8results about How to "Reduce erosion damage" patented technology

The utility model provides a smart city guiding identification device convenient to install, and relates to the field of smart city equipment. The smart city guiding identification device convenient to install comprises a base and an indication board, the lower surface of the base is fixedly connected with a supporting assembly, the supporting assembly comprises an electric telescopic rod, one end of the electric telescopic rod is fixedly connected to the lower surface of the base, and the other end of the electric telescopic rod is fixedly connected with a supporting plate; and the supporting plate is driven by the electric telescopic rod to move, so that the device can be fixedly mounted. According to the smart city guiding identification device convenient to install, the supporting assembly is arranged on the lower surface of the base, a supporting plate is driven to move through an electric telescopic rod, the device can be fixedly installed, a water tank is lifted away from the ground, erosion damage to the water tank by the road temperature is effectively reduced, and the service life of the device is prolonged; and a solar panel is arranged, and the solar panel is used for manufacturing electric power for the device.

The utility model discloses a direct current relay, comprising a contact system which comprises a movable contact piece and a static contact piece which are matched with each other, and the movable contact piece is contacted with or disconnected from the static contact piece under the driving of a magnetic circuit system of the direct current relay; the arc extinguishing magnetic assembly comprises a special-shaped permanent magnet, and at least one end of the special-shaped permanent magnet is bent towards one side, so that a magnetic field on the bent side forms a magnetic line gathering area; the contact system is configured to be located on the bent side of the special-shaped permanent magnet and arranged corresponding to the magnetic line gathering area of the special-shaped permanent magnet. When the special-shaped permanent magnet is used as a carrier of an arc extinguishing magnetic field, most of the magnetic field generated by the special-shaped permanent magnet is concentrated towards the middle, that is, magnetic lines of force on the arc-shaped inner surface of the special-shaped permanent magnet are high in concentration degree at the central position of a contact and can better correspond to the contact part, so that a good arc extinguishing effect is achieved; in other words, compared with a square permanent magnet, the arc-shaped block-shaped permanent magnet is more beneficial to achieving utilization maximization of an arc extinguishing magnetic field, the initial moving speed of the arc is increased, and the arcing time is shortened.

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 invention provides a green pomelo planting bee luring pollination device which comprises a mobile vehicle body, a raw material assembly is arranged on the rear side of the top of the mobile vehicle body, a fixed seat is arranged on the front side of the top of the mobile vehicle body, a groove is formed in the center of the top of the fixed seat, and two rotating shafts are movably connected to the two sides of the interior of the groove respectively; and a spray pipe is fixed between the two rotating shafts. Compared with the prior art, the device has the following beneficial effects that through the design of the raw material assembly, a water conveying outer pipe in the liquid conveying assembly is inserted into inserting grooves in the bee luring agent box, the first water tank, the second water tank and the agent box, the water conveying outer pipe can be arranged on the outer side of a water conveying inner pipe in a sleeving mode, and the water conveying inner pipe communicates with the interior of the water conveying outer pipe; when the water conveying outer pipe is inserted into the inserting groove, the water conveying outer pipe can trigger the infrared sensor on the inner wall of the inserting groove, the infrared sensor can start the electromagnetic valve in the water conveying inner pipe, the water conveying inner pipe is opened, and liquid conveying work is conveniently achieved.

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 invention discloses a super-hydrophobic high-impermeability cement-based protection system and a preparation method thereof.The preparation method comprises the steps that firstly, existing concrete is pretreated, then the surface of the concrete is densified through capillary crystallization, the internal structure of the concrete is repaired to a certain degree, and the concrete serves as first protection; secondly, on the basis, a high-performance cement-based material is adopted for conducting secondary protection on the concrete structure, and therefore the strength and durability of the concrete structure are improved; finally, active silicon-oxygen bonds in the molecular structure and hydration products of the cement-based material are subjected to a chemical reaction in a silane impregnation mode, stable silane polymers are formed to fill and seal pores in the cement-based material, and the super-hydrophobicity of the high-performance cement-based material is achieved; therefore, various durability such as permeation resistance, freezing and thawing resistance, carbonization resistance and the like of the cement-based material are improved.

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.