|
In transferring bulk solids cost effectively through a belt
conveyor, it is important to ensure that each component is designed
to give optimum performance. Tega, has for the past 25 years,
been solving problems generally encountered at loading stations.
Renowned for its pioneering work in the design of Impact bars,
universal support bars and pulley bars, Tega also offers the
SPILL-EX skirt sealing system. |
|
Trends in Technical Improvements
of Conveyor Loading Stations:
The loading station, where bulk material is received on belt
conveyors, is a critical area that is often exposed to a variety
of problems. Spillage is one such problem.
The material, when loaded on the belt remains in an agitated
state and needs to be guided to a certain distance till its condition
stabilises. |
Tega SPILL-EX shown fitted on to a conveyor |
|
This has traditionally been done with the help of skirt board
that extend from the discharge chute on both edge of the belt.
To seal the gap between the bottom edge of the skirt board and
the moving belt, lateral rubber strips were introduced. This
did control the spillage but only to a limited extent, as the
strip could not be adjusted to match with the belt profile. This
led to development of segmented type rubber sealing that could
be individually adjusted to the belt contour. However, to avoid
spillage completely, the gap between adjacent segments still
needed to be eliminated.This required design ingenuity. |
Responding to this need, Tega patented the SPILL-EX skirt sealing
design. A simple yet effective construction, SPIILL-EX has succeeded
in making conveyor loading stations completely spillage free.
The use of SPILL-EX has also enabled many Companies to achieve
ISO 14000 certification which places great emphasis on the control
of environmental degradation. |
|
How SPILL-EX functions
The SPILL-EX skirt sealing systems comprises a specially
designed backing plate, rubber blocks and serrated clamps that
completely seal the belt edges at the loading station.
The rubber skirt blocks are slid on to guides provided on
the baking plates and are held in position by means of the serrated
clamps which prevents the rubber skirt block from moving up or
away from the belt and allows them to be hammered down towards
the belt. |
|
 |
|
SPILL-EX FEATURES |
 |
Fits easily to existing or new conveyor
systems |
|
|
Soft but firm contact gives complete
sealing |
|
|
Special wear-resistant rubber ensures
long life |
|
|
Simple to install and adjust |
|
|
Individual blocks can be replaced without
damaging adjacent ones |
|
|
The soft rubber eliminates belt damage |
|
|
Wide range to suit all site conditions |
|
|
Various Components
of SPILL-EX |
 |
|
Backing Plate
This is available in 3mm thick carbon steel for general application
and in SS304, for corrosive material handling. Standard backing
plates are L-shaped, while Z -shaped universal backing plates
are provided on request. |
|
Clamps and Fasteners
These are available in carbon steel for general application and
in SS 304 for corrosive applications. |
|
 |
|
Rubber Blocks
These are made from soft, durable rubber of 50°-60°
Shore A hardness. The standard size of the skirt block is 150*200mm,
while a smaller version 125*150mm is also available for applications
where installation space is limited.
Normal grade rubber blocks can operate with temperatures ranging
from -20°C upto 65°C, while specialheat resistant rubber
blocks can withstand hot material upto a maximum of 150°C. |
|
 |
 |
Rear Skirt Sealing
Skirt sealing is generally provided on side skirts. However,
for conveyors inclined upwards or for those handling fines, the
sealing of the rear of the belt is necessary.
Rear skirt sealing is provided with a fixed width. The height
of the rubber blocks is increased to 300mm to compensate for
trough height. |
|
|
