Sampling device for chemical analysis of soil

Abstract

The invention discloses a sampling device for soil chemical analysis, and relates to the technical field of soil sampling, the sampling device for soil chemical analysis comprises a moving seat, and the upper end of the moving seat is connected with a lifting platform through a lifting assembly in a lifting manner. After sampling, through mutual cooperation of a separation assembly, a transmission assembly, a first rotating assembly and a second rotating assembly, excessive soil filled in a sampling barrel after sampling is stirred, and meanwhile, through rotation of a rotary separation head, the soil filled in the sampling barrel is crushed and separated and falls into a backfilling box; through the guiding effect of the backfilling box, the soil is backfilled into a sampling hole in the soil, and through the stirring and crushing effects in the whole backfilling process, the backfilling efficiency of the redundant soil after sampling is guaranteed, and meanwhile more smooth backfilling operation of the soil is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, in particular to a sampling device for soil chemical analysis. Background Art

[0002] Soil chemical analysis refers to the method of determining the nutrient content of soil, comparing it with the reference standard, judging the nutrient supply of soil, and indirectly judging the nutritional status of plants. It is an important means of guiding fertilization and can be divided into two categories: conventional analysis and rapid test.

[0003] During the soil chemical analysis operation, a sampling device is needed to sample the soil at a designated location. In order to solve the problem of uneven foundation after soil sampling, the excess soil after sampling needs to be backfilled. During the backfilling operation, firstly, the sampled soil is compacted inside the sampling tube, and it is difficult to separate it from the sampling tube, which affects the efficiency of backfilling. Secondly, the excess soil separated from the sampling tube is often in block shape due to the squeezing effect, which makes backfilling more difficult. For this reason, we propose a sampling device for soil chemical analysis. Summary of the invention

[0004] The object of the present invention is to provide a sampling device for soil chemical analysis to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a sampling device for soil chemical analysis, comprising a movable seat, the upper end of which is liftably connected to a lifting platform through a lifting assembly, a sampling cylinder is rotatably connected to the lifting platform, a slot for assisting in material collection is provided on one side of the sampling cylinder, a driving motor for driving the sampling cylinder is installed on the lifting platform, and further comprising:

[0006] A backfill box is arranged above the moving seat and is used for assisting in backfilling the soil after sampling. The backfill box is arranged in a funnel shape. A moving assembly for moving the backfill box is arranged on the moving seat. A sampling assembly for sampling and a separation assembly for assisting in separating the soil at the bottom of the sampling tube are arranged on the backfill box.

[0007] The sampling assembly includes a mounting frame fixed to the upper end of the backfill box, a mounting plate is provided on one side of the mounting frame, the mounting plate and the mounting frame are connected and fixed by multiple groups of connecting rods, multiple groups of mounting cylinders are arranged in a vertical direction on one side of the mounting plate, the mounting cylinders are rotatably connected to the mounting plate, a sampling cylinder is detachably mounted on one end of the mounting cylinder by means of bolts, multiple groups of stirring plates for stirring and separating other soils after sampling are fixed on the outer side of the sampling cylinder, and a first rotating assembly for rotating the mounting cylinder is provided on the mounting plate;

[0008] The separation assembly includes a strip frame fixed inside the backfill box, a mounting shaft is arranged above the strip frame, a rotating separation head is fixed to one end of the mounting shaft, a slope for abutting and squeezing the front end of the sampling tube is provided at the front end of the rotating separation head, the other end of the mounting shaft is telescopically connected to the strip frame through a telescopic assembly, and a second rotating assembly for rotating the mounting shaft is arranged on the strip frame.

[0009] Preferably, the first rotating assembly includes a first gear fixed to one end of the mounting tube, one side of the mounting plate is connected to a first rack via a connecting assembly, the first gear and the first rack are meshed with each other, and one side of the mounting plate is provided with a pushing assembly for pushing the first rack.

[0010] Preferably, the pushing assembly includes a strip plate arranged on one side of the mounting plate, the strip plate and the second rotating assembly are connected for transmission via a transmission assembly, the first rack is fixed to one side of the strip plate, a transmission plate is fixed to one side of the strip plate, and an extrusion assembly for extruding the transmission plate is provided on the mounting plate.

