92results about How to "Increase roughness" patented technology

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 discloses a Z-shaped steel bar tensile test detection fixture for pipeline winding, which comprises two fixture bodies which are identical in structure and mutually clamped, and a mould positioning groove, a mould positioning convex groove, a Z-shaped steel positioning groove and a Z-shaped steel positioning convex groove are arranged on the clamping surface of each fixture body. A connecting convex groove rail is arranged on the outer side face of the clamp body. The tensile experiment detection clamp for the Z-shaped steel bar for pipeline winding is simple in structure, small in size, light in weight, flexible to operate, high in efficiency, time-saving and labor-saving, and very suitable for being installed and used for tensile experiment detection of the Z-shaped steel bar for pipeline winding.

This utility model discloses a novel anti-fouling and anti-water-accumulation brake disc, including a brake disc body and an anti-fouling and anti-water-accumulation component. The brake disc body includes a disc plate, a disc hub, and heat dissipation holes. The disc hub is fixed on the disc plate and securely mounted on the wheel axle with bolts. Several heat dissipation holes are provided on the disc plate. The anti-fouling and anti-water-accumulation component is arranged on the disc plate. The anti-fouling and anti-water-accumulation component includes anti-fouling and anti-water-accumulation grooves and guide grooves. Several anti-fouling and anti-water-accumulation grooves are symmetrically arranged in a ring array on both sides of the disc plate. Guide grooves are symmetrically arranged on both sides of the anti-fouling and anti-water-accumulation grooves. The anti-fouling and anti-water-accumulation grooves have an arc-shaped inclined structure. The inclined direction of the anti-fouling and anti-water-accumulation grooves is opposite to the forward rotation direction of the disc plate. This novel anti-fouling and anti-water-accumulation brake disc has a simple and reasonable structure and ingenious design. Through the centrifugal force generated by the rotation of the disc plate, the dirt and water adhering to the surface of the disc plate can be discharged along the anti-fouling and anti-water-accumulation grooves, ensuring the friction coefficient between the brake pads and the brake disc body and the braking efficiency, and has a good anti-fouling and anti-water-accumulation effect.

Embodiments of the present disclosure relate to methods of improving adhesion of wettable metallized multilayer in an integrated electronic device. A process for forming a silver-containing wettable material structure is disclosed in which, on a metal layer comprising aluminum, a zinc layer is deposited, the zinc layer reacts with the metal layer, and a surface micro-roughness is created; the zinc layer is removed; and a wettable layer comprising silver is deposited by vapor deposition. The wettable layer is formed by an adhesion layer, a barrier layer and a bonding layer, and the adhesion layer comprises titanium or chromium; a barrier layer comprising nickel on the adhesion layer; the bonding layer includes silver on the barrier layer.

The utility model relates to the technical field of cables, in particular to a wire core main body with an anti-falling coating. The utility model relates to a wire core main body with an anti-falling coating. The wire core main body comprises a core wire and a side wire. A plurality of side wires are arranged in the circumferential direction of the core wire, the side wires are uniformly spaced, and grooves are formed among different side wires. The outer layer of the wire core main body is provided with a tin plating layer, and the tin plating layer fills the groove. And a nickel plating layer is arranged on the outer layer of the tin plating layer. The bonding effect of the tin plating layer and the wire core main body is stable, the tin plating layer is protected through the wear resistance of the nickel plating layer, the plating layer of the wire core main body is effectively prevented from falling off, and the stable form of the wire core main body is kept.

The invention belongs to the technical field of copper ore beneficiation, and particularly relates to a method for improving the flotation separation efficiency of micro-fine particle malachite. The method for improving the flotation separation efficiency of the micro-fine particle malachite comprises the following steps that quartz ore powder, malachite ore powder and water are mixed according to the mass ratio of 5: 1: (15-40), and first ore pulp is obtained; and a collecting agent is added into the first ore pulp, the final concentration of the collecting agent is made to range from 50 mg / L to 240 mg / L, and second ore pulp is obtained. Inorganic acid is added into the second ore pulp, flotation is conducted, and copper concentrate is obtained. Wherein the collecting agent is obtained by mixing a mixture of fatty acid, fatty alcohol-polyoxyethylene ether and polyethylene glycol according to the mass ratio of (70-82): (2-10): (8-28). The inorganic acid is selected from any one of sulfuric acid, hydrochloric acid and nitric acid. The mass concentration of the inorganic acid is 5%-25%, and 0.1 mL-0. 7mL of the inorganic acid is added into each liter of ore pulp. According to the method, the separation efficiency of the micro-fine particle malachite and the quartz is remarkably improved, and the copper recovery rate of the copper concentrate reaches 85.14%-86.6%.

