Cutting ring sampling device

Abstract

The invention discloses a cutting ring sampling device and belongs to the technical field of soil sampling, the cutting ring sampling device comprises a soil sampler and a thruster, the soil sampler comprises a cutting ring and a cutter handle, the cutter handle comprises a pressing rod, a first outer cylinder and a first sleeve which are integrally formed, and a stepped groove matched with the cutting ring is formed in the first sleeve; an annular groove and a plurality of clamping grooves are formed in the first sleeve, L-shaped clamping jaws are hinged into the clamping grooves, reserved grooves are formed in the front ends of the L-shaped clamping jaws, the first outer cylinder is sleeved with a traction piece in a sliding mode, the traction piece comprises a second sleeve, a pull rod and a traction ring are arranged at the two ends of the second sleeve respectively, and the traction ring is located in the reserved grooves. A push rod is arranged in the first outer cylinder in a penetrating mode, and a push head is arranged at the position, in the first sleeve, of the bottom end of the push rod, so that the problems that existing cutting ring sampling is inconvenient, an operator is prone to being scratched due to frequent contact with the cutting ring, and meanwhile the labor intensity is high during vertical face sampling are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of soil sampling, and in particular relates to a ring knife sampling device. Background Art

[0002] Ring knife sampling is a commonly used geotechnical test method, mainly used to determine the density and water content of soil. Through ring knife sampling, representative soil samples can be obtained for further physical and mechanical property analysis. The ring knife is a cylindrical metal container with openings at both ends and a smooth inner wall, which is convenient for the complete removal of soil samples. When sampling, first insert the ring knife vertically into the soil layer, and then use a special sampler to completely remove the soil sample in the ring knife. The removed soil sample must be weighed and measured immediately to calculate its density and water content. The accuracy of ring knife sampling directly affects the reliability of the test results. Therefore, the operating procedures must be strictly followed during the operation to ensure the integrity and representativeness of the soil sample.

[0003] However, currently most ring knife sampling requires using a hammer to hit the knife handle to nail the ring knife into the soil, and then using a shovel to scrape away the soil around the ring knife to take out the sample. Taking soil is a relatively troublesome operation, and when the ring knife is scraped out of the soil, it is easy to cause the soil at the bottom of the ring knife to be incomplete. The hole where the ring knife edge is lacking soil needs to be filled. During the filling process, the ring knife edge is frequently in contact with the ring knife edge and is easily scratched. When horizontal soil sampling is required, a sampling pit needs to be dug in the ground first, and then the ring knife is driven into the vertical surface of the pit wall of the sampling pit horizontally for sampling. However, since space is required when striking the knife handle, a sampling pit with a larger diameter is required, and the labor intensity is high. Summary of the invention

[0004] Based on the problems mentioned in the above background technology, the present invention provides a ring knife sampling device to solve the current problems that ring knife sampling is inconvenient, the operator is easily scratched due to frequent contact with the ring knife, and the labor intensity is high when sampling on the vertical surface.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A ring knife sampling device, including a soil sampler and a thruster, the soil sampler includes a ring knife and a knife handle, the knife handle includes an integrally formed pressure rod, a first outer cylinder and a first sleeve, a stepped groove matching the ring knife is provided in the first sleeve, an annular groove and a plurality of clamping grooves are provided on the first sleeve, an L-shaped clamping claw is hinged in the clamping groove, a reserved groove is provided at the front end of the L-shaped clamping claw, a traction member is provided on the outer sliding sleeve of the first outer cylinder, the traction member includes a second sleeve, a pull rod and a traction ring are provided at both ends of the second sleeve, the traction ring is located in the reserved groove, a push rod is passed through the first outer cylinder, and a push head is provided at the bottom end of the push rod in the first sleeve The thruster includes a base plate and a mounting frame, a U-shaped groove is provided on the base plate, a driving rod is slidably installed on the mounting frame, clamping teeth are provided on both sides of the driving rod, a limiting groove is provided in the middle of the driving rod, a top pressure clamping plate is installed at the bottom end of the driving rod, rack clamps are provided on both sides of the driving rod, a tension spring is connected between the two rack clamps, a limiting plate and a hook are provided on the rack clamp, the limiting plate and the tension spring are both located in the limiting groove, a spring is installed between the rack clamp and the mounting frame, the elastic force of the spring is greater than the elastic force of the tension spring, a rotating shaft is passed through the mounting frame, sleeves are installed at both ends of the rotating shaft, and a force rod is passed through the sleeve.

