Simple combined passive collection device for atmospheric dry and wet deposits

Abstract

The utility model relates to a simple combined passive collection device for dry and wet atmospheric deposits. The simple combined passive collection device comprises a vertically arranged dust accumulation cylinder and a funnel cover arranged above the dust accumulation cylinder, the funnel cover is provided with a first open end and a second open end, the size of the first open end is larger than that of the second open end, and the second open end is detachably connected to a top opening of the dust accumulation cylinder, so that the dust accumulation cylinder is communicated with an inner cavity of the funnel cover; the middle part of the inner cavity of the funnel cover is sequentially provided with a detachable isolation net plate and an anti-overflow grating from top to bottom, the anti-overflow grating is provided with an isolation hole for falling of a sediment, and the isolation hole extends to a certain height in the vertical direction. According to the simple combined passive collection device for the dry and wet deposits in the atmosphere, the large opening type design is adopted, so that the dry and wet deposits can enter the dust accumulation cylinder; meanwhile, an isolation net plate and an anti-overflow grid are arranged, turbulent flow in the dust accumulation cylinder can be weakened, and on the premise that collection is not affected, the situation that dry sediment in the cylinder is brought out by external airflow is reduced.

Description

Technical Field

[0001] This utility model relates to the field of atmospheric monitoring and data acquisition technology, specifically a simple combined passive data acquisition device for dry and wet atmospheric deposition. Background Technology

[0002] With the rapid industrialization and urbanization in my country over the past few decades, some pollutants emitted from various industrial and agricultural production activities have diffused into all corners of the environment via the atmosphere. Quantitative research on atmospheric dry and wet deposition is of great significance for scientifically understanding the characteristics of air pollution, regional transport sources and pathways, and chemical transformation. In recent years, numerous studies have shown that heavy metal pollutants migrating into soil via atmospheric dry and wet deposition are one of the important sources of exogenous heavy metal input into topsoil. The collection of atmospheric dry and wet deposition samples is an important preliminary step for conducting studies on heavy metal input flux assessment and source apportionment in the study area. Especially for point source pollution (such as mining areas, metal smelters, chemical plants, and electronic waste dismantling plants), continuous multi-point monitoring of atmospheric deposition in the surrounding areas is a prerequisite for clarifying the dustfall intensity, composition, impact range, and degree of particulate pollutants released from the pollution point source into the surrounding area. However, such studies usually require extensive preliminary collection of atmospheric dry and wet deposition samples.

[0003] Atmospheric dry and wet deposition sampling devices can be categorized into active and passive samplers based on their functions and sampling methods. Active samplers have the advantage of being able to perform automated, separate collection of dry and wet deposition data. However, to achieve accurate quantitative collection of deposition data during both dry and wet deposition processes, these devices require highly sensitive rain sensors and stable drive control systems. Such instruments are typically complex in structure, and their manufacturing, operation, and maintenance costs are high, usually exceeding ten thousand yuan. Furthermore, these partially automated sampling devices require a stable power supply for long-term operation. Given the characteristics and requirements of atmospheric dry and wet deposition sampling, atmospheric deposition sampling devices often need to be deployed in sparsely populated, complex environments without external power sources. Current batteries struggle to guarantee stable operation under complex outdoor conditions (such as strong winds, heavy rain, thunderstorms, and wildlife activity). Therefore, power supply issues are a significant factor limiting the widespread application of active atmospheric deposition sampling devices. In addition, the stability of the transmission system within automated components in natural outdoor environments also faces considerable challenges. Passive sampling devices are typically simple to manufacture, easy to carry, inexpensive, easy to operate, and require no power system. Once deployed, they can perform integrated collection of dry and wet atmospheric sediments in the field for extended periods.

[0004] Due to the low atmospheric dry and wet deposition flux per unit area under natural conditions, especially dry deposition flux, the collection efficiency of ordinary diameter dust collection cylinders is limited. At the same time, since the dust collection cylinder is located outdoors, external airflow can easily generate turbulence inside the cylinder, which will carry out the dry particle sediment that has entered the cylinder, making it even more difficult to collect sufficient samples in a short period of time (1 to 3 months). This will greatly restrict subsequent laboratory analysis and testing.

