Soil sampling device for environmental monitoring

Abstract

The invention belongs to the technical field of environmental monitoring equipment, and relates to a soil sampling device for environmental monitoring, which comprises a top plate, a bottom plate, a through hole, an outer cylinder, a first sampling port, two chutes, an inner cylinder, a second sampling port, a moving ring and a connecting piece, the lifting assembly is used for driving the outer cylinder to move up and down, so that the moving ring is in contact with the bottom plate, the inner cylinder is driven to move up and down in the outer cylinder, and the first sampling port and the second sampling port are overlapped and separated. The outer cylinder can be driven to move up and down through the lifting assembly, so that the moving ring is in contact with the bottom plate, the inner cylinder is driven to move up and down relative to the interior of the outer cylinder, a first sampling port and a second sampling port are overlapped and separated, and the second sampling port is opened after the outer cylinder enters soil, so that the soil enters the inner cylinder; and after sampling is completed, the second sampling opening is closed, and the outer cylinder is taken out from the soil, so that soil at other depths cannot enter the inner cylinder in the process that the outer cylinder enters and is taken out of the soil, and soil at different depths is prevented from being mixed.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental monitoring equipment and relates to a soil sampling device for environmental monitoring. Background Art

[0002] Environmental monitoring refers to the activities of environmental monitoring agencies to monitor and measure environmental quality. Environmental monitoring is to monitor and measure indicators that reflect environmental quality to determine the environmental pollution status and environmental quality. Soil testing is also an environmental testing item. When conducting soil testing, soil sampling is usually required.

[0003] At present, soil sampling is often carried out using a soil sampling device, which includes a sampling tube, a drill bit and a rotating mechanism. The drill bit is arranged at the lower end of the sampling tube, and the sampling tube is driven to rotate by the rotating mechanism. The sampling tube drives the drill bit to drill into the soil for sampling. During the rotation of the sampling tube, the soil enters from the sampling port on the side of the sampling tube. After obtaining enough soil, the sampling is completed.

[0004] However, since soil at different depths will directly enter through the sampling port during sampling, it is easy to cause the soil at different depths to mix, resulting in the unique chemical, physical or biological properties of the soil at different depths being masked, affecting the accuracy of the test results. Summary of the invention

[0005] The object of the present invention is to provide a soil sampling device for environmental monitoring, which can maintain the independence of soil at different depths and avoid mixing of soil at different depths to affect the accuracy of detection results.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of a soil sampling device for environmental monitoring provided by the present invention is as follows: A soil sampling device for environmental monitoring, comprising a top plate and a bottom plate arranged horizontally from top to bottom, the bottom plate and the top plate are connected by a support, a through hole is opened on the bottom plate, and further comprising: The outer cylinder is vertically arranged between the bottom plate and the top plate, and the lower end is close to the through hole. At least one first sampling port is opened on the side of the outer cylinder, and two slide grooves are vertically symmetrically opened on the side of the outer cylinder above the first sampling port.

[0007] The inner cylinder is arranged in the outer cylinder and is slidably connected with the inner wall of the outer cylinder. A second sampling port is provided on the side of the inner cylinder near the lower part of the first sampling port.

[0008] The moving ring is sleeved on the outer cylinder and is located close to the two slide grooves. The outer diameter of the moving ring is greater than the diameter of the through hole.

[0009] The connecting piece is arranged in the outer cylinder and is located close to the moving ring. The lower part of the connecting piece is connected to the inner cylinder, and the two sides of the connecting piece pass through two sliding grooves to be connected to the moving ring.

[0010] The lifting assembly is connected to the top plate and the outer cylinder respectively, and is used to drive the outer cylinder to move up and down, so that the moving ring contacts the bottom plate, and drives the inner cylinder to move up and down on the outer cylinder, so that the first sampling port and the second sampling port overlap and separate.

[0011] The present invention is also characterized in that: The connecting member includes: a moving block, which is arranged in the outer cylinder and is located near the two slide grooves. A transmission rod is vertically arranged between the moving block and the inner cylinder, and the two ends of the transmission rod are respectively connected to the moving block and the inner cylinder. Two connecting rods are respectively arranged horizontally in the two slide grooves, and the two ends of each connecting rod are respectively connected to the moving block and the inner side of the moving ring.

