Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

2199results about "Weighing by removing component" patented technology

Experimental device and experimental method for transformer oilpaper insulating thermal ageing

The invention belongs to the technical field of transformer ageing detection. An experimental device for transformer oilpaper insulating thermal ageing consists of an outer cavity, an inner cavity and a measurement-display system, wherein the inner cavity consist of a main cavity body, an oil conservator on the main cavity body, an electrode-sample test frame inside the main cavity body and a minor cavity body; the minor cavity body and the main cavity body are connected through a pipeline; a valve is arranged on the pipeline; and an air exhaust port and an oil injection port are arranged on the main cavity body. An experimental method for transformer oilpaper insulating thermal ageing comprises the following steps: 1) performing insulating-paperboard vacuum dry sample treatment; 2) placing sample and injecting oil; 3) installing the minor cavity body; 4) injecting transformer oil; 5) accelerating thermal ageing experiment; 6) measuring dielectric parameters on line to acquire related experiment data; and 7) analyzing off-line sample physicochemical parameters to acquire experiment data. The invention can measure the dielectric parameters of the samples on line in real time, regularly samples on the premise of not changing the prior test environment of the samples, and can research thermal ageing laws of oilpaper insulating materials of large-scale power transformers.

Judging method of solid insulating and aging degrees of transformer

The invention relates to a judging method of the solid insulating and aging degrees of a transformer, which sequentially comprises the following steps of: 1. preparing a gradient concentration standard solution of a furfural solution, carrying out liquid chromatographic detection, and making a standard curve I; 2. taking insulating paper samples in an actual electric network transformer, carrying out the liquid chromatographic detection, and obtaining the furfural concentration in each sample according to the standard curve I; 3. respectively measuring the water content H thereof by adopting the insulating paper samples in the step 2, computing the dry paper concentration C, additionally sampling, measuring the specific viscosity thereof, and computing the polymerization degree of the insulating paper samples according to a Martin empirical formula; 4. making a standard curve II by using the polymerization degree of insulating paper as an abscissa and using the logarithm of the furfural concentration as an ordinate; and 5. measuring the furfural concentration for an unknown sample, obtaining the polymerization degree of the insulating paper according to the standard curve II in the step 4, and judging the solid insulating and aging degrees of the transformer according to an IEC60450 standard. The method only needs to extract proper oil samples, has simple operation, does not need power failure, and is a quite practical method.

Controllable fast-heating up thermobalance reacting furnace

The invention discloses a controllable fast-heating up thermobalance reacting furnace, comprising a high temperature furnace reaction unit, a balance weighting device, an air control device and an electronic control unit, wherein the high temperature furnace reaction unit uses two-section heating, the temperature of the furnace body is set, collected and transmitted by the electronic control device; and when in an experiment, the air control device adjusts the air atmosphere in the high temperature furnace reaction unit, a sample is rapidly placed in a constant temperature zone of the high temperature furnace reaction unit to realize rapid heating up by a balance lifting mechanism in the balance weighting device, and mass change of the sample is converted into electronic signals in real time to be transmitted to the electronic control device for continuous monitoring and storing. The invention has the characteristics of large controllable range of heating rate, large range of test sample amount and controllable reaction atmosphere, thus meeting the requirement of the thermobalance test research under various reaction conditions with different sample amounts and heating rate; and common measurement equipment can perform on-line air component analysis, thus being favor of disclosing the action mechanism and control strategy in the reaction process.

Microwave moisture analyzer: apparatus and method

A toploading weighing instrumentality which determines loss on drying by a cylindrical microwave. The cylindrical cavity of the microwave includes a power supply, a magnetron, a power module operatively coupled between said power supply and said magnetron for driving said magnetron, a wave guide communicating with the magnetron and with a microwave containment chamber for delivering energy thereto, at least one microwave energy sensor for sensing microwave energy or magnetic and/or electric field strength within the chamber for controlling, inter alia, the loss on drying process of the sample being assayed and determining when the drying process is complete. A precision electronic balance is operatively disposed within the microwave chamber for allowing a specimen being assayed to be weighed. In addition, a ventilation chamber is provided for venting moisture from the microwave chamber. A processing unit and associated memory allows means for data acquisition, processing and storage of data from the power module driving the magnetron, the microwave energy sensor(s) for sensing magnetic and/or electric fields and the electronic balance for weighing the initial and final weights of the specimen for loss on drying moisture analysis. Both signaling the removal of microwave energy in the chamber.

