A soil sampling method for land protection

Abstract

The present invention relates to the field of land protection technology, and in particular to a soil sampling method for land protection, comprising a base and a circular plate fixed to the base, a circular hole is opened at the bottom of the circular plate, a guide rod is fixed to the inner side of the circular plate, a lifting frame is slidably mounted on the guide rod, a fixed plate is connected to the lifting frame through damping rotation, a semicircular plate is rotatably connected to the fixed plate, and a sampling drill is installed on the outer side of the semicircular plate through bolt connection. The present invention moves the sampling drill downward to drill into the soil, so that the soil enters the annular plate and is collected, and then checks the scale of the scale to determine the soil that needs to be sampled, and pushes the iron block corresponding to the sampling depth range to move downward. The iron block moves downward and contacts with the adjacent magnetic block magnetically, and the annular plate corresponding to the sampling depth range is connected, and the connected annular plate can be pulled down, and the soil of different depths can be accurately obtained at one time, so that there is no need to change the sampling position, and the operation is convenient, thereby improving the sampling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of land protection, and in particular to a soil sampling method for land protection. Background Art

[0002] In land protection, in order to better understand the condition of the land, it is necessary to take soil samples, and then take appropriate measures to remediate and protect the land based on the results of the soil sample tests to improve land quality and maintain ecological balance.

[0003] A Chinese patent with publication number CN116026634A discloses a portable contaminated soil sampling method for environmental engineering, including a vehicle body and supporting legs. An automatic sampling device is arranged on the upper surface of the vehicle body, and the automatic sampling device includes a lifting mechanism and a sampling mechanism. The bottom of the outer surfaces of the four supporting legs are respectively provided with mobile fixing devices, and the mobile fixing devices include a fixing mechanism and a moving mechanism. Although the above patent can sample soil, due to the shape of the sampling chamber of the sampling drill bit, it is impossible to accurately obtain soil at different depths. In order to sample soil at different depths, it is necessary to frequently change the position for sampling, which is troublesome and affects the sampling efficiency.

[0004] The present invention aims to solve the problems existing in the above patents. To this end, a soil sampling method for land protection is proposed, which can accurately obtain soil of different depths at one time without changing the sampling position, is easy to operate, and improves the sampling efficiency. Summary of the invention

[0005] In order to overcome the shortcomings that although the above patent can sample soil, due to the shape of the sampling chamber of the sampling drill bit, soil at different depths cannot be accurately obtained, and in order to sample soil at different depths, it is necessary to frequently change the sampling position, which is troublesome and affects the sampling efficiency, the present invention provides a soil sampling method for land protection that can accurately obtain soil at different depths at one time, does not need to change the sampling position, is easy to operate, and improves the sampling efficiency.

[0006] The present invention is achieved through the following technical solutions:

[0007] A soil sampling method for land protection includes a base and a return plate fixed to the base, a circular hole is opened at the bottom of the return plate, a guide rod is fixed to the inner side of the return plate, a lifting frame is slidably mounted on the guide rod, a fixed plate is connected to the lifting frame through damping rotation, a semicircular plate is rotatably penetrated on the fixed plate, a sampling drill bit is installed on the outer side of the semicircular plate through bolt connection, a limiting frame is fixedly connected to the inner side of the return plate at uniform intervals to limit the lifting frame, a driving motor is installed on the fixed plate, the output shaft of the driving motor and the semicircular plate are driven by a synchronous belt assembly, an electric screw threadedly connected to the lifting frame is installed on the return plate, and a scale, an annular plate, a magnetic block, an iron Block, clamping assembly and supporting assembly, the supporting assembly is installed on the base and is used to support the base, annular plates are evenly spaced and clamped on the inner side of the semicircular plate, the annular plate and the semicircular plate are combined to form a complete circle, the outer side of the annular plate is symmetrically embedded and fixed with magnetic blocks, the outer side of the annular plate is connected with iron blocks through damping symmetrical sliding, the iron blocks correspond to the magnetic blocks on the adjacent annular plates, the sampling drill bit is used to move the soil into the annular plate to complete the sampling, and then the iron blocks corresponding to the required depth range are pushed downward according to the scale, the iron blocks are magnetically contacted with the magnetic blocks to connect the annular plates corresponding to the depth range, so that the connected annular plates can be removed to obtain the soil at the required depth.

