A conductive structure with split connectors and a fuse using the same

Abstract

The application discloses a conductive structure with split connecting pieces and a fuse using the same, and belongs to the technical field of outdoor fuses. The conductive structure comprises a porcelain bottle (1), a base (2) arranged at the bottom of the porcelain bottle (1), and a fuse tube (3) arranged in the porcelain bottle (1) and the base (2). The fuse tube (3) is connected with a plurality of lower static contact heads (7) and a lower static contact head copper plate (9), and the lower static contact head (7) is in abutment with the outer wall of a lower moving contact head (6) sleeved on the fuse tube (3) on one side of the lower static contact head (7). Adjacent two lower static contact heads (7) are spaced apart. The split lower static contact head (7) is convenient for workers to disassemble and install, and when being replaced, the whole lower static contact head (7) does not need to be replaced, and only the lower static contact head (7) needing to be repaired needs to be replaced, so that the maintenance cost and assembly time are reduced. When being installed, the lower static contact head (7) buffers the impact generated by the fuse tube (3) and the lower moving contact head (6) by utilizing the elastic deformation of the lower static contact head (7) itself, compensates for the assembly gap between the components, and improves the assembly precision and the service life of the structure.

Description

Technical Field

[0001] This invention belongs to the field of outdoor fuse technology. Specifically, this invention relates to a conductive structure with a split connector and a fuse using the structure. Background Technology

[0002] Outdoor enclosed jet-type fuses are mainly suitable for 10kV distribution transformers, used for primary side protection and switching rated current. They have excellent environmental adaptability and stability, and are particularly suitable for areas with high requirements for power distribution stability and harsh natural environments with severe pollution. Currently, most traditional fuses on the market use fixed integrated conductive connectors, which often require the entire conductive connector to be disassembled and replaced, resulting in slow replacement efficiency and high replacement costs. Furthermore, the integrated structure can easily damage other connected components during disassembly, affecting the service life of the device.

[0003] For example, the announcement dated July 17, 2026, with announcement number CN224520367. A Chinese utility model patent specification discloses a quick-connect connector with integrated fuse protection. The connector's socket portion includes a socket shell, a base, a long copper busbar, a short copper busbar, and a fuse. The rear end of the socket shell is detachably connected to the base. A fuse is housed in a groove on one side of the base, and the short copper busbar is integrally injection-molded to its front end on the same side. The long copper busbar is integrally injection-molded to its other side. The first lug of the long copper busbar is exposed on one side of the base's end. The second lug of the short copper busbar is exposed at the front end of the groove. The front lug of the fuse is attached to the second lug and connected via a first threaded component, while the rear lug is attached to the other side of the base's end. The front ends of the positive and negative power cables are respectively attached to the rear lug and the first lug and connected via a second threaded component, connecting the fuses in series in the power circuit. This utility model has the advantages of a compact overall structure, optimized cost, and high protection performance. However, the conductive connector uses an integrally injection-molded copper busbar structure and is connected to the fuse. When the conductive connector needs to be replaced, due to its integral molding structure, the entire connector must be replaced, resulting in high replacement costs and a long replacement time. Summary of the Invention

[0004] The present invention aims to provide a conductive structure with a split connector that does not require replacement of the entire conductive connector during disassembly and assembly.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a conductive structure with a split connector, comprising a porcelain bottle; a base is provided at the bottom of the porcelain bottle; a fused tube is provided inside the porcelain bottle and the base; a lower lead wire fixing seat is provided on the side wall of the base, a lower lead wire is connected inside the lower lead wire fixing seat, a lower movable contact is provided inside the base, the lower movable contact is sleeved on the fused tube, and the lower movable contact is connected to the lower lead wire fixing seat;

[0006] It also includes at least two lower stationary contacts and a lower stationary contact support, wherein the lower stationary contact support is disposed on the inner wall of the porcelain insulator; a lower stationary contact copper plate is disposed on the lower stationary contact support; the lower stationary contact and the lower stationary contact copper plate are connected; one side of the lower stationary contact abuts against the outer wall of the lower moving contact.

[0007] Furthermore, the lower stationary contact is provided with a connecting foot; the connecting foot is located on one end of the lower stationary contact, and the connecting foot is connected to the copper plate of the lower stationary contact; the other end of the lower stationary contact is provided with a bent foot; the bent foot is bent in the direction of extension of the connecting foot; the copper plate of the lower stationary contact is sandwiched between the connecting foot and the bent foot.

[0008] Furthermore, the lower stationary contact is evenly distributed on the inner wall of the lower stationary contact copper plate; the contact surface of the lower stationary contact and the lower moving contact is provided with segmented grooves.

[0009] Furthermore, the inner wall of the lower stationary contact support is provided with a copper plate support platform; the bottom of the lower stationary contact copper plate rests on the copper plate support platform; a clearance groove is provided on one side of the lower stationary contact support; a connecting piece is provided on the bottom of the lower stationary contact copper plate; a fixing nut is provided on one side of the lower lead wire fixing seat; the lower lead wire is connected to the fixing nut; one end of the connecting piece is connected to the lower stationary contact copper plate, and the other end of the connecting piece passes through the clearance groove and is connected to the fixing nut.

