High-resistance pulse type fuse structure

Abstract

The utility model relates to the technical field of electrical safety protection devices, in particular to a high-resistance pulse type fuse structure. The fuse structure comprises an amine tube body provided with a through accommodating space; the inner cover assembly comprises a first inner cover and a second inner cover which are respectively arranged at the two ends of the amine pipe body in a sleeving manner and are communicated with the accommodating space; the fuse wire assembly comprises first fuse wires and a second fuse wire which are located in the containing space, the number of the first fuse wires is two, the two first fuse wires are connected to the two ends of the second fuse wire respectively, and the two first fuse wires are exposed and welded to the inner cover assembly; the carrier is located in the containing space and used for fixing the fuse assembly, and the two first melts are wound around the two ends of the carrier respectively. According to the invention, instantaneous high pulse can be resisted, so that a stable operation state is kept.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electrical safety protection devices, in particular to a high-impulse-resistant fuse structure. BACKGROUND

[0002] As an important circuit protection element, a fuse plays an irreplaceable role in ensuring electrical safety. With the increasing complexity of electronic devices, modern circuits require fuses not only for traditional overload protection, but also for other functions. However, fuses sold on the market according to the UL248-4 CLASS CC standard cannot meet the protection requirements of industrial motors and daily high-pulse electrical devices, resulting in the following defects:

[0003] 1. Frequent starting of the fuse causes the fuse to blow, leading to frequent replacement and increased costs.

[0004] 2. Poor current limiting capability.

[0005] 3. Limited product application scenarios, resulting in a large number of specifications, excessive inventory, and large space occupation.

[0006] 4. Low protection performance during short / open circuit, and poor protection effect for short circuits above 200KA.

[0007] 5. Unable to protect motor circuits up to 40hp.

[0008] Therefore, how to design a high-impulse-resistant fuse structure to solve the above technical defects is a current technical problem that needs to be solved. CONTENT OF THE INVENTION

[0009] The application aims to overcome the above technical problems and provides a high-impulse-resistant fuse structure that can resist instantaneous high pulses and maintain stable operation.

[0010] The application provides a high-impulse-resistant fuse structure, which adopts the following scheme:

[0011] The high-impulse-resistant fuse structure comprises an amine tube body provided with a through accommodating space, an inner cover assembly comprising a first inner cover and a second inner cover, which are respectively sleeved on both ends of the amine tube body and communicate with the accommodating space, a fuse assembly comprising a first fuse and a second fuse located in the accommodating space, the first fuse is provided in two, respectively connected to both ends of the second fuse, and the two first fuses are exposed and welded to the inner cover assembly, and a carrier located in the accommodating space for fixing the fuse assembly, wherein the two first fuses are respectively wound around both ends of the carrier.

[0012] By adopting the technical scheme, the fuse structure can effectively improve the anti-pulse capability. Specifically, the design that two first fuses are respectively connected at two ends of the second fuse can enhance the bearing capacity of the fuse to the large current impact. Meanwhile, the two first fuses are exposed and welded to the inner cover assembly, which simplifies the assembly process and improves the electrical connection reliability. In addition, the fuses are fixed by the carrier, and the two first fuses are respectively wound at two ends of the carrier, which not only ensures the position stability of the fuses, but also further improves the firmness and durability of the overall structure.

[0013] Optionally, the outer cover assembly includes a first outer cover and a second outer cover, the first outer cover is sequentially sleeved on the first inner cover and the amine tube body, and the second outer cover is sequentially sleeved on the second inner cover and the amine tube body.

[0014] By adopting the technical scheme, the outer cover assembly is added to effectively improve the overall protection performance of the fuse. Specifically, the first outer cover and the second outer cover are respectively sleeved outside the inner cover assembly and the amine tube body to form a double protection structure, thereby enhancing the ability of the fuse to resist external mechanical impact, improving the sealing performance, preventing dust and moisture from entering the internal components, and prolonging the service life of the fuse.

[0015] Optionally, the first outer cover is a stepped cap structure, and the second outer cover is a flat cap structure.

[0016] By adopting the technical scheme, the design of the outer cover assembly in the fuse structure makes the first outer cover and the second outer cover have clear shape characteristics. Specifically, the first outer cover adopts a stepped cap structure, which can provide better positioning and assembly stability, and is convenient for correct installation with other components; the second outer cover adopts a flat cap structure, which simplifies the overall appearance design while ensuring the sealing performance and protection performance, which helps to reduce costs and improve production efficiency. The combination of the two outer cover shapes further improves the overall reliability and practicality of the fuse.

