Soil sampling device for farmland pollution detection

Abstract

The utility model discloses a soil sampling device for farmland pollution detection, which comprises a machine body erected on the ground, and further comprises an insertion mechanism for performing insertion sampling on farmland soil, a drilling mechanism for performing drilling sampling on the farmland soil, and a crawler mechanism for driving the machine body to advance, the inserting and probing mechanism is arranged in the middle of the upper end of the machine body, the drilling mechanism is assembled at one end of the machine body, and the crawler belt mechanism is arranged on the side portion of the machine body. The sampling mode can be flexibly selected, the sampling efficiency is high, the stress area of the inserting and probing mechanism and the drilling mechanism during sampling is small, the borne resistance is small, the sampling difficulty can be reduced, sampling operation on deep soil is facilitated, the crawler belt mechanism is arranged, the crawler belt structure is convenient to move in farmland, automatic advancing can be achieved, and the automation degree is high.

Description

Technical Field

[0001] The utility model relates to the technical field of farmland soil sampling devices, in particular to a soil sampling device for farmland pollution detection. Background Art

[0002] In the prior art, soil sampling tubes are often used to sample the soil to be tested during soil pollution control, and necessary sampling, testing and analysis are performed on the soil. The collection of soil samples is the basic work in the fields of soil analysis research and geological exploration. The actual condition of the soil can be understood by analyzing and studying the soil samples, and soil analysis is a qualitative and quantitative determination of the composition and physical and chemical properties of the soil. Traditional soil pollution detection requires manual acquisition of soil, which has low work efficiency and consumes a lot of time. At the same time, manual sampling is not convenient for fixed-point collection of deep soil, resulting in certain limitations in sampling and detection. Some soil pollution monitoring devices are not convenient to move, which greatly increases the labor of the staff. In addition, the existing soil sampling device can only extract soil samples of a certain stratum depth in one operation. If soils of different stratum depths need to be sampled at the same location, multiple operations are required, which is time-consuming and labor-intensive.

[0003] The Chinese utility model patent with application number: 202222764252.4 discloses a soil sampling device for farmland pollution control, including a bracket, a through hole, a crossbeam, a lifting drive device, a rotating drive device and a sampling device, wherein the through hole is located at the bottom of the bracket, the crossbeam is arranged on the bracket, the lifting drive device is arranged at the upper end of the bracket, the rotating drive device is arranged on the crossbeam and connected to the lifting drive device, and the sampling device is arranged on the rotating drive device. However, this type of soil sampling device for farmland pollution control requires manual pushing to realize the movement of the device, its wheeled structure is not convenient for moving in the farmland, the degree of automation is low, and the labor intensity of the staff is increased. The sampling device adopts a barrel structure, and when sampling downward, its force area is large, resulting in a large resistance to the sampling device, which increases the difficulty of sampling. It only has one sampling method, and the soil sampling method cannot be changed according to the actual situation. The usage is relatively single, it is not convenient to perform sampling operations deep in the soil, and the sampling efficiency is low. Utility Model Content

[0004] The utility model aims to provide a soil sampling device for farmland pollution detection.

[0005] In order to achieve the above purpose, the technical solution proposed by the utility model is:

[0006] A soil sampling device for farmland pollution detection comprises a body, which is erected on the ground, and also comprises a probe mechanism for probing and sampling farmland soil, a drilling mechanism for drilling and sampling farmland soil, and a crawler mechanism for driving the body to move forward, wherein the probe mechanism is arranged in the middle of the upper end of the body, the drilling mechanism is mounted at one end of the body, and the crawler mechanism is arranged on the side of the body.

[0007] The probe mechanism includes a probe bracket, a probe guide tube and a downward probe assembly. The probe bracket is arranged at the upper end of the body and is fixedly connected to the body. The probe guide tube is vertically arranged on one side of the probe bracket and is fixedly connected to the probe bracket. The downward probe assembly is assembled on one side of the probe guide tube.

