A three-phase synchronous drop-out fuse near-end protection device and method

Abstract

The application relates to the technical field of fuses, and discloses a three-phase synchronous drop type fuse near-end protection device and method, which comprises 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 one end of the support frame is arranged on the outer wall of the insulator, the upper surface of the support frame is provided with a movable groove, the other end of the support frame is symmetrically provided with a rubber baffle, and the upper end outer wall of the insulator is provided with an upper connecting terminal. Through linkage cooperation between the components, closing fixing effect is achieved, the fuse tube can be firmly clamped by the clamping block, the position of the fuse tube is ensured to be stable, the electrical connection is ensured to be stable, the circuit is ensured to be normally conducted, meanwhile, good mechanical structure cooperation is shown, the components are sequentially and orderly moved, the service life of the device is prolonged, and the operation risk is reduced. The problem that the fuse tube is not fixed stably after being closed is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuses, in particular to a near-end protection device and method for a three-phase synchronous drop-out fuse. BACKGROUND

[0002] In the power distribution network, drop-out fuses are widely used, and the fuse tube is a core component. It is crucial to fix the fuse tube after closing. The traditional drop-out fuse has some deficiencies. Its structure lacks effective protection for the fuse tube after closing. On the one hand, the fuse tube is often fixed by simple clamping or one-way limiting. Due to the influence of external wind, vibration, etc., the fuse tube is prone to loosen and shift, resulting in unstable electrical connection with the terminal, increased contact resistance, heating, sparking, etc. This affects the current conduction, accelerates the aging of the components, and even threatens the safety of the power distribution network. On the other hand, after frequent opening and closing operations, the fuse tube is difficult to return to the initial stable position due to the lack of reliable reset and fixing mechanism, and the fixing effect becomes worse. With the increasing demand for power supply reliability in the power system, the problem of unstable fixation of the fuse tube after closing in the traditional fuse is becoming more and more prominent, and it is urgent to improve the protection device to solve this problem. SUMMARY

[0003] To solve the problem of unstable fixation of the fuse tube after closing, the present application provides a near-end protection device and method for a three-phase synchronous drop-out fuse.

[0004] To achieve the above purpose, the present application realizes the following technical scheme: a near-end protection device for a three-phase synchronous drop-out fuse, comprising an insulator, an installation plate is provided on the outer wall of the insulator, a protective sleeve is fixedly provided on the outer wall of the installation plate, a support frame is provided at the bottom end of the installation plate, the middle part of the support frame is arranged on the outer wall of the insulator, an active slot is provided on the upper surface of the support frame, rubber baffles are symmetrically arranged at one end of the support frame, an upper terminal is provided on the upper end of the insulator, a lower terminal is provided on the lower end of the insulator, a connecting plate is provided on the top end of the insulator, a trapezoidal sheet is provided at one end of the connecting plate, a clamping mechanism is provided on the upper surface of the connecting plate, a rotating mechanism is provided at the bottom end of the insulator, a protection mechanism is provided at the top end of the insulator, a fuse mechanism is provided at the bottom end of the clamping mechanism, and the fuse mechanism is arranged on one side of the rotating mechanism.

[0005] By adopting the above technical scheme, the device can be stably installed, accurately positioned, and reliably cooperated on the mechanical structure. In terms of electrical performance, it can ensure stable connection, timely and effective fault response, and can resist environmental interference and reduce the risk of accidental damage, thereby ensuring long-term reliable operation of the device in complex outdoor environments and improving the safety and stability of the overall circuit.

[0006] Preferably, the clamping mechanism comprises a jack, the outer wall of the jack is provided with a fixed block one through the connecting plate, the bottom end of the jack is arranged on the upper surface of the trapezoidal sheet, the inside of the fixed block one is symmetrically provided with a rotating shaft four, the outer wall of the rotating shaft four is provided with an N-shaped arm, the outer wall of the N-shaped arm is provided with a sliding groove, one end of the N-shaped arm is provided with a clamping block, one side of the clamping block is arranged on the outer wall of the fuse mechanism, the sliding groove of the N-shaped arm is symmetrically and slidably connected with a connecting rod through a rotating shaft six, one end of the connecting rod is rotatably connected with a fixed block two through a rotating shaft seven, the bottom end of the fixed block two is arranged on the upper surface of the connecting plate, the lower surface of the connecting plate is provided with a spring, one end of the spring is arranged on the upper surface of the trapezoidal sheet.

[0007] Preferably, the clamping mechanism further comprises two L-shaped plates, one end of the L-shaped plate is arranged on one side of the trapezoidal sheet, one side of the L-shaped plate is provided with a spring two, one end of the spring two is provided with a movable rod, the upper surface of the movable rod is provided with a rotating shaft five, the outer wall of the rotating shaft five is provided with a fixed block three, one end of the fixed block three is arranged on one side of the trapezoidal sheet, one end of the movable rod is provided with an arc-shaped plate.

