CN202796817U

CN202796817U - Rapid fuse with ultra-high breaking capacity

Info

Publication number: CN202796817U
Application number: CN 201220375327
Authority: CN
Inventors: 刘双库
Original assignee: XI'AN XIZHENG FUSE WORKS
Current assignee: XI'AN XIZHENG FUSE WORKS
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2013-03-13
Anticipated expiration: 2022-07-31

Abstract

The utility model, which relates to the field of the low-voltage electrical equipment control technology, discloses a rapid fuse with the ultra-high breaking capacity. The rapid fuse comprises a ceramic material-made porcelain tube and a plurality of silver sheet-made melts penetrating the porcelain tube, wherein current-conducting plates are arranged at two ends of the ceramic material-made porcelain tube. Specifically, the current-conducting plates are copper or aluminous water-cooled ones; two ends of the melts are welded on the current-conducting plates directly or through connecting plates; and a plurality of circular holes are punched on each of the melts. In addition, the porcelain tube is filled with solidified compound quartz sands mainly containing silicate; the length of the contour of the porcelain tube is 115mm to 125mm and the width thereof is 115mm to 125mm; the wall thickness is 11mm to 14mm; the height is 37mm to 43mm, 57mm to 63mm or 77mm to 83mm. According to the utility model, the provided rapid fuse has characteristics of 230-kA ultra-high breaking capacity, fast breaking speed, high current magnitude and small I<2>t value of the breaking energy and the like.

Description

Super high drudging power fast fuse

Technical field

The utility model relates to low voltage electrical equipment control technology field, relates to a kind of for the semi-conductive fast acting fuse of protection in the heavy-duty rectifier.

Background technology

In recent years, along with power electronic technology is fast-developing, the electric current and voltage of semiconductor device increases, rectifier power take semiconductor device as core also increases thereupon, the rectifying device electric current of present unit group is way 70kA～1000kA, commutating voltage 500V～1500V, supporting rectifier transformer power reaches 50MVA～100MVA.In this super high power rectifier; because the rectifier bridge arm short circuit current that semiconductor device damages can reach 200kA even larger; this protects the fast acting fuse of semiconductor device by using to have 200kA and larger breaking capacity with regard to requiring; so just may be when device breaks down disjunction short circuit current reliably; the isolated fault device; thereby the normal operation of protection rectifier makes industrial DC power source safety power supply.In the prior art, the breaking capacity of domestic fast acting fuse product is generally 50kA～100kA, the external product majority is 100kA～200kA, though and the fast acting fuse product of breaking capacity more than 200kA has report abroad, but capacity quick fuse is also not yet seen in this area so far in the audience hall, because at present domestic and international many fuse manufacturing enterprise all is devoted to develop the large capacity quick fuse of the above superelevation breaking capacity of 200kA, to satisfy supporting needs in the heavy-duty rectifier development.

The utility model content

The purpose of this utility model is, proposes a kind of super high drudging power fast fuse, and it is simple and reasonable, has the above superelevation breaking capacity of 200kK.

For achieving the above object, the utility model provides a kind of super high drudging power fast fuse, comprise that two ends are with ceramic material porcelain making pipe and a plurality of silver strip melt processed that penetrates in the porcelain tube of conductive plate, described conductive plate is copper or aluminium matter water-cooled conductive plate, the melt two ends directly or by brace are welded on the conductive plate, in each melt upper punch a plurality of circular holes are arranged, be filled with the quartz sand that solidifies as main compound take silicate in the described porcelain tube, the length of this porcelain tube external form * wide is 115mm～125mm * 115mm～125mm, wall thickness is 11mm～14mm, and height is 37mm～43mm, 57mm～63mm or 77mm～83mm.

In the utility model, the conductive plate of described porcelain tube one end can be shape of plate plane, and the conductive plate of its other end is the quincunx plate with symmetric figure 4 * M12 screw.

Perhaps, the conductive plate of described porcelain tube one end is the shape of plate plane with dipteron shape, and the conductive plate of its other end is the quincunx plate with symmetric figure 4 * M12 screw.

In addition, the diameter of the circular hole that rushes is 1.3mm～1.7mm on the described melt, and two hole vertical direction spacings are 1.4mm～1.9mm, and two hole horizontal direction spacings are 6mm～10mm.

Super high drudging power fast fuse of the present utility model, it is simple in structure, have the above superelevation breaking capacity of 200kA, and its product can be used for metallurgy, chemical industry, electrolysis power, AC/DC motor transmission with in the high-power or extra heavy rectifiers such as power supply.

Description of drawings

Fig. 1 is the front view of single fusion tube structure of the present utility model.

Fig. 2 is the end view of Fig. 1.

