A sampling device and sampling method for soil improvement

Abstract

The present invention discloses a sampling device and a sampling method for soil improvement, belonging to the technical field of deep soil sampling. The sampling device for soil improvement includes a sub-collection cylinder and a main collection cylinder which are detachably arranged for facilitating the extraction of soil samples. Drilling saw blades for cutting the soil are provided at the middle positions of the bottom surfaces of the sub-collection cylinder and the main collection cylinder. A top tray body arranged in a cylindrical shape is fixedly connected to the top position of the main collection cylinder. By detachably arranging the sub-collection cylinder and the main collection cylinder, the present invention can separate them and then take samples, avoiding the problem that it is inconvenient to take out samples with traditional integral cylindrical sampling, and making the cylindrical samples more complete without being contaminated by samples from different layers, thus improving the sample quality.

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 improvement and restoration of the soil specifically include: sampling and inspecting 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 detection data, so as to improve its fertility, structure, and water retention capacity, and achieve the purpose of promoting plant growth.

[0003] In the prior steps of soil improvement in the prior art, that is, soil sample sampling, it mostly uses the method of using a Luoyang shovel to dig holes for sampling. 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 sampling by the cylinder sampling method. This sampling method is for soils with relatively high 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 which are detachably arranged for convenient extraction of soil samples. Drilling sawtooth knives for cutting soil are arranged 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 that it is inconvenient to take out samples with traditional integral cylinders, and makes the cylindrical samples more complete and not contaminated by samples of 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 near the secondary collection cylinder, there is a lateral locking control structure for laterally positioning the secondary collection cylinder. On the side of the upper surface of the top tray body away from the lateral locking control structure, there is a truncation control mechanism for controlling the drilling sawtooth knife at the corresponding position.

[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 can store soil samples. The truncation control mechanism can truncate the soil samples from the external 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 arc-shaped, and the side away from the secondary collection cylinder and the main collection cylinder is serrated. The outer wall of the drilling sawtooth knife and the outer walls away from the secondary collection cylinder and the main collection cylinder are both polished.

[0010] Through the above technical solution, the drilling sawtooth knife is arc-shaped 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 limiting sliding protrusions are fixedly connected to the inner wall of the positioning control cylinder. The surface of the limiting 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 body.

[0016] Through the above technical solution, the limiting 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, and 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 connected 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 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 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 connected through the surface of the top tray body.

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

[0022] Furthermore, an arc-shaped linkage trigger rod arranged in an arc shape is fixedly connected between the tops of the linkage sliding columns. 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 slot. The pressing return spring is a compression spring.

[0023] Through the above technical solution, the linkage sliding columns and the arc-shaped linkage trigger rod are fixed, so that the horizontal positioning columns 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 number of uniformly distributed vertical positioning protrusions are fixedly connected to both sides of the main collection cylinder from top to bottom. Vertical positioning grooves are formed on 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 for a sampling device for soil improvement includes the following specific steps:

[0026] 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 and stop pressing when the target depth is reached.

[0027] Step 2. Rotate the secondary control grip so that the control wire is pulled, applying an inclined force to the corresponding drilling serrated cutter. During this process, rotate the main control grip and continue to press the main control grip to fully separate the outer soil from the outer walls of the main collection cylinder and the secondary collection cylinder.

[0028] 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 to obtain the soil sample from the main collection cylinder and the secondary collection cylinder.

[0029] The beneficial effects of the present invention are as follows: (1) By designing the secondary sampling cylinder and the main sampling cylinder separately and using the lateral locking control structure, vertical positioning protrusions and vertical positioning grooves for auxiliary fixation, the secondary sampling cylinder and the main sampling cylinder are separated. After separating them, the sample can be taken, which can avoid the problem that it is inconvenient to take out the sample in the traditional integrated cylindrical sampling, and make the cylindrical sample more complete without being contaminated by samples in different layers, resulting in higher sample quality. (2) The present invention controls the folding and drilling sawtooth knife through the truncation control mechanism. By manually controlling the control wire, the control wire pulls the drilling sawtooth knife. When the drilling sawtooth knife is inclined, the sampled soil can be separated from the underlying land, and the inclined drilling sawtooth knife 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

[0030] Figure 1 is the first perspective structure diagram of a sampling device for soil improvement according to the present invention;

