CN2142769Y - Silicon positive current welding machine with arc stabilizing system - Google Patents

Abstract

A silicon positive current welder with an arc stabilizing system is applied to the field of metal welding, and is internally provided with a pulse generator, a delay trigger, the arc stabilizing system and an automatic switch for connecting the arc stabilizing system with a secondary loop of the welder. The welding rod weldment is contacted, the pulse signal makes the time delay trigger work, the trigger makes the automatic switch conduct, the arc stabilizing system and the secondary loop of the welding machine continuously carry out arc stabilizing work, the welding rod weldment is separated from a certain time delay, the automatic switch is turned off, and the arc stabilizing system is withdrawn from work. The output voltage of the secondary winding of the arc stabilizing system welding machine can be reduced by 20-50% due to the addition of the secondary winding.

Description

Silicon positive-current welding machine with arc-stabilising system

Be applied to the metal solder field.Traditional welding machine stabilising arc method is high-frequency and high-voltage or the high voltage pulse stable arc with thousands of volts, the time of single-phase silicon drag flow welding machine stable arc, be that silicon drag flow DC welder is near point of zero voltage, its shortcoming is the components and parts and the insulation of the high butt welding machine of stabilising arc electricity high pressure, and the welder is also had big shock hazard.

The purpose of this utility model: be to provide a kind of new welder that has high economize on electricity again that promptly has stabilising arc system and don't injury equipment and personal safety to people.

Embodiment is such: at the secondary direct current stabilising arc voltage that is provided with welding machine output voltage same polarity of welding machine, this magnitude of voltage should be big as much as possible, but should meet the requirement of the trouble free service voltage of the secondary silicon drag flow components and parts such as (containing controllable silicon) of welding machine.Stabilising arc voltage height also can damage the welder, safety stabilising arc voltage and the secondary disconnection of welding machine when welding machine is unloaded for the welder, between stabilising arc system and welding machine are secondary, an automatic switch is set like this, for automatic switch in welding machine striking and the automatic conducting of normal work period, be provided with the triggering system of a control automatic switch break-make again, this system triggers power supply by impulse voltage generator and low-voltage direct to synthesize, it is secondary that the pulse voltage peer property of impulse generator output is connected in parallel on welding machine, when welding rod and weldment disengage, pulse voltage can make low-voltage dc power supply work make the automatic switch conducting.Turn-off when welding rod and weldment disengage a fixed response time automatic switch, stabilising arc voltage and the secondary disengaging of welding machine when welding machine is unloaded like this is so guaranteed welder's safety.Stabilising arc power pulse power supply and low-voltage dc power supply are from control transformer BK.

Owing to taked above-mentioned measure, welding machine main body welding transformer secondary winding voltage can reduce.So just, save more copper and silicon steel sheet, guaranteeing welding current, saved a large amount of electric energy under the preceding topic of welding quality simultaneously.Use present technique, welding machine is saved copper, iron 20～50%, economizes on electricity about 20～50%.Have bigger economic benefit and social benefit.

Accompanying drawing is a schematic diagram of the present utility model, and welding machine electric power is a single phase poaer supply, and three phase mains also is suitable for present technique.

Illustrated in conjunction with the accompanying drawings.

BHG is a silicon drag flow welding machine, and BK is a control transformer, its elementary winding L ₁Elementary in parallel with BHG connects power supply, BK secondary windings L simultaneously ₂Provide power supply to impulse generator, the course of work of impulse generator is as follows: L ₂The a terminal voltage is timing, diode D ₁Forward conducting, forward conducting, forward voltage is through resistance R ₁To C ₁L is worked as in charging ₂D when a terminal voltage is negative ₁Oppositely end, negative voltage is through diode D ₂Resistance R ₂To capacitor C ₂Charging, C ₂When both end voltage reaches the breakdown voltage of bidirectional trigger diode 2CTS, C ₂Both end voltage adds to bidirectional triode thyristor 3CTS ₁Control utmost point anode on 3CTS ₁Conducting, C ₁Both end voltage is through the elementary discharge of pulse output transformer BMC, and BMC time level just has pulse voltage output, the secondary windings of BMC and pulse detection primary winding resistance R ₃Diode D ₃Series connection back and BHG level peer's property R in parallel ₃Play metering function, influence striking sensitivity simultaneously, D ₃Guarantee that pulse voltage is in parallel with BHG secondary output voltage same polarity.

