Mast and Grapple Combination for Pile Handling
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Solution Overview
Problem
Current methods for picking up and positioning piles before driving them with a pile driver are inefficient, relying on rigging cables and hoists which can be unsafe and limited in versatility.
Innovation Solution
A mast and grapple combination featuring a mast with a carriage that travels along it, a grapple with jaws that open and close and rotate, and additional mechanisms for pivotal movement and centralization, allowing for safe and precise handling of piles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigging cables and hoists are used to pick up and position piles, then the equipment can handle piles, but the operation is unsafe and limited in versatility
Solution Approach 1:
The grapple assembly is designed to perform multiple functions: gripping piles, rotating to orient them vertically, and pivoting laterally to position them beside the mast. This multi-functional design replaces the need for separate rigging cables and hoists, providing both safety and versatility in one integrated system
2Ease of operation
If a grapple with rotating jaws is used, then the pile can be oriented vertically, but the device complexity increases
Solution Approach 1:
The rotation mechanism is integrated directly into the grapple assembly, combining the gripping function and orientation function in a single unit. This merging reduces the need for separate positioning mechanisms and simplifies the overall system while maintaining precise control over pile orientation
3Manufacturing precision
If pile stabilizing arms with grippers are added, then the remote end of the pile can be controlled, but the device complexity increases
Solution Approach 1:
The pile handling system is divided into segmented components: the grapple assembly for end-gripping and orientation, and separate stabilizing arms with grippers for controlling the remote end. This segmentation allows each component to perform its specific function independently, improving positioning precision while keeping the overall system manageable through modular design
Data Source
AI summary
A mast and grapple combination includes a mast and a grapple. The mast has a first end (lower end) and a second end (upper end). A carriage travels along the mast from the first end toward the second end. The grapple is carried by the carriage. The grapple has jaws which open and close, and is mounted for rotation about a transverse axis relative to the carriage. A jaw drive mechanism controls operation of the jaws, such that the jaws are movable to an open position to receive a pile and a closed position to grip the pile. A jaw orientation drive mechanism controls rotation of the jaws about the transverse axis, thereby changing the orientation of the jaws and, consequently, the orientation of the pile gripped by the jaws relative to the mast.