Pressure Reduction Valve Structure for Clean Flow Sealing

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Solution Overview

Problem

Existing pressure reduction valves are prone to mixing metal powder generated at boundary surfaces into the fluid flow passage due to screw connections, which can contaminate the fluid flow.

Innovation Solution

A pressure reduction valve design that includes a body member with a cap member screwed outside the valve chamber, separating the boundary surface from the valve chamber, and a production method that involves a bottom wall surface-forming member disposed within the internal space and sealed by a cap member to prevent metal powder mixing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If screw structures are used to connect the collar member and pressing member, or the pressing member and body, then the assembly is securely fastened, but metal powder is generated and mixed into the valve chamber

Engineering Contradiction:

Improveconnection strengthVSAvoidmetal powder contamination

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The valve body is divided into two separate connection interfaces: the collar member connects to the pressing member outside the valve chamber, and the pressing member connects to the body also outside the valve chamber. This segmentation isolates the screw connection areas from the fluid passage, preventing metal powder from entering the chamber.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The screw connection structures are extracted and positioned outside the valve chamber boundary. By relocating the connection interfaces away from the fluid passage, the harmful metal powder generation is separated from the clean fluid environment.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the cap member is screwed to the body member at the body opening portion, then the valve chamber is sealed, but the boundary surface between cap member and body member is connected to the valve chamber

Engineering Contradiction:

Improvesealing reliabilityVSAvoidmetal powder mixing into valve chamber

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The pressing member acts as an intermediary component between the cap member and the body. The cap member screws to the pressing member, which in turn connects to the body, creating an intermediate connection zone that is isolated from the valve chamber interior.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The connection interface between the cap member and body is shifted from a direct radial connection at the chamber opening to an axial connection through the pressing member. This dimensional repositioning moves the screw boundary surfaces outside the valve chamber volume.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20250369529A1Pressure reduction valve and production method for pressure reduction valve

Publication Date: 2025.12.04 ASTEMO LTD

AI summary

A pressure reduction valve includes: a body member that has an internal space for accommodating a valve element and has a body opening portion communicating with the internal space; a bottom wall surface-forming member that is accommodated in the internal space, is in contact with an inner wall surface of the body member, and forms a bottom wall surface of a valve chamber in which the valve element is located; and a cap member that is screwed to the body member and closes the body opening portion.