Silent Check Valve With Rotating Flow Blocking Boards
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional check valves suffer from water hammer and valve clack impacts due to fast opening and closing, leading to damage and backflow issues, with existing damped check valves having complex structures, high costs, and inefficiencies at varying flow velocities and quantities.
Innovation Solution
A water-hammer proof and silent check valve design featuring a shell, spring, flow guide body, and cowl with rotating flow blocking boards that buffer backflow impacts, reducing energy concentration and preventing backflow, utilizing a simple structure with smooth arc and flat board transitions to minimize normal flow obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve plate closes fast to prevent backflow, then the backflow prevention function is improved, but water hammer and valve clack impact occur causing damage
Solution Approach 1:
The valve plate is divided into multiple segments that can close sequentially rather than as a single unit. This segmentation allows the valve to close faster overall while distributing the impact force across multiple smaller segments, reducing water hammer effects on any single point.
Solution Approach 2:
The valve plate incorporates dynamic damping mechanisms that allow it to close quickly under normal conditions but absorb impact energy during water hammer events. The damping characteristics change dynamically based on the closing speed and impact force.
2Object-affected harmful factors
If mechanical dampers are added to reduce closing speed, then water hammer is reduced, but the damping mechanism becomes huge and complex with increasing flow velocity and quantity
Solution Approach 1:
The valve utilizes the fluid flow itself to provide damping during closing. The valve plate's geometry and the fluid dynamics create automatic damping effects without requiring separate mechanical damper components, especially at higher flow velocities where the fluid's own momentum provides the damping force.
Solution Approach 2:
The valve design changes the damping characteristics through parameter optimization of the valve plate geometry, opening angle, and closing mechanism dimensions. This allows the valve to achieve appropriate damping at different flow rates without complex adjustable mechanisms.
3Object-affected harmful factors
If hydraulic dampers are used to reduce kinetic energy, then valve clack impact is relieved, but the movement of fluid in the valve body becomes complex and design cost increases
Solution Approach 1:
The complex hydraulic damping system is extracted and replaced with a simpler design that uses the valve plate's own geometry and the natural fluid dynamics in the valve body to achieve damping. The unnecessary complex fluid movement paths are removed, keeping only the essential damping function.
4Object-affected harmful factors
If the valve plate closes slowly to avoid water hammer, then water hammer impact is reduced, but backflow occurs causing pump reverse rotation
Solution Approach 1:
The valve closing process is divided into periodic stages: an initial fast closing phase to quickly prevent backflow, followed by a controlled damping phase to reduce impact. This periodic action pattern allows the valve to achieve both backflow prevention and water hammer reduction.
Solution Approach 2:
The valve incorporates dynamic elements that allow it to close quickly initially, then transition to a controlled deceleration phase. The damping characteristics are dynamic, providing strong damping only when needed during the closing process, not throughout the entire operation.
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
Effectively reduces water hammer energy impact, prevents backflow, and maintains a simple, cost-effective design capable of handling varying flow conditions, reducing stress on valve components and preventing pump reverse rotation.
Implementation Method 1
a spring, a flow guide body and a cowl
Implementation Method 2
flow blocking boards which project from the outer surface of the flow guide body and are capable of rotating around flow blocking board installation shafts
Data Source
AI summary
A water-hammer proof and silent check valve comprises a shell (1), a spring (9), a flow guide body (10) and a cowl (11). The flow guide body (10) is provided with flow blocking boards (4, 6) which project from the outer surface of the flow guide body (10) and are capable of rotating around installation shafts (3, 7). A plurality of flow blocking boards are arranged in the flow passage in the axial direction of the valve, so that most part of pressure energy and kinetic energy are undertaken by the flow blocking boards by grading when liquid flows back to the valve, thus ensuring that the water hammer with large energy is divided into multiple water hammers with relatively smaller energy so as to greatly reduce the inner stress of valve bearing parts.