3results about How to "Long term sealing" patented technology

This invention belongs to the field of transmission system sealing technology and proposes a brush-type sealing structure for rotary sealing. It includes an outer retaining ring, an inner retaining ring, a first upper brush fixing ring, a second upper brush fixing ring, a first lower brush fixing ring, a second lower brush fixing ring, an upper brush filament bundle, and a lower brush filament bundle. The outer retaining ring is composed of a side wall and a bottom wall. The inner retaining ring is located in the middle of the side wall of the outer retaining ring. The second upper brush fixing ring is located on the upper surface of the upper surface of the inner retaining ring, and the second lower brush fixing ring is located on the lower surface of the inner retaining ring. The first lower brush fixing ring is located on the upper surface of the bottom wall of the outer retaining ring. The first upper brush fixing ring is located at an opening in the side wall of the outer retaining ring. An upper brush filament bundle is located between the first and second upper brush fixing rings, and a lower brush filament bundle is located between the first and second lower brush fixing rings. This brush-type sealing structure can simultaneously meet the high-temperature sealing requirements of both static and rotating interfaces, significantly reducing the risk of leakage and achieving long-term stable operation of the system.

This utility model discloses a novel sealing structure for a filter unit of a PTA pressure filter, including a filter tank and a filter unit installed inside it. The filter unit includes a filter base, a sealing ring, fixing bolts, a non-asbestos gasket, and a ring gasket. The filter base is installed inside the filter tank, and has a through-hole at its center for allowing filtered liquid to flow out. The sealing ring is embedded in the through-hole of the filter base. The filter tank has a liquid outlet at its center that communicates with the through-hole. A non-asbestos gasket is pressed between the bottom surface of the filter base and the bottom upper surface of the filter tank. The filter base, filter tank, and non-asbestos gasket are fastened together by several fixing bolts. The non-asbestos gasket has a liquid passage hole at its center that corresponds to the through-hole and the liquid outlet, and the wall of the liquid passage hole is covered with a ring gasket. This utility model improves the structure of the sealing gasket to prevent liquid from eroding it.

The utility model relates to ball valve technical field, concretely, it relates to a kind of slurry ball valve based on multistage sealing, including valve body, the both sides symmetry fixed connection of valve body have connecting body, the inside of valve body is provided with ball, the lower end of ball is rotatably connected with fixed shaft, the upper end of inside fixed shaft and ball contact position is provided with steel ball, in the process of frequently opening and closing or adjusting valve, effectively avoid the sealing failure caused by ball and upper valve shaft deviation, increase the positional accuracy of ball, the upper end of ball is fixedly provided with upper valve shaft, the outside of upper valve shaft is provided with packing gland, effectively prevent slurry along valve shaft leakage, the packing gland and upper valve shaft between are provided with sealing packing, the valve seat is arranged between the connecting body and ball, the valve seat one end and connecting body between are provided with baffle ring, form the first core sealing defense line of valve flow channel, improve sealing reliability.