Dovetail Gate Valve Sealing With Tapered Seat Wedges
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Solution Overview
Problem
Existing gate valves lack efficient mechanisms for fluid regulation and sealing, particularly when transitioning between open and closed positions, which can lead to fluid leakage and increased wear on valve components.
Innovation Solution
The gate valve design incorporates two tapered seat wedges with tapered and flat sides, and a dovetail gate positioned between them, allowing for precise fluid sealing and regulation by adjusting the position of the gate within the seat wedges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional gate valve design is used, then the structure is simple, but fluid leakage occurs and wear on valve components increases
Solution Approach 1:
The gate is segmented into multiple components including a dovetail gate and two tapered seat wedges, allowing each component to perform a specific function. The dovetail gate provides the primary sealing surface while the tapered seat wedges provide adjustable sealing pressure and wear compensation, thereby improving fluid sealing without requiring a completely new gate design
Solution Approach 2:
The tapered seat wedges are designed to be adjustable relative to the dovetail gate, allowing dynamic adjustment of the sealing pressure and contact point. This dynamic adjustment mechanism compensates for wear over time and maintains optimal sealing conditions, improving reliability while adding only minimal complexity through the adjustment capability
2Reliability
If the gate is positioned in the closed position, then fluid leakage is reduced, but wear on valve components increases
Solution Approach 1:
The tapered seat wedges are pre-positioned and pre-loaded against the dovetail gate to ensure optimal sealing contact before the valve is fully closed. This preliminary action distributes the sealing pressure more evenly across the sealing surfaces, reducing concentrated wear points and extending valve lifespan while maintaining effective fluid sealing
Solution Approach 2:
The tapered geometry of the seat wedges allows for controlled parameter changes in pressure distribution and contact area as the valve transitions from open to closed position. By adjusting the taper angle and wedge positioning, the sealing pressure is optimized to achieve reliable sealing while minimizing excessive pressure that would accelerate wear, thereby extending valve operational life
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances fluid sealing and reduces wear on valve components by ensuring a precise fit between the tapered seat wedges and the dovetail gate, thereby minimizing fluid leakage and extending the valve's operational lifespan.
Implementation Method 1
The gate includes two tapered seat wedges, the tapered seat wedges have a tapered side and a flat side and a dovetail gate, the dovetail gate positioned between the two tapered seat wedges, the tapered sides of the tapered seat wedges adjacent the dovetail gate
Data Source
AI summary
A gate valve includes a bonnet mated to a body and a stem extending through the bonnet and into the body. The gate valve also includes a seat positioned within the body and a gate, the gate positioned within the body and adapted to form a fluid seal with the seat. The gate includes two tapered seat wedges, the tapered seat wedges have a tapered side and a flat side and a dovetail gate, the dovetail gate positioned between the two tapered seat wedges, the tapered sides of the tapered seat wedges adjacent the dovetail gate.