[0008] Preferably, the lower surface of the trapezoidal sheet is fixedly provided with a baffle, one side of the baffle is symmetrically provided with a connecting buckle, one end of the connecting buckle is provided with a buckle hook.

[0009] Preferably, the rotating mechanism comprises a contact head frame, one end of the contact head frame is arranged on the bottom end of the outer wall of the insulator, the middle part of the contact head frame is provided with a rotating groove, the rotating groove of the contact head frame is provided with a rotating shaft three, the outer wall of the rotating shaft three is symmetrically provided with a fixed frame, one side of the fixed frame is provided with a rotating shaft two, the outer wall of the rotating shaft two is provided with a stop block.

[0010] Preferably, a torsional spring is arranged between the stop block and the rotating shaft two, one end of the stop block is arranged on the bottom end of the fuse tube, the other side of the fixed frame is provided with a rotating shaft one, the outer wall of the rotating shaft one is provided with a fixed plate, one end of the fixed plate is arranged on the bottom end of the outer wall of the fuse tube.

[0011] Preferably, the protection mechanism comprises a fixed rod, the top end of the fixed rod is provided with a waterproof plate, the two sides of the waterproof plate are provided with slopes, the upper surface of the waterproof plate is provided with a supporting plate, one end of the supporting plate is arranged on the outer wall of the fixed rod.

[0012] Preferably, the fuse mechanism comprises a top head, the top end of the top head is arranged on the lower surface of the trapezoidal sheet, the bottom end of the top head 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, the outer wall of the fuse tube is arranged on one end of the fixed plate and the stop block through the movable groove of the supporting frame.

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

[0015] S1, check the integrity of each mechanism part, align the device with the line through the insulator terminal, and fix it on the electric pole by the connecting plate and support frame to ensure firm installation;

[0016] S2, align the fuse tube top end with the trapezoidal sheet, insert it into the rotating mechanism along the movable slot, and clamp the fuse tube with the top head linkage clamping mechanism, and simultaneously confirm the normal function of the protection mechanism;

[0017] S3, push the fuse tube upwards with the help of the operating tool, the rotating mechanism block is overturned and the torsion spring is stored, the fuse tube is clamped with the upper terminal clamping mechanism, the rotating mechanism is reset and locked, the test terminal is conducted, and the circuit is confirmed to be powered on;

[0018] S4, pull down the fuse tube by pulling the operating ring, the rotating mechanism block is unlocked, the fuse tube is lowered and dropped, and the clamping mechanism is released; when a fault occurs, the fuse is automatically triggered to drop out, and after the switch is opened, the fuse tube drop state, the block reset and the circuit insulation are checked;

[0019] S5, regularly clean the insulator and sheath, check the appearance of the fuse tube, check the spring elasticity of the clamping mechanism and the flexibility of the parts, and replace the damaged protection parts; after grounding, replace the fuse tube, reposition and debug to ensure reliable fault response.

[0020] The application provides a three-phase synchronous drop-out fuse near-end protection device and method.

[0021] 1. The application realizes the closing and fixing effect through the linkage cooperation between the parts, can firmly clamp the fuse tube with the clamping block, ensures the stable position, guarantees the stable electrical connection and normal circuit conduction, and has good mechanical structure synergy, so that the parts move coherently and orderly, which is beneficial to prolong the service life of the device and reduce the operation risk.

[0022] 2. The fixed connection between the fixed frame and the rotating shaft in the rotating mechanism realizes rigid transmission and precise action, shortens the opening action time, improves the action reliability, the bidirectional positioning structure guarantees the stability of the fuse tube when closing, effectively resists external interference, maintains the stability of the electrical contact resistance, has the self-resetting function to simplify the closing operation process and improve the operation and maintenance efficiency.

[0023] 3. This invention, through the sloping design of the waterproof plate in the protective mechanism and the reinforced support plate, achieves effective waterproofing and drainage, reliable wind and dust protection, and good resistance to impacts from external objects. It reduces the probability of electrical failures, improves operational reliability and service life, and also reduces the frequency of maintenance and component replacement due to unforeseen circumstances. It solves the problems of poor waterproofing of electrical components and the impact of dust and debris on device performance.

[0024] 4. This invention achieves stable circuit continuity through the coordinated operation of various components of the fuse mechanism, preventing circuit operation from being affected by abnormalities such as poor contact; it offers convenient operation, allowing operators to easily complete related operations through the control loop; it also possesses efficient fault isolation capabilities, quickly cutting off faulty circuits when the fuse blows, protecting the safety of the power distribution system. It solves the problems of unstable fuse tube position affecting electrical connections and inconvenient operation.

