A sample drying device for environmental monitoring laboratories

Abstract

This invention belongs to the field of sample drying technology, and specifically relates to a sample drying device for environmental monitoring laboratories. The device includes a horizontally positioned base, an outer shell mounted on top of the base, a second cover plate detachably installed on the rear side of the outer shell to seal it, a drive assembly on the second cover plate, a rotating rod horizontally inserted inside the outer shell, at least three connecting rods fixed to the side wall of the rotating rod in a circular pattern, and an inner shell vertically fixed to the end of each connecting rod. A ventilation slot is provided inside the rotating rod, a first air inlet pipe is inserted into each connecting rod, and an air outlet pipe is inserted into the side wall of the inner shell. A control assembly is located on the front side wall of the outer shell. In this invention, soil samples are filled into the inner shell, and hot air is introduced into the inner shell after passing through the ventilation slots of the rotating rod and the first air inlet pipes. The soil sample tumbles along the inner side wall of the inner shell, ensuring sufficient contact between the hot air and the soil sample, thus improving the drying efficiency.

Description

Technical Field

[0001] This invention belongs to the field of sample drying technology, and in particular relates to a sample drying device for environmental monitoring laboratories. Background Technology

[0002] Environmental monitoring refers to a series of tasks involving the systematic, regular, and continuous observation, measurement, analysis, and evaluation of environmental factors, as well as the management and application of monitoring results. Environmental monitoring laboratories are typically used to detect and analyze pollutants and harmful substances in various environments. During environmental monitoring operations, drying equipment is needed to dry the samples collected for environmental monitoring, thus facilitating the processing and testing of environmental monitoring samples. Environmental monitoring samples generally include soil samples and biological samples, with biological samples mainly consisting of plants. The heating plates or heating elements inside the drying equipment generate heat, which is transferred to the samples through heat conduction and convection, causing the moisture in the samples to evaporate.

[0003] Currently, existing technologies involve placing samples directly inside a drying oven and drying the soil with hot air supplied by a hot air blower. During the drying process, the soil remains stationary, which can lead to the top layer of soil and the soil surface being dried while the soil remains moist. The hot air only passes through the top surface of the soil, resulting in low heat utilization and poor drying effect. The soil also needs to be manually turned over periodically, which reduces work efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a sample drying device for environmental monitoring laboratories, which has a simple structure and improves the drying efficiency of soil.

[0005] The aforementioned sample drying device for environmental monitoring laboratories includes a horizontally positioned base, an outer shell mounted on top of the base, a second cover plate detachably mounted on the rear side of the outer shell to seal it, a drive assembly for driving a rotating rod to rotate on the second cover plate, a rotating rod horizontally inserted inside the outer shell, at least three connecting rods fixed to the side wall of the rotating rod, the connecting rods being circumferentially distributed on the side wall of the rotating rod, an inner shell vertically fixed to the end of each connecting rod, the inner shell being a cylindrical tube structure, a first cover plate detachably mounted on the rear side of the inner shell, a fixing assembly for fixing plants on the first cover plate, a ventilation slot opened inside the rotating rod, a first air inlet pipe inserted into each connecting rod, the inner shells communicating with the ventilation slots through corresponding first air inlet pipes, an air outlet pipe inserted into the side wall of each inner shell, one end of the air outlet pipe located inside the inner shell at the center of the inner shell, and a control assembly for supplying hot air to the ventilation slots and controlling the circulation of hot air inside the outer shell on the front side wall of the outer shell.

[0006] Furthermore, the control component includes a fan, which is mounted on the front side wall of the housing. The fan inlet is connected to a main pipe, the other end of which is inserted into the top of the housing. The fan outlet is connected to the ventilation slot of the rotating rod. A dehumidification component for handling moisture in the air is provided on the main pipe.

[0007] Furthermore, the dehumidification assembly includes a dehumidification box, which is installed on the side wall of the outer casing above the fan. At least two moisture-absorbing plates are horizontally fixed inside the dehumidification box. The moisture-absorbing plates are alternately installed on the side walls of the dehumidification box and the outer casing, and a gap for air flow is left between the moisture-absorbing plates and the side walls of the dehumidification box and the outer casing.

