阅读说明：本技术 一种高压开关的控制装置 (Control device of high-voltage switch ) 是由 赵敬辉 丁建忠 杨微玉 于 2021-11-11 设计创作，主要内容包括：本发明涉及高压输电技术领域,本发明公开了一种高压开关的控制装置,包括防尘箱,还包括：驱动机构,安装于所述防尘箱的内腔底部；定位机构,安装于所述防尘箱的内腔后侧右端；分合机构,数量为三个,从左至右等距安装于所述防尘箱的上表面；保护机构,安装于所述防尘箱的右侧壁。本发明转轴具备自锁功能,防止误操作使高压断路器再次启动,避免造成相关设备损坏或人员触电,安全性高,而且,可实现动触头区域的双重密封,密封性能稳定,可防止高压断路器内部出现泄漏,进而使高压断路器具保持良好的阻燃性能,灭弧性能得到保证,避免引起火灾,延长其使用寿命。(The invention relates to the technical field of high-voltage power transmission, and discloses a control device of a high-voltage switch, which comprises a dustproof box and also comprises: the driving mechanism is arranged at the bottom of the inner cavity of the dust-proof box; the positioning mechanism is arranged at the right end of the rear side of the inner cavity of the dust-proof box; the three separating and combining mechanisms are arranged on the upper surface of the dustproof box at equal intervals from left to right; and the protection mechanism is arranged on the right side wall of the dustproof box. The rotating shaft has a self-locking function, prevents the high-voltage circuit breaker from being restarted due to misoperation, avoids damage to related equipment or electric shock of personnel, is high in safety, can realize double sealing of a moving contact region, is stable in sealing performance, can prevent leakage in the high-voltage circuit breaker, further enables the high-voltage circuit breaker to keep good flame retardant performance, guarantees arc extinguishing performance, avoids causing fire disasters, and prolongs the service life of the high-voltage circuit breaker.)

1. The utility model provides a high tension switchgear's controlling means, includes dust proof box (1), its characterized in that still includes:

the driving mechanism (2) is arranged at the bottom of the inner cavity of the dust-proof box (1);

the positioning mechanism (3) is arranged at the right end of the rear side of the inner cavity of the dust-proof box (1);

the three separating and combining mechanisms (4) are arranged on the upper surface of the dustproof box (1) at equal intervals from left to right;

the protection mechanism (5) is installed on the right side wall of the dust-proof box (1);

the drive mechanism (2) comprises:

the motor (21) is arranged at the bottom end of the left side of the dust-proof box (1);

one end of the rotating shaft (22) is locked at the output end of the motor (21) through a coupler, the other end of the rotating shaft is connected with the right side of the inner cavity of the dust-proof box (1) through a bearing, and the right end of the rotating shaft (22) extends out of the right side wall of the dust-proof box (1);

the two swing rods (23) are respectively arranged on the left side and the right side of the outer wall of the rotating shaft (22);

the ratchet wheel (24) is arranged on the right side of the outer wall of the rotating shaft (22) and is positioned on the right side of the swing rod (23);

the supporting rod (25) is arranged at the front end of the inner side of the swing rod (23);

the number of the connecting rods (26) is three, and the connecting rods are sleeved on the outer wall of the supporting rod (25) from left to right at equal intervals;

the scroll (27) is arranged at the right end of the outer wall of the rotating shaft (22), and the scroll (27) is positioned on the right side wall of the dust-proof box (1);

the rotary table (28) is mounted at the right end of the outer wall of the rotating shaft (22), the rotary table (28) is located on the right side of the reel (27), and a positioning groove (29) is formed in the outer wall of the rotary table (28);

the positioning mechanism (3) comprises:

the mounting plate (31) is mounted at the right end of the rear side of the inner cavity of the dust-proof box (1);

the supporting frame (32) is fixedly connected to the bottom end of the front side of the mounting plate (31);

the electromagnet (33) is arranged on the top of the support frame (32);

a pawl (34) rotatably mounted to the front bottom end of the mounting plate (31) by a pin;

one end of the first spring (35) is installed at the top of the front side of the installation plate (31), and the other end of the first spring is fixedly connected with the rear side of the pawl (34);

the opening and closing mechanism (4) includes:

the limiting cylinder (41) is arranged at the top of the dustproof box (1);

the piston (42) can be inserted into the inner cavity of the limiting cylinder (41) in a vertically sliding manner;

a plurality of sealing rings (43) are sleeved on the outer wall of the piston (42) from top to bottom;

the push rod (44) is fixedly connected to the bottom end of the piston (42), and the bottom end of the push rod (44) and the top end of the connecting rod (26) are rotatably installed through a pin shaft;

the moving contact (45) is arranged at the top end of the piston (42), and the moving contact (45) extends out of the upper surface of the limiting cylinder (41);

one end of the telescopic pipe (46) is fixedly connected to the top of the outer wall of the moving contact (45), and the other end of the telescopic pipe is fixedly connected with the upper surface of the limiting cylinder (41).

