A soil sampling device for forestry surveying and mapping

Abstract

The present invention discloses a soil sampling device for forestry surveying and mapping, which relates to the technical field of soil sampling, and comprises an outer cylinder and an inner rod, wherein the outer side of the inner rod is provided with a tunnel inner wall protection mechanism, and the tunnel inner wall protection mechanism comprises a mounting sleeve, which is fixedly connected to the outer side wall of the inner rod, and the outer side wall of the mounting sleeve is fixedly connected with an adjustment frame at an equal distance, and the inner walls on both sides of each adjustment frame are fixedly connected with an adjustment slide rail. The present invention discloses a soil sampling device for forestry surveying and mapping, which has the effect that in the process of introducing the sampling device into the tunnel through an external lifting mechanism, the intermittently adjustable hydraulic cylinder drives the inner pressure arc plate to squeeze toward the inner side wall of the tunnel to complete the initial squeezing and reinforcement, and in the process of squeezing, each raised pressure rod is gradually pressed into the inner side wall of the tunnel, thereby performing secondary squeezing and reinforcement on the soil on the inner side wall of the tunnel, so that the soil density on the inner side wall of the tunnel is gradually increased, and the risk of its collapse is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, and in particular to a soil sampling device for forestry surveying and mapping. Background Art

[0002] In forestry surveying, in order to ensure that trees can grow effectively, it is necessary to conduct geological exploration before planting them. Therefore, it is necessary to sample the soil at each layer through a soil sampling device.

[0003] During the use of the existing soil sampling device for forestry surveying, after the soil is drilled, the tunnel inside is in a state of easy collapse. When the sampling device is placed inside the tunnel, if the soil collapses, the sampling device is easily retained inside the tunnel, and the sampling operation cannot be completed, which increases the cost investment and reduces the use value of the soil sampling device. Summary of the invention

[0004] The invention discloses a soil sampling device for forestry surveying and mapping, aiming to solve the technical problem that in the use of the existing soil sampling device for forestry surveying and mapping, after the soil is drilled, the tunnel inside the device is in a state of easy collapse, and when the sampling device is placed inside the tunnel, if the soil collapses, the sampling device is easily retained inside the tunnel, and the sampling operation cannot be completed, which increases the cost investment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A soil sampling device for forestry surveying and mapping comprises an outer cylinder and an inner rod, wherein a tunnel inner wall protection mechanism is provided on the outer side of the inner rod, and the tunnel inner wall protection mechanism comprises a mounting sleeve, which is fixedly connected to the outer wall of the inner rod, and an adjustment frame is fixedly connected to the outer wall of the mounting sleeve at equal distances, and both inner walls of each adjustment frame are fixedly connected to adjustment slide rails, and two adjustment slide rails located inside the same adjustment frame are slidably connected to the same sliding frame, one side of the sliding frame is fixedly connected to an inner pressure arc plate, and raised pressure rods are fixedly connected to the arc surface of the inner pressure arc plate at equal distances, and a hydraulic cylinder three is fixedly connected to the inner wall of one side of the adjustment frame, and the output end of the hydraulic cylinder three is fixedly connected to one side of the sliding frame.

[0007] By providing a protection mechanism for the inner wall of the tunnel, in the process of introducing the sampling device into the interior of the tunnel through an external lifting mechanism, the intermittently adjustable hydraulic cylinder three drives the inner pressure arc plate to squeeze toward the inner wall of the tunnel to complete the initial extrusion reinforcement. During the extrusion process, each raised pressure rod is gradually pressed into the inner wall of the tunnel, thereby performing secondary extrusion reinforcement on the soil on the inner wall of the tunnel, so that the density of the soil on the inner wall of the tunnel is gradually increased, reducing the risk of its collapse. At the same time, when the inner rod moves to the first specified height, the adjustable hydraulic cylinder two drives the upper and lower pressure arc plates to squeeze the partition airbag, so that the gas inside the partition airbag flows toward the inner wall of the tunnel, thereby realizing the upper and lower partition of the tunnel through the deformed partition airbag, preventing the soil in the space above the tunnel from falling off and falling below, ensuring that the soil collected below is the soil at the current depth, thereby improving the accuracy of soil sampling.

