High-voltage fuse wire device easy to maintain

Abstract

The invention relates to the technical field of power distribution equipment, in particular to an easy-to-maintain high-voltage fuse wire device, which comprises an insulator and is characterized in that by arranging an alignment assembly, when the high-voltage fuse wire device is used for assembling and maintaining a connection fuse wire, the offset force caused by the zigzag characteristic of the connection fuse wire can be effectively offset, and the service life of the connection fuse wire is prolonged. According to the high-voltage fuse device, the end cover and the fuse tube are kept in a coaxial state, the assembly difficulty is reduced, and the core requirements of the power electronic component manufacturing field on the assembly precision and the operation reliability are met; the worm rotates to drive the worm gear to rotate, so that the limiting lead screw in threaded connection is stably lifted, the cavity cylinder and the insulating base are pulled to synchronously drive the conducting duck tongue piece to adjust the height, a traditional manual beating and pulling mode is replaced, and the problem of insufficient adjustment or excessive adjustment caused by improper force is effectively avoided; and it is ensured that the conducting duck tongue piece is always located at the optimal height matched with the brake.

Description

Technical Field

[0001] This invention relates to the field of power distribution equipment technology, specifically to an easy-to-maintain high-voltage fuse device. Background Technology

[0002] High-voltage fuse devices, as important power distribution equipment in the field of power electronic component manufacturing, typically consist of a conductive contact, an insulating support, a fuse tube, a fuse wire, upper and lower contacts, and an operating mechanism (such as a hook or spring assembly). Under normal operating conditions, the fuse wire is connected in series in the high-voltage circuit, and the current flows into the fusible element through the upper contact and is then discharged through the lower contact. When the circuit current abnormally exceeds the rated value, the fuse wire melts rapidly due to the Joule heating effect, and the fuse tube automatically falls under the action of gravity or spring force, cutting off the faulty circuit.

[0003] In the manufacturing and actual operation and maintenance of power electronic components, existing high-voltage fuse devices face two key problems during operation and maintenance and fuse assembly: First, the contact contact plate is prone to positioning deviation during installation and deforms due to current heating and mechanical vibration during long-term operation, often resulting in excessive height. Manual adjustment requires tools to be hammered or pried, with the force and angle entirely dependent on experience, making it difficult to control the adjustment amount. Insufficient force results in the height still exceeding the standard and preventing closing, while excessive force results in the height being too low, causing loosening after closing. This not only involves repeated operations but also consumes time. Firstly, the long fuse length reduces maintenance efficiency and can easily damage the fuse tab, shortening its lifespan and increasing the risk of fuse failure and power outage. Secondly, the existing connecting fuses are designed with a preset curve shape to fit the fuse tube space and meet the fusing tension requirements. During assembly, the top end cap is prone to misalignment with the top of the fuse tube due to the inherent tortuous nature of the connecting fuse. This leads to difficulty in alignment and increased screwing resistance when the fuse tube is screwed into the upper contact. In severe cases, it can cause poor contact between the end cap and the upper contact, increased local resistance, and abnormal heating, increasing the potential for power distribution system failures. Summary of the Invention

[0004] The purpose of this invention is to provide an easy-to-maintain high-voltage fuse device to solve the two problems in the operation, maintenance and assembly of high-voltage fuse devices mentioned in the background art: First, the conductive duckbill plate is prone to excessive deformation due to installation deviation and long-term deformation, which is difficult to control manually based on experience, is time-consuming, and is a vulnerable part that increases the risk of power supply failure; Second, the connecting fuse is difficult to screw on due to the preset curve and the end cap and fuse tube are not concentric, resulting in poor contact, affecting the protection function and shortening the equipment life.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an easy-to-maintain high-voltage fuse device, comprising an insulator, a fuse tube longitudinally disposed on one side of the insulator, and an upper contact threaded onto the top of the fuse tube. A mounting base is fixedly installed on one side of the top of the insulator. A conductive duckbill is disposed on the side of the mounting base near the upper contact. A compression spring is fixedly connected between the top side of the conductive duckbill and the bottom side of the mounting base. An insulating seat is fixedly installed outside the top side of the conductive duckbill located between the compression springs. A liquid injection assembly is disposed at the top of the insulating seat. An insulating protective cover is fixedly installed on the side of the mounting base near the top of the compression spring. A maintenance adjustment assembly is disposed inside the insulating protective cover. The maintenance adjustment assembly includes a rotating seat and a worm gear. The rotating seat is rotatably mounted inside the mounting base on the side near the compression spring. The worm gear is rotatably engaged on the outside of the top side of the rotating seat. A connecting fuse is threaded through the fuse tube. An end cap is fixedly installed at the top of the connecting fuse. An alignment assembly is disposed at the bottom of the end cap.