2. A control device of a high voltage switch according to claim 1, characterized in that: the electromagnet (33) is positioned right below the pawl (34).

3. A control device of a high voltage switch according to claim 1, characterized in that: the quantity of sealing washer (43) is three at least, from last to distributing in the equidistance down in the outer wall of piston (42).

4. A control device of a high voltage switch according to claim 1, characterized in that: the protection mechanism (5) comprises:

a protective cover (51) mounted on the right side wall of the dust-proof box (1);

the number of the guide rails (52) is two, and the guide rails are respectively fixedly connected to the left end and the right end of the front side of the inner cavity of the protective cover (51);

a balancing weight (53) which is embedded in the inner cavity of the guide rail (52) in a vertically sliding manner;

the pull rope (54) is wound on the outer wall of the reel (27), and one end of the pull rope is connected with the top end of the balancing weight (53) in a binding mode;

a snap assembly (55) mounted on the front side of the protective cover (51);

the rocking handle (56) is rotatably arranged on the right side of the protective cover (51), and the left side of the rocking handle (56) is fixedly connected with the right end of the rotating shaft (22).

5. A control device of a high voltage switch according to claim 4, characterized in that: the snap-action assembly (55) comprises:

a sleeve (551) attached to the front side of the protective cover (51);

a second spring (552) embedded in the front side of the inner cavity of the sleeve (551);

one end of the positioning pin (553) is embedded in the rear side of the inner cavity of the sleeve (551), and the other end of the positioning pin (553) is inserted into the inner cavity of the positioning groove (29) to brake the rotary disc (28) under the action of the second spring (552);

and one end of the pull rod (554) is arranged at the front end of the positioning pin (553), and the other end of the pull rod extends out of the inner cavity of the sleeve (551).

6. A control device of a high voltage switch according to claim 5, characterized in that: the rear side of the positioning pin (553) is conical.

Technical Field

The invention relates to the technical field of high-voltage power transmission, in particular to a control device of a high-voltage switch.

Background

The high-voltage circuit breaker (or called high-voltage switch) not only can cut off or close the no-load current and load current in the high-voltage circuit, but also can cut off the overload current and short-circuit current by the action of the relay protection device when the system has a fault, and has quite perfect arc extinguishing structure and enough current breaking capacity, and can be divided into: oil circuit breakers (multiple oil circuit breakers, less oil circuit breakers), sulfur hexafluoride circuit breakers (SF 6 circuit breakers), compressed air circuit breakers, vacuum circuit breakers, etc. The high-voltage circuit breaker mainly comprises a flow guide part, an arc extinguishing part, an insulating part and an operating part;

the high voltage circuit breaker is generally classified into a vacuum, oil-rich or oil-poor type to perform an arc extinguishing function, but no matter which type of high voltage circuit breaker, an operation part is not separated. The operation control part mainly comprises a circuit protection element and a mechanical transmission element, and once the circuit protection element finds the problems of overload, open circuit and the like, the mechanical transmission element can break the moving contact and the static contact to realize circuit protection. However, the existing mechanical transmission element does not have a self-locking function of a rotating shaft, once a worker has misoperation, the high-voltage circuit breaker is started again, related equipment is easily damaged or an electric shock accident is easily caused, the safety is poor, and the moving contact moves in a region, the leakage is easily caused by repeated action, the sealing line is poor, so that the arc extinguishing function is reduced, and a fire disaster is easily caused.

