Ambient air nitrogen oxide sampling device

Abstract

The utility model relates to the technical field of nitrogen oxide sampling, in particular to an ambient air nitrogen oxide sampling device which comprises a collecting device body, an air pump is arranged in the collecting device body, and one end of an air inlet of the air pump is fixedly connected with an air inlet pipe. When the filter element needs to be cleaned, a push rod is pushed towards the direction of a connecting frame, the push rod drives a transmission rod to rotate, the transmission rod drives a connecting rod to move, the connecting rod drives a plug pin to move, the plug pin slides out of the inner side wall of an inserting block, at the moment, the connecting frame is pulled, the filter groove is pulled out of an inserting groove, and then the filter element is cleaned. During sampling, dust impurities in the air can be filtered in time, the impurities are prevented from influencing the chemical reaction between nitric oxide and absorption liquid, the accuracy of a detection result is guaranteed, the actual content of the nitric oxide in the air can be clearly reflected, the filtering device can be cleaned in time, and the sampling efficiency is improved. And the practicability is higher.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen oxide sampling technology, specifically to an ambient air nitrogen oxide sampling device. Background Technology

[0002] An ambient air nitrogen oxide sampling device is a device used to collect nitrogen oxides in ambient air. Nitrogen oxides are a class of compounds composed of nitrogen and oxygen, including nitric oxide (NO) and nitrogen dioxide (NO2). They are one of the main components of air pollution, which can lead to environmental problems such as acid rain, photochemical smog, greenhouse effect, and ozone layer depletion. They can also harm the human respiratory system, eyes, and skin. Sampling nitrogen oxides in the air is used to monitor and assess ambient air quality, as well as to understand the sources, distribution, and trends of nitrogen oxides. Solution absorption sampling is a commonly used method for sampling nitrogen oxides. It refers to the sampling method that uses the principle that nitrogen oxides in the air can be rapidly dissolved in an absorption liquid or can rapidly react chemically with the absorption liquid to collect nitrogen oxides in ambient air.

[0003] Chinese utility model patent with publication number CN220231158U discloses a nitrogen oxide absorption bottle, including an inlet pipe, a bottle body, a porous glass plate, a branch pipe, a buffer pipe, and an exhaust pipe. The top of the bottle body is provided with a circular hole, through which the inlet pipe passes. The inlet of the inlet pipe is located outside the bottle body, and the diameter of the inlet is larger than the diameter of the inlet pipe. The outlet of the inlet pipe is located inside the bottle body, and a porous glass plate is provided on the outlet.

[0004] However, when sampling nitrogen oxides in ambient air, especially outdoors, the air contains many dust impurities. During sampling, these impurities can enter the sampling bottle along with the air, potentially affecting the chemical reaction between nitrogen oxides and the absorption liquid, thus impacting the accuracy of the test results and failing to clearly reflect the actual content of nitrogen oxides in the air. Therefore, it is necessary to filter the sampled air and clean the filter device promptly to ensure the representativeness of the sample. To this end, an ambient air nitrogen oxide sampling device is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an ambient air nitrogen oxide sampling device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an ambient air nitrogen oxide sampling device, comprising a sampling device body, an air pump inside the sampling device body, an air inlet pipe fixedly connected to one end of the air pump's air inlet, an air outlet pipe fixedly connected to one end of the air pump's air outlet, a sampling bottle provided on the lower surface of the inner wall of the sampling device body, the sampling bottle containing an absorbent liquid, the air outlet pipe extending into the absorbent liquid, an air inlet groove connected to the upper end of the air inlet pipe, the air inlet groove being fixedly connected to the sampling device body, a slot provided on the right surface of the air inlet groove, and a filter groove slidably connected to the inner wall of the slot. A filter element is fixedly connected to the inner wall of the filter tank. A connecting frame is fixedly connected to the right surface of the filter tank. Rectangular rods are slidably connected to both ends of the connecting frame. Connecting rods are fixedly connected to the sides of the two rectangular rods that are far apart from each other. A spring is fixedly connected between the connecting rod and the outer wall of the connecting frame. A transmission rod is rotatably connected to the outer wall of the two connecting rods through a bearing. A push rod is rotatably connected to the outer wall of the two transmission rods through a bearing. A pin is welded to the sides of the two connecting rods that are close to each other. Two inserts are symmetrically welded to the outer wall of the air inlet slot. The outer wall of the pin is slidably connected to the inner wall of the insert.