[0006] Furthermore, a lower terminal is fixedly installed on one side of the bottom end of the insulator, and a lower contact is fixedly installed on the bottom end of the fuse tube. The lower contact is mounted on one side of the top end of the lower terminal. An operating ring is fixedly installed on the outside of the fuse tube near the upper contact. The alignment assembly includes an end cover and several contact springs. The end cover is attached to the outside of the fuse tube near the top end of the upper contact. Several contact springs are arranged at equal angles around the outside of the bottom edge of the end cover. The bottom end of the end cover is fixedly connected to the top end of the connecting fuse. Each contact spring is C-shaped. An insulating positioning seat is fixedly installed on the end cover near the bottom end of each contact spring. A fixing bolt is threaded between one end of the contact spring and the inside of one side of the insulating positioning seat. An insulating rubber pad is provided on the side of each contact spring near the inner wall of the fuse tube.

[0007] Furthermore, an upper terminal block is fixedly installed on the top side of the mounting base away from the insulating protective cover. One end of the upper terminal block is connected and fixed to one end of the conductive duckbill. Two limiting strips are symmetrically fixedly installed on the outside of the conductive duckbill away from the upper terminal block.

[0008] Furthermore, a limiting screw is vertically threaded through the middle of the worm gear, and a hollow cylinder is fixedly installed at the bottom end of the limiting screw. Several limiting blocks are fixedly installed at equal angles around the top edge of the hollow cylinder, and an inner rod is fixedly installed at the bottom end of each limiting block.

[0009] Furthermore, a sleeve rod is vertically and slidably engaged at the bottom end of the inner rod, and the bottom end of the sleeve rod is fixedly installed at one edge of the top of the insulating base. A return spring is sleeved on the outside of the inner rod and the sleeve rod, and the two ends of the return spring are respectively fixedly installed at one side of the top of the insulating base and one side of the bottom of the limiting block.

[0010] Furthermore, a worm is meshed with one side of the worm gear, and a fixed seat is rotatably mounted on both ends of the worm. One end of each fixed seat is fixedly mounted on the outside of the top side of the mounting seat, and a hexagonal rotating block is coaxially fixed to one end of the worm.

[0011] Furthermore, the liquid injection assembly includes a piston block and a storage tank. The piston block is slidably and sealingly installed inside the bottom side of the cavity cylinder. The storage tank is fixedly installed outside the top side of the mounting base near the insulating protective cover. A sealing cap is threadedly connected to the top side of the storage tank. An abutment rod is vertically fixedly installed in the middle of the bottom end of the piston block.

[0012] Furthermore, the bottom end of the abutment rod is slidably installed outside the bottom end of the cavity cylinder, the bottom end of the abutment rod is fixedly installed at the top center of the insulating base, and a one-way liquid inlet valve pipe is fixedly installed through the top end of the cavity cylinder, with the input end of the one-way liquid inlet valve pipe fixedly installed inside the bottom side of the storage tank.

[0013] Furthermore, a one-way drain valve pipe is fixedly installed inside the cavity cylinder near the top of the one-way inlet valve pipe. A fixing frame is fixedly installed on the outside of the insulating base near the bottom. A conductive connector is fixedly installed at the end of the fixing frame away from the insulating base. The output end of the one-way drain valve pipe is fixedly installed inside the conductive connector on one side. Two conductive pipes are symmetrically fixedly installed on both sides of the conductive connector.

