Tubular energized fuse

Abstract

The application provides a tubular excitation fuse, comprising a first shell, a second shell, a third shell, an excitation source, a first moving mechanism and a conductor; the second shell and the third shell are arranged in the first shell; the second shell is provided with a first cavity, the third shell is provided with a second cavity, the second shell and the third shell are combined to form an inner shell, and the first cavity and the second cavity are combined to form a first inner cavity; the first end of the first shell is provided with a first terminal, and the second end of the first shell is provided with a second terminal; one end of the conductor is connected to the first terminal, the conductor passes through the inner shell and the second end is connected to the second terminal; the excitation source is arranged at the first end of the second shell and is used for releasing high-pressure gas into the first cavity when triggered; the first moving mechanism is arranged in the first cavity, and the conductor is arranged in the impact direction of the first moving mechanism. In this way, the short board of the traditional protection device in the complex working condition is solved.

Description

Technical Field

[0001] This application belongs to the field of emergency protection device technology, specifically relating to a tubular excitation fuse. Background Technology

[0002] Currently, traditional photovoltaic (PV) fuses need to adapt to the unique operating conditions of PV systems, such as high DC voltage, large current fluctuations, and long-term outdoor operation. In PV systems, existing fuses face two major technological bottlenecks, making it difficult to meet the industry's development needs. First, the DC side of a PV system consists of multiple PV panels connected in parallel, resulting in extremely low fault current multiples, such as a minimum fault current of only 1.5 times the rated value. The design principle of fuses dictates that they cannot simultaneously meet the contradictory requirements of "long-term stable operation under rated current and rapid melting under 1.5 times overload current," easily leading to problems such as failure to trip under low overload or malfunction under normal current, seriously affecting system safety and power generation efficiency. Second, as PV systems upgrade to 1500V high voltage levels, the protection range expands significantly. Fuses need to cover a full range of protection scenarios, from small overload multiples to large short circuits of tens of times the rated current. The technology and arc-extinguishing capabilities of traditional fuses are insufficient to meet the wide-range protection requirements, becoming a key bottleneck restricting the performance improvement of PV protection systems. Summary of the Invention

[0003] This application provides a tubular excitation fuse, which aims to enable conventional fuses to have the function of excitation fuses, thereby improving the safety and reliability of conventional fuses.

[0004] This application provides a tubular excitation fuse, including a first housing, a second housing, a third housing, an excitation source, a first motion mechanism, and a conductor; the second housing and the third housing are disposed within the first housing; The second housing has a first cavity, and the third housing has a second cavity. The second housing and the third housing are combined to form an inner housing, and the first cavity and the second cavity are combined to form a first inner cavity. The first end of the first housing is provided with a first terminal, and the second end of the first housing is provided with a second terminal; One end of the conductor is connected to the first terminal, and the conductor passes through the inner housing and its second end is connected to the second terminal. The excitation source is located at the first end of the second housing and is used to release high-pressure gas into the first cavity when triggered. The first motion mechanism is disposed in the first cavity, and the conductor is disposed in the first impact direction of the first motion mechanism.

[0005] In one possible embodiment, a third cavity is provided at the first end of the second housing, and the excitation source is disposed in a receiving hole between the first cavity and the third cavity, the receiving hole communicating with both the first cavity and the third cavity; a sealing layer is provided in the third cavity, the sealing layer being used to seal the receiving hole and fix the excitation source; a first opening is provided at one end of the third cavity near the first terminal, or a first opening is provided at one end of the third cavity near the side wall of the first housing; a first insulating layer is provided on the first opening, the first insulating layer being fixed to the first terminal when the first opening faces the first terminal, and fixed to the side wall of the first housing when the first opening faces the side wall of the first housing; a first arc-quenching layer is filled between the first insulating layer and the sealing layer; a circuit board is provided between the receiving hole and the sealing layer, and the excitation source is connected to the circuit board to receive external excitation signals through the circuit board.

[0006] In one possible embodiment, the angle between the first impact direction and the cross-section of the first housing is 0°-180°.

[0007] In one possible embodiment, the conductor includes a first wiring portion, a functional portion, and a second wiring portion, wherein the included angle between the functional portion and the first and second wiring portions is 0°-90°.

[0008] In one possible embodiment, an extension extends from the bottom of the third housing to contact the functional part to form an extension; the extension divides the second cavity into a first sub-chamber and a second sub-chamber; a second opening of the first sub-chamber and a third opening of the second sub-chamber are correspondingly disposed with at least one disconnected weak point on the conductor; the disconnected weak point is disposed in the first impact direction of the first motion mechanism.

[0009] In one possible embodiment, a limiting groove is provided on the second housing and / or the third housing, and the portion of the conductor passing through the inner housing is accommodated in the limiting groove.

[0010] In one possible embodiment, an arc-extinguishing fuse is also provided, with a first end of the arc-extinguishing fuse connected to the first terminal or the first end of the conductor, and a second end of the arc-extinguishing fuse connected to the second terminal or the second end of the conductor.

[0011] In one possible embodiment, at least one first fixing part is provided on the outer wall of the third housing; the arc-extinguishing melt includes a first extension part, and the first end of the arc-extinguishing melt, the first extension part and the second end of the arc-extinguishing melt are connected in sequence; the first extension part is arranged around the outer wall of the third housing and is fixed to the outer wall of the third housing by the first fixing part.

[0012] In one possible embodiment, the first extension is further provided with at least one first connecting portion, which engages with the at least one first fixing portion to fix the first extension to the outer wall of the third housing.

[0013] In one possible embodiment, the first fixing part is a protruding structure or a concave structure, and the first connecting part is a concave structure or a protruding structure.

[0014] In one possible embodiment, the first fixing part is a magnetic component, and the arc-extinguishing melt is a metal component; the first fixing part and the arc-extinguishing melt are fixed by magnetic attraction.

[0015] In one possible embodiment, a second motion mechanism is further included, wherein at least one through-hole is provided on the side wall of the third housing, and the arc-extinguishing melt, when disposed on the outer wall of the third housing, covers the fourth opening of the through-hole; the second motion mechanism includes an easily separable detachable portion, extending from the detachable portion to form at least one first end, the at least one first end respectively penetrating into the at least one through-hole, and the detachable portion being disposed in the first impact direction; or, The third housing has at least one recess on its side wall, and the arc-extinguishing melt covers the fifth opening of the recess when it is disposed on the outer wall of the third housing; the second motion mechanism includes at least one first end; the at least one first end is accommodated in the at least one recess, and the at least one first end is disposed in the first impact direction.

[0016] In one possible embodiment, a third motion mechanism is also included, which is disposed on the disconnection portion. The first end of the third motion mechanism is provided with a cutting structure. When the first motion mechanism impacts the disconnection portion, the disconnection portion is broken by impacting the third motion mechanism, and the first end is pushed through the through portion and out of the third housing to break the arc-extinguishing melt.

