76results about How to "Experimental process safety" patented technology

The invention discloses an oil paper insulation electric heating combined aging sealing system, is used for a strict oil paper insulation electric heating combined aging experiment, and includes an electrical aging sealing system, a thermal aging sealing system, an oil storage tank and a nitrogen gas cylinder. The thermal aging sealing system includes a sealing cavity capable of being opened, and a thermal aging system pressure gauge and a temperature control meter are arranged on a side wall of the sealing cavity; and the electrical aging sealing system is arranged in the sealing cavity of the thermal aging sealing system, and includes a cavity with an upward opening, the top of the cavity is sealed through an epoxy sealing plate, an oil filling port and an inflation inlet are arranged on the epoxy sealing plate, an electrical aging system pressure gauge and a vacuum extraction opening are arranged on a cavity wall of the cavity, the cavity is internally provided with an electrical aging electrode used for an experiment, and a high voltage end and a grounding end of the electrical aging electrode are led out through the epoxy sealing plate; and the oil storage tank and the nitrogen gas cylinder are connected to the oil filling port and the inflation inlet respectively through high temperature pipes.

The invention relates to a polyaniline nano particle/two-dimensional layered titanium carbide composite material and a low-temperature preparation method of the polyaniline nano particle/two-dimensional layered titanium carbide composite material. The preparation method comprises the following steps: firstly, adding a two-dimensional layered nano material MXene-Ti3C2 into an oxalic acid solution, and uniformly dispersing to obtain a Ti3C2 mixing solution; adding aniline into the Ti3C2 mixing solution, and uniformly dispersing to obtain a mixing solution; and adding a catalyst into the mixing solution drop by drop, carrying out stirring polymerization till the mixing solution is gradually changed from a transparent solution into a uniform black solution, and carrying out washing and drying to obtain the polyaniline nano particle/two-dimensional layered titanium carbide composite material. According to the method for preparing the PANI/Ti3C2 composite material at low temperature of 0 to 5 DEG C, oxidization of Ti3C2 is reduced, and the advantages of a Ti3C2 two-dimensional layered structural material are retained; and furthermore, reaction is carried out in an organic acidic solution to modify a functional group on the surface of Ti3C2, so that PANI and Ti3C2 are combined more tightly, and the electrochemical property of the material is improved.

The invention relates to a high-temperature high-pressure heat-insulated oxidation experiment system and method. The system comprises a pressure tracking and compensating module, an experimental container module, a sample injection module and an upper control module; the experimental container module is located in the center of the system and is connected with the pressure tracking and compensating module and the sample injection module separately; the experimental container module comprises a model injection port, experiment oil sand, a model kettle, high-strength bolts, flanges, a rock-core steel jacket, a model closure head, a kettle end cover, a kettle closure head, a model outlet, chamber filler, an igniter system, a temperature sensor, a heating element, heat insulating layers, a thermal tracking element, a temperature detector, an annular pressure injection port and a pressure-sensing point. According to the system and the method, the structure is novel, heat insulation is achieved through a temperature compensating element and the thin-walled rock-core steel jacket with good heat conductivity, and meanwhile, the pressure tracking and compensating module is arranged to ensure that the thin-walled rock-core steel jacket cannot be damaged by too high pressure, so that an experiment can more actually simulate an oxidation reaction process.

The invention, which belongs to the field of coal mine disaster prevention and control, provides a simulated analysis device and method for pressure regulation and ventilation of a multi-level goaf ofa coal seam group. The device comprises a simulated working face, a simulated roof rock layer, a simulated local-layer goaf, and a simulated upper goaf. The simulated working face includes an inlet way pipeline, a coal mining face pipeline, a return air pipeline, a small fan, a simulated wind window, a color smoke release box, a wind pressure sensor, an oxygen and the sulfur hexafluoride concentration sensor. The simulated local-layer goaf and the upper goaf are glass steel box bodies with transparent glass balls filling the insides and are provided with multiple oxygen and sulfur hexafluoride concentration sensors and wind pressure sensors. Gas in the simulated working face, the local-layer goaf, and the upper goaf are set to have different colors. The air flowing rules and voltage regulation effects of the flowing fields of the working face and the multi-layer goaf are analyzed comprehensively, qualitatively and quantitatively by observing air flowing directions in various ventilation modes and real-time monitoring values of all sensors, thereby providing parameter guidance for engineering practice.

