Coal gas analyzer switching device of coal gas recovery system of revolving furnace

The utility model discloses a coal gas analyzer switching device of a coal gas recovery system of a revolving furnace. The coal gas analyzer switching device comprises a blower pipeline 1 and a blower pipeline 2 which are respectively connected with a sampler 1 and a sampler 2, wherein a standby sampler is mounted on a standby blower pipeline and is connected with a sampling gas pipeline and an analyzer 1 respectively through an electromagnetic valve, an external nitrogen gas purging pipeline and an internal nitrogen gas purging pipeline; the standby sampler is connected with the sampling pipeline and an analyzer 2 through the electromagnetic valve. A set of samplers are mounted on the standby blower pipeline; the electromagnetic valves mounted on a blowback pipeline and the sampling pipeline of the standby sampler are connected with the blowback pipelines of the sampler 1 and the sampler 2 and the samplers; the one-key switching is carried out through a relay and a button switch, so that the content of a coa