A soil sampling device for gobi desert shallow coverage area

Abstract

The present application relates to a kind of gobi desert shallow covering area soil sampling device, belong to geological exploration technical field, including top plate, multiple cylinder is sequentially stacked in the bottom of top plate along vertical direction, multiple first rotating shafts are equally spaced around the annular mounting groove between the vertically arranged adjacent two cylinder, multiple connecting columns are equally spaced around vertically arranged on top plate, multiple arc limit rods are equally spaced embedded in annular mounting groove, drive mechanism is set on top plate, for rotating multiple connecting columns is driven and rotates same;The present application can use multiple cylinder to form sampling barrel to carry out soil sampling, then use drive mechanism to drive arc connecting rod to rotate, soil in cylinder is clamped and fixed from side, can avoid the soil collected to fall off, multiple cylinder is separated one by one then soil is taken out respectively, avoid excessive extrusion soil, make the position information of soil in cylinder close to the actual depth of soil layer as far as possible, improve the accuracy of geological exploration investigation.

Description

Technical Field

[0001] This invention belongs to the field of geological exploration technology, specifically relating to a soil sampling device for shallowly covered areas in the Gobi Desert. Background Technology

[0002] Soil sampling is a crucial task in mineral resource surveys. By analyzing the elemental content and mineral composition of the soil, the distribution of underground mineral resources can be indirectly inferred. Soil sampling typically involves vertically inserting a sampling tube into the soil and then retrieving it upwards to obtain a soil sample. Testing the collected soil sample requires first removing it from the sampling tube, then performing chemical analysis to conduct geological exploration. However, due to the loose soil in the Gobi Desert region, existing sampling tubes often experience poor soil stability during the upward extraction process, leading to soil loss and reduced sampling effectiveness in shallowly covered areas of the Gobi Desert.

[0003] Currently, when sampling soil in shallowly covered areas of the Gobi Desert, most methods involve installing two movable sealing plates at the bottom of the sampling tube. After sampling, these plates are closed to seal the bottom of the tube, preventing soil samples from falling out when the tube is removed and improving sampling efficiency. However, when testing different soil layers, the test results need to be recorded in relation to the depth of the soil layer, often determined by the position of the soil sample within the sampling tube.

[0004] When removing soil samples from the sampling tube, it is necessary to avoid the soil samples falling around and changing their position. The sampling tube should be placed horizontally, and the soil sample should be slowly pushed out from one end of the tube. Because the pushing force acts directly on one end of the soil sample in the sampling tube, the soil sample in the tube will be compressed, causing a difference between the position information of the soil sample in the sampling tube and the actual depth of the soil layer, resulting in lower accuracy of geological exploration and investigation. Summary of the Invention

[0005] In view of this, the present invention provides a soil sampling device for shallowly covered areas in the Gobi Desert to overcome the shortcomings of the prior art. The present invention can make the location information of the soil in the cylinder as close as possible to the actual depth of the soil layer, thereby improving the accuracy of geological exploration and investigation.

[0006] The technical solution of this invention is: a soil sampling device for shallowly covered areas of the Gobi Desert, comprising a top plate, multiple cylinders stacked vertically at the bottom of the top plate, the multiple cylinders being coaxially arranged, adjacent cylinders being detachably connected, the uppermost cylinder being detachably connected to the top plate to form a sampling bucket, first countersunk holes being opened on the upper and lower end faces of the cylinders respectively, the first countersunk holes being coaxially arranged with the cylinders, two first countersunk holes on the end faces of two adjacent cylinders forming an annular mounting groove, multiple first rotating shafts being equally spaced and vertically arranged around the annular mounting groove between two adjacent cylinders, the first rotating shafts being rotatably connected to the cylinders, and multiple connecting columns being equally spaced. The connecting column is vertically mounted on the top plate and is rotatably connected to the top plate. The cross-section of the connecting column is a regular polygon. The connecting column passes through the cylinder and the first rotating shaft in sequence. The connecting column is rotatably connected to the cylinder and is engaged with the first rotating shaft. Multiple arc-shaped limiting rods are equally spaced and embedded in the annular mounting groove. The arc-shaped limiting rods are located between two adjacent first rotating shafts. One end of the multiple arc-shaped limiting rods is fixedly connected to the first rotating shaft in a clockwise or counterclockwise direction. The driving mechanism is mounted on the top plate. The output end of the driving mechanism is connected to the multiple connecting columns to drive the multiple connecting columns to rotate in the same way.