[0008] Further explanation, the clamping assembly includes an air bag fixed to the inner side of the annular plate along the circumferential direction to clamp and fix the soil, the air bag is connected to an air inlet pipe, vertical pipes are symmetrically fixed to the inner side of the semicircular plate, the air outlet end of the vertical pipe is clamped with the air inlet end of the air inlet pipe, an air pump is installed on the fixed plate, the air outlet end of the air pump is connected to an air guide pipe, and the air outlet end of the air guide pipe passes through the semicircular plate and is connected and communicated with the vertical pipe.

[0009] Further explanation, the support assembly includes a swing plate rotatably connected to the four sides of the base, a fixed screw is fixed to the bottom of the swing plate, and a support rod is threadedly connected to the fixed screw to support the base, and a trigger assembly is arranged between the base and the swing plate to drive the swing plate to swing.

[0010] Further explanation: a rubber sleeve is provided on the fixing screw to increase the friction between the fixing screw and the hand.

[0011] To further explain, the trigger assembly includes a bracket that is vertically slidably connected to the base, the top end of the bracket is rotatably connected to a connecting rod, and the tail end of the connecting rod is rotatably connected to the swing plate.

[0012] Further explanation, the soil sampling method for land protection also includes a cleaning component, which includes a fixed ring fixed to the outer side of the circular plate, and an annular brush is rotatably connected to the fixed ring to remove soil attached to the sampling drill bit, and a flat orifice plate is fixed to the annular brush. A pushing component is arranged between the electric screw and the circular plate to drive the flat orifice plate to swing back and forth.

[0013] Further explanation, the pushing assembly includes a rotating shaft rotatably connected to the circular plate, a disc is fixedly connected to the bottom end of the rotating shaft, and an eccentric position of the disc is fixedly connected to a contact rod located on the inner side of the flat plate to drive the flat plate to swing back and forth, and the rotating shaft and the electric screw are connected by a gear transmission.

[0014] Further explanation, the soil sampling method for land protection also includes a fixed frame fixed to both sides of the circular plate, and a movable plate is connected to the fixed frame through damping rotation to place heavy objects.

[0015] The beneficial effects of the present invention are:

[0016] 1. Move the sampling drill bit downward into the soil, so that the soil enters the annular plate and is collected. Then, the soil at the required sampling depth is determined by checking the scale on the ruler, and the iron block corresponding to the sampling depth range is pushed downward. The iron block moves downward and comes into magnetic contact with the adjacent magnetic block, thus connecting the annular plate corresponding to the sampling depth range. The connected annular plate can be pulled down, and the soil at different depths can be accurately obtained at one time. There is no need to change the sampling position, and the operation is convenient, thereby improving the sampling efficiency.

[0017] 2. Under the action of the fixing screw and the support rod, when the device is placed on the ground, the fixing screw and the support rod can support and limit the base in a larger range, so that the base can be placed more stably.

[0018] 3. Under the action of the annular brush, every time the sampling drill bit completes sampling and moves upward to reset, the annular brush can remove the soil attached to the outer wall of the sampling drill bit, which can prevent the soil from adhering to the sampling drill bit and affecting subsequent use, thereby ensuring the subsequent use effect of the sampling drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the semicircular plate and the sampling drill bit after swinging of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the driving motor, scale and annular plate of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the magnetic block and the iron block of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping assembly of the present invention.

[0024] Figure 6It is a schematic diagram of the three-dimensional structure of the airbag and the air intake pipe of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the support assembly of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the fixed screw rod and the support rod after being unfolded in the present invention.

[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the cleaning component of the present invention.

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the straight hole plate and the contact rod of the present invention.

[0029] Fig.11 It is a three-dimensional structural schematic diagram of the fixed frame and the movable plate of the present invention.

