Fuse for high-voltage power distribution system

Abstract

The invention provides a fuse for a high-voltage power distribution system and a conductive melt replacement method thereof, and relates to the technical field of power equipment.The fuse is characterized in that an upper insulating seat, a lower insulating seat and an insulating protective cover plate are mounted on a mounting bottom plate of the fuse, and an upper conductive block and a lower conductive block are fixed to the inner wall of the insulating protective cover plate; a first elastic piece is arranged between the upper insulating seat and the lower insulating seat, the lower end of the conductive melt is fixed on the lower insulating seat, the upper end of the conductive melt is provided with a mounting hole, the upper insulating seat is provided with a telescopic clamping rod, and the end part of the telescopic clamping rod is inserted into the mounting hole. The fuse has the beneficial effects that when the conductive melt is overloaded and fused, the first elastic piece can quickly push away the upper insulating seat and the lower insulating seat to ensure an enough fracture distance, so that the fuse can be quickly powered off to prevent electric arcs from being generated after the conductive melt is fused, the overload hazard is reduced, and the service life of the fuse is prolonged. Moreover, the fuse has the advantage of quick replacement when the conductive melt is replaced, and the power-off loss of a high-voltage power distribution system can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to a fuse for a high-voltage power distribution system and a method for replacing a conductive fuse element thereof. BACKGROUND

[0002] As a core link of power transmission and distribution, the reliability of a high-voltage power distribution system directly affects industrial production, residential electricity and power grid safety. As an important overcurrent protection device in the high-voltage power distribution system, a fuse cuts off a fault current by fusing a conductive fuse element, and is a key device for ensuring system safety.

[0003] A fuse disclosed in Chinese Patent No. 200910216957.9 includes a hollow fuse tube, an upper fixed part mounted at an upper end of the fuse tube, a lower fixed part provided at a lower end of the fuse tube, a fuse fixed frame hingedly connected to the lower fixed part, a fuse provided in the fuse tube, an upper end of the fuse electrically connected to the upper fixed part, a lower end of the fuse electrically connected to the fuse fixed frame, and a transparent auxiliary fuse tube fixedly provided at the lower end of the fuse tube and fixedly connected to the lower fixed part. An observation block corresponding to the position of the auxiliary fuse tube is sleeved on the fuse. A protection tube sleeving the fuse is provided in the inner cavity of the auxiliary fuse tube, and a clamping part is provided at the lower end of the fuse tube and clamped with the upper end of the protection tube. The clamping part is a clamping table or a groove. The fuse with such a structure is simple in structure, can quickly determine whether the fuse is fused, and enables maintenance personnel to quickly determine whether the fuse needs to be replaced without climbing.

[0004] The existing fuse is mostly a drop-out fuse, which is usually arranged in high altitude or outdoors, and usually needs a large space, and is not suitable for indoor or relatively small structural space environments (such as power distribution systems in subway stations and high-speed rail stations). However, the existing indoor fuse cannot guarantee that the conductive fuse element has sufficient gap distance after being fused, and the conductive fuse element is still live after being fused, which may cause an arc under high-voltage conditions, and the high temperature and discharge of the arc may cause greater harm to the high-voltage power distribution system. Moreover, the existing fuse is mostly directly fixed on a conductor by a bolt fastening method, which has the disadvantage of poor shock resistance. After the conductive fuse element is fused, the external parts of the fuse need to be disassembled, the fused conductive fuse element on the live conductor needs to be removed, and a new conductive fuse element needs to be replaced. The operation process needs live working, which is complex, time-consuming and dangerous, and thus prolongs the power-off time of the power distribution system and increases the risk of replacing the conductive fuse element. Therefore, there is an urgent need for a fuse for a high-voltage power distribution system, which is reliable in connection, quick in power-off, and convenient and safe in replacement of the conductive fuse element. SUMMARY

[0005] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide a fuse for high-voltage distribution system and a method for replacing the conductive melt of the fuse. When the conductive melt of the fuse is overloaded, the heat generated by the heat generation can melt the conductive melt at the melting portion, and the first elastic member of the fuse can quickly push the upper and lower insulating seats apart, so that the fuse can quickly cut off the power to prevent the conductive melt from producing arc after melting, and reduce the harm of overload of the high-voltage distribution system. The fuse does not need to disassemble the remaining parts except the lower broken part of the original conductive melt when replacing the conductive melt, which can greatly simplify the replacement process of the conductive melt of the fuse, improve the safety of the replacement of the fuse, shorten the replacement time of the conductive melt of the fuse and the power-on time of the fuse, and reduce the power loss of the high-voltage distribution system. The fuse can ensure the reliability of the electrical connection of the conductive melt, and avoid the problem of increased contact resistance or poor contact caused by vibration or thermal expansion and contraction of the traditional rigid connection of the conductive melt. The slide seat driving assembly can move the operating part away from the live conductive block, improve the safety of the conductive melt, and further improve the efficiency of the replacement of the conductive melt of the fuse.

