Opening and closing structure of reclosing circuit breaker

Abstract

The invention relates to the technical field of circuit breakers, and discloses a switching-on and switching-off structure of a reclosing circuit breaker, which comprises a shell, a static contact, a moving contact, a switching-on and switching-off knife switch and a switching-on assembly, and the static contact and the moving contact are arranged in the shell. The closing assembly comprises a driving motor and a transmission part arranged between the opening and closing knife switch and an output shaft of the driving motor, the driving motor can drive the transmission part to act, and the transmission part can drive the opening and closing knife switch to act. When an instantaneous fault of a circuit where the circuit breaker is located disappears, the driving motor drives the transmission part to act and further drives the opening and closing knife switch to act, direct driving of a power source is achieved, the mechanical structure is simplified, the fault probability caused by complex mechanical interlocking and lock catch abrasion and jamming is reduced, the mechanical response time is shortened, and the service life of the circuit breaker is prolonged. And the execution speed of the automatic reclosing is improved, so that the intelligent power grid can recover power supply more quickly.

Description

Technical Field

[0001] This application relates to the technical field of circuit breakers, and in particular to the opening and closing structure of a reclosing circuit breaker. Background Technology

[0002] As a key protection device in smart grids, reclosing circuit breakers automatically perform a "trip-delay-reclosing" operation after a transient fault occurs on a transmission line. This design aims to quickly distinguish between transient and permanent faults: if the fault has disappeared, power supply can be restored rapidly, greatly reducing unnecessary power outages and thus significantly improving power supply reliability and system stability. In building a highly resilient and self-healing modern smart grid system, this technology plays an irreplaceable role in maintaining continuous power supply, reducing perceived interruptions for users, and ensuring the overall safe and efficient operation of the power grid.

[0003] In existing typical technical solutions, reclosing circuit breakers are usually composed of the circuit breaker body and an automatic reclosing controller. The core of its mechanical actuation part is a spring-energy-storage operating mechanism. Specifically, the mechanism contains a closing spring, which is pre-compressed and energy-stored by a motor, and locked in the energy-storage state by a precision mechanical locking device. When the line fault is cleared by the protection unit, the reclosing controller issues a command after a preset delay, energizing the closing electromagnet and releasing the mechanical lock. After the lock is released, the mechanical energy stored in the spring is instantly converted into kinetic energy, driving the moving contact to move through a linkage transmission system, ultimately completing the closure with the stationary contact, thereby achieving automatic restoration of power to the line.

[0004] However, the aforementioned operating method relying on springs and mechanical latches has inherent limitations. From the moment the electromagnet receives the electrical signal to the final contact closure, it must go through multiple mechanical steps in sequence, including electromagnet engagement, latch release, spring release, and linkage transmission. This series of actions not only directly causes an overall delay in the reclosing operation, affecting the instantaneous power restoration, but also introduces potential reliability risks due to its complex mechanical structure and numerous parts. The latch mechanism itself, as a key point of stress concentration and precise coordination, is prone to wear, jamming, or even failure under frequent operation, leading to reclosing failure. Once a fault occurs, the troubleshooting and repair procedures are cumbersome, directly causing the power outage time of the faulty line to be unnecessarily extended. This fundamentally restricts the smart grid's pursuit of ultra-high power supply reliability and rapid self-healing capabilities, and is a technical bottleneck that urgently needs improvement. Summary of the Invention

[0005] In order to improve the automatic closing efficiency of reclosing circuit breakers and the reliability of power restoration, this application provides a reclosing circuit breaker opening and closing structure.

[0006] The opening and closing structure of a reclosing circuit breaker provided in this application adopts the following technical solution: A reclosing circuit breaker's opening and closing structure includes a housing, stationary and moving contacts disposed within the housing, opening and closing switches, and a closing assembly. The opening and closing switches are connected to the moving contacts via a linkage transmission mechanism. The closing assembly is used to drive the opening and closing switches to close. The closing assembly includes a drive motor and a transmission component disposed between the opening and closing switches and the output shaft of the drive motor. The drive motor can drive the transmission component to move, and the transmission component can drive the opening and closing switches to move.

