33results about How to "Clear parameters" patented technology

The invention discloses a bisphenol A epoxy resin preparation method and a product prepared therethrough. The method comprises the following steps: carrying out a pre-reaction and a ring closing reaction on raw materials comprising bisphenol A and chloropropylene oxide to prepare a crude bisphenol A epoxy resin, removing water and excess chloropropylene oxide, refining, desalinating, neutralizing through water washing, removing a solvent, and concentrating to obtain a bisphenol A epoxy resin. The preparation method has the advantages of stable process, clear parameters, detailed steps and strong feasibility; and the bisphenol A epoxy resin prepared through the preparation method has high purity, has an organic chloride content of below 0.02wt%, and has high epoxy value, high softening point and extremely good quality, so the performances of the bisphenol A epoxy resin are improved.

The invention relates to a gas injection and brine discharge device for a salt cavern gas storage, comprising: a casing, an inner tube for gas injection and brine discharge, and an outer tube for gas injection and brine discharge; the outer tube for gas injection and brine discharge is lowered into the upper part of the salt cavern through the casing , the outer pipe for gas injection and brine removal is connected to the lower part of the casing through a packer, and the annular space between the casing on the upper part of the packer and the outer pipe for gas injection and brine removal is filled with annulus protection fluid. The method of gas injection and brine removal includes the following steps: sonar measurement of the cavity, lowering the drill pipe to explore the bottom, acquisition of physical parameters of the sediment at the bottom of the cavity, determination of the size and rate of the gas injection and brine removal inner pipe, and the insoluble matter near the mouth of the gas injection and brine removal inner pipe. The force analysis of the sediment particles, the nozzle depth of the nozzle of the inner gas injection and halogen removal pipe and the outer nozzle of the gas injection and halogen removal pipe are determined, and the outer and inner pipes of the gas injection and halogen removal are lowered, and the gas injection and halogen removal are carried out. Compared with the prior art, the present invention is applicable to brine discharge in salt cavern gas storage, salt cavern hydrogen storage, salt cavern compressed air energy storage and salt cavern oil storage; the steps are simple, the parameters are clear, and the operability is strong, which can realize the Accurate control of gas injection and brine discharge for salt cavern gas storage.

The invention discloses a method for electric transmission line windage yaw transient analysis under action of moving thunderstorm wind. The method comprises the steps that the vertical wind speed is considered in simulation of a moving thunderstorm wind field and the spatial correlation and the pulsation effect are synchronously considered; when the wind load is determined, a transient wind attack angle and a corresponding divided conductor aerodynamic coefficient are introduced, and the wind speed and change of the direction are considered in a time domain; in the analysis process of a wind deflection angle, displacement, caused by the asymmetric load, in the direction of a line is considered, the largest wind deflection angle of part of the electric transmission line is calculated under the condition of the extreme wind load, design work of windproof measures of the electric transmission line is directed, and the power supply reliability of the electric transmission line is improved.

The invention relates to a method for preparing a microcapsule taking a hydrophobic substance as a core material by a complex coacervation method. The method has the advantages of simple process and relatively lower cost, and the product has relatively higher encapsulation efficiency. The method comprises the following steps of: (1) weighing gelatin and carboxymethylcellulose in certain proportion, and stirring and dissolving the gelatin and the carboxymethylcellulose in hot water; (2) adding hydrophobic substance in certain mass ratio and dispersing the hydrophobic substance for 2 minutes ata high speed to form emulsion; (3) stirring the emulsion at the constant temperature of 45 DEG C, adjusting the pH of the emulsion to be 4.4 to 4.8 with a 10 percent ethylic acid and reacting the emulsion with the ethylic acid for 5 minutes; (4) cooling the emulsion until the temperature is below 15 DEG , adjusting the pH of the emulsion to be 6.0 and adding glutamine transaminase for solidification; and (5) filtering the mixed solution to obtain a wet microcapsule product, and freeze-drying or spray-drying the wet microcapsule product to obtain a dried microcapsule product.

The invention discloses a water-washable superfine tin powder water-soluble lead-free high-temperature soldering paste and a preparation method thereof, comprising the following raw materials in parts by weight: 30-55 parts of antioxidant, 10-26 parts of organic solvent, and 4-4 thixotropic agent 8 parts, 8-16 parts of active agent, 6-10 parts of corrosion inhibitor and 6-10 parts of surfactant. The water-washed solder paste prepared by using the solder flux paste of the invention has good stability and effectively meets practical requirements such as oxidation resistance, fullness of tin dots, low voids, no residue splashing, and good cleaning performance.

The invention provides a cultivation method for promoting stable yield of dried sweet potatoes in northern sweet potato area plains to exceed one ton per mu. The cultivation method comprises the steps of carefully selecting the variety, selecting land to form a ridge, performing formulated fertilization, selecting strong seedlings, performing film mulching and early planting, appropriately increasing the density, performing drip irrigation under a mulch, strictly preventing diseases and pests, chemically controlling the excessive vegetative growth and performing mechanical harvesting. According to the cultivation method, through early planting and close planting and by the matching of other advanced planting technologies, the growth time of the sweet potatoes is prolonged, the content of starch in the sweet potatoes and the sweet potato dry matter accumulation amount in unit area land are remarkably improved, and the per mu yield of the dried sweet potatoes can exceed one ton. The comprehensive degree of the technology is improved, the fusion of the improved variety and the good method and the combination of an agricultural machine and the agricultural technology are performed, the matching of engineering measures and cultivation measures is achieved, the level of the cultivation technology is fully improved, the working efficiency is improved, and the production cost is reduced. The standard degree of the technology is improved, the technology details and parameters are further clearer through the quantitative data indexes, and the basis is laid for the standard forming and popularization of the planting technology.

The invention relates to a prestress design method for a concrete cable tower anchorage area of ​​a cable-stayed bridge, belonging to the field of prestress design for the cable tower anchorage area. The present invention comprises the following steps: Step 1: Determine the thickness-to-width ratio λ of the front wall of the cable tower; Step 2: Select the cable tower pull-strut model to be adopted according to the λ value, and calculate the geometric parameters; Step 3: Solve the maximum tie rod Internal force; Step 4: Calculate the required number of prestressed tendons according to the maximum internal force of the tie rods; Step 5: Arrange the prestressed tendons according to the direction of the tie rods in the model. The invention can be used for the quantitative design of the prestress in the anchorage area of ​​the cable tower, and proposes a tension-compression bar model in the anchorage area of ​​the cable tower with clear geometric parameters that can be directly used by engineers. The invention has strong versatility, high design efficiency, clear mechanics concept and high calculation accuracy, and avoids the blindness and low efficiency of relying on the experience of designers and a large number of trial calculations in the design of traditional cable tower anchorage areas.