A shallow water column sampler

Abstract

This invention discloses a shallow water columnar sampler, specifically relating to the technical field of underwater sampling equipment. It includes a telescopic column with a ladder base fixedly connected to its bottom end. Two sets of dual-cylinder sampling components are connected to the top of the telescopic column via a fixing mechanism. This invention utilizes the telescopic nature of the telescopic rod and the lever principle formed by the two sets of dual-cylinder sampling components on the telescopic column to successfully achieve balanced force distribution on both ends of the hull during sampling. This significantly improves the stability of the hull and avoids the danger of the hull tilting to one side or even capsizing due to the small size of the hull and the weight of the sampling device. Furthermore, in shallow water areas, the telescopic rod can be detached from the fixing mechanism, rotated, and its length adjusted to directly place the top cavity above the water surface for sampling. Sampling is convenient even when the hull is no longer under stress, greatly improving the flexibility of the device. The structure is simple and efficient.

Description

Technical Field

[0001] This invention relates to the field of underwater sampling equipment technology, specifically to a shallow water columnar sampler. Background Technology

[0002] Currently, underwater sampling technology is quite mature. However, for shallow waters with a depth of less than 10 meters, lagoons with small inlets, intertidal zones or wetlands with a depth of less than 6 meters, and river areas, large ships cannot proceed due to shallow water and complex underwater topography. Therefore, small boats must be used to conduct underwater sampling.

[0003] However, due to the limited load-bearing capacity of small boats, the columnar sampler is subjected to a large amount of gravity and friction between itself and the water during the lifting process. Without a fixed fulcrum, the reaction force will cause the small boat to rock violently, or even capsize. This makes the sampling operation unstable, with high safety risks, difficulty in controlling sampling points, and low sampling efficiency.

[0004] Therefore, a sampler suitable for sampling in shallow water areas is needed that can not only maintain the stability of the hull to improve safety during the sampling process, but also accurately control the sampling point to improve sampling efficiency and reduce the difficulty of sampling operations. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of this invention is to disclose a shallow water columnar sampler to improve the problems of poor hull stability, high safety risks, difficulty in controlling sampling points, and low sampling efficiency caused by the reaction force of the sampling device lifting small boats when sampling in shallow water areas.

[0006] To achieve the above and other related objectives, this invention discloses a shallow water columnar sampler, comprising a telescopic column, a ladder base fixedly connected to the bottom end of the telescopic column, and two sets of dual-cylinder sampling assemblies connected to the top end of the telescopic column via a fixing mechanism. Each dual-cylinder sampling assembly includes a top cavity, which is connected to a core sampling outer cylinder via a connecting chain. Multiple telescopic rods are evenly spaced along the outer wall of the top cavity. A perforation is formed at the center of the top surface of the core sampling outer cylinder. An inner cavity is formed along the side wall of the core sampling outer cylinder, and multiple channels are evenly spaced along the side wall of the core sampling outer cylinder. A... The device has a bottom ring platform. A first pulling rope is fixedly connected to the upper surface of the bottom ring platform at the channel. The first pulling rope passes through the channel and the opening on the bottom surface of the top cavity and is connected to a control mechanism inside the top cavity. A core-taking inner cylinder is set inside the outer core-taking cylinder. A vibration motor is set at the top of the inner core-taking cylinder. The vibration motor is connected to the control mechanism through a second pulling rope passing through the perforation and the bottom surface of the top cavity. A PVC sampling tube is set inside the inner core-taking cylinder. A ring cutter and a petal-shaped sealing ring are set at the bottom of the inner core-taking cylinder. The control mechanism is used to control the release and retraction of the first and second pulling ropes.

[0007] Preferably, the fixing mechanism includes a connecting block disposed at the top of the telescopic column, and one of the telescopic rods of the two sets of dual-cylinder sampling assemblies is inserted into the connecting block and then locked by a pin. The telescopic rod can be rotated and fixed on the top cavity as needed.

[0008] Preferably, the outer wall of the top cavity is provided with multiple stabilizing mechanisms at equal intervals to provide reaction force to maintain the stability of the hull where the device is placed when lifting the outer core cylinder and the inner core cylinder. The stabilizing mechanism includes a wind chamber, a short shaft is rotatably connected to the inner top surface of the wind chamber, a pinion is sleeved on the short shaft, and a fan blade is sleeved on the bottom of the short shaft. The pinion is connected to the control mechanism inside the top cavity through a transmission gear rotatably connected to the inner top surface of the wind chamber.

