Grouting joint connecting device for coal mine grouting

The grouting joint connecting device for coal mine grouting comprises a first fixing plate, the interior of the first fixing plate is in threaded connection with the outer sides of two symmetrical threaded rods, one end of each threaded rod is fixedly connected with a clamping plate, a second fixing plate is arranged on one side of the first fixing plate, an auxiliary assembly is arranged on the second fixing plate, and a grouting pipe is arranged in the first fixing plate. A conveying pipe is arranged in the second fixing plate, a heating assembly is arranged on one side of the first fixing plate, and a fastening assembly is arranged on one side face of the first fixing plate. The outer side of the conveying pipe is heated through the heating assembly, the thermal expansion uniformity of the conveying pipe is ensured, the connecting effect of the conveying pipe and the grouting pipe is improved, the problem that it is difficult for constructors to insert the conveying pipe into the outer side of the grouting