55 results about "Particulate matter sampler" patented technology

The invention discloses a PM2.5 particulate mass sampler with four sampling channels: in the first sampling channel, the sampling head includes a PM2.5 cutter, a diffused solution container, Teflon filter membrane and nylon filter membrane; the sampling head in the second sampling channel includes a PM2.5 cutter and Teflon filter membrane; the sampling head in the third sampling channel includes PM2.5 cutter and two-layer quartz membrane; the sampling head in the forth sampling channel includes PM2.5 cutter and polycarbonate membrane.

The invention discloses an air particulate matter sampler capable of automatically changing a membrane. The air particulate matter sampler comprises a shell, a filter membrane storage mechanism, a lifting clamping rotation mechanism, a detection mechanism and a control device, wherein the filter membrane storage mechanism, the lifting clamping rotation mechanism, the detection mechanism and the control device are arranged inside the shell; the filter membrane storage mechanism comprises a to-be-detected filter membrane base and a detected filter membrane base which are arranged on an inner plate of the shell; the lifting clamping rotation mechanism comprises a lifting gear, a clamping device and a rotating device; the lifting gear is arranged on the inner plate of the shell; the clamping device and the rotating device are arranged on the lifting gear; the control device is connected to the detection mechanism and the lifting clamping rotation mechanism. By adopting the air particulate matter sampler, artificial membrane exchange is replaced by mechanical movement through multi-freedom motion of a mechanical structure, the long-term sampling requirements are met, and the labor intensity of a worker is greatly reduced, each filter membrane is automatically sampled by the system, the air particulate matter sampler is free of manual intervention, a user can know the working state of the machine in real time by remote control and monitoring, short message inquiring and notifying functions, an unattended operation is really achieved, and the air particulate matter sampler is reasonable in design, compact in structure, light in weight, good in portability and applicable to outdoor work.

The invention discloses a two-channel automatic particulate monitoring device. The two-channel automatic particulate monitoring device comprises a two-channel particulate using module and a two-channel atmospheric particulate detection module. The two-channel particulate using module comprises a sampling gas pump, a gas-flow-ratio adjusting valve and a two-channel particulate sampler. Gas enters the two-channel particulate sampler via the gas-flow-ratio adjusting valve under the action of the sampling gas pump. The two-channel atmospheric particulate detection module comprises two detection channels, a filter paper tape, a filter paper tape supporting structure and a detection platform, wherein each detection channel comprises a sample gas path, a detector and a radioactive source. The monitoring device has a simple structure, realizes rapid and accurate sampling, effectively improves the sampling quality of an atmospheric particulate sampling system and can simultaneously measure the concentrations of particulates with two different particle sizes, i.e., PM10 and PM2.5, in the atmospheric environment.

The invention discloses a tri-channel atmosphere particulate matter sampler, which comprises a sampling bracket, a control cabinet, a control panel, rubber tubes and a base, wherein the sampling bracket is composed of a vertical bar, a horizontal bar and a sampling head; the horizontal bar is a radial shape and is hinged with the vertical bar; the sampling head is arranged on the horizontal bar; the control cabinet is composed of a vacuum pump, a flowmeter and a circuit board which are arranged in the control cabinet; an air suction port of the vacuum pump is provided with a shunt; the flowmeter is provided with a sensor; the control panel is arranged on the external surface of the control cabinet; the base is a rectangular frame and the bottom part of the base is provided with a roller wheel; the bottom end of the vertical bar of the sampling bracket is fixed on the top of the control cabinet; the control cabinet is fixed on the base; and the rubber tubes are respectively arranged between the sampling head and the inlet of the flowmeter and between the outlet of the flowmeter and the shunt. The invention has the characteristics of large collecting flow and capability of collecting atmosphere suspended matter with different particulate grades at the same time, and has simple structure, and convenient carrying and use.

