41results about How to "Has an economic advantage" patented technology

The radial bearing (1) consists of outer (3) and inner (4) metal rings with races (5) for rolling bodies (2) such as balls or rollers in a metal cage (6) with a hardness similar to that of the rings. - The radial bearing (1) consists of outer (3) and inner (4) metal rings with races (5) for rolling bodies (2) such as balls or rollers in a metal cage (6) with a hardness similar to that of the rings. It also has at least one circular contact ring (7a, 7b, 7c, 7d) made from a material with a different hardness to the bearing rings and cage, set in one or more grooves (8) in the bearing rings and preventing any direct contact vbetween the cage and bearing ring(s) with the groove(s). The contact rings can be made from a non-ferrous metal such as a copper alloy or bronze, or from a polymer material.

The invention relates to a method for producing a plastic frame for a two-wheeled vehicle by means of plastic injection molding, said plastic frame having at least one cavity in the interior, said method comprising a series of steps, wherein, after a preferably thermoplastic plastic melt has been injected into a closed injection-molding tool, a fluid is injected in order to displace the plastic core out of the component cavity.

The invention provides an excavation support structure and a construction method of a tunnel. The excavation support structure of a tunnel includes an outer layer support and an inner layer support, and the outer layer support includes an adjustable outer layer bottom plate and an adjustable The adjusted outer layer arch support, the inner layer support includes the inner layer bottom plate and the inner layer arch support, and a sandwich space is formed between the outer layer support and the inner layer support; a construction method is also provided, which includes: installing For the outer floor, install the outer arch support to form a temporary concrete support layer, install the inner support to form a permanent concrete reinforcement layer, etc. The invention is relatively simple to install, is conducive to the rapid development of engineering construction, has strong adaptability, has economic advantages, and can better control the problem of deformation of the supporting structure.

A method for determining the power-frequency design field intensity of a high-voltage crosslinked polyethylene cable comprises the step of manufacturing insulation test blocks of the crosslinked polyethylene cable, the step of manufacturing and preprocessing pin electrodes, the step of manufacturing test specimens for an electrical tree test, the step of conducting an electrical tree initiation test and data processing under a power frequency voltage, the step of conducting an electrical tree initiation test and data processing under the 400 Hz alternating voltage, the step of determining the critical voltage of electrical tree initiation through an impressed voltage and electrical tree initiation time, the step of calculating the critical field intensity of electrical tree initiation according to the size of an electrode system, and the step of determining the power-frequency design field intensity of the crosslinked polyethylene cable through an electric field enhancement coefficient. According to the method, the number of the needed test specimens is small, operation is simple, and control is easy. The determined power-frequency design field intensity can truly and effectively reflect power frequency voltage resistance of the high-voltage crosslinked polyethylene cable with the long service life. The method can be directly used for insulation thickness design of the cable, and guarantees that high-voltage power cables which can meet the technical requirement for long-time and reliable operation and have economic advantages are designed during new product development.

The invention discloses a water tank heat storage temperature increasing device. The water tank heat storage temperature increasing device comprises a heat source, a heat storage water tank and a heatuser. The heat source communicate with the heat storage water tank through a heat storage pipeline. The heat source communicates with the heat user through a heat supply pipeline. The heat storage water tank communicates with the heat user through a heat storage heat supply pipeline. The upper end of the heat storage water tank is provided with a connecting pipeline. An open container is arrangedon the connecting pipeline. The open container communicates with the heat storage water tank through the connecting pipeline. The saturated pressure intensity and saturated temperature of water in the heat storage water tank are increased through the open container. According to the water tank heat storage temperature increasing device, the height of the liquid level of the water in the heat storage water tank is increased through the open container and the connecting pipeline, so that the pressure intensity of the water in the heat storage water tank is improved, and then the temperature ofthe water in the heat storage water tank is increased. On the one hand, the heat storage capacity of the heat storage water tank is improved in the heat storage process; and on the other hand, the water yielding temperature of the heat storage water tank can be increased in the heat supply process. Accordingly, the supply water temperature of a whole heating supply system is high.

The invention discloses a porous ceramsite Fenton catalyst and a preparation method thereof. The method includes steps: (1) taking, by weight, 20-60 parts of civil sludge, 10-20 parts of clay, 10-20 parts of kaolin, 10-20 parts of coal ash, 2-5 parts of a silicon source, 2-5 parts of a copper compound and 2-5 parts of an iron compound as raw materials, well mixing the raw materials, and extruding to obtain a ceramsite blank material, wherein the silicon source is selected from one or more of sodium silicate, fumed silica and silicon powder; (2) subjecting the ceramsite blank material to drying, sintering and cooling to obtain a porous ceramsite carrier, wherein sintering particularly includes: heating the ceramsite blank material to 300-600 DEG C, keeping the temperature for 10-40min, reheating to 950-1150 DEG C, and keeping the temperature for 10-40min. By adoption of sludge for preparation of the porous ceramsite Fenton catalyst, simplicity of the raw materials, low cost, sludge reclamation and economic superiority are realized. In addition, the porous ceramsite Fenton catalyst with the rough surface and a great quantity of penetrating pores is high in particle porosity and specific surface area, stable in chemical property and adaptable to wastewater treatment in acid environments.

The invention discloses a steviophenol zirconium catalyst for catalyzing the hydrogenation of furfural to prepare furfuryl alcohol and a preparation method thereof, belonging to the technical field of heterogeneous catalysis. The invention utilizes stevia rebaudiana polyphenols and a zirconium source to prepare a steviol phenol zirconium catalyst through a specific ratio and a solvothermal method. The zirconium steviol phenolate catalyst obtained in the present invention can have a good catalytic effect of furfural hydrogenation under relatively mild conditions and a low dosage. The catalyst is heterogeneous in the reaction system, easy to separate and reuse, and maintains excellent performance after repeated use. Catalytic performance, has very good application prospects.

The present invention provides a nano particle of a nucleic acid. The nano particle of a nucleic acid is composed of a plurality of single chain nucleic acid units, the single chain nucleic acid units comprising three-head single chain nucleic acid units and optionally also comprising two-head single chain nucleic acid units and one-head single chain nucleic acid units. The nano particle of a nucleic acid has high nucleic acid loading and relatively high stability. In addition, the present invention also provides a process for preparing the nano particles of a nucleic acid and the use thereof in the preparation of small interfering nucleic acid drugs.

The invention relates to a method for optimizing the redundancy of a large-scale offshore wind farm power collection system, comprising the following steps: 1) designing a redundant structure of the offshore wind farm power collection system according to the wind turbine coordinates, submarine cables and electrical equipment data of the offshore wind farm; 2) According to the design results of the redundant structure of the offshore wind farm collector system, define the redundancy degree of the collector system to indicate the redundancy degree of the redundant structure of the collector system, and calculate the various costs of the collector system under different redundancy degrees; 3) According to the various costs, calculate the full life cycle cost of the offshore wind farm power collection system under different redundancies, and the design with the lowest life cycle cost is the optimal design of the power collection system redundancy. Compared with the prior art, the invention has the advantages of high reliability, good economy, consideration of different redundancy and the like.