A quickly replaceable fuse

Abstract

The present invention discloses a quick-change fuse, which relates to the technical field of fuses and includes a housing, a fuse element, and a heat conducting plate. The fuse element is installed in the housing through a terminal block. The fuse element includes a melting area and a non-melting area, and the melting area is more easily melted than the non-melting area. The heat conducting plate is arranged in the housing and distributed around the fuse element. The heat conducting plate includes a first heat conducting plate and a second heat conducting plate. The first heat conducting plate faces the melting area and corresponds to the melting area, and the second heat conducting plate faces the non-melting area and corresponds to the non-melting area. The first heat conducting plate is arranged in a dispersed manner in the direction from the fuse element to the housing, and the second heat conducting plate is arranged in a concentrated manner in the direction from the melt element to the housing. The fuse provided by the present invention has strong heat dissipation performance and can dissipate heat in the fuse element in a relatively short time, facilitating rapid replacement or maintenance of the fuse element and solving the problem of time-consuming fuse replacement.

Description

Technical Field

[0001] The present invention relates to the technical field of fuses, and in particular to a quick-replacement fuse. Background Art

[0002] An enclosed fuse typically consists of a fuse tube, contacts, and a base. The fuse tube is filled with a melt, which melts when excessive current flows, protecting the circuit. Contacts are typically installed at both ends of the fuse tube for connection to the circuit. The base supports and secures the fuse tube. The advantage of this type of fuse lies in its enclosed design, which effectively prevents the external environment from affecting the fuse's internal structure, ensuring proper operation.

[0003] In existing enclosed fuses, when a short circuit occurs, the internal fuse will melt. When the fuse blows, the temperature inside the fuse will rise sharply. When the fuse is replaced, the staff must wait until the temperature of the fuse drops to a certain level due to the high temperature. This makes the replacement time longer and is not conducive to the staff's timely repair of the circuit. Summary of the Invention

[0004] The present invention provides a quick-replacement fuse, which has strong heat dissipation performance and can dissipate heat in the fuse in a short time, thereby facilitating quick replacement or maintenance of the fuse and solving the problem of time-consuming fuse replacement.

[0005] A quick-change fuse of the present invention adopts the following technical solution:

[0006] A quick-change fuse comprises a shell, a fuse element and a heat conducting plate. The fuse element is installed in the shell through a terminal block. The fuse element comprises a melting area and a non-melting area. The melting area is easier to be melted than the non-melting area. The heat conducting plate is arranged in the shell and distributed around the fuse element. The heat conducting plate comprises a first heat conducting plate and a second heat conducting plate. The first heat conducting plate faces the melting area and corresponds to the melting area, and the second heat conducting plate faces the non-melting area and corresponds to the non-melting area. The first heat conducting plate is arranged in a dispersed manner in the direction from the fuse element toward the shell, and the second heat conducting plate is arranged in a concentrated manner in the direction from the fuse element toward the shell.

[0007] Furthermore, the shell includes a first shell, a second shell and a cover body, and two of the first shell and the second shell are provided. The heat conductive plates are respectively arranged on the first shell and the second shell, and the two first shells and the two second shells are symmetrically arranged with respect to the melt. The side ends of the first shell and the second shell are butted against each other to form a complete cylindrical structure. The cover body is arranged at both ends of the cylindrical structure to limit the movement of the cylindrical structure and the melt.

[0008] Furthermore, the melt is a long sheet-like structural member, the two side ends of the melt correspond to the two first shells respectively, and the two side surfaces of the melt correspond to the two second shells respectively. The arrangement of the heat conducting plates arranged on the second shells is denser than that of the heat conducting plates arranged on the first shells.

[0009] Furthermore, the fuse includes a first section and a second section, the first section is the melting zone, the second section is the non-melting zone, the first section and the second section are integrally arranged, and in a direction perpendicular to the axial direction of the shell, the cross-sectional width of the first section is smaller than the cross-sectional width of the second section.

[0010] Furthermore, the shell is filled with quartz sand.

[0011] Furthermore, in a direction parallel to the radial direction of the shell, the particle size of the quartz sand close to the melt is smaller than the particle size of the quartz sand close to the shell;

[0012] In a direction parallel to the axial direction of the shell, the particle size of the quartz sand close to the melting area is smaller than the particle size of the quartz sand close to the non-melting area.

