Sampling device and sampling method for soil improvement

Abstract

The invention discloses a sampling device and a sampling method for soil improvement, and belongs to the technical field of deep soil sampling. The sampling device for soil improvement comprises an auxiliary collection column casing and a main collection column casing which are arranged in a split mode and are convenient for taking out soil samples; drilling serrated knives for cutting soil are arranged at the middle positions of the bottom surfaces of the auxiliary collection column casing and the main collection column casing, and a cylindrical top tray main body is fixedly connected to the top position of the main collection column casing. The auxiliary collection column casing and the main collection column casing are arranged in a split mode, samples can be taken after the auxiliary collection column casing and the main collection column casing are separated, the problem that the samples are inconvenient to take out when a traditional integrated cylinder is used for sampling can be avoided, the cylindrical samples are more complete and cannot be polluted by different layers of samples, and the quality of the samples is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of deep soil sampling, and particularly relates to a sampling device and a sampling method for soil improvement. Background Art

[0002] During the use of land, situations such as a decline in soil fertility, disruption of the soil pH balance, or soil pollution may occur. After these situations occur, it is necessary to promptly and effectively improve and restore the soil. The specific improvement and restoration of the soil include: sampling and testing the soil to understand the information data of the damaged soil, and then formulating methods to improve the soil properties through physical, chemical, or biological methods based on the test data, so as to improve its fertility, structure, and water retention capacity, and achieve the purpose of promoting plant growth.

[0003] In the prior art, for the preliminary step of soil improvement, that is, soil sample sampling, the method mostly used is to sample by punching holes with a Luoyang shovel. The soil samples obtained by this sampling method are relatively rough, and it is impossible to take a complete sample of a deeper soil layer at one time. It is necessary to sample in multiple layers and multiple times, with low efficiency, and the deep soil is easily contaminated by the shallow soil. Another sampling method is to sample by the cylinder sampling method. This sampling method is suitable for soils with higher humidity. When the soil is relatively dry, it is difficult to lift the sample together with the cylinder. Even after the soil sample is lifted, the sample adheres to the inner wall of the cylinder, and it is difficult to completely take out the soil column from the cylinder. The shape of the sample is not beautiful, and there may be mutual contamination between different layers of soil when the sample is taken out, affecting the test results. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a stainless steel strip production arc correction device.

[0005] The technical solution adopted to solve the above technical problem is: A sampling device for soil improvement includes a sub-collection cylinder and a main collection cylinder that are detachably arranged for convenient extraction of soil samples. Drilling saw blades for cutting soil are provided at the middle positions of the bottoms of the sub-collection cylinder and the main collection cylinder, and a cylindrical top tray body is fixedly connected to the top position of the main collection cylinder.

[0006] Through the above technical solution, the sub-collection cylinder and the main collection cylinder are detachably arranged, and the samples can be taken after they are separated, which can avoid the problem of inconvenient sample extraction in the traditional integrated cylinder sampling, and make the cylindrical samples more complete without being contaminated by samples from different layers, resulting in higher sample quality. The top tray body can seal the tops of the sub-collection cylinder and the main collection cylinder.

[0007] On one side of the upper surface of the top tray body close to the secondary collection cylinder, a lateral locking control structure for laterally positioning the secondary collection cylinder is provided, and on the side of the upper surface of the top tray body far from the lateral locking control structure, a truncation control mechanism for controlling the drilling sawtooth knife at the corresponding position is provided.

[0008] Through the above technical solution, the lateral locking control structure can relatively fix and position the secondary collection cylinder and the main collection cylinder laterally, and realize the vertical positioning of the secondary collection cylinder and the main collection cylinder through the vertical positioning protrusion and the vertical positioning groove, so that the secondary collection cylinder and the main collection cylinder are integrated into one body, and soil samples can be stored. The truncation control mechanism can truncate the soil samples from the outside soil, making the collected soil column more complete, and the drilling sawtooth knife at the corresponding position is inclined to prevent the soil samples collected in the secondary collection cylinder and the main collection cylinder from sliding down under the action of gravity.

