Limiting anti-maloperation drop-out fuse transmission structure and use method

Abstract

The invention discloses a limiting anti-maloperation drop-out fuse transmission structure and a use method, and relates to the technical field of power distribution network power equipment.The limiting anti-maloperation drop-out fuse transmission structure comprises a mounting bracket, a transmission mechanism and a locking mechanism, the first end of the transmission mechanism is provided with a rotatable limiting piece used for lifting and limiting the transverse displacement of a fuse tube of the fuse; the locking mechanism is movably connected with the transmission mechanism, the locking mechanism has a locking state and a releasing state, and in the locking state, the locking mechanism limits rotation of the transmission mechanism so as to maintain lifting of the fuse tube by the rotatable limiting piece; the locking mechanism responds to the fuse fusing signal and is switched to the release state, in the release state, the locking mechanism relieves limitation on the transmission mechanism so that the rotatable limiting piece can fall off and lift the fuse tube, the structure is simple, use is convenient, the action reliability is effectively improved, the fixing stability is effectively improved, and the operation and maintenance safety is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of power distribution network equipment technology, and in particular to a limit-stop anti-maloperation drop-out fuse transmission structure and its usage method. Background Technology

[0002] As a core overcurrent protection device, the fuse is indispensable in high and low voltage power distribution systems, control systems, and various electrical equipment. Its core function is to quickly isolate the faulty circuit by blowing the fuse wire when a short circuit or overcurrent fault occurs. In actual operation of the power distribution network, when the fault current exceeds the specified threshold, the fuse wire inside the fuse will quickly melt, and then the fuse tube will automatically drop under the action of the transmission structure, thereby cutting off the fault circuit.

[0003] However, conventional drop-out fuses currently on the market have obvious defects in their transmission structure design, making it difficult for them to meet the requirements of complex outdoor environments in terms of operational reliability. First, conventional fuses rely entirely on gravity to fall off the fuse tube. This passive operation is highly susceptible to external interference, such as wind, installation angle deviation, and rain impact, all of which can lead to delayed or malfunctioning operation, failing to isolate faults in a timely manner. Second, the contact pressure is maintained solely by the initial preload of the spring sheet. Under the fatigue effect of long-term operation or the instantaneous impact of short-circuit current, the elasticity of the spring sheet is prone to deterioration, resulting in a drop in contact pressure. This can lead to poor contact, overheating, and other operational problems, potentially expanding the scope of the fault in severe cases. Third, the fixing methods of some fuse tubes to the brackets and transmission structures are simple and crude, posing a safety hazard of accidental fuse tube falls under extreme external forces such as strong winds and earthquakes. In addition, after a fuse trips, maintenance personnel must climb to a height and approach the live conductor to replace the fuse tube or fuse wire, which is not only inefficient but also poses a significant threat to the personal safety of the operators.

[0004] Given the numerous shortcomings of the existing technologies, developing a drop-out fuse transmission structure that is precise in action, reliable in preventing malfunctions, and convenient in maintenance has become an urgent need for upgrading power distribution network equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a limit-stop anti-misoperation transmission structure and usage method for drop-out fuses, so as to solve the problems existing in the prior art. The structure is simple, easy to use, effectively improves the reliability of operation, effectively improves the stability of fixation, and effectively improves the safety of operation and maintenance.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a limit-stop and anti-misoperation transmission structure for a drop-out fuse, comprising: a mounting bracket, a transmission mechanism, and a locking mechanism. The transmission mechanism is rotatably mounted on the mounting bracket, and a rotatable limiting member is provided at the first end of the transmission mechanism for supporting and limiting the lateral displacement of the fuse tube. The locking mechanism is movably connected to the transmission mechanism and has a locked state and a released state. In the locked state, the locking mechanism restricts the rotation of the transmission mechanism to maintain the support of the fuse tube by the rotatable limiting member. In response to a fuse blowing signal, the locking mechanism switches to a released state. In the released state, the locking mechanism releases the restriction on the transmission mechanism, causing the rotatable limiting member to fall and releasing the support of the fuse tube.

[0007] Preferably, the transmission mechanism includes a rotating shaft, a push rod, and a pressure rod. The rotating shaft is rotatably connected to the mounting bracket. One end of the push rod is fixedly connected to the rotating shaft. The rotatable limiting member is disposed at the other end of the push rod. One end of the pressure rod is fixedly connected to the rotating shaft, and the pressure rod is movably connected to the locking mechanism.

