SU153203A1 - - Google Patents

Description

Installations for the continuous preparation of foam concrete are known, including a mixer, a foam beater and dispensers.

The proposed plant for the continuous production of foam concrete during the manufacturing process ensures a constant bulk density of the foam concrete mass and improves its quality.

To achieve the goal, the installation is supplied with a sludge dosing unit, and its foam blower is supplied with a float device and a foam separator with a drive.

FIG. 1 shows schematically the described installation; in fig. 2 - foam blower with a float device and a foam divider with a drive, in two projections.

The plant for the continuous production of foam concrete includes a foam beater /, a mixer 2, a cement dispenser 3, a slurry dispenser 4 and a water dispenser 5.

A foam (pneumatic type), the body of which has a cylindrical shape, is equipped with a float device 6, a foam divider 7 with an actuator 8 and a device for air supply (not shown in the drawing). The float device maintains a constant level of foam, and the divider, which is a mesh blade driven by the actuator 8, crushing the foam,

The foaming emulsion of the previously prepared concentration enters the body of the foam compressor until the inlet opening is closed by the float device 6. Compressed air enters the foam compressor from the compressor (not shown) through the pipeline and perforated nozzles. The air flow is controlled by a rotameter I installed on the pipeline. Moving compressed air with a foaming emulsion causes a foaming process. The foam after filling the housing enters the foam divider 7, in which, when the mesh blades rotate, it acquires a finely cellular structure. The finished foam flows out of the dissector through the drain pipe 10 and enters the mixer 2. The operation of the foam sucker is controlled smoothly and in a wide range by changing the air flow rate, as indicated by the rotameter 9.

Mixer 2 is a trough-shaped two-shaft stirrer with continuous screw blades rotating towards one another (not shown in the drawing). From above, the mixer body is tightly closed with lids. A water distribution chamber with a solenoid valve // and a charging funnel 12 is mounted at the loading location of the casing of the casing. The funnel has a flange on top for fastening the transition chute 13

from cement dispenser 3 and a hole for receiving sludge. In the lower part of the mixer housing there is a nozzle 14 for dispensing the finished foam concrete mass.

A cement dispenser 3 (cellular type) consists of a feeder in the form of a rotating rotor 15, a signaling device 16 located under it, and a drive 17 of the feeder.

The signaling device is intended to signal in the event that cement drops to the dosing unit (hovering in a hopper, etc.). On the octagonal surface of the rotor shaft, eight plates are fixed, directed tangentially to it. The speed of rotation of the rotor is regulated steplessly by means of a chain variator (not shown in the drawing).

The sludge from the dispenser 4 is fed to the mixer through a pipe 18. In the casing cover of the dispenser 4 there is a receiving pipe 19 and two contacts 20 intended to limit the upper and lower levels of the slurry located in the dispenser housing. The drive drum rotates from the electric motor 21 with a worm gear and a chain drive. Its speed varies infinitely with the help of a chain variator (not shown in the drawing).

The mouth of the system is as follows.

The foam beater is turned on, and after foam starts to flow through the hose into the mixer, all other nodes are simultaneously turned on: cement mixer and dispenser, sludge dispenser 4 and water dispenser 5. The cement-sand mortar is prepared in the mixer at the site from the point where the water, sludge and cement are supplied to the place of supply of foam. In the second section of the mixer, the solution is mixed with the foam and a foam concrete mass is formed, which is continuously fed through the mixer nozzle 14 for pouring into the molds.

The installation is controlled from a common console.

Subject invention

An installation for the continuous preparation of foam concrete, comprising a mixer, a foam beater and dispensers, characterized in that, in order to obtain a high-quality foam concrete mass, it is equipped with a sludge metering device, and a float device and a foam separator with a drive are mounted in its foam beater.