Soil detection equipment

Abstract

The invention belongs to the technical field of soil detection, and particularly discloses soil detection equipment which is provided with a sampling tube, the sampling tube is used for soil sampling, the sampling tube is of an assembled structure, a partition assembly is arranged in the sampling tube, the partition assembly comprises a mounting rod and a partition piece, and the mounting rod is arranged in the sampling tube along a tube shaft of the sampling tube; and the plurality of dividing pieces are sequentially arranged on the mounting rod at intervals along the rod length of the mounting rod. The interior of the sampling pipe of the pipe body structure is divided into the multiple independent cavities through the multiple dividing pieces, the sampling pipe is in a folded state when being inserted into soil, the tubular structure is filled with soil samples after the sampling pipe is inserted into the soil, then the dividing pieces are unfolded, and each independent cavity achieves temporary storage of the soil samples; and then the sampling tube is taken out from the soil, so that the problems that the samples are easy to fall off and soil samples with different depths are mixed in the whole sampling process can be effectively solved, and the factor of generating errors on an analysis structure for later detection is further avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of soil detection, and in particular relates to soil detection equipment. Background Art

[0002] Light sand and sandy loam are the most suitable soil types for growing cotton. These soils are highly porous, breathable, and well-drained, which are among the most ideal conditions for cotton growth.

[0003] In the cotton planting process, soil nutrients are one of the important factors in cotton production capacity, and the regulation of soil nutrients requires balanced fertilization for different planting soils. In the specific implementation, it is necessary to test the planting soil, so as to more clearly understand the profit and loss status of the soil, understand the needs of crops, guide scientific and reasonable fertilization operations, and improve the fertilization level of cotton crops.

[0004] In the process of soil testing, it is first necessary to sample the planting soil. Since cotton is mostly planted in light sandy soil and sandy loam, when sampling, the sample is prone to fall off when it is separated from the ground after sampling. What's more, when the soil sample is separated from the sampling head, it is easy for the soil layers to mix, resulting in improper sample collection, which will affect the research and analysis of the soil. Summary of the invention

[0005] In view of the above-mentioned problems, the purpose of the present invention is to provide a soil testing device, which can effectively avoid the phenomenon that samples easily fall off when leaving the ground after sampling and soils at different depths are mixed during subsequent unloading.

[0006] The technical solution of the present invention is: a soil detection device, having a sampling tube, the sampling tube is used for soil sampling, the sampling tube is an assembled structure, and a partition component is arranged inside the sampling tube, and the partition component includes:

[0007] A mounting rod is arranged inside the sampling tube along the tube axis of the sampling tube;

[0008] There are multiple dividing parts, and the multiple dividing parts are arranged on the mounting rod in sequence along the length of the mounting rod; each of the dividing parts includes: a fixed rod, one end of which is arranged on the mounting rod and is perpendicular to the mounting rod, and the other end is in contact with the inner wall of the tube body structure; a rotating rod, one end of which is arranged on the fixed rod close to the mounting rod and rotates along the axis of the mounting rod; a blocking member is a flexible structure, which is folded and clamped between the fixed rod and the rotating rod, and can be stretched into an annular structure as the rotating rod rotates, and the outer side of the annular structure is in contact with the inner wall of the tube body structure; a transmission member is connected to the rotating rod, and is used to drive the rotating rod to rotate.

[0009] Furthermore, it also includes a drill rod assembly, the sampling tube is arranged on the drill rod, and a driving member is arranged on the drill rod. The driving member passes through the mounting rod and is connected to the transmission member, and the driving member is used to drive the transmission member to rotate.

[0010] Furthermore, the mounting rod is coaxial with the drill rod, and an assembly block is provided at one end of the fixed rod connected to the mounting rod. The assembly block is a cylindrical structure, coaxial with the mounting rod, an assembly cavity is provided inside the assembly block, and a rotating groove connected to the assembly cavity is provided on the side wall.

