Pneumatic Valve Drive Using One Regulated Pressure Chamber
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Solution Overview
Problem
Pneumatic valve drives for vacuum valves have complex control technology due to the need to regulate pressure in both cylinder cavities, making them more intricate than necessary.
Innovation Solution
Implementing a pneumatic valve drive with one cylinder cavity under constant pressure and the other under variably regulatable pressure, allowing for piston movement in both directions and stabilization using a single regulated pressure source, with a position-determining arrangement to adjust the pressure based on piston position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pressure is regulated in both cylinder cavities, then the piston can be controlled to move in both directions and be stabilized, but the control technology becomes complex
Solution Approach 1:
The invention extracts the pressure regulation function from one of the two cylinder cavities, leaving it under constant pressure. Only one cylinder cavity is equipped with a regulated pressure source, which simplifies the control system while still enabling bidirectional piston movement and stabilization through force imbalance control.
Solution Approach 2:
The invention changes the pressure parameter in one cylinder cavity from variable to constant, reducing the number of controllable parameters from two to one. This parameter reduction simplifies the control technology while maintaining full operational capability through the regulated pressure source in the other cavity.
2Measurement precision
If a regulated pressure source is used in both cylinder cavities, then precise bidirectional control is achieved, but the device construction becomes more complex
Solution Approach 1:
The invention removes one regulated pressure source from the system, retaining only one regulated pressure source and one constant pressure source. This extraction maintains precise control capability through the single regulated source while significantly reducing device construction complexity.
Solution Approach 2:
The constant pressure source in one cylinder cavity serves as a stable reference that automatically provides counterbalancing force. This self-service approach eliminates the need for active regulation in that cavity, reducing construction complexity while maintaining control precision through the interaction between the regulated and constant pressure sources.
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
Simplifies the construction of pneumatic valve drives by allowing for both directional movement and stabilization of the piston using a single regulated pressure source, reducing complexity and enhancing operational efficiency.
Implementation Method 1
one of the pressure sources is a constant pressure source for impinging the cylinder cavity that is disposed on one of the sides of the piston with a constant pressure
Implementation Method 2
another of the pressure sources is a regulated pressure source for impinging the cylinder cavity that is disposed on the opposite side of the piston with a variably regulatable pressure
Implementation Method 3
If, by means of the regulated pressure source, the pressure in the cylinder cavity on the one side of the piston is set so as to be so high that the forces acting on the piston as a result thereof are larger than the forces that in the opposite cylinder cavity act on the piston
Data Source
AI summary
A pneumatic valve drive (1) for a valve (2), in particular for a vacuum valve, which has at least one pneumatic cylinder (3) with at least one piston (4) that is movably mounted in the pneumatic cylinder (3) and at least two cylinder cavities (5, 6) arranged on opposite sides of the piston (4). Each cylinder cavity (5, 6) is connected to at least one pressure source for applying pressure to each cylinder cavity (5, 6). One of the pressure sources is a constant pressure source (7) for applying a constant pressure to the cylinder cavity (5) arranged on one of the sides of the piston, and one of the other pressure sources is a regulated pressure source (8) for applying a variably regulatable pressure to the cylinder cavity (6) arranged on the opposite side of the piston (4).