[0031] Figure 2 is the second perspective structure diagram of a sampling device for soil improvement according to the present invention;

[0032] Figure 3 is the present invention Figure 1 The enlarged view of part A in;

[0033] Figure 4 is the present invention Figure 2 The enlarged view of part B in;

[0034] Figure 5 is the partial structure diagram of the main sampling cylinder of a sampling device for soil improvement according to the present invention;

[0035] Figure 6 is the present invention Figure 5 The partial cross-sectional view of part C in;

[0036] Figure 7 is the cross-sectional view of the truncation control mechanism of a sampling device for soil improvement according to the present invention;

[0037] Figure 8 is the partial structure diagram of the secondary sampling cylinder of a sampling device for soil improvement according to the present invention.

[0038] 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 projection; 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 column; 64, pressing return spring; 65, linkage sliding column; 7, hinge fixed mounting groove; 8, main control grip; 9, cable wire protection cylinder; 10, control wire; 11, truncation control hinge; 12, vertical positioning projection; 13, vertical positioning groove; 14, horizontal positioning groove. Detailed implementation mode

[0039] 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 accompanying 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.

[0040] As Figures 1-8 shown, a sampling device for soil improvement in this embodiment includes a secondary collection cylinder 1 and a main collection cylinder 2 which are separately arranged for convenient extraction of soil samples. Drilling serrated knives 3 for cutting soil are provided at the middle positions of the bottom surfaces of the secondary 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 secondary collection cylinder 1 and the main collection cylinder 2 are separately arranged. After separating them, 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, making the sample quality higher. The top tray body 5 can seal the tops of the secondary collection cylinder 1 and the main collection cylinder 2.

[0041] The drilling serrated knife 3 is arc-shaped, and the side away from the secondary collection cylinder 1 and the main collection cylinder 2 is serrated. The outer wall of the drilling serrated knife 3 and the outer walls away from the secondary collection cylinder 1 and the main collection cylinder 2 are both polished. The drilling serrated knife 3 is arc-shaped, and the bottom of the drilling serrated knife 3 is serrated, which is convenient for drilling the secondary collection cylinder 1 and the main collection cylinder 2 into the soil. The polished outer walls of the secondary collection cylinder 1 and the main collection cylinder 2 prevent the outer soil from adhering to the secondary collection cylinder 1 and the main collection cylinder 2, facilitating the extraction of the device.

[0042] On one side of the upper surface of the top tray body 5 close to the secondary collection cylinder 1, there is a lateral locking control structure 6 for laterally positioning the secondary collection cylinder 1. On the side of the upper surface of the top tray body 5 far from the lateral locking control structure 6, there is a truncation control mechanism 4 for controlling the drilling sawtooth knife 3 at the corresponding position to drill. The lateral locking control structure 6 can relatively fix and position the secondary collection cylinder 1 and the primary collection cylinder 2 laterally, and realize the vertical positioning of the secondary collection cylinder 1 and the primary collection cylinder 2 through the vertical positioning protrusion 12 and the vertical positioning groove 13, so that the secondary collection cylinder 1 and the primary collection cylinder 2 are integrated to store soil samples. The truncation control mechanism 4 can truncate the soil samples 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 secondary collection cylinder 1 and the primary collection cylinder 2 from sliding down under the action of gravity.

[0043] The lateral locking control structure 6 includes a plurality of lateral positioning grooves 14 opened on the surface of the secondary collection cylinder 1. On the lower surface of the top tray body 5 directly above the lateral positioning grooves 14, there is an elastic control pulling groove 62. The inner wall of the elastic control pulling groove 62 is slidably connected with a lateral positioning column 63, and the lateral positioning column 63 is slidably connected with the inner wall of the corresponding lateral positioning groove 14. The center position of the surface of the lateral positioning column 63 is fixedly connected with a linkage sliding column 65, and the linkage sliding column 65 is slidably connected through the surface of the top tray body 5. The lateral positioning groove 14 is engaged with the lateral positioning column 63, so as to relatively fix the secondary collection cylinder 1 and the primary collection cylinder 2 laterally.

