Oil gas recovery cover for dimethyl carbonate conveying pipe

The utility model relates to an oil gas recovery cover for a dimethyl carbonate delivery pipe, which belongs to the technical field of oil gas sealing, and comprises a top cover, the top cover is a cylindrical shell, the top cover comprises a mounting groove and a plug body, the plug body is positioned at the central position of the mounting groove, an adjusting component is arranged on the circumferential side wall of the top cover, and the adjusting component is positioned in the mounting groove. The adjusting assembly comprises a rotary drum and a flange plate, the rotary drum is a cylindrical drum body, a first thread is formed in the circumferential inner wall of the rotary drum, a second thread matched with the first thread is formed in the circumferential side wall of the top cover, the flange plate is arranged at the end, close to a notch of the mounting groove, of the rotary drum in a sleeving mode, and the flange plate is rotationally connected to the circumferential side wall of the rotary drum. Th