Virtual cutter of multifunctional PM2.5 aerosol enrichment system

Abstract

The utility model belongs to the technical field of atmospheric particle enrichment, and particularly relates to a virtual cutter of a multifunctional PM2.5 aerosol enrichment system. According to the utility model, the rubber adsorption sheet, the rubber passage pipe, the negative pressure passage component, the annular screw fixing sealing device and other components are made into an integrated structure; the front disc and the rear disc are made of isoprene rubber, the rear disc and the rear disc are made of stainless steel, and a gap is reserved between the conical channels of the upper disc and the lower disc to separate condensed particles from clean air. And the connection of the condenser pipe and the cutter main body part, the connection part of clean air and the outside, the connection part of the bottom of the three-way pipe and the cutter main body, the connection part of the enriched particle collection and the connection part of the particle counter are respectively fixed. The vacuum pump is connected with the virtual cutter through a flow meter, and the flow and the speed of airflow are controlled by the flow meter. The virtual cutter is convenient to operate; wherein the stainless steel material is high in strength, and the isoprene rubber material is high in elasticity, so that an adsorbed object can be fully attached to an adsorption surface, and the air tightness is excellent. The virtual cutter can enrich atmospheric particles by 7-10 times.

Description

Technical Field

[0001] The utility model belongs to the technical field of atmospheric particle enrichment, and specifically relates to a virtual cutter of a multifunctional PM2.5 aerosol enrichment system. Background Art

[0002] Atmospheric PM2.5 refers to particles in the atmosphere with an aerodynamic equivalent diameter of less than or equal to 2.5 microns, also known as inhalable particles. According to research reports, PM2.5 has a small particle size and a large specific surface area. It is easy to enrich heavy metals, water-soluble inorganic ions, organic matter and other toxic and harmful chemical components, and has a long suspension time in the atmosphere and a long transmission distance. Therefore, the negative impact on human health and atmospheric environmental quality cannot be ignored. PM2.5 has an important impact on air quality, visibility, human health, etc. Many studies have shown that people with underlying diseases will have more serious health effects when exposed to fine air particles. For example, under the same conditions, people with cardiovascular diseases will have more serious lung damage than normal people when exposed to fine air particles. Fine particles can produce cardiovascular toxic effects through direct and indirect pathways, causing a vicious cycle of the heart and lungs, and will also affect the human immune system, nervous system, etc. Therefore, the study of the biological toxicity of haze aerosol particles has become one of the research hotspots and frontier directions in this field of technology. In particular, the toxic and harmful chemical components carried by haze aerosol particles endanger the health of the population and have attracted great attention from the whole society. Studies have shown that in animal modeling experiments, experimental results are increasingly widely considered to be important indicators for toxicity evaluation. For example, exposure tests include whole-body exposure, head exposure, oral and nose exposure, and intratracheal exposure. However, oral and nose exposure experiments on mice for the biological toxicity of atmospheric particulate matter are still limited by aerosol concentration and exposure time. They are still using offline aerosol generators to simulate actual atmospheric conditions, and cannot truly reflect the biological toxicity characteristics of actual atmospheric particulate matter. In addition, the concentration of some toxic ions in the air is below the detection limit, etc. Based on the current state of the prior art, the inventors of this application intend to provide a key part concentration device in a multifunctional aerosol enrichment system, especially a virtual cutter for a multifunctional PM2.5 aerosol enrichment system. Utility Model Content

[0003] The purpose of the utility model is to provide a core component of a multifunctional aerosol enrichment system, especially a virtual cutter of a multifunctional PM2.5 aerosol enrichment system, based on the current status of the prior art and to overcome the problems existing in related technologies at home and abroad.

[0004] The utility model can reduce the cost of related technologies in the field of atmospheric particle enrichment technology and enhance the economy of related core technologies.

