A high-voltage fuse

Abstract

The present application relates to the technical field of fuse, in particular to a high-voltage fuse, which comprises an insulator, a conductive wheel, a fuse tube and an auxiliary assembly, in the erection of high-voltage transmission line, the insulator is fixedly inclined on the electric pole, the first and second wire holders are arranged at the upper and lower ends respectively, the cable is connected thereto, the first wire holder is provided with the conductive wheel which can rotate and slide, the top pressing piece ensures that the rotating shaft is located at the lower end of the guide groove at the initial time, and a plurality of first push blocks are uniformly arranged on the wheel circumference. When closing, the lower end of the fuse tube with the fuse is connected to the second wire holder, the staff pushes the upper contact of the upper end to approach the first wire holder, the upper contact slowly contacts the conductive wheel and rotates, and at the same time, the conductive wheel is extruded to move along the guide groove; after closing, the auxiliary assembly pushes the upper contact, reduces the risk of disengagement, and improves the stability of the fuse.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuses, in particular to a high-voltage fuse. BACKGROUND

[0002] As a key protection device of outdoor high-voltage transmission lines, the reliability and breaking performance of the contact system of the high-voltage fuse directly affect the safe and stable operation of the power grid. The high-voltage fuse has an insulator and a fuse tube, the middle part of the insulator can be fixed on a power pole, the upper end and the lower end of the insulator are provided with wiring terminals, the fuse tube can install a fuse inside, the lower end of the fuse tube is a lower contact, the upper end of the fuse tube is an upper contact, the lower contact can be connected to the lower end of the insulator, and the upper contact can be connected to the upper end of the insulator. During closing, the lower contact rotates at the lower end of the insulator, and the upper contact gradually contacts the upper end of the insulator. The conductive contact surfaces of the upper contact and the lower contact have relative movement during the opening and closing operation. Continuous mechanical wear can damage the flatness of the contact surface, cause fluctuations in the conductive performance, and increase the risk of overheating caused by excessive contact resistance. In addition, in terms of structural stability, the fuse tube is connected to the wiring terminals provided on the insulator by an elastic fixing method. When subjected to external forces such as strong winds, it is easy to produce shaking or vibration, resulting in loose connection of the upper contact, further aggravating the poor contact problem, and lacking targeted auxiliary stabilizing structure. SUMMARY

[0003] The present application provides a high-voltage fuse to solve the problem of frequent failures of existing high-voltage fuses during use.

[0004] The high-voltage fuse of the present application adopts the following technical scheme:

[0005] A high-voltage fuse, comprising an insulator, a conductive wheel, a fuse tube and an auxiliary assembly.

[0006] The upper end of the insulator is fixedly provided with a first wiring rack, and the lower end of the insulator is fixedly provided with a second wiring rack;

[0007] The conductive wheel is a regular polyhedral structure, the conductive wheel is coaxially fixedly provided with a rotating shaft, the first wiring rack is provided with a guide groove, the rotating shaft can rotate and slide in the guide groove, the first wiring rack is provided with a tightening piece, the tightening piece can drive the rotating shaft to slide to the lower end of the guide groove, or the tightening piece can drive the rotating shaft to have a tendency to slide to the lower end of the guide groove; the conductive wheel is provided with a plurality of first actuating blocks;

[0008] The fuse tube is capable of installing a fuse inside, the fuse tube has an upper contact and a lower contact, the lower contact is capable of being hinged to the second terminal block, the upper contact is capable of pushing one of the first push blocks during closing, and the upper contact is capable of pushing the conductive wheel;

[0009] The auxiliary assembly is used for pushing the upper contact after closing.

[0010] Further, the auxiliary assembly includes two sets of pushing assemblies, each set of the pushing assembly includes an induction wheel and a pushing rod, the induction wheel is coaxially connected to the conductive wheel, the first terminal block is provided with a reverser, the reverser is used for driving the induction wheel to rotate reversely when the conductive wheel rotates; the pushing rod is capable of being telescopically arranged, the first terminal block is provided with a mounting block, the pushing rod is slidably arranged on the mounting block, the pushing rod has a waiting station and a pushing station on the mounting block, the pushing rod is initially set to be at the waiting station; during closing, the induction wheel can guide the pushing rod to slide from the waiting station to the pushing station, and when closing is completed, the pushing rod can be quickly elongated at the pushing station and abut against the upper contact.