This utility model relates to the field of vaporizer technology, specifically a heat exchange vaporization and pressure regulation integrated device, comprising: two frames, with uniformly distributed mounting plates fixedly connected to the inner side of each frame; a liquid inlet pipe at the bottom of one frame and a gas outlet pipe on one side of the frame; a heat exchange structure disposed between the two frames; and a pressure regulating structure disposed on one side of the heat exchange structure. By setting the heat exchange structure, the medium can flow in a spiral shape by setting guide fins inside the heat exchange tube, increasing the flow path and thus prolonging the contact time between the medium and the heat exchange tube, improving the heat absorption time of the medium. Simultaneously, by setting protrusions, the surface roughness of the guide fins can be increased, increasing the turbulence during the medium flow process, thereby improving the heat exchange effect.

The application discloses a preparation method of a high-peeling-strength inner support polyvinylidene fluoride hollow fiber membrane, and comprises the following steps: (1) mixing polyvinylidene fluoride, a hydrophilic pore-forming agent and an organic solvent to obtain a casting solution; (2) coating the casting solution on a modified support tube through a spinning nozzle, then walking vertically downward in the air, and then entering a coagulation bath to be coagulated and formed into a formed piece; and (3) soaking the formed piece obtained in the step (2) in pure water, then placing the formed piece in a mixed liquid of water and glycerol, and then drying to obtain the high-peeling-strength inner support polyvinylidene fluoride hollow fiber membrane. The anti-hook type support tube prepared by using the anti-hook technology has an increased roughness of the surface of the support tube, the casting solution and the support tube can have more contact areas, the adhesion between the membrane layer and the support tube is greatly improved, and the peeling and peeling-off of the membrane layer caused by washing during the operation of a membrane module can be effectively reduced.

The utility model discloses a high-barrier flexible film for packaging a lithium battery. The high-barrier flexible film comprises an aluminum foil layer, wherein a plurality of deformation parts are uniformly distributed on the aluminum foil layer; the outer layer is fixedly connected with the front surface of the aluminum foil layer through an outer bonding layer; the inner layer is fixedly connected with the back surface of the aluminum foil layer through an inner bonding layer; a reinforcing connecting piece is arranged between the outer layer and the outer bonding layer, a reinforcing connecting piece is arranged between the inner side and the inner bonding layer, and the reinforcing connecting pieces are fiber lines. Due to the arrangement of the deformation part, the roughness of the surface of the aluminum foil layer can be increased, so that the connection strength between the inner bonding layer and the aluminum foil layer and between the outer bonding layer and the aluminum foil layer is improved, the layering probability of the aluminum plastic film is reduced, and the barrier property of the aluminum plastic film is improved; due to the arrangement of the fiber lines, the connection strength between the outer layer and the outer bonding layer and the connection strength between the inner layer and the inner bonding layer can be improved, the probability of layering of the aluminum-plastic film is further reduced, and the barrier property of the aluminum-plastic film is further improved.

The application relates to the technical field of photovoltaic solar cells, and discloses a solar cell and a photovoltaic module. The solar cell comprises a silicon substrate, the silicon substrate has a first surface and a second surface arranged oppositely, a medium layer arranged on the second surface, and a doped layer arranged on the surface of the medium layer away from the silicon substrate, wherein the surface of the doped layer away from the medium layer has a plurality of submicron particles. In the application, the roughness of the doped layer can be effectively increased through the plurality of submicron particles on the surface of the doped layer away from the medium layer, the back surface reflection of the cell sheet can be reduced through the submicron particles, the light absorption capacity of the film layer can be improved, and the contact area with metal can be increased, so that the doped layer has better metal contact performance.

This invention relates to the field of wastewater treatment technology, specifically to a microbial preparation, its preparation method, and its application, comprising: a composite microbial agent; and a calcium alginate / polyvinyl alcohol interpenetrating network aerogel carrier loaded with the composite microbial agent; the aerogel carrier contains uniformly dispersed modified nano-attapulgite clay. The microbial preparation of this invention exhibits good wastewater treatment performance and long-lasting effect.

