Sampling device for wetland soil

Abstract

The invention discloses a sampling device for wetland soil, and relates to the field of soil sampling. The sampling device for wetland soil comprises a drill bit and a cylinder fixedly connected to the upper portion of the drill bit, circular holes which are annularly and evenly distributed are formed in the surface of the cylinder, rotating columns are installed on the hole walls of the circular holes in a matched mode, and storage grooves are formed in the end faces, away from the interior of the cylinder, of the multiple rotating columns. A mounting groove is formed in the hole wall of the round hole, round grooves are symmetrically formed in the groove wall of the mounting groove, connecting springs are fixedly connected to the groove walls of the round grooves, and connecting rods are fixedly connected to the other ends of the connecting springs; the device can be used for stratified sampling of soil, is simple to operate, can be used for sampling soil on a slope without a worker standing on the surface of the slope for operation, and has a function of removing moisture in a soil sample, so that the working efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the field of soil sampling, and in particular to a sampling device for wetland soil. Background Art

[0002] Wetland soil sampling refers to the process of collecting soil samples from wetland environments. Sampling studies can be used to understand the physical, chemical and biological properties of wetland soils, and to monitor the content of pollutants in wetland soils, such as heavy metals (mercury, cadmium, lead, etc.) and organic pollutants (petroleum, pesticide residues, etc.).

[0003] In the wild wetland environment, when soil sampling is required on both sides of the river, due to the proximity to the river, the terrain gradually lowers and forms a slope. On the slope, the soil usually shows the transition characteristics from wetland to river, with obvious stratification. The top layer is wetland soil rich in organic matter. As it approaches the river, more sandy sediments appear in the lower layer. This is caused by the scouring and sedimentation of river water. When surface soil sampling of the slope is required, if the sampling staff stands on the surface of the slope to operate, there is a risk of falling into the river. If the operation is performed away from the slope, it is difficult to obtain this soil with stratified characteristics, which affects the research on the vertical structure of the soil in the wetland-river ecotone.

[0004] Therefore, it is necessary to propose a sampling device for wetland soil to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a sampling device for wetland soil, which can effectively solve the problems in the background technology.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is:

[0007] A sampling device for wetland soil, comprising a drill bit, a cylinder fixedly connected above the drill bit, the surface of the cylinder is provided with circular holes evenly distributed in an annular shape, the hole walls of the circular holes are cooperated with and installed with rotating columns, the end surfaces of the rotating columns away from the inside of the cylinder are provided with storage grooves, the hole walls of the circular holes are provided with installation grooves, the groove walls of the installation grooves are symmetrically provided with circular grooves, the groove walls of the circular grooves are fixedly connected with a connecting spring, the other end of the connecting spring is fixedly connected with a connecting rod, one end of two connecting rods away from the connecting spring is fixedly connected with a stopper, the stopper is installed in cooperation with the installation groove, the inner wall of the cylinder is located above the multiple circular holes and is fixedly connected with a fixed block, the fixed block is slidably connected with a lifting column, the surface of the lifting column is provided with an adjusting mechanism for adjusting the multiple rotating columns to extend out of the circular holes for wetland soil sampling, the end of the cylinder surface away from the drill bit is symmetrically cooperated with a transmission column, and the outer sides of the two transmission columns are provided with a positioning mechanism for placing and positioning the cylinder and the drill bit.

[0008] Preferably, a transverse groove is symmetrically provided at one end of the cylinder surface close to the top, and the transverse groove is rotatably connected to the transmission column.