[0044] Between the tops of the linkage sliding columns 65, there is a fixedly connected arc-shaped linkage trigger rod 61 arranged in an arc shape. On the surface of the arc-shaped linkage trigger rod 61, there is a pulling trigger button 60. Between the upper surface of the lateral positioning column 63 and the inner top wall of the elastic control pulling groove 62, there is a pressing reset spring 64. 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 lateral positioning column 63 can be uniformly controlled by pulling the trigger button 60. The setting of the compression spring makes the pulling trigger button 60 automatically reset after being released.

[0045] On both sides of the primary collection cylinder 2, a plurality of uniformly distributed vertical positioning protrusions 12 are fixedly connected from top to bottom. On both sides of the secondary collection cylinder 1, vertical positioning grooves 13 are opened from top to bottom. The vertical positioning protrusion 12 is slidably connected with the inner wall of the corresponding vertical positioning groove 13.

[0046] The truncation control mechanism 4 includes a wire rope 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 on the surface of the top tray body 5. A control wire 10 is slidably connected to the inner wall of the wire rope protection cylinder 9. The bottom of the control wire 10 is fixedly connected to the inner wall of the drilling serrated 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 serrated knife 3 at the corresponding position is folded and tilted, realizing the control of the drilling serrated knife 3.

[0047] 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 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 installation hole 44 is formed through the surface position of the pulling plate 43. The control wire 10 is fixedly connected to the corresponding fixed installation hole 44. A pulling control lead screw 42 is meshed through one side position 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 installation 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.

[0048] 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.

[0049] A hinge fixed installation groove 7 is formed in the middle of the lower part of the inner wall of the main collection cylinder 2. A truncation control hinge 11 for rotational connection is fixedly connected between the upper surface of the drilling serrated knife 3 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 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 bottom soil, 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.

[0050] A main control grip 8 for controlling the main collection cylinder 2 is fixedly connected to the middle of the upper surface of the top tray body 5. The main control grip 8 facilitates carrying the device and controlling the device.

[0051] A sampling method for a sampling device for soil improvement, comprising the following specific steps:

[0052] Step 1. Select the target sampling site and mark it. Place the main sampling cylinder 2 and the auxiliary sampling cylinder 1 above the marked point. Hold the main control grip 8 and press down the main sampling cylinder 2 and the auxiliary sampling cylinder 1 so that the main sampling cylinder 2 and the auxiliary sampling cylinder 1 are inserted into the soil. Observe the insertion depth on the outer wall of the main sampling cylinder 2 and stop pressing when the target depth is reached.

[0053] Step 2. Rotate the auxiliary control grip 41 so that the control wire 10 is pulled, making the drilling serrated knife 3 at the corresponding position have an inclined force. During this process, it is necessary to rotate the main control grip 8 and continue to press the main control grip 8 so that the outer soil is fully separated from the outer walls of the main sampling cylinder 2 and the auxiliary sampling cylinder 1.

[0054] Step 3. Pull up the main control grip 8 to pull out the sample together with the main sampling cylinder 2 and the auxiliary sampling cylinder 1. Then separate the main sampling cylinder 2 and the auxiliary sampling cylinder 1, and the soil sample can be taken out from the main sampling cylinder 2 and the auxiliary sampling cylinder 1.

[0055] The working principle of this embodiment is as follows. The method for the main sampling cylinder 2 and the auxiliary sampling cylinder 1 to cooperate and fix is: control the pulling trigger button 60 so that the arc-shaped linkage trigger rod 61 drives the corresponding linkage sliding 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 auxiliary sampling cylinder 1 can be pulled, so that the main sampling cylinder 2 and the auxiliary sampling cylinder 1 are separated from each other. On the contrary, insert the vertical positioning protrusion 12 into the corresponding vertical positioning groove 13, release the pulling trigger button 60, and under the action of the pressing return spring 64, the horizontal positioning column 63 is inserted into the corresponding horizontal positioning groove 14 again, and the relative fixation of the main sampling cylinder 2 and the auxiliary sampling cylinder 1 can be completed.

[0056] By rotating the auxiliary control grip 41, the pulling control lead screw 42 is rotated, so that the pulling plate 43 slides upward, realizing the upward pulling of the control wire 10, making the drilling serrated knife 3 at the corresponding position fold and incline, and the sampled soil column can be separated from the land at the lower position.

