Concrete pipe

(10) WO2023232101A1

(22) 01.06.2023

(43) 07.12.2023

(57) A concrete pipe, comprising: at least one pipe body (1) extending in a first direction, wherein the pipe body (1) comprises a socket end (11) and a lining plate (12), the socket end (11) is located at the end of the pipe body (1) in the first direction, the lining plate (12) is located on an inner side of the socket end (11), the lining plate (12) comprises an inner wall surface, and the inner wall surface is provided with a sealing groove (121) and a positioning groove (122); and at least one sealing ring (2), wherein the sealing ring (2) is located on an inner side of the lining plate (12), at least part of the sealing ring (2) is coupled with the sealing groove (121), at least part of the sealing ring (2) is coupled with the positioning groove (122), and at least part of the sealing ring (2) protrudes relative to the inner wall surface. The lining plate (12) is provided on the inner side of the socket end (11), and the sealing groove (121) and the positioning groove (122) are arranged on the lining plate (12), such that the structural strength of the lining plate (12) can make up for the problem of the poor strength of the socket end (11) of the concrete pipe, thereby reducing the risk of deformation of the sealing groove (121) and the positioning groove (122), and then reducing the possibility of rolling of the sealing ring (2). By preventing the sealing ring (2) from rolling and sliding, the sealing effect is improved, the reliability of positioning of the sealing ring (2) is increased, and the sealing between the sealing ring (2) and the socket end (11) is also achieved.

(71) Hao, Baishun