Soil parallel sample collection method and apparatus

Abstract

The application relates to a soil parallel sample collection method and device, which comprises a machine shell, the bottom surface of the machine shell is provided with a plurality of mounting seats for mounting a plurality of collection tubes; each of the mounting seats comprises a top plate and two side plates connected to the bottom surface of the top plate, the two side plates are mirror images distributed around the axis of the top plate, two limiting grooves with the same horizontal height are arranged on the opposite sides of the two side plates respectively, one end of the two limiting grooves penetrates through one side of the two side plates respectively and forms a notch, and a limiting block connected to the outer wall of the collection tube is slidingly matched in the two limiting grooves. By arranging the plurality of mounting seats, a plurality of collection tubes can be simultaneously mounted, a plurality of soil samples can be collected in one drilling operation, parallel samples can be obtained without multiple drilling, and the plurality of collection tubes are synchronously drilled into the soil under the driving of the same device at the same time, so that the collection tubes can reach the same target depth and the same perpendicularity, and the inconsistent depth and perpendicularity caused by multiple drilling can be avoided.

Description

Technical Field

[0001] This invention relates to the field of soil sampling technology, specifically to a method and apparatus for collecting parallel soil samples. Background Technology

[0002] The detection of volatile organic compounds (VOCs) is a key indicator for assessing the degree of soil pollution. According to Article 7.3.3.1 of the "Technical Specification for Soil Environmental Monitoring" (HJ 166-2026), when collecting single-point samples, soil samples should be taken in an equal amount, as vertically as possible, avoiding oblique cuts, to ensure that the obtained samples better reflect the soil conditions of the vertical profile at that location. Furthermore, Article 7.5, regarding sampling quality assurance and quality control, clearly stipulates that parallel samples for VOC testing should be collected from nearby locations whenever possible.

[0003] In deep soil surveys, drilling equipment is typically used to drill to a depth of 6m or more to obtain intact undisturbed soil cores. Based on the stratification of the undisturbed soil cores, single-point or parallel sampling is then performed.

[0004] However, in practice, deep soil samples typically have complex physicochemical properties (such as high water content and dense texture), making it inconvenient to use the conventional "quartering method" for sample processing. If existing single-tube sampling structures (such as...) are used... Figure 10 As shown in the diagram, only one soil sample can be collected at a time. To collect parallel samples that meet the standards, multiple drilling operations must be performed manually in the same sampling area. This not only increases on-site operation time but also makes it difficult to guarantee the verticality and depth of multiple drilling samplings. It is easy for oblique cuts or deviations from the original sampling point to occur, resulting in parallel samples not originating from the same soil layer at the same depth and location as the actual original sample, thus affecting the comparability and validity of VOCs parallel sample test results. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method and apparatus for collecting parallel soil samples, so as to solve the problem that when using the existing single-tube sampling structure, in order to collect parallel samples that meet the standards, it is necessary to rely on manual operation to repeatedly drill down into the same sampling area, which only increases the on-site operation time and makes it difficult to guarantee the verticality and depth of multiple drilling sampling.

[0006] This invention is achieved through the following technical solution: A method for collecting parallel soil samples includes the following steps: S1: Determine a sampling point in the area to be detected; S2: Define the pre-defined area around the sampling point as the parallel sample collection area; S3: Move multiple collection tubes to the parallel sample collection area and position them to form multiple collection stations; S4: Insert multiple collection tubes vertically into the soil simultaneously and gradually deeper, so that the soil enters the inner cavity of the collection tube through the opening on the bottom of the collection tube to form a soil sample. S5: Insert multiple collection tubes downwards to a preset distance, then pull them out simultaneously upwards. Select the sample in one of the collection tubes as the original sample, and the samples in the remaining collection tubes as parallel samples.

[0007] Furthermore, in S2, the area with a radius of no more than 0.25m centered on the sampling point is defined as the parallel sample collection area.

