Pneumatic Valve Island Control With Single-Bus Position Feedback
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Solution Overview
Problem
Existing pneumatic valve arrangements have a high setup and maintenance effort due to numerous electrical lines required for controlling and monitoring process valves, making assembly and maintenance complex.
Innovation Solution
A pneumatic valve arrangement with a valve island and process valves that utilize a single digital communication interface for signal transmission between the valve island and process valves, reducing complexity and enabling bidirectional communication for enhanced functionality, including auto-tune and leakage detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional separate electrical lines are used for each process valve, then reliable signal transmission is achieved, but device complexity and setup effort increase significantly
Solution Approach 1:
The patent combines multiple separate electrical lines into a single digital communication bus that connects the valve island to all process valves. This single bus carries both power and data signals, eliminating the need for individual wiring for each valve while maintaining reliable communication through digital protocols.
Solution Approach 2:
The digital communication interface serves multiple functions simultaneously: it provides power supply, bidirectional data communication, and signal transmission for both control commands from the valve island to process valves and status feedback from process valves to the valve island.
2Ease of operation
If multiple separate electrical lines are used for each process valve, then individual control is achieved, but assembly and maintenance difficulty increase
Solution Approach 1:
The patent merges all control and feedback connections into a single digital communication bus, transforming the assembly process from connecting multiple individual wires to simply plugging in a single communication cable, thereby dramatically simplifying assembly operations.
3Measurement precision
If traditional sensors are used for position detection, then simple implementation is achieved, but continuous monitoring capability is limited
Solution Approach 1:
The patent implements continuous feedback by having process valves constantly report their position, pressure, and status data through the digital communication bus to the valve island control unit. This enables real-time monitoring and analysis of valve operation for predictive maintenance and process optimization.
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
Significantly reduces setup effort and complexity while enabling advanced functions like auto-tune and leakage detection, improving process safety and efficiency by using a single communication interface and integrating position and pressure sensors for continuous valve position monitoring.
Implementation Method 1
The valve island (12) comprises at least two solenoid valves (14)... the solenoid valves (14) being each set up to open or close a flow path from a pressure source (19) to an associated process valve (16)
Implementation Method 2
Each process valve (16) comprises a position measuring system (36) which is set up to continuously detect an open position of the process valve (16)... The position measuring system (36) is set up to detect the position of the working piston (24)
Implementation Method 3
Each process valve may comprise a pressure sensor which is connected in a signaling manner to the monitoring unit. The pressure sensor in particular measures the pressure in the pressure chamber (26)
Data Source
AI summary
A pneumatic valve arrangement is specified, including a valve island having at least two solenoid valves, and at least two process valves, the process valves each including a working piston which delimits a pressure chamber, the solenoid valves being each set up to open or close a flow path from a pressure source to an associated process valve to apply a working medium on the pressure chamber of the associated process valve to open and/or close the process valve. Each process valve comprises a position measuring system which is set up to continuously detect an open position of the process valve. The valve island includes a control unit which is communicatively connected to the position measuring systems of the at least two process valves via one single digital communication interface arranged on the valve island.