Fire-extinguishing spray nozzle with truncated-conical obstacle
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Solution Overview
Problem
Existing fire-extinguishing spray nozzles require high pressure to radially inject mist, and lack control over sprinkling, with previous solutions not effectively addressing the need for efficient low-pressure mist conversion and controlled sprinkling.
Innovation Solution
A fire-extinguishing spray nozzle design featuring a main body with radially injecting ports and an obstacle with a truncated-conical inclined surface, which collides with the injected liquid to produce mist, allowing for increased control over sprinkling even at low pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If high pressure is used to radially inject mist, then the mist injection range is improved, but the pressure requirement increases
Solution Approach 1:
An obstacle is introduced as an intermediary element between the liquid injection port and the external environment. The obstacle collides with the radially injected liquid stream, converting the liquid's kinetic energy into mist through impact. This mediator enables mist generation at low pressure by using the obstacle's surface to break up the liquid flow into fine droplets, thereby resolving the contradiction between achieving wide mist injection range and maintaining low pressure requirement.
2Ease of operation
If the obstacle's opposing surface diameter is reduced, then the sprinkling control is improved, but the liquid flow capacity decreases
Solution Approach 1:
The obstacle's opposing surface is designed with specific local characteristics: a diameter that is 90-100% of the injection port's inner diameter, creating a localized collision zone that efficiently converts liquid to mist while maintaining adequate flow capacity. This local geometric optimization enables precise control over the mist generation process without excessively restricting the overall liquid flow, resolving the contradiction between sprinkling control and flow capacity.
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 nozzle effectively converts low-pressure fire-extinguishing liquid into mist, providing enhanced control over sprinkling and efficient distribution, as demonstrated by the sprinkling angle and amount sprinkled just below the nozzle.
Implementation Method 1
The obstacle 36 serves to collide with the fire-extinguishing liquid radially injected from the ports 40 and 41... the fire-extinguishing liquid 70 radially injected from the ports 40 and 41 and passing around the obstacle 36 collide with the fire-extinguishing liquid 72 radially injected from the ports 40 and 41 and reflected from the inclined surface 62 to produce mist 74
Data Source
Figure 1
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Figure 4~5
AI summary
Low-pressure fire-extinguishing liquid is converted into mist. A fire-extinguishing spray nozzle (10) comprises a main body (30) and an obstacle (36). The main body (30) has a port (40) for radially injecting the fire-extinguishing liquid. The obstacle (36) is arranged within a radial injection region (102) of the fire-extinguishing liquid radially injected from the port (40). The obstacle (36) has an outer peripheral surface formed in the shape of a truncated-conical inclined surface (62). This enables the fire-extinguishing liquid (70) radially injected from the port (40) and passing around the obstacle (36) to collide with the fire-extinguishing liquid (72) radially injected from the port (40) and reflected from the inclined surface (62) so as to produce mist (74) of fire-extinguishing liquid. When producing the mist (74) by such an action, the fire-extinguishing liquid radially injected from the port (40) may have a low pressure. As a result, it is possible to provide a fire-extinguishing spray nozzle (10) which converts the low-pressure fire-extinguishing liquid into mist.