Diaphragm Pump Valve Plate Geometry for Stable Sealing
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Solution Overview
Problem
Conventional diaphragm pump valve plate fixing methods either lead to elastic fatigue and increased load due to swinging movements or result in poor sealing due to restrictive geometric shapes, affecting flow stability and lifespan in high-frequency operations.
Innovation Solution
A diaphragm pump design featuring valve plates with geometrically corresponding valve seats and extending arms that restrict the center position effectively, reducing energy loss and valid movement path, while maintaining sealing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the valve plate is fixed by a single side, double sides, or center in a cantilever-type manner, then the valve plate can be positioned on a predetermined location, but the valve plate relies on swinging movement to reach sealing position, resulting in heavier load and reduced lifespan due to elastic fatigue
Solution Approach 1:
Instead of allowing the valve plate to swing freely to reach sealing position, the patent inverts the approach by using the geometric shape of the valve seat to actively guide and restrict the valve plate's movement path, ensuring it reaches the sealing position directly without excessive swinging motion
Solution Approach 2:
The patent changes the geometric parameters of the valve seat (such as the shape and position of receiving troughs and runner gates) to control the valve plate's movement characteristics, optimizing both positioning accuracy and reducing elastic fatigue
2Reliability
If the valve plate is fixed using a geometric shape of the valve seat to restrict movement freedom, then sealing effect is improved, but the center position of the valve plate cannot be effectively controlled, causing movement along redundant paths and increased frictional resistance
Solution Approach 1:
The valve seat is segmented into multiple functional zones including receiving troughs, runner gates, and geometric restriction features that work together to simultaneously control the valve plate's center position and guide its movement path for optimal sealing with minimal friction
Solution Approach 2:
The patent employs asymmetric geometric shapes in the valve seat design, where the receiving troughs and runner gates are positioned and shaped differently to effectively control the valve plate's center position while maintaining proper sealing contact
3Reliability
If the valve plate is made of softer material to increase sealing effect and reduce system load, then sealing is improved, but the softer material causes excessive deformation of the sealing side, increasing conveying mechanism load and blocking flow outlet area
Solution Approach 1:
The patent applies local quality by designing the valve plate with a sealing surface that has specific geometric features and material properties localized to the sealing area, while the extending arms and other portions have different properties to prevent excessive deformation and maintain flow passage
Data Source
AI summary
A diaphragm pump includes a valve seat, a head cover covered on the valve seat, and a pair of valve plates. A surface of the valves seat is formed concavely with a first receiving trough with a first flow passage, and a second receiving trough with a second flow passage. One of the valve plates is disposed in the first receiving trough, and the other one is disposed in the second receiving trough. The first and second receiving troughs respectively have a geometric shape corresponding with that of the valve plate. The valve plate has a sealing part, and at least one extending arm extended outwardly from the sealing part. The sealing part has a geometric shape being bilaterally symmetrical. The extending arm has an arced end. A gap is existed between an edge of the valves plate and the first receiving trough or the second receiving trough.