Underwater sediment sampling device

Abstract

The utility model provides an underwater sediment sampling device which comprises a sampling pipe, the sampling pipe is formed by buckling two sampling single bodies, the top of the sampling pipe is provided with an opening and closing mechanism, the opening and closing mechanism comprises two connecting parts which are respectively fixed with the two sampling single bodies, and the two connecting parts are connected through an adjusting connecting rod. The adjusting connecting rod comprises a first connecting rod and a second connecting rod which are hinged to each other, a connecting block is further fixed to the top end of the first connecting rod, a vertically-formed threaded hole is formed in the connecting block, and an opening and closing screw matched with threads of the threaded hole is arranged in the threaded hole in a penetrating mode. The sampling tube has the beneficial effects that the sampling tube is divided into the two groove-shaped sampling single bodies through the opening and closing mechanism, after sampling, one sampling single body is opened upwards, the other sampling single body is positioned at the bottom and is used for containing a sample, and at the moment, the shape structure of the sample in the sampling tube can be kept not loose by virtue of the viscosity of the sample; therefore, the layers of the underwater sediments can be completely displayed, and layered sampling is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of underwater sampling, specifically to an underwater sediment sampling device. Background Technology

[0002] Bottom sediment sampling refers to the process of collecting sediment samples from the bottom of a water body for purposes such as environmental monitoring, geological research, engineering surveys, and ecological investigations. Sediments record historical changes in water bodies, including pollution levels, paleoclimate records, and biological activity; therefore, sampling methods and techniques are crucial. When sampling bottom sediments, selecting an appropriate sampler requires comprehensive consideration of sediment properties, sampling depth, sample quality requirements, operating environment, and research objectives. Common samplers include handheld sampling tubes, box samplers, piston samplers, vibrating samplers, and grab samplers.

[0003] Handheld sampling tubes, such as gravity sampling tubes, can penetrate soft layers by their own weight or slight pressure. They are often used when the bottom sediments are soft and loose and the sampling depth is shallow, such as when the surface sediments are soft mud, clay, or unconsolidated silt. They are used very frequently because they are low in cost, easy to operate, and can be used for preliminary sampling in environmental monitoring. However, after sampling, the sample needs to be pushed out of the sampling tube by pressure before sampling can be performed. The sample after being pushed out of the sampling tube will be loose and collapse, changing its original properties and structural layers, thus making it impossible to accurately sample the bottom sediments in layers. Utility Model Content

[0004] This invention proposes a bottom sediment sampling device that can divide the sampling tube into two groove-shaped sampling units through an opening and closing mechanism. After sampling, one sampling unit is opened upwards, while the other sampling unit is located at the bottom to hold the sample. At this time, the sample can maintain its shape and structure within the sampling tube due to its own viscosity, thus completely displaying the layers of bottom sediment and achieving layered sampling.

[0005] Therefore, the technical solution adopted is as follows:

[0006] A bottom sediment sampling device includes a sampling tube, which is formed by two sampling units interlocked together. The top of the sampling tube has an opening and closing mechanism, which includes two connecting parts, each fixed to one of the two sampling units. The two connecting parts are connected by an adjusting rod, which includes a connecting rod one and a connecting rod two that are hinged to each other. The bottom ends of the connecting rod one and the connecting rod two are respectively hinged to the bottom ends of the two connecting parts, and their top ends are respectively slidably connected to the two connecting parts. A connecting block is also fixed to the top end of the connecting rod one. The connecting block has a vertically arranged threaded hole, and an opening and closing screw matching its thread passes through the threaded hole.

[0007] A further technical solution includes an operating head and a vertically arranged connecting pipe. A connecting plate is fixed on the connecting part where one end of the connecting rod is located. The connecting plate is located at the top of the connecting part, and the top end of the opening and closing screw passes through the connecting plate. The upper and lower ends of the connecting pipe are detachably connected to the operating head and the connecting plate, respectively.

[0008] A further technical solution is that a water-blocking plate is fixed on the connecting part where the top of the connecting rod is located. The water-blocking plate is located at the bottom of the connecting part and divides the sampling tube into an opening and closing chamber and a sampling chamber. A fixing member is fixed between the water-blocking plate and the connecting plate to connect the two.

[0009] A further technical solution is that the connecting part is fixed to the inner surface of the sampling unit, and the contact surface is an arc-shaped structure that fits the shape of the inner surface of the sampling unit.