[0010] Furthermore, the inner wall of the porcelain bottle is provided with a snap-fit ​​groove; the outer wall of the lower stationary contact support is provided with a snap-fit ​​section; the snap-fit ​​section snaps into the snap-fit ​​groove.

[0011] Furthermore, a lower stationary contact insulating cover is provided above the lower moving contact; the lower stationary contact insulating cover is fitted onto the outer wall of the molten metal; the lower stationary contact insulating cover and the upper end of the lower moving contact abut against each other; the lower stationary contact is engaged between the lower stationary contact insulating cover and the lower moving contact.

[0012] Furthermore, a spring is fitted on the outer wall of the molten tube, and the spring is located below the lower moving contact; the upper end of the spring abuts against the bottom surface of the lower moving contact; a copper sleeve is fitted on the bottom of the molten tube; and the lower end of the spring abuts against the copper sleeve.

[0013] Furthermore, the lower stationary contact support is provided with a through hole; the fusible tube and the lower moving contact pass through the through hole; and the lower stationary contact support is provided with notches evenly.

[0014] Furthermore, the outer wall of the porcelain bottle is provided with a lower lead wire fixing groove; the lower lead wire fixing seat is located in the lower lead wire fixing groove; the lower lead wire fixing groove is connected to the interior of the porcelain bottle; a positioning boss is provided in the lower lead wire fixing groove; a positioning groove is provided at the bottom of the lower lead wire fixing seat; the positioning boss is located in the positioning groove.

[0015] A fuse includes a conductive structure with a split connector and an upper lead fixing seat; an upper lead is connected inside the upper lead fixing seat; the upper lead fixing seat is located at the top of a porcelain insulator; an upper contact is provided inside the porcelain insulator; one end of the upper contact is conductively connected to the upper lead, and the other end of the upper contact is connected to the fuse tube.

[0016] The technical advantages of this invention are as follows: multiple lower stationary contacts are circumferentially assembled on the lower stationary contact copper; the side where the lower stationary contact and the lower moving contact abut are elastic, which can play a buffering role during assembly and prevent wear of the lower stationary contact caused by misalignment of the fusible tube during assembly; when a single lower stationary contact is subjected to pressure and undergoes slight deformation, the deformation will not be transmitted to the other lower stationary contacts; multiple spaced lower stationary contacts facilitate maintenance and replacement by workers, eliminating the need to replace the entire lower stationary contact and reducing maintenance costs.

[0017] In this invention, the lower stationary contact copper plate overlaps on a copper plate support platform on the lower stationary contact support member, and multiple lower stationary contacts are snapped onto the lower stationary contact copper plate to prevent the lower stationary contact copper plate from sliding downwards during long-term operation and to maintain the installation accuracy of the lower stationary contacts. The end of the lower stationary contact support member is snapped into the annular snap-fit ​​groove on the inner wall of the porcelain insulator through a snap-fit ​​section. Compared with the traditional bonding or bolt connection method, this avoids the adhesive aging and falling off or the opening of holes on the porcelain insulator surface affecting the structural strength. The lower stationary contact support member ensures the installation accuracy of the lower stationary contact copper plate and the lower stationary contacts.

[0018] This invention employs a composite assembly structure in which the lower stationary contact and the lower stationary contact copper plate are snapped together, the lower stationary contact copper plate and the copper plate support are overlapped, and the lower stationary contact support and the snap-fit ​​groove on the inner wall of the porcelain insulator are snapped together. On the one hand, during the assembly of the fusible tube and the lower moving contact, the elastic deformation of the lower stationary contact itself can compensate for the assembly errors of each component, thus preventing the lower moving contact and the lower stationary contact from being damaged by rigid contact. On the other hand, this assembly method causes less wear on each component, and since the components do not use traditional rigid connections or adhesives, it improves the service life and wear resistance of the structure. Attached Figure Description

[0019] This invention includes the following figures, the contents of which are as follows:

[0020] Figure 1 This is a cross-sectional view of the internal structure of this fuse;

[0021] Figure 2 for Figure 1Enlarged view of the structure at point A in the middle;

[0022] Figure 3 This is a cross-sectional view of the internal structure of this conductive structure;

[0023] Figure 4 for Figure 2 Schematic diagram of the middle and lower stationary contact structure;

[0024] Figure 5 for Figure 2 Schematic diagram of the support structure for the lower and middle stationary contacts;

[0025] Figure 6 for Figure 2 Cross-sectional view of the internal structure of a porcelain vase;

[0026] Figure 7 for Figure 1 Assembly drawing of the middle and lower stationary contacts and the copper plate of the lower stationary contact;

[0027] Figure 8 for Figure 1 A schematic diagram of the structure of the middle and lower lead wire fixing base.