[0007] By adopting the above technical solution, once the transient fault in the circuit breaker's line disappears, the reclosing controller will control the drive motor to start rotating. Upon receiving the closing command, the drive motor's rotational output can be directly and continuously converted into the action of the transmission components, thereby driving the opening and closing switches, achieving direct drive of the power source. This significantly simplifies the mechanical structure, reduces the number of parts, and fundamentally reduces the probability of failures caused by complex mechanical interlocks and latch wear and jamming. Simultaneously, the direct drive method shortens the mechanical response time and improves the execution speed of automatic reclosing, thus helping to restore power supply more quickly, improving the reliability and efficiency of reclosing operations, and meeting the requirements of smart grids for rapid self-healing capabilities.

[0008] Optionally, the output shaft of the drive motor is provided with a push rod, and the housing of the drive motor is provided with a mounting block and a connecting spring. One end of the connecting spring is provided on the mounting block, and the other end is provided with an abutment block. Both the abutment block and the connecting spring are provided on the side where the push rod rotates in the direction of opening. When the opening / closing switch is in the opening position, the abutment block abuts against the push rod, and the connecting spring has a tendency to drive the abutment block closer to the push rod.

[0009] By adopting the above technical solution, when the switch is in the open position, the abutment block is pressed against the push rod under the action of the connecting spring, and continuously applies a force in the closing direction to the push rod, but this force is not enough to push the push rod to rotate. Then, when the drive motor starts to rotate in the closing direction, at the instant the output shaft of the drive motor starts to rotate, the connecting spring releases its elastic force, causing the abutment block to move closer to the push rod. The output shaft is pushed by the push rod, thereby assisting the output shaft to drive the transmission component to move, which in turn facilitates the transmission component to drive the switch to close. This reduces the possibility of the output shaft of the drive motor lagging behind due to the inertia of gravity at the moment of startup, ensuring the instantaneous starting effect of the drive motor, and thus improving the automatic reclosing efficiency of the reclosing circuit breaker.

[0010] Optionally, a reset block is slidably disposed on the housing of the drive motor, and a guide slope is provided on the abutment block to guide the abutment block closer to the mounting block. A rotating rod is also rotatably disposed on the housing of the drive motor. One end of the rotating rod is rotatably connected to the reset block and the other end is rotatably connected to the opening and closing switch. Both ends of the rotating rod are provided with clearance holes, and a rotating shaft is slidably disposed in the clearance holes. The rotating shaft is rotatably disposed on the reset block and the opening and closing switch. When the opening and closing switch rotates in the closing direction, the rotating rod drives the reset block to slide closer to the abutment block.

[0011] By adopting the above technical solution, when the switch blade rotates in the closing direction, it will drive the end of the rotating rod connected to the reset block to approach the abutment block, thereby driving the reset block to slide towards the side closer to the abutment block. When the switch blade rotates to a position close to the fully closed position, the reset block slides to abut against the guide slope. With the continued rotation of the rotating rod, the reset block slides along the guide slope and pushes the abutment block towards the side closer to the mounting block, thereby resetting the abutment block. The connecting spring returns to its compressed length, and at the same time, the abutment block moves away from the push rod. Thus, when the line fault occurs and the circuit automatically trips, the abutment block does not easily obstruct the output axis rotation of the push rod and drive motor in the direction of tripping, making it easier for the switch blade to trip. While assisting in the closing, it also ensures that the line fault can be disconnected normally, thereby ensuring that the electrical equipment is not easily damaged during line faults.

[0012] Optionally, a reset spring is provided on the side of the reset block away from the abutment block. The reset spring can push the reset block closer to the abutment block. A sliding hole is provided on the reset block, and the rotating shaft is slidably disposed in the sliding hole.

