50 results about "Particle sampling" patented technology

A sampling device for use with an air pump of an air-sampling system, the sampling device comprising: a base-section, a first closure cap integrally moulded with the body of the base- section, the first closure cap for fitting to and for covering an open-end of a connector; and a top- section comprising, a second closure cap integrally moulded with the body of the top-section, the second closure cap for fitting to and for covering a first open-end of an air inlet.

The utility model relates to the technical field of pebble bed type high-temperature gas cooled reactors, in particular to a spherical particle sampling device, which comprises particle feeding equipment, a sampling device and a sampling device, the stock bin is connected with the particle feeding equipment and is used for storing to-be-sampled spherical particles; the feeding mechanism communicates with the stock bin and is used for changing the feeding speed of the stock bin by adjusting the vibration frequency; the material distributing mechanism is connected with the feeding mechanism and is used for uniformly dividing and moving the to-be-sampled spherical particles; the sampling mechanism comprises a material distributing cover plate device and a material collecting and sampling device, the material distributing cover plate device is connected with the material distributing mechanism, the material distributing cover plate device is connected with the material collecting and sampling device, and the material collecting and sampling device is used for collecting the uniformly divided to-be-sampled spherical particles by ascending or descending the material distributing cover plate device. Therefore, the problem that existing equipment cannot meet the requirement for rapid sampling of large-flux spherical particles and the like is solved.

The invention relates to the technical field of automatic sampling, mixed batch and uniform distribution devices of particles, and discloses a particle sampling and mixed batch uniform distribution device and method. A sampling cup library, a three-axis machine, an industrial robot, a sampling cup cap screwing mechanism, a cup cap temporary storage mechanism, a rotary code scanning assembly, an automatic labeling machine, a platform scale assembly, a sample separation device and a three-dimensional mixed feeding and discharging mechanism are arranged on the rack, a plurality of brackets are placed on the sampling cup library, and a plurality of sample cups, a sample separation cup A and a sample separation cup B are placed on the brackets respectively; a bracket clamping jaw is arranged on the three-axis machine, and the three-axis machine moves the corresponding bracket to a switching station close to the industrial robot through the bracket clamping jaw; a cup body clamping jaw is arranged on the industrial robot; the particle sampling and mixed batch uniform division device and method provided by the invention solve the problems that the existing microsphere particle sampling, mixed batch and uniform division efficiency is low, and errors and safety risks exist in manual operation.

A fine particle sampling device (10) includes: a first electrode (22) that is cylindrical, has a first opening at a first end in an axial direction of the cylinder and a second opening at a second end in the axial direction of the cylinder; a second electrode (24) that extends in the axial direction, is disposed in the first electrode with a space from an inner surface of the first electrode; a third electrode (25) that extends in the axial direction, is disposed in the first electrode with a space from the inner surface, is thicker than the second electrode, and is disposed at a different position in the axial direction than the second electrode; a supply portion (28) that supplies a liquid into the first electrode so that the liquid is stored on a portion of the inner surface of the first electrode in the axial direction; a voltage application portion (26) that applies a first voltage between the first electrode and the second electrode and applies a second voltage between the first electrode and the third electrode; a drive portion (32) that rotates the first electrode around a rotation axis that extends in the axial direction and passes through the first electrode; and a recovery portion (30) that recovers the stored liquid.

The utility model relates to an active pumping sampler for environmental gas, which comprises a box body with an opening on the front side, a sucking pump is arranged on one side of the bottom in the box body, a gas inlet pipe and a gas outlet pipe are respectively arranged on the sucking pump, and the gas inlet pipe and the gas outlet pipe respectively penetrate out of two sides of the box body. An adjusting valve, a flow meter, a particulate matter sampling and collecting mechanism and a gas sampling and collecting mechanism are sequentially arranged on the gas inlet pipe in the gas flowing direction, a plurality of supporting rods are arranged on the rear side in the box body, supporting clamping sleeves are arranged at the front ends of the supporting rods, and the gas inlet pipe is clamped in the supporting clamping sleeves. When the sampling device is used, particulate matters and gas in sampled gas can be conveniently collected in a classified manner, the filter paper and the packed column are simple and convenient to replace, and the use is flexible and convenient.

