Ratchet Cable Spacer Clamp to Prevent Overhead Line Slippage
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Solution Overview
Problem
Cable spacers in overhead high-voltage power transmission systems tend to slip along conductive cables due to environmental factors and inadequate clamping force, leading to undesired movement and potential faults.
Innovation Solution
The cable spacer incorporates a keeper with a locking system and anti-slip material, which provides a compressive force to maintain the cable in place, using a ratchet mechanism and guide surfaces to prevent relaxation and enhance friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If installers tighten the clamps onto the conductive cables by hand, then the clamping force is increased to limit slippage, but the installer has limited leverage due to the high installation location, resulting in insufficient clamping force
Solution Approach 1:
A guide surface is introduced as an intermediary element between the keeper and the cable. The guide surface provides a structured path that directs and amplifies the installer's manual tightening force, converting limited hand leverage into effective clamping force on the cable without requiring the installer to physically reach or apply force at the high installation location
2Ease of manufacture
If the locking member is allowed to flex during installation, then the clamp can be easily installed onto the conductive cable, but the locking member returns to an unbiased shape after tightening, reducing the clamping force and worsening slippage
Solution Approach 1:
The guide surface performs a preliminary action by establishing the correct geometric relationship and alignment between the keeper and cable before the final clamping force is applied. This preliminary positioning ensures that when the locking member is tightened, the force is optimally directed onto the cable, maximizing clamping effectiveness while maintaining installation ease
Solution Approach 2:
The guide surface changes the geometric parameters of the clamping system by providing a specific surface profile that controls the angle and distribution of forces. This geometric parameter change allows the locking member to maintain effective clamping force throughout the installation and operation, preventing the force reduction that occurs with simple flexing and relaxation
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 solution effectively reduces slippage of the cable spacer along the conductive cables, maintaining the desired separation and preventing faults by applying a consistent and increased clamping force.
Implementation Method 1
A guide surface extends along a portion of the receiver to direct and support the keeper as the keeper is being adjusted from the first position to the second position
Implementation Method 2
An anti-slip material on the first arcuate surface interferes with axial movement of the region of the first cable within the first concave pocket
Data Source
AI summary
A cable spacer for maintaining positions of a plurality of cables relative to each other is provided. The cable spacer includes a frame, a hanger and a plurality of clamps that couple the plurality of cables to the frame to maintain the positions of the plurality of cables relative to each other. A first clamp includes a receiver with a first arcuate surface, and a keeper that is adjustably coupled to the receiver to be adjusted from a first position to a second position to interfere with removal of the region of the first cable from the first concave pocket. A locking system adjusts the keeper from the first position to the second position relative to the receiver, and maintains the keeper in the second position to exert a compressive force on the first cable, urging the first cable into the first concave pocket.