184 results about "Liquid viscosity" patented technology

The invention relates to the technical field of filling automation control, in particular to a full-automatic essential balm filling control system based on PLC online monitoring, which comprises a filling parameter real-time acquisition module, a dynamic coupling analysis module, a multi-axis cooperative execution module, a foreign matter real-time detection module, an interlocking control module and a filling quality feedback module. Wherein the filling parameter real-time acquisition module is used for acquiring temperature data of a filling head, a liquid viscosity value and the flow velocity of a filling pipeline in real time; and the dynamic coupling analysis module is used for establishing a correlation model of the temperature gradient and the viscosity change rate and generating a dynamic compensation parameter set. According to the method, the nonlinear correlation model of the temperature and the viscosity change rate is constructed, and the dynamic compensation parameter set is generated, so that self-adaptive precise control in the filling process and automatic response linkage of abnormal working conditions are realized, and the stability and the intelligent level of a filling system are remarkably improved.

The invention discloses a deep learning and automatic control chemical reactor and a resource recovery method, and relates to the technical field of hydrometallurgy, and the deep learning and automatic control chemical reactor comprises a chemical reactor, a motor, a heating device, a monitoring device, a data center and a PLC control system. Based on a PLC control system, a Transform-LSTM time sequence prediction model is integrated, so that real-time monitoring of parameters such as mixed liquid temperature, reaction chamber pressure, mixed liquid viscosity, conductivity and the like in a wet leaching reaction process can be realized; and the heating power of the heating device, the rotating speed of the motor, the raw material adding amount of the feeding port, the mixed material discharging time of the discharging port and the air displacement of the air exhaust port can be automatically and accurately controlled. The problems that stirring efficiency is low, parameter regulation and control are lagged, and manual experience is relied on are solved, through a predictive control strategy, the real-time monitoring and dynamic regulation level is remarkably improved, the wet leaching process is optimized, energy consumption is reduced, the high-grade metal leaching efficiency is improved, and the method is suitable for various wet metallurgy processes.

The invention relates to the technical field of lubricating oil monitoring, in particular to a compressor lubricating oil online monitoring vibration diagnosis method and system, and the method comprises the steps: obtaining vibration signal data of a compressor bearing, a connecting rod mechanism and a piston assembly and lubricating oil medium parameters, arranging the data according to a time sequence, and generating a lubrication working condition time sequence signal data set; according to the method, through time sequence matching of vibration signal data and lubricating oil state parameters, a lubricating working condition time sequence signal data set is established, and in combination with time window division, the bearing vibration frequency offset, the piston transverse impact amplitude and the connecting rod torsional vibration change rate are extracted; and calculating the viscosity drop rate, the temperature change range and the pollutant particle growth rate of the lubricating oil, screening the correlation trend of the bearing vibration frequency offset before and after the change of the lubricating state, and enhancing the lubricating state recognition capability.

The invention discloses a liquid viscosity detection device, and particularly relates to the field of viscosity detection.The liquid viscosity detection device comprises a base, a control box and a bathtub are arranged on the base, the bathtub is used for containing constant-temperature bath liquid, a cylinder cover covers the bathtub, an opening is formed in the cylinder cover, and a capillary tube clamp is arranged at the opening; the capillary tube clamp is used for clamping the capillary tube viscometer, the capillary tube viscometer extends into the bathtub, a heating assembly and a stirrer are mounted on the cylinder cover, the heating assembly is used for heating constant-temperature bath liquid, and the stirrer is used for stirring the constant-temperature bath liquid. The capillary viscometer extends into the bathtub, the constant-temperature bath liquid is heated by the heating assembly, and the stirrer is used for stirring to uniformly distribute heat, so that the temperature of the to-be-detected liquid in the capillary viscometer can be kept constant, and the viscosity of the to-be-detected liquid under a certain temperature condition can be detected; and the influence of environment temperature change is avoided.

