Aerosol total dust and grading integrated sampling device

Abstract

The utility model relates to an aerosol particulate matter sampling technology, in particular to an aerosol total dust and grading integrated sampling device, which is used for solving the technical problem that the existing sampling equipment is inconvenient to use. The sampling device comprises a mounting seat, at least one graded sampling unit and at least one total dust sampling unit, the mounting seat comprises a top plate, a connecting piece and a bottom plate; the graded sampling unit comprises a graded filter, a first air inlet pipe, a first air outlet pipe and a first air extractor; the total dust sampling unit comprises a total dust filter, a second air inlet pipe, a second air outlet pipe and a second air extractor; air inlets of the first air inlet pipe and the second air inlet pipe are consistent in height, control valves are arranged on the first air outlet pipe and the second air outlet pipe respectively, and the control valves are installed on the bottom plate and used for controlling opening and closing of the corresponding air outlet pipes. Total dust sampling and graded sampling of high-temperature and high-pressure scene aerosol samples are achieved through one device, and therefore sampling is more convenient.

Description

Technical Field

[0001] The utility model relates to the aerosol particulate sampling technology, in particular to an integrated sampling device for total aerosol dust and classification. Background Art

[0002] An aerosol refers to a gaseous dispersion system composed of solid or liquid particles floating in a gas medium. Among them, the gas is the continuous phase, and the solid or liquid particles are the dispersed phase. An aerosol is a multiphase fluid composed of a continuous phase and a dispersed phase. Since the dispersed phase is composed of various solid or liquid particles with different particle sizes and properties, there are significant differences in the fluid states of the continuous phase (gas) and the diverse dispersed phases (solid or liquid particles) in the multiphase fluid.

[0003] In aerosol diffusion experiments in spaces involving high temperature and high pressure, the aerosol in the space is the main specimen for studying such diffusion experiments. Therefore, special sampling equipment is required to collect the aerosol in the experimental space for subsequent research. During the aerosol collection process, it is usually necessary to collect the total dust aerosol and the classified aerosol of different particle sizes in the space separately. The existing collection methods usually involve placing a total dust sampling device and a classification sampling device, and sampling is carried out separately by the two sampling devices. This sampling method can effectively obtain the corresponding samples, but the equipment used in the sampling process is relatively many, and the sampling process is not very convenient. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an integrated sampling device for total aerosol dust and classification, which is used to solve the technical problem of inconvenient use of existing sampling equipment. The utility model realizes the total dust sampling and classification sampling of aerosol samples in a sealed space with high temperature and high pressure through one device, so the sampling is more convenient.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] An integrated sampling device for total aerosol dust and classification is characterized in that:

[0007] It includes a mounting base, at least one classification sampling unit and at least one total dust sampling unit;

[0008] The mounting base includes a top plate, a connecting member and a bottom plate; the top plate and the bottom plate are connected by the connecting member and form a rectangular frame;

[0009] The grading sampling unit includes a grading filter, a first intake pipe, a first outlet pipe, and a first air extraction device; the grading filter is installed on the top plate, with the air inlet nozzle above the top plate and the air outlet nozzle below the top plate; the first intake pipe and the first outlet pipe are respectively connected to the air inlet nozzle and the air outlet nozzle of the grading filter; the first air extraction device is connected to the first outlet pipe;

[0010] The total dust sampling unit includes a total dust filter, a second intake pipe, a second outlet pipe, and a second air extraction device; the total dust filter is installed on the top plate, with the air inlet nozzle above the top plate and the air outlet nozzle below the top plate; the second intake pipe and the second outlet pipe are respectively connected to the air inlet nozzle and the air outlet nozzle of the total dust filter; the second air extraction device is connected to the second outlet pipe;

[0011] The air inlet ports of the first intake pipe and the second intake pipe are at the same height;

[0012] Control valves are respectively provided on the first outlet pipe and the second outlet pipe, and the control valves are installed on the bottom plate for controlling the opening and closing of the corresponding outlet pipes.