[0006] The above technical purpose of the present application is realized by the following technical scheme: a fuse for high-voltage distribution system, comprising a shell, a conductive melt and a slide seat driving assembly; The installation base plate is fixedly arranged in the shell, the installation base plate is provided with a sliding groove, the front surface of the installation base plate is fixedly provided with an insulating protective cover plate, and the inner wall of the insulating protective cover plate is fixedly provided with an upper conductive block and a lower conductive block; the upper conductive block and the lower conductive block are used for connecting high-voltage lines; The shell is provided with an upper insulating seat and a lower insulating seat, the upper insulating seat and the lower insulating seat are provided with sliding clamping blocks, the two sliding clamping blocks are slidingly arranged in the sliding groove, so that the upper insulating seat and the lower insulating seat are arranged on the installation base plate in a relative sliding manner; the first elastic member is arranged between the upper insulating seat and the lower insulating seat; The lower insulating seat is provided with a clamping block, and the lower end of the conductive melt is clamped on the clamping block; the upper end of the conductive melt is further fixedly provided with a mounting hole, the mounting hole is further provided with a melting gap, the melting gap forms a melting portion on the conductive melt, and the upper end of the conductive melt is provided with a guide wedge surface; The upper insulating seat is fixedly provided with an upper mounting box, the upper mounting box is provided with a telescopic clamping rod and a second elastic member, the end of the telescopic clamping rod pushed by the second elastic member extends out of the upper mounting box and is inserted into the mounting hole of the conductive melt, and the upper and lower ends of the conductive melt are respectively attached to the upper conductive block and the lower conductive block; The slide seat driving assembly is used for driving the upper insulating seat and the lower insulating seat to approach each other.

[0007] Further, the upper mounting box is provided with a telescopic sleeve, and the telescopic clamping rod is slidingly arranged in the telescopic sleeve; The telescopic clamping rod is provided with a limiting ring, the second elastic member is sleeved on the telescopic clamping rod, and the two ends of the second elastic member abut against the bottom of the upper mounting box and the limiting ring respectively.

[0008] Further, the telescopic clamping rod is provided with a sliding limiting rod in the middle part, the telescopic clamping rod is provided with a pressing push plate, the pressing push plate is provided with a push plate hole, the sliding limiting rod passes through the push plate hole to slide the pressing push plate on the sliding limiting rod, and the telescopic clamping rod is provided with a third elastic member. The telescopic clamping rod is further sleeved with a third elastic member, the two ends of the third elastic member abut against the upper mounting box and the pressing push plate respectively, and the pressing push plate presses the upper end of the conductive melt on the upper conductive block.

[0009] Further, the clamping block is provided with a clamping threaded hole, the clamping threaded hole is provided with a clamping screw, the lower end of the conductive melt is provided with a locking hole, and the clamping screw locks the lower end of the conductive melt on the clamping block.

[0010] Further, the clamping threaded hole is a hexagonal socket head cap screw, and the locking hole is a counterbore.

[0011] Further, the lower insulating base is provided with a lower mounting box, the lower mounting box is provided with an expansion hole, the end of the clamping block is provided with a limiting seat, the limiting seat is slidably arranged in the lower mounting box, the clamping block extends to the outside of the lower mounting box through the expansion hole, and a plurality of V-shaped elastic sheets are fixed in the lower mounting box.

[0012] Further, the two sliding clamping blocks are respectively provided with supporting sliding blocks and sliding drive rods, the sliding drive rod connected with the upper insulating base is an upper drive rod, the sliding drive rod connected with the lower insulating base is a lower drive rod, and the drive rod connected with the upper drive rod is a lower drive rod. The sliding seat drive assembly comprises a rotating sleeve, a drive shaft and a drive disc. The rotating sleeve is fixed on the mounting bottom plate, the drive shaft is rotatably arranged in the rotating sleeve, the drive disc is fixed on the end of the drive shaft, the drive disc is wound with a drive rope, one end of the drive rope is fixed on the drive disc, and the other end of the drive rope is wound around the rotating pulley and fixed on the lower drive rod.

[0013] Further, the end of the drive shaft is further provided with a limiting cap, and the limiting cap is further provided with a drive rod.

[0014] Further, the sliding groove is further provided with a limiting block in the middle part, the limiting block divides the sliding groove into an upper sliding groove and a lower sliding groove, the sliding clamping block on the upper insulating base is slidably arranged in the upper sliding groove, and the sliding clamping block on the lower insulating base is slidably arranged in the lower sliding groove.

[0015] The application also provides a method for replacing the conductive melt of the fuse, which is used in the fuse of the high-voltage power distribution system, and the method comprises the following steps; S1: the overload heating of the conductive melt causes the fracture of the melt breaking part; the first elastic member simultaneously pushes the upper and lower insulating bases to move upwards and downwards along the sliding grooves to the upper and lower ends of the sliding grooves, so as to quickly separate the fractured conductive melt; S2: the third elastic member pushes the compression push plate to move outwards along the sliding limiting rod, so that the compression push plate pushes the upper fractured part of the conductive melt outwards, and the upper fractured part of the movable conductive melt is separated from the telescopic clamping rod; S3: the lower fractured part of the conductive melt on the clamping block is removed, and the lower end of the new conductive melt is fixed on the clamping block; S4: the upper and lower insulating bases are driven to move upwards and downwards respectively by the sliding seat driving assembly, so that the upper and lower insulating bases approach each other; during the approaching process of the upper and lower insulating bases, the upper end of the new conductive melt is first pressed against the telescopic clamping rod to retract, and then the mounting hole of the conductive melt is moved to be aligned with the telescopic clamping rod, the telescopic clamping rod is inserted into the mounting hole after rebounding, and the compression push plate is pressed against the upper end of the conductive melt on the upper conductive block under the action of the third elastic member.