[0005] Therefore, it is particularly important to provide a simple atmospheric dry and wet deposition sampling device that has high collection efficiency for both dry and wet deposition and can work stably in the field for a long time. Utility Model Content

[0006] The purpose of this invention is to propose a simple combined passive collection device for dry and wet atmospheric sediments. The large open design facilitates the entry of dry and wet sediments into the dust collection tank. At the same time, the installation of isolation mesh and anti-overflow grid can reduce turbulence in the dust collection tank and reduce the amount of dry sediments in the tank being carried out by external airflow without affecting collection.

[0007] The technical solution adopted in this utility model is: a simple combined passive collection device for dry and wet atmospheric sediments, including a vertically arranged dust collection tank and a funnel cover arranged above the dust collection tank;

[0008] The funnel cover has a first open end and a second open end. The size of the first open end is larger than the size of the second open end. The second open end is detachably connected to the top opening of the dust collection cylinder, so that the dust collection cylinder and the inner cavity of the funnel cover are connected.

[0009] The inner cavity of the funnel cover is provided with a detachable isolation mesh plate and an anti-overflow grid in the middle from top to bottom. The anti-overflow grid has a partition hole for the sediment to fall. The vertical extension height of the partition hole makes its inner wall form a flow-blocking wall to block the horizontal flow of air. The chamber below the anti-overflow grid is a sediment storage chamber.

[0010] As a preferred embodiment, the overflow guardrail has at least two guardrails with gaps between adjacent guardrails, and the height of the guardrail in the vertical direction is greater than its width in the horizontal direction.

[0011] As a preferred option, multiple grid plates are arranged in an alternating pattern to form a mesh-like grille.

[0012] As a preferred embodiment, the width of the upper end of the grid plate is smaller than the width of its lower end.

[0013] As a preferred embodiment, the distance from the isolation mesh to the first opening end is greater than 15cm.

[0014] As a preferred option, the mesh size of the isolation mesh is 2cm.

[0015] As a preferred embodiment, the dust collection cylinder is a transparent cylinder with graduated strips on its side.

[0016] As a preferred embodiment, the funnel cover includes an upper straight wall, a sloping funnel wall, and a lower straight wall connected in sequence.

[0017] As a preferred embodiment, the isolation mesh plate is located on the inner side of the straight wall of the funnel.

[0018] As a preferred embodiment, the dust collection cylinder is provided with a lifting handle on its outer side.

[0019] The beneficial effects of this utility model are:

[0020] To address the shortcomings of existing technologies, a simplified, modular passive atmospheric dry and wet sediment collection device is provided, which, compared to existing dust collection cylinders, offers the following advantages:

[0021] 1. The large open design increases the collection area, which is conducive to the entry of dry and wet sediments into the dust collection tank;

[0022] 2. The dust collection tank and funnel cover are separate units, making them easy to replace;

[0023] 3. Install isolation mesh panels to prevent leaves or other large suspended objects from entering the sediment storage chamber;

[0024] 4. Install an overflow prevention grille with a certain vertical height. When the turbulent flow comes into contact with it, it will create horizontal obstruction and weakening, reducing kinetic energy. Without affecting the collection, this will reduce the amount of dry sediment in the cylinder that is carried out by the external airflow.

[0025] 5. The small top size of the grid reduces the deposition of dry particles on top of the overflow grid, which is beneficial for collection. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an overall axonometric view of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the funnel cover of this utility model;

[0029] Figure 3 This is a schematic diagram of the dust collection cylinder of this utility model;

[0030] Figure 4This is a schematic diagram of the vertical cross-section of the funnel cover of this utility model;

[0031] Figure 5 This is a schematic diagram of a shape comprising two grid plates according to the present invention;

[0032] Figure 6 This is a schematic diagram of another shape of the present invention, which includes two grid plates;

[0033] Figure 7 This is a top view schematic diagram of one state of the anti-overflow grille of this utility model.

