33results about How to "Reduce corrosion wear" patented technology

The invention discloses an iron-based nanocrystalline composite coating for protecting a boiler tail heating surface and a laser-cladding forming process of the iron-based nanocrystalline composite coating. The iron-based nanocrystalline composite coating comprises the following components in percentage by weight: 49.9-62.8% of Fe, 14.2-20.4% of Cr, 9.0-16.3% of Mo, 2.9-4.1% of B, 0.6-1.3% of C, 1.0-2.4% of Mn, 3.4-8.0% of W, 1.0-1.9% of Si and 0-3.9% of RE, wherein RE is a rare earth element. The forming process comprises the following steps: preparing alloy powder of the iron-based nanocrystalline composite coating; treating the surface of the boiler tail heating surface; preparing the iron-based nanocrystalline composite coating through a simultaneous powder feeding method and a laser-cladding method, wherein the laser cladding is performed for multiple times. The formed iron-based nanocrystalline composite coating is 1 mm above in thickness. The iron-based nanocrystalline composite coating can obviously enhance the wear resistance and corrosion resistance of the boiler tail heating surface, and reduce maintenance costs of worn and corroded parts and consumption of raw materials of a power plant.

The invention belongs to the technical field of fuel, and particularly relates to coal-based biofuel for a vehicle. The coal-based biofuel is prepared from the following raw materials in percentage by mass: 35 to 45 percent of fatty acid methyl ester, 10 to 15 percent of alcohol and the balance of hydrogenization coal tar; the total mass percentage is 100 percent. The coal-based biofuel for the vehicle has the advantages that the raw material matching is simple; crude oil resources are not needed; diesel oil can be replaced for hundred percent; the hexadecane number is high; the thermal value is high; the power is strong; the combustion is sufficient; the tail gas exhaust quantity is low; all technical indexes reach or exceed the national standard.

The invention relates to a 5G wireless network card with a protection function and firm plug-in connection. The 5G wireless network comprises a main body, a USB connector, a connecting mechanism and aprotection mechanism. The connecting mechanism comprises a moving ring, an elastic rope and two adsorption assemblies. Each adsorption assembly comprises a suction pipe, a transmission rod, a pistonblock and a suction cup. The protection mechanism comprises a protection cover and two connection assemblies. Each connecting assembly comprises a moving block, a spring, a connecting line and a strip-shaped hole. According to the 5G wireless network card with the protection function and firm plug-in connection, the wireless network card is adsorbed on a computer through the connecting mechanism,the stability of connection between the wireless network card and a computer is improved, and the practicability of the wireless network card is improved; through the protection effect of the protection mechanism, abrasion and corrosion of the USB connector are relieved, the service life of the USB connector is prolonged, and the practicability of the wireless network card is further improved.

The invention relates to a mold for vertical stepped pouring of a rotary kiln burner. The mold includes five segments, namely, mold I, reducing mold II, mold II, reducing mold II and mold III from front to rear from the end of the rotary kiln burner, wherein the mold I is positioned at the end of the burner, and the end of the mold I is chamfered to 45 degrees, the reducing mold I is connected with the mold I, the mold II is connected with the reducing mold I, the reducing mold II is connected with the mold II, and the mold III is positioned behind the reducing mold II until the rear of the burner. The invention further relates to a vertical stepped pouring method of a rotary kiln burner, using the mold herein.

The invention discloses a Cr plating hanger of inner holes of cylinder sleeve, composed of anode, cathode guide rod, anode insulating sleeve, primary guide ring, and clamp ring and screw of cylinder sleeve, where the anode insulating sleeve is set with top power line shield cap, the bottom end of the anode is set with bottom power line shield disc, the anode is set with holes, the outer diameter at the bottom end of the anode is less than that on the top, there is an anode positive sleeve fixed with the cathode outside the top of the anode, there is a gas roundabout cavity formed between the top power line shield cap and the primary guide ring. It has the characters of fixed position of cathode and anode, high plating efficiency, accurate positioning cylinder sleeve, a little deformation, etc.

The invention relates to a foldable positioning plate for a reamer, and belongs to the technical field of reamer positioning. According to the foldable positioning plate for the reamer, a main plate and an inner plate are connected through a hinge, and the main plate and a lower plate are connected through a hinge. When the positioning plate is unfolded, the main plate and the inner plate are connected through a fixing plate, and the main plate and the lower plate are connected through a fixing plate. When the positioning plate is folded, the inner plate is connected and attached to the main plate through the hinge, and the lower plate is connected and attached to the main plate through the hinge. The lower edge of the inner plate is provided with an arc boundary, a check plate is arranged, a distance is kept between the check plate and the arc boundary of the lower edge of the inner plate, and the boundary of the inner plate is provided with a rib plate. The main plate is provided with an arc positioning boundary, a check plate is arranged, a distance is kept between the check plate and the arc positioning boundary, and a rib plate is arranged on the boundary of the main plate. The inner edge of the lower plate is provided with an arc boundary, a check plate is arranged, a distance is kept between the check plate and the arc boundary of the inner edge of the lower plate, and the boundary of the lower plate is provided with a rib plate. The foldable positioning plate has the advantages that the structure is simple, on-site construction is achieved, disassembly and assembly are convenient, conveying is convenient, and the positioning precision is high.

