Anti-drip Valve Segmentation for Inverted Liquid Dosing Nozzles
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Solution Overview
Problem
Existing dosing and dispensing systems face issues with liquid chemicals dripping from the discharge nozzle after a dosing cycle due to the liquid clinging to the nozzle's interior, despite the lower valve being in a closed position.
Innovation Solution
An anti-drip valve is integrated into the system, which closes the discharge nozzle at the end of a dosing cycle to prevent dripping and opens when the valve above the nozzle is activated for dispensing, ensuring efficient and accurate dosing and dispensing of liquids from an inverted container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single valve is used to control liquid flow, then the device complexity is reduced, but liquid may drip from the discharge nozzle after dosing due to liquid clinging to the nozzle interior
Solution Approach 1:
The liquid flow control is divided into two separate valve mechanisms: a first valve (ball valve) positioned above the discharge nozzle and a second valve (anti-drip valve) positioned at the discharge nozzle. This segmentation allows independent control of main flow and drip prevention functions, resolving the contradiction by adding functional separation rather than increasing overall complexity.
Solution Approach 2:
The first valve acts as an intermediary control mechanism that manages the main liquid flow, while the second valve serves as a dedicated intermediary for preventing liquid clinging and dripping at the discharge point. This dual-valve intermediary system ensures reliable drip prevention without requiring the single valve to perform conflicting functions.
2Reliability
If the lower valve remains closed after dosing to prevent dripping, then drip prevention is improved, but liquid cannot be dispensed when needed
Solution Approach 1:
The control function is segmented into two valves with distinct roles: the first valve controls main liquid flow for dosing operations, while the second valve specifically controls drip prevention at the discharge nozzle. This allows the first valve to remain closed for drip prevention while the second valve can be independently opened for dispensing, resolving the operational conflict.
Solution Approach 2:
The system employs dynamic control where the second valve transitions between closed (drip prevention) and open (dispensing) states independently of the first valve. This dynamic independence allows the lower valve to maintain drip prevention functionality while enabling on-demand dispensing through coordinated valve operation.
3Reliability
If the discharge nozzle interior is designed to prevent liquid clinging, then drip prevention is improved, but the nozzle design becomes more complex
Solution Approach 1:
The drip prevention function is extracted from the nozzle structure itself and implemented through a separate second valve mechanism positioned at the discharge nozzle. This extraction allows the nozzle interior to maintain its simple cylindrical design while the valve provides the drip prevention function, avoiding the need for complex nozzle geometry modifications.
Solution Approach 2:
The second valve serves as an intermediary component that prevents liquid clinging at the discharge nozzle without requiring modifications to the nozzle structure. This intermediary valve mechanism resolves the contradiction by providing drip prevention functionality while keeping the nozzle design simple and straightforward.
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 anti-drip valve effectively prevents liquid from dripping from the nozzle after a dosing cycle, maintaining precision and efficiency in the dispensing process by ensuring the liquid is released only when intended, thus enhancing the overall performance of the dosing and dispensing system.
Implementation Method 1
an anti-drip valve which closes the lower end of the discharge nozzle
Implementation Method 2
The first valve in the throat plug assembly prevents liquid from passing downwardly from the container through the first valve seat in the throat plug assembly when in its lower closed position
Implementation Method 3
The first valve in the throat plug assembly permits liquid to pass downwardly from the container through the first valve seat in the throat plug assembly when in its upper open position
Data Source
AI summary
A dosing and/or dispensing system for use with an inverted liquid container such as a bottle or the like for dosing and/or dispensing liquid contents from the bottle. The system includes an improved venting device to ensure that the liquid is dosed or dispensed properly and accurately drains; and an anti-drip valve is provided to prevent liquid from dripping from the discharge end of the dosing bowl of the system.