[0009] Preferably, the inner core cylinder is provided with a fastening and drainage assembly, which includes a spring fixedly connected to the bottom surface of the vibration motor, a top pressure plate fixedly connected to the spring, the top pressure plate sliding up and down against the inner side wall of the inner core cylinder, an inner drainage port at the center of the top pressure plate, and an outer drainage port on the upper side wall of the inner core cylinder.

[0010] Preferably, the inner wall of the core sampling cylinder is provided with a groove, and the groove is slidably connected to a side door. The PVC sampling tube is located between the petal-shaped sealing ring and the top pressure plate.

[0011] Preferably, the bottom surface of the bottom ring platform is fixedly connected with multiple conical anchors, each conical anchor being formed by rotating a half-arrow around a vertical central axis.

[0012] Preferably, the control mechanism includes a power component and a rope-retracting component. The power component includes a first motor and a second motor. The output end of the first motor is connected to a rotating shaft via a first belt. The rotating shaft rotates horizontally on the inner wall of the top cavity. Multiple worm gear sleeves are provided on the rotating shaft. The worm gear sleeves are connected to the rope-retracting component. The rope-retracting component is connected to a double-sided gear. The double-sided gear is rotatably connected inside the top cavity. The output end of the second motor is also fitted with a worm gear sleeve. A rope-retracting component is also provided inside the top cavity next to the opening. The rope-retracting components can be driven by a second belt.

[0013] Preferably, the rope winding assembly includes a rope winding groove rotatably connected to the bottom surface of the top cavity. A worm gear and an internal gear are sleeved on the upper end of the rope winding groove. The worm gear meshes with a worm sleeve. The rope winding assembly is located next to the first pull rope and the second pull rope extending into the top cavity.

[0014] Preferably, the connecting chain is detachable to accommodate underwater sampling at different water depths, and the display screen is connected to the control mechanism inside the top cavity via a cable.

[0015] In summary, the beneficial effects of this invention are as follows:

[0016] 1. By using the telescopic column, telescopic rod, and fixing mechanism, the device leverages the telescopic rod's flexibility and the lever principle formed by the two sets of double-cylinder sampling components on the telescopic column. This successfully achieves balanced force on both ends of the hull during sampling, greatly improving the hull's stability and avoiding the danger of the hull tilting to one side or even capsizing due to the small size of the hull and the weight of the sampling device. Furthermore, in shallow water, the telescopic rod can be detached from the fixing mechanism, rotated, and its length adjusted to directly place the top cavity above the water surface for sampling. Sampling is convenient even when the hull is no longer under stress, greatly improving the device's flexibility. The structure is simple and efficient.

[0017] 2. By using the bottom ring platform, the first pulling rope, and the outer core cylinder, the weight of the bottom ring platform and the sliding of the outer core cylinder on the first pulling rope are utilized to successfully achieve accurate and stable entry of the outer core cylinder into the sampling point, greatly improving sampling efficiency. At the same time, due to the design of the inner cavity, the buoyancy of the outer core cylinder in the water can offset part of the weight of the outer core cylinder, thereby causing the outer core cylinder to fall smoothly into the sampling point, reducing the pulling on the top cavity when the outer core cylinder slides on the first pulling rope, and greatly improving the stability of the hull.

[0018] 3. The stabilization and control mechanisms are designed so that when the outer core cylinder, inner core cylinder, and bottom ring platform are lifted after sampling, the fan blades inside the air chamber start to rotate, providing an upward reaction force. This reduces the probability of the ship capsizing to one side due to the increased resistance caused by the increased weight of the device after sampling, greatly improving the stability of the ship. The structure is ingenious and highly automated.

