Electric control circuit of air compressor for salt bag packing machine

Abstract

The invention relates to an air compressor electric control circuit for a salt bag packing machine. The air compressor electric control circuit for the salt bag packing machine comprises a plurality of air compressor circuit bodies which are sequentially connected with power leads. Each air compressor circuit body comprises an air switch QF connected with a power source and an alternating current contactor KM connected between the air switch QF and a motor M, and a safety resistor RF is connected between the alternating current contactor KM and the motor M. A time relay KT is arranged in each air compressor circuit body. A pressure switch K is arranged on each air compressor circuit body. The pressure switch K of the front air compressor circuit body is sequentially connected with the time relay KT of the back air compressor circuit body. The effect that an air compressor operates efficiently and orderly is ensured through the time relays KT and the pressure switches K which are arranged additionally.

Description

technical field [0001] The invention belongs to the field of a salt bag packaging production line, and relates to an air compressor for supplying air to pneumatic components of a salt bag packaging machine, in particular to an electrical control circuit for the air compressor used in a salt bag packaging machine. Background technique [0002] Air compressor is also called air compressor. The air compressor in the salt bag packaging production line is mainly a piston air compressor. Its working principle is to compress its own air into compressed air through the change of volume, and then deliver the compressed air to the salt bag packaging The pneumatic components of the production line, such as the cylinder brake unit of the salt bag automatic packaging machine, can then complete the packaging work of the automatic packaging machine. [0003] The salt bag packaging production line needs multiple air compressors to supply air, generally four are arranged in sequence. Due to ...

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Problems solved by technology

In this way, at the lowest end of the pressure of the air storage tank of the air compressor, that is, when the second air compressor is just started, the cylinder of the automatic packaging machine is unable to operate, which will cause the cylinder of the packaging machine to not move the operation of the actuators such as the cutting mechanism. , resulting in the inability to complete the cutting of the belt cutting salt bag, which in turn leads to the phenomenon of waste

In addition, the first air compressor is always running, the running time is long, the temperature is high, and carbon deposits are prone to occur. If the carbon deposits are serious, further cylinder scuffing will occur, so the air compressor head needs to be replaced frequently

[0004] To sum up, the disadvantages of the electrical control circuit of the existing air compressor for salt bag packaging machine are: 1. Just after the power is turned on, several air compressors (generally four) start at the same time and run, and the instantaneous starting current is large, which is harmful to the trunk The impact is large and the voltage fluctuates greatly; 2. Only one or two air compressors in the previous sequence start to run, and the two air compressors in the subsequent sequence are basically in a shutdown state. The temperature of the air compressor head that has been working in the previous sequence is too high. The carbon deposit is serious, the cylinder head is easy to pull, and the head of one or two air compressors in the previous sequence is often damaged and needs to be replaced frequently; 3. The air pressure of the air storage tank of the air compressor is periodically low, which affects the pneumatic operation of the automatic salt bag packaging machine The components are running normally; 4. The operation of each air compressor is controlled by its own pressure switch, and the control is not coordinated

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