[0009] Furthermore, the drilling sawtooth knife is arranged in an arc shape, and the side far from the secondary collection cylinder and the main collection cylinder is serrated, and the outer wall of the drilling sawtooth knife and the outer wall far from the secondary collection cylinder and the main collection cylinder are both polished.

[0010] Through the above technical solution, the drilling sawtooth knife is arranged in an arc shape, and the bottom of the drilling sawtooth knife is serrated, which is convenient for drilling the secondary collection cylinder and the main collection cylinder into the soil, and the outer walls of the secondary collection cylinder and the main collection cylinder are polished so that the outer soil will not adhere to the secondary collection cylinder and the main collection cylinder, which is convenient for pulling out the equipment.

[0011] Furthermore, a hinge fixed installation groove is opened in the middle of the lower part of the inner wall of the main collection cylinder. A truncation control hinge for rotational connection is fixedly connected between the upper surface of the drilling sawtooth knife below the main collection cylinder and the top wall of the hinge fixed installation groove, and the truncation control hinge is a spring hinge. The drilling sawtooth knife at the position below the secondary collection cylinder is fixedly connected to the bottom of the secondary collection cylinder.

[0012] Through the above technical solution, the hinge fixed installation groove makes it convenient to install the truncation control hinge, so that the drilling sawtooth knife at the corresponding position can be tilted and folded to separate the sample from the soil at the bottom, and hold the sample to prevent the soil sample from sliding when pulling out the equipment. The spring hinge makes the drilling sawtooth knife automatically reset after the control wire is released.

[0013] Furthermore, the truncation control mechanism includes a pull wire steel wire protection cylinder fixedly connected to the middle of the inner wall of the main collection cylinder and a positioning control cylinder fixed on the surface of the top tray body. A control wire is slidably connected to the inner wall of the pull wire steel wire protection cylinder. The bottom of the control wire is fixedly connected to the inner wall of the drilling sawtooth knife below the main collection cylinder, and the top of the control wire is slidably connected through the top tray body.

[0014] Through the above technical solution, when the control wire is pulled upward, the drilling serrated knife at the corresponding position is folded and tilted, realizing the control of the drilling serrated knife.

[0015] Furthermore, two symmetrically arranged limit sliding protrusions are fixedly connected to the inner wall of the positioning control cylinder. The surface of the limit sliding protrusion is arc-shaped. A pulling plate is slidably connected up and down at the inner wall position of the positioning control cylinder. A fixed mounting hole is penetrated and opened on the surface of the pulling plate. The control wire is fixedly connected to the fixed mounting hole at the corresponding position. A pulling control lead screw is penetrated and engaged on one side of the surface of the pulling plate. The pulling control lead screw is rotatably connected to the surface of the top tray main body.

[0016] Through the above technical solution, the limit sliding protrusion can limit the pulling plate, enabling the pulling plate to move up and down. The control wire can be fixedly installed at the position of the pulling plate through the mounting hole. The pulling control lead screw can transmit power, enabling the pulling plate to obtain power and move up and down. Moreover, the pulling control lead screw can be adjusted through the secondary control grip.

[0017] Furthermore, a lead screw nut is fixedly penetrated on the surface of the pulling plate, and the pulling plate is connected to the pulling control lead screw through the lead screw nut. The top of the pulling control lead screw is rotatably penetrated through the top of the positioning control cylinder. A secondary control grip is fixedly connected to the top position of the pulling control lead screw.

[0018] Furthermore, a main control grip for controlling the main acquisition cylinder is fixedly connected to the middle of the upper surface of the top tray main body.

[0019] Through the above technical solution, the main control grip facilitates carrying the device and can also control the device.

[0020] Furthermore, the lateral locking control structure includes a plurality of lateral positioning grooves opened on the surface of the secondary acquisition cylinder. An elastic control pulling groove is opened on the lower surface of the top tray main body directly above the lateral positioning grooves. A lateral positioning column is slidably connected to the inner wall of the elastic control pulling groove, and the lateral positioning column is slidably connected to the inner wall of the corresponding lateral positioning groove. A linkage sliding column is fixedly connected to the central position of the surface of the lateral positioning column, and the linkage sliding column is slidably penetrated through the surface of the top tray main body.

