2145 results about "Galvanization" patented technology

The invention discloses a machine vision-based intelligent detection method for steel galvanized surface defects, which comprises the following steps: S1, acquiring and preprocessing a steel galvanized surface image to obtain a standardized image; s2, constructing a specular reflection probability graph according to the brightness distribution and the gradient magnitude, and calculating a reflection intensity value; s3, calculating a structure tensor matrix, determining a main direction angle and an anisotropic consistency coefficient, and generating a direction feature matrix; s4, establishing a multi-scale direction adaptive phase kernel function, and performing phase modulation in a frequency domain by adopting an improved phase stretching transformation algorithm; s5, inverse Fourier transform is executed, and a phase response matrix is extracted; s6, performing weighted fusion to obtain a comprehensive phase response diagram; and S7, setting a threshold value according to the noise variance and the statistical characteristics, executing binarization and morphological processing, and outputting a defect region and boundary coordinates. According to the invention, high-precision identification and boundary positioning of steel galvanized surface defects are realized.

The invention discloses a gradient welding strength control method and system for a welded galvanized steel pipe for fire fighting, particularly relates to the technical field of welding automation control, and aims to solve the problem of abnormal welding seam strength gradient caused by instantaneous unbalance of an electric field and a thermal field during dynamic parameter switching in the prior art. Electromagnetic distortion characteristic quantity is extracted through frequency domain energy analysis, and thermodynamic offset state quantity is deduced in combination with a thermal diffusion trend; on the basis of frequency band correlation mapping of electromagnetic and thermodynamic parameters, thermoelectric cooperative imbalance levels are divided through mutual information entropy evolution, and a self-adaptive harmonic attenuation weight tuning instruction is generated; analyzing a mismatching relation between transient disturbance of an environment magnetic field and arc voltage modulation distortion in real time, dynamically generating a magnetic field compensation factor and reversely superposing the magnetic field compensation factor to a control instruction; and in combination with the matching degree of molten pool oscillation energy and a harmonic frequency spectrum, correcting wire feeding rate calibration, reconstructing a multi-band harmonic energy proportion spectrum, outputting an anti-interference welding control signal, and realizing dynamic balance between arc stability and molten pool heat input.

The invention discloses a galvanized steel sheet blanking and shearing device and a working method thereof, and relates to the technical field of shearing devices. According to the galvanized steel sheet blanking and shearing device and the working method thereof, the galvanized steel sheet blanking and shearing device comprises a shearing machine main body, a lower shearing knife arranged on the shearing machine main body and an upper shearing knife vertically arranged on the shearing machine main body, a dynamic material supporting mechanism is arranged on the shearing machine main body, and the dynamic material supporting mechanism comprises a first rotating seat and a second rotating seat, and the two first rotating seats are arranged on the shearing machine main body. Through the design of the dynamic material supporting mechanism, accurate dynamic material supporting of a sheared steel plate is achieved, and the problems of shearing opening size deviation, stress concentration and the like caused by the fact that the steel plate droops due to gravity in the existing shearing process are solved; the material supporting assembly synchronously ascends at the moment of shearing, it is ensured that the steel plate is supported in time, and falling deformation or impact on equipment is avoided.

The invention relates to the technical field of steel pipe hot galvanizing, in particular to steel pipe hot galvanizing automation equipment and a galvanizing technology.The steel pipe hot galvanizing automation equipment comprises a zinc liquid pool, a second horizontal moving part is fixedly arranged on one side of the zinc liquid pool, placing tables are arranged on one side of the second horizontal moving part at intervals, and the upper ends of the placing tables are in threaded connection with blocking strips through bolts; a moving assembly is arranged above the molten zinc pool, a stirring assembly is arranged on the outer surface of the moving assembly, a deslagging assembly is arranged at the upper end of the molten zinc pool, first electric telescopic rods are detachably connected to the two sides of the molten zinc pool through supports, push plates are fixedly arranged at one ends of the first electric telescopic rods, and an air blowing part is arranged on one side of the molten zinc pool in a penetrating mode. Through the arrangement of the moving assembly and the slag removal assembly, automatic hot galvanizing of the special-shaped steel pipe is achieved, automatic removal of zinc slag on the surface of zinc liquid can be achieved, through the arrangement of the moving assembly, the stirring assembly and the first electric telescopic rod, residues of the zinc liquid can be reduced, and the possibility of zinc tumor occurrence is reduced.

