A device and method for sampling soil in saline-alkali land

Abstract

The present invention relates to the technical field of sampling devices, and discloses a device and method for sampling saline-alkali soil, comprising a drill barrel and a mounting plate, wherein the drill barrel is rotatably mounted on the lower surface of the mounting plate, and a spiral drill blade is provided on the circumferential outer surface of the drill barrel. The present invention generates relative motion between the drill barrel and a conical drill bit, so that the conical drill bit drives a second gear to rotate via a first gear, the second gear drives a third gear to rotate via a rotating rod, and the third gear drives an arc scraper to expand via a sector gear. When the arc scraper is expanded, a scraping port at the feed end of its feed channel contacts the soil hole wall, and soil on the soil hole wall is scraped into the feed channel through the scraping port, and then enters the sample storage bin through the feed port for temporary storage. With this device, saline-alkali soil at multiple depths can be sampled and stored separately at one time, greatly improving the efficiency of soil sampling and reducing the workload of users.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling devices, and in particular to a device and method for sampling soil in saline-alkali land. Background Art

[0002] Saline-alkali land is land with a high salt content, making it unsuitable for plant growth. To improve saline-alkali land and make it suitable for plant production, soil remediation is necessary. Different levels of salinity require different remediation agent compositions and concentrations, so the amount of remediation agent to be used must be determined before remediation. This process requires testing of saline-alkali soil samples.

[0003] The existing soil detection and sampling device and sampling method for saline-alkali land remediation (publication number: CN118624280A) has at least the following disadvantages:

[0004] When the above patent is in use, the retraction component and the abutment plate are set so that the two semi-cylinders can remain in contact during the sampling action, thereby ensuring that the semi-cylinders can enter the soil with less resistance and bring up the soil. The above patent cannot take out soil samples of multiple depths at one time and classify them separately, resulting in the user having to take samples multiple times, which greatly increases the user's workload and affects the efficiency of soil sampling. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a soil sampling device and method for saline-alkali land.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A soil sampling device for saline-alkali land comprises a drill barrel and a mounting plate, wherein the drill barrel is rotatably mounted on the lower surface of the mounting plate, a spiral drill blade is provided on the circumferential outer surface of the drill barrel, a plurality of openings are evenly aligned and opened on the circumferential outer surface of the drill barrel, a rotating shaft is rotatably mounted between the top wall and the bottom wall of the plurality of openings, an arc scraper is fixedly mounted on the circumferential outer surface of the rotating shaft, a feed flow channel is provided inside the arc scraper, a T-shaped slide groove is provided on the inner wall of the drill barrel near the top, and the inside of the drill barrel is provided with a plurality of openings. A sample storage cylinder is provided, and a T-shaped slide is fixedly installed on the outer surface of one side of the sample storage cylinder, and the T-shaped slide is slidably installed with the inner wall of the T-shaped slide groove, and a plurality of partitions are fixedly installed on the inner wall of the sample storage cylinder at equal intervals. The interior of the sample storage cylinder is divided into a plurality of sample storage bins by the partitions, and a plurality of feed ports are aligned up and down on the outer surface of the sample storage cylinder, and the plurality of feed ports are respectively connected with a plurality of sample storage bins, and the discharge end of the feed channel is connected with the sample storage bin through the feed port, and the feed end of the feed channel is provided with a scraper.

[0008] As a further solution of the present invention, the outer surface of the arc scraper block is provided with an arc surface, the inner wall of the opening is matched with the arc surface, the arc surface and the rotating shaft are located at the same center, the outer surface of the sample storage tube is provided with an arc surface matching the arc surface, the feed port is provided on one side of the arc surface, and the arc surface and the rotating shaft are located at the same center.

[0009] As a further solution of the present invention, a mounting groove is provided on the circumferential outer surface of the rotating shaft near the sample storage tube side, and a fan gear is fixedly installed between the inner walls of the mounting groove. The fan gear and the rotating shaft are arranged at the same center of a circle. A plurality of groups of support blocks are fixedly installed in pairs on the inner wall of the drill tube near the opening, and are aligned up and down. A rotating rod is rotatably installed between the plurality of groups of support blocks. A third gear is fixedly installed on the circumferential outer surface of the rotating rod near the fan gear, and the third gear is meshed with the fan gear.

