CN217881392U

CN217881392U - High-voltage current-limiting fuse sleeve assembly

Info

Publication number: CN217881392U
Application number: CN202121778510.3U
Authority: CN
Inventors: 彭伯明
Original assignee: Tongxiang Tianze Electrical Co ltd
Current assignee: Tongxiang Tianze Electrical Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-11-22
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a high pressure current-limiting fuse sleeve subassembly, including the fusion tube, set up the core pipe with the fusion tube inner wall laminating in the fusion tube, the fusion tube has first end and second end, and first connecting terminal is connected to first end, and second connecting terminal is connected to the second end, and the axial sets up the fuse in the fusion tube, and the both ends of fuse are pegged graft respectively in first connecting terminal and second connecting terminal, still the spiral sets up the air flue in the fusion tube, sets up a plurality of exhaust holes of arranging along the air flue route is equidistant in the fusion tube, the exhaust hole runs through the fusion tube setting and is linked together with the air flue. Through the structure, the active cooling when the temperature of the fusion tube is too high is realized, and the use safety of the fuse is ensured.

Description

High-voltage current-limiting fuse sleeve assembly

Technical Field

The utility model relates to a high pressure current limiting fuse, especially a high pressure current limiting fuse sleeve subassembly.

Background

The high-voltage current-limiting fuse is suitable for an alternating current 50HZ system with a rated voltage of 3.6-12 KV, can be matched with other electrical appliances (such as switches, contactors and the like) for use, and can be used for protecting overload or short circuit of electric equipment such as motors, transformers, capacitors and the like. When the high-voltage current-limiting fuse is in an overcurrent state, the internal temperature of the fuse can be rapidly increased to hundreds of degrees centigrade, and under the condition, if the fuse cannot be rapidly cooled, the fuse can be broken down by high temperature and even explodes, so that the reliability of a circuit is seriously influenced. The existing fuse does not have a rapid cooling function, and the problems are easily caused.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned not enough, the utility model aims to provide a high pressure current-limiting fuse sleeve subassembly can carry out positive cooling when the fusion tube high temperature to avoid the fusion tube to be punctured by high temperature and appear the booster even.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides a high pressure current-limiting fuse sleeve subassembly, includes the fusion tube, sets up the core pipe of laminating with the fusion tube inner wall in the fusion tube, the fusion tube has first end and second end, and first connecting terminal is connected to first end, and second connecting terminal is connected to the second end, and the axial sets up the fuse in the fusion tube, and the both ends of fuse are pegged graft respectively in first connecting terminal and second connecting terminal, still the spiral sets up the air flue in the fusion tube, sets up a plurality of exhaust holes of arranging along the air flue route is equidistant in the fusion tube, the exhaust hole runs through the fusion tube setting and is linked together with the air flue.

Furthermore, a sealing rubber block is arranged in the outer side end of the exhaust hole.

Furthermore, a gap of 0.2-0.5 mm exists between the fuse wire and the core tube.

Further, the thickness of the core tube is 1-2 mm.

The working principle is as follows: after the electric current in the fuse transships, the temperature of fuse rises fast, the temperature risees to core pipe reaction temperature in the fusion tube, core pipe produced a large amount of white smoke fast this moment, the fusion tube internal pressure increases and impresses the white smoke to the air flue via the exhaust hole in, white smoke is walked all the section of fusion tube and is implemented rapid cooling to the fusion tube along with the air flue fast after the white smoke gets into the air flue, finally inside the white smoke still via the exhaust hole discharge fusion tube, a large amount of heats have been carried to exhaust white smoke, the mesh of isolated outside air has still been played simultaneously, fuse or fusion tube burning have been prevented.

Has the beneficial effects that: through the structure, the active cooling when the temperature of the fusion tube is too high is realized, and the use safety of the fuse is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Reference numerals: 100. the fuse tube 110, the first end 120, the second end 130, the vent hole 200, the core tube 300, the first connection terminal 400, the second connection terminal 500, the fuse 600, the air channel 700, and the sealing rubber block.

Detailed Description

The technical solutions in the embodiments of 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 obvious 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.

A high voltage current limiting fuse bushing assembly as shown in fig. 1 includes a fuse tube 100 having a core tube 200 attached to an inner wall of the fuse tube. It should be noted that the fuse tube has a first end 110 and a second end 120, wherein the first end is mounted with a first connection terminal 300, which is made of a conductive material. On the second end, a second connection terminal 400 is mounted, which is also made of an electrically conductive material. Meanwhile, a fuse wire 500 is axially disposed in the fuse tube, and two ends of the fuse wire are respectively inserted into the first connection terminal and the second connection terminal to be conducted with the first connection terminal and the second connection terminal. Meanwhile, an air passage 600 is spirally arranged in the fusion tube, and the air passage is formed by winding a hollow insulating thin tube in the fusion tube during the manufacturing of the fusion tube. In addition, a plurality of exhaust holes 130 are arranged in the melting tube at equal intervals along the path of the air passage, and the exhaust holes penetrate through the melting tube and are communicated with the air passage. It should be noted that the utility model discloses the well core pipe adopts the cotton paper of infiltration zinc chloride to coil the suppression and forms, after the fuse overload produces a large amount of heats, temperature in the fusion tube risees to zinc chloride reaction temperature, adsorbed zinc chloride produces a large amount of nonflammable white cigarette in the core pipe this moment, this white cigarette absorbs a large amount of heats in the fusion tube with the fusion tube contact back, white cigarette in the fusion tube afterwards is because atmospheric pressure increases and is impressed in the air flue through the exhaust hole, the white cigarette is walked throughout the fusion tube in the air flue fast, realize discharging via the exhaust hole after absorbing fast to the heat in the fusion tube.

As a further improvement of the above embodiment, in order to prevent external moisture and impurities from entering the melting tube through the exhaust hole to affect the stability of the zinc chloride in the core tube, a sealant block 700 is provided at the outer end of the exhaust hole. When the pressure is larger than a certain value, the sealing rubber block is blown out of the vent hole to ensure that the vent hole keeps smooth.

As a further improvement of the above embodiment, a gap of 0.2-0.5 mm exists between the fuse wire and the core tube to provide a certain buffer space for the white smoke generated by the core tube, so as to prevent the tube explosion caused by the excessive pressure of the fuse tube due to the generation of the white smoke.

As a further improvement of the above embodiment, the core tube has a thickness of 1 to 2mm. The thickness is the optimal core tube thickness, and the white smoke generation amount is moderate under the thickness.

Claims

1. A high voltage current limiting fuse sleeve assembly characterized by: including the fusion tube, set up the core pipe with the laminating of fusion tube inner wall in the fusion tube, the fusion tube has first end and second end, and first connection terminal is connected to first end, and second connection terminal is connected to the second end, and the axial sets up the fuse in the fusion tube, and the both ends of fuse are pegged graft respectively in first connection terminal and second connection terminal, still the spiral sets up the air flue in the fusion tube, sets up a plurality of exhaust holes of arranging along the air flue route is equidistant in the fusion tube, the exhaust hole runs through the fusion tube setting and is linked together with the air flue.

2. A high voltage current limiting fuse sleeve assembly as recited in claim 1 wherein: and a sealing rubber block is arranged in the outer side end of the exhaust hole.

3. A high voltage current limiting fuse sleeve assembly as recited in claim 1 or 2 wherein: a gap of 0.2-0.5 mm exists between the fuse wire and the core tube.

4. A high voltage current limiting fuse sleeve assembly as claimed in claim 1 or 2 wherein: the thickness of the core tube is 1-2 mm.