[0016] The fuse for the high-voltage power distribution system has the following advantages: (1) the mounting bottom plate of the shell of the fuse is slidably provided with an upper insulating base and a lower insulating base, the outer sides of the upper and lower insulating bases are provided with insulating protective cover plates, the inner walls of the insulating protective cover plates are fixed with upper and lower conductive blocks, the first elastic member is arranged between the upper and lower insulating bases, the lower end of the conductive melt is fixed on the lower insulating base, the upper end of the conductive melt is provided with a mounting hole, the telescopic clamping rod is arranged on the upper insulating base, and the end of the telescopic clamping rod is inserted into the mounting hole, so that the conductive melt can be mounted on the upper and lower insulating bases, and the upper and lower insulating bases can press the conductive melt against the upper and lower conductive blocks, respectively, so that the conductive melt can conduct the upper and lower conductive blocks. When the conductive melt is overloaded, the heat generated by the conductive melt can melt the conductive melt at the melt breaking part, at this time, the conductive melt is fractured into upper and lower fractured parts, the first elastic member can quickly push the upper and lower insulating bases apart to ensure that the upper and lower fractured parts have sufficient fracture spacing, so that the fuse can quickly cut off the power to prevent the conductive melt from generating arc after melting, and reduce the harm of the overload of the high-voltage power distribution system.

[0017] (2) After the conductive fuse melts, the first elastic member can quickly push the upper and lower broken parts away and slide out of the insulating protective cover plate with the upper and lower insulating seats. The upper and lower broken parts of the conductive fuse are separated from the upper and lower conductive blocks, and the extension clamping rod on the upper insulating seat is further provided with a pressing push plate. The third elastic member is provided between the pressing push plate and the upper mounting box. The third elastic member quickly pushes the upper broken part on the extension clamping rod away through the pressing push plate, so as to ensure that the high-temperature upper broken part is quickly and automatically separated, prevent the high temperature of the upper broken part from damaging the upper insulating seat and other components, and avoid the problem that the high-temperature upper broken part needs to be manually removed during the replacement of the conductive fuse. When replacing the new conductive fuse, the lower broken part of the clamping block is first removed, and then the lower end of the new conductive fuse is installed on the clamping block. The upper and lower insulating seats are driven to approach each other by the sliding seat driving assembly to reset. During the resetting process of the upper and lower insulating seats, the outer side of the new conductive fuse first contacts the lower conductive block, and then the guide wedge surface at the upper end of the conductive fuse drives the extension clamping rod to retract. After the upper end of the new conductive fuse continues to move upward to the mounting hole of the conductive fuse and is aligned with the extension clamping rod, the extension clamping rod can be inserted into the mounting hole of the new conductive fuse. At this time, the replacement of the conductive fuse is completed. When replacing the conductive fuse, the fuse does not need to disassemble the remaining components except the lower broken part of the original conductive fuse. The fuse can greatly simplify the replacement process of the conductive fuse, improve the safety of replacing the fuse, shorten the replacement time of the conductive fuse of the fuse and the power-on time of the fuse, and reduce the power loss of the high-voltage power distribution system.

[0018] (3) The extension clamping rod of the upper insulating seat of the fuse is provided with a third elastic member and a pressing push plate. After the conductive fuse is installed, the third elastic member can press the upper end of the conductive fuse on the upper conductive block through the pressing push plate. The lower insulating seat is provided with a lower mounting box, and the lower mounting box is provided with an extension hole. The end of the clamping block is provided with a limiting seat, and the limiting seat is slidingly arranged in the lower mounting box. The clamping block extends to the outside of the lower mounting box through the extension hole. A plurality of V-shaped elastic sheets are fixed in the lower mounting box. After the conductive fuse is installed, the V-shaped elastic sheets can slightly extrude the clamping block, so that the lower end of the conductive fuse is pressed on the lower conductive block. After the conductive fuse is installed, the upper and lower ends of the conductive fuse are elastically installed on the upper and lower insulating seats, respectively. The third elastic member and the V-shaped elastic sheet are used to elastically press the conductive fuse on the upper and lower conductive blocks, so as to ensure the reliability of the electrical connection of the conductive fuse and avoid the problem that the contact resistance increases or the contact is poor due to vibration or thermal expansion and contraction caused by the rigid connection of the traditional conductive fuse.

