High-voltage fuse

Abstract

This utility model discloses a high-voltage fuse, relating to the field of high-voltage fuses. The utility model includes a housing, one end of which is connected to a fuse end cap one, and the other end of which is connected to a fuse end cap two. A fuse is installed between the fuse end cap one and the fuse end cap two. Spring one and spring two are respectively installed inside the housing. One end of spring one is connected to one side of the inner wall of the housing, and the other end of spring one is elastically connected to the fuse. This utility model, through the fuse and springs one and two, processes the fuse into a flat, rectangular shape, and makes both ends of the fuse flatter than the middle section, greatly reducing the bending resistance of the fuse. Furthermore, the internal addition of insulating springs provides upward and downward reaction forces on the fuse, greatly accelerating the fusing time and avoiding incomplete fuse failure.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage fuses, specifically high-voltage fuses. Background Technology

[0002] A high-voltage fuse is a high-voltage electrical protection device that uses a fusible element to heat up and melt under overload or short-circuit current to cut off the circuit and achieve fault isolation and equipment protection. It is generally composed of a fuse element (core fuse + insulating fuse tube), arc extinguishing medium, electrode connectors, supporting insulators, and an operation indicator mechanism.

[0003] Most current high-voltage fuses use a structure of a fuse wire and a non-transparent shell, which can ensure that the circuit will heat up and melt under overload or short circuit conditions. However, there is a problem in actual use: it is impossible to observe whether the fuse is in the process of melting under overload or short circuit conditions, and there may be a partial break in the fuse wire after melting. This undoubtedly increases the danger of the device. In view of this, the inventors urgently need to design an observable and interruption-proof high-voltage fuse to improve its safety. Utility Model Content

[0004] Therefore, the purpose of this invention is to provide a high-voltage fuse to solve the technical problems of unobservable and incomplete fuse operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage fuse, comprising a housing, one end of which is connected to a fuse end cap one, and the other end of which is connected to a fuse end cap two. A fuse is installed between the fuse end cap one and the fuse end cap two. Spring one and spring two are respectively installed inside the housing. One end of spring one is connected to one side of the inner wall of the housing, and the other end of spring one is elastically connected to the fuse. One end of spring two is connected to one side of the inner wall of the housing, and the other end of spring two is elastically connected to the fuse. The elastic directions of spring one and spring two are opposite.

[0006] By adopting the above technical solution, the inner wall of the outer casing, the inner wall of the fuse end cap one, and the spring one are elastically connected, and the inner wall of the outer casing, the inner wall of the fuse end cap two, and the spring two are also elastically connected. In this way, the elastic connection directions of spring one and spring two are opposite, which lays the foundation for the subsequent disconnection of the fuse.

[0007] Furthermore, the outer shell is made of high-temperature resistant transparent ceramic material, and the high-temperature resistant transparent ceramic material has anti-oxidation and corrosion resistance.

[0008] By adopting the above technical solution, the problem of not being able to observe the inside of the fuse can be solved in a targeted manner. When the circuit is overloaded or short-circuited, the fuse wire is observed to start heating and melting. At this time, the circuit can be disconnected in time, and the high-voltage fuse can be replaced under safe conditions.

[0009] Furthermore, spring one and spring two provide reaction forces on both sides of the fuse wire to prevent the fuse wire from partially breaking after it has melted.

[0010] By adopting the above technical solution, when the fuse starts to heat up and melt during the circuit overload or short circuit, there may be a situation of incomplete breakage or partial breakage during the fuse melting process, which may cause greater losses. At this time, the springs one and two provide a reaction force on both sides of the fuse, which can pull the fuse apart in time when it is about to melt, thus avoiding the situation of incomplete breakage.

[0011] Furthermore, the surfaces of spring one and spring two are treated with surface insulation by using an electrophoretic epoxy resin coating process.

[0012] By adopting the above technical solution, after the surfaces of springs 1 and 2 are insulated, the probability of circuit failure can be greatly reduced, and the metal spring material has greater elasticity and toughness.

[0013] Furthermore, the overall structure of the fuse wire is a flat cuboid, and the cross-sectional area and conductivity of the fuse wire remain unchanged.

[0014] By adopting the above technical solution, the fuse wire has a flat rectangular structure, which reduces the bending force of the fuse wire during the fusing process. The fuse wire can break more quickly and efficiently during the fusing process, which greatly enhances the fusing efficiency.

[0015] Furthermore, one end of the fuse wire is called fuse wire tip one, and the other end of the fuse wire is called fuse wire tip two. Both fuse wire tip one and fuse wire tip two are processed into a flatter structural shape while ensuring that the cross-sectional area of ​​the fuse wire tip one and the cross-sectional area of ​​the intermediate structure of the fuse wire remain unchanged.

