21800 results about "Steel structures" patented technology

A fireproof insulating foamed cementitious composition with thermal energy storage capacity is provided for use in producing wall insulation boards, fireproof claddings for steel structures, inner cores of fire resistant wall or door panels, and the like. The composition demonstrates improved energy efficiency in which phase change materials, such as microencapsulates, are used in conjunction with a cementitious mixture of calcined gypsum and hydraulic cement, lightweight aggregates, a polymer latex, and a foaming solution to create stable air bubbles inside the cementitious matrix. The calcined gypsum and the hydraulic cement are present in a weight ratio range from about 1:3 to about 3:1. The composition may further include reinforced fibers, surfactants, inorganic flame retardants, and other additives. The presence of the phase change material not only increases energy efficiency of the cured cementitious foam material, but also improves compatibility between calcined gypsum and cement during slurry mixing and hardening.

The invention discloses aqueous fire-proof corrosion-proof paint for a steel structure and a preparation method thereof, and belongs to the technical field of paint. The aqueous fire-proof corrosion-proof paint comprises, by mass, 20-45% of a composite emulsion, 12-25% of a charring catalyst, 6-12% of a foaming agent, 8-17% of a charring agent, 5-10% of a fire retardant, 1-5% of layered double hydroxide, 8-18% of an corrosion-proof filling material, 4-12% of a strengthening filling material, 1-5% of modified nano-powder, 0.5-6% of an assistant and 10-30% of water. Through use of the composite modified emulsion as a base material, coating flame resistance, corrosion resistance and decorativeness are obtained and coating defects caused by a single emulsion as a base material are overcome. Through use of a small amount of the nano-powder, the coating is compact because of filling effects of the nano-powder, the coating corrosion caused by O2, H2O and Cl <-> is avoided, good fire-proof and corrosion-proof effects are obtained under the condition of a small addition amount and a cost is reduced. The aqueous fire-proof corrosion-proof paint has the characteristics of green environmental protection and simple preparation processes.

The present invention provides a weather resistant steel plate, which comprises components of, by mass percent, 0.02 to 0.10 of C, 0.10 to 0.40 of Si, 1.0 to 1.6 of Mn, less than or equal to 0.025 of P, less than or equal to 0.015 of S, 0.20 to 0.50 of Cu, 0.30 to 0.60 of Cr, 0.10 to 0.50 of Ni, less than or equal to 0.40 of Mo, less than or equal to 0.060 of Nb, less than or equal to 0.060 of V,0.010 to 0.035 of Ti, less than or equal to 0.0030 of B, less than or equal to 0.0050 of Ca, 0.015 to 0.050 of Al, and the balance Fe and other unavoidable impurities. Correspondingly, the present invention also provides a manufacturing method of the weather resistant steel plate. Through reasonable distribution ratio of alloy components, the method provided in the invention can obtain a high-strength and high-toughness weather resistant steel plate with good corrosion resisting performance, high yield strength and tensile strength, and excellent low temperature impact toughness. The steel plate also possesses good weldability, being able to carry out welding without preheating or employ lower preheating temperature welding. The steel plate provided in the invention can be widely applied to large-scale steel structure engineering such as building structures, bridges, etc.

The expansive fire-resisting paint contains the components of acrylic resin, catalyst, carbon-forming agent, foaming agent, fire-resisting agent, reinforcing agent, pigment filling material, adjuvantand smoke inhibiting agent, and is characterized by that it utilizes the modification of acrylic resin, surface treatment of catalyst and addition of smoke inhibiting agent to raise comprehensive property of paint. When the paint film is heated and expanded, it can be formed into fire-resistant carbonized layer with three-D space structure, and can release fire-resisting gas to prevent flame fromspreading. Said paint is suitable for steel structure, and material and electric cable, etc.