[0011] Further, the mounting block has a mounting cavity inside, a sliding slot is arranged on the sidewall of the mounting block and communicates with the mounting cavity and the external environment, the pushing rod includes a driving section and an abutting section, the driving section is slidably inserted into the abutting section, the abutting section can abut against the upper contact, one end of the abutting section extends to the mounting cavity through the sliding slot, and a linkage is arranged on the abutting section, during closing, the induction wheel can guide the abutting section to slide in the sliding slot through the linkage;

[0012] A limiting piece is arranged on the mounting block, the limiting piece can limit the sliding of the abutting section in the axial direction of the abutting section, and when the abutting section slides to the end of the sliding slot, the limiting piece releases the limitation on the sliding of the abutting section in the axial direction of the abutting section;

[0013] A force storage spring is arranged between the end of the driving section inside the abutting section and the inside of the abutting section, when the pushing rod is at the waiting station, the abutting section is at one end of the sliding slot, the force storage spring is in an uncharged state, when the pushing rod slides from the waiting station to the pushing station, the force storage spring is gradually charged, when the pushing rod moves to the pushing station, the abutting section moves to the other end of the sliding slot, and the force storage spring is rapidly released.

[0014] Further, the linkage comprises a sliding block, a push rod and second push blocks, the sliding block is slidingly connected to the outside of the abutting section, and the sliding block is slidingly arranged in the sliding groove; the second push blocks are provided in plurality, and the second push blocks are uniformly fixed in the circumferential direction of the induction wheel; the push rod is fixed on the sliding block, and the rotation of the induction wheel in the closing process can push the push rod through one of the second push blocks, so that the sliding block slides in the sliding groove.

[0015] Further, the inner side wall of the mounting block is provided with a guide groove, the guide groove has a first section, a second section and a third section, the first section and the second section are both arranged in a circular arc shape, the radii of the first section and the second section are different, one end of the first section and one end of the second section are communicated, and the third section communicates the other end of the first section and the other end of the second section, the communication point of the first section and the second section is defined as point C, the communication point of the first section and the third section is defined as point B, and the communication point of the second section and the third section is defined as point A, after the closing is completed, the distance between the A point and the upper contact is equal to the distance between the C point and the upper contact, and the distance between the B point and the upper contact is greater than the distance between the A point and the upper contact; the driving block is arranged at one end of the driving section outside the abutting section, and the driving block can slide in the first section, the second section and the third section, in the initial state, the driving block is located at the B point, and in the closing process, the driving block gradually approaches the C point from the B point through the first section.

[0016] Further, the reset rod is fixed on the sliding block, the reset tension spring is connected between the reset rod and the first terminal block, and in the initial state, the reset tension spring is in the original length state; the depth of the first section is in a gradual change state, the depth of the first section near the C point is smaller than the depth of the first section near the B point; the first limiting groove is arranged at the position near the C point of the second section, the limiting block is slidingly arranged in the first limiting groove, the limiting block can completely enter the first limiting groove, and part of the limiting block can also be separated from the first limiting groove; when the driving block moves to the end of the second section near the C point, the first section and part of the limiting block separated from the first limiting groove jointly limit the movement of the driving block; the limiting block is used for completely entering the first limiting groove when the fuse is burned out.

[0017] Further, the reset spring is arranged between the end of the abutting section inside the mounting cavity and the inner side wall of the mounting cavity, and in the initial state, the reset spring is in the original length state, and the stiffness coefficient of the reset spring is much smaller than the stiffness coefficient of the storage spring.

[0018] Further, the limiting piece comprises a limiting arc plate, a second limiting groove and a movable groove, the limiting arc plate is fixedly arranged on the mounting block, the second limiting groove and the movable groove are arranged at intervals on the outer side wall of the abutting section, both ends of the limiting arc plate are provided with notches, in the process of closing, the limiting arc plate enters the second limiting groove, and in the case of fuse breaking, the limiting arc plate enters the movable groove.

[0019] Further, the driving block is provided with a plug-in groove, a driving rod is slidably plugged in the plug-in groove, the plug-in groove and the driving rod are provided with a jacking spring, and the jacking spring is used to drive the driving rod to abut against the bottom of the first section, the second section and the third section.

[0020] Further, the first terminal block is provided with a sliding sleeve, the sliding sleeve is slidably connected to a guide groove, the rotating shaft is unidirectionally connected to the sliding sleeve, and the jacking piece is a compression spring arranged between the sliding sleeve and the first terminal block.

[0021] The beneficial effects of the present application are as follows: the high-voltage fuse comprises an insulator, a conductive wheel, a fuse tube and an auxiliary assembly, when a high-voltage transmission line is erected, the insulator is fixed on a power pole, the insulator is usually erected obliquely, a first terminal block and a second terminal block are respectively arranged at the upper end and the lower end of the insulator, a cable can be connected to the first terminal block and the second terminal block, the conductive wheel is arranged on the first terminal block, the conductive wheel can rotate and slide on the first terminal block, a jacking piece is arranged on the first terminal block, the rotating shaft on the conductive wheel is arranged at the lower end of the guide groove in the initial state, and a plurality of first driving blocks are evenly arranged in the circumferential direction of the conductive wheel; when closing is needed, the lower end of the fuse tube provided with a fuse is rotatably connected to the second terminal block, the worker gradually approaches the first terminal block by pushing the upper contact at the upper end of the fuse tube, in this process, the upper contact gradually and slowly contacts the conductive wheel, at the same time, the conductive wheel gradually rotates, the upper contact can extrude the conductive wheel in the direction of the guide groove, after the closing is completed, the auxiliary assembly pushes the upper contact, the risk that the upper contact is separated from the abutting conductive wheel is reduced, and the stability of the fuse in the use process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1A first isometric view of a high-voltage fuse according to an embodiment of the present application;

