Fuel Nozzle Drip Catcher Integration and Shrinkable Coating
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Solution Overview
Problem
Existing automatic dispensing valves for diesel fuel at gas stations face issues with additional costs due to separate diesel drip collectors, mechanical wear of soft plastic protective covers, exposure to external stresses, and potential overflow, leading to environmental contamination.
Innovation Solution
An integrated return drip collector within the housing connection piece of the dispensing valve, utilizing a metal housing with a return channel and receiving chamber, and a shrinkable plastic protective coating for sealing, eliminating the need for additional components and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate cylindrical return droplet collector is added to the nozzle, then diesel fuel residue can be collected, but device complexity and cost increase
Solution Approach 1:
The return droplet collector is integrated into the housing connection piece, merging two previously separate components (housing connection piece and return droplet collector) into a single unified structure. This eliminates the need for a separate cylindrical return droplet collector while maintaining the fuel residue collection function, thereby reducing device complexity and cost.
2Reliability
If a soft plastic protective cover is added to the nozzle, then protection is provided, but mechanical wear increases and replacement frequency increases
Solution Approach 1:
The protective cover material is modified to have fuel-resistant properties through parameter changes in material composition or treatment. This enables the protective cover to resist diesel fuel degradation, maintaining its mechanical integrity and protective function over extended periods, thereby increasing service life and reducing replacement frequency.
3Object-affected harmful factors
If the receiving chamber volume is increased, then overflow is prevented, but device complexity and size increase
Solution Approach 1:
The return droplet collector is nested within the housing connection piece, with the receiving chamber utilizing the internal space of the housing connection piece. This nested arrangement allows the receiving chamber to have sufficient volume to prevent overflow during rapid refueling operations, while the overall device size remains compact and does not require additional external space.
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 design reduces costs, prevents environmental contamination, ensures long-term reliability, and effectively collects diesel fuel residues without additional components, offering a significant economic and environmental advantage.
Implementation Method 1
the plastic material is provided with the proviso is set up so that it shrinks when exposed to the diesel fuel and thus has a sealing effect
Data Source
Figure 1
Figure 2
AI summary
The valve has a tap pipe (1) engaged in a housing support (3), and a recirculating drop collector (4) integrated in the housing support. A return channel (5) of the drop collector is attached to a retaining chamber (8) of the drop collector, where the chamber is arranged in the housing support or in housing (2). The housing support is coated with a protective coating (11) made of a plastic material, which is provided with a proportion such that the material shrinks during exposure of the diesel oil and the material is sealed.