20 results about "Particle loss" patented technology

The present invention discloses an obstruction-type particle receiver, comprising a feed port, a cooler, a multi-stage baffle, a light-transmitting port, a discharge port and a particle temperature dynamic control device. The interior of the receiver box is a particle falling area, and the exterior of the box is a cooling medium channel. The particle temperature dynamic control device comprises a particle flow regulator, a light intensity sensor, a particle curtain transmittance sensor and a temperature sensor. The multi-stage baffle is composed of at least two stages of baffles arranged in a vertical direction, and each stage of baffle is composed of a telescopic baffle, a connecting rod hinge, a baffle, a cooling pipe and a telescopic rod. The baffle is composed of an arc plate, a baffle and a guide member. The present invention is applied to the field of solar high-temperature heat recovery. The particles in the receiver have a long residence time, small particle loss, a stable particle curtain, easy-to-adjust particle flow, and dynamically and accurately controllable particle outlet temperature. It can adapt to different light intensities, and the waste heat of the high-temperature backplane is easy to recover. The overall thermal efficiency is high and the robustness is strong.

The invention provides a polyarylether polymer as well as a preparation method and application thereof, and belongs to the technical field of ultrafiltration membrane preparation. The polyarylether polymer provided by the invention has a structure as shown in a formula I which is described in the specification. Uniformly mixing the polyarylether polymer, a pore-foaming agent and an organic solvent 1, and carrying out vacuum defoaming to obtain a membrane casting solution; and coating the surface of a base material with the membrane casting solution, and then immersing the base material in water for phase inversion to obtain the ultrafiltration membrane. According to the preparation method, the hydroxyl-containing functional natural-source nano material is grafted with amino acid, finally, the modified polymer is prepared through nucleophilic reaction, and the ultrafiltration membrane prepared from the polymer solves the problems of particle loss and environmental pollution in traditional blending modification. The ultrafiltration membrane prepared by modifying the polymer body has relatively high pure water flux and flux recovery rate.

This invention discloses a model test apparatus and method for simulating seepage failure of earth dams or embankments under water level fluctuations. The apparatus includes an environmental simulation system, a process monitoring system, and a particle collection system. The environmental simulation system includes a tank, an earth dam or embankment model, a water level regulation simulation component, and a warm air control component. The process monitoring system includes a camera recording instrument and a multivariable monitoring component. The particle collection system includes a soil-water collection container and a soil-water separator. The soil-water separator includes a sedimentation tank and multiple screens with different apertures connected sequentially to the sedimentation tank. This invention can simulate the entire process of soil seepage deformation and failure under complex environmental changes such as water level fluctuations and wind and sun exposure. It can compensate for the lack of a precise device for quantifying lost particles in current seepage model tests, and can grasp the particle loss situation at each stage of the process. The apparatus has a high degree of development potential, and the operation procedure is clearly defined.

This application discloses a two-stage virtual impactor for sorting submicron particles, belonging to the field of aerosol separation. The virtual impactor includes a housing and a first-stage and a second-stage virtual impactor disposed within the housing. Both the first-stage and second-stage virtual impactors are arranged parallel to each other along the length of the housing. A deflection channel is also provided within the housing. One outlet of the first-stage virtual impactor is connected to the inlet of the second-stage virtual impactor through the deflection channel. This virtual impactor, through staged processing, optimizes design parameters for each stage within a specific particle size range, resulting in a more uniform particle group and reducing the probability of non-target impacts on the wall due to mixing. This design systematically reduces particle losses caused by inertial impaction, turbulent entrainment, and other mechanisms, enabling it to better adapt to low-concentration, high-precision particle separation, significantly improving separation efficiency and data reliability.

The utility model relates to the technical field, in particular to a particle-loss-preventing dewatering well structure adjacent to an existing station, which comprises an existing tunnel and a newly-built foundation pit above the existing tunnel, and is characterized in that a dewatering well body is excavated around the existing tunnel and the newly-built foundation pit, a permeable pipe is arranged in the dewatering well body, and the permeable pipe is communicated with the existing tunnel and the newly-built foundation pit. Gravel, fine sand and sponge are filled between the dewatering well body and the permeable pipe, and a dewatering well limiting assembly is arranged at the top of the dewatering well body. In the process of dewatering underground water on the dewatering well body through the permeable pipe, a multi-stage inverted filter structure formed by the gravel, the fine sand and the sponge is adopted, so that sand particles are prevented from being lost along with water flow, the piping phenomenon is effectively prevented, and the safety and the stability of an existing tunnel are protected.

