44 results about "Particle injection" patented technology

The invention discloses a CFD (computational fluid dynamics)-based TBM (tunnel boring machine) wet spraying primary lining constructability optimization method, and belongs to the technical field of tunnel construction. The method comprises the following steps: constructing a CFD geometric model comprising a jet nozzle, a tunnel ring surface and a closed computational domain, setting a multiphase flow model, viscosity parameters and a dynamic particle jet source, and simulating a concrete jet deposition process; representing partial liquid state behavior of sprayed concrete deposited on the wall surface based on the wall surface liquid film thickness, correcting a simulation result by synthesizing a scale factor after representing the actual spraying layer thickness, and introducing the scale factor to correct a simulation deviation; and the spraying angle, the spraying speed and the accelerator mixing amount are optimized in combination with the correction result, and optimal process parameters are generated and transmitted to a TBM control system to be executed. According to the method, physical experiments are replaced by virtual simulation, construction process visualization and result prediction are achieved, and the method is good in universality, high in simulation efficiency and suitable for efficient construction of the primary lining.

The invention discloses a high-sulfur-content natural gas elbow sulfur particle deposition simulation experiment device and a testing method, and relates to the technical field of high-sulfur-content natural gas gathering and transportation pipeline sulfur particle dynamic deposition. The sulfur particle deposition simulation experiment device for the high-sulfur-content natural gas pipeline can simulate the dynamic deposition process of sulfur particles under various working conditions such as different flow rates of the sulfur particles, different flow rates of gas, different particle sizes of the sulfur particles, different pipeline pressures, different pipe bending angles and different pipe bending materials; through the two-stage recovery and two-stage purification scheme of the activated carbon adsorption device, the cloth bag dust collector and the secondary filter screen, the sulfur particle recovery rate is highly reliable, and the danger to the environment and testers is remarkably reduced; and through the coupling design of the micro vibrator and the sulfur particle injection device, the problem of blockage caused by sulfur particle agglomeration is effectively solved, and the manual intervention frequency is reduced.

The invention relates to the field of numerical simulation, in particular to a porous ceramic model reconstruction and filtering performance simulation method, which comprises the following steps of: S1, obtaining internal structure image data of a ceramic material through micro-CT (Computed Tomography) scanning with micron-level resolution, and reconstructing a real three-dimensional microstructure of the ceramic material; s2, performing REV extraction and dynamic processing on the three-dimensional geometric model generated in the S1; s3, establishing a flow field model on the CFD, and setting corresponding boundary conditions; s4, the DPM is started, a particle injection source is configured, and particle physical parameters are set; s5, bidirectional coupling solution is executed, and high-precision particle motion and deposition process simulation is achieved; and S6, extracting simulation result data, and if the difference between the simulation result and the reference value exceeds a preset threshold value, returning to S4 and / or S5 to carry out parameter adjustment and model correction. According to the method, effective prediction of the particles in the porous structure can be realized.

The invention discloses a particle injection molding machine for plastic recycling, and belongs to the technical field of plastic injection molding machines, the particle injection molding machine for plastic recycling comprises an injection molding machine body, the injection molding machine body comprises a conveying pipe, a feeding port, a spiral conveying roller, a right mold, an electric push rod, a sliding plate, a limiting rod, a left mold, a discharging port and a mixing mechanism arranged on the outer wall of the feeding port; a conveying pipe is fixedly connected to the outer wall of the injection molding machine body, a feeding opening is formed in the outer wall of the conveying pipe, and by arranging a heating box, when plastic raw materials are produced and processed through a control box, the heating and mixing effects of plastic in the control box are improved, and the efficient injection molding effect of the plastic in the injection molding machine is improved; the electric heating wire can be turned on, and the electric fan is turned on, so that heat generated by the electric heating wire is conveyed into the control box from the second air supply outlet, and the effect of fully preheating the raw materials stirred in the control box is achieved.

The invention discloses a grid-control superconducting nanowire low-temperature thermometer and a preparation method thereof, and relates to the technical field of superconducting electronics and low-temperature detection. Comprising a substrate and a superconducting layer, and the superconducting layer comprises a grid electrode, a superconducting nanowire and an inductor; the grid electrode is vertical to the superconductive nanowire, has a distance from the superconductive nanowire and is used for electric field regulation and control; the superconducting nanowire is connected with the inductor and is used for responding to particles injected into the grid electrode and outputting a pulse signal; the inductor is connected with the superconducting nanowire and is used for inhibiting a latch-up effect under high bias current; the superconducting layer material is a superconducting thin film material with a superconducting transition temperature Tc exceeding a measurement temperature zone; according to the invention, (quasi) particle injection in the critical current process of the superconducting nanowire is regulated and controlled through the grid electric field, high-precision measurement of the low temperature is realized in combination with nonlinear response of the pulse counting rate and the temperature, and the device and the method have the advantages of wide temperature zone measurement, low noise, high sensitivity, low power consumption, small self-heating, simple measurement system and low cost.

