Short Milk Tube Vent Plug Assembly for Stable Vacuum and Milk Flow
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Solution Overview
Problem
Existing milker units face challenges in maintaining proper vacuum in short milk tubes while minimizing interference with milk flow, leading to issues like foaming, energy wastage, and premature vent plug clogging, which affect dairy animal comfort and operational efficiency.
Innovation Solution
A vent plug design with a barbed end and flow dimples that minimizes milk flow interference, incorporates a debris barrier to prevent clogging, and optimizes vent passage dimensions to balance vacuum levels and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid vent plug is inserted in the vent hole to ensure reliable venting, then venting reliability is improved, but the plug is damaged or removed by liner twisting and impact forces
Solution Approach 1:
The vent plug material is changed from rigid to elastomeric, fundamentally altering the mechanical properties to match the flexible environment. This elastomeric material can deform under twisting and impact forces, then return to its original shape, maintaining venting reliability while surviving the dynamic conditions inside the short milk tube.
Solution Approach 2:
The vent plug is made from the same or similar elastomeric material as the short milk tube itself. This material homogeneity ensures that the vent plug flexes and deforms in harmony with the tube, preventing damage from differential stress while maintaining the vent passage open for reliable venting.
2Object-affected harmful factors
If the vent passage is sized to provide adequate venting, then cow comfort is improved, but excessive ventilation causes foaming and turbulence in milk flow
Solution Approach 1:
The vent passage dimensions are precisely controlled within specific ranges (0.3-1.5mm length, 0.1-0.5mm diameter) to optimize the balance between venting and milk flow. The elastomeric material compliance also dynamically adjusts the effective passage size based on pressure conditions, providing adequate venting for cow comfort while minimizing turbulence and foaming in the milk stream.
3Reliability
If the vent plug is made relatively rigid with a predetermined vent passage size, then adequate and predictable venting is ensured, but vacuum energy is wasted and milk quality deteriorates
Solution Approach 1:
The vent passage is designed with specific dimensional parameters (length 0.3-1.5mm, diameter 0.1-0.5mm) that create optimal flow characteristics. The elastomeric material provides compliance that dynamically regulates flow based on pressure differentials, ensuring predictable venting behavior while minimizing energy waste through reduced turbulence and vacuum pump load.
4Object-generated harmful factors
If the barbed end profile is reduced to minimize interference with milk flow, then turbulence and foaming are reduced, but the vent plug may become loose or dislodge
Solution Approach 1:
The barbed end dimensions are optimized within specific ranges (length 0.5-2.0mm, diameter 0.2-0.8mm) to provide sufficient mechanical anchoring in the vent hole while maintaining a low profile that minimizes interference with milk flow. The elastomeric material flexibility allows the barbed end to engage the vent hole walls effectively without creating excessive turbulence or foaming in the milk stream.
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 solution improves milk flow characteristics, reduces foaming, maintains proper vacuum levels, and extends the useful life of short milk tubes by minimizing turbulence and debris accumulation, thereby enhancing milking efficiency and reducing energy costs.
Implementation Method 1
The vent plug design with a barbed end and flow dimples that minimizes milk flow interference, incorporates a debris barrier to prevent clogging, and optimizes vent passage dimensions to balance vacuum levels and reduce energy consumption.
Implementation Method 2
The vent plug design with a barbed end and flow dimples that minimizes milk flow interference, incorporates a debris barrier to prevent clogging, and optimizes vent passage dimensions to balance vacuum levels and reduce energy consumption.
Implementation Method 3
The vent plug design with a barbed end and flow dimples that minimizes milk flow interference, incorporates a debris barrier to prevent clogging
Data Source
AI summary
An air vent plug assembly and milker unit short milk tube having an air vent plug assembly to improve milk flow characteristics through the short milk tube. The short milk tube includes a wall with an upstream end and a downstream end and defining a milk passage bore extending between the upstream end and the downstream end. The wall defines a vent plug mounting hole. A vent plug extends through the vent plug mounting hole and includes a cap, a shaft joined to the cap, and a barbed end joined to the shaft, the vent plug defining a vent passage to at least partially vent the milk passage bore. A flow dimple is defined in the barbed end and disposed in the milk passage bore.