Detachable deep soil sampling device

Abstract

The invention discloses a detachable deep soil sampling device which comprises a supporting main frame, two fixed track frames, a lifting track frame, two L-shaped connecting frames, a soil taking cylinder and a soil drilling driving mechanism, a soil drilling cutter is arranged at the bottom of the soil drilling driving mechanism, and four connecting rods are installed between the soil drilling driving mechanism and the soil drilling cutter. Four arc-shaped side doors are rotatably connected to the inner side of the soil drilling cutter, the four arc-shaped side doors shield the opening of the annular concave area of the soil drilling cutter, and four soil inlet bottom openings are formed in the bottom of the soil drilling cutter; large broken stones in soil are blocked by the stone blocking roller, the broken stones are prevented from entering the soil drilling cutter to affect soil discharging and taking work, the broken stones are guided and extruded into soil on the outer side through the stone pushing inclined plate, and meanwhile, the protective pipe wraps and protects a columnar soil sample on the inner side; therefore, accuracy and reliability of subsequent analysis and detection results of the soil sample are guaranteed, and analysis data deviation caused by structural damage of the soil sample is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of environmental detection, and in particular to a detachable deep soil sampling device. Background Art

[0002] In many fields such as soil science research, environmental monitoring, and agricultural production, it is crucial to sample deep soil to obtain representative soil samples. At present, there is a type of deep soil sampling equipment that first takes out the ring-shaped soil outside the sampling part, and then takes out the middle columnar soil sample separately. This method helps to improve the original structure effect of deep samples to a certain extent.

[0003] However, in actual use, it was found that the annular soil drill equipped with this type of equipment often encounters gravel in the soil when drilling the outer annular soil. Due to the drilling action of the annular soil drill, the gravel is easily squeezed toward the columnar soil sample position left in the middle after being stressed. This squeezing phenomenon will damage the structure of the columnar soil sample and destroy its original structural integrity, thereby affecting the accuracy and reliability of subsequent analysis and test results of the soil samples. Damage to the soil sample structure will cause deviations in the analysis data, which cannot truly reflect the actual condition of the soil. In addition, it is easy to block the bottom entrance of the annular soil drill, thereby affecting the stability of soil extraction.

[0004] To this end, we propose a detachable deep soil sampling device. Summary of the invention

[0005] The main purpose of the invention is to provide a detachable deep soil sampling device.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A detachable deep soil sampling device comprises a supporting main frame, two fixed track frames, a lifting track frame, two L-shaped connecting frames, a soil sampling tube and a soil drilling drive mechanism, wherein a soil drilling knife is arranged at the bottom of the soil drilling drive mechanism, four connecting rods are installed between the soil drilling drive mechanism and the soil drilling knife, four arc-shaped side doors are rotatably connected to the inner side of the soil drilling knife, the four arc-shaped side doors are distributed in a circular array, the four arc-shaped side doors all block the opening of the annular recessed area of ​​the soil drilling knife, four soil inlet bottom openings are opened at the bottom of the soil drilling knife, and the four soil inlet bottom openings correspond to the positions of the four arc-shaped side doors one by one. The four soil entry bottom openings are each provided with an inclined surface, the angle of the inclined surface corresponds to the rotation direction of the soil drilling knife, the inner walls of the four soil entry bottom openings are rotatably connected to a plurality of stone-blocking rollers, which are equidistantly distributed corresponding to the plurality of stone-blocking rollers, four stone-pushing inclined plates are installed at the bottom end of the soil drilling knife, and the four stone-pushing inclined plates correspond to the positions of the four inclined surfaces one by one, four rotating inner rods are rotatably connected between the soil drilling drive mechanism and the soil drilling knife, soil drilling gears are each installed at the bottom end of the four rotating inner rods, the side walls of the four soil drilling gears are rotatably connected to a rotating outer tube, and the arc-shaped side door is installed on the side wall of the rotating outer tube.

[0008] A further improvement of the present invention is that a protective tube is installed at the bottom end of the soil boring tool, the four stone pushing inclined plates are all installed on the side walls of the protective tube, and the soil boring gear is not in contact with the stone pushing inclined plates and the protective tube.

[0009] A further improvement of the present invention is that a limit insert is provided on the inner side of the four arc-shaped side doors, four electrically-controlled telescopic rods are installed on the top of the drilling knife, and the output ends of the four electrically-controlled telescopic rods are plugged into the corresponding inner walls of the limit insert.

