307results about How to "Increase roughness" patented technology

The invention relates to a vehicle abnormal position correction method, system and device based on road network position information and a medium, and the method comprises the steps: collecting and processing road network map information, tracking a vehicle position, and storing the vehicle position as a historical position point set; when the number of the historical position points exceeds a set threshold value, whether the vehicle is in an abnormal deviation state or not is judged according to the scene where the vehicle is located and the relative position relation between the vehicle and the road and road section range; if the vehicle is in the abnormal deviation state, acquiring a latest position point from a historical position point set, and predicting and covering the position of the vehicle; if not, front and back position abnormal state identification is carried out; and when the front and back positions are identified to be abnormal, obtaining the latest position point from the historical position point set, and predicting and covering the position of the vehicle. According to the invention, by fully utilizing and fusing a plurality of data sources, designing an innovative judgment rule and adopting a refined exception handling mode, the accuracy of vehicle position judgment and the fineness of exception handling are remarkably improved.

The invention relates to the technical field of seawater desalination, in particular to a seawater desalination reverse osmosis membrane, a preparation method and application. The seawater desalination reverse osmosis membrane is prepared by the preparation method. The preparation method comprises the following steps: immersing the prepared support layer into a water phase solution, and then taking out the support layer adsorbing the water phase solution; immersing the support layer adsorbing the water phase solution into a first oil phase solution, and forming a primary reverse osmosis membrane through a first interfacial polymerization reaction; then, taking out the primary reverse osmosis membrane, and carrying out first drying treatment under a steam condition; and immersing the primary reverse osmosis membrane into a second oil phase solution, and carrying out a second interfacial polymerization reaction to form the seawater desalination reverse osmosis membrane. The application refers to the application of the reverse osmosis membrane for seawater desalination in the aspects of reclaimed water reuse, seawater desalination and brackish water desalination. According to the invention, the seawater desalination reverse osmosis membrane which simultaneously meets high desalination rate and high water flux can be prepared.

The embodiment of the invention relates to the field of photovoltaic technology, and provides a solar cell and a preparation method thereof, the solar cell comprises a substrate, the substrate is provided with a first surface and a second surface which are opposite, at least one of the first surface and the second surface is provided with a suede, the suede is composed of a plurality of pyramid structures, and the side wall of at least part of the pyramid structures is provided with a wrinkle part; the wrinkle part is composed of a plurality of scaly protrusions, in the direction from the top of the pyramid structure to the bottom of the pyramid structure, the length of the wrinkle part is a first length, the length of the side wall of the pyramid structure is a second length, and the ratio of the first length to the second length is larger than or equal to 0.5. According to the solar cell and the preparation method thereof provided by the embodiment of the invention, the light reflectivity of the solar cell is at least reduced, so that the light conversion efficiency of the solar cell is improved.

The invention discloses a carbon fiber hard felt surface anti-oxidation coating and a preparation method thereof, and the carbon fiber hard felt with an excellent anti-oxidation coating on the surface is prepared by performing three times of coating curing and one time of high-temperature graphitization on a carbon fiber hard felt matrix. Compared with the prior art, the high thermal insulation performance and the excellent surface coating performance of the hard carbon fiber thermal insulation felt are guaranteed, meanwhile, the use frequency of a high-energy-consumption equipment graphitization furnace is reduced, the coating efficiency and the surface coating performance are improved, the whole product period is shortened, and the production cost is reduced.

The invention discloses a windproof and breathable composite fabric and application thereof. The windproof and breathable composite fabric is used for solving the technical problem that in the prior art, the windproof and breathable performance, the wear-resistant and antistatic performance and the washing resistance of a polyester fiber fabric need to be further improved. The preparation method comprises the following steps: putting a gray fabric into a pretreatment solution for pretreatment to obtain a pretreated gray fabric, taking modified quaternary ammonium salt as a cross-linking agent, promoting cross-linking of a polyurethane prepolymer co-blocked by modified polysiloxane and polyethylene glycol, preparing epoxy group-terminated modified polyurethane, and carrying out heat treatment to obtain the pretreated gray fabric. The modified polyurethane and the tetrabutyl titanate are dispersed and mixed in the alkaline emulsion, and the prepared finishing liquid is used for padding and modifying the pretreated gray fabric, so that the windproof and moisture-permeable performance of the composite fabric is effectively improved, and the antistatic performance, wear resistance and pilling resistance of the composite fabric are also improved.

