A device for sampling different soil layers of plant soil and implementation method thereof

Abstract

The present invention relates to the field of soil sampling technology, and in particular to a device for sampling different soil layers of plant soil and an implementation method thereof. The device for sampling different soil layers of plant soil comprises: a guide tube, a cone head, an inner rod, a sampling tube, a bending sheet and a top cover. The guide tube is in the shape of a hollow long tube, which is used to be inserted into the soil for guidance. The bottom of the guide tube is fixedly connected with a cone head, and an inner rod is arranged inside the guide tube. The bottom end of the inner rod is connected with a sampling tube through a connecting mechanism for collecting soil samples. The device for sampling different soil layers of plant soil and an implementation method thereof provided by the present invention can accurately control the sampling depth through the cooperation of the inner rod and the sampling tube, and realize sampling of different soil layers. The device has a simple design and is easy to operate. The user only needs to perform simple operations to realize sampling. Through the insertion of the cone head and the sealing of the sampling tube, the damage to the soil structure can be minimized during the sampling process, and the originality of the sample can be maintained.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, and in particular to a device for sampling different soil layers of plant soil and an implementation method thereof. Background Art

[0002] In the study of botany, soil science and agricultural science, it is crucial to analyze soil samples at different soil layers. The properties and composition of soil often change with depth, so specific tools are needed to accurately collect soil samples from different soil layers. Traditional soil sampling methods often use manual digging or simple samplers. This method is inefficient and easily damages the soil structure, resulting in sample distortion, low sampling accuracy, and inability to adapt to the sampling needs of different soil layers. In recent years, with the advancement of science and technology, some intelligent soil sampling devices have been developed to improve the shortcomings of traditional sampling methods. However, these devices are often complicated to operate and expensive.

[0003] Therefore, it is necessary to provide a new device for sampling different soil layers of plant soil and its implementation method to solve the above technical problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a device for sampling different soil layers of plant soil and an implementation method thereof.

[0005] The device for sampling different soil layers of plant soil provided by the present invention comprises:

[0006] The guide tube is in the shape of a hollow long tube and is used for inserting into the soil for guidance;

[0007] Cone head, the bottom of the guide cylinder is fixedly connected with a cone head;

[0008] An inner rod is provided inside the guide cylinder;

[0009] The sampling cylinder, the bottom end of the inner rod is connected to the sampling cylinder through a connecting mechanism, and is used to collect soil samples. Bend pieces are equidistantly arranged at the bottom of the sampling cylinder;

[0010] Bending pieces are equidistantly arranged at the bottom of the sampling tube. The bending pieces are unfolded in a petal shape in the initial state, and the bending pieces are located inside the cone head. When the inner rod is pressed down, the bending pieces are affected by the cone head skeleton, and are bent and fitted to each other to form a closed hollow cone.

[0011] A top cover is arranged on the top of the guide cylinder, a groove is opened on one side of the top cover, and the inner rod is slidably connected inside the groove.

[0012] Preferably, the cone head is provided with a conical frame, and the cone head is connected to the bottom of the guide tube by means of threads, and the outer side of the cone head is hollowed out.

[0013] Preferably, a pointed cone block is provided at the bottom of the cone head.

[0014] Preferably, snap locks are provided on both sides of the top cover, and buckles are provided on both sides of the top of the guide cylinder, and the snap locks cooperate with the corresponding buckles.

[0015] Preferably, holding rods are provided on both sides of the inner rod and the top of the guide cylinder.

[0016] Preferably, a limiting ring is sleeved equidistantly on the outer side of the inner rod, and the limiting ring is slidably connected to the inside of the guide cylinder.

[0017] Preferably, a fixing seat is provided on the top of the top cover, a latch is slidably connected inside the fixing seat, positioning holes are equidistantly provided on the surface of the inner rod, the latch is slidably plugged into the corresponding positioning holes, a first spring is sleeved on the outside of the latch, and the latch is elastically connected to the fixing seat through the first spring.

[0018] Preferably, the connecting mechanism includes a plug-in joint, a plug-in cylinder, a sliding cylinder, a second spring and a ball block. The top of the sampling cylinder is fixedly connected to the plug-in cylinder, the bottom end of the inner rod is provided with a plug-in joint, an annular groove is provided on the outside of the plug-in joint, a sliding cylinder is slidably connected to the outside of the plug-in cylinder, a second spring is provided between the plug-in cylinder and the sliding cylinder, the sliding cylinder is elastically connected to the plug-in cylinder through the second spring, the plug-in cylinder is equidistantly connected to the ball blocks in the circumferential direction, and the ball blocks are connected to the inside and outside of the plug-in cylinder, one side of the ball block is embedded in the annular groove, and the other side of the ball block fits with the inner wall of the sliding cylinder.

