A portable electric soil sampler

Abstract

The application discloses a portable electric soil sampler, which comprises a fixing system, a power transmission system, a soil drilling system and a sealing system; the fixing system comprises a rack, a fixing pipe and a handle, and a soil storage pipe cover is arranged at one end of the fixing pipe; the power transmission system comprises a driving motor, a gear box and a transmission pipe, the transmission pipe is sleeved on the outer wall of the fixing pipe, the transmission pipe is connected with the gear in the gear box, and the driving motor is in transmission cooperation with the transmission pipe through the gear in the gear box; the soil drilling system comprises a soil storage pipe, a downhole drill bit and a soil layer protection pipe, the soil storage pipe is sleeved in the fixing pipe, the top end of the soil storage pipe is abutted with the soil storage pipe cover, the downhole drill bit is installed at the end of the transmission pipe away from the rack, and the downhole drill bit is designed in an integrated mode with the soil layer protection pipe; the soil storage pipe, the fixing pipe, the transmission pipe and the soil layer protection pipe are coaxially arranged. The application can not only complete the sampling of the soil of a certain depth at one time, but also can conveniently package the soil sample and minimize the disturbance to the original soil layer structure.

Description

Technical Field

[0001] This invention relates to the field of soil sampling technology, and in particular to a portable electric soil sampler. Background Technology

[0002] Soil sampling and analysis often requires taking soil samples from depths of 0 to 100 cm, with sampling becoming increasingly difficult at deeper layers. Existing soil samplers can only collect samples from approximately 20 cm below the surface at a time. Sampling deeper requires multiple drilling operations at the same point, which is not only time-consuming and labor-intensive but also inconsistent in depth. Furthermore, existing samplers lack soil storage devices; the soil sample must be removed from the shovel before the next operation can begin, and the removed sample must be stored separately, easily leading to mixing of samples from different depths. In addition, existing automatic soil samplers cause significant disturbance during sampling, affecting crop growth and disrupting the original soil structure, resulting in inaccurate sampling results. Summary of the Invention

[0003] The purpose of this invention is to provide a portable electric soil sampler to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a portable electric soil sampler, including a fixing system, a power transmission system, a soil drilling system, and a sealing system;

[0005] The fixing system includes a frame and a fixing pipe and a handle mounted on the frame, wherein a soil storage pipe cover is detachably installed at one end of the fixing pipe near the frame.

[0006] The power transmission system includes a drive motor, a gearbox, and a transmission pipe mounted on the frame. The transmission pipe is sleeved on the outer wall of the fixed pipe and is fixedly connected to a gear in the gearbox. The drive motor drives the transmission pipe through the gear in the gearbox.

[0007] The soil drilling system includes a soil storage pipe, a lowering drill bit, and a soil protection pipe. The soil storage pipe is slidably fitted inside the fixed pipe, and the top end of the soil storage pipe abuts against the soil storage pipe cover. The lowering drill bit is fixedly installed at the end of the transmission pipe away from the frame, and the lowering drill bit and the soil protection pipe are designed as an integral part. The soil storage pipe, the fixed pipe, the transmission pipe, and the soil protection pipe are arranged coaxially.

[0008] The sealing system is installed between the soil storage pipe and the lowering drill bit, and the sealing system is used to seal the bottom end of the soil storage pipe.

[0009] Preferably, the sealing system comprises a one-way bearing, a sealing device upper cover plate, a sealing device blade, a torque limiting dial and a sealing device lower cover plate;

[0010] The outer ring of the one-way bearing is fixedly installed at the top end of the sealing device upper cover plate, and the inner ring of the one-way bearing is sleeved and installed on the outer wall at the bottom of the fixed tube;

[0011] The torque limiting dial is fixedly installed on the lower probe head, the sealing device lower cover plate is internally provided with a ratchet groove, the torque limiting dial is arranged in the ratchet groove, and the torque limiting dial is in transmission cooperation with the sealing device lower cover plate;

[0012] The sealing device upper cover plate is internally provided with a guide groove and a fixing groove at the bottom end, the sealing device blade is fixedly provided with a guide tenon and a fixing tenon at the top end, the guide groove is matched with the guide tenon, the fixing groove is matched with the fixing tenon, and the sealing device upper cover plate is constrained from moving towards the axial direction through the guide groove and the guide tenon and the fixing groove and the fixing tenon;

[0013] The sealing device lower cover plate is internally provided with a circular arc groove at the top end, the sealing device blade is fixedly provided with a cylindrical tenon at the bottom end, the cylindrical tenon is matched with the circular arc groove, and the sealing device lower cover plate is constrained from moving in the circumferential direction through the circular arc groove and the cylindrical tenon.

