A deep soil sampler

Abstract

A deep soil sampling instrument, relating to the field of soil testing and sampling technology, comprises a sample drawer movably inserted into a sampling hole on the periphery of a sampling rod; a driven shaft, the outer end of which is screwed onto the inner wall of the sampling rod via a bearing, and a lead screw thread on the outer wall of the driven shaft, with a nut threaded onto the lead screw thread and fixed to the bottom wall of the sample drawer; a driven bevel gear sleeved and fixed to the inner end of the driven shaft, meshing with a driving bevel gear, of which there are several driving bevel gears, sleeved and fixed onto the driving shaft from top to bottom, and the lower end of the driving shaft is screwed onto a drill bit via a bearing. This instrument collects waste soil generated during drilling, preventing waste soil from falling at different depths during sampling, which could affect the accuracy of soil testing at corresponding depths; it also effectively prevents waste soil from falling into the sample drawer from the discharge hole during drilling, reducing testing errors and improving testing accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil detection sampling, in particular to a deep soil collection instrument. BACKGROUND

[0002] Soil detection needs to use a sampling instrument to sample soil. When sampling deep soil, a drill bit is first used to drill a hole, and then a sampling tube or sampling device is used for deep sampling. Some sampling instruments can achieve one-time drilling and sampling, and the sampling efficiency is relatively high. However, when drilling, the soil discharged outside falls into the inside of the sampling tube opening, so that when the sampling tube reaches the required depth, the composition of the sampled soil is inaccurate, reducing the accuracy of the composition of the soil at the depth. SUMMARY

[0003] The present application aims at the defects and deficiencies of the prior art, and provides a deep soil collection instrument which can effectively solve the above problems.

[0004] To achieve the above purpose, the following technical scheme is adopted: it comprises a sampling rod and a drill bit; the lower end of the sampling rod is fixed with the drill bit, and the outer diameter of the top of the drill bit is greater than the outer diameter of the sampling rod; it further comprises:

[0005] A sample drawer is movably inserted into the sampling hole formed in the peripheral wall of the sampling rod; the peripheral wall of the sampling rod is also provided with a material falling hole, and the sampling hole and the material falling hole are arranged alternately up and down and left and right;

[0006] A driven shaft is rotatably connected to the inner wall of the sampling rod by a bearing at the outer end of the driven shaft, and a lead screw thread is arranged on the outer wall of the outer end of the driven shaft; a nut is threadedly connected to the lead screw thread, and the nut is fixed to the bottom wall of the sample drawer;

[0007] A driven bevel gear is fixedly connected to the inner end of the driven shaft, and the driven bevel gear is meshingly arranged with a driving bevel gear; the driving bevel gear is a plurality of driving bevel gears which are fixedly connected to the main shaft from top to bottom; the lower end of the main shaft is rotatably connected to the drill bit by a bearing, and the top end of the main shaft is connected to the output shaft of the sampling motor by a shaft coupling; the sampling motor is fixedly arranged in the inner rod by a motor fixing plate, and the connecting line of the sampling motor is electrically connected to the control panel above the motor fixing plate after passing through the motor fixing plate; the inner rod is arranged in the sampling rod and fixed with the drill bit; the driven shaft is rotatably connected to the rod wall of the inner rod by a bearing.

[0008] Adopt the above design scheme, when need sampling, the sampling rod is installed on the rotary drive mechanism and the lifting mechanism by the rotating top disc; the rotary drive mechanism and the lifting mechanism control the sampling rod to rotate and descend at the same time, drill the soil, and the drilled soil enters the sampling rod from the falling hole and is located at the outer position of the inner rod; when the required sampling depth is reached, the rotary drive mechanism and the lifting mechanism stop working, then the sampling motor works, the driving shaft rotates under the meshing action of the driving bevel gear and the driven bevel gear, thereby driving the wire nut to move outward, until the outer wall of the sampling drawer is embedded in the inner wall of the drill hole, at this time, the inner wall of the sampling drawer is still located in the sampling hole; then the lifting mechanism works to drive the sampling rod to rise slightly, the sampling drawer scrapes the inner wall of the drill hole in the rising process, then the sampling motor works reversely to drive the sampling drawer to be completely recycled into the sampling hole, until the outer wall of the sampling drawer is in the same vertical plane with the outer wall of the sampling tube 1.

