CN110875162A - Mechanical quick switch based on electromagnetic repulsion mechanism - Google Patents

Abstract

The invention discloses a mechanical quick switch based on an electromagnetic repulsion mechanism, which belongs to the technical field of switch cabinets. The invention includes a connecting rod, a bistable holding mechanism, an operating mechanism and a set of electromagnetic repulsion mechanisms; the connecting rod moves under the driving of the electromagnetic repulsion mechanism or the operating mechanism to make the mechanical quick switch open; the The connecting rod moves under the driving of the operating mechanism to close the mechanical quick switch; when the connecting rod opens or closes, the bistable holding mechanism exerts a holding force on the open and closed state of the connecting rod ; During the rapid opening process, the electromagnetic repulsion mechanism and the operating mechanism are completely independent; and both the electromagnetic repulsion mechanism and the operating mechanism can realize the opening operation. The invention can realize the miniaturization and intensification of the circuit breaker; solve the rigid collision problem between the electromagnetic repulsion mechanism and the closing holding mechanism; and can realize different opening operation modes under normal working conditions and fault working conditions.

Description

Mechanical quick switch based on electromagnetic repulsion mechanism

technical field

The invention belongs to the technical field of switch cabinets, in particular to a mechanical quick switch based on an electromagnetic repulsion mechanism.

Background technique

In recent years, with the large-scale access of distributed power sources and energy storage devices, the rapid development of power electronics technology, and the growth of DC loads, DC power distribution has attracted more and more attention. Especially in some specific occasions, such as large ship power supply system, urban rail transit power supply system and other DC systems have been developed by leaps and bounds. With the continuous increase of the capacity of the DC system and the continuous improvement of the voltage level, the indicators of the short-circuit current peak value and the breaking time of the DC circuit breaker are also constantly improving. Although the traditional mechanical switch has the advantages of strong load capacity and stable conduction, the response speed is slow, generally around 5-20ms, which cannot meet some requirements for fast action; the power electronic switch has a fast response speed, but its on-state loss is too large , the pressure resistance is low.

Because the hybrid DC circuit breaker composed of fast mechanical switches and high-power semiconductor devices has the advantages of large current capacity, fast turn-off speed, and strong current limiting ability, it has great potential in the field of DC interruption. The hybrid DC circuit breaker requires that the fast mechanical switch can realize the high-speed separation of the contacts, which is convenient for the transfer of current to the transfer branch. At the same time, the fast mechanical switch is required to obtain the maximum initial speed as soon as possible to form an insulation gap as soon as possible to resist the subsequent mechanical circuit breaker fractures. a high transient recovery voltage. At this stage, most of the fast mechanical switches use double electromagnetic repulsion mechanisms, which require two repulsion coils and two sets of driving circuits. The mechanisms and driving circuits are large in size and high in cost, which is not conducive to the miniaturization and intensification of circuit breakers. Therefore, the electromagnetic repulsion fast mechanical switches at this stage are mostly in the stage of theoretical research and principle prototype, and there is no reliable engineering application case, which seriously affects the development and use of hybrid DC circuit breakers.

For example, the Chinese patent application number CN201620362749.5 discloses a quick switch based on a permanent magnet holding mechanism, including a repulsion mechanism and a permanent magnet mechanism, including an upper guide rod, a vacuum interrupter, a middle guide rod, an insulator, The special feature of the lower guide rod and the moving iron core for holding is: a repulsion disk is sleeved on the lower guide rod, an opening coil is installed above the repulsion disk and a closing coil is installed below it; A static iron core for upper holding is installed above the moving iron core for holding, a permanent magnet for closing is installed in the middle of the static iron core for holding, and a static iron core for lower holding is installed under the moving iron core for holding , and a permanent magnet for opening and maintaining is installed in the middle of the lower holding static iron core. The lower end of the closing permanent magnet is shorter than the lower end of the static iron core for the upper holding, so that a groove is formed at the lower end of the static iron core for the upper holding as the upper air gap; the upper end of the permanent magnet for the opening is shorter than the upper end of the static iron core for the lower holding , so that a groove is formed at the upper end of the lower holding static iron core as a lower air gap. The permanent magnet holding part is used to provide the opening holding force and closing holding force for the arc extinguishing chamber contacts in the circuit breaker, so that the circuit breaker is in a stable opening state or closing state; the electromagnetic repulsion operating part is in the opening and closing state. During operation, electromagnetic force is provided to make the circuit breaker change from opening to closing, or from closing to opening.

