SU1729965A1 - Arrangement for loading loose material into pneumatic feeder - Google Patents

Abstract

This invention relates to the pneumatic transportation of bulk materials. The purpose of the invention is to increase reliability. The device for loading bulk material into a pneumatic feeder contains a feed hopper 1 with a discharge pipe 2, an overflow pipe 4 with a valve 5, a pneumatic feeder 6, a gas nozzle 7, a pressure chamber 8 and an expansion chamber 9 communicated with the atmosphere. Bulk material from the hopper 1 through the nozzles 2 and 4 by gravity enters the feeder 6. After filling the feeder with material, the compressed gas is supplied by a nozzle 7 in. Chamber 8, squeezes the material from nozzle 4 into chamber 9 and closes valve 5, after which the pressure in the feeder 6 rises and the compressed gas transports the material from the feeder 6 to the consumer. After the feeder is empty, the supply of the compressed gas by the nozzle 7 is stopped and the cycle is repeated. The device makes it possible to increase reliability by eliminating the contact of the material with the valve 5 when it is closed. 1 il. cl

Description

The invention relates to pneumatic conveying and can be used to transport bulk material under pressure with high concentration and variable flow.

A device for loading bulk material into a pneumatic feeder is known, comprising a feed hopper with a vertical discharge port at the bottom, an overlapping gate valve, an overflow pipe with a rotary check valve at its outlet end communicated with the pneumatic feeder inlet, and a gas supply nozzle, located by its outlet opening opposite the check valve with the possibility of rotation of the latter under the influence of a jet of compressed gas flowing out of the nozzle.

However, this device has low reliability.

The purpose of the invention is to increase reliability.

The drawing shows the device, the overall view ..

The device for loading bulk material, mainly sand, supplied to improve the adhesion of rail vehicles, includes a feed bin 1 with a vertical discharge port 2 in the lower part, covered by a gate valve 3 placed under the discharge port 2, an inclined overflow pipe 4 with a rotary check valve 5 at its outlet end communicated with the inlet of the pneumatic feeder b, and the gas supplying nozzle 7, located with its outlet orifice opposite the check valve 5 rotatable under the influence of the last jet issuing from the gas supply nozzle 7 present the compressed gas from an external auxiliary source (is not shown).

The feed hopper 1 has a pressure chamber 8 and an expansion chamber 9, while the pressure chamber 8 is mounted to cover the output end of the inclined overflow pipe 4 and the inlet of the pneumatic feeder 6 and is connected with its cavity to the gas inlet nozzle 7.

Expansion chamber 9 is mounted to cover the discharge port 2 of the feed bin 1 and communicates with its upper part with the atmosphere, while the outlet end of the discharge pipe 2 is placed with a gap above the bottom of the expansion chamber 9, and its inclined bypass 4 is communicated with its inlet end with the lower part expansion chamber 9 and is installed with the location of its output end above the inlet of the pneumatic feeder 6.

The supply of sand from the feed hopper 1 is carried out in the pneumatic feeder 6.

The device works as follows.

Dry sand through the vertical discharge pipe 2 through the open gate valve 3 and the rotary check valve 5 from the feed bin 1 through the inclined bypass pipe 4 enters the pneumatic feeder 6.

After the pneumatic feeder 6 is filled with dry sand, compressed air is supplied from the autonomous source through the gas supply nozzle 7, the jet of which drives the sand, displacing it to zone b formed by the angle of repose of dry sand in the pneumatic feeder 6 and upwards through the inclined bypass nozzle 4 - into the expansion chamber 9 of the feed bin 1, in which the zone is formed by the angle of repose of dry sand, side walls and the bottom of the expansion chamber 9 and the vertical discharge pipe 2 of the discharge 1. Zone hopper and formed in the expansion chamber 9 artificially so that between the bottom of the latter and the lower end of vertical discharge pipe 2 is formed by the need to guarantee a technological gap, necessary for a reliable and hermetic closing of the rotary reverse valve 5.

The compressed air stream releases the lapping surface of the outlet of the inclined overflow pipe 4 and the mating surface of the rotary check valve 5 from the sand and brings it to the closed position. Pressure is generated in the pneumatic feeder 6 and the sand is squeezed out of it, after which the air pressure from the external source is turned off. . In the pneumatic feeder 6, the air pressure drops, the rotary check valve 5 opens and the sand begins to flow again into the pneumatic feeder 6.

This device is characterized by increased reliability of operation and increased service life without additional funds and capital investments.

Claims (1)

Invention Formula A device for loading bulk material into a p-nematic feeder containing a feed hopper with vertical a discharge pipe in the lower part, covered by a gate valve, placed under the discharge pipe, a transfer pipe with a rotary non-return valve at its outlet end communicated with the inlet of the pneumatic feeder, and a gas supply nozzle located with its outlet orifice opposite the non-return valve with the possibility of turning the latter under the influence of a jet of compressed gas flowing out of the nozzle, characterized in that, in order to increase reliability, it is equipped with an injection chamber mounted with coverage of output 0 five the end of the overflow pipe and the inlet of the pneumatic feeder and communicated with its cavity to the said gas supply nozzle, and an expansion chamber mounted to cover the discharge pipe of the feed hopper and communicated with its upper part to the atmosphere, while the outlet end of the discharge pipe is placed with the gap above the bottom of the expansion chamber, and the bypass pipe communicates its inlet end with the lower part of the expansion chamber and is installed with the location of its outlet end above pneumatic feeder through hole.