The invention relates to the technical field of batteries, in particular to a single battery and a battery pack. The battery cell provided by the embodiment of the invention comprises a shell, a first electrode terminal, a first electrode assembly and a first tab part, the shell is used for accommodating the first electrode assembly, and the shell is provided with a first wall; the first electrode terminal is arranged on the first wall; the first tab part comprises at least two first tab pieces, the first tab pieces extend out from at least one end of the first electrode assembly, and the first tab part is electrically connected with the first electrode terminal; a first welding mark and a second welding mark are arranged on the first tab part, the orthographic projection of the second welding mark falls into the orthographic projection of the first welding mark along the projection on the large surface of the first tab part, and the second welding mark is used for welding the first electrode terminal and the first tab part; wherein the roughness of the second welding mark is greater than that of the first welding mark. The technical effect of improving the welding strength between the tab and the electrode terminal is achieved.

The invention belongs to the technical field of functional material preparation and application, and particularly relates to a long alkyl chain covalent organic polymer as well as a preparation method and application thereof in oil-water separation. The chemical structure of the long alkyl chain covalent organic polymer is shown as a formula (I), the long alkyl chain covalent organic polymer is successfully loaded on melamine sponge through an impregnation method, and the prepared modified sponge LNU-33 at MS has good hydrophobic and oleophylic characteristics and can be used for separating a mixture of an organic solvent and water. The synthetic process is simple, the oil-water separation efficiency is higher, and the oil-water separation catalyst has a good application prospect in the field of oil-water separation. # imgabs0 #

The paper diaper comprises a skin-friendly layer, a urine absorption product and a liquid-tight bottom layer which are sequentially arranged in a stacked mode, a waistline leakage-proof structure is arranged between the skin-friendly layer and the liquid-tight bottom layer, and the urine absorption product is arranged in an interlayer area between the skin-friendly layer and the waistline leakage-proof structure. The auxiliary core body and the main core body in the urine absorption product contain super water-absorbent resin in different proportions, the layered design is beneficial to rapid absorption of urine and prevention of back seepage, the leakage-proof performance is improved, the liquid-leakage-proof middle layer located at the bottom of the urine absorption product can isolate the main core body from the liquid storage core body, and the leakage-proof performance of the urine absorption product is improved. The main core body can bear a large amount of urine flowing out suddenly, so that the liquid storage core body cannot be polluted and lose efficacy, when the urine absorption product loses efficacy in side leakage prevention, solute concentration between the flow guide core body and the liquid storage core body is not uniform, surface tension changes accordingly, and due to the fact that the surface tension of liquid with different concentrations is different, the urine absorption product cannot be polluted. This may cause the liquid to flow along areas with lower surface tension.

The invention discloses a side-flow type electrolytic machining device and method for sealing a casing cavity, an electrolytic machining machine tool comprises a machine tool rotary table and a machine tool spindle, the electrolytic machining device comprises a clamping assembly, a clamping assembly, a clamping assembly and a clamping assembly, the clamping assembly is used for clamping a casing workpiece and fixing the casing workpiece to the machine tool rotary table, and the machine tool rotary table is connected with the positive electrode of a power source; the cathode assembly is connected with the machine tool spindle and arranged on one side of the cartridge receiver in the radial direction of the cartridge receiver so as to form a machining gap with the outer surface of the cartridge receiver, and the machine tool spindle is connected with the negative electrode of the power source; the sealing assembly comprises a sealing sleeve and a pressing mechanism, the sealing sleeve is provided with an inner cavity, a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are located on the two sides of the sealing assembly respectively and communicate with the inner cavity, and the sealing assembly is arranged on the cathode assembly in a sleeving mode so that the machining end of the cathode assembly can be located in the inner cavity; the pressing mechanism is used for enabling the sealing assembly to be pressed and sealed on the outer surface of the casing so as to seal the inner cavity, and the liquid inlet is used for introducing electrolyte to flow through the machining gap and be discharged through the liquid outlet.

The invention discloses a polyvinylidene fluoride (PVDF) super-hydrophobic membrane and a preparation method thereof.The preparation method comprises the steps that firstly, methyl sodium silicate, perfluorodecyl triethoxysilane (PFDTES) and tetraethoxysilane (TEOS) serve as catalysts / reactants, fluorinated hydrophobic modification is conducted on hydrophilic silicon dioxide (SiO2) nanoparticles, a nanoparticle non-solvent composite spraying synergistic phase inversion method is provided, and the polyvinylidene fluoride (PVDF) super-hydrophobic membrane is prepared. F-SiO2 is successfully introduced into the surface of the membrane, a multi-scale micro-nano structure is formed on the surface of the membrane, and the hydrophobicity and the surface roughness of the membrane are greatly improved. The prepared membrane is applied to vacuum membrane distillation testing, the flux and the salt rejection rate are very excellent, the maximum salt rejection rate reaches 99.99%, the flux is kept at 18.21 kg.m <-2 >. H <-1 > or above, the performance of the super-hydrophobic membrane is superior to that of a base membrane and a membrane prepared through a traditional non-solvent induced phase separation method, and the super-hydrophobic membrane has good anti-pollution performance and is very good in recovery effect after being washed with water.