[0008] In a preferred embodiment, two docking rods are fixedly connected to the bottom of the mounting sleeve, and the bottoms of the two docking rods are fixedly connected to the same mounting ring rod, the outer wall of the mounting ring rod is fixedly connected to a partition airbag, an air hole is opened on the outer wall of the partition airbag facing downward, an air pipe is fixedly connected to the inside of the air hole, and the outer wall of the air pipe is connected to an air valve through a flange.

[0009] In a preferred solution, the top and bottom of the mounting ring rod are fixedly connected with connecting rods at equal distances, and the end of each connecting rod is fixedly connected with a hydraulic cylinder 2, and multiple hydraulic cylinders 2 located on the same surface drive the output end to be fixedly connected with the same pressing arc piece.

[0010] In a preferred embodiment, a multi-level sampling mechanism is provided at the bottom end of the inner rod, and the multi-level sampling mechanism includes a sampling frame, and two mounting blocks are fixedly connected to the arc surface of the sampling frame, and the two mounting blocks are fixedly connected to the outer wall of the inner rod.

[0011] By setting a multi-level sampling mechanism, after the sampling frame is moved to the specified depth, the driving motor 1 is started, and the driving motor 1 drives the rotating shaft to rotate 45°, so that the shielding piece is away from the diversion frame, and the hydraulic cylinder 4 is adjusted to drive the sampling rotating teeth on the extension frame to contact the soil on the inner wall of the tunnel, and the driving motor 2 is started, and the driving motor 2 drives the sampling rotating teeth to scrape the soil in the tunnel, and the scraped soil then passes through the diversion frame and falls between the two sampling partitions. After a single sampling is completed, the driving motor 1 is started again to drive the rotating shaft to rotate 45°, so as to move the shielding piece to the diversion frame, and the diversion frame is shielded by the shielding piece to prevent soil from other layers from entering between the sampling partitions during the depth adjustment process of the sampling frame, thereby preventing the sampled soil from being contaminated.

[0012] In a preferred embodiment, a driving motor 1 is fixedly connected to one side of the sampling frame, and the output shaft of the driving motor 1 is fixedly connected to a rotating shaft via a coupling, one end of the rotating shaft is connected to an inner wall of one side of the sampling frame via a bearing, and eight sampling partitions are fixedly connected to the outer wall of the rotating shaft, and the sampling partitions are fitted to the inner wall of the sampling frame, and four shielding plates are distributed at intervals on the outer walls of the multiple sampling partitions, and the shielding plates are fitted to the inner wall of the sampling frame.

[0013] In a preferred embodiment, a material guide hole is opened on the outer wall near the top of the sampling frame, and a flow guide frame is fixedly connected to the inside of the material guide hole, a supporting bottom block is fixedly connected to the downward inclined surface of the flow guide frame, a hydraulic cylinder four is fixedly connected to one side of the supporting bottom block, and an extension frame is fixedly connected to the output end of the hydraulic cylinder four, and the extension frame is sleeved on the outer wall of the flow guide frame.

[0014] In a preferred solution, both sides of the extension frame are fixedly connected with shaft plates, and one side of one of the shaft plates is fixedly connected with drive motor 2, the output shaft of drive motor 2 is fixedly connected with the drive shaft through a coupling, one end of the drive shaft is connected to one side of the other shaft plate through a bearing, the outer wall of the drive shaft is fixedly connected with a sampling gear, a discharge hole is opened on the downwardly facing arc surface of the sampling frame, the inside of the discharge hole is fixedly connected with a discharge frame, and a sealing cover is inserted on the discharge frame.

[0015] In a preferred embodiment, the outer wall of the outer cylinder near the top is fixedly connected to a ground frame, and the top of the ground frame is fixedly connected to two connecting frames, and the two connecting frames are fixedly connected to hydraulic cylinder 1 on one side facing the ground frame, and the output ends of the two hydraulic cylinders 1 are fixedly connected to the same lifting ring plate.

