Marine Strainer Clogging Indicator Using Flow and RPM Comparison

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Solution Overview

Problem

Traditional strainer maintenance methods, relying on visual observation, are inadequate for detecting blockages in multiple strainer systems, leading to potential equipment damage due to inadequate flow and solids carry-through, especially in marine vessels with numerous components.

Innovation Solution

A system that continuously monitors liquid flow and operating speed through sensors, comparing these measurements to reference data to detect blockages and alert operators before damage occurs, incorporating a central processor and visual/audible indicators to manage strainer clogging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional visual observation methods are used to monitor strainer clogging, then the system is simple and easy to operate, but the detection reliability is insufficient and cannot provide continuous monitoring of multiple strainers

Engineering Contradiction:
Improvedetection reliabilityVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces manual visual inspection with automated electronic sensing systems. Flow sensors and RPM sensors continuously monitor strainer performance parameters, substituting human observation with electronic detection mechanisms that provide reliable, continuous monitoring without requiring physical inspection of each strainer.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system implements continuous feedback by comparing real-time flow rate and RPM data against reference values. When deviations indicate clogging conditions, the system provides immediate feedback to operators through alarms or automated responses, enabling reliable detection and response to strainer blockages across multiple locations simultaneously.

Inventive Principle:
Principle #23Feedback

2Reliability

If multiple dedicated strainers are installed for numerous components, then each component is protected, but the maintenance time and effort increase significantly

Engineering Contradiction:
Improvecomponent protectionVSAvoidmaintenance time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The monitoring system serves multiple strainers simultaneously with a single integrated platform. One central system with multiple sensors can monitor numerous strainers across the vessel, providing universal monitoring capability that reduces the time required to check each individual strainer while maintaining protection for all components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system enables self-monitoring of strainer conditions through automated sensing and comparison against reference data. The continuous automated monitoring eliminates the need for frequent manual inspections, allowing the system to service itself by detecting and reporting clogging conditions without human intervention in the monitoring process.

Inventive Principle:
Principle #25Self-service

3Ease of operation

If visual inspections are performed at recommended intervals, then strainer maintenance is addressed, but the inspections may not be performed timely and equipment damage can occur

Engineering Contradiction:
Improvemaintenance schedulingVSAvoidequipment safety
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The system provides continuous monitoring of strainer conditions through uninterrupted sensing of flow rates and RPM. This continuous action ensures that clogging conditions are detected immediately when they occur, eliminating gaps in monitoring that exist with periodic visual inspections and ensuring equipment safety is maintained at all times.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The system detects clogging conditions in advance before they lead to equipment damage. By continuously monitoring and comparing parameters against reference values, the system provides early warning of developing blockages, allowing preventive action to be taken before solids carry-through or overheating occurs.

Inventive Principle:
Principle #10Preliminary action

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

Instantly alerts operators to strainer blockages, reducing the need for frequent visual inspections and preventing equipment damage by continuously monitoring and comparing flow and speed data across multiple strainers.

Implementation Method 1

a sensor for measuring the rate of liquid flow through a strainer

Methodology Applied
Scientific EffectFlow measurement:

Implementation Method 2

a sensor for measuring the operating speed (RPM) of a device utilizing the liquid from the strainer

Methodology Applied
Scientific EffectRotational speed measurement:

Data Source

PatentUS7491320B2Marine vessel liquid strainer clogging indicator
Publication Date: 2009.02.17 GROSS DONALD P
  • US7491320B2 patent drawing
  • US7491320B2 patent drawing
  • US7491320B2 patent drawing

AI summary

An apparatus and method for estimating blockage within a liquid strainer used in a marine vessel is provided. The apparatus includes a sensor for measuring the rate of liquid flow through the strainer and a sensor for measuring the operational speed of a device utilizing the strained liquid. The apparatus also includes a control panel and central processing unit configured to receive at least one measurement from the flow sensor and receive at least one measurement from the speed sensor. The central processing unit then compares the relationship of the measured liquid flow rate and measured device speed to a predetermined clean strainer reference relationship of liquid flow rate and device speed at an equivalent device speed to determine the degree of strainer blockage. Visible and audible indicators are actuated when blockage becomes excessive.