Sandy soil sample depth collection equipment

Abstract

The invention discloses sandy soil sample depth collection equipment, and relates to the technical field of soil sampling. The device comprises a drilling barrel, the outer surface of the drilling barrel is provided with threads, the outer side face of the drilling barrel is rotationally connected with the inner side face of a top plate, the drilling barrel is arranged at the center of the top plate, a driving assembly is fixedly connected to the top plate, and the output end of the driving assembly is fixedly connected with the end, away from a base, of the drilling barrel; the four positioning insertion rods are arranged at the four corners of the top plate and slightly longer than the drilling barrel, the sampling assembly is fixedly connected into the drilling barrel, the side, close to the base, of the sampling assembly extends out of the drilling barrel, and the four positioning insertion rods conduct positioning before drilling of the drilling barrel, so that the base is firmly fixed to sandy soil with the high sand content. The base is prevented from sliding or inclining due to factors such as vibration of the driving assembly, the accuracy of the acquisition position and the acquisition depth is prevented from being influenced, and a more accurate acquisition effect is obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil sampling, in particular to a sandy soil sample depth collection device. BACKGROUND

[0002] Sandy soil sampling is a process of obtaining sandy soil samples for related research or analysis, usually using professional sampling tools such as soil drills, tube samplers, etc. Before sampling, the sampling site and quantity need to be determined according to the research purpose, and a representative area is generally selected. When sampling, the tool is vertically inserted into the sandy soil, and the soil sample is obtained after reaching a certain depth. In order to ensure the accuracy and reliability of the sample, multiple sampling points are mixed into a comprehensive sample, and the sampling site, depth, time, etc. are recorded for subsequent analysis and research to understand the physical and chemical properties of sandy soil and provide data support for agricultural production, land planning, and ecological environment research.

[0003] The existing sampling device is prone to contamination of the sample by other soil layers when collecting soil at a certain depth, affecting the accuracy and reliability of the sample. In addition, sandy soil has high sand content and loose soil, which is prone to tilting or even sliding when erecting the collection device, which can affect the accuracy of the sampling depth and the accuracy of the sampling location. Therefore, we propose a sandy soil sample depth collection device. SUMMARY

[0004] To solve the above technical problems, the present application provides a sandy soil sample depth collection device, comprising:

[0005] A base is provided above the base, and a top plate is provided above the base.

[0006] The bottom of the base is fixedly connected with a collection mechanism, and the side away from the base of the collection mechanism is fixedly connected with the top plate.

[0007] The collection mechanism comprises:

[0008] A drill cylinder is provided on the outer surface of the drill cylinder, and the outer side of the drill cylinder is rotatably connected with the inner side of the top plate. The drill cylinder is arranged at the center of the top plate.

[0009] A drive assembly is fixedly connected to the top plate, and the output end of the drive assembly is fixedly connected to the end of the drill cylinder away from the base.

[0010] A positioning plug rod is rotatably connected to the inner side of the top plate, and four positioning plug rods are arranged at the four corners of the top plate. The length of the positioning plug rod is slightly longer than that of the drill cylinder.

[0011] A sampling assembly is fixedly connected inside the drill cylinder, and the side close to the base of the sampling assembly extends to the outside of the drill cylinder.

[0012] When collecting, first move the equipment to the collection position, start the drive assembly, the drive assembly drives the top plate to descend, the positioning rod is inserted into the soil, and the drill barrel stops after it is close to the ground. The drive assembly drives the positioning rod and the drill barrel to rotate, and stops above the collection position. The sampling assembly extends from the end of the drill barrel and is inserted into the deep soil. The soil enters the sampling assembly, and then the sampling assembly returns to the drill barrel to complete the sampling collection. The drill barrel and the positioning rod are rotated to insert into the soil, which can be more easily inserted into the soil to achieve deep collection. While rotating and inserting, hard impurities such as stones on the ground can also be removed to avoid obstruction to drilling. The setting of four positioning rods can be used for positioning before the drill barrel drills, and the base is firmly fixed on sandy soil with a high sand content to prevent the base from sliding or tilting due to factors such as the vibration of the drive assembly, thereby avoiding affecting the accuracy of the collection position and collection depth, and obtaining a more accurate collection effect.