[0013] Furthermore, the cover body includes a limiting cylinder and a reinforcement sleeve. The limiting cylinder is arranged at both ends of the cylindrical structure and is interference fit with the cylindrical structure. The reinforcement sleeve is threadedly connected to the limiting cylinder. A limiting component for limiting the movement of the cylindrical structure and the melt is provided between the reinforcement sleeve and the limiting cylinder.

[0014] Furthermore, the limiting assembly includes a limiting plate, which is arranged at one end of the limiting cylinder away from the cylindrical structure, and a limiting block is provided on the side of the limiting plate facing the limiting cylinder, and the limiting cylinder and the cylindrical structure are both provided with interconnected limiting slots at one end facing the limiting plate, and the limiting block is adapted to the limiting slot, and the limiting block can be inserted into the limiting slot to realize the synchronous rotation of the limiting cylinder, the cylindrical structure and the limiting plate.

[0015] Furthermore, the limit assembly also includes a stop gasket, which is clamped between the limit plate and the end plate of the reinforcement sleeve. A limit hole is provided on the limit plate, and a stop hole communicating with the limit hole is provided on the stop gasket. One end of the terminal block extends out of the cylindrical structure, passes through the corresponding limit hole and the stop hole, and extends from the end port of the reinforcement sleeve to the outside of the shell. The stop gasket is used to limit the movement of the terminal block in the shell.

[0016] Furthermore, the limiting plate is a clamping plate on one side of the limiting cylinder, the clamping plate is inserted into the limiting cylinder and forms a limiting channel with the inner side wall of the limiting cylinder, and the cylindrical structure is inserted into the limiting channel.

[0017] The beneficial effects of the present invention are:

[0018] A quick-change fuse of the present invention has a fusing zone with a smaller cross-sectional area on the fuse element. When a circuit fault causes the current flowing through the fuse element to suddenly increase, the temperature of the fusing zone with a smaller cross-sectional area rises faster, thereby enabling rapid fusing. By providing a heat conducting plate on the housing, the heat emitted by the fuse element can be quickly transferred to the housing and then dissipated to the outside by the housing. The first heat conducting plates facing the fusing zone are arranged in a dispersed manner from the inside to the outside, so that the first heat conducting plates facing the fusing zone are arranged more densely. The heat conducting plates with a higher density also have a greater heat conductivity, thereby enabling the heat generated in the fusing zone to be quickly transferred to the housing, accelerating the heat dissipation of the fuse element. In addition, during the heat transfer process, the intervals between adjacent first heat conducting plates become increasingly larger, which is more conducive to heat dissipation.

[0019] Secondly, the heat conducting sheet can divide the arc generated in the melting zone and has an arc extinguishing effect, and the first heat conducting sheet and the second heat conducting sheet in the same housing cooperate with each other to make the heat dissipation time of the melting zone and the non-melting zone tend to be consistent, and this heat dissipation time is necessarily shorter than the natural heat dissipation time of the melt in the present invention, which can achieve rapid heat dissipation of the present invention and can achieve faster replacement of the present invention;

[0020] Furthermore, the quartz sand filled in the shell can accelerate the transfer of heat generated by the melt, and the small-particle quartz sand filled in the melting zone can cut the arc generated in the melting zone into thinner branches, which can accelerate the cooling and deionization of the melting zone. The larger-particle quartz sand away from the melting zone can release the thermal pressure generated by the high temperature near the melt to one side of the shell more quickly, which can accelerate the release of pressure and thus accelerate the cooling of the present invention, helping the staff to replace the fuse more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the overall structure of a quick-replacement fuse provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the explosion structure of a quick-replacement fuse provided in an embodiment of the present invention;

[0024] Figure 3 A top view of a quick-change fuse provided by an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction;

[0026] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part C;

[0027] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0028] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of part D.