[0009] Preferably, the adjusting mechanism comprises a conical block fixedly connected to the surface of the lifting column, the conical blocks are three, a first spring is fixedly connected at the center of the upper surface of the fixed block, one end of the first spring away from the fixed block is fixedly connected to the lifting column, a first spiral groove is provided at one end of the surface of the rotating column away from the storage groove, a strip groove is provided at one end of the groove wall of the first spiral groove close to the circular hole, the strip groove is communicated with the other end of the first spiral groove, the groove wall of the first spiral groove and the groove wall of the strip groove are both equipped with a movable block through a torsion spring, the first spiral groove wall is matched with a first convex block, the inner wall of the cylinder is fixedly connected with arc blocks next to the multiple circular holes, the arc block is fixedly connected to the first convex block, the end surfaces of the multiple rotating columns located inside the cylinder are rotatably connected with the rotating blocks, the surface of the rotating block is fixedly connected with spring plates, and the ends of the multiple spring plates away from the rotating block are fixedly connected to the inner wall of the cylinder;

[0010] The surfaces of the two transmission columns are provided with tooth grooves evenly distributed in an annular shape at one end located inside the cylinder, and a transmission gear is meshed and connected below the tooth groove. The two transmission gears are rotatably connected to the inner wall of the cylinder, and a convex column is fixedly connected to the surface of the transmission gear. A first adjustment block is installed between the two convex columns, and the first adjustment block is fixedly connected to the lifting column;

[0011] A cylinder is fixedly connected to the upper end of the lifting column surface, a second spiral groove is opened on the surface of the cylinder, a second protrusion is mounted on the wall of the second spiral groove, a rotating sleeve is sleeved on the outer side of the cylinder, and the second protrusion is fixedly connected to the inner wall of the rotating sleeve.

[0012] Preferably, grooves are symmetrically provided on the surface of the first adjustment block, and the protruding columns are slidably connected to the grooves.

[0013] Preferably, the positioning mechanism comprises a first circular ring and a second circular ring rotatably connected to the surface of the transmission column, the surface of the first circular ring close to the second circular ring is provided with annular evenly distributed card grooves, wherein three of the card groove walls are carded with card blocks, the card blocks are fixedly connected with movable rods on the surfaces away from the card grooves, the three movable rods are all slidably connected with the second circular ring, a second spring is sleeved on the outer side of the second circular ring, one end of the three movable rods away from the card blocks is fixedly connected with a fixing ring, the fixing ring is sleeved on the outer side of the transmission column, the surface of the fixing ring away from the movable rod is fixedly connected with a first rectangular block, and the surface of the transmission column next to the movable ring is fixedly connected with a second rectangular block;

[0014] The surfaces of the first and second circular rings are symmetrically and fixedly connected with T-shaped columns, and the ends of the two T-shaped columns away from the transmission column are slidably connected with support columns, and the surfaces of the support columns are symmetrically provided with column grooves, and the column grooves are slidably connected with the T-shaped columns, and the ends of the multiple T-shaped columns away from the transmission column are fixedly connected with a third spring, and the lower end of the support column is rotatably connected with a positioning column, and the end of the positioning column away from the support column is conical.

[0015] Preferably, the initial state of the second spring is a stretched state.

[0016] Preferably, a friction block is fixedly connected to the wall of the installation groove, and the friction block is installed in cooperation with a stop block.

[0017] Preferably, the surface of the stopper is equidistantly and fixedly connected with limit strips.

[0018] Compared with the prior art, the present invention provides a sampling device for wetland soil, which has the following beneficial effects:

[0019] 1. The sampling device for wetland soil, before sampling the slope surface, the four support columns are adjusted to one side of the cylinder, two of the four positioning columns are inserted into the ground, the cylinder and the drill bit are inserted into the slope, because the T-shaped column and the column groove can produce relative movement, the drill bit and the cylinder will not have an angle deviation during the insertion of the cylinder and the drill bit into the slope, after the insertion is deep enough, the two support columns are manually adjusted, the second ring rotates with the support column, the fixed ring rotates with the second ring, the first rectangular block cooperates with the second rectangular block, can drive the transmission column to rotate, and then the transmission gear drives, the convex column drives the first adjustment block to move upward, and then drives the lifting column and the conical block to move upward, the rotating column extends out of the round hole, the soil is sampled in layers, the operation is simple, and the slope can be sampled without the staff standing on the slope surface to operate.

