Multistage Piston Regulator for Compressed Gas Cylinders
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Solution Overview
Problem
Existing gas dispensing systems for high-pressure cylinders face safety concerns due to external high-pressure lines and internal pressure regulators that lack a constant reference pressure, and occupy excessive space, making them unsuitable for traditional cylinders.
Innovation Solution
A pressure control valve assembly with a multistage piston regulator integrated within the cylinder, allowing for a constant output pressure and axial extension, enabling insertion into standard cylinders without enlarging the threaded hole, using a two- or three-stage piston regulator with sliding flow control pistons and a toroidal spring mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an internal pressure regulator is used within the cylinder, then safety is improved by eliminating external high-pressure lines, but the regulator occupies excessive space making it incompatible with traditional cylinders
Solution Approach 1:
The pressure regulator is divided into multiple stages (first stage, second stage, third stage) that are arranged in series within the cylinder. Each stage performs partial pressure reduction, allowing the regulator to fit within the limited space of traditional cylinders while maintaining safety by eliminating external high-pressure lines.
Solution Approach 2:
The pressure regulator components are arranged axially along the cylinder axis, utilizing the longitudinal dimension of the cylinder. This axial arrangement allows multiple regulator stages to be accommodated within the cylinder's length without requiring excessive transverse space, making it compatible with traditional cylinder dimensions.
2Reliability
If an internal pressure regulator is used within the cylinder, then safety is improved by eliminating external high-pressure lines, but the regulator complexity increases
Solution Approach 1:
The pressure regulation function is segmented into multiple stages, where each stage handles a portion of the pressure reduction. This segmentation allows each individual regulator component to be simpler in design while collectively achieving the overall pressure reduction from high pressure to operating pressure, thereby improving safety without excessive complexity.
3Stress or pressure
If a membrane-type reduction unit is used, then pressure reduction is achieved, but the transverse space occupation is incompatible with traditional cylinder coupling holes
Solution Approach 1:
The pressure reduction unit is reoriented from a transverse arrangement to an axial arrangement along the cylinder axis. This dimensional change allows the pressure reduction components to fit through the standard coupling hole and be accommodated within the cylinder's longitudinal space, eliminating the incompatibility with traditional cylinder dimensions.
Solution Approach 2:
The pressure reduction function is divided into multiple axial stages that can be arranged in series along the cylinder axis. This segmentation allows the pressure reduction unit to have a compact transverse profile that fits through standard coupling holes while achieving the required pressure reduction through the multi-stage axial arrangement.
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 provides a reliable, space-efficient, and safe gas dispensing system with a constant output pressure, suitable for traditional cylinders, enhancing simplicity and reducing production costs while ensuring safe operation with high-pressure gases.
Implementation Method 1
a first duct (5) for gas exiting from the cylinder (B), having two portions (9, 10) connected respectively to a delivery neck (6) and to a piston regulator (7)
Implementation Method 2
The valve body (2) comprises a second duct (22) extending predominantly in a direction that is parallel to the portion (9) of the first duct (5), for connection between an ambient pressure zone and outside the valve, so that said external pressure acts on the shoulder (16)
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A pressure control valve assembly for containers adapted to contain compressed and liquefied gases, comprising a valve body that can be applied to a container for gases and the like, in which a first duct for the gas in output from said container and a pressure regulator device connected to the inside of said container and to said first duct are defined, said pressure regulator device being fully placeable within said container, said regulator device comprising at least one regulator of the piston type.