Fuse housing and fuse

Abstract

The application discloses a fuse shell and a fuse, and relates to the technical field of fuses, wherein the fuse shell comprises a shell body, at least one first partition and at least one second partition, the shell body is formed with an arc-extinguishing cavity and a buffer cavity distributed along a first direction; the first partition and the second partition are distributed along the first direction, the at least one first partition is arranged between the arc-extinguishing cavity and the buffer cavity, and the at least one second partition is arranged in the buffer cavity; wherein the first partition is provided with a first air vent, the second partition is provided with a second air vent, and the first air vent and the second air vent are arranged in a staggered mode along the first direction. The technical scheme of the application sets the first partition between the arc-extinguishing cavity and the buffer cavity, at least sets the second partition in the buffer cavity, and arranges the first air vent on the first partition and the second air vent on the second partition in a staggered mode, so that the breaking capacity of the fuse is improved, and the breaking effect of zero flying arc is facilitated to be realized.

Description

Technical Field

[0001] This application relates to the field of fuse technology, and in particular to a fuse housing and a fuse. Background Technology

[0002] A fuse is a protective device that can integrate internal signal triggering and external control signal triggering. During the breaking process, existing fuses may fail to extinguish the arc in time or cause reignition due to excessive pressure in the arc-extinguishing chamber, ultimately resulting in breaking failure. Utility Model Content

[0003] The main objective of this application is to provide a fuse housing and a fuse designed to improve the breaking capacity of the fuse.

[0004] To achieve the above objectives, the fuse housing proposed in this application includes:

[0005] The shell body has arc-extinguishing cavities and buffer cavities distributed along a first direction; and,

[0006] At least one first partition and at least one second partition are provided, the first partition and the second partition are distributed at intervals along the first direction, at least one first partition is provided between the arc extinguishing cavity and the buffer cavity, and at least one second partition is provided in the buffer cavity;

[0007] The first partition is provided with a first vent, and the second partition is provided with a second vent. The first vent and the second vent are staggered along the first direction.

[0008] In one embodiment, the first vent is located in the middle of the first partition, and the second vent is located at the edge of the second partition.

[0009] In one embodiment, the edge of the second partition is provided with at least two connecting protrusions, which are connected to the shell body, and the interval between two adjacent connecting protrusions forms the second vent.

[0010] In one embodiment, the buffer cavity is further provided with at least one of the first partitions, and the first partition and the second partition are alternately arranged.

[0011] In one embodiment, the surfaces of the first partition and the second partition facing the arc-extinguishing cavity are tapered in the direction away from the arc-extinguishing cavity.

[0012] In one embodiment, the first partition and the second partition are conical or arc-shaped.

[0013] In one embodiment, the side of the buffer cavity opposite to the arc-extinguishing cavity is configured as an open structure.

[0014] In one embodiment, the shell body is provided with a slot, the slot being located between the arc-extinguishing cavity and the buffer cavity, and the first partition portion engaging with the slot.

[0015] In one embodiment, the shell body includes a first shell portion and a second shell portion distributed along the first direction. The second shell portion forms the buffer cavity, and the inner peripheral wall of the buffer cavity has a stepped surface. The first shell portion forms the arc-extinguishing cavity and has a protrusion facing the stepped surface. The slot is formed between the protrusion and the stepped surface.

[0016] In one embodiment, the second partition portion is integrally formed with the second shell portion.

[0017] This application also proposes a fuse, including the aforementioned fuse housing, the housing body further having a socket communicating with the arc-extinguishing cavity, the fuse further including a conductive element and a piston installed on the housing body, the conductive element covering the socket, and the piston corresponding to the socket being located on the side of the conductive element away from the arc-extinguishing cavity.

