Saline-alkali soil sampling device and method

Abstract

The invention relates to the technical field of sampling devices, and discloses a saline-alkali soil sampling device and method.The saline-alkali soil sampling device comprises a drilling barrel and a mounting plate, the drilling barrel is rotationally mounted on the lower surface of the mounting plate, and a spiral drilling edge is arranged on the circumferential outer surface of the drilling barrel. The drill barrel and the conical drill bit generate relative movement, 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, the third gear drives the arc scraping block to unfold through the sector gear, and when the arc scraping block unfolds, a scraping opening in the feeding end of the feeding flow channel can make contact with the soil hole wall, so that the soil hole wall is scraped; soil on the soil hole wall is scraped into the feeding flow channel through the scraping opening, then the soil enters the sample storage bin through the feeding opening to be temporarily stored, saline-alkali soil at multiple depths can be sampled at a time through the device and independently stored, the soil sampling efficiency is greatly improved, and the workload of a user is relieved.

Description

Technical Field

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

[0002] Saline-alkali land is land containing more salts, and such land is not conducive to the growth of plants. In order to improve saline-alkali land to make it suitable for plant production, soil remediation is required, and for saline-alkali land with different degrees, the components and contents of the remediation agents required are also different. Therefore, it is necessary to determine the dosage of the remediation agent before remediation, and soil samples of saline-alkali land are needed for testing in this process.

[0003] An existing soil detection sampling device and sampling method for saline-alkali land remediation (Publication No.: CN118624280A) has at least the following drawbacks: When the above patent is used, through the set retracting assembly and abutting plate, when the sampling action is carried out, the two semi-cylindrical tubes can keep in a fitting state, so as to ensure that the semi-cylindrical tubes can enter the soil with less resistance and bring up the soil. The above patent cannot take out soil samples at multiple depths at one time and classify them separately, resulting in the need for the user to take samples multiple times, greatly increasing the workload of the user and affecting the efficiency of soil sampling. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a soil sampling device and method for saline-alkali land are proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A soil sampling device for saline-alkali land includes a drill tube and a mounting plate. The drill tube is rotatably mounted on the lower surface of the mounting plate. A spiral drill edge is provided on the circumferential outer surface of the drill tube. A plurality of openings are evenly opened on the circumferential outer surface of the drill tube in an up-and-down alignment. A rotating shaft is rotatably mounted between the top wall and the bottom wall of each of the plurality of openings. An arc scraping block is fixedly mounted on the circumferential outer surface of the rotating shaft. A feeding flow channel is opened inside the arc scraping block. A T-shaped sliding groove is opened on the inner wall of the drill tube near the top end. A sample storage tube is arranged inside the drill tube. A T-shaped sliding strip is fixedly mounted on the outer surface of one side of the sample storage tube. The T-shaped sliding strip is slidably mounted on the inner wall of the T-shaped sliding groove. A plurality of partition plates are fixedly mounted on the inner wall of the sample storage tube at equal intervals. The inside of the sample storage tube is divided into a plurality of sample storage bins by the partition plates. A plurality of feeding ports are opened on the outer surface of the sample storage tube in an up-and-down alignment. The plurality of feeding ports are respectively communicated with the plurality of sample storage bins. The discharging end of the feeding flow channel is communicated with the sample storage bin through the feeding port. A scraping opening is arranged at the feeding end of the feeding flow channel.

[0006] As a further solution of the present invention, an arc surface is provided on the outer surface of the arc scraping block, the inner wall of the opening is arranged to match the arc surface, the arc surface and the rotating shaft are arranged at the same center of the circle, an arc surface matching the arc surface is provided on the outer surface of the sample storage cylinder, the feeding port is arranged on one side of the arc surface, and the arc surface and the rotating shaft are arranged at the same center of the circle.

