A combined soil pore water sampler for coastal wetlands

Abstract

The invention discloses a combined coastal wetland soil pore water sampler, which belongs to the technical field of pore water sampling, and comprises a driving component for providing driving force, at least one group of connecting components for protection, and a conical portion, wherein the uppermost connecting component is connected to the lower end of the driving component by bolts, and the connecting components are connected by bolts in an up-and-down stacking manner, and the upper end of the conical portion is connected to the lowermost connecting component by bolts; the device can perform multiple groups of sampling of pore water at different depths, so as to protect the in-situ environment of the pore water in the sampling area as much as possible and avoid mixing of upper and lower layer water samples, while achieving simple and fast water sample collection and preservation.

Description

Technical Field

[0001] The invention belongs to the technical field of pore water sampling, and in particular relates to a coastal wetland soil pore water combined sampler. Background Art

[0002] Nutrients (mainly nitrates, nitrites, ammonium salts, phosphates and silicates) in the pore water of coastal wetland soil or sediments play an important supporting role in the growth of surface vegetation and phytoplankton in the waters, and are an indispensable source of macronutrients for maintaining wetland surface ecosystems and soil microbial ecosystems. Nutrients at different depths in the soil longitudinal profile not only involve groundwater exchange and flow, but also support for vegetation with roots at different depths, as well as the chemical transformation and loss of surface water in the soil at different penetration depths and during the penetration process, nitrification and denitrification, and other biochemical processes. Therefore, it has always been a difficult and hot topic in investigation and research.

[0003] Generally speaking, the acquisition of pore water at different depths in the longitudinal profile of coastal wetland soil can be roughly divided into two categories: one is destructive sampling, which first obtains soil or sediment samples by drilling or excavation, and then directly centrifuges or filters the soil or sediment, or uses a soil solution (pore water) sampler for infiltration on site. Although this sampling method can obtain water samples on site relatively quickly, it will destroy the in-situ environment, causing the samples to be contaminated by human sampling, and may also cause the pore water solution components to deteriorate due to changes in air pressure, temperature, and exposure to air oxidation conditions. There are two methods: one is in-situ undisturbed sampling, which is to bury the pipeline at a certain depth and take samples after a certain period of time. However, there are few devices and equipment for in-situ sampling of soil and sediment depth profiles in coastal wetlands. Even if there are individual in-situ sampling devices, the sampling depth and the number of simultaneous sampling are relatively small. It is difficult to ensure that the samples are not contaminated by external conditions, and it is difficult to prevent cross-contamination of samples at different depths. When the sampler is buried in the soil during use, the supporting force of the equipment above the soil is relatively small, and the sinking of the sampler cannot be avoided, resulting in inaccurate sampling accuracy.

[0004] Therefore, it is necessary to develop a new sampler based on the existing technology to perform multiple sampling of pore water at different depths, so as to protect the in-situ environment of the pore water in the sampling area as much as possible and avoid mixing of upper and lower layer water samples while achieving simple and quick water sample collection and preservation. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a coastal wetland soil pore water combined sampler.

[0006] The technical solution adopted by the present invention is as follows: a coastal wetland soil pore water combined sampler, comprising a driving component for providing driving force, at least one group of connecting components for protection and a tapered portion, wherein the uppermost connecting component is connected to the lower end of the driving component by bolts, and the connecting components are connected to each other by bolts in an upper and lower stacking manner, and the upper end of the tapered portion is connected to the lowermost connecting component by bolts;

[0007] The driving assembly includes a protective shell, which is a hollow structure with an opening at the lower end. The outer wall of the protective shell is provided with a plurality of groups of slot holes 1 for limiting, and the inner upper wall of the protective shell is provided with a plurality of groups of limiting slots 1 for limiting. A supporting pull piece is movably connected in any group of the limiting slots 1, and the other end of the supporting pull piece passes through the slot hole 1 and is arranged on the outer side of the protective shell. A gear 1 is movably installed at the center of the inner upper wall of the protective shell, and a gear 2 is also movably installed on the inner upper wall of the protective shell. The gear 1 and the gear 2 are meshingly connected, and a motor is installed on the upper wall of the protective shell. The motor is a forward and reverse motor, and the output shaft end of the motor is connected to the gear 2. The gear 1 is provided with a plurality of groups of rotating slots 1 for limiting, and the number of rotating slots 1, slot holes 1 and limiting slots 1 is the same. A driving rod 1 is movably connected in any group of the rotating slots 1, and the upper ends of the driving rods 1 are respectively connected to the supporting pull pieces, and the lower ends of the driving rods 1 are arranged at the lower end of the gear 1.