[0018] The technical solution of this application establishes a first partition between the arc-extinguishing chamber and the buffer chamber, creating a significant pressure difference between them during the fuse's breaking process. This allows the high-pressure airflow in the arc-extinguishing chamber to be rapidly discharged into the buffer chamber through the first vent on the first partition. Furthermore, the electric arc can fully contact the arc-extinguishing medium within the arc-extinguishing chamber during this process, accelerating arc extinguishing and improving the fuse's breaking performance, thus reducing the risk of fuse failure. Simultaneously, by staggering the first vent on the first partition with the second vent on the second partition along a first direction, the airflow path is increased. This allows impurities such as metal particles and carbides, along with the electric arc, to be fully adsorbed and cooled during the movement path, thereby improving arc-extinguishing efficiency and facilitating zero-flashover breaking. Additionally, it prevents excessive pressure within the arc-extinguishing chamber from causing airflow backflow or fuse housing rupture, thereby reducing production costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 An exploded view of an embodiment of the fuse provided in this application;

[0021] Figure 2 for Figure 1 A cross-sectional view of the fuse before it breaks;

[0022] Figure 3 for Figure 1 A cross-sectional view of the fuse after it has broken;

[0023] Figure 4 A cross-sectional view of another embodiment of the fuse provided in this application after it has broken;

[0024] Figure 5 for Figure 1 A schematic diagram of the structure of the second shell portion and the second partition portion;

[0025] Figure 6 for Figure 5 Top view in the middle;

[0026] Figure 7 for Figure 1 A schematic diagram of the structure of the first partition section;

[0027] Figure 8 for Figure 1 A schematic diagram of the structure of the first shell section;

[0028] Figure 9 for Figure 1 A schematic diagram of the fit between the first and second shell parts.

[0029] Explanation of icon numbers:

[0030] 100. Shell body; 110. Arc extinguishing chamber; 120. Buffer chamber; 130. Insertion port; 140. Slot; 150. First shell portion; 151. Protrusion; 160. Second shell portion; 161. Stepped surface; 200. First partition portion; 210. First vent; 300. Second partition portion; 310. Second vent; 320. Connecting protrusion; 400. Arc extinguishing medium; 500. Conductive component; 600. Piston.

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0035] This application proposes a fuse housing.

[0036] Please see Figures 1 to 3 In one embodiment of this application, the fuse housing includes a housing body 100, at least one first partition 200, and at least one second partition 300. The housing body 100 forms an arc-extinguishing cavity 110 and a buffer cavity 120 distributed along a first direction. The first partition 200 and the second partition 300 are spaced apart along the first direction. At least one first partition 200 is disposed between the arc-extinguishing cavity 110 and the buffer cavity 120, and at least one second partition 300 is disposed in the buffer cavity 120. The first partition 200 is provided with a first vent 210, and the second partition 300 is provided with a second vent 310. The first vent 210 and the second vent 310 are staggered along the first direction.

[0037] Specifically, the fuse housing is used in the fuse. The housing body 100 has an arc-extinguishing cavity 110 and a buffer cavity 120 distributed along a first direction. The arc-extinguishing cavity 110 contains an arc-extinguishing medium 400. For example, the arc-extinguishing medium 400 can be a metal wire mesh, a metal grid sheet, quartz sand, etc., which is not limited in this application. The buffer cavity 120 is connected to the external environment of the housing body 100. The arc-extinguishing cavity 110 and the buffer cavity 120 are separated by a first partition 200 and connected by a first vent 210 on the first partition 200. The housing body 100 also has a socket 130 that communicates with the arc-extinguishing cavity 110. The fuse also includes a conductive element 500 and a piston 600 installed on the fuse housing. The conductive element 500 covers the socket 130, and the piston 600 is located on the side of the conductive element 500 away from the arc-extinguishing cavity 110, corresponding to the socket 130. When the ignition tube of the fuse is triggered, the piston 600 moves rapidly toward the arc-extinguishing chamber 110 until it cuts off the conductive component 500, generating an electric arc and impurities such as metal particles and carbides. The electric arc causes a sudden increase in temperature and pressure inside the arc-extinguishing chamber 110.

[0038] The first partition 200 is located between the arc-extinguishing chamber 110 and the buffer chamber 120, creating a significant pressure difference between them during the breaking process. This allows the high-pressure airflow in the arc-extinguishing chamber 110 to be discharged into the buffer chamber 120 through the first vent 210 on the first partition 200. During this process, the electric arc moves rapidly into the arc-extinguishing chamber 110 and comes into full contact with the arc-extinguishing medium 400 to cut and cool the arc, thereby improving the breaking effect. Furthermore, the arc is less likely to be ejected in reverse towards the socket 130, thus avoiding risks such as damage to the piston 600 and impact on the arc's stroke.

