Multi-layer-section sampling device for detecting sand content of river flow

Abstract

The invention discloses a multilayer sampling device for river flow sand content detection, and relates to the technical field of river flow sand content detection.The multilayer sampling device comprises a sampling frame, and the positions, close to the two sides, of the outer surface of the lower end of the sampling frame are fixedly connected with inserting columns used for being fixed into a river; the connecting assembly is arranged between the threaded rod and the sampling barrel, the sampling depth of the sampling barrel can be adjusted in a unified mode, meanwhile, the distance between every two adjacent sets of sampling barrels can be adjusted, the diversity of sampling data is increased, and on the basis, sand filtering cloth is arranged in the sampling barrel, so that the sampling efficiency is improved. River water enters the sampling barrel through the water inlet hole, silt and impurities in the river water are blocked by the sand filtering cloth, and compared with traditional sampling equipment which collects the sand grains through natural precipitation of the sand grains in the river water, the amount of the sand grains flowing out of the sampling barrel along with the river water is reduced, and the data collection precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of river water flow sediment content detection, and in particular to a multi-layer section sampling device for river water flow sediment content detection. Background Art

[0002] Silt is deposited at the bottom of the river. Silt is a mixture of countless particles of different sizes, shapes and minerals. Silt transport is an important hydrological phenomenon in rivers and has a significant impact on river changes. When heavy rain falls on the surface of the basin, the rock and soil of the slopes and gullies are eroded during the process of runoff and confluence, and the soil is transported to the river by water to form river sediment. The study of river sediment is of great significance to river management.

[0003] In order to monitor the sediment content in the river and effectively prevent and control soil erosion, it is usually necessary to take samples of the river. Since sediment is easy to deposit, the sediment content at different water depths is different. Sampling at different water depths is necessary to reflect the overall sediment content in the river.

[0004] The existing patent (Announcement No.: CN203561530U) is a river sand sampling device, which is aimed at determining the average sand content in a certain period of time, and can achieve the purpose of accurately and reasonably collecting sand samples according to needs.

[0005] However, the sampling device for detecting the sediment content of river water utilizes the natural sedimentation of sediment to collect the data of the sediment content of river water within a period of time. This method not only reduces the sampling rate, but also cannot prevent some sediment from being lost with the river water, thus resulting in inaccurate collected data.

[0006] In addition, river water flow rate is an important factor affecting the sand content of river water. Therefore, when collecting data, the overall flow rate inside the sampling tube must always be kept consistent with the water inlet flow rate at the water inlet pipe and the natural flow rate. Traditional sampling equipment cannot monitor and adjust the overall flow rate inside the sampling tube, the water inlet flow rate at the water inlet pipe and the natural flow rate of the river water at the same depth in real time, reducing the accuracy of the collected data. Summary of the invention

[0007] The purpose of the present invention is to provide a multi-layer section sampling device for detecting the sediment content of river water flow, so as to solve the technical defects proposed by the background technology.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a multi-layer section sampling device for detecting the sediment content of river water flow, comprising a sampling frame, the lower end outer surface of the sampling frame is fixedly connected with a plug column for fixing inside the river channel at positions near both sides, the upper end outer surface of the sampling frame is fixedly connected with a U-shaped plate, and the interior of the sampling frame is rotatably connected with two groups of threaded rods, the top ends of the two groups of threaded rods are penetrated to the top of the sampling frame and are fixedly connected with driving wheels, a conveyor belt is connected between the two groups of driving wheels, and a plurality of sampling mechanisms are arranged between the two groups of threaded rods;

[0009] A motor 1 is arranged on the upper outer surface of the U-shaped plate at a position corresponding to a group of driving wheels, and the output end of the motor 1 passes through the U-shaped plate and is fixedly connected to a connecting column, the connecting column is fixedly connected to the corresponding driving wheel, and a control panel is arranged on one side of the sampling rack.

[0010] Furthermore, the sampling mechanism includes a sampling tube, a connecting tube, a water inlet and a sealing plate; the sampling tube is arranged between two groups of threaded rods, and a connecting component with an adjustable position is arranged between the two groups of threaded rods and the sampling tube, one end of the sampling tube is open, and the open end of the sampling tube is detachably connected to the connecting tube, a water inlet is arranged on the outer surface of one side of the connecting tube, and two groups of automatically openable and closing sealing plates are arranged inside the water inlet, the outer surface of the lower end of the sampling tube is fixedly connected to a water outlet pipe on the side away from the connecting tube, and a control valve is arranged on one side of the water outlet pipe.