[0008] Furthermore, a second air inlet pipe is installed on the outer side wall of the inner shell. The second air inlet pipe has a through hole. The air outlet end of the first air inlet pipe passes through the through hole. The second air inlet pipe is connected to the ventilation slot through the first air inlet pipe. At least two third air inlet pipes are installed on the second air inlet pipe. The air outlet end of the third air inlet pipe passes into the inner shell.

[0009] Furthermore, a baffle plate is installed at the air outlet of the third air inlet pipe via a fixing rod. The baffle plate has an arc structure and covers the air outlet of the third air inlet pipe.

[0010] Furthermore, both ends of the air outlet pipe are fitted with threaded sleeves that are threadedly engaged with it, and filter plates are vertically fixed inside the threaded sleeves.

[0011] Furthermore, the drive assembly includes a rotating shaft that is horizontally mounted inside a second cover plate. A drive component for driving the rotating shaft to rotate is installed on the rear side wall of the second cover plate. Two inserts are fixed at the other end of the rotating shaft, and a slot for inserting the inserts is provided at the rear end of the rotating rod.

[0012] Furthermore, the fixing component includes cable ties, which are fixed to the rear sidewall of the first cover plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Hot air is sent into the ventilation duct through the control component. After passing through the first air inlet pipe, the second air inlet pipe and multiple third air inlet pipes, the hot air enters the inner shell and comes into full contact with the soil that is lifted, thereby improving the soil drying efficiency. The hot air after use enters the outer shell through the air outlet pipe. When the inner shell rotates, it drives the hot air in the outer shell to rotate, which is used to heat the inner shell and dry the plants, thereby improving the utilization rate of the hot air. Finally, the hot air is sent into the control component through the main pipe, forming a hot air circulation in the inner shell and the outer shell.

[0015] 2. When the inner shell rotates slowly, the soil is turned down along the inner wall of the inner shell under the action of gravity, so that the soil in the upper and lower layers can fully contact the hot air. When the soil turns to the air outlet of the third air inlet pipe, most of the soil is blocked by the curved structure of the baffle plate, and a small part of the soil enters the baffle plate. The third air inlet pipe continuously provides hot air. The distance between the baffle plate and the side wall of the third air inlet pipe is less than the inner diameter of the third air inlet pipe. Hot air is sent from the large diameter pipe into the small gap. The thrust of the hot air increases, pushing the soil that has entered the baffle plate away, thus preventing the soil from entering the third air inlet pipe.

[0016] 3. Fill the inner shell halfway with soil samples. When the inner shell rotates slowly, the soil rolls down the inner wall of the inner shell. Most of the large soil particles are offset from the air outlet pipe located in the middle of the inner shell. A small number of smaller soil particles move towards the air outlet pipe under the drive of the hot air. The soil is blocked by the filter plates on both sides of the air outlet pipe. Replace the detachable filter plates to ensure the passage of hot air.

[0017] 4. The plant is fixed to the first cover plate by the fixing component. The inner shell brings the plant into contact with the hot air inside the outer shell, drying the plant and further improving the utilization rate of hot air. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 for Figure 1 A sectional view;

[0020] Figure 3 for Figure 1 Front view;

[0021] Figure 4 for Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 5 for Figure 1 A magnified view of a section at point B in the middle;

[0023] The components in the diagram are named as follows: 1. Outer shell; 2. Inner shell; 3. Main pipe; 4. Outlet pipe; 5. Connecting rod; 6. Rotating rod; 7. First inlet pipe; 8. Second inlet pipe; 9. Base; 10. Fan; 11. Connecting pipe; 12. Dehumidification box; 13. Moisture absorption plate; 14. First cover plate; 15. Cable tie; 16. Rotating shaft; 17. Insert block; 18. Backstop plate; 19. Fixing rod; 20. Third inlet pipe; 21. Threaded sleeve; 22. Filter plate; 23. Second cover plate. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0025] Example 1

[0026] This embodiment describes a sample drying device for an environmental monitoring laboratory, such as... Figures 1 to 5 As shown, it includes a horizontally arranged base 9, with an outer shell 1 installed on the top of the base 9. Hot air is stored in the outer shell 1 to improve the efficiency of hot air use. The outer shell 1 is preferably a circular tube structure to save materials in the production of the outer shell 1. The outer shell 1 is made of heat-insulating material, or the inner wall of the outer shell 1 is covered with heat-insulating coating to reduce the consumption of hot air temperature.