[0028] The markings in the diagram are as follows: 1. Porcelain insulator; 101. Snap-fit ​​groove; 102. Lower lead wire fixing groove; 103. Positioning boss; 2. Base; 3. Fusible tube; 4. Lower lead wire fixing seat; 41. Positioning groove; 5. Lower lead wire; 6. Lower moving contact; 7. Lower stationary contact; 71. Connecting foot; 72. Bending foot; 73. Segmentation groove; 8. Lower stationary contact support; 81. Copper plate support platform; 82. Clearance groove; 83. Snap-fit ​​section; 84. Through hole; 85. Notch; 9. Lower stationary contact copper plate; 10. Lap piece; 11. Fixing nut; 12. Lower stationary contact insulation cover; 13. Spring; 14. Copper sleeve; 15. Upper lead wire fixing seat; 16. Upper lead wire; 17. Upper contact. Detailed Implementation

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0030] A conductive structure with separate connectors, such as Figure 1 , Figure 2 and Figure 3As shown, the device includes a porcelain insulator 1, which serves as the outer main insulating shell. The insulator 1 has a hollow cylindrical structure, isolating the internal conductive components from the external environment, resisting outdoor moisture, salt spray, and dust corrosion, and ensuring the stability of the external insulation. A base 2 is located at the bottom of the insulator 1, sealing the bottom opening of the insulator 1 to form a sealed cavity. A sealing gasket can be added between the base 2 and the insulator 1 to further improve the overall sealing effect and prevent impurities from entering the cavity from the bottom and affecting the normal operation of the internal conductive components. A fusible tube 3 is located inside the insulator 1 and the base 2, and the fusible tube 3 is vertically aligned with the insulator. The shaft is arranged inside the sealed cavity of the base 2 and the porcelain insulator 1. The fuse tube 3 is the switching element of this fuse. The fuse wire is arranged inside the fuse tube 3. Under normal operating conditions, the circuit current is conducted. The top of the fuse wire and the upper lead are conductive, and the bottom of the fuse wire and the lower lead are conductive. When a short circuit or overload fault occurs in the circuit, the fuse wire melts due to heat, cutting off the fault current and realizing circuit protection. The side wall of the base 2 is provided with a lower lead wire fixing seat 4. The lower lead wire 5 is connected in the lower lead wire fixing seat 4. The side wall of the porcelain insulator 1 has a lateral installation station for assembling the lower lead wire fixing seat 4. The lower lead wire 5 passes through the lower lead wire fixing seat 4 and the external line. The circuit and internal conductive elements are connected, and the lower lead 5 and the lower lead fixing seat 4 are locked and sealed to prevent loosening of the contact position from affecting the sealing of the internal cavity; the base 2 is provided with a lower moving contact 6, which is sleeved on the fuse tube 3 and connected to the lower lead fixing seat 4; the lower moving contact 6 and the fuse tube 3 are coaxially sleeved and maintain a synchronous axial movement relationship; the lower moving contact 6 and the lower lead 5 form a connected lower conductive branch; in the normal closed plugging state, the fuse tube 3 drives the lower moving contact 6 to move upward and contact the lower stationary contact 7 to conduct electricity, establishing a complete power supply circuit; the traditional fuse lower The connection structure between the moving contact 6 and the external lead wire often uses direct wire welding, which is prone to weld cracking over time, affecting conductivity. This structure relies on the lower stationary contact 7 and the lower moving contact 6 to establish a conductive transition structure, resulting in higher connection strength and stronger conductivity stability. The lower lead wire fixing seat 4 has a conical structure, and the conical outer wall matches the contour of the inner wall of the lower lead wire fixing groove 102, which has a guiding function during assembly and facilitates quick assembly by workers. The lower lead wire fixing seat 4 is a one-piece molded structure, avoiding splicing gaps. Moreover, the one-piece structure has high structural strength, which can avoid the risk of weld fracture that exists in the separate welded structure.

[0031] It also includes at least two lower stationary contacts 7 and a lower stationary contact support 8. The lower stationary contact support 8 is installed in the middle section of the cylindrical inner wall of the porcelain insulator 1, serving as an insulating support base. It is made of high-strength, heat-resistant insulating material to achieve electrical isolation between the conductive components and the shell of the porcelain insulator 1, preventing discharge and leakage from the shell. The lower stationary contact support 8 is provided with a lower stationary contact copper plate 9, which serves as a conductive busbar. All lower stationary contacts 7 are electrically connected to the lower stationary contact copper plate 9. The lower stationary contacts 7 and the lower stationary contact copper plate 9 are connected. One side of the lower stationary contact 7 abuts against the outer wall of the lower moving contact 6. There is a gap between two adjacent lower stationary contacts 7.

[0032] In this embodiment, traditional fuses generally use an integrated annular stationary contact, with the inner wall of the annulus tightly fitted to the outer diameter of the moving contact. If radial displacement occurs during the insertion of the fuse tube 3, the moving contact directly presses against one side of the annular contact's inner wall, easily causing plastic deformation of the copper material, scratching and peeling of the surface plating, increasing contact resistance, and affecting conductivity. This invention uses multiple spaced lower stationary contacts 7, with the side where the lower stationary contact 7 and the lower moving contact 6 abut against being elastic. This provides a buffering effect during assembly, preventing wear of the lower stationary contact 7 due to misalignment of the fuse tube 3 during assembly. The spaced-out lower stationary contacts 7 facilitate maintenance and replacement by workers, eliminating the need to replace the entire lower stationary contact and reducing maintenance costs. The fuse tube 3 is easily accessible during manual maintenance. During plug-in assembly, if a slight misalignment occurs, it will not directly and rigidly compress the body of the lower stationary contact 7. The lower stationary contacts 7, which are arranged at intervals, are separated from each other. When a single lower stationary contact 7 is compressed and undergoes a slight deformation, the deformation will not be conducted to the other lower stationary contacts 7. At the same time, if any one of the lower stationary contacts 7 is burned or worn, only the damaged lower stationary contact 7 needs to be replaced individually, without the need for complete disassembly, which reduces the later maintenance costs and disassembly workload. The multiple lower stationary contacts 7 arranged at intervals can also form a heat dissipation channel between the contacts. The heat generated by the contacts during the closing and current flow process can be diffused into the cavity through the contact gaps, reducing the temperature rise in the contact area, inhibiting high-temperature oxidation of the lower stationary contacts 7, and improving service life.