However, the above-mentioned quick switch uses a double electromagnetic repulsion mechanism, which requires two repulsion coils and two sets of driving circuits. The mechanism and driving circuit are bulky and expensive, which is not conducive to miniaturization and intensification of the circuit breaker.

The Chinese patent application with the application number of 201710859374.2 discloses an operating device for a DC circuit breaker, which includes a vacuum bubble, a repulsion mechanism, and an electromagnetic mechanism connected to the repulsion mechanism via a connecting rod. A mechanical contact composed of a head and a moving contact, the moving contact is connected to a repulsion mechanism via an insulating pull rod, and the repulsion mechanism includes an opening coil, a repulsion disc, a charge and discharge circuit, and a control device that controls the charge and discharge circuit to trigger the opening operation. The first controller, the repulsion disc is connected to the connecting rod through the moving guide rod, the opening coil is located above the repulsion disc and the gap is not greater than 3.5mm; the electromagnetic mechanism includes a ring-shaped hollow static iron core, a moving iron core, a suction coil , Holding coil, opening reset spring, contact spring and second controller.

However, the above-mentioned operating device adopts a single electromagnetic repulsion mechanism to achieve rapid opening, uses an electromagnet as the closing holding mechanism, adopts the electromagnet coil to de-energize and reversely charge, and cooperates with the opening spring to achieve rated opening. Because the electromagnetic repulsion mechanism can quickly reach the thrust peak value in tens to hundreds of microseconds, which is much faster than the action time of the electromagnet, when the electromagnetic repulsion mechanism is quickly opened, the repulsion disk drives the connecting rod to move downward. The electromagnet still provides the closing retention force, and the opening spring will generate a reverse force due to compression, which will reduce the opening speed of the fast mechanical switch, increase the opening time, and cause the electromagnetic repulsion mechanism and the closing retention mechanism. Rigid collision, causing bouncing phenomenon.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a mechanical quick switch based on the electromagnetic repulsion mechanism, which not only has high reliability, simple structure, small volume and fast opening speed, but also can solve the rigid collision problem between the electromagnetic repulsion mechanism and the closing holding mechanism.

Specifically, the present invention is realized by adopting the following technical solutions: including a connecting rod, a bistable holding mechanism, an operating mechanism and a set of electromagnetic repulsion mechanisms; the connecting rod moves under the driving of the electromagnetic repulsion mechanism or the operating mechanism , make the mechanical quick switch open; the connecting rod moves under the drive of the operating mechanism to close the mechanical quick switch; when the connecting rod opens or closes, the bistable keeps The mechanism exerts a holding force on the opening and closing state of the connecting rod.

Further, the electromagnetic repulsion mechanism includes a repulsion coil and a repulsion disc, the repulsion disc is fixed on the connecting rod, and the repulsion coil exerts a repulsion force on the repulsion disc to drive the mechanical quick switch to move to the opening position.

Further, the bistable holding mechanism includes a bistable spring and a connecting rod, one end of the bistable spring is fixed, the other end is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the connection When the connecting rod moves to the opening position or the closing position, the bistable spring maintains a compressed state, and the connecting rod exerts a holding force in the opening or closing state through the connecting rod.

