195 results about "Steel plates" patented technology

The invention discloses a laboratory model testing device for tunnel excavation. The laboratory model testing device comprises a model box, a tunnel structure model, a loading device and an excavation device, wherein the model box is composed of a floor trough and an organic glass plate, the organic glass plate is fixed on the opening surface of the floor trough through a groove; model testing fillers are padded in the model box; the tunnel structure model is made of rosin materials in a casting manner according to the ratio of similitude of an actual tunnel section, and is arranged in the middle of the model box; the loading device mainly comprises a counter-force beam, a steel plate and a hydraulic jack, and is arranged on the top of the model box; the excavation device mainly comprises a heating wire, a lead and a power supply switch, wherein the heating wire is arranged in the tunnel structure model. Due to the adoption of the testing device, the shape and size simulation in the tunnel excavation process can be performed conveniently, an excavation boundary can be well matched with a geometric boundary designed in advanced, the simulated tunnel excavation can be relatively well matched with an actual engineering; the testing device is simple in structure, convenient to operate, low in cost, and convenient to develop and apply.

The invention relates to a high-strength steel plate which comprises the following chemical compositions according to percentages by weight: 0.26-0.35% of C, 0.15-0.50% of Si, 0.60-0.90% of Mn, 0.60-1.00% of Cr, 0.55-0.90% of Mo, 0.80-2.00% of Ni, 0.01-0.10% of Nb, 0-0.10% of V, 0.0006-0.0025% of B, 0.01-0.08% of Al, 0.003-0.06% fo Ti, the rest of Fe and inevitable impurities. A manufacturing method of the high-strength steel plate comprises the following steps of: smelting, casting, heating and rolling the steel plate, and then carrying out austenitization quenching thermal treatment on the steel plate in the temperature of 850-950 DEG C, and adopting water quenching treatment after austenitization; and finally carrying out tempering thermal treatment in the temperature of 180-300 DEG C and air cooling after tempering. The organization of the obtained steel plate is tempered martensite; the yield strength of the steel plate is greater than or equal to 1300Mpa; the tensile strength of the steel plate is greater than or equal to 1400Mpa; and the charpy impact energy, i.e. Akv (-20 DEG C) of the steel plate is greater than or equal to 30J.

The invention relates to a stainless steel plate 8K mirror surface processing method, which is characterized in that the method comprises the following steps of: 1) water washing: cleaning sundries on the surface of a stainless steel plate; 2) rough polishing: polishing the surface of the stainless steel plate by using a rough polishing abrasive tool, i.e. a graphite wheel till the surface is evenly treated and is free of pocking marks, wherein the polishing gap is half of diameter of the polishing wheel; 3) precise polishing: precise polishing the surface of the stainless steel plate by using a precise polishing abrasive tool, i.e. a wool felt, in combination with polishing solution till the surface is free of wheel knurls and fine scratches and is uniform; 4) water washing and drying: washing the stainless steel plate with water and blow-drying the stainless steel plate by using a dryer; and 5) film sticking: sticking a film by using a stainless steel plate film sticking machine. By using the stainless steel plate 8K mirror surface processing method, the surface of a stainless steel plate production can be polished to an 8K mirror surface from a 2B or rougher surface, the mirror surface is bright, gorgeous, attractive and generous, and the processed product satisfies the requirements in SN/T1671-2005 Rules for Inspection of Surface Quality of Stainless Steel Decoration Sheets for Export.

The invention relates to a control method of inclusions in a thick steel plate used for high heat input welding, which is characterized by adding a deoxidizing agent during steel liquid pouring, wherein the components and adding order of the deoxidizing agent are as follows: Mn and Si, Al, Ti, Ca and Mg; the Mg content is 0.0005-0.007%, when Mg is added for deoxidizing, the oxygen content in steel liquid needs to be adjusted and precisely controlled through adding Fe2O3 powder to a casting ingot mold, and the adding amount of the Fe2O3 powder is such that the oxygen content in the steel liquid is maintained at 0.001-0.008%; the Al content in steel is lower than 0.006%; the ratio of the inclusions with size smaller than 3mu m in the steel liquid is not lower than 80%, and the surface density of the inclusions is not smaller than 300 inclusions/mm<2>; the main components in the center of the inclusions are MgO or MgO and Ti2O3, and the main component on the external surface of the inclusions is MnS. The inclusions formed by using the method provided by the invention can favorably inhibit the growth of austenite crystal in a welding heat-affected zone and promote the growth of intracrystalline ferrite, thus improving the high heat input welding performance of the thick plate.

