A shallow sea sediment sampler

Abstract

This utility model relates to the field of sediment sampling technology and discloses a shallow-sea sediment sampler, including an outer sampling tube and an inner sampling rod disposed inside it. The inner bottom of the outer sampling tube has an annular groove, and the top is fixed with an outer tube top plate with a circular hole and a lower handle. The inner sampling rod includes an inner rod shaft, with a bottom plate, a bottom connecting ring matching the groove, and a spiral drill tip fixed at its bottom. Seven sets of stirring blades are symmetrically installed on the lower section, and the top is fixed with an inner rod top plate with limiting rubber and an upper handle. This utility model guides the spiral drill tip to penetrate by rotating the inner rod, while the stirring blades pre-break and mix the sediment inside the tube, creating a smooth channel for sample entry. This allows the outer sampling tube to penetrate the formation with minimal lateral pressure, thereby maximizing the protection of the original bedding structure of the sample and effectively solving the problem of sample disturbance.

Description

Technical Field

[0001] This utility model relates to the field of sediment sampling technology, specifically a shallow sea sediment sampler. Background Technology

[0002] A shallow-sea sediment sampler is a tool used to collect samples of surface sediments on the seabed.

[0003] Currently, shallow sea sediment sampling mainly relies on impact or hydrostatic samplers. Their common feature is that the sampling tube is forcibly pressed into the formation by instantaneous impact or continuous pressure to achieve sampling. However, these existing technologies have a fundamental drawback: during the penetration process, there will be severe compression and friction between the sampling tube and the sediment, which will cause the sample to be severely compacted, the original bedding structure to be distorted or destroyed, and when the sampler is lifted, the sample often falls off due to poor bottom sealing or mixes with the overlying water, causing the sample to lose its original state and fail to truly reflect the stratigraphic information. Utility Model Content

[0004] The purpose of this invention is to provide a shallow sea sediment sampler to solve the problem of sample disturbance.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a shallow sea sediment sampler, comprising an outer sampling tube and an inner sampling rod disposed therein. The inner side of the bottom of the outer sampling tube is provided with an annular bottom groove. The inner sampling rod includes an inner rod shaft, the bottom of which is fixedly connected to a base plate. A bottom connecting ring matching the bottom groove is provided above the base plate. A spiral drill tip is fixedly provided below the base plate. Multiple stirring blades are fixedly installed on the lower section of the inner rod shaft. The upper section of the inner rod shaft is a smooth rod body that moves upward and extends through the top of the outer sampling tube.

[0007] Furthermore, the stirring blades are symmetrically mounted on the inner rod shaft, and seven sets are arranged in an array along the axial direction of the inner rod shaft.

[0008] Furthermore, an outer tube top plate is fixedly provided at the top of the sampling outer tube, and a circular hole is opened at the center of the outer tube top plate for the upper section of the inner rod shaft to pass through.

[0009] Furthermore, the outer tube top plate is provided with handles facing downwards on both sides.

[0010] Furthermore, an inner rod top plate is fixedly provided at the top of the inner rod shaft, and a limiting rubber is provided at the connection between the inner rod top plate and the inner rod shaft.

[0011] Furthermore, the inner rod top plate is provided with inner rod handles facing upwards on both sides.

[0012] This utility model has the following beneficial effects:

[0013] (1) During the penetration process, the operator drives the inner rod handle to rotate the inner rod shaft. The spiral drill tip at the bottom first drills into the formation for guidance. At the same time, the seven sets of stirring fan blades in the axial array of the lower section of the inner rod shaft rotate synchronously at high speed, actively breaking and mixing the sediment inside the sampling outer tube. This process creates a smooth channel for the sample to enter in advance, so that the sampling outer tube can penetrate into the formation with minimal lateral extrusion force when its internal space has been emptied or loosened, thereby protecting the original stratification structure of the sample to the greatest extent.