The invention relates to the field of biomedical bacteria resistance. A biomedical silicon rubber with an antibacterial property is prepared through the following steps: adding 50-80 weight parts of liquid silicon rubber into a beaker and stirring the liquid silicon rubber for 10 min; putting 5 parts of a graphene quantum dot coated nanosilver antibacterial agent in a 50 ml beaker, and adding 10 parts of a solvent for ultrasonic treatment for 30 min; adding the graphene quantum dot coated nanosilver antibacterial agent prepared in the step 2 into the liquid silicon rubber prepared in the step1 and stirring the mixture for 10 min; adding 1-2 parts of a curing agent into the solution prepared in the step 3 and stirring the solution for 5 min; and vulcanizing the solution by a pressing plateat a room temperature in a plate vulcanizer to obtain the biomedical silicon rubber with the good antibacterial property. The processed and modified silicon rubber has the advantage of continuing thebiocompatibility of conventional silicon rubber, the antibacterial property of the rubber is also improved, and the service time of the silicon rubber in biomedical field is prolonged.

The invention relates to a test tube clamp. The test tube clamp comprises an upper clamping block and a lower clamping block with recesses, and a handheld part connected with the lower clamping block, wherein the upper clamping block and the lower clamping block are connected through a metal wire with a spring; a space for clamping test tubes is formed between the recesses of the upper and lower clamping blocks; a supporting rod which can support the upper clamping block is arranged at the joint of the handheld part and the lower clamping block. The test tube clamp has the beneficial effects that the supporting rod which can support the upper clamping block is arranged at the joint of the handheld part and the lower clamping block, and the supporting rod is provided with a fixing device for fixing the upper and lower clamping blocks, so that the test tubes are prevented from dropping, the experimental process is safe and reliable, and the test tube clamp is simple in structure and convenient to use.

The invention discloses a safe and efficient determination method of protein content, which comprises the following steps: protein extraction: uniformly mixing a rice sample and an extraction reagent,carrying out ultrasonic extraction for 1-3 times, and carrying out ultrasonic extraction for 30-40 minutes at 45-55 DEG C and power of 300-500W each time; and after ultrasonic extraction, centrifuging to obtain supernate, fixing the volume to 25ml by using a constant volume reagent, and fully and uniformly mixing to obtain the protein extracting solution. According to the method, the sodium hydroxide ethanol water solution is selected, the starch gelatinization phenomenon does not exist in the extraction process, the protein can be completely extracted, the measured protein content of the sample is basically the same as that of a standard method, and the method is a complete extraction method and provides a basis for stable and accurate determination of the rice protein content. The method is good in repeatability and high in measurement result stability. Toxic reagents such as concentrated sulfuric acid, SDS and mercaptoethanol are not used, so that the safety of the experiment process is ensured, and the health of personnel is not damaged.

The invention discloses a method for measuring misch metal solid solubility in steel and iron materials. An absolute ethyl alcohol electrolyte of LiCl+ triethanolamine+ ethylene glycol+ diphenylguanidine+ benzene 1.5% is selected to carry out low-temperature electrolysis, and then solid solution rare earth is separated from rare earth second-phase inclusions, and convent measurement is carried out after treatment by means of a spectrophotometer. The method can achieve rare earth solid solubility measurement safely, reliably and cheaply in laboratory research and production practice, and has the advantages of being high in sensitive degree, safe in experimental process, easy and convenient to operate, and the like, and experimental equipment and drugs are cheap and easy to obtain, and the like.

