Novel rapid isolation switch type electric braking device

Abstract

The utility model discloses a novel rapid disconnecting switch type electric braking device, which comprises an isolated-phase enclosed busbar cylinder, a main loop conductor, a static contact, a movable guide rod, a short-circuit copper bar, a transmission mechanism, an operating mechanism, a control box and the like, and is characterized in that the electric braking device is in three-phase linkage control, and is in three-phase short circuit at the tail end of the device to form braking short-circuit current; contact of a moving contact and a static contact of a main loop of the device is designed in a sliding connection mode, the transmission mechanism integrally adopts a swing rod mode to drive a moving guide rod to ascend or descend, and the operating mechanism is composed of a three-phase asynchronous motor, a gear reducer, an energy storage assembly, a crank arm assembly and other elements. And the transmission mechanism is driven by the external swing arm and the connecting rod to perform quick opening and closing actions.

Description

Technical Field

[0001] This utility model relates to a complete set of power switchgear for generators in large-scale hydropower stations or pumped storage power stations with medium voltage systems, belonging to the field of power equipment design and manufacturing, and particularly to a new type of fast disconnecting switch-type electrical braking device. Background Technology

[0002] Currently, the complete sets of switchgear for generators in large-scale hydropower stations or pumped storage power stations in China mainly rely on imports, with electrical braking devices being one such set of equipment. However, in the near future, the construction of pumped storage power stations will develop rapidly, and the localization research and development of electrical braking devices will begin.

[0003] The working principle of the electric braking device is based on the armature reaction of a synchronous motor. When the unit is disconnected from the grid and the generator rotor is demagnetized, the speed drops to a certain range (generally 50% to 60% of the rated speed). The electric braking device is then engaged, short-circuiting the three phases of the stator and simultaneously applying excitation current to the generator. This generates an electromagnetic torque in the opposite direction to the unit's inertial torque, thus achieving electric braking and rapid shutdown. The electric braking device features high current carrying capacity for a short time (lasting approximately 3-5 minutes), low temperature rise, and the ability to close large currents. Since pumped-storage hydroelectric units operate in both power generation and pumping modes, engaging the electric braking device is necessary to quickly stop the unit for this mode transition, thereby improving operational efficiency.

[0004] The existing technical route for complete sets of electric braking devices is mostly based on SF6 circuit breakers. Although this solution can meet the requirement of rapid shutdown of generator sets, for the shutdown of larger units, the short-time rated current of the device can reach about 10,000A, which results in huge manufacturing costs, large size and footprint, and low economic practicality.

[0005] Based on the operating conditions of the electric braking device, it is known that the device only executes the tripping command when the generator speed drops to about 5% of its rated speed. At this time, the device's terminal voltage is very low, and the circuit current is also very small, making the tripping condition relatively ideal. Therefore, this device does not have the functional requirement of interrupting large fault currents or rated currents. However, under the closing condition, the electric braking device is only engaged when the generator speed drops to about half of its rated speed, resulting in a certain terminal voltage and circuit current. Therefore, the device must meet the requirement of closing the expected current. The key factors determining the success or failure of closing the expected current are mainly the device's closing speed and arc-extinguishing system. The design points and difficulties of the new fast disconnecting switch type electric braking device also lie in this. As long as a certain closing speed and arc-initiating measures are ensured during closing to prevent severe burning of the moving and stationary contacts, the device will close successfully, and the contacts can be used for a long time without replacement, thus fundamentally solving the problems of high maintenance frequency and high maintenance costs. Utility Model Content

[0006] The main objective of this invention is to provide a novel fast-isolating switch-type electric braking device, which aims to solve existing technical problems.

[0007] To achieve the above objectives, this utility model provides a novel fast disconnect switch-type electrical braking device, including a phase-separated enclosed busbar cylinder, a main circuit conductor, an arc-inducing contact, and a stationary contact. The phase-separated enclosed busbar cylinder contains the main circuit conductor, and a stationary contact support is welded to the lower end of the main circuit conductor to fix the stationary contact. The arc-inducing contact is mounted on the stationary contact seat.

