A sampling device for soil chemical analysis

Abstract

The present invention discloses a sampling device for soil chemical analysis, which relates to the technical field of soil sampling. A sampling device for soil chemical analysis includes a moving seat, and a lifting table is connected to the upper end of the moving seat in a liftable manner through a lifting component. After sampling in the present invention, through the mutual cooperation of a separation component, a transmission component, a first rotation component and a second rotation component, while stirring the soil filled in excess inside the sampling cylinder after sampling, through the rotation of a rotary separation head, the soil filled inside the sampling cylinder is broken and separated and falls into the inside of a backfill box, and through the guiding action of the backfill box, it is backfilled into the sampling hole on the soil. During the whole backfill process, through the stirring and crushing actions, while ensuring the efficiency of backfilling the excess soil after sampling, it is convenient for the soil to be backfilled more smoothly.

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 for assisting in backfilling the soil after sampling. The backfill box is arranged in a funnel shape. A moving assembly for driving the backfill box to move 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 outside of the sampling cylinder, and a first rotating assembly for driving the mounting cylinder to rotate is provided on the mounting plate;

[0008] The separation component includes a strip-shaped frame fixed inside the backfill box. An installation shaft is arranged above the strip-shaped frame. One end of the installation shaft is fixed with a rotary separation head. The front end of the rotary separation head is provided with an inclined surface for abutting and squeezing against the front end of the sampling cylinder. The other end of the installation shaft is telescopically connected to the strip-shaped frame through a telescopic component. A second rotation component for driving the installation shaft to rotate is arranged on the strip-shaped frame.

[0009] Preferably, the first rotation component includes a first gear fixed at one end of the installation cylinder. One side of the installation plate is connected with a first rack through a connection component. The first gear and the first rack are meshed with each other. A pushing component for pushing the first rack is arranged on one side of the installation plate.

[0010] Preferably, the pushing component includes a strip-shaped plate arranged on one side of the installation plate. The strip-shaped plate and the second rotation component are connected and driven through a transmission component. The first rack is fixed on one side of the strip-shaped plate. A transmission plate is fixed on one side of the strip-shaped plate. An extrusion component for extruding the transmission plate is arranged on the installation plate.

[0011] Preferably, the extrusion component includes a driving disk rotatably connected to one side of the installation plate. A plurality of protrusions for abutting and pushing against the transmission plate are fixed on the outer side of the driving disk. An installation motor for driving the driving disk to rotate is installed on the installation plate.

[0012] Preferably, the connection component includes two first fixing frames fixed on one side of the installation plate. Two first fixing blocks are arranged between the two first fixing frames. The two 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 first fixing frames. A first spring is sleeved on the outer side of the first guide rod.

[0013] Preferably, the telescopic component includes a spline shaft rotatably connected to the strip-shaped frame. One end of the spline shaft is slidably connected with a spline sleeve. The installation shaft is fixed at one end of the spline sleeve. A retaining ring is fixed on the outer side of the spline sleeve. A second spring is sleeved on the outer side of the spline sleeve. The two ends of the second spring are respectively abutted against the retaining ring and the strip-shaped frame.

[0014] Preferably, the second rotation component includes a second gear fixed at one end of the spline shaft. The lower end of the strip-shaped frame is connected with a second rack through a guiding component. The second gear and the second rack are meshed with each other.

[0015] Preferably, the guiding assembly includes two groups of second fixing frames fixed to the lower end of the strip-shaped frame. Between the two groups of second fixing frames, two groups of second fixing blocks are arranged. The two groups of second fixing blocks are respectively fixed to both sides of the second rack. A second guide rod is slidably connected to the second fixing block, and the second guide rod is fixed between the two groups of second fixing frames.

[0016] Preferably, the transmission assembly includes a connecting plate. The second rack is fixed to one side of the connecting plate. One end of the connecting plate is fixed with an operating plate. An inclined slot is formed on the operating plate. A transmission pin is slidably connected to the inclined slot, and one end of the transmission pin is fixed to the strip-shaped plate.