The invention relates to the technical field of steel plate hot-dip production, and discloses an intelligent scheduling system for a steel plate hot-dip production process. The system comprises a working condition sensing module which is used for continuously collecting steel belt inlet temperature, zinc liquid component concentration fluctuation data, air knife pressure time sequence parameters and roller system operation state signals of a galvanizing pot area; the feature extraction module receives the working condition data flow, analyzes the steel strip surface temperature field distribution features and the zinc liquid viscosity change rule, and generates a process feature spectrum; the parameter optimization module dynamically adjusts membership function parameters and rule base weight coefficients of the fuzzy reinforcement learning controller according to the process characteristic spectrum, and outputs an optimized plating layer control parameter set; the self-adaptive plating layer control module generates a plating layer thickness control instruction based on the real-time zinc liquid temperature parameter and the optimized plating layer control rule set; and the dynamic roller system scheduling module realizes global cooperative control of the roller system speed based on the instruction. The system can realize intelligent scheduling of the steel plate hot-dip production process.

The invention provides a grounding grid intelligent operation and maintenance system based on digital twinning and computer equipment. A multi-factor coupled corrosion kinetic equation is generated based on a laboratory grounding grid steel sheet accelerated corrosion test, and the corrosion kinetic equation is used for predicting the instantaneous corrosion rate of a galvanized steel sheet and estimating the mass corrosion loss of the steel sheet within specified time; combining the corrosion kinetic equation with the simulation model to establish a steel sheet corrosion data set, and training a physical information neural network to construct a corrosion prediction physical model; training the corrosion prediction physical model by adopting a neural network regression algorithm; constructing a grounding grid digital twin model by taking the corrosion prediction physical model as a base and combining field environment monitoring data; defining a Markov decision process in the digital twin environment of the grounding grid; and based on the feedback and reward function of the digital twin model of the grounding grid, training by adopting a near-end strategy optimization algorithm to obtain an intelligent decision-making body, and continuously optimizing the decision-making of the intelligent decision-making body through an online fine tuning function.

The invention relates to the technical field of laser cutting equipment, and discloses galvanized coiled plate cutting equipment which comprises a mounting frame, a guide rail structure, a cutting structure, a conveying structure, an intercepting toothed plate, a slag removal fan and a discharging structure. The cutting structure comprises a cutting seat, a laser cutting head, a separated protective cover, the intercepting toothed plate, the slag removal fan and the discharging structure; the separated protective cover is formed by splicing a plurality of splicing covers. Each splicing cover comprises an outer cover plate, an inner air box, a limiting plate, a limiting spring and an air supply hose. When the device is used, high-pressure air is blown out of the inner air box to form a protective air curtain on the splicing cover, the annular air cover and the laser cutting head, and therefore the situation that slag splashes and is intercepted, and zinc steam adheres to the splicing cover, the annular air cover and the laser cutting head can be prevented; and air is forced to be discharged along the cutting seam by the closed space formed by the separation type protective cover, so that the blowing force of the airflow to the lower edge of the notch is enhanced, and the adhering slag can be forcibly stripped.

The invention relates to the technical field of steel-cored aluminum stranded wires, and provides an overhead high-conductivity steel-cored aluminum stranded wire which comprises a galvanized steel core and aluminum wires stranded on the surface of the galvanized steel core, the galvanized steel core is formed by stranding 19 steel wires, and the aluminum wires are divided into two layers and stranded on the outer side of the galvanized steel core; the preparation method of the galvanized steel core comprises the following steps that after being galvanized, a steel wire is added into a passivation solution to be passivated, and the galvanized steel core is obtained after drying and twisting; the passivation solution is prepared from the following raw material components: waterborne acrylic resin, nickel nitrate, sodium carboxymethyl cellulose, sodium dodecyl sulfate, functionalized single-walled carbon nanotubes and water; the functionalized single-walled carbon nanotube is prepared from the following raw materials: a single-walled carbon nanotube and 5-carboxyl-2, 3-diaminopyridine. According to the technical scheme, the problem that the corrosion resistance of the manufactured overhead steel-cored aluminum stranded wire is poor due to the fact that the corrosion resistance of a galvanized steel core is poor in the prior art is solved.