[0029] In the figure: 100, shell; 110, first shell; 120, second shell; 130, cover; 131, limiting cylinder; 132, reinforcement sleeve; 200, melt; 210, melting area; 220, non-melting area; 300, heat conducting plate; 310, first heat conducting plate; 320, second heat conducting plate; 400, terminal block; 410, first plate; 420, second plate; 610, limiting plate; 611, limiting block; 620, stopping gasket; 700, splint; 800, limiting slot. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] like Figures 1 to 4 As shown, an embodiment of the present invention provides a quick-replacement fuse, comprising a housing 100, a fuse element 200, and a heat-conducting sheet 300. The housing 100 is a cylindrical structural member, and specifically can be a cylindrical ceramic shell. The fuse element 200 is installed in the housing 100 through a terminal block 400. The staff can independently select a suitable fuse element 200 according to the application scenario of the present invention. Generally, the fuse element 200 is made of copper, silver, tin alloy, etc. The fuse element 200 includes a melting area 210 and a non-melting area 220. The melting area 210 is more easily melted than the non-melting area 220.

[0034] The material of the melting area 210 can be different from the material of the non-melting area 220. When the material of the melting area 210 and the non-melting area 220 is the same, the cross-sectional area of the melting area 210 in the direction perpendicular to the axial direction of the housing 100 is smaller than the cross-sectional area of the non-melting area 220. When the current is the same, the melting area 210 generates more heat than other parts in the same time period, making it easier to melt. When the material of the melting area 210 and the non-melting area 220 is different, the melting point of the melting area 210 is lower than the melting points of other parts. As a result, after a short circuit occurs, the melting area 210 can melt faster at the same current. In addition, the cross-sectional area of the melting area 210 made of different materials can also be smaller, making it easier to melt at the same current, thereby protecting the circuit safety more promptly.

[0035] Terminal blocks 400 can be bolted to both ends of the melt 200. Terminal blocks 400 can be copper plates, and their cross-sectional area parallel to the axis of the housing 100 is larger than that of the melt 200. The end of terminal block 400, away from the melt 200, extends through the corresponding end of the housing 100 and can be electrically connected to an external circuit.

[0036] It should be noted that, in the present invention, it is assumed that there are gaps between the thermal conductive sheets 300, and the gaps can always maintain the normal flow of heat on the thermal conductive sheets 300. Within a unit area, the density of the thermal conductive sheets 300 is always positively correlated with the thermal conductivity of the thermal conductive sheets 300. There is no factor that reduces the thermal conductivity of the thermal conductive sheets 300 due to the thermal conductive sheets 300 being too dense.

[0037] The heat conducting sheet 300 is disposed within the housing 100 and is distributed around the melt 200. The heat conducting sheet 300 can be a fan-shaped heat conducting sheet 300 with a certain curvature, and the heat conducting sheet 300 can be an insulating sheet made of ceramic material. The heat conducting sheet 300 includes a first heat conducting sheet 310 and a second heat conducting sheet 320. Multiple first heat conducting sheets 310 and second heat conducting sheets 320 are provided within the housing 100. The first heat conducting sheet 310 is located within the housing 100 near and corresponding to the melting zone 210 of the melt 200. The first heat conducting sheets 310 are dispersedly arranged at equal angles from the inside to the outside, that is, from the melt 200 to one side of the housing 100. The second heat conducting sheets 320 are located near and corresponding to the non-melting zone 220. The second heat conducting sheets 320 are clustered at equal angles from the inside to the outside, that is, from the melt 200 to one side of the housing 100.

[0038] Since the first heat conducting sheets 310 facing the melting region 210 are arranged in a dispersed manner, this means that the ends of the first heat conducting sheets 310 closest to the melt 200 all face the melting region 210, and the first heat conducting sheets 310 are densely arranged in the melting region 210, while the first heat conducting sheets 310 facing the housing 100 are more sparsely arranged. The second heat conducting sheets 320 facing the non-melting region 220 are arranged in a clustered manner, which means that the ends of the second heat conducting sheets 320 closest to the melt 200 all face the non-melting region 220, and the second heat conducting sheets 320 are more sparsely arranged in the non-melting region 220, while the second heat conducting sheets 320 facing the housing 100 are more densely arranged. The more densely arranged first heat conducting sheets 310 can more quickly conduct heat within the melting zone 210 to the housing 100. Since the heat conducting sheets 300 near the melting zone 210 are dispersed from the inside to the outside, the distance between adjacent heat conducting sheets 300 in the direction perpendicular to the axial direction of the housing 100 gradually increases. The increased gap is beneficial to heat dissipation of the heat conducting sheets 300.

