Coastal wetland ecological sampling box

Abstract

The invention discloses a coastal wetland ecological sampling box, and belongs to the field of wetland sampling. A coastal wetland ecological sampling box comprises a box body and further comprises a sinking unit arranged in the box body, a sampling unit is arranged on the sinking unit, the sinking unit can drive the sampling unit to move in the vertical direction, and the sampling unit is used for sampling a coastal wetland; the sampling unit comprises an adjusting mechanism and a sampling control mechanism, the adjusting mechanism is used for adjusting the sampling depth of the coastal wetland, and the sampling control mechanism is used for quantitatively sampling the coastal wetland and adjusting the moving direction of the sampling unit; the problems that the descending depth and the sampling amount of wetland sampling are inconvenient to control, the sampling effect is poor, the accuracy of sample detection data is poor, and the sampling efficiency is low can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of wetland sampling, in particular to a coastal wetland ecological sampling box. Background Art

[0002] Coastal wetlands refer to the interlaced transition zone between terrestrial ecosystems and marine ecosystems, which have the value of regulating flow, preventing seawater intrusion, replenishing groundwater or sedimentation of nutrients from groundwater, regulating climate, maintaining biodiversity and ecological functions, protecting coasts, tourism development, education and scientific research. In order to understand the types of wetlands, evaluate the biodiversity and ecosystem service functions of wetlands, and grasp the changes in the ecological environment of wetlands, it is usually necessary to conduct ecological sampling of wetlands from time to time in order to formulate wetland protection and restoration measures.

[0003] At present, sampling of coastal wetlands is mostly for sediments on the surface of the wetlands. When sampling deep sediments, it is difficult to control the descent depth of the sampling equipment and the sampling amount of sediments, and a good sampling effect cannot be achieved. In addition, it is easy to mix sediments at different depths, requiring multiple samplings, which not only affects the accuracy of the test data, but also affects the efficiency of sampling. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art of wetland sampling, such as the difficulty in controlling the descent depth and sampling amount, poor sampling effect, poor accuracy of sample detection data, and low sampling efficiency, and to propose a coastal wetland ecological sampling box.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A coastal wetland ecological sampling box comprises a box body, and also comprises: a sinking unit arranged in the box body, a sampling unit is arranged on the sinking unit, the sinking unit can drive the sampling unit to move in a vertical direction, and the sampling unit is used to sample the coastal wetland; the sampling unit comprises an adjusting mechanism and a sampling control mechanism, the adjusting mechanism is used to adjust the sampling depth of the coastal wetland, the sampling control mechanism is used to perform quantitative sampling of the coastal wetland and adjust the moving direction of the sampling unit, wherein a delay mechanism is arranged between the adjusting mechanism and the sampling control mechanism, which is used to delay the movement time of the adjusting mechanism to an initial position.

[0007] In order to facilitate the adjustment of the height of the sampling cylinder and ensure stability during height adjustment, preferably, the sinking unit includes a screw rod symmetrically fixedly connected to the inside of the box body, a threaded column is threadedly connected to the screw rod, and both ends of the threaded column are fixedly connected to limit bars, one of the limit bars is fixedly connected to a driven wheel on the side away from the threaded column, a mounting block is rotatably connected to the threaded column, and a cross bar is fixedly connected between the mounting blocks, wherein the mounting block is located between the two groups of limit bars, and the limit bar is in contact with the outer wall of the mounting block.

[0008] In order to facilitate the control of the sampling barrel to sample the sediment within the specified depth range, the adjustment mechanism further includes a fixed plate fixedly connected to the cross bar, a motor is fixedly connected to the fixed plate, the output end of the motor is fixedly connected to the sampling barrel, an adjusting rod is symmetrically fixedly connected to the outer wall of the sampling barrel, an end of the adjusting rod away from the motor is fixedly connected to a first slip ring, a side of the first slip ring away from the adjusting rod is fixedly connected to a compression cylinder, an end of the compression cylinder away from the adjusting rod is fixedly connected to a second slip ring, a first spring is fixedly connected between the first slip ring and the second slip ring, wherein the first slip ring and the second slip ring are both sleeved on the sampling barrel, and the first spring is sleeved on the compression cylinder.

