Screen Tensioning Link for Mobile Multi-Deck Screening Devices
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Solution Overview
Problem
Mobile multi-deck screening devices face challenges in reducing height for transport while enabling easy screen media replacement, particularly due to heavy media that requires manual handling and complex tensioning systems, which are cumbersome and prone to jamming.
Innovation Solution
A screen medium side tensioner system using linear tension rods and a tensioning link with an adjusting member and retractor, allowing for easy engagement and disengagement of screen media from outside the device, facilitated by a guide and sealing mechanism to prevent material leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If end tensioning systems with tightening bolts and tensioning irons are used, then screen media can be tensioned, but the system becomes complex and requires manual entry into the device for operation
Solution Approach 1:
The tensioning system is divided into modular components: tensioning links connect to screen media at multiple points, linear tension rods provide adjustable tension, and retractors enable automatic retraction. This segmentation allows each component to perform a specific function and enables operation from outside the device.
Solution Approach 2:
Instead of requiring manual entry into the device to operate tensioning bolts as in conventional systems, the patent inverts the approach by enabling operation from outside the device. The adjusting members and retractors are positioned and configured to be accessible from the exterior, eliminating the need for manual entry.
2Reliability
If screen media are made heavy for abrasion resistance, then durability improves, but manual handling becomes difficult and requires lifting machines
Solution Approach 1:
The tensioning system incorporates retractors that automatically retract the tensioning links when tension is released. This self-service mechanism eliminates the need for manual intervention to disengage the screen media from the tensioning system, making handling easier even though the media remains heavy for durability.
3Length of stationary object
If the device height is reduced for transport under bridges, then transportability improves, but screen media replacement becomes more difficult
Solution Approach 1:
The tensioning system is designed to operate from the horizontal dimension (outside the device) rather than requiring vertical access (manual entry). The adjusting members and tensioning components are positioned laterally accessible, allowing operation without increasing device height, thus maintaining compactness for transport while enabling easy replacement.
4Ease of repair
If tensioning irons are manually separated inside the screening device, then screen media can be detached, but the process becomes complex and prone to jamming
Solution Approach 1:
The tensioning links are designed to be extractible from the screen media from outside the device. The connection mechanism allows the tensioning links to be detached by retracting them outward, eliminating the need for manual separation inside the screening device and reducing the risk of jamming.
Data Source
AI summary
A screen medium of a mobile multi-deck screen is tensioned with a tensioner. A tensioning link engages and tensions a screen medium on a side thereof by at least two linear tension rods, when the screen medium side tensioner is installed to the mobile multi-deck screening device. An adjusting member causes for each of the at least two linear tension rods, a linear movement tensioning by the tensioning link the side of the screen medium above the two linear tension rods. A retractor disengages the tensioning link responsively to untightening the at least two tensioning rods. A screen deck, a screen and a mobile multi-deck screening device are also disclosed as well as a method for replacing a screen medium using the tensioner.