CN2270592Y

CN2270592Y - Electronic fuse

Info

Publication number: CN2270592Y
Application number: CN 96230021
Authority: CN
Inventors: 任玉才
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-11
Filing date: 1996-06-11
Publication date: 1997-12-17
Anticipated expiration: 2006-06-11

Abstract

The utility model relates to an electronic fuse for cutting a steel cable, which is composed of an outer shell (1), a fusing clip (2), a high-frequency transformer (8), a current conducting clip (9), a rectifying filter circuit (3) which is arranged in the shell, a main loop circuit (4), auxiliary power supply (5), a pulse width modulation circuit (6), electronic switches (7), etc. The utility model belongs to the national origination, and can fuse multi-strand ropes below 2MM in 0.2 second. The utility model has the advantages of small size, light weight, and convenient operation.

Description

Electronic fuse

The utility model relates to by electronic applications, specifically a kind of electronic fuse that is used to cut steel cable.

As everyone knows, steel cord (steel wire rope) or all needs to cut off when processed finished products in process of production, if with special-purpose high strength scissors, have more than is needed some months will change one, and broken lot is understood at the broken end place.If provide current fusing with Industrial Frequency Transformer, though there is not the edge of a knife, use the longevity to step on life length, performance is better than scissors, and weight is big, and efficient is low, and volume is big, uses inconvenient.

The utility model purpose is to overcome the fusing shortcoming that adopts above-mentioned Industrial Frequency Transformer, and a kind of electronic fuse of domestic and international initiative is provided, and the high temperature that utilizes electronic technology to produce cuts down steel wire rope.

The purpose of this utility model is such realization: according to the big current technique principle of high frequency, adopt electronic component, design a kind of electronic fuse that is used to cut steel cable, by shell (1), fusing folder (2), high frequency transformer (8), conductive clip (9), be placed in the current rectifying and wave filtering circuit (3) in the shell, main widely different road circuit (4), auxiliary power circuit (5), pulse-width modulation circuit (6), electronic switch compositions such as (7), power supply connects current rectifying and wave filtering circuit (3), current rectifying and wave filtering circuit (3) output one end connects, main widely different road circuit (4) input, another output connects auxiliary power circuit (5) input, auxiliary power circuit (5) output one end connects pulse-width modulation circuit (6), another output connects electronic switch (7), the other end of electronic switch (7) connects pulse-width modulation circuit (6), main widely different road (4) circuit output end connects frequency power transformer (8) input in the fusing folder (2), and high frequency transformer (8) tap one end feedback links to each other with pulse-width modulation circuit (6).Fusing folder (2) by high frequency transformer (8), conductive clip (9), touch starting switch (10) and form, high frequency transformer (8) output and conductive clip (9) join, and are connected the centre with conductive clip (9) at high frequency transformer (8) and are provided with starting switch.Conductive clip (9) is made up of insulating materials (10), copper billet chuck (11), spring (12), and spring is located in the middle of the insulating materials, and connecting two insulating materials formation clips provides contact pressure.

The utility model compared with prior art, weight is 1/10th of Industrial Frequency Transformer, and volume is 1/4th of an Industrial Frequency Transformer, and the distance that fusing clips to controller can arrive more than 1.2 meters, be convenient to mobile operating, efficient is 2 times of Industrial Frequency Transformer, and garden, broken end place is sliding, not broken lot, performance is better than Industrial Frequency Transformer, can fuse in 0.2 second multiply steel cord (steel wire rope) below 2 millimeters can fixedly mount or carry, and is easy to use.

Be described in further detail below in conjunction with accompanying drawing

Fig. 1 is the structural map of the utility model electronic fuse

Fig. 2 is the utility model electronic fuse electrical principle block diagram

Fig. 3 is the utility model electronic fuse electrical schematic diagram

Referring to Fig. 1,1-shell, 8-high frequency transformer, 9-conductive clip, 10-insulating materials, 11-copper billet.The electronic fuse dress is divided into two partly, and the one, the control circuit box, the 2nd, form the fusing folder by high frequency transformer and conductive clip, connect control circuit by lead.During use, earlier fuse is connected 220 volts of power supplys of alternating current, clip steel cable with dog again, steel cable must be clipped in the middle of the copper billet, otherwise will melt dog pincers plastics, clicks press button, and about about 0.2 second, steel cable fusing recovered to be equipped with state automatically.After using repeatedly,, keep the copper billet contact good, ban the use of the saw blade sheet and scrape with the brush residue on copper billet please.