[0019] (4) The mounting base of the fuse is provided with a sliding seat driving assembly, the sliding seat driving assembly comprises a rotating sleeve, a driving rotating shaft and a driving rotating disc, the upper and lower insulating seats are connected with the upper and lower driving rods respectively, and the end of the upper driving rod is provided with a rotating pulley; the rotating sleeve is fixed on the mounting base, the driving rotating shaft is rotatably arranged in the rotating sleeve, the driving rotating disc is fixed on the end of the driving rotating shaft, a driving rope is wound on the driving rotating disc, one end of the driving rope is fixed on the driving rotating disc, the other end of the driving rope is wound around the rotating pulley and fixedly connected with the lower driving rod, and the length of the part of the driving rope that is not wound on the driving rotating disc can be shortened by rotating the driving rotating shaft; the upper and lower insulating seats are conveniently driven to approach each other by the pulling force of the driving rope, the installation of the conductive melt and the re-energization of the fuse are realized, the sliding seat driving assembly can make the operating part away from the conductive block, the safety of the conductive melt is improved, and the efficiency of replacing the conductive melt of the fuse is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the front overall structure of a front face of a fuse for a high-voltage power distribution system.

[0021] Figure 2 is a schematic diagram of the back overall structure of a back face of a fuse for a high-voltage power distribution system.

[0022] Figure 3 is a schematic diagram of an explosion structure of a fuse for a high-voltage power distribution system.

[0023] Figure 4 is a schematic diagram of a first local structure of a fuse for a high-voltage power distribution system.

[0024] Figure 5 is Figure 4 is an enlarged view of A in FIG.

[0025] Figure 6 is a schematic diagram of a second local structure of a fuse for a high-voltage power distribution system.

[0026] Figure 7 is a schematic diagram of an installation structure of a conductive melt of a fuse for a high-voltage power distribution system.

[0027] Figure 8 is an embodiment of the present application Figure 7 is an enlarged view of B in FIG.

[0028] Figure 9 is an enlarged view of C in FIG. Figure 7

[0029] Figure 10 ​is a flow chart of a method for replacing a conductive fuse element of a fuse.

[0030] In the above figure: 100 - outer shell, 101 - mounting base plate, 102 - upper sliding groove, 103 - lower sliding groove, 200 - insulating protective cover plate, 201 - insulating mounting plate, 202 - upper conductive block, 203 - lower conductive block, 300 - upper insulating seat, 310 - upper mounting box, 311 - telescopic sleeve body, 312 - telescopic clamping rod, 313 - limiting ring, 314 - second elastic element, 315 - sliding limiting rod, 316 - pressing push plate, 317 - third elastic element, 320 - upper supporting sliding block, 321 - upper sliding clamping block, 322 - upper driving rod, 323 - rotating pulley, 400 - lower insulating seat, 410 - lower mounting box, 411 - clamping block, 412 - limiting seat, 413 - V-shaped elastic sheet, 414 - clamping threaded hole, 415 - clamping screw, 420 - lower supporting sliding block, 421 - lower sliding clamping block, 422 - lower driving rod, 500 - conductive fuse element, 501 - fusing part, 502 - mounting hole, 503 - locking hole, 600 - first elastic element, 700 - rotating sleeve, 701 - driving shaft, 702 - driving turntable, 703 - limiting cap, 704 - driving rod, 800 - driving rope. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application clearer, the following will further describe the present application with examples. Of course, the specific examples described here are only used to explain the present application, and are not used to limit the present application.

[0032] The steps in the present application are arranged with labels, but are not used to limit the sequence of the steps, unless the sequence of the steps is explicitly described or the execution of a step needs other steps as a basis, otherwise the relative sequence of the steps can be adjusted. It can be understood that the term "and / or" used in the present application relates to and covers any and all possible combinations of one or more of the associated listed items.

[0033] Please refer to Figures 1 to 10 The present application is a fuse for high-voltage power distribution system, comprising an outer shell 100, a conductive fuse element 500 and a sliding seat driving assembly; wherein the outer shell 100 is a rectangular box body, and the front and back thereof are respectively provided with a closing door and a back plate (the closing door and the back plate are not drawn).

[0034] The rectangular mounting base plate 101 is fixedly arranged in the outer shell 100, and a sliding groove is arranged on the mounting base plate 101. An insulating protective cover plate 200 is fixedly arranged on the front surface of the mounting base plate 101, and the insulating protective cover plate 200 comprises an insulating mounting plate 201 and two mounting side plates. The two mounting side plates fix the insulating mounting plate 201 on the mounting base plate 101. An upper conductive block 202 and a lower conductive block 203 are fixedly arranged on the inner wall of the insulating mounting plate 201. Both the upper conductive block 202 and the lower conductive block 203 are used for connecting a high-voltage line. The high-voltage line can pass through the mounting side plates and be connected to the upper conductive block 202 and the lower conductive block 203. The connection structure of the upper conductive block 202 and the lower conductive block 203 with the high-voltage line is a prior art, and the structure will not be described in detail here.

