Conveyor Belt Scraper Segmented Strip Fastening
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Solution Overview
Problem
Existing conveyor belt scrapers with flexible scraper strips face challenges in providing sufficient support under high loads and facilitating easy detachment due to the elastic properties of the strips, which restrict access and require large forces for removal.
Innovation Solution
The scraper design features strip sections with pockets that receive fastening lugs in a form-fitting manner, equipped with latching recesses on radial end faces and tangentially positioned passage openings for a lever tool, allowing secure hold and easy detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the scraper strip is made flexurally elastic to adapt to the conveyor belt course, then the adaptability is improved, but the support capability under high load deteriorates
Solution Approach 1:
The scraper strip is divided into multiple individual strip sections (3) that can be independently attached to the carrier. Each strip section maintains the flexible material properties for adapting to the conveyor belt course, while the segmented structure with individual fastening lugs (4) allows each section to provide localized support under load without compromising the overall flexibility of the scraper assembly.
2Reliability
If the latching connection between strip sections and fastening lugs is strengthened to provide secure hold, then the reliability is improved, but the ease of detachment deteriorates
Solution Approach 1:
A lever tool is introduced as an intermediary to facilitate the detachment process. The lever tool is inserted through the passage opening (10) in the strip section and used to pry off the latching body (8) from the latching recess (9), providing mechanical advantage to overcome the latching connection without requiring excessive force or complex operations.
Solution Approach 2:
The passage opening (10) is pre-formed in the strip section to provide access for the lever tool. This preliminary structural feature enables easy detachment by allowing the lever tool to be inserted and applied to the latching body, making the detachment process straightforward while maintaining a secure latched state during normal operation.
3Strength
If the pocket depth is increased to improve the form-fitting hold, then the support capability is improved, but the flexibility of the strip section deteriorates
Solution Approach 1:
Instead of using a deep pocket that would significantly reduce flexibility, the invention uses a comparatively small pocket depth (6) combined with additional support features. The support surfaces (7) on both sides of the fastening lug provide extra support and stability, allowing the pocket to be shallower while still achieving adequate form-fitting hold and support capability.
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 ensures secure attachment and easy removal of strip sections without compromising the flexible material properties, meeting high load requirements and simplifying the production process.
Implementation Method 1
Due to the flexurally elastic properties of the wiping strip, the latching bodies engage resiliently in the latching recesses when the strip sections are slipped onto the fastening attachments in the radial direction.
Data Source
Figure 1
Figure 2
AI summary
The scraper has a carrier (1) for a bending-elastic scraper strip (2) made from strip sections (3) which are adjacent to each other in carrier longitudinal direction, where the strip sections stand radially to the carrier. The strip sections are locked from the fastening projections (4) over a holding body (8) engaged in the holding recesses (9). The strip sections form the pockets (6) for receiving the fastening projection in a form-fit manner. The pockets are provided on a broad side of the holding recesses for holding body provided from the radial front sides of the fastening projections.