Monolithic Valve Body With Integral Bypass for Easier Opening
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Solution Overview
Problem
High-pressure piping systems with valves face challenges due to unbalanced forces caused by pressure differentials, making it difficult to open valves, and typical bypasses are prone to fabrication defects and leaking, especially in space-limited applications.
Innovation Solution
A valve body with an integral bypass is designed, where the bypass is seamlessly integrated with the primary valve body portion without welds or mechanical connections, allowing for a monolithic casting that reduces friction and enhances manufacturing precision, eliminating the need for flanged connections and their associated issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a bypass is attached to the primary valve body portion, then space and equipment clearance are optimized, but manufacturing complexity and cost increase due to welding or mechanical coupling
Solution Approach 1:
The bypass is merged with the primary valve body portion to form a single integrated casting. The bypass body and primary valve body are formed as one monolithic structure, eliminating the need for separate components, welds, or mechanical connections. This merging resolves the contradiction by achieving compact space utilization while simplifying manufacturing to a single casting operation.
Solution Approach 2:
The valve body is segmented into functional regions (primary valve body and bypass body) that are simultaneously formed as one integrated piece. The segmentation allows independent optimization of each region's function while maintaining manufacturing simplicity through single-piece casting, resolving the conflict between compact integration and manufacturing complexity.
2Ease of manufacture
If welded or mechanically coupled connections are used for the bypass, then the bypass can be attached to the primary valve body, but fabrication defects and leaking risks increase
Solution Approach 1:
The bypass body and primary valve body are merged into a single monolithic casting structure. This eliminates all welds, mechanical connections, and associated joints that could potentially leak. The integration resolves the contradiction by maintaining manufacturing simplicity while dramatically improving reliability through the elimination of connection interfaces.
3Quantity of substance
If a larger valve bore is used, then flow capacity increases, but unbalanced force and friction on the valve member increase, making it difficult to open
Solution Approach 1:
The flow path is segmented into two separate channels: a large primary bore for high flow capacity and a smaller bypass bore for pressure equalization. This segmentation allows the main valve to operate with large bore flow capability while the bypass provides a separate mechanism to reduce unbalanced forces, resolving the contradiction between flow capacity and ease of operation.
Solution Approach 2:
The bypass acts as an intermediary mechanism that facilitates pressure equalization across the valve member. By providing an alternative flow path with a smaller bore, the bypass mediates the pressure differential that would otherwise create excessive unbalanced force on the large-bore valve, making the valve easier to open while maintaining high flow capacity.
Data Source
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AI summary
A valve body with an integral bypass includes a primary valve body portion defining a primary internal surface, the primary internal surface defining a primary bore extending through the primary valve body portion from a primary upstream end to a primary downstream end; and the bypass seamlessly integrated with the primary valve body portion, the bypass defining a bypass internal surface, the bypass internal surface defining a bypass bore, the bypass bore comprising a bypass upstream bore and a bypass downstream bore, the bypass upstream bore extending through the primary upstream end of the primary valve body portion, the bypass downstream bore extending through the primary downstream end of the primary valve body portion, the bypass internal surface seamlessly intersecting the primary internal surface at the primary upstream end and the primary downstream end.