Filling Tube Closure Flaps for Soil Column Formation
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Solution Overview
Problem
Existing filling tubes with closure devices struggle to efficiently create high-quality filling material columns with larger diameters due to issues with opening and closing, affecting the structure and strength of the columns.
Innovation Solution
The filling tube design incorporates a central support element for the closure flaps, allowing for a greater degree of freedom in flap design, enabling larger diameters and non-circular shapes, with multiple flaps distributed around the circumference to distribute load evenly and ensure reliable opening and closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the filling tube diameter is increased to create larger filling material columns, then the load-bearing capacity and stabilization effect are improved, but the closure device reliability deteriorates due to difficulties in opening and closing
Solution Approach 1:
The closure flaps are divided into multiple segments (at least two closure flaps) that can independently pivot open and closed. This segmentation allows each flap to handle a portion of the total load, making the closure device more reliable for larger diameter tubes where a single flap would be overwhelmed by the forces involved in opening and closing.
Solution Approach 2:
The closure flaps are designed as dynamic elements that can pivot between closed and open positions rather than being fixed. This dynamic capability allows the closure device to adapt to the forces generated during insertion and extraction of the filling tube, maintaining reliability across different tube diameters including larger ones.
2Ease of operation
If the closure flaps are designed to open and close automatically using frictional forces, then the ease of operation is improved, but the manufacturing precision deteriorates due to inconsistent structure and strength
Solution Approach 1:
The closure device is designed to open and close automatically using the frictional forces generated during the filling tube's insertion and extraction without requiring external actuation. The closure flaps self-regulate their position based on the frictional interaction with the filling material and tube wall, eliminating the need for complex control mechanisms while maintaining consistent structural outcomes.
Solution Approach 2:
The design allows the closure flaps to adapt their positioning and sealing characteristics based on the frictional forces encountered during operation. By designing the flaps to respond to varying friction conditions, the system maintains manufacturing precision across different operating conditions and filling material types.
3Reliability
If the closure flaps are made larger to cover the entire tube opening, then the sealing effectiveness is improved, but the device complexity increases due to the difficulty of opening and closing
Solution Approach 1:
Instead of using a single large closure flap, the opening is divided into multiple smaller closure flaps (at least two). Each flap covers a portion of the tube opening and can pivot independently. This segmentation maintains sealing effectiveness while reducing the complexity of the pivot mechanism and making opening and closing more manageable even for larger diameter tubes.
Solution Approach 2:
The closure flaps are designed as simple pivotable elements rather than complex mechanical shutters. This dynamic, minimal-mechanism approach achieves reliable sealing through the natural pivoting motion and frictional forces, avoiding the need for complex actuators, springs, or locking mechanisms that would increase device complexity.
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 allows for the creation of consistently strong and reliable filling material columns with larger diameters and non-circular cross-sections, enhancing the structure and service life of the filling tube while ensuring efficient material introduction.
Implementation Method 1
a vibration drive for shaking the filling tube into the ground
Implementation Method 2
the two closure flaps close due to the acting frictional forces
Data Source
Figure 1a~1e
Figure 2a~2e
AI summary
The invention relates to a filling tube for creating a column of material in the ground, comprising a tube body at the lower end of which a closure device with pivotally hinged closure flaps is arranged. When the filling tube is inserted into the ground, the closure flaps assume a closed position in which the tube body is closed at the bottom and the flaps form an inlet point. When the filling tube is withdrawn from the ground, the closure flaps assume an open position in which the tube body is open at the bottom, allowing material to be introduced from the tube body into the ground to form the column. According to the invention, the closure device has at least one support element located in a central region at the lower end of the tube body, and the closure flaps bear against the support element in the closed position.Furthermore, according to the invention, the closure device has three or more closure flaps which are arranged distributed around the circumference of a lower edge of the tube body.