Radiant tube inner support pressure test device

The utility model relates to the field of machinery, and provides a radiant tube inner support pressure test device, which comprises a sealing structure, a support structure and an adjusting structure, the sealing structure is arranged at the outer end of the adjusting structure, the support structure is arranged at the inner end of the adjusting structure, and the support structure is simultaneously connected with the sealing structure; according to the utility model, a mechanical lever principle is used, fastening is carried out through friction between the fixing block and the inner wall of the radiant tube, and rapid sealing of the radiant tube is realized through pressing sealing of the cover plate, so that an air tightness test is carried out, the air tightness test and pressure control observation are completed more rapidly, and the whole radiant tube is filled with gas; soapy water is completely smeared on the wall of the outer pipe, so that all-directional dead-point-free detection is realized, and t