Pressure Reduction Valve With Auxiliary Passage for Timely Closure

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Solution Overview

Problem

In existing pressure reduction valves, sudden increases in pressure on the primary side can delay the closing action of the valve member, leading to secondary pressures exceeding the set pressure.

Innovation Solution

The pressure reduction valve includes a pressure chamber with auxiliary passages that assist gas flow from the pressure chamber to the secondary-side passage section, reducing the likelihood of abrupt pressure increases and ensuring timely valve closure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the pressure reduction valve is open to allow gas flow, then gas can be supplied from primary port to secondary port, but the pressure in the primary-side passage section abruptly increases causing delay in valve member closing action

Engineering Contradiction:

Improvegas flow rateVSAvoidpressure control accuracy

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The gas passage is segmented into multiple sections: primary-side passage section, pressure chamber, valve member passage, and secondary-side passage section. This segmentation allows independent control of pressure in each section, enabling the valve to maintain reliable pressure control while allowing high gas flow rates through the system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pressure chamber acts as an intermediary between the primary-side passage section and the valve member passage. It buffers abrupt pressure increases from the primary side before they reach the valve member, preventing delayed closing action while maintaining high productivity in the overall system.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the valve member closes promptly in response to pressure difference, then secondary pressure can be controlled accurately, but the closing action is delayed when primary pressure abruptly increases

Engineering Contradiction:

Improvepressure control accuracyVSAvoidvalve member closing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The pressure chamber receives and buffers pressure changes from the primary-side passage section before they affect the valve member. This preliminary action of pressure buffering allows the valve member to respond promptly to actual pressure differences at its location, reducing closing time while maintaining accurate pressure control.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The pressure chamber serves as a mediator that isolates the valve member from abrupt primary pressure changes. This intermediary structure eliminates the time delay in valve member closing by preventing pressure shocks from propagating directly to the valve member, thus reducing loss of time while maintaining reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If gas flows freely through the pressure chamber, then productivity is improved, but abrupt pressure increases occur causing secondary pressure to exceed set pressure

Engineering Contradiction:

Improvegas flow rateVSAvoidabrupt pressure increase

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The gas passage is divided into segmented sections with the pressure chamber as a distinct buffer zone. This segmentation allows gas to flow freely through the system for high productivity while the pressure chamber segment absorbs and dampens abrupt pressure increases, preventing harmful pressure spikes that would exceed secondary pressure limits.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pressure chamber provides beforehand cushioning by buffering pressure changes before they propagate through the valve member passage to the secondary port. This prior cushioning effect allows high gas flow rates for improved productivity while preventing abrupt pressure increases from reaching harmful levels at the secondary outlet.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 configuration effectively prevents abrupt pressure increases in the primary-side passage section, allowing the valve member to close appropriately, thus maintaining secondary pressures within the set limits.

Implementation Method 1

The valve member is configured to be constantly urged in a direction away from the valve seat

Methodology Applied

Scientific EffectElastic force: Elasticity

Implementation Method 2

a difference between a pressure in the primary-side passage section and a pressure in the secondary-side passage section

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Data Source

PatentUS12287038B2Pressure reduction valve

Publication Date: 2025.04.29 JTEKT CORP

AI summary

A pressure reduction valve includes a body including a gas passage, a valve seat provided in the gas passage, and a valve member provided on a downstream side of the valve seat in the gas passage. The gas passage includes a primary-side passage section located on an upstream side of the valve member, and a secondary-side passage section located on a downstream side of the valve member. The primary-side passage section includes a pressure chamber, which is a space formed between the valve member and the valve seat. The valve member includes a valve member passage that connects the pressure chamber to the secondary-side passage section, and an auxiliary passage configured to assist gas that flows into the pressure chamber through a clearance between the valve member and the valve seat to flow out to the secondary-side passage section.