A high-voltage electrostatic collection device for aerosol particulate matter

Abstract

The utility model provides a kind of high-pressure electrostatic collection device of aerosol particulate matter, including control box, integrated insulation shell and insulation backplate, sampling air pump is installed in control box side, integrated insulation shell upper end is equipped with air inlet, and arc-shaped buffer fairing is installed in air inlet inside, integrated insulation shell right side is fixed with polytetrafluoroethylene insulation shell, and polytetrafluoroethylene insulation shell front and rear right side is respectively installed with screw rod nut seat and hollow guide block by bolt, the design solves the filter screen taking and placing structure of existing high-pressure electrostatic collection device, and the problem that full-spectrum collection effect is not good, particle property is easily damaged and operation convenience is poor exists, the integrated structure of screw transmission pull type multiple filter screen, particle property protection and convenient taking and placing is used in the utility model, while realizing full-spectrum sampling, guaranteeing particle original property, simplifying operation process.

Description

Technical Field

[0001] This invention relates to a high-voltage electrostatic collection device for aerosol particles, belonging to the field of aerosol particle collection technology. Background Technology

[0002] Atmospheric aerosols, consisting of solid and liquid particles suspended in the atmosphere, are the core source of cloud condensation nuclei (CCN) and ice nuclei (IN), directly influencing cloud and precipitation formation, global energy balance, and climate change. They hold crucial research value in fields such as weather modification (rain and snow enhancement, hail and fog suppression) and air pollution control. Accurate collection and analysis of aerosol concentration, particle size distribution, morphology, and chemical composition are essential prerequisites for revealing pollutant sources, optimizing weather modification operation plans, and evaluating operational effectiveness. To meet the needs of aerosol observation, various sampling devices have been developed, primarily falling into two categories: membrane sampling and direct deposition. Membrane sampling uses a pump to drive airflow through a filter membrane to trap particulate matter, requiring subsequent laboratory extraction and analysis; however, it suffers from problems such as particle aggregation and solvent interference. Direct deposition, on the other hand, achieves direct deposition of particulate matter on an electron microscope grid through natural sedimentation or electrostatic adsorption, preserving the original particle morphology and making it suitable for microscopic observation. Among them, high-voltage electrostatic acquisition devices have become the mainstream choice for microscopic observation scenarios due to their high sampling efficiency and good particle dispersion. Their core principle is to generate electrostatic adsorption force through a high-voltage electric field, causing aerosol particles to break away from the airflow trajectory and deposit on the surface of the carrier.

[0003] However, the existing high-voltage electrostatic acquisition devices have many defects in their filter placement and removal structures, resulting in poor full-spectrum acquisition effects, easy damage to particle properties, and poor operation convenience. For example, the filters are mostly fixed with bolts or designed with a disassembled overall door, making the placement and removal process cumbersome and with low positioning accuracy. The way the filter is fixed to the sampling sheet is unreasonable, which can easily cause mechanical collisions and material adsorption of particles. There is an urgent need for a high-voltage electrostatic acquisition device for aerosol particles to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-voltage electrostatic collection device for aerosol particles, thereby solving the problems mentioned in the background section. This invention adopts an integrated structure that integrates threaded pull-out multiple filters, particle shape protection, and convenient pick-and-place, achieving full-spectrum sampling while ensuring the original particle shape and simplifying the operation process.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-voltage electrostatic collection device for aerosol particles includes a control box, an integrated insulating shell, and an insulating backplate. A sampling pump is installed on one side of the control box. An air inlet is located at the upper end of the integrated insulating shell, and an arc-shaped buffer guide plate is installed inside the air inlet. A polytetrafluoroethylene (PTFE) insulating shell is fixedly connected to the right side of the integrated insulating shell. A lead screw nut seat and a hollow guide block are respectively installed on the front and rear right sides of the PTFE insulating shell via bolts. Bearing seats and fixed guide blocks are respectively fixed at the front and rear ends of the insulating backplate. An inner fixing ring is installed and fixed inside the bearing seat, and a lead screw is fixed inside the inner fixing ring. A knob is installed at one end. The left end of the lead screw passes through the lead screw nut seat via a thread. A smooth guide rod is horizontally fixed at the left end of the fixed guide block, and the smooth guide rod slides through the hollow guide block. A rubber sealing frame is fixed at the left edge of the insulating back plate, and the rubber sealing frame is in close contact with the opening of the polytetrafluoroethylene insulating shell. Multiple filter frames are horizontally installed at the left end of the insulating back plate. A ring frame is provided on the upper left side of each of the multiple filter frames. A honeycomb rectifier plate, a coarse particle filter, a medium particle filter, a fine particle filter, and a nano particle filter are horizontally clamped in the multiple ring frames from top to bottom. The honeycomb rectifier plate, the coarse particle filter, the medium particle filter, the fine particle filter, and the nano particle filter are all located within an integrated insulating shell.

