Electromagnetic Valve Release Mechanism for Rapid Shutdown
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Solution Overview
Problem
Existing emergency shut-off valves in gas distribution systems rely on mechanical mechanisms that are not instantaneous or automated, posing risks in emergency situations due to reliance on manual operation and lack of rapid fluid flow cutoff.
Innovation Solution
An electromagnetic release mechanism is integrated into the emergency shut-off valve assembly, utilizing an electromagnet with varying magnetic forces to maintain the valve in an open position against a biasing force and rapidly switch to a closed position upon magnetic state change, enabling nearly instantaneous fluid flow cutoff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual operation is used to disengage the locking mechanism, then the valve can be closed, but the response time is delayed and automation is lacking
Solution Approach 1:
The patent replaces the manual mechanical operation with an electromagnetic actuator that uses electrical signals to trigger valve closure. The electromagnetic actuator converts electrical energy into mechanical motion to disengage the locking mechanism and rotate the shaft, enabling automated response without manual intervention and significantly reducing response time.
Solution Approach 2:
The locking mechanism is designed to be disengaged by the electromagnetic actuator before the spring-actuated closure mechanism is fully activated. This preliminary action prepares the system for rapid closure by removing the mechanical constraint first, allowing the spring to immediately drive the closure member to the closed position when triggered.
2Speed
If a spring-actuated mechanism with locking is used, then the valve can be reliably closed, but the closure is not instantaneous
Solution Approach 1:
The patent employs a dynamic two-stage closure mechanism. The first stage uses an electromagnetic actuator for rapid disengagement of the locking mechanism, providing instantaneous initiation of closure. The second stage uses a spring-actuated mechanism to complete the closure with sufficient force. This dynamic combination achieves both instantaneous response and reliable sealing.
Solution Approach 2:
The closure function is segmented into two distinct stages: (1) locking mechanism disengagement by electromagnetic actuator, and (2) closure member engagement by spring force. This segmentation allows each component to optimize its function - the electromagnetic actuator provides speed and automation, while the spring mechanism ensures reliable sealing contact.
3Loss of time
If electromagnetic actuator is added to enable automated shutdown, then response time is reduced, but device complexity increases
Solution Approach 1:
The electromagnetic actuator is designed to perform multiple functions: it disengages the locking mechanism, initiates shaft rotation, and can be integrated with the existing spring mechanism. By making the electromagnetic actuator multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving automated rapid response.
Solution Approach 2:
The electromagnetic actuator is merged with the existing spring-actuated closure mechanism into a unified two-stage system. The electromagnetic actuator and spring mechanism work together in sequence rather than as separate independent systems, reducing overall complexity. The locking mechanism disengagement and closure initiation are combined into a single electromagnetic triggering 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
The solution allows for rapid and automated shutdown of fluid flow, enhancing safety by enabling immediate response to emergencies and simplifying the cutoff process, while maintaining a compact and simple operation mechanism.
Implementation Method 1
an electromagnet adapted to generate a first magnetic force in a first state and a second magnetic force in a second state
Implementation Method 2
the first magnetic force is greater than the second magnetic force
Data Source
AI summary
An emergency shut-off valve assembly includes a valve having a closure assembly that includes a closure member coupled to an arm that rotates about a shaft. The valve assembly also includes an actuation assembly having a securement member coupled to the shaft; and an electromagnet adapted to generate a first magnetic force in a first state and a second magnetic force in a second state. In the first state, a contact surface of the securement member is in contact with and magnetically coupled to a contact surface of the electromagnet such that the closure member, the arm, and the shaft are maintained in the first open position against a rotational force provided by a biasing member. In the second state, the closure member, the arm, and the shaft are rotated into the second closed position by the rotational force provided by the biasing member.