[0013] Furthermore, a fin is fixedly connected to the outer side surface of the positioning rod, and the fin is arranged in a triangular prism shape, and the end of the fin close to the base is provided with a slope. There are a plurality of fins, and the plurality of fins are evenly distributed along the circumference of the positioning rod. The fins with a slope and a triangular prism shape have a smaller contact area with the soil in the initial stage of insertion and can be inserted more smoothly. When the positioning rod is inserted into the soil for positioning, the fins can increase the resistance between the fins and the soil, thereby obtaining a better positioning effect. When sampling while drilling with the drill barrel, the intervals between the plurality of fins can discharge the soil, thereby reducing the drilling resistance and obtaining a better drilling effect.

[0014] Furthermore, the driving assembly includes a lifting rod, which is embedded in the top of the base, and the outer side of the lifting rod is fixedly connected to the inner side of the base. The output end of the lifting rod is located at the top of the base, and the side of the lifting rod away from the base is fixedly connected to the inner side of the top plate. There are four lifting rods, and the four lifting rods are respectively arranged at the intervals of four positioning rods. When the lifting rod is started, the output end of the lifting rod drives the top plate to rise and fall, and the lifting of the top plate drives the positioning rod and the drill barrel to rise and fall synchronously, thereby completing the insertion of the positioning rod into the soil for positioning and the synchronous drilling of the positioning rod and the drill barrel.

[0015] Furthermore, a shield is fixedly connected to the top of the top plate, the positioning rod and the drill barrel extend into the inside of the shield, and the surfaces of the positioning rod and the drill barrel are rotatably connected to the inner side of the shield, and the shield is used to protect the transmission parts of the drive assembly.

[0016] Further, the drill cylinder is fixedly connected with a driving gear at one end inside the shield, and the driving gear is engaged with four driven gear rings at the outside thereof, and the four driven gear rings are fixedly connected with the four positioning rods at the inside thereof, and the driving gear is driven to rotate to drive the drill cylinder to rotate to complete the drilling of the soil layer, and the four driven gear rings are driven to rotate to drive the positioning rods to rotate to complete the drilling of the soil layer.

[0017] Further, the driving gear is fixedly connected with a rotating shaft at the side away from the drill cylinder, the rotating shaft is fixedly connected with a motor at the side away from the driving gear, and the output end of the motor is fixedly connected with the rotating shaft, and the outside of the motor is fixedly connected with the inside bottom of the shield, and the motor is started to drive the output end of the motor to rotate the rotating shaft to drive the driving gear to rotate.

[0018] Further, the sampling assembly comprises an outer telescopic rod, which is fixedly connected with the inside top of the drill cylinder, and the outer telescopic rod is fixedly connected with a lining cylinder at one end close to the base, and the side close to the base of the lining cylinder is provided with a chamfer, and the chamfer of the lining cylinder is provided at the side away from the center thereof, and the outer telescopic rod is started to drive the lining cylinder to move, and the lining cylinder is extended out of the drill cylinder to be inserted into the soil to be sampled, and then the outer telescopic rod is reset, and the lining cylinder carries the soil back to the inside of the drill cylinder, and the lining cylinder is only extended out when it reaches above the sampling position, and is returned to the inside of the drill cylinder after the sampling is completed, and the lining cylinder will not contact other soil layers when drilling and returning, and the lining cylinder will not be contaminated before sampling, and the soil collected is protected when the drill cylinder returns to avoid contamination.

