Peristaltic Pump Cam Synchronization for Continuous Hose Flow
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Solution Overview
Problem
Existing peristaltic pumps face challenges in maintaining continuous fluid flow due to intermittent pumping caused by the squeezing action of the peristaltic fingers, and the structural relationship between the compensation device and the squeezing peristaltic pump body is complex, making manufacturing, calibration, and maintenance difficult.
Innovation Solution
A compensating device is integrated into the peristaltic pump to synchronize the activation timings of the squeezing and compensating devices, ensuring continuous fluid flow by setting the start points of the cams' travel sections to coincide, and the compensating device activates before the fluid discharge shut-off valve closes to prevent flow shutoff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compensating device is installed downstream of the squeezing peristaltic pump body to compensate for pulsation, then fluid flow continuity is improved, but device complexity and difficulty of manufacture increase
Solution Approach 1:
The patent merges the compensating device with the squeezing peristaltic pump body by integrating the compensating cam mechanism into the existing cam shaft system. The compensating cam is positioned adjacent to the peristaltic fingers on the same cam shaft, creating a unified structure that eliminates the need for separate downstream compensation devices and reduces overall system complexity while maintaining pulsation compensation functionality
Solution Approach 2:
The patent introduces a compensating cam as an intermediary element that mediates between the peristaltic fingers and the hose. This compensating cam works in conjunction with the peristaltic fingers to provide continuous squeezing action, acting as a mediator that smooths out pulsations without requiring complex downstream compensation mechanisms
2Productivity
If multiple groups of peristaltic fingers are arranged side by side to increase pumping capacity, then productivity is improved, but finding a structural relationship for pulsation compensation becomes more difficult
Solution Approach 1:
The patent makes the cam shaft system universal by designing it to accommodate multiple groups of peristaltic fingers while simultaneously providing pulsation compensation functionality. The single cam shaft carries both the peristaltic fingers and the compensating cam, allowing the same structural element to serve multiple functions: driving multiple finger groups and providing pulsation compensation, thereby simplifying the structural relationship despite increased pumping capacity
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-interrupted fluid pumping, simplifies manufacturing and maintenance, and prevents fluid backflow by coordinating the activation timings of the cams and compensating device, ensuring consistent fluid output.
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 compensating device is integrated into the peristaltic pump to synchronize the activation timings of the squeezing and compensating devices, ensuring continuous fluid flow
Data Source
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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. In the disclosure, the compensating device is additionally provided in the squeeze peristaltic pump to compensate for fluid flow shutoff occurring due to only a squeezing device being employed to squeeze the hose for fluid pumping. Cooperation between the compensating device and the squeezing device enables continuous, non-intermittent fluid pumping.