44results about How to "Lightweight construction" patented technology

The invention discloses a three-roller inclined rolling forming method of rail vehicle axles. The method is characterized in that rods are heated and fed into a three-roller inclined rolling machine through an axial pushing device; three inclined rollers are engaged with the rods at the same time, and drive the rods to rotate; meanwhile, the axial pushing device pushes the rods to axially move ata constant speed; a radial driving mechanism controls radial movement of the inclined rollers according to diameter requirements of rail vehicle axles needing to be machined; when the rods axially move to contact with an axial guide device, the axial guide device tows the rods to continuously move axially at a constant speed; meanwhile, the rods are deviated from the axial pushing device; and after machining is finished, large-diameter long step shafts-rail vehicle axles are obtained. The method has the advantages of simple mold manufacturing, uniform distribution of force on the surfaces of rolled parts, capability of effectively reducing wear of the rollers in the inclined rolling process, capability of realizing light construction of the rolling machine and effective prolonging of the service life of the rolling machine.

The invention relates to a connecting device for connecting modular steel frames. The connecting device at least comprises first square steel tube columns and second square steel tube columns. The ends of the first square steel tube columns and the ends of the second square steel tube columns are hollow. The first square steel tube columns and the second square steel tube columns are connected through inner sleeves, the inner sleeves are in clearance fit with the first square steel tube columns and the second square steel tube columns, positioning blocks and bearing steel angles are arranged on the peripheral rings of the inner sleeves, the positioning blocks are located below the bearing steel angles, the lower edges of the positioning blocks are parallel to column openings of the first square steel tube columns, and the bearing surfaces of the bearing steel angles are parallel to column openings of the second square steel tube columns. The modular steel frames are partially machined in a factory in advance and then constructed on a construction site, the procedures of site construction are greatly reduced, the construction time is shortened, and the environment on site is not excessively influenced; the modular steel frames are welded to the inner sleeves, the firmness degree between the frames is greatly enhanced, and the risk caused by screw or bolt looseness is avoided.

The invention relates to a modular steel frame connection device. the modular steel frame connection device at least comprises a first square steel tubular column and a second square steel tubular column which are internally hollow and are connected through an inner sleeve. The inner sleeve is in clearance fit with the second square steel tubular column. the periphery of the inner sleeve is annularly provided with locating blocks parallel to the column opening of the first square steel tubular column and the column opening of the second square steel tubular column. the modular steel frame connection device further comprises a connection plate provided with an assembly hole matched with the inner sleeve. modular steel frames are connected in an inner sleeve mode, the fixing mode of screws or bolts is omitted, procedures of site construction are omitted, and the construction time is shortened. the modular steel frames and inner sleeves are welded, the firm degree between the frames is enhanced, and risks caused by loosening of the screws or the bolts are avoided. The modular steel frames are partially machined in a factory in advance and then constructed in a construction site, so that the site construction time is shortened greatly, and too many influences on the site environment are avoided.

The present invention relates to a light-type vertically-turning opening bridge. It includes a main frame, said main frame is composed of oblique tower and bridge floor, said oblique tower is connected with one end of said bridge floor, and said one end where the oblique tower and bridge floor are mutually connected is set on the base seat and is turnably connected with said base seat, between said oblique tower and bridge floor an oblique guy rope is set and two ends of said oblique guy rope are respectively connected with said oblique tower and bridge floor, on the main frame a balance weight block is set, and said balance weight block can be slidden on said main frame.

An exercise device including a hollow body having openings into which a user may repeatedly push vertical and horizontal legs. The vertical leg has a saddle at its top for engagement with the chest of a user and contains a bellows for resisting the user's efforts to push the vertical leg into the hollow body with his chest. The horizontal legs have cradles at their outer ends for engaging the thighs of a user and contain bellows for resisting the user's efforts push the horizontal legs into the hollow body with his thighs. Valves associated with the bellows permit the force required to push the vertical and horizontal legs into the hollow body to be varied

The invention relates to a high-voltage power switch having an interrupter unit (14), a starting resistor (18), and a switch (15) connected in series with the starting resistor (18). The interrupter unit (14) comprises a first interrupter contact (32) displaceable along an axis (A1) and driven, acting together with a second interrupter contact (33) disposed on the axis (A1) to open and close the high-voltage power switch. The switch (15) comprises a switch contact (46) pivotable about a pivot axis (D), the pivoting motion of which is coupled to the motion of the first interrupter contact (32) along the axis (A1) by means of a link motion (60).

