30results about How to "Lower Lifetime Costs" patented technology

The invention relates to a method for enhancing bituminous mixtures by adopting chopped basalt fibers, belonging to the technical field of novel compound materials. According to the invention, continuous basalt protofilaments or twistless rovings the surfaces of which are expanded into fibers in certain length, and then the fibers are used for enhancing the bituminous mixtures in a certain doping proportion and can be respectively used for maintaining the bituminous mixtures used for new construction and reconstruction and extension of highways and SMA and OGFC bituminous mixtures as well as fiber seals. In addition, the fibers can also be used for the enhancement of high-speed railway packing layer CA mortar and relevant hydraulic architectures. The chopped basalt fiber plays roles of enhancing, toughening and elasticizing the cracking prevention, crack resistance and reinforcement and 'bridging' in the enhanced bituminous mixtures, can obviously increase the anti-rutting ability of highways of the enhanced bituminous mixtures and reduces the whole life costs of the enhanced bituminous mixtures; if the fibers are used for high-speed railway plate-type ballastless tracks and CA mortar, the bending strength and the deformation resistance can be increased, i.e. the fibers play a role of crack prevention and crack resistance; in addition, the fibers have better anti-water leakage action if being used for Hydraulic and Hydro-Power Engineering.

The invention relates to a method for assessing concrete structure durability life prolonged by a concrete surface coating. The method mainly comprises the following steps that 1, a concrete specimenis prepared, and maintenance is conducted; 2, after the specimen is subjected to surface dry, part of the specimen is covered with the concrete surface coating, and the other part of the specimen is not covered with concrete surface coatings; 3, after the coating is cured, the concrete specimen is placed in a chlorine salt environment for exposure; 4, after exposure is conducted for different ages, the specimen is taken out, chlorine ion depth distribution in a protection layer is measured, and a chlorine ion diffusion coefficient is calculated; 5, according to a Fick's second law, the concrete structure durability life prolonged by the concrete surface coating is assessed quantificationally. The method for assessing the concrete structure durability life prolonged by the concrete surfacecoating has the advantages that by means of the method, the concrete structure durability life prolonged by the concrete surface coating can be assessed quantificationally, the coating protection lifeis precisely designed, and the durability and the service safety of a concrete structure are guaranteed.

The invention discloses an eddy current axial damper. The eddy current axial damper comprises a screw, a nut, a fixed drum, an inner rotating drum and an outer rotating drum. The fixed drum sleeves the outer side of the screw. The inner rotating drum is connected with the nut and arranged between the screw and the fixed drum in a sleeving mode. Magnets are arranged on the periphery of the inner rotating drum, and a conductor pipe is arranged on the inner wall of the fixed drum. The outer rotating drum is connected with the nut and sleeves the outer side of the fixed drum. A conductor pipe is arranged on the inner wall of the outer rotating drum, and magnets are arranged on the periphery of the fixed drum. According to the eddy current axial damper, two sets of module connection are formedbetween the inner rotating drum and the fixed drum and between the outer rotating drum and the fixed drum, the sizes are not mutually affected, the parts can be independently designed, and modularizedproduction and combination are achieved. By means of multiple combination modes such as inner and outer rotation, inner rotation and outer rotation, the requirements for the damper size limitation, the damping force inertia force change mode and the heat dissipation efficiency are met. The structure comprises a movement conversion mechanism and an eddy current damping generator. The eddy currentdamping generator is free of the frictional loss, after the service life of the damper ends, only the movement conversion mechanism needs to be replaced, the eddy current damping generator can continue to be used, and therefore the life cycle cost is reduced.