[0008] Preferably, the bottom wall of the protective shell is provided with a plurality of groups of limiting grooves 2 for limiting positioning, and a plurality of groups of slot holes 2 are provided inside the protective shell, and the slot holes 2 are staggered with the limiting grooves 2, and the slot holes 2 are arranged at the lower end of the supporting pulling member, and a baffle is movably clamped in any group of the slot holes 2, and a connecting rope is installed at the upper end of the baffle, and the upper end of the connecting rope is connected to the bottom wall of the supporting pulling member.

[0009] Among them, the connecting component includes a connecting shell, and the upper wall of the connecting shell is provided with multiple groups of plug plates 1 and multiple groups of slot holes 3, the plug plates 1 and slot holes 3 are arranged alternately, the plug plates 1 are movably clamped in the limiting slots 2, the slot holes 3 penetrate the connecting shell, the slot holes 3 are connected with the slot holes 2, and the bottom wall of the connecting shell is provided with multiple groups of limiting slots 3 for limiting, when the connecting components are stacked, the plug plates 1 of the next group of connecting components are movably clamped in the limiting slots 3 of the previous group of connecting components.

[0010] As a preferred embodiment of the present invention, a limiting member is provided on the inner side wall of the connecting shell, a driving disk is movably connected in the limiting member, the driving disk is arranged at the lower end of gear one, a plurality of groups of rotating grooves two for limiting are provided on the driving disk, the number and structure of rotating grooves one and rotating grooves two are the same, a driving rod two is movably connected in any group of rotating grooves two, and the upper ends of the driving rods two are respectively connected to the lower ends of the driving rods one by threads.

[0011] Furthermore, a limiting block is connected to the limiting member, a slide groove is provided between two adjacent groups of the limiting blocks, a pushing member is installed on the second driving rod, a sampling assembly is installed on the pushing member, and the pushing member and the sampling assembly are both movably arranged on the upper wall of the driving disk and movably clamped in the slide groove.

[0012] Furthermore, the sampling assembly includes a storage bottle and a sampling bottle, and the sampling bottle and the storage bottle are both movably clamped on the pushing member, the upper ends of the sampling bottle and the storage bottle are connected through a connecting tube 1, and the lower ends of the sampling bottle and the storage bottle are connected through a connecting tube 2. A pushing plate 1 is movably provided in the sampling bottle, and the pushing plate 1 and the sampling bottle are sealed, similar to the connection relationship between a piston and a syringe. A spring is connected between the pushing plate 1 and the bottom wall of the sampling bottle, and the bottom wall of the pushing plate 1 is made of magnetic material. A pushing plate 2 is movably provided in the storage bottle, and the pushing plate 2 and the storage bottle are sealed, similar to the connection relationship between a piston and a syringe. The connecting tube 1 is provided at the upper ends of the pushing plate 1 and the pushing plate 2, and the connecting tube 2 is provided at the lower ends of the pushing plate 1 and the pushing plate 2.

[0013] Among them, a sampling port is installed at the upper end of the sampling bottle and covered by a filter membrane. Porous water enters the sampling bottle at the upper end of the push plate through the sampling port. An air outlet is installed at the lower end of the sampling bottle. Connecting tube one, connecting tube two and the air outlet are all provided with a one-way valve. The one-way valve in the air outlet controls the discharge of gas in the sampling bottle, the one-way valve in connecting tube one controls the sampling liquid of the sampling bottle to enter the storage bottle, and the one-way valve in connecting tube two controls the gas in the storage bottle to enter the sampling bottle.

[0014] As a preferred embodiment of the present invention, a magnetic part 1 is provided on the upper wall of the driving disk, and the magnetic part 1 is placed close to the center of the driving disk, and the magnetism of the magnetic part 1 is the same as that of the pushing plate 1. When the pushing member drives the sampling component to be located near the center of the driving disk, under the action of the magnetic part 1, the pushing plate 1 is repelled, so that the pushing plate 1 stays at the upper end of the sampling bottle, and the spring is in a stretched state.