[0025] 5. This invention enhances the clamping stability of the fuse mechanism through the cooperation of multiple components in the clamping mechanism, forming a multi-directional clamping system with flexible adaptive capabilities to cope with changes in the state of the fuse mechanism. It also improves the convenience of operation and maintenance, reducing operational difficulty and workload. It solves the problem that insufficient clamping in one direction easily leads to the fuse mechanism shaking and displacement. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the front side of a three-phase synchronous drop-out fuse near-end protection device proposed in this invention.

[0027] Figure 2 This is a partial structural diagram of the rubber baffle of a near-end protection device for a three-phase synchronous drop-out fuse proposed in this invention.

[0028] Figure 3 This is a partial structural diagram of a fixing block of a near-end protection device for a three-phase synchronous drop-out fuse proposed in this invention.

[0029] Figure 4 This is a partial structural diagram of the contact frame of a near-end protection device for a three-phase synchronous drop-out fuse proposed in this invention.

[0030] Figure 5 This is a partial structural diagram of the N-shaped arm of a near-end protection device for a three-phase synchronous drop-out fuse proposed in this invention.

[0031] Figure 6 This is a partial structural diagram of the sheath of a three-phase synchronous drop-out fuse near-end protection device proposed in this invention.

[0032] Figure 7 This is a partial structural diagram of the fuse tube of a near-end protection device for a three-phase synchronous drop-out fuse proposed in this invention.

[0033] Figure 8 A partial structure diagram of a spring of a three-phase synchronous drop-out fuse near-end protection device is provided in the present application.

[0034] Figure 9 A partial structure sectional view of a connecting plate of a three-phase synchronous drop-out fuse near-end protection device is provided in the present application.

[0035] Figure 10 A flow chart of a use method of a three-phase synchronous drop-out fuse near-end protection device is provided in the present application.

[0036] 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, fixed rod; 12, trapezoidal piece; 13, connecting plate; 14, N-shaped arm; 15, connecting rod; 16, sliding groove; 17, fixed block one; 18, jacking rod; 19, spring; 20, top head; 21, fixed plate; 22, rotating shaft one; 23, fixed frame; 24, stop block; 25, rotating shaft two; 26, rotating groove; 27, fixed block two; 28, rotating shaft three; 29, clamping block; 30, rotating shaft four; 31, baffle; 32, connecting buckle; 33, support plate; 34, L-shaped plate; 35, spring two; 36, fixed block three; 37, rotating shaft five; 38, arc-shaped plate; 39, movable rod. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be described clearly and completely below in combination with the drawings of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] Embodiment one:

[0039] Please refer to the drawings of the present application Figure 1 - the drawings of the present application Figure 5The embodiment of the present application provides a kind of three-phase synchronous drop-out fuse protector near-end protection device, including insulator 1, the outer wall of insulator 1 is provided with mounting plate 3, the outer wall of mounting plate 3 is fixedly provided with sheath 2, the bottom of mounting plate 3 is provided with support frame 4, the middle part of support frame 4 is arranged on the outer wall of insulator 1, the upper surface of support frame 4 is provided with movable slot, one end of support frame 4 is symmetrically provided with rubber baffle 6, the upper end outer wall of insulator 1 is provided with upper terminal, the lower end outer wall of insulator 1 is provided with lower terminal, the top end outer wall of insulator 1 is provided with connecting plate 13, one end of connecting plate 13 is provided with trapezoidal sheet 12, the upper surface of connecting plate 13 is provided with clamping mechanism, the bottom of insulator 1 is provided with rotating mechanism, the top of insulator 1 is provided with protection mechanism, the bottom of clamping mechanism is provided with fuse mechanism, the bottom of fuse mechanism is arranged on one side of rotating mechanism.

[0040] Insulator 1 is as the basic support component of device, and the structure of inclination is provided, installation reference is provided for each component. The outer wall of mounting plate 3 is fixed to insulator 1, and is used for bearing sheath 2, support frame 4 and other components. Sheath 2 plays a protective role on mounting plate 3 and peripheral electrical connection parts, to avoid external factors from affecting normal operation of the device. Support frame 4 is positioned by the middle part and the outer wall of insulator 1, the movable slot on the upper surface of support frame 4 provides space for the movement of fuse mechanism, and the rubber baffle 6 at one end is used for limiting when fuse mechanism acts, to prevent excessive swing.

[0041] Through the cooperation of each mechanical component, stable clamping and positioning during installation of fuse mechanism are realized, and precise drop action during switching off is realized.

[0042] The clamping mechanism includes top rod 18, the outer wall of top rod 18 is provided with fixed block one 17, the bottom of top rod 18 is arranged on the upper surface of trapezoidal sheet 12, the inside of fixed block one 17 is symmetrically provided with rotating shaft four 30, the outer wall of rotating shaft four 30 is provided with N-shaped arm 14, the outer wall of N-shaped arm 14 is provided with sliding groove 16, one end of N-shaped arm 14 is provided with clamping block 28, one side of clamping block 28 is arranged on the outer wall of fuse mechanism, the inside of sliding groove 16 of N-shaped arm 14 is symmetrically connected with connecting rod 15 through rotating shaft six, one end of connecting rod 15 is rotatably connected with fixed block two 29 through rotating shaft seven, the bottom of fixed block two 29 is arranged on the upper surface of connecting plate 13, the lower surface of connecting plate 13 is provided with spring 19, one end of spring 19 is arranged on the upper surface of trapezoidal sheet 12.