[0007] As a further solution of the present invention, an installation groove is opened on the circumferential outer surface of the rotating shaft close to the sample storage cylinder, a sector gear is fixedly installed between the inner walls of the installation groove, the sector gear and the rotating shaft are arranged at the same center of the circle, multiple groups of support blocks are fixedly installed in pairs and aligned up and down on the inner wall of the drill cylinder close to the opening, a rotating rod is rotatably installed between the multiple groups of support blocks, a third gear is fixedly installed on the circumferential outer surface of the rotating rod close to the sector gear, and the third gear meshes with the sector gear.

[0008] As a further solution of the present invention, a conical drill bit is rotatably installed on the inner wall of the drill cylinder close to the bottom end, a first gear is fixedly installed on the upper surface of the conical drill bit, a second gear is fixedly installed at the bottom end of the rotating rod, and the first gear meshes with the second gear.

[0009] As a further solution of the present invention, a plurality of L-shaped stoppers are fixedly installed at equal intervals in the circumferential direction on the upper surface of the conical drill bit, an arc-shaped sliding bar is arranged at the top end of the L-shaped stopper, a plurality of arc-shaped retaining grooves are opened at equal intervals in the circumferential direction on the lower surface of the drill cylinder, the arc-shaped sliding bar at the top end of the L-shaped stopper is arranged inside the arc-shaped retaining groove and slidably installed with its inner wall, and a spring is fixedly installed on the outer surface of the L-shaped stopper close to the arc-shaped sliding bar, and the other end of the spring is fixedly connected to the inner wall of the arc-shaped retaining groove.

[0010] As a further solution of the present invention, the top end of the drill cylinder penetrates through the upper surface of the mounting plate and is fixedly installed with a driven gear, a driving gear is rotatably installed on the upper surface of the mounting plate, the driving gear meshes with the driven gear, a driving motor is fixedly installed on the lower surface of the mounting plate, the output end of the driving motor penetrates 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 and fixedly installed on the upper surface of the mounting plate.

[0011] As a further solution of the present invention, the diameter of the highest point of the arc scraping block when unfolded is greater than the diameter of the spiral drill edge.

[0012] A method for using a soil sampling device for saline-alkali land includes the following steps: S1: Before use, the user inserts the T-shaped slide bar on the outer surface of the sample storage cylinder into the inside of the T-shaped slide groove, sets the sample storage cylinder inside the drill cylinder. When in use, the user places the device on the specified soil ground by holding the handrail, and the drill cylinder is in a vertical state; S2: Start the drive motor to drive the drive gear to rotate. The drive gear drives the driven gear to rotate forward. The driven gear drives the drill barrel to rotate forward. The drill barrel drives the conical drill bit to rotate forward through the L-shaped block and the arc-shaped slot. The spiral drill edge on the outer surface of the drill barrel and the conical drill bit drills the soil surface during their forward rotation. S3: Control the drive motor to reverse, so that the drill barrel and the conical drill bit reverse. When the drill barrel and the conical drill bit reverse, the spiral drill edge will drive the soil particles between the drill barrel and the inner wall of the hole to the bottom of the hole. When there are more soil particles at the bottom of the hole, it will hinder the reverse rotation of the conical drill bit. At this time, relative movement occurs between the drill barrel and the conical drill bit. S4: Due to the relative movement between the drill barrel and the conical drill bit, 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. The third gear drives the arc-shaped scraping block to unfold through the sector gear. When the arc-shaped scraping block unfolds, the scraping opening at the feeding end of its feeding channel will contact the soil hole wall, and scrape the soil on the soil hole wall into the interior of the feeding channel, and then enter the interior of the sample storage bin through the feeding port for temporary storage.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Due to the relative movement between the drill barrel and the conical drill bit, 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. The third gear drives the arc-shaped scraping block to unfold through the sector gear. When the arc-shaped scraping block unfolds, the scraping opening at the feeding end of its feeding channel will contact the soil hole wall, and scrape the soil on the soil hole wall into the interior of the feeding channel, and then enter the interior of the sample storage bin through the feeding port for temporary storage. With this device, soil samples can be taken and stored separately for saline-alkali soil at multiple depths at one time, greatly improving the efficiency of soil sampling and reducing the workload of operators.

