CN213340268U

CN213340268U - Fuse wire sectional type fuse

Info

Publication number: CN213340268U
Application number: CN202022758572.XU
Authority: CN
Inventors: 陈聪莉; 赵希华; 袁明
Original assignee: Xi'an Suyuan Electric Power Equipment Co ltd
Current assignee: Xi'an Suyuan Electric Power Equipment Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-06-01
Anticipated expiration: 2030-11-25

Abstract

The utility model belongs to the technical field of the fuse, a fuse wire sectional type fuse is related to, pack including tube, fuse wire, end cap, arc extinguishing, fuse wire, end cap are the conductor, the tube is the insulator, the fuse wire is located the tube inner chamber and both ends are connected the end cap at tube both ends respectively, the fuse wire divide into first fuse wire, second fuse wire, third fuse wire in proper order along the flow direction of electric current, the diameter of second fuse wire is less than the diameter of first fuse wire, third fuse wire, the melting point of second fuse wire is less than the melting point of first fuse wire, third fuse wire; the utility model discloses use the melt section of different diameter thickness different materials, it is extravagant to reduce the fuse-element under the prerequisite of guaranteeing the fuse-element performance, reduction in production cost.

Description

Fuse wire sectional type fuse

Technical Field

The utility model belongs to the fuse field relates to a fuse wire sectional type 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 end caps at two ends are connected by silver melts with the same diameter, in order to ensure that the temperature rise of the fuse meets the standard requirement, the sectional area of a fuse wire is often larger, the fuse wire is difficult to fuse when passing through overload current in use, and the melt cost is high due to the high silver cost. How to reduce the melt processing manufacturing cost while ensuring the excellent performance of the fuse is always a problem.

Disclosure of Invention

The utility model provides a scheme of this technical problem provides a fuse sectional type fuse, uses the fuse section of the different materials of different diameters thickness, and it is extravagant to reduce the fuse under the prerequisite of guaranteeing the fuse performance, reduction in production cost.

The utility model provides a technical scheme that technical problem took is: a fuse sectional type fuse comprises a tube shell 1, a fuse wire 2, end caps 3 and arc extinguishing fillers 4, wherein the fuse wire 2 and the end caps 3 are conductors, the tube shell 1 is an insulator, the fuse wire 2 is positioned in an inner cavity of the tube shell 1, two ends of the fuse wire 2 are respectively connected with the end caps 3 at two ends of the tube shell 1, the fuse wire 2 is sequentially divided into a first fuse wire 21, a second fuse wire 22 and a third fuse wire 23 along the flowing direction of current, the diameter of the second fuse wire 22 is smaller than that of the first fuse wire 21 and that of the third fuse wire 23, and the melting point of the second fuse wire 22 is lower than that of the first fuse wire.

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

Preferably, the fuse 2 is helical in its portion located inside the envelope 1.

Preferably, the outer surface of the fuse wire 2 is provided with a gas generating material 5.

Preferably, the end face of the end cap 3 is provided with a through hole 6 coaxial with the end cap 3, an embedded cap 7 is arranged in the through hole 6, a filling hole 8 is arranged on the embedded cap 7, and a sealant 9 is arranged in the filling hole 8.

Preferably, the end cap 3 is made of aluminum, and the embedded cap 7 is made of copper.

Preferably, the embedded caps 7 are welded to both ends of the fuse 2.

The utility model has the advantages that:

1. the utility model discloses a with the second fuse setting in the middle than the first fuse at both ends, the cross-section of third fuse is little, the melting point is low, and middle second fuse adopts the silver-colored silk, remains the good fusing performance of silver, the first fuse at both ends, third fuse adopt with copper wire or the nickel silk that the silver-colored performance is close, have reduced the use amount of silver-colored silk, manufacturing cost is lower, and mechanical properties is better, consequently the utility model discloses under the prerequisite of guaranteeing the fuse performance, the manufacturing cost of fuse has been reduced.

2. The utility model makes the fuse wire into the spiral spring shape, so that the length of the fuse wire can be made longer and the voltage of the fuse wire can be made higher under the condition of a certain tube shell height; and when the spiral spring-shaped fuse wire is disconnected, the fuse wire rebounds to the two ends, the fracture distance of the fusing part is pulled open, the breaking of the fuse wire is facilitated, and the fusing sensitivity of the fuse wire is improved.

3. The utility model discloses a gas production material that is equipped with on the fuse, 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.

4. The utility model discloses an adopt the outer cap of aluminium system, trompil on the outer cap, downthehole copper of inlaying inlays the cap, and the fuse spot welding is on inlaying the cap, guarantees welding performance and electric conductivity, treats that the arc extinguishing filler is sealed with sealed glue after accomplishing, when guaranteeing the leakproofness, the material cost of outer cap is lower, therefore the cost of fuse is lower.

Drawings

FIG. 1 is a cross-sectional view of a fuse segmented fuse;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a front view of the fuse.

In the figure: 1. a pipe shell; 2. melting the materials; 3. an end cap; 4. an arc suppressing filler; 5. a gas generating material; 6. a through hole; 7. embedding a cap; 8. filling the hole; 9. sealing glue; 21. a first fuse; 22. a second fuse; 23; and a third fuse.