[0013] By adopting the above technical solution, the reset spring continuously applies a pushing force towards the abutment block to the reset block, thereby locking the abutment block in the position of compressing the connecting spring. This ensures that the abutment block does not move towards the push rod, thus guaranteeing the opening efficiency of the push rod and the opening / closing switch. When the opening / closing switch begins to rotate in the opening direction, it first drives the end of the rotating rod connected to the reset block to slide in the sliding hole, causing one end of the rotating rod and the rotating shaft to move away from the abutment block until the rotating shaft abuts against the wall of the sliding hole. Then, as the opening / closing switch continues to rotate in the opening direction, the rotating rod drives the reset block to slide away from the abutment block and releases it. The abutment block then approaches the push rod under the action of the connecting spring. At the same time, the push rod rotates in the opening direction to a position close to the abutment block. Finally, the abutment block abuts against the push rod and continuously applies a closing assist force to the push rod, so that the drive motor can be started when closing next, thereby improving the reclosing efficiency of the circuit breaker. With the above settings, when the switch begins to open, the reset block will not immediately release the abutment block. Instead, when the switch rotates to a position close to the fully open position (at which point the opening resistance of the switch will be smaller than the resistance at the beginning of the opening process), the reset block will release the abutment block, and the abutment block will move towards the side closer to the push rod. This further makes it less likely for the abutment block to obstruct the push rod from rotating in the direction of opening, and further facilitates the opening of the switch.

[0014] Optionally, the transmission component includes a drive gear mounted on the output shaft of the drive motor, a driven gear meshing with the drive gear, and a drive rod mounted on the driven gear. One end of the drive rod is rotatably mounted on the driven gear, and the other end has an oblong hole, through which the opening and closing switch passes.

[0015] By adopting the above technical solution, a specific gear-linkage transmission component consisting of a driving gear, a driven gear, and a drive rod with a waist-shaped hole achieves a precise and smooth conversion from rotary motion to oscillating motion. The driving gear meshes with the driven gear, the transmission ratio is fixed, and the motion coordination is reliable. This also simplifies the structure of the transmission component, ensuring the reliability of the circuit breaker during long-term operation, facilitating maintenance of the transmission component, and improving the success rate of reclosing operations. The waist-shaped hole at one end of the drive rod engages with the opening / closing switch, forming a sliding hinge point that effectively converts the compound motion of the drive rod into the pure rotation of the opening / closing switch around its axis. This transmission method is highly efficient, transmits large forces, and the waist-shaped hole absorbs some installation errors and motion deformation, ensuring reliable meshing and low-wear operation under high torque transmission.

[0016] Optionally, the transmission component further includes a manual gear that meshes with the driven gear. The manual gear is rotatably mounted on the housing. A handle is provided on the shaft of the manual gear. The housing has a mounting hole for the handle to extend out. The handle has an internal hexagonal groove.

[0017] By adopting the above technical solution, in scenarios where the reclosing controller malfunctions, experiences power outages, or requires maintenance, operators can use standard tools such as an Allen wrench to operate the handle, thereby driving the manual gear and driven gear, which in turn actuates the drive rod, ultimately achieving the opening and closing operation of the switch. This achieves mechanical decoupling and rapid switching between electric and manual modes, without relying on electrical control circuits, greatly enhancing the equipment's emergency response capabilities and maintenance convenience, and improving the overall safety and practicality of the product.

[0018] Optionally, it also includes a protective box disposed in the housing, wherein both the moving contact and the stationary contact are disposed in the protective box, and the protective box is provided with a closing hole for the opening and closing knife to extend, and the drive motor is disposed on one side of the protective box in the vertical direction.