The utility model discloses an anti-impact quantum dot diffusion plate, which relates to the field of diffusion plates and comprises a diffusion plate body, a protective frame is arranged on the side edge of the diffusion plate body, and the diffusion plate body comprises a quantum dot film layer, a diffusion plate layer and a protective layer. According to the scheme, the diffusion plate body, the protection frame, the quantum dot film layer and other devices are arranged to be matched, so that the diffusion plate body can be conveniently protected by the device, collision generated during installation is prevented from directly acting on the diffusion plate body, the diffusion plate body can be protected easily, and the impact resistance of the device can be improved easily; through cooperation of devices such as quantum dot particles, a wrapping layer and a protection frame, the device can conveniently form a layer of uniform protection film on the outer wall of the quantum dot particles, the stability of the quantum dot particles is improved, the influence of external environmental factors such as moisture, oxygen and heat is avoided, and the roughness of the surface of the plate is increased to a certain extent; the impact resistance is improved.

The utility model belongs to positioning device technical field especially is rebound apparatus positioning device for concrete strength detection, including the guide sleeve of rebound apparatus main part, the inside surface of guide sleeve is installed with annular array's support wheel, and support wheel sets up two layers, the end of guide sleeve is fixed with the biaxial digital display inclination instrument for measuring angle, the outer surface of guide sleeve annular array distribution has four support rods, the outside of support rod is rotatably connected with the outer sleeve tube, the outer sleeve tube end sets up screw hole and is screwed with hand screw, and the end of hand screw and the outer surface of support rod contact, increased the stability that guide sleeve moved on rebound apparatus, the angle of guide sleeve is measured to biaxial digital display inclination instrument, thereby the angle of rebound apparatus is adjusted along with guide sleeve, is convenient for adjusting the position of outer sleeve tube, realizes the purpose that guide sleeve angle is adjusted.

The invention relates to the photovoltaic field, and provides a back contact battery and a manufacturing method thereof, a laminated battery and a photovoltaic module, and the back contact battery comprises a battery substrate which is provided with a first surface and a second surface which are opposite to each other; the isolating membrane is positioned on the first surface; the isolating membrane comprises at least two isolating units, the surface, far away from the first surface, of each isolating unit comprises a first area and a second area surrounding the first area, each isolating unit comprises a first part located in the first area and a second part located in the second area, the first part is provided with a groove sunken towards the battery substrate, and the edge, far away from the first part, of the second part is fluctuant; and an electrode on the second surface. The invention is at least beneficial to improving the light absorption and utilization rate of the back contact cell by means of the isolating membrane.

The utility model provides a kind of corona gap adjusting device, comprising: rack, be set to the rack and with the rack form rotating connection's corona roller, fixed in the rack and located the corona roller directly above bracket, fixed in the bracket close to the corona roller one side telescopic mechanism, fixed in the telescopic mechanism close to the corona roller one side ceramic electrode and fixed to the gap measuring device of rack;The ceramic electrode with the corona roller directly opposite and mutually spaced arrangement, the telescopic mechanism is used to adjust the spacing of the ceramic electrode to the corona roller, the gap measuring device is spaced with the corona roller, for measuring the gap size between the ceramic electrode and the corona roller.The utility model's corona gap adjusting device can improve corona effect, increase aluminum foil surface roughness, oil removal effect and surface tension, and gap measurement accuracy.

The invention relates to a graphene sponge composite material and a preparation method and application thereof. The preparation method of the graphene sponge composite material comprises the following steps: mixing a graphene oxide aqueous solution and an alkylamine organic solution to prepare a mixed solution; and soaking sponge in the mixed solution, and adding a reducing agent for hydrothermal reduction reaction to prepare the graphene sponge composite material. According to the preparation method of the graphene sponge composite material, the hydrophobicity and the oil absorbency of the graphene sponge composite material can be effectively improved, so that the separation effect and the separation efficiency of an oil-water mixture are effectively improved.