The invention provides a hot-dry rock fracturing high-pressure extraction laboratory simulation device. The device comprises a fracturing fluid injection system, a proppant injection system, a high-pressure gas boosting injection system, a fracturing body, an annular pressure applying system and a high-pressure pipe valve. The proppant injection system comprises indirect proppant injection and curing. The high-pressure gas boosting injection system comprises gas boosting and indirect gas injection. The fracturing body comprises a sample fracturing chamber and a sample annular-pressure chamber. The fracturing chamber comprises a three-dimensional fixing support and a three-dimensional hydraulic system. The three-dimensional hydraulic system comprises a hydraulic sliding cavity and a hydraulic moving plug. The sample annular-pressure chamber comprises an annular-pressure chamber steel plate and an inner gum sleeve, a cavity is formed between the gum sleeve and the steel plate, and fluid is injected to realize pressure coating effect. Fracturing fluid injection and annular pressure application are both realized by connection of a high-pressure pipeline with a high-pressure control component. A split module combination structure is adopted, original samples of fracturing samples are ensured to be unchanged, proppant injection is performed accurately, high-pressure gas is injected for displacement and reproduction, and recovery ratio is increased. The device has the advantages of novel structure and safety and durability.

The invention is a profiled steel pillar top constraint node for profiled bar concrete framework steel support structure, interconnecting in-beam profiled steel, in-pillar profiled steel, pillar main bar, steel support, in-pillar concrete, and in-beam concrete and pouring them into an organic whole, where the tops of the in-pillar profiled steel and the pillar main bar are welded with a constraint anchoring steel plate, the middle of the steel plate is made with vibrating hole and welding hole, the sides of the steel plate are made with plug welding holes, the pillar main bar is welded with the steel plate at the plug welding lines, and the in-pillar profiled steel is welded with the steel plate at the welding line holes. And it improves the integrity of profiled steel pillar top nodes, on the one hand saving the utilization of anchoring reinforcing bars and on the other hand convenient to construction, raising constructing efficiency and saving labor and time.

The present invention provides a steel cooling control simulation system and method. A process control device is connected with cooling equipment simulation device, the cooling equipment simulation device includes a transmission fixed with steel bar, a cooling course temperature calculating device simulating the temperature measurement and a patrol demonstrator, an electric potentiometer, a photoelectric switch and a position locator for temperature display, the photoelectric switch is provided on the operation path of the steel bar. The course control device completes the optimization setting function to PLC control variable, PLC completes the real-time control function of the cooling simulation course, the cooling equipment simulation device executes the real switch and adjustment action of the simulation cooling line, and achieving the real-time data collection course. The cooling control course system is simulated by the hardware connection of each device and software cooperation, providing a pilot test device of simulation evaluation in order to improving and completing the control system.

The invention discloses an asphalt pavement prefabricated block and a construction method for a prefabricated asphalt pavement. The asphalt pavement prefabricated block is characterized by comprising a base plate (1), an adhesive layer (2) on the plate and an asphalt surface layer (3) from bottom to top; and the asphalt pavement prefabricated block is cuboid, one side length of the bottom is 5 to 20 meters, and the other side length of the bottom is 1 to 20 meters. The asphalt bottom is reinforced by adopting the base plate which has a thermal expansion coefficient close to those of cement concrete and a steel plate and is made of fiber reinforced composite material, so that the fatigue resistance and the reflection crack resistance of the asphalt surface layer are improved; rainwater is effectively prevented from seeping from the asphalt surface layer to corrode a lower bearing layer; and through the prefabricated block, the rigidity of a steel bridge floor can be improved, and particularly the steel bridge floor with insufficient steel plate thickness can be reinforced, so that the thickness of the asphalt surface layer is reduced, and damage such as cracking, falling and the like of the asphalt paved layer due to insufficient rigidity of the steel bridge floor is avoided.

