119results about How to "Overcome the shortcomings" patented technology

A 12kv resistance divider includes wire terminal, signal terminal, earthing terminal, ceramic wafer, resistance wire, and a green color protection layer covered by a black protection layer then rubber.

The invention discloses a multifunctional gypsum painting ready mixed mortar as well as a preparation method and application thereof. The multifunctional gypsum painting ready mixed mortar comprises the following components: beta-semi-hydrated gypsum, heavy calcium carbonate, calcium hydroxide, quartz sand, methyl cellulose ether, adhesive, a phase-change material, modified starch, a dispersant, a gypsum shrinking resistant agent, lightweight calcium carbonate, barite powder, talcum powder, tourmaline powder and kieselguhr. The materials, such as kieselguhr, tourmaline, the barite powder, thephase-change material, and the like, are reaonsbaly used in the multifunctional gypsum painting ready mixed mortar; and it is proved that the multifunctional gypsum painting ready mixed mortar has various functions of automatic adjustment of indoor temperature and humidity, radiation resistance, bacterium resistance, air purification, and the like. In addition, the gypsum painting ready mixed mortar has higher anion generating amount and far infrared emissivity, can rapidly exhaust odor generated by products, such as paint, colloid, and the like and can exhaust smoke for a long term.

The invention relates to a hydroxyl-containing water-based acrylic ester polymer and a preparation method thereof. The hydroxyl-containing water-based acrylic ester polymer is synthesized by two steps of: firstly, preparing a specific hydroxyl-containing acrylic ester aqueous dispersion; and secondly, carrying out free base polymerization on the specific hydroxyl-containing acrylic ester aqueous dispersion and 10-30 parts of hydroxyl-containing acrylic ester monomers, 30-50 parts of methacrylate monomers, 0.1-0.5 part of ammonium persulfate and/or potassium persulfate initiator and 30-50 parts of deionized water, wherein the percentage of Mn is mote than or equal to 10,000; the hydroxyl-containing water-based acrylic ester polymer has low content of solvent, high content of solid, low viscosity and low acid value; and the weight ratio of the specific hydroxyl-containing acrylic ester aqueous dispersion to the monomers and the initiator used for the free base polymerization with the specific hydroxyl-containing acrylic ester aqueous dispersion is 1:(1.40-2.0) counted according to the solid content. The hydroxyl-containing water-based acrylic ester polymer can be used for preparing a dual-component waterborne polymerization coating, or can be used for preparing a waterborne amino baking coating and has the advantages of high luster of a paint film, weather resistance, corrosion resistance, low VOC (Volatile Organic Compounds) and wide application range; and a preparation process is stable and controllable.

The invention relates to a low-temperature SCR (selective catalytic reduction) smoke gas efficient denitration catalyst and a preparation method thereof, and belongs to the technical field of catalyst manufacturing. The catalyst uses titanium dioxide as carriers, and contains tungsten oxide, vanadium oxide and antimony oxides or contains rare earth metal cerium oxide; the catalyst without rare earth metal cerium oxide has a little lower denitration efficiency than the catalyst containing rare earth metal cerium oxide. The denitration efficiency of the catalyst reaches 85 percent or more at the low temperature of 130 degrees; the value is much higher than the current condition of the denitration efficiency of being less than 50 percent in the prior art. The low-temperature activity of the catalyst is good; a good oxynitride removal rate and water-resistant and sulphur-resistant performance can be realized within the temperature range of 130 to 250 DEG C; the catalyst has high activity and toxicity resistance at 130 to 250 DEG C, so that the catalyst can be installed behind a coal-fired boiler dust remover; the defects of the existing smoke gas denitration technology are overcome; the catalyst can also be applied to the smoke gas denitration of industrial kilns and the like.