[0013] Further, an air intake control unit is further included;

[0014] The air intake control unit includes an air compressor, at least two solenoid valves, and at least two pneumatic ball valves corresponding to the solenoid valves one by one;

[0015] The number of the pneumatic ball valves is the sum of the numbers of the first intake pipe and the second intake pipe, and they are respectively installed on the corresponding first intake pipe and second intake pipe;

[0016] The solenoid valves are installed on the top plate through a base, and the air outlet holes are respectively connected to the corresponding pneumatic ball valves through air pipes; an air inlet hole is provided on the base, and the air inlet hole communicates with the air inlet holes of each solenoid valve;

[0017] The air compressor is installed outside the rectangular frame and is connected to the air inlet hole of the base through an air pipe.

[0018] Further, a first mass flow controller and a second mass flow controller are respectively installed on the bottom plate for controlling the air outlet flow;

[0019] The air inlet ends of the first mass flow controller are respectively connected to each first outlet pipe, and the air outlet end is connected to the first air extraction device;

[0020] The air inlet ends of the second mass flow controller are respectively connected to each second outlet pipe, and the air outlet end is connected to the second air extraction device.

[0021] Further, a pressure sensor is installed on the side wall of the air inlet nozzle of the grading filter for real-time monitoring of the air pressure entering the grading filter.

[0022] Further, it further includes a display device installed on the top plate, and the display device is respectively connected to the pressure sensor, the first mass flow controller, and the second mass flow controller, so as to facilitate the staff to observe the gas outlet flow rate and the inlet pressure.

[0023] Further, there are two of the classification filters; there are four of the total dust filters, and they can also be reasonably designed according to actual sampling requirements.

[0024] Further, both the first air extraction device and the second air extraction device are vacuum pumps.

[0025] Further, the first air extraction device, the second air extraction device, and the air compressor are installed on the same base, which is convenient for handling.

[0026] Further, each of the control valves is fixedly arranged side by side on the bottom plate, which is convenient for separately controlling the opening and closing of each first air outlet pipe and the second air outlet pipe.

[0027] Further, the classification filter is installed on the top plate by bolts; the total dust filter is installed on the top plate by a plurality of screw rods. By the installation heights of the classification filter and the total dust filter, the inlet heights of the first air inlet pipe and the second air inlet pipe are kept consistent, so as to keep the sampling consistency.

[0028] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0029] 1. The present utility model includes a mounting base, at least one classification sampling unit, and at least one total dust sampling unit. By integrating the classification sampling unit and the total dust sampling unit on the same mounting base, only one sampling device is needed to simultaneously perform the classification sampling and total dust sampling of aerosol samples in a high-temperature and high-pressure space, so the sampling process is more convenient.

[0030] 2. For the air intake control unit of the present utility model, the air source for opening the pneumatic ball valve is provided by the air compressor, and the opening and closing of the pneumatic ball valve are controlled by the solenoid valve, so as to precisely control the air intake volume of the corresponding first air inlet pipe or the second air inlet pipe.

[0031] 3. For the first mass flow controller and the second mass flow controller of the present utility model, the gas outlet flow rates of the first air outlet pipe and the second air outlet pipe can be controlled, so as to precisely control the sampling progress of the sample.

[0032] 4. For the pressure sensor of the present utility model, the air pressure entering the classification filter can be monitored in real time, so as to improve the sampling accuracy.

[0033] 5. The display device of the present utility model can facilitate the staff to observe the gas outlet flow rate and the inlet pressure in real time, and ensure the smooth progress of the sampling process.

