Abrasive-Resistant Check Valve with Aligned Poppet Sealing
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Solution Overview
Problem
Traditional check valves are unreliable for sealing in abrasive environments, as abrasives can prevent the valve from closing and erode the internal surfaces, leading to performance and life issues.
Innovation Solution
A check valve design featuring an annular seat, a poppet with an annular body and alignment pins, and a support tube with a wiper to prevent abrasive particles from entering the valve's internal spaces, ensuring reliable sealing and reduced erosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional check valves with spring biased sealing elements are used, then the valve can relieve overpressure conditions, but the abrasive particles prevent reliable sealing and erode internal surfaces
Solution Approach 1:
The patent extracts the sealing element (poppet) from direct exposure to abrasive particles by positioning it upstream of the elbow bend where particles settle. The sealing surface is located in a region protected from the harmful abrasive flow, allowing reliable sealing without continuous particle interference that would prevent closure in traditional valve designs.
Solution Approach 2:
The patent introduces an intermediary geometry (elbow bend and internal flow path design) that mediates between the abrasive particle-laden fluid and the sealing surfaces. This geometry causes particles to settle in the lower portion of the valve body away from the sealing interface, protecting the sealing mechanism while still allowing the valve to function in abrasive environments.
2Productivity
If check valves allow high velocity abrasive fluid flow through them, then pressure relief is achieved, but internal surfaces are eroded reducing performance and lifespan
Solution Approach 1:
The patent extracts the vulnerable internal surfaces (sealing surfaces and flow passages) from the direct path of high-velocity abrasive flow. By positioning sealing elements upstream of the elbow bend and designing flow passages that route fluid away from critical surfaces, the valve achieves pressure relief functionality while protecting internal surfaces from erosive wear that would otherwise reduce lifespan.
Solution Approach 2:
The patent applies local quality by creating different flow conditions in different regions of the valve. The upstream region contains the sealing surfaces protected from abrasives, while the downstream region handles the abrasive flow. This localized protection strategy allows the valve to maintain high productivity through effective pressure relief while extending lifespan by protecting critical surfaces in the specific region where sealing occurs.
3Stability of the object's composition
If abrasive particles enter the valve's internal spaces, then the valve structure is compromised, but preventing particle entry requires additional sealing mechanisms
Solution Approach 1:
The patent employs self-service by utilizing the valve's own geometry (elbow bend, internal flow path configuration, and poppet positioning) to prevent abrasive particles from entering internal spaces. The design leverages the natural flow patterns and particle settlement behavior to achieve protection without requiring additional active sealing mechanisms or complex particle rejection systems.
Solution Approach 2:
The patent introduces geometric intermediaries (elbow bends, flow path configurations, and positioning features) that act as passive barriers to particle entry. These geometric features mediate between the abrasive fluid and internal valve spaces, preventing particle contamination while maintaining structural integrity without adding complex active sealing systems.
Data Source
AI summary
A valve includes an inlet, an annular seat, a poppet having an annular body having an inner volume and an annular seat facing surface selectively contactable with the annular seat, and at least one alignment pin extending inwardly of the inner volume of the poppet, an outlet fluidly connectable to the inlet; and an alignment tube disposed between the outlet and the inlet, the alignment tube extending inwardly of the inner volume of the poppet and including an alignment feature thereon configured to at least partially receive the alignment pin therein when the annular seat facing surface of the poppet is retracted from the seat.