51results about How to "Fulfill the standard" patented technology

The invention provides a method for purifying iodixanol. The invention adopts a recrystallization method to purify crude iodixanol prepared from dipolymer of 5-acetamido-N,N'-bis(2,3-dihydroxypropyl)-2,4,6-triiodo isophthalamide, after several times of repeated purification, an iodixanol product qualified to Pharmacopoeia standards is obtained. The inventive purification method can be effectively used for purification of crude iodixanol prepared from dipolymer of 5-acetamido-N,N'-bis(2,3-dihydroxypropyl)-2,4,6-triiodo isophthalamide, and the used solvent has low cost, so as to remarkably reduce cost compared with the prior purification method. In addition, the inventive purification method is a non-chromatographic solvent purification method and can obtain iodixanol with high purity and high content after several times of repeated purification, so as to meet the industrial production requirements of iodixanol product, as well as Pharmacopoeia standards.

The invention discloses square billet low-medium carbon steel continuous casting crystallizer mold powder and a production method thereof. The mold powder is composed of 29-32Wt% of CaO, 28-31Wt% of SiO2, 1.6-2.2Wt% of MgO, 1.6-2.5Wt% of Fe2O3, 6.5-8.5Wt% of Al2O3, 4.5-6.5Wt% of Na2O, 4.5-6.5Wt% of F and 11.5-13.5Wt% of solid C. The production method includes raw material pretreatment and detection, mold powder formula designing, burdening and pulping, spray granulation, screening dedusting and product detection. The production method is low in production cost, quality of the mold powder and utilization efficiency of yellow phosphorus slag can be improved, and contribution to environment is great; tests show that compared with using of conventional raw materials, due to adopting the yellow phosphorus slag as a raw material, cost can be lowered by 256-309 RMB/ton, and primary qualified rate of casting blanks is increased by 2.4-2.9% after being used for production.

The invention discloses a method for purifying water of a micro polluted water source, which comprises a Fenton reaction process (4), a coagulative precipitation process (5) and an oxidant oxidation and disinfection process (8). The Fenton reaction process (4) means to add oxidant, metal salt and catalyst into the water of the micro polluted water source to be treated with metering respectively so that the oxidant decomposes the organic substances in the sewage and the organic substances are removed from the sewage; the coagulative precipitation process (5) means to add a coagulant into the sewage after the oxidation treatment to precipitate small granular suspension substance, colloidal substance and metal salt in the wastewater; and the oxidant oxidation and disinfection process (8) means to perform further oxidant treatment on the clean water obtained in the previous process to remove residual hydrogen peroxide from the water and disinfect the clean water, wherein the disinfected clean water can be used as drinking water. The invention also provides a treatment device for purifying the water of the micro polluted water source.

The invention relates to a heat storage heat insulation knitted fabric, which is knitted on a weft knitting machine. The weft knitting machine comprises a needle disc knitting needle and a needle cylinder knitting needle, wherein the needle disc knitting needle comprises a first high needle and a first low needle; and the needle cylinder knitting needle comprises a second high needle and a second low needle. The fabric is prepared by the following steps of: for a first path, feeding polyester fiber yarns, forming a loop with the first high needle, forming a floating line with the first low needle, forming a floating line with the second low needle, and forming a loop with the second high needle; for a second path, feeding spandex yarns and blended yarns simultaneously, forming a floating line with the first high needle and the first low needle, and forming a loop with the second high needle and the second low needle of the needle cylinder knitting needle; for a third path, feeding ultra-fine denier polyester yarns, forming a loop with the first high needle and the first low needle of the needle disc knitting needle, and forming a floating line with the second high needle and the second low needle of the needle cylinder knitting needle; and for a fourth path, a fifth path and a sixth path, repeating the knitting methods of the first path, the second path and the third path, and repeating by taking three paths as a period. The fabric is soft and breathable, is comfortable to wear, and has a strong heat storage heat insulation function.

