4results about How to "Reduce erosion damage" patented technology

The utility model discloses a bolt anti-corrosion protective cover structure which comprises a protective cover and a fixing ring, a third cavity for containing a gasket, a second cavity for containing a nut and a first cavity for containing the end of a screw are sequentially arranged in the protective cover from bottom to top, and the third cavity, the second cavity and the first cavity are sequentially communicated. And internal threads are arranged on the inner side walls of the first chamber and the second chamber. The protective cover is reasonable in design, through the design of the protective cover and the fixing ring, the exposed end portions of the gasket, the nut and the screw rod can be completely covered so as to reduce erosion damage to the nut and the screw rod section caused by external humid air, rain and snow and the like, and the protective cover is easy to install and convenient to popularize.

The utility model relates to a fault-free hard sealing butterfly valve with a long-service-life structure, which belongs to the technical field of hard sealing butterfly valves and comprises a butterfly valve body, and a cleaning component is arranged on the butterfly valve body. A collecting assembly is arranged on the butterfly valve body; the cleaning assembly comprises a multi-section telescopic pipe detachably connected with the inner wall of the butterfly valve body. When the butterfly valve is not used, the sealing plate can seal the butterfly plate of the butterfly valve so as to avoid leakage, when the butterfly valve is used, the butterfly plate can extrude the sealing plate, at the moment, the sealing plate can contract under the action of the first spring and the multi-section telescopic pipe so as to avoid rotation of the butterfly plate, and after the butterfly valve is used at the using end, the sealing plate can be extruded by the sealing plate so as to prevent the butterfly plate from rotating. When the butterfly valve is used, a worker can rotate the butterfly plate of the butterfly valve to be in a vertical state, at the moment, the cleaning rod can clean impurities on the butterfly plate under the cooperation of the fixing sleeve, the telescopic sleeve, the second spring, the third spring and the sliding pipe, so that erosion damage to the butterfly plate is reduced, and the service life of the butterfly valve is prolonged.

The application relates to a sand removal cyclone and a sand remover and relates to the technical field of natural gas exploitation.The sand remover comprises a sand separation cylinder which is installed in the sand remover main body in the vertical direction and a middle pipe which is coaxially arranged in the sand separation cylinder, a gas inlet is arranged on the outer periphery of the upper portion of the sand separation cylinder; a connecting flange is fixedly arranged on the outer periphery of the upper end of the middle pipe, the outer edge of the connecting flange is detachably connected with the top surface of the sand separation cylinder, and helical blades which are spirally distributed are fixedly arranged on the outer periphery of the lower portion of the middle pipe; the sand-containing natural gas is injected into the sand separation cylinder through the gas inlet, the sand and the gas are separated after the sand-containing natural gas collides with the inner wall of the sand separation cylinder and is guided by the flow guide assembly, the sand particles are discharged from the lower opening between the sand separation cylinder and the middle pipe, the separated natural gas enters the middle pipe from the lower opening of the middle pipe and is discharged from the upper opening of the middle pipe; in the application, the sand-gas separation process of the sand-containing natural gas is limited in the sand separation cylinder, the high-pressure sand-containing natural gas is prevented from directly impacting the inner wall of the sand remover main body, and the erosion damage of the sand particles to the main body equipment is effectively reduced.

The utility model relates to the technical field of electric wire and cable, and particularly discloses a rat and termite resistant cold resistant flame-retardant electric wire, which comprises an electric wire provided with an electric core, a protective strip arranged circumferentially is arranged on the outer side of the electric core, and a connecting strip is assembled between adjacent protective strips, a plurality of spikes are arranged on the side wall of the protective strip, the gap between the connecting strip and two protective strips is matched to form a retention recess, and a mixed layer is arranged on the outer side of the assembled protective strip and connecting strip. The rat and termite resistant cold resistant flame-retardant electric wire provided by the utility model is assembled by arranging a plurality of connecting strips on the inner side of the protective strip, so that the connecting strips and the protective strip form a whole ring, which is used for protecting the electric core on the inner side and avoiding biological corrosion from invading the inside of the ring to damage the electric core. Meanwhile, the plurality of spikes on the protective strip point outward and can prevent gnawing and biting of rodents, and the mixed layer on the outer side of the spikes can use glass fibers and metal particles to harm the bodies of rodents, thereby reducing the erosion damage of rodents to the electric wire.