Abstract: Large diameter, high pressure and high steel grade are the development trends for natural gas pipelines worldwide. Pipeline develops towards super-large transmission capacity. Based on the conditions of the climatic environment of Northern Tianshan Mountain in Xinjiang and the natural gas pipeline with a diameter of 1422mm and pressure of 12MPa, the analysis was made of the technological bottlenecks related to the pipeline’ s quick-opening closure, such as complex-shaped structure, high pressure, large diameter, low temperature and high impact. Two sets of 12. 6MPa DN1550 safe self-locking quick-opening closure were developed for the OD1422 Natural Gas Pipeline on the basis of such measures as adoption of finite element analysis and stress-testing verification method, lowtemperature functional inspection of the whole device and innovative designs like structural optimization, material optimization and invention of buffering device. Performance testing and engineering application confirmed the reliability of the product.

Key words: OD1422 Natural Gas Pipeline, quick-opening closure, research and development, application

摘要： 大口径、高压力、高钢级是世界天然气管道的发展趋势, 并进一步向超大输量方向发展。目前我国正在 开展超大输量管道的研究工作。以新疆北天山气候环境、直径1 422 mm、压力12 MPa 的天然气管道为基本条件, 分析 其配套快开盲板因其结构异形复杂、压力高、直径大、温度低和承受冲击载荷大等面临的技术难题。采用有限元分析 与应力测试验证的方法, 通过整机低温性能试验和结构优化、材料优化、发明缓冲装置等创新设计, 研制出OD1422 天 然气管道配套2 台12. 6MPa、DN1550 安全自锁型快开盲板, 通过性能测试与工程应用, 验证了产品的可靠性。

关键词: OD1422 天然气管道; 快开盲板; 研制; 应用