[0016] By adopting the above technical solution, the two ends of the fuse wire are processed into a flatter structure. This structure can reduce the bending force of the two ends of the fuse wire on the spring during the melting process, which allows the spring to exert a greater force on the melting position of the fuse wire, greatly improving the melting efficiency.

[0017] Furthermore, the inner walls of the first and second fuse end caps are machined with slots corresponding to the bosses on the inner walls of the outer shell, and the first and second fuse end caps and the outer shell are connected to the bosses through the slots.

[0018] By adopting the above technical solution, the high-voltage fuse device is easy to install, greatly reducing installation time. The installation of the outer casing and the two fuse wire end caps is simple and clear, allowing beginners to become familiar with the structure of the high-voltage fuse device in a short time, thus greatly enhancing the applicability of the high-voltage fuse device.

[0019] In summary, the present invention has the following main advantages:

[0020] 1. This utility model uses a fuse wire and two springs to process the fuse wire into a flat rectangular shape and make the two ends of the fuse flatter than the middle section, which greatly reduces the bending resistance of the fuse wire. In addition, an insulating spring is installed inside. The spring exerts an up-and-down reaction force on the fuse wire, which greatly speeds up the melting time of the fuse and avoids the situation of false breakage.

[0021] 2. This utility model replaces the outer shell with a high-temperature resistant transparent ceramic material, which is resistant to oxidation and corrosion, making it easier to observe the fuse wire and understand its melting status. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0023] Figure 2 This is a side view of the structure of this utility model;

[0024] Figure 3 This utility model Figure 1 A magnified schematic diagram of the local structure at point A;

[0025] Figure 4 This utility model Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0026] In the diagram: 1. Fuse end cap one; 2. Fuse; 201. Fuse end one; 202. Fuse end two; 3. Spring one; 4. Spring two; 5. Fuse end cap two; 6. Outer casing. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In this embodiment:

[0029] High-voltage fuses, such as Figure 1-4As shown, the device includes a housing 6. One end of the housing 6 is connected to a fuse end cap 1, and the other end is connected to a fuse end cap 2. A fuse 2 is installed between fuse end caps 1 and 2. Inside the housing 6, springs 3 and 4 are installed respectively. One end of spring 3 is connected to one side of the inner wall of the housing 6, and the other end is elastically connected to the fuse 2. One end of spring 4 is connected to one side of the inner wall of the housing 6, and the other end is elastically connected to the fuse 2. The elastic directions of springs 3 and 4 are opposite. The inner walls of the housing, the inner wall of fuse end cap 1, and spring 1 and spring 2 are elastically connected. This makes the elastic connection directions of springs 1 and 2 opposite, laying the foundation for the subsequent fuse disconnection. At the same time, the opposite connection directions of springs 1 and 2 exert opposite forces on both ends of the fuse, improving the fusing effect and shortening the fusing time.

[0030] See Figure 2 The outer shell 6 is made of high-temperature resistant transparent ceramic material, which is resistant to oxidation and corrosion. This material can effectively solve the problem of not being able to observe the inside of the fuse. When the circuit is overloaded or short-circuited, the fuse wire can be observed to start heating and melting. At this time, the circuit can be disconnected in time, and the high-voltage fuse can be replaced under safe conditions. At the same time, the high-temperature resistant transparent ceramic material is helpful to observe whether the internal structure is damaged during the installation of the high-voltage fuse.

[0031] See Figure 1 , Figure 3 , Figure 4 Spring 3 and spring 4 provide reaction forces on both sides of fuse 2 to prevent incomplete breakage after fuse 2 melts. When the circuit is overloaded or short-circuited, the fuse starts to heat up and melt. During the melting process, incomplete breakage or incomplete breakage may occur, leading to greater losses. At this time, the reaction forces provided by spring 1 and spring 2 on both sides of the fuse can pull the fuse apart in time when it is about to melt, thus avoiding incomplete breakage. At the same time, the reaction forces provided by spring 1 and spring 2 on both sides of the fuse reduce the melting time of the fuse and can cleanly and neatly break the fuse so that the fuse wires will not reconnect and stick together.

[0032] See Figure 1 , Figure 3 , Figure 4 The surfaces of spring 3 and spring 4 were treated with surface insulation using an electrophoretic epoxy resin coating process.

[0033] Spring 1 and Spring 2 are metal springs. After the surface is insulated, the probability of circuit failure can be greatly reduced. In addition, the metal spring material has great elasticity and toughness. At the same time, the surface insulation treatment of the spring can take into account both the insulation and elasticity of the spring. The process is mature and the cost of use is low.

[0034] See Figure 1 The overall structure of the fuse 2 is a flat cuboid, and the cross-sectional area and conductivity of the fuse 2 remain unchanged. The flat cuboid structure of the fuse reduces the bending force of the fuse during the fusing process, allowing the fuse to break more quickly and efficiently, greatly enhancing the fusing efficiency. At the same time, the use of a flat cuboid structure in the fuse makes it easier to install springs at both ends of the fuse, improving the convenience of spring installation.