[0019] 4. The installation of a tight drainage assembly successfully enables the rapid and convenient insertion of a PVC sampling tube into the inner core cylinder, ensuring it adheres tightly to the inner wall of the inner core cylinder. During the descent of the outer core cylinder, impurities in the water have difficulty entering the gap between the inner and outer core cylinders, allowing the inner core cylinder to be easily removed from the outer core cylinder during sampling. Simultaneously, the lubrication of the water flow in the gap improves the efficiency of the inner core cylinder's downward sampling. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an overall structural view of the present invention;

[0022] Figure 2 This is an exploded view of the fixing mechanism in this invention;

[0023] Figure 3 This is a schematic diagram showing the connection between the top cavity and the core extraction outer cylinder in this invention;

[0024] Figure 4 This is a schematic diagram showing the connection between the bottom ring platform and the conical anchor in this invention;

[0025] Figure 5 This is a schematic diagram of the stabilizing mechanism in this invention;

[0026] Figure 6 This is a cross-sectional view of the outer cylinder used for core extraction in this invention;

[0027] Figure 7 This is a schematic diagram of the core-taking inner cylinder in this invention;

[0028] Figure 8 This is a schematic diagram of the interior of the core-taking inner cylinder in this invention;

[0029] Figure 9 This is a cross-sectional view of the core-taking inner cylinder in this invention;

[0030] Figure 10This is a schematic diagram of the control mechanism in this invention;

[0031] Figure 11 This is a schematic diagram of the rope winding assembly in this invention.

[0032] Component designation explanation

[0033] 1. Telescopic column; 101. Ladder base; 102. Connecting block; 103. Pin; 104. Display screen; 2. Top cavity; 201. Telescopic rod; 202. Air chamber; 203. Connecting chain; 204. Through port; 3. Core sampling outer cylinder; 301. Channel; 302. Perforation; 303. Inner cavity; 4. Bottom ring platform; 401. First traction rope; 402. Conical anchor; 5. Core sampling inner cylinder; 501. Vibration motor; 502. Second traction rope; 503. Pulling groove; 504. Side-sliding door; 505, PVC sampling tube; 506, top pressure plate; 507, spring; 508, external drain outlet; 509, internal drain outlet; 6, ring cutter; 601, petal-shaped sealing ring; 7, first motor; 701, first belt; 702, rotating shaft; 703, worm gear sleeve; 704, second belt; 705, second motor; 8, rope winding groove; 801, worm wheel; 802, internal gear; 803, double-sided gear; 804, pinion; 9, short shaft; 901, fan blade. Detailed Implementation

[0034] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0035] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0036] Reference Figure 1 As shown, the present invention discloses a shallow water column sampler, including a telescopic column 1, a ladder base 101 fixedly connected to the bottom end of the telescopic column 1, and two sets of dual-cylinder sampling components connected to the top end of the telescopic column 1 through a fixing mechanism.

[0037] The dual-cylinder sampling assembly includes a top cavity 2, which is connected to a core-sampling outer cylinder 3 via a connecting chain 203. Multiple telescopic rods 201 are evenly spaced along the outer wall of the top cavity 2. (Refer to...) Figure 6 As shown, a through hole 302 is provided at the center of the top surface of the outer core cylinder 3, an inner cavity 303 is provided on the side wall of the outer core cylinder 3, and multiple channels 301 are provided at equal intervals on the side wall of the outer core cylinder 3. A bottom ring platform 4 is provided at the bottom of the outer core cylinder 3. (Refer to...) Figure 3 , Figure 4 and Figure 7 As shown, a first pulling rope 401 is fixedly connected to the upper surface of the bottom ring platform 4 at the orifice 301. The first pulling rope 401 passes through the orifice 301 and the opening 204 on the bottom surface of the top cavity 2, and is connected to a control mechanism inside the top cavity 2. A core-taking inner cylinder 5 is provided inside the outer core-taking cylinder 3. A vibration motor 501 is provided at the top of the inner core-taking cylinder 5. The vibration motor 501 is connected to the control mechanism through a second pulling rope 502 passing through the perforation 302 and the bottom surface of the top cavity 2. It should be noted that after the vibration motor 501 is started, it can cause the inner core-taking cylinder 5 to move downward to take a sample. This is existing technology and will not be described in detail here. A PVC sampling tube 505 is provided inside the inner core-taking cylinder 5. Figure 5 As shown, the bottom of the core sampling inner cylinder 5 is equipped with a ring cutter 6 and a petal-shaped sealing ring 601. It should be noted that the ring cutter 6 facilitates the entry of the core sampling inner cylinder 5 into the underwater soil, and the petal-shaped sealing ring 601 prevents the PVC sampling tube 505 containing the underwater soil sample from falling off during the lifting process, effectively ensuring the integrity of the underwater soil sample. The control mechanism is used to control the raising and lowering of the first pulling rope 401 and the second pulling rope 502.