[0017] In one possible embodiment, at least one fourth housing is further included, wherein the arc-extinguishing melt, when disposed on the outer wall of the third housing, covers the fourth opening of the through portion or the fifth opening of the aforementioned recess; the at least one fourth housing is respectively disposed on the outer wall of the second housing to cover the through portion, thereby fixing the arc-extinguishing melt covering the through portion; the fourth housing includes a fourth cavity, wherein the first end extends from the through portion into the fourth cavity; or, the at least one fourth housing is respectively disposed on the outer wall of the second housing to cover the recess; the fourth housing includes a fourth cavity, wherein the first end of the second motion mechanism extends from the recess into the fourth cavity.

[0018] In one possible embodiment, the arc-extinguishing melt is further provided with at least one second extension connected between the first extension and the second end of the arc-extinguishing melt, and the at least one second extension forms a plurality of second bends in the first housing.

[0019] In one possible embodiment, at least one fourth housing is also included, which extends toward the second terminal to form at least one third extension. The arc-extinguishing melt includes at least one fourth extension connected between the first extension and the second end of the arc-extinguishing melt, and the at least one fourth extension is disposed on the outer wall of the third extension.

[0020] In one possible embodiment, the outer wall of the third extension is provided with at least one first limiting portion, which is used to isolate the fourth extension from the body of the third extension.

[0021] In one possible embodiment, a first connector is further included, on which a second connector is provided; a second fixing part is provided at the second end of the third extension near the second terminal; the first connector is engaged with the second fixing part through the second connector to clamp and fix the corresponding third extension to the second end.

[0022] In one possible embodiment, when the fourth extension is disposed on the third extension, a second insulating layer is provided between the third extension and the fourth extension for isolation.

[0023] In one possible embodiment, the first terminal includes a first sub-cover plate, one end of the second terminal includes a second sub-cover plate, and the first sub-cover plate and the second sub-cover plate are respectively disposed at the two ends of the first housing to cover the two ends of the first housing; the two ends of the conductor are respectively connected to the first sub-cover plate and the second sub-cover plate; a third wiring portion extends from the first sub-cover plate, and the first terminal is connected to the main circuit through the third wiring portion; a fourth wiring portion extends from the second sub-cover plate, and the second terminal is connected to the main circuit through the fourth wiring portion.

[0024] As can be seen, this application combines an excitation fuse with a traditional fuse to form a new fuse structure. By setting the excitation source and motion mechanism inside the housing of a traditional tubular fuse, the excitation source can receive external trigger signals to quickly cut off the circuit, thus realizing the function of an excitation fuse while maintaining the universal size and structure of a traditional fuse. This allows for direct replacement with traditional fuses in existing applications, effectively solving the protection shortcomings of traditional protection devices under complex operating conditions. It can curb safety hazards such as battery thermal runaway and PCS failure, meet industry standard compliance requirements, reduce the total life cycle cost of the system, and improve economic efficiency. Attached Figure Description

[0025] 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 these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the first type of tubular excitation fuse provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the first type of tubular excitation fuse provided in this application after it has been triggered; Figure 3 This is a schematic diagram of the structure of the second type of tubular excitation fuse provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the second type of tubular excitation fuse after being triggered, as provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the third type of tubular excitation fuse provided in the embodiments of this application; Figure 6 This is a schematic diagram of the structure of the third type of tubular excitation fuse after being triggered, as provided in the embodiments of this application; Figure 7This is a schematic diagram of the structure of the fourth type of tubular excitation fuse provided in the embodiments of this application; Figure 8 This is a schematic diagram of the structure of the fifth type of tubular excitation fuse provided in the embodiments of this application. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0028] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, systems, products, or apparatuses.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] Currently, traditional photovoltaic (PV) fuses need to adapt to the unique operating conditions of PV systems, such as high DC voltage, large current fluctuations, and long-term outdoor operation. In PV systems, existing fuses face two major technological bottlenecks, making it difficult to meet the industry's development needs. First, the DC side of a PV system consists of multiple PV panels connected in parallel, resulting in extremely low fault current multiples, such as a minimum fault current of only 1.5 times the rated value. The design principle of fuses dictates that they cannot simultaneously meet the contradictory requirements of "long-term stable operation under rated current and rapid melting under 1.5 times overload current," easily leading to problems such as failure to trip under low overload or malfunction under normal current, seriously affecting system safety and power generation efficiency. Second, as PV systems upgrade to 1500V high voltage levels, the protection range expands significantly. Fuses need to cover a full range of protection scenarios, from small overload multiples to large short circuits of tens of times the rated current. The technology and arc-extinguishing capabilities of traditional fuses are insufficient to meet the wide-range protection requirements, becoming a key bottleneck restricting the performance improvement of PV protection systems.

[0031] To address the aforementioned problems, this application provides a tubular excitation fuse. This tubular excitation fuse can be applied in circuit protection scenarios. The tubular excitation fuse includes a first housing, a second housing, a third housing, an excitation source, a first motion mechanism, and a conductor. The second and third housings are disposed within the first housing. A first cavity is disposed within the second housing, and a second cavity is disposed within the third housing. The second and third housings are combined to form an inner housing, and the first and second cavities are combined to form a first inner cavity. A first terminal is disposed at a first end of the first housing, and a second terminal is disposed at a second end of the first housing. One end of the conductor is connected to the first terminal, and the conductor passes through the inner housing with its second end connected to the second terminal. The excitation source is disposed at the first end of the second housing and is used to release high-pressure gas into the first cavity when triggered. The first motion mechanism is disposed within the first cavity, and the conductor is disposed in the impact direction of the first motion mechanism. This new fuse structure combines an excitation fuse with a traditional fuse. By placing the excitation source and motion mechanism inside the housing of a traditional tubular fuse, the excitation source can receive external trigger signals to quickly cut off the circuit, achieving the function of an excitation fuse while maintaining the universal size and structure of traditional fuses. This allows for direct replacement of existing fuses in current applications, effectively addressing the shortcomings of traditional protection devices under complex operating conditions. It can curb safety hazards such as battery thermal runaway and PCS failure, while meeting industry standard compliance requirements, reducing the system's total lifecycle cost, and improving economic efficiency. This solution is applicable to various scenarios, including but not limited to the applications mentioned above.

[0032] The specific methods will be described in detail below.

[0033] Please see Figures 1-8This application also provides a tubular excitation fuse, including a first housing 10, a second housing 20, a third housing 30, an excitation source 50, a first motion mechanism 61, and a conductor 70; the second housing 20 and the third housing 30 are disposed in the first housing 10; a first cavity 210 is disposed in the second housing 20, and a second cavity 310 is disposed in the third housing 30, the second housing 20 and the third housing 30 are combined to form an inner housing, and the first cavity 210 and the second cavity 310 are combined to form a first inner cavity; the first housing 10's first... One end of the first housing 10 is provided with a first terminal 110, and the second end of the first housing 10 is provided with a second terminal 120; one end of the conductor 70 is connected to the first terminal 110, the conductor 70 passes through the inner housing and the second end is connected to the second terminal 120; the excitation source 50 is provided at the first end of the second housing 20, and is used to release high-pressure gas into the first cavity 210 when triggered; the first motion mechanism 61 is provided in the first cavity 210, and the conductor 70 is provided in the impact direction of the first motion mechanism 61.

[0034] In a specific implementation, the first housing 10 can be an insulating tube, which can be a ceramic tube made of ceramic material commonly used in traditional fuses or a glass fiber round tube made of melamine-glass fiber composite material, preferably using a 95 ceramic square tube structure.

