Self-Aligning Spray Valve Nozzle Structure for Leak-Free Closure
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Solution Overview
Problem
Conventional spray valves face issues with misalignment of the moving pin and spray nozzle, leading to gaps and adhesive leakage due to manufacturing errors, necessitating time-consuming manual adjustments during assembly.
Innovation Solution
The spray valve design incorporates a conical impact end on the moving pin and a corresponding positioning conical portion on the spray nozzle, allowing for a sliding fit and automatic alignment within a positioning groove, eliminating manufacturing errors and ensuring concentricity without fixed assembly, thus preventing adhesive leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the spray nozzle is directly screwed onto the valve body, then the assembly structure is simple, but manufacturing errors cause misalignment between the moving pin and mating groove, resulting in adhesive leakage
Solution Approach 1:
The patent introduces a positioning groove as an intermediary structure between the valve body and spray nozzle. This positioning groove acts as a mediator that guides and aligns the moving pin with the mating groove, eliminating misalignment caused by direct screwing. The positioning groove receives and constrains the moving pin, ensuring proper concentricity and preventing adhesive leakage while maintaining assembly simplicity.
2Manufacturing precision
If manual adjustment is performed to ensure concentricity, then alignment precision is improved, but assembly time and complexity increase significantly
Solution Approach 1:
The patent implements self-alignment through the positioning groove structure. The positioning groove automatically guides the moving pin into correct concentric alignment with the mating groove during assembly, without requiring manual adjustment. The geometry of the positioning groove and moving pin creates a self-correcting mechanism that ensures proper alignment is achieved automatically, eliminating time-consuming manual operations while maintaining high precision.
3Strength
If the spray nozzle is rotated and screwed onto the valve body, then fastening is achieved, but the spray nozzle deflects in any direction causing misalignment
Solution Approach 1:
The patent applies preliminary alignment action through the positioning groove before the final fastening operation. The positioning groove pre-positions and constrains the moving pin in the correct orientation and location relative to the mating groove. This preliminary alignment prevents nozzle deflection during the screwing operation, ensuring that when fastening is completed, the components are already properly aligned without requiring subsequent adjustment.
Data Source
AI summary
A spray valve has a valve body, a moving pin, an air-passage seat, and a nozzle structure. The moving pin is mounted within the valve body, is linearly movable relative to the valve body, and has an impact end. The air-passage seat has a connecting portion screwed onto the valve body and a positioning groove. The nozzle structure has a nozzle seat and a spray nozzle. The nozzle seat is movably accommodated in the positioning groove. The spray nozzle is in sliding fit with the nozzle seat and has a positioning conical portion. The positioning conical portion corresponds to the impact end of the moving pin and is configured to contact the impact end of the moving pin.