[0034] 6. The first air extraction device, the second air extraction device and the air compressor of the present utility model are installed on the same base, thereby further improving the convenience of using the device. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0036] The reference numerals are as follows:

[0037] 1 - mounting seat, 11 - top plate, 12 - bottom plate, 13 - connecting member, 14 - base, 15 - first mass flow controller, 16 - second mass flow controller, 17 - display device; 2 - grading filter, 21 - first intake pipe, 22 - first outlet pipe, 23 - pressure sensor; 3 - total dust filter, 31 - second intake pipe, 32 - second outlet pipe; 4 - first air extraction device; 5 - second air extraction device; 6 - pneumatic ball valve; 7 - air compressor; 8 - control valve; 9 - solenoid valve; 10 - screw. Detailed Embodiments

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. In addition, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance.

[0039] Referring to Figure 1 , this embodiment provides an integrated aerosol total dust and grading sampling device, including a mounting seat 1, at least one grading sampling unit and at least one total dust sampling unit.

[0040] The mounting seat 1 includes a top plate 11, a connecting member 13 and a bottom plate 12; the top plate 11 and the bottom plate 12 are connected by the connecting member 13 and form a rectangular frame. In this embodiment, the connecting member 13 is four columns, and both ends of each column are respectively connected to the top plate 11 and the bottom plate 12.

[0041] The grading sampling unit includes a grading filter 2, a first intake pipe 21, a first outlet pipe 22 and a first air extraction device 4. The grading filter 2 is installed on the top plate 11 by bolts, and the air inlet nozzle is located above the top plate 11, and the air outlet nozzle is located below the top plate 11. The first intake pipe 21 and the first outlet pipe 22 are respectively connected to the air inlet nozzle and the air outlet nozzle of the grading filter 2; the first air extraction device 4 is connected to the first outlet pipe 22.

[0042] The total dust sampling unit includes a total dust filter 3, a second intake pipe 31, a second outlet pipe 32, and a second air extraction device 5. The total dust filter 3 is installed on the top plate 11 through three screws 10, with the air inlet nozzle above the top plate 11 and the air outlet nozzle below the top plate 11. The second intake pipe 31 and the second outlet pipe 32 are respectively connected to the air inlet nozzle and the air outlet nozzle of the total dust filter 3; the second air extraction device 5 is connected to the second outlet pipe 32.

[0043] During installation, the total dust filter 3 is fixed at the same height as the classification filter 2 through three screws 10, so that the air inlet heights of the first intake pipe 21 and the second intake pipe 31 are the same.

[0044] During use, the first intake pipe 21 and the second intake pipe 31 are docked into the space, the first air extraction device 4 and the second air extraction device 5 work, and the aerosol enters the classification filter 2 through the first intake pipe 21 respectively, and aerosol particles of different particle sizes are intercepted by the classification filter 2. Similarly, the aerosol will enter the total dust filter 3 through the second intake pipe 31, and the inhaled aerosol is intercepted by the total dust filter 3. In this way, the total dust sampling and classification sampling of aerosol samples in the space are realized by one device, so the sampling is more convenient.

[0045] In this embodiment, both the first air extraction device 4 and the second air extraction device 5 are vacuum pumps.

[0046] To improve the sampling efficiency, there are two classification filters 2 in this embodiment; there are four total dust filters 3. Specifically, the two classification filters 2 are arranged in the middle of the top plate 11, and the four total dust filters 3 are respectively arranged on both sides of the two classification filters 2 in pairs.

[0047] Control valves 8 are respectively provided on the first outlet pipe 22 and the second outlet pipe 32, and the control valves 8 are installed on the bottom plate 12 to control the opening and closing of the corresponding outlet pipes. In this embodiment, the control valves 8 are fixed side by side on the bottom plate 12, which is convenient to control the opening and closing of each first outlet pipe 22 and the second outlet pipe 32 separately.

[0048] To realize the control of the intake air, this embodiment further includes an intake air control unit. The intake air control unit includes an air compressor 7, at least two solenoid valves 9, and at least two pneumatic ball valves 6 corresponding to the solenoid valves one by one.

[0049] The number of pneumatic ball valves 6 is the sum of the numbers of the first intake pipe 21 and the second intake pipe 31, that is, one pneumatic ball valve 6 is installed on each of the first intake pipe 21 and the second intake pipe 31 respectively to control the opening and closing of the corresponding intake pipe.