[0019] Further, the drill cylinder is provided with a ring plate at one end close to the base, the outside of the ring plate is slidably connected with the inside of the drill cylinder, the inside of the ring plate is slidably connected with the inside and outside of the lining cylinder, a spring is arranged at the interval between the drill cylinder and the lining cylinder, the spring is fixedly connected at the side of the ring plate away from the base, the end of the spring away from the ring plate is fixedly connected with the outside of the lining cylinder, the inside top of the lining cylinder is fixedly connected with an inner telescopic rod, and one end of the inner telescopic rod close to the base is fixedly connected with the side of the ring plate away from the base, and the outer telescopic rod drives the lining cylinder and the inner telescopic rod to be close to the position to be sampled, and the inner telescopic rod is retracted to drive the ring plate to be maintained at the end of the drill cylinder, so that the ring plate always blocks between the drill cylinder and the lining cylinder before and during sampling, and the soil is prevented from entering the interval between the drill cylinder and the lining cylinder, and the sampling soil is prevented from being contaminated when drilling and returning, and after the sampling is completed, the drill cylinder is rotated by a certain angle to drive the lining cylinder to rotate to break the soil column, and then the outer telescopic rod is reset to drive the lining cylinder, the inner telescopic rod and the ring plate to enter the inside of the drill cylinder to protect the collected soil column, and after the drill cylinder returns to the ground, the lifting rod is elongated to start the inner telescopic rod, the inner telescopic rod is elongated to drive the ring plate to move to eject the soil column from the lining cylinder to complete the collection of the sampling soil column.

[0020] Further, an end of the ring plate close to the base is provided with a groove, a cross section of the groove is provided as an isosceles trapezoid, a side close to the base of the groove is larger in diameter, and the diameter of the side close to the base of the groove is the same as that of the lining cylinder; when the soil column is ejected, the edge of the groove will scratch the inner side of the lining cylinder, so that the cleaning is completed at the same time of ejecting the soil column, and the mutual pollution of samples in continuous sampling is avoided.

[0021] Further, the inner side of the groove is fixedly connected with a block at the top, the block is provided as a claw, the bending direction of the block is the same as the rotating direction of the drill cylinder, the blocks are concentrically distributed in groups, and each group of blocks is uniformly distributed by a plurality of blocks along the circumferential direction of the ring plate; when drilling, the blocks in the same direction as the rotating direction of the drill cylinder are bent to scatter the soil, so that the soil is easily discharged by the thread of the drill cylinder; after stopping drilling, the blocks are embedded in the inside of the soil to be sampled, so that the connecting strength between the lining cylinder and the soil column is increased, the soil column is prevented from sliding before being ejected, and the failure of sampling is avoided; and the plurality of circumferentially distributed blocks can further increase the connecting strength.

[0022] The present application has the beneficial effects:

[0023] 1. The present application is provided with the drill cylinder, the drill cylinder and the positioning rod are inserted into the soil in rotation, so that the soil can be more easily inserted, the depth collection is achieved, the hard impurities such as stones on the ground can be removed at the same time of rotating insertion, the drilling is prevented from being hindered, and the lining cylinder is returned to the inside of the drill cylinder after sampling, so that the lining cylinder is not contacted with other soil layers during drilling and returning, the pollution of the lining cylinder before sampling is prevented, the collected soil is protected during returning of the drill cylinder, and the pollution of the soil is avoided.

[0024] 2. The present application is provided with the positioning rod, the four positioning rods can be positioned before the drill cylinder is drilled, so that the base is firmly fixed on the sandy soil with high sand content, the base is prevented from sliding or tilting due to vibration of the driving assembly, the accuracy of the collection position and the collection depth is prevented from being affected, and more accurate collection effect is obtained; the fins with the slope and the three-prism shape have smaller contact area with the soil at the initial insertion stage, so that the fins can be more smoothly inserted; the fins can increase the resistance between the fins and the soil during insertion of the positioning rod into the soil, so that better positioning effect is obtained; during drilling and sampling of the drill cylinder, the soil can be discharged at the intervals of the fins, the drilling resistance is reduced, and better drilling effect is obtained.

[0025] 3. The present application is provided with the ring plate, the ring plate is always shielded between the drill cylinder and the lining cylinder before and during sampling, so that the soil is prevented from entering the interval between the drill cylinder and the lining cylinder, and the sampling soil is prevented from being polluted during drilling and returning; when the soil column is ejected, the edge of the groove will scratch the inner side of the lining cylinder, so that the cleaning is completed at the same time of ejecting the soil column, and the mutual pollution of samples in continuous sampling is avoided.

