A device and method for facilitating soil collection for flooded poplar rhizosphere soil assays

Abstract

The application discloses a device convenient for collecting soil samples of submerged poplar rhizosphere soil, which comprises a base plate, a fixing mechanism arranged on the base plate, a first through hole formed in the base plate, an outer cylinder fixedly connected in the first through hole, an air inlet formed in the outer cylinder, a gas pump communicated with the air inlet, a guide sleeve fixedly connected in the outer cylinder, a rubber skirt fixedly connected at the bottom of the outer cylinder, and a plurality of sealing rings fixedly connected to the bottom surface of the rubber skirt; the sampling assembly comprises an inner cylinder and a sampling cylinder, the inner cylinder is slidably connected in the guide sleeve, the sampling cylinder is slidably connected in the inner cylinder, a straight rod is arranged on the sampling cylinder, a bottom plate is fixedly connected to the inner cylinder, a power mechanism is arranged on the bottom plate, the power mechanism is in transmission connection with the straight rod, and a cutting mechanism is arranged on the sampling cylinder; a plurality of holding rods are fixedly connected to the bottom plate, and a connecting mechanism is arranged on the base plate. The device can collect rhizosphere soil in water, can reduce the influence of water on the soil sample, and is more convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sampling devices, in particular to a device and method for collecting soil for measuring the rhizosphere soil of poplar trees under waterlogging. BACKGROUND

[0002] With the in-depth of ecological restoration and forestry research, poplar has become a key tree species for ecological reconstruction of wetlands, mudflats and riparian zones due to its fast growth and water tolerance. The study of the physicochemical properties, enzyme activity and microbial community structure of poplar rhizosphere soil, which is the core area of root-microbe interaction, is of great significance to reveal the stress resistance mechanism of tree species and optimize cultivation techniques.

[0003] However, in some seasonal waterlogging areas, it is difficult to measure the physicochemical properties and microorganisms of the soil every year, because the surface soil becomes a thin mud due to rainwater soaking, which is not convenient for sample collection. In addition, the conventional sampler is not convenient for sampling in the waterlogging environment due to the interference of buoyancy, and the sample is easily mixed with the upper water body during the sampling process, causing sample dilution or pollution.

[0004] Therefore, a device and method for collecting soil for measuring the rhizosphere soil of poplar trees under waterlogging are proposed to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a device and method for collecting soil for measuring the rhizosphere soil of poplar trees under waterlogging to solve the problems existing in the prior art and to collect rhizosphere soil in a waterlogging environment.

[0006] To achieve the above purpose, the present application provides the following scheme: the present application provides a device for collecting soil for measuring the rhizosphere soil of poplar trees under waterlogging, comprising:

[0007] A base plate is provided with a fixing mechanism, a first through hole is formed in the base plate, an outer cylinder is fixedly connected in the first through hole, an air inlet is formed in the outer cylinder, an air pump is communicated with the air inlet, a guide sleeve is fixedly connected in the outer cylinder, a rubber skirt is fixedly connected at the bottom of the outer cylinder, and a plurality of sealing rings are fixedly connected to the bottom surface of the rubber skirt.

[0008] A sampling assembly is provided, which comprises an inner cylinder and a sampling cylinder, the inner cylinder is slidingly connected in the guide sleeve, the sampling cylinder is slidingly connected in the inner cylinder, a straight rod is provided on the sampling cylinder, a bottom plate is fixedly connected to the inner cylinder, a power mechanism is provided on the bottom plate and transmissionally connected with the straight rod, and a cutting mechanism is provided on the sampling cylinder; a plurality of handle rods are fixedly connected to the bottom plate, a connecting mechanism is provided on the base plate and detachably connected with the handle rods.

[0009] Preferably, the cutting mechanism includes a plurality of flexible blades, an upper sealing plate is fixedly connected to the top of the sampling cylinder, a plurality of second through holes are provided on the upper sealing plate, a plurality of through grooves are provided on the sampling cylinder, the top of the through grooves communicates with the second through holes, the bottom of the through grooves is located on the side wall of the sampling cylinder, the flexible blades are located in the through grooves, a first connecting rod is fixedly connected to the top of the flexible blades, the first connecting rod extends out of the second through holes, a first support is fixedly connected to the upper sealing plate, a top plate is fixedly connected to the first support, a plurality of first electric telescopic rods are fixedly connected to the bottom surface of the top plate, the output end of the first electric telescopic rods is fixedly connected to the first connecting rod, and the straight rod is fixedly connected to the top plate.