[0030] Parts names and serial numbers in the figure: 1_base, 2_return plate, 3_guide rod, 4_lifting frame, 5_semicircular plate, 6_sampling drill bit, 7_limiting frame, 8_fixed plate, 9_electric screw, 10_driving motor, 11_scale, 111_annular plate, 112_magnetic block, 113_iron block, 12_air pump, 121_air guide pipe, 122_vertical pipe, 123_air bag, 124_intake pipe, 13_swinging plate, 131_fixed screw, 132_support rod, 133_connecting rod, 134_bracket, 135_rubber sleeve, 14_fixing ring, 141_annular brush, 142_slotted hole plate, 143_rotating shaft, 144_disc, 145_contact rod, 15_fixed frame, 16_movable plate. DETAILED DESCRIPTION

[0031] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0032] Example: A soil sampling method for land protection, see Figure 1-Figure 8As shown, it includes a base 1 and a return plate 2 fixed to the base 1, a circular hole is opened in the middle of the bottom of the return plate 2, a guide rod 3 is fixed to the right inner side of the return plate 2, a lifting frame 4 is slidably mounted on the guide rod 3, a fixed plate 8 is connected to the middle of the lifting frame 4 through damping rotation, a semicircular plate 5 is rotatably penetrated in the middle of the front side of the fixed plate 8, a sampling drill bit 6 is installed on the outer side of the semicircular plate 5 through bolt connection, four limit frames 7 are fixed to the inner side of the return plate 2 at even intervals, when the lifting frame 4 moves downward and contacts with the limit frames 7, the limit frames 7 can limit the lifting frame 4, a driving motor 10 is installed on the rear side of the fixed plate 8, the output shaft of the driving motor 10 and the upper part of the semicircular plate 5 are driven by a synchronous belt assembly, an electric screw 9 is installed on the left side of the return plate 2, and the electric screw 9 is threadedly connected to the left side of the lifting frame 4, and also includes a scale 11, an annular plate 111, a magnetic block 112, and an iron block 113 , a clamping assembly and a supporting assembly, wherein the supporting assembly is mounted on the base 1, and when the supporting assembly is in operation, the supporting assembly can support the base 1, and an annular plate 111 is evenly spaced and clamped on the inner side of the semicircular plate 5, and the annular plate 111 and the semicircular plate 5 are combined to form a complete circle, and a magnetic block 112 is symmetrically embedded and fixed on the upper part of the outer side surface of the annular plate 111, and an iron block 113 is connected to the lower part of the outer side surface of the annular plate 111 through damping and symmetrical sliding front and back, and the iron block 113 corresponds to the magnetic block 112 on the adjacent annular plate 111, and the sampling drill bit 6 is used to move the soil into the annular plate 111 to complete the sampling, and then the iron block 113 corresponding to the required depth range is pushed downward according to the scale 11, and the iron block 113 is magnetically contacted with the magnetic block 112 to connect the annular plate 111 corresponding to the depth range, so that the connected annular plate 111 is removed to obtain the soil of the required depth.

[0033] See also Figure 5 and Figure 6 As shown, the clamping assembly includes an air pump 12, an air guide tube 121, a vertical tube 122, an air bag 123 and an air inlet pipe 124. The air bag 123 is fixedly connected to the inner side of the annular plate 111 along the circumferential direction. When the air bag 123 expands, the air bag 123 can clamp and fix the soil. The front side of the air bag 123 is connected to two air inlet pipes 124. The vertical tube 122 is fixedly connected to the inner side of the semicircular plate 5 symmetrically at the front and back sides. The air outlet end of the vertical tube 122 is clamped with the air inlet end of the air inlet pipe 124. The air pump 12 is installed on the rear side of the top of the fixed plate 8. The air outlet end of the air pump 12 is connected to the air guide tube 121. The air outlet end of the air guide tube 121 passes through the semicircular plate 5 and is connected and communicated with the top ends of the vertical tubes 122 on the front and back sides.

[0034] See also Figure 7 and Figure 8As shown, the support assembly includes a swing plate 13, a fixed screw 131, a support rod 132, a trigger assembly and a rubber sleeve 135. The swing plates 13 are rotatably connected to the four sides of the base 1. The bottoms of the four swing plates 13 are fixedly connected with fixed screws 131. The fixed screws 131 are threadedly connected with support rods 132. When the support rods 132 are unfolded and contact the ground, the support rods 132 can support the base 1. A trigger assembly is arranged between the base 1 and the swing plate 13. When the trigger assembly is operated, the trigger assembly can drive the swing plate 13 to swing. The upper parts of the four fixed screws 131 are fixedly sleeved with rubber sleeves 135, and the rubber sleeves 135 can increase the friction between the fixed screws 131 and the hand; the trigger assembly includes a connecting rod 133 and a bracket 134. The bracket 134 is vertically slidably penetrated on the base 1. The four top ends of the bracket 134 are rotatably connected with the connecting rods 133, and the tail ends of the four connecting rods 133 are rotatably connected to the inner sides of the four swing plates 13 respectively.