[0014] Preferably, the torque limiting dial comprises a bolt, the bolt is internally provided with a mounting groove at the top end, a clamping roller is arranged in the mounting groove, the clamping roller is matched with the ratchet groove, both sides of the clamping roller are fixedly connected with springs, the ends of the springs are fixedly connected with the groove wall of the mounting groove, a short column is fixedly connected with the clamping roller, and the short column is rotationally connected with the groove wall of the mounting groove.

[0015] Preferably, the fixed tube is fixedly connected with a fixing piece at the top end, and the rack is internally provided with a connecting groove.

[0016] Preferably, the transmission tube is provided with a stirrer on one end close to the lower probe head and on the outer wall of the lower probe head.

[0017] Preferably, the soil storage pipe cover is internally provided with an exhaust hole at the top end.

[0018] Preferably, the soil storage pipe comprises an upper soil storage pipe and a lower soil storage pipe, the upper soil storage pipe is fixedly connected with a groove, the lower soil storage pipe is fixedly connected with a tenon, the groove is matched with the tenon, the inner wall of the fixed tube is internally provided with a limiting groove, the groove and the tenon in combination form a fixed strip which is slidingly installed in the limiting groove, and the soil storage pipe and the fixed tube are in sliding limiting cooperation through the limiting groove and the fixed strip.

[0019] Preferably, a scale is arranged on the outer wall of the soil storage pipe and the outer wall of the transmission pipe.

[0020] Preferably, the soil storage pipe is provided with a cutting blade at the bottom end, and a flange is arranged at the top end of the soil storage pipe, the flange is arranged in the down-the-hole drill head, and the sealer lower cover plate is sleeved on the flange.

[0021] Preferably, the diameter of the soil storage pipe is 2mm larger than that of the soil layer protection pipe.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. The soil storage pipe, the fixing pipe and the transmission pipe are designed in an integrated ring sleeve, so that the sampling of soil samples of a certain depth can be completed at one time, and the original state of the soil layer can be maintained to the maximum extent.

[0024] 2. The soil storage pipe and the fixing pipe are fixed by a clamping groove, so that the soil storage pipe can be easily assembled and disassembled, the soil storage pipe can be taken out after the completion of soil sampling, another soil storage pipe can be replaced to start the next operation, and the work efficiency is greatly improved.

[0025] 3. The sealing system is arranged, so that the soil sample taken out can be effectively prevented from sliding from the machine, and the invalid operation in the sampling process can be avoided. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 It is a whole structure diagram of the present application;

[0028] Figure 2 It is a schematic diagram of the internal structure of the present application;

[0029] Figure 3 It is a schematic diagram of the structure of the rack of the present application;

[0030] Figure 4 It is a schematic diagram of the structure of the transmission pipe of the present application;

[0031] Figure 5 It is a schematic diagram of the structure of the fixing pipe of the present application;

[0032] Figure 6 It is a schematic diagram of the structure of the soil storage pipe of the present application;

[0033] Figure 7The structure schematic diagram of the upper cover plate of the sealing device of the application is shown in the figure;

[0034] Figure 8 The structure schematic diagram of the sealing blade of the application is shown in the figure;

[0035] Figure 9 The structure schematic diagram of the lower cover plate of the sealing device of the application is shown in the figure;

[0036] Figure 10 The installation schematic diagram of the torsion limiting push piece and the lower cover plate of the sealing device of the application is shown in the figure;

[0037] Figure 11 The structure schematic diagram of the torsion limiting push piece of the application is shown in the figure;

[0038] Figure 12 The schematic diagram of the lower drilling head and its internal structure of the application is shown in the figure;

[0039] Figure 13 The schematic diagram of the soil storage pipe cover of the application is shown in the figure;