[0017] Optionally, the insulating assembly includes a first insulating gasket and a second insulating gasket, the first insulating gasket is located between the first outer cover and the first inner cover, and the second insulating gasket is located between the second outer cover and the second inner cover.

[0018] By adopting the technical scheme, the insulating assembly is added to the high anti-pulse fuse structure, including the first insulating gasket between the first outer cover and the first inner cover and the second insulating gasket between the second outer cover and the second inner cover. This design can effectively improve the overall insulation performance of the fuse, reduce the influence of external environmental factors on the internal circuit, and improve the safety and stability of the product. At the same time, this layout does not increase the space occupation, which is conducive to maintaining the miniaturization design of the fuse.

[0019] Optionally, the overload element is arranged on the carrier, and a through hole is arranged on the overload element for the second fuse to pass through.

[0020] By adopting the above technical scheme, the overload element is added to the structure of the fuse, and arranged on the carrier, and a through hole is arranged on the overload element for the second fuse to pass through. This design can effectively improve the ability of the fuse to resist overload current, and quickly cut off the circuit in the case of abnormally large current, thereby protecting the circuit system from damage. In addition, this design makes the overload protection function more accurate and reliable, further improving the safety performance of the entire fuse.

[0021] Optionally, when the conduction current is 0.1-5A, the first fuse is made of nickel-iron alloy wire; and when the conduction current I>5A, the first fuse is made of copper alloy wire.

[0022] By adopting the above technical scheme, the fuse structure can select a first fuse with appropriate material according to different conduction current ranges, thereby improving the applicability and reliability of the product. Specifically, when the conduction current is 0.1-5A, a nickel-iron alloy wire is selected as the first fuse, which has good stability and pulse resistance in this low current range; and when the conduction current I>5A, a copper alloy wire is selected as the first fuse, which has better conductivity and heat resistance at higher currents, effectively avoiding abnormal damage or failure of the fuse due to excessive current. This design enables the fuse to maintain excellent protection function under different working conditions, while prolonging the service life.

[0023] Optionally, the second fuse is made of silver alloy material, and the length is 7mm; when the conduction current I≤2A, the diameter of the second fuse (32) is ≤0.1mm; when the conduction current is 2A<I≤4A, the diameter of the second fuse (32) is 0.1-0.15mm; when the conduction current is 4A<I≤8A, the diameter of the second fuse (32) is 0.15-0.27mm; when the conduction current is 8A<I≤12A, the diameter of the second fuse (32) is 0.27-0.35mm; and when the conduction current I≥12A, the diameter of the second fuse (32) is 0.35-0.8mm.

[0024] By adopting the technical scheme, the diameter of the second fuse can be accurately adjusted according to different conduction currents, so that the performance of the fuse under different current loads is optimized. Specifically, the second fuse is made of silver alloy material and has a length of 7 mm, which can improve the high-temperature resistance while ensuring the electrical conductivity, thereby enhancing the overall reliability of the fuse. When the conduction current I≤2A, the diameter of the second fuse is controlled within the range of ≤0.1 mm, which can effectively reduce the heat accumulation under low current conditions and avoid unnecessary delay of the fuse. When the conduction current is 2A<I≤4A, 4A<I≤8A, 8A<I≤12A, and I≥12A, the second fuse is configured with different diameters, which can meet the needs of different power equipment while reducing the damage of circuit overcurrent.

[0025] Optionally, the carrier is a glass fiber tube.

[0026] By adopting the technical scheme, the glass fiber tube is used as the carrier, which can effectively improve the overall mechanical strength and heat resistance of the fuse. The glass fiber tube has excellent insulation and high-temperature stability, and is not easy to deform or damage under high current impact, thereby ensuring the position stability of the fuse assembly and improving the working reliability of the fuse. At the same time, the low hygroscopicity of the glass fiber material also enables the fuse to maintain good electrical performance in a humid environment.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By arranging two first fuses at the two ends of the second fuse and exposing and welding them to the inner cover assembly, the anti-pulse ability and current limiting performance of the fuse are effectively improved, which can adapt to high-frequency starting scenes and reduce the phenomenon of abnormal fusing caused by frequent starting;

[0029] 2. The carrier is used to fix the fuse assembly and wind the two first fuses at its two ends, which ensures the reasonable and stable layout of the fuses and improves the overall reliability and the ability to withstand high current impact of the product, thereby expanding the application scenarios and reducing the inventory pressure;

[0030] 3. The fuse structure can quickly respond to short circuit or overload conditions, especially for short circuit currents higher than 200KA and motor circuits up to 40hp, providing better protection effect, significantly enhancing the safety and stability during short / short circuit. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The high anti-pulse type fuse structure disclosed in the embodiments of the present application is a three-dimensional structure schematic diagram;

[0032] Figure 2 The high anti-pulse type fuse structure disclosed in the embodiments of the present application is a schematic diagram of part of the exploded structure.

