一种不锈钢钢管与碳钢接触电偶腐蚀的绝缘隔离结构
By using a fiberglass and epoxy resin composite material and a low-temperature curing epoxy resin coating for insulation and isolation, the problem of corrosion of stainless steel pipes and carbon steel contact galvanometers in high-altitude and cold regions was solved, achieving long-term stable insulation and mechanical properties and extending the service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOHYDRO ENG BUREAU 4
- Filing Date
- 2025-09-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing insulation materials are prone to embrittlement in high-altitude and cold regions, losing their elasticity and insulation properties. They cannot stably block the galvanic corrosion pathway between stainless steel pipes and carbon steel in the long term. Furthermore, the rubber gaskets used in construction are prone to absorbing water and becoming embrittled, making them unsuitable for the environmental characteristics of high-altitude and cold regions.
Insulating bolt washers, insulating bolt sleeves, and insulating flange gaskets made of composite materials of glass fiber and epoxy resin are combined with low-temperature curing epoxy resin coatings to form an insulating isolation structure, enhancing insulation and mechanical properties and preventing current from being conducted through the bolts.
It maintains good insulation and mechanical properties in high-altitude and cold regions, effectively blocks galvanic corrosion pathways, extends equipment service life, and enhances connection reliability.
Smart Images
Figure CN224516186U_ABST
Abstract
Claims
1. A structure for insulating and isolating stainless steel pipe from contact galvanic corrosion with carbon steel, characterized by, It includes a stainless steel pipe (1) and a carbon steel pipe (2), wherein the stainless steel pipe (1) passes through a reinforced concrete wall (6) and is connected to the carbon steel pipe (2) by a fastening assembly, which assembles the stainless steel pipe (1) and the carbon steel pipe (2) together. An insulating isolation component is also provided between the stainless steel pipe (1) and the carbon steel pipe (2), which is used for impact resistance and high temperature resistance between the stainless steel pipe (1) and the carbon steel pipe (2).
2. The insulation isolation structure of stainless steel pipe from galvanic corrosion with carbon steel according to claim 1, characterized by, The insulating isolation assembly includes an insulating bolt washer (5), an insulating bolt sleeve (4), and an insulating flange gasket (3). The insulating bolt washer (5), the insulating bolt sleeve (4), and the insulating flange gasket (3) are all made of a composite material of glass fiber and epoxy resin. The fastening assembly includes bolts and nuts. Bolt holes are provided on the stainless steel pipe (1), the insulating flange gasket (3), and the carbon steel pipe (2). The bolts pass through the corresponding bolt holes on the stainless steel pipe (1), the insulating flange gasket (3), and the carbon steel pipe (2) and are threadedly connected to the nuts.
3. The insulating isolation structure for galvanic corrosion between stainless steel pipe and carbon steel as described in claim 2, characterized in that, An insulating bolt washer (5) is provided between the nut and the stainless steel pipe (1) or between the nut and the carbon steel pipe (2).
4. The insulation isolation structure of stainless steel pipe from galvanic corrosion with carbon steel according to claim 3, characterized by, The insulating bolt sleeve (4) is fitted onto the bolt connecting the stainless steel pipe (1) and the carbon steel pipe (2); The insulating bolt washer (5) is also fitted onto the bolt, which can increase the contact area.
5. The insulation isolation structure of stainless steel pipe from galvanic corrosion with carbon steel according to claim 4, characterized by, The length of the insulating bolt sleeve (4) is greater than the connection length of the bolt, and the outer diameter is smaller than the diameter of the bolt hole.
6. The insulation isolation structure of stainless steel pipe from galvanic corrosion with carbon steel according to claim 5, characterized by, The insulation and isolation components, fastening components, and exposed connection parts of the stainless steel pipe (1) and carbon steel pipe (2) are all coated with a protective layer; The protective layer is made of low-temperature curing epoxy resin coating with a thickness of 60-80μm.