[0020] 2. The sampling device for wetland soil, after the cylinder and the drill bit are inserted into the slope to complete soil sampling, when the cylinder and the drill bit are taken out of the soil, the stopper will move in the direction of stretching the connecting spring due to the friction between the stopper and the soil, and block the storage groove. Due to the friction between the stopper and the installation groove, after the cylinder and the drill bit are taken out of the soil, they will not immediately return to the initial state due to the elastic force of the connecting spring. At this time, by rotating the rotating sleeve, the soil sample in the storage groove can be squeezed to remove moisture, so that the entire device has the function of removing moisture from the soil sample, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2The present invention Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 It is a schematic diagram of the overall structure of the present invention from another angle;

[0024] Figure 4 It is a schematic diagram of the partial structure of the rotating column and the conical block of the present invention;

[0025] Figure 5 The present invention Figure 4 Enlarged view of point B in the middle;

[0026] Figure 6 It is a schematic diagram of the partial structure of the rotating column and the cylinder of the present invention;

[0027] Figure 7 The present invention Figure 6 Enlarged view of C1 in the middle;

[0028] Figure 8 The present invention Figure 6 Enlarged view of C2 in the middle;

[0029] Fig. 9 It is a partial structural schematic diagram of the cylinder and the transmission column of the present invention;

[0030] Fig.10 The present invention Fig. 9 Enlarged view of point D in the middle;

[0031] Fig.11 It is a schematic diagram of the local structure of the rotating sleeve and the cylinder of the present invention;

[0032] Fig.12 It is a schematic diagram of the partial structure of the conical block and the lifting column of the present invention;

[0033] Fig.13 The present invention Fig.12 Enlarged view of E1 in the middle;

[0034] Fig.14 The present invention Fig.12 Enlarged view of E2 in the middle.

[0035] In the figure: 1, drill bit; 11, cylinder; 12, stopper; 13, fixed block; 14, lifting column; 15, transmission column; 16, groove; 17, friction block; 18, limit strip; 2, round hole; 3, rotating column; 4, storage slot; 5, installation slot; 6, adjustment mechanism; 61, conical block; 62, first spring; 63, strip groove; 64, first spiral groove; 65, movable block; 66, first convex block; 67, arc block; 68, rotating block; 69, spring piece; 610, tooth groove; 611, transmission gear; 612, convex column; 613, first adjusting block; 614, cylinder; 615, second spiral groove; 616, second protrusion; 617, rotating sleeve; 7, positioning mechanism; 71, first circular ring; 72, second circular ring; 73, slot; 74, block; 75, movable rod; 76, second spring; 77, fixing ring; 78, first rectangular block; 79, second rectangular block; 710, T-shaped column; 711, supporting column; 712, column slot; 713, third spring; 714, positioning column; 8, circular slot; 9, connecting spring; 10, connecting rod. DETAILED DESCRIPTION

[0036] 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.

[0037] See also Figure 1 , Figure 3 , Figure 6 , Figure 8 , Fig. 9 and Fig.10 A sampling device for wetland soil comprises a drill bit 1, a cylinder 11 fixedly connected to the top of the drill bit 1, a surface of the cylinder 11 is provided with circular holes 2 evenly distributed in an annular shape, a rotating column 3 is installed on the hole wall of the circular hole 2, a plurality of rotating columns 3 are provided with a storage groove 4 on the end surface away from the inside of the cylinder 11, a mounting groove 5 is provided on the hole wall of the circular hole 2, a circular groove 8 is symmetrically provided on the groove wall of the mounting groove 5, a connecting spring 9 is fixedly connected to the groove wall of the circular groove 8, a connecting rod 10 is fixedly connected to the other end of the connecting spring 9, and the two connecting rods 10 are away from the connecting spring 9. A stopper 12 is fixedly connected to one end of the spring 9, and the stopper 12 is installed in cooperation with the installation groove 5. A fixing block 13 is fixedly connected to the inner wall of the cylinder 11 above the multiple circular holes 2, and a lifting column 14 is slidably connected in the fixed block 13. An adjusting mechanism 6 for adjusting the multiple rotating columns 3 to extend out of the circular holes 2 for wetland soil sampling is provided on the surface of the lifting column 14. A transmission column 15 is symmetrically installed on one end of the surface of the cylinder 11 away from the drill bit 1, and a positioning mechanism 7 for placing and positioning the cylinder 11 and the drill bit 1 is provided on the outer side of the two transmission columns 15.

