Bellows Pump Valve Stiffness and Sealing Design
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Solution Overview
Problem
Existing pump devices with traditional ball valves or flap valves face limitations in performance and functionality, particularly in terms of stiffness and particulate handling, which can lead to operational inefficiencies and aesthetic drawbacks.
Innovation Solution
The design incorporates a valve stem with a thicker cross-sectional area and geometric shapes for increased stiffness, a conically shaped outlet valve for improved sealing, and features like support ribs and stepped outlet valves to manage particulates, along with a bellows configuration that includes an outer and inner rim ring for enhanced stability and actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional ball valve or flap valve is used in a pump device, then the pump can operate with basic functionality, but the stiffness and performance are limited, leading to operational inefficiencies
Solution Approach 1:
The valve stem cross-sectional area is increased from traditional designs to provide greater stiffness and structural strength. This parameter change allows the valve to better withstand operational forces while maintaining pump functionality, directly resolving the contradiction between stiffness and operational efficiency.
Solution Approach 2:
The valve stem incorporates a geometric cross-sectional shape (such as I-shaped or H-shaped sections) that combines structural reinforcement with functional requirements. This composite geometric design enhances stiffness without compromising the valve's ability to perform its pumping function.
2Reliability
If a traditional valve design is used, then the pump structure remains simple, but particulate matter can hinder valve operation and reduce functionality
Solution Approach 1:
The outlet valve incorporates a conical shape with a stepped configuration that creates specific local zones for particulate collection. The step feature forms a recess area where particulate matter can be trapped, preventing it from interfering with the valve's sealing and operation, thereby improving reliability without requiring a completely complex redesign.
3Manufacturing precision
If a conical outlet valve is used for improved sealing, then the discharge control is enhanced, but the valve stem requires thicker cross-section to maintain stiffness
Solution Approach 1:
The valve stem employs a composite geometric cross-section (I-shaped or H-shaped) that provides both the structural stiffness needed to support the conical outlet valve and the flexibility required for proper valve operation. This composite geometry allows the thinner valve stem sections to maintain adequate stiffness while enabling the conical sealing surface to function effectively.
Data Source
AI summary
A bellows pump having an inlet passage, interior chamber and discharge passage and also having a base and unitary valve member. The pump possesses an improved valve configuration as well as an improved bellows/base configuration, among other things.