[0014] 2. Start the drive motor to drive the drive gear to rotate. The drive gear drives the driven gear to rotate forward. The driven gear drives the drill barrel to rotate forward. The drill barrel drives the conical drill bit to rotate forward through the L-shaped block and the arc-shaped slot. The spiral drill edge on the outer surface of the drill barrel and the conical drill bit drills the soil surface during their forward rotation. With this device, it is convenient to drill saline-alkali soil for subsequent sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of a device for sampling saline-alkali soil proposed by the present invention; Figure 2 is the top view structural schematic diagram of a device for sampling saline-alkali soil proposed by the present invention; Figure 3 is the schematic diagram of the conical drill bit of a device for sampling saline-alkali soil proposed by the present invention; Figure 4Schematic cross-sectional view of the drill cylinder of a soil sampling device for saline-alkali land proposed by the present invention; Figure 5 Schematic view of the unfolded state of the arc scraping block of a soil sampling device for saline-alkali land proposed by the present invention; Figure 6 Schematic view of the L-shaped stop block of a soil sampling device for saline-alkali land proposed by the present invention Figure 7 Schematic view of the arc-shaped retaining groove of a soil sampling device for saline-alkali land proposed by the present invention; Figure 8 Schematic view of the arc scraping block of a soil sampling device for saline-alkali land proposed by the present invention; Figure 9 Schematic view of the sample storage cylinder of a soil sampling device for saline-alkali land proposed by the present invention; Figure 10 Schematic cross-sectional view of the sample storage cylinder of a soil sampling device for saline-alkali land proposed by the present invention.

[0016] In the figure: 1. Drill cylinder; 2. Installation plate; 3. Handrail; 4. Driven gear; 5. Driving gear; 6. Driving motor; 7. Taper bit; 8. Arc scraping block; 801. Rotating shaft; 802. Sector gear; 803. Feed channel; 9. Sample storage cylinder; 901. T-shaped sliding groove; 902. Feed inlet; 903. Partition; 904. T-shaped sliding strip; 10. L-shaped stop block; 11. First gear; 12. Second gear; 13. Rotating rod; 14. Third gear; 15. Opening; 16. Arc-shaped retaining groove; 17. Spring; 18. Support block. Detailed implementation manners

[0017] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0018] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "equipped with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Referring to Figures 1 - 10 , a soil sampling device for saline-alkali land, comprising 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 edge is provided on the circumferential outer surface of the drill barrel 1. A plurality of openings 15 are evenly opened on the circumferential outer surface of the drill barrel 1 in an up-and-down alignment. A rotating shaft 801 is rotatably mounted between the top wall and the bottom wall of each of the plurality of openings 15. An arc-shaped scraping block 8 is fixedly mounted on the circumferential outer surface of the rotating shaft 801. A feed flow channel 803 is opened inside the arc-shaped scraping block 8. A T-shaped sliding groove 901 is opened on the inner wall of the drill barrel 1 near the top end. A sample storage cylinder 9 is arranged inside the drill barrel 1. A T-shaped sliding strip 904 is fixedly mounted on the outer surface of one side of the sample storage cylinder 9. The T-shaped sliding strip 904 is slidably mounted on the inner wall of the T-shaped sliding groove 901. A plurality of partition plates 903 are fixedly mounted on the inner wall of the sample storage cylinder 9 at equal intervals. The inside of the sample storage cylinder 9 is divided into a plurality of sample storage bins by the partition plates 903. A plurality of feed ports 902 are opened on the outer surface of the sample storage cylinder 9 in an up-and-down alignment. The plurality of feed ports 902 are respectively communicated with the plurality of sample storage bins. The discharge end of the feed flow channel 803 is communicated with the sample storage bin through the feed port 902. A scraping opening is provided at the feed end of the feed flow channel 803.

