Landfill Well Pump Float Valve Control Without a Control Rod
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Solution Overview
Problem
Landfill well pumps face challenges in operating effectively in corrosive and high-temperature environments, requiring high reliability and efficient liquid removal while managing slurry and leachate chemicals, with existing designs often being costly and energy-intensive.
Innovation Solution
A submersible fluid pump design featuring a pneumatic valve system with a float and magnetic dampening mechanism, eliminating the need for a control rod, and using a foam float with tubular geometry and radial holes for enhanced movement regulation and debris removal, allowing for efficient liquid management in landfill conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a control rod is used in the pump system, then the pump can effectively control fluid flow, but the device complexity and cost increase
Solution Approach 1:
The patent removes the control rod from the pump system entirely, replacing it with a float mechanism that directly actuates the pneumatic valve. This extraction of the control rod simplifies the device structure while maintaining fluid flow control capability through the float's buoyancy-based operation.
Solution Approach 2:
The patent replaces the mechanical control rod system with a pneumatic system. The float actuates a pneumatic valve that introduces pressurized air to control fluid flow, substituting direct mechanical linkage with pneumatic actuation to reduce complexity.
2Productivity
If traditional pump designs are used in landfill environments, then the pumps can remove liquids, but the reliability decreases due to corrosion and high temperatures
Solution Approach 1:
The patent employs a simple, robust float mechanism made from materials resistant to corrosion and high temperatures. The float and pneumatic valve components are designed to withstand harsh landfill conditions without requiring complex protective systems, prioritizing reliability through material selection and simplified design.
Solution Approach 2:
The patent changes the operating parameters by using pneumatic pressure instead of direct mechanical force to control fluid flow. This allows the pump to operate effectively in high-temperature and corrosive environments where traditional mechanical components might fail, as the pneumatic system and float are less susceptible to these environmental factors.
3Productivity
If energy-intensive pump systems are used, then high productivity is achieved, but energy consumption increases
Solution Approach 1:
The patent uses a periodic float mechanism that rises and falls with fluid level changes to periodically actuate the pneumatic valve. This periodic operation allows the pump to remove liquids efficiently while consuming energy only when needed, rather than continuous operation, thereby reducing overall energy consumption while maintaining productivity.
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 design ensures reliable and cost-effective operation by regulating fluid movement and preventing debris accumulation, maintaining pump efficiency and longevity in harsh landfill environments.
Implementation Method 1
a float positioned around the discharge tube and within the outer case such that the float is within the discharge tube and the outer case, the float being movable along the discharge tube in an axial direction
Implementation Method 2
a plurality of magnets comprising a first magnet fixed with respect to the actuator and a second magnet fixed with respect to the float, the second magnet configured to magnetically repel the first magnet as the float moves to tip the actuator to either open or close the pneumatic valve
Implementation Method 3
a pneumatic valve configured to introduce pressurized air into the interior of the fluid pump
Data Source
AI summary
A submersible fluid pump suitable for use in a landfill well includes an outer case extending along a vertical axis and at least partially defining an interior of the fluid pump, a fluid inlet and outlet, a discharge tube within the outer case and disposed between the fluid inlet and the fluid outlet, a float positioned around the discharge tube and within the outer case such that the float is within the discharge tube and the outer case, the float being movable along the discharge tube in an axial direction, a pneumatic valve configured to introduce pressurized air into the interior of the fluid pump, an actuator configured to open and close the pneumatic valve, and a plurality of magnets comprising a first magnet fixed with respect to the actuator and a second magnet fixed with respect to the float, the second magnet configured to magnetically repel the first magnet as the float moves to tip the actuator to either open or close the pneumatic valve.