122results about How to "Improve strength utilization" patented technology

The invention discloses a local double-layer string reticulated spherical shell, comprising an upper layer, a middle layer and a lower layer, wherein, the upper layer is a spherical surface which consists of radial bars and circumferential bars and is arranged in a heel ring grid shape, a plurality of circumferential bars are connected to form the woof of the spherical surface, radial bars are connected between connections of the radial bars of two adjacent woofs to form the warp of the spherical surface, the connections of the circumferential bars are connected with one ends of the radial bars, while the other ends of the radial bars are hinged with the top point in the center of the spherical shell; the middle layer comprises a plurality of unit pyramids which are uniformly and alternately arranged on the heel ring grid of the upper layer along the warp direction and the woof direction and have cone tops connected with circumferential ropes of the lower layer; and the circumferential ropes are in closed arrangement along the circumferential direction, and inherent stress is exerted through tensioning the circumferential ropes in the structure. The local double-layer string reticulated spherical shell has the advantages of clear structure stress, concise and permeable construction effect, is a self equilibrating system under the deadweight effect without horizontal thrust, and has each upper chord joint provided with a web member so as to improve the stability of the structure.

The invention discloses a greenhouse with an adjustable light reflection device. The greenhouse comprises the adjustable light reflection device, a light-transmission layer, a heat preservation enclosing structure and a movable heat preservation quilt. The adjustable light reflection device is located in the greenhouse and close to the north face of the greenhouse. The movable heat preservation quilt is arranged on the light-transmission layer. The adjustable light reflection device comprises a plurality of reflector modules, a left supporting rod, a right supporting rod, a traction chain, driving gears and a motor cabinet. The reflector modules are parallelly placed in the vertical direction and connected with the traction chain through the gears. A motor in the motor cabinet drives the driving gears to rotate so as to adjust reflector angles. By adoption of the greenhouse, the solar energy utilization rate of the unit floor area is increased, meanwhile, the intensity of sunlight received by plants is improved, the heat preservation performance and the sunlight uniformity of the greenhouse are ensured, and the greenhouse is simple in structure, low in cost, attractive in appearance, and large in popularization potentiality.

The invention relates to a fiber reinforced plastic (FRP)-concrete composite beam, which belongs to the technical field of bridge engineering. The composite beam comprises a box-shaped FRP beam or an I-shaped FRP beam, a shear connector and an FRP rib concrete slab, wherein the box-shaped FRP or the I-shaped FRP beam consists of a top flange, a lower flange and a web plate; the shear connector consists of fine stones, an adhesive or FRP shear nails and is arranged on the top flange of the FRP beam; and the FRP rib concrete slab consists of concrete, longitudinal FRP ribs and horizontal FRP ribs and is positioned above the top flange of the FRP beam. By optimally combining the tensile property of an FRP material with the compressive property of a concrete material and taking simple and reliable shear connection measures, a steel-free composite beam is realized; and the composite beam has the advantages of corrosion resistance, high rigidity, fatigue resistance, low cost and the like, is easy and convenient to construct, and is a novel choice for modern bridge construction.

The invention relates to a conveyer belt taking a warp-knitted bi-axial fabric as a framework and a manufacturing method thereof. The conveyer belt sequentially comprises a woven fabric, a polyvinyl chloride laminated layer, the warp-knitted bi-axial fabric and a polyvinyl chloride surface layer from bottom to top. The manufacturing method comprises the following steps of: finalizing the design of the woven fabric, carrying out primary coat, and coating polyvinyl chloride paste resin to form the laminated layer; finalizing the design of the warp-knitted bi-axial fabric, jointing with the woven fabric of the bottom layer; and carrying out surface layer coating on the warp-knitted bi-axial fabric to form the conveyer belt structure of a double-framework double- polyvinyl chloride layer. The utilization rate of the intensity of warp in the warp-knitted bi-axial fabric reaches the highest, and the warp is always in a straight state and does not have creep relaxation. Self-cementing between the PVC (polyvinyl chloride) surface layer and the PVC laminated layer can be formed, the primary coat process is left out, the racking strength is greatly enhanced, the requirements on roll diameter and tension length of a conveyer are reduced, the service life is improved, and the cost is 40% lower than the woven fabric.

