Percussion Tube Outlet Structure for Continuous Soil Ejection
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Solution Overview
Problem
Existing percussion tubes for drilling boreholes in the ground face challenges in efficiently removing soil material without additional effort, as the material gets trapped inside the tube and requires separate removal after extraction.
Innovation Solution
The percussion tube is designed with a front-end opening and a rear-end outlet positioned away from the striking surface, allowing soil material to be expelled during the drilling process through a longitudinal outlet channel, reducing the need for separate removal steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the percussion tube is sealed at the top during driving, then the tube structure is simple and the striking device can effectively drive the tube into the ground, but the subsoil material cannot be expelled during the driving process and accumulates inside the tube
Solution Approach 1:
The percussion tube is divided into functional zones: a sealed upper portion for receiving impact forces and an open lower portion with an outlet opening for material ejection. This segmentation allows simultaneous achievement of effective driving and material expulsion without requiring separate removal operations.
Solution Approach 2:
Instead of sealing the entire tube and removing material afterward, the invention inverts the approach by creating an outlet opening in the lower portion of the tube. This allows material to be expelled during the driving process itself, transforming the post-driving removal step into a concurrent ejection process.
2Ease of operation
If an outlet opening is provided in the percussion tube, then material can be expelled during driving, but the striking tool may temporarily close the outlet opening when striking the striking surface
Solution Approach 1:
The outlet opening is positioned in a specific location on the striking tube - in the lower portion away from the striking surface. This local positioning ensures that the outlet remains accessible for material ejection while the upper striking surface remains available for impact forces, with no spatial interference between the two functions.
3Device complexity
If the outlet opening is positioned close to the striking surface, then the structure is compact, but the striking tool temporarily blocks the outlet opening during impact
Solution Approach 1:
The outlet opening is positioned in the lower portion of the striking tube, creating a clear spatial separation between the ejection function (lower region) and the impact function (upper region). This local quality differentiation ensures that material can be expelled efficiently during driving without being blocked by the striking tool.
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 design facilitates easy expulsion of soil material during drilling, eliminating the need for additional removal efforts and minimizing material retention within the tube, enhancing operational efficiency.
Implementation Method 1
the rear area is indirectly driven into the ground in the axial direction... the striking tool does not temporarily close the outlet opening
Implementation Method 2
subsoil material pushed into the driving tube from the front (lower) end face during the driving process to be forced out through the outlet opening
Data Source
Figure 1
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AI summary
The invention relates to a driving tube (1) comprising a striking surface (7) and a straight tube (2), wherein the straight tube (2) is intended to be driven axially into the ground with its open front end facing forward by striking the striking surface (7) in the axial direction of the straight tube (2), and the impact impulse is transmitted to the straight tube (2). In a longitudinal region of the driving tube (1), which is displaced relative to the striking surface (7) towards the front end of the driving tube (2), there is an outlet opening (5) for soil material, through which the interior of the straight tube (2) is open to the surroundings.