[0016] By providing an outer cylinder, an inner rod and a graduated rod, when the outer cylinder drops to the limit, the hydraulic cylinder is adjusted to drive the inner rod to continue to drop, thereby extending the sampling depth. During the process of the inner rod dropping, the depth of the inner rod dropping is monitored in real time through the graduated rod, thereby ensuring the accuracy of the sampling depth. After the sampling is completed, when the hydraulic cylinder is reset, the inner rod is reset accordingly. During the use of the sampling device, if the hydraulic cylinder is damaged, the lifting ring plate can be squeezed by manual pressing. After the sampling is completed, the stretching spring rod can drive the inner rod to gradually reset, thereby improving the emergency function of the device during use.

[0017] In a preferred solution, a fixing hole is opened on the lifting ring plate, and a scale rod is fixedly connected to the inside of the fixing hole, and the inner rod is fixedly connected to the bottom of the scale rod.

[0018] In a preferred solution, lifting grooves are formed at equal intervals on the inner wall of the outer cylinder, and lifting slide bars are fixedly connected at equal intervals to the outer wall of the inner rod, the lifting slide bars are slidably connected to the inside of the corresponding lifting grooves, the inner wall of the outer cylinder located above the lifting grooves is fixedly connected to an inner fixed sleeve, the lifting slide bars are slidably connected to the inside of the lifting slide bars at equal intervals, the same tension spring rod is fixedly connected between every two adjacent lifting slide bars, the uppermost tension spring rod is fixedly connected to the inside of the inner fixed sleeve, and the lowermost lifting slide bar is fixedly connected to the top of the inner rod.

[0019] As can be seen from the above, the soil sampling device for forestry surveying and mapping provided by the present invention has the feature that in the process of introducing the sampling device into the interior of the tunnel through an external lifting mechanism, the intermittently adjustable hydraulic cylinder three drives the inner pressure arc plate to squeeze toward the inner wall of the tunnel to complete the initial extrusion and reinforcement. During the extrusion process, each raised pressure rod is gradually pressed into the inner wall of the tunnel, thereby performing secondary extrusion and reinforcement on the soil on the inner wall of the tunnel, so that the soil density on the inner wall of the tunnel is gradually increased, reducing the risk of its collapse. At the same time, when the inner rod moves to the first specified height, the adjustable hydraulic cylinder two drives the upper and lower pressure arc plates to squeeze the partition airbag, so that the gas inside the partition airbag flows toward the inner wall of the tunnel, thereby realizing the upper and lower partition of the tunnel through the deformed partition airbag, preventing the soil in the space above the tunnel from falling off and falling below, ensuring that the soil collected below is the soil at the current depth, thereby improving the accuracy of soil sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a schematic diagram of the overall structure of a soil sampling device for forestry surveying and mapping proposed by the present invention.

[0021] Figure 2 This is a schematic diagram of the inner side wall protection mechanism of a tunnel of a soil sampling device for forestry surveying and mapping proposed by the present invention.

[0022] Figure 3 for Figure 2 The overall structural cross-sectional view.

[0023] Figure 4 for Figure 3 Schematic diagram of the plan structure.

[0024] Figure 5 This is a schematic diagram of a multi-level sampling mechanism of a soil sampling device for forestry surveying and mapping proposed by the present invention.

[0025] Figure 6 The present invention provides a cross-sectional view of the sampling frame structure of a soil sampling device for forestry surveying and mapping.

[0026] Figure 7The present invention is a schematic diagram of the combined structure of a guide frame and sampling rotating teeth of a soil sampling device for forestry surveying and mapping proposed by the present invention.

[0027] Figure 8 This is a disassembled diagram of the outer cylinder and inner rod structure of a soil sampling device for forestry surveying and mapping proposed by the present invention.