The invention discloses a cast-in-place concrete hollow five-star shaped pile with large diameter and a construction method and a special device thereof. The side surface of the pile consists of an angular plane of the pile which is formed in intersection and arc-shaped curved surface depressed into the pile and connected with the plane smoothly. The cross section of the pile is hollow five-star shaped. A five-star shaped hollow steel sleeve is infiltrated to the foundation to designed depth by vibrating an immersed tube and then concrete is casted in a cavity of the inner and outer steel sleeves and the tube is drawn by vibration to form the cast-in-place concrete hollow five-star shaped pile with large diameter. The invention further relates to the special device of the construction method of the concrete pile. The cast-in-place concrete hollow five-star shaped pile with large diameter is a thin-wall abnormal pile which is rigid, has high strength, large processing depth, simple process, and strong maneuverability and is convenient to control the quality, monitor, and has high bearing capacity and low cost. The special device has a simple structure and is convenient and flexible to operate.

The invention discloses an all-steel tubeless radial tire with a high load performance and a manufacturing method thereof. A rectangular bead ring is arranged in a compound bead ring; a section designangle is adopted by a profile curve at the bottom of a bead base; a tangent design angle is adopted by the profile curve of a tire bead heel; a sizing material is thickened on a contact position of the bead heel and the rim; binding rubber slices are arranged at two endpoints of a tire cord fabric and a reinforced cord fabric; the height of reverse binding sections of the binding rubber slices isarranged close to the height H1 of a horizontal shaft; an upper filling glue and a lower filling glue for isolation are successively arranged between the reverse binding sections of the binding rubber slices and the tire body from top to bottom; a U-shaped reinforced cord fabric layer is paved on the outer layer of the tire cord fabric; an inside liner and a sidewall compound piece are respectively arranged on the inner and outer sides of the reinforced cord fabric. The bead ring is stable in construction, is free from deformation under a stressed state and is high in strength use ratio; thebottom of the bead ring is in surface contact with the rim; the stress is uniform and the load resistance is promoted; the stress between the tire body and the tire cord fabric is buffered by the isolating rubber slices; the loading capacity is promoted by the reinforced cord fabric.

The invention relates to a large-span bridge elastic-plastic damping system. The large-span bridge elastic-plastic damping system comprises damping cable pairs composed of elastic-plastic damping cables and a transverse viscous damper. The two damping cable pairs are arranged, one ends of the damping cable pairs are anchored on anchoring blocks integrally cast with a main beam of a bridge, the other ends of the damping cable pairs are anchored on main tower columns on the other sides, and the two damping cable pairs are symmetrically arranged. One end of the viscous damper is anchored on the bottom of the main beam, and the other end of the viscous damper is anchored on a main tower cross beam of the bridge. The damping system can provide enough restraint rigidity and bearing force under the normal use condition, has enough deformation capacity and energy consumption under the strong earthquake condition, and can remarkably improve the anti-seismic performance of the large-span bridge in a highly seismic region.

The invention discloses a coal gangue novel lightweight wall material and a preparation method thereof. The novel lightweight wall material is prepared from the raw materials by mass percent of 43-84.5% of coal gangue, 5-20% of fluxing agent, 0.5-2% of foaming agent and 10-35% of perlite by the steps of mixing, spray granulation, die filling and sintering. The wall material disclosed by the invention has the characteristics of light weight and high impact strength and a lightweight, thermal-insulation, durable and environment-friendly novel lightweight wall material, wherein the volume weight is 250-290kg/m<3> and the impact strength is not lower than 2kJ/m<2>.

The magnetic dry lean iron ore separating machine has one double-layered frame. The lower layer of horizontal frame has one magnetic wheel set on one end, one driven wheel on the other end, one belt conveyer between the magnetic wheel and the driven wheel and one feeding bin over the driven wheel. The upper layer triangular frame has one driving wheel on one end, one magnetic wheel on the other end, one driven wheel in the upper part, one belt conveyer with tightening wheel to connect the driving wheel, the magnetic wheel and the driven wheel, and permanent magnets to form suspending magnetic field inside the conveying belt between the driving wheel and the magnetic wheel. The present invention has combined magnetic field structure, increased contact area between the material and the magnetic field, raised magnetic field utilization rate, and excellent separating effect, and is especially suitable for magnetic separation of lean iron ore.