[0007] Preferably, the drive mechanism includes a second rotating shaft, which is vertically arranged on the upper side of the top plate. The second rotating shaft is coaxial with the cylinder and rotatably connected to the top plate. A transmission mechanism is provided on the top plate. The input end of the transmission mechanism is connected to the second rotating shaft, and its output end is connected to multiple connecting columns.

[0008] Preferably, the transmission mechanism includes a first gear, a cavity is provided inside the top plate, one end of a second rotating shaft extends into the cavity, the second rotating shaft is rotatably connected to the bottom inner wall of the cavity, the first gear is fixedly mounted on one side of the second rotating shaft located inside the cavity, a plurality of second gears are arranged at equal intervals around the outside of the first gear in the cavity, the second gears are meshed with the first gear, a connecting post passes through the second gear and is connected to it, and a handwheel is fixedly provided at the end of the second rotating shaft away from the first gear.

[0009] Preferably, the second gear is provided with an internal hexagonal prism tube and is fixedly connected to it. The internal hexagonal prism tube is coaxial with the second gear. Both ends of the internal hexagonal prism tube are rotatably connected to the inner wall of the cavity. The connecting column passes through the internal hexagonal prism tube and is engaged with it.

[0010] Preferably, a first through hole is vertically opened on the first rotating shaft and is coaxial with it. The cross-section of the first through hole is a regular polygon. The connecting column passes through the first through hole and is connected to it. Multiple second countersunk holes are vertically opened at equal intervals around the first countersunk hole at the top of the cylinder. A connecting pipe is vertically fixed at the bottom of the first rotating shaft and is coaxial with it. The connecting pipe is embedded in the second countersunk hole and is rotatably connected to it. A second through hole is vertically opened on the side of the cylinder away from the first rotating shaft at the second countersunk hole. The second through hole is coaxial with the second countersunk hole. The connecting column passes through the second through hole and is rotatably connected to it.

[0011] Preferably, a limiting block is fixed to the top plate at the end of the connecting column away from the cylinder. A spring is sleeved between the limiting block and the top plate on the connecting column. One end of the spring is connected to the limiting block, and the other end is connected to the top plate. The other end of the connecting column extends into the first countersunk hole at the bottom of the lowest cylinder. A limiting member is sleeved on the end of the connecting column away from the limiting block and is threadedly connected to it.

[0012] Preferably, an annular base is horizontally positioned directly below the top plate, and two internally threaded tubes are symmetrically and vertically positioned on the outer side of the top plate. The internally threaded tubes are connected to the top plate, and a screw is threaded through the internally threaded tube and connected to it. One end of the screw is rotatably connected to the annular base, and a first motor is fixedly mounted on the annular base. The output shaft of the first motor is fixedly connected to the screw.

[0013] Preferably, an annular groove is provided on the outer side of the top plate and is coaxial with it. Two sliders are embedded in the annular groove and are slidably connected to it. A horizontal crossbar is provided between the sliders and the internally threaded tube. One end of the crossbar is fixedly connected to the slider and the other end is fixedly connected to the internally threaded tube.

[0014] Preferably, a ring gear is horizontally fixed to the bottom of the top plate and coaxial with it, a second motor is horizontally fixed to the lower side of the crossbar, and a third gear is fixedly mounted on the output shaft of the second motor, and the third gear meshes with the ring gear.

