Pressure-Energized Gate Valve Seat Assembly for High-Pressure Sealing
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Solution Overview
Problem
Gate valves in industrial piping systems face issues with clogging due to suspended solids in fluids, leading to restricted flow or failure to block fluid flow effectively. Additionally, traditional valve seal arrangements require frequent greasing during operations like fracking, resulting in significant operational time and costs.
Innovation Solution
The proposed gate valve design incorporates a pressure-energized seat and seal assembly with a plurality of slots integrated into the seat. This design includes a valve body with a gate cavity intersecting a channel, with proximal and distal seats and seals that utilize a continuous slot design for efficient pressure transfer and seal activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gate valve seats and seals are used, then the structure is simpler, but the seal performance deteriorates under high-pressure conditions and requires frequent maintenance
Solution Approach 1:
The patent applies hydraulic pressure to energize the seal assembly. Pressure ports are provided in the seat that communicate with the sealing surfaces, allowing fluid pressure to be directed behind the seal to enhance sealing force. This hydraulic pressure activation enables the seal to maintain effective contact under high-pressure conditions without requiring overly complex mechanical spring or actuator systems.
Solution Approach 2:
The seal assembly is divided into distinct functional components including a seal member, a seat with integrated pressure ports, and a seal chamber. This segmentation allows each component to be optimized independently - the seal member for flexibility and sealing contact, the seat for pressure distribution, and the chamber for pressure containment - thereby achieving reliable sealing without excessive overall complexity.
2Duration of action of stationary object
If conventional seal arrangements are used, then the manufacturing process is simpler, but maintenance frequency increases during fracking operations
Solution Approach 1:
The seal assembly is designed to be self-energizing through the hydraulic pressure system. Fluid pressure automatically activates the seal mechanism without requiring external actuators, springs, or manual adjustment. The pressure ports in the seat direct fluid pressure behind the seal member, causing it to automatically engage and maintain sealing contact. This self-service mechanism eliminates the need for frequent manual greasing and maintenance during fracking operations.
3Productivity
If solid particles are allowed to enter the gate cavity, then flow passage is maintained, but the gate movement becomes restricted due to particle accumulation
Solution Approach 1:
The patent extracts or removes solid particles from the gate cavity environment through strategically positioned pressure ports and drainage pathways. These ports allow fluid pressure to act on the gate and seal surfaces while enabling accumulated particulate matter to be flushed out through dedicated drainage paths, preventing particle buildup that would restrict gate movement while maintaining open flow passage.
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
The integrated slot design enhances the operational efficiency of the gate valve by reducing manufacturing complexity, increasing durability, and improving seal performance. It allows for rapid and uniform seal activation, minimizing leaks and maintaining system integrity under high-pressure conditions, while also reducing maintenance and operational costs.
Implementation Method 1
pressure-energized gate valve seat and seal assembly
Implementation Method 2
pressure energized seat and seal assembly
Data Source
AI summary
A gate valve body having a gate cavity intersecting a channel having a proximal channel portion and a distal channel portion on opposing sides of the gate cavity, a gate positioned in the gate cavity and moveable between closed and open positions, the gate having a proximal gate face and a distal gate face extending perpendicular to the channel; a proximal seat between a proximal valve body portion and the gate, the proximal seat having a first proximal seat face adjacent a proximal valve body face and a second proximal seat face adjacent the proximal gate face; a proximal annular groove on a radial outer surface of the proximal seat; a proximal axial seal positioned in the proximal annular groove contacting with the proximal seat and the valve body; and a proximal plurality of slots extending through the proximal seat between the proximal channel portion and the proximal annular groove.