A radial sealing assembly, comprising: an upper pressing plate having a plurality of positioning pins, and a first plurality of connecting hooks configured to couple the upper pressing plate to a positioning plate; a protection sheet, the positioning plate having a first plurality of slots configured to receive the plurality of connecting hooks, and a second plurality of connecting hooks configured to couple the positioning plate to a lower pressing plate; a funnel-shaped sealing ring; the lower pressing plate having a second plurality of positioning pins, and a second plurality of slots configured to receive the second plurality of connecting hooks; and a corrugated sealing ring; wherein: the plurality of positioning pins of the upper pressing plate is configured to secure the upper pressing plate to the protection sheet and the corrugated sealing ring by sequentially passing through mounting holes of the protection sheet and mounting holes of the corrugated sealing ring with the protection sheet and the corrugated sealing ring mounted between the upper pressing plate and the positioning plate; the second plurality of positioning pins of the lower pressing plate is configured to secure the lower pressing plate to the funnel-shaped sealing ring by passing through mounting holes of the funnel-shaped sealing ring with the funnel-shaped sealing ring fixed between the lower pressing plate and the positioning plate; the upper pressing plate and the positioning plate are connected together by the connecting hooks of the upper pressing plate embedding in the plurality of slots of the positioning plate, so that a concave-convex engagement structure is formed; and the lower pressing plate and the positioning plate are connected together by the second plurality of connecting hooks of the positioning plate embedding in the second plurality of slots of the lower pressing plate, so that a concave-convex engagement structure is formed. an upper pressing plate having a plurality of positioning pins, and a first plurality of connecting hooks configured to couple the upper pressing plate to a positioning plate; a protection sheet, the positioning plate having a first plurality of slots configured to receive the plurality of connecting hooks, and a second plurality of connecting hooks configured to couple the positioning plate to a lower pressing plate; a funnel-shaped sealing ring; the lower pressing plate having a second plurality of positioning pins, and a second plurality of slots configured to receive the second plurality of connecting hooks; and a corrugated sealing ring; wherein: the plurality of positioning pins of the upper pressing plate is configured to secure the upper pressing plate to the protection sheet and the corrugated sealing ring by sequentially passing through mounting holes of the protection sheet and mounting holes of the corrugated sealing ring with the protection sheet and the corrugated sealing ring mounted between the upper pressing plate and the positioning plate; the second plurality of positioning pins of the lower pressing plate is configured to secure the lower pressing plate to the funnel-shaped sealing ring by passing through mounting holes of the funnel-shaped sealing ring with the funnel-shaped sealing ring fixed between the lower pressing plate and the positioning plate; the upper pressing plate and the positioning plate are connected together by the connecting hooks of the upper pressing plate embedding in the plurality of slots of the positioning plate, so that a concave-convex engagement structure is formed; and the lower pressing plate and the positioning plate are connected together by the second plurality of connecting hooks of the positioning plate embedding in the second plurality of slots of the lower pressing plate, so that a concave-convex engagement structure is formed. the plurality of positioning pins of the upper pressing plate is configured to secure the upper pressing plate to the protection sheet and the corrugated sealing ring by sequentially passing through mounting holes of the protection sheet and mounting holes of the corrugated sealing ring with the protection sheet and the corrugated sealing ring mounted between the upper pressing plate and the positioning plate; the second plurality of positioning pins of the lower pressing plate is configured to secure the lower pressing plate to the funnel-shaped sealing ring by passing through mounting holes of the funnel-shaped sealing ring with the funnel-shaped sealing ring fixed between the lower pressing plate and the positioning plate; the upper pressing plate and the positioning plate are connected together by the connecting hooks of the upper pressing plate embedding in the plurality of slots of the positioning plate, so that a concave-convex engagement structure is formed; and the lower pressing plate and the positioning plate are connected together by the second plurality of connecting hooks of the positioning plate embedding in the second plurality of slots of the lower pressing plate, so that a concave-convex engagement structure is formed.