Milk Meter Valve Actuation via Pressure Differential
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Solution Overview
Problem
Existing milk meters lack efficient operational control and cleaning mechanisms, relying on pressure differences to manage valve positions, which can lead to inaccuracies in flow rate measurement and difficulties in maintenance.
Innovation Solution
Incorporating a valve in the liquid flow path that selectively takes up first or second valve positions based on predetermined pressure differences, allowing for easy operation during milking, cleaning, and rest modes, utilizing a piston-cylinder mechanism with a spring element and pressure selection means to manage fluid connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a valve is added to control liquid flow path for measurement and cleaning modes, then operational control and cleaning effectiveness are improved, but device complexity increases
Solution Approach 1:
The valve system automatically switches between measurement and cleaning modes based on pressure differential detection. The control mechanism uses the existing vacuum pressure during milking and atmospheric pressure during cleaning to autonomously actuate the valve, eliminating the need for manual control inputs or additional control systems.
Solution Approach 2:
The valve is actuated by pressure differential across a diaphragm or piston, using pneumatic principles to convert pressure differences into mechanical motion. This allows the valve to respond automatically to the presence or absence of vacuum pressure in the milking system without requiring electrical controls or complex mechanisms.
2Ease of operation
If pressure differential control is used to switch valve positions for different modes, then ease of operation is improved, but measurement precision may deteriorate due to pressure sensitivity
Solution Approach 1:
The liquid flow path is divided into separate measurement and cleaning pathways controlled by the valve. During measurement mode, the valve isolates the cleaning pathway and directs milk flow through the measurement pathway, ensuring that pressure changes in the cleaning system do not interfere with flow rate measurements.
Solution Approach 2:
The valve dynamically switches between measurement and cleaning modes based on real-time pressure conditions. The system adapts its configuration automatically, ensuring that measurement operations occur only when pressure conditions are appropriate (i.e., during active milking with vacuum pressure present), thereby maintaining measurement precision.
3Ease of operation
If the valve automatically switches positions based on pressure differences, then ease of operation is improved, but the system may become more sensitive to pressure variations affecting reliability
Solution Approach 1:
The control mechanism continuously monitors the pressure differential across the valve and automatically adjusts valve position in response. When vacuum pressure is detected during milking, the valve switches to measurement mode; when atmospheric pressure is detected during cleaning, the valve switches to cleaning mode. This feedback mechanism ensures reliable automatic operation while being insensitive to normal pressure variations within each mode.
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
Enables precise measurement of milk flow rates during milking, facilitates effective cleaning, and ensures the milk meter is ready for use or rest modes by controlling valve positions through pressure adjustments, enhancing operational reliability and ease of maintenance.
Implementation Method 1
a pressure at the operating opening which is greater than a pressure which prevails in the space within the housing outside the cylinder presses the cylinder and the piston relative to each other in the direction of the first position
Implementation Method 2
the valve is furthermore provided with a spring element which presses the cylinder and the piston relative to each other in the direction of the second position
Data Source
AI summary
A milk meter for measuring a flow rate of milk, having an inlet, an outlet, and a liquid flow path from the inlet to the outlet, the milk meter has a stabilization chamber in the liquid flow path and a float in the stabilization chamber configured to float on the milk, wherein the milk meter is configured so the level of milk in the stabilization chamber depends on the flow rate of the milk flow, the milk meter also has a magnetic unit for generating a magnetic field in the stabilization chamber, which varies in a height direction of the stabilization chamber, the float contains an electronic measuring unit for measuring the strength of the magnetic field, which is a measure of the height within the stabilization chamber of the float and the strength of the magnetic field measures the flow rate of the milk.