[0011] Furthermore, the transmission member comprises:

[0012] The first transmission gear is rotatably disposed in the assembly cavity and is coaxial with the assembly block;

[0013] A second transmission gear is rotatably disposed in the assembly cavity and meshes with the first transmission gear;

[0014] The third transmission gear is an internal gear, rotatably disposed in the assembly cavity and meshing with the second transmission gear;

[0015] The driving member is connected to the first transmission gear and is used to drive the first transmission gear to rotate; one end of the rotating rod is arranged on the outer side wall of the third transmission gear, and the other end passes through the rotating groove and contacts the inner side wall of the tubular structure.

[0016] Furthermore, the first transmission gear is provided with a through slot, and the through slot is provided with a clamping slot;

[0017] The drill rod, the mounting rod, the assembly block and the connection between the sampling tube and the drill rod are all provided with a hollow channel;

[0018] The driving member comprises: a driving rod, which passes through the hollow channel and the through slot; a plurality of clamping blocks, which are sequentially arranged on the side wall of the driving rod at intervals along the length direction of the driving rod, and the positions of the clamping blocks and the clamping slots correspond one to one.

[0019] Furthermore, a support rod is provided at the bottom of the blocking member, and there are a plurality of the support rods, which are circumferentially spaced and distributed with the center point of the bottom surface of the blocking member as the center.

[0020] Furthermore, the side of the support rod close to the mounting rod is rotatably sleeved on the mounting rod through a circular ring, and the side away from the mounting rod is sequentially connected through a traction rope and finally connected to one end of the inner wall of the rotating rod contacting the tube structure through the traction rope.

[0021] Furthermore, the sampling tube comprises:

[0022] A substrate body, arranged on the drill rod assembly;

[0023] The assembly plate body is movably arranged on the base plate body and forms a tube structure with the base plate body.

[0024] Furthermore, the substrate body comprises:

[0025] First seal board;

[0026] The first side plate is vertically arranged on the lower end surface of the first side plate; the mounting rod is arranged on the lower end surface of the first sealing plate, and the drill rod assembly is arranged on the upper end surface of the first sealing plate.

[0027] Furthermore, there are multiple assembly plates, and each of the multiple assembly plates includes:

[0028] Second sealing board;

[0029] A second side plate, vertically arranged on the lower end surface of the second sealing plate;

[0030] The first side plate and the second side plate, and the second side plates are connected by slots and blocks. The first side plate and the second side plate constitute the side wall of the tube structure; the first sealing plate and the second side plate constitute the sealing cover of the non-sampling end of the tube structure.

[0031] The soil detection method of the present invention is as follows: when in use, the tubular structure is inserted into the soil through a drill rod. Then, the driving rod is inserted through the drill rod, the mounting rod, the assembly block, and the hollow channel provided at the connection between the substrate body and the drill rod, and then the driving rod is rotated to drive the first transmission gear to rotate, and the power is transmitted to the third transmission gear through the second transmission gear, thereby driving the rotating rod to rotate. When the rotating rod rotates, the support rod is pulled by the traction rope to rotate around the ring as the center, and the blocking member is driven to expand to form a circular pancake-shaped structure to divide the soil sample, thereby realizing the division of the soil sample in the tubular structure. Then, the tubular structure is pulled out of the soil through the drill rod, and the assembly plate body is disassembled from the substrate body to collect soil at different depths. Then, the soil samples at different depths are analyzed and tested.

[0032] Compared with the prior art, the beneficial effect of the present invention lies in that: the present invention divides the interior of the sampling tube of the tube structure into multiple independent cavities through multiple dividing pieces, and the sampling tube is in a folded state when inserted into the soil. After the sampling tube is inserted into the soil, the interior of the tubular structure is filled with soil samples, and then the dividing pieces are stretched out, and each independent cavity is used to temporarily store the soil samples. Then the sampling tube is taken out of the soil. The entire sampling process can effectively avoid the problem of easy falling off of samples and mixing of soil samples at different depths, thereby avoiding factors that cause errors in the analysis structure of later detection.

