Sample drying device for environment monitoring laboratory

Abstract

The invention belongs to the technical field of sample drying, and particularly relates to a sample drying device for an environment monitoring laboratory. The device comprises a horizontally arranged base, an outer shell is installed at the top of the base, a second cover plate for sealing the outer shell is detachably installed on the rear side of the outer shell, a driving assembly is arranged on the second cover plate, a rotating rod is horizontally installed in the outer shell in a penetrating mode, at least three connecting rods are fixed to the side wall of the rotating rod, and the connecting rods are circumferentially distributed on the side wall of the rotating rod. Inner shells are vertically fixed to the tail ends of the connecting rods, ventilation grooves are formed in the rotating rod, a first air inlet pipe is installed in each connecting rod in a penetrating mode, air outlet pipes are installed on the side walls of the inner shells in a penetrating mode, and a control assembly is arranged on the front side wall of the outer shell. According to the soil drying device, the inner shell is filled with a soil sample, hot air is fed into the inner shell after the soil sample passes through the ventilation groove of the rotating rod and the first air inlet pipe, the soil sample is turned over along the inner side wall of the inner shell, the hot air makes full contact with the soil sample, and the soil drying efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sample drying, and in particular relates to a sample drying device for an environmental monitoring laboratory. Background Art

[0002] Environmental monitoring refers to a series of work that involves systematic, regular and continuous observation, measurement, analysis and evaluation of environmental factors, as well as management and application of monitoring results. Environmental monitoring laboratories are usually used to detect and analyze pollutants and harmful substances in various environments. When environmental monitoring is working, drying equipment is needed to dry the samples taken for environmental monitoring, so as to facilitate the processing and detection of environmental monitoring samples. Environmental monitoring samples generally include soil samples and biological samples. Biological samples are mainly plants. The heating plates or heating elements inside the drying equipment generate heat, which is transferred to the samples by heat conduction and convection to evaporate the water in the samples.

[0003] At present, in the prior art, the samples are directly placed inside the drying box, and the soil is dried by hot air provided by a hot air blower. The soil is always in a static state during the drying process, and the upper soil and the soil surface are easily dried. The next time the soil is still in a moist state, the hot air only passes through the upper surface of the soil, the heat utilization rate is low, and the drying effect is poor. The soil needs to be turned over manually regularly, which reduces work efficiency. Summary of the invention

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

[0005] The sample drying device for an environmental monitoring laboratory comprises a horizontally arranged base, an outer shell is installed on the top of the base, a second cover plate that closes the outer shell is detachably installed on the rear side of the outer shell, a driving component for driving the rotating rod to rotate is arranged on the second cover plate, a rotating rod is horizontally penetrated in the outer shell, at least three connecting rods are fixed on the side wall of the rotating rod, the connecting rods are circumferentially distributed on the side wall of the rotating rod, the ends of the connecting rods are vertically fixed with an inner shell, the inner shell is a circular tube structure, a first cover plate is detachably installed on the rear side of the inner shell, a fixing component for fixing plants is arranged on the first cover plate, a ventilation slot is opened in the rotating rod, a first air inlet pipe is penetrated in each connecting rod, the inner shell is connected to the ventilation slot through the corresponding first air inlet pipe, an air outlet pipe is penetrated on the side wall of the inner shell, one end of the air outlet pipe located in the inner shell is arranged at the center of the inner shell, and a control component for supplying hot air to the ventilation slot and controlling the hot air circulation in the outer shell is arranged on the front side wall of the outer shell.

[0006] Furthermore, the control component includes a fan, which is installed on the front side wall of the outer shell. The air inlet of the fan is connected to a main pipe, the other end of the main pipe is installed on the top of the outer shell, the air outlet of the fan is connected to the ventilation groove of the rotating rod, and a dehumidification component for processing moisture in the air is provided on the main pipe.

[0007] Furthermore, the dehumidification component includes a dehumidification box, which is installed on the side wall of the outer shell above the fan. At least two desiccant plates are horizontally fixed in the dehumidification box. The desiccant plates are alternately installed on the side walls of the dehumidification box and the outer shell, and a gap for air flow is left between the desiccant plates and the side walls of the dehumidification box and the outer shell.

[0008] Furthermore, a second air inlet pipe is installed on the outer wall of the inner shell, a through hole is opened on the second air inlet pipe, the air outlet end of the first air inlet pipe is inserted into the through hole, the second air inlet pipe is connected with the ventilation slot through the first air inlet pipe, at least two third air inlet pipes are installed on the second air inlet pipe, and the air outlet end of the third air inlet pipe passes into the inner shell.