The invention relates to a shifting device of a motor vehicle change-speed gearbox comprising a selector shaft, a housing part on which said selector shaft can be rotatably mounted, an engaging unit for securing the selected positions, which comprises an engaging contour on a first engaging component and a second engaging component with an engaging element. Said components can be moved relative to each other and are locked counter to each other. Said motor vehicle change-speed gearbox also comprises a control sleeve which is arranged on the selector shaft.

The invention relates to a light-weight indoor floor leveling mortar, which comprises the following components in proportion by weight: 30-35 ordinary portland cement, 4-5 hydrated lime, 5-8 light aggregate, 55-60 heavy aggregate (ordinary river sand) and 1.0 compound additive, wherein the light aggregate is an inorganic vitrified hollow cellular material of which the fineness is lower than 100 meshes; and the compound additive can be prepared by mixing 0.1 part by weight of dispersible latex powder, 0.3 part by weight of cellulose ether, 0.5 part by weight of water reducing agent and 0.1 part by weight of coagulant agent. The construction method comprises the following steps: watering the mortar with water which is 30-50% of the mortar in weight, mechanically or manually mixing until the mortar and water are evenly mixed and achieve the viscosity, and carrying out mechanical spray coating or manual construction. The mortar of the invention has light weight, self-leveling performance, good smoothness, easy toweling, rapid construction, simple and practical process, low cost of unit area and popularization value, is favorable to mechanized construction, lightens the load quantity of a building body, improves the safety earthquake-resistant performance of the construction, achieves leveling thickness rapidly once, and is very suitable for leveling the floor of the bottom surface of a light weight floor material, such as a wood floor and the like.

The invention discloses a prestressed light pile for rapidly anchoring an emergency bridge inhaul cable and a construction method of the prestressed light pile. The light pile comprises a hollow pilebody and a pile cap which is arranged at the upper end of the pile body and is in interference fit with the pile body, and the pile body is composed of an outer pipe, a middle pipe and an inner pipe.The construction method of the light pile comprises the steps that drilling is conducted, the outer pipe provided with a clamp is inserted into the hole, a spiral drilling machine is moved away, an outer spiral pipe clamp is removed, then the middle pipe and the inner pipe are sequentially driven in, after the inner pipe is driven in, the composite middle pipe expands circumferentially, the outerpipe is forced to extrude rock around the pile, circumferential pre-tightening force is generated, the anti-pulling bearing capacity of the anchoring pile is improved, finally, the prefabricated steelpile cap in interference fit is driven into the inner pipe, and the emergency bridge inhaul cable is anchored on the pile cap. The light pile is made of a light aluminum alloy and a composite, and the transport cost is lowered; and through threads on the composite middle pipe and the outer pipe, the anti-pulling bearing capacity of the pile body and pile-soil is improved, the light pile is drivenin on site and used immediately, and the requirements of an emergency bridge are met.

The invention relates to the field of arch bridge construction, and particularly relates to a large-span arch bridge cantilever pouring arching control method. The method comprises the steps of firstly, constructing a junction pier, and arranging a plurality of buckle cable anchoring points at different positions on the junction pier according to stress requirements, wherein each buckle cable anchoring point is connected with a buckle cable; constructing arch feet at the left end and the right end of the arch bridge, then sequentially casting each main arch section in a cantilever mode from arch feet at the left end and the right end of the arch bridge, constructing main arch stand columns on one formed main arch section located at the left end of the arch bridge and one formed main arch section located at the right end of the arch bridge respectively in the construction process, arranging buckling towers at the top of the stand columns, and arranging a plurality of steering saddles onthe buckling towers; and anchoring the buckle cable at the buckle cable anchoring point on the junction pier through the steering saddle on the buckling tower, and continuing cantilever pouring of the main arch section till closure. The stability of the buckling tower in the construction process is guaranteed, the construction precision of the arch ring is also guaranteed, and the light-weight trend of the large-span arch bridge construction can be facilitated.