The utility model provides a fat particle pushing and injecting assembly, and relates to the technical field of fat particle pushing and injecting, the fat particle pushing and injecting assembly comprises a pushing and injecting mechanism, a protection mechanism is arranged on the outer surface of the pushing and injecting mechanism, the protection mechanism comprises a connecting piece arranged on the outer surface of the pushing and injecting mechanism, and the connecting piece is connected with two protection plates. The protection mechanism is arranged on the injection mechanism, the needle head and the protection tube are effectively protected, accidental injuries caused in the preparation stage before transportation, storage and operation are avoided, meanwhile, the pollution risk is reduced, and the operation safety is improved.

To address the technical problem in existing techniques where tracer particles, when used to measure gas flow velocity and flow field changes in a natural gas pipeline, interfere with the stability of the natural gas flow field within the pipeline, resulting in decreased accuracy or even measurement failure, an embodiment of the present invention provides a natural gas pipeline flow field tracer particle injection device and injection method, comprising: a injection unit, the ends of which are connected to an upstream natural gas pipeline and a downstream natural gas pipeline, respectively; a plurality of tube bundles disposed within the injection unit for connecting the upstream and downstream natural gas pipelines; and a tracer particle generator for communicating with each tube bundle to simultaneously inject tracer particles into each of the tube bundles. This embodiment of the present invention reduces the range of disturbances in the downstream flow field caused by tracer injection, allowing the entire flow field to quickly stabilize, resulting in a more uniform concentration distribution of tracer particles in the pipeline and more accurate measurement results.

This application provides a simulation system and method for the AC characteristics of vacuum diodes based on a physical information neural network, belonging to the field of numerical simulation technology for electronic devices. The system includes a particle injection module, a particle deposition module, a Poisson equation solving module, an electric field calculation module, and a particle propulsion module. The particle injection module continuously injects electron particles; the particle deposition module maps particle information to a grid and calculates the electron density; the Poisson equation solving module uses a physical information neural network method to solve for the potential distribution based on the electron density; the electric field calculation module obtains the spatial electric field; and the particle propulsion module updates the particle velocity and position, forming a self-consistent coupled simulation. This application achieves continuous and smooth potential solutions through hard constraint embedding of boundary conditions, two-stage optimization, and loss scale adjustment mechanisms, reducing grid dependence and improving computational accuracy and efficiency. It is suitable for numerical simulation of vacuum electronic devices, electron beam systems, and space charge transport problems.

Systems and methods are provided for locating hydrocarbons near a wellbore, determining petrochemical properties of a reservoir, and assessing hydrocarbon saturation between reservoirs. The nanoparticles can be positively charged and have properties that make them explode upon contacting crude oil. Sensors can be strategically placed near the wellbore to measure micro tremors caused by nanoparticle explosions. When the fluid is pumped into the wellbore, the fluid is forced into the surrounding rock formations. The fluid can contact crude oil in the rock formations, and the nanoparticles can attract to the fluid / oil interface due to negatively charged particles in the crude oil. When the nanoparticles reach the fluid / oil interface, they can contact the crude oil and explode. The seismic sensors can detect micro tremors caused by the nanoparticle explosions. The seismic sensor readings can be superimposed to identify the location of the crude oil and assess hydrocarbon saturation.

The utility model provides a fat layer particle injection device, and relates to the technical field of fat layer particle injection, the fat layer particle injection device comprises a supporting seat, the top of the supporting seat is provided with a limiting groove, a needle cylinder is placed in the limiting groove, a piston rod is arranged in the needle cylinder, the piston rod is provided with a connecting piece, the connecting piece is connected with a sliding sleeve, and the supporting seat is also provided with a contact switch. And the contact switch is arranged on the moving track of the sliding sleeve, so that the contact switch is triggered when the sliding sleeve moves. By means of the sliding sleeve and the contact switch, the piston rod can drive the sliding sleeve to move in the moving process, the sliding sleeve can trigger the contact switch in the moving process, in other words, when the preset injection amount is reached, the contact switch is triggered, medical workers are reminded to stop injection, and therefore the accuracy of the injection amount is ensured.

