CN110729141B

CN110729141B - High-voltage cabinet circuit breaker opening and closing operating rod device and installation method thereof

Info

Publication number: CN110729141B
Application number: CN201911022905.8A
Authority: CN
Inventors: 周兴武
Original assignee: Hubei Edian Cuiyu Electrical Appliance Co ltd
Current assignee: Hubei Edian Cuiyu Electrical Appliance Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2022-07-01
Anticipated expiration: 2039-10-25
Also published as: CN110729141A

Abstract

The invention discloses a high-voltage cabinet circuit breaker opening and closing operating rod device and an installation method thereof. This high-voltage board circuit breaker divide-shut brake action bars device and installation method thereof, through rotating the action bars, can drive the horizontal pole, rotate with L type dwang together, and then can directly promote the plug-in switch to rotate and realize the divide-shut brake, and the cover that rotates can the horizontal slip, and then can realize the divide-shut of L type dwang and plug-in switch, then can make the operation invalid after separately, and then avoided the equipment trouble that the manual maloperation leads to, and the action bars need not to dismantle, can leave on the high-voltage board chamber door always, the loss problem of action bars has been avoided, and convenient to use.

Description

High-voltage cabinet circuit breaker opening and closing operating rod device and mounting method thereof

Technical Field

The invention relates to the technical field of operating levers, in particular to a high-voltage cabinet circuit breaker opening and closing operating lever device and an installation method thereof.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The breaker can be used to distribute electric energy, start asynchronous motor infrequently, protect power supply circuit and motor, and automatically cut off circuit when they have serious overload or short circuit and undervoltage faults, and it is equivalent to the combination of fuse switch and over-and-under-heat relay. Furthermore, no parts need to be changed after breaking the fault current. At present, it has been widely used. Distribution of electricity is an extremely important link in the generation, transmission and use of electricity. The distribution system comprises a transformer and various high-low voltage electrical equipment, and the low-voltage circuit breaker is an electrical appliance with a large using amount.

The pull rod is an insulating tool for operating live equipment in a short time, such as turning on or off a high-voltage isolating switch, dropping a fuse and the like. The brake pull rod (also known as an insulated operating rod, an insulating rod, a high-voltage operating rod, a commonly-known multi-purpose brake rod) can be divided into a 10KV insulated operating rod, a 35KV insulated operating rod, a 110KV insulated operating rod, a 220KV insulated operating rod, a 330KV insulated operating rod and a 500KV insulated operating rod according to the voltage grade.

The divide-shut brake of circuit breaker generally is after closing the door in the current high-voltage board, stretches into the door with the action bars and operates the circuit breaker in, and it is comparatively inconvenient to operate in narrow and small space, appears the problem to inaccurate easily, and is comparatively troublesome, just can take out when just the action bars uses, puts at ordinary times and appears losing the problem on one side easily.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a high-voltage cabinet circuit breaker opening and closing operating rod device and an installation method thereof, and solves the problems that the circuit breaker is operated by extending an operating rod into a door, the operation is inconvenient in a narrow space, the alignment is easy to occur, the operation is troublesome, the operating rod can be taken out when in use, and the operating rod is easy to lose when being placed on one side at ordinary times.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a high-voltage board circuit breaker divide-shut brake action bars device, includes circuit breaker, high-voltage board chamber door and action bars, the bottom of action bars runs through the high-voltage board chamber door and extends to the rear side of high-voltage board chamber door, the front of circuit breaker is rotated and is connected with the knife switch, the bottom fixedly connected with horizontal pole of action bars, the surface of horizontal pole just is located the left side cover of action bars and is equipped with and rotates the cover, rotate the rear side fixedly connected with L type dwang of cover surface, and the front end of knife switch set up with the bayonet socket of L type dwang looks adaptation, the left end fixedly connected with prism piece of horizontal pole, and the inside of just rotating the cover set up with prism piece sliding connection's prism type spout.

Preferably, the top cover of action bars surface is equipped with the pulling cover, the internal surface of pulling cover just is located the top fixedly connected with spacing ring of action bars.

Preferably, a spring is movably connected to the left side of the prism block inside the rotating sleeve, and a pull rope is fixedly connected to the left side of the inner surface of the rotating sleeve.