[0012] The lifting assembly includes: an electric telescopic rod, which is vertically arranged between the top plate and the outer cylinder, the upper end of which is connected to the top plate, and the lower end of which is connected to the outer cylinder through a box body. A first elastic member, which is vertically arranged in the outer cylinder and located on the upper part of the moving block, and the two ends of the first elastic member are respectively connected to the top of the outer cylinder and the moving block.

[0013] A baffle is obliquely arranged in the first sampling port, the lower end of the baffle is close to the inner cylinder and is rotatably connected to the first sampling port, the upper end of the baffle is close to the outside of the first sampling port, the lower part of the baffle is connected to the inside of the first sampling port through an obliquely arranged second elastic member, an opening and closing assembly is arranged in the first sampling port, the opening and closing assembly is respectively connected to the baffle and the moving block, and the opening and closing assembly is used to drive the baffle to swing up and down through the up and down movement of the moving block, thereby opening and closing the first sampling port.

[0014] The opening and closing assembly includes: a first plunger hydraulic cylinder, which is vertically arranged on the upper part of the moving block and is located in the first elastic member, and the two ends of the first plunger hydraulic cylinder are respectively connected to the moving block and the top of the outer cylinder. A liquid storage chamber is opened inside the top of the outer cylinder, and the liquid storage chamber is connected to the first plunger hydraulic cylinder. Two installation chambers are symmetrically opened inside the side of the outer cylinder and located below the liquid storage chamber. The first sampling port is located between the two installation chambers. A second plunger hydraulic cylinder is vertically arranged in each installation chamber, and the upper end of each second plunger hydraulic cylinder is connected to the top of the installation chamber, and the second plunger hydraulic cylinder is connected to the liquid storage chamber. The lower pressure piece is respectively connected to the two second plunger hydraulic cylinders and the baffle, and is used to drive the baffle to swing up and down through the extension and contraction of the two second plunger hydraulic cylinders.

[0015] The lower pressure piece includes: a sliding cavity, which is opened inside the side of the outer cylinder and is located between the two installation cavities and the first sampling port, and the sliding cavity is connected to each installation cavity through a vertically arranged guide hole. Two guide rods are respectively arranged in the two guide holes, and the upper end of each guide rod is connected to the lower end of the corresponding second plunger hydraulic cylinder. An arc plate is arranged in the sliding cavity and is slidably connected to the inner wall of the sliding cavity, and the lower end of each guide rod is connected to the arc plate. A pressure rod is vertically arranged at the lower part of the arc plate and is located close to the first sampling port, the upper end of the pressure rod is connected to the arc plate, and the lower end of the pressure rod passes through the bottom of the sliding cavity and is located in the first sampling port and contacts with the upper surface of the baffle.

[0016] A third elastic member is sleeved on the position of the pressure rod located inside the sliding cavity, and two ends of the third elastic member are respectively slidably connected with the arc plate and the bottom of the sliding cavity.

[0017] The lower end of the pressure rod is provided with a first roller, and the first roller is in contact with the upper part of the baffle.

[0018] The soil sampling device for environmental monitoring of the present invention has the following advantages: First, through the cooperation of the bottom plate, the outer cylinder, the inner cylinder, the moving ring, the connecting piece and the lifting assembly, the lifting assembly can drive the outer cylinder to move up and down, so that the moving ring contacts the bottom plate, and drives the inner cylinder to move up and down relative to the outer cylinder, so that the first sampling port and the second sampling port overlap and separate, so that after the outer cylinder enters the soil, the second sampling port is opened to allow the soil to enter the inner cylinder, and after the sampling is completed, the second sampling port is closed, and the outer cylinder is taken out of the soil, so that during the process of the outer cylinder entering and taking out the soil, soil at other depths will not enter the inner cylinder, thereby avoiding mixing of soils at different depths and ensuring the accuracy of the detection results.