[0021] Through the above technical solution, the lateral positioning groove and the lateral positioning column are engaged, thereby realizing the relative lateral fixation of the secondary acquisition cylinder and the main acquisition cylinder.

[0022] Furthermore, an arc-shaped linkage trigger rod is fixedly connected between the tops of the linkage sliding columns, and the arc-shaped linkage trigger rod is arranged in an arc shape. A pulling trigger button is fixedly connected to the surface of the arc-shaped linkage trigger rod. A pressing return spring is fixedly connected between the upper surface of the horizontal positioning column and the inner top wall of the elastic control groove. The pressing return spring is a compression spring.

[0023] Through the above technical solution, the linkage sliding column and the arc-shaped linkage trigger rod are fixed, so that the horizontal positioning column can be uniformly controlled by pulling the trigger button. The setting of the compression spring enables the pulling trigger button to automatically reset after being released.

[0024] Furthermore, a plurality of uniformly distributed vertical positioning protrusions are fixedly connected to both sides of the main collection cylinder from top to bottom at equal intervals. Vertical positioning grooves are formed in both sides of the secondary collection cylinder from top to bottom. The vertical positioning protrusions are slidably connected to the inner walls of the corresponding vertical positioning grooves.

[0025] A sampling method of a sampling device for soil improvement includes the following specific steps: Step 1. Select the target sampling area and mark it. Place the main collection cylinder and the secondary collection cylinder above the marked point. Hold the main control grip and press down the main collection cylinder and the secondary collection cylinder so that the main collection cylinder and the secondary collection cylinder are inserted into the soil. Observe the insertion depth on the outer wall of the main collection cylinder. Stop pressing when the target depth is reached. Step 2. Rotate the secondary control grip so that the control wire is pulled, so that the corresponding drilling serrated cutter has an inclined force. During this process, the main control grip needs to be rotated and the main control grip needs to be continuously pressed so that the outer soil is fully separated from the outer walls of the main collection cylinder and the secondary collection cylinder. Step 3. Pull up the main control grip to pull out the sample together with the main collection cylinder and the secondary collection cylinder. Then separate the main collection cylinder and the secondary collection cylinder, and the soil sample can be taken out from the main collection cylinder and the secondary collection cylinder.

[0026] The beneficial effects of the present invention are as follows: (1) By designing the secondary collection cylinder and the main collection cylinder separately and assisting in fixing them through the horizontal locking control structure, vertical positioning protrusions and vertical positioning grooves, the secondary collection cylinder and the main collection cylinder are separated. The sample can be taken after separating them, which can avoid the problem that it is inconvenient to take out the sample with a traditional integrated cylindrical sampling method, and make the cylindrical sample more complete without being contaminated by samples from different layers, resulting in higher sample quality; (2) The present invention controls the folding drilling serrated cutter through the truncation control mechanism. By manually controlling the control wire, the control wire pulls the drilling serrated cutter. When the drilling serrated cutter is inclined, the sampled soil can be separated from the land below, and the inclined drilling serrated cutter can hold the sample to prevent the sample from sliding down under the action of gravity, ensuring the integrity of the sample. Brief Description of the Drawings

[0027] Figure 1 is the first perspective structure diagram of a sampling device for soil improvement according to the present invention; Figure 2 is the second perspective structure diagram of a sampling device for soil improvement according to the present invention; Figure 3 is the present invention Figure 1 The enlarged view of part A in; Figure 4 is the present invention Figure 2 The enlarged view of part B in; Figure 5 is the partial structure diagram of the main collection cylinder of a sampling device for soil improvement according to the present invention; Figure 6 is the present invention Figure 5 The partial sectional view of part C in; Figure 7 is the sectional view of the truncation control mechanism of a sampling device for soil improvement according to the present invention; Figure 8 is the partial structure diagram of the secondary collection cylinder of a sampling device for soil improvement according to the present invention.

