SU916332A1 - Plant for activating cement suspension - Google Patents

Description

The invention relates to construction equipment, in particular to installations for the activation of cement and the production of water-cement slurry for the preparation of concrete mix.

Known installation for the activation of cement, containing sealed containers, installed one above the other with mounted in them hydrating, connected with sources of vacuum and pressure [1].

Closest to the Offered is an installation for activating a cement suspension, containing a frame mounted on shock absorbers with vibrators and a container placed on it in the form of communicating with the atmosphere through shut-off edges. New hermetic sections, connected respectively with the sources of vacuum and pressure, and the radiator [2].

The disadvantages of the known devices is the low degree of activation and complexity of the design.

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The purpose of the invention is to increase the degree of activation and simplify the design.

This goal is achieved by

⁵ that an installation for activating a cement suspension containing a frame mounted on shock absorbers with vibrators and a container placed on it in the form communicated with the atmosphere

¹⁰ by means of shut-off valves of sealed sections, connected respectively with sources of vacuum and pressure, and the emitter, equipped with a PTFE tube with

^{15 with a} valve at the end, the container is made i-shaped with a through hole in the knee, the emitter is in the form of a piezoelectric transducer covering the tube, the latter passing through the opening of the knee and the free end connected to the top of the section connected to the vacuum source.

916332

The drawing shows the installation

to activate cement.

The plant for cement activation consists of an İ-shaped container consisting of a left section 1 and a right · section 2, which is filled with a water cement suspension 3 provided with a left sealing lid 4 with a pipeline 5 For connection with a vacuum pump (not shown), a cork valve 6 and a branch pipe 7 for the Connection with the atmosphere, as well as with the pipeline 8 connected to the mortar mixer (not shown) and the cork valve 9 · The pipeline with the cork valve 11 is mounted on the right sealing lid 10 (Pipe 12 for connection to the atmosphere and pipe wire 13 connected to a compressor (not shown).

In the hollow interior of the tank polytetrafluoroethylene tube 14 is installed with a cylindrical piezo emitter 15, a drain pipe 16 and a cork cock 17.

A container with devices is mounted inside a space frame 18, equipped with two vibrators 19 horizontal vibrations, a vibrator 20 vertical vibrations, and mounted on shock absorbers 21. ‘

The installation works as follows.

8 section 1 through the pipeline 8 and the valve 9 is injected with a water-cement slurry 3, which fills the left and right sections 1 and 2 and is installed at the same level when the valves 6 and 11 are in position to connect the sections with the atmosphere. After filling the tank with the valve 6, the pipe 7 is blocked and the pipeline 5 is connected to the vacuum-forming devices, and the vibrators 19 and 20 are simultaneously turned on.

Under the action of vibration and vacuum, all types of air (dissolved, adsorbed and mechanically trapped) are removed.

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Under the action of increasing pressure difference, vacuum in section 1 and atmospheric pressure in section 2 (at this position of the crane 11, when section 2 is connected to the atmosphere), the level of suspension 3 shifts towards vacuum and the water-cement mixture falls into polytetrafluoroethylene

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tube 14, where using a cylindrical piezo emitter 15 is exposed to an intense ultrasonic field. At the same time, the speed of movement is insignificant, since the suspension 3 moves from vacuum to atmospheric pressure due to the pressure difference (the volumetric mass of the plant operators is 1.0 g / cm '

ment 3.1 g / cm ^3, at a ratio of 1: 1 the average bulk density is 2.05 g / cm ⁵⁾ generated by downward bulk density and height of the column and below the up - atmospheric and vacuum pressure differential over the suspension in sections. To enable the movement of the suspension 3, the valve 17 opens. It also serves as a regulator of the speed of movement of the water-cement suspension, at which the maximum possible destruction of cement particles is achieved.

At a certain moment of activation of cement, the difference in pressure (vacuum and atmospheric) is not enough to provide the required level of suspension, then an increased regulated pressure is connected with the crane 11 and pipeline 13, which provides a further increase in the level to certain limits, then the vibrators are turned off, the valve 17 is blocked 21 and valve 6 pipe 7 is connected to the atmosphere. A similar connection with the atmosphere is made by the valve 11 and the pipe 12 with the simultaneous shut-off of the pipeline 13 · The residual suspension lowers and takes a horizontal position. The valve 9 is opened and a new portion of the water-cement slurry 3 is supplied to the tank through the pipeline 8. After the tank is filled with the valve b, the nozzle 7 is blocked, the pipeline 5 is connected to the vacuum pump and the vibrators 19 and 20 are turned on, i.e. activation process is repeated.

In the process of activation, the water-cement slurry heats up from 35 to B0 ^ C (depending on the speed of its movement), however, due to the fact that the pipe 16 to remove the activated water-cement slurry 3 after the PTFE tube 14 runs through the lower part of the tank, the water-cement slurry and serves coolant.

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At the end of the work, the residual water-cement suspension is drained through the valve 22 and the pipe 23.

In the proposed installation increases the degree of activation and eliminates the need for pipelines connecting tanks.

Claims (1)

Claim Installation for the activation of cement slurry, containing a frame with vibrators mounted on shock absorbers and a container placed on it in the form of airtight sections communicating with the atmosphere through shut-off valves connected respectively to vacuum and pressure sources, and an emitter differing from 916332 6 that, in order to increase the degree of activation and simplify the design, the installation is equipped with a PTFE tube with a valve at the end, 5, the container is made 11-shaped with a through hole in the knee, the radiator is in the form of a piezoelectric transducer covering the tube, the latter passing through the “0” opening of the knee and connected to the upper part of the section connected to a vacuum source with a free end.