Vacuum Valve Layout With External Sub-Valve Seat
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Solution Overview
Problem
Existing vacuum valves with a main valve portion and a sub-valve portion arranged in parallel for stepwise opening and closing of a flow channel are bulky and structurally complex due to the integration of a sub-valve seat inside the main valve disc, leading to increased size and complexity.
Innovation Solution
A vacuum valve design where the sub-valve seat is positioned outside the main valve disc, with a rod-operated mechanism allowing the sub-valve disc to open and close the sub-flow channel independently, reducing the size and complexity by separating the main valve disc from the rod and using a fluid-pressure cylinder for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sub-valve seat is integrated inside the main valve disc, then the sub-valve portion can be arranged in parallel with the main valve portion, but the size of the main valve disc increases and the structure becomes complex
Solution Approach 1:
The invention divides the valve system into two independent parts: the main valve portion with the main valve disc and main valve seat, and the sub-valve portion with the sub-valve disc and sub-valve seat. By separating the sub-valve seat from the main valve disc and positioning it on the housing, the structure is segmented into modular components that can be manufactured and assembled independently, reducing the complexity of the main valve disc while maintaining the parallel arrangement capability.
2Adaptability or versatility
If the sub-valve seat is integrated inside the main valve disc, then the sub-valve portion can be arranged in parallel with the main valve portion, but the overall size of the vacuum valve increases
Solution Approach 1:
The sub-valve seat is extracted from the main valve disc and repositioned on the housing. This extraction eliminates the need for the main valve disc to accommodate the sub-valve seat internally, thereby reducing the size of the main valve disc. The sub-valve portion remains functionally integrated through the rod connection while occupying less space within the main valve disc structure.
3Ease of operation
If the sub-valve disc is accommodated inside the main valve disc, then the sub-flow channel can be formed inside the main valve disc, but the structural complexity and size increase
Solution Approach 1:
The rod serves as an intermediary element that connects the opening-closing operation mechanism to both the sub-valve disc and the main valve disc. By using the rod as a mediator, the sub-valve disc can be positioned outside the main valve disc while still being operable through the same actuation mechanism, thereby simplifying the main valve disc structure while maintaining ease of operation for both valves.
Data Source
AI summary
A vacuum valve includes a main flow channel that connects the first port and the second port, a main valve seat that surrounds the main flow channel, a main valve disc that opens and closes the main flow channel by contacting and separating from the main valve seat, a sub-flow channel that is formed inside the main valve disc, a sub-valve seat that is formed on an outer surface of the main valve disc, a sub-valve disc that opens and closes the sub-flow channel by contacting and separating from the sub-valve seat at a position outside the main valve disc, and a rod that causes the main valve disc and the sub-valve disc to open and close. The sub-valve disc opens and closes the sub-flow channel by being operated directly by the rod, and the main valve disc opens and closes the main flow channel by being operated via the sub-valve disc by the rod.