Disclosure of Invention

The invention aims to provide a control device of a high-voltage switch, which at least solves the problems that a mechanical transmission element of a high-voltage circuit breaker in the prior art does not have self-locking capability, cannot avoid misoperation of dangerous workers, is poor in safety, is difficult to ensure tightness and is reduced in arc extinguishing capability.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high tension switchgear's controlling means, includes the dust proof box, still includes: the driving mechanism is arranged at the bottom of the inner cavity of the dust-proof box; the positioning mechanism is arranged at the right end of the rear side of the inner cavity of the dust-proof box; the three separating and combining mechanisms are arranged on the upper surface of the dustproof box at equal intervals from left to right; the protection mechanism is arranged on the right side wall of the dust-proof box;

the drive mechanism includes: the motor is arranged at the bottom end of the left side of the dust-proof box; one end of the rotating shaft is locked at the output end of the motor through a coupler, the other end of the rotating shaft is connected with the right side of the inner cavity of the dust-proof box through a bearing, and the right end of the rotating shaft extends out of the right side wall of the dust-proof box; the two swing rods are respectively arranged on the left side and the right side of the outer wall of the rotating shaft; the ratchet wheel is arranged on the right side of the outer wall of the rotating shaft and is positioned on the right side of the oscillating bar; the supporting rod is arranged at the front end of the inner side of the oscillating rod; the number of the connecting rods is three, and the connecting rods are sleeved on the outer wall of the supporting rod from left to right at equal intervals; the scroll is arranged at the right end of the outer wall of the rotating shaft and is positioned on the right side wall of the dust-proof box; the rotary table is arranged at the right end of the outer wall of the rotating shaft, the rotary table is positioned on the right side of the scroll, and a positioning groove is formed in the outer wall of the rotary table;

the positioning mechanism includes: the mounting plate is mounted at the right end of the rear side of the inner cavity of the dust-proof box; the supporting frame is fixedly connected to the bottom end of the front side of the mounting plate; the electromagnet is arranged at the top of the support frame; the pawl is rotatably arranged at the bottom end of the front side of the mounting plate through a pin shaft; one end of the first spring is mounted at the top of the front side of the mounting plate, and the other end of the first spring is fixedly connected with the rear side of the pawl;

the opening and closing mechanism includes: the limiting cylinder is arranged at the top of the dustproof box; the piston can be inserted into the inner cavity of the limiting cylinder in a vertically sliding manner; the number of the sealing rings is a plurality, and the sealing rings are sleeved on the outer wall of the piston from top to bottom; the push rod is fixedly connected to the bottom end of the piston, and the bottom end of the push rod and the top end of the connecting rod are rotatably installed through a pin shaft; the moving contact is arranged at the top end of the piston and extends out of the upper surface of the limiting cylinder; one end of the telescopic pipe is fixedly connected to the top of the outer wall of the moving contact, and the other end of the telescopic pipe is fixedly connected with the upper surface of the limiting cylinder.

Preferably, the electromagnet is located directly below the pawl.

Preferably, the number of the sealing rings is at least three, and the sealing rings are distributed on the outer wall of the piston from top to bottom in an equal distance.

Preferably, the protection mechanism comprises: the protective cover is arranged on the right side wall of the dust-proof box; the number of the guide rails is two, and the guide rails are respectively and fixedly connected to the left end and the right end of the front side of the inner cavity of the protective cover; the balancing weight can be embedded in the inner cavity of the guide rail in a vertically sliding manner; the pull rope is wound on the outer wall of the reel, and one end of the pull rope is connected with the top end of the balancing weight in a binding mode; the clamping assembly is arranged on the front side of the protective cover; the rocking handle rotatably install in the right side of safety cover, the left side of rocking handle and the right-hand member fixed connection of pivot.

Preferably, the click assembly includes: a sleeve mounted on a front side of the protective cover; the second spring is embedded in the front side of the inner cavity of the sleeve; one end of the positioning pin is embedded in the rear side of the inner cavity of the sleeve, and the other end of the positioning pin is inserted into the inner cavity of the positioning groove under the action of the second spring to brake the turntable; and one end of the pull rod is arranged at the front end of the positioning pin, and the other end of the pull rod extends out of the inner cavity of the sleeve.

Preferably, the rear side of the locating pin is conical.

