Multistage self-adaptive stratified sampling device for lake bottom mud

Abstract

The invention discloses a multistage self-adaptive stratified sampling device for lake bottom mud, which belongs to the technical field of sludge sampling and comprises a direction-adjusting chassis, and an attaching mechanism is mounted at the bottom of the direction-adjusting chassis. According to the device, through the designed attaching mechanism, the direction adjusting chassis can make contact with lake bottom sludge through a plurality of attaching parts at the bottom, a plurality of attaching teeth at the bottoms of the attaching parts can be fully attached to the sludge, and the contact friction strength with the lake bottom is enhanced; the air pump can drive the direction-adjusting air bag to expand when working and extending, the direction-adjusting air bag can drive the universal balls on the two sides to rotate in the ball bearings at the corresponding positions when being expanded, the angle of the slope bottom is fully matched through adjustment of the expansion angle of the direction-adjusting air bag on the two sides, and the bottom extending pipe can be aligned with the lake bottom to accurately sample through rotation of the direction-adjusting balls in the direction-adjusting base plate. The trafficability of the flexible extension pipe at the lake bottom is ensured, angle centering is carried out after deposition, and the sampling precision is improved.

Description

Technical Field

[0001] This invention belongs to the field of silt sampling technology, and particularly relates to a multi-level adaptive stratification sampling device for lake bottom sediment. Background Technology

[0002] Sediment sampling refers to the collection of sediment samples in order to study the accumulation, distribution, transformation and migration patterns of pollutants discharged into water bodies. When sampling lake sediments, a sampler is generally required to be inserted deep into the lake bottom for sampling.

[0003] Chinese invention patent CN115389253B discloses a lake sediment collection device for deployment on a ship. It includes a lifting device, a sampling rod, a cylindrical sampling body, and a sampling head connected in sequence. The cylindrical sampling body has a downward-opening collection cavity. The sampling head has a collection channel that communicates with the collection cavity. A valve plate and a rotating component are installed within the collection channel. The rotating component drives the valve plate to rotate within the collection channel to have a first working position corresponding to the insertion process of the sampling head and a second working position corresponding to the sampling process of the sampling head. In the first working position, the valve plate is parallel to the axial section of the cylindrical sampling body. In the second working position, the valve plate forms a blocking angle with the axial section of the cylindrical sampling body. The lake sediment collection device provided by the above solution can prevent the sample from falling during the rising sampling process, ensure the amount of sediment collected each time, and reduce the number of sampling times. However, in actual use, due to the slope of the lake sediment, the sampling tube is prone to have a sampling angle with the lake bottom, which affects the insertion sampling effect. In addition, in order to avoid cross-contamination of sediment samples, it is necessary to repeatedly sample, so there is room for improvement. Summary of the Invention

[0004] The purpose of this invention is to solve the problems that the sampling tube may have a sampling angle with the lake bottom, which affects the insertion sampling effect, and that repeated sampling is required to avoid cross-contamination of silt samples. Therefore, a multi-level adaptive stratified sampling device for lake bottom sediment is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-stage adaptive stratification sampling device for lake bottom sediment includes an adjusting chassis. A fitting mechanism is installed at the bottom of the adjusting chassis, and adjusting mechanisms are installed on both sides of the top of the fitting mechanism. The fitting angle between the fitting mechanism and the lake bottom is adjusted by adjusting the adjusting mechanism. An adjusting ball is rotatably connected inside the adjusting chassis. An extension tube is inserted inside the adjusting ball. An equipment box is installed at the top of the extension tube. The equipment box is installed inside an external water-walking device.

[0007] A control mechanism is installed on the top of the steering chassis, and the inner side of the control mechanism is in contact with the outer side of the steering ball. The relative angle between the steering ball and the extension tube is controlled by the control mechanism. A sample storage mechanism is connected to the outer side of the extension tube. A sample outlet is opened on the side of the extension tube corresponding to the sample storage mechanism. The sampled bottom mud is stored through the sample storage mechanism.

