Arc-resistant fuse

Abstract

The utility model discloses an arc-resistant fuse, and belongs to the field of circuit protection devices. The fuse comprises contact knives, melt bodies and a partition plate, the melt bodies and the partition plate are installed between the two contact knives, the partition plate is arranged between the two adjacent melt bodies, and the partition plate is made of a high-temperature-resistant material. According to the utility model, through the partition plate made of a high-temperature-resistant material, the probability of arc crossing between the adjacent melts is reduced, and the problems of explosion and arc spraying of the fuse caused by re-arcing due to arc crossing between the adjacent melts in the high-current fuse are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of circuit protection devices, specifically an arc-resistant fuse. Background Technology

[0002] In the existing technology, a fuse includes a housing, a fusible element, and an arc-extinguishing medium. When multiple fusible elements are provided in the housing, although arc-extinguishing media such as quartz sand are filled between the multiple fusible elements, the quartz sand is an irregular particle, and the gap between the quartz sand filled each time is not fixed. The spacing between the fusible elements of a high-current fuse is small, which makes it easy for arcing to occur between adjacent fusible elements, causing reignition and leading to fuse explosion and arcing. Utility Model Content

[0003] Purpose of the utility model: To provide an arc-resistant fuse that reduces the probability of arcing between adjacent fuse elements by using a partition made of high-temperature resistant material, thus solving the problem of reignition caused by arcing between adjacent fuse elements inside a high-current fuse, leading to fuse explosion and arcing.

[0004] The technical solution of this utility model is as follows: an arc-resistant fuse includes: a contact blade, a fusible element, and a partition plate.

[0005] The melt and the partition are installed between two contact blades, and the partition is disposed between two adjacent melts.

[0006] The partition is made of a high-temperature resistant material.

[0007] In a further embodiment, the high-temperature resistant material includes one of mica paper, polytetrafluoroethylene, and porous vacuum silicon.

[0008] In a further embodiment, the partition is located in the middle of two adjacent melts.

[0009] In a further embodiment, the width of the partition is greater than or equal to the width of the adjacent melt.

[0010] In a further embodiment, the melt and the partition are distributed along the thickness direction of the melt.

[0011] In a further embodiment, the fuse includes at least two partitions, with two adjacent partitions spaced apart by a certain distance, such that a fusible element is disposed between the two adjacent partitions.

[0012] In a further embodiment, six rows of melt and five rows of partitions are provided.

[0013] In a further embodiment, the fuse further includes a housing and an arc-extinguishing medium.

[0014] The contact blade is mounted on the housing, so that the melt and the partition are disposed inside the housing.

[0015] The arc-extinguishing medium is disposed inside the shell, filling the space between the melt and the partition. The combination of the arc-extinguishing medium and the partition further reduces the probability of electric arc.

[0016] In a further embodiment, the contact blade is provided with a mounting groove, and the partition is inserted into the mounting groove, so that the partition can be vertically installed between the two contact blades, thereby improving the stability of the partition.

[0017] The beneficial effects of this utility model are: by setting a solid partition of high temperature resistant material between two adjacent melts, the density difference between different solid partitions is small, which reduces the probability of arcing between adjacent melts and solves the problem of re-arcing caused by arcing between adjacent melts inside a high current fuse, which leads to fuse explosion and arcing. Attached Figure Description

[0018] Figure 1 This is an isometric schematic diagram of the present invention.

[0019] The attached figures are labeled as follows: contact blade 1, melt 2, partition 3, mounting groove 11. Detailed Implementation

[0020] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0021] An arc-resistant fuse is disclosed, which reduces the probability of arcing between adjacent fuse elements by using a partition made of high-temperature resistant material. This solves the problem of re-arcing caused by arcing between adjacent fuse elements inside a high-current fuse, which leads to fuse explosion and arcing.

[0022] like Figure 1 The fuse shown includes: a contact blade 1, a fusible element 2, and a partition 3.

[0023] The melt 2 and the partition 3 are installed between the two contact blades 1, and the partition 3 is disposed between two adjacent melts 2.

[0024] Partition 3 is made of high-temperature resistant material.

[0025] Regarding the partition 3, the high-temperature resistant material includes one of mica paper, polytetrafluoroethylene, and porous vacuum silicon. Mica paper, polytetrafluoroethylene, and porous vacuum silicon are insulating high-temperature resistant materials that can form a physical isolation barrier between the melts 2, blocking the conduction path of the electric arc between adjacent melts and avoiding short circuits or equipment damage caused by arcing.