[0010] As a further solution of the present invention, a conical drill bit is rotatably installed on the inner wall of the drill barrel near the bottom end, a first gear is fixedly installed on the upper surface of the conical drill bit, and a second gear is fixedly installed on the bottom end of the rotating rod, and the first gear is meshed with the second gear.

[0011] As a further solution of the present invention, a plurality of L-shaped stops are fixedly installed at equal intervals in the circumferential direction of the upper surface of the conical drill bit, an arc slide is provided at the top of the L-shaped stop, and a plurality of arc stop grooves are opened at equal intervals in the circumferential direction of the lower surface of the drill barrel. The arc slide at the top of the L-shaped stop block is arranged inside the arc stop groove and slidably installed with the inner wall thereof, a spring is fixedly installed on the outer surface of the L-shaped stop block close to the arc slide, and the other end of the spring is fixedly connected to the inner wall of the arc stop groove.

[0012] As a further solution of the present invention, the top end of the drill barrel passes through the upper surface of the mounting plate and is fixedly installed with a driven gear, the upper surface of the mounting plate is rotatably installed with a driving gear, the driving gear is engaged with the driven gear, and the lower surface of the mounting plate is fixedly installed with a driving motor, the output end of the driving motor passes through the upper surface of the mounting plate and is fixedly installed with the rotation center of the driven gear, and two handrails are symmetrically fixedly installed on the upper surface of the mounting plate.

[0013] As a further solution of the present invention, the diameter of the highest point of the expanded arc scraper is greater than the diameter of the spiral drill blade.

[0014] A method for using a saline-alkali soil sampling device comprises the following steps:

[0015] S1: Before use, the user inserts the T-shaped slide on the outer surface of the sample storage tube into the T-shaped slide groove, and places the sample storage tube inside the drill tube. When in use, the user places the device on the designated soil surface by holding the handrail, and the drill tube is in a vertical position;

[0016] S2: The driving motor is started to drive the driving gear to rotate, which drives the driven gear to rotate forward, which drives the drill barrel to rotate forward, and the drill barrel transmits torque through the L-shaped block and the circular arc retaining groove to drive the conical drill bit to rotate forward. The forward rotation of the drill barrel and the conical drill bit causes the spiral drill blade on the outer surface of the drill barrel to drill a hole in the soil surface;

[0017] S3: The drive motor is controlled to reverse, causing the drill barrel and the conical drill bit to reverse. When the drill barrel and the conical drill bit reverse, the spiral drill blade will drive the soil particles on the drill barrel and the inner wall of the hole to the bottom of the hole. When the soil particles below the hole increase, they will hinder the reverse rotation of the conical drill bit. At this time, the drill barrel and the conical drill bit produce relative motion;

[0018] S4: The drill barrel and the conical drill bit generate relative motion, so that the conical drill bit drives the second gear to rotate through the first gear, the second gear drives the third gear to rotate through the rotating rod, and the third gear drives the arc scraper to expand through the fan gear, and the soil on the soil hole wall is scraped into the inside of the feed flow channel through the scraping port, and then enters the sample storage bin through the feed port for temporary storage.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The drill barrel and the conical drill bit generate relative motion, so that the conical drill bit drives the second gear to rotate through the first gear, the second gear drives the third gear to rotate through the rotating rod, and the third gear drives the arc scraper to expand through the fan gear. When the arc scraper is expanded, the scraping mouth at the feeding end of the feed channel will contact the soil hole wall, and the soil on the soil hole wall will be scraped into the inside of the feed channel through the scraping mouth, and then enter the sample storage bin through the feed port for temporary storage. Through this device, saline-alkali soil at multiple depths can be sampled and stored separately at one time, which greatly improves the efficiency of soil sampling and reduces the workload of users.