[0014] Furthermore, each of the two guide tubes has a guide tube fixedly installed at the end away from the guide joint. The guide tube is arc-shaped, and a nozzle is fixedly installed at the end of the guide tube away from the guide tube. The output end of the nozzle is located on the side facing the bottom of the guide tongue piece.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By configuring the alignment components, this high-voltage fuse device effectively counteracts the offset force caused by the tortuous characteristics of the connecting fuse during assembly and maintenance. This ensures that the end cap and the top of the fuse tube remain coaxial, solving the misalignment problem in traditional assembly. The screwing process is smooth and without jamming, reducing assembly difficulty and effectively preventing local resistance increases and abnormal heating, thus ensuring overall operational stability. This aligns with the core requirements of assembly precision and operational reliability in the power electronic component manufacturing field. Furthermore, the maintenance adjustment components allow the high-voltage fuse device to adjust the height of the conductive duckbill by using the rotation of the worm gear to drive the worm wheel, which in turn smoothly raises the limit screw of the threaded connection, thereby pulling... The moving cavity cylinder and insulating base synchronously drive the conduction duckbill to adjust its height, replacing the traditional manual hammering and prying method. This mechanical transmission design can precisely control the adjustment amount, effectively avoiding problems of insufficient or excessive adjustment caused by improper force, ensuring that the conduction duckbill is always at the optimal height for closing, taking into account both smooth closing and tight engagement. At the same time, the hexagonal rotating block at the end of the worm gear allows maintenance personnel to operate conveniently with tools, without relying on experience to judge force and angle, greatly reducing errors caused by differences in manual operation, and avoiding additional deformation damage caused by direct contact with the conduction duckbill. This significantly improves maintenance efficiency and equipment lifespan in power electronic component manufacturing and maintenance scenarios, making the whole system easy to maintain and adjust.

[0016] By incorporating an insulating oil injection component, insulating oil is sprayed onto one side of the contact tongue during each closing operation. This creates a uniform lubricating layer on the contact sliding surfaces of the upper contact and limit bar, significantly reducing frictional resistance between metal components. This prevents closing jams caused by rough contact surfaces or minute impurities. Simultaneously, it slows down surface scratches and metal debris caused by reverse-combination, delaying the wear rate of the contact tongue and upper contact. It also encapsulates minute impurities on the contact surface to prevent embedding and accelerated wear. This effectively avoids problems such as contact tongue deformation and reduced contact area caused by wear, extending component lifespan, reducing unplanned replacement frequency, and meeting the high standards required for long-term stable operation in the power electronic component manufacturing industry. This provides a superior solution for power electronic component manufacturing and power distribution system maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a three-dimensional structural diagram of the mounting base and the conductive duckbill plate of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the worm gear and the limiting lead screw of the present invention; Figure 6 This is a three-dimensional structural diagram of the connection between the fuse and the end cap of the present invention; Figure 7 This is a three-dimensional structural diagram of the contact spring sheet and the insulating positioning seat of the present invention; Figure 8 This is a schematic diagram of the front sectional view of the end cap and the top of the fuse tube of the present invention being installed together. Figure 9 This is a three-dimensional structural diagram of the insulating base and sleeve rod of the present invention; Figure 10 for Figure 9 Enlarged structural diagram at point C; Figure 11 This is a partial cross-sectional three-dimensional structural schematic diagram of the cavity cylinder and piston block of the present invention; Figure 12 For the present invention Figure 11 Enlarged structural diagram at point D; Figure 13 This is a schematic diagram demonstrating how the rotation of the fuse tube causes the upper contact to come into contact with the conductive duckbill plate.

[0018] The attached diagram lists the components represented by each number as follows: 1. Insulator; 2. Lower terminal; 3. Lower contact; 4. Fuse tube; 5. Mounting base; 6. Upper terminal; 7. Conductive contact plate; 8. Upper contact; 9. Limiting strip; 10. Compression spring; 11. Insulating base; 12. Hollow cylinder; 13. Limiting block; 14. Inner rod; 15. Sleeve rod; 16. Return spring; 17. Insulating protective cover; 18. Rotating seat; 19. Worm gear; 20. Limiting screw; 21. Fixed base; 22. Worm gear 23. Rod; 24. Hexagonal rotating block; 25. Piston block; 26. Abutting rod; 27. One-way drain valve pipe; 28. Fixing bracket; 29. ​​Conducting connector; 30. Conducting pipe; 31. Guide pipe; 32. Nozzle; 33. One-way inlet valve pipe; 34. Storage tank; 35. Sealing cap; 36. Operating ring; 37. Connecting fuse; 38. End cap; 39. Abutting spring sheet; 40. Insulating positioning seat; 41. Insulating rubber pad; 42. Fixing bolt. Detailed Implementation