[0019] By adopting the above technical solution, an independent protective enclosure is set up to house the moving and stationary contacts, and the drive motor is arranged on the side of the protective enclosure, achieving physical isolation between the arc generation area and the precision mechanical transmission area. The protective enclosure effectively confines the arc and metal vapor generated when the contacts open and close, preventing them from causing pollution, corrosion, or degradation of the insulation performance of the transmission components. At the same time, the side-arrangement of the drive motor optimizes the overall spatial layout, ensuring that the drive motor does not coincide with the position of the protective enclosure in the front-to-back direction of the housing, thereby reducing the thickness of the reclosing circuit breaker along the front-to-back direction of the housing, thus reducing the size and footprint of the circuit breaker. The high-voltage live parts and the low-voltage control and drive parts are clearly separated, facilitating heat dissipation, wiring, and maintenance, and improving the safety level, reliability, and maintainability of the equipment.

[0020] Optionally, the radius of the driving gear is larger than the radius of the driven gear, and the radius of the manual gear is smaller than the radius of the driven gear.

[0021] By adopting the above technical solution, since the radius of the driving gear is larger than that of the driven gear, a reduction and torque amplification transmission structure is formed. This allows the drive motor to operate at a relatively high speed and low torque, which is beneficial for motor selection and miniaturization. The torque output to the driven gear and drive rod is amplified, thereby ensuring sufficient power to overcome contact pressure, frictional resistance, etc., and reliably drive the opening and closing knife to complete the closing operation. At the same time, the radius of the manual gear is smaller than that of the driven gear, so that the force applied by the operator to the handle during manual operation is further amplified, enabling the entire transmission system to be driven with less effort, reducing the intensity requirements of manual operation and improving human-machine efficiency.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By using a push rod, abutment block and connecting spring on the output shaft of the drive motor, when the opening and closing switch is in the opening position, the push rod continuously applies a pre-push force to the output shaft in the closing direction, so that the drive motor is less likely to lag due to its own gravity or inertia after receiving the closing signal from the reclosing controller, thus further accelerating the reclosing efficiency of the circuit breaker. 2. When the switch closes, the rotating rod drives the reset block to move closer to the abutment block, and in the final stage of closing, the abutment block is reset to move away from the push rod. This means that during the opening process of the switch, the output shaft of the drive motor does not need to overcome the elastic force of the connecting spring, reducing the drive power required for opening. This ensures that the switch can open normally and quickly when a line fault occurs. 3. When the reclosing controller sends a closing signal to the drive motor, the output shaft of the drive motor drives the driven gear to rotate through the driving gear. Then the driven gear drives the drive rod to move, thereby driving the opening and closing switch to move. This makes the transmission structure between the drive motor and the opening and closing switch simple, and the cooperation between the driving gear and the driven gear reliable, ensuring the efficiency of the reclosing action. Moreover, the simple transmission structure makes maintenance easy and extends the service life of the circuit breaker. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0024] Figure 2 This is a schematic diagram of the structure of the moving contact shown behind the hidden portion of the housing and protective box in Embodiment 1 of this application.

[0025] Figure 3 This is a structural schematic diagram of the transmission component shown after the hidden portion of the housing in Embodiment 1 of this application.

[0026] Figure 4 This is a schematic diagram of the push rod structure shown after concealing part of the housing and the drive gear in Embodiment 2 of this application.

[0027] Explanation of reference numerals in the attached figures: 1. Housing; 11. Protective box; 111. Closing hole; 12. Mounting hole; 2. Stationary contact; 3. Moving contact; 4. Opening and closing knife; 5. Closing assembly; 51. Drive motor; 511. Push rod; 512. Mounting block; 513. Connecting spring; 514. Abutment block; 515. Reset block; 516. Guide slope; 517. Rotating rod; 518. Clearance hole; 519. Rotating shaft; 52. Transmission component; 521. Drive gear; 522. Driven gear; 523. Drive rod; 524. Waist-shaped hole; 525. Manual gear; 526. Handle; 527. Internal hexagonal slot; 6. Reset spring; 61. Sliding hole. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses a reclosing circuit breaker's opening and closing structure.

