3265results about How to "Avoid cracking" patented technology

The invention provides antibacterial ceramic and a preparation method thereof. The antibacterial ceramic comprises a blank body and a glaze layer, the blank body is prepared from the following raw materials: kaolin, diatomite, montmorillonite, soapstone, bamboo charcoal powder, a first antibacterial agent, a fluxing agent, a pore forming agent, an adhesive and a reinforcing agent; the glaze layer comprises the following raw materials: kaolin, diatomite, dolomite, tourmaline, sodium oxide, a second antibacterial agent, a binder, a stabilizer and a dispersant. The method comprises the following steps: firing a molded green body by adopting stepped segmented heating, and carrying out glaze firing by adopting stepped segmented heating after glazing, thereby obtaining the antibacterial ceramic. According to the antibacterial ceramic disclosed by the invention, the antibacterial agent is added into the green body and the glaze layer, so that the influence on the antibacterial property of the green body in the firing process of the green body is avoided, the antibacterial durability is further improved, the antibacterial effect is enhanced, and the antibacterial rate on pathogenic bacteria such as escherichia coli and staphylococcus aureus reaches 99.99%.

The invention discloses a low-temperature-resistant heat-insulating composite material and a preparation method thereof, and relates to the technical field of composite materials, and the material comprises an outer protective layer, a middle reinforcing layer and an inner heat insulating layer. The inner heat insulation layer is composed of aerogel, polytetrafluoroethylene micro powder and the like, and good heat insulation performance is provided. The middle reinforcing layer contains ethylene-propylene rubber and the like, so that the material is endowed with elasticity, mechanical strength and flame retardance. And the outer protective layer is made of PVC resin and the like, so that the overall strength and wear resistance are enhanced. The low-temperature-resistant anti-cracking additive is prepared from polyimide resin and the like, so that the anti-cracking performance is improved. The modified filler is prepared through a specific method, and the material performance is improved. During preparation, all the layers are prepared respectively and then subjected to hot-pressing compounding. The internal mixer control system guarantees preparation parameter control of the middle enhancement layer, and a PID control algorithm is adopted. The composite material has the advantages of reasonable structural design, synergistic effect of all layers, mature preparation method and process, excellent performances of low temperature resistance, heat insulation, cracking resistance and the like, and is suitable for being applied to various low-temperature environments.

The invention provides a data encryption method and device, a computer program product and a data encryption system. The method comprises the following steps: acquiring initial data and a network transmission rate; according to the network transmission rate, the initial data is segmented to obtain data to be transmitted, and the size of the network transmission rate and the size of a data segment are in positive correlation; performing multi-layer encryption on the to-be-transmitted data to obtain encrypted data; and sending the encrypted data to the target terminal. According to the scheme, the problems that a single-layer encryption method in the prior art is easy to crack and the data security is relatively low are solved.

The invention relates to the technical field of solar cells, and provides a back contact cell, a cell assembly and a photovoltaic system, in the back contact cell, first bus grid lines and first connecting grid lines are continuous at a first edge serial connection area and a second edge serial connection area, the first connecting grid line is located between the two first bus grid lines, and the second connecting grid line is located between the two first bus grid lines. The first insulating layer is arranged on the portion, corresponding to the first edge serial connection area, of the first bus grid line, the second insulating layer is arranged on the portion, corresponding to the second edge serial connection area, of the first connecting grid line, and the first auxiliary connecting line is connected with at least two second grid lines located on the same side of the first bus grid line set. The second auxiliary connecting line is connected with the first bus grid line located on one side of the first connecting grid line and at least one first grid line adjacent to the first bus grid line. Therefore, through special design of the electrode structure, the cold solder joint influence caused by the insulating layer can be reduced or even eliminated, so that the electrical performance of the back contact battery is improved.

The invention relates to the technical field of electric power data acquisition with an encryption function, and discloses an electric power data acquisition terminal with an encryption function and a method. By combining the environment data and the equipment state, the encryption process enhances the security and adaptability of data encryption. Environment and equipment data input ensures that encryption results are different, and potential safety hazards caused by static data sources are avoided. The data are reasonably combined through a seed generation formula, it is ensured that the seeds have enough randomness, and the brute force cracking risk is reduced. The key generation strategy generates a unique key through a seed, so that the attack resistance of the system is improved. The key matrix and random number generation strategy improves the unpredictability of the encryption algorithm. And dynamically updating the encryption matrix to prevent the encryption matrix from being cracked in long-term use. In the whole process, comprehensive protection of the data in acquisition, encryption and transmission is ensured, and the data is effectively prevented from being tampered or stolen.