The invention provides an optical fiber collimator, an MEMS optical acceleration sensor and a preparation method. The optical fiber collimator comprises a self-calibration coupling unit, a self-focusing collimation unit and a light beam steering adjusting unit. The self-calibration coupling unit is provided with an axial inner hole, and the self-focusing collimation unit and the light beam steering adjusting unit are both installed in the axial inner hole and are oppositely arranged. The first end face, facing the self-focusing collimation unit, of the light beam steering adjustment unit is not perpendicular to the axis of the axial inner hole. Light rays incident through the self-focusing collimation unit are reflected by the first end face to be turned and emitted out of the self-calibration coupling unit; the optical fiber collimator integrates the light beam steering and angle adjusting functions, after the system is installed, the direction of the emergent light beam can be optimized in real time by adjusting the light beam steering adjusting unit in the circumferential direction, and the installation difficulty is greatly reduced.

The utility model discloses a combined road surface temporary widening structure for large piece transportation relates to highway engineering technical field, and the purpose is to make the steel plate that lays the road surface wider can be stable under the heavy pressure of vehicle, and the following technical scheme is proposed: including multiple sets of steel plates, multiple sets of steel plates one end is located on the roadbed, and the other end of multiple sets of steel plates is suspended above the recessed area outside the roadbed, and the bottom of each set of steel plates is installed counterweight part away from the side of river course, and the counterweight part is connected with each other, and the counterweight part is arranged in the base groove of roadbed opening. Compared with the mode that the traditional concrete is supported by the aid of the column in the recessed area and is poured, the utility model only needs to dig the base groove on the side away from the recessed area, and the counterweight part is put into and is connected with the steel plate, can avoid the preliminary work such as drainage, dredging under the complex environment, also need not to build construction platform, use professional equipment and technical personnel to pour the concrete, greatly simplifies the construction process, and reduces the construction cost.

The invention discloses a high-temperature fire-resistant heat-insulation carbon fiber composite material which comprises the following components in parts by weight: 35-50 parts of wollastonite-feldspar composite powder, 25-35 parts of modified porous mullite aggregate, 12-20 parts of calcium aluminate cement, 2-8 parts of modified short carbon fibers, 1.5-2.5 parts of sodium dodecyl benzene sulfonate and 1-2 parts of sodium tripolyphosphate. The preparation method comprises the following steps: S1, weighing the wollastonite-feldspar composite powder, the modified porous mullite aggregate, the calcium aluminate cement and the modified short carbon fibers in proportion, and carrying out dry mixing; s2, adding water into sodium dodecyl benzene sulfonate and sodium tripolyphosphate, and stirring to obtain an auxiliary agent aqueous solution; s3, adding the auxiliary agent aqueous solution into the dry powder mixture, and stirring; s4, transferring the slurry into a mold for hydraulic forming; s5, the formed blank is subjected to curing, demolding, drying, high-temperature sintering and cooling, and the high-temperature fire-resistant heat-insulation carbon fiber composite material is obtained. The fire-resistant and heat-insulating carbon fiber composite material produced by the invention can improve the high temperature resistance and compression strength.

This utility model relates to the field of curved glass processing technology and discloses a 3D glass pad printing head that can reduce ink overflow, dimensional deviation, edge chipping, and fragmentation defects in products. It includes a base plate, a pad body, and an elastic pad printing head connected sequentially from bottom to top. The top surface of the elastic pad printing head is a convex arc surface. The top surface of the elastic pad printing head includes a textured anti-adsorption area formed in the middle, an annular ink-taking area surrounding the anti-adsorption area, and an annular ink-separating area located between the textured anti-adsorption area and the annular ink-taking area. The textured anti-adsorption area is provided with a plurality of first elastic ribs arranged side by side along the width direction of the elastic pad printing head and attached to the top surface of the elastic pad printing head, and a plurality of second elastic ribs arranged side by side along the length direction of the elastic pad printing head and attached to the top surface of the elastic pad printing head. The first elastic ribs and the second elastic ribs are intersected and connected to form a mesh structure. At least a portion of the first elastic ribs or the second elastic ribs is higher than the highest point of the top surface of the elastic pad printing head.

The utility model relates to the technical field of coating production equipment, in particular to a microcellular foaming forming machine for a heat-preservation stone-chip-resistant coating. Comprising a mixing stirrer, raw material storage tanks connected with the interior of the mixing stirrer through pipelines, a plurality of metering pumps arranged on the pipelines and in one-to-one correspondence with the raw material storage tanks and a gas introduction device connected with the interior of the mixing stirrer, and a rotating shaft is arranged in the mixing stirrer through a driving device; three layers of blades of a spiral structure are sequentially arranged on the rotating shaft in the axial direction of the rotating shaft, and sawteeth are arranged on the edges of the front ends of the blades. By optimizing the paddle, the efficient stirring and mixing of the coating are realized, and better conditions are provided for foaming, so that the foaming effect of the coating is greatly improved.

