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减压站是长输管道的重要设备之一,根据长输天然气管道的上游压力和下游用户用气量来调整控制阀的开度来保证下游压力的稳定。根据减压站减压阀在香港终端十几年的实际经验,介绍减压站控制阀的结构与工作原理,采用CCI压力平衡型阀、迷宫套筒阀芯减轻产生汽蚀、腐蚀、高噪音和管道振动等现象。介绍运行过程中出现的问题,引起控制阀工作不稳定,分析造成控制阀失效的可能原因,卡滞、内部渗漏、振动噪声、工况改变对阀门的影响,以及预防性维护的策略及故障排除的建议。
Pressure relief station is an important long-distance pipeline equipment, according to the long-distance natural gas pipeline upstream and downstream users with gas to adjust the opening of the control valve to ensure the stability of the downstream pressure. According to the decompression station valve terminal in Hong Kong more than a decade of practical experience, describes the structure and working principle of the control valve decompression station, the use of CCI pressure balance valve, labyrinth sleeve valve core to reduce cavitation, corrosion, high noise And pipe vibration and so on. Describes the problems that occur during the operation, causes the instability of the control valve, analyzes the possible reasons for the failure of the control valve, jamming, internal leakage, vibration and noise, the influence of working conditions on the valve, preventive maintenance strategy and fault Exclusion suggestion.