The invention discloses a controllable preparation method for the eutectic phase size of a medium-aluminum type zinc-aluminum-magnesium coating, which comprises the following steps of: preparing the following components in percentage by weight: 0.01 to 0.08 percent of C, less than or equal to 0.03 percent of Si, 0.15 to 0.26 percent of Mn, 0.15 to 0.26 percent of P, less than or equal to 0.01 percent of S, 0.02 to 0.06 percent of Als, less than or equal to 0.3 percent of Ti and the balance of Al; the base material is subjected to annealing treatment, zinc plating treatment and post-plating treatment after multiple working procedures, and the plating layer with the ternary eutectic structure morphology is obtained. Through optimization of base material components, the galvanizing process and the cooling process, accurate control over the eutectic phase size in the plating layer is achieved, and therefore the corrosion resistance, the adhesive force and the uniformity of the plating layer are improved.

The present invention relates to the technical field of welding equipment, specifically a galvanized round pipe welding equipment, including a workbench and a welding gun, and also including a first clamping member, a second clamping member, a deflection assembly, a grinding assembly, a rotating assembly, an expansion and contraction assembly and an adjustment assembly. The second clamping member can move along a preset path to utilize the first clamping member and the second clamping member to clamp two galvanized steel pipes welded at a certain angle. The deflection assembly is used to drive the second clamping member to move along the preset path, and the expansion and contraction assembly is used to realize the separation or combination of the two parts of the rotating assembly; the present invention can adjust the angle between the second clamping member and the first clamping member according to the angle of the two galvanized steel pipes to be welded, so that it can better adapt to the welding requirements of steel pipes at different angles, without the need for manual support and pressing, and can ensure that the two steel pipes can be accurately docked during the welding process to achieve a good welding effect.

The invention discloses an intelligent evaluation method for coating adhesion of a hot-dip galvanized steel pipe, and relates to the technical field of intelligent quality control of galvanized steel pipes, and the method comprises the following steps: constructing a galvanization process time sequence multi-dimensional data set by fusing static attributes of a steel pipe, time sequence process parameters of a galvanization production process and coating thickness measurement data; based on an improved signal volatility analysis method, interface reaction dynamic characteristics and cooling process dynamic characteristics are extracted; implicit microstructure features are generated through a feature cross structure guided by material science and physical information; and realizing continuous numerical prediction and grade probability output of the adhesion of the plating layer by using the implicit space representation regression model based on the antagonistic auto-encoder. According to the method, interpretable mapping between the microstructure and the coating adhesive force in the galvanization process is achieved, the coating adhesive force prediction accuracy and evaluation reliability are improved, and a decision basis can be provided for process adjustment and quality risk pre-control in the production process.

The invention provides a dust removal method and system for a surface galvanizing automatic production line, and the method comprises the steps: installing air quality sensors at all key points in a workshop of the surface galvanizing automatic production line, and monitoring the dust concentration, humidity, temperature and other key parameters in the air in real time; the air quality in the workshop is evaluated according to the key parameters, and if it is monitored that the air dust concentration of a certain workshop area exceeds a preset safety threshold value, the workshop area is automatically adjusted to a dust removal mode; judging that a dust removal mode needs to be started, sending an instruction to dust removal equipment, starting a corresponding dust removal program, and starting an industrial dust collector or a spraying system; after the dust removal equipment starts to work, the air quality sensor continues to monitor the air quality and provides real-time feedback. The system comprises a parameter acquisition module, a quality evaluation module and a dust removal execution module. According to the invention, real-time monitoring, intelligent evaluation, automatic dust removal and continuous optimization of air quality are realized.

The invention discloses an intelligent information acquisition method and system for a steel pipe galvanizing production line, and relates to the technical field of information acquisition optimization. An intelligent information acquisition system for a steel pipe galvanizing production line comprises a steel pipe galvanizing production information acquisition module and a steel pipe galvanizing production optimization module. According to the method, the metal vapor concentration, the iron-zinc alloy layer frequency spectrum signal and the zinc liquid temperature data are collected at high frequency, and the dynamic zinc explosion risk coefficient is quantitatively analyzed, so that real-time early warning of a potential zinc explosion event is realized; compared with a traditional method depending on macroscopic temperature or concentration observation, the zinc explosion risk can be recognized in advance, the occurrence probability of zinc explosion accidents is remarkably reduced, and production safety is improved; according to the system, galvanizing production parameters, galvanizing liquid components, production microscopic signals and steel pipe state data can be collected at the same time, full-process and multi-dimensional data coverage is achieved, information integrity is guaranteed, and a reliable basis is provided for production monitoring and analysis.