[0038] It should be noted that the connecting chain 203 can be detached to accommodate underwater sampling at different depths. The display screen 104 is connected to the control mechanism inside the top cavity 2 via a cable. Users can operate the control mechanism and vibration motor 501 on the ship via the display screen 104. It should be noted that the above process is a commonly used existing technology and will not be elaborated on here.

[0039] By utilizing the telescopic column 1, telescopic rod 201, and fixing mechanism, and taking advantage of the telescopic nature of the telescopic rod 201 and the lever principle formed by the two sets of twin-cylinder sampling components on the telescopic column 1, the device successfully achieves balanced force distribution at both ends of the hull during sampling. This significantly improves the stability of the hull and avoids the danger of the hull tilting to one side or even capsizing due to the small size of the hull and the weight of the sampling device. It should be noted that when only the twin-cylinder sampling components on one side of the hull are used, the twin-cylinder sampling components on the other side can act as a counterweight, which is used in conjunction with adjusting the telescopic column. The length of the rod 201 is adjusted to balance the forces on both sides of the hull, thus ensuring the stability of the hull. The length adjustment of the telescopic column 1 and the telescopic rod 201 is existing technology and will not be elaborated on here. At the same time, when sampling in shallow water areas such as shoals, supratidal zones, and intertidal zones, the telescopic rod 201 can be removed from the fixed mechanism, rotated, and its length adjusted. The top cavity 2 can be placed directly on the water surface for sampling. The hull is no longer under stress, yet sampling can still be conveniently performed, greatly improving the flexibility of the device. The structure is simple and efficient.

[0040] By utilizing the bottom ring platform 4, the first traction rope 401, and the outer core cylinder 3, the weight of the bottom ring platform 4 and the sliding of the outer core cylinder 3 on the first traction rope 401 are used to successfully achieve accurate and stable entry of the outer core cylinder 3 into the sampling point, greatly improving sampling efficiency. At the same time, due to the design of the inner cavity 303, the buoyancy of the outer core cylinder 3 in the water can offset part of the weight of the outer core cylinder 3, thereby causing the outer core cylinder 3 to fall into the sampling point smoothly, reducing the pulling of the outer core cylinder 3 on the top cavity 2 when sliding on the first traction rope 401, thus causing the hull to tilt and greatly improving the stability of the hull.

[0041] Reference Figure 2 As shown, in an optional embodiment, the fixing mechanism includes a connecting block 102 disposed at the top of the telescopic column 1. One of the telescopic rods 201 of the two sets of dual-cylinder sampling assemblies is inserted into the connecting block 102 and then locked by a pin 103. The telescopic rod 201 can be rotated and fixed on the top cavity 2 as needed.

[0042] Reference Figure 5 As shown, in an optional embodiment, multiple stabilizing mechanisms are provided at equal intervals on the outer wall of the top cavity 2 to provide reaction force to maintain the stability of the hull where the device is placed when lifting the outer core cylinder 3 and the inner core cylinder 5. The stabilizing mechanism includes a wind cavity 202, a short shaft 9 is rotatably connected to the inner top surface of the wind cavity 202, a pinion 804 is sleeved on the short shaft 9, and a fan blade 901 is sleeved on the bottom of the short shaft 9. The pinion 804 is connected to the control mechanism inside the top cavity 2 through a transmission gear rotatably connected to the inner top surface of the wind cavity 202.

[0043] Reference Figure 10 and Figure 11As shown, in an optional embodiment, the control mechanism includes a power component and a rope-retracting component. The power component includes a first motor 7 and a second motor 705. The output end of the first motor 7 is connected to a rotating shaft 702 via a first belt 701. The rotating shaft 702 rotates horizontally on the inner wall of the top cavity 2. Multiple worm gear sleeves 703 are provided on the rotating shaft 702. The worm gear sleeves 703 are connected to the rope-retracting component. The rope-retracting component is connected to a double-sided gear 803, which rotates inside the top cavity 2. The output end of the second motor 705 is also fitted with a worm sleeve 703. A rope winding assembly is also provided inside the top cavity 2 next to the opening 204. The rope winding assemblies can be driven by the second belt 704. The rope winding assembly includes a rope winding groove 8 rotatably connected to the bottom surface of the top cavity 2. A worm wheel 801 and an internal gear 802 are fitted onto the upper end of the rope winding groove 8. The worm wheel 801 meshes with the worm sleeve 703. The rope winding assembly is located next to where the first pulling rope 401 and the second pulling rope 502 extend into the top cavity 2.

