Atmospheric particulate collection device

Abstract

The utility model provides an atmospheric particulate collection device. The atmospheric particulate collection device comprises a sampling head and an atmospheric particulate sampler body, the atmospheric particulate sampler body comprises a shell and an air extractor; the shell is a cuboid, a through hole is formed in the upper part of the shell, an air extractor is arranged in the shell, and the air outlet end of the sampling head penetrates through the through hole and is communicated with the air extractor; an opening of the air inlet end of the sampling head faces upwards, a dustproof cover is arranged at the air inlet end of the sampling head, an air inlet gap exists between the dustproof cover and the sampling head, and an atmospheric particulate sampling film is arranged in the sampling head. The air exhaust device exhausts air, and air around the atmospheric particulate collection device can enter the sampling head from the air inlet of the sampling head and the air inlet gap of the dustproof cover, so that the sampling range of the sampling head is expanded. The dustproof cover is arranged above the air inlet of the sampling head, so that dust falling freely can be prevented from falling onto the atmospheric particulate sampling film in the sampling head, and the sampling precision is prevented from being influenced. The problem that an existing atmospheric particulate sampler is small in sampling range is solved.

Description

Technical Field

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

[0002] Pollution-type atmospheric particulate matter is generated in production operation sites such as industrial and mining, textile, chemical, and grain industries, which in turn causes air pollution, and a large amount of pollution-type atmospheric particulate matter pollutes the environment. However, research has found that after inhaling a certain amount of pollution-type atmospheric particulate matter, people will suffer from occupational diseases such as pneumoconiosis and silicosis, so there are some potential safety hazards; therefore, timely monitoring of the concentration of pollution-type atmospheric particulate matter and effective environmental governance have become an important task.

[0003] Further research has found that the existing atmospheric particulate matter sampler samples the atmospheric particulate matter in the air through the sampling head on the side. Due to the sampling head being set on the side of the atmospheric particulate matter sampler, the sampling range is small. Content of the Utility Model

[0004] The purpose of the utility model is to provide an atmospheric particulate matter collection device to solve the problem of the small sampling range of the existing atmospheric particulate matter sampler.

[0005] The utility model provides an atmospheric particulate matter collection device, including: a sampling head and an atmospheric particulate matter sampler body;

[0006] The atmospheric particulate matter sampler body includes: a housing and an air extraction device;

[0007] The housing is a cuboid, a through hole is provided above the housing, an air extraction device is arranged inside the housing, and the air outlet end of the sampling head passes through the through hole and is communicated with the air extraction device;

[0008] The air inlet end of the sampling head opens upward, a dust-proof cover is arranged at the air inlet end of the sampling head, the dust-proof cover is arranged above the air inlet end of the sampling head, and there is an air inlet gap between the dust-proof cover and the sampling head. An atmospheric particulate matter sampling membrane is arranged inside the sampling head.

[0009] Further, the sampling head includes an upper sampling head section, a middle sampling head section, and a lower sampling head section;

[0010] One end of the lower sampling head section is connected to the through hole of the housing, the middle sampling head section is detachably connected to the other end of the lower sampling head section, the upper sampling head section is detachably connected to the end of the middle sampling head section away from the lower sampling head section, and the atmospheric particulate matter sampling membrane is arranged inside the upper sampling head section.

[0011] Further, the upper sampling head section, the middle sampling head section, and the lower sampling head section are connected by a quick-release device, and a PM2.5 sampling membrane is arranged inside the middle sampling head section.

[0012] Further, a connecting column is provided on one side of the dust cover close to the intake end of the sampling head, and the dust cover is connected to the intake end of the sampling head through the connecting column.

[0013] Further, the air extraction device includes a negative pressure chamber and an air extraction pump. The negative pressure chamber is arranged inside the housing, and the negative pressure chamber connects the air extraction pump and the sampling head.

[0014] Further, a dust-proof film is provided at the connection between the upper part of the negative pressure chamber and the sampling head.

[0015] Further, exhaust holes are provided on both sides of the housing, and the exhaust holes are arranged evenly.

[0016] Further, the exhaust holes are stamping holes, and the openings of the exhaust holes face downward.

