Hose Coupling Locking Structure for Leak-Proof Analytical Connections
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Solution Overview
Problem
Existing hose coupling methods for analytical systems are costly, require specialized tools, and are not user-friendly, especially for hoses with lower Shore hardness, due to the need for precise assembly and the risk of turbulence and leakage.
Innovation Solution
A hose coupling system comprising a sleeve with a locking ring and a plug with a hook and seal, allowing for a secure, rotatable connection that is independent of tightening torque, and provides visual feedback on connection status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a formed flange connection is used for hard fluoropolymer hoses, then a tight connection is achieved, but the assembly process becomes complex and costly due to required auxiliary devices and tools
Solution Approach 1:
The connection system is divided into three main segments: the hose with integrated flange, the coupling body, and the cap. The flange itself is segmented into a sealing surface and a reinforcement structure. This segmentation allows each component to be manufactured independently with optimized functions, simplifying the overall assembly process while maintaining connection reliability.
Solution Approach 2:
The hose flange is designed to be self-forming during the coupling assembly process. When the cap is screwed onto the coupling body, the flange automatically seals against the coupling body's sealing surface without requiring external forming tools or devices. The reinforcement structure on the flange self-adjusts to distribute clamping forces evenly, eliminating the need for auxiliary holding devices.
2Manufacturing precision
If machined individual parts are used for fittings, then precise connections are achieved, but manufacturing costs increase
Solution Approach 1:
The flange is merged directly with the hose as an integrated component rather than a separate machined part. The reinforcement structure is merged with the flange to provide both sealing and structural support functions in one element. This merging eliminates the need for multiple machined components and reduces assembly steps while maintaining precise connections.
Solution Approach 2:
The design transitions from machined parts to molded plastic components with optimized geometric parameters. The flange's sealing surface parameters are specifically designed to work with the coupling body's corresponding parameters, achieving precise connections through molded features rather than post-manufacturing machining operations.
3Reliability
If an insert with mandrel is used for sealing, then sealing is achieved, but assembly effort increases and flow resistance is created
Solution Approach 1:
The sealing surface is pre-formed on the coupling body during manufacturing, eliminating the need for separate mandrels or inserts during assembly. The flange's sealing surface is pre-configured to match the coupling body's sealing features, allowing direct assembly without additional components that would increase assembly effort or create flow resistance.
4Reliability
If elastomer seal is slipped over hose end, then sealing is achieved, but connection tightness becomes dependent on assembly quality
Solution Approach 1:
The flange's reinforcement structure acts as a cushioning element that distributes clamping forces evenly across the sealing interface before the final tight connection is achieved. This pre-distribution of forces compensates for minor assembly variations and tolerance deviations, ensuring reliable sealing without requiring extremely precise assembly.
Solution Approach 2:
The connection system combines the hose material, flange material, and sealing surface materials into a composite structure with optimized properties. The flange uses materials with appropriate hardness and elasticity to ensure both sealing effectiveness and tolerance compensation, creating a robust connection that is less sensitive to assembly variations.
5Ease of operation
If barbed connector with mushroom-shaped mandrel is used, then tool-less connection is achieved, but contact forces increase and connection stability is reduced
Solution Approach 1:
The connection transitions from a static barbed mandrel design to a dynamic screw-cap assembly where the cap rotates and threads onto the coupling body. This dynamic assembly process allows for controlled application of clamping forces through the threaded engagement, providing both ease of assembly and stable, secure connection without requiring excessive contact forces on the hose.
Data Source
AI summary
A hose coupling for a fluidic connection in an analytical system, and a method of using the same. The hose coupling comprises a sleeve comprising a first hollow cylinder having a channel connected to a hose at one end and having a first opening for receiving a plug at the other end, the end for receiving the plug being at least partially surrounded by a locking ring and having a handle with a gripping surface on the opposite side to the locking ring; and a plug comprising a second hollow cylinder which is at least partially inserted into the opening of the sleeve, the end which is inserted into the plug having a hook on one side.