High-Pressure Pipeline Coupling Corrosion Protection
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Solution Overview
Problem
Existing connecting structures for high-pressure lines are prone to corrosion from aggressive substances, such as sulfur-containing hydrocarbon extracts, which reduces the service life of the flange-connecting assembly due to inadequate protection of the steel components.
Innovation Solution
Incorporating a sealing sleeve between the inner cladding and the flange section, along with a radially extending sealing collar made of plastic, which isolates the ring part from the pipe's contents and acts as a gasket, eliminating the need for an O-ring, and featuring a recessed flange for enhanced sealing and clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a steel ring with O-rings is used to connect the inner cladding to the flange section, then sealing between the pipe and flange is achieved, but the steel ring is exposed to aggressive liquids causing corrosion and reduced service life
Solution Approach 1:
The patent introduces a plastic sealing sleeve as an intermediary component between the inner cladding and the steel ring. This sealing sleeve serves as a protective barrier that prevents direct contact between aggressive liquids and the steel ring, thereby eliminating corrosion while maintaining the sealing function through its own sealing capability and interaction with O-rings.
Solution Approach 2:
The patent employs a composite structure combining plastic and steel materials. The plastic sealing sleeve provides chemical resistance to aggressive liquids, while the steel ring provides structural strength. This composite approach allows each material to perform its optimal function - the plastic protects against corrosion and the steel provides mechanical support.
2Reliability
If multiple sealing components (O-rings, steel ring) are used, then sealing is achieved, but the structure becomes complex and requires multiple parts
Solution Approach 1:
The patent merges multiple sealing functions into a single integrated plastic sealing sleeve component. This sealing sleeve combines the functions of sealing against the inner cladding, protecting the steel ring, and providing a sealing surface for the flange connection. By consolidating these functions into one component, the overall structure becomes simpler while maintaining effective sealing.
Data Source
AI summary
A connecting structure includes a high-pressure line having a load-bearing shell and a sealing inner cladding, as well as a coupling, which coupling includes a flange section having a ring part and a flange which extends radially outwards with respect to the ring part, a connecting element by which the load bearing shell of a pipe is connected to the flange section, as well as a sealing element which the inner cladding of the high-pressure line is connected to the flange section, which sealing element end in the free end of the flange section which is turned away from the high-pressure line. The sealing element includes a sealing sleeve which is situated between the inner cladding of the pipe and the ring part of the flange section.