[0007] As a further preferred embodiment of this technical solution: the left side wall of the collection bottle is connected to an exhaust pipe.

[0008] As a further preferred embodiment of this technical solution: a one-way valve is installed on the section of the exhaust pipe away from the collection bottle.

[0009] As a further preferred embodiment of this technical solution: two guide rods are fixedly connected to the left side wall of the push rod, and two guide cylinders are fixedly connected to the right surface of the connecting frame, with the outer side wall of the guide rod and the inner side wall of the guide cylinder being slidably connected.

[0010] As a further preferred embodiment of this technical solution: an installation plate is fixedly connected to the inner wall of the main body of the acquisition device, and the upper surface of the installation plate is fixedly connected to the lower surface of the air pump.

[0011] As a further preferred embodiment of this technical solution: the front surface of the acquisition device body is provided with an operation panel, and the front surface of the operation panel is provided with buttons and a display screen.

[0012] As a further preferred embodiment of this technical solution: a cover plate is hinged to the upper surface of the main body of the acquisition device, and a handle is welded to the upper surface of the cover plate.

[0013] As a further preferred embodiment of this technical solution: two connecting plates are symmetrically welded to the outer side wall of the main body of the acquisition device, and the upper surface of the connecting plates is provided with connecting holes.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention filters out airborne impurities through an air inlet groove and a filter element. When the filter element needs cleaning, push the push rod towards the connecting frame. The push rod drives the transmission rod to rotate, which in turn moves the connecting rod. The connecting rod then moves the pin, which slides out from the inner wall of the insert block. At this point, pull the connecting frame to pull the filter groove out of the slot, allowing for filter element cleaning. During sampling, this invention effectively filters out dust and impurities in the air, preventing impurities from affecting the chemical reaction between nitrogen oxides and the absorption liquid, ensuring the accuracy of the test results. It clearly reflects the actual nitrogen oxide content in the air and allows for timely cleaning of the filter device, making it more practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the main body of the data acquisition device in this utility model;

[0018] Figure 3 This is a schematic diagram of the air inlet groove in this utility model;

[0019] Figure 4 This is a schematic diagram of the filter tank in this utility model;

[0020] Figure 5 This is a schematic diagram of the push rod and transmission rod in this utility model.

[0021] In the diagram: 1. Collection device body; 2. Air pump; 3. Air inlet pipe; 4. Air outlet pipe; 5. Collection bottle; 6. Absorbent liquid; 7. Air inlet slot; 8. Slot; 9. Filter tank; 10. Filter element; 11. Connecting frame; 12. Rectangular rod; 13. Connecting rod; 14. Spring; 15. Transmission rod; 16. Push rod; 17. Pin; 18. Insert block; 19. Exhaust pipe; 20. One-way valve; 21. Guide rod; 22. Guide cylinder; 23. Mounting plate; 24. Operation panel; 25. Button; 26. Display screen; 27. Cover plate; 28. Handle; 29. ​​Connecting plate; 30. Connecting hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "equipment" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Please refer to all accompanying drawings in the specification. This utility model provides a technical solution: an ambient air nitrogen oxide sampling device, including a sampling device body 1. An air pump 2 is installed inside the sampling device body 1. An air inlet pipe 3 is fixedly connected to one end of the air pump 2's air inlet, and an air outlet pipe 4 is fixedly connected to one end of the air pump 2's air outlet. A sampling bottle 5 is provided on the lower surface of the inner wall of the sampling device body 1. The sampling bottle 5 contains an absorbent liquid 6. The air outlet pipe 4 extends into the absorbent liquid 6. An air inlet groove 7 is connected to the upper end of the air inlet pipe 3. The air inlet groove 7 is fixedly connected to the sampling device body 1. A slot 8 is opened on the right surface of the air inlet groove 7, and a filter groove 9 is slidably connected to the inner wall of the slot 8. A filter element 10 is fixedly connected to the inner wall of the filter tank 9. A connecting frame 11 is fixedly connected to the right surface of the filter tank 9. Rectangular rods 12 are slidably connected to both ends of the connecting frame 11. Connecting rods 13 are fixedly connected to the sides of the two rectangular rods 12 that are far apart from each other. A spring 14 is fixedly connected between the connecting rod 13 and the outer wall of the connecting frame 11. A transmission rod 15 is rotatably connected to the outer walls of the two connecting rods 13 through bearings. The same push rod 16 is rotatably connected to the outer walls of the two transmission rods 15 through bearings. A pin 17 is welded to the sides of the two connecting rods 13 that are close to each other. Two inserts 18 are symmetrically welded to the outer wall of the air intake slot 7. The outer wall of the pin 17 is connected to... The inner walls of the insert block 18 are slidably connected; external air is drawn into the air inlet slot 7 and the air inlet pipe 3 by the air pump 2, and then enters the absorption liquid 6 inside the collection bottle 5 through the air outlet pipe 4 for nitrogen oxide sampling. When the air passes through the air inlet slot 7, the internal impurity particles are filtered out by the filter element 10. The filter element 10 does not chemically react with nitrogen oxides. When the filter element 10 needs to be cleaned, the push rod 16 is pushed towards the connecting frame 11. The push rod 16 drives the transmission rod 15 to rotate, the transmission rod 15 drives the connecting rod 13 to move, and the connecting rod 13 drives the pin 17 to move. The pin 17 slides out from the inner wall of the insert block 18. At this time, the connecting rod 17 is pulled. Pull the filter tank 9 out of the slot 8 using the bracket 11 to clean the filter element 10. After cleaning, insert the filter tank 9 back into the slot 8 and push the push rod 16 towards the connecting bracket 11. The push rod 16 drives the transmission rod 15 to move, and the transmission rod 15 drives the connecting rod 13 to move. The connecting rod 13 drives the rectangular rod 12 to move while the spring 14 is stretched. When the pin 17 corresponds to the position of the insert block 18, release the push rod 16. At this time, the spring 14 rebounds and drives the connecting rod 13 to move. The connecting rod 13 drives the pin 17 to move, and the pin 17 slides to the inner wall of the insert block 18, thus completing the installation and fixing of the filter tank 9.

