CN2335731Y

CN2335731Y - Power-saving device for electric welder

Info

Publication number: CN2335731Y
Application number: CN 98238292
Authority: CN
Inventors: 李伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-17
Filing date: 1998-07-17
Publication date: 1999-09-01
Anticipated expiration: 2008-07-17

Abstract

The utility model discloses a power-saving device for an electric welder. The utility model is characterized in that a measuring transformer B2 is utilized to be connected with a welder in parallel; a primary A terminal and a primary B terminal of the transformer B2 are connected with a return circuit of an alternating current intermediate relay ZJ, the return circuit of an alternating current contactor QC and the return circuit of an alternating current time relay SJ; a secondary E terminal and a secondary F terminal of the transformer B2 are connected with the return circuits of two alternating current voltage relays 1 DY and 2DY. The utility model has the advantages of simple structure, convenient use, good energy saving effect, etc.

Description

Power economizer for electric welder

The utility model relates to a kind of power-saving technique, is a kind of power economizer for electric welder specifically.

Electric welding machine economize on electricity emphasis is unloaded economize on electricity, and do not do work during because of zero load exciting current and the heating of electric welding machine own will consume more electric energy, and idle time is long more, and the waste electric energy is just many more.The present electric welding machine that generally uses, no matter be that AC welding set or DC welder all belong to the zero load type of not economizing on electricity, and this part old-fashioned electric welding machine, because cost is low, durability is good, so adopted by vast industrial enterprise, quantity is a lot, and the electric energy of waste is very big, and this is the old problem of the individual fine solution of failing for a long time.Occurred the electric welding machine with the high technology content of electronic circuit control in recent years, its power savings is good, but working environment is required height, needs periodic maintenance, and cost is too high, and general factories and miness adverse circumstances are not too suitable, are difficult to generally promote the use of.

The purpose of this utility model is that design is a kind of simple in structure, and cost is low, and control is sensitive, and power consumption is few, the power economizer for electric welder that is suitable for.

To achieve these goals, adopted following technical scheme:

The utility model power economizer for electric welder, form by transformer and A.C. contactor, it is characterized in that this battery saving arrangement has adopted the measuring transformer in parallel with electric welding machine, be connected to three control loops that constitute by AC intermediate relay, A.C. contactor and exchange time relay and associated contacts at the elementary two ends of measuring transformer respectively; Be connected to two control loops that constitute by alternating voltage relay and associated contacts respectively at the secondary two ends of measuring transformer.

The utility model has following advantage:

The utility model is owing to adopted general electric device to form simple automatic control circuit, so the electric welding machine of this battery saving arrangement is installed, can be according to working condition, fast, accurately, switch on or off power supply safely automatically, especially in the high-altitude or carry out the just safer of weld job at a distance, operate also more convenient.Electric welding machine is after having adopted this device, can reduce open circuit loss greatly, the open circuit loss of existing electric welding machine is saved more than 95, for jumbo electric welding machine, power savings is more obvious, and can prolong the service life of electric welding machine, especially to transforming a large amount of at present old-fashioned electric welding machines that use, have more universal significance, economic benefit is more considerable.

The knot drawings and Examples are further described below.

Accompanying drawing is the principle schematic that is equipped with the A.C. welder of battery saving arrangement;

B among the figure ₁Be the transformer of A.C. welder, G is an electrode holder sparking point, B ₂Be the measuring transformer of power economizer for electric welder, B ₂Elementary A, B two ends be connected to three control loops respectively: AC intermediate relay ZJ loop, by the normally closed contact QC of A.C. contactor QC ₂, alternating voltage relay 2DY contact 2DY ₁Link formation, B with relay ZJ ₂Primary coil one terminates at contact QC ₂And 2DY ₁Node C on; A.C. contactor QC loop is by the normally closed contact SJ of exchange time relay SJ ₁, A.C. contactor QC contact QC ₄With ZJ ₁The in parallel binding constitutes; Exchange time relay SJ loop is by alternating voltage relay 1DY contact 1DY ₁Link formation with exchange time relay SJ; At measuring transformer B ₂Secondary E, two loops of alternating voltage relay 1DY, 2DY that the F two ends are connected with respectively, alternating voltage relay 1DY loop is by the normally closed contact QC of A.C. contactor QC ₃, alternating voltage relay 2DY normally closed contact 2DY ₂, alternating voltage relay 1DY and adjustable resistance R link and constitute; Alternating voltage relay 2DY loop only is connected with 2DY.