[0039] The electric arc, metal particles, and high-pressure gas flow can sequentially move along the path of the socket 130, the arc-extinguishing chamber 110 (where the arc is in full contact with the arc-extinguishing medium 400), the first vent 210 on the first partition 200, the buffer chamber 120, the second vent 310 on the second partition 300, and the external environment. This accelerates the movement of the electric arc and ensures full contact between the arc and the arc-extinguishing medium 400, allowing the arc to be quickly broken, absorbed, and cooled. This improves the fuse's breaking effect, increases its breaking capacity, and reduces the risk of fuse failure. Simultaneously, most of the metal particles and carbides brought by the arc are adsorbed by the arc-extinguishing medium 400, with a small portion adsorbed in the buffer chamber 120. This not only improves arc-extinguishing efficiency but also effectively reduces the risk of metal particles flying out. Furthermore, the buffer chamber 120 receives the high-temperature, high-pressure gas discharged from the arc-extinguishing chamber 110, acting as a buffer to prevent the fuse housing from rupturing due to a sudden increase in pressure. There is no need to insert steel plates into the fuse housing to ensure strength, thus reducing material and processing costs.

[0040] By staggering the first vent 210 and the second vent 310 along the first direction, the distance between the first vent 210 and the second vent 310 on adjacent partitions is increased, thus providing a longer path for the high-pressure gas flow. This allows impurities such as high-pressure gas, metal particles, and carbides generated by the electric arc to flow along this path. The metal particles and carbides, along with the electric arc, can be fully adsorbed and cooled during the movement path, improving arc extinguishing efficiency and effectively reducing the risk of metal particles flying out. This significantly shortens the arc-extinguishing distance, facilitating zero-fly-out arc breaking. Simultaneously, the high-temperature, high-pressure gas in the arc-extinguishing chamber 110 first impacts the first partition 200 located between the arc-extinguishing chamber 110 and the buffer chamber 120, and then enters the buffer chamber 120 through the first vent 210. Due to the pressure difference between the arc-extinguishing chamber 110 and the buffer chamber 120, the pressure of the high-pressure gas decreases after flowing into the buffer chamber 120. The first vent 210 on the first partition 200 and the second vent 310 on the adjacent second partition 300 are designed to be staggered, allowing the gas to flow along a designed path. During this process, the gas continuously collides and rubs against the inner walls of the partitions and buffer chamber 120, further consuming energy and reducing pressure and temperature. After a series of buffering and energy dissipation processes, the gas is safely guided to the external environment, preventing harm to equipment and personnel.

[0041] The first direction can be consistent with the direction of movement of the piston 600, or it can form an angle with the direction of movement of the piston 600. That is, the second vent 310 on the second partition 300 can be located on the side opposite to the inlet 130, or it can be located on the side adjacent to the inlet 130.

[0042] The technical solution of this application, by setting a first partition 200 between the arc-extinguishing chamber 110 and the buffer chamber 120, creates a large pressure difference between the arc-extinguishing chamber 110 and the buffer chamber 120 during the fuse breaking process. This allows the high-pressure airflow in the arc-extinguishing chamber 110 to be quickly discharged into the buffer chamber 120 through the first vent 210 on the first partition 200. Furthermore, the electric arc can fully contact the arc-extinguishing medium 400 in the arc-extinguishing chamber 110 during this process, thereby accelerating arc extinguishing, improving the fuse's breaking effect, increasing its breaking capacity, and reducing the risk of fuse breaking failure. Simultaneously, by offsetting the first vent 210 on the first partition 200 and the second vent 310 on the second partition 300 along a first direction, the airflow path is increased. This allows impurities such as metal particles and carbides, as well as the electric arc, to be fully adsorbed and cooled during the movement path, thereby improving arc-extinguishing efficiency and facilitating a zero-flashover breaking effect. In addition, it can prevent excessive air pressure in the arc-extinguishing chamber 110 from causing airflow backflow or fuse housing rupture, thereby reducing production costs.

[0043] In one implementation, please refer to Figures 5 to 7 The first vent 210 is located in the middle of the first partition 200, and the second vent 310 is located at the edge of the second partition 300.