[0009] Preferably, the sampling rod is connected with a rotary drive mechanism; the rotary drive mechanism comprises:

[0010] a driven gear, which is sleeved on the outer wall of the top end of the sampling rod;

[0011] a driving gear, which is arranged in meshing with the driven gear;

[0012] a rotary drive motor, whose output shaft is connected with the driving gear, and the rotary drive motor is connected with the lifting mechanism;

[0013] a rotating disc, whose lower rotating surface is fixed with the top end of the sampling rod, and the upper rotating surface is connected with the lifting mechanism.

[0014] Preferably, the lifting mechanism comprises:

[0015] a plurality of support guide rods, the bottom end of each of which is fixed with a ground nail;

[0016] a fixed top plate, which is fixed on the top end of the support guide rods;

[0017] an up-down adjusting plate, the four corners of which are movably sleeved on the support guide rods, and the rotating disc and the rotary drive motor are fixed on the bottom of the up-down adjusting plate;

[0018] a lifting drive motor, which is fixed on the bottom of the fixed top plate, and the output shaft thereof is connected with the lifting screw rod by a shaft coupling, and the lifting screw rod is threadedly connected with the up-down adjusting plate.

[0019] Preferably, the bottom end of the lifting screw rod is fixed with a base, and the base is arranged on the sampling ground.

[0020] Preferably, the outer side wall of the sample drawer is arc-shaped, and is arranged on the same arc surface as the outer wall of the sampling rod.

[0021] Preferably, the outer side wall of the sample drawer is gradually inwardly inclined from top to bottom, and the top end of the outer side wall of the sample drawer is arranged on the same vertical plane as the outer wall of the sampling rod.

[0022] Preferably, the top of the outer side wall of the sample drawer is integrally formed with a sampling guide plate, and the top of the sampling guide plate is provided with a sampling sawtooth.

[0023] Preferably, the inner side of the sampling guide plate is gradually inwardly inclined from outside to inside, effectively guiding the scraped soil into the sample drawer.

[0024] Preferably, the outer vertical sides of the material falling hole are fixed with material blocking plates, and the lower edges of the material blocking plates are lower than the upper part of the sample drawer.

[0025] Preferably, a rectangular opening is formed in the inner end of the driven shaft, a rectangular movable rod is movably inserted into the rectangular opening, and the driven bevel gear is sleeved and fixed on one end of the rectangular movable rod outside the driven shaft.

[0026] Preferably, a spring is arranged in the rectangular opening, one end of the spring is fixed to the inner wall of the rectangular opening, the other end is connected to the rectangular movable rod, an electromagnet is fixed to one end of the rectangular movable rod arranged in the rectangular opening, an iron block is magnetically attracted to the electromagnet and fixed to the inner wall of the rectangular opening.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] 1. The material falling hole is arranged to collect the waste soil generated during the drilling process, avoiding the falling of waste soil at different depths during sampling, and affecting the detection accuracy of the corresponding depth soil.

[0029] 2. The material discharge hole and sampling hole are set at different heights and staggered left and right, which effectively prevents waste soil from falling into the sample collection tray from the material discharge hole during drilling, reduces detection error and improves detection accuracy. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention.

[0031] Figure 2 This is a schematic diagram of the sampling rod, driving gear, driven gear, and inner rod in this invention.

[0032] Figure 3 This is a schematic diagram of the internal structure of the sampling rod in this invention.

