CN214068678U - Multi-section fuse-element fuse - Google Patents

Abstract

The utility model belongs to the technical field of the fuse, a multistage formula fuse-element fuse is related to, including the tube, the fuse-element, the end cap, the arc extinguishing packs, the fuse-element, the end cap is the conductor, the tube is the insulator, the fuse-element divide into first fuse-element, second fuse-element, third fuse-element in proper order along the flow direction of electric current, the thickness of second fuse-element is less than the thickness of first fuse-element, third fuse-element, the melting point of second fuse-element is less than the melting point of first fuse-element, third fuse-element, the end cap is cylindrical and one end is provided with the feeler tool end, be equipped with two cylinder terminal surfaces that fuse-element clearing hole intercommunication end cap on the end cap, the both ends of tube are buckled respectively and are had the end cap, the fuse-element is located the tube and both ends electrically conductive connection fuse-element clearing hole; the utility model discloses use the fuse-element of the different materials of different thickness to splice into the fuse-element, it is extravagant to reduce the fuse-element under the prerequisite of guaranteeing the fuse-element performance, reduction in production cost.

Description

Multi-section fuse-element fuse

Technical Field

The utility model belongs to the fuse field relates to a multistage formula fuse-element fuse.

Background

The fuse is an electric appliance which fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value. The fuse melts the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so as to cut off the circuit; a current protector is made by applying the principle. The fuse is widely applied to high and low voltage distribution systems, control systems and electric equipment, and is one of the most commonly applied protection devices as a short circuit and overcurrent protector.

The fuse basically has a structure that end caps are sleeved at two ends of a tube shell, a fuse body is connected between the end caps, and fuse filler is filled between the fuse body and the inner wall of the tube shell. In the existing fuse processing process, the silver melt is connected with end caps at two ends, and when the silver melt is used, the silver melt is heated and fused when the current is too large. However, when the fuse is overloaded, the fuse is usually generated only locally, and the rest of the melt in the tube shell is intact, which causes great waste and high melt cost. It has been a problem to reduce the waste of melt in the enclosure while reducing the cost of melt processing manufacturing.

Disclosure of Invention

The utility model provides a scheme of this technical problem provides a multistage formula fuse-element fuse, uses the fuse-element of the different materials of different thickness to splice into the fuse area, and it is extravagant to reduce the fuse-element under the prerequisite of guaranteeing the fuse performance, reduction in production cost.

The utility model provides a technical scheme that technical problem took is: the utility model provides a multistage formula fuse-element fuse, including tube 1, fuse-element 2, end cap 3, the arc extinguishing packs 4, fuse-element 2, end cap 3 is the conductor, tube 1 is the insulator, fuse-element 2 divide into first fuse-element 21 along the flow direction of electric current in proper order, second fuse-element 22, third fuse-element 23, the thickness of second fuse-element 22 is less than first fuse-element 21, the thickness of third fuse-element 23, the melting point of second fuse-element 22 is less than first fuse-element 21, the melting point of third fuse-element 23, end cap 3 is cylindrically and one end is provided with touches sword end 5, be equipped with two cylinder terminal surfaces of 6 intercommunication end caps 3 of fuse-element clearing hole on end cap 3, the both ends of tube 1 lock respectively has end cap 3, fuse-element 2 is located tube 1 and both ends electrically conductive connection fuse-element clearing hole 6.

Preferably, the material of the first fuse link 21 includes silver, and the material of the second fuse link 22 and the third fuse link 23 includes copper.

Preferably, the melt passage holes 6 are strip-shaped holes.

Preferably, the melt piece 2 is provided with a narrow diameter 7, and the narrow diameter 7 comprises a single narrow diameter and a plurality of narrow diameters.

Preferably, the narrow-diameter holes on the narrow diameter 7 comprise round holes, elliptical holes, square holes, rhombic holes and elliptical holes.

Preferably, the arc-extinguishing filler 4 comprises quartz sand.

Preferably, the insulator material of the envelope 1 comprises ceramic, epoxy, melamine, glass, plastic, rubber.