The invention provides a coating for castings. The coating comprises the following components: 60-65 parts of modified quartz powder; 3-5 parts of elastic PI particles; 3-5 parts of phenolic resin; 2 to 3 parts of bentonite; 3 to 5 parts of PI chopped fiber; 0.8 to 1 part of CMC (carboxymethyl cellulose); 1 to 1.8 parts of PVA (Polyvinyl Alcohol); 0.2 to 0.4 part of a defoaming agent; 25 to 30 parts of water; the modified quartz powder is obtained by compounding quartz powder with different particle size ranges, the quartz powder with the particle size of 200-350 meshes accounts for 40-50%, the quartz powder with the particle size of 400-600 meshes accounts for 30-40%, and the quartz powder with the particle size of 700-1000 meshes accounts for 10-20%. Through synergistic optimization of the components, the core pain points of drying cracking, high-temperature failure and air hole sand burning of a traditional phenolic resin-based coating are solved, the environment-friendly phenolic resin-based coating has the advantages of being environmentally friendly, compliant and feasible in industrialization, and an efficient solution is provided for research, development and application of high-performance coatings in the casting industry.

The invention discloses a soothing gel composition and a preparation method thereof, and belongs to the technical field of gel. The soothing gel composition comprises the following components based on the total mass of the soothing gel composition: 8.5000% of a humectant; 5.9000% of a skin conditioning agent; 2.0000% of a surface active agent; 0.5300% of a thickening agent; 0.2000% of an astringent; 0.0800% of a preservative; 0.0500% of a repairing agent; 0.0003% of a coloring agent; 0.1130% of a soothing factor; 82.6267% of a solvent; the soothing factor is prepared from an abelmoschus esculentus flower extract, aloe barbadensis leaf juice, a scenedesmus sibiricus extract, a kalimeris crassifolia extract and sclerotium gum; the soothing effect of the soothing gel composition is improved through the synergistic interaction effect of the mallow flower extract, the aloe barbadensis leaf juice, the scenedesmus western extract, the kalimeris crassifolia extract and the sclerotium rolfsii gum.

The application discloses a contact type laser scalpel convenient for speed control, and relates to the technical field of laser scalpel, which comprises a joint, a scalpel head arranged at the bottom end of the joint, and support assemblies symmetrically arranged on the two sides of the scalpel head; the support assembly comprises a spreading part, the spreading part is arranged in an inclined mode, the distance between the two spreading parts gradually decreases in the vertical upward direction, and the top end of the spreading part is hinged to the joint; the bottom end of the spreading part is in contact with human tissue S, and when the scalpel head is pushed down, the bottom ends of the two spreading parts gradually move away to push the wrinkled human tissue S flat. Two inclined spreading parts are symmetrically arranged on the two sides of the scalpel head, when the scalpel head is pushed down, the downward movement of the scalpel head can drive the bottom ends of the two spreading parts to gradually move away, so that the wrinkled human tissue S can be pushed flat, the bleeding part buried in the wrinkles is exposed, hemostasis is facilitated, the whole hemostasis process is short, the speed can be conveniently controlled, and the actual hemostasis efficiency is improved.

The invention provides a three-layer coating antirust process for nanocrystalline soft magnetic powder, which comprises the following steps: adding nanocrystalline magnetic powder into a nitric acid solution for passivating treatment to form a passivation layer on the surface of the nanocrystalline magnetic powder; magnetic powder is added into a coupling agent solution for surface coupling treatment; the preparation method comprises the following steps: adding magnetic powder into a tetraethoxysilane solution, and forming a SiO2 coating layer through a sol-gel reaction; magnetic powder is soaked in the corrosion inhibitor solution to form a corrosion inhibitor layer; and drying to obtain the three-layer coated nanocrystalline soft magnetic powder. The process adopts a process route combining simple acidification, low-temperature sol-gel and solution impregnation, the whole process is carried out at normal temperature or low temperature, the damage of high-temperature treatment to the nanocrystalline structure is effectively avoided, the process conditions are mild, and the operation is simple and convenient; the nanocrystalline soft magnetic powder prepared by the three-layer coating process has excellent corrosion resistance, and the powder does not rust after being subjected to salt mist for 24 hours.