[0035] The upper insulating seat 300 and the lower insulating seat 400 are arranged in the outer shell 100. Both the upper insulating seat 300 and the lower insulating seat 400 are provided with sliding clamping blocks, and the two sliding clamping blocks are slidingly arranged in the sliding groove, so that the upper insulating seat 300 and the lower insulating seat 400 are slidingly arranged on the mounting base plate 101 in a relative up-down manner. Specifically, the upper insulating seat 300 is provided with an upper supporting sliding block 320. A limiting block is further arranged in the middle of the sliding groove, and the limiting block divides the sliding groove into an upper sliding groove 102 and a lower sliding groove 103 arranged in a same line. The sliding clamping block on the upper insulating seat 300 is an upper sliding clamping block 321, which is fixedly arranged on the upper supporting sliding block 320 and slidingly arranged in the upper sliding groove 102. The sliding clamping block on the lower insulating seat 400 is a lower sliding clamping block 421, which is fixedly arranged on a lower supporting sliding block 420 and slidingly arranged in the lower sliding groove 103. A first elastic member 600 is arranged between the upper insulating seat 300 and the lower insulating seat 400.

[0036] The lower insulating seat 400 is provided with a clamping block 411, and the lower end of the conductive melt 500 is clamped on the clamping block 411. The upper end of the conductive melt 500 is further provided with a mounting hole 502, and the mounting hole 502 is further provided with a melting gap. The melting gap forms a melting portion 501 on the conductive melt 500. The cross-sectional area of the melting portion 501 is smaller than that of other parts of the conductive melt 500. When the conductive melt 500 overloads and heats, the melting portion 501 will melt first. The face close to the inner side of the upper end of the conductive melt 500 is provided with a guide wedge surface.

[0037] The upper mounting box 310 is fixed on the upper insulating seat 300, and the telescopic clamping rod 312 and the second elastic member 314 are arranged in the upper mounting box 310. The end of the telescopic clamping rod 312 is pushed by the second elastic member 314 to extend out of the upper mounting box 310 and is inserted into the mounting hole 502 of the conductive fuse 500. The upper and lower ends of the conductive fuse 500 are respectively attached to the upper conductive block 202 and the lower conductive block 203. In this way, the conductive fuse 500 is electrically connected to the upper conductive block 202 and the lower conductive block 203, thereby connecting the high-voltage line of the high-voltage power distribution system.

[0038] The sliding seat driving assembly is used to drive the upper insulating seat 300 and the lower insulating seat 400 to move close to each other, so that the conductive fuse 500 is clamped and connected between the upper insulating seat 300 and the lower insulating seat 400, thereby conducting the upper conductive block 202 and the lower conductive block 203.

[0039] When the conductive fuse 500 is overloaded, the heat generated by the heat generated by the conductive fuse 500 can melt the conductive fuse 500 at the melting portion 501. At this time, the conductive fuse 500 is broken into upper and lower broken portions. The first elastic member 600 can quickly push the upper and lower insulating seats apart, and the upper and lower insulating seats 300 and 400 are respectively slid out of the insulating protective cover plate 200. The upper and lower insulating seats are respectively moved to the upper and lower sliding grooves 102 and 103. The upper and lower broken portions of the conductive fuse 500 are separated from the upper and lower conductive blocks. In this way, sufficient gap distance between the upper and lower broken portions can be ensured, so that the fuse can be quickly disconnected to prevent the conductive fuse 500 from generating an arc after being melted, and the harm of the overload of the high-voltage power distribution system is reduced.

[0040] In the preferred embodiment, the telescopic sleeve body 311 is arranged on the upper mounting box 310, and the telescopic clamping rod 312 is slidably arranged in the telescopic sleeve body 311. The limiting ring 313 is fixed on the telescopic clamping rod 312, and the second elastic member 314 is sleeved on the telescopic clamping rod 312. The two ends of the second elastic member 314 are respectively abutted against the bottom of the upper mounting box 310 and the limiting ring 313. In this way, when the end of the telescopic clamping rod 312 is pressed by the guide wedge surface of the conductive fuse 500, the telescopic clamping rod 312 can retract against the elastic force of the second elastic member 314.

[0041] The middle of the telescopic clamping rod 312 is provided with a sliding limiting rod 315, which is a part of the telescopic clamping rod 312 and has a smaller diameter than the rest of the telescopic clamping rod 312. The telescopic clamping rod 312 is provided with a pressing push plate 316, and the pressing push plate 316 is provided with a push plate hole. The sliding limiting rod 315 passes through the push plate hole to slide the pressing push plate 316 on the sliding limiting rod 315. The push plate hole has a smaller diameter than the rest of the telescopic clamping rod 312, so that the sliding range of the pressing push plate 316 on the telescopic clamping rod 312 is limited. The telescopic clamping rod 312 is further provided with a third elastic member 317, and the two ends of the third elastic member 317 abut against the upper mounting box 310 and the pressing push plate 316, respectively. The pressing push plate 316 is tightly pressed on the upper conductive block 202. When the conductive melt 500 is broken, the third elastic member 317 is pushed away from the telescopic clamping rod 312 by the pressing push plate 316, so as to ensure that the upper broken part of the conductive melt 500 is quickly and automatically separated. It can be understood that the first, second and third elastic members can be coil springs.