The invention relates to a method for preparing graphene glass. The method comprises the following steps: 1) cleaning glass, respectively using water, ethanol, acetone, water, isopropanol and water for ultrasonically cleaning the glass, cleaning for 3-5 minutes at each time and using nitrogen for drying; 2) by taking the glass as a substrate, raising the environment temperature to 900 DEG C-1100 DEG C under low pressure environment, introducing reducing atmosphere gas, introducing carbon source gas at a flow rate of 10-200sccm into the carbon source gas, growing the graphene film for a period of time, and then naturally cooling the environment temperature to room temperature, thereby acquiring a graphene film on the quartz glass, wherein the carbon source gas is at least one of methyl alcohol gas and ethyl alcohol gas. The technical scheme of the invention provides the method for preparing the graphene film by taking methyl alcohol or ethyl alcohol as a carbon source; the flow of the required methyl alcohol or ethyl alcohol is less; the experimental process is safe; the acquired graphene film is uniform in thickness and high in quality; the graphene films in different thickness can be acquired; the graphene film with high adhesive force with the quartz glass sheet can be acquired.

The invention relates to a method for increasing the lubricating property and heat conductivity of water-based cutting fluid by polyvinylpyrrolidone modified graphene, comprising the following steps: (1) dissolving polyvinylpyrrolidone in ethanol, then dissolving graphite powder in the polyvinylpyrrolidone ethanol solution, and finally carrying out ultrasonic treatment for 1-10 hours; (2) centrifuging the solution after ultrasonic treatment at the rotation speed of 2000-8000rmp for removing bottom sediments, taking the supernatant solution, and centrifuging the supernatant solution for 1-4 times for removing insoluble graphene in the solution; (3) adding 0.5-3 times of petroleum ether into the solution obtained in the step (2), and centrifuging at the rotation speed of 2000-8000rmp for removing the supernatant solution; and (4) removing ethanol from the petroleum ether-purified solution in an oven at 50 DEG C, and drying to obtain a final product. The method is capable of improving the lubricating property and heat conductivity of the water-based cutting fluid, the whole process is simple and safe, the cost is low, the period is short, and the effect is obvious.

The invention relates to a method for in-situ preparation of layered double hydroxide anticorrosive coatings on the surfaces of magnesium and magnesium alloys. The method comprises the steps that hydroxide coatings of a metal A element are prepared on the surfaces of the magnesium and the magnesium alloys, and the hydroxide coatings of the metal A element are converted into the layered double hydroxide anticorrosive coatings through chemical conversion; and the A element of the hydroxide coatings of the metal A elements is one of Fe and Mn, and preferably, the hydroxide coatings of the metal Aelements are hydroxyl oxidized iron (FeO(OH) or manganese oxyhydroxide (MnO(OH).

The invention discloses a plastic part quality monitoring method. The plastic part quality monitoring method comprises the following steps: obtaining an organic extract of a to-be-detected part as a to-be-detected extract, taking the obtained organic extract of the raw materials of a to-be-detected part nominal band as a nominal extract; performing Fourier transform infrared spectroscopy tests on the to-be-detected extract, taking the measured infrared spectrogram as the to-be-detected infrared spectrogram, performing the Fourier transform infrared spectroscopy test on the nominal extract, taking the measured infrared spectrogram as the nominal infrared spectrogram; if the to-be-detected infrared spectrogram and nominal infrared spectrogram are matched, the to-be-detected part and the raw materials of the nominal band are consistent, otherwise, the to-be-detected part and the raw materials of the nominal band are inconsistent. The plastic part quality monitoring method uses different characteristics of a product band formula of raw material suppliers for identifying the band of the materials of the part, can effectively monitor the problem of raw material replacing for the suppliers, and can realize the monitoring of the product quality.