The invention discloses a preparation method of high-viscosity cationic starch, which belongs to the technical field of modified starch, and comprises the following steps: crosslinking epichlorohydrin, ball-milling and cationizing; the epoxy chloropropane crosslinking comprises the following steps: mixing starch, calcium hydroxide and deionized water, stirring at 40-50 DEG C, adding sodium stearoyl lactylate, stirring at 50-55 DEG C, naturally cooling to room temperature, adding sodium chloride and epoxy chloropropane, stirring, dropwise adding a potassium hydroxide aqueous solution, stirring, adjusting the pH value to 6, filtering, taking filter residues, washing and drying to obtain crosslinked starch; in the step of ball milling, calcium hydroxide, sucrose fatty acid ester SE-11 and deionized water are mixed and then subjected to ball milling, and a ball-milled material is obtained; the prepared high-viscosity cationic starch is high in paste liquid viscosity and cationic substitution degree, good in paste liquid viscosity stability, uniform in substitution degree and paste liquid viscosity, high in reaction efficiency in cationization and low in alkali consumption.

The invention discloses a liquid viscosity measuring system and an auxiliary device. The device comprises a measuring tube, a liquid level sensor and an auxiliary device, the sensor assembly is arranged at one end of the measuring tube and comprises a PCB (Printed Circuit Board) and an ultrasonic transducer on the PCB, and the PCB is configured to excite the ultrasonic transducer to transmit an ultrasonic signal and collect the ultrasonic signal received by the ultrasonic transducer; the reflecting end is arranged at the other end of the measuring tube and faces the ultrasonic transducer, a closed measuring space is formed between the reflecting end and the sensor assembly, so that liquid cannot leak after being injected into the measuring space, and an ultrasonic signal transmitted by the ultrasonic transducer can be reflected back by the reflecting end after penetrating through the liquid and is received by the ultrasonic transducer; and the propagation speed and signal attenuation of the ultrasonic waves related to the liquid viscosity in the liquid are obtained based on the ultrasonic signals received by the ultrasonic transducer. According to the invention, the propagation velocity and signal attenuation of ultrasonic waves in different liquid media are accurately measured by flexibly changing measurement conditions, so that accurate evaluation of the liquid viscosity is realized.

The invention provides an electronic atomized liquid viscosity prediction method, a model and a model construction method, and the prediction method comprises the steps: providing a pre-constructed electronic atomized liquid viscosity prediction model, the electronic atomized liquid viscosity prediction model being configured with a function relationship between the viscosity of the electronic atomized liquid and the components and temperature of the electronic atomized liquid; acquiring viscosity detection data, component data and target temperature of the target sample; adjusting parameters of the electronic atomized liquid viscosity prediction model according to the viscosity detection data to obtain a target viscosity prediction model; and determining the predicted viscosity of the target sample according to the target viscosity prediction model, the component data and the target temperature. By establishing the function relationship between the viscosity of the electronic atomized liquid and the data of each component of the electronic atomized liquid and the temperature data, the viscosity change rule of the target sample can be determined from numerical values, reference is provided for subsequent adjustment of a new formula of the electronic atomized liquid, the experiment frequency and cost of viscosity detection are reduced, and the detection accuracy is improved. And a theoretical basis is provided for setting storage and transportation conditions.

The invention discloses a method for predicting fluid liquid phase viscosity based on a free volume theory, and relates to the technical field of fluid thermophysical property theoretical calculation, and the method comprises the following steps: step 1, obtaining material parameters related to a to-be-measured fluid, and establishing a corresponding free volume theoretical viscosity model; 2, improving the free volume theoretical viscosity model to obtain a correction model; and 3, fitting the correction model and the material parameters, and calculating the viscosity of the fluid to be measured. The method can effectively reduce the calculation deviation of the viscosity.