The invention discloses active brazing filler metal for sealing sapphire and kovar alloy and a preparation method of the active brazing filler metal. The active brazing filler metal comprises 25.0 wt%-27.5 wt% of Cu, 1.0 wt%-6.0 wt% of Ti, 1.0 wt%-5.0 wt% of Al, 0.1 wt%-1.0 wt% of B, 0.1 wt%-0.5 wt% of rare earth element RE, RE is one or more of La, Ce, Sc, Pr, Nd and Er, and the balance is Ag. The preparation method comprises the following steps: preparing silver-based pre-alloying powder by adopting a gas atomization method, mixing the alloy powder with additive element powder in a ball milling manner, sintering by utilizing vacuum pressure to obtain an alloy ingot blank, and carrying out rough rolling, intermediate annealing and finish rolling to obtain an active brazing filler metal strip with the thickness of 0.05-0.2 mm. The active brazing filler metal is well matched with the thermal expansion coefficient of sapphire, direct brazing of sapphire and Kovar alloy can be achieved, the brazing temperature is moderate, and a brazed joint is uniform in structure and free of defects such as air holes and cracks.

The invention relates to a heat treatment method for additive manufacturing of a nickel-based superalloy, and relates to the technical field of additive manufacturing. The heat treatment method comprises the following steps that the additive manufacturing nickel-based superalloy is placed at the first temperature, and first-step stress relief annealing treatment is carried out; and then the temperature is increased to a second temperature for second-step stress relief annealing treatment, and after cooling, the additive manufacturing nickel-based high-temperature alloy subjected to stress relief annealing treatment is obtained. The first temperature is 850-890 DEG C, and the second temperature is 900-950 DEG C; carrying out solution treatment on the additive manufacturing nickel-based superalloy subjected to the stress relief annealing treatment to obtain the additive manufacturing nickel-based superalloy subjected to the solution treatment; and aging treatment is conducted on the additive manufacturing nickel-based superalloy obtained after solution treatment, and the additive manufacturing nickel-based superalloy obtained after heat treatment is obtained. The method is mainly used for improving the volume fraction of the gamma'phase of the additive manufacturing nickel-based superalloy, obtaining the gamma 'phase with high cubic degree and proper size, and eliminating cracking and recrystallization caused by residual stress.

The invention relates to the technical field of civil engineering structure plate deformation joint connection, and discloses a civil engineering structure plate deformation joint connecting device and a using method thereof.The civil engineering structure plate deformation joint connecting device comprises at least two adjacent concrete plates, and a deformation joint is arranged between the concrete plates; the elastic rubber belt is arranged in the deformation joint, and the elastic rubber belt is arranged in the length direction of the deformation joint and used for connecting the adjacent concrete slabs and providing telescopic connection to adapt to thermal expansion and cold contraction or other deformation of the concrete slabs; the supporting structures are located on the two sides of the elastic rubber belt, and each supporting structure comprises a first supporting plate and a second supporting plate. The elastic rubber belts are arranged in the length direction of the deformation joint, flexible connection can be provided between the concrete slabs, thermal expansion and cold contraction or other displacement deformation of the concrete slabs caused by temperature changes and foundation settlement are effectively absorbed through the design, and therefore the situation that the concrete slabs crack or are unstable in structure is avoided.

The invention discloses a wear-resistant tensile power cable and a preparation method thereof, and relates to the technical field of power cables, the wear-resistant tensile power cable comprises a wire core, the interior of the wire core is a stranded wire structure formed by stranding a plurality of copper wires, the exterior of the wire core is coated with a crosslinked polyethylene insulating tube, and a centering assembly is fixedly installed on the outer surface of the wire core. According to the wear-resistant tensile power cable and the preparation method thereof, the hemp rope is filled in the special-shaped pipe for centering and stabilizing the whole structure, the silica gel coating is filled in the special-shaped pipe, an inner layer centering structure is formed after the coating is shaped, and the cable particles easy to flow are filled between the inner side surface of the special-shaped pipe and the special-shaped pipe. The cable particles improve the overall stability of the cable, and at the same time, when the outer layer protection structure is broken by tensile force, the inner layer centering structure is not damaged by tensile force, thereby solving the problem that the tight fixed connection between the outer layer protection structure and the inner layer centering structure of the cable easily causes the overall cable to be broken by tensile force and causes serious accidents.

