Online extraction and quantitative concentration device for atmospheric fine particulate matters

Abstract

The invention discloses an atmospheric fine particulate matter on-line extraction and quantitative concentration device, and relates to the technical field of environmental protection, the atmospheric fine particulate matter on-line extraction and quantitative concentration device comprises an ultrasonic pool, a particulate matter collection bottle fixedly installed at the center in the ultrasonic pool and a collision type PM2.5 filter arranged at the top of the particulate matter collection bottle, a dimethylacetamide solvent is stored in the particulate matter collection bottle, and the collision type PM2.5 filter is arranged at the top of the particulate matter collection bottle. The annular groove is formed in the top of the ultrasonic pool, and an annular piece is inserted into the annular groove in a sliding mode and used for increasing the overall volume of the ultrasonic pool; the two-way lead screw is arranged in the horizontal direction and rotationally arranged in the ultrasonic pool, and two nuts are connected to the two-way lead screw in a threaded and sleeving mode; by starting the motor, the two-way screw rod can rotate, so that the two nuts are close to each other in the arrangement direction of the guide rod, and the two rotating pieces are driven to rotate and push the annular piece to move upwards in the annular groove, so that the overall height of the ultrasonic pool is increased, the volume of the ultrasonic pool is conveniently increased, and the ultrasonic pool is suitable for machining of different specifications.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection technologies, and particularly to an on-line extraction and quantitative concentration device for atmospheric fine particulate matter. Background Art

[0002] Atmospheric particulate matter is the general term for various solid and liquid particulate substances existing in the atmosphere. All kinds of particulate substances are evenly dispersed in the air to form a relatively stable and huge suspension system. Among them, the widely concerned fine particulate matter, i.e., PM2.5, refers to particulate matter with an aerodynamic equivalent diameter less than or equal to 2.5 micrometers in the atmosphere. Since it can be inhaled into the human lungs, it is called respirable fine particulate matter. Its diameter is less than 1 / 20 of the thickness of a human hair, and most of it contains toxic substances such as heavy metals and aromatic compounds. In order to improve the efficiency of collecting and processing atmospheric fine particulate matter and reduce the labor intensity of personnel, an on-line extraction and quantitative concentration device for atmospheric fine particulate matter has emerged.

[0003] For example, the existing Chinese patent (Publication No.: CN220603385U) discloses an on-line extraction and quantitative concentration device for atmospheric fine particulate matter. This device can realize sampling of atmospheric fine particulate matter with an organic solvent as the medium, eliminating the complicated pretreatment processes such as cutting the traditional membrane sample, extracting with an organic solvent, ultrasonic treatment, and concentration, and reducing the loss of organic components during the sample processing.

[0004] However, the above-designed on-line extraction and quantitative concentration device for atmospheric fine particulate matter still has some problems in actual use. The volume of the ultrasonic bath of this on-line extraction and quantitative concentration device for atmospheric fine particulate matter is fixed, which makes it impossible to add too much dimethylacetamide solvent in the particulate matter collection bottle according to the needs of different specifications of processing. Therefore, its use limitations are relatively large.

[0005] Therefore, we have designed an on-line extraction and quantitative concentration device for atmospheric fine particulate matter to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an on-line extraction and quantitative concentration device for atmospheric fine particulate matter. By starting the motor, the bidirectional lead screw can be rotated, so that the two nuts approach each other along the direction set by the guide rod, and drive the two rotating parts to rotate while pushing the annular part to move upward in the annular groove, thereby increasing the overall height of the ultrasonic bath, and thus facilitating the increase of the volume of the ultrasonic bath, which is suitable for processing of different specifications, so as to solve the problems raised in the above background art.

[0007] To solve the above technical problems, an online extraction device for atmospheric fine particulate matter provided by the present invention includes an ultrasonic bath, a particulate matter collection bottle fixedly installed at the center inside the ultrasonic bath, and a collision-type PM2.5 filter disposed on the top of the particulate matter collection bottle. The particulate matter collection bottle stores dimethylacetamide solvent. It also includes,

[0008] An annular groove is opened at the top of the ultrasonic bath, and an annular member is slidably inserted therein to increase the overall volume of the ultrasonic bath;

[0009] A bidirectional lead screw is arranged horizontally and rotatably disposed inside the ultrasonic bath, and two nuts are threadedly sleeved thereon;

[0010] A motor is fixedly installed at one end of the rear side of the ultrasonic bath, and a drive shaft extends into the ultrasonic bath and is in transmission connection with one end of the bidirectional lead screw to drive the bidirectional lead screw to rotate;

[0011] There are two rotating members, which are symmetrically and rotatably disposed between the nut and the annular member.