[0010] A further technical solution is that a fixing groove is formed around the outer wall of the sampling tube, and a connecting ring is embedded inside the fixing groove, and the connecting ring is detachably connected to the fixing groove.

[0011] A further technical solution is that the connecting ring is made of an elastic material, and a mud scraper bristle is fixed on its inner edge.

[0012] A further technical solution is that an adjustment port is provided on the side wall of the connecting pipe.

[0013] A further technical solution is that multiple vertically arranged rotor plates are fixed around the operating head.

[0014] The beneficial effects of this application are as follows:

[0015] 1. The sampling tube can be divided into two groove-shaped sampling units through the opening and closing mechanism. After sampling, one sampling unit can be opened upwards, while the other sampling unit is located at the bottom to hold the sample. At this time, the sample can maintain its shape and structure inside the sampling tube due to its own viscosity, so as to completely display the layers of sediment at the bottom of the water and realize layered sampling. In addition, the sampling tube, as an openable structure, can also facilitate cleaning after sampling.

[0016] 2. The connecting ring can assist the opening and closing mechanism in stably connecting and fixing the two sampling units, thereby ensuring the integrity of the sampling tube when it is inserted into the bottom of the water. Even if subjected to a large force, the two sampling units will not be separated. In addition, the mud scraping brush above it can scrape off the mud and dirt deposits on the outer wall of the sampling tube when the connecting ring is slid down and removed after sampling, making it convenient to open the sampling tube for sampling in the next step. Attached Figure Description

[0017] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of this application;

[0019] Figure 2 This is a schematic cross-sectional view of the sampling tube in its closed state as described in this application;

[0020] Figure 3 This is a cross-sectional view of the sampling tube in the open state described in this application.

[0021] Figure 4 This is a schematic diagram of the opening and closing cavity described in this application;

[0022] Figure 5 This is a top view of the opening and closing cavity described in this application (excluding the connecting plate).

[0023] Figure 6 This is a schematic diagram of the opening and closing mechanism described in this application in its retracted state;

[0024] Figure 7 This is a schematic diagram of the opening and closing mechanism described in this application in its open state;

[0025] Figure 8 This is an isometric structural diagram of the opening and closing mechanism described in this application;

[0026] Figure 9 This is a schematic diagram of the connecting ring described in this application.

[0027] In the diagram: 1. Sampling tube; 10. Sampling unit; 11. Opening and closing chamber; 12. Sampling chamber; 13. Fixing groove; 2. Opening and closing mechanism; 21. Connecting part; 22. Adjusting connecting rod; 221. Connecting rod one; 222. Connecting rod two; 23. Connecting block; 24. Opening and closing screw; 25. Connecting plate; 26. Waterproof plate; 27. Fixing component; 3. Operating head; 31. Rotary blade; 4. Connecting pipe; 41. Adjusting port; 5. Connecting ring; 51. Sludge scraper bristles. Detailed Implementation

[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0029] like Figures 1-9As shown, an underwater sediment sampling device includes a sampling tube 1, which is formed by two sampling units 10 interlocking with each other. The top of the sampling tube 1 has an opening and closing mechanism 2, which includes a connecting part 21. There are two connecting parts 21, which are respectively fixed to the two sampling units 10. The two connecting parts 21 are connected by an adjusting rod 22. The adjusting rod 22 includes a connecting rod 1 221 and a connecting rod 222 that are hinged to each other. The bottom ends of the connecting rod 1 221 and the connecting rod 222 are respectively hinged to the bottom ends of the two connecting parts 21, and the top ends are respectively slidably connected to the two connecting parts 21. The top end of the connecting rod 1 221 is also fixed with a connecting block 23. The connecting block 23 has a vertically arranged threaded hole, and an opening and closing screw 24 matching its thread passes through the threaded hole.

[0030] In this embodiment, when sampling, the opening and closing mechanism 2 tightens, and the sampling tube 1 is in a closed state. Using its own weight or with the help of tools such as a hammer, the sampling tube 1 is vertically inserted into the bottom sediment of the sampling point and reaches the required depth. At this time, the sediment at the bottom of the water will enter the sampling tube 1 from the sampling port at the bottom of the sampling tube 1 and be collected. At this time, the sample sediment inside the sampling tube 1 is distributed according to its actual stratification at the bottom of the water. After sampling, the sampling tube 1 can be pulled out by shaking it left and right. The operation is simple and quick, and the cost is low. It is widely used in the preliminary sampling stage of surface sediments that are relatively soft or environmental monitoring.

