초록 ▼

A fluid mixing device has an inlet passageway for connection to a primary fluid supply, an outlet passageway; and at least two separate venturi passageways each connected between the inlet and outlet passageways. Each venturi passageway has a throat portion, a first venturi inlet connected to the th

A fluid mixing device has an inlet passageway for connection to a primary fluid supply, an outlet passageway; and at least two separate venturi passageways each connected between the inlet and outlet passageways. Each venturi passageway has a throat portion, a first venturi inlet connected to the throat portion of the first venturi passageway and a second venturi inlet connected to the throat portion of the second venturi passageway. The first and second venturi inlets are connected to supplies of two different secondary fluids for mixing into the primary fluid, a first one of the secondary fluids being of lower viscosity than the second. The outlet passageway is spaced a predetermined distance downstream of the venturi inlets to prevent substantial backflow of the first secondary fluid mixture into the second venturi passageway prior to mixing together of the two streams in the outlet passageway.

대표청구항 ▼

[ We claim:] [1.]1. A fluid mixing device, comprising:an inlet passageway for connection to a primary fluid supply;an outlet passageway;at least two separate venturi passageways each connected between the inlet and outlet passageways, each venturi passageway having a reduced diameter throat portion,

[ We claim:] [1.]1. A fluid mixing device, comprising:an inlet passageway for connection to a primary fluid supply;an outlet passageway;at least two separate venturi passageways each connected between the inlet and outlet passageways, each venturi passageway having a reduced diameter throat portion, a first venturi inlet connected to the throat portion of a first venturi passageway and a second venturi inlet connected to the throat portion of a second venturi passageway, whereby fluids are drawn into primary fluid streams flowing separately in the first and second venturi passageways;the outlet passageway being spaced a predetermined distance downstream of the venturi inlets to prevent substantial backflow of one of the secondary fluids from one venturi passageway to the other passageway prior to mixing together of the two streams in the outlet passageway; andat least the inlet passageway and venturi passageways comprising a single venturi tube and a septum extending along at least part of the length of the tube and dividing the tube into at least two venturi passageways of non-circular cross-section each having at least one flat wall formed by the septum.