The invention relates to an elastic-plastic damping cable for transverse damping of a large-span bridge. Redundant design is adopted for inhaul cable anchoring, and a redundant cable wire reinforcing segment is additionally arranged between an anchoring zone and an effective cable segment. The number of cable wires in the anchoring zone and the reinforcing segment is larger than that of effective cable wires, redundant cable wires are cut off in the effective cable segment, a tension resisting capacity level difference between the anchoring zone and the reinforcing segment, and the effective cable segment is formed, and thus it is avoided that potential weak and destructive links occur in the anchoring zone or the reinforcing segment. Damping cables can provide sufficient restraint rigidity and bearing capacity under the normal use condition and have sufficient deformability and energy dissipation capacity under the strong earthquake condition, and therefore the seismic performance of the large-span bridge in a strong earthquake area can be significantly improved.

The present invention discloses a novel carbon fiber composite material, which comprises, by weight, 30-34 parts of carbon fiber, 21-27 parts of epoxy resin, 17-24 parts of aqueous epoxy resin emulsion, 14-20 parts of an accelerator, 10-15 parts of a toughening agent and 1-3 parts of a curing agent. The material is able to meet the requirements of carbon fiber composite rope matrix resin, and has high comprehensive utilization of fiber strength; and the addition of aqueous epoxy resin emulsion effectively protects the carbon fiber, avoids the friction and wear between the fiber bundles, and enhances the bending resistance of the composite material.

The invention provides a plastic-coated water skiing rope main rope. The plastic-coated water skiing rope main rope comprises a woven rope layer, a heat insulation layer and a plastic-coated layer; heat-resistant polymer fabric, non-woven fabric, a film or glass fiber cloth is adopted between the woven rope layer and the plastic-coated layer to serve as the heat insulation layer, and the thickness of the heat insulation layer is smaller than 0.5 mm; the plastic-coated layer is formed by melting and extruding raw materials and then uniformly coats the outer part of the heat insulation layer; the woven rope layer comprises a rope sheath and a rope core; the rope sheath is tightly coated outside the rope core; the rope sheath is woven into a tubular structure by adopting a weft guide knitted belt; the rope core consists of at least one three-strand twisted thread or a plurality of parallel yarns; and the diameter of the water skiing rope main rope is 4-8mm. The the water skiing rope main rope has the characteristics of high strength, small extension and the like, and the diameter can be greatly reduced under the condition of ensuring the strength.

The invention relates to a dual-arc steel section structure design method, in particular to a structure design method for a transmission tower material in the electric power transmission process. The dual-arc steel section structure of the scheme comprises a vertex angle and a limb plate, wherein the vertex angle is a flat reinforcing plate, and the connecting part of the limb plate and the reinforcing plate is in a relative S-shaped arc section. By adopting the cold-bending technology, a reasonable section shape in the optimized material distribution can be produced according to the need; and with the help of the advantages of the traditional hot-rolled angle steel and by combining the cold-bending technology, the dual-arc steel section structure of the scheme adopts a double S-shaped radian design, the ratio of the free extension length to the thickness of a flange plate can be optimized according to the need, the steel strength reduction due to stable strength is reduced, and the strength utilization ratio of member materials is improved. Compared with the traditional hot-rolled angle steel, the structure has better section characteristics through the arc design of the connecting points and the angle-strengthened protruding cold-bending processing, and the section bearing capacity is greatly improved.

The invention discloses an obstacle-crossing wall-climbing robot combined variable magnetic force attraction module. The obstacle-crossing wall-climbing robot combined variable magnetic force attraction module comprises a screw assembly and an attraction assembly; the screw assembly adopts a motor-belt wheel-belt-belt wheel-screw nut-screw power transmission mode so that a screw nut can drive a screw to move up and down, and accordingly, the attraction assembly is driven to move outside a vehicle frame up and down. The problem that when an existing permanent-magnetic wall-climbing robot operates on a large-size metal vertical face, the magnetic force cannot be changed is solved; through application of reverse motion of a screw mechanism, a permanent-magnetic attraction mechanism of the previous permanent-magnetic wall-climbing robot is perfected, thus, the magnetic force of a magnet can be changed along with changing of the shape of a wall obstacle in the robot obstacle crossing process, and the all-terrain adaptability is more excellent; magnetic induction line distribution of the combined variable magnetic force attraction module is improved, and the stability and safety of the robot in the operating process are improved; and by applying an electromagnet, the attraction force generated by the combined variable magnetic force attraction module can be adjusted more easily.

