Angle-adjustable PE elbow connection device for extracting gas in coal mine

The utility model relates to a part of a device for extracting and draining gas in coal mine, in particular to an angle-adjustable PE elbow connection device for extracting gas in coal mine. The angle-adjustable PE elbow connection device solves the problem that the joint in the prior gas extraction drainage device can not suits multiple positions on site. The angle-adjustable PE elbow connectiondevice comprises an upper elbow and a lower elbow, wherein the upper elbow is socket-connected with the lower elbow; an anti-loosing screw is connected between the upper elbow and the lower elbow; fastening screw caps with the internal thread are respectively sheathed on the outer ports of the upper elbow and the lower elbow; a clamping sleeve is arranged in the thread-free segment of the fastening screw caps; and a seal ring and a clamp ring are arranged between the clamping sleeve and the ports. The structure of the angle-adjustable PE elbow connection device results in lighter weight, whichfacilitates transportatio