[0033] Moreover, during the subsequent unloading of samples, the assembly plate body can be directly removed from the base plate body, and then soil samples from different independent cavities can be collected and retained, which has the advantages of simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the internal structure of the sampling tube of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the dividing piece of the present invention;

[0037] Figure 4 is a structural cross-sectional view of the partition of the present invention;

[0038] Figure 5 is a structural cross-sectional view of the transmission member of the present invention;

[0039] Figure 6 It is a schematic diagram of the structure of the driving member of the present invention;

[0040] Figure 7 It is a structural schematic diagram of the rotating rod of the present invention;

[0041] Figure 8 is a schematic structural diagram of the dividing member when the blocking member of Example 1 of the present invention is unfolded;

[0042] Fig. 9 This is an exploded view of the structure of the sampling tube of Example 1 of the present invention;

[0043] Fig.10 This is an exploded view of the structure of the sampling tube of Example 2 of the present invention;

[0044] Fig.11 is a schematic diagram of the structure of a sampling tube in Example 3 of the present invention;

[0045] Fig.12 is a schematic diagram of the structure of a sampling tube in Example 4 of the present invention;

[0046] Fig.13 It is a structural diagram of the stretching process of the split piece of the present invention.

[0047] Among them, 1-sampling tube, 11-base plate, 111-first sealing plate, 112-first side plate, 12-assembly plate, 121-second sealing plate, 122-second side plate, 13-guide groove, 14-fastening groove, 15-pull ring, 2-drill rod, 20-driving member, 201-driving rod, 202-block, 3-mounting rod, 4-dividing member, 41-fixed rod, 410-assembly block, 42-rotating rod, 420-cutting blade, 43-blocking member, 430-support rod, 44-transmission member, 441-first transmission gear, 4410-through groove, 4411-slot, 442-second transmission gear, 443-third transmission gear. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1 To the attached Fig.13 , the specific implementation methods of the present invention are described in detail. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0050] Example 1

[0051] like Figure 1 , 2 A soil detection device shown in the figure has a sampling tube 1, which is used for soil sampling. The sampling tube 1 is an assembled structure, and a partition component is arranged inside it. The partition component divides the inner cavity of the tube structure into multiple independent storage cavities.

[0052] The partition assembly includes a mounting rod 3 and a partitioning piece 4. The mounting rod 3 is arranged along the tube length direction of the tube structure. There are multiple partitioning pieces 4, and the multiple partitioning pieces 4 are arranged on the mounting rod 3 in sequence and spaced apart along the length of the mounting rod 3.

[0053] like Figure 3 As shown, the plurality of dividing members 4 each include a fixed rod 41, a rotating rod 42, a blocking member 43 and a transmission member 44; one end of the fixed rod 41 is vertically arranged on the mounting rod 3, and the other end is in contact with the inner wall of the tube structure; the rotating rod 42 is rotatably arranged at one end of the fixed rod 41 connected to the mounting rod 3, and can rotate on a plane formed by the fixed rod 41 and the rotating rod 42 and perpendicular to the mounting rod 3 with the connection point as the center; Fig.13 As shown, the blocking member 43 is a flexible structure, which is folded and clamped between the fixed rod 41 and the rotating rod 42, and can be stretched into a round pancake-shaped structure that contacts the inner wall of the tube structure as the rotating rod 42 rotates; the transmission member 44 is connected to the rotating rod 42 and is used to drive the rotating rod 42 to rotate.

[0054] Preferably, a drill rod assembly 2 is further included, the sampling tube 1 is arranged on the drill rod 2, a driving member 20 is arranged on the drill rod 2, the driving member 20 passes through the mounting rod 3 and is connected to the transmission member 44, and the driving member 20 is used to drive the transmission member 44 to rotate.

[0055] Preferably, Figure 2 , 3 As shown, the mounting rod 3 is coaxial with the drill rod 2, and an assembly block 410 is provided at one end of the fixed rod 41 connected to the mounting rod 3. The assembly block 410 is a cylindrical structure, which is coaxial with the mounting rod 3, and has an assembly cavity inside, and a rotating groove connected to the assembly cavity on the side wall. The coaxiality of the mounting rod 3 and the drill rod 2 can facilitate the control of the overall balance during sampling, and on the other hand, it is convenient for the subsequent driving member 20 to vertically extend to drive the transmission member 44.