[0010] Preferably, the power mechanism includes several frames, which are slidably mounted on the base plate. A support mechanism is movably mounted within the frames. Two second electric telescopic rods are fixedly connected within the frames, and the second electric telescopic rods are fixedly connected to the bottom and top surfaces of the inner surfaces of the frames. The two second electric telescopic rods are arranged correspondingly. A pressing mechanism is movably mounted on the support mechanism. One end of the pressing mechanism is drivenly connected to the straight rod, and the other end of the pressing mechanism is drivenly connected to the second electric telescopic rod.

[0011] Preferably, the support mechanism includes a first slide groove, which is fixedly connected within the frame. A first slider is slidably connected within the first slide groove. A first motor is fixedly connected within the frame. A first threaded rod is rotatably connected within the slide groove. A first threaded hole is provided on the first slider. The first threaded rod is threadedly connected within the threaded hole. A lifting mechanism is fixedly connected to the first slider. The pressing mechanism is movably connected to the lifting mechanism.

[0012] Preferably, the lifting mechanism includes a second slide groove, which is fixedly connected to the first slide block. A second slide block is slidably connected within the second slide groove. A fixed shaft is fixedly connected to the second slide block, extending out of the second slide groove. A second motor is fixedly connected to the second slide groove. A second threaded rod is rotatably connected within the second slide groove. A second threaded hole is provided on the second slide block. The second threaded rod is threadedly connected within the second threaded hole. The output shaft of the second motor is fixedly connected to the second threaded rod. The pressing mechanism is movably connected to the fixed shaft.

[0013] Preferably, the pressing mechanism includes an elastic pressing rod with a third through hole. The fixed shaft passes through the third through hole. One end of the elastic pressing rod is rotatably connected to a connecting plate, and a push plate is fixedly connected to the connecting plate. The other end of the elastic pressing rod is fixedly connected to two electromagnets, which are located on the upper and lower end faces of the pressing rod. A metal plate is fixedly connected to the output end of the second electric telescopic rod. A first rack is fixedly connected to the push plate, and several second racks are fixedly connected to the straight rod. The first rack and the second rack mesh with each other.

[0014] Preferably, the elastic pressing rod includes a rod body with a cavity and a fourth through hole. The cavity and the fourth through hole are connected. A movable rod is inserted into the fourth through hole. A limit block is fixedly connected to the cavity. A spring is placed in the cavity. One end of the spring abuts against the limit block, and the other end of the spring abuts against the cavity. A third through hole is formed on the rod body. A connecting plate is rotatably connected to the movable rod.

[0015] Preferably, the connecting mechanism includes a second connecting plate, which is fixedly connected to the base plate, and a third connecting plate is rotatably connected to the second connecting plate. A rubber ring is fixedly connected to the third connecting plate, and the rubber ring is detachably connected to the handle.

[0016] Preferably, the fixing mechanism includes a plurality of drill rods, a spiral blade is fixedly connected to the bottom end of the drill rod, a plurality of through holes are opened on the base plate, the drill rods pass through the through holes, a stop block is fixedly fixed to the top end of the drill rod, and a handle is fixedly connected to the stop block.

[0017] A method for collecting soil samples for testing the rhizosphere soil of poplar trees under floodwater includes the following steps:

[0018] Step 1: Place the substrate in water, start the air pump, and introduce air into the outer cylinder through the air pump. Slowly press the substrate down so that the rubber skirt at the bottom of the outer cylinder contacts the mud at the bottom of the water. As the outer cylinder moves down, the airflow inside will cause the water inside the outer cylinder to be discharged.

[0019] Step 2: Use a fixing mechanism to fix the substrate to the bottom of the water;

[0020] Step 3: Press down on the bottom plate with the handle to move the inner cylinder downwards until it reaches the lowest point, and then connect it to the handle using the connecting mechanism;

[0021] Step 4: Drive the straight rod downward through the power mechanism. The straight rod drives the sampling tube downward, so that the sampling tube is inserted into the bottom mud for sampling. After the sampling tube is completely inserted into the bottom mud, use the cutting mechanism to cut the mud inside the sampling tube from the mud outside.