Preferably, the top end of the pull rope penetrates through the prism block, the cross rod, the operating rod and the limiting ring in sequence and extends to the upper part of the limiting ring, and the top end of the pull rope is fixedly connected with the limiting piece.

Preferably, the top end of the surface of the operating rod is fixedly connected with a short rod, and the side surface of the pulling sleeve is provided with a sliding groove which is connected with the short rod in a sliding manner.

Preferably, the surface of the cross rod and the two sides of the operating rod are both sleeved with positioning sleeves, the front surfaces of the positioning sleeves are fixedly connected with the back surface of the door of the high-voltage cabinet, and the positioning sleeves are fixedly connected with limiting rods which are positioned between the positioning sleeves and positioned on the front side of the operating rod.

Preferably, the front of the high-voltage board box door and the outer part of the operating rod are provided with a storage groove, the inner surface of the storage groove and the two sides of the operating rod are fixedly connected with elastic clamping blocks, and the right side of the inner surface of the storage groove is rotatably connected with a rotating cover.

The invention also discloses an installation method of the high-voltage cabinet circuit breaker opening and closing operating rod device, which specifically comprises the following steps:

step one, opening a brake: after the door of the high-voltage cabinet is closed, if the breaker is to be disconnected, the rotating cover can be opened, the operating rod is pulled out to incline, the operating rod is kept in contact with the limiting rod and cannot be pulled continuously, the horizontal section of the L-shaped rotating rod is flush with the bayonet of the knife switch, then the pulling sleeve is pushed upwards, the pulling rope is pulled by the pulling sleeve, the rotating sleeve is indirectly pulled rightwards, the L-shaped rotating rod is inserted into the bayonet, the short rod slides out of the sliding groove, then the pulling sleeve is rotated to slide to the bottom of the pulling sleeve to support the L-shaped rotating rod, then the operating rod can be pushed back into the storage groove, the cross rod, the rotating sleeve and the L-shaped rotating rod are driven to rotate together, the knife switch is pressed down to realize opening, finally the pulling sleeve is horizontally pushed to rotate until the short rod is rotated, the compressed spring rebounds at the moment, the rotating sleeve, the L-shaped rotating rod and the pulling sleeve are reset, then the rotary cover is covered;

step two, closing a switch: earlier upwards promote the pulling cover, utilize pulling cover pulling stay cord, indirectly will rotate the cover and stimulate right, make L type dwang insert in the bayonet socket, the quarter butt can the roll-off spout this moment, then rotate the pulling cover, make and slide to pulling cover bottom and live it, pull out the action bars forward again, make L type dwang upwards promote knife switch, make the circuit breaker combined floodgate alright, then rotate the pulling cover, until will rotate to the quarter butt position alright, the spring resilience of compressed this moment, make and rotate the cover, L type dwang resets with the pulling cover, push back the action bars again and deposit in the recess, cover at last and rotate the lid alright.

Advantageous effects

The invention provides a high-voltage cabinet circuit breaker opening and closing operating rod device and an installation method thereof. Compared with the prior art, the method has the following beneficial effects:

(1) the switch-on and switch-off operating rod device of the high-voltage cabinet circuit breaker and the installation method thereof are characterized in that a knife switch is connected in a rotating mode on the front face of the circuit breaker, a cross rod is fixedly connected to the bottom end of the operating rod, a rotating sleeve is sleeved on the outer surface of the cross rod and positioned on the left side of the operating rod, an L-shaped rotating rod is fixedly connected to the rear side of the outer surface of the rotating sleeve, a bayonet matched with the L-shaped rotating rod is arranged at the front end of the knife switch, a prism block is fixedly connected to the left end of the cross rod, a prism-shaped sliding groove in sliding connection with the prism block is arranged in the rotating sleeve, the cross rod can be driven to rotate together with the L-shaped rotating rod by rotating the operating rod, the knife switch can be directly pushed to rotate to realize switch-on and switch-off, the rotating sleeve can slide left and right, so that the switch-on and switch-off of the L-shaped rotating rod and the knife switch can be realized, the switch-on and switch-off of the high-voltage cabinet circuit breaker can be disabled by manual misoperation after being separated, so as to avoid equipment faults caused by misoperation, the operating rod does not need to be detached and can be stored on the door of the high-voltage cabinet all the time, so that the problem of loss of the operating rod is avoided, and the use is convenient.

