Peristaltic Pump Pipe Attachment With Adjustable Ring Sealing
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Solution Overview
Problem
Existing peristaltic pumps suffer from unsatisfactory seals between the pipe and the pump body and between the pipe and the insert, leading to leaks and high production costs due to the use of multiple components, and are sensitive to dimensional variations of the pipe.
Innovation Solution
A peristaltic pump design featuring a deformable elastic ring inserted into a circular groove in the pump body, compressed by a pusher with adjustable pressure, which enhances the seal between the pipe and the insert and eliminates the need for an elastomer sleeve and additional collars, allowing for improved attachment and tolerance to pipe length variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple components (collars, elastomer sleeve) are used to ensure seal, then seal reliability is improved, but device complexity and production costs increase
Solution Approach 1:
The patent merges multiple sealing components (collars and elastomer sleeve) into a single integrated fixing device that includes a clamp and sealing elements as one piece. This reduces the number of separate components while maintaining the sealing function, directly resolving the contradiction between seal reliability and device complexity
Solution Approach 2:
The fixing device is designed to perform multiple functions simultaneously: mechanical attachment of the pipe, sealing against leaks, and compression of the pipe against the insert. This multi-functional design eliminates the need for separate components for each function, reducing overall device complexity while ensuring reliable sealing
2Device complexity
If fixed compression is used with conical insert, then attachment is simplified, but seal quality deteriorates due to sensitivity to pipe dimensional variations
Solution Approach 1:
The patent introduces an adjustable compression mechanism that allows the compression force applied to the pipe to be modified according to actual needs. This dynamic adjustment capability compensates for pipe dimensional variations and material differences, ensuring consistent seal quality without requiring complex pre-calculated fixed compression designs
Solution Approach 2:
The fixing device includes an adjustment mechanism that enables changing the compression parameter (force) applied to the pipe. This allows optimization of the sealing pressure to match specific pipe characteristics and operating conditions, resolving the issue of seal quality deterioration due to fixed compression sensitivity
3Adaptability or versatility
If adjustable compression is implemented, then seal adaptability is improved, but device complexity increases due to additional adjustment mechanisms
Solution Approach 1:
The fixing device is segmented into distinct functional elements: a clamp portion for attachment, a sealing element, and an adjustment mechanism. This segmentation allows each component to be optimized independently and assembled in a modular fashion, reducing overall device complexity while maintaining adjustability
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 provides a robust, adjustable, and leak-tight seal, reducing component complexity and costs while accommodating dimensional variations, thereby enhancing the reliability and efficiency of the pump's fluid displacement mechanism.
Implementation Method 1
a deformable elastic ring inserted into the circular groove, and a pusher fixed to the pump body and having the shape of a ring including a protrusion complementary to the shape of the groove, the elastic ring being compressed by the pusher with a pressure which is adjustable independently of the bracket and the flange
Implementation Method 2
The material constituting the elastic ring also ensures the seal between the pipe and the pump body by plugging the voids between the outer wall of the pipe and the inner wall of the pump body
Data Source
AI summary
A peristaltic pump (1) comprising a pump body (2), an inlet (21), an outlet (22) and a pipe (4) attached to the inlet (21) and to the outlet (22) by a device comprising: —a flange (5) held to the pump body (2) by a bracket (6), —an insert (8), inserted against the inner wall (41) of the pipe (4) and comprising a shoulder (82), the inner wall of which bears against the outer wall (52) of the flange (5), characterised in that the pump body (2) comprises an inner circular groove (23) at the inlet (21) and at the outlet (22), and in that the securing device comprises a deformable elastic ring (10) inserted into said circular groove (23), and a pusher (11) having the shape of a ring comprising a projection matching the shape of the groove, the elastic ring (10) being compressed by the pusher (11).