The invention discloses a novel foldable container and an assembling method thereof. The foldable container comprises a rectangular underframe, hinges, corner columns, top-angle parts and a goods carrying platform, wherein each hinge comprises a fixed portion, a movable portion, a hinge pin and a lock pin, the hinges are fixedly connected to the corners of the underframe, the corner columns are fixedly connected with the movable portions of the hinges, the top-angle parts are arranged on the top of the corner columns, the goods carrying platform is formed by the corner columns and the underframe after the corner columns are folded towards the inside of the container along the hinges, and the distance between the axis of the hinge pin and the top surface of the goods carrying platform is larger than that between the axis of the hinge pin and the end face of the goods carrying platform close to the hinge pin. When the corner columns are vertical completely, the top-angle parts are parallel to the ground completely, and when the corner columns are folded, the end faces of the top-angle parts and the corner columns are not beyond the top surface of short corner columns. According to the novel foldable container and the assembling method, standards about containers are met, assembling difficulty is reduced and assembling quality is improved.

The invention discloses an air sterilizing and purifying system. The system comprises a shell; an air outlet is formed in the top of the shell; a liquid crystal display control screen and a probe detecting hole are arranged on the front surface of the shell; an air returning hole is formed below the probe detecting hole; an ultraviolet sterilizing lamp is arranged at the bottom end of the inner side of the shell; a primary filter, a medium-efficiency filter and a high-efficiency filter are sequentially arranged over the ultraviolet sterilizing lamp; an active carbon filter is arranged between the primary filter and the medium-efficiency filter; a supporting cross bar is arranged between the medium-efficiency filter and the high-efficiency filter; a fan bracket is arranged on the supporting cross bar and used for fixing a fan. The air sterilizing and purifying system disclosed by the invention is simple in structure, convenient to install, capable of disinfecting and sterilizing air, filtering and removing dust, also capable of effectively removing peculiar smells, low in electric energy usage, low in noise and convenient to move.

The invention discloses a method for preventing and treating sugarcane pokkah boeng disease. Concretely, when sugarcane blades are not subjected to diseases or preliminary symptoms of diseases arise, prevention and treatment are performed by utilizing fluxapyroxad liquid and nano carbon liquid in matching with organosilicon, the concentration of the fluxapyroxad liquid is 1.5-2.5 g/L, and the chemical liquid amount per mu is 45-60 kg; the concentration of the nano carbon is 8-15 g/L, and the chemical liquid amount per mu is 45-60 kg; the concentration of the organosilicon is 5-10 g/L and is matched with fluxapyroxad and tricyclazole in use; the chemical application temperature is 20-26 DEG C, and the chemical application humidity is 30-60%. By utilizing the method, the chemical liquid utilization rate can be improved effectively, the effect is obvious, the comprehensive prevention effect can be cover 80%, and the method has very good popularization and application values.

The invention discloses a differential pressure type mine automatic fire extinguisher based on a novel extinguishant. The differential pressure type mine automatic fire extinguisher comprises a high-pressure fire extinguisher, a running piping is connected to the outer surface of one end of the high-pressure fire extinguisher, an expansion valve is arranged on the inner side of the running piping,a communicating vessel is arranged on the other end of the running piping, a plurality of groups of atomization spraying heads are arranged on one side of the communicating vessel, and a fire sourcedetector is arranged on the outer surface of the lower end of the running piping. When a fire happens, gas in an expansion air pressure package in the fire source detector expands, the high-pressure gas is transported to the expansion valve, the expansion valve is pushed to be opened, the high-pressure extinguishant is transported to the atomization spraying heads, refining treatment is conductedon the extinguishant through the atomization spraying heads, the schistose extinguishant is sprayed out and evenly sprayed in a large range towards all around through the action of a cone table, thusthe fire source is quickly put out, when the automatic control system failure occurs or manual operation is needed, a manual trigger button is triggered manually, the expansion valve is controlled tobe opened, and manual fire extinguishing is conducted.

