Magnetic Shut-Off Latch for Seismic Pipeline Isolation
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Solution Overview
Problem
Existing emergency shut-off devices require electrical power and significant physical force for activation, making them unreliable in emergency situations like earthquakes or fires, where rapid and efficient shutdown of pipelines is crucial without the availability of electricity or trained personnel.
Innovation Solution
A seismic emergency shut-off device utilizing a magnetic driver mechanism with a guide tube and magnets that generates significant force with minimal activation energy, allowing for instantaneous and long-term operation without electricity, springs, or chemicals, and featuring a frictionless latching system for zero energy requirement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If electrical power sources and springs are used in emergency shut-off devices, then the device can generate significant force for shutdown, but the device requires external energy sources and has limited functional life
Solution Approach 1:
The magnetic driver system uses the magnetic field as both the storage medium and the actuation mechanism. The ferromagnetic material stores potential energy in its magnetized state and releases it automatically when needed, making the system self-sufficient without external power sources or springs. This eliminates the need for batteries, capacitors, or mechanical spring assemblies while maintaining the ability to generate significant shutdown force.
Solution Approach 2:
The patent replaces traditional mechanical energy storage mechanisms (springs, flywheels, capacitors) with a magnetic field-based system. The ferromagnetic material's magnetic properties serve as the energy storage and release mechanism, substituting mechanical components with magnetic field interactions. This substitution eliminates friction, wear, and the need for mechanical maintenance while providing instantaneous force generation.
2Reliability
If traditional locking mechanisms are used, then the device can maintain a locked state, but friction and contact wear limit the functional life of the device
Solution Approach 1:
The patent replaces mechanical contact-based locking mechanisms with a magnetic field-based latching system. The ferromagnetic material interacts with magnets through magnetic attraction and repulsion forces, eliminating physical contact between moving parts. This non-contact magnetic latching mechanism removes friction and wear entirely, allowing the device to maintain its locked state indefinitely without degradation from component wear.
Solution Approach 2:
The magnetic field serves as an intermediary between the control mechanism and the locking mechanism. Instead of direct mechanical contact, the magnetic field transmits the locking and latching forces, allowing the system to maintain reliable locking without physical wear. The ferromagnetic material acts as the intermediary that responds to magnetic field changes to achieve the desired locking state.
3Reliability
If significant physical force is required for activation, then the device can ensure secure locking, but the device becomes difficult to activate in emergency situations
Solution Approach 1:
The patent changes the parameter of activation force by using magnetic field interactions instead of mechanical force. The ferromagnetic material's magnetic properties allow it to be actuated by small magnetic fields generated by magnets or electromagnetic coils, reducing the activation force from significant physical effort to minimal magnetic field interaction. This enables easy activation even in emergency situations while maintaining secure locking through the same magnetic mechanisms.
4Reliability
If electrical power sources are used, then the device can function reliably, but the device requires maintenance and has limited operational lifespan
Solution Approach 1:
The magnetic driver system is self-sufficient, using the intrinsic magnetic properties of ferromagnetic materials to store and release energy without external power sources. The system maintains its operational readiness indefinitely as long as the magnetic materials retain their properties, eliminating the need for battery replacement, capacitor recharging, or spring maintenance. This self-service mechanism dramatically extends operational lifespan while maintaining reliability.
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
Enables rapid and reliable emergency shut-off with minimal activation force, maintaining functionality for extended periods without external energy sources, suitable for various applications requiring significant force with high reliability and indefinite readiness.
Implementation Method 1
first and second magnets affixed at a selected position on opposite sides along a length of the guide tube with like poles facing each other, each magnet having a magnetic axis extending between its North and South poles, magnetic axes of first and second magnets being substantially aligned with each other to form a magnetic repulse shift line
Implementation Method 2
the disclosed device utilities frictionless magnetic latching (non-contact) enabling an activation means which reduces the energy requirement of the device to zero
Data Source
AI summary
An emergency shut-off device comprises an activation means configured to generate an activation force in response to detecting a seismic event, and a magnetic driver having a hollow guide tube with two magnets affixed at a selected position on opposite sides along a length of the guide tube with like poles facing each other and a drive piston movable inside the guide tube. The driver piston is coupled to a third magnet and has a first end for receiving an activation force to move the third magnet crossing a magnetic repulse shift line formed by the two magnets, and a second end for applying the drive force to an output system to effectuate a shut-off of a fluid line.