Gate Valve Curved Bonnet Reduces Particulate Buildup
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Solution Overview
Problem
Gate valves in the oil and gas industry face issues with particulate matter buildup, leading to restricted fluid flow or failure to prevent flow due to solid particles accumulating inside the valve passageway, and existing solutions do not allow for easy switching between actuation mechanisms without affecting the sealed portion of the valve.
Innovation Solution
A gate valve system with a bonnet design featuring a curved surface to mate with the gate's radius perimeter, an actuation mechanism connected through a thru-hole in the bonnet, and interchangeable actuation mechanisms that do not compromise the sealed portion, reducing particulate buildup and allowing for easy actuation method changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional gate valve design with straight edges is used, then manufacturing is simpler, but particulate matter accumulates in corners and crevices causing flow restriction
Solution Approach 1:
The gate is designed with rounded edges and curved surfaces instead of sharp corners, creating a smooth contour that prevents particulate matter from accumulating in crevices. The bonnet cavity also features curved surfaces that guide particles away from accumulation zones, eliminating the harmful effect of particulate buildup while maintaining manufacturability through standard machining processes.
2Device complexity
If actuation mechanisms are integrated inside the sealed portion of the valve, then actuation is more compact, but switching between actuation methods requires disassembling the sealed portion
Solution Approach 1:
The valve is divided into a sealed portion (valve body with gate and seats) and a non-sealed actuation portion (bonnet cavity). The actuation mechanism is housed in the bonnet cavity, which is connected to the valve body through a removable interface. This segmentation allows the actuation mechanism to be easily removed and replaced without affecting the sealed portion, enabling versatile switching between different actuation methods while maintaining a compact design.
3Reliability
If the gate travels the full distance between open and closed positions, then flow control is complete, but particulate matter blocks the gate passage preventing full travel
Solution Approach 1:
The rounded edges on the gate and curved surfaces in the bonnet cavity create clearance paths that prevent particulate matter from blocking the gate's full travel distance. The smooth contours guide particles away from the gate passage, allowing the gate to move completely between open and closed positions without obstruction, thereby maintaining both reliable flow control and ease of operation.
Data Source
AI summary
A gate valve system for controlling fluid flow having a valve body with a bore through which fluid can flow. The system includes a valve body having a bore to allow fluid to pass through the valve body and further having a cavity defined by substantially parallel innerside walls of the valve body, a gate wherein at least one end of the gate is defined by a radius perimeter. The system also has a bonnet that is removably coupled to a face of the valve body, wherein a portion of an innerside of the bonnet includes a curved surface adapted to mate with the at least one end of the gate defined by the radius perimeter, and an actuation mechanism operationally positioned and removably connected to the gate by way of a thru-hole in the bonnet.