[0022] Step 5: Lift the sampling cylinder using the power mechanism, disconnect the connection between the connecting mechanism and the handle, and raise the inner cylinder until it is removed from the outer cylinder.

[0023] This invention discloses the following technical effects: In this device, the fixing mechanism is used to fix the substrate, the outer cylinder is used to isolate water, and the rubber skirt is used to adhere to the mud at the bottom of the water. Air is blown into the outer cylinder by an air pump, and the water inside the outer cylinder is discharged through the air. During the inflation of the outer cylinder and the pressing of the substrate, the sealing ring can increase the sealing between the rubber skirt and the mud at the bottom of the water. After the rubber skirt contacts the mud at the bottom of the water and the water inside the outer cylinder is basically discharged, the fixing mechanism is used to fix the substrate to the mud at the bottom of the water; the guide sleeve facilitates the inner... The sampling tube moves within the outer cylinder and is used to insert into the soil for sampling. A power mechanism drives a straight rod, which can insert or pull the sampling tube into the soil. A cutting mechanism separates the soil inside the sampling tube from the outer soil. When cutting the soil sample, the cutting mechanism only needs to create a disconnect between the soil inside and outside the sampling tube to prevent the sample soil from being sucked out when the sampling tube is raised. After sampling is complete, the sampling tube is raised into the inner cylinder, and then the inner cylinder is pulled out from the outer cylinder. This invention enables the collection of rhizosphere soil in water while reducing the impact of water on the soil sample, making it more convenient to use. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the device for facilitating soil collection and measurement of the rhizosphere soil of poplar trees under floodwater.

[0026] Figure 2 for Figure 1 Enlarged view of point a in the middle;

[0027] Figure 3 for Figure 2 Enlarged view of point c in the middle;

[0028] Figure 4 for Figure 1 Enlarged view of point b in the middle;

[0029] Figure 5 for Figure 4 Enlarged view of point d in the middle;

[0030] Among them, 1. base plate; 2. outer cylinder; 3. air inlet; 4. guide sleeve; 5. rubber skirt; 6. sealing ring; 7. inner cylinder; 8. sampling cylinder; 9. straight rod; 10. base plate; 11. handle; 12. flexible knife; 13. upper sealing plate; 14. through groove; 15. first connecting rod; 16. first support column; 17. top plate; 18. first electric telescopic rod; 19. frame; 20. second electric telescopic rod; 21. first slide groove; 22. first slider; 23. first motor; 24. first threaded rod; 2 5. Second slide rail; 26. Second slider; 27. Fixed shaft; 28. Second motor; 29. ​​Second threaded rod; 30. Top pressure rod; 31. Connecting plate one; 32. Push plate; 33. Electromagnet; 34. Metal plate; 35. First rack; 36. Second rack; 37. Third electric telescopic rod; 38. Dovetail groove; 39. Third slider; 40. Base; 41. Connecting plate two; 42. Connecting plate three; 43. Rubber ring; 44. Drill rod; 45. Spiral blade; 46. Stop block; 47. Handle. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figures 1-5 This invention provides a device for facilitating the collection of soil samples from the rhizosphere of poplar trees under floodwater, comprising:

[0034] A base plate 1 is provided with a fixing mechanism. A first through hole is opened on the base plate 1. An outer cylinder 2 is fixedly connected in the first through hole. An air inlet 3 is opened on the outer cylinder 2. An air pump is connected to the air inlet 3. A guide sleeve 4 is fixedly connected in the outer cylinder 2. A rubber skirt 5 is fixedly connected to the bottom of the outer cylinder 2. Several sealing rings 6 are fixedly connected to the bottom surface of the rubber skirt 5.

