Novel high-voltage low-breaking patch fuse

Abstract

The utility model discloses a novel high-voltage low-breaking patch fuse, which comprises a porcelain tube, copper caps, a melt and arc-resistant glue, the copper caps are mounted at two ends of the porcelain tube, the melt penetrates through the interior of the porcelain tube and is welded with the copper caps at the two ends, the arc-resistant glue is arranged at two end points, close to the copper caps, of the melt, the arc-resistant glue covers the inner walls of the copper caps, and the arc-resistant glue covers the inner walls of the copper caps. And the porcelain tube is filled with quartz sand. Through the above mode, the fuse port is provided with the arc-resistant glue and the ceramic retaining wall is arranged around the opening of the port, so that the arc can be effectively prevented from puncturing the copper cap.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a novel high-voltage and low-breaking chip fuse. Background Art

[0002] Existing fuse products such as Figure 1 As shown in the figure, the melt passes through the fuse cap and is directly welded to the copper cap. There is no obstruction at the fuse port. For SMD ceramic fuses, when performing high-breaking test, the internal melt often explodes and spreads to the copper cap end, causing a high-temperature arc to penetrate the copper cap, thereby blowing up the fuse.

[0003] At present, some fuses have arc-extinguishing glue in the middle of the melt, which is aimed at low-voltage products. For fuses with high-breaking tests, the middle melt will be annihilated by the flying ash, and the glue in the middle will also be blown away, and the copper cap end will also be affected.

[0004] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a new type of high-voltage low-breakage chip fuse. Utility Model Content

[0005] The utility model mainly solves the technical problem of providing a novel high-voltage low-breakage chip fuse. The fuse port is provided with arc-blocking glue and the port opening is surrounded by a ceramic retaining wall, which can effectively block the arc from penetrating into the copper cap.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a new type of high-voltage low-breakage chip fuse, which includes a porcelain tube, a copper cap, a melt and an arc-blocking glue. Copper caps are installed at both ends of the porcelain tube. The melt passes through the inside of the porcelain tube and is welded to the copper caps at both ends. Arc-blocking glue is provided at the two ends of the melt near the copper cap. The arc-blocking glue covers the inner wall of the copper cap. Quartz sand is filled inside the porcelain tube.

[0007] Preferably, the arc-blocking glue is made of silica gel, and the arc-extinguishing glue is not limited to silica gel, and any glue with arc-extinguishing and arc-blocking functions is used.

[0008] Preferably, the arc-blocking glue is in a cone shape.

[0009] Preferably, ceramic retaining walls are extended inwardly at both ends of the porcelain tube, and the ceramic retaining walls can effectively block the arc from penetrating into the copper cap. The ceramic retaining wall is provided with a receiving groove for placing arc-blocking glue, and the receiving groove is conical.

[0010] Preferably, a guide hole for passing the melt is provided inside the ceramic retaining wall, and the connection between the guide hole and the receiving groove is rounded to avoid scratching the melt.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The fuse port has arc-blocking glue and the port opening is surrounded by a ceramic retaining wall, which can effectively block the arc from penetrating to the copper cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of existing fuse products.

[0014] Figure 2 This is a schematic diagram of the structure of a new type of high-voltage, low-breakage chip fuse.

[0015] Figure 3 This is a cross-sectional view of a new type of high-voltage, low-breakage chip fuse.

[0016] Figure 4 This is a schematic diagram of the porcelain tube structure of a new type of high-voltage, low-breakage chip fuse.

[0017] Among them, 1. porcelain tube, 10. ceramic retaining wall, 11. containing groove, 12. guide hole, 2. copper cap, 3. melt, 4. arc-blocking glue. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] See also Figures 2 to 4 , the utility model embodiment includes:

[0020] A novel high-voltage low-breakage chip fuse comprises a porcelain tube 1, a copper cap 2, a melt 3 and an arc-blocking glue 4. Copper caps 2 are installed at both ends of the porcelain tube 1. The melt 3 passes through the inside of the porcelain tube 1 and is welded to the copper caps 2 at both ends. Arc-blocking glue 4 is provided at the two ends of the melt 3 close to the copper caps 2. The arc-blocking glue 4 is in a conical shape and covers the inner wall of the copper cap 2. The arc-blocking glue 4 is made of silicone. The arc-extinguishing glue is not limited to silicone, but is a glue with arc-extinguishing and arc-blocking functions. The inside of the porcelain tube 1 is filled with quartz sand.

[0021] Ceramic retaining walls 10 are extended inward at both ends of the porcelain tube 1. The ceramic retaining walls 10 can effectively block the arc from penetrating into the copper cap. A receiving groove 11 is provided on the ceramic retaining wall 10 for placing the arc-blocking glue 4. The receiving groove 11 is conical. A guide hole 12 is provided inside the ceramic retaining wall 10 for inserting the melt 3. The connection between the guide hole 12 and the receiving groove 11 is rounded to avoid scratching the melt 3.

[0022] The utility model discloses a novel high-voltage low-breaking chip fuse. During the high-temperature breaking test, the center of the melt 3 explodes, and the high-temperature arc spreads to both ends to the copper cap 2 ends, which are isolated by arc-blocking glue 4 in a ceramic tube 1 and cannot contact the metal end copper cap 2, thereby extinguishing in the ceramic cavity. The test has proved that the fuse is feasible, which greatly improves the breaking capacity of the fuse.

[0023] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A new type of high voltage low breaking chip fuse, characterized by: The invention comprises a porcelain tube (1), a copper cap (2), a melt (3) and an arc-blocking glue (4), wherein the copper caps (2) are installed at both ends of the porcelain tube (1), the melt (3) passes through the interior of the porcelain tube (1) and is welded to the copper caps (2) at both ends, the melt (3) is provided with arc-blocking glue (4) at both ends close to the copper caps (2), the arc-blocking glue (4) covers the inner wall of the copper caps (2), and the interior of the porcelain tube (1) is filled with quartz sand.

2. A novel high voltage low breaking capacity chip fuse according to claim 1, characterized in that: The arc-blocking glue (4) is made of silica gel.

3. A novel high voltage low breaking capacity chip fuse according to claim 1, characterized in that: The arc-blocking rubber (4) is in a cone shape.

4. A novel high voltage low breaking capacity chip fuse according to claim 1, characterized in that: Ceramic retaining walls (10) are provided inwardly extending from both ends of the porcelain tube (1), and a receiving groove (11) for accommodating arc-blocking glue (4) is provided on the ceramic retaining wall (10), and the receiving groove (11) is in a conical shape.

5. A novel high voltage low breaking capacity chip fuse according to claim 4, characterized in that: The ceramic retaining wall (10) is provided with a guide hole (12) for facilitating the insertion of the melt (3), and the connection between the guide hole (12) and the accommodating groove (11) is rounded.

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