[0044] By placing the first vent 210 in the middle of the first partition 200 and the second vent 310 at the edge of the second partition 300, a staggered arrangement of the first vent 210 and the second vent 310 is achieved. The high-pressure gas in the arc-extinguishing chamber 110 first converges towards the center, flows into the buffer chamber 120 from the first vent 210, and then diffuses outwards, flowing out from the second vent 310 after traveling a relatively long path. This staggered arrangement of "entering in the center and exiting at the edge" creates an asymmetrical flow of gas within the buffer chamber 120, increasing the contact area with the shell wall and improving cooling efficiency and the stability of pressure release. Furthermore, the first vent 210 is located in the center of the first partition 200, allowing for smoother airflow. The second vent 310 is located at the edge of the second partition 300, causing the gas to flow towards the inner wall of the buffer chamber 120, creating a flow deviation effect. This helps to extend the path length while enhancing energy dissipation. As a result, impurities such as metal particles and carbides in the airflow, as well as electric arcs, can be fully adsorbed and cooled in the movement path, thereby improving arc extinguishing efficiency and facilitating the achievement of zero-flying arc breaking.

[0045] In other embodiments, the first vent 210 may be located near the edge of the first partition 200, and the second partition 300 adjacent to the first partition 200 may be provided with a second vent 310 located near the middle of the second partition 300, adopting a staggered arrangement of "edge in, middle out".

[0046] In one implementation, please refer to Figure 5 and Figure 6 The edge of the second partition 300 is provided with at least two connecting protrusions 320, which are connected to the shell body 100. The gap between two adjacent connecting protrusions 320 forms a second vent 310.

[0047] A connecting protrusion 320 is located at the edge of the second partition 300 and is connected to the shell body 100. This enhances the overall rigidity and stability of the partition, prevents structural damage due to excessive internal pressure, and increases the stability of the connection between the second partition 300 and the shell body 100. The second vent 310 is formed by the interval between two adjacent connecting protrusions 320, eliminating the need for additional hole-like structures, thus simplifying the processing procedure and reducing processing costs.

[0048] In other embodiments, the first partition 200 may also adopt the same design, such that the first vent 210 is located close to the edge of the first partition 200.

[0049] In one implementation, please refer to Figure 4 The buffer cavity 120 is also provided with at least one first partition 200, and the first partition 200 and the second partition 300 are alternately arranged.

[0050] At least two first partition sections 200 are provided, one of which is located between the arc-extinguishing chamber 110 and the buffer chamber 120, while the other first partition sections 200 are located within the buffer chamber. By alternating the first partition sections 200 and the second partition sections 300 along the first direction, the gas needs to change its flow direction when passing through each layer of the first partition section 200 and the second partition section 300. Furthermore, due to the different positions of adjacent first vents 210 and second vents 310, the gas needs to travel along different paths, thereby extending the length of the gas flow path within a limited space, which is beneficial for further achieving the zero-flashover interruption effect.

[0051] Understandably, the high-pressure gas in the arc-extinguishing chamber 110 first enters the buffer chamber 120 through the first vent 210 located in the middle of the first partition 200, then flows from the second vent 310 located at the edge of the first second partition 300 it encounters to the adjacent second partition 300, and then flows from the first vent 210 located in the middle of the second first partition 200 it encounters, and so on. As the gas passes through each alternately arranged first partition 200 and second partition 300 in sequence, its flow path direction changes continuously, lengthening the gas flow path, increasing the chance of contact with the shell wall, promoting heat exchange and pressure release, and also improving the adsorption and cooling capacity for impurities such as metal particles and carbides in the gas flow and electric arcs, thereby improving the arc-extinguishing efficiency and facilitating the further realization of zero-flashover interruption.

[0052] It is possible to have only one first partition 200 and one second partition 300, wherein the first partition 200 is located between the arc-extinguishing cavity 110 and the buffer cavity 120, and the second partition 300 is located in the buffer cavity 120. Alternatively, at least two first partitions 200 and two partitions 300 may be provided, and the first partitions 200 and the second partitions 300 may be alternately arranged in a first direction, wherein one first partition 200 is located between the arc-extinguishing cavity 110 and the buffer cavity 120, and the second partitions 300 and the remaining first partitions 200 are located within the buffer cavity 120.

[0053] In one implementation, please refer to Figure 2 , Figure 5 and Figure 7The surfaces of the first partition 200 and the second partition 300 facing the arc-extinguishing cavity 110 are tapered in the direction away from the arc-extinguishing cavity 110.