[0008] The downward probe assembly includes a downward probe cylinder, a downward probe rod and a soil cleaning block. The downward probe cylinder is arranged on a side of the probe guide tube away from the probe bracket and is fixedly connected to the probe guide tube. The output end of the downward probe cylinder is arranged upward. The downward probe rod is arranged at the output end of the downward probe cylinder and its upper end is fixedly connected to the output end of the downward probe cylinder through a bracket. The downward probe rod is inserted in the probe guide tube and the lower end of the downward probe rod protrudes from the probe guide tube. The soil cleaning block is arranged at the lower end of the probe guide tube and is fixedly connected to the probe guide tube.

[0009] It also includes a soil collecting box, which is arranged on the inner side of the machine body corresponding to the downward probe rod and is fixedly connected to the machine body. The upper end of the soil collecting box close to the downward probe rod is provided with a soil dropping side plate, which is inclined and has an avoidance groove in the middle corresponding to the downward probe rod.

[0010] The interior of the downward probe rod is a hollow structure and a soil cleaning groove is provided on the lower side close to the soil cleaning block. The soil cleaning block is a wedge-shaped structure and is arranged on the inner side of the soil cleaning groove. Both ends of the soil cleaning block protrude from the soil cleaning groove and the soil cleaning block is located above the soil falling side plate.

[0011] The drilling mechanism includes a drilling installation barrel, a drilling support, a drilling motor and a drilling screw. The drilling installation barrel is vertically arranged at one end of the machine body and fixedly connected to the machine body. The drilling support is arranged above the drilling installation barrel via a support rod and fixedly connected to the drilling installation barrel. The drilling motor is arranged on the upper part of the drilling support and fixedly connected to the drilling support. The output end of the drilling motor passes through the drilling support and is arranged downward. The drilling screw is arranged at the output end of the drilling motor and its upper end is fixedly connected to the output end of the drilling motor. The drilling screw is located on the inner side of the drilling installation barrel.

[0012] It also includes a conveying component, which includes a conveying box, a conveying motor and a conveying auger. The conveying box is arranged at the lower part of the side of the drilling installation tube away from the body and is fixedly connected to the drilling installation tube. The conveying motor is arranged at one end of the conveying box and is fixedly connected to the conveying box. The conveying motor is horizontally arranged and its output end passes through the conveying box. The conveying auger is arranged at the output end of the conveying motor and is fixedly connected to the output end of the conveying motor. The conveying auger is arranged inside the conveying box and the end of the conveying auger away from the conveying motor is rotatably connected to the conveying box.

[0013] It also includes a soil falling guide plate, which is arranged at the upper end of the drilling installation cylinder and fixedly connected to the drilling installation cylinder. The soil falling guide plate is arranged inclined toward the conveying box and the upper end of the drilling installation cylinder is arranged inclined corresponding to the soil falling guide plate.

[0014] The track mechanism includes a driving motor, a driving wheel, supporting rollers and a traveling track. The driving motor is arranged on the upper part of an end of the machine body away from the drilling installation tube and is fixedly connected to the machine body. The driving wheel is arranged on a side of the machine body close to the driving motor and is transmission-connected to the output end of the driving motor through a reducer. The supporting roller is arranged on a side of the machine body away from the driving motor and is rotationally connected to the machine body. The traveling track is arranged around the outside of the driving wheel and the supporting roller. The track mechanism is provided with two groups, and the two groups of track mechanisms are symmetrically arranged on both sides of the machine body. The machine body is erected on the ground through the two groups of track mechanisms.

[0015] It also includes an electric control unit, which is arranged on a side of the upper end of the body away from the drive motor and fixedly connected to the body. The electric control unit is electrically connected to the lowering cylinder, the drilling motor, the conveying motor and the drive motor.

