Split Spray Nozzle Assembly for Cleanable Oscillating Discharge
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Solution Overview
Problem
Liquid spray nozzles with complex internal geometries for high-pressure oscillating discharge are difficult to clean effectively, leading to potential debris buildup that can render the discharge less effective.
Innovation Solution
A multipart spray nozzle assembly with separable nozzle body parts that can be easily assembled, disassembled, and cleaned, featuring a retaining cap for secure mounting and leakage prevention, allowing full exposure of internal geometry for thorough cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a complex internal geometry is used to establish oscillating high pressure liquid discharge, then the spray effectiveness is improved, but the ease of cleaning deteriorates
Solution Approach 1:
The nozzle body is divided into multiple separable parts (first nozzle body, second nozzle body, third nozzle body) that can be easily disassembled for cleaning. This segmentation allows access to internal geometries that would otherwise be difficult to reach, resolving the contradiction between complex internal geometry for spray effectiveness and ease of cleaning.
2Ease of manufacture
If the nozzle body is made as a single integrated part, then the manufacturing simplicity is improved, but the ease of cleaning deteriorates
Solution Approach 1:
The nozzle is designed with separable bodies connected by threaded fittings, allowing it to be disassembled into multiple parts for cleaning. This segmentation maintains manufacturing simplicity through standardized threading while enabling easy access to internal channels for thorough cleaning.
3Ease of operation
If the nozzle parts are easily separable for cleaning, then the ease of cleaning is improved, but the reliability deteriorates due to potential leakage
Solution Approach 1:
Threaded fittings with sealing surfaces are provided at the interfaces between separable nozzle parts. These sealing features are built into the design before assembly, ensuring that when parts are reassembled after cleaning, they maintain reliable sealing performance without leakage.
4Ease of operation
If chemical flushing is used to achieve sanitation, then the cleaning effectiveness is improved, but the loss of substance increases due to chemical consumption
Solution Approach 1:
By dividing the nozzle into separable parts, the design enables mechanical cleaning and sanitization of individual components. This reduces or eliminates the need for chemical flushing, thereby reducing chemical consumption while maintaining cleaning effectiveness.
Data Source
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Figure 5
AI summary
A spray nozzle assembly (10) for producing an oscillating spray discharge is provided. The spray nozzle assembly (10) includes a nozzle body (14) with a liquid inlet passage (18) that converges via an inwardly converging conical section (19) that defines a liquid inlet orifice (20). An expansion chamber (21) communicates in a downstream direction with the liquid inlet orifice (20). An exit orifice (22) communicates in the downstream direction with the expansion chamber. A pair of longitudinal veins (28a, 28b) and a pair of outwardly disposed feedback passages (30a, 30b) are provided in the expansion chamber (21). Each vein (28a, 28b) defines a respective downstream orifice (31a, 31b) to a respective one of the feedback passages (30a, 30b) adjacent the exit orifice (22) and an upstream orifice (32a, 32b) to the respective one of the feedback passages (30a, 30b) adjacent the inlet orifice (20).