[0028] Reference Numerals: 1, secondary collection cylinder; 2, main collection cylinder; 3, drilling serrated knife; 4, truncation control mechanism; 40, positioning control cylinder; 41, secondary control grip; 42, pulling control lead screw; 43, pulling plate; 44, fixed mounting hole; 45, limiting sliding protrusion; 5, top tray body; 6, horizontal locking control structure; 60, pulling trigger button; 61, arc linkage trigger rod; 62, elastic control groove; 63, horizontal positioning post; 64, pressing return spring; 65, linkage sliding column; 7, hinge fixed mounting groove; 8, main control grip; 9, pull rope wire protection cylinder; 10, control wire; 11, truncation control hinge; 12, vertical positioning protrusion; 13, vertical positioning groove; 14, horizontal positioning groove. Detailed Description of the Invention

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] As Figures 1-8As shown in the figure, a sampling device for soil improvement in this embodiment includes a sub-collection cylinder 1 and a main collection cylinder 2 which are separately arranged for convenient extraction of soil samples. Drilling sawtooth knives 3 for cutting soil are arranged at the middle positions of the bottoms of the sub-collection cylinder 1 and the main collection cylinder 2. A cylindrical top tray body 5 is fixedly connected to the top position of the main collection cylinder 2. The sub-collection cylinder 1 and the main collection cylinder 2 are separately arranged. After they are separated, the samples can be taken, which can avoid the problem that it is inconvenient to take out samples with traditional integrated cylindrical sampling, and make the cylindrical samples more complete without being contaminated by samples of different layers, resulting in higher sample quality. The top tray body 5 can seal the tops of the sub-collection cylinder 1 and the main collection cylinder 2.

[0031] The drilling sawtooth knife 3 is arc-shaped, and the side away from the sub-collection cylinder 1 and the main collection cylinder 2 is serrated. The outer wall of the drilling sawtooth knife 3 and the outer walls away from the sub-collection cylinder 1 and the main collection cylinder 2 are both polished. The drilling sawtooth knife 3 is arc-shaped, and the bottom of the drilling sawtooth knife 3 is serrated, which is convenient for drilling the sub-collection cylinder 1 and the main collection cylinder 2 into the soil. The polished outer walls of the sub-collection cylinder 1 and the main collection cylinder 2 prevent the outer soil from adhering to the sub-collection cylinder 1 and the main collection cylinder 2, facilitating the extraction of the equipment.

[0032] On the upper surface of the top tray body 5, a lateral locking control structure 6 for laterally positioning the sub-collection cylinder 1 is arranged on the side close to the sub-collection cylinder 1. A truncation control mechanism 4 for controlling the drilling sawtooth knife 3 at the corresponding position is arranged on the side of the upper surface of the top tray body 5 away from the lateral locking control structure 6. The lateral locking control structure 6 can relatively fix and position the sub-collection cylinder 1 and the main collection cylinder 2 laterally, and realize the vertical positioning of the sub-collection cylinder 1 and the main collection cylinder 2 through a vertical positioning protrusion 12 and a vertical positioning groove 13, so that the sub-collection cylinder 1 and the main collection cylinder 2 are combined into one body to store soil samples. The truncation control mechanism 4 can truncate the soil sample from the outside soil, making the collected soil column more complete, and the drilling sawtooth knife 3 at the corresponding position is inclined to prevent the soil samples collected in the sub-collection cylinder 1 and the main collection cylinder 2 from sliding down under the action of gravity.

[0033] The lateral locking control structure 6 includes a plurality of lateral positioning grooves 14 opened on the surface of the sub-collection cylinder 1. Elastic control pull grooves 62 are opened on the lower surface of the top tray body 5 directly above the lateral positioning grooves 14. A lateral positioning column 63 is slidably connected to the inner wall of the elastic control pull groove 62, and the lateral positioning column 63 is slidably connected to the inner wall of the corresponding lateral positioning groove 14. A linkage sliding column 65 is fixedly connected to the central position of the surface of the lateral positioning column 63, and the linkage sliding column 65 penetrates and slides on the surface of the top tray body 5. The lateral positioning groove 14 is engaged with the lateral positioning column 63 to relatively fix the sub-collection cylinder 1 and the main collection cylinder 2 laterally.