[0021] Through the relative movement between the drill barrel 1 and the conical drill bit 7, 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. The third gear 14 drives the arc-shaped scraping block 8 to unfold through the sector gear 802. When the arc-shaped scraping block 8 unfolds, the scraping opening at the feed end of its feed flow channel 803 will contact the soil hole wall, scrape the soil on the soil hole wall into the inside of the feed flow channel 803 through the scraping opening, and then enter the inside of the sample storage bin through the feed port 902 for temporary storage. With this device, the soil of saline-alkali land at multiple depths can be sampled and stored separately at one time, greatly improving the efficiency of soil sampling and reducing the workload of the users.

[0022] In this embodiment, an arc surface is provided on the outer surface of the arc-shaped scraping block 8. The inner wall of the opening 15 is matched with the arc surface. The arc surface and the rotating shaft 801 are arranged at the same center of the circle. An arc surface matching the arc surface is provided on the outer surface of the sample storage cylinder 9. The feed port 902 is arranged on one side of the arc surface. The arc surface and the rotating shaft 801 are arranged at the same center of the circle.

[0023] With this setting, the inside of the drill barrel 1 is always in a completely sealed state, and the soil sample storage bin inside the soil sample storage cylinder 9 will not be mixed with soil particles at other depths, ensuring that the soil will not be mixed with soil particles at other depths.

[0024] In this embodiment, an installation groove is formed on the circumferential outer surface of the rotating shaft 801 close to the soil sample storage cylinder 9. A sector gear 802 is fixedly installed between the inner walls of the installation groove. The sector gear 802 and the rotating shaft 801 are arranged at the same center of the circle. Multiple groups of support blocks 18 are fixedly installed in pairs on the inner wall of the drill barrel 1 close to the opening 15 in an up-and-down alignment. A rotating rod 13 is rotatably installed between the multiple groups of support blocks 18. A third gear 14 is fixedly installed on the circumferential outer surface of the rotating rod 13 close to the sector gear 802. The third gear 14 meshes with the sector gear 802. A conical drill bit 7 is rotatably installed on the inner wall of the drill barrel 1 close to the bottom end. A first gear 11 is fixedly installed on the upper surface of the conical drill bit 7. A second gear 12 is fixedly installed at the bottom end of the rotating rod 13. The first gear 11 meshes with the second gear 12. A plurality of L-shaped stop blocks 10 are fixedly installed at equal intervals in the circumferential direction on the upper surface of the conical drill bit 7. An arc-shaped sliding strip is arranged at the top end of the L-shaped stop block 10. A plurality of arc-shaped retaining grooves 16 are formed at equal intervals in the circumferential direction on the lower surface of the drill barrel 1. The arc-shaped sliding strip at the top end of the L-shaped stop block 10 is arranged inside the arc-shaped retaining groove 16 and slidably installed with its inner wall. A spring 17 is fixedly installed on the outer surface of the L-shaped stop block 10 close to the arc-shaped sliding strip. The other end of the spring 17 is fixedly connected to the inner wall of the arc-shaped retaining groove 16.

[0025] When the conical drill bit 7 drills to the specified depth, the user pulls the device upward by a certain distance through the handrail 3, and then controls the driving 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 soil particles between the drill barrel 1 and the inner wall of the hole to the lower part of the hole. When there are more soil particles below the hole, it will hinder the reverse rotation of the conical drill bit 7. At this time, relative movement occurs between the drill barrel 1 and the conical drill bit 7. The arc-shaped sliding strip at the top end of the L-shaped stop block 10 will slide to one end of the arc-shaped retaining groove 16 close to the spring 17 until the arc-shaped sliding strip abuts against the inner wall of the arc-shaped retaining groove 16. At this time, the conical drill bit 7 continues to reverse with the drill barrel 1.

[0026] In this embodiment, a driven gear 4 is fixedly installed through the upper surface of the mounting plate 2 at the top end of the drill barrel 1. A driving gear 5 is rotatably installed on the upper surface of the mounting plate 2. The driving gear 5 meshes with the driven gear 4. A driving motor 6 is fixedly installed on the lower surface of the mounting plate 2. The output end of the driving motor 6 penetrates through the upper surface of the mounting plate 2 and is fixedly installed with the rotation center of the driven gear 4. Two handrails 3 are symmetrically and fixedly installed on the upper surface of the mounting plate 2.