[0008] Preferably, the rotatable limiting component is a first limiting roller fitted on the end of the push rod. The first limiting roller is rotatably connected to the push rod through a bearing. An arc-shaped limiting groove is provided on the outer periphery of the first limiting roller, and the arc-shaped limiting groove matches the outer periphery of the fuse tube.

[0009] Preferably, the first limiting roller is made of nylon.

[0010] Preferably, one end of the rotating shaft is rotatably connected to the mounting bracket via a bearing.

[0011] Preferably, both the push rod and the pressure rod are welded and fixed to the rotating shaft, and the weight of the push rod is greater than the weight of the pressure rod so that when the transmission mechanism is in the released state, the push rod rotates downward under the action of gravity, thereby causing the rotatable limiting member to fall and release the support of the fuse tube.

[0012] Preferably, the locking mechanism includes a guide sleeve, a push rod, and a driving mechanism. The guide sleeve is fixedly connected to the mounting bracket and has a vertical guide hole. One end of the push rod passes through the guide hole and abuts against the top surface of the pressure rod. The fixed end of the driving mechanism is fixedly connected to the mounting bracket, and the driving end of the driving mechanism is drivenly connected to the push rod so that the push rod abuts against the pressure rod, keeping the transmission structure in a locked state. It can also drive the push rod to move upward and disengage from the pressure rod, switching the transmission structure to a released state.

[0013] Preferably, the bottom end of the top rod is provided with a second limiting roller, which is used to roll in connection with the top surface of the pressure rod.

[0014] Preferably, the driving mechanism is a drive motor. The drive motor responds to the fuse blowing signal of the fuse or an external control command. When the fuse blowing signal is received, the drive motor drives the push rod to move upward along the guide hole, causing the push rod to disengage from the pressure rod. At this time, the transmission mechanism rotates around the pivot under the gravity of the push rod, and the rotatable limiter falls downward with the push rod, releasing the support of the fuse tube. The fuse tube falls under its own gravity to achieve circuit disconnection. When it is necessary to close the circuit, the drive motor is reversed by external operation, causing the push rod to move downward and re-abut against the pressure rod, pushing the pressure rod to rotate upward around the pivot, thereby driving the push rod and the rotatable limiter to reset upward until the rotatable limiter re-supports the fuse tube and the locking mechanism returns to the locked state.

[0015] This invention provides a method for using the limit-stop anti-misoperation transmission structure of a drop-out fuse as described in any of the preceding claims, characterized by comprising the following steps: In the locked state, the locking mechanism restricts the rotation of the transmission mechanism so that the rotatable limiting member lifts and restricts the fuse tube of the fuse. In response to the fuse blowing signal of the fuse, the locking mechanism is controlled to switch to the released state; In the released state, the transmission mechanism rotates and causes the rotatable limiting member to fall, thereby releasing the support of the fuse tube and causing the fuse tube to fall to achieve circuit disconnection. When it is necessary to close the circuit, the locking mechanism is controlled to return to the locked state, and the transmission mechanism is driven to rotate in the opposite direction so that the rotatable limiter can lift the fuse tube again.