The invention belongs to the technical field of protective coatings, and provides a polysilazane composite coating as well as a preparation method and application thereof. According to the polysilazane composite coating disclosed by the invention, the elastic polymer is used as a toughening agent, so that the toughening effect on polysilazane can be achieved, and the problem of high brittleness of polysilazane is solved; and by using the flexibilizer, the internal stress of the polysilazane composite coating formed by the polysilazane composite coating can be reduced, and the cracking of the polysilazane composite coating is avoided, so that the polysilazane composite coating can be thickly coated. Alcohol substances and / or ester substances are used as the lubricant, so that the lubricity and wear resistance of the polysilazane composite coating formed by the polysilazane composite coating can be improved. And by using the two-dimensional composite material, the wear resistance and corrosion resistance of the polysilazane composite coating formed by the polysilazane composite coating can be obviously improved, and meanwhile, the polysilazane composite coating can be endowed with a lubricating function.

The invention discloses a negative electrode slurry cracking reduction method, which specifically comprises the following steps: S1, negative electrode slurry formula improvement: on the basis of original raw materials of negative electrode slurry: graphite, a conductive agent, a thickening agent, a binder and deionized water, adding a specific additive-N-methyl pyrrolidone accounting for 0.5% of the total weight of the raw materials; the invention relates to the technical field of battery manufacturing. According to the method for reducing the cracking of the negative electrode slurry, coating cracking is remarkably reduced: by adding NMP in a specific proportion, the problem of coating cracking of the negative electrode slurry is effectively improved, and the yield and quality of a negative electrode plate are improved; the cracking-free negative plate can maintain better structure and performance stability, and is beneficial to improving the overall performance and prolonging the service life of the lithium ion battery; the rejection rate and the rework rate caused by cracking are reduced, and the production cost and resource waste are reduced; nMP is used as a common solvent and is widely applied to the battery manufacturing industry.

The invention relates to the technical field of epoxy resin coatings, and discloses an inorganic composite nano anticorrosive coating material and a preparation method thereof. The inorganic composite nano anticorrosive coating material comprises a component A, a component B and a component C, wherein the component C is obtained by mixing a functional modified inorganic composite nano material and aluminum sorbate; the component A is obtained by mixing modified epoxy resin, a defoaming agent and an anti-settling agent, and the component B comprises a polyamide curing agent. The inorganic composite nano anticorrosive coating material disclosed by the invention has excellent toughness, wear resistance, corrosion resistance, antibacterial and antifouling properties and ultraviolet resistance.

The invention belongs to the field of electrical electronics and advanced non-ferrous metal additive manufacturing, and particularly relates to a preparation method of a laser additive manufacturing copper alloy-tungsten copper composite electrical contact, which comprises the following steps of: preparing a nickel or nickel alloy coating on a copper alloy base material by adopting coaxial powder feeding laser cladding to serve as a middle layer, and then preparing a tungsten copper coating by laser cladding to obtain the copper alloy-tungsten copper composite electrical contact. The composite electrical contact is composed of a pure copper or copper alloy base material layer, a pure nickel or nickel alloy coating and a tungsten copper coating in sequence. The electrical contact obtained by the invention has relatively high electrical conductivity and thermal conductivity, and also has good arc ablation resistance; the copper alloy-tungsten copper electrical contact is prepared by adopting the laser cladding technology, so that the production cost can be effectively reduced, the production efficiency is improved, meanwhile, later maintenance and repair are facilitated, and the method is green and environment-friendly.