[0035] First, the device is moved to the sampling position so that the sampling drill bit 6 corresponds to the sampling position, and then the device is placed downward on the ground. During the placement process, the base 1 moves downward to drive the bracket 134 and the swing plate 13 to move downward. The swing plate 13 drives the support rod 132 to move downward through the fixed screw 131. When the bracket 134 moves downward and contacts the ground, the bracket 134 stops moving downward, and the bracket 134 causes the connecting rod 133 to stop moving downward. As the swing plate 13 continues to move downward, the swing plate 13 drives the connecting rod 133 to swing downward. The connecting rod 133 swings downward to cause the swing plate 13 that moves downward to swing outward. The swing plate 13 drives the support rod 132 to swing outward through the fixed screw 131, and then the base 1 moves downward to the maximum position. When the hand is in the upright position, the base 1 stops moving downward, the base 1 stops driving the swing plate 13 to move downward, the swing plate 13 stops driving the support rod 132 to move downward through the fixed screw 131, and then the fixed screw 131 is held by the rubber sleeve 135. Due to the effect of the rubber sleeve 135, the friction with the hand can be increased, and the fixed screw 131 can be held more firmly. The support rod 132 is twisted to rotate and move toward the ground. When the support rod 132 moves and contacts the ground, the support rod 132 is stopped from twisting. The support rod 132 cooperates with the fixed screw 131 to support and limit the base 1 in a larger range, so that the base 1 can be placed more stably. Then the drive motor 10 is started, and the drive motor 10 drives the semicircular plate 5 to rotate through the synchronous belt assembly. The rotation of the semicircular plate 5 drives the sampling drill bit 6 to rotate, and then the electric screw 9 is started to rotate forward to drive the lifting frame 4 to move downward, and the lifting frame 4 drives the fixed plate 8 to move downward, and the fixed plate 8 moves downward and contacts with the limit frame 7, and the limit frame 7 limits the fixed plate 8 to prevent the fixed plate 8 from rotating and affecting the sampling of the soil, and the fixed plate 8 drives the semicircular plate 5 to move downward, and the semicircular plate 5 drives the sampling drill bit 6 to move downward, and the sampling drill bit 6 moves downward through the circular hole of the return plate 2 and drills into the soil, and the soil enters the annular plate 111 for sampling, and when the sampling drill bit 6 moves downward to the maximum stroke, the driving motor 10 is turned off, the semicircular plate 5 stops driving the sampling drill bit 6 to rotate, and then the air pump 12 is started, and the air pump 12 discharges air into the air guide pipe 121, and the air guide pipe 121 The air inside is discharged into the vertical pipe 122, and the air in the vertical pipe 122 is discharged into the air bag 123 through the air inlet pipe 124. With the discharge of air, the air bag 123 continues to expand and wraps and clamps the soil. Then, the electric screw 9 is started to reverse and drive the lifting frame 4 to move upward and reset. The lifting frame 4 drives the semicircular plate 5 to move upward and reset through the fixed plate 8. The semicircular plate 5 drives the sampling drill bit 6 and the annular plate 111 to move upward and reset. The annular plate 111 drives the soil to move upward. Since the soil is wrapped and clamped by the air bag 123, the soil is prevented from falling from the annular plate 111 during the upward movement and affecting the sampling, thereby ensuring the smooth sampling of the soil. The electric screw 9 is closed, and the sampling drill bit 6 is pulled forward to swing to a tilted state, and the bolt is twisted to loosen the sampling drill bit 6.The sampling drill bit 6 is removed from the semicircular plate 5, and the soil at the required sampling depth can be determined by checking the scale 11, and the iron block 113 corresponding to the sampling depth range is pushed downward. The iron block 113 moves downward and is in magnetic contact with the adjacent magnetic block 112, and the annular plate 111 corresponding to the sampling depth range is connected, and the connected annular plate 111 can be pulled and removed. The removal of the connected annular plate 111 also causes the soil at the required depth to be removed. The annular plate 111 also drives the air intake pipe 124 to move and disengage from the vertical pipe 122 through the air bag 123, and the air in the air bag 123 is discharged through the air intake pipe 124. As the air is discharged, the air bag 123 continuously contracts and resets to stop wrapping and clamping the soil, and then the soil in the annular plate 111 is pushed out for subsequent testing. According to the results of the soil testing, appropriate measures are taken to regulate and protect the land. After all the soil is pushed out, the connected annular plate 111 is put back into the semicircular plate 5 for clamping, and the annular plate 111 is The shaped plate 111 drives the air inlet pipe 124 to engage with the vertical pipe 122 through the air bag 123, and then pushes the iron block 113 in contact with the magnetic block 112 to move upward, and the iron block 113 is reset and disengaged from the magnetic block 112, and the remaining annular plate 111 can be removed to push out the remaining soil, and then the sampling drill bit 6 is put back on the semicircular plate 5 and fixed by bolts, and the sampling drill bit 6 is pushed to swing backward and reset, and then the support rod 132 is twisted to rotate in the opposite direction and retracted and reset through the thread movement, and the support rod 132 is disengaged from the ground, and then the device is picked up for carrying, and the device is picked up and drives the base 1 to move upward, and the upward movement of the base 1 drives the swinging plate 13 to move upward. Since the bracket 134 is in a stationary state, the connecting rod 133 drives the upwardly moving swinging plate 13 to swing inward and reset, and the swinging plate 13 drives the support rod 132 to swing inward and reset through the fixing screw 131, and then the base 1 continues to move upward and drives the bracket 134 to move upward and disengage from the ground. In this way, by adjusting the position of the annular plate 111, soil at different depths can be accurately obtained at one time, without changing the sampling position, and the operation is convenient, thereby improving the sampling efficiency.

