Continuous ozone sampling device

Abstract

The utility model provides a continuous ozone sampling device. The continuous ozone sampling device comprises an air extractor, a central sampling head, an edge sampling head and a sampling chamber, a funnel-shaped air exhaust inner isolation sleeve is arranged in the sampling chamber; the sampling chamber is divided into a central sampling chamber and an edge sampling chamber by the air exhaust inner isolation sleeve; the air extractor is arranged at the tail end of the sampling chamber; the central sampling head is connected to one end of the sampling chamber without the air extractor, and the edge sampling head is arranged on the side wall of one end of the sampling chamber close to the air extractor. The air exhaust device exhausts air, a negative pressure space is formed in the central sampling chamber, and a large amount of air enters the central sampling chamber from the central sampling head, so that a large amount of samples are collected; air in the edge sampling chamber is extracted from the periphery of the air extractor interface to form a negative pressure space, and a small amount of gas enters the edge sampling chamber from the edge sampling head to realize collection of a small amount of gas sample. The problems that an existing ozone sampler is low in sampling efficiency and small in application range are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of atmospheric sampling, and particularly relates to an ozone continuous sampling device. Background Art

[0002] Ozone is an important air pollutant, which has potential hazards to human health and the ecological environment. Therefore, the monitoring and control of ozone in ambient air are of great significance. Ozone gas is mainly generated by the photochemical reaction of pollutants such as anthropogenic emissions of nitrogen oxides (NOx) and volatile organic substances (VOSs). These pollutants undergo complex photochemical reactions under sunlight irradiation to generate ozone.

[0003] The existing ozone sampler has only one sampling head to sample ozone gas in the air, and can only perform single sampling. On the one hand, the sampling efficiency is low and the sampling range is small; on the other hand, in many cases, large gas volume sampling is required, and in many cases, small gas volume sampling is required, so the traditional sampling equipment cannot complete the above work. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an ozone continuous sampling device to solve the problems of inconvenient sampling and low sampling efficiency of the existing ozone sampler.

[0005] The utility model provides an ozone continuous sampling device, which includes: an air extraction device, a central sampling head, an edge sampling head and a sampling chamber;

[0006] The sampling chamber is a tubular structure with a hollow interior. An air extraction inner isolation sleeve is arranged inside the sampling chamber, and the air extraction inner isolation sleeve is in a funnel shape; the air extraction inner isolation sleeve divides the sampling chamber into a central sampling chamber and an edge sampling chamber, wherein the inner tube space of the air extraction inner isolation sleeve is the central sampling chamber, and the clamping space between the outside of the air extraction inner isolation sleeve and the inner wall of the sampling chamber is the edge sampling chamber;

[0007] The end with a larger diameter of the air extraction inner isolation sleeve is connected to the inner wall of the central sampling head at the front end, and the end with a smaller diameter of the air extraction inner isolation sleeve is communicated with an interface of the air extraction device; the edge sampling chamber is communicated with the air extraction device through another interface;

[0008] The air extraction device is arranged at the tail end of the sampling chamber;

[0009] The central sampling head is connected to one end of the sampling chamber where the air extraction device is not arranged, the central sampling head is communicated with the central sampling chamber, the edge sampling head is arranged on the side wall of the sampling chamber near the air extraction device end, and is communicated with the inner cavity of the edge sampling chamber.

[0010] Furthermore, the central sampling head includes a plurality of sampling head branches;

[0011] The outlet ends of multiple sampling head branches are interconnected to form the outlet end of the central sampling head. The multiple sampling head branches extend from the outlet end of the central sampling head to the surroundings, and the inlet ends of the multiple sampling head branches fold back towards the outlet end of the central sampling head.

[0012] Further, an inlet tank is provided at the inlet end of the sampling head branch. One end of the inlet tank is connected to the inlet end of the sampling head branch, the other end of the inlet tank is closed, and a louver-shaped air inlet is provided on the side wall of the inlet tank.

[0013] Further, the multiple sampling head branches are arranged in a circular pattern around the outlet end of the central sampling head, and the spacing between adjacent sampling head branches is equal.