The invention provides a pole piece, a roll core and a battery, relates to the technical field of batteries, and is used for solving the technical problem that an active material layer at a knurling bulge is separated from a current collector due to the fact that the knurling bulge is arranged on the pole piece in the prior art. The pole piece comprises the current collector, a first active material layer and a second active material layer; the current collector has a first surface and a second surface opposite to each other, the first active material layer is arranged on the first surface, and the second active material layer is arranged on the second surface; a plurality of first convex parts are arranged on the first active material layer, and a plurality of concave parts corresponding to the first convex parts are arranged on the second active material layer; the current collector is provided with a bent part and a flat part, the bent part is located between the first protruding part and the concave part, the bent part is provided with a plurality of second protruding parts, and the second protruding parts are arranged on the first surface or the second surface in a protruding mode. The second protruding parts can increase the contact area between the active material layer and the current collector, improve the bonding strength between the active material layer and the current collector, and prevent the active material layer from falling off.

The invention relates to the technical field of plastic materials, in particular to a high-strength modified plastic product and a preparation process thereof. The preparation method comprises the following steps: uniformly mixing modified carbon fibers, a flame retardant, a photoinitiator and N, N-dimethylformamide, and performing ultraviolet irradiation, washing and drying to obtain a compound; uniformly mixing polyphthalamide, the compound, polyethylene wax, an antioxidant and a nucleating agent to obtain a blend; and carrying out melt extrusion, granulation and injection molding on the blend in a twin-screw extruder to obtain the modified plastic product. The modified plastic product prepared by the invention not only has excellent mechanical properties, but also has excellent flame retardance, and the use safety and durability of the modified plastic product are effectively improved.

The invention relates to a preparation method of a multilayer alloy net electrode for hydrogen production by alkaline electrolysis of water and the multilayer alloy net electrode, and the preparation method comprises the following steps: firstly, selecting an alloy electrode net material, then etching the alloy electrode net, and carrying out electrochemical etching by taking the alloy electrode net as an anode and an inert electrode as a cathode and using 0.5-5M acid liquor to prepare the multilayer alloy net electrode. The preparation method comprises the following steps: sequentially overlapping a first layer of pure nickel net with the mesh number of 80-200 and a second layer of etched alloy electrode net with the mesh number of 40-80 and a third layer of etched alloy electrode net with the mesh number of 20-40, carrying out vacuum sintering at 800-1400 DEG C for 2-5 hours, and finally stirring and drying in a polyethyleneimine aqueous solution. Compared with the prior art, the obtained electrode has the advantages of being low in cost, high in catalytic activity, fast in bubble removal, high in durability and stability and the like, effectively solves many problems of an existing alkaline water hydrogen production electrode, has a wide application prospect in the field of alkaline water electrolysis hydrogen production, can remarkably improve the water electrolysis efficiency and is beneficial to large-scale industrial production.

The invention relates to the field of shoe sole production, and particularly discloses a manufacturing process of an ETPU shoe sole, which comprises the following steps: manufacturing a TPU outsole: cutting a TPU bottom sheet to obtain the TPU outsole; the TPU outsole is laid in an insole forming mold with a line mold cavity, and the insole forming mold is filled with ETPU foaming particles; steam forming is conducted, specifically, steam is introduced into a midsole forming mold, the ETPU particles are formed into the ETPU midsole, the forming pressure is 0.1-0.3 MPa, the forming temperature is 120-160 DEG C, the forming time is 150-190 s, exhausting, water cooling and demolding are conducted, and the ETPU sole is obtained. According to the shoe sole manufacturing process, the TPU material is adopted as the outsole, the outsole and the ETPU foaming particles are integrally formed, the TPU outsole pattern manufacturing procedure is omitted, the TPU outsole and the ETPU insole are high in bonding strength, the outsole and the insole are made of the same material, and the shoe sole is easy to recycle.

