259results about How to "Strong load bearing capacity" patented technology

The invention relates to a compression spring processing process. The compression spring processing process is characterized by comprising the following process steps of: rolling, cutting into rings, reducing diameters, quenching, performing primary tempering, inspecting mechanical properties, setting, grinding end faces, correcting the length and the concentricity of springs, performing secondary tempering, setting, performing primary heating and loading aging treatment, grinding the end faces, detecting, performing sand blasting, performing magnetic powder inspection, performing sand blasting, performing surface treatment, performing secondary heating and loading aging treatment, and detecting finished products. By the process, the deformation of the springs in the processing process can be reduced, the geometric dimension of the springs is ensured, and production efficiency is greatly improved.

The invention discloses a high-strength turnout switch, and belongs to the technical field of railway assembly manufacture. The turnout switch comprises a straight basic rail and a curved point rail. The turnout switch is characterized in that: the surface, attached to the curved point rail, of the straight basic rail is a sunken vertical abutted surface; the surface, attached to the straight basic rail, of the curved point rail is a vertical abutted surface; and the rail head of the curved point rail is a flat rail head capable of being concealed in the sunken abutted surface of the straight basic rail. The turnout switch has the advantages that: the point end of the original curved point rail is widened to improve the strength of the point end of the curved point rail; and correspondingly the abutted surface of the straight basic rail is changed into the vertical abutted surface capable of accommodating the widened point end of the curved point rail, so that the transition distance from the point end of the curved point rail to the width of the complete rail head is shortened at the same time of ensuring abutting, namely the length of the weak section of the curved point rail is reduced, the load bearing capacity and the abrasion resistance of the curved point rail are improved, and the service life of the curved point rail is greatly prolonged. The turnout switch is particularly suitable to be used in heavy-duty line turnouts.

The invention belongs to the field of heat preservation materials, and in particular relates to a foamed concrete heat preservation plate and a preparation method thereof. The foamed concrete heat preservation plate comprises the following raw materials in parts by weight: 380-430 parts of a binding material, 135-160 parts of an admixture, 8-12 parts of calcium stearate, 3-6 parts of polymer gelatine powder, 0.5-3 parts of anti-cracking fibers, 1-4 parts of moisture repellent, 25-35 parts of hydrogen peroxide and 270-310 parts of water. The foamed concrete heat preservation plate is obtained by adding the raw materials into a gravity-free mixing stirrer to mix for 2-5 minutes, pouring the mixtures into a die and forming and maintaining the product. The bonding material consists of portland cement and high-alumina cement; the weight ratio of the portland cement to the high-alumina cement is (1-4):1. The foamed concrete heat preservation plate is high in tensile strength, small in density, light in weight, high in fire retardant effect and low in absorption rate; the combustion performance of the foamed concrete heat preservation plate is up to grade A1; the cost of the raw materials is low; the heat preservation plate is high in safety, and therefore, toxic gas cannot be produced even under the condition of high temperature or fire.

The invention discloses an asphalt mixture and a production method thereof and relates to the field of building materials. The asphalt mixture solves the problem that the existing asphalt mixture forthe airport runway has poor stability and anti-rutting ability, and comprises 4 to 12 wt% of modified asphalt, 72 to 88 wt% of aggregate, 5 to 10 wt% of a filler, 0.5 to 3 wt% of a fiber stabilizer and 0.5 to 3 wt% of an anti-rutting agent and has an asphalt-aggregate ratio of 5.6 to 14%. The modified asphalt comprises matrix asphalt and SBS and the weight of the SBS is 5-8 wt% that of the matrixasphalt. The asphalt mixture has the advantages of high dynamic stability, high temperature stability, strong rutting resistance and good water stability, and is suitable for airport runways.

The invention relates to a cast-in-place support for the long cantilever No. 0 block of a cable-stayed bridge with tower beam consolidation, which comprises a reassembling type truss girder falsework, an I-shaped steel distributive girder, a sleeper and a bowl-fastening piece support, wherein the reassembling type truss girder falsework is connected at the upper part of the a lower pylon column; the I-shaped steel distributive girder is laid on the reassembling type truss girder falsework; the sleeper is laid on the I-shaped steel distributive girder, and the bowl-fastening piece support is built on the sleeper. The cast-in-place support is characterized in that reassembling type truss girder falsework is formed to be an inverted trapezoid through the connection of four groups of double-beam truss group, four single-beam trusses and four oblique angled single-beam trusses. The method for putting up the cast-in-place support comprises the following steps: pre-burying a bolt sleeve; mounting a special angle iron and a special gusset plate; putting up the reassembling type truss girder falsework; laying the I-shaped steel distributive girder; laying the sleeper and putting up the bowl-fastening piece support. The invention has the advantages of long cantilever, strong load bearing capability, big stiffness, clear stress and simple and easy operation, and safety risks caused by welding defects are avoided.