[0036] See also Fig. 9 and Fig.10As shown, the soil sampling method for land protection also includes a cleaning component installed between the return plate 2 and the electric screw 9, the cleaning component includes a fixing ring 14, an annular brush 141, a straight hole plate 142 and a pushing component, the outer bottom of the return plate 2 is fixedly connected with a fixing ring 14, and the fixing ring 14 is rotatably connected with the annular brush 141. When the sampling drill bit 6 moves upward and resets, the annular brush 141 can remove the soil attached to the sampling drill bit 6. The left side of the annular brush 141 is fixedly connected with the straight hole plate 142. A pushing component is arranged between the electric screw 9 and the return plate 2. When When the pushing component is in operation, the pushing component can drive the straight hole plate 142 to swing back and forth; the pushing component includes a rotating shaft 143, a disc 144 and a contact rod 145. The rotating shaft 143 is rotatably connected to the left side of the outer bottom of the circular plate 2. The bottom end of the rotating shaft 143 is fixedly connected to the disc 144. The contact rod 145 is fixedly connected to the eccentric position of the bottom of the disc 144. The contact rod 145 is located on the inner side of the straight hole plate 142. When the contact rod 145 rotates, the contact rod 145 can drive the straight hole plate 142 to swing back and forth. The upper part of the rotating shaft 143 and the lower part of the electric screw 9 are connected by gear transmission.

[0037] When the electric screw 9 rotates forward, the semicircular plate 5 drives the sampling drill bit 6 to move downward, and the sampling drill bit 6 moves downward to contact the annular brush 141. At the same time, the electric screw 9 rotates forward through the gear transmission to drive the rotating shaft 143 to rotate, and the rotating shaft 143 drives the disc 144 to rotate, and the disc 144 drives the contact rod 145 to rotate. The rotation of the contact rod 145 drives the straight hole plate 142 to swing back and forth, and the straight hole plate 142 drives the annular brush 141 to rotate forward and reverse alternately. When the soil sampling is completed, the electric screw 9 is started to reverse, which makes the semicircular plate 5 drive the sampling drill bit 6 Move upward to reset, the electric screw 9 reverses and drives the rotating shaft 143 to reverse through the gear transmission, the rotating shaft 143 drives the contact rod 145 to reverse through the disc 144, the contact rod 145 drives the straight hole plate 142 to swing back and forth, the straight hole plate 142 drives the annular brush 141 to rotate forward and reverse alternately, the annular brush 141 rotates forward and reverse alternately to remove the soil attached to the outer wall of the sampling drill bit 6, when the sampling drill bit 6 is reset, the electric screw 9 is turned off, the contact rod 145 stops driving the straight hole plate 142 to swing back and forth, and the annular brush 141 stops rotating forward and reverse alternately. In this way, it can prevent the soil from adhering to the sampling drill bit 6 and affecting the subsequent use, thereby ensuring the subsequent use effect of the sampling drill bit 6.