[0026] The partition 3 is located in the middle of two adjacent melts 2.

[0027] The width of partition 3 is greater than or equal to the width of the adjacent melt 2, such as Figure 1 As shown, when there are two melts 2 in one column of the partition 3 and four melts 2 in another column, the width of the partition 3 is greater than the sum of the width of the four melts 2 and their spacing.

[0028] The melt 2 and the baffle 3 are distributed along the thickness direction of the melt 2.

[0029] The fuse includes at least two partitions 3, with a certain distance between two adjacent partitions 3, and a fusible element 2 is disposed between the two adjacent partitions 3. When multiple rows of partitions 3 and fusible elements 2 are disposed, the partitions 3 and fusible elements 2 can be arranged in a cross manner, wherein there is a gap between the partitions 3 and the fusible elements 2 so that they do not contact each other.

[0030] like Figure 1 The setup shown includes six rows of melt 2 and five rows of partitions 3, as follows: Figure 1 As shown, each column on both sides has two melts 2, and each column in the middle has four melts 2.

[0031] The contact blade 1 is provided with a mounting groove 11, and the partition plate 3 is inserted into the mounting groove 11. The dimensions of the mounting groove 11 and the partition plate 3 are clearance fit to make the partition plate 3 easier to install. At least one contact blade 1 is provided with a mounting groove 11, so that the partition plate 3 can be vertically set between two contact blades 1 and the partition plate 3 is connected to the two contact blades 1. When two contact blades 1 are provided with mounting grooves 11, the two ends of the partition plate 3 are respectively inserted into the two mounting grooves 11, which can make the position of the partition plate 3 more stable.

[0032] In a further embodiment, the fuse further includes a housing and an arc-extinguishing medium.

[0033] The contact blade 1 is installed in the housing, so that the melt 2 and the partition 3 are located inside the housing.

[0034] The arc-extinguishing medium is placed inside the shell, filling the space between the melt 2 and the partition 3. The arc-extinguishing medium includes materials such as quartz sand.

[0035] Working principle: Several solid partitions 3 with small density difference are made of high temperature resistant material. Then, the melt 2 and the partitions 3 are installed between two contact blades 1. Before the contact blades 1 close the end of the shell, the arc extinguishing medium is filled into the shell so that the arc extinguishing medium fills the space between the melt 2 and the partitions 3. Then, the contact blades 1 are installed in the shell, so that the melt 2, the partitions 3 and the arc extinguishing medium are set in the shell to form a fuse. Then, the fuse is installed in the circuit. The insulating high temperature resistant material reduces the probability of arcing between adjacent melts 2.

[0036] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. An arc-resistant fuse, characterized in that, include: Blade, melt, and partition; The melt and the partition are installed between two contact blades, and the partition is disposed between two adjacent melts; The partition is made of a high-temperature resistant material.

2. The arc-resistant fuse according to claim 1, characterized in that, The high-temperature resistant material includes one of mica paper, polytetrafluoroethylene, and porous vacuum silicon.

3. The arc-resistant fuse according to claim 1, characterized in that, The partition is located in the middle of two adjacent melts.

4. The arc-resistant fuse according to claim 1, characterized in that, The width of the partition is greater than or equal to the width of the adjacent melt.

5. The arc-resistant fuse according to claim 1, characterized in that, The melt and the partitions are distributed along the thickness direction of the melt.

6. The arc-resistant fuse according to claim 5, characterized in that, include: At least two partitions, with a certain distance between two adjacent partitions, such that a melt is disposed between the two adjacent partitions.

7. The arc-resistant fuse according to claim 5, characterized in that, It is equipped with six rows of melt and five rows of partitions.

8. The arc-resistant fuse according to claim 1, characterized in that, Also includes: Shell and arc-extinguishing medium; The contact blade is mounted on the housing, so that the melt and the partition are disposed inside the housing; The arc-extinguishing medium is disposed inside the shell, so that the arc-extinguishing medium fills the space between the melt and the partition.

9. The arc-resistant fuse according to claim 1, characterized in that, The contact blade is provided with a mounting groove, and the partition is inserted into the mounting groove.

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