A test device for sampling riverbed mud

Abstract

The utility model relates to riverway sampling technical field, and specifically is a kind of for riverway bottom mud sampling test device, including fixed disc, main body cylinder, outer tube and inner tube, and the inner wall of outer tube bottom end is equipped with the first sample inlet being communicated with cavity, and the inner wall of inner tube bottom end is equipped with the second sample inlet being communicated with sampling cavity, and the bottom end of force link is located in sampling bin and passes through outer tube top end central place and is inserted in inner tube top end central place. The positioning block of sampling bin inner wall and the positioning groove of outer tube top end are mutually matched, and the design of the jackplug of inner tube top end and force link adaptation makes each component of device accurate positioning in the assembly and operating process, and outer tube can be conveniently taken down from sampling bin, and this detachable design not only facilitates cleaning and maintenance device, but also can quickly prepare next sampling work after single sampling is completed, effectively reduces device idle time, improves the repeat utilization of device, reduces use cost, and is applicable to multiple, multiple area riverway bottom mud sampling work.

Description

Technical Field

[0001] This utility model relates to the field of river sampling technology, specifically to a test device for sampling riverbed sediment. Background Technology

[0002] Current experimental apparatus for sampling riverbed sediments falls into two categories: surface samplers and columnar samplers. Surface samplers are primarily used to collect sediment samples from the bottom surface of water bodies, typically reaching depths of several centimeters to tens of centimeters below the water interface. These apparatuses include grab bucket samplers and box samplers. Columnar samplers are used to collect deeper sediment samples, obtaining columnar samples from the bottom surface to deeper areas, reaching depths of several meters or even greater. These samplers include gravity piston columnar samplers, rod-held gravity columnar samplers, and vibrating columnar samplers. However, among the above-mentioned experimental devices for bottom sediment collection, the mud samples collected by the surface grab collector are discontinuous blocks or clumps, which are mixed samples of surface sediments and cannot reflect the vertical stratification structure and variation pattern of sediments. The samples collected by the column collector can maintain the original stratification structure and order of sediments. However, both piston-type and vibratory samplers have some problems such as large and complex equipment size, difficulty in assembly and operation in practical applications, high equipment maintenance and repair costs, and inconvenience in carrying.

[0003] Therefore, we propose an experimental device for sampling sediment from riverbeds. Utility Model Content

[0004] The main objective of this invention is to provide a testing device for riverbed sediment sampling. The nested design of the outer and inner tubes, along with the first and second sampling ports and a limiting plate structure, enables layered sampling. During sampling, rotating the force-transmitting handle rotates the inner tube, causing the sampling ports to overlap and open for sampling. After sampling, the inlets are reset and closed, effectively isolating the sediment samples from overlying water contamination, ensuring the originality and purity of the samples, and improving the reliability of the test data. The positioning blocks on the inner wall of the sampling chamber cooperate with the positioning groove at the top of the outer tube, and the insertion hole design at the top of the inner tube matches the force-transmitting rod, ensuring precise positioning of each component during assembly and operation. The outer tube can be easily removed from the sampling chamber. This detachable design not only facilitates cleaning and maintenance but also allows for rapid preparation for the next sampling operation after a single sampling, effectively reducing downtime, increasing reusability, and lowering operating costs. It is suitable for multiple, multi-regional riverbed sediment sampling operations and effectively solves the problems in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A test apparatus for sampling riverbed sediment includes a fixed plate, a tripod support rod, a main cylinder, an outer tube, and an inner tube. The main cylinder has a sampling chamber inside for mounting the outer tube. The bottom end of the main cylinder has an opening communicating with the sampling chamber. The top end of the outer tube passes through the opening and is inserted into the sampling chamber. The outer tube has a cavity inside for mounting the inner tube. The inner wall at the bottom end of the outer tube has a first sampling port communicating with the cavity. The inner tube has a sampling chamber inside, and the inner wall at the bottom end of the inner tube has a second sampling port communicating with the sampling chamber. A fixed plate is fixedly connected to the top of the main body cylinder. A tripod support rod is rotatably connected to the outer edge of the lower end face of the fixed plate. Three sets of tripod support rods are arranged opposite each other. A bottom mud fixer is connected to the end of the tripod support rod away from the fixed plate through a first bolt. The bottom mud fixer has a locking tooth at the bottom end. A circular ring structure fixing ring is fitted on the lower part of the outer side of the main body cylinder. The outer side of the fixing ring is connected to the lower part of the tripod support rod through a support beam. A force transmission rod is rotatably connected at the center of the upper end face of the fixed plate. A force transmission handle is vertically connected to the top of the force transmission rod. The bottom end of the force transmission rod is located inside the sampling chamber and passes through the center of the top of the outer tube and is inserted into the center of the top of the inner tube.

