Grouting joint connecting device for coal mine grouting

The invention relates to the technical field of grouting pipe connection, and provides a grouting joint connecting device for coal mine grouting, which comprises an insertion pipe and a conveying pipe, and further comprises two fixing rings, two pull rings, a fixing plate, a pull plate, a locking buckle, a fixing mechanism, a pulling mechanism and a tightening mechanism, by means of the technical scheme, the problems that in the prior art, the manual tightening force has a certain upper limit, when a metal pipe is inserted into a plastic pipe for the first time, the plastic pipe needs to be heated to be soft, the metal pipe is conveniently inserted, and the labor intensity is high are solved. The problems that after a metal pipe is inserted into a plastic pipe, the plastic pipe is cooled and shaped, the phenomena of loosening and separation are prone to occurring after long-time use and twisting, the stability of connection between two sections of grouting pipes is poor, and then the grouting efficiency of a