[0027] By starting the driving motor 6 to drive the driving gear 5 to rotate, the driving gear 5 drives the driven gear 4 to rotate forward, the driven gear 4 drives the drill barrel 1 to rotate forward, and the drill barrel 1 drives the conical drill bit 7 to rotate forward through the L-shaped stopper 10 and the arc-shaped slot 16. By the forward rotation of the drill barrel 1 and the conical drill bit 7, the spiral drill blade on their outer surfaces drills the soil surface. With this device, it is convenient to drill the saline-alkali soil and facilitate subsequent sampling.

[0028] In this embodiment, the diameter of the highest point where the arc-shaped scraping block 8 expands is larger than the diameter of the spiral drill blade. With this setting, it is convenient for the arc-shaped scraping block 8 to scrape soil particles.

[0029] In this embodiment, it should be noted that when the drill barrel 1 and the conical drill bit 7 rotate reversely, the spiral drill blade will drive the soil particles between the drill barrel 1 and the inner wall of the hole to the lower part of the hole. At the same time, the arc-shaped scraping block 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. With this setting, it is ensured that the arc-shaped scraping block 8 can accurately obtain samples at the corresponding depth without being mixed with other soil samples, avoiding affecting the accuracy of subsequent test data.

[0030] A method for using a device for sampling saline-alkali soil includes the following steps: S1: Before use, the user inserts the T-shaped slide bar 904 on the outer surface of the sample storage cylinder 9 into the inside of the T-shaped chute 901 and sets the sample storage cylinder 9 inside the drill barrel 1. When in use, the user places the device on the designated soil ground by holding the handrail 3, and the drill barrel 1 is in a vertical state; S2: By starting the driving motor 6 to drive the driving gear 5 to rotate, the driving gear 5 drives the driven gear 4 to rotate forward, the driven gear 4 drives the drill barrel 1 to rotate forward, and the drill barrel 1 drives the conical drill bit 7 to rotate forward through the L-shaped stopper 10 and the arc-shaped slot 16. By the forward rotation of the drill barrel 1 and the conical drill bit 7, the spiral drill blade on their outer surfaces drills the soil surface; S3: By controlling the driving motor 6 to rotate reversely, the drill barrel 1 and the conical drill bit 7 rotate reversely. When the drill barrel 1 and the conical drill bit 7 rotate reversely, the spiral drill blade will drive the soil particles between the drill barrel 1 and the inner wall of the hole to the lower part of the hole. When there are more soil particles in the lower part of the hole, it will hinder the reverse rotation of the conical drill bit 7. At this time, relative movement occurs between the drill barrel 1 and the conical drill bit 7; S4: Due to the relative movement between the drill barrel 1 and the conical drill bit 7, 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. The third gear 14 drives the arc-shaped scraping block 8 to expand through the sector gear 802. The soil on the soil hole wall is scraped into the inside of the feed channel 803 through the scraping opening and then enters the inside of the sample storage bin through the feed port 902 for temporary storage.