[0006] By adopting the above technical solution, the positioning block on the inner wall of the sampling chamber cooperates with the positioning groove at the top of the outer tube, and the insertion hole design at the top of the inner tube matches the force transmission rod, so that each component of the device can be accurately positioned during assembly and operation. The outer tube can be easily removed from the sampling chamber. This detachable design not only facilitates cleaning and maintenance of the device, but also allows for quick preparation for the next sampling work after a single sampling is completed, effectively reducing the device's idle time and improving the device's reusability.

[0007] Specifically, the top of the inner tube is provided with a socket at the center that matches the bottom of the force transmission rod.

[0008] Specifically, a first limiting plate is vertically connected to one end of the inner wall of the cavity top, and the first limiting plate is located directly above the first injection port.

[0009] Specifically, a second limiting plate is vertically connected to the end of the inner tube away from the first limiting plate, and the second limiting plate is located directly above the second injection port.

[0010] Specifically, a positioning block is fixedly connected to the inner wall of the top of the sampling chamber, and a positioning groove adapted to the positioning block is provided at the top of the outer tube.

[0011] Specifically, the outer tube has a through hole at the center of its top end for the force transmission rod to pass through, and two sets of oppositely arranged mounting plates are fixedly connected to the lower outer side of the main tube.

[0012] The beneficial effects of this utility model are as follows: The experimental device for riverbed sediment sampling described in this utility model uses three sets of tripod support rods rotatably connected to the outer edge of the lower end face of the fixed plate, along with a sediment fixator with teeth at the bottom, to firmly grip the riverbed. Combined with the auxiliary support of the fixed ring and support beam for the tripod support rods, the sediment sampler remains horizontal and stable during sampling, effectively avoiding sampling deviations caused by water flow impact or device shaking, thus laying the foundation for obtaining accurate sediment samples. The nested design of the outer and inner tubes, along with the first and second sampling ports and the limiting plate structure, enables layered sampling. During sampling, rotating the force transmission handle drives the inner tube to rotate, causing the sampling ports to overlap and open. The sampling process, followed by a reset and offset closure, effectively isolates the sediment samples from overlying water, ensuring their originality and purity and improving the reliability of experimental data. The positioning blocks on the inner wall of the sampling chamber and the positioning groove at the top of the outer tube, along with the insertion hole design at the top of the inner tube that matches the force transmission rod, ensure precise positioning of all components during assembly and operation. The outer tube can be easily removed from the sampling chamber. This detachable design not only facilitates cleaning and maintenance but also allows for rapid preparation for the next sampling operation after a single sampling, effectively reducing downtime, increasing reusability, and lowering operating costs. It is suitable for multiple, multi-regional river sediment sampling operations. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the main cylinder of this utility model; Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle; In the diagram: 1. Fixed plate; 2. Tripod support rod; 20. Bottom mud fixer; 21. First bolt; 22. Clamping tooth; 23. Fixing ring; 24. Mounting plate; 25. Support beam; 30. Main tube; 323. Force transmission rod; 324. Force transmission handle; 4. Outer tube; 401. First limiting plate; 5. Inner tube; 501. Second limiting plate; 6. Sampling chamber; 7. First inlet; 8. Second inlet; 9. Sampling compartment; 10. Positioning block; 11. Insertion hole; 12. Cavity. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] As one embodiment of this utility model, such as Figures 1-3As shown, the present invention discloses a test device for sampling riverbed sediment, comprising a fixed plate 1, a tripod support rod 2, a main body cylinder 30, an outer tube 4, and an inner tube 5. The main body cylinder 30 has a sampling chamber 9 for installing the outer tube 4. The bottom end of the main body cylinder 30 has an opening communicating with the sampling chamber 9. The top end of the outer tube 4 passes through the opening and is inserted into the sampling chamber 9. The outer tube 4 has a cavity 12 for installing the inner tube 5. The inner wall of the bottom end of the outer tube 4 has a first sampling port 7 communicating with the cavity 12. The inner tube 5 has a sampling chamber 6 inside, and the inner wall of the bottom end of the inner tube 5 has a second sampling port 8 communicating with the sampling chamber 6. The top of the main body cylinder 30 is fixedly connected to a plate 1. A tripod support rod 2 is rotatably connected to the outer edge of the lower end face of the plate 1. The tripod support rod 2 is provided in three sets. The end of the tripod support rod 2 away from the plate 1 is connected to a bottom mud fixer 20 by a first bolt 21. The bottom mud fixer 20 is provided with a locking tooth 22 at the bottom end. A circular ring structure fixing ring 23 is fitted on the lower part of the outer side of the main body cylinder 30. The outer side of the fixing ring 23 is connected to the lower part of the tripod support rod 2 by a support beam 25. A force transmission rod 323 is rotatably connected at the center of the upper end of the fixed plate 1. A force transmission handle 324 is vertically connected to the top of the force transmission rod 323. The bottom of the force transmission rod 323 is located inside the sampling chamber 9 and passes through the center of the top of the outer tube 4 and is inserted into the center of the top of the inner tube 5.