[0009] Furthermore, a soil retaining plate is installed at the air outlet end of the third air inlet pipe through a fixing rod, and the soil retaining plate is in an arc structure, and the soil retaining plate covers the air outlet of the third air inlet pipe.

[0010] Furthermore, both ends of the air outlet pipe are provided with threaded sleeves threadably matched therewith, and filter plates are vertically fixed in the threaded sleeves.

[0011] Furthermore, the driving assembly includes a rotating shaft, which is horizontally installed in the second cover plate. A driving member for driving the rotating shaft to rotate is installed on the rear side wall of the second cover plate. Two plug blocks are fixed to the other end of the rotating shaft, and a slot for inserting the plug block is opened at the rear end of the rotating rod.

[0012] Furthermore, the fixing assembly includes a cable tie, which is fixed to the rear side wall of the first cover plate.

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

[0014] 1. The hot air is sent into the ventilation slot through the control component. The hot air flows through the first air inlet pipe, the second air inlet pipe and multiple third air inlet pipes and then enters the inner shell, where it fully contacts the lifted soil, thereby improving the drying efficiency of the soil. The used hot air enters the outer shell through the air outlet pipe. When the inner shell rotates, the hot air in the outer shell is driven 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, thereby 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 upper and lower layers of soil are fully in contact with the hot air. When the soil is turned to the air outlet of the third air inlet pipe, most of the soil is blocked by the retaining plate with an arc structure, and a small part of the soil enters the retaining plate. The third air inlet pipe continues to provide hot air. The distance between the retaining plate and the side wall of the third air inlet pipe is smaller than the inner diameter of the third air inlet pipe. The hot air is sent from the large pipe diameter to the small spacing. The thrust of the hot air increases, pushing away the soil entering the retaining plate to prevent the soil from entering the third air inlet pipe.

[0016] 3. Fill half of the soil sample in the inner shell. When the inner shell rotates slowly, the soil rolls down along the inner wall of the inner shell. Most of the large particles of soil stagger the air outlet pipe in the middle of the inner shell. A small number of smaller soil particles move toward the air outlet pipe driven by 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 plants are fixed on the first cover plate by means of the fixing assembly, and the inner shell drives the plants to contact the hot air in the outer shell to dry the plants, thereby further improving the utilization rate of the hot air. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 A cross-sectional view of

[0020] Figure 3 for Figure 1 Front view of

[0021] Figure 4 for Figure 1 A partial enlarged view of the middle A;

[0022] Figure 5 for Figure 1 A partial enlarged view of point B in the middle;

[0023] The names of the components in the figure are: 1. outer shell; 2. inner shell; 3. main pipe; 4. air outlet pipe; 5. connecting rod; 6. rotating rod; 7. first air inlet pipe; 8. second air inlet pipe; 9. base; 10. fan; 11. connecting pipe; 12. dehumidifier box; 13. moisture absorption plate; 14. first cover plate; 15. cable tie; 16. rotating shaft; 17. plug block; 18. earth retaining plate; 19. fixing rod; 20. third air inlet pipe; 21. threaded sleeve; 22. filter plate; 23. second cover plate. DETAILED DESCRIPTION

[0024] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings, but the present invention is not limited thereto. 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.

[0025] Example 1

[0026] The sample drying device for an environmental monitoring laboratory described in this embodiment is as follows: Figures 1 to 5 As shown, it includes a horizontally arranged base 9, an outer shell 1 is installed on the top of the base 9, and hot air is accumulated in the outer shell 1 to improve the use efficiency of the hot air. The outer shell 1 is preferably a round tube structure to save the material of the outer shell 1. The outer shell 1 is made of a heat-insulating material, or a heat-insulating coating is covered on the inner wall of the outer shell 1 to reduce the consumption of the hot air temperature;

[0027] A second cover plate 23 that closes the outer shell 1 is detachably mounted on the rear side of the outer shell 1. The second cover plate 23 is buckled on the rear side wall of the outer shell 1. The second cover plate 23 can be detachable by using structures such as buckles and slots, which is convenient for putting in and taking out samples. A buckle is mounted on the rear side wall of the outer shell 1, and a slot matching the buckle is opened on the second cover plate 23. The second cover plate 23 is mounted on the rear side wall of the outer shell 1 by buckling the buckle in the slot.

