A multi-stage sampling device based on environmental monitoring equipment

Abstract

This invention discloses a multi-stage sampling device based on environmental monitoring equipment. The invention relates to the field of multi-stage sampling technology. The outer wall of the sampling rod is fixedly connected to the inner ring of the limiting plate. An upper limiting plate is connected to the upper side of the outer wall of the sampling rod. The outer wall of the sampling rod has a sampling port and a tube inlet, with the tube inlet located between the limiting plate and the upper limiting plate, and the sampling port located below the limiting plate. The inner wall of the sampling rod is slidably connected to the outer wall of the sampling tube. The outer wall of the sampling tube has a sampling groove. The advantages of this invention are: the tube inlet is hidden to prevent debris from entering, increasing the convenience of sampling; multiple sampling tubes are used to sample soil at different layers, achieving multi-stage sampling; the annular cover seals the sampling tube, preventing soil samples from falling out when the sampling tube is removed; and the annular opening is used to move the upper end of the annular cover above the sampling tube, improving the convenience of controlling the position of the annular cover.

Description

Technical Field

[0001] This invention relates to the field of multi-stage sampling technology, specifically a multi-stage sampling device based on environmental monitoring equipment. Background Technology

[0002] Environmental monitoring refers to the activities of environmental monitoring agencies in monitoring and measuring the environmental quality. Environmental monitoring determines the level of environmental pollution and environmental quality by monitoring and measuring indicators that reflect environmental quality. Sampling, also known as sampling, is a statistical analysis method that selects a portion of units from all units of the research object for investigation and analysis, and uses it to infer the quantitative characteristics of the population. This process seems simple, but it contains rigorous scientific logic and methods. Its purpose is to obtain information about the population efficiently and accurately through the study of a portion of the sample, thereby avoiding the huge consumption of time, manpower and material resources brought about by a comprehensive survey of a large population.

[0003] Common multi-stage sampling devices are inconvenient to conceal the sampling tubes during use, making it easy for debris to enter the device and affect the connection between sampling tubes. Furthermore, it is inconvenient to extract samples from different layers in batches during multi-stage sampling, affecting sampling efficiency. In addition, soil samples are prone to loosening during extraction, resulting in low soil sample integrity. To address these issues, we propose a multi-stage sampling device based on environmental monitoring equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage sampling device based on environmental monitoring equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage sampling device based on environmental monitoring equipment, comprising a sampling device body, the sampling device body including a lower rotating box and a multi-stage sampling mechanism connected to the lower end of the lower rotating box, the multi-stage sampling mechanism including a connecting cover, an inner receiving plate, a limiting plate, a sampling rod, a sampling tube, an annular cover, and an upper sealing cover, the lower end of the lower rotating box being spirally connected to the upper end of the connecting cover, the lower inner side of the connecting cover being connected to the outer wall of the inner receiving plate, the inner wall of the inner receiving plate being slidably connected to the outer wall of the sampling rod, the outer wall of the sampling rod being fixedly connected to the inner ring of the limiting plate, and an upper limiting plate being connected to the upper side of the outer wall of the sampling rod, with the inner receiving plate located between the limiting plate and the upper limit plate. Between the fixed plates, the outer wall of the sampling rod is provided with a sampling port and a tube inlet, and the tube inlet is vertically located in the area between the upper surface of the limiting plate and the lower surface of the upper limiting plate. The sampling port is located on the lower side of the limiting plate. The inner wall of the sampling rod is slidably connected to the outer wall of the sampling tube. The outer wall of the sampling tube is provided with a sampling groove. The side wall of the sampling groove is provided with an annular groove. The inner wall of the annular groove is slidably connected to the outer wall of the annular cover. The upper end of the sampling tube is connected to the lower end of the upper cover. The upper end of the upper cover is provided with an annular through-hole, and the upper end of the annular cover extends to the outside of the sampling tube through the annular through-hole. The upper end of the sampling tube is connected to a connecting mechanism, and the upper end of the sampling rod is connected to a driving mechanism.

