Multi-Part Valve Element Design for Dosing Dispensers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dosing dispensers have delicate manufacturing tolerances and require low swelling behavior of resilient materials, which is not guaranteed with aggressive components, leading to unreliable dosing.
Innovation Solution
A multi-part valve element design with separate inlet and outlet valves, each composed of multiple components, including a plate spring intermediate element, allows for different materials and functions, and a sealing collar with a central borehole for optimal sealing and flow control, accommodating greater manufacturing tolerances and swelling behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single integrated valve element is used, then the structure is simple, but the manufacturing tolerance requirements are tight and swelling behavior must be controlled
Solution Approach 1:
The valve element is divided into multiple separate components (inlet valve, outlet valve, and intermediate element) that can be manufactured independently with standard tolerances, then assembled together. This segmentation eliminates the need for tight tolerances in a single integrated component while maintaining valve functionality.
2Reliability
If resilient materials are used for valve components, then the valve can seal effectively, but the materials swell when exposed to aggressive components
Solution Approach 1:
Different parts of the valve system are made from different materials suited to their specific functions and chemical environments. The intermediate element and valve bodies use materials resistant to swelling from aggressive components, while separate resilient sealing elements provide necessary sealing without being exposed to the full range of aggressive chemicals.
Solution Approach 2:
The intermediate element acts as a mediator between the inlet and outlet valves, providing a sealing surface that is not directly exposed to aggressive components while still enabling effective sealing. This intermediary component protects the resilient sealing elements from direct contact with swelling-inducing chemicals.
3Measurement precision
If tight manufacturing tolerances are enforced, then dosing accuracy is improved, but manufacturing difficulty and cost increase
Solution Approach 1:
By segmenting the valve into separate manufacturable components, each can be produced with standard tolerances using conventional manufacturing processes. The assembly of these components achieves the necessary dosing accuracy without requiring tight tolerances in individual parts, thereby easing manufacturing difficulty and reducing costs.
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 design simplifies manufacturing, allows for higher tolerance in production, and ensures secure dosing by enabling the use of various materials and compensating for manufacturing variations without impairing valve function, ensuring reliable component discharge.
Implementation Method 1
In case of opposite movement of the piston, i.e. a compression, the component is compressed and pressed out via an outlet valve
Implementation Method 2
the component to be discharged is sucked at a vacuum in the pumping chamber from the receiving compartment by an inlet valve into the pumping chamber
Data Source
AI summary
In a dispenser for dosing of at least one component received in a receiving compartment, a valve device, forming an inlet valve and an outlet valve associated with an outlet opening, is formed of at least two valve elements.