[0038] See also Fig.11 As shown, the soil sampling method for land protection also includes a fixed frame 15 and a movable plate 16. The fixed frame 15 is fixedly connected to the lower part of the left and right sides of the circular plate 2. The lower part of the fixed frame 15 is connected to the movable plate 16 through damping rotation. When the movable plate 16 swings downward to a horizontal state, the movable plate 16 can be used to place heavy objects.

[0039] When the device is placed, the left and right movable plates 16 are pulled downward to be in a horizontal state, and then a heavy object is placed on the movable plates 16. The heavy object can make the base 1 more stable. When the device needs to be folded up for carrying, the heavy object is removed from the movable plates 16, and the movable plates 16 are pulled upward to be reset. In this way, the base 1 can be further stabilized, and the device as a whole can also be stabilized.

[0040] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A soil sampling method for land protection, using a soil sampling device for land protection, the soil sampling device comprising a base (1) and a return plate (2) fixed to the base (1), the return plate (2) having a circular hole at the bottom, a guide rod (3) fixed to the inner side of the return plate (2), a lifting frame (4) slidably mounted on the guide rod (3), a fixed plate (8) connected to the lifting frame (4) by damping rotation, a semicircular plate (5) rotatably penetrated on the fixed plate (8), a sampling drill bit (6) is installed on the outer side of the semicircular plate (5) by bolt connection, a limiting frame (7) fixedly connected to the inner side of the return plate (2) at uniform intervals to limit the lifting frame (4), a driving motor (10) is installed on the fixed plate (8), the output shaft of the driving motor (10) and the semicircular plate (5) are driven by a synchronous belt assembly, an electric screw (9) threadedly connected to the lifting frame (4) is installed on the return plate (2), characterized in that: The invention also comprises a scale (11), an annular plate (111), a magnetic block (112), an iron block (113), a clamping assembly, a supporting assembly and a triggering assembly. The supporting assembly is mounted on the base (1) and is used to support the base (1). The inner side of the semicircular plate (5) is evenly spaced and clamped with an annular plate (111). The annular plate (111) and the semicircular plate (5) are combined to form a complete circle. The outer side of the annular plate (111) is symmetrically embedded and fixed with a magnetic block (112). The outer side of the annular plate (111) is symmetrically slidably connected with an iron block (113). The iron block (113) corresponds to the magnetic block (112) on the adjacent annular plate (111). The sampling drill bit (6) is used to move soil into the annular plate (111) to complete sampling. The invention also comprises a cleaning assembly, which comprises a cleaning assembly fixed to the return plate ( 2) a fixing ring (14) on the outer side, the fixing ring (14) being rotatably connected to an annular brush (141) for removing soil attached to the sampling drill bit (6), a straight hole plate (142) being fixedly connected to the annular brush (141), a pushing assembly being arranged between the electric screw (9) and the return plate (2) for driving the straight hole plate (142) to swing back and forth, and the straight hole plate (142) driving the annular brush (141) to rotate alternately forward and reverse; the pushing assembly comprising a rotating shaft (143) rotatably connected to the return plate (2), a disc (144) being fixedly connected to the bottom end of the rotating shaft (143), a contact rod (145) located inside the straight hole plate (142) being fixedly connected at an eccentric position of the disc (144) for driving the straight hole plate (142) to swing back and forth, and the rotating shaft (143) and the electric screw (9) being connected via a gear transmission; The soil sampling method comprises the following steps: firstly, the soil sampling device is moved to the sampling position so that the sampling drill bit (6) is aligned with the sampling position, the driving motor (10) is started, the driving motor (10) drives the semicircular plate (5) to rotate through the synchronous belt assembly, the semicircular plate (5) rotates and drives the sampling drill bit (6) to rotate, then the electric screw (9) is started to rotate forward and drives the lifting frame (4) to move downward, the lifting frame (4) drives the fixed plate (8) to move downward, the fixed plate (8) moves downward and contacts with the limiting frame (7), the limiting frame (7) limits the fixed plate (8), the fixed plate (8) drives the semicircular plate (5) to move downward, the semicircular plate (5) drives the sampling drill bit (6) to move downward, the sampling drill bit (6) moves downward through the circular hole of the return plate (2) and drills into the soil, the soil enters the annular plate (111) for sampling, and when the sampling drill bit (6) moves downward to the maximum stroke, the driving motor (10) is turned off ... The circular plate (5) stops driving the sampling drill bit (6) to rotate; the electric screw (9) is started to reverse and drive the lifting frame (4) to move upward and reset; the lifting frame (4) drives the semicircular plate (5) to move upward and reset through the fixed plate (8); the semicircular plate (5) drives the sampling drill bit (6) and the annular plate (111) to move upward and reset; the annular plate (111) drives the soil to move upward; the electric screw (9) is turned off, and the sampling drill bit (6) is pulled forward to swing to an inclined state; the screw is twisted The sampling drill bit (6) is released by bolting, and the sampling drill bit (6) is removed from the semicircular plate (5); the soil of the required sampling depth is determined by checking the scale (11), and the iron block (113) corresponding to the sampling depth range is pushed downward, and the iron block (113) moves downward to magnetically contact with the adjacent magnetic block (112), and the annular plate (111) corresponding to the sampling depth range is connected, and the connected annular plate (111) is pulled and removed, and the soil of the required depth is removed; When the electric screw (9) rotates forward, the semicircular plate (5) drives the sampling drill bit (6) to move downward, and the sampling drill bit (6) moves downward to contact the annular brush (141). At the same time, the electric screw (9) rotates forward to drive the rotating shaft (143) to rotate through the gear transmission, and the rotating shaft (143) drives the disk (144) to rotate. The disk (144) drives the contact rod (145) to rotate. The rotation of the contact rod (145) drives the straight hole plate (142) to swing back and forth, and the straight hole plate (142) drives the annular brush (141) to rotate forward and reverse alternately. After the soil sampling is completed, the electric screw (9) is started to reverse, the semicircular plate (5) drives the sampling drill bit (6) to move upward and reset, the electric screw (9) reverses and drives the rotating shaft (143) to reverse through the gear transmission, the rotating shaft (143) drives the contact rod (145) to reverse through the disc (144), the contact rod (145) drives the slotted hole plate (142) to swing back and forth, the slotted hole plate (142) drives the annular brush (141) to rotate forward and reverse alternately, and the annular brush (141) rotates forward and reverse alternately to remove the soil attached to the outer wall of the sampling drill bit (6).