The invention discloses a sound box wall hanger which comprises a sound box fixing member, a wall body fixing bracket and a vertical angle adjuster. The sound box fixing member is a Z-shaped fixing plate. One end of a horizontal section on the upper end of the sound box fixing member is fixedly connected with the top of a sound box through a screw. The other end of the horizontal section on the upper end of the sound box fixing member is connected with a long hole in the vertical angle adjuster through a screw. A vertical section of the sound box fixing member is fixedly connected with the back of the sound box through a screw. The wall body fixing bracket comprises a suspension end and a fixation end. The fixation end is fixedly connected with a wall body through a screw. Upper and lower ends of the suspension end are respectively provided with a screw hole, and screws are arranged in the screw holes. A screw hole in the vertical angle adjuster is connected with the wall body fixing bracket through the upper screw. A screw hole in a horizontal section on the lower end of the sound box fixing member is connected with the wall body fixing bracket through the lower screw. According to the invention, a support nest is changed; the problem of poor load carrying capacity, which is caused by the damaged support nest, is solved; and the sound box wall hanger has the characteristics of good force-bearing point, strong carrying capacity and easy installation.

The invention relates to a house assembled by prefabricated members, which comprises metope (column) slab prefabricated members, beam prefabricated members, floor (foundation) slab prefabricated members, roof slab prefabricated members, valley prefabricated members, staircase prefabricated members and connecting mechanisms. The overall dimension of the prefabricated members adopts a unified building module, and the prefabricated members can be assembled into various types of houses with different storey heights and can be prefabricated into standard members in advance for storage in batch. Due to the tensioning function of the connecting mechanisms, the overall stress of the assembled house is more reasonable, and simultaneously the tightening and sealing effect between the connected prefabricated members can be achieved by treating the prefabricated members through dry process. The invention shortens the construction period of building construction, and reduces the integrated cost of social construction because the prefabricated members can be disassembled and recycled. The house assembled by the prefabricated members has actual significance in the aspects of promoting resource intensification and building industrialization.

The invention relates to a method for reinforcing an existing municipal pipe gallery within a deep foundation pit excavation range, and is particularly applied to the condition of excavating a large-sized foundation pit when a municipal pipe gallery exists in a thick alluvial formation. The method comprises the following steps: constructing ordinary precast piles and pipe gallery reinforcement precast piles, wherein reserved connection devices are arranged on the pipe gallery reinforcement precast piles; excavating a foundation pit soil body from top to bottom until the reserved connection devices on the pile bodies are exposed; simultaneously pouring a pipe gallery support structure taking a soil model as a template below the pipe gallery and beams on two sides of the pipe gallery by taking the reserved connection devices of the pipe gallery reinforcement precast piles as support points; constructing anchor ropes, wherein one end of each anchor rope is anchored onto the corresponding beam, and the other end of each anchor rope is connected with a top beam on the corresponding pipe gallery reinforcement precast pile; continuing excavating the residual foundation pit soil body to a baseline of the foundation pit, constructing air duct structures, and integrally pouring waist beams of the foundation pit and air duct top plates to finish the construction. According to the method, the stability of the soil body around air ducts during the excavation of the air ducts is ensured, and the influence of excavation of the soil body on the lower part on the pipe gallery is reduced, and the pipe gallery is supported in advance.

The invention discloses a hot-rolled wire rod for manufacturing a high-strength steel strand of a strong and smart grid and a production method of the hot-rolled wire rod, and relates to a hot-rolled wire rod for manufacturing a high-strength steel strand of a grid. Chemical composition of the hot-rolled wire rod is composed of the following substances in percentage by weight (%): 0.70-0.74% of C, 0.17-0.37% of Si, 0.70-0.80% of Mn, 0.07-0.14% of Cr, less than or equal to 0.025% of P, less than or equal to 0.025% of S, less than or equal to 0.30% of Ni, less than or equal to 0.25% of Cu and the balance of Fe. According to the phi6.5mm hot-rolled wire rod produced by the method disclosed by the invention, tensile strength is 1120-1200Mpa, area reduction is 40-50% and percentage of elongation is more than or equal to 18%. The hot-rolled wire rod disclosed by the invention has the advantages that process equipment and parameter setting are reasonable, longstanding problems are solved and product quality is improved; the wire rod is drawn into a steel wire to enhance strength, and a loading bearing capacity of a steel strand processed from the steel wire is greatly improved; and the hot-rolled wire rod is easy to draw, and capable of avoiding an intermediate heat treatment process and saving energy.