(2) The high-voltage cabinet circuit breaker opening and closing operating rod device and the installation method thereof are characterized in that a pulling sleeve is sleeved at the top end of the outer surface of an operating rod, a limiting ring is fixedly connected to the inner surface of the pulling sleeve and positioned above the operating rod, a spring is movably connected to the inner part of a rotating sleeve and positioned on the left side of a prism block, a pull rope is fixedly connected to the left side of the inner surface of the rotating sleeve, the top end of the pull rope sequentially penetrates through the prism block, a cross rod, the operating rod and the limiting ring and extends to the upper part of the limiting ring, and the top end of the pull rope is fixedly connected with a limiting piece, the rotating sleeve can be pulled to move rightwards by arranging the pulling sleeve to be matched with the pull rope for use, the L-shaped rotating rod can be adjusted to move into the bayonet of the knife switch, the circuit breaker can be operated at the moment, after the pulling sleeve is loosened, the rotating sleeve can be reset by the elasticity of the spring, and the operation is disconnected, so that the device can be operated by one hand and is convenient to use.

(3) This high-voltage board circuit breaker divide-shut brake action bars device and mounting method thereof, through the top fixedly connected with quarter butt on the action bars surface, and the side of pulling cover set up with quarter butt sliding connection has the spout, use through set up the spout on the quarter butt cooperation pulling cover on the action bars, rotate the pulling cover again after last pulling cover makes the quarter butt break away from the spout, then usable quarter butt blocks the pulling cover, maintain the state of tightening up of stay cord, need not to keep the power of pulling this moment, can directly carry out the operation of divide-shut brake, and it is laborsaving convenient to use.

(4) This high-voltage board circuit breaker divide-shut brake action bars device and installation method thereof, all overlap and be equipped with the position sleeve through the surface at the horizontal pole and the both sides that are located the action bars, and the back fixed connection of the front of position sleeve and high-voltage board chamber door, just be located the front side fixedly connected with gag lever post of action bars between two position sleeves, set up position sleeve mountable location horizontal pole, and set up the gag lever post between the position sleeve, can restrict action bars pivoted angle, so that the bayonet socket of alignment knife switch that L type dwang can be accurate, and can protect knife switch, avoid exerting oneself too greatly and damage knife switch.

(5) This high-voltage board circuit breaker divide-shut brake action bars device and mounting method thereof, through just being located the outside of action bars and offering at the front of high-voltage board chamber door and deposit the recess, deposit the internal surface of recess and be located the equal fixedly connected with elasticity fixture block in both sides of action bars, the right side of depositing the recess internal surface is rotated and is connected with the rotation lid, set up and deposit recess cooperation rotation lid, can be used to deposit and protect the action bars, if necessary still can increase the lock and pin the rotation lid, avoid irrelevant personnel maloperation.

Drawings

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a cross-sectional view of a portion of the structure of the present invention;

FIG. 3 is a schematic view of the structure of the pulling sleeve and the sliding groove of the present invention;

FIG. 4 is an enlarged view of a portion of the invention at A in FIG. 2;

fig. 5 is a front view of the door of the high voltage cabinet of the present invention.

In the figure, 1-circuit breaker, 2-high-voltage cabinet door, 3-operating rod, 4-knife switch, 5-rotating cover, 6-rotating sleeve, 7-cross rod, 8-L-shaped rotating rod, 9-bayonet, 10-prism block, 11-prism slide groove, 12-pulling sleeve, 13-limiting ring, 14-spring, 15-pull rope, 16-limiting piece, 17-short rod, 18-slide groove, 19-positioning sleeve, 20-storage groove and 21-limiting rod.