[0012] Further, a mounting seat is fixedly installed on the top of the nut, a fixed seat is fixedly installed at the center of one side of the bottom of the annular member, and both ends of the rotating member are respectively rotatably disposed in the mounting seat and the fixed seat.

[0013] Further, a first pin shaft is disposed in the mounting seat, a second pin shaft is disposed in the fixed seat, and both ends of the rotating member are respectively rotatably sleeved on the first pin shaft and the second pin shaft, which can facilitate the rotational setting of both ends of the rotating member and avoid the problem of movement interference.

[0014] Further, a maintenance slot is opened on one side of the ultrasonic bath, a fixing port is opened inside the ultrasonic bath, the maintenance slot, the fixing port and the annular groove are communicated, the bidirectional lead screw is rotatably disposed in the maintenance slot, the nut is slidably connected in the maintenance slot, and the rotating member is slidably inserted in the fixing port, which is convenient for the rotating member to rotate inside the ultrasonic bath, convenient for rotatably installing the bidirectional lead screw inside the ultrasonic bath, and more convenient for personnel to perform maintenance through the maintenance slot when parts inside the ultrasonic bath are damaged.

[0015] Further, a guide rod is inserted into the nut, the guide rod is arranged horizontally, and both ends of the guide rod are fixedly installed in the maintenance slot, which can enable the two nuts to only slide along the direction set by the guide rod and avoid the problem of the nut rotating in place following the bidirectional lead screw.

[0016] Further, it further includes a sealing assembly. The sealing assembly includes an air pump, which is fixedly installed on one side of the top of the ultrasonic cell. An air delivery pipe is provided at the air delivery end of the air pump. An airbag is provided on one side of the annular member, and the airbag abuts against one side wall of the annular groove. The other end of the air delivery pipe is fixedly inserted into the top of the airbag. After the annular member is lifted, the air pump can be turned on to enable the air pump to suck external air into the airbag through the air delivery pipe, causing the airbag to expand and tightly abut against one side wall of the annular groove, which can improve the sealing performance of the particulate matter collection bottle and prevent the dimethylacetamide solvent from seeping into the annular groove.

[0017] Further, an anti-corrosion coating is provided on the outer surface of the airbag. The main function of applying the anti-corrosion coating on the airbag is to increase the durability and reliability of the airbag, prevent it from being corroded and damaged during long-term use or in a specific environment. The anti-corrosion coating may also have other beneficial properties, such as improving the airtightness, heat resistance or wear resistance of the airbag.

[0018] The present invention also provides a technical solution: an atmospheric fine particulate matter quantitative concentration device, which further includes a quantitative concentration assembly. The quantitative concentration assembly includes a fraction automatic supply and collection integrated pump, which is arranged on one side of the ultrasonic cell and is connected to the particulate matter collection bottle through a pipeline. A vacuum parallel concentrator and an automatic fraction collector are provided on one side of the fraction automatic supply and collection integrated pump. The fraction automatic supply and collection integrated pump, the vacuum parallel concentrator and the automatic fraction collector are sequentially connected through pipelines. Rubber pads are fixedly installed at the bottoms of the vacuum parallel concentrator and the automatic fraction collector. By providing rubber pads at the bottoms of the vacuum parallel concentrator and the automatic fraction collector, since rubber has a large friction force and also has a certain elasticity, it can not only improve the stability of the vacuum parallel concentrator and the automatic fraction collector during use, but also relieve vibration, thus contributing to noise reduction.

[0019] Compared with the prior art, the beneficial effects of the present invention are: by turning on the motor, the bidirectional lead screw can be rotated, so that the two nuts approach each other along the direction set by the guide rod, and drive the two rotating members to rotate and push the annular member to move upward in the annular groove, thereby increasing the overall height of the ultrasonic cell, and thus facilitating the increase of the volume of the ultrasonic cell, which is suitable for processing of different specifications.

