A soil sampling device for detecting organic carbon in forest soil

Abstract

The present invention relates to the field of soil sampling technology, and discloses a soil sampling device for detecting organic carbon in forest soil, including a sampling tube and a barrier assembly placed at the bottom of the sampling tube, the barrier assembly including: a plurality of barrier plates, a plurality of collars, and a plurality of hinge supports, the plurality of barrier plates are all fan-shaped, each barrier plate is placed in the sampling tube, the bottom of the groove of the sampling tube at each through-hole is vertically provided with a through-slit matching the thickness of the barrier plate, a plurality of collars are respectively rotatably sleeved on the ends of each rotating shaft away from the barrier plate, and the plate surface of the barrier plate is turned over under the action of external force, the collar and the hinge support are hinged through a horizontally arranged first hinge shaft, and the barrier plate with the plate surface in a horizontal state can be rotated through the through-slit under the action of external force. The device can realize that after the sampling tube is filled with soil samples, the soil at the bottom of the sampling tube and the soil in a connected state of the stratum are cut off, and the bottom of the sampling tube is just sealed after cutting.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, and in particular to a soil sampling device for detecting organic carbon in forest soil. Background Art

[0002] Soil microorganisms, as "carbon pumps", play an important regulatory role in the soil organic carbon sequestration process. In recent years, the mechanism of stable soil organic carbon sequestration has received widespread attention, especially the research on how to reduce CO2 emissions and increase soil carbon sequestration capacity through reasonable land use methods. In the context of global environmental change, understanding the variation in soil microbial water use and carbon use efficiency and its influencing mechanism is of great significance for better understanding the response of ecosystem water-carbon interactions and their coupled cycle processes to global change.

[0003] The accuracy of organic carbon detection in forest soil depends on whether the sampled soil is representative and complete, so soil sampling is particularly important. Currently, testers will determine representative sampling sites based on environmental factors such as terrain and vegetation distribution. After the sampling points are determined, soil sampling devices will be used to achieve hierarchical sampling of soil at different depths at the sampling points. In order to consider efficiency, soil sampling is mostly done by mechanical sampling. The soil sampling device includes a hollow drill pipe with an external thread on the outer surface and a sampling tube arranged in the drill pipe for storing soil samples. The upper end of the drill pipe is usually provided with a drive assembly that drives it to rotate and feed vertically. Before use, the sampling tube is coaxially inserted into the drill pipe, and then the upper end of the drill pipe is connected to the drive end in the drive assembly through a coupling, and the drill pipe is set vertically with the lower end in contact with the ground. The drive assembly is started, and the drill pipe and the sampling tube will gradually enter the underground, thereby allowing the soil to enter the sampling tube in a hierarchical manner.

[0004] Since the bottom of the existing sampling tube is hollow, the soil at the bottom of the sampling tube is still connected to the soil in the stratum after the sampling tube is filled with soil. When the drill tube is pulled upward after the sampling tube is filled with soil, the soil in the stratum will pull the soil at the bottom of the sampling tube, which can easily cause the soil sample at the bottom of the sampling tube to slip. In the process of the drill tube moving upward, the drill tube will inevitably vibrate due to friction with the inner wall of the formation borehole, which will undoubtedly cause the remaining soil in the sampling tube to slip, resulting in the inability to completely sample the soil sample in a hierarchical manner, which is not conducive to the subsequent detection of soil organic carbon. Summary of the invention

[0005] The present invention provides a soil sampling device for detecting organic carbon in forest soil. After the sampling tube is filled with soil samples, the device can seal the bottom of the sampling tube without causing soil slippage, thereby ensuring the hierarchical integrity of the soil sample.

[0006] The present invention provides a soil sampling device for detecting organic carbon in forest soil, comprising a sampling tube and a barrier assembly placed at the bottom of the sampling tube, wherein the barrier assembly comprises: a plurality of barrier plates, a plurality of collars, and a plurality of hinge supports, wherein the plurality of barrier plates are all fan-shaped, and when the barrier plates are in a horizontal state and their tips are opposite to each other, they form a disc shape for blocking the bottom of the sampling tube, and a rotating shaft is fixedly connected to the arc surface of the barrier plate away from the tip and directly opposite to the tip, and the axis of the rotating shaft extends toward the tip of the barrier plate, and the position and size of the sampling tube corresponding to each rotating shaft are uniform. A through-port is opened, and the bottom of the groove where the sampling tube is located at each through-port is vertically opened with a through-slot that matches the thickness of the blocking plate. A plurality of rings are rotatably sleeved on the ends of each rotating shaft away from the blocking plate, so that the plate surface of the blocking plate can be flipped under the action of external force. A plurality of hinge supports are fixedly connected to the outer wall of the sampling tube, and the position of each hinge support corresponds to that of each ring. The ring and the hinge support are hinged through a vertically arranged first hinge shaft. Under the action of external force, the blocking plate with the plate surface in a horizontal state can be rotated through the through-slot.