[0007] On the basis of the above technical solution, the present invention further makes the following improvements:

[0008] Furthermore, the tail ends of the two force-applying rods are sleeved with connecting blocks, and magnetic blocks are embedded in the connecting blocks. After the connecting blocks are sleeved on the two force-applying rods, the two force-applying rods can be operated synchronously, and the magnetic blocks can absorb the force-applying rods and prevent the force-applying rods from falling off during the operation.

[0009] Furthermore, the bottom of the bottom plate is provided with a plurality of inclined bevel teeth, which are all inclined toward the U-shaped groove. When sampling on a plane, the bevel teeth can stabilize the bottom plate, and at the same time, the front end of the bottom plate is not easy to bend up; when sampling on a vertical surface, the thruster placed on the sampling pit wall can prevent the bottom plate from sliding down along the pit wall through the bevel teeth.

[0010] Furthermore, an insert block is provided at the bottom of the mounting frame, and a T-shaped slot is provided at the top of the bottom plate, and the insert block is clamped in the T-shaped slot. The bottom plate and the mounting frame are detachable, and the mounting frame can be removed from the bottom plate and stacked during transportation and carrying, so as to avoid occupying a large space and facilitate use.

[0011] Furthermore, the ring knife sampling device also includes a soil planer, which includes a base ring, on which a plurality of spiral rods are installed at equal intervals, and a plowshare is installed at the bottom end of each spiral rod. After the ring knife is nailed into the soil, the base ring is sleeved on the outside of the ring knife, and the plowshare can be driven to rotate and gradually plow into the soil by rotating the base ring. The soil outside the ring knife is planed by the plowshare, which is convenient for taking out the ring knife inserted into the soil. The use is relatively convenient and can be applied to soil sampling on flat ground and vertical surfaces.

[0012] Furthermore, the soil scraper also includes a flange, the base ring is rotatably sleeved on the flange, the inner diameter of the flange is larger than the outer diameter of the ring cutter, an anti-drop buckle is provided at the bottom of the flange, two transmission rods are installed on the flange, and handles are installed on the transmission rods. Two slide grooves are provided at the top of the base ring, and the bottom ends of the two transmission rods are respectively located in the two slide grooves. By holding the handle to drive the base ring to rotate, the base ring can be more easily rotated during the soil scraping process, and the plowshare can be more easily plowed into the soil, which is more labor-saving when used.

[0013] Furthermore, the number of the spiral rods is an even number, and a threading channel is provided in any two of the spiral rods symmetrically along the axis of the base ring, and the top of the threading channel passes through the base ring and the bottom passes through the plowshare. The soil plow also includes a stranded wire, and the two ends of the stranded wire pass through the two spiral rods respectively and are fixedly connected to the two transmission rods respectively. The flange rotates along the direction of the plowshare so that the stranded wire is in a relaxed state when the transmission rod is located at the end of the slide groove. After the plowshare is plowed into a position deeper than the ring cutter, the stranded wire can be straightened by rotating the handle in the reverse direction, and then the stranded wire can be rotated in the straightened state to cut off the soil under the ring cutter as the base ring rotates in the reverse direction, so that the ring cutter and the soil sample can be easily taken out, and the soil cut cut by the stranded wire is relatively flush, so that there will be no large pit in the soil at the bottom of the ring cutter that needs to be filled after the soil sample is taken out. It is easy to use and avoids scratches caused by contact with the blade of the ring cutter due to filling the soil, so it is safer.

[0014] Furthermore, a conical shield is provided on the first sleeve. When the soil scraper is placed, the strands between the two plowshares can slide to the side of the ring cutter through the inclined surface of the conical shield, without the need to manually pull the strands; at the same time, the shielding effect of the conical shield can prevent soil from adhering to the top of the first sleeve and affecting the rotation of the L-shaped clamp in the slot.

[0015] Beneficial effects of the present invention:

[0016] 1. By rotating the force rod, the driving rod can be driven to gradually descend through the rack clamp, and the ring knife can be gradually pressed into the soil by squeezing the knife handle by the top pressure card. The operation is relatively labor-saving and convenient for outdoor soil taking;

[0017] 2. After inserting the force rod into the bottom of the sampling pit, hang the force rod directly on the hook. Using one end of the force rod inserted into the bottom of the sampling pit as a fulcrum, rotating the force rod can drive the rack clamp to move and make the ring knife stuck in the soil, so that it can be used for vertical horizontal soil sampling.