[0031] It should be noted that before the present invention is used, the user inserts the T-shaped slide bar 904 on the outer surface of the sample storage cylinder 9 into the inside of the T-shaped chute 901, and sets the sample storage cylinder 9 inside the drill cylinder 1. When in use, the user places the device on the designated soil ground through the handrail 3, and the drill cylinder 1 is in a vertical state; By starting the driving motor 6 to drive the driving gear 5 to rotate, the driving gear 5 drives the driven gear 4 to rotate forward. The driven gear 4 drives the drill cylinder 1 to rotate forward. The drill cylinder 1 drives the conical drill bit 7 to rotate forward through the L-shaped block 10 and the arc-shaped slot 16. The spiral drill edge on the outer surface of the drill cylinder 1 and the conical drill bit 7 drills the soil surface when rotating forward. This device facilitates drilling of saline-alkali soil and subsequent sampling; When the conical drill bit 7 drills to the designated depth, the user pulls the device upward a certain distance through the handrail 3, and then controls the driving motor 6 to reverse, so that the drill cylinder 1 and the conical drill bit 7 reverse. When the drill cylinder 1 and the conical drill bit 7 reverse, the spiral drill edge will drive the soil particles between the drill cylinder 1 and the inner wall of the hole to the lower part of the hole. When there are more soil particles at the lower part of the hole, it will hinder the reverse rotation of the conical drill bit 7. At this time, relative movement occurs between the drill cylinder 1 and the conical drill bit 7. The arc-shaped slide bar at the top of the L-shaped block 10 will slide to one end of the arc-shaped slot 16 close to the spring 17 until the arc-shaped slide bar abuts against the inner wall of the arc-shaped slot 16. At this time, the conical drill bit 7 continues to reverse with the drill cylinder 1; Due to the relative movement between the drill cylinder 1 and the conical drill bit 7, 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. The third gear 14 drives the arc-shaped scraping block 8 to unfold through the sector gear 802. When unfolding, the discharge end of the feed channel 803 will communicate with the feed port 902. At the same time, when the arc-shaped scraping block 8 unfolds, the scraping opening at the feed end of its feed channel 803 will contact the soil hole wall, and scrape the soil on the soil hole wall into the inside of the feed channel 803 through the scraping opening, and then enter the inside of the sample storage bin through the feed port 902 for temporary storage. This device can sample saline-alkali soil at multiple depths at one time and store them separately, greatly improving the efficiency of soil sampling and reducing the workload of the user; During sampling, the user can see whether the arc-shaped scraping block 8 unfolds through the port at the top of the drill cylinder 1. After sampling, by rotating the driving motor 6 forward, the arc-shaped scraping block 8 can be retracted into the drill cylinder 1 for subsequent sampling; the user manually takes out the sample storage cylinder 9 and then pours out the soil sample from the feed port 902 to complete the sampling.

[0032] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A soil sampling device for saline-alkali land, comprising a drill cylinder (1) and a mounting plate (2), wherein the drill cylinder (1) is rotatably mounted on the lower surface of the mounting plate (2), and a spiral drill edge is arranged on the circumferential outer surface of the drill cylinder (1), characterized in that, A plurality of openings (15) are evenly arranged on the circumferential outer surface of the drill pipe (1) in an up-and-down alignment. A rotating shaft (801) is rotatably installed between the top wall and the bottom wall of each of the plurality of openings (15). An arc-shaped scraping block (8) is fixedly installed on the circumferential outer surface of the rotating shaft (801). A feed flow channel (803) is formed inside the arc-shaped scraping block (8). A T-shaped sliding groove (901) is formed in the inner wall of the drill pipe (1) near the top end. A sample storage cylinder (9) is arranged inside the drill pipe (1). A T-shaped sliding strip (904) is fixedly installed on the outer surface of one side of the sample storage cylinder (9). The T-shaped sliding strip (904) is slidably installed on the inner wall of the T-shaped sliding groove (901). A plurality of partition plates (903) are fixedly installed 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 partition plates (903). A plurality of feed ports (902) are arranged on the outer surface of the sample storage cylinder (9) in an up-and-down alignment. The plurality of feed ports (902) are respectively communicated with the plurality of sample storage bins. The discharge end of the feed flow channel (803) is communicated with the sample storage bin through the feed port (902). A scraping opening is arranged at the feed end of the feed flow channel (803).

2. The soil sampling device for saline-alkali land according to claim 1, wherein The outer surface of the arc-shaped scraping block (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 arranged at the same center of a circle. The outer surface of the sample storage cylinder (9) is provided with an arc surface matched with the arc surface. The feed port (902) is arranged on one side of the arc surface. The arc surface and the rotating shaft (801) are arranged at the same center of a circle.