[0008] An apparatus for using the above-mentioned parallel soil sampling method includes a housing, the bottom surface of which is provided with multiple mounting seats for mounting multiple sampling tubes. Each of the mounting bases includes a top plate and two side plates connected to its bottom surface. The two side plates are mirror images of the top plate, and the distance between the opposite sides of the two side plates is not less than the diameter of the collection tube. Each side plate is provided with two limiting grooves of the same horizontal height. One end of each limiting groove passes through one side of the two side plates and forms a slot. Each limiting groove is slidably fitted with a limiting block connected to the outer wall of the collection tube. The limiting block can axially fix the collection tube or release the collection tube by sliding into or out of the limiting groove.

[0009] Furthermore, the housing has a hollow interior forming an inner cavity, in which a drive gear and a plurality of driven gears that cooperate with a plurality of mounting seats are rotatably connected. The drive gear and the plurality of driven gears are drivenly connected. A rotating rod is coaxially connected to the driven gear. The end of the rotating rod away from the driven gear passes through the inner cavity and is coaxially connected to the top plate. A motor with an output shaft that is drivenly connected to the drive gear is provided on the housing.

[0010] Furthermore, the two slots are located on the left and right sides of the two side plates, respectively, and the collection tube can be rotated to allow the two limiting blocks to slide into or out of the limiting slots through the two slots.

[0011] Furthermore, multiple driven gears are arranged in a ring around the driving gear and all mesh with the driving gear. The bottom surface of the housing is provided with a positioning rod for inserting into the soil, and the positioning rod is coaxial with the driving gear.

[0012] Furthermore, the bottom surface of the drive gear is connected to the top surface of the positioning rod.

[0013] Furthermore, the top and bottom surfaces of the housing are provided with adjustment grooves that communicate with the inner cavity. The adjustment grooves extend in an arc around the drive gear as the axis. A connecting rod is slidably fitted inside the adjustment grooves. A support plate located on the top surface of the connecting rod is provided on the top surface of the housing. Two mounting bases and two driven gears are provided, and the connecting rod is coaxially connected to one of the driven gears and the top plate of one of the mounting bases.

[0014] Furthermore, the top surface of the support plate has a through hole that penetrates its bottom surface, the top surface of the housing has a screw hole with internal threads, and it also includes a bolt with external threads. The threaded end of the bolt can pass through the through hole and connect with the screw hole to fix the support plate.

[0015] Furthermore, multiple screw holes are distributed along the extension direction of the adjustment groove, the connecting rod is rotatably connected to the support plate, and the support plate can rotate to align the through hole with the screw hole, and the multiple screw holes are all located on the sliding trajectory of the through hole.

[0016] The beneficial effects of this invention are as follows: This method and apparatus for collecting parallel soil samples allows for the simultaneous installation of multiple collection tubes by setting up multiple mounting bases. Multiple soil samples can be collected in a single drilling operation, eliminating the need for multiple drilling operations to obtain parallel samples. Furthermore, multiple collection tubes are synchronously drilled into the soil at the same time and driven by the same device, ensuring that each collection tube reaches the same target depth and the same verticality, thus reducing the likelihood of inconsistencies in depth and verticality caused by multiple drilling operations.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] Figure 1 This is a flowchart of the soil parallel sample collection method of the present invention; Figure 2 This is a schematic diagram of the overall structure of the soil parallel sample collection device of the present invention (first perspective). Figure 3 This is a schematic diagram of the overall structure of the soil parallel sample collection device of the present invention (second perspective). Figure 4 This is a schematic diagram of the structure of the drive gear meshing with two driven gears inside the housing of the present invention. Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is a schematic diagram of the present invention, showing the acquisition tube located between two side plates and the limiting block not sliding into the limiting groove. Figure 7 This is a schematic diagram of the structure of the present invention after the collection tube is located between the two side plates and the limiting block slides into the limiting groove; Figure 8 This is a schematic diagram of the structure of the limiting block and the limiting groove of the present invention when they are engaged. Figure 9 This is an application model diagram of the soil parallel sample collection device of the present invention; Figure 10 This is a single-tube sampling structure in the existing technology.

