Theoretical Studies of the Unloading of Containers in the Pneumatic Transport Systems of Today and Tomorrow
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Vol. 54, No. 3, September, 2013
THEORETICAL STUDIES OF THE UNLOADING OF CONTAINERS IN THE PNEUMATIC TRANSPORT SYSTEMS OF TODAY AND TOMORROW S. Ya. Davydov,1 N. P. Kosyrev,1 N. G. Valiev,1 D. I. Simisinov,1 V. A. Kurochkin,2 and A. E. Zamuraev3 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 containers on the loading and unloading sections of a containerized pneumatic transport system. A method is devised 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 presented 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 material being transported are braked to the section in which empty containers in the transport tube are accelerated — 1 2 3
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 containers on these sections. The problem of providing for uninterrupted loading of the containers was solved by redesigning 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 containers are forced into continuous movement on the loading and
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 section; 6 ) by-pass tube; 7 ) air release valve; 8 ) safety valve; 9 ) loading section.
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.
178 1083-4877/13/05403-0178 © 2013 Springer Science+Business Media New
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