15results about How to "Won't crack" patented technology

The invention discloses a light heating super-hydrophobic coating and a preparation method thereof, and relates to the technical field of hydrophobic paints.The light heating super-hydrophobic coating is composed of a modified fluorosilicone resin solution, a modified nanoscale carbon-based material, a functional additive, polypyrrole resin, an adhesion promoter and the like. The preparation method comprises the following steps: firstly, preparing fluorosilicone resin, introducing a benzoxazine monomer into a structure as an anticorrosive resin matrix to prepare a modified fluorosilicone resin solution, introducing a photo-thermal layer by adding a modified carbon-based material, and preparing a sprayable super-hydrophobic coating by combining hydrophobic silicon dioxide, a filler aid and the like; according to the coating, the characteristics of light energy conversion through lattice vibration of carbon black and carbon nano tubes and hydrophobicity of nano silicon dioxide are utilized, and polypyrrole is added into a resin system, so that the light heating performance of the coating and the ground surface energy of fluorine and silicon elements are further guaranteed, and benzoxazine resin is subjected to ring opening polymerization; and the coating has excellent corrosion resistance, wear resistance, weather resistance and the like.

The invention provides a preparation method of a PEM water electrolysis anode diffusion layer, which relates to the field of PEM water electrolysis. Titanium nanotubes with different pore sizes are selected, and the large-pore titanium nanotubes are used to transmit liquids, and the small-pore titanium nanotubes are used to transmit gases, so that the gas and liquid transmission in the PEM water electrolysis process is highly ordered, and good liquid and gas management functions are achieved; the surfaces of the titanium nanotubes and titanium powders are attached with noble metal ions, and then oxygen is introduced for calcination, so that the noble metal ions form an oxide grid structure and are attached and embedded in the surfaces of the titanium nanotubes and titanium powders, which has higher firmness, protects the titanium material from being oxidized in the water electrolysis process, and improves the conductivity and catalytic ability of the anode diffusion layer.

The utility model discloses a 35kV ultralow-temperature cold-resistant power cable, which comprises a conductor, three co-extrusion insulating layers are wrapped outside the conductor, a copper belt and a polyester belt are sequentially wrapped outside the three co-extrusion insulating layers, a halogen-free low-smoke environment-friendly cold-resistant polyolefin protective layer is extruded to form a wire core, and the three wire cores are twisted into a cable. A first glass fiber tape is sequentially wrapped outside the cable core, a halogen-free low-smoke environment-friendly cold-resistant polyolefin inner protective layer is extruded on the outer side of the first glass fiber tape, a steel wire armor layer is adopted for armoring, a second glass fiber tape is wrapped outside the steel wire armor layer, and an outer protective sleeve is wrapped on the outer side of the second glass fiber tape. According to the utility model, all materials forming the cable have the halogen-free, low-smoke, flame-retardant and environment-friendly characteristics while the cold-resistant requirement is met, so that the safety of the cable is greatly improved, and the cable has excellent cold resistance and low-temperature toughness and can be used for a long time in high and cold, dry, windy and strong ultraviolet environments.

The present application relates to a kind of thin-walled cylinder welding forming process and welded thin-walled cylinder, it is mainly used for metal thin-walled cylinder welding and post-welding treatment process to prevent welding deformation too large.Wherein, thin-walled cylinder diameter (50-1500) mm, cylinder wall thickness range is (0.5-20) mm.Rational welding process is used to solve the problem that product is scrapped due to serious welding deformation.Product processing verification shows that the welding forming control process meets the welding quality requirements of the thin-walled cylinder, and better solves the technical problem of large welding deformation during the welding process of thin-walled cylinder, so that the roundness requirement of the entire thin-walled cylinder assembly after welding is not more than 0.3mm.

The invention relates to the technical field of building construction, in particular to a limiting aluminum alloy double-groove type guide rail which is arranged on the outer wall face of a building, and a wall attaching support is arranged on a climbing frame. The limiting aluminum alloy double-groove type guide rail comprises a guide rail body, a heating system, a refrigerating system, a controller and an even number of temperature sensors. Every two temperature sensors are distributed on the guide rail body and the outer wall face in pairs. A temperature adjusting groove is formed in the guide rail body. A plurality of first pipelines and a plurality of second pipelines are arranged in the temperature adjusting tank; the heating system is communicated with the first pipeline; the refrigerating system is communicated with the second pipeline; the positions of an existing limiting aluminum alloy double-groove type guide rail and the wall-attached support are exchanged, so that the overall weight of the climbing frame is reduced, the load is reduced, cost is reduced, and safety is improved; the temperature sensors are arranged in pairs, and the heating system and the refrigerating system are combined for heating or refrigerating, so that the guide rail body and the outer wall surface are synchronously expanded and shrunk.