[0019] In the picture: 1. Data collection tube; 2. Housing; 3. Mounting base; 301. Top plate; 302. Side plate; 4. Limiting groove; 5. Limiting block; 6. Driving gear; 7. Driven gear; 8. Rotating rod; 9. Motor; 10. Positioning rod; 11. Adjusting groove; 12. Connecting rod; 13. Support plate; 14. Through hole; 15. Screw hole; 16. Bolt. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0025] Please see Figure 1-9 The present invention provides a technical solution: a method for collecting parallel soil samples, comprising the following steps: S1: Determine a sampling point in the area to be detected; S2: Define the pre-defined area around the sampling point as the parallel sample collection area; S3: Move multiple collection tubes 1 to the parallel sample collection area and position them to form multiple collection stations; S4: Insert multiple collection tubes 1 vertically into the soil simultaneously and gradually deeper, so that the soil enters the inner cavity of the collection tube 1 through the opening on the bottom surface to form a soil sample. S5: Insert multiple collection tubes 1 downwards at a preset distance, then pull them out simultaneously upwards. Select the sample in one of the collection tubes as the original sample, and the samples in the remaining collection tubes as parallel samples.

[0026] Among them, the structure of the acquisition tube 1 is as follows Figure 5 As shown, it includes a pipe body and a sliding rod that slides with it, which can push the soil out of the pipe body.

[0027] Furthermore, the sampling tube 1 is a disposable consumable, and a single sampling tube can collect approximately 5g of soil, which is sufficient to meet the sample requirements of the standard detection method. The outer diameter of the opening of sampling tube 1 matches the opening size of a standard VOCs sampling bottle (such as a brown sample bottle with an inner diameter of approximately 17mm). Operators can directly insert the end of the sampling tube into the bottle opening, use the sliding rod to push the soil sample directly into the bottle, and immediately screw on the cap to seal it. This avoids the intermediate transfer steps required in traditional operations, such as using tweezers to pick up the sample and pouring it into the sampling bottle, thus reducing the volatilization loss of VOCs during the transfer process.

[0028] In this method, multiple sampling tubes 1 are simultaneously and vertically inserted into the soil, gradually deepening them so that soil enters the inner cavity of each sampling tube 1 through openings at the bottom. Because each sampling tube 1 is inserted downwards simultaneously at a consistent speed and depth, the soil within each tube originates from the same soil layer, thus fulfilling the conditions for parallel sample collection. Furthermore, since multiple sampling tubes 1 are inserted and withdrawn simultaneously, multiple soil samples can be obtained after a single drilling operation. One sample is selected as the original sample, and the rest are used as parallel samples. This eliminates the need for multiple drilling operations, solving the problem of inconsistent drilling depth in each operation.

[0029] In this embodiment, in step S2, the area with a radius of no more than 0.25m centered on the sampling point is defined as the parallel sample collection area.

[0030] In this scheme, the parallel sample collection area is specifically defined as a radius of 0.5m around the collection point. Within this range, the physical and chemical properties of the soil (such as texture, moisture content, and pollutant distribution) have high spatial consistency, and the soil samples obtained by each collection tube 1 within this area are relatively close in spatial location, making them more representative of the soil conditions of the same sampling area.

[0031] An apparatus for using the above-mentioned parallel soil sampling method includes a housing 2, and the bottom surface of the housing 2 is provided with multiple mounting seats 3 for mounting multiple sampling tubes 1. Each of the mounting bases 3 includes a top plate 301 and two side plates 302 connected to its bottom surface. The two side plates 302 are mirror images of the top plate 301. The distance between the opposite sides of the two side plates 302 is not less than the diameter of the collection tube 1 (the distance is equal to the diameter of the collection tube plus a clearance of 0.1-0.5 mm). Each side plate 302 is provided with two limiting grooves 4 at the same horizontal height. One end of each limiting groove 4 passes through one side of the two side plates 302 and forms a slot. Each limiting groove 4 has a limiting block 5 that is slidably fitted inside it and connected to the outer wall of the collection tube 1. The limiting block 5 can be fixed to the collection tube 1 by adhesive bonding or integral molding. The limiting block 5 can axially fix the collection tube 1 or release the collection tube 1 by sliding into or out of the limiting groove 4.