[0035] Optionally, the tubular excitation fuse may also include a sealing cover plate for sealing both ends of the insulating tube. A first terminal 110 extends from the sealing cover plate. The first terminal 110 and the second terminal 120 are used to form an electrical connection between the tubular excitation fuse in this embodiment and the external protected circuit to prevent moisture or corrosive gases in the external environment from entering the interior of the insulating tube and thus affecting the resistance value of the product.

[0036] Specifically, the inner shell of the tubular excitation fuse (composed of multiple sub-shells, such as the second shell 20, the third shell 30, the fourth shell 90, etc.) is made by adding a certain amount of glass fiber to high-temperature resistant engineering plastics such as PPS or PA66 for toughening and then molding it through injection molding.

[0037] The first housing 10 is provided with a penetration cavity, and the two ends of the penetration cavity are the two ends of the first housing 10. The first terminal 110 includes a first sub-cover plate 111, and one end of the second terminal 120 includes a second sub-cover plate 121. The first sub-cover plate 111 and the second sub-cover plate 121 are respectively disposed at the two ends of the first housing 10 to cover the two ends of the first housing 10. The two ends of the conductor 70 are respectively connected to the first sub-cover plate 111 and the second sub-cover plate 121. A third wiring portion 112 extends from the first sub-cover plate 111, and the first terminal 110 is connected to the main circuit through the third wiring portion 112. A fourth wiring portion 122 extends from the second sub-cover plate 121, and the second terminal 120 is connected to the main circuit (i.e., the protected circuit) through the fourth wiring portion 122. The first sub-cover plate 111 and the second sub-cover plate 121 can be circular, rectangular or other shapes. The first sub-cover plate 111 and the second sub-cover plate 121 should be adapted to the size and shape of the cross-section of the penetration cavity of the first housing 10. The other end of the first terminal 110 and the second terminal 120 is a wiring portion (i.e., the third wiring portion 112 and the fourth wiring portion 122) extending from the first cover plate. The third wiring portion 112 and the fourth wiring portion 122 can be rectangular, columnar or other structures, and are not uniquely limited here.

[0038] The first sub-cover plate 111 and the second sub-cover plate 121 are both used to form an electrical connection with the conductor 70 inside the first housing 10, and the third wiring part 112 and the fourth wiring part 122 are both used to form an electrical connection between the tubular high-voltage smart fuse in this embodiment and the external protected circuit.

[0039] Furthermore, the tubular excitation fuse also includes a sealing cover (such as...). Figures 1-8 The second cover plate 141 and the third cover plate 142 are both flat plate structures adapted to the cross-sectional dimensions and shape of the first housing 10. Corresponding through holes can be provided in the middle of the second cover plate 141 and the third cover plate 142, so that the second cover plate 141 and the third cover plate 142 can pass through the third wiring part 112 and the fourth wiring part 122 respectively and make close contact with the two end faces of the first housing 10 and the first cover plate. At the same time, fixing holes can be provided at the edges of the second cover plate 141 and the third cover plate 142 where they contact the first housing 10, so that the second dry plate can be fixed at both ends of the first housing 10 by bolts, positioning pins and other fasteners, so that the openings at both ends of the first housing 10 are sealed to prevent moisture or corrosive gases in the external environment from entering the interior of the first housing 10 and corroding the internal structure, thereby affecting the resistance value of the product.

[0040] The second housing 20 has a first cavity 210, which is divided into a high-pressure gas chamber and a movable chamber by a first motion mechanism 61. A third cavity 220 is also provided at the first end of the second housing 20. The excitation source 50 is disposed in a receiving hole 230 between the first cavity 210 and the third cavity 220. The receiving hole 230 is a through hole with a constricted opening, and it communicates with both the first cavity 210 and the third cavity 220. The high-pressure gas chamber is a cylindrical structure. The constricted opening 230 is used to place the excitation source 50. This high-pressure gas chamber serves as the initial receiving space for the high-pressure gas generated after the gunpowder inside the excitation source 50 is detonated.

[0041] Furthermore, a sealing layer 221 is provided in the third cavity 220. The sealing layer 221 is used to seal the receiving hole 230 and fix the excitation source 50. A circuit board 225 is provided between the receiving hole 230 and the sealing layer 221. The excitation source 50 is connected to the circuit board 225 to receive external excitation signals through the circuit board 225.

[0042] In specific implementation, the third cavity 220 is filled with sealant to form a sealing layer 221, isolating the third cavity 220 from the receiving hole 230; simultaneously, the sealant also holds the excitation source 50 in place. The ignition tube can be fixed in the receiving hole 230 by the sealant. The two electrodes of the excitation source 50 extend beyond the constricted structure of the receiving hole 230 and are electrically connected to the external trigger control circuit arranged in the circuit board 225 in the third cavity 220, so as to receive external excitation signals through the external trigger control circuit. A groove is provided on the side wall near the top of the first motion mechanism 61, and a first sealing element is installed in the groove to reduce the leakage of high-pressure gas in the high-pressure gas chamber; the first motion mechanism 61 can move rapidly downward along the side wall of the first cavity 210 under the pushing action of the high-pressure gas and impact the conductor 70.

[0043] The third cavity 220 is connected to the high-pressure gas chamber through a constriction (accommodation hole 230). The third cavity 220 houses a circuit board 225. The circuit board 225 is used to fix the two electrodes of the excitation source 50 on one hand, and to fix the connecting wire of the external control signal on the other hand. One end of the connecting wire of the external control signal is fixed to the pad at a specific position on the circuit board 225 by soldering, and the other end passes through the sealing cover and the first terminal 110 to connect to the connector that can connect to the external signal, thereby realizing the access of the external trigger signal.

[0044] The third cavity 220 has a first opening 222 at one end near the first terminal 110, or the third cavity 220 has a first opening 222 at one end near the side wall of the first housing 10; a first insulating layer 223 is provided on the first opening 222. When the first opening 222 faces the first terminal 110, the first insulating layer 223 is fixed to the first terminal 110. When the first opening 222 faces the side wall of the first housing 10, the first insulating layer 223 is fixed to the side wall of the first housing 10; a first arc-extinguishing layer 224 is filled between the first insulating layer 223 and the sealing layer 221.

[0045] In a specific implementation, a first insulating layer 223 is placed on top of the third cavity 220 to prevent short circuits between the electrodes of the excitation source 50 and the connecting wires and the sealing cover. This first insulating layer 223 can be an insulating board, an insulating rubber pad, or a plate-shaped component made of other insulating materials; its uniqueness is not limited here. A first arc-extinguishing layer 224 is used to extinguish arcs between the first insulating layer 223 and the sealing layer 221, eliminating sparks or arcs generated by faults in the circuit board 225 or by high-pressure gas impacts.

[0046] In one possible embodiment, the angle between the first impact direction and the cross-section of the first housing 10 is 0°-180°.

[0047] The arrangement of the inner housing within the first housing 10 affects the first impact direction and the arrangement of the conductor 70. In this embodiment, a horizontal arrangement of the inner housing means that the angle between the first impact direction and the cross-sectional area of ​​the first housing 10 is 90°, and a vertical arrangement of the inner housing means that the angle between the first impact direction and the cross-sectional area of ​​the first housing 10 is 0° or 180°.