[0028] In the figure: 1, outer cylinder; 2, hydraulic cylinder 1; 3, scale rod; 4, connecting frame; 5, grounding frame; 6, tunnel inner wall protection mechanism; 601, inner pressure arc plate; 602, raised pressure rod; 603, partition airbag; 604, pressing arc sheet; 605, installation sleeve; 606, air pipe; 607, hydraulic cylinder 2; 608, connecting rod; 609, installation ring rod; 610, docking rod; 611, hydraulic cylinder 3; 612, adjustment frame; 613, sliding frame; 614, adjustment slide rail; 7, multi-level sampling mechanism; 701, sampling Frame; 702, drive motor one; 703, discharge frame; 704, guide frame; 705, sampling gear; 706, extension frame; 707, cover; 708, mounting block; 709, shielding piece; 710, sampling partition; 711, rotating shaft; 712, shaft plate; 713, drive shaft; 714, drive motor two; 715, hydraulic cylinder four; 716, support bottom block; 8, lifting ring plate; 9, inner fixed sleeve; 10, lifting slide block; 11, stretching spring rod; 12, lifting slide rod; 13, inner rod; 14, lifting slide groove. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] The soil sampling device for forestry surveying and mapping disclosed in the present invention is mainly applied to the existing soil sampling device for forestry surveying and mapping. During use, after the soil is drilled, the tunnel inside is in a state of easy collapse. When the sampling device is placed inside the tunnel, if soil collapse occurs, the sampling device is easily retained inside the tunnel, and the sampling operation cannot be completed, which increases the cost investment.

[0031] Reference Figure 1-Figure 8A soil sampling device for forestry surveying and mapping comprises an outer cylinder 1 and an inner rod 13, a tunnel inner wall protection mechanism 6 is arranged on the outer side of the inner rod 13, and the tunnel inner wall protection mechanism 6 comprises a mounting sleeve 605, the mounting sleeve 605 is fixedly connected to the outer wall of the inner rod 13, an adjusting frame 612 is fixedly connected to the outer wall of the mounting sleeve 605 at equal distances, and both inner walls of each adjusting frame 612 are fixedly connected to adjusting slide rails 614, and the same sliding connecting frame 613 is slidably connected to the two adjusting slide rails 614 located inside the same adjusting frame 612, one side of the sliding connecting frame 613 is fixedly connected to an inner pressure arc plate 601, and a raised pressure rod 602 is fixedly connected to the arc surface of the inner pressure arc plate 601 at equal distances, a hydraulic cylinder three 611 is fixedly connected to the inner wall of one side of the adjusting frame 612, and the output end of the hydraulic cylinder three 611 is fixedly connected to one side of the sliding connecting frame 613.

[0032] In a specific application scenario, in the process of introducing the sampling device into the interior of the tunnel through an external lifting mechanism, the intermittently adjustable hydraulic cylinder three 611 drives the inner pressure arc plate 601 to squeeze toward the inner wall of the tunnel to complete the initial extrusion reinforcement. During the extrusion process, each raised pressure rod 602 is gradually pressed into the inner wall of the tunnel, thereby performing secondary extrusion reinforcement on the soil on the inner wall of the tunnel, so that the soil density on the inner wall of the tunnel is gradually increased, reducing the risk of its collapse.

[0033] Specifically, when the inner rod 13 moves to the first specified height, the hydraulic cylinder 2 607 is adjusted to drive the pressing arc pieces 604 at the upper and lower ends to squeeze the partition airbag 603, so that the gas inside the partition airbag 603 flows toward the inner wall of the tunnel, thereby realizing the upper and lower partition of the tunnel through the deformed partition airbag 603, preventing the soil in the space above the tunnel from falling off and falling below, ensuring that the soil collected below is the soil at the current depth, thereby improving the accuracy of soil sampling.

[0034] Reference Figure 1-Figure 4 In a preferred embodiment, two docking rods 610 are fixedly connected to the bottom of the mounting sleeve 605, and the bottoms of the two docking rods 610 are fixedly connected to the same mounting ring rod 609, the outer wall of the mounting ring rod 609 is fixedly connected to the partition airbag 603, and the outer wall of the partition airbag 603 facing downward is provided with an air hole, the inside of the air hole is fixedly connected to an air pipe 606, and the outer wall of the air pipe 606 is connected to an air valve through a flange, and the top and bottom of the mounting ring rod 609 are fixedly connected to connecting rods 608 at equal distances, and the ends of each connecting rod 608 are fixedly connected to a hydraulic cylinder 2 607, and multiple hydraulic cylinders 2 607 located on the same surface drive the output end to be fixedly connected to the same pressing arc piece 604.