[0010] A further improvement of the present invention is that four right-angle scrapers are slidably connected to the inner wall of the soil drilling knife, and a first traction rope and a second traction rope are installed on both sides of the four right-angle scrapers. One end of the first traction rope is installed on the inner side of the corresponding arc-shaped side door, and a reel for storing the second traction rope is installed on the inner wall of the soil drilling knife.

[0011] A further improvement of the present invention is that an aisle ring is installed on the inner wall of the top of the drilling knife, and limiting slide grooves are provided on both sides of the aisle ring. A connecting groove is provided on the top of the right-angle scraper, and the right-angle scraper is slidably connected to the outer side of the aisle ring through the connecting groove and the limiting slide groove.

[0012] A further improvement of the present invention is that a detachable deep soil sampling device comprises the following steps:

[0013] S1. Soil sampling: The device adjusts the positions of the soil sampling tube and the soil drilling drive mechanism through a fixed track frame, a lifting track frame, and an L-shaped connecting frame. The soil drilling drive mechanism drives the soil drilling knife to move to the lifting track frame area with the help of a connecting rod. The lifting track frame descends, so that the soil drilling knife cuts the soil in a circular manner to complete the collection of the circular soil. At this time, the four arc-shaped side doors flip and merge in the direction of the soil drilling knife to form a tight sealing structure, so that the circular soil is stably retained inside the soil drilling knife. The soil drilling gear rotates to complete the crushing of the soil. The soil enters the soil drilling knife through the bottom of the soil inlet. The inclined surface guides and cuts the soil to facilitate its entry. The stone blocking roller blocks the larger gravel, and the smaller gravel and soil enter the soil drilling knife. The larger gravel is blocked by the stone blocking roller and approaches the position of the stone pushing inclined plate as it rotates. The stone pushing inclined plate guides and pushes the gravel to squeeze the soil outside;

[0014] S2. Component locking: When the curved side door is closed, the limit plug on the inner side of the curved side door is transferred to the bottom of the electric telescopic rod installed on the top of the drilling knife, and the output end of the electric telescopic rod is plugged into the inner wall of the corresponding limit plug to complete the locking between the drilling knife and the curved side door, ensuring that the curved side door will not be accidentally opened during the drilling process;

[0015] S3. Soil discharge and cleaning: The arc-shaped side door is rotated outward to open, and the soil inside the drill cutter falls automatically. The drill cutter pulls the right-angle scraper through the first traction rope. The right-angle scraper uses both sides to scrape the soil on the inner wall of the drill cutter to achieve soil push, improve the soil shedding effect, and reduce residue. When the arc-shaped side door is closed, the winder on the inner wall of the drill cutter drives the wind-up rod through the internal spring to automatically wind and pull the second traction rope, pulling the right-angle scraper to slide back. The aisle ring on the inner wall of the top of the drill cutter guides and limits the right-angle scraper through the limiting slide groove and the connecting groove at the top of the right-angle scraper to ensure stable sliding of the right-angle scraper.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the stone-blocking roller blocks larger gravel in the soil to prevent the gravel from entering the soil drill and affecting the soil drainage work, and the stone-pushing inclined plate is used to guide and squeeze the gravel into the outer soil to avoid damage to the columnar soil sample by the gravel. At the same time, the protective pipe wraps and protects the inner columnar soil sample, further reducing the influence of external factors on the soil sample structure, thereby ensuring the accuracy and reliability of subsequent analysis and test results of the soil samples, reducing the analysis data deviation caused by damage to the soil sample structure, thereby ensuring the accuracy and reliability of subsequent analysis and test results of the soil samples.

[0017] Compared with the prior art, the beneficial effects of the present invention are: through the openable and closable design of the arc-shaped side door and the scraping effect of the right-angle scraper on the soil on the inner wall of the drilling knife, the soil shedding effect can be effectively improved, the soil residue in the device can be reduced, the soil can be discharged smoothly, and the efficiency of the entire sampling operation can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a detachable deep soil sampling device of the present invention Figure 1 .

[0019] Figure 2 A schematic diagram of the three-dimensional structure of a detachable deep soil sampling device of the present invention Figure 2 .

[0020] Figure 3 An enlarged schematic diagram of a detachable deep soil sampling device of the present invention. Figure 1 .