Method for measuring contents of silicon-calcium elements in silicon-calcium alloy

The invention relates to a method for measuring the contents of silicon-calcium elements in a silicon-calcium alloy. After a sample is grinded and passes through an analysis sieve with 180-200 meshes, the method provided by the invention is characterized in that the sample is fused at high temperature by adopting an alkali fusion method; the fusion course comprises the steps of: weighing and adding the sample and sodium hydroxide solid to a nickel crucible; after adding the mixture to a high temperature furnace to be heated, taking out and cooling; washing the fused analysis sample to an evaporation dish by utilizing deionized water and hydrochloric acid; drying and adding the hydrochloric acid to be acidized; adding warm water to be stirred until soluble salts are completely dissolved; instantly filtering by utilizing quantitative filter paper; enabling the filtrate to be constant volume in a volumetric flask to prepare a sample analysis solution; and maintaining the precipitations to be analysis components. The method for respectively measuring the contents of silicon and calcium provided by the invention comprises the following steps: measuring the content of the silicon with precipitation and filter paper by utilizing a weight analysis method after ashing, firing, cooling and weighing; and measuring the content of the calcium with the sample analysis solution by utilizing a volumetric method. The method provided by the invention has the advantages of once sample weighing, multi-element continuous measurement, time and labor saving, energy conservation, consumption reduction and the like and can reduce the damage of hydrofluoric acid to human bodies and environments.

Standard distribution sample for detecting comprehensive performance of environmental chamber and detection method thereof

The invention relates to a standard distribution sample for detecting comprehensive performance of an environmental chamber and a detection method thereof and belongs to the field of indoor environment detection. The sample comprises a polytetrafluoroethylene cylindrical container of which the upper end is opened, organic volatile matter VOC liquid accommodated in the container, a barrier layer arranged on the upper end face of the cylindrical container and a sealing device fixing the barrier layer. The method comprises the following steps of: establishing a model; measuring the ventilation rate of the environmental chamber to be detected; placing the sample in the environmental chamber to be detected, placing the sample on an electronic balance, and recording the mass change of the standard distribution sample in real time; when the environmental chamber is in a sealed state, distributing the VOC liquid in the cylindrical container, calculating a distribution rate with the model according to the mass change, and calculating VOC concentration in the environmental chamber; acquiring the VOC concentration at an outlet of the environmental chamber in real time; and comparing the measured value and the calculated value of the VOC concentration to evaluate the comprehensive performance of the environmental chamber. The standard distribution sample and the detection method for the standard distribution sample have the advantages of simpleness and convenience, easy operation and relatively high precision and reliability.

Experimental device and representation method of multiphase medium high-temperature corrosion rate

The invention discloses an experimental device and a representation method of multiphase medium high-temperature corrosion rate. The experimental device comprises an air distribution device, a heating device and a tail gas treatment device which are communicated sequentially, wherein the air distribution device comprises a mixing device and a plurality of air bottles which are communicated with the mixing device; a quality flow meter connected with a computer is arranged among the mixing device and the air bottles; and the heating device comprises a heating furnace and a quartz tube reactor in the heating furnace. The representation method comprises the following steps: carrying out a gas phase or gas-liquid phase high-temperature corrosion experiment on a test sample according to the experiment requirement, thereby obtaining the decrement of the weights of the test sample before and after being corroded, and then converting the decrement into the thickness of the corroded test sample as the generation thickness of the corrosion layer during the test period of the test sample; and carrying out line energy spectrum line scanning experiment on the corroded test sample, thereby obtaining the maximal migration depth of a corrosive element in the thickness of the test sample, and finally calculating the high-temperature corrosion rate. By adopting the experiment device and the representation method provided by the invention, the high-temperature corrosion rate and the corrosion degree of a corrosive factor on the test sample are truly reflected from the macroscopic and microcosmic views.