[0021] 2. By starting the drive motor to drive the driving gear to rotate, the driving gear drives the driven gear to rotate forward, and the driven gear drives the drill barrel to rotate forward. The drill barrel transmits torque through the L-shaped block and the arc stop groove to drive the conical drill bit to rotate forward. The forward rotation of the drill barrel and the conical drill bit causes the spiral drill blade on the outer surface to drill a hole in the soil surface. This device makes it easy to drill holes in saline-alkali soil and facilitates subsequent sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a soil sampling device for saline-alkali land proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the top view of a soil sampling device for saline-alkali land proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of a conical drill bit for a saline-alkali soil sampling device proposed by the present invention;

[0025] Figure 4 This is a cross-sectional schematic diagram of a drill barrel for a saline-alkali soil sampling device proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the expanded state of the arc scraper of the saline-alkali soil sampling device proposed by the present invention;

[0027] Figure 6 Schematic diagram of an L-shaped block for a saline-alkali soil sampling device proposed by the present invention

[0028] Figure 7 This is a schematic diagram of an arc retaining groove for a saline-alkali soil sampling device proposed by the present invention;

[0029] Figure 8 This is a schematic diagram of an arc scraper for a saline-alkali soil sampling device proposed by the present invention;

[0030] Figure 9 This is a schematic diagram of a sample storage cylinder for a saline-alkali soil sampling device proposed by the present invention;

[0031] Figure 10 The present invention provides a schematic cross-sectional view of a sample storage tube for a saline-alkali soil sampling device.

[0032] In the figure: 1. Drill barrel; 2. Mounting plate; 3. Handrail; 4. Driven gear; 5. Drive gear; 6. Drive motor; 7. Conical drill bit; 8. Arc scraper; 801. Rotating shaft; 802. Fan gear; 803. Feed channel; 9. Sample storage barrel; 901. T-shaped slide; 902. Feed port; 903. Partition; 904. T-shaped slide; 10. L-shaped stopper; 11. First gear; 12. Second gear; 13. Rotating rod; 14. Third gear; 15. Opening; 16. Arc stopper groove; 17. Spring; 18. Support block. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0034] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] Reference Figures 1-10 A soil sampling device for saline-alkali land comprises a drill barrel 1 and a mounting plate 2. The drill barrel 1 is rotatably mounted on the lower surface of the mounting plate 2. A spiral drill blade is provided on the circumferential outer surface of the drill barrel 1. A plurality of openings 15 are evenly aligned and opened on the circumferential outer surface of the drill barrel 1. A rotating shaft 801 is rotatably mounted between the top wall and the bottom wall of the plurality of openings 15. An arc scraper 8 is fixedly mounted on the circumferential outer surface of the rotating shaft 801. A feed flow channel 803 is provided inside the arc scraper 8. A T-shaped slide groove 901 is provided on the inner wall of the drill barrel 1 near the top. A storage The sample tube 9 has a T-shaped slide 904 fixedly installed on the outer surface of one side of the sample tube 9, and the T-shaped slide 904 is slidably installed with the inner wall of the T-shaped slide groove 901. A plurality of partitions 903 are fixedly installed at equal intervals on the inner wall of the sample tube 9. The interior of the sample tube 9 is divided into a plurality of sample storage bins by the partitions 903. A plurality of feed ports 902 are aligned up and down on the outer surface of the sample tube 9. The plurality of feed ports 902 are respectively connected with the plurality of sample storage bins. The discharge end of the feed channel 803 is connected with the sample storage bin through the feed port 902, and the feed end of the feed channel 803 is provided with a scraper.

[0037] Relative movement is generated between the drill barrel 1 and the conical drill bit 7, so that the conical drill bit 7 drives the second gear 12 to rotate through the first gear 11, and the second gear 12 drives the third gear 14 to rotate through the rotating rod 13. The third gear 14 drives the arc scraper 8 to expand through the sector gear 802. When the arc scraper 8 is expanded, the scraping mouth at the feeding end of its feed channel 803 will contact the soil hole wall, and the soil on the soil hole wall will be scraped into the inside of the feed channel 803 through the scraping mouth, and then enter the sample storage bin through the feed port 902 for temporary storage. Through this device, saline-alkali soil of multiple depths can be sampled and stored separately at one time, which greatly improves the efficiency of soil sampling and reduces the workload of users.