[0030] Example 1 Reference Figure 1 , Figure 2 and Figure 3 A reclosing circuit breaker's opening and closing structure includes a housing 1, a stationary contact 2, a moving contact 3, an opening and closing knife 4, and a closing assembly 5. The housing 1 is provided with a protective box 11. The opening and closing knife 4 is connected to the moving contact 3 through a linkage transmission mechanism. The stationary contact 2, the moving contact 3, and the linkage transmission mechanism are all housed in the protective box 11. The closing assembly 5 is used to drive the opening and closing knife 4 to close.

[0031] Reference Figure 2 and Figure 3 The protective box 11 has a closing hole 111 for the opening and closing knife 4 to extend. The function of the protective box 11 is to protect the moving contact 3 and the stationary contact 2 from external dust, water vapor and other damage, and it can also play a certain role in insulation.

[0032] Reference Figure 3 The closing assembly 5 includes a drive motor 51 and a transmission component 52. The drive motor 51 is located on one side of the protective box 11 along the vertical direction, which makes the overall structure layout more reasonable, facilitates installation and maintenance, and reduces the footprint of the reclosing circuit breaker.

[0033] Reference Figure 3 The transmission component 52 is disposed between the opening / closing switch 4 and the output shaft of the drive motor 51. The drive motor 51 can drive the transmission component 52 to move, and the transmission component 52 can drive the opening / closing switch 4 to move. The drive motor 51 can be a DC motor or an AC motor, etc., which has the characteristics of convenient control and fast response speed.

[0034] Reference Figure 3 The transmission component 52 includes a driving gear 521 mounted on the output shaft of the drive motor 51, a driven gear 522 meshing with the driving gear 521, and a drive rod 523 mounted on the driven gear 522. The driving gear 521 can be fixed to the output shaft of the drive motor 51 by means of a key connection or other means. When the drive motor 51 rotates, the driving gear 521 rotates accordingly. The driven gear 522 meshes with the driving gear 521, transmitting the rotation of the driving gear 521 to the driven gear 522.

[0035] Reference Figure 2 and Figure 3One end of the drive rod 523 is rotatably mounted on the driven gear 522, typically through a pin or similar means. The other end has a slotted hole 524 through which the opening / closing switch 4 passes. When the driven gear 522 rotates, the drive rod 523 swings along with it, driving the opening / closing switch 4 through the wall of the slotted hole 524, ultimately achieving the opening / closing of the moving contact 3 and the stationary contact 2.

[0036] Reference Figure 3 The radius of the driving gear 521 is larger than that of the driven gear 522. The larger radius of the driving gear 521 can reduce the speed of the driven gear 522 and increase the torque when the speed of the drive motor 51 is constant, making the operation of the opening and closing switch 4 more stable.

[0037] Reference Figure 3 This combination method utilizes the stability and precision of gear transmission, which can accurately transmit the power of the drive motor 51 to the opening and closing switch 4, avoiding the complex action chain in the traditional mechanical locking method, and improving the timeliness and reliability of reclosing operation.

[0038] Reference Figure 1 and Figure 3 The transmission component 52 also includes a manual gear 525 that meshes with the driven gear 522. The manual gear 525 is rotatably mounted on the housing 1. A handle 526 is provided on the shaft of the manual gear 525. The housing 1 has a mounting hole 12 for the handle 526 to extend out. The handle 526 has an internal hexagonal groove 527.

[0039] Reference Figure 3 The manual gear 525 provides a manual operation function for the reclosing circuit breaker. When the drive motor 51 malfunctions or needs to be manually adjusted, an Allen wrench can be inserted into the Allen socket 527 of the handle 526 to rotate the manual gear 525, thereby driving the driven gear 522 and the opening / closing knife 4 to operate and realize the opening / closing operation.

[0040] Reference Figure 3 The radius of the manual gear 525 is smaller than that of the driven gear 522, which achieves different transmission ratios. The smaller radius of the manual gear 525 allows for a larger rotation angle to be achieved with less force during manual operation, making manual operation more convenient.