[0008] It also includes a moving contact, a watch strap contact finger, a moving guide rod outer cylinder, a moving guide rod, a shorting copper busbar, an insulating rod, an outer insulating cylinder, an operating mechanism, a control box, and a transmission assembly. The moving contact is installed on the top of the moving guide rod. The moving guide rod has an internal rib plate that connects and fixes a transmission optical shaft. The outer part is the moving guide rod outer cylinder. Three high-current watch strap contact fingers are installed at the upper end of the moving guide rod outer cylinder. The shorting copper busbar is installed between the moving guide rod outer cylinder and the outer insulating cylinder of the three phases of the equipment. The insulating rod is placed inside the outer insulating cylinder, and its upper and lower ends are connected to the transmission optical shaft and the transmission assembly, respectively. The outer swing arm on the operating mechanism is connected to the transmission assembly.

[0009] Furthermore, the main circuit conductor is the current-carrying carrier of the main circuit, and its shape is cylindrical with regular octagonal interfaces at both ends.

[0010] Furthermore, the watchband's contact fingers are double-swallowtail shaped and elastic, each contact finger has a current carrying capacity of approximately 100A, and there are approximately 52 contact fingers in each row, with the contact points being linear contacts.

[0011] Furthermore, the inner side of the stationary contact is equipped with three high-current meter contact fingers, identical to those inside the outer cylinder of the moving guide rod.

[0012] Furthermore, the transmission optical shaft is made of metal and is connected to the rib plate inside the moving guide rod, passing through the outer cylinder of the moving guide rod and the outer insulating cylinder to connect to the insulating rod.

[0013] Furthermore, the insulating rod is in the form of epoxy casting and has an external umbrella skirt structure.

[0014] Furthermore, the transmission assembly includes a transmission fixed support, a transmission connecting rod, a transmission swing rod, a transmission top rod, a transmission linkage swing rod, and a transmission rotating swing rod. The outer swing arm on the operating mechanism is connected to the transmission connecting rod, and the transmission swing rod is connected to the transmission connecting rod. The transmission swing rod is fixed on the rotating shaft of the base and rotates left and right around the rotating shaft. The transmission linkage swing rod is fixed on the rotating shaft of the base and rotates around the rotating shaft.

[0015] When the circuit breaker is closed, the operating mechanism drives its outer swing arm to rotate to the right, which in turn drives the transmission link and the transmission swing arm to move to the right. When the energy storage component in the operating mechanism moves to the critical point, the spring energy is released rapidly, thus achieving a fast closing action.

[0016] During the closing operation, the transmission swing rod drives the transmission linkage swing rod to rotate clockwise. At the same time as the transmission linkage swing rod rotates clockwise, it drives the transmission rotating swing rod to rotate counterclockwise around the transmission fixed support, and drives the transmission push rod to move upward, thereby realizing the closing action.

[0017] Furthermore, the waist hole at the connecting end of the transmission rocker arm ensures that it maintains a constant distance from the transmission link when making arc motion, thus guaranteeing that the transmission link moves horizontally left and right.

[0018] Furthermore, the waist hole at the connecting end of the transmission fixed support ensures that the distance between the transmission rotating rocker arm and the transmission top rod remains constant during the arc motion. During the rotational motion, the fulcrum of the transmission rotating rocker arm slides within the waist hole, enabling the transmission top rod to move vertically upward.

[0019] Furthermore, the operating mechanism includes a three-phase asynchronous motor, a gear reducer, and a crank arm assembly. The three-phase asynchronous motor and the gear reducer provide a power source to drive the crank arm assembly to rotate. A rotating arm associated with the spring energy storage assembly is mounted on the crank arm assembly.

[0020] The beneficial effects of this utility model are reflected in:

[0021] Compared with the traditional SF circuit breaker-type electrical braking device, the electrical braking complete set based on the fast disconnect switch has significant advantages in terms of structural simplicity, equipment cost and electrical control. It not only has good three-phase linkage mechanical characteristics and fast closing characteristics, but also has specially designed electrical arc-inducing contacts, resulting in superior electrical performance and extended electrical life.

[0022] Since the electric braking device is installed on the generator output side, it is in the open state when the generator main circuit is normally energized. If an electrical mis-closing or insulation breakdown occurs, it will cause a two-phase or three-phase short circuit at the generator output. Therefore, the fast-disconnecting switch type electric braking device has a significantly larger isolation gap in the open position. Compared with the SF6 circuit breaker type electric braking device, this invention has better insulation performance and enhances the safety of the generator main circuit.