[0020] Compared with the prior art, the beneficial effects of the present invention are: by turning on the air pump, the air pump can suck external air into the airbag through the air delivery pipe, causing the airbag to expand and tightly abut against one side wall of the annular groove, which can improve the sealing performance of the particulate matter collection bottle and prevent the dimethylacetamide solvent from seeping into the annular groove. Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of the whole exterior of the present invention;

[0022] Figure 2 Schematic diagram of the three-dimensional structure on the side of the present invention;

[0023] Figure 3 Schematic diagram of the three-dimensional structure of the ultrasonic pool of the present invention when viewed from the bottom and outside;

[0024] Figure 4 For the present invention Figure 3 Enlarged view of part A in

[0025] In the figure: 1. Ultrasonic pool; 2. Particulate matter collection bottle; 3. Collision type PM2.5 filter; 4. Annular groove; 5. Annular part; 6. Bidirectional lead screw; 7. Nut; 8. Motor; 9. Rotating part; 10. Mounting seat; 11. Fixed seat; 12. Maintenance slot; 13. Fixed opening; 14. Guide rod; 15. Air pump; 16. Air delivery pipe; 17. Airbag; 18. Automatic fraction supply and collection integrated pump; 19. Vacuum parallel concentrator; 20. Automatic fraction collector; 21. Rubber pad. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "coupling" and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] Please refer to Figures 1-4The present invention provides a technical solution: an online extraction device for atmospheric fine particles, comprising an ultrasonic pool 1, a particle collection bottle 2 fixedly installed in the center of the ultrasonic pool 1, and a collision-type PM2.5 filter 3 arranged on the top of the particle collection bottle 2, wherein the particle collection bottle 2 stores dimethylacetamide solvent, and further comprising,

[0030] The annular groove 4 is provided on the top of the ultrasonic pool 1, and a ring member 5 is slidably inserted inside the annular groove 4, which is used to increase the overall volume of the ultrasonic pool 1;

[0031] A bidirectional screw rod 6 is arranged in the horizontal direction and is rotatably arranged in the ultrasonic pool 1, and two nuts 7 are threadedly sleeved on the screw rod;

[0032] The motor 8 is fixedly mounted at one end of the rear side of the ultrasonic pool 1, and the driving shaft extends into the ultrasonic pool 1 and is transmission-connected to one end of the bidirectional screw 6, so as to drive the bidirectional screw 6 to rotate;

[0033] There are two rotating members 9, which are symmetrically rotatably arranged between the nut 7 and the ring member 5;

[0034] A mounting seat 10 is fixedly mounted on the top of the nut 7 , a fixing seat 11 is fixedly mounted at the center of one side of the bottom of the annular member 5 , and two ends of the rotating member 9 are rotatably disposed in the mounting seat 10 and the fixing seat 11 , respectively.

[0035] In specific implementation, when it is necessary to increase the volume of the ultrasonic pool 1, the motor 8 is turned on to rotate the bidirectional screw 6, so that the two nuts 7 are close to each other, and the two rotating parts 9 are driven to rotate while pushing the annular part 5 to move upward in the annular groove 4, thereby increasing the overall height of the ultrasonic pool 1, thereby facilitating the increase of the volume of the ultrasonic pool 1, and being suitable for processing of different specifications.

[0036] See also Figures 1-4 The mounting seat 10 is provided with a first pin shaft, the fixing seat 11 is provided with a second pin shaft, and the two ends of the rotating member 9 are respectively rotatably sleeved on the first pin shaft and the second pin shaft. The two ends of the rotating member 9 can be conveniently rotatably arranged to avoid the problem of motion interference.

[0037] See also Figures 1-4 A maintenance groove 12 is provided on one side of the ultrasonic pool 1, a fixing port 13 is provided inside the ultrasonic pool 1, the maintenance groove 12, the fixing port 13 and the annular groove 4 are connected, the bidirectional screw 6 is rotatably arranged in the maintenance groove 12, the nut 7 is slidably connected in the maintenance groove 12, and the rotating member 9 is slidably inserted in the fixing port 13. It is convenient to rotate the rotating member 9 in the ultrasonic pool 1, and it is also convenient to rotatably install the bidirectional screw 6 in the ultrasonic pool 1, and it is more convenient for personnel to repair through the maintenance groove 12 when parts in the ultrasonic pool 1 are damaged.

[0038] See alsoFigures 1-4 Inside the nut 7, a guide rod 14 is inserted. The guide rod 14 is arranged horizontally, and both ends of the guide rod 14 are fixedly installed in the maintenance groove 12. This can enable the two nuts 7 to only slide along the direction set by the guide rod 14, avoiding the problem that the nuts 7 rotate in place following the bidirectional lead screw 6.