[0014] (2) When the sampler needs to be lifted, the operator lifts the inner rod handle, and the inner rod shaft rises accordingly, causing the bottom plate at its bottom to move up, so that the bottom ring fixed on the bottom plate is tightly engaged with the annular bottom groove at the bottom of the outer tube wall of the sampling tube, forming a reliable mechanical seal. This action is like a rising piston, which tightly seals the bottom opening of the outer tube of the sampling tube, thereby ensuring that the sample in the tube will not fall off from the bottom during the process of being lifted to the water surface through the overlying water body, and also effectively prevents the sample from being mixed and contaminated by backflow of water.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the outer tube structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the inner rod structure of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the stirring blade of this utility model;

[0021] Figure 5 This is a schematic diagram of the bottom connection structure of this utility model;

[0022] The attached diagram lists the components represented by each number as follows:

[0023] In the diagram: 1. Sampling outer tube; 11. Tube wall; 12. Bottom groove; 13. Outer tube top plate; 14. Outer tube handle; 2. Sampling inner rod; 21. Inner rod shaft; 22. Bottom connecting ring; 23. Spiral drill tip; 24. Inner rod top plate; 25. Limiting rubber; 26. Inner rod handle; 27. Stirring fan blade. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 As shown, this utility model is a shallow sea sediment sampler, including a sampling outer tube 1 and a sampling inner rod 2 disposed inside it. The inner side of the bottom of the tube wall 11 of the sampling outer tube 1 is provided with an annular bottom groove 12.

[0026] The top of the sampling outer tube 1 is fixedly provided with an outer tube top plate 13, and a circular hole is opened in the center of the outer tube top plate 13 for the upper section of the inner rod shaft 21 to pass through.

[0027] The outer tube top plate 13 is provided with handles 14 facing downwards on both sides;

[0028] During sampling, the operator first holds the outer tube handles 14 located on both sides of the outer tube top plate 13 with the handles facing downwards, and lowers the sampling outer tube 1 vertically. When the opening of the sampling outer tube 1 contacts the seabed, the operator applies downward pressure or impact force through the outer tube handles 14, driving the entire sampling outer tube 1 to penetrate into the seabed sediments through its tube wall 11. During the penetration process, the annular bottom groove 12 located on the inner side of the bottom of the tube wall 11 moves downwards, providing a structural basis for the subsequent sealing action. At the same time, the inner rod shaft 21 of the sampling inner rod 2 can slide and rotate relative to each other in the central circular hole of the outer tube top plate 13. This circular hole plays a guiding and supporting role, ensuring the concentricity of the sampling inner rod 2 and the sampling outer tube 1, making the internal movement smoother and more stable.

[0029] The sampling inner rod 2 includes an inner rod shaft 21, and a base plate is fixedly connected to the bottom of the inner rod shaft 21. A bottom connecting ring 22 that matches the bottom groove 12 is provided above the base plate, and a spiral drill tip 23 is fixedly provided below the base plate.

[0030] Multiple stirring blades 27 are fixedly installed on the lower section of the inner rod shaft 21;

[0031] The upper section of the inner rod shaft 21 is a smooth rod that moves upward and extends through the top of the sampling outer tube 1;

[0032] The stirring fan blades 27 are symmetrically installed on the inner rod shaft 21, and seven sets are arranged in an array along the axial direction of the inner rod shaft 21;

[0033] An inner rod top plate 24 is fixedly provided on the top of the inner rod shaft 21, and a limiting rubber 25 is provided at the connection between the inner rod top plate 24 and the inner rod shaft 21;

[0034] The inner rod top plate 24 is provided with inner rod handles 26 facing upward on both sides;

