Screen Maintenance Link for Feed Conveyor Clearance
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Solution Overview
Problem
Existing mobile vibrating screens face challenges in providing sufficient clearance for screen wire replacement when in a horizontal transport configuration due to the feed conveyor obstructing access, often requiring hydraulic actuators which are costly and inefficient.
Innovation Solution
A mechanical link system is used to elevate the feed conveyor, eliminating the need for hydraulic cylinders by leveraging screen lifting actuators and geometric changes to create ample clearance for screen maintenance without additional power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the feed conveyor is positioned in a horizontal transport configuration, then the screen can be easily transported, but the clearance for screen wire replacement is insufficient
Solution Approach 1:
The feed conveyor support is designed with dynamic positioning capability, allowing it to transition between a horizontal transport position and an elevated maintenance position. The support structure includes adjustable components that enable the feed conveyor to be raised vertically when maintenance is needed, providing adequate clearance for screen wire replacement while maintaining easy transport capability when horizontal.
2Ease of repair
If a hydraulic cylinder is used to elevate the feed conveyor for maintenance, then adequate clearance is provided, but the system complexity and cost increase
Solution Approach 1:
The system uses the existing screen lifting actuators and geometric relationships between components to automatically elevate the feed conveyor during maintenance operations. The maintenance link mechanism leverages the motion already present in the screen lifting system, converting vertical screen movement into feed conveyor elevation without requiring separate hydraulic actuators or additional power sources.
Solution Approach 2:
A maintenance link is introduced as an intermediary mechanical connection between the screen base and the feed conveyor support. This link acts as a mediator that transfers motion from the screen lifting actuators to the feed conveyor, enabling elevation of the feed conveyor during maintenance while avoiding the need for direct hydraulic actuation.
3Ease of repair
If the screen is lowered to a horizontal position for maintenance, then screen wire replacement is accessible, but the feed conveyor obstructs the top screen deck access
Solution Approach 1:
The solution addresses the obstruction problem by moving the feed conveyor support into a different spatial dimension - specifically, elevating it vertically away from the horizontal screen plane. This dimensional separation allows the screen to be lowered to horizontal for maintenance access while the feed conveyor is positioned above it, eliminating the obstruction and providing adequate clearance for screen wire replacement.
Data Source
AI summary
Disclosed is an inclined mobile screen for processing road building materials which provides for easy reconfiguration of the screen from operation configuration to a transport configuration and to a maintenance configuration, which allows for increased clearance between the screen and a feed conveyor without requiring a hydraulic actuator disposed therebetween. Nested telescopic supports are selectively coupled together in an offset connection to allow changes in the orientation of the screen to result in changes in the separation between the screen and the conveyor so as to allow for more clearance therebetween during time of maintenance.