Saddle joint with positioning structure for plastic inspection well

The utility model relates to a saddle joint with a positioning structure for a plastic inspection well. The saddle joint comprises a saddle body, a press ring and a nut, wherein the press ring sleeves the saddle body, the nut is connected with the saddle body, the press ring is pressed, a longitudinal positioning groove is formed in the saddle body, a positioning block is arranged in the press ring, the press ring sleeves the saddle body, the positioning block is embedded in the positioning groove, and the mounting position and arc of the press ring on the saddle body are limited by the matching of the positioning block and the positioning groove. Compared with the prior art, the saddle joint has the advantages that the positioning groove is formed in the saddle body, and the positioning block is arranged on the press ring and is matched with the positioning groove, so when the press ring is arranged in the saddle body, the positioning block is embedded into the positioning groove, the stop function is realized, the arc surface of the press ring is guaranteed to be effectively attached to the arc surface of a well cylinder, and the sealing property of the product is guaranteed; the structure is simple, the sealing property is good, the mounting is convenient, and the working time is saved.