SU1199251A1 - Apparatus for generating froth - Google Patents

Abstract

1. DEVICE FOR FORMATION OF MECHANICAL FOAM, comprising a cylindrical mixing chamber with end walls, one of which has an outlet opening, a branch pipe tangentially attached to the chamber surface for supplying a frother, coaxially coaxially with the displacement chamber, the diameter of which is smaller than the diameter of the displacement chamber, and means for supplying air, characterized in that, in order to increase the multiplicity of foam, the mesh is installed inside the displacement chamber between its end walls, and the means for supplying Ear communicated with the cavity between the inner chamber surface and an outer surface mesh. 2. An apparatus according to claim I, characterized in that the means for supplying air is integral with the nozzle for supplying the frother.

Description

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SP of FIG. 1 The invention relates to a device for producing mechanical foams and can be used in fire fighting equipment, as well as in public households, where the foam is used for dust suppression. inventions - increase of short foam. FIG. I shows the device, the sales section; in fig. 2 - section A-A k & FIG. 1. i Ustr, ostvlL | mechanical formation. CONDER {Foam) cylindrical mixing chamber 1 with end walls 2 and 3. The end wall 3 has an outlet opening 4. To the mixing chamber 1, a nozzle 5 is fixed tangentially mounted to the surface of the chamber to supply a blowing agent and air. Inside the mixing chamber 1, between the end walls 2 and 3, a cylindrical mesh 6 is coaxially arranged with the chamber. The device operates as follows. The mixture of gas and leaking fluid is fed through pressure through the nozzle 5 into the cylindrical mixing chamber 1. Due to the difference in gas density and liquid density, Vras, Ayush, ikhs in chamber 1, the two-phase flow is divided into two layers: an external, adjacent to the wall two-phase dynamic layer, and an internal, washing the cylindrical grid 6 gas-droplet layer. Drops, interacting with the cylindrical grid 6, a part of the liquid moisten its holes. The remaining mass of liquid from the droplet, moving by inertia, returns to the flow and re-participates the wetting process of the cylindrical grid 6. The gas passing through the holes in the cylindrical grid moistened with foaming liquid blows bubbles on the inside of the grid hole 4 is retracted from the device.

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Claims (2)

1. DEVICE FOR FORMING MECHANICAL FOAM, containing a cylindrical mixing chamber with end walls, one of which has an outlet, tangentially mounted to the surface of the chamber pipe for supplying a foaming agent, a cylindrical mesh coaxial with the mixing chamber, the diameter of which is smaller than the diameter of the mixing chamber, and means for supplying air, characterized in that, in order to increase the multiplicity of the foam, the mesh is installed inside the mixing chamber between its end walls, and the means for supplying air with obscheno with the cavity between the inner surface of the chamber and the outer surface of the mesh. 2. The device according to π. 1, characterized in that the means for supplying air is made integral with the pipe for supplying a foaming agent.