[0024] Figure 2 A second isometric view of a high-voltage fuse according to an embodiment of the present application;

[0025] Figure 3 A Figure 2 Close-up view of detail I;

[0026] Figure 4 A front view of a high-voltage fuse according to an embodiment of the present application;

[0027] Figure 5 A Figure 4 Close-up view of detail II;

[0028] Figure 6 A third isometric view of a high-voltage fuse according to an embodiment of the present application, after sectioning;

[0029] Figure 7 A Figure 6 Close-up view of detail III;

[0030] Figure 8 A Figure 7 Close-up view of detail IV;

[0031] Figure 9 A schematic view of the structure of a mounting block and a jacking rod in a high-voltage fuse according to an embodiment of the present application;

[0032] Figure 10 A schematic view of the structure of a mounting block and a jacking rod in a high-voltage fuse according to an embodiment of the present application, after sectioning;

[0033] Figure 11 A Figure 10 Close-up view of detail V.

[0034] In the figure: 110, insulator; 111, connecting piece; 120, first terminal block; 130, second terminal block; 210, conductive wheel; 211, rotating shaft; 220, fuse tube; 221, upper contact; 222, lower contact; 230, induction wheel; 240, jacking rod; 241, driving section; 242, abutting section; 243, force storage spring; 244, reset spring; 250, driving wheel; 260, driven wheel; 270, reversing wheel; 280, support rod; 290, first spring; 310, mounting block; 311, sliding groove; 320, sliding block; 330, actuating rod; 340, second actuating block; 350, guide groove; 351, first section; 352, second section; 353, third section; 360, driving block; 410, reset rod; 420, reset tension spring; 430, limiting block; 440, limiting arc plate; 450, second limiting groove; 460, movable groove; 470, driving rod; 480, sliding sleeve; 490, buffer sleeve. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in horizontal height than the second feature. The first feature is "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in horizontal height than the second feature.

[0038] As shown in Figures 1 to 11 The high-voltage fuse provided by the embodiment of the present application includes an insulator 110, a conductive wheel 210, a fuse tube 220 and an auxiliary assembly.

[0039] The insulator 110 includes an insulating rod and a plurality of insulating sheets, the plurality of insulating sheets are coaxially fixed on the insulating rod, the plurality of insulating sheets are arranged at intervals, a connecting sheet 111 is fixed at the middle part of the insulating rod, a worker can fix the connecting sheet 111 on a telegraph pole through a bolt, a first wiring rack 120 is fixed at the upper end of the insulating rod, a second wiring rack 130 is fixed at the lower end of the insulating rod, a cable can be connected with the first wiring rack 120 and the second wiring rack 130, and the first wiring rack 120 and the second wiring rack 130 are both made of conductive material.

[0040] The conductive wheel 210 is a regular polyhedral structure, the conductive wheel 210 is made of conductive material, a plurality of first driving blocks are arranged on the conductive wheel 210, each first driving block is fixed on one edge in the circumferential direction of the conductive wheel 210, the conductive wheel 210 is coaxially fixed with a rotating shaft 211, the rotating shaft 211 is made of the same material as the conductive wheel 210, a guide groove is arranged on the first wiring rack 120, the extension direction of the guide groove is parallel to the extension direction of the insulating rod, the rotating shaft 211 can rotate and slide in the guide groove, a jacking piece is arranged on the first wiring rack 120, the jacking piece can drive the rotating shaft 211 to slide to the lower end of the guide groove, or the jacking piece can drive the rotating shaft 211 to have a tendency to slide to the lower end of the guide groove, in the initial state, the rotating shaft 211 is at the lower end of the guide groove under the action of the jacking piece.

[0041] The fuse tube 220 is hollow inside, the hollow chamber of the fuse tube 220 can be installed with a fuse, the fuse tube 220 has an upper contact 221 and a lower contact 222, the second wiring rack 130 is provided with a placing groove, the lower contact 222 can be placed in the placing groove, so that the lower contact 222 can rotate in the placing groove, in the process of assembling the fuse, the worker needs to fix the connecting sheet 111 on the electric pole first, and then place the lower contact 222 of the fuse tube 220 in the placing groove, in the process of needing to close, the worker pushes the upper contact 221 of the fuse tube 220 to gradually approach the conductive wheel 210, the upper contact 221 can push one of the first push blocks, so that the conductive wheel 210 rotates, in the process of rotating the conductive wheel 210, the conductive wheel 210 is pushed upward along the guide groove by the upper contact 221, and the tightening member further stores energy. Since the conductive wheel 210 is provided as a regular polyhedral structure, according to the position setting of the first push block, in the process of rotating the conductive wheel 210, the conductive wheel 210 slowly contacts the upper contact 221, and in the process of slowly contacting the conductive wheel 210 and the upper contact 221, there is no relative movement between the upper contact 221 and the conductive wheel 210, thereby slowing down the wear between the upper contact 221 and the conductive wheel 210.