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

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] During the process of soil chemical analysis operation, through the sampling assembly, the soil at different positions after sampling is sampled and filled inside each group of sampling cylinders through the action of multiple groups of sampling cylinders, completing the sampling operation of the soil at different positions. After sampling, through the mutual cooperation of the separation assembly, the transmission assembly, the first rotation assembly and the second rotation assembly, while stirring the soil filled in the sampling cylinder after sampling, through the rotation of the rotary separation head, the soil filled in the sampling cylinder is broken and separated and falls into the inside of the backfill box. Through the guiding action of the backfill box, it is backfilled into the sampling holes on the soil. During the whole backfilling process, through the stirring and crushing effects, while ensuring the efficiency of backfilling the redundant soil after sampling, it is convenient for the soil to be backfilled more smoothly. Brief Description of the Drawings

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

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

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

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

[0024] Figure 5Schematic structural diagram of the transmission component of the present invention;

[0025] Figure 6 Schematic structural diagram of the first rotating component, pushing component, squeezing component and connecting component of the present invention;

[0026] Figure 7 Schematic structural diagram of the telescopic component of the present invention;

[0027] Figure 8 Schematic structural diagram of the second rotating component and guiding component of the present invention;

[0028] Figure 9 Schematic diagram of the state before the rotating separation head of the present invention abuts against the sampling cylinder;

[0029] Figure 10 Schematic diagram of the transmission contraction state when the rotating separation head of the present invention abuts against the sampling cylinder;

[0030] Figure 11 Schematic diagram of the state when the rotating separation head of the present invention moves into the sampling cylinder.

[0031] In the figure: 101, moving seat; 102, lifting component; 103, lifting platform; 104, sampling cylinder; 105, slotted opening; 106, driving motor; 2, backfill box; 301, third fixing frame; 302, moving plate; 303, lead screw; 304, connecting motor; 305, round rod; 401, mounting frame; 402, mounting plate; 403, connecting rod; 404, mounting cylinder; 405, sampling tube; 406, stirring plate; 501, first gear; 502, first rack; 601, first fixing frame; 602, first fixing block; 603, first guide rod; 604, first spring; 701, strip plate; 702, transmission plate; 801, driving disc; 802, protrusion; 803, mounting motor; 901, strip bracket; 902, mounting shaft; 903, rotating separation head; 1001, spline shaft; 1002, spline sleeve; 1003, retaining ring; 1004, second spring; 1101, second gear; 1102, second rack; 1201, second fixing frame; 1202, second fixing block; 1203, second guide rod; 1301, connecting plate; 1302, operating plate; 1303, inclined slot; 1304, transmission pin. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0033] Please refer to Figures 1-11 Figure, a sampling device for soil chemical analysis, which includes a moving base 101. The upper end of the moving base 101 is connected with a lifting platform 103 in a liftable manner through a lifting assembly 102. A sampling cylinder 104 is rotatably connected to the lifting platform 103. A slotted opening 105 for assisting in material taking is formed on one side of the sampling cylinder 104. A driving motor 106 for driving the sampling cylinder 104 is installed on the lifting platform 103. It further includes:

[0034] A backfill box 2 arranged above the moving base 101 for assisting in backfilling the soil after sampling. The backfill box 2 is arranged in a funnel shape. A moving assembly for driving the backfill box 2 to move is arranged on the moving base 101. A sampling assembly for sampling and a separating assembly for assisting in separating the soil at the bottom of the sampling cylinder 104 are arranged on the backfill box 2;

[0035] The sampling assembly includes 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 fixedly connected through multiple groups of connecting rods 403. Multiple groups of mounting cylinders 404 are arranged in a vertical row on one side of the mounting plate 402. The mounting cylinders 404 are rotatably connected to the mounting plate 402. One end of the mounting cylinder 404 is detachably installed with a sampling cylinder 405 by means of bolts. Multiple groups of stirring plates 406 for stirring and separating other soil after sampling are fixed on the outer side of the sampling cylinder 405. A first rotating assembly for driving the mounting cylinder 404 to rotate is arranged on the mounting plate 402;

[0036] The separating assembly includes a strip-shaped frame 901 fixed inside the backfill box 2. An installation shaft 902 is arranged above the strip-shaped frame 901. A rotary separating head 903 is fixed to one end of the installation shaft 902. An inclined surface for abutting and extruding against the front end of the sampling cylinder 104 is formed at the front end of the rotary separating head 903. The other end of the installation shaft 902 is telescopically connected to the strip-shaped frame 901 through a telescopic assembly. A second rotating assembly for driving the installation shaft 902 to rotate is arranged on the strip-shaped frame 901;

[0037] It should be noted here that during the process of soil chemical analysis operation, through the sampling component, the soil at different positions after sampling is sampled and filled inside each group of sampling cylinders 405 through the action of multiple groups of sampling cylinders 405, completing the sampling operation of the soil at different positions. After sampling, through the mutual cooperation of the separation component, the transmission component, the first rotation component and the second rotation component, while stirring the soil filled redundantly inside the sampling cylinder 104 after sampling, through the rotation of the rotary separation head 903, the soil filled inside the sampling cylinder 104 is broken and separated and falls into the backfill box 2. Through the guiding action of the backfill box 2, it is backfilled into the sampling holes on the soil. During the whole backfill process, through the stirring and crushing actions, while ensuring the efficiency of the backfill of the redundant soil after sampling, it is convenient for the soil to be backfilled more smoothly.

