Bimetallic Weld Seam Sleeve With Segmented Centering Stops
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Solution Overview
Problem
Existing protective sleeves for pipeline weld seams suffer from poor centering and longitudinal stability, leading to inadequate sealing and structural fragility due to the design of stop rings and thermoactive materials.
Innovation Solution
A bimetallic protective sleeve with a stainless steel sleeve body, trapezoidal carbon steel centering stops, and oil and petrol-resistant rubber collars, which improves centering and sealing by eliminating the need for a stop ring and providing transverse stability and thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a stop ring with trapezoidal stops is used in the protective sleeve, then the sleeve can be positioned along the transverse axis, but the centering is poor and the sleeve can be installed lopsidedly inside the pipe
Solution Approach 1:
The stop ring is divided into separate centering stops that are distributed around the perimeter of the sleeve body. These individual stops can be independently positioned to ensure proper centering, eliminating the lopsided installation problem caused by a single integrated stop ring structure.
Solution Approach 2:
Different parts of the sleeve have different properties: the centering stops are made of carbon steel for structural support, while the sleeve body is stainless steel for corrosion resistance. The centering stops are strategically positioned at specific locations around the perimeter to provide localized centering function without compromising the overall sleeve integrity.
2Object-affected harmful factors
If thermoactive foaming material is used to fill the annular space, then corrosion is prevented, but the longitudinal stability is poor and the structure becomes fragile
Solution Approach 1:
The stop ring structure is completely removed from the design. Instead, individual centering stops are distributed around the sleeve body, eliminating the structural weaknesses and fragility associated with the traditional stop ring while maintaining the corrosion protection function through the internal anti-corrosion coating.
Solution Approach 2:
The protective sleeve uses a composite structure combining stainless steel sleeve body for corrosion resistance with carbon steel centering stops for mechanical support. This composite approach allows each material to perform its optimal function while maintaining overall structural stability.
3Ease of operation
If flared ends are used on the sleeve, then installation is facilitated, but the longitudinal stability and sealing of weld seams deteriorate
Solution Approach 1:
The flared ends are pre-formed on the sleeve body during manufacturing, allowing for easy installation without requiring additional forming operations. The flared geometry is optimized to provide sufficient insertion ease while maintaining the structural integrity needed for proper weld seam sealing.
Solution Approach 2:
The geometry of the flared ends is carefully controlled with specific angular and dimensional parameters that balance installation ease with longitudinal stability. The flare angle and transition curvature are optimized to prevent deformation during installation while ensuring proper positioning for weld seam sealing.
Data Source
AI summary
The invention relates to the field of pipeline construction and repair, and in particular to a bimetallic protective sleeve for a weld seam of pipelines. The sleeve comprises a sleeve body, centering stops and two rubber collars. The sleeve body is made of stainless steel and configured as a ring having flared ends. The centering stops have a trapezoidal shape and evenly distributed along a transverse axis of symmetry of the sleeve body. The rubber collars are arranged symmetrically relative to the centering stops along the perimeter of the ends of the sleeve body. The technical result consists in increasing the reliability of the protective sleeve.