[0018] 3. After the force rod is rotated to press the rack clamp down and then lifted up, the rack clamp will be reset under the action of the spring, so that the force rod can be rotated repeatedly in a small range to gradually lower the driving rod, so that there is no need to dig a large sample pit when taking soil horizontally on the vertical surface, which can greatly reduce the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0020] Figure 1 It is a structural schematic diagram of a ring knife sampling device in an embodiment of the present invention;

[0021] Figure 2 The structure of the thruster in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 3 The structure of the thruster in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 4 Schematic diagram of the structure of the rack clamp in an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the cross-sectional structure of the rack clamp and the driving rod in the embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the soil extractor in the embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the longitudinal structure of the soil extractor in an embodiment of the present invention;

[0027] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at A in the middle;

[0028] Fig. 9 Schematic diagram of the longitudinal section structure of the knife handle in an embodiment of the present invention;

[0029] Fig.10 is a schematic diagram of the longitudinal section structure of the traction member in an embodiment of the present invention;

[0030] Fig.11 A schematic diagram of the structure of a soil scraper in an embodiment of the present invention;

[0031] Fig.12 for Fig.11 A schematic diagram of the enlarged structure at B in the middle;

[0032] Fig.13 It is a schematic diagram of the disassembled structure of the soil scraper in an embodiment of the present invention;

[0033] Fig.14 This is a schematic diagram of the use state of the soil scraper in the embodiment of the present invention;

[0034] The main component symbols are described as follows:

[0035] Ring knife 1, conical shield 10, bottom plate 21, T-shaped slot 211, bevel gear 212, mounting frame 22, plug block 221, U-shaped slot 23, drive rod 24, clamping tooth 241, limiting slot 242, rack clamp 25, limiting piece 251, hook 252, spring 253, tension spring 26, limiting block 261, threaded sleeve 263, screw 264, sleeve 27, rotating shaft 271, top pressure clamp 28, rotating shaft 281, force rod 29, connecting block 291, push rod 4, push head 41, knife handle 5, pressure rod 51, first outer tube 52, first sleeve 53, stepped groove 531, card groove 532, annular groove 533, L-shaped clamping claw 54, reserved groove 541, traction member 6, second sleeve 61, pull rod 62, traction ring 63, base ring 71, spiral rod 72, threading channel 721, plowshare 73, twisted wire 74, flange 75, anti-drop buckle 751, transmission rod 76, handle 77, slide groove 78. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] like Figure 6 to Figure 10 As shown, a ring knife sampling device includes a soil sampler and a thruster. The soil sampler includes a ring knife 1 and a knife handle 5. The knife handle 5 includes an integrally formed pressure rod 51, a first outer cylinder 52 and a first sleeve 53. A stepped groove 531 matching the ring knife 1 is provided in the first sleeve 53. After the first sleeve 53 is sleeved on the top of the ring knife 1, the ring knife 1 can be pressed into the soil by applying force to the pressure rod 51. An annular groove 533 and a plurality of clamping grooves 532 are provided on the first sleeve 53. An L-shaped clamping claw 54 is hinged in the clamping groove 532. A reserved groove 541 is provided at the front end of the L-shaped clamping claw 54. A traction member 6 is slidably sleeved on the outside of the first outer cylinder 52. The traction member 6 includes a second sleeve 61. A pull rod 62 and a traction ring 63 are provided at both ends of the second sleeve 61. The traction ring 63 is located in the reserved groove 541. A push rod 4 is inserted into the first outer tube 52, and a push head 41 is provided at the bottom end of the push rod 4 in the first sleeve 53. The pull rod 62 is pulled toward the pressure rod 51 to rotate the L-shaped clamp 54 to clamp the ring cutter 1 through the traction ring 63, and then the push rod 4 is moved to push the soil sample in the ring cutter 1 out through the push head 41.