[0038] Preferably, the first rotation component includes a first gear 501 fixed at one end of the mounting cylinder 404. One side of the mounting plate 402 is connected with a first rack 502 through a connecting component. The first gear 501 and the first rack 502 are meshed with each other, and a pushing component for pushing the first rack 502 is arranged on one side of the mounting plate 402;

[0039] It should be noted here that through the pushing component and the extrusion component, the transmission plate 702 and the strip plate 701 make reciprocating up and down movements as the driving disk 801 rotates. During the reciprocating movement of the strip plate 701, through the meshing transmission between the first rack 502 and the first gear 501, each group of mounting cylinders 404 and the sampling cylinders 405 on the mounting cylinders 404 are driven to make reciprocating movements.

[0040] Preferably, the pushing component includes a strip plate 701 arranged on one side of the mounting plate 402. The strip plate 701 and the second rotation component are connected and transmitted through the transmission component. The first rack 502 is fixed on one side of the strip plate 701. A transmission plate 702 is fixed on one side of the strip plate 701. An extrusion component for extruding the transmission plate 702 is arranged on the mounting plate 402; The extrusion component includes a driving disk 801 rotatably connected to one side of the mounting plate 402. Multiple groups of protrusions 802 for pushing against the transmission plate 702 are fixed on the outer side of the driving disk 801. An installation motor 803 for driving the driving disk 801 to rotate is installed on the mounting plate 402;

[0041] It should be noted here that through the installation motor 803, the driving disk 801 is rotated. During the rotation of the driving disk 801, through the pushing action of each group of protrusions 802 against the transmission plate 702 in turn and the reset action of the connecting component on the transmission plate 702 after being stressed, the transmission plate 702 and the strip plate 701 make reciprocating up and down movements as the driving disk 801 rotates.

[0042] Preferably, the connecting component includes two groups of first fixing frames 601 fixed to one side of the mounting plate 402. There are two groups of first fixing blocks 602 arranged between the two groups of first fixing frames 601. The two groups of first fixing blocks 602 are respectively fixed to both 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. A first spring 604 is sleeved on the outer side of the first guide rod 603;

[0043] It should be noted here that: through the first fixing block 602 and the first guide rod 603 between the two groups of first fixing frames 601, it is convenient to assist the sliding guidance of the first rack 502 after being stressed. Through the first spring 604, it is convenient to assist the reset movement of the first rack 502 after movement. During the guiding movement of the first rack 502, the driving plate 702 and the strip plate 701 are driven to move up and down synchronously.

[0044] Preferably, the telescopic component includes a spline shaft 1001 rotatably connected to the strip-shaped frame 901. One end of the spline shaft 1001 is slidably connected with 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. The two ends of the second spring 1004 are respectively abutted against the retaining ring 1003 and the strip-shaped frame 901;

[0045] It should be noted here that: through the spline shaft 1001 and the spline sleeve 1002, it is convenient to assist the telescopic connection between the mounting shaft 902 and the strip-shaped frame 901. Through the retaining ring 1003 and the second spring 1004, it is convenient to assist the reset movement of the mounting shaft 902 after contraction movement. And through the spline shaft 1001 and the spline sleeve 1002, the mounting shaft 902 can be rotated while maintaining the telescopic movement.

[0046] Preferably, the second rotating component includes a second gear 1101 fixed to one end of the spline shaft 1001. The lower end of the strip-shaped frame 901 is connected with a second rack 1102 through a guiding component. The second gear 1101 and the second rack 1102 are meshed with each other;

[0047] It should be noted here that: during the up and down reciprocating movement of the strip plate 701, through the transmission component, the connecting plate 1301 and the second rack 1102 at one end of the connecting plate 1301 are driven to perform reciprocating movement. During the reciprocating movement of the second rack 1102, through the meshing transmission between the second rack 1102 and the second gear 1101, the spline shaft 1001 is driven to rotate. During the rotation of the spline shaft 1001, through the connection and transmission effect of the spline shaft 1001 and the spline sleeve 1002, the mounting shaft 902 and the rotary separation head 903 are driven to perform reciprocating movement synchronously.