The invention discloses a six-channel air particle sampling device. The sampling device adopts a dividing device to divide collected TSP particles into six parts according to isotropy, six paths of air can be any combination of a straight pipe, PM10 and PM10 cutter to PM2.5 cutter, the obtained particles can be any combination of TSP, PM10 and PM2.5, and the six paths of air can be connected with the air pumping end of a sampling pump by virtue of a flow rate control device after being filtered by a filter membrane and discharged by virtue of the filter. The six-channel air particle sampling device is small in size, light in weight and convenient to move and maintain; by utilizing the characteristic that the sampling flow of a middle-flow cutter is equal to that of a small-flow cutter, the homologous parallel sampling is actually realized, the adopted cutters are the standard cutters, the multi-circuit TSP, PM10 or (and) PM2.5 homologous parallel sampling is realized by utilizing one TSP cutter, and six groups of parallel sampling can be realized at most.

The invention discloses an external loading type unpowered atmospheric particulate sampler. According to the sampler, a sampling hole is formed in the input end of the sampler, a multi-hole exhaust pipe is arranged at the output end of the sampler, and a particulate cutter is arranged on an air flow channel between the sampling hole and the multi-hole exhaust pipe. The external loading type unpowered atmospheric particulate sampler further comprises a differential pressure sensor, a main controller, an electric valve and an empennage regulating element, wherein the electric valve is arranged on the multi-hole exhaust pipe, the empennage regulating element is arranged at the output end of the sampler, and the main controller is connected with the differential pressure sensor through leads. The external loading type unpowered atmospheric particulate sampler is mounted on an aircraft. According to the sampler, a power device does not need to be configured, the atmospheric particulate sampling is realized by using power generated by external air flow, a difference value between air pressures at the input end and the output end of the sampler is detected by the differential pressure sensor in real time, and the electric valve and the empennage regulating element are intelligently regulated according to the difference value between the air pressures by the controller so as to keep a flow rate of sampling air constant, thus realizing constant-speed sampling.

The invention discloses an air particulate sampler. The air particulate sampler comprises a cylindrical sampling volumetric flask, an air inlet pipe arranged at the top end of the sampling volumetric flask, an air exhaust pipe arranged at the bottom end of the sampling volumetric flask and a particulate mass concentration sensor and a particle number concentration sensor both arranged on the inner side wall of the sampling volumetric flask, wherein double layers of electronic adsorption screen plates are arranged at the middle section of the sampling volumetric flask, the interval between the upper-layer electronic adsorption screen plate and the lower-layer electronic adsorption screen plate is 15mm, adsorption holes are distributed on the upper-layer electronic adsorption screen plate and the lower-layer electronic adsorption screen plate in a crisscrossed manner, the electronic adsorption screen plates are connected with a single chip microcomputer, the single chip microcomputer is connected with a display device, a draught fan is arranged on the air inlet pipe, and a micro air pump is arranged on the air exhaust pipe. The air particulate sampler disclosed by the invention greatly improves the detection accuracy, realizes flow detection and automatic adjustment, has perfect functions, and not only can carry out sampling, but also can intuitively display sampling results to improve the work efficiency.

The present invention relates to fume sampler, is especially diluted and mixed flue turbulent flow stepped sampler for collecting particle containing sample exhausted from fixed source, and belongs to environment monitoring technology. The present invention is based on available flue dust sampler and environment air particle matter sampler and has one increased diluting bin and corresponding pressure balancing air path. The present invention can sample different particle matter exhausted by fixed source and of different particle sizes in equal speed while monitoring. Particle sample of different particle size range may be collected in the physical and chemical conditions near the truc condition when flue dust enters environment air.

