The invention belongs to the technical field of material
length measurement, and particularly relates to an anti-blocking
pipe operation control method and device in the positive-pressure dense-phase pneumatic transportation process.
Compressed air is introduced into a conveying pipeline of a conveying
system, feeding is conducted, then pulse
airflow is introduced into the conveying pipeline, so that materials form a material plug and flow, and when the length of the material plug exceeds a preset maximum value, an anti-blocking
control logic module is started; the
pulse frequency of the pulse air, the conveying flow of the
compressed air and the feeding rate of the conveying
system are sequentially increased, so that the length of the material plug is adjusted, and in each step, when the length of the material plug is reduced to be below the preset maximum value, the anti-blocking
control logic module is closed, and the effect cannot be achieved, an alarm is given. Based on precise control of the material plug length, the problem that plug flow is prone to being blocked in the conveying process is effectively solved, the operation stability of a plug flow pneumatic conveying
system is improved, the
pulse frequency, the conveying
air volume and the feeding rate are controlled step by step, and the remarkable energy-saving effect is achieved.