The course of work of stabilising arc system: BK secondary windings L ₃System provides power supply to stabilising arc, through drag flow bridge ZLQ ₂Positive flow point two-way output, its voltage peak is hundreds of volts, the one tunnel through resistance R ₁₀To capacitor C ₆Charging, another road is through resistance R ₁₂To capacitor C ₅Charging is as bidirectional triode thyristor 3CTS ₃During conducting, C ₆Both end voltage is through diode D ₆Resistance R ₉Add to the welding machine secondary loop, simultaneously C ₅Both end voltage is through resistance R ₁1 adds to the BHG secondary loop, selects R like this ₉Be several ohm, C ₆Capacity is favourable to the starting the arc when welding rod HT contacts with weldment HJ more like this, resistance R ₁₁Resistance is bigger, even if HT and HJ short circuit, C ₅Also there is higher voltage at two ends, help striking, D like this ₆Effect be with C ₅With C ₆Isolate, work as C ₆When having put electricity, C ₅Both end voltage is unlikely by C ₆Be pulled to electronegative potential.

Flip-flop operation process: BH secondary windings L ₃The alternating voltage of output is through drag flow bridge ZLQ ₁Drag flow output pulsed dc voltage, as the b point voltage, the b point voltage is through diode D ₅Export capacitor C to ₄, the C point voltage just has been pure direct current.When HT contacts with HJ, the BMJ secondary windings just has pulse voltage output, and this voltage is through diode D ₄The control utmost point G that forward adds to controllable silicon 3CT makes the 3CT conducting on extremely, simultaneously triode BG ₁Saturated, the b point voltage is just through resistance R ₅To capacitor C ₃Charging is again through resistance R ₆The A.K of PUT exports triode BG to ₂Ground level on make BG ₂Saturated, the pure direct current of C point is just through resistance R ₁₃Add to bidirectional triode thyristor 3CTS ₂Control utmost point G extremely go up and make 3CTS ₂Conducting, C ₅, C ₆Both end voltage just same polarity adds to the level two ends BHG time.3CT turn-offed BG voluntarily when the A.K utmost point both end voltage of 3CT was zero ₁End, at this moment C ₃Both end voltage is through resistance R ₅, R ₆To the PUT(procedure control monoclinic transistor) the A.K utmost point.BG ₂B.e and 3CTS ₂GK utmost point discharge, keep time-delay conducting and the BG of PUT ₂Saturated, promptly keep 3CTS ₂The conducting delay time of keeping the PVT conducting can be the several seconds, as long as just HT and HJ electricity arranged be connected 3CT conducting continuously, also just can make 3CTS ₂Continuous conducting, thus continuous the adding on HT and the HJ of stabilising arc voltage arranged, HT and HJ break away from electricity be connected a fixed response time after (several seconds as mentioned above) PUT turn-off (this is by characteristic decision of PVT), PUT closes the 3CTS that has no progeny ₂Also turn-off, the used higher voltage of stabilising arc breaks away from the secondary loop of BHG, and the welder also just has been safe from danger.Stabilising arc voltage is higher, but electric current is less, and wasted work is little.

Facts have proved and adopt above-mentioned measure and technology really can reduce the secondary windings output voltage of welding transformer significantly, reach high purpose of saving.

Claims (4)

1, can carry out metal solder work, has the instantaneous large-current striking, dc high voltage, the silicon drag flow welding machine of little electric current stabilising arc system, of the present utility model being characterised in that: the welding machine control section is made of triggering system and stabilising arc system, and the stabilising arc system is in parallel with the welding machine output loop through automatic switch.

2, its spy of welding machine according to claim 1 is from being: by R ₉, R ₁₀C ₆The arc ignition system and the R that form ₁₁, R ₁₂, C ₅The stabilising arc system parallel connection of forming is by automatic switch 3CTS2 output, D ₆With C ₅With C ₈Isolate.

3, welding machine according to claim 1 is characterized in that: impulse generator is by D ₁, R ₁, C ₁, 3CTS ₁The anode negative electrode constitute direct impulse and produce loop, D ₂, R ₂, C ₂, 2CTS, 3CTS control utmost point negative electrode constitute negative sense and trigger the loop.

4, welding machine according to claim 1 is characterized in that: PUT, BG ₁, R ₅, C ₃, 3CT etc. constitutes continuous time-delay trigger.

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