Sampling device for wetland soil layer
By designing a wetland soil sampling device including a sampling shell, a cylinder and a guide plate, the problem of difficult to separate soil layers and soil mixing in the prior art is solved, and more efficient and accurate soil sampling is achieved.
Patent Information
- Application Number
- CN202510212840.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2025-04-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing wetland soil sampling devices are difficult to effectively separate soil layers of different depths of wetland soil, and are prone to mixed soil axial flow, affecting the accuracy of sampling detection.
A sampling device including a sampling shell, a cylinder and a guide plate is designed. Through the combination of circular plates, guide plates, movable blocks and connecting rods, the layered sampling of soil and the effective elimination of mixed soil are achieved.
The device can effectively separate soil layers at different depths, reduce soil confusion, and improve the accuracy and practicality of sampling and detection.
Smart Images
Figure CN119804012A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of wetland soil sampling devices, and in particular to a sampling device for wetland soil layers. Background Art
[0002] Wetlands can protect biodiversity, regulate runoff, improve water quality, and adjust microclimate. In order to ensure that the wetland soil matrix can meet the growth conditions of most plants, it is necessary to sample and test the wetland soil layer.
[0003] Since wetland soil is affected by long-term or periodic flooding, the soil is usually soft and moist, and the fluidity of wetland soil is large. When most existing sampling devices collect wetland soil, they cannot separate the wetland soil into multiple soil layers according to different depths. At the same time, wetland soil is prone to axial flow and mixing, and it is difficult to maintain the original distribution of materials in soil layers of different depths, which affects the practicality of the sampling device and the accuracy of sampling detection. In order to address the shortcomings of the existing technology, we propose a sampling device for wetland soil layers. Summary of the invention
[0004] The main purpose of the present invention is to provide a sampling device for wetland soil layers, which can effectively solve the problems in the background technology.
[0005] To achieve the above object, the technical solution adopted by the present invention is:
[0006] A sampling device for wetland soil layers, comprising a sampling shell, a pointed cone block is detachably connected to the bottom of the sampling shell, a cylinder is sleeved on the outside of the top of the sampling shell, a symmetrical pedal is detachably connected to the outer surface of the cylinder, a No. 1 ring is fixedly connected to the bottom surface of the cylinder, a spring is threadedly connected to the inner side of the No. 1 ring, a mounting ring is fixedly connected to the tail of the spring, the inner side of the mounting ring is threadedly connected to the surface of the sampling shell, a limiting ring is arranged on the top of the cylinder, a symmetrical No. 2 ring is fixedly connected to the inner side of the cylinder, and the surface of the No. 2 ring A plurality of No. 1 grooves are provided, a movable block is installed inside the cylinder, a plurality of raised blocks are fixedly connected to the outer surface of the movable block, a plurality of No. 2 grooves are provided on the outer surface of the sampling shell, the raised blocks are embedded in the No. 2 grooves, a No. 1 rod is detachably connected to the axis of the bottom of the cylinder, a plurality of circular plates are slidably connected to the surface of the No. 1 rod, a plurality of guide plates are rotatably connected to the edge of the circular plate, the inner side of the guide plate is set as an inclined surface and provided with a slide groove, a connecting rod is slidably connected inside the slide groove, and a plurality of pads are provided at the outer edge of the circular plate.
[0007] Preferably, an elastic membrane is fixedly connected between the guide plates, the elastic membrane is sleeved on the outside of the sampling shell, the upper and lower ends of the elastic membrane are sleeved with elastic steel rods, and the ends of the elastic steel rods are slidably connected inside the guide plates.
[0008] Preferably, a plurality of thread grooves are formed on the outer surface of the sampling housing, and the inner sides of the mounting ring and the limiting ring are both engaged with the thread grooves.
[0009] Preferably, a reinforcing plate is fixedly connected to the middle portion of the sampling shell, a protective film is arranged on the outer side of the reinforcing plate, a connecting ring is fixedly connected to the tail of the protective film, and the connecting ring is rotatably connected to the bottom surface of the mounting ring.
[0010] Preferably, a fixing plate is detachably connected to the upper surface of the circular plate, the fixing plate is rotatably connected to the bottom of the guide plate, a plurality of No. 3 grooves are provided on the outer surface of the sampling shell, and the end of the pad is engaged with the No. 3 groove.
