Self-Closing Dosing Tip for Low-Pressure Drip-Free Fluid Dosing
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Solution Overview
Problem
Existing dosing units for small fluid quantities face issues with dosing accuracy due to fluid dripping and require high pressure, which affects precision and efficiency.
Innovation Solution
A dosing unit with a fluid guiding module, solenoid valve, and an elastic, self-closing outlet nozzle in the dosing tip that opens at low pressure (1-2 bar) and automatically closes, ensuring precise dosing without dripping, using a design with multiple closing surfaces and magnetic elements for improved centering and closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional dosing unit is used, then fluid can be dosed, but dosing accuracy deteriorates due to dripping after dosing
Solution Approach 1:
The invention extracts the problematic dripping function from the dosing system by introducing a separate self-closing outlet nozzle that automatically closes after fluid discharge. This isolated closing mechanism prevents the harmful dripping effect while maintaining the dosing function, directly resolving the contradiction between dosing completion and dripping prevention.
Solution Approach 2:
The invention changes the pressure parameter by implementing a self-closing outlet nozzle that operates at low pressure (1-2 bar) compared to conventional high-pressure systems. The elastic membrane and magnetic elements create a pressure-sensitive closing mechanism that automatically seals when pressure drops, eliminating dripping without requiring high pressure to maintain closure.
2Productivity
If high pressure (10 bar or more) is used for dosing, then fluid can be dosed, but pressure requirements increase
Solution Approach 1:
The invention replaces the conventional high-pressure mechanical dosing system with a low-pressure system utilizing elastic membrane deformation and magnetic field forces. The magnetic elements (permanent magnets and magnetizable material) provide the closing force at low pressure, substituting the need for high mechanical pressure while maintaining effective dosing capability.
Solution Approach 2:
The invention uses composite functionality combining an elastic membrane with magnetic elements to achieve pressure-sensitive closing at low pressure. The elastic material provides the structural framework while magnetic materials provide the actuating force, creating a composite system that operates effectively at 1-2 bar instead of requiring 10 bar or more.
3Measurement precision
If an elastic outlet nozzle is used, then dosing precision improves, but device complexity increases
Solution Approach 1:
The invention segments the outlet nozzle into distinct functional components: an elastic membrane for structural flexibility, magnetic elements for actuation, and a housing for integration. This segmentation allows each component to be optimized independently and simplifies manufacturing and assembly, reducing overall device complexity while maintaining dosing precision.
Solution Approach 2:
The self-closing outlet nozzle is designed to automatically close using its own elastic restoring force and magnetic attraction when fluid pressure drops, without requiring external control mechanisms. This self-service capability eliminates the need for additional actuators, sensors, or control systems, thereby reducing device complexity while achieving precise dosing control.
4Adaptability or versatility
If numerous dosing tips are screwed into the fluid guiding module, then numerous outlets are provided, but manufacturing complexity increases
Solution Approach 1:
The invention segments the multi-outlet dosing system into modular dosing tips that can be independently manufactured and then assembled by screwing into the fluid guiding module. Each dosing tip is a standardized unit containing the elastic membrane and magnetic elements, allowing for simplified individual manufacturing while achieving versatile multi-outlet functionality through modular assembly.
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 dosing of small fluid quantities with reduced pressure requirements, preventing dripping and allowing for quick and reliable fluid delivery, even with larger nominal widths, while being easy to manufacture and maintain.
Implementation Method 1
the outlet nozzle being made of an elastic material and having a closed state in which the outlet nozzle closes a fluid outlet (26) and an open state in which the outlet nozzle opens the fluid outlet (26)
Implementation Method 2
at least two mutually attracting magnetic elements which urge the outlet nozzle into a closed position
Data Source
AI summary
A dosing unit for dosing fluids includes a fluid guiding module having a fluid inlet and a fluid outlet, a solenoid valve for controlling or regulating a fluid flow through the fluid guiding module, and a dosing tip, the fluid outlet of the fluid guiding module leading to the fluid inlet of the dosing tip, and the dosing tip having an elastic, self-closing outlet nozzle. Furthermore, a dosing station and a dosing tip are specified.