Further, the bistable holding mechanism includes a bistable disc spring, the outer end of the bistable disc spring is fixed, and the inner end is fixedly connected with the connecting rod; the connecting rod moves to the opening position or the closing position. When the bistable disc spring is kept in a compressed state, the bistable disc spring exerts the holding force of the open or closed state on the connecting rod through the bistable disc spring.

Further, the connecting rod and the operating mechanism are connected through an interlocking mechanism, and a clamping arm is installed in the interlocking mechanism; When the mechanical quick switch completes opening, it pops out from the interlocking mechanism; when closing, the operating mechanism abuts the clamping arm and pushes the connecting rod to move to the closing position.

Further, the operating mechanism is a bistable permanent magnet mechanism, which is used to drive the connecting rod to move to realize closing and opening of the mechanical quick switch under normal working conditions. The electromagnetic repulsion mechanism opens the mechanical quick switch.

Further, the operating mechanism is a monostable permanent magnet mechanism or an electromagnetic mechanism, which is used to drive the connecting rod to move to close the mechanical quick switch. The electromagnetic repulsion mechanism opens the mechanical quick switch.

Further, a locking hole is opened in the interlocking mechanism, and a locking rod is installed on the operating mechanism; the locking rod passes through the locking hole; the size of the locking hole along the moving direction of the connecting rod is not smaller than all the the maximum travel of the connecting rod.

Further, a buffer device is installed below the electromagnetic repulsion mechanism and/or the operating mechanism.

Further, the buffer device is an oil buffer, a gas buffer, a damping buffer or a spring buffer.

The beneficial effects of the present invention are as follows: the mechanical quick switch based on the electromagnetic repulsion mechanism of the present invention, on the one hand, the present invention only adopts a set of electromagnetic repulsion mechanisms, which can effectively reduce the number of repulsion coils and driving loops and reduce the volume compared with the double electromagnetic repulsion mechanism. , save costs, realize the miniaturization and intensification of the circuit breaker, and solve the problems of large volume and high cost of the fast mechanical switch mechanism and drive circuit; The magnetic mechanism is completely independent, and the permanent magnet mechanism will not affect the opening speed of the electromagnetic repulsion mechanism, avoid bouncing caused by rigid collision, improve the opening speed of the fast mechanical switch, and solve the rigid collision problem between the electromagnetic repulsion mechanism and the operating mechanism; On the one hand, both the electromagnetic repulsion mechanism and the permanent magnet mechanism of the present invention can realize the opening operation, and two sets of completely independent opening mechanisms are provided. The normal opening is realized by the permanent magnet mechanism, which reduces the number of actions of the permanent magnet mechanism and greatly improves the reliability and working life of the fast mechanical switch.

Description of drawings

FIG. 1 is a schematic structural diagram of the state of the opening of the gate according to Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of an intermediate state in a closing process according to Embodiment 1 of the present invention.

FIG. 3 is a schematic structural diagram of a closing completion state according to Embodiment 1 of the present invention.

4 is a schematic structural diagram of an intermediate state in a normal opening process according to Embodiment 1 of the present invention.

FIG. 5 is a schematic structural diagram of an intermediate state in an emergency opening process according to Embodiment 1 of the present invention.

FIG. 6 is a schematic structural diagram of a state in which the opening is completed according to Embodiment 2 of the present invention.

7 is a schematic structural diagram of an intermediate state in a closing process according to Embodiment 2 of the present invention.

FIG. 8 is a schematic structural diagram of a closing completion state according to Embodiment 2 of the present invention.

FIG. 9 is a schematic structural diagram of an intermediate state in an opening process according to Embodiment 2 of the present invention.

Labels in the figure: 1-vacuum interrupter, 2-insulation rod, 3-connecting rod, 4-repulsion coil, 5-repulsion disc, 6-connecting rod, 7-bistable spring, 8-buffer device, 9 -Clamping arm, 10-interlocking mechanism, 11-locking hole, 12-locking lever, 13-bistable permanent magnet mechanism, 14-bistable disc spring, 15-monostable permanent magnet mechanism.

