Smooth-Surface Hose Joint for Soft Silicone Hose Clamping
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Solution Overview
Problem
Flexible hoses made of silicone rubber, which are softer and have lower tearing and tensile strength, are prone to damage and fluid leakage when tightened using conventional hose joints with barbed protrusions, as they can easily be cut and fractured by the clamping mechanism.
Innovation Solution
A hose joint design featuring a cylindrical nipple with a smooth large-diameter face that pressure-welds the hose and an elastic sleeve that radially deforms to clamp the hose, preventing damage and ensuring secure connection without cutting the hose material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If barbed-shaped protrusions and peripheral protrusions are used to clamp the hose tightly, then the hose connection strength is improved, but the hose material is damaged and fractured
Solution Approach 1:
The patent introduces a smooth cylindrical face on the nipple and a smooth cylindrical inner face on the sleeve as intermediary surfaces that contact the hose. These smooth surfaces act as mediators between the clamping mechanism and the hose, distributing the clamping force uniformly across the hose surface without creating localized stress concentrations that would cause cutting or fracturing of the soft hose material.
Solution Approach 2:
The patent changes the surface geometry parameters of the clamping surfaces from protruding barbed shapes to smooth cylindrical surfaces. This parameter change in surface topology transforms the stress distribution from concentrated point loads to distributed surface loads, preventing the hose material from being cut or fractured while maintaining adequate clamping strength.
2Reliability
If strong tightening is implemented between protrusions, then the hose is securely clamped, but the inner face and outer face of the hose are bitten into and damaged
Solution Approach 1:
The smooth cylindrical face of the nipple and the smooth cylindrical inner face of the sleeve serve as intermediary contact surfaces that distribute the clamping force uniformly across the hose surface. This intermediary smooth surface contact prevents the hose material from being bitten into or damaged by the tightening mechanism, while still achieving secure clamping through uniform radial compression.
3Object-affected harmful factors
If a smooth large-diameter cylindrical face is used on the nipple, then the hose is pressure-welded without damage, but the clamping force distribution changes
Solution Approach 1:
The patent changes the surface geometry parameter from protruding barbed shapes to a smooth large-diameter cylindrical face on the nipple. This parameter change creates a larger contact area that distributes the clamping force uniformly, preventing damage to the hose inner surface through pressure welding while maintaining effective clamping through the increased surface area contact.
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 design effectively prevents fracture and leakage by distributing stress and maintaining a stable connection, even with soft materials like silicone rubber, enhancing safety and preventing fluid leaks.
Implementation Method 1
an elastic sleeve which is provided so as to clamp the insertion space of the flexible hose between an outer peripheral face of the nipple and the elastic sleeve in a radial direction and is deformable in the radial direction
Implementation Method 2
a tightening member provided outside of the elastic sleeve and having a pressing part which presses the elastic sleeve toward the nipple
Implementation Method 3
the nipple has a large-diameter cylindrical face which is smooth in the axial direction and faces and pressure-welds to an inner surface of the flexible hose in the radial direction
Data Source
AI summary
A hose joint includes a cylindrical nipple provided along an insertion space of the flexible hose, an elastic sleeve which is provided so as to clamp the insertion space of the flexible hose between an outer peripheral face of the nipple and the elastic sleeve in a radial direction and is deformable in the radial direction, and a tightening member provided outside the elastic sleeve and having a pressing part that presses the elastic sleeve toward the nipple, wherein the nipple has a large-diameter cylindrical face which is smooth in the axial direction and faces and pressure-welds to an inner surface of the flexible hose in the radial direction on an axial direction front end of an outer peripheral face, and the elastic sleeve has a cylindrical inner face which is smooth in the axial direction and pressure-welds to an outer surface of the flexible hose.