Flexible Check Valve Blocking Portion Resists Reverse Flow

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Solution Overview

Problem

Existing control valve check structures fail to effectively prevent backflow of water due to deformation under high water pressure, leading to leakage and compromised water quality.

Innovation Solution

A check structure for a control valve base featuring a valve body with annular flanges, seat bodies, and flexible check members with blocking portions that deform to allow forward flow while resisting reverse flow, utilizing a step portion for support and an oblique side portion to prevent lateral impact, enhancing the check effect.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the outlet has two side bodies obliquely narrowed forward to achieve check effect, then the check structure can block water flow, but when reverse water pressure exceeds the bearing capacity, the side bodies deform and fail to block water

Engineering Contradiction:

Improvecheck effect reliabilityVSAvoidside bodies bearing capacity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The check member is divided into multiple functional portions: a blocking portion with base portion and side portion, and an engaging portion. The blocking portion is received in a passage with a step portion that provides support, separating the blocking function from the supporting function, allowing the side bodies to maintain structural integrity while achieving effective blocking.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The step portion is provided in advance within the passage to support the base portion of the blocking portion before reverse water pressure acts on it. This pre-positioned support structure prevents deformation of the side portions under high reverse pressure, cushioning against the potential failure mode.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If the blocking portion is made flexible to allow deformation under reverse pressure, then the check structure can adapt to pressure changes, but the deformation causes the outlet to open and fail to block water

Engineering Contradiction:

Improvepressure adaptationVSAvoidwater blocking capability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Different portions of the check member have different properties: the base portion is flexible to adapt to pressure changes and maintain sealing contact, while the side portion is structured to engage with the passage wall for blocking. This local differentiation allows the check member to both adapt to pressure and reliably block water.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The step portion acts as an intermediary support structure between the blocking portion and the passage wall. It provides a fixed reference point that mediates between the flexible base portion and the rigid passage, enabling the flexible portion to deform without causing the blocking function to fail.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If the side portion is obliquely connected to the base portion to prevent lateral impact, then the structure can resist reverse water pressure, but the complex geometry increases manufacturing difficulty

Engineering Contradiction:

Improvereverse pressure resistanceVSAvoidcheck member fabrication

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The side portion is obliquely connected to the base portion, creating an asymmetric geometry that naturally resists lateral impact from reverse water pressure. The oblique angle provides mechanical advantage in resisting reverse flow while maintaining manufacturability through standard forming processes.

Inventive Principle:

Principle #4Asymmetry

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

Effectively prevents reverse water flow and leakage by providing robust support against water pressure and foreign particles, ensuring reliable water mixing and quality.

Implementation Method 1

the blocking portion is impacted by the water flow and deforms, the base portion abuts against the step portion, and the side portion abuts against the wall of the first passage so as to block the first passage from communicating with the second passage

Methodology Applied

Scientific EffectDeformation: Deformation

Implementation Method 2

the blocking portion has a base portion and a side portion, the side portion is obliquely connected to the base portion... when a water flow flows from the first face toward the second face, the blocking portion is impacted by the water flow and further has a gap between the blocking portion and a wall of the first passage

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS10174851B2Check structure of a control valve base

Publication Date: 2019.01.08 YANG TSAI CHEN

AI summary

A check structure of a control valve base is provided, including a valve body, two seat bodies and two check members. Each seat body is assembled to the valve body, each check member is received in the seat body, each check member includes a blocking portion which is flexible, the blocking portion has a base portion and a side portion, and the side portion is obliquely connected to the base portion. When a water flow flows forward, the blocking portion and the seat body have a gap therebetween for the water flow to pass therethrough; and when the water flow flows reversely, the blocking portion contact the seat body tightly to block the water flow from flowing reversely.