Near-end protection device and method for three-phase synchronous drop-out fuse

Abstract

The invention relates to the technical field of fuses, and discloses a three-phase synchronous drop-out fuse near-end protection device and method.The three-phase synchronous drop-out fuse near-end protection device comprises an insulator, a mounting plate is arranged on the outer wall of the insulator, a sheath is fixedly arranged on the outer wall of the mounting plate, and a supporting frame is arranged at the bottom end of the mounting plate; the middle of the supporting frame is arranged on the outer wall of the insulator, a movable groove is formed in the upper surface of the supporting frame, rubber baffles are symmetrically arranged at one end of the supporting frame, and an upper wiring terminal is arranged on the outer wall of the upper end of the insulator. Through linkage cooperation of all the components, the closing fixing effect is achieved, the clamping block can firmly clamp the fuse tube, the position stability of the fuse tube is ensured, the electrical connection stability and the normal conduction of a circuit are guaranteed, meanwhile, good mechanical structure collaboration is shown, all the components act coherently and orderly, the service life of the device is prolonged, and the operation risk is reduced. The problem that the fuse tube is unstable in fixation after being switched on is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuses, and in particular to a three-phase synchronous drop-out fuse proximal protection device and method. Background Art

[0002] Drop-out fuses are widely used in power distribution networks. As a core component, the fuse tube is crucially secure after closing. Traditional drop-out fuses have shortcomings, as their structure lacks effective protection for securing the fuse tube after closing. On the one hand, they often rely on simple slots or unidirectional limiters to secure the fuse tube. This can be easily affected by wind, vibration, and other external factors, causing the fuse tube to loosen and shift. This can lead to unstable electrical connections with the terminals, increased contact resistance, overheating, sparking, and other problems, affecting current conduction, accelerating component aging, and even threatening distribution network safety. On the other hand, after frequent opening and closing operations, the fuse tube struggles to return to its initial stable position due to the lack of a reliable reset and securing mechanism, resulting in poor securing. As power systems demand increased reliability, the issue of unstable fuse tube retention in traditional fuses after closing has become increasingly prominent, necessitating improved protective devices to address this issue. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a three-phase synchronous drop-out fuse proximal protection device and method, which solves the problem of unstable fixation of the fuse tube after closing.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a three-phase synchronous drop-out type fuse proximal protection device, comprising an insulator, the outer wall of the insulator is provided with a mounting plate, the outer wall of the mounting plate is fixedly provided with a sheath, the bottom end of the mounting plate is provided with a support frame, the middle part of the support frame is provided on the outer wall of the insulator, the upper surface of the support frame is provided with a movable groove, one end of the support frame is symmetrically provided with a rubber baffle, the upper outer wall of the insulator is provided with an upper wiring terminal, the lower outer wall of the insulator is provided with a lower wiring terminal, the top outer wall of the insulator is provided with a connecting plate, one end of the connecting plate is provided with a trapezoidal piece, the upper surface of the connecting plate is provided with a clamping mechanism, the bottom end of the insulator is provided with a rotating mechanism, the top of the insulator is provided with a protective mechanism, the bottom end of the clamping mechanism is provided with a fuse mechanism, and the bottom end of the fuse mechanism is provided on one side of the rotating mechanism.

[0005] By adopting the above technical solutions, the mechanical structure can be stably installed, accurately positioned, and the various mechanisms can work together reliably. The electrical performance can ensure stable connection and timely and effective fault response. The protection performance can not only resist environmental interference but also reduce the risk of accidental damage, thereby ensuring long-term and reliable operation of the device in complex outdoor environments and improving the overall safety and stability of the circuit.

[0006] Preferably, the clamping mechanism includes a push rod, the outer wall of the push rod is provided with a fixed block 1 through the connecting plate, the bottom end of the push rod is provided on the upper surface of the trapezoidal piece, the interior of the fixed block 1 is symmetrically provided with a rotating shaft 4, the outer wall of the rotating shaft 4 is provided with an N-shaped arm, the outer wall of the N-shaped arm is provided with a slide groove, one end of the N-shaped arm is provided with a clamping block, one side of the clamping block is provided on the outer wall of the fuse mechanism, the inside of the slide groove of the N-shaped arm is symmetrically slidably connected with a connecting rod through rotating shaft 6, one end of the connecting rod is rotatably connected to the fixed block 2 through rotating shaft 7, the bottom end of the fixed block 2 is provided on the upper surface of the connecting plate, the lower surface of the connecting plate is provided with a spring, and one end of the spring is provided on the upper surface of the trapezoidal piece.

[0007] Preferably, the clamping mechanism also includes two L-shaped plates, one end of the L-shaped plate is arranged on one side of the trapezoidal piece, one side of the L-shaped plate is provided with spring 2, one end of the spring 2 is provided with a movable rod, the upper surface of the movable rod is provided with a rotating shaft 5, the outer wall of the rotating shaft 5 is provided with a fixed block 3, one end of the fixed block 3 is provided on one side of the trapezoidal piece, and one end of the movable rod is provided with an arc plate.

[0008] Preferably, a baffle is fixedly provided on the lower surface of the trapezoidal piece, a connecting buckle is symmetrically provided on one side of the baffle, and a buckle hook is provided at one end of the connecting buckle.