The invention provides a 3003H14 aluminum alloy sheet and a production method thereof. The 3003H14 aluminum alloy sheet comprises the following components in percentage by mass: less than or equal to0.20% of Si, 0.40-0.50% of Fe, less than or equal to 0.15% of Cu, 1.05-1.20% of Mn, less than or equal to 0.05% of Mg, less than or equal to 0.05% of Cr, less than or equal to 0.10% of Zn, 0.01-0.05%of Ti, less than or equal to 0.05% of other single impurity, less than or equal to 0.15% of all impurities in all and the balance being Al. The production method comprises the following steps: carrying out fusion casting, saw cutting, face-milling, ingot casting heating, hot rolling, cold rolling, cleaning, pulling straightening and transverse shear in sequence. The production method has the beneficial effects that the production method can ensure the performances of the product and shorten the production process; the mechanical properties are controlled by hot rolling plus one-pass cold rolling; and the 3003H14 aluminum alloy sheet product with the thickness of 2.0-4.0mm is produced, and the cost is saved.

The invention discloses round-billet continuous-casting crystallizer covering slag and a production method thereof. The covering slag comprises, by weight, 23-27% of CaO, 29-32% of SiO2, 1-3% of MgO, 4.5-6.5% of Al2O3, 4-6% of Na2O, 2.5-4.5% of F, 14-18% of Csolid and less than or equal to 2% of Fe2O. The production method includes raw material pretreatment and testing, covering slag formulation design, compounding and pulping, spray granulation, screening dedusting and product testing. The production method is low in cost, capable of improving quality of the covering slag and increasing utilization rate of yellow phosphorus waste slag and great in contribution to the environment; tests show that compared with a conventional raw material, the yellow phosphorus waste slag taken as a raw material has the advantages that cost of the covering slag is lowered by 223-276 RMB/ton, and first-class qualified rate of cast billets is increased by 2.3-3.1% on year-on-year basis.

The invention discloses a control method of cucumber downy mildew, and belongs to the field of vegetable disease control. According to the method, at the initial stage of the disease, mandipropamid liquid medicine and chitosan liquid medicine are used to perform liquid spraying at intervals, and 2-3 control periods are required, wherein each control period comprises the following steps: (1), using the mandipropamid liquid medicine with a certain concentration to perform uniform spraying; (2), after 8-12 days, using the chitosan liquid medicine with a certain concentration to perform uniform spraying. By using the method provided by the invention, downy mildew harm to cucumbers during cultivation can be effectively reduced, the using amount and times of chemical pesticides are reduced, and the method has good popularization and application value.

The invention belongs to the technical field of laminated glass, and specifically relates to a PVB adhesive film and a preparation method thereof, and laminated safety glass. The PVB adhesive film provided by the invention comprises 75 to 85 parts by weight of PVB resin, 10 to 20 parts by weight of a plasticizer, 0.01 to 1 part by weight of cesium tungsten bronze, 0.1 to 1 part by weight of propylene glycol methyl ether acetate, 0.07 to 0.1 part by weight of potassium acetate, 0.1 to 0.5 part by weight of ethanol and 0.1 to 0.5 part by weight of water. According to the invention, through the synergistic effect of above-mentioned components, the haze of the PVB adhesive film is effectively reduced, so the PVB adhesive film meets the standards of the laminated safety glass and has good safety, light transmission performance and heat-insulation and sound-insulation performances.

The invention relates to a shield tunnel intelligent monitoring system based on a VR simulation technology. The system is characterized by comprising a distributed optical fiber displacement sensor, adistributed optical fiber temperature sensor, a fiber grating displacement sensor, and a VR simulation device. The system comprises a data analysis unit and a VR virtual display unit which are connected with each other. The data analysis unit is connected with the distributed optical fiber displacement sensor. The distributed optical fiber temperature sensor is wirelessly connected with the optical fiber grating displacement sensor. The data analysis unit is used for calculating the structural internal force data of the shield tunnel in real time, and the VR virtual display unit is used for drawing a structural disease effect picture of the shield tunnel according to the structural internal force data obtained by the data analysis unit and displaying the structural disease effect pictureto a user in a VR form. Compared with the prior art, the method has the advantages that monitoring feedback is fast, the display effect is vivid, and application is not limited by the operation range.

