Vigan

MATERIAL CONVEYING


FEEDER

There are now two types of feeder developed for the SIMPORTER. The latest development marries proven vertical screw feeder techniques with the twin belt system. This development increases the efficiency of the SIMPORTER when handling non-free flowing, difficult to handle materials such as Soy Bean meal.

The original horizontal feeder consists of a rotating shaft fitted with a multibladed paddle flanked by 2 screw sections, one with right hand and one with left hand flights. The arrangement enables material in the hold to be conveyed to the central section of the feeder from which it is projected between the two belts.


The horizontal feeder has, dependant on the material being handled, two specific types. The first is the conventional "fixed speed" type, which is provided to suit particular products. The second is a variable speed feeder for use where the SIMPORTER will be required to unload a variety of products. The feeder outer screw sections can run at a different speed to the main paddles.

This feature is particularly useful where it is required to vary the throughput of the unloader or where there is the occasional requirement to unload poorer flowing materials It is used to adjust the unloading characteristics of the SIMPORTER to achieve the maximum capacity for each individual product and capacity required.


VERTICAL ELEVATOR LEG

Elevator leg structure is manufactured from substantial steel sections to give rigidity, to enclose and support the patented air-conveyor system and the feeder. External trip wires prevent collision between elevator leg and the sides of the ship's hold.

The kick-in and kick-out movements of the elevator leg are effected by means of hydraulic cylinders mounted to the top of the elevator leg.


HORIZONTAL BOOM

The boom consists of steel sections and plates along with a weatherproof cover for the upper part of the twin-belt conveyor assembly and is complete with walkways. The boom carries a counterweight at its rear end and pivots around a shaft supported by bearings contained at the apex of an 'A' frame.

Luffing of the boom is carried out through the use of hydraulic cylinders. The whole boom assembly, including the 'A' frame, is carried on its portal base by means of a slewing ring with integral gear teeth. Each of the two slewing drive assemblies, set diametrically opposite to each other, comprises a vertically mounted hydraulic motor with brake unit.


HORIZONTAL CONVEYOR

The conveying parts in the horizontal boom are arranged as shown on figure on the left.

The two belts travel along the boom at a variable speed of about 5 m/s. As the cargo is fully enclosed between the belts, there is no dust production, and no product damage or loss.

Pulleys and shafts are calculated and manufactured in EC, to the highest ISO standards under the 'heavy-duty' classification.

Bearings for idler and pulleys are SKF spherical roller designed for a 50.000 hrs life and protected from water/dust ingress by seals “for life”.

Every rotating part is carefully statically and dynamically balanced before assembly.

Conveyor equipped with underspeed sensors, belt tear and belt alignment sensors.


The material is then discharged by gravity from the twin-belt system through a series of chutes to the quayside conveyor system and/or to trucks..

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