[0048] It is understandable that, since the conductor 70 needs to be positioned in a location that can be impacted by the first moving mechanism 61, when the inner shell is horizontal, the conductor 70 is vertically positioned (i.e., perpendicular to the first impact direction); when the inner shell is vertically positioned, the conductor 70 is horizontally positioned (i.e., perpendicular to the first impact direction).

[0049] For example, the first end of the conductor 70 is electrically connected to the first terminal 110, and the second end of the conductor 70 is electrically connected to the second terminal 120. The conductor 70 can be made of conductive metal materials such as copper, aluminum, or copper-aluminum composite. The conductor 70 can be directly connected to the first terminal 110 and the second terminal 120 by connecting its ends (first end and second end) directly; alternatively, the ends (first end and second end) of the conductor 70 can be CNC thinned, then bent at 90° to form a horizontal connection part, and then electrically connected to the connection terminal by resistance welding or other processes.

[0050] In one possible embodiment, the conductor 70 includes a first wiring portion 71, a functional portion 72, and a second wiring portion 73, wherein the angle between the functional portion 72 and the first wiring portion and the second wiring portion 73 is 0°-90°.

[0051] Optionally, the conductor 70 can be arranged in a right-angled Z-shape inside the first housing 10, and the two ends of the conductor 70 can be electrically connected to the terminals at both ends of the first housing 10. The conductor 70 can be CNC thinned at specific positions at its two ends, then bent at 90°, and then connected to the internal end face of the corresponding terminals by resistance welding. The conductor 70 can be divided into three parts: a first connecting part, a functional part 72, and a second connecting part. The first connecting part is connected to one side of the terminal, and the second connecting part is electrically connected to the other side of the terminal. The functional part 72 is set at an angle of 0°-90° with the first and second connecting parts, for example, 0°, 45°, 90°, etc., and is located between the first and second connecting parts. The functional part 72 is located directly below the high-pressure gas chamber in the first inner housing, directly opposite the first motion mechanism 6. A V-shaped or U-shaped groove structure, formed by thinning through CNC or die stamping, is provided on the upper and lower surfaces of the first motion mechanism 61 directly below or near the end position. The end face of the first motion mechanism 61 has the same shape as the broken weak part 74. When the first motion mechanism 61 moves downward rapidly under the action of high pressure gas, its end impacts the broken weak part 74, thereby breaking the weak part on both sides at the same time. The broken part in the middle of the two broken weak parts 74 detaches from the conductor 70 and moves downward together with the first motion mechanism 61.

[0052] In one possible embodiment, an extension 313 extends from the bottom of the third housing 30 to contact the functional part 72 to form an extension 313; the extension 313 divides the second cavity 310 into a first sub-cavity 311 and a second sub-cavity 312; the second opening 3111 of the first sub-cavity 311 and the third opening 3121 of the second sub-cavity 312 are correspondingly disposed with at least one disconnected weak point 74 on the conductor 70; the disconnected weak point 74 is disposed in the impact direction of the first motion mechanism 61.

[0053] In a specific implementation, a V-shaped or U-shaped groove structure with a break or weak part 74 is provided on the upper and lower surfaces of the two end positions of the functional part 72 facing the first motion mechanism 61. The break or weak part is formed by thinning through CNC or die stamping. A V-shaped or wedge-shaped bending weak point is formed on the conductor 70 at a certain position outside the corresponding break or weak part 74. The lower surface is thinned more deeply and the upper surface is slightly thinned. So when the first motion mechanism 61 moves downward rapidly under the action of high pressure gas, its end impacts the position or vicinity of the break or weak part 74, breaking the two break or weak parts 74. When the break point moves downward with the first motion mechanism 61, it bends downward along the bending weak point until the first motion mechanism 61 reaches the predetermined position.

[0054] An extension 313 can be provided at the bottom of the second cavity 310 of the third housing 30 (i.e., the end in the first impact direction) to divide the second cavity 310 into two chambers (i.e., the first sub-chamber 311 and the second sub-chamber 312). The extension 313 is used to fix and support the functional part 72 of the conductor 70. The disconnected weak part 74 on the conductor 70 is located on both sides of the extension 313. So when the first motion mechanism 61 moves downward and cuts into the disconnected weak part 74, the disconnected weak part 74 of the edge of the conductor 70, which is supported and fixed by the extension 313, breaks downward and bends downward along the respective bending weak point in the respective receiving chamber as the first motion mechanism 61 moves downward, until it is close to the inner wall of the respective receiving chamber. It is understandable that the function of the functional unit 72 is that the disconnect weak part 74 provided on the functional unit 72 is disconnected by the impact of the first motion mechanism 61 to cut off the protected circuit, wherein the first sub-chamber 311 and the second sub-chamber 312 are respectively used to accommodate the corresponding disconnect weak part 74 that is broken.

[0055] The conductor 70 is located between the first cavity 210 and the second cavity 310. On each of its two sides facing the end of the first motion mechanism 61, there is a V-shaped, U-shaped or other similarly functional groove structure formed by CNC or die stamping processes. This serves as a weak breakage part 74 that the conductor 70 is easily broken. The weak breakage parts 74 are arranged in pairs. The impact end face of the first motion mechanism 61 is a planar structure. Thus, when the first motion mechanism 61 moves downward under the push of high-pressure gas, its end impacts the middle of the two weak breakage parts 74, thereby breaking the weak points on both sides at the same time. The broken part in the middle of the two weak breakage parts 74 detaches from the conductor 70 and moves towards the second cavity 310 together with the first motion mechanism 61.

[0056] In one possible embodiment, the second housing 20 and / or the third housing 30 are provided with a limiting groove 41, and the portion of the conductor 70 passing through the inner housing is accommodated in the limiting groove 41.

[0057] Optionally, the limiting groove 41 can be provided only on the second housing 20, or only on the third housing 30, or both the second housing 20 and the third housing 30 can be provided with the limiting groove 41. The limiting groove 41 is adapted to the size of the conductor 70 and serves as a fixing structure for accommodating and limiting the conductor 70, so as to clamp and fix the conductor 70 in the inner housing.

[0058] In one possible embodiment, the tubular excitation fuse is further provided with an arc-extinguishing fuse 80, the first end of which is connected to the first terminal 110 or the first end of the conductor 70, and the second end of which is connected to the second terminal 120 or the second end of the conductor 70.

[0059] In the specific implementation, an arc-extinguishing fuse 80 is set in the tubular excitation fuse. When the conductor 70 is broken, the current in the main circuit of the protected circuit is transferred to the arc-extinguishing fuse 80, so that the arc-extinguishing fuse 80 melts and cuts off the protected circuit quickly.

[0060] Furthermore, at least one first fixing part 320 is provided on the outer wall of the third housing 30; the arc-extinguishing melt 80 includes a first extension part 81, and the first end of the arc-extinguishing melt 80, the first extension part 81 and the second end of the arc-extinguishing melt 80 are connected in sequence; the first extension part 81 is arranged around the outer wall of the third housing 30 and fixed to the outer wall of the third housing 30 by the first fixing part 320.