[0011] Preferably, the extrusion assembly includes a driving disk rotatably connected to one side of the mounting plate, a plurality of protrusions for pushing the transmission plate against each other are fixed to the outer side of the driving disk, and a mounting motor for driving the driving disk is mounted on the mounting plate.

[0012] Preferably, the connecting assembly includes two groups of first fixing frames fixed on one side of the mounting plate, two groups of first fixing blocks are arranged between the two groups of first fixing frames, the two groups of first fixing blocks are respectively fixed on both sides of the first rack, a first guide rod is slidably connected to the first fixing block, the first guide rod is fixed between the two groups of first fixing frames, and a first spring is sleeved on the outer side of the first guide rod.

[0013] Preferably, the telescopic assembly includes a spline shaft rotatably connected to the strip frame, one end of the spline shaft is slidably connected to a spline sleeve, the mounting shaft is fixed to one end of the spline sleeve, a retaining ring is fixed to the outer side of the spline sleeve, and a second spring is provided on the outer side of the spline sleeve, and both ends of the second spring are respectively set to resist the retaining ring and the strip frame.

[0014] Preferably, the second rotating assembly includes a second gear fixed to one end of the spline shaft, the lower end of the strip frame is connected to a second rack via a guide assembly, and the second gear and the second rack are meshed with each other.

[0015] Preferably, the guide assembly includes two groups of second fixed frames fixed to the lower end of the strip frame, two groups of second fixed blocks are arranged between the two groups of second fixed frames, the two groups of second fixed blocks are respectively fixed on both sides of the second rack, the second fixed blocks are slidably connected with a second guide rod, and the second guide rod is fixed between the two groups of second fixed frames.

[0016] Preferably, the transmission assembly includes a connecting plate, the second rack is fixed to one side of the connecting plate, an operating plate is fixed to one end of the connecting plate, an inclined groove is provided on the operating plate, a transmission pin is slidably connected to the inclined groove, and one end of the transmission pin is fixed to the strip plate.

[0017] Preferably, the moving assembly includes two groups of third fixed frames fixed to the upper end of the moving seat, a moving plate is arranged between the two groups of the third fixed frames, the moving plate is fixed to one side of the backfill box, a screw rod is rotatably connected between the two groups of the third fixed frames, the moving plate is threadedly engaged with the screw rod, a connecting motor for driving the screw rod is installed on the third fixed frame, a round rod is slidably connected to the moving plate, and the round rod is fixed between the two groups of the third fixed frames.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the process of soil chemical analysis, the present invention uses a sampling component to fill the soil at different positions after sampling in each group of sampling tubes through the action of multiple groups of sampling tubes, thereby completing the sampling operation of soil at different positions. After sampling, the separation component, the transmission component, the first rotating component and the second rotating component cooperate with each other to stir the excess soil filled in the sampling tube after sampling. At the same time, the rotation of the rotary separation head breaks and separates the soil filled in the sampling tube and drops it into the backfill box. Through the guiding action of the backfill box, the soil is backfilled into the sampling holes on the soil. The entire backfilling process ensures the efficiency of backfilling the excess soil after sampling and facilitates a smoother backfilling operation of the soil through the stirring and crushing actions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure of the mobile seat of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the mobile component of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the sampling component and the separation component of the present invention;

[0024] Figure 5It is a schematic diagram of the transmission assembly structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the first rotating assembly, the pushing assembly, the extruding assembly and the connecting assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the telescopic assembly structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the second rotating assembly and the guide assembly of the present invention;

[0028] Fig. 9 It is a schematic diagram of the state before the rotary separation head and the sampling tube of the present invention abut against each other;

[0029] Fig.10 It is a schematic diagram of the transmission contraction state when the rotary separation head of the present invention abuts against the sampling tube;

[0030] Fig.11 This is a schematic diagram of the state in which the rotary separation head of the present invention moves into the interior of the sampling cylinder.

