SU1314084A1 - Spraying concrete and plugging composition in mine workings - Google Patents

Abstract

The invention relates to mining. And can be used in the laying of concrete mixes without formwork and behind formwork. The invention makes it possible to increase labor productivity and save materials by using coarse aggregate. The device has a main bunker mounted on the transport trolley and a hermetic bunker 3 with a mixing chamber 14 for coarse aggregate. Camera 14 is composed (L DO 00 4i.

Description

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from a hollow truncated cone 15, to which the feed 16 and 17 and the outlet 18 nozzles are connected at different levels, the nozzle 17 is equipped with a horizontal agitator-agitator (SV) 19, which operates from an independent drive and has a locking device (ZP) 22 The main bunker contains metering and mixing mechanisms with a drive and a pump and is made of a storage compartment for an accelerator.

The invention relates to the mining industry and can be used when laying concrete mixes and solutions without formwork and for formwork, and can also be used in hydraulic engineering and road construction.

The aim of the invention is to increase labor productivity and material savings through the use of coarse aggregate,

FIG. 1 shows a device, a general view {in FIG. 2. - hermetic hopper with mixing chamber for coarse aggregate, longitudinal section.

The device for the preparation and the method of layer-by-layer application of sprayed concrete and cementing consists of a trolley 1 with a hopper 2, a pressurized hopper 3 divided into compartments 3. The hopper 2 consists of a metering 4 and a mixing 5 mechanisms with a drive 6, an injection device (plunger-type pump) 7, storage compartment 8 for accelerator setting, supplying material hose 9, outlet material hose 10 with nozzle 11, pipeline 12 for supplying water, pipeline 13 for supplying aerosols, accelerator setting to nozzle 11 and mixing chamber 14 for a large aggregate "

The mixing chamber 14 for coarse aggregate consists of a hollow truncated cone 15, to which are connected at different levels, the inlet nozzles 16 and 17 and in the center the outlet 18, as well as from the horizontal agitator auger 19, installed 4084

wiping, leading and discharging the hose with the nozzle. and pipelines for the supply of water and aerosols. In the production of concrete works, layers of sand-cement mixture are applied through chamber 14, first with non-rotating SW 19, and then for the second layer with rotating SW 19 with open RFP 22. Tamping of the fixed space with non-rotating SW 19 and closed ZP 22, 1 s. P. f-ly, 2 ill.

in the inlet pipe 17, operating from the electric motor 20 with the gearbox 23 and the limit switch 24, and the locking device 22.

A material hose 9 from an injection pump 7 is connected to the inlet pipe 16, and a sealed container 3 is connected to the inlet pipe 17 by means of a pneumatic discharge pipe 21.

The device works as follows.

The compartments of the bunker 2 are loaded with components of a sand-cement mixture, and the sealed bunker 3 is filled with large aggregate, which, via the pneumatic unloading line 21, the feeding nozzle 17, when rotating the agitator 19, enters the mixing chamber 14 for the large aggregate and burns . During the operation of the installation, the sand-cement mixture which constitutes the mixture is fed through the metering device 4 into the mixing device 5, where it is shut off with water coming from the pipeline 12. 9 material hose. ,

Following the inlet material hose 9 to the inlet pipe 16, the mixture enters the mixing chamber 14 with coarse aggregate.

The movement of the sand-cement mixture occurs at a high speed, which contributes to the required mixing of the coarse fraction in the mixing chamber 14 for coarse aggregate. Go

Concrete with coarse aggregate rushes through the outlet pipe 18 into the outlet material hose 10 with the nozzle 11. In the latter, the concrete mixture is enriched with an accelerator grab, coming in vvde aerosols through the pipeline 13, and then applied to the surface to be coated.

In the production of sprayed concrete works, the first layer is applied in layers to the surface to be coated with a sand-cement mixture and enters through the mixing chamber 14 for coarse aggregate with non-rotating agitator 19 and closed locking f5 device 22, the second layer with coarse aggregate is applied onto uncured sand. the cement mixture of the first layer with a rotating horizontal auger-agitator 19 with an open locking-20 device 22. This allows you to reduce the rebound of the maximum spray of the concrete from the surface to be covered in 4-6 time.

Tamponage fixing space. 25 with the proposed installation, with a non-rotating auger 19 and a fully closed shut-off device 22 of the mixing chamber 14 for coarse aggregates .30

The proposed device provides a separate erection of the lining in an ash-shaped way, an increase in the strength of the erected lining, an increase in labor productivity, as well as 35 savings of reinforced concrete products by layer-by-layer erection of a monolithic obelka. In addition, the device, compared to the prototype, allows to obtain separate preparation of the concrete 40 mixture with a large fraction and ensure

alternation of sand-cement mix and concrete with coarse aggregate.

Claims (2)

1. A device for spraying concrete and grouting in mine workings, including a transport carriage with a bunker installed on it, divided into compartments, one of which is intended for storing the accelerator setting, the other - for mixing components of the mixture, with built - / In it, with a metering device, a plunger pump connected to the mixing chamber by a discharge pipe at the end of which a nozzle and supply pipes are installed, supplying compressed air from the bottom of the pump, and water in the compartment for mixing the mixture components. , in order to increase labor productivity and save material through the use of coarse aggregate, the device is additionally equipped with a hermetic hopper with a mixing device mounted on the transport carriage, and to the bunker with an external the sides are connected by two inlet pipes located at different levels and one outlet pipe installed on the outside of the bunker in the bottom part perpendicular to its longitudinal axis. 2. A device according to claim 1, characterized in that the discharge pipe is provided with a agitator screw with an autonomous drive and a locking device. Editor N.Slobod nickname Order 2192/37 Circulation 455 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Compiled by L. Berezkina Tehred L. Oliynyk Proofreader E. Roshko