The invention belongs to the technical field of metal forming machining, and provides a variable-curvature thin-wall micro-channel structure manufacturing process which comprises the steps that a channel is machined in the front face of a raw material plate, a bottom plate is obtained, and the channel is provided with an arc-shaped protruding groove bottom; diffusing and welding a cover plate on the front surface of the bottom plate to cover the bottom plate to obtain a first prefabricated plate; the back face of the first prefabricated plate is machined to enable the bottom of the channel to be provided with a groove with the same shape as the groove bottom of the arc-shaped protrusion, and a second prefabricated plate is obtained; and the second prefabricated plate is pressed by the mold to obtain the variable-curvature thin-wall micro-channel structure. The thin-wall micro-channel structure is split into a combined structure of the cover plate and the bottom plate, and the variable-curvature thin-wall micro-channel structure is obtained by pressing and forming the cover plate and the bottom plate through a mold after the cover plate and the bottom plate are combined. According to the variable-curvature thin-wall micro-channel structure, the channel is formed in the bottom plate, arc compensation is conducted on the channel of the bottom plate by arranging the arc-shaped protruding groove bottoms according to the different curvatures of the bottoms of all the micro-channels of the variable-curvature thin-wall micro-channel structure, it can be guaranteed that the wall thicknesses of the bottoms of the micro-channels are consistent, and cracking in the profiling process is avoided.

The invention provides an intelligent verification integrated device for an aluminum alloy rear fork, and the device comprises a workbench, the middle part of the workbench is movably provided with two groups of sliding seats, the two groups of sliding seats are symmetrically arranged front and back, the interiors of the two groups of sliding seats are provided with limiting mechanisms, and the interiors of the upper ends of the two groups of sliding seats are provided with second supporting rods in an inserted manner. Front-and-back correction oil cylinders are arranged at the left end of the upper surface of the workbench, front-and-back correction blocks are arranged at the telescopic ends of the two front-and-back correction oil cylinders correspondingly, first supporting rods are inserted into the upper ends of the two front-and-back correction blocks correspondingly, and up-and-down correction blocks are movably installed in the lower ends of the two front-and-back correction blocks correspondingly. Through the up-and-down correction oil cylinder, the first supporting rod and the up-and-down correction block, Z-direction correction can be accurately conducted on a workpiece, through the front-and-back correction oil cylinder, the front-and-back correction block and the second supporting rod, Y-direction correction can be accurately conducted on the workpiece, operation is easy and fast, correction and inspection are integrated, and the percent of pass is high.

The invention relates to the technical field of welding devices, in particular to an aluminum alloy door and window welding machine which comprises a mounting support, an air cylinder is mounted at the upper end of the mounting support, an output shaft of the air cylinder penetrates through the mounting support, and a welding mechanism is mounted on the output shaft of the air cylinder and comprises a first mounting plate fixedly connected with the output shaft of the air cylinder. An exhaust mechanism is mounted on the other side of the first mounting plate, four sets of first electric telescopic rods are mounted on the inner side of the mounting support, clamping mechanisms are mounted on output shafts of the first electric telescopic rods, and welding seams between arc-shaped window frames can be welded through mutual cooperation of second electric telescopic rods and first welding heads; and welding can be conducted on inner side welding seams of the assembling grooves, welding is more comprehensive, connection between the arc-shaped window frames is more stable, through mutual cooperation of a fourth gear and a third electric telescopic rod, comprehensive cleaning is conducted on the peripheries of the welding seams, cracks and bubbles during welding are avoided, and the welding seams are firmer.

The invention discloses a variable-cross-section stacked box rigid frame aqueduct, a cantilever hanging basket and a prestress tensioning method in the field of prestressed concrete aqueducts, the transverse section of a water passing groove is a U-shaped section, and the U-shaped section of the water passing groove is far superior to a rectangular section in the aspects of water delivery flow conditions and flow passing capacity; a prestress continuous rigid frame structure form of a U-shaped water passing upper tank with a variable cross-section rectangular lower tank stacked upwards and a guide groove unified cross section and a two-system four-way prestress system are arranged, the concrete stress of the upstream face of the U-shaped water passing groove can be accurately and effectively controlled to be kept in a uniform compression state with a certain numerical value, and the anti-seepage and durability functions of the aqueduct are ensured. According to the tensioning method, the vertical steel beams and the U-shaped steel beams are partially tensioned firstly, so that the aqueduct web has certain vertical pressure stress, then longitudinal prestress is tensioned, the effect of the vertical steel beams and the U-shaped steel beams is prevented from being weakened by the longitudinal prestress, and pressure stress reserve of the upstream face of the U-shaped groove is guaranteed; the pouring hanging basket prevents the formwork from floating or shifting in the pouring process of the variable-thickness middle partition plate.

