Road Finisher Spraying Device for Sub-base Moistening
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Solution Overview
Problem
The surface quality and stability of substructure layers in road construction are compromised due to loose bulk materials without binding agents, leading to negative consequences from vehicles driving on them during moistening and compaction processes.
Innovation Solution
A road finisher equipped with a spray device that moistens substructure bulk materials before smoothing and compaction, reducing the need for additional vehicles to drive on the substructure, and featuring adjustable outlet devices for precise liquid distribution, including water, to improve surface quality and reduce dust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If tank trucks drive over the sub-base to moisten it, then the sub-base can be moistened, but the surface quality and stability of the sub-base are compromised
Solution Approach 1:
The patent introduces a spraying device as an intermediary mechanism to deliver liquid to the sub-base material. Instead of vehicles driving directly on the material to moisten it, the spraying device distributes liquid through outlets onto the material as it is being conveyed and smoothed, eliminating the need for subsequent vehicle traffic and thus preserving surface quality.
Solution Approach 2:
The spraying device performs the moistening action in advance, during the material conveyance and smoothing process itself. By applying liquid before the material is laid and compacted, the system eliminates the need for later moistening operations that would require vehicle traffic on the finished surface.
2Productivity
If vehicles drive over the sub-base for compaction and moistening, then the sub-base can be prepared, but dust is stirred up and surface quality deteriorates
Solution Approach 1:
The spraying device serves as an intermediary that delivers liquid directly to the sub-base material during the conveying process. This eliminates the need for separate vehicle-based moistening and compaction operations, thereby preventing dust generation from vehicle traffic while maintaining preparation efficiency.
Solution Approach 2:
The patent combines the moistening function with the material conveyance and smoothing operations. The spraying device is integrated into the road paver system, merging multiple functions (conveyance, smoothing, and moistening) into a single coordinated process, eliminating the need for separate vehicle operations that would generate dust.
3Reliability
If multiple vehicles are used for moistening and compaction, then the sub-base can be properly prepared, but the complexity of the construction process increases
Solution Approach 1:
The road paver system is enhanced with multi-functionality by integrating a spraying device that performs moistening during the material laying process. This eliminates the need for separate tank trucks and compaction vehicles, reducing the number of different equipment types required while maintaining preparation quality through the unified system.
Solution Approach 2:
The patent merges the functions of material conveyance, smoothing, and moistening into a single integrated road paver system. The spraying device is combined with the existing conveyance and smoothing mechanisms, eliminating the need for multiple separate vehicles and simplifying the overall construction process while maintaining reliability.
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 solution enhances the surface quality and stability of substructure layers by minimizing vehicle traffic and dust, allowing for more precise and efficient application of liquids during the construction process.
Implementation Method 1
a spraying device (10) designed to spray liquid into the tunnel (26)
Implementation Method 2
The stirring up of dust is reduced
Data Source
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AI summary
The application relates to a road paver (1) comprising a tractor (2) with a material hopper (5) and a machine frame (4). The machine frame (4) is pivotally connected to a screed (3) by means of drawbars (6), and a material distribution screw (8) is arranged in a space (7) between the tractor (2) and the screed (3). A longitudinal conveying device (22) runs through a tunnel (26) between the material hopper (5) and the space (7). The road paver is characterized by a spraying device (10) designed to spray a liquid into the space (7) between the tractor (2) and the screed (3), into the tunnel (26), or into the material hopper (5).