[0023] The opening and closing action of this utility model's fast disconnecting switch-type electric braking device is achieved by a motor-driven transmission mechanism, resulting in high mechanical transmission efficiency and a relatively low power source required for transmission (approximately 800W). Furthermore, the disconnecting switch-type electric braking device eliminates the disc spring required for closing and the self-closing force required for opening inherent in circuit breaker-type electric braking devices. Therefore, its required driving power for opening and closing is lower than that of circuit breaker-type electric braking devices, thus improving the device's mechanical lifespan. Attached Figure Description

[0024] Figure 1 A schematic diagram of the opening of the fast disconnect switch type electric braking device provided in the embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the closing of the fast disconnect switch-type electric braking device provided in this embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the open position of the device operating mechanism provided in this embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the closed position of the device operating mechanism provided in this embodiment of the utility model;

[0028] Figure 5 A schematic diagram of the device drive source component provided in an embodiment of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] Figure 1 In the middle section: 1. Separated phase enclosed busbar cylinder; 2. Main circuit conductor; 3. Arc ignition contact; 4. Stationary contact; 5. Moving contact; 6. Watch strap contact finger; 7. Moving guide rod outer cylinder; 8. Moving guide rod; 9. Short-circuit copper busbar; 10. Insulating rod; 11. Outer insulating cylinder; 12. Transmission fixed support; 13. Transmission connecting rod; 14. Transmission swing rod; 15. Transmission push rod; 16. Transmission linkage swing rod; 17. Transmission rotating swing rod; 18. Operating mechanism; 19. Control box;

[0031] Figure 3 181. Spring fixing base; 182. Energy storage spring; 183. Telescopic rod; 184. Spring crank arm; 185. Fixing flange; 186. Buffer; 187. Auxiliary switch; 188. Opening / closing position indicator; 189. Drive source assembly; 1810. Coupling; 1811. Spring pressure plate; 1812. Sliding nut; 1813. Output shaft; 1814. Buffer crank arm; 1815. Auxiliary switch linkage; 1816. Lead screw; 1817. Power crank arm; 1818. Limit switch; 1819. Crank handle hole; 1820. Auxiliary switch crank arm;

[0032] Figure 5In Chinese: 1891, three-phase asynchronous motor; 1892, gear reducer. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0034] This utility model provides a novel fast disconnecting switch type electrical braking device, including a phase-separated enclosed busbar cylinder 1, a main circuit conductor 2, an arc-inducing contact 3, and a stationary contact 4. The phase-separated enclosed busbar cylinder 1 is provided with the main circuit conductor 2. A stationary contact support is welded to the lower end of the main circuit conductor 2 to fix the stationary contact 4. The arc-inducing contact 3 is installed on the stationary contact seat, which can better protect the stationary contact from arc erosion.

[0035] It also includes a moving contact 5, a watch strap contact 6, a moving guide rod outer cylinder 7, a moving guide rod 8, a short-circuiting copper busbar 9, an insulating rod 10, an outer insulating cylinder 11, an operating mechanism 18, a control box 19, and a transmission assembly. The moving contact 5 is installed on the top of the moving guide rod 8. A transmission optical shaft is connected and fixed inside the moving guide rod 8. The outer part is the moving guide rod outer cylinder 7. Three high-current watch strap contact fingers 6 are installed at the upper end inside the moving guide rod outer cylinder 7. The short-circuiting copper busbar 9 is installed between the moving guide rod outer cylinder 7 and the outer insulating cylinder 11 of the three phases of the equipment. A through hole is opened in the middle of the installation position to facilitate the passage of the insulating rod 10 when the moving guide rod 8 moves. The three-phase short-circuiting copper busbar is overlapped between every two phases and supported by insulators between every two phases. The short-circuit braking current after the three phases of the device are closed is formed in the short-circuiting copper busbar. The insulating rod 10 is placed inside the outer insulating cylinder 11, and the upper and lower ends are connected to the transmission optical shaft and the transmission assembly, respectively. The outer swing arm on the operating mechanism 18 is connected to the transmission assembly.

[0036] In one specific embodiment, the main circuit conductor 2 is the current-carrying carrier of the main circuit, and is cylindrical in shape with regular octagonal interfaces at both ends.

[0037] In one specific embodiment, the watch strap contact finger 6 is double dovetail shaped and elastic, each contact finger has a current carrying capacity of about 100A, and there are about 52 contact fingers in each row. The contact points are linear contacts, which have a stronger current carrying capacity, so as to better realize the sliding of the moving guide rod 8 up and down in the moving guide rod outer cylinder 7.