[0015] Preferably, the baffle is provided with a plurality of sampling ports 1 for sampling, and the side wall of the connecting shell is provided with a plurality of sampling ports 2 for sampling, and the sampling ports 2 are through-connected with the slots 3. When the baffle is moved up and down, the position of the sampling port 1 can be adjusted so that the sampling port 1 and the corresponding sampling port 2 are through-connected. When the driving rod 2 drives the sampling device to move outward to the position of the sampling port 1 and the sampling port 2, the pore water can be sampled.

[0016] Among them, the rotating groove one and the rotating groove two are both arc-shaped structures, and the rotating groove two is arranged at the lower end of the rotating groove one; the conical part is a conical structure, and the upper end of the conical part is provided with multiple groups of plug plates two and multiple groups of slot holes four, the plug plates two and slot holes four are staggered, the plug plates two are movably clamped in the limiting groove three, the slot holes four are through-connected with the slot holes three, and the baffle is movably clamped in the slot holes four.

[0017] After adopting the above structure, the beneficial effects of the present invention are as follows:

[0018] (1) The sampling time can be controlled. The device is inserted into a suitable coastal wetland soil, and is left to stand for a period of time until the soil inside the inserted device is stable before sampling. The sampling result is more accurate, which overcomes the defect of the existing device that directly samples when it is just inserted, causing damage to the internal environment of the wetland, resulting in inaccurate sampling results.

[0019] (2) When sampling, the support puller is in an outwardly expanded state. The expanded support puller increases the supporting area on the ground, preventing the sampling device from sinking and causing inaccurate sampling depth.

[0020] (3) When the pusher drives the sampling assembly to move to the position of sampling port 1 and sampling port 2 on the outer ring of the driving disk, the spring drives the push plate to move down, so that the pressure at the upper end of the sampling bottle is reduced, and at the same time, the gas at the lower end of the sampling bottle is discharged through the air outlet, which is convenient for sampling pore water. At the same time, multiple groups of sampling ports 1 and 2 are set at the same depth, which is convenient for simultaneous sampling of multiple groups.

[0021] (4) When the supporting pull member is in a state of being retracted inward, the baffle moves downward under the action of gravity, and the position of sampling port 1 on the baffle is adjusted so that sampling port 1 and sampling port 2 are staggered. The baffle blocks sampling port 2 to reduce the risk of contamination by soil or pore water at different depths when the equipment is taken out.

[0022] (5) Push plate 1 squeezes the liquid in the sampling bottle into the storage bottle through connecting tube 1. At the same time, the pressure at the lower end of the sampling bottle is reduced, and the storage bottle discharges the gas into the sampling bottle through connecting tube 2. The pressure in the storage bottle is reduced, which makes it easier to transfer the sampling liquid. When the entire equipment is extracted from the soil, the storage bottle can be directly transferred, which overcomes the defect that the existing sampling liquid is easily contaminated when it is transferred from the sampling bottle to the storage bottle in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0024] Figure 1This is a schematic diagram of the structure of a coastal wetland soil pore water combined sampler proposed by the present invention;

[0025] Figure 2 This is a front and cross-sectional view of a coastal wetland soil pore water combined sampler proposed by the present invention;

[0026] Figure 3 for Figure 2 A local enlarged view of point A;

[0027] Figure 4 It is a schematic diagram of the structure of the sampling assembly proposed by the present invention;

[0028] Figure 5 A partial structural cross-sectional view of a coastal wetland soil pore water combined sampler proposed by the present invention;

[0029] Figure 6 for Figure 5 A local enlarged view of point B;

[0030] Figure 7 for Figure 5 A local enlarged view of point C;

[0031] Figure 8 for Figure 5 A local enlarged view of D;

[0032] Fig. 9 for Figure 5 A local enlarged view of point E;

[0033] Fig.10 A schematic diagram of the connection between the driving assembly and the connecting assembly proposed by the present invention;

[0034] Fig.11 A schematic diagram of the structure of the driving assembly proposed by the present invention;

[0035] Fig.12 It is a schematic structural diagram of the tapered portion proposed by the present invention;

[0036] Fig.13 A schematic diagram of the structure of the connecting shell proposed by the present invention;

[0037] Fig.14 This is a cross-sectional view of the connecting shell proposed by the present invention.