[0015] Compared with existing technologies, the soil sampling device for shallowly covered areas in the Gobi Desert provided by this invention uses a top plate, a first sinkhole on the cylinder, a first rotating shaft, a connecting column, and an arc-shaped connecting rod in combination. It can use a sampling bucket composed of multiple cylinders to collect soil samples. After sampling, the driving mechanism drives the arc-shaped connecting rod to rotate, clamping and fixing the soil in the cylinder from the side, which can prevent the collected soil from falling off. During testing, the multiple cylinders are separated one by one and the soil is taken out separately, which can avoid excessive compression of the soil and make the position information of the soil in the cylinder as close as possible to the actual depth of the soil layer, thereby improving the accuracy of geological exploration and investigation. Attached Figure Description

[0016] Figure 1 This is a front view of the sampling device of the present invention;

[0017] Figure 2 This is a top view of the sampling device of the present invention;

[0018] Figure 3 This is the present invention. Figure 1 AA section view in the middle;

[0019] Figure 4 This is the present invention. Figure 2 BB section view in the middle;

[0020] Figure 5 This is the present invention. Figure 4 Enlarged diagram of point C in the diagram;

[0021] Figure 6 This is the present invention. Figure 4 Enlarged diagram of point D in the diagram. Detailed Implementation

[0022] This invention provides a soil sampling device for shallowly covered areas of the Gobi Desert, which is described below in conjunction with... Figures 1 to 6 The present invention is illustrated by the structural diagram shown below.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] When sampling soil, a sampling tube is typically inserted vertically into the soil and then pulled out to obtain a soil sample. Testing the collected soil sample involves first removing it from the sampling tube, then performing laboratory analysis to conduct geological surveys. However, due to the loose soil in the Gobi Desert region, existing sampling tubes often experience soil instability during the upward extraction process, leading to the soil falling back down and resulting in poor sampling results in shallowly covered areas of the Gobi Desert.

[0025] Currently, when sampling soil in shallowly covered areas of the Gobi Desert, most methods involve installing two movable sealing plates at the bottom of the sampling tube. After sampling, these plates are closed to seal the bottom of the tube, preventing soil samples from falling out when the tube is removed and improving sampling efficiency. However, when testing different soil layers, the test results need to be recorded in relation to the depth of the soil layer, often determined by the position of the soil sample within the sampling tube.

[0026] When removing soil samples from the sampling tube, it is necessary to avoid the soil samples falling around and changing their position. The sampling tube should be placed horizontally, and the soil sample should be slowly pushed out from one end of the tube. Because the pushing force acts directly on one end of the soil sample in the sampling tube, the soil sample in the tube will be compressed, making the position information of the soil in the tube as close as possible to the actual depth of the soil layer, resulting in lower accuracy of geological exploration and investigation.

[0027] To address the aforementioned issues, this invention provides a soil sampling device for shallowly covered areas in the Gobi Desert. Through the coordinated use of a top plate, a first sinkhole on the cylinder, a first rotating shaft, a connecting column, and an arc-shaped connecting rod, it enables soil sampling using a sampling bucket composed of multiple cylinders. After sampling, a drive mechanism rotates the arc-shaped connecting rod, clamping and fixing the soil in the cylinder from the side, preventing soil detachment. During testing, the multiple cylinders are separated one by one before removing the soil individually, avoiding excessive soil compression. This ensures that the soil position information within the cylinder matches the actual soil depth, improving the accuracy of geological exploration and investigation. This soil sampling device is convenient to use, provides accurate information, and is highly practical, making it worthy of promotion.

