Arcuate Compressing Part With Flanges for Peristaltic Pump Hose Alignment
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Solution Overview
Problem
The service life of elastomeric hoses in peristaltic pumps is affected by positional offsets, leading to inadequate compression and potential damage due to malalignment with the hose-compressing block and rollers, resulting in premature wear and leakage.
Innovation Solution
The elastomeric-hose-compressing part features an arcuate surface with flanges on either side, designed with specific height and width ratios, and a convex top wall, along with a recessed inner sidewall, to ensure consistent compression and prevent hose offset, integrated into a cartridge and roller assembly for the pump head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a plane compressing surface is used for the hose-compressing block, then the structure is simple, but the elastomeric hose cannot be compressed tightly and may have positional offset
Solution Approach 1:
The compressing surface of the hose-compressing block is designed with an arcuate shape that matches the curvature of the elastomeric hose cross-section. This curved surface ensures uniform contact and compression across the entire hose circumference, preventing positional offset and ensuring reliable sealing during pump operation.
2Ease of manufacture
If column-shaped rollers are used, then the manufacturing is simple, but the elastomeric hose may contact exterior structures causing damage
Solution Approach 1:
The rollers are designed with an arcuate compressing surface that is asymmetric relative to the roller axis, specifically shaped to match the hose cross-section. This asymmetric curved design ensures the hose remains properly positioned during compression, preventing it from contacting damaging exterior structures while maintaining ease of manufacture.
3Force
If the elastomeric hose is compressed outside the hose-compressing block, then compression force is applied, but the hose contacts exterior structures causing damage
Solution Approach 1:
The hose-compressing block incorporates lateral flanges that extend perpendicular to the compression direction, creating a three-dimensional containment structure. These flanges guide the hose laterally into the correct compression zone, ensuring compression occurs within the block boundaries and preventing contact with damaging exterior structures.
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 reliably limits the elastomeric hose between the compressing surface and rollers, reducing abnormal abrasion and extending hose life, thereby enhancing operational efficiency and reducing replacement frequency.
Implementation Method 1
the elastomeric hose should have certain elasticity, such that the hose may quickly restore shape from a radial stress
Data Source
AI summary
Provided are an elastomeric-hose-compressing part, a cartridge, and a roller assembly for a pump head of a peristaltic pump, and a pump head for a peristaltic pump. The elastomeric-hose-compressing part includes a surface for compressing the elastomeric hose which has an arcuate shape along its length direction, wherein the surface for compressing the elastomeric hose is provided with flanges oppositely arranged on two side portions of the elastomeric-hose-compressing part in the width direction, the width direction of the elastomeric-hose-compressing part is perpendicular to the length direction, and the surface for compressing the elastomeric hose is formed by a continuous surface or by a plurality of surfaces sequentially arranged along the length direction. By providing flanges at two sides of the surface for compressing the elastomeric hose, the elastomeric-hose-compressing part as disclosed may reliably limit the elastomeric hose between the surface for compressing the elastomeric hose and the roller assembly of the peristaltic pump, which thus reduces abnormal abrasion of the elastomeric hose.