[0008] As a further description of the above technical solution:

[0009] The bonding mechanism includes an adjusting ring, and multiple bonding parts are slidably connected to the bottom of the adjusting ring to bond with the silt and gravel on the lake bottom.

[0010] As a further description of the above technical solution:

[0011] The top of the fitting part is connected to a slide rod, which is slidably connected to a sliding hole opened around the top of the directional ring along the axis. The end of the slide rod is connected to a stepped block, and a first spring is sleeved on the outside of the slide rod. The two ends of the first spring are respectively connected to the stepped block and one side of the directional ring at corresponding positions.

[0012] As a further description of the above technical solution:

[0013] The bottom of the bonding part is connected to multiple bonding teeth, which are conical teeth.

[0014] As a further description of the above technical solution:

[0015] The steering mechanism includes a steering airbag, with universal balls connected to both sides of the steering airbag. The universal balls are covered with ball bearings, which are connected to the steering ring and the steering chassis at corresponding positions on opposite sides. A connecting air pipe is connected to one side of the steering airbag, and the connecting air pipe extends into the equipment box and connects to the internal air pump.

[0016] As a further description of the above technical solution:

[0017] The sample storage mechanism includes a sample storage box connected to the outside of the extension tube. A turntable is installed inside the sample storage box via a drive unit. Multiple sample storage seats are equidistantly connected to the top of the turntable along the axis. A protective shell is connected to one side of the extension tube. A fixing plate is installed inside the protective shell. An electric push rod is connected to one side of the fixing plate. A push plate is connected to one end of the telescopic part of the electric push rod. A first magnetic block is connected to the top of the push plate. The sample storage seat is filled with a sampling cylinder. The push plate corresponds to the side of the sample outlet. A telescopic cylinder is installed inside the extension tube, and a third magnetic block is connected to the bottom of the telescopic cylinder.

[0018] As a further description of the above technical solution:

[0019] The bottom of the sampling tube is connected to a second magnetic block, and multiple overflow holes are opened on the outer periphery of the top of the sampling tube.

[0020] As a further description of the above technical solution:

[0021] The top of the sample storage box is rotatably connected to a cover plate. By opening the cover plate, the sampling tube inside the sample storage seat can be sampled. The sample storage seat has a U-shaped cross-section, and multiple filling pads are connected to both sides of the inner cavity of the sample storage seat.

[0022] As a further description of the above technical solution:

[0023] The control mechanism includes a control motor connected to the top of the steering chassis. One end of the output shaft of the control motor is connected to a drive gear. A driven gear ring meshes with one side of the drive gear. Multiple protrusions are equidistantly connected along the axis in the inner cavity of the driven gear ring. A wedge block contacts one side of each protrusion. The wedge block is slidably connected to a groove opened in the top of the steering chassis. A guide rod is connected to one side of the wedge block. The guide rod passes through a sliding hole opened in the inner cavity of the groove. An arc-shaped locking tooth is connected to the other end of the guide rod. The wedge block drives the arc-shaped locking tooth to limit the rotation of the steering ball.

[0024] As a further description of the above technical solution:

[0025] The guide rod is fitted with a second spring, and the two ends of the second spring are respectively connected to the corresponding positions on one side of the wedge block and the inner cavity of the groove.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. In this invention, through the designed bonding mechanism, the directional chassis can contact the lake bottom silt through multiple bonding parts at the bottom. The multiple bonding teeth at the bottom of the bonding parts can fully bond with the silt, enhancing the contact friction strength with the lake bottom. When the lake bottom has a slope, the air pump in the equipment box works, and the extension of the air pump can drive the directional airbag to unfold. The unfolding of the directional airbag can drive the universal balls on both sides to rotate in the ball bearings at the corresponding positions. The adjustment of the unfolding angle of the directional airbags on both sides can fully match the slope angle. The rotation of the directional balls in the directional chassis can make the bottom extension tube accurately sample the lake bottom, which is beneficial to ensure the passage of the flexible extension tube on the lake bottom. After sedimentation, the angle is centered to improve the sampling accuracy.