[0035] The sampling assembly includes an inner cylinder 7 and a sampling cylinder 8. The inner cylinder 7 is slidably connected to the guide sleeve 4, and the sampling cylinder 8 is slidably connected to the inner cylinder 7. A straight rod 9 is provided on the sampling cylinder 8. A base plate 10 is fixedly connected to the inner cylinder 7. A power mechanism is provided on the base plate 10 and is connected to the straight rod 9. A cutting mechanism is provided on the sampling cylinder 8. Several gripping rods 11 are fixedly connected to the base plate 10. A connecting mechanism is provided on the base plate 1 and is detachably connected to the gripping rods 11.

[0036] In this device, the fixing mechanism is used to fix the base plate 1, the outer cylinder 2 is used to isolate water, the rubber skirt 5 is used to fit with the mud at the bottom of the water, and the air pump (not shown in the figure) blows air into the outer cylinder 2 through the air supply pipe to expel the water in the outer cylinder 2. During the process of inflating the outer cylinder 2 and pressing down the base plate 1, the operator needs to hold the rod 11 to prevent the inner cylinder 7 from being pushed out of the outer cylinder 2 by the airflow. The sealing ring 6 can increase the sealing between the rubber skirt 5 and the mud at the bottom of the water. After the rubber skirt 5 comes into contact with the mud at the bottom of the water and the water in the outer cylinder 2 is basically discharged, the fixing mechanism is used to fix the base plate 1 on the mud at the bottom of the water.

[0037] The guide sleeve 4 facilitates the movement of the inner cylinder 7 within the outer cylinder 2. The sampling cylinder 8 is used to insert into the soil for sampling. The power mechanism drives the straight rod 9. The movement of the straight rod 9 can insert the sampling cylinder 8 into the soil or pull it out of the soil. The cutting mechanism is used to separate the soil inside the sampling cylinder 8 from the soil outside. When cutting the soil sample, the cutting mechanism only needs to create a break between the soil inside the sampling cylinder 8 and the soil outside. This can prevent the soil sample inside the sampling cylinder 8 from being sucked out when the sampling cylinder 8 is raised. After the sampling cylinder 8 has finished sampling, it is raised into the inner cylinder 7, and then the inner cylinder 7 is pulled out of the outer cylinder 2.

[0038] The scheme is further optimized. The cutting mechanism includes several flexible blades 12. The top of the sampling cylinder 8 is fixedly connected to an upper sealing plate 13. Several second through holes are opened on the upper sealing plate 13. Several through grooves 14 are opened on the sampling cylinder 8. The top of the through grooves 14 communicates with the second through holes. The bottom of the through grooves 14 is located on the side wall of the sampling cylinder 8. The flexible blades 12 are located in the through grooves 14. The top of the flexible blades 12 is fixedly connected to a first connecting rod 15. The first connecting rod 15 extends out of the second through holes. A first support column 16 is fixedly connected to the upper sealing plate 13. A top plate 17 is fixedly connected to the first support column 16. Several first electric telescopic rods 18 are fixedly connected to the bottom surface of the top plate 17. The output end of the first electric telescopic rod 18 is fixedly connected to the first connecting rod 15. A straight rod 9 is fixedly connected to the top plate 17.

[0039] The first electric telescopic rod 18 extends or retracts, causing the first connecting rod 15 to rise or fall. When the sampling cylinder 8 is inserted into the soil to a specified depth, the first electric telescopic rod 18 is activated, extending and the first connecting rod 15 drives the flexible blade 12 to move downwards and extend out of the through groove 14, inserting it into the soil inside the sampling cylinder 8. After the first electric telescopic rod 18 extends to its position, it retracts, causing the flexible blade 12 to also retract into the through groove 14. With a gap separating the soil sample inside the sampling cylinder 8, the soil sample is no longer easily sucked out when the sampling cylinder 8 is raised. When using the flexible blade 12, it should be used one at a time; multiple flexible blades 12 should not be extended simultaneously to prevent collisions. The upper sealing plate 13 has a small vent hole for easy venting during sampling.

[0040] The scheme is further optimized. The power mechanism includes several frames 19, which are slidably mounted on the base plate 10. A support mechanism is movably mounted inside the frame 19. Two second electric telescopic rods 20 are fixedly connected inside the frame 19. The second electric telescopic rods 20 are fixedly connected to the bottom and top surfaces inside the frame 19. The two second electric telescopic rods 20 are arranged correspondingly. A pressing mechanism is movably mounted on the support mechanism. One end of the pressing mechanism is connected to the straight rod 9, and the other end of the pressing mechanism is connected to the second electric telescopic rod 20.

