Movable Discharge Belt for Mobile Drum Screening Machines
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Solution Overview
Problem
Existing mobile drum screening machines are limited by road transport dimensions, restricting the maximum screen drum diameter and thus the screening performance due to the need for clearance and discharge belt placement.
Innovation Solution
The discharge belt is designed to move from a working position next to the screening drum into a transport position outside the drum area, allowing a larger drum diameter while maintaining compliance with vehicle width limits, and can be coupled with the axle unit for movement without obstructing the chassis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the discharge belt is positioned laterally next to the screening drum to enable material discharge, then the discharge function is achieved, but the housing side walls cannot be enlarged to maximum vehicle width, limiting the screen drum diameter
Solution Approach 1:
The discharge belt is designed to be movable rather than fixed, allowing it to transition between a working position next to the screening drum during operation and a retracted position that clears the maximum vehicle width during transport. This dynamic positioning resolves the contradiction by enabling both adequate drum diameter and compliance with road dimensions.
Solution Approach 2:
The discharge belt is arranged to extend in the longitudinal direction of the vehicle rather than being confined to the lateral dimension. By positioning the discharge belt to run along the length of the vehicle body, the design allows the housing side walls to extend to maximum width while the discharge belt occupies longitudinal space, thereby enabling larger screen drum diameters without exceeding vehicle width limits.
2Productivity
If a larger screen drum diameter is installed to increase screening capacity, then the screening performance improves, but the distance between the drum and outer wall must be maintained, preventing maximum width utilization
Solution Approach 1:
The discharge belt is repositioned to extend longitudinally along the vehicle rather than laterally across the width. This dimensional change allows the housing side walls to reach maximum vehicle width, creating space for larger screen drums while the discharge belt occupies the longitudinal dimension, thus resolving the width constraint.
Solution Approach 2:
The movable discharge belt can be positioned to clear the maximum vehicle width during transport while maintaining its discharge function during operation. This dynamic adjustment allows the housing to be designed with maximum width dimensions, accommodating larger screen drums for increased screening capacity.
3Length of stationary object
If the discharge belt is made foldable to enable compact transport, then the transport dimensions are reduced, but the complexity of the belt mechanism increases
Solution Approach 1:
The discharge belt incorporates a movable or foldable mechanism that allows it to be repositioned between working and transport configurations. This dynamic design enables the belt to clear the maximum vehicle width during transport while maintaining its lateral discharge position during operation, accepting increased mechanism complexity as a trade-off for achieving maximum drum diameter.
Data Source
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AI summary
The device e.g. drum screen machine (10), has a rotatably mounted screen drum (12) driven with a rotary movement by a drive unit. The screen drum is arranged on a carriage (20) with an axle unit (24). A feed hopper (14) is provided upstream to the screen drum, and a discharging transport belt (18) is arranged laterally to a longitudinal direction of the screen drum. The discharging transport belt is laterally moved adjacent to the screen drum from a working position into a transport position and rests outside of an area of the screen drum.