[0032] The height of the slot and the limiting groove 4 is slightly greater than the height of the limiting block 5. When the limiting block 5 slides into the limiting groove 4, the friction between the limiting block 5 and the limiting groove 4 makes it less likely that the limiting block 5 will accidentally detach from the limiting groove 4.

[0033] In this design, each mounting base 3 consists of a top plate 301 and two side plates 302. The two side plates 302 are mirror images of the top plate 301, and the distance between their opposite sides is not less than the diameter of the collection tube 1, so that the collection tube 1 can be inserted between the two side plates 302. During installation, the collection tube 1 is placed between the two side plates 302, and the limiting block 5 is aligned with the slot (as shown). Figure 6 As shown, the sampling tube 1 is slid into the limiting groove 4 to fix it on the mounting base 3 and constrain its axial direction so that it cannot move axially due to the reaction force during the insertion into the soil. When it is necessary to disassemble, the limiting block 5 can be slid out of the limiting groove 4 through the groove to release the fixation and make it easier to take out the soil in the sampling tube 1.

[0034] In use, multiple collection tubes 1 are respectively matched with multiple mounting bases 3, so that multiple collection tubes 1 are fixed under the housing 2. In this state, the operator can hold the handles on both sides of the housing 2 and press the housing 2 downward to make multiple collection tubes 1 drill into the soil simultaneously. Then, pull the housing 2 upward to make multiple collection tubes 1 detach from the soil simultaneously. Then push the slide bar on the collection tube 1 to output the soil inside to the brown sample bottle for preservation, thereby obtaining a soil sample.

[0035] Compared with the prior art, the present invention sets up multiple mounting bases 3, which can simultaneously install multiple collection tubes 1, and collect multiple soil samples in one drilling operation. It does not require multiple drilling to obtain parallel samples. Moreover, multiple collection tubes 1 are driven into the soil at the same time and by the same device, ensuring that each collection tube 1 reaches the same target depth, and it is not easy for inconsistencies in depth and verticality caused by multiple drilling to occur.

[0036] During production and processing, multiple limiting grooves 4 can be opened along the height direction of the side plate 302 so that the collection tube 1 can be fixed in conjunction with the limiting grooves 4 of different heights according to the usage requirements.

[0037] Specifically, when the collection tube 1 is paired with a lower-height limiting groove 4, the distance between the top surface of the sliding rod inside and the bottom surface of the top plate 301 is greater. That is, the sliding rod can slide upward a greater distance, and therefore, more soil can enter the collection tube 1. Conversely, when the collection tube 1 is paired with a higher-height limiting groove 4, less soil can enter the collection tube 1. This can be adjusted by the operator as needed.

[0038] The sampling tube 1 can be equipped with partitions to divide its inner cavity into multiple independent spaces. For example, two mutually perpendicular partitions can be installed inside the sampling tube 1 to divide its internal space into four equally sized, independently sealed fan-shaped grids. The four grids are symmetrically distributed around the central axis of the sampling tube 1, and the volume of each grid is the same to ensure uniform material storage. This allows multiple soil samples to be formed inside the sampling tube 1 when it is inserted into the soil, thus achieving the effect of sample separation.