[0017] Adopting the above technical solution, compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The atmospheric particulate matter collection device provided by the present utility model includes: a sampling head and an atmospheric particulate matter sampler body;

[0019] The atmospheric particulate matter sampler body includes: a housing and an air extraction device;

[0020] The housing is a cuboid. A through hole is provided above the housing, and an air extraction device is arranged inside the housing. The outlet end of the sampling head passes through the through hole and is connected to the air extraction device;

[0021] The intake end of the sampling head opens upward. A dust cover is provided at the intake end of the sampling head. The dust cover covers above the intake end of the sampling head, and there is an intake gap between the dust cover and the sampling head. An atmospheric particulate matter sampling film is arranged inside the sampling head.

[0022] During the implementation of the above specific solution, when the air extraction device extracts air, the air around the atmospheric particulate matter collection device can enter the sampling head from the intake gap between the intake port of the sampling head and the dust cover, expanding the sampling range of the sampling head. The atmospheric particulate matter in the air is collected by the atmospheric particulate matter sampling film inside the sampling head.

[0023] The dust cover is arranged above the intake port of the sampling head, which can prevent the freely falling dust from falling onto the atmospheric particulate matter sampling film inside the sampling head and affecting the sampling accuracy.

[0024] The atmospheric particulate matter collection device provided by the present utility model solves the problem of small sampling range of the existing atmospheric particulate matter sampler.

[0025] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following specifically enumerates the preferred embodiments of the present utility model and, in conjunction with the attached drawings, the detailed description is as follows. Description of the Drawings

[0026] 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 drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 is the overall structural schematic diagram of the atmospheric particulate matter collection device provided by the present utility model;

[0028] Figure 2 is the cross-sectional view of the atmospheric particulate matter collection device provided by the present utility model;

[0029] Figure 3 is the internal structural schematic diagram of the atmospheric particulate matter collection device provided by the present utility model;

[0030] Figure 4 is Figure 2 the enlarged partial internal structural schematic diagram of the atmospheric particulate matter collection device provided by the present utility model.

[0031] In the figure: 1 - sampling head; 11 - upper section of the sampling head; 111 - atmospheric particulate matter sampling membrane, 12 - middle section of the sampling head; 121 - PM2.5 sampling membrane, 13 - lower section of the sampling head; 14 - quick-release device; bushing 15; first sealing ring 16; 2 - dust-proof cover; 21 - connecting column; 3 - outer shell; 31 - exhaust hole; 4 - air extraction device; 41 - negative pressure chamber; 42 - air extraction pump; 43 - dust-proof membrane. Specific Embodiments

[0032] The following will clearly and completely describe the technical solutions of the present utility model with reference to the drawings. Obviously, the described embodiments are some embodiments of the present utility model, rather than 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 efforts fall within the scope of protection of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "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.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. 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 circumstances.

[0035] The embodiment of the present application provides an atmospheric particulate matter collection device for high-precision sampling to calculate the density of various atmospheric particulate matters (or the density of pollution-related atmospheric particulate matters) in the atmosphere.

[0036] An atmospheric particulate matter collection device provided in this embodiment, as Figure 1-2 shown, the atmospheric particulate matter collection device includes: a sampling head 1 and an atmospheric particulate matter sampler body; and the atmospheric particulate matter sampler body includes: a housing 3 and an air extraction device 4.

[0037] The housing 3 is a cuboid, a through hole is provided above the housing 3, an air extraction device 4 is provided inside the housing 3, and the air outlet end of the sampling head 1 passes through the through hole and is communicated with the air extraction device 4.

[0038] The air inlet end of the above-mentioned sampling head 1 opens upward, a dust-proof cover 2 is provided at the air inlet end of the sampling head 1, the dust-proof cover 2 is covered above the air inlet end of the sampling head 1, and there is an air inlet gap between the dust-proof cover 2 and the sampling head 1. An atmospheric particulate matter sampling membrane 111 is provided inside the sampling head 1 (the above-mentioned atmospheric particulate matter sampling membrane 111 can adopt various structural forms, for example: nanofiber membrane or polyvinyl fluoride membrane, etc.).

[0039] In actual application, the air extraction device 4 is started to perform the air extraction operation. The air around the atmospheric particulate matter collection device can enter the sampling head 1 from the air inlet of the sampling head 1 and the air inlet gap of the dust-proof cover 2. Such a structural design expands the sampling range of the sampling head 1, and the atmospheric particulate matter in the air is collected by the atmospheric particulate matter sampling membrane 111 inside the sampling head 1.

[0040] At the same time, the dust-proof cover 2 is provided above the air inlet of the sampling head 1, which can prevent the freely falling dust from falling onto the atmospheric particulate matter sampling membrane 111 inside the sampling head 1 and affecting the sampling accuracy.