The invention discloses a lightweight movable wall body with a gypsum board light-gauge steel frame system. The lightweight movable wall body with the gypsum board light-gauge steel frame system comprises a movable wall body (10) and at least two guide rails (20) arranged parallel to the top of the movable wall body (10), wherein the movable wall body (10) comprises a frame main body, a first gypsum board (11) and a second gypsum board (12); the first gypsum board (11) and the second gypsum board (12) are used for sealing the frame main body; the frame main body comprises a top plate (13), a bottom plate (14), 3-15 vertical studs and 3-15 horizontal core-through beams; the top plate (13) is provided with at least two universal rolling wheels (30); the at least two universal rolling wheels(30) are separately and correspondingly connected to the at least two guide rails; the universal rolling wheels (30) slide along the guide rails; and the bottom plate (14) is evenly provided with at least three load-bearing rolling wheels (40) at equal intervals.

The invention relates to the field of reinforced concrete arch bridges, and particularly relates to a main arch arching process of main arch single-rib staggered cantilever pouring. Two single-box-shaped arch ribs are arranged on the left side and the right side of a double-side arch bridge respectively to form arch rings of the left side bridge and the right side bridge respectively; and duringconstruction, the main arch arching process comprises the steps that firstly, the two arch ribs on the inner side of the double-side arch bridge are poured in a cantilever mode till the two arch ribson the inner side are closed; 2, two arch ribs on the outer side of the double-width arch bridge are poured in a cantilever mode till the two arch ribs on the outer side are closed, and arch rings ofthe left side bridge and the right side bridge are formed respectively. The main arch ring comprises the two single-box-shaped arch ribs, the arch ribs in the arch ring are subjected to independent pouring construction, the cross section size of the arch ribs is reduced, the segment pouring weight is small, and the process is suitable for light construction of the large-span arch bridge.

The invention discloses a high-strength large deformation carbon fiber composite board and a preparation method thereof. The high-strength and large-deformation carbon fiber composite board is composed of an elliptical core, carbon fiber sheaths and a carbon fiber screw button. The core can be realized by a 3D printer for shaping the carbon fiber sheath to a wave shape, and the elliptical core iswrapped by a plurality of sets of carbon fiber sheaths, each set of carbon fiber sheaths is made of a pair of equal-width carbon fiber strips and bonded to the surface of the core by epoxy resin glue,the pair of carbon fiber sheaths are wound to the carbon fiber screw button at both ends of the core to prevent peeling of the outer edges of the carbon fiber and disengaging between the sheath and the core; finally, the wrapped and wrapped carbon fiber composite structure is soaked in the epoxy resin glue, and the carbon fiber composite board is obtained after curing. The carbon fiber compositeboard materials of the invention are light and high in strength, have large tensile strength and large deformation capability, and the stress/strain property of deformation can be pre-designed by printing the different core structures.

The invention discloses a lightweight fabricated reinforced box-groove-shaped fiber reinforced polymer (FRP) profile and sea sand concrete beam. The fabricated beam is jointly composed of a middle FRPhollow box-groove section beam section and a pre-poured concrete filled beam section at both ends. The middle FRP hollow box-groove section beam section comprises a lower FRP box chamber and an upperFRP groove, a box-groove partition plate between the lower hollow box chamber and the upper groove adopts an FRP corrugated plate, and corrugations on the plate are used as shear-resisting connectingkeys between an FRP and the concrete. According to the lightweight fabricated reinforced box-groove-shaped FRP profile and sea sand concrete beam, the beam weight is decreased through the two aspectsof materials and structure, transportation is convenient, fast and reliable connection can be achieved with the plate and the column, construction is convenient and fast, good adaptability to severeengineering environments with severe corrosion such as coastal ports is achieved, and the good social and economic benefits and engineering application prospects are achieved.

The invention relates to a fabricated box and slot type FRP sectional material light fiber sea sand concrete beam. A main body of a fabricated beam is constituted by an FRP hollow box and slot sectionbeam section in the middle and precast concrete filled beam sections at the two ends jointly; and the FRP hollow box and slot section beam section in the middle comprises a lower FRP box chamber andan upper FRP slot, an FRP corrugated plate is adopted as a box and slot partition plate between the lower hollow box chamber and the upper slot, and on-plate corrugations are adopted as anti-shear connecting keys between FRP and concrete. According to the main body of the fabricated beam, the self-weight of a beam body is reduced from the two aspects of material and structure, thus transporting isconvenient, the beam can be quickly and reliably connected with the plate and a column, construction is easy, convenient and rapid, good adaptability to the severe engineering environments, with serious corrosivity, such as coastal ports is achieved, and good social and economic benefits and engineering application prospects are achieved.