[0044] It should be noted that the stabilization and control mechanisms are designed so that when the outer core cylinder 3, inner core cylinder 5, and bottom ring platform 4 are lifted after sampling, the first motor 7 and the second motor 705 are simultaneously activated, causing the rotating shaft 702 to start rotating. Due to the meshing of the worm sleeve 703 and the worm wheel 801, the rope winding groove 8 starts to rotate, thereby winding and lifting the first traction rope 401 and the second traction rope 502. At this time, the internal gear 802 drives the pinion 804 to start rotating through the double-sided gear 803 and the transmission gear, which in turn causes the fan blade 901 in the air chamber 202 to start rotating, providing an upward reaction force. This reduces the probability of the hull capsizing to one side due to the increased resistance caused by the increased weight of the device after sampling, greatly improving the stability of the hull. The structure is ingenious and highly automated.

[0045] Reference Figure 8 and Figure 9 As shown, in an optional embodiment, a fastening and drainage assembly is provided inside the core sampling inner cylinder 5. The fastening and drainage assembly includes a spring 507 fixedly connected to the bottom surface of the vibration motor 501. The spring 507 is fixedly connected to a top pressure plate 506. The top pressure plate 506 slides up and down against the inner side wall of the core sampling inner cylinder 5. An inner drain port 509 is provided at the center of the top pressure plate 506. An outer drain port 508 is provided on the upper side wall of the core sampling inner cylinder 5. A pull groove 503 is provided on the side wall of the core sampling inner cylinder 5. A side pull door 504 is slidably connected to the pull groove 503. A PVC sampling tube 505 is located between the petal-shaped sealing ring 601 and the top pressure plate 506.

[0046] It should be noted that the fastening and drainage assembly utilizes the telescopic nature of the spring 507 and the sliding connection of the side door 504 on the pull groove 503 to successfully and conveniently insert the PVC sampling tube 505 into the inner core cylinder 5 and ensure it is tightly against the inner wall of the inner core cylinder 5. Before the PVC sampling tube 505 touches the bottom soil, the water inside the PVC sampling tube 505 will drain into the gap between the inner core cylinder 5 and the outer core cylinder 3 through the inner drain port 509 and the outer drain port 508, and finally be discharged from the lower end of the gap. This makes it difficult for impurities in the water to enter the gap between the inner core cylinder 5 and the outer core cylinder 3 during the descent of the outer core cylinder 3, allowing the inner core cylinder 5 to be smoothly removed from the outer core cylinder 3 during sampling. At the same time, the efficiency of the inner core cylinder 5 in downward sampling is improved by the lubrication of the water flow in the gap. The ingenious and efficient structure greatly improves the sampling smoothness of this device and is suitable for widespread use.

[0047] Reference Figure 4 As shown, in an optional embodiment, a plurality of conical anchors 402 are fixedly connected to the bottom surface of the bottom ring platform 4. The conical anchors 402 are formed by rotating half an arrow around a vertical central axis.

[0048] It should be noted that the setting of the conical anchor 402, combined with the gravity of the bottom ring platform 4, not only facilitates insertion into the underwater soil, but also, due to its barb-like design, makes the conical anchor 402 less prone to displacement, successfully making the bottom ring platform 4 more stable on the underwater surface. This, in turn, enables the outer core cylinder 3 to fall more accurately into the corresponding sampling point. The structure is ingenious and efficient.

[0049] In summary, this invention effectively overcomes some practical problems in the prior art, thus having high utilization value and significance.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A shallow water column corer, characterized in that, Including telescopic column (1), the bottom end of telescopic column (1) is fixedly connected with ladder base (101), and the top end of telescopic column (1) is connected with two groups of double cylinder sampling assemblies through fixing mechanism; The double cylinder sampling assembly includes top cavity (2), and the top cavity (2) is connected with coring outer cylinder (3) through connecting chain (203), the outer side wall of top cavity (2) is provided with multiple telescopic rods (201) at equal intervals, the top surface center of coring outer cylinder (3) is provided with perforation (302), the side wall of coring outer cylinder (3) is provided with inner cavity (303), the side wall of coring outer cylinder (3) is provided with multiple holes (301) at equal intervals, the bottom of coring outer cylinder (3) is provided with bottom ring table (4), the upper surface of bottom ring table (4) is fixedly connected with first pull rope (401) at the position of hole (301), the first pull rope (401) passes through hole (301) and the through hole (204) formed in the bottom surface of top cavity (2) and is connected with control mechanism in the inside of top cavity (2), the inside of coring outer cylinder (3) is provided with coring inner cylinder (5), the top of coring inner cylinder (5) is provided with vibration motor (501), the vibration motor (501) is connected with control mechanism through second pull rope (502) passing through perforation (302) and the bottom surface of top cavity (2), the inside of coring inner cylinder (5) is provided with PVC sampling pipe (505), the bottom of coring inner cylinder (5) is provided with ring cutter (6) and petal type sealing ring (601), and the control mechanism is used for controlling the retraction and release of first pull rope (401) and second pull rope (502).