The electric welding machine course of work of battery saving arrangement is installed below in conjunction with description of drawings:

Earlier this battery saving arrangement is installed on the electric welding machine, is about to electric welder transformer B ₁Elementary two ends connect and exchange the contact QC that meets QC ₁, then with B ₁Just, inferior two ends and B ₂Just, inferior two ends are corresponding links; Be the A.C. welder principle schematic that battery saving arrangement is housed among the figure, this device also can be used on the dc welding machine.When unloaded, QC loss of excitation, QC ₁Disconnect B ₁Elementary outage, at this moment, by normally closed contact QC ₂Give B ₂Provide unloaded measuring voltage, promptly through normally closed contact QC ₃To electric welder transformer B ₁Level time sparking point G output, the E point voltage is 34V, the 2DY excitation, normally closed contact 2DY1 disconnects, and causes ZJ, QC, the equal loss of excitation of SJ relay, and this moment is only by B ₂0.4A is provided no-load current.

During electric welding machine work, electrode holder sparking point G strikes sparks B over the ground ₂The secondary end transient voltage reduces, 2DY loss of excitation, normally closed contact 2DY ₁Closure makes ZJ, QC excitation, simultaneously normal opened contact QC ₄Closed self-insurance, normal opened contact QC ₁Closed power supply guarantees the electric welding machine operate as normal, meanwhile QC ₂Disconnect, cut off B ₂Power supply, B ₂The 2DY of secondary end, ZY loss of excitation, 1DY and normally closed contact 2DY ₂Connect in people's electric welding machine secondary loop, the action sensitivity of 1DY is adjusted by R, when electric welding machine quits work, and when promptly the G point is not struck sparks, 1DY excitation, normal opened contact 1DY ₁Closure, SJ charging this moment, SJ is the control electric welder no-load for the electricity time, and the time is adjustable, generally is no more than 10 minutes, use the time for changing welding rod, and overtime SJ moves, normally closed contact SJ ₁Disconnect QC loss of excitation, QC ₁Disconnect electric welding machine outage, normally closed contact QC ₂Closure, B ₂In generation, is electric, and the 2DY excitation is waited for sparking next time; The practicality of this battery saving arrangement, work is sensitive, accurate, the once i.e. action of sparking, power savings is obvious, for the electric welding machine of 30KVA, adopt this battery saving arrangement before, no-load current is 27A, and open circuit loss is 8.208KW, adopt this battery saving arrangement after, no-load current＜0.5A, open circuit loss 0.093KW is behind the employing battery saving arrangement, energy-saving efficiency reaches 98%, every electric welding machine 16.4 degree that can economize on electricity every day, and every electric welding machine year economize on electricity reaches 9840 degree, as generally promoting present technique, economic benefit is considerable.

Claims

1, a kind of power economizer for electric welder is made up of transformer and A.C. contactor, it is characterized in that this battery saving arrangement has adopted the measuring transformer B in parallel with electric welding machine ₂, at measuring transformer B ₂Elementary A, B two ends are connected to three control loops that are made of AC intermediate relay ZJ, A.C. contactor QC and exchange time relay SJ and associated contacts respectively; At measuring transformer B ₂Secondary E, F two ends be connected to two control loops that constitute by alternating voltage relay 1DY, 2DY and associated contacts respectively.

2, according to the described battery saving arrangement of claim 1, it is characterized in that measuring transformer B ₂Three control loops being connected to respectively of elementary A, B two ends, AC intermediate relay ZJ loop is by the normally-closed contact QC of A.C. contactor QC ₂, alternating voltage relay 2DY contact 2DY ₁Link formation, B with relay ZJ ₂Primary coil one terminates at contact QC ₂And 2DY ₁Node C on; A.C. contactor QC loop is by the normally closed contact SJ of exchange time relay SJ ₁, A.C. contactor QC and contact QC ₄With ZJ ₁The in parallel binding constitutes; Exchange time relay SJ loop is by the contact 1DY of alternating voltage relay 1DY ₁SJ connects and composes with the exchange time relay; At measuring transformer B ₂Secondary E, F two ends be connected with two loops of alternating voltage relay 1DY, 2DY respectively; Alternating voltage relay 1DY loop is by the normally closed contact QC that exchanges contact QC ₃, alternating voltage relay 2DY normally closed contact 2DY ₂, alternating voltage relay 1DY and adjustable resistance R link and constitute; Alternating voltage relay 2DY loop only is connected with 2DY.