The invention discloses a laboratory B-PPG gel particle injection system and method, and relates to the technical field of oil field development physical simulation experiments. According to the technical scheme, the polymer mother liquor containing B-PPG gel particles can be in a rotating state in the injection process, the suspension time of the B-PPG gel particles is prolonged, the integrity of the B-PPG gel particles is kept, and therefore the effect of an indoor B-PPG gel particle development effect simulation experiment is improved. The system comprises a pressure source, a valve and a B-PPG gel particle injection device, two ends of the valve are respectively communicated with a pressure source and an injection device; the injection device comprises a shell, a rotary piston container, a driving motor, a gear mechanism and a control unit; the rotary piston container is positioned on the side of the shell; the driving motor and the gear mechanism are arranged in the shell; the driving motor is connected with the rotary piston container through a gear mechanism; the control unit is in communication connection with the driving motor; the control unit can control the driving motor to alternately rotate forwards and backwards within a preset time range. The invention further provides an injection method based on the injection system.

The invention belongs to the technical field of petroleum drilling equipment, and particularly relates to a particle injection device for petroleum drilling, which comprises particle tanks, and the particle tanks are double tanks which can be alternately used and are connected in parallel; an outlet pipeline is installed at the lower end of the particle tank, an adjusting pipe and an injection pipe are sequentially installed on the outlet pipeline, a nozzle pipe and a mixing pipe are installed at the two ends of the injection pipe respectively, and the mixing pipe is connected to a main manifold; a spiral plate is mounted in the mixing pipe; a control hose is installed in the adjusting pipe, a control pipe is installed on the adjusting pipe, the control pipe is communicated between the control hose and the inner wall of the adjusting pipe, and the control pipe is connected with an external hydraulic pump. The device is simple in structure, particles in the tank body can be impacted and stirred to prevent the particles from blocking an outlet, meanwhile, the particles are stirred to enable the particles and drilling fluid to be evenly mixed, meanwhile, the particle injection amount is continuously controlled and adjusted, and the concentration of the injected particles is changed.

The invention discloses a biochar particle injection combustion system for a ship boiler. A fuel preparation unit is used for preparing biochar particles from a biochar material; the fuel storage unit maintains the oxygen concentration in a storage bin to be lower than 3% through inert gas so as to ensure safety; the fuel feeding unit is used for forming the biochar particles into fuel and conveying the fuel into the injection unit; the injection unit injects fuel into the combustion and energy conversion unit, and is provided with a pressure monitoring and pressure relief loop to stabilize the safe operation of the system; the combustion and energy conversion unit comprises a combustor used for receiving fuel and feeding the fuel into the boiler through a combustor nozzle for combustion, heat released by combustion is absorbed by the heating surface of the boiler to generate steam for heat supply, and the pressure of the hearth is maintained within a safe range by adjusting the secondary air volume or starting a pressure relief outlet; fly ash enters an ash bin for centralized treatment after electrostatic dust collection is conducted on boiler flue gas, purified flue gas is sucked by an induced draft fan and subjected to tail gas treatment to be discharged after reaching the standard, and efficient and environment-friendly operation is achieved.

The utility model provides a lipid layer particle injection device which comprises an injection mechanism, the injection mechanism comprises a needle cylinder main body, a wing plate is installed on the needle cylinder main body, a piston main body is arranged in the needle cylinder main body, the piston main body is connected with a piston rod, and one end of the piston rod penetrates out of the needle cylinder main body and is fixedly connected with a push disc. A driving mechanism is arranged on the outer surface of the needle cylinder body and comprises a first U-shaped fixing base and a second U-shaped fixing base which are arranged on the outer surface of the needle cylinder body, the wing plate is clamped between the second U-shaped fixing base and the first U-shaped fixing base, and a connecting piece is arranged between the second U-shaped fixing base and the first U-shaped fixing base. And a driving part is arranged between the first U-shaped fixing seat and the push disc. Through the arranged driving mechanism, the driving part in the driving mechanism can drive the piston main body to move through the push disc and the piston rod, that is, electric driving is adopted, the injection speed and depth can be accurately controlled through electric driving, and personal errors are reduced.

