SU1339028A1 - Powder dispenser - Google Patents

Abstract

The invention relates to devices for activating cement and obtaining a cement slurry and will allow for an intensification of the dispersion process. The disperser contains an airtight container 1 mounted on the shock absorbers 2 with the clamps 6, the bottom 9, a device for dispersion

Description

Research institutes and cavitations, connection pipe 5 with a vacuum system, intake-distributing fittings, vibration exciter 23. A device for dispersion and cavitation is made in the form of a cylindrical tank 13 with inserts 18 with rods 19. A throttle device is located under the bushing 18.

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BACKGROUND OF THE INVENTION The invention relates to devices for activating cement and producing a cement slurry.

The purpose of the invention is to intensify the dispersion process.

The drawing shows a dispersant, a general view in section.

The disperser contains an airtight container 1, mounted on shock absorbers 2 and having windows 3 with nuts 4, a fitting 5 connected to a vacuum system (not shown), a screw 6 with a socket 7 and a cork cock 8, a bottom 9 with a socket 10 and a cork cock 11 .

Inside tank 1, a dispersion and cavitation device 13 is parallelly mounted on the shock-absorbing O-rings of rings 12, which is located between the flanges — upper 14 and lower 15, with holes 16. In device 13, channels 17 are formed. In the upper part there are inserts 18 of high-strength alloys with regulating rods 19 with a protruding head 20. Under the liners 18 there is a choke device 21 made in the form of cantilever-mounted segment plates moved by the adjusting unit 22. Inside the device for dispersion and cavitation a vibrator 23 is fixed .

Dispersant works as follows.

In the pipe 7, with the valve 8 open, the valve 11 closed, connected to the vacuum-forming system (not shown) by the fitting 5, and the vibrator 23 turned on, water-cement or other suspension is supplied under pressure, which

made in the form of cantilever-mounted segment plates 21 with a mechanism of movement 22 of the latter. The liners 18 are installed in vertical channels 17 formed in the vessel 13 and symmetrically arranged. The rods 19 are movable. 1 il.

Under the action of the pressure difference and the intrinsic mass alternately passes in the channels 17, the circumferential rod 19, the protruding head 20 of the length 19 adjustable rod 19 and the throttle device 21 accumulates in the lower part of the tank 1 between the spherical bottom 9 and the bottom flange 15.

When wrapped around the rod 19, cavitation zones are created. The cavitation zone is formed in the flow due to an obstacle created by the projecting head 20 of the regulating rod 19. The length of the cavitation zone is controlled by the throttle device 21, which. Creating a backpressure, the release of water-cement or other suspension from the nozzle reacts.

This device 21 can change the pressure distribution along the length of the channel 17 and thus move the area of concentration of the cavitation pu- tations. zyrkov. Through the throttle

Devices 21 can focus the destructive effect of cavitation on different areas in the installation zone of inserts 18 made of high-strength alloys protecting the channel

17 from destruction. Intensive destruction of cement grains is most often observed in the area of the cavitation zone where the bubbles contract and disappear.

When using the device 1 3 for dispersion, for example, cement, it is necessary to adjust the length of the cavitation zone so that its destructive area during the supply of the water-cement slurry all the time

occupied the same place in channel 17 between liners 18. This condition is well preserved at constant values of pressure and speed of the cement-cement slurry entering channel 17 of device 13 for dispersion and cavitation, as well as at a certain constant position of the throttle device 21 regulating the release of the suspension from the channel 17. When the output end of the channel 17 is narrowed, condensation of liquid vapors can be concentrated directly behind the protrusion head 20 of the regulating rod 19, resulting in a zone of cement The nt grains will also move closer to the protruding head 20.

With an increase in the mass of the water-cement slurry (a decrease in the water-cement ratio), the destruction of the cement grains is observed at significantly lower speeds of the driving stream than at low masses of liquid (large water-cement ratios). In these cases, the insertion 18 should also be replaced, which are also gradually destroyed.

The degree of destruction of cement and other grains in the artificially created cavitation zone depends on the flow velocity, cement grades, shape and size of channel 17, and the characteristics of the cavitation zone.

Editor V.Danko

Compiled by T. Machikhina

Tehred V. Kadarkorrektor A.T. sko

4175/12

Circulation 524Subscribe

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

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As the activated cement slurry accumulates, the cork valve 11, which serves as a regulator, opens completely or partially, and it is removed when preparing the mortar or concrete.

Claims (1)

Invention Formula A disperser containing an airtight container with collars installed on the shock absorbers, a device for dispersion and cavitation, a connecting pipe with a vacuum system, a supply distributor, and an exciter, characterized in that, in order to intensify the dispersion process, it is equipped with upper and lower flanges with sealing rings, and the device for dispersion and cavitation is made in the form of a cylindrical container with inserts with rods with a throttle device mounted under the inserts, In the form of cantilever-mounted segmented plates with a mechanism for moving the latter, the inserts are installed in formations in the vessel and symmetrically arranged vertical channels, and the rods are movable, with the nozzle connected to the vacuum system located under the upper flange.