[0031] In the figure: 101, moving seat; 102, lifting assembly; 103, lifting platform; 104, sampling tube; 105, slotting; 106, driving motor; 2, backfill box; 301, third fixed frame; 302, moving plate; 303, screw rod; 304, connecting motor; 305, round rod; 401, mounting frame; 402, mounting plate; 403, connecting rod; 404, mounting tube; 405, sampling tube; 406, stirring plate; 501, first gear; 502, first rack; 601, first fixed frame; 602, first fixed block; 603, first guide rod; 60 4. first spring; 701. strip plate; 702. transmission plate; 801. drive disk; 802. protrusion; 803. mounting motor; 901. strip frame; 902. mounting shaft; 903. rotary separation head; 1001. spline shaft; 1002. spline sleeve; 1003. retaining ring; 1004. second spring; 1101. second gear; 1102. second rack; 1201. second fixed frame; 1202. second fixed block; 1203. second guide rod; 1301. connecting plate; 1302. operating plate; 1303. inclined groove; 1304. transmission pin. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] See also Figure 1-Figure 11 The soil chemical analysis sampling device shown in the figure includes a movable seat 101, the upper end of the movable seat 101 is connected to a lifting platform 103 through a lifting assembly 102, a sampling barrel 104 is rotatably connected to the lifting platform 103, a slot 105 for assisting material collection is provided on one side of the sampling barrel 104, a driving motor 106 for driving the sampling barrel 104 is installed on the lifting platform 103, and also includes:

[0035] A backfill box 2 is arranged above the moving seat 101 for assisting in backfilling the soil after sampling. The backfill box 2 is arranged in a funnel shape. A moving assembly for moving the backfill box 2 is arranged on the moving seat 101. A sampling assembly for sampling and a separation assembly for assisting in separating the soil at the bottom of the sampling tube 104 are arranged on the backfill box 2.

[0036] The sampling assembly includes a mounting frame 401 fixed to the upper end of the backfill box 2, a mounting plate 402 is provided on one side of the mounting frame 401, the mounting plate 402 and the mounting frame 401 are connected and fixed by multiple groups of connecting rods 403, multiple groups of mounting cylinders 404 are arranged in a vertical direction on one side of the mounting plate 402, the mounting cylinders 404 are rotatably connected to the mounting plate 402, a sampling cylinder 405 is detachably installed on one end of the mounting cylinder 404 by means of bolts, multiple groups of stirring plates 406 for stirring and separating other soils after sampling are fixed on the outer side of the sampling cylinder 405, and a first rotating assembly for rotating the mounting cylinder 404 is provided on the mounting plate 402;

[0037] The separation assembly includes a strip frame 901 fixed inside the backfill box 2, a mounting shaft 902 is arranged above the strip frame 901, a rotating separation head 903 is fixed to one end of the mounting shaft 902, a front end of the rotating separation head 903 is provided with an inclined surface for abutting and squeezing against the front end of the sampling tube 104, the other end of the mounting shaft 902 is telescopically connected to the strip frame 901 through a telescopic assembly, and a second rotating assembly for rotating the mounting shaft 902 is arranged on the strip frame 901;

[0038] It should be noted here that: during the soil chemical analysis operation, the soil at different positions after sampling is sampled and filled in each group of sampling tubes 405 through the sampling component, thereby completing the sampling operation of the soil at different positions. After sampling, the separation component, the transmission component, the first rotating component and the second rotating component cooperate with each other to stir the excess soil filled in the sampling tube 104 after sampling. At the same time, the soil filled in the sampling tube 104 is crushed and separated and falls into the backfill box 2 through the rotation of the rotating separation head 903. Through the guiding effect of the backfill box 2, it is backfilled into the sampling holes on the soil. The entire backfilling process ensures the efficiency of backfilling the excess soil after sampling through the stirring and crushing effects, while facilitating a smoother backfilling operation of the soil.

[0039] Preferably, the first rotating assembly includes a first gear 501 fixed to one end of the mounting tube 404, one side of the mounting plate 402 is connected to a first rack 502 through a connecting assembly, the first gear 501 and the first rack 502 are meshed with each other, and one side of the mounting plate 402 is provided with a pushing assembly for pushing the first rack 502;

[0040] It should be noted here that: through the pushing component and the squeezing component, the transmission plate 702 and the strip plate 701 are made to reciprocate up and down as the driving disk 801 rotates. During the reciprocating motion of the strip plate 701, the first rack 502 and the first gear 501 are mutually engaged to drive each group of mounting cylinders 404 and the sampling cylinder 405 on the mounting cylinder 404 to reciprocate.