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

[0020] Example 1: Please refer to Figures 1-10 A maintenance-friendly high-voltage fuse device includes an insulator 1, a fuse tube 4 longitudinally arranged on one side of the insulator 1, and an upper contact 8 threaded onto the top of the fuse tube 4. A mounting base 5 is fixedly installed on one side of the top of the insulator 1. A conductive duckbill 7 is provided on the side of the mounting base 5 near the upper contact 8. A compression spring 10 is fixedly connected between the top side of the conductive duckbill 7 and the bottom side of the mounting base 5. An insulating base 11 is fixedly installed on the outside of the top side of the conductive duckbill 7 located between the compression springs 10. An insulating protective cover 17 is fixedly installed on the side of the mounting base 5 near the top of the compression spring 10. The inside of the insulating protective cover 17 is a maintenance and adjustment component. The maintenance and adjustment component includes a rotating base 18 and a worm gear 19. The rotating base 18 is rotatably installed inside the mounting base 5 on the side near the compression spring 10. The worm gear 19 is rotatably engaged on the outside of the top side of the rotating base 18. A connecting fuse 36 is inserted inside the fuse tube 4. An end cap 37 is fixedly installed on the top of the connecting fuse 36. An alignment component is provided at the bottom of the end cap 37.

[0021] A lower terminal 2 is fixedly installed on one side of the bottom end of the insulator 1. A lower contact 3 is fixedly installed on the bottom end of the fuse tube 4. The lower contact 3 is mounted on one side of the top end of the lower terminal 2. An operating ring 35 is fixedly installed on the outside of the fuse tube 4 near the upper contact 8. The alignment assembly includes an end cover 37 and several contact springs 38. The end cover 37 is attached to the outside of the top end of the fuse tube 4 near the upper contact 8. Several contact springs 38 are arranged at equal angles around the outside of the bottom edge of the end cover 37. The bottom end of the end cover 37 is fixedly connected to the top end of the connecting fuse 36. Each contact spring 38 is C-shaped. An insulating positioning seat 39 is fixedly installed on the bottom end of the end cover 37 near each contact spring 38. A fixing bolt 41 is threaded between one end of the contact spring 38 and the inside of one side of the insulating positioning seat 39. An insulating rubber pad 40 is provided on the side of each contact spring 38 near the inner wall of the fuse tube 4.

[0022] An upper terminal 6 is fixedly installed on the top side of the mounting base 5 away from the insulating protective cover 17. One end of the upper terminal 6 is connected and fixed to one end of the conductive duck tongue 7. Two limiting strips 9 are symmetrically fixedly installed on the outside of the conductive duck tongue 7 away from the upper terminal 6.

[0023] A limiting screw 20 is vertically threaded through the middle of the worm gear 19. A cavity cylinder 12 is fixedly installed at the bottom end of the limiting screw 20. Several limiting blocks 13 are fixedly installed at equal angles around the top edge of the cavity cylinder 12. An inner rod 14 is fixedly installed at the bottom end of each limiting block 13.

[0024] The bottom end of the inner rod 14 is vertically slidably engaged with the sleeve rod 15. The bottom end of the sleeve rod 15 is fixedly installed on one side edge of the top of the insulating seat 11. The inner rod 14 and the sleeve rod 15 are sleeved with a return spring 16. The two ends of the return spring 16 are respectively fixedly installed on one side of the top of the insulating seat 11 and one side of the bottom of the limiting block 13.

[0025] A worm 22 is meshed and connected to one side of the worm gear 19. Both ends of the worm 22 are rotatably mounted with a fixed seat 21. One end of the fixed seat 21 is fixedly mounted on the outside of the top side of the mounting base 5. A hexagonal rotating block 23 is coaxially fixed to one end of the worm 22.