[0039] The heat conducting sheets 300 away from the melting area 210 are arranged at equal angles and converged from the melt 200 toward one side of the housing 100. This allows the heat conducting sheets 300 in the non-melting area 220 to complement the heat conducting sheets 300 in the melting area 210, making better use of the space within the housing 100 and achieving the purpose of rapid heat dissipation of the present invention.

[0040] The operating principle of the present invention is:

[0041] When the two terminal blocks 400 of the present invention are electrically connected in a suitable circuit, when a short circuit occurs in the circuit, causing the current flowing through the fuse 200 to suddenly increase, the melting area 210 can be quickly melted to protect the circuit safety; the heat generated by the melting area 210 can be quickly transferred to the housing 100 through the first heat conducting plates 310 arranged in a dispersed manner near the melting area 210, and the heat generated by the non-melting area 220 can be quickly transferred to the housing 100 through the second heat conducting plates 320 arranged in a concentrated manner near the non-melting area 220, and then dissipated from the housing 100 to the outside;

[0042] Since the first heat conducting sheets 310 are more densely arranged toward the melting area 210, the heat conduction capacity is also greater, and the heat generated by the melting area 210 can be quickly conducted to the housing 100, so that the present invention dissipates heat quickly. In addition, during the heat transfer process of the first heat conducting sheets 310, the intervals between adjacent first heat conducting sheets 310 in the radial direction of the housing 100 will become larger and larger, which is more conducive to heat dissipation.

[0043] Secondly, the heat conducting sheet 300 can divide the arc generated by the melting area 210 and has an arc extinguishing effect. The first heat conducting sheet 310 and the second heat conducting sheet 320 cooperate with each other to make the heat dissipation time of the melting area 210 and the non-melting area 220 tend to be consistent. Specifically:

[0044] In the direction parallel to the axial direction of the housing 100, the second heat conducting sheet 320 adjacent to the melting zone 210 is longer and has a higher temperature than the other second heat conducting sheets 320, and the heat transfer speed on the corresponding heat conducting sheet 300 is faster. The second heat conducting sheet 320 farther from the melting zone 210 is shorter, and the temperature of the corresponding non-melting zone 220 is also lower, and the heat transfer speed on the corresponding heat conducting sheet 300 is slower. The heat dissipation time of this long distance but fast speed and the heat dissipation time of the close distance but slow speed will tend to be consistent. Therefore, the heat transfer or heat dissipation time of the second heat conducting sheet 320 adjacent to the melting zone 210 and the heat dissipation time of the second heat conducting sheet 320 farther from the melting zone 210 will tend to be consistent. Due to the provision of the heat conducting sheet 300, the heat dissipation time of the second heat conducting sheet 320 must be lower than the natural heat dissipation time of the melt 200.

[0045] Similarly, the heat dissipation time of each of the dispersed first heat conducting sheets 310 will also tend to be consistent, and the heat dissipation time of the first heat conducting sheets 310 will inevitably be shorter than the natural heat dissipation time of the melt 200. Therefore, the heat dissipation time of both the first heat conducting sheet 310 and the second heat conducting sheet 320 will be shorter than the heat dissipation time of the melt 200 itself. Moreover, since the first heat conducting sheet 310 and the second heat conducting sheet 320 are both located in the same housing 100, the heat dissipation time of the first heat conducting sheet 310 will eventually tend to be consistent with the heat dissipation time of the second heat conducting sheet 320. The heat dissipation time that eventually tends to be consistent will inevitably be shorter than the heat dissipation time of the melt 200 itself, thereby achieving the rapid cooling and rapid replacement of the present invention.

[0046] In addition, the dispersed arrangement of the first heat conducting sheets 310 and the clustered arrangement of the second heat conducting sheets 320 cooperate to more effectively utilize the internal space of the housing 100, maximizing heat dissipation and further shortening the heat dissipation time of the present invention. After heat dissipation, the fuse 200 or the present invention is more convenient to replace and repair, thereby resolving the time-consuming issue of fuse replacement.