[0014] Further, the diameter of the middle position of the sampling chamber is larger than the diameter of the end of the sampling chamber connected to the central sampling head, and a central sampling membrane is provided at the middle position of the sampling chamber.

[0015] Further, the middle position of the sampling chamber is set as a sample storage bin, the diameter of the sample storage bin is larger than the diameter of the middle position of the sampling chamber, and the central sampling membrane is arranged inside the sample storage bin.

[0016] Further, a plurality of edge sampling heads are provided on the side wall of the sampling chamber near the air extraction device, and the plurality of edge sampling heads are evenly distributed in a circular pattern around the side wall of the sampling chamber.

[0017] Further, the edge sampling head is detachably connected to the side wall of the sampling chamber, and a fine sampling membrane is provided at one end of the edge sampling head connected to the side wall of the sampling chamber.

[0018] Further, a sealing ring is sleeved outside the connection part of the edge sampling head and the side wall of the sampling chamber.

[0019] Further, the central sampling head is detachably connected to the sampling chamber.

[0020] Adopting the above technical solutions, compared with the prior art, the beneficial effects of the present utility model are:

[0021] The ozone continuous sampling device provided by the present utility model includes: an air extraction device, a central sampling head, an edge sampling head, and a sampling chamber;

[0022] The sampling chamber is a tubular structure with a hollow interior. An air extraction inner isolation sleeve is arranged inside the sampling chamber, and the air extraction inner isolation sleeve is in a funnel shape; the air extraction inner isolation sleeve divides the sampling chamber into a central sampling chamber and an edge sampling chamber, wherein the inner tube space of the air extraction inner isolation sleeve is the central sampling chamber, and the space clamped between the outside of the air extraction inner isolation sleeve and the inner wall of the sampling chamber is the edge sampling chamber;

[0023] The larger-diameter end of the air extraction inner isolation sleeve is connected to the inner wall of the central sampling head at the front end, and the smaller-diameter end of the air extraction inner isolation sleeve is communicated with an interface of the air extraction device; the edge sampling chamber is communicated with the air extraction device through another interface;

[0024] The air extraction device is arranged at the tail end of the sampling chamber;

[0025] The central sampling head is connected to the end of the sampling chamber where the air extraction device is not arranged, the central sampling head is communicated with the central sampling chamber, the edge sampling head is arranged on the side wall of the sampling chamber near the air extraction device end, and is communicated with the inner cavity of the edge sampling chamber.

[0026] When the above specific scheme is implemented, the air extraction device extracts air, the gas in the central sampling chamber is discharged through the central position of the air extraction device, a negative pressure space is formed in the central sampling chamber, and a large amount of gas enters the central sampling chamber from the central sampling head, realizing the collection of a large amount of sample gas;

[0027] The air inside the edge sampling chamber is extracted from around the interface of the air extraction device. The suction force around the air extraction device is small, and the pressure of the formed negative pressure space is small. A small amount of gas enters the edge sampling chamber from the edge sampling head, realizing the collection of a small amount of gas samples. This ozone continuous sampling device can collect a large amount of sample gas and a small amount of gas samples simultaneously.

[0028] The ozone continuous sampling device provided by the present utility model solves the problems of low sampling efficiency and small application range of the existing ozone sampler.

[0029] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments of the present utility model and, in conjunction with the accompanying drawings, makes a detailed description as follows. Description of the Drawings

[0030] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic diagram of the overall structure of the ozone continuous sampling device provided by the present utility model;

[0032] Figure 2 It is a schematic diagram of the structure of the ozone continuous sampling device provided by the present utility model from another angle;

[0033] Figure 3 It is a sectional view of the ozone continuous sampling device provided by the present utility model.

[0034] In the figure: 1 - air extraction device; 2 - central sampling head; 21 - sampling head branch; 22 - air inlet tank; 3 - sampling chamber; 31 - inner air extraction isolation sleeve; 32 - central sampling chamber; 33 - edge sampling chamber; 34 - central sampling membrane; 35 - sample storage bin; 4 - edge sampling head; 41 - fine sampling membrane; 42 - sealing ring. Detailed implementation manners

[0035] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "central", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 to the present utility model.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" 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, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] The embodiment of the present application provides an ozone continuous sampling device for efficient ozone gas sampling in different places and environments.