[0019] Preferably, the top of the holding rod on one side of the guide cylinder is rotatably connected to a guide wheel, a traction rope is wrapped around the outside of the guide wheel, one end of the traction rope is fixedly connected to the pin, the bottom of the holding rod on one side of the guide cylinder is rotatably connected to an adjustment handle, one end of the adjustment handle is fixedly connected to a tilting rod, and the bottom end of the traction rope passes through the corresponding holding rod and is fixedly connected to the tilting rod.

[0020] The present invention also provides an implementation method of a device for sampling different soil layers of plant soil, and the specific steps are as follows:

[0021] S1. Inserting into the soil: Align the cone head with the soil position to be sampled, and use the pointed cone block at the bottom of the cone head to insert the device into the soil; gently rotate the guide cylinder, and use the cone-shaped frame of the cone head and the hollow design around it to make it easier to insert the device into the soil;

[0022] S2. Adjust the sampling depth: When the device reaches the depth of the soil layer to be sampled, lift the inner rod by holding the rod until the bent piece is free from the constraint of the cone head and resumes the petal-like expansion. At this time, the soil sample can freely enter the interior of the sampling tube;

[0023] S3. Fix the inner rod: pull the latch on the top cover upwards to remove it from the positioning hole that controls the closed state of the bending piece, and insert the latch into another positioning hole that controls the open state of the bending piece to fix the position of the inner rod and ensure that the bottom of the sampling tube is open;

[0024] S4, continue sampling: continue to press down the guide tube to make the cone head further inserted into the soil, and the soil sample enters the sampling tube through the hollowing. If necessary, steps S2 and S3 can be repeated to collect soil samples from different soil layers;

[0025] S5. Close the sampling tube: When the predetermined sampling volume or depth is reached, pull the latch again to remove it from the positioning hole that controls the opening state of the bending piece, press down the inner rod, insert the latch into the positioning hole that controls the closing state of the bending piece, so that the bending pieces are bent and fitted to each other to form a closed hollow cone, thereby ensuring that the soil sample is completely collected inside the sampling tube;

[0026] S6. Take out the sample: pull out the guide tube, remove the top cover, take out the inner rod and the sampling tube from the guide tube, and carefully pour out the soil sample in the sampling tube for subsequent analysis;

[0027] S7. Cleaning and maintenance: Clean the soil residue on each part of the device, especially the cone head and the inside of the sampling tube. Check whether the device is damaged or worn. If necessary, replace or repair it in time. Store the device in a dry and ventilated place for next use.

[0028] Compared with the related art, the device for sampling different soil layers of plant soil and the implementation method thereof provided by the present invention have the following beneficial effects:

[0029] The present invention provides a device for sampling different soil layers of plant soil and an implementation method thereof. Firstly, through the cooperation of an inner rod and a sampling tube, the sampling depth can be accurately controlled to achieve sampling of different soil layers. The device is simple in design and easy to operate. The user only needs to perform simple operations to achieve sampling. Through the insertion of a cone head and the sealing of the sampling tube, the damage to the soil structure can be minimized during the sampling process to maintain the originality of the sample. In addition, the device can adapt to the sampling needs of different soil types and has good versatility and adaptability. Secondly, through rapid insertion and sampling operations, the efficiency of soil sampling can be greatly improved, saving research time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of the device for sampling different soil layers of plant soil provided by the present invention;

[0031] Figure 2 for Figure 1 The structure of region A is shown as an enlarged schematic diagram;

[0032] Figure 3 for Figure 1 The schematic diagram of the structural disassembly of the bottom of the guide cylinder and the cone head shown;

[0033] Figure 4 for Figure 1A partial structural sectional view of the guide cylinder shown;

[0034] Figure 5 for Figure 4 A structural cross-sectional view of the connecting mechanism shown;

[0035] Figure 6 This is a structural cross-sectional view of the bending sheet provided by the present invention after it is unfolded.