[0038] In the attached drawings: 1. driving assembly, 2. connecting assembly, 3. conical portion, 4. protective shell, 5. slot hole 1, 6. limiting slot 1, 7. supporting puller, 8. gear 1, 9. gear 2, 10. motor, 11. rotating slot 1, 12. driving rod 1, 13. limiting slot 2, 14. slot hole 2, 15. baffle, 16. connecting rope, 17. connecting shell, 18. plug plate 1, 19. slot hole 3, 20. limiting slot 3, 2 1. Limiting member, 22. Driving disk, 23. Rotating slot 2, 24. Driving rod 2, 25. Limiting block, 26. Sliding slot, 27. Pushing member, 28. Sampling assembly, 29. Storage bottle, 30. Sampling bottle, 31. Pushing plate 1, 32. Spring, 33. Pushing plate 2, 34. Sampling port, 35. Air outlet, 36. Magnetic member 1, 37. Sampling port 1, 38. Sampling port 2, 39. Inserting plate 2, 40. Slot 4. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described 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; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] like Figure 1-Figure 14 As shown, a coastal wetland soil pore water combined sampler includes a driving component 1 for providing driving force, at least one set of connecting components 2 for protection, and a conical portion 3, wherein the uppermost connecting component 2 is connected to the lower end of the driving component 1 by bolts, and the connecting components 2 are connected by bolts in an upper and lower stacking manner, and the upper end of the conical portion 3 is connected to the lowermost connecting component 2 by bolts;

[0042] The driving assembly 1 includes a protective shell 4, which is a hollow structure with an opening at the lower end. The outer wall of the protective shell 4 is provided with a plurality of groups of slots 5 for limiting, and the inner upper wall of the protective shell 4 is provided with a plurality of groups of limiting grooves 6 for limiting. A supporting puller 7 is movably connected in any group of the limiting grooves 6, and the other end of the supporting puller 7 passes through the slot 5 and is arranged on the outer side of the protective shell 4. A gear 8 is movably installed at the center of the inner upper wall of the protective shell 4, and a gear 2 9 is also movably installed on the inner upper wall of the protective shell 4. The wheel 18 is meshed with the gear 29, and a motor 10 is installed on the upper wall of the protective shell 4. The motor 10 is a forward and reverse motor. The output shaft end of the motor 10 is connected to the gear 29. The gear 18 is provided with a plurality of groups of rotating grooves 11 for limiting. The number of the rotating grooves 11, the slot holes 15 and the limiting grooves 6 is the same. A driving rod 12 is movably connected in any group of the rotating grooves 11. The upper ends of the driving rods 12 are respectively connected to the supporting pull members 7, and the lower ends of the driving rods 12 are arranged at the lower end of the gear 18.

[0043] It should be noted that the motor 10 drives the gear 29 to rotate, the gear 29 drives the gear 18 meshing therewith to rotate, the gear 18 drives the rotating slot 11 to rotate when it rotates, the rotating slot 11 drives the driving rod 12 when it rotates, the driving rod 12 drives the supporting pull member 7 to reciprocate along the limiting slot 6, when the driving rod 12 pushes the supporting pull member 7 to move outward along the limiting slot 6, the supporting pull member 7 is in an outwardly expanded state, when the driving rod 12 pushes the supporting pull member 7 to move inward along the limiting slot 6, the supporting pull member 7 is in an inwardly retracted state.

[0044] In this embodiment, the bottom wall of the protective shell 4 is provided with a plurality of groups of limiting grooves 13 for limiting, and the protective shell 4 is provided with a plurality of groups of slot holes 14, the slot holes 14 and the limiting grooves 13 are arranged alternately, the slot holes 14 are arranged at the lower end of the supporting pull member 7, and a baffle 15 is movably connected in any group of the slot holes 14, and a connecting rope 16 is installed on the upper end of the baffle 15, and the upper end of the connecting rope 16 is connected to the bottom wall of the supporting pull member 7; when the supporting pull member 7 is expanded outward, the connecting rope 16 is driven to move upward, and the connecting rope 16 drives the baffle 15 to move upward, and the position of the sampling port 37 on the baffle 15 is adjusted. At the same time, the expanded supporting pull member 7 increases the supporting area of ​​the ground to prevent the sampling device from sinking. When the supporting pull member 7 is retracted inward, the connecting rope 16 is driven to move downward, and the baffle 15 moves downward under the action of gravity.