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

Example 1:

An embodiment of the present invention is a mechanical quick switch based on an electromagnetic repulsion mechanism. See Figure 1 for the structure of the mechanical quick switch based on the electromagnetic repulsion mechanism.

The vacuum interrupter 1 is connected with the connecting rod 3 through the insulating pull rod 2 . An electromagnetic repulsion mechanism and a bistable holding mechanism are installed on the connecting rod 3; The bistable holding mechanism includes a bistable spring 7 and a connecting rod 6. One end of the connecting rod 6 is connected to the bistable spring 7, and the other end is connected to the connecting rod 3; when the connecting rod 3 moves upwards or downwards, the bistable spring 7 remains compressed. The state of the connecting rod 3 is maintained by the link 6 . In this embodiment, only a bistable spring is used for illustration, but it is not limited to a bistable spring, and can also be other types of bistable holding mechanisms, such as a bistable disc spring. The used bistable holding mechanism only needs to be It is enough to realize the above functions. The operating mechanism adopts a bistable permanent magnet mechanism 13, which can realize closing and opening operations. The connecting rod 3 is connected with the bistable permanent magnet mechanism 13 through an interlocking mechanism 10, and the interlocking mechanism 10 is fixed on the lower end of the connecting rod 3; the interlocking mechanism 10 is provided with a card arm 9 that can be ejected and retracted. A locking hole 11 is opened in the interlocking mechanism 10 , a locking rod 12 is installed above the bistable permanent magnet mechanism 13 , the locking rod 12 can move up and down in the locking hole 11 , and the diameter of the locking hole 11 is not less than the maximum stroke of the connecting rod 12 That is, the maximum stroke of the connecting rod 3 when opening; a buffer device 8 is installed under the repulsion disk 5 and the bistable permanent magnet mechanism 13 to play a buffering role during the opening process. The buffer 8 can use an oil buffer, a gas buffer, a damping buffer or a spring buffer to achieve buffering.

Under normal working conditions, the mechanical quick switch adopts the bistable permanent magnet mechanism 13 to realize the closing operation and the opening operation of the mechanical quick switch, and the bistable holding mechanism is used to maintain the opening and closing states of the mechanical quick switch. Under fault conditions, the mechanical quick switch adopts an electromagnetic repulsion mechanism to realize the quick opening operation of the mechanical quick switch.

The specific opening and closing operations are as follows:

1. Closing operation under normal conditions

Referring to FIG. 1 , the initial position of the vacuum interrupter 1 is in a state of completion of opening, and the clamping arm 9 in the interlock mechanism 10 is in a state of ejection. Referring to FIG. 2, the bistable permanent magnet mechanism 13 is closed, and the bistable permanent magnet mechanism 13 pushes the ejected clamping arm 9 to move upward, which drives the interlocking mechanism 10, the connecting rod 3, and the insulating pull rod 2 to move upward, so that the vacuum is extinguished. Arc chamber 1 is closed. The connecting rod 3 drives the bistable holding mechanism to move upward. Since the bistable spring 7 is kept in a compressed state, a force along the connecting rod 6 is continuously generated on the connecting rod 6, thereby exerting a force on the connecting rod 3 towards the closing position. , that is, the bistable holding mechanism is in the closing holding position, providing the closing state holding force of the vacuum interrupter 1 . Referring to FIG. 3 , after the vacuum interrupter 1 is in the closing position, the clamping arm 9 is retracted into the interlocking mechanism 10 .