[0038] It should be noted that a plurality of vertical grooves are provided on the surface of the lifting column 14, and the vertical grooves are slidably connected to the fixing block 13 to limit the rotation of the lifting column;

[0039] A transverse groove is symmetrically provided at one end of the surface of the cylinder 11 near the top, and the transverse groove is rotatably connected to the transmission column 15 .

[0040] See also Figure 4 , Figure 6 , Figure 7 , Fig. 9 , Fig.11 , Fig.12 , Fig.13 and Fig.14 The adjusting mechanism 6 includes a conical block 61 fixedly connected to the surface of the lifting column 14, and there are three conical blocks 61. A first spring 62 is fixedly connected to the center of the upper surface of the fixed block 13. The end of the first spring 62 away from the fixed block 13 is fixedly connected to the lifting column 14. A first spiral groove 64 is provided on the end of the surface of the rotating column 3 away from the storage groove 4. A strip groove 63 is provided on the end of the groove wall of the first spiral groove 64 close to the circular hole 2. The strip groove 63 is connected to the other end of the first spiral groove 64. The first spiral groove 64 is connected to the first spiral groove 64. The groove wall of the groove 64 and the groove wall of the strip groove 63 are both installed with a movable block 65 through a torsion spring, the groove wall of the first spiral groove 64 is matched with a first protrusion 66, the inner wall of the cylinder 11 is located next to the multiple circular holes 2 and is fixedly connected with an arc block 67, the arc block 67 is fixedly connected to the first protrusion 66, the end surfaces of the multiple rotating columns 3 located inside the cylinder 11 are rotatably connected with a rotating block 68, the surface of the rotating block 68 is fixedly connected with a spring piece 69, and the ends of the multiple spring pieces 69 away from the rotating block 68 are fixedly connected to the inner wall of the cylinder 11;

[0041] It should be noted that, in the process of the cone block 61 and the lifting block being adjusted to move upward, the cone block 61 contacts the surface of the rotating block 68 and the rotating column 3, driving the rotating column 3 to move in the direction away from the inside of the cylinder 11, and a relative movement occurs between the first protrusion 66 and the strip groove 63. Due to the blocking effect of the movable block 65, the first protrusion 66 will not cooperate with the first spiral groove 64 until the first protrusion 66 moves to the other end of the strip groove 63. In this process, the first protrusion 66 contacts the surface of one of the movable blocks 65 and generates a relative movement. The movable block 65 does not form a barrier to the first protrusion 66. When the rotating column 3 contracts to move inside the circular hole 2 under the elastic force of the spring piece 69, due to the blocking of the movable block 65 set in the strip groove 63, the first protrusion 66 will not cooperate with the strip groove 63, and then move along the groove wall of the first spiral groove 64, thereby driving the rotating column 3 to rotate, driving the soil sample placed in the storage groove 4 to shrink into the circular hole 2, and utilizing the elastic force of the spring piece 69 to assist the rotating column 3 to be smoothly reset;

[0042] The surfaces of the two transmission columns 15 are provided with tooth grooves 610 evenly distributed in an annular shape at one end located inside the cylinder 11, and a transmission gear 611 is meshedly connected below the tooth groove 610. The two transmission gears 611 are rotatably connected to the inner wall of the cylinder 11, and a protrusion 612 is fixedly connected to the surface of the transmission gear 611. A first adjustment block 613 is installed between the two protrusions 612, and the first adjustment block 613 is fixedly connected to the lifting column 14;

[0043] It should be noted that when adjusting the rotation of two of the support columns 711 and the T-shaped column 710, the first rectangular block 78 and the second rectangular block 79 can cooperate to drive the transmission column 15 to rotate, and the tooth groove 610 cooperates with the transmission gear 611, and the transmission gear 611 rotates as the transmission column 15 rotates, thereby driving the protruding column 612 to rotate, and the first adjusting block 613 is adjusted to move toward the direction close to the top of the cylinder 11, and the lifting column 14 also moves with the first adjusting block 613, so as to perform soil sampling;

