RU2136490C1 - Line for production of superlight foam concrete - Google Patents

Abstract

FIELD: production of mixes of concrete with other materials, in particular, production of superlight foam concrete for heat insulation and for construction purposes. SUBSTANCE: the line has a sand bunker, wet-grinding mill, slime tank, cement bunker, sand and cement batchers consisting of a weight and batch mechanisms, foam generator furnished with metal button-shaped member for dissection of foam, mixer, mainly of the screw-blade type, periodic action, and a mortar pump. EFFECT: obtaining of product with controlled parameters, saving of source material, saving of power resources. 11 dwg

Description

 The invention relates to the manufacture of mixtures of cement with other materials, in particular for ultra-lightweight cellular foam concrete for pipe insulation and for construction purposes.

 In industry, equipment is known for the manufacture of lightweight cellular foam concrete, mixing of the starting materials, which is carried out in a mixer with the supply of foam mass to the place of laying by gravity without proper control by weight and volume.

 The closest analogue of the claimed line is equipment in which the line includes a sand hopper, a wet grinding mill, a slurry pool, a sand dispenser, a cement hopper, a cement dispenser, a foam generator and a mixer, combined by transporting bodies (1). However, this line does not have devices that provide high quality lightweight cellular concrete.

 The objective of the present invention was the manufacture of ultra-lightweight cellular foam and significant savings in raw materials and energy conservation, and the technical result is to obtain a product with controlled parameters.

 The essence of the invention lies in the fact that in the line the dispensers of sand and cement are volumetric and weighted, consisting of weight and volumetric mechanisms, the foam generator is equipped with metal push-button elements for dissecting the foam, the mixer is made mainly of screw-type, periodic action, while the input line is additionally introduced mortar pump.

 The inventive line is illustrated by drawings, where Fig. 1 shows a line, Fig. 2, 2a is a wet grinding mill with grinding elements, Fig. 3 is an analog sand dispenser, Fig. 3a is the same in the invention, Fig. 4 is an analog cement dispenser , figa is the same in the invention, fig. 3 is an analog foam generator, fig. 5a is the same in the invention, fig. 6 is an analog mixer, fig. 7 is the same in the invention.

 The inventive line contains a sand hopper 1 (see FIG. 1), a wet grinding mill 2, a slurry pool 3, a sand dispenser 4, a cement hopper 5, a cement dispenser 6, a foam generator 7, a mixer 8 and a grout pump 9.

 In FIG. 2, in the analogue, balls 10 were used in the wet grinding mill 2, grinding media of a different configuration can also be used in the mill - in the form of elongated cylinders (tsilpebs) 11 (Fig. 2a). In Fig.3, in an analogue, the sand dispenser 4 is made of a cone 12, a conveyor belt 13 with buckets 14 and a hose 15 fixed on it. In the invention, the dispenser is volume-weighted and contains a graduated tank 16, scales 17 and a valve 18 (figa) . In Fig.4, the cement dispenser 6 of the analogue of the cell-blade type includes a shaft 19 with blades 20 mounted on it, in the invention, the volumetric-weight batcher consists of a graduated tank 21, a weight mechanism 22 and a gate 23 (Fig. 4a). In figure 3, the foam generator 7 includes a shaft 24, a metal mesh or plates 25, and in the invention, the end face 26 is made in the form of a mesh and bulk metal elements 27 are button-shaped in the foam generator. In FIG. 6, a continuous analog mixer 8 made from a trough 28, a two-shaft mixer with shafts 29, 30, with blades 31 mounted on the shafts, and the mixer according to the invention comprises a shaft 32 with blades 33 mounted on it (Fig. 6a), i.e. with a screw-paddle stirrer of periodic action.

 The claimed line works as follows.

 To obtain ultralight cellular foam concrete with improved physicochemical characteristics, it is necessary to achieve a more stable and accurate dosage of sand and cement, to achieve better and more uniform mixing of all components of the foamy mass, to streamline the structure and increase the stability of the resulting foam, to ensure a stable prompt supply of freshly prepared mass to the molding place (pouring), including the possibility of supplying the mass to a height of up to 30 m. From the sludge pool 3, where the sludge is continuously bubbled Ama, by air, the sludge flows by gravity into batcher 4, in which high-precision dosing is performed with filling the batcher to a certain level (volumetric dosing) and additionally weighing. Sludge from the dispenser 4 enters the mixer 8, where there is a connection with cement and foam. Cement from hopper 5 is fed through dispenser 6, in which high-precision dosing is carried out according to the dosing principle in dispenser 4. As a result, the dosage accuracy of the components of the foam concrete with a stably set density has improved, the error is ± 1% compared to ± 20% on the previous equipment. Fine-meshed foam is prepared in a foam generator 7 with stable improved properties and structure by mixing a foam concentrate and water in a certain ratio.

 Thus obtained in the mixer 8, the mixture is pumped by pump 9 to the place of molding (pouring).

 In the cement batcher 6 of the old design, the blades 20 quickly wear out, as a result of which an uncontrolled gap is formed between the blades and the batcher body and the exact dosage of cement is not ensured. On the old line, the mixed raw materials arrived unevenly and their mixing time was short, there was no high-quality, thorough mixing of the materials.

 On the claimed line precisely metered materials are mixed until a homogeneous composition, because the mixer design provides continuous turbulent mixing of the foam contained in it.

Sourse of information:
Krasheninnikov A.N. "Monolithic insulation made of cellular concrete and plastics." Leningrad, Publishing House of Literature on Construction, 1971 p. 67-68.

Claims (1)

 A line for the production of ultralight foam concrete containing a sand hopper, a wet grinding mill, a slurry tank, a sand dispenser, a cement hopper, a cement dispenser, a foam generator and a mixer, combined by transporting bodies, characterized in that the sand and cement dispensers are volumetric and weight, consisting of weight and volumetric mechanisms, the foam generator is equipped with metal push-button elements for dissecting the foam, the mixer is made mainly screw, periodic action, while in a line at the exit For further introduced mortar.

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