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. 1-5, an embodiment of the present invention provides a technical solution: a high-voltage cabinet circuit breaker opening and closing operating rod device comprises a circuit breaker 1, a high-voltage cabinet door 2 and an operating rod 3, wherein a storage groove 20 is formed in the front of the high-voltage cabinet door 2 and located outside the operating rod 3, elastic clamping blocks 22 are fixedly connected to the inner surface of the storage groove 20 and located on two sides of the operating rod 3 respectively, the elastic clamping blocks 22 have elasticity and can clamp the operating rod 3 to prevent the operating rod 3 from automatically transferring and falling down, a rotating cover 5 is rotatably connected to the right side of the inner surface of the storage groove 20, the storage groove 20 is arranged to be matched with the rotating cover 5 and can be used for storing and protecting the operating rod 3, a lock can be added to lock the rotating cover 5 as necessary to prevent the operating rod 3 from being mistakenly operated by irrelevant personnel, a pulling sleeve 12 is sleeved on the top end of the outer surface of the operating rod 3, a limiting ring 13 is fixedly connected to the inner surface of the pulling sleeve 12 and located above the operating rod 3, and a short rod 17 is fixedly connected to the top end of the surface of the operating rod 3, the side surface of the pulling sleeve 12 is provided with a sliding groove 18 which is connected with the short rod 17 in a sliding way, the short rod 17 is arranged on the operating rod 3 to be matched with the sliding groove 18 on the pulling sleeve 12 for use, the pulling sleeve 12 is rotated after the short rod 17 is separated from the sliding groove 18 by pulling the pulling sleeve 12 upwards, the pulling sleeve 12 can be clamped by the short rod 17, the tightening state of the pull rope 15 is maintained, the opening and closing operation can be directly carried out without maintaining the pulling force at the moment, the use is labor-saving and convenient, the bottom end of the operating rod 3 penetrates through the high-voltage cabinet door 2 and extends to the rear side of the high-voltage cabinet door 2, the front surface of the circuit breaker 1 is rotatably connected with a knife switch 4, the bottom end of the operating rod 3 is fixedly connected with a cross rod 7, the outer surface of the cross rod 7 and the two sides of the operating rod 3 are both sleeved with positioning sleeves 19, the front surfaces of the positioning sleeves 19 are fixedly connected with the back surface of the high-voltage cabinet door 2, a limiting rod 21 is fixedly connected between the two positioning sleeves 19 and the front side of the operating rod 3, the positioning sleeve 19 is arranged to be capable of installing the positioning cross rod 7, the limiting rod 21 is arranged between the positioning sleeves 19 and can limit the rotating angle of the operating rod 3, so that the L-shaped rotating rod 8 can be accurately aligned to the bayonet 9 of the knife switch 4 and can protect the knife switch 4 to avoid damaging the knife switch 4 due to overlarge force, the rotating sleeve 6 is sleeved on the outer surface of the cross rod 7 and positioned on the left side of the operating rod 3, the spring 14 is movably connected inside the rotating sleeve 6 and positioned on the left side of the prism block 10, the pull rope 15 is fixedly connected on the left side of the inner surface of the rotating sleeve 6, the top end of the pull rope 15 sequentially penetrates through the prism block 10, the cross rod 7, the operating rod 3 and the limiting ring 13 and extends to the upper part of the limiting ring 13, the limiting piece 16 is fixedly connected on the top end of the pull rope 15, the rotating sleeve 6 can be pulled by arranging the pulling sleeve 12 to be matched with the pull rope 15 for use, and the L-shaped rotating sleeve 6 can be adjusted to move rightwards so that the L-shaped rotating rod 8 moves to the bayonet 9 of the knife switch 4, at the moment, the circuit breaker 1 can be operated, after the pulling sleeve 12 is loosened, the elastic force of the spring 14 can be utilized to reset the rotating sleeve 6, the circuit breaker can be disconnected for operation by one hand, the use is convenient, the rear side of the outer surface of the rotating sleeve 6 is fixedly connected with an L-shaped rotating rod 8, the front end of the knife switch 4 is provided with a bayonet 9 matched with the L-shaped rotating rod 8, the bayonet 9 is reserved with enough depth to avoid the L-shaped rotating rod 8 from being clamped when rotating, the left end of the cross rod 7 is fixedly connected with a prism block 10, the inside of the rotating sleeve 6 is provided with a prism-shaped sliding groove 11 in sliding connection with the prism block 10, the cross rod 7 can be driven to rotate together with the L-shaped rotating rod 8 by rotating the operating rod 3, the knife switch 4 can be directly pushed to rotate to realize switching on and off, the rotating sleeve 6 can slide left and right, the rotating rod of the L-shaped rotating sleeve 8 and the knife switch 4 can be realized, the operation can be invalid after being separated, further, equipment faults caused by manual misoperation are avoided, the operating rod 3 does not need to be detached and can be stored on the high-voltage cabinet door 2 all the time, the problem of loss of the operating rod 3 is avoided, and the use is convenient.