[0033] Figure 4 This is a schematic diagram showing the connection of the sample drawer, driven shaft, driving bevel gear, driven bevel gear, and screw nut in this invention.

[0034] Figure 5 This is the present invention. Figure 1 Sectional view along the AA direction.

[0035] Figure 6 This is a schematic diagram showing the installation position of the baffle plate in this invention.

[0036] Figure 7 This is a front view of the baffle plate's location in this invention.

[0037] Figure 8 The working state diagram of the sample receiving drawer during sampling in this invention.

[0038] Figure 9 This is a schematic diagram of the sample receiving tray, sampling guide plate, and sampling saw teeth in Example 2.

[0039] Figure 10 This is a schematic diagram showing the connection of the sample receiving tray, sampling guide plate, sampling saw teeth, and sampling tube in Example 2.

[0040] Figure 11 yes Figure 10 Enlarged view of section B in the middle.

[0041] Figure 12 This is a schematic diagram of the internal structure of the driven bevel gear and driven shaft in Embodiment 3.

[0042] Explanation of reference numerals in the attached figures:

[0043] Sampling rod 1, material drop hole 1-1, sampling hole 1-2, drill bit 2, sample receiving drawer 3, inner rod 4, motor fixing plate 5, sampling motor 6, drive shaft 7, drive bevel gear 8, driven bevel gear 9, driven shaft 10, lead screw thread 10-1, rectangular through hole 10-2, nut 11, sampling guide plate 12, sampling saw teeth 13, driven gear 14, drive gear 15, rotary drive motor 16, turntable 17, lifting lead screw 18, base 19, lifting drive motor 20, upper and lower adjustment plate 21, support guide rod 22, ground nail 23, fixed top plate 24, baffle plate 25, rectangular movable rod 26, electromagnet 27, iron block 28, spring 29. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1:

[0046] like Figures 1-8 As shown, this specific embodiment adopts the following technical solution: It includes a sampling rod 1 and a drill bit 2; the lower end of the sampling rod 1 is fixed with the drill bit 2, and the outer diameter of the top of the drill bit 2 is slightly larger than the outer diameter of the sampling rod 1. After drilling is completed, the sampling rod 1 can be shaken slightly to cause the loose soil inside the borehole to fall off; a rotary drive mechanism is connected to the sampling rod 1; the rotary drive mechanism includes:

[0047] Driven gear 14, which is sleeved on the top outer wall of the sampling rod 1;

[0048] A driving gear 15 is meshed with a driven gear 14.

[0049] A rotary drive motor 16, the output shaft of which is connected to the drive gear 15, and the rotary drive motor 16 is connected to the lifting mechanism;

[0050] Turntable 17, wherein the turntable 17 adopts a planar thrust ball bearing, the lower rotating surface of which is fixed to the top end of the sampling rod 1, and the upper rotating surface of which is connected to the lifting mechanism;

[0051] The lifting mechanism includes:

[0052] Four support guide rods 22 are provided, and each of them is fixed with a ground nail 23 at its bottom end.

[0053] A fixed top plate 24 is fixed to the top of the supporting guide rod 22;

[0054] The upper and lower adjustment plate 21 is movably sleeved on the support guide rod 22 at its four corners, and the turntable 17 and the rotary drive motor 16 are both fixed to the bottom of the upper and lower adjustment plate 21; operation holes for controlling the control panel are opened on the upper and lower adjustment plate 21 at the positions corresponding to the turntable 17.

[0055] The lifting drive motor 20 is fixed to the bottom of the fixed top plate 24, and its output shaft is connected to the lifting screw 18 by a coupling. The lifting screw 18 is threadedly connected to the upper and lower adjustment plates 21. The lower end of the lifting screw 18 is fixed with a base 19, which is set on the sampling ground and plays an auxiliary support role.