Preferably, the contact knife end 5 is provided with an installation long hole 8.

Preferably, the outer surface of the second fuse piece 22 is coated with a gas generating material.

Preferably, the electrically conductive connection of the melt fuse 2 to the melt passage opening 6 comprises soldering.

The utility model has the advantages that:

1. the utility model discloses a with the thickness of the first fuse piece, the third fuse piece at both ends that the second fuse piece in the middle set up little, the melting point is low, and middle second fuse piece adopts silver to make, keeps the good fusing performance of silver, the first fuse piece, the third fuse piece at both ends adopt to become with the copper that silver performance is close, when guaranteeing the fuse performance, manufacturing cost is lower, and mechanical properties is better, consequently the utility model discloses under the prerequisite of guaranteeing the fuse performance, manufacturing cost is lower.

2. The utility model discloses a paint gas production material at the surface of second fuse piece, in the twinkling of an eye at fuse fusing, gas production material decomposes, produces the gas that helps the arc extinguishing, makes the fuse break off rapidly, strengthens the fusing security of fuse.

3. The utility model discloses a set up the fuse-element clearing hole of bar on the end cap, be connected to the fuse-element clearing hole through welded mode is electrically conductive with the fuse-element, and swift convenient easily processing has more guaranteed under the prerequisite of fuse conductivity, has simplified processing technology, has reduced the processing cost.

4. The utility model discloses a set up the fuse link into multiple different throat mode, if single throat, many throats, satisfy different fuse fusing current and voltage's demand, solved the problem that the fuse small multiple transships and is difficult to cut off, have more extensive suitability.

Drawings

FIG. 1 is a cross-sectional view of a multi-section fuse link;

FIG. 2 is a side partial sectional view A-A of FIG. 1;

FIG. 3 is a top view of the end cap;

FIG. 4 is a schematic view of a single throat and multiple throats.

In the figure: 1. a pipe shell; 2. fusing the sheets; 3. an end cap; 4. an arc suppressing filler; 5. contacting the end of the cutter; 6. the melt passes through the holes; 7. a narrow diameter; 8. installing a long hole; 21. a first fuse sheet; 22. a second fuse piece; 23. and a third fuse piece.

Detailed Description

The related art in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is to be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, a multistage formula fuse-element fuse, including tube 1, fuse link 2, end cap 3, arc extinguishing filler 4, fuse link 2, end cap 3 is the conductor, tube 1 is the insulator, fuse link 2 divide into first fuse link 21 in proper order along the flow direction of electric current, second fuse link 22, third fuse link 23, the thickness of second fuse link 22 is less than first fuse link 21, the thickness of third fuse link 23, the melting point of second fuse link 22 is less than first fuse link 21, the melting point of third fuse link 23, end cap 3 is cylindrical and one end is provided with touches sword end 5, be equipped with two cylinder terminal surfaces that fuse-element clearing hole 6 communicates end cap 3 on the end cap 3, the lock has end cap 3 respectively at the both ends of tube 1, fuse link 2 is located tube 1 and both ends electrically conductive connection fuse-element clearing hole 6. Each fuse link 2 is connected through modes such as laser welding, spot welding, conducting resin connection, and middle second fuse link 22 thickness is thin, and current density is high, is favorable to the fuse to cut off, has solved the problem that the fuse small multiple transships and is difficult to cut off, and the fuse protection zone who makes is wider, safer, and the first fuse link 21 of both ends fuse-element, the 23 thickness of third fuse link are thicker, and compensation resistance makes fuse bulk resistance littleer, and the temperature rise is lower.

Further, the material of the first fuse link 21 includes silver, and the material of the second fuse link 22 and the third fuse link 23 includes copper. The middle second fuse piece 22 adopts silver melt, the excellent performance of the silver melt is reserved, and the second fuse piece 22 and the third fuse piece 23 at the two ends adopt copper melt with the performance similar to that of the silver melt, so that the manufacturing cost is lower.

Further, the melt passing holes 6 are bar-shaped holes.