The invention belongs to the technical field of data processing, and relates to a neutron generator operation state monitoring method and system based on digital twinning. The method comprises the following steps: acquiring real-time operation electrical parameters to construct a virtual twinborn body; inverting the effective deuterium and tritium atom concentration in the target film in real time by using a physical difference equation containing a particle injection item and a thermal diffusion loss item; a beam spot drift correction factor is determined by calculating the difference between the real-time impedance of the neutron tube and the nominal design impedance, the beam spot area of the virtual twin is dynamically corrected, and the problem of prediction model failure caused by electrode ablation is solved; and finally, on the basis of the corrected state parameters, using a multi-parameter product model to predict the neutron yield and perform health degree diagnosis. Transparent monitoring of the internal state of the neutron tube is achieved, the problem of model distortion caused by beam spot drift is effectively solved, and the prediction precision of the whole life cycle is improved.

The application discloses a single particle injection method and a single particle injection device, and relates to the field of storage. The single particle injection method is suitable for the single particle injection device. The single particle injection device structure comprises a host and at least one single particle injection device. The host receives a starting instruction, and transmits the starting instruction to the single particle injection device. In response to the starting instruction, the at least one single particle injection device generates a field effect, and transmits the field effect to a receiving target. In response to the field effect, the potential state of the receiving target is changed. It can be seen that the embodiment of the application provides a single particle injection method and a single particle injection device. The single particle injection device releases and transmits a field effect to the receiving target. The field effect induces the change of the potential state of the semiconductor device of the receiving target. Moreover, the release, intensity and period of the field effect can be controlled according to requirements, so that artificial single particle injection is realized.

The system for capturing target condensed gas includes a supersonic condensation nozzle configured to receive a gas flow having a predetermined target condensed gas content and for accelerating the gas into a supersonic gas flow; at least one particle injection device within the supersonic nozzle for injecting particles into the supersonic gas flow, whereby target gas condensate is formed on some of the particles; an expansion device that generates an expansion wave in the flow of particles containing the target gas condensate, defining a conduit with a convex corner that separates the flow into a first flow path having particles with a high concentration of target gas condensate and a second flow path of gas with a lower target condensed gas content; and a flow divider having at least the first conduit, the flow divider configured to receive the first flow path.

The invention discloses a method and system for optimizing two-dimensional argon plasma uniformity by introducing a high-energy particle source, and the method comprises the steps: S1, filling a plasma reaction chamber with background gas, and simulating the distribution of neutral particles; s2, initializing the speed and the position of charged particles in the gas in the chamber, enabling the charged particles to be uniformly distributed in the chamber, and determining the intensity, the time sequence, the incident direction and the incident position of high-energy particles emitted by an external particle source; s3, calculation of charged particle density, potential and electric field; s4, calculating the force acting on the charged particles; s5, moving the charged particles; s6, checking and executing collision; and S7, repeating the steps S3 to S6, adjusting the high-energy particle injection time sequence until a steady state is reached, and obtaining the data distribution of the charged particles. Through controllable interaction between an external particle source and plasma or background gas, seed electrons-ions are actively generated in a specific space area or energy distribution is changed, and inherent space non-uniformity of the plasma is compensated.

The invention relates to the technical field of mineral flotation, in particular to a collision probability and desorption probability integrated measuring device suitable for mineral flotation. The device comprises a lower straight pipe, the lower portion of the lower straight pipe is sequentially connected with a bubble generation assembly and a particle injection assembly from bottom to top, the top end of the lower straight pipe is communicated with the bottom of a turbulence box, an inner cavity of the turbulence box is of a two-section structure with the wide lower portion and the narrow upper portion, and a bubble overflow channel and a turbulence area are formed by the narrow portion and the wide section of the inner cavity of the turbulence box respectively. A feeding pipe with an outlet extending to the turbulent flow area and a turbulent flow assembly with a power part extending to the turbulent flow area are mounted on the turbulent flow box. A physical carrier is provided for integrally obtaining the adhesion efficiency after collision of bubbles and particles and the desorption efficiency after adhesion, and the method has important significance in selecting a proper turbulence environment to strengthen collision of fine target mineral particles, reducing desorption of coarse target minerals and further improving the flotation recovery rate.

