Electromagnetic Pile Coupling for Controlled Magnetic Attraction
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Solution Overview
Problem
Existing pile installation systems face safety and efficiency issues due to manual handling of heavy components, magnetic attraction problems, and mechanical damage from vibrations, which complicates the positioning and release of end members during pile installation.
Innovation Solution
A pile installation system utilizing an electromagnetic device with an annular coil to provide a controllable magnetic coupling between the pile installation tool and end member, allowing for safe and ergonomic handling, automated connection, and reduced attraction to steel parts, along with a remote operation capability to enhance safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If permanent magnets are used to attach the end member to the pile installation tool, then the end member can be held in position, but the magnetic force causes continuous attraction of steel parts which is troublesome and causes demagnetisation during vibration or piling
Solution Approach 1:
The patent transitions from static permanent magnets to a dynamic electromagnetic system where the magnetic field can be activated and deactivated. The electromagnetic device allows the magnetic attraction force to be applied only when needed (during positioning and installation) and released when not needed, preventing demagnetisation and continuous unwanted attraction. This dynamic control resolves the contradiction between maintaining reliable magnetic coupling and avoiding harmful continuous attraction.
Solution Approach 2:
The patent changes the parameter of magnetic field strength from constant (permanent magnets) to variable (electromagnetic field). By controlling the current through the coil, the magnetic attraction force can be adjusted and completely deactivated when not required. This parameter change allows the system to provide strong magnetic coupling during positioning while avoiding continuous attraction during other operations, resolving the reliability issue.
2Force
If permanent magnets are embedded in the pile installation tool, then the end member can be magnetically attached, but the pile installation tool needs to be modified to integrate the permanent magnets and the magnets can be mechanically damaged during drilling/vibrating/piling
Solution Approach 1:
The patent separates the magnetic coupling function from the pile installation tool by using an independent electromagnetic device with a coil that can be positioned around the tool. This segmentation allows the tool to remain unchanged while the electromagnetic device provides the magnetic attraction force. The coil is mounted on a support structure that positions it independently, avoiding the need to modify the tool structure and reducing the risk of mechanical damage to magnetic components.
Solution Approach 2:
The patent introduces an intermediary electromagnetic device between the pile installation tool and the end member. Instead of embedding magnets directly in the tool, the electromagnetic field acts as an intermediary that provides magnetic coupling without requiring permanent magnets to be integrated into the tool structure. This intermediary approach avoids tool modification and protects magnetic components from mechanical damage.
3Ease of operation
If manual handling of the end member is used during vertical movement of the pile installation tool, then positioning can be performed, but safety and ergonomics are compromised due to the heavy weight
Solution Approach 1:
The patent replaces the manual mechanical handling system with an electromagnetic holding system. Instead of personnel manually supporting and positioning the heavy end member, the electromagnetic device provides magnetic attraction force to hold the end member in position during vertical movement. This substitution eliminates the need for manual handling, improving safety and ergonomics while maintaining precise positioning capability.
Solution Approach 2:
The electromagnetic attraction force acts as a counterweight force to the gravitational force on the end member. During vertical movement, the magnetic force compensates for the weight of the end member, allowing it to be held stationary relative to the tool without manual support. This counterbalancing effect eliminates the ergonomic problems associated with manual handling of heavy components.
4Extent of automation
If the electromagnetic device is used to couple the end member to the pile installation tool, then automated positioning and safe handling are improved, but the device complexity increases due to the electromagnetic system
Solution Approach 1:
The electromagnetic device serves multiple functions: it provides magnetic attraction for holding the end member during positioning, maintains coupling during vertical movement, and can be deactivated to allow release. This multi-functionality justifies the added complexity by consolidating several operations into a single device that improves automation and safety.
Solution Approach 2:
The electromagnetic device enables self-service positioning where the system automatically maintains the end member in position through magnetic attraction without requiring continuous manual intervention. The electromagnetic field provides continuous holding force during vertical movement, allowing the system to service itself rather than requiring external manual support, thereby improving automation despite the added 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
The system improves safety and ergonomics by allowing controlled and automated positioning of end members, reducing manual handling risks and mechanical damage, while enabling efficient pile installation with reduced unwanted attraction to steel parts, and facilitating integration with positioning systems like GNSS.
Implementation Method 1
an electromagnetic device (14) for releasable magnetically coupling the end member (12) to the pile installation tool (4), wherein the electromagnetic device (14) comprises an annular coil (15) that extends around the pile installation tool (4)
Implementation Method 2
The electromagnetic system provides a controllable magnetic attraction force between the pile installation tool and the end member
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
The invention relates to a pile installation system for providing a pile in the ground, comprising; -an elongate pile installation tool for forming a bore hole and having a distal end, -an end member for coupling to the distal end of the pile installation tool, and -an electromagnetic device for releasable magnetically coupling the end member to the pile installation tool.