Diaphragm Valve Inversion Inhibitor for Stable Sealing and Flow Control

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Solution Overview

Problem

Conventional diaphragm-type fluid control valves face challenges in ensuring precise fluid flow and pressure control due to complexity and expense in manufacturing, as well as issues with biasing mechanisms that can cause vibrations and pressure loss.

Innovation Solution

A diaphragm with a simple construction featuring a flexible member with a smooth upper surface and reinforced fabric, which naturally inverts to seal against elongated seat members without the need for ribs or springs, providing a tension force to maintain the sealed position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If ribs or rings are added to the diaphragm to provide biasing force, then the diaphragm can be urged to the seated position, but the manufacturing complexity and expense increase

Engineering Contradiction:

Improvesealing reliabilityVSAvoiddiaphragm structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent removes the complex ribs and rings from the diaphragm structure, extracting only the essential flexible membrane component. The biasing function is achieved through the inverted position geometry rather than additional structural elements, thereby simplifying manufacturing while maintaining sealing reliability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The diaphragm is designed to invert inside-out during operation, with the convex surface becoming concave and vice versa. This inversion mechanism provides the necessary biasing force to urge the diaphragm to the seated position without requiring ribs or rings, resolving the contradiction between reliability and complexity

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If springs or biasing devices are used to urge the diaphragm to the closed position, then the diaphragm can be forced to the valve seat, but vibrations and pressure loss occur

Engineering Contradiction:

Improvevalve closure reliabilityVSAvoidvibrations and pressure loss

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the mechanical spring or biasing device with a geometric inversion mechanism. The diaphragm's inverted position creates the necessary biasing force through its shape change rather than through elastic deformation of a spring, eliminating vibrations and pressure loss while maintaining reliable valve closure

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The diaphragm undergoes a parameter change in its geometric configuration, inverting from a convex-to-concave shape to a concave-to-convex shape. This parameter change provides the biasing force needed for reliable closure without the harmful vibrations and pressure loss associated with traditional spring mechanisms

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If the diaphragm chamber pressure is restored to balance forces, then the valve can remain open, but the diaphragm may not seal properly without additional biasing

Engineering Contradiction:

Improvevalve operation simplicityVSAvoidsealing reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The diaphragm inverts inside-out when forces are balanced, with the inverted geometry providing a natural biasing force that urges the diaphragm to the seated position. This inversion mechanism ensures proper sealing when the diaphragm chamber pressure is restored, maintaining both ease of operation and sealing reliability without requiring additional biasing devices

Inventive Principle:

Principle #13The other way round (Inversion)

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 achieves precise control of fluid flow and pressure with reduced stress concentrations, simplified assembly, and reliable performance, minimizing wear and pressure loss while eliminating the need for additional biasing devices.

Implementation Method 1

a flexible diaphragm element to control fluid flow... the flexible element engages a seat formed within the valve body... Upon release of fluid pressure from the diaphragm chamber, the diaphragm element can be displaced from the seated position

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12259066B2Inversion inhibitor for fluid control valve and methods of fluid control

Publication Date: 2025.03.25 TYCO FIRE PRODUCTS LP

AI summary

A fluid control valve includes a cover portion and a body portion. Inner surfaces of the cover and the body portion define a chamber that includes an inlet and an outlet in communication with the chamber. The cover portion includes a central section and an inversion inhibitor circumscribing the central section. The inversion inhibitor projects into the chamber toward a central axis of the chamber. The fluid control valve also includes a diaphragm disposed between the cover portion and the body portion. The diaphragm has a flexible member that is disposed within the chamber for controlling communication between the inlet and the outlet. The inversion inhibitor prevents the flexible member from reaching its natural-inverted position and creates a force within the flexible member that urges the flexible member to a seated position. In the partially inverted position, the upper surface of the flexible member conforms to at least a portion of the inner surface of the cover portion to define a passageway that permits communication between the inlet and the outlet.