[0007] Preferably, the outer wall of the sampling tube is located above the through-port and is threadedly connected with a threaded sleeve, the threaded sleeve rotating sleeve is provided with a rotating sleeve, the rotating sleeve is connected to a plurality of first drive assemblies, each first drive assembly corresponds to the position and quantity of each collar, the rotation of the threaded sleeve can drive each blocking plate to rotate synchronously around the first hinge axis through each first drive assembly, the first drive assembly comprises: a fixed block, a connecting rod, and an extension plate, the fixed block is fixedly connected to the outer wall of the rotating sleeve, the first end of the connecting rod is hinged to the fixed block through the second hinge axis, the second end extends obliquely downward, the extension plate is fixedly connected to one side of the collar, when the tip of the blocking plate is downward, the end of the extension plate extends horizontally toward the side away from the sampling tube, the end of the extension plate away from the collar is horizontally inserted with a third hinge axis, the second end of the connecting rod is hinged to the third hinge axis, and the axes of the first hinge axis and the second hinge axis are located in the same vertical plane.

[0008] Preferably, each rotating shaft has an end portion away from the baffle plate fixedly connected with a fixing pin, and when the axis of the rotating shaft extends vertically, the fixing pin extends horizontally, and the end portion away from the rotating shaft contacts the outer wall of the sampling tube.

[0009] Preferably, a fixing ring is provided outside the rotating sleeve, a spacing is left between the fixing ring and the rotating sleeve, the fixing ring is fixedly connected to each fixed block, a plurality of waist-shaped holes are opened through the fixing ring along its axial direction corresponding to the position of each extension plate, a striker is hingedly connected with a fourth hinge shaft in the waist-shaped hole through the fourth hinge shaft, the axis of each fourth hinge shaft extends toward the center line direction of the sampling tube, the upper end of the striker passes through the waist-shaped hole, the length of the striker below the fourth hinge shaft is longer than the length above the fourth hinge shaft, a rotating ring is rotatably connected to the fixing ring, a plurality of openings are opened vertically corresponding to the position of each waist-shaped hole in the rotating ring, the striker is placed in the corresponding opening, and the rotating ring is rotated when the axis of the rotating shaft extends in the horizontal direction so that the lower end of the striker hits the fixing pin to drive the blocking plate to face up or down.

[0010] Preferably, the through opening is waist-shaped, and when the rotating shaft is in a horizontal state, the rotating shaft and the through opening are clearance-matched, providing an escape space for the rotating shaft.

[0011] Preferably, each straight edge of the baffle plate is provided with an inclined groove for cutting the soil, similar to a blade, which is conducive to rapid cutting of the soil.

[0012] Preferably, the number of the blocking plates is greater than or equal to 10.

[0013] Preferably, when the threaded sleeve is located at the uppermost part of the sampling tube, the side walls of each blocking plate adjacent to the sampling tube all block the through-slits.

[0014] Preferably, there are two connecting rods on each fixed block, the two connecting rods are respectively located on both sides of the fixed block, and the two connecting rods are respectively located on both sides of the rotating shaft to improve stability when cutting the soil.