[0028] Reference Figure 1 , Figure 1 This is a front view of the sampling device in this embodiment, as shown. Figure 1 As shown, a soil sampling device for shallowly covered areas in the Gobi Desert includes a top plate 1, multiple cylinders 2 stacked vertically at the bottom of the top plate 1, the cylinders 2 being coaxially arranged, adjacent cylinders 2 being detachably connected, the uppermost cylinder 2 being detachably connected to the top plate 1 to form a sampling bucket, first countersunk holes 3 being formed on the upper and lower end faces of the cylinders 2 respectively, the first countersunk holes 3 being coaxially arranged with the cylinders 2, the two first countersunk holes 3 on the end faces of two adjacent cylinders 2 forming an annular mounting groove, multiple first rotating shafts 4 being equidistantly arranged vertically around the annular mounting groove between two adjacent cylinders 2, the first rotating shafts 4 being rotatably connected to the cylinders 2, and multiple connecting columns 5 being equidistantly arranged around the vertical... The connecting column 5 is rotatably connected to the top plate 1. The cross-section of the connecting column 5 is a regular polygon. The connecting column 5 passes through the cylinder 2 and the first rotating shaft 4 in sequence. The connecting column 5 is rotatably connected to the cylinder 2 and the first rotating shaft 4. Multiple arc-shaped limiting rods 6 are equally spaced and embedded in the annular mounting groove. The arc-shaped limiting rods 6 are located between two adjacent first rotating shafts 4. One end of the multiple arc-shaped limiting rods 6 is fixedly connected to the first rotating shaft 4 in a clockwise or counterclockwise direction. The driving mechanism is set on the top plate 1. The output end of the driving mechanism is connected to the multiple connecting columns 5 to realize the rotation of the multiple connecting columns 5 in the same way.

[0029] Reference Figure 4 , Figure 4 This is a BB cross-sectional view of the sampling device in this embodiment, as shown. Figure 4As shown, as a further optimization, the driving mechanism in this embodiment includes a second rotating shaft 21, which is vertically arranged on the upper side of the top plate 1. The second rotating shaft 21 is coaxial with the cylinder 2 and rotatably connected to the top plate 1. A transmission mechanism is provided on the top plate 1. The input end of the transmission mechanism is connected to the second rotating shaft 21, and its output end is connected to multiple connecting columns 5.

[0030] In this embodiment, the second rotating shaft 21 is used in conjunction with the transmission mechanism to drive multiple connecting columns 5 to rotate in the same way, thereby enabling the arc-shaped connecting rods on the inner wall of the cylinder to simultaneously clamp and fix the soil, further improving the stability of the soil during sampling.

[0031] This embodiment provides a specific transmission mechanism, which includes a first gear 31. A cavity 32 is provided inside the top plate 1. One end of a second rotating shaft 21 extends into the cavity 32. The second rotating shaft 21 is rotatably connected to the bottom inner wall of the cavity 32. The first gear 31 is fitted and fixed on one side of the second rotating shaft 21 located inside the cavity 32. Multiple second gears 33 are arranged at equal intervals around the outside of the first gear 31 in the cavity 32. The second gears 33 mesh with the first gear 31. A connecting post 5 passes through the second gears 33 and is connected to them. A handwheel 34 is fixed at the end of the second rotating shaft 21 away from the first gear 31.

[0032] In this embodiment, the transmission mechanism utilizes the first gear, cavity, second gear, and handwheel in combination. The operator can manually rotate the second shaft, and then the meshing of the first and second gears drives multiple first shafts to rotate synchronously. This allows the arc-shaped connecting rod on the inner wall of the cylinder to simultaneously clamp and fix the soil, improving ease of use.

[0033] Reference Figure 6 , Figure 6 This is an enlarged schematic diagram of point D of the sampling device in this embodiment, as shown below. Figure 6 As shown, as a further optimization, in this embodiment, the second gear 33 is provided with an internal hexagonal prism tube 41 and is fixedly connected to it. The internal hexagonal prism tube 41 is coaxial with the second gear 33. The two ends of the internal hexagonal prism tube 41 are rotatably connected to the inner wall of the cavity 32. The connecting column 5 passes through the internal hexagonal prism tube 41 and is connected to it.

[0034] To further improve the flexibility of use, the number of cylinders can be flexibly adjusted according to the sampling depth by using limit blocks, springs and limit components. In addition, the springs ensure that multiple cylinders are tightly connected.