[0019] Second, through the cooperation of the baffle, the second elastic member, the opening and closing assembly and the moving block, the baffle is driven to swing up and down in the first sampling port, opening and closing the first sampling port, preventing the soil at other depths from entering the first sampling port during the downward movement of the outer cylinder in the soil, and preventing the first sampling port from mixing into the second sampling port after the second sampling port is opened, thereby further preventing the mixing of soils at different depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0021] Figure 2 For the present invention Figure 1 A magnified view of the local structure of part A.

[0022] Figure 3 It is a schematic diagram of the inner side structure of the outer cylinder in the present invention.

[0023] Figure 4 For the present invention Figure 1 A magnified view of the local structure of part B.

[0024] Figure 5 It is a schematic diagram of the top view of the internal structure of the sliding cavity in the present invention.

[0025] Figure 6 For the present invention Figure 3 Enlarged view of the local structure of part C in the middle.

[0026] Reference numerals: 1. top plate, 2. support column, 3. box body, 4. outer tube, 5. inner tube, 6. bottom plate, 7. through hole, 8. electric telescopic rod, 9. partition, 10. sampling chamber, 11. first sampling port, 12. second sampling port, 13. baffle, 14. moving block, 15. moving ring, 16. slide groove, 17. connecting rod, 18. transmission rod, 19. limit plate, 20. first elastic member, 21. second elastic member, 22. third elastic member, 23. first plunger hydraulic cylinder, 24. second plunger hydraulic cylinder, 25. liquid storage chamber, 26. first roller, 27. installation chamber, 28. sliding chamber, 29. guide hole, 30. guide rod, 31. arc plate, 32. second roller, 33. pressure rod, 34. motor, 35. drill bit. DETAILED DESCRIPTION

[0027] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, such as A and / or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two. The following terms "first" and "second" are used for descriptive purposes only and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0028] like Figure 1 , Figure 2As shown, the present invention provides a soil sampling device for environmental monitoring, including a top plate 1, a bottom plate 6, an outer tube 4, an inner tube 5, a moving ring 15, a connecting member and a lifting assembly. The top plate 1 and the bottom plate 6 are relatively horizontally arranged from top to bottom, that is, the bottom plate 6 is arranged below the top plate 1, the bottom plate 6 is used to contact the ground, the bottom plate 6 and the top plate 1 are connected through a supporting member, and the top plate 1 is supported by the supporting member. A through hole 7 is opened on the bottom plate 6, and the outer tube 4 is vertically arranged between the bottom plate 6 and the top plate 1. The outer tube 4 is a structure with a closed upper end and an open lower end. The lower end of the outer tube 4 is close to the through hole 7, and the side of the outer tube 4 is At least one first sampling port 11 is provided on the surface, two slide grooves 16 are vertically symmetrically provided on the side of the outer cylinder 4 at a position above the first sampling port 11, each slide groove 16 is communicated with the inside of the outer cylinder 4, the inner cylinder 5 is arranged in the outer cylinder 4, both ends of the inner cylinder 5 are closed structures, the inner cylinder 5 is slidably connected to the inner wall of the outer cylinder 4, and the inner cylinder 5 slides up and down along the inner wall of the outer cylinder 4, and a second sampling port 12 is provided on the side of the inner cylinder 5 near the position below the first sampling port 11, and a moving ring 15 is sleeved on the outer cylinder 4, and the moving ring 15 is slidably connected to the side of the outer cylinder 4, and the position of the moving ring 15 is close to the outer cylinder 4. The outer diameter of the moving ring 15 is larger than the diameter of the through hole 7, so that the moving ring 15 is prevented from passing through the through hole 7, so that when the moving ring 15 contacts the bottom plate 6, the moving ring 15 is blocked from further moving downward, and an upward force is provided for the moving ring 15, so that the moving ring 15 and the outer cylinder 4 move relative to each other. The connecting piece is arranged in the outer cylinder 4, and the position of the connecting piece is close to the moving ring 15. The lower part of the connecting piece is connected to the inner cylinder 5, and the two sides of the connecting piece pass through the two sliding grooves 16 and are connected to the moving ring 15, so that the inner cylinder 5 can be driven to move by the movement of the moving ring 15. The lifting assembly is respectively connected to the top plate 1, The outer cylinder 4 is connected to drive the outer cylinder 4 to move up and down, so that the movable ring 15 contacts the bottom plate 6, and drives the inner cylinder 5 to move up and down in the outer cylinder 4, so that the first sampling port 11 overlaps and separates with the second sampling port 12, so that after the outer cylinder 4 enters the soil, the second sampling port 12 is opened to allow the soil to enter the inner cylinder 5, and after the sampling is completed, the second sampling port 12 is closed to take out the outer cylinder 4 from the soil, so that the soil at other depths will not enter the inner cylinder 5 during the process of the outer cylinder 4 entering and taking out the soil, thereby avoiding mixing of soils at different depths and ensuring the accuracy of the detection results.