[0006] Furthermore, the sampling pump is connected to the exhaust end at the lower end of the integrated insulating housing via a sampling pump hose.

[0007] Furthermore, an anode discharge needle assembly and a grounding sampling plate are respectively provided at the upper and lower ends of the integrated insulating housing, an anode wire and a cathode sampling wire are respectively installed at the upper and lower ends of the side surface of the integrated insulating housing, and a grounding discharge wire is installed on one side of the lower end of the integrated insulating housing.

[0008] Furthermore, the anode wire is connected to the anode discharge needle assembly, the cathode sampling wire is connected to the grounding sampling plate, and the other ends of the anode wire and the cathode sampling wire are connected to the control box via wires. A portable handle is installed on the upper end of the control box.

[0009] Furthermore, the grounding discharge line is connected to the grounding sampling plate.

[0010] Furthermore, a handle is installed at the right end of the insulating backplate.

[0011] Furthermore, the honeycomb rectifier plate, coarse particle filter, medium particle filter, fine particle filter, and nanoparticle filter all have tweezer grooves at their front and rear ends.

[0012] The beneficial effects of this utility model: This utility model provides a high-voltage electrostatic collection device for aerosol particles. Because it incorporates an integrated insulating shell, an arc-shaped buffer guide plate, a polytetrafluoroethylene insulating shell, a lead screw and nut seat, a hollow guide block, a smooth guide rod, a fixed guide block, an insulating back plate, a handle bearing seat, an inner fixing ring, a knob, a lead screw, a filter frame, a rubber sealing frame, a ring frame, a honeycomb rectifier plate, a coarse particle filter, a medium particle filter, a fine particle filter, and a nanoparticle filter, its structure is reasonable. The adjustment knob is also well-designed. In conjunction with the lead screw nut seat, the filter holder can be smoothly pulled out through the threaded drive. Simply rotate the knob to pick up or put down the filter, without disassembling the bolts, simplifying the operation to two steps. Moreover, the threaded drive has strong self-locking properties and high positioning accuracy of the filter holder (deviation ≤0.1mm), ensuring the accurate placement of each filter and guaranteeing full-spectrum sampling effect. Furthermore, the honeycomb rectifier plate and the arc-shaped buffer guide plate work together to sort the airflow to form a stable laminar flow, reducing mechanical collisions between particles and the air passage wall, filter, and sampling plate, avoiding shape deformation, and making it highly practical. Attached Figure Description

[0013] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a high-voltage electrostatic collection device for aerosol particles according to the present invention; Figure 2 This is a schematic diagram showing the disassembled structure of a high-voltage electrostatic collection device for aerosol particles according to the present invention. Figure 3 This is an enlarged schematic diagram of the filter frame structure of a high-voltage electrostatic collection device for aerosol particles according to this utility model; Figure 4 This is a schematic diagram of the knob connection structure of a high-voltage electrostatic collection device for aerosol particles according to this utility model; Figure 5 This is a schematic diagram of the disassembled structure of the smooth guide rod of the high-voltage electrostatic collection device for aerosol particles according to this utility model; Figure 6 This is a schematic diagram of the arc-shaped buffer guide plate structure of a high-voltage electrostatic collection device for aerosol particles according to this utility model.