Provided is a waterborne ultra-thin steel structure fire retardant coating and a preparation method thereof. The raw material ratio of the coating includes 15-50% by weight of polymer latex, 15-30% by weight of ammonium polyphosphate, 5-15% by weight of pentaerythritol, 3-10% by weight of cyanurtriamide, 5-12% by weight of titanium dioxide, 2-13% inorganic filler, 0-5% by weight of expansiveness graphite, 1-10% by weight of plasticizer, 0.4-1.5% by weight of wetting dispersant, 0.2-0.5% by weight of defoamer, 1-6% by weight of coalescing agents and 5-15% by weight of water, and total raw material ratio is 100%. A high-speed dispersion method or a grinding dispersion method is adopted in preparation of the coating. A coating layer of the fire retardant coating can form a carbonization layer which is good in foaming effect, small and uniform in air holes and high in expansion times when in heating. The final fire retardant performance of the coating is far higher than technical requirements of a national standard. The waterborne ultra-thin steel structure fire retardant coating is a waterborne coating product, is non-poisonous and odorless and environment-friendly, and can be coated in a mode of brushing or spraying or roller coating.

The invention relates to an aqueous ultra-thin expansion type steel structure fire-proof anti-corrosive paint and a preparation method thereof. The fire-proof anti-corrosive paint is prepared by adding ammonium polyphosphate, pentaerythritol, melamine, titanium white, expandable graphite, a preservative, a ceramic filler, an antifoaming agent, a dispersing agent, a plasticizer and the like into organic silicon-modified acrylic resin emulsion serving as a film forming base material. The paint has the advantages of high fire-proof performance, anti-corrosion and anti-rust function, and high water resistance, acid-alkali resistance and corrosion resistance, capability of meeting the requirements of various steel structures on the fire-proof and anti-corrosion performance, environmental friendliness, low cost, and readily available raw materials, so the paint can be widely applied to fire-proof protection of various steel structures.

A low Ni and high N austenitic-ferritic stainless steel is disclosed. It includes an austenitic-ferritic stainless steel having high formability and punch stretchability, crevice corrosion resistance, corrosion resistance at welded part, or excellent intergranular corrosion resistance, from a stainless steel structured by mainly austenite phase and ferrite phase, and consisting essentially of 0.2% or less C, 4% or less Si, 12% or less Mn, 0.1% or less P, 0.03% or less S, 15 to 35% Cr, 3% or less Ni, and 0.05 to 0.6% N, by mass, by adjusting the percentage of the austenite phase in a range from 10 to 85%, by volume. Furthermore, it includes an austenitic-ferritic stainless steel having higher formability by adjusting the amount of (C+N) in the austenite phase to a range from 0.16 to 2% by mass.

The invention relates to an all-steel buckling-preventing energy-consuming brace, which belongs to the technical field of structural engineering. The brace is characterized in that the buckling-preventing energy-consuming brace consists of four hot-rolled groove-shape section steels and a kernel linear steel plate; the four hot-rolled groove-shape section steels are connected through high-strength bolts to form a peripheral constraint component capable of forming a constraint mechanism to the kernel linear steel plate; and a certain gap is reserved between the kernel steel plate and the peripheral constraint component and is coated with unbonded material so as to guarantee the smooth slippage between the two and play a role in anticorrosive protection. The all-steel buckling-preventing energy-consuming brace provided by the invention can provide good effect of resisting lateral force for a plurality of high-rise steel structures, and can achieve total cross-section yielding under the action of large earthquakes so as to effectively consume energy. In addition, as the buckling-preventing energy-consuming brace is an all-assembled component, the brace has the advantages that the brace is easy to machine and install, capable of effectively reducing structural construction cost and excellent in performance.

A nonrigid connection apparatus includes a frame-side member securable to a steel structural frame, a brace-side member securable to a seismic brace, and a coupling element that nonrigidly secures the frame-side and brace-side members to each other. By way of example, the nonrigid connection element may provide a hinge-type connection, which substantially isolates a seismic brace from nonaxial loads. As another example, the nonrigid connection element may be a ball-and-socket type connection, which substantially isolates a seismic brace from nonaxial loads and absorbs any shear and moment applied thereto when the seismic brace drifts out of an intended plane of the steel structural frame. The nonrigid connection element may also include a collar to stabilize the brace-side member and prevent shears and moments from causing the same to buckle in an unintended direction. Methods of installing and using the nonrigid connection apparatus are also disclosed.

The invention relates to economic air corrosion prevention low-alloy carbon constructional steel in the field of low-alloy constructional steel. It is mainly used in the steel structure which is used in air such as railroad, carriage, bridge and tower and so on. The alloying component and the percentage by weight of the weather fastness steel is as following: C: 0.12-0.21, Si: 0.2-2.0, Mn: 0.7-2.0, S <=0.036, P<=0.034, Cu: 0.10-0.40, Al<0.2, and other iron and impurity elements.

