Filtering device of environmental atmosphere dust sampling instrument

Abstract

The utility model relates to the technical field of environment detection, and discloses an environmental atmosphere dust sampling instrument filtering device which comprises a limiting ring used for being installed on an air inlet in a sampling instrument in a limiting mode, a filtering mechanism is detachably embedded in the limiting ring, and the filtering mechanism comprises a first filtering net, a second filtering net and a blocking filtering net. According to the utility model, the problems that the existing dust filtering effect is not good and other impurities easily interfere with the collection are solved, and the first filter screen and the second filter screen in the filtering mechanism can be combined to form a double-layer sealed filtering structure, so that the sucked dust can be better attached to the filter screens, and the dust can be effectively filtered. Therefore, the phenomenon that the gas falls into the gas inlet pipe is avoided, the measured data is more accurate, and meanwhile, the collection is better prevented from being influenced by the environment.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental detection, in particular to a filtering device for an environmental air dust sampler. Background Art

[0002] Dust refers to solid particles suspended in the air. The International Organization for Standardization stipulates that solid suspended matter with a particle size of less than 75μm is defined as dust. The presence of dust in the atmosphere is one of the main reasons for protecting the earth's temperature. Too much or too little dust in the atmosphere will have a catastrophic impact on the environment.

[0003] Too much dust will pollute the atmosphere and also have an impact on human physical and mental health. Excessive levels of certain combustible dust may also cause explosions, resulting in safety hazards and economic losses. Therefore, in daily life and industrial production, it is necessary to sample the dust in the air and analyze the dust content and types in the air to reduce safety hazards and economic losses.

[0004] The existing Chinese utility model patent with authorization announcement number CN212807760U provides a dust sampler for environmental detection, which includes a shell, a suction pump is installed in the shell, the upper end face of the shell is fixedly connected to an air inlet pipe, the air inlet pipe is connected to the inside of the shell, the central axis of the air inlet pipe is perpendicular to the upper end face of the shell, the air inlet end of the air inlet pipe is overlapped with a filter membrane clamp, a filter membrane is placed in the filter membrane clamp, the filter membrane blocks the air inlet end of the air inlet pipe, and the outer peripheral surface of the air inlet pipe is provided with a limit assembly for fixing the filter membrane clamp.

[0005] To sum up, the above technical scheme makes it difficult for dust on the filter membrane to fall off the filter membrane, so as to ensure the integrity of dust sampling, thereby providing accurate samples for subsequent detection of dust content in the air, so as to ensure the accuracy of the test results; however, when sucked by the suction pump, dust particles smaller than the caliber of the filter membrane pores can pass through the filter membrane caliber into the air intake pipe, and at the same time, the dust is not easy to adhere to the filter membrane, thereby affecting the detection structure, and cannot block other impurities such as leaves in the air, thereby affecting the collection progress and test results. Utility Model Content

[0006] The utility model aims to solve the problem that the existing dust filtering effect is not very good and other impurities are easy to interfere with the collection process.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A filtering device for an ambient air dust sampler, comprising:

[0009] A restriction ring is used to restrict the air inlet installed on the sampler;

[0010] The filter mechanism is detachably embedded in the limiting ring, and the filter mechanism comprises a first filter screen, a second filter screen and a barrier filter screen.

[0011] According to the environmental air dust sampler filter device provided by the utility model: a placement groove is provided on the limiting ring, and a plurality of the placement grooves are arranged in a circular row on the limiting ring, and an insertion hole is provided at the bottom of the placement groove.

[0012] According to the environmental atmosphere dust sampler filtering device provided by the utility model: a clamping plate is provided on the outer surface of one end of the first filter screen corresponding to the placement groove, and an insertion hole is fixedly provided on the bottom of the clamping plate, and the insertion hole is adapted to the insertion rod.

[0013] According to the environmental atmospheric dust sampler filtering device provided by the utility model: the first filter screen wraps the second filter screen, so that the first filter screen and the second filter screen are combined to form a double-layer filtering device, and the first filter screen and the second filter screen are fixedly arranged between them, and the second filter screen is wrapped in the first filter screen.

[0014] According to the environmental air dust sampler filtering device provided by the utility model: the barrier filter is fixedly arranged at the opening of the first filter, so that the first filter assembly forms an irregular sphere.

[0015] According to the filter device of the ambient air dust sampler provided by the utility model: the limiting ring is a metal spring structure, so that the limiting ring has a certain elasticity.