[0005] The utility model is a virtual cutter of a multifunctional PM2.5 aerosol enrichment system, which mainly utilizes the principle of aerodynamics to concentrate and enrich the aerosol to a designed multiple without changing any physical and chemical properties except the concentration. The effect is stable enough to support relevant instruments and equipment to detect low-content particles and ions in the atmosphere and characterize their toxicity levels.

[0006] Specifically,

[0007] The utility model discloses a virtual cutter of a multifunctional PM2.5 aerosol enrichment system, which comprises a virtual cutter main body and a connecting part thereof; the virtual cutter main body is formed into an integrated structure by a rubber adsorption sheet, a rubber passage tube, a negative pressure passage component, and a ring screw fixing sealing device.

[0008] In the utility model, the rubber adsorption sheet and the rubber passage tube are made of isoprene rubber, and the negative pressure passage component and the annular screw are made of stainless steel.

[0009] In the utility model, a gap is left between the upper and lower conical channels of the virtual cutter to separate condensed particles from clean air.

[0010] In the utility model, the virtual cutter comprises five annular screw buckles, which respectively fix the connection between the condenser and the cutter body, the clean air and the external connection, the connection between the bottom of the three-way pipe and the cutter body, the enriched particle collection connection and the particle counter connection.

[0011] In the utility model, the vacuum pump is connected to the virtual cutter through a flow meter, and the flow rate and speed of the air flow are controlled by the flow meter.

[0012] More specifically,

[0013] In the utility model, the flow rate of the vacuum pump 26 is controlled by the flow meter 20, so that the atmospheric airflow after saturated condensation flows through the virtual cutter, and the particle-enriched airflow 12 and the clean air flow 5 are separated at the upper plate conical channel and the lower plate conical channel 14. The particle-enriched airflow passes through the upper plate conical channel 11 due to the action of gravity and inertia;

[0014] The main body of the virtual cutter and the rotating annular screw buckle are made of stainless steel with high rigidity, and its high strength can completely resist the negative pressure in the cavity; the parts connected by the rotating annular screw buckle are added with adsorption parts, and the required materials are all made of isoprene rubber sheets with good elasticity, which can increase its air tightness and ensure that the adsorbed object and the adsorption surface are fully fitted;

[0015] The virtual cutter and its attached parts are connected by five annular screw buckles 3, which respectively fix the connection between the condenser tube 1 and the main part of the cutter, the large-flow airflow channel 25 and the clean airflow outlet pipe 6, the connection between the bottom of the tee 23 and the cutter body, the connection between the right part of the tee and the enriched particle collection 21, and the connection between the top cover piece 8 of the tee and the particle counter; an isoprene rubber adsorption sheet 7 is provided at each annular screw buckle connection to ensure that the adsorption surface is fully fitted and increase its air tightness.

[0016] When the virtual cutter is used, the atmospheric airflow is first saturated with low water bath temperature and condensed with high condensation temperature to become condensation airflow 2. A condensation insulation bag 15 is wrapped around the outside of the condensation tube to maintain the internal temperature of the condensation tube, the purpose of which is to increase the particle size of the collected PM2.5 particles to 3-4 μm. After the vacuum pump 26 provides negative pressure and the flow meter 20 controls the flow, the atmospheric condensation airflow flows along the condensation tube 1 to the virtual cutter;

[0017] An isoprene rubber adsorption sheet 7 is placed between the condenser tube 1 and the virtual cutter to ensure that the adsorption surface is completely fitted and increase its air tightness, and is tightened by an annular screw buckle 3; the atmospheric condensation airflow enters the lower plate conical channel 14, and the lower plate conical channel 14 is arranged in the lower plate chamber 24 of the virtual cutter, and the cross section of the lower plate circular vent hole 22 is arranged in the lower annular plate 4 of the virtual cutter, and is slightly lower than the cross section of the lower plate annular channel;