The template reinforcing supporting piece comprises a steel plate, sliding grooves are formed in the two ends of the steel plate respectively, and bolts are arranged in the sliding grooves. The steel plate is a galvanized steel plate; the galvanized angle steel is arranged on the upper surface of the steel plate and located between the sliding grooves in the two end parts; the galvanized angle steel is simultaneously arranged on the upper surface and the lower surface of the steel plate; at least three supporting assemblies form a group and surround the outer ring of the formwork in a triangular shape, and all the assemblies are connected and fixed by inserting bolts into the sliding grooves. The special-shaped column formwork fixing device effectively fixes a special-shaped column formwork, avoids unnecessary structural defects, and enables a building to be more attractive and safer.

The invention discloses a zinc skin and zinc powder cleaning device for a galvanized sheet, which relates to the field of galvanized sheet coating cleaning, and comprises a zinc skin and zinc powder removing box arranged between an outlet of a sheet galvanizing cooling section and a tension roller, and two sheet guide parts symmetrically arranged in the zinc skin and zinc powder removing box, the supporting guide roller is arranged in the zinc skin and zinc powder removing box and located between the two plate guide parts, the swinging zinc removing device is arranged with the supporting guide roller as the circle center, and the zinc slag sucking and removing device and the air injection zinc removing device are further included. According to the device, the removal rate of zinc skin and zinc powder on the surface of the galvanized plate is high, meanwhile, zinc slag can be recycled in time, the removed zinc slag is prevented from secondarily polluting the plate surface, meanwhile, the tool bits which work alternately can prevent the tool bits from being overheated during continuous work, and the service life of the tool bits is prolonged.

The invention relates to the field of coating materials, and discloses a passivation solution for a hot-dip galvanized workpiece as well as a preparation method and a use method.The passivation solution is prepared from organic pottery clay, titanium dioxide, ethylene-vinyl acetate copolymer emulsion, waterborne epoxy silicon resin, a silane coupling agent, a coloring agent, filler, an auxiliary and water. The problem of light pollution in areas with high illumination intensity can be effectively solved, workpieces and vegetation in natural scenic areas are organically fused to form beautiful scenery lines, and the technical problems of high cost and weak corrosion resistance of green coatings caused by the fact that green towers are achieved by coating green paint at present can be effectively solved. And the pole tower is green, attractive and good in economic benefit.

The utility model relates to section steel hot galvanizing equipment, and belongs to the technical field of hot galvanizing. According to the technical scheme, the low point of the front end of a magnetic roller frame is located on the discharging side of a zinc pot, the high point of the rear end of the magnetic roller frame is matched with an inclined roller way, and the inclined roller way inclines upwards and is matched with the inclination angle of a row of magnetic rollers; an air knife is arranged at the low point of the front end of the magnetic roller frame, and the air blowing direction of the air knife faces the zinc pot; and after the whole group of section steel is adsorbed by the magnetic roller after galvanization on the lifting hook, the surface of the whole group of section steel is cleaned through the air knife, and redundant zinc liquid after cleaning is blown back to the zinc pot. The device has the positive effects that the material receiving hook groups are alternately finished in the processes of material receiving, galvanizing and leading up, the efficiency is improved, the product quality is stable, the whole group of profile steel is led up by adopting the magnetic roller, meanwhile, the zinc blowing treatment is performed on the discharge side of the zinc pot, the process flow is shortened, the air knife is arranged in the area of the zinc pot, redundant zinc liquid is directly blown back to the zinc pot, and the production cost is reduced. And the zinc consumption is further reduced.