[0016] The present invention achieves the following technical effects compared to the prior art: This invention provides a limit-positioning anti-maloperation transmission structure and method for a drop-out fuse. By incorporating a rotatable limiter in the transmission mechanism, the fuse tube is stably supported while its lateral displacement is effectively limited, preventing maloperation caused by accidental shaking of the fuse tube due to external vibrations or wind. The locking mechanism further enhances structural safety. Under normal operating conditions, the locking mechanism is locked, ensuring stable support of the fuse tube by the rotatable limiter by restricting the rotation of the transmission mechanism, preventing the fuse tube from falling under non-fault conditions. When a fuse blowing signal is received, the locking mechanism quickly switches to the release state, releasing the restriction on the transmission mechanism. This allows the transmission mechanism, under its own structural characteristics, to cause the rotatable limiter to fall, reliably releasing the support of the fuse tube and achieving rapid circuit disconnection. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the limiting and anti-misoperation transmission structure of the drop-out fuse provided by the present invention; Figure 2 A front view of the limit-positioning and anti-misoperation drop-out fuse transmission structure provided by the present invention; In the diagram: 1. Fuse; 11. Fuse tube; 2. First limit roller; 3. Push rod; 4. Rotary shaft; 5. Pressure rod; 6. Guide sleeve; 7. Top rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a limit-stop anti-misoperation transmission structure and usage method for drop-out fuses, so as to solve the problems existing in the prior art. The structure is simple, easy to use, effectively improves the reliability of operation, effectively improves the stability of fixation, and effectively improves the safety of operation and maintenance.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 This embodiment provides a limit-stop and anti-misoperation transmission structure for a drop-out fuse, such as... Figures 1-2As shown, the structure includes: a mounting bracket, a transmission mechanism, and a locking mechanism. The transmission mechanism is rotatably mounted on the mounting bracket, and its first end is provided with a rotatable limiting member for supporting and limiting the lateral displacement of the fuse tube 11 of the fuse 1. The locking mechanism is movably connected to the transmission mechanism and has a locked state and a released state. In the locked state, the locking mechanism restricts the rotation of the transmission mechanism to maintain the support of the rotatable limiting member on the fuse tube 11. In response to the fuse 1 fuse blowing signal, the locking mechanism switches to the released state. In the released state, the locking mechanism releases the restriction on the transmission mechanism, causing the rotatable limiting member to fall and releasing the support of the fuse tube 11. By clearly dividing the structure into a mounting bracket, a transmission mechanism, and a locking mechanism, functional modularization is achieved, which facilitates assembly and maintenance. The rotatable limiting member has both supporting and lateral limiting functions, solving the problem of the fuse tube 11 easily wobbling left and right. The dual-state design of the locking mechanism ensures stability during normal operation and rapid response during failure, avoiding malfunctions and action delays.

[0023] In a preferred embodiment, the transmission mechanism includes a rotating shaft 4, a push rod 3, and a pressure rod 5. The rotating shaft 4 is rotatably connected to the mounting bracket. One end of the push rod 3 is fixedly connected to the rotating shaft 4, and a rotatable limiting component is provided at the other end of the push rod 3. One end of the pressure rod 5 is fixedly connected to the rotating shaft 4, and the pressure rod 5 is movably connected to the locking mechanism. This refines the transmission mechanism into a combination structure of the rotating shaft 4, the push rod 3, and the pressure rod 5, making the force transmission path clearer. The rotatable connection between the rotating shaft 4 and the mounting bracket ensures the flexibility of the transmission. The push rod 3 and the pressure rod 5 respectively undertake the functions of lifting and locking, with clear division of labor, improving the accuracy of the transmission mechanism's operation and avoiding the decrease in reliability caused by the overload of a single component.

[0024] In a preferred embodiment, the rotatable limiting component is a first limiting roller 2 fitted onto the end of the push rod 3. The first limiting roller 2 is rotatably connected to the push rod 3 via a bearing. An arc-shaped limiting groove is provided on the outer periphery of the first limiting roller 2, which matches the outer periphery of the fuse tube 11. The first limiting roller 2 is connected to the push rod 3 via a bearing, which reduces frictional damage between the fuse tube 11 and the limiting component and extends the service life of the fuse tube 11. The matching design of the arc-shaped limiting groove and the outer periphery of the fuse tube 11 increases the contact area between the two, improves the limiting stability, and can effectively resist lateral external forces, preventing the fuse tube 11 from accidentally shifting or falling.

[0025] In a preferred embodiment, the first limiting roller 2 is made of nylon. Nylon has good insulation properties, which can avoid the potential for electrical conductivity between the limiting component and the fuse tube 11 and ensure the safe operation of the equipment. At the same time, nylon is lightweight and wear-resistant, which can reduce the load on the transmission mechanism and extend the service life of the limiting roller, thus reducing the frequency of maintenance.

[0026] In a preferred embodiment, one end of the rotating shaft 4 is rotatably connected to the mounting bracket via a bearing. The bearing connection significantly reduces the rotational frictional resistance between the rotating shaft 4 and the mounting bracket, making the transmission mechanism operate more smoothly, avoiding jamming, and improving the timeliness of fault diagnosis. At the same time, the bearing can distribute the force on the rotating shaft 4, reduce wear, and extend the service life of the rotating shaft 4.