[0038] like Figure 1 to Figure 5As shown, the thruster includes a bottom plate 21 and a mounting frame 22. A U-shaped groove 23 is provided on the bottom plate 21 for placing the ring cutter 1 when taking soil. A driving rod 24 is slidably mounted on the mounting frame 22. A clamping tooth 241 is provided on both sides of the driving rod 24. A limiting groove 242 is provided in the middle of the driving rod 24. A top pressure clamping plate 28 is installed at the bottom end of the driving rod 24. The top pressure clamping plate 28 is clamped on the outside of the push rod 4 above the pressure rod 51, so that the ring cutter 1 can be pushed to move and embed into the soil when the driving rod 24 is lowered. Rack clamps 25 are provided on both sides of the driving rod 24. The rack clamps 25 match the clamping teeth 241 on one side of the driving rod 24. After the rack clamps 25 are engaged with the clamping teeth 241 of the driving rod 24, the driving rod 24 can be pulled down. A tension spring 26 is connected between the two rack clamps 25. A limit plate 251 and a hook 252 are provided on the rack clamp 25. The limit plate 251 and the tension spring 26 are both located in the limit groove 242, wherein the two ends of the tension spring 26 are respectively connected to a limit block 261 and a threaded sleeve 263. After the tension spring 26 is inserted into the two rack clamps 25 and a screw 264 is installed in the threaded sleeve 263, the tension spring 26 can be installed between the two rack clamps 25. The two rack clamps 25 can be stabilized on the driving rod 24 by the tension spring 26 to prevent them from falling by themselves. A spring 253 is installed between the rack clamp 25 and the mounting frame 22. The elastic force of the spring 253 is greater than the elastic force of the tension spring 26. After the rack clamp 25 moves and compresses the spring 253, the rack clamp 25 can be returned to its original position under the action of the spring 253. Since the elastic force of the spring 253 is greater than the tension spring 26, the rack clamp 25 can be prevented from being tightly attached to the card tooth 241 and unable to move under the action of the tension spring 26. A rotating shaft 281 is passed through the mounting frame 22, and sleeves 27 are installed at both ends of the rotating shaft 271. A force rod 29 is passed through the sleeve 27.

[0039] Specifically, a connecting block 291 is sleeved on the tail end of the two force rods 29, and a magnetic block is embedded in the connecting block 291. After the connecting block 291 is sleeved on the two force rods 29, the two force rods 29 can be operated synchronously. At the same time, under the action of the magnetic block, the force rod 29 can be sucked and prevented from falling off by itself during the operation.

[0040] Specifically, a plurality of inclined bevel teeth 212 are provided at the bottom of the bottom plate 21, and the bevel teeth 212 are all inclined toward the U-shaped groove 23. When sampling is performed on a plane, the bevel teeth 212 can stabilize the bottom plate 21, and at the same time, the front end of the bottom plate 21 is not easily warped up; when sampling is performed on a vertical surface, a thruster placed on the wall of the sampling pit can prevent the bottom plate 21 from sliding down along the pit wall through the bevel teeth 212.

[0041] Specifically, an insert block 221 is provided at the bottom of the mounting frame 22, and a T-shaped slot 211 is provided at the top of the bottom plate 21, and the insert block 221 is clamped in the T-shaped slot 211. The bottom plate 21 and the mounting frame 22 are detachable, and the mounting frame 22 can be removed from the bottom plate 21 and stacked during transportation and carrying, so as to avoid occupying a large space and facilitate use.

[0042] like Figure 11 to Figure 14 As shown, the ring knife sampling device also includes a soil plow, which includes a base ring 71, on which a plurality of spiral rods 72 are installed at equal intervals, and a plowshare 73 is installed at the bottom end of each spiral rod 72. After the ring knife 1 is nailed into the soil, the base ring 71 is sleeved on the outside of the ring knife 1, and the plowshare 73 can be driven to rotate and gradually plow into the soil by rotating the base ring 71. The soil outside the ring knife 1 is plowed open by rotating the plowshare 73, so that the ring knife inserted into the soil can be easily taken out. The use is relatively convenient and can be applied to soil taking on flat ground and vertical surfaces.

[0043] Specifically, the scraper also includes a flange 75, and a base ring 71 is rotatably mounted on the flange 75. The inner diameter of the flange 75 is larger than the outer diameter of the ring knife 1. An anti-drop buckle 751 is provided at the bottom of the flange 75. Two transmission rods 76 are installed on the flange 75, and handles 77 are installed on the transmission rods 76. Two slide grooves 78 are provided at the top of the base ring 71, and the bottom ends of the two transmission rods 76 are respectively located in the two slide grooves 78. By holding the handle 77 to drive the base ring 71 to rotate, the base ring 71 can be more easily rotated during the scraping process, and the plowshare 73 can be more easily plowed into the soil, which is more labor-saving when used.

