Check valve with reinforced sealing structure

The invention relates to the field of valves, in particular to a check valve with a reinforced sealing structure, which mainly solves the problems of poor sealing capability and insufficient anti-pressure capability of the check valve in the prior art. The check valve comprises a valve body, a valve cover, a valve clack assembly and a valve seat assembly, wherein the upper end of the valve clack assembly is hinged with the valve body, so that the swing of the valve clack assembly is realized. The valve clack assembly comprises a valve clack body and a cover plate rotatably arranged on the valve clack body, wherein a water permeable hole is formed in the valve clack body, opening and closing of the water permeable hole are achieved through rotation of the cover plate, and an opening and closing mechanism and a sealing mechanism are arranged on the valve seat assembly. When the valve clack assembly is about to be closed, the water permeable hole in the valve clack body is opened through the opening and closing