The invention relates to an intelligent dehumidification device of an atmospheric particulate matter sampler. The intelligent dehumidification device is characterized by comprising a conical cover, an inverted U-shaped dehumidification device, a steel pipe and three humidity sensors, wherein a conical flow guide plate is arranged on the inner wall of the conical cover; a circular through hole for holding one of the humidity sensors is formed in the side surface of the conical cover; the conical cover is connected with a steel wire mesh through a thread; a first vertical section of the inverted U-shaped dehumidification device is sleeved with a condensing sleeve, and the bottom end of the first vertical section is connected with the conical cover; a second vertical section of the inverted U-shaped dehumidification device is sleeved with a heating sleeve, and the bottom end of the second vertical section is connected with the steel pipe; an arc section is provided with a circular through hole for holding another humidity sensor; the top end of the steel pipe is connected with the bottom end of the second vertical section; a circular through hole for holding the last humidity sensor is formed in the lower part of the steel pipe; a signal processing system in an electronic control system can judge humidity signals received from the three humidity sensors in real time and adjust the working states of the condensing sleeve and the heating sleeve by controlling the on or off of corresponding electronic power switches according to judgment results.

The invention discloses a constant-temperature multipath air and particle sampler. The constant-temperature multipath air and particle sampler comprises a cutter, a blower box and a main case. The main case is arranged on a frame. The cutter is connected to the blower box. The blower box is arranged on the frame. The constant-temperature multipath air and particle sampler also comprises an air exhaust part, a thermostatic part, a heating part and a particle sampler in the main case. The air exhaust part comprises singlechip control units, sucking pumps, solenoid valves and electronic flowmeters, and the sucking pump, the solenoid valve and the electronic flowmeter are electrically connected to the singlechip control unit. The constant-temperature multipath air and particle sampler can realize continuous switchable sampling and single path or double path simultaneous sampling, can be used in a low temperature area, has simple appearance, complete functions and light weight, is convenient for use and carrying, really realizes unattended operation and saves a lot of resources.

The invention discloses an automatic membrane change device and method for air particulate matter samples. The device comprises an upper closing cavity, a lower closing cavity, a porous moving disk, atransmission device I, a transmission device II and a controller, wherein the upper closing cavity and the lower closing cavity are located in a dustproof box; the porous moving dick is located between the upper closing cavity and the lower closing cavity and is sued for bearing a filter membrane tray; the transmission device I drives the moving disk to move horizontally; the transmission deviceII drives the lower closing cavity to lift; the controller controls the transmission device I and the transmission device II to move; the upper closing cavity is connected with a cutter connection head at the top of the dustproof box; the lower closing cavity is connected with an air pump through a pipeline; a horizontal displacement sensor is arranged on the transmission device I; a vertical displacement sensor is arranged on the transmission device II; and the air pump, the horizontal displacement sensor and the vertical displacement sensor are electrically connected with the controller. Thedevice disclosed by the invention is capable of realizing the automatic change of a plurality of filter membranes so as to decrease the operation cost, and is reliable in operation.

The invention discloses a closed-type internal animal building ambient air particle monitoring method. The closed-type internal animal building ambient air particle monitoring method comprises the following steps: points are distributed in an animal housing by a quartered diagonal selected-point method, at least five points are provided as sampling points, and the sampling height is 0.4-1.5 m above the ground of the animal house; the sampling points are continually sampled in the animal house through a particle sampler, and the concentration of particles is monitored; and the continuous sample method comprises sampling during feed feeding, animal rest, cleaning of the animal house, and bedding change. As the particles in the animal house are continually monitored, the grain size distribution of air fine-particles in the animal house are acquired by the particle sampler, and impacts on chemical characteristics of the particles from such factors as animal management, animal ingestion and excretion are analyzed and studied; and by virtue of animal in-vivo test and in-vitro experiments models, impacts on physiological and biochemical indexes, behavioral indexes and production performance indexes of animals in different growth stages from the particles in the animal house are studied, and a theoretical basis is provided to guarantee and improve the animal health.