The invention belongs to the technical field of mining construction, and particularly relates to an artificial roof structure and a construction process thereof. The construction process comprises the steps that S1, anchor rod holes are constructed in the positions, 1 m away from a bottom plate, of two sides of a stope, S2, ore cushion layers with the thickness of 200 mm are laid and leveled, S3, I-shaped steel bottom beams are erected and fixed through round steel anchoring parts and welding base plates, S4, a reinforcing mesh is laid, main ribs and auxiliary ribs are bound in a crossed mode and welded to anchor rods, according to the composite structure design of the double-layer reinforcing mesh, the steel wire mesh and the hanging bar system, a three-dimensional stress system is formed, the bending resistance and the shearing resistance of the false roof are remarkably improved, the problem that a traditional false roof is prone to cracking and sinking is solved, and the false roof has the advantages of being simple in structure, convenient to use, economical and practical. Due to the layered matching design of the full-tailing cemented filling body, the bearing strength is guaranteed, seamless roof contact is achieved, the risk of roof hollowing is reduced, the pressure of stope operation circulation is relieved, the ore removal efficiency is improved, and the mining cost is reduced.

The invention belongs to the field of metal materials, and provides 800MPa-grade alloyed galvanized complex phase steel with ultrahigh reaming performance for automobiles and a preparation method of the 800MPa-grade alloyed galvanized complex phase steel, and the steel plate comprises the following components in percentage by weight: 0.12%-0.17% of C, 1.90%-2.25% of Mn, 0.30%-0.65% of Si, 0.020%-0.040% of Ti, less than or equal to 0.030% of P, less than or equal to 0.002% of N, less than or equal to 0.005% of S and the balance of Fe and inevitable impurities. The preparation method comprises the steps of smelting, hot rolling, acid pickling, cold rolling, continuous annealing galvanizing and finishing. The microstructure of the steel plate produced by the method is mainly composed of bainite and tempered martensite, and the steel plate has ultrahigh hole expansion rate and excellent forming performance.

The invention relates to the technical field of welding processing equipment, and discloses a positioning welding tool for processing a solar photovoltaic support, the positioning welding tool comprises a base, a sealing cover is arranged on the base, and a sealed processing space is formed in the sealing cover and the base; and the opening door is arranged in the middle of one side of the sealing cover and used for a worker to feed in the photovoltaic support before machining and take out the photovoltaic support after machining is completed. By adding and arranging the preheating and slow cooling mechanism, before the solar photovoltaic bracket is welded, the mechanism uniformly preheats the welding end part of the bracket, so that the binding force between a zinc coating and a base material is weakened under the thermal action, and the subsequent efficient removal of the zinc coating on the surface of the bracket is facilitated; meanwhile, base material damage or zinc layer residue caused by forced stripping is avoided, the internal stress of the material can be preliminarily released in the preheating process, the deformation risk caused by shock heating in the welding process is reduced, and the geometric stability of the support structure in the machining process is ensured.

A modular system for use in construction, including a first panel, placed vertically, and a second panel, placed horizontally, each provided with a galvanized reinforcement (3) filled with a layer of insulating material. The galvanized reinforcement includes a first net, a second net and a third net transversal to the other two nets to join them. The modular system further comprises an anchoring system between the first panel and the second panel. This anchoring system includes at least one first bracket inserted in the first panel and in the second panel at the respective first nets, and at least one second bracket inserted in the first panel and in the second panel at the respective second nets.

The invention discloses an intelligent detection system and method for the adhesive force of a galvanized wire strip steel zinc layer, and belongs to the field of material detection.The intelligent detection system comprises a stamping male die, a strip steel female die and a female die platform, the stamping male die is used for stamping strip steel, the strip steel female die is arranged below the stamping male die and placed on the female die platform, and the stamping male die is used for stamping the strip steel; and a movable guide rail is arranged below the female die platform. The die further comprises a high-definition camera system, a computer control system and a hydraulic system. The problem that an existing detection method is difficult to meet the rapid detection requirement of a continuous galvanizing production line is solved, the adhesive force of the zinc layer of the galvanized plate is detected through stamping deformation, the movable female die platform is adopted to adapt to galvanized plates of different thicknesses, the tedious process of female die replacement is avoided, the whole plate covering width of a stamping die is wide, multiple times of stamping are not needed, and the production efficiency is improved. The high-definition camera system collects images, the computer control system automatically recognizes dezincification and cracks, personal errors are avoided, the steel coil is automatically blocked and an operator is reminded when detection is unqualified, and the product quality is ensured.