[0026] 4、The present application is provided with a block, when drilling, the block is bent in the same direction as the rotation direction of the drill cylinder to stir the soil, the thread of the drill cylinder can conveniently discharge the soil, after stopping drilling, the block is embedded in the inside of the soil to be sampled, the connection strength between the liner and the soil column is increased, the soil column is prevented from sliding before being ejected, and sampling failure is avoided, and a plurality of circumferentially distributed blocks can further increase the connection strength. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic view of the sandy soil sample depth collection device of the present application;

[0028] Figure 2 It is another view of the structure schematic view of the sandy soil sample depth collection device of the present application;

[0029] Figure 3 It is a structure schematic view of the positioning rod of the present application;

[0030] Figure 4 It is a structure schematic view of the driving assembly of the present application;

[0031] Figure 5 It is a structure schematic view of the inside of the shield of the present application;

[0032] Figure 6 It is a structure schematic view of the cross section of the drill cylinder of the present application;

[0033] Figure 7 It is a structure schematic view of the liner of the present application;

[0034] Figure 8 It is a structure schematic view of the ring plate of the present application.

[0035] In the figure: 1, base; 2, top plate; 3, collection mechanism; 31, drill cylinder; 32, driving assembly; 321, lifting rod; 322, shield; 323, driving tooth; 324, driven tooth ring; 325, motor; 326, rotating shaft; 33, positioning rod; 34, fin; 35, sampling assembly; 351, outer telescopic rod; 352, liner; 353, ring plate; 354, spring; 355, inner telescopic rod; 356, groove; 357, block. DETAILED DESCRIPTION

[0036] The present application will be further described below in conjunction with the drawings and specific embodiments. The embodiments of the present application are given for the purpose of illustration and description, and are not exhaustive or limit the present application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the present application and its practical application, and to enable those of ordinary skill in the art to understand the present application in order to design various embodiments with various modifications for specific use.

[0037] Embodiment 1, please refer to Figures 1-5 The utility model provides a sandy soil sample depth collection equipment, it includes:

[0038] The base 1 is provided with the top plate 2 in the upside of base 1;

[0039] The base 1 top fixedly connected with collection mechanism 3, collection mechanism 3 is away from the side of base 1 with top plate 2 fixedly connected;

[0040] Among them, collection mechanism 3 includes:

[0041] Drill cylinder 31, the outer surface of drill cylinder 31 is provided with screw threads, and the outer side of drill cylinder 31 is rotatably connected with the inner side of top plate 2, and drill cylinder 31 is arranged at the center of top plate 2;

[0042] Drive assembly 32 is fixedly connected on top plate 2, and the output end of drive assembly 32 is fixedly connected with the end of drill cylinder 31 away from base 1;

[0043] Positioning insertion rod 33 is rotatably connected with the inner side of top plate 2 on the surface, and four positioning insertion rods 33 are arranged at the four corners of top plate 2, and the length of positioning insertion rod 33 is slightly longer than that of drill cylinder 31;

[0044] Sampling assembly 35 is fixedly connected inside drill cylinder 31, and the side close to base 1 of sampling assembly 35 extends to the outside of drill cylinder 31;

[0045] When collecting, first, the equipment is transported to the position to be collected, drive assembly 32 is started, drive assembly 32 drives top plate 2 to descend, positioning insertion rod 33 is inserted into the soil, and drive assembly 32 drives positioning insertion rod 33 and drill cylinder 31 to rotate when drill cylinder 31 is close to the ground, stops above the collection position, sampling assembly 35 extends from the end of drill cylinder 31 and is inserted into the deep soil, the soil enters the inside of sampling assembly 35, then sampling assembly 35 returns to the inside of drill cylinder 31, and the sampling and collection are completed, drill cylinder 31 and positioning insertion rod 33 are inserted into the soil while rotating, which can more easily insert into the soil and achieve depth collection, and the hard impurities such as stones on the ground can be removed while rotating and inserting, so as to avoid hindering the drilling, the four positioning insertion rods 33 can be positioned before drill cylinder 31 drills, and the base is firmly fixed on the sandy soil with high sand content, so as to avoid the sliding or tilting of base 1 due to the vibration of drive assembly 32 and other factors, avoid affecting the accuracy of the collection position and the collection depth, and obtain more accurate collection effect.