The invention provides a frame which comprises a frame front section (11) and a frame rear section, wherein the frame rear section comprises a first rear section (12), a washer (13) for mounting a rotating platform and a second rear section (14) which are connected in sequence; the first rear section (12) is connected with the frame front section (11); the outer sides of both end parts of the connecting position of the washer (13) and the first rear section (12) are oppositely provided with two front hinging points (18) for connecting a front support leg device; and the outer sides of both end parts of the connecting position of the washer (13) and the second rear section (14) are oppositely provided with two rear hinging points (19) for connecting a rear support leg device. The frame provided by the invention has the advantages of small rear section box-shaped structure of the frame and light integral weight. In addition, the invention also provides a crane with the frame.

The invention provides a preparation method for a chopped silicon carbide fiber reinforced aluminosilicate polymer composite material, and relates to the preparation method for composite materials. The preparation method provided by the invention is to solve the problem of severe limitation of a conventional aluminosilicate polymer material extensively applied in the field of high-tech materials demanding a certain loading capacity and high reliability due to inherent brittleness and low mechanical strength and toughness of the conventional aluminosilicate polymer material. The preparation method for the chopped silicon carbide fiber reinforced aluminosilicate polymer composite material is realized through the following steps: 1, preparation of a raw material, i.e., active aluminosilicate; 2, preparation of a ball-milled mixture; 3, preparation of an alkali-activation solution; 4, preparation of an aluminosilicate polymer material slurry; and 5, curing. The preparation method provided by the invention is used for preparation of the chopped silicon carbide fiber reinforced aluminosilicate polymer composite material.

The invention belongs to the technical field of metal material deep processing and particularly relates to a ply rolling method for utilizing point symmetry to prepare transverse variable thickness plate strips. According to the method, the point symmetry is utilized for preparing the transverse variable thickness plate strips, the defects of waves, curve, torsion and the like caused by uneven andasymmetrical deformation in the variable thickness plate strip rolling process can be overcome, and the method can be used for preparing the various metal material transverse variable thickness platestrips. The method has the beneficial effects that adaptability to raw material texture and shape size is high, the flexibility of thickness changing of products is improved remarkably, flat rollerscan be used for carrying out rolling, the expense generated by using milling roller types is saved, the defects of waves, curve, torsion and the like caused by uneven deformation of variable thicknessrolling can be avoided, whether transition areas between thick areas and thin areas exist on the transverse variable thickness plate strips or not can be selected and designed, the shape and the position of the transition areas can selected and designed, and the best weight reducing and load bearing effects are achieved.

The invention discloses a mega column in the shape of double Chinese characters ya, which comprises H-shaped members, a partition plate, connecting plates and column baseplates, wherein the partition plate is positioned between the H-shaped members; the connecting plates are positioned at the top ends of the H-shaped members; and the column baseplate is positioned on one side of each H-shaped member. The invention further discloses a manufacturing method of the mega column in the shape of the double Chinese characters ya. The mega column in the shape of the double Chinese characters ya is ingenious in structural design and very strong in bearing capacity; in the method, the manufactured mega column in the shape of the double Chinese characters ya can be firm in structure by adjusting the welding sequence and the welding way, the factory production of the mega columns in the shape of the double Chinese characters ya is further realized, and the production efficiency is improved.

The invention discloses the reinforcement coagulate resin mortar casting tube and preparing method. The method comprises the following steps: 1 10-60% resin, 3.497-15% toughening agent, 1.5-6% plasticizing agent, 5- 80% quartz sand, 0.5-5% levelling agent, 40-3% curing agent, 0.5-5% accelerating agent, 0.003-5% defoaming agent; 2 mixing resin, plasticizing agent, quartz sand, levelling agent, curing agent and accelerating agent; 3 adding defoaming agent; 4 adding them into die with web tendon; 5 curing, stewing and mould unloading; 6 checking; 7 getting the reinforcement coagulate resin mortar casting tube. The tube is used as tube building material. The invention has the advantages of high strength, light weight, good sealing, corrosion prevention, long lifetime and low cost.