The invention relates to the technical field of rubber hoses, in particular to a pressure-resistant and oil-resistant rubber hose and a preparation method thereof.The preparation method comprises the following steps that S1, nitrile rubber, chloroprene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, sulfur, an accelerant and an anti-aging agent are added into an internal mixer to be evenly mixed, the temperature is controlled for mixing, sheet discharging is conducted, a pipe blank is extruded through an extruder, and the pipe blank is obtained; a combined rubber layer is obtained; s2, the combined rubber layer, the woven copper-plated steel wire layer, the reinforcing layer, the spiral zinc-plated spring steel wire layer, the reinforcing layer, the woven copper-plated steel wire layer and the combined rubber layer are subjected to interlayer bonding in sequence, and the assembled hose is obtained; and S3, the assembled hose is put into a vulcanizing tank to be subjected to vulcanizing treatment. By adopting the seven-layer composite structure design, the rubber hose disclosed by the invention can be in contact with a strong corrosive medium for a long time without internal corrosion, so that the service life of the hose is prolonged, and the safety of the hose in the use process is also improved.

A galvannealed steel sheet includes: a cold-rolled steel sheet having a chemical composition containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; and a galvannealed layer formed on one or both surfaces of the cold-rolled steel sheet. An Fe-based electroplating layer is absent between the galvannealed layer and the cold-rolled steel sheet. In an emission intensity profile, a value of (ISi,Fe) / (ISi,bulk) is 0.90 or less, where (ISi,Fe) denotes an average Si intensity in a range from an interface between the galvannealed layer and the cold-rolled steel sheet to +0.5 μm towards the cold-rolled steel sheet, and (ISi,bulk) denotes an average Si intensity in the cold-rolled steel sheet. An average value of C concentration in a range of 10 μm to 20 μm in a thickness direction from the interface between the galvannealed layer and the cold-rolled steel sheet is 0.10 mass % or less.

The invention discloses an energy-saving type multifunctional galvanizing furnace for hot galvanizing, relates to the technical field of metal surface treatment, and aims to solve the technical problem that the galvanizing quality of a workpiece is affected due to the fact that the temperature of molten zinc on the surface of a current open type galvanizing furnace is unstable. The lifting mechanism is arranged at the top of the galvanizing furnace, the lifting mechanism comprises two cover plates for blocking an opening of the galvanizing furnace, a driving assembly for controlling the two cover plates to move in opposite directions and a hanging bracket for clamping and limiting a workpiece, and the hanging bracket can control the workpiece to ascend and descend through the displacement of the two cover plates. The driving assembly is used for controlling the two cover plates to move in the opposite directions, synchronous linkage of workpiece lifting is achieved, a furnace body opening can be tightly plugged in a non-operation state, the furnace body opening is automatically opened when workpieces are galvanized, the proper opening size can be automatically adjusted according to the sizes of the workpieces, the size of the furnace body opening is automatically adjusted, and the service life of the furnace body is prolonged. And heat loss is reduced, and the workpiece surface galvanizing quality is improved.

The invention relates to the technical field of bolts and provides a corrosion-resistant hot-dip galvanized bolt and a preparation method thereof. The corrosion-resistant hot-dip galvanized bolt is obtained by subjecting a bolt body to electroplating and hot-dip galvanizing. The bolt body is composed of the following components in percentage by weight: Mn 0.18%-0.58%, Te 0.02%-0.05%, Bi 0.004%-0.015%, Eu 0.05%-0.25%, Ge 0.015%-0.045%, Ti 0.02%-0.06%, V 0.05%-0.10%, Co 0.20%-0.50%, Nb 0.05%-0.15%, C 0.20%-0.30%, Mo 0.10%-0.30%, B 0.002%-0.005%, S≤0.01%, P≤0.005%, and the remainder is iron and unavoidable impurities. The above technical solution solves the problems of poor tensile strength of the bolt body, uneven zinc coating and poor corrosion resistance in hot-dip galvanized bolts in the related art.