[0006] As a further aspect of the present invention: the driving mechanism includes a driving gear, a power motor, a lead screw, a transmission gear, and a lifting plate. The upper side of the outer wall of the limiting plate is connected to the outer wall of the power motor, and the output end of the power motor is connected to the inner ring of the driving gear.

[0007] As a further aspect of the present invention: the inner wall of the sampling rod is provided with an annular groove, the lower wall of the annular groove is rotatably connected to the lower end of the lead screw, the upper end of the lead screw extends to the outer side of the sampling rod, the upper side of the outer wall of the lead screw is connected to the inner ring of the transmission gear, and the transmission gear meshes with the drive gear.

[0008] As a further embodiment of the present invention: the connecting mechanism includes a connecting protrusion, a lower sealing plate and a screw, the upper end of the sampling tube is connected to the lower end of the connecting protrusion, the lower end of the sampling tube is connected to the upper end of the lower sealing plate, the lower end of the lower sealing plate is provided with a connecting groove, and the connecting groove and the connecting protrusion cooperate with each other, and the upper end of the connecting protrusion is connected to a connecting mechanism.

[0009] As a further aspect of the present invention: the outer wall of the lower sealing plate has two side grooves, and threaded holes are provided on the side of the two side grooves that are close to each other. The inner walls of the two threaded holes are spirally connected to the outer walls of the screws, and the two screws extend into the interior of the connecting groove. The outer wall of the connecting protrusion has a concave hole, and the screw is screwed into the concave hole of the connecting groove through the threaded hole to achieve fastening.

[0010] As a further embodiment of the present invention: the connecting mechanism includes a connecting rod, a lower pressure plate, and a top block. The upper end of the connecting protrusion is provided with a lifting hole. The inner wall of the lifting hole is slidably connected to the outer wall of the connecting rod. The lower end of the connecting rod extends into the sampling groove.

[0011] As a further embodiment of the present invention: the upper end of the connecting rod is provided with a connecting hole, the inner wall of the connecting hole is provided with an internal thread, the lower end of the connecting rod is connected to the upper end of the lower pressure plate, and the outer wall of the lower pressure plate is provided with a block hole.

[0012] As a further embodiment of the present invention: the upper end of the inner wall of the sampling groove is connected to the top block, and the top block and the avoidance hole cooperate with each other; the lower end of the lower pressure plate is provided with an annular through groove; and the upper side of the lower pressure plate is connected to a spring mechanism.

[0013] As a further embodiment of the present invention: the lowering mechanism includes a lowering plate and a lowering spring. The upper end of the lowering spring is connected to the top wall of the sampling groove, and the lower end is connected to the lowering plate. The lower end of the lowering spring is connected to the upper end of the lowering plate, and the lowering plate and the lower pressure plate cooperate with each other.

[0014] Compared with the prior art, the beneficial effects of the present invention by adopting the above technical solution are as follows:

[0015] 1. This invention allows the sampling rod to be inserted into the soil by rotating through the lower rotating box. The connecting cover and inner plate can connect the sampling rod to the lower rotating box while hiding the sampling port to prevent debris from entering the port. It can also expose the sampling port when the sampling tube is taken out from inside the port, increasing the convenience of sampling. Multiple sampling tubes can be used to sample different layers of soil to achieve the purpose of multi-level sampling. The annular cover can seal the sampling tube to prevent soil samples from falling out when the sampling tube is taken out. The annular opening is used to move the upper end of the annular cover above the sampling tube, improving the convenience of controlling the position of the annular cover.

[0016] 2. This invention provides power to the lead screw for rotation via a power motor, and transmits the power to the lead screw through drive gears and transmission gears. The lifting plate is used to push the sampling tubes up and down, enabling the replacement of different sampling tubes. At the same time, the connecting protrusion and connecting groove cooperate with each other to make the adjacent sampling tubes fit more tightly and stably. The screw is used to further strengthen the stability between adjacent sampling tubes, and also enables multiple sampling tubes to be synchronized, allowing multiple sampling tubes to rotate synchronously, which facilitates the control of the angle of multiple sampling tubes.