[0061] In a specific implementation, the two ends of the arc-extinguishing melt 80 can be connected between the first terminal 110 and the second terminal 120, respectively, or the two ends of the arc-extinguishing melt 80 can be connected to the two ends of the weak disconnection portion 74 of the conductor 70, respectively. The arc-extinguishing melt 80 is provided with a first extension portion 81, which is a continuous structure between the two ends of the arc-extinguishing melt 80. It is arranged along the outer wall of the third housing 30 and is adapted to the contour of the outer wall of the third housing 30, thereby increasing the length of the arc-extinguishing melt 80 to meet the arc-extinguishing distance requirements of high-voltage disconnection and improve the disconnection capacity.

[0062] Furthermore, at least one first fixing part 320 can be provided on the outer wall of the third housing 30. The first fixing part 320 is a magnetic component, and the arc-extinguishing melt 80 is a metal component. The first fixing part 320 and the arc-extinguishing melt 80 are fixed by magnetic attraction. The first fixing part 320 can be a protruding structure, a concave structure, or a magnetic structure, and is not limited to a single type.

[0063] Furthermore, the first extension 81 is also provided with at least one first connecting part 811, which is combined with the at least one first fixing part 320 to fix the first extension 81 to the outer wall of the third housing 30.

[0064] Optionally, multiple first connecting parts 811 may be provided on the arc-extinguishing melt 80, which are connected to the first fixing part 320 to fix the arc-extinguishing melt 80 to the outer wall of the third housing 30.

[0065] Furthermore, the first fixing part 320 is a protruding structure or a concave structure, and the first connecting part 811 is a concave structure or a protruding structure.

[0066] In practice, the concave structure can be a groove, a through hole, or other structure with concave features; the convex structure can be a convex part.

[0067] Optionally, when the first fixing part 320 is a protruding structure, the first connecting part 811 can be a through hole or a groove; when the first fixing part 320 is a concave structure, the first connecting part 811 can be a protruding structure, such as a column or wedge; when the first fixing part 320 is a magnetic structure, since the arc-extinguishing melt 80 is made of metal material, the arc-extinguishing melt 80 can be directly adsorbed onto the outer wall of the third housing 30. At this time, a through hole, groove or protruding structure can also be combined to increase the fixing effect.

[0068] In a specific implementation, the first end of the arc-extinguishing melt 80 is connected to the connecting terminal by resistance welding or laser welding. Then, the arc-extinguishing melt 80 is bent into several V-shapes, U-shapes, or extended into the first fixing part 320 on the side wall of the third housing 30 without bending.

[0069] For example, the first extension 81 of the arc-extinguishing melt 80 is arranged along the surface of the side wall of the third housing 30 and the surface of the second motion mechanism 62 that protrudes from the outer wall of the third housing 30. It is then fixed to the first fixing part 320 in the lower row by the first through hole formed on the arc-extinguishing melt 80. Then it passes through the bottom of the third housing 30 to the other side, and then passes through each of the first fixing parts 320 and the second motion mechanism 62 in the same manner from bottom to top until the uppermost first fixing part 320 is fixed by the first through hole on the arc-extinguishing melt 80. Then it extends in a non-bent form, or bends into several V-shapes, U-shapes, etc., and is connected to the connecting terminal on the other side by resistance welding or laser welding.

[0070] The second internal cavity of the first housing 10 is filled with an arc-extinguishing material 130, which mainly surrounds the arc-extinguishing melt 80 to limit the spread of the electric arc generated when the arc-extinguishing melt 80 is disconnected and to extinguish the electric arc, ensuring that the product can be safely disconnected.

[0071] In one possible embodiment, the tubular excitation fuse further includes a second motion mechanism 62, and at least one through portion 330 is provided on the side wall of the third housing 30. When the arc-extinguishing fusible element 80 is arranged on the outer wall of the third housing, it covers the fourth opening of the through portion 330. The second motion mechanism 62 includes a breakable part 621, and at least one first end 622 extends from the breakable part 621 to form at least one first end 622. The at least one first end 622 is respectively inserted into the at least one through portion 330, and the breakable part 621 is arranged in the first impact direction.

[0072] In a specific implementation, the third housing 30 is provided with a second cavity 310 to accommodate the broken portion 621 or the bent portion of the conductor 70 when it is broken. A through portion 330 penetrating each of the two side walls of the third housing 30 is provided. The cross-section of the through portion 330 can be a rectangular groove, a circle, or other shapes. The through portion 330 is spaced a predetermined distance from the bottom of the second cavity 310. A second motion mechanism 62 with an interference fit is inserted into the through portion 330. By providing an angled structure (inverted triangular groove) with an angle of 40°-75° on the functional part 72 of the conductor 70, this part of the conductor 70 is easily broken by the first motion mechanism 61, resulting in the corresponding broken portion 621. The angled structure is located in the impact direction of the first motion mechanism 61 within the second cavity 310. The first end of the second motion mechanism 62 is a planar structure and extends from the through portion 330 within the second cavity 310 outwards from the third housing 30, with the end portion protruding outside the third housing 30.

[0073] In one possible embodiment, at least one recess 340 is provided on the side wall of the third housing 30, and the arc-extinguishing melt 80 covers the fifth opening of the recess 340 when it is arranged on the outer wall of the third housing; the second motion mechanism 62 includes at least one first end 622; the at least one first end 622 is accommodated in the at least one recess 340, and the at least one first end 622 is arranged in the first impact direction.

[0074] In a specific implementation, the second motion mechanism 62 includes at least one independent first end 622, which is housed in the recess 340. After the first motion mechanism 61 breaks the weak part 74, it continues to move towards the first end 622 in the recess 340 at the bottom of the second cavity 310 and impacts the first end 622 to push it out from the fifth opening of the recess 340 and break the arc-extinguishing melt 80.

[0075] Optionally, one or more first ends 622 of the second motion mechanism 62 can be provided. When only one first end 622 is provided, a through portion 330 is opened on the side wall of the third housing 30, and the first end 622 passes through the through portion 330 to exit the third housing 30 and enter the second internal cavity, or the first end 622 is flush with the outer wall of the third housing 30. At the same time, the first extension portion 81 is arranged on the fourth opening of the through portion 330 on the outer wall of the third housing 30, so that the disconnect portion 621 is broken by the impact of the first motion mechanism 61, pushing the first end 622 out of the fourth opening and breaking the arc-extinguishing melt 80, thereby completing the rapid arc extinguishing.

[0076] Optionally, when multiple first ends 622 are provided, multiple corresponding through portions 330 and / or recessed portions 340 are provided. That is, the number of through portions 330 can be the same as the number of first ends 622, or the sum of the number of through portions 330 and recessed portions 340 can be the same as the number of first ends 622.

[0077] Taking two first ends 622, a through part 330 and a concave part 340 as an example, a non-penetrating concave part 340 (such as a groove, recess, etc.) can be provided on the side wall of the third housing 30, and a through cavity is provided as the through part 330. One first end 622 of the second motion mechanism 62 is housed in the concave part 340 and the other first end 622 is housed in the through part 330. When the disconnected part 621 is broken by the first motion mechanism 61, the two first ends 622 move toward the concave part 340 and the through part 330 under the influence of the component force. Since the concave part 340 is not a through cavity, the first end 622 in the concave part 340 will be limited, while the first end 622 in the through part 330 will break through the fourth opening and break the arc-extinguishing melt 80, thereby completing the rapid arc extinguishing.