The invention discloses a high-toughness steel plate with yield strength at 460 MPa grade. The steel plate includes the following chemical components as raw materials by weight: 0.05-0.08% of C, 0.2-0.4% of Si, 1.2-1.6% of Mn, no more than 0.02% of P, no more than 0.01% of S, 0.04-0.06% of Nb, 0.04-0.07% of V, 0.006-0.012% of Ti, 0.0015-0.003% of Ca, 0.017-0.027% of Als and the balance of iron and impurities. The invention also discloses a production method of the high-toughness steel plate with yield strength at 460 MPa grade. The invention employs low-carbon design and appropriate controlled rolling and controlled cooling technologies to realize fine ferrite crystal grains, good toughness and good welding performance of the steel plate. The method has the advantages of simple process route, short production period, low manufacture cost and lax process system, and can be used for stable production on a wide and thick line.

The invention discloses a production method for improving the surface quality of thin-gauge pipeline steel. Chemical components comprise, by mass percent, 0.040%-0.080% of C, 0.10%-0.30% of Si, 1.20%-1.90% of Mn, not larger than 0.015% of P, not larger than 0.0030% of S, not larger than 0.30% of Ni, not larger than 0.30% of Cr, not larger than 0.20% of Cu, not larger than 0.070% of Nb, not largerthan 0.15% of Mo, not larger than 0.01% of V, 0.005%-0.02% of Ti, not larger than 0.0050% of N, 0.001%-0.003% of Ca, 0.010%-0.050% of Al and the balance Fe and inevitable impurities. Through the smelting process, the surface quality of a cast blank is optimized and improved, the rolling forming technology is adjusted, the integrity of scale on the surface of a steel plate is improved, a corrosion-resisting pipeline steel plate with high surface quality is obtained, and the product quality is improved.

The invention discloses a shield machine receiving steel platform which comprises a plurality of steel supporting upright posts, a thick steel plate and a steel bracket; under the condition that a medium plate structure is too late to construct, a steel upright post platform can be utilized for receiving a shield machine; a connecting system cross-welded and fixed by 20a I-shaped steels is adoptedamong the steel upright posts, so that the integrity is ensured to be formed among the steel upright posts, therefore, the stability is higher; the receiving bracket is welded with the 2-cm steel plate by adopting additionally-arranged I20a angle steels as an anti-slip stop block, so that the slippage of the shield machine is prevented, and the shield receiving safety is ensured.

The invention discloses a jacking pipe cutting protective structure for building remains and a construction method thereof. The protective structure comprises an earthwork foundation, a migration body, a box-shaped protective system and a hoisting base, and the box-shaped protective system comprises steel plate protective barrels and protective barrel keels; and the hoisting base comprises steel pipe curtains and opening locking steel beams, the opening locking steel beams and the steel pipe curtains are connected to form a whole, and the hoisting base is provided with hanging point structuresfor allowing hoisting ropes to be connected. The construction method of the protective structure comprises the steps of layered excavation of earthwork, pre-reinforcing of the migration body, lateralreinforcing, earthwork foundation construction, surrounding basement treatment, erection of a jack jacking pipe device, jacking trying, steel pipe marching, butting-joint of steel pipes, jacking andpenetrating through of a soil body, connection of the steel pipes and the opening locking steel beams, hoisting point setting, hoisting and the like. According to the jacking pipe cutting protective structure for the building remains and the construction method thereof, site arrangement is easy, the construction progress is quick, interference factors are less, civilized construction is facilitated, various resources can be well utilized, it can be ensured that surrounding existing facilities are intact, and safety of lives and property of residents is ensured.

The invention discloses a steel pipe with bell and spigot joints. The steel pipe comprises a basal steel pipe, wherein the basal steel pipe is a cylindrical pipe having a spiral welded junction and formed by spirally rolling, welding and fixedly connecting steel plates. The steel pipe is characterized by further comprising a spigot joint steel pipe and a horn-shaped bell joint; at least two annular grooves for placing sealing rings are formed in the outer surface of the spigot joint steel pipe; the two ends of the spigot joint steel pipe are respectively an inserting end and a welding end; a conical surface in sealing contact with the bell joint is arranged at the outer side of the inserting end of the spigot joint steel pipe; one end of the basal steel pipe is welded and fixedly connected with the welding end of the spigot joint steel pipe; and the other end is welded and fixedly connected with the small end of the horn-shaped bell joint. Connecting structures are as follows: the spigot joint steel pipe of the previous steel pipe is in sealing contact with the conical part of the horn-shaped bell joint of the next steel pipe through the conical surface of the spigot joint; and the spigot joint steel pipe of the previous steel pipe is in sealing contact with the horn-shaped bell joint of the next steel pipe through the sealing ring thereon. The steel pipe has such advantages as simple structure, high sealing reliability, quick mounting, convenience for maintenance and disassembly and long service life.

