RU1818289C - Installation for preparation and pneumatic transportation of concrete mix - Google Patents

Abstract

Usage: preparation and pneumatic supply of dry and viscous concrete mixtures. SUMMARY OF THE INVENTION: the components of the concrete mixture are mixed in a tank, squeezed out by compressed gas through a mixing chamber with an ejector into a transport pipeline, and discharged through a discharge device. The unit is reconfigured to supply liquid or dry concrete mixes by moving the mixing blades along the tank shaft, changing the mix chamber ejectors and replacing the discharge device with a nozzle with a nozzle for wetting liquid under the water. 1 s P. f-b, ill.

Description

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The invention relates to pneumatic transport and can be used in installations for the preparation and pneumatic transportation of liquid-hard and loose concrete mixes in the construction of industrial, civil, mining purposes, as well as hydraulic structures and reinforcements of buildings, structures in the earthquake zone during restoration work.

The purpose of the invention is to improve the technical characteristics of the installation, reducing the consumed working pressure of compressed air to 0.25-0.4 MPa, depending on the height of transportation of the concrete mixture using its own compressor installed on the overall frame of the installation, eliminating high ripple that poses a danger to service personnel, providing the ability to control the performance of the installation, depending on the specific volumetric weight of the concrete mixture, providing transportation of dry bulk concrete component mixtures using readjusted apparatus gains constructions and constructions in extreme conditions and disaster recovery operation on x without the use of special molds.

In FIG. 1 shows the installation, a General view; in FIG. 2 is a section AA in FIG. 1 (mixture preparation chamber with a transportation chamber); in FIG. 3 is a section BB in FIG. 2; in FIG. 4 is a view B in FIG. 2; in FIG. 5 is a section AA in FIG. 1 (a transportation chamber with a device for conveying loose, dry concrete mixes and a nozzle for wetting inertially applying the mixture to building structures); in FIG. 6 - section GG in FIG. 5.

Installation for preparation and transportation of viscous and loose concrete mixtures contains a chamber for preparing the mixture

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with a cover 1, a transportation chamber 2, a central shaft 3 with a drive 4, blades 5 mounted at an angle of 30-45 ° relative to its own axis and possible to move them along the axis of the central shaft from left to right, interchangeable adjustable baffle device 6 with different geometric parameters along the length and inner diameter depending on the volumetric weight of the mixture. A special insertion device for transporting loose dry concrete mixes: 7, a compressor head with a drive 8, a receiver, a shock absorber of compressed air 9, a skip device 10 for sorting by fraction of concrete mixture and loading it into the chamber: double-drum hoist winch 11, a nozzle for wetting dry concrete mixtures with liquid and inertial deposition on building structures 12, material pipeline 13, terminal device 14, control panel 15..

Installation works as follows

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The installation is installed in the working area. Using a skip device 10, a fraction of the dry concrete mixture is sorted and loaded into the preparation chamber t. Using the control panel 15, the drive 4 is turned on / the rotation is transmitted to the central shaft 3 and the blades 5 are thoroughly prepared by mixing the concrete dry mix or, if necessary, the viscous concrete mixture by adding the necessary LIQUID /.;-/- during mixing ; ;; - :. ; ..; . .. : /.,, ;; -. -

Close the lid of the pressurized cooking chamber 1, turn on the drive of the compressor head 8 and the generated compressed air under pressure 06-07 MPa enters the spring-shock absorber 9 and through; air distribution ramp, by opening a shut-off device against compressed air, compressed air enters the preparation chamber 1 and the required overpressure is issued within 0.25-0.4 MPa, depending on the maximum height of transportation of the concrete mixture.

Using another shut-off device, compressed air is directed into the concrete conveying chamber 2 through an interchangeable adjustable ejector device b, wherein the interchangeable ejector device changes depending on the fraction of concrete and viscosity being transported.

When transporting viscous or liquid concrete mixtures, the classical transportation system is used (Figs. 2, 3, 4).