[0029] like Figure 1 , Figure 2 As shown, the support member includes a plurality of support columns 2, which are vertically arranged between the top plate 1 and the bottom plate 6, and are evenly arranged along the edge of the bottom plate 6, and both ends of each support column 2 are connected to the top plate 1 and the bottom plate 6 respectively.

[0030] like Figure 2As shown, the connecting member includes a moving block 14, a transmission rod 18 and two connecting rods 17. The moving block 14 is arranged in the outer cylinder 4, and the moving block 14 is located close to the two slide grooves 16. The moving block 14 is slidably connected to the inner wall of the outer cylinder 4, so that the moving block 14 can move up and down in the outer cylinder 4. The transmission rod 18 is vertically arranged between the moving block 14 and the inner cylinder 5. The two ends of the transmission rod 18 are respectively connected to the moving block 14 and the inner cylinder 5. The two connecting rods 17 are respectively arranged horizontally in the two slide grooves 16. The two ends of each connecting rod 17 are respectively connected to the moving block 14 and the inner side of the moving ring 15. When the moving ring 15 moves up and down along the outer cylinder 4, the moving block 14 is driven to move up and down by the two connecting rods 17, and the moving block 14 drives the inner cylinder 5 to move up and down along the inner wall of the outer cylinder 4 through the transmission rod 18.

[0031] like Figure 2 As shown, a limit plate is horizontally arranged inside the outer cylinder 4 between the inner cylinder 5 and the moving block 14, and a limit hole is provided in the limit plate near the transmission rod 18. The transmission rod 18 passes through the limit hole, and the limit plate makes the transmission rod 18 move up and down more stably.

[0032] like Figure 1 , Figure 2 , Figure 3 As shown, the lifting assembly includes an electric telescopic rod 8 and a first elastic member 20. The electric telescopic rod 8 is vertically arranged between the top plate 1 and the outer tube 4. The upper end of the electric telescopic rod 8 is connected to the top plate 1, and the lower end of the electric telescopic rod 8 is connected to the outer tube 4 through the box body 3. The outer tube 4 is driven to move up and down by the extension and retraction of the electric telescopic rod 8. The first elastic member 20 is vertically arranged in the outer tube 4 and is located on the upper part of the moving block 14. The two ends of the first elastic member 20 are respectively connected to the top of the outer tube 4 and the moving block 14. The first elastic member 20 facilitates the inner tube 5 to reset after moving upward.

[0033] like Figure 1 As shown, a motor 34 is provided in the box body 3, and the output end of the motor 34 passes through the lower part of the box body 3 and is connected to the top of the outer cylinder 4. A drill bit 35 is provided at the lower end of the outer cylinder 4, and the drill bit 35 is detachably connected to the outer cylinder 4. The upper part of the inner cylinder 5 is detachably connected to the lower end of the transmission rod 18, so that after the drill bit 35 is removed, the inner cylinder 5 can be taken out from the outer cylinder 4, and the motor 34 is started to drive the outer cylinder 4 to rotate, and the outer cylinder 4 drives the drill bit 35 to rotate, and a hole is drilled in the ground through the drill bit 35, so that the outer cylinder 4 enters the soil.

[0034] like Figure 1 As shown, each support column 2 is provided with a sleeve near the box body 3, the sleeve is slidably connected to the corresponding support column 2, and the sleeve is connected to the box body 3 through a horizontally arranged fixing rod, which is convenient for limiting the position of the box body 3 and making the up and down movement of the box body 3 more stable.