[0078] In one possible embodiment, at least one recess 340 is provided on the side wall of the third housing 30, and the at least one first end portion 622 is accommodated in the at least one recess 340.

[0079] Optionally, only the recessed portion 340 can be provided. The recessed portion 340 can also be a through cavity. The first end portion 622 is completely accommodated in the recessed portion 340. After the first motion mechanism 61 is triggered and breaks the weak part 74, it continues to move along the second cavity 310 to the bottom of the second cavity 310, and then directly impacts the first end portion 622, pushing the first end portion 622 out of the recessed portion 340, thereby breaking the arc-extinguishing melt 80.

[0080] In the example of multiple through portions 330, the cooperation relationship between each through portion 330 and the first end portion 622 is the same as that of the single through portion 330, and will not be described in detail here; in the example of multiple recessed portions 340, the cooperation relationship between each recessed portion 340 and the first end portion 622 is the same as that of the single recessed portion 340, and will not be described in detail here either.

[0081] In one possible embodiment, the tubular excitation fuse further includes a third motion mechanism 63, which is disposed on the disconnection portion 621. The first end of the third motion mechanism 63 is provided with a cutting structure 631. When the first motion mechanism 61 impacts the disconnection portion 621, the disconnection portion 621 is broken by impacting the third motion mechanism 63, and the first end 622 is pushed through the through portion 330 and out of the third housing 30 to break the arc-extinguishing fusible element 80.

[0082] In a specific implementation, the second motion mechanism 62 includes multiple sub-motion mechanisms. Each sub-motion mechanism is arranged facing each other in the second cavity 310 with its apex touching or spaced a certain distance apart, forming a break 621. That is, the first end of each sub-motion mechanism is the first end of the second motion mechanism 62, and the second ends of each sub-motion mechanism converge to form the break 621. A third motion mechanism 63 is provided above the two second motion mechanisms 62. The first end of the third motion mechanism 63 is a planar rectangle, and the second end is a pointed wedge. The inclined plane of the second end fits into the oblique structure of the second motion mechanism 62, and the pointed wedge of the second end of the third motion mechanism 63 is inserted into the gap or contact point of the second motion mechanism 62. Thus, when the first motion mechanism 61 cuts the weak part 74 and continues to move downward along the inner wall of the second cavity 310, the second end of the third motion mechanism 63 applies force to the disconnected part 621 of the second motion mechanism 62, thereby pushing multiple sub-motion mechanisms toward the through part 330, thereby squeezing multiple sub-motion mechanisms out of the second cavity 310 along the through part 330, thereby breaking the arc-extinguishing melt 80 arranged on the outer wall of the third housing 30, and finally cutting off the main circuit.

[0083] In one possible embodiment, the tubular excitation fuse further includes at least one fourth housing 90, wherein the arc-extinguishing fusible element 80, when disposed on the outer wall of the third housing, covers the fourth opening of the through portion 330 or the fifth opening of the recess 340; the at least one fourth housing 90 is respectively disposed on the outer wall of the second housing 20 to cover the through portion 330, thereby fixing the arc-extinguishing fusible element 80 covering the through portion 330; the fourth housing 90 includes a fourth cavity 91, wherein the first end portion 622 extends from the through portion 330 into the fourth cavity 91.

[0084] In a specific implementation, the fourth housing 90 is a cap-shaped housing with a hollow cavity. Its fourth cavity 91 can be fitted onto the first end of the second motion mechanism 62, which covers the arc-extinguishing melt 80, while simultaneously covering the fourth opening of the through portion 330 on the outer wall of the third housing 30. Optionally, the fourth housing 90 can be connected and fixed to the outer wall of the third housing 30 at its edge using screws, glue, welding, or other fixing methods.

[0085] The following is combined with Figure 1 and Figure 2 The working principle of the tubular excitation fuse of this application can be specifically described as follows (taking a low-multiplier overload abnormal current as an example): Under normal conditions, the current flows through the terminals and the conductor 70. The resistance of the arc-extinguishing fuse 80 is much greater than that of the conductor 70, so the current basically does not flow through the arc-extinguishing fuse 80. When an abnormal external current occurs, a trigger control signal sends a large pulse current to the excitation source 50, causing the gunpowder inside the excitation source 50 to explode and generate high-pressure gas. This high-pressure gas pushes the first motion mechanism 61 to move rapidly downward, applying an impact force to the disconnected weak part 74 on the conductor 70, cutting off the disconnected weak part 74, and then pushing the disconnected weak part 74 into the second cavity 310. Because the first motion mechanism 61 moves very fast, it can quickly open the insulation distance between the breaks, thereby reducing or eliminating the impact of arcing between the breaks. In addition, when the conductor 70 is cut off, the resistance value increases rapidly, and the current begins to transfer to the branch of the arc-extinguishing fuse 80. The first motion mechanism 61 continues to move along the first cavity 210 and the second cavity 310. When the cavity 310 moves downward, it transmits the impact force to the top of the third motion mechanism 63. As a result, the pointed wedge-shaped end of the third motion mechanism 63 applies force to the oblique end of the second motion mechanism 62 and pushes the second motion mechanism 62 to both sides, squeezing it out of the second cavity 310. The outward movement of the second motion mechanism 62 further transmits the impact force to the arc-extinguishing melt 80 covered below it. Since the arc-extinguishing melt 80 is fixed on the first limiting post, the impact force can break the arc-extinguishing melt 80 near the limiting post. Since the arc-extinguishing melt 80 at this position is covered in a large amount of arc-extinguishing material 130, the arc generated between the fracture points is quickly extinguished, thus achieving the breaking requirements of the high-voltage excitation fuse of the present invention.

[0086] In one possible embodiment, please refer to Figures 3 to 8 The at least one fourth housing 90 is respectively covered on the outer wall of the second housing 20 to cover the inner recess 340; the fourth housing 90 includes a fourth cavity 91, and the first end 622 of the second motion mechanism 62 extends from the inner recess 340 into the fourth cavity 91.

[0087] In a specific implementation, a connecting groove (i.e., a recessed portion 340) penetrating the bottom surface is provided on each of the two side walls of the bottom of the third housing 30. The cross-section of the connecting groove is a rectangular groove structure. A second motion mechanism 62 with an interference fit is inserted into the connecting groove, so that the top of the second motion mechanism 62 is higher than the bottom surface of the second cavity 310, and part of its upper surface is not blocked by the inner wall of the second cavity 310. Therefore, when the first motion mechanism 61 cuts the weak part 74 and continues to move downward along the inner wall of the second cavity 310, the first motion mechanism 61 impacts the two ends of the unblocked top surface of the second motion mechanism 62, causing it to move downward along the inner wall of the connecting groove with the first motion mechanism 61. A row of first fixing portions 320 is provided on each side edge of the connecting groove at the bottom of the third housing 30. The first fixing portions 320 are slightly higher than the bottom surface of the third housing 30 by a certain distance.