[0042] The auxiliary assembly is used to push the upper contact 221 after closing, specifically, after closing, the fuse tube 220 remains in a static state, at this time the auxiliary assembly pushes the upper contact 221, the pushing direction of the auxiliary assembly to the upper contact 221 is the movement direction of the upper contact 221 in the closing process, under the action of the auxiliary assembly, the situation of opening in the case of bad weather or external force collision is prevented.

[0043] The high-voltage fuse of the application, when erecting high-voltage transmission line, fixes the insulator 110 on the electric pole, usually erects the insulator 110 obliquely, respectively installs the first wiring rack 120 and the second wiring rack 130 on the upper and lower ends of the insulator 110, the cable can be connected on the first wiring rack 120 and the second wiring rack 130, installs the conductive wheel 210 on the first wiring rack 120, ensures that the conductive wheel 210 can rotate and slide on the first wiring rack 120, sets the top pressing piece on the first wiring rack 120, ensures that the rotating shaft 211 on the conductive wheel 210 is at the lower end of the guide groove in the initial state, and uniformly installs a plurality of first push blocks in the circumferential direction of the conductive wheel 210; when closing is needed, the lower end of the fuse tube 220 installed with the fuse is rotatably connected on the second wiring rack 130, the worker gradually approaches the first wiring rack 120 by pushing the upper contact 221 on the upper end of the fuse tube 220, in the process, the upper contact 221 gradually and slowly contacts the conductive wheel 210, at the same time, the conductive wheel 210 gradually rotates, the upper contact 221 can extrude the conductive wheel 210 along the direction of the guide groove, after the closing is completed, the auxiliary assembly pushes the upper contact 221, reduces the risk that the upper contact 221 is separated from the abutting conductive wheel 210, and further improves the stability of the fuse in the use process.

[0044] In one of the embodiments, the auxiliary assembly comprises two sets of pushing assemblies, the two sets of pushing assemblies are spaced apart, and the distance between the two sets of pushing assemblies is greater than the diameter of the upper contact 221. Each set of pushing assembly comprises an induction wheel 230 and a pushing rod 240, the induction wheel 230 is coaxially connected to the conductive wheel 210, and further, the induction wheel 230 is rotatably connected to the rotating shaft 211. The first terminal block 120 is provided with a commutator, the commutator is used to drive the induction wheel 230 to rotate reversely when the conductive wheel 210 rotates. In this embodiment, the commutator comprises a driving wheel 250, a driven wheel 260 and a reversing wheel 270, the driving wheel 250 is coaxially fixedly connected to the rotating shaft 211, the driven wheel 260 is coaxially fixedly connected to the induction wheel 230, the reversing wheel 270 is coaxially fixedly provided with a support rod 280, the support rod 280 can rotate and slide on the first terminal block 120, the extension direction of the support rod 280 is parallel to the extension direction of the guide groove, the support rod 280 is sleeved with a first spring 290, one end of the first spring 290 abuts against the first terminal block 120, the other end of the first spring 290 abuts against the reversing wheel 270, the reversing wheel 270 simultaneously engages the driven wheel 260 and the driving wheel 250, by arranging the support rod 280, it is ensured that the reversing wheel 270 can keep the state of engaging the driven wheel 260 and the driving wheel 250 when the rotating shaft 211 slides along the guide groove, after the rotating direction of the induction wheel 230 and the conductive wheel 210 is changed by the commutator, it is ensured that the pushing rod 240 does not hinder the extrusion of the upper contact 221 to the conductive wheel 210 in the movement process. Further, the reversing wheel 270, the driving wheel 250 and the driven wheel 260 are ceramic gears or rubber friction wheels.

[0045] The pushing rod 240 can be telescopically arranged, the first terminal block 120 is provided with a mounting block 310, the pushing rod 240 is slidably arranged on the mounting block 310, the pushing rod 240 is horizontally arranged, and the extension direction of the pushing rod 240 is the radial direction of the upper contact 221 after the closing is completed. The pushing rod 240 has a waiting station and a pushing station on the mounting block 310, the pushing rod 240 is initially set to be at the waiting station, at this time, there is a certain included angle between the pushing rods 240 in the two sets of pushing assemblies. In the closing process, the induction wheel 230 can guide the pushing rod 240 to slide from the waiting station to the pushing station, when the closing is completed, the pushing rod 240 moves to the position of the pushing station, the pushing rod 240 can be quickly elongated, and the pushing rod 240 can abut against the outer side wall of the upper contact 221 during the elongation, and the pushing rods 240 in the two sets of pushing assemblies jointly extrude the upper contact 221.