The invention relates to a particulate matter sampler with changeable filter membrane. The particulate matter sampler comprises a casing; a filter membrane storage mechanism, a first slider mechanism,a second slider mechanism and a third slider mechanism are mounted in the casing. The filter membrane storage mechanism is fixed to a supporting table and comprises a refrigerating cavity, a filter membrane barrel which hasn't been used for sampling and a filter membrane barrel which has been used for sampling; the filter membrane barrel which hasn't been used for sampling and the filter membranebarrel which has been sampling are arranged in the refrigerating cavity side by side. The first slider mechanism, the second slider mechanism and the third slider mechanism are all provided with photoelectric encoders. The first slider mechanism is connected with the filter membrane barrel which hasn't been used for sampling, the second slider mechanism is connected with the filter membrane barrel which has been used for sampling, and the third slider mechanism is mounted on a membrane changing platform transversely and disposed above the filter membrane storage mechanism. The membrane changing platform is provided with a membrane supply port, a recovery port and a membrane changing claw; the membrane supply port corresponds to the filter membrane barrel which hasn't been used for sampling in position, the recovery port corresponds to the filter membrane barrel which has been used for sampling in position, and the membrane changing claw is connected with the third slider mechanism. The particulate matter sampler has the advantages of high precision in automatic changing of the filter membranes, high positioning accuracy and high precision of sample data.

The invention discloses a person working environment occupational safety and health index system simulation test bench, which comprises main parts such as a person respiration simulation system, a working environment simulation cabin body, a spraying system, an air flow rectifier, a dampening machine, a floor air conditioner, an exhausting fan, a particulate sampler, a particulate generator, a data analysis system and a Malvern laser particle size analyzer. The exhausting fan and the air flow rectifier placed in the simulation cabin body are used for simulating the operation air flow field, the spraying system is placed in the simulation cabin body, and spraying under certain pressure is thus realized; and the particulate generator, the dampening machine and the floor air conditioner are placed at the free end of an air inlet of the simulation cabin body to simulate the environment and the micro climate of working particulates, and parameters such as the particulate inhalation condition by a working person and the particulate concentration are measured through the person respiration simulation system and the particulate sampler. Thus a reliable technical support is provided for research on the person working environment occupational safety and health index system.

The invention discloses a multi-channel air particulate matter sampler shunting device. The shunting device comprises an upper end cover and a lower end cover, wherein an airflow inlet is formed in the top end of the upper end cover; the lower end cover comprises a cylinder and a flange located under the cylinder; six conical grooves are uniformly formed in the upper surface of the cylinder around a center axis; side walls of the conical grooves are interested in the center of the cylinder to form a shunting body with a spire structure; airflow outlets are formed in the bottom of the conical grooves; the upper end cover and the lower end cover are buckled to form a shunting cavity. According to the shunting device, air sucked from the same airflow inlet is divided into six parts, the six air paths are symmetrically distributed, taken samples are completely parallel, and multiple parallel samples can be collected simultaneously under the condition of the same air source and the same power. The whole shunting cavity is not provided with a platform, so that dead space volume is avoided, and the problem that the sampling accuracy is influenced due to the fact that the airflow is directly intercepted by the platform is effectively solved.

The invention provides a rotating disc type particulate matter sampler capable of automatically changing a film. The sampler comprises a base, a feeding film storage barrel, a feeding mechanism, a discharging film storage barrel, a filter film clamp, a sampling head and a photoelectric switch, wherein the feeding mechanism is located below the base, a fixing seat, a rotating disc and a rotating disc rotating mechanism are further included, the fixing seat is fixed on the base, the feeding film storage barrel, the discharging film storage barrel and the sampling head are fixed on the fixing seat, the rotating disc is arranged in the fixing seat and is connected with the rotating disc rotating mechanism fixed below the base, and the photoelectric switch is used for determining whether the rotating disc rotates in place or not. The sampler is advantaged in that the sampler is not provided with a complex transmission mechanism, is simple in structure and convenient to disassemble, assembleand maintain, reduces a linear module type vertical transmission mechanism, saves more space, greatly reduces the size of the whole machine, reduces one output power source and saves the cost as a filter film clamp in a discharging filter film cylinder falls down under the action of gravity.