[0045] The connecting component 2 comprises a connecting shell 17, the upper wall of which is provided with a plurality of groups of plug plates 18 and a plurality of groups of slot holes 3 19, the plug plates 18 and slot holes 3 19 are arranged alternately, the plug plates 18 are movably snap-connected in the limiting grooves 2 13, the slot holes 3 19 penetrate the connecting shell 17, the slot holes 3 19 are connected with the slot holes 2 14, the bottom wall of the connecting shell 17 is provided with a plurality of groups of limiting grooves 3 20 for limiting, when the connecting components 2 are stacked, the plug plates 18 of the next group of connecting components 2 are movably snap-connected in the limiting grooves 3 20 of the previous group of connecting components 2.

[0046] It should be noted that a limit piece 21 is provided on the inner wall of the connecting shell 17, and a drive disk 22 is movably connected to the limit piece 21. The drive disk 22 is arranged at the lower end of the gear 8, and a plurality of groups of rotating grooves 23 for limiting are provided on the drive disk 22. The number and structure of the rotating grooves 11 and 23 are the same. The rotating grooves 11 and 23 are both arc-shaped structures, and the rotating grooves 23 are arranged at the lower end of the rotating grooves 11. A drive rod 24 is movably connected to any group of the rotating grooves 23, and the upper ends of the driving rods 24 are respectively connected to the lower ends of the driving rods 12 by threads; when the driving rod 12 moves along the rotating groove 11, the driving rod 24 is driven to move along the rotating groove 23, and the driving rod 24 drives the driving disk 22 to rotate through the rotating groove 23.

[0047] The limiting member 21 is connected to a limiting block 25, and a slide groove 26 is provided between two adjacent groups of the limiting blocks 25. A pushing member 27 is installed on the second driving rod 24, and a sampling assembly 28 is installed on the pushing member 27. The pushing member 27 and the sampling assembly 28 are both movably provided on the upper wall of the driving disk 22, and movably clamped in the slide groove 26.

[0048] The sampling assembly 28 includes a storage bottle 29 and a sampling bottle 30, and the sampling bottle 30 and the storage bottle 29 are both movably connected to the pushing member 27, the upper ends of the sampling bottle 30 and the storage bottle 29 are connected through a connecting tube 1, and the lower ends of the sampling bottle 30 and the storage bottle 29 are connected through a connecting tube 2, a pushing plate 1 31 is movably provided in the sampling bottle 30, and the pushing plate 1 31 and the sampling bottle 30 are sealed, similar to the connection relationship between a piston and a syringe, a spring 32 is connected between the pushing plate 1 31 and the bottom wall of the sampling bottle 30, and the bottom wall of the pushing plate 1 31 is made of magnetic material, a pushing plate 2 33 is movably provided in the storage bottle 29, and the pushing plate 2 33 and the storage bottle 29 are sealed, similar to the connection relationship between a piston and a syringe, the connecting tube 1 is provided at the upper ends of the pushing plates 1 31 and 2 33, and the connecting tube 2 is provided at the lower ends of the pushing plates 1 31 and 2 33.

[0049] It should be noted that a sampling port 34 is installed at the upper end of the sampling bottle 30 and is covered by a filter membrane. Porous water enters the sampling bottle 30 at the upper end of the push plate 31 through the sampling port 34. An air outlet 35 is installed at the lower end of the sampling bottle 30. Connecting tube 1, connecting tube 2 and the air outlet 35 are all provided with a one-way valve. The one-way valve in the air outlet 35 controls the discharge of gas in the sampling bottle 30. The one-way valve in connecting tube 1 controls the sampling liquid of the sampling bottle 30 to enter the storage bottle 29. The one-way valve in connecting tube 2 controls the gas in the storage bottle 29 to enter the sampling bottle 30.