[0043] In the initial state, the spring 19 is in a certain state of extension, one end of which is connected to the lower surface of the connecting plate 13, and the other end abuts against the upper surface of the trapezoidal sheet 12, thereby exerting a certain elastic force on the trapezoidal sheet 12. The top rod 18 penetrates through the connecting plate 13 and has a bottom end located on the upper surface of the trapezoidal sheet 12, and the fixed block one 17 is in a corresponding position by being fixedly connected with the top rod 18. The N-shaped arm 14 is rotatably installed by means of the symmetrical rotation shaft four 30 arranged inside the fixed block one 17, and the sliding groove 16 of the N-shaped arm 14 is symmetrically and slidably connected with the connecting rod 15 through the rotation shaft six, one end of the connecting rod 15 is rotatably connected with the fixed block two 29 through the rotation shaft seven, and the fixed block two 29 is stably arranged on the upper surface of the connecting plate 13. The connecting relationship between the components constitutes the static structure basis of the entire clamping mechanism.

[0044] When the closing operation is performed, the top head 20 on the fuse tube 7 will interact with the trapezoidal sheet 12, and the top head 20 will push the trapezoidal sheet 12 upward. As the trapezoidal sheet 12 rises, the spring 19 located on the upper surface of the trapezoidal sheet 12 and in the state of extension will be gradually compressed, and begin to store elastic potential energy. At the same time, the top rod 18 will move upward synchronously under the driving of the rising trapezoidal sheet 12, and since the top rod 18 is fixedly connected with the fixed block one 17, the fixed block one 17 will also move upward with the top rod 18. The upward movement of the fixed block one 17 will act on the N-shaped arm 14, and make the N-shaped arm 14 rotate around the rotation shaft four 30 inside the N-shaped arm 14. In the process of rotation of the N-shaped arm 14, the connecting rod 15 connected with the N-shaped arm 14 through the rotation shaft six in the outer wall sliding groove 16 of the N-shaped arm 14 will produce relative sliding in the sliding groove 16, and the connecting rod 15 will rotate around the rotation shaft seven connected with the fixed block two 29. Under the cooperative action of the structure of the fixed block two 29, the connecting rod 15 and the N-shaped arm 14 itself, the N-shaped arm 14 can complete the rotating action. The clamping block 28 arranged at one end of the N-shaped arm 14 will gradually approach the outer wall of the fuse tube 7 with the rotation of the N-shaped arm 14, and finally clamp the fuse tube 7, so as to fix the fuse tube 7, ensure that it can stably stay in the corresponding position under the normal working state after closing, and guarantee the reliable conduction of the circuit and the stable operation of the entire device.

[0045] Through the orderly linkage and cooperation between the components, a reliable closing and fixing effect is achieved, the clamping block 28 can firmly clamp the fuse tube 7, the position of the fuse tube 7 is ensured to be stable, the electrical connection is ensured to be stable, the circuit is ensured to be normally conducted, and the mechanical structure is cooperated well, so that the components move coherently and orderly, which is beneficial to prolong the service life of the device and reduce the operation risk. The problem of unstable fixation of the fuse tube 7 after closing is solved.

[0046] The lower surface of the trapezoidal sheet 12 is fixedly provided with a baffle 31, one side of the baffle 31 is symmetrically provided with a connecting buckle 32, and one end of the connecting buckle 32 is provided with a buckle hook.

[0047] The lower surface of the trapezoidal sheet 12 is fixedly provided with a baffle plate 31, which is in a specific position and bears corresponding functions. On one side of the baffle plate 31, symmetrically arranged is a connecting buckle 32, one end of which is equipped with a buckle hook structure. This symmetric arrangement can provide balanced connection and fixing from both sides during use, ensuring uniform stress and avoiding component deflection due to unilateral stress.

[0048] The connecting buckle 32 can establish a reliable connection between the device and other related components through its buckle hook structure and stable connection with the baffle plate 31. Whether in a static installation state or during device operation, it can effectively prevent connected components from loosening or falling off, ensuring the relative position stability between components and maintaining the integrity of the entire device structure and the reliability of the coordinated work of each part.