[0035] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7In a preferred embodiment, a multi-level sampling mechanism 7 is provided at the bottom end of the inner rod 13, and the multi-level sampling mechanism 7 includes a sampling frame 701, two mounting blocks 708 are fixedly connected to the arc surface of the sampling frame 701, and the two mounting blocks 708 are fixedly connected to the outer wall of the inner rod 13, one side of the sampling frame 701 is fixedly connected to a driving motor 1 702, and the output shaft of the driving motor 1 702 is fixedly connected to a rotating shaft 711 through a coupling, one end of the rotating shaft 711 is connected to an inner wall of one side of the sampling frame 701 through a bearing, and eight sampling partitions 710 are fixedly connected to the outer wall of the rotating shaft 711, and the sampling partitions 710 are in contact with the inner wall of the sampling frame 701, and four shielding sheets 709 are distributed at intervals on the outer walls of the plurality of sampling partitions 710, and the shielding sheets 709 are in contact with the inner wall of the sampling frame 701, and a material guide hole is opened on the outer wall of the sampling frame 701 near the top, and A guide frame 704 is fixedly connected to the inside of the guide hole, a support bottom block 716 is fixedly connected to the downward inclined surface of the guide frame 704, a hydraulic cylinder 715 is fixedly connected to one side of the support bottom block 716, an extension frame 706 is fixedly connected to the output end of the hydraulic cylinder 715, the extension frame 706 is sleeved on the outer wall of the guide frame 704, both sides of the extension frame 706 are fixedly connected to shaft plates 712, and one side of one of the shaft plates 712 is fixedly connected to a drive motor 714, the output shaft of the drive motor 714 is fixedly connected to a drive shaft 713 through a coupling, one end of the drive shaft 713 is connected to one side of the other shaft plate 712 through a bearing, a sampling gear 705 is fixedly connected to the outer wall of the drive shaft 713, a discharge hole is opened on the downward curved surface of the sampling frame 701, a discharge frame 703 is fixedly connected to the inside of the discharge hole, and a cover 707 is inserted into the discharge frame 703.

[0036] Specifically, after the sampling frame 701 is moved to the specified depth, the driving motor 1 702 is started, and the driving motor 1 702 drives the rotating shaft 711 to rotate 45°, so that the shielding piece 709 is away from the guide frame 704, and the hydraulic cylinder 4 715 is adjusted to drive the sampling rotating teeth 705 on the extension frame 706 to contact the soil on the inner wall of the tunnel, and the driving motor 2 714 is started, and the driving motor 2 714 drives the sampling rotating teeth 705 to scrape the soil in the tunnel, and the scraped soil then passes through the guide frame 704 and falls between the two sampling partitions 710. After a single sampling is completed, the driving motor 1 702 is started again to drive the rotating shaft 711 to rotate 45°, so that the shielding piece 709 is moved to the guide frame 704, and the guide frame 704 is shielded by the shielding piece 709, so as to prevent soil from other layers from entering between the sampling partitions 710 during the depth adjustment process of the sampling frame 701, thereby preventing the sampled soil from being contaminated.

[0037] It should be noted that eight sampling partitions 710 and four shielding plates 709 are installed inside the sampling frame 701. The driving motor 702 drives the rotating shaft 711 to rotate 90° every time to complete soil sampling at one depth. If the driving motor 702 drives the rotating shaft 711 to rotate 360°, four groups of sampling are completed. After the sampling is completed, the sampling device is lifted out of the tunnel, and the staff removes the cover 707. The sampling partition 710 is driven by the driving motor 702 to rotate, so that four portions of sampled soil can be taken out, which is convenient and efficient.

[0038] Reference Figure 1 and Figure 8 In a preferred embodiment, the outer wall of the outer cylinder 1 near the top is fixedly connected to a ground frame 5, and the top of the ground frame 5 is fixedly connected to two connecting frames 4, and the two connecting frames 4 are fixedly connected to the hydraulic cylinder 1 2 on one side facing the ground frame 5, and the output ends of the two hydraulic cylinders 1 2 are fixedly connected to the same lifting ring plate 8, and the lifting ring plate 8 is provided with a fixing hole, and the inside of the fixing hole is fixedly connected to the scale rod 3, and the inner rod 13 is fixedly connected to the bottom of the scale rod 3, and the inner wall of the outer cylinder 1 is provided with lifting grooves 14 at equal distances, and the outer wall of the inner rod 13 The lifting slide rods 12 are fixedly connected at equal distances, and the lifting slide rods 12 are slidably connected to the inside of the corresponding lifting slide grooves 14. The inner side wall of the outer cylinder 1 located above the lifting slide grooves 14 is fixedly connected to the inner fixed sleeve 9. The lifting slide grooves 14 are located above the lifting slide rods 12 and are slidably connected to the lifting sliders 10 at equal distances. The same tension spring rod 11 is fixedly connected between every two adjacent lifting sliders 10. The uppermost tension spring rod 11 is fixedly connected to the inside of the inner fixed sleeve 9, and the lowermost lifting slider 10 is fixedly connected to the top of the inner rod 13.