[0028] 2. In this invention, the designed sample storage mechanism uses a telescopic cylinder to extend and drive the third magnetic block to attract the second magnetic block. After the telescopic cylinder continues to extend, it can drive the sampling tube to move downward and extend from the bottom opening of the extension tube to insert and sample the sludge. After the sampling is fully inserted, the telescopic cylinder retracts and pulls the sampling tube back to its original position. Then, the electric push rod extends and pushes the sampling tube into the corresponding sample storage seat. The rotation of the internal turntable can move different sample storage seats to the sample outlet side for stratified sampling. This is beneficial for separating the samples with different sampling tubes after sampling, avoiding sample mixing and affecting the sampling process in different areas and stratified conditions.

[0029] 3. In this invention, the designed control mechanism can drive the drive gear to rotate by controlling the output shaft of the motor. The rotation of the drive gear can drive the driven gear ring to rotate. The rotation of the driven gear ring can drive the inner protrusion to squeeze the wedge block. The squeezed wedge block can drive the guide rod to slide. The sliding of the guide rod can drive the end arc-shaped locking tooth to fully limit the directional ball. By limiting the directional ball, the relative angle between the extension tube and the directional ball and the directional chassis can be adjusted. This makes it convenient for the directional chassis to limit the relative angle after adjusting the angle around the directional ball. It also makes it convenient to control the centering angle of the extension tube by adjusting the angle of the directional chassis. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a multi-stage adaptive stratification sampling device for lake sediment proposed in this invention.

[0031] Figure 2 This is a schematic diagram of the disassembled structure of a multi-stage adaptive stratified sampling device for lake sediment proposed in this invention;

[0032] Figure 3 The present invention proposes Figure 2 Enlarged structural diagram of part A in the middle;

[0033] Figure 4 This is a schematic diagram of the overall structure of the bonding mechanism of a multi-stage adaptive stratification sampling device for lake sediment proposed in this invention;

[0034] Figure 5 This is a schematic diagram of the overall structure of the sample storage mechanism of a multi-stage adaptive stratified sampling device for lake sediment proposed in this invention;

[0035] Figure 6 This is a schematic diagram of the lateral part of a multi-stage adaptive stratification sampling device for lake sediment proposed in this invention;

[0036] Figure 7 This is a schematic diagram of the transverse structure of a multi-stage adaptive stratification sampling device for lake sediment proposed in this invention;

[0037] Figure 8 This is a schematic diagram of the overall structure of the sampling cylinder of a multi-stage adaptive stratification sampling device for lake sediment proposed in this invention;

[0038] Figure 9 This is a schematic diagram of the pusher plate structure of a multi-stage adaptive stratified sampling device for lake sediment proposed in this invention.

[0039] Legend:

[0040] 1. Alignment chassis; 2. Fitting mechanism; 201. Alignment ring; 202. Fitting part; 203. Fitting teeth; 204. Slide rod; 205. First spring; 3. Alignment ball; 4. Sample storage mechanism; 401. Sample storage box; 402. Sample storage seat; 403. Filling pad; 404. Protective shell; 405. Fixing plate; 406. Electric push rod; 407. Push plate; 408. First magnetic block; 5. Equipment box; 6. 601. Control mechanism; 602. Drive gear; 603. Driven gear ring; 604. Protrusion; 605. Wedge; 606. Guide rod; 607. Second spring; 608. Arc-shaped locking tooth; 7. Orientation mechanism; 701. Orientation airbag; 702. Universal ball; 703. Connecting air pipe; 704. Ball bearing; 8. Sampling tube; 9. Second magnetic block; 10. Overflow hole; 11. Extension tube. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Please see Figures 1-9 The present invention provides a technical solution: a multi-level adaptive stratification sampling device for lake bottom sediment, including a directional chassis 1, a bonding mechanism 2 installed at the bottom of the directional chassis 1, and directional mechanisms 7 installed on both sides of the top of the bonding mechanism 2. The bonding angle between the bonding mechanism 2 and the lake bottom is adjusted by the directional mechanisms 7. A directional ball 3 is rotatably connected inside the directional chassis 1. An extension tube 11 is inserted inside the directional ball 3. An equipment box 5 is installed on the top of the extension tube 11. The equipment box 5 is installed inside an external water walking device.