The invention provides a super-thick film anticorrosion coating of a splash zone marine steel structure. The super-thick film coating consists of base paint, surface paint and mat coat surface paint, wherein the base paint is double-component epoxy base paint; the curing agent is amine; the surface paint comprises double components A and B; and the mat coat surface paint is one of double-component acrylic surface paint, double-component fluorocarbon surface paint and organic silicon surface paint. The super-thick film anticorrosion coating ensures that a marine steel facility can safely serve for more than 30 years in the severe environment of a splash zone, and has extremely high application value; and the surface paint is thick film epoxy surface paint, so the construction thickness can be reached by one to two procedures, the construction process is simplified and the construction expense is reduced.

The invention discloses a steel structure BIM information management method and system based on a cloud server. Based on the visualization of the three-dimensional project model, the method utilizes data collection, real-time monitoring, analysis and forecasting means to timely grasp the project and the progress, to monitor the early warning and to analyze and predict the project operation condition by unified management of the data, business flow, progress, cost and the like of the project life cycle, so that the enterprise project management mode is improved, and the construction of streamlined and informatization enterprise management mode is promoted. The system integrates a project data subsystem, a business flow subsystem, a BIM application subsystem, an early warning subsystem, a reporting subsystem, a background maintenance subsystem, a mobile terminal and a cloud server, and intelligently manages the project from the design, construction and operation of the life cycle, thereby shortening the project construction period, reducing the management cost and promoting the healthy development of the enterprise.

The invention relates to a method and an apparatus for handling pipes, such as rods and drilling strings, in drilling rigs and drilling installations for sinking boreholes, in particular on hydrocarbon reservoirs. The apparatus according to the invention for handling pipes and drilling strings in a drilling installation having a steelwork structure with a set-down platform, a working platform, a lifting device, a drill drive and a pipe connecting device is defined in particular by the fact that there is arranged on the drilling installation a wireline, a two-axis crane which is connected to the wireline and to the steelwork structure and an extension element, which is arranged on the outside of the racking platform and has a passage to the racking platform, and also by the fact that a set-down and make-up device, arranged beside or on the working platform, is provided for vertical pipes, it being possible for the set-down and make-up device to be accessed by the wireline.

The invention provides a room temperature fast-drying highly-anticorrosive two-component waterborne epoxy coating and a preparation method for the coating. The coating comprises A and B two components, wherein the A component consists of liquid epoxy resin, solid epoxy resin, an epoxy resin reactive diluent, a cosolvent, and a non-ionic surface active agent; the B component consists of a waterborne epoxy curing agent, an anticorrosive pigment, a foam killer, a corrosion inhibitor, a substrate wetting agent and de-ionized water, and during application, mass proportion of the A component to B component is 1:3-6. The coating is high in curing speed of coated film, the surface is dried in 30min at room temperature without being roasted; the coating has high early hardness, and the hardness can reach 3H in 48 hours; and in addition, the coating is good in thermal resistance stability, low in VOC (Volatile Organic Compound) content, excellent in anti-corrosion performance, and is capable of replacing a solvent type two-component epoxy coating to be applied to the anti-corrosion of a steel structure.

The present invention provides a water environment-protecting superthin expanded type steel structure fire-retardant coating. Said fire-retardant coating uses water as dispersion medium, uses flake expandable graphite as expansion reinforcing material, uses one or several kinds of emulsions of acrylic emulsion and others as film-forming material, and its expansion system adopts the ingredients of polyammonium phosphate, pentaerythritol and tripolycyanamide. Said invention also provides its preparation method and concrete steps.

