阅读说明：本技术 交流电焊机空载时间限制系统 (No-load time limiting system of alternating current welding machine ) 是由 陈俊 叶佳漪 夏明� 朱竑 郑运洪 张晓峰 于 2020-07-31 设计创作，主要内容包括：公开了一种交流电焊机空载时间限制系统,包括带控制开关电焊把和接触器KM,所述接触器KM的线圈和所述控制开关串联在电焊机控制回路中,所述接触器KM的主触头串联在电焊机的主回路上。按下所述电焊把上的所述控制开关时,所述接触器KM的所述线圈的安全电压接通,实现手动唤醒电焊机。松开所述电焊把上的所述控制开关时,所述接触器KM的所述线圈的安全电压被切断,实现手动切断电焊机电源,电焊机停止工作。通过带所述控制开关的所述电焊把可灵活控制电焊机开机和停机。避免了电焊机接通电源后焊工长时间不进行不焊接作业,消耗空载电流造成电力浪费的问题。(The system comprises an electric welding handle with a control switch and a contactor KM, wherein a coil of the contactor KM and the control switch are connected in series in a control loop of the electric welding machine, and a main contact of the contactor KM is connected in series in a main loop of the electric welding machine. When the control switch on the electric welding handle is pressed down, the safe voltage of the coil of the contactor KM is switched on, and the electric welding machine is manually awakened. When the control switch on the electric welding handle is loosened, the safety voltage of the coil of the contactor KM is cut off, so that the power supply of the electric welding machine is manually cut off, and the electric welding machine stops working. The electric welding machine can be flexibly controlled to start and stop through the electric welding handle with the control switch. The problem of electric power waste caused by idle current consumption because a welder does not perform non-welding operation for a long time after the electric welding machine is powered on is avoided.)

1. A dead time limiting system of a welding machine is characterized by comprising a welding handle with a control switch and a contactor KM, wherein a coil of the contactor KM and the control switch are connected in series in a control loop of the welding machine, and a main contact of the contactor KM is connected in series in a main loop of the welding machine.

2. The power control system for a welding welder of claim 1, wherein the control switch is a long handle push-down switch.

3. The power control system for a welding machine of claim 1 wherein a circuit breaker QF1 is connected in series with the primary circuit.

4. The power control system of a welding welder of claim 1, characterized in that a circuit breaker QF2 is connected in series on the control.

Technical Field

At least one embodiment of the present disclosure is directed to an ac welder dead time limiting system.

Background

In engineering construction, the electric welding machines are one of the most common devices, and even hundreds of electric welding machines work simultaneously in some large steel structure projects. The electric welder utilizes the high-temperature electric arc generated by the instantaneous short circuit of the positive and negative poles to melt the welding flux and the welded material on the welding rod, thus achieving the purpose of welding. The instantaneous short circuit current generated by the electric welding machine is large, and the electric welding machine is a large power consumer in a construction site. A single electric welding machine is large in size and weight and inconvenient to move, most electric welding machines are arranged beside a temporary power distribution box in a centralized mode, and electricity is obtained in the temporary power distribution box in the centralized mode. The intermittent welding is the biggest characteristic of the electric welding machine in use, and when meeting the situations that a welder performs welding at a high place, or has a rest on the way of welding, or waits for the completion of the previous process and the like, the welder is inconvenient to shut down, but the electric welding machine can be caused to have no load for a long time, and the electric quantity is wasted. In addition, if the electric welding machine is not turned off, electric shock is easy to occur when the electric welding rod is replaced in a humid environment or under the condition that a body sweats.

Disclosure of Invention

At least one embodiment of the present disclosure provides an alternating current welding machine dead time limiting system, through this system can let the alternating current welding machine shut down at any time to can manually awaken up the electric welding machine at any time, avoid the welder not carrying out the non-welding operation for a long time after the electric welding machine switches on, consume the problem that no-load current causes the electric power waste, reach the purpose that reduces engineering cost and improves engineering benefit. In addition, through this disclosed alternating current welding machine dead time limit system, trade the danger that the electric welding rod can not take place to electrocute under the electric welding machine power failure state, guarantee electric welder personal safety.

At least one embodiment of the present disclosure provides a welding machine dead time limiting system including a welding handle with a control switch and a contactor KM, a coil of the contactor KM and the control switch being connected in series in a welding machine control loop, and a main contact of the contactor KM being connected in series in a main loop of the welding machine.

In some examples, the control switch is a long handle push down switch.

In some examples, a circuit breaker QF1 is connected in series with the main circuit.

In some examples, a circuit breaker QF2 is connected in series with the control.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below.

Fig. 1 is a circuit diagram of a power control system of an ac welding machine according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram of an ac welding machine according to an embodiment of the present disclosure.

Detailed Description

As shown in fig. 1 and 2, the ac welding machine dead time limiting system comprises a welding handle with a control switch and a contactor KM, wherein a coil of the contactor KM and the control switch are connected in series in a welding machine control loop, and a main contact of the contactor KM is connected in series in a main loop of the welding machine. Wherein the control switch may be a long handle push down switch. The main circuit is connected with a breaker QF1 in series, and the control circuit is connected with a breaker QF2 in series.

The power supply of the alternating current welding machine is switched off and on through the contactor KM. When the long handle press switch (contactor switch) on the electric welding handle is pressed down, the 24 volt-ampere full voltage of the coil of the contactor KM is switched on, and the electric welding machine is manually awakened. When the long handle push-down switch on the electric welding handle is released, the 24 volt-ampere full voltage of the coil of the contactor KM is cut off, the power supply of the electric welding machine is manually cut off, and the electric welding machine stops working. The electric welder can flexibly control the start-up and the stop of the electric welder through the electric welding handle with the control switch.

The use method of the electric welding machine with the open AC electric welding machine dead time limiting system comprises the following steps:

step 1, switching on the circuit breaker QF1 in the main circuit and the circuit breaker QF2 in the control circuit.

And 2, pressing the control switch on the electric welding handle to close the control switch, electrifying the coil of the contactor KM, attracting the main contact of the contactor KM to electrify the electric welding machine, and enabling the electric welding machine to be in a no-load standby state at the moment so as to carry out welding operation.

And 3, loosening the control switch on the electric welding handle to disconnect the control switch, powering off the coil of the contactor KM, powering off the electric welding machine when the main contact of the contactor KM is disconnected, and at the moment, the electric welding machine is in a shutdown state, so that a welder can take a rest slightly, or wait for the completion of the previous procedure, or change welding rods and knock welding slag.

And 4, disconnecting the circuit breaker QF1 in the main circuit and the circuit breaker QF2 in the control circuit when the welding machine is not used any more after the welding operation is finished.

The method can flexibly control the starting and stopping of the alternating current welding machine under the condition of not changing the welding habit of the electric welder and the performance of the electric welding machine, reduces the engineering cost, improves the engineering benefit and can also ensure the safety when the electric welder changes the welding rod.