[0033] Figure 3 A schematic view of a cross-sectional structure of a high-impulse-resistant fuse structure disclosed in the embodiments of the present application.

[0034] Explanation of reference numerals:

[0035] 10, amine tube body; 11, accommodation space; 20, inner cover assembly; 21, first inner cover; 22, second inner cover; 30, fuse assembly; 31, first fuse; 32, second fuse; 40, carrier; 50, outer cover assembly; 51, first outer cover; 52, second outer cover; 60, insulation assembly; 61, first insulation gasket; 62, second insulation gasket; 70, overload element. DETAILED DESCRIPTION

[0036] The terms used in the following embodiments of the present application are only for the purpose of describing the specific embodiments and are not intended to be limiting of the present application. As used in the specification and the appended claims of the present application, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0037] Hereinafter, the terms "first" and "second" are used only for the purpose of description and should not be understood as implying or suggesting relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0038] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0039] Referring to Figure 1 and Figure 2 The high-impulse-resistant fuse structure disclosed in the embodiments of the present application includes an amine tube body 10, an inner cover assembly 20, a fuse assembly 30, and a carrier 40.

[0040] The amine tube body 10 is a melamine tube, and is provided with a through accommodating space 11 for the fuse assembly 30 to pass through. The inner cover assembly 20 includes a first inner cover 21 and a second inner cover 22, which are respectively sleeved on two ends of the amine tube body 10 and are in communication with the accommodating space 11, and are used for welding and fixing two ends of the fuse assembly 30. The fuse assembly 30 includes a first fuse 31 and a second fuse 32 located in the accommodating space 11, and two first fuses 31 are respectively connected to two ends of the second fuse 32 and are exposed and welded on the inner cover assembly 20, that is, the first inner cover 21 and the second inner cover 22. The carrier 40 is located in the accommodating space 11 and is used for fixing the fuse assembly 30, so that the two first fuses 31 can be uniformly wound at the end region of the carrier 40, thereby forming a stable electrical path.

[0041] Specifically, the amine tube body 10 adopts a melamine tube with good insulation properties and mechanical strength. The first inner cover 21 and the second inner cover 22 are both made of copper material with high electrical conductivity, and they are respectively equipped with threaded interfaces or other forms of buckles to assemble with the amine tube body 10, which is not limited herein.

[0042] Here, it is worth mentioning that the first fuse 31 selects a nickel-iron alloy wire or a copper alloy wire. When the conduction current is 0.1-5A, the first fuse 31 adopts a nickel-iron alloy wire, which has good stability and pulse resistance in a low current range. When the conduction current I>5A, the first fuse 31 adopts a copper alloy wire, which has better electrical conductivity and heat resistance at a higher current, effectively avoiding the problem of abnormal damage or failure of the first fuse 31 caused by excessive current.

[0043] The second fuse 32 is made of silver alloy material, and the length is set to 7mm. When the conduction current I≤2A, the wire diameter of the second fuse 32 is ≤0.1mm. When the conduction current is 2A

[0044] In this way, the fuse structure can select the first fuse 31 and the second fuse 32 made of appropriate materials to manufacture the fuse according to different conduction current ranges, so as to improve the applicability and reliability of the product.

[0045] Referring to Figure 2 and Figure 3The carrier 40 is made of a glass fiber tube to play a supporting role for the fuse assembly 30, which has stronger resistance to extreme conditions than traditional plastic products, such as not easy to deform and crack in high-temperature environment.

[0046] Further, referring to Figure 1 and Figure 2 The fuse structure further comprises an outer cover assembly 50 for effectively improving the overall protection performance of the fuse.

[0047] The outer cover assembly 50 comprises a first outer cover 51 and a second outer cover 52, which are respectively sleeved on the inner cover assembly 20 and the outside of the amine tube body 10, so that the first outer cover 51 is sleeved on the first inner cover 21 and the amine tube body 10 in turn, and the second outer cover 52 is sleeved on the second inner cover 22 and the amine tube body 10 in turn. In this way, a double protection structure is formed to enhance the ability of the fuse to resist external mechanical impact, improve the sealing performance, prevent dust and moisture from entering the internal components, and prolong the service life of the fuse.

[0048] Specifically, the first outer cover 51 is a stepped cap structure, and the second outer cover 52 is a flat cap structure, so that the outer cover assembly 50 has clear shape characteristics. Specifically, the first outer cover 51 adopts a stepped cap form, which can provide better positioning and assembly stability, and is convenient for correct installation with other components; the second outer cover 52 adopts a flat cap form, which simplifies the overall appearance design while ensuring the sealing performance and protection performance, helps to reduce costs and improve production efficiency.

