Underground Cable Anchor Locking to Minimize Power Line Theft
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing anti-theft systems for underground power line wiring are ineffective in preventing theft and minimizing cable removal, as they can be easily disabled by thieves, leading to significant economic and environmental losses.
Innovation Solution
An anti-theft system using an expansion anchor with a first tubular element and a second internal element that radially expands to secure the power line wiring, making it impossible to remove the cable in the opposite direction, with the system anchored in concrete inspection chambers and assembled using mechanical elements to prevent disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device retaining the cable inside an inspection chamber is used, then the cable is secured in place, but thieves can disable the system by accessing two adjoining inspection chambers and pulling the cable, allowing significant amounts of cable to be stolen
Solution Approach 1:
The system divides the cable protection into multiple independent expansion anchors installed at different inspection chambers along the cable route. Each anchor independently secures the cable at its location, creating segmented protection points that prevent continuous cable removal even if one anchor is compromised.
Solution Approach 2:
The expansion anchors are pre-installed in the inspection chambers before any theft attempt occurs. When a thief tries to remove cable, the anchors have already expanded and locked onto the cable, creating immediate resistance without requiring activation during the theft attempt.
2Ease of operation
If conventional retaining devices are used, then cable removal is made difficult, but the devices can be easily disabled by thieves with minimal effort
Solution Approach 1:
The expansion anchor transitions from a compact installable state to an expanded locked state dynamically. During installation, the anchor is compressed and inserted into the inspection chamber. Once installed, it expands radially to lock onto the cable and chamber walls, creating a dynamic transformation that provides strong security without complicating the installation process.
Solution Approach 2:
The system changes the physical parameters of the expansion anchor from a small, insertable dimension to a large, expanded dimension that provides strong mechanical interlocking. This parameter change occurs after installation, providing strong theft deterrence while maintaining ease of initial installation.
3Loss of substance
If the expansion anchor is installed to prevent cable removal, then cable theft is minimized, but the system requires complex assembly and disassembly prevention mechanisms
Solution Approach 1:
The system merges the cable securing function and the anchor installation function into a single integrated expansion anchor device. The anchor simultaneously secures the cable and anchors itself to the inspection chamber structure through radial expansion, eliminating the need for separate mounting brackets, screws, or complex assembly mechanisms.
Solution Approach 2:
The expansion anchor is self-securing through its expansion mechanism. Once inserted into the inspection chamber, the anchor automatically expands and locks onto the chamber walls and cable without requiring additional fastening operations, tools, or complex assembly steps by the installer.
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 effectively deters theft by minimizing the amount of cable that can be removed to a few centimeters, reducing repair costs, environmental impact, and deterring theft, while being reliable and easy to integrate into existing installations.
Implementation Method 1
a second internal element which radially expands to secure the power line wiring
Implementation Method 2
a first tubular element the external surface of which has, close to one of its ends, teeth which engage with and are retained in the annular channels defined in the corrugated tubes
Implementation Method 3
a deformable, resilient engaging member that is operatively compressed by a compressing mechanism to radially extend its outer surface toward the conduit's inner surface
Implementation Method 4
compression of the engaging member tightly compresses the wires against the conduit to increase drag and prevent pulling the wires out of the conduit
Data Source
Figure 1~2
Figure 3~4
AI summary
The present invention relates to a system for minimizing the theft of cables (1) corresponding to underground power lines that run through corrugated tubes (5), the ends of which lead into inspection chambers (2) protected by a concrete envelope (3). The system includes a pair of concentric tubular elements (6) and (10), the first having teeth (7) that engage with the annular channels of the corrugated tube (5) at the end that leads into the inspection chamber (2), while the internal tubular element (10) presses radially towards the outside of the first tubular element, causing same to expand to allow more effective engagement, this internal element having wedging means (13) that allow the cables (1) to be inserted in one direction but prevent the removal thereof, by wedging, such that in the event of the cable being pulled under a significant force, the cable breaks by means of shearing before it can be removed.