The utility model discloses an anti-deformation connecting structure of a prefabricated water channel, which comprises a plurality of linear steel bars embedded in the wall thickness of the prefabricated water channel on one side of a joint, and the linear steel bars are exposed out of the end face of the prefabricated water channel on the side. A plurality of linear pre-embedded sleeves in one-to-one correspondence with the linear steel bars are pre-embedded in the wall thickness of the prefabricated water channel on the other side of the splicing position, the linear pre-embedded sleeves are not exposed out of the end face of the prefabricated water channel on the side, and the prefabricated water channels on the two sides of the joint position are connected with the linear pre-embedded sleeves in an inserted mode through the linear steel bars; the linear steel bars are telescopically inserted and connected into the linear embedded sleeves, and joints of the prefabricated canal are filled with asphalt mastic. The problem of dislocation and deformation caused by uneven settlement of the prefabricated water channels on the two sides of the joint can be solved, water leakage is avoided, and unsmooth drainage is avoided.

The invention discloses a water-based heavy anti-corrosion coating for construction with rust and residual paint films. The coating comprises an ionic water-based modified alkyd emulsion, water-based fluorocarbon resin, deionized water, an anti-rust pigment, a filler, an anti-flash rust agent, a salt spray resistant auxiliary agent, a self-repairing auxiliary agent, a penetrant, a corrosion inhibitor, a thixotropic agent and an auxiliary agent. The coating contains the anti-rust pigment, the filler, the flash-rust inhibitor and the salt-spray-resistant additive, the four components interact with each other and can act on the steel surface and rust left on the surface to generate a stable chelate passivation layer and a complex, and the product is strongly attached to the steel surface in the form of physical bonds and chemical bonds to form a good insoluble protective film, so that the corrosion resistance of the coating is improved, and the service life of the coating is prolonged. The rust inhibitor can stabilize rust and prevent rust, inhibits the corrosion process, realizes construction with rust, and has the advantages of safety, environmental protection, construction with rust and residual paint film and the like.

The barrier packaging container comprises a body and a sealing cover, the body is provided with an opening, the sealing cover is arranged at the opening of the body, the body comprises a body base paper layer, a body bonding resin layer, an aluminum-plated PET layer and a body heat-sealing resin layer, the aluminum-plated PET layer is arranged between the base paper layer and the heat-sealing resin layer, and the body bonding resin layer is arranged between the aluminum-plated PET layer and the heat-sealing resin layer. The bonding resin layer is arranged between the base paper layer and the aluminized PET layer, the sealing cover comprises a cover base paper layer, a cover bonding layer, an aluminum foil layer and a cover heat-sealing layer, the aluminum foil layer is arranged between the cover base paper layer and the cover heat-sealing layer, the cover bonding layer is arranged between the base paper layer and the aluminum foil layer, and the cover heat-sealing resin layer and the cover heat-sealing layer are bonded together. The packaging container has the following beneficial effects that the aluminized PET is adopted in the body for sealing and blocking, the aluminum foil is adopted in the cover body for sealing and blocking, the aluminized PET and the aluminum foil cannot crack during film spraying treatment, and the sealing integrity can be ensured.

This invention provides a power distribution unit and a charging device. The power distribution unit includes: a plurality of distribution components arranged sequentially along a first direction; each distribution component includes a circuit board and a plurality of onboard relays; the circuit board extends along a second direction, and each onboard relay is disposed on the circuit board; the second direction is perpendicular to the first direction; a bus assembly including a plurality of first busbars and a plurality of second busbars, the first busbars crossing at least one distribution component and connecting one end of each onboard relay located in different distribution components, the second busbars connecting the other end of each onboard relay located in the distribution component to connect or disconnect current loops through the onboard relays; an outer frame including at least two side frames arranged along the second direction; the two ends of the circuit board in the distribution component along the second direction are inserted and fixed to the corresponding side frames along a third direction. This power distribution unit has the advantages of small size, low cost, and convenient maintenance.