[0039] Working principle: When in use, the sampling device is introduced into the tunnel through the external lifting mechanism. During the descent of the outer tube 1, the intermittently adjusted hydraulic cylinder three 611 drives the inner pressure arc plate 601 to squeeze toward the inner wall of the tunnel to complete the initial extrusion and reinforcement. During the extrusion, each raised pressure rod 602 is gradually pressed into the inner wall of the tunnel, thereby performing secondary extrusion and reinforcement on the soil on the inner wall of the tunnel. When the inner rod 13 moves to the first specified height, the hydraulic cylinder two 607 is adjusted to drive the upper and lower pressing arc plates 604 to squeeze the partition airbag 603, so that the gas inside the partition airbag 603 flows toward the inner wall of the tunnel, thereby realizing the upper and lower partition of the tunnel through the deformed partition airbag 603, and starting the drive motor one 702. The drive motor one 702 drives the rotating shaft 711 to rotate 45°, so that the shielding plate 709 is away from the guide frame 704, and the hydraulic cylinder four 715 is adjusted to drive the sampling rotating gear on the extension frame 706 705 contacts the soil on the inner wall of the tunnel, and the driving motor 2 714 is started. The driving motor 2 714 drives the sampling gear 705 to scrape the soil in the tunnel, and the scraped soil then passes through the guide frame 704 and falls between the two sampling partitions 710. After a single sampling is completed, the driving motor 1 702 is started again to drive the rotating shaft 711 to rotate 45°, so that the shielding piece 709 is moved to the guide frame 704, and the guide frame 704 is shielded by the shielding piece 709. The driving motor 1 702 drives the rotating shaft 711 to rotate 90° to complete the soil sampling at one depth. If the driving motor 1 702 drives the rotating shaft 711 to rotate 360°, four groups of sampling are completed. After the sampling is completed, the sampling device is lifted out of the tunnel, and the staff removes the cover 707. The sampling partition 710 is driven by the driving motor 1 702 to rotate, so that four portions of sampled soil can be taken out, and the operation is completed.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A soil sampling device for forestry surveying and mapping, comprising an outer cylinder (1) and an inner rod (13), characterized in that: A tunnel inner wall protection mechanism (6) is provided on the outer side of the inner rod (13), and the tunnel inner wall protection mechanism (6) comprises a mounting sleeve (605), the mounting sleeve (605) is fixedly connected to the outer wall of the inner rod (13), the outer wall of the mounting sleeve (605) is fixedly connected to an adjustment frame (612) at an equal distance, and the inner walls on both sides of each adjustment frame (612) are fixedly connected to adjustment slide rails (614), and the same sliding connecting frame (613) is slidably connected to two adjustment slide rails (614) located inside the same adjustment frame (612), one side of the sliding connecting frame (613) is fixedly connected to an inner pressure arc plate (601), and a raised pressure rod (602) is fixedly connected to the arc surface of the inner pressure arc plate (601) at an equal distance, and the inner wall of one side of the adjustment frame (612) is fixedly connected to a hydraulic cylinder three (611), and the output end of the hydraulic cylinder three (611) is fixedly connected to one side of the sliding connecting frame (613); The bottom of the mounting sleeve (605) is fixedly connected to two docking rods (610), and the bottoms of the two docking rods (610) are fixedly connected to a same mounting ring rod (609), the outer wall of the mounting ring rod (609) is fixedly connected to a partition airbag (603), the outer wall of the partition airbag (603) facing downward is provided with an air hole, the inside of the air hole is fixedly connected to an air pipe (606), and the outer wall of the air pipe (606) is connected to an air valve via a flange; The top and bottom of the mounting ring rod (609) are fixedly connected to connecting rods (608) at equal distances, and the end of each connecting rod (608) is fixedly connected to a hydraulic cylinder 2 (607), and the output ends of the plurality of hydraulic cylinders 2 (607) located on the same surface are fixedly connected to the same pressing arc piece (604); A multi-layer sampling mechanism (7) is provided at the bottom end of the inner rod (13), and the multi-layer sampling mechanism (7) comprises a sampling frame (701), and two mounting blocks (708) are fixedly connected to the upper arc surface of the sampling frame (701), and the two mounting blocks (708) are both fixedly connected to the outer side wall of the inner rod (13).