[0056] Preferably, Figure 4 As shown, the transmission member 44 includes a first transmission gear 441, a second transmission gear 442 and a third transmission gear 443; the first transmission gear 441 is arranged in the assembly cavity through a bearing and is coaxial with the assembly block 410; the second transmission gear 442 is arranged in the assembly cavity through a bearing and is meshed with the first transmission gear 441; the third transmission gear 443 is an internal gear, rotatably arranged in the assembly cavity, and is meshed with the second transmission gear 442.

[0057] The driving member 20 is connected to the first transmission gear 441 and is used to drive the first transmission gear 441 to rotate; one end of the rotating rod 42 is arranged on the outer wall of the third transmission gear 443, and the other end passes through the rotating groove and contacts the inner wall of the tube structure.

[0058] Preferably, Figure 5 As shown, a through slot 4410 is provided on the first transmission gear 441, and a clamping slot 4411 is provided on the through slot 4410. The drill rod 2, the mounting rod 3, the assembly block 410, and the connection between the substrate body 11 and the drill rod 2 are all provided with a hollow channel.

[0059] like Figure 6 As shown, the driving member 20 includes a driving rod 201 and a block 202; the driving rod 201 passes through the hollow passage and the through slot 4410; there are multiple blocks 202, which are sequentially arranged on the side wall of the driving rod 201 along the length direction of the driving rod 201, and the blocks 202 correspond to the slots 4411. When in use, the driving rod 201 is inserted through the hollow passage provided at the connection between the drill rod 2, the mounting rod 3, the assembly block 410, and the substrate body 11 and the drill rod 2. When the block 202 corresponds to the slots 4411 and is inserted into the slots 4411, the first transmission gear 441 is driven to rotate by rotating the driving rod 201, thereby driving the transmission member 44.

[0060] Preferably, Figure 7 As shown, a cutting blade 420 is provided on the side wall of the rotating rod 42 close to the rotation direction. When in use, since the rotating rod 42 needs to cut the soil in the tube structure of the sampling tube 1 horizontally, the cutting blade 420 can more easily divide the soil.

[0061] Preferably, Figure 8 As shown, a support rod 430 is provided at the bottom of the blocking member 43, and there are multiple support rods 430, and the multiple support rods 430 are circumferentially spaced with the center point of the bottom surface of the blocking member 43 as the center. In actual use, the blocking member 43 is supported by the support rod 430 to prevent the soil sample from being affected by mass factors and causing the blocking member 43 to deform, thereby causing the soil sample to leak. Among them, the blocking member 43 can be made of materials such as cloth, flexible rubber pads, paper, etc., and this embodiment uses cloth material.

[0062] Preferably, the side of the support rod 430 close to the mounting rod 3 is rotatably sleeved on the mounting rod 3 through a circular ring, and the side away from the mounting rod 3 is sequentially connected through a traction rope and finally connected to one end of the inner wall of the rotating rod 42 contacting the tube structure through the traction rope. On the one hand, one end of the support rod 430 is supported by the circular ring and can be rotated, and on the other hand, the other end of the support rod 430 is supported by the traction rope and traction is achieved. In actual use, when the rotating rod 42 rotates, the traction rope pulls the support rod 430 to rotate around the circular ring, thereby driving the blocking member 43 to expand to form a round pancake-shaped structure to divide the soil sample.

[0063] Preferably, Fig. 9 As shown, the substrate body 11 includes a first sealing plate 111 and a first side plate 112, and the first side plate 112 is vertically arranged on the lower end surface of the first side plate 112; the mounting rod 3 is arranged on the lower end surface of the first sealing plate 111, and the drill rod 2 is arranged on the upper end surface of the first sealing plate 111. There are multiple assembly plate bodies 12, and the multiple assembly plate bodies 12 all include a second sealing plate 121 and a second side plate 122, and the second side plate 122 is vertically arranged on the lower end surface of the second sealing plate 121. The first side plate 112 and the second side plate 122, and the second side plates 122 are connected by card grooves and card blocks, and the first side plate 112 and the second side plate 122 constitute the side wall of the tube structure; the first sealing plate 111 and the second side plate 122 constitute the cover of the non-sampling end of the tube structure. After the sampling is completed, the assembly plate body 12 is removed from the substrate body 11, which is more conducive to unloading the soil sample.