[0033] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the lower stationary contact 7 is provided with a connecting foot 71; the connecting foot 71 is located on one end of the lower stationary contact 7 and is connected to the lower stationary contact copper plate 9; the other end of the lower stationary contact 7 is provided with a bent foot 72; the bent foot 72 is bent in the direction of extension of the connecting foot 71; the lower stationary contact copper plate 9 is clamped between the connecting foot 71 and the bent foot 72; the connecting foot 71 and the bent foot 72 together form a clamping structure, and the lower stationary contact copper plate 9 is clamped between the connecting foot 71 and the bent foot 72, forming a snap-fit ​​assembly structure; when the fuse tube 3 is inserted into place upwards, the fuse completes the closing operation. Subsequently, the inner contact surface of each lower stationary contact 7 is tightly attached to the outer wall of the lower moving contact 6, and conduction is achieved by contact pressure. Multiple sets of independent lower stationary contacts 7 simultaneously contact the lower moving contact 6, dispersing the current load and avoiding local overheating caused by concentrated current at a single point. The lower stationary contact 7 has a U-shaped structure, which has good elasticity and can produce a small amount of elastic deformation after being squeezed, adaptively compensating for minor assembly deviations. The lower stationary contact 7, connecting foot 71, and bending foot 72 are integrally formed, ensuring a continuous and stable conductive path, and possessing elastic clamping performance. It will not bend or break after multiple rebounds, thus improving the service life of the structure.

[0034] In this embodiment, conventional welding fixing methods are prone to weld fatigue cracking and interruption of conductive path under long-term thermal expansion and contraction cycle conditions; bolt connection methods require opening assembly holes in the copper plate and contact body, which damages the conductive cross section, and the bolts are prone to loosening under outdoor vibration environment; this snap-fit ​​structure does not require opening holes or welding on the lower stationary contact 7 and the lower stationary contact copper plate 9. It relies on the elastic deformation of the lower stationary contact 7 metal itself to achieve assembly and fixing. During the assembly operation, the operator only needs to push the lower stationary contact copper plate 9 between the connecting foot 71 and the bent foot 72. The elasticity of the copper material generates a continuous clamping pre-tightening force to ensure that the lower stationary contact 7 and the lower stationary contact copper plate 9 are tightly attached and maintain stable conductive contact; under external vibration, the lower stationary contact 7 will not undergo axial movement or circumferential deflection, ensuring that the contact surface of the lower stationary contact 7 is always attached to the outer wall of the lower moving contact 6; the bent foot 72 has a certain buffering capacity. When the impact of the fusion tube 3 is inserted is transmitted to the lower stationary contact 7, the elastic structure absorbs the impact load and reduces the probability of deformation of the lower stationary contact 7.

[0035] Specifically, such as Figure 2 , Figure 3 and Figure 7 As shown, the lower stationary contact 7 is evenly distributed on the inner circumferential wall of the lower stationary contact copper plate 9. The even circumferential arrangement ensures that when the circuit is closed, the outer wall of the lower moving contact 6 is subjected to balanced force and evenly distributed contact pressure, avoiding the problem of excessive contact pressure on one side and poor contact on the other side. The current can be evenly distributed, eliminating the phenomenon of local current concentration and reducing the phenomenon of excessively rapid temperature rise of local contacts. The contact surface between the lower stationary contact 7 and the lower moving contact 6 is provided with a segmented groove 73. This prevents metal debris or air impurities from accumulating between the contact surfaces of the lower stationary contact 7 and the lower moving contact 6, forming an insulating isolation layer, which would lead to poor contact and affect the conductivity efficiency. The segmented groove 73 increases the heat dissipation area of ​​the contact area between the lower stationary contact 7 and the lower moving contact 6, and accelerates the dissipation of heat from the contact position.