[0044] Specifically, the number of the spiral rods 72 is an even number, and a threading channel 721 is opened in any two spiral rods 72 symmetrically along the axis of the base ring 71. The top end of the threading channel 721 passes through the base ring 71, and the bottom end passes through the plowshare 73. The plowshare also includes a stranded wire 74, and the two ends of the stranded wire 74 pass through the two spiral rods 72 respectively and are fixedly connected to the two transmission rods 76 respectively. The flange 75 rotates along the direction of the plowshare 73 so that the stranded wire 74 is in a relaxed state when the transmission rod 76 is located at the end of the slide groove 78. After the plowshare 73 is plowed deeper than the ring cutter 1, the handle 77 can be rotated in the reverse direction to straighten the strands 74, and then the strands 74 can be rotated in the straightened state as the base ring 71 rotates in the reverse direction to cut the soil below the ring cutter 1, so that the ring cutter 1 and the soil sample can be easily taken out. At the same time, the soil incision cut by the strands 74 is relatively flat, and there will be no large holes in the soil at the bottom of the ring cutter 1 that need to be filled after the soil sample is taken out. It is easy to use and avoids scratches caused by contact with the blade of the ring cutter 1 due to filling of soil, so it is safer.

[0045] Specifically, a conical shield 10 is sleeved on the first sleeve 53. When the plowshare is placed, the stranded wire 74 between the two plowshares 73 can slide to the side of the ring knife 1 through the inclined surface of the conical shield 10 without manually pulling the stranded wire 74. At the same time, the shielding effect of the conical shield 10 can prevent soil from adhering to the top of the first sleeve 53 and affecting the rotation of the L-shaped clamp 54 in the slot 532.

[0046] When sampling on a flat surface, place the soil sampler on the flat soil, then place the thruster on one side of the soil sampler so that the ring cutter 1 is located in the U-shaped groove 23 of the bottom plate 21, and at the same time, clamp the top pressure clamping plate 28 on the outside of the push rod 4 above the pressure rod 51, insert the force rod into the sleeve 27 and press it down reciprocatingly. When the sleeve 27 is pressed down, the rack clamp 25 drives the driving rod 24 to descend and nail the ring cutter 1 into the soil. When the ring cutter 1 is completely nailed into the soil, remove the thruster and cover the soil slicer on the outside of the soil sampler (such as Fig.14 As shown), the handle 77 is rotated counterclockwise to make the transmission rod 76 located at one end of the slide slot 78, thereby driving the base ring 71 to rotate. During this process, the strand 74 is in a relaxed state. As the base ring 71 rotates, the plowshare 73 can be driven by the spiral rod 72 to move and embed into the soil. As the plowshare 73 moves around the outside of the ring cutter 1, the soil around the ring cutter 1 can be loosened. When the base ring 71 contacts the ground, the plowshare 73 moves to the bottom of the ring cutter 1. At this time, the handle 77 is rotated in the opposite direction to gradually tighten and rotate the strand 74. As the tightened strand 74 rotates, the soil under the ring cutter 1 can be cut off. Then, the pull rod 62 and the pressure rod 51 are held to lift the traction ring 63 up. The L-shaped clamp 54 can clamp the ring cutter 1 to remove it. Finally, the excess soil at both ends of the ring cutter 1 is cut off and re-inserted into the first sleeve 53 for clamping. The push rod 4 is moved to push the soil sample in the ring cutter 1 through the push head 41. Since the ring cutter 1 can be clamped in the first sleeve 53 and wirelessly handheld, frequent contact between the operator's hand and the ring cutter 1 can be avoided.

[0047] When sampling on the vertical surface, place the soil sampler and thruster on the wall of the excavated sampling pit, insert the conical teeth 212 on the thruster into the pit wall to prevent it from sliding down, then insert one end of the force rod 29 directly into the bottom of the pit and put the rod body into the hook 252, and then pull the force rod 29 to pull the rack clamp 25 to move the ring knife 1 to nail the ring knife 1 into the pit wall, and then refer to the operation method of taking soil on flat ground to take out the ring knife 1 and the soil sample in the ring knife 1 in turn.