The invention relates to a method for preparing functionalized carbon-coated magnetic nanoparticles. The method comprises the following steps: (1) dissolving ferrocene in acetone, and performing ultrasonic stirring so as to form a uniform solution; (2) adding polyacrylic acid into the uniform solution obtained in the step (1), and performing magnetic stirring so as to form a precursor; (3) performing a heated heat-preservation reaction on the precursor obtained in the step (2), performing cooling after the reaction is completed, removing the supernate, performing washing with acetone, and performing magnetic separation, thereby obtaining the functionalized carbon-coated magnetic nanoparticles. Compared with the prior art, the functionalized carbon-coated magnetic Fe3O4 nanoparticles prepared by using the method are synthesized by using a solvent heating method, the prepared magnetic submicrospheres are uniform in particle size, good in stability, free of aggregation among particles, and excellent in magnetic property.

The invention discloses a preparation method of a Ti4O7 coating on the surface of a metal titanium bipolar plate of a proton exchange membrane fuel cell. The preparation method comprises the following steps of (1) taking a pure Ti plate as a base material, and carrying out surface cleaning work such as polishing, ultrasonic cleaning and the like on the base material; (2) preparing a TiO2 thin film, specifically, putting the cleaned Ti plate into a high-temperature tube furnace, and calcining and oxidizing for 420 minutes in air at 700 DEG C to obtain the rutile type TiO2 thin film on the surface of the Ti plate base material; (3) preparing a reducing agent, specifically, mixing nano TiO2 powder and Ti powder in proportion, and uniformly grinding by using a mortar to obtain the reducing agent; and (4) preparing the Ti4O7 coating, specifically, embedding the Ti plate base material treated in the step (2) into the reducing agent, putting the Ti plate base material into a vacuum tube furnace, and calcining for 10 minutes at 880 DEG C under the protection of inert gas to obtain the Ti4O7 coating on the surface of the metal titanium bipolar plate of the proton exchange membrane fuel cell. According to the method, H2 does not need to be used as the reducing agent, the whole operation process is simple and safe, the reaction time is short, the production efficiency is high, and the prepared Ti4O7 coating is good in binding property with a matrix and compact and complete.

The invention relates to the technical field of electronic electrical engineering experiment tables and provides an electronic electrical engineering experiment table. The electronic electrical engineering experiment table comprises a table plate and supporting legs, wherein the upper ends of the supporting legs are arranged at four corners of the bottom surface of the table plate; an experiment power connection area, an assembly and disassembly area, a tool taking area and a part recovery area are arranged on the surface of the table plate; the experiment power connection area is provided with a power line, an adjustable transformer and an inverter; the power line is electrically connected with the adjustable transformer; the inverter is electrically connected with the adjustable transformer; an AC wiring terminal is arranged on the adjustable transformer, and a DC wiring terminal is arranged on the inverter; the AC wiring terminal and the DC wiring terminal are connected with the adjustable transformer and the inverter through spiral wires respectively; the assembly and disassembly area is provided with an insulating cushion plate, a part temporary-storage tank and a lighting lamp; the tool taking area is provided with a tool tank, a tool separation plate and a tool tank cover; the part recovery area is provided with a part tank, a part separation plate and a part tank cover. The electronic electrical engineering experiment table makes an experiment voltage adjustable within a large range, makes a lighting area adjustable, and is convenient to move and high in safety.

The invention discloses an underwater light source device with a hairbrush and a diaphragm for an underwater optical experiment with a light source. The underwater light source device comprises a light source, a stepping motor, a rotary shaft, a diaphragm system and an oscillating bar. The rotary shaft is connected to the output shaft of the stepping motor, the oscillating bar is arranged on the rotary shaft, and the rotary shaft rotates to drive the oscillating bar to control the diaphragm system to be turned on and off; the diaphragm system is attached to the light source for controlling illumination of the light source to pass through and to not pass through and clean the surface of the light source. The underwater light source device disclosed by the invention effectively avoids dangers due to instable working state as the light source is turned on and off when the power of the light source is relatively great (greater than 100W) and relatively large current on and off, the time required by waiting the working state of the light source to be stable is shortened, and the experimental efficiency is increased. Moreover, the surface of the light source is immediately cleaned to prevent attachments such as water drops and floats on the lamp wall from affecting illumination, so that the result obtained from the underwater experiment is more accurate and the experimental flow is safer.