VERTICAL TUBULAR SCRAPER CONVEYERS
S. Ya. Davydov,
I. D. Kashcheev,
and S. N. Sychev
Translated from Novye Ogneupory, No. 11, pp. 34 – 37, November 2010.
Original article submitted September 18, 2010.
A detailed description is provided for construction and operation of tubular scraper conveyers (TSC). Compar
ative evaluation and technical characteristics of TSC are provided. TSC advantages and disadvantages are
listed. A procedure is given for determining TSC production parameters.
Keywords: tubular scraper conveyers (TSC), scrapers, chain, traction calculation, resistance coefficients,
The high specific energy consumption, rapid wear of
equipment with movement of abrasive building materials,
cumbersome nature of devices for individual shipment of a
load, cleaning shipment air, and also the unsuitability for
shipping bonded materials (sticky, moist, etc.) limits the field
of application of pipeline pneumatic transport.
There is widespread use of tubular screw conveyers,
whose working device is a spring spiral, rotating in a tube. In
accordance with the classification adopted these conveyers
may be related to trackless screw conveyers. Conveyers have
quite high sealing capacity, which provides good health and
hygienic working conditions. They may have any three di-
mensional track. A spiral rotates by means of a reducing mo-
tor and carries material over a track determined by the tube.
These conveyers are simple and reliable, and they are pro
duced by many enterprises. However, it should be noted that
the screw spiral itself is very complicated from the point of
view of production technology, it is manufactured mainly in
Belgium and Holland, and until now its is only imported.
Russian producers more often offer tubular scraper con
veyers (TSC), also called disk conveyers, they are a sealed
pipeline of standard tube within which a chain moves with
scrapers fastened to it (Fig. 1).
The main advantages of TSC are sealing and a compara
tively low energy requirement, the possibility of completing
almost any three-dimensional track. In some TSC construc
tions, a cable is used instead of a chain, depending on the
properties of the material being moved. Tubular scraper con
veyers [1 – 5] are distinguished by the variety of track and
have the following parameters: internal tube diameter
75 – 400 mm, chain velocity 0.1 – 0.5 m/sec, productivity
0.5 – 200 m
In TSC with a flat track drawing chains of many types
are used, and with three-dimensional curves tracks there is
mainly use of sectional curved-link drawing chains, and indi
vidual cases drawing cables. Scrapers are manufactured from
steel, cast iron, plastics, rubber, and also combined, i.e., with
a shroud of resin or plastic. The pitch of scrapers in TSC with
a rectilinear track is assumed to equal two to three diameters
of the tube, but with curvilinear tracks it is one diameter. The
trough of a TSC is manufactured in the form of unified sec-
tion with a length of 4–6m of standard tube with a wall
thickness of 3 – 6 mm. Curving of tubes is made with a ra-
dius of 1.2 – 2.0 m.
A vertical TSC is shown in Fig. 2. In tube 1 with a hatch
5 chain 2 with scrapers 3 fastened to it is put into movement
from a drive spider, rotated by a drive mechanism 7. The
loading device 4 is placed in a horizontal section. At the end
of the unloading section 6 there is cleaning device (normally
of the vibration type) for cleaning the moving part from load
residue. The chain is stretched by tension device 4. More
than 60% of tubular chain conveyers from the firm
Rohrkettensystem GmbH are used in unloading filters and
subsequent dust removal. Sealing of tubes due to excess
pressure or rarefaction is achieved by means of closing disks.
In this case the movement rate of the chain agrees with the
required conveyer productivity.
Refractories and Industrial Ceramics Vol. 51, No. 6, March, 2011
1083-4877/11/5106-0416 © 2011 Springer Science+Business Media, Inc.
FGAOUVPO B. N. El’tsin Ural Federal University, Ekaterinburg,
Fig. 1. Tubular scraper conveyer (disk).