Device for detecting air leakage at joint of blast pipes of boiler coal pulverizing system

The invention discloses an air leakage detection device at the joint of air supply pipes of a boiler coal pulverizing system, and belongs to the technical field of boiler coal pulverizing systems. According to the structure of the device, an intercepting plate is arranged in a pipeline, a plurality of vertical pieces are arranged on the front side and the rear side of the intercepting plate, a second half shaft is connected to the left side of the intercepting plate, a first half shaft is connected to the right side of the intercepting plate, a second protective cover is installed on a plurality of inner side fixing rods, and a first protective cover is installed on a plurality of outer side fixing rods; the main installation base is kept within the first protective cover, the auxiliary installation base is kept within the second protective cover, an external driving mechanism is connected with the first half shaft or the second half shaft, and pulverized coal sensors are installed on the first protective cov