CS201477B1 - Facility for the transport and dosing of the finegrained loose materials notably for the mining purposes - Google Patents

Description

The invention provides a device for conveying and dispensing fine-grained bulk materials, in particular for mining purposes.

For the conveying and spraying of concrete mixtures, devices commonly referred to as concrete spraying machines are used. These machines work with a dry concrete mix, which is supplied to the hopper of the machine and pneumatically conveyed by pipeline to the spray nozzle where it is humidified by the mixing liquid. The preparation of dry concrete mixture for spraying is carried out manually, it is very strenuous, does not ensure accurate dosing and sufficient mixing of the components of the mixture. This leads to uneconomical use of the material. It is also used for spraying concrete mixtures prepared in industrial plants, which are transported underground in bulk in mining trucks or containers. The manual handling of the material, especially its frequent reloading, is very strenuous and low-productive, while the packaged material easily damages the packaging and thus greatly loses the transported mixture. A serious disadvantage when handling dry concrete mixture before spraying is its considerable dustiness, respectively the dustiness of cement and other fine-grained components of the dry concrete mixture.

These disadvantages are overcome by the device for conveying and dispensing the fine-grained bulk materials according to the invention. Its essence consists in that it consists of a combination of at least one pressure reservoir of a fine-grained bulk material, a dispenser and a pneumatic conveyor. The dispenser is located at the bottom of the pressure tank and its outlet is connected

201 477

201 477 on the pneumatic conveyor chamber. The inlet chamber of the pneumatic conveyor may be arranged such that a pneumatic nozzle coaxial with the inlet part of the pneumatic conveyor is located below the outlet of the dispenser. A mechanical coupling can be made between the compressed air supply controller and the pneumatic nozzle pressure regulator. A level indicator may be stored at the bottom of the pressure tank. The dispenser can be equipped with its own drive unit with continuous speed control. The device can be placed on the chassis.

The device for conveying and dispensing fine-grained bulk materials according to the invention provides for the mechanized transport and handling of cement for preparing a dry concrete mixture for spraying from surface to underground. The device eliminates laborious manual work, increases work productivity and reduces material loss while improving hygiene conditions and enhancing work culture.

The accompanying drawing shows schematically exemplary arrangements of devices for the lawn and dosing of fine-grained bulk materials.

The apparatus located on the chassis 40 is comprised of two pressure tanks 10 of fine-grained bulk material, a dispenser 20 and a pneumatic conveyor 30. The dispenser 20 is located at the bottom, the pressure reservoirs 10 and its outlet 21 is connected to the inlet chamber 3.1 of the pneumatic conveyor 33. 31 of the pneumatic conveyor 30 is arranged such that a pneumatic nozzle 32 is disposed beneath the outlet 21 of the dispenser 20, which is coaxial with the inlet part of the pneumatic conveyor 30. In the lower part of the pressure reservoirs 10 are level indicators 11. The conveying and dosing device is disposed on the chassis 40. A mechanical coupling can be made between the uncontrolled compressed air supply actuator 10 and the pressure regulator of the pneumatic nozzle 32. The pressure reservoirs 10 are provided with filling openings 12. The dispenser 20 is equipped with its own drive unit with continuous speed control.

The transport and dosing equipment is filled with cement. The equipment is transported to the station of the machine for transport and spraying of concrete mixture by means of mining equipment and rail transport. The conveying and dosing device is connected via a pneumatic conveyor 30 to a machine for conveying and spraying concrete mixture. The pneumatic nozzle 32 of the pneumatic conveyor 30 is connected to a source of compressed air. After the desired amount of cement has been set, the drive unit of the feeder 20 is actuated, which feeds the cement into the inlet chamber 31 of the pneumatic conveyor 30. Compressed air is also supplied above the cement level in the pressure tank 10. A drop in the cement level in the pressure tank 10 below a specified level is indicated by a level indicator 11.

The device according to the invention is intended for the transport and dosing of fine-grained loose materials, in particular for the transport and dosing of cement into concrete mixtures for building shotcrete technology, concrete floors after separating the epode layer of the mine from the extracted ore.

Claims (4)

SUBJECT OF THE INVENTION An apparatus for conveying and dispensing fine-grained bulk materials, characterized in that it comprises a combination of at least one pressurized bulk container (10) of fine-grained bulk material, a dispenser (20) and a pneumatic conveyor (30), the dispenser (20) being disposed in the lower section a pressure reservoir (10) and the outlet (21) of the dispenser (20) is connected to the inlet chamber (31) of the pneumatic conveyor (30). Transport and dosing device according to claim 1, characterized in that a pneumatic nozzle (32) coaxial with the inlet part of the pneumatic conveyor (30) is located below the outlet (21) of the dispenser (20). Transport and dosing device according to claim 1, characterized in that a level indicator (11) is located in the pressure reservoir (10) in its lower part. Transport and dosing device according to claim 1, characterized in that the dosing device (20) is equipped with its own drive unit with continuous speed control.