[0034] Reference numerals: 1. Dust collection tank; 2. Funnel cover; 201. Upper straight wall of the funnel; 202. Sloping funnel wall; 203. Lower straight wall of the funnel; 3. Isolation mesh plate; 4. Overflow guardrail; 401. Grille plate; 5. Scale strip; 6. Lifting handle. Detailed Implementation

[0035] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0036] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "a," "an," or "the," etc., used in this utility model patent application specification and claims do not express a quantity limitation, but rather indicate the presence of at least one; the terms "first," "second," and "third," as used herein, should not be considered as a limitation on the order of components, but are merely for distinguishing different components; the terms "comprising" or "including," etc., indicate that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0037] To more clearly describe the specific structural components of this data acquisition device, in conjunction with the attached... Figure 1-7 This embodiment is described as follows:

[0038] like Figure 1 , Figure 2 or Figure 3As shown, a simple combined passive atmospheric dry and wet sediment collection device is provided. A dust collection cylinder 1 is vertically arranged, and a funnel cover 2 is installed above the dust collection cylinder 1. The funnel cover 2 has a first opening end and a second opening end. The size of the first opening end is larger than the size of the second opening end. The second opening end can be detachably connected to the top opening of the dust collection cylinder 1, so that the dust collection cylinder 1 and the inner cavity of the funnel cover 2 are connected. The dust collection cylinder 1 is fixed at a high position outdoors. Atmospheric sediment enters the isolation chamber through the first opening end. The size of the first opening end is larger than the size of the dust collection cylinder 1, which increases the sedimentation area and facilitates the entry of dry and wet sediment into the dust collection cylinder, thereby improving the collection efficiency.

[0039] The dust collection tank 1 is a transparent tank with a scale bar 5 on its side for observing the amount of sediment inside; a lifting handle 6 can be provided on the outer side of the dust collection tank 1 for easy transfer.

[0040] Dust collection cylinder 1 is a cuboid made of transparent acrylic sheet or plexiglass with a wall thickness of 5 mm. The opening at the top of the dust collection cylinder is a square with a side length of 20 cm (inner diameter) and a height of 40 cm. Before use, dust collection cylinder 1 and funnel cover 2 need to be soaked in 2% nitric acid for 24 hours, rinsed with deionized water, and dried or oven-dried. After drying, cover the opening with a plastic bag for later use. Before use, add a certain amount of ethylene glycol and water to dust collection cylinder 1, covering the bottom surface to a certain height. Then cover the opening with a plastic bag and carry it safely to the sampling point for use.

[0041] For details on the structure of funnel hood 2, please refer to [link / reference]. Figure 2 The funnel includes an upper straight wall 201, a sloping funnel wall 202, and a lower straight wall 203 connected in sequence. The slope of the sloping funnel wall 202 can be 15°. The isolation mesh plate 3 is located inside the upper straight wall 201. Bolt holes are provided at the open ends of the lower straight wall 203 and the dust collection cylinder 1, and the two can be connected by bolts.

[0042] like Figure 4 As shown, a detachable isolation mesh plate 3 and an overflow prevention grid 4 are sequentially arranged from top to bottom in the middle of the inner cavity of the funnel cover 2. The overflow prevention grid 4 has pores for sediment to fall, and the vertical extension of the pores forms a flow-blocking wall on its inner wall to prevent horizontal airflow. The chamber below the overflow prevention grid 4 is a sediment storage chamber. Atmospheric sediment is ultimately collected in the sediment storage chamber. The isolation mesh plate 3 is used to prevent leaves or other large suspended objects from entering the sediment storage chamber. The isolation mesh plate 3 is made of fine wire that is not easily corroded to prevent dry sediment from depositing on the isolation mesh plate 3. The function of the overflow prevention grid 4 is to reduce the overflow of dry sediment that enters the sediment storage chamber with turbulence.

[0043] The isolation mesh 3 and the overflow prevention grid 4 can be connected to the funnel cover 2 by means of clips, bolts or other methods, making them easy to replace and clean during use.