The invention provides a process water treatment system of oily sludge treatment equipment, which is applied to the technical field of oily sludge treatment. A dosing device (1) of the process water treatment system of the oily sludge treatment equipment is communicated with an aeration oil separation tank (5) of an oily sewage purification device (2), and the aeration oil separation tank (5) is communicated with a coagulative precipitation tank (6); the coagulative precipitation tank (6) is communicated with the middle tank (7), the coagulative precipitation tank (6) is simultaneously communicated with the fiber ball filter (3), the fiber ball filter (3) is communicated with the middle tank (7), and the middle tank (7) is communicated with the pyrolysis desorption system. According to theprocess water treatment system of oily sludge treatment equipment, theprocess water treatment process in theoily sludge treatment is simplified, the process water treatment in the oily sludge treatment process is efficiently realized with high quality, and the oily sludge treatment system is effectively matched to perform environment-friendly treatment on the oily sludge with pollution property,so that the oily sludge standard is met, and the environment-friendly requirement is met.

The invention relates to a protection board suitable for mounting an over-current protection device PTC. The protection board is a hard board, a soft board and a rigid-flexible board. The protection board comprises a substrate layer and a circuit layer, wherein the circuit layer covers a surface of the substrate layer, the circuit layer comprises bonding pads for welding pins of electronic components, conductive wires forming a circuit, and a protective layer covering the conductive wires, the conductive wire at least comprises one group of bonding pads for welding the PTC, and at least one conductive wire performs local wiring from the middle of bonding pads of welding pins at two ends of the PTC or penetrates through the bonding pads of the pins at two ends of the PTC during wiring, i.e., the at least one conductive wire passes through the bottom of the PTC. The protection board is advantaged in that the conductive wire passes through the bottom of the PTC during wiring, when the current is small, the section of the conductive wire generates little heat, the PTC is hardly influenced by the heat of the section of the conductive wire, and when the current is large, the section of the conductive wire generates dramatically increased heat, the PTC is greatly influenced by the heat of the section of the conductive wire, and the action protection of the PTC is more easily triggered.

The invention relates to a novel mine isolating compressed oxygen self-rescuer with protection time being 45 min. On the premise of not changing the basic structure of an existing self-rescuer of the type, an appropriate amount of lithium hydroxide is added into a cleaning tank in the self-rescuer, a solid oxygen source called oxygen candle for short is arranged on the cleaning tank, and in this way, the production and manufacturing technology of the self-rescuer reaches the international advanced level. The novel self-rescuer can meet regulations and requirements of related standards and rules in china and actual requirements of the market and coal mine workers.

The invention discloses a power device drain-source parasitic capacitance sub-circuit model and a modeling method thereof, and in the power device drain-source parasitic capacitance sub-circuit model, a drain-source capacitor Cds is modeled by adopting a method of adding a variable capacitor between a drain end node and a source end node. The method comprises the following steps: firstly, processing data by utilizing Origin data processing software in combination with actually measured data of drain-source capacitor voltage of the tape-out device; analyzing and establishing a fitting formula of capacitance and voltage in Origin to obtain a corresponding coefficient; inputting corresponding fitting formula coefficient data in the model file according to a format to obtain a complete model; finally, adopting an HSPICE simulator to simulate the result that the drain-source capacitance changes along with the drain-source voltage, wherein the result shows that compared with a conventional method for modeling the drain-source capacitance of a power device through a diode junction capacitor, modeling of the drain-source capacitance through the method is more flexible and accurate.