[0035] See Figure 1 , Figure 3 , Figure 4 One end of the fuse wire 2 is fuse wire tip 1 201, and the other end of the fuse wire 2 is fuse wire tip 202. Both fuse wire tip 1 201 and fuse wire tip 202 are processed into a flatter structural shape while ensuring that their cross-sectional areas remain the same as those of the intermediate structure of the fuse wire 2. The flatter structure at both ends of the fuse wire reduces the bending force of the fuse wire on the spring during the melting process. This allows the spring to exert a greater force on the melting position of the fuse wire, greatly improving the melting efficiency. At the same time, fuse wire tip 1 and fuse wire tip 2 have the same cross-sectional area as the intermediate structure of the fuse wire, which reduces the bending force of the fuse wire while maintaining the same conductivity.

[0036] See Figure 2The inner walls of fuse end cap 1 and fuse end cap 2 are machined with grooves corresponding to the bosses on the inner wall of the outer shell 6. Fuse end cap 1, fuse end cap 2, and outer shell 6 are connected to the bosses through the grooves. The high-voltage fuse device is easy to install, greatly reducing installation efficiency. The installation of the outer shell and the two fuse end caps is simple and clear. Beginners can become familiar with the structure of the high-voltage fuse device in a short time, which greatly enhances the applicability of the high-voltage fuse device. At the same time, it strengthens the stability of the high-voltage fuse structure and enhances the service life of the high-voltage fuse structure. The implementation principle of this embodiment is as follows: First, fuse 2 is installed in the center of the inner wall of fuse end cap 1 as the basic structure of the whole structure. Then, spring 3 is installed and connected to the bottom of fuse 2, so that spring 3 is in a compressed state and spring 3 exerts a certain pressure on fuse 2. Then, it is connected to the outer shell 6 through the slot of the inner wall of fuse end cap 1. The slot fixation allows fuse end cap 1 to be quickly connected to the outer shell. Next, spring 4 is connected and fixed above fuse 2, so that spring 4 exerts a certain pressure on fuse 2. Then, it is connected to the outer shell 6 through the slot of the inner wall of fuse end cap 5, thereby strengthening the overall structure of the high voltage fuse.

[0037] By installing spring 3 and spring 4 in opposite directions on the fuse 2, opposite forces will be generated on the two ends of the fuse 2. This can reduce the bending force of the fuse 2 when the circuit is short-circuited or overloaded, greatly improve the fusing effect of the fuse 2 when it is blown, and also enhance the stability of the overall structure of the high voltage fuse.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A high-voltage fuse, characterized in that: Includes a housing (6), one end of which is connected to a fuse end cap one (1), and the other end of which is connected to a fuse end cap two (5). A fuse (2) is installed between the fuse end cap one (1) and the fuse end cap two (5). Spring 1 (3) and Spring 2 (4) are respectively installed inside the outer shell (6). One end of Spring 1 (3) is connected to one side of the inner wall of the outer shell (6), and the other end of Spring 1 (3) is elastically connected to the fuse (2). One end of Spring 2 (4) is connected to one side of the inner wall of the outer shell (6), and the other end of Spring 2 (4) is elastically connected to the fuse (2). The elastic directions of Spring 1 (3) and Spring 2 (4) are opposite.

2. The high-voltage fuse according to claim 1, characterized in that: The outer shell (6) is made of high-temperature resistant transparent ceramic material, and the high-temperature resistant transparent ceramic material has anti-oxidation and corrosion resistance.

3. The high-voltage fuse according to claim 1, characterized in that: The springs 1 (3) and 2 (4) provide reaction forces on both sides of the fuse (2) to prevent the fuse (2) from being partially broken after it melts.

4. The high-voltage fuse according to claim 1, characterized in that: The surfaces of spring one (3) and spring two (4) were treated with surface insulation by using an electrophoretic epoxy resin coating process.

5. The high-voltage fuse according to claim 1, characterized in that: The two ends of the fuse wire (2) are rectangular flat structures, and the cross-sectional area of ​​the fuse wire (2) remains unchanged, and the conductivity remains unchanged.

6. The high-voltage fuse according to claim 1, characterized in that: One end of the fuse (2) is fuse tip one (201), and the other end of the fuse (2) is fuse tip two (202). The fuse tip one (201) and fuse tip two (202) are processed into a flatter structural shape while ensuring that the cross-sectional area of ​​the fuse tip one (201) and the cross-sectional area of ​​the middle structure of the fuse (2) remain unchanged.

7. The high-voltage fuse according to claim 1, characterized in that: The inner walls of the fuse end cap one (1) and fuse end cap two (5) are machined with slots corresponding to the bosses on the inner walls of the outer shell (6). The fuse end cap one (1), fuse end cap two (5) and the outer shell (6) are connected to the bosses through the slots.

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