[0036] Numbers in the figure: 1. guide cylinder; 2. cone head; 3. inner rod; 4. sampling cylinder; 5. connecting mechanism; 6. bending piece; 7. top cover; 8. groove; 9. hollow; 10. pointed cone block; 11. snap lock; 12. buckle; 13. holding rod; 14. limiting ring; 15. fixing seat; 16. latch; 17. positioning hole; 18. first spring; 19. plug connector; 20. plug-in cylinder; 21. slide cylinder; 22. second spring; 23. ball block; 24. annular groove; 25. guide wheel; 26. traction rope; 27. adjustment handle; 28. tilting rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0039] See also Figures 1 to 6 , a device for sampling different soil layers of plant soil, the device for sampling different soil layers of plant soil comprising:

[0040] Guide tube 1: The guide tube 1 is in the shape of a hollow long tube and is used to be inserted into the soil for guidance;

[0041] A cone head 2 is fixedly connected to the bottom of the guide cylinder 1;

[0042] An inner rod 3 is provided inside the guide cylinder 1;

[0043] The bottom end of the inner rod 3 is connected to the sampling tube 4 through a connecting mechanism 5, and is used to collect soil samples. The bottom of the sampling tube 4 is provided with bending pieces 6 at equal distances;

[0044] Bending pieces 6 are equidistantly provided at the bottom of the sampling tube 4. The bending pieces 6 are unfolded in a petal shape in the initial state, and the bending pieces 6 are located inside the cone head 2. When the inner rod 3 is pressed down, the bending pieces 6 are affected by the skeleton of the cone head 2, and are bent and fitted to each other to form a closed hollow cone;

[0045] A top cover 7 is provided on the top of the guide cylinder 1 , a groove 8 is provided on one side of the top cover 7 , and the inner rod 3 is slidably connected inside the groove 8 .

[0046] It should be noted that: by pressing down the inner rod 3, the bending piece 6 is squeezed by the skeleton of the cone head 2, and they bend and fit together to form a closed hollow cone. This structure can ensure that during the sampling process, the soil sample is completely collected inside the sampling tube 4 to avoid sample leakage.

[0047] See also Figures 1 to 6 The cone head 2 is provided with a conical frame, and the cone head 2 is connected to the bottom of the guide tube 1 by a thread, and a hollow 9 is provided around the outer side of the cone head 2;

[0048] It should be noted that the shape of the cone head 2 facilitates soil entry and guides the bending piece 6 to deform;

[0049] See also Figures 1 to 6 , a pointed cone block 10 is provided at the bottom of the cone head 2;

[0050] It should be noted that the pointed cone block 10 can assist the sampling device to be smoothly inserted into the soil;

[0051] See also Figures 1 to 6 , snap locks 11 are provided on both sides of the top cover 7, and buckles 12 are provided on both sides of the top of the guide cylinder 1, and the snap locks 11 and the corresponding buckles 12 cooperate with each other;

[0052] It should be noted that: it is used to fix the top cover 7 and the guide cylinder 1, making it easier to install and disassemble the top cover 7 and the guide cylinder 1;

[0053] See also Figures 1 to 6 , holding rods 13 are provided on both sides of the inner rod 3 and the top of the guide cylinder 1;

[0054] It should be noted that: it is convenient for users to operate;

[0055] See also Figures 1 to 6 , a limiting ring 14 is equidistantly sleeved on the outer side of the inner rod 3, and the limiting ring 14 is slidably connected to the inside of the guide cylinder 1;

[0056] It should be noted that the limiting ring 14 is used to limit the sliding of the inner rod 3, so that the inner rod 3 can slide more smoothly;

[0057] See also Figures 1 to 6 A fixing seat 15 is provided on the top of the top cover 7, a latch 16 is slidably connected inside the fixing seat 15, positioning holes 17 are equidistantly provided on the surface of the inner rod 3, the latch 16 is slidably plugged into the corresponding positioning holes 17, a first spring 18 is sleeved on the outer side of the latch 16, and the latch 16 is elastically connected to the fixing seat 15 through the first spring 18;

[0058] It should be noted that: there are two positioning holes 17, one for controlling the opening state of the bending piece 6, and the other for controlling the closing state of the bending piece 6, and the state of the bending piece 6 is controlled by inserting the latch 16 into different positioning holes 17;

[0059] See also Figures 1 to 6 The connecting mechanism 5 includes a plug connector 19, a plug-in tube 20, a slide tube 21, a second spring 22 and a ball block 23. The top of the sampling tube 4 is fixedly connected with the plug-in tube 20, and the bottom end of the inner rod 3 is provided with a plug connector 19. An annular groove 24 is provided on the outer side of the plug connector 19. A slide tube 21 is slidably connected to the outer side of the plug-in tube 20. A second spring 22 is provided between the plug-in tube 20 and the slide tube 21. The slide tube 21 is elastically connected to the plug-in tube 20 through the second spring 22. The plug-in tube 20 is equidistantly connected with the ball block 23 in the circumferential direction, and the ball block 23 is connected to the inside and outside of the plug-in tube 20. One side of the ball block 23 is embedded in the annular groove 24, and the other side of the ball block 23 fits with the inner wall of the slide tube 21.