[0036] Specifically, such as Figure 5 and Figure 7As shown, the inner wall of the lower stationary contact support 8 is provided with a copper plate support platform 81; the bottom of the lower stationary contact copper plate 9 rests on the copper plate support platform 81, forming a horizontal bearing plane. The bottom of the lower stationary contact copper plate 9 rests directly on the upper surface of the copper plate support platform 81. The copper plate support platform 81 provides vertical bearing support for the lower stationary contact copper plate 9 and the lower stationary contact 7, preventing the lower stationary contact copper plate 9 from sliding downwards during long-term operation and maintaining the accuracy of the axial installation position of the lower stationary contact 7; a clearance groove 82 is provided on one side of the lower stationary contact support 8; a connecting piece 10 is provided at the bottom of the lower stationary contact copper plate 9; a fixing nut 11 is provided on one side of the lower lead wire fixing seat 4; the lower lead wire 5 is connected to the fixing nut 11; one end of the connecting piece 10 is connected to the lower stationary contact copper plate 9, and the other end of the connecting piece 10 passes through the clearance groove. 82 is connected to the fixing nut 11, and the clearance groove 82 is reserved for the passage of the lap piece 10; the lap piece 10 and the lower stationary contact copper plate 9 are bolted together, which improves the connection strength and facilitates the installation and disassembly of workers; the lower stationary contact copper plate 9 has a ring structure, forming a complete bus circuit, which is compatible with the lower stationary contacts 7 that are evenly arranged in the circumference; the copper plate support platform 81 has a ring structure, and the ring support surface evenly supports the bottom surface of the lower stationary contact copper plate 9, dispersing the support load and avoiding local deformation of the lower stationary contact copper plate 9.

[0037] In this embodiment, it is not necessary to cut off a large area of ​​material on the lower stationary contact support 8 to ensure its overall structural strength; a hard metal lap piece 10 is used to achieve conductive transition, which avoids the problem of wire bending fatigue fracture compared with soft copper wire connection, has high vibration resistance, and is suitable for the long-term uninterrupted operation of outdoor power distribution equipment; the lap piece 10 has an L-shaped structure, which uses L-shaped bending to achieve spatial turning, passing through the avoidance groove 82, improving space utilization.

[0038] Specifically, such as Figure 1 , Figure 5 and Figure 6 As shown, the inner wall of the porcelain insulator 1 is provided with a snap-fit ​​groove 101; the outer wall of the lower stationary contact support 8 is provided with a snap-fit ​​section 83; the snap-fit ​​section 83 snaps into the snap-fit ​​groove 101; during assembly, the lower stationary contact support 8 is pushed into the cavity from the lower end of the porcelain insulator 1, and the snap-fit ​​section 83 is finally embedded in the snap-fit ​​groove 101 to form a snap-fit ​​fit; in traditional solutions, the insulating support is generally fixed by adhesive or threaded locking, the adhesive is prone to aging and delamination, and the support will fall and shift; the threaded fixing method requires machining threads on the inner wall of the porcelain insulator, which is difficult and expensive to machine, and ceramic threads are prone to breakage and damage under impact; this assembly structure does not require glue or thread machining, reducing the difficulty of porcelain insulator machining and manufacturing costs; the snap-fit ​​groove 101 and the snap-fit ​​section 83 cooperate with each other to restrict the axial movement of the lower stationary contact support 8; at the same time, the snap-fit ​​groove 101 plays a positioning role for the lower stationary contact support 8, ensuring the coaxiality of the installation of the lower stationary contact support 8 and the porcelain insulator 1, and improving the installation accuracy of the structure.

[0039] Specifically, such as Figure 2 and Figure 3 As shown, a lower stationary contact insulating cover 12 is provided above the lower moving contact 6; the lower stationary contact insulating cover 12 is fitted onto the outer wall of the fuse tube 3; the lower stationary contact insulating cover 12 and the upper end of the lower moving contact 6 abut against each other; the lower stationary contact 7 is snapped between the lower stationary contact insulating cover 12 and the lower moving contact 6; the lower stationary contact insulating cover 12 is made of insulating material and has an overall sleeve structure, coaxially fitted onto the outer wall of the fuse tube 3, and can move axially synchronously with the fuse tube 3; the lower stationary contact insulating cover 12 presses the lower stationary contact 7 from above to prevent the lower stationary contact 7 from moving upward and falling off, ensuring the lower moving contact 6 moves upward and falls off. The stationary contact 7 is stably connected to the lower stationary contact copper plate 9; at the same time, the lower stationary contact insulation cover 12 has an electrical isolation protection function: when the fuse is in the open state, the fuse tube 3 falls downward, the lower moving contact 6 disengages from the lower stationary contact 7, and the lower stationary contact insulation cover 12 isolates the live parts of the lower stationary contact 7 from the lower cavity space, preventing the live contact from discharging to the lower base 2, spring 13 and other components, and improving the insulation effect inside the cavity; the lower stationary contact insulation cover 12 moves synchronously with the fuse tube 3, and after the fuse is opened and blown, the lower stationary contact insulation cover 12 still maintains the isolation protection effect.

[0040] In this embodiment, the lower stationary contact copper plate 9, the fuse tube 3, the lower moving contact 6, the lower stationary contact support 8, and the lower stationary contact insulating cover 12 are all coaxially arranged. The coaxial arrangement can reduce the degree of eccentricity during the movement of the fuse tube 3 and ensure the coaxiality of the fuse tube 3. When the fuse tube 3 is inserted, the outer wall of the lower moving contact 6 can synchronously and evenly contact each lower stationary contact 7, ensuring balanced contact pressure. If the components are not coaxial, the movement of the fuse tube 3 will be continuously eccentric, squeezing the lower stationary contact 7 on one side, accelerating the wear of the lower stationary contact 7, and causing uneven distribution of contact resistance, affecting conductivity and assembly accuracy.