The application discloses a kind of vector particle filtering methods for ranging signal SLAM, comprising the following steps: running N groups of particle filters for N ranging signals, estimating signal source position and user positioning;Particle filter carries out filtering estimation, and the value of each particle is updated according to the motion model of user and signal source;The transient weight value of all particles of each group of particle filters is calculated;The transient mean and transient covariance of user positioning state and signal source position state in each group of particle filters are calculated respectively;The auxiliary mean and auxiliary covariance of each group of particle filters are calculated;Each group of particle filters is updated with joint weight: each group of particle filters calculates the local state quantity and local covariance of corresponding user positioning and signal source position;Resampling is carried out on each group of particle filters;Estimate N filters, output the state quantity and covariance of user positioning.This application can reduce the difficulty of particle sampling, improve the real-time performance of algorithm, and is suitable for practical engineering application.

The present invention belongs to the technical field of automobile exhaust particulate matter sampling and measurement, and specifically relates to a particle sampling device with rapid dilution and backwash cleaning and a method for using the same, comprising an exhaust dilution device, a dilution gas preheating device, a particle filtering device and a backwash device; the exhaust dilution device comprises a dilution gas convection duct, an exhaust pipe, a flow control meter and an air compression pump, the dilution gas convection duct is sleeved on the outer layer of the exhaust pipe, and a cavity I is formed between the dilution gas convection duct and the exhaust pipe, and a conical cavity II is formed between the front end of the dilution gas convection duct and the front end of the exhaust pipe. The particle sampling device and the method for using the same can ensure that the sample gas does not condense and the composition does not change during transportation, and the sample gas dilution efficiency is high. After the sampling is completed, the entire device can be backwashed and cleaned, the sampling results are accurate, the device structure is simple, and the design is ingenious and reasonable.

The present invention provides a continuous detection device for atmospheric pollutant emissions, which belongs to the field of detection equipment and includes a flue gas sampling component, wherein the flue gas sampling component is located above the chimney and is used to collect and sample the flue gas flowing out of the chimney; the particle sampling component is located below the flue gas sampling component and is rotatable and is used to sample particles in the flue gas; a transmission arm is respectively connected to the flue gas sampling component and the particle sampling component and is used to move the two to the top of the chimney; compared with the prior art, the present invention can, when performing a flue gas sampling operation, allow the flue gas to pass through the particle sampling component and the flue gas sampling component in sequence; when the flue gas passes through the particle sampling component, some particles in the flue gas are filtered out by the particle sampling component, and then when the flue gas flows to the flue gas sampling component, the particulate matter contained therein will be reduced. When the particulate matter can be completely filtered out, the blockage of the flue gas flow channel on the flue gas sampling component can be avoided.

The utility model belongs to the technical field of beta-ray particulate matter identification. The utility model provides a beta-ray particulate matter sampling spot auxiliary visual judgment device. The beta-ray particulate matter sampling spot auxiliary visual judgment device comprises a paper tape wheel, a tensioning wheel, a paper collecting wheel, a beta detector, a C14 source pressure head, an I-type visual sensor, an I-type visual sensor, a sliding block with a guide rail, a photoelectric switch, an air inlet pipe and a filter paper tape. The utility model aims to solve the problem of online judgment of abnormal data of an existing beta-ray particulate matter online monitoring system, improve the checking capability of the abnormal data of particulate matters, reduce the operation and maintenance fault processing times, provide real particulate matter judgment capability and improve the accuracy of the abnormal data of the particulate matters. And the judgment of abnormal data of the particulate matter concentration caused by instrument problems or actual conditions cannot be determined is reduced.

The invention relates to the related technical field of sampling detection, in particular to an underwater particulate matter sampling detection device which comprises an underwater propeller, a sampling barrel for collecting underwater particulate matters and a filter box for filtering particulate matters in a sampled water source, and a swing sampling assembly for driving the sampling barrel to move is arranged at the top of the filter box. According to the underwater particulate matter sampling device, an arc-shaped limiting block in the swing sampling assembly is precisely embedded in a fixed arc-shaped limiting groove to move, and reciprocating swing of a connecting rotating shaft is ingeniously converted; the connecting rotating shaft drives the fan-shaped swing plate at the tail end of the connecting rotating shaft to regularly swing back and forth, and compared with a traditional static sampling point, the sampling barrel can sweep a certain fan-shaped area in a three-dimensional space through reciprocating swing, so that the space coverage range of single sampling is increased, and particulate matter samples in a larger-volume water body are effectively collected.