[0009] Preferably, the rotating mechanism includes a contact frame, one end of the contact frame is arranged at the bottom end of the outer wall of the insulator, a rotating groove is provided in the middle of the contact frame, a rotating shaft three is provided in the rotating groove of the contact frame, a fixing frame is symmetrically provided on the outer wall of the rotating shaft three, a rotating shaft two is provided on one side of the fixing frame, and a stop block is provided on the outer wall of the rotating shaft two.

[0010] Preferably, a torsion spring is provided between the stopper and the second rotating shaft, one end of the stopper is provided at the bottom end of the fuse tube, a first rotating shaft is provided on the other side of the fixing frame, a fixing plate is provided on the outer wall of the first rotating shaft, and one end of the fixing plate is provided at the bottom end of the outer wall of the fuse tube.

[0011] Preferably, the protective mechanism includes a fixing rod, a waterproof plate is provided at the top end of the fixing rod, slopes are provided on both sides of the waterproof plate, a support plate is provided on the upper surface of the waterproof plate, and one end of the support plate is provided on the outer wall of the fixing rod.

[0012] Preferably, the fuse mechanism includes a plug, the top end of which is arranged on the lower surface of the trapezoidal piece, and the bottom end of which is arranged on the top end of the fuse tube.

[0013] Preferably, the outer wall of the fuse tube is provided with a ring sleeve, the outer wall of the ring sleeve is provided with an operating ring, and the outer wall of the fuse tube is provided on one end of the fixing plate and the stopper through the movable groove of the support frame.

[0014] A method for using a three-phase synchronous drop-out type fuse proximal end protection device, used for the three-phase synchronous drop-out type fuse proximal end protection device, comprising the following steps:

[0015] S1. Check the integrity of each mechanism component, align the device with the line through the insulator terminal, and fix it to the pole with the connecting plate and support frame to ensure it is firmly installed;

[0016] S2. Align the top of the fuse tube with the trapezoidal piece, insert it into the rotating mechanism along the movable groove, and the top of the fuse tube is linked with the clamping mechanism to clamp the fuse tube. At the same time, confirm that the protection mechanism functions normally.

[0017] S3. Use an operating tool to push the fuse tube upward. The rotating mechanism block flips and the torsion spring stores energy. The fuse tube engages with the upper terminal clamping mechanism. The rotating mechanism resets and locks. Test the terminal continuity to confirm that the circuit is energized.

[0018] S4. Pull the operating ring to pull down the fuse tube. The rotating mechanism block is unlocked, the fuse tube swings down, and the clamping mechanism is released. In case of a fault, the fuse blows and the fuse tube automatically drops down. After opening the circuit breaker, check the fuse tube drop status, block reset, and circuit insulation.

[0019] S5. Clean the insulators and sheaths regularly, check the appearance of the fuse tube, verify the spring elasticity of the clamping mechanism and the flexibility of the components, and replace damaged protective parts; replace the fuse tube after disconnecting the switch and grounding, and re-install it for debugging to ensure reliable fault response.

[0020] The present invention provides a three-phase synchronous drop-out fuse proximal protection device and method. It has the following beneficial effects:

[0021] 1. This invention achieves a closed and fixed effect through the coordinated coordination of various components. This allows the clamp to firmly clamp the fuse tube, ensuring its stable position, stable electrical connection, and normal circuit conduction. It also exhibits good mechanical structure coordination, ensuring coherent and orderly operation of various components, which helps to extend the service life of the device and reduce operational risks. This solves the problem of unstable fixation of the fuse tube after closing.

[0022] 2. This invention achieves rigid transmission and precise movement through the fixed connection between the fixed frame and the rotating shaft in the rotating mechanism, shortening the opening action time and improving operation reliability. Its bidirectional positioning structure ensures the stability of the fuse tube during closing, effectively resisting external interference and maintaining stable electrical contact resistance. The self-reset function simplifies the closing operation process and improves operation and maintenance efficiency. It solves the action delay problem existing in traditional articulated structures.

[0023] 3. Through the sloped design of the protective mechanism's waterproof plate and the reinforced support of the support plate, this invention achieves effective waterproofing and drainage, reliable wind and dust protection, and excellent resistance to foreign object impact. This reduces the probability of electrical failure, improves operational reliability and service life, and reduces the frequency of repairs and component replacements due to unexpected situations. This solves the problem of poor waterproofing of electrical components and the impact of dust and debris on device performance.

[0024] 4. The present invention achieves stable circuit continuity through the coordinated cooperation of various components of the fuse mechanism, preventing circuit operation from being affected by abnormalities such as poor contact. It also offers convenient operation, allowing operators to easily complete related operations through the operating ring. It also has efficient fault isolation capabilities, which can quickly disconnect the faulty circuit when the fuse blows, protecting the power distribution system. This solves the problem of unstable fuse tube position affecting electrical connection and inconvenient operation.