The invention discloses a brazed diamond flexible abrasive disc and a manufacturing method thereof, and relates to a diamond abrasive disc. The invention provides the brazed diamond flexible abrasive disc which is mainly used for coarse grinding processing of hard and brittle materials such as stone, glass, ceramic, concrete and the like, has good sharpness during grinding, is easy to grind special-shaped faces such as planes, edges, angles, arcs and the like, has good high temperature resistance and long service life and does not produce discoloration after long-time dry grinding, and the manufacturing method thereof. The flexible abrasive disc is provided with a diamond grinding layer and a connector; and the diamond grinding layer is provided with a matrix and diamond granules, the matrix is a flexible thin steel sheet, the diamond granules are brazed on the upper surface of the matrix, and the connector is connected with the lower surface of the matrix. The method comprises the steps of manufacturing the diamond grinding layer and manufacturing a finished product of the diamond flexible abrasive disc.

Belonging to the technical field of corrosion protection of steel materials, the invention relates to an electrolysis plating assistant agent applicable to a steel hot-dip galvanizing aluminum alloy coating and a technological method thereof. Specifically, the electrolysis plating assistant agent comprises: 150-650g/L zinc chloride, 20-160g/L ammonium chloride, 5-50g/L stannous chloride, 0-30g/L sodium fluoroaluminate, 0-30g/L sodium fluoride, 0-20g of cerium chloride, and the balance water. According to the invention, the plating assistant agent suitable for hot-dip galvanizing aluminum alloy is perferably selected by orthogonal test, and by adopting electrolysis activation assistant plating, a uniform composite salt film with moderate thickness can be formed on a sample surface by current deposition, thus overcoming the defect of salt film insufficiency generated by depending on the natural settling process of a plating assistant agent salt solution during traditional solvent assistant plating. The obtained coating has a smooth and bright surface, and good corrosion resistance.

The invention provides a method for preparing a solid enzyme reagent which is used to fast measure the organophosphorus and carbamate toxicity of pesticide residue and its using method. The agent is formed by choline esterase, buffer solution and carrier. The solid enzyme reagent can be stored at indoor temperature above 20 days.

The invention discloses a Chinese preparation for treating burn without leaving scars, which is prepared from the following components in part by weight: giant knotweed 190, garden burnet root 160, rhubarb 135, propolis 145, Hemiboea subcapitata C. B. Clarke 85, cactus 90, Jatropha curcas skin 30, twotooth achyranthes root 85, radix pseudo-ginseng 60, Azolla imbricata 55, beautyberry 35, dragon's blood 30, amur corktree bark 30, pagodatree pod 28, cicada shell 15, musk 0.7, borneol 7.5 and 95 percent alcohol for pharmaceutical purposes 4,500. The preparation has the characteristics of stopping blood, constricting, relieving pains and itching, achieving antibacterial effect, quickly healing wounds and avoiding leaving scars and the like. The preparation can treat burn simply and quickly, does not require strict sterilization operation and can be applied after the wound surface is cleaned simply. The preparation can make epithelial tissue and collagen issue of the wound surface grow in proportion, repair the wound surface more completely and obviously reduce pigmentation and scar generation.

The embodiment of the invention discloses a frequency diverse array-multiple-input multiple-output (FDA-MIMO) dimensionality-reduction space-time adaptive clutter suppression method and device based on an auxiliary channel. The FDA-MIMO dimensionality-reduction space-time adaptive clutter suppression method can comprises the steps that original data of an FDA-MIMO radar are subjected to primary distance dependence compensation according to Doppler center estimate values of all distance units, and thus primary compensation data are obtained; the primary compensation data are subjected to secondary distance dependence compensation according to the step quantity of the transmitted signal carrier frequency of the FDA-MIMO radar relative to the reference carrier frequency, and thus secondary compensation data are obtained; the secondary compensation data are converted to a Doppler-transmitting-receiving space frequency domain along a clutter ridge, and thus converted data of the Doppler-transmitting-receiving space frequency domain are obtained; an adaptive clutter suppression weight vector is obtained according to the converted data and the minimum variance constraint theory; and the converted data are subjected to clutter suppression according to the adaptive clutter suppression weight vector, and thus output data after clutter suppression are obtained.