[0041] In the specific technical solution of the embodiment of the present utility model, as Figure 2 、 Figure 4 shown, the sampling head 1 includes an upper sampling head section 11, a middle sampling head section 12, and a lower sampling head section 13.

[0042] One end of the lower section 13 of the sampling head is connected to the through hole of the outer shell 2. The middle section 12 of the sampling head is detachably connected to the other end of the lower section 13 of the sampling head. The upper section 11 of the sampling head is detachably connected to the end of the middle section 12 of the sampling head that is away from the lower section 13 of the sampling head. In a specific structural solution, the atmospheric particulate sampling membrane 111 is arranged inside the upper section 11 of the sampling head.

[0043] The sampling head 1 is set as the upper section 11 of the sampling head, the middle section 12 of the sampling head, and the lower section 13 of the sampling head. On the one hand, the above design can facilitate the transportation of the atmospheric particulate collection device, prevent the sampling head 1 from being knocked during transportation due to its excessive length, and at the same time facilitate the replacement of the atmospheric particulate sampling membrane 111 inside the sampling head 1. On the other hand, the three-section sampling head 1 can ensure modular production between structures and facilitate the separate replacement of each section of the structure. Therefore, an integrally formed sampling head 1 is not conducive to production, and is even less conducive to achieving a reliable sealed connection with structures such as the outer shell 3.

[0044] In the structure of the three-section sampling head 1, the lowermost lower section 13 of the sampling head realizes a sealed connection with structures such as the negative pressure chamber 41 through the structure of the bushing 15 (please indicate it in the drawing). The bottom of the outer ring part of the bushing 15 is connected to the mounting hole at the top of the outer shell 3, and a first sealing ring 16 is arranged between the two.

[0045] In the specific technical solution of the embodiment of the present utility model, the upper section 11 of the sampling head, the middle section 12 of the sampling head, and the lower section 13 of the sampling head are connected through a quick-release device 14. A PM2.5 sampling membrane 121 is arranged inside the middle section 12 of the sampling head.

[0046] Among them, the above quick-release device 14 is preferably used as an annular clamp structure. A flange contact surface is arranged between the upper section 11 of the sampling head and the middle section 12 of the sampling head, and there is a second gasket (not shown in the figure) between the two flange contact surfaces. A flange contact surface is also arranged between the lower section 13 of the sampling head and the middle section 12 of the sampling head, and there is a second gasket between the two flange contact surfaces.

[0047] The PM2.5 sampling membrane 121 is used to intercept respirable particles with a diameter less than or equal to 2.5 microns. The quick-release device 14 facilitates the quick disassembly and connection of the sampling head 1 and also facilitates the replacement of the PM2.5 sampling membrane 121.

[0048] The atmospheric particulate collection device provided by the present utility model solves the problem of the small sampling range of the existing atmospheric particulate sampler. Since the existing atmospheric particulate sampler has a small sampling range, the calculation accuracy of the density of atmospheric particulate matter in the air is not high. Therefore, the technical solution of this application also indirectly solves the problem of the low calculation accuracy of the density of atmospheric particulate matter.

[0049] In the specific technical solution of the embodiment of the present utility model, a connecting column 21 is provided on one side of the dust cover 2 close to the air inlet end of the sampling head 1, and the dust cover 2 is connected to the air inlet end of the sampling head 1 through the connecting column 21.

[0050] The connecting column 21 connects the dust cover 2 and the air inlet end of the sampling head 1, and also separates an air inlet gap between the dust cover 2 and the sampling head 1, facilitating the air around the sampling head 1 to enter the sampling head 1 through the air inlet gap.

[0051] In the specific technical solution of the embodiment of the present utility model, as Figure 3 shown, the air extraction device 4 includes a negative pressure chamber 41 and an air extraction pump 42. The negative pressure chamber 41 is arranged inside the housing 3, and the negative pressure chamber 41 connects the air extraction pump 42 and the sampling head 1.

[0052] The air extraction pump 42 is used to extract the air in the negative pressure chamber 41, so that a micro negative pressure environment is formed in the negative pressure chamber 41. The micro negative pressure environment of the negative pressure chamber 41 enables the air at the air inlet of the sampling head 1 to automatically flow into the interior of the sampling head 1;

[0053] The negative pressure chamber 41 reduces the air flow rate of the air extraction by the air extraction pump 42, preventing the air flow rate from being too fast to stir up the accumulated dust, and also avoiding blowing off the atmospheric particulate matter attached to the atmospheric particulate matter sampling membrane 111.