[0016] The beneficial effects of the utility model are:

[0017] A probe mechanism and a drilling mechanism are coordinated to form a double-combination sampling structure to realize different sampling operations according to the soil environment. The sampling method can be flexibly selected with high sampling efficiency. The probe mechanism and the drilling mechanism have a small force area during sampling and are subject to small resistance, which can reduce the difficulty of sampling and facilitate sampling operations deep in the soil. A crawler mechanism is provided, and the crawler structure is easy to move in the farmland and can realize automatic movement without manual advancement. It has a high degree of automation and effectively reduces the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2This is a schematic diagram of the cooperation between the probe mechanism and the machine body of the utility model;

[0020] Figure 3 This is a schematic diagram of the cooperation between the probe assembly and the probe guide tube of the utility model;

[0021] Figure 4 It is a cross-sectional view of the cooperation between the probe assembly and the probe guide tube of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the drilling mechanism of the utility model;

[0023] Figure 6 This is an electrical connection diagram of the utility model.

[0024] In the figure: 1. machine body; 2. probe bracket; 3. probe guide tube; 4. probe cylinder; 5. probe rod; 6. soil clearing block; 7. soil collecting box; 8. drilling installation tube; 9. drilling bracket; 10. drilling motor; 11. drilling screw; 12. conveying box; 13. conveying motor; 14. conveying auger; 15. soil falling guide plate; 16. driving motor; 17. driving wheel; 18. supporting wheel; 19. traveling track; 20. electronic control unit. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] A soil sampling device for farmland pollution detection includes a body 1, which is erected on the ground, and also includes an insertion mechanism for inserting and sampling farmland soil, a drilling mechanism for drilling and sampling farmland soil, and a crawler mechanism for driving the body 1 to move forward. The insertion mechanism is arranged in the middle of the upper end of the body 1, the drilling mechanism is assembled at one end of the body 1, and the crawler mechanism is arranged on the side of the body 1. The overall structural schematic diagram of the utility model is as shown in Figure 1 shown.

[0027] The insertion mechanism includes a insertion bracket 2, an insertion guide tube 3 and a downward probe component. The insertion bracket 2 is arranged at the upper end of the body 1 and is fixedly connected to the body 1. The insertion guide tube 3 is vertically arranged on one side of the insertion bracket 2 and is fixedly connected to the insertion bracket 2. The downward probe component is assembled on one side of the insertion guide tube 3. The insertion mechanism cooperates with the insertion bracket 2, the insertion guide tube 3 and the downward probe component to form a insertion sampling structure in the sampling device to perform insertion sampling of the soil, wherein the insertion bracket 2 is used to provide installation support for the insertion guide tube 3, the insertion guide tube 3 is used to provide installation support for the downward probe component and to perform insertion guidance on the downward probe component, and the downward probe component is used to perform insertion sampling of the soil. The schematic diagram of the insertion mechanism of the utility model cooperating with the body 1 is shown in Figure 2 shown.

[0028] The down-probing assembly includes a down-probing cylinder 4, a down-probing rod 5 and a soil-clearing block 6. The down-probing cylinder 4 is arranged on a side of the probe guide tube 3 away from the probe bracket 2 and is fixedly connected to the probe guide tube 3. The output end of the down-probing cylinder 4 is arranged upward, the down-probing rod 5 is arranged at the output end of the down-probing cylinder 4 and its upper end is fixedly connected to the output end of the down-probing cylinder 4 through the bracket. The down-probing rod 5 is inserted in the probe guide tube 3 and the lower end of the down-probing rod 5 protrudes from the probe guide tube 3. The soil-clearing block 6 is arranged at the lower end of the probe guide tube 3 and is connected to the probe guide The pipe 3 is fixedly connected, and the probe assembly cooperates with the probe cylinder 4, the probe rod 5 and the soil cleaning block 6 to perform soil sampling. The probe cylinder 4 is used to provide installation support for the probe rod 5 and drive the probe rod 5 to lift and lower. The probe rod 5 is used to lift and lower under the action of the probe cylinder 4 to perform soil sampling. The soil cleaning block 6 is used to scrape the soil taken out by the probe rod 5 out of the probe rod 5 after the sampling of the probe rod 5 is completed. The schematic diagram of the cooperation between the probe assembly of the utility model and the probe guide pipe 3 is shown in Figure 3 shown.