[0044] See also Fig.12 and Fig.14 A cylinder 614 is fixedly connected to the upper end of the surface of the lifting column 14, a second spiral groove 615 is opened on the surface of the cylinder 614, a second convex block 616 is mounted on the groove wall of the second spiral groove 615, a rotating sleeve 617 is sleeved on the outer side of the cylinder 614, and the second convex block 616 is fixedly connected to the inner wall of the rotating sleeve 617;

[0045] It should be noted that after sampling, the drill bit 1 and the cylinder 11 are taken out of the soil, and the rotating sleeve 617 is rotated to cause relative movement between the second protrusion 616 and the second spiral groove 615, thereby driving the cylinder 614 to move away from the top of the cylinder 11, and the lifting column 14 moves with the cylinder 614, and the conical block 61 moves with the lifting column 14, and the conical block 61 and the rotating column 3 move relative to each other. The storage groove 4 cooperates with the block 12 to squeeze the soil sample, thereby removing moisture from the soil, so that the entire device has the function of removing moisture from the soil sample, thereby improving work efficiency.

[0046] See also Figure 7 The surface of the first adjustment block 613 is symmetrically provided with grooves 16, and the boss 612 is slidably connected to the grooves 16;

[0047] It should be noted that the arrangement of the groove 16 enables the movement of the boss 612 to stably drive the first adjustment block 613 to move toward or away from the top of the cylinder 11 .

[0048] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Fig.14 The positioning mechanism 7 includes a first circular ring 71 and a second circular ring 72 rotatably connected to the surface of the transmission column 15. The surface of the first circular ring 71 close to the second circular ring 72 is provided with annular evenly distributed card grooves 73, wherein three card grooves 73 are carded with card blocks 74 on the groove walls, and the card blocks 74 are fixedly connected with movable rods 75 on the surface away from the card grooves 73. The three movable rods 75 are all slidably connected to the second circular ring 72. A second spring 76 is sleeved on the outer side of the second circular ring 72. One end of the three movable rods 75 away from the card blocks 74 is fixedly connected with a fixing ring 77. The fixing ring 77 is sleeved on the outer side of the transmission column 15. The surface of the fixing ring 77 away from the movable rod 75 is fixedly connected with a first rectangular block 78, and the surface of the transmission column 15 is fixedly connected with a second rectangular block 79 located next to the movable ring.

[0049] The surfaces of the first ring 71 and the second ring 72 are symmetrically fixedly connected with T-shaped columns 710, and the ends of the two T-shaped columns 710 away from the transmission column 15 are slidably connected with support columns 711. The surfaces of the support columns 711 are symmetrically provided with column grooves 712, and the column grooves 712 are slidably connected with the T-shaped columns 710. The ends of the multiple T-shaped columns 710 away from the transmission column 15 are fixedly connected with third springs 713, and the lower ends of the support columns 711 are rotatably connected with positioning columns 714, and the ends of the positioning columns 714 away from the support columns 711 are conical;

[0050] It should be noted that after the end of the positioning column 714 away from the support column 711 is inserted into the ground, the drill bit 1 and the cylinder 11 can be positioned before sampling; in the process of soil sampling on the slopes on both sides of the river, it is only necessary to adjust the four support columns 711 to one side of the cylinder 11, and insert two of the positioning columns 714 into the ground for positioning before sampling. The angles between the four support columns 711 and the T-shaped column 710 and the cylinder 11 gradually increase, and the drill bit 1 first contacts the soil on the surface of the slope and then inserts into the slope. The sampler can step on the connection between the positioning column 714 and the support column 711 with one foot, and step on the end of the surface of the support column 711 away from the positioning column 714 with the other foot, adjust the drill bit 1 and the cylinder 11 to slowly insert them into the slope soil, and after they are inserted to a certain depth, hold the positioning column 714 that has not been inserted into the ground with your hand. , adjust the support column 711, the T-shaped column 710 and the second ring 72 to rotate, the first rectangular block 78 contacts the second rectangular block 79, and then can drive the transmission column 15 to rotate, the tooth groove 610 cooperates with the transmission gear 611, the transmission gear 611 rotates as the transmission column 15 rotates, the boss 612 rotates as the transmission gear 611 rotates, the boss 612 cooperates with the groove 16, and can drive the first adjustment block 613 to move toward the top of the cylinder 11, the lifting column 14 moves with the first adjustment block 613, the conical block 61 moves with the lifting column 14, and the rotating column 3 extends out of the circular hole 2 for soil sampling. Since the multiple circular holes 2 are located on the surface of the cylinder 11 with different heights, the soil can be sampled in layers. The operation is simple, and the soil sampling of the slope can be carried out without the staff standing on the slope surface to operate.

