Gas Shutter Status Detection Using Differential Pneumatic Signalling

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Solution Overview

Problem

Existing gas flow control systems require mechanical connections for remote status detection, which are costly, require customization, and are prone to environmental damage and imprecision due to mechanical limitations and sensitivity issues.

Innovation Solution

A pneumatic detecting and signalling system using a differential pneumatic device with electric switches that detects pressure differences to remotely signal the open or closed state of gas regulating devices, eliminating the need for mechanical connections and allowing for direct comparison of controlled parameters and effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If mechanical connections (rods, brackets, plates) are used to connect the switch to the control element, then the switch can detect the position of the shutter, but the system requires customization for each specific situation and increases device complexity

Engineering Contradiction:

Improvedetection of shutter positionVSAvoidcustomization of mechanical connection

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical connection system (rods, brackets, plates) with a magnetic field-based detection system. The magnetic detector senses the position of the shutter through magnetic field interactions without requiring physical mechanical connections, thereby eliminating the need for customization of mechanical linkages while maintaining accurate position detection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a magnetic field as an intermediary between the shutter and the detector. Instead of direct mechanical contact, the magnetic field serves as the medium that transmits position information from the shutter to the magnetic detector, eliminating the need for customized mechanical connection structures.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If mechanical connections are used for remote detection, then the shutter position can be detected, but the system is exposed to environmental conditions (condensate, rusting) and requires stricter safety regulations

Engineering Contradiction:

Improveshutter status detectionVSAvoidenvironmental exposure to condensate and rusting

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces mechanical detectors that would be exposed to harsh environmental conditions with magnetic detectors that can be positioned remotely or protected from direct environmental exposure. The magnetic field penetrates through non-magnetic materials, allowing detection without direct exposure to condensate and rusting conditions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic field acts as an intermediary that can transmit detection signals through protective barriers or non-magnetic enclosures, allowing the detector to remain protected from environmental harshness while still accurately detecting shutter position.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of information

If electrical switches are rigidly connected to the control element, then the control element can be monitored, but the assembly must comply with stricter safety regulations

Engineering Contradiction:

Improvemonitoring of control element statusVSAvoidsafety regulation compliance

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The patent replaces rigid mechanical and electrical connections with magnetic field-based detection. This separation eliminates the need for the control element assembly to be classified as a certified assembly under strict safety regulations, while still providing reliable monitoring of the control element status.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical 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

Enables remote detection of control element malfunctions, reduces customization needs, and withstands environmental conditions without specific electrical connections, providing precise and cost-effective status monitoring.

Implementation Method 1

a magnetic detector, designed to detect the position of the shutter

Methodology Applied

Scientific EffectMagnetic field detection: Magnetic Field

Implementation Method 2

A pneumatic detecting and signalling system using a differential pneumatic device with electric switches that detects pressure differences

Methodology Applied

Scientific EffectPressure difference detection: Pressure Gradient

Data Source

PatentEP3408569B1Unit with detecting and signalling system

Publication Date: 2021.04.28 EMERSON PROCESS MANAGEMENT SRL

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AI summary

Described is a system for remotely detecting and signalling the open and/or closed state of the shutter (O) of an element (3) for controlling the flow of gas along a gas distribution line (2), comprising an electric switch (17; 18) configured to generate an electrical signal representing at least one of the open and closed states.