[0021] Figure 4 An enlarged schematic diagram of a detachable deep soil sampling device of the present invention. Figure 2 .

[0022] Figure 5 A detachable deep soil sampling device of the present invention Figure 4 Enlarged schematic diagram of part A in the middle.

[0023] Figure 6 A detachable deep soil sampling device of the present invention Figure 4 Enlarged schematic diagram of part B in the middle.

[0024] In the figure: 1. Support main frame; 11. Fixed track frame; 12. Lifting track frame; 13. L-shaped connecting frame; 14. Soil taking barrel; 15. Soil drilling drive mechanism; 151. Connecting rod; 2. Soil drilling knife; 21. Curved side door; 211. Limiting plug; 22. Soil inlet bottom; 221. Inclined surface; 222. Stone-blocking roller; 23. Stone-pushing inclined plate; 24. Protective tube; 25. Electric telescopic rod; 3. Rotating inner rod; 31. Soil drilling gear; 32. Rotating outer tube; 4. Right-angle scraper; 41. First traction rope; 42. Second traction rope; 421. Winder; 43. Connecting groove; 5. Aisle ring; 51. Limiting slide groove. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific embodiments, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and should not be understood as limitations on this patent. In order to better illustrate the specific embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] The standard parts used in this application can all be purchased from the market, and special-shaped parts can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, and bonding in the existing technology, and the components used for circuit connection are all conventional models in the existing technology.

[0027] At the same time, in order to clearly express the connection relationship and working principle between the components and highlight the key points, the drawings in the specification are organized and drawn in the form of simple diagrams. One simple diagram can correspond to a variety of materials and actual external structural shapes.

[0028] See also Figure 1-Figure 6 A detachable deep soil sampling device comprises a supporting main frame 1, two fixed track frames 11, a lifting track frame 12, two L-shaped connecting frames 13, a soil sampling tube 14 and a soil drilling driving mechanism 15. A soil drilling knife 2 is arranged at the bottom of the soil drilling driving mechanism 15. Four connecting rods 151 are installed between the soil drilling driving mechanism 15 and the soil drilling knife 2. Four arc-shaped side doors 21 are rotatably connected to the inner side of the soil drilling knife 2. The four arc-shaped side doors 21 are distributed in a circular array. The four arc-shaped side doors 21 all block the opening of the annular recessed area of ​​the soil drilling knife 2. Four soil inlet bottom openings 22 are opened at the bottom of the soil drilling knife 2. The four soil inlet bottom openings 22 are in a one-to-one relationship with the four arc-shaped side doors 21. In response, the four soil entry bottom openings 22 are each provided with an inclined surface 221, the angle of the inclined surface 221 corresponds to the rotation direction of the soil drilling knife 2, the inner walls of the four soil entry bottom openings 22 are rotatably connected to a plurality of stone-blocking rollers 222, and the corresponding plurality of stone-blocking rollers 222 are equidistantly distributed, four stone-pushing inclined plates 23 are installed at the bottom end of the soil drilling knife 2, and the positions of the four stone-pushing inclined plates 23 correspond one to one to the four inclined surfaces 221, four rotating inner rods 3 are rotatably connected between the soil drilling drive mechanism 15 and the soil drilling knife 2, and soil drilling gears 31 are each installed at the bottom end of the four rotating inner rods 3, and the side walls of the four soil drilling gears 31 are rotatably connected to rotating outer tubes 32, and the arc-shaped side door 21 is installed on the side wall of the rotating outer tube 32.