The invention relates to an internal-combustion engine and a method for operating internal-combustion engine, comprising a main combustion chamber (2) and a precombustion chamber (4) connected with the main combustion chamber through at least an opening (5). A gas nozzle (7) connected on a high pressure gas pipeline is disposed in the precombustion chamber, and the gas nozzle is used for injecting gas into the precombustion chamber in high pressure and mixing the gas with the thin gas-air mixture in the precombustion chamber. The internal-combustion engine also comprises an ignition unit (6) stretched into the precombustion chamber to fire the thick gas-air mixture. At least one nozzle (9, 10) is arranged in the precombustion chamber for leading air and/or waste gas into the precombustion chamber and mixing the gas with the thin gas-air mixture in the precombustion chamber before the gas nozzle leads the gas, thereby the limited non-flammable gas-air mixture exists before the gas nozzle leads the gas, and the limited ignitable gas-air mixture exists after the gas nozzle leads the gas.

The invention relates to the field of a bearing, in particular to a static combined bearing for a screw rod. The static combined bearing comprises an oil supply device used for supplying oil through a throttler and is characterized in that the static combined bearing is provided with a static bearing, a rolling needle bearing, a locking screw nut, a front separation sleeve, a back separation sleeve and regulating pads, a step groove is arranged in the inner circumferential direction of the static bearing, an outer ring of the rolling needle bearing is fixedly arranged in the step groove, the outer ring of the rolling needle bearing is tightly pressed in the axial direction and the radial direction through the static bearing surrounded at the outer side, the front end of an inner circle of the rolling needle bearing is tightly pressed through the front separation sleeve, the back end of the inner circle of the rolling needle bearing is tightly pressed through the back separation sleeve, positions of the side surface of the static bearing, corresponding to the front separation sleeve and the back separation sleeve, are provided with oil discharge openings, annular oil grooves are respectively arranged on two end surfaces of the static bearing, two ends of the static bearing are respectively and tightly pressed with the regulating pads through the locking screw nut, and the annular oil grooves form annular oil cavities through the regulating pads and are communicated with the throttler and the oil supply device through oil supply openings arranged on the static bearing. Therefore, lubricating oil films with sufficient pressure are respectively formed at two sides of the static combined bearing, simultaneously, the static bearing and the front and back regulating pad form liquid friction, the influence caused by terminal deformation on the rotation precision of the screw rod is reduced, the axial load bearing capability is greatly enhanced, and the service life is greatly prolonged.

The present invention discloses an equal-channel deformation mould for preparing block-body ultra fine grain metal. Said equal-channel deformation mould includes the following several portions: pressure rod, upper mould, fastening sleeve, lower mould and base seat, in the upper mould interior and lower mould interior are respectively cut two crossed equal-diameter channels. Besides, said invention also provides the concrete structure of above-mentioned every portion, and also provides the concrete application method of said equal-channel deformation mould.

The invention provides a wheel retaining tool having a high rotation precision and an elongated life and a manufacturing method thereof. The method for manufacturing the retaining tool includes steps of: processing the supporting parts 2 which are opposite leftward and rightward with a groove 1 as an interval, a cylindrical installing hole 5 formed by running through the left and right supporting parts 2 and a metallic retaining tool body 3 of a shield installing hole 6 in parallel with the cylindrical installing hole 5; installing a cylinder 4 made of the superhard material in the cylindrical installing hole 5 of the retaining tool body 3; enabling a wire 8a of a wire discharge processing machine 8 to pass through the shield installing hole 6 and moving from the shield installing hole 6 to the cylinder 4 and processing a pin insertion hole 9 at an axle center part of the cylinder 4 in a discharge processing way; and cutting off a middle part of the cylinder 4 in the groove 1 to process a gap 10 placing the knife flywheel A.

The invention discloses an environment-friendly asphalt mixture additive and a preparation method thereof. The environment-friendly asphalt mixture additive is prepared from, by weight, 55%-90% of powdery solids, 7%-20% of polyethylene, 1%-5% of a fluorocarbon surfactant, 1%-10% of Kaloamine and 1%-10% of alkyl glycoside. The preparation method comprises the following steps that the powdery materials, polyethylene, the fluorocarbon surfactant, Kaloamine and alkyl glycoside are put into a screw extruder in proportion, mixed to be uniform and extruded to obtain a finished product, and then the asphalt mixture additive is obtained. According to the asphalt mixture additive, the powdery solids generated after thermal extraction treatment of oily sludge can be fully reused and can be put into asphalt mixture production by replacing ore powder, environmental pollution is reduced, the cost is reduced, the rutting deformation resistance of the asphalt mixture is improved, and the service life of a pavement can be prolonged.