Gate Valve Button Flat Edge Tilting Damage
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Solution Overview
Problem
High-pressure fluid flow in rotary gate valves can cause limited deflection or tilting of gate buttons, leading to damage of the wear-resistant coating on the valve seat, especially when transitioning from a closed to an open position.
Innovation Solution
The gate buttons are designed with a flat, truncated circular or segment-shaped contacting face, providing enhanced support and reducing the risk of damage by maintaining a substantial flat edge for flow control, and a retaining portion for proper orientation and retention within the valve gate body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gate buttons are supported about part of the periphery during valve opening, then the fluid flow control is achieved, but the limited support causes button deflection or tilting that damages the wear-resistant coating on the valve seat
Solution Approach 1:
The contacting face of the gate button is segmented into two distinct zones: a truncated circular portion that maintains continuous contact with the valve seat for support, and a segment-shaped flow control edge that manages fluid flow. This segmentation allows the button to perform both support and flow control functions simultaneously without compromising coating integrity.
Solution Approach 2:
Different regions of the contacting face are given different geometries to perform different functions. The truncated circular portion provides stable support contact with the valve seat, while the segment-shaped edge provides flow control. This local differentiation ensures that the support function is maintained while enabling fluid flow control.
2Device complexity
If the contacting face of the gate button is of non-truncated circular shape, then the flow control is simplified, but the support distribution causes button tilting and damage to the valve seat coating
Solution Approach 1:
The contacting face is divided into a truncated circular support zone and a segment-shaped flow control zone. This segmentation provides stable support distribution while maintaining flow control capability, preventing button tilting during operation.
Solution Approach 2:
The contacting face employs an asymmetric design where the truncated circular portion provides stable support contact, while the segment-shaped edge creates an asymmetric flow control profile. This asymmetric geometry optimizes both support stability and fluid flow characteristics.
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 modified button design significantly reduces the risk of tilting and damage to the valve seat, enhancing the reliability and service lifetime of the valve by maintaining better support during the transition from closed to open positions.
Implementation Method 1
The buttons are spring biased into engagement with, and so exert a load on, the valve seat
Implementation Method 2
the combination of the fluid flow and the applied fluid pressures... may tend to result in limited deflection or tilting of the buttons... support is enhanced compared to the case where the contacting face is of non-truncated circular shape
Data Source
AI summary
A valve gate button is disclosed comprising a contacting face for sealing a port of a valve seat, wherein the contacting face is flat and has a substantially straight flow control edge. A valve gate is disclosed, comprising the valve gate button. A valve is disclosed comprising the valve gate button or valve gate.