[0016] The utility model has the following beneficial effects:

[0017] The first filter screen and the second filter screen are combined to form a double-layer filter structure, so that when the filter device is placed in the air intake pipe, dust will not fall into the air intake pipe through the suction of the suction pump, thereby making the detection result more accurate. At the same time, the barrier filter screen can better block impurities during inhalation, so that the filter structure can be more unobstructed and will not be blocked, and secondly, it makes collection more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall bottom structure of an embodiment of the utility model;

[0020] Figure 3 It is a side structural plan view of an embodiment of the utility model;

[0021] Figure 4This is a schematic diagram of the overall explosion structure of an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the bottom explosion structure of an embodiment of the utility model.

[0023] Legend:

[0024] 1. Restriction ring; 101. Placement groove; 102. Insertion hole;

[0025] 2. Filter mechanism; 20. First filter screen; 21. Barrier filter screen; 22. Second filter screen;

[0026] 201. Snap-in plate; 202. Insertion rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Combine the following Figure 1-Figure 5 The embodiment shown describes the technical solution of the utility model:

[0029] A filter device for an ambient air dust sampler includes: a limiting ring 1 for limiting an air inlet installed on the sampler, a filter mechanism 2 detachably embedded in the limiting ring 1, and the filter mechanism 2 includes a first filter screen 20, a second filter screen 22 and a barrier filter screen 21.

[0030] It can be understood that the limiting ring 1 is a circular ring structure. When in use, the limiting ring 1 is clamped on the air inlet pipe of the dust sampler, and then the filter mechanism 2 is clamped and installed on the limiting ring 1, and the filter mechanism 2 is composed of a first filter screen, a second filter screen and a barrier filter screen.

[0031] The environmental atmosphere dust sampler filter device provided by the embodiment of the utility model, by setting a first filter screen 20 and a second filter screen 22, combines the first filter screen 20 and the second filter screen 22 to form a double-layer filter structure, so that when the filter device is placed in the air intake pipe, the dust will not fall into the air intake pipe through the suction of the suction pump, so that the detection result is more accurate, and the barrier filter screen 21 set at the same time can better block impurities during inhalation, so that the filter structure can be better unobstructed and will not be blocked, and secondly, it makes collection more convenient.

[0032] According to the environmental air dust sampler filter device provided by the embodiment of the utility model, a placement groove 101 is opened on the limiting ring 1, and a plurality of placement grooves 101 are arranged in a circular row on the limiting ring 1, and an insertion hole 102 is opened at the bottom of the placement groove 101.

[0033] Figure 1 and Figure 4 A filter device for an environmental atmospheric dust sampler is implemented, a placement groove 101 is opened on the limiting ring 1, and the number of placement grooves 101 is set to four, and they are symmetrically distributed, so that the overall distribution of the placement grooves 101 is more neat, and it is more convenient to install the filter mechanism 2 together, and the installed filter mechanism 2 is more stable.

[0034] The environmental atmosphere dust sampler filter device provided by the embodiment of the utility model can better install the filter mechanism 2 through the placement groove 101, so that the filter mechanism 2 is more stable when in use, and the shaking is reduced, so that the dust attached to the surface is more firmly, thereby better facilitating the collection of dust in the air.

[0035] According to the environmental atmosphere dust sampler filtering device provided by the embodiment of the utility model, a clamping plate 201 is provided on the outer surface of one end of the first filter screen 20 corresponding to the placement groove 101, and an insertion hole 102 is fixedly provided at the bottom of the clamping plate 201, and the insertion hole 102 is adapted to the insertion rod 202.

[0036] Figure 3 and Figure 4 A filtering device for an environmental atmospheric dust sampler is implemented, in which a clamping plate 201 is arranged on the outer surface of the first filter screen 20 corresponding to the placement groove 101, and an insertion rod 202 is arranged on the clamping plate 201, so that the insertion hole 102 and the insertion rod 202 correspond to each other, and at the same time, the insertion hole 102 is conveniently mounted on the insertion rod 202, so that the first filter screen 20 and the limiting ring 1 are connected together.

[0037] The environmental atmospheric dust sampler filter device provided in the embodiment of the utility model can better connect the first filter screen 20 with the limiting ring 1 through the provision of the insertion rod 202, so that the first filter screen 20 and the limiting ring 1 are mutually engaged, so that they restrict and act on each other, and are thus assembled together.

[0038] According to the environmental atmospheric dust sampler filter device provided by the embodiment of the utility model, the first filter screen 20 wraps the second filter screen 22, so that the first filter screen 20 and the second filter screen 22 are combined to form a double-layer filtering device, and the first filter screen 20 and the second filter screen 22 are fixedly arranged between them, and the second filter screen 22 is wrapped in the first filter screen 20.