[0050] In this embodiment, a magnetic member 36 is provided on the upper wall of the driving disk 22, and the magnetic member 36 is placed near the center of the driving disk 22, and the magnetism of the magnetic member 36 is the same as that of the pushing plate 31. When the pushing member 27 drives the sampling assembly 28 to be located near the center of the driving disk 22, under the action of the magnetic member 36, the pushing plate 31 is repelled, so that the pushing plate 31 stays on the upper end of the sampling bottle 30, and the spring 32 is in a stretched state. When the pushing member 27 drives the sampling assembly 28 to be located on the outer ring of the driving disk 22, the spring 32 drives the pushing plate 31 to move downward, so that The pressure at the upper end of the sampling bottle 30 is reduced, which is convenient for sampling the pore water. At the same time, the gas at the lower end of the sampling bottle 30 is discharged through the vent 35. When the sampling is completed, the pusher 27 drives the sampling assembly 28 back to the center position close to the driving disk 22, and the repulsive force of the magnetic member 36 on the push plate 31 drives the push plate 31 to move upward. The liquid in the sampling bottle 30 enters the storage bottle 29 through the connecting tube 1. At the same time, the pressure at the lower end of the sampling bottle 30 is reduced, and the storage bottle 29 discharges the gas into the sampling bottle 30 through the connecting tube 2. The pressure in the storage bottle 29 is reduced, which is more convenient for the transfer of the sampled liquid.

[0051] The baffle plate 15 is provided with a plurality of sampling ports 1 37 for sampling, and the side wall of the connecting shell 17 is provided with a plurality of sampling ports 2 38 for sampling. The sampling ports 2 38 are connected through the slot 3 19. When the baffle plate 15 is moved up and down, the position of the sampling port 1 37 can be adjusted so that the sampling port 1 37 and the corresponding sampling port 2 38 are connected through. When the driving rod 2 24 drives the sampling device to move outward to the position of the sampling port 1 37 and the sampling port 2 38, the pore water can be sampled.

[0052] The conical portion 3 is a conical structure, and a plurality of groups of second plug plates 39 and a plurality of groups of fourth slot holes 40 are provided at the upper end of the conical portion 3. The second plug plates 39 and the fourth slot holes 40 are alternately arranged, the second plug plates 39 are movably snap-connected in the limiting slots 3, the fourth slot holes 40 are through-connected with the third slot holes, and the baffle plate 15 is movably snap-connected in the fourth slot holes 40.

[0053] The specific implementation is as follows:

[0054] Adjust the number of connecting components 2 as needed, select the baffle 15 of appropriate length, and then insert the plug plate 18 on the uppermost connecting component 2 into the limiting groove 2 13 of the protective shell 4 and fix it with bolts. The baffle 15 is set through the slot hole 3 19 to realize the connection between the connecting component 2 and the driving component 1. The connecting components 2 are connected by bolts in an upper and lower stacking manner. The plug plate 18 of the next group of connecting components 2 is movably connected in the limiting groove 3 20 of the previous group of connecting components 2. The baffle 15 is set through the slot hole 3 19, and then the driving rod 24 is respectively inserted through the rotating groove 23 and placed. The upper end of the driving rod 24 is screwed on the lower end of the driving rod 12 through a thread, and the plug plate 2 39 at the upper end of the conical part 3 is inserted into the limiting groove 3 20 of the lowermost connecting component 2 and fixed with bolts. Then the assembled equipment is inserted into a suitable coastal wetland soil and left to stand for a period of time;

[0055] After the soil inside the inserted device is stable, the motor 10 starts to drive the gear 29 to rotate, and the gear 29 drives the gear 18 meshing therewith to rotate. When the gear 18 rotates, it drives the rotating slot 11 to rotate. When the rotating slot 11 rotates, it drives the driving rod 12, and the driving rod 12 drives the supporting pull member 7 to move along the limiting slot 6. When the driving rod 12 pushes the supporting pull member 7 to move outward along the limiting slot 6, the supporting pull member 7 is in an outwardly expanded state, driving the connecting rope 16 to move upward, and the connecting rope 16 drives the baffle 15 to move upward, and adjusts the position of the sampling port 137 on the baffle 15, so that the sampling port 137 and the sampling port 238 are connected. At the same time, the expanded supporting pull member 7 increases the support area of ​​the ground to prevent the sampling device from sinking.

[0056] Initially, the sampling assembly 28 is arranged at the center position close to the driving disk 22. Under the action of the magnetic member 36, the pushing plate 31 is repelled so that the pushing plate 31 stays at the upper end of the sampling bottle 30, and the spring 32 is in a stretched state. At this time, the sampling port 1 37 and the corresponding sampling port 2 38 are connected through. When the driving rod 12 moves along the rotating groove 1 11, the driving rod 24 is driven to move along the rotating groove 23. The driving rod 24 drives the driving disk 22 to rotate through the rotating groove 23. When the driving rod 24 moves in the direction close to the connecting shell 17, it drives the pushing member 27 to move. At this time, when the pushing member 27 drives the sampling assembly 28 to move to the position of the sampling port 1 37 and the sampling port 2 38 on the outer ring of the driving disk 22, the spring 32 drives the pushing plate 1 31 to move downward, so that the pressure on the upper end of the sampling bottle 30 is reduced. At the same time, the gas at the lower end of the sampling bottle 30 is discharged through the air outlet 35, which is convenient for sampling the pore water.