[0040] Among them, the soil storage pipe cover-1; the air vent-101; the screw thread-102; the driving motor-2; the gear box-3; the soil storage pipe-4; the upper soil storage pipe-401; the lower soil storage pipe-402; the fixed strip-403; the first scale-404; the fixed pipe-5; the fixed piece-501; the screw thread-502; the limiting groove-503; the shaft shoulder-504; the threaded hole-505; the fixed bearing-6; the transmission pipe-7; the first stirrup-701; the bolt hole-702; the second scale-703; the one-way bearing-8; the upper cover plate of the sealing device-9; the guide slot-901; the fixed slot-902; the sealing blade-10; the guide tenon-1001; the fixed tenon-1002; the cylindrical tenon-1003; the lower drilling head-11; the threaded hole-1101; the second stirrup-1102; the threaded hole-1103; the guide slot-1104; the soil layer protection pipe-12; the cutting blade-1201; the flange-1202; the torsion limiting push piece-13; the bolt-1301; the first spring-1302; the clamping roller-1303; the short column-1304; the second spring-1305; the lower cover plate of the sealing device-14; the circular arc groove-1401; the ratchet groove-1402; the circular arc recess-1403; the groove wall 1404; the handle-15; the rack-16; the connecting slot-1601; the threaded hole-1602. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the application will be apparently and completely described below with the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the application.

[0042] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] This invention provides a portable electric soil sampler, comprising a fixing system, a power transmission system, a soil drilling system, and a sealing system;

[0044] The fixing system includes a frame 16 and a fixing pipe 5 and a handle 15 mounted on the frame 16. A soil storage pipe cover 1 is provided at one end of the fixing pipe 5 near the frame 16. The soil storage pipe cover 1 is provided with an external thread 102 and can be screwed into the internal thread 502 at the upper end of the fixing pipe 5 for isolation and protection of the upper end of the soil storage pipe 4.

[0045] The power transmission system includes a drive motor 2, a gearbox 3, and a transmission pipe 7 mounted on the frame 16. A fixed bearing 6 is provided between the transmission pipe 7 and the fixed pipe 5. A shoulder 504 is provided at the lower end of the fixed pipe 5 to cooperate with the fixed bearing 6. The transmission pipe 7 is sleeved on the outer wall of the fixed pipe 5 through the fixed bearing 6. The transmission pipe 7 is fixedly connected to the gear in the gearbox 3. The drive motor 2 is driven by the gear in the gearbox 3 and the transmission pipe 7.

[0046] The soil drilling system includes a soil storage pipe 4, a lowering drill bit 11, and a soil protection pipe 12. The soil storage pipe 4 is slidably fitted inside the fixed pipe 5, and the top of the soil storage pipe 4 abuts against the soil storage pipe cover 1. The soil storage pipe cover 1 is used to bear the axial load generated during the upward accumulation of soil inside the soil storage pipe 4, and to prevent relative sliding between the soil storage pipe 4 and the fixed pipe 5 during operation. The lowering drill bit 11 has a threaded hole 1101 at the top and a threaded hole 702 below the transmission pipe 7. The lowering drill bit 11 and the transmission pipe 7 are connected by bolts. The lowering drill bit 11 and the soil protection pipe 12 are designed as an integral unit. The lowering drill bit 11 has a guide groove 1104. The soil storage pipe 4, the fixed pipe 5, the transmission pipe 7, and the soil protection pipe 12 are arranged coaxially.

[0047] The sealing system is located between the soil storage pipe 4 and the lowering drill bit 11. The sealing system is used to seal the bottom end of the soil storage pipe 4.

[0048] Furthermore, the sealing system includes a one-way bearing 8, a sealing upper cover plate 9, a sealing blade 10, a torque limiting lever 13, and a sealing lower cover plate 14.

[0049] The outer ring of the one-way bearing 8 is fixedly installed on the top of the cover plate 9 of the sealer, and the inner ring of the one-way bearing 8 is sleeved on the bottom outer wall of the fixed tube 5.

[0050] The bottom of the lower probe drill bit 11 has a threaded hole 1103. The torque limiting plate 13 is fixedly installed on the lower probe drill bit 11 through the threaded hole 1103. The lower cover plate 14 of the sealer has a ratchet 1402. The torque limiting plate 13 is set in the ratchet 1402. The torque limiting plate 13 is in transmission cooperation with the lower cover plate 14 of the sealer.