[0009] In order to prevent sediments of different depths from mixing together when the sampling barrel descends, it further includes two groups of baffles rotatably connected to the inner wall of the sampling barrel near the open end, and multiple groups of slide grooves are symmetrically opened on the side of the sampling barrel near the baffle, and the inside of the slide groove is fixedly connected with a limit block, and a second spring is fixedly connected between the limit block and the inner wall of the slide groove, wherein the baffles are rotatably connected between the ends close to each other, and the baffles are in contact with the inner wall of the sampling barrel, the limit blocks are located on both sides of the baffle, and a guide groove is opened on the limit block away from the open end of the sampling barrel, and the guide groove is inclined on the side close to the second spring.

[0010] In order to enable sampling when the sampling barrel reaches a specified depth range, further, a connecting chamber is opened on the side of the side wall of the sampling barrel close to the slide groove, a connecting pipe is connected between the connecting chamber and the outlet end of the compression cylinder, a third spring is fixedly connected to the inside of the connecting chamber, and an end of the third spring close to the slide groove is fixedly connected to a guide block slidably connected to the connecting chamber, wherein the connecting chamber is connected to the slide groove away from the side of the sampling barrel, the end of the guide block away from the third spring is inclined, and the guide block matches the guide groove.

[0011] In order to facilitate the storage of sediment and monitoring the amount of sediment in the sampling cylinder, the sampling control mechanism further includes a fixed rod fixedly connected in the sampling cylinder, a piston is slidably connected to the fixed rod, and the piston is tightly fitted to the inner wall of the sampling cylinder.

[0012] In order to ensure the stability of the amount of sediment in the sampling barrel, the sampling control mechanism further includes a plurality of connected cylinders fixedly connected to the inner wall of the sampling barrel near the motor side, a driving wheel is rotatably connected to the output end of the motor, a positioning rod is slidably connected to the inside of the driving wheel, a slot matching the positioning rod is provided on the side of the fixed plate near the driving wheel, a control switch is provided inside the slot, wherein, in the initial state, the positioning rod at least partially extends into the sampling barrel, and the output end of the connected cylinder is in contact with the positioning rod, and the control switch is electrically connected to the motor.

[0013] In order to reduce energy consumption and improve the accuracy of the sampling tube's descent and the stability of the sampling amount, a belt is further arranged between the driving wheel and the driven wheel to drive the driven wheel and the threaded column to rotate synchronously with the driving wheel.

[0014] In order to prevent the limit block from affecting the rotation of the baffle, the delay mechanism further includes a connecting groove opened in the side wall of the sampling barrel, the connecting groove is connected to the sampling barrel and the connecting cavity, and the connecting groove at least partially passes through the connecting cavity, and the interior of the connecting groove is fixedly connected to a fourth spring, and the fourth spring is fixedly connected to one end close to the connecting cavity with a sealing block, and the sealing block is tightly fitted to the inner wall of the connecting groove.

[0015] In order to facilitate the discharge of sediment in the sampling tube and control the sampling speed, it further includes an elastic sheet fixedly connected to one side of the two groups of baffles close to the open end of the sampling tube, and the elastic sheet is arranged in an arc shape.

[0016] Compared with the prior art, the present invention provides a coastal wetland ecological sampling box, which has the following beneficial effects:

[0017] 1. The coastal wetland ecological sampling box can adjust the descent height of the sampling tube through the adjustment mechanism, and start sampling the wetland sediment when the sampling tube reaches the specified depth range through the sampling control mechanism. It not only improves the intelligence of the equipment, but also ensures the accuracy of the sampling depth, improves the effect of wetland sediment sampling, and prevents sediments of different depths from mixing together, ensuring the accuracy of sample detection data.

[0018] 2. The coastal wetland ecological sampling box opens the sampling cylinder through the adjustment mechanism to allow the sediment to enter the sampling cylinder. As the sediment in the sampling cylinder increases, the sampling control mechanism will be compressed. When the sampling reaches a certain amount, the sinking unit will stop rotating to control the sampling amount of the sediment. At the same time, the sampling unit is controlled to rotate in the opposite direction to take the sampling cylinder out of the wetland, which greatly improves the sampling efficiency of the wetland.

