Check Valve Reducing Pressure Loss via Casing Flow Path
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Solution Overview
Problem
Existing check valve designs require complex manufacturing processes to form axial flow paths and align valve elements, leading to increased pressure loss and manufacturing complexity.
Innovation Solution
A check valve design featuring a valve housing with a communicating hole and a sealing portion on its outer surface, which positions the valve housing radially within the casing, simplifying the structure and reducing pressure loss by forming the axial flow path between the casing and valve housing, and using a protruded portion with tapered ends to secure the valve housing in both radial and axial directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a flow path is formed between the valve element supporting part and the casing to reduce pressure loss, then pressure loss is reduced, but the manufacturing process becomes complicated requiring grooves and precise alignment
Solution Approach 1:
The sealing portion is integrated directly into the outer surface of the valve housing, combining the sealing function and positioning function into a single structural feature. This eliminates the need for separate sealing members and complex groove formations, while still achieving the axial flow path between the valve housing and casing.
Solution Approach 2:
The sealing portion serves multiple functions simultaneously: it seals the casing flow path, positions the valve housing in the radial direction, and maintains the axial flow path. This multi-functional design simplifies the overall structure and manufacturing process while achieving the desired fluid flow characteristics.
2Reliability
If additional sealing members are added to seal the casing flow path, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The sealing function is merged into the valve housing structure itself through the sealing portion formed on its outer surface. This eliminates the need for separate sealing members such as O-rings or gaskets, reducing the number of components while maintaining sealing reliability through the integrated design.
Solution Approach 2:
The valve housing itself provides the sealing function through its own structural feature (the sealing portion), rather than requiring external sealing components. The sealing portion is self-forming and self-positioning, eliminating the need for additional sealing members and simplifying the overall device structure.
Data Source
AI summary
In order to reduce a pressure loss in a check valve and simplify a manufacturing process, a check valve (10) configured to be disposed in piping of fluid is provided, which includes a valve housing (31) including a valve element (52) and a valve seat (54) therein, a casing (20) that is configured to place the valve housing therein, in which a casing flow path (60) is provided between the casing and the valve housing to make a flow of the fluid in an axial direction of the valve housing. In the valve housing, a communicating hole (38) and sealing portion (34) are formed. The communicating hole that is formed through the valve housing in a thickness direction thereof introduces the fluid, which flows through between the valve element and the valve seat at the open position of the check valve, into the casing flow path. The sealing portion that is provided on an outer surface of the valve housing upstream of the communicating hole in a flow direction of the fluid in the casing flow path, is configured to come into contact with an inner surface of the casing to seal the casing flow path and position the valve housing in a radial direction perpendicular to the axial direction relative to the casing.