Peristaltic Pump Alternating Squeeze Design for Continuous Flow
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Solution Overview
Problem
Existing squeeze peristaltic pumps pump fluid in an intermittent manner due to the intermittent operation of the squeezing device, leading to fluid flow shutoff and backflow issues.
Innovation Solution
A compensating device is introduced to work in conjunction with the squeezing device, and the activation timings of these devices are coordinated to ensure continuous fluid pumping, using a cam mechanism to control the movement of the valves and press blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only a squeezing device is used to pump fluid, then the structure is simple, but the fluid flow is interrupted and pumping is intermittent
Solution Approach 1:
The pump is divided into multiple independent squeezing devices (first squeezing device and second squeezing device) that operate alternately. Each device has its own driving mechanism (first driving mechanism and second driving mechanism), allowing them to work in sequence to maintain continuous fluid flow while keeping each individual component relatively simple.
Solution Approach 2:
The patent implements continuous squeezing action by coordinating two squeezing devices to work alternately. The first squeezing device squeezes during its driving cycle while the second squeezing device prepares or releases, ensuring that at least one device is always squeezing the hose to maintain continuous fluid flow without interruption.
2Reliability
If a compensating device is added to achieve continuous pumping, then fluid flow continuity is improved, but the device complexity increases
Solution Approach 1:
The patent combines the compensating function with the primary squeezing function by using a second squeezing device that serves dual purposes: it compensates for the intermittent flow during the first device's cycle and also acts as a functional counterpart in the alternating squeezing sequence. This merging reduces the need for entirely separate compensating mechanisms.
Solution Approach 2:
The second squeezing device is designed with multi-functionality, serving both as a compensating device to maintain continuous flow and as an active pumping device in the alternating sequence. This universal design allows a single component to fulfill multiple roles, reducing overall system complexity despite the addition of functionality.
3Ease of operation
If the squeezing working block alternates between squeezing and relaxing, then the hose can accumulate and discharge fluid, but the pumping process becomes intermittent
Solution Approach 1:
The patent employs periodic action by coordinating two squeezing devices to operate in alternating cycles. While one device is in its squeezing phase, the other is in its release or preparation phase, creating a continuous periodic sequence that eliminates dead time and maintains steady pumping efficiency.
Solution Approach 2:
The second squeezing device performs preliminary action by preparing to squeeze as the first device is completing its cycle. This overlapping timing ensures that the transition between devices is seamless, with the second device already positioned and ready to take over immediately when the first device releases, preventing any interruption in fluid flow.
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 solution enables continuous, non-intermittent fluid pumping by preventing fluid flow shutoff and minimizing backflow, ensuring consistent fluid flow.
Implementation Method 1
the hose is elastically deformed to form a negative pressure at a fluid inlet port of the hose, whereby fluid is drawn into the hose
Implementation Method 2
A squeeze peristaltic pump is an apparatus for fluid pumping. It operates by using a drive system to bring a squeezing device to squeeze a hose
Data Source
AI summary
Disclosed are a squeezing peristaltic pump for continuous transfer and a fluid transfer method. The squeezing peristaltic pump for continuous transfer includes: a housing, a transmission part, a pressing unit, and a limiting plate, the limiting plate being securely connected to the housing, a hose being disposed between the pressing unit and the limiting plate, the pressing unit being driven by the transmission part to move reciprocally to press the hose; wherein the pressing unit includes a squeezing device and a compensating device, the squeezing device and the compensating device being sequentially arranged along an output direction of fluid in the hose, in operation, the transmission part is configured to drive the squeezing device and the compensating device to alternately squeeze the hose.