Robotic Milking Valve Assembly for Contamination Prevention
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Solution Overview
Problem
Dairy milking systems face contamination risks due to differential pressures causing seepage and leakage of sanitizing fluids and cleaning agents into the milk collection system, despite the use of four-way valves and block-bleed-block systems, which are not always practical or effective in robotic milking systems.
Innovation Solution
A robotic milking system with a teat wash conduit and valve assembly that includes a block-bleed-block configuration, where a vent at atmospheric pressure separates sanitizer and milk lines, preventing vacuum-induced contamination by maintaining sanitizer fluids out of the milking system during the milking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a four-way valve is used to separate wash lines and milk lines, then the system structure is simplified, but differential pressure causes seepage and leakage of cleaning fluids into the milk collection system
Solution Approach 1:
The patent divides the single four-way valve into two separate two-way valves, with each valve controlling a specific line (wash line or milk line). This segmentation prevents differential pressure from causing cross-contamination while maintaining system simplicity. Each valve independently controls its respective line, eliminating the pressure differential issue that plagues the four-way valve design.
Solution Approach 2:
The patent introduces a block-bleed-block valve configuration as an intermediary mechanism between the wash line and milk line. This intermediary system includes a block valve that isolates the lines, a bleed valve that equalizes pressure, and another block valve that re-isolates the lines. This intermediary structure prevents cleaning fluids from leaking into the milk collection system while maintaining operational simplicity.
2Reliability
If a block-bleed-block system is implemented, then contamination prevention is improved, but the system complexity and space requirements increase
Solution Approach 1:
The patent merges the block-bleed-block valve configuration with the existing robotic milking system architecture, integrating the contamination prevention mechanism into the standard milking cycle control. By combining the valve assembly with the robotic control system, the patent reduces overall system complexity while maintaining the block-bleed-block protection against contamination.
Solution Approach 2:
The patent designs the valve assembly to serve multiple functions: it provides contamination prevention through block-bleed-block configuration, controls the timing of wash and milk line isolation, and integrates with robotic milking cycle control. This multi-functionality reduces the need for separate components, thereby reducing overall system complexity while maintaining reliability.
3Productivity
If automated teat cleaning systems are used, then labor is reduced and cleaning efficiency is improved, but vacuum may draw sanitizer and water into the milking system
Solution Approach 1:
The patent extracts the sanitizer and water delivery system from direct connection to the milk collection system. By using separate block-bleed-block valve assemblies for the wash line and milk line, the patent isolates the cleaning agents before they can be drawn into the milk system by vacuum. This extraction prevents contamination while maintaining automated cleaning efficiency.
Solution Approach 2:
The patent introduces a block-bleed-block valve assembly as an intermediary barrier between the automated teat cleaning system and the milk collection system. This intermediary structure includes isolation valves that prevent vacuum-induced backflow of sanitizer and water into the milk lines, while still allowing the automated cleaning process to function efficiently.
4Loss of time
If combined preparation and milking systems are used, then time is saved and teats are not exposed to dirt, but vacuum may draw cleaning fluids into the milking system
Solution Approach 1:
The patent performs preliminary isolation of the milk line from the cleaning fluid system before the combined preparation and milking operation begins. By pre-positioning the block-bleed-block valve assembly in an isolated state, the system prepares to prevent vacuum-induced contamination while still allowing the time-saving combined operation to proceed.
Solution Approach 2:
The patent introduces a block-bleed-block valve assembly as an intermediary protective barrier that is activated during the combined preparation and milking process. This intermediary structure prevents vacuum from drawing cleaning fluids into the milk collection system while maintaining the time efficiency of the combined operation.
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 effectively prevents contamination of milk lines by ensuring sanitizer fluids do not enter the milking system, maintaining sanitary conditions and reducing operator involvement, while being practical for robotic milking systems.
Implementation Method 1
differential pressure and vacuum applied on opposite sides of a four-way valve are likely to cause seepage and leaking of milk and/or cleaning fluids past seals in the four-way valve
Implementation Method 2
vacuum in the milk lines (used to draw milk to a central storage location) results in the milk line having a different pressure than the wash lines
Data Source
AI summary
Apparatus and methods for a dairy harvesting facility including valves and valve assemblies that prevent contaminants from reaching a central milk collection system.