[0027] In a preferred embodiment, both push rod 3 and pressure rod 5 are welded to the rotating shaft 4. The weight of push rod 3 is greater than that of pressure rod 5 so that when the transmission mechanism is in the released state, push rod 3 rotates downward under the action of gravity, thereby causing the rotatable limiting component to fall and release the support of the fuse tube 11. The welding fixation enhances the connection strength between push rod 3, pressure rod 5 and rotating shaft 4, preventing loosening or falling off during operation and improving structural reliability. Utilizing the weight difference between push rod 3 and pressure rod 5, after locking and releasing, push rod 3 is automatically driven to rotate downward by gravity without additional power, simplifying the transmission structure and ensuring the speed and reliability of the breaking action.

[0028] In a preferred embodiment, the locking mechanism includes a guide sleeve 6, a push rod 7, and a drive mechanism. The guide sleeve 6 is fixedly connected to the mounting bracket and has a vertical guide hole. One end of the push rod 7 passes through the guide hole and abuts against the top surface of the pressure rod 5. The fixed end of the drive mechanism is fixedly connected to the mounting bracket, and the drive end of the drive mechanism is driven by the push rod 7 so that the push rod 7 abuts against the pressure rod 5, keeping the transmission structure in a locked state. The drive mechanism can also drive the push rod 7 to move upward and disengage from the pressure rod 5, switching the transmission structure to a released state. The vertical guide hole of the guide sleeve 6 provides a precise movement trajectory for the push rod 7, preventing the push rod 7 from deviating and causing locking failure or movement stagnation. The drive mechanism and the push rod 7 achieve active control of the locking and releasing states. Compared with a passive locking structure, the response is faster, and external commands can be used to intervene, improving the operational flexibility of the equipment.

[0029] In a preferred embodiment, the bottom end of the push rod 7 is provided with a second limiting roller. The second limiting roller is used to roll and connect with the top surface of the pressure rod 5. The second limiting roller converts the sliding friction between the push rod 7 and the pressure rod 5 into rolling friction, which greatly reduces the coefficient of friction between the two and reduces component wear. At the same time, the rolling connection makes the push rod 7 more smoothly contacting or disengaging from the pressure rod 5, avoiding action delay caused by excessive frictional resistance, and improving the accuracy of switching between locking and releasing states.

[0030] In a preferred embodiment, the driving mechanism is a drive motor. The drive motor responds to the fuse blowing signal of fuse 1 or an external control command. Upon receiving the fuse blowing signal, the drive motor drives the push rod 7 upward along the guide hole, causing the push rod 7 to disengage from the pressure rod 5. At this time, the transmission mechanism rotates around the rotating shaft 4 under the gravity of the push rod 3, and the rotatable limiting member falls downward with the push rod 3, releasing the support of the fuse tube 11. The fuse tube 11 falls under its own gravity to achieve circuit disconnection. When closing is required, the drive motor is reversed by external operation, driving the push rod... 7 moves downward and re-engages with the pressure rod 5, pushing the pressure rod 5 to rotate upward around the rotating shaft 4, thereby driving the push rod 3 and the rotatable limit component to reset upward, until the rotatable limit component re-lifts the fuse tube 11 and restores the locking mechanism to the locked state. The drive motor, as the drive mechanism, has a fast response speed and can act immediately after receiving the fuse signal, ensuring rapid isolation of the faulty circuit. It supports external control commands to realize the closing operation, eliminating the need for manual climbing for complex operations, thus improving the safety and efficiency of operation and maintenance. The design of motor reverse drive reset makes it more convenient to restore the equipment to operation and reduces the workload of operation and maintenance.

[0031] Example 2 This invention provides a method for using the limit-stop anti-misoperation drop-out fuse transmission structure as described in any of the above claims, characterized by comprising the following steps: I. Preparation Phase 1. Status check: Confirm that the mounting bracket is firmly fixed, the connection between the rotating shaft 4 in the transmission mechanism and the mounting bracket, push rod 3 and pressure rod 5 is not loose, the arc-shaped limiting groove of the first limiting roller 2 fits tightly with the outer periphery of the fuse tube 11, and the second limiting roller at the bottom end of the top rod 7 in the locking mechanism abuts normally with the top surface of the pressure rod 5.