[0011] Preferably, a plurality of L-shaped plates are fixedly connected to the bottom of the No. 1 ring, a plurality of No. 4 grooves are opened on the outer surface of the mounting ring, and the L-shaped plates are embedded in the No. 4 grooves.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] 1. In the present invention, the circular plate, guide plate, movable block, No. 1 rod and connecting rod are arranged, the circular plate divides the internal space of the lower shell into multiple spaces, the circular plate and multiple guide plates and part of the inner side of the sampling shell form a layered space, the cylinder is pushed to make the movable block drive the connecting rod to move along the slide groove through the No. 1 rod, so that the bottom of the guide plate rotates around the circular plate, and then the opening of the layered space is opened, and soil layers of different depths flow along the opening to the corresponding layered space, so that the collected samples are separated according to different depths, which is conducive to improving the practicality of the sampling device.
[0014] 2. In the present invention, by setting the guide plate, during the process of opening the guide plate, the guide plate pushes the mixed soil to move outward, so that the mixed soil is away from the opening of the stratified space, which is beneficial to reduce the mixed soil from entering the stratified space, improves the originality of the material distribution in the soil layers of different depths, and is beneficial to improve the accuracy of sampling and detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the sampling device of the present invention;
[0016] Figure 2 It is a schematic diagram of the relevant structure of the sampling housing of the present invention;
[0017] Figure 3 It is a schematic diagram of the relevant structure of the cylinder of the present invention;
[0018] Figure 4 yes Figure 3 A partial enlarged view of the middle part;
[0019] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle;
[0020] Figure 6 It is a schematic diagram of the relevant structure of the mounting ring of the present invention;
[0021] Figure 7 It is a schematic diagram of the relevant structure of the guide plate of the present invention.
[0022] In the figure:
[0023] 1. Sampling shell; 11. Conical block; 12. Threaded groove; 13. Slot No. 2; 14. Slot No. 3; 15. Pad; 2. Cylinder; 21. Pedal; 3. Ring No. 1; 31. L-shaped plate; 32. Spring; 33. Mounting ring; 34. Slot No. 4; 35. Limiting ring; 4. Ring No. 2; 41. Slot No. 1; 42. Movable block; 43. Raised block; 44. Rod No. 1; 45. Round plate; 5. Guide plate; 51. Slide groove; 52. Connecting rod; 53. Fixed plate; 6. Elastic membrane; 61. Elastic steel rod; 7. Reinforcement plate; 71. Protective membrane; 72. Connecting ring. DETAILED DESCRIPTION
[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0025] A sampling device for wetland soil layers comprises a sampling shell 1, a pointed cone block 11 is detachably connected to the bottom of the sampling shell 1, a cylinder 2 is sleeved on the top of the sampling shell 1, a symmetrical pedal 21 is detachably connected to the outer surface of the cylinder 2, a No. 1 ring 3 is fixedly connected to the bottom surface of the cylinder 2, a spring 32 is threadedly connected to the inner side of the No. 1 ring 3, a mounting ring 33 is fixedly connected to the tail of the spring 32, the inner side of the mounting ring 33 is threadedly connected to the surface of the sampling shell 1, a limiting ring 35 is arranged on the top of the cylinder 2, a symmetrical No. 2 ring 4 is fixedly connected to the inner side of the cylinder 2, and a plurality of No. 1 rings 4 are provided on the surface of the No. 2 ring 4. A No. 1 groove 41 is provided, and a movable block 42 is installed inside the cylinder 2. A plurality of protruding blocks 43 are fixedly connected to the outer surface of the movable block 42. A plurality of No. 2 grooves 13 are provided on the outer surface of the sampling shell 1. The protruding blocks 43 are engaged with the No. 2 grooves 13. A No. 1 rod 44 is detachably connected to the axis at the bottom of the cylinder 2. A plurality of circular plates 45 are slidably connected to the surface of the No. 1 rod 44. A plurality of guide plates 5 are rotatably connected to the edge of the circular plate 45. The inner side of the guide plate 5 is set as an inclined surface and provided with a slide groove 51. A connecting rod 52 is slidably connected inside the slide groove 51. A plurality of pads 15 are installed at the bottom edge of the circular plate 45.