[0054] In the specific technical solution of the embodiment of the present utility model, as shown in FIG. -2, a dust-proof membrane 43 is provided at the connection between the upper part of the negative pressure chamber 41 and the sampling head 1.

[0055] The dust-proof membrane 43 can reduce the air flow rate, and at the same time can prevent the tiny atmospheric particulate matter passing through the atmospheric particulate matter sampling membrane 111 and the PM2.5 sampling membrane 121 in the air from entering the negative pressure chamber 41.

[0056] In the specific technical solution of the embodiment of the present utility model, exhaust holes 31 are provided on both sides of the housing 3, and the exhaust holes 31 are arranged evenly.

[0057] The air extracted by the air extraction pump 42 in the negative pressure chamber 41 is discharged through the exhaust holes 31 on the housing 3. The exhaust holes 31 are provided on both sides of the housing 3, facilitating the discharge of the air in the negative pressure chamber 41 and also avoiding the discharged air affecting the sampled air.

[0058] In the specific technical solution of the embodiment of the present utility model, the exhaust holes 31 are punching holes, and the openings of the exhaust holes 31 face downward.

[0059] The openings of the exhaust holes 31 face downward, making the discharged air flow downward, further avoiding the discharged air affecting the sampled air and thus affecting the accuracy of the atmospheric particulate matter detection.

[0060] In summary, when the air extraction device 4 extracts air, the air around the atmospheric particulate matter collection device can enter the sampling head 1 from the air inlet of the sampling head 1 and the air inlet gap of the dust-proof cover 2, expanding the sampling range of the sampling head 1. The atmospheric particulate matter in the air is collected by the atmospheric particulate matter sampling membrane 111 inside the sampling head 1.

[0061] The dust-proof cover 2 is arranged above the air inlet of the sampling head 1, which can prevent the freely falling dust from falling onto the atmospheric particulate matter sampling membrane 111 inside the sampling head 1 and affecting the sampling accuracy.

[0062] 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 between the embodiments, reference can be made to each other;

[0063] 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 on 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 atmospheric particulate matter collection device, characterized in that, Comprising: A sampling head and an ambient particulate matter sampler body; The ambient particulate matter sampler body includes: a housing and an air extraction device; The housing is a cuboid, a through hole is provided above the housing, an air extraction device is provided inside the housing, and the air outlet end of the sampling head passes through the through hole and communicates with the air extraction device; The air inlet end of the sampling head opens upward, a dust-proof cover is provided at the air inlet end of the sampling head, the dust-proof cover is arranged above the air inlet end of the sampling head, and there is an air inlet gap between the dust-proof cover and the sampling head. An ambient particulate matter sampling membrane is provided inside the sampling head.

2. The atmospheric particulate matter collection device according to claim 1, characterized in that The sampling head includes an upper sampling head section, a middle sampling head section and a lower sampling head section; One end of the lower sampling head section is connected to the through hole of the housing, the middle sampling head section is detachably connected to the other end of the lower sampling head section, the upper sampling head section is detachably connected to the end of the middle sampling head section away from the lower sampling head section, and the ambient particulate matter sampling membrane is arranged inside the upper sampling head section.

3. The atmospheric particulate matter collection device according to claim 2, characterized in that, The upper sampling head section, the middle sampling head section and the lower sampling head section are connected by a quick-release device, and a PM2.5 sampling membrane is arranged inside the middle sampling head section.

4. The atmospheric particulate matter collection device according to claim 1, wherein A connecting column is provided on one side of the dust-proof cover close to the air inlet end of the sampling head, and the dust-proof cover is connected to the air inlet end of the sampling head through the connecting column.

5. The atmospheric particulate matter collection device according to claim 1, characterized in that, The air extraction device includes a negative pressure chamber and an air extraction pump. The negative pressure chamber is arranged inside the housing, and the negative pressure chamber communicates the air extraction pump with the sampling head.

6. The atmospheric particulate matter collection device according to claim 5, characterized in that, A dust-proof membrane is provided at the connection between the upper part of the negative pressure chamber and the sampling head.

7. The atmospheric particulate matter collection device according to claim 1, characterized in that, Exhaust holes are provided on both sides of the housing, and the exhaust holes are arranged evenly.

8. The atmospheric particulate matter collection device according to claim 7, characterized in that, The exhaust holes are stamping holes, and the openings of the exhaust holes face downward.

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