[0041] Preferably, the pushing assembly includes a strip plate 701 arranged on one side of the mounting plate 402, the strip plate 701 and the second rotating assembly are connected and transmitted via a transmission assembly, the first rack 502 is fixed to one side of the strip plate 701, a transmission plate 702 is fixed to one side of the strip plate 701, and an extrusion assembly for extruding the transmission plate 702 is provided on the mounting plate 402; the extrusion assembly includes a driving disk 801 rotatably connected to one side of the mounting plate 402, a plurality of protrusions 802 for pushing the transmission plate 702 against each other are fixed on the outer side of the driving disk 801, and a mounting motor 803 for driving the driving disk 801 is installed on the mounting plate 402;

[0042] It should be noted here that: by installing the motor 803, the driving disk 801 is rotated. During the rotation of the driving disk 801, the driving plate 702 and the strip plate 701 are reciprocated up and down as the driving disk 801 rotates, through the mutual pushing action of each group of protrusions 802 and the transmission plate 702 in turn and the resetting action of the connecting component on the transmission plate 702 after the force is applied.

[0043] Preferably, the connecting assembly includes two groups of first fixing frames 601 fixed to one side of the mounting plate 402, two groups of first fixing blocks 602 are arranged between the two groups of first fixing frames 601, the two groups of first fixing blocks 602 are respectively fixed to the two sides of the first rack 502, a first guide rod 603 is slidably connected to the first fixing block 602, the first guide rod 603 is fixed between the two groups of first fixing frames 601, and a first spring 604 is sleeved on the outer side of the first guide rod 603;

[0044] It should be noted here that: the first fixed block 602 and the first guide rod 603 between the two groups of first fixed frames 601 are used to assist the sliding guidance of the first rack 502 after being subjected to force, and the first spring 604 is used to assist the reset movement of the first rack 502 after the movement. During the guiding movement of the first rack 502, the transmission plate 702 and the strip plate 701 are driven to rise and fall synchronously.

[0045] Preferably, the telescopic assembly includes a spline shaft 1001 rotatably connected to the strip frame 901, one end of the spline shaft 1001 is slidably connected to a spline sleeve 1002, the mounting shaft 902 is fixed to one end of the spline sleeve 1002, a retaining ring 1003 is fixed to the outer side of the spline sleeve 1002, and a second spring 1004 is sleeved on the outer side of the spline sleeve 1002, and the two ends of the second spring 1004 are respectively set against the retaining ring 1003 and the strip frame 901;

[0046] It should be noted here that: the spline shaft 1001 and the spline sleeve 1002 facilitate the telescopic connection between the auxiliary installation shaft 902 and the strip frame 901, and the retaining ring 1003 and the second spring 1004 facilitate the reset movement of the installation shaft 902 after the contraction movement, and the spline shaft 1001 and the spline sleeve 1002 can be used to rotate the installation shaft 902 while maintaining the telescopic movement.

[0047] Preferably, the second rotating assembly includes a second gear 1101 fixed to one end of the spline shaft 1001, and the lower end of the strip frame 901 is connected to a second rack 1102 through a guide assembly, and the second gear 1101 and the second rack 1102 are meshed with each other;

[0048] It should be noted here that: during the up and down reciprocating motion of the strip plate 701, the connecting plate 1301 and the second rack 1102 at one end of the connecting plate 1301 are driven to reciprocate through the transmission assembly. During the reciprocating motion of the second rack 1102, the spline shaft 1001 is driven to rotate through the mutual engagement transmission between the second rack 1102 and the second gear 1101. During the rotation of the spline shaft 1001, the connection transmission action between the spline shaft 1001 and the spline sleeve 1002 drives the installation shaft 902 and the rotating separation head 903 to reciprocate synchronously.