Furthermore, the fuse piece 2 is provided with a narrow diameter 7, and the narrow diameter 7 comprises a single narrow diameter and a plurality of narrow diameters. Increasing the throat diameter increases the fusing current.

Furthermore, the narrow-diameter holes on the narrow diameter 7 comprise round holes, elliptical holes, square holes, rhombic holes and elliptical holes.

Further, the arc extinguishing filler 4 includes quartz sand.

Further, the insulator material of the envelope 1 comprises ceramic, epoxy, melamine, glass, plastic, rubber.

Furthermore, an installation long hole 8 is formed in the end 5 of the contact knife.

Further, the outer surface of the second fuse block 22 is coated with a gas generating material.

Further, the electrically conductive connection of the fuse link 2 to the melt passage opening 6 comprises soldering.

Examples

In the using process, when the passing current is larger than the design current of the fuse, the three fuse pieces simultaneously generate heat when the current flows through the fuse, because the thickness of the middle second fuse piece 22 is smaller than the thicknesses of the first fuse piece 21 and the third fuse piece 23, the resistance of the second fuse piece 22 is larger than the resistances of the first fuse piece 21 and the third fuse piece 23, the heat productivity generated by current overload is large, and because the melting point of the second fuse piece 22 is low, the middle second fuse piece 22 is firstly subjected to hot melting disconnection, and because the outer surface of the second fuse piece 22 is coated with the gas generating material, the gas generating material is decomposed while fusing, gas beneficial to arc extinction is generated, and the fusing performance of the fuse is enhanced.

To sum up, the utility model provides a multistage formula fuse-element fuse uses the fuse-element of the different materials of different fuse-element thickness to splice into the fuse-element, and it is extravagant to reduce the fuse-element under the prerequisite of guaranteeing the fuse-element performance, reduction in production cost, consequently the utility model discloses possess extensive application prospect.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims (10)

1. A multi-section fuse link fuse comprises a tube shell (1), fuse links (2), an end cap (3) and arc extinguishing filler (4), wherein the fuse links (2) and the end cap (3) are conductors, the tube shell (1) is an insulator, and the fuse link (2) is sequentially divided into a first fuse link (21), a second fuse link (22) and a third fuse link (23) along the flowing direction of current, the thickness of the second fuse link (22) is smaller than that of the first fuse link (21) and that of the third fuse link (23), the melting point of the second fuse link (22) is lower than that of the first fuse link (21) and that of the third fuse link (23), the end cap (3) is cylindrical, one end of the end cap is provided with a contact knife end (5), the end cap (3) is provided with a fuse link (6) through two cylindrical end faces of the end cap (3), and the end caps (3) are respectively buckled at two ends of the tube shell (1), the fuse piece (2) is positioned in the tube shell (1) and two ends of the fuse piece are electrically connected with the fuse passing holes (6).

2. A multi-section fuse as claimed in claim 1, wherein the material of the first fuse link (21) comprises silver and the material of the second and third fuse links (22, 23) comprises copper.

3. A multi-sectional fuse element according to claim 1 wherein the melt passing apertures (6) are bar apertures.

4. A multi-sectional fuse as claimed in claim 1, wherein the fuse element (2) is provided with a throat (7), the throat (7) comprising a single throat and a plurality of throats.

5. A multi-segment fuse as claimed in claim 4 wherein the throat holes of the throat (7) comprise round, elliptical, square, diamond, elliptical holes.

6. A multi-sectional fuse according to claim 1, wherein the arc suppressing filler (4) comprises silica sand.

7. A multi-section fuse as claimed in claim 1, wherein the insulator material of the housing (1) comprises ceramic, epoxy, melamine, glass, plastic, rubber.

8. A multi-sectional fuse element according to claim 1 wherein the blade end (5) is provided with a mounting slot (8).

9. A multi-section fuse as claimed in claim 1, wherein the outer surface of the second fuse element (22) is coated with a gas generating material.

10. A multi-sectional fuse element according to claim 1 wherein the electrically conductive connection of the fuse element (2) to the melt passing aperture (6) comprises welding.

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