[0035] like Figure 4As shown, a baffle 13 is obliquely arranged in the first sampling port 11, the lower end of the baffle 13 is close to the inner cylinder 5 and is rotatably connected to the first sampling port 11, the upper end of the baffle 13 is close to the outside of the first sampling port 11, and the lower part of the baffle 13 is connected to the inside of the first sampling port 11 through an obliquely arranged second elastic member 21, and an opening and closing component is arranged in the first sampling port 11, and the opening and closing component is respectively connected to the baffle 13 and the moving block 14, and the opening and closing component is used to drive the baffle 13 to swing up and down through the up and down movement of the moving block 14, so as to open and close the first sampling port 11, and the baffle 13 is used to prevent the outer cylinder 4 from moving downward in the soil so that soil at other depths will not enter the first sampling port 11, thereby preventing the first sampling port 11 from mixing into the second sampling port 12 after the second sampling port 12 is opened, thereby affecting the accuracy of the detection result.

[0036] like Figure 2 , Figure 3 As shown, the opening and closing assembly includes a first plunger hydraulic cylinder 23, a liquid storage chamber 25, two installation chambers 27 and a pressing member. The first plunger hydraulic cylinder 23 is vertically arranged on the upper part of the moving block 14 and is located in the first elastic member 20, that is, the first elastic member 20 is sleeved on the first plunger hydraulic cylinder 23, and the two ends of the first plunger hydraulic cylinder 23 are respectively connected to the moving block 14 and the top of the outer cylinder 4. The liquid storage chamber 25 is opened inside the top of the outer cylinder 4, and hydraulic oil is arranged inside the liquid storage chamber 25. The liquid storage chamber 25 is communicated with the first plunger hydraulic cylinder 23. A first connecting pipe is vertically arranged between the liquid storage chamber 25 and the first plunger hydraulic cylinder 23, and the two ends of the first connecting pipe are respectively communicated with the liquid storage chamber 25 and the first plunger hydraulic cylinder 23. The two installation chambers 27 are symmetrically opened inside the side of the outer cylinder 4 and are located below the liquid storage chamber 25. The first sampling port 11 is located between the two installation chambers. A second plunger hydraulic cylinder 24 is vertically arranged in each installation cavity 27, the upper end of each second plunger hydraulic cylinder 24 is connected to the top of the installation cavity 27, the second plunger hydraulic cylinder 24 is connected to the liquid storage cavity 25, and a second connecting pipe is vertically arranged between the second plunger hydraulic cylinder 24 and the liquid storage cavity 25, and the two ends of the second connecting pipe are respectively connected to the second plunger hydraulic cylinder 24 and the liquid storage cavity 25, and the pressure inside the first plunger hydraulic cylinder 23 and the two second plunger hydraulic cylinders 24 is transmitted through hydraulic oil, so that the contraction of the first plunger hydraulic cylinder 23 can drive the extension of the two second plunger hydraulic cylinders 24, and the lower pressure piece is respectively connected to the two second plunger hydraulic cylinders 24 and the baffle 13, and is used to drive the baffle 13 to swing up and down through the extension and contraction of the two second plunger hydraulic cylinders 24, thereby opening and closing the first sampling port 11.