[0011] Furthermore, a connecting ring is provided inside the sampling barrel, and the outer diameter of the connecting ring is smaller than the inner diameter of the sampling barrel, and a plurality of groups of fixing columns are fixedly connected to the outside of the connecting ring at equal distances, and one end of the fixing column is fixedly connected to the connecting ring, and the other end is fixedly connected to the sampling barrel.

[0012] Furthermore, a sand filter cloth is fixedly connected to the interior of the sampling tube, and one end of the sand filter cloth away from the connecting ring is fixedly connected to the sampling tube, the sand filter cloth is made of polyester, and a motor 2 is provided on the side of the outer surface of the sampling tube away from the connecting tube, and a waterproof frame is provided on the outside of the motor 2.

[0013] Furthermore, the output end of the second motor passes through the interior of the sampling tube and is fixedly connected to a rotating rod, and one end of the rotating rod passes through the connecting ring and the sand filter cloth and is fixedly connected to a scraper, the scraper is fitted to the outer surface of the sand filter cloth, and an impeller is provided on the outer surface of the rotating rod between the connecting ring and the second motor.

[0014] Furthermore, the connecting assembly includes a connecting block, a movable hole and an internal threaded ring; the outer surface of the sampling tube and the positions corresponding to the two groups of threaded rods are fixedly connected with connecting blocks, and the connecting blocks are sleeved on the outside of the threaded rods, and the outer surface of the connecting block and the positions corresponding to the threaded rods are provided with movable holes, and the inside of the movable hole is provided with an internal threaded ring, and the internal threaded ring is threadedly connected to the corresponding threaded rod.

[0015] Furthermore, the two ends of the internal threaded ring respectively penetrate the upper and lower ends of the connecting block and are fixedly connected to the limiting ring, and the outer surface of the limiting ring is fitted with the outer surface of the connecting block, and a group of threaded holes are opened on the upper outer surface of the limiting ring located above the connecting block, and a plurality of groups of threaded grooves are opened in a circular shape at equal distances on the upper outer surface of the connecting block, and bolts are threadedly connected between the threaded holes and the threaded grooves.

[0016] Furthermore, the control panel is internally provided with a processor, a data acquisition module, a data analysis module and a control execution module;

[0017] The data acquisition module is used to collect the water inlet rate Hjs and the drainage rate Hps corresponding to each sampling cylinder during the sampling process, and send the water inlet rate Hji and the drainage rate Hpi corresponding to each sampling cylinder to the data analysis module through the processor. After receiving the water inlet rate Hji and the drainage rate Hpi, the data analysis module immediately analyzes the sampling situation of the sampling cylinder, generates a processing signal and sends it to the control execution module to control the operation of the component.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present invention, by arranging a connection assembly between the threaded rod and the sampling tube, not only can the sampling depth of the sampling tube be uniformly adjusted, but also the distance between two adjacent groups of sampling tubes can be adjusted, thereby increasing the diversity of sampling data. On this basis, by arranging a sand filter cloth inside the sampling tube, river water enters the interior of the sampling tube through the water inlet hole, and the silt and impurities in the river water are blocked by the sand filter cloth. Compared with the traditional sampling equipment that collects the sand in the river water by natural precipitation, the amount of sand flowing out of the sampling tube with the river water is reduced, and the accuracy of data collection is improved;

[0020] 2. In the present invention, by collecting and analyzing the river water flow rate at the water inlet and the outlet pipe during the sampling process, the sampling situation inside the sampling tube can be accurately and quickly determined, and the corresponding live components are controlled to operate according to the determination result to automatically process the inside of the sampling tube until Hpi=Hji=Hi, thereby avoiding the impurities or silt in the river water from adhering to the surface of the filter cloth in large quantities, affecting the water permeability of the filter cloth, and thereby increasing the water flow velocity difference on both sides of the filter cloth, eliminating the factor affecting the accuracy of data collection due to the difference between the overall water flow rate inside the sampling tube and the river water flow velocity value Hi outside the sampling tube at the height of the sampling tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 A combined view of a driving wheel and a conveyor belt of the present invention;

[0023] Figure 3 A combined view of the connection assembly and the threaded rod of the present invention;

[0024] Figure 4 For the present invention Figure 3 A magnified view of region A;

[0025] Figure 5 It is a structural schematic diagram of the sampling mechanism of the present invention;

[0026] Figure 6 It is a combined view of the connecting ring and the scraper of the present invention;

[0027] Figure 7 It is a system principle block diagram of the present invention.

