7results about How to "Long-term sealing" patented technology

This invention discloses a vertical cylinder double eccentric ball joint linkage vacuum check valve and method. The check valve includes a valve body, double eccentric valve discs, a valve stem, a valve cover, a vertical cylinder, and a valve disc shaft support. The valve body has a valve seat hole, and the double eccentric valve discs are rotatably mounted on the valve body via the valve disc shaft. An arc-shaped contact surface is integrally formed on the outer side of the valve discs. Balls are embedded at the bottom of the vertically arranged valve stem, and the balls roll in contact with the arc-shaped contact surface. The valve cover is sealed and fixed to the upper end of the valve body. The vertical cylinder is vertically mounted on the valve cover, and its piston rod is rigidly connected to the valve stem coaxially. The valve disc shaft support is symmetrically fixed to the valve body and supports the valve disc shaft. This solution uses a vertical cylinder coaxial drive combined with ball rolling transmission, eliminating the traditional hard top pressure friction and significantly reducing the opening and closing resistance. The double eccentric valve discs rotate stably, and the closing response speed is faster, effectively solving the defects of slow valve closing and severe seal wear in traditional check valves. The overall assembly is stable and suitable for the long-term airtight operation requirements of industrial negative pressure vacuum systems.

This invention relates to the technical field of feeding equipment for internal mixers, specifically to a negative pressure dustproof feeding device for an auxiliary powder feeder in an internal mixer. The device includes a main body, a conveying rigid pipe connected to the middle of the main body, a flange connected to the end of the conveying rigid pipe away from the main body, and a conveying hose connected to the same end via the flange. A feeding gun is connected to the end of the conveying rigid pipe away from the flange. A buffer assembly is provided at the bottom of the flange. The buffer assembly absorbs vibrations caused by negative pressure fluctuations and powder impact at the interface between the conveying hose and the rigid pipe, thereby reducing tensile stress at the flange, reducing flange loosening, ensuring the stability and long-term sealing of the negative pressure inside the conveying hose and rigid pipe, reducing dust leakage, and extending the equipment's service life.

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.

The utility model discloses a chemical enterprise guide rail anti-falling structure which comprises a guide rail, a pulley, a falling differential mechanism, a hook and a sealing ring. The two ends of the guide rail are fixedly connected to anchor points of fixing pieces on the two sides. The pulley is assembled on the guide rail and can slide on the surface of the guide rail; the falling differential mechanism is connected to the guide rail through a pulley and can slide along the line of the guide rail. The hook is arranged below the falling differential mechanism and used for being connected with an operator or other safety systems. The sealing ring is arranged at the joint of the falling differential mechanism and the hook and used for isolating oil-water mixture or acid gas from invading and controlling internal corrosion of equipment.

The utility model relates to building electrical installation engineering technical field, concretely for a kind of building electrical multichannel wiring pipeline device, comprising: pipeline;Threading component, including guide block, clamping block one and wire, guide block is slidably connected with the inner wall of pipeline, the inside of guide block is provided with threading hole, and mounting ring is fixedly connected on the lateral wall of guide block, and mounting ring is located at the entrance of threading hole, clamping block one is set on the lateral wall of mounting ring, and wire is slidably connected with threading hole;Quick-release assembly, including sealing block and sealing gasket, sealing block is slidably connected in the inside of pipeline, and sealing gasket is adhered on the lateral wall of sealing block, threading link is cooperated with auxiliary component by guide structure, realizes wire efficient guidance and stable fixation, reduces threading resistance, while guaranteeing the regularity of wire in pipeline.