[0017] In use, by pressing the force transmission handle 324, the main body 30, outer tube 4 and inner tube 5 are slowly lowered to the bottom of the river. At this time, the bottom ends of the outer tube 4 and inner tube 5 are in contact with the riverbed sediment. At this time, one hand holds the sampler steady and the other hand rotates the force transmission handle 324. Since the insertion hole 11 at the top of the inner tube 5 is adapted to the bottom end of the force transmission rod 323, the force transmission rod 323 can stably drive the inner tube 5 to move. The force transmission handle 324 drives the knob through the force transmission rod 323 to rotate the inner tube 5, rotating the second limiting plate 501 to the first limiting plate 401 on the other side, so that the second sampling port 8 and the first sampling port 7 overlap, and the sampling chamber 6 begins to enter the sediment.

[0018] This utility model also includes an insertion hole 11 at the center of the top of the inner tube 5, which is adapted to the bottom end of the force transmission rod 323.

[0019] The present invention also includes a first limiting plate 401 vertically connected to one end of the inner wall of the top of the cavity 12, and the first limiting plate 401 is located directly above the first injection port 7.

[0020] The present invention also includes a second limiting plate 501 vertically connected to the end of the inner tube 5 away from the first limiting plate 401, and the second limiting plate 501 is located directly above the second injection port 8.

[0021] The present invention also includes a positioning block 10 fixedly connected to the inner wall of the top of the sampling chamber 9, and a positioning groove adapted to the positioning block 10 is provided at the top of the outer tube 4.

[0022] This utility model also includes a through hole at the center of the top of the outer tube 4 for the force transmission rod 323 to pass through, and two sets of oppositely arranged mounting plates 24 fixedly connected to the lower outer side of the main body tube 30.