[0050] The solenoid valve 9 is installed on the top plate 11 through the base 14 and is respectively connected to the corresponding pneumatic ball valve 6 through air pipes. The base 14 is provided with an air inlet hole, and this air inlet hole is communicated with the air inlet holes of each solenoid valve 9. The air compressor 7 is installed outside the rectangular frame body and is connected to the air inlet hole of the base 14 through an air pipe.

[0051] In this embodiment, six solenoid valves 9 are arranged side by side on the top plate 11 through the base 14. Each solenoid valve 9 is equipped with an air inlet hole and an air outlet hole. The base 14 is provided with an air inlet hole, and this air inlet hole is communicated with the air inlet holes of the six solenoid valves 9. The air compressor 7 is communicated with the air inlet hole of the base 14 through an air pipe. Each solenoid valve 9 has two air outlet holes, and both are connected to the corresponding pneumatic ball valve 6 through air pipes. During operation, the air compressor 7 operates to provide the air pressure required by the pneumatic ball valve 6, and the pneumatic ball valve 6 is opened. The aerosol in the space enters the corresponding filter through the corresponding air inlet pipe; when the pneumatic ball valve 6 is closed, the aerosol in the space cannot enter the corresponding filter. The solenoid valve 9 is used to control the on-off of the air pressure between the air compressor 7 and the pneumatic ball valve 6.

[0052] In order to control the outlet air flow rate, this embodiment further includes a first mass flow controller 15 and a second mass flow controller 16 respectively installed on the bottom plate 12.

[0053] The air inlet ends of the first mass flow controller 15 are respectively connected to each first outlet pipe 22, and the air outlet end is connected to the first air extraction device 4; the air inlet ends of the second mass flow controller 16 are respectively connected to each second outlet pipe 32, and the air outlet end is connected to the second air extraction device 5. Through the first mass flow controller 15 and the second mass flow controller 16, precise control of the outlet air flow rates of the first outlet pipe 22 and the second outlet pipe 32 is achieved.

[0054] There can be multiple first mass flow controllers 15 and second mass flow controllers 16 respectively, and each outlet pipe is connected to the corresponding mass flow controller; or one of each can be set, that is, the corresponding first outlet pipes 22 are integrated and then connected to the first mass flow controller 15, and the corresponding second outlet pipes 32 are integrated and then connected to the second mass flow controller 16.

[0055] In this embodiment, the second outlet pipes 32 of the four total dust filters 3 pass through their respective control valves 8 and then are integrated and connected to the second mass flow controller 16. The first outlet pipes 22 of the two classification filters 2 pass through their respective control valves 8 and then are integrated and connected to the first mass flow controller 15. Therefore, the second mass flow controller 16 is used to control the gas flow rate during the total dust sampling process, and the first mass flow controller 15 is used to control the gas flow rate during the classification sampling process.

[0056] In some embodiments, a pressure sensor 23 is installed on the side wall of the air inlet nozzle of the grading filter 2 to detect the air pressure of the sample when it enters the grading filter 2. To facilitate the staff to observe the flow rate and pressure, a display device 17 is installed on the top plate 11, and the display device 17 is respectively connected to the pressure sensor 23, the first mass flow controller 15 and the second mass flow controller 16.

[0057] In this embodiment, the first air extraction device 4, the second air extraction device 5 and the air compressor 7 are installed on the same base for easy handling.