[0056] It also includes:

[0057] The sample receiving tray 3 is movably inserted into the sampling holes 1-2 opened on the periphery of the sampling rod 1. The outer side wall of the sample receiving tray 3 has an arc-shaped structure, and it is on the same arc-shaped surface as the outer wall of the sampling rod 1, so that it forms a whole. The periphery of the sampling rod 1 is also provided with a material discharge hole 1-1. The sampling holes 1-2 and the material discharge hole 1-1 are arranged alternately vertically and horizontally. The outer vertical sides of the material discharge hole 1-1 are fixed with baffle plates 25, and the lower edge of the baffle plates 25 is set lower than the upper part of the sample receiving tray 3 to prevent the waste soil from falling into the sample receiving tray 3 when the waste soil enters from the material discharge hole 1-1.

[0058] Driven shaft 10, the outer end of which is screwed to the inner wall of sampling rod 1 by bearing, a lead screw thread 10-1 is provided on the outer wall of the outer end of driven shaft 10, a lead screw nut 11 is threaded on the lead screw thread 10-1, and the lead screw nut is fixed to the bottom wall of sample receiving tray 3.

[0059] Driven bevel gear 9 is sleeved and fixed to the inner end of driven shaft 10, and is meshed with driving bevel gear 8. There are several driving bevel gears 8, which are sleeved and fixed on driving shaft 7 from top to bottom. The lower end of driving shaft 7 is screwed to drill bit 2 using bearings, and its top end is connected to the output shaft of sampling motor 6 using couplings. Sampling motor 6 is mounted and fixed in inner rod 4 using motor mounting plate 5. The connection line of sampling motor 6 passes through motor mounting plate 5 and is electrically connected to control panel located above motor mounting plate 5. Inner rod 4 is a hollow cuboid structure, which is set inside sampling rod 1 and fixed to drill bit 2. The driven shaft 10 is rotatably connected to the rod wall of inner rod 4 using bearings.

[0060] Using the above design, when sampling is required, the sampling rod 1 is rotatably mounted on the rotary drive mechanism and lifting mechanism via the turntable 17 at its top. The rotary drive mechanism and lifting mechanism control the sampling rod 1 to rotate and descend simultaneously, drilling a hole in the soil. During drilling, the drilled soil enters the sampling rod 1 through the drop hole 1-1 and is positioned outside the inner rod 4. When the required sampling depth is reached, the rotary drive mechanism and lifting mechanism stop working, and then the sampling motor 6 is controlled to work, causing the drive shaft 7 to rotate, and the driven shaft 10 to rotate. The bevel gear 8 and driven bevel gear 9 rotate under meshing action, thereby driving the screw nut 11 to move the sample collection tray 3 outward until the outer wall of the sample collection tray 3 abuts against and embeds into the inner wall of the drill hole. At this time, the inner side of the sample collection tray 3 is still located in the sampling hole 1-2. Then, the lifting mechanism drives the sampling rod 1 to rise slightly. During the rising process, the sample collection tray 3 scrapes the material against the inner wall of the drill hole. Then, the sampling motor 6 works in the opposite direction, driving the sample collection tray 3 to be completely retracted into the sampling hole 1-2 until the outer wall of the sample collection tray 3 and the outer wall of the sampling tube 1 are on the same vertical plane.

[0061] Example 2:

[0062] See Figures 9-11 As shown, this embodiment is based on Embodiment 1, with further improvements to the sample collection tray 3. Specifically, the outer wall of the sample collection tray 3 is designed to gradually slope inward from top to bottom, and the top of the outer wall of the sample collection tray 3 is on the same vertical plane as the outer wall of the sampling rod 1. This structural design allows the sample collection tray 3 to better embed itself into the soil inside the borehole when it moves outward. A sampling guide plate 12 is integrally formed on the top of the outer wall of the sample collection tray 3. The inner side of the sampling guide plate 12 is designed to gradually slope inward from the outside to the inside, effectively guiding the scraped soil into the sample collection tray 3. The top of the sampling guide plate 12 is provided with sampling serrations 13, which can quickly scrape off the soil from the borehole wall when the sample collection tray 3 moves upward.

