CN211122177U

CN211122177U - Air suspended particulate matter sampling device

Info

Publication number: CN211122177U
Application number: CN201921781244.2U
Authority: CN
Inventors: 何正荣
Original assignee: Chongqing Tianke Testing Technology Co ltd
Current assignee: Chongqing Tianke Testing Technology Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-07-28
Anticipated expiration: 2029-10-22

Abstract

The utility model relates to an air suspended particles sampling device relates to environmental monitoring sampling equipment field, including the box, the box roof even has air inlet mechanism, and the box is inside to be fixed with negative pressure mechanism, and negative pressure mechanism includes the air pump, and the air pump is equipped with the gas outlet, air inlet mechanism is including passing the box roof and the intake pipe that links to each other with negative pressure mechanism, and the other end of intake pipe is connected with communicating pipe, and communicating pipe includes that a plurality of divides the pipe, divides the pipe to keep away from the one end of intake pipe and is connected with branch intake pipe, and branch intake pipe end connection has the sampling head, and the filter membrane has been. The utility model discloses can gather a plurality of samples simultaneously, when same monitoring site needs the certain time quantum of interval to gather the sample, the user only needs to sample through switching sampling head valve selectivity, easy operation, and efficiency is higher.

Description

Air suspended particulate matter sampling device

Technical Field

The utility model belongs to the technical field of environmental monitoring sampling equipment and specifically relates to an air suspended particles sampling device is related to.

Background

With the continuous advance of industrialization, air pollution is becoming more serious, and total suspended particles refer to all particles which are suspended in the atmosphere and are not easy to settle, including various solid particles, liquid particles and the like, and the diameter is usually between 0.1 and 100 microns. The salt-type air purification device mainly comes from smoke dust generated during fuel combustion, dust generated in the production and processing process, building and traffic dust, wind and sand dust and gaseous pollutants, and corresponding salt particles generated in the air through complex physical and chemical reactions, wherein the particles contain a large amount of impurity substances, and are many toxic substances which can harm human bodies.

The utility model discloses a utility model patent that bulletin number is CN205749045U discloses a portable dust sampler, including handle, filter membrane, operating button and alarm control valve, even have the casing on hand, the siren is equipped with in the outside of casing, and the left side of casing is fixed with the sampling head, has the filter membrane in the sampling head, and the display screen right side is fixed with the flowmeter, and the flowmeter top is equipped with adjust knob, and power source is installed to the air exit below, and casing internal fixation has the aspiration pump. The portable dust sampler has small volume and is convenient to use; the sound insulation layer device is arranged in the shell, so that the noise is low; the air exit is equipped with the dust cover, is difficult for getting into the dust, and measured data is accurate, the higher advantage of work efficiency.

However, the above prior art solutions have the following drawbacks: the portable dust sampler can only collect one sample at a time, and when a plurality of samples are collected at the same monitoring site at certain time intervals, a user has to repeatedly open the sampling head to replace the filter membrane inside, so that the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an air suspension particulate matter sampling device, including a plurality of sampling heads, can gather a plurality of samples simultaneously, when same monitoring point needs interval certain time quantum to gather a plurality of samples, the user only needs when gathering next time quantum sample, and the sampling head valve of closing previous time quantum lets its stop work after, open again next on the sampling head cover and the valve let its begin work can, easy operation, efficiency is higher.

The utility model discloses the purpose can be realized through following technical scheme:

the utility model provides an air suspended particles sampling device, includes the box, and the box roof even has air intake mechanism, and the box is inside to be fixed with negative pressure mechanism, and negative pressure mechanism includes the air pump, and the air pump is equipped with the gas outlet, air intake mechanism is including passing the box roof and the intake pipe that links to each other with negative pressure mechanism, and the other end of intake pipe is connected with communicating pipe, and communicating pipe includes that a plurality of divides the pipe, divides the pipe to keep away from the one end of intake pipe and is connected with branch intake pipe, divides intake pipe end connection to have the sampling head, and the.

Through adopting above-mentioned technical scheme, a plurality of is in charge of and is connected with a plurality of sampling head for several parallel samples can be gathered simultaneously to air suspension particulate matter sampling device, supplies measurement personnel analysis to detect, has improved the accuracy of work efficiency and data.

The utility model discloses further set up to: valves are respectively arranged on the branch pipes.

By adopting the technical scheme, the sampling head can be selectively used for collecting samples through opening and closing the valve, and the number of the samples is controlled according to the requirement; on the other hand when the air quality of different time quantums need to be monitored, can realize through the valve switching that different sampling heads gather the sample at different stages and need not open the filter membrane that the sampling head traded the inside at the monitoring scene, realize the continuity sampling to reduce the degree of the pollution that the filter membrane received at the monitoring scene.

The utility model discloses further set up to: the sampling head is cylindric that one end open-ended, and the sampling head inner wall is provided with the spacing platform that a plurality of is used for placing the filter membrane, and the sampling head internal diameter reduces from the opening end to the other end step by step.