[0028] The second cover plate 23 is horizontally provided with a rotating shaft 16, and a driving member for driving the rotating shaft 16 to rotate is installed on the rear side wall of the second cover plate 23, and the power output end of the driving member is connected to the right end of the rotating shaft 16, and the rotating shaft 16 is driven to rotate by the driving member. The driving member is a prior art, and generally adopts a motor; two plug-in blocks 17 are fixed to the other end of the rotating shaft 16, and a slot for inserting the plug-in blocks 17 is provided at the rear end of the rotating rod 6. After the two plug-in blocks 17 are inserted into the slot, the rotating shaft 16 drives the rotating rod 6 to rotate together when it rotates. When the second cover plate 23 needs to be removed, the plug-in blocks 17 can be taken out of the slot; this paragraph of text as a whole constitutes a driving assembly for driving the rotating rod 6 to rotate. Of course, in the driving assembly, a through hole communicating with the left and right is provided on the second cover plate 23, and 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 installed on the second cover plate 23 through the bearing and can rotate freely;

[0029] A rotating rod 6 is horizontally installed in the outer shell 1. The rotating rod 6 is horizontally installed in the outer shell 1 front and back so that the rotating rod 6 can rotate freely in 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 circumferentially distributed 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 on the outer side wall of the connecting rod 5 in a circumferential manner, which is conducive to the smooth rotation of the rotating rod 6;

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

[0032] The inner shell 2 is a round tube structure, and a first cover plate 14 is detachably mounted 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, and will not be repeated here.

[0033] A tie 15 is fixed on the rear side wall of the first cover plate 14. Preferably, there are two tie ties 15, which are respectively fixed at the upper and lower ends of the first cover plate 14. The plants are fixed through two fixing points to improve the fixing effect of the plants. This paragraph of text as a whole constitutes a fixing component for fixing plants. When the fixing component is used, the plants are attached to the first cover plate 14, and the plants are tied to the first cover plate 14 through the tie 15. When the inner shell 2 rotates, the plants are driven to rotate together, and fully contact the hot air in the outer shell 1, which is used to dry the plants and improve the utilization rate of the hot air.

[0034] A ventilation slot is provided in the rotating rod 6. The ventilation slot is provided in the rotating rod 6 along the length direction of the rotating rod 6. The front end of the ventilation slot passes through the rotating rod 6 and communicates with the outside world, which is beneficial for hot air to enter the ventilation slot. The rear end of the ventilation slot is blocked.

[0035] Each connecting rod 5 is provided with a first air inlet pipe 7, and the inner shell 2 is connected to the ventilation slot through the corresponding first air inlet pipe 7. A through slot communicating with each other up and down is provided in the connecting rod 5, and 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 communicates with the ventilation slot, and the other end passes through the inner shell 2, connecting and communicating the ventilation slot with the inner shell 2.

[0036] The side walls of the inner shell 2 are all equipped with air outlet pipes 4. One end of the air outlet pipe 4 located in the inner shell 2 is arranged 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 is located at the center of the inner shell 2 after penetrating the inner shell 2, and the other end of the air outlet pipe 4 is located in the outer shell 1 after penetrating the inner shell 2. The hot air in the inner shell 2 after use enters the outer shell 1 through the air outlet pipe 4. When the soil sample is filled in the inner shell 2, the thickness of the soil accumulation cannot exceed half of the inner shell 2 to prevent the soil from entering the air outlet pipe 4 and blocking the air outlet pipe 4 when the inner shell 2 rotates. When half of the soil sample is filled in the inner shell 2, the soil rolls downward along the inner side wall of the inner shell 2 when the inner shell 2 rotates slowly. Most of the large particles of soil are staggered from the air outlet pipe 4 located in the middle of the inner shell 2 to prevent the soil from entering the air outlet pipe 4.

