U-Shaped Lifting Anchor for Integrated Formwork Walls
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Solution Overview
Problem
Existing lifting anchors for walls with integrated formwork are bulky, require significant coating, and have limitations in payload capacity and watertightness, leading to positioning constraints and potential degradation of the wall structure during lifting operations.
Innovation Solution
A compact lifting anchor with an elongated metallic element folded in a U shape, featuring a transverse compression element with a reduced section area that can withstand shear forces, eliminating the need for extensive coating and enhancing payload capacity while maintaining watertightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional lifting hooks with long curved U-shaped rods are used, then lifting capacity is achieved, but the device becomes bulky and requires significant embedding length
Solution Approach 1:
The lifting anchor is divided into distinct functional segments: a compression element for bearing loads, a metal element for connection, and a coating element for sealing. This segmentation allows each component to be optimized independently, resulting in a more compact overall structure that maintains lifting capacity while reducing bulkiness.
Solution Approach 2:
The invention transitions from a traditional three-dimensional curved U-shaped rod design to a more planar arrangement where the compression element and metal element are positioned in specific dimensional relationships. This dimensional reorganization reduces the embedding length and overall volume required for the lifting anchor.
2Stability of the object's composition
If lifting hooks with large diameter axles are used to prevent buckling, then lifting stability is improved, but plate dissociation occurs at anchoring and watertightness is compromised
Solution Approach 1:
The compression element is designed with specific local properties: a reduced section area that provides sufficient strength for lifting stability while being small enough to maintain effective coating coverage for watertightness. The coating element is specifically positioned at the anchoring regions to ensure waterproofing without requiring large axle diameters.
Solution Approach 2:
The lifting anchor combines different materials with complementary properties: a compression element made of material with high strength-to-weight ratio for stability, and a coating element providing waterproofing. This composite approach allows the anchor to achieve both lifting stability and watertightness without relying on large diameters that cause plate dissociation.
3Reliability
If extensive coating is applied to lifting anchors, then watertightness is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of requiring extensive coating coverage, the invention applies coating only to the necessary regions where water protection is needed, such as the anchoring portions of the compression element and the metal element. This partial coating approach maintains adequate watertightness while significantly reducing coating requirements and manufacturing complexity.
4Volume of moving object
If lifting anchors with reduced section area are used, then device compactness is improved, but load-bearing capacity may be compromised
Solution Approach 1:
The compression element is designed with a reduced section area that provides sufficient load-bearing capacity through optimized geometric parameters and material selection. The specific cross-sectional dimensions are calculated to achieve the required strength while minimizing the overall volume of the lifting anchor, thus maintaining compactness without compromising load-bearing capacity.
Data Source
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AI summary
Lifting anchor for integrated formwork wall and integrated formwork wall comprising said lifting anchor. The present invention relates to a lifting anchor (1) for an integrated formwork wall (2), said integrated formwork wall (2) comprising a first wall (3), a second wall (4), and a connecting element for linking them and keeping them apart from each other, to form between them a filling space (5) of thickness (E), said lifting anchor (1) comprising: - an elongated metal element (6) folded into a U-shape which includes a folded base (7), a first arm (8) and a second arm (9), - a transverse compression element (10) disposed perpendicular to said first and second arms (8, 9), said compression element (10) comprising a first extremity portion (12) and a second extremity portion (13) respectively projecting from the first arm (8) and the second arm (9),said lifting anchor (1) is characterized in that: - said compression element (10) has a cross-section with dimensions between 1600 square millimeters and 23000 square millimeters, - the first extremity portion (12) and the second extremity portion (13) are respectively projecting from the first branch (8) and the second branch (9) by a distance between 15 millimeters and 25 millimeters.