[0041] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, a spring 13 is also fitted on the outer wall of the fuse tube 3, and the spring 13 is located below the lower moving contact 6; the upper end of the spring 13 abuts against the bottom surface of the lower moving contact 6; a copper sleeve 14 is fitted at the bottom of the fuse tube 3; the lower end of the spring 13 abuts against the copper sleeve 14; under normal closing conditions, the fuse tube 3 is inserted upwards into place, the fuse wire remains in a fully tensioned state, and the fuse tube 3 is maintained in the upper closing position. At this time, the spring 13 is bidirectionally squeezed by the lower moving contact 6 and the copper sleeve 14, and the spring 13 is continuously in a compressed state; when an overload or short circuit fault occurs in the line, the fuse wire inside the fuse tube 3 melts due to heat, the upward pulling force of the fuse wire on the fuse tube 3 disappears, and the spring 13 is no longer constrained. Spring 13 pushes the lower moving contact 6 downwards, which acts on the bottom of the fuse tube 3 through the copper sleeve 14. This drives the fuse tube 3 to quickly pop out a short distance along the axis, so that the fuse tube 3 quickly disengages from the lower stationary contact 7, cutting off the fault current circuit. The lower end of the fuse tube 3 extends downwards outside the base 2, indicating that the fuse has blown internally. Outdoor inspection personnel can then determine that the fuse has blown without having to shut down the power and disassemble the equipment to troubleshoot the fault. The copper sleeve 14 is located between the lower end of the spring 13 and the end of the fuse tube 3. The copper sleeve has higher hardness and better wear resistance, preventing the end of the spring 13 from directly squeezing the non-metallic outer shell of the fuse tube and preventing long-term repeated squeezing from causing the end of the fuse tube 3 to crack.

[0042] In this embodiment, during the ejection of the fuse tube 3, the lower moving contact 6 disengages from the multi-component separate lower stationary contact 7. The spaced arrangement of the lower stationary contact 7 facilitates the rapid extinguishing of the arc and reduces the risk of reignition during the breaking process.

[0043] Specifically, such as Figure 5 As shown, the lower stationary contact support 8 has a through hole 84; the fuse tube 3 and the lower moving contact 6 pass through the through hole 84; the inner diameter of the through hole 84 is larger than the outer diameter of the lower moving contact 6, and the fuse tube 3 and the lower moving contact 6 fixed to the outside of the fuse tube pass vertically through the through hole 84 as a whole, ensuring that the fuse tube 3 can move up and down along the axis of the through hole 84; the inner wall edge of the through hole 84 is provided with a smooth transition rounded corner to prevent the edges of the fuse tube 3 from scratching and wearing the outer wall coating of the lower moving contact 6 during the up and down sliding process; a large amount of high temperature and high pressure gas is generated at the moment the fuse wire melts. The jet-type fuse extinguishes the electric arc by blowing out the internal airflow. The notch 85 provides an airflow channel to balance the air pressure inside the cavity, and the notch 85 also forms a heat dissipation channel. The heat generated by the lower stationary contact 7 can be diffused through the notch 85 to balance the temperature distribution inside the cavity. The lower stationary contact support 8 is provided with notches 85 evenly to ensure that the structural strength of the lower stationary contact support 8 is uniform in all directions, and there will be no weak points on one side. This avoids cracking and deformation due to uneven stress and improves the service life of the lower stationary contact support 8.

[0044] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 8As shown, the outer wall of the porcelain bottle 1 is provided with a lower lead wire fixing groove 102; the lower lead wire fixing seat 4 is located in the lower lead wire fixing groove 102; the lower lead wire fixing groove 102 is connected to the interior of the porcelain bottle 1; a positioning boss 103 is provided in the lower lead wire fixing groove 102; a positioning groove 41 is provided at the bottom of the lower lead wire fixing seat 4; the positioning boss 103 is located in the positioning groove 41; this positioning structure restricts the circumferential rotation and radial displacement of the lower lead wire fixing seat 4; the positioning boss 103 and the positioning groove 41 are in a concave-convex fit, improving the contact surface fit between the lower lead wire fixing seat 4 and the porcelain bottle 1, preventing rainwater and impurities from entering the inner cavity of the porcelain bottle 1 along the assembly gap between the lower lead wire fixing seat 4 and the porcelain bottle 1, thus protecting the porcelain bottle 1. The internal insulation environment of the cavity is stable; the positioning structure enables rapid alignment and assembly. During assembly, workers can quickly find the correct installation angle, improving assembly efficiency and avoiding misalignment that could cause the lower lead wire 5 to twist; both the positioning boss 103 and the positioning groove 41 are annular structures, providing stronger assembly tolerance and uniform force distribution due to the annular concave-convex fit; the outer wall of the snap-fit ​​section 83, the inner wall of the snap-fit ​​groove 101, the outer wall of the positioning boss 103, and the inner wall of the positioning groove 41 are all equipped with rounded corner structures. The rounded corners eliminate sharp edges, preventing metal debris from being generated by the sharp edges rubbing against each other during assembly, while also relieving stress concentration and preventing chipping and cracking of the ceramic bottle 1 and metal parts due to impact.