[0057] After sampling is completed, the motor 10 works in the reverse direction, driving the gear 29 to rotate in the reverse direction, and the gear 29 drives the meshing gear 18 to rotate in the reverse direction. When the gear 18 rotates, it drives the rotating slot 11 to rotate in the reverse direction. When the rotating slot 11 rotates, it drives the driving rod 12, and the driving rod 12 drives the supporting pull member 7 to move in the reverse direction along the limiting slot 6. When the driving rod 12 pushes the supporting pull member 7 to move inward along the limiting slot 6, the supporting pull member 7 is in an inwardly retracted state, driving the connecting rope 16 to move downward, and the baffle 15 moves downward under the action of gravity, adjusting the position of the sampling port 137 on the baffle 15, so that the sampling port 137 and the sampling port 238 are staggered, and the baffle 15 blocks the sampling port 238 to reduce the risk of being contaminated by soil or pore water at different depths when the equipment is taken out;

[0058] At the same time, when the driving rod 12 moves in the opposite direction along the rotating groove 11, the driving rod 24 is driven to move in the opposite direction along the rotating groove 23. The driving rod 24 drives the driving disk 22 to rotate in the opposite direction through the rotating groove 23. When the driving rod 24 drives the sampling assembly 28 back to the center position close to the driving disk 22 through the pushing member 27, the repulsive force of the magnetic member 36 on the pushing plate 31 drives the pushing plate 31 to move upward, and the liquid in the sampling bottle 30 enters the storage bottle 29 through the connecting tube 1. At the same time, the pressure at the lower end of the sampling bottle 30 is reduced, and the storage bottle 29 discharges the gas into the sampling bottle 30 through the connecting tube 2. The pressure in the storage bottle 29 is reduced, which makes it easier to transfer the sampling liquid. When the entire equipment is extracted from the soil, the storage bottle 29 can be directly transferred, thereby overcoming the defect that the sampling liquid is easily contaminated when it is transferred from the sampling bottle 30 to the storage bottle 29 in the air.

[0059] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents. In short, if those skilled in the art are inspired by them and design structural modes and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they shall all fall within the scope of protection of the present invention.

Claims

1. A coastal wetland soil pore water combined sampler, characterized in that: It includes a driving assembly for providing driving force, at least one set of connecting assemblies for protection, and a tapered portion, wherein the uppermost connecting assembly is connected to the lower end of the driving assembly by bolts, and the connecting assemblies are connected to each other by bolts in an up-and-down stacking manner, and the upper end of the tapered portion is connected to the lowermost connecting assembly by bolts; The driving assembly includes a protective shell, the protective shell is a cavity structure with an opening at the lower end, the outer side wall of the protective shell is provided with a plurality of groups of slot holes 1 for limiting, the inner upper wall of the protective shell is provided with a plurality of groups of limiting slots 1 for limiting, any group of the limiting slots 1 is movably connected with a supporting puller, the other end of the supporting puller passes through the slot hole 1 and is arranged on the outer side of the protective shell, a gear 1 is movably installed at the center of the inner upper wall of the protective shell, a gear 2 is also movably installed on the inner upper wall of the protective shell, the gear 1 and the gear 2 are meshingly connected, a motor is installed on the upper wall of the protective shell, the output shaft end of the motor is connected to the gear 2, the gear 1 is provided with a plurality of groups of rotating slots 1 for limiting, a driving rod 1 is movably connected in any group of the rotating slots 1, the upper ends of the driving rods 1 are respectively connected to the supporting puller, and the lower end of the driving rod 1 is arranged at the lower end of the gear 1; The bottom wall of the protective shell is provided with a plurality of groups of limiting grooves 2 for limiting positions, and the protective shell is provided with a plurality of groups of slot holes 2, the slot holes 2 and the limiting grooves 2 are arranged alternately, the slot holes 2 are arranged at the lower end of the supporting pull member, and a baffle is movably connected in any group of the slot holes 2, and a connecting rope is installed at the upper end of the baffle, and the upper end of the connecting rope is connected to the bottom wall of the supporting pull member; The connection assembly includes a connection shell, the baffle is provided with a plurality of groups of sampling ports 1 for sampling, and the side wall of the connection shell is provided with a plurality of groups of sampling ports 2 for sampling; When the driving rod pushes the support pull piece to move outward along the limiting groove, the support pull piece is in an outwardly extended state, and when the driving rod pushes the support pull piece to move inward along the limiting groove, the support pull piece is in an inwardly retracted state; When the baffle is moved up and down, the position of the sampling port 1 can be adjusted so that the sampling port 1 is connected with the corresponding sampling port 2; The position of sampling port 1 on the baffle is adjusted so that sampling port 1 and sampling port 2 are staggered, and the baffle blocks sampling port 2.