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

[0050] The rotating mechanism takes the contact holder 5 as the basic support component, one end of which is fixed to the bottom end of the outer wall of the insulator 1. The rotating groove 26 in the middle of the contact holder 5 is provided with the rotating shaft three 27, and the fixed frame 23 is fixedly connected with the rotating shaft three 27, so that the fixed frame 23 can synchronously rotate around the rotating shaft three 27. The stop block 24 is installed on one side of the fixed frame 23 through the rotating shaft two 25, and the torsion spring is arranged between the stop block 24 and the rotating shaft two 25. In the initial state, the elastic force of the torsion spring makes one end of the stop block 24 tightly abut against the bottom end of the fuse tube 7, forming a limiting constraint. The fixed plate 21 is arranged on the other side of the fixed frame 23 through the rotating shaft one 22, and one end of the fixed plate 21 is attached to the bottom end of the outer wall of the fuse tube 7, together with the stop block 24, forming a bidirectional positioning structure for the fuse tube 7, ensuring that the fuse tube 7 maintains a stable electrical connection position in the closed state.

[0051] When the fuse tube 7 loses the axial tension due to the overload or short circuit fault, the downward torque is exerted on the stop block 24 under the action of the gravity of the fuse tube 7 and the electric power generated by the fault current. When the torque exceeds the pre-tightening force of the torsion spring, the stop block 24 rotates counterclockwise around the second rotating shaft 25, and the limiting of the fuse tube 7 is released. Since the fixed frame 23 is fixedly connected with the third rotating shaft 27, the gravity torque of the fuse tube 7 is transmitted to the fixed frame 23 through the fixed plate 21, and the fixed frame 23 is driven to rotate as a whole around the third rotating shaft 27, so that the fuse tube 7 falls along the preset track to the open position, and the circuit is cut off. In this process, the fixed connection between the fixed frame 23 and the third rotating shaft 27 ensures the rigidity of torque transmission, and avoids the action delay or jam caused by relative sliding.

[0052] When the artificial closing operation is performed, the fuse tube 7 is pushed upward, the inclined surface structure at the bottom end of the fuse tube 7 pushes the stop block 24 to rotate clockwise against the resistance of the torsion spring, until the stop block 24 is reset under the action of the spring force and re-locks the bottom end of the fuse tube 7. At the same time, the fixed plate 21 rotates synchronously with the fixed frame 23 around the third rotating shaft 27 to the closed position, and cooperates with the stop block 24 to lock the fuse tube 7 in the closed state, and completes the double reset of mechanical and electrical connection.

[0053] The fixed connection between the fixed frame 23 and the third rotating shaft 27 in the rotating mechanism realizes rigid transmission and precise action, shortens the opening action time, and improves the action reliability; the bidirectional positioning structure guarantees the stability of the fuse tube 7 in the closed state, effectively resists external interference, and maintains the stability of the electrical contact resistance; the self-resetting function simplifies the closing operation process and improves the operation and maintenance efficiency. The action delay problem existing in the traditional hinged structure is solved.

[0054] The protection mechanism includes a fixed rod 11, and the top end of the fixed rod 11 is provided with a waterproof plate 10, the two sides of the waterproof plate 10 are provided with slopes, and the upper surface of the waterproof plate 10 is provided with a supporting plate 33, one end of the supporting plate 33 is arranged on the outer wall of the fixed rod 11.

[0055] The protection mechanism takes the fixed rod 11 as the main supporting structure, one end of which is fixed on the corresponding base part of the device to provide a stable support point for the whole protection mechanism. The top end of the fixed rod 11 is provided with a waterproof plate 10, which is in a specific shape and has slope structures on both sides. The design of the slope has a clear drainage guide function. When rainwater, dew or other liquid substances fall on the waterproof plate 10, the liquid substances will naturally slide to both sides along the slope, avoiding accumulation on the upper surface of the waterproof plate 10.

[0056] Meanwhile, a support plate 33 is arranged on the upper surface of the waterproof plate 10, and one end of the support plate 33 is connected to the outer wall of the fixed rod 11. The support plate 33 serves to provide additional support for the waterproof plate 10, enhance the structural stability of the waterproof plate 10 when facing various external forces, prevent the waterproof plate 10 from deforming, shifting, and the like due to external forces, and ensure that the waterproof plate 10 can always maintain a good covering and protection state.

[0057] Through the slope design of the waterproof plate 10 and the reinforced support of the support plate 33, effective waterproof and drainage, reliable wind and dust prevention, and good anti-impact ability are achieved, the probability of electrical failure is reduced, the operation reliability and service life are improved, and the frequency of maintenance and replacement of parts due to accidents is also reduced. The problems of poor waterproofing of electrical components and the influence of dust and debris on device performance are solved.

[0058] The fuse mechanism includes a top head 20, the top end of which is arranged on the lower surface of the trapezoidal sheet 12, and the bottom end of which 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 arranged on one end of the fixed plate 21 and the stop block 24 through the movable slot of the support frame 4.