[0046] In one of the embodiments, the mounting block 310 has a mounting cavity inside, and the sidewall of the mounting block 310 is provided with a sliding groove 311 communicating with the mounting cavity and the external environment, the sliding groove 311 is arranged in an arc shape, and the arc center of the sliding groove 311 is located at the axis position of the upper contact 221 after the closing is completed. The jacking rod 240 includes a driving section 241 and an abutting section 242, the abutting section 242 is hollow inside, the abutting section 242 can abut against the upper contact 221, one end of the abutting section 242 extends to the mounting cavity through the sliding groove 311, one end of the driving section 241 is slidingly inserted into the inside of the abutting section 242, and the abutting section 242 is provided with a linkage, during the closing process, the induction wheel 230 can guide the abutting section 242 to slide in the sliding groove 311 through the linkage, so as to ensure that the jacking rod 240 can be moved from the waiting station to the jacking station during the closing process.

[0047] The mounting block 310 is provided with a limiting piece, the limiting piece can limit the sliding of the abutting section 242 in the axial direction of the abutting section 242, when the abutting section 242 slides to the end of the sliding groove 311, the limiting piece releases the limitation on the sliding of the abutting section 242 in the axial direction of the abutting section 242, in the initial state, the jacking rod 240 is in the waiting station, at this time, the abutting section 242 is located at one end of the sliding groove 311, and the limiting piece does not limit the sliding of the abutting section 242 in the axial direction of the abutting section 242, during the closing process, the induction wheel 230 can guide the abutting section 242 to slide in the sliding groove 311 through the linkage, once the abutting section 242 is not located at the end of the sliding groove 311, the limiting piece starts to limit the sliding of the abutting section 242 in the axial direction of the abutting section 242, when the closing is completed, the jacking rod 240 moves to the jacking station, the abutting section 242 is located at the other end of the sliding groove 311, and then the limiting piece releases the limitation on the sliding of the abutting section 242 in the axial direction of the abutting section 242, at this time, the abutting section 242 moves in the axial direction of the abutting section 242 quickly until the abutting section 242 abuts against the outer sidewall of the upper contact 221.

[0048] Further, the one end of the driving section 241 inside the abutting section 242 and the inside of the abutting section 242 are provided with a force storage spring 243, in the initial state, the jacking rod 240 is in the waiting station, at this time, the force storage spring 243 is in the original length state, during the closing process, the induction wheel 230 can guide the abutting section 242 to slide in the sliding groove 311 through the linkage, the jacking rod 240 slides from the waiting station to the jacking station, at this time, the limiting piece is in the state of limiting the sliding of the abutting section 242 in the axial direction of the abutting section 242, the force storage spring 243 gradually stores force, the length of the driving section 241 inserted into the inside of the abutting section 242 gradually increases, when the jacking rod 240 moves to the jacking station, the abutting section 242 moves to the other end of the sliding groove 311, the limiting piece releases the limitation on the sliding of the abutting section 242 in the axial direction of the abutting section 242, at this time, the force storage spring 243 releases force quickly, under the driving of the force storage spring 243, the abutting section 242 abuts against the outer surface of the upper contact 221.

[0049] In one of the embodiments, the linkage comprises a sliding block 320, a push rod 330 and a plurality of second push blocks 340, the sliding block 320 is slidingly connected to the outside of the abutting section 242, the sliding block 320 is slidingly arranged in the sliding groove 311, when the limiting member limits the sliding of the abutting section 242 along the axis direction of the abutting section 242, the sliding block 320 is in a synchronous motion state with the abutting section 242. The second push blocks 340 are arranged in plurality, the plurality of second push blocks 340 are uniformly fixedly arranged in the circumferential direction of the induction wheel 230, further, the induction wheel 230 is arranged as a regular polygon, the contour of the induction wheel 230 is the same as the contour of the conductive wheel 210, and each second push block 340 is fixedly arranged on one edge of the induction wheel 230. The push rod 330 is fixedly arranged on the sliding block 320, and the rotation of the induction wheel 230 in the closing process can push the push rod 330 through one of the second push blocks 340, so that the sliding block 320 slides in the sliding groove 311.