[0038] In this embodiment, the outer surface of the arc scraper 8 is provided with an arc surface, the inner wall of the opening 15 is matched with the arc surface, the arc surface and the rotating shaft 801 are located at the same center, the outer surface of the sample storage tube 9 is provided with an arc surface matching the arc surface, the feed port 902 is provided on one side of the arc surface, and the arc surface and the rotating shaft 801 are located at the same center.

[0039] This arrangement ensures that the interior of the drill tube 1 is always in a completely sealed state, and prevents soil particles of other depths from being mixed into the sample storage chamber of the sample storage tube 9, thereby ensuring that the soil is not mixed with soil particles of other depths.

[0040] In this embodiment, a mounting groove is provided on the circumferential outer surface of the rotating shaft 801 near the sample storage tube 9, and a sector gear 802 is fixedly installed between the inner walls of the mounting groove. The sector gear 802 and the rotating shaft 801 are arranged at the same center of a circle. A plurality of groups of support blocks 18 are fixedly installed on the inner wall of the drill tube 1 near the opening 15 in pairs, aligned up and down. A rotating rod 13 is rotatably installed between the plurality of support blocks 18. A third gear 14 is fixedly installed on the circumferential outer surface of the rotating rod 13 near the sector gear 802. The third gear 14 is meshed with the sector gear 802. A conical drill bit 7 is rotatably installed on the inner wall of the drill tube 1 near the bottom end. The upper surface of the conical drill bit 7 A first gear 11 is fixedly installed, and a second gear 12 is fixedly installed at the bottom end of the rotating rod 13. The first gear 11 is meshed with the second gear 12. A plurality of L-shaped stops 10 are fixedly installed at equal intervals in the circumferential direction of the upper surface of the conical drill bit 7. An arc slide is provided at the top of the L-shaped stop 10. A plurality of arc stop grooves 16 are equidistantly provided in the circumferential direction of the lower surface of the drill barrel 1. The arc slide at the top of the L-shaped stop 10 is arranged inside the arc stop groove 16 and is slidably installed with its inner wall. A spring 17 is fixedly installed on the outer surface of the L-shaped stop 10 close to the arc slide, and the other end of the spring 17 is fixedly connected to the inner wall of the arc stop groove 16.

[0041] When the conical drill bit 7 drills to the specified depth, the user pulls the device upward for a distance through the handrail 3, and then controls the drive motor 6 to reverse, so that the drill barrel 1 and the conical drill bit 7 reverse. When the drill barrel 1 and the conical drill bit 7 reverse, the spiral drill blade will drive the drill barrel 1 and the soil particles on the inner wall of the hole to the bottom of the hole. When the soil particles below the hole become more, they will hinder the reversal of the conical drill bit 7. At this time, the drill barrel 1 and the conical drill bit 7 produce relative motion, and the arc slide at the top of the L-shaped stop block 10 will slide to the end of the arc stop groove 16 close to the spring 17 until the arc slide is against the inner wall of the arc stop groove 16. At this time, the conical drill bit 7 continues to reverse with the drill barrel 1.

[0042] In this embodiment, the top end of the drill tube 1 passes through the upper surface of the mounting plate 2 and is fixedly mounted with a driven gear 4, the upper surface of the mounting plate 2 is rotatably mounted with a driving gear 5, the driving gear 5 is engaged with the driven gear 4, and the lower surface of the mounting plate 2 is fixedly mounted with a driving motor 6, the output end of the driving motor 6 passes through the upper surface of the mounting plate 2 and is fixedly mounted at the rotation center of the driven gear 4, and two handrails 3 are symmetrically fixedly mounted on the upper surface of the mounting plate 2.

[0043] By starting the drive motor 6, the drive gear 5 is driven to rotate, and the drive gear 5 drives the driven gear 4 to rotate forward, and the driven gear 4 drives the drill barrel 1 to rotate forward. The drill barrel 1 transmits torque through the L-shaped block 10 and the arc stop groove 16 to drive the conical drill bit 7 to rotate forward. The forward rotation of the drill barrel 1 and the conical drill bit 7 enables the spiral drill blade on the outer surface to drill a hole in the soil surface. The device facilitates drilling of saline-alkali soil and facilitates subsequent sampling.

[0044] In this embodiment, the diameter of the highest point of the arc scraper 8 is larger than the diameter of the spiral drill blade. This arrangement makes it easier for the arc scraper 8 to scrape soil particles.