[0018] The upper plate of the virtual cutter and the lower part of the three-way pipe 23 are provided with an isoprene rubber adsorption sheet 7, which is tightened by an annular screw buckle 3; the upper plate conical channel 11 is arranged in the upper plate chamber of the virtual cutter, and the cross section of the upper plate circular vent hole 17 is arranged in the upper annular plate 10 of the virtual cutter, and is slightly higher than the cross section of the upper plate conical channel 14;

[0019] The upper plate and the lower plate of the virtual cutter are provided with six screw holes 18, which are fastened with bolts;

[0020] When in use, the atmospheric condensed air flows through the circular vent holes 22 of the lower plate, and the particle-enriched air flow 12 is separated from the clean air flow 5 at the air flow separation point 13. Due to the action of gravity and inertia, the particle-enriched air flow 12 flows from the circular vent holes 22 of the lower plate through the circular vent holes 17 of the upper plate and enters the conical channel 11 of the upper plate. The clean air flow 5 flows to the large-flow air flow channel 25 due to the action of negative pressure. The flow rate of this virtual cutter is controlled by the rotor flowmeter 20, and the rotor flowmeter 20 is connected to the clean air flow outlet pipe and the vacuum pump, and the vacuum pump 26 provides negative pressure.

[0021] The particle-enriched airflow 12 flows through the upper plate conical channel 11 along the upper plate circular vent hole 17 and flows to the tee pipe 23 along the upper plate of the virtual cutter;

[0022] The top of the three-way pipe is covered with a top sealing sheet 8, and a ring screw buckle 3 is provided at the connection between the top sealing sheet 8 of the three-way pipe and the particle counter, and an isoprene rubber adsorption sheet 7 is added. When enriching particle sampling, the top is in a sealed state;

[0023] The right part of the three-way pipe and the enriched particle collection connecting pipe 21 are provided with an annular screw buckle 3, and an isoprene rubber adsorption sheet 7 is added to ensure its air tightness. The enriched particle airflow 12 flows through the enriched particle collection connecting pipe 21 and is collected by the fully automatic atmospheric film sample collector developed by the laboratory. It can also be connected to the atmospheric film sample collector of relevant brands in the market (such as Thermo Fisher, Agilent, etc.);

[0024] The top of the three-way pipe can be connected to an atmospheric particle counter to verify the concentration of the enriched particles in the atmosphere and further verify the enrichment efficiency.

[0025] In the utility model:

[0026] The clean air flow channel 16 is arranged in the upper plate chamber, and the diameter of the clean air flow channel is 15-25 mm, and the optimal diameter is 20 mm.

[0027] The diameter of the lower plate chamber 24 is 91mm-101mm, and the optimal diameter is 96mm; the diameter of the upper plate chamber is 91mm-101mm, and the optimal diameter is 96mm;

[0028] The height of the lower plate chamber 24 is 31-37 mm, and the optimal height is 34 mm. The height of the lower plate conical channel 14 is 29-33 mm, and the optimal height is 31 mm.

[0029] The height of the upper plate chamber is 25-31 mm, the optimal height is 28 mm, and the height of the upper plate conical channel 14 is 24-28 mm, the optimal height is 26 mm;

[0030] The bottom diameter of the lower conical channel 14 is 21-27 mm, and the optimal diameter is 24 mm. The diameter of the round vent hole 22 at the top of the lower conical channel is 3-5 mm, and the optimal diameter is 4 mm.

[0031] The diameter of the top of the upper plate conical channel 11 is 19-25mm, and the optimal diameter is 22mm; the diameter of the circular vent hole 17 at the bottom of the upper plate conical channel is 5-7mm, and the optimal diameter is 6mm; in the utility model, the diameter of the circular vent hole at the bottom of the upper plate is slightly larger than the circular vent hole at the top of the lower plate to increase the atmospheric particle enrichment ratio;

[0032] In the present invention, the diameter of the virtual cutter lower annular disk 4 and the virtual cutter upper annular disk 19 is 125-135 mm, and the optimal diameter is 130 mm;

[0033] The utility model provides a virtual cutter for a multifunctional PM2.5 aerosol enrichment system, which utilizes the principles of aerodynamics to concentrate and enrich the aerosol to a designed multiple without changing any physical and chemical properties except concentration. The effect is stable enough to support related instruments and equipment to detect low-content particles and ions in the atmosphere and characterize their toxicity levels. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the virtual cutter structure.