The invention discloses a high-surface-quality hot-galvanized transformation induced plasticity (TRIP) steel plate and a manufacturing method thereof. The hot-galvanized TRIP steel plate is prepared from chemical components in percentage by weight as follows: 0.10%-0.15% of C, 1.20%-1.80% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 1.20%-2.40% of Als and the balance of Fe and inevitable impurities. The manufacturing method of the TRIP steel plate comprises the steps as follows: continuous casting steelmaking-hot rolling-cold rolling-continuous annealing and hot galvanizing. The structure form of the hot-galvanized TRIP steel plate prepared with the method includes ferrite, bainite, retained austenite and martensite, the grain size grade ranges from Grade 10.5 to Grade 11, the tensile strength ranges from 640 MPa to 670 MPa, the yield strength ranges from 395 MPa to 465 MPa, the ductility is higher than or equal to 30%, the strength and ductility product can be 23GPa% or above, and the plate has the high surface quality, mechanical performance and corrosion resistance.

The invention discloses an elevator car. The elevator car comprises a car body, handrails, a mirror-like stainless steel plate and a tempered glass window; the handrails are arranged at the bottom of the car body, the handrails are fixedly connected with the car body, the mirror-like stainless steel plate is arranged on the side face of the car body, the tempered glass window is arranged on the top of the car body, protrusions are arranged on the two sides of the tempered glass window, the tempered glass window is connected with the car body through the protrusions in a clamped mode, LED lamp beads are installed at the bottom of the tempered glass window, a buffer layer is installed at the bottom of the car body, and a tetrafluoroethylene layer is arranged on the outer side of the car body. The elevator car is corrosion resistant in structure, long in service life and high in safety property.

The invention discloses a method for the combination of a post-increasing steel beam and a concrete slab. Firstly, the location of a post-increasing steel beam (3) and a connecting steel plate (1) is determined on the bottom surface of a built concrete slab (4); secondly, a post-anchoring building anchor bolt (2) is anchored in the built concrete slab (4) at the location of the connecting steel plate (1); then the connecting steel plate (1) is fixed on the bottom surface of the built concrete slab (4) by the post-anchoring building anchor bolt (2); finally, the post-increasing steel beam (3) and the connecting steel plate (1) are connected. The invention uses the post-anchoring building anchor bolt for replacing the traditional shearing connecting piece, is used for bearing the vertical shearing force between the superimposing surfaces of the steel beam and the reinforced concrete slab, restricts the relative sliding of the steel beam and the reinforced concrete slab, causes the steel beam and the reinforced concrete slab to be combined into a whole and work reliably, and provides a simple and effective processing method for the technical transformation of the combination structure of the steel and the concrete.

The invention discloses a method for hoisting and transporting steel plates by adopting an electromagnet in steel plants. An electromagnet for hoisting and transporting the steel plates is provided with an electromagnet buffer device; the device is vertically provided with a buffer body; the lower end of the buffer body is provided with a buffer element capable of sliding vertically; the upper end of the buffer element is provided with a spring for buffering; the buffer body is detachably provided with a buffer head; the buffer head is prepared from three different kinds of materials and are selected for use according to different hoisting and transporting fields; in use, the electromagnet is hoisted up to stably fall on steel plates required to be hoisted and transported, is supported by the buffer device so as to enable a gap of 2-3cm to be formed between the bottom surface of the electromagnet and the steel plates, then is started up again when being stable, and generates suction force so as to enable the bottom surface of the electromagnet to be in contact with the surfaces of the steel plates to achieve connection, so that the electromagnet can hoist and transport normally. The method for hoisting and transporting the steel plates by adopting the electromagnet in steel plants provided by a invention can effectively prevent scratching or collision damage to the surface quality of finished product steel plates by the electromagnet in hoisting and transporting the finished product steel plates at different temperatures, can lower auxiliary material consumption of running vehicle magnetic force hoisting and transporting and labor intensity of field workers, and can improve the working efficiency.