The utility model discloses sampling equipment for preventing and controlling atmospheric pollution, which belongs to the technical field of gas sampling equipment and comprises a rack module, a moving module is arranged at the bottom of the rack module, and a sampling power module and a drying power module are respectively arranged on two sides of the top of the rack module. A particle sampling mechanism and a gas sampling mechanism are arranged on two sides of the sampling power module; by designing the particle sampling module, the gas sampling module, the cleaning module and the drying power module which are independent, the particle sampling module at the front end can be cleaned and dried circularly, sampled particle pollutants can be collected, a filter screen is kept clean, impurities in gas can be filtered during recycling, and the service life of the filter screen is prolonged. It is guaranteed that a rear-end gas sampling device accurately collects sampled gas, and the analysis accuracy of pollution gas is improved.

This invention discloses an AUV-UFastSLAM algorithm optimized based on the whale algorithm, comprising a series of processes including initialization, prediction, sampling, map updating, and resampling. This method optimizes the particle sampling process using the whale algorithm, enabling the particle swarm to move towards a high-likelihood region, making the AUV pose estimation closer to the true value. An inertia weight factor is introduced to improve the whale algorithm's position update formula, increasing the population convergence speed and accuracy. Simultaneously, Cauchy mutation is used to randomly perturb the optimal neighborhood to increase population diversity and improve the algorithm's global search capability. An improved resampling method is used for particle filtering to ensure particle diversity. Through these adjustments, the accuracy of AUV simultaneous localization and map creation is improved.

A single-particle sampling device and system according to the present invention includes: a sampling head, a motor, an air pump and a control module; the sampling head includes an upper cover, a particle size cutting plate, a sample stage, a sampling head rotating shaft and a lower cover; the upper cover and the lower cover form a cavity; an air inlet communicating with the outside atmosphere is provided on the upper cover, and an air outlet connected to the air pump is provided on the lower cover; the particle size cutting plate is disposed in the cavity, forms an acceleration cavity with the upper cover and a collection cavity with the lower cover; one or more particle size cutting holes are provided on the particle size cutting plate, and a number of uniformly distributed sample positions are provided on the sample stage, and each sample position is provided with grooves having the same number as the particle size cutting holes for placing sample membranes; the sampling head rotating shaft is disposed below the sample stage, and the motor is respectively connected to the sampling head rotating shaft and the control module to drive the sample stage to rotate according to the instructions of the control module. The present invention can remotely and real-time control the on / off of the air pump and the switching of the sample positions, thereby realizing continuous and automatic sampling.

To provide novel systems and methods for detecting particles in a fluid.SOLUTION: Provided herein are systems and methods allowing for automated sampling and / or analysis of controlled environments, for example, to determine the presence, quantity, size, concentration, viability, species or characteristics of particles within the environment. The described systems and methods may utilize robotics or automation or remove some or all of the collection or analysis steps that are traditionally performed by human operators. The methods and systems described herein are versatile and may be used with known particle sampling and analysis techniques and particle detection devices including, for example, optical particle counters, impingers and impactors.SELECTED DRAWING: Figure 2

The invention relates to the field of photo-thermal power generation, in particular to a high-temperature thermochemical particle sampling system and a particle sampling method. The system comprises a sampler, a stock bin, a vacuum generator, an inert atmosphere supply device, pipelines and valves, wherein the pipelines and the valves are arranged among all the components. Wherein the sampler is in direct contact with and absorbs a high-temperature thermochemical particle sample; the stock bin is arranged at the outlet of the sampler and is used for temporarily storing the sucked thermochemical particle sample; an inlet of the vacuum generator is connected with the stock bin and used for keeping the vacuum degree of the stock bin to provide suction force. The inert atmosphere supply device can provide inert atmosphere for the particle samples in each link; the valve can control the on-off state of a pipeline between devices in real time and is used for adjusting the flow direction of gas / solid media. By forming negative pressure to generate suction force and combining protection measures of inert atmosphere and cooperative operation of all pipeline valves, particles in different areas can be sampled in real time, and meanwhile, the problem of sample distortion caused by an oxidation process in a particle sampling process can be effectively avoided.