The invention belongs to the technical field of cultural relic protection, and particularly relates to a preparation method of an antibacterial hydrophobic coating for stone cultural relic protection. According to the method, an attapulgite / copper-iron prussian blue analogue / silver nano composite material is synthesized by adopting a simple wet chemical method and an electrochemical replacement method, in the preparation process, natural nano rodlike mineral attapulgite is used as a carrier, and prussian blue analogue nano particles are loaded on the surface of the carrier by adopting an in-situ precipitation method; the antibacterial property of the natural mineral material is effectively improved; furthermore, nano Ag is used for modifying the Prussian blue analogue, so that the killing effect of the composite material on bacteria and fungi can be effectively enhanced, the photo-thermal performance of the Prussian blue analogue can be improved, and the purpose of long-acting bacteriostasis is achieved; and finally, carrying out hydrophobic treatment on the coating by using fluorinated silane to obtain the antibacterial hydrophobic self-cleaning coating for protecting the stone cultural relics.

A screen printing plate comprises a screen frame and screen cloth. The screen cloth is arranged in the screen frame and comprises a metal plate, and the metal plate is provided with a scraper face and a pasting and printing face. The surface of the blade surface is roughened to have an average roughness of between 20 nm and 5 [mu] m.

The invention relates to a quick-dry cooling textile integrating flame retardance, antibiosis, radiation cooling and evaporative cooling as well as preparation and application of the quick-dry cooling textile, and belongs to the technical field of functional finishing of textiles. The preparation process is simple, the cost is low, and the prepared textile has good flame retardance, antibiosis, one-way moisture conduction and cooling performance and can be applied to the fields of personal heat management, fire protection, building cooling, antibiosis and the like.

The utility model discloses an anti-slip clamping mechanism for vertical laying of a cable, which relates to the technical field of cable laying and comprises a mounting rack, one side of the top of the mounting rack is provided with a first slot, two rotating shafts are rotatably arranged in the first slot, and the peripheries of the rotating shafts are fixedly connected with first clamping wheels; a connecting frame is fixedly connected to one side of the mounting frame, a second open groove is formed in the side, close to the first open groove, of the connecting frame, a moving frame is slidably arranged in the second open groove, a moving block is slidably arranged on the side wall of the moving frame, a square groove is formed in the top of the moving block, and a plurality of second clamping wheels are rotatably arranged in the square groove. And clamping grooves are formed in the bottoms of the moving block and the mounting frame. According to the utility model, the arrangement of the cleaning block can further clamp and limit the cable, the cleaning block cleans the periphery of the cable and increases the roughness of the surface of the cable during vertical laying, and the first clamping wheel and the second clamping wheel are matched, so that the anti-skid of the cable can be maintained under a small pressure, and the cable is prevented from being clamped too tightly.

The utility model relates to an adapter piece, a top cover assembly and a battery, the adapter piece is used for realizing the connection of an electrode terminal and an electrode assembly, the adapter piece comprises a first surface and a second surface which are oppositely arranged along the thickness direction of the adapter piece, the first surface is used for being connected with the electrode assembly, and the second surface is used for being connected with the electrode terminal; wherein the first surface is provided with a plurality of salient points. According to the utility model, the plurality of salient points are arranged on the first surface of the switching piece, so that the roughness of the first surface can be increased, when the switching piece is connected with the electrode of the electrode assembly through laser welding, the arrangement of the salient points can improve the laser absorption rate during laser welding, and the welding strength of the switching piece can be improved under the condition of lower energy consumption; and meanwhile, the welding surface forming can be improved. In addition, according to the battery provided by the utility model, as the welding strength of the adapter plate is improved, dislocation or physical strength between the adapter plate and the electrode assembly can be avoided, the battery is prevented from being broken, the service life of the battery is prolonged, and the reliability is high.

The invention discloses a battery fire extinguishing agent and a preparation method and application thereof. Preparation raw materials of the battery fire extinguishing agent comprise water, hydrated salts and auxiliary materials, the auxiliary materials comprise at least one of nano-particles or an organic binder, and the mass fraction of the hydrated salts in the preparation raw materials is 10%-80%. The battery fire extinguishing agent contains high-concentration hydrated salts, can effectively inhibit the occurrence of membrane boiling, and can interact with the nanoparticles and the organic binder to remarkably improve the fire extinguishing capacity and the cooling effect of the fire extinguishing agent.