[0064] The soil detection method of this embodiment is:

[0065] Before use, the assembly plate body 12 and the base plate body 11 are assembled to form a tube structure.

[0066] When in use, the tube structure is inserted into the soil through the drill rod 2, wherein the conventional sampling depth for cotton-growing soil is 0 cm to 60 cm, so the tube length of the tube structure of this embodiment is 60 cm. In actual use, it can be appropriately adjusted according to specific needs.

[0067] Then, the driving rod 201 is inserted through the hollow passage provided at the connection between the drill rod 2, the mounting rod 3, the assembly block 410 and the base body 11 and the drill rod 2, and then the driving rod 201 is rotated to drive the first transmission gear 441 to rotate, and the power is transmitted to the third transmission gear 443 through the second transmission gear 442, thereby driving the rotating rod 42 to rotate. When the rotating rod 42 rotates, the support rod 430 is pulled by the traction rope to rotate around the ring as the center, and the blocking member 43 is driven to expand to form a round pancake-shaped structure to divide the soil sample, thereby realizing the division of the soil sample in the tubular structure.

[0068] Then, the pipe structure is pulled out of the soil by the drill rod 2, and the assembly plate 12 is removed from the base plate 11 to collect soil at different depths. Then, the soil samples at different depths are analyzed and tested.

[0069] Example 2

[0070] The difference from Example 1 is that: preferably, Fig.10 As shown, guide rail grooves 13 for limiting the rotation rod 42 are provided on the inner side walls of the first side plate 112 and the inner side walls of the second side plate 122 .

[0071] In actual use, the guide rail groove 13 can not only limit the rotation of the rotating rod 42 so that the blocking member 43 can be smoothly deployed, but also support the end of the support rod 430 so that the blocking member 43 has good stability after being deployed.

[0072] Example 3

[0073] The difference from Example 2 is that: preferably, Fig.11 As shown, fastening grooves 14 are provided on the outer side walls of the first side plate 112 and the second side plate 122; fasteners are provided in the fastening grooves 14, and the fasteners are used to fasten the connection between the first side plate 112 and the second side plate 122. The fasteners can be wire ties, cable ties, iron wires, etc., and wire ties are used in this embodiment.

[0074] In actual use, fasteners are used to further fix the substrate body 11 and the assembly plate body 12 to avoid the problem of the assembly plate body 12 falling off from the substrate body 11 during the sampling process, resulting in sampling failure.

[0075] Example 4

[0076] The difference from Example 2 is that: preferably, Fig.12As shown, a pull ring 15 is provided on the second sealing plate 121 .

[0077] When unloading the sample, the assembly plate body 12 is removed from the base plate body 11 through the pull ring 15, which facilitates the disassembly operation and avoids excessive movement when disassembling the assembly plate body 12, which may cause a large impact on the soil sample in the tube structure and cause the soil to be mixed or spilled.

[0078] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A soil testing device, comprising a sampling tube (1), characterized in that: The sampling tube (1) is used for soil sampling. The sampling tube (1) is an assembled structure, and a partition component is arranged inside the sampling tube. The partition component comprises: A mounting rod (3) is arranged inside the sampling tube (1) along the tube axis of the sampling tube (1); There are a plurality of split parts (4), and the plurality of split parts (4) are arranged on the mounting rod (3) at intervals along the length of the mounting rod (3); each of the split parts (4) comprises: a fixed rod (41), one end of which is arranged on the mounting rod (3) and is perpendicular to the mounting rod (3), and the other end of which contacts the inner wall of the tube structure; a rotating rod (42), one end of which is arranged at one end of the fixed rod (41) close to the mounting rod (3) and rotates along the axis of the mounting rod (3); a blocking member (43), which is a flexible structure, folded and clamped between the fixed rod (41) and the rotating rod (42), and can be stretched into an annular structure as the rotating rod (42) rotates, and the outer side of the annular structure contacts the inner wall of the tube structure; a transmission member (44), which is connected to the rotating rod (42) and is used to drive the rotating rod (42) to rotate.