The control device of the high-voltage switch has the advantages that:

1. according to the invention, the positioning pin can be moved to the front side to be separated from the positioning groove by pulling the pull rod, the brake on the rotary table is relieved, the positioning pin can be inserted into the positioning groove by utilizing the elastic force of the second spring, and the brake of the rotary shaft is further realized, so that the rotary shaft has a self-locking function, the high-voltage circuit breaker is prevented from being restarted due to misoperation, the damage of related equipment or the electric shock of personnel is avoided, and the safety is high;

2. according to the invention, the rotating shaft can be driven to rotate anticlockwise by the motor, so that the supporting rod swings upwards, the connecting rod is pushed to drive the push rod to move upwards, the piston and the moving contact are driven to move upwards, the sealing ring seals between the piston and the limiting cylinder, the telescopic pipe seals between the moving contact and the limiting cylinder, when the moving contact is in contact with a fixed contact of a high-voltage circuit breaker, the main circuit is switched on, the electromagnet is electrified to generate magnetism, the magnetic force drives the pawl to move downwards to be lapped on the ratchet wheel to brake the rotating shaft, so that the switching-on is realized, during actual use, double sealing of the moving contact area can be realized, the sealing performance is stable, leakage in the high-voltage circuit breaker can be prevented, the high-voltage circuit breaker can keep good flame retardant performance, the arc extinguishing performance is ensured, a fire is avoided, and the service life of the high-voltage circuit breaker is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side sectional view of the present invention;

FIG. 3 is an enlarged view of the invention at A;

FIG. 4 is a front sectional view of the clutch mechanism of the present invention;

FIG. 5 is a right side sectional view of the protection mechanism of the present invention;

FIG. 6 is an enlarged view of the invention at B.

In the figure: 1. the dust-proof box comprises a dust-proof box body, 2, a driving mechanism, 21, a motor, 22, a rotating shaft, 23, a swing rod, 24, a ratchet wheel, 25, a supporting rod, 26, a connecting rod, 27, a scroll, 28, a rotary disc, 29, a positioning groove, 3, a positioning mechanism, 31, a mounting plate, 32, a supporting frame, 33, an electromagnet, 34, a pawl, 35, a first spring, 4, a separating and combining mechanism, 41, a limiting cylinder, 42, a piston, 43, a sealing ring, 44, a push rod, 45, a movable contact, 46, a telescopic pipe, 5, a protection mechanism, 51, a protective cover, 52, a guide rail, 53, a balancing weight, 54, a pull rope, 55, a clamping component, 551, a sleeve, 552, a second spring, 553, a positioning pin, 554, a pull rod, 56 and a rocking handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a control device of a high-voltage switch comprises a dust-proof box 1, wherein the dust-proof box 1 is installed on a base of a high-voltage circuit breaker and keeps a sealed state, the control device further comprises a driving mechanism 2, a positioning mechanism 3, a separating and combining mechanism 4 and a protection mechanism 5, the driving mechanism 2 is installed at the bottom of an inner cavity of the dust-proof box 1, the positioning mechanism 3 is installed at the right end of the rear side of the inner cavity of the dust-proof box 1, the separating and combining mechanisms 4 are three and are installed on the upper surface of the dust-proof box 1 at equal intervals from left to right, and the protection mechanism 5 is installed on the right side wall of the dust-proof box 1;

the driving mechanism 2 comprises a motor 21, a rotating shaft 22, a swinging rod 23, a ratchet wheel 24, a supporting rod 25, a connecting rod 26, a scroll 27, a turntable 28 and a positioning groove 29, the motor 21 is installed at the bottom end of the left side of the dust-proof box 1, the motor 21 is electrically connected with a high-voltage circuit breaker control system and is used for driving the rotating shaft 22 to rotate clockwise or anticlockwise, one end of the rotating shaft 22 is locked at the output end of the motor 21 through a coupler, the other end of the rotating shaft 22 is connected with the right side of the inner cavity of the dust-proof box 1 through a bearing, the right end of the rotating shaft 22 extends out of the right side wall of the dust-proof box 1, the two swinging rods 23 are respectively installed at the left side and the right side of the outer wall of the rotating shaft 22, the ratchet wheel 24 is installed at the right side of the outer wall of the rotating shaft 22 and is positioned at the right side of the swinging rod 23, the three supporting rods 26 are equidistantly sleeved on the outer wall of the supporting rod 25 from left to right, the connecting rods 26 can convert the rotating motion of the supporting rod 25 into the linear motion of the push rod 44, the scroll 27 is arranged at the right end of the outer wall of the rotating shaft 22, the winding and releasing of the pull rope 54 are realized through the rotation of the scroll 27, the scroll 27 is positioned on the right side wall of the dust-proof box 1, the turntable 28 is arranged at the right end of the outer wall of the rotating shaft 22, the turntable 28 is positioned on the right side of the scroll 27, and the outer wall of the turntable 28 is provided with a positioning groove 29;