Test method for blast furnace coke reactivity

ActiveCN103940697AReduce usageAvoid deviations caused by different reaction ratesWeighing by removing componentPhysical chemistryData acquisition
The invention provides a test method for blast furnace coke reactivity. According to the method, conventional equipment is utilized, by obtaining the weight loss rate variation of coke at different temperature and the initial temperature of the carbon solution loss reaction of coke, the reactivity of coke is characterized. The method comprises: grinding a selected to-be tested coke sample into fine powder, drying, taking out the coke sample, cooling to room temperature, sealing for usage; weighing the coke sample for usage, putting in a test apparatus, continuously raising the temperature, introducing a reaction gas CO2, when the heating terminal point is reached, finishing computer data acquisition, and storing the acquisition data; finally processing the data acquired by a computer; and finally characterizing the reactivity of coke by obtaining the weight loss rate variation of coke at different temperature and the initial temperature of the carbon solution loss reaction of coke. According to the method, test equipment such as a thermo gravimetric analyzer and the like are employed, the reaction situation of coke with CO2 at different temperature can be comprehensively analyzed, and true objective evaluation on the reactivity of cokes with different quality can be made.

Method for determining spreading rate of paper-process reconstituted tobacco finished products

The invention relates to a method for determining the spreading rate of paper-process reconstituted tobacco finished products, which belongs to the technical field of reconstituted tobacco. The method includes steps: a, taking a certain quantity of paper-process reconstituted tobacco and a sheet base to be shredded, and the placing the tobacco shreds into a constant-temperature and constant-humidity box with the temperature of 22 DEG C and the humidity of 60% to balance for 48 hours; b, weighing a certain quantity of reconstituted tobacco shred samples m1 to be placed in a solvent cup of a Soxhlet extractor, adding distilled water according to feed to liquid ratio of 1:30, and setting the circulation times of the Soxhlet extractor to be 10 times, and the extracting temperature to be 19-level and the temperature of a condensing circulation pump to be 2 DEG C to extract; c, taking out the samples after extraction is finished, transferring the samples into an aluminum box reaching the constant weight of m0, placing the aluminum box into a drying oven, drying the samples at the temperature of 100+/-1 DEG C so that the constant weight of the aluminum box is m2, realizing the precision of the constant weight to be 0.001g, determining moisture content w of the samples, and extracting the sheet base of the reconstituted tobacco by the same method; and d, calculating the spreading rate according to a formula. The method has the advantages that the method is simple, and is applicable to determining the spreading rate of the paper-process reconstituted tobacco finished products.

Measurement method of coating rate of paper-making reconstituted tobacco

ActiveCN103149114ASolving Detection ChallengesReliable technical parametersWeighing by removing componentPulp and paper industryY-Coordinate
The invention discloses a measurement method of a coating rate for a paper-making reconstituted tobacco. The method comprises the following steps of: (1) drying a sample box and a paper-making reconstituted tobacco finished product, cooling the dried sample box and the dried paper-making reconstituted tobacco finished product in a dryer, weighing the sample box and recording the value as m0, and weighing the paper-making reconstituted tobacco and recording the value as m1; (2) placing the paper-making reconstituted tobacco in the sample box, soaking the sample box with the paper-making reconstituted tobacco in water twice, filtering the resulting product, drying the filtered product, cooling the dried product in the dryer, weighing the cooled product and recording the value as m2; and (3) calculating the coating rate x for the paper-making reconstituted tobacco: x=[m1-(m2-m0)]/m1*100%; or simultaneously carrying out step (1) and step (2) on a plurality of samples of the paper-making reconstituted tobaccos at different weights, and fitting a straight line by taking m1 as X-coordinate, m1-(m2-m0) as Y-coordinate to obtain a gradient, namely, the coating rate X. The measurement method of the coating rate for the paper-making reconstituted tobacco is simple, convenient, and capable of accurately and objectively measuring the coating rate of the paper-making reconstituted tobacco.

