Parallel Cylinder Check Valve with Dual Dampers
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Solution Overview
Problem
Conventional check valves fail to provide a perfect slow closing function while preventing noise, vibration, and water hammer, as they rely on a single shock-absorbing damper, which leads to increased backflow and potential damage to water supply pumps.
Innovation Solution
A parallel cylinder-type check valve design featuring two shock-absorbing dampers connected in parallel, with a longer second rocker arm to leverage the principle of a lever, allowing for both quick and slow closing motions by adjusting the force transmission, thereby reducing noise and vibration and preventing water hammer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single shock-absorbing damper is used to provide slow closing function, then noise and vibration are reduced, but backflow increases and pump damage risk increases
Solution Approach 1:
The single shock-absorbing damper is segmented into two parallel dampers (first and second dampers) with different rocker arm lengths. The first damper with shorter rocker arm provides stronger shock absorption for noise and vibration reduction, while the second damper with longer rocker arm provides additional buffering to prevent excessive backflow and pump damage, thus resolving the contradiction between noise reduction and pump protection.
2Reliability
If the valve closes quickly to prevent backflow, then pump protection is improved, but water hammer and noise occur
Solution Approach 1:
The invention changes the closing speed parameter dynamically through the dual-damper system. The parallel connection of two dampers with different rocker arm lengths creates a composite damping characteristic that allows controlled deceleration during valve closing, reducing water hammer and noise while maintaining adequate backflow prevention.
3Object-affected harmful factors
If the valve closes slowly to reduce noise and water hammer, then harmful factors are reduced, but backflow increases
Solution Approach 1:
The invention introduces asymmetry by making the second rocker arm longer than the first rocker arm. This asymmetric design creates different mechanical advantage ratios for the two dampers, allowing the system to provide both slow closing (reducing water hammer) and adequate backflow prevention through the combined effect of the two dampers with different characteristics.
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 dual shock-absorbing damper system effectively manages the closing speed of the valve, minimizing noise and vibration while preventing backflow, thus enhancing the operational safety and efficiency of water supply systems.
Implementation Method 1
a first shock-absorbing damper provided in the valve body, and including: a first bumper absorbing shock; a first shock-absorbing rod connected to the first bumper to transmit shock
Implementation Method 2
a first rocker arm connected to the first shock-absorbing rod at a first end thereof, and receiving torque from the opening and closing assembly at a second end thereof
Implementation Method 3
a transient condition in which an amount of flow and a hydraulic pressure are dramatically changed occurs. This phenomenon is referred to as water hammer or fluid hammer
Data Source
AI summary
The present invention relates generally to a parallel cylinder-type check valve and, more particularly, to a parallel cylinder-type check valve in which two shock-absorbing dampers are connected in parallel to each other so as to absorb shock when a valve is closed, wherein the length of a rocker arm connected to any one shock-absorbing damper is adjusted to be longer according to the principle of a lever in order to provide a sufficient shock-absorbing effect. Also, the present invention relates to a parallel cylinder-type check valve, which is rapidly closed at a high speed at the time of the initial closing of the valve and is slowly closed at a low speed at the later closing of the valve by means of the parallel cylinder, thereby preventing noise and vibration, as well as preventing water hammer.