Mist Pipe With Nested Pipes For Droplet Control
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Solution Overview
Problem
Conventional mist pipes generate a broad droplet spectrum with a high proportion of large droplets that do not float, which impairs the efficiency of active ingredient delivery in mist form, particularly when using water as a carrier material.
Innovation Solution
The mist pipe is designed with at least four pipes that partially overlap to form annular chambers, increasing in radius towards the end, with suction openings to catch and break apart larger droplets, ensuring only floating aerosols are discharged, thereby controlling droplet size distribution and increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional mist pipe is used, then the structure is simple, but a broad droplet spectrum with large non-floating droplets is generated
Solution Approach 1:
The mist pipe is divided into multiple nested pipes (first pipe, second pipe, third pipe, fourth pipe) that are partially inserted into one another, forming annular chambers. Each pipe segment contributes to controlling droplet size, with the fourth pipe specifically designed to catch and remove large droplets. This segmentation allows precise control over droplet size distribution while maintaining a relatively simple overall structure.
2Productivity
If water is used as carrier material, then the throughput can be increased, but large droplets that do not float are generated
Solution Approach 1:
The fourth pipe is specifically designed to extract and remove large droplets from the mist stream. The fourth pipe projects axially past the third pipe, creating an annular chamber where large droplets that fail to atomize properly can be caught and separated. This extraction mechanism allows high throughput of water-based mist material while ensuring that only properly sized floating droplets are discharged.
3Manufacturing precision
If multiple nested pipes are used, then droplet size control is improved, but the device complexity increases
Solution Approach 1:
The mist pipe employs a nested doll configuration where the second pipe is partially inserted into the first pipe, the third pipe is partially inserted into the second pipe, and the fourth pipe is partially inserted into the third pipe. This nesting arrangement achieves precise droplet size control through multiple annular chambers while minimizing the overall device footprint and reducing structural complexity compared to using separate independent pipes.
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 configuration achieves an optimal droplet spectrum with a significant increase in water-based mist material throughput, ensuring efficient delivery of active ingredients as aerosols with minimal large droplets, enhancing application efficiency.
Implementation Method 1
The exhaust gas/cooling air stream flowing through the mist pipe at high speed generates via the suction opening of the third pipe a vacuum in the annular passage
Implementation Method 2
Here they are entrained by the exhaust gas/cooling air stream and broken apart
Data Source
AI summary
Such apparatuses are used for discharging active substances along with various carrier media, water often being used as a carrier medium. In order to ensure that the water perfectly nebulizes together with the active substance, the mist pipe (10) comprises at least three additional pipes (3 to 6) which partly surround each other to form annular chambers (31 to 33). Such a mist pipe (10) allows the size distribution of the drops to be kept within narrow limits even when water is used as a carrier medium. The nebulizer and the mist pipe (10) are mainly used in the health sector, in agriculture, plantations and greenhouses, for protecting supplies and for disinfection purposes on humans, in animal husbandry, and in food production.