The invention discloses profile steel which comprises an upper flange plate and a web plate, and the end of the upper flange plate and/or the end of the web plate extend/extends outwards to form an extending section. The invention further discloses profile steel which comprises an upper flange plate, a web plate and a lower flange plate, and the end of at least one of the upper flange plate, the web plate and the lower flange plate extends outwards to be provided with an extending section. The invention further provides a profile steel-UHPC composite plate which comprises a UHPC plate and a plurality of profile steel, wherein the UHPC plate is arranged on the upper flange plate of the profile steel. The invention further provides a bridge deck slab and a steel-UHPC composite beam bridge. The structure of the end of the profile steel is optimized, and the end of the profile steel is provided with the outer extending section, so that when the profile steel-UHPC composite plate obtained through the profile steel is connected through a wet joint, joint force transmission is more reliable, the tensile capacity is high, rigidity is high, various stress working conditions such as pulling,pressing, bending, shearing and twisting can be borne, and the joint can meet the full-section pulling condition.

An enhanced type shrinkage-compensating ultrahigh-performance concrete hollow plate hinge joint structure comprises web annular anchor bars, plate top annular anchor bars, joint top steel bar meshes,key tooth anchor bars and longitudinal steel bars which are distributed at the upper end and the lower end of the outer side face of webs of two adjacent concrete hollow plates and further comprises shrinkage-compensating ultrahigh-performance concrete poured into a hinge joint of the adjacent concrete hollow plates. The joint top steel bar meshes and the plate top annular anchor bars are arrangedon the tops of the concrete hollow plates, the plate top annular anchor bars are located on the two sides of the hinge joint and connected with the joint top steel bar meshes; key teeth are arrangedon the outer side faces of the webs of the concrete hollow plates, and the key tooth anchor bars are embedded in the positions, located in the protruding positions of the key teeth, of the concrete hollow plates; and the adjacent web annular anchor bars are connected in a lapping mode, and the longitudinal steel bars are arranged in the overlapped positions formed by lapping connection of the adjacent web annular anchor bars. The hinge joint structure is high in connecting strength, good in stress performance, high in durability, easy and convenient to construct and good in economic benefit.

The invention discloses a joint connecting structure of a profile steel-UHPC composite board. The profile steel-UHPC combined board comprises a plurality of profile steels and UHPC plates fixedly connected to the profile steels. The joint connecting structure comprises profile steel-UHPC combined plates which are adjacently arranged in the longitudinal direction of a bridge and transverse joint structures arranged between the profile steel-UHPC combined plates which are adjacently arranged in the longitudinal direction of the bridge. The transverse joint structures comprise transverse cast-in-place UHPC connecting parts located between the adjacent UHPC plates and fixing connecting pieces used for connecting the adjacent profile steel. The joint connecting structure can greatly reduce theself-weight and the manufacturing cost of a bridge deck slab, and has the advantages of being high in rigidity, durable and the like. The profile steel-UHPC composite board and common pavement are expected to become a special pavement scheme for completely replacing a traditional orthotropic steel bridge deck and steel bridge deck in the future and serve as a second bridge deck scheme to be provided for a large-span bridge.

The invention discloses a high-power permanent magnet direct-drive freight locomotive traction converter, and relates to the field of locomotive traction converters. The converter comprises two groups of independent traction main loops, wherein each group of traction main loops comprises a pre-charging loop, a four-quadrant power module, a four-quadrant chopping power module, an independent intermediate direct-current circuit, a traction inversion power module and a three-pole isolation contactor; the electrical principles and structures of the two traction main loops are completely the same. Each intermediate direct-current circuit comprises an energy storage circuit and a measurement and protection circuit; each energy storage circuit is used for stabilizing the voltage of an intermediate loop, each measurement and protection circuit is composed of a grounding measurement circuit, an intermediate voltage sensor and a voltage detection board, and a three-pole isolation contactor is arranged between the traction inversion power module and a permanent magnet synchronous motor. And each three-pole isolation contactor is connected with a three-phase traction inverter INV2 and a permanent magnet synchronous motor through copper bars. The problem that a traction converter of a high-power freight electric locomotive cannot be directly applied to a permanent magnet direct-drive electric transmission system is solved.

