Plug type pneumatic conveying control system null of powder

摘要

PURPOSE: To provide a plug transport control system of power/grain which can prevent crushing and segregation of powder/grain preventing a blow-by phenomenon and performing stable plug transport. ;CONSTITUTION: Based on output voltage of an acoustic sensor 7 fitted to the terminal end of a transport pipe 3, a first opening/closing valve 43 controlling supply of primary air, a second opening/closing valve 53 controlling supply of secondary air, a third opening/closing valve 63 controlling supply of tertiary air, and an exhaust valve 12 controlling exhaust of a blow tank 1, are controlled by means of a control device 8 so that the flow speed grain/powder is maintained within a fixed range.;COPYRIGHT: (C)1996,JPO