[0051] See also Figure 5 , the initial state of the second spring 76 is a stretched state;

[0052] It should be noted that the reaction force generated by the stretching of the second spring 76 acts on the surface of the fixing ring 77, so that the block 74 can be stably matched with the slot 73, so that the adjusted angle between the two support columns 711 can be maintained, thereby facilitating the positioning of the cylinder 11 and the drill bit 1 before sampling.

[0053] See also Figure 8 The groove wall of the mounting groove 5 is fixedly connected with a friction block 17, and the friction block 17 is installed in cooperation with the stopper 12;

[0054] It should be noted that the setting of the friction block 17 can ensure that the stopper 12 will not quickly return to the initial position due to the elastic force of the connecting spring 9 after being adjusted and moved, thereby ensuring that the soil moisture removal operation is carried out smoothly.

[0055] See also Figure 8 , the surface of the stopper 12 is equidistantly fixedly connected to the limit strip 18;

[0056] It should be noted that the setting of the limit strip 18 can increase the friction between the block 12 and the soil, so that when the drill bit 1 and the cylinder 11 are separated from the soil, the block 12 can be adjusted to move and block the storage groove 4, which is convenient for the subsequent removal of moisture from the soil sample.

[0057] 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, comprising a drill bit (1) and a cylinder (11) fixedly connected above the drill bit (1), characterized in that: The surface of the cylinder (11) is provided with circular holes (2) evenly distributed in an annular shape, the hole walls of the circular holes (2) are matched with rotating columns (3) mounted thereon, and the end surfaces of the rotating columns (3) away from the inside of the cylinder (11) are provided with storage grooves (4), the hole walls of the circular holes (2) are provided with mounting grooves (5), the groove walls of the mounting grooves (5) are symmetrically provided with circular grooves (8), the groove walls of the circular grooves (8) are fixedly connected with connecting springs (9), the other end of the connecting springs (9) is fixedly connected with connecting rods (10), and the ends of the two connecting rods (10) away from the connecting springs (9) are fixedly connected with stoppers (12), and the The stopper (12) is installed in cooperation with the installation groove (5); a fixed block (13) is fixedly connected to the inner wall of the cylinder (11) above the plurality of circular holes (2); a lifting column (14) is slidably connected to the inside of the fixed block (13); an adjustment mechanism (6) for adjusting the plurality of rotating columns (3) to extend out of the circular holes (2) for wetland soil sampling is arranged on the surface of the lifting column (14); a transmission column (15) is symmetrically installed at one end of the surface of the cylinder (11) away from the drill bit (1); and a positioning mechanism (7) for placing and positioning the cylinder (11) and the drill bit (1) is arranged on the outer sides of the two transmission columns (15).

2. A sampling device for wetland soil according to claim 1, characterized in that: A transverse groove is symmetrically provided on one end of the surface of the cylinder (11) close to the top, and the transverse groove is rotatably connected to the transmission column (15).