[0015] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following advantages: the barrier component provided in the device is used to cut off the soil at the bottom of the sampling tube and the soil in the stratum that is in a connected state after the sampling tube is filled with soil samples, and at the same time, the bottom of the sampling tube can be sealed after cutting. Specifically, the rotating shaft and the collar provided therein can utilize the rotation characteristics of the two to realize the rotation of the rotating shaft, so as to drive the flipping effect of the blocking plate surface. When the plate surfaces of each blocking plate are in a horizontal direction, after controlling each rotating shaft to rotate 90° at the same time, each blocking plate can realize the rotary cutting of the soil during the self-rotation process, so as to realize the cutting off of the soil at the bottom of the sampling tube and the soil in the stratum that is in a connected state, and can avoid the phenomenon that when the drill pipe is pulled upward after the soil is filled in the sampling tube, the soil in the stratum pulls the soil at the bottom of the sampling tube, causing the soil sample at the bottom of the sampling tube to slip. By limiting multiple Each barrier plate is arranged in a fan shape, so that after the soil is rotary cut, each barrier plate is in a horizontal state and the tips are opposite to each other, so that they can form a disk with the same inner diameter as the sampling tube, so that the disk can be used to achieve the beneficial effect of preventing soil from falling off. Even if the friction between the drill pipe and the inner wall of the stratum borehole produces vibration during the upward movement of the drill pipe, the remaining soil in the sampling tube will not slip, thereby ensuring the hierarchical integrity of the soil sample and facilitating the subsequent detection of soil organic carbon. Considering that the bottom of traditional sampling tubes is hollow, the barrier plates set up will undoubtedly cause positional interference to the sampled soil. Therefore, the hinge support is set to support the rotating shaft and the ring, and the ring can also drive the rotating shaft and the barrier plate to rotate around the first hinge axis, so that the barrier plate and the rotating shaft can rotate into the through-slit. When the sampling is completed, the barrier plate and the rotating shaft can be controlled to rotate upward around the first hinge axis toward the middle side of the sampling tube for cutting and then turned over for cutting to achieve blocking.

[0016] In summary, this device can cut off the soil at the bottom of the sampling tube that is connected to the stratum after the sampling tube is filled with soil samples. After cutting, the bottom of the sampling tube can be sealed without causing soil slippage, thereby ensuring the hierarchical integrity of the soil sample.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of a blocking state of a baffle plate in a soil sampling device for detecting organic carbon in forest soil provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of a sampling tube in a soil sampling device for detecting organic carbon in forest soil provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a partial structure from a top view of a soil sampling device for detecting organic carbon in forest soil provided by an embodiment of the present invention, in a blocked state of a baffle plate;

[0022] Figure 4 A schematic structural diagram of a soil sampling device for detecting organic carbon in forest soil provided by an embodiment of the present invention, showing a state where a barrier plate is recovered and soil is collected;

[0023] Figure 5 for Figure 4 A partial enlarged view of part A;

[0024] Figure 6 A schematic diagram of a cross-sectional structure of the internal part of a soil sampling device for detecting organic carbon in forest soil provided by an embodiment of the present invention from a horizontal perspective;

[0025] Figure 7 A partial structural schematic diagram of a soil sampling device for detecting organic carbon in forest soil provided by an embodiment of the present invention;

[0026] Figure 8 A partial structural schematic diagram of a soil sampling device for detecting organic carbon in forest soil provided by an embodiment of the present invention;

[0027] Fig. 9 A partial structural schematic diagram of a soil sampling device for detecting organic carbon in forest soil provided by an embodiment of the present invention;

[0028] Fig.10 A partial structural schematic diagram of a soil sampling device for detecting organic carbon in forest soil provided in an embodiment of the present invention.

[0029] Description of Reference Numerals

[0030] 1. Sampling tube; 11. Through-hole; 12. Through-slit; 2. Blocking assembly; 21. Blocking plate; 22. Rotating shaft; 23. Ring; 24. Hinge support; 25. First hinge shaft; 3. Threaded sleeve; 31. Rotating sleeve; 4. First driving assembly; 41. Fixed block; 42. Connecting rod; 43. Second hinge shaft; 44. Extension plate; 45. Third hinge shaft; 5. Fixed pin; 6. Fixed ring; 61. Waist-shaped hole; 62. Strike rod; 63. Fourth hinge shaft; 7. Rotating ring; 71. Opening; 8. Drill pipe. DETAILED DESCRIPTION

[0031] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0032] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the embodiments of the present invention, unless otherwise specified, “plurality” means two or more.