The invention relates to an easily repaired steel-structure beam-column node, in particular to an easily repaired steel-structure beam-column node which is applied in the field of structural engineering and particularly used in high-intensity earthquake-proof areas. The node comprises an upright H-shaped steel column and an H-shaped steel beam of which the end part is vertically connected on a side wing plate of the H-shaped steel column, and is characterized in that: connecting ends of a belly plate of the H-shaped steel beam and the side wing plate of the H-shaped steel column are connected by a reinforced connecting plate closely contacted with the belly plate of the H-shaped steel beam and high-strength bolts penetrating the reinforced connecting plate, the reinforced connecting plate is in welding connection with the side wing plate of the H-shaped steel column, and both sides of the connecting end of a bottom side wing plate of the H-shaped steel beam are in locked connection with the H-shaped steel column by a T-shaped connecting plate and penetrating high-strength bolts respectively; and the T-shaped connecting plate is transversely arranged, upper and lower ends of the T-shaped connecting plate in the vertical direction are in locked connection with the side wing plate of the H-shaped steel column by a washer and the penetrating high-strength bolts respectively, a transverse plate of the T-shaped connecting plate is supported on the lower part of the bottom side wing plate of the H-shaped steel beam and locked by the penetrating high-strength bolts. The structure can effectively avoid brittle failure, has good ductile fracture characteristic, and can be widely applied to structures of earthquake areas, particularly the high-intensity earthquake-proof areas; and the easily repaired steel-structure beam-column node of the invention also has the advantages of convenient construction and convenient after-earthquake repairing.

The invention relates to a novel archaized building which has the advantages of energy conservation and emission reduction and a construction method thereof. The invention is applicable to various archaized buildings, and the novel archaized building is characterized by comprising a Chinese round-ridge gabled roof 1, a gable and hip roof 2, a wall body, a flat roof eaves cap, a festoon gate, a verandah 3, a screen wall 4, a courtyard wall 5 and the like; completely based on the external shapes of the existing archaized buildings, the novel archaized building adopts lightweight steel construction as a structural support framework or a support member bar of purlins, square-columns, beams, rafters, pillars, the wall body and roofing tiles, and adopts modern construction materials such as thin steel plates, aluminium alloy plates, GRC or glass fiber reinforced plastic and the like which are made into various novel components and parts such as purlins, square-columns, pillars, the wall body and roofing tiles; factory production (including painting and colored drawing) is carried out, and the novel components and parts are assembled on-site and replace the existing traditional archaized building materials such as wooden beams, pillars, rafters, soil calcined tiles and the like as well as the retarded construction technology, thus achieving the aim of energy conservation and emission reduction, clean construction and installation, increment of working efficiency, reduction of erection time and cost reduction.

The present invention relates to a method for installing a large span steel truss on high altitude. The method comprises the steps of arranging embedded part on the structure girder at two sides of the designed position of the steel truss, then installing extensible guide on the embedded part, and at last assembling a specialized steel structure tackle. Firstly, a large tonnage hoisting machine is used for hanging the steel truss which is wholly assembled underground to two tackles that are arranged on station. Afterwards, the steel trust is parallelly moved to the installation position through the synchronous slippage of two tackles on the extensible guide. Lastly, the two-end capitals of the designing position of the steel truss are installed with an independent holding pole, a chain block and a pulley assembly. These hoisting apparatuses are used for hanging the longeron from the tackle. The longeron of the lengthened part is cut and the steel truss is installed to the position according to the design requirement. Compared with the traditional high altitude dispersed splitting method for building whole surface of scaffold, the installing method provided by the invention subtly settles many abuses of difficulty for controlling the construction quality, long construction period and the like in the traditional method. The manpower and considerable material transportation are saved and the construction quality can be effectively guaranteed. Various requirements of the designing and constructing are excellently and rapidly satisfied.

The invention discloses a water-based ultra-thin fire-retardant coating for steel structures. The fire-retardant coating comprises components as follows: a binder emulsion, an intumescent flame retardant system, filler, deionized water and additives, wherein the additives comprise a dispersing agent, an antifoaming agent, a mold inhibitor, an anti-flash-rust agent, a coalescing agent, a leveling agent and a thickener; the intumescent flame retardant system comprises a dehydration catalyst, a carbonizing agent and a foaming agent. The invention further designs a preparation method of the water-based ultra-thin fire-retardant coating for the steel structures. The components are mixed sequentially to be prepared into the water-based ultra-thin fire-retardant coating for the steel structures in a vertical sand mill and a dispersing tank. The prepared coating is large in adhesive force, high in hardness, good in fireproof property, good in anti-scratch performance and excellent in weather resistance and water resistance, the surface layer of the coating is fine and smooth, the decoration performance is improved significantly, and the preparation method is low in energy consumption and has the advantages that the harm to human bodies and the pollution to the environment during preparation are small and the like.