[0027] A second cover plate 23 is detachably installed on the rear side of the outer shell 1 to close the outer shell 1. The second cover plate 23 is fastened to the rear side wall of the outer shell 1. The second cover plate 23 can be detached by means of a buckle and a slot, which facilitates the insertion and removal of samples. A buckle is installed on the rear side wall of the outer shell 1, and a matching slot is opened on the second cover plate 23. The second cover plate 23 is installed on the rear side wall of the outer shell 1 by the buckle fastening into the slot.

[0028] A rotating shaft 16 is horizontally inserted inside the second cover plate 23. A driving component for driving the rotating shaft 16 to rotate is installed on the rear side wall of the second cover plate 23. The power output end of the driving component is connected to the right end of the rotating shaft 16. The rotating shaft 16 is driven to rotate by the driving component. The driving component is existing technology and generally uses a motor. Two inserts 17 are fixed at the other end of the rotating shaft 16. The rear end of the rotating rod 6 is provided with a slot for inserting the inserts 17. After the two inserts 17 are inserted into the slot, the rotating shaft 16 rotates and drives the rotating rod 6 to rotate together. When the second cover plate 23 needs to be removed, the inserts 17 can be removed from the slot. This paragraph as a whole constitutes a driving assembly for driving the rotating rod 6 to rotate. Of course, in the driving assembly, a through hole is provided on the second cover plate 23 that is open to the left and right. A bearing is installed in the through hole. The outer ring of the bearing is fixed in the through hole, and the rotating shaft 16 is fixed in the inner ring of the bearing. The rotating shaft 16 is mounted on the second cover plate 23 and can rotate freely through the bearing.

[0029] A rotating rod 6 is horizontally inserted inside the outer shell 1. The rotating rod 6 is horizontally installed in the outer shell 1, allowing the rotating rod 6 to rotate freely inside the outer shell 1.

[0030] At least three connecting rods 5 are fixed on the side wall of the rotating rod 6. The connecting rods 5 are distributed in a circle on the side wall of the rotating rod 6. The fixed ends of the connecting rods 5 are all fixed on the outer side wall of the rotating rod 6. The connecting rods 5 are evenly distributed in a circle on the outer side wall of the connecting rods 5, which is conducive to the smooth rotation of the rotating rod 6.

[0031] The ends of the connecting rods 5 are all vertically fixed with inner housings 2. The inner housings 2 are fixed on the connecting rods 5 and are installed on the rotating rods 6 through the connecting rods 5. The inner housings 2 are used to dry soil samples.

[0032] The inner shell 2 has a cylindrical structure. A first cover plate 14 is detachably installed on the rear side of the inner shell 2. The detachable structure of the first cover plate 14 and the inner shell 2 is the same as the detachable structure of the outer shell 1 and the second cover plate 23, which will not be described in detail here.

[0033] Cable ties 15 are fixed to the rear side wall of the first cover plate 14. Preferably, there are two cable ties 15, which are fixed to the upper and lower ends of the first cover plate 14 respectively. The plant is fixed through two fixing points to improve the fixing effect of the plant. The whole of this paragraph constitutes a fixing component for fixing plants. When the fixing component is used, the plant is attached to the first cover plate 14 and tied to the first cover plate 14 by the cable ties 15. When the inner shell 2 rotates, it drives the plant to rotate together, so that it can fully contact the hot air inside the outer shell 1 for drying the plant and improving the utilization rate of hot air.

[0034] A ventilation slot is provided inside the rotating rod 6. The ventilation slot is opened along the length of the rotating rod 6. The front end of the ventilation slot extends out of the rotating rod 6 and communicates with the outside, which facilitates the entry of hot air into the ventilation slot. The rear end of the ventilation slot is sealed.

[0035] Each connecting rod 5 is fitted with a first air inlet pipe 7. The inner shell 2 is connected to the ventilation slot through the corresponding first air inlet pipe 7. The connecting rod 5 has a through slot that is open from top to bottom. The first air inlet pipe 7 is fixed in the ventilation slot. One end of the first air inlet pipe 7 passes through the rotating rod 6 and is connected to the ventilation slot. The other end passes into the inner shell 2, connecting the ventilation slot and the inner shell 2.