[0047] In some embodiments, the housing 100 includes a first housing 110, a second housing 120, and a cover 130. Two first housings 110 and two second housings 120 are provided, and the two first housings 110 and the two second housings 120 are symmetrically arranged about the melt 200. The side ends of the first housing 110 and the second housing 120 abut against each other to form a complete cylindrical structure. The covers 130 are provided at both ends of the cylindrical structure to limit the movement of the cylindrical structure and the melt 200.

[0048] Specifically, the first shell 110 and the second shell 120 are both curved plates, and the cross-sectional radius of the curved plates is equal. The central angle corresponding to the cross-sectional area of the curved plates is 90 degrees. Four curved plates with a cross-sectional central angle of 90 degrees can be assembled to form a complete uncovered cylinder. Two covers 130 are provided, and the two covers 130 are respectively placed on the ends of the uncovered cylinder. The cylindrical shell 100 can reduce the impact of the external environment on the melt 200 and provide better protection for the melt 200.

[0049] In some embodiments, as Figures 4 to 7 The melt 200 is a long, sheet-like structure, specifically a copper sheet. The two first shells 110 correspond to the two side ends of the melt 200 and are symmetrically arranged about the central axis of the melt 200. The two second shells 120 correspond to the two side surfaces of the melt 200 and are also symmetrically arranged about the central axis of the melt 200.

[0050] In this embodiment, the density of the thermally conductive sheets 300 disposed on the first housing 110 is lower than the density of the thermally conductive sheets 300 disposed on the second housing 120. That is, in a direction parallel to the axial direction of the housing 100, within the same distance between the first housing 110 and the second housing 120, the number of thermally conductive sheets 300 disposed on the first housing 110 is less than the number of thermally conductive sheets 300 disposed on the second housing 120. The thermally conductive sheets 300 herein include a first thermally conductive sheet 310 and a second thermally conductive sheet 320.

[0051] Because the side surface area of the second shell 120 corresponding to the melt 200 is larger than the side end area of the first shell 110 corresponding to the melt 200, using the same material, a larger side surface of the melt 200 can transfer more heat, while a smaller end surface of the melt 200 can transfer less heat. When the melt 200 melts, the heat transferred from the side surface of the melt 200 is greater than the heat transferred from the end surface of the melt 200. Because the distance between the second shell 120 and the side of the melt 200 is farther than the distance between the first shell 110 and the side end of the melt 200, if the arrangement of the heat conducting plates 300 (the first heat conducting plate 310 and the second heat conducting plate 320) on the second shell 120 is more dense, the time required for the heat of the melt 200 to be transferred from the side of the melt 200 through the heat conducting plate 300 to the second shell 120 tends to be consistent with the time required for the heat of the melt 200 to be transferred from the side end of the melt 200 through the heat conducting plate 300 to the first shell 110, and this time is inevitably lower than the natural cooling time of the present invention.

[0052] Therefore, the denser heat conducting sheet 300 provided on the second shell 120 can transfer heat to the second shell 120 faster, thereby dissipating heat for the present invention faster, greatly shortening the heat dissipation time of the present invention and enabling rapid replacement of the present invention.

[0053] Furthermore, the melt 200 includes a first section and a second section. The first section is the melting zone 210, and the second section is the non-melting zone 220. The first and second sections are made of the same material and are integrally formed. In a direction perpendicular to the axial direction of the housing 100, the cross-sectional width of the first section is smaller than the cross-sectional width of the second section.

[0054] In this embodiment, the first and second sections are integrally formed and have equal thickness. In a direction perpendicular to the axial direction of the housing 100, the cross-sectional width of the first section is smaller than that of the second section, meaning that the cross-sectional area of the first section is smaller than that of the second section. For the same current, the smaller the cross-sectional area, the greater the resistance, and thus the greater the heat generated. In the event of a short circuit, the first section is more likely to fuse.

[0055] In some embodiments, housing 100 is filled with quartz sand (not shown). When the melting zone 210 of melt 200 melts, the arc formed by the quartz sand and the melting zone 210 has a large contact area, which can enhance heat absorption. Furthermore, the quartz sand can cut the arc into thinner branches, thereby accelerating cooling and deionization.