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 to 3, a fuse segmented fuse includes a tube case 1, a fuse 2, an end cap 3, and an arc extinguishing filler 4, wherein the fuse 2 and the end cap 3 are conductors, the tube case 1 is an insulator, the fuse 2 is located in an inner cavity of the tube case 1, and two ends of the fuse 2 are respectively connected to the end caps 3 at two ends of the tube case 1, the fuse 2 is sequentially divided into a first fuse 21, a second fuse 22, and a third fuse 23 along a current flowing direction, a diameter of the second fuse 22 is smaller than diameters of the first fuse 21 and the third fuse 23, and a melting point of the second fuse 22 is lower than melting points of the first fuse 21 and the third fuse 23. Each section of the fuse wire 2 is connected in modes of soldering, lap winding, conductive adhesive bonding and the like; the section of the intermediate fuse 22 is small, the current density is high, the fuse is favorable for being cut off, the problem that the fuse is difficult to cut off due to small-multiple overload is solved, and the protection range of the fuse is wider and safer; the cross sections of the fuse wires at the two ends are larger, and the resistors are compensated, so that the overall resistance of the fuse is smaller, and the temperature rise is lower.

Further, the material of the first fuse 21 includes silver, and the material of the second fuse 22 and the third fuse 23 includes copper and nickel. The first fuse wire 22 in the middle is made of silver, the excellent fusing performance of the silver is reserved, copper wires or nickel wires with the performance similar to that of the silver are arranged at the two ends, the manufacturing cost is lower, the mechanical performance is better, the production cost is reduced, and meanwhile, the performance of the fuse is reserved.

Further, the fuse 2 is formed in a spiral shape in the portion inside the case 1. The fuse wire 2 is in a spiral spring type, so that under the condition that the height of the tube shell 1 is fixed, the length of the fuse wire 2 can be longer, and the voltage of the fuse wire is higher; when the fuse 2 of heliciform spring type made the fuse disconnection, fuse 2 rebounded to both ends, drew open fusing department fracture distance, more was favorable to the fuse to divide absolutely.

Furthermore, the fuse 2 is provided with gas generating material 5 on the outer surface of the inner part of the tube shell 1. The round gas generating material 5 is dotted on the fuse wire 2, and at the moment of fusing of the fuse, the gas generating material 5 is decomposed to generate gas which is helpful for arc extinction, so that the fuse is quickly disconnected.

Furthermore, be equipped with on the terminal surface of end cap 3 with the coaxial through-hole 6 of end cap 3, be equipped with in the through-hole 6 and inlay cap 7, be equipped with filling hole 8 on inlaying the cap 7, be equipped with sealed glue 9 in the filling hole 8.

Furthermore, the material of the end cap 3 is aluminum, and the material of the embedded cap 7 is copper. Adopt aluminium system end cap 3, the cost is lower, and trompil on the end cap 3 inlays copper in the hole and inlays cap 7, under the prerequisite of guaranteeing the conductivity, further reduce cost.

Further, both ends of the fuse 2 are respectively soldered with the embedded caps 7.

Examples

In the using process, when the passing current is larger than the design current of the fuse, the three fuse wires simultaneously generate heat in the process of passing the current through the fuse wire 2, the diameter of the middle second fuse wire 22 is small, so the heat generated on the second fuse wire 22 due to current overload is large, and the melting point of the second fuse wire 22 is low, so the middle second fuse wire 22 is firstly subjected to thermal melting disconnection, the fuse wire 2 is spiral, the fuse wire 2 contracts towards two ends after disconnection, so that quick disconnection is realized, meanwhile, the gas generating material 5 is decomposed when the fuse wire 2 is fused, gas which is beneficial to arc extinction is generated, and the fusing performance of the fuse is enhanced.

To sum up, the utility model provides a fuse wire sectional type fuse uses the fuse-element section of the different materials of different diameters thickness, 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

1. The fuse wire sectional type fuse comprises a tube shell (1), a fuse wire (2), an end cap (3) and arc extinguishing filler (4), wherein the fuse wire (2) and the end cap (3) are conductors, the tube shell (1) is an insulator, the fuse wire (2) is positioned in an inner cavity of the tube shell (1), two ends of the fuse wire (2) are respectively connected with the end cap (3) at two ends of the tube shell (1), the fuse wire sectional type fuse is characterized in that the fuse wire (2) is sequentially divided into a first fuse wire (21), a second fuse wire (22) and a third fuse wire (23) along the flowing direction of current, the diameter of the second fuse wire (22) is smaller than that of the first fuse wire (21) and that of the third fuse wire (23), and the melting point of the second fuse wire (22) is lower than that of the.

2. A fuse-segment fuse according to claim 1, characterized in that the material of the first fuse wire (21) comprises silver and the material of the second (22) and third (23) fuse wires comprises copper and nickel.

3. A fuse segmented fuse according to claim 1, characterised in that the part of the fuse wire (2) inside the housing (1) is helical.

4. A fuse-segmented fuse according to claim 1, characterized in that the fuse wire (2) is provided with gas generating material (5) on its outer surface.

5. A fuse segmented fuse according to claim 1, characterized in that the end face of the end cap (3) is provided with a through hole (6) coaxial with the end cap (3), an embedded cap (7) is provided in the through hole (6), a filling hole (8) is provided in the embedded cap (7), and a sealant (9) is provided in the filling hole (8).

6. A fuse-link segmented fuse according to claim 5 characterized in that the material of the end cap (3) is aluminium and the material of the embedding cap (7) is copper.

7. A fuse segmented fuse according to claim 6 characterized in that the fuse wire (2) is welded at both ends with embedded caps (7) respectively.