[0045] This invention includes a fuse comprising the aforementioned conductive structure, such as... Figures 1 to 8 As shown, the fuse includes an upper lead fixing base 15; an upper lead 16 is connected inside the upper lead fixing base 15; the upper lead fixing base 15 is located at the top of the porcelain insulator 1; an upper contact 17 is provided inside the porcelain insulator 1; one end of the upper contact 17 is electrically connected to the upper lead 16, and the other end of the upper contact 17 is electrically connected to the fuse tube 3; through the above structural arrangement, a complete conductive path is formed inside the fuse: the external circuit is connected through the upper lead 16, and sequentially passes through the upper contact 17, the fuse tube 3, the lower moving contact 6, the separately arranged lower stationary contact 7, the lower stationary contact copper plate 9, the lap piece 10 and the fixing nut 11, and finally leads outward through the lower lead 5, forming a closed conductive circuit of the entire fuse.

[0046] The unique structural features and assembly method of the lower stationary contact 7 and the lower stationary contact support 8 of this invention reduce wear on the lower stationary contact 7 during assembly and improve the service life of the structure. By using multiple spaced lower stationary contacts 7 and lower stationary contact copper plates 9 for interlocking, the lower stationary contact 7 utilizes its own elastic deformation to buffer the rigid impact generated by the fusible tube 3 and the lower moving contact 6 during installation, compensating for assembly gaps between components, improving assembly accuracy and the service life of the structure. Furthermore, the interlocking structure facilitates disassembly and assembly; workers do not need to replace the entire lower stationary contact 7, but only the individual lower stationary contact 7 requiring maintenance, reducing maintenance costs and assembly time. The copper plate support platform 81 provided on the contact support 8 provides a support surface and installation reference for the lower stationary contact copper plate. The snap-fit ​​section on the outer wall of the lower stationary contact support 8 and the snap-fit ​​groove 101 inside the porcelain insulator snap-fit ​​together. Compared with the traditional rigid connection method or adhesive method, it has a longer service life, more stable assembly, less wear on components, lower cost, shorter assembly time, and higher production efficiency. The connection method and structural features of the lower stationary contact 7, the lower stationary contact support 8, and the lower stationary contact copper plate 9 together achieve the effect of reducing the wear on components such as the lower stationary contact 7, increasing the service life of the structure, and reducing the maintenance cost of the structure.

[0047] The working process of this invention is as follows: The operator pushes the fuse tube 3 upward from the opening position of the base 2. The fuse tube 3 carries the lower moving contact 6, the lower stationary contact insulating cover 12, and the copper sleeve 14 upward simultaneously. During the upward pushing process, the lower moving contact 6 gradually passes through the through hole 84 at the center position of the lower stationary contact support 8 and continues to move upward. After the outer wall of the lower moving contact 6 contacts the inner arc surface of multiple sets of circumferentially arranged split lower stationary contacts 7, an upward pushing force is continued to be applied. The lower moving contact 6 continues to slide upward along the arc surface of the lower stationary contact 7, pushing the fuse tube 3 to the final closing position. The lower stationary contact insulating cover 12 restricts the lower stationary contact 7 from moving upward, ensuring that the lower stationary contact 7 stably fits against the outer wall of the lower moving contact 6. After being pushed into place, the fuse wire inside the fuse tube 3 is tensioned and fixed, locking the fuse tube in the upper closing position. At this time, the spring 13 is pressed by the bottom surface of the lower moving contact 6 and the bottom copper sleeve 14 of the fuse tube 3. The external circuit is connected via the upper lead 16, and then passes through the upper contact 17, fuse tube 3, lower moving contact 6, lower stationary contact 7 (split arrangement), lower stationary contact copper plate 9, lap joint 10 and fixing nut 11 in sequence. Finally, the current is led outward through the lower lead 5 to form a complete fuse conductive circuit.

[0048] In this embodiment, the multiple spaced lower stationary contacts 7 facilitate worker maintenance and replacement. When a lower stationary contact 7 needs to be replaced, it is not necessary to replace the entire lower stationary contact 7; only a single lower stationary contact 7 needs to be replaced, reducing maintenance costs and disassembly / reassembly time. During the insertion and pushing process, if the fuse tube 3 has a slight radial eccentricity, the lower moving contact 6 will squeeze one side of the lower stationary contact 7. The elastic deformation of the lower stationary contact 7 itself can absorb the offset, preventing rigid scraping. The lower stationary contact 7 relies on its own elastic structure to finely adjust the contact posture, ensuring that multiple sets of lower stationary contacts 7 make synchronous contact and conduction. When an overload or short circuit fault occurs in the power distribution line, the circuit current increases sharply, and the fuse inside the fuse tube 3 generates a large amount of heat. When the current reaches the melting point, the fuse blows. After the fuse breaks, it no longer provides upward tension. The spring 13, which was originally in a compressed state, rebounds. The upper end of the spring 13 pushes the lower moving contact 6 upward, and the lower end of the spring applies a downward thrust to the fuse tube 3 through the copper sleeve 14. This drives the fuse tube 3, the lower moving contact 6, and the lower stationary contact insulation cover 12 to slide rapidly downward along the axis. The lower moving contact 6 disengages from the split lower stationary contact 7, the conductive circuit is cut off, and the fault current is isolated. The fuse tube 3 continues to pop out downward for a designed stroke, and the lower end of the fuse tube 3 extends outside the base 2. Maintenance personnel can visually observe the extended state of the fuse tube 3 during ground inspections and determine that the fuse has blown.