[0046] The outer side of the positioning insertion rod 33 is fixedly connected with fins 34, the fins 34 are arranged in a shape of a triangular prism, one end of the fins 34 close to the base 1 is provided with a slope, the fins 34 are arranged in a plurality of numbers, and the plurality of fins 34 are uniformly distributed along the circumference of the positioning insertion rod 33, the fins 34 with the slope and the shape of the triangular prism have a smaller contact area with the soil in the initial insertion stage, and can be more smoothly inserted, the fins 34 can increase the resistance between the fins 34 and the soil when the positioning insertion rod 33 is inserted into the soil for positioning, and better positioning effect is obtained, when the drilling cylinder 31 drills and samples, the intervals between the plurality of fins 34 can discharge the soil, the drilling resistance is reduced, and better drilling effect is obtained.

[0047] The driving assembly 32 comprises lifting rods 321, the lifting rods 321 are inlaid on the top of the base 1, the outer side of the lifting rods 321 is fixedly connected with the inner side of the base 1, the output end of the lifting rods 321 is located on the top of the base 1, and the side, away from the base 1, of the lifting rods 321 is fixedly connected with the inner side of the top plate 2, the lifting rods 321 are arranged in four numbers, and the four lifting rods 321 are arranged at the intervals of the four positioning insertion rods 33 respectively, the lifting rods 321 are started, the output end of the lifting rods 321 drives the top plate 2 to lift, the top plate 2 lifting drives the positioning insertion rod 33 and the drilling cylinder 31 to lift synchronously, and the positioning insertion rod 33 is inserted into the soil for positioning and the positioning insertion rod 33 and the drilling cylinder 31 are drilled synchronously in turn.

[0048] The top of the top plate 2 is fixedly connected with a protective cover 322, the positioning insertion rod 33 and the drilling cylinder 31 extend into the protective cover 322, and the surfaces of the positioning insertion rod 33 and the drilling cylinder 31 are rotatably connected with the inner side of the protective cover 322, and the protective cover 322 is used for protecting the transmission parts of the driving assembly 32.

[0049] The end, located in the protective cover 322, of the drilling cylinder 31 is fixedly connected with a driving gear 323, the driving gear 323 is arranged at the center of the drilling cylinder 31, the outer side of the driving gear 323 is meshingly connected with driven gear rings 324, the driven gear rings 324 are arranged in four numbers, and the inner sides of the four driven gear rings 324 are fixedly connected with the surfaces of the four positioning insertion rods 33 respectively, the driving gear 323 is driven to rotate, drives the drilling cylinder 31 to rotate, completes the drilling of the soil layer, and simultaneously drives the four driven gear rings 324 meshing with the driving gear 323 to rotate, drives the positioning insertion rod 33 to rotate, and completes the drilling of the soil layer.

[0050] The side, away from the drilling cylinder 31, of the driving gear 323 is fixedly connected with a rotating shaft 326, the side, away from the driving gear 323, of the rotating shaft 326 is fixedly connected with a motor 325, the output end of the motor 325 is fixedly connected with the rotating shaft 326, and the outer side of the motor 325 is fixedly connected with the bottom of the inner side of the protective cover 322, the motor 325 is started, the output end of the motor 325 drives the rotating shaft 326 to rotate, and drives the driving gear 323 to rotate.

[0051] Embodiment 2, please refer toFigures 1-8 The sampling assembly 35 comprises an outer telescopic rod 351 fixedly connected to the inner top of the drill cylinder 31, and an inner telescopic rod 355 fixedly connected to the inner top of the liner cylinder 352.

[0052] The drill cylinder 31 is provided with a ring plate 353 at one end close to the base 1, the outer side of the ring plate 353 is in sliding connection with the inner side of the drill cylinder 31, the inner side of the ring plate 353 is in sliding connection with the inner and outer sides of the liner cylinder 352, a spring 354 is arranged at the interval between the drill cylinder 31 and the liner cylinder 352, the spring 354 is fixedly connected to the side of the ring plate 353 away from the base 1, and the end of the spring 354 away from the ring plate 353 is fixedly connected to the outer side of the liner cylinder 352.

[0053] The ring plate 353 is provided with a groove 356 at one end close to the base 1, the cross section of the groove 356 is in the shape of an isosceles trapezoid, the diameter of the side of the groove 356 close to the base 1 is larger, and the diameter of the side of the groove 356 close to the base 1 is the same as the diameter of the liner cylinder 352.