[0054] The surfaces of the first partition 200 and the second partition 300 facing the arc-extinguishing chamber 110 are designed to taper away from the arc-extinguishing chamber 110. This design guides the gas flow, ensuring it follows a specific path rather than spreading randomly. The tapering surfaces of the first partition 200 and the second partition 300 create a Venturi-like effect during gas flow, where the gas accelerates and decreases in pressure as it passes through a narrow area. Understandably, compared to the edge region of the first partition 200, the first vent 210 is lower and has a smaller space. The gas within the arc-extinguishing chamber 110 converges from all sides towards the lower, smaller first vent 210, causing the gas to accelerate and decrease in pressure as it passes through the first vent 210. This facilitates the rapid discharge of high-pressure gas, improving arc-extinguishing efficiency and the fuse's breaking capacity. Compared to the design where the surfaces of the first partition 200 and the second partition 300 facing the arc-extinguishing cavity 110 are planar, the tapered surface in this embodiment further extends the airflow path, improves the adsorption effect of metal particles, and reduces the airflow obstruction, making the airflow smoother.

[0055] In other embodiments, the surfaces of the first partition 200 and the second partition 300 facing the arc-extinguishing cavity 110 may also be planar.

[0056] In one implementation, please refer to Figure 2 , Figure 5 and Figure 7 The first partition 200 and the second partition 300 are conical or arc-shaped.

[0057] The first partition 200 and the second partition 300 are conical or arc-shaped. Specifically, the surfaces of the first partition 200 and the second partition 300 facing the arc-extinguishing cavity 110 and the surfaces facing away from the arc-extinguishing cavity 110 both taper away from the arc-extinguishing cavity 110. This makes the wall thickness of the first partition 200 and the second partition 300 consistent from the middle to the edge, thereby reducing the wall thickness of the edge regions of the first partition 200 and the second partition 300, saving material usage, and reducing the weight of the first partition 200 and the second partition 300. The conical design of the first partition 200 and the second partition 300 increases the gas flow rate, promotes rapid gas discharge, and improves arc-extinguishing efficiency and the breaking capacity of the fuse. The arc-shaped design of the first partition 200 and the second partition 300 provides a smooth flow path, reduces turbulence, increases the contact area between the gas and the shell wall, and enhances the cooling effect.

[0058] In one implementation, please refer to Figure 2 and Figure 3 The side of the buffer chamber 120 away from the arc-extinguishing chamber 110 is set as an open structure.

[0059] By setting the side of the buffer chamber 120 away from the arc-extinguishing chamber 110 as an open structure, the buffer chamber 120 can be connected to the external environment of the shell body 100, so that the gas flowing out from the second vent 310 can be smoothly discharged into the external environment through the open structure. The shell body 100 with the open structure is simple in structure and easy to manufacture.

[0060] Furthermore, the second partition 300 can be housed inside the buffer cavity 120 or covered by an open structure.

[0061] In other embodiments, the buffer cavity 120 may also have a cavity wall on the side opposite to the arc extinguishing cavity 110, and the cavity wall is provided with multiple through holes, through which the buffer cavity 120 is connected to the external environment of the shell body 100.

[0062] In one implementation, please refer to Figure 2 and Figure 9 The shell body 100 is provided with a slot 140, which is located between the arc extinguishing cavity 110 and the buffer cavity 120. The first partition 200 is engaged with the slot 140.

[0063] The design of the slot 140 ensures that the first partition 200 can be accurately installed in the predetermined position, guaranteeing a clear boundary between the arc-extinguishing chamber 110 and the buffer chamber 120, and avoiding performance degradation due to assembly errors. The first partition 200 achieves a stable connection with the shell body 100 through the snap-fit ​​engagement with the slot 140, eliminating the need for additional fasteners (such as screws, rivets, etc.), simplifying the assembly process, and improving production efficiency.

[0064] In other embodiments, the shell body 100 may be provided with a locking protrusion located between the arc extinguishing cavity 110 and the buffer cavity 120, and the first partition 200 may be provided with a groove, in which the locking protrusion is engaged.

[0065] In one implementation, please refer to Figure 2 , Figure 5 , Figure 8 and Figure 9 The shell body 100 includes a first shell portion 150 and a second shell portion 160 distributed along a first direction. The second shell portion 160 forms a buffer cavity 120. The inner peripheral wall of the buffer cavity 120 has a stepped surface 161. The first shell portion 150 forms an arc-extinguishing cavity 110 and has a protrusion 151 facing the stepped surface 161. A slot 140 is formed between the protrusion 151 and the stepped surface 161.