A slope section differential energy dissipation structure belongs to the technical field of hydraulic engineering structures and is characterized in that a bottom plate and at least one group of stilling piers are sequentially arranged on a slope section at the upstream of a stilling pool of a release structure from bottom to top. The stilling piers are arranged in a plum blossom shape, and the whole stilling piers are in a barb body shape perpendicular to the water flow direction. The baffle piers enable water flow to turn and collide with each other behind the piers, so that turbulent fluctuation of the water flow is increased, the water flow is divided into a plurality of small water strands, flow velocity distribution is adjusted, the water flow is discharged group by group, friction with the water flow is increased, roughness of a slope section is increased, energy is dissipated along a flow space, energy dissipation efficiency is improved, and downstream scouring of hydraulic structures such as gate dams and the like can be improved. The scouring damage of discharged water flow to the stilling pool, the apron and the riverbed is relieved, the efficient energy dissipation effect is achieved, and the requirements of engineering safety and the like are met.

A method for preparing shell-modified biochar cementitious materials is disclosed. This method aims to address the technical problems of low biochar content, decreased compressive strength at high biochar content, and poor durability in existing traditional biochar cementitious materials. The method comprises: 1. Pretreatment of agricultural and forestry waste and shell waste; 2. Preparation of shell-modified biochar; 3. Mixing 5-30 parts by weight of shell-modified biochar, 55-80 parts by weight of ASTM Type I ordinary Portland cement, and 15 parts by weight of metakaolin, followed by mixing with 40 parts by weight of water to obtain a slurry; then molding and curing to obtain the final product. The compressive strength of this cementitious material is 39-60 MPa, which is 8%-58.5% higher than that of traditional biochar cementitious materials; the water absorption rate is 17%-18.5%, which is 12.5%-15% lower than that of traditional biochar cementitious materials, making it suitable for use in road and building materials.

The application relates to a preparation method of a polyamide composite nanofiltration membrane containing a graphdiyne intermediate layer and application thereof, and belongs to the field of membrane separation and technology. The polyamide composite nanofiltration membrane contains a porous substrate, a graphdiyne intermediate layer and a polyamide layer. The graphdiyne is selected from graphyne, graphdiyne, hydrogen-substituted graphdiyne and other graphdiyne derivatives. The specific preparation method is as follows: a graphdiyne dispersion liquid is suction-filtered onto a porous substrate, is respectively immersed in an aqueous phase and an oil phase, interfacial polymerization is carried out to generate a polyamide membrane, finally, the membrane is dried in a constant-temperature and constant-humidity oven, and a polyamide composite nanofiltration membrane containing a graphdiyne intermediate layer is obtained. The preparation method is simple and efficient, the prepared composite membrane can effectively intercept divalent salts and organic matters in water, and has excellent water permeability, ion separation and antibiotic desalination effect.

The utility model relates to the field of buildings, in particular to a multifunctional heat shielding coating structure. Comprising a base layer, an anti-crack coarse mortar layer, a first primer layer, an aerogel heat insulation floating coat, an aerogel primer layer and a heat reflection heat insulation coating layer which are sequentially arranged from inside to outside. The utility model provides a multifunctional heat shielding coating structure which can reduce the cracking and falling risks of a coating and improve the heat insulation performance.

The present application relates to the technical field of 3D printing concrete, and discloses a preparation method of 3D printing concrete mixed with plant fibers, which comprises the following steps: step 1, soaking and drying the plant fibers treated with water glass in saturated limewater; step 2, blending the plant fibers with sulphoaluminate cement; step 3, preparing alkali-activated 3D printing concrete and pumping it by taking 30-50 parts of water glass, 20-40 parts of sodium hydroxide, 100-200 parts of limestone powder, 1000-1200 parts of sand, 100-200 parts of extra-fine sand, 400-500 parts of mineral powder, 50-150 parts of rice husk ash, 20-40 parts of hydroxypropyl methyl cellulose, 220-300 parts of water and 5-10 parts of water reducing agent according to mass fraction; step 4, forcibly stirring the concrete and adding the product obtained in step 2; and step 5, printing the concrete and spraying a setting agent between the concrete layers. The present application helps to improve the constructability of 3D printing concrete and reduce its shrinkage.