Draining Structural Cable Anchoring Systems
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Solution Overview
Problem
Current anchoring systems for structural cables lack a method to efficiently drain filling materials from chambers that are difficult to access, such as those located behind the anchoring block in construction work, which can complicate maintenance and replacement.
Innovation Solution
A method involving the insertion of a heating element into the filling material to fluidize it, allowing for its removal through an opening in the chamber envelope, using pre-existing or created openings, with temperature control to prevent damage to the cable sheaths and ensure safe extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filling material is used to seal and protect the cable in the chamber, then the reliability of the anchoring system is improved, but the ease of maintenance deteriorates because the material cannot be removed from difficult-to-access chambers
Solution Approach 1:
The patent changes the temperature parameter of the filling material to enable removal. By heating the chamber, the filling material transitions from a solid sealed state to a fluid state, allowing it to be drained through the injection hole. This parameter change resolves the contradiction by maintaining sealing performance during normal operation while enabling maintenance through temperature-induced state change.
Solution Approach 2:
The patent implements periodic heating cycles to facilitate maintenance. The filling material is heated periodically to a temperature where it becomes fluid and can be drained, then cooled and re-injected to restore the seal. This periodic action allows the system to alternate between reliable sealed operation and maintainable fluid state.
2Manufacturing precision
If the filling material is injected hot to provide proper sealing, then the manufacturing precision of the seal is improved, but the loss of energy increases due to heating and cooling cycles
Solution Approach 1:
The patent makes the heating element multi-functional by using it both for the initial injection process and for subsequent maintenance operations. The same heating element that provides proper sealing during manufacturing is reused periodically to fluidize the material for drainage, eliminating the need for separate heating equipment and reducing overall energy consumption.
Solution Approach 2:
The system uses its own heating element to service itself during maintenance. The heating element, already part of the anchoring system, is utilized to heat and drain the filling material when maintenance is needed, rather than requiring external heating equipment. This self-service approach reduces energy loss by using existing system components.
3Reliability
If the filling material occupies the entire chamber to envelop the cable, then the protection of the cable is improved, but the difficulty of accessing the material for removal increases
Solution Approach 1:
The patent extracts the filling material from the chamber through the injection hole by heating it to a fluid state. The material is drained out through the same hole used for injection, allowing complete removal of the filling material from the chamber without requiring access to the cable ends or other locations. This extraction principle resolves the contradiction by enabling full material removal through a single accessible point.
Solution Approach 2:
The heating element acts as an intermediary that enables material removal. By introducing heat through the heating element, the filling material changes state from solid to fluid, allowing it to flow out through the injection hole. This intermediary heating process makes the inaccessible material accessible for removal.
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
Enables non-intrusive and functional emptying of the filling material without altering the anchoring system, allowing for easy maintenance and potential refilling, while ensuring the structural integrity and safety of the cable sheaths.
Implementation Method 1
heating the first filling material using the heating element to fluidize all or part of the first filling material
Implementation Method 2
heating the first filling material using the heating element to fluidize all or part of the first filling material
Data Source
Figure 1a~1b
Figure 2~3
AI summary
Method for emptying an anchoring system (1) of a structural cable (2a, 2b, 2c) to a building element (7), the anchoring system comprising a first chamber (3) delimited by a sheath (4, 5, 6), the first chamber containing a first part (2aa, 2bb, 2cc) of the structural cable and a first filler material, the method comprising the following steps: insertion of at least one heating element (10a, 10b) into the first filler material through an opening (4a, 4b) in the sheath of the first chamber; heating of the first filler material with the heating element to liquefy all or part of the first filler material; and extraction of the first liquefied filler material through an opening (4a, 4b) in the sheath of the first chamber.