[0035] Figure 2 This is the cross-section of the upper plate of the virtual cutter.

[0036] Figure 3 This is the cross-section of the virtual cutter bottom plate.

[0037] Numbers in the figure: 1. condenser tube, 2. airflow after condensation of particles, 3. rotating annular screw buckle, 4. annular disk at the bottom of virtual cutter, 5. clean airflow, 6. clean airflow outlet pipe, 7. rubber adsorption sheet, 8. top cover sheet, 9. particle enriched airflow channel, 10. annular disk at the top of virtual cutter, 11. conical channel of upper disk, 12. particle enriched airflow, 13. airflow separation point, 14. conical channel of lower disk, 15. condensation insulation belt, 16. clean airflow channel, 17. circular vent hole of upper disk, 18. screw hole, 19. annular disk of upper disk of virtual cutter, 20. rotor flowmeter, 21. enriched airflow collection flow pipe, 22. circular vent hole of lower disk, 23. three-way pipe, 24. lower disk chamber, 25. large flow airflow channel, 26. vacuum pump DETAILED DESCRIPTION

[0038] The present invention is further described in detail below through specific examples and in conjunction with the accompanying drawings.

[0039] Example 1

[0040] A virtual cutter of a multifunctional PM2.5 aerosol enrichment system is prepared, as shown in the figure, which is an integrated structure consisting of a virtual cutter main body and its connecting part, a rubber adsorption sheet, a rubber passage tube, a negative pressure passage component, and an annular screw fixing sealing device, including five annular fixing screw buckles 3, which respectively fix the connection between the condenser 1 and the cutter main body, the connection between the clean air outlet pipe 6 and the virtual cutter, the connection between the bottom of the tee 23 and the cutter main body, the connection between the enriched air flow collection circulation pipe 21 and the right side of the tee 3, and the connection between the particle counter and the top of the tee.

[0041] The rubber adsorption sheet and rubber passage tube are made of isoprene rubber, and the negative pressure passage component and annular screw are made of stainless steel; a gap is left between the upper and lower conical channels of the virtual cutter to separate condensed particles from clean air; the vacuum pump is connected to the virtual cutter through a flow meter, and the flow rate and speed of the air flow are controlled by the flow meter.

[0042] When using,

[0043] The saturated atmospheric air flows through the condenser 1 to condense the atmospheric particles, and the condensation insulation bag 15 is wrapped around the outside of the condenser to maintain the internal temperature of the condenser. The condensed atmospheric airflow 2 enters the virtual cutter through the connection fixed by the annular screw buckle. A rubber adsorption sheet 7 is added to the connection between the two to ensure that the adsorption surface is completely fitted and increase its air tightness. The main part of the virtual cutter is a circular groove-shaped upper plate and a lower plate 24. The parts where the two plates fit are the upper annular plate 10 and the lower annular plate 4. There are six screw holes 18 on the annular plate to fix the two plates. The lower plate is provided with a lower conical channel 14, and a circular hole 22 is provided on the top of the lower plate conical channel. The aperture of the circular hole is 3-5mm, and its optimal aperture is 4mm. The upper plate is provided with an upper conical channel 11, and a circular hole 17 is provided on the top of the upper plate conical channel. The aperture of the circular hole is 5-7mm, and its optimal aperture is 6mm. There is a gap between the two holes, which is convenient for the separation of the enriched airflow and the clean airflow, and the aperture of the circular hole in the upper plate is slightly larger than the aperture of the lower plate, so that the enriched particles can pass through. The condensed atmospheric airflow 2 flows through the lower conical channel 14, and the atmospheric enriched particles 12 are separated from the clean airflow 5 at the airflow separation point 13. The atmospheric condensed particles flow through the upper conical channel 11 due to the action of gravity and inertia, while the clean airflow 5 flows along the large flow airflow channel 27 due to the action of negative pressure, and the flow is controlled by the rotor flowmeter 20, and the negative pressure is provided by the vacuum pump 26. The upper conical channel is connected to the tee 23 through an annular screw buckle, and the enriched particles flow through the enriched particle collection pipe 21 at the right end of the tee to collect the enriched particles. At this time, the upper annular screw buckle of the tee and the top cover sheet 8 are closed. If the enrichment effect or enrichment ratio is tested, the top cover sheet 8 can be opened and the particle concentration counter can be connected to the top of the tee through a rubber tube.