[0038] In one specific embodiment, the inner side of the stationary contact 4 is equipped with three high-current meter strap contact fingers, which are the same as those inside the outer cylinder 7 of the moving guide rod, and can slide and make close contact with the moving contact 5.

[0039] In one specific embodiment, the transmission optical shaft is made of metal and is connected to the rib plate inside the moving guide rod 8, passing through the outer cylinder 7 and the outer insulating cylinder 11 of the moving guide rod to connect to the insulating rod 10.

[0040] In one specific embodiment, the insulating rod 10 is in the form of epoxy casting and has an external umbrella skirt structure.

[0041] In one specific embodiment, the stationary arc-starting contact is mounted on a stationary contact seat and has a cylindrical structure. A copper-tungsten alloy cylinder is fixed to the top of the contact, characterized by its high melting point and resistance to erosion. The moving arc-starting contact is mounted on top of the moving contact and is also made of copper-tungsten alloy. It contains a petal-shaped moving guide rod to facilitate the insertion and disengagement of the stationary arc-starting contact. When a closing operation is performed, the moving contact moves towards the stationary contact, and the arc-starting contact inside it makes contact first. The burning of the arc is concentrated on the arc-starting contact, protecting the safety of both the moving and stationary contacts.

[0042] In one specific embodiment, the outer swing arm on the operating mechanism 18 is connected to the transmission link 13, and the transmission swing arm 14 is connected to the transmission link 13. The transmission swing arm 14 is fixed on the rotating shaft of the base and rotates left and right around the rotating shaft. The transmission linkage swing arm 16 is also fixed on the rotating shaft of the base and rotates around the rotating shaft.

[0043] In one specific embodiment, the transmission rocker arm 14 drives the transmission linkage rocker arm 16 to rotate clockwise. While the transmission linkage rocker arm 16 rotates clockwise, it drives the transmission rotating rocker arm 17 to rotate counterclockwise around the transmission fixed support 12, and drives the transmission push rod 15 to move upward, thereby realizing the closing action.

[0044] In one specific embodiment, the drive source, consisting of a three-phase asynchronous motor 1891 and a gear reducer 1892, is connected to a lead screw 1816 via a coupling 1810, and a slider nut 1812 is mounted on the lead screw 1816. The crank arm assembly consists of components such as a fixed flange 185, a spring crank arm 184, a buffer crank arm 1814, an output shaft 1813, a power crank arm 1817, and an auxiliary switch crank arm 1820. The spring crank arm 184, the buffer crank arm 1814, the auxiliary switch crank arm 1820, and the power crank arm 1817 are all mounted on the output shaft 1813 and are staggered in axial space. The output shaft 1813 is a power output interface and is connected to an external swing arm. The auxiliary switch crank arm 1820 is connected to an auxiliary switch connecting rod 1815, and a slot is opened at the end of the connecting rod so that when the auxiliary switch crank arm 1820 rotates, the auxiliary switch connecting rod 1815 maintains horizontal linear motion. The entire crank arm assembly is fixed to the operating mechanism housing via a fixing flange 185. One end of the energy storage spring 182 is fixed to the spring crank arm 184, and the other end is fixed to the spring fixing base 181. Its internal telescopic rod 183 guides the spring compression. The buffer 186 is mainly used for buffering the opening and closing positions of the device; one is provided for the closing position and one for the opening position, working in conjunction with the buffer crank arm 1814 to prevent overshoot.

[0045] In one specific embodiment, the control box 19 is installed above the operating mechanism 18. The wiring harnesses of the three-phase asynchronous motor, limit switch and auxiliary switch in the operating mechanism are all led into the control box through the through hole of the operating mechanism housing. The control box is also equipped with a contactor for controlling the forward and reverse rotation of the motor, necessary motor protectors, indicator lights, buttons and terminal blocks and other secondary components.