This disclosure relates to a ternary material precursor preparation system. The system includes a cylindrical reaction apparatus with a filtration assembly. The filtration assembly includes a first set of filter tubes, comprising multiple filter tubes arranged radially. The multiple sets of first filter tubes are arranged at circumferential intervals. This system allows for simultaneous precursor co-precipitation and material concentration within the reaction apparatus, avoiding particle loss and the generation of substandard products from secondary growth, thus improving the quality of the ternary precursor material product.

This invention provides a pipeline flow field tracer particle injection system and method for use in gas transmission pipelines. The system includes: a particle injection unit, a laser emission unit, and an image acquisition unit. The pipeline is divided into an injection zone and an emission / acquisition zone according to the particle's direction of travel. The particle injection unit is located in the injection zone and is used to inject tracer particles into the pipeline. The laser emission unit and image acquisition unit are located in the emission / acquisition zone and are respectively used to emit laser light into the detection zone within the pipeline and to acquire particle images of the detection zone. A control unit, connected to the particle injection unit and the image acquisition unit, is used to obtain the effective sampling number of tracer particles based on the particle images and to adjust the particle injection volume within the pipeline according to the effective sampling number. The pipeline flow field tracer particle injection system of this invention has a simple structure, can quickly and accurately adjust the particle injection volume, reduce particle loss, improve experimental efficiency, and enhance the accuracy and safety of the tracer particle injection process.

The invention provides a screening and conveying device and method for ultrafine particles, and the device comprises a charge screening module which is used for carrying out the target particle size and charge screening of entering aerosol particles; the aerodynamic lens is used for focusing the screened charged particles and forming particle beams; the cooling bunching module comprises a radio frequency multi-pole rod and is used for cooling the charged particles in the transmission process and keeping the charged particles in an axial area; the differential transmission module comprises a radio frequency multi-pole rod, is arranged between the cooling bunching device and the trapping device, and is used for realizing air pressure transition and further constraining particles; and the trapping module comprises a linear ion trap and is used for trapping the charged particles. According to the invention, the particle loss of particles in the transmission process is effectively reduced, and the transmission efficiency and trapping rate of the particles are improved.

The invention discloses a novel fine grain loss collecting and measuring device and a testing method, and belongs to the field of civil engineering and hydraulic engineering, the device comprises two sets of vertical rising precipitation devices and a flocculation water storage device, the device is designed according to the particle critical suspension flow velocity principle, coarse and fine grain grading separation is achieved through an obliquely-arranged double-layer detachable filter screen (0.25 mm + 0.075 mm), and the fine grain loss collecting and measuring device is designed according to the particle critical suspension flow velocity principle. The content of fine particles is monitored in real time in cooperation with a turbidity meter; test water is preliminarily precipitated by the vertical rising precipitation device and then enters the flocculation water storage device to fully react with 0.2%-0.5% polyaluminum chloride flocculant, deep purification is realized, and the purified water is supplied to the test again through the water supply pipe to form closed-loop circulation. According to the invention, a dual-system alternate working mode is adopted, non-stop continuous determination of the test is realized, and the test efficiency is improved by more than 30%; the fine grain loss determination adopts turbidity meter real-time monitoring and drying and weighing dual verification, and the error is less than or equal to 5%; the utilization rate of test water reaches 90% or above, and the problems that in the prior art, measurement deviation is large, water is wasted, and shutdown detection is needed are solved.

The present application belongs to the technical field of asphalt material, and particularly relates to an epoxy asphalt and a preparation method and application thereof. The epoxy asphalt is prepared from raw materials including the following components by weight: 20-30 parts of epoxy resin, 10-20 parts of curing agent, 5-10 parts of toughening agent, 3-8 parts of diluent, 30-60 parts of base asphalt, 10-20 parts of rubber powder and 0.1-1 part of activator. The epoxy asphalt material has high strength and good toughness, and guarantees that a novel large-void drainage asphalt mixture (void ratio greater than 25%) using the epoxy asphalt has significantly improved high-temperature stability, anti-flying performance and other performances, and reduces the occurrence of rutting and particle loss and other diseases.