[0056] Furthermore, in a direction parallel to the radial direction of the housing 100 , the particle size of the quartz sand near the melt 200 is smaller than the particle size of the quartz sand near the non-melting area 220 ;

[0057] In a direction parallel to the axial direction of the housing 100 , the particle size of the quartz sand near the melting area 210 is smaller than the particle size of the quartz sand near the non-melting area 220 .

[0058] In this embodiment, when the melting zone 210 melts, an arc is generated, and the small-particle quartz sand can cut the arc into thinner branches, which can accelerate the cooling and deionization of the melt 200. However, the small-particle quartz sand will also hinder the flow of gas when extinguishing the arc, thereby causing the pressure in the shell 100 to increase. Although the large-particle quartz sand is weaker in extinguishing the arc, the large-particle quartz sand can not only increase the contact area with the heat, but also the gaps between the large-particle quartz sand are larger, and the pressure is released faster.

[0059] In the direction parallel to the radial direction of the shell 100, filling small-particle quartz sand near the melt 200 can cool down the melt 200 and conduct heat more quickly, while large-particle quartz sand away from the melt 200 can not only transfer heat, but also release the thermal pressure generated by the high temperature near the melt 200 to the side of the shell 100 more quickly, which is more conducive to the heat dissipation of the present invention.

[0060] In a direction parallel to the axial direction of the housing 100, the quartz sand near the melting zone 210 has a smaller particle size. The smaller quartz sand can cut the arc generated by the melting zone 210 into thinner branches, further accelerating the cooling and deionization of the melting zone 210. The larger quartz sand away from the melting zone 210 also accelerates heat transfer and cooling of the melt 200.

[0061] The quartz sand provided in the present invention can take into account the advantages of arc extinguishing efficiency, heat dissipation and pressure control, and can achieve faster cooling of the present invention, so that the staff can replace the new fuse more quickly.

[0062] In some embodiments, as Figure 2 and Figure 4 As shown, the cover body 130 includes a limiting cylinder 131 and a reinforcement sleeve 132. The limiting cylinder 131 is sleeved on both ends of the cylindrical structure and has an interference fit with the cylindrical structure. The reinforcement sleeve 132 is threadedly connected to the limiting cylinder 131. A limiting component for limiting the movement of the cylindrical structure and the melt 200 is provided between the reinforcement sleeve 132 and the limiting cylinder 131.

[0063] In this embodiment, the cylindrical structure formed by the side ends of the first shell 110 and the second shell 120 being butted against each other can maintain its cylindrical shape under the restriction of the limiting cylinder 131, thereby preventing the cylindrical structure from falling apart, and the interference fit between the cylindrical structure and the limiting cylinder 131 makes the connection between the cylindrical structure and the limiting cylinder 131 tighter.

[0064] The reinforcing sleeve 132 can further reinforce the limiting sleeve. The limiting assembly arranged between the reinforcing sleeve 132 and the limiting cylinder 131 can not only limit the rotation of the cylindrical structure in the limiting cylinder 131, but also limit the movement of the melt 200 in the cylindrical structure.

[0065] Furthermore, the limiting assembly includes a limiting plate 610, which is arranged at the end of the limiting cylinder 131 away from the cylindrical structure. A limiting block 611 is provided on the side of the limiting plate 610 facing the limiting cylinder 131. The limiting cylinder 131 and the end of the cylindrical structure facing the limiting plate 610 are both provided with interconnected limiting slots 800. The limiting block 611 is adapted to the limiting slot 800. The limiting block 611 is inserted into the limiting slot 800 to realize the synchronous rotation of the limiting cylinder 131, the cylindrical structure and the limiting plate 610.

[0066] In this embodiment, the limit block 611 on the limit plate 610 can limit the shell 100 or the cylindrical structure set on the limit cylinder 131, so that the limit plate 610 can rotate synchronously with the shell 100, and the limit cylinder 131 is threadedly connected to the reinforcement sleeve 132. Therefore, the limit plate 610 can prompt the reinforcement sleeve 132 to reinforce the shell 100, further reducing the possibility of disintegration of the shell 100 (cylindrical structure).