[0041] The support mechanism is used to support the pressing mechanism. The support mechanism can move within the frame 19, thereby adjusting the position of the pressing mechanism. The second electric telescopic rod 20 drives the pressing mechanism to move, and the pressing mechanism drives the straight rod 9 to move, so as to realize the raising or lowering of the straight rod 9.

[0042] The scheme is further optimized. The support mechanism includes a first slide groove 21, which is fixedly connected to the frame 19. A first slider 22 is slidably connected in the first slide groove 21. A first motor 23 is fixedly connected in the frame 19. A first threaded rod 24 is rotatably connected in the slide groove. A first threaded hole is opened on the first slider 22. The first threaded rod 24 is threadedly connected in the threaded hole. A lifting mechanism is fixedly connected to the first slider 22. A pressing mechanism is movably connected to the lifting mechanism.

[0043] The first motor 23 drives the first threaded rod 24 to rotate. When the first threaded rod 24 rotates, it causes the first slider 22 to move, thereby realizing the movement of the lifting mechanism.

[0044] The scheme is further optimized. The lifting mechanism includes a second slide groove 25, which is fixedly connected to the first slider 22. A second slider 26 is slidably connected inside the second slide groove 25. A fixed shaft 27 is fixedly connected to the second slider 26 and extends out of the second slide groove 25. A second motor 28 is fixedly connected to the second slide groove 25. A second threaded rod 29 is rotatably connected inside the second slide groove 25. A second threaded hole is opened on the second slider 26. The second threaded rod 29 is threadedly connected to the second threaded hole. The output shaft of the second motor 28 is fixedly connected to the second threaded rod 29. The pressing mechanism is movably connected to the fixed shaft 27.

[0045] The second motor 28 drives the second threaded rod (not shown in the figure) to rotate. When the second threaded rod (not shown in the figure) rotates, it will cause the second slider (not shown in the figure) to move up and down. The second slider (not shown in the figure) drives the fixed shaft 27 to move up and down, thereby adjusting the position of the pressing mechanism.

[0046] The scheme is further optimized. The pressing mechanism includes an elastic pressing rod 30. The elastic pressing rod 30 has a third through hole. The fixed shaft 27 passes through the third through hole. One end of the elastic pressing rod 30 is rotatably connected to a connecting plate 31. A push plate 32 is fixedly connected to the connecting plate 31. Two electromagnets 33 are fixedly connected to the other end of the elastic pressing rod 30. The electromagnets 33 are located on the upper and lower end faces of the elastic pressing rod 30. A metal plate 34 is fixedly connected to the output end of the second electric telescopic rod 20. A first rack 35 is fixedly connected to the push plate 32. Several second racks 36 are fixedly connected to the straight rod 9. The first rack 35 and the second rack 36 mesh with each other.

[0047] The fixed shaft 27 is inserted into the third through hole, allowing the elastic pressing rod 30 to rotate around the fixed shaft 27. When the electromagnet 33 is energized, it will attract the metal plate 34. When the second electric telescopic rod 20 is needed to work, the electromagnet 33 connected to it is energized. When the second electric telescopic rod 20 extends, it will push the elastic pressing rod 30 to rotate. The other end of the elastic pressing rod 30 is rotatably connected to the push plate 32, which will also move. When the first rack 35 and the second rack 36 mesh, the straight rod 9 will move up or down.

[0048] The scheme is further optimized. The elastic top pressure rod 30 includes a rod body 37. A cavity and a fourth through hole are opened on the rod body 37. The cavity and the fourth through hole are connected. A movable rod 38 is inserted into the fourth through hole. A limit block 39 is fixedly connected in the cavity. A spring 40 is placed in the cavity. One end of the spring 40 abuts against the limit block 39, and the other end of the spring 40 abuts against the cavity. A third through hole is opened on the rod body 37. A connecting plate 31 is rotatably connected to the movable rod 38.

[0049] When rod 37 rotates, the distance between rod 37 and straight rod 9 will shorten, and movable rod 38 will be compressed into the cavity inside rod 37. When one end of rod 37 rotates away from straight rod 9, spring 40 will cause movable rod 38 to extend out of the cavity.

