To align belt travel, at times, troughed idlers having its side idlers tilted to a small angle not more than 3°, are used. However, this tilted rollers cause the belt to wear rapidly, hence should be used with caution.
(i) Conveyor structure: The structure supporting the pulleys and idlers consists of suitable sized channel stringers, with supporting legs to the main structure or floor. For long conveyors, lightweight truss sections are used that permit longer spans between supporting legs, and economical structural cost. A decking is provided to allow return run of the belt which also lends lateral rigidity to the structure. For long centre conveyors, sidewalk ways are provided for inspection and adjustment to idlers. The structures are often covered by tin plate at the top and sides to protect the materials being conveyed under the sky outside the plant. Fig. 6.1.11 shows photographs of two long centre conveyors with their covered structures, side walks etc.
To align belt travel, at times, troughed idlers having its side idlers tilted to a small angle not more than 3°, are used. However, this tilted rollers cause the belt to wear rapidly, hence should be used with caution.
(i) Conveyor structure: The structure supporting the pulleys and idlers consists of suitable sized channel stringers, with supporting legs to the main structure or floor. For long conveyors, lightweight truss sections are used that permit longer spans between supporting legs, and economical structural cost. A decking is provided to allow return run of the belt which also lends lateral rigidity to the structure. For long centre conveyors, sidewalk ways are provided for inspection and adjustment to idlers. The structures are often covered by tin plate at the top and sides to protect the materials being conveyed under the sky outside the plant. Fig. 6.1.11 shows photographs of two long centre conveyors with their covered structures, side walks etc.
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