the positioning mechanism 3 comprises a mounting plate 31, a support frame 32, an electromagnet 33, a pawl 34 and a first spring 35, the mounting plate 31 is mounted at the right end of the rear side of the inner cavity of the dustproof box 1, the support frame 32 is fixedly connected with the bottom end of the front side of the mounting plate 31, the electromagnet 33 is mounted at the top of the support frame 32, the electromagnet 33 is electrically connected with a closed loop of a high-voltage circuit breaker control system, when the closed loop is closed, the electromagnet 33 is electrified to work, the pawl 34 can move downwards by the generated magnetic force, the pawl 34 is lapped on a ratchet wheel 24 to brake a rotating shaft 22, the pawl 34 is rotatably mounted at the bottom end of the front side of the mounting plate 31 through a pin shaft, one end of the first spring 35 is mounted at the top of the front side of the mounting plate 31, the other end of the first spring is fixedly connected with the rear side of the pawl 34, the first spring is a tension spring, generates elastic deformation after being stretched or extruded, and recovers to an initial state after external force is removed, the pawl 34 can be swung upwards under the action of the pulling force;

the separating and combining mechanism 4 comprises a limiting cylinder 41, a piston 42, a sealing ring 43, a push rod 44, a movable contact 45 and an extension tube 46, wherein the limiting cylinder 41 is arranged at the top of the dustproof box 1 and limits the piston 42 to ensure that the piston 42 can linearly move up and down, the piston 42 can be inserted into an inner cavity of the limiting cylinder 41 in a vertically sliding manner, the up-and-down moving distance of the piston 42 in the limiting cylinder 41 is constant, further, the moving distance of the connecting rod 26 can be limited, the movable contact 45 is prevented from excessively rising to collide with a static contact of a high-voltage circuit breaker, the number of the sealing rings 43 is a plurality, the sealing rings are sleeved on the outer wall of the piston 42 from top to bottom to seal between the piston 42 and the limiting cylinder 41 to prevent the high-voltage circuit breaker from leaking, the push rod 44 is fixedly connected to the bottom end of the piston 42, the bottom end of the push rod 44 and the top end of the connecting rod 26 are rotatably arranged through a pin shaft, the movable contact 45 is arranged at the top end of the piston 42, and the movable contact 45 extends out of the upper surface of the limiting cylinder 41, one end of the telescopic pipe 46 is fixedly connected to the top of the outer wall of the movable contact 45, the other end of the telescopic pipe 46 is fixedly connected with the upper surface of the limiting cylinder 41, and the telescopic pipe 46 can move along with the movable contact 45 to perform telescopic motion, so that sealing between the movable contact 45 and the limiting cylinder 41 is realized.

Preferably, the electromagnet 33 is located right below the pawl 34, and when the electromagnet is powered, the magnetic force generated by the electromagnet 33 can attract the pawl 34 to move downwards, so that the control force of the electromagnet 33 on the pawl 34 is ensured.

As a preferred scheme, furthermore, the number of the sealing rings 43 is at least three, and the sealing rings are equidistantly distributed on the outer wall of the piston 42 from top to bottom, so that multi-stage sealing is formed between the piston 42 and the limiting cylinder 41, and the sealing effect is improved.

Preferably, the protection mechanism 5 includes a protection cover 51, a guide rail 52, a weight 53, a pull rope 54, a locking component 55 and a rocking handle 56, the protection cover 51 is mounted on the right side wall of the dust-proof box 1, the number of the guide rails 52 is two, the two guide rails are respectively fixedly connected to the left end and the right end of the front side of the inner cavity of the protection cover 51, the weight 53 is limited to ensure the stable vertical movement of the weight 53, the weight 53 is vertically slidably embedded in the inner cavity of the guide rail 52, the pull rope 54 can pull the reel 27 to rotate clockwise under the gravity action of the weight 53, so as to realize the clockwise rotation of the rotating shaft 22, the pull rope 54 is wound on the outer wall of the reel 27, one end of the pull rope is connected with the top end of the weight 53, the locking component 55 is mounted on the front side of the protection cover 51, the rocking handle 56 is rotatably mounted on the right side of the protection cover 51, the left side of the rocking handle 56 is fixedly connected with the right end of the rotating shaft 22, the crank 56 is turned in order to manually control the rotation of the shaft 22.