[0026] In this embodiment, when the device is in its initial state, the insulator 1 is vertically fixed, and the mounting base 5 on one side of its top end remains horizontal and stable. The conductive duckbill 7 is connected to one side of the bottom end of the mounting base 5 through a compression spring 10. The compression spring 10 is in a naturally extended state, so that the conductive duckbill 7 maintains its initial height. The upper terminal 6 on the side of the mounting base 5 away from the insulating protective cover 17 is fixedly connected to one end of the conductive duckbill 7 to ensure that the current conduction path is basically unobstructed. The fuse tube 4 is longitudinally arranged on one side of the insulator 1. The lower end contact 3 at its bottom end is mounted on the top of the lower terminal 2. The connecting fuse 36 inside is in a normal conductive state. The upper end contact 8 at the top end is not in contact with the conductive duckbill 7. The operating ring 35 outside the fuse tube 4 is convenient for the operator to hold and operate.

[0027] When closing is required, the operator uses an insulated tool to hold the operating ring 35 and rotates the fuse tube 4 upwards, causing the upper contact 8 at the top of the fuse tube 4 to gradually approach the conductive duckbill 7. As the rotation angle increases, the upper contact 8 contacts the side of the conductive duckbill 7 away from the upper terminal 6 and generates a resisting force. This resisting force pushes the conductive duckbill 7 upwards to compress the compression spring 10 until the upper contact 8 is completely in contact with the conductive duckbill 7. The limiting strips 9 on both sides of the conductive duckbill 7 limit the upper contact 8 to prevent it from sliding or deviating. At this point, the closing operation is initially completed, and the current can sequentially pass through the upper terminal 6, the conductive duckbill 7, the upper contact 8, the connecting fuse 36, the lower contact 3, and the lower terminal 2 to form a complete circuit, meeting the requirements for circuit conduction stability in the field of power electronic component manufacturing.

[0028] If, during the closing process, the upper contact 8 fails to smoothly engage with the conductive duckbill 7 (i.e., the height of the conductive duckbill 7 is too high), the height of the conductive duckbill 7 needs to be adjusted using the maintenance adjustment assembly. The specific steps are as follows: First, the operator rotates the fuse tube 4 in the reverse direction using the operating ring 35 to separate the upper contact 8 from the conductive duckbill 7, thus releasing the closing state. Then, using an adapter tool (such as a hex wrench), the operator inserts it into the hexagonal rotating block 23 to rotate it. When the hexagonal rotating block 23 rotates, it drives the worm gear 22 to rotate stably around its own axis. When the worm gear 22 rotates, it drives the worm wheel 19 to rotate at the top of the rotating seat 18. When the worm wheel 19 rotates, the threaded transmission causes the limit screw 20 to rise smoothly in the vertical direction. The hollow cylinder 12 fixed at the bottom of the limit screw 20 rises along with it. The limit block 13 at the top edge of the hollow cylinder 12 synchronously drives the inner rod 14 at the bottom to rise and move. During the upward movement, the insulating base 11 is pulled upward by the sleeve rod 15, which in turn drives the conductive duckbill 7 to rise synchronously. During the adjustment process, the operator continuously rotates the hexagonal rotating block 23 until the height of the conductive duckbill 7 is adjusted to the appropriate position, thereby reducing the distance between the conductive duckbill 7 and the mounting base 5. When the fuse tube 4 is rotated again by the operating ring 35, the upper contact 8 can smoothly fit with the conductive duckbill 7 without loosening or jamming. At this time, the rotation of the hexagonal rotating block 23 is stopped, and the maintenance adjustment component completes the height adjustment work, replacing the traditional manual knocking and prying method. This mechanical transmission design can precisely control the adjustment amount, effectively avoiding the problem of insufficient or excessive adjustment caused by improper force, ensuring that the conductive duckbill 7 is always at the optimal height for closing, taking into account both smooth closing and tight engagement, which meets the requirements of power electronic component manufacturing for convenient and precise equipment maintenance.

[0029] It should also be noted that during the assembly of the connecting fuse 36, one end of the connecting fuse 36 is first inserted into the fuse tube 4, so that the end cap 37 fixed at the top of the connecting fuse 36 fits against the outer part of the fuse tube 4 near the top of the upper contact 8, completing the initial positioning. At this time, several C-shaped rings are evenly arranged around the bottom edge of the end cap 37. The T-shaped contact spring 38 generates a uniform contact force against the inner wall of the fuse tube 4 due to its elasticity. Because the contact spring 38 is symmetrically distributed around the circumference, it can form a balanced limit on the end cap 37 from the circumference of the fuse tube 4, offsetting the offset force generated by the fuse 36 due to the preset curve characteristics. This forces the end cap 37 and the fuse tube 4 to remain concentric, ensuring that when the upper contact 8 is screwed into the top of the fuse tube 4, the two are precisely aligned, and the screwing process is smooth and without jamming, greatly reducing the assembly difficulty. At the same time, the good concentric contact ensures that the contact area between the end cap 37 and the upper contact 8 is sufficient and the pressure is uniform, effectively avoiding local resistance increase and abnormal heating, significantly improving the assembly reliability and long-term operational stability of the fuse, ensuring that its protection function is accurately performed, and extending the overall service life of the equipment.