[0029] In this embodiment, the device body and each distribution structure are connected in a detachable manner, which is convenient for maintenance and assembly. The support main frame 1 completes the position adjustment of the soil taking tube 14 and the soil drilling drive mechanism 15 through two fixed track frames 11, the lifting track frame 12, and the L-shaped connecting frame 13. The soil drilling drive mechanism 15 drives the soil drilling knife 2 to move to the lifting track frame 12 area through the connecting rod 151, and the lifting track frame 12 is lowered, so that the soil drilling knife 2 can perform circular cutting on the soil to take soil. After the soil drilling knife 2 is completed, it is transferred from the fixed track frame 11 to the lifting track frame 12 position and then lowered to complete the columnar soil The soil drilling knife 2 is hollow in the middle, and the outer side of the soil drilling knife 2 is an annular depression. When the four arc-shaped side doors 21 are turned and merged toward the soil drilling knife 2, the four arc-shaped side doors 21 enclose the soil drilling knife 2 to form a tight blocking effect, so that the annular soil taken out by the soil drilling knife 2 can be stably retained inside. When the arc-shaped side door 21 is rotated outward to open, the soil inside the soil drilling knife 2 is discharged to the ground. The soil drilling drive mechanism 15 rotates the rotating inner rod 3 and the rotating outer tube 32 through the cooperation of the internal gear set, and the rotating outer tube 32 controls the arc-shaped side door 21 to open or close, and the bottom of the soil drilling drive mechanism 15 The soil drill 2 also rotates by itself, so that when the soil drill 2 drives the rotating inner rod 3 and the soil drill gear 31 to rotate, the soil drill gear 31 can rotate by itself to complete the soil crushing, so that the soil can enter the soil drill 2 from the soil inlet bottom 22. The inclined surface 221 makes the soil inlet bottom 22 have a guiding and cutting effect on the soil, which is convenient for the soil to enter. A plurality of stone blocking rollers 222 block the stones in the soil. The stone blocking rollers 222 are designed to rotate freely, so that the soil and smaller crushed stones can stably enter the soil drill 2, while the larger crushed stones will be blocked by the stone blocking rollers 222 and difficult to enter, thereby preventing the crushing The stone stuck in the bottom of the soil inlet 22 affects the subsequent soil drainage work. The crushed stone approaches the rear stone pushing inclined plate 23 as the stone blocking roller 222 rotates. The stone pushing inclined plate 23 rotates with the soil drilling knife 2, so that the stone pushing inclined plate 23 can guide and push the crushed stone, and the crushed stone is squeezed into the outer soil, so that the excess crushed stone can be directly pressed into the soil layer, avoiding secondary interference with subsequent work, which is beneficial to ensure the structural integrity of the soil sample, thereby ensuring the accuracy and reliability of the subsequent analysis and test results of the soil sample, and reducing the damage to the soil sample structure which will cause deviations in the analysis data.

[0030] Among them, a protective tube 24 is installed at the bottom end of the drilling knife 2, and four stone-pushing inclined plates 23 are all installed on the side walls of the protective tube 24. The drilling gear 31 does not contact the stone-pushing inclined plates 23 and the protective tube 24; the stone-pushing inclined plates 23 and the protective tube 24 are connected, and the crushed stones intercepted by the protective tube 24 and the stone-blocking roller 222 are directly guided to the position of the stone-pushing inclined plates 23, and the protective tube 24 wraps and protects the inner columnar soil sample, further reducing the influence of external factors on the soil sample structure.

[0031] Among them, the inner sides of the four curved side doors 21 are all provided with limit plugs 211, and four electrically-controlled telescopic rods 25 are installed on the top of the drilling knife 2, and the output ends of the four electrically-controlled telescopic rods 25 are all plugged into the inner walls of the corresponding limit plugs 211; the curved side doors 21 support the limit plugs 211, and the electrically-controlled telescopic rods 25 correspond to the positions of the limit plugs 211 in the vertical direction. When the curved side doors 21 are closed, the limit plugs 211 are transferred to the bottom of the electrically-controlled telescopic rods 25, and the electrically-controlled telescopic rods 25 are inserted into the limit plugs 211, completing the locking between the drilling knife 2 and the curved side doors 21, and preventing the curved side doors 21 from being accidentally opened when drilling.

[0032] Among them, four right-angle scrapers 4 are slidably connected to the inner wall of the drilling knife 2, and the first traction rope 41 and the second traction rope 42 are installed on both sides of the four right-angle scrapers 4. One end of the first traction rope 41 is installed on the inner side of the corresponding arc-shaped side door 21, and a reel 421 for storing the second traction rope 42 is installed on the inner wall of the drilling knife 2; when the arc-shaped side door 21 is opened, the soil inside the drilling knife 2 automatically falls off, and the drilling knife 2 completes the traction of the right-angle scraper 4 through the first traction rope 41, and the right-angle scraper 4 uses both sides to scrape the soil on the inner wall of the drilling knife 2, thereby improving the soil shedding effect of the drilling knife 2 and reducing residue, and when the right-angle scraper 4 moves, the compacted soil can achieve soil push and realize the natural peeling of the soil. When the arc-shaped side door 21 is closed, the reel 421 drives the reel rod through the internal spring to complete the automatic reeling and traction of the second traction rope 42, and pulls the right-angle scraper 4 to slide back.