The invention discloses a cathode steel bar structure capable of reducing horizontal current of molten aluminum for an aluminum electrolysis cell. The cathode steel bar structure comprises a first cathode steel bar (strip-shaped), a second cathode steel bar, a third cathode steel bar (U-shaped) and separation layers for separating the three cathode steel bars. The cathode steel bar structure is integrally embedded into the bottom of a cathode carbon block, one end of the cathode steel bar structure is embedded into the position, close to the middle section of the cathode carbon block, of the cathode carbon block, and the other end of the cathode steel bar structure is provided with an electricity outlet end which extends and exceeds the corresponding side face of the cathode carbon block. According to the cathode steel bar structure, a separation layer is arranged between two adjacent cathode steel bars, the three cathode steel bars are separated by the separation layers, and the top surfaces of the three cathode steel bars are arranged in a step shape. According to the cathode steel bar structure, the horizontal current density in a molten aluminum layer of the aluminum electrolysis cell is greatly reduced, only the structural configuration of the cathode steel bars and the cathode carbon block is adjusted, the structure is simple, and industrial implementation is easy.

The invention provides an isocyanate derivative as well as a preparation method and application thereof and a lubricating grease composition. The structure of the isocyanate derivative disclosed by the invention is shown as a formula (I), wherein an R group is selected from C1-C30 alkylene groups; the R'group is selected from alkyl of C1 to C30; the A group is selected from a group shown in a formula (II) and a group shown in a formula (III); in the formula (II), R ''groups are selected from alkyl groups, cycloalkyl groups or aryl groups of C1 to C30, R'' groups are selected from alkyl groups, cycloalkyl groups or aryl groups of C1 to C30, and R ''groups are selected from alkyl groups, cycloalkyl groups or aryl groups of C1 to C30; in the formula (III), the R ''group is selected from C1-C30 alkyl, cycloalkyl or aryl. The isocyanate derivative has excellent extreme pressure anti-wear performance and can be used as a thickening agent of a lubricating grease composition or an additive of lubricating grease, the lubricating grease composition prepared by taking the isocyanate derivative as the thickening agent has excellent extreme pressure anti-wear performance, and the service life of lubricating grease can be prolonged.

The invention discloses a protection device and a protection method for a filtering rotary drum of a centrifugal machine. The protection device comprises special-shaped protection sleeves positioned in filtering holes of the filtering rotary drum of the centrifugal machine, a filtering hole protection sleeve is arranged in each special-shaped protection sleeve, the shape, size and thickness of each filtering hole protection sleeve are matched with those of the filtering holes, the filtering hole protection sleeves are embedded in the filtering holes, the area of each special-shaped sheath is larger than and can only cover one filtering hole, and is attached to the outer wall of a cylinder body of the filtering rotary drum. The special-shaped protective sleeves are embedded in the filtering rotary drum holes to protect the cylinder body holes and the metal outer wall of the filtering rotary drum, the cylinder body of the filtering rotary drum can be effectively protected, abrasion and corrosion of the cylinder body are relieved, the outer wall of the cylinder body is covered with the shape and arrangement of the protection device to the maximum extent, the filtering holes and the wall of the rotary drum are protected, and the filtering hole protection sleeves are in the shape of a cone which is gradually reduced in the outward extending direction of the rotary drum hole, so that liquid thrown out of the filtering rotary drum can be effectively prevented from splashing to the outer wall of the rotary drum, and the abrasion of the rotary drum is further reduced. The protection device is simple in structure and remarkable in protection effect.

The invention provides an isocyanate derivative as well as a preparation method and application thereof and a lubricating grease composition. The structure of the isocyanate derivative disclosed by the invention is shown as a formula (I), wherein the definition of each group is shown in the specification. The isocyanate derivative has excellent extreme pressure anti-wear performance and can be used as a thickening agent of a lubricating grease composition or an additive of lubricating grease, the lubricating grease composition prepared by taking the isocyanate derivative as the thickening agent or the additive has excellent extreme pressure anti-wear performance, and the service life of lubricating grease can be prolonged.

The invention provides an isocyanate derivative, a preparation method and application thereof, and a lubricating grease composition containing the isocyanate derivative. The structure of the isocyanate derivative disclosed by the invention is shown as a formula (I), wherein the definition of each group is shown in the specification. The isocyanate derivative has excellent extreme pressure anti-wear performance and can be used as a thickening agent of a lubricating grease composition or an additive of lubricating grease, the lubricating grease composition prepared by taking the isocyanate derivative as the thickening agent has excellent extreme pressure anti-wear performance, and the service life of lubricating grease can be prolonged.