And those not described in detail in this specification are well within the skill of those in the art.

step one, opening a brake: after the door 2 of the high-voltage cabinet is closed, if the breaker is to be disconnected, the rotating cover 5 can be opened, the operating rod 3 is pulled out to incline, the operating rod 3 is kept in contact with the limiting rod 21 and cannot be pulled continuously, the horizontal section of the L-shaped rotating rod 8 is flush with the bayonet 9 of the knife switch 4, then the pulling sleeve 12 is pushed upwards, the pulling rope 15 is pulled by the pulling sleeve 12, the rotating sleeve 6 is indirectly pulled rightwards, the L-shaped rotating rod 8 is inserted into the bayonet 9, the short rod 17 can slide out of the sliding groove 18 at the moment, then the pulling sleeve 12 is rotated to slide to the bottom of the pulling sleeve 12 to support the short rod, then the operating rod 3 can be pushed back into the storage groove 20, the cross rod 7, the rotating sleeve 6 and the L-shaped rotating rod 8 can be driven to rotate together, the knife switch 4 is pressed down to realize opening, and finally the pulling sleeve 12 is pushed horizontally to rotate until the short rod 17 can be rotated, the compressed spring 14 rebounds to reset the rotating sleeve 6, the L-shaped rotating rod 8 and the pulling sleeve 12, and then the rotating cover 5 is covered;

step two, closing a switch: upwards promote pulling cover 12 earlier, utilize pulling cover 12 pulling stay cord 15, indirectly will rotate cover 6 and stimulate right, make L type dwang 8 inject in bayonet socket 9, quarter butt 17 can roll-off spout 18 this moment, then rotate pulling cover 12, make and slide to pulling cover 12 bottom and live it, pull out operating rod 3 forward again, make L type dwang 8 upwards promote knife switch 4, make circuit breaker 1 combined floodgate alright, then rotate pulling cover 12, until will rotate to quarter butt 17 position alright, the spring 14 of compressed this moment kick-backs, make and rotate cover 6, L type dwang 8 and pulling cover 12 reset, push back operating rod 3 again and deposit in the recess 20, cover at last and rotate lid 5 alright.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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.

Claims

1. The utility model provides a high-voltage board circuit breaker divide closing operation pole device, includes circuit breaker (1), high-voltage board chamber door (2) and action bars (3), the rear side that high-voltage board chamber door (2) and extend to high-voltage board chamber door (2) is run through to the bottom of action bars (3), its characterized in that: the front of circuit breaker (1) is rotated and is connected with plug-in strip switch (4), the bottom fixedly connected with horizontal pole (7) of action bars (3), the surface of horizontal pole (7) and the left side cover that is located action bars (3) are equipped with and rotate cover (6), the rear side fixedly connected with L type dwang (8) of rotating cover (6) surface, and the front end of plug-in strip switch (4) offer bayonet socket (9) with L type dwang (8) looks adaptation, the left end fixedly connected with prism piece (10) of horizontal pole (7), and rotate the inside of cover (6) and offer prism type spout (11) with prism piece (10) sliding connection.

2. The switch-on/off operating lever device of the high-voltage cabinet circuit breaker according to claim 1, wherein: the top cover of action bars (3) surface is equipped with pulling cover (12), the internal surface of pulling cover (12) just is located the top fixedly connected with spacing ring (13) of action bars (3).