The invention discloses pipe orifice reaming equipment for a heat exchange pipe, and relates to the technical field of heat exchange pipe machining, the pipe orifice reaming equipment comprises a machining table main body, a first fixing seat is fixedly mounted on one side of the top of the machining table main body, and a second fixing seat is fixedly mounted on one side, located on the first fixing seat, of the top of the machining table main body. By designing the head expanding assembly, the possibility that a pipe opening of the heat exchange pipe cracks or deforms is reduced, the flaring effect of the heat exchange pipe is improved, a second electric push rod is started to drive a connecting block and an annular fixing plate to move forwards, and an annular connecting plate and a plurality of sets of moving rods are driven to move synchronously; the multiple sets of moving rods slide in the moving grooves in the outer wall of the sleeve to drive the rotating rods on each set of moving rods to rotate, so that the multiple sets of arc-shaped expansion plates are driven to move outwards under the mutual constraint of the T-shaped sliding blocks and the sliding grooves, the pipe opening of the heat exchange pipe is expanded to the designated diameter, workers can conduct flaring according to the actual production requirement, and the production efficiency is improved. And the practicability of the device is greatly improved.

The invention relates to the technical field of power distribution cabinet machining, in particular to a power distribution cabinet assembly automatic bending machining device which comprises a base, a conveying unit is installed at the upper end of the base, a correcting unit is installed on the conveying unit, and a leveling unit is installed on the correcting unit; according to the plate bending and correcting device, the correcting units are arranged to be clamped to the four corners of a plate, so that the bent positions of the front end and the rear end of the plate can be transversely arranged, and then the bent positions of the plate are prevented from inclining; the plates are accurately fed according to the distance between the ends of the plates and the bending machine, so that the bending precision of the plates is improved, and the overall strength of the assembled power distribution cabinet is ensured; according to the flattening device, the flattening plate is arranged to flatten the bent position of the plate under the action of the downward pressing spring rod, meanwhile, the hammering mechanism is arranged to flatten the bent position of the plate, and flattening of the uneven surface of the plate is further guaranteed.

The invention provides a magnesium aluminate spinel transparent ceramic and a preparation method thereof, and the preparation method comprises the following steps: S1, raw material pretreatment, S2, vacuum hot pressing including high and low pressure circulation pressurization; and S3, hot isostatic pressing. According to the preparation method disclosed by the invention, a vacuum hot pressing process of high-low pressure circulating pressurization is combined with a step-by-step cooling and in-situ annealing process of hot isostatic pressing, so that ceramic cracking can be effectively avoided, and preparation of the large-size and high-uniformity magnesium aluminate spinel transparent ceramic is realized.

The invention relates to the technical field of welding, in particular to a battery shell laser welding process method and device.The battery shell laser welding process method comprises the steps that a battery shell joint face is subjected to laser fine tuning treatment, and image data are obtained; obtaining a lattice structure data set of the micro lattices, adjusting the arrangement direction and the grain boundary position of the micro lattices to optimize the lattice structure data set, and obtaining an optimized grain distribution data set; microtopography data in the surface state of the joint face are recognized to obtain surface roughness data, thermal stress simulation analysis is conducted, region division processing is conducted on the thermal stress distribution situation to obtain a thermal stress gradient data set, and the thermal conductivity difference of the joint face is analyzed based on the thermal stress gradient data set to obtain a thermal transfer data set; and the heat transfer data set and the grain distribution data set are combined, optimal laser welding parameters are obtained, and a welding robot is controlled to conduct welding. Welding defects caused by uneven thermal stress in the battery shell welding process are reduced, and the consistency of welding quality is improved.