[0014] In the diagram: 1-Control box, 2-Sampling air pump, 3-Sampling air hose, 4-Integrated insulating shell, 5-Grounding discharge wire, 6-Anode wire, 7-Cathode sampling wire, 8-Air inlet, 9-Arc-shaped buffer guide plate, 10-PTFE insulating shell, 11-Screw nut seat, 12-Hollow guide block, 13-Smooth guide rod, 14-Fixed guide block, 15-Insulating back plate, 16-Handle, 17-Bearing seat, 18-Inner fixing ring, 19-Knob, 20-Screw, 21-Filter frame, 22-Rubber sealing frame, 23-Ring frame, 24-Honeycomb rectifier plate, 25-Coarse particle filter, 26-Medium particle filter, 27-Fine particle filter, 28-Nano particle filter, 29-Tweezers groove, 30-Portable handle. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Please see Figures 1-6 This utility model provides a technical solution: a high-voltage electrostatic collection device for aerosol particles, including a control box 1, an integrated insulating shell 4, and an insulating back plate 15. A sampling pump 2 is installed on one side of the control box 1. An air inlet 8 is provided at the upper end of the integrated insulating shell 4, and an arc-shaped buffer guide plate 9 is installed inside the air inlet 8. A polytetrafluoroethylene (PTFE) insulating shell 10 is fixedly connected to the right side of the integrated insulating shell 4. A screw nut seat 11 and a hollow guide block 12 are respectively installed on the front and rear right sides of the PTFE insulating shell 10 by bolts. A bearing seat 17 and a fixed guide block 14 are respectively fixed at the front and rear ends of the insulating back plate 15. An inner fixing ring 18 is installed and fixed inside the bearing seat 17. A screw 20 is fixed inside the inner fixing ring 18, and a knob 19 is installed on the right end of the screw 20. The left end of the screw 20 passes through the screw nut seat 11 by a thread. The left end of the fixed guide block 14 is horizontally fixed. A smooth guide rod 13 slides through the hollow guide block 12. A rubber sealing frame 22 is fixed to the left edge of the insulating back plate 15, and the rubber sealing frame 22 is in close contact with the opening of the polytetrafluoroethylene insulating shell 10. Multiple filter frames 21 are horizontally installed on the left end of the insulating back plate 15. A ring frame 23 is provided on the upper left side of each of the multiple filter frames 21. A honeycomb rectifier plate 24, a coarse particle filter 25, a medium particle filter 26, a fine particle filter 27, and a nanoparticle filter 28 are horizontally clamped in the multiple ring frames 23 from top to bottom. The honeycomb rectifier plate 24, the coarse particle filter 25, the medium particle filter 26, the fine particle filter 27, and the nanoparticle filter 28 are all located in the integrated insulating shell 4. This design solves the problems of poor full-spectrum acquisition effect, easy destruction of particle properties, and poor operation convenience of the filter picking and placing structure of the existing high voltage electrostatic acquisition device.

[0017] As the first embodiment of this utility model: the sampling pump 2 is connected to the exhaust end of the lower end of the integrated insulating housing 4 through the sampling pump hose 3. The added sampling pump 2 provides stable negative pressure power to the air path, driving external air to enter the device through the air inlet 8, and pass through multiple filters and electric field areas in sequence to ensure the effective capture of aerosol particles. The sampling pump hose 3 has flexible and bendable characteristics, which can be adapted to the spatial layout of different installation scenarios, avoiding the installation restrictions caused by rigid pipe connections, and reducing the impact of pump vibration on the flow field stability inside the integrated insulating housing 4, indirectly ensuring the uniformity of particle deposition.

[0018] The integrated insulating housing 4 has an anode discharge needle assembly and a grounding sampling plate installed at its upper and lower ends, respectively. An anode wire 6 and a cathode sampling wire 7 are installed at the upper and lower ends of the side surface of the integrated insulating housing 4, respectively. A grounding discharge wire 5 is installed on the lower side of the integrated insulating housing 4. Through the cooperation of the added anode discharge needle assembly and the grounding sampling plate, a stable high-voltage electrostatic field is formed after the high-voltage power supply is connected. Electrostatic adsorption forces cause aerosol particles to detach from the airflow trajectory and deposit on the sampling plate, providing the core power for full-spectrum sampling. The anode wire 6 and the cathode sampling wire 7 serve as high-voltage transmission channels, ensuring a stable connection between the electric field unit and the control box 1, and achieving precise voltage control. The grounding discharge wire 5 provides an electrostatic discharge path for the device, preventing residual static electricity in the housing or sampling plate, protecting particles from electrostatic aggregation, and laying a safe foundation for subsequent handling operations.