3. The switch-on/off operating lever device of the high-voltage cabinet circuit breaker according to claim 1, wherein: the inner part of the rotating sleeve (6) is movably connected with a spring (14) on the left side of the prism block (10), and a pull rope (15) is fixedly connected on the left side of the inner surface of the rotating sleeve (6).

4. The switch-on/switch-off operating rod device of the high-voltage cabinet circuit breaker according to claim 3, characterized in that: the top end of the pull rope (15) penetrates through the prism block (10), the cross rod (7), the operating rod (3) and the limiting ring (13) in sequence and extends to the upper part of the limiting ring (13), and the top end of the pull rope (15) is fixedly connected with a limiting piece (16).

5. The switch-on/off operating lever device of the high-voltage cabinet circuit breaker according to claim 1, wherein: the top end of the surface of the operating rod (3) is fixedly connected with a short rod (17), and the side surface of the pulling sleeve (12) is provided with a sliding groove (18) which is connected with the short rod (17) in a sliding manner.

6. The switch-on/off operating lever device of the high-voltage cabinet circuit breaker according to claim 1, wherein: the surface of horizontal pole (7) and the both sides that are located action bars (3) all overlap and are equipped with position sleeve (19), and the front of position sleeve (19) and the back fixed connection of high-voltage board chamber door (2), two just be located front side fixedly connected with gag lever post (21) of action bars (3) between position sleeve (19).

7. The switch-on/off operating lever device for a high-voltage cabinet circuit breaker according to claim 1, wherein: the utility model discloses a high-voltage board chamber door, including the front of high-voltage board chamber door (2) and the outside that is located action bars (3) has been seted up and has been deposited recess (20), deposit the equal fixedly connected with elasticity fixture block (22) in both sides of the internal surface of recess (20) and be located action bars (3), the right side of depositing recess (20) internal surface is rotated and is connected with and is rotated lid (5).

8. The switch-on/off operating lever device of the high-voltage cabinet circuit breaker according to any one of claims 1 to 7, wherein: the installation method specifically comprises the following steps:

step one, opening a brake: after the door (2) of the high-voltage cabinet is closed, if the breaker is to be disconnected, the rotating cover (5) can be opened, the operating rod (3) is pulled out to incline, the operating rod (3) is kept to be in contact with the limiting rod (21) and cannot be pulled continuously, the horizontal section of the L-shaped rotating rod (8) is flush with the bayonet (9) of the knife switch (4), then the pulling sleeve (12) is pushed upwards, the pulling rope (15) is pulled by the pulling sleeve (12), the rotating sleeve (6) is indirectly pulled rightwards, the L-shaped rotating rod (8) is inserted into the bayonet (9), the short rod (17) can slide out of the sliding groove (18), then the pulling sleeve (12) is rotated to slide to the bottom of the pulling sleeve (12) to support the rotating sleeve, then the operating rod (3) can be pushed back into the storage groove (20), and the rotating rod (7), the rotating sleeve (6) and the L-shaped rotating rod (8) can be driven to rotate together, the knife switch (4) is pressed down to realize brake opening, the pulling sleeve (12) is horizontally pushed to rotate until the knife switch is rotated to the position of the short rod (17), the compressed spring (14) rebounds, the rotating sleeve (6), the L-shaped rotating rod (8) and the pulling sleeve (12) are reset, and then the rotating cover (5) is covered;

step two, closing a switch: firstly upwards pushes the pulling sleeve (12), utilizes the pulling sleeve (12) to pull the pull rope (15), indirectly pulls the rotating sleeve (6) rightwards, so that the L-shaped rotating rod (8) is inserted into the bayonet (9), at the moment, the short rod (17) can slide out of the sliding groove (18), then the pulling sleeve (12) is rotated, the bottom of the sliding sleeve (12) is slid to support the rotating sleeve, then the operating rod (3) is pulled out forwards, the L-shaped rotating rod (8) upwards pushes the knife switch (4), the circuit breaker (1) can be switched on, then the pulling sleeve (12) is rotated until the short rod (17) is rotated, at the moment, the compressed spring (14) rebounds, the rotating sleeve (6), the L-shaped rotating rod (8) and the pulling sleeve (12) are reset, the operating rod (3) is pushed back into the storage groove (20), and finally the rotating cover (5) is covered.