2. Opening operation under normal working conditions

Referring to FIG. 3 , the initial position of the vacuum interrupter 1 is in the closing position, and the clamping arm 9 in the interlock mechanism 10 is in the retracted state. Referring to FIG. 4 , the bistable permanent magnet mechanism 13 opens the gate, and the bistable permanent magnet mechanism 13 moves downward to overcome the closing force provided by the bistable holding mechanism, and the lock above the bistable permanent magnet mechanism 13 The rod 12 drives the interlocking mechanism 10 , the connecting rod 3 and the insulating pull rod 2 to move to the opening position, so that the vacuum interrupter 1 is opened. The connecting rod 3 drives the bistable holding mechanism to move to the opening position. Since the bistable spring 7 remains in a compressed state, a force along the connecting rod 6 is continuously generated on the connecting rod 6, thereby exerting a force on the connecting rod 3 toward the opening position. The force of , that is, the bistable holding mechanism is in the opening holding position, providing the holding force of the vacuum interrupter 1 in the opening state. The buffer device 8 installed at the repulsion disc 5 and the bistable permanent magnet mechanism 13 plays a buffer role in the opening process. Referring to FIG. 1 , after the vacuum interrupter 1 is in the opening position, the clamping arm 9 is ejected from the interlocking mechanism 10 .

3. Emergency opening under fault conditions

Referring to FIG. 3 , the initial position of the vacuum interrupter 1 is in a closed state, and the clamping arm 9 in the interlock mechanism 10 is in a retracted state. Referring to Figure 5, after the short-circuit fault occurs, the repulsion coil 4 discharges, the repulsion disc 5 starts to open, and the generated repulsion overcomes the closed state retention force provided by the bistable holding mechanism 7, and drives the interlocking mechanism 10, connecting rod 3, The insulating rod 2 moves to the opening position. At this time, the clamping arm 9 in the interlocking mechanism 10 is in a retracted state, and the clamping arm 9 is not in contact with the bistable permanent magnet mechanism 13 . The interlocking mechanism 10 starts the fault opening without making contact with the bistable permanent magnet mechanism 13, which can shorten the fault opening time. The connecting rod 3 drives the bistable holding mechanism to move to the opening position. Since the bistable spring 7 remains in a compressed state, a force along the connecting rod 6 is continuously generated on the connecting rod 6, thereby exerting a force on the connecting rod 3 toward the opening position. The force of , that is, the bistable holding mechanism is in the opening holding position, providing the holding force of the vacuum interrupter 1 in the opening state. Referring to FIG. 1, after the electromagnetic repulsion mechanism completes the opening action, the bistable permanent magnet mechanism 13 moves to the opening position. After reaching the opening position, the clamping arm 9 in the interlocking mechanism 10 pops out for the next closing cycle. .

Example 2:

Another embodiment of the present invention is a mechanical quick switch based on an electromagnetic repulsion mechanism. See Figure 6 for the structure of the mechanical quick switch based on the electromagnetic repulsion mechanism. The operating mechanism adopts a monostable permanent magnet mechanism 15 . In this embodiment, only a monostable permanent magnet mechanism is used as an example for illustration, but it is not limited to a monostable permanent magnet mechanism, but can also be other types of monostable operating mechanisms. The steady-state closing function is sufficient.

Under normal working conditions, the mechanical quick switch adopts the monostable permanent magnet mechanism 15 to realize the closing operation of the mechanical quick switch, the electromagnetic repulsion mechanism is used to realize the normal opening operation of the mechanical quick switch, and the bistable holding mechanism is used to maintain the mechanical quick switch. The switch is open and closed. The bistable holding mechanism includes a bistable disc spring 14 fixedly connected with the connecting rod 3 ; the bistable disc spring 14 maintains a compressed state when the connecting rod 3 moves upward or downward, and exerts a holding force on the state of the connecting rod 3 . During the normal opening operation, the discharge voltage at both ends of the repulsion coil 4 of the electromagnetic repulsion mechanism can be reduced, so as to reduce the opening speed of the electromagnetic repulsion mechanism under normal working conditions and improve the reliability and working life of the fast mechanical switch. Under fault conditions, the mechanical quick switch adopts an electromagnetic repulsion mechanism to realize the quick opening operation of the mechanical quick switch.