[0043] A control mechanism 6 is installed on the top of the steering chassis 1, and the inner side of the control mechanism 6 is in contact with the outer side of the steering ball 3. The relative angle between the steering ball 3 and the extension tube 11 is controlled by the control mechanism 6. A sample storage mechanism 4 is connected to the outer side of the extension tube 11. A sample outlet hole is opened on the side of the extension tube 11 corresponding to the sample storage mechanism 4. The sampled bottom mud is stored through the sample storage mechanism 4.

[0044] The bonding mechanism 2 includes an adjusting ring 201, and a plurality of bonding parts 202 are slidably connected to the bottom of the adjusting ring 201, which bond to the silt and gravel at the bottom of the lake through the bonding parts 202;

[0045] The top of the fitting part 202 is connected to a slide rod 204. The slide rod 204 is slidably connected to a sliding hole opened around the top of the directional ring 201 along the axis. The end of the slide rod 204 is connected to a stepped block. A first spring 205 is sleeved on the outside of the slide rod 204. The two ends of the first spring 205 are respectively connected to the stepped block and the corresponding position on one side of the directional ring 201.

[0046] The bottom of the bonding part 202 is connected to a plurality of bonding teeth 203, and the bonding teeth 203 are tapered teeth;

[0047] The steering mechanism 7 includes a steering airbag 701. Both sides of the steering airbag 701 are connected to universal balls 702. The universal balls 702 are covered with ball bearings 704. The ball bearings 704 are connected to the corresponding positions on the opposite side of the steering ring 201 and the steering chassis 1. One side of the steering airbag 701 is connected to a connecting air pipe 703. The connecting air pipe 703 extends into the equipment box 5 and is connected to the internal air pump.

[0048] Specifically, through the designed fitting mechanism 2, when the directional chassis 1 falls to the bottom of the lake, the directional chassis 1 can contact the lake bottom silt through multiple fitting parts 202 at the bottom. The multiple fitting teeth 203 at the bottom of the fitting parts 202 can fully fit the silt, thereby enhancing the contact friction strength with the lake bottom and preventing the fitting mechanism 2 and the top directional chassis 1 from shifting. When the lake bottom has a slope, the air pump in the equipment box 5 can work. The extension of the air pump can drive the directional airbag 701 to unfold. The unfolding of the directional airbag 701 can drive the universal balls 702 on both sides to rotate in the ball bearings 704 at the corresponding positions. Thus, by adjusting the unfolding angle of the directional airbags 701 on both sides, the slope angle can be fully matched. Furthermore, the rotation of the directional ball 3 in the directional chassis 1 allows the bottom extension tube 11 to be aligned with the lake bottom for precise sampling. This helps ensure the passage of the flexible extension tube 11 on the lake bottom and improves the sampling accuracy by centering the angle after sedimentation.

[0049] The sample storage mechanism 4 includes a sample storage box 401, which is connected to the outside of the extension tube 11. A turntable is installed in the inner cavity of the sample storage box 401 via a drive unit. Multiple sample storage seats 402 are equidistantly connected to the top of the turntable along the axis. A protective shell 404 is connected to one side of the extension tube 11. A fixing plate 405 is installed in the inner cavity of the protective shell 404. An electric push rod 406 is connected to one side of the fixing plate 405. A push plate 407 is connected to one end of the telescopic part of the electric push rod 406. A first magnetic block 408 is connected to the top of the push plate 407. The inner cavity of the sample storage seat 402 is filled with a sampling cylinder 8. The push plate 407 corresponds to the side of the sample outlet. A telescopic cylinder is installed in the inner cavity of the extension tube 11, and a third magnetic block is connected to the bottom of the telescopic cylinder.