[0032] 2. Electrical Start-up: Connect the drive motor power supply through the external control terminal and send the "lock confirmation" command. The drive motor drives the push rod 7 to press down along the vertical guide hole of the guide sleeve 6 to ensure that the pressure rod 5 is in a horizontal locking state. At this time, the transmission mechanism cannot rotate, and the first limit roller 2 stably supports the fuse tube 11, and the equipment enters the standby state.

[0033] II. Normal Operation Monitoring Phase 1. Real-time monitoring: Relying on the remote monitoring system to monitor the working status of the drive motor, ensuring that it maintains the locking drive force when there is no fuse signal. At the same time, regular on-site inspections are carried out to observe whether the first limit roller 2 is excessively worn due to operation, and whether the rolling contact between the second limit roller and the pressure rod 5 is smooth, so as to avoid the risk of jamming.

[0034] 2. Environmental adaptability: When encountering extreme weather such as strong winds and heavy rain, the monitoring system confirms that the locking mechanism has not triggered the release signal. The first limit roller 2 effectively limits the lateral movement of the fuse tube 11, preventing poor contact caused by the fuse tube 11 shaking due to external force.

[0035] III. Fault Response Phase 1. Automatic triggering: When a short circuit or overcurrent fault occurs in the distribution network, after the fuse in fuse 1 blows, the fuse signal is immediately transmitted to the drive motor of the drive mechanism. After receiving the signal, the motor starts the uplink drive program.

[0036] 2. Locking and releasing: The drive motor drives the push rod 7 to move upward along the guide hole of the guide sleeve 6. The second limit roller at the bottom end of the push rod 7 disengages from the top surface of the pressure rod 5, and the locking mechanism switches from the locked state to the released state, releasing the rotation restriction on the transmission mechanism.

[0037] 3. Disconnection action: Since the weight of push rod 3 is greater than that of pressure rod 5, the transmission mechanism rotates around the rotating shaft 4 under the action of gravity difference. Push rod 3 drives the first limit roller 2 at the end to fall down synchronously. After the fuse tube 11 loses support, it falls rapidly under its own gravity, realizing the isolation and disconnection of the fault circuit.

[0038] IV. Reset and Recovery Phase 1. Troubleshooting: After ensuring the safe isolation of the faulty circuit, maintenance personnel do not need to climb to approach the live parts. They can replace the blown fuse tube 11 using an insulated operating rod, ensuring that the specifications of the new fuse tube 11 match the requirements of the power distribution network.

[0039] 2. Mechanism Reset: A "reverse reset" command is sent to the drive motor via an external control terminal. The motor drives the push rod 7 to move downward. The second limit roller re-abuts against the top surface of the pressure rod 5 and pushes the pressure rod 5 to rotate upward around the shaft 4. This drives the push rod 3 and the first limit roller 2 to rise synchronously until the arc-shaped limit groove of the first limit roller 2 lifts the fuse tube 11 again.

[0040] 3. Locking Confirmation: After the reset is completed, the drive motor maintains the downward pressure of the push rod 7 to restore the locking mechanism to the locked state. A "run confirmation" signal is sent through the control terminal to ensure that the transmission mechanism cannot rotate freely and the equipment resumes normal power supply function.

[0041] Throughout the entire process, the signal response of the drive motor, the state switching of the locking mechanism, and the gravity drive of the transmission mechanism are all automated. Only the fuse replacement process requires manual intervention, which not only ensures the reliability of the disconnection but also improves the safety of operation and maintenance.

[0042] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A limit-stop and anti-misoperation transmission structure for a drop-out fuse, characterized in that: include: Install bracket, A transmission mechanism, rotatably mounted on the mounting bracket, wherein the first end of the transmission mechanism is provided with a rotatable limiting member for supporting and limiting the lateral displacement of the fuse tube (11) of the fuse (1); and A locking mechanism is movably connected to the transmission mechanism. The locking mechanism has a locked state and a released state. In the locked state, the locking mechanism restricts the rotation of the transmission mechanism to maintain the rotatable limiter's support of the fuse tube (11). In response to the fuse (1) fuse blowing signal, the locking mechanism switches to the released state. In the released state, the locking mechanism releases the restriction on the transmission mechanism to allow the rotatable limiter to fall and release the support of the fuse tube (11).

