Liquid Storage Float Valve Linkage to Prevent Port Sticking
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Solution Overview
Problem
Existing liquid supply devices face issues with float valves sticking to communication ports due to negative pressure, leading to potential blockages and inefficiencies in liquid flow.
Innovation Solution
A liquid storage unit design featuring a float valve coupled to a cover part via a flexible coupling part that moves vertically, allowing the float valve to open and close an outflow port based on liquid levels, independent of buoyancy, and includes a detection and control system to manage pump operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a float valve is used to close the outflow port based on liquid level, then liquid overflow is prevented, but the float valve may stick to the communication port due to negative pressure
Solution Approach 1:
The patent introduces a flexible coupling part that enables dynamic movement of the float valve between a first position (closing the communication port) and a second position (opening the communication port). This dynamic positioning mechanism allows the float valve to respond to negative pressure by moving to the second position, preventing sticking, while still achieving reliable closing when needed
Solution Approach 2:
The flexible coupling part acts as an intermediary between the float and the float valve. It transmits the floating motion while allowing independent positioning of the float valve, enabling the valve to be pulled away from the communication port and preventing direct contact that would cause sticking under negative pressure
2Quantity of substance
If the float valve closes the communication port when liquid level is low, then overflow is prevented, but liquid flow may be blocked due to sticking
Solution Approach 1:
The flexible coupling part enables the float valve to dynamically switch between closing and opening positions. When liquid level is low, the float moves down but the coupling allows the valve to be pulled open, maintaining flow efficiency. When liquid level is high, the float moves up to close the port, preventing overflow
Solution Approach 2:
The flexible coupling part mediates between the float's position (indicating liquid level) and the float valve's position (controlling flow). This intermediary mechanism decouples the direct connection, allowing the valve to open even when the float is in a closing position, thus maintaining productivity while controlling liquid quantity
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 reduces the risk of float valve sticking and enhances liquid flow management by ensuring the outflow port opens and closes reliably, even with varying liquid levels and pressures, improving operational efficiency.
Implementation Method 1
a float valve changing in position according to a remaining amount of the liquid in the liquid storage unit
Data Source
AI summary
A liquid storage unit configured to store a liquid includes: an injection port through which to inject the liquid; a cover part configured to open and close the injection port; an outflow port through which to allow the liquid in the liquid storage unit to flow out; a float valve changing in position according to a remaining amount of the liquid in the liquid storage unit, the float valve being configured to close the outflow port when the remaining amount of the liquid is in an end state; and a coupling part having a length in a vertical direction and configured to couple the cover part and the float valve, wherein the float valve moves from a closing position for closing the outflow port to an opening position for opening the outflow port, as the cover part moves from a closed position to an open position.