Modular Check Valve Assembly for Easier Handling and Pipe Joining
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Solution Overview
Problem
Existing check valves made of cast iron are difficult to machine due to temperature and impact vulnerabilities, leading to increased component size, handling challenges, and limitations in connecting inlet and outlet pipes using ring or groove joints.
Innovation Solution
A check valve design with a separated cap and opening/closing part allows for separate assembly, featuring a disc assembly supported by guides and bushes for stable operation, increased flow rate, and corrosion prevention through a reinforcement rib.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cap and guide are integrally formed, then the structural strength is improved, but the component size increases and handling becomes difficult
Solution Approach 1:
The valve body is divided into a main body and a separable cap portion, allowing the cap to be removed for maintenance while the main body remains fixed. This segmentation enables easier handling and maintenance without compromising the overall structural integrity of the valve body.
2Ease of manufacture
If the cap and guide are integrally formed, then the manufacturing process is simplified, but the device complexity increases
Solution Approach 1:
The valve body is segmented into a main body and a cap portion that can be separately manufactured and then assembled. This allows each component to be optimized independently for manufacturing while reducing overall device complexity through modular design.
Solution Approach 2:
The guide is positioned within the cap portion, creating a nested structure where the guide fits into the cap's internal space. This nesting arrangement reduces the overall device footprint and simplifies the assembly structure without requiring integral formation.
3Strength
If cast iron is used for the valve body, then the material strength is improved, but machining difficulty increases due to temperature and impact vulnerability
Solution Approach 1:
The valve body is divided into segments that can be manufactured separately using appropriate processes for cast iron, avoiding the need for complex machining of the entire body. The separable cap allows access to internal components without requiring extensive machining of the main valve body.
4Adaptability or versatility
If the inlet and outlet are connected using ring joint or groove joint, then the connection flexibility is improved, but it is difficult to form grooves or protrusions in cast iron valve body
Solution Approach 1:
The valve body is segmented with the cap portion that can be removed, allowing the inlet and outlet connections to be formed on separable components rather than requiring complex grooves or protrusions in the main cast iron body. This enables the use of standard welding or joining methods on the cap and connection ports.
Data Source
AI summary
A check valve is provided between an inflow pipe and a discharge pipe through which fluid is transferred. The check valve includes a body part having an inflow region connected to the inflow pipe so that the fluid flows therein, a retention region in which the fluid supplied therein through the inflow region remains, and a discharge region connected to the discharge pipe so that the fluid of the retention region is discharged to the outside therethrough; and an opening/closing part, which is provided inside the body part so as to have a disc assembly for opening/closing the path of the fluid flowing in through the inflow pipe, a stem for providing the movement path of the disc assembly, and a first guide for supporting one side of the stem.