[0050] In one of the embodiments, the inner side wall of the mounting block 310 is provided with a guide groove 350, the guide groove 350 has a first section 351, a second section 352 and a third section 353, the first section 351 and the second section 352 are both arranged as circular arcs, the radii of the first section 351 and the second section 352 are different, one end of the first section 351 and one end of the second section 352 are communicated, and the third section 353 communicates the other end of the first section 351 and the other end of the second section 352, the communication point of the first section 351 and the second section 352 is defined as point C, the communication point of the first section 351 and the third section 353 is defined as point B, and the communication point of the second section 352 and the third section 353 is defined as point A. After the closing is completed, the distance between point A and the upper contact 221 is equal to the distance between point C and the upper contact 221, and the distance between point B and the upper contact 221 is greater than the distance between point A and the upper contact 221. The driving block 360 is arranged at one end of the driving section 241 outside the abutting section 242, the driving block 360 can slide in the first section 351, the second section 352 and the third section 353, and in the initial state, the driving block 360 is located at point B, in the closing process, the jacking rod 240 gradually moves from the waiting station to the pushing station, and in the process of sliding along the sliding groove 311, the driving block 360 gradually moves from point B to point C through the first section 351, in this process, the abutting section 242 is in a state of being unable to slide along the axis direction of the abutting section 242, the length of the driving section 241 inserted into the abutting section 242 gradually increases, so that the force storage torsional spring gradually stores force, and further provides power for the abutting section 242 to quickly approach the upper contact 221.

[0051] In one of the embodiments, the sliding block 320 is fixedly provided with a reset rod 410, and the reset rod 410 is connected with the first terminal rack 120 through a reset tension spring 420. In the initial state, the reset tension spring 420 is in the original length state. The depth of the first section 351 is in the gradual change state, and the depth of the first section 351 close to the C point is smaller than the depth of the first section 351 close to the B point, so that the step state is formed at the position where the first section 351 and the second section 352 are communicated. The second section 352 close to the C point is provided with a first limiting groove, and a limiting block 430 is slidably arranged in the first limiting groove. The limiting block 430 can completely enter the first limiting groove, and part of the limiting block 430 can also be separated from the first limiting groove. In the initial state, part of the limiting block 430 is outside the first limiting groove. When the driving block 360 moves to the end of the second section 352 close to the C point, the first section 351 and part of the limiting block 430 separated from the first limiting groove jointly limit the movement of the driving block 360, so as to ensure that the jacking rod 240 is in the state of stably abutting against the upper contact 221 after the closing is completed. The limiting block 430 is used to completely enter the first limiting groove when the fuse is burned out. Further, a thermal shrinkage cylinder is arranged outside the mounting block 310, a connecting rod is fixedly connected to the power output shaft of the thermal shrinkage cylinder, and the connecting rod is fixedly connected with the limiting block 430. When the fuse is burned out, the length of the thermal shrinkage cylinder is elongated, and the thermal shrinkage cylinder pulls the limiting block 430 into the first limiting groove through the connecting rod. In this embodiment, the thermal shrinkage cylinder is filled with silicon oil, and the silicon oil in the thermal shrinkage cylinder can quickly expand when the fuse is burned out, so as to ensure that the limiting block 430 can quickly make a corresponding response. In other embodiments, a fixed sleeve is arranged outside the mounting block 310, the fixed sleeve has a sliding cavity inside, a permanent magnet column is slidably arranged in the sliding cavity, a wire is wound around the outer side of the permanent magnet column, the two ends of the wire are arranged at the two ends of the fuse, a connecting rod is fixedly connected to the lower end of the permanent magnet column, and the connecting rod is fixedly connected with the limiting block 430. After the closing is completed, part of the current passes through the wire, so that the permanent magnet column generates an electromagnetic force, and the electromagnetic force is transmitted through the connecting rod, so that part of the limiting block 430 extends out of the first limiting groove. When the fuse is burned out, the current no longer passes through the wire, so that the electromagnetic force of the permanent magnet column disappears, and under the action of the connecting rod and the gravity of the permanent magnet column itself, the limiting block 430 completely enters the first limiting groove.

[0052] In one of the embodiments, the abutting section 242 is provided with a reset spring 244 between one end inside the mounting cavity and the inner side wall of the mounting cavity. In the initial state, the reset spring 244 is in the original length state, and the stiffness coefficient of the reset spring 244 is much smaller than that of the force storage spring 243. When the closing is completed, the force storage spring 243 can drive the abutting section 242 to quickly abut against the upper contact 221, and the abutting section 242 can drive the force storage spring 243 to store force during the movement. After the fuse is burned out, the jacking rod 240 moves from the pushing station to the waiting station, at this time, the driving block 360 gradually approaches the point A along the second section 352, the abutting section 242 changes the position of abutting against the upper contact 221, and during the movement of the jacking rod 240 from the pushing station to the waiting station when the fuse is burned out, the limiting part no longer limits the sliding of the abutting section 242 in the direction of the axis thereof, and the reset force of the force storage spring 243 can ensure that the abutting section 242 keeps abutting against the upper contact 221. Since the contact position of the abutting section 242 with the upper contact 221 changes, the extrusion force of the abutting section 242 on the upper contact 221 can accelerate the upper contact 221 to separate from the abutting conductive wheel 210, and then accelerate the separation of the upper contact 221 from the conductive wheel 210. When the driving block 360 moves to the position of the point A, at this time, the reset spring 244 drives the abutting section 242 to move inside the mounting cavity. Since the stiffness coefficient of the reset spring 244 is greater than that of the force storage spring 243, the force storage spring 243 will not be deformed, but will be transmitted through the force storage spring 243, so that the driving block 360 moves from the point A to the position of the point B along the third section 353.