[0063] Example 3:

[0064] See Figure 12As shown, this embodiment is based on Embodiment 1, with further improvements to the structure of the driven shaft 10. Specifically, a rectangular through-hole 10-2 is opened in the inner end of the driven shaft 10, and a rectangular movable rod 26 is movably inserted into the rectangular through-hole 10-2. The driven bevel gear 9 is sleeved and fixed on the end of the movable rod 26 located outside the driven shaft 10. A spring 29 is installed inside the rectangular through-hole 10-2, with one end of the spring 29 fixed to the inner wall of the rectangular through-hole 10-2 and the other end connected to the rectangular movable rod 26. An electromagnet 27 is fixed on the end of the rectangular movable rod 26 located inside the rectangular through-hole 10-2. An iron block 28 is magnetically attracted to the electromagnet 27, and the iron block 28... Block 28 is fixed on the inner wall of the rectangular through-hole 10-2; the connecting line of the electromagnet 27 passes through the rectangular movable rod 26, the driven bevel gear 9, the drive shaft 7 and the motor fixing plate 5 in sequence, and is electrically connected to the control panel located above the motor fixing plate 5. Since the drive shaft 7 will have a certain pull on the internal connecting line when it rotates, the length of the connecting line needs to meet the rotation requirements of the drive shaft 7 (the rotation angle of the drive shaft 7 only needs to be sufficient to push the sample tray 3 out of the sampling rod 1 and make it contact the inner wall of the drill hole. Therefore, the rotation angle of the drive shaft 7 is relatively small, and the reserved length of the connecting line will not be very long, so there will be no problem of material waste or wire entanglement).

[0065] Using the above design scheme, when soil sampling at a fixed depth is required, the electromagnets 27 in other positions are energized and magnetized by controlling the control panel. At this time, the electromagnets 27 overcome the elastic force of the spring 29 and are magnetically attracted to the iron block 28, thereby driving the rectangular movable rod 26 to retract into the rectangular through-hole 10-2, and then driving the driven bevel gear 9 to disengage from the driving bevel gear 8. When the driving shaft 7 rotates, the driven shaft at the corresponding depth and the sample receiving tray 3 do not work.

[0066] When using this invention, after the sampling rod 1, the rotary drive mechanism, and the lifting mechanism are all fixedly installed, the entire assembly is fixed to the land to be sampled using ground nails 23. Then, the lifting drive motor 20 is started to work in the forward direction, driving the lifting screw 18 to rotate. The upper and lower adjustment plate 21 descends under the guidance of the support guide rod 22. At the same time, the rotary drive motor 16 is started to work, using the meshing of the drive gear 15 and the driven gear 14 to drive the sampling rod 1 to rotate. During the rotation, the drill bit 2 drills a hole in the land. Since the outer diameter of the top of the drill bit 2 is slightly larger than the outer diameter of the sampling rod 1, the drilling space will be slightly larger. During the drilling process, the waste soil generated by the sampling rod 1 enters the sampling rod 1 through the discharge hole 1-1 under the obstruction of the baffle plate 25. When the required sampling depth is reached, the lifting drive motor 20 and the rotation drive motor 16 are stopped. According to the required sampling depth, the electromagnets 27 at the remaining depth positions are energized and magnetized. At this time, the electromagnets 27 overcome the elastic force of the spring 29 and are magnetically attracted to the iron block 28, thereby driving the rectangular movable rod 26 to retract into the rectangular through-hole 10-2, and then driving the driven bevel gear 9 to disengage from the driving bevel gear 8. When the driven shaft 10 corresponding to the driving bevel gear 8 rotates, the driven shaft 7 will rotate. When the sample rod is not rotating, the corresponding sample collection tray 3 is not working. Then, the sampling motor 6 is started, driving the drive bevel gear 8 to rotate, which in turn drives the meshing driven bevel gear 9 to rotate, and further drives the driven shaft 10 to rotate. The rotation of the driven shaft 10 causes the corresponding sample collection tray 3 to move outward until the sampling serrations 13 on the outer wall of the sample collection tray 3 abut and embed themselves into the inner wall of the drill hole. At this time, the inner side of the sample collection tray 3 is still located within the sampling hole 1-2. Next, the lifting drive motor 20 is started to work in reverse, causing the sampling rod 1 to rise slightly. During the rising process, the sampling serrations 13 scrape the sample from the inner wall of the drill hole, completing the scraping process. Afterwards, the lifting drive motor 20 stops working, and the scraped soil becomes the sample soil. The sample soil falls into the receiving tray 3 along the sampling guide plate 12. Finally, the sampling motor 6 is started to work in reverse, driving the receiving tray 3 back into the sampling hole 1-2 until the outer wall of the receiving tray 3 is on the same vertical plane as the outer wall of the sampling tube 1. Finally, the lifting drive motor 20 is used to work in reverse, driving the sampling rod 1 out of the borehole. Then, the sampling motor 6 is used to extend the receiving tray 3 out of the sampling tube 1. The staff takes out the sample soil inside for testing, and then removes the sampling rod 1 from the upper and lower adjustment plate 21 and pours out the waste soil inside.