[0034] refer to Figure 1 , Figure 2 and Figure 8The present invention provides a soil sampling device for detecting organic carbon in forest soil, comprising a sampling tube 1 and a blocking component 2 placed at the bottom of the sampling tube 1, wherein the blocking component 2 comprises: a plurality of blocking plates 21, a plurality of collars 23, and a plurality of hinge supports 24, wherein the plurality of blocking plates 21 are all fan-shaped, and each blocking plate 21 is placed in the sampling tube 1, and each blocking plate 21 is in a horizontal state and when its tips are opposite, it forms a disk shape for blocking the bottom of the sampling tube 1, and a rotating shaft 22 is fixedly connected to the arc surface of the blocking plate 21 away from its tip and directly opposite to the tip, and the axis of the rotating shaft 22 extends toward the tip of the blocking plate 21, and the sampling tube 1 corresponds to the position and The sampling tube 1 is provided with a through-hole 11 of different sizes. The bottom of the groove of each through-hole 11 of the sampling tube 1 is vertically provided with a through-slit 12 matching the thickness of the blocking plate 21. A plurality of collars 23 are respectively rotatably sleeved on the ends of each rotating shaft 22 away from the blocking plate 21. Under the action of external force, the plate surface of the blocking plate 21 is turned over. A plurality of hinge supports 24 are fixedly connected to the outer wall of the sampling tube 1, and the positions of each hinge support 24 and each collar 23 correspond one by one. The collar 23 and the hinge support 24 are hingedly connected by a horizontally arranged first hinge shaft 25. Under the action of external force, the blocking plate 21 with the plate surface in a vertical state can be rotated through the through-slit 12, such as Figure 6 As shown, a threaded rotary cutter is provided on the outer ring of the drill pipe 8, and the drill pipe 8 is sleeved on the outside of the sampling tube 1.

[0035] In the above embodiments, the barrier component 2 provided in the device is used to realize that after the sampling tube 1 is filled with soil samples, the soil at the bottom of the sampling tube 1 and the soil in a connected state with the stratum are cut off. At the same time, after cutting, the bottom of the sampling tube 1 can be sealed. Specifically, the rotating shaft 22 and the collar 23 provided therein can utilize the rotation characteristics of the two to realize the rotation of the rotating shaft 22 to drive the flipping effect of the surface of the barrier plate 21. When the surface of each barrier plate 21 is in the horizontal direction, after controlling each rotating shaft 22 to rotate 90°, each barrier plate 21 can realize the rotary cutting of the soil during the rotation process, so as to realize the soil at the bottom of the sampling tube 1 and the soil in a connected state with the stratum. The soil is cut off during rotary cutting, which can prevent the soil in the stratum from pulling the soil at the bottom of the sampling tube 1 when the drill pipe 8 is pulled upward after the soil is filled in the sampling tube 1, thereby preventing the soil sample at the bottom of the sampling tube 1 from slipping off. By limiting the plurality of baffles 21 to be fan-shaped, each baffle 21 can be in a horizontal state after rotary cutting of the soil and when the tips are opposite, a disk with the same inner diameter as the sampling tube 1 can be formed, so that the disk can be used to achieve the beneficial effect of preventing the soil from falling off. Even if the drill pipe 8 vibrates due to friction with the inner wall of the stratum borehole during the upward movement of the drill pipe 8, the remaining soil in the sampling tube will not slip off, thereby ensuring the hierarchical integrity of the soil sample and facilitating the subsequent detection of organic carbon in the soil.

[0036] This embodiment takes into account that the bottom of the traditional sampling tube 1 is hollow, and the baffle plate 21 set up will undoubtedly cause position interference to the sampled soil. Therefore, the hinge support 24 is set up to support the rotating shaft 22 and the ring 23, and the ring 23 can also drive the rotating shaft 22 and the baffle plate 21 to rotate around the first hinge axis 25, so that the baffle plate 21 and the rotating shaft 22 can rotate into the through-slit 12. When the sampling is completed, the baffle plate 21 and the rotating shaft 22 can be controlled to rotate upward around the first hinge axis 25 toward the middle side of the sampling tube 1 for cutting, peeling and blocking.

[0037] In summary, the device can cut off the soil at the bottom of the sampling tube 1 that is connected to the stratum after the sampling tube 1 is filled with soil samples. After cutting, the bottom of the sampling tube 1 is sealed, and the soil will not slip, thereby ensuring the hierarchical integrity of the soil sample.

