RU1789468C - Pneumatic transport unit chamber feeder - Google Patents

Abstract

Usage: pneumatic supply of bulk materials. SUMMARY OF THE INVENTION Flexible hoses with impellers and loosening pins at their free ends are freely suspended in a chamber feeder reservoir. Compressed gas from the upper part of the reserve passes through the arms, swirls at the outlet of them on the impeller, causing torsional vibrations and bending of the arms. Sleeves, bending and turning together with pins fixed at their ends, loosen the material, which facilitates its unloading from the tank. 5 ill.

Description

The invention relates to industrial piping pneumatic conveying of bulk materials, in particular to chamber feeders of pneumatic conveying installations.

A device for supplying bulk material is known, comprising a container with an upper and lower bottom and a tedder made in the form of a shaft with blades fixed to it and interacting with the drive 1.

The closest technical solution to the proposed one is a chamber feeder of a pneumatic conveying installation, including a receiving tank with a loading funnel and valve, a transport pipeline and a device for distributing compressed gas, which is two connected annular perforated pipelines located, respectively, in the upper and lower parts of the chamber 2.

The disadvantages of these technical solutions are the impossibility of loosening bulk material throughout the tank, which reduces the technological capabilities of the feeder during operation in terms of the inability to transport pelletized, waterlogged and caked materials.

The aim of the invention is to expand the technological capabilities of the feeder by providing loosening of the material throughout the tank.

This goal is achieved in that in the chamber feeder of a pneumatic conveying installation containing a vertical reservoir communicated with its upper part with a source of compressed gas, a loading funnel with a valve, an outlet pipe and a device for distributing compressed gas mounted in the reservoir, the latter is made in the form of flexible hoses suspended their ends to the lid of the tank with the possibility of their communication with the upper part of the tank symmetrically about its vertical axis and uniformly across its area LfTetanus sectional placing them with other free ends at the bottom of the tank.

In this case, the free end of each sleeve is made with a horizontal impeller rigidly fixed in it for swirling

WITH

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gas and radially spaced ripper pins protruding beyond the outer circumference of the sleeve.

On Fig, 1 schematically shows a chamber feeder pneumatic installation, section; in FIG. 2 - section AA in FIG. 1; in FIG. 3 - a device for distributing compressed gas; in FIG. 4 is a view along arrow B in FIG. 3; in FIG. 5 is a section along BB in FIG. 4.

The chamber feeder of the pneumatic conveying installation contains a vertical tank 1 with a cover 2, a loading funnel 3 and a valve 4 mounted on the cover by a pipe 5 connected to a source of compressed gas and an outlet pipe 6 (Fig. 1). In the cavity of the vertical tank 1, a device for distributing compressed gas is placed, which is symmetrically located relative to the vertical axis of the tank and uniformly hanging flexible hoses 7 uniformly over the cross-sectional area thereof, through a perforated fitting 8, suspended with their upper ends to the lid 2 of the tank 1, symmetrically located relative to the vertical axis of the tank and uniformly across its cross-sectional area (Figs. 2 and 3).

On the free end of each sleeve 7 located in the lower cavity of the tank 1, a wire clamp 9 is fixed to the blade impeller 10 of the plane of the blades of which are inclined at an angle a to the vertical axis of the sleeve and radially located loosening pins 11, protruding beyond the outer circumference of the sleeve (Fig. 4 and 5) .

The feeder operates as follows. With the valve 3 open (downward), the bulk material is fed through the feed funnel 3, filling the cavity of the reservoir 1 of the feeder. At the end of loading, valve 4 rises, hermetically closing the reservoir, into which compressed gas is supplied through pipe 5. Unable to filter through a layer of compacted moist granular material, self-densified during loading (falling into the tank or during a long interruption in the work of the loaded feeder), compressed gas through the perforated nozzle 8 and the upper - open ends of the sleeves 7 enters the cavities of the latter.

When leaving the lower - free end of the sleeve 7, compressed gas, bubbler

(fluidized) caked loose material simultaneously acts on the blades fixed in the end part of the sleeve of the impeller 10, causing this end to rotate in the circumferential direction (arrow

+ D) by a certain angle (+ / 3), limited by the internal elastic moment of resistance of the sleeve. Under the action of the specified elastic resistance, the circumferential return of the lower free end of the sleeve 7 in the opposite direction (arrow G, angle - / 3) occurs. The specified torsional, permanent self-oscillating process, which occurs, causes mechanical destruction and activation of caked material by vibrating pins 11 by rippers 11 causing the material to flow into the intake - lower part of the outlet pipe 6.

In addition, at the expiration of compressed gas

from the bottom end not fixed part

the flexible sleeve, the latter begins to gallop with an arbitrary amplitude (± D), which is manifested in the stachostic wave-like motion of the flexible sleeve. This contributes to the destruction of pelletization and the breaking of adhesive bonds between particles of caked bulk material. At the same time, the so-called wall sliding effect is manifested, when

which discrete jets of compressed gas

the aero material breaks through, filtering down along the continuously galloping moving outer surface of the sleeve, i.e. its outer surface becomes gas-conducting in the zone of breaking bonds with particles of material.

The above design features of the device for distributing compressed gas allow

loosening of bulk material throughout the tank (dead zones are excluded), which expands the technological capabilities of the chamber feeder, i.e. - it is possible to pneumatically transport not only dry, but also pelletized, caked and waterlogged material.

Claims (1)

SUMMARY OF THE INVENTION A chamber feeder for a pneumatic transport tank connected with its upper part to a source of compressed gas, a loading funnel with a valve, an outlet pipe and installation containing a vertical mounted in the tank fixture tank communicated with its upper part to a source of compressed gas, a loading funnel with a valve, an outlet pipe and a compressed gas distribution unit, characterized in that, in order to expand technological capabilities by providing loosening of material throughout the tank, the compressed gas distribution device consists of flexible hoses suspended at one end to the tank lid to communicate with tank top sim0 metrically with respect to its vertical axis and uniformly over its cross-sectional area with the placement of their other free ends in the lower part of the tank, while the free end of each sleeve is made with a horizontal vortex impeller rigidly fixed in it and radially located ripping pins protruding outside sleeve circumference. 4 yg, 2