[0035] The operator grips and rotates the inner rod handles 26 on both sides of the inner rod top plate 24, driving the entire sampling inner rod 2 to rotate. The inner rod shaft 21 transmits torque to its bottom, where the spiral drill tip 23 first drills into the sediment, acting as a guide and opening path. Simultaneously, the seven sets of stirring blades 27, fixedly installed on the lower section of the inner rod shaft 21 and arranged in an axial array, rotate accordingly, actively breaking and mixing the sediment inside the sampling outer tube 1, thus creating space inside the tube for subsequent sample entry. When it is necessary to lift the sampler, the operator pulls the inner rod handles 26 upwards, and the smooth rod body of the upper section of the inner rod shaft 21 slides smoothly upwards in the circular hole of the outer tube top plate 13, causing the bottom plate to move upwards synchronously, so that the bottom connecting ring 22 tightly engages with the bottom groove 12 at the bottom of the sampling outer tube 1, ultimately completely sealing the bottom of the sampling tube. During this process, the limiting rubber 25 below the inner rod top plate 24... As it moves upward, it acts as a buffer and limits the maximum lifting stroke, preventing a rigid impact with the outer tube top plate 13.

[0036] In use, the operator holds the outer tube handles 14 on both sides of the sampling outer tube 1 and the inner rod handle 26 on the top of the sampling inner rod 2 with both hands, placing the sampler vertically on the seabed. At the start of sampling, the sampling outer tube 1 remains essentially stationary. The sampling inner rod 2 is rotated via the inner rod handle 26, driving the auger tip 23 at its bottom to drill into the sediment layer. Simultaneously, the seven sets of stirring blades 27 fixed to the lower section of the inner rod shaft 21 rotate, pre-breaking and mixing the sediment inside the sampling outer tube 1 to create space for sample entry, thereby reducing the pressure of the tube wall 11 on the surrounding strata. Once the sampling outer tube 1 has penetrated to the predetermined depth under hydrostatic pressure, rotation stops. Pulling the inner rod handle 26 upwards causes the inner rod shaft 21 to rise, which in turn moves the bottom plate upwards, making the bottom connecting ring 22 tightly engage with the bottom groove 12 at the bottom of the sampling outer tube 1. This bottom plate completely seals the bottom opening of the sampling outer tube 1. During this process, the smooth rod of the upper section of the inner rod shaft 21 slides smoothly in the central circular hole of the outer tube top plate 13, while the limiting rubber 25 below the inner rod top plate 24 acts as a buffer and limiter to prevent rigid collision with the outer tube top plate 13. Finally, the entire sampler is raised to the water surface. Since the bottom has been sealed, the sample is completely preserved inside the sampling outer tube 1, and the original sample is successfully obtained.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A shallow sea sediment sampler, comprising an outer sampling tube (1) and an inner sampling rod (2) disposed therein, characterized in that: The inner side of the bottom of the tube wall (11) of the sampling tube (1) is provided with an annular bottom groove (12). The sampling inner rod (2) includes an inner rod shaft (21), and a base plate is fixedly connected to the bottom of the inner rod shaft (21). A bottom connecting ring (22) matching the bottom groove (12) is provided above the base plate, and a spiral drill tip (23) is fixedly provided below the base plate. The lower section of the inner rod shaft (21) is fixedly equipped with multiple stirring blades (27); The upper section of the inner rod shaft (21) is a smooth rod body, which moves upward and passes through the top of the sampling outer tube (1).

2. The shallow sea sediment sampler according to claim 1, characterized in that: The stirring blades (27) are symmetrically installed on the inner rod shaft (21), and seven sets are arranged in an array along the axial direction of the inner rod shaft (21).

3. A shallow-sea sediment sampler according to claim 1, characterized in that: The top of the sampling tube (1) is fixedly provided with an outer tube top plate (13), and the center of the outer tube top plate (13) is provided with a circular hole for the upper section of the inner rod shaft (21) to pass through.

4. A shallow-sea sediment sampler according to claim 3, characterized in that: The outer tube top plate (13) is provided with outer tube handles (14) on both sides with the handles facing downwards.

5. A shallow-sea sediment sampler according to claim 3, characterized in that: The top of the inner rod shaft (21) is fixedly provided with an inner rod top plate (24), and a limiting rubber (25) is provided at the connection between the inner rod top plate (24) and the inner rod shaft (21).

6. A shallow-sea sediment sampler according to claim 5, characterized in that: The inner rod top plate (24) is provided with inner rod handles (26) on both sides with the handles facing upwards.

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