherein a circuit breaker mechanism (2) is arranged in the circuit breaker body (1), and a closing coil (3) electrically connected with the circuit breaker body (1) is arranged in the circuit breaker body (1);

breaker mechanism (2) include lever (4), key lock (5) and travel switch (6), key lock (5) rotate and drive key lock ejector pin (13) upwards displacement, key lock ejector pin (13) drive lever (4) rotatory, the other end of lever (4) be equipped with reset spring (7) fixed mutually with circuit breaker body (1), key lock ejector pin (13) drive travel switch (6) upwards displacement, travel switch (6) be movable concatenating with combined floodgate coil (3) return circuit.

2. The high-voltage vacuum circuit breaker with the key lock with the functions of opening, closing and switching off as claimed in claim 1, wherein: the left end of lever (4) be equipped with circuit breaker body (1) fixed separating brake semi-axis cantilever (8) mutually, the middle-end of lever (4) be equipped with circuit breaker body (1) looks rotation connection's pivot (9).

3. The high-voltage vacuum circuit breaker with the key lock with the functions of opening, closing and switching off as claimed in claim 2, wherein: the breaker body (1) in be equipped with regulation hole (10) that are the arc and distribute, separating brake semi-axis cantilever (8) adjust the displacement along regulation hole (10).

4. The high-voltage vacuum circuit breaker with the key lock with the functions of opening, closing and switching off as claimed in claim 1, wherein: the circuit breaker is characterized in that a support (11) fixed with a key lock (5) is arranged in the circuit breaker body (1), and a closing button (12) for controlling the closing coil (3) to be opened and closed is arranged on the outer wall of the circuit breaker body (1).