[0036] Air outlet pipes 4 are installed on the side walls of the inner shell 2. One end of the air outlet pipe 4 is located at the center of the inner shell 2. The air outlet pipe 4 is installed along the radius of the inner shell 2. One end of the air outlet pipe 4 enters the inner shell 2 and is located at the center of the inner shell 2. The other end of the air outlet pipe 4 exits the inner shell 2 and is located inside the outer shell 1. The hot air after use in the inner shell 2 enters the outer shell 1 through the air outlet pipe 4. When filling the inner shell 2 with soil samples, the thickness of the soil accumulation should not exceed half of the inner shell 2 to prevent soil from entering the air outlet pipe 4 and blocking it when the inner shell 2 rotates. When the inner shell 2 is filled with half soil samples, the soil rolls down the inner side wall of the inner shell 2 when the inner shell 2 rotates slowly. Most of the large soil particles are offset from the air outlet pipe 4 located in the middle of the inner shell 2 to prevent soil from entering the air outlet pipe 4.

[0037] A fan 10 is installed on the front wall of the outer casing 1. The fan 10 is existing technology and is used to provide air at different temperatures through ventilation ducts. It is generally a hot and cold air fan, a type of fan that provides both hot and cold air, heated or cooled by electricity, suitable for factory workshops. A main pipe 3 is connected to the air inlet of the fan 10. The other end of the main pipe 3 is inserted through the top of the outer casing 1. A through hole is provided on the top of the outer casing 1, and one end of the main pipe 3 is inserted into the through hole, while the other end is fixed to the air inlet of the fan 10. Used air from inside the outer casing 1 re-enters the fan 10 through the main pipe 3. The air outlet of the fan 10 is connected to the ventilation slot of the rotating rod 6, and the air outlet of the fan 10 is connected to the left side of the rotating rod 6. The fan 10 is positioned directly opposite the ventilation duct, supplying hot air to it. A dehumidification box 12 is installed on the side wall of the outer casing 1 above the fan 10. The dehumidification box 12 is mounted on the front side wall of the outer casing 1. At least two moisture-absorbing plates 13 are horizontally fixed inside the dehumidification box 12. These plates absorb the steam released after the moisture in the sample absorbs heat, reducing the humidity in the environment and improving drying efficiency. The moisture-absorbing plates 13 are existing technology, generally using quicklime. Quicklime has good water absorption properties and releases heat after absorbing water, indirectly heating the air. The moisture-absorbing plates 13 are alternately installed on the side walls of the dehumidification box 12 and the outer casing 1, with gaps for airflow between the moisture-absorbing plates 13 and the side walls of the dehumidification box 12 and the outer casing 1. Figure 2 As shown, the right end of the first moisture-absorbing plate 13 is fixed to the side wall of the outer casing 1, and a gap is left between the left end and the inner side wall of the dehumidification box 12. The left end of the second moisture-absorbing plate 13 is fixed to the inner side wall of the moisture-absorbing plate 13, and a gap is left between the right end and the outer casing 1. This section as a whole constitutes a dehumidification component for treating moisture in the air. When the dehumidification component is in use, after the air enters the dehumidification box 12, it flows in an "S" shape along the moisture-absorbing plate 13, increasing the contact area with the moisture-absorbing plate 13 and improving the dehumidification effect. This section as a whole constitutes a control component for supplying hot air to the ventilation duct and controlling the circulation of hot air in the outer casing 1. When the control component is in use, hot air is supplied to the ventilation duct through the fan 10, and the hot air used in the outer casing 1 re-enters the fan 10 through the main pipe 3.

[0038] In the control assembly, hot air is sent into the ventilation slot of the rotating rod 6 by the fan 10. The hot air flows through the first air inlet pipe 7, the second air inlet pipe 8 and multiple third air inlet pipes 20 and then enters the inner shell 2, making full contact with the soil that is rolled and lifted, thereby improving the drying efficiency of the soil. The hot air in the inner shell 2 enters the outer shell 1 through the air outlet pipe 4. When the inner shell 2 rotates, it drives the hot air in the outer shell 1 to rotate, which is used to heat the inner shell 2 and dry the plants, thereby improving the utilization rate of the hot air. Finally, the hot air is sent into the control assembly through the main pipe 3 to form a hot air circulation.

