Fire Pump Control Device for Autonomous Cavitation Prevention
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Solution Overview
Problem
Conventional pump devices, especially portable fire pumps, require constant operator presence to monitor and manage pump operating variables, risking cavitation and fuel level issues, leading to potential damage and reduced performance.
Innovation Solution
A pump device equipped with a control device that autonomously regulates and monitors pump operating variables, including outlet pressure, inlet pressure, and fuel level, using sensors and a status display to prevent faults and alert operators of critical conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an operator continuously monitors pump operating variables using analog gauges or display, then the operator can detect critical conditions, but the operator must remain on site which increases operational complexity and reduces automation
Solution Approach 1:
The patent implements automatic feedback control by connecting sensors that monitor pump operating variables (pressure, temperature, cavitation) to a control unit. When critical conditions are detected, the system automatically generates feedback signals to adjust pump operation or alert operators, eliminating the need for continuous manual monitoring while maintaining reliable detection of critical conditions.
Solution Approach 2:
The pump system performs self-monitoring and self-correction through integrated sensors and control logic. The system automatically detects critical conditions such as cavitation, overheating, and pressure anomalies, and takes corrective actions without operator intervention, making the system serve itself rather than requiring constant human attention.
2Productivity
If the pump operates at high delivery rate to improve productivity, then water transport efficiency increases, but the risk of cavitation increases which can damage the pump
Solution Approach 1:
The control unit continuously receives feedback from sensors monitoring pump operating conditions including pressure differentials and flow rates. When the system detects conditions approaching cavitation thresholds, it automatically adjusts the delivery rate to prevent cavitation while maintaining optimal productivity within safe operating parameters.
Solution Approach 2:
The system performs preliminary monitoring of operating conditions to predict cavitation risk before it occurs. By detecting early signs of cavitation through pressure and flow sensors, the system takes preventive action by adjusting operating parameters before actual cavitation damage can occur to the impeller or pump components.
3Ease of operation
If manual monitoring of fuel tank fill level is used, then the system is simple, but the operator must check fuel levels which increases operational effort and time consumption
Solution Approach 1:
The fuel management system performs self-monitoring through integrated level sensors in the fuel tank. The system automatically tracks fuel consumption, monitors remaining levels, and can even predict refueling needs based on operating patterns, completely eliminating the need for operators to manually check fuel levels and freeing up operational time.
4Extent of automation
If autonomous control with multiple sensors is implemented, then the system can automatically regulate pump operating variables, but the device complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes data from various sensors (pressure, temperature, flow, fuel level), regulates pump operating variables, prevents cavitation, monitors system health, and generates alerts. By making the control unit universal and multi-functional, the patent reduces overall system complexity despite implementing autonomous control with multiple sensors.
Data Source
Figure 1
AI summary
A pumping device is proposed, comprising a pump (12), in particular a fire pump, which draws in water via a suction side (15) and discharges it via a pressure side (16) during operation, and comprising a control direction (19) for controlling pump operating parameters of the pump (12) as a function of a setpoint output pressure at the pressure side (16) of the pump (12) adjustable by the operator, wherein one of the pump operating parameters is an output pressure at the pressure side of the pump (12), and comprising a monitoring device (20) coupled to the control device (19) for monitoring pump operating states that can be characterized by means of the pump operating parameters, such that in the event of a disturbance of a pump operating state, feedback to the control device (19) can be initiated and thereby a change in the associated pump operating parameter can be caused.