[0050] The scheme is further optimized. The connecting mechanism includes a second connecting plate 41, which is fixedly connected to the base plate 1. A third connecting plate 42 is rotatably connected to the second connecting plate 41. A rubber ring 43 is fixedly connected to the third connecting plate 42. The rubber ring 43 is detachably connected to the handle 11.

[0051] When it is necessary to fix the position of the base plate 10, simply put the rubber ring 43 on the handle 11.

[0052] The solution is further optimized. The fixing mechanism includes several drill rods 44. The bottom end of the drill rod 44 is fixedly connected to a spiral blade 45. Several through holes are opened on the base plate 1. The drill rods 44 are inserted into the through holes. A stop block 46 is fixedly fixed to the top end of the drill rod 44. A handle 47 is fixedly connected to the stop block 46.

[0053] When it is necessary to fix the substrate 1, the operator turns the handle 47 to make the spiral blade 45 at the bottom of the drill rod 44 enter the soil, thereby fixing the substrate 1.

[0054] A method for collecting soil samples for testing the rhizosphere soil of poplar trees under floodwater includes the following steps:

[0055] Step 1: Place substrate 1 in water, start the air pump, and introduce air into the outer cylinder 2 through the air pump. Slowly press substrate 1 down so that the rubber skirt 5 at the bottom of the outer cylinder 2 comes into contact with the mud at the bottom of the water. The sealing ring 6 can increase the sealing between the rubber skirt 5 and the mud at the bottom of the water. During the pressing of substrate 1, the staff should hold the rod 11 to prevent the inner cylinder 7 from being pushed out of the outer cylinder 2 by the airflow. The exhaust hole on the upper sealing plate 13 does not affect the drainage of the outer cylinder 2. The air pressure provided by the air pump is sufficient to drain the water in the outer cylinder 2. The outer cylinder 2 is also in a pressure-maintaining state during the sampling process.

[0056] Step 2: After the rubber skirt 5 comes into contact with the mud at the bottom of the water and the water in the outer cylinder 2 is basically drained, the fixing mechanism is used to fix the substrate 1 at the bottom of the water. Specifically, the operator turns the handle 47 so that the spiral blade 45 at the bottom of the drill rod 44 enters the mud, thereby fixing the substrate 1.

[0057] Step 3: Press down the bottom plate 10 with the handle 11 to move the inner cylinder 7 downward until it reaches the lowest point. Use the connecting mechanism to connect with the handle 11. Specifically, put the rubber ring 43 on the handle 11.

[0058] Step four: During the sampling process, when the straight rod 9 needs to be moved downwards, the electromagnet 33 below is energized. The electromagnet 33 below will attract the metal plate 34 on the second electric telescopic rod 20 below. Then, the first motor 23 is started, which drives the first threaded rod 24 to rotate. The first threaded rod 24 drives the first slider 22 and the second slide groove 25 to move towards the straight rod 9, so that the first rack 35 and the second rack 36 mesh. The second electric telescopic rod 20 is then started, and it extends. The second electric telescopic rod 20 pushes the electromagnet 33 below and the rod body 37 to move. The rod body 37 rotates around the fixed axis 27, and the other end of the rod body 37... The moving rod 38 and the push plate 32 will rotate downwards. Through the engagement of the first rack 35 and the second rack 36, the straight rod 9 will move downwards. When the second electric telescopic rod 20 is extended to its full position, the first motor 23 will rotate, causing the first slider 22 and the second slide groove 25 to move away from the straight rod 9, thereby separating the first rack 35 and the second rack 36. Then the second electric telescopic rod 20 will retract. When the second electric telescopic rod 20 is retracted to its full position, the first motor 23 will be restarted, causing the first slider 22 and the second slide groove 25 to move towards the straight rod 9 until the first rack 35 and the second rack 36 engage. The process of extending the second electric telescopic rod 20 is repeated, and the process of moving the straight rod 9 downwards is repeated.

[0059] When you need to move rod 9 upwards, simply reverse the operation.