The invention provides a one-step spinning machine capable of conducting entwisting clockwise and a one-step spinning method. The one-step spinning machine comprises a carding roller, a cover, a fiber feeding mechanism, a yarn winding mechanism and an air sucking device. The one-step spinning machine is characterized in that an irregular-shaped pipe formed by a conical pipe and a trapezoid pipe is arranged below the carding roller. The trapezoid pipe is formed by defining two trapezoid steel plates and two trapezoid mesh plates, and a U-shaped fiber cohesion area formed by a semi-circular-arc mesh plate is arranged at the outlet end of the trapezoid pipe so as to achieve cohesion of fiber in the irregular pipe. One side of the cohesion area is connected with a rotation flow entwisting pipe in butting mode, and the inner diameter of the rotation flow entwisting pipe and the U-shaped cohesion area form a straight smooth yarn channel. Compressed air enters along an air inlet hole of a lateral wall of the rotation flow entwisting pipe to form forward rotation flow to finish entwisting of strips and push the yarn to move forward. Fiber is fully separated, stretched, becomes parallel and is combined evenly on one device, and the one-step spinning machine is simple and compact in structure, convenient to machine and manufacture and low in cost. The one-step spinning method achieves purposes of high speed, high yield, high efficiency and high quality.

The invention relates to a vehicle-mounted silicon steel coil thermostat. The vehicle-mounted silicon steel coil thermostat comprises a platform vehicle, and casters are mounted at the bottom of the platform vehicle through caster supports. The vehicle-mounted silicon steel coil thermostat is characterized in that a thermotank is mounted on the upper portion of the platform vehicle and comprises an upper thermotank cover and a lower thermotank fixed frame, the lower thermotank fixed frame is fixed on a steel plate on the platform vehicle, a support for loading silicon steel coils is arranged in the lower thermotank fixed frame, one side of the upper thermotank cover is fixed on a rotating shaft, and the rotating shaft is mounted on the platform vehicle through a support frame and is driven to rotate by a driving mechanism so as to drive the upper thermotank cover to overturn to be opened. The vehicle-mounted silicon steel coil thermostat is simple and ingenious in structure, convenient to move, capable of enabling the silicon steel coils to keep at relatively constant temperature during transportation and beneficial to finish machining of the silicon steel coils.

The invention discloses a low-cost high-strength steel plate for engineering machinery, and a production method thereof. The steel plate comprises, by mass, 0.16-0.18% of C, 0.3-0.4% of Si, 1.0-1.4% of Mn, 0.016% or less of P, 0.009% or less of S, 0.4-0.7% of Ni, 0.3-0.5% of Cr, 0.01-0.03% of Nb, 0.02-0.06% of Al, 0.30-0.40% of Mo, 0.010-0.030% of Ti, 0.0016-0.0030% of B, and the balance of Fe and inevitable impurities. The components of the steel plate produced through the method are reasonably designed, and a proper amount of boron element is added to reduce the use amount of alloy elements, so the production cost is low; a two-stage controlled rolling technology is adopted to solve coarse and uneven crystal grains due to common hot rolling, so the produced steel plate has excellent comprehensive mechanical performances and uniform rolled structure, and provides a uniform original structure for subsequent heat treatment; an offline quenching heat treatment technology is adopted to make the steel plate have a martensite structure, so the strength grade of the steel plate is improved, and the plate shape of the steel plate is good; and a tempering heat treatment technology is adopted to eliminate the internal stress of the steel plate, so the low temperature toughness of the steel plate is improved, and the structure of the steel plate is uniform.