[0058] Based on the above embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

Claims

1. An integrated sampling device for total dust and size - fractionated dust of aerosol, characterized in that: It includes a mounting base (1), at least one size - fractionated sampling unit and at least one total - dust sampling unit; The mounting base (1) includes a top plate (11), a connecting member (13) and a bottom plate (12); the top plate (11) and the bottom plate (12) are connected by the connecting member (13) to form a rectangular frame; The size - fractionated sampling unit includes a size - fractionated filter (2), a first intake pipe (21), a first outlet pipe (22) and a first air - pumping device (4); the size - fractionated filter (2) is installed on the top plate (11), with the intake nozzle above the top plate (11) and the outlet nozzle below the top plate (11); the first intake pipe (21) and the first outlet pipe (22) are respectively connected to the intake nozzle and the outlet nozzle of the size - fractionated filter (2); the first air - pumping device (4) is connected to the first outlet pipe (22); The total - dust sampling unit includes a total - dust filter (3), a second intake pipe (31), a second outlet pipe (32) and a second air - pumping device (5); the total - dust filter (3) is installed on the top plate (11), with the intake nozzle above the top plate (11) and the outlet nozzle below the top plate (11); the second intake pipe (31) and the second outlet pipe (32) are respectively connected to the intake nozzle and the outlet nozzle of the total - dust filter (3); the second air - pumping device (5) is connected to the second outlet pipe (32); The intake ports of the first intake pipe (21) and the second intake pipe (31) are at the same height; Control valves (8) are respectively provided on the first outlet pipe (22) and the second outlet pipe (32), and the control valves (8) are installed on the bottom plate (12) for controlling the opening and closing of the corresponding outlet pipes.

2. The integrated sampling device for total dust and size - fractionated dust of aerosol according to claim 1, characterized in that: It further includes an intake control unit; The intake control unit includes an air compressor (7), at least two solenoid valves (9), and at least two pneumatic ball valves (6) corresponding to the solenoid valves one by one; The number of the pneumatic ball valves (6) is the sum of the numbers of the first intake pipe (21) and the second intake pipe (31), and they are respectively installed on the corresponding first intake pipe (21) and second intake pipe (31); The solenoid valves (9) are installed on the top plate (11) through a base (14), and their air outlet holes are respectively connected to the corresponding pneumatic ball valves (6) through air pipes; an air inlet hole is provided on the base (14), and the air inlet hole communicates with the air inlet holes of each solenoid valve (9); The air compressor (7) is installed outside the rectangular frame and is connected to the air inlet hole of the base (14) through an air pipe.

3. The integrated sampling device for total dust and size - fractionated dust of aerosol according to claim 1 or 2, characterized in that: It further includes a first mass flow controller (15) and a second mass flow controller (16) respectively installed on the bottom plate (12); The intake end of the first mass flow controller (15) is respectively connected to each first outlet pipe (22), and the outlet end is connected to the first air - pumping device (4); The intake end of the second mass flow controller (16) is respectively connected to each second outlet pipe (32), and the outlet end is connected to the second air extraction device (5).

4. The integrated aerosol total dust and size-segregated sampling device according to claim 3, characterized in that: A pressure sensor (23) is installed on the side wall of the intake nozzle of the size-segregated filter (2).

5. The integrated aerosol total dust and size-segregated sampling device according to claim 4, characterized in that: It further includes a display device (17) installed on the top plate (11), and the display device (17) is respectively connected to the pressure sensor (23), the first mass flow controller (15) and the second mass flow controller (16).

6. The integrated aerosol total dust and size-segregated sampling device according to claim 5, characterized in that: There are two size-segregated filters (2); There are four total dust filters (3).

7. The integrated aerosol total dust and size-segregated sampling device according to claim 6, characterized in that: Both the first air extraction device (4) and the second air extraction device (5) are vacuum pumps.

8. The integrated aerosol total dust and size-segregated sampling device according to claim 2, characterized in that: The first air extraction device (4), the second air extraction device (5) and the air compressor (7) are installed on the same base.

9. The integrated aerosol total dust and size-segregated sampling device according to claim 8, characterized in that: Each of the control valves (8) is fixedly arranged side by side on the bottom plate (12).

10. The integrated aerosol total dust and size-segregated sampling device according to claim 9, characterized in that: The size-segregated filter (2) is installed on the top plate (11) by bolts; The total dust filter (3) is installed on the top plate (11) by a plurality of screws (10).

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