[0039] In this embodiment, the two cover plates are opened, and the soil sample is filled into the inner shell 2. The plant sample is fixed to the first cover plate 14 by the fixing component. The two cover plates are respectively installed on the inner shell 2 and the outer shell 1. Hot air is sent into the ventilation slot of the rotating rod 6 by the control component. The hot air enters the inner shell 2 after passing through several first air inlet pipes 7 to dry the soil sample inside the inner shell 2. During this process, the rotating rod 6 is driven to rotate by the drive component, and the inner shell 2 is slowly rotated inside the outer shell 1 by the connecting rod 5. When the inner shell 2 rotates, the soil sample inside the inner shell 2 rolls along the inner wall of the inner shell 2, moving the soil... During the soil turning process, the hot air provided by the first air inlet pipe 7 fully contacts the soil, improving the soil drying efficiency. When the soil rolls to the air outlet of the first air inlet pipe 7, the first air inlet pipe 7 continues to provide hot air, pushing away the covered soil. The hot air used by the inner shell 2 is discharged into the outer shell 1 through the air outlet pipe 4. The rotating inner shell 2 drives the hot air in the outer shell 1 to circulate and rotate within the outer shell 1, which is used to dry the plants fixed on the first cover plate 14, further improving the utilization rate of hot air. Under the drive of the control component, the hot air in the outer shell 1 is reheated and sent back into the ventilation slot of the rotating rod 6 to achieve air circulation.

[0040] Example 2

[0041] This embodiment further illustrates the technology, such as Figure 1 and Figure 4 As shown, a second air inlet pipe 8 is installed on the outer side wall of the inner shell 2. The second air inlet pipe 8 has an arc-shaped structure and is installed on the circumferential side wall of the inner shell 2.

[0042] The second air inlet pipe 8 has a through hole, the air outlet end of the first air inlet pipe 7 is inserted into the through hole, the second air inlet pipe 8 is connected to the ventilation slot through the first air inlet pipe 7, the air outlet of the first air inlet pipe 7 is inserted into the second air inlet pipe 8, and the second air inlet pipe 8 and the ventilation slot are connected through the first air inlet pipe 7.

[0043] At least two third air inlet pipes 20 are installed on the second air inlet pipe 8. The air outlet end of the third air inlet pipe 20 is inserted into the inner shell 2. The third air inlet pipe 20 is installed on the second air inlet pipe 8. The air outlet end of the second air inlet pipe 8 is inserted into the inner shell 2. The inner shell 2 and the second air inlet pipe 8 are connected through the third air inlet pipe 20.

[0044] In this embodiment, the hot air in the ventilation slot enters the second air inlet pipe 8 through the first air inlet pipe 7, and then enters the inner shell 2 through several third air inlet pipes 20. The multiple third air inlet pipes 20 provide hot air at the same time, which facilitates the flow of hot air in the inner shell 2. At the same time, the smaller diameter third air inlet pipes 20 act as a barrier to the soil, preventing soil from entering the ventilation slot of the rotating rod 6.

[0045] Example 3

[0046] This embodiment further illustrates the technology, such as Figure 4 As shown, a soil baffle 18 is installed at the air outlet of the third air inlet duct 20 via a fixing rod 19. The soil baffle 18 has an arc-shaped structure and covers the air outlet of the third air inlet duct 20. The arc-shaped soil baffle 18 covers the air outlet of the third air inlet duct 20, blocking the soil and further preventing soil from entering the third air inlet duct 20. When the inner shell 2 rotates slowly, the soil is turned down along the inner wall of the inner shell 2 under the action of gravity, making full contact with the hot air. When the soil turns to the air outlet of the third air inlet duct 20, most of the soil is blocked. The curved retaining plate 18 blocks a small amount of soil from entering the retaining plate 18. The third air inlet duct 20 continuously provides hot air. The distance between the retaining plate 18 and the side wall of the third air inlet duct 20 is less than the inner diameter of the third air inlet duct 20. Hot air is sent from the large diameter duct into the small gap, and the thrust of the hot air increases, pushing away the soil that has entered the retaining plate 18 and preventing the soil from entering the third air inlet duct 20. The curved retaining plate 18 can also guide the hot air, making the area covered by the hot air larger, which is conducive to the flow of hot air in the inner shell 2 and increases the contact with the soil.