[0030] During assembly and operation, the insulating rubber pad 40 on the side of the contact spring sheet 38 closest to the inner wall of the fuse tube 4 directly contacts the inner wall of the fuse tube 4. By utilizing the elasticity and cushioning properties of the rubber material, direct friction between the contact spring sheet 38 and the metal of the inner wall of the fuse tube 4 is avoided, thus preventing wear or scratches on the inner wall of the fuse tube 4 and protecting its structural integrity.

[0031] When the connecting fuse 36 fails and needs to be replaced, since each contact spring 38 is threadedly connected to the insulating positioning seat 39 at the bottom of the end cover 37 by a fixing bolt 41, the maintenance personnel can unscrew the fixing bolt 41 and remove the undamaged contact spring 38 from the insulating positioning seat 39 of the old end cover 37; then align the removed contact spring 38 with the insulating positioning seat 39 of the end cover 37 of the new connecting fuse 36, and screw the fixing bolt 41 back in to fix it, thus realizing the reuse of the contact spring 38, reducing maintenance costs and improving replacement efficiency.

[0032] Example 2: Please refer to Figures 11-13 This embodiment further illustrates Example 1, wherein a liquid injection assembly is provided at the top of the insulating base 11.

[0033] The liquid injection assembly includes a piston block 24 and a storage tank 33. The piston block 24 is slidably and sealed inside the bottom side of the cavity cylinder 12. The storage tank 33 is fixedly installed on the outside of the top side of the mounting base 5 near the insulating protective cover 17. A sealing cap 34 is threadedly connected to the top side of the storage tank 33. An abutment rod 25 is vertically fixedly installed in the middle of the bottom end of the piston block 24.

[0034] The bottom end of the contact rod 25 is slidably installed outside the bottom end of the cavity cylinder 12. The bottom end of the contact rod 25 is fixedly installed at the top center of the insulating base 11. A one-way liquid inlet valve pipe 32 is fixedly installed through the top end of the cavity cylinder 12. The input end of the one-way liquid inlet valve pipe 32 is fixedly installed inside the bottom side of the storage tank 33.

[0035] A one-way drain valve pipe 26 is fixedly installed inside the cavity cylinder 12 near the top of the one-way inlet valve pipe 32. A fixing bracket 27 is fixedly installed on the outside of the insulating base 11 near the bottom. A connecting connector 28 is fixedly installed at the end of the fixing bracket 27 away from the insulating base 11. The output end of the one-way drain valve pipe 26 is fixedly installed inside the connecting connector 28 on one side. Two connecting pipes 29 are symmetrically fixedly installed on both sides of the connecting connector 28.

[0036] Both guide tubes 29 have a guide tube 30 fixedly installed at the end away from the guide joint 28. The guide tube 30 is arc-shaped. A nozzle 31 is fixedly installed at the end of the guide tube 30 away from the guide tube 29. The output end of the nozzle 31 is located on the side facing the bottom of the guide tongue piece 7.