The invention provides glass powder, dielectric paste and a thick film heating body. The glass powder is prepared from the following raw materials in percentage by weight: 15 to 40 percent of B2O3, 15 to 40 percent of MgO, 20 to 50 percent of CaO, 7 to 20 percent of SiO2 and 0.1 to 8 percent of glass powder additive, wherein the total weight of the raw materials of the glass powder is 100 percent. Based on the total weight of the dielectric paste being 100%, the dielectric paste comprises 55-80% of the glass powder, 0-5% of cobalt blue, 8-35% of an organic carrier, 3-15% of a diluent, 0.5-3% of an inorganic additive and 0.2-1% of an auxiliary agent. The invention also provides a thick film heating body prepared from the dielectric paste. A dielectric layer formed by the dielectric paste is compact, free of cracking, high in binding force with stainless steel, good in breakdown voltage resistance and excellent in electrical property.

The invention discloses silicon-doped zinc oxide varistor composite powder and a preparation method thereof, and belongs to the technical field of preparation of electronic ceramic materials. The method adopts a silane hydrolysate as a dispersing agent of a zinc oxide varistor formula material, and comprises the following specific steps: hydrolyzing silane in an acidic alcohol-water mixed system to obtain a stable silane hydrolysate, then adding the zinc oxide varistor formula material into the silane hydrolysate, dispersing and grinding, and finally carrying out spray granulation. The silicon-doped zinc oxide varistor composite powder prepared by the method can be pressed and molded without adding an organic adhesive, and a zinc oxide varistor with good comprehensive performance can be obtained.

The invention discloses a hollow porous positive electrode material precursor, a preparation method thereof and a lithium ion battery. The hollow porous positive electrode material precursor provided by the invention comprises a hollow core and a porous shell, and the surface of the porous shell contains hydroxyl. The inner core of the hollow porous positive electrode material precursor has a high cavity structure, and the shell has more highly open three-dimensional pore channels, so that the lithium ion propagation path can be shortened to a certain extent, and the discharge capacity and the energy density at the hollow porous positive electrode material end can be improved. In addition, after the surface of the porous shell is subjected to hydroxylation modification, metal active sites can be increased, and intercalation and deintercalation of lithium ions are enhanced.

The invention relates to the technical field of welding, and discloses a semiconductor thin-wall stainless steel cavity welding process which comprises the following steps: step 1, expanding size quantity of prepared products, reserving welding shrinkage quantity, and carrying out quantity quantity on a side plate, a bottom plate and an upper opening flange part of a cavity; 2, tailor welding and spot welding are conducted on the side plates and the bottom plate, the bottom plate and the upper opening flange and the cooling water channel and the side plates, and a blank is obtained; 3, rigidly supporting the blank body obtained in the step 2; 4, welding parameters are set, and the side plate, the bottom plate, the upper opening flange and the cooling water channel obtained in the step 3 are welded to obtain a cavity; and 5, carrying out tempering heat treatment on the cavity in the step 4. According to the welding process, the influence of welding shrinkage deformation is reduced, the welding quality is improved, rigid support is added before welding, the strength is improved, welding deformation is reduced, tempering heat treatment is adopted after welding, the welding residual stress of a cavity welding seam is eliminated, and the machining precision of a product after welding is improved.

The present application relates to incinerator explosion-proof technical field, especially a kind of incinerator body explosion-proof device, the upper end of explosion-proof top cover is communicated with pipe, the bottom end of fixing mechanism is connected with explosion-proof clamp for furnace body explosion-proof;Explosion-proof clamp includes two parallelly arranged connecting strips, one end of each connecting strip is slidably connected to the bottom end of fixing mechanism, the other end of each connecting strip is slidably connected with recessed column, the bottom end of each recessed column is fixedly connected with clamping plate, two clamping plates are connected with fixing bolt for locking.This application is fixed by fixing bolt through two clamping plates, two clamping plates protect furnace body from explosion, when furnace body explodes, furnace body will not crack under the protection of clamping plate, explosion-proof top cover is always at the upper end of incinerator body under the fixation of explosion-proof clamp, waste gas and sundries produced by explosion enter explosion-proof top cover, avoid waste gas and sundries to scatter into air.

The utility model provides a clamp for local gold plating of a cylindrical electro-optical switch crystal. The clamp comprises an installation clamp and a protection clamp. The installation clamp comprises a clamp body and an installation head arranged on the first side end face of the clamp body, the installation head is of a cylindrical protruding structure arranged opposite to the end face of the clamp body, and one side of the second side end face, opposite to the first side end face, of the clamp body can be installed on a workpiece disc. The protection clamp is in a circular ring shape and can be arranged on the outer wall of a to-be-gold-plated crystal in a sleeving mode, and the length of the protection clamp is equal to that of a non-gold-plated area of the to-be-gold-plated crystal. The non-film-coating area of the crystal is protected by the protection clamp, the size is accurate and neat, and the method is better than manual line drawing and is protected by an adhesive tape.