Dry or absolutely dry concrete mixtures are transported using a special plug-in adjustable adjustable ejector device 6, material conduit 13, nozzles for wetting the dry concrete mixtures 12 with liquid under pressure and providing inertial application of the finished concrete mixture to building structures according to the classical system (Fig. , 5, 6). The unit provides the preparation and transportation of liquid-viscous concrete mixtures smoothly, portionwise, intermittently without jet shocks, depending on the parameters of the interchangeable adjustable ejector device Ј. In this case, the second extreme blade 5 is installed in the area of the transportation chamber (Fig. 4) and serves to block the inlet, and to transfer a certain portion of the concrete mix to the transportation chamber 2.

The proposed transportation scheme of the concrete mixture provides the creation of reactive pulp movement in the material pipe t3, t, e. between the transport pulps in the material pipeline 13, the air pressure drops sharply to a minimum pressure of 0.05-0.1 MPa. This phenomenon and mechanics are studied by the authors. This phenomenon is explained as follows: the transport chamber 2 is mounted in the zone of forming centrifugal forces and, with the help of the extreme second blade 5, under a centrifugal force, a certain portion (pulp) is pumped and picked up by air and ensures supply to the material passage without pulsation, impacts, and is smooth transportation to the material pipeline and exit without back impacts at the end of the end device 14.

After re-adjusting, i.e. moving the last second blade 5 from the zone of the transportation chamber 2, changing the adjustment of the pyeMOfo of the ejector device b to the desired one with the inclusion of a special device for transporting loose dry concrete mixes 7 with the material pipe 13 and the nozzle for wetting the dry concrete mixtures 12 with liquid into the transportation chamber, smooth, uniform transportation and application of the concrete mix to building structures and ensuring a uniform structure of the structure corresponding to the Nosta and fractions according to the project and SNIP.

Tests have shown high reliability of the operation of the installation as a whole and in different modes of transportation of concrete mix, in different phases from liquid to absolutely dry state during the construction of facilities for various purposes, including reconstruction in the earthquake zone when reinforcing buildings and structures without the use of formwork.

Claims (2)

SUMMARY OF THE INVENTION 1. Installation for preparing and pneumatically conveying concrete mixture, comprising a horizontal cylindrical tank with a loading hatch in its upper part and an unloading pipe in the lower part, a drive shaft mounted along the axis of the tank, holders mounted on the shaft perpendicular to its axis and made with mixing blades mounted at their free ends, a mixing chamber in communication with the discharge port of the tank, a transport pipeline in communication with one at its end with a mixing chamber and made with an unloading device attached to its other end: a device and a drive compressor communicated by its discharge channel with the cavity of the tank and by means of a nozzle with the mixing chamber, so that , in order to expand technological capabilities by providing the preparation and transportation of both viscous and dry concrete mixes and regulation of performance, des-GT 7iFig .1 The clamps are mounted on the shaft with the possibility of moving along it, each mixing blade is mounted on its holder with the formation of an angle of 30-45 ° C between its plane in the vertical position and the axis of the shaft, the nozzle is removably mounted in the mixing chamber with the formation of the mixing chamber between it and ejection cavity and directed towards the transport pipeline, while the installation is equipped with additional nozzles made with different lengths and passage sections with the possibility of their installation instead main nozzle ....... 2. Installation according to Part No. - so that, with the aim of expanding technological capabilities by ensuring the application of concrete mass to building structures during transportation of dry concrete mixes, the unloading device is not installed KOHIS © transport, tailor pipeline with the ability to disconnect from Nega, 8uet evacuation additional unloading addition, made into nozzles with a nozzle for guiding it into it, without any fluid, while the koshefsor is full with a reshver, and the tank is made with the ability to connect two to it; a slave industrial unit with a pulling winch for loading concrete mixture components into the tank. eleven . ,. % f / S ff / ////// te3 ШШ .7 y p Fig. 8 P