CN2759671Y

CN2759671Y - Automatic safety energy-saving apparatus of electric welding machine

Info

Publication number: CN2759671Y
Application number: CNU200420075240XU
Authority: CN
Inventors: 宋德民; 郭清林
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-26
Filing date: 2004-11-26
Publication date: 2006-02-22
Anticipated expiration: 2014-11-26

Abstract

The utility model relates to an automatic safety energy-saving apparatus of an electric welding machine, and is characterized in that a normally open contact of an alternating current contactor is connected between a power supply and the welding machine; a capacitor is connected with the two ends of the contact in parallel, which is used for idling cross-connection; a welding holder wire is sheathed with a current mutual coil to obtain a starting up signal; a switch circuit of controlled silicon is controlled by the starting up signal, and accordingly, the alternating current contactor realizes that a power supply is switched on when the electric welding machine welds, and the power supply is switched off when the electric welding machine does not weld; when the alternating current contactor is no-load, the power supply is switched off, and the purposes that energy is saved and the personal safety of welders is guaranteed are achieved; simultaneously, the power factor of the welding machine is raised and the voltage quality of power supply system is improved, and also, the reactive power loss of users is reduced and the service life of the welding machine is extended.

Description

Electric welding machine automatic safe energy-saving appliance

Technical field:

Can be when the utility model belongs to a kind of electric welder no-load from the energy-saving safe device of outage.

Technical background:

A large amount of electric welding machine operations are manual weldings, and majority is worked than under the harsh conditions at environment, its floating voltage is at 50-70V, have up to more than the 90V, safe voltage far above 36V, exist the hidden danger that jeopardizes personal safety, especially meet with the secondary injury that electric shock causes, as get injured by a fall, accident such as injuring by a crashing object happens occasionally, particularly at wet weather, moist, have in the environment that chemical gas exists more remarkable, in addition, electric welding machine also is a power consumption rich and influential family, and its load is intermittent, idle time is more than working time (the unloaded power consumption of the welding machine that general arcing time factor is low can be over half what always consume energy), power factor when unloaded has only 0.1～0.3, not only also influence generating of power consumption, the quality of voltage of power transformation and electric power system is for the electric energy of saves valuable and guarantee electric welder's personal safety, had multiple safe energy saving device, but all because of complex structure, the fault rate height is difficult to adapt to the inner strong magnetic field of electric welding machine bad working environment and welding machine and disturbs, so be difficult to realize industrialization.

The utility model content:

The purpose of this utility model is to overcome the deficiency that exists in the above-mentioned technology, a kind of electric welding machine automatic safe energy-saving appliance is provided, it is characterized in that: series connection A.C. contactor normally opened contact between power supply and welding machine, the capacitor in parallel at the two ends, contact, be used for unloaded commissure, cover one electric current mutual inductor on the electrode holder line, be used to obtain starting-up signal, with starting-up signal control silicon controlled on-off circuit, connect power supply when making A.C. contactor realize welding, deenergization when not welding, it is energy-conservation to cut off the power supply when reaching zero load, ensures the purpose of welder's personal safety, also improved simultaneously the power factor of welding machine, improve the quality of voltage of electric power system, reduced user's reactive loss, improved the service life of welding machine.

Description of drawings:

Accompanying drawing is the schematic diagram of the utility model one embodiment

The specific embodiment:

The utility model will be further described below in conjunction with accompanying drawing embodiment, T is an electric welding machine in the accompanying drawing, after power switch HK connects, because A.C. contactor KM normally opened contact open circuit, power supply makes the primary side of welding machine have certain signal code to pass through by commissure capacitor C 1, the secondary side two ends produce signal voltage (about 12V), control section also is switched on power supply simultaneously, alternating current is added on anode-negative electrode of controllable silicon VS1 through rectifier VD1～VD4 rectification, voltage is through resistance R 1 simultaneously, diode VD5 and the controllable silicon VS1 control utmost point-negative electrode are to capacitor C 2 chargings, charging current makes the VS1 conducting, the rectifier diagonal angle is connected, the adhesive of A.C. contactor KM normally opened contact, welding machine is in running order, along with the C2 charging finishes, VS1 turn-offs, KM discharges normally opened contact, and circuit is in wait state, at this moment if weld, welding rod is connected the secondary side of welding machine by workpiece, make mutual inductor L produce electric current, conducting controllable silicon VS2, capacitor C 2 will be by VS2 and resistance R 2 short circuit dischanges, at this moment the control utmost point-negative electrode of VS1 has electric current to pass through, the VS1 conducting, with rectifier diagonal angle short circuit, the adhesive of A.C. contactor normally opened contact, welding machine enters duty, welding finishes, and during welding machine secondary side open circuit, does not have electric current to pass through on the electrode holder line, L loses electric current, VS2 turn-offs, and C2 is recharged, the VS1 conducting of delaying time, finish up to the C2 charging, VS1 turn-offs, and KM discharges and often straightens one out and ease out his anxiety the contact, and welding machine is got back to wait state again.

VD1～VD4 also can use rectifier bridge in the accompanying drawing, and VS1, VS2 also can use bidirectional triode thyristor, and KM also can use high power relay.

Claims

1, a kind of electric welding machine automatic safe energy-saving appliance, it is characterized in that: series connection A.C. contactor normally opened contact between power line and welding machine, the capacitor in parallel at the two ends, contact, cover one electric current mutual inductor on the electrode holder line of welding machine, be used to obtain starting-up signal, starting-up signal control silicon controlled on-off circuit is connected power supply when making A.C. contactor realize welding, time-delay deenergization when not welding.

2, a kind of electric welding machine automatic safe energy-saving appliance according to claim 1, it is characterized in that: VD1～VD4 also can use rectifier bridge in the circuit, and VS1, VS2 also can use bidirectional triode thyristor, and KM also can use high power relay.