2. A soil sampling method for land protection according to claim 1, characterized in that: The clamping assembly comprises an air bag (123) fixedly connected to the inner side of the annular plate (111) along the circumferential direction so as to clamp and fix the soil; the air bag (123) is connected to an air inlet pipe (124); a vertical pipe (122) is symmetrically fixedly connected to the inner side of the semicircular plate (5); an air outlet end of the vertical pipe (122) is clamped with an air inlet end of the air inlet pipe (124); an air pump (12) is installed on the fixed plate (8); an air outlet end of the air pump (12) is connected to an air guide pipe (121); and an air outlet end of the air guide pipe (121) passes through the semicircular plate (5) and is connected and connected to the vertical pipe (122).

3. A soil sampling method for land protection as claimed in claim 2, characterized in that: The support assembly comprises a swing plate (13) rotatably connected to four sides of the base (1); a fixing screw (131) is fixedly connected to the bottom of the swing plate (13); a support rod (132) is threadedly connected to the fixing screw (131) to support the base (1); and a trigger assembly is provided between the base (1) and the swing plate (13) to drive the swing plate (13) to swing.

4. A soil sampling method for land protection as claimed in claim 3, characterized in that: A rubber sleeve (135) is fixedly mounted on the fixing screw rod (131) to increase the friction between the fixing screw rod (131) and the hand.

5. A soil sampling method for land protection as claimed in claim 3, characterized in that: The trigger assembly comprises a bracket (134) vertically slidably connected to the base (1); the top end of the bracket (134) is rotatably connected to a connecting rod (133); the rear end of the connecting rod (133) is rotatably connected to the swing plate (13).

6. A soil sampling method for land protection as claimed in claim 1, characterized in that: The soil sampling device further comprises a fixed frame (15) fixedly connected to both sides of the circular plate (2), and a movable plate (16) is connected to the fixed frame (15) through damping rotation to place heavy objects.

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