The utility model relates to the technical field of
butterfly valve seat structures, in particular to a replaceable
butterfly valve seat structure which comprises a valve body and a
flange, the front end and the rear end of the outer wall of the valve body are fixedly connected with the inner wall of the
flange respectively, the top of the valve body is communicated with a
vertical cylinder, and the inner wall of the valve body is connected with a
valve seat structure. The outer wall of the
valve seat structure is connected with the outer wall of the valve body, the bottoms of the front side and the rear side of the
valve seat structure are connected with the fixing structures correspondingly, then the bolt continues to be rotated, the bolt penetrates through the
lantern ring in a threaded mode to be connected with a round opening in an annular groove in the outer wall of the
butterfly valve seat in a threaded mode, and fixing of the butterfly valve seat and the valve body is completed. The
lantern ring achieves the sealing effect between the valve body and the butterfly valve seat through the
rubber material of the
lantern ring, the bolt is screwed towards the outer side to be separated from the butterfly valve seat, then the butterfly valve seat is pushed out of the inner wall of the valve body to complete disassembly, the butterfly valve seat can be replaced, normal disassembly of the butterfly valve seat structure is guaranteed, and normal replacement of the butterfly valve seat structure is guaranteed.