Gate Valve Flow-Channel Switching for Precise Vacuum Sealing
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Solution Overview
Problem
Traditional vacuum valves face accuracy issues due to uncontrolled fluid pressure, leading to inadequate sealing and airproof performance.
Innovation Solution
A gate valve design incorporating a valve base with piston units and flow channel switches, where fluid pressure is controlled through a network of flow channels and switches to accurately drive the valve door, ensuring precise operation and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If fluid pressure is used to drive the valve stem to move the valve plate, then the valve operation is automated, but the operation accuracy deteriorates when fluid pressure is not well controlled
Solution Approach 1:
The valve stem is divided into two separate components: a first valve stem that drives the valve plate parallel to the valve port, and a second valve stem that drives the valve plate towards the valve port vertically. This segmentation allows independent control of each movement phase, improving positioning accuracy while maintaining automated fluid-driven operation.
Solution Approach 2:
A transmission base is introduced as an intermediary mechanism between the pistons and the valve stem. The transmission base converts the linear motion of the pistons into precise valve stem movement, acting as a mediator that enhances control accuracy and decouples the direct relationship between fluid pressure and valve plate positioning.
2Speed
If the valve stem drives the valve plate simultaneously in multiple directions, then the operation speed is improved, but the sealing accuracy deteriorates
Solution Approach 1:
The valve operation is segmented into two sequential phases: first, the valve plate moves parallel to the valve port to open or close the flow path; second, the valve plate moves towards the valve port to ensure sealing. This segmentation maintains high speed operation while ensuring accurate sealing by separating the speed-critical phase from the precision-critical phase.
Solution Approach 2:
The valve plate is first positioned parallel to the valve port (preliminary action) before being driven towards the valve port for sealing. This preliminary positioning ensures that the sealing surfaces are properly aligned before the final sealing movement, thereby maintaining both speed and sealing accuracy.
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
Enhances operational accuracy and airproof performance by reliably controlling the valve door's movement, ensuring effective sealing and opening of the valve port.
Implementation Method 1
the first piston is driven by the fluid entering the first chamber to move towards the valve port along the axial direction of the first piston trough
Implementation Method 2
the first piston is driven by the fluid entering the second chamber to move away from the valve port along the axial direction of the first piston trough
Implementation Method 3
the second piston is driven by the fluid entering the third chamber to push the transmission base through the second piston shaft away from the first piston shaft along the axial direction of the second piston trough
Implementation Method 4
the second piston is driven by the fluid entering the fourth chamber to pull the transmission base through the second piston shaft towards the first piston shaft along the axial direction of the second piston trough
Data Source
AI summary
A gate valve includes a valve base, a first piston unit disposed in the valve base and driven by a fluid to move the valve door between a first position where the valve port is opened and a second position where the valve port is covered, a second piston unit disposed in the valve base and driven by the fluid to move the valve door between the second position and a third position where the valve port is sealed, and a valve door fitted to a valve port of the valve base. At least one flow channel switch is disposed in the valve base. When the flow channel switch is turned on, the fluid is allowed to pass through, such that the second piston unit drives accurately the valve door to seal the valve port, thereby achieving purposes of enhancing accuracy in operation and ensuing airproof performance.