Peristaltic Hose Pump Self-Acting Clamping Mechanism
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Solution Overview
Problem
The existing peristaltic hose pumps require complex manual handling for hose insertion and clamping, especially in applications like heart-lung machines, where automatic and self-acting clamping is necessary for efficient operation.
Innovation Solution
The support element is designed to move towards and away from the rotor by rotating the drive shaft, creating a space for easy hose insertion and subsequent automatic clamping, allowing for simple and self-acting hose clamping and release mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hose is manually clamped tight in the hose pump, then the hose is securely fixed, but the insertion process becomes complex and requires manual intervention
Solution Approach 1:
The support element is moved away from the rotor in advance to create an intermediate space, allowing the hose to be easily inserted before clamping occurs. This preliminary positioning action simplifies the overall insertion process by preparing the space beforehand.
Solution Approach 2:
The rotation of the drive shaft automatically moves the support element toward the rotor to clamp the hose, eliminating the need for separate manual clamping actions. The system performs the clamping function automatically through its own operational movement.
2Ease of operation
If the support element is fixed in position, then the structure is simple, but the hose cannot be easily inserted and removed
Solution Approach 1:
The support element is designed to be movable rather than fixed, allowing it to change position relative to the rotor. This dynamic capability enables the creation of insertion space and the automatic clamping function through rotation-driven movement.
Solution Approach 2:
The movable support element serves multiple functions: it creates insertion space when moved away, provides clamping when moved toward the rotor, and enables both hose insertion and removal operations. This multi-functionality reduces the need for separate mechanisms.
3Ease of operation
If the drive shaft rotates continuously, then pump operation is maintained, but the support element cannot be positioned for hose insertion
Solution Approach 1:
The drive shaft performs periodic reverse rotations to move the support element away from the rotor, creating insertion space. During the forward rotation phases, normal pump operation occurs. This periodic interruption allows hose insertion while maintaining overall pump functionality.
Solution Approach 2:
The support element is temporarily extracted from its operational position near the rotor to create space for hose insertion. This temporary removal allows the insertion operation to occur without interfering with the main pump structure.
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
This design simplifies the hose insertion process and enables automatic clamping, facilitating the use of blood-carrying modules without manual intervention, ensuring efficient pump operation and easy hose removal.
Implementation Method 1
the support element is movable by a predetermined distance in the direction toward the rotor by rotation of the drive shaft in a first direction of rotation
Implementation Method 2
By a rotation of the drive shaft, the rotor is set into rotation and in this process presses against the flexible hose with pressing elements, typically rollers, with the support element serving as a counter support. A fluid, e.g. a liquid, located in the hose is thereby pressed in the direction of rotation by the hose.
Data Source
AI summary
A peristaltic hose pump has a rotor which is rotatable by a drive shaft as well as a support element which extends along a part of the rotor periphery. A flexible hose is inserted between the support element and the rotor. The support element is movable in the direction toward the rotor by rotation of the drive shaft.