[0049] Preferably, the guide assembly includes two groups of second fixing frames 1201 fixed to the lower end of the strip frame 901, two groups of second fixing blocks 1202 are arranged between the two groups of second fixing frames 1201, the two groups of second fixing blocks 1202 are respectively fixed to the two sides of the second rack 1102, and the second fixing blocks 1202 are slidably connected to the second guide rod 1203, and the second guide rod 1203 is fixed between the two groups of second fixing frames 1201;

[0050] It should be noted here that the second fixing block 1202 and the second guide rod 1203 between the two sets of second fixing frames 1201 are used to assist the sliding guidance of the second rack 1102 after being subjected to force.

[0051] Preferably, the transmission assembly includes a connecting plate 1301, the second rack 1102 is fixed to one side of the connecting plate 1301, an operating plate 1302 is fixed to one end of the connecting plate 1301, an inclined groove 1303 is provided on the operating plate 1302, a transmission pin 1304 is slidably connected to the inclined groove 1303, and one end of the transmission pin 1304 is fixed to the strip plate 701;

[0052] It should be noted here that: during the up and down reciprocating motion of the strip plate 701, the driving pin 1304 interacts with the inclined groove 1303 on the operating plate 1302 to drive the connecting plate 1301 and the second rack 1102 at one end of the connecting plate 1301 to reciprocate.

[0053] Preferably, the moving assembly includes two groups of third fixing frames 301 fixed to the upper end of the moving seat 101, a moving plate 302 is arranged between the two groups of third fixing frames 301, the moving plate 302 is fixed to one side of the backfill box 2, a screw rod 303 is rotatably connected between the two groups of third fixing frames 301, the moving plate 302 is threadedly engaged and connected to the screw rod 303, a connecting motor 304 for driving the screw rod 303 is installed on the third fixing frame 301, a round rod 305 is slidably connected to the moving plate 302, and the round rod 305 is fixed between the two groups of third fixing frames 301;

[0054] It should be noted here that: by connecting the motor 304, the screw rod 303 is driven to rotate. During the rotation of the screw rod 303, the mutual meshing transmission between the screw rod 303 and the movable plate 302 and the sliding guiding effect of the round rod 305 are used to move the movable plate 302 and the backfill box 2 after being subjected to force.

[0055] In this scheme: a sampling device for soil chemical analysis comprises the following steps:

[0056] During the soil chemical analysis operation, the sampling device is used to perform a soil sampling operation. During the operation, the entire device is moved to a designated position by moving the moving seat 101. After the movement is completed, the lifting platform 103 and the sampling tube 104 are driven to descend by the lifting assembly 102. During the descent, the sampling tube 104 is driven to rotate by the driving motor 106. The sampling tube 104 is rotated into the soil at a designated position by descending and rotating the sampling tube 104. After the sampling tube 104 is rotated into the soil to a certain depth, the lifting platform 103 and the sampling tube 104 are driven to rise to a certain height by the lifting assembly 102. At this time, the interior of the sampling tube 104 is filled with soil, and the soil sampling operation is completed.

[0057] After the soil sampling is completed, the backfill box 2 is driven to move above the moving seat 101 through the moving assembly, so that the backfill box 2 moves to the bottom of the sampling tube 104. During the movement of the backfill box 2, the mounting frame 401, the mounting plate 402 and the multiple groups of connecting rods 403 drive the groups of mounting tubes 404 and the sampling tubes 405 at the front end of the mounting tubes 404 to move synchronously. During the movement, the front end of the sampling tube 405 is inserted into the soil filled on the sampling tube 104 through the slot 105. The soil at different positions after sampling is sampled and filled in the interior of each group of sampling tubes 405 through the action of the multiple groups of sampling tubes 405, thereby completing the sampling operation of the soil at different positions.