[0029] It also includes a soil collecting box 7, which is arranged on the inner side of the machine body 1 corresponding to the lower probe rod 5 and is fixedly connected to the machine body 1. The upper end of the soil collecting box 7 close to the lower probe rod 5 is provided with a soil-falling side plate, which is inclined and has an avoidance groove in the middle corresponding to the lower probe rod 5. The soil collecting box 7 is used as a soil collecting structure of the lower probe component to collect the soil scraped out by the soil cleaning block 6. The cross-sectional view of the lower probe component of the utility model and the probe guide pipe 3 is shown in FIG. Figure 4 shown.

[0030] The interior of the lower exploration rod 5 is a hollow structure and a soil cleaning groove is provided on one side of its lower part near the soil cleaning block 6. The soil cleaning block 6 is set to a wedge-shaped structure and is arranged on the inner side of the soil cleaning groove. The two ends of the soil cleaning block 6 protrude from the soil cleaning groove and the soil cleaning block 6 is located above the soil falling side plate. The soil cleaning groove is used as a soil cleaning structure on the lower exploration rod 5, thereby providing an installation space for the soil cleaning block 6 so that the soil cleaning block 6 can scrape the soil from the lower exploration rod 5. When it is necessary to perform soil probing and sampling, the lower exploration cylinder 4 drives the lower exploration rod 5 to descend along the probing guide tube 3 and insert it into the soil. The soil enters the interior of the lower exploration rod 5. After being inserted to the specified depth, the lower exploration cylinder 4 drives the lower exploration rod 5 to rise, and the soil cleaning block 6 scrapes the soil inside the lower exploration rod 5 along the soil cleaning groove. The scraped soil falls into the soil collecting box 7 along the soil falling side plate, and the soil probing and sampling operation can be completed.

[0031] The drilling mechanism includes a drilling installation barrel 8, a drilling bracket 9, a drilling motor 10 and a drilling screw 11. The drilling installation barrel 8 is vertically arranged at one end of the machine body 1 and is fixedly connected to the machine body 1. The drilling bracket 9 is arranged above the drilling installation barrel 8 via a support rod and is fixedly connected to the drilling installation barrel 8. The drilling motor 10 is arranged on the upper part of the drilling bracket 9 and is fixedly connected to the drilling bracket 9. The output end of the drilling motor 10 passes through the drilling bracket 9 and is arranged downward. The drilling screw 11 is arranged at the output end of the drilling motor 10 and its upper end is fixedly connected to the output end of the drilling motor 10. The drilling screw 11 is located on the inner side of the drilling installation barrel 8. The drilling mechanism is connected to the drilling bracket 9 through the drilling installation barrel 8. The mounting tube 8, the drilling bracket 9, the drilling motor 10 and the drilling screw 11 cooperate to drill and sample the soil, wherein the drilling mounting tube 8 is used to provide mounting support for the drilling bracket 9 and guide the drilling screw 11, the drilling bracket 9 is used to provide mounting support for the drilling motor 10, and the drilling depth of the drilling screw 11 can be adjusted by adjusting the height of the drilling bracket 9 on the support rod, the drilling motor 10 is used to provide mounting support for the drilling screw 11 and drive the drilling screw 11 to rotate, and the drilling screw 11 is used to rotate under the action of the drilling motor 10 to drill and sample the soil at a specified position. The structural schematic diagram of the drilling mechanism of the utility model is shown as follows Figure 5 shown.