[0049] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A conductive structure with a split connector, characterized in that: The device includes a porcelain bottle (1); a base (2) is provided at the bottom of the porcelain bottle (1); a melting tube (3) is provided inside the porcelain bottle (1) and the base (2); a lower lead wire fixing seat (4) is provided on the side wall of the base (2), and a lower lead wire (5) is connected inside the lower lead wire fixing seat (4); a lower moving contact (6) is provided inside the base (2); the lower moving contact (6) is sleeved on the melting tube (3), and the lower moving contact (6) is connected to the lower lead wire fixing seat (4); It also includes at least two lower stationary contacts (7) and a lower stationary contact support (8), the lower stationary contact support (8) being disposed on the inner wall of the porcelain bottle (1); a lower stationary contact copper plate (9) is disposed on the lower stationary contact support (8); the lower stationary contact (7) and the lower stationary contact copper plate (9) are connected; one side of the lower stationary contact (7) abuts against the outer wall of the lower moving contact (6).

2. The conductive structure with a split connector according to claim 1, characterized in that: The lower stationary contact (7) is provided with a connecting foot (71); the connecting foot (71) is located on one end of the lower stationary contact (7), and the connecting foot (71) is connected to the lower stationary contact copper plate (9); the other end of the lower stationary contact (7) is provided with a bent foot (72); the bent foot (72) is bent in the direction of extension of the connecting foot (71); the lower stationary contact copper plate (9) is sandwiched between the connecting foot (71) and the bent foot (72).

3. A conductive structure with a split connector according to claim 2, characterized in that: The lower stationary contact (7) is evenly distributed on the inner wall of the lower stationary contact copper plate (9); the contact surfaces of the lower stationary contact (7) and the lower moving contact (6) are provided with segmented grooves (73).

4. A conductive structure with a split connector according to claim 3, characterized in that: The lower stationary contact support member (8) has a copper plate support platform (81) on its inner wall; the lower stationary contact copper plate (9) is supported on the copper plate support platform (81) at its bottom; the lower stationary contact support member (8) has a relief groove (82) on one side; the lower stationary contact copper plate (9) has a lap piece (10) at its bottom; the lower lead wire fixing seat (4) has a fixing nut (11) on one side; the lower lead wire (5) is connected to the fixing nut (11); one end of the lap piece (10) is connected to the lower stationary contact copper plate (9), and the other end of the lap piece (10) passes through the relief groove (82) and is connected to the fixing nut (11).

5. A conductive structure with a split connector according to claim 4, characterized in that: The inner wall of the porcelain bottle (1) is provided with a snap-fit ​​groove (101); the outer wall of the lower stationary contact support (8) is provided with a snap-fit ​​section (83); the snap-fit ​​section (83) is snapped into the snap-fit ​​groove (101).

6. A conductive structure with a split connector according to claim 5, characterized in that: A lower stationary contact insulating cover (12) is provided above the lower moving contact (6); the lower stationary contact insulating cover (12) is fitted on the outer wall of the fusible tube (3); the lower stationary contact insulating cover (12) and the upper end of the lower moving contact (6) abut against each other; the lower stationary contact (7) is snapped between the lower stationary contact insulating cover (12) and the lower moving contact (6).

7. A conductive structure with a split connector according to claim 6, characterized in that: A spring (13) is also fitted on the outer wall of the molten tube (3), and the spring (13) is located below the lower moving contact (6); the upper end of the spring (13) abuts against the bottom surface of the lower moving contact (6); a copper sleeve (14) is fitted on the bottom of the molten tube (3); the lower end of the spring (13) abuts against the copper sleeve (14).

8. A conductive structure with a split connector according to claim 7, characterized in that: The lower stationary contact support (8) is provided with a through hole (84); the fusible tube (3) and the lower moving contact (6) pass through the through hole (84); the lower stationary contact support (8) is provided with notches (85) evenly.

9. A conductive structure with a split connector according to claim 8, characterized in that: The outer wall of the porcelain bottle (1) is provided with a lower lead wire fixing groove (102); the lower lead wire fixing seat (4) is located in the lower lead wire fixing groove (102); the lower lead wire fixing groove (102) and the interior of the porcelain bottle (1) are connected; the lower lead wire fixing groove (102) is provided with a positioning boss (103); the bottom of the lower lead wire fixing seat (4) is provided with a positioning groove (41); the positioning boss (103) is located in the positioning groove (41).

10. A fuse, characterized in that: The conductive structure includes a split connector and an upper lead fixing seat (15) as described in any one of claims 1 to 9; an upper lead (16) is connected inside the upper lead fixing seat (15); the upper lead fixing seat (15) is located at the top of the porcelain bottle (1); an upper contact (17) is provided inside the porcelain bottle (1); one end of the upper contact (17) is electrically connected to the upper lead (16), and the other end of the upper contact (17) is connected to the fusible tube (3).

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