DEVICE FOR PREPARATION OF BUILDING FOAM Russian patent published in 2003 - IPC

FIELD: construction, in particular, devices for preparation of building foam in production of foam materials. SUBSTANCE: the device has a working chamber in the form of a pipe with an outlet pipe connection and nets with a filled cap of mass transfer bodies placed between the latters, connected to the outlet side of the chamber of preliminary mixing, having from the inlet side pipe connections for delivery of the solution of foam generator and compressed air. The cap in the working chamber is positioned in a continuous layer. The mass transfer bodies in the mentioned cap are made in the form of nozzles, having axially symmetric forms of the Laval nozzle or contraction conjugate to the cylinder. The chamber of preliminary mixing has the shape of a cylinder with a pipe connection for supply of compressed air coaxially positioned in its inlet end. The inlet pipe connection for supply of foam generator is made in the form of an injector and positioned in the middle part of the mentioned chamber. EFFECT: reduced power consumption for foam generation, maximized foam multiplicity and its homogeneity. 7 cl, 4 dwg