Silicone-Polyurethane Conduit Insulation for Crack Resistance
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Solution Overview
Problem
Pipes submerged in seabeds or desert environments face significant temperature differentials and mechanical stresses, leading to deterioration of polyurethane-based insulation and sealing structures, which can cause cracks, allowing temperature changes to affect fluid circulation, potentially causing production issues or explosions.
Innovation Solution
A two-component sealing and insulation device comprising a silicone cylinder and a polyurethane sleeve, where the sleeve is longer than the cylinder and can deform to securely fit around pipes, providing a flexible and durable seal that resists environmental stresses and temperature fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polyurethane-based insulation and sealing structures are used around pipe joints, then insulation performance is improved, but the structure deteriorates under mechanical stresses and temperature differentials, leading to cracks
Solution Approach 1:
The patent employs a composite structure consisting of an inner polyurethane insulation layer and an outer silicone protective layer. The polyurethane provides superior insulation performance, while the silicone layer provides enhanced mechanical strength and resistance to environmental stresses. This composite material approach allows the system to simultaneously achieve good insulation and high reliability under harsh conditions.
Solution Approach 2:
The patent changes the material parameter of the protective layer from pure polyurethane to a silicone-polyurethane composite. Silicone has different physical properties including higher elasticity, better resistance to temperature differentials, and improved mechanical strength. This parameter change in material composition resolves the contradiction by maintaining insulation performance while significantly improving structural integrity under mechanical stresses.
2Strength
If the insulation structure is made rigid to resist environmental stresses, then structural strength is improved, but flexibility and adaptability to pipe movements are reduced
Solution Approach 1:
The patent uses a silicone-based outer layer that inherently possesses flexible properties. Silicone rubber and similar elastomeric materials can deform elastically under stress and return to their original shape, providing both strength and flexibility. This flexible shell approach allows the insulation structure to adapt to pipe movements and thermal expansion while maintaining resistance to environmental stresses.
Solution Approach 2:
The patent creates a dynamic system where the outer silicone layer can move and deform with the pipe it protects. Rather than a fixed rigid structure, the silicone coating adapts its shape and position in response to pipe movements, maintaining continuous protection. This dynamic adaptability resolves the contradiction between strength and flexibility.
3Adaptability or versatility
If the insulation structure is made flexible to accommodate pipe movements, then adaptability is improved, but structural strength and crack resistance are reduced
Solution Approach 1:
The patent combines two materials with complementary properties: polyurethane for insulation and silicone for protective strength. The silicone layer, being more elastic and tear-resistant, provides the crack resistance needed while allowing flexibility. This composite structure ensures that the flexible outer layer does not compromise overall structural integrity.
4Temperature
If cracks form in the polyurethane insulation, then temperature transfer is prevented, but fluid circulation is affected and production safety is compromised
Solution Approach 1:
The patent applies a protective silicone layer beforehand to prevent the formation of cracks in the underlying polyurethane insulation. This preventive measure addresses potential damage before it occurs, ensuring that the temperature isolation function is never compromised and that no harmful temperature transfers affect the fluid circulation or production safety.
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 device ensures a reliable and crack-resistant seal, maintaining fluid circulation integrity by preventing temperature changes from affecting the internal pipeline environment, thus enhancing the performance and safety of fluid transfer systems in challenging environments.
Implementation Method 1
a basic component made in the form of a very long cylinder made of silicone material, and the second component made of polyurethane being capable of partially surround said first component
Implementation Method 2
sealing and insulation device for ducts and pipe connection systems for fluids of any kind
Data Source
Figure 1
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AI summary
The device has a sealing and insulating structure including a primary component realized in form of a cylinder (B) made of silicone material, and a secondary component made of polyurethane to partially surround the primary component. The secondary component is in form of a sleeve (C) having length greater than that of the primary component defined by the cylinder. The structure is positioned around isolation tubes that are opened for permitting insertion of the structure and closed due to deformation of the cylinder parts, which are not covered by the sleeve.