[0054] The inner side of the groove body 356 is fixedly connected with a block body 357, the block body 357 is arranged in a claw shape, the bending direction of the block body 357 is the same as the rotating direction of the drill cylinder 31, the block body 357 is concentrically distributed in groups, and each group of block bodies 357 is uniformly distributed along the circumference of the ring plate 353. During drilling, the block body 357 bends in the same direction as the rotating direction of the drill cylinder 31 to stir the soil, facilitating the screw thread of the drill cylinder 31 to discharge the soil. After stopping drilling, the block body 357 is embedded in the inside of the soil to be sampled, increasing the connection strength between the lining cylinder 352 and the soil column, avoiding the soil column from sliding before being ejected, and avoiding causing sampling failure. The several circumferentially distributed block bodies 357 can further increase the connection strength.

[0055] In use, during collection, first, the device is carried to the position to be collected, the lifting rod 321 is started, the output end of the lifting rod 321 drives the top plate 2 to lift, the top plate 2 lifting drives the positioning insertion rod 33 and the drill cylinder 31 to synchronously lift, the positioning insertion rod 33 is inserted into the inside of the soil, and the drill cylinder 31 is stopped after approaching the ground, completing the positioning of the device. The motor 325 is started, the output end of the motor 325 drives the rotating shaft 326 to rotate, drives the driving gear 323 to rotate, drives the drill cylinder 31 to rotate, completes the drilling of the soil layer, simultaneously drives the four driven gear rings 324 meshing with the driving gear 323 to rotate, drives the positioning insertion rod 33 to rotate, completes the drilling of the soil layer, stops above the collection position, the motor 325 is turned off, the outer telescopic rod 351 is started, the outer telescopic rod 351 drives the lining cylinder 352 to move, the lining cylinder 352 extends out of the drill cylinder 31, is inserted into the soil to be sampled, and completely encloses the soil to be sampled into the inside of the lining cylinder 352. The inner telescopic rod 355 is retracted, drives the ring plate 353 to be maintained at the end of the drill cylinder 31. After collection is completed, the motor 325 is started again, the output end of the motor 325 drives the rotating shaft 326 to rotate, drives the driving gear 323 to rotate, drives the drill cylinder 31 to rotate, the drill cylinder 31 rotates by a certain angle, drives the lining cylinder 352 to rotate, and twists the soil column. Subsequently, the outer telescopic rod 351 is reset, drives the lining cylinder 352, the inner telescopic rod 355 and the ring plate 353 to enter the inside of the drill cylinder 31. After the drill cylinder 31 returns to the ground, the lifting rod 321 is elongated, the inner telescopic rod 355 is started, the inner telescopic rod 355 is elongated, drives the ring plate 353 to move, and the soil column is ejected from the lining cylinder 352, completing the collection of the sampled soil column. According to the measured drilling depth and the length of the soil column, the position of the soil to be collected in the soil column is measured.

[0056] Obviously, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art and related fields without creative work should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless specifically described and limited.

Claims

1. A sandy soil sample depth collection device, characterized in that: include: A base (1), wherein a top plate (2) is provided directly above the base (1); A collecting mechanism (3) is fixedly connected to the top of the base (1), and a side of the collecting mechanism (3) away from the base (1) is fixedly connected to the top plate (2); Wherein, the collection mechanism (3) includes: A drill barrel (31), wherein the outer surface of the drill barrel (31) is provided with a thread, the outer side surface of the drill barrel (31) is rotatably connected to the inner side surface of the top plate (2), and the drill barrel (31) is arranged at the center of the top plate (2); A drive assembly (32), wherein the drive assembly (32) is fixedly connected to the top plate (2), and an output end of the drive assembly (32) is fixedly connected to an end of the drill tube (31) away from the base (1); A positioning rod (33), the surface of which is rotatably connected to the inner side of the top plate (2), and four positioning rods (33) are provided at the four corners of the top plate (2), and the positioning rods (33) are slightly longer than the drill tube (31); A sampling assembly (35) is fixedly connected to the inside of the drill barrel (31), and a side of the sampling assembly (35) close to the base (1) extends to the outside of the drill barrel (31).