[0038] Further, refer to Figure 5 , Figure 6 and Fig.10 The outer wall of the sampling tube 1 is located above the through-hole 11 and is threadedly connected with a threaded sleeve 3. The threaded sleeve 3 is rotatably sleeved with a rotating sleeve 31. The rotating sleeve 31 is connected with a plurality of first driving components 4. The position and quantity of each first driving component 4 correspond to each collar 23. The rotation of the threaded sleeve 3 can drive each blocking plate 21 to rotate synchronously around the first hinge shaft 25 through each first driving component 4. The first driving component 4 includes: a fixed block 41, a connecting rod 42, and an extension plate 44. The fixed block 41 and the rotating sleeve 3 1, the first end of the connecting rod 42 is hinged to the fixing block 41 through the second hinge shaft 43, and the second end is obliquely extended downward, the extension plate 44 is fixed to one side of the collar 23, when the tip of the blocking plate 21 is downward, the end of the extension plate 44 is horizontally extended toward the side away from the sampling tube 1, and the end of the extension plate 44 away from the collar 23 is horizontally inserted with a third hinge shaft 45, the second end of the connecting rod 42 is hinged to the third hinge shaft 45, and the axes of the first hinge shaft 25 and the second hinge shaft 43 are located in the same vertical plane.

[0039] In the above embodiments, the rotating sleeve 3 can be driven to move downward by rotating the threaded sleeve 3. Since the rotating sleeve 31 is limited by the first driving assembly 4, it can drive each fixed block 41 to move vertically. During the movement, a downward force is given to the extension plate 44 through the connecting rod 42, so that the extension plate 44, the rotating shaft 22 and the blocking plate 21 rotate counterclockwise around the first hinge shaft 25, thereby driving each blocking plate 21 to continue to rotate upward and cut the excess soil at the bottom. At this time, the rotating shaft 22 is controlled to rotate 90° to achieve longitudinal rotation cutting. When the tips of the blocking plates 21 are relative, a blocking effect can be achieved.

[0040] Further, refer to Figure 5and Figure 7 The ends of each rotating shaft 22 away from the blocking plate 21 are fixedly connected with a fixing pin 5. When the axis of the rotating shaft 22 extends vertically, the fixing pin 5 extends horizontally, and the ends away from the rotating shaft 22 contact the outer wall of the sampling tube 1.

[0041] In the above embodiments, the fixing pin 5 is provided to limit the clockwise rotation limit position of the blocking plate 21 .

[0042] Further, refer to Figure 7 , Figure 8 and Fig. 9 A fixing ring 6 is arranged on the outer surface of the rotating sleeve 31, and a spacing is left between the fixing ring 6 and the rotating sleeve 31. The fixing ring 6 is fixedly connected to each fixing block 41. A plurality of waist-shaped holes 61 are opened along the axial direction of the fixing ring 6 corresponding to the position of each extension plate 44. A striker 62 is hingedly connected to the waist-shaped hole 61 through a fourth hinge shaft 63. The axis of each fourth hinge shaft 63 extends toward the center line direction of the sampling tube 1. The upper end of the striker 62 passes through the waist-shaped hole 61. The length of the striker 62 below the fourth hinge shaft 63 is longer than the length above the fourth hinge shaft 63. A rotating ring 7 is rotatably connected to the fixing ring 6. The rotating ring 7 corresponds to the position of each waist-shaped hole 61 and has a plurality of openings 71 opened vertically. The striker 62 is placed in the corresponding opening 71. When the axis of the rotating shaft 22 extends in the horizontal direction, the rotating ring 7 is rotated so that the lower end of the striker 62 collides with the fixing pin 5 to drive the baffle plate 21 to face up or down.

[0043] In the above embodiments, Figure 1 As shown, when the rotating sleeve 31 moves downward, the fixed ring 6 and the rotating ring 7 will also move downward. At this time, the impact rod 62 is located on the adjacent side of the fixed pin 5. At this time, by rotating the rotating ring 7, the solid part on the opening 71 side of the rotating ring 7 will hit the upper end of the impact rod 62. The impact rod 62 gives a rotational force to the fixed pin 5 through the lever principle, causing it to drive the blocking plate 21 to rotate 90°.

[0044] Further, refer to Figure 2 The through opening 11 is waist-shaped. When the rotating shaft 22 is in a horizontal state, the rotating shaft 22 and the through opening 11 are loosely matched.