[0053] In one of the embodiments, the limiting part includes a limiting arc plate 440, a second limiting groove 450 and a movable groove 460. The limiting arc plate 440 is fixedly arranged on the mounting block 310, and the second limiting groove 450 and the movable groove 460 are arranged on the outer side wall of the abutting section 242. The width of the second limiting groove 450 is equal to the thickness of the limiting arc plate 440, and the width of the movable groove 460 is greater than the thickness of the limiting arc plate 440. The two ends of the limiting arc plate 440 are provided with notches. In the initial state, the limiting arc plate 440 is not in the second limiting groove 450 or the movable groove 460. During the closing process, the limiting arc plate 440 enters the second limiting groove 450, so that the abutting section 242 cannot freely slide in the direction of the axis thereof. When the jacking rod 240 moves to the pushing station, the abutting section 242 moves to the position of the notches of the limiting arc plate 440, so that the abutting section 242 can freely slide in the direction of the axis thereof. When the fuse is burned out, the jacking rod 240 moves from the pushing station to the waiting station, at this time, the limiting arc plate 440 enters the movable groove 460, so that the abutting section 242 can slide in the direction of the axis thereof.

[0054] In one of the embodiments, the driving block 360 is provided with a plug-in slot, the driving rod 470 is slidably plugged into the plug-in slot, and the plug-in slot and the driving rod 470 are provided with a jacking spring, which is used to drive the driving rod 470 to abut against the bottom of the first section 351, the second section 352 and the third section 353, thereby ensuring that no motion interference occurs when the driving block 360 slides in the first section 351.

[0055] In one of the embodiments, the first terminal block 120 is provided with a sliding sleeve 480, which is slidably connected to a guide slot, and the rotating shaft 211 is unidirectionally connected to the sliding sleeve 480; the jacking member is a compression spring, which is arranged between the sliding sleeve 480 and the first terminal block 120. Specifically, the rotating shaft 211 is unidirectionally connected to the sliding sleeve 480, which prevents the rotating shaft 211 from reversely rotating when the external environment acts on the upper contact 221, thereby ensuring that the jacking rod 240 in the two sets of jacking assemblies stably abuts against the upper contact 221.

[0056] In one of the embodiments, the placing slot is provided with a buffer sleeve 490, which is arranged in a half-arc shape with an opening, and the inner side wall of the buffer sleeve 490 is provided with a half-tooth block; the lower contact 222 is provided with a conductive column, and the conductive column is fixedly provided with an engaging block; in the initial state, the opening of the buffer sleeve 490 is arranged upward, and in the process of assembling the fuse, the worker needs to first fix the connecting sheet 111 on the electric pole, and then fix the conductive column on the lower contact 222 in the buffer sleeve 490, so as to ensure that the half-tooth block and the engaging block are engaged, and the wear of the conductive column and the placing slot is reduced by arranging the buffer sleeve 490.