[0066] The gap between the protrusion 151 of the first housing 150 and the stepped surface 161 of the second housing 160 forms a groove 140, providing a precise and stable mounting position for the first partition 200. This ensures that the first partition 200 is stably installed in the correct position, preventing displacement of the fuse due to high-pressure airflow or other external forces during disconnection. The first housing 150 and the second housing 160 are connected by splicing, and the groove 140 is automatically formed after splicing. This simplifies the processing of the groove 140, reduces the assembly difficulty of the first partition 200 and the groove 140, and allows installation to be completed without additional fasteners, reducing manufacturing costs and improving assembly efficiency.

[0067] In other embodiments, the first shell portion 150 and the second shell portion 160 are integrally formed, and a groove 140 is recessed at the connection between the arc extinguishing cavity 110 and the buffer cavity 120. Alternatively, the first shell portion 150 and the second shell portion 160 are distributed along a direction perpendicular to the first direction, and the groove 140 is partially formed in the first shell portion 150 and partially formed in the second shell portion 160.

[0068] In one implementation, please refer to Figure 5 and Figure 6 The second partition 300 and the second shell 160 are integrally formed.

[0069] The integral molding design of the second partition 300 and the second shell 160 avoids seams or connection points that may occur in traditional assembly methods, thereby improving the integrity and robustness of the entire structure. Compared to the traditional method that requires multiple steps to assemble different parts, integral molding simplifies the production process, reduces assembly time, helps improve production efficiency and output, and reduces production costs. It is worth mentioning that, in order to reduce the processing difficulty of integral molding the second partition 300 and the second shell 160, even if there are multiple second partitions 300, only one second partition 300 is integrally molded with the second shell 160, while the remaining second partitions 300 are separately molded and then connected together with the second shell 160.

[0070] In other embodiments, the second partition 300 and the second shell 160 can also be connected by snap-fitting, welding or other means.

[0071] In one embodiment, the first partition 200 and / or the second partition 300 are made of a magnetically conductive material.

[0072] The first partition 200 and / or the second partition 300 can be made of magnetically conductive materials such as iron, silicon steel sheets, or permalloy, so that the first partition 200 and / or the second partition 300 have good magnetic conductivity, can guide the magnetic field distribution, control the arc movement path, prevent the arc from directly impacting the shell wall of the shell body 100, and improve arc extinguishing efficiency and safety; at the same time, it improves the partition's ability to adsorb arcs and metal particles.

[0073] In another embodiment, the first partition 200 and / or the second partition 300 are made of thermoplastic material.

[0074] The first partition 200 and / or the second partition 300 can be made of thermoplastic materials such as polycarbonate, polyamide, and polypropylene, so that the first partition 200 and / or the second partition 300 have good insulation and a certain high temperature resistance, making the partition easy to form and improving production efficiency.

[0075] In another embodiment, the first partition 200 and / or the second partition 300 are made of thermosetting materials.

[0076] The first partition 200 and / or the second partition 300 can be made of thermosetting materials such as epoxy resin, phenolic resin, and unsaturated polyester. As a result, the first partition 200 and / or the second partition 300 cannot be remelted after curing and have excellent high temperature resistance and chemical stability. They are not easily deformed or aged after long-term use and can be used in electrical equipment with high requirements for heat resistance and arc resistance.

[0077] The first partition 200 and the second partition 300 can be made of the same material or different materials.

[0078] This application also proposes a fuse, which includes a fuse housing and a conductive element 500 and a piston 600 installed on the housing body 100. The specific structure of the fuse housing is as described in the above embodiments. Since this fuse adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0079] The shell body 100 is also provided with an insertion port 130 that communicates with the arc extinguishing cavity 110. The conductive element 500 is covered by the insertion port 130, and the piston 600 is located on the side of the conductive element 500 away from the arc extinguishing cavity 110, corresponding to the insertion port 130.

[0080] Please see Figures 1 to 3The fuse housing provides physical support and protection for the overall structure, and its internal design includes an arc-extinguishing chamber 110 and a buffer chamber 120. A conductive element 500 is installed inside the fuse housing and covers the socket 130. The conductive element 500 is used for external circuit connection, ensuring that external current can pass smoothly through the fuse. A piston 600 is located on the side of the conductive element 500 opposite to the arc-extinguishing chamber 110, i.e., close to the socket 130 but on the opposite side of the conductive element 500. The function of the piston 600 is to quickly actuate upon detecting abnormal current, cutting off the circuit and preventing further damage.