[0039] Refer to Figures 1-4 It also includes a sealing assembly. The sealing assembly includes an air pump 15. The air pump 15 is fixedly installed on one side of the top of the ultrasonic cell 1. An air delivery pipe 16 is arranged at the air delivery end of the air pump 15. An airbag 17 is arranged on one side of the annular member 5. The airbag 17 abuts against one side wall inside the annular groove 4. The other end of the air delivery pipe 16 is fixedly inserted into the top of the airbag 17.

[0040] During specific implementation, on the basis of the above implementation, after the annular member 5 is lifted, the air pump 15 can be turned on, so that the air pump 15 sucks outside air into the airbag 17 through the air delivery pipe 16, causing the airbag 17 to expand and tightly abut against one side wall inside the annular groove 4, which can improve the sealing performance of the particulate matter collection bottle 2 and prevent the dimethylacetamide solvent from seeping into the annular groove 4.

[0041] Refer to Figures 1-4 An anticorrosive coating is applied on the outer surface of the airbag 17. The main function of applying the anticorrosive coating on the airbag 17 is to increase the durability and reliability of the airbag 17, prevent it from being corroded and damaged during long-term use or in a specific environment. The anticorrosive coating may also have other beneficial properties, such as improving the airtightness, heat resistance or abrasion resistance of the airbag 17.

[0042] Please refer to Figures 1-4 The present invention also provides a technical solution: An atmospheric fine particulate matter quantitative concentration device further includes a quantitative concentration assembly. The quantitative concentration assembly includes a fraction automatic supply and collection integrated pump 18. The fraction automatic supply and collection integrated pump 18 is arranged on one side of the ultrasonic cell 1 and is connected to the particulate matter collection bottle 2 through a pipeline. A vacuum parallel concentrator 19 and an automatic fraction collector 20 are arranged on one side of the fraction automatic supply and collection integrated pump 18. The fraction automatic supply and collection integrated pump 18, the vacuum parallel concentrator 19 and the automatic fraction collector 20 are sequentially connected through pipelines. Rubber pads 21 are fixedly installed at the bottoms of the vacuum parallel concentrator 19 and the automatic fraction collector 20. By arranging the rubber pads 21 at the bottoms of the vacuum parallel concentrator 19 and the automatic fraction collector 20, since rubber has a large friction force and also has a certain elasticity, it can not only improve the stability of the vacuum parallel concentrator 19 and the automatic fraction collector 20 during use, but also relieve vibration, thereby contributing to noise reduction.

[0043] In addition, for this on-line extraction and quantitative concentration device for atmospheric fine particulate matter, according to the above implementation and internal structure, its general principle is as follows: Fine particulate matter in the atmosphere is collected by the collision-type PM2.5 filter 3 and enters the particulate matter collection bottle 2, and then online extraction is carried out using dimethylacetamide organic reagent in the ultrasonic bath 1; the extracted sample reagent enters the vacuum parallel concentrator 19 through the fraction automatic supply and collection integrated pump 18, and then online quantitative concentration is carried out, and finally it enters the automatic fraction collector 20. The whole process realizes automated sampling, extraction, concentration and collection, greatly improves work efficiency and reduces sample loss. Since the particulate matter collection bottle 2, the collision-type PM2.5 filter 3, the fraction automatic supply and collection integrated pump 18, the vacuum parallel concentrator 19 and the automatic fraction collector 20 are all prior arts, no further elaboration will be made here.

[0044] Working principle: Before use, it is necessary to externally connect power supplies to all the electrical appliances involved in this on-line extraction and quantitative concentration device for atmospheric fine particulate matter, or install an electrical box in an area outside the ultrasonic bath 1 that does not interfere with the operation of other components, and then connect the electrical box to the electrical appliances through wires to supply power to them, thus ensuring the normal operation of its electrical appliances. Since externally connecting power supplies to electrical appliances and installing an electrical box for power supply are both prior arts and are not the problems to be solved in the background technology of this specification, no further explanation will be made here.

[0045] During use, when it is necessary to increase the volume of the ultrasonic bath 1, the motor 8 is turned on at this time, so that the bidirectional lead screw 6 rotates, causing the two nuts 7 to approach each other along the direction set by the guide rod 14, and driving the two rotating parts 9 to rotate and push the annular part 5 to move upward in the annular groove 4, thereby increasing the overall height of the ultrasonic bath 1, so as to conveniently increase the volume of the ultrasonic bath 1 and be suitable for processing of different specifications.