[0067] Furthermore, the stop assembly includes a stop washer 620, which is sandwiched between the stop plate 610 and the end plate of the reinforcement sleeve 132. The stop washer 620 is coaxial with the reinforcement sleeve 132, the stop cylinder 131, and the housing 100. The stop plate 610 defines a stop hole, and the stop washer 620 defines a stop hole that communicates with the stop hole. The end of the terminal block 400 extending from the cylindrical structure passes through the corresponding stop hole and the stop hole, and extends out of the housing 100 from the end port of the reinforcement sleeve 132.

[0068] Specifically, in the present invention, the terminal block 400 is a metal plate with a rectangular cross-section. The terminal block 400 includes a first plate 410 and a second plate 420 that are integrally arranged. In a direction parallel to the axial direction of the housing 100, the width of the first plate 410 is greater than the width of the second plate 420. The limiting hole provided on the limiting plate 610 and the stopping hole provided on the stopping gasket 620 are adapted to the second plate 420, that is, the limiting hole and the stopping hole are both rectangular holes adapted to the second plate 420. One end of the second plate 420 is fixed to one end of the melt 200 by a bolt, and the other end passes through the limiting hole and the stopping hole in sequence and is connected to the first plate 410. When the second plate 420 passes through the limiting hole and the stopping hole, the inner sidewalls of the limiting hole and the stopping hole contact the outer sidewalls of the second plate 420. The rectangular hole arrangement of the limiting hole and the stopping hole can limit the rotation of the second plate 420 within the housing 100, that is, the rotation of the terminal block 400 within the housing 100.

[0069] In a direction parallel to the axial direction of the housing 100, the width of the first plate 410 is greater than the width of the second plate 420. Therefore, the first plate 410 cannot pass through the limiting hole and the stop hole in a direction parallel to the axial direction of the housing 100. Since both ends of the melt 200 are connected to the terminal blocks 400, the melt 200 cannot move in a direction parallel to the axial direction of the housing 100 within the housing 100.

[0070] In the present invention, the stopping gasket 620 limits the movement of the terminal block 400 in the housing 100, thereby making the structure of the present invention more stable.

[0071] In some embodiments, a clamping plate 700 is provided on the side of the limiting plate 610 facing the limiting cylinder 131. The clamping plate 700 is inserted into the limiting cylinder 131 and forms a limiting channel with the inner wall of the limiting cylinder 131. One end of the cylindrical structure is inserted into the limiting channel.

[0072] Specifically, the clamping plate 700 is an arc-shaped plate fixed to the limiting block 611. When the limiting block 611 is inserted into the limiting notch 800 of the limiting cylinder 131, the clamping plate 700 is then inserted into the limiting cylinder 131, and a limiting channel is formed between the clamping plate 700 and the inner wall of the limiting cylinder 131. Thereafter, the cylindrical structure formed by the first shell 110 and the second shell 120 is inserted into the limiting cylinder 131, and the end of the cylindrical structure can be inserted into the limiting channel. When the limiting block 611 is inserted into the limiting notch 800 of the cylindrical structure and the cylindrical structure abuts against the limiting plate 610, the connection between the limiting plate 610 and the cylindrical structure is completed.

[0073] In this embodiment, the splint 700 can strengthen the structural strength of the tubular structure formed by the first shell 110 and the second shell 120 to prevent the tubular structure from falling apart due to vibration. The splint 700 can maintain the overall integrity of the tubular structure.

[0074] In addition, the split housing 100 of the present invention facilitates assembly of the present invention and facilitates filling the housing 100 with quartz sand of varying particle sizes, thereby better controlling the heat dissipation of the present invention.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quick-change fuse, characterized in that: include: Housing (100); A melt (200), the melt (200) being installed in the housing (100) via a terminal block (400), the melt (200) comprising a melting area (210) and a non-melting area (220), the melting area (210) being more easily melted than the non-melting area (220); a heat conducting sheet (300), the heat conducting sheet (300) being arranged in the housing (100) and distributed around the melt (200), the heat conducting sheet (300) comprising a first heat conducting sheet (310) and a second heat conducting sheet (320), the first heat conducting sheet (310) facing the melting area (210) and corresponding to the melting area (210), and the second heat conducting sheet (320) facing the non-melting area (220) and corresponding to the non-melting area (220); The first heat conducting plates (310) are arranged in a dispersed manner in a direction from the melt (200) toward the shell (100), and the second heat conducting plates (320) are arranged in a gathered manner in a direction from the melt (200) toward the shell (100).