[0035] Reference Figure 3 and Figure 5 , Figure 3 This is a cross-sectional view (AA) of the sampling device in this embodiment. Figure 5 This is an enlarged schematic diagram of point C of the sampling device in this embodiment, as shown. Figure 3 , 5 As shown, as a further optimization, in this embodiment, a first through hole 51 is vertically formed on the first rotating shaft 4 and is coaxial with it. The cross-section of the first through hole 51 is a regular polygon. The connecting post 5 passes through the first through hole 51 and is connected to it. Multiple second countersunk holes 52 are vertically formed at equal intervals around the first countersunk hole 3 at the top of the cylinder 2. A connecting pipe 53 is vertically fixed at the bottom of the first rotating shaft 4 and is coaxial with it. The connecting pipe 53 is embedded in the second countersunk holes 52 and is rotatably connected to them. A second through hole 54 is vertically formed on the side of the cylinder 2 away from the second countersunk hole 52. The second through hole 54 is coaxial with the second countersunk hole 52. The connecting post 5 passes through the second through hole 54 and is rotatably connected to it. By using the first through hole on the first rotating shaft, the second countersunk holes on the cylinder, the connecting pipe, and the second through hole in combination, the first rotating shaft can be rotatably connected to the second countersunk hole on the cylinder through the connecting pipe. At the same time, the rotation of the connecting post drives the rotation of multiple first rotating shafts.

[0036] As a further optimization, in this embodiment, the end of the connecting column 5 away from the cylinder 2 extends out of the top plate 1 and is fixed with a limiting block 61. A spring 62 is sleeved between the limiting block 61 and the top plate 1. One end of the spring 62 is connected to the limiting block 61 and the other end is connected to the top plate 1. The other end of the connecting column 5 extends into the first countersunk hole 3 at the bottom of the lowest cylinder 2. A limiting member 63 is sleeved on the end of the connecting column 5 away from the limiting block 61 and is threadedly connected to it. A thrust bearing can be provided between the limiting member 63 and the cylinder, so that the limiting member 63 is rotatably connected to the cylinder.

[0037] Reference Figure 2 , Figure 2 This is a front view of the sampling device in this embodiment, as shown. Figure 2 As shown, as a further optimization, in this embodiment, an annular base 71 is horizontally provided directly below the top plate 1. Two internally threaded tubes 72 are symmetrically and vertically provided on the outer side of the top plate 1. The internally threaded tubes 72 are connected to the top plate 1. A screw 73 is passed through the internally threaded tube 72 and is threadedly connected to it. One end of the screw 73 is rotatably connected to the annular base 71. A first motor 74 is fixed on the annular base 71. The output shaft of the first motor 74 is fixedly connected to the screw 73. The first motor 74 is electrically connected to an external controller. The external controller can start and stop the first motor 74 and adjust its output power.

[0038] In this embodiment, the annular base, the internally threaded tube, the screw, and the first motor are used in combination to enable the screw to rotate driven by the first motor, which causes the internally threaded tube and the top plate to move downward, thereby causing the top plate to move the cylinder downward for sampling.

[0039] As a further optimization, in this embodiment, an annular groove 81 is provided on the outer side of the top plate 1 and is coaxial with it. Two sliders 82 are embedded in the annular groove 81 and are slidably connected to it. A horizontal bar 83 is provided between the sliders 82 and the internal threaded tube 72. One end of the horizontal bar 83 is fixedly connected to the slider 82 and the other end is fixedly connected to the internal threaded tube 72.

[0040] In this embodiment, the annular sinker, slider, and crossbar are used in conjunction to allow the top plate and cylinder to rotate on the annular base. This facilitates the downward movement of the cylinder for sampling. After sampling, rotating the top plate breaks the soil inside the cylinder, making it easy to remove the soil sample.

[0041] As a further optimization, in this embodiment, the bottom of the top plate 1 is horizontally fixed with an annular gear ring 91 and coaxial with it, and the lower side of the crossbar 83 is horizontally fixed with a second motor 92. The output shaft of the second motor 92 is fitted with a third gear 93, which meshes with the annular gear ring 91.

[0042] In this embodiment, the second motor and gear are used in conjunction to enable the second motor to drive the gear to rotate, which in turn causes the top plate to drive the cylinder to rotate, so that the cylinder is in a downward rotating posture for sampling, thereby increasing the downward movement speed of the cylinder. The second motor 92 is electrically connected to an external controller, which can start and stop the second motor 92 and adjust its output power.