The invention belongs to the technical field of biological filters, and relates to an anaerobic denitrification reactor and a method for accelerating degradation of nitrate nitrogen in micro-polluted water, and the reactor mainly comprises a biological filter, a water inlet tank, a peristaltic pump and a water outlet tank. The biological filter is composed of a filler composed of a modified polyvinylidene fluoride hollow fiber membrane and a high-temperature treatment iron wire, and the wastewater treatment process of the biological filter comprises a biofilm culturing stage and a domestication stage. In the biofilm culturing stage, the activated sludge enters the biofilter along with inlet water, and is loaded on the surface of membrane filaments to form a layer of biofilm; in the domestication stage, the wastewater slowly enters a biological filter and stays in a reactor, iron and nitrate nitrogen in the wastewater are subjected to denitrification reaction under the action of denitrifying bacteria, and the purpose of rapidly removing the nitrate nitrogen is achieved. According to the method, nitrate nitrogen in the wastewater can be rapidly reduced under the condition of not additionally adding a carbon source, so that the treatment process is low-carbon, aeration is not needed, energy is saved, and the method is suitable for industrial popularization.

The invention relates to the technical field of high-performance protective composite materials, in particular to a novel hybrid fiber composite material and a preparation method and application thereof.The novel hybrid fiber composite material comprises an energy buffer layer, a shear protective layer, a tensile reinforcing layer and a deformation energy absorption layer which are sequentially stacked, the energy buffer layer is made of a tough aramid fiber-ultra-high molecular weight polyethylene fiber / TPU composite material, the shear protection layer is made of a high-performance carbon fiber / TPU composite material, the tensile enhancement layer is made of a tough aramid fiber / TPU composite material, and the deformation energy absorption layer is made of a tough ultra-high molecular weight polyethylene fiber / TPU composite material. The novel hybrid fiber composite material has the advantages of light weight, high strength, good wear resistance and good protection performance, and has wide application prospects and market values in the fields of aerospace structural members, high-end equipment, protection devices and the like needing to bear high stress, high impact and complex loads.

The invention relates to the technical field of cable processing, in particular to a cable surface color strip coating device which comprises a rack, a guide assembly, a first coating mechanism and a second coating mechanism. And after the cable sequentially passes through the guide assembly, the first coating mechanism and the second coating mechanism, the advancing path of the cable is changed by the reversing wheel. When the cable passes through the guide assembly, the guide assembly not only can limit the advancing direction of the cable, adjust the tension degree of the cable and stably convey the cable to the first coating mechanism, but also can increase the roughness of the outer surface of a coating layer of the cable. By increasing the roughness of the outer surface of the coating layer, coloring of the outer surface of the coating layer is facilitated. When the cable passes through the first coating mechanism, the first coating mechanism can pre-coat the outer surface of the coating layer. And when the cable passes through the second coating mechanism, the second coating mechanism can re-coat the outer surface of the coating layer. Through primary coating and secondary coating, the coating effect of the color bar can be effectively improved.

The invention relates to a pipeline welding device for laser welding and a welding method.The pipeline welding device comprises a first fixing plate, three air cylinders are arranged on the first fixing plate, the output ends of the air cylinders are jointly provided with a supporting plate, a rack plate is rotationally arranged in the supporting plate, two supporting plates are arranged on the rack plate, and welding arms are installed on the supporting plates correspondingly; under the condition that the air cylinder pushes the pushing supporting plate, the welding arm is adjusted to the gap distance between the two pipelines so as to perform adaptive adjustment; when a joint between two pipelines needs to be welded, the air cylinder can push the supporting plate, so that the welding arm can be gradually close to a gap between the two pipelines, in the process, the welding arm can accurately adjust the gap distance between the two pipelines through the synergistic effect of the rack plate and the supporting plate, and therefore adaptive adjustment is achieved; the welding precision and efficiency are improved, and the whole welding process is more flexible and controllable.

The invention provides a solid electrolyte membrane and a preparation method and application thereof. The solid electrolyte membrane provided by the invention comprises an electrolyte layer and a base material layer, the electrolyte layer comprises a solid electrolyte material and a binder, the base material layer is grafted with one or two or more active functional groups through surface modification treatment, and the active functional groups can be polymerized with the binder to form a cross-linked network; and the binder is an unsaturated binder. According to the solid electrolyte membrane provided by the invention, the electrolyte layer and the base material layer are connected through the cross-linked network formed by polymerization of the active functional group and the binder, so that the strength and the structural stability are improved, and the problem that the base material is easy to fall off because the base material is only in single-sided contact with the electrolyte layer is avoided; the electronic conductivity of the electrolyte membrane can be reduced, and the self-discharge phenomenon can be effectively inhibited. According to the preparation method provided by the invention, the electrolyte layer forms a film independently, large-scale roll-to-roll process production is easier to realize, and the preparation method can be used for a high-energy-density solid-state battery.

