The Mechanical Handling and Storing of Material
Forfatter: A.-M.Inst.C E., George Frederick Zimmer
År: 1916
Forlag: Crosby Lockwood and Son
Sted: London
Sider: 752
UDK: 621.87 Zim, 621.86 Zim
Being a Treatise on the Handling and Storing of Material such as Grain, Coal, Ore, Timber, Etc., by Automatic or Semi-Automatic Machinery, together with the Various Accessories used in the Manipulation of such Plant
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CONTINUOUS TROUGH CONVEYORS 109
ping gear a is raised into position, and as the lever b engages with
the tripper a, the buckets are discharged. At the driving end the
units are guided round the terminal by an attachment c, and
when leaving this the units of the tray hang down in a vertical
Fig. 143. Further Type of Continuous Trough Conveyor.
direction, so as not to impede the fall of the material conveyed, in
the event of no delivery shoot being found desirable. The chains,
with their guide rollers used in these conveyors, are the same as
those used in the gravity bucket conveyor of the same firm.
Table giving Dimensions, Capacity, and Speed
of these Conveyors
Width of Trough. Depth of Trough. Pitch of Chain. Capacity in Tons of Coal per Hour.
Inches. Inches. Inches
12 4 12 35
16 6 12 50
22 6 12 80
30 6 14 150
36 8 14 200
42 10 14 300
The normal speed of the conveyor is 60 ft. per minute, and
the capacities given above are for these speeds, the maximum
speed being 80 ft. per minute.
Smaller conveyors on the same principle, with capacities of
from 6 to 20 tons per hour, are also made, but they have only
single chains instead of double, the widths for these varying from
6 to 12 in. with a chain of a pitch of 6 in.
In cases where these conveyors are used for removing ashes
and clinkers from boiler houses the whole of the working parts
are covered on both sides at the loading point with sheet-iron
guards, which are curved inwards at the top, covering the upp$r
edge of the trough, so that no ashes can come in contact with the
chain of the conveyor.
The Cornet Conveyor shown in Fig. 147 differs materially
from the foregoing. This conveyor is used in connection with
coal handling plants for loading and at the same time sifting
coal. In this case the material to be conveyed is carried not on
iron plates, but on a grating of round iron bars which are attached
at both ends to the two driving chains. The idea is to carry the
large coal on the grating in order to screen out through the
apertures such small coal as may be mixed with it. The coal
falls direct from the screen on to the band, receiving a further screening as it passes
along in a horizontal direction, and is then loaded directly into the railway trucks. I o