[0032] It also includes a conveying component, which includes a conveying box 12, a conveying motor 13 and a conveying auger 14. The conveying box 12 is arranged at the lower part of the side of the drilling installation tube 8 away from the body 1 and is fixedly connected to the drilling installation tube 8. The conveying motor 13 is arranged at one end of the conveying box 12 and is fixedly connected to the conveying box 12. The conveying motor 13 is horizontally arranged and its output end passes through the conveying box 12. The conveying auger 14 is arranged at the output end of the conveying motor 13 and is fixedly connected to the output end of the conveying motor 13. The conveying auger 14 is arranged inside the conveying box 12 and the end of the conveying auger 14 away from the conveying motor 13 is rotatably connected to the conveying box 12. The conveying component cooperates with the conveying box 12, the conveying motor 13 and the conveying auger 14 to convey the soil taken out by the drilling mechanism, wherein the conveying box 12 is used Provide installation support for the conveying motor 13 and the conveying auger 14. The conveying motor 13 is used to drive the conveying auger 14 to rotate. The conveying auger 14 is used to rotate under the action of the conveying motor 13 to convey the soil in the conveying box 12. When it is necessary to drill and sample the soil, the height of the drilling bracket 9 on the support rod is adjusted according to the drilling requirements to adjust the drilling depth of the drilling screw 11. The drilling motor 10 drives the drilling screw 11 to rotate to drill and sample the soil. The soil rises along the drilling screw 11 and falls on the soil guide plate 15 through the opening at the upper end of the drilling installation tube 8, and then falls into the conveying box 12 along the soil guide plate 15. The conveying motor 13 drives the conveying auger 14 to rotate to convey the soil in the conveying box 12, and the soil drilling and sampling operation can be completed.

[0033] It also includes a soil falling guide plate 15, which is arranged at the upper end of the drilling installation cylinder 8 and fixedly connected to the drilling installation cylinder 8, the soil falling guide plate 15 is inclined toward the conveying box 12 and the upper end of the drilling installation cylinder 8 is inclined corresponding to the soil falling guide plate 15, wherein the soil falling guide plate 15 is used as a guiding structure between the drilling installation cylinder 8 and the conveying box 12.

[0034] The crawler mechanism includes a drive motor 16, a drive wheel 17, a supporting roller 18 and a traveling crawler 19. The drive motor 16 is arranged on the upper part of one end of the machine body 1 away from the drilling installation tube 8 and is fixedly connected to the machine body 1. The drive wheel 17 is arranged on the side of the machine body 1 close to the drive motor 16 and is transmission-connected to the output end of the drive motor 16 through a reducer. The supporting roller 18 is arranged on the side of the machine body 1 away from the drive motor 16 and is rotationally connected to the machine body 1. The traveling crawler 19 is arranged around the outside of the drive wheel 17 and the supporting roller 18. The crawler mechanism is provided with two groups, and the two groups of crawler mechanisms are symmetrically arranged on both sides of the machine body 1. The machine body 1 is erected on the ground through the two groups of crawler mechanisms. On the surface, a tensioning wheel can be added to the inner side of the traveling track 19 according to actual use requirements. The track mechanism cooperates with the drive motor 16, the drive wheel 17, the supporting roller 18 and the traveling track 19 to form a traveling structure of the sampling device to drive the sampling device to move. The drive motor 16 is used to drive the drive wheel 17 to rotate through the reducer. The drive wheel 17 is used to rotate under the action of the drive motor 16 and drive the traveling track 19 to rotate. The supporting roller 18 is used to provide support for the sampling device and together with the drive wheel 17 constitute a wheel group in the track structure to meet the travel requirements of the sampling device. The traveling track 19 is used to follow the rotation of the drive wheel 17 to realize the travel of the sampling device.

[0035] The utility model also includes an electric control unit 20, which is arranged on a side of the upper end of the body 1 away from the drive motor 16 and is fixedly connected to the body 1. The electric control unit 20 is electrically connected to the lowering cylinder 4, the drilling motor 10, the conveying motor 13 and the drive motor 16. The electrical connection diagram of the utility model is as shown in FIG. Figure 6 shown.