[0058] During the movement of the backfill box 2, the connection between the strip frame 901 and the telescopic assembly drives the installation shaft 902 and the rotating separation head 903 to move synchronously. Fig. 9 During the movement of the rotating separation head 903, the inclined surface of the rotating separation head 903 first abuts against the front end of the sampling tube 104, pushing the rotating separation head 903 toward the strip frame 901 for contraction movement. Fig.10 As the rotating separation head 903 continues to move, the front end of the rotating separation head 903 abuts against the bottom of the soil filled in the sampling tube 104 through the elastic squeezing effect of the second spring 1004 on the telescopic assembly. Fig.11After each group of sampling tubes 405 is inserted and the sampling is completed, the driving disk 801 is rotated by installing the motor 803. During the rotation of the driving disk 801, the driving plate 702 and the strip plate 701 are reciprocated up and down with the rotation of the driving disk 801 through the push action of each group of protrusions 802 and the reset action of the connecting assembly on the driving plate 702 after the force is applied. During the reciprocating motion of the strip plate 701, the first rack 502 and the first gear 50 1 is meshed with each other to drive each group of mounting tubes 404 and the sampling tubes 405 on the mounting tubes 404 to reciprocate. At this time, the sampling tubes 405 are inserted into the sampling tube 104 to fill the soil. Through the rotation of the sampling tube 405, each group of stirring plates 406 is driven to stir the excess soil filled in the sampling tube 104 after sampling, and the multiple groups of soil in the auxiliary sampling tube 104 are separated from the sampling tube 104 and fall down. In the process of the reciprocating movement of the strip plate 701 up and down, The interaction between the transmission pin 1304 and the inclined groove 1303 on the operating plate 1302 drives the connecting plate 1301 and the second rack 1102 at one end of the connecting plate 1301 to reciprocate. During the reciprocating motion of the second rack 1102, the mutual meshing transmission between the second rack 1102 and the second gear 1101 drives the spline shaft 1001 to rotate. During the rotation of the spline shaft 1001, the connection transmission between the spline shaft 1001 and the spline sleeve 1002 is used to drive the spline shaft 1001 to rotate. The movable installation shaft 902 and the rotating separation head 903 reciprocate synchronously. Because the rotating separation head 903 is kept against the bottom of the soil filled in the sampling tube 104 under the elastic force of the second spring 1004 on the telescopic assembly, the soil filled in the sampling tube 104 is broken and separated through the rotation of the rotating separation head 903 and falls into the backfill box 2. Through the guiding effect of the backfill box 2, it is backfilled into the sampling holes on the soil, avoiding the occurrence of problems such as uneven foundation after soil sampling.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sampling device for soil chemical analysis, comprising: A movable seat (101), the upper end of the movable seat (101) is connected to a lifting platform (103) via a lifting assembly (102) in a liftable manner, a sampling cylinder (104) is rotatably connected to the lifting platform (103), a slot (105) for assisting material collection is provided on one side of the sampling cylinder (104), and a driving motor (106) for driving the sampling cylinder (104) is installed on the lifting platform (103); It is characterized by further comprising: A backfill box (2) is arranged above the moving seat (101) and is used to assist in backfilling the soil after sampling. The backfill box (2) is arranged in a funnel shape. A moving assembly for moving the backfill box (2) is arranged on the moving seat (101). A sampling assembly for sampling and a separation assembly for assisting in separating the soil at the bottom of the sampling tube (104) are arranged on the backfill box (2); The sampling assembly comprises a mounting frame (401) fixed to the upper end of the backfill box (2); a mounting plate (402) is arranged on one side of the mounting frame (401); the mounting plate (402) and the mounting frame (401) are connected and fixed via a plurality of connecting rods (403); a plurality of mounting cylinders (404) are arranged in a vertical direction on one side of the mounting plate (402); the mounting cylinders (404) are rotatably connected to the mounting plate (402); a sampling cylinder (405) is detachably mounted on one end of the mounting cylinder (404) via bolts; a plurality of stirring plates (406) for stirring and separating other soils after sampling are fixed on the outer side of the sampling cylinder (405); and a first rotating assembly for rotating the mounting cylinder (404) is arranged on the mounting plate (402); The separation assembly comprises a strip frame (901) fixed inside the backfill box (2), a mounting shaft (902) is arranged above the strip frame (901), a rotating separation head (903) is fixed to one end of the mounting shaft (902), a front end of the rotating separation head (903) is provided with an inclined surface for abutting and squeezing against the front end of the sampling tube (104), the other end of the mounting shaft (902) is telescopically connected to the strip frame (901) via a telescopic assembly, and a second rotating assembly for rotating the mounting shaft (902) is arranged on the strip frame (901).