[0028] Figure numerals: 1. sampling rack; 2. U-shaped plate; 3. threaded rod; 4. driving wheel; 5. sampling mechanism; 501. sampling tube; 502. connecting tube; 503. water inlet hole; 504. sealing plate; 505. water outlet pipe; 506. connecting ring; 507. fixing column; 509. sand filter cloth; 510. motor 2; 511. rotating rod; 512. scraper; 513. impeller; 6. motor 1; 7. conveyor belt; 8. connecting column; 9. connecting assembly; 901. connecting block; 902. movable hole; 903. internal threaded ring; 904. limiting ring; 905. bolt; 906. threaded groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: Figure 1-6 As shown, a multi-segment sampling device for detecting the sediment content of river water flow proposed by the present invention comprises a sampling frame 1, the lower end outer surface of the sampling frame 1 is fixedly connected with a plug column for fixing inside the river channel at positions near both sides, the plug column is inserted into the bottom of the river channel to ensure the sampling stability, the upper end outer surface of the sampling frame 1 is fixedly connected with a U-shaped plate 2, and the interior of the sampling frame 1 is rotatably connected with two groups of threaded rods 3, the top ends of the two groups of threaded rods 3 are penetrated to the top of the sampling frame 1 and are fixedly connected with a driving wheel 4, a conveyor belt 7 is transmission-connected between the two groups of driving wheels 4, and a plurality of groups of sampling mechanisms 5 are arranged between the two groups of threaded rods 3;

[0031] A motor 6 is provided on the upper outer surface of the U-shaped plate 2 at a position corresponding to a group of driving wheels 4, and the output end of the motor 6 passes through the U-shaped plate 2 and is fixedly connected to a connecting column 8, which is fixedly connected to the corresponding driving wheel 4.

[0032] The sampling mechanism 5 includes a sampling tube 501, a connecting tube 502, a water inlet 503 and a sealing plate 504; the sampling tube 501 is arranged between the two groups of threaded rods 3, and the sampling frame 1 is inserted into the river channel, with the water inlet 503 facing the upstream direction of the river water flow, and then the motor 6 is controlled to run, and the motor 6 drives the connecting column 8 to drive the driving wheel 4 to rotate. The two groups of driving wheels 4 rotate synchronously under the action of the conveyor belt 7, and the two groups of threaded rods 3 rotate in the same direction at the same time. Multiple groups of sampling tubes 501 move up and down synchronously until all sampling tubes 501 are at a preset depth, and then the motor 6 is turned off.

[0033] A connecting component 9 with an adjustable position is provided between the two groups of threaded rods 3 and the sampling tube 501. One end of the sampling tube 501 is open, and the open end of the sampling tube 501 is detachably connected to the connecting tube 502. A water inlet hole 503 is provided on the outer surface of one side of the connecting tube 502, and two groups of automatically openable and closing sealing plates 504 are provided inside the water inlet hole 503. A water outlet pipe 505 is fixedly connected to the side of the outer surface of the lower end of the sampling tube 501 away from the connecting tube 502, and a control valve is provided on one side of the water outlet pipe 505. The river water after filtering the sand is discharged through the water outlet pipe 505.

[0034] A connecting ring 506 is provided inside the sampling tube 501, and the outer diameter of the connecting ring 506 is smaller than the inner diameter of the sampling tube 501. A plurality of groups of fixing columns 507 are fixedly connected to the outside of the connecting ring 506 at equal distances. One end of the fixing column 507 is fixedly connected to the connecting ring 506, and the other end is fixedly connected to the sampling tube 501.

[0035] A sand filter cloth 509 is fixedly connected to the interior of the sampling tube 501. River water enters the interior of the sampling tube 501 through the water inlet hole 503. The mud and impurities in the river water are blocked by the sand filter cloth 509, and the end of the sand filter cloth 509 away from the connecting ring 506 is fixedly connected to the sampling tube 501. The sand filter cloth 509 is made of polyester, has good sand filtering properties, can be dried and used repeatedly, and is corrosion-resistant.