The application provides a cyclotron electrostatic deflection plate beam loss heat source reconstruction method, and relates to the technical field of particle accelerator heat analysis and multi-physical field coupling calculation, and the method comprises the following steps: step 1, configuring beam dynamics simulation parameters, performing multi-particle tracking under a three-dimensional field diagram containing a central area electromagnetic field, a harmonic coil magnetic field and an electrostatic deflection electric field, and generating a particle loss list; step 2, converting the particle loss list into a beam source file of a Monte Carlo radiation transport program, configuring Monte Carlo parameters, including deflection plate materials, boundaries, particle types and energy spectra, performing particle transport simulation, and obtaining a three-dimensional energy deposition matrix on the electrostatic deflection plate element. The application realizes high-resolution heat source reconstruction, can reduce the calculation error of the peak temperature rise of the deflection plate, and can feed back the temperature field solving result to optimize the particle source, thereby providing a reliable basis for the thermal structure design and cooling optimization of the electrostatic deflection plate.

The invention provides a steady-state quantum turbulence generation method and a steady-state quantum turbulence generation system capable of guaranteeing particle number conservation. The method comprises the following steps: constructing an evolution model of the quantum fluid system, wherein the evolution model is obtained by introducing an external driving item and a particle number conservation dissipation item based on a Gross-Pitaevskii equation; the external driving item is an additional external potential of spatio-temporal variation and is used for injecting energy into the system; the particle number conservation dissipation item depends on the time change rate of the particle number density and is used for dissipating the energy of the system; the external driving item and the particle number conservation dissipation item are configured to keep the total particle number conservation of the system; and performing time evolution on the quantum fluid system based on the evolution model until the system reaches a steady-state quantum turbulence state of total kinetic energy dynamic balance. According to the method, the loss of chemical potential compensation particles does not need to be adjusted, quantum turbulence structures of different scales can be stably generated and regulated, and the physical self-consistency and long-term stability of the quantum fluid evolution process are guaranteed.

The present invention relates to a small hybrid condensation particle counter and its working method. The condensation particle counter includes a particle adjustment unit, a hot steam saturation unit, a particle and steam mixing unit, a particle growth unit, an optical detection unit, and a signal processing and control unit. After the ultrafine particles to be measured pass through the particle adjustment unit that adjusts the flow rate and reduces the temperature, they are fully mixed with the alcohol vapor flowing into the hot steam saturation unit in the particle and steam mixing unit. Then, they absorb moisture in the particle growth unit and grow to an optically detectable size. The optical detection unit converts the measured particle diameter into a light pulse signal, thereby obtaining the number concentration of the ultrafine particles to be measured. The present invention has the advantages of fast and sufficient mixing of particles and hot steam, and low particle loss. While being able to reduce the size of the equipment and achieve portability, it has good performance in dynamic detection, high flow rate operation, and capturing extremely small particle sizes.

The invention discloses a sediment particle size analysis screen analysis method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a first particle size of first sieved powder; determining at least one screen size according to the first particle size, and determining at least one first mass; performing vibration screening on the first screened powder according to a screen mesh, and weighing to obtain second mass; a first mass fraction is determined from the at least one first mass and the second mass. According to the method, the screen is selected according to the first particle size, the first screened powder is weighed according to the selected screen, and the mass fractions of the particles with different particle sizes in the sediment are determined according to the obtained mass, so that automatic weighing can be realized, and meanwhile, due to direct weighing, the particles do not need to be replaced by a weighing tray, and the weighing efficiency is improved. The problem of particle loss generated in the weighing process is avoided, and accurate data basis and higher test efficiency are provided for content analysis of sediments while the accuracy of quality acquisition is improved.

The utility model discloses a negative pressure suction flattening structure of a cleanliness particle detection filter membrane, and relates to the technical field of cleanliness particle detection. The utility model comprises a cylindrical mounting seat, a plurality of clamping blocks and a plurality of clamping blocks, the negative pressure cavity is formed in the mounting base, a clamping groove is formed in the mounting base, a placing plate is connected to the clamping groove in a clamping mode, and a plurality of through holes are formed in the placing plate in an array distribution mode; and the sealing ring is placed at the top of the placing plate. When the inside of the negative pressure cavity is pumped into a negative pressure state through the negative pressure source, the filter membrane is adsorbed on the placing plate, and due to the flatness of the placing plate and the existence of the through holes, the filter membrane is uniformly adsorbed, so that the deformation and warping of the filter membrane are avoided; the problems of particle morphology change, particle loss and incapability of identifying particle metal characteristics through polarized light possibly caused by using glass or transparent acrylic to flatten the filter membrane are avoided, and the accuracy and reliability of detection are improved.

