Controller-Actuated Valve for Pressurized Flow Safety
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Solution Overview
Problem
Existing manual processes using pressurized systems, such as pressure washing and abrasive blasting, face risks due to stuck or intentionally locked switches, leading to continuous flow and potential operator errors, necessitating effective control and shut-off mechanisms.
Innovation Solution
A system comprising a valve, controller, pressurized source, hose, and nozzle assembly, where the controller verifies parameters before allowing flow and automatically shuts off the valve when limits are exceeded or the switch is locked, incorporating a solenoid and emergency shut-off for safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a worker uses a switch to control pressurized medium flow, then the desired result (cleaning, painting, etc.) is achieved, but the system becomes vulnerable to stuck switches or operator errors causing continuous flow
Solution Approach 1:
The system incorporates a feedback mechanism where the controller continuously monitors the switch position and flow conditions. When the switch is detected to be stuck or locked in the open position, the controller automatically activates the solenoid to close the valve, interrupting the pressurized medium flow. This closed-loop feedback ensures that operator errors or switch failures are automatically corrected, maintaining system safety while preserving ease of manual operation.
Solution Approach 2:
The system prepares for potential switch failures by pre-positioning the solenoid-valve assembly ready to automatically close the valve. The controller is programmed to detect stuck switches and trigger automatic shutdown before dangerous continuous flow can occur. This proactive cushioning mechanism prevents catastrophic failures by having safety systems already in place and activated when anomalies are detected.
2Ease of operation
If the switch is locked in the open position to maintain continuous flow, then operational convenience is improved, but the risk of uncontrolled pressurized medium flow increases
Solution Approach 1:
The controller continuously monitors switch position and flow conditions through feedback sensors. When the switch is detected to be locked or stuck in the open position, the system automatically activates the solenoid to close the valve, interrupting the pressurized medium flow. This feedback mechanism allows the system to maintain operational convenience through automatic detection and correction of stuck switches, preventing uncontrolled continuous flow while preserving ease of operation.
Solution Approach 2:
The system performs self-service safety functions by automatically detecting stuck switches and activating the solenoid to close the valve without requiring external intervention. The controller monitors its own operation and corrects its own errors, allowing the system to maintain continuous flow capability when needed while automatically preventing harmful uncontrolled flow when anomalies are detected.
3Reliability
If automatic shutdown mechanisms are added to prevent stuck switch errors, then system reliability is improved, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it monitors switch position, detects stuck conditions, controls the solenoid valve, and manages the overall pressurized medium flow. By consolidating these functions into a single multi-functional controller, the system achieves reliable protection against stuck switches without proportionally increasing device complexity. The solenoid valve assembly also serves dual purposes as both a flow control mechanism and a safety shutdown device.
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 effectively controls and shuts off pressurized systems, reducing operator errors and preventing damage by ensuring safe and controlled flow, as demonstrated by limiting the open valve time and resetting the system for subsequent cycles.
Implementation Method 1
a solenoid adapted to close the valve after receiving a signal from the controller
Data Source
AI summary
A system comprising a system comprising a valve; a controller adapted to actuate the valve; a pressurized source connected to the valve; a hose and nozzle assembly connected to the pressurized source through the valve; and a switch connected to the nozzle assembly; wherein a flow from the pressurized source to the nozzle may be interrupted by the valve and by the nozzle.