[0025] 5. The present invention enhances the clamping stability of the fuse mechanism by coordinating multiple components of the clamping mechanism, forming a multi-directional clamping system with flexible and adaptive capabilities to cope with changes in the fuse mechanism's state. It also improves operation and maintenance convenience, reduces operational difficulty and workload, and solves the problem of insufficient unidirectional clamping that can easily cause the fuse mechanism to shake and move. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front perspective diagram of a three-phase synchronous drop-out fuse proximal protection device proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the partial structure of the rubber baffle of the proximal protection device of a three-phase synchronous drop-out fuse proposed by the present invention;

[0028] Figure 3 This is a partial structural diagram of a fixing block of a proximal protection device of a three-phase synchronous drop-out fuse proposed by the present invention;

[0029] Figure 4 This is a schematic diagram of the partial structure of the contact frame of the proximal protection device of a three-phase synchronous drop-out fuse proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the partial structure of the N-shaped arm of the proximal protection device of a three-phase synchronous drop-out fuse proposed by the present invention;

[0031] Figure 6 This is a schematic diagram of the partial structure of the sheath of the proximal protection device of a three-phase synchronous drop-out fuse proposed by the present invention;

[0032] Figure 7 This is a schematic diagram of the partial structure of the fuse tube of a proximal protection device of a three-phase synchronous drop-out fuse proposed by the present invention;

[0033] Figure 8 This is a schematic diagram of the partial structure of the spring of the proximal protection device of a three-phase synchronous drop-out fuse proposed by the present invention;

[0034] Figure 9 This is a partial structural cross-sectional view of the connection plate of a proximal protection device of a three-phase synchronous drop-out fuse proposed by the present invention;

[0035] Figure 10 This is a flow chart of the method for using a three-phase synchronous drop-out fuse proximal protection device proposed by the present invention.

[0036] Among them, 1. insulator; 2. sheath; 3. mounting plate; 4. support frame; 5. contact frame; 6. rubber baffle; 7. fuse tube; 8. ring sleeve; 9. operating ring; 10. waterproof plate; 11. fixing rod; 12. trapezoidal piece; 13. connecting plate; 14. N-shaped arm; 15. connecting rod; 16. slide groove; 17. fixing block 1; 18. ejector rod; 19. spring; 20. ejector head; 21. fixing plate; 22. rotating shaft 1; 23. fixing frame; 24. block; 25. rotating shaft 2; 26. rotating groove; 27. rotating shaft 3; 28. clamping block; 29. ​​fixing block 2; 30. rotating shaft 4; 31. baffle; 32. connecting buckle; 33. support plate; 34. L-shaped plate; 35. spring 2; 36. fixing block 3; 37. rotating shaft 5; 38. arc plate; 39. movable rod. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] Example 1:

[0039] Please see the attached Figure 1 -Attached Figure 5An embodiment of the present invention provides a proximal protection device for a three-phase synchronous drop-out fuse, comprising an insulator 1, a mounting plate 3 being provided on the outer wall of the insulator 1, a sheath 2 being fixedly provided on the outer wall of the mounting plate 3, a support frame 4 being provided at the bottom end of the mounting plate 3, the middle part of the support frame 4 being provided on the outer wall of the insulator 1, a movable groove being provided on the upper surface of the support frame 4, a rubber baffle 6 being symmetrically provided at one end of the support frame 4, an upper wiring terminal being provided on the upper outer wall of the insulator 1, a lower wiring terminal being provided on the lower outer wall of the insulator 1, a connecting plate 13 being provided on the top outer wall of the insulator 1, a trapezoidal piece 12 being provided at one end of the connecting plate 13, a clamping mechanism being provided on the upper surface of the connecting plate 13, a rotating mechanism being provided at the bottom end of the insulator 1, a protective mechanism being provided at the top end of the insulator 1, a fuse mechanism being provided at the bottom end of the clamping mechanism, and the bottom end of the fuse mechanism being provided on one side of the rotating mechanism.

[0040] Insulator 1 serves as the device's foundational support component, its tilted structure providing a mounting base for various components. Mounting plate 3, secured to the outer wall of insulator 1, supports components such as sheath 2 and support frame 4. Sheath 2 protects mounting plate 3 and surrounding electrical connections, preventing external factors from affecting the device's normal operation. Support frame 4 achieves self-positioning by cooperating with the outer wall of insulator 1 at its center. A movable groove on its upper surface provides space for the fuse mechanism to move. A rubber baffle 6 at one end limits the fuse mechanism's position during operation, preventing it from swinging excessively.

[0041] Through the coordinated cooperation of various mechanical components, stable clamping and positioning of the fuse mechanism during installation and precise falling action during opening are achieved.

[0042] The clamping mechanism includes a push rod 18, the outer wall of the push rod 18 is provided with a fixed block 17 through the connecting plate 13, the bottom end of the push rod 18 is provided on the upper surface of the trapezoidal piece 12, and the interior of the fixed block 17 is symmetrically provided with a rotating shaft 4 30, the outer wall of the rotating shaft 4 30 is provided with an N-shaped arm 14, the outer wall of the N-shaped arm 14 is provided with a slide groove 16, one end of the N-shaped arm 14 is provided with a clamping block 28, one side of the clamping block 28 is provided on the outer wall of the fuse mechanism, the inside of the slide groove 16 of the N-shaped arm 14 is symmetrically slidably connected with a connecting rod 15 through a rotating shaft 6, one end of the connecting rod 15 is rotatably connected to a fixed block 29 through a rotating shaft 7, the bottom end of the fixed block 29 is provided on the upper surface of the connecting plate 13, and a spring 19 is provided on the lower surface of the connecting plate 13, and one end of the spring 19 is provided on the upper surface of the trapezoidal piece 12.