[0039] Figure 1 and Figure 4 A filtering device for an environmental atmospheric dust sampler is implemented in which a first filter screen 20 wraps a second filter screen 22, so that a double-layer process device is formed between the first filter screen 20 and the second filter screen 22, and the second filter screen 22 is fixedly welded in the first filter screen 20, so that the distance between the first filter screen 20 and the second filter screen 22 is 1-2 cm.

[0040] The environmental atmosphere dust sampler filtering device provided by the embodiment of the utility model has a first filter screen 20 and a second filter screen 22, and the second filter screen 22 is welded to the first filter screen 20, so that the combination forms a double-layer filtering structure. At the same time, the aperture of the first filter screen 20 is smaller than the aperture of the second filter screen 22, so that the dust not blocked by the second filter screen 22 can be better filtered through the first filter screen 20, thereby preventing the dust from entering the air intake pipe, making the sampling of the dust more convenient, and at the same time making the dust better attached to the filtering device, thereby improving the accuracy of the detection effect.

[0041] According to the filter device of the ambient air dust sampler provided by the embodiment of the utility model, the barrier filter 21 is fixedly arranged at the opening of the first filter 20, so that the first filter 20 is combined to form an irregular hemispherical shape.

[0042] Figure 1 and Figure 4 A filtering device for an environmental atmospheric dust sampler is implemented, in which a barrier filter 21 is welded at the opening of a first filter 20, so that the barrier filter 21 seals the first filter 20, and then wraps the second filter 22 therein. When the barrier filter 21 is welded to the first filter 20, the first filter 20 forms a hollow irregular hemispherical shape.

[0043] The environmental atmosphere dust sampler filtering device provided by the embodiment of the utility model has a barrier filter 21, which is set on the first filter 20, so that the first filter 20 is sealed, and at the same time, the dust is better transported to the second filter 22 through the barrier filter 21. The pore size of the barrier filter 21 is larger than the pore size of the second filter 22, which can better and more conveniently block the flying leaves or other larger impurities in the air through the barrier filter 21, so that the collected dust is cleaner.

[0044] According to the filter device of the ambient air dust sampler provided by the embodiment of the utility model, the limiting ring 1 is a metal spring structure, so that the limiting ring 1 has a certain elasticity.

[0045] Figure 2 and Figure 5A filter device for an ambient air dust sampler is implemented, and a limiting ring 1 is set as a metal spring, so that the limiting ring 1 has a certain elasticity, so that the limiting ring 1 can shrink and deform in a small range.

[0046] The environmental atmospheric dust sampler filter device provided by the embodiment of the utility model, by setting the limiting ring 1 as a metal spring sheet, makes it more convenient to install the limiting ring 1 when installing the filter mechanism 2, and makes the combination between the filter mechanism 2 and the limiting ring 1 more convenient. At the same time, the limiting ring 1 is a metal spring sheet, so that the limiting ring 1 can be better embedded when being installed into the air inlet pipe. Secondly, due to the performance of the metal spring sheet of the limiting ring 1, there is a certain reaction force during the compression process, so that the connection between the limiting ring 1 and the air inlet pipe is more firm and stable, so that the installation is simpler and more convenient.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter device for an ambient air dust sampler, characterized in that: include: A restriction ring (1) is used to restrict the air inlet installed on the sampler; A filter mechanism (2) is detachably embedded in the restriction ring (1), and the filter mechanism (2) comprises a first filter screen (20), a second filter screen (22) and a barrier filter screen (21).

2. The filter device for an ambient air dust sampler according to claim 1, characterized in that: The limiting ring (1) is provided with a placement groove (101), and a plurality of the placement grooves (101) are arranged in a circular row on the limiting ring (1), and an insertion hole (102) is provided at the bottom of the placement groove (101).

3. The filter device for an ambient air dust sampler according to claim 2, characterized in that: A clamping plate (201) is provided on the outer surface of one end of the first filter screen (20) corresponding to the placement groove (101), and an insertion hole (102) is fixedly provided on the bottom of the clamping plate (201), and the insertion hole (102) is adapted to the insertion rod (202).

4. The filter device for an ambient air dust sampler according to claim 1, characterized in that: The first filter screen (20) wraps the second filter screen (22), so that the first filter screen (20) and the second filter screen (22) are combined to form a double-layer filtering device, and the first filter screen (20) and the second filter screen (22) are fixedly arranged between them, and the second filter screen (22) is wrapped in the first filter screen (20).

5. The filter device for an ambient air dust sampler according to claim 1, characterized in that: The barrier filter (21) is fixedly arranged at the opening of the first filter (20), so that the first filter (20) is combined to form an irregular spherical shape.

6. The filter device for an ambient air dust sampler according to claim 1, characterized in that: The limiting ring (1) is a metal spring structure, so that the limiting ring (1) has a certain elasticity.

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