Provided is a steel bridge deck pavement structure with reinforced construction. The steel bridge deck pavement structure is jointly composed of a prefabricated reinforced steel plate (1), an anticorrosion layer (2), a waterproof layer (3), a lower surface layer (4), a fiber grid (5) and an upper surface layer (6) from bottom to top, and is characterized in that the top surface of the prefabricated reinforced steel plate (1) is provided with the reinforced construction, the fiber grid (5) is composed of longitudinal grid ribs (51) and transverse grid ribs (52) in a mutual interlaced mode, theinteriors of the lower surface layer (4) and the upper surface layer (6) are mixed with reinforced short fibers, and the fiber grid (5) is poured between the lower surface layer (4) and the upper surface layer (6) or into the upper surface layer (6), and achieves common working with the lower surface layer (4) and the upper surface layer (6) through surface construction. The steel bridge deck pavement structure with the reinforced construction has a good interlayer bonding performance, and can effectively prevent the risk of interlayer cracking and pavement layer fatigue cracking, meanwhile, through a novel prefabricated reinforced steel plate mode, the construction technology is simplified, the construction efficiency is greatly improved, the production installment cost is saved, the building cost of projects is reduced, and the normal use and durability needs of a bridge structure can be met.

Provided are an abrasion resistant steel plate having excellent low-temperature toughness and hydrogen embrittlement resistance, and a manufacturing method therefor. The steel plate, which has a Brinell hardness (HBW10/3000) of 401 or more, and a plate thickness of 6-125 mm, contains 50 100 [mu]m2 or more of fine precipitates having a diameter of 50 nm or less in lath-martensite steel that has crystal grains which are surrounded by high angle grain boundaries of a misorientation of 1 degree or more, and have an average particle size of 20 [mu]m or less. The steel contains, by mass%, C: 0.20-0.30%, Si: 0.05-0.5%, Mn: 0.5-1.5%, Cr: 0.05-1.20%, Nb: 0.01-0.08%, B: 0.0005-0.003%, Al: 0.01-0.08%, N: 0.0005-0.008%, P: 0.05% or less, S: 0.005% or less, and O: 0.008% or less, moreover contains, as required, one or more rare earth elements from among Mo, V, Ti, Nd, Cu, Ni, W, Ca, and Mg, and satisfies 0.03 <= Nb+Ti+Al+V <= 0.14, with the remainder being constituted by Fe and unavoidable impurities. The steel is cast, and after rolling, is reheated to the Ac3 transformation point or higher, and successively quenched from the Ar3 transformation point or higher to a temperature of 250 degrees centigrade or less by water cooling. As required, the steel is reheated to 1100 degrees centigrade or more, the rolling reduction of a non-recrystallisation region is 30% or more, and the steel is cooled by water cooling to a temperature of 250 degrees centigrade or less, and reheated at a rate of 1 degree centigrade/s or more to the Ac3 transformation point or higher.

The invention discloses a vehicle overload alarm method. A vehicle comprises a vehicle frame (1) and a steel plate spring (2). The vehicle overload alarm method comprises of detecting a height difference between the vehicle frame (1) and a center point of the steel plate spring (2), making a comparison between the height difference and a height difference threshold value, and giving an overload alarm when the height difference between the vehicle frame (1) and the steel plate spring (2) is smaller than the height difference threshold value. The invention further discloses a vehicle overload alarm system and the vehicle. With the above technical scheme, the vehicle overload alarm system is provided; whether the vehicle is overloaded can be determined by the alarm method according to the height difference between the vehicle frame and the steel plate spring; and the overload alarm method is simple, can detect vehicle overload conditions in real time and can give on-time alarm upon overload to prevent accidents, so vehicle driving safety can be improved.

The invention discloses a culvert mouth of a corrugated steel pipe culvert. The culvert mouth comprises a main wall plate and side wall plates, wherein the main wall plate and the side wall plates are plane steel plates consisting of corrugated steel plates; reserved thread holes are formed in each plane steel plate; one ends of bar strips are connected with the main wall plate through the reserved thread holes; the other ends of the bar strips are straightened and anchored in compacted soil materials; the main wall plate is perpendicular to the cross section of a culvert body; an opening is formed in the main wall plate; the shape of the opening is matched with that of the culvert; the periphery of the opening is connected with the edge of the culvert wall of the culvert through a flange; each of two outer sides of the main wall plate is connected with one side of the corresponding side wall plate. The culvert mouth of the corrugated steel pipe culvert, disclosed by the invention, solves the problems of cracking, infirm connection, poor beauty degree and the like, caused by the uneven sedimentation of a culvert mouth in a masonry structure and a culvert pipe body; besides, the culvert mouth can be produced in a centralized manner in a factory, and the construction is rapid and convenient.