[0045] In the above embodiments, the through hole 11 can limit the rotating shaft 22. When the rotating shaft 22 rotates counterclockwise to the extreme position, it will be blocked by the upper wall of the through hole 11, thereby ensuring that the blocking plate 21 can be combined to form a disc after rotating 90° around the rotating shaft 22.

[0046] Further, refer to Figure 3 and Figure 4 Each straight edge of the baffle plate 21 is provided with an inclined groove for cutting the soil.

[0047] In the above embodiments, the inclined grooves are provided to facilitate the cutting effect of the soil.

[0048] Further, refer to Figure 3 , the number of the blocking plates 21 is greater than or equal to 10.

[0049] In the above embodiments, a larger number can greatly reduce the resistance during the peeling process. Considering the cost, 22 are preferred in this embodiment.

[0050] Further, refer to Figure 4 and Fig.10 When the threaded sleeve 3 is located at the top of the sampling tube 1 , the side walls of each blocking plate 21 adjacent to the sampling tube 1 block the through-slit 12 .

[0051] In the above embodiments, in order to prevent soil from entering the cavity through the through-slit 12, a sealing and leak-proof effect is further achieved.

[0052] Further, refer to Figure 5 There are two connecting rods 42 on each fixed block 41 , and the two connecting rods 42 are respectively located on both sides of the fixed block 41 , and the two connecting rods 42 are respectively located on both sides of the rotating shaft 22 .

[0053] In the above embodiments, the two connecting rods 42 are provided to improve the stability during soil cutting and the cutting efficiency.

[0054] It includes a drill pipe 8 coaxially fixed to the outside of the sampling tube 1, with a conical bottom and welded to the sampling tube 1. A spiral blade is provided on the outer wall of the drill pipe 8 to facilitate drilling the soil. A cavity is left between the drill pipe 8 and the sampling tube 1, and the threaded sleeve 3, the rotating sleeve 31, the first drive assembly 4, the second drive assembly, etc. are all placed in the cavity.

[0055] The upper end of the threaded sleeve 3 is fixedly connected with a plurality of rods, the upper ends of the rods extend out of the soil, and the upper ends of the rods are connected by connecting pieces, which may be disc-shaped, so that the operator can rotate it to drive the threaded sleeve 3 to rotate.

[0056] Specifically, for the rotation of the rotating ring 7, as with the threaded sleeve 3, multiple rods can be provided and extended upward out of the soil. When the rotating ring 7 needs to be adjusted, remote control above the soil can be achieved, which is very convenient. The rods on the threaded sleeve 3 and the rotating ring 7 can be adjusted manually or by a motor or other driving method, which is not further limited in this embodiment.

[0057] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0058] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A soil sampling device for detecting forest soil organic carbon, characterized in that: The invention comprises a sampling tube (1) and a barrier component (2) arranged at the bottom of the sampling tube (1), wherein the barrier component (2) comprises: A plurality of baffles (21) are fan-shaped, each straight side of the baffles (21) is provided with an inclined groove for cutting soil, and when each baffle (21) is in a horizontal state and the tips are facing each other, a disc is formed for blocking the bottom of the sampling tube (1), a rotating shaft (22) is fixedly connected to the arc surface of the baffle (21) away from the tip and directly opposite to the tip, and the axis of the rotating shaft (22) extends toward the tip of the baffle (21), and the sampling tube (1) is provided with a through hole (11) corresponding to the position and size of each rotating shaft (22), and a through seam (12) matching the thickness of the baffle (21) is vertically provided at the bottom of the groove of the sampling tube (1) located at each through hole (11); A plurality of collars (23) are respectively rotatably sleeved on the ends of the rotating shafts (22) away from the blocking plate (21), and the plate surface of the blocking plate (21) is turned over under the action of a rotating external force; A plurality of hinge supports (24) are fixedly connected to the outer wall of the sampling tube (1), and the positions of the hinge supports (24) and the collars (23) correspond one to one. The collars (23) and the hinge supports (24) are hingedly connected via a first hinge shaft (25) arranged horizontally. Under the action of a rotating external force, the blocking plate (21) with the plate surface in a vertical state can be rotated to pass through the through-slit (12). When the plate surfaces of the blocking plates (21) are all in a horizontal direction, and the rotating shafts (22) are controlled to rotate 90 degrees at the same time, the blocking plates (21) can realize soil rotary cutting during the self-rotation process. At this time, the soil at the bottom of the sampling tube (1) and the soil in a connected state of the stratum can be cut off. After rotary cutting the soil, the blocking plates (21) are in a horizontal state and their tips are opposite to each other, so that they can form a disk with the same inner diameter as the sampling tube (1), so as to realize the shedding of the blocked soil.