[0037] like Figure 4 , Figure 5 , Figure 6As shown, the pressing member includes a sliding cavity 28, two guide rods 30, an arc plate 31 and a pressing rod 33. The sliding cavity 28 is opened inside the side of the outer cylinder 4. The sliding cavity 28 is located between the two mounting cavities 27 and the first sampling port 11. The sliding cavity 28 is connected to each mounting cavity 27 through a vertically arranged guide hole 29, that is, the guide hole 29 is opened inside the side of the outer cylinder 4. The two guide rods 30 are respectively arranged in the two guide holes 29. Each guide rod 30 can move up and down in the corresponding guide hole 29. The upper end of each guide rod 30 is connected to the lower end of the corresponding second plunger hydraulic cylinder 24. The arc plate 31 is arranged in the sliding cavity 28. The arc plate 31 is slidably connected to the inner wall of the sliding cavity 28. The arc plate 31 can slide freely up and down along the inside of the sliding cavity 28. The sliding cavity 28 is along the periphery of the outer cylinder 4. The sliding cavity 28 is arranged in an arc shape, so that the sliding cavity 28 is also arc-shaped, and the lower end of each guide rod 30 is connected to the arc plate 31. The pressure rod 33 is vertically arranged at the lower part of the arc plate 31 and is located close to the first sampling port 11, that is, the pressure rod 33 is located between the two guide rods 30, and the upper end of the pressure rod 33 is connected to the arc plate 31. The lower end of the pressure rod 33 passes through the bottom of the sliding cavity 28 and is located in the first sampling port 11 and contacts with the upper surface of the baffle 13, that is, the sliding cavity 28 is connected to the first sampling port 11 through the connecting hole, and the pressure rod 33 is located in the connecting hole. The pressure rod 33 can move up and down along the connecting hole, and the pressure rod 33 moves downward, driving the baffle 13 to swing downward to open the first sampling port 11. When the pressure rod 33 moves upward, the elastic force of the first elastic member 20 drives the baffle 13 to move upward to close the first sampling port 11.

[0038] like Figure 4 As shown, a third elastic member 22 is sleeved on the pressure rod 33 at a position inside the sliding cavity 28, and both ends of the third elastic member 22 are slidingly connected to the arc plate 31 and the bottom of the sliding cavity 28 respectively, so that the arc plate 31 can be reset after moving downward through the third elastic member 22.

[0039] like Figure 4 As shown, a first roller 26 is provided at the lower end of the pressure rod 33, and the first roller 26 contacts the upper part of the baffle 13. The first roller 26 reduces the friction between the lower end of the pressure rod 33 and the baffle 13, so that the lower end of the pressure rod 33 of the baffle 13 slides more smoothly along the upper surface of the baffle 13, avoiding the movement of the pressure rod 33 being affected by soil sticking to the baffle 13.

[0040] like Figure 1 , Figure 3 As shown, a plurality of second rollers 32 are evenly arranged along the edge of the lower portion of the moving ring 15 to reduce the friction between the moving ring 15 and the bottom plate 6, so that the rotation of the moving ring 15 is more stable.

[0041] like Figure 1 , Figure 3As shown, a plurality of partitions 9 are fixedly arranged horizontally in sequence from top to bottom inside the inner cylinder 5, and the plurality of partitions 9 divide the interior of the inner cylinder 5 into a plurality of sampling chambers 10 in sequence from top to bottom, and each sampling chamber 10 corresponds to a second sampling port 12, so that a first sampling port 11 is provided on the side of the outer cylinder 4 above each second sampling port 12, thereby facilitating the sampling of soils at different depths at the same time, and at the same time, each second sampling port 12 corresponds to a sliding chamber 28, and two guide rods 30 pass through the arc plate 31 and are fixedly connected to the arc plate 31, and two adjacent sliding chambers 28 are connected through sliding holes, and each guide rod 30 passes through the corresponding sliding hole, so that the baffle 13 in each first sampling port 11 can be driven to move up and down by the two guide rods 30, thereby opening and closing the first sampling port 11, and then when sampling soils at different depths, soils at other depths can be prevented from mixing therein.

[0042] Working principle: When in use, the device is moved to the position where sampling is required, so that the bottom plate 6 contacts the ground, and then the motor 34 is started, the motor 34 drives the outer tube 4 to rotate, and the outer tube 4 drives the drill bit 35 to rotate, and at the same time the electric telescopic rod 8 is started, and the electric telescopic rod 8 moves downward through the outer tube 4 of the box body 3, and the outer tube 4 drives the drill bit 35 to rotate and moves downward through the through hole 7 to drill a hole in the ground, driving the outer tube 4 to enter the soil, and the moving ring 15 moves downward with the outer tube 4 until it contacts the bottom plate 6. When the moving ring 15 contacts the bottom plate 6, it blocks the movement of the outer tube 4. The moving ring 15 moves further downward, providing an upward force for the moving ring 15, so that the moving ring 15 moves relative to the outer tube 4, so that the moving ring 15 moves upward relative to the outer tube 4, and the moving ring 15 drives the moving block 14 to move upward through the two connecting rods 17, and the moving block 14 drives the inner tube 5 to move upward along the inner wall of the outer tube 4 through the transmission rod 18, so that the second sampling port 12 on each sampling cavity 10 can overlap with the first sampling port 11 after moving upward. At this time, the electric telescopic rod 8 is stopped, so that the outer tube 4 does not move further downward.

