Segmented Drilling Tool for Wall Lamellae
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Solution Overview
Problem
Existing soil cultivation devices face challenges in producing vertical wall slats with adequate sealing and minimal wear, particularly due to the risk of drilling tools running into the ground and experiencing significant transverse and bending forces, which leads to wear and tear on conveyor spirals and pivot bearings.
Innovation Solution
A soil cultivation device with elongated drilling and mixing tools featuring a lower helix with half to two helix revolutions for reduced friction, transverse yokes connecting the tools for increased rigidity, and a mobile carrier device with a rotary drive, along with additional mixing elements and a removal device, allows for efficient production of wall lamellae with minimized wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the length of the drilling and mixing tools is increased to produce deeper walls, then the productivity and depth capability are improved, but the risk of tools running into the ground increases and transverse and bending forces are exacerbated
Solution Approach 1:
The drilling and mixing tool is divided into multiple sections that can be connected in series. Each section has its own drive unit and conveyor helix, allowing the tool to maintain stability while achieving greater depth through modular extension rather than using a single long tool.
Solution Approach 2:
Intermediate connection elements with bearing supports are introduced between the drilling sections. These intermediaries provide structural support and reduce bending moments, enabling deeper drilling while maintaining tool reliability and reducing the risk of tools running into the ground.
2Productivity
If the length of the drilling and mixing tools is increased, then the productivity is improved, but the wear and tear on conveyor spirals, rod-shaped base body and pivot bearings increases
Solution Approach 1:
The tool is segmented into multiple shorter sections rather than one long tool. Each section has reduced wear on its components, and the modular design allows individual sections to be replaced or maintained independently, extending the overall system lifespan while maintaining productivity.
Solution Approach 2:
The tool configuration is made dynamic and adaptable. Sections can be added or removed based on drilling depth requirements, and the modular design allows for easier maintenance and replacement of worn components, optimizing the balance between productivity and tool lifespan.
3Reliability
If transverse forces occur during drilling due to rock or rock fragments, then the sealing function may be affected, but the wear on conveyor spirals, rod-shaped base bodies and bearings is distributed over all drilling and mixing tools
Solution Approach 1:
The drilling system is divided into multiple independent sections, each capable of handling transverse forces locally. This segmentation prevents the propagation of forces throughout the entire tool length, maintaining sealing integrity while managing the complexity through modular design.
Solution Approach 2:
The tool arrangement incorporates dynamic elements that can adapt to transverse forces. The modular design allows each section to respond independently to local conditions, maintaining overall system reliability without requiring overly complex rigid structures.
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 enables efficient production of wall lamellae with reduced wear on drilling and mixing tools, improved sealing, and effective mixing of soil material with binder suspension, while minimizing friction and wear, thus enhancing the operational efficiency and durability of the equipment.
Implementation Method 1
the frictional wear that occurs there is also low
Implementation Method 2
ground material is removed and the removed ground material is mixed with a supplied binder suspension to form a ground mortar
Data Source
Figure 1
AI summary
The application relates to a soil cultivation device and a method for producing wall lamellae in soil with the soil cultivation device having at least two parallel, elongated drilling and mixing tools (20), each comprising a rod-shaped base body (22) on which a first conveying helix (24) and at least a second conveying helix (26) are arranged, the latter being axially spaced from the first conveying helix (24), wherein at least on one drilling and mixing tool (20) the first conveying helix (24) is formed at a lower end with an outer diameter which is larger than an outer diameter of the second conveying helix (26), which is arranged above the first conveying helix (24).