[0043] During geological sampling, when soil sampling is required, firstly, according to the pre-designed sampling depth, select the corresponding number of cylinders and pass the connecting column sequentially through the second through hole on the cylinder, the first through hole on the first rotating shaft, and the connecting pipe. A limiting device is then fitted onto the connecting column on the lower side of the bottom cylinder to form a sampling bucket. Multiple cylinders are labeled from top to bottom to facilitate obtaining soil depth information based on the cylinder's position after sampling. After moving the device to the sampling position, operators stand on either side of the annular base to prevent the device from shaking during sampling. The first motor is then started by an external controller, which drives the screw to rotate, causing the internal threaded pipe and top plate to move downwards. This, in turn, causes the top plate to move the cylinder downwards. When the bottom cylinder approaches the ground, the second motor is driven by the external controller, which in turn drives the gears to rotate. The top plate rotates the cylinder, causing it to rotate downwards for sampling. Sampling is complete when the lower side of the top plate contacts the ground. The operator stops the second motor via an external controller and reverses the first motor to move the cylinder upwards. Once the bottom of the cylinder is higher than the sampling depth, the limiting piece on the connecting column is removed. As multiple people lift the sampling bucket and move it downwards to separate it from the connecting rod, the cylinder is moved horizontally one by one to collect the soil inside. When sampling the soil, the soil can be gently pushed out of the cylinder to avoid excessive compression and to ensure that the position of the soil in the cylinder is as close as possible to the actual depth of the soil layer. After use, the arc-shaped limiting rod and the first rotating shaft on each cylinder can be disassembled, cleaned, and then reassembled to prevent corrosion from soil substances and extend the device's service life.

[0044] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A soil sampling device for shallowly covered areas of the Gobi Desert, comprising a top plate (1), characterized in that, Also includes: Multiple cylinders (2) are stacked vertically at the bottom of the top plate (1). The multiple cylinders (2) are coaxially arranged with each other. Adjacent cylinders (2) are detachably connected. The uppermost cylinder (2) is detachably connected with the top plate (1) to form a sampling bucket. The upper and lower end faces of the cylinders (2) are respectively provided with first countersunk holes (3). The first countersunk holes (3) are coaxially arranged with the cylinders (2). The two first countersunk holes (3) on the end faces of two adjacent cylinders (2) form an annular mounting groove. Multiple first rotating shafts (4) are arranged at equal intervals around the annular mounting groove between two adjacent cylinders (2), and the first rotating shafts (4) are rotatably connected to the cylinders (2); Multiple connecting columns (5) are vertically arranged around the top plate (1) at equal intervals. The connecting columns (5) are rotatably connected to the top plate (1). The cross-section of the connecting column (5) is a regular polygon. The connecting column (5) passes through the cylinder (2) and the first rotating shaft (4) in sequence. The connecting column (5) is rotatably connected to the cylinder (2). The connecting column (5) is connected to the first rotating shaft (4) in a cooperative manner. Multiple arc-shaped limiting rods (6) are equally spaced and embedded in the annular mounting groove. The arc-shaped limiting rods (6) are located between two adjacent first rotating shafts (4). One end of each of the multiple arc-shaped limiting rods (6) is fixedly connected to the first rotating shaft (4) in a clockwise or counterclockwise direction. A drive mechanism is provided on the top plate (1). The output end of the drive mechanism is connected to multiple connecting columns (5) to drive the multiple connecting columns (5) to rotate in the same way.

2. The soil sampling device for shallowly covered areas of the Gobi Desert according to claim 1, characterized in that, The driving mechanism includes a second rotating shaft (21), which is vertically arranged on the upper side of the top plate (1). The second rotating shaft (21) is coaxial with the cylinder (2) and rotatably connected to the top plate (1). The top plate (1) is provided with a transmission mechanism. The input end of the transmission mechanism is connected to the second rotating shaft (21), and its output end is connected to a plurality of connecting columns (5).