[0051] The top cover plate 9 of the sealing device has a guide groove 901 and a fixing groove 902 at its bottom end. The top end of the sealing blade 10 is fixedly provided with a guide tenon 1001 and a fixing tenon 1002. The guide groove 901 is adapted to the guide tenon 1001, and the fixing groove 902 is adapted to the fixing tenon 1002. The top cover plate 9 of the sealing device constrains the movement of the sealing blade 10 in the axial direction through the guide groove 901 and the guide tenon 1001, and the fixing groove 902 and the fixing tenon 1002.

[0052] The top of the sealing device's lower cover plate 14 is provided with an arc groove 1401, and the bottom of the sealing blade 10 is fixedly provided with a cylindrical tenon 1003. The cylindrical tenon 1003 is adapted to the arc groove 1401, and the sealing device's lower cover plate 14 restricts the circumferential movement of the sealing blade 10 through the arc groove 1401 and the cylindrical tenon 1003.

[0053] Furthermore, the torque limiting lever 13 includes a bolt 1301, with a mounting groove at the top of the bolt 1301. A clamping roller 1303 is installed in the mounting groove, and the clamping roller 1303 is adapted to the ratchet groove 1402. A first spring 1302 and a second spring 1305 are fixedly connected to both sides of the clamping roller 1303, and the ends of the first spring 1302 and the second spring 1305 are fixedly connected to the groove wall of the mounting groove. A short column 1304 is fixedly connected to the clamping roller 1303, and the short column 1304 is rotatably connected to the groove wall of the mounting groove.

[0054] Furthermore, a fixing plate 501 is fixedly connected to the top of the fixing tube 5, and a connecting groove 1601 is provided on the frame 16. A threaded hole 1602 is provided in the connecting groove 1601 for mounting bolts to cooperate with the threaded hole 505 on the fixing plate 501.

[0055] Furthermore, a first auger 701 and a second auger 1102 are respectively installed on the end of the transmission pipe 7 near the lowering drill bit 11 and on the outer wall of the lowering drill bit 11, to facilitate the discharge of soil excavated during the lowering drill bit 11's downward drilling process.

[0056] Furthermore, the top of the soil storage pipe cover 1 is provided with an exhaust hole 101, which can prevent the pressure difference between the inside of the soil storage pipe 4 and the outside.

[0057] Furthermore, the soil storage tube 4 includes an upper soil storage tube 401 and a lower soil storage tube 402. The upper soil storage tube 401 has a groove for fixed connection, and the lower soil storage tube 402 has a tenon for fixed connection. The groove and the tenon are compatible. A limiting groove 503 is provided on the inner wall of the fixing tube 5. The fixing strip 403, which is formed by the groove and the tenon, is slidably installed in the limiting groove 503. The soil storage tube 4 and the fixing tube 5 are slidably limited and engaged by the limiting groove 503 and the fixing strip 403. The soil storage tube 44 is a split design. When taking out the soil sample, simply separate the groove and the tenon to divide the soil storage tube 44 into two parts.

[0058] Furthermore, the outer wall of the soil storage pipe 4 and the outer wall of the transmission pipe 7 are respectively provided with a first scale 404 and a second scale 703, which facilitates the operator to observe the drilling depth during operation.

[0059] Furthermore, the bottom end of the soil protection pipe 12 is provided with a cutting edge 1201 to ensure that the soil is smoothly introduced during the descent. The top end of the soil protection pipe 12 is provided with a flange 1202, which is located inside the descent drill bit 11. The lower cover plate 14 of the sealing device is fitted on the flange 1202. The top end face of the flange 1202 is 20mm higher than the plane where the threaded hole 1103 is located in the descent drill bit 11. The flange 1202 is used to restrict the lower cover plate 14 of the sealing device and to allow the soil to enter the soil storage cylinder.

[0060] Furthermore, the diameter of the soil storage pipe 4 is 2mm larger than that of the soil layer protection pipe 12 to prevent blockage when excavating soil samples and piling them upwards.