[0059] The fuse mechanism mainly includes a top head 20, a fuse tube 7, a ring sleeve 8, and an operating ring 9. The top head 20 serves as a connection hub, with its top end closely attached to the lower surface of the trapezoidal sheet 12 to achieve mechanical connection between the fuse mechanism and the structure above, and its bottom end firmly arranged on the top end of the fuse tube 7 to associate the fuse tube 7 with the relevant structure above, ensuring force transmission and the coherence of the overall structure.

[0060] The fuse inside the fuse tube 7 serves to conduct current in the circuit and fuse to cut off the circuit in the event of a fault. The outer wall of the fuse tube 7 is provided with a ring sleeve 8, the outer diameter of which is adapted to the fuse tube 7, and the two are combined to ensure that the ring sleeve 8 can be stably sleeved on the fuse tube 7. The outer wall of the ring sleeve 8 is provided with an operating ring 9, which is a component for manual operation by the operator. Its shape and size conform to the principles of ergonomics, facilitating gripping and force application, so as to perform corresponding operations on the fuse tube 7.

[0061] During normal operation of the device, current passes through the fuse in the fuse tube 7, realizing the conduction of the circuit. At this time, the fuse tube 7 is fixed in position under the combined action of the top head 20, the fixed plate 21 and the stop block 24, and does not shake or shift. The top head 20 transmits the support force from the structure above and balances the gravity of the fuse tube 7 below and the force of other components; the fixed plate 21 supports the outer wall of the fuse tube 7 from one side to assist in maintaining its stable radial position; and the stop block 24 limits the fuse tube 7 at one end to prevent it from moving accidentally in the axial direction, ensuring that the fuse in the fuse tube 7 maintains good electrical connection with other connection points in the circuit, so that the entire circuit can operate stably and reliably.

[0062] When the opening operation is required, the operator can apply an external force to the fuse tube 7 by grasping the operating ring 9. If it is a normal power-off operation, the operator pulls down the operating ring 9, which drives 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 gradually comes off the limit of the stop block 24, and the fuse tube 7 as a whole rotates around the contact points with other components under the action of its own gravity and external force, finally realizing the falling of the fuse tube 7 and thus cutting off the circuit.

[0063] Through the coordinated cooperation of the components of the fuse mechanism, stable circuit conduction protection is realized, avoiding abnormal effects on circuit operation due to poor contact, etc. It has convenient operation convenience, which allows the operator to easily complete the relevant operation through the operating ring 9. It also has efficient fault isolation capability, which can quickly cut off the fault circuit when the fuse is blown, protecting the safety of the power distribution system. The problems of unstable position of the fuse tube 7 affecting electrical connection and inconvenient operation are solved.

[0064] Embodiment Two:

[0065] Please refer to the accompanying Figure 6 with the accompanying Figure 9 On the basis of the above-mentioned embodiments, the present embodiment is used to solve the problem that one-way clamping is insufficient and easy to cause the fuse mechanism to shake and shift. The following scheme is used to realize it.

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

[0067] One end of the L-shaped plate 34 in the clamping mechanism is fixedly arranged on one side of the trapezoidal sheet 12, forming a stable mounting base. On one side of the L-shaped plate 34 is connected spring two 35, which is in a certain initial stretched state, and one end of which is connected with the movable rod 39.

[0068] The upper surface of the movable rod 39 is provided with a rotating shaft five 37, and the outer wall of the rotating shaft five 37 is provided with a fixed block three 36, one end of the fixed block three 36 is fixed on one side of the trapezoidal sheet 12, which enables the movable rod 39 to rotate at a certain angle with the rotating shaft five 37 as the axis. One end of the movable rod 39 is provided with an arc-shaped plate 38, the shape of the arc-shaped plate 38 is matched with the contour of the outer wall of the fuse mechanism, and the arc-shaped plate 38 is used to make close contact with the fuse mechanism.

[0069] In the initial state, the elastic force of the spring two 35 acts on the movable rod 39, so that the movable rod 39 is in a relatively stable angle position through the cooperation of the rotating shaft five 37 and the fixed block three 36, and the arc-shaped plate 38 maintains a certain initial relative position relationship with the fuse mechanism, and the whole structure is in a balanced state, which is 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 extrusion 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 five 37. In the process of rotating the movable rod 39, the spring two 35 will be compressed.

[0071] With the rotation of the movable rod 39, the arc-shaped plate 38 will be more closely attached to the outer wall of the fuse mechanism, and through the friction generated by this close contact and the elastic force of the spring two 35, an auxiliary clamping force is applied from the side direction of the fuse mechanism, which ensures that the fuse mechanism will not displace or shake horizontally during normal operation.

[0072] When the fuse mechanism acts due to some circumstances, the external force applied by the fuse mechanism to the movable rod 39 will change. When the fuse tube 7 falls, the extrusion force on the movable rod 39 will decrease, and at this time the elastic restoring force of the spring two 35 will act, pushing the movable rod 39 to rotate in the opposite direction, so that the arc-shaped plate 38 gradually loosens the close contact with the fuse mechanism, allowing the fuse mechanism to smoothly perform the corresponding action according to the subsequent mechanism.