[0042] The clamping block 411 is provided with a clamping threaded hole 414, and the clamping threaded hole 414 is provided with a clamping screw 415. The lower end of the conductive melt 500 is provided with a locking hole 503, and the clamping screw 415 locks the lower end of the conductive melt 500 on the clamping block 411. The clamping threaded hole 414 is an internal hexagonal screw, and the locking hole 503 is a countersunk hole, so that the head of the clamping screw 415 does not protrude from the locking hole 503 after the lower end of the conductive melt 500 is locked.

[0043] After the conductive melt 500 is broken, the third elastic member 317 on the telescopic clamping rod 312 pushes the upper broken part of the telescopic clamping rod 312 away from the telescopic clamping rod 312 through the pressing push plate 316, so as to ensure that the upper broken part of the conductive melt 500 is quickly and automatically separated. The high temperature of the upper broken part does not damage the components of the upper insulating seat 300, and the problem of manually removing the high temperature of the upper broken part during the replacement of the conductive melt 500 is avoided.

[0044] When the fuse is replaced with a new conductive melt 500, the lower broken part of the clamping block 411 is first removed, then the lower end of the new conductive melt 500 is installed on the clamping block 411, and the upper and lower insulating seats 300, 400 are driven to approach each other by the slide seat driving assembly to reset. During the resetting process of the upper and lower insulating seats 300, 400, the outer side of the new conductive melt 500 first contacts the lower conductive block 203, then the guide wedge surface at the upper end of the conductive melt 500 drives the telescopic clamping rod 312 to retract, and the upper end of the new conductive melt 500 continues to move upward until the mounting hole 502 at the upper end of the conductive melt 500 is aligned with the telescopic clamping rod 312. At this time, the telescopic clamping rod 312 can be inserted into the mounting hole 502 of the new conductive melt 500, and the replacement of the conductive melt 500 is completed. When the fuse is replaced with a new conductive melt 500, it is not necessary to disassemble the remaining components except the lower broken part of the original conductive melt 500, which can greatly simplify the replacement process of the conductive melt 500 of the fuse, improve the safety of the fuse replacement, shorten the replacement time of the conductive melt 500 of the fuse and the power restoration time of the fuse, and reduce the power loss of the high-voltage power distribution system.

[0045] In a preferred embodiment, the lower insulating seat 400 is provided with a lower mounting box 410, the lower mounting box 410 is provided with a telescopic hole, the end of the clamping block 411 is provided with a limiting seat 412, and the two are an integrated structure. The limiting seat 412 is slidingly arranged in the lower mounting box 410, the clamping block 411 extends out of the lower mounting box 410 through the telescopic hole, and a plurality of V-shaped elastic pieces 413 are fixed in the lower mounting box 410. The V-shaped elastic pieces 413 can push the clamping block 411 outward, so that the clamping block 411 can elastically press the lower end of the conductive melt 500 on the lower conductive block 203.

[0046] The third elastic member 317 on the telescopic clamping rod 312 of the upper insulating seat 300 of the fuse can press the upper end of the conductive melt 500 on the upper conductive block 202 after the installation of the conductive melt 500. The lower mounting box 410 is provided on the lower insulating seat 400, and the V-shaped elastic pieces 413 in the lower mounting box 410 can slightly extrude the clamping block 411 after the installation of the conductive melt 500, so that the lower end of the conductive melt 500 is pressed on the lower conductive block 203. After the installation of the conductive melt 500 of the fuse, the upper and lower ends of the conductive melt 500 are elastically installed on the upper and lower insulating seats, respectively. The upper and lower insulating seats elastically press the conductive melt 500 on the upper and lower conductive blocks by using the third elastic member 317 and the V-shaped elastic pieces 413, which ensures the reliability of the electrical connection of the conductive melt 500 and avoids the problem of increased contact resistance or poor contact caused by vibration or thermal expansion and contraction of the traditional rigid connection of the conductive melt 500.

[0047] Reference Figure 9In the embodiment, the middle part of the upper and lower conductive blocks is provided with expansion joints, so that the upper and lower conductive blocks have elasticity, so that the upper and lower conductive blocks can be elastically deformed to a certain extent when being pressed, to ensure that the conductive melt 500 is closely attached to the upper and lower conductive blocks, and to further improve the reliability of the electrical connection between the conductive melt 500 and the upper and lower conductive blocks. At the same time, the upper and lower conductive blocks have a certain elasticity and can be slightly compressed by the conductive melt 500, so as to ensure the smooth sliding of the conductive melt 500 and prevent the conductive melt 500 from interfering with the upper and lower conductive blocks during upward movement. The outer side surface of the upper end of the conductive melt 500 can also be provided with an outer wedge surface (not shown in the figure), which ensures that the conductive melt 500 is not blocked by the lower edge of the upper and lower conductive blocks during upward movement.