2. The limit-positioning and anti-misoperation drop-out fuse transmission structure according to claim 1, characterized in that: The transmission mechanism includes a rotating shaft (4), a push rod (3), and a pressure rod (5). The rotating shaft (4) is rotatably connected to the mounting bracket. One end of the push rod (3) is fixedly connected to the rotating shaft (4). The rotatable limiting member is provided at the other end of the push rod (3). One end of the pressure rod (5) is fixedly connected to the rotating shaft (4), and the pressure rod (5) is movably connected to the locking mechanism.

3. The limit-position anti-misoperation drop-out fuse transmission structure according to claim 2, characterized in that: The rotatable limiting component is a first limiting roller (2) fitted on the end of the push rod (3). The first limiting roller (2) is rotatably connected to the push rod (3) through a bearing. An arc-shaped limiting groove is provided on the outer periphery of the first limiting roller (2), and the arc-shaped limiting groove matches the outer periphery of the fuse tube (11).

4. The limit-positioning and anti-misoperation drop-out fuse transmission structure according to claim 3, characterized in that: The first limiting roller (2) is made of nylon.

5. The limit-stop anti-misoperation drop-out fuse transmission structure according to claim 4, characterized in that: One end of the rotating shaft (4) is rotatably connected to the mounting bracket via a bearing.

6. The limit-position anti-misoperation drop-out fuse transmission structure according to claim 5, characterized in that: Both the push rod (3) and the pressure rod (5) are welded and fixed to the rotating shaft (4), and the weight of the push rod (3) is greater than the weight of the pressure rod (5) so that when the transmission mechanism is in the released state, the push rod (3) rotates downward under the action of gravity, thereby causing the rotatable limiting member to fall and release the support of the fuse tube (11).

7. The limit-position anti-misoperation drop-out fuse transmission structure according to claim 2, characterized in that: The locking mechanism includes a guide sleeve (6), a push rod (7), and a driving mechanism. The guide sleeve (6) is fixedly connected to the mounting bracket. The guide sleeve (6) is provided with a vertical guide hole. One end of the push rod (7) passes through the guide hole and abuts against the top surface of the pressure rod (5). The fixed end of the driving mechanism is fixedly connected to the mounting bracket. The driving end of the driving mechanism is connected to the push rod (7) so that the push rod (7) abuts against the pressure rod (5) to keep the transmission structure locked. It can also drive the push rod (7) to move upward and disengage from the pressure rod (5) to switch the transmission structure to the release state.

8. The limit-positioning anti-misoperation drop-out fuse transmission structure according to claim 7, characterized in that: The bottom end of the top rod (7) is provided with a second limiting roller, which is used to roll and connect with the top surface of the pressure rod (5).

9. The limit-position anti-misoperation drop-out fuse transmission structure according to claim 8, characterized in that: The driving mechanism is a drive motor. The drive motor responds to the fuse blowing signal of the fuse (1) or external control command. When the fuse blowing signal is received, the drive motor drives the push rod (7) to move upward along the guide hole, so that the push rod (7) and the pressure rod (5) are disengaged. At this time, the transmission mechanism rotates around the rotating shaft (4) under the gravity of the push rod (3). The rotatable limiter falls down with the push rod (3), releasing the support of the fuse tube (11). The fuse tube (11) falls under its own gravity to realize the circuit disconnection. When it is necessary to close the circuit, the drive motor is reversed by external operation, which drives the push rod (7) to move downward and re-abut against the pressure rod (5), pushing the pressure rod (5) to rotate upward around the rotating shaft (4), thereby driving the push rod (3) and the rotatable limiter to reset upward until the rotatable limiter re-supports the fuse tube (11) and the locking mechanism returns to the locked state.

10. A method of using a limit-stop anti-misoperation drop-out fuse transmission structure as described in any one of claims 1 to 9, characterized in that: Includes the following steps: In the locked state, the transmission mechanism is restricted from rotating by the locking mechanism so that the rotatable limiting member lifts and restricts the fuse tube (11) of the fuse (1). In response to the fuse blowing signal of the fuse (1), the locking mechanism is controlled to switch to the release state; In the released state, the transmission mechanism rotates and drives the rotatable limiting member to fall, thereby releasing the support of the fuse tube (11) and causing the fuse tube (11) to fall to achieve circuit disconnection. When it is necessary to close the circuit, the locking mechanism is controlled to return to the locked state, and the transmission mechanism is driven to rotate in the opposite direction so that the rotatable limiter can lift the fuse tube (11) again.

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