The invention discloses a plastic particle ash removal method and an ash removal device, and relates to the technical field related to dust cleaning.The method comprises the steps that plastic particle feature information is collected, plastic particle sampling detection is conducted, and dust feature information is obtained. And optimizing airflow separation parameters for airflow separation dust removal to obtain a plurality of optimized airflow separation parameters. And optimizing electrostatic dust collection parameters for electrostatic dust collection of the plastic particles to obtain a plurality of optimized electrostatic dust collection parameters, and predicting to obtain a plurality of final residual quantities after electrostatic dust collection. And combining the plurality of optimized airflow separation parameters, the plurality of electrostatic neutralization parameters and the plurality of optimized electrostatic dust collection parameters to obtain a plurality of ash removal parameter combinations, and selecting to obtain an optimal ash removal parameter combination according to the plurality of final residual quantities and the combined power consumption of the plurality of ash removal parameter combinations for ash removal. The technical problems that in the prior art, a plastic particle ash removal method is high in ash removal energy consumption, low in ash removal efficiency and poor in ash removal effect are solved.

The invention discloses a multi-type aero-engine high-altitude simulation sampling device and simulation system, the multi-type aero-engine high-altitude simulation sampling device comprises an oil filter module, a multi-stage dilution module and a sampling module which are sequentially communicated with a sampling rake, and the sampling rake is used for collecting high-altitude simulation emissions of aero-engines; the oil filter module is communicated with the sampling rake and comprises a plurality of channels, each channel is provided with a filter screen and a plurality of filter layers, and the oil filter module is used for filtering emissions output by the sampling rake by adopting the corresponding channel based on the type of the aero-engine to obtain a detection object; the multi-stage dilution module comprises a plurality of diluters and is used for carrying out multi-stage dilution on a detection object discharged by the oil filter module; the sampling module comprises a particle sampling system and a gas sampling system, and is used for carrying out particle sampling and gas sampling on the detection substances subjected to multi-stage dilution so as to be used for detecting high-altitude simulation emissions of an aero-engine. The sampling device can be suitable for sampling and detecting emissions of various different types of aero-engines.

The particle sampling device (10) is a particle sampling device for sampling particles into a liquid, wherein the device comprises: a first electrode (22) which is cylindrical and has both ends in the axial direction open; a second electrode (24) which extends in the axial direction of the first electrode (22) and is arranged in the first electrode (22) at a distance from the inner surface (66) of the first electrode (22); a supply unit (28) which supplies liquid (68) into the first electrode (22) so that the liquid (68) accumulates on a portion of the inner surface (66) in the direction around the axis B of the first electrode (22); a voltage applying unit (26) which applies a voltage between the first electrode (22) and the second electrode (24); a driving unit (32) which rotates the first electrode (22) around a rotation axis extending in the axial direction of the first electrode (22) and passing through the first electrode (22); and a recovery unit (30) which recovers the accumulated liquid (68).

The invention belongs to the technical field of particle detection devices, and particularly relates to an automatic particle sampling and detecting device, an electrolytic aluminum system and a control method of the electrolytic aluminum system. Information about the number of particles and the volume of each particle may be obtained. According to the device, the stirring device is arranged in the detection pool, and the stirring device is used for uniformly distributing sample particles in the electrolyte, so that the detection deviation caused by non-uniform particle distribution is prevented. The automatic particle sampling and detecting device is integrated and installed on the fluorine-loaded aluminum oxide conveying pipeline, the working parameters of the discharging system and the electrolytic cell can be regulated and controlled in real time according to particle size information, the discharging time, the discharging amount and the parameters of the electrolytic cell can be adjusted in time according to information such as the particle size of materials, faults of the electrolytic cell can be avoided, and the service life of the electrolytic cell is prolonged. The production efficiency can be effectively improved, and the energy consumption is reduced.

The present invention provides a surface particle sampling head, comprising a housing, on which an air inlet pipe and an air extraction pipe are disposed. The outlet end of the air inlet pipe and the inlet end of the air extraction pipe are respectively directed toward the surface of the object to be sampled. The air medium can be blown toward the surface of the object through the air inlet pipe and then sucked out by the air extraction pipe. The surface particle sampling head of the present invention blows air toward the surface of the object to be sampled through the air inlet pipe, blowing up floating particles, fibers, bacterial flora, etc. on the surface of the object, which are then sucked up by the air extraction pipe. A capture structure is synchronously provided at the rear end for capturing the particles, thereby evaluating parameters such as environmental quality and product quality. The structure has a wide range of applications, is simple in structure, and has low manufacturing costs.