[0017] 3. This invention allows for connection to external devices via connecting rods and connecting holes, enabling further control over the position of the lower pressure plate. The lower pressure plate compresses the soil sample, shaping it and preventing it from becoming too loose, thus improving the integrity of the soil sample during transport. The blocking hole cooperates with the top block to ensure smoother lifting and lowering of the lower pressure plate, while the top block fixes the position of the lower pressure plate. The lower spring plate and lower spring spring press down on the lower pressure plate, ensuring it remains stably above the top block and reducing the probability of the lower pressure plate falling into the sampling slot.

[0018] 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 study, or may be learned from the practice of the invention. Attached Figure Description

[0019] Figure 1 This is an overall three-dimensional schematic diagram of an embodiment of the present invention;

[0020] Figure 2 This is a three-dimensional schematic diagram of the sampling rod in an embodiment of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of the connecting cover in an embodiment of the present invention;

[0022] Figure 4 This is a three-dimensional schematic diagram of the limiting disk in an embodiment of the present invention;

[0023] Figure 5 for Figure 4 Enlarged diagram of A in the middle;

[0024] Figure 6 This is a three-dimensional schematic diagram of the lead screw in an embodiment of the present invention;

[0025] Figure 7 This is a three-dimensional schematic diagram of the sampling tube in an embodiment of the present invention;

[0026] Figure 8 This is a three-dimensional schematic diagram of the annular cover in an embodiment of the present invention;

[0027] Figure 9 This is a three-dimensional schematic diagram of the lower sealing plate in an embodiment of the present invention;

[0028] Figure 10 This is a three-dimensional schematic diagram of the upper cover in an embodiment of the present invention;

[0029] Figure 11 This is a three-dimensional schematic diagram of the lower spring disc in an embodiment of the present invention;

[0030] Figure 12 This is a three-dimensional schematic diagram of the lower pressure plate in an embodiment of the present invention.

[0031] In the diagram: 1. Sampling device body; 11. Lower rotating box; 2. Multi-stage sampling mechanism; 201. Connecting cover; 202. Inner connecting plate; 203. Limiting plate; 204. Sampling rod; 205. Sampling port; 206. Taking tube port; 207. Sampling tube; 208. Annular groove; 209. Annular cover; 210. Upper cover; 211. Annular through-hole; 3. Drive mechanism; 31. Drive gear; 32. Power motor; 33. Lead screw; 34. Annular groove; 35. Transmission gear; 36. Lifting plate; 4. Connecting mechanism; 41. Connecting protrusion; 42. Lower sealing plate; 43. Connecting groove; 44. Screw; 45. Side groove; 5. Connecting mechanism; 51. Connecting rod; 52. Connecting hole; 53. Lower pressure plate; 54. Avoiding block hole; 55. Top block; 6. Lower spring mechanism; 61. Lower spring plate; 62. Lower spring spring. Detailed Implementation

[0032] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0033] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example

[0034] This invention discloses a multi-level sampling device based on environmental monitoring equipment. In a large farmland area where soil pollution is being investigated, the farmland has previously experienced varying degrees of pesticide and fertilizer use, as well as irrigation with industrial wastewater. The soil composition is complex, and researchers need to obtain soil samples at different depths to analyze the distribution and content changes of pollutants in the soil, thereby assessing the degree of soil pollution and providing accurate data support for the subsequent development of targeted soil remediation plans.

[0035] However, in practice, researchers have found that conventional soil sampling equipment has many problems. Ordinary sampling devices can only collect soil samples from a single depth at a time. To obtain samples from different depths, it is necessary to insert and remove the sampling device multiple times, which is not only time-consuming and laborious, but also causes significant damage to the soil structure, affecting the accuracy of the samples. In addition, existing sampling devices cannot effectively prevent external impurities from entering the samples when they are taken out, which leads to sample contamination and affects the reliability of the test results, making it difficult for researchers to accurately determine the true extent of soil pollution.