[0046] In addition, after the annular part 5 is raised, the air pump 15 can be turned on, so that the air pump 15 sucks outside air into the airbag 17 through the air delivery pipe 16, causing the airbag 17 to expand and tightly abut against one side wall in the annular groove 4, which can improve the sealing performance of the particulate matter collection bottle 2 and prevent the dimethylacetamide solvent from seeping into the annular groove 4.

[0047] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content by using the above-mentioned hints to make equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An on-line extraction device for atmospheric fine particulate matter, comprising an ultrasonic bath (1), a particulate matter collection bottle (2) fixedly installed at the center inside the ultrasonic bath (1), and a collision-type PM2.5 filter (3) arranged on the top of the particulate matter collection bottle (2). Dimethylacetamide solvent is stored in the particulate matter collection bottle (2), and it is characterized in that, Further included is a circular groove (4) opened at the top of the ultrasonic bath (1), and a circular member (5) is slidably inserted therein for increasing the overall volume of the ultrasonic bath (1); a bidirectional lead screw (6) arranged horizontally and rotatably arranged in the ultrasonic bath (1), and two nuts (7) are threadedly sleeved thereon; a motor (8) fixedly installed at one end of the rear side of the ultrasonic bath (1), and a drive shaft extends into the ultrasonic bath (1) and is in transmission connection with one end of the bidirectional lead screw (6) for driving the bidirectional lead screw (6) to rotate; two rotating members (9) symmetrically and rotatably arranged between the nut (7) and the circular member (5).

2. The online extraction device for atmospheric fine particulate matter according to claim 1, characterized in that: A mounting seat (10) is fixedly installed at the top of the nut (7), a fixing seat (11) is fixedly installed at the center of one side of the bottom of the circular member (5), and both ends of the rotating member (9) are respectively rotatably arranged in the mounting seat (10) and the fixing seat (11).

3. The on-line extraction device for atmospheric fine particulate matter according to claim 2, characterized in that: A first pin shaft is arranged in the mounting seat (10), a second pin shaft is arranged in the fixing seat (11), and both ends of the rotating member (9) are respectively rotatably sleeved on the first pin shaft and the second pin shaft.

4. The on-line extraction device for atmospheric fine particulate matter according to claim 2, characterized in that: An inspection groove (12) is opened on one side of the ultrasonic bath (1), a fixing port (13) is opened inside the ultrasonic bath (1), the inspection groove (12), the fixing port (13) and the circular groove (4) are communicated, the bidirectional lead screw (6) is rotatably arranged in the inspection groove (12), the nut (7) is slidably connected in the inspection groove (12), and the rotating member (9) is slidably inserted in the fixing port (13).

5. An on-line extraction device for atmospheric fine particulate matter according to claim 4, characterized in that: A guide rod (14) is inserted into the nut (7), the guide rod (14) is arranged horizontally, and both ends of the guide rod (14) are fixedly installed in the inspection groove (12).

6. The on-line extraction device for atmospheric fine particulate matter according to claim 1, characterized in that: Further included is a sealing assembly, the sealing assembly includes an air pump (15), the air pump (15) is fixedly installed on one side of the top of the ultrasonic bath (1), an air delivery pipe (16) is arranged at the air delivery end of the air pump (15), an air bag (17) is arranged on one side of the circular member (5), the air bag (17) abuts against one side wall inside the circular groove (4), and the other end of the air delivery pipe (16) is fixedly inserted into the top of the air bag (17).

7. An on-line extraction device for atmospheric fine particulate matter according to claim 6, characterized in that: An anti-corrosion coating is applied to the outer surface of the air bag (17).

8. An atmospheric fine particulate matter quantitative concentration device, characterized in that An online extraction device for atmospheric fine particulate matter having any one of the above-mentioned claims 1-7 further includes a quantitative concentration assembly, the quantitative concentration assembly includes a fraction automatic supply and collection integrated pump (18), the fraction automatic supply and collection integrated pump (18) is arranged on one side of the ultrasonic bath (1) and is connected to the particulate matter collection bottle (2) through a pipeline, a vacuum parallel concentrator (19) and an automatic fraction collector (20) are arranged on one side of the fraction automatic supply and collection integrated pump (18), the fraction automatic supply and collection integrated pump (18), the vacuum parallel concentrator (19) and the automatic fraction collector (20) are sequentially connected through pipelines, and rubber pads (21) are fixedly installed at the bottoms of the vacuum parallel concentrator (19) and the automatic fraction collector (20).

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