The specific opening and closing operations are as follows:

1. Closing operation under normal conditions

Referring to FIG. 6 , the initial position of the vacuum interrupter 1 is in a state of completion of opening, and the clamping arm 9 in the interlock mechanism 10 is in a state of ejection. Referring to FIG. 7 , the monostable permanent magnet mechanism 15 closes, and the monostable permanent magnet mechanism 15 pushes the ejected clamping arm 9 to move upward, which drives the interlocking mechanism 10, the connecting rod 3, and the insulating pull rod 2 to move upward, so that the vacuum is extinguished. Arc chamber 1 is closed. The connecting rod 3 drives the bistable holding mechanism to move upward. Since the bistable disc spring 14 is in a compressed state, a force towards the closing position is continuously applied to the connecting rod 3, that is, the bistable holding mechanism is in the closing holding position. Provides the holding force of the closed state of the vacuum interrupter 1. Referring to FIG. 8 , after the vacuum interrupter 1 is in the closing position, the clamping arm 9 is retracted into the interlocking mechanism 10 .

2. Opening operation under normal working conditions:

Referring to FIG. 8 , the initial position of the vacuum interrupter 1 is in a closed state, and the clamping arm 9 in the interlock mechanism 10 is in a retracted state. Referring to Fig. 9, the repulsion coil 4 discharges, the repulsion disc 5 starts to open, and the generated repulsion overcomes the closed state holding force provided by the bistable holding mechanism, and drives the interlocking mechanism 10, the connecting rod 3, and the insulating rod 2 to open the gate. position movement. At this time, since the clamping arm 9 in the interlocking mechanism 10 is in a retracted state, the clamping arm 9 is not in contact with the monostable permanent magnet mechanism 15 . The interlock mechanism 10 starts to open normally without making contact with the monostable permanent magnet mechanism 15 . The connecting rod 3 drives the bistable holding mechanism to move to the opening position. Since the bistable disc spring 14 is in a compressed state, the connecting rod 3 continues to exert a force toward the opening position, that is, the bistable holding mechanism is in the opening position. The holding position provides the holding force of the vacuum interrupter 1 in the open state. Referring to FIG. 6 , after the electromagnetic repulsion mechanism completes the opening action, the monostable permanent magnet mechanism 15 moves to the opening position. After reaching the opening position, the clamping arm 9 in the interlocking mechanism 10 pops out for the next closing cycle. .

3. Emergency opening under fault conditions:

Referring to FIG. 8 , the initial position of the vacuum interrupter 1 is in a closed state, and the clamping arm 9 in the interlock mechanism 10 is in a retracted state. Referring to Fig. 9, the repulsion coil 4 discharges, the repulsion disc 5 starts to open, and the generated repulsion overcomes the closed state holding force provided by the bistable holding mechanism, and drives the interlocking mechanism 10, the connecting rod 3, and the insulating rod 2 to open the gate. position movement. At this time, since the clamping arm 9 in the interlocking mechanism 10 is in a retracted state, the clamping arm 9 is not in contact with the monostable permanent magnet mechanism 15 . The interlock mechanism 10 begins to open rapidly without making contact with the monostable permanent magnet mechanism 15 . The connecting rod 3 drives the bistable holding mechanism to move to the opening position. Since the bistable disc spring 14 is in a compressed state, the connecting rod 3 continues to exert a force toward the opening position, that is, the bistable holding mechanism is in the opening position. The holding position provides the holding force of the vacuum interrupter 1 in the open state. Referring to FIG. 6 , after the electromagnetic repulsion mechanism completes the opening action, the monostable permanent magnet mechanism 15 moves to the opening position. After reaching the opening position, the clamping arm 9 in the interlocking mechanism 10 pops out for the next closing cycle. .

