Conveyor Belt Scraper With Rigid Levers For Pressure Balance
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Solution Overview
Problem
Existing scraper devices for conveyor belts wear unevenly, leading to inconsistent pressure distribution and reduced scraping quality due to sagging blades and inability to adapt to varying belt shapes, resulting in poor performance on straight, concave, or convex surfaces.
Innovation Solution
A scraper device with a flexible elastomer blade and embedded rigid levers that rotate around support points, allowing for balanced pressure distribution between the center and edges, and adjustable features to accommodate different belt shapes, ensuring constant pressure and effective residue removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the blade is made flexible to adapt to belt shape, then adaptability improves, but pressure distribution becomes uneven causing inconsistent scraping quality
Solution Approach 1:
The blade is segmented into multiple independent pressing elements (first, second, and third pressing elements) that can be individually adjusted. Each pressing element can be independently positioned to ensure uniform pressure distribution across the blade width while maintaining flexibility to adapt to the belt's concave or convex shape.
Solution Approach 2:
The pressing elements are made adjustable and movable along the blade, allowing dynamic repositioning to compensate for wear and adapt to varying belt shapes. This dynamic adjustment capability ensures consistent pressure distribution regardless of blade wear or belt curvature changes.
2Productivity
If the blade wears in the center area, then scraping effectiveness in the center improves initially, but the blade sags causing edges to lose contact and overall scraping quality deteriorates
Solution Approach 1:
The blade design anticipates wear by incorporating multiple pressing elements with adjustable positions. Before wear causes sagging and loss of contact, the pressing elements can be repositioned to compensate for the wear pattern, maintaining reliable contact pressure across the entire blade width throughout the blade's service life.
Solution Approach 2:
The pressing elements can be independently adjusted in position and pressure application points. This allows changing the pressure distribution parameters along the blade length and width, compensating for wear-induced sagging and maintaining consistent contact pressure with the belt surface.
3Stress or pressure
If pressure is increased on the blade to maintain contact with the belt, then contact pressure improves, but the blade flexes more causing uneven pressure distribution and reduced scraping quality
Solution Approach 1:
By dividing the blade into multiple independent pressing elements, the total pressure can be distributed across multiple contact points. This segmentation allows maintaining high contact pressure while preventing excessive flexing of a single large blade, ensuring uniform pressure distribution across the blade width.
Solution Approach 2:
The pressing elements are designed to be adjustable and can be independently positioned to optimize pressure distribution. This dynamic capability allows maintaining adequate contact pressure while compensating for flexing, ensuring uniform pressure distribution even when overall pressure is increased.
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
The device maintains consistent pressure profiles on conveyor belts regardless of shape, compensates for wear, and adapts to straight, concave, or convex surfaces, enhancing scraping quality and efficiency by redistributing pressure effectively.
Implementation Method 1
at least two rigid levers arranged on either side of a plane of symmetry of the scraping device, said levers being capable of rotating around two axes or support points
Implementation Method 2
at least one flexible scraping blade comprising an elastomer and made of a single piece
Data Source
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Figure 3bis~4
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AI summary
The present invention relates to a device (11) for scraping a return run of a conveyor belt including: at least one flexible scraping blade (17) including an elastomer; at least two rigid levers (12) placed on both sides of a plane of symmetry (16) of the scraping device (11), said levers (12) being capable of rotating about two shafts (15) or support points such as to make it possible, during use, to balance the pressures exerted by the at least one flexible blade (17) between the edges and the middle of the conveyor belt; and a support bar (18) that supports the two shafts (15) or support points.