Gate Valve Spiral Channels Reduce Transverse Forces
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Solution Overview
Problem
Gate valves in waste heat recovery systems experience high transverse forces, leading to increased wear and pressure loss, which reduces their service life and efficiency.
Innovation Solution
The gate valve design features spiral or scroll-shaped inlet and outlet channels, a rotationally symmetric closing body, and a pressure-balanced mechanism to minimize transverse forces and wear, with a peripheral groove and continuous bore for dynamic operation and reduced pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional straight inlet and outlet channels are used, then the valve structure is simple, but high transverse forces act on the closing body causing increased wear and pressure loss
Solution Approach 1:
The patent applies spiral or scroll-shaped inlet and outlet channels instead of straight channels. This curved geometry guides the fluid flow to approach the closing body tangentially rather than radially, significantly reducing the transverse forces acting on the closing body during valve operation.
2Productivity
If the closing body is subjected to high transverse forces, then the valve can handle high flow rates, but wear between the closing body and valve seat increases reducing service life
Solution Approach 1:
The spiral channel geometry maintains high flow rate capability while redirecting the flow to minimize radial contact forces on the closing body, thereby reducing wear between the closing body and valve seat during operation.
Solution Approach 2:
The patent changes the flow direction parameter from radial to tangential by using spiral channels, which reduces the contact pressure between the closing body and valve seat, extending service life while maintaining productivity.
3Stress or pressure
If high transverse forces act on the closing body, then the valve can control high pressure flows, but pressure loss through the valve increases reducing efficiency
Solution Approach 1:
The spiral channel design optimizes the flow path to reduce turbulence and radial impact forces, thereby minimizing pressure loss while maintaining the capability to control high pressure flows through the valve.
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 extends the service life of the gate valve, reduces pressure loss, and enhances efficiency by minimizing wear and contact pressures between the closing body and its partners, while maintaining corrosion protection and allowing for quick operation.
Implementation Method 1
when the hydraulic connection is opened, a fluid flows substantially tangentially around the periphery of the closing body
Implementation Method 2
The inlet channel and the outlet channel are each formed as a spiral
Implementation Method 3
a continuous bore is formed in the closing body. The continuous bore is hydraulically connected to the inlet channel so that the end faces on each side of the closing body are loaded with a hydraulic pressure of the inlet channel
Data Source
AI summary
Gate valve (1) with a valve casing (4) and a closing body (3) arranged longitudinally movably in the valve casing (4). An inlet channel (5) and an outlet channel (6) are formed in the valve casing (4). The closing body (3) via longitudinal movement cooperates with a valve seat (8) formed in the valve casing (4) and hence opens and closes a hydraulic connection between the inlet channel (5) and the outlet channel (6). The inlet channel (5) and the outlet channel (6) are each formed as a spiral.