Four-Way Valve Blade Structure for Low Pressure Drop Sealing
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Solution Overview
Problem
Existing four-way valves experience significant pressure drop due to the perforations in the spherical valve body, are expensive and heavy, and require regular maintenance of rubber sealings which degrade at high temperatures.
Innovation Solution
A four-way valve design featuring a cylindrical central bore with a valve blade extending along the axial direction, incorporating two round-shaped sealing discs that seal the central bore, and eliminating the need for rubber sealings by ensuring a clearance between the valve blade and housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spherical valve body with perforations is used, then the valve can achieve flow connection between conduits, but the pressure drop across the valve becomes large
Solution Approach 1:
The spherical valve body is segmented into multiple functional elements: a valve blade with specific arc-shaped edges and round-shaped sealing discs. This segmentation allows the flow path to be divided into multiple channels around the valve blade, increasing the total flow area and reducing pressure drop while maintaining effective flow connection between conduits.
Solution Approach 2:
The invention introduces a new geometric dimension by using arc-shaped edges with central angles between 30° and 90° on the valve blade. This angular geometry creates multiple flow paths in different directions, effectively increasing the flow capacity and reducing pressure drop compared to traditional spherical designs.
2Ease of operation
If a spherical valve body is used, then the valve can connect conduits, but the valve becomes heavy and expensive
Solution Approach 1:
The valve body is segmented into a hollow spherical shell with internal components (valve blade and sealing discs) rather than a solid sphere. This segmentation reduces weight significantly while maintaining the structural integrity and flow connection capabilities of the spherical design.
Solution Approach 2:
The spherical valve body is designed with hollow internal structure and strategically placed internal components rather than uniform solid material distribution. This local quality optimization reduces overall weight while concentrating material where it is most needed for structural support and flow control functions.
3Reliability
If rubber sealings are used in the valve, then sealing can be achieved, but the valve cannot withstand high temperatures and requires regular maintenance
Solution Approach 1:
The rubber sealings are completely extracted and removed from the valve design. Instead of relying on elastomeric seals, the invention uses metal-to-metal sealing surfaces with round-shaped sealing discs and arc-shaped valve blade edges that create sealing through precise geometric contact, eliminating temperature limitations associated with rubber materials.
Solution Approach 2:
The sealing mechanism is replaced from elastic deformation-based rubber seals to rigid geometric contact-based sealing. The round-shaped sealing discs and arc-shaped valve blade edges create sealing through precise mechanical contact and surface geometry, providing high-temperature resistance and eliminating the need for rubber components.
Data Source
AI summary
Four-way valve provided with a housing with a central bore and four connections for conduits or the like communicating with the central bore and with a valve body rotatably arranged within the central bore. The central bore is cylindrical, and the connections are in communication with a cylinder jacket of the central bore. The valve body includes a valve blade extending along the axial direction of the central bore and two round-shaped sealing discs provided at the edges of the valve blade extending in the radial direction of the central bore, all this such that these round-shaped sealing discs seal the central bore. In a transverse section of the valve blade, the edges, extending in the axial direction, are formed as circular arcs with a central angle between 30° and 90°.