[0041] The implementation principle of the reclosing circuit breaker's opening and closing structure in this embodiment is as follows: the drive motor 51 drives the transmission component 52 to move, which in turn drives the opening and closing switch 4 to move, thus realizing the opening and closing operation of the reclosing circuit breaker. Compared with the traditional spring and mechanical latch operation method, this reduces multiple mechanical links, lowers the delay in reclosing operation, and improves the timeliness and reliability of power restoration. At the same time, due to the relatively simple mechanical structure and fewer parts, reliability risks are reduced, the risk of wear, jamming, or even failure of the latch mechanism is reduced, and the success rate of reclosing is improved.

[0042] Example 2 Reference Figure 4 The difference between this embodiment and Embodiment 1 is that: a push rod 511 is provided on the output shaft of the drive motor 51, and a mounting block 512 and a connecting spring 513 are provided on the housing of the drive motor 51. One end of the connecting spring 513 is provided on the mounting block 512, and the other end is provided with an abutment block 514. Both the abutment block 514 and the connecting spring 513 are provided on the side where the push rod 511 rotates in the direction of opening. The abutment block 514 is slidably provided on the housing of the drive motor 51. When the switch 4 is in the open position (the figure shows the closed position), the abutment block 514 abuts against the push rod 511, and the connecting spring 513 has a tendency to drive the abutment block 514 closer to the push rod 511.

[0043] Reference Figure 4 A reset block 515 is slidably disposed on the housing of the drive motor 51, and a guide slope 516 is provided on the abutment block 514. The guide slope 516 is used to guide the abutment block 514 to approach the mounting block 512. A rotating rod 517 is rotatably disposed on the housing of the drive motor 51. One end of the rotating rod 517 is rotatably connected to the reset block 515, and the other end is rotatably connected to the opening and closing switch 4.

[0044] Reference Figure 4 Both ends of the rotating rod 517 are provided with clearance holes 518, and rotating shafts 519 are slidably disposed in the clearance holes 518. The two rotating shafts 519 are respectively rotatably disposed on the reset block 515 and the opening / closing switch 4. When the opening / closing switch 4 rotates in the closing direction, the rotating rod 517 drives the reset block 515 to slide closer to the abutment block 514.

[0045] Reference Figure 4 A reset spring 6 is provided on the side of the reset block 515 away from the abutment block 514. The reset spring 6 can push the reset block 515 closer to the abutment block 514. A sliding hole 61 is provided on the reset block 515, and the rotating shaft 519 is slidably disposed in the sliding hole 61. The opening of the sliding hole 61 provides redundant space for the rotation of the rotating rod 517, avoids hard contact between the rotating shaft 519 and the reset block 515, protects the rotating rod 517 from damage, and extends the service life of the reclosing circuit breaker.

[0046] Reference Figure 4 When the circuit is closed, when the drive motor 51 starts to drive the booster rod 511 to rotate, the abutment block 514 can always keep in contact with the booster rod 511 under the action of the connecting spring 513, so as to play an auxiliary boosting role.

[0047] Reference Figure 4 The function of the reset spring 6 is to push the reset block 515 close to the abutment block 514 in the final stage of closing the switch 4, so that the abutment block 514 can automatically reset to the position close to the mounting block 512 after closing, so as not to obstruct the push rod 511 from rotating in the direction of opening, ensuring that the switch 4 can open normally, and at the same time preparing for the next reclosing operation.