[0060] It should be noted that: when it is necessary to connect the sampling tube 4 and the inner rod 3, the plug connector 19 and the plug-in tube 20 begin to dock. During the docking process, the slide tube 21 is pressed down to allow the other side of the ball block 23 to have a certain amount of activity space, so that after the plug connector 19 is inserted into the plug-in tube 20, the ball block 23 will be affected by the plug connector 19 and slide to the other side. When the slide tube 21 rebounds and resets, the ball block 23 is embedded in the annular groove 24. Through this connection method, it is more convenient to connect the sampling tube 4 and the inner rod 3.

[0061] See also Figures 1 to 6 The top of the holding rod 13 on one side of the guide cylinder 1 is rotatably connected to a guide wheel 25, a traction rope 26 is wound around the outside of the guide wheel 25, one end of the traction rope 26 is fixedly connected to the latch 16, the bottom of the holding rod 13 on one side of the guide cylinder 1 is rotatably connected to an adjustment handle 27, one end of the adjustment handle 27 is fixedly connected to a tilting rod 28, and the bottom end of the traction rope 26 passes through the corresponding holding rod 13 and is fixedly connected to the tilting rod 28;

[0062] It should be noted that: by pressing the adjustment handle 27, the adjustment handle 27 drives the tilting rod 28 to move downward. Since the tilting rod 28 is fixedly connected to the bottom end of the traction rope 26, and the traction rope 26 passes around the guide wheel 25 and is fixedly connected to the latch 16, the downward movement of the tilting rod 28 will pull the traction rope 26, thereby driving the latch 16 to move toward the fixing seat 15 and be pulled out from the corresponding positioning hole 17, thereby unlocking the inner rod 3, thereby improving the convenience and safety of operation;

[0063] See also Figures 1 to 6 The embodiment of the present invention also provides an implementation method of a device for sampling different soil layers of plant soil, and the specific steps are as follows:

[0064] S1. Inserting into the soil: Align the cone head 2 with the soil position to be sampled, and use the pointed cone block 10 at the bottom of the cone head 2 to insert the device into the soil; gently rotate the guide cylinder 1, and use the conical frame of the cone head 2 and the hollow 9 design around it to make it easier to insert the device into the soil;

[0065] S2. Adjust the sampling depth: When the device reaches the depth of the soil layer to be sampled, lift the inner rod 3 by holding the rod 13 until the bent piece 6 is free from the constraint of the cone head 2 and resumes the petal-shaped expansion. At this time, the soil sample can freely enter the interior of the sampling tube 4;

[0066] S3, fix the inner rod 3: pull the latch 16 on the top cover 7 upwards, remove it from the positioning hole 17 of the control bending piece 6 in the closed state, and insert the latch 16 into another positioning hole 17 of the control bending piece 6 in the open state to fix the position of the inner rod 3 and ensure that the bottom of the sampling tube 4 is open;

[0067] S4, continue sampling: continue to press down the guide tube 1, so that the cone head 2 is further inserted into the soil, and the soil sample enters the sampling tube 4 through the hollow 9. If necessary, steps S2 and S3 can be repeated to collect soil samples from different soil layers;

[0068] S5, closing the sampling tube 4: when the predetermined sampling volume or depth is reached, the latch 16 is pulled again to be pulled out from the positioning hole 17 for controlling the opening state of the bending piece 6, and the inner rod 3 is pressed down to insert the latch 16 into the positioning hole 17 for controlling the closing state of the bending piece 6, so that the bending pieces 6 are bent and fitted to each other to form a closed hollow cone, thereby ensuring that the soil sample is completely collected inside the sampling tube 4;

[0069] S6. Take out the sample: pull out the guide tube 1, remove the top cover 7, take out the inner rod 3 and the sampling tube 4 from the guide tube 1, and carefully pour out the soil sample in the sampling tube 4 for subsequent analysis;

[0070] S7. Cleaning and maintenance: Clean the soil residue on each component of the device, especially the cone head 2 and the inside of the sampling tube 4. Check whether the device is damaged or worn. If necessary, replace or repair it in time. Store the device in a dry and ventilated place for next use.