[0073] Through the cooperation of multiple components of the clamping mechanism, the clamping stability of the fuse mechanism is enhanced, forming a multi-directional clamping system with flexible self-adaptive ability to cope with the state change of the fuse mechanism, and improving the operation convenience, reducing the operation difficulty and workload. It solves the problem that single-direction clamping is easy to make the fuse mechanism shake and displace.

[0074] Example three:

[0075] Please refer to the attached drawings Figure 10 On the basis of the above-mentioned embodiments, the present embodiment is used to solve the problems that may affect the reliable operation of the device in the whole process of installation, operation and maintenance due to components, operations, protection and other links, and is realized through the following scheme.

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

[0077] S1, check the integrity of each mechanism component, connect the device with the line through the insulator 1 terminal, and fix it on the electric pole by using the connecting plate 13 and the support frame 4 to ensure firm installation;

[0078] S2, align the fuse tube 7 top end with the trapezoidal piece 12, and insert it into the rotating mechanism along the movable slot, and the top end 20 linkage clamping mechanism clamps the fuse tube 7, and synchronously confirms the normal function of the protection mechanism;

[0079] S3, push the fuse tube 7 upwards with the help of the operating tool, the rotating mechanism stop block 24 is overturned and the torsion spring is stored, the fuse tube 7 is clamped with the upper terminal clamping mechanism, the rotating mechanism is reset and locked, the test terminal is tested for conduction, and the circuit is confirmed to be powered on;

[0080] S4, pull down the fuse tube 7 by pulling the operating ring 9, the rotating mechanism stop block 24 is unlocked, the fuse tube 7 is lowered and dropped, and the clamping mechanism is released; when a fault occurs, the fuse is automatically triggered to drop out, and after the switch is opened, the drop state of the fuse tube 7, the reset of the stop block 24 and the insulation of the circuit are checked;

[0081] S5, regularly clean the insulator 1 and the sheath 2, check the appearance of the fuse tube 7, check the elasticity of the clamping mechanism spring 19 and the flexibility of the components, and replace the damaged protection parts; after grounding, replace the fuse tube 7, reposition and debug to ensure reliable fault response.

[0082] First, check the integrity of each component and install the device on the electric pole to lay the foundation for subsequent operation. Then, align the fuse tube 7 with the relevant components and insert it into the rotating mechanism, and the linkage clamping mechanism clamps and confirms the protection. Then, push the fuse tube 7 with the help of the tool, so that the rotating mechanism acts to realize closing and test the conduction to ensure power supply. Pulling the operating ring 9 allows the fuse tube 7 to lower and open the switch, and when a fault occurs, the fuse is also triggered to trigger this action, and the state is checked after the switch is opened. Regularly clean, check and replace the fuse tube 7 and other maintenance operations to ensure reliable operation of the device.

[0083] The guarantee device is stable and reliable in structure, realizes stable installation and reliable electrical connection of the fuse tube 7, guarantees accurate and timely closing and opening, can also prolong the service life of the device, maintain good performance and reduce the probability of power failure through regular maintenance. The problems of unstable initial installation, poor installation and protection of the fuse tube 7, difficult closing and opening operation and state confirmation and reduced reliability due to lack of maintenance during long-term operation are solved.

[0084] While embodiments of the present application have been shown and described with reference to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. The scope of the application is defined by the appended claims and their equivalents.

Claims

1. A near-end protection device for a three-phase synchronous drop-out fuse, comprising an insulator (1), characterized in that: The insulator (1) is provided with an installation plate (3) on its outer wall. The installation plate (3) is fixedly provided with a sleeve (2) on its outer wall. The bottom end of the installation plate (3) is provided with a support frame (4). The middle part of one end 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. The other end of the support frame (4) is symmetrically provided with rubber baffles (6). The upper outer wall of the insulator (1) is provided with an upper terminal. The lower outer wall of the insulator (1) is provided with a lower terminal. One end of the connecting plate (13) is connected to the top outer wall of the insulator (1). The other 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 end of the insulator (1) is provided with a protective mechanism. The bottom end of the clamping mechanism is provided with a fuse mechanism. The bottom end of the fuse mechanism is located on one side of the rotating mechanism. The clamping mechanism includes a top rod (18), the outer wall of which penetrates the connecting plate (13) and is provided with a fixing block (17). The bottom end of the top rod (18) is located on the upper surface of the trapezoidal piece (12). The fixing block (17) is symmetrically provided with a rotating shaft (30). One end of the N-shaped arm (14) is connected to the outer wall of the rotating shaft (30). The outer wall of the N-shaped arm (14) is provided with a sliding groove (16). The other end of the N-shaped arm (14) is provided with a clamping block (28). One side of the clamping block (28) is set on the outer wall of the fuse mechanism. One end of the connecting rod (15) is symmetrically slidably connected to the inside of the groove (16) of the N-shaped arm (14) through the rotating shaft six. The other end of the connecting rod (15) is rotatably connected to the fixing block two (29) through the rotating shaft seven. The bottom end of the fixing block two (29) is set on the upper surface of the connecting plate (13). One end of the spring (19) is connected to the lower surface of the connecting plate (13). The other end of the spring (19) is set on the upper surface of the trapezoidal piece (12).