Systems and methods for controlled environment sampling, including automated and / or robotically controlled sampling, are provided herein. The systems and methods are useful for determining the presence, quantity, size, concentration, viability, species, or characteristics of particles, including viable biological particles, within a controlled environment. The described systems and methods may utilize rotational motion via robotics, automation, and / or control systems to reduce or eliminate some or all steps performed by a human operator in traditional particle collection and / or analysis methodologies. The described systems and methods may utilize rotational motion via robotics, automation, and / or control systems to provide particle sampling over a well-defined time period for an individual impactor and / or sequential sampling with multiple impactors.

Provided herein are systems and methods allowing for automated sampling and / or analysis of controlled environments, for example, to determine the presence, quantity, size, concentration, viability, species or characteristics of particles within the environment. The described systems and methods may utilize robotics or automation or remove some or all of the collection or analysis steps that are traditionally performed by human operators. The methods and systems described herein are versatile and may be used with known particle sampling and analysis techniques and particle detection devices including, for example, optical particle counters, impingers and impactors.

The invention discloses a mixed particle sampling and particle size distribution measuring device, and belongs to the technical field of mixed particle measurement. The mixed particle sampling and particle size distribution measuring device comprises a detector body, a radio microscope is installed on a detection groove, and a sampling assembly is installed on the detector body and used for sampling particles at different depths in a mixing machine; the front end of the sampling pipe can be inserted into a corresponding depth according to the position needing sampling, at the moment, the conical block is tightly attached to the limiting sleeve, and the situation that part of particles close to a pipe opening enter the pipe opening before equipment is started, so that the sampling result is not real, and the detection result is affected is prevented; the sampling tube is arranged in the detection groove, so that the conical block relieves the limit of the sampling tube, the particles are sucked into the detection groove, the particles are intercepted in the detection groove through liquid filtration, then the particles are scattered through the stirring blades, the particle size is measured through the transmission electron microscope, the proportion of the multiple particles is analyzed, and the detection of the mixed particles can be completed.

The invention provides a surface particle sampling head which comprises a shell, an air inlet pipe and an air suction pipe are arranged on the shell, the outlet end of the air inlet pipe and the inlet end of the air suction pipe face the surface of an object to be sampled, and an air medium can be blown to the surface of the object through the air inlet pipe and then sucked out through the air suction pipe. According to the surface particle sampling head, air is blown to the surface of an object to be sampled through the air inlet pipe, floating and sinking, fibers, flora and the like on the surface of the object are blown up and then sucked by the air suction pipe, the capturing structure is synchronously arranged at the rear section for capturing, then parameters such as environment quality and product quality are evaluated, and the structure is wide in application range, simple in structure and convenient to operate. The manufacturing cost is low.

The invention discloses a sampling device for monitoring forest lagging air particulate matters, and belongs to the field of air particulate matter sampling, the sampling device comprises a sampling platform and a mobile platform, and the top end of the sampling platform is provided with a mounting groove and a plurality of storage grooves; the inner end face of the mounting groove is connected with two multi-angle mechanical arms used for limiting branches and sampling through adjusting assemblies, and the inner side wall of the storage groove is connected with a heat preservation shell. Through the arrangement of the adjusting assembly and the sample storage cylinders, the three rows of sample storage cylinders can be utilized to cover the whole space from the canopy layer to the bottom layer of the forest, the vertical distribution rule of particulate matter sedimentation is revealed, each row of seven sample storage cylinders cover seven upward, horizontal and downward inclination angles of 0-90 degrees, the influence of the blade angle on the dust retention efficiency is quantified, and the dust retention efficiency is improved. Due to the arrangement of the liquid dropping assembly, the root of the cut leaf can be immersed into a nutrient solution, the cell death time can be delayed, the particulate matter adsorption state can be kept, and dehydration distortion can be avoided.

A powder particle sampling device effectively solves the problem that an existing powder particle sampling device is inconvenient to use. Comprising an up-down axial discharging pipe, a left-right axial sleeve with a rightward opening is arranged on the left side of the discharging pipe, a collecting column capable of being inserted into the discharging pipe is coaxially arranged in the sleeve, the collecting column can move left and right and can rotate, a collecting groove is formed in the upper end of the collecting column, and a falling groove is formed in the lower end of the sleeve; a collecting box which can be communicated with the collecting groove and is provided with an upward opening is detachably connected into the falling groove, a transverse groove in the left-right direction is formed in the rear side wall of the sleeve, an inclined groove communicated with the left end of the transverse groove is formed in the rear side wall of the sleeve, and an inserting column inserted into the inclined groove is arranged on the collecting column. The device is simple in structure, novel in conception, convenient to use and high in practicability.