The invention discloses a dilution particle sampler and a sampling method thereof in the technical field of environmental protection monitoring instruments. The dilution particle sampler comprises a sampling mouth, two sets of Pitot tubes and a temperature sensor, wherein a sample gas inlet tube is mounted at the right end of the sampling mouth; a heating band is mounted on the outer wall of the sample gas inlet tube; a flow sensor is mounted at the right end of the sample gas inlet tube; a diluter is mounted at the right side of the flow sensor through a pipeline; the right end of the diluter is connected with the inlet of a retention chamber through a pipeline; a particle cutter is connected to the right side of the outlet of the retention chamber through a pipeline; the temperature sensor and a pressure sensor are arranged at the left side of the particle cutter; the temperature sensor and the pressure sensor are in electric output connection with a singlechip; a diverter gas inlet tube is mounted at the bottom end of the particle cutter; the bottom end of the diverter gas inlet tube is connected with a diverter; a diverter gas outlet tube is mounted at the bottom end of the diverter; and the bottom end of the diverter gas outlet tube is connected with a sampling filter membrane through a pipeline.

A particulate sampler system includes a diluted exhaust mass flow controller that receives flow from a dilution mass flow controller and a laminar flow element (LFE). The dilution mass flow controller and LFE are fluidly arranged parallel to one another. A controller communicates with the mass flow controllers and the LFE to determine the flow through these devices, command valves in the mass flow controllers and generate data for determining calibration coefficients and correction factors. The diluted exhaust mass flow controller is calibrated and calibration coefficients are generated using a first to fourth order curve fit. Similarly, initial calibration coefficients are generated for the dilution mass flow controller. The diluted exhaust mass flow controller is set at a desired flow point. The dilution mass flow controller is varied between set points corresponding to different dilution ratios at the common, desired set point. The data obtained is used to determine a correction factor for example, by performing a linear curve fit of the data. The correction factor is applied to the calibration coefficients associated with the mass flow controllers.

An atmospheric particulate sampler is disclosed, and is characterized by comprising an air inlet pipeline, a mounting table top and a fan device, the air outlet end of the air inlet pipeline is connected with a sampling mechanism, a transmission mechanism and a driving mechanism are arranged on the mounting table top, and the fan device comprises a case and an air inducing device; the driving mechanism drives the sampling mechanism to ascend and descend to achieve switching between opening and closing of the transmission mechanism and opening and closing of the air inducing device in order toachieve automatic film changing and automatic sampling, the air inducing device comprises a variable-frequency fan, an air inducing pipeline and an air speed control assembly, a flow detection assembly is arranged in the air inducing pipeline, and the air speed control assembly adjusts the rotating speed of the variable-frequency fan according to data fed back by the flow detection assembly to control air duct flow. By means of the sampler, researchers can execute sampling and analysis research work in an area far away from a high-risk sampling area, one person can control multiple devices toconduct scientific research at the same time, the problem of automatic control over the devices is solved, and the problem of labor shortage is also solved.

The invention provides a multi-channel air particulate matter sampler flow calibration switching device. A sampler comprises a top plate, a bottom plate and straight line guide rods connected with the top plate and the bottom plate, a cutter tray provided with N cutters and a filter membrane clamp tray provided with N filter membrane clamps are installed on the straight line guide rods in a sleeving mode, and an elbow clamp which can push the filter membrane clamp tray to make reciprocating motion in the vertical direction is further arranged on the bottom plate. The top plate is provided with air inlet nozzle slideways, a sliding plate which can slide along the top plate in the left-right direction is installed at the bottom of the top plate, and N sampling connection nozzles and N calibration connection nozzles are arranged on the sliding plate, wherein N is any integer ranging from two to eight. When the sampler is calibrated, the sliding plate is moved to switch air inlet nozzles, and then a calibration instrument is connected with a calibration flexible pipe, so that flow calibration can be conducted, flexible pipes on the air inlet nozzles are not needed to be pulled out, calibration operation steps are simplified, and convenience and rapidness are achieved.