The invention discloses a systematic test method for the regional stability control joint debugging. The systematic test method comprises the following steps: a regional stability control test systemcomprises a host automatic test platform, a test terminal and a stability control device; through the cloud communication platform based on 5G signals, the host automatic test platform is in communication connection with the test terminal, and bidirectional transmission of information between the host automatic test platform and the test terminal is realized. Realizing information interaction between the test terminal and the stability control device based on a standardized communication protocol; the host automatic test platform is used for issuing test cases and receiving action informationof the stability control device; and judging the correctness of the test result according to the received feedback information and generating a test report, thereby realizing the full-automatic closed-loop test of the host automatic test platform, the test terminal and the stability control device in the whole process. According to the method, comprehensive, standardized and intelligent detectionof the stability control system can be realized, and the detection efficiency of equipment of different manufacturers can be improved.

The invention provides a preparation method of a sleeper, which solves a problem that a composite material sleeper is not available in the prior art. A preparation method of a phenol-formaldehyde resin based composite material sleeper comprises processes of prereg preparation, surface material preparation and composite material preparation in sequence. According to the invention, as a large quantity of wood residues are utilized, low cost and good use performance are achieved, defects of a cement sleeper are overcome, saving and substitution of woods are developed, the wood consumption structure is optimized, the situation of domestic wood resource shortage is relieved to a certain degree, and sustainable utilization of forest resources and the ecological environment are improved.

A Chinese medicine in the form of ointment of spray for treating burn, scald and sore is prepared from 9 Chinese-medicinal materials including gypsum, calamine, cuttlefish bone, pearl, etc through respectively calcining and parching, pulverizing, proportional mixing, adding vaseline, and stirring. Its advantage is high curative effect.

The invention relates to a production method of low-ethylether insoluble food grade soybean concentrated phospholipid. The food grade soybean concentrated phospholipid prepared by the method contains no more than 0.05% of ethylether insoluble. The production method of the invention comprises the following key steps: dissolving feed grade concentrated soybean phospholipid with solvent to reduce the viscosity, removing ethylether insoluble impurity through centrifugal settling, then adding food grade hydrogen peroxide to decolor phospholipid under the condition of maintaining the solvent, and finally adopting two-stage evaporation to separate and recycle the solvent and obtain the finished product. The method of the invention solves the problems in the original production of the food grade soybean concentrated phospholipid, overcomes the defect that partial fine particles can not be removed in the filtration method for purification and obtains the low-ethylether insoluble food grade soybean concentrated phospholipid.

The invention discloses a hydraulic driving device for a large reel type sprinkler. The driving mechanism comprises a hydraulic motor and a hydraulic system, wherein the hydraulic motor is arranged ona reel support frame; an output shaft of the hydraulic motor is connected to a reel shaft through a coupling; the hydraulic system comprises a hydraulic pump, a hydraulic valve block and a hydraulicpump driving device; the hydraulic valve block is fixed to a vehicle body; a three-position four-way directional control valve, a proportional throttle valve, a one-way valve and a two-position two-way directional control valve are arranged on the hydraulic valve block; the hydraulic pump enables hydraulic oil in an oil tank to sequentially pass oil inlets of the proportional throttle valve and the three-position four-way directional control valve and enter the hydraulic motor; return oil of the hydraulic motor sequentially passes an oil return hole of the three-position four-way directional control valve and the one-way valve and returns to the oil tank; the two-position two-way directional control valve is connected in parallel to an oil line between an oil outlet of the proportional throttle valve and the oil inlet of the three-position four-way directional control valve; and an oil outlet of the two-position two-way directional control valve communicates with the oil tank. The hydraulic driving device can supply relatively large reel driving force, can also accurately detect the recovery speed of PE pipes and meanwhile is simple in structure and low in failure rate.

