CN214378314U

CN214378314U - Fuse tube body structure capable of improving breaking capacity

Info

Publication number: CN214378314U
Application number: CN202120088284.XU
Authority: CN
Inventors: 叶小坤; 赖文辉; 胡兴华
Original assignee: Hollyland Xiamen Circuit Protection Technology Co ltd
Current assignee: Hollyland Xiamen Circuit Protection Technology Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-10-08
Anticipated expiration: 2031-01-13

Abstract

A fusible body is erected in a fuse tube with two open ends and welded on end caps at two ends of the fuse tube through soldering tin, a plurality of separation sheets capable of separating and blocking a long arc are arranged in a cavity of the fuse tube, each separation sheet extends from the inner wall of the fuse tube to the center to form a distance, the fusible body penetrates through a space formed in the inner end of each separation sheet, and the fusible body is located on the side edge of each separation sheet and forms a space with the inner end of each separation sheet. The utility model discloses can make electric arc extinguish fast to improve the disjunction ability of fuse.

Description

Fuse tube body structure capable of improving breaking capacity

Technical Field

The utility model relates to a circuit protection's technical field specifically is a fuse tube structure who improves breaking capacity with quick arc extinguishing.

Background

The fuse is a circuit protector, and the traditional fuse structure is shown in figure 1, and comprises two end caps 1 ', an insulating tube 2', a melt 3 'and a fuse tube structure consisting of two ends of soldering tin 4'. At the instant of fuse blow, a large amount of high temperature arc is generated inside the fuse, since arc is a gas discharge phenomenon, and the current passes through a momentary spark generated by some insulating medium (e.g., air) and is a self-sustaining gas conduction. Under the effect of electric arc, fuse tube internal pressure can sharply grow, if electric arc can not in time extinguish, the breakdown end cap can appear, the blowout, fuse tube can also appear exploding even, causes damage and loss of property to other electron device in the circuit. Accordingly, there is a need for a fuse that will safely blow in the presence of any unsafe factors in the circuit, including sustained arcing, re-conduction, burning, spattering, and explosion.

In the prior art, arc extinguishing fillers such as quartz sand are basically filled, or the quartz sand is solidified by adopting water glass, or the mechanical strength of a tube body is enhanced, so that the electric arc capacity generated by fusing of a fuse is improved, and the breaking capacity effect is improved. However, due to the size limitation of the small fuse, it is not practical to fill arc extinguishing materials or inject water glass, and with the development of scientific technology, the breaking of the small fuse is higher and higher, the prior art cannot meet the requirements, and a better method needs to be found to realize the high breaking of the small fuse. The scheme is generated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an improve the protective tube structure of disconnected ability, it can make electric arc extinguish fast to improve the disconnected ability of fuse.

In order to achieve the above purpose, the solution of the present invention is:

a fusible body is erected in a fuse tube with two open ends and welded on end caps at two ends of the fuse tube through soldering tin, a plurality of separation sheets capable of separating and blocking a long arc are arranged in a cavity of the fuse tube, each separation sheet extends from the inner wall of the fuse tube to the center to form a distance, the fusible body penetrates through a space formed by the inner ends of the separation sheets, and the fusible body is located on the side edge of the separation sheet and forms a space with the inner end of the separation sheet.

Further, the separator is integrally formed on the inner wall of the fuse tube.

Further, the plurality of spacers are disposed on a fitting that fits within the cavity of the fuse tube.

Furthermore, at least two rows of partition sheet groups are arranged on the inner wall of the fuse tube, a plurality of partition sheets arranged in the longitudinal direction are arranged in each row of partition sheet group and distributed in an equidistant mode or an unequal-distance mode, and the partition sheets in different rows are distributed in a parallel mode or in a staggered mode.

Furthermore, two rows of partition plate groups are arranged in the cavity of the fuse tube, six partition plates are distributed at equal intervals in each partition plate group, every two corresponding partition plates in the two rows of partition plate groups are paired, and the fusible bodies are located in the space between every two partition plates.

Furthermore, the separating sheet is in a shape of a block or a strip.