[0039] An ozone continuous sampling device provided in this embodiment, as Figures 1 - 3 shown, the ozone continuous sampling device includes: an air extraction device 1, a central sampling head 2, an edge sampling head 4, and a sampling chamber 3;

[0040] The sampling chamber 3 is a tubular structure with a hollow interior. An inner air extraction isolation sleeve 31 is arranged in the sampling chamber 3, and the inner air extraction isolation sleeve 31 is in a funnel shape; the inner air extraction isolation sleeve 31 divides the sampling chamber 3 into a central sampling chamber 32 and an edge sampling chamber 33. The inner tube space of the inner air extraction isolation sleeve 31 is the central sampling chamber 32, and the clamping space between the outside of the inner air extraction isolation sleeve 31 and the inner wall of the sampling chamber 3 is the edge sampling chamber 33;

[0041] One end of the air extraction inner isolation sleeve 31 with a larger diameter is connected to the inner wall of the central sampling head 2 at the front end, and the other end of the air extraction inner isolation sleeve 31 with a smaller diameter is communicated with an interface of the air extraction device 1; the edge sampling chamber 33 is communicated with the air extraction device 1 through another interface;

[0042] The air extraction device 1 is arranged at the tail end of the sampling chamber 3;

[0043] The central sampling head 2 is connected to one end of the sampling chamber 3 where the air extraction device 1 is not arranged. The central sampling head 2 is communicated with the central sampling chamber 32. The edge sampling head 4 is arranged on the side wall of the sampling chamber 3 near the air extraction device 1 and is communicated with the inner cavity of the edge sampling chamber 33.

[0044] Specifically, the air extraction device 1 is a rotary exhaust fan, with a large air pressure in the center and a small air pressure around.

[0045] During actual application, the air extraction device 1 extracts air, and the gas in the central sampling chamber 32 is discharged through the central position of the air extraction device 1. A negative pressure space is formed in the central sampling chamber 32. A large amount of gas (containing a large amount of ozone) enters the central sampling chamber 32 from the central sampling head 2, realizing the collection of a large amount of air samples;

[0046] The air inside the edge sampling chamber 33 is extracted from around the interface of the air extraction device 1. The suction force around the air extraction device 1 is small, and the pressure of the formed negative pressure space is small. A small amount of gas enters the edge sampling chamber 33 from the edge sampling head 4, realizing the collection of a small amount of gas samples. This ozone continuous collection device can collect a large amount of air samples and a small amount of gas samples simultaneously.

[0047] In the specific technical solution of the embodiment of the present utility model, the central sampling head 2 includes a plurality of sampling head branches 21;

[0048] The air outlet ends of the plurality of sampling head branches 21 are communicated with each other to form the air outlet end of the central sampling head 2. The plurality of sampling head branches 21 extend from the air outlet end of the central sampling head 2 to the surroundings, and the air inlet ends of the plurality of sampling head branches 21 fold back towards the air outlet end of the central sampling head 2.

[0049] The central sampling head 2 is divided into a plurality of sampling head branches and extends to the surroundings, expanding the sampling range of the central sampling head 2. The air inlet ends of the sampling head branches 21 folding downwards prevent dust from falling into the interior of the sampling head branches 21.

[0050] In the specific technical solution of the embodiment of the present utility model, an air inlet tank 22 is arranged at the air inlet end of the sampling head branch 21. One end of the air inlet tank 22 is communicated with the air inlet end of the sampling head branch 21, the other end of the air inlet tank 22 is closed, and a shutter-type air inlet is arranged on the side wall of the air inlet tank 22.

[0051] The gas around the central sampling head 2 enters through the air inlets on the side wall of the air inlet tank 22, which avoids the reduction of the sampling range after the air inlet end of the sampling head branch 21 folds back. At the same time, the louver-shaped air inlets can block the relatively large suspended matter in the inhaled gas.