Application and method of TGA-IR-GCMS triple machine in tobacco analysis

The invention relates to an application and a method of a TGA-IR-GCMS triple machine (thermogravimetric analyzer-infrared spectrometer-gas chromatography mass spectrum) in tobacco analysis. A thermogravimetric-infrared-gas chromatography mass spectrum (STA-IR-GC-MS) triple machine is employed to perform thermogravimetry-infrared-gas chromatography mass spectrum analysis for components of cigarette smoke. A cigarette sample is placed in a thermogravimetric sample cup; high-purity nitrogen or an oxygen-nitrogen gas mixture is introduced into the thermogravimetric analyzer; preliminary determination of the structure is performed by purging pyrolysis products of the sample in such atmosphere by the gas into an online-detecting infrared spectrometer; then accurate qualitative determination of the cigarette sample is performed by purging the products by the gas into a GC-MS for detection; and pyrolysis products of different time points and temperature points are analyzed. The method of the invention has the characteristics of simple operation, rapid analysis speed, comprehensive detection and the like, can perform online detection, analysis and qualitative determination of the pyrolysis products of the cigarette, and provides a scientific and reliable analysis method for mechanism and principle research in aspects of cigarette additives, safety evaluation, harm reduction and tar reduction, etc.

Method for measuring and calculating all iron content in imported iron ore

The invention relates to a method for measuring and calculating all iron content in imported iron ore. The steps are as follows: 1. preparing a sample into an analytical sample according to the standard; 2. firing and weighing the analytical sample to obtain the sample firing decrement LOI; 3. fusing the sample with the firing decrement tested according to the standard to prepare a test sample; 4. placing the prepared test sample into an X-ray fluorescence spectrometer to test the content of each element to be tested, and storing the data into the test software database of the X-ray fluorescence spectrometer; 5. using an infrared carbon and sulfur tester to test the content of S in the analytical sample; 6. working out the computational formula on TFe={100%-(SiO2+Al2O3+CaO+1.2912*Mn+MgO+2.2914*P+Na2O+K2O+2.4971*S+TiO2)*(1-LOI)%}*0.6994 in Excel; and 7. substituting the firing decrement and content of each element into the computational formula to automatically calculate the all iron content TFe in the sample to be tested. The application of the calculating method can solve most of all iron measurement problems, thus exerting tremendous effect in practical test work, greatly shortening workflow, improving working efficiency, ensuring license authorizing efficiency, and satisfying the requirements of test work under the condition that iron ore import increase rapidly.

Gas hydrate sampling and analyzing method and device

ActiveCN102607885AEvenly sampledAnalytical methods are accurate and reliableWeighing by removing componentComponent separationGas phaseDecomposition
The invention discloses a gas hydrate sampling and analyzing device and a method. The device comprises a hydrate generation kettle, a sampling module, a drive control module, a sample decomposition module, a weighing analysis module and a vacuumizing module, wherein a stirrer is arranged in the hydrate generation kettle; a gas inlet pipe and a liquid inlet pipe are connected to the top part of the hydrate generation kettle; the sampling module is formed by a transparent high pressure resistant resin glass tube, an upper compression piston, a lower compression piston, an upper hydraulic linkage shaft, a lower hydraulic linkage shaft and a sample delivery pipe; the weighing analysis module comprises an electronic analytical balance, a gas chromatograph and relevant connecting pipelines and components; the drive control module comprises a compression piston, a drive linkage shaft, a hydraulic driver, a spiral elevator, a control computer and the like; and the vaccumizing module is formedby a vacuum pump and relevant connecting pipelines and components. Any height space in a reaction kettle can be sampled with any volume, and any phase state of gas phase, solution phase, hydrate slurry phase and hydrate phase in a hydrate reaction system can be sampled and analyzed.
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products