Pneumatic Measuring Device Control Valve for Nozzle Cleaning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pneumatic position control measuring devices often struggle to effectively clean measuring nozzles and quickly resume measuring processes after a nozzle has closed, with blow-out flows being insufficient to remove stubborn contamination.
Innovation Solution
A control valve is designed to switch between a blow-out position and a venting position, allowing for high-pressure blow-out and rapid pressure reduction, with optional features like a differential pressure control valve and additional compressed air supply for extended cleaning during device inactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compressed air is supplied through the pressure regulator during measuring mode, then the measuring nozzle operates at controlled working pressure, but the blow-out flow is too weak to remove stubborn contamination
Solution Approach 1:
The control valve dynamically switches the supply channel between two pressure sources: the pressure regulator (for measuring mode) and the blow-out channel (for cleaning mode). This dynamic switching allows the system to adapt the compressed air volume flow according to the operational requirement, providing high flow for cleaning and regulated flow for measurement.
Solution Approach 2:
The system changes the pressure parameter by switching between two different supply paths. The blow-out channel provides high-pressure compressed air directly from the inlet side of the pressure regulator, while the measuring mode uses regulated working pressure. This parameter change enables effective removal of contamination while maintaining precise control during measurement.
2Reliability
If the control valve switches to blow-out position to increase compressed air flow, then contamination can be removed, but the measuring process cannot start quickly after nozzle closure
Solution Approach 1:
The invention extracts the pressure reduction function from the passive venting through measuring nozzles and implements it as an active function through the control valve's venting position. The control valve directly connects the downstream supply channel to the venting channel, rapidly extracting excess pressure when the nozzle is blocked, thereby reducing waiting time before the measuring process can resume.
Solution Approach 2:
The venting channel is pre-configured and connected via the control valve, ready to immediately reduce pressure when needed. Instead of waiting for natural pressure dissipation through the blocked nozzle, the system performs preliminary preparation by having the venting path already in place, enabling rapid pressure reduction and quick resumption of measuring operations.
3Adaptability or versatility
If a three-position control valve is used for blow-out and venting positions, then both functions are available, but the device complexity increases
Solution Approach 1:
The control valve is designed with multi-functionality to perform both blow-out and venting operations. By integrating these two functions into a single valve component, the invention reduces overall system complexity compared to using separate valves for each function. The valve's multiple positions (basic, blow-out, and venting) are coordinated to achieve both cleaning and pressure relief objectives without requiring additional independent control elements.
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 solution enables reliable and rapid removal of heavy contamination from measuring nozzles, ensuring quick start-up of the measuring process and maintaining cleanliness during operational breaks.
Implementation Method 1
a control valve that is located in an inlet side upstream of the pressure regulator and an outlet side downstream of the pressure regulator with the supply duct in fluid connection is switched on, the control valve being switchable from a basic position assumed during the measuring mode into a blow-out position releasing the passage of air through the blow-out channel
Implementation Method 2
a pressure regulator that specifies a working pressure during a measuring mode
Implementation Method 3
the control valve, in its venting position, connects the channel section of the supply channel located downstream of the pressure regulator with a venting channel leading to the atmosphere
Data Source
Figure 1
AI summary
The device (1) has a control valve (35) switchable from an engaged normal position during a measuring mode into a purging position for switching into a purging mode. A channel section (26) of a supply channel (13) is provided downstream of a pressure controller (24), where compressed air through a purging channel (36) is supplied into the channel section under by-passing of the pressure controller in the purging mode. The control valve is switchable into a deaeration position enabling pressure relief of the channel section.