The invention discloses a flame retardant with a double-layer microcapsule structure, a flame-retardant polyurethane material as well as a preparation method and application of the flame-retardant polyurethane material, and belongs to the technical field of flame retardants. The material is a multifunctional flame retardant with a double-layer core-shell structure, a shell layer is calixarene boric acid resin, a middle shell layer is melamine phthalic anhydride resin, and a core layer is hydroxyapatite modified aluminum hypophosphite. Due to the high cross-linking degree between polymers, the flame retardance of polyurethane is improved, meanwhile, the mechanical property of the polyurethane is improved, and the flame retardance and seawater corrosion resistance of the material are synergistically enhanced through hydroxyapatite dispersed in the core layer. The double-shell layer has excellent hydrophobicity, prevents internal aluminum hypophosphite from being affected with damp and has anti-fouling and self-cleaning effects, and the prepared flame-retardant polyurethane composite material has excellent tensile and flexible characteristics due to a double network of hydrogen bonds and covalent bonds.

The invention provides a tightening, anti-wrinkle and soothing multi-effect integrated functional lipstick. The tightening, anti-wrinkle and soothing multi-effect integrated functional lipstick is prepared from the following components in percentage by mass: 10 to 30 percent of modified polydimethylsiloxane, 0.1 to 2 percent of modified silicon dioxide, 1 to 10 percent of pentaerythritol tetraisostearate, 10 to 35 percent of an emollient, 0.01 to 20 percent of a skin conditioner and 0.1 to 50 percent of an auxiliary agent, wherein the modified polydimethylsiloxane is obtained by copolymerizing hexadecyl methacrylate, vinyl-terminated polydimethylsiloxane and methylacryloylated sodium alginate, and the modified polydimethylsiloxane and the methylacryloylated sodium alginate are co-polymerized; the modified silicon dioxide is obtained by reacting hydroxylated silicon dioxide with alkyl acid. According to the invention, ester groups, alkyl chain segments and the like are introduced into the modified polydimethylsiloxane, so that the modified polydimethylsiloxane has good compatibility with other components, the dispersity and stability of active components can be effectively enhanced, and the effects of tightening, resisting wrinkles, relieving and the like of the modified polydimethylsiloxane are improved.

The invention discloses an injection molding method for a jute fiber board or jute fiber felt. The injection molding method comprises the following steps that S1, the jute fiber board or jute fiber felt is put into heating equipment to be baked and heated; s2, the heated jute fiber board or jute fiber felt is put into an injection mold to be subjected to forming and punching treatment, and a primary finished product is generated; s3, a melt raw material is injected into the injection mold, the structure of the back of the primary finished product is subjected to injection molding, pressure maintaining and cooling are conducted, and a finished product is generated; and S4, ejecting a finished product by the injection mold, and demolding the finished product. According to the method, hot pressing, injection molding and punching are combined, and the jute fiber board or the jute fiber felt can be integrally subjected to hot pressing injection molding to obtain a finished product without special equipment for combining hot pressing and injection molding, so that the production cost is reduced, and the production period is shortened.

The invention belongs to the technical field of coatings, and discloses an anti-yellowing and high-hardness UV (ultraviolet) laminating varnish as well as a preparation method and application thereof. The UV film coating varnish comprises six-functionality alicyclic polyurethane acrylic resin, two-functionality linear polyurethane acrylic resin, pure acrylic resin, an acrylate reactive diluent, a filler, an ultraviolet light absorber, a non-alkaline hindered amine free radical scavenger and a photoinitiator. The weight ratio of the six-functionality alicyclic polyurethane acrylic resin to the two-functionality linear polyurethane acrylic resin to the pure acrylic resin to the acrylate reactive diluent is (2.5-3.5): (1-1.5): 0.5: (2.0-3.0); the bifunctional linear polyurethane acrylic resin is prepared from the following raw materials: isocyanate, poly (1, 4-butanediol) and hydroxyethyl acrylate. A paint film formed by the UV film-coated varnish has good yellowing resistance and high hardness, and is not easy to crack after thermal cycling.