The invention discloses a heat-conducting aramid insulation paper-based material as well as a preparation method and application thereof. The preparation method of the heat-conducting aramid insulation paper-based material comprises the following steps: (1) introducing amino groups on the surfaces of boron nitride nanosheets to obtain aminated boron nitride nanosheets; (2) dissolving m-phenylenediamine in N, N-dimethylacetamide, then adding m-phthaloyl dichloride, then adding the amino boron nitride nanosheets, and carrying out a reaction to obtain a heat-conducting aramid polymer solution; (3) performing wet spinning on the heat-conducting aramid polymer solution to obtain heat-conducting aramid fibers; and (4) mixing the heat-conducting aramid fiber and the fibrid, and manufacturing the heat-conducting aramid insulation paper-based material. The amino boron nitride nanosheets are connected with amide groups among aramid macromolecules, so that the interfacial compatibility of the filler and the base material in the paper material is improved, and the strength and the heat-conducting property of the paper material are improved.

The invention relates to the technical field of gas well defoaming, in particular to a membrane defoaming and filtering device which comprises a defoaming tank and a filter element arranged in the defoaming tank, and the outer surface of the filter element is coated with a hydrophilic and oleophobic coating; a water outlet pipe used for discharging filtered water is arranged at the bottom end of the filter element, the end, away from the end connected with the filter element, of the water outlet pipe penetrates through the bottom of the defoaming tank, and a bubble pipe used for leading bubbles in a gas well into the defoaming tank is arranged at the bottom of the defoaming tank. An exhaust pipe used for exhausting gas is arranged at the upper end of the filter element, and the end, away from the end connected with the filter element, of the exhaust pipe penetrates through the top of the defoaming tank. The method has the effect of solving the problem of environmental pollution caused by direct drainage of gas field water.

The utility model relates to the technical field of automobile engine shock absorption, and provides an engine gearbox shock absorber which comprises an aluminum support, a vulcanization body, an aluminum supporting arm and a nylon lower cover, the aluminum support is provided with an installation cavity, and the installation cavity is used for installation of the vulcanization body; top rubber is connected to the two sides of the vulcanization body and used for abutting against the inner side wall of the aluminum support. The aluminum support arm is connected with the vulcanization main body, the nylon lower cover is installed on the aluminum support and connected to the lower end of the vulcanization main body, and the nylon lower cover is used for enabling the upper end of the vulcanization main body to abut against the inner side wall of the aluminum support. The shock absorption effect of the shock absorber is improved.

The invention belongs to the technical field of valve sealing element coating and plating processes, and discloses a special valve hard sealing element dissimilar material coating and plating process which comprises the following steps: S1, surface pretreatment; s2, coating of a bottom layer coating; s3, coating of an intermediate coating; s4, coating of a top layer coating; s5, quality detection and control; the surface pretreatment comprises cleaning, mechanical treatment, acid pickling and passivation, the coating of the bottom coating comprises nickel plating treatment and chromium plating treatment, the coating of the middle coating comprises ceramic coating and coating curing, and the coating of the top coating comprises tungsten carbide coating and coating heat treatment. The quality detection and control comprises coating thickness testing, adhesive force testing, corrosion resistance testing and wear resistance testing. According to the method, a compact and hard ceramic coating is formed through curing treatment, so that the high temperature resistance of the sealing element is improved, and the wear resistance and corrosion resistance of the sealing element are further enhanced.

The invention relates to the technical field of agricultural fertilizers, in particular to a preparation method of a soil improvement type microbial fertilizer, which is used for solving the problems that most of microbial fertilizers are poor in water retention capability and microbial activity, complex in preparation process and high in cost, and the effect of the microbial fertilizers in practical application is restricted. According to the preparation method, various raw materials are reasonably compounded, rich nutritional ingredients are provided for the soil improvement type microbial fertilizer, the load type complex microbial inoculants are added into the soil improvement type microbial fertilizer, the synergistic effect of various beneficial microorganisms can be achieved, and therefore the soil structure is effectively improved, the soil fertility is improved, and plant growth is promoted; the fertilizer has the advantages of good fertilizer holding capacity, degradability and water and fertilizer saving, the yield and quality of crops are finally improved, and the purpose of agricultural ecological environment protection is achieved.