Device for detecting gas in cable working well

The invention relates to the field of safety monitoring, in particular to a cable work well gas detection device which comprises a box body used for fixing a negative pressure fan, a telescopic pipe used for being lowered into a well is arranged on the box body, and the telescopic pipe is connected with a suction opening of the negative pressure fan; each telescopic joint of the telescopic pipe is provided with a sensor set so as to obtain temperature, humidity and gas concentration information at different underground depths. According to the method, the underground operation risk can be comprehensively judged, early warning is carried out on workers in advance, and underground safety accidents are avoided. 本发明涉及安全监测领域，具体是一种电缆工井内气体检测装置，包括用于固定负压风机的箱体，箱体上布置有用于下放至井内的伸缩管，伸缩管与负压风机的抽吸口连接；伸缩管的各伸缩节上均布置有传感器组，以获取井下不同深度处的温度、湿度以及气体浓度信息。本发明可综合评判井下的作业风险，对工作人员进行提前预警，避免井下发生安全事故。