2. A soil chemical analysis sampling device according to claim 1, characterized in that: The first rotating assembly comprises a first gear (501) fixed to one end of the mounting tube (404); one side of the mounting plate (402) is connected to a first rack (502) via a connecting assembly; the first gear (501) and the first rack (502) are meshed with each other; and one side of the mounting plate (402) is provided with a pushing assembly for pushing the first rack (502).

3. A soil chemical analysis sampling device according to claim 2, characterized in that: The pushing assembly comprises a strip plate (701) arranged on one side of the mounting plate (402); the strip plate (701) and the second rotating assembly are connected for transmission via a transmission assembly; the first rack (502) is fixed to one side of the strip plate (701); a transmission plate (702) is fixed to one side of the strip plate (701); and an extrusion assembly for extruding the transmission plate (702) is arranged on the mounting plate (402).

4. A soil chemical analysis sampling device according to claim 3, characterized in that: The extrusion assembly comprises a driving disk (801) rotatably connected to one side of a mounting plate (402), a plurality of groups of protrusions (802) for pushing against a transmission plate (702) are fixed to the outer side of the driving disk (801), and a mounting motor (803) for driving the driving disk (801) is mounted on the mounting plate (402).

5. A soil chemical analysis sampling device according to claim 2, characterized in that: The connecting assembly comprises two groups of first fixing frames (601) fixed to one side of the mounting plate (402), two groups of first fixing blocks (602) are arranged between the two groups of the first fixing frames (601), the two groups of the first fixing blocks (602) are respectively fixed to the two sides of the first rack (502), a first guide rod (603) is slidably connected to the first fixing block (602), the first guide rod (603) is fixed between the two groups of the first fixing frames (601), and a first spring (604) is sleeved on the outer side of the first guide rod (603).

6. A soil chemical analysis sampling device according to claim 5, characterized in that: The telescopic assembly comprises a spline shaft (1001) rotatably connected to a strip frame (901); one end of the spline shaft (1001) is slidably connected to a spline sleeve (1002); the mounting shaft (902) is fixed to one end of the spline sleeve (1002); a retaining ring (1003) is fixed to the outer side of the spline sleeve (1002); a second spring (1004) is sleeved on the outer side of the spline sleeve (1002); and two ends of the second spring (1004) are respectively arranged to abut against the retaining ring (1003) and the strip frame (901).

7. A soil chemical analysis sampling device according to claim 6, characterized in that: The second rotating assembly comprises a second gear (1101) fixed to one end of the spline shaft (1001); the lower end of the strip frame (901) is connected to a second rack (1102) via a guide assembly; the second gear (1101) and the second rack (1102) are meshed with each other.

8. A soil chemical analysis sampling device according to claim 7, characterized in that: The guide assembly comprises two groups of second fixing frames (1201) fixed to the lower end of the strip frame (901), two groups of second fixing blocks (1202) are arranged between the two groups of the second fixing frames (1201), the two groups of the second fixing blocks (1202) are respectively fixed to the two sides of the second rack (1102), the second fixing blocks (1202) are slidably connected to the second guide rods (1203), and the second guide rods (1203) are fixed between the two groups of the second fixing frames (1201).

9. A soil chemical analysis sampling device according to claim 7, characterized in that: The transmission assembly comprises a connecting plate (1301), the second rack (1102) is fixed to one side of the connecting plate (1301), an operating plate (1302) is fixed to one end of the connecting plate (1301), an inclined groove (1303) is provided on the operating plate (1302), a transmission pin (1304) is slidably connected to the inclined groove (1303), and one end of the transmission pin (1304) is fixed to the strip plate (701).

10. A soil chemical analysis sampling device according to claim 1, characterized in that: The moving assembly comprises two groups of third fixing frames (301) fixed to the upper end of the moving seat (101), a moving plate (302) is arranged between the two groups of the third fixing frames (301), the moving plate (302) is fixed to one side of the backfill box (2), a screw rod (303) is rotatably connected between the two groups of the third fixing frames (301), the moving plate (302) is threadedly engaged with the screw rod (303), a connecting motor (304) for driving the screw rod (303) is installed on the third fixing frame (301), a round rod (305) is slidably connected to the moving plate (302), and the round rod (305) is fixed between the two groups of the third fixing frames (301).

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