2. The near-end protection device for a three-phase synchronous drop-out fuse according to claim 1, characterized in that: The clamping mechanism also includes two L-shaped plates (34), which are disposed on one side of the trapezoidal piece (12). One end of the second spring (35) is connected to one side of the L-shaped plate (34), and the other end of the second spring (35) is provided with a movable rod (39). The upper surface of the movable rod (39) is provided with a rotating shaft five (37), and the outer wall of the rotating shaft five (37) is provided with a fixing block three (36). The fixing block three (36) is disposed on one side of the trapezoidal piece (12), and the outer side of the movable rod (39) is provided with an arc plate (38).

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

4. The near-end protection device for a three-phase synchronous drop-out fuse according to claim 1, characterized in that: The rotating mechanism includes a contact frame (5), one end of which is located at the bottom of the outer wall of the insulator (1). A rotating groove (26) is provided in the middle of the contact frame (5). A rotating shaft three (27) is provided in the rotating groove (26) at the other end of the contact frame (5). A fixing frame (23) is symmetrically provided on the outer wall of the rotating shaft three (27). A rotating shaft two (25) is provided on one side of the fixing frame (23). A stop block (24) is provided on the outer wall of the rotating shaft two (25).

5. A near-end protection device for a three-phase synchronous drop-out fuse according to claim 4, characterized in that: A torsion spring is provided between the stop block (24) and the second rotating shaft (25). One end of the stop block (24) is connected to the second rotating shaft (25), and the other end of the stop block (24) is located at the bottom end of the fuse tube (7). A first rotating shaft (22) is provided on the other side of the fixing frame (23). One end of the fixing plate (21) is connected to the outer wall of the first rotating shaft (22), and the other end of the fixing plate (21) is located at the bottom end of the outer wall of the fuse tube (7).

6. The near-end protection device for a three-phase synchronous drop-out fuse according to claim 1, characterized in that: The protective mechanism includes a fixed rod (11), a waterproof plate (10) is provided at the top of the fixed rod (11), and slopes are provided on both sides of the waterproof plate (10). One end of the support plate (33) is connected to the upper surface of the waterproof plate (10), and the other end of the support plate (33) is provided on the outer wall of the fixed rod (11).

7. A near-end protection device for a three-phase synchronous drop-out fuse according to claim 1, characterized in that: The fuse mechanism includes a top head (20), the top end of which is disposed on the lower surface of the trapezoidal plate (12), and the bottom end of which is disposed on the top end of the fuse tube (7).

8. A near-end protection device for a three-phase synchronous drop-out fuse according to claim 5, characterized in that: The outer wall of the fuse tube (7) is provided with a ring sleeve (8), and the outer wall of the ring sleeve (8) is provided with an operating ring (9). The outer wall of the fuse tube (7) is provided at the other end of the fixed plate (21) and the stop block (24) through the movable groove of the support frame (4).

9. A method of using a near-end protection device for a three-phase synchronous drop-out fuse, characterized in that, A near-end protection device for a three-phase synchronous drop-out fuse as described in any one of claims 1-8, comprising the following steps: S1. Check the integrity of each component and align the device with the line through the insulator (1) terminal block. Fix it to the pole using the connecting plate (13) and support frame (4) to ensure a secure installation. S2. Align the top end (20) of the fuse tube (7) with the trapezoidal piece (12), insert it into the rotating mechanism along the movable groove, and clamp the fuse tube (7) with the linkage clamping mechanism of the top end (20). Simultaneously confirm that the protective mechanism is functioning normally. S3. Push the fuse tube (7) upward with the operating tool, the rotating mechanism stop (24) flips and twists the spring to store energy, the fuse tube (7) engages with the upper terminal clamping mechanism, the rotating mechanism resets and locks, the continuity of the terminal is tested, and the circuit is confirmed to be powered. S4. Pull the operating ring (9) to pull down the fuse tube (7), the rotating mechanism block (24) is unlocked, the fuse tube (7) swings down and falls, and the clamping mechanism is released; in case of a fault, the fuse blows and automatically triggers the fall. After the circuit is opened, check the fall status of the fuse tube (7), the reset of the block (24) and the circuit insulation. S5. Regularly clean the insulators (1) and sheaths (2), 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 the damaged protective parts; after the circuit breaker is tripped and grounded, replace the fuse tube (7), reposition and debug, and ensure reliable fault response.

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