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为了实现川气东送与西气东输二线之间直径为813 mm的连络管道不停输连通,需要设计适用于带压开孔工艺的￠813-￠914-￠1 016互连四通。互连四通强度设计符合压力容器开孔补强原理,整体结构近似于“上”字形,四通内配有卡环机构和塞柄机构,能够实现开孔作业后四通的自密封,便于拆除辅助阀门和开孔机具。考虑到管道日常运营中的清管、通球检测需求,设计了透气挡条机构,既确保了开孔后的通透性,又保证了管道内壁的几何完整性,最大限度地减少了开孔对管道的影响。现场应用结果表明:￠813-￠914-￠1 016互连四通实现了不停输连通管道的要求,达到了预期设计目标。
In order to achieve continuous communication between the 813 mm-diameter connecting pipe between the East-West and East-East Gas Pipelines, the ¢ 813- ¢ 914- ¢ 1 016 Interlocking Four-way . The strength of the interconnected four-way design conforms to the principle of reinforcement of the pressure vessel opening. The overall structure is similar to the “upper” shape. The four-way structure is provided with a snap ring mechanism and a plug handle mechanism, which can realize four-way self-sealing after opening operation, Valves and drilling equipment. Taking into account the daily operation of the pipe cleaning, the ball detection needs, designed a breathable barrier mechanism, not only to ensure the permeability after opening, but also to ensure the geometric integrity of the pipe wall, minimizing the opening Impact on the pipeline. Field application results show that: ¢ 813- ¢ 914- ¢ 1 016 Interconnect Stone to achieve the requirements of non-stop transmission pipeline, to achieve the desired design goals.