SU463602A1 - Screw feeder for pneumatic conveying materials - Google Patents

Description

one

Known screw feeders for pneumatic transport of bulk materials containing a feed hopper, an energetic auger with a casing and a check valve, a mixing chamber With a seat and a pipe for supplying compressed air. And a material conduit.

However, in known feeders, there is insufficient stability in operation due to the possibility of compressed air being pushed into the feed hopper and slowing down of material outflow from it.

The aim of the invention is to increase the stability of the operation of the feeder. This is achieved by the fact that a valve interrupter is installed in the nozzle, providing a pulsating supply of air into the chamber. The chopper valve can be made in the form of a disk with two spherical visors mounted on a rotating axis connected by a drive.

The drawing schematically shows the described feeder. It contains a feed hopper 1, a pressure screw auger 2 € with a casing 3 and a non-return valve 4, a mixing chamber 5 with a nozzle 6 and a nozzle 7 for supplying compressed air and a material pipe S. In the nozzle 7 there is an interrupter valve 9 made in the form of a disk 10 with two Spherical visors 11 mounted on a rotating axis 12 connected to the actuator 13.

The conveyed material is loaded into the funnel 1, fed by the screw into the mixing chamber 5, where it is picked up by a jet of compressed air leaving the nozzle 6, and sent to the material line 8.

The separation of the high pressure zone in chamber 5 and the low pressure zone in funnel 1 is achieved by forming a material "plug" in the outlet part of the screw 2.

A pulsating compressed air supply, carried out by a choke valve 9, provides an increase in the locking capacity of its formation, as a result of which the possibility of leakage of compressed air is reduced.

air into the cavity of the funnel improves the conditions for the outflow of material from the body and increases the uniformity and stability of the operation of the feeder.

Subject invention

20

1. Screw feeder for Pnevmotnsport of bulk materials, containing a feed funnel, pressure screw with a casing and a check valve, mixing chamber with

a nozzle and a nozzle for supplying compressed air and a material pipeline, characterized in that, in order to increase the stability of its operation, a chopper valve is mounted in the nozzle, which carries out a pulsating

air supply to the chamber.

2. The ino feeder of p. I, characterized in that the valve-chopper is made in the form of a disk with two spherical visors,

mounted on a rotating axis associated with the drive.