Method and device for detecting radiant tube deformation outside furnace

The invention discloses a method and device for detecting radiant tube deformation outside a furnace, and relates to a method and device suitable for detecting parts of thermal processing devices, in particular to the method and device for detecting radiant tube deformation of continuous annealing heating furnaces of metallurgy enterprises. The detection device comprises multiple paths of sampling controllers and a data analyzing and processing unit, wherein input ports of the multiple paths of sampling controllers can be respectively connected with air inlet passages and air discharging passages of radiant tubes to be detected through pipelines, and by means of controlling of a selection element of a sampling port, one of the input ports is selected to be communicated with an output port. An air pressure detection signal output end of an air pressure detection element is connected onto an input/output (I/O) port of a central processing unit through an analog-to-digital (A/D) conversion unit, pressure data of