[0048] The above is a detailed introduction to a ring knife sampling device provided by the present invention. The description of the specific embodiment is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A ring knife sampling device, comprising a soil sampler and a thruster, wherein the soil sampler comprises a ring knife (1) and a knife handle (5), the knife handle (5) comprises an integrally formed pressure rod (51), a first outer cylinder (52) and a first sleeve (53), and a stepped groove (531) matching the ring knife (1) is provided in the first sleeve (53), characterized in that: The first sleeve (53) is provided with an annular groove (533) and a plurality of clamping grooves (532), an L-shaped clamping claw (54) is hinged in the clamping groove (532), and a reserved groove (541) is provided at the front end of the L-shaped clamping claw (54). A traction member (6) is slidably sleeved on the outside of the first outer cylinder (52), and the traction member (6) comprises a second sleeve (61), and a pull rod (62) and a traction ring (63) are respectively provided at both ends of the second sleeve (61), and the traction ring (63) is located in the reserved groove (541). A push rod (4) is inserted into the first outer cylinder (52), and a push head (41) is provided at the bottom end of the push rod (4) in the first sleeve (53). The thruster comprises a bottom plate (21) and a mounting frame (22), and a U-shaped groove (23) is provided on the bottom plate (21), and a driving rod (24) is slidably mounted on the mounting frame (22). The driving rod (24) is provided with latch teeth (241) on both sides, a limiting groove (242) is provided in the middle of the driving rod (24), a top pressing plate (28) is installed at the bottom end of the driving rod (24), rack clamps (25) are provided on both sides of the driving rod (24), a tension spring (26) is connected between the two rack clamps (25), and a limiting sheet (251) and a hook (252) are provided on the rack clamp (25), the The limiting plate (251) and the tension spring (26) are both located in the limiting groove (242); a spring (253) is installed between the rack clamp (25) and the mounting frame (22); the elastic force of the spring (253) is greater than the elastic force of the tension spring (26); a rotating shaft (281) is passed through the mounting frame (22); sleeves (27) are installed at both ends of the rotating shaft (271); and a force rod (29) is passed through the sleeve (27).

2. A ring knife sampling device according to claim 1, characterized in that: The tail ends of the two force-applying rods (29) are sleeved with connecting blocks (291), and a magnetic block is embedded in the connecting block (291).

3. A ring knife sampling device according to claim 2, characterized in that: A plurality of inclined bevel teeth (212) are provided at the bottom of the bottom plate (21), and the bevel teeth (212) are all inclined towards the direction of the U-shaped groove (23).

4. A ring knife sampling device according to claim 3, characterized in that: An insert block (221) is provided at the bottom end of the mounting frame (22), a T-shaped slot (211) is provided at the top of the bottom plate (21), and the insert block (221) is clamped in the T-shaped slot (211).

5. The ring knife sampling device according to claim 1, characterized in that: The ring knife sampling device also includes a soil plow, which includes a base ring (71), a plurality of spiral rods (72) are installed on the base ring (71) at equal intervals, and a plowshare (73) is installed at the bottom end of each spiral rod (72).

6. A ring knife sampling device according to claim 5, characterized in that: The soil scraper also includes a flange (75), the base ring (71) is rotatably sleeved on the flange (75), the inner diameter of the flange (75) is larger than the outer diameter of the ring knife (1), an anti-drop buckle (751) is provided at the bottom of the flange (75), two transmission rods (76) are installed on the flange (75), and handles (77) are installed on the transmission rods (76), and two slide grooves (78) are provided at the top of the base ring (71), and the bottom ends of the two transmission rods (76) are respectively located in the two slide grooves (78).

7. A ring knife sampling device according to claim 6, characterized in that: The number of the spiral rods (72) is an even number. Any two of the spiral rods (72) symmetrically arranged along the axis of the base ring (71) are provided with threading channels (721). The top end of the threading channel (721) passes through the base ring (71) and the bottom end passes through the plowshare (73). The soil plow also includes a stranded wire (74). The two ends of the stranded wire (74) respectively pass through the two spiral rods (72) and are respectively fixedly connected to the two transmission rods (76). The flange (75) is rotated in the direction of the plowshare (73) so that the stranded wire (74) is in a relaxed state when the transmission rod (76) is located at the end of the slide groove (78).

8. A ring knife sampling device according to claim 7, characterized in that: The first sleeve (53) is sleeved with a conical protective cover (10).

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