[0047] Example 4

[0048] This embodiment further illustrates the technology, such as Figure 1 and Figure 5 As shown, both ends of the air outlet pipe 4 are fitted with threaded sleeves 21 that are threaded together. Filter plates 22 are vertically fixed inside the threaded sleeves 21. The threaded sleeves 21 enable the detachable installation of the filter plates 22. The filter plates 22 block the soil inside the inner shell 2, preventing the dried soil from entering the outer shell 1 with the hot air through the air outlet pipe 4. A small number of smaller soil particles move towards the air outlet pipe 4 under the influence of the hot air, and are blocked by the filter plates 22 on both sides of the air outlet pipe 4. The detachable filter plates 22 can be replaced to ensure the passage of hot air.

Claims

1. A sample drying device for an environmental monitoring laboratory, comprising a horizontally arranged base (9), an outer shell (1) mounted on the top of the base (9), a second cover plate (23) detachably mounted on the rear side of the outer shell (1) to close the outer shell (1), a drive assembly for driving a rotating rod (6) to rotate is provided on the second cover plate (23), and a rotating rod (6) is horizontally inserted inside the outer shell (1), characterized in that: At least three connecting rods (5) are fixed on the side wall of the rotating rod (6). The connecting rods (5) are distributed in a circle on the side wall of the rotating rod (6). The end of each connecting rod (5) is vertically fixed with an inner shell (2). The inner shell (2) is a cylindrical structure. A first cover plate (14) is detachably installed on the rear side of the inner shell (2). A fixing component for fixing plants is provided on the first cover plate (14). A ventilation groove is opened in the rotating rod (6). A first air inlet pipe (7) is installed in each connecting rod (5). The inner shell (2) is connected to the ventilation groove through the corresponding first air inlet pipe (7). An air outlet pipe (4) is installed on the side wall of the inner shell (2). One end of the air outlet pipe (4) is located in the inner shell (2) at the center of the inner shell (2). A control component is provided on the front side wall of the outer shell (1) to supply hot air to the ventilation groove and control the circulation of hot air in the outer shell (1). A second air inlet pipe (8) is installed on the outer side wall of the inner shell (2). A through hole is opened on the second air inlet pipe (8). The air outlet end of the first air inlet pipe (7) is inserted into the through hole. The second air inlet pipe (8) is connected to the ventilation slot through the first air inlet pipe (7). At least two third air inlet pipes (20) are installed on the second air inlet pipe (8). The air outlet end of the third air inlet pipe (20) is inserted into the inner shell (2). The air outlet of the third air inlet pipe (20) is equipped with a baffle plate (18) by a fixing rod (19). The baffle plate (18) has an arc structure and covers the air outlet of the third air inlet pipe (20). The inner shell (2) is used to dry soil samples.

2. The sample drying device for environmental monitoring laboratories according to claim 1, characterized in that: The control component includes a fan (10), which is installed on the front side wall of the outer casing (1). The air inlet of the fan (10) is connected to a main pipe (3), and the other end of the main pipe (3) is inserted into the top of the outer casing (1). The air outlet of the fan (10) is connected to the ventilation slot of the rotating rod (6). The main pipe (3) is equipped with a dehumidification component for handling moisture in the air.

3. The sample drying device for environmental monitoring laboratories according to claim 2, characterized in that: The dehumidification assembly includes a dehumidification box (12), which is installed on the side wall of the outer shell (1) above the fan (10). At least two moisture-absorbing plates (13) are horizontally fixed inside the dehumidification box (12). The moisture-absorbing plates (13) are alternately installed on the side walls of the dehumidification box (12) and the outer shell (1). There is a gap for air flow between the moisture-absorbing plates (13) and the side walls of the dehumidification box (12) and the outer shell (1).

4. The sample drying device for environmental monitoring laboratories according to claim 1, characterized in that: Both ends of the air outlet pipe (4) are fitted with threaded sleeves (21) that are threaded together, and filter plates (22) are vertically fixed inside the threaded sleeves (21).

5. The sample drying device for environmental monitoring laboratories according to claim 1, characterized in that: The drive assembly includes a rotating shaft (16), which is horizontally inserted into the second cover plate (23). A drive component for driving the rotating shaft (16) to rotate is installed on the rear side wall of the second cover plate (23). Two inserts (17) are fixed at the other end of the rotating shaft (16). A slot for inserting the inserts (17) is provided at the rear end of the rotating rod (6).

6. The sample drying device for environmental monitoring laboratories according to claim 1, characterized in that: The fixing component includes a cable tie (15) which is fixed to the rear sidewall of the first cover plate (14).

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