The invention belongs to the field of liquid viscosity measurement, and provides a suspended rotational viscometer and a use method thereof. An outer cylinder upper / lower magnet is mounted at the upper / lower end of an outer cylinder of the viscometer; two fixing rings are installed in the middle of the outer cylinder, an outer multi-pole magnet is sleeved between the two fixing rings, and a constant-speed rotation driving system is arranged on the outer side of the outer multi-pole magnet. Inner cylinder upper / lower magnets are mounted at the upper end / lower end of the inner cylinder; the outer cylinder upper / lower magnet and the inner cylinder upper / lower magnet repel each other in magnetic force, and the inner cylinder suspends in the outer cylinder; the upper portion of the inner cylinder is provided with a sensing element, and the lower portion of the inner cylinder is provided with a counterweight ring. According to the using method, a relation curve between the liquid viscosity and the rotating speed of the inner cylinder is obtained through the liquid with the known viscosity, the actually measured rotating speed is compared with the relation curve in the using process, and the accurate liquid viscosity is obtained. The problem that an existing product cannot perform sealed measurement is solved, external interference is reduced, and the measurement result is more reliable.

The utility model relates to the field of petroleum engineering, and discloses an acid rock reaction kinetics and flow conductivity parameter measuring device which comprises a first acid storage tank, a booster pump, a high-pressure gas storage tank, a pressure regulator, a high-temperature and high-pressure reaction kettle, a rock plate reaction kettle, a second acid storage tank, a sample collecting tank, a waste liquid tank and a liquid collecting tank which are sequentially connected through a pipeline, the acid liquor is input into the high-temperature and high-pressure reaction kettle after being regulated by the pressure regulator, is fully mixed with the additive and then enters the rock plate reaction kettle to be subjected to acid-rock reaction with the experimental rock plate, and the rock plate reaction kettle is subjected to water injection pressurization and confining pressure control through the pressure applying device. According to the utility model, two experiments of acid rock reaction kinetics and flow conductivity are combined to simulate the reaction speed of the acid rock under the conditions of different temperatures and pressures and different acid liquid viscosities, so that the mass loss caused by rotation of a rock plate is avoided, the influence of insufficient stirring on an experiment result under high-viscosity liquid is overcome, and the experiment efficiency is improved. And the accuracy of a measurement result is improved.

The invention relates to the technical field of control systems, in particular to a regulation and control method and system for a separation device, and the method comprises the steps: obtaining real-time monitoring data; determining a pressure abnormal quantity; determining an abnormal liquid inlet fluid area; determining the performance similarity of the inlet liquid false blocking pressure; determining the state of the filter membrane; when the state of the filter membrane is false blockage, the liquid inlet speed is adjusted, and the pressure abnormal quantity is adjusted; when the filter membrane is actually blocked, an alarm is triggered. According to the method, the pressure data of the liquid inlet end and the liquid outlet end of the filter membrane are collected in real time, and triple judgment logic of similarity of pressure abnormal quantity, abnormal liquid inlet fluid area and liquid inlet false blockage pressure expression is constructed, so that false blockage caused by liquid viscosity or concentration fluctuation and true filter membrane blockage can be accurately distinguished; and the misjudgment rate caused by traditional judgment only based on the pressure difference threshold value is remarkably reduced, unnecessary speed reduction or shutdown alarm is avoided, and continuous production is guaranteed.

Provided is a production method for a dispersion liquid capable of ensuring the film thickness of a low refractive index layer and achieving in-plane film thickness uniformity.　This production method is for a dispersion liquid in which particles are dispersed in a dispersion medium, the method being characterized in that: the particles are particles of a condensate of a material containing an alkoxy silane, that is, a condensate of a material containing a trifunctional organic silicon; a first pulverization step, a condensing step, and a second pulverization step are performed in the stated order; the first pulverization step is for pulverizing the particles in a liquid in which the particles are dispersed in the dispersion medium; the condensing step is for condensing the liquid; the second pulverization step is for further pulverizing the particles, in the liquid, pulverized in the first pulverization step; the viscosity of the liquid after the second pulverization step is greater than the viscosity of the liquid after the first pulverization step, or the concentration of the particles in the liquid after the second pulverization step is greater than the concentration of the particles in the liquid after the first pulverization step; and the density of the particles in the produced dispersion liquid is 3.5 wt% or more.