[0046] Figure 1 This diagram illustrates the opening of a fast-isolating switch-type electrical braking device. When the device needs to close, the operating mechanism 18 provides a power source, driving its outer swing arm to rotate to the right. This, in turn, causes the transmission link 13 and the transmission swing rod 14 to move to the right. The slotted hole at the connecting end of the transmission swing rod 14 ensures that it maintains a constant distance from the transmission link 13 during its arc motion, thus ensuring that the transmission link 13 moves horizontally left and right. The movement of the transmission swing rod 14 causes the transmission linkage swing rod 16 to rotate clockwise. Simultaneously, the clockwise rotation of the transmission linkage swing rod 16 causes the transmission rotating swing rod 17 to rotate counterclockwise around the transmission fixed support 12, and causes the transmission top rod 15 to move upward, thereby achieving the closing action. Similarly, the slotted hole at the connecting end of the transmission fixed support 12 ensures that the transmission rotating swing rod 17 maintains a constant distance from the transmission top rod 15 during its arc motion. During the rotation, the fulcrum of the transmission rotating swing rod 17 slides within the slotted hole, enabling the transmission top rod 15 to move vertically upward.

[0047] Figure 2This is a schematic diagram of the closing of a fast-isolating switch-type electrical braking device. When the device needs to open, the operating mechanism 18 provides a reverse power source to drive the external rocker arm to move in the opposite direction. Therefore, the movement direction of the transmission mechanism is opposite to the closing direction, and its movement principle will not be described in detail.

[0048] Figure 3 This diagram illustrates the open position of the device's operating mechanism. When the device needs to close, the three-phase asynchronous motor inside the operating mechanism is energized and rotates forward, outputting power to the lead screw 1816. The slider nut 1812 moves horizontally to the left under the rotation of the lead screw 1816, driving the connected power crank arm 1817 to rotate clockwise, thus providing the output shaft 1813 with corresponding torque output. The end of the power crank arm 1817 has a slotted hole, ensuring that the slider nut 1812 moves horizontally linearly on the lead screw 1816 while the power crank arm 1817 rotates. The buffer crank arm 1814, spring crank arm 184, and auxiliary switch crank arm 1820 also rotate under the rotation of the output shaft 1813. As the spring crank arm 184 rotates clockwise, the energy storage spring 182 is continuously compressed until the rotation angle exceeds a critical point, releasing the energy of the energy storage spring 182. This instantaneously increases the rotational speed of the output shaft 1813, accelerating the closing action. When the slider nut 1812 moves to the leftmost end of the lead screw 1816 and touches the closing position limit switch 1818, the three-phase asynchronous motor is immediately de-energized, power is no longer output, and the circuit is closed.

[0049] After the three-phase asynchronous motor is powered off, it will continue to rotate at a low speed due to inertia, and the output torque will continue to decrease. The slider nut 1812 continues to move towards the left end of the lead screw 1816. The optical shaft section at the left end of the lead screw 1816 can realize the clutch function, so that the slider nut 1812 rotates freely in this section. At this time, the spring pressure plate 1811 makes the lead screw nut 1812 reliably contact the thread of the lead screw 1816, preparing for the lead screw 1816 to rotate in the opposite direction.

[0050] After the device is in the open or closed position, the auxiliary switch 187 will rotate with the auxiliary switch crank arm 1820 and change position accordingly. The open / close position indicator 188 will change position accordingly and indicate whether it is currently in the open or closed position.

[0051] Figure 4 This is a schematic diagram of the closed position of the device's operating mechanism. When the device needs to be opened, the three-phase asynchronous motor 1891 inside the operating mechanism 18 is energized and reverses. The internal lead screw assembly, crank arm assembly, energy storage assembly, and auxiliary switch assembly all move in the opposite direction to the closed position. The specific movement principle will not be elaborated further.

[0052] Figure 5 This diagram illustrates the drive source components of the device. The three-phase asynchronous motor 1891 provides the power source for the device, and the gear reducer 1892 provides speed reduction for the device's movement.

[0053] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent.

[0055] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A novel fast-disconnecting switch-type electrical braking device, characterized in that: It includes a phase-separated enclosed busbar cylinder (1), a main circuit conductor (2), an arc-starting contact (3), and a stationary contact (4). The phase-separated enclosed busbar cylinder (1) is provided with a main circuit conductor (2). A stationary contact support is welded to the lower end of the main circuit conductor (2) for fixing the stationary contact (4). The arc-starting contact (3) is installed on the stationary contact seat. It also includes a moving contact (5), a watch strap contact (6), a moving guide rod outer cylinder (7), a moving guide rod (8), a shorting copper busbar (9), an insulating rod (10), an outer insulating cylinder (11), an operating mechanism (18), a control box (19), and a transmission assembly. The moving contact (5) is installed on the top of the moving guide rod (8). The moving guide rod (8) has a transmission optical shaft connected and fixed inside by a rib plate. The outer part is the moving guide rod outer cylinder (7). Three high-current watch strap contact fingers (6) are installed at the upper end inside the moving guide rod outer cylinder (7). The shorting copper busbar (9) is installed between the moving guide rod outer cylinder (7) and the outer insulating cylinder (11) of the three phases of the equipment. The insulating rod (10) is placed inside the outer insulating cylinder (11). The upper and lower ends are connected to the transmission optical shaft and the transmission assembly, respectively. The outer swing arm on the operating mechanism (18) is connected to the transmission assembly.