2. A soil sampling device for forestry surveying and mapping according to claim 1, characterized in that: One side of the sampling frame (701) is fixedly connected to a driving motor 1 (702), and the output shaft of the driving motor 1 (702) is fixedly connected to a rotating shaft (711) via a coupling; one end of the rotating shaft (711) is connected to an inner wall of one side of the sampling frame (701) via a bearing; eight sampling partitions (710) are fixedly connected to an outer wall of the rotating shaft (711); the sampling partitions (710) are fitted to the inner wall of the sampling frame (701); four shielding sheets (709) are distributed at intervals on the outer walls of the plurality of sampling partitions (710); the shielding sheets (709) are fitted to the inner wall of the sampling frame (701).

3. A soil sampling device for forestry surveying and mapping according to claim 2, characterized in that: The sampling frame (701) is provided with a material guide hole on the outer side wall near the top, and a flow guide frame (704) is fixedly connected inside the material guide hole, a support bottom block (716) is fixedly connected to the downward inclined surface of the flow guide frame (704), a hydraulic cylinder four (715) is fixedly connected to one side of the support bottom block (716), and an extension frame (706) is fixedly connected to the output end of the hydraulic cylinder four (715), and the extension frame (706) is sleeved on the outer side wall of the flow guide frame (704).

4. A soil sampling device for forestry surveying and mapping according to claim 3, characterized in that: Both sides of the extension frame (706) are fixedly connected with shaft plates (712), and one side of one of the shaft plates (712) is fixedly connected with a second drive motor (714), the output shaft of the second drive motor (714) is fixedly connected with a drive shaft (713) via a coupling, one end of the drive shaft (713) is connected to one side of the other shaft plate (712) via a bearing, the outer wall of the drive shaft (713) is fixedly connected with a sampling gear (705), a discharge hole is opened on the downwardly facing arc surface of the sampling frame (701), the inside of the discharge hole is fixedly connected with a discharge frame (703), and a cover (707) is plugged into the discharge frame (703).

5. A soil sampling device for forestry surveying and mapping according to any one of claims 1 to 4, characterized in that: The outer wall of the outer cylinder (1) close to the top is fixedly connected to a ground frame (5), and the top of the ground frame (5) is fixedly connected to two connecting frames (4), and the two connecting frames (4) are fixedly connected to hydraulic cylinders (2) on one side facing the ground frame (5), and the output ends of the two hydraulic cylinders (2) are fixedly connected to the same lifting ring plate (8).

6. A soil sampling device for forestry surveying and mapping according to claim 5, characterized in that: The lifting ring plate (8) is provided with a fixing hole, and a scale rod (3) is fixedly connected inside the fixing hole, and the inner rod (13) is fixedly connected to the bottom of the scale rod (3).

7. A soil sampling device for forestry surveying and mapping according to claim 6, characterized in that: The inner wall of the outer cylinder (1) is provided with lifting grooves (14) at equal intervals, and the outer wall of the inner rod (13) is fixedly connected with lifting slide bars (12) at equal intervals, the lifting slide bars (12) are slidably connected to the inside of the corresponding lifting grooves (14), the inner wall of the outer cylinder (1) located above the lifting grooves (14) is fixedly connected with an inner fixed sleeve (9), the lifting grooves (14) are located above the lifting slide bars (12) and are slidably connected with lifting sliders (10) at equal intervals, and the same tension spring rod (11) is fixedly connected between each two adjacent lifting sliders (10), the uppermost tension spring rod (11) is fixedly connected to the inside of the inner fixed sleeve (9), and the lowermost lifting slider (10) is fixedly connected to the top of the inner rod (13).

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