The invention discloses an electrical wire coating system with a wide glue solution viscosity range and a coating method thereof, and relates to the technical field of microsystems. A glue injection system; a glue injection system and a glue injection control module; and the scribbling motion system comprises a scribbling motion control module, an injection head motion displacement mechanism and a component motion displacement mechanism. According to the invention, the working modes are flexibly switched through the positive and inverted switching mechanism, the device adapts to the range from low viscosity to high viscosity, the positive mode assists conveying and coating of high-viscosity glue liquid by using pressure, and the inverted mode avoids dripping and line broadening of the low-viscosity glue liquid due to gravity; the defect that low-viscosity glue solution is infiltrated and widened due to the influence of gravity in a traditional forward mode is effectively overcome, meanwhile, the forward and reverse dual-system switching scheme can meet the requirements of different application scenes, and the problems that a traditional dual-independent system is long in switching time, single in application environment, repeated in system positioning and the like are solved.

The present invention relates to a visual detection method and a detection kit for lipase based on changes in liquid viscosity. The lipase detection method provided by the present invention generates a hydrogel after ions intervene in the reaction system to cause phase separation. Due to different viscosities and water contents in the supernatant, different flow distances are presented on the paper base; the flow distance on the paper base can be measured to achieve quantitative detection of the object to be detected. In addition, the invention relates to a paper-based biosensing method for detecting enzymes due to viscosity changes caused by phase separation, taking lipase as an example. The present invention combines sodium alginate and calcium ion cross-linking gelation, enzymatic hydrolysis reaction, phase separation to cause viscosity changes, and a detection method combined with a paper base to design a convenient, simple and sensitive sensing method. Taking lipase as an example, a two-step reaction of sodium alginate and calcium ions, triglycerides and lipase is combined to design a lipase paper-based detection method with high sensitivity, good specificity and simple operation, which has the potential for commercial detection.

A liquid ejection apparatus includes a nozzle, a pressure chamber, a piezoelectric element, a count processing portion, and a detection processing portion. The nozzle ejects a liquid. The pressure chamber communicates with the nozzle and contains the liquid. The piezoelectric element changes a pressure in the pressure chamber in response to an input of a drive signal. The count processing portion counts a number of times that an electric signal output from the piezoelectric element and corresponding to vibration generated in the pressure chamber in response to the input of the drive signal to the piezoelectric element exceeds a predetermined threshold value. The detection processing portion detects a viscosity of the liquid contained in the pressure chamber, based on a count result of the count processing portion.

The utility model relates to the technical field of oil path structures, and discloses an oil path structure of an open-close type oil viscosity analyzer, which comprises a shell and two runner plates rotationally connected through an open-close shaft, the outer sides of the two runner plates are respectively provided with an operation end cover, an electric heating sheet is arranged between the operation end cover and the corresponding runner plate, and the electric heating sheet is connected with the shell. An opening is formed in the top of the shell, and the two ends of the opening and closing shaft are detachably installed at the bottom of an inner cavity of the shell. According to the utility model, through the arranged opening and closing structure, oil can be quickly injected on the runner plate during use, meanwhile, the runner plate is limited and fixed through the shell, temperature control is realized by matching with the electric heating sheet, and compared with the prior art, the oil detection surface is always kept within a certain size through the mechanical clamping structure, so that the oil detection efficiency is improved. The oil detection precision and the consistency among different devices are improved, and the whole mechanism is easy to maintain and quick and convenient to operate.

The asphalt dynamic viscosity detection device comprises a capillary U-shaped pipe, a base and a clamping assembly, the capillary U-shaped pipe comprises an open end and a closed end, the base comprises a body and a first limiting part, the first limiting part is arranged on the body, the first limiting part comprises a supporting surface and a limiting surface, the supporting surface is parallel to the plane of the base, and the limiting surface is parallel to the plane of the base. The clamping assembly comprises a clamping part, a height adjusting mechanism and a supporting rod, the supporting rod is fixedly connected with the body, the axis of the supporting rod is perpendicular to the plane of the body, and the height adjusting mechanism reciprocates along the axis of the supporting rod. The axis of the height adjusting mechanism is perpendicular to the axis of the supporting rod, the clamping part is fixedly connected with the height adjusting mechanism, the clamping part and the height adjusting mechanism are coaxial, and the clamping part is used for clamping the opening end of the U-shaped capillary tube. According to the utility model, the problem that the viscous liquid is hung on the wall when being filled into the capillary U-shaped tube is solved, and the viscosity detection accuracy is improved.

