Control butterfly valve device for an anti-smoke differential pressure unit and method for controlling a control butterfly valve device
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Solution Overview
Problem
Existing control flap devices for smoke protection differential pressure systems are error-prone and require complex designs, which increase production effort and reduce safety.
Innovation Solution
A control flap device with at least one control flap pivotably mounted in a housing, coupled to first and second restoring devices that counteract opening by applying restoring forces, with a decoupling mechanism that reduces overall closing torque by decoupling the first restoring device at a predetermined opening angle, allowing for adjustable springs and a simple design that enhances safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex joint piece design is used to maintain closing torque, then the device structure becomes more complex, but production effort increases and safety is reduced
Solution Approach 1:
The restoring device is divided into two separate restoring devices (first and second), where the first restoring device can be decoupled at a predetermined opening angle while the second remains coupled. This segmentation allows the system to simplify the joint piece design and reduce production effort while maintaining safety through the coordinated action of both restoring devices.
2Device complexity
If the closing torque is reduced by decoupling the first restoring device, then the device complexity is reduced, but the closing capability may be compromised
Solution Approach 1:
The system dynamically adjusts the closing torque by decoupling the first restoring device when the predetermined opening angle is exceeded. This dynamic adjustment reduces the overall closing torque applied, simplifying the joint piece design while the second restoring device continues to provide necessary closing capability throughout the entire pivoting range.
3Reliability
If adjustable springs are used to apply restoring force, then the restoring force can be varied to increase safety, but the device complexity increases
Solution Approach 1:
The restoring force is made adjustable by configuring the first and second springs with variable parameters (such as spring constant or pre-load). This allows the restoring forces to be optimized for different operating conditions and safety requirements. The adjustability is achieved through simple spring selection and positioning rather than complex adjustment mechanisms, thereby increasing safety while minimizing added complexity.
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 ensures high safety with reduced production effort by simplifying the design, allowing for adjustable restoring forces and safe operation across the control flap's pivoting range, including the maximum open position, while maintaining effective closure and opening functionality.
Implementation Method 1
The first restoring device preferably comprises at least one first spring and/or the second restoring device comprises at least one second spring in order to apply the restoring force
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The device comprises a housing (110), several control valves pivotally mounted about rotational axis, and the reset devices (190,200) coupled to the valves. The restoring forces from the reset devices are applied to a predetermined control valve, such that the opening pressure acting on the control valve counteracts with the restoring forces. A decoupling device is provided to decouple the reset device (190) as soon as the control valves are opened by a predetermined opening angle. An independent claim is included for method for controlling control valve device of smoke protection differential pressure system.