[0043] At the same time, when the moving block 14 moves upward, the first plunger hydraulic cylinder 23 is driven to contract, the internal pressure of the first plunger hydraulic cylinder 23 increases, and the pressure is transmitted to the two second plunger hydraulic cylinders 24 through the hydraulic oil. The two second plunger hydraulic cylinders 24 extend and drive the two guide rods 30 to move downward. The two guide rods 30 drive each arc plate 31 to move downward along the corresponding sliding cavity 28. Each arc plate 31 drives the corresponding pressure rod 33 to move downward. The lower end of the pressure rod 33 squeezes the baffle 13, driving the baffle 13 to swing downward, so that the baffle 13 extends out of the corresponding first sampling port 11. Each baffle 13 As the outer cylinder 4 rotates, the soil at the corresponding depth in the borehole is scraped off, so that the soil enters the first sampling port 11 and the second sampling port 12 in sequence along the baffle 13 and then enters the corresponding sampling cavity 10. After the soil collected in each sampling cavity 10 meets the detection requirements, the motor 34 is turned off, the outer cylinder 4 stops rotating, and then the electric telescopic rod 8 is started. The electric telescopic rod 8 drives the outer cylinder 4 to move upward, and the inner cylinder 5 moves relatively downward under the action of the first elastic member 20, so that each second sampling port 12 is closed. At the same time, each baffle 13 is reset under the action of the second elastic member 21, and the first sampling port 11 is closed to complete the sampling.

[0044] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A soil sampling device for environmental monitoring, comprising a top plate (1) and a bottom plate (6) arranged relatively horizontally from top to bottom, the bottom plate (6) and the top plate (1) being connected via a support member, a through hole (7) being provided on the bottom plate (6), characterized in that: Also includes: The outer cylinder (4) is vertically arranged between the bottom plate (6) and the top plate (1), and the lower end is close to the through hole (7). At least one first sampling port (11) is provided on the side of the outer cylinder (4). Two slide grooves (16) are vertically symmetrically provided on the side of the outer cylinder (4) at a position above the first sampling port (11); The inner cylinder (5) is arranged inside the outer cylinder (4) and is slidably connected to the inner wall of the outer cylinder (4); a second sampling port (12) is provided on the side of the inner cylinder (5) at a position below the first sampling port (11); A movable ring (15) is sleeved on the outer cylinder (4) and is located close to the two slide grooves (16); the outer diameter of the movable ring (15) is greater than the diameter of the through hole (7); A connecting piece is arranged in the outer cylinder (4) and is located close to the moving ring (15), the lower part of the connecting piece is connected to the inner cylinder (5), and the two sides of the connecting piece pass through two sliding grooves (16) to be connected to the moving ring (15); The lifting assembly is connected to the top plate (1) and the outer cylinder (4) respectively, and is used to drive the outer cylinder (4) to move up and down, so that the moving ring (15) contacts the bottom plate (6), and drives the inner cylinder (5) to move up and down on the outer cylinder (4), so that the first sampling port (11) and the second sampling port (12) overlap and separate.

2. The soil sampling device for environmental monitoring according to claim 1, characterized in that: The connecting member comprises: a moving block (14) arranged in the outer cylinder (4) and located close to two slide grooves (16); a transmission rod (18) arranged vertically between the moving block (14) and the inner cylinder (5), with two ends of the transmission rod (18) respectively connected to the moving block (14) and the inner cylinder (5); and two connecting rods (17) respectively arranged horizontally in the two slide grooves (16), with two ends of each connecting rod (17) respectively connected to the moving block (14) and the inner side surface of the moving ring (15).