[0060] The straight rod 9 drives the sampling cylinder 8 to move downward, so that the sampling cylinder 8 is inserted into the bottom mud for sampling. When the sampling cylinder 8 is fully inserted into the bottom mud, the first electric telescopic rod 18 is activated. The first electric telescopic rod 18 extends, and the first connecting rod 15 drives the flexible knife 12 to move downward and extend out of the through groove 14, inserting into the mud in the sampling cylinder 8. After the first electric telescopic rod 18 extends to the end, it retracts, so that the flexible knife 12 also retracts into the through groove 14. After there is a gap for separation of the mud sample in the sampling cylinder 8, when the sampling cylinder 8 is raised, the mud sample is no longer easily sucked out.

[0061] Step 5: Lift the sampling cylinder 8 using the power mechanism, disconnect the rubber ring 43 from the handle 11, and raise the inner cylinder 7 until the inner cylinder 7 is removed from the outer cylinder 2.

[0062] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0063] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims.

Claims

1. A device for facilitating soil sampling and testing at the rhizosphere of poplar trees under floodwater, characterized in that, include: A base plate (1) is provided with a fixing mechanism. A first through hole is provided on the base plate (1). An outer cylinder (2) is fixedly connected in the first through hole. An air inlet (3) is provided on the outer cylinder (2). An air pump is connected to the air inlet (3). A guide sleeve (4) is fixedly connected in the outer cylinder (2). A rubber skirt (5) is fixedly connected to the bottom of the outer cylinder (2). Several sealing rings (6) are fixedly connected to the bottom surface of the rubber skirt (5). The sampling assembly includes an inner cylinder (7) and a sampling cylinder (8). The inner cylinder (7) is slidably connected to the guide sleeve (4), and the sampling cylinder (8) is slidably connected to the inner cylinder (7). A straight rod (9) is provided on the sampling cylinder (8). A base plate (10) is fixedly connected to the inner cylinder (7). A power mechanism is provided on the base plate (10). The power mechanism is connected to the straight rod (9) in a transmission manner. A cutting mechanism is provided on the sampling cylinder (8). A plurality of gripping rods (11) are fixedly connected to the base plate (10). A connecting mechanism is provided on the base plate (1). The connecting mechanism is detachably connected to the gripping rods (11). The cutting mechanism includes several flexible blades (12), the top of the sampling cylinder (8) is fixedly connected to an upper sealing plate (13), the upper sealing plate (13) is provided with several second through holes, the sampling cylinder (8) is provided with several through grooves (14), the top of the through grooves (14) communicates with the second through holes, the bottom of the through grooves (14) is located on the side wall of the sampling cylinder (8), the flexible blades (12) are located in the through grooves (14), the top of the flexible blades (12) is fixedly connected to a first connecting rod (15), the first connecting rod (15) extends out of the second through hole, the upper sealing plate (13) is fixedly connected to a first support column (16), the first support column (16) is fixedly connected to a top plate (17), the bottom surface of the top plate (17) is fixedly connected to several first electric telescopic rods (18), the output end of the first electric telescopic rods (18) is fixedly connected to the first connecting rods (15), and the straight rod (9) is fixedly connected to the top plate (17); The power mechanism includes several frames (19), which are slidably mounted on the base plate (10). A support mechanism is movably mounted inside the frame (19). Two second electric telescopic rods (20) are fixedly connected inside the frame (19). The second electric telescopic rods (20) are fixedly connected to the bottom surface and the top surface inside the frame (19). The two second electric telescopic rods (20) are arranged correspondingly. A pressing mechanism is movably mounted on the support mechanism. One end of the pressing mechanism is connected to the straight rod (9) and the other end of the pressing mechanism is connected to the second electric telescopic rod (20). The support mechanism includes a first slide groove (21), which is fixedly connected to the frame (19). A first slider (22) is slidably connected in the first slide groove (21). A first motor (23) is fixedly connected in the frame (19). A first threaded rod (24) is rotatably connected in the slide groove. A first threaded hole is provided on the first slider (22). The first threaded rod (24) is threadedly connected in the threaded hole. A lifting mechanism is fixedly connected to the first slider (22). The pressing mechanism is movably connected to the lifting mechanism. The lifting mechanism includes a second slide groove (25), which is fixedly connected to the first slider (22). A second slider is slidably connected in the second slide groove (25). A fixed shaft (27) is fixedly connected to the second slider. The fixed shaft (27) extends out of the second slide groove (25). A second motor (28) is fixedly connected to the second slide groove (25). A second threaded rod is rotatably connected in the second slide groove (25). A second threaded hole is opened on the second slider (26). The second threaded rod is threadedly connected in the second threaded hole. The output shaft of the second motor (28) is fixedly connected to the second threaded rod. The pressing mechanism is movably connected to the fixed shaft (27).