[0050] The bottom of the sampling tube 8 is connected to a second magnetic block 9. Multiple overflow holes 10 are opened on the outer periphery of the top of the sampling tube 8. The top of the sample storage box 401 is rotatably connected to a cover plate. The sampling tube 8 in the sample storage seat 402 can be sampled by opening the cover plate. The sample storage seat 402 has a U-shaped cross section. Multiple filling pads 403 are connected to both sides of the inner cavity of the sample storage seat 402.

[0051] Specifically: Through the designed sample storage mechanism 4, the third magnetic block can be moved to the sample outlet side of the extension tube 11 by the working shortening of the telescopic cylinder. At this time, the electric push rod 406 extends, which can drive the push plate 407 to move into the corresponding sample storage seat 402. The first magnetic block 408 on the top of the push plate 407 magnetically attracts the second magnetic block 9 on the top of the sampling tube 8 for adsorption and gripping. After the electric push rod 406 returns to its original position and drives the sampling tube 8 into the extension tube 11, the first magnetic block 408 is demagnetized by controlling the current. Then, the telescopic cylinder extends, driving the third magnetic block to adsorb the second magnetic block. 9. After the telescopic cylinder extends continuously, it can drive the sampling cylinder 8 to move downward and extend from the bottom opening of the extension tube 11 to insert and sample the sludge. After the sampling is fully inserted, the telescopic cylinder retracts and pulls the sampling cylinder 8 back to its original position. Then, the electric push rod 406 extends and pushes the sampling cylinder 8 into the corresponding sample storage seat 402. The rotation of the internal turntable can drive different sample storage seats 402 to the sample outlet side for stratified sampling. This is beneficial for separating the samples by using different sampling cylinders 8 after sampling, avoiding sample mixing and affecting the sampling process in different areas and stratified conditions.

[0052] Furthermore, the turntable rotates within the sample storage box 401 via a drive unit. The drive unit can be a motor coupled with corresponding gears to drive the turntable to rotate. Both the motor and the gears are installed within the sample storage box 401. This part is known in the art and will not be described further.

[0053] The control mechanism 6 includes a control motor 601, which is connected to the top of the steering chassis 1. One end of the output shaft of the control motor 601 is connected to a drive gear 602. A driven gear ring 603 meshes with one side of the drive gear 602. Multiple protrusions 604 are equidistantly connected along the axis in the inner cavity of the driven gear ring 603. A wedge 605 contacts one side of the protrusion 604. The wedge 605 is slidably connected to a groove opened in the top of the steering chassis 1. A guide rod 606 is connected to one side of the wedge 605. The guide rod 606 passes through a sliding hole opened in the inner cavity of the groove. The other end of the guide rod 606 is connected to an arc-shaped locking tooth 608. The wedge 605 drives the arc-shaped locking tooth 608 to limit the rotation of the steering ball 3.

[0054] The guide rod 606 is fitted with a second spring 607, and the two ends of the second spring 607 are respectively connected to the wedge block 605 and the corresponding position on one side of the inner cavity of the groove.

[0055] Specifically: Through the designed control mechanism 6, the output shaft of the motor 601 can be rotated to drive the drive gear 602 to rotate. The rotation of the drive gear 602 can drive the driven gear ring 603 to rotate. The rotation of the driven gear ring 603 can drive the inner protrusion 604 to press the wedge 605. The wedge 605 being pressed can drive the guide rod 606 to slide. The sliding of the guide rod 606 can drive the end arc-shaped locking tooth 608 to fully limit the adjustment ball 3. Thus, by limiting the adjustment ball 3, the relative angle between the extension tube 11 and the adjustment ball 3 and the adjustment chassis 1 can be adjusted. This makes it convenient for the adjustment chassis 1 to limit the relative angle after adjusting the angle around the adjustment ball 3. It also makes it convenient to control the centering angle of the extension tube 11 by adjusting the angle of the adjustment chassis 1.

[0056] A protective housing should be provided between the drive gear 602 and the driven gear ring 603 to prevent silt from entering the gap and affecting the transmission stability.