The invention discloses a high-density flat carbon fiber gradient stitching preform and a preparation method thereof, and belongs to the field of equipment materials. According to the method, the flat carbon fiber bundles are adopted and woven into the light and thin single-layer flat carbon fiber plane prefabricated body, and then the flat carbon fiber gradient stitching prefabricated body is prepared through gradient lamination and stitching, so that the requirements of high layer density, high bearing capacity, strong interlayer and low stitching damage are met; and the problems of high porosity, high cost, long period, frequent processing and low mechanical property retention rate of the subsequent carbon/carbon composite material are thoroughly solved.

The invention discloses a building pile foundation project and a construction method thereof, in particular a method for enlarging pedestal and forming pile of an immersed tube precast reinforced concrete pedestal pile; the method comprises the following steps that: the immersed tube is passed through a soft earth layer and pressed to a designed level hard earth layer; a metal pile head is taken out, and put into the immersed tube to enlarge the pedestal; the earth is extracted by a device which uses air to absorb earth, when a small amount of earth is left in a base, water is poured from the mouth of the immersed tube, the water is absorbed while the poured until the earth is completed absorbed; radial reinforcing steel bars are arranged in the cavity of the base, and the hard earth is hammered into the cavity of the base, the concrete precast on the ground is filled in a long barrel and the barrel is put to the bottom of the immersed tube from the mouth of the immersed tube, when iron bars arranged on the bottom of the barrel touch the hard earth, the bottom gate of the barrel is forced open, then the concrete falls into the cavity of the base to form a cast-in-situ base, the precast reinforced concrete pile body is sunk and in even joint with the cast-in-situ base through the dowel bars of the reinforced concrete pile body to be jointed and anchored into a whole; the immersed tube is extracted out and the pile is formed. The invention extracts earth completely without granular loose earth, has high efficiency, improves the bearing capacity of single pile effectively and meets the design requirements, thereby ensuring the quality of the pile foundation work project and reducing construction cost.

The invention discloses a construction pile foundation project and a method for constructing the same, in particular a method for explosively expanding bottom and forming pile through immersed tube prefabrication steel concrete. The method comprises the following steps that: an immersed tube is pressed into a firm ground layer with a designed height; a metal pile head is taken out, emulsified oils or ammonium-antimony detonators are put into the immersed tube through the immersed tube orifice, and then the immersed tube orifice is sealed after the detonators are detonated; soil is taken out by using an air absorption soil device; whether the quality reaches the designed specification is checked by a camera with the light source in the base cavity; radial reinforcing steel bars are put into the base cavity and are hammered into the firm ground, stiff cement mortars which are prepared well on the ground are poured into the base cavity along the immersed tube orifice, and then carpolites are poured into the base cavity and a concrete base without sands is formed, the prestressing prefabrication hollow pile body which is put into the concrete base and the cast-in-place concrete base are butt jointed and anchor fixed to form a whole through the inserted reinforcing steel bars at the bottom of the concrete base; the immersed tube is pulled out, and then cement mortars are poured into along the gap which is formed after the immersed tube is pulled out, and then a pile is formed. The invention has the advantages that soil is cleanly taken out without granular loose soil and the efficiency is high.

An embodiment of the invention discloses a manufacturing method of a high-strength ultrahigh molecular weight polyethylene fiber rope. The manufacturing method comprises the following steps of selecting a plurality of ultrahigh molecular weight polyethylene fibers with the set specifications for initial twisting, and applying tension at the strength of 0.034-0.104g/tex to the ultrahigh molecular weight polyethylene fibers in the initial twisting process, and carrying out initial twisting heat setting treatment to obtain ultrahigh molecular weight polyethylene rope yarns; carrying out re-twisting on the ultrahigh molecular weight polyethylene rope yarns, and applying tension at the strength of 0.153-0.198g/tex to the ultrahigh molecular weight polyethylene rope yarns in the re-twisting process, and carrying out re-twisting heat setting treatment to obtain ultrahigh molecular weight polyethylene re-twisted rope strands; and weaving the ultrahigh molecular weight polyethylene re-twisted rope strands into a rope, applying tension at the strength of 0.208-0.495g/tex to the ultrahigh molecular weight polyethylene re-twisted rope strands, and carrying out weaving heat setting treatment.