3. A sampling device for wetland soil according to claim 1, characterized in that: The adjusting mechanism (6) comprises a conical block (61) fixedly connected to the surface of the lifting column (14), and there are three conical blocks (61). A first spring (62) is fixedly connected to the center of the upper surface of the fixed block (13), and the end of the first spring (62) away from the fixed block (13) is fixedly connected to the lifting column (14). The end of the surface of the rotating column (3) away from the storage groove (4) is provided with a first spiral groove (64), and the end of the groove wall of the first spiral groove (64) close to the circular hole (2) is provided with a strip groove (63), and the strip groove (63) is connected to the other end of the first spiral groove (64). The first spiral groove The groove wall (64) and the groove wall of the strip groove (63) are both installed with a movable block (65) through a torsion spring, the groove wall of the first spiral groove (64) is cooperatively installed with a first convex block (66), the inner wall of the cylinder (11) is fixedly connected with an arc block (67) located beside the multiple circular holes (2), the arc block (67) is fixedly connected to the first convex block (66), the end surfaces of the multiple rotating columns (3) located inside the cylinder (11) are rotatably connected with a rotating block (68), the surface of the rotating block (68) is fixedly connected with a spring sheet (69), and the ends of the multiple spring sheets (69) away from the rotating block (68) are fixedly connected to the inner wall of the cylinder (11); The surfaces of the two transmission columns (15) are provided with tooth grooves (610) uniformly distributed in an annular shape at one end located inside the cylinder (11); a transmission gear (611) is meshedly connected below the tooth groove (610); the two transmission gears (611) are rotatably connected to the inner wall of the cylinder (11); a convex column (612) is fixedly connected to the surface of the transmission gear (611); a first adjustment block (613) is cooperatively installed between the two convex columns (612); and the first adjustment block (613) is fixedly connected to the lifting column (14); A cylinder (614) is fixedly connected to the upper end of the surface of the lifting column (14); a second spiral groove (615) is provided on the surface of the cylinder (614); a second protrusion (616) is mounted on the groove wall of the second spiral groove (615); a rotating sleeve (617) is sleeved on the outer side of the cylinder (614); and the second protrusion (616) is fixedly connected to the inner wall of the rotating sleeve (617).

4. A sampling device for wetland soil according to claim 3, characterized in that: The surface of the first adjustment block (613) is symmetrically provided with grooves (16), and the protruding column (612) is slidably connected to the grooves (16).

5. A sampling device for wetland soil according to claim 3, characterized in that: The positioning mechanism (7) comprises a first circular ring (71) and a second circular ring (72) which are rotatably connected to the surface of a transmission column (15); a surface of the first circular ring (71) close to the second circular ring (72) is provided with grooves (73) evenly distributed in an annular shape, wherein three groove walls of the grooves (73) are clamped with clamping blocks (74); a surface of the clamping blocks (74) away from the grooves (73) is fixedly connected with movable rods (75); the three movable rods (75) are all slidably connected to the second circular ring (72); a second spring (76) is sleeved on the outer side of the second circular ring (72); one end of the three movable rods (75) away from the clamping blocks (74) is fixedly connected with a fixing ring (77); the fixing ring (77) is sleeved on the outer side of the transmission column (15); a surface of the fixing ring (77) away from the movable rod (75) is fixedly connected with a first rectangular block (78); a second rectangular block (79) is fixedly connected to the surface of the transmission column (15) next to the movable ring; The surfaces of the first circular ring (71) and the second circular ring (72) are both symmetrically and fixedly connected with T-shaped columns (710); the ends of the two T-shaped columns (710) away from the transmission column (15) are slidably connected with support columns (711); the surfaces of the support columns (711) are symmetrically provided with column grooves (712); the column grooves (712) are slidably connected with the T-shaped columns (710); the ends of the multiple T-shaped columns (710) away from the transmission column (15) are all fixedly connected with third springs (713); the lower ends of the support columns (711) are rotatably connected with positioning columns (714); the ends of the positioning columns (714) away from the support columns (711) are conical.

6. A sampling device for wetland soil according to claim 5, characterized in that: The initial state of the second spring (76) is a stretched state.

7. A sampling device for wetland soil according to claim 1, characterized in that: A friction block (17) is fixedly connected to the groove wall of the installation groove (5), and the friction block (17) is installed in cooperation with the stop block (12).

8. A sampling device for wetland soil according to claim 1, characterized in that: The surface of the stopper (12) is fixedly connected with limit strips (18) at equal intervals.

Images