[0044] Specifically, the distance from the isolation mesh plate 3 to the first opening end is greater than 15cm, and the mesh diameter of the isolation mesh plate 3 is 2cm.

[0045] like Figure 5 As shown in the cross-section, the overflow grille 4 has at least two grille plates 401, with perforations between adjacent grille plates 401. The vertical height h of the grille plate 401 is greater than its horizontal width w. The overflow grille 4 has a certain vertical height, so that its inner wall forms a flow-blocking wall to block the horizontal flow of air. When the turbulent flow comes into contact with the flow-blocking wall, it will generate horizontal obstruction, reduce kinetic energy, and reduce the amount of dried sediment in the cylinder being carried out by the external airflow without affecting the collection.

[0046] like Figure 7 As shown, multiple grid plates 401 are arranged in an alternating manner to form a grid-like grille; the grid plates 401 can also be arranged at equal intervals, and the grid plates 401 can be straight plates as shown in the figure or curved.

[0047] like Figure 6 As shown, the width w1 at the upper end of the grid plate 401 is smaller than the width w2 at its lower end. The smaller top size of the grid plate reduces the deposition of dry particles on top of the overflow grid, which is beneficial for collection.

[0048] The parts not described in detail in this embodiment are existing technologies.

[0049] It should be noted that although the present invention has been described through the above embodiments, there may be other various embodiments of the present invention. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but all such changes and modifications should fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A simple combined passive collection device for atmospheric dry and wet precipitation, characterized by: It comprises a dust storage cylinder (1) arranged vertically and a funnel cover (2) arranged above the dust storage cylinder (1); The funnel cover (2) has a first opening end and a second opening end, the first opening end is larger than the second opening end, and the second opening end is detachably connected to the top opening of the dust storage cylinder (1), so that the dust storage cylinder (1) and the inner cavity of the funnel cover (2) are in communication; A detachable isolation mesh plate (3) and an anti-overflow grille (4) are arranged in sequence from top to bottom in the middle of the inner cavity of the funnel cover (2); the anti-overflow grille (4) has a partition hole for sediment to fall, and the vertical extension height of the partition hole is such that the inner wall thereof forms a flow-blocking wall for blocking the horizontal flow of airflow; the chamber below the anti-overflow grille (4) is a sediment storage chamber.

2. A simple combined passive collection device for atmospheric dry and wet precipitation according to claim 1, characterized in that: The overflow prevention grille (4) has at least two grille plates (401), and partition holes are provided between adjacent grille plates (401); The height of the grid plate (401) in the vertical direction is greater than its width in the horizontal direction.

3. A simple combined passive collection device for atmospheric dry and wet precipitation according to claim 2, characterized in that: A plurality of grid plates (401) are arranged in a staggered manner to form a grid-like grille.

4. A simple combined passive collection device for atmospheric dry and wet precipitation according to claim 2, characterized in that: The width of the upper end of the grid plate (401) is smaller than the width of the lower end thereof.

5. The simple combined passive collection device for atmospheric dry and wet precipitation according to claim 1 is characterized by: The distance from the isolation mesh plate (3) to the first opening end is greater than 15 cm.

6. A simple combined passive collection device for atmospheric dry and wet precipitation according to claim 1, characterized in that: The mesh size of the isolation mesh plate (3) is 2 cm.

7. The simple combined passive collection device for atmospheric dry and wet precipitation according to claim 1 is characterized by: The dust storage cylinder (1) is a transparent cylinder body, and a scale bar (5) is provided on the side thereof.

8. The simple combined passive collection device for atmospheric dry and wet precipitation according to claim 1 is characterized by: The funnel cover (2) comprises a funnel upper straight wall (201), a sloped funnel wall (202) and a funnel lower straight wall (203) which are connected in sequence.

9. A simple combined passive collection device for atmospheric dry and wet precipitation according to claim 8, characterized in that: The isolation mesh plate (3) is located on the inner side of the upper straight wall (201) of the funnel.

10. The simple combined passive collection device for atmospheric dry and wet precipitation according to claim 1, characterized in that: A lifting handle (6) is provided on the outer side of the dust storage cylinder (1).

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