[0052] In the specific technical solution of the embodiment of the present utility model, a plurality of sampling head branches 21 are arranged in a circular pattern around the air outlet end of the central sampling head 2, and the distance between adjacent sampling head branches 21 is equal.

[0053] The plurality of sampling head branches 21 extend evenly in all directions, ensuring that the collected samples are uniform and avoiding collecting samples in a small range.

[0054] In the specific technical solution of the embodiment of the present utility model, as Figure 3 shown, the diameter of the middle position of the sampling chamber 3 is larger than the diameter of the end of the sampling chamber 3 connected to the central sampling head. A central sampling membrane 34 is arranged at the middle position of the sampling chamber 3.

[0055] Air with the same pressure has a faster flow rate in a pipe with a smaller diameter and a slower flow rate in a pipe with a larger diameter. The larger space at the central position of the sampling chamber 3 reduces the flow rate of the collected air sample (which contains a large amount of ozone gas), enabling the central sampling membrane 34 to fully adsorb the organic matter in the air and at the same time preventing the organic matter adsorbed on the central sampling membrane 34 from being blown away by the air flow.

[0056] In the specific technical solution of the embodiment of the present utility model, the middle position of the sampling chamber 3 is set as a sample storage bin 35. The diameter of the sample storage bin 35 is larger than the diameter of the middle position of the sampling chamber 3, and the central sampling membrane 34 is arranged inside the sample storage bin 35.

[0057] The sample storage bin 35 further increases the diameter at the position of the central sampling membrane 34, making the air entering through the central sampling head 2 stay longer.

[0058] In the specific technical solution of the embodiment of the present utility model, a plurality of edge sampling heads 4 are arranged on the side wall of the sampling chamber 3 near the air extraction device 1. The plurality of edge sampling heads 4 are evenly distributed in a circular pattern around the side wall of the sampling chamber 3.

[0059] The air around the sampling chamber 3 can enter the edge sampling chamber 33 through the plurality of edge sampling heads 4, improving the sampling range of the edge sampling heads 4.

[0060] In the specific technical solution of the embodiment of the present utility model, as Figure 3 shown, the edge sampling head 4 is detachably connected to the side wall of the sampling chamber 3, and a fine sampling membrane 41 is arranged at one end of the edge sampling head 4 connected to the side wall of the sampling chamber 3.

[0061] A small amount of air passes through the fine sampling membrane 41. The fine sampling membrane 41 filters out the organic matter in the air. Through subsequent detection and analysis of the fine sampling membrane 41 by other detection instruments, ozone in the air is determined. Details of other detection instruments are not elaborated here.

[0062] In the specific technical solution of the embodiment of the present utility model, as Figure 2 shown, an outer side of a connection part between the edge sampling head 4 and a side wall of the sampling chamber 3 is sleeved with a sealing ring 42.

[0063] The edge sampling head 4 is detachably connected to the side wall of the sampling chamber 3, which facilitates the removal of the edge sampling head 4 for replacing the fine sampling membrane 41. The sealing ring 42 prevents air leakage at the connection between the edge sampling head 4 and the sampling chamber 3.

[0064] In the specific technical solution of the embodiment of the present utility model, the central sampling head 2 is detachably connected to the sampling chamber 3.

[0065] The central sampling head 2 is relatively large in volume. Detachably connecting the central sampling head 2 to the sampling chamber 3 allows the central sampling head 2 and the sampling chamber 3 to be disassembled during transportation, reducing the space volume occupied by the ozone continuous sampling device.

[0066] In summary, the air extraction device 1 extracts air, and the gas in the central sampling chamber 32 is discharged through the central position of the air extraction device 1, forming a negative pressure space in the central sampling chamber 32. A large amount of gas enters the central sampling chamber 32 through the central sampling head 2, realizing the collection of a large volume of air samples;

[0067] The air inside the edge sampling chamber 33 is extracted from around the interface of the air extraction device 1. The suction force around the air extraction device 1 is small, and the negative pressure space formed has a small pressure. A small amount of gas enters the edge sampling chamber 33 through the edge sampling head 4, realizing the collection of a small volume of gas samples.

