Gas Pressure Reducer Lever Shut-Off for Under-Pressure Safety
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Solution Overview
Problem
Conventional pressure reducers lack an effective and cost-efficient mechanism to safely shut off gas flow in case of under-pressure conditions, such as impurities sealing the gas intake or leaks downstream, which can lead to safety hazards and require intervention to restore proper operation.
Innovation Solution
A pressure reducer design featuring a flexible diaphragm, a two-part regulation lever with a stop mechanism, and elastic means to bias the diaphragm towards a minimum volume, ensuring the gas intake is sealed when pressure drops, along with a visible safety indicator to alert users of the safety configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pressure reducer design is used, then the structure is simple and cost-effective, but it lacks an effective under-pressure safety shut-off mechanism
Solution Approach 1:
The patent combines the safety shut-off function with the existing pressure regulation mechanism by integrating a stop mechanism into the body that interacts with the regulation lever. This merging approach allows the safety function to be added without requiring a separate independent system, thus improving reliability while minimizing the increase in device complexity
Solution Approach 2:
The safety mechanism operates automatically based on pressure conditions without requiring external control or additional power sources. The elastic means (spring) and stop mechanism work together to automatically shut off gas flow when under-pressure conditions are detected, allowing the system to serve its safety function autonomously
2Reliability
If a safety shut-off mechanism is added to the pressure reducer, then under-pressure safety is improved, but the manufacturing cost increases
Solution Approach 1:
The safety mechanism is integrated with existing components rather than being implemented as a separate assembly. The stop is formed as part of the body structure, and the regulation lever serves dual purposes (pressure regulation and safety shut-off), which reduces the number of additional parts needed and lowers manufacturing costs
Solution Approach 2:
The safety mechanism uses simple, inexpensive components such as a spring (elastic means) and a stop feature that can be easily manufactured. These components are designed to be cost-effective while providing reliable safety functionality, avoiding the use of expensive materials or complex mechanisms
3Reliability
If the lever seals the gas intake in the second closure position, then safety shut-off is achieved, but the chamber volume reduces to minimum
Solution Approach 1:
The regulation lever is designed to pivot between multiple positions (first closure position, maximum opening position, and second closure position) based on pressure conditions. This dynamic capability allows the lever to automatically transition to the second closure position when under-pressure is detected, sealing the gas intake and reducing chamber volume to minimum as a safety measure
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 design allows for a simple, low-cost implementation of an under-pressure safety system that effectively shuts off gas flow in case of anomalies, ensuring user safety and easy identification of issues without significant modifications to existing pressure reducers.
Implementation Method 1
elastic means (i.e., a resilient member), such as for example, a spring, for biasing the diaphragm towards the position defining a minimum volume of the chamber
Implementation Method 2
a gas intake flow rate regulation lever cooperating with the finger and pivotally mounted in the chamber between: a first closure position corresponding to a maximum volume of the chamber, in which the lever seals the gas intake
Data Source
AI summary
A gas pressure reducer with a safety function in the case of under-pressure includes a lever having a first portion pivotally mounted on a body about a first axis and adapted to seal the gas intake, and a second portion pivotally mounted on the first portion about a second axis and cooperating with a finger secured to a flexible diaphragm.