[0048] Preferably, the guiding assembly includes two groups of second fixing frames 1201 fixed to the lower end of the strip-shaped frame 901. Between the two groups of second fixing frames 1201, there are two groups of second fixing blocks 1202. The two groups of second fixing blocks 1202 are respectively fixed to both sides of the second rack 1102. A second guide rod 1203 is slidably connected to the second fixing block 1202. The second guide rod 1203 is fixed between the two groups of second fixing frames 1201;

[0049] It should be noted here that: through the second fixing block 1202 and the second guide rod 1203 between the two groups of second fixing frames 1201, it is convenient to assist the sliding guidance of the second rack 1102 after being stressed.

[0050] Preferably, the transmission assembly includes a connecting plate 1301. The second rack 1102 is fixed to one side of the connecting plate 1301. One end of the connecting plate 1301 is fixed with an operation plate 1302. An inclined slot 1303 is opened on the operation plate 1302. A transmission pin 1304 is slidably connected to the inclined slot 1303. One end of the transmission pin 1304 is fixed to the strip-shaped plate 701;

[0051] It should be noted here that: during the reciprocating movement of the strip-shaped plate 701 up and down, through the interaction between the transmission pin 1304 and the inclined slot 1303 on the operation plate 1302, the connecting plate 1301 and the second rack 1102 at one end of the connecting plate 1301 are driven to perform reciprocating movement.

[0052] Preferably, the moving assembly includes two groups of third fixing frames 301 fixed to the upper end of the moving seat 101. Between the two groups of third fixing frames 301, there is a moving plate 302. The moving plate 302 is fixed to one side of the backfill box 2. A lead screw 303 is rotatably connected between the two groups of third fixing frames 301. The moving plate 302 is threadedly engaged with the lead screw 303. A connecting motor 304 for driving the lead screw 303 is installed on the third fixing frame 301. A round rod 305 is slidably connected to the moving plate 302. The round rod 305 is fixed between the two groups of third fixing frames 301;

[0053] It should be noted here that: through the connecting motor 304, the lead screw 303 is driven to rotate. During the rotation of the lead screw 303, through the meshing transmission between the lead screw 303 and the moving plate 302 and the sliding guiding action of the round rod 305, the stressed moving plate 302 and the backfill box 2 are moved.

[0054] In this solution: A sampling device for soil chemical analysis includes the following steps:

[0055] During the process of soil chemical analysis operation, a sampling device is used to sample the soil. During the operation, the entire device is moved to a specified position by the movement of the moving seat 101. After the movement is completed, the lifting assembly 102 drives the lifting platform 103 and the sampling cylinder 104 to move downward. During the downward movement, the driving motor 106 drives the sampling cylinder 104 to rotate. Through the downward movement and rotation of the sampling cylinder 104, the sampling cylinder 104 is screwed into the soil at the specified position. After the sampling cylinder 104 is screwed into the soil to a certain depth, the lifting assembly 102 drives the lifting platform 103 and the sampling cylinder 104 to rise to a certain height. At this time, the sampling cylinder 104 is filled with soil, and the soil sampling operation is completed;

[0056] After the soil sampling is completed, through the moving assembly, the backfill box 2 is driven to move above the moving seat 101, so that the backfill box 2 moves to be below the sampling cylinder 104. During the movement of the backfill box 2, through the connection of the mounting frame 401, the mounting plate 402 and multiple groups of connecting rods 403, each group of mounting cylinders 404 and the sampling cylinders 405 at the front ends of the mounting cylinders 404 are driven to move synchronously. During the movement, the front ends of the sampling cylinders 405 pass through the slots 105 and are inserted into the soil filled on the sampling cylinder 104. The soil at different positions after sampling is sampled and filled inside each group of sampling cylinders 405 through the action of multiple groups of sampling cylinders 405, and the sampling operation of the soil at different positions is completed;