[0057] The above only describes the preferred embodiments 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 principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high voltage fuse, characterized in that, The utility model relates to an insulator, the upper end of the insulator is fixedly provided with a first terminal block, and the lower end of the insulator is fixedly provided with a second terminal block. The utility model relates to a conductive wheel, the conductive wheel is a regular polyhedral structure, the conductive wheel is coaxially fixedly provided with a rotating shaft, the first terminal block is provided with a guide groove, the rotating shaft can rotate and slide in the guide groove, the first terminal block is provided with a tightening piece, the tightening piece can drive the rotating shaft to slide to the lower end of the guide groove, or the tightening piece can drive the rotating shaft to generate the tendency of sliding to the lower end of the guide groove, the conductive wheel is provided with a plurality of first driving blocks. The utility model relates to a fuse tube, the inside of the fuse tube can install fuse, the fuse tube has upper contact and lower contact, the lower contact can be hinged to the second terminal block, in the process of closing, the upper contact can drive one of the first driving blocks, and the upper contact can push the conductive wheel. The utility model relates to an auxiliary assembly, which is used for pushing the upper contact after closing. The auxiliary assembly includes two sets of pushing assemblies, each set of the pushing assembly includes an induction wheel and a tightening rod, the induction wheel is coaxially rotatably connected to the conductive wheel, the first terminal block is provided with a reverser, the reverser is used for driving the induction wheel to rotate reversely at the same time when the conductive wheel rotates, the tightening rod can be telescopically arranged, the first terminal block is provided with a mounting block, the tightening rod is slidably arranged on the mounting block, the tightening rod has a waiting station and a pushing station on the mounting block, the tightening rod is initially set to be in the waiting station, in the process of closing, the induction wheel can guide the tightening rod to slide from the waiting station to the pushing station, when closing is completed, the tightening rod can be quickly elongated in the pushing station and abut against the upper contact. The mounting block has a mounting cavity, the side wall of the mounting block is provided with a sliding groove communicating with the mounting cavity and the external environment, the tightening rod includes a driving section and an abutting section, the driving section is slidably inserted into the abutting section, the abutting section can abut against the upper contact, one end of the abutting section extends to the mounting cavity through the sliding groove, the abutting section is provided with a linkage, in the process of closing, the induction wheel can guide the abutting section to slide in the sliding groove through the linkage. The mounting block is provided with a limiting piece, the limiting piece can limit the sliding of the abutting section in the axial direction, when the sliding block slides to the end of the sliding groove, the limiting piece releases the limitation of the sliding of the abutting section in the axial direction. The utility model relates to a force storage spring arranged between one end of the driving section in the abutting section and the inside of the abutting section, when the tightening rod is in the waiting station, the abutting section is at one end of the sliding groove, the force storage spring is in the unforce storage state, when the tightening rod slides from the waiting station to the pushing station, the force storage spring gradually stores force, when the tightening rod moves to the pushing station, the abutting section moves to the other end of the sliding groove, the force storage spring quickly releases force. ​ 2. A high voltage fuse according to claim 1, characterized in that: The linkage comprises a sliding block, a pushing rod and second pushing blocks, the sliding block is slidingly connected to the outside of the abutting section, and the sliding block is slidingly arranged in the sliding groove; the second pushing blocks are arranged in plurality, and the second pushing blocks are uniformly fixed in the circumferential direction of the induction wheel; the pushing rod is fixed on the sliding block, and the rotation of the induction wheel can push the pushing rod through one of the second pushing blocks during the closing process, so that the sliding block slides in the sliding groove.

3. A high voltage fuse according to claim 1, characterized in that: The inner side wall of the mounting block is provided with a guide groove, the guide groove has a first section, a second section and a third section, the first section and the second section are arranged in circular arc shape, the radii of the first section and the second section are different, one end of the first section and one end of the second section are communicated, and the third section communicates the other end of the first section and the other end of the second section, the communication point of the first section and the second section is defined as point C, the communication point of the first section and the third section is defined as point B, and the communication point of the second section and the third section is defined as point A, the distance between the A point and the upper contact after closing is equal to the distance between the C point and the upper contact, and the distance between the B point and the upper contact is greater than the distance between the A point and the upper contact; the driving section is provided with a driving block at one end outside the abutting section, the driving block can slide in the first section, the second section and the third section, and in the initial state, the driving block is located at the B point, and during the closing process, the driving block gradually approaches the C point from the B point through the first section.

4. A high voltage fuse according to claim 3, characterized in that: A reset rod is fixedly arranged on the sliding block, a reset tension spring is connected between the reset rod and the first terminal block, and in the initial state, the reset tension spring is in the original length state; the depth of the first section is in a gradual change state, the depth of the first section near the C point position is smaller than the depth of the first section near the B point; a first limiting groove is arranged at the position near the C point of the second section, a limiting block is slidingly arranged in the first limiting groove, the limiting block can completely enter the first limiting groove, and part of the limiting block can also be separated from the first limiting groove; when the driving block moves to the end of the second section near the C point, the first section and the limiting block separated from the first limiting groove jointly limit the movement of the driving block; the limiting block is used for completely entering the first limiting groove when the fuse is burned out.

5. A high voltage fuse according to claim 3, characterized in that: A reset spring is arranged between the end of the abutting section inside the mounting cavity and the inner side wall of the mounting cavity, and in the initial state, the reset spring is in the original length state, and the stiffness coefficient of the reset spring is much smaller than the stiffness coefficient of the force storage spring.

6. A high voltage fuse according to claim 3, characterized in that: The limiting piece comprises a limiting arc plate, a second limiting groove and a movable groove, the limiting arc plate is fixedly arranged on the mounting block, the second limiting groove and the movable groove are arranged at intervals on the outer side wall of the abutting section, both ends of the limiting arc plate are provided with notches, in the process of closing, the limiting arc plate enters the second limiting groove, when the fuse is burnt out, the limiting arc plate enters the movable groove.

7. A high voltage fuse according to claim 3, characterized in that: The driving block is provided with a plug-in groove, a driving rod is slidably plugged in the plug-in groove, the plug-in groove and the driving rod are provided with a jacking spring, and the jacking spring is used to drive the driving rod to abut against the bottom of the first section, the second section and the third section.

8. A high voltage fuse according to claim 1, characterized in that: The first wiring rack is provided with a sliding sleeve, the sliding sleeve is slidably connected to a guide groove, the rotating shaft is unidirectionally connected to the sliding sleeve; the jacking piece is a compression spring, and the compression spring is arranged between the sliding sleeve and the first wiring rack.

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