[0039] In this embodiment, the housing 2 has a hollow interior forming an inner cavity. A drive gear 6 and a plurality of driven gears 7 that cooperate with a plurality of mounting seats 3 are rotatably connected in the inner cavity. The drive gear 6 and the plurality of driven gears 7 are connected in a transmission connection. A rotating rod 8 is coaxially connected to the driven gears 7. The end of the rotating rod 8 away from the driven gears 7 passes through the inner cavity and is coaxially connected to the top plate 301. A motor 9 with an output shaft that is connected in a transmission connection with the drive gear 6 is provided on the housing 2. The motor 9 is detachably connected to the top surface of the housing 2.

[0040] In this design, a drive gear 6 and multiple driven gears 7 are rotatably connected within the inner cavity of the housing 2. The drive gear 6 is connected to each driven gear 7 in a transmission manner. Since all driven gears 7 are meshed with the drive gear 6, when the motor 9 drives the drive gear 6 to rotate, the meshing action drives the multiple driven gears 7 to rotate synchronously. Because each driven gear 7 is coaxially connected to the top plate 301 of the mounting base 3 via a rotating rod 8, the rotation of the driven gear 7 will drive the mounting base 3 and the collection tube 1 fixed on the mounting base 3 to rotate synchronously, so that the collection tube 1 can be inserted into the soil. Compared with relying entirely on manual downward pressing to insert the collection tube 1 into the soil, the method of rotating the collection tube 1 into the soil can reduce the physical exertion of the operator.

[0041] For ease of understanding, the driving gear 6 in this invention is designed to rotate clockwise, while the driven gear 7 meshing with it rotates counterclockwise.

[0042] In this embodiment, the two slots are located on the left and right sides of the two side plates 302, respectively (e.g., Figure 8 As shown), the collecting tube 1 can be rotated to allow the two limiting blocks 5 to slide into or out of the limiting groove 4 through the two slots respectively.

[0043] In this scheme, when the collection tube 1 moves to the same horizontal height as the two limit blocks 5 and the two limit grooves 4, the collection tube 1 can be rotated to slide into or out of the limit groove 4.

[0044] When installing the collection tube 1, first, adjust the collection tube 1 so that the two limiting blocks 5 on both sides are located on both sides of the limiting groove 4. At this time, the limiting blocks 5 and the limiting groove 4 are vertically staggered, allowing the collection tube 1 to freely move up and down to enter or leave between the two side plates 302. Then, adjust the height of the collection tube 1 so that the two limiting blocks 5 and the limiting groove 4 are horizontally aligned (e.g., Figure 6 (As shown), and then by rotating clockwise, the limiting block 5 is slid into the limiting groove 4 until the limiting block 5 abuts against the side wall of the limiting groove 4 (as shown). Figure 7 and 8 (As shown).

[0045] When disassembling the collection tube 1, rotate the collection tube 1 counterclockwise so that it rotates relative to the limiting groove 4, thereby causing the limiting block 5 to slide out of the limiting groove 4.

[0046] When the sampling tube 1 is in the installation state, as the driven gear 7 drives the mounting base 3 to rotate synchronously in the same direction, the side plate 302 and the limiting groove 4 rotate counterclockwise around the axis of the top plate 301. The inner wall of the limiting groove 4 pushes the limiting block 5, thereby driving the sampling tube to rotate. Since the limiting groove 4 is also in the rotating state, its relative state with the limiting block 5 is stationary. Therefore, the limiting block 5 is not easy to disengage from the limiting groove 4, but is easily pushed by the limiting groove 4 to assist the sampling tube in rotating.

[0047] In this embodiment, a plurality of driven gears 7 are arranged in a ring around the driving gear 6 and all mesh with the driving gear 6. The bottom surface of the housing 2 is provided with a positioning rod 10 for inserting into the soil, and the positioning rod 10 is coaxial with the driving gear 6.

[0048] In this scheme, multiple driven gears 7 are evenly distributed in a ring, and the included angle between the shafts of two adjacent driven gears is (360 / n)°, where n is the number of driven gears; The driving gear 6 is located at the center, with multiple driven gears 7 evenly distributed around it, forming a planetary gear transmission structure. The positioning rod 10 is coaxially mounted with the driving gear 6. During sampling, the positioning rod 10 is first inserted into the soil to provide a positioning reference for the entire device.