[0036] Therefore, in order to effectively solve the above problems, this application proposes a multi-stage sampling device based on environmental monitoring equipment, as shown in the attached drawings of the specification. Figure 1-12As shown, the device includes a sampling device body 1, which includes a lower rotating box 11 and a multi-stage sampling mechanism 2 connected to the lower end of the lower rotating box 11. The multi-stage sampling mechanism 2 includes a connecting cover 201, an inner receiving plate 202, a limiting plate 203, a sampling rod 204, a sampling tube 207, an annular cover 209, and an upper cover 210. The lower end of the lower rotating box 11 is spirally connected to the upper end of the connecting cover 201. The lower inner side of the connecting cover 201 is connected to the outer wall of the inner receiving plate 202. The inner wall of the inner receiving plate 202 is slidably connected to the outer wall of the sampling rod 204. The outer wall of the sampling rod 204 is fixedly connected to the inner ring of the limiting plate 203. An upper limiting plate is connected to the upper side of the outer wall of the sampling rod 204, and the inner receiving plate 202 is located between the limiting plate 203 and the upper limiting plate. The outer wall of the sampling rod 204 has a sampling port 205 and a sampling tube port 207. 06, and the sampling port 206 is vertically located in the area between the upper surface of the limiting plate 203 and the lower surface of the upper limiting plate. The sampling port 205 is located on the lower side of the limiting plate 203. The inner wall of the sampling rod 204 is slidably connected to the outer wall of the sampling tube 207. The outer wall of the sampling tube 207 is provided with a sampling groove, which is used to contain soil samples and is sealed by cooperating with the annular cover 209 through the annular groove 208. The inner wall of the annular groove 208 is slidably connected to the outer wall of the annular cover 209. The upper end of the sampling tube 207 is connected to the lower end of the upper cover 210. The upper end of the upper cover 210 is provided with an annular opening 211. The upper end of the annular cover 209 extends to the outside of the sampling tube 207 through the annular opening 211. The upper end of the sampling tube 207 is connected to the connecting mechanism 4, and the upper end of the sampling rod 204 is connected to the driving mechanism 3.

[0037] Multiple sampling tubes 207 are provided, and multiple sampling tubes 207 can be detachably connected together.

[0038] Specifically, the lower rotating box 11 allows the sampling rod 204 to be inserted into the soil by rotation. The connecting cover 201 and the inner connecting plate 202 connect the sampling rod 204 to the lower rotating box 11 while concealing the sampling port 206. The sampling port 205 is used to transfer soil into the sampling tube 207, which is used to collect soil samples. When the sampling rod 204 is inserted into different layers of soil, multiple sampling tubes 207 can be used to sample soil from different layers, achieving the purpose of multi-level sampling. The annular cover 209 seals the sampling tube 207 to prevent soil samples from falling out when the sampling tube 207 is removed. The annular opening 211 moves the upper end of the annular cover 209 above the sampling tube 207, thereby facilitating the control of the position of the annular cover 209. Example

[0039] The drive mechanism 3 includes a drive gear 31, a power motor 32, a lead screw 33, a transmission gear 35, and a lifting plate 36. The upper side of the outer wall of the limiting plate 203 is connected to the outer wall of the power motor 32, and the output end of the power motor 32 is connected to the inner ring of the drive gear 31.

[0040] The inner wall of the sampling rod 204 is provided with an annular groove 34. The lower wall of the annular groove 34 is rotatably connected to the lower end of the lead screw 33. The upper end of the lead screw 33 extends to the outer side of the sampling rod 204. The upper side of the outer wall of the lead screw 33 is connected to the inner ring of the transmission gear 35, and the transmission gear 35 meshes with the drive gear 31.