[0019] 3. The coastal wetland ecological sampling box can delay the time for the limit block to move to the initial position through the delay mechanism, so as to avoid the limit block affecting the rotation of the baffle to the initial position, thereby preventing the leakage of sediment in the sampling tube and improving the stability of sampling.

[0020] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present invention can overcome the problems of difficult control of the descent depth and sampling amount of wetland sampling, poor sampling effect, poor accuracy of sample detection data, and low sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a coastal wetland ecological sampling box proposed by the present invention.

[0022] Figure 2 This is a schematic diagram of the internal structure of a box in a coastal wetland ecological sampling box proposed by the present invention.

[0023] Figure 3 A schematic diagram of the partial structure of a coastal wetland ecological sampling box proposed by the present invention Figure 1 .

[0024] Figure 4 A schematic diagram of the partial structure of a coastal wetland ecological sampling box proposed by the present invention Figure 2 .

[0025] Figure 5 This is a schematic diagram of the partial cross-sectional structure of a coastal wetland ecological sampling box proposed by the present invention.

[0026] Figure 6 This is a partial structural schematic diagram of a driving wheel and a sampling tube in a coastal wetland ecological sampling box proposed by the present invention.

[0027] Figure 7 This is a structural schematic diagram of a baffle and an elastic sheet in a coastal wetland ecological sampling box proposed by the present invention.

[0028] Figure 8 The present invention is a schematic structural diagram of a threaded column, a driven wheel, a limit bar and a mounting block in a coastal wetland ecological sampling box proposed by the present invention.

[0029] Fig. 9 A coastal wetland ecological sampling box proposed by the present invention Figure 5 Schematic diagram of the structure of part A in .

[0030] Fig.10 A coastal wetland ecological sampling box proposed by the present invention Figure 5 Schematic diagram of the structure of part B.

[0031] In the figure: 1. box body; 2. floating plate; 3. screw; 4. threaded column; 5. limit strip; 6. driven wheel; 7. mounting block; 8. cross bar; 9. fixed plate; 10. motor; 11. driving wheel; 12. belt; 13. sampling tube; 14. adjusting rod; 15. first slip ring; 16. compression cylinder; 17. first spring; 18. second slip ring; 19. connecting pipe; 20. connecting cavity; 21. baffle; 22. slide groove; 23. limit block; 24. second spring; 25. guide groove; 26. third spring; 27. guide block; 28. fixed rod; 29. ​​piston; 30. connecting cylinder; 31. positioning rod; 32. slot; 33. control switch; 34. connecting groove; 35. fourth spring; 36. sealing block; 37. elastic sheet. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] Example:

[0035] Reference Figure 1-Figure 10 , a coastal wetland ecological sampling box, including a box body 1, a hole larger than the size of a sampling tube 13 is opened at the bottom of the box body 1, and a handle, an observation port and a control panel are also provided on the box body 1. This is a conventional means in the prior art, so it is not described in detail. The control panel is electrically connected to the motor 10 and the adjusting rod 14. A floating plate 2 is also provided at the bottom of the outer wall of the box body 1. The end of the floating plate 2 away from the box body 1 is inclined, so that the box body 1 can easily slide on the wetland surface. It also includes: a sinking unit arranged in the box body 1, a sampling unit is arranged on the sinking unit, and the sinking unit can drive the sampling unit to move in a vertical direction, and the sampling unit is used to sample the coastal wetland; the sampling unit includes an adjusting mechanism and a sampling control mechanism, the adjusting mechanism is used to adjust the sampling depth of the coastal wetland, and the sampling control mechanism is used to perform quantitative sampling on the coastal wetland and adjust the moving direction of the sampling unit, wherein a delay mechanism is provided between the adjusting mechanism and the sampling control mechanism, which is used to delay the movement time of the adjusting mechanism to the initial position.

[0036] Reference Figure 2 , Figure 3 and Figure 8 The sinking unit includes a screw rod 3 symmetrically fixedly connected to the inside of the box body 1, a threaded column 4 is threadedly connected to the screw rod 3, both ends of the threaded column 4 are fixedly connected to limit strips 5, one of the limit strips 5 is fixedly connected to a driven wheel 6 on the side away from the threaded column 4, a mounting block 7 is rotatably connected to the threaded column 4, and a cross bar 8 is fixedly connected between the mounting blocks 7, wherein the mounting block 7 is located between the two groups of limit strips 5, and the limit strip 5 is in contact with the outer side wall of the mounting block 7.