[0033] Among them, an aisle ring 5 is installed on the inner wall of the top of the drilling knife 2, and limiting slide grooves 51 are provided on both sides of the aisle ring 5. A connecting groove 43 is provided on the top of the right-angle scraper 4, and the right-angle scraper 4 is slidably connected to the outside of the aisle ring 5 through the connecting groove 43 and the limiting slide groove 51; the drilling knife 2 is connected to the right-angle scraper 4 through the aisle ring 5, and the aisle ring 5 guides and limits the right-angle scraper 4 through the limiting slide groove 51 and the connecting groove 43 on the top of the right-angle scraper 4, so that the right-angle scraper 4 can slide stably according to the set route when sliding, preventing the right-angle scraper 4 from becoming loose or shifted.

[0034] Working principle:

[0035] When taking soil, the bottom of the soil drilling drive mechanism 15 rotates, and the internal gear set drives the rotating inner rod 3 and the rotating outer tube 32 to rotate, and the rotating outer tube 32 controls the opening and closing of the arc side door 21. The soil drilling knife 2 rotates with the rotating inner rod 3 and the soil drilling gear 31, and the soil drilling gear 31 rotates to crush the soil, so that the soil can flow into the soil drilling knife 2 through the soil inlet bottom 22. The inclined surface 221 on the soil inlet bottom 22 guides and cuts the soil to help it enter. For soil and stones, the stone blocking roller 222 rotates freely, and small crushed stones enter the soil drilling knife 2 with the soil, and large crushed stones are blocked outside the soil inlet bottom 22. The blocked crushed stones rotate to the stone pushing inclined plate 23 with the stone blocking roller 222, and the stone pushing inclined plate 23 rotates with the soil drilling knife 2 to squeeze the crushed stones to the outer soil. When discharging soil, the arc side door 21 is rotated outward, and the soil in the soil drilling knife 2 falls by gravity. The right-angle scraper 4 on the inner wall of the soil drilling knife 2 is pulled by the soil drilling knife 2, and the soil is scraped on both sides to reduce the residue. The arc side door 21 is closed, and the reel 421 in the soil drill 2 drives the reel rod with a spring to return the right-angle scraper 4. At the same time, the inner wall aisle ring 5 at the top of the soil drill 2 cooperates with the top connecting groove 43 of the right-angle scraper 4 to guide and limit the right-angle scraper 4 to prevent displacement.

Claims

1. A detachable deep soil sampling device, comprising a supporting main frame (1), two fixed track frames (11), a lifting track frame (12), two L-shaped connecting frames (13), a soil sampling tube (14) and a soil drilling drive mechanism (15), characterized in that: A soil drilling knife (2) is arranged at the bottom of the soil drilling drive mechanism (15), four connecting rods (151) are installed between the soil drilling drive mechanism (15) and the soil drilling knife (2), four arc-shaped side doors (21) are rotatably connected to the inner side of the soil drilling knife (2), the four arc-shaped side doors (21) are distributed in a circular array, the four arc-shaped side doors (21) all block the opening of the annular recessed area of ​​the soil drilling knife (2), four soil entry bottom openings (22) are opened at the bottom of the soil drilling knife (2), the four soil entry bottom openings (22) correspond to the positions of the four arc-shaped side doors (21) one by one, and the four soil entry bottom openings (22) are all provided with inclined surfaces (221), the angles of the inclined surfaces (221) are the same as those of the soil drilling knife (2). Corresponding to the rotation direction of the knife (2), the inner walls of the four soil inlet bottom openings (22) are rotatably connected to a plurality of stone blocking rollers (222), and the corresponding plurality of stone blocking rollers (222) are equidistantly distributed. The bottom end of the soil drilling knife (2) is equipped with four stone pushing inclined plates (23), and the positions of the four stone pushing inclined plates (23) and the four inclined surfaces (221) correspond one to one. Four rotating inner rods (3) are rotatably connected between the soil drilling drive mechanism (15) and the soil drilling knife (2), and the bottom ends of the four rotating inner rods (3) are equipped with soil drilling gears (31), and the side walls of the four soil drilling gears (31) are rotatably connected to rotating outer tubes (32), and the arc-shaped side door (21) is installed on the side wall of the rotating outer tube (32).