[0026] like Figure 1As shown, the sampling shell 1 can be divided into an upper shell and a lower shell from the middle part of the sampling shell 1, and the segmented connection method can be threaded connection, for example, the segmented end of the upper shell is a concave screw mouth, and the segmented end of the lower shell is a convex screw mouth, so that the sampling shell 1 is convenient to be placed in the tool box, and at the same time, the tail of the sampling shell 1 is threadedly connected to the pointed cone block 11, and the adjacent lower shells can also be threadedly connected, for example, the two ends of the lower shell can be respectively set as a convex screw mouth and a concave screw mouth, so that one upper shell cooperates with multiple lower shells to splice sampling shells 1 of different lengths, so as to adapt to the scene of sampling different soil depths;
[0027] like Figure 1-Figure 4 As shown, the cylinder 2 is sleeved on the outer side of the upper shell body, and a No. 1 ring 3 is fixedly connected to the bottom of the cylinder 2. A rotation groove is provided on the inner side of the No. 1 ring 3 and a spring 32 is installed. The head of the spring 32 is threadedly connected to the rotation groove, and the tail of the spring 32 is fixedly connected to the mounting ring 33. When the cylinder 2 rotates, the head of the spring 32 moves along the rotation groove, so that the bottom of the No. 1 rod 44 is close to or away from the top surface of the mounting ring 33; the limiting ring 35 is located at the top of the cylinder 2 and is threadedly connected to the outer side of the sampling shell 1, wherein the shape of the cylinder 2 is set to be annular, and the inner side of the top port of the cylinder 2 is fixedly connected with The second ring 4 is also fixedly connected to the inner side of the bottom port of the cylinder 2. The second ring 4 is symmetrically arranged, wherein a movable block 42 is installed inside the cylinder 2, and a plurality of raised blocks 43 are fixedly connected to the outer side of the movable block 42. The plurality of raised blocks 43 are evenly arranged around the movable block 42. Initially, the raised parts of the upper and lower edges of the raised blocks 43 are stuck between the second ring 4. A plurality of first grooves 41 are opened on the surface of the second ring 4. If the cylinder 2 is rotated to move the raised parts of the raised blocks 43 between the upper and lower first grooves 41, the cylinder 2 can be moved to separate the movable block 42 from the cylinder 2;
[0028] like Figure 1 As shown, a symmetrical pedal 21 is detachably connected to the outside of the cylinder 2. The first part of the pedal 21 is set in a plate shape to increase the contact area between the pedal 21 and the user's hands or feet and reduce the slipping situation. At the same time, the existing cylinder device can be detachably installed at the bottom of the first part of the pedal 21. If the sampling device is inserted too deeply, it is difficult for human power to pull out the sampling device through the pedal 21. The existing cylinder device can be pre-installed at the bottom of the pedal 21, and the base of the cylinder device is in contact with the ground. The motor in the cylinder device drives the cylinder to start, so that the cylinder moves upward and drives the entire sampling shell 1 upward through the pedal 21 until the sampling shell 1 and the surrounding soil are loose, wherein the looseness allows the sampling shell 1 to be easily pulled out of the soil by human power;
[0029] like Figure 1-Figure 3 As shown and Figure 7As shown, multiple No. 2 grooves 13 are opened on the outside of the sampling shell 1. When the movable block 42 moves up and down, the raised block 43 is slidably connected in the No. 2 groove 13 at the upper shell. The No. 1 rod 44 is detachable from the bottom axis of the cylinder 2. The tail of the No. 1 rod 44 sequentially passes through multiple circular plates 45. A plurality of guide plates 5 are rotatably connected to the upper surface of each circular plate 45. The plurality of guide plates 5 are evenly arranged around the circular plate 45. The inner side of the guide plate 5 is set as an inclined surface. The thickness of the top of the guide plate 5 is less than the thickness of the bottom of the guide plate 5. The slide groove 51 is opened on the inner surface of the guide plate 5. The slide groove 51 is slidably connected with a connecting rod 52. The tail of the connecting rod 52 is detachably connected to the outer surface of the No. 1 rod 44. When the No. 1 rod 44 