Pressure Sensor Isolation for Pipeline Over-Pressure Spikes
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Solution Overview
Problem
Pressure sensors in pipeline systems, such as fire hydrant systems, are prone to damage from pressure spikes exceeding their maximum operating pressure, leading to repair or replacement needs.
Innovation Solution
An over-pressure protection system that includes a main body housing with an incompressible fluid and a pressure sensor configurable in activated and deactivated modes, featuring a barrier and control system to deactivate the pressure sensor when fluid pressure reaches a predetermined threshold, preventing damage from excessive pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure sensors are used to monitor pipeline pressure, then pressure measurement capability is improved, but the sensors are vulnerable to damage from pressure spikes exceeding maximum operating pressure
Solution Approach 1:
A barrier chamber filled with incompressible fluid acts as an intermediary between the pipeline pressure source and the pressure sensor. The barrier chamber isolates the sensor from direct exposure to pressure spikes while still transmitting pressure information through the fluid medium, thereby protecting the sensor from damage while maintaining measurement capability.
Solution Approach 2:
The barrier chamber with incompressible fluid provides beforehand cushioning by absorbing and distributing pressure spikes before they reach the sensor. The fluid's incompressibility allows it to transmit pressure changes while the chamber structure cushions against sudden pressure surges, preventing sensor damage in advance.
2Reliability
If a barrier chamber with incompressible fluid is introduced to protect the sensor, then sensor protection is improved, but device complexity increases
Solution Approach 1:
The barrier chamber serves multiple functions simultaneously: it acts as a protective isolation chamber, a pressure transmission medium container, and a cushioning element. This multi-functionality reduces the need for additional separate protective components, thereby limiting the increase in device complexity while maintaining comprehensive sensor protection.
3Reliability
If the pressure sensor is deactivated in over-pressure conditions, then sensor damage is prevented, but pressure monitoring capability is lost during critical events
Solution Approach 1:
The system uses feedback from the barrier chamber's pressure state to control sensor activation. When the barrier chamber detects normal pressure conditions, the sensor remains active for monitoring. When over-pressure conditions are detected through the barrier chamber's response, the sensor is deactivated to prevent damage, creating a feedback-based protection mechanism that balances monitoring needs with sensor safety.
Data Source
AI summary
An over-pressure protection system includes a main body housing defining a main body chamber configured to receive a fluid therein, wherein the main body housing comprises a spring, the main body housing configurable in a collapsed configuration and an expanded configuration; and a pressure sensor configured to measure a fluid pressure of the fluid, the pressure sensor configurable in an activated mode and a deactivated mode; wherein, in the collapsed configuration, the spring biases main body housing inward at an intermediate point of the main body housing such that the main body housing defines a substantially hourglass shape.