The invention belongs to the chemical field, and particularly relates to a method for catalytically reducing nitro compound by using carbon monoxide and water as hydrogen sources and supported gold as catalyst. In the method of the invention, the nitro compound is used as substrate in the presence of carbon monoxide and water, the supported gold is used as catalyst, proper cosolvent is added into water phase or water phase system and the corresponding amine is prepared under the temperature of 30 to 50 DEG C. And the nitro compound can be either aliphatic nitro compound or aromatic compound, wherein a substituent group can be formed on the aromatic nitro compound and also can not be formed on, and the substituent groups can be one kind or several kinds of electron-donating base groups and/or electro-attracting base groups. The method has the advantages of easy operation, easily available raw materials, less pollution and high yield, and the catalysts can be easily separated, recovered and recycled.

The invention discloses a high-voltage isolated SCR and IGBT driver based on a wireless power supply technology. The driver comprises a primary power supply circuit (1) and a secondary power reception circuit (2), both the primary power supply circuit and the secondary power reception circuit are sealed, the primary power supply circuit is isolated from the secondary power reception circuit, and power is supplied to the driver in the wireless energy transmission manner between the primary power supply circuit and the secondary power reception circuit. The primary side is neither electrically nor physically connected with the secondary side, problems in insulation materials and assembling technology are avoided, contacts of the insulation material are prevented from being exposed, and the safety, sealing, flexibility, beauty and the like of the driver are higher, high-voltage isolated power supply is realized, and the inherent defects of the contact type energy transmission of a traditional driver are overcome.

The invention relates to the gas-controlled ground well valve, which comprises the interface valve, the main valve and the gas-controlling valve. The interface valve connects the interface base, the guide piston pole inserts in the guide piston spring base, and the guide piston spring is sleeved outside of the piston pole and the spring base; the main piston of the main valve is on the bottom of the main valve base, and the main piston sleeve is outside of the main piston, the main piston springs is between the spring bases, and the side walls of the main piston sleeve have the oil apertures; the gas-control valve piston is at the upper part of the cylinder, the top of the connecting rod connects the bottom of the piston, and the bottom of the connecting rod joints the spring locating sleeve with the oil apertures; the inner wall of the cylinder has the baffle with its central aperture connecting the middle of the connecting rod; the spring locating slot is at the bottom of the cylinder; the oil inlet aperture at the bottom of the cylinder connects the oil transferring pipe; the spring is between the locating sleeve and the locating slot; the oil aperture on the cylinder wall communicates with the main valve chamber; the oil aperture is below the baffle of the cylinder; the air-through hole connects the inlet hole through the air pipe and the interface valve base.

The invention discloses a novel technology for preparing a hydroxypropyl methyl cellulose derivative. The novel technology comprises the steps that hydroxypropyl methyl cellulose, a solvent, a catalyst and an esterifying agent are added into a reaction container, stirring and heating are carried out for an esterification reaction, the temperature is decreased to indoor temperature after the reaction is finished, a precipitating agent is added, and precipitate is filtered and washed to obtain the hydroxypropyl methyl cellulose derivative. The preparation technology is simple and efficient, and has the advantages that the reaction condition is moderate, product aftertreatment is simple, the product yield is high, and acid residue amount is small.

The invention relates to the technical field of electrified railway power supply, in particular relates to a grooved wheel compensation device 100 used by the anchor compensation of electrified railway contact line guide wire (carrier cable and contact wire). The compensation device comprises a connecting hole 1, a connecting frame 2, a nameplate 3, a locking wire hole 4, a steel wire rope 5, a double ear wedge-shape clamp 6, a spindle 7, a locking pin 8, a steel wire rope 9, a balance wheel 10, a wheel body 200 and a braking device 300. The steel wire rope 5 is connected with a weighing mound through the double ear wedge-shape clamp 6, the steel wire rope 9 and the balance wheel 10 through an insulator are connected with the contact line guide wire (carrier cable and contact wire). The high speed electrified railway contact line guide wire (carrier cable and contact wire) can instantly brake when disconnection accidents occur, the braking effect is good and the braking distance is short, meanwhile, the device is provided with the tension lock and 60kN above carrying capacity.