CN2794714Y

CN2794714Y - Power saving switch for welder

Info

Publication number: CN2794714Y
Application number: CN 200520072374
Authority: CN
Inventors: 董绍付
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-03
Filing date: 2005-06-03
Publication date: 2006-07-12
Anticipated expiration: 2015-06-03

Abstract

The utility model relates to a power saving switch for electric welders, and is characterized in that a voltage drop and rectification circuit is arranged between any two phase wires of a three phase power supply of the electric welder; a direct current signal put out as a rectification signal is used as a direct-current working power supply; the output circuit of the direct-current working power supply is provided with a miniature relay and a pressing switch which is connected with the miniature relay in series; the pressing switch and a handle of welding tongs are in linking; when the handle of the welding tongs is held by hands, the pressing switch is closed; when the handle of the welding tongs is loosened, the pressing switch is opened; normally open contacts of an alternating current contactor and the miniature relay are arranged in a power supply loop of the alternating current contactor in series; three normally open contacts of the alternating current contactor are respectively connected with a power supply loop of the primary end of a welder transformer in series. The utility model adopts that the pressing switch linked with the welding tongs is controlled by the relay, and accordingly, the loss of no-load current is eliminated and the purpose of power saving is achieved.

Description

The electric welding machine battery-conserving switch

Technical field:

The utility model relates to the electric welding machine annex, a kind of battery-conserving switch that is applied on the electric welding machine of more specifically saying so.

Background technology:

Electric welding machine is because of having no-load current, in case power connection just has current loss.Even if changing welding rod, measurement, proofreading and correct, strike coating etc. and be interrupted under the welding working condition, welding machine still has the no-load current loss, causes waste of energy.

Summary of the invention:

The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of electric welding machine battery-conserving switch being provided, to eliminate no-load current loss, the saves energy of electric welding machine.

The technical scheme that the utility model technical solution problem is adopted is:

Design feature of the present utility model is characterized in that between any two phase lines of electric welding machine three phase mains step-down, rectification circuit being set, direct current signal with rectification output is a dc supply, miniature relay KJ is set in the output loop of described dc supply, that connect setting with described miniature relay KJ is Push switch QA, Push switch QA and welding clamp handle interlock, when holding welding clamp handle, Push switch QA is closed, when unclamping welding clamp handle, Push switch QA is for opening; A.C. contactor KC is set, and the normally opened contact KJ-1 series connection of miniature relay KJ is arranged in the electric power loop of A.C. contactor KC, and three normally opened contact KC-1 of A.C. contactor KC are serially connected in respectively in the primary side electric power loop of welder transformer T2.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

The utility model be with the Push switch of welding clamp handle interlock, by relay control, eliminate no-load current, and then eliminate the no-load current loss, can reach aim of power saving.

Description of drawings:

Accompanying drawing is the utility model structural representation.

The specific embodiment:

Referring to accompanying drawing, present embodiment is between any two phase lines of electric welding machine three phase mains step-down, rectification circuit to be set, direct current signal with rectification output is a dc supply, miniature relay KJ is set in the output loop of dc supply, and that connect setting with miniature relay KJ is Push switch QA, Push switch QA and welding clamp handle interlock, when holding welding clamp handle, Push switch QA is closed, and when unclamping welding clamp handle, Push switch QA is for opening; A.C. contactor KC is set, and the normally opened contact KJ-1 series connection of miniature relay KJ is arranged in the electric power loop of A.C. contactor KC, and three normally opened contact KC-1 of A.C. contactor KC are serially connected in respectively in the primary side electric power loop of welder transformer T2.

When holding soldering turret enforcement welding operation, Push switch QA closure, the coil of miniature relay KJ gets, its normally opened contact KJ-1 connects, the coil of A.C. contactor KC thus, the normally opened contact KC-1 of A.C. contactor is closure state thereupon, and welder transformer T2 power supply is switched on, and drops into operate as normal.

When being interrupted welding operation, because of the openhanded pliers grip that snaps, Push switch QA disconnects, the coil of miniature relay KJ so dead electricity, its normally opened contact KJ-1 opens, and the normally opened contact KC-1 of A.C. contactor KC is the state of cut-offfing, and the primary coil electric power loop of welder transformer T2 is disconnected, eliminate no-load current, reach unloaded aim of power saving.

Claims

1, electric welding machine battery-conserving switch, it is characterized in that between any two phase lines of electric welding machine three phase mains, step-down, rectification circuit being set, direct current signal with rectification output is a dc supply, miniature relay KJ is set in the output loop of described dc supply, and that connect setting with described miniature relay KJ is Push switch QA, Push switch QA and welding clamp handle interlock, when holding welding clamp handle, Push switch QA is closed, and when unclamping welding clamp handle, Push switch QA is for opening; A.C. contactor KC is set, and the normally opened contact KJ-1 series connection of miniature relay KJ is arranged in the electric power loop of A.C. contactor KC, and three normally opened contact KC-1 of A.C. contactor KC are serially connected in respectively in the primary side electric power loop of welder transformer T2.