Long-Distance Fluid Ejection Nozzle With Direction Switching
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Solution Overview
Problem
Conventional fire fighting nozzles face limitations in increasing the ejection distance of fluid by simply adjusting the cross-sectional area of the flow passage.
Innovation Solution
A long-distance fluid ejection device with a nozzle featuring a circular flat plate shape and multiple fluid ejection holes on concentric circles, each with a direction switching unit that directs fluid obliquely toward the center axis, increasing flow velocity and distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the cross-sectional area of the flow passage is narrowed to increase flow velocity, then the ejection distance of fluid is improved, but the device complexity and structural simplicity are worsened
Solution Approach 1:
The nozzle is divided into multiple independent ejection holes arranged in concentric circles, with each hole containing a direction switching unit. This segmentation allows the fluid flow to be divided into multiple streams that can be independently directed, achieving complex flow control without requiring a complex overall structure. The segmentation of the flow passage into multiple small holes rather than one large variable-area passage simplifies the mechanical adjustment mechanisms.
Solution Approach 2:
The direction switching unit within each ejection hole can dynamically change the orientation of the hole, switching between a first direction and a second direction. This dynamic capability allows the nozzle to adaptively control fluid ejection patterns without requiring complex external control systems. The movable direction switching unit enables real-time adjustment of flow direction while maintaining a relatively simple fixed nozzle body structure.
2Length of stationary object
If multiple fluid ejection holes are disposed on concentric circles with direction switching units, then the ejection distance is improved through flow concentration, but the manufacturing complexity increases
Solution Approach 1:
The nozzle structure implements local quality by positioning ejection holes with specific orientations at different radial distances from the center. Holes on inner concentric circles have different directional configurations compared to holes on outer circles. This local differentiation optimizes flow concentration at the center axis while maintaining manufacturability through modular hole patterns that can be fabricated using standard drilling and machining operations.
Solution Approach 2:
The direction switching units create asymmetric flow patterns within the otherwise symmetric circular nozzle structure. Each ejection hole can orient its flow direction asymmetrically relative to the nozzle center, allowing control over flow convergence. This asymmetric capability is achieved through simple rotational features or adjustable inserts within each hole rather than complex asymmetric nozzle geometry, balancing performance with manufacturing ease.
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 device enables fluid to be ejected farther away by concentrating flow rate and velocity, effectively enhancing fire suppression capabilities without complex configurations.
Implementation Method 1
the fluid ejected through the fluid ejection hole is ejected obliquely toward the center axis to form a single stem in the center axis. Accordingly, it is possible to eject the fluid farther away.
Data Source
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AI summary
Disclosed is a long-distance fluid ejection apparatus. A nozzle for long-distance fluid ejection according to an embodiment of the present invention comprises: a main body connected with a hose which flows fluid within the inner portion thereof; a nozzle which has a circular flat plate shape and includes a plurality of fluid spray holes, the further from the center of the nozzle the number of which relatively increases, and which is equipped at the front end of the main body; and a coupling unit for coupling the nozzle to the main body. The plurality of fluid spray holes each comprises: an opening; and a direction switching unit projected to the inside of the opening along the radial inward direction of the nozzle.