2. The coastal wetland soil pore water combined sampler according to claim 1, characterized in that: The upper wall of the connecting shell is provided with multiple groups of plug plates 1 and multiple groups of slot holes 3, the plug plates 1 and slot holes 3 are arranged alternately, the plug plates 1 are movably connected in the limiting slots 2, the slot holes 3 penetrate the connecting shell, the slot holes 3 are connected with the slot holes 2, and the bottom wall of the connecting shell is provided with multiple groups of limiting slots 3 for limiting, when the connecting components are stacked, the plug plates 1 of the next group of connecting components are movably connected in the limiting slots 3 of the previous group of connecting components.

3. The coastal wetland soil pore water combined sampler according to claim 2, characterized in that: A limiting piece is provided on the inner side wall of the connecting shell, and a driving disk is movably connected in the limiting piece. The driving disk is arranged at the lower end of gear one, and a plurality of groups of rotating grooves two for limiting are provided on the driving disk. A driving rod two is movably connected in any group of the rotating grooves two, and the upper ends of the driving rods two are respectively connected to the lower ends of the driving rods one by threads.

4. The coastal wetland soil pore water combined sampler according to claim 3, characterized in that: The limiting member is connected to a limiting block, a slide groove is provided between two adjacent groups of the limiting blocks, a pushing member is installed on the second driving rod, a sampling assembly is installed on the pushing member, the pushing member and the sampling assembly are both movably arranged on the upper wall of the driving disk, and movably clamped in the slide groove.

5. The coastal wetland soil pore water combined sampler according to claim 4, characterized in that: The sampling assembly includes a storage bottle and a sampling bottle, and the sampling bottle and the storage bottle are both movably clamped on the pushing member. The upper ends of the sampling bottle and the storage bottle are connected through a connecting tube 1, and the lower ends of the sampling bottle and the storage bottle are connected through a connecting tube 2. A pushing plate 1 is movably provided in the sampling bottle, a spring is connected between the pushing plate 1 and the bottom wall of the sampling bottle, the bottom wall of the pushing plate 1 is made of magnetic material, a pushing plate 2 is movably provided in the storage bottle, the connecting tube 1 is provided at the upper ends of the pushing plate 1 and the pushing plate 2, and the connecting tube 2 is provided at the lower ends of the pushing plate 1 and the pushing plate 2.

6. The coastal wetland soil pore water combined sampler according to claim 5, characterized in that: The upper end of the sampling bottle is provided with a sampling port, the lower end of the sampling bottle is provided with an air outlet, and the connecting pipe 1, the connecting pipe 2 and the air outlet are all provided with a one-way valve.

7. The coastal wetland soil pore water combined sampler according to claim 6, characterized in that: A magnetic component 1 is disposed on the upper wall of the driving disk. The magnetic component 1 is placed close to the center of the driving disk, and the magnetism of the magnetic component 1 is the same as that of the pushing plate 1.

8. The coastal wetland soil pore water combined sampler according to claim 7, characterized in that: The sampling port 2 is connected with the slot 3.

9. The coastal wetland soil pore water combined sampler according to claim 8, characterized in that: The rotating groove one and the rotating groove two are both arc-shaped structures, and the rotating groove two is arranged at the lower end of the rotating groove one; the tapered portion is a conical structure, and the upper end of the tapered portion is provided with multiple groups of plug plates two and multiple groups of slot holes four, the plug plates two and the slot holes four are staggered, the plug plates two are movably clamped in the limiting groove three, the slot holes four are through-connected with the slot holes three, and the baffle is movably clamped in the slot holes four.

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