Blowing Machine Pipe Venting for Dust and Compaction Control
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Solution Overview
Problem
The use of high-pressure air to spray loose-fill insulating products like glass wool or rock wool can lead to dust raising and excessive compaction, reducing insulation effectiveness.
Innovation Solution
A blowing machine with a pipe featuring an evacuation orifice and a shutoff device, along with a filtration device, controls air pressure and flow rate to prevent dust and compaction, allowing for uniform insulation distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-pressure air is used to spray loose-fill insulating product, then the insulating product can be transported effectively from the base to the outlet, but dust is raised and the insulating product is excessively compacted
Solution Approach 1:
The pipe is divided into multiple sections with evacuation orifices at different locations along its length. This segmentation allows the air flow to be controlled in stages, reducing pressure and flow rate progressively as the insulating product moves through the pipe, thereby preventing dust raising and excessive compaction at the outlet while maintaining effective transport
Solution Approach 2:
Evacuation orifices are introduced as intermediary elements that allow controlled release of excess air pressure along the pipe length. These orifices act as mediators between the high-pressure air source and the outlet, gradually reducing the air flow rate to prevent harmful effects while maintaining transport efficiency
2Object-affected harmful factors
If the air flow rate at the inlet is reduced to avoid dust and compaction, then the harmful effects are reduced, but the insulating product circulates at too low a speed to be sprayed correctly
Solution Approach 1:
The air flow control is segmented into multiple stages along the pipe length rather than applying a single reduction at the inlet. Evacuation orifices positioned at different locations allow progressive pressure reduction, maintaining high circulation speed in the initial sections for proper spray performance while reducing pressure in later sections to prevent dust and compaction
Solution Approach 2:
The system dynamically adjusts air pressure at different locations along the pipe through the evacuation orifices. The orifices enable the air flow rate to vary along the pipe length, maintaining optimal speed for product circulation in upstream sections while reducing pressure downstream to prevent harmful effects
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 solution effectively reduces dust and compaction issues while maintaining adequate insulation quality by adjusting air flow without altering the inlet flow rate, ensuring proper product distribution.
Implementation Method 1
the at least one evacuation orifice being configured to allow the passage of air toward the exterior of the pipe... the at least one evacuation orifice then allows air to pass from the space of the pipe to the exterior of said pipe in order to reduce the pressure and the flow rate of air in the pipe
Implementation Method 2
the pipe comprises at least one shutoff device for the at least one evacuation orifice, the shutoff device being movable along the longitudinal direction of the pipe
Implementation Method 3
a filtration device is disposed so as to cover the at least one evacuation orifice
Data Source
AI summary
A machine for blowing a loose-fill insulating product, includes at least a base and a pipe for transporting the insulating product, the base including at least an air inlet, an inlet for loose-fill insulating product and an outlet connected to the pipe, the pipe including at least one cylindrical wall which delimits a space configured for the passage of the loose-fill insulating product and the air, the blowing machine including at least one evacuation orifice formed through the cylindrical wall of the pipe, the at least one evacuation orifice being configured to allow the passage of air toward the exterior of the pipe and block the passage of the loose-fill insulating product.