[0088] The two ends of the arc-extinguishing melt 80 are respectively connected to the two sides of the functional part 72 of the conductor 70 or the first connecting part and the second connecting part on both sides of the functional part 72 by resistance welding or laser welding. Its first extension 81 passes through at least one fixed part on the third housing 30 and covers the side wall and bottom surface of each of the second motion mechanisms 62 that are exposed outside the bottom surface of the third housing 30. That is, the first end of the arc-extinguishing melt 80 is welded to the terminal, and then the arc-extinguishing melt 80 is bent and extended from the first end along the outer wall of the third housing 30 to obtain at least one first bent part to form the first extension 81. After passing through each of the fixed parts in sequence, the second end of the arc-extinguishing melt 80 is welded to the first connecting part.

[0089] Below, referring to Figure 3 and... Figure 8The working principle of the tubular excitation fuse of this application can be specifically described as follows (taking a low-multiplier overload abnormal current as an example): Under normal conditions, the current flows through the terminals and the conductor 70. The resistance of the arc-extinguishing fuse 80 is much greater than that of the conductor 70, so the current basically does not flow through the arc-extinguishing fuse 80. When an abnormal external current occurs, a trigger control signal sends a large pulse current to the excitation source 50, causing the gunpowder inside the excitation source 50 to explode and generate high-pressure gas. This high-pressure gas pushes the first motion mechanism 61 to move rapidly downward, applying an impact force to the disconnected weak part 74 on the conductor 70, cutting off the disconnected weak part 74, and then pushing it into the second cavity 310. Because the first motion mechanism 61 moves very fast, it can quickly open the insulation distance between the breaks, thereby reducing or eliminating the impact of arcing between the breaks; in addition, when the conductor 70 After being cut off, the resistance value increases rapidly, and the current begins to transfer to the branch of the arc-extinguishing fuse 80. The first motion mechanism 61 continues to push the second motion mechanism 62 downward on both sides, further transmitting the impact force to the arc-extinguishing fuse 80 covered below. Since the arc-extinguishing fuse 80 is fixed on the limiting post, the impact force can pull the arc-extinguishing fuse 80 off near the limiting post. Furthermore, since the arc-extinguishing fuse 80 at this position is covered in a large amount of arc-extinguishing material 130, the arc generated between the breaks is quickly extinguished, thus achieving the breaking requirements of the high-voltage excitation fuse of the present invention.

[0090] In one possible embodiment, please refer to Figures 3 to 6 The arc-extinguishing melt 80 is further provided with at least one second extension 82 connected between the first extension 81 and the second end of the arc-extinguishing melt 80 and connected in sequence. The at least one second extension forms a plurality of second bends in the second internal cavity of the first housing 10.

[0091] For details, please refer to Figure 7 and Figure 8 The tubular excitation fuse also includes at least one fourth housing 90, which extends toward the second terminal 120 to form at least one third extension 92; the arc-extinguishing fuse 80 includes at least one fourth extension 83 connected between the first extension 81 and the second end of the arc-extinguishing fuse 80 and connected in sequence, and the at least one fourth extension 83 is arranged on the outer wall of the third extension 92.

[0092] In a specific implementation, the fourth housing 90 can also be designed with a certain extension, so that the overall length of the fourth housing 90 is longer, and a fourth extension 83 is provided on the arc-extinguishing melt 80. The fourth extension 83 is arranged on the third extension 92, which increases the arc-extinguishing melt 80 to meet the arc-extinguishing distance requirements of high-voltage disconnection, while fixing the arc-extinguishing melt 80.

[0093] It is understandable that the number of fourth extension sections 83 is not limited. The number of fourth extension sections 83 can be increased through various folding arrangements to further extend the arc-extinguishing melt 80. For example, it can be extended from the outer wall of the third shell 30 to the third extension section 92, then folded back to the outer wall of the third shell 30, and then extended to the third extension section 92. In this way, the number of fourth extension sections 83 can be increased through multiple extensions and bends.

[0094] Understandably, as the number of fourth extension sections (83) increases, their stability will deteriorate, leading to displacement and other issues such as short circuits or breakage followed by adhesion, thereby reducing the reliability of the product.

[0095] Based on this, in one possible embodiment, the tubular excitation fuse further includes a first coupling member 93, on which a second coupling portion 931 is provided; the third extension portion 92 is provided with a second fixing portion 9221 near the second end 922 of the second terminal 120; the first coupling member 93 is coupled with the second fixing portion 9221 through the second coupling portion 931 to clamp and fix the corresponding third extension portion 92 on the second end 922.

[0096] In this embodiment, by providing a protruding fixing position and a grooved clamping piece at the second end 922 of the fourth housing 90, after the first end of the arc-extinguishing melt 80 is welded to the first connecting part, it extends laterally through the fixing part and then bends downward, extending along the height direction of the third housing 30. After being fixed and bent at the fixing position at its bottom, it bends laterally or extends horizontally to another fixing position, and then passes through the fixing position in the opposite direction. It then extends upward along the height direction of the third housing 30 until it reaches the fixing part. Finally, the other end of the arc-extinguishing melt 80 is welded to the second connecting part, thereby greatly increasing the length of the arc-extinguishing melt 80 to meet the arc-extinguishing distance requirements of high-voltage disconnection.

[0097] The first connecting member 93 is a component with a second connecting portion 931. The second connecting portion 931 can be a through hole, a groove, or a protrusion. Conversely, the second connecting portion 931 can be a protrusion, and the second fixing portion 9221 can be a through hole, a groove, or a similar structure.

[0098] In one possible embodiment, the outer wall of the third extension 92 is provided with at least one first limiting part 921, which is used to isolate the fourth extension 83 from the body of the third extension 92.

[0099] In practice, at least one protrusion is provided on the extended height of the third shell 30 to prevent the arc-extinguishing melt 80 from sticking to the wall when it is bent, thereby causing carbonization of the third inner shell under the high temperature of arcing, resulting in poor insulation resistance when the product is broken.

[0100] In one possible embodiment, when the fourth extension portion 83 is disposed on the third extension portion 92, a second insulating layer 94 is provided between the third extension portion 92 and the fourth extension portion 83 for isolation.

[0101] In a specific implementation, an insulating silicone rubber pad can be adhered to the outer side of the third housing 30 in the height direction. This can prevent the plastic material on the surface of the third housing 30 from carbonizing due to the high temperature of the arc when the surface of the arc-extinguishing melt 80 is arced, thereby affecting the insulation performance of the product. At the same time, it can simplify the structural design.

[0102] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can easily conceive of variations or substitutions without departing from the spirit and scope of this application, and can make various alterations and modifications, including combinations of the different functions and implementation steps described above, as well as software and hardware implementation methods, all of which are within the protection scope of this application.