[0043] In the initial state, the spring 19 is in a certain extended state, with one end connected to the lower surface of the connecting plate 13 and the other end abutting the upper surface of the trapezoidal piece 12, thereby exerting a certain elastic force on the trapezoidal piece 12. The top rod 18 passes through the connecting plate 13 and its bottom end is located on the upper surface of the trapezoidal piece 12. The fixed block 17 is fixedly connected to the top rod 18 and is in a corresponding position. The N-shaped arm 14 is rotatably mounted by the rotating shaft 4 30 symmetrically arranged inside the fixed block 17. The slide groove 16 of the N-shaped arm 14 is symmetrically slidably connected to the connecting rod 15 via the rotating shaft 6. One end of the connecting rod 15 is rotatably connected to the fixed block 2 29 via the rotating shaft 7. The fixed block 29 is firmly set on the upper surface of the connecting plate 13. This connection relationship between the various components constitutes the static structural foundation of the entire clamping mechanism.

[0044] During the closing operation, the plug 20 on the fuse tube 7 interacts with the trapezoidal piece 12, pushing the piece 12 upward. As the piece 12 rises, the extended spring 19 located on its upper surface gradually compresses, beginning to store elastic potential energy. Simultaneously, the push rod 18 moves upward in tandem with the rising piece 12. Because the push rod 18 is fixedly connected to the fixed block 17, the fixed block 17 also moves upward with the push rod 18. The upward movement of the fixed block 17 acts on the N-shaped arm 14, causing it to rotate about the internal shaft 30. During the rotation of the N-shaped arm 14, the connecting rod 15, connected to the outer wall slot 16 via the rotating shaft 6, will slide relatively within the slot 16 and rotate around the rotating shaft 7 connected to the fixed block 29. The N-shaped arm 14 is able to complete its rotation thanks to the coordinated cooperation of the fixed block 29, the connecting rod 15, and the structure of the N-shaped arm 14 itself. The clamping block 28 at one end of the N-shaped arm 14 gradually approaches the outer wall of the fuse tube 7 as the N-shaped arm 14 rotates, ultimately clamping the fuse tube 7 and securing it. This ensures that the fuse tube 7 remains stable in its corresponding position during normal operation after closing the circuit, thus ensuring reliable circuit conduction and stable operation of the entire device.

[0045] Through the orderly linkage between the various components, a reliable closing and fixing effect is achieved. The clamping block 28 firmly clamps the fuse tube 7, ensuring its stable position, stable electrical connection, and normal circuit conduction. At the same time, it demonstrates good mechanical structure coordination, making the various components operate coherently and orderly, which helps to extend the service life of the device and reduce operational risks. This solves the problem of unstable fixation of the fuse tube 7 after closing.

[0046] A baffle 31 is fixedly provided on the lower surface of the trapezoidal piece 12 , a connecting buckle 32 is symmetrically provided on one side of the baffle 31 , and a buckle hook is provided at one end of the connecting buckle 32 .

[0047] A baffle 31 is fixedly mounted on the lower surface of the trapezoidal piece 12. This baffle 31 is positioned in a specific position and performs a corresponding function. A connecting buckle 32 is symmetrically positioned on one side of the baffle 31, with one end equipped with a hook structure. This symmetrical arrangement provides a relatively balanced connection and fixation from both sides during use, ensuring uniform force distribution and avoiding component misalignment due to unilateral force. The hook is designed to facilitate snap-fit ​​connection with other corresponding components. Its shape and size are compatible with the connection point of the target component to achieve a stable and reliable connection.

[0048] The connecting buckle 32, with its hook structure and secure connection to the baffle 31, establishes a reliable connection between the device and other related components. Whether in a static installation or during operation, when subjected to vibration or slight movement, it effectively prevents the connected components from loosening or falling off, ensuring the relative position of the components remains stable, thereby maintaining the integrity of the entire device and the reliability of its coordinated operation.

[0049] The rotating mechanism includes a contact frame 5, one end of which is arranged at the bottom end of the outer wall of the insulator 1, a rotating groove 26 is arranged in the middle of the contact frame 5, a rotating shaft three 27 is arranged in the rotating groove 26 of the contact frame 5, and a fixing frame 23 is symmetrically arranged on the outer wall of the rotating shaft three 27, a rotating shaft two 25 is arranged on one side of the fixing frame 23, a stopper 24 is arranged on the outer wall of the rotating shaft two 25, a torsion spring is arranged between the stopper 24 and the rotating shaft two 25, one end of the stopper 24 is arranged at the bottom end of the fuse tube 7, and a rotating shaft one 22 is arranged on the other side of the fixing frame 23, a fixing plate 21 is arranged on the outer wall of the rotating shaft one 22, and one end of the fixing plate 21 is arranged at the bottom end of the outer wall of the fuse tube 7.