3. A soil sampling device for shallowly covered areas of the Gobi Desert according to claim 2, characterized in that, The transmission mechanism includes a first gear (31), and a cavity (32) is provided inside the top plate (1). One end of the second rotating shaft (21) extends into the cavity (32). The second rotating shaft (21) is rotatably connected to the bottom inner wall of the cavity (32). The first gear (31) is fitted and fixed on one side of the second rotating shaft (21) located inside the cavity (32). Multiple second gears (33) are arranged at equal intervals around the outside of the first gear (31) in the cavity (32). The second gears (33) mesh with the first gear (31). The connecting column (5) passes through the second gear (33) and is connected to it. A handwheel (34) is fixed at one end of the second rotating shaft (21) away from the first gear (31).

4. A soil sampling device for shallowly covered areas of the Gobi Desert according to claim 3, characterized in that, The second gear (33) is provided with an internal hexagonal prism tube (41) and is fixedly connected to it. The internal hexagonal prism tube (41) is coaxial with the second gear (33). The two ends of the internal hexagonal prism tube (41) are rotatably connected to the inner wall of the cavity (32). The connecting column (5) passes through the internal hexagonal prism tube (41) and is connected to it.

5. A soil sampling device for shallowly covered areas of the Gobi Desert according to claim 1, characterized in that, The first rotating shaft (4) has a first through hole (51) vertically opened and coaxial with it. The cross-section of the first through hole (51) is a regular polygon. The connecting column (5) passes through the first through hole (51) and is connected to it. The cylinder (2) has a plurality of second countersunk holes (52) vertically opened at equal intervals around the first countersunk hole (3) at its top. The bottom of the first rotating shaft (4) is vertically fixed with a connecting pipe (53) and coaxial with it. The connecting pipe (53) is embedded in the second countersunk hole (52) and is rotatably connected to it. The cylinder (2) has a second through hole (54) vertically opened on the side of the second countersunk hole (52) away from the first rotating shaft (4). The second through hole (54) is coaxial with the second countersunk hole (52). The connecting column (5) passes through the second through hole (54) and is rotatably connected to it.

6. A soil sampling device for shallowly covered areas of the Gobi Desert according to claim 1, characterized in that, The end of the connecting post (5) away from the cylinder (2) extends out of the top plate (1) and is fixed with a limiting block (61). A spring (62) is sleeved between the limiting block (61) and the top plate (1) of the connecting post (5). One end of the spring (62) is connected to the limiting block (61) and the other end is connected to the top plate (1). The other end of the connecting post (5) extends into the first countersunk hole (3) at the bottom of the lowest cylinder (2). A limiting member (63) is sleeved on the end of the connecting post (5) away from the limiting block (61) and is threadedly connected to it.

7. A soil sampling device for shallowly covered areas of the Gobi Desert according to claim 1, characterized in that, A ring-shaped base (71) is horizontally positioned directly below the top plate (1). Two internally threaded tubes (72) are symmetrically and vertically positioned on the outer side of the top plate (1). The internally threaded tubes (72) are connected to the top plate (1). A screw (73) is threaded through the internally threaded tube (72) and connected to it. One end of the screw (73) is rotatably connected to the ring-shaped base (71). A first motor (74) is fixedly mounted on the ring-shaped base (71). The output shaft of the first motor (74) is fixedly connected to the screw (73).

8. A soil sampling device for shallowly covered areas of the Gobi Desert according to claim 7, characterized in that, An annular groove (81) is provided on the outer side of the top plate (1) and is coaxial with it. Two sliders (82) are embedded in the annular groove (81) and are slidably connected to it. A horizontal bar (83) is provided between the slider (82) and the internal threaded tube (72). One end of the horizontal bar (83) is fixedly connected to the slider (82) and the other end is fixedly connected to the internal threaded tube (72).

9. A soil sampling device for shallowly covered areas of the Gobi Desert according to claim 8, characterized in that, The bottom of the top plate (1) is horizontally fixed with an annular gear ring (91) and coaxial with it. The lower side of the crossbar (83) is horizontally fixed with a second motor (92). A third gear (93) is mounted on the output shaft of the second motor (92). The third gear (93) meshes with the annular gear ring (91).

Images