[0031] After sampling, sampling tube 1 enters the stratified sampling stage. Sampling tube 1 is placed horizontally with two sampling units 10 arranged vertically. By rotating the opening and closing screw 24, the connecting block 23 causes the top end of connecting rod 221 to move downwards along its connecting part 21. At this point, sampling tube 1 is in a horizontal state, moving towards the bottom of sampling tube 1. Since connecting rod 221 and connecting rod 222 are hinged together, and their bottom ends are respectively hinged to the bottom ends of the two connecting parts 21, while their top ends can slide vertically to the two connecting parts 21, the movement of connecting rod 221... This will drive the connecting rod 222 to move synchronously, causing the distance between the two connecting parts 21 to gradually increase. That is, the two sampling units 10 fixed to the two connecting parts 21 gradually move away and separate. At this time, one sampling unit 10 opens upwards, and the other sampling unit 10 is located at the bottom to hold the sample. The sample can maintain its shape and structure in the sampling tube 1 due to its own viscosity and will not loosen. According to the requirements, the sample is sampled in layers and placed into the sample bag or sample box and recorded. After the sampling is completed, the sampling tube 1 is cleaned, and then the opening and closing screw 24 is rotated in the opposite direction and locked to reseal the two sampling units 10 for storage.

[0032] like Figures 1-3As shown, the sampling device in this embodiment also includes an operating head 3 and a vertically arranged connecting tube 4. A connecting plate 25 is fixed on the connecting part 21 where the top of the connecting rod 221 is located. The connecting plate 25 is located at the top of the connecting part 21, and the top of the opening and closing screw 24 passes through the connecting plate 25. The upper and lower ends of the connecting tube 4 are detachably connected to the operating head 3 and the connecting plate 25, respectively. The operating head 3 allows the operator to easily pick up and use the entire sampling tube 1, and can also serve as the point of application for applying pressure to the sampling tube 1 during sampling. The connecting tube 4 is detachably connected to the operating head 3 and the connecting plate 25, i.e., the opening and closing mechanism 2, preferably by a threaded connection. On the one hand, this can enclose the opening and closing mechanism 2 in the sampling device to ensure its stable operation. On the most important aspect, the connecting tube 4 can be replaced with different lengths to meet different sampling depth requirements. Furthermore, the connecting tube 4 can also be configured as a telescopic structure.

[0033] like Figures 2-4 As shown, a water-isolating plate 26 is fixed to the connecting part 21 at the top of the connecting rod 221. The water-isolating plate 26 is located at the bottom of the connecting part 21 and divides the sampling tube 1 into an opening and closing chamber 11 and a sampling chamber 12. A fixing member 27 is fixed between the water-isolating plate 26 and the connecting plate 25 to connect the two. The function of the water-isolating plate 26 is to isolate the collected sample from the opening and closing mechanism 2 during sampling, ensuring the sealing of the opening and closing mechanism 2 and maintaining its stable operation. In addition, the fixing member 27 connects the connecting plate 25, the water-isolating plate 26 and the opening and closing mechanism 2 into a whole, so that the whole can be installed and manufactured separately, which is convenient for transportation, storage and replacement. Furthermore, the connecting plate 25 and the water-isolating plate 26 can also protect the opening and closing mechanism 2, increase the working strength of the opening and closing mechanism 2 and ensure its operational stability.

[0034] At the same time, such as Figure 8 As shown, in order to ensure the connection strength between the opening and closing mechanism 2 and the sampling unit 10, the connecting part 21 is fixed to the inner surface of the sampling unit 10, and the contact surface is an arc-shaped structure that fits the shape of the inner surface of the sampling unit 10, thereby increasing the contact area. During installation, the opening and closing mechanism 2 is first fixed to the connecting pipe 4 through the connecting plate 25, and then the two sampling units 10 are fixed to the two connecting parts 21 respectively.

[0035] Another embodiment of this application involves a fixing groove 13 encircling the outer wall of the sampling tube 1. A connecting ring 5 is embedded inside the fixing groove 13, and the connecting ring 5 is detachably connected to the fixing groove 13. Preferably, the connecting ring 5 is made of an elastic material, and a mud scraping brush bristle 51 is fixed on its inner edge. Although the sampling tube 1 itself is tapered, and the sampling port is inserted into the bottom sediment at its pointed end, the two sampling units 10 will gradually become tighter and tighter under the pressure of the external bottom sediment, and will not easily separate. However, considering that there may be hard particulate matter in the bottom sediment that may collide with the sampling port, the opening and closing mechanism 2 may not be strong enough to tighten the two sampling units 10, causing a gap between them. Therefore, during sampling, the two sampling units 10 are further bound together by the connecting ring 5.