A constructing method for a concrete cylinder of a construction steel bar of a high-rise steel structure adopts a constructing method of supporting inside and climbing outside. The outside of the cylinder adopts hydraulic mutual-climbing adhesive lifting scaffold creeping formwork system (100), and also has an outside wallboard mechanical formwork erection function and an outer frame protection function. For the inside of the cylinder, except that an appropriate structure is left for later processing according to a schedule requirement, beam walls all adopt a steel cylinder support to perform formwork erection, so as to greatly reduce the workload of repeatedly mounting/dismantling the scaffold and the formwork at a high place. The scaffold itself carries the formwork erection system, so formwork erection and formwork removal can be mechanized, thereby reducing the risk of formwork erection and formwork removal at a high place

The present invention relates to a water thin expanding steel structure fire-resisting coating material and its preparation method. Said ivnention adopts a self-synthesized high melting temp. acrylate emulsion as main film-forming substance, adding proper quantity of chlorometaemulsion to raise fibre resistance of film-forming substance self-body, and on the basis of convertional ammonium polyphosphate fire-resistant adjuvant an expandable graphite as foaming material is added so as to form the invented fire-resisting coating material. Said invention can greatly raise forming rate to coating layer, the thickness of foamed layer can be up to 30-50 times that of original coating layer, and its fire-resisting limit can be up to 75 min (thickness of coating layer is 3 mm).

The invention discloses an integral low-temperature nuclear heat reactor with the circuit equipment adopting integral arrangement and belonging to the low- and medium-parameter pressurized-water reactor, wherein, a reactor core adopts the mature nuclear power plant fuel component and control rod component; a main heat exchanger is of integral coil type; a voltage stabilizer is a built-in nitrogen partial pressure control voltage stabilizer; coolant circulation is completed by a built-in jet apparatus and the equipment of an external drive circuit; the drive circuit and the equipment and a main circuit auxiliary system are arranged at the circumference of a reactor pressure vessel; a containment vessel consists of a reactor body containment vessel and a reactor top containment vessel; the reactor body containment vessel which is a structure combined by a reactor vault of reinforced concrete structure and a casing of steel structure is connected with a sealed refueling water storage pool through a pipe and a valve. The thermal power of the reactor can be selected between 50MW and 500MW at will and the outlet temperature of the reactor can be selected between 100 DEG C to 200 DEG C according to application, requirement and power.

The invention discloses an ultra-thin fireproof coating for a steel structure and a preparation method thereof. The coating has the characteristics of high gloss, good water resistance, strong adhesion force and so on of a solvent based ultra-thin fireproof coating, also has the advantages of water-based coatings by taking water as a medium, and satisfies the direction of developing low-pollution and environment-friendly coatings of the coating industry. The technical proposal comprises that the ultra-thin fireproof coating for the steel structure is prepared from the following components by weight portion: 10 to 35 portions of acrylic hybrid emulsion, 10 to 25 portions of dehydration and carbon-forming catalyst, 10 to 25 portions of carbon forming agent, 5 to 20 portions of foaming agent, 5 to 20 portions of flame retardant, 5 to 25 portions of pigment and filler, 3 to 10 portions of reinforcing agent, 5 to 10 portions of latent solvent, 1 to 5 portions of dispersant, 0.1 to 1 portion of foam killer, 0.2 to 2 portions of flatting agent, 0.2 to 2 portions of thickening agent, 1 to 5 portions of film forming additive, and the balance being water.

The invention relates to a kind of new-style low smoke super thin inflating steel structure fire protection dope and its producing method. Its components have coordinated effect when encountering fire. It inflates and froths to isolate oxygen and has good heat insulation performance. It can slow down the speed of heat transmitting to protected basic material, and prevent flame fast overspreading. The dope of the invention is mainly comprised of basic material resin, carbon forming agent, vesicant and activator. It uses certain proportion of resin as main membrane forming substance, and improves height and intensity of frothing layer through adding china padding. The frothing height can get to over 50 times. It uses china padding and smoke inhibitor to have coordinated effect and reduce smoking quantity. Advantages: simple to smear, good fire protection performance, small smoking quantity, high frothing height and high frothing intensity.