Through adopting above-mentioned technical scheme, can place the filter membrane according to the aperture gradient on the spacing bench of a plurality of, gather the suspended particles thing of different particle diameters simultaneously, if: total suspended particulate matter (TSP), inhalable particulate matter (PM 10), fine dust particulate matter (PM 2.5), and the like, further improving the working efficiency.

The utility model discloses further set up to: the box body is positioned on the side wall opposite to the air outlet and is provided with a plurality of air exhaust holes, a plurality of air blocking sheets are fixedly arranged between the air outlet and the air exhaust holes, and an air flow channel is formed between every two adjacent air blocking sheets.

Through adopting above-mentioned technical scheme, the air blocking piece can reduce the air current and directly spout the velocity of flow for the filterable air of exhaust process among the buffering negative pressure mechanism forms and flows around and reduces its velocity of flow, when making it get into ambient air through the exhaust hole, can not stir the ambient air around the sampling head too greatly, reduces the degree of dilution of the ambient air that the gas outlet exhaust was to originally gathering.

The utility model discloses further set up to: the cross section of the air baffle is arc-shaped, and the notch of the air baffle faces the air outlet.

By adopting the technical scheme, when the air flow sprayed from the air outlet reaches the air baffle sheet, the air flow flows back to form opposite impact due to the arc design, so that the speed reduction effect is improved.

The utility model discloses further set up to: the sampling head is connected with the branch pipe through threads.

Through adopting above-mentioned technical scheme, threaded connection can dismantle, when the sampling head damages, can take off the change, secondly, is convenient for take off the sampling head and packs into the filter membrane, and it is more convenient to operate.

The utility model discloses further set up to: the open end of sampling head can be dismantled and be connected with and can cover open covering.

Through adopting above-mentioned technical scheme, cover and shelter from the open end of sampling, prevent to bleed the debris of in-process top and be inhaled the influence sampling.

The utility model discloses further set up to: the negative pressure mechanism comprises a plurality of air pumps connected in series.

Through adopting above-mentioned technical scheme, the air pump suction of establishing ties is bigger, is favorable to the air admission air suspended particles sampling device that awaits measuring, increases filter speed, further improves work efficiency.

To sum up, the utility model discloses a beneficial technological effect does:

1. the air suspended particulate sampling device can simultaneously collect a plurality of parallel samples for analysis and detection of detection personnel, so that the working efficiency is improved, and the accuracy of data is also improved;

2. the number of samples is controlled by opening and closing the valve, when the air quality in different time periods needs to be monitored, different sampling heads can collect samples in different stages without opening the sampling heads on a monitoring site to replace filter membranes in the sampling heads, and therefore the pollution degree of the filter membranes on the monitoring site is reduced;

3. filter membranes can be placed on the limiting tables according to the pore diameter gradient, and suspended particles with different particle diameters are collected, so that the working efficiency is further improved;

4. the wind-break piece buffers the filtered air discharged from the negative pressure mechanism, reduces the flow rate of the air, does not greatly stir the ambient air around the sampling head when the air enters the ambient air through the exhaust hole, and reduces the dilution degree of the air discharged from the air outlet to the ambient air to be collected originally.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is an exploded view of the present embodiment;

FIG. 3 is a schematic partial cross-sectional view of A-A of FIG. 1;

fig. 4 is an enlarged schematic view of part B of fig. 3.

Reference numerals: 1. a box body; 11. an exhaust hole; 12. a gas barrier sheet; 2. an air intake mechanism; 21. an air inlet pipe; 22. a four-way pipe; 221. pipe distribution; 2211. a valve; 23. a gas inlet pipe; 24. a sampling head; 241. a limiting table; 242. filtering the membrane; 2421. a first filter membrane; 2422. a second filter membrane; 2423. a third filter membrane; 243. covering; 2431. inserting a column; 2432. a jack; 25. an air intake passage; 3. a negative pressure mechanism; 31. an air pump; 311. and an air outlet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the utility model discloses an air suspended particulate matter sampling device, including the box 1 of cuboid form, 1 roof of box even has air intake mechanism 2, and 1 internal fixation of box has negative pressure mechanism 3.

Referring to fig. 1 and 2, the air intake mechanism 2 includes an air intake pipe 21 passing through the top wall of the box 1 and connected to the negative pressure mechanism 3, the other end of the air intake pipe 21 is connected to a four-way pipe 22, the four-way pipe 22 includes four branch pipes 221, valves 2211 are respectively arranged on the branch pipes 221, the other ends of the branch pipes 221 are respectively and vertically connected to branch air pipes 23, and the other ends of the branch air pipes 23 are respectively connected to the same sampling heads 24.