3. The soil sampling device for saline-alkali land according to claim 1, characterized in that An installation groove is formed in the circumferential outer surface of the rotating shaft (801) near one side of the sample storage cylinder (9). A sector gear (802) is fixedly installed between the inner walls of the installation 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 in the inner wall of the drill pipe (1) near the opening (15) in a pairwise up-and-down alignment. 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 sector gear (802). The third gear (14) is meshed with the sector gear (802).

4. The soil sampling device for saline-alkali land according to claim 3, characterized in that, A conical drill bit (7) is rotatably installed in the inner wall of the drill pipe (1) near the bottom end. A first gear (11) is fixedly installed on the upper surface of the conical drill bit (7). 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).

5. The soil sampling device for saline-alkali land according to claim 4, wherein A plurality of L-shaped stoppers (10) are fixedly installed at equal intervals in the circumferential direction on the upper surface of the conical drill bit (7). An arc-shaped sliding strip is provided at the top end of the L-shaped stopper (10). A plurality of arc-shaped retaining grooves (16) are provided at equal intervals in the circumferential direction on the lower surface of the drill barrel (1). The arc-shaped sliding strip at the top end of the L-shaped stopper (10) is arranged inside the arc-shaped retaining groove (16) and is slidably installed on its inner wall. A spring (17) is fixedly installed on the outer surface of the L-shaped stopper (10) close to the arc-shaped sliding strip. The other end of the spring (17) is fixedly connected to the inner wall of the arc-shaped retaining groove (16).

6. The soil sampling device for saline-alkali land according to claim 1, characterized in that, The top end of the drill barrel (1) penetrates through the upper surface of the mounting plate (2) and is fixedly installed with a driven gear (4). A driving gear (5) is rotatably installed on the upper surface of the mounting plate (2). The driving gear (5) meshes with the driven gear (4). A driving motor (6) is fixedly installed on the lower surface of the mounting plate (2). The output end of the driving motor (6) penetrates through the upper surface of the mounting plate (2) and is fixedly installed at the rotation center of the driven gear (4). Two handrails (3) are symmetrically and fixedly installed on the upper surface of the mounting plate (2).

7. The soil sampling device for saline-alkali land according to claim 1, characterized in that, The diameter of the highest point of the unfolded arc-shaped scraping block (8) is greater than the diameter of the spiral drill edge.

8. A method for using a soil sampling device for saline-alkali land, characterized in that, Adopt a soil sampling device for saline-alkali land according to any one of claims 1-7, including the following steps: S1: Before use, the user inserts the T-shaped sliding strip (904) on the outer surface of the sample storage cylinder (9) into the inside of the T-shaped sliding groove (901), sets the sample storage cylinder (9) inside the drill barrel (1). When in use, the user places the device on the designated soil ground by holding the handrail (3), and the drill barrel (1) is in a vertical state; S2: By starting the driving motor (6) to drive the driving gear (5) to rotate, the driving gear (5) drives the driven gear (4) to rotate forward. The driven gear (4) drives the drill barrel (1) to rotate forward. The drill barrel (1) drives the conical drill bit (7) to rotate forward through the transmission of torque by the L-shaped stopper (10) and the arc-shaped retaining groove (16). The spiral drill edge on its outer surface drills the soil surface through the forward rotation of the drill barrel (1) and the conical drill bit (7); S3: By controlling the driving motor (6) to reverse, 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 edge will drive the soil particles between the drill barrel (1) and the inner wall of the hole to the lower part of the hole. When there are more soil particles at the lower part of the hole, it will hinder the reverse rotation of the conical drill bit (7). At this time, relative movement occurs between the drill barrel (1) and the conical drill bit (7); S4: Through the relative movement between the drill barrel (1) and the conical drill bit (7), 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). The third gear (14) drives the arc-shaped scraping block (8) to unfold through the sector gear (802). The soil on the soil hole wall is scraped into the inside of the feed flow channel (803) through the scraping opening, and then enters the inside of the sample storage bin through the feed port (902) for temporary storage.

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