[0049] In this embodiment, the bottom surface of the drive gear 6 is connected to the top surface of the positioning rod 10. The positioning rod 10 is rotatably connected to the housing via a bearing, and the housing 2 has a through hole for the end of the positioning rod 10 to pass through the housing 2 and connect with the drive gear 6.

[0050] In this design, the rotation of the drive gear 6 can drive the positioning rod 10 to rotate synchronously, so that the positioning rod 10 can be inserted into the soil by rotary drilling. This helps the positioning rod 10 to be inserted into the soil better and reduces the physical effort required by the operator to insert the positioning rod 10.

[0051] In this embodiment, the top and bottom surfaces of the housing 2 are provided with adjustment grooves 11 that communicate with the inner cavity. The adjustment grooves 11 extend in an arc around the drive gear 6. A connecting rod 12 is slidably fitted inside the adjustment grooves 11. A support plate 13 located on the top surface of the housing 2 is provided on the top surface of the connecting rod 12. There are two of each of the mounting base 3 and driven gear 7. The connecting rod 12 is coaxially connected to one of the driven gear 7 and the top plate 301 of one of the mounting bases 3.

[0052] In this scheme, the support plate 13, the connecting rod 12 and the top plate 301 are connected to form a limiting structure. The limiting structure forms an axial constraint by the bottom surface of the support plate 13 abutting against the top surface of the housing 2 and the top surface of the top plate 301 abutting against the bottom surface of the housing 2. The radial direction of the connecting rod 12 is adapted to the adjusting groove 11 to form a radial constraint, so that the movement of the driven gear 7 connected to the connecting rod 12 is limited to the extension direction along the adjusting groove 11.

[0053] In use, the operator can move the support plate 13 to make the connecting rod 12, one of the driven gears 7, one of the mounting bases 3 and one of the sampling tubes 1 slide. The distance between the two sampling tubes 1 can be adjusted by sliding to adapt to different sampling needs.

[0054] In this embodiment, the top surface of the support plate 13 is provided with a through hole 14 that penetrates its bottom surface, the top surface of the housing 2 is provided with a screw hole 15 with internal threads, and also includes a bolt 16 with external threads. The threaded end of the bolt 16 can pass through the through hole 14 and connect with the screw hole 15 to fix the support plate 13.

[0055] In this scheme, after the support plate 13 slides to a specific position along the extension direction of the adjustment groove 11, the through hole 14 and the screw hole 15 are aligned vertically. At this time, the threaded end of the bolt 16 passes through the through hole 14 and is threadedly connected to the screw hole 15 to fix the support plate 13 in this position, so as to fix the distance between the two collection tubes.

[0056] In this embodiment, multiple screw holes 15 are distributed along the extension direction of the adjustment groove 11. The connecting rod 12 is rotatably connected to the support plate 13. The support plate 13 can rotate to align the through hole 14 with the screw hole 15. All screw holes 15 are located on the sliding trajectory of the through hole 14.

[0057] In this design, multiple locking positions (screw holes 15) are provided along the arc path of the adjustment groove 11, each screw hole 15 corresponding to a specific sampling interval level. During adjustment, first slide the support plate 13 to the specific position, then rotate the support plate 13 to align the through hole 14 with the screw hole 15 corresponding to the specific position, and then screw in the bolt 16 to complete the locking.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for collecting parallel soil samples, characterized in that: Includes the following steps: S1: Determine a sampling point in the area to be detected; S2: Define the pre-defined area around the sampling point as the parallel sample collection area; S3: Move multiple collection tubes (1) to the parallel sample collection area and position them to form multiple collection stations; S4: Insert multiple collection tubes (1) vertically into the soil simultaneously and gradually deeper, so that the soil enters the inner cavity of the collection tube (1) through the opening on the bottom surface to form a soil sample. S5: Insert multiple collection tubes (1) downwards at a preset distance, then pull them out upwards simultaneously. Select the sample in one of the collection tubes (1) as the original sample, and the samples in the other collection tubes (1) as parallel samples.

