4results about How to "Protective seal" patented technology

The utility model relates to pipeline maintenance and repair technical field, concretely discloses a kind of automatic extraction maintenance device of water in natural gas pipeline, including the shaft seat of being provided with flange, further including the leather bowl installed to the outside of flange, lip is opened in leather bowl side edge, and lip divides leather bowl side edge to form front lip and back lip, multiple guide members are rotationally arranged in lip. The utility model actively meets the sewage accumulated in front of natural gas pipeline through front lip, and the space of lip realizes the storage obstruction in front of back lip, so that sewage is not easy to penetrate from back lip to rear leather bowl, improve the use effect of entire pipe cleaner, by adjusting the roller deflection in the axis direction of leather bowl side edge, so that multiple rollers on leather bowl roll along one spiral direction, facilitate the spiral progression of pipe cleaner in natural gas pipeline, realize the change of leather bowl side edge direction, avoid the positioning of leather bowl side edge in some place always buried in sewage operation, and further protect the sealing of pipe cleaner.

This utility model discloses a sealing protective cover for a chemical centrifugal pump, including a sealing protective plate. The sealing protective plate is integrally stamped and formed. The sealing protective plate has mounting holes, a sealing pipeline through hole, and an observation hole. The sealing protective plate is installed on both sides of the bearing housing. The sealing protective plate and the bearing housing are detachably connected by screws. The sealing protective plate has a bending angle. This utility model solves the problems of exposed rotating parts at the sealing point, insufficient rigidity, poor pressure bearing capacity, difficult disassembly, and inconvenient equipment maintenance in the prior art.

The utility model discloses a kind of automobile wiring harness waterproof structures, including wiring harness main stem, branch wiring harness, elastic inner liner and outer sheath, elastic inner liner is covered in the outer periphery of wiring harness main stem and branch wiring harness, and its inner wall is attached with the surface of wiring harness main stem, branch wiring harness;Outer sheath coaxial sleeve is arranged in the outside of elastic inner liner, and sealing cavity is formed between the two, the radial thickness of elastic inner liner is greater than the radial width of sealing cavity in natural state, so that elastic inner liner is continuously in axial compression state, the both ends of outer sheath are radially inwardly extended and set with limit flange, for constrain the axial displacement of elastic inner liner, elastic inner liner is integrally formed as Y-shaped bifurcation structure, and its bifurcation inner cavity is matched with the profile of branch wiring harness;The utility model is through multilayer, dynamic self-adapting sealing structure, fundamentally solve the problem that traditional protection is in long-term dynamic environment, especially branch node place sealing is unreliable, moisture is easily penetrated and accumulated.

The invention provides a fan-shaped glasses valve plate disengaging structure which comprises a left valve body, a valve plate and a lead screw, two ejector rod mechanisms are arranged on the left valve body, a base plate is arranged on the side, close to the left valve body, of a guide rail of the valve plate, and a clamping ring is arranged on the lead screw on the other side of the valve plate. The ejector rod mechanism, the base plate and the clamping ring are utilized, the valve plate is forcibly disengaged when the valve plate acts, the ejector rod mechanism and the clamping ring limit the valve plate, the valve plate is prevented from shaking left and right, and therefore the effect of protecting the rubber sealing ring is achieved.