2. The sandy soil sample depth collection device according to claim 1, characterized in that: The outer side surface of the positioning rod (33) is fixedly connected with a fin (34), the fin (34) is arranged in a triangular prism shape, and the end of the fin (34) close to the base (1) is provided with a slope, and a plurality of the fins (34) are provided, and the plurality of the fins (34) are evenly distributed along the circumference of the positioning rod (33).

3. The sandy soil sample depth collection device according to claim 2, characterized in that: The driving assembly (32) includes a lifting rod (321), the lifting rod (321) is embedded in the top of the base (1), the outer side of the lifting rod (321) is fixedly connected to the inner side of the base (1), the output end of the lifting rod (321) is located at the top of the base (1), and the side of the lifting rod (321) away from the base (1) is fixedly connected to the inner side of the top plate (2), four lifting rods (321) are provided, and the four lifting rods (321) are respectively arranged at intervals between four positioning rods (33).

4. The sandy soil sample depth collection device according to claim 3, characterized in that: A protective cover (322) is fixedly connected to the top of the top plate (2), the positioning rod (33) and the drill tube (31) both extend into the interior of the protective cover (322), and the surfaces of the positioning rod (33) and the drill tube (31) are rotatably connected to the inner side of the protective cover (322).

5. The sandy soil sample depth collection device according to claim 4, characterized in that: One end of the drill tube (31) located inside the shield (322) is fixedly connected to a driving tooth (323), and the drill tube (31) is arranged at the center of the driving tooth (323). The outer side surface of the driving tooth (323) is meshedly connected to a driven tooth ring (324). Four driven tooth rings (324) are provided, and the inner sides of the four driven tooth rings (324) are respectively fixedly connected to the surfaces of four positioning rods (33).

6. The sandy soil sample depth collection device according to claim 5, characterized in that: A rotating shaft (326) is fixedly connected to the side of the driving tooth (323) away from the drill pipe (31), a motor (325) is fixedly connected to the side of the rotating shaft (326) away from the driving tooth (323), an output end of the motor (325) is fixedly connected to the rotating shaft (326), and an outer side surface of the motor (325) is fixedly connected to the bottom of the inner side surface of the shield (322).

7. The sandy soil sample depth collection device according to claim 6, characterized in that: The sampling assembly (35) includes an outer telescopic rod (351), the outer telescopic rod (351) is fixedly connected to the top of the inner side surface of the drill tube (31), and the end of the outer telescopic rod (351) close to the base (1) is fixedly connected to a liner (352), and the side of the liner (352) close to the base (1) is provided with a chamfer, and the chamfer of the liner (352) is provided on a side away from the center thereof.

8. The sandy soil sample depth collection device according to claim 7, characterized in that: An annular plate (353) is provided at one end of the drill barrel (31) close to the base (1), the outer side surface of the annular plate (353) is slidably connected to the inner side surface of the drill barrel (31), and the inner side surface of the annular plate (353) is slidably connected to the inner and outer side surfaces of the liner (352). A spring (354) is provided at a gap between the drill barrel (31) and the liner (352), the spring (354) is fixedly connected to a side of the annular plate (353) away from the base (1), the end of the spring (354) away from the annular plate (353) is fixedly connected to the outer side surface of the liner (352), and an inner telescopic rod (355) is fixedly connected to the top of the inner side surface of the liner (352), and the end of the inner telescopic rod (355) close to the base (1) is fixedly connected to a side of the annular plate (353) away from the base (1).

9. The sandy soil sample depth collection device according to claim 8, characterized in that: A groove body (356) is provided at one end of the ring plate (353) close to the base (1). The cross section of the groove body (356) is arranged to be an isosceles trapezoid. The diameter of the groove body (356) close to the base (1) is larger, and the diameter of the groove body (356) close to the base (1) is the same as the diameter of the liner (352).

10. The sandy soil sample depth collection device according to claim 9, characterized in that: A block (357) is fixedly connected to the top of the inner side surface of the groove body (356), and the block (357) is arranged in a claw shape. The bending direction of the block (357) is the same as the rotation direction of the drill tube (31). The blocks (357) are concentrically distributed in groups, and each group of the blocks (357) has a plurality of blocks evenly distributed along the circumference of the ring plate (353).

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