为满足连续管作业机在海上平台、页岩气井场和气化采煤基地等爆炸性气体环境中的安全使用要求，必须对连续管作业机动力橇进行防爆设计。根据国家和石油行业电气设备相关防爆标准和爆炸性环境用内燃机防爆标准，对动力橇用防爆柴油机系统的柴油机本体、进气系统、排气系统与安全保护系统等四大重要组成部分进行了防爆设计，并对这四大重要部分的组成、防爆机理、实施方法进行了总结，同时提出了改进措施，保障了设备和人员安全。防爆动力橇现场应用结果表明，该动力橇能满足油气井场爆炸性气体环境中连续管作业机的安全使用。研究结果可为类似柴油驱动动力设备防爆设计提供参考。

In order to meet the safety requirements of coiled tubing unit in explosive gas environment such as offshore platform, shale gas well site and gas-filled atmosphere of coal mining base, the power pack skid for coiled tubing unit shall meet explosion-proof design requirements. Based on explosion-proof design criteria, the explosion-proof design of the diesel engine system for power pack skid was implemented on the diesel engine body, air intake system, exhaust system and safety protection system. Furthermore, the explosion-proof principle and the integration of the air intake, exhaust system and safety protection system of explosion-proof diesel engine for power pack skid are analysed and summarized in this paper. The field application concludes that the power pack skid can meet the safe operation of the coiled tubing unit in the explosive gas environment at the oil and gas well site. This paper could provide useful reference for the explosion-proof design of similar diesel-engine driven equipments.