[0044] The results of use show that this virtual cutter can concentrate and enrich aerosols to the designed multiples without changing any physical and chemical properties except concentration. The effect is stable enough to support related instruments and equipment to detect low-content particles and ions in the atmosphere and characterize their toxicity levels.

Claims

1. A virtual cutter for a multifunctional PM2.5 aerosol enrichment system, characterized in that: The virtual cutter is formed into an integrated structure by a virtual cutter main body, a connecting part thereof, a rubber adsorption sheet (7), a rubber passage tube, a negative pressure passage component, a rotating annular screw buckle (3) and a sealing device. The main part of the virtual cutter is a circular groove-shaped upper plate and a lower plate chamber (24), the parts where the two plates are fitted are the virtual cutter upper annular plate (10) and the virtual cutter lower annular plate (4), six screw holes (18) are provided on the annular plate for fixing the two plates, the lower plate is provided with a lower plate conical channel (14), the top of the lower plate conical channel is provided with a lower plate circular vent hole (22), and the aperture of the lower plate circular vent hole (22) is 3-5 mm; The sealing device is a virtual cutter and its attached parts, which are connected by five rotating annular screw buckles (3). The rotating annular screw buckles (3) respectively fix the connection between the condenser tube (1) and the main part of the cutter, the connection between the large flow airflow channel (25) of the main part of the cutter and the clean airflow outlet pipe (6), the connection between the bottom of the three-way pipe (23) and the cutter body, the connection between the right part of the three-way pipe and the enriched airflow collection and circulation pipe (21), and the connection between the top cover plate (8) of the three-way pipe and the particle counter; A rubber adsorption sheet (7) is provided at the connection of the annular screw buckle to ensure that the adsorption surface is completely fitted and increase its air tightness; The virtual cutter is connected to the vacuum pump (26) via a rotor flowmeter (20), and the flow rate and speed of the air flow are controlled by the rotor flowmeter; In the virtual cutter, the lower plate conical channel (14) is arranged in the lower plate chamber (24), and the cross section of the lower plate circular vent hole (22) is arranged in the lower annular plate (4) of the virtual cutter and is slightly lower than the cross section of the lower plate annular channel; In the virtual cutter, the upper plate conical channel (11) is arranged in the upper plate chamber of the virtual cutter, and the cross section of the upper plate circular vent hole (17) is arranged in the upper annular plate (10) of the virtual cutter and is slightly higher than the cross section of the lower plate conical channel (14).

2. The virtual cutter according to claim 1, characterized in that: The rubber adsorption sheet (7) and the rubber passage tube are made of isoprene rubber, and the negative pressure passage component and the rotating annular screw buckle are made of stainless steel.

3. The virtual cutter according to claim 1, characterized in that: A gap is left between the upper annular disk and the conical channel of the lower annular disk of the virtual cutter to separate condensed particles from clean air.

4. The virtual cutter according to claim 1, characterized in that: The upper annular disk and the lower annular disk are provided with six screw holes (18) and are fastened by rotating annular screw buckles.

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