Multi-Function Valve Pump Control for Contamination-Free Air Lines
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Solution Overview
Problem
Existing well pumps used in landfills for leachate removal are prone to contamination and reliability issues due to the dual use of air supply and exhaust lines, leading to premature failures in harsh environments.
Innovation Solution
A multi-function valve and controller system that separates the compressed air supply and exhaust functions using a spool valve with a check valve and pilot air control, preventing contamination and ensuring reliable operation by maintaining instrument air quality and reducing external connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If dual use of air supply and exhaust lines is implemented, then device complexity is reduced, but reliability deteriorates due to contamination
Solution Approach 1:
The air supply line and exhaust line are segmented into separate, dedicated pathways. The air supply line provides clean compressed air to the pump, while the exhaust line separately handles contaminated pump exhaust, preventing cross-contamination and improving reliability without significantly increasing overall system complexity.
Solution Approach 2:
A dedicated exhaust valve serves as an intermediary component that specifically handles contaminated exhaust air, separating it from the clean air supply pathway. This intermediary element prevents contamination from propagating through the system while maintaining manageable device complexity.
2Ease of manufacture
If commercial off the shelf air valves are used, then ease of manufacture is improved, but reliability worsens due to contamination in harsh environments
Solution Approach 1:
The exhaust valve is designed as a replaceable component that can be easily swapped out when contaminated or worn. This approach prioritizes reliability by allowing frequent replacement of the valve exposed to harsh conditions, while keeping the overall system manufacturable using standard components.
Solution Approach 2:
Different valve locations are assigned different quality requirements based on their exposure to contamination. The air supply valve requires high reliability and contamination resistance, while the exhaust valve is positioned to handle contaminated air and is designed for easier replacement, optimizing both manufacture and reliability.
3Device complexity
If pump exhaust is returned through the same valve and supply line, then device complexity is reduced, but harmful factors increase due to contamination of operating hardware
Solution Approach 1:
The air transport system is segmented into separate supply and exhaust pathways. Clean compressed air travels through dedicated supply lines to the pump, while contaminated exhaust air is routed through separate exhaust lines to a dedicated exhaust valve, preventing contamination of the operating hardware while maintaining simple overall configuration.
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 enhances the reliability and operational efficiency of air-operated well pumps by preventing contamination and allowing for easy installation and removal, ensuring consistent leachate removal and methane extraction while maintaining the integrity of landfill linings.
Implementation Method 1
a check valve positioned in the cavity and operably connected to the discharge tube by a coupling
Implementation Method 2
a multi-float control assembly positioned in the cavity, the multi float control assembly including a bottom float check valve and an upper float check valve
Implementation Method 3
A multi-function valve and controller system that separates the compressed air supply and exhaust functions using a spool valve with a check valve and pilot air control
Data Source
AI summary
A pump assembly is disclosed. The pump assembly including a pump having an outer casing having a first end, an opposing second end, and a cavity therein and a multi-function valve connected to the first end of the pump. The pump further including a discharge tube positioned in the cavity and exiting the first end of the outer casing; a check valve positioned in the cavity and operably connected to the discharge tube by a coupling; and a multi-float control assembly positioned in the cavity, the multi float control assembly including a bottom float check valve operably connected to the discharge tube by the coupling and an upper float check valve connected to a vent exiting the first end of the outer casing.