Pneumatic Two-Fluid Nozzle Sealing and Filtration
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Solution Overview
Problem
Existing systems for applying surface function coatings, such as release agents, suffer from nozzle wear leading to inconsistent application and harmful substance concentrations, reducing their service life and increasing pollution in industrial environments.
Innovation Solution
A pneumatic two-component nozzle system with a sealed connection to a storage vessel and a filter for pressure equalization, featuring an adjustable needle valve and screw insert for precise liquid and gas control, ensuring consistent coating application and minimizing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional spray nozzles are used for applying release agents, then the coating application is simple and quick, but the nozzles suffer from wear and tear leading to insufficient spray jet and increased consumption of release agent
Solution Approach 1:
The invention extracts and removes the harmful contaminants from the system by introducing a filter element that captures dust and other particles from the compressed air before they can enter the nozzle and cause wear. This separates the contamination removal function from the spray application function, allowing the nozzle to operate cleanly and reliably for extended periods.
Solution Approach 2:
The invention applies beforehand cushioning by pre-filtering the compressed air supply through a filter element mounted in the nozzle body. This protective measure is implemented before the contaminants can reach and damage the nozzle internal surfaces, cushioning against wear and extending service life while maintaining consistent spray performance.
2Reliability
If more release agent is applied to compensate for nozzle wear, then the spray jet performance is maintained, but the concentration of harmful substances at the workplace increases
Solution Approach 1:
The filter element extracts and removes contaminants from the compressed air supply, preventing them from causing nozzle wear that would otherwise require increased release agent application. This maintains consistent spray performance without increasing pollutant concentrations in the workplace environment.
Solution Approach 2:
The invention implements a feedback mechanism where the filter element continuously cleans the compressed air supply, ensuring consistent spray jet performance and stable release agent consumption. This eliminates the need for increasing application rates to compensate for nozzle degradation, thereby maintaining safe workplace air quality.
3Ease of manufacture
If the connection between nozzle and storage vessel is not sealed, then the system is simpler and easier to assemble, but contamination from the industrial environment enters the storage vessel and accelerates nozzle wear
Solution Approach 1:
The invention merges the sealing function with the filter element by integrating a seal ring directly onto the filter component. This combination simultaneously provides both sealing against contamination and filtration of particles, eliminating the need for separate sealing elements while protecting the nozzle from wear-causing contaminants.
Solution Approach 2:
The filter element is constructed as a composite component combining filtering material with integrated sealing elements (seal rings). This composite structure provides both filtration and sealing functions in a single element, preventing contamination entry while maintaining nozzle reliability without complicating the assembly process.
4Device complexity
If contaminants enter the storage vessel through unsealed connections, then the system remains simple, but the functional coating effect becomes insufficient and nozzle wear increases
Solution Approach 1:
The seal ring is integrated directly onto the filter element, merging the sealing and filtration functions into a single component. This prevents contamination from entering the storage vessel, ensuring consistent coating quality and preventing nozzle wear, while adding minimal complexity to the connection structure.
Solution Approach 2:
The filter element with integrated seal ring acts as an intermediary component between the compressed air supply and the nozzle internal passages. It mediates by blocking contaminants and sealing the connection, thereby protecting the coating application quality and nozzle precision without requiring complex sealing arrangements.
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 system provides reproducible and efficient application of surface function coatings with extended nozzle life, reduced pollutant concentrations, and improved workplace safety by preventing contamination and ensuring consistent coating quality.
Implementation Method 1
a compressed gas source, in particular a compressed air source, which can be connected to the respective two-component nozzle in order to convey the surface function coating liquid according to the principle of a jet pump or injector nozzle
Data Source
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AI summary
The invention relates to a system for applying temporary surface coatings by spraying through one or more pneumatic two-fluid nozzles with nozzle bodies connected to at least one reservoir, wherein the reservoir is filled or fillable with sprayable surface coating fluid and furthermore with a compressed gas, in particular compressed air, source which can be connected to the respective two-fluid nozzle in order to convey the surface coating fluid according to the principle of a jet pump or injector nozzle and apply it by spraying to a surface to be treated. According to the invention, the connection between the respective two-fluid nozzle and the reservoir is sealed and an opening provided on the reservoir for pressure equalization has a filter body or a filter element.Furthermore, each two-fluid nozzle is designed as a minimum quantity nozzle valve with an actuating device in the nozzle body.