[0037] The thread direction on the surface of the screw rod 3 is not limited here, as long as the thread direction on the two groups of screw rods 3 can be set symmetrically, that is, when the two groups of screw rods 3 rotate in the same direction, the movement direction of the threaded column 4 is the same, wherein a hole matching the threaded column 4 is opened on the mounting block 7, and the size of the limit strip 5 is larger than the size of the threaded column 4, that is, the limit strip 5 is used to prevent relative movement between the threaded column 4 and the mounting block 7.

[0038] Reference Figure 2-Figure 5 The adjustment mechanism includes a fixed plate 9 fixedly connected to the cross bar 8, a motor 10 is fixedly connected to the fixed plate 9, a sampling tube 13 is fixedly connected to the output end of the motor 10, an adjusting rod 14 is symmetrically fixedly connected to the outer wall of the sampling tube 13, an end of the adjusting rod 14 away from the motor 10 is fixedly connected to a first slip ring 15, a side of the first slip ring 15 away from the adjusting rod 14 is fixedly connected to a compression cylinder 16, an end of the compression cylinder 16 away from the adjusting rod 14 is fixedly connected to a second slip ring 18, a first spring 17 is fixedly connected between the first slip ring 15 and the second slip ring 18, wherein the first slip ring 15 and the second slip ring 18 are both sleeved on the sampling tube 13, and the first spring 17 is sleeved on the compression cylinder 16.

[0039] By adjusting the length of the adjustment rod 14, the positions of the first slip ring 15 and the second slip ring 18 on the sampling tube 13 can be adjusted, wherein the size of the second slip ring 18 is larger than the size of the hole at the bottom of the box body 1, so that when the sampling tube 13 moves downward, the second slip ring 18 can block the hole on the box body 1 to prevent sediments avoided by the wetland from entering the box body 1.

[0040] Reference Figure 4 , Figure 5 , Figure 7 and Fig. 9, also includes two groups of baffles 21 rotatably connected to the inner wall of the sampling barrel 13 near the open end, and also includes an elastic sheet 37 fixedly connected to the two groups of baffles 21 near the open end of the sampling barrel 13. The elastic sheet 37 is arranged in an arc shape, and a plurality of groups of slide grooves 22 are symmetrically provided on the side of the sampling barrel 13 near the baffle 21. The inside of the slide groove 22 is fixedly connected with a limiting block 23, and a second spring 24 is fixedly connected between the limiting block 23 and the inner wall of the slide groove 22, wherein the ends of the baffles 21 close to each other are rotatably connected, and the baffles 21 are in contact with the inner wall of the sampling barrel 13, and the limiting blocks 23 are located on both sides of the baffle 21, and a guide groove 25 is provided on the limiting block 23 away from the open end of the sampling barrel 13, and the side of the guide groove 25 close to the second spring 24 is inclined.

[0041] It needs to be explained that when the sampling barrel 13 moves downward on the wetland, the thrust of the sediment on the baffle 21 is greater than the elastic force of the elastic sheet 37, and the two sets of baffles 21 rotate and fit tightly to prevent the sediment from being discharged from the gap between the baffles 21. Initially, the limit blocks 23 on both sides can limit the baffle 21 to prevent sediments of different depths from entering the sampling barrel 13 during the descent of the sampling barrel 13.

[0042] Reference Figure 5 and Fig. 9 A connecting chamber 20 is provided in the side wall of the sampling tube 13 near the slide groove 22, and a connecting pipe 19 is connected between the connecting chamber 20 and the outlet end of the compression cylinder 16. A third spring 26 is fixedly connected to the inside of the connecting chamber 20, and a guide block 27 slidably connected to the connecting chamber 20 is fixedly connected to one end of the third spring 26 near the slide groove 22, wherein the connecting chamber 20 is connected to the slide groove 22 away from the side of the sampling tube 13, and the end of the guide block 27 away from the third spring 26 is inclined, and the guide block 27 matches the guide groove 25.