2. A detachable deep soil sampling device according to claim 1, characterized in that: A protective tube (24) is installed at the bottom end of the soil drilling knife (2), and the four stone pushing inclined plates (23) are all installed on the side walls of the protective tube (24). The soil drilling gear (31) is not in contact with the stone pushing inclined plates (23) and the protective tube (24).

3. A detachable deep soil sampling device according to claim 1, characterized in that: The inner sides of the four arc-shaped side doors (21) are all provided with limit inserts (211), the top of the soil drilling knife (2) is equipped with four electrically controlled telescopic rods (25), and the output ends of the four electrically controlled telescopic rods (25) are all plugged into the inner walls of the corresponding limit inserts (211).

4. A detachable deep soil sampling device according to claim 1, characterized in that: The inner wall of the soil drilling knife (2) is slidably connected to four right-angle scrapers (4), and a first traction rope (41) and a second traction rope (42) are installed on both sides of the four right-angle scrapers (4). One end of the first traction rope (41) is installed on the inner side of the corresponding arc-shaped side door (21), and a reel (421) for storing the second traction rope (42) is installed on the inner wall of the soil drilling knife (2).

5. A detachable deep soil sampling device according to claim 4, characterized in that: The inner wall at the top of the soil drilling knife (2) is provided with an aisle ring (5), and both sides of the aisle ring (5) are provided with limit slide grooves (51). The top of the right-angle scraper (4) is provided with a connecting groove (43), and the right-angle scraper (4) is slidably connected to the outer side of the aisle ring (5) through the connecting groove (43) and the limit slide groove (51).

6. A detachable deep soil sampling device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Soil sampling: The device adjusts the positions of the soil sampling tube (14) and the soil drilling drive mechanism (15) by means of a fixed track frame (11), a lifting track frame (12), and an L-shaped connecting frame (13). The soil drilling drive mechanism (15) drives the soil drilling knife (2) to move to the lifting track frame (12) area with the help of a connecting rod (151). The lifting track frame (12) descends, so that the soil drilling knife (2) cuts the soil in a circular manner to collect the soil, and the circular soil is collected. At this time, the four arc-shaped side doors (21) turn over and merge in the direction of the soil drilling knife (2), surrounding the soil sampling tube (2). A tight sealing structure is formed to stably retain the annular soil inside the soil drilling knife (2). The soil drilling gear (31) rotates to complete the crushing of the soil. The soil enters the soil drilling knife (2) through the soil inlet bottom (22). The inclined surface (221) guides and cuts the soil to facilitate its entry. The stone blocking roller (222) blocks larger crushed stones. Smaller crushed stones and soil enter the soil drilling knife (2). The larger crushed stones are blocked by the stone blocking roller (222) and move closer to the position of the stone pushing inclined plate (23) as it rotates. The stone pushing inclined plate (23) guides and pushes the crushed stones to squeeze the soil outside. S2, component locking: when the arc-shaped side door (21) is closed, the limit plug (211) inside the arc-shaped side door (21) is transferred to the position directly below the electric control telescopic rod (25) installed at the top of the soil drilling knife (2), and the output end of the electric control telescopic rod (25) is plugged into the inner wall of the corresponding limit plug (211), thereby completing the locking between the soil drilling knife (2) and the arc-shaped side door (21), ensuring that the arc-shaped side door (21) will not be accidentally opened during the soil drilling process; S3, soil discharge and cleaning: the arc-shaped side door (21) is rotated outward to open, and the soil inside the soil drill (2) automatically falls off. The soil drill (2) pulls the right-angle scraper (4) through the first traction rope (41), and the right-angle scraper (4) scrapes the soil on the inner wall of the soil drill (2) with both sides to achieve soil push, improve the soil shedding effect, and reduce residue. When the arc-shaped side door (21) is closed, the reel (421) on the inner wall of the soil drill (2) drives the reeling rod to automatically reel and pull the second traction rope (42) through the internal spring, and pulls the right-angle scraper (4) to slide back. The aisle ring (5) on the inner wall of the top of the soil drill (2) guides and limits the right-angle scraper (4) through the limiting slide groove (51) and the connecting groove (43) at the top of the right-angle scraper (4), so as to ensure the stable sliding of the right-angle scraper (4).

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