[0061] The working principle of the sealing system of this invention is as follows:

[0062] When the drive motor 2 rotates in the forward direction, the downward drill bit 11 drives the torque limiting plate 13 to rotate in the forward direction. At this time, the clamping roller 1303 cannot flip over the groove wall. Under the action of the clamping roller 1303, the lower cover plate 14 of the sealer rotates in the forward direction with the downward drill bit 11. Under the joint constraint of the arc groove 1401 above the lower cover plate 14 of the sealer and the guide groove 901 below the upper cover plate 9 of the sealer, the sealing blade 10 moves outward relative to the outside, and the sealer opens. When the drive motor 2 reverses, the downward drill bit 11 drives the torque limiting plate 13 to reverse. At this time, the clamping roller 1303 on the torque limiting plate 13 will fall into the arc groove 1403. The clamping roller 1303 continues to drive the lower cover plate 14 of the sealer to reverse, while the one-way bearing 8 will constrain the upper cover plate 9 of the sealer to prevent it from reversing. Under the combined constraint of the arc groove 1401 above the lower cover plate 14 of the sealer and the guide groove 901 below the upper cover plate 9 of the sealer, the sealing blade 10 moves inward relative to the side, and the sealer closes. After the sealer is completely closed, the fixing groove below the upper cover plate 9 of the sealer... The fixing tenon 1002 above the sealing blade 10 and 902 are mutually constrained, preventing the sealing blade 10 from moving further inward. Due to the mutual constraint between the arc groove 1401 above the lower cover plate 14 of the sealer and the cylindrical tenon 1003 below the sealing blade 10, the lower cover plate 14 of the sealer is locked. At this time, the clamping roller 1303 will slide out of the arc groove 1403 under the torque of the drive motor 2, and the springs 1302 and 1305 will be compressed. The torque-limiting plate 13 and the ratchet groove 1402 will slide relative to each other, ensuring that the system will not be damaged under the torque of the drive motor 2. That is, when the drive motor 2 rotates forward, the sealing system opens; when the drive motor 2 rotates in reverse, the sealing system closes.

[0063] The working process of the portable electric soil sampler of this invention is as follows:

[0064] Step 1: After assembling the machine, the operator grips handle 15 to make the machine vertically aligned with the ground, turns on drive motor 2 to rotate forward and applies a certain pressure downward;

[0065] Step 2: After the machine has drilled down to a certain depth, reverse the drive motor 2. After hearing the torque limiting lever 13 slide and make a "click" sound, pull the machine out of the ground and turn off the drive motor 2.

[0066] Step 3: Unscrew the cap 1 of the soil storage tube 402, pull out the soil storage tube 4, and observe the scale on the soil storage tube 4 to know the soil sample depth.

[0067] Step 4: Cut the soil storage tube 4 in half and take out the soil sample.

