CN2225326Y - No-load cut-out device for electric welder - Google Patents

Abstract

The utility model discloses a no-load power-cut device for an electric welder, which is composed of a casing, a control transformer, a contactor, a middle relay, etc. The utility model is characterized in that the auxiliary side of the control transformer is connected in series with a keying control switch, and the keying control switch is arranged at the tail part of a weld handle and is connected with a control core wire in a purpose-made handle wire. The power is switched on or is cut off automatically when an operator holds or loosens the weld handle. The utility model has the advantages of simple structure, convenient control and low manufacture cost, and solves the striking arc difficulty of the no-load power-cut band of the electric welder with a long term.

Description

The electric welder no-load breaker device

The utility model relates to a kind of electric welding machine control device, particularly a kind of electric welder no-load breaker device that is made of shell, control transformer, electric shock device and auxiliary reclay etc.

Electric welding machine is a kind of metal solder equipment very commonly used.Because job specification decision, though welding machine in use is interruption work, welding transformer is connected usually all the time, thus the waste of energy that has caused the open circuit loss because of welding transformer to cause.Although the open circuit loss of welding transformer is smaller compared with rated capacity, because of the working time generally is far smaller than off time, therefore the electric energy of waste also is considerable.

In order to save the electric energy loss of Shen welding machine when the zero load, people once designed multiple electric welder no-load breaker device.On control principle, once used in the past device is to lean against the welding transformer secondary to utilize welding rod and workpiece short circuit to come start-control device to connect power supply, in operation, be actually and connect the arc of beating that power supply lags behind the welder and move, thereby cause starting the arc difficulty, and lost practical value.Chinese patent ZL90213731.X discloses a kind of electric welder no-load automatic power-off switch device, be to produce pulse during this device striking by control transformer power supply short circuit welding transformer secondary circuit, the conducting controllable silicon, auxiliary reclay energising rear makes main contactor energising, welding transformer normal power supply.Because striking moment is in the step-down power supply, still can not thoroughly solve the striking difficulty.And because this device has adopted controllable silicon pulse-triggered on-off circuit, unijunction transistor trigger control circuit and pulse transformer etc., make entire circuit seem complicated cumbersome, not only cost is than higher, and inconvenience field maintenance during fault, thereby influence is produced and used.

Task of the present utility model is the deficiency that will overcome above-mentioned prior art, designs a kind of easy electric welder no-load breaker device, and this device can be connected power supply automatically playing a forearc, in case and welding job stops, then this device also can be cut off the electricity supply automatically.

Task of the present utility model is achieved in that and adopts a kind of electric welder no-load breaker device, is made of shell, control transformer, contactor and auxiliary reclay.This apparatus features is that the secondary at control transformer is serially connected with the button gauge tap, and this gauge tap is arranged on the afterbody of electrode holder, operator grasps or switch on or off power supply when unclamping electrode holder automatically.

Better scheme of the present utility model is to adopt a kind of special handgrip line, and the control heart yearn that will be connected with gauge tap is arranged on the inside of this welding machine handgrip line, should control heart yearn with cable sheath and cable core and contain.The insulated heat cover can also be established in the periphery of this control heart yearn.

The utility model has been owing to adopted special handgrip line and key switch has been arranged on the electrode holder, thereby makes control circuit simple and reliable, and control is convenient freely.This device has not only solved the striking difficulty that the electric welder no-load outage of long-term puzzlement brings, and simple in structure, cheap for manufacturing cost.

Further specify below in conjunction with accompanying drawing.

Fig. 1 is the utility model control principle figure.

Fig. 2 is the utility model welding machine handgrip line structure schematic diagram.

Fig. 3 is the utility model electrode holder structural representation.

As shown in Figure 1, the secondary (the control transformer secondary is the safe voltage of 36V or 12V) at control transformer T2 has been connected in series a gauge tap [1].After connecting power switch K, as long as press gauge tap [1], just auxiliary reclay KA, contactor KM successively electric, connect welder transformer T2, the beginning welding job.Gauge tap [1] is arranged on the afterbody of electrode holder [3], and handgrip line [2] is promptly as supply lines, again as control line.

Fig. 2 illustrates the structure diagram of welding machine handgrip line.Welding machine handgrip line [3] is special, by cable sheath [4), cable core [5] and control heart yearn [6] constitute.Control heart yearn [6] is contained by cable sheath [4] and cable core [5].The crust of control heart yearn [6] should adopt heat resistant rubber.For the sake of assurance, the periphery of control heart yearn [6] preferably is provided with insulated heat cover [7], and material selection film class gets final product.

Fig. 3 is the electrode holder structural representation.As seen from the figure, gauge tap [1] is arranged in the groove of electrode holder [3] afterbody, is connected with the control heart yearn [6] that goes out in welding machine handgrip line [2].Electrode holder [3] should adopt the insulating materials manufacturing.

Claims (3)

1. electric welder no-load breaker device, constitute by shell, control transformer, contactor and auxiliary reclay etc., it is characterized in that, secondary at control transformer is serially connected with button gauge tap [1], described gauge tap [1] is arranged on the afterbody of insulation electrode holder [3], operator grasps or switch on or off power supply when unclamping electrode holder automatically.

2. electric welder no-load breaker device according to claim 1 is characterized in that, the control heart yearn [6] that is connected with gauge tap [1] is arranged on the inside of welding machine handgrip line [2], is contained by cable sheath [4] and cable core [5].

3. electric welder no-load breaker device according to claim 2 is characterized in that, is provided with insulated heat cover [7] in the periphery of described control heart yearn [6].

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