Claims

1. A tubular excitation fuse, characterized in that, It includes a first housing, a second housing, a third housing, an excitation source, a first motion mechanism, and a conductor; the second housing and the third housing are disposed within the first housing; The second housing has a first cavity, and the third housing has a second cavity. The second housing and the third housing are combined to form an inner housing, and the first cavity and the second cavity are combined to form a first inner cavity. The first end of the first housing is provided with a first terminal, and the second end of the first housing is provided with a second terminal; One end of the conductor is connected to the first terminal, and the conductor passes through the inner housing and its second end is connected to the second terminal. The excitation source is located at the first end of the second housing and is used to release high-pressure gas into the first cavity when triggered. The first motion mechanism is disposed in the first cavity, and the conductor is disposed in the first impact direction of the first motion mechanism.

2. The tubular excitation fuse according to claim 1, characterized in that, The second housing has a third cavity at its first end, and the excitation source is disposed in a receiving hole between the first cavity and the third cavity, the receiving hole being connected to both the first cavity and the third cavity. The third cavity is provided with a sealing layer, which is used to seal the receiving hole and fix the excitation source. The third cavity is provided with a first opening at one end near the first terminal, or the third cavity is provided with a first opening at one end near the side wall of the first housing; a first insulating layer is provided on the first opening, and when the first opening faces the first terminal, the first insulating layer is fixed to the first terminal, and when the first opening faces the side wall of the first housing, the first insulating layer is fixed to the side wall of the first housing. A first arc-quenching layer is filled between the first insulating layer and the sealing layer; A circuit board is disposed between the receiving hole and the sealing layer, and the excitation source is connected to the circuit board to receive external excitation signals through the circuit board.

3. The tubular excitation fuse according to claim 1, characterized in that, The angle between the first impact direction and the cross-section of the first housing is 0°-180°.

4. The tubular excitation fuse according to claim 1, characterized in that, The conductor includes a first wiring portion, a functional portion, and a second wiring portion, wherein the included angle between the functional portion and the first and second wiring portions is 0°-90°.

5. The tubular excitation fuse according to claim 4, characterized in that, An extension extends from the bottom of the third housing to contact the functional part to form an extension; the extension divides the second cavity into a first sub-chamber and a second sub-chamber; the second opening of the first sub-chamber and the third opening of the second sub-chamber are respectively disposed corresponding to at least one disconnected weak point on the conductor; the disconnected weak point is disposed in the first impact direction of the first motion mechanism.

6. The tubular excitation fuse according to claim 1, characterized in that, The second housing and / or the third housing are provided with a limiting groove, and the portion of the conductor passing through the inner housing is accommodated in the limiting groove.

7. The tubular excitation fuse according to claim 1, characterized in that, An arc-extinguishing fuse is also provided, with a first end of the arc-extinguishing fuse connected to the first terminal or the first end of the conductor, and a second end of the arc-extinguishing fuse connected to the second terminal or the second end of the conductor.

8. The tubular excitation fuse according to claim 7, characterized in that, At least one first fixing part is provided on the outer wall of the third housing; the arc extinguishing melt includes a first extension part, and the first end of the arc extinguishing melt, the first extension part and the second end of the arc extinguishing melt are connected in sequence; the first extension part is arranged around the outer wall of the third housing and is fixed to the outer wall of the third housing by the first fixing part.

9. The tubular excitation fuse according to claim 8, characterized in that, The first extension is further provided with at least one first connecting part, which is connected with the at least one first fixing part to fix the first extension to the outer wall of the third housing.

10. The tubular excitation fuse according to claim 9, characterized in that, The first fixing part is a protruding structure or a concave structure, and the first connecting part is a concave structure or a protruding structure.

11. The tubular excitation fuse according to claim 8, characterized in that, The first fixing part is a magnetic component, and the arc-extinguishing melt is a metal component; the first fixing part and the arc-extinguishing melt are fixed by magnetic attraction.

12. The tubular excitation fuse according to any one of claims 7-11, characterized in that, It also includes a second motion mechanism, wherein at least one through-hole is provided on the side wall of the third housing, and the arc-extinguishing melt, when disposed on the outer wall of the third housing, covers the fourth opening of the through-hole; the second motion mechanism includes a easily separable detachable portion, extending from the detachable portion to form at least one first end, the at least one first end respectively penetrating into the at least one through-hole, and the detachable portion being disposed in the first impact direction; or. The third housing has at least one recess on its side wall, and the arc-extinguishing melt covers the fifth opening of the recess when it is disposed on the outer wall of the third housing; the second motion mechanism includes at least one first end; the at least one first end is accommodated in the at least one recess, and the at least one first end is disposed in the first impact direction.

13. The tubular excitation fuse according to claim 12, characterized in that, It also includes a third motion mechanism, which is disposed on the disconnection portion. The first end of the third motion mechanism is provided with a cutting structure. When the first motion mechanism impacts the disconnection portion, it breaks the disconnection portion by impacting the third motion mechanism and pushes the first end through the through portion and out of the third housing to break the arc-extinguishing melt.

14. The tubular excitation fuse according to claim 12, characterized in that, It also includes at least one fourth housing, wherein the arc-extinguishing melt, when disposed on the outer wall of the third housing, covers the fourth opening of the through portion or the fifth opening of the aforementioned recessed portion; the at least one fourth housing is respectively disposed on the outer wall of the second housing to cover the through portion, thereby fixing the arc-extinguishing melt covering the through portion; the fourth housing includes a fourth cavity, and the first end extends from the through portion into the fourth cavity; or... The at least one fourth housing is respectively disposed on the outer wall of the second housing to cover the recess; the fourth housing includes a fourth cavity, and the first end of the second motion mechanism extends from the recess into the fourth cavity.

15. The tubular excitation fuse according to claim 8, characterized in that, The arc-extinguishing melt is further provided with at least one second extension section connected between the first extension section and the second end of the arc-extinguishing melt, and the at least one second extension section forms a plurality of second bends in the first housing.

16. The tubular excitation fuse according to claim 8, characterized in that, It also includes at least one fourth housing, which extends toward the second terminal to form at least one third extension; The arc-extinguishing melt includes at least one fourth extension connected between the first extension and the second end of the arc-extinguishing melt, and the at least one fourth extension is disposed on the outer wall of the third extension.

17. The tubular excitation fuse according to claim 16, characterized in that, The outer wall of the third extension is provided with at least one first limiting part, which is used to isolate the fourth extension from the body of the third extension.

18. The tubular excitation fuse according to claim 16, characterized in that, It also includes a first connecting member, on which a second connecting portion is provided; and a second fixing portion is provided at the second end of the third extension near the second terminal. The first connecting member is connected to the second fixing part through the second connecting part to clamp and fix the corresponding third extension part on the second end.

19. The tubular excitation fuse according to any one of claims 16-18, characterized in that, When the fourth extension is disposed on the third extension, a second insulating layer is provided between the third extension and the fourth extension for isolation.

20. The tubular excitation fuse according to claim 1, characterized in that, The first terminal block includes a first sub-cover plate, and one end of the second terminal block includes a second sub-cover plate. The first sub-cover plate and the second sub-cover plate are respectively provided at the two ends of the first housing to cover the two ends of the first housing. The two ends of the conductor are respectively connected to the first sub-cover plate and the second sub-cover plate; A third wiring portion extends from the first sub-cover plate, and the first wiring terminal is connected to the main circuit through the third wiring portion; A fourth wiring portion extends from the second sub-cover plate, and the second wiring terminal is connected to the main circuit through the fourth wiring portion.

Images