Multifunctional connecting pipe for floor drain structural layer

The invention discloses a multifunctional connecting pipe for a floor drain structural layer, which is used for connecting a floor drain with an embedded pipe and comprises an inner pipe and an outer pipe, the outer diameter of the pipe wall of the inner pipe is slightly smaller than the inner diameter of the embedded pipe, the thickness of the pipe wall is the same as that of the embedded pipe, and inner pipe wall holes are formed in the periphery of the pipe wall of the inner pipe in a segmented mode. An outer pipe wall hole is formed in the position, corresponding to the inner pipe wall hole, of the outer pipe; the outer pipe is a thin-walled pipe, the outer pipe and the inner pipe form a gap cavity, the gap cavity comprises a cavity layer and a filter gauze cavity layer, the area between the inner pipe wall hole and the outer pipe wall hole is the filter gauze cavity layer, and a partition plate is arranged between the filter gauze cavity layer and the cavity layer. An outer pipe of the cavity layer is stripped from the multifunctional connecting pipe, the pipe is inserted into the embedded pipe for connection, the upper end of the pipe is connected with the floor drain, it is guaranteed that a lower opening of the filtering cavity layer is flush with the top face of the structural plate, at the moment, air pressure and accumulated water in the structural layer can be discharged through the filtering cavity layer, and the engineering quality is guaranteed.