Loading patent…
AssigneeDosatron International
InventorsSebastien Furet, Sandrine Lambinet, Philippe Duquennoy, Manal Badii
Estimating the term…
Metering device for introducing a liquid additive into a main liquid flowing along a pipe, includes a pump for withdrawing additive from a container and metering it, this pump including a first inlet for receiving a flow of main liquid which drives the pump, a second inlet for picking up additive and an outlet for the resulting mixture; a Venturi installed in the pipe, and connected in parallel with the pump, the first pump inlet connected by a first line to the Venturi inlet while the outlet connected by a second line to the Venturi throat; a first element for varying the restriction at the Venturi neck, and a second element sensitive to the pressure drop across the pump for controlling the first element to reduce the bore section when the pressure drop across the pump increases, and increase the bore section when the pressure drop across the pump decreases.
A metering device for introducing a liquid additive into a stream of main liquid flow flowing in a pipe, the device comprising a reciprocating differential piston pump (3) for taking up the additive in a container and metering the additive, this pump comprising a first inlet (8) for receiving the main liquid flow that drives the pump, a second inlet (9) for taking up the additive and an outlet (10) for mixing the additive and the main liquid, the device comprising a first Venturi channel (11) arranged in the pipe, the pump (3) being connected in parallel with the first Venturi channel (11), the first inlet (8) of the pump being connected via a first line (12) to the inlet of the first Venturi channel while the outlet (10) of the pump is connected via a second line (13) to a throat (11c) of the first Venturi channel, wherein the device comprises:
Dependencies are inferred from the claim text.