Although the present invention has been disclosed above with preferred embodiments, the embodiments are not intended to limit the present invention. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the content defined by the claims of the present application.

Claims (10)

1. a mechanical quick switch based on electromagnetic repulsion mechanism, is characterized in that, comprises connecting rod, bistable holding mechanism, operating mechanism and a group of electromagnetic repulsion mechanism; Described connecting rod is in described electromagnetic repulsion mechanism or operating mechanism. It moves under the drive to make the mechanical quick switch open; the connecting rod moves under the drive of the operating mechanism to close the mechanical quick switch; when the connecting rod opens or closes, the double The steady state maintaining mechanism exerts a maintaining force on the opening and closing state of the connecting rod. 2. The mechanical quick switch based on an electromagnetic repulsion mechanism as claimed in claim 1, wherein the electromagnetic repulsion mechanism comprises a repulsion coil and a repulsion disk, the repulsion disk is fixed on the connecting rod, and the repulsion disk is connected to the repulsion disk through the repulsion coil. Apply repulsive force to drive the mechanical quick switch to move to the opening position. 3. The mechanical quick switch based on an electromagnetic repulsion mechanism according to claim 1, wherein the bistable holding mechanism comprises a bistable spring and a connecting rod, one end of the bistable spring is fixed, and the other end is fixed. It is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the connecting rod; when the connecting rod moves to the opening position or the closing position, the bistable spring is kept in a compressed state, and the connecting rod is connected to the connecting rod through the connecting rod. Apply a holding force for the open or closed state. 4. The mechanical quick switch based on an electromagnetic repulsion mechanism according to claim 1, wherein the bistable holding mechanism comprises a bistable disc spring, the outer end of the bistable disc spring is fixed, and the inner end is fixed. It is fixedly connected with the connecting rod; when the connecting rod moves to the opening position or the closing position, the bistable disc spring is kept in a compressed state, and the bistable disc spring applies the holding force of the opening or closing state to the connecting rod. . 5 . The mechanical quick switch based on an electromagnetic repulsion mechanism according to claim 1 , wherein the connecting rod and the operating mechanism are connected through an interlocking mechanism, and a clamping arm is installed in the interlocking mechanism; When the mechanical quick switch completes closing, the interlocking mechanism is retracted, and when the mechanical quick switch completes opening, it is ejected from the interlocking mechanism; when closing, the operating mechanism is in contact with the clamping arm, and pushes the connecting rod toward the closing. brake position movement. 6 . The mechanical quick switch based on an electromagnetic repulsion mechanism according to claim 5 , wherein the operating mechanism is a bistable permanent magnet mechanism for driving the connecting rod to move to realize the The closing and opening of the mechanical quick switch, in the case of a fault condition, the mechanical quick switch is opened by the electromagnetic repulsion mechanism. 7 . The mechanical quick switch based on an electromagnetic repulsion mechanism according to claim 5 , wherein the operating mechanism is a monostable permanent magnet mechanism or an electromagnetic mechanism for driving the connecting rod to move to make the mechanical quick switch 7 . The switch is closed, and the mechanical quick switch is opened through the electromagnetic repulsion mechanism in both normal and fault conditions. 8 . The mechanical quick switch based on an electromagnetic repulsion mechanism according to claim 6 , wherein a locking hole is opened in the interlocking mechanism, and a locking lever is installed on the operating mechanism; the locking lever extends from the locking hole. 9 . The size of the locking hole along the moving direction of the connecting rod is not less than the maximum stroke of the connecting rod. 9 . The mechanical quick switch based on an electromagnetic repulsion mechanism according to claim 1 , wherein a buffer device is installed under the electromagnetic repulsion mechanism and/or the operating mechanism. 10 . 10 . The mechanical quick switch based on an electromagnetic repulsion mechanism according to claim 9 , wherein the buffer device is an oil buffer, a gas buffer, a damping buffer or a spring buffer. 11 .

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