RU2115552C1 - Foam generator - Google Patents

Abstract

FIELD: construction machinery and equipment. SUBSTANCE: this is used for obtaining foam mass in producing foam concrete or similar combinations used in construction and other industries. Cylindrical covers in foam generator are secured at both sides of electric motor and are made in the form of sleeves. Secured in each sleeve on end portions of electric motor shaft are working members in the form of turbo-propellers with internal perforated blades which are stationary fastened to side walls of external propeller blades. Foam discharging pipe unions can be made of steel pipe elbows fastened above cylindrical covers. Aforesaid embodiment adds reliability and longevity to foam generator. EFFECT: higher efficiency. 4 dwg

Description

 The invention is intended primarily for the mass preparation of foam from a serial domestic foaming agent such as "Morpen" or the like, for the mass production of foam concrete or similar compositions widely used in construction, chemical and other industries.

 The closest analogue is a foam generator of the type "PG", containing a working body fixed to the motor shaft, a cylindrical cover, pipelines for supplying a foaming agent and air, and a foam nozzle [1].

 The working bodies are rotatable and fixed disks with fingers concentrically attached to them with threaded ends and nuts with a central supply of a foaming agent between them, which is converted into foam mass, displaced by about a 10-fold increase in the volume of the foaming agent into the foam outlet. The undoubted advantages of a finger foam generator include its relatively low metal and energy consumption with high laboriousness in the manufacture of fingers and their threaded fastening manually, which does not guarantee their spontaneous unscrewing and does not exclude emergency failures, since even one “finger” seizes the rotatable disk, and current protection does not have time to operate and does not exclude the burning of windings, which are often the cause of emergency situations.

 The objective of the invention is to provide high reliability and durability while increasing productivity.

 The problem is solved due to the fact that the foam generator type "PG", containing a working body mounted on the motor shaft, a cylindrical cover, a foam and air supply piping, and a foam spout, is equipped with an additional cylindrical cover with a foam and air supply pipelines, a foam spout and a worker body, while the cylindrical covers are fixed on both sides of the electric motor and are made in the form of glasses, in each of which at the end sections of the electric motor shaft For axisymmetrically and rigidly fixed working bodies made in the form of turbopropellers with internal perforated blades fixedly attached to the side walls of the external propeller blades, the foam extending nozzles are made, for example, of steel tubular elbows mounted on top of cylindrical covers and at their opposite ends fixed, for example, rubber-fabric sleeves supplying foam mass to the foam-using unit.

 The controlled supply of the foaming agent is carried out in the form of thin jets, crushed into small droplets by turbopads and squeezed into thin films by turbo-blades, which, due to surface tension forces, are folded into spheroidal cavities filled with air, which is sucked through holes in the end walls of cylindrical covers or in the form of compressed air, a foaming agent with an approximately seventy-fold increase in its volume, and which is self-displaced from the cylindrical caps through openings in their hnih parts in penovydayuschie pipes welded to the lids on top. In this case, the working bodies in the form of rigid and geometric unchanged spatial structures such as turbopropellers provide reliability and durability with an increase in the yield of foam mass, i.e. more than 2 times the productivity of the foam generator due to the intensification of the treatment of the blowing agent with turbopropellers.

 In FIG. 1 shows a General view of the foam generator; in FIG. 2 is a section AA in FIG. one; in FIG. 3 - section BB in FIG. one; in FIG. 4 is a section BB of FIG. 3.

 Foam type "PG" includes foam nozzles 1, the end walls 5 of the cylindrical covers 6, interconnected with the electric motor 10 "through" tie rods 2, the pipe 3 with an adjustable supply of foaming agent, injection nozzles 4 with supply hoses 7, a terminal box 8 with a power cable 9 , the motor housing 10 with the rotor 12 and the stator 11, the shaft 22 and the bearings 13, as well as the side walls of the electric motor with o-rings 14, for example fluoroplastic; turbopropeller working bodies (see Figs. 2-4) with internal perforated blades 15 fixedly attached to the side walls of the external paired and opposed propeller blades 17 and bushings 23 rigidly fixed to the end sections of the shaft 22 of the electric motor 10, for example, “through screws” 19 with nuts 20 or limited by lateral displacement by segment keys 21.

 The foam generator works when the electric motor 10 is turned on and the blowing agent is supplied by a pipe 3 with pneumatic pipes 4 through the end walls 5 and through coaxial holes of small diameters (8-15 m) with air suction in the form of thin jets under the external blades 17, which then fall in the form of small drops onto the blades 15 are internal and perforated, which they flatten into thin films, rolled into spheroids, and forming a foam mass with an approximately seventy-fold increase in volume and its self-displacement into foam dispensing tubes 1.

 Since the turbopropeller working bodies form spatially unchanged structures, even with spontaneous unscrewing of the nuts 20 and the screw 19 falling out at full speed, the accident is practically eliminated, since the nuts or screw will not be able to jam due to the large gaps between the blades and the covers, and the operator will forced to do a routine inspection and fix them in place. There is also the option of fixing the bushings on the motor shaft by means of conventional prismatic or segment keys 21, eliminating even the hypothetical possibility of self-unscrewing.

Claims (1)

 A "P" type foam generator containing a working body fixed to the electric motor shaft, a cylindrical cover, foaming agent and air supply pipelines and a blowing nozzle, characterized in that it is equipped with an additional cylindrical cover with a foaming agent and air supply pipelines, a foaming nozzle and a working body, cylindrical covers are fixed on both sides of the electric motor and are made in the form of glasses, in each of which axially symmetrically and rigidly on the end sections of the electric motor shaft to which the working bodies are fixed, made in the form of turbopropellers with internal perforated blades fixedly attached to the side walls of the external propeller blades, the foam extending nozzles being made, for example, of steel tubular elbows mounted on top of cylindrical covers, and fixed at their opposite ends, for example , rubber-fabric sleeves supplying foam mass to the foam-using unit.

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