[0037] A fan 10 is installed on the front side wall of the outer shell 1. The fan 10 is a prior art and is used to provide air of different temperatures in the ventilation duct. Generally, a heating and cooling fan is adopted, which is a fan that provides hot and cold air and heats or cools the air by electricity. It is 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 installed on the top of the outer shell 1. A through hole communicating with the inside and outside is opened on the top of the outer shell 1. One end of the main pipe 3 is installed in the through hole, and the other end is fixed at the air inlet of the fan 10. The used air in the outer shell 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. The air outlet of the fan 10 is connected to the left side of the rotating rod 6. end, facing the ventilation slot, to supply hot air to the ventilation slot; a dehumidification box 12 is installed on the side wall of the outer shell 1 above the fan 10, and the dehumidification box 12 is installed on the front side wall of the outer shell 1; at least two dehumidification plates 13 are horizontally fixed in the dehumidification box 12, and the dehumidification plate 13 is used to absorb the steam released after the moisture in the sample absorbs heat, reduce the humidity in the environment, and improve the drying efficiency. The dehumidification plate 13 is a prior art, generally using quicklime, which has a good water absorption effect, and the quicklime will release heat after absorbing water, which heats the air in disguised form; the dehumidification plates 13 are alternately installed on the side walls of the dehumidification box 12 and the outer shell 1, and a gap for air flow is left between the dehumidification plate 13 and the side walls of the dehumidification box 12 and the outer shell 1, such as Figure 2 As shown, the right end of the first desiccant plate 13 is fixed on the side wall of the outer shell 1, and a gap is left between the left end and the inner wall of the dehumidification box 12; the left end of the second desiccant plate 13 is fixed on the inner wall of the dehumidification plate 13, and a gap is left between the right end and the outer shell 1; this paragraph of text 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 desiccant plate 13, increasing the contact area with the desiccant plate 13 and improving the dehumidification effect; this paragraph of text as a whole constitutes a control component that supplies hot air to the ventilation slots and controls the hot air circulation in the outer shell 1. When the control component is in use, hot air is supplied to the ventilation slots through the fan 10, and the hot air used in the outer shell 1 re-enters the fan 10 through the main pipe 3.

[0038] In the control component, the hot air is sent into the ventilation slot of the rotating rod 6 through the fan 10, and 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, fully contacting with the tumbling and raised soil, 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 component through the main pipe 3 to form a hot air circulation.

[0039] When the present embodiment is used, the two covers are opened, the soil sample is filled into the inner shell 2, the plant sample is fixed on the first cover 14 by the fixing assembly, the two covers are respectively installed on the inner shell 2 and the outer shell 1, and hot air is sent into the ventilation slot of the rotating rod 6 by the control assembly. The hot air enters the inner shell 2 after passing through a plurality of first air inlet pipes 7, and is used to dry the soil sample in the inner shell 2. In this process, the rotating rod 6 is driven to rotate by the driving assembly, and the inner shell 2 is driven to rotate slowly in the outer shell 1 by the connecting rod 5. When the inner shell 2 rotates, the soil sample in the inner shell 2 rolls along the inner wall of the inner shell 2, driving the soil Turning. During the soil turning process, the hot air provided by the first air inlet pipe 7 fully contacts the soil, thereby improving the drying efficiency of the soil. 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 to push away the covered soil. The hot air after use of 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 in the outer shell 1, and is used to dry the plants fixed on the first cover plate 14, thereby further improving the utilization rate of the hot air. The hot air in the outer shell 1 is driven by the control component, and then reheated and sent into the ventilation groove of the rotating rod 6 again to realize air circulation.

[0040] Example 2

[0041] This embodiment further illustrates the technology. 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 is an arc-shaped structure and is installed on the circumferential side wall of the inner shell 2;

[0042] A through hole is provided on the second air inlet pipe 8, the air outlet end of the first air inlet pipe 7 is installed in the through hole, the second air inlet pipe 8 is connected with 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 ends of the third air inlet pipes 20 penetrate 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] When this embodiment is in use, 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 a plurality of third air inlet pipes 20. The plurality of third air inlet pipes 20 provide hot air at the same time, which is conducive to the flow of hot air in the inner shell 2. At the same time, the third air inlet pipes 20 with a smaller diameter block the soil, thereby preventing the soil from entering the ventilation slot of the rotating rod 6.