2. The device for facilitating soil collection and testing of rhizosphere soil of poplar trees under floodwater, as described in claim 1, is characterized in that: The pressing mechanism includes an elastic pressing rod (30), which has a third through hole. The fixed shaft (27) passes through the third through hole. One end of the elastic pressing rod (30) is rotatably connected to a connecting plate (31), and a push plate (32) is fixedly connected to the connecting plate (31). The other end of the elastic pressing rod (30) is fixedly connected to two electromagnets (33), which are located on the upper and lower end faces of the elastic pressing rod (30). The output end of the second electric telescopic rod (20) is fixedly connected to a metal plate (34). A first rack (35) is fixedly connected to the push plate (32), and several second racks (36) are fixedly connected to the straight rod (9). The first rack (35) and the second rack (36) mesh with each other.

3. The device for facilitating soil collection and testing of rhizosphere soil of poplar trees under floodwater, as described in claim 2, is characterized in that: The elastic top pressure rod (30) includes a rod body (37), on which a cavity and a fourth through hole are provided. The cavity and the fourth through hole are connected. A movable rod (38) is inserted into the fourth through hole. A limit block (39) is fixedly connected in the cavity. A spring (40) is placed in the cavity. One end of the spring (40) abuts against the limit block (39), and the other end of the spring (40) abuts against the cavity. A third through hole is opened on the rod body (37). A connecting plate (31) is rotatably connected to the movable rod (38).

4. The device for facilitating soil collection and testing of rhizosphere soil of poplar trees under floodwater, as described in claim 1, is characterized in that: The connecting mechanism includes a second connecting plate (41), which is fixedly connected to the base plate (1). A third connecting plate (42) is rotatably connected to the second connecting plate (41), and a rubber ring (43) is fixedly connected to the third connecting plate (42). The rubber ring (43) is detachably connected to the handle (11).

5. The device for facilitating soil collection and testing of rhizosphere soil of poplar trees under floodwater, as described in claim 1, is characterized in that: The fixing mechanism includes several drill rods (44), with a spiral blade (45) fixedly connected to the bottom end of each drill rod (44). Several through holes are provided on the substrate (1), and the drill rods (44) pass through the through holes. A stop block is fixed to the top end of each drill rod (44), and a handle (29) is fixedly connected to the stop block.

6. A method for collecting soil samples for measuring the rhizosphere soil of poplar trees under floodwater, based on the device for collecting soil samples for measuring the rhizosphere soil of poplar trees under floodwater as described in claim 1, characterized in that, Includes the following steps: Step 1: Place the substrate (1) in water, start the air pump, and introduce gas into the outer cylinder (2) through the air pump. Slowly press the substrate (1) down so that the rubber skirt (5) at the bottom of the outer cylinder (2) comes into contact with the mud at the bottom of the water. During the downward movement of the outer cylinder (2), the airflow inside will cause the water inside the outer cylinder (2) to be discharged. Step 2: Use a fixing mechanism to fix the substrate (1) to the bottom of the water; Step 3: Press down the bottom plate (10) with the handle (11) to move the inner cylinder (7) downward until it reaches the lowest point, and connect it with the handle (11) using the connecting mechanism; Step 4: Drive the straight rod (9) downward through the power mechanism. The straight rod (9) drives the sampling tube (8) downward, so that the sampling tube (8) is inserted into the bottom mud for sampling. After the sampling tube (8) is completely inserted into the bottom mud, use the cutting mechanism to cut the mud inside the sampling tube (8) from the mud outside. Step 5: Lift the sampling cylinder (8) using the power mechanism, disconnect the connection between the connecting mechanism and the handle (11), and lift the inner cylinder (7) until the inner cylinder (7) is removed from the outer cylinder (2).

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