[0043] The gas compressed by the compression cylinder 16 will enter the connecting chamber 20, increasing the air pressure in the connecting chamber 20, driving the guide block 27 to move toward the guide groove 25, and driving the limit block 23 to move into the slide groove 22, so as to release the limit on the side of the baffle 21 close to the sampling tube 13. It should be explained that the connecting tube 19 passes through the first slip ring 15 and is located above the compression cylinder 16. When the sampling tube 13 descends, the connecting tube 19 will not affect the sampling of the sampling tube 13.

[0044] Reference Figure 5 The sampling control mechanism includes a fixed rod 28 fixedly connected to the sampling tube 13 , and a piston 29 is slidably connected to the fixed rod 28 . The piston 29 is tightly fitted to the inner wall of the sampling tube 13 .

[0045] The piston 29 and the space above the sampling cylinder 13 are in a sealed state. During the movement of the piston 29, the air pressure between the piston 29 and the sampling cylinder 13 will change, and the more sediment in the sampling cylinder 13, the greater the air pressure. The fixed rod 28 can also adopt a retractable structure to facilitate adjustment of the initial position of the piston 29, but a venting part needs to be provided on the fixed rod 28 to ensure that the air pressure between the piston 29 and the sampling cylinder 13 is stable when adjusting the position of the piston 29. At this time, the sampling amount of the sampling cylinder 13 can be adjusted by adjusting the initial position of the piston 29.

[0046] Reference Figure 5 and Fig.10 The sampling control mechanism also includes a plurality of connected air cylinders 30 fixedly connected to the inner wall of the sampling tube 13 near the motor 10. The output end of the motor 10 is rotatably connected to the driving wheel 11. The interior of the driving wheel 11 is slidably connected to a positioning rod 31. A card slot 32 matching the positioning rod 31 is provided on the side of the fixed plate 9 near the driving wheel 11. A control switch 33 is provided inside the card slot 32. In the initial state, the positioning rod 31 at least partially extends into the sampling tube 13, and the output end of the connected air cylinder 30 is in contact with the positioning rod 31. The control switch 33 is electrically connected to the motor 10.

[0047] The connecting cylinder 30 at least partially extends into the sampling tube 13, and the air pressure in the connecting cylinder 30 is the same as the air pressure in the sampling tube 13. When the control switch 33 is triggered, the motor 10 is controlled to rotate in the opposite direction. This is a conventional method in the prior art, so it is not elaborated here. What needs to be explained is that when the positioning rod 31 is disengaged from the sampling tube 13, it just moves into the slot 32. The number of positioning rods 31 and slots 32 is not limited here. As long as the driving wheel 11 can be positioned, if the positioning rod 31 does not correspond to the slot 32 when it moves, when the driving wheel 11 drives the positioning rod 31 to rotate to the slot 32, the positioning rod 31 will enter the slot 32.

[0048] Reference Figure 2-Figure 3 A belt 12 is arranged between the driving wheel 11 and the driven wheel 6 to drive the driven wheel 6 and the threaded column 4 to rotate synchronously with the driving wheel 11.

[0049] Reference Fig.10 The delay mechanism includes a connecting groove 34 opened in the side wall of the sampling tube 13, the connecting groove 34 is connected to the sampling tube 13 and the connecting cavity 20, and the connecting groove 34 at least partially penetrates the connecting cavity 20, and a fourth spring 35 is fixedly connected to the inside of the connecting groove 34, and a sealing block 36 is fixedly connected to one end of the fourth spring 35 close to the connecting cavity 20, and the sealing block 36 is tightly fitted to the inner wall of the connecting groove 34.

[0050] It should be explained that the side of the sealing block 36 close to the connecting tube 19 is inclined, that is, the sealing block 36 will not affect the gas in the connecting tube 19 from entering the connecting chamber 20. When the sampling is completed, since there is still sediment near the baffle 21, the baffle 21 will not immediately rotate to the initial position. As the sampling tube 13 moves upward, the resistance to the baffle 21 will be reduced. Under the action of the elastic sheet 37 and the sediment in the sampling tube 13, the baffle 21 is driven to rotate to the initial position, and the piston 29 will move synchronously. When the baffle 21 moves to the initial position, the sealing block 36 is disengaged from the connecting chamber 20 to facilitate the backflow of the gas in the connecting chamber 20, so that the limit block 23 moves to the initial position under the action of the second spring 24 to limit the baffle 21.