The invention belongs to but not limited to the technical field of welding, and discloses a power modulation galvanometer laser welding method and device for a zirconium alloy fuel rod. A laser beam adopts a circular scanning track for welding along a circumferential weld, the power of 36 phase points in the circular scanning track is adjusted, a gradient power mode that the middle is high and the two sides are low is adopted for welding, a molten pool is stirred through the rotating laser beam, flowing of the molten pool is aggravated, gas escape is promoted, and meanwhile in the power modulation mode, the welding speed is increased. The surface energy distribution of the whole molten pool is more uniform, the power of the edge position of the molten pool is reduced, the weld seam undercut degree is reduced, and weld seam surface forming is more uniform. Three welding production procedures are reduced into two welding production procedures, meanwhile, the rotating speed during fuel rod welding is increased, the welding procedures are optimized, and the welding efficiency is improved; in addition, the problem that oxidation color beside an end plug welding circumferential weld is heavy is solved; and the welding seam air hole defect is improved, and the welding quality is improved.

The invention discloses a self-regulation internal mold system for a prefabricated box girder, and relates to the technical field of prefabricated box girders. A displacement trolley is displaceably arranged at the top of the sliding seat cross beam; the side edge top plate and the side edge bottom plate are assembled by arranging the combined top plate, and the situation that an existing adjusting formwork is difficult to adapt to different widths in the pouring process is avoided by adopting transverse plate overall assembly and sectional assembly; the phenomenon that concrete on the middle side below the bottom film is difficult to vibrate and exhaust is solved through segmented installation, the phenomenon that the concrete flows into the bottom film and is solidified under the cooperation of side edge connecting pieces, and consequently an adjusting joint of a formwork loses efficacy is reduced, and by arranging a sliding base cross beam and a centering support of a displacement trolley, the formwork can be stably adjusted. The load of the side edge top plate is completely transmitted to the sliding seat cross beam through the double-shaft adjusting cylinder assembly, disturbance to concrete below the bottom film is reduced in the pouring process, and cracks are prevented from being formed in the concrete pouring process.

The invention discloses ice glazing liquid for ice glazing of mussels. The ice glazing liquid is prepared from the following components in percentage by mass: 0.1 to 0.12 percent of sodium polyacrylate, 0.05 to 0.07 percent of sodium erythorbate, 0.01 to 0.03 percent of citric acid, 1 to 1.2 percent of sodium lactate, 0.4 to 0.6 percent of alginate oligosaccharide, 0.1 to 0.12 percent of xanthan gum, 7 to 9 percent of propylene glycol and the balance of water. The ice glaze liquid for ice glaze plating of the mussels is reasonable in compatibility, simple and easily available in components and good in adhesiveness, the formed ice glaze is not easy to crack, the dry loss rate can be reduced, and the quality of the thawed mussels can be ensured. The invention further provides a preparation method of the ice glaze liquid for ice glaze plating of the mussels. The preparation method is simple in process step, high in operability and uniform in component dispersion.

The data transmission method based on the service characteristics comprises the following steps that: a partial node acquires data from a central node: the partial node sends a data acquisition request to the central node; the central node queries target data according to the data acquisition request, generates a first key according to a service extraction feature to which the target data belongs, and encrypts the target data with the first key to obtain a first data packet; the central node transmits the first data packet to the partial nodes in a fragmented manner; the sub-node receives all the fragments of the first data packet, then assembles the fragments into the first data packet, generates a second secret key according to the service extraction feature to which the target data belongs, and decrypts the first data packet by using the second secret key; and if the central node and the partial nodes have the same logic according to the business extraction features to which the target data belong, decryption is successful, and the partial nodes obtain the target data. According to the method, the problem that a traditional static key is easy to crack is avoided, the diversity and security of the key are greatly improved, and data encryption is more flexible and safer.

The invention provides a method for stably controlling the surface quality of a high-carbon steel continuous casting billet, which comprises the following steps: high-carbon steel refined molten steel is poured, and the superheat degree of a tundish of the high-carbon steel refined molten steel is 10-25 DEG C; casting powder is added after steel drawing; the pulling speed of the casting is 0.85 to 1.30 m / min; and the high-carbon steel continuous casting billet obtained through pouring is cooled. According to the method for stabilizing the surface quality of the high-carbon steel continuous casting billet, through optimization and adjustment of a production process and cooperation with special casting powder, process parameters such as the pulling speed, the superheat degree and the one-cooling-water slow cooling mode special for the high-carbon steel are formulated, the quality stability of the high-carbon steel is effectively improved, and the percent of pass of the casting billet is increased.