[0041] The connecting mechanism 4 includes a connecting protrusion 41, a lower sealing plate 42, and a screw 44. The upper end of the sampling tube 207 is connected to the lower end of the connecting protrusion 41, and the lower end of the sampling tube 207 is connected to the upper end of the lower sealing plate 42. The lower end of the lower sealing plate 42 is provided with a connecting groove 43, and the connecting groove 43 and the connecting protrusion 41 cooperate with each other. The upper end of the connecting protrusion 41 is connected to a connecting mechanism 5.

[0042] The outer wall of the lower sealing plate 42 has two side grooves 45. The two side grooves 45 are respectively provided with threaded holes on the side that is close to each other. The inner walls of the two threaded holes are screwed to the outer walls of the screws 44. The two screws 44 extend into the interior of the connecting groove 43. The outer wall of the connecting protrusion 41 is provided with a concave hole. The screws 44 are screwed into the concave hole of the connecting groove 43 through the threaded hole to achieve fastening.

[0043] Specifically, the power motor 32 provides power for the rotation of the lead screw 33, and the power is transmitted to the lead screw 33 through the drive gear 31 and the transmission gear 35. The lifting plate 36 is used to push the sampling tube 207 to rise and fall, so as to realize the replacement between different sampling tubes 207. At the same time, the connecting protrusion 41 and the connecting groove 43 are used to cooperate with each other to make the connection between adjacent sampling tubes 207 tighter and more stable. The screw 44 is used to further strengthen the stability between adjacent sampling tubes 207, and at the same time, it can also make multiple sampling tubes 207 synchronous, so that multiple sampling tubes 207 can rotate synchronously. Example

[0044] The connecting mechanism 5 includes a connecting rod 51, a lower pressure plate 53, and a top block 55. The upper end of the connecting protrusion 41 is provided with a lifting hole. The inner wall of the lifting hole is slidably connected to the outer wall of the connecting rod 51. The lower end of the connecting rod 51 extends into the sampling groove.

[0045] The upper end of the connecting rod 51 is provided with a connecting hole 52, and the inner wall of the connecting hole 52 is provided with an internal thread. The lower end of the connecting rod 51 is connected to the upper end of the lower pressure plate 53, and the outer wall of the lower pressure plate 53 is provided with a block hole 54.

[0046] The upper end of the inner wall of the sampling groove is connected to the top block 55, and the top block 55 and the avoidance hole 54 cooperate with each other. The lower end of the lower pressure plate 53 is provided with an annular through groove, and the upper side of the lower pressure plate 53 is connected to the lower spring mechanism 6.

[0047] The lowering mechanism 6 includes a lowering plate 61 and a lowering spring 62. The upper end of the lowering spring 62 is connected to the top wall of the sampling groove, and the lower end is connected to the lowering plate 61. The lower end of the lowering spring 62 is connected to the upper end of the lowering plate 61, and the lowering plate 61 cooperates with the lower pressure plate 53.

[0048] The connecting hole 52 of the connecting rod 51 is engaged with the external device, which is rod-shaped and has an external thread at the lower end. The external thread and the internal thread are engaged with each other. After use, the external device can be removed from the upper end of the connecting rod 51.

[0049] Specifically, the connecting rod 51 and connecting hole 52 can be used to connect to external equipment, thereby further controlling the position of the lower pressure plate 53. The lower pressure plate 53 is used to press down the soil sample, making the soil sample more formed when it is taken out, and avoiding the soil sample being too loose. The block hole 54 is used to cooperate with the top block 55 to make the lower pressure plate 53 move more smoothly when it rises and falls. The top block 55 is used to fix the position of the lower pressure plate 53. The lower spring plate 61 and the lower spring spring 62 are used to press down the lower pressure plate 53, so that the lower pressure plate 53 stays more stably above the top block 55, reducing the probability of the lower pressure plate 53 falling into the sampling slot.

