Multifunctional Spreading Device Hopper Screed
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Solution Overview
Problem
Existing paving devices are limited in their adaptability and efficiency due to specific designs for particular aggregate materials, unstable material flow, and restricted screed assembly openings, leading to increased production costs and potential device failures.
Innovation Solution
A multifunctional spreading device with a modular hopper and conveying assembly that can accommodate various aggregate types, featuring a pivotable front hopper wall for stable material flow and a mechanically deformable screed assembly for wider layer formation, allowing easy substitution of conveying assemblies and hydraulic actuation for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a specific aggregate conveying assembly (belt conveyor or auger) is designed for a specific aggregate material, then the conveying efficiency for that material is improved, but the adaptability to different aggregate types deteriorates
Solution Approach 1:
The device employs a universal conveying assembly design that can handle multiple aggregate types (gravel, asphalt, dirt) through a single configurable system. The conveying assembly includes adjustable components and interchangeable elements that allow it to adapt its conveying mechanism based on the specific aggregate material being processed, eliminating the need for separate specialized devices for each material type.
Solution Approach 2:
The conveying assembly incorporates dynamic adjustable features including variable speed control and adjustable conveying parameters that can be modified in real-time based on the aggregate material properties. This dynamic capability allows the same physical assembly to optimize its performance for different materials without requiring complete redesign or replacement of components.
2Device complexity
If the screed assembly offers a limited opening span, then the device structure remains simple, but the maximal width of the aggregate layer being laid is reduced
Solution Approach 1:
The screed assembly is divided into multiple independent segments or sections that can be adjusted relative to each other. This segmentation allows the overall opening span to be extended while maintaining manageable complexity in each individual segment. The modular structure enables the screed to achieve greater width capability without proportionally increasing overall structural complexity.
3Adaptability or versatility
If complex crown adjustable mechanisms are used to adjust the screeding plate configuration, then the adaptability to different paving conditions is improved, but the production costs and risks of device failure increase
Solution Approach 1:
The complex crown adjustment mechanism has been simplified by extracting and separating the essential adjustment functions into independent, simpler components. Rather than using a single complex integrated mechanism, the design uses separate adjustment elements that can be independently controlled, reducing overall complexity while maintaining the ability to adapt to different paving conditions.
4Device complexity
If the hopper outlet flow is variable or unstable, then the hopper design is simpler, but the constant flow required for efficient spreading is compromised
Solution Approach 1:
The hopper outlet incorporates a feedback-controlled flow regulation system that monitors the aggregate material flow rate and automatically adjusts outlet parameters to maintain constant flow. This feedback mechanism ensures stable material discharge regardless of variations in hopper fill level or material properties, achieving flow stability without requiring overly complex hopper design.
Data Source
AI summary
A multifunctional spreading device comprising a main body, a conveying assembly and a screed assembly. The main body has a hopper including first and second lateral hopper walls and front and rear hopper walls, with a hopper outlet defined between lower ends of the hopper walls and a conveying assembly receiving cavity defined below the hopper outlet, between a first side wall and a second side wall each having a support structure projecting therefrom. The conveying assembly has an outer frame, sized and shaped to fit within the conveying assembly receiving cavity, with opposed frame walls each including an abutment member projecting therefrom and configured to abut onto the corresponding support structure to support the conveying assembly inside the conveying assembly receiving cavity. The screed assembly is mounted to the main body and extends laterally therefrom to engage and smooth aggregate material being discharged from the conveying assembly.