[0068] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0069] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A portable electric soil sampler characterized by, The fixed system, the power transmission system, the earth drilling system and the sealing system are included. The fixed system includes a frame (16), a fixed pipe (5) and a handle (15) installed on the frame (16), and a soil storage pipe cover (1) detachably installed on one end of the fixed pipe (5) close to the frame (16). The power transmission system includes a driving motor (2), a gear box (3) and a transmission pipe (7) installed on the frame (16), the transmission pipe (7) is sleeved on the outer wall of the fixed pipe (5), the transmission pipe (7) is fixedly connected with the gear in the gear box (3), and the driving motor (2) is in transmission cooperation with the transmission pipe (7) through the gear in the gear box (3). The earth drilling system includes a soil storage pipe (4), a downhole drill bit (11) and a soil layer protection pipe (12), the soil storage pipe (4) is limitingly and slidably sleeved in the fixed pipe (5), the top end of the soil storage pipe (4) abuts against the soil storage pipe cover (1), the downhole drill bit (11) is fixedly installed on one end of the transmission pipe (7) away from the frame (16), and the downhole drill bit (11) is integrally designed with the soil layer protection pipe (12); the soil storage pipe (4), the fixed pipe (5), the transmission pipe (7) and the soil layer protection pipe (12) are coaxially arranged. The sealing system is arranged between the soil storage pipe (4) and the downhole drill bit (11), and is used for sealing the bottom end of the soil storage pipe (4). The sealing system includes a one-way bearing (8), a sealing device upper cover plate (9), a sealing blade (10), a torsion limiting piece (13) and a sealing device lower cover plate (14). The outer ring of the one-way bearing (8) is fixedly installed on the top end of the sealing device upper cover plate (9), and the inner ring of the one-way bearing (8) is sleeved and installed on the outer wall of the bottom of the fixed pipe (5). The torsion limiting piece (13) is fixedly installed on the downhole drill bit (11), the sealing device lower cover plate (14) is internally provided with a ratchet groove (1402), the torsion limiting piece (13) is arranged in the ratchet groove (1402), and the torsion limiting piece (13) is in transmission cooperation with the sealing device lower cover plate (14). The bottom end of the sealing device upper cover plate (9) is provided with a guide groove (901) and a fixing groove (902), the top end of the sealing blade (10) is fixedly provided with a guide tenon (1001) and a fixing tenon (1002), the guide groove (901) is matched with the guide tenon (1001), the fixing groove (902) is matched with the fixing tenon (1002), and the sealing device upper cover plate (9) restricts the movement of the sealing blade (10) to the axial direction through the guide groove (901) and the guide tenon (1001), and the fixing groove (902) and the fixing tenon (1002). The arc groove (1401) is arranged at the top end of the sealing cover lower cover plate (14), the cylindrical tenon (1003) is fixedly arranged at the bottom end of the sealing knife (10), the cylindrical tenon (1003) is matched with the arc groove (1401), and the sealing cover lower cover plate (14) is constrained from the circumferential movement of the sealing knife (10) through the arc groove (1401) and the cylindrical tenon (1003).

2. The portable electric soil sampler of claim 1, wherein, The torsion limiting dial (13) comprises a bolt (1301), the top end of the bolt (1301) is provided with a mounting groove, a clamping roller (1303) is arranged in the mounting groove, the clamping roller (1303) is matched with the ratchet groove (1402), the two sides of the clamping roller (1303) are fixedly connected with a first spring (1302) and a second spring (1305), and the ends of the first spring (1302) and the second spring (1305) are fixedly connected with the groove wall of the mounting groove; a short column (1304) is fixedly connected on the clamping roller (1303), and the short column (1304) is rotatably connected on the groove wall of the mounting groove.

3. The portable electric soil sampler of claim 1, wherein, The top end of the fixed pipe (5) is fixedly connected with a fixed sheet (501), and the rack (16) is provided with a connecting groove (1601).

4. The portable electric soil sampler of claim 1, wherein, The first stirring dragon (701) and the second stirring dragon (1102) are arranged on the outer wall of the lower drilling head (11) and the outer wall of the transmission pipe (7) respectively.

5. The portable electric soil sampler of claim 1, wherein, The top end of the soil storage pipe cover (1) is provided with an exhaust hole (101).

6. The portable electric soil sampler of claim 1, wherein, The soil storage pipe (4) comprises an upper soil storage pipe (401) and a lower soil storage pipe (402), the upper soil storage pipe (401) is fixedly connected with a groove, the lower soil storage pipe (402) is fixedly connected with a tenon, and the groove is matched with the tenon; a limiting groove (503) is arranged on the inner wall of the fixed pipe (5), the fixed strip (403) combined by the groove and the tenon is slidingly installed in the limiting groove (503), and the soil storage pipe (4) and the fixed pipe (5) are slidingly and limitingly matched through the limiting groove (503) and the fixed strip (403).

7. The portable electric soil sampler of claim 1, wherein, The first scale (404) and the second scale (703) are arranged on the outer wall of the soil storage pipe (4) and the outer wall of the transmission pipe (7) respectively.

8. The portable electric soil sampler of claim 1, wherein, The bottom end of the soil layer protection pipe (12) is provided with a cutting blade (1201), the top end of the soil layer protection pipe (12) is provided with a flange (1202), the flange (1202) is arranged in the lower drilling head (11), and the sealing cover lower cover plate (14) is sleeved on the flange (1202).

9. The portable electric soil sampler of claim 1, wherein, The diameter of the soil storage pipe (4) is 2mm larger than the diameter of the soil layer protection pipe (12).

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