Preferably, the locking assembly 55 includes a sleeve 551, a second spring 552, a positioning pin 553, and a pull rod 554, the sleeve 551 is installed at the front side of the protecting cover 51, the second spring 552 is embedded in the front side of the inner cavity of the sleeve 551, the second spring 552 is a rotating spring, and is elastically deformed after being stretched or squeezed, and returns to an initial state after the external force is removed, the positioning pin 553 is driven to move backward by the elastic force of the rotating spring, one end of the positioning pin 553 is embedded in the rear side of the inner cavity of the sleeve 551, the other end of the positioning pin 553 is inserted into the inner cavity of the positioning slot 29 to brake the rotating disc 28 under the action of the second spring 552, one end of the pull rod 554 is installed at the front end of the positioning pin 553, and the other end of the pull rod 554 extends out of the inner cavity of the sleeve 551.

Preferably, the rear side of the positioning pin 553 has a conical shape, and when the rotation of the rotation plate 28 causes the positioning groove 29 to pass through the positioning pin 553, the positioning pin 553 is inserted in alignment with the positioning groove 29.

The detailed connection means is a technique known in the art, and the following mainly describes the working principle and process, and the specific operation is as follows.

Step one, installing a dustproof box 1 on a high-voltage circuit breaker base, enabling a movable contact 45 to be located right below a fixed contact of the high-voltage circuit breaker, electrically connecting a motor 21 with a high-voltage circuit breaker control system through a wire, and electrically connecting an electromagnet 33 with a closed loop of the high-voltage circuit breaker through the wire to complete installation of the device;

step two, when the switch needs to be switched on, the pull rod 554 is pulled forward, the positioning pin 553 is enabled to move forward and extrude the second spring 552, until the positioning pin 553 moves out of the positioning groove 29, the braking on the rotating shaft 22 is released, the motor 21 is controlled by the control unit to drive the rotating shaft 22 to rotate anticlockwise, the ratchet wheel 24, the reel 27 and the turntable 28 rotate anticlockwise along with the rotating shaft 22, the reel 27 winds the pull rope 54, the counterweight block 53 moves upwards, meanwhile, the oscillating rod 23 drives the supporting rod 25 to swing upwards, the connecting rod 26 pushes the push rod 44 to move upwards, the piston 42 drives the movable contact 45 to move upwards, the telescopic pipe 46 seals the movable contact 45 primarily, the sealing ring 43 seals between the piston 42 and the limiting cylinder 41 to realize secondary sealing, until the movable contact 45 is contacted with the fixed contact, the closed loop of the high-voltage circuit breaker is closed, the electromagnet 33 is electrified to work, and the pawl 34 is attracted by magnetic force to move downwards, the pawl 34 is further lapped on the ratchet wheel 24 to brake the rotating shaft 22, so that the connecting rod 26 is kept at the current position to realize closing;

step three, when the phenomena of overload, circuit break and the like occur in the main circuit of the high-voltage circuit breaker, the closed circuit is disconnected, the electromagnet 33 loses magnetic force, the first spring 35 pulls the pawl 34 to move upwards under the action of self-pulling force, the pawl 34 is separated from the ratchet wheel 24, the counterweight block 53 pulls the pull rope 54 under the action of self gravity to make the reel 27 rotate clockwise, the rotating shaft 22 rotates in the same direction, the connecting rod 26 moves downwards, the piston 42 drives the moving contact 45 to move downwards to be separated from the static contact until the positioning groove 29 on the rotating disc 28 rotates to be opposite to the positioning pin 553, the second spring 552 pushes the positioning pin 553 to be inserted into the positioning groove 29 by using the elasticity of the second spring 552 to brake the rotating disc 28, the circuit break protection is completed, and the motor 21 can be prevented from driving the rotating shaft 22 to be started again;

this device can realize that moving contact 45 clearance two-stage is sealed, prevents the inside leakage of high voltage circuit breaker, guarantees the arc extinguishing ability, prevents that electric arc from arousing the conflagration, opens circuit the back at the main circuit moreover, can realize the braking of carousel 28, prevents high voltage circuit breaker maloperation and restart once more, protective apparatus and personnel safety, and the security is high, more does benefit to the popularization.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.