[0036] Embodiment 2: Figure 5 As shown, the difference between this embodiment and embodiment 1 is that a motor 2 510 is provided on the side of the outer surface of the sampling tube 501 away from the connecting tube 502, and a waterproof frame is provided on the outside of the motor 2 510, and the output end of the motor 2 510 passes through the interior of the sampling tube 501 and is fixedly connected to a rotating rod 511.

[0037] One end of the rotating rod 511 passes through the connecting ring 506 and the sand filter cloth 509 and is fixedly connected with a scraper 512. The scraper 512 is in contact with the outer surface of the sand filter cloth 509. An impeller 513 is provided on the outer surface of the rotating rod 511 between the connecting ring 506 and the second motor 510. After receiving the processing signal, the control execution module immediately controls the operation of the second motor 510. The output end of the second motor 510 drives the rotating rod 511 and the impeller 513 on its surface to rotate, thereby increasing the flow rate of the river water to the outlet pipe 505.

[0038] The rotation speed of the rotating rod 511 gradually increases until Hpi=Hji=Hi, where Hi is the river water flow rate value outside the sampling tube 501 at the height of the sampling tube 501. During the rotation of the rotating rod 511, the scraper 512 rotates with the rotating rod 511 and scrapes the filter sand cloth 509.

[0039] Embodiment 3: Figure 1-4 As shown, the difference between this embodiment and embodiment 1 and embodiment 2 is that before sampling, the distance between two adjacent groups of sampling tubes 501 is first adjusted according to the corresponding depths of the required samples, and the connecting component 9 includes a connecting block 901, a movable hole 902 and an internal threaded ring 903; the outer surface of the sampling tube 501 and the positions corresponding to the two groups of threaded rods 3 are fixedly connected with connecting blocks 901, and the connecting blocks 901 are sleeved on the outside of the threaded rods 3, and the outer surface of the connecting block 901 and the positions corresponding to the threaded rods 3 are provided with movable holes 902, and the inside of the movable hole 902 is provided with internal threaded rings 903, and the internal threaded rings 903 are threadedly connected with the corresponding threaded rods 3.

[0040] The two ends of the internal thread ring 903 respectively penetrate the upper and lower ends of the connecting block 901 and are fixedly connected to the limiting ring 904, and the outer surface of the limiting ring 904 is in contact with the outer surface of the connecting block 901. A group of threaded holes are provided on the upper outer surface of the limiting ring 904 located above the connecting block 901, and a plurality of groups of threaded grooves 906 are provided in a circular shape and at equal distances on the upper outer surface of the connecting block 901.

[0041] There is a bolt 905 threadedly connected between the threaded hole and the threaded groove 906. When adjusting, first screw the two groups of bolts 905 corresponding to the second sampling tube 501 from top to bottom, so that the bolts 905 are disengaged from the threaded groove 906 but located inside the threaded hole, and then synchronously rotate the limit ring 904 located above in the same direction. When the limit ring 904 rotates clockwise, the internal thread ring 903 drives the connecting block 901 to move along the threaded rod 3. When the limit ring 904 rotates clockwise, the two groups of sampling tubes 501 move downward, and when the limit ring 904 rotates counterclockwise, the sampling tube 501 moves upward.

[0042] Embodiment 4: Figure 1-7 As shown, the difference between this embodiment and embodiment 1, embodiment 2 and embodiment 3 is that a control panel is provided on one side of the sampling rack 1, and a processor, a data acquisition module, a data analysis module and a control execution module are provided inside the control panel;

[0043] The data acquisition module is used to collect the water inflow rate Hjs and the drainage rate Hps corresponding to each sampling cylinder 501 during the sampling process, and the water inflow rate Hji and the drainage rate Hpi corresponding to each sampling cylinder 501 are detected by a flow rate measuring instrument, where i is the number of the sampling cylinder 501, i is a natural number, and the sampling cylinders 501 are numbered 1, 2...i from top to bottom, and sent to the data analysis module through the processor;

[0044] After receiving the water inflow rate Hji and the water discharge rate Hpi, the data analysis module immediately analyzes the sampling situation of the sampling tube 501. The specific analysis process is as follows:

[0045] The water inflow rate Hji and the drainage rate Hpi are obtained, and the formula Obtain a sampling condition reference value Qyi, where k is a preset proportional coefficient, and compare and analyze the preset reference value Ys obtained and stored from the processor with Qyi, where Ys>0;

