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盾构作为地铁隧道施工的主要设备在中国迅速发展,为了保证隧道施工的安全性,盾构诸多系统中的HBW密封系统有着重要的作用。介绍盾构的3种密封,进而提出HBW密封系统的设计原理和PLC控制原理,分析原设计由于没有控制分流器脉冲数的上限,致使实际HBW注入量远远超出理论范围,造成施工方成本的增加与材料浪费。为了能够降低施工成本,使实际HBW注入量控制在理论范围内,提出在HBW密封系统的分流器前增加一气动球阀,设计一集成电路板对其进行控制。集成电路板控制电磁阀两次通电间隔时间(0～99s)和每次的脉冲数(0～99),从而保证HBW注入量可以调节到理论范围内。此系统改进后,经过实际应用,效果良好,能够达到节省盾构施工耗材成本的目的,同时也可供其它盾构的HBW密封系统的改进借鉴。
As the main equipment of subway tunnel construction in China, shield rapidly develops. In order to ensure the safety of tunnel construction, the HBW sealing system in many shield systems plays an important role. Introducing the shield of three kinds of seals, and then put forward HBW sealing system design principles and PLC control theory, analysis of the original design because there is no control of the upper limit of the shunt pulse, resulting in the actual HBW injection far beyond the theoretical range, resulting in the cost of the construction side Increase and material waste. In order to reduce the construction cost and make the actual HBW injection quantity within the theoretical range, it is proposed to add a pneumatic ball valve in front of the splitter of the HBW sealing system and design an integrated circuit board to control it. Integrated circuit board control solenoid valve energized twice (0 ~ 99s) and each pulse (0 ~ 99), so as to ensure HBW injection volume can be adjusted within the theoretical range. After the improvement of the system, the practical application and good effect can achieve the purpose of saving the cost of the shield construction consumables, and can also be used for the improvement of other shield HBW sealing systems.