The invention discloses an aluminum alloy and galvanized aluminum magnesium steel CMT dissimilar metal connection method. The method comprises the following steps that S11, a galvanized aluminum magnesium steel plate to be welded and an aluminum alloy plate to be welded are cleaned before welding; s12, laser etching is conducted on the surface of the cleaned zinc-aluminum-magnesium-plated steel plate, a surface microstructure is prepared, and the depth of the surface microstructure is smaller than the thickness of a plating layer on the zinc-aluminum-magnesium-plated steel plate; and S2, the galvanized aluminum magnesium steel plate with the surface microstructure and the cleaned aluminum alloy plate are placed in a lap joint mode, and welding is carried out. According to the method, the surface microstructure is prepared on the surface of the galvanized aluminum-magnesium steel plate, so that the coating restraint degree of the galvanized aluminum-magnesium steel surface is changed, the contact area of brazing filler metal and a base material is remarkably increased, the coating restraint stress of the surface of the base material is reduced, the flowing resistance of a molten pool is reduced, and the wettability is improved; the surface microstructure can promote evaporation of Zn in the coating and reduce the temperature of a molten pool, so that the thickness of an intermetallic compound is reduced, and the performance of a welded joint is remarkably improved.

The invention relates to the technical field of special cable manufacturing, in particular to a corrosion-resistant power cable and a preparation method thereof.The corrosion-resistant power cable is composed of a copper conductor, a conductor shielding layer, a crosslinked polyethylene insulating layer, an insulating shielding layer, a metal shielding layer, a lining layer, an armor layer and an outer sheath; the surface of the copper conductor is plated with a nickel-phosphorus alloy, and the outer sheath contains low-density polyethylene, an ethylene-vinyl acetate copolymer, nano zinc oxide, a rare earth cerium compound and a silane coupling agent; the insulating layer is prepared through silane crosslinking, the armor layer is a galvanized steel strip or a steel wire, the metal shielding layer is wrapped by a copper strip or a copper wire, and the lining layer is made of polyethylene or a halogen-free material. The outer sheath is high in corrosion resistance, the conductors are resistant to oxidation, the insulation eccentricity is low, the stability is improved through the shielding and armoring structure, the insulation performance is optimized through the cross-linking technology, the preparation technology is suitable for industrial production, the qualified rate of finished products is high, and cost is low.

The present application relates to the technical field of automobile bolt plating, in particular to a hot galvanizing device for automobile bolts, which comprises a processing table, a galvanizing cylinder, a control case, a driving assembly, a lifting assembly and a hanging plate, etc., one side of the processing table is provided with a side plate, the arc-shaped groove on the side plate cooperates with the moving assembly driven by the first motor, so that the base is automatically at the lowest point in the loading and unloading stations, the galvanizing station is precisely aligned with the galvanizing cylinder, the bolts are independently hung through the annular frame, the hanging plate adopts a detachable clamping structure, the second motor drives the bolts to rotate at a constant speed, cooperates with the arc-shaped protrusions at the bottom of the galvanizing cylinder to make the bolts reciprocate and jump, and the lifting assembly controls the immersion depth of the bolts, the device solves the problems of bolt occlusion, collision and uneven plating in the traditional frame soaking process, and through the independent hanging, stable rotation and jumping design, the surface precision of the bolts and the uniformity of the plating layer are ensured.

The utility model belongs to the technical field of tunnel engineering construction, and discloses an assembly type corrugated steel plate preliminary bracing structure for a vertical shaft, which comprises an assembly type corrugated steel plate layer and a plurality of anchor rods, the assembly type corrugated steel plate layer is formed by splicing a plurality of corrugated steel plate units, and one end of each anchor rod is fixed on surrounding rock. The other end of the anchor rod is fixedly connected with the corrugated steel plate unit, and a grouting layer is filled between the assembly type corrugated steel plate layer and the surrounding rock, so that the complex links of material field processing, layered concrete spraying and the like are reduced, and the construction process is greatly simplified; in terms of construction pollution, a large amount of dust generated by sprayed concrete is avoided, the construction environment is improved, the corrugated steel plate layer cooperates with the anchor rod, the grouting layer, the reinforcing mesh and the like to form a stable supporting system, the arc-shaped corrugated steel plate body is attached to the surrounding rock, the zinc coating enhances corrosion resistance, and the foam pad improves the durability of the structure. The tunnel supporting target which is efficient, environmentally friendly, economical, stable and reliable is achieved on the whole.