[0081] Under normal operating conditions, current flows through the conductive element 500 into the fuse and through the internal fuse wire or other sensitive elements. At this time, the piston 600 remains stationary, not interfering with the normal flow of current. When an overload or short circuit occurs, the signal fuse melts and triggers, or an external excitation monitoring circuit triggers the ignition device to provide power to the piston 600. The piston 600 rapidly moves towards the arc-extinguishing chamber 110 until it cuts off the conductive element 500, achieving arc breaking. The arc enters the arc-extinguishing chamber 110 under the action of the piston 600 and the air pressure. Under the large pressure difference between the arc-extinguishing chamber 110 and the buffer chamber 120, the high-pressure airflow in the arc-extinguishing chamber 110 can be quickly discharged to the buffer chamber 120 through the vent on the first partition 200, and then discharged from the buffer chamber 120 through the vent on the second partition 300. During this process, the arc can fully contact the arc-extinguishing medium 400 in the arc-extinguishing chamber 110, thereby accelerating arc extinguishing, improving the fuse breaking effect, and reducing the risk of fuse breaking failure.

[0082] The above description is merely an exemplary embodiment of this application and does not limit the scope of protection of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A fuse housing, characterized in that, include: The shell body (100) has an arc-extinguishing cavity (110) and a buffer cavity (120) distributed along a first direction; as well as, At least one first partition (200) and at least one second partition (300) are provided, the first partition (200) and the second partition (300) are spaced apart along the first direction, at least one first partition (200) is provided between the arc extinguishing cavity (110) and the buffer cavity (120), and at least one second partition (300) is provided in the buffer cavity (120); The first partition (200) is provided with a first vent (210), and the second partition (300) is provided with a second vent (310). Along the first direction, the first vent (210) and the second vent (310) are staggered.

2. The fuse housing as described in claim 1, characterized in that, The first vent (210) is located in the middle of the first partition (200), and the second vent (310) is located at the edge of the second partition (300).

3. The fuse housing as described in claim 2, characterized in that, The second partition (300) has at least two connecting protrusions (320) spaced apart on its edge. The connecting protrusions (320) are connected to the shell body (100), and the interval between two adjacent connecting protrusions (320) forms the second vent (310).

4. The fuse housing as described in claim 1, characterized in that, The buffer cavity (120) is also provided with at least one of the first partitions (200), and the first partition (200) and the second partition (300) are alternately arranged.

5. The fuse housing as described in claim 1, characterized in that, The surfaces of the first partition (200) and the second partition (300) facing the arc-extinguishing cavity (110) taper in a direction away from the arc-extinguishing cavity (110).

6. The fuse housing as described in claim 5, characterized in that, The first partition (200) and the second partition (300) are conical or arc-shaped.

7. The fuse housing as claimed in claim 1, characterized in that, The buffer chamber (120) is configured with an open structure on the side opposite to the arc-extinguishing chamber (110).

8. The fuse housing as claimed in claim 1, characterized in that, The shell body (100) is provided with a slot (140), which is located between the arc extinguishing cavity (110) and the buffer cavity (120), and the first partition (200) is engaged with the slot (140).

9. The fuse housing as claimed in claim 8, characterized in that, The shell body (100) includes a first shell portion (150) and a second shell portion (160) distributed along the first direction. The second shell portion (160) forms the buffer cavity (120). The inner peripheral wall of the buffer cavity (120) has a stepped surface (161). The first shell portion (150) forms the arc-extinguishing cavity (110) and has a protrusion (151) facing the stepped surface (161). The slot (140) is formed between the protrusion (151) and the stepped surface (161).

10. The fuse housing as claimed in claim 9, characterized in that, The second partition (300) and the second shell (160) are integrally formed.

11. A fuse, characterized in that, The fuse includes a fuse housing as described in any one of claims 1 to 10, wherein the housing body (100) is further provided with a socket (130) communicating with the arc-extinguishing cavity (110), and the fuse further includes a conductive element (500) and a piston (600) installed on the housing body (100), wherein the conductive element (500) covers the socket (130), and the piston (600) is disposed on the side of the conductive element (500) opposite to the arc-extinguishing cavity (110) corresponding to the socket (130).

Images