2. A soil sampling device for detecting forest soil organic carbon as claimed in claim 1, characterized in that: The outer wall of the sampling tube (1) is threadedly connected with a threaded sleeve (3) located above the through-hole (11); the threaded sleeve (3) is rotatably sleeved with a rotating sleeve (31); the rotating sleeve (31) is connected with a plurality of first drive assemblies (4); the position and number of each of the first drive assemblies (4) correspond one-to-one to each of the collars (23); the rotation of the threaded sleeve (3) can drive each of the blocking plates (21) to rotate synchronously around the first hinge shaft (25) through each of the first drive assemblies (4).

3. A soil sampling device for detecting forest soil organic carbon as claimed in claim 2, characterized in that: The first drive assembly (4) comprises: A fixed block (41) is fixedly connected to the outer wall of the rotating sleeve (31); A connecting rod (42), a first end of which is hinged to the fixing block (41) via a second hinge shaft (43), and a second end of which extends obliquely downward; An extension plate (44) is fixedly connected to one side of the collar (23). When the tip of the baffle plate (21) is downward, the end of the extension plate (44) extends horizontally toward the side away from the sampling tube (1). A third hinge shaft (45) is horizontally inserted into the end of the extension plate (44) away from the collar (23). The second end of the connecting rod (42) is hinged to the third hinge shaft (45). The axes of the first hinge shaft (25) and the second hinge shaft (43) are located on the same vertical plane.

4. A soil sampling device for detecting forest soil organic carbon as claimed in claim 3, characterized in that: The end of each rotating shaft (22) away from the blocking plate (21) is fixedly connected with a fixing pin (5). When the axis of the rotating shaft (22) extends vertically, the fixing pin (5) extends horizontally, and the end away from the rotating shaft (22) contacts the outer wall of the sampling tube (1).

5. A soil sampling device for detecting forest soil organic carbon as claimed in claim 4, characterized in that: The rotating sleeve (31) is provided with a fixing ring (6) on its outer surface, and a spacing is reserved between the fixing ring (6) and the rotating sleeve (31). The fixing ring (6) is fixedly connected to each fixing block (41). The fixing ring (6) is provided with a plurality of waist-shaped holes (61) penetrating along its axial direction at positions corresponding to each extension plate (44). A striker (62) is hingedly connected in the waist-shaped hole (61) via a fourth hinge shaft (63). The axis of each fourth hinge shaft (63) extends toward the center line direction of the sampling tube (1). The upper end of the striker (62) passes through the waist-shaped hole (61). The length of the striker (62) below the fourth hinge shaft (63) is longer than the length above the fourth hinge shaft (63). A rotating ring (7) is rotatably connected to the fixed ring (6). The rotating ring (7) is vertically provided with a plurality of openings (71) at positions corresponding to the waist-shaped holes (61). The striker (62) is placed in the corresponding openings (71). When the axis of the rotating shaft (22) extends in the horizontal direction, the rotating ring (7) is rotated so that the lower end of the striker (62) collides with the fixed pin (5) to deflect and drive the baffle plate (21) to face upward or downward.

6. A soil sampling device for detecting forest soil organic carbon as claimed in claim 1, characterized in that: The through opening (11) is waist-shaped, and when the rotating shaft (22) is in a horizontal state, the rotating shaft (22) and the through opening (11) are clearance-matched.

7. A soil sampling device for detecting forest soil organic carbon as claimed in claim 1, characterized in that: The number of the baffle plates (21) is greater than or equal to 10.

8. A soil sampling device for detecting forest soil organic carbon as claimed in claim 2, characterized in that: When the threaded sleeve (3) is located at the top of the sampling tube (1), the side walls of each of the blocking plates (21) adjacent to the sampling tube (1) block the through-slit (12).

9. A soil sampling device for detecting forest soil organic carbon as claimed in claim 3, characterized in that: There are two connecting rods (42) on each of the fixed blocks (41), and the two connecting rods (42) are respectively located on both sides of the fixed block (41), and the two connecting rods (42) are respectively located on both sides of the rotating shaft (22).

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