[0019] The anode wire 6 is connected to the anode discharge needle assembly, and the cathode sampling wire 7 is connected to the grounding sampling plate. The other ends of both the anode wire 6 and the cathode sampling wire 7 are connected to the control box 1 via wires. A portable handle 30 is installed on the upper end of the control box 1. By directly connecting the added wires to the electric field unit, signal transmission loss is reduced, ensuring that the voltage parameters output by the control box 1 accurately act on the electric field, thereby achieving adjustment of the electric field strength corresponding to particles of different sizes. The portable handle 30 is ergonomically designed, making it easy for operators to carry the entire device, improving the portability of the equipment, and adapting to various application scenarios such as field testing and mobile monitoring, without the need for additional carrying tools.

[0020] The grounding discharge line 5 is connected to the grounding sampling plate. By connecting the grounding discharge line 5 to the grounding sampling plate, a dedicated electrostatic discharge circuit is formed. After sampling, the residual static electricity on the surface of the grounding sampling plate can be quickly discharged, avoiding secondary particle agglomeration or contamination caused by static electricity. At the same time, it eliminates the risk of electric shock when operators pick up and put down the sampling plate, enhancing operational safety. The grounding design can also stabilize the electric field potential, reduce external electromagnetic interference, and improve the stability of electrostatic collection and the accuracy of particle deposition.

[0021] A handle 16 is installed on the right end of the insulating back plate 15. When the filter frame 21 is pulled out by rotating the knob 19, the handle 16 can be used to assist in pushing and pulling the insulating back plate 15, making the pulling action smoother and less strenuous, and preventing the filter frame 21 from jamming or shifting due to uneven force. The handle 16 is made of insulating material, which can prevent the operator from contacting live parts and further ensure operational safety.

[0022] The honeycomb rectifier plate 24, the coarse particle filter 25, the medium particle filter 26, the fine particle filter 27, and the nanoparticle filter 28 all have tweezer grooves 29 at their front and rear ends. The added tweezer grooves 29 provide a precise gripping space for dedicated insulated tweezers. When picking up or putting down the filter, there is no need to touch the filter body or sampling area. You only need to hold the edge of the tweezer groove to complete the disassembly and assembly, avoiding contamination of the filter surface by hands or tools, and preventing filter deformation. This further protects the integrity of the filter structure and ensures that the particle interception effect is not affected.