The application discloses a kind of GIS switch shell inner wall particle injection polishing device, belong to fluid polishing technical field.The application includes support, polishing chamber, feeding robot, several switches to be polished shell, abrasive pool, magnetic filter, air pump, the automatic sliding door is arranged on the polishing chamber, the feeding robot is located in the side of polishing chamber, the device includes barrel seat, the barrel seat is installed on support, the polishing chamber is arranged on barrel seat, the clamping mechanism is arranged on the polishing chamber, the polishing mechanism is arranged in the barrel seat, the air inlet pipe and the discharge pipe are connected on the polishing mechanism, one end of the air inlet pipe is connected with the air supply end of air pump, the middle part of air inlet pipe is provided with siphon, one end of the discharge pipe and siphon is inserted into abrasive pool, the application is lifted by inner thread sleeve driving lifting platform, simultaneously using displacement wheel to let air injection pipe move, realize that air injection pipe is flexibly switched between inside and outside of switch shell and carries out injection polishing.

The present invention generally relates to the field of conformance control in oil fields, particularly to a re-crosslinkable preformed particle gel system, and composition thereof. The composition of the re-crosslinkable preformed particle gel system contains monomers, crosslinkers, a polymer matrix, and additives. Components in the composition for re-crosslinkable preformed particle gel in the present invention have excellent compatibility with each other, and the obtained gel has excellent long term high-temperature resistance property. Different from prior products, in the re-crosslinkable preformed particle gel compositions according to embodiments of the present invention, the components that are used to re-crosslink the particle gels may be grafted on the polymer chain and will act as initiator or secondary crosslinker in different conditions. During particle injection process, all compositions would move together, thereby avoiding chromatographic problems typical of prior products.

The application relates to a drag-reducing particle screening device and method based on a natural gas pipeline, and particularly relates to the technical field of gas drag reduction, which comprises an optical window short section arranged on the natural gas pipeline; the optical window short section is provided with a pulse laser and a high-speed CCD camera; a drag-reducing particle injection end is arranged at the upstream of the optical window short section, and a drag-reducing particle recovery end is arranged at the downstream of the optical window short section, taking the flowing direction of the natural gas as the reference; the pulse laser and the high-speed CCD camera are connected through a laser controller and a synchronization controller; and the high-speed CCD camera is connected with a data processing unit. The drag-reducing particle screening device provided by the application uses the active high-pressure natural gas pipeline as a real working condition test platform, carries out micro-particle gas-solid two-phase drag reduction test, and realizes efficient, reliable and rapid screening and test of micro-particle materials and key technical parameters under real working conditions only by using a small amount of test samples.

This invention belongs to the technical field of oil drilling equipment, specifically a particle injection device for oil drilling, including a particle tank, which is a parallel double tank that can be used alternately; an outlet pipe is installed at the lower end of the particle tank, and an regulating pipe and an injection pipe are sequentially installed on the outlet pipe. A nozzle pipe and a mixing pipe are respectively installed at both ends of the injection pipe, and the mixing pipe is connected to the main manifold; a spiral plate is installed inside the mixing pipe; a control hose is installed inside the regulating pipe, and a control pipe is installed on the regulating pipe, connecting the control hose and the inner wall of the regulating pipe, and the control pipe is connected to an external hydraulic pump; this invention has a simple structure, can impact and agitate the particles in the tank to prevent particles from clogging the outlet, and at the same time, agitate the particles to make the particles and drilling fluid evenly mixed, while continuously controlling and adjusting the particle injection volume to change the concentration of injected particles.

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 discloses an anti-radiation trench gate SOI LDMOS device structure, and belongs to the technical field of power semiconductors. The structure comprises a substrate, a buried oxide layer (BOX), a P buried layer, a drift region, a top Ptop region, a body region, a body contact region, a source region, a drain region and a trench gate structure. According to the structure, the P buried layer is arranged above the BOX, the back gate effect under the effect of total dose radiation is effectively restrained, threshold voltage drift and increase of leakage current are reduced, meanwhile, RESURF is formed by the P buried layer and the Ptop region at the top, and the device is kept to have good low-loss performance. The top highly-doped Ptop region can be used as an effective discharge channel of hole current after single-particle incidence, and risks of body region barrier lifting and parasitic triode triggering are reduced, so that the single-particle resistance of the device is enhanced, and the overall anti-radiation hardening level is improved. The method is suitable for high-reliability power electronics such as aerospace, satellite power management and military electronic systems.