Furthermore, the separating sheet is in the shape of a block, a strip or a circular ring.

Furthermore, the inner wall of the fuse tube extends towards the center to form a spiral sheet body, blades which are convexly arranged on the inner wall of the fuse tube by the spiral sheet body form a plurality of separation sheets, and a hollow part which can allow the fusible body to pass through the frame is formed in the middle of the spiral sheet body.

Further, the distance formed by extending the separating sheet from the inner wall of the fuse tube to the center is smaller than the inner radius of the fuse tube.

Furthermore, the fuse tube and the separating sheet are made of insulating materials.

After the structure of the oil-gas separator is adopted, the utility model discloses a set up a plurality of spacer modes on the fuse tube inner wall, when the fuse tube meets short-circuit current, can make electric arc get into corresponding spacer slot in, the restriction electric arc passageway lets electric arc force the cooling, reduces the electric ion velocity of motion for electric arc extinguishes fast, thereby has improved the disjunction ability of fuse self.

Drawings

FIG. 1 is a schematic cross-sectional view of a conventional fuse tube structure;

FIG. 2 is a schematic longitudinal sectional view of one embodiment of the present invention;

fig. 3 is a schematic top view of another embodiment of the present invention.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

As shown in fig. 2, the present invention discloses a fuse tube structure for improving breaking capacity, the fuse includes a fuse tube 1, a fusible body 2, two end caps 3 and a solder 4, wherein the fusible body 2 is erected in the fuse tube 1 with two open ends, the end caps 3 are fitted at two ends of the fuse tube 1, and the fusible body 2 can be located between the two end caps 3 of the fuse tube by being welded on the solder 4 in the end caps 3. Because but the fuse-element can produce long electric arc when the fusing, the utility model discloses in, be provided with a plurality of spacers 5 that can cut apart the back and block long electric arc in the cavity of

fuse tube

1, 5 self preservation fuse tubes inner walls of each spacer form one section distance to the center extension, but fuse-element 2 passes the middle part of fuse tube 1, but in the interval that 5 inner of spacer formed was passed to fuse-element 2, spacer 5 is located but 2 sides of fuse-element and is formed with certain interval between the inner of spacer 5, the combination forms the semi-closed space that supplies 2 erects of fusible body between a plurality of spacers 5. The fusible body 2 in the embodiment is vertically arranged in the middle of the fuse tube 1, and the distance formed by extending the separating sheet 5 from the inner wall of the fuse tube 1 to the center is smaller than the inner radius of the fuse tube 1. But through the cavity passageway that forms the fuse-element 2 that can be convenient for to penetrate the frame in the spacer, but be favorable to fuse-element wire and welding operation, the reliability is better, for only carrying out totally enclosed separation on one side of the fuse-element and blocking, the arc extinguishing effect is better. After the electric arc enters the narrow slits of the plurality of separating sheets, the long electric arc can be divided into a plurality of short arcs connected in series, the contact surface of the barrier solid medium formed by the plurality of short arcs and the plurality of separating sheets is larger, the effect of cooling the electric arc can be enhanced, and the electric arc can be rapidly extinguished.

Wherein, the fuse tube 1 and the separating plate 5 are made of insulating materials. The spacers 5 may be integrally formed directly on the inner wall of the fuse tube 1. Of course, it is also possible to provide a plurality of spacers on a fitting (not shown) so that the fitting fits within the cavity of the fuse tube 1. The separating sheet 5 may be in the shape of a block, a strip, or the like, or may be in the shape of a circular ring. The length of the partition plate in the shape of a block or a strip is smaller than the inner radius of the fuse tube 1. In the case of the separator in the form of a circular ring, the width of the circular ring is made smaller than the inner radius of the fuse tube 1, so that a hollow portion through which the fusible body 2 can pass is left in the middle.