[0050] The rotating mechanism is based on the contact frame 5 as a supporting component, one end of which is fixed to the bottom end of the outer wall of the insulator 1. A rotating shaft 3 27 is provided in the rotating groove 26 in the middle of the contact frame 5. The fixed frame 23 is fixedly connected to the rotating shaft 3 27, so that the fixed frame 23 can rotate synchronously around the rotating shaft 3 27. A stopper 24 is installed on one side of the fixed frame 23 through the rotating shaft 25. A torsion spring is provided between the stopper 24 and the rotating shaft 25. In the initial state, the elastic force of the torsion spring causes one end of the stopper 24 to tightly abut the bottom end of the fuse tube 7, forming a limiting constraint. A fixing plate 21 is provided on the other side of the fixed frame 23 through the rotating shaft 1 22. One end of the fixing plate 21 is in contact with the bottom end of the outer wall of the fuse tube 7, and together with the stopper 24, it forms a two-way positioning structure for the fuse tube 7, ensuring that the fuse tube 7 maintains a stable electrical connection position when the switch is closed.

[0051] When an overload or short-circuit fault occurs in the circuit, causing the fuse to blow, the fuse tube 7 loses its axial tension and, under the action of its own gravity and the electric force generated by the fault current, applies a downward torque to the block 24. When this torque exceeds the preload of the torsion spring, the block 24 rotates counterclockwise around the second shaft 25, releasing the limit on the fuse tube 7. Because the fixed frame 23 is fixedly connected to the third shaft 27, the gravitational torque of the fuse tube 7 is transmitted to the fixed frame 23 through the fixed plate 21, driving the fixed frame 23 to rotate as a whole around the third shaft 27, causing the fuse tube 7 to fall along the preset trajectory to the tripping position, thereby disconnecting the circuit. During this process, the fixed connection between the fixed frame 23 and the third shaft 27 ensures the rigidity of the torque transmission, avoiding movement delays or jamming caused by relative sliding.

[0052] When manually closing the fuse, the fuse tube 7 is pushed upward. The inclined surface at the bottom of the fuse tube 7 pushes the stopper 24 to overcome the resistance of the torsion spring and rotate clockwise until the stopper 24 resets under the action of the spring and re-engages the bottom of the fuse tube 7. At the same time, the fixing plate 21 rotates synchronously with the fixing frame 23 about the rotating shaft 3 27 to the closed position, and cooperates with the stopper 24 to lock the fuse tube 7 in the closed state, completing the dual reset of the mechanical and electrical connections.

[0053] The fixed connection between the fixed frame 23 and the rotating shaft 3 27 in the rotating mechanism achieves rigid transmission and precise movement, shortening the opening action time and improving operation reliability. Its bidirectional positioning structure ensures the stability of the fuse tube 7 when closing, effectively resisting external interference and maintaining stable electrical contact resistance. The self-reset function simplifies the closing operation process and improves operation and maintenance efficiency. This solves the problem of action delay existing in traditional articulated structures.

[0054] The protection mechanism includes a fixing rod 11 , a waterproof plate 10 is provided at the top of the fixing rod 11 , slopes are provided on both sides of the waterproof plate 10 , a support plate 33 is provided on the upper surface of the waterproof plate 10 , and one end of the support plate 33 is provided on the outer wall of the fixing rod 11 .

[0055] The protective mechanism utilizes a fixed rod 11 as its primary support structure, one end of which is fixed to the corresponding base component of the device, providing a stable support point for the entire protective mechanism. A waterproofing plate 10 is mounted on top of the fixed rod 11. This plate is shaped specifically with slopes on either side. This slope serves as a clear drainage guide. When rain, dew, or other liquids fall onto the plate 10, they naturally slide down the slopes to the sides, preventing accumulation on the upper surface of the plate 10.

[0056] A support plate 33 is also provided on the upper surface of the waterproof sheet 10, one end of which is connected to the outer wall of the fixing rod 11. The function of the support plate 33 is to provide additional support for the waterproof sheet 10, enhance the structural stability of the waterproof sheet 10 in the face of various external forces, prevent deformation and displacement of the waterproof sheet 10 due to external forces, and ensure that the waterproof sheet 10 always maintains a good covering and protection state.

[0057] The sloped design of the protective mechanism's waterproof plate 10 and the reinforced support of the support plate 33 achieve effective waterproofing and drainage, reliable wind and dust protection, and excellent resistance to foreign object impact. This reduces the probability of electrical failure, improves operational reliability and service life, and reduces the frequency of repairs and component replacements due to unexpected situations. This solves the problem of poor waterproofing of electrical components and the impact of dust and debris on device performance.

[0058] The fuse mechanism includes a plug 20, the top end of the plug 20 is arranged on the lower surface of the trapezoidal piece 12, the bottom end of the plug 20 is arranged on the top end of the fuse tube 7, the outer wall of the fuse tube 7 is provided with a ring sleeve 8, the outer wall of the ring sleeve 8 is provided with an operating ring 9, and the outer wall of the fuse tube 7 is provided at one end of the fixed plate 21 and the stopper 24 through the movable groove of the support frame 4.

[0059] The fuse mechanism primarily consists of a plug 20, a fuse tube 7, a collar 8, and an operating ring 9. The plug 20 serves as a connecting hub, its top tightly fitting against the lower surface of the trapezoidal piece 12, mechanically connecting the fuse mechanism to the structure above. Its bottom is securely attached to the top of the fuse tube 7, connecting it to the associated structure above and ensuring force transmission and overall structural continuity.

