Trough Belt Conveyor Guide Surfaces with Material Drop Passages
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Solution Overview
Problem
Trough belt conveyors face issues with fine particles escaping through gaps between the conveyor belt and side guides, leading to wear, friction, and dust formation, particularly when transporting bulk materials like sand, gravel, and coal.
Innovation Solution
The implementation of trough forming guide surfaces with passages allows material caught between the conveyor belt and the guide surfaces to drop through, reducing wear and friction, and the use of rollers under the transition from the lower to the upper section prevents belt overstretching, enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If side guides are used to contain bulk material, then material containment is improved, but wear and dust formation increase due to fine particles being dragged along between the belt and side guides
Solution Approach 1:
The side guide structure is segmented into modular components with passages between them, allowing material to drop through rather than being dragged along the entire length. This segmentation breaks the continuous contact that causes wear and dust formation.
Solution Approach 2:
Passages are introduced into the side guide structure to extract and remove fine particles from the contact zone between the belt and side guides. These passages allow material to escape laterally, preventing it from being dragged along and reducing wear and dust generation.
2Reliability
If the conveyor belt is tensioned tightly to maintain trough shape, then material containment is improved, but belt durability decreases due to overstretching during transitions
Solution Approach 1:
Rollers are positioned at transition zones to provide support before the belt enters steep sections. This beforehand cushioning prevents the belt from overstretching during transitions by maintaining proper tension distribution and allowing controlled bending.
Solution Approach 2:
The belt tension and curvature parameters are dynamically managed through strategically placed rollers that adjust the belt's physical state during transitions. The rollers create localized changes in belt curvature and tension, allowing the belt to navigate transitions without excessive stretching while maintaining overall trough shape for material containment.
3Reliability
If trough forming guide surfaces are added to improve material containment, then device complexity increases, but manufacturing versatility is improved
Solution Approach 1:
The trough forming guide surfaces are designed as universal components that can be applied to various conveyor belt configurations and material types. The same basic guide surface design with passages works for different belt widths and material characteristics, reducing overall system complexity despite the added functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces the distance particles are dragged, minimizing wear and friction on the conveyor belt and deck, while allowing for easy conversion between trough and flat belt conveyor versions, thereby improving the reliability and durability of the system.
Implementation Method 1
at least one roller is provided, which has a horizontal axis of rotation perpendicular to the transport path and has a circumference of which a section projects upwardly from the transport deck, so that the trough is locally shallow or absent in a section of the belt above the roller. Thus the belt is allowed to bend from the lower section to the less steep upper section without overstretching over outer portions of the belt.
Data Source
AI summary
Trough belt conveyor having a flexible conveyor belt loop (6) tensioned around end pulleys (3, 4). Trough forming surfaces (12) are provided under opposite side edge portions (11) of a transport section (7) of the belt (6) and are inclined upward from the transport deck (9) in a laterally outward direction transverse to the transport path (8). The transport section (7) of the belt (6) rests on the transport deck (9) and on the trough forming guide surfaces (12) so as to form a trough extending along the transport path (8). Passages (14) are provided at least in the trough forming guide surfaces (12) or in zones of the transport deck (9) along the trough forming guide surfaces (12), for allowing material caught between the conveyor belt (6) and the trough forming guide surfaces (12) to drop through the guide surfaces (12) or the transport deck (9).