The utility model relates to liquid viscosity detection technical field especially relates to a kinematic viscosity testing device, including sample cell subassembly and detection subassembly. Sample cell subassembly includes two detection inner boards, two detection inner boards articulate to have open state and closed state, under the closed state, two detection inner boards surround and form the capillary space along the vertical direction extension, and the liquid is in the capillary space and is in accord with capillary phenomenon when going down. Detection subassembly has the accommodation groove, and sample cell subassembly can insert or separate from the accommodation groove, and detection subassembly can detect the time difference of the liquid in the capillary space of sample cell subassembly in the accommodation groove when passing through different positions, and because the liquid is in accord with capillary phenomenon when going down, the distance between different positions and the time difference of the liquid passing through different positions can be measured to calculate the kinematic viscosity of the liquid. The kinematic viscosity testing device is simple to operate and can be carried. It is easy to clean after detection, and multiple detections can also ensure high operation efficiency.

The utility model discloses a homogenizing dispersion machine. The homogenizing dispersion machine comprises a base, a vertical bracket is arranged on one side of the base, a chuck is arranged at the upper end of the bracket, a support arm is arranged in the chuck, and one end of the support arm is connected with a dispersion host; the lower end of the dispersing main machine extends downwards to form a dispersing tool bit, and the dispersing tool bit extends into a container below the dispersing tool bit; a sealing cover is arranged at the upper end of the container, a vacuumizing pipe is connected to the sealing cover, and the other end of the vacuumizing pipe is connected with a vacuumizer. The container can be vacuumized by starting the vacuumizer to form a negative pressure or low pressure environment, so that the gas solubility of liquid is reduced, the viscosity of the liquid is reduced, and the stirring and homogenization of the liquid are facilitated.

The invention discloses an intelligent pressurization and decompression oil return control method and system for an air conditioner system, and relates to the technical field of air conditioner lubricating oil control. The method comprises the steps that grids are divided through oil pipe layout data, single-grid oil resistance is calculated, a resistance thermodynamic diagram is generated, and pressure partitions are dynamically adjusted; a valve distribution strategy is set according to the pressure partitions, valve circulation scores are obtained, and three valves with the highest valve circulation scores are selected as main oil return paths; setting an oil pressure dynamic adjusting algorithm, compensating oil pressure deviation by combining plateau pressure, and adjusting the rotating speed of a variable-frequency oil pump and the opening of an electric adjusting valve; and dynamically adjusting the subarea heating power of the trunk road according to the real-time irradiance and the pressure subarea. The method solves the problem that in the plateau or extreme low-temperature environment, the temperature fluctuates violently, and the oil viscosity rises, so that the decision of the oil return route of the air conditioner is wrong.

The invention relates to a specimen liquid extractor with a quantification function, and belongs to the technical field of medical instruments, the specimen liquid extractor comprises a main control module, a suction device, an anti-reflux protection device, a human-computer interaction interface and an extractor shell, the main control module comprises an MCU core controller, a lithium polymer battery and a miniature camera, and the lithium polymer battery supplies power to the MCU core controller and the micro camera. According to the sample liquid extractor, the problem that a traditional sample liquid extractor possibly loses efficacy due to the fact that liquid viscosity is too high or contains impurities when quantitative operation is conducted through a flow sensor is solved, image recognition is not affected by liquid physical characteristics by directly observing the liquid level height, and a better quantitative function is achieved; through image recognition, a probe or other quantitative sensors do not need to be inserted into liquid, the risk of cross contamination can be effectively avoided while automatic quantification is achieved, rapid quantitative and accurate extraction of the sample liquid can be effectively achieved, the risk of contamination in an operation is reduced, and the sterile requirement of an operating room is met.