[0060] The fuse inside the fuse tube 7 conducts current in the circuit and, in the event of a fault, melts to interrupt the circuit. A collar 8 is provided on the outer wall of the fuse tube 7. The outer diameter of the collar 8 matches the outer diameter of the fuse tube 7, and the combination of the two ensures that the collar 8 can be stably placed on the fuse tube 7. An operating ring 9 is provided on the outer wall of the collar 8. This operating ring 9 is a component that facilitates manual operation by the operator. Its shape and size conform to ergonomic principles, making it easy to grasp and apply force to operate the fuse tube 7.

[0061] During normal operation of the device, current passes through the fuse inside the fuse tube 7, achieving circuit conduction. At this time, the fuse tube 7 remains fixed in position under the combined action of the top head 20, the fixing plate 21, and the stopper 24, preventing any shaking or displacement. The top head 20 transmits the supporting force from the upper structure, balancing the gravity of the fuse tube 7 below and the forces of other components; the fixing plate 21 supports the outer wall of the fuse tube 7 from one side, helping to maintain its radial position stability; the stopper 24 limits the fuse tube 7 at one end to prevent it from accidentally moving axially, ensuring that the fuse inside the fuse tube 7 maintains a good electrical connection with other connection points in the circuit, allowing the entire circuit to operate stably and reliably.

[0062] When a tripping operation is required, the operator can apply external force to the fuse tube 7 by grasping the operating ring 9. If it is a normal power outage operation, the operator pulls down the operating ring 9, driving the fuse tube 7 to move downward along the movable groove of the support frame 4. During the movement, the bottom end of the fuse tube 7 will gradually break away from the limit of the block 24, and the fuse tube 7 as a whole will rotate around the contact point with other components under the action of its own gravity and external force, eventually causing the fuse tube 7 to fall, thereby disconnecting the circuit.

[0063] The coordinated operation of the various components of the fuse mechanism ensures stable circuit continuity, preventing circuit operation from being affected by abnormalities such as poor contact. The device offers convenient operation, allowing operators to easily complete related operations through the operating ring 9. It also has efficient fault isolation capabilities, quickly disconnecting the faulty circuit when the fuse blows, protecting the power distribution system. This solves the problem of unstable position of the fuse tube 7 affecting electrical connection and inconvenient operation.

[0064] Example 2:

[0065] Please see the attached Figure 6 With attached Figure 9 Based on the above embodiment, this embodiment is used to solve the problem that insufficient clamping in one direction easily causes the fuse mechanism to shake and displace, which is achieved through the following solution.

[0066] The clamping mechanism also includes two L-shaped plates 34, one end of the L-shaped plate 34 is arranged on one side of the trapezoidal piece 12, a spring 2 35 is provided on one side of the L-shaped plate 34, one end of the spring 2 35 is provided with a movable rod 39, the upper surface of the movable rod 39 is provided with a rotating shaft 5 37, the outer wall of the rotating shaft 5 37 is provided with a fixed block 36, one end of the fixed block 36 is provided on one side of the trapezoidal piece 12, and one end of the movable rod 39 is provided with an arc plate 38.

[0067] One end of L-shaped plate 34 is fixedly arranged on one side of trapezoidal sheet 12 in the clamping mechanism, forming a stable installation foundation. Be connected with spring 2 35 on one side of L-shaped plate 34, spring 2 35 is in certain initial stretching state, and one end of it is connected with movable rod 39.

[0068] A fifth rotating shaft 37 is provided on the upper surface of movable rod 39. A third fixing block 36 is mounted on the outer wall of fifth rotating shaft 37. One end of fixing block 36 is fixed to one side of trapezoidal piece 12, enabling movable rod 39 to rotate a certain angle about fifth rotating shaft 37. A curved plate 38 is provided at one end of movable rod 39. Its shape matches the outer wall contour of the fuse mechanism, ensuring a close contact with the fuse mechanism.

[0069] In the initial state, the elastic force of spring 2 35 acts on the movable rod 39, so that the movable rod 39 is in a relatively stable angular position through the cooperation of rotating shaft 5 37 and fixed block 3 36. The arc plate 38 and the fuse mechanism maintain a certain initial relative position relationship. The entire structure is in a balanced state, ready for subsequent action response.

[0070] When the fuse mechanism is installed in place and the fuse tube 7 is in the corresponding position, the outer wall of the fuse mechanism will come into contact with the movable rod 39. Due to the squeezing effect of the fuse mechanism, an external force will be applied to the movable rod 39, causing the movable rod 39 to rotate around the rotating shaft 5 37. During the rotation of the movable rod 39, the spring 2 35 will be compressed.

[0071] As the movable rod 39 rotates, the arc plate 38 will fit more closely against the outer wall of the fuse mechanism. The friction generated by this fit and the elastic force of the spring 2 35 work together to apply an auxiliary clamping force from the side direction of the fuse mechanism to ensure that the fuse mechanism will not experience lateral displacement or shaking during normal operation.

[0072] When the fuse mechanism is activated due to certain circumstances, the external force applied by the fuse mechanism to the movable rod 39 changes. When the fuse tube 7 falls, the squeezing force on the movable rod 39 decreases. At this time, the elastic restoring force of the second spring 35 comes into play, pushing the movable rod 39 to rotate in the opposite direction, causing the curved plate 38 to gradually loosen its contact with the fuse mechanism, allowing the fuse mechanism to smoothly perform the corresponding action according to the subsequent set mechanism.