Fig. 3 is the front view of duplex melting tube structure of the present utility model.

Fig. 4 is the end view of Fig. 3.

Embodiment

Referring to accompanying drawing, super high drudging power fast fuse described in the utility model comprises that two ends are with

conductive plate

4,5 high strength ceramic material porcelain making pipe 1 and a plurality of silver strip melt 2 processed that penetrates in the porcelain tube 1, described

conductive plate

4,5 is copper or aluminium matter water-cooled conductive plate, melt 2 two ends directly or by brace 3 are welded on conductive plate 4, on 5, in each melt 2 upper punch a plurality of circular holes are arranged, be filled with the quartz sand 6 that solidifies as main compound take silicate in the described porcelain tube 1, the length of this porcelain tube 1 external form * wide is 115mm～125mm * 115mm～125mm, wall thickness is 11mm～14mm, and height is 37mm～43mm, 57mm～63mm or 77mm～83mm.

In the utility model, because porcelain tube 1 is made by high strength ceramic material, can tolerate high I ²T value, its height A are 40mm, 60mm, three kinds of specifications of 80mm, and external diameter is 120mm * 120mm.Melt 2 is fast and I by many fusing speed ²0.11～0.16mm thickness silver strip punching out that the t value is little forms, and the melt two ends are welded on brace 3 and the conductive plate 4, and brace 3 is welded on the conductive plate 5.Every melt 2 upper punches have a plurality of circular holes, and the diameter of the circular hole that rushes is 1.3mm～1.7mm, and two hole vertical direction spacings are 1.4mm～1.9mm, and two hole horizontal direction spacings are 6mm～10mm.The utility model tamps quartz sand 6 equably around melt 2, and is that the compound of leading is solidified into entity with sodium metasilicate.

As a kind of specific embodiment of the present utility model, in single fusion tube structure illustrated in figures 1 and 2, the conductive plate 4 of fuse one end is shape of plate plane, and the conductive plate 5 of its other end is the quincunx plate with symmetric figure 4 * M12 screw.As another kind of specific embodiment of the present utility model, in the fuse structure of Fig. 3 and two porcelain vase parallel connections shown in Figure 4, the difference of itself and above-described embodiment is, the conductive plate 4 ' of porcelain tube 1 one ends is the shape of plate plane with dipteron shape, the conductive plate 5 ' of its other end be two with the quincunx plate of symmetric figure 4 * M12 screw.This structure is conducive to be installed in carries out single face on the water cooling copper bar of heavy-duty rectifier and forces the water flowing cooling, reduces the fuse temperature rise, guarantees product quality.

Operation principle of the present utility model is: fuse is everlasting and is connected in series with semiconductor device in the heavy-duty rectifier brachium pontis, when passing through 200kA or larger short circuit current in case device fault forms rectifier transformer secondary side short circuit, melt fusing in the fuse, vaporization, arcing, blow-out after the energy of electric arc is absorbed by quartz sand and disjunction fault branch reliably keeps rectifier normally to move.Because this fuse has 230kA superelevation breaking capacity, can guarantee successfully disjunction of short circuit current huge in the high-power reorganizer, the concurrent alarm of being out of order, the computer-controlled demand of comprehensive automation of cooperation DC power-supply system.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. super high drudging power fast fuse, it is characterized in that, comprise that two ends are with ceramic material porcelain making pipe and a plurality of silver strip melt processed that penetrates in the porcelain tube of conductive plate, described conductive plate is copper or aluminium matter water-cooled conductive plate, the melt two ends directly or by brace are welded on the conductive plate, in each melt upper punch a plurality of circular holes are arranged, be filled with the quartz sand that solidifies as main compound take silicate in the described porcelain tube, the length of this porcelain tube external form * wide is 115mm～125mm * 115mm～125mm, wall thickness is 11mm～14mm, and height is 37mm～43mm, 57mm～63mm or 77mm～83mm.

2. super high drudging power fast fuse as claimed in claim 1 is characterized in that, the conductive plate of described porcelain tube one end is shape of plate plane, and the conductive plate of its other end is the quincunx plate with symmetric figure 4 * M12 screw.

3. super high drudging power fast fuse as claimed in claim 1 is characterized in that, the conductive plate of described porcelain tube one end is the shape of plate plane with dipteron shape, and the conductive plate of its other end is the quincunx plate with symmetric figure 4 * M12 screw.

4. super high drudging power fast fuse as claimed in claim 1 is characterized in that, the diameter of the circular hole that rushes is 1.3mm～1.7mm on the described melt, and two hole vertical direction spacings are 1.4mm～1.9mm, and two hole horizontal direction spacings are 6mm～10mm.