drives the connecting rod 52 to move downward, the first part of the connecting rod 52 will move along the slide groove 51, so that the bottom of the guide plate 5 rotates around the circular plate 45, so that the multiple guide plates 5 are opened outward, wherein the pad 15 is located in the No. 2 groove 13 and multiple pads are provided, and both ends of the pad 15 are connected to the outside of the sampling shell 1, and the upper surface of the pad 15 is in contact with the bottom of the guide plate 5, so as to support the position of the circular plate 45 in the lower shell, and the guide plate 5 is located in the No. 2 groove 13, wherein the multiple guide plates 5, part of the inner side of the lower shell and the circular plate 45 form a block space, and the entire lower shell is provided with multiple block spaces, and the block spaces are used to place soil layers of different depths;
[0030] like Figure 1 and Figure 7 As shown, the guide plates 5 at different layers are mutually pulled by the No. 1 rod 44 and the connecting rod 52. If the sampling shell 1 is just inserted into the soil, in the absence of other external forces, the squeezing of the surrounding soil limits the deviation of the guide plate 5 at the bottom layer of the sampling shell 1. The guide plate 5 at this location limits the movement of the guide plates 5 at other positions through the connecting rod 52 and the No. 1 rod 44, so that the movable block 42 remains suspended in the sampling shell 1; if the cylinder 2 drives the movable block 42 to move downward, the movable block 42 drives the guide plate 5 to open outward through the No. 1 rod 44 and the connecting plate. During the opening process of the guide plate 5, the guide plate 5 pushes the adjacent soil downward and simultaneously pushes the surrounding soil layers into the stratified space, wherein the adjacent soil is the soil formed by the axial flow and mixing of the upper and lower soil layers driven by the insertion of the sampling shell 1, so that the adjacent soil is away from the stratified space port, which is conducive to improving the originality of the material distribution in the soil layers of different depths.
[0031] like Figure 1 and Figure 7As shown, an elastic membrane 6 can be fixedly connected between adjacent guide plates 5. Initially, the elastic membrane 6 is sleeved on the outside of the sampling shell 1, and the elastic mold is flush with the outer surface of the sampling shell 1. When the guide plate 5 rotates, the length of the elastic membrane 6 changes with the rotation of the guide plate 5 and is in tension, so as to increase the contact area between the guide plate 5 and the adjacent soil. Two elastic steel rods 61 are respectively wrapped around the upper and lower ends of the elastic membrane 6 to support the upper and lower ends of the elastic mold to be parallel, thereby reducing the collapse in the middle of the upper end or the lower end of the elastic membrane 6. When the guide plate 5 rotates outward, the guide plate 5 drives the elastic membrane 6 to rotate synchronously, and the guide plate 5 and the elastic steel rod 61 push the adjacent soil downward to move the adjacent soil away from the stratified space port. When the guide plate 5 closes the stratified space port, the elastic membrane 6 fits with the sampling shell 1, and the upper and lower ends of the elastic membrane 6 are not connected to the outer surface of the sampling shell 1, so the upper and lower ends of the elastic mold are openings, and the soil in the elastic membrane 6 will flow out through the openings as it fits upward or downward, thereby reducing the amount of soil residue inside the elastic mold.
[0032] like Figure 1-Figure 2 As shown, a plurality of thread grooves 12 are evenly coiled on the outside of the sampling shell 1, and the inner sides of the mounting ring 33 and the limiting ring 35 are threadedly connected with the thread groove 12. The positions of the mounting ring 33 and the limiting ring 35 can be changed to change the position of the entire cylinder 2 on the sampling shell 1. At the same time, the No. 1 rod 44 is set as a telescopic rod and cooperates with the cylinder 2 to ensure that the sampling work is carried out normally. The portion of the sampling shell 1 below the mounting ring 33 is the length that can be inserted into the soil. If the position of the mounting ring 33 is changed, the length that can be inserted into the soil can be changed, so that it is suitable for sampling soil layers of different depths, which is beneficial to improving the practicality of the sampling device.
