高瓦斯隧道作业机械防爆及自诊断功能的实现和应用

Implementation and Application of Explosion Proofing and the Self-Diagnosis Function for Construction Machinery in Gas-Rich Tunnels

针对目前高瓦斯隧道施工机械防爆改装存在的问题,文章依据《柴油车防爆标准》及相关技术规范设计了一种高瓦斯隧道作业机械智能防爆装置。当隧道中瓦斯浓度达到或者超过规范允许的最高浓度时,装置控制作业机械熄火、断电并将作业机械闭锁;当作业机械排气系统温度达到或超过规范规定的最高温度时装置进行喷淋降温,防止排气系统高温点爆瓦斯。同时,为增加装置可靠性,设计了设备故障闭锁、水位异常闭锁以及排气系统温度超限闭锁等三个安全闭锁系统。实践证明,智能防爆装置具有安装快速、使用简捷、运行安全的特点,可以达到防爆的作用。

Based on the anti-explosion standards and technical criterion for diesel vehicles, an intelligent explo- sion-proof device for construction machinery used in gas-rich tunnels was designed to address the problems with modification of construction machinery. The device forces the vehicle to flameout, turn off and lock when the tunnel gas concentration is at or above the allowed maximum concentration. To prevent gas explosions, the device begins to spray when the temperature of the exhaust system is at or above the allowed maximum temperature. Three shutting systems for equipment failure, abnormal water level and exceeding the maximum temperature were designed for the air exhaust system to improve device reliability. Practice indicates that the intelligent explosion-proof device is characterized by rapid installation, easy use and safe operation.