The invention relates to a photoacoustic liquid viscosity detection device and method based on spectrum resolution, and belongs to the field of photoacoustic detection and liquid physical property analysis. The device comprises a solid-state laser, a collimating lens, a plane mirror, a plate-type semitransparent mirror, a microscope objective lens, a photodiode, a photoacoustic coupling cavity, a rectangular prism group, an ultrasonic transducer, a pre-signal amplifier, a digital oscilloscope and a computer. Pulse laser is focused to a liquid sample after being processed by an optical path to excite a photoacoustic effect, an ultrasonic transducer receives a signal and converts the signal into an electric signal, after a digital oscilloscope synchronously samples, a computer extracts a frequency spectrum full width at half maximum (FWHM) through fast Fourier transform, and non-contact detection is realized based on a negative correlation between the frequency spectrum full width at half maximum and viscosity. The method can overcome the defects of large sample size, mechanical contact and the like of a traditional method, and is suitable for high-precision viscosity detection of biological tissues and industrial samples in the field of biomedicine.

The application relates to a method for fracturing a fractured shale zone by using a pre-bridging body, and relates to the field of shale gas fracturing. The method comprises the following steps: establishing a shale fracture development degree judgment model, judging the natural fracture development degree of a target layer according to the shale fracture development degree judgment model; calculating different discharge wellhead pressure values according to well logging data interpretation and small pressure test data, and establishing a fractured shale zone body reconstruction construction pressure judgment standard; adopting a pre-bridging technology for construction in the early stage of fracturing implementation; and adjusting the discharge, liquid viscosity and in-joint bridging process parameters to realize reservoir reconstruction. The method for fracturing a fractured shale zone by using a pre-bridging body can help field engineers to judge the fracture development degree of a formation and evaluate whether fracturing reconstruction is effective, and on this basis, systematic pre-bridging technology and field construction control means are provided, so that the reconstruction effect of the fractured shale zone is effectively improved.

The invention provides a preparation method of an impact-resistant polyester composition, which is a continuous process and comprises the following steps. The recycled release film is smashed, compacted and dried, then melt extrusion and degassing are carried out, and the recycled release film contains recycled PET resin. And after filtering, tackifying by using a liquid tackifying system. Next, melting and mulling are carried out, modification extrusion is carried out through modifiers, the modifiers comprise an impact-resistant modifier, a compatilizer, an antioxidant and a lubricant, and after the rubber strip is subjected to water cooling, grain-sized dicing and dehydration are carried out, so that the impact-resistant polyester composition is prepared.

The invention discloses a semiconductor wafer CMP (chemical mechanical polishing) polishing machine capable of accurately spraying grinding liquid. The semiconductor wafer CMP polishing machine comprises a polishing machine shell horizontally placed on a working table. Through cooperation of the polishing assembly and the tool assembly, the semiconductor wafer can be conveniently, stably and efficiently polished, and the capability of polishing the semiconductor wafer is achieved; through the cooperation of a flow meter and a gear pump of the liquid conveying assembly, the output flow can be conveniently monitored, adjusted and controlled in real time, and the accurate manufacturability of the device is achieved; through a fluid mechanics and system efficiency model established by the grinding fluid regulation and control module, multiple factors such as gear pump volume efficiency, pipeline resistance, grinding fluid viscosity and temperature dependence are comprehensively considered, and accurate calculation and dynamic regulation of actual output quantity are achieved; the module not only can judge whether the supply is sufficient or not, but also can reversely deduce and adjust the ideal output quantity when the supply is insufficient, so that the supply accuracy of the grinding fluid and the process stability are remarkably improved, and the cost waste caused by excessive supply is reduced.