A fine particle sampling device (10) for sampling fine particles in a liquid comprises: a cylindrical first electrode (22); a second electrode (24) extending in the axial direction of the first electrode (22) and disposed in the first electrode (22) at an interval from an inner surface (66) of the first electrode (22); a duct (12) surrounding the first electrode (22); a first cylindrical part (19) connected to one end of the duct (12); a second cylindrical part (21) connected to the other end of the duct (12); a voltage application part (26) for applying a voltage across the first electrode (22) and the second electrode (24); and a drive part (36) for rotating the first electrode (22). The first cylindrical part (19) or the second cylindrical part (21) has a through-hole (33). The through-hole (33) is positioned above the liquid surface (68a) of a liquid (68) stored at a section of the inner surface (66) in the direction around the axis of the first electrode (22), and the through-hole (33) is a hole for recovering the liquid (68) via the through-hole (33).

The invention relates to an aerosol growth mechanism decoupling monitoring system and a secondary aerosol heterogeneous nucleation and agglomeration contribution share quantification method. The monitoring system comprises a condensation nucleus control module, an isotope CO2 regulation and control module, a multi-measuring-point absorption tower and a particle monitoring analysis module, and the condensation nucleus control module is used for generating carbon-free monodisperse SiO2 aerosol condensation nucleuses; the isotope CO2 regulation and control module is used for providing 13CO2 mixed gas with target regulation and control concentration for the premixing tank; a tower body of the multi-measuring-point absorption tower is axially provided with a plurality of particle sampling points for capturing dynamic changes in the aerosol growth process; the particle monitoring and analyzing module is used for collecting and analyzing the silicon content difference and the carbon isotope content difference of particles at adjacent measuring points. Compared with the prior art, the method provided by the invention can be used for quasi-decoupling heterogeneous nucleation and agglomeration, quantifies the contribution of the heterogeneous nucleation and agglomeration to aerosol mass transfer growth, and provides a scientific basis for optimizing parameters of an amine method carbon capture process and reducing the escape rate of an absorbent.

The present invention discloses an experimental device and method for simulating trace aerosol leakage and gas leakage. The aerosol generation and introduction module comprises a gas source and an aerosol generator which are connected in sequence. The aerosol generated by the aerosol generator passes through an experimental cavity to a leak plate, a simulated leak tube, an aerosol collection tube and a particle sampling analyzer. The particle sampling analyzer collects aerosol particle characteristic data before and after leakage and transmits it to a data acquisition system. By measuring the mass concentration, particle number concentration and particle size of the aerosol at the inlet and outlet of the simulated leak tube and in the compensation gas, the aerosol mass leakage rate, particle number leakage rate and aerosol leakage ratio are obtained in combination with the volume of the experimental cavity, the working flow rate of the particle sampling analyzer, the compensation gas flow rate and the sampling time. The gas leakage parameters and the aerosol leakage parameters are coupled to establish a relationship between aerosol leakage and gas leakage, which is applied to the analysis of the source term of radioactive material leakage release. The method of the present invention is easy to operate.

The auger powder particle sampling valve comprises a valve body, an auger, an extension pipe and an actuating assembly, the actuating assembly is installed at one end of the valve body, a flange is arranged at the other end of the valve body, a collecting opening is formed in the extension pipe, the extension pipe is arranged on the valve body, and the auger is arranged in the extension pipe and connected with the actuating assembly through a coupler. The actuating assembly is used for driving the auger to rotate; the valve body is provided with a discharge port, and the sampling bottle is connected with the discharge port. According to the invention, the auger is matched with the actuating assembly to realize material transmission, and sampling of powder and particles is realized. And in the static state, the materials cannot be continuously conveyed to the discharging opening. In addition, forward and reverse rotation of the auger can control the material transmission direction, selective sampling is achieved, and it is guaranteed that sampled materials have representativeness. The discharge port is provided with the self-closing mechanism, so that the discharge port can be automatically opened and closed, and the sealing performance of the sampling valve is ensured.