[0057] Meanwhile, the second spring 607 can use its own elastic force to keep the guide rod 606 sliding stably in the groove, which helps to avoid the wedge block 605 from shifting and improves the stability of movement.

[0058] Working principle: When in use, after the steering chassis 1 falls into the bottom of the lake, the steering chassis 1 contacts the lake bottom silt through multiple contact parts 202 at the bottom. Multiple contact teeth 203 at the bottom of the contact parts 202 fully contact the silt, enhancing the contact friction strength with the lake bottom and preventing the contact mechanism 2 and the top steering chassis 1 from shifting. When the lake bottom has a slope, the air pump in the equipment box 5 works, and the air pump extends to drive the steering airbag 701 to unfold. The unfolding of the steering airbag 701 drives the universal balls 702 on both sides to rotate in the ball bearings 704 at the corresponding positions. By adjusting the unfolding angle of the steering airbags 701 on both sides, the slope angle is fully matched.

[0059] The telescopic cylinder shortens, causing the third magnetic block to move to the sampling port side of the extension tube 11. At this time, the electric push rod 406 extends, causing the push plate 407 to move to the corresponding sample storage seat 402. The first magnetic block 408 on the top of the push plate 407 magnetically attracts the second magnetic block 9 on the top of the sampling tube 8 for adsorption and grabbing. After the electric push rod 406 resets, the sampling tube 8 enters the extension tube 11. After the first magnetic block 408 is demagnetized by controlling the current, the telescopic cylinder extends, causing the third magnetic block to attract the second magnetic block 9. After the telescopic cylinder continues to extend, the sampling tube 8 moves downward and extends from the bottom opening of the extension tube 11 to insert and sample the sludge. After the sampling is fully inserted, the telescopic cylinder shortens, causing the sampling tube 8 to reset. Then, the electric push rod 406 extends, causing the sampling tube 8 to be pushed into the corresponding sample storage seat 402. The rotation of the internal turntable causes different sample storage seats 402 to move to the sampling port side for stratified sampling.

[0060] By controlling the output shaft of motor 601 to rotate, the drive gear 602 is driven to rotate. The rotation of drive gear 602 drives driven gear ring 603 to rotate. The rotation of driven gear ring 603 drives inner protrusion 604 to press wedge block 605. The wedge block 605 is pressed and drives guide rod 606 to slide. The sliding of guide rod 606 drives end arc-shaped locking tooth 608 to fully limit the adjustment ball 3. By limiting the adjustment ball 3, the relative angle of extension tube 11 and adjustment ball 3 with respect to adjustment chassis 1 is adjusted, so that adjustment chassis 1 can limit the relative angle after adjusting the angle around adjustment ball 3.

[0061] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage adaptive stratification sampling device for lake sediment, comprising an directional chassis (1), characterized in that, The bottom of the steering chassis (1) is equipped with a fitting mechanism (2), and both sides of the top of the fitting mechanism (2) are equipped with steering mechanisms (7). The fitting angle between the fitting mechanism (2) and the lake bottom is adjusted by the steering mechanism (7). A steering ball (3) is rotatably connected inside the steering chassis (1). An extension tube (11) is inserted inside the steering ball (3). An equipment box (5) is installed on the top of the extension tube (11). The equipment box (5) is installed inside the external water walking equipment. The top of the steering chassis (1) is equipped with a control mechanism (6), and the inner side of the control mechanism (6) is in contact with the outer side of the steering ball (3). The relative angle between the steering ball (3) and the extension tube (11) is controlled by the control mechanism (6). The outer side of the extension tube (11) is connected to a sample storage mechanism (4). The side of the extension tube (11) corresponding to the sample storage mechanism (4) has a sample outlet hole. The sampled bottom mud is stored through the sample storage mechanism (4).

2. The multi-stage adaptive stratification sampling device for lake sediment according to claim 1, characterized in that, The bonding mechanism (2) includes a directional ring (201), and a plurality of bonding parts (202) are slidably connected to the bottom of the directional ring (201) to bond with the silt and gravel at the bottom of the lake.