[0036] Working principle:

[0037] The device is started by the electronic control unit 20, which controls the crawler mechanism to drive the sampling device to move in the farmland to the designated position. Different soil sampling methods are implemented according to the soil quality. If the soil quality is soft, the soil is sampled by the insertion mechanism. During the insertion sampling, the lower probe cylinder 4 drives the lower probe rod 5 to descend along the insertion guide tube 3 and insert it into the soil. The soil enters the lower probe rod 5. After being inserted to the designated depth, the lower probe cylinder 4 drives the lower probe rod 5 to rise, and the soil cleaning block 6 scrapes the soil inside the lower probe rod 5 along the soil cleaning groove. The scraped soil falls into the soil collecting box 7 along the soil falling side plate, and the sampling is completed. For the soil probing sampling operation, if the soil is hard, the soil is drilled and sampled through the drilling mechanism. During the drilling sampling, the height of the drilling bracket 9 on the support rod is adjusted according to the drilling requirements to adjust the drilling depth of the drilling screw 11. The drilling motor 10 drives the drilling screw 11 to rotate to drill and sample the soil. The soil rises along the drilling screw 11 and falls on the soil guide plate 15 through the opening at the upper end of the drilling installation tube 8. Then, it falls into the conveying box 12 along the soil guide plate 15. The conveying motor 13 drives the conveying auger 14 to rotate to transfer the soil in the conveying box 12, and the soil drilling sampling operation is completed.

[0038] The beneficial effects of the utility model are that a probe mechanism is provided to cooperate with a drilling mechanism to form a double-combination sampling structure to realize different sampling operations according to the soil environment, the sampling method can be flexibly selected, the sampling efficiency is high, and the probe mechanism and the drilling mechanism have a small force area during sampling, and the resistance they encounter is small, which can reduce the difficulty of sampling and facilitate sampling operations deep in the soil. A crawler mechanism is provided, and the crawler structure is easy to move in the farmland, and can realize automatic movement without manual propulsion. The degree of automation is high, and the labor intensity of the staff is effectively reduced.

[0039] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A soil sampling device for detecting farmland pollution, comprising a body (1), wherein the body (1) is erected on the ground, and is characterized in that: It also includes a probe mechanism for probing and sampling farmland soil, a drilling mechanism for drilling and sampling farmland soil, and a crawler mechanism for driving the machine body (1) to move forward, the probe mechanism being arranged in the middle of the upper end of the machine body (1), the drilling mechanism being mounted at one end of the machine body (1), and the crawler mechanism being arranged on the side of the machine body (1).

2. A soil sampling device for farmland pollution detection as claimed in claim 1, characterized in that: The probe mechanism comprises a probe bracket (2), a probe guide tube (3) and a probe assembly, wherein the probe bracket (2) is arranged at the upper end of the machine body (1) and is fixedly connected to the machine body (1), the probe guide tube (3) is vertically arranged on one side of the probe bracket (2) and is fixedly connected to the probe bracket (2), and the probe assembly is assembled on one side of the probe guide tube (3).

3. A soil sampling device for farmland pollution detection as claimed in claim 2, characterized in that: The probe assembly comprises a probe cylinder (4), a probe rod (5) and a soil clearing block (6); the probe cylinder (4) is arranged on a side of the probe guide tube (3) away from the probe bracket (2) and is fixedly connected to the probe guide tube (3); the output end of the probe cylinder (4) is arranged upward; the probe rod (5) is arranged at the output end of the probe cylinder (4) and its upper end is fixedly connected to the output end of the probe cylinder (4) through a bracket; the probe rod (5) is inserted into the probe guide tube (3) and the lower end of the probe rod (5) protrudes from the probe guide tube (3); the soil clearing block (6) is arranged at the lower end of the probe guide tube (3) and is fixedly connected to the probe guide tube (3).

4. A soil sampling device for farmland pollution detection as claimed in claim 3, characterized in that: It also comprises a soil collecting box (7), which is arranged on the inner side of the machine body (1) corresponding to the downward probe rod (5) and is fixedly connected to the machine body (1), and a soil dropping side plate is provided at the upper end of one side of the soil collecting box (7) close to the downward probe rod (5), the soil dropping side plate is arranged obliquely and a avoidance groove is provided in the middle thereof corresponding to the downward probe rod (5).

