Integrated Valve Cartridge Extractor for Tool-Free Servicing
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Solution Overview
Problem
Existing backflow prevention valves require difficult manual removal of internal components like check valve cartridges during servicing, inspection, or testing, necessitating a solution for easy extraction without additional tools.
Innovation Solution
A valve cartridge extraction tool with pins on its upper surface is integrated into the valve assembly, allowing for easy coupling and decoupling of the cartridge, providing additional torque and leverage for removal, and eliminating the need for separate tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual removal of cartridge is used, then no additional tools are needed, but removal is difficult and requires excessive effort
Solution Approach 1:
An extraction tool with pins is introduced as an intermediary mechanism between the operator and the cartridge. The pins engage with notches on the cartridge to provide leverage and mechanical advantage, making removal easy without requiring excessive manual effort or force
Solution Approach 2:
The extraction tool is segmented into multiple pins distributed around its circumference, each capable of engaging with corresponding notches on the cartridge. This segmentation allows for distributed force application and smooth rotational extraction
2Ease of operation
If an extraction tool with pins is integrated into the valve assembly, then cartridge removal becomes easy, but device complexity increases
Solution Approach 1:
The extraction tool serves multiple functions: it acts as both an extraction mechanism and a functional component of the valve assembly. The tool can be positioned in different locations (e.g., at the bonnet or body) and serves both operational and structural roles, reducing the need for separate dedicated extraction tools
Solution Approach 2:
The extraction tool is merged with existing valve assembly components rather than being a separate add-on. It is integrated into the bonnet or body structure, combining the extraction function with the valve's existing mechanical structure to minimize overall complexity
Data Source
AI summary
An apparatus and method for valve cartridge extraction from a valve assembly, wherein the assembly includes a valve member body, a cartridge, and a valve cartridge extraction (VCE) tool comprising at least one pin disposed on the upper surface of the VCE tool. During cartridge removal, the VCE tool is uncoupled from the valve member body and is coupled to the cartridge with the at least one pin. The cartridge is rotated with the coupled VCE tool to assist in cartridge removal. The valve assembly may also include a hood covering the VCE tool.