Rotating Conduit Extractor for Non-Destructive Slab Removal
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Solution Overview
Problem
Existing methods for extracting pathway conduits from concrete slabs are not reusable, leading to material waste and cost inefficiencies, and do not facilitate easy inclusion of reinforcing materials or filling of conduits post-installation.
Innovation Solution
A quadrangular extraction device with rotating curvature and telescopic tubes, featuring a crosshead and bolt mechanism, allows for the extraction of pathway conduits without damaging the concrete slabs, enabling reuse and easy insertion of reinforcing materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If traditional extraction methods are used to remove pathway conduits from concrete slabs, then the conduits can be removed, but the conduits are damaged and cannot be reused, leading to material waste
Solution Approach 1:
The extraction device is divided into multiple functional segments: a quadrangular main body for insertion, telescopic tubes for depth adjustment, flat bars with pointed peaks for gripping, and a crosshead for rotation. This segmentation allows each component to perform its specific function without damaging the conduit, enabling reusable extraction
Solution Approach 2:
Instead of breaking the conduit to remove it (traditional method), the invention inserts a tool inside the conduit and rotates it to extract the entire conduit intact. The extraction device works from the inside out, reversing the conventional approach of external force application, thereby preserving the conduit for reuse
2Adaptability or versatility
If pathway conduits are removed from concrete slabs, then holes are created for piping, but there is no easy way to include reinforcing materials or fill the conduits later
Solution Approach 1:
The extraction device serves multiple functions: it extracts conduits, creates clean holes in concrete slabs, and can be used with various conduit sizes through telescopic adjustment. The device's quadrangular main body with central orifice and adjustable telescopic tubes make it universally applicable to different construction scenarios, enhancing adaptability without proportionally increasing complexity
3Reliability
If conduit extraction damages the concrete slab, then conduits can be removed, but the structural integrity of the slab is compromised
Solution Approach 1:
The invention extracts the pathway conduit from the concrete slab by inserting the quadrangular main body into the conduit and rotating it, thereby taking out the conduit without applying damaging forces to the surrounding concrete. This extraction method preserves the concrete slab's structural integrity while efficiently removing the conduit
Solution Approach 2:
The quadrangular main body acts as an intermediary tool between the extraction force and the conduit. By placing this mediator inside the conduit and rotating it, the force is applied internally to the conduit rather than externally to the concrete slab, preventing damage to the slab while enabling efficient extraction
Data Source
AI summary
An extraction device to remove pathway conduits, which are embedded in hardened concrete slabs is arranged by a quadrangular main piece having lateral faces forming a curvature correlative to the diameter of the pathway conduit, and being cylindrical and freely rotatable inside the conduit. Towards the upper part of the quadrangular main piece, some sets of posts are deployed, showing a space between each set of posts, where the space between each set of posts, is occupied by a set of flat bars, placed in the center, held by a bolt, so that they can have movement, and turn to the sides, and have towards the upper end, a pointed spike. Towards the central part of the rectangular piece, there is an orifice through which a square coupling is placed, and which has a revision orifice and further down an inner thread as a fastener with a second square profile.