2. A soil testing device as claimed in claim 1, characterized in that: It also comprises a drill rod assembly (2), the sampling tube (1) is arranged on the drill rod (2), a driving member (20) is arranged on the drill rod (2), the driving member (20) passes through the mounting rod (3) and is connected to the transmission member (44), and the driving member (20) is used to drive the transmission member (44) to rotate.

3. A soil testing device as claimed in claim 2, characterized in that: The mounting rod (3) is coaxial with the drill rod (2); an assembly block (410) is provided at one end of the fixed rod (41) connected to the mounting rod (3); the assembly block (410) is a cylindrical structure coaxial with the mounting rod (3); an assembly cavity is provided inside the assembly block (410); and a rotation groove connected to the assembly cavity is provided on the side wall.

4. A soil testing device as claimed in claim 2, characterized in that: The transmission member (44) comprises: The first transmission gear (441) is rotatably disposed in the assembly cavity and is coaxial with the assembly block (410); The second transmission gear (442) is rotatably disposed in the assembly cavity and meshes with the first transmission gear (441); The third transmission gear (443) is an internal gear, rotatably disposed in the assembly cavity and meshing with the second transmission gear (442); The driving member (20) is connected to the first transmission gear (441) and is used to drive the first transmission gear (441) to rotate; one end of the rotating rod (42) is arranged on the outer wall of the third transmission gear (443), and the other end passes through the rotating groove and contacts the inner wall of the tubular structure.

5. A soil testing device as claimed in claim 3, characterized in that: The first transmission gear (441) is provided with a through slot (4410), and the through slot (4410) is provided with a clamping slot (4411); The drill rod (2), the mounting rod (3), the assembly block (410) and the connection between the sampling tube (1) and the drill rod (2) are all provided with a hollow channel; The driving member (20) comprises: a driving rod (201) penetrating the hollow passage and the through slot (4410); a plurality of clamping blocks (202), the plurality of clamping blocks (202) being arranged in sequence and spaced apart on the side wall of the driving rod (201) along the length direction of the driving rod (201), and the positions of the clamping blocks (202) and the clamping slots (4411) corresponding one to one.

6. A soil testing device as claimed in claim 2, characterized in that: A support rod (430) is provided at the bottom of the blocking member (43), and there are a plurality of the support rods (430), which are circumferentially spaced with the center point of the bottom surface of the blocking member (43) as the center.

7. A soil testing device as claimed in claim 6, characterized in that: The side of the support rod (430) close to the mounting rod (3) is rotatably sleeved on the mounting rod (3) through a circular ring, and the side away from the mounting rod (3) is sequentially connected through traction ropes and finally connected through the traction rope to an end of the rotating rod (42) contacting the inner wall of the tube structure.

8. A soil testing device as claimed in claim 2, characterized in that: The sampling tube (1) comprises: A base plate (11) is arranged on the drill rod assembly (2); The assembly plate body (12) is movably arranged on the substrate body (11) and forms a tubular structure with the substrate body (11).

9. A soil testing device as claimed in claim 8, characterized in that: The substrate body (11) comprises: A first sealing plate (111); The first side plate (112) is vertically arranged on the lower end surface of the first side plate (112); the mounting rod (3) is arranged on the lower end surface of the first sealing plate (111); and the drill rod assembly (2) is arranged on the upper end surface of the first sealing plate (111).

10. A soil testing device as claimed in claim 9, characterized in that: There are a plurality of assembly plate bodies (12), and each of the plurality of assembly plate bodies (12) comprises: A second sealing plate (121); A second side plate (122) vertically arranged on the lower end surface of the second sealing plate (121); The first side plate (112) and the second side plate (122), and the second side plates (122) are connected by means of slots and blocks; the first side plate (112) and the second side plate (122) constitute the side wall of the tube structure; and the first sealing plate (111) and the second side plate (122) constitute the sealing cover of the non-sampling end of the tube structure.

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