Continuous conveying process and device for shear-sensitive fluids
OwnerPeter Jahn, Otto Schmid +1inventors
InventorsPETER JAHN, OTTO SCHMID, ADOLF SCHMIDT
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Abstract
The invention relates to a process for continuously conveying shear-sensitive fluids, in particular polymer latices or plastics dispersions, which is accompanied by the taking of samples and the processing and analysis thereof, to a device for implementing the process and to a new double-long-stroke reciprocating pump.
Claims12
Process for continuously conveying shear-sensitive fluids having a viscosity of up to 100,000 mPa.s with a pump capacity of 10 ml/h to 100 l/h, characterised in that the fluid is aspirated via at least one clearance-free, positive valve (4) by a piston (8) of a double-long-stroke reciprocating pump (3) while fluid is synchronously emitted by the second piston (9) from the second piston chamber (24) likewise via at least one additional clearance-free, positive valve (5) towards the conveying side and after total evacuation of the second piston chamber (24) the valve (4) is opened on the emission side and closed on the suction side while valve (5) is closed on the emission side and opened on the suction side and the direction of motion of the pistons (8, 9) is synchronously reversed, whereby the pistons (8) and (9) are located on a spindle (14).
Low-pulsation, clearance-free, double-long-stroke reciprocating pump with a pump capacity of 10 ml/h to 100 l/h for conveying shear-sensitive fluids having a viscosity of up to 100,000 mPa.s, exhibiting two pistons (8, 9) on a common drive spindle (14), an angle-stroke gearing (10) with control gearing (11) connected upstream for driving the pistons (8, 9), a ring (12) for adjusting the stroke volume of the pump heads (23, 24), a contact switch (26) for changing the direction of rotation, an initiator disc (27) and also double seals on the head of the pistons (23, 24).
Dependencies are inferred from the claim text.