[0050] Working principle:

[0051] First, place the sampling rod 204 at the lower end of the lower rotating box 11 to the desired sampling position. Then, start the lower rotating box 11, using it to drive the connecting cover 201, inner plate 202, and sampling rod 204 to rotate. Simultaneously, press down on the lower rotating box 11. The downward force will be transmitted to the sampling rod 204 through the limiting plate 203, causing the sampling rod 204 to rotate downwards into the soil. When it reaches the desired sampling layer, pull up the lower rotating box 11 and the connecting cover 201. At this time, the connecting cover 201 will move upwards along the sampling rod 204, thus exposing the sampling port 206. At the same time, manually rotate the sampling tube 207 to ensure all sampling tubes are in place. The sampling tube 207 rotates 180 degrees to store the soil sample inside. The motor 32 is then activated, driving the lead screw 33 to rotate via the drive gear 31 and transmission gear 35. This rotation of the lead screw 33 causes the lifting plate 36 to rise and fall, thus pushing the sampling tube 207 upwards. When the sampling tube 207 is fully inside the sampling port 206, the annular cover 209 is rotated to seal the sampling slot. Simultaneously, the angle of the sampling tube 207 is adjusted, and the screw 44 is removed from the recess. At this point, the sampling tube 207 can be taken from the lower part of the sampling tube 207. The sample is removed from the connecting protrusion 41 and moved from the sampling port 206 to the outside of the sampling rod 204. After moving to the next layer that needs to be sampled, the lower sampling tube 207 is rotated so that the sampling groove of the sampling tube 207 and the sampling port 206 cooperate, allowing the soil sample of the current layer to enter the sampling tube 207. After the sampling tube 207 containing the soil sample is removed, it is spirally inserted into the connecting hole 52 of the connecting rod 51 using an external device. At this time, the connecting rod 51 can be rotated synchronously so that the blocking hole 54 in the lower pressure plate 53 cooperates with the top block 55. Then, the connecting rod 51 is pressed down, causing the lower pressure plate 53 to move. When the top block 55 is below, the connecting rod 51 and the lower pressure plate 53 are pressed down again. The pressure of the lower pressure plate 53 is used to compress the soil sample into shape. After the compression is completed, the lower pressure plate 53 is moved back to the top block 55 and rotated so that the block avoidance hole 54 of the lower pressure plate 53 avoids the position that cooperates with the top block 55. When the lower pressure plate 53 moves upward, it will contact the lower spring plate 61 and compress the lower spring plate 61 and the lower spring spring 62. At this time, the lower spring plate 61 will use its elasticity to press the lower pressure plate 53 tightly against the top block 55, increasing the stability of the lower pressure plate 53. At this point, the entire process is completed.

[0052] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0053] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 limiting the scope of protection of this invention.

[0054] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0055] For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A multi-stage sampling device based on environmental monitoring equipment, comprising a sampling device body (1), wherein the sampling device body (1) includes a lower rotating box (11) and a multi-stage sampling mechanism (2) connected to the lower end of the lower rotating box (11), characterized in that: The multi-stage sampling mechanism (2) includes a connecting cover (201), an inner receiving plate (202), a limiting plate (203), a sampling rod (204), a sampling tube (207), an annular cover (209), and an upper cover (210). The lower end of the lower rotating box (11) is spirally connected to the upper end of the connecting cover (201). The lower inner side of the connecting cover (201) is connected to the outer wall of the inner receiving plate (202). The inner wall of the sampling rod (204) is slidably connected to the outer wall of the sampling rod (204). The outer wall of the sampling rod (204) is fixedly connected to the inner ring of the limiting plate (203). An upper limiting plate is connected to the upper side of the outer wall of the sampling rod (204), and the inner plate (202) is located between the limiting plate (203) and the upper limiting plate. The outer wall of the sampling rod (204) is provided with a sampling port (205) and a tube inlet (206), and the tube inlet (206) is vertically positioned. In the area between the upper surface of the limiting plate (203) and the lower surface of the upper limiting plate, the sampling port (205) is located on the lower side of the limiting plate (203). The inner wall of the sampling rod (204) is slidably connected to the outer wall of the sampling tube (207). A sampling groove is provided on the outer wall of the sampling tube (207). An annular groove (208) is provided on the side wall of the sampling groove. The inner wall of the annular groove (208) is slidably connected to the outer wall of the annular cover (209). The upper end of the sampling tube (207) is connected to the lower end of the upper cover (210). The upper end of the upper cover (210) is provided with an annular opening (211), and the upper end of the annular cover (209) extends to the outside of the sampling tube (207) through the annular opening (211). The upper end of the sampling tube (207) is connected to a connecting mechanism (4), and the upper end of the sampling rod (204) is connected to a driving mechanism (3).