[0071] The working principle of the plant soil different soil layer sampling device provided by the present invention is as follows:

[0072] First, the user aligns the cone head 2 of the guide tube 1 with the soil position where sampling is required. Through the pointed cone block 10 at the bottom of the cone head 2 and the conical frame design of the cone head 2, the device can be easily inserted into the soil until it reaches the depth of the soil layer required for sampling.

[0073] When the device reaches above the predetermined depth, the user operates the latch 16 in the fixing seat 15 on the top of the top cover 7 to pull it out from the positioning hole 17 on the surface of the inner rod 3. There are two positioning holes 17, one for controlling the opening state of the bending piece 6 and the other for controlling the closing state of the bending piece 6.

[0074] After pulling out the latch 16, the user pulls up the inner rod 3, and the bent piece 6 is freed from the constraint of the cone head 2 frame, and resumes the petal-shaped unfolding, and the bottom of the sampling tube 4 is open. This state allows the soil sample to freely enter the sampling tube 4;

[0075] After the soil sample enters the sampling tube 4, the user reinserts the latch 16 into the positioning hole 17 that controls the opening state of the bending piece 6, and fixes the inner rod 3 that slides up to a certain height;

[0076] Next, the user continues to press the guide tube 1 to further insert the cone head 2 into the soil. At this time, the soil can enter the sampling tube 4 which is already in the open state through the hollow 9 around the cone head 2.

[0077] When the predetermined sampling volume or depth is reached, the user operates the latch 16 again, pulls it out of the positioning hole 17 that controls the opening state of the bending piece 6, presses down the inner rod 3, and then inserts the latch 16 into another positioning hole 17 that controls the closing state of the bending piece 6. The bending piece 6 is squeezed by the skeleton of the cone head 2, and bends and fits each other to form a closed hollow cone. This structure can ensure that the soil sample is completely collected inside the sampling tube 4 during the sampling process to avoid sample leakage;

[0078] After the sampling is completed, the user pulls out the guide tube 1, removes the top cover 7, and then takes out the inner rod 3 and the sampling tube 4 from the guide tube 1. At this time, the sampling tube 4 contains the soil sample of the required soil layer for subsequent analysis.

[0079] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for sampling different soil layers of plant soil, characterized in that: include: Guide tube (1): The guide tube (1) is in the shape of a hollow long tube and is used for inserting into the soil for guidance; A cone head (2), the bottom of the guide cylinder (1) is fixedly connected with the cone head (2); An inner rod (3), wherein the inner rod (3) is arranged inside the guide cylinder (1); A sampling tube (4), the bottom end of the inner rod (3) is connected to the sampling tube (4) through a connecting mechanism (5), and is used to collect soil samples. Bend pieces (6) are equidistantly provided at the bottom of the sampling tube (4); Bending pieces (6), the bottom of the sampling tube (4) is equidistantly provided with bending pieces (6), the bending pieces (6) are unfolded in a petal shape in an initial state, and the bending pieces (6) are located inside the cone head (2), when the inner rod (3) is pressed down, the bending pieces (6) are affected by the skeleton of the cone head (2), and are bent and fitted to each other to form a closed hollow cone; A top cover (7), the top of the guide cylinder (1) is provided with a top cover (7), one side of the top cover (7) is provided with a groove (8), and the inner rod (3) is slidably connected inside the groove (8); The cone head (2) is provided with a conical frame, and the cone head (2) is connected to the bottom of the guide tube (1) through a thread, and a hollow portion (9) is provided on the outer side of the cone head (2); A holding rod (13) is provided on both sides of the top of the inner rod (3) and the guide cylinder (1), a fixing seat (15) is provided on the top of the top cover (7), a latch (16) is slidably connected inside the fixing seat (15), positioning holes (17) are equidistantly provided on the surface of the inner rod (3), the latch (16) is slidably plugged into the corresponding positioning holes (17), a first spring (18) is sleeved on the outer side of the latch (16), the latch (16) is elastically connected to the fixing seat (15) through the first spring (18), and the guide cylinder (17) is provided with a first spring (18). A guide wheel (25) is rotatably connected to the top of a holding rod (13) on one side of the guide cylinder (1), a traction rope (26) is wound around the outer side of the guide wheel (25), one end of the traction rope (26) is fixedly connected to the latch (16), an adjustment handle (27) is rotatably connected to the bottom of the holding rod (13) on one side of the guide cylinder (1), one end of the adjustment handle (27) is fixedly connected to a tilting rod (28), and the bottom end of the traction rope (26) passes through the corresponding holding rod (13) and is fixedly connected to the tilting rod (28).