Referring to Fig. 2,3-current rectifying and wave filtering circuit, the widely different road of 4-master circuit, 5-auxiliary power circuit, 6-pulse-width modulation circuit, 7-electronic switch, 8-high frequency transformer, 9-conductive clip.220 volts of power supplys of alternating current produce 300 volts of direct currents through rectifying and wave-filtering, Fen Erlu, and one the tunnel provides auxiliary power circuit usefulness, produces 15 volts of accessory power supplys, uses as pulsewidth modulation and electronic switch.Another road offers main widely different road, and the widely different road of master produces high frequency square wave under the pulse-width modulation circuit effect, the conductive clip in high frequency transformer output D' Arsonval current presss from both sides to fusing.The FEEDBACK CONTROL of taking a sample simultaneously pulse-width modulation circuit also is provided with soft start and short-circuit protection performance in the control circuit box.Electronic switch is the parts of control pulse width modulator working time, in case after the triggering work, recover SBR after several seconds automatically.Consumed power of whole machine is less than 5 watts when SBR, at fusing steel cord (steel wire rope) in the time of 0.2 second, provides energy about 200 watts in a bit, produces high temperature more than 1400 ℃ with steel cord (steel wire rope) fusing, has no progeny and automatically restores to SBR.Therefore, one day power consumption generally can not surpass 0.2 degree, so it also is a kind of energy-saving product.

Referring to Fig. 3,220 volts of input ac voltages, primary and secondary is withstand voltage greater than 1500 volts, and is safe and reliable, and circuit connects as shown in Figure 3.Produce 300 volts of DC voltages by current rectifying and wave filtering circuit, the one tunnel connects auxiliary power circuit, and 300 volts of voltages of direct current are reduced to 15 volts, uses as pulse-width modulation circuit and electronic switch.The 300 volts of DC voltages in another road connect main widely different road, main widely different road is under the system device effect that pulsewidth is transferred, produce high frequency square wave, conductive clip in high frequency transformer output D' Arsonval current presss from both sides to fusing, simultaneously with high frequency transformer voltage sampling FEEDBACK CONTROL pulse width modulator, reduce voltage with it, to reduce starting current.Also be provided with current-limiting protection device in the control circuit box.IC1, IC2, employing import integrated circuit component, quality is good, and is durable in use, not fragile.

Claims

1. electronic fuse that is used to cut steel cable, by shell (1), fusing folder (2), high frequency transformer (8), conductive clip (9), be placed in the current rectifying and wave filtering circuit (3) in the shell, main widely different road circuit (4), auxiliary power circuit (5), pulse-width modulation circuit (6), electronic switch compositions such as (7), it is characterized in that power supply connects current rectifying and wave filtering circuit (3), current rectifying and wave filtering circuit (3) output one end connects main widely different road circuit (4) input, another output connects accessory power supply (5) input, accessory power supply (5) output one end connects pulse-width modulation circuit (6), another output connects electronic switch (7), the other end of electronic switch (7) connects pulse-width modulation circuit (6), main widely different road circuit (4) output connects high frequency transformer (8) input in the fusing folder (2), and high frequency transformer (8) tap one end feedback links to each other with pulse-width modulation circuit (6).

2. the electronic fuse that is used to cut steel cable as claimed in claim 2, it is characterized in that fusing folder (2) by high frequency transformer (8), conductive clip (9), touch starting switch (10) and form, high frequency transformer (8) output and conductive clip (9) join, and are provided with starting switch in the middle of high frequency transformer (8) is connected with conductive clip (9).

3. as the right 2 described electronic fuses that are used to cut steel cable, it is characterized in that conductive clip (9) is made up of insulating materials (10), copper billet chuck (11), spring (12), spring is located in the middle of the insulating materials, and connecting two insulating materials formation clips provides contact pressure.