THEORETICAL STUDIES OF THE UNLOADING OF CONTAINERS
IN THE PNEUMATIC TRANSPORT SYSTEMS OF TODAY AND TOMORROW
S. Ya. Davydov,
N. P. Kosyrev,
N. G. Valiev,
D. I. Simisinov,
V. A. Kurochkin,
and A. E. Zamuraev
Translated from Novye Ogneupory, No. 6, pp. 13 – 22, June, 2013.
Original article submitted January 21, 2013.
A drive consisting of continuously rotating friction tires is used to force the uninterrupted movement of con
tainers on the loading and unloading sections of a containerized pneumatic transport system. A method is de
vised to determine the number of containers in the system, and another method is developed to describe the
motion of particles of the cargo in order to determine the angular velocity of the containers. A formula is pre
sented to determine the terminal velocity of a continuously moving container train in the transport tube of the
system. A tube-based transportation system is proposed for transporting workers from quarry to factory — the
pneumatic transport system of tomorrow.
Keywords: containerized pneumatic transport, length of the unloading section, angular velocity, discharge
process, bulk material, tube, passenger pneumatic transport.
The most distinctive features of the new containerized
pneumatic transport (CPT) systems (Fig. 1) being used in the
construction industry were described in [1 – 5].
By-pass tube 6 — designed to transport compressed air
from the section in which the containers loaded with the ma-
terial being transported are braked to the section in which
empty containers in the transport tube are accelerated —
makes it possible to use spent air in the cargo section of the
tube to move empty containers.
An analysis of the technical and scientific literature
showed that the productivity of CPT systems depends mainly
on the loading and unloading sections. Productivity can be
increased by arranging for continuous movement of the con
tainers on these sections. The problem of providing for unin
terrupted loading of the containers was solved by redesign
ing the system so that its loading is similar to the loading of
slat conveyors or conveyor trains with partitions. At the same
time, the ability to release a load of rocks without stopping
the containers by rotating them about their axial line depends
on the process used to discharge the bulk cargo. The contain
ers are forced into continuous movement on the loading and
Refractories and Industrial Ceramics Vol. 54, No. 3, September, 2013
1083-4877/13/05403-0178 © 2013 Springer Science+Business Media New York
Ural State Mining University, Ekaterinburg, Russia.
Ural State Academy of Architecture and Arts, Ekaterinburg, Russia.
Ural Federal University Ekaterinburg, Russia.
Fig. 1. Containerized pneumatic transport system: 1 ) containers;
2 ) compressor station; 3 ) transport tube; 4 ) drive; 5 ) unloading sec
tion; 6 ) by-pass tube; 7 ) air release valve; 8 ) safety valve; 9 ) load
Fig. 2. Diagram of the container unloading section of an annular
CPT system: 1 ) containers; 2 ) wheel supports; 3 ) spiral discharge
guide; 4 ) transport tube; 5 ) drive.