[0048] Reference Figures 1-3 The slide drive assembly includes a rotating sleeve 700, a drive shaft 701, and a drive disc 702. The upper drive rod 322 is provided with a rotating pulley 323. The rotating sleeve 700 is fixed on the mounting bottom plate 101. The drive shaft 701 is rotatably arranged in the rotating sleeve 700 through a bearing. The drive disc 702 is fixed on the end of the drive shaft 701. The drive disc 702 is wound with a drive rope 800. One end of the drive rope 800 is fixed on the drive disc 702. The other end of the drive rope 800 is wound around the rotating pulley 323 and fixedly connected to the lower drive rod 422. The end of the drive shaft 701 is also provided with a limiting cap 703. The limiting cap 703 prevents the drive shaft 701 from falling out of the rotating sleeve 700. The limiting cap 703 is also fixedly provided with a drive shaft 704. The drive shaft 704 facilitates the rotation of the drive shaft 701 by the staff.

[0049] After the conductive melt 500 is fused, the upper and lower insulating seats are pushed by the first elastic member 600 to the top of the upper sliding groove 102 and the bottom of the lower sliding groove 103, respectively. When the new conductive melt 500 is clamped and locked by the clamping screw 415 on the clamping block 411 of the lower insulating seat 400, the staff can rotate the drive shaft 701 by the drive shaft 704 to drive the drive disc 702 to rotate, so as to shorten the length of the part of the drive rope 800 that is not wound on the drive disc 702. The drive rope 800 is conveniently driven by the tension to drive the upper and lower insulating seats 300 and 400 to approach each other, so as to realize the installation of the conductive melt 500 and the restoration of the power supply of the fuse. The slide drive assembly can move the operating part away from the conductive block with electricity, improve the safety of the conductive melt 500, and further improve the efficiency of replacing the conductive melt 500 of the fuse.

[0050] Reference Figure 10 The method for replacing the conductive melt of the fuse of the high-voltage power distribution system includes the following steps. S1: the conductive melt 500 overloads and generates heat, causing the breaking part 501 to break; the first elastic member 600 simultaneously pushes the upper and lower insulating seats 300 and 400 to move upward and downward along the sliding grooves to the upper and lower ends of the sliding grooves, so as to quickly separate the broken conductive melt 500; S2: the third elastic member pushes the pressing push plate 316 to move outward along the sliding limiting rod 315, so that the pressing push plate 316 pushes the upper broken part of the conductive melt 500 outward, and the upper broken part of the conductive melt 500 is separated from the telescopic clamping rod 312; S3: the lower broken part of the conductive melt 500 on the clamping block 411 is removed, and a new conductive melt 500 is fixed at the lower end of the clamping block 411; S4: the upper and lower insulating seats 300 and 400 are driven to move downward and upward respectively by the sliding seat driving assembly, so that the upper and lower insulating seats 300 and 400 approach each other; during the approaching process of the upper and lower insulating seats 300 and 400, the upper end of the new conductive melt 500 first presses the telescopic clamping rod 312 to retract, and then the mounting hole 502 of the conductive melt 500 moves to be aligned with the telescopic clamping rod 312, the telescopic clamping rod 312 rebounds and is inserted into the mounting hole 502, and the pressing push plate 316 presses the upper end of the conductive melt 500 against the upper conductive block 202 under the action of the third elastic member 317.

[0051] In this document, the front, back, upper, lower, and other orientation words are defined according to the positions of the components in the drawings and the positions of the components relative to each other, only for the purpose of expressing the technical solutions clearly and conveniently. It should be understood that the use of the orientation words should not limit the scope of the application claimed.

[0052] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other.

[0053] The above-mentioned is only the preferred embodiment of the present application, and should not be used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fuse for use in a high voltage distribution system, characterized in that, The shell (100), the conductive melt (500) and the sliding seat driving assembly are included. The mounting bottom plate (101) is fixedly arranged in the shell (100), and the sliding groove is arranged on the mounting bottom plate (101); the front surface of the mounting bottom plate (101) is fixedly provided with the insulating protective cover plate (200), and the inner wall of the insulating protective cover plate (200) is fixedly provided with the upper conductive block (202) and the lower conductive block (203); The upper insulating seat (300) and the lower insulating seat (400) are arranged in the shell (100), and the sliding clamping blocks are arranged on the upper insulating seat (300) and the lower insulating seat (400); the two sliding clamping blocks are slidingly arranged in the sliding groove; the first elastic member (600) is arranged between the upper insulating seat (300) and the lower insulating seat (400); The clamping block (411) is arranged on the lower insulating seat (400), and the lower end of the conductive melt (500) is clamped on the clamping block (411); the mounting hole (502) is further fixedly arranged on the upper end of the conductive melt (500), and the melting gap is further arranged on the mounting hole (502); the melting gap forms the melting part (501) on the conductive melt (500); the upper end of the conductive melt (500) is provided with the guide wedge surface; The upper mounting box (310) is fixedly arranged on the upper insulating seat (300), the telescopic clamping rod (312) and the second elastic member (314) are arranged in the upper mounting box (310), the end of the telescopic clamping rod (312) is extended to the outside of the upper mounting box (310) and inserted into the mounting hole (502) of the conductive melt (500) by the pushing of the second elastic member (314), and the upper end and the lower end of the conductive melt (500) are respectively attached to the upper conductive block (202) and the lower conductive block (203); The sliding seat driving assembly is used for driving the upper insulating seat (300) and the lower insulating seat (400) to be close to each other.