[0067] Compared with the prior art, the beneficial effects of this specific embodiment are:

[0068] 1. By using a material drop hole, the waste soil generated during the drilling process can be collected, avoiding the falling of waste soil at different depths during sampling, which would affect the accuracy of soil testing at the corresponding depth.

[0069] 2. The material discharge hole and sampling hole are set at different heights and staggered left and right, which effectively prevents waste soil from falling into the sample collection tray from the material discharge hole during drilling, reduces detection error and improves detection accuracy;

[0070] 3. Set the outer wall of the sample collection tray to be inclined, and combine it with an inclined sampling guide plate and sampling serrations to speed up soil collection efficiency;

[0071] 4. The meshing between the driven bevel gear and the driving bevel gear is set to be movable and adjustable, which can achieve selective sampling according to the required depth, avoid some invalid sampling, reduce the amount of soil removed from the borehole, and reduce the workload of backfilling the borehole later.

[0072] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A deep soil sampling device, comprising a sampling rod (1) and a drill bit (2); the lower end of the sampling rod (1) is fixed with the drill bit (2), the outer diameter of the top of the drill bit (2) being larger than the outer diameter of the sampling rod (1); characterized in that: It also includes: A sample receiving tray (3) is movably inserted into a sampling hole (1-2) on the periphery of a sampling rod (1); a material dropping hole (1-1) is also provided on the periphery of the sampling rod (1), and the sampling hole (1-2) and the material dropping hole (1-1) are arranged alternately in the upper and lower positions and staggered in the left and right; and baffle plates (25) are fixed on the vertical sides of the material dropping hole (1-1), and the lower edge of the baffle plate (25) is set lower than the upper part of the sample receiving tray (3) to prevent the waste soil from falling into the sample receiving tray (3) when the waste soil enters from the material dropping hole (1-1); Driven shaft (10), the outer end of which is screwed onto the inner wall of sampling rod (1) by bearing, a lead screw thread (10-1) is provided on the outer wall of the outer end of driven shaft (10), and a lead screw nut (11) is threaded onto the lead screw thread (10-1), and the lead screw nut (11) is fixed on the bottom wall of sample receiving tray (3); Driven bevel gear (9), which is sleeved and fixed on the inner end of driven shaft (10), and driven bevel gear (9) meshes with driving bevel gear (8). There are several driving bevel gears (8), which are sleeved and fixed on driving shaft (7) from top to bottom. The lower end of driving shaft (7) is screwed to drill bit (2) using bearing, and its top end is connected to the output shaft of sampling motor (6) using coupling. Sampling motor (6) is mounted and fixed in inner rod (4) using motor fixing plate (5). The connection line of sampling motor (6) passes through motor fixing plate (5) and is electrically connected to control panel located above motor fixing plate (5). Inner rod (4) is set inside sampling rod (1) and fixed to drill bit (2). The driven shaft (10) is rotatably connected to the rod wall of inner rod (4) using bearing.