3. The soil sampling device for environmental monitoring according to claim 2, characterized in that: The lifting assembly comprises: an electric telescopic rod (8) vertically arranged between a top plate (1) and an outer cylinder (4), the upper end of the electric telescopic rod (8) being connected to the top plate (1), and the lower end of the electric telescopic rod (8) being connected to the outer cylinder (4) via a box body (3); and a first elastic member (20) vertically arranged in the outer cylinder (4) and located above the moving block (14), the two ends of the first elastic member (20) being respectively connected to the top of the outer cylinder (4) and the moving block (14).

4. The soil sampling device for environmental monitoring according to claim 3, characterized in that: A baffle (13) is obliquely arranged inside the first sampling port (11); the lower end of the baffle (13) is close to the inner cylinder (5) and is rotatably connected to the first sampling port (11); the upper end of the baffle (13) is close to the outside of the first sampling port (11); the lower part of the baffle (13) is connected to the inside of the first sampling port (11) via an obliquely arranged second elastic member (21); an opening and closing component is arranged inside the first sampling port (11); the opening and closing component is respectively connected to the baffle (13) and the moving block (14); the opening and closing component is used to drive the baffle (13) to swing up and down by the up and down movement of the moving block (14), thereby opening and closing the first sampling port (11).

5. The soil sampling device for environmental monitoring according to claim 4, characterized in that: The opening and closing assembly comprises: a first plunger-type hydraulic cylinder (23), which is vertically arranged on the upper part of the moving block (14) and located in the first elastic member (20), and the two ends of the first plunger-type hydraulic cylinder (23) are respectively connected to the moving block (14) and the top of the outer cylinder (4); a liquid storage chamber (25), which is opened inside the top of the outer cylinder (4), and the liquid storage chamber (25) is connected to the first plunger-type hydraulic cylinder (23); and two installation chambers (27), which are symmetrically opened inside the side of the outer cylinder (4) and located below the liquid storage chamber (25). The first sampling port (11) is located between the two installation cavities (27); a second plunger-type hydraulic cylinder (24) is vertically arranged in each installation cavity (27); the upper end of each second plunger-type hydraulic cylinder (24) is connected to the top of the installation cavity (27); and the second plunger-type hydraulic cylinder (24) is in communication with the liquid storage cavity (25); a lower pressing member is respectively connected to the two second plunger-type hydraulic cylinders (24) and the baffle (13), and is used to drive the baffle (13) to swing up and down through the extension and contraction of the two second plunger-type hydraulic cylinders (24).

6. The soil sampling device for environmental monitoring according to claim 5, characterized in that: The pressing member comprises: a sliding cavity (28) which is opened inside the side of the outer cylinder (4) and is located between the two mounting cavities (27) and the first sampling port (11); the sliding cavity (28) is connected to each mounting cavity (27) via a vertically arranged guide hole (29); two guide rods (30) which are respectively arranged in the two guide holes (29); the upper end of each guide rod (30) is connected to the lower end of the corresponding second plunger hydraulic cylinder (24); and an arc plate (31). The guide rods (30) are arranged in the sliding cavity (28) and are slidably connected to the inner wall of the sliding cavity (28). The lower end of each guide rod (30) is connected to the arc plate (31). The pressure rod (33) is vertically arranged at the lower part of the arc plate (31) and is located close to the first sampling port (11). The upper end of the pressure rod (33) is connected to the arc plate (31). The lower end of the pressure rod (33) passes through the bottom of the sliding cavity (28) and is located in the first sampling port (11) and contacts the upper surface of the baffle (13).

7. The soil sampling device for environmental monitoring according to claim 6, characterized in that: A third elastic member (22) is sleeved on the pressure rod (33) at a position inside the sliding cavity (28), and two ends of the third elastic member (22) are respectively slidably connected to the arc plate (31) and the bottom of the sliding cavity (28).

8. The soil sampling device for environmental monitoring according to claim 6, characterized in that: A first roller (26) is provided at the lower end of the pressure rod (33), and the first roller (26) is in contact with the upper part of the baffle (13).

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