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为改进已有高能气体压裂气体发生器结构上的缺陷，设计出一种活塞自击式逐级延时引燃装置，该装置既可用于多级同步引燃压裂，又可用来逐级延时燃烧压裂和无需密封的热引燃式压裂，可扩大工艺范围及施工规模、提副曾产增注效果，并有利于套管及水泥环保护等优点．论文对活塞自击点火的可靠性、延时引燃的安全性和药柱保护管的耐压性进行了分析计算，经现场试验证明具有广泛地适用性和先进性．
In order to improve the structural defects of the existing high-energy gas frac gas generator, a piston self-igniting stage-by-stage delay igniting device is designed. The device can be used for multi-stage simultaneous pilot fracturing and stage by stage Delayed burning fracturing and hot sealing fracturing without sealing, can expand the scope of the technology and construction scale, raise the secondary effect has been produced, and is conducive to the advantages of casing and cement ring protection. The reliability of the self-ignite piston ignition, the safety of delayed ignition and the pressure resistance of the cartridge protection tube were analyzed and calculated. The field test proved that it has a wide range of applicability and advanced.