[0037] In this embodiment, when the operator closes the circuit by rotating the fuse tube 4 through the operating ring 35, the upper contact 8 at the top of the fuse tube 4 contacts the conductive duckbill 7 upward. Under the action of the contact force, the conductive duckbill 7 overcomes the preload of the compression spring 10 and moves upward. At the same time, the insulating seat 11 fixed on one side of the top of the conductive duckbill 7 moves upward together. The contact rod 25 fixed in the middle of the top of the insulating seat 11 moves upward synchronously. Since the top of the contact rod 25 is fixedly connected to the piston block 24 inside the cavity cylinder 12, the contact rod 25 pushes the piston block 24 to slide vertically upward inside the cavity cylinder 12. The upward movement of the piston block 24 compresses the internal space of the cavity cylinder 12, and the pressure increases sharply. At this time, the insulating oil in the cavity cylinder 12 flows into the conductive joint 28 through the one-way drain valve pipe 26 under the pressure, and then flows through the two sides of the conductive joint 28. The conductive tube 29 on the side delivers the lubricant to the arc-shaped guide tube 30, and finally the nozzle 31 at the end of the guide tube 30 precisely sprays the lubricant onto the bottom side of the conductive duckbill 7, forming a uniform insulating and lubricating layer. This significantly reduces the frictional resistance between metal components, avoids closing jams caused by rough contact surfaces or small impurities, and at the same time, slows down the generation of surface scratches and metal debris caused by anti-compound circuit breakers. It also slows down the wear rate of the conductive duckbill 7 and the upper contact 8, and can also wrap small impurities on the contact surface to prevent them from embedding and aggravating wear. This effectively avoids problems such as deformation of the conductive duckbill 7 and reduction of contact area caused by wear, extends the service life of components, reduces the frequency of unplanned replacements, meets the high standard requirements of the power electronic component manufacturing field for long-term stable operation of equipment, and provides a better solution for power electronic component manufacturing and power distribution system operation and maintenance.

[0038] It should also be noted that during the tripping operation (such as when the connecting fuse 36 blows due to a fault, causing the fuse tube 4 to fall, or when the fuse tube 4 is manually rotated in the reverse direction), the upper contact 8 separates from the conductive duckbill 7, the compression spring 10 releases its stored force to push the conductive duckbill 7 downward to reset, and the insulating seat 11 moves downward synchronously with the conductive duckbill 7, pulling the piston block 24 downward in the cavity cylinder 12 through the contact rod 25; the downward movement of the piston block 24 expands the internal space of the cavity cylinder 12, and the pressure decreases significantly. The insulating oil in the storage tank 33 is drawn into the cavity cylinder 12 under negative pressure adsorption through the one-way liquid inlet valve pipe 32, completing the replenishment and storage of insulating oil; each time the circuit is closed and opened, a process of liquid injection during closing and oil suction during opening is triggered to ensure that the conductive duckbill 7 is covered with a fresh insulating lubricating layer after each action, while the cavity cylinder 12 always maintains a sufficient amount of insulating oil to ensure the continuous and stable operation of the components.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A maintenance-friendly high-voltage fuse device, comprising an insulator (1), a fuse tube (4) longitudinally disposed on one side of the insulator (1), and an upper contact (8) threaded onto the top of the fuse tube (4), characterized in that: A mounting base (5) is fixedly installed on one side of the top end of the insulator (1). A conductive duckbill plate (7) is provided on the side of the mounting base (5) near the upper contact (8). A compression spring (10) is fixedly connected between the top side of the conductive duckbill plate (7) and the bottom side of the mounting base (5). An insulating seat (11) is fixedly installed on the outside of the top side of the conductive duckbill plate (7) between the compression springs (10). An injection component is provided at the top of the insulating seat (11). An insulating protective cover (17) is fixedly installed on the side of the mounting base (5) near the top of the compression spring (10). A maintenance and adjustment component is provided inside the insulating protective cover (17). The maintenance and adjustment assembly includes a rotating seat (18) and a worm gear (19). The rotating seat (18) is rotatably mounted inside the mounting base (5) on the side near the compression spring (10). The worm gear (19) is rotatably engaged on the outside of the top side of the rotating seat (18). A connecting fuse (36) is passed through the inside of the fuse tube (4). An end cap (37) is fixedly mounted on the top of the connecting fuse (36). An alignment component is provided at the bottom of the end cap (37).

2. The easy-maintain high-voltage fuse device according to claim 1, characterized in that: A lower terminal (2) is fixedly installed on one side of the bottom end of the insulator (1), and a lower contact (3) is fixedly installed on the bottom end of the fuse tube (4). The lower contact (3) is mounted on one side of the top end of the lower terminal (2). An operating ring (35) is fixedly installed on the outside of the fuse tube (4) near the upper contact (8). The alignment assembly includes an end cap (37) and several contact springs (38). The end cap (37) is attached to the outside of the fuse tube (4) near the top end of the upper contact (8). The several contact springs (38) are arranged at equal angles. The end cap (37) is located on the outside of the bottom edge of the end cap (37). The bottom end of the end cap (37) is fixedly connected to the top end of the connecting fuse (36). Each of the abutting spring pieces (38) is C-shaped. An insulating positioning seat (39) is fixedly installed on the end cap (37) near the bottom end of each abutting spring piece (38). A fixing bolt (41) is threaded between one end of the abutting spring piece (38) and the inside of one side of the insulating positioning seat (39). An insulating rubber pad (40) is provided on the side of each abutting spring piece (38) near the inner wall of the fuse tube (4).