[0049] Further, referring to Figure 2 and Figure 3 The fuse structure further comprises an insulation assembly 60, which comprises a first insulation gasket 61 and a second insulation gasket 62. The first insulation gasket 61 is located between the first outer cover 51 and the first inner cover 21, and the second insulation gasket 62 is located between the second outer cover 52 and the second inner cover 22.

[0050] The first insulation gasket 61 and the second insulation gasket 62 are both made of mica gaskets, and both cover two exposed welding positions of the first fuse 31 to effectively isolate the conductive part at both ends of the amine tube body 10, prevent current short circuit or leakage in the circuit, and the mica gasket has high heat resistance and can work stably in high-temperature environment, which is conducive to improving the reliability of the fuse.

[0051] Further, referring to Figure 2 and Figure 3 The fuse structure further comprises an overload element 70 located on the carrier 40, and a through hole is provided on the overload element 70, and the second fuse 32 is arranged on the carrier 40 through the through hole.

[0052] The second fuse 32 is arranged on the overload element 70, and the two ends of the second fuse 32 are connected with the two first fuses 31 and are wound on the carrier 40, which can improve the ability of the fuse to resist overload current, and rapidly cut off the circuit in the case of an abnormal large current, thereby protecting the circuit system from damage.

[0053] In summary, the high anti-pulse fuse structure disclosed by the embodiments of the present application can significantly improve the current limiting ability of the fuse, and reduce the abnormal fusing phenomenon caused by high-frequency starting, by the special design of the fuse assembly 30, i.e. the two first fuses 31 are respectively connected at the two ends of the second fuse 32 and are exposedly welded to the inner cover assembly 20. The carrier 40 is made of glass fiber pipe material, and the two first fuses 31 are orderly wound at the two ends thereof, which ensures the stability and heat dissipation performance of the fuse assembly 30, greatly improves the resistance of the product to high current impact, and thus optimizes the overall protection performance. The introduction of the overload element 70 in cooperation with the first fuse 31 made of a specific material enables the fuse to maintain high-efficiency and stable protection when facing a short-circuit current higher than 200KA or a motor circuit as high as 40hp, greatly widening the application range.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-impulse-resistant fuse structure, characterized by The application relates to an amine tube body (10) provided with a through accommodating space (11); an inner cover assembly (20) comprising a first inner cover (21) and a second inner cover (22) which are respectively sleeved on two ends of the amine tube body (10) and are through the accommodating space (11); a fuse assembly (30) comprising a first fuse (31) and a second fuse (32) which are located in the accommodating space (11), the first fuse (31) is provided as two and is connected at two ends of the second fuse (32), and the two first fuses (31) are exposed and welded on the inner cover assembly (20); and a carrier (40) located in the accommodating space (11) and used for fixing the fuse assembly (30), wherein the two first fuses are respectively wound at two ends of the carrier (40). Further comprising an outer cover assembly (50) comprising a first outer cover (51) and a second outer cover (52), the first outer cover (51) is sequentially sleeved on the first inner cover (21) and the amine tube body (10), and the second outer cover (52) is sequentially sleeved on the second inner cover (22) and the amine tube body (10). The first outer cover (51) is a stepped cap structure, and the second outer cover (52) is a flat cap structure. Further comprising an insulation assembly (60) comprising a first insulation gasket (61) and a second insulation gasket (62), the first insulation gasket (61) is located between the first outer cover (51) and the first inner cover (21), and the second insulation gasket (62) is located between the second outer cover (52) and the second inner cover (22). Further comprising an overload element (70) located on the carrier (40) and provided with a through hole for the second fuse (32) to pass through.

2. The fuse structure of claim 1, wherein When the conduction current is 0.1-5A, the first fuse (31) adopts a nickel-iron alloy wire; when the conduction current I>5A, the first fuse (31) adopts a copper alloy wire. The second fuse (32) adopts a silver alloy material and has a length of 7mm; 3. The fuse structure of claim 2, wherein, When the conduction current I is less than or equal to 2A, the wire diameter of the second fuse (32) is less than or equal to 0.1mm; 4. The fuse structure of claim 2, wherein When the conduction current is 2A When the conduction current is 4A 5. The fuse structure of claim 1, wherein When the conduction current is 8A When the conduction current is 8A 6. The fuse structure of claim 1, wherein When the conduction current is 8A 7. The fuse structure of claim 1, wherein When the conduction current is 8A The carrier (40) is a glass fiber tube. ​ ​ ​ ​ 8. The fuse structure of claim 1, wherein ​

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