Self-Regulating Pressure Reduction Valve for Paint Spraying
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Solution Overview
Problem
Existing paint spraying devices are inefficient for delicate applications requiring high-quality finishes, as they result in paint loss and operator strain due to large pipe diameters and high solvent usage, and prior pressure reduction technologies do not achieve optimal pressure reduction.
Innovation Solution
A self-regulating pressure reduction device that balances outlet pressure with a control pressure using a valve system where the rod connecting the balancing means and shutter element does not pass through the passage orifice, allowing for optimal pressure reduction and maintaining constant outlet pressure without external intervention, using a small-diameter pipe and high inlet pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a large diameter flexible pipe is used to supply paint to the spraying device, then the paint can be supplied over long distances (5m to 45m), but the pipe weight increases significantly (around ten kilograms) causing operator strain and risk of tendonitis
Solution Approach 1:
The patent changes the pressure parameter in the paint supply system, using high inlet pressure (60-250 bars) to enable the use of small diameter pipes instead of large diameter pipes, thereby reducing pipe weight while maintaining supply capability over long distances
2Length of stationary object
If a large diameter flexible pipe is used to supply paint, then paint can be delivered to distant surfaces, but the large quantity of paint stored in the pipe must be washed out using solvent, resulting in paint loss and increased solvent usage
Solution Approach 1:
The patent applies high pressure parameters to reduce pipe diameter, which directly reduces the internal volume of the pipe and consequently the amount of paint stored within it, minimizing paint loss during washing operations
3Productivity
If high inlet and outlet pressures (60-250 bars) are used for paint application, then painting can be done manually with pneumatic spraying technique, but the device is absolutely not suitable for delicate applications requiring high quality finish and homogeneous paint layer
Solution Approach 1:
The patent introduces a pressure reducing valve as an intermediary device between the high pressure paint supply system and the spraying gun, enabling the decoupling of supply pressure from application pressure, thus allowing high efficiency transport while maintaining delicate application quality
Solution Approach 2:
The patent transforms the pressure parameter from high (60-250 bars at inlet) to low (1-4 bars at outlet) through the pressure reducing valve, enabling delicate applications with high quality finish while maintaining productive paint supply
4Manufacturing precision
If a pressure reducer is incorporated into the gun to reduce inlet pressure greatly, then low outlet pressure can be achieved for delicate application, but the device complexity increases
Solution Approach 1:
The patent extracts the pressure reduction function from the spraying gun itself and places it in the supply line, allowing the gun to remain simple while the pressure control is handled by a separate valve mechanism in the paint delivery system
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
Reduces paint loss and solvent usage, decreases operator strain by minimizing pipe weight and washing time, while maintaining consistent outlet pressure for improved finish quality.
Implementation Method 1
comprising means for balancing the outlet pressure at a control pressure and a valve making it possible to regulate and reduce the inlet pressure controlled by said balancing means
Implementation Method 2
using a small-diameter pipe and high inlet pressure
Data Source
Figure 1~2
Figure 3~4B
Figure 5~6
AI summary
The invention relates to a device for self-regulation and reduction of an output pressure (Ps) according to an input pressure (Pe), intended for being installed in a paint spraying device, the self-regulation and reduction device including a means (28) for balancing the output pressure (Ps) with a control pressure (Pp) and a valve (30) suitable for regulating and reducing the input pressure (Pe) controlled by said balancing means (28), so as to limit the output pressure (Ps) by maintaining said pressure substantially constant in an self-contained manner, said valve (30) comprising a flow-through opening (42) arbitrarily blocked by a blocking element (46) connected by a rod (50) to the balancing means (28), characterised in that the rod (50) connecting the balancing means (28) and the blocking element (46) does not pass through the flow-through opening (42), said balancing means (28) and the blocking element (46) being arranged on the same side relative to the flow-through opening (42).