Harmful gas monitoring and alarming device for subway tunnel

The utility model discloses a harmful gas monitoring and alarming device for a subway tunnel, which comprises a wall body, one end of the wall body is provided with a storage box, an adjusting assembly is arranged in the storage box, one end of the adjusting assembly is provided with a monitoring and alarming assembly, and the monitoring and alarming assembly is provided with a cleaning assembly close to the periphery of the storage box. Through mutual cooperation of all the mechanisms, dust can be collected and cleaned, the service life of electrical equipment in the monitoring box can be guaranteed, meanwhile, harmful gas in the air can be monitored, and therefore the health of workers can be prevented from being harmed. 本实用新型公开了一种地铁隧道用有害气体监测及报警装置，包括墙体，墙体一端设置有收纳箱，收纳箱内设置有调节组件，调节组件一端设置有监测报警组件，监测报警组件靠近收纳箱四周设置有清理组件，本实用新型通过上述各个机构的相互配合，可以对灰尘进行收集清理，并且还可以保证监测箱内部电器设备的使用寿命，同时还可以对空气中的有害气体进行监测，从而可以避免危害工作人员的健康。