The invention discloses a liquid viscosity measuring method based on a phase-locked loop algorithm. Liquid flows in the guided wave resonance element, the excitation and receiving coil is arranged on the surface of the guided wave resonance element in an attached mode, a permanent magnet is arranged beside the excitation and receiving coil, the temperature control module is connected with the guided wave resonance element, and the current sampling resistor is connected with the excitation and receiving coil in series. Ultrasonic guided-wave vibration is generated in a guided-wave resonant element through an exciting coil, voltage and current response signals of the resonant element are synchronously acquired by using a dual-channel synchronous sampling module, an impedance real part of the resonant element is accurately extracted according to the response signals, and accurate measurement of the liquid viscosity is realized by combining an established impedance-viscosity relation model. According to the invention, not only are the limitations of complex equipment, high cost and high requirement on sample volume of the traditional viscosity measurement method overcome, but also the problems of poor measurement stability, complex device manufacturing and difficulty in realizing online real-time monitoring under the working condition of strong noise or high damping in the existing method are solved.

The invention discloses coating equipment and a coating method for an insulating coating of a ceramic aluminum foil tape, and the coating equipment comprises a first box body which is used for accommodating insulating paint liquid; the second box body is arranged above the first box body, a circulating pump is arranged in the first box body, and the circulating pump is used for pumping insulating paint liquid in the first box body into the second box body. Separable covering structures are introduced to the two sides of the ceramic aluminum foil tape, flow distribution of high-viscosity insulating paint in an edge area is effectively regulated and controlled on the premise that an original dip-coating process is not changed, the accumulation thickness of an edge coating is remarkably reduced, the overall coating uniformity is improved, and the service life of the ceramic aluminum foil tape is prolonged. According to the mode, the dependence of a traditional adjusting method on the viscosity or the production speed of the paint liquid is avoided, the adhesive force and the insulating property of the insulating paint are ensured, and relatively high production efficiency is maintained.

The invention relates to the technical field of college physics experiment devices, and discloses a liquid viscosity coefficient and surface tension coefficient measurement comprehensive experiment instrument, which comprises a test bed, a first square column container, a second square column container, a timing automatic release device, a force sensor, a metal circular ring, an industrial camera matched with a telecentric lens, a lifting platform and a host. According to the invention, two original experimental devices are combined into one, so that the cost is saved, and the laboratory space is also saved; by designing the timed automatic release device, manpower is saved, and errors caused by manual operation of an original experimental instrument can be reduced; and the instantaneous speed of the small ball on the falling path is measured by using a machine vision technology, so that the selection basis for selecting the constant-speed motion interval of the small ball can be explored.

The application belongs to the technical field of polymer synthesis, and particularly relates to a preparation method of a methacrylic acid polymer, which comprises the following steps: feeding polymerization monomers, a chain transfer agent and an initiator into a polymerization reactor, and performing a polymerization reaction in the polymerization reactor; the polymerization reaction temperature is 200-260 DEG C; the polymerization reactor is a loop reactor; there is no gas phase in the polymerization reactor; the flow rate of the reaction liquid in the polymerization reactor is 0.2-0.8 m / s; and the polymer concentration at the outlet of the polymerization reactor is 70-85 wt%. The loop reactor is used, a series of operation conditions are set, and a product with high polymerization conversion rate is obtained. By controlling the polymerization reaction temperature, the reaction liquid viscosity is effectively reduced, the occurrence probability of gel effect is reduced, the polymerization conversion rate is improved, and the polymer concentration at the outlet of the polymerization reactor is 70 wt%-85 wt%.

The application discloses an on-line glass liquid viscosity detection device for a bottle making machine. The bottle making machine comprises a mold and a gas snubbing head connected to the end of the mold. The viscosity detection device comprises a first detection member arranged at the bottom surface of the gas snubbing head. The gas snubbing head is adapted to fill a certain amount of gas into the inner cavity of the mold to form a positive pressure in the inner cavity of the mold. The first detection member is adapted to detect the pressure value in the inner cavity of the mold and determine the viscosity of the glass liquid according to the pressure value in the inner cavity of the mold after a threshold time. While the gas snubbing head snubs gas into the mold, the first detection member can detect the pressure value in the inner cavity of the mold. By judging the size of the detected pressure value after the threshold time, the viscosity of the glass liquid can be obtained. Compared with the prior art, the application combines the manufacturing process of glass bottles, realizes on-line viscosity detection of the glass liquid, and thus improves the production rate and quality of the bottle body.