[0045] In this embodiment, it should be noted that when the drill barrel 1 and the conical drill bit 7 are reversed, the soil particles on the drill barrel 1 and the inner wall of the hole will be driven to the bottom of the hole by the spiral drill blade. At the same time, the arc scraper 8 is behind the movement of the spiral drill blade, and the spiral drill blade will take away the soil particles between the soil hole wall and the drill barrel 1. This setting ensures that the arc scraper 8 can accurately take samples of the corresponding depth without mixing with other soil samples, thereby avoiding affecting the accuracy of subsequent detection data.

[0046] A method for using a saline-alkali soil sampling device comprises the following steps:

[0047] S1: Before use, the user inserts the T-shaped slide 904 on the outer surface of the sample storage tube 9 into the T-shaped slide groove 901, and places the sample storage tube 9 inside the drill tube 1. When in use, the user places the device on the designated soil surface by holding the handrail 3, and the drill tube 1 is in a vertical position;

[0048] S2: The driving motor 6 is started to drive the driving gear 5 to rotate, and the driving gear 5 drives the driven gear 4 to rotate forward, which in turn drives the drill barrel 1 to rotate forward. The drill barrel 1 transmits torque through the L-shaped stopper 10 and the arc stop groove 16 to drive the conical drill bit 7 to rotate forward. The forward rotation of the drill barrel 1 and the conical drill bit 7 causes the spiral drill blade on the outer surface of the drill barrel 1 to drill a hole in the soil surface.

[0049] S3: The drive motor 6 is controlled to reverse, causing the drill barrel 1 and the conical drill bit 7 to reverse. When the drill barrel 1 and the conical drill bit 7 reverse, the spiral drill blade will drive the drill barrel 1 and the soil particles on the inner wall of the hole to the bottom of the hole. When the soil particles below the hole increase, they will hinder the reverse rotation of the conical drill bit 7. At this time, the drill barrel 1 and the conical drill bit 7 generate relative motion;

[0050] S4: Relative movement is generated between the drill barrel 1 and the conical drill bit 7, so that the conical drill bit 7 drives the second gear 12 to rotate through the first gear 11, the second gear 12 drives the third gear 14 to rotate through the rotating rod 13, and the third gear 14 drives the arc scraper 8 to unfold through the fan gear 802, and scrapes the soil on the soil hole wall into the inside of the feed flow channel 803 through the scraping port, and then enters the sample storage bin through the feed port 902 for temporary storage.

[0051] It should be noted that before using the present invention, the user inserts the T-shaped slide 904 on the outer surface of the sample storage tube 9 into the inside of the T-shaped slide 901, and places the sample storage tube 9 inside the drill tube 1. When using, the user places the device on the designated soil surface by holding the handrail 3, and the drill tube 1 is in a vertical state;

[0052] By starting the drive motor 6 to drive the drive gear 5 to rotate, the drive gear 5 drives the driven gear 4 to rotate forward, and the driven gear 4 drives the drill tube 1 to rotate forward. The drill tube 1 transmits torque through the L-shaped block 10 and the arc retaining groove 16 to drive the conical drill bit 7 to rotate forward. The forward rotation of the drill tube 1 and the conical drill bit 7 causes the spiral drill blade on the outer surface of the drill tube 1 to drill a hole in the soil surface. The device is convenient for drilling saline-alkali soil and is convenient for subsequent sampling.

[0053] When the cone drill bit 7 drills to the specified depth, the user pulls the device upward for a distance through the handrail 3, and then controls the drive motor 6 to reverse, so that the drill barrel 1 and the cone drill bit 7 reverse. When the drill barrel 1 and the cone drill bit 7 reverse, the spiral drill blade will drive the drill barrel 1 and the soil particles on the inner wall of the hole to the bottom of the hole. When the soil particles below the hole increase, they will hinder the reversal of the cone drill bit 7. At this time, the drill barrel 1 and the cone drill bit 7 produce relative motion, and the arc slide at the top of the L-shaped stopper 10 will slide to the end of the arc stop groove 16 close to the spring 17 until the arc slide is against the inner wall of the arc stop groove 16. At this time, the cone drill bit 7 continues to reverse with the drill barrel 1.

