Dual Valve Body Check Valve for Liquid Delivery Pump Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Check valves in liquid delivery pumps can fail to completely close due to adhesion issues, such as air bubbles or foreign matter, leading to poor liquid delivery, even when actively operated.
Innovation Solution
A check valve design featuring two pairs of valve bodies and seats, with drive mechanisms to actively detach and seat the valve bodies, ensuring reliable opening and closing operations, even in the presence of adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single valve body and valve seat are used in the check valve, then the structure is simple, but the valve may not close completely due to adhesion from air bubbles or foreign matters
Solution Approach 1:
The check valve is divided into two independent valve bodies (first valve body and second valve body) with corresponding valve seats. Each valve body-seat pair can independently close the flow passage, providing redundancy. If one pair fails to close due to adhesion or foreign matter, the other pair can still ensure complete closure, thereby resolving the contradiction between structural simplicity and closure reliability.
2Ease of operation
If a solenoid is used to actively operate the valve body, then the valve can be reliably opened even when stuck, but the valve may not close completely due to air bubbles or foreign matters
Solution Approach 1:
The valve system uses two separate valve bodies that can be independently actuated. When the solenoid actively operates one valve body, the other valve body remains available as backup for closure. This segmentation ensures that active operation mechanisms can overcome adhesion issues while the redundant structure maintains closure completeness even if one valve is compromised by air bubbles or foreign matter.
Solution Approach 2:
The drive mechanism is designed to actively detach the valve body from the valve seat before closing operations. By preliminarily ensuring the valve body is free from adhesion through active detachment, the system prevents closure failures that would otherwise be caused by stuck valve bodies, thereby ensuring both reliable opening and complete closure.
3Reliability
If two pairs of valve bodies and seats are added to ensure complete closure, then the valve closure reliability improves, but the device complexity increases
Solution Approach 1:
The check valve is divided into two independent valve bodies (first valve body and second valve body) with corresponding valve seats. Each valve body-seat pair can independently close the flow passage, providing redundancy. If one pair fails to close due to adhesion or foreign matter, the other pair can still ensure complete closure, thereby resolving the contradiction between structural simplicity and closure reliability.
Data Source
AI summary
A check valve is provided with a rectilinear flow passage having a liquid inlet and a liquid outlet and allowing a liquid to flow therethrough in one direction, and a first valve body, a first valve seat, a second valve body, and a second valve seat are provided in the rectilinear flow passage. A first drive body is provided in the rectilinear flow passage at a position closer to the liquid inlet than the first valve body so as to be movable in one direction. The first drive body is driven in one direction by the drive mechanism. The drive mechanism is adapted to set the first drive body either to an open state in which the first drive body presses the first valve body toward the liquid outlet side to detach the first valve body from the first valve seat or to a closure state in which the first drive body does not press the first valve body toward the liquid outlet but allows the first valve body to be seated on the first valve seat. A second drive body is provided in the rectilinear flow passage at a position between the first valve body and the second valve body so as to be movable in one direction. When the first drive is set to the open state, the second drive body is pressed by the first valve body toward the liquid outlet to press the second valve body toward the liquid outlet, thereby detaching the second valve body from the second valve seat, and when the first drive body is set to the closure state, the second drive body is moved away from the second valve body to allow the second valve body to be seated on the second valve seat.