[0068] The ingenious structural design of the sampling chamber 3 is actually a double-chamber sampling cavity formed by the central sampling chamber 32 and the edge sampling chamber 33. Cooperating with the double sampling heads (the central sampling head 2 and the edge sampling head 4), two non-interfering sampling methods, namely large-volume air sampling and small-volume gas collection, can be realized;

[0069] In a further technical solution, the central sampling head 2 is a composite multi-head sampling structure and the inner diameter of the central sampling cavity inside is larger. The larger inner cavity is suitable for efficient sampling work of a large volume of air.

[0070] Finally, it should be noted that the embodiments in this specification are all described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. And these modifications, replacements or combinations do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ozone continuous sampling device, characterized in that, Including: An air extraction device, a central sampling head, an edge sampling head and a sampling chamber; The sampling chamber is a hollow tubular structure. An air extraction inner isolation sleeve is arranged inside the sampling chamber, and the air extraction inner isolation sleeve is in a funnel shape; the air extraction inner isolation sleeve divides the sampling chamber into a central sampling chamber and an edge sampling chamber. The inner tube space of the air extraction inner isolation sleeve is the central sampling chamber, and the clamping space between the outside of the air extraction inner isolation sleeve and the inner wall of the sampling chamber is the edge sampling chamber; The end with a larger diameter of the air extraction inner isolation sleeve is connected to the inner wall of the front central sampling head, and the end with a smaller diameter of the air extraction inner isolation sleeve is communicated with an interface of the air extraction device; the edge sampling chamber is communicated with the air extraction device through another interface; The air extraction device is arranged at the tail end of the sampling chamber; The central sampling head is connected to one end of the sampling chamber where the air extraction device is not arranged. The central sampling head is communicated with the central sampling chamber. The edge sampling head is arranged on the side wall of the sampling chamber near the air extraction device and is communicated with the inner cavity of the edge sampling chamber.

2. The ozone continuous sampling device according to claim 1, wherein The central sampling head includes a plurality of sampling head branches; The air outlet ends of the plurality of sampling head branches are communicated with each other to form the air outlet end of the central sampling head. The plurality of sampling head branches extend around from the air outlet end of the central sampling head, and the air inlet ends of the plurality of sampling head branches fold back towards the air outlet end of the central sampling head.

3. The ozone continuous sampling device according to claim 2, characterized in that, An air inlet tank is arranged at the air inlet end of the sampling head branch. One end of the air inlet tank is communicated with the air inlet end of the sampling head branch, the other end of the air inlet tank is closed, and a shutter-type air inlet is arranged on the side wall of the air inlet tank.

4. The ozone continuous sampling device according to claim 3, characterized in that, The plurality of sampling head branches are arranged in a circular pattern around the air outlet end of the central sampling head, and the distance between adjacent sampling head branches is equal.

5. The ozone continuous sampling device according to claim 1, characterized in that, The diameter of the middle position of the sampling chamber is larger than the diameter of the end of the sampling chamber connected to the central sampling head. A central sampling membrane is arranged at the middle position of the sampling chamber.

6. The ozone continuous sampling device according to claim 5, characterized in that, The middle position of the sampling chamber is set as a sample storage bin. The diameter of the sample storage bin is larger than the diameter of the middle position of the sampling chamber. The central sampling membrane is arranged inside the sample storage bin.

7. The ozone continuous sampling device according to claim 1, characterized in that, A plurality of the edge sampling heads are arranged on the side wall of the sampling chamber near the air extraction device, and the plurality of edge sampling heads are evenly distributed in a circular pattern around the side wall of the sampling chamber.

8. The ozone continuous sampling device according to claim 7, characterized in that, The edge sampling head is detachably connected to the side wall of the sampling chamber. A fine sampling membrane is arranged at one end of the edge sampling head connected to the side wall of the sampling chamber.

9. The ozone continuous sampling device according to claim 8, wherein, A sealing ring is sleeved outside the connection part between the edge sampling head and the side wall of the sampling chamber.

10. The ozone continuous sampling device according to claim 4, characterized in that, The central sampling head is detachably connected to the sampling chamber.

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