2. The novel fast-disconnecting switch-type electric braking device as described in claim 1, characterized in that: The main circuit conductor (2) is the current-carrying carrier of the main circuit. It is cylindrical in shape and has regular octagonal interfaces at both ends.

3. The novel fast-disconnecting switch-type electric braking device as described in claim 1, characterized in that: The watch strap fingers (6) are double-swallowtail shaped and elastic. Each finger has a current carrying capacity of about 100A. There are 52 fingers in each row, and the contact points are linear.

4. The novel fast-disconnecting switch-type electric braking device as described in claim 1, characterized in that: The inner side of the stationary contact (4) is equipped with three high current meter strap contact fingers, which are the same as those inside the outer cylinder (7) of the moving guide rod.

5. A novel fast-disconnecting switch-type electric braking device as described in claim 1, characterized in that: The transmission optical shaft is made of metal and is connected to the rib plate inside the moving guide rod (8). It passes through the outer cylinder (7) and outer insulating cylinder (11) of the moving guide rod and connects to the insulating rod (10).

6. The novel fast-disconnecting switch-type electric braking device as described in claim 1, characterized in that: The insulating rod (10) is made of epoxy resin and has an external umbrella skirt structure.

7. A novel fast-disconnecting switch-type electric braking device as described in claim 1, characterized in that: The transmission assembly includes a transmission fixed support (12), a transmission connecting rod (13), a transmission swing rod (14), a transmission top rod (15), a transmission linkage swing rod (16), and a transmission rotating swing rod (17). The outer swing arm on the operating mechanism (18) is connected to the transmission connecting rod (13). The transmission swing rod (14) is connected to the transmission connecting rod (13). The transmission swing rod (14) is fixed on the rotating shaft of the base and rotates left and right around the rotating shaft. The transmission linkage swing rod (16) is fixed on the rotating shaft of the base and rotates around the rotating shaft. When the operation closes the circuit, the operating mechanism (18) drives its outer swing arm to rotate to the right, which in turn drives the transmission link (13) and the transmission swing arm (14) to move to the right. When the energy storage component in the operating mechanism (18) moves to the critical point, the spring energy is released rapidly, thus realizing the trend of rapid closing operation. When the circuit breaker is closed, the transmission swing rod (14) drives the transmission linkage swing rod (16) to rotate clockwise. At the same time as the transmission linkage swing rod (16) rotates clockwise, it drives the transmission rotating swing rod (17) to rotate counterclockwise around the transmission fixed support (12) and drives the transmission top rod (15) to move upward, thereby realizing the circuit breaker closing action.

8. A novel fast-disconnecting switch-type electric braking device as described in claim 7, characterized in that: The waist hole at the connecting end of the transmission swing rod (14) ensures that the distance between it and the transmission link (13) remains constant when it makes arc motion, thus ensuring that the transmission link (13) moves horizontally left and right.

9. A novel fast-disconnecting switch-type electric braking device as described in claim 7, characterized in that: The waist hole at the connecting end of the transmission fixed support (12) allows the transmission rotating rocker arm (17) to maintain a constant distance from the transmission top rod (15) when it makes an arc motion. During the rotational motion, the fulcrum of the transmission rotating rocker arm (17) slides in the waist hole, so that the transmission top rod (15) moves vertically upward.

10. A novel fast-disconnecting switch-type electric braking device as described in claim 1, characterized in that: The operating mechanism (18) includes a three-phase asynchronous motor (1891), a gear reducer (1892), and a crank arm assembly. The three-phase asynchronous motor (1891) and the gear reducer (1892) provide a power source to drive the crank arm assembly to rotate. The crank arm assembly is equipped with a rotating arm associated with the spring energy storage assembly.

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