The invention discloses an air particulate matter automatic monitoring system and a monitoring method. The system comprises a cabinet body, a temperature-humidity controller and an intelligent controlsystem; a constant-temperature and constant-humidity box body is arranged in the cabinet body; a main sample disk, a secondary sample disk, a balance weighing device and a particulate sampler are arranged in the constant-temperature and constant-humidity box body; the sampling pipe connected with the particulate sampler is arranged at the top of the cabinet body; a sample-changing manipulator isarranged between the main sample disk and the secondary sample disk; sample conveying manipulators are arranged among the main sample disk, the balance weighing device and the particulate sampler; a sample disk isolation hood for separating the secondary sample disk from the constant-temperature and constant-humidity box body is arranged at the external of the secondary sample disk; a side-openingwindow is arranged at one side of the secondary sample disk on the cabinet body, and a main window is formed in the front of the cabinet body. The monitoring system disclosed by the invention integrates the weighing, the balancing, the sampling and the data processing; the manual intervention is avoided, the weighing accuracy and the stability are improved, the labor intensity is effectively relieved, and the timeliness is guaranteed.

The present invention is a centrifugal sampler of atmospheric particles, wherein the structure comprises a gas suction pump, a particle cutter, and a speed adjustable motor, wherein the particle cutter comprises a centrifugal blade wheel, a multi-seam stator and a closed bearing, and the centrifugal blade wheel can perform high speed rotation around the axis line of the multi-seam stator. According to the present invention, the centrifugal sampler can be used for quantitative measurement of the total suspended particles (short for TSP) in the air, the PM10 value, the PM2.5 value and any PM values, provides real-time monitoring data of pollution sources for Environmental Protection Bureau and monitoring enterprises, and has characteristics of simple structure, low cost, easy processing, small volume and easy use compared with the past samplers; and with the single sampler, a variety of air quality indexes can be measured, and good practical application values are provided.

The invention relates to an automatic film-changing air particulate matter sampler capable of sampling a comparison sample. The sampler comprises an upper shell assembly, a lower shell assembly, a warehouse moving manipulator assembly, a sampling assembly and a filter membrane storage lifting assembly, and the warehouse moving manipulator assembly, the sampling assembly and the filter membrane storage lifting assembly are mounted on the lower shell assembly. The air particulate sampler has the following advantages: through combined movement of different structures of the warehouse moving manipulator assembly, the sampling assembly and the filter membrane storage lifting assembly, automatic collection and unattended operation of air particulates can be achieved, the working efficiency and the automation degree of air particulate sampling are improved, and collection of air particulate comparison samples is achieved.

The invention discloses a multi-channel rotation type air particulate matter sampler, belongs to the technical field of sampling equipment, and solves the problem that a measurement result has errorssince a single air inlet channel of an existing device. The multi-channel rotation type air particulate matter sampler has the technical characteristics that the multi-channel rotation type air particulate matter sampler comprises a cleaning mechanism, a base, a working motor, a PLC (Programmable Logic Controller) and a shell, wherein the right end of the lower surface of the base is independentlyprovided with the working motor and the PLC; the working motor and the PLC are electrically connected; a spacing plate is arranged in parallel above the base; the spacing plate and the base are fixedly connected; a shell is arranged above the spacing plate; the middle position of the spacing plate is provided with a hollow bearing pedestal; the spacing plate is rotatably connected with the bearing pedestal; and the bottom of the shell is welded with the bearing pedestal. By use of the sampler, particulate matters can be quickly and comprehensively sampled, an electronic adsorption plate can collect dust particulates, and a particulate concentration sensor can measure the contents of particulate matters in air.

The invention discloses a calibration platform for a particulate matter light scattering detector. The calibration platform comprises a cloud platform, a light scattering detector, a particulate matter sampler, and an automatic weighing system. The particulate matter sampler is connected with the automatic weighing system. The cloud platform and the particulate matter sampler carry out data interaction transmission. The cloud platform and the automatic weighing system carry out data interaction transmission. The cloud platform and the light scattering detector carry out data interaction transmission. The cloud platform can control and adjust the light scattering detector, the particulate matter sampler and the automatic weighing system, and the cloud platform can automatically correct thelight scattering detector at regular intervals according to uploaded monitoring data and a set correction protocol.