Automatic dredging method and device for pneumatic convey system

Abstract

The invention relates to a method for automatically releasing blocks via air-powered transport system and relative device. Wherein, it comprises a pressure container, a PLC control system, several valves, tubes, lead wires and sensors; the PLC control system according to the pressure change of transport tube judges if the transport tube is blocked; and via the operation of PLC control system, it charges and pressurizes the transport tube, and discharges the pressure container, to loose the block inside the tube. The invention can automatically judge the block condition and release block, in short time, to improve the producing efficiency the reliability. Therefore, it can be used in air-powered transport system.

Description

Technical field: [0001] The invention relates to an automatic blockage removal method and device for conveying materials with compressed air after blockage occurs. Background technique: [0002] In many industrial places, it is necessary to blow solid powdery or fine particle materials with compressed air. Such a system generally consists of a pressure vessel, a pipeline, corresponding valves, and a PLC (programmable logic controller) control system. During the material conveying process, due to the fluctuation of the compressed air pressure, or the wet agglomeration of the material, the impurity in the material, etc., the material often accumulates in a certain part of the pipeline, forming a section of embolism and causing the conveying pipe to be blocked. [0003] After material blockage occurs in the system, the general blockage removal method is to temporarily close the discharge valve and injection valve, let the auxiliary blow valve keep pressurizing the pipeline, and...

AI Technical Summary

Problems solved by technology

[0004] ① Can not rule out all blocking faults

The blowing aid valve keeps pressurizing the pipeline, so that the material in the plugging section is always under positive pressure. For the material with serious plugging, the plugging will become tighter and tighter, making the blockage more serious. Finally, the pipeline can only be dismantled manually

[0005] ②The operation of beating the pipe is very irregular

Such knocking will cause great damage to the pipeline, and it is easy to deform and crack the pipeline. This behavior should be prohibited in normal production.

[0006] ③Increasing hidden dangers of personal accidents

Many parts of the pipeline are installed underground or high above the ground. When the material is seriously blocked, it is very dangerous for workers to beat or disassemble the pipeline, which virtually increases the hidden danger of accidents in terms of personal safety.

[0007] ④Troubleshooting takes a long time, affecting normal production

After many times of actual use in multiple production sites, it was found that the blockage removal time is quite long. If the pipeline needs to be disassembled, the troubleshooting time will be longer, and even lead to the shortage of raw materials in the next production process.

[0008] ⑤ Manual intervention must be used to remove the blockage, and automation cannot be realized

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