[0054] The drill barrel 1 and the conical drill bit 7 generate relative motion, so that the conical drill bit 7 drives the second gear 12 to rotate through the first gear 11, and the second gear 12 drives the third gear 14 to rotate through the rotating rod 13. The third gear 14 drives the arc scraper 8 to expand through the sector gear 802. When expanded, the discharge end of the feed channel 803 will be connected with the feed port 902. At the same time, when the arc scraper 8 is expanded, the scraping mouth of the feed end of the feed channel 803 will contact the soil hole wall, and the soil on the soil hole wall will be scraped into the inside of the feed channel 803 through the scraping mouth, and then enter the sample storage bin through the feed port 902 for temporary storage. Through this device, saline-alkali soil of multiple depths can be sampled and stored separately at one time, which greatly improves the efficiency of soil sampling and reduces the workload of users.

[0055] During sampling, the user can see whether the arc scraper 8 is unfolded through the port on the top of the drill barrel 1. After sampling is completed, the arc scraper 8 can be retracted into the interior of the drill barrel 1 by driving the motor 6 to rotate forward, which is convenient for subsequent sampling; the user manually takes out the sample storage tube 9, and then pours out the soil sample from the feed port 902 to complete the sampling.

[0056] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A soil sampling device for saline-alkali land, comprising a drill barrel (1) and a mounting plate (2), wherein the drill barrel (1) is rotatably mounted on the lower surface of the mounting plate (2), and a spiral drill blade is provided on the circumferential outer surface of the drill barrel (1), characterized in that: The outer circumferential surface of the drill tube (1) is evenly aligned with a plurality of openings (15), and a rotating shaft (801) is rotatably installed between the top wall and the bottom wall of the plurality of openings (15). An arc scraper (8) is fixedly installed on the outer circumferential surface of the rotating shaft (801), and a feed flow channel (803) is provided inside the arc scraper (8). A T-shaped slide groove (901) is provided on the inner wall of the drill tube (1) near the top, and a sample storage barrel (9) is provided inside the drill tube (1). A T-shaped slide bar (904) is fixedly installed on the outer surface of one side of the sample storage barrel (9), and the T-shaped slide bar (90 4) is slidably mounted on the inner wall of the T-shaped slide groove (901), and a plurality of partitions (903) are fixedly mounted on the inner wall of the sample storage cylinder (9) at equal intervals. The interior of the sample storage cylinder (9) is divided into a plurality of sample storage bins by the partitions (903). The outer surface of the sample storage cylinder (9) is provided with a plurality of feed ports (902) aligned in the upper and lower directions. The plurality of feed ports (902) are respectively connected to the plurality of sample storage bins. The discharge end of the feed channel (803) is connected to the sample storage bin through the feed port (902). The feed end of the feed channel (803) is provided with a scraper. The diameter of the highest point of the arc scraper (8) is The diameter of the spiral drill blade is larger than that of the spiral drill blade. A conical drill bit (7) is rotatably mounted on the inner wall of the drill barrel (1) near the bottom end. A plurality of L-shaped stoppers (10) are fixedly mounted at equal intervals in the circumferential direction on the upper surface of the conical drill bit (7). The top of the L-shaped stopper (10) is provided with an arc slide. A plurality of arc stop grooves (16) are opened at equal intervals in the circumferential direction on the lower surface of the drill barrel (1). The arc slide at the top of the L-shaped stopper (10) is arranged inside the arc stop groove (16) and is slidably mounted on the inner wall thereof. A spring (17) is fixedly mounted on the outer surface of the L-shaped stopper (10) near the arc slide. The other end of (17) is fixedly connected to the inner wall of the arc retaining groove (16). When the drill barrel (1) and the conical drill bit (7) are reversed, the spiral drill blade will drive the drill barrel (1) and the soil particles on the inner wall of the hole to the bottom of the hole. When the soil particles below the hole become more, they will hinder the reversal of the conical drill bit (7). At this time, the drill barrel (1) and the conical drill bit (7) produce relative motion, and the arc scraper (8) is behind the movement of the spiral drill blade. The spiral drill blade will take away the soil particles between the soil hole wall and the drill barrel (1). The arc scraper (8) can accurately take samples of the corresponding depth without mixing with other soil samples.

