Valve Position Restoring Apparatus with Electromagnetic and Manual Control
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Solution Overview
Problem
Existing solutions for open and close apparatuses, such as valves, fail to rapidly return to their original state during power failures and do not allow for manual state changes after power restoration.
Innovation Solution
A position restoring apparatus that includes a gear type speed reducer, elastic components, and an electromagnet system to automatically return the valve to its original position during power failure, and allows manual operation to change the state before power is restored, using a worm gear mechanism for manual control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a position return device is provided for automatic return during power failure, then the valve can return to original state automatically, but the device cannot be manually operated to change state before power restoration
Solution Approach 1:
The position restoring apparatus is designed to perform multiple functions: it can automatically restore the valve to its original position during power failure through the motor and gear mechanism, while also allowing manual operation through the handwheel and worm gear mechanism when power is unavailable. This multi-functionality resolves the contradiction by making the device adaptable to both automatic and manual operation modes.
Solution Approach 2:
The apparatus dynamically switches between automatic and manual operation modes. The motor-driven gear mechanism engages for automatic restoration when power is available, while the worm gear and handwheel mechanism can be manually operated when power fails. This dynamic adaptability allows the system to respond flexibly to different power conditions and operational needs.
2Speed
If the valve returns rapidly to original position during power failure, then emergency response is improved, but manual operation to change state before power on becomes impossible
Solution Approach 1:
The positioning mechanism is segmented into two independent systems: an automatic motor-driven gear mechanism for rapid position restoration during power failure, and a manual worm gear mechanism with handwheel for operational control when power is unavailable. This segmentation allows each subsystem to optimize its function without interfering with the other, resolving the contradiction between rapid automatic return and manual operability.
Solution Approach 2:
The worm gear mechanism serves as an intermediary between the manual handwheel operation and the valve stem. This intermediary mechanism allows manual torque to be transmitted to the valve for state changes before power restoration, while not interfering with the automatic motor-driven rapid return function when power fails.
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 return to the original state of valves during power failures and allows for manual state changes after power restoration, ensuring immediate action and convenience in emergency situations.
Implementation Method 1
an electromagnet for attracting the movable disk
Implementation Method 2
a spring surrounding an upper end of the movable disk and pushing the movable disk back to an initial position
Implementation Method 3
with which changing the original state of opening or closing manually after power failure or power off accidentally and closing and before the power being on again becomes practically feasible
Data Source
AI summary
A position restoring apparatus for an open and close device includes a casing base, a first actuating member, a second actuating member, a first end cover, a second end cover, an output shaft and a motor. The casing base has main member with a hollow seat. The first actuating member has a first disk part with a first block and a first rack at a lateral side of the first block. The second actuating member has a second disk part with a second block and a second rack. The first end cover provides a plurality of first elastic components. The second end cover provides a plurality of second elastic components. The output shaft provides a joining part to mesh with the first and second racks. The motor shaft extends upward a rod part with an electromagnet, a stationary disk member and a movable disk member.