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Protection device for electric welder

A technology for protection devices and electric welding machines, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as low work efficiency, waste of energy, and welding machine burnout, and achieve the effects of easy maintenance, energy saving, and reliable work

Inactive Publication Date: 2012-02-15
长航集团武汉青山船厂有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The single-head AC welding machine and the multi-head combined AC and straight dual-purpose welding machines used in the factory all have the following defects: when the current is switched on, there is 67V AC or 67V DC from the faucet to the ground, and this voltage exceeds Safe voltage, easy to cause electric shock accidents, consume electric energy and waste energy at the same time; the current is also 7 amperes at no-load, during construction on the ship, if the faucet line is smashed and short-circuited to the ground, it will be short-circuited to the ground for a long time without anyone knowing. Causes the burnout of the welding machine; and the arc start before entering the work is very slow, and the work efficiency is low

Method used

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  • Protection device for electric welder
  • Protection device for electric welder

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0022] Such as figure 1 The welding machine protection device shown includes control arc starting relay JC1, no-load protection relay JC2, faucet line grounding protection relay JC3, time relay SJ, start button SA, main power contactor JC and control transformer BK; the control transformer BK is connected in parallel At the two input terminals of the electric welding machine DH, the start button SA, the normally closed contact of the time relay SJ, and the coil of the control arc starting relay JC1 are connected in series to the output circuit of the control transformer BK; the normally open contact of the no-load protection relay JC2 The coils of the point and time relay SJ are connected in series, and are connected in parallel with the two ends of the circuit connected in series with the normally closed contact of the time relay SJ and the coi...

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PUM

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Abstract

The invention discloses a protection device for an electric welder. The protection device comprises a control arcing relay, an idle protection relay, a bibcock wire grounding protection relay, a time relay, a starting button, a main power supply contactor and a control transformer. By controlling the normally opened contacts and normally closed contacts of the relays and a contactor and the on / off state of a coil, the electric welder DH can exert a protection function in three states, namely control arcing state, idle state and bibcock wire grounding state. by the adoption of the protection device, idle current and voltage of the welder are reduced; energy is saved; work is reliable; a fault is easily searched when the fault occurs; and the protection device is convenient to maintain and is suitable for various electric welders.

Description

technical field [0001] The invention relates to an electric welding machine, in particular to the no-load protection, control arc protection and tap-to-ground short circuit protection device in the electric welding machine. Background technique [0002] The single-head AC welding machine and the multi-head combined AC and straight dual-purpose welding machines used in the factory all have the following defects: when the current is switched on, there is 67V AC or 67V DC from the faucet to the ground, and this voltage exceeds Safe voltage, easy to cause electric shock accidents, consume electric energy and waste energy at the same time; the current is also 7 amperes at no-load, during construction on the ship, if the faucet line is smashed and short-circuited to the ground, it will be short-circuited to the ground for a long time without anyone knowing. Cause the burning of the welding machine; and the arc starting before entering the work is very slow, and the work efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10
Inventor 刘章启杨诗豹吴汉文习天双李国祥杨元金
Owner 长航集团武汉青山船厂有限公司
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