2. The deep soil sampling instrument according to claim 1, characterized in that: A rotary drive mechanism is connected to the sampling rod (1); the rotary drive mechanism includes: Driven gear (14), which is sleeved on the top outer wall of the sampling rod (1); A driving gear (15) meshes with a driven gear (14); A rotary drive motor (16) is provided, the output shaft of which is connected to the drive gear (15), and the rotary drive motor (16) is connected to the lifting mechanism. Turntable (17), the lower rotating surface of the turntable (17) is fixed to the top of the sampling rod (1), and its upper rotating surface is connected to the lifting mechanism.

3. A deep soil sampling device according to claim 2, characterized in that: The lifting mechanism includes: Support guide rod (22), there are several support guide rods (22), and each of them is fixed with a ground nail (23) at its bottom end; A fixed top plate (24) is fixed to the top of the support guide rod (22); The upper and lower adjustment plate (21) has four corners that are movably sleeved on the support guide rod (22), and the turntable (17) and the rotary drive motor (16) are both fixed at the bottom of the upper and lower adjustment plate (21). The lifting drive motor (20) is fixed at the bottom of the fixed top plate (24), and its output shaft is connected to the lifting screw (18) by a coupling. The lifting screw (18) is threadedly connected to the upper and lower adjustment plates (21).

4. A deep soil sampling device according to claim 1, characterized in that: A rectangular through-hole (10-2) is provided in the inner end of the driven shaft (10). A rectangular movable rod (26) is movably inserted into the rectangular through-hole (10-2). The driven bevel gear (9) is sleeved and fixed on one end of the rectangular movable rod (26) located outside the driven shaft (10). A spring (29) is provided in the rectangular through-hole (10-2). One end of the spring (29) is fixed to the inner wall of the rectangular through-hole (10-2), and the other end is connected to the rectangular movable rod (26). An electromagnet (27) is fixed at one end of a rectangular movable rod (26) inside a rectangular through-hole (10-2). An iron block (28) is magnetically attracted to the electromagnet (27), and the iron block (28) is fixed on the inner wall of the rectangular through-hole (10-2). The connecting line of the electromagnet (27) passes through the rectangular movable rod (26), the driven bevel gear (9), the drive shaft (7), and the motor fixing plate (5) in sequence, and then is electrically connected to the control panel located above the motor fixing plate (5).

5. A deep soil sampling device according to claim 3, characterized in that: The lower end of the lifting screw (18) is fixed with a base (19), which is set on the sampling ground.

6. A deep soil sampling device according to claim 1, characterized in that: The outer wall of the sample receiving tray (3) is an arc-shaped structure, and it is set on the same arc-shaped surface as the outer wall of the sampling rod (1).

7. A deep soil sampling device according to claim 6, characterized in that: The outer wall of the sample receiving drawer (3) is arranged with a gradually inward trend from top to bottom, and the top of the outer wall of the sample receiving drawer (3) is arranged on the same vertical plane as the outer wall of the sampling rod (1).

8. A deep soil sampling device according to claim 7, characterized in that: The top of the outer wall of the sample receiving tray (3) is integrally formed with a sampling guide plate (12), and the top of the sampling guide plate (12) is provided with sampling serrations (13).

9. A deep soil sampling device according to claim 8, characterized in that: The inner side of the sampling guide plate (12) is arranged in a gradually inward tilting structure from the outside to the inside.

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