[0048] The implementation principle of the reclosing circuit breaker's opening and closing structure in this application embodiment is as follows: through the push rod 511, the abutment block 514, and the connecting spring 513 set on the output shaft of the drive motor 51, when the opening and closing switch 4 is in the open position, the push rod 511 continuously applies a pre-push force to the output shaft in the closing direction, so that after the drive motor 51 receives the closing signal from the reclosing controller, it is not easy for its own gravity or inertia to cause lag in rotation, further accelerating the reclosing efficiency of the circuit breaker.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reclosing circuit breaker's opening and closing structure, comprising a housing (1), a stationary contact (2) and a moving contact (3) disposed in the housing (1), an opening / closing switch (4), and a closing assembly (5), wherein the opening / closing switch (4) is connected to the moving contact (3) via a linkage transmission mechanism, and the closing assembly (5) is used to drive the opening / closing switch (4) to close, characterized in that: The closing assembly (5) includes a drive motor (51) and a transmission component (52) disposed between the opening and closing switch (4) and the output shaft of the drive motor (51). The drive motor (51) can drive the transmission component (52) to move, and the transmission component (52) can drive the opening and closing switch (4) to move.

2. The opening and closing structure of a reclosing circuit breaker according to claim 1, characterized in that: The output shaft of the drive motor (51) is provided with a push rod (511). The housing of the drive motor (51) is provided with a mounting block (512) and a connecting spring (513). One end of the connecting spring (513) is provided on the mounting block (512), and the other end is provided with an abutment block (514). The abutment block (514) and the connecting spring (513) are both provided on the side where the push rod (511) rotates in the direction of opening. When the opening and closing switch (4) is in the opening position, the abutment block (514) abuts against the push rod (511), and the connecting spring (513) has a tendency to drive the abutment block (514) closer to the push rod (511).

3. The opening and closing structure of a reclosing circuit breaker according to claim 2, characterized in that: A reset block (515) is slidably disposed on the housing of the drive motor (51), and a guide slope (516) is provided on the abutment block (514). The guide slope (516) is used to guide the abutment block (514) to approach the mounting block (512). A rotating rod (517) is rotatably disposed on the housing of the drive motor (51). One end of the rotating rod (517) is rotatably connected to the reset block (515), and the other end is rotatably connected to the opening and closing switch (4). Both ends of the rotating rod (517) are provided with clearance holes (518). A rotating shaft (519) is slidably disposed in the clearance hole (518). The rotating shaft (519) is rotatably disposed on the reset block (515) and the opening and closing switch (4). When the opening and closing switch (4) rotates in the closing direction, the rotating rod (517) drives the reset block (515) to slide in the direction close to the abutment block (514).

4. The opening and closing structure of a reclosing circuit breaker according to claim 3, characterized in that: A reset spring (6) is provided on the side of the reset block (515) away from the abutment block (514). The reset spring (6) can push the reset block (515) closer to the abutment block (514). A sliding hole (61) is provided on the reset block (515), and the rotating shaft (519) is slidably disposed in the sliding hole (61).

5. The opening and closing structure of a reclosing circuit breaker according to claim 1, characterized in that: The transmission component (52) includes a drive gear (521) mounted on the output shaft of the drive motor (51), a driven gear (522) meshing with the drive gear (521), and a drive rod (523) mounted on the driven gear (522). One end of the drive rod (523) is rotatably mounted on the driven gear (522), and the other end has an oblong hole (524). The opening and closing switch (4) passes through the oblong hole (524).

6. The opening and closing structure of a reclosing circuit breaker according to claim 5, characterized in that: The transmission component (52) also includes a manual gear (525) that meshes with the driven gear (522). The manual gear (525) is rotatably mounted on the housing (1). A handle (526) is provided on the shaft of the manual gear (525). The housing (1) has a mounting hole (12) for the handle (526) to extend out. The handle (526) has an internal hexagonal groove (527).

7. The opening and closing structure of a reclosing circuit breaker according to claim 5, characterized in that: It also includes a protective box (11) set in the housing (1), the moving contact (3) and the stationary contact (2) are both set in the protective box (11), the protective box (11) is provided with a closing hole (111) for the opening and closing knife (4) to extend, and the drive motor (51) is set on one side of the protective box (11) in the vertical direction.

8. The opening and closing structure of a reclosing circuit breaker according to claim 6, characterized in that: The radius of the driving gear (521) is greater than the radius of the driven gear (522), and the radius of the manual gear (525) is smaller than the radius of the driven gear (522).

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