[0073] The coordination of multiple components in the clamping mechanism enhances the fuse mechanism's clamping stability, forming a multi-directional clamping system with flexible and adaptive capabilities to respond to changes in the fuse mechanism's state. This also improves operational convenience and reduces operational difficulty and workload. This solves the problem of insufficient unidirectional clamping, which can easily cause the fuse mechanism to shake and move.

[0074] Example 3:

[0075] Please see the attached Figure 10 Based on the above embodiment, this embodiment is used to solve the problems that may affect the reliable operation of the device due to components, operations, protection and other links during the entire process of installation, operation and maintenance, and is achieved through the following solution.

[0076] A method for using a three-phase synchronous drop-out type fuse proximal end protection device, used for a three-phase synchronous drop-out type fuse proximal end protection device, comprising the following steps:

[0077] S1. Check the integrity of each mechanism component, align the device with the line through the insulator 1 terminal, and fix it to the pole using the connecting plate 13 and the support frame 4 to ensure a secure installation;

[0078] S2. Align the top head 20 of the fuse tube 7 with the trapezoidal piece 12 and insert it into the rotating mechanism along the movable groove. The top head 20 will work with the clamping mechanism to clamp the fuse tube 7. Simultaneously confirm that the protection mechanism functions normally.

[0079] S3. Use an operating tool to push the fuse tube 7 upward, flip the rotating mechanism block 24, and store energy in the torsion spring. The fuse tube 7 engages with the upper terminal clamping mechanism, and the rotating mechanism resets and locks. Test the terminal continuity to confirm that the circuit is energized.

[0080] S4. Pull the operating ring 9 to pull down the fuse tube 7. The rotating mechanism stopper 24 is unlocked, and the fuse tube 7 swings down and falls. The clamping mechanism is released. In case of a fault, the fuse blows and automatically triggers the drop. After opening the circuit, check the drop status of the fuse tube 7, the reset of the stopper 24, and the circuit insulation.

[0081] S5. Clean the insulator 1 and sheath 2 regularly, check the appearance of the fuse tube 7, verify the elasticity of the clamping mechanism spring 19 and the flexibility of the components, and replace damaged protective parts; replace the fuse tube 7 after opening and grounding, and re-install and debug it to ensure reliable fault response.

[0082] First, check the integrity of all components before installing the device on the pole, laying the foundation for subsequent operation. Next, align the fuse tube 7 with the relevant components and insert it into the rotating mechanism. The clamping mechanism is then tightened and the protection is confirmed to be functioning properly. Then, using a tool, push the fuse tube 7, causing the rotating mechanism to activate and close the circuit breaker. Conductivity is tested to ensure power is flowing. Pulling the operating ring 9 swings the fuse tube 7 downward, opening the circuit breaker. This action is also triggered by a blown fuse in the event of a fault. After opening the circuit breaker, check the status. Regular maintenance operations, such as cleaning and verifying components and replacing the fuse tube 7, ensure reliable operation of the device.

[0083] This ensures a stable and reliable device structure, securely installs the fuse tube 7, and provides reliable electrical connections, ensuring accurate and timely closing and opening of the circuit breaker for power transmission and disconnection. Regular maintenance also extends the device's lifespan, maintains good performance, and reduces the probability of power outages. This addresses issues such as unstable initial installation, poor installation and protection of the fuse tube 7, difficulty in closing and opening operations and confirming their status, and reduced reliability due to long-term lack of maintenance.

[0084] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase synchronous drop-out fuse proximal protection device, comprising an insulator (1), characterized in that: The outer wall of the insulator (1) is provided with a mounting plate (3), the outer wall of the mounting plate (3) is fixedly provided with a sheath (2), the bottom end of the mounting plate (3) is provided with a support frame (4), the middle part of the support frame (4) is provided on the outer wall of the insulator (1), the upper surface of the support frame (4) is provided with a movable groove, one end of the support frame (4) is symmetrically provided with a rubber baffle (6), the upper outer wall of the insulator (1) is provided with an upper wiring terminal, the lower outer wall of the insulator (1) is provided with a lower wiring terminal, the top outer wall of the insulator (1) is provided with a connecting plate (13), one end of the connecting plate (13) is provided with a trapezoidal piece (12), the upper surface of the connecting plate (13) is provided with a clamping mechanism, the bottom end of the insulator (1) is provided with a rotating mechanism, the top of the insulator (1) is provided with a protective mechanism, the bottom end of the clamping mechanism is provided with a fuse mechanism, and the bottom end of the fuse mechanism is provided on one side of the rotating mechanism.

2. A three-phase synchronous drop-out fuse proximal protection device according to claim 1, characterized in that: The clamping mechanism includes a top rod (18), the outer wall of the top rod (18) passes through the connecting plate (13) and is provided with a fixing block (17), the bottom end of the top rod (18) is provided on the upper surface of the trapezoidal piece (12), the interior of the fixing block (17) is symmetrically provided with a rotating shaft (30), the outer wall of the rotating shaft (30) is provided with an N-shaped arm (14), the outer wall of the N-shaped arm (14) is provided with a sliding groove (16), and one end of the N-shaped arm (14) is provided with a clamping block (28). One side of the clamping block (28) is arranged on the outer wall of the fuse mechanism, and the inside of the sliding groove (16) of the N-shaped arm (14) is symmetrically slidably connected to a connecting rod (15) through a rotating shaft six, and one end of the connecting rod (15) is rotatably connected to a fixed block two (29) through a rotating shaft seven, and the bottom end of the fixed block two (29) is arranged on the upper surface of the connecting plate (13), and a spring (19) is arranged on the lower surface of the connecting plate (13), and one end of the spring (19) is arranged on the upper surface of the trapezoidal piece (12).

