Hose Pump Guide Rollers for Secure Threading
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Solution Overview
Problem
Existing hose pumps face challenges in reliably threading hose sections of varying lengths and material compositions, leading to potential unthreading and blockages during operation, especially at high pressures, due to mechanical properties like extensibility and friction.
Innovation Solution
The hose pump design incorporates guide rollers with a second guide plane formed by guide cylinders and an annular flange, allowing initial guidance and pretensioning of the hose, which ensures secure threading and minimizes friction with the counter bearing, independent of hose material properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hose section is too short, then it can be easily inserted, but it will be stretched too much during threading and slip out of the guide groove
Solution Approach 1:
The hose is pretensioned before threading by positioning it between the guide cylinders and the annular flange. This preliminary action applies tension to the hose, ensuring it is sufficiently taut to engage securely with the guide groove during the threading operation, preventing it from slipping out despite being short.
2Ease of operation
If the hose section is too long, then it can be easily inserted, but it forms a loop at the outlet that protrudes above the support surface and is not guided properly
Solution Approach 1:
The hose is pretensioned in advance by the annular flange and guide cylinders arrangement, which applies a pulling force to ensure the hose is taut during threading. This preliminary tensioning action prevents excessive hose length from forming unguided loops at the outlet, ensuring proper guidance throughout operation.
Solution Approach 2:
The mechanical parameters of the hose (tension, position) are changed during the threading process through the pretensioning mechanism. By dynamically adjusting the tension parameter via the annular flange and guide cylinders, the system adapts to hoses of varying lengths, ensuring optimal guidance and preventing loop formation at the outlet.
3Reliability
If the hose is threaded securely, then reliable pumping operation is achieved, but threading becomes difficult due to friction and material properties
Solution Approach 1:
The guide cylinders and annular flange act as intermediary elements between the operator and the hose during threading. These components facilitate the threading process by providing a controlled pretensioning mechanism that reduces friction and guides the hose smoothly into position, making secure threading easier to achieve despite varying hose material properties.
4Extent of automation
If motor-driven device with worm gear is used, then automated insertion and removal is achieved, but the device becomes expensive
Solution Approach 1:
The hose threading process is made self-service through the pretensioning mechanism formed by the guide cylinders and annular flange. The hose itself, when pretensioned, automatically engages with the guide groove without requiring external motor-driven actuators. This self-threading capability achieves automation functionality while avoiding the high costs associated with motor-driven worm gear devices.
Data Source
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AI summary
The invention relates to a peristaltic pump for conveying a fluid contained in a hose, comprising a hose bed (2) with a counter bearing (4) for receiving the hose, a carrier disc (1) rotatable relative to the counter bearing (2), a plurality of pinch rollers (3) arranged circumferentially on the carrier disc (1), and a plurality of guide rollers (5) arranged circumferentially on the carrier disc (1) with a guide groove (25) extending circumferentially around their outer circumference, which forms a first guide plane (A) facing the carrier disc (1). To ensure reliable insertion and removal of various hoses with different properties into and from the hose bed, each guide roller (5) has a guide cylinder (26) above the guide groove (25) for guiding the hose when inserting it into and/or removing it from the hose bed (2).