[0034] A circular arc-shaped linkage trigger rod 61 is fixedly connected between the tops of the linkage sliding columns 65. A pulling trigger button 60 is fixedly connected to the surface of the arc-shaped linkage trigger rod 61. A pressing reset spring 64 is fixedly connected between the upper surface of the horizontal positioning column 63 and the inner top wall of the elastic control groove 62. The pressing reset spring 64 is a compression spring, which fixes the linkage sliding column 65 and the arc-shaped linkage trigger rod 61, so that the horizontal positioning column 63 can be uniformly controlled by pulling the trigger button 60. The setting of the compression spring enables the pulling trigger button 60 to automatically reset after being released.

[0035] A number of uniformly distributed vertical positioning protrusions 12 are fixedly connected to both sides of the main collection cylinder 2 from top to bottom. Vertical positioning grooves 13 are formed in both sides of the secondary collection cylinder 1 from top to bottom. The vertical positioning protrusions 12 are slidably connected to the inner walls of the corresponding vertical positioning grooves 13.

[0036] The truncation control mechanism 4 includes a pull wire steel wire protection cylinder 9 fixedly connected to the middle of the inner wall of the main collection cylinder 2 and a positioning control cylinder 40 fixed to the surface of the top tray body 5. A control wire 10 is slidably connected to the inner wall of the pull wire steel wire protection cylinder 9. The bottom of the control wire 10 is fixedly connected to the inner wall of the drilling sawtooth knife 3 below the main collection cylinder 2. The top of the control wire 10 is slidably connected through the top tray body 5. When the control wire 10 is pulled upward, the drilling sawtooth knife 3 at the corresponding position is folded and tilted, realizing the control of the drilling sawtooth knife 3.

[0037] Two symmetrically arranged limit sliding protrusions 45 are fixedly connected to the inner wall of the positioning control cylinder 40. The surface of the limit sliding protrusion 45 is circular arc-shaped. A pulling plate 43 is slidably connected up and down at the inner wall position of the positioning control cylinder 40. A fixed mounting hole 44 is formed through the surface of the pulling plate 43. The control wire 10 is fixedly connected to the corresponding fixed mounting hole 44. A pulling control lead screw 42 is meshed through one side of the surface of the pulling plate 43. The pulling control lead screw 42 is rotatably connected to the surface of the top tray body 5. The limit sliding protrusion 45 can limit the pulling plate 43, enabling the pulling plate 43 to move up and down. The control wire 10 can be fixedly installed at the position of the pulling plate 43 through the mounting hole. The pulling control lead screw 42 can transmit power, enabling the pulling plate 43 to obtain power and move up and down, and the pulling control lead screw 42 can be adjusted through the secondary control grip 41.

[0038] A lead screw nut is fixedly penetrated through the surface of the pulling plate 43, and the pulling plate 43 is connected to the pulling control lead screw 42 through the lead screw nut. The top of the pulling control lead screw 42 is rotatably connected through the top of the positioning control cylinder 40. A secondary control grip 41 is fixedly connected to the top position of the pulling control lead screw 42.

[0039] In the middle of the lower part of the inner wall of the main collection cylinder 2, a hinge fixed installation groove 7 is provided. A truncation control hinge 11 for rotational connection is fixedly connected between the upper surface of the drilling serrated knife 3 located below the main collection cylinder 2 and the inner top wall of the hinge fixed installation groove 7. The truncation control hinge 11 is a spring hinge. The drilling serrated knife 3 located below the secondary collection cylinder 1 is fixedly connected to the bottom of the secondary collection cylinder 1. The hinge fixed installation groove 7 facilitates the installation of the truncation control hinge 11, enabling the drilling serrated knife 3 at the corresponding position to be tilted and folded, separating the sample from the soil at the bottom and holding the sample to prevent the soil sample from slipping when the device is pulled out. The spring hinge enables the drilling serrated knife 3 to automatically reset after the control wire 10 is released.

[0040] In the middle of the upper surface of the top tray body 5, a main control grip 8 for controlling the main collection cylinder 2 is fixedly connected. The main control grip 8 facilitates carrying the device and controlling the device.

