Segmented Multiport Melt Valve for Continuous Flow Switching

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Solution Overview

Problem

Existing multiway valve units for plastic melts and high-viscosity liquids require large installation spaces and complex manufacturing processes, often interrupting fluid flow during changeovers due to the use of circular disk switching elements and cylindrical bolts.

Innovation Solution

A multiway valve unit with a segment-shaped switching element and offset pivot axis, utilizing a hydraulic drive and radially arranged recesses for main and secondary flow passages, which reduces installation space and allows uninterrupted operation by maintaining continuous flow paths during changeovers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a circular disk switching element is used, then reliable switching at high pressures and temperatures is achieved, but large installation space is required

Engineering Contradiction:

Improveswitching reliabilityVSAvoidinstallation space

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The circular disk switching element is segmented into a sector-shaped switching element that can be pivoted between positions. This segmentation allows the valve to achieve the same flow control function with a smaller angular movement (less than 360 degrees), thereby reducing the required installation space while maintaining reliable switching capability at high pressures and temperatures.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The switching element transitions from a symmetric circular disk to an asymmetric sector shape with a pivot axis offset from the center. This asymmetric design enables compact housing geometry and reduces the radial space required, while the offset pivot axis creates a cam action that ensures reliable sealing and switching performance under high pressure conditions.

Inventive Principle:

Principle #4Asymmetry

2Adaptability or versatility

If a circular disk switching element is rotated for changeover, then flow direction is switched, but fluid flow is interrupted causing pressure peaks

Engineering Contradiction:

Improveflow direction controlVSAvoidpressure peaks

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The sector-shaped switching element is designed with flow passages that maintain continuous fluid flow paths during the pivoting transition. The geometry of the switching element ensures that as it rotates between positions, fluid can continuously pass through the valve without complete interruption, thereby preventing pressure peaks while still achieving flow direction control.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The valve design ensures continuous fluid flow through the valve body during switching operations. The sector-shaped switching element is configured so that fluid passages remain open and connected throughout the pivoting motion, maintaining continuous useful action of fluid transport without interruption that would cause harmful pressure peaks in upstream and downstream equipment.

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If a cylindrical bolt with axial movement is used for changeover, then uninterrupted flow is achieved, but manufacturing complexity and postprocessing requirements increase

Engineering Contradiction:

Improveuninterrupted flow operationVSAvoidmanufacturing simplicity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The complex axial movement mechanism of a cylindrical bolt is replaced with a simpler pivoting motion of a sector-shaped switching element. This mechanical substitution maintains the benefit of uninterrupted flow operation while dramatically simplifying the manufacturing process, eliminating the need for precise axial fit tolerances and postprocessing operations required by cylindrical bolt designs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

Instead of moving a cylindrical bolt axially to control flow (linear motion), the invention uses radial pivoting motion of a sector-shaped element. This inversion of the motion type simplifies the mechanical design and manufacturing, as pivoting motions are inherently easier to manufacture and maintain than precise axial sliding fits, while still achieving uninterrupted flow control.

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

The solution enables compact design, simplified production, and uninterrupted fluid transfer between main and secondary flow passages, reducing pressure peaks and installation space requirements while maintaining high sealing efficiency for medium- to high-viscosity fluids.

Implementation Method 1

a linearly acting drive by a hydraulic cylinder

Methodology Applied

Scientific EffectHydraulic force: Hydraulic Press

Data Source

PatentUS12158213B2Multiport valve unit for plastic melts and other medium- to high-viscosity liquids

Publication Date: 2024.12.03 GNEUSS GMBH

AI summary

A multiport valve unit for medium- to high-viscosity fluids having a housing comprising at least: an inlet plate having at least one main flow channel, an outlet plate having at least one main flow channel, and at least one secondary flow channel. At least one intermediate plate and/or at least one spacer element are located between the inlet plate and the outlet plate. The multiport valve unit also has at least one switching element mounted pivotably or rotatably in the housing, which switching element is located between the inlet plate and the outlet plate, and, in a starting position, connects the main flow channels to one another via at least one passage opening.