[0033] like Figure 1-Figure 3 As shown, a reinforcing plate 7 can be fixedly connected to the middle part of the sampling shell 1 to improve the structural strength of the sampling shell 1. At the same time, the segmented part of the sampling shell 1 can be set at the reinforcing plate 7, and a protective film 71 can be set on the outside of the reinforcing plate 7. Specifically, the end of the protective film 71 is fixedly connected to the outer surface of the sampling shell 1, wherein the end of the protective film 71 is located at the lowest end of the upper shell, and does not affect the segmentation of the upper shell and the lower shell; a connecting ring 72 is fixedly connected to the tail of the protective film 71, and the top of the connecting ring 72 is rotatably connected to the groove on the bottom surface of the mounting ring 33. The protective film 71 is set to a rubber material and is sleeved on the outside of the sampling shell 1. Specifically, when the mounting ring 33 moves, the protective film 71 wraps the threaded groove 12, thereby reducing the amount of soil remaining in the threaded groove 12 and entering the upper shell through the No. 2 groove 13, which is convenient for the user to clean the sampling device.
[0034] like Figure 1-Figure 2 As shown and Figure 7As shown, a plurality of detachable fixing plates 53 can be arranged on the upper surface of the circular plate 45, and the edge of the fixing plate 53 is rotatably connected to the bottom of the guide plate 5, so as to facilitate the assembly and disassembly of the plurality of guide plates 5 and the fixing plates 53. At the same time, a torsion spring is installed at the rotation point of the guide plate 5 and the fixing plate 53, and the torsion spring makes the guide plate 5 tend to rotate toward the axis of the circular plate 45, thereby reducing the shaking of the guide plate 5 and the movable block 42 at the beginning. At the same time, a third groove 14 is opened on the outside of the sampling shell 1, and four third grooves 14 are evenly distributed as a group around the axis of the sampling shell 1. There are multiple groups of pads 15 on the outside of the body 1, which are snap-fitted with the No. 3 groove 14, wherein a notch can be opened at the top of the slide 51. When unloading, the pad 15 can be moved and the tip block can be removed, and the movable block 42 can be rotated by the pedal 21, so that the movable block 42 drives the connecting rod 52 to slide out of the notch at the top of the slide 51 through the No. 1 rod 44, and then pushes the guide plates of different layers toward the tail of the sampling shell 1 in turn, and the circular plate 45 carries the soil to slide out of the sampling shell 1, so as to obtain soil layers of different depths, which is conducive to improving the convenience of obtaining samples.
[0035] like Figure 3-Figure 6 As shown, a plurality of L-shaped plates 31 may also be provided, the L-shaped plates 31 being evenly distributed at the bottom of the No. 1 ring 3, the top surface length of the L-shaped plates 31 being shorter than the bottom surface length, the top surface of the L-shaped plates 31 being fixed to the bottom of the No. 1 ring 3, and the mounting ring 33 being provided with a plurality of No. 4 grooves 34, the No. 4 grooves 34 being engaged with the L-shaped plates 31, and initially, the bottom of the L-shaped plates 31 does not extend into the No. 4 grooves 34, when the cylinder 2 moves and causes the guide plate 5 to open outward, the L-shaped plates 31 extend into the No. 4 grooves 34, and then the cylinder 2 is rotated so that the bottom of the L-shaped plates 31 passes through the No. 4 grooves 34 and the protruding part of the bottom surface contacts the bottom surface of the mounting plate, so that the guide plate 5 can be kept open, the sampling shell 1 is lifted upward and then reset, so that the L-shaped plates 31 are separated from the No. 4 grooves 34, thereby accelerating the speed at which the soil layer merges into the stratified space, and reducing the speed at which the mixed soil layer enters the stratified space, wherein the raised block 43 of the movable block 42 does not move between the upper and lower No. 1 grooves 41.
[0036] It should be noted that the present invention is a sampling device for wetland soil layers, such as Figure 1-Figure 7As shown, when in use, mark the sampling point on the wetland soil to be measured, align the pointed cone block 11 with the sampling point and insert it, and push the top of the sampling device with both hands. After the bottom of the sampling device is inserted into the soil for a certain distance, push the pedal 21 to rotate the cylinder 2 so that the raised block 43 is located between the upper and lower grooves 41, and then step on the pedal 21, the cylinder 2 presses the spring 32 downward and drives the entire sampling shell 1 to move downward with the help of the mounting ring 33. When the sampling device moves to a specified depth, release the pedal 21 and the cylinder 2 is reset, rotate the cylinder 2 so that the raised block 43 is located between the upper and lower rings 4, and then push the pedal 21 by hand. The pedal 21 is driven by the cylinder 2 The movable block 42 is moved, and the movable block 42 drives the connecting rod 52 to move along the slide groove 51 through the No. 1 rod 44, so that the bottom of the guide plate 5 is opened outward around the circular plate 45, pushing the adjacent soil and making the surrounding soil merge into the stratified space. After merging, the pedal 21 is moved upward, the guide plate 5 is fitted with the sampling shell 1, and the top of the cylinder 2 is in contact with the limit ring 35. The pedal 21 is continuously lifted to separate the entire sampling shell 1 from the soil. The sampling device and the soil can also be loosened with the help of a cylinder device, and then the sampling device is pulled out of the soil by hand, and finally the tip block is removed, and soil layer samples of different depths are taken out from the tail of the sampling shell 1 in turn.