[0041] A sampling method for a sampling device for soil improvement includes the following specific steps: Step 1. Select the target sampling area and mark it. Place the main collection cylinder 2 and the secondary collection cylinder 1 above the marked point. Hold the main control grip 8 and press down the main collection cylinder 2 and the secondary collection cylinder 1 so that the main collection cylinder 2 and the secondary collection cylinder 1 are inserted into the soil. Observe the insertion depth on the outer wall of the main collection cylinder 2 and stop pressing when the target depth is reached. Step 2. Rotate the secondary control grip 41 to pull the control wire 10, applying an inclined force to the drilling serrated knife 3 at the corresponding position. During this process, rotate the main control grip 8 and continue to press the main control grip 8 to fully separate the outer soil from the outer walls of the main collection cylinder 2 and the secondary collection cylinder 1. Step 3. Pull up the main control grip 8 to pull out the sample together with the main collection cylinder 2 and the secondary collection cylinder 1. Then separate the main collection cylinder 2 and the secondary collection cylinder 1 to take out the soil sample from the main collection cylinder 2 and the secondary collection cylinder 1.

[0042] The working principle of this embodiment is as follows. The method for the main collection cylinder 2 and the secondary collection cylinder 1 to cooperate and fix is: Control the pulling of the trigger button 60 so that the arc-shaped linkage trigger rod 61 drives the corresponding linkage slide column 65 and the horizontal positioning column 63 to slide. When the horizontal positioning column 63 slides into the elastic control pull groove 62, the secondary collection cylinder 1 can be pulled, separating the main collection cylinder 2 and the secondary collection cylinder 1. Conversely, insert the vertical positioning protrusion 12 into the corresponding vertical positioning groove 13, release the trigger button 60, and under the action of the pressing return spring 64, the horizontal positioning column 63 re-inserts into the corresponding horizontal positioning groove 14 to complete the relative fixation of the main collection cylinder 2 and the secondary collection cylinder 1.

[0043] By manipulating the grip rod 41 through a revolute pair, the pulling control lead screw 42 is rotated, causing the pulling plate 43 to slide upward, thereby pulling the control wire 10 upward, causing the drilling serrated knife 3 at the corresponding position to fold and tilt, and separating the sampled soil column from the land at the lower position.

[0044] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A sampling device for soil improvement, characterized in that: It comprises a split auxiliary collection column (1) and a main collection column (2) for conveniently taking out soil samples, wherein the auxiliary collection column (1) and the main collection column (2) are both provided with a drilling sawtooth knife (3) for cutting soil at the middle position of the bottom surface, and the main collection column (2) is fixedly connected with a cylindrical top tray body (5) at the top position; A lateral locking control structure (6) for lateral positioning of the auxiliary collecting cylinder (1) is provided on the side of the upper surface of the top tray body (5) close to the auxiliary collecting cylinder (1), and a cutting control mechanism (4) for controlling the sawtooth knife (3) to drill into a corresponding position is provided on the side of the upper surface of the top tray body (5) away from the lateral locking control structure (6).

2. A sampling device for soil improvement according to claim 1, characterized in that: The drilling serrated blade (3) is arranged in an arc shape, and the side away from the auxiliary collection column (1) and the main collection column (2) is arranged in a serrated shape. The outer wall of the drilling serrated blade (3) and the outer wall away from the auxiliary collection column (1) and the main collection column (2) are polished.

3. A sampling device for soil improvement according to claim 1, characterized in that: A hinge fixing installation groove (7) is provided at the middle position of the lower inner wall of the main collection column (2); a cut-off control hinge (11) for rotational connection is fixedly connected between the upper surface of the drilling serrated knife (3) located below the main collection column (2) and the inner top wall of the hinge fixing installation groove (7); and the cut-off control hinge (11) is a spring hinge; the drilling serrated knife (3) located below the auxiliary collection column (1) is fixedly connected to the bottom of the auxiliary collection column (1).

4. A sampling device for soil improvement according to claim 1, characterized in that: The cut-off control mechanism (4) comprises a drawstring wire protection cylinder (9) fixedly connected to the middle of the inner wall of the main collection column (2) and a positioning control cylinder (40) fixed to the surface of the top tray body (5), the inner wall of the drawstring wire protection cylinder (9) is slidably connected with a control wire (10), the bottom of the control wire (10) is fixedly connected to the inner wall of the drilling sawtooth knife (3) below the main collection column (2), and the top of the control wire (10) is slidably connected to the top tray body (5).

