Bulk Cargo |||
Safety||| Self unloaders
Conveyor belt installation guide for self- unloading bulk carriers
New belts are normally installed by Motors Technicians, however the following points are to be noted
when handling a new belt:
Stowage of a spare or new belt;
A stand is to be fabricated so that the roll of the belt is resting on a bar or pipe, passed through
the centre of the roll.
- The stand is to be constructed so that the belt is clear of the deck.
- The belt is to be wrapped in plastic or canvas to protect it from moisture and mechanical damage.
- It must not be stowed in a place where hotwork is frequently carried out.
- The hoisting bar is to be passed through the centre of the crate (belt); and a spreader used when
- The crate is to be rolled in the direction of the arrow marked on the face of the crate; rolling in
the opposite direction will loosen or telescope the belt.
- The belt is factory rolled with its carrying side out.
- The hoisting bar acts as part of a ‘de-reeling stand’, on which the new belt is placed before
threading onto the conveyor.
- If the belt is required to be laid out keep the bends as large as possible; and ensure that it does
not kink, and no undue strain is applied. No weights are to be placed on the laid out belt. Folds
in the belt remain latent, only to manifest as fractures in the carcase during use.
- Do not drag the belt. While feeding the belt onto the carriage, use the de-reeling arrangement,
and make sure that it is not being pulled over any broken roller etc.
- Clear and clean the area where the belt splicing is to be carried out
After installation of a new belt, the running-in procedure is very important, and this can have a
significant effect on the life of the belt. Therefore, the proper procedure has to be followed:
- Check that all tools and equipment have been removed from the new belt and surrounding area
- Check that all pull cords have been reconnected and that pull cord switches have been reset.
- Open the hydraulic valve to the tensioning cylinder and switch on the tensioning pump motor.
- Check the splice area when tension is applied.
- Check tensioning of carriage and associated wire ropes.
- Check all personnel are clear of the belt and start it in the “manual” mode having a man stand by
the switch box.
- Observe the tracking of the belt and stop it immediately if the belt runs rapidly off track.
- Carry out training adjustments as required to the rollers and/or pulleys.
- Stop the belt and check the splice area again.
- Re-install and tension the belt scrapers.
- Run the belt again and check splice area.
- Observe the belt closely during the first discharge of cargo, as the belt may track differently when
loaded with cargo.
Belt checks, tracking and training
The term “tracking” applies to the running alignment of a conveyor belt. The term “training” applies to
the adjustments carried out to track the belt correctly.
When a belt is tracking correctly it is running in the centre of its track and is therefore free from edge
contact with steel work. A correctly trained belt will not make contact with the side guide rollers,
except in the case of the Flexowell Lift Belts where the belt is always in contact with the rubber side
guide wheels. A conveyor belt must not be operated if the edge of the belt is in contact with any
steelwork, as this will cause serious damage to the belt.
When a new belt has been fitted it is often necessary to carry out some “training” adjustments. The
pillow block bearings fitted to the spindles of all the large diameter pulleys in the belt system have
slotted holes for their base bolts. There are also jacking screws fitted at each bearing base. This
allows the lateral alignment of the pulleys to be adjusted. The brackets supporting the return rollers
are also slotted for the same reason, as are the carriage frames.
Cargo holds bulk flow gate, basket gate & non - consolidated feeder
Our detail pages illustrated many safety aspects of Bulk carrier
- Self unloader components
Function of loop & bucket belt elevators
Self unloaders various cargo handling gears
Dealing with self unloaders stalled lift belt
Conveyor belt construction & troubleshoot guide
Conveyor belt installation guide
Conveyor belt repair & maintenence guide
Safe working practice onboard self unloading bulk carriers
- Preventing conveyor belt fire onboard self unloading bulk carriers
- Cargo work safety precautions
- Various bulk cargoes - free flow ability
- Various bulk cargoes & dealing with cargo hang ups
- Navigation in
Ice & safety precautions
- Dust suppression procedure & environment protection
- Preparations for cargo planning, handling & stowage
- Maintaining safe stability onboard self-unloading bulk carriers
- Procedure for bulk cargo handling prior to and during loading
- Loading operations - voyage orders, draft restrictions, various grades and rates
- Loading sequence and other related considerations
- Preparations for discharging & related guideline
- Safety precautions for boom operation
- Directing gate operation, gate problems & crew duties
- Cargo holds/ tunnels cleaning, maintenance and check items
- Procedure for transporting coal on self- unloading bulk carriers
Home page |||Bulk carrier types
Handling of bulk coal |||Cargo planning
Carriage of grain
|||Risk of iron ores
|||Self unloading bulk carriers
|||Care of cargo & vessel
|||Cargoes that may liquefy
|||Suitability of ships
|||Ballast handling procedure
|||Bulk carrier safety
|||Fire fighting systems
|||Bulk carrier General arrangement
Operation of sea going bulk carriers involved numerous hazards . Careful planning and exercising due caution for all critical shipboard matters are important . This site is a quick reference to international shipping community with guidance and information on the loading and discharging of modern bulk carriers so as to remain within the limitations as specified by the classification society.
It is vital to reduce the likelihood of over-stressing the ship's structure and also complying with all essential safety measures for a safe passage at sea. Our detail pages contain various bulk carrier related topics that might be useful for people working on board and those who working ashore in the terminal. For any remarks please
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