[0036] The connecting ring 5 assists the opening and closing mechanism 2 in stably connecting and fixing the two sampling units 10, thereby ensuring the integrity of the sampling tube 1 when it is inserted into the bottom of the water. Even if subjected to a large impact force, the two sampling units 10 will not be separated. Furthermore, after the sampling tube 1 is pulled out, bottom mud will stick to its outer wall. The mud scraping brush 51 above the connecting ring 5 can scrape off the mud and dirt deposits on the outer wall of the sampling tube 1 when the connecting ring 5 is slid down and removed after sampling, which facilitates the next step of opening the sampling tube 1 for sampling. Depending on the specific length of the sampling tube 1, multiple connecting rings 5 ​​can be set.

[0037] like Figure 1 As shown, since sampling sediments at the bottom of the water generally requires multiple samplings at different sampling points, an adjustment port 41 is provided on the side wall of the connecting pipe 4 to increase the ease of operation of the sampling device. This allows for adjustment by simply opening the adjustment port 41 when rotating the opening and closing screw 24 of the opening and closing mechanism 2, without needing to remove the connecting rod. Furthermore, multiple vertically arranged rotor plates 31 are fixed around the operating head 3. These rotor plates 31 can adjust the water flow dynamics, reduce turbulence, and make it easier for the sampling tube 1 to penetrate the water and sediment. They also help guide the water flow, reduce resistance, and adjust the direction when entering the sediment layer to ensure that the sampling tube 1 enters vertically, avoiding inaccurate samples due to tilting.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for sampling underwater sediments, characterized in that, include: The sampling tube (1) is formed by two sampling units (10) being fastened together. The top of the sampling tube (1) has an opening and closing mechanism (2). The opening and closing mechanism (2) includes a connecting part (21). There are two connecting parts (21) and they are fixed to the two sampling units (10) respectively. The two connecting parts (21) are connected by an adjusting rod (22). The adjusting rod (22) includes a connecting rod one (221) and a connecting rod two (222) that are hinged to each other. The bottom ends of the connecting rod one (221) and the connecting rod two (222) are respectively hinged to the bottom ends of the two connecting parts (21), and the top ends are respectively slidably connected to the two connecting parts (21). The top end of the connecting rod one (221) is also fixed with a connecting block (23). The connecting block (23) has a vertically set threaded hole. An opening and closing screw (24) matching its thread is passed through the threaded hole.

2. The underwater sediment sampling device according to claim 1, characterized in that, It also includes an operating head (3) and a vertically arranged connecting pipe (4). A connecting plate (25) is fixed on the connecting part (21) where the top of the connecting rod (221) is located. The connecting plate (25) is located at the top of the connecting part (21), and the top of the opening and closing screw (24) passes through the connecting plate (25). The upper and lower ends of the connecting pipe (4) are detachably connected to the operating head (3) and the connecting plate (25) respectively.

3. The underwater sediment sampling device according to claim 2, characterized in that, A water-blocking plate (26) is also fixed on the connecting part (21) where the top of the connecting rod (221) is located. The water-blocking plate (26) is located at the bottom of the connecting part (21) and divides the sampling tube (1) into an opening and closing chamber (11) and a sampling chamber (12). A fastener (27) is fixed between the water-blocking plate (26) and the connecting plate (25) to connect the two.

4. The underwater sediment sampling device according to claim 1, characterized in that, The connecting part (21) is fixed to the inner surface of the sampling unit (10), and the contact surface is an arc-shaped structure that fits the shape of the inner surface of the sampling unit (10).

5. The underwater sediment sampling device according to claim 1, characterized in that, The outer wall of the sampling tube (1) is provided with a fixing groove (13) that surrounds it. A connecting ring (5) is embedded inside the fixing groove (13). The connecting ring (5) is detachably connected to the fixing groove (13).

6. The underwater sediment sampling device according to claim 5, characterized in that, The connecting ring (5) is made of elastic material, and a scraping brush bristle (51) is fixed on its inner edge.

7. The underwater sediment sampling device according to claim 2, characterized in that, An adjustment port (41) is provided on the side wall of the connecting pipe (4).

8. The underwater sediment sampling device according to claim 2, characterized in that, The operating head (3) is surrounded by a plurality of vertically arranged rotor plates (31).

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