[0051] In the present invention, when working, the box 1 is moved to a designated position of the wetland, and the box 1 can slide on the wetland under the action of the floating plate 2, and then the motor 10 is turned on. Initially, the positioning rod 31 is located in the sampling tube 13. Under the action of the positioning rod 31, the motor 10 drives the sampling tube 13 and the driving wheel 11 to rotate synchronously, and the driven wheel 6 and the threaded column 4 are driven to rotate through the belt 12, and the sampling tube 13 is moved downward during rotation through the screw 3; before this, the length of the adjusting rod 14 is adjusted to facilitate the sedimentation within the designated depth range. The sample is sampled. As the sampling tube 13 moves, the second slip ring 18 fits tightly with the bottom of the box 1 and compresses the compression cylinder 16. When the sampling tube 13 reaches the specified depth range, the compressed gas drives the guide block 27 to move through the connecting pipe 19 and the connecting cavity 20. Under the action of the guide groove 25, the limit block 23 is just received in the slide groove 22. When the sampling tube 13 moves downward, the baffle 21 rotates into the sampling tube 13 under the thrust of the sediment, and the sediment enters the sampling tube 13.

[0052] As the sediment in the sampling tube 13 increases, the piston 29 is driven to move along the inner wall of the sampling tube 13, and the gas between the piston 29 and the sampling tube 13 is compressed. When a certain amount is reached, the gas drives the positioning rod 31 to move into the card slot 32 through the connecting cylinder 30, and the sealing block 36 moves into the connecting chamber 20 to prevent the gas from flowing back and stop the rotation of the driving wheel 11. Then the positioning rod 31 triggers the control switch 33 to control the motor 10 to rotate in the opposite direction. In this process, the thrust on the baffle 21 is reduced. Under the action of the elastic sheet 37, the baffle 21 will rotate a certain distance to the initial position, and the piston 29 moves downward. The air pressure in the connecting cylinder 30 decreases, and the positioning rod 31 moves to the initial position, driving the driving wheel 11 to rotate in the opposite direction, thereby driving the sampling tube 13 to move upward. At this time, the thrust on the baffle 21 disappears, and the baffle 21 rotates to the initial position. At the same time, the air pressure between the piston 29 and the sampling tube 13 decreases, so that the sealing block 36 is separated from the connecting cavity 20, and the gas in the connecting cavity 20 flows back into the compression cylinder 16. At this time, the limit block 23 moves to the initial position to limit the baffle 21; after the sampling is completed, the sediment in the sampling tube 13 can be discharged by pressing the limit block 23 close to the open end of the sampling tube 13 inward.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coastal wetland ecological sampling box, comprising a box body (1), characterized in that: Also includes: A sinking unit is arranged in the box (1), a sampling unit is arranged on the sinking unit, the sinking unit can drive the sampling unit to move in a vertical direction, and the sampling unit is used to sample coastal wetlands; The sampling unit includes an adjustment mechanism and a sampling control mechanism, wherein the adjustment mechanism is used to adjust the sampling depth of the coastal wetland, and the sampling control mechanism is used to perform quantitative sampling on the coastal wetland and adjust the moving direction of the sampling unit. Wherein, a delay mechanism is arranged between the regulating mechanism and the sampling control mechanism, for delaying the movement time of the regulating mechanism to the initial position.

2. A coastal wetland ecological sampling box according to claim 1, characterized in that: The sinking unit comprises a screw rod (3) symmetrically fixedly connected to the inside of the box body (1); a threaded column (4) is threadedly connected to the screw rod (3); both ends of the threaded column (4) are fixedly connected to limit bars (5); a side of one of the limit bars (5) away from the threaded column (4) is fixedly connected to a driven wheel (6); a mounting block (7) is rotatably connected to the threaded column (4); and a cross bar (8) is fixedly connected between the mounting blocks (7). The mounting block (7) is located between two sets of limiting strips (5), and the limiting strips (5) are in contact with the outer side wall of the mounting block (7).