3. The easy-maintain high-voltage fuse device according to claim 1, characterized in that: The mounting base (5) is fixedly installed with an upper terminal (6) on the top side away from the insulating protective cover (17). One end of the upper terminal (6) is connected and fixed to one end of the conductive duckbill (7). Two limiting strips (9) are symmetrically fixedly installed on the outside of the conductive duckbill (7) away from the upper terminal (6).

4. The easy-maintain high-voltage fuse device according to claim 1, characterized in that: A limiting screw (20) is vertically threaded through the middle of the worm gear (19). A cavity cylinder (12) is fixedly installed at the bottom end of the limiting screw (20). Several limiting blocks (13) are fixedly installed around the top edge of the cavity cylinder (12) at equal angles. An inner rod (14) is fixedly installed at the bottom end of each limiting block (13).

5. The easy-maintain high-voltage fuse device according to claim 4, characterized in that: The bottom end of the inner rod (14) is vertically slidably engaged with a sleeve rod (15). The bottom end of the sleeve rod (15) is fixedly installed on one side edge of the top end of the insulating seat (11). A return spring (16) is sleeved on the outside of the inner rod (14) and the sleeve rod (15). The two ends of the return spring (16) are respectively fixedly installed on one side of the top end of the insulating seat (11) and one side of the bottom end of the limiting block (13).

6. The easy-maintain high-voltage fuse device according to claim 1, characterized in that: A worm (22) is meshed and connected to one side of the worm wheel (19). Both ends of the worm (22) are rotatably mounted with a fixed seat (21). One end of the fixed seat (21) is fixedly mounted on the outside of the top side of the mounting base (5). A hexagonal rotating block (23) is coaxially fixed to one end of the worm (22).

7. The easy-maintain high-voltage fuse device according to claim 4, characterized in that: The liquid injection assembly includes a piston block (24) and a storage tank (33). The piston block (24) is slidably and sealed inside the bottom side of the cavity cylinder (12). The storage tank (33) is fixedly installed on the outside of the top side of the mounting base (5) near the insulating protective cover (17). A sealing cap (34) is threadedly connected to the top side of the storage tank (33). An abutment rod (25) is vertically fixedly installed at the middle of the bottom end of the piston block (24).

8. The easy-maintain high-voltage fuse device according to claim 7, characterized in that: The bottom end of the abutment rod (25) is slidably installed outside the bottom end of the cavity cylinder (12), and the bottom end of the abutment rod (25) is fixedly installed at the top center of the insulating seat (11). A one-way liquid inlet valve pipe (32) is fixedly installed through the top end of the cavity cylinder (12), and the input end of the one-way liquid inlet valve pipe (32) is fixedly installed inside the bottom side of the storage tank (33).

9. The easy-maintain high-voltage fuse device according to claim 8, characterized in that: A one-way drain valve pipe (26) is fixedly installed inside the top of the cavity cylinder (12) near the one-way inlet valve pipe (32). A fixing bracket (27) is fixedly installed on the outside of the insulating seat (11) near the bottom. A connecting connector (28) is fixedly installed at the end of the fixing bracket (27) away from the insulating seat (11). The output end of the one-way drain valve pipe (26) is fixedly installed inside the connecting connector (28) on one side. Two connecting pipes (29) are symmetrically fixedly installed on both sides of the connecting connector (28).

10. The easy-maintain high-voltage fuse device according to claim 9, characterized in that: Both of the two guide tubes (29) have a guide tube (30) fixedly installed at the end away from the guide joint (28). The guide tube (30) is arc-shaped. A nozzle (31) is fixedly installed at the end of the guide tube (30) away from the guide tube (29). The output end of the nozzle (31) is located on the bottom side facing the guide tongue piece (7).

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