3. The multi-stage adaptive stratification sampling device for lake sediment according to claim 2, characterized in that, The top of the fitting part (202) is connected to a slide rod (204), which is slidably connected to a sliding hole opened around the top of the directional ring (201) along the axis. The end of the slide rod (204) is connected to a stepped block, and a first spring (205) is sleeved on the outside of the slide rod (204). The two ends of the first spring (205) are respectively connected to the stepped block and the corresponding position on one side of the directional ring (201).

4. The multi-stage adaptive stratification sampling device for lake sediment according to claim 2, characterized in that, The bottom of the bonding part (202) is connected to a plurality of bonding teeth (203), and the bonding teeth (203) are conical teeth.

5. The multi-stage adaptive stratification sampling device for lake sediment according to claim 1, characterized in that, The steering mechanism (7) includes a steering airbag (701), and universal balls (702) are connected to both sides of the steering airbag (701). The universal balls (702) are covered with ball bearings (704). The ball bearings (704) are connected to the corresponding positions on the opposite side of the steering ring (201) and the steering chassis (1). A connecting air pipe (703) is connected to one side of the steering airbag (701). The connecting air pipe (703) extends into the equipment box (5) and is connected to the internal air pump.

6. The multi-stage adaptive stratification sampling device for lake sediment according to claim 1, characterized in that, The sample storage mechanism (4) includes a sample storage box (401), which is connected to the outside of the extension tube (11). A turntable is installed in the inner cavity of the sample storage box (401) through a drive unit. Multiple sample storage seats (402) are equidistantly connected to the top of the turntable along the axis. A protective shell (404) is connected to one side of the outside of the extension tube (11). A fixing plate (405) is installed in the inner cavity of the protective shell (404). An electric push rod (406) is connected to one side of the fixing plate (405). A push plate (407) is connected to one end of the telescopic part of the electric push rod (406). A first magnetic block (408) is connected to the top of the push plate (407). The inner cavity of the sample storage seat (402) is filled with a sampling tube (8). The push plate (407) is on the side corresponding to the sample outlet hole. A telescopic cylinder is installed in the inner cavity of the extension tube (11), and a third magnetic block is connected to the bottom of the telescopic cylinder.

7. A multi-stage adaptive stratification sampling device for lake sediment according to claim 6, characterized in that, The bottom of the sampling tube (8) is connected to a second magnetic block (9), and multiple overflow holes (10) are opened on the outer periphery of the top of the sampling tube (8).

8. A multi-stage adaptive stratification sampling device for lake sediment according to claim 6, characterized in that, The top of the sample storage box (401) is rotatably connected to a cover plate. By opening the cover plate, the sampling tube (8) inside the sample storage seat (402) can be sampled. The sample storage seat (402) has a U-shaped cross section and multiple filling pads (403) are connected to both sides of the inner cavity of the sample storage seat (402).

9. A multi-stage adaptive stratification sampling device for lake sediment according to claim 1, characterized in that, The control mechanism (6) includes a control motor (601), which is connected to the top of the steering chassis (1). One end of the output shaft of the control motor (601) is connected to a drive gear (602). A driven gear ring (603) meshes with one side of the drive gear (602). Multiple protrusions (604) are equidistantly connected along the axis in the inner cavity of the driven gear ring (603). A wedge (605) contacts one side of the protrusion (604). The wedge (605) is slidably connected to a groove opened at the top of the steering chassis (1). A guide rod (606) is connected to one side of the wedge (605). The guide rod (606) passes through a sliding hole opened in the inner cavity of the groove. An arc-shaped locking tooth (608) is connected to the other end of the guide rod (606). The arc-shaped locking tooth (608) is driven by the wedge (605) to limit the rotation of the steering ball (3).

10. A multi-stage adaptive stratification sampling device for lake sediment according to claim 9, characterized in that, The guide rod (606) is fitted with a second spring (607), and the two ends of the second spring (607) are respectively connected to the wedge block (605) and the corresponding position on one side of the inner cavity of the groove.

Images