[0025] In this embodiment, specifically: the left side wall of the collection bottle 5 is connected to an exhaust pipe 19; when the absorption liquid 6 reacts chemically with nitrogen oxides, a certain amount of gas will be generated, which can be discharged through the exhaust pipe 19.

[0026] In this embodiment, specifically: a one-way valve 20 is installed on the section of the exhaust pipe 19 away from the collection bottle 5; to prevent backflow of air from affecting the sampling results.

[0027] In this embodiment, specifically: two guide rods 21 are fixedly connected to the left side wall of the push rod 16, and two guide cylinders 22 are fixedly connected to the right surface of the connecting frame 11. The outer side wall of the guide rod 21 and the inner side wall of the guide cylinder 22 are slidably connected; the movement direction of the push rod 16 is limited.

[0028] In this embodiment, specifically: an installation plate 23 is fixedly connected to the inner wall of the collection device body 1, and the upper surface of the installation plate 23 is fixedly connected to the lower surface of the air pump 2; this facilitates the installation and fixing of the air pump 2.

[0029] In this embodiment, specifically: the front surface of the acquisition device body 1 is provided with an operation panel 24, and the front surface of the operation panel 24 is provided with buttons 25 and a display screen 26.

[0030] In this embodiment, specifically: a cover plate 27 is hinged to the upper surface of the main body 1 of the acquisition device, and a handle 28 is welded to the upper surface of the cover plate 27.

[0031] In this embodiment, specifically: two connecting plates 29 are symmetrically welded to the outer side wall of the acquisition device body 1, and the upper surface of the connecting plate 29 is provided with a connecting hole 30; the connecting plate 29 can be connected to equipment such as a tripod.