2. The device for sampling different soil layers of plant soil according to claim 1, characterized in that: A pointed cone block (10) is provided at the bottom of the cone head (2).

3. The device for sampling different soil layers of plant soil according to claim 1, characterized in that: The top cover (7) is provided with snap locks (11) on both sides, and the top of the guide tube (1) is provided with buckles (12) on both sides, and the snap locks (11) and the corresponding buckles (12) cooperate with each other.

4. The device for sampling different soil layers of plant soil according to claim 1, characterized in that: The outer side of the inner rod (3) is equidistantly sleeved with a limiting ring (14), and the limiting ring (14) is slidably connected to the inside of the guide cylinder (1).

5. The device for sampling different soil layers of plant soil according to claim 1, characterized in that: The connecting mechanism (5) comprises a plug connector (19), a plug-in tube (20), a slide tube (21), a second spring (22) and a ball block (23); the top of the sampling tube (4) is fixedly connected with the plug-in tube (20); the bottom of the inner rod (3) is provided with a plug connector (19); an annular groove (24) is provided on the outer side of the plug connector (19); a slide tube (21) is slidably connected to the outer side of the plug-in tube (20); a second spring (22) is provided between the plug-in tube (20) and the slide tube (21); the slide tube (21) is elastically connected to the plug-in tube (20) through the second spring (22); the plug-in tube (20) is equidistantly connected with the ball block (23) in the circumferential direction; the ball block (23) is connected to the plug-in tube (20) inside and outside; one side of the ball block (23) is embedded in the annular groove (24); the other side of the ball block (23) is in contact with the inner wall of the slide tube (21).

6. The implementation method of the device for sampling different soil layers of plant soil according to any one of claims 1 to 5, characterized in that: The specific steps are as follows: S1. Inserting into the soil: Align the cone head (2) with the soil position to be sampled, and use the pointed cone block (10) at the bottom of the cone head (2) to insert the device into the soil; gently rotate the guide tube (1), and use the conical frame of the cone head (2) and the hollow (9) design around it to make it easier to insert the device into the soil; S2. Adjust the sampling depth: When the device reaches the depth of the soil layer to be sampled, the inner rod (3) is lifted by the holding rod (13) until the bending piece (6) is freed from the constraint of the cone head (2) and resumes the petal-like expansion. At this time, the soil sample can freely enter the interior of the sampling tube (4); S3, fix the inner rod (3): pull the latch (16) on the top cover (7) upwards to remove it from the positioning hole (17) of the control bending piece (6) in the closed state, and insert the latch (16) into another positioning hole (17) of the control bending piece (6) in the open state to fix the position of the inner rod (3) and ensure that the bottom of the sampling tube (4) is open; S4, continue sampling: continue to press down the guide tube (1) to make the cone head (2) further inserted into the soil, and the soil sample enters the sampling tube (4) through the hollow (9). If necessary, steps S2 and S3 can be repeated to collect soil samples from different soil layers; S5. Close the sampling tube (4): When the predetermined sampling volume or depth is reached, the latch (16) is pulled again to be removed from the positioning hole (17) for controlling the opening state of the bending piece (6), and the inner rod (3) is pressed downward to insert the latch (16) into the positioning hole (17) for controlling the closing state of the bending piece (6), so that the bending pieces (6) are bent and fitted to each other to form a closed hollow cone, thereby ensuring that the soil sample is completely collected inside the sampling tube (4); S6. Take out the sample: pull out the guide tube (1), remove the top cover (7), take out the inner rod (3) and the sampling tube (4) from the guide tube (1), and carefully pour out the soil sample in the sampling tube (4) for subsequent analysis; S7. Cleaning and maintenance: Clean the soil residue on each part of the device, especially the cone head (2) and the inside of the sampling tube (4). Check whether the device is damaged or worn. If necessary, replace or repair it in time. Store the device in a dry and ventilated place for next use.

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