[0057] During the movement of the backfill box 2, through the connection of the strip-shaped frame 901 and the telescopic assembly, the mounting shaft 902 and the rotary separation head 903 are driven to move synchronously. See Figure 9 During the movement of the rotary separation head 903, the inclined surface of the rotary separation head 903 first abuts against the front end of the sampling cylinder 104, and the rotary separation head 903 is pushed to move closer to the strip-shaped frame 901 and contract. See Figure 10 As the rotary separation head 903 continues to move, through the elastic extrusion of the second spring 1004 on the telescopic assembly, the front end of the rotary separation head 903 abuts against the bottom of the soil filled inside the sampling cylinder 104. See Figure 11, after the sampling cylinders 405 in each group are 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, through the pushing action of the protrusions 802 in each group against the transmission plate 702 in sequence and the resetting action of the connecting component on the transmission plate 702 after being stressed, the transmission plate 702 and the strip plate 701 move up and down reciprocally along with the rotation of the driving disk 801. During the reciprocating movement of the strip plate 701, through the meshing transmission between the first rack 502 and the first gear 501, each mounting cylinder 404 and the sampling cylinder 405 on the mounting cylinder 404 are driven to move reciprocally. At this time, since the sampling cylinder 405 is in the state of being inserted into the sampling cylinder 104 to fill the soil, through the rotation of the sampling cylinder 405, each stirring plate 406 is driven to stir the redundant filled soil inside the sampling cylinder 104 after sampling, assisting the separation and falling operation of the multiple groups of soil inside the sampling cylinder 104 from the sampling cylinder 104. And during the reciprocating movement of the strip plate 701 up and down, through the interaction between the transmission pin 1304 and the inclined groove 1303 on the operation plate 1302, the connecting plate 1301 and the second rack 1102 at one end of the connecting plate 1301 are driven to move reciprocally. During the reciprocating movement of the second rack 1102, through the meshing transmission between the second rack 1102 and the second gear 1101, the spline shaft 1001 is driven to rotate. During the rotation of the spline shaft 1001, through the connection and transmission action between the spline shaft 1001 and the spline sleeve 1002, the mounting shaft 902 and the rotary separating head 903 are driven to move reciprocally synchronously. Since the rotary separating head 903 is kept in contact with the lowermost part of the filled soil inside the sampling cylinder 104 under the elastic force of the second spring 1004 on the telescopic component, through the rotation of the rotary separating head 903, the filled soil inside the sampling cylinder 104 is broken and separated and falls into the backfill box 2. Through the guiding action of the backfill box 2, it is backfilled into the sampling holes on the soil, avoiding problems such as uneven foundation after soil sampling.

[0058] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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), wherein the upper end of the movable seat (101) is liftably connected to a lifting platform (103) via a lifting assembly (102), a sampling barrel (104) is rotatably connected to the lifting platform (103), a slot (105) for assisting in taking out materials is provided on one side of the sampling barrel (104), and a driving motor (106) for driving the sampling barrel (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 for assisting in backfilling soil after sampling. The backfill box (2) is arranged in a funnel shape. A moving component for driving the backfill box (2) to move is arranged on the moving seat (101). A sampling component for sampling and a separation component for assisting in separating 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 provided 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 driving the mounting cylinder (404) to rotate is provided on the mounting plate (402); The separation component 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 against and squeezing 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 component, and a second rotating component for driving the mounting shaft (902) to rotate is arranged on the strip frame (901); 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).

2. A soil chemical analysis sampling device according to claim 1, 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).

3. A soil chemical analysis sampling device according to claim 2, 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) to rotate is mounted on the mounting plate (402).

4. A soil chemical analysis sampling device according to claim 3, characterized in that: The connection 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 first fixing frames (601); the two groups of first fixing blocks (602) are respectively fixed to 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).

5. A soil chemical analysis sampling device according to claim 4, 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 disposed to abut against the retaining ring (1003) and the strip frame (901).

6. A soil chemical analysis sampling device according to claim 5, 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.

7. A soil chemical analysis sampling device according to claim 6, 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 second fixing frames (1201), the two groups of second fixing blocks (1202) are respectively fixed to two sides of the second rack (1102), the second fixing blocks (1202) are slidably connected to second guide rods (1203), and the second guide rods (1203) are fixed between the two groups of second fixing frames (1201).

8. 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) being fixed to one side of the connecting plate (1301), an operating plate (1302) being fixed to one end of the connecting plate (1301), an inclined groove (1303) being provided on the operating plate (1302), a transmission pin (1304) being slidably connected to the inclined groove (1303), and one end of the transmission pin (1304) being fixed to the strip plate (701).

9. 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 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 the third fixing frames (301).

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