Referring to fig. 3 and 4, the sampling head 24 is a cylindrical tube with an open end, the hollow inside of the sampling head 24 is provided with a limiting table 241 for placing the filter membrane 242 on the inner wall, the limiting table 241 can be provided with a plurality of ones, so that the inside of the sampling head 24 is gradually reduced towards the air inlet pipe 21, and the first filter membrane 2421, the second filter membrane 2422 and the third filter membrane 2423 with different apertures can be conveniently placed according to the aperture gradient for simultaneously collecting suspended particles with different particle sizes, such as: total suspended particulate matter (TSP), inhalable particulate matter (PM 10), fine dust particulate matter (PM 2.5) and the like, and the working efficiency is improved.

Referring to fig. 3 and 4, a cylindrical cover 243 with one open end is detachably connected to one open end of the sampling head 24, a cylindrical insertion column 2431 is fixed to the end edge of the open end of the sampling head 24, an insertion hole 2432 matched with the insertion column 2431 is formed in the end edge of the cover 243, and the cover 243 and the sampling head 24 are connected with the insertion hole 2432 through the insertion column 2431 to form an air inlet channel 25 so that air can enter the sampling head 24.

Referring to fig. 3, the negative pressure mechanism 3 includes an air pump 31 connected to the air inlet pipe 21, the air pump 31 is fixed to the bottom wall of the case 1, and an air outlet 311 is formed at one end of the air pump 31 for discharging air from the air pump 31. The air pumps 31 can be connected in series to enhance the working efficiency of the negative pressure mechanism 3; the air pump 31 may be a blower or the like having equivalent functions.

Referring to fig. 2 and 3, a wall of the case 1 facing the air outlet of the air pump 31 is provided with a plurality of air vents 11 for discharging filtered air out of the case 1. A plurality of air blocking sheets 12 are arranged between the exhaust hole 11 and the air outlet 311 of the air pump 31, two ends of each air blocking sheet 12 are respectively connected to two side walls of the box body 1 adjacent to the exhaust hole 11, the cross section of each air blocking sheet 12 is arc-shaped, the concave side faces the air outlet 311 and is used for buffering the filtered air discharged from the air outlet 311, the streaming flow is formed to reduce the flow speed of the air, when the air enters the ambient air through the exhaust hole 11, the ambient air around the sampling head 24 cannot be greatly stirred, and the dilution influence of the gas discharged from the air outlet 311 on the ambient air to be collected is reduced.

The specific use mode of the embodiment is as follows: before use, a user opens the cover 243 on each sampling head 24, places filter membranes 242 with different pore diameters on each limiting table 241 according to different requirements, and covers the cover 243. The air suspended particulate matter sampling device is conveyed to a monitoring site, a corresponding valve 2211 is opened, a negative pressure mechanism 3 is started, and the air suspended particulate matter sampling device starts to work; after sampling is completed, the corresponding valve 2211 is closed, and the negative pressure mechanism is closed. If samples in different time periods need to be collected, the valve 2211 is closed after the collection of the samples in the first time period is finished, the valve 2211 of the other sampling head 24 is opened, and the sampling is continued.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an air suspended particles sampling device, includes box (1), and box (1) roof even has air inlet mechanism (2), and box (1) inside is fixed with negative pressure mechanism (3), and negative pressure mechanism (3) include air pump (31), and air pump (31) are equipped with gas outlet (311), its characterized in that: air inlet mechanism (2) are including passing box (1) roof and intake pipe (21) that link to each other with negative pressure mechanism (3), and the other end of intake pipe (21) is connected with communicating pipe, and communicating pipe includes that a plurality of is in charge of (221), and the one end of keeping away from intake pipe (21) in charge of (221) is connected with branch trachea (23), and branch trachea (23) end connection has sampling head (24), and filter membrane (242) have been placed to sampling head (24) inside cavity.

2. The airborne particulate matter sampling apparatus of claim 1, wherein: valves (2211) are respectively arranged on the branch pipes (221).

3. The airborne particulate matter sampling apparatus of claim 2, wherein: sampling head (24) are one end open-ended cylindricly, and sampling head (24) inner wall is provided with a plurality of and is used for placing spacing platform (241) of filter membrane (242), and sampling head (24) internal diameter reduces from the open end to the other end step by step.

4. The airborne particulate matter sampling apparatus of claim 3, wherein: the box body (1) is located on the side wall opposite to the gas outlet (311) and is provided with a plurality of exhaust holes (11), a plurality of gas blocking sheets (12) are fixedly arranged between the gas outlet (311) and the exhaust holes (11) of the box body (1), and an air flow channel is formed between every two adjacent gas blocking sheets (12).

5. The airborne particulate matter sampling apparatus of claim 4, wherein: the section of the air baffle sheet (12) is arc-shaped, and the notch of the air baffle sheet (12) faces the air outlet (311).

6. The airborne particulate matter sampling apparatus of claim 1, wherein: the sampling head (24) is in threaded connection with the branch pipe (221).

7. The airborne particulate matter sampling apparatus of claim 3, wherein: the open end of the sampling head (24) is detachably connected with a cover (243) capable of covering the open end.

8. The airborne particulate matter sampling apparatus of claim 1, wherein: the negative pressure mechanism (3) comprises a plurality of air pumps (31) which are connected in series.