[0023] When using this utility model, firstly, an outer tube 4 equipped with an inner tube 5 is installed inside the main body cylinder 30. The top end of the outer tube 4 passes through the opening and is inserted into the sampling chamber 9. Since the bottom end of the force transmission rod 323 is located inside the sampling chamber 9, the bottom end of the force transmission rod 323 passes through the middle of the top end of the outer tube 4 and is inserted into the middle of the top end of the inner tube 5. Then, the entire mud sampler device is perpendicular to the water surface, and the rope is slowly lowered to allow the mud sampler device to gradually sink into the water until it stops sinking. The tripod support rod 2 supports the mud sampler device to ensure that its position is horizontal. By pressing the force transmission handle 324, the main body cylinder 30, outer tube 4, and inner tube 5 are slowly lowered to the bottom of the river. At this time, the bottom ends of the outer tube 4 and inner tube 5 are in contact with the riverbed sediment. At this time, one hand holds the sampler steady, and the other hand rotates the force transmission handle 324. Since the insertion hole 11 at the top of the inner tube 5 is compatible with the bottom end of the force transmission rod 323, the force transmission rod 323 can stably drive the inner tube 5 to move. The force transmission handle 324 drives the knob through the force transmission rod 323 to rotate the inner tube 5, rotating the second limiting plate 501 to the first limiting plate 401 on the other side, so that the second sampling port 8 and the first sampling port 7 overlap, and the sampling chamber 6 begins to enter the sediment. After sampling is completed, rotate the inner tube 5 to reset the second limiting plate 501 to ensure that the second sampling port 8 and the first sampling port 7 are misaligned to avoid the influence of the overlying water; then remove the entire sampler device from the bottom mud and remove the outer tube 4 from the sampling chamber 9 to prepare for the next mud sampling.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A test apparatus for sampling riverbed sediment, characterized in that, The device includes a fixed plate (1), a tripod support rod (2), a main body cylinder (30), an outer tube (4), and an inner tube (5). The main body cylinder (30) has a sampling chamber (9) for installing the outer tube (4) inside. The bottom end of the main body cylinder (30) has an opening that communicates with the sampling chamber (9). The top end of the outer tube (4) passes through the opening and is inserted into the sampling chamber (9). The outer tube (4) has a cavity (12) for installing the inner tube (5) inside. The bottom end of the outer tube (4) has a first inlet (7) that communicates with the cavity (12) on its inner wall. The inner tube (5) has a sampling chamber (6) inside. The bottom end of the inner tube (5) has a second inlet (8) that communicates with the sampling chamber (6) on its inner wall. The top of the main body cylinder (30) is fixedly connected to a plate (1), and a tripod support rod (2) is rotatably connected to the outer edge of the lower end face of the plate (1). The tripod support rod (2) is provided in three sets. The end of the tripod support rod (2) away from the plate (1) is connected to a bottom mud fixer (20) by a first bolt (21). The bottom mud fixer (20) is provided with a locking tooth (22) at the bottom end. A ring-shaped fixing ring (23) is fitted on the lower part of the outer side of the main body cylinder (30). The outer side of the fixing ring (23) is connected to the lower part of the tripod support rod (2) by a support beam (25). A force transmission rod (323) is rotatably connected at the center of the upper end face of the fixed plate (1). A force transmission handle (324) is vertically connected to the top of the force transmission rod (323). The bottom end of the force transmission rod (323) is located inside the sampling chamber (9) and passes through the center of the top of the outer tube (4) and is inserted into the center of the top of the inner tube (5).

2. The experimental apparatus for riverbed sediment sampling according to claim 1, characterized in that, The inner tube (5) has an insertion hole (11) at the center of its top end that is compatible with the bottom end of the force transmission rod (323).

3. The experimental apparatus for riverbed sediment sampling according to claim 1, characterized in that, The inner wall of the top of the cavity (12) is vertically connected to a first limiting plate (401) at one end, and the first limiting plate (401) is located directly above the first injection port (7).

4. The experimental apparatus for riverbed sediment sampling according to claim 1, characterized in that, The top end of the inner tube (5) away from the first limiting plate (401) is vertically connected to a second limiting plate (501), and the second limiting plate (501) is located directly above the second injection port (8).

5. The experimental apparatus for riverbed sediment sampling according to claim 1, characterized in that, The sampling chamber (9) has a positioning block (10) fixedly connected to the inner wall of the top, and the top of the outer tube (4) has a positioning groove that matches the positioning block (10).

6. The experimental apparatus for riverbed sediment sampling according to claim 1, characterized in that, The outer tube (4) has a through hole at the center of its top end for the force transmission rod (323) to pass through, and two sets of oppositely arranged mounting plates (24) are fixedly connected to the lower outer side of the main body tube (30).

Images