[0023] As a second embodiment of this utility model: Before collecting aerosol particles, first confirm that the integrated insulating shell 4 and the polytetrafluoroethylene insulating shell 10 are undamaged, and that the rubber sealing frame 22 is not deformed; check that the anode wire 6, the cathode sampling wire 7, and the grounding discharge wire 5 are firmly connected without loosening or damage. Then, rotate the knob 19 clockwise, and through the threaded transmission of the lead screw 20 and the lead screw nut seat 11, drive the insulating back plate 15 to be pulled outward along the smooth guide rod 13 until the filter frame 21 is fully extended; use special insulating tweezers to insert the honeycomb rectifier plate 24, coarse particle filter 25, medium particle filter 26, fine particle filter 27, and nano particle filter 28 into the corresponding ring frame 23 in sequence through the tweezers groove 29, ensuring that the filter is flat and fits; then install the pre-treated external sampling plate onto the grounding sampling plate inside the integrated insulating shell 4. Then, grasp handle 16 and push the insulating backplate 15 while simultaneously rotating knob 19 counterclockwise to fully push the filter frame 21 into the integrated insulating housing 4 until the rubber sealing frame 22 is tightly fitted to the opening of the PTFE insulating housing 10, achieving an air circuit seal. Next, set the electric field voltage via control box 1; During sampling, the sampling pump 2 is activated via control box 1. External air enters through inlet 8, is initially circulated by the arc-shaped buffer guide plate 9, and then flows through the honeycomb rectifier plate 24 to form a stable laminar flow. The airflow passes through multiple filters, physically intercepting particles of the corresponding size. Simultaneously, the anodic discharge needle assembly and the grounded sampling plate form a high-voltage electrostatic field. Particles not completely intercepted by the filters are removed from the airflow trajectory under the action of electrostatic adsorption and are uniformly deposited on the surface of the external sampling plate, thus achieving full-spectrum sampling. After the set sampling time is reached, control box 1 is turned off, and the sampling pump 2 and the high-voltage electric field unit are simultaneously shut down. After waiting for 30 seconds, residual static electricity on the surface of the grounded sampling plate is naturally released through the grounding discharge line 5 to ensure no static electricity residue remains. Next, rotate knob 19 clockwise to pull out filter rack 21. Use insulated tweezers to remove each filter through tweezer groove 29. If the filter needs to be reused, put it into a dedicated cleaning container. If it needs to be replaced, replace it with a new filter. Then take out the sampling piece on the grounding sampling plate, put it into an inert sample box and seal it to avoid contamination.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-voltage electrostatic collection device for aerosol particles, comprising a control box (1), an integrated insulating housing (4), and an insulating backplate (15), characterized in that: A sampling air pump (2) is installed on one side of the control box (1). An air inlet (8) is provided on the upper end of the integrated insulating shell (4), and an arc-shaped buffer guide plate (9) is installed inside the air inlet (8). A polytetrafluoroethylene insulating shell (10) is fixedly connected to the right side of the integrated insulating shell (4). A screw nut seat (11) and a hollow guide block (12) are respectively installed on the front and rear right sides of the polytetrafluoroethylene insulating shell (10) by bolts. A bearing seat (17) and a fixed guide block (14) are respectively fixed on the front and rear ends of the insulating back plate (15). An inner fixing ring (18) is installed and fixed inside the bearing seat (17). A screw rod (20) is fixed inside the inner fixing ring (18), and a knob (19) is installed on the right end of the screw rod (20). The left end of the screw rod (20) passes through the screw nut seat (11) by thread. The left end of the fixed guide block (14) is horizontal. A smooth guide rod (13) is fixed and slides through the hollow guide block (12). A rubber sealing frame (22) is fixed on the left edge of the insulating back plate (15) and the rubber sealing frame (22) is in close contact with the opening of the polytetrafluoroethylene insulating shell (10). Multiple filter frames (21) are horizontally installed on the left end of the insulating back plate (15). A ring frame (23) is provided on the left side of the upper end of each of the multiple filter frames (21). A honeycomb rectifier plate (24), a coarse particle filter (25), a medium particle filter (26), a fine particle filter (27), and a nano particle filter (28) are horizontally clamped in the multiple ring frames (23) from top to bottom. The honeycomb rectifier plate (24), the coarse particle filter (25), the medium particle filter (26), the fine particle filter (27), and the nano particle filter (28) are all located in the integrated insulating shell (4).

2. The high-voltage electrostatic collection device for aerosol particles according to claim 1, characterized in that: The sampling pump (2) is connected to the exhaust end of the integrated insulating housing (4) via the sampling pump hose (3).

3. The high-voltage electrostatic collection device for aerosol particles according to claim 1, characterized in that: The integrated insulating housing (4) is provided with an anode discharge needle group and a ground sampling plate at the upper and lower ends of the interior. The anode wire (6) and the cathode sampling wire (7) are installed at the upper and lower ends of the side surface of the integrated insulating housing (4). A ground discharge wire (5) is installed on the lower side of the integrated insulating housing (4).

4. The high-voltage electrostatic collection device for aerosol particles according to claim 3, characterized in that: The anode wire (6) is connected to the anode discharge needle group, the cathode sampling wire (7) is connected to the ground sampling plate, and the other end of the anode wire (6) and the cathode sampling wire (7) are connected to the control box (1) through wires. The upper end of the control box (1) is equipped with a portable handle (30).

5. The high-voltage electrostatic collection device for aerosol particles according to claim 3, characterized in that: The grounding discharge line (5) is connected to the grounding sampling plate.

6. The high-voltage electrostatic collection device for aerosol particles according to claim 1, characterized in that: A handle (16) is installed on the right end of the insulating backplate (15).

7. The high-voltage electrostatic collection device for aerosol particles according to claim 1, characterized in that: The honeycomb rectifier plate (24), coarse particle filter (25), medium particle filter (26), fine particle filter (27) and nano particle filter (28) are all provided with tweezers grooves (29) at their front and rear ends.

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