3. A coastal wetland ecological sampling box according to claim 2, characterized in that: The adjustment mechanism comprises a fixing plate (9) fixedly connected to the cross bar (8), a motor (10) fixedly connected to the fixing plate (9), a sampling tube (13) fixedly connected to the output end of the motor (10), an adjustment rod (14) symmetrically fixedly connected to the outer wall of the sampling tube (13), a first slip ring (15) fixedly connected to the end of the adjustment rod (14) away from the motor (10), a compression cylinder (16) fixedly connected to the side of the first slip ring (15) away from the adjustment rod (14), a second slip ring (18) fixedly connected to the end of the compression cylinder (16) away from the adjustment rod (14), a first spring (17) fixedly connected between the first slip ring (15) and the second slip ring (18), The first slip ring (15) and the second slip ring (18) are both sleeved on the sampling tube (13), and the first spring (17) is sleeved on the compression cylinder (16).

4. A coastal wetland ecological sampling box according to claim 3, characterized in that: The sampling tube (13) further comprises two groups of baffles (21) rotatably connected to the inner wall of the sampling tube (13) near the opening end, a plurality of groups of slide grooves (22) are symmetrically provided on the side of the sampling tube (13) near the baffle (21), a limit block (23) is fixedly connected inside the slide groove (22), a second spring (24) is fixedly connected between the limit block (23) and the inner wall of the slide groove (22), The baffles (21) are rotatably connected at their mutually adjacent ends, and the baffles (21) are in contact with the inner wall of the sampling tube (13). The limit blocks (23) are located on both sides of the baffles (21). A guide groove (25) is provided on the limit blocks (23) on the side away from the open end of the sampling tube (13). The guide groove (25) is inclined on the side close to the second spring (24).

5. A coastal wetland ecological sampling box according to claim 4, characterized in that: A connecting chamber (20) is provided on a side of the side wall of the sampling tube (13) near the slide groove (22); a connecting pipe (19) is connected between the connecting chamber (20) and the outlet end of the compression cylinder (16); a third spring (26) is fixedly connected to the inside of the connecting chamber (20); and a guide block (27) slidably connected to the connecting chamber (20) is fixedly connected to one end of the third spring (26) near the slide groove (22). The connecting cavity (20) is connected to the slide groove (22) on the side away from the sampling tube (13), the end of the guide block (27) away from the third spring (26) is inclined, and the guide block (27) matches the guide groove (25).

6. A coastal wetland ecological sampling box according to claim 3, characterized in that: The sampling control mechanism comprises a fixed rod (28) fixedly connected in the sampling cylinder (13), a piston (29) being slidably connected to the fixed rod (28), and the piston (29) is tightly fitted to the inner wall of the sampling cylinder (13).

7. A coastal wetland ecological sampling box according to claim 6, characterized in that: The sampling control mechanism further comprises a plurality of groups of communicating cylinders (30) fixedly connected to the inner wall of the sampling tube (13) near the motor (10); a driving wheel (11) is rotatably connected to the output end of the motor (10); a positioning rod (31) is slidably connected inside the driving wheel (11); a slot (32) matching the positioning rod (31) is provided on a side of the fixing plate (9) near the driving wheel (11); a control switch (33) is provided inside the slot (32); In the initial state, the positioning rod (31) at least partially extends into the sampling tube (13), and the output end of the connecting cylinder (30) is in contact with the positioning rod (31), and the control switch (33) is electrically connected to the motor (10).

8. A coastal wetland ecological sampling box according to claim 7, characterized in that: A belt (12) is arranged between the driving wheel (11) and the driven wheel (6) for driving the driven wheel (6) and the threaded column (4) to rotate synchronously with the driving wheel (11).

9. A coastal wetland ecological sampling box according to claim 5, characterized in that: The delay mechanism comprises a connecting groove (34) provided in the side wall of the sampling tube (13); the connecting groove (34) is connected to the sampling tube (13) and the connecting cavity (20); and the connecting groove (34) at least partially penetrates the connecting cavity (20); a fourth spring (35) is fixedly connected to the interior of the connecting groove (34); a sealing block (36) is fixedly connected to one end of the fourth spring (35) close to the connecting cavity (20); and the sealing block (36) is tightly fitted to the inner wall of the connecting groove (34).

10. A coastal wetland ecological sampling box according to claim 4, characterized in that: It also comprises an elastic sheet (37) fixedly connected to one side of the two groups of baffles (21) close to the opening end of the sampling tube (13), and the elastic sheet (37) is arranged in an arc shape.

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