2. A fuse for a high voltage distribution system according to claim 1, wherein, The telescopic sleeve body (311) is arranged on the upper mounting box (310), and the telescopic clamping rod (312) is slidingly arranged in the telescopic sleeve body (311); The limiting ring (313) is fixedly arranged on the telescopic clamping rod (312), the second elastic member (314) is sleeved on the telescopic clamping rod (312), and the two ends of the second elastic member (314) are respectively abutted against the bottom of the upper mounting box (310) and the limiting ring (313).

3. A fuse for a high voltage distribution system according to claim 2, wherein, The sliding limiting rod (315) is arranged in the middle part of the telescopic clamping rod (312), the pressing push plate (316) is arranged on the telescopic clamping rod (312), the push plate hole is arranged on the pressing push plate (316), and the sliding limiting rod (315) passes through the push plate hole, so that the pressing push plate (316) is slidingly arranged on the sliding limiting rod (315); The third elastic member (317) is further sleeved on the telescopic clamping rod (312), the two ends of the third elastic member (317) are respectively abutted against the upper mounting box (310) and the pressing push plate (316), and the upper end of the conductive melt (500) is pressed on the upper conductive block (202) by the pressing push plate (316).

4. A fuse for a high voltage distribution system according to claim 3, wherein, The clamping block (411) is provided with a clamping threaded hole (414), the clamping threaded hole (414) is provided with a clamping screw (415), the lower end of the conductive melt (500) is provided with a locking hole (503), and the clamping screw (415) locks the lower end of the conductive melt (500) on the clamping block (411).

5. A fuse for use in a high voltage distribution system according to claim 4, wherein, The clamping threaded hole (414) is an internal hexagonal screw, and the locking hole (503) is a countersunk hole.

6. A fuse for a high voltage distribution system according to claim 4, wherein, The lower end of the conductive melt (500) is provided with a locking hole (503), and the clamping screw (415) locks the lower end of the conductive melt (500) on the clamping block (411).

7. The fuse for a high-voltage distribution system according to claim 3, wherein, The two sliding blocks are respectively provided with a supporting sliding block and a sliding driving rod, the sliding driving rod connected with the upper insulating seat (300) is an upper driving rod (322), the sliding driving rod connected with the lower insulating seat (400) is a lower driving rod (422), and the upper driving rod (322) is provided with a rotating pulley (323). The sliding seat driving assembly comprises a rotating sleeve (700), a driving rotating shaft (701) and a driving rotating disc (702), the rotating sleeve (700) is fixed on the mounting bottom plate (101), the driving rotating shaft (701) is rotatably arranged in the rotating sleeve (700), the driving rotating disc (702) is fixed on the end of the driving rotating shaft (701), the driving rotating disc (702) is wound with a driving rope (800), one end of the driving rope (800) is fixed on the driving rotating disc (702), and the other end of the driving rope (800) is wound around the rotating pulley (323) and fixed on the lower driving rod (422).

8. A fuse for a high voltage distribution system according to claim 7, wherein, The end of the driving rotating shaft (701) is further provided with a limiting cap (703), and the limiting cap (703) is further fixed with a driving rotating rod (704).

9. A fuse for a high voltage distribution system according to claim 8, wherein, The middle part of the sliding groove is further provided with a limiting block, the limiting block divides the sliding groove into an upper sliding groove (102) and a lower sliding groove (103), the sliding block on the upper insulating seat (300) is slidably arranged in the upper sliding groove (102), and the sliding block on the lower insulating seat (400) is slidably arranged in the lower sliding groove (103).

10. A method of replacing a conductive melt of a fuse, characterized by, The method is used for the fuse for a high-voltage distribution system according to any one of claims 3-9, and the method comprises the following steps; S1: the conductive melt (500) is overloaded and heated to cause the fuse part (501) to break; the first elastic member (600) simultaneously pushes the upper insulating seat (300) and the lower insulating seat (400) to move upward and downward along the sliding groove to the upper end and the lower end of the sliding groove, so that the broken conductive melt (500) is rapidly separated; S2: The third elastic member (317) pushes the compression push plate (316) to move along the sliding limiting rod (315) to the outside, so that the compression push plate (316) pushes the upper broken part of the conductive melt (500) to the outside, and the upper broken part of the conductive melt (500) is separated from the telescopic clamping rod (312); S3: The lower broken part of the conductive melt (500) on the clamping block (411) is removed, and a new conductive melt (500) is fixed on the clamping block (411); S4: The upper and lower insulation bases (300) and (400) are driven to move downward and upward respectively, so that the upper and lower insulation bases (300) and (400) approach each other; during the approaching process of the upper and lower insulation bases (300) and (400), the upper end of the new conductive melt (500) is first pressed to retract the telescopic clamping rod (312), and then the mounting hole (502) of the conductive melt (500) is moved to be aligned with the telescopic clamping rod (312), the telescopic clamping rod (312) is inserted into the mounting hole (502), and the compression push plate (316) is pressed to the upper conductive block (202) under the action of the third elastic member (317).

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