5. A soil sampling device for farmland pollution detection as claimed in claim 4, characterized in that: The interior of the downward probe rod (5) is a hollow structure and a soil cleaning groove is provided on a side of the lower part thereof close to the soil cleaning block (6). The soil cleaning block (6) is a wedge-shaped structure and is arranged inside the soil cleaning groove. Both ends of the soil cleaning block (6) protrude from the soil cleaning groove and the soil cleaning block (6) is located above the soil landing side plate.

6. A soil sampling device for farmland pollution detection as claimed in claim 5, characterized in that: The drilling mechanism comprises a drilling installation cylinder (8), a drilling support (9), a drilling motor (10) and a drilling screw (11); the drilling installation cylinder (8) is vertically arranged at one end of the machine body (1) and fixedly connected to the machine body (1); the drilling support (9) is arranged above the drilling installation cylinder (8) via a support rod and fixedly connected to the drilling installation cylinder (8); the drilling motor (10) is arranged on the upper part of the drilling support (9) and fixedly connected to the drilling support (9); the output end of the drilling motor (10) passes through the drilling support (9) and is arranged downward; the drilling screw (11) is arranged at the output end of the drilling motor (10) and its upper end is fixedly connected to the output end of the drilling motor (10); the drilling screw (11) is located on the inner side of the drilling installation cylinder (8).

7. A soil sampling device for farmland pollution detection as claimed in claim 6, characterized in that: It also includes a conveying component, which includes a conveying box (12), a conveying motor (13) and a conveying auger (14); the conveying box (12) is arranged at the lower part of the side of the drilling installation tube (8) away from the machine body (1) and is fixedly connected to the drilling installation tube (8); the conveying motor (13) is arranged at one end of the conveying box (12) and is fixedly connected to the conveying box (12); the conveying motor (13) is arranged horizontally and its output end passes through the conveying box (12); the conveying auger (14) is arranged at the output end of the conveying motor (13) and is fixedly connected to the output end of the conveying motor (13); the conveying auger (14) is arranged inside the conveying box (12) and the end of the conveying auger (14) away from the conveying motor (13) is rotatably connected to the conveying box (12).

8. A soil sampling device for farmland pollution detection as claimed in claim 7, characterized in that: It also comprises a soil falling guide plate (15), which is arranged at the upper end of the drilling installation cylinder (8) and is fixedly connected to the drilling installation cylinder (8), the soil falling guide plate (15) is arranged inclined toward the conveying box (12), and the upper end of the drilling installation cylinder (8) is arranged inclined corresponding to the soil falling guide plate (15).

9. A soil sampling device for farmland pollution detection as claimed in claim 8, characterized in that: The crawler mechanism comprises a driving motor (16), a driving wheel (17), a supporting roller (18) and a traveling crawler (19); the driving motor (16) is arranged at the upper part of one end of the machine body (1) away from the drilling installation tube (8) and is fixedly connected to the machine body (1); the driving wheel (17) is arranged at a side of the machine body (1) close to the driving motor (16) and is transmission-connected to the output end of the driving motor (16) through a reducer; the supporting roller (18) is arranged at a side of the machine body (1) away from the driving motor (16) and is rotationally connected to the machine body (1); the traveling crawler (19) is arranged around the outer sides of the driving wheel (17) and the supporting roller (18); the crawler mechanism is provided with two groups, and the two groups of crawler mechanisms are symmetrically arranged on both sides of the machine body (1); the machine body (1) is erected on the ground through the two groups of crawler mechanisms.

10. A soil sampling device for farmland pollution detection as claimed in claim 9, characterized in that: The invention also comprises an electric control unit (20), wherein the electric control unit (20) is arranged on a side of the upper end of the machine body (1) away from the drive motor (16) and is fixedly connected to the machine body (1), and the electric control unit (20) is electrically connected to the lowering cylinder (4), the drilling motor (10), the conveying motor (13) and the drive motor (16).

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