2. The multi-stage sampling device based on environmental monitoring equipment according to claim 1, characterized in that: The drive mechanism (3) includes a drive gear (31), a power motor (32), a lead screw (33), a transmission gear (35), and a lifting plate (36). The upper side of the outer wall of the limiting plate (203) is connected to the outer wall of the power motor (32), and the output end of the power motor (32) is connected to the inner ring of the drive gear (31).

3. A multi-stage sampling device based on environmental monitoring equipment according to claim 2, characterized in that: The inner wall of the sampling rod (204) is provided with an annular groove (34). The lower wall of the annular groove (34) is rotatably connected to the lower end of the lead screw (33). The upper end of the lead screw (33) extends to the outside of the sampling rod (204). The upper side of the outer wall of the lead screw (33) is connected to the inner ring of the transmission gear (35), and the transmission gear (35) meshes with the drive gear (31).

4. A multi-stage sampling device based on environmental monitoring equipment according to claim 1, characterized in that: The connecting mechanism (4) includes a connecting protrusion (41), a lower sealing plate (42), and a screw (44). The upper end of the sampling tube (207) is connected to the lower end of the connecting protrusion (41), and the lower end of the sampling tube (207) is connected to the upper end of the lower sealing plate (42). The lower end of the lower sealing plate (42) is provided with a connecting groove (43), and the connecting groove (43) and the connecting protrusion (41) cooperate with each other. The upper end of the connecting protrusion (41) is connected to a connecting mechanism (5).

5. A multi-stage sampling device based on environmental monitoring equipment according to claim 4, characterized in that: The outer wall of the lower sealing plate (42) has two side grooves (45). The two side grooves (45) are provided with threaded holes on the side that is close to each other. The inner walls of the two threaded holes are spirally connected to the outer wall of the screw (44). The two screws (44) extend into the interior of the connecting groove (43). The outer wall of the connecting protrusion (41) is provided with a concave hole. The screw (44) is screwed into the concave hole of the connecting groove (43) through the threaded hole to achieve fastening.

6. A multi-stage sampling device based on environmental monitoring equipment according to claim 4, characterized in that: The connecting mechanism (5) includes a connecting rod (51), a lower pressure plate (53), and a top block (55). The upper end of the connecting protrusion (41) is provided with a lifting hole. The inner wall of the lifting hole is slidably connected to the outer wall of the connecting rod (51). The lower end of the connecting rod (51) extends into the sampling groove.

7. A multi-stage sampling device based on environmental monitoring equipment according to claim 6, characterized in that: The upper end of the connecting rod (51) is provided with a connecting hole (52), the inner wall of the connecting hole (52) is provided with an internal thread, the lower end of the connecting rod (51) is connected to the upper end of the lower pressure plate (53), and the outer wall of the lower pressure plate (53) is provided with a block hole (54).

8. A multi-stage sampling device based on environmental monitoring equipment according to claim 7, characterized in that: The upper end of the inner wall of the sampling groove is connected to the top block (55), and the top block (55) and the avoidance hole (54) cooperate with each other. The lower end of the lower pressure plate (53) is provided with an annular through groove, and the upper side of the lower pressure plate (53) is connected to the lower spring mechanism (6).

9. A multi-stage sampling device based on environmental monitoring equipment according to claim 8, characterized in that: The lowering mechanism (6) includes a lowering plate (61) and a lowering spring (62). The upper end of the lowering spring (62) is connected to the top wall of the sampling groove, and the lower end is connected to the lowering plate (61). The lowering plate (61) and the lowering plate (53) cooperate with each other.

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