[0045] Example 3

[0046] This embodiment further illustrates the technology. Figure 4 As shown, a retaining plate 18 is installed at the air outlet end of the third air inlet pipe 20 through a fixing rod 19. The retaining plate 18 is in an arc structure. The retaining plate 18 covers the air outlet of the third air inlet pipe 20. The retaining plate 18 with an arc structure covers the air outlet of the third air inlet pipe 20, thereby blocking the soil and further preventing the soil from entering the third air inlet pipe 20. When the inner shell 2 rotates slowly, the soil is turned down along the inner side wall of the inner shell 2 under the action of gravity and fully contacts with the hot air. When the soil is turned to the air outlet of the third air inlet pipe 20, most of the soil is The arc-shaped retaining plate 18 blocks a small amount of soil from entering the retaining plate 18, and the third air inlet pipe 20 continuously provides hot air. The distance between the retaining plate 18 and the side wall of the third air inlet pipe 20 is smaller than the inner diameter of the third air inlet pipe 20. The hot air is sent from the large diameter pipe into the small spacing. The thrust of the hot air increases, pushing away the soil entering the retaining plate 18 to prevent the soil from entering the third air inlet pipe 20. The arc-shaped retaining plate 18 can also guide the hot air, so that the hot air covers a larger area, 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. Figure 1 and Figure 5 As shown, both ends of the air outlet pipe 4 are provided with threaded sleeves 21 threadedly matched therewith, and filter plates 22 are vertically fixed in the threaded sleeves 21. The filter plates 22 are detachably installed through the threaded sleeves 21, and the soil is blocked in the inner shell 2 by the filter plates 22 to prevent the dried soil from entering the outer shell 1 through the air outlet pipe 4 along with the hot air. A small number of soil particles with smaller volume move toward the air outlet pipe 4 driven by the hot air, and the soil is blocked by the filter plates 22 on both sides of the air outlet pipe 4. The detachable filter plates 22 are 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) being mounted on the top of the base (9), a second cover plate (23) for closing the outer shell (1) being detachably mounted on the rear side of the outer shell (1), a driving assembly for driving a rotating rod (6) to rotate being arranged on the second cover plate (23), a rotating rod (6) being horizontally installed in the outer shell (1), characterized in that: At least three connecting rods (5) are fixed on the side wall of the rotating rod (6), and the connecting rods (5) are distributed on the side wall of the rotating rod (6) in a circular shape. The ends of the connecting rods (5) are vertically fixed with an inner shell (2), and the inner shell (2) is in a circular tube structure. A first cover plate (14) is detachably mounted on the rear side of the inner shell (2), and a fixing component for fixing plants is arranged on the first cover plate (14). A ventilation slot is opened in the rotating rod (6), and a first air inlet pipe (7) is inserted into each connecting rod (5). The inner shell (2) is connected to the ventilation slot through the corresponding first air inlet pipe (7). An air outlet pipe (4) is inserted into the side wall of the inner shell (2), and one end of the air outlet pipe (4) located in the inner shell (2) is arranged at the center of the inner shell (2). A control component for supplying hot air to the ventilation slot and controlling the hot air circulation in the outer shell (1) is arranged on the front side wall of the outer shell (1).

2. The sample drying device for environmental monitoring laboratory according to claim 1, characterized in that: The control component comprises a fan (10), the fan (10) being mounted on the front side wall of the outer shell (1), the air inlet of the fan (10) being connected to a main pipe (3), the other end of the main pipe (3) being inserted into the top of the outer shell (1), the air outlet of the fan (10) being connected to the ventilation slot of the rotating rod (6), and a dehumidification component for processing moisture in the air being arranged on the main pipe (3).

3. The sample drying device for environmental monitoring laboratory according to claim 2, characterized in that: The dehumidification assembly comprises a dehumidification box (12), which is mounted on the side wall of the outer shell (1) above the fan (10), and at least two dehumidification plates (13) are horizontally fixed in the dehumidification box (12). The dehumidification plates (13) are alternately mounted on the side walls of the dehumidification box (12) and the outer shell (1), and a gap for air flow is left between the dehumidification plates (13) and the side walls of the dehumidification box (12) and the outer shell (1).

4. The sample drying device for environmental monitoring laboratory according to claim 1, characterized in that: A second air inlet pipe (8) is installed on the outer wall of the inner shell (2), a through hole is opened on the second air inlet pipe (8), an 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), and the air outlet end of the third air inlet pipe (20) is inserted into the inner shell (2).

5. The sample drying device for environmental monitoring laboratory according to claim 4, characterized in that: The air outlet end of the third air inlet pipe (20) is mounted with a soil retaining plate (18) via a fixing rod (19); the soil retaining plate (18) is in an arc structure, and the soil retaining plate (18) covers the air outlet of the third air inlet pipe (20).

6. The sample drying device for environmental monitoring laboratory according to claim 1, characterized in that: Both ends of the air outlet pipe (4) are sleeved with threaded sleeves (21) threadably matched therewith, and filter plates (22) are vertically fixed in the threaded sleeves (21).

7. The sample drying device for environmental monitoring laboratory according to claim 1, characterized in that: The driving assembly comprises a rotating shaft (16), the rotating shaft (16) is horizontally installed in the second cover plate (23), a driving member for driving the rotating shaft (16) to rotate is installed on the rear side wall of the second cover plate (23), two plug blocks (17) are fixed to the other end of the rotating shaft (16), and a slot for inserting the plug block (17) is provided at the rear end of the rotating rod (6).

8. The sample drying device for environmental monitoring laboratory according to claim 1, characterized in that: The fixing assembly comprises a cable tie (15), and the cable tie (15) is fixed on the rear side wall of the first cover plate (14).

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