Flow Test Assembly for Fire Sprinkler Systems
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Solution Overview
Problem
Current methods for testing fire sprinkler systems, such as the bucket test, are inefficient and prone to errors due to debris accumulation, water wastage, and safety risks, as they require draining the system twice and can be affected by variations in bucket markings or construction.
Innovation Solution
A flow test assembly with a connector, conduit, pressure gauge, and flow totalizer that includes a filter and sight tube to capture debris, allowing for simultaneous testing of multiple sprinkler heads without draining the system, using flexible components to navigate obstacles and reducing water usage by draining through a hose.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bucket test method is used to test sprinkler systems, then the testing can be performed with simple equipment, but the system must be drained twice causing water wastage and the test results can be affected by bucket marking variations
Solution Approach 1:
The patent replaces the mechanical bucket collection system with a digital flow meter that directly measures water flow through the sprinkler system. The flow meter electronically tracks cumulative flow, eliminating the need for physical buckets and manual volume measurement, thereby reducing water wastage while maintaining testing simplicity
Solution Approach 2:
The patent introduces a flow meter as an intermediary device between the water source and collection point. This intermediary continuously monitors and measures flow in real-time, providing accurate measurements without requiring the system to be drained or using bulky collection containers that waste water
2Ease of manufacture
If the bucket test method is used, then the equipment is simple, but debris can become lodged at the sprinkler head affecting flow and test accuracy
Solution Approach 1:
The flow meter serves as an intermediary measurement device that captures flow data directly from the system without requiring debris collection at the sprinkler head. By measuring flow electronically upstream or in-line, the system avoids the problem of debris lodging in collection buckets while maintaining simple equipment
Solution Approach 2:
The patent extracts the measurement function from the collection container (bucket). Instead of using a bucket to both collect and measure water, the flow meter extracts the measurement capability, allowing the system to ignore debris in the collection process while maintaining accurate flow data
3Productivity
If the bucket test is used to test multiple sprinkler heads, then the testing capacity increases, but the system must be drained repeatedly reducing productivity
Solution Approach 1:
The flow meter enables continuous flow measurement without interrupting the water supply for draining and refilling operations. The device maintains continuous monitoring capability throughout the testing process, allowing multiple sprinkler heads to be tested in sequence without the time-consuming drain-refill cycles required by bucket methods
Solution Approach 2:
The flow meter acts as an intermediary that enables continuous testing operations. By providing real-time flow data without requiring system drainage, it allows testers to move efficiently between multiple sprinkler heads while maintaining uninterrupted water flow and continuous measurement capability
4Reliability
If a filter is added to the flow test assembly, then debris can be captured improving test reliability, but the device complexity increases
Solution Approach 1:
The flow meter serves multiple functions simultaneously: it measures flow rate, provides cumulative flow tracking, and can be positioned to naturally filter or bypass debris. This multi-functionality reduces the need for separate filter components, maintaining reliability while minimizing the increase in device complexity
Data Source
AI summary
A flow test assembly for testing fire sprinkler systems includes a connector configured to attach to a sprinkler head orifice to be tested, a conduit downstream of the connector, a pressure gauge downstream of the conduit, and a flow totalizer downstream of the pressure gauge. Water enters the assembly through the connector to the sprinkler head and flows through the components of the assembly downstream of the connector. The water exits the system through the drainage hose.