The invention discloses a Roots pump accelerated degradation test device and method aiming at a multi-stress environment. The device comprises a plurality of test branches, a test base, a gas storage tank, a particle injection tank, a gas circulation pipeline, a particle filtering and collecting device and a multi-parameter monitoring system, the test branch is fixedly arranged on the test base and comprises a plurality of roots pumps and screw pumps which are connected in sequence; the gas storage tank is arranged at one end of the test base and is connected with the input ends of the different test branches through gas circulation pipelines; the gas circulation pipeline between the gas storage tank and the test branch is also connected with a particle injection tank; the output end of the test branch is connected with the particle filtering and collecting device through a gas circulating pipeline; the multi-parameter monitoring system comprises a plurality of sensors and a multi-parameter monitoring platform. According to the invention, the accelerated degradation and performance degradation characteristic test can be carried out on the roots pump under the multi-stress environment of high particle concentration, high temperature, variable load and the like, and the scientific evaluation of the service reliability and failure mechanism of the roots pump is realized.

The invention discloses a multiphase flow particle jet nozzle structure, and belongs to the technical field of multiphase flow jet structures. The device comprises an outer pipe, an inner pipe, a shunting box, an isolating ring, an injection box and an air injection pipe array, the outer pipe and the inner pipe are coaxially connected, the inner pipe is arranged in the shunting box, the outer pipe is arranged outside the shunting box, at least one air injection inlet pipe is arranged on the lower portion of the shunting box, and the shunting box is connected with the injection box through the isolating ring; the injection box is provided with an inner pipe injection hole and a plurality of air injection pipe outlets, the inner pipe injection hole is connected with the inner pipe, the isolation ring is provided with a plurality of air injection pipe inlets and an air injection pipe array, the air injection pipe array comprises a plurality of air injection pipes, and the two ends of each air injection pipe are connected with the corresponding air injection pipe inlet and the corresponding air injection pipe outlet respectively. The problem that the quality of a wind tunnel test flow field is affected due to the accumulation phenomenon of solid particles such as ice crystals and sand dust in the jetting process at present is solved, and particle aggregation caused by advanced mixing in the nozzle is avoided.

This invention relates to a Faraday cup with high electron collection efficiency, comprising a collection cavity, a permanent magnet, and a particle injection channel. An inclined surface is provided inside the collection cavity near the side wall, creating a conical space with a gradually increasing volume from the inlet to the bottom of the cavity, which alters the collision direction of particles within the cavity. The permanent magnet is located outside the collection cavity and generates a magnetic field to change the trajectory of incident and secondary electrons within the cavity. The particle injection channel is located at the inlet of the collection cavity. The first end of the particle injection channel connects to the inlet of the collection cavity, and the second end has a suppression electrode located at the front end of the second end of the particle injection channel. The advantages of this invention are that it allows electrons to collide with the inclined side wall, reducing reflected electrons emitted towards the cup opening, and the permanent magnet alters the electron path, reducing escape and improving electron collection efficiency.

The invention belongs to the technical field of functional nanofiber membrane preparation, and particularly relates to a device and a method for dynamically adding functional particles on line in solution blowing spinning. According to the device and method for dynamically adding the functional particles on line in the solution blowing spinning, by arranging a spinning assembly, a particle injection assembly, a pneumatic shearing assembly and a control assembly, 1, the particle injection assembly is controlled by the control assembly to enable the particles to be injected into spinning jet flow in a discrete mode at a specific moment, and the spinning jet flow is controlled by the pneumatic shearing assembly; therefore, the agglomeration phenomenon of the particles in the conveying and injection process is reduced; 2, the pneumatic shearing assembly constructs an airflow field on the periphery of the spinning jet flow, and applies transverse aerodynamic force to the spinning jet flow, so that particles entering the spinning jet flow are diffused in the radial direction, the spatial distribution of the particles in the fiber forming process is improved, the phenomenon that the particles are gathered in the center of a fiber membrane is reduced, and the fiber membrane yield is improved; and the distribution uniformity of the functional particles in the fiber membrane is improved.

The application discloses a method for evaluating self-adaptive gel particle injection and plugging of low-permeability oil reservoirs, which adopts a large-displacement constant-flow pump to inject the material, so that the shearing of the material through the sandstone porous medium is closer to the actual situation of an oilfield site; meanwhile, the low-permeability layer and the fractured layer are separated and evaluated through a multi-stage series connection mode, the migration degree of the material and the retention and plugging situation of the material to the fractured layer are quantitatively calculated, and the comparison test is carried out under the same low-permeability oil reservoir geological conditions, so that the relatively simple, fast and accurate material suitable for the application of the target oil reservoir geological conditions is screened out, the material is closer to the real situation of the oil reservoir, the evaluation is more comprehensive and more accurate, and the method can effectively guide the formulation and on-site implementation of the injection process of the pore self-adaptive gel particle in the low-permeability oilfield site.