[0032] The working principle of this utility model is as follows: External air is drawn into the air inlet sump 7 and air inlet pipe 3 by air pump 2, and then enters the absorbent liquid 6 inside the collection bottle 5 through the air outlet pipe 4 for nitrogen oxide sampling. When air passes through the air inlet sump 7, internal impurities are filtered out by filter element 10. Filter element 10 does not chemically react with nitrogen oxides. When filter element 10 needs cleaning, push rod 16 is pushed towards connecting frame 11. Push rod 16 drives transmission rod 15 to rotate, transmission rod 15 drives connecting rod 13 to move, and connecting rod 13 drives pin 17 to move. Pin 17 slides out from the inner wall of insert block 18. At this time, pull connecting frame 11 to pull filter tank 9 out of slot 8 for cleaning. After cleaning, filter tank 9 is reinserted into slot 8, and push rod 16 is pushed back into slot 8. The push rod 16 moves towards the connecting frame 11, the push rod 16 drives the transmission rod 15 to move, the transmission rod 15 drives the connecting rod 13 to move, and the connecting rod 13 drives the rectangular rod 12 to move while the spring 14 is stretched. When the pin 17 corresponds to the position of the insert block 18, the push rod 16 is released. At this time, the spring 14 rebounds and drives the connecting rod 13 to move. The connecting rod 13 drives the pin 17 to move, and the pin 17 slides to the inner wall of the insert block 18, thus completing the installation and fixation of the filter tank 9. This constitutes an ambient air nitrogen oxide sampling device. When sampling, it can filter dust and impurities in the air in a timely manner to prevent impurities from affecting the chemical reaction between nitrogen oxides and the absorption liquid 6, ensuring the accuracy of the test results. It can clearly reflect the actual content of nitrogen oxides in the air, and the filter device can be cleaned in time, making it more practical.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ambient air nitrogen oxide sampling device, comprising a sampling device body (1), characterized in that: The main body (1) of the collection device is equipped with an air pump (2). One end of the air pump (2) is fixedly connected to an air inlet pipe (3), and one end of the air pump (2) is fixedly connected to an air outlet pipe (4). The lower surface of the inner wall of the main body (1) of the collection device is equipped with a collection bottle (5). The collection bottle (5) is filled with an absorbent liquid (6). The air outlet pipe (4) extends into the absorbent liquid (6). The upper end of the air inlet pipe (3) is connected to an air inlet groove (7). The air inlet groove (7) is fixedly connected to the main body (1) of the collection device. The right surface of the air inlet groove (7) is provided with a slot (8). The inner wall of the slot (8) is slidably connected to a filter groove (9). The inner wall of the filter groove (9) is fixedly connected to a filter element (10). A connecting frame (11) is fixedly connected to the right surface of the air intake slot (7). Rectangular rods (12) are slidably connected to both ends of the connecting frame (11). A connecting rod (13) is fixedly connected to the side of the two rectangular rods (12) that are far apart from each other. A spring (14) is fixedly connected between the connecting rod (13) and the outer wall of the connecting frame (11). A transmission rod (15) is rotatably connected to the outer wall of the two connecting rods (13) through a bearing. The same push rod (16) is rotatably connected to the outer wall of the two transmission rods (15) through a bearing. A pin (17) is welded to the side of the two connecting rods (13) that are close to each other. Two inserts (18) are symmetrically welded to the outer wall of the air intake slot (7). The outer wall of the pin (17) is slidably connected to the inner wall of the insert (18).

2. The ambient air nitrogen oxide sampling device according to claim 1, characterized in that: The left side wall of the collection bottle (5) is connected to an exhaust pipe (19).

3. The ambient air nitrogen oxide sampling device according to claim 2, characterized in that: A one-way valve (20) is installed on the section of the exhaust pipe (19) away from the collection bottle (5).

4. The ambient air nitrogen oxide sampling device according to claim 2, characterized in that: Two guide rods (21) are fixedly connected to the left side wall of the push rod (16), and two guide cylinders (22) are fixedly connected to the right surface of the connecting frame (11). The outer side wall of the guide rod (21) is slidably connected to the inner side wall of the guide cylinder (22).

5. The ambient air nitrogen oxide sampling device according to claim 2, characterized in that: An installation plate (23) is fixedly connected to the inner wall of the main body (1) of the acquisition device, and the upper surface of the installation plate (23) is fixedly connected to the lower surface of the air pump (2).

6. The ambient air nitrogen oxide sampling device according to claim 2, characterized in that: The front surface of the main body (1) of the acquisition device is provided with an operation panel (24), and the front surface of the operation panel (24) is provided with buttons (25) and a display screen (26).

7. The ambient air nitrogen oxide sampling device according to claim 6, characterized in that: The upper surface of the main body (1) of the acquisition device is hinged with a cover plate (27), and a handle (28) is welded to the upper surface of the cover plate (27).

8. The ambient air nitrogen oxide sampling device according to claim 6, characterized in that: Two connecting plates (29) are symmetrically welded to the outer side wall of the main body (1) of the acquisition device, and a connecting hole (30) is provided on the upper surface of the connecting plate (29).

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