5. A sampling device for soil improvement according to claim 4, characterized in that: The inner wall of the positioning control cylinder (40) is fixedly connected with two symmetrically arranged limit sliding protrusions (45), the surface of the limit sliding protrusion (45) is arranged in an arc shape, the inner wall of the positioning control cylinder (40) is slidably connected with a pulling plate (43) up and down, the surface of the pulling plate (43) is penetrated with a fixed installation hole (44), the control wire (10) is fixedly connected with the fixed installation hole (44) at the corresponding position, and a pulling control lead screw (42) is penetrated and meshed with one side of the surface of the pulling plate (43), and the pulling control lead screw (42) is rotatably connected to the surface of the top tray body (5).

6. A sampling device for soil improvement according to claim 5, characterized in that: A lead screw nut is fixedly passed through the surface of the pulling plate (43), and the pulling plate (43) is connected to the pulling control lead screw (42) via the lead screw nut. The top of the pulling control lead screw (42) is rotationally connected to the top of the positioning control cylinder (40), and the top of the pulling control lead screw (42) is fixedly connected to a secondary control handle (41).

7. A sampling device for soil improvement according to claim 1, characterized in that: A main control handle (8) for controlling the main collection column (2) is fixedly connected to the middle of the upper surface of the top tray body (5).

8. A sampling device for soil improvement according to claim 1, characterized in that: The transverse locking control structure (6) comprises a plurality of transverse positioning grooves (14) formed on the surface of the auxiliary collecting column (1); an elastic control groove (62) is formed on the lower surface of the top tray body (5) directly above the transverse positioning groove (14); a transverse positioning column (63) is slidably connected to the inner wall of the elastic control groove (62); the transverse positioning column (63) is slidably connected to the inner wall of the transverse positioning groove (14) at a corresponding position; a linkage sliding column (65) is fixedly connected to the center position of the surface of the transverse positioning column (63); and the linkage sliding column (65) is slidably connected to the surface of the top tray body (5).

9. A sampling device for soil improvement according to claim 8, characterized in that: An arc-shaped linkage trigger rod (61) is fixedly connected between the top of the linkage sliding column (65), a pull trigger button (60) is fixedly connected to the surface of the arc-shaped linkage trigger rod (61), and a pressing return spring (64) is fixedly connected between the upper surface of the transverse positioning column (63) and the inner top wall of the elastic control groove (62), and the pressing return spring (64) is a compression spring; A plurality of evenly distributed vertical positioning protrusions (12) are evenly fixedly connected from top to bottom on both sides of the main collection column (2), and vertical positioning grooves (13) are opened from top to bottom on both sides of the auxiliary collection column (1), and the vertical positioning protrusions (12) are slidably connected to the inner walls of the vertical positioning grooves (13) at corresponding positions.

10. A sampling method for a sampling device for soil improvement according to any one of claims 1 to 9, characterized in that: The specific steps include: Step 1. Select the sampling target site and mark it, place the main collection cylinder (2) and the auxiliary collection cylinder (1) above the mark, hold the main control handle (8), and press the main collection cylinder (2) and the auxiliary collection cylinder (1) downward to insert the main collection cylinder (2) and the auxiliary collection cylinder (1) into the soil, and observe the insertion depth on the outer wall of the main collection cylinder (2). Stop pressing when the target depth is reached; Step 2. Rotate the auxiliary control handle (41) so that the control wire (10) is pulled, so that the drilling serrated knife (3) at the corresponding position has a tilting force, and in this process, it is necessary to rotate the main control handle (8) and continue to press the main control handle (8) so that the outer soil is fully separated from the outer wall of the main collection column (2) and the auxiliary collection column (1); Step 3. Pulling the main control handle (8) upwards can pull out the sample together with the main collection column (2) and the auxiliary collection column (1), and then separate the main collection column (2) and the auxiliary collection column (1), so that the soil sample can be taken out from the main collection column (2) and the auxiliary collection column (1).

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