2. A shallow water column sampler according to claim 1, wherein, The fixing mechanism includes connecting block (102) arranged at the top end of telescopic column (1), one telescopic rod (201) in the two groups of double cylinder sampling assemblies is clamped after being inserted into connecting block (102), and the telescopic rod (201) can be rotated and fixed on top cavity (2) according to requirements.

3. A shallow water column sampler according to claim 1, wherein, The outer side wall of top cavity (2) is provided with multiple stabilizing mechanisms at equal intervals, which are used for providing reaction force to keep the stability of the hull of the shallow water columnar sampler when coring outer cylinder (3) and coring inner cylinder (5) are lifted, the stabilizing mechanism includes air cavity (202), the inner top surface of air cavity (202) is rotatably connected with short shaft (9), the short shaft (9) is sleeved with pinion (804), the bottom of short shaft (9) is sleeved with fan blade (901), and pinion (804) is connected with control mechanism in the inside of top cavity (2) through transmission gear rotatably connected to the inner top surface of air cavity (202).

4. A shallow water column sampler according to claim 1, wherein, The inside of coring inner cylinder (5) is provided with fastening drainage assembly, the fastening drainage assembly includes spring (507) fixedly connected to the bottom surface of vibration motor (501), the spring (507) is fixedly connected with top pressing disc (506), the top pressing disc (506) slides up and down on the inner side wall of coring inner cylinder (5), the center of top pressing disc (506) is provided with inner drainage port (509), and the upper side wall of coring inner cylinder (5) is provided with outer drainage port (508).

5. A shallow water column sampler according to claim 4, wherein, The side wall of the coring inner cylinder (5) is provided with a pull groove (503), the pull groove (503) is slidably connected with a side pull door (504), and the PVC sampling pipe (505) is located between the petal-shaped sealing ring (601) and the top pressing disc (506).

6. A shallow water column sampler according to claim 1, wherein, The bottom surface of the bottom ring table (4) is fixedly connected with a plurality of conical anchors (402), and the conical anchor (402) is formed by rotating a half arrow around a vertical central axis.

7. A shallow water column sampler according to claim 1, wherein, The control mechanism comprises a power assembly and a rope winding assembly, the power assembly comprises a first motor (7) and a second motor (705), the output end of the first motor (7) is connected with a rotating shaft (702) through a first belt (701), the rotating shaft (702) rotates horizontally on the inner side wall of the top cavity (2), a plurality of worm sleeves (703) are arranged on the rotating shaft (702), the worm sleeves (703) are connected with the rope winding assembly, the rope winding assembly is connected with a double-sided gear (803), the double-sided gear (803) is rotatably connected in the top cavity (2), the output end of the second motor (705) is also sleeved with a worm sleeve (703), the inside of the top cavity (2) is also provided with a rope winding assembly beside the through opening (204), and the rope winding assemblies can be driven through a second belt (704).

8. A shallow water column sampler according to claim 7, wherein, The rope winding assembly comprises a rope winding groove body (8) rotatably connected to the bottom surface of the top cavity (2), the upper end of the rope winding groove body (8) is sleeved with a worm wheel (801) and an internal gear (802), the worm wheel (801) is engaged with the worm sleeve (703), and the rope winding assembly is arranged beside the first pulling rope (401) and the second pulling rope (502) extending into the inside of the top cavity (2).

9. A shallow water column sampler according to claim 1, wherein, The connecting chain (203) can be disassembled to be suitable for water bottom sampling in different water depths, and the display screen (104) is connected with the control mechanism in the inside of the top cavity (2) through a cable.

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