3. A three-phase synchronous drop-out fuse proximal protection device according to claim 1, characterized in that: The clamping mechanism further includes two L-shaped plates (34), one end of the L-shaped plate (34) is arranged on one side of the trapezoidal piece (12), a spring 2 (35) is arranged on one side of the L-shaped plate (34), one end of the spring 2 (35) is arranged on a movable rod (39), a rotating shaft 5 (37) is arranged on the upper surface of the movable rod (39), a fixed block 3 (36) is arranged on the outer wall of the rotating shaft 5 (37), one end of the fixed block 3 (36) is arranged on one side of the trapezoidal piece (12), and an arc-shaped plate (38) is arranged on one end of the movable rod (39).

4. A three-phase synchronous drop-out fuse proximal protection device according to claim 1, characterized in that: A baffle (31) is fixedly provided on the lower surface of the trapezoidal piece (12), a connecting buckle (32) is symmetrically provided on one side of the baffle (31), and a buckle hook is provided at one end of the connecting buckle (32).

5. The three-phase synchronous drop-out fuse proximal protection device according to claim 1, characterized in that: The rotating mechanism includes a contact frame (5), one end of the contact frame (5) is arranged at the bottom end of the outer wall of the insulator (1), a rotating groove (26) is arranged in the middle of the contact frame (5), a rotating shaft (27) is arranged in the rotating groove (26) of the contact frame (5), a fixed frame (23) is symmetrically arranged on the outer wall of the rotating shaft (27), a rotating shaft (25) is arranged on one side of the fixed frame (23), and a stopper (24) is arranged on the outer wall of the rotating shaft (25).

6. A three-phase synchronous drop-out fuse proximal protection device according to claim 5, characterized in that: A torsion spring is provided between the stopper (24) and the second rotating shaft (25), one end of the stopper (24) is provided at the bottom end of the fuse tube (7), the other side of the fixing frame (23) is provided with a first rotating shaft (22), the outer wall of the first rotating shaft (22) is provided with a fixing plate (21), and one end of the fixing plate (21) is provided at the bottom end of the outer wall of the fuse tube (7).

7. The three-phase synchronous drop-out fuse proximal protection device according to claim 1, characterized in that: The protection mechanism comprises a fixing rod (11), a waterproof plate (10) is provided at the top end of the fixing rod (11), slopes are provided on both sides of the waterproof plate (10), a support plate (33) is provided on the upper surface of the waterproof plate (10), and one end of the support plate (33) is provided on the outer wall of the fixing rod (11).

8. The three-phase synchronous drop-out fuse proximal protection device according to claim 1, characterized in that: The fuse mechanism comprises a top head (20), the top end of the top head (20) is arranged on the lower surface of the trapezoidal piece (12), and the bottom end of the top head (20) is arranged on the top end of the fuse tube (7).

9. A three-phase synchronous drop-out fuse proximal protection device according to claim 8, characterized in that: The outer wall of the fuse tube (7) is provided with a ring sleeve (8), the outer wall of the ring sleeve (8) is provided with an operating ring (9), and the outer wall of the fuse tube (7) is provided on one end of the fixing plate (21) and the stopper (24) through the movable groove of the support frame (4).

10. A method for using a three-phase synchronous drop-out fuse proximal protection device, characterized in that: A three-phase synchronous drop-out fuse proximal protection device according to any one of claims 1 to 9 comprises the following steps: S1. Check the integrity of each mechanism component, align the device with the line through the insulator (1) terminal, and fix it to the pole using the connecting plate (13) and the support frame (4) to ensure that it is firmly installed; S2, align the top head (20) of the fuse tube (7) with the trapezoidal piece (12), insert it into the rotating mechanism along the movable groove, and the top head (20) is linked to the clamping mechanism to clamp the fuse tube (7), and simultaneously confirm that the protection mechanism functions normally; S3, using the operating tool to push the fuse tube (7) upward, the rotating mechanism block (24) flips, the torsion spring stores energy, the fuse tube (7) engages with the upper terminal clamping mechanism, the rotating mechanism resets and locks, the terminal conductivity is tested, and the circuit is confirmed to be energized; S4, pull the operating ring (9) to pull down the fuse tube (7), the rotating mechanism stopper (24) is unlocked, the fuse tube (7) falls down, and the clamping mechanism is released; when a fault occurs, the fuse is automatically triggered to fall, and after the switch is opened, the falling state of the fuse tube (7), the reset of the stopper (24) and the insulation of the circuit are checked; S5. Clean the insulator (1) and sheath (2) regularly, check the appearance of the fuse tube (7), verify the elasticity of the clamping mechanism spring (19) and the flexibility of the components, and replace damaged protective parts; replace the fuse tube (7) after opening the circuit breaker and grounding, and re-install and debug it to ensure reliable fault response.

Images