[0046] When Qyi≥Ys, a processing signal is generated, and the generated processing signal and the sampling tube 501 number i are sent to the control execution module. After receiving the processing signal, the control execution module immediately controls the motor 2 510 to run. The output end of the motor 2 510 drives the rotating rod 511 and the impeller 513 on its surface to rotate, thereby increasing the flow rate of the river water to the outlet pipe 505. The rotation speed of the rotating rod 511 gradually increases until Hpi=Hji=Hi;

[0047] Hi is the river water flow rate outside the sampling tube 501 at the height of the sampling tube 501. During the rotation of the rotating rod 511, the scraper 512 rotates with the rotating rod 511 and scrapes the filter sand cloth 509 to prevent impurities or silt in the river water from adhering to the surface of the filter sand cloth 509 in large quantities and affecting the water permeability of the filter sand cloth 509, thereby reducing the water flow velocity difference on both sides of the filter sand cloth 509 and improving the accuracy of the sampling data.

[0048] The working process and principle of the present invention are as follows:

[0049] Step 1: Before sampling, first adjust the distance between two adjacent sampling tubes 501 according to the corresponding depth of the required sample. When adjusting, first screw the two sets of bolts 905 corresponding to the second sampling tube 501 from top to bottom, so that the bolts 905 are disengaged from the thread groove 906 but located inside the threaded hole, and then synchronously rotate the upper limit ring 904 in the same direction, and the internal thread ring 903 drives the connecting block 901 to move along the threaded rod 3;

[0050] When the limiting ring 904 rotates clockwise, the two groups of sampling cylinders 501 move downward, and when the limiting ring 904 rotates counterclockwise, the sampling cylinders 501 move upward until the distance between the second sampling cylinder 501 and the first sampling cylinder 501 meets the sampling requirement, and then tighten the bolt 905 again to make it enter the corresponding thread groove 906, and then adjust the position of each sampling cylinder 501 from top to bottom in accordance with the above steps;

[0051] Step 2: After the distance between two adjacent groups of sampling tubes 501 is adjusted, the sampling rack 1 is inserted into the river channel, with the water inlet 503 facing the upstream direction of the river water flow, and then the motor 6 is controlled to run, and the motor 6 drives the connecting column 8 to drive the driving wheel 4 to rotate. The two groups of driving wheels 4 rotate synchronously under the action of the conveyor belt 7, and the two groups of threaded rods 3 rotate in the same direction at the same time. The multiple groups of sampling tubes 501 move up and down synchronously until all the sampling tubes 501 are at the preset depth, and then the motor 6 is turned off;

[0052] Step 3: After the motor 16 is turned off for 3 minutes, the sealing plate 504 is controlled to open the sealing plate 504, and the river water enters the interior of the sampling tube 501 through the water inlet hole 503. The silt and impurities in the river water are blocked by the sand filter cloth 509. Compared with the traditional sampling equipment, the natural sedimentation of sand in the river water is used to collect it, which reduces the amount of sand flowing out of the sampling tube 501 with the river water, improves the accuracy of the sampling data, and the river water after filtering the sand is discharged through the outlet pipe 505;

[0053] Step 4: When Qyi≥Ys, it means that the water inflow rate is much greater than the water discharge rate, which will cause a large difference between the overall flow rate of the river water inside the sampling tube 501 and the overall flow rate of the river water inside the river channel, and thus affect the accuracy of the sampling data. At this time, a processing signal is generated, and the generated processing signal and the sampling tube 501 number i are sent to the control execution module;

[0054] After receiving the processing signal, the control execution module immediately controls the motor 2 510 corresponding to the corresponding sampling barrel 501 to run, and the output end of the motor 2 510 drives the rotating rod 511 and the impeller 513 on its surface to rotate, thereby increasing the flow rate of the river water to the outlet pipe 505, and the rotation speed of the rotating rod 511 gradually increases until Hpi=Hji=Hi, wherein Hi is the river water flow rate value outside the sampling barrel 501 at the height of the sampling barrel 501. During the rotation of the rotating rod 511, the scraper 512 rotates with the rotating rod 511 and scrapes the sand filter cloth 509;

[0055] Step 5: After the sampling is completed, first close the sealing plate 504, then drain all the river water inside the sampling tube 501 through the outlet pipe 505, and then take out the sampling rack 1 to complete the sampling.

[0056] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-layered sampling device for detecting sediment content in river water, comprising a sampling frame (1), characterized in that: The lower end outer surface of the sampling rack (1) is fixedly connected to