The invention belongs to the technical field of geotechnical engineering, and discloses a sand infiltration particle loss discrete element simulation method and device, and the method comprises the steps: obtaining preset control parameters and sand sample particle data under an initial static shear condition; screening the sand sample particle data according to preset control parameters to obtain to-be-removed particle data; calculating to-be-removed particle data according to a particle removal algorithm based on multi-level priority ranking to obtain a simulation data packet and a removal priority of each particle; determining lost particles according to the target loss rate and each removal priority; updating the particle loss mass and the to-be-removed particle data according to the particle data of the lost particles; judging whether the particle loss mass is greater than or equal to the target loss mass; and if yes, establishing a particle loss model according to the simulation data packet, and obtaining microstructure parameters and macromechanical property data according to the particle loss model. The method can accurately identify and control the loss process of the fine particles in the gaps of the sand skeleton.

The invention discloses a grinding fluid supply device, and relates to the technical field of grinding equipment. The device comprises a frame body, wherein a liquid inlet pipe is mounted on the frame body; according to the technical scheme, a separation-detection-supplement closed-loop system is constructed, harmful chippings in the grinding fluid are efficiently removed, more importantly, real-time monitoring and accurate supplement of abrasive particle loss in the grinding fluid are achieved, and compared with a traditional scheme that the whole groove of grinding fluid has to be frequently replaced due to abrasive exhaustion, the grinding fluid is more accurate in detection and supplement. According to the device, a base liquid carrier of basic grinding liquid can be utilized to the maximum extent, the function of the device can be recovered only by supplementing a relatively small amount of concentrated grinding materials, the problem that a traditional device can only filter chippings and cannot supplement consumed core grinding materials is solved, it can be ensured that circulating grinding liquid always maintains the grinding material concentration meeting the technological requirement, and the grinding efficiency is improved. Therefore, remarkable and multi-aspect comprehensive benefits are brought in the aspects of guaranteeing the machining quality stability, reducing the production cost, improving the automation level and the like.

The invention discloses a gravel soil side slope hydraulic erosion test device and method. The device comprises a model water tank, a side slope model arranged in the model water tank, a water supply assembly connected with the model water tank and a monitoring assembly arranged outside the model water tank. The device is reasonable in structural design and stable and reliable in operation, and through multi-scale tests and numerical simulation, a positive feedback mechanism that fine particle loss drives pore structure recombination, induces skeleton instability and accelerates fine particle loss due to skeleton damage in the seepage erosion process of the slope model is disclosed. The progressive degradation rule and the collapse instability mechanism of the gravelly soil side slope under the action of seepage erosion are further clarified, a new theoretical framework is provided for understanding the collapse instability of the side slope, and the cognitive direction of monitoring and early warning research on the instability of the gravelly soil side slope is expanded.

The nanoparticle tracking and predicting method is used for tracking and predicting nanoparticles, and at least comprises particle detection, trajectory tracking, a physical prediction model, visualization and data recording. The method comprises at least the following steps: processing a video frame by means of the particle detection, identifying valid nanoparticles and acquiring particle information thereof, generating a unique identifier (ID) based on initial position information of the valid nanoparticles; according to any same ID and different moments, needed particle motion parameters are obtained through trajectory tracking real-time calculation; when the effective nanoparticles at different moments of the same ID are continuously captured, continuing to capture; when capturing the interruption, predicting the particle information through the physical prediction model to compensate and track the interruption, and returning; the effective nano particles are continuously tracked through trajectory tracking, and the particle information and the particle motion parameters are displayed in the visualization in real time; and storing the particle motion parameters in real time by the data record. According to the method, the problems of track breakage, physical rule modeling deficiency and insufficient multi-module collaboration caused by particle loss in a complex environment in the prior art are solved.

This invention relates to an apparatus, method, and application for determining the cumulative mass of lost particles in wide-graded soil. The apparatus of this invention includes: a sample model cylinder, a hydraulic control system, a static and dynamic loading system, a data detection and acquisition system, a particle collection system, and a computer for monitoring and acquiring changes in pressure and pore water pressure experienced by the sample during the test. This specialized apparatus for permeability stability testing can conduct model tests simulating particle loss phenomena in model roadbeds under various combinations of static and dynamic loads, soil properties, and moisture conditions. It can simulate different magnitudes, frequencies, and forms of static and dynamic loads, and test soil samples with various particle sizes, gradations, densities, and saturations.