2. A soil sampling device for saline-alkali land according to claim 1, characterized in that: The outer surface of the arc scraper (8) is provided with an arc surface, the inner wall of the opening (15) is provided to match the arc surface, the arc surface and the rotating shaft (801) are located at the same center, the outer surface of the sample storage cylinder (9) is provided with an arc surface matching the arc surface, the feed port (902) is provided on one side of the arc surface, and the arc surface and the rotating shaft (801) are located at the same center.

3. The soil sampling device for saline-alkali land according to claim 1, characterized in that: The rotating shaft (801) is provided with an installation groove on the circumferential outer surface near the sample storage tube (9), and a fan gear (802) is fixedly installed between the inner walls of the installation groove. The fan gear (802) and the rotating shaft (801) are arranged at the same center of a circle. A plurality of groups of support blocks (18) are fixedly installed in pairs on the inner wall of the drill tube (1) near the opening (15), and are aligned up and down. A rotating rod (13) is rotatably installed between the plurality of groups of support blocks (18). A third gear (14) is fixedly installed on the circumferential outer surface of the rotating rod (13) near the fan gear (802), and the third gear (14) is meshed with the fan gear (802).

4. The soil sampling device for saline-alkali land according to claim 3, characterized in that: A first gear (11) is fixedly mounted on the upper surface of the conical drill bit (7), and a second gear (12) is fixedly mounted on the bottom end of the rotating rod (13), and the first gear (11) is meshed with the second gear (12).

5. The soil sampling device for saline-alkali land according to claim 1, characterized in that: The top end of the drill tube (1) passes through the upper surface of the mounting plate (2) and is fixedly mounted with a driven gear (4); the upper surface of the mounting plate (2) is rotatably mounted with a driving gear (5); the driving gear (5) is meshed with the driven gear (4); a driving motor (6) is fixedly mounted on the lower surface of the mounting plate (2); the output end of the driving motor (6) passes through the upper surface of the mounting plate (2) and is fixedly mounted with the rotation center of the driven gear (4); and two handrails (3) are symmetrically fixedly mounted on the upper surface of the mounting plate (2).

6. A method for using a saline-alkali soil sampling device, characterized in that: Using a soil sampling device for saline-alkali land according to any one of claims 1 to 5, The following steps are involved: S1: Before use, the user inserts the T-shaped slide (904) on the outer surface of the sample storage tube (9) into the inside of the T-shaped slide groove (901), and sets the sample storage tube (9) inside the drill tube (1). When using, the user places the device on the designated soil surface by holding the handrail (3), and the drill tube (1) is in a vertical state; S2: The driving motor (6) is started to drive the driving gear (5) to rotate, the driving gear (5) drives the driven gear (4) to rotate forward, and the driven gear (4) drives the drill barrel (1) to rotate forward, and the drill barrel (1) transmits torque through the L-shaped stopper (10) and the arc stop groove (16) to drive the conical drill bit (7) to rotate forward, and the spiral drill blade on the outer surface of the drill barrel (1) and the conical drill bit (7) drills a hole in the soil surface through the forward rotation of the drill barrel (1) and the conical drill bit (7); S3: The driving motor (6) is controlled to reverse, so that the drill barrel (1) and the conical drill bit (7) are reversed. When the drill barrel (1) and the conical drill bit (7) are reversed, the spiral drill blade will drive the drill barrel (1) and the soil particles on the inner wall of the hole to the bottom of the hole. When the soil particles below the hole increase, they will hinder the reverse rotation of the conical drill bit (7). At this time, the drill barrel (1) and the conical drill bit (7) generate relative motion; S4: Relative motion is generated by the drill barrel (1) and the conical drill bit (7), so that the conical drill bit (7) drives the second gear (12) to rotate through the first gear (11), the second gear (12) drives the third gear (14) to rotate through the rotating rod (13), and the third gear (14) drives the arc scraper (8) to expand through the fan gear (802), and the soil on the soil hole wall is scraped into the inside of the feed flow channel (803) through the scraping port, and then enters the interior of the sample storage bin through the feed port (902) for temporary storage.

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