2. The method for collecting parallel soil samples according to claim 1, characterized in that: In S2, the area with a radius of no more than 0.25m centered on the sampling point is defined as the parallel sample collection area.

3. An apparatus for using the soil parallel sample collection method according to claim 1, characterized in that: Includes a housing (2), the bottom surface of which is provided with multiple mounting bases (3) for mounting multiple acquisition tubes (1); Each of the mounting bases (3) includes a top plate (301) and two side plates (302) connected to its bottom surface. The two side plates (302) are mirror images of the top plate (301) with respect to their axis. The distance between the opposite sides of the two side plates (302) is not less than the diameter of the collection tube (1). Each side plate (302) is provided with two limiting grooves (4) of the same horizontal height. One end of each limiting groove (4) passes through one side of the two side plates (302) and forms a slot. Each limiting groove (4) is slidably fitted with a limiting block (5) connected to the outer wall of the collection tube (1). The limiting block (5) can axially fix the collection tube (1) or release the collection tube (1) by sliding into or out of the limiting groove (4).

4. The soil parallel sample collection device according to claim 3, characterized in that: The housing (2) is hollow inside to form an inner cavity. A drive gear (6) and a plurality of driven gears (7) that cooperate with a plurality of mounting seats (3) are rotatably connected in the inner cavity. The drive gear (6) is connected to the plurality of driven gears (7) in a transmission connection. A rotating rod (8) is coaxially connected to the driven gears (7). The end of the rotating rod (8) away from the driven gears (7) passes through the inner cavity and is coaxially connected to the top plate (301). A motor (9) with an output shaft that is connected to the drive gear (6) is provided on the housing (2).

5. The soil parallel sample collection device according to claim 3, characterized in that: The two slots are located on the left and right sides of the two side plates (302), respectively. The collection tube (1) can be rotated to allow the two limiting blocks (5) to slide into or out of the limiting slots (4) through the two slots.

6. The soil parallel sample collection device according to claim 4, characterized in that: Multiple driven gears (7) are arranged in a ring around the driving gear (6) and all mesh with the driving gear (6). The bottom surface of the housing (2) is provided with a positioning rod (10) for inserting into the soil. The positioning rod (10) is coaxial with the driving gear (6).

7. The soil parallel sample collection device according to claim 6, characterized in that: The bottom surface of the drive gear (6) is connected to the top surface of the positioning rod (10).

8. The soil parallel sample collection device according to claim 3, characterized in that: The top and bottom surfaces of the housing (2) are provided with adjustment grooves (11) that communicate with the inner cavity. The adjustment grooves (11) extend in an arc with the drive gear (6) as the axis. A connecting rod (12) is slidably fitted inside the adjustment grooves (11). A support plate (13) located on the top surface of the connecting rod (12) is provided on the top surface of the housing (2). Two mounting bases (3) and two driven gears (7) are provided. The connecting rod (12) is coaxially connected to one of the driven gears (7) and the top plate (301) of one of the mounting bases (3).

9. The soil parallel sample collection device according to claim 8, characterized in that: The top surface of the support plate (13) is provided with a through hole (14) that penetrates its bottom surface. The top surface of the housing (2) is provided with a screw hole (15) with internal threads. It also includes a bolt (16) with external threads. The threaded end of the bolt (16) can pass through the through hole (14) and connect with the screw hole (15) to fix the support plate (13).

10. The soil parallel sample collection device according to claim 9, characterized in that: The screw holes (15) are distributed in multiple ways along the extension direction of the adjustment groove (11). The connecting rod (12) is rotatably connected to the support plate (13). The support plate (13) can rotate to align the through hole (14) with the screw holes (15). The multiple screw holes (15) are all located on the sliding trajectory of the through hole (14).

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