[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A sampling device for wetland soil layers, characterized in that: The sampling housing (1) comprises a sampling shell (1), wherein a pointed cone block (11) is detachably connected to the bottom of the sampling shell (1), a cylinder (2) is sleeved on the outside of the top of the sampling shell (1), a symmetrical pedal (21) is detachably connected to the outer surface of the cylinder (2), a No. 1 ring (3) is fixedly connected to the bottom surface of the cylinder (2), a spring (32) is threadedly connected to the inner side of the No. 1 ring (3), a mounting ring (33) is fixedly connected to the tail of the spring (32), the inner side of the mounting ring (33) is threadedly connected to the surface of the sampling shell (1), a limiting ring (35) is arranged on the top of the cylinder (2), a symmetrical No. 2 ring (4) is fixedly connected to the inner side of the cylinder (2), a plurality of No. 1 grooves (41) are provided on the surface of the No. 2 ring (4), and the No. 1 ring (4) is threadedly connected to the inner side of the cylinder (2). A movable block (42) is installed inside the cylinder (2), and a plurality of protruding blocks (43) are fixedly connected to the outer surface of the movable block (42). A plurality of No. 2 grooves (13) are provided on the outer surface of the sampling shell (1), and the protruding blocks (43) are engaged with the No. 2 grooves (13). A No. 1 rod (44) is detachably connected to the axis of the bottom of the cylinder (2), and a plurality of circular plates (45) are slidably connected to the surface of the No. 1 rod (44). A plurality of guide plates (5) are rotatably connected to the edge of the circular plate (45), and the inner side of the guide plate (5) is set as an inclined surface and provided with a slide groove (51), and a connecting rod (52) is slidably connected inside the slide groove (51), and a plurality of pads (15) are provided at the outer edge of the circular plate (45).
2. A sampling device for wetland soil layers according to claim 1, characterized in that: An elastic membrane (6) is fixedly connected between the guide plates (5), and the elastic membrane (6) is sleeved on the outside of the sampling shell (1). The upper and lower ends of the elastic membrane (6) are sleeved with elastic steel rods (61), and the ends of the elastic steel rods (61) are slidably connected inside the guide plates (5).
3. A sampling device for wetland soil layers according to claim 1, characterized in that: The outer surface of the sampling housing (1) is provided with a plurality of thread grooves (12), and the inner sides of the mounting ring (33) and the limiting ring (35) are both engaged with the thread grooves (12).
4. A sampling device for wetland soil layers according to claim 3, characterized in that: A reinforcing plate (7) is fixedly connected to the middle portion of the sampling housing (1), a protective film (71) is arranged on the outside of the reinforcing plate (7), a connecting ring (72) is fixedly connected to the tail of the protective film (71), and the connecting ring (72) is rotatably connected to the bottom surface of the mounting ring (33).
5. The sampling device for wetland soil layer according to claim 1, characterized in that: The upper surface of the circular plate (45) is detachably connected to a fixing plate (53), and the fixing plate (53) is rotatably connected to the bottom of the guide plate (5). The outer surface of the sampling housing (1) is provided with a plurality of No. 3 grooves (14), and the end of the pad (15) is engaged with the No. 3 grooves (14).
6. A sampling device for wetland soil layers according to claim 1, characterized in that: A plurality of L-shaped plates (31) are fixedly connected to the bottom of the No. 1 ring (3), a plurality of No. 4 grooves (34) are formed on the outer surface of the mounting ring (33), and the L-shaped plates (31) are engaged with the No. 4 grooves (34).