2. The quick-change fuse according to claim 1, characterized in that: The shell (100) includes a first shell (110), a second shell (120) and a cover (130), and two of the first shell (110) and the second shell (120) are provided. The heat conducting plate (300) is respectively arranged on the first shell (110) and the second shell (120). The two first shells (110) and the two second shells (120) are symmetrically arranged with respect to the melt (200). The side ends of the first shell (110) and the second shell (120) are butted against each other to form a complete cylindrical structure. The cover (130) is arranged at both ends of the cylindrical structure to limit the movement of the cylindrical structure and the melt (200).

3. The quick-change fuse according to claim 2, characterized in that: The melt (200) is a long sheet-like structural member, the two side ends of the melt (200) correspond to the two first shells (110) respectively, and the two side surfaces of the melt (200) correspond to the two second shells (120) respectively. The arrangement of the heat conducting plates (300) arranged on the second shells (120) is denser than the arrangement of the heat conducting plates (300) arranged on the first shell (110).

4. The quick-change fuse according to claim 3, characterized in that: The melt (200) includes a first section and a second section, the first section is the melting zone (210), and the second section is the non-melting zone (220), the first section and the second section are integrally arranged, and in a direction perpendicular to the axial direction of the shell (100), the cross-sectional width of the first section is smaller than the cross-sectional width of the second section.

5. The quick-change fuse according to claim 3, characterized in that: The shell (100) is filled with quartz sand.

6. The quick-change fuse according to claim 5, characterized in that: In a direction parallel to the radial direction of the shell (100), the particle size of the quartz sand close to the melt (200) is smaller than the particle size of the quartz sand close to the shell (100); In a direction parallel to the axial direction of the housing (100), the particle size of the quartz sand close to the melting zone (210) is smaller than the particle size of the quartz sand close to the non-melting zone (220).

7. The quick-change fuse according to claim 2, characterized in that: The cover body (130) includes a limiting cylinder (131) and a reinforcing sleeve (132), wherein the limiting cylinder (131) is sleeved on both ends of the cylindrical structure and is interference-fitted with the cylindrical structure, and the reinforcing sleeve (132) is threadedly connected to the limiting cylinder (131), and a limiting component for limiting the movement of the cylindrical structure and the melt (200) is provided between the reinforcing sleeve (132) and the limiting cylinder (131).

8. The quick-change fuse according to claim 7, characterized in that: The limiting assembly comprises a limiting plate (610), wherein the limiting plate (610) is arranged at one end of the limiting cylinder (131) away from the cylindrical structure, and a limiting block (611) is provided on the side of the limiting plate (610) facing the limiting cylinder (131). The limiting cylinder (131) and the end of the cylindrical structure facing the limiting plate (610) are both provided with mutually communicating limiting slots (800), and the limiting block (611) is adapted to the limiting slot (800). When the limiting block (611) is inserted into the limiting slot (800), the synchronous rotation of the limiting cylinder (131), the cylindrical structure and the limiting plate (610) can be achieved.

9. The quick-change fuse according to claim 8, characterized in that: The limiting assembly also includes a stop gasket (620), which is clamped between the limiting plate (610) and the end plate of the reinforcement sleeve (132). A limiting hole is provided on the limiting plate (610), and a stop hole communicating with the limiting hole is provided on the stop gasket (620). One end of the terminal block (400) extends out of the cylindrical structure, passes through the corresponding limiting hole and the stop hole, and extends from the end port of the reinforcement sleeve (132) to the outside of the shell (100). The stop gasket (620) is used to limit the movement of the terminal block (400) in the shell (100).

10. The quick-change fuse according to claim 8, characterized in that: A clamping plate (700) is provided on one side of the limiting plate (610) facing the limiting cylinder (131). The clamping plate (700) is inserted into the limiting cylinder (131) and forms a limiting channel with the inner side wall of the limiting cylinder (131). The cylindrical structure is inserted into the limiting channel.

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