Modular Valve Nut Removal Tool for Underground Water Systems
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Solution Overview
Problem
Existing tools for removing and replacing underground water distribution valve nuts are not universally applicable, lack size adjustment capability, and are often costly and cumbersome, requiring excavation and not designed for sanitary sewer or fire hydrant applications.
Innovation Solution
A configurable valve nut removal and replacement system with modular components, including a valve nut puller tool, accessory tool shaft, T-handle, nut socket tool, and replacement valve nuts, allowing remote operation from above ground to extract and replace damaged valve nuts without excavation, using a threaded actuator shaft and cam mechanism for size and shape adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional wrench systems and nut removal tools are used, then valve nuts can be removed, but the tools are not universally applicable to different valve types and environments (sanitary sewer, fire hydrant, water main)
Solution Approach 1:
The tool system is designed with interchangeable components including multiple jaw configurations, different shaft lengths, and various attachment options that allow a single base tool to serve multiple valve types and applications (sanitary sewer, fire hydrant, water main) without requiring separate specialized tools for each application
Solution Approach 2:
The tool is divided into modular segments including a handle assembly, interchangeable shafts, adjustable jaw mechanisms, and replaceable attachment components. This segmentation allows users to configure the tool for specific applications by selecting appropriate components, enhancing versatility while keeping individual components relatively simple
2Adaptability or versatility
If fixed-size wrenches and nut pullers are used, then specific valve nuts can be removed, but tools lack size adjustment capability for different nut dimensions
Solution Approach 1:
The tool incorporates adjustable jaw mechanisms with movable components that can be repositioned along the shaft to accommodate different nut sizes. The jaws can be adjusted independently or as a pair, and the mechanism includes quick-adjust features that reduce the complexity of sizing the tool for different applications
3Ease of repair
If excavation is performed to access underground valve nuts, then damaged valve nuts can be replaced, but the process becomes costly and time-consuming
Solution Approach 1:
The tool system acts as an intermediary that transmits mechanical force and torque from above-ground operating position down to the underground valve nut through the existing valve stem structure. This eliminates the need for direct physical access to the valve body, allowing nut removal and replacement without excavation while still providing full repair capability
4Force
If motorized torque converters are used for valve nut removal, then powerful extraction force is achieved, but the equipment becomes more costly and cumbersome
Solution Approach 1:
The tool replaces complex motorized torque converter systems with a purely mechanical advantage system using levers, cams, and force multiplication mechanisms built into the handle and jaw assembly. This provides sufficient extraction force through mechanical design rather than powered systems, reducing cost and operational complexity
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 efficient, cost-effective, and universal removal and replacement of valve nuts in various environments, reducing the need for excavation and improving operational efficiency by allowing remote, above-ground maintenance of water distribution systems.
Implementation Method 1
using a threaded actuator shaft and cam mechanism for size and shape adaptation
Implementation Method 2
using a threaded actuator shaft and cam mechanism for size and shape adaptation
Data Source
AI summary
A valve nut removal and replacement system including a plurality of associated tools and methods used for above ground access to, replacement of, and maintenance of worn, misshaped, abused or otherwise faulty valve nuts located at a subsurface location. A system is provided including tool components, many of which can be configured for multiple uses. The system provides for the cleaning and removal of a retainer nut, for the removal of a damaged valve nut, and for the installation and securing of a new valve nut from a remote above ground location.