For the distribution of the separating sheets, at least two rows of separating sheet groups are arranged on the inner wall of the fuse tube 1, a plurality of separating sheets arranged in the longitudinal direction are arranged in each row of separating sheet groups, the separating sheets in the same row can be distributed at equal intervals or at unequal intervals, and the separating sheets in different rows can be distributed in parallel or in a staggered manner. As shown in fig. 2, two rows of partition plate groups may be disposed in the cavity of the fuse tube 1, the partition plates are in a shape of a block or a strip, six partition plates 5 are disposed in each partition plate group and are distributed at equal intervals, two corresponding partition plates 5 in the two rows of partition plate groups are paired, and the fusible bodies are disposed in the interval between two partition plates. Two rows of the partition plate groups can be oppositely arranged, the partition plates 5 in each row are arranged in parallel, and the partition plates in each row of the partition plate groups and the upper partition plate and the lower partition plate can be in staggered distribution, as shown in fig. 3.

Furthermore, the inner wall of the fuse tube 1 may extend toward the center to form a spiral sheet (not shown), the spiral sheet forms a plurality of separation sheets by the protruding blades on the inner wall of the fuse tube, and a hollow portion for the fusible body 2 to pass through is formed in the middle of the spiral sheet.

After the structure of the oil-gas separator is adopted, the utility model discloses a set up a plurality of spacer modes on the fuse tube inner wall, when the fuse tube meets short-circuit current, can make electric arc get into corresponding spacer slot in, the restriction electric arc passageway lets electric arc force the cooling, reduces the electric ion velocity of motion for electric arc extinguishes fast, thereby has improved the disjunction ability of fuse self. Through the design, the utility model discloses for traditional fuse tube has more the convenience through filling the arc extinguishing material arc extinguishing, reliability and operability, further improves the security performance.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.

Claims

1. The utility model provides an improve fuse body structure of breaking capacity, fusible body erects in the open fuse tube in both ends to weld on the end cap at fuse tube both ends through soldering tin, its characterized in that: a plurality of separating sheets capable of separating and blocking the long arc are arranged in the cavity of the fuse tube, each separating sheet extends from the inner wall of the fuse tube to the center to form a distance, the fusible body penetrates through the space formed in the inner end of each separating sheet, and the fusible body is positioned on the side edge of each separating sheet and forms a space with the inner end of each separating sheet.

2. A fuse tube structure for improving breaking ability according to claim 1, wherein: the separating sheets are integrally formed on the inner wall of the fuse tube.

3. A fuse tube structure for improving breaking ability according to claim 1, wherein: the plurality of separator plates are disposed on a fitting that fits within the cavity of the fuse tube.

4. A fuse tube structure for improving breaking ability according to any one of claims 1 to 3, wherein: at least two rows of partition sheet groups are arranged on the inner wall of the fuse tube, a plurality of partition sheets arranged in the longitudinal direction are arranged in each row of partition sheet group and distributed in an equidistant mode or an unequal-distance mode, and the partition sheets in different rows are distributed in a parallel mode or a staggered mode.

5. A fuse tube structure for improving breaking ability according to claim 4, wherein: two rows of partition plate groups are arranged in the cavity of the fuse tube, six partition plates are distributed at equal intervals in each group of partition plate groups, every two corresponding partition plates in the two rows of partition plate groups are paired, and the fusible bodies are located in the space between every two partition plates.

6. A fuse tube structure for improving breaking ability according to claim 4, wherein: the separating sheet is in the shape of a block or a strip.

7. A fuse tube structure for improving breaking ability according to any one of claims 1 to 3, wherein: the separating sheet is in the shape of a sheet block, a strip or a circular ring sheet.

8. A fuse tube structure for improving breaking ability according to any one of claims 1 to 3, wherein: the fuse tube inner wall extends towards the center to form a spiral sheet body, the spiral sheet body forms a plurality of separation sheets on the blades convexly arranged on the fuse tube inner wall, and a hollow part through which a fusible body can penetrate is formed in the middle of the spiral sheet body.

9. A fuse tube structure for improving breaking ability according to claim 1, wherein: the distance formed by extending the separating sheet from the inner wall of the fuse tube to the center is smaller than the inner radius of the fuse tube.

10. A fuse tube structure for improving breaking ability according to claim 1, wherein: the fuse tube and the separating sheet are made of insulating materials.