Fluid Dispense System Valve Control and Foam Reduction
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Solution Overview
Problem
Conventional fluid dispense systems for high purity and corrosive liquids face issues with uncontrolled recirculation passageways leading to spillage, foam creation, and difficulty in connecting coded dispense heads to drum inserts, which can result in contamination and inefficient drum emptying.
Innovation Solution
The system incorporates valve assemblies within the main and recirculation passageways that automatically cut off fluid flow when the dispense head is removed, a recirculation conduit that discharges fluid into an annular space around the drum insert down tube, and a coupling assembly for easy alignment and connection of coded components, along with a foam reduction diffuser to minimize foaming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If recirculation passageways are provided in the dispense head, then fluid can be recirculated to the drum, but the passageways remain uncontrolled and open when the dispense head is not connected, creating spillage potential
Solution Approach 1:
The system uses the act of connecting the dispense head to the drum insert to automatically open the recirculation valve, and disconnecting to automatically close it. The mechanical coupling itself triggers the valve state change without requiring external control, making the system self-regulating and eliminating the spillage risk of uncontrolled open passageways.
2Adaptability or versatility
If recirculation is enabled, then fluid can be returned to the drum, but foam is created that causes contamination and clogging problems
Solution Approach 1:
The foam separator is integrated into the drum insert structure, specifically in the annular space between the drum insert wall and the down tube. This extracts the foam separation function from the main dispense head and places it at the recirculation inlet, where foam can be separated before contaminating other system components.
3Reliability
If coded indexing sections are provided to prevent incorrect liquid connection, then safety is improved, but connection requires great force and a two-step operation
Solution Approach 1:
The coding verification and mechanical coupling functions are merged into a single simultaneous action. The coded indexing sections on the dispense head and drum insert must align for the coupling to engage, so the safety check and connection happen together in one motion rather than requiring separate alignment and coupling steps.
4Reliability
If conventional connection methods are used, then coded components can be assembled, but the process is complex and time-consuming
Solution Approach 1:
The complex multi-step mechanical alignment and coupling process is replaced with a simpler system where the coded indexing sections guide automatic alignment. The code key on the dispense head fits into the coded section on the drum insert, providing both verification and alignment in one mechanical feature, eliminating the need for separate alignment and coupling operations.
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
This solution prevents spillage, reduces foam creation, simplifies the connection process of coded components, and ensures efficient recirculation and emptying of drums by controlling fluid flow and using a diffuser to separate gas from recirculated fluid.
Implementation Method 1
A foam reduction diffuser can further reduce or eliminate foam that can be created during this recirculation process
Data Source
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AI summary
A fluid dispense system for use with a drum having a drum insert configured to couple with a bung included on a drum, the drum insert having an upper portion and a drum insert down tube extending therefrom into an interior of the drum. The system further having a dispense head configured to couple with the drum insert, the dispense head having first and second conduits, each having a valve assembly, the valve assemblies in operable communication with the drum insert when the dispense head is coupled with the drum insert. When the dispense head is coupled with the drum insert the first and second valve assemblies are effected to an open position enabling fluid to flow through the conduits. When the dispense head is not coupled with the drum insert the first and second valve assemblies are biased to a closed position inhibiting fluid from flowing through the conduits.