[0057] 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 includes a sub - collection cylinder (1) and a main collection cylinder (2) with a split - type setting for conveniently taking out soil samples. At the middle position of the bottom surfaces of the sub - collection cylinder (1) and the main collection cylinder (2), there are cutting - into - soil drill - saw blades (3). At the top position of the main collection cylinder (2), there is a cylindrical top tray body (5) fixedly connected; On one side of the upper surface of the top tray body (5) close to the sub - collection cylinder (1), there is a lateral locking control structure (6) for laterally positioning the sub - collection cylinder (1). On the other side of the upper surface of the top tray body (5) away from the lateral locking control structure (6), there is a truncation control mechanism (4) for controlling the drill - saw blade (3) at the corresponding position; At the middle position of the lower part of the inner wall of the main collection cylinder (2), there is a hinge fixed - installation groove (7). Between the upper surface of the drill - saw blade (3) below the main collection cylinder (2) and the inner top wall of the hinge fixed - installation groove (7), there is a truncation control hinge (11) for rotational connection, and the truncation control hinge (11) is a spring hinge. The drill - saw blade (3) at the position below the sub - collection cylinder (1) is fixedly connected to the bottom of the sub - collection cylinder (1); The truncation control mechanism (4) includes a pull - wire steel - wire protection cylinder (9) fixedly connected to the middle part of the inner wall of the main collection cylinder (2) and a positioning control cylinder (40) fixed on the surface of the top tray body (5). The inner wall of the pull - wire steel - wire protection cylinder (9) is slidably connected with a control steel wire (10). The bottom position of the control steel wire (10) is fixedly connected to the inner wall of the drill - saw blade (3) below the main collection cylinder (2). The top of the control steel wire (10) penetrates and is slidably connected with the top tray body (5); On the inner wall of the positioning control cylinder (40), there are two symmetrically arranged limit sliding protrusions (45). The surface of the limit sliding protrusions (45) is arc - shaped. Inside the inner wall of the positioning control cylinder (40), there is a pulling plate (43) sliding up and down. On the surface of the pulling plate (43), there is a fixed - installation hole (44) penetrating. The control steel wire (10) is fixedly connected to the corresponding fixed - installation hole (44). On one side of the surface of the pulling plate (43), there is a pulling control lead screw (42) meshing through. The pulling control lead screw (42) is rotatably connected to the surface of the top tray body (5); On the surface of the pulling plate (43), there is a lead - screw nut fixedly penetrated, 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) penetrates and is rotatably connected to the top of the positioning control cylinder (40). At the top position of the pulling control lead screw (42), there is a secondary control grip (41) fixedly connected; In the middle of the upper surface of the top tray body (5), there is a main control grip (8) for controlling the main collection cylinder (2) fixedly connected.

2. The sampling device for soil improvement according to claim 1, characterized in that, The drilling serrated knife (3) is arranged in an arc shape, and the side away from the secondary collection cylinder (1) and the main collection cylinder (2) is serrated. The outer wall of the drilling serrated knife (3) and the outer walls away from the secondary collection cylinder (1) and the main collection cylinder (2) are both polished.

3. The sampling device for soil improvement according to claim 1, characterized in that: The lateral locking control structure (6) includes a number of lateral positioning grooves (14) opened on the surface of the secondary collection cylinder (1). An elastic control pulling groove (62) is opened on the lower surface of the top tray main body (5) directly above the lateral positioning groove (14). A lateral positioning column (63) is slidably connected to the inner wall of the elastic control pulling 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) is slidably connected through the surface of the top tray main body (5).

4. The sampling device for soil improvement according to claim 3, wherein, An arc-shaped linkage trigger rod (61) arranged in an arc shape 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 return spring (64) is fixedly connected between the upper surface of the lateral positioning column (63) and the inner top wall of the elastic control pulling groove (62). The pressing return spring (64) is a compression spring; 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 opened on 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).

5. A sampling method of a sampling device for soil improvement according to any one of claims 1-4, characterized in that The following are the specific steps: Step 1. Select the target sampling location and mark it. Place the main collection cylinder (2) and the secondary collection cylinder (1) above the mark. Hold the main control grip (8) and press down on the main collection cylinder (2) and the secondary collection cylinder (1) to insert the main collection cylinder (2) and the secondary collection cylinder (1) 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), so that the corresponding drilling serrated knife (3) has an inclined force. During this process, the main control grip (8) needs to be rotated and the main control grip (8) needs to be continuously pressed 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).

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