The invention discloses a prefabricated superposed reinforced concrete arch culvert, which comprises a cast-in-place reinforced concrete foundation 1, prefabricated inverted-T shaped wallboards 2, a prefabricated cover plate 3 with bracket legs, a prefabricated arch plate 4, an inner post-cast reinforced concrete bottom plate 5, outer post-cast reinforced concrete side bars 6 and post-cast reinforced concrete triangular bars 7. The prefabricated cover plate 3 with bracket legs is provided with lower bracket legs 8 and upper bracket legs 9. A whole arch ring is non-sensitive to subgrade and foundation settlement difference and resistant to cracking, the lateral sides of the arch ring are vertical in fabrication, the cover plate is horizontal in fabrication, and the wallboards are horizontal in fabrication. The prefabricated superposed reinforced concrete arch culvert is safe and convenient in construction, fast in speed, high in quality, high in durability, wide in application and satisfactorily functional.

The invention discloses a high-strength reinforced concrete segment for tunnel support and a production method thereof. In raw materials for production of C45, C50,C55 conventional high-strength concrete segments, 35-40 kg of inorganic nanomaterials and 6-8 kg of polypropylene crude fibers are added into each cubic meter of concrete; through the improving effect of the inorganic nanomaterials on grain grading and an interface microstructure, the bonding condition of the polypropylene crude fibers and a concrete interface is improved and the bond stress of the polypropylene crude fibers and theconcrete interface is increased while the compactness of the concrete is improved, and thus the performance such as tensile resistance, compressive resistance, bending resistance and seepage resistance of the produced novel reinforced concrete segment is improved significantly. According to the high-strength reinforced concrete segment for tunnel support and the production method thereof, the problem that the performance of the conventional high-strength reinforced concrete segments is limited by the production raw materials and difficult to improve is solved, meanwhile, the problems that theappearance and quality defects, affecting the performance of the segment, of surface honeycombs, pitted surfaces, microcracks, corner damage and the like are likely to occur in the production processof the conventional high-strength reinforced concrete segments are also solved, and the whole life cost of a diversion tunnel is effectively reduced while the long-term stability of the tunnel undercomplex geological conditions is ensured.

The invention discloses a formula of Ni-P-nanometer TiO2 composite plating liquid for copper alloy surfaces and a plating process. The formula comprises 26-34 g/L of nickel sulfate, 22-38 g/L of sodium hypophosphite, 8-16 g/L of anhydrous sodium acetate, 10-20 g/L of citric acid, 20-30 mL/L of lactic acid, 4-8 g/L of nanometer TiO2 after ball milling dispersion, and 40-60 mg/L of surface active agent lauryl sodium sulfate. The plating process of composite plating layers comprises the following steps: copper alloys are polished for ultrasonic alkali washing, acid washing and weak acid activation, and then, are positioned in composite plating solution to control the H value and the temperature for plating; and nanometer TiO2 and Ni-P are co-deposited on the surfaces of copper alloy basal bodies to form amorphous composite plating layers. The plating layers have the advantages of smooth surfaces, uniform distribution of TiO2, high hardness, good wear resistance and high bonding strength with the basal bodies.

The invention discloses an application of modular shipbuilding in the construction of a semi-submersible platform. The semi-submersible platform is divided into a living area module, a deck package module, a column and a buoy module; the specific process is as follows: first, the column and the buoy The box module is positioned on the pier, and then the deck bag module is hoisted. After the deck bag module is assembled and welded to 80%, the living area module is hoisted and finally completed. The semi-submersible platform in the present invention is a high-tech and high-value-added product, and its construction technology almost covers the cutting-edge technology of the shipbuilding industry. It takes a lot of energy to ensure the quality and safety of platform construction in terms of technology. The purpose of modular shipbuilding is mainly to reduce the cost of the entire life cycle and maintain the advanced nature of the platform system, to speed up the construction cycle, to upgrade flexibly, and to facilitate the installation of new systems. The modular construction in this patent can meet the characteristics of large platform size, difficult construction and tight construction period, so it can also be extended to the construction of conventional ships and FPSO oil storage ships.