Liquid Measuring Piston with Pressure Relief Port
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Solution Overview
Problem
Existing self-measuring containers for liquids face challenges in determining the initial position of the liquid due to factors like operation force, speed, liquid volume, and air pressure, affecting measurement accuracy and convenience, leading to liquid waste, pollution, oxidation, and volatilization.
Innovation Solution
An initial positioning system with a measuring channel, variable-pressure chamber, and piston that generates alternating pressures, allowing liquid to flow in and out while maintaining a visible liquid-air interface, ensuring accurate and convenient measurement and taking without external tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional measuring tools are used to measure and take liquids, then measurement can be performed, but liquid waste, pollution, oxidation, and volatilization occur due to contact with external tools
Solution Approach 1:
The patent combines the storage container and measuring tool into a single integrated device. The container includes an internal measuring channel and variable-pressure chamber system that allows measurement and liquid removal to be performed using only the container itself, eliminating the need for external measuring tools and preventing liquid contact with external devices.
Solution Approach 2:
The container performs self-measurement and self-liquid-removal functions through its internal piston and variable-pressure chamber mechanism. The system uses pressure differential created by piston movement to automatically draw liquid into the measuring channel and then expel it, making the container self-sufficient without requiring external measuring instruments.
2Measurement precision
If existing self-measuring containers are used, then external tools are avoided, but initial liquid positioning is difficult to determine due to operation force, speed, and volume variations
Solution Approach 1:
The patent incorporates a pressure relief port that provides visual feedback through a liquid-air interface. When the piston reaches the pressure relief port during retraction, liquid is discharged and the interface position indicates the initial measurement point. This visual feedback mechanism allows users to accurately determine the initial position regardless of variations in operation force or speed.
Solution Approach 2:
The system pre-positions liquid in the measuring channel by using the piston's retraction to create negative pressure that draws liquid to a predetermined initial position before measurement begins. This preliminary positioning action ensures that the liquid starts at the correct measurement point without requiring precise manual control during operation.
3Productivity
If the variable-pressure chamber is filled with too much air, then operation is easier, but measurement sensitivity and response time are delayed
Solution Approach 1:
The patent specifies an optimal liquid volume parameter (not less than one-third of the variable-pressure chamber volume) to balance measurement sensitivity with operational ease. This parameter optimization ensures sufficient liquid contact with the piston for rapid response while maintaining enough air space for smooth piston movement and pressure differential creation.
4Measurement precision
If the liquid volume in the variable-pressure chamber is increased, then measurement accuracy improves, but the chamber volume required increases
Solution Approach 1:
The patent establishes a minimum liquid volume parameter (one-third of chamber volume) that optimizes measurement accuracy without requiring excessive chamber size. This ratio-based parameter ensures sufficient liquid for accurate measurement while constraining the overall chamber volume to practical dimensions.
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 enables sensitive, accurate, and convenient liquid measurement and taking, preventing waste, pollution, oxidation, and volatilization, with improved sensitivity and operational simplicity.
Implementation Method 1
The piston reciprocates in the variable-pressure chamber to generate a positive pressure alternating with a negative pressure in the variable-pressure chamber
Implementation Method 2
When the piston moves outward to generate a negative pressure in the variable-pressure chamber, air outside the variable-pressure chamber enters into the variable-pressure chamber from the pressure relief port
Data Source
AI summary
An initial positioning system and method for liquid measuring and taking. The system comprises a measuring passage, a variable pressure chamber, and a piston, an initial end of the measuring passage being in communication with the upper part of the variable pressure chamber; the piston reciprocates in the variable pressure chamber to cause a change between positive pressure and negative pressure in the variable pressure chamber; the initial positioning system further comprises a pressure relief port located on the wall of the variable pressure chamber and capable of communicating with the outside of the variable pressure chamber; when the piston is located at the pressure relief port, and the inside and outside of the variable pressure chamber are in communication, the maximum volume of the liquid that can be accommodated in the variable pressure chamber is not smaller than one third of the total volume of the variable pressure chamber.