Stringing Messenger Clamp With 20-Degree Angular Accommodation
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Solution Overview
Problem
Conventional messenger clamps for overhead transmission and distribution systems are inflexible, requiring multiple devices for installation and retention, leading to high costs and inefficiencies due to their limited ability to accommodate variations in cable path direction and elevation, necessitating frequent device changes and increasing installation time and expense.
Innovation Solution
A stringing messenger clamp with a bracket and assembly body featuring a cable channel and movable assembly clamp that can be closed to retain the messenger cable, allowing for both installation and permanent retention, capable of accommodating variations up to 20° in the x, y, and z directions, eliminating the need for multiple devices and simplifying the installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional clamps with limited angular variation capability are used, then the clamp structure can be simple, but multiple different clamp types are required for different cable path configurations, increasing device complexity and installation time
Solution Approach 1:
The clamp assembly is designed to perform multiple functions: it can accommodate cable paths with angular variations up to 20° in multiple directions, serving both straight runs and curved paths with a single device type, eliminating the need for multiple specialized clamp variants
Solution Approach 2:
The clamp incorporates a movable assembly clamp that can be positioned at different locations along the cable channel, allowing dynamic adjustment to accommodate varying angular deviations and cable path configurations during both installation and permanent retention phases
2Reliability
If multiple installation devices and permanent retention devices are used, then each device can be optimized for its specific function, but the installation process becomes tedious and expensive requiring frequent device changes
Solution Approach 1:
The clamp assembly merges the installation device function and permanent retention device function into a single integrated unit. The assembly clamp serves as both the installation mechanism and the permanent retention mechanism, eliminating the need to exchange between different device types during the installation process
Solution Approach 2:
The assembly clamp is pre-configured in an open position that allows easy cable insertion during installation, then can be closed to provide permanent retention. This preliminary configuration eliminates the need for subsequent device changes or additional retention steps
3Adaptability or versatility
If conventional clamps are used for straight runs only, then the clamp design can be simplified, but they cannot accommodate cable paths with curves greater than 6° variation, requiring replacement with different clamp types
Solution Approach 1:
The clamp assembly allows for parameter changes in the cable channel orientation and assembly clamp position to accommodate angular variations up to 20° in x, y, and z directions, enabling the same clamp design to handle both straight runs and curved cable paths without requiring design modifications
Data Source
AI summary
A stringing messenger clamp for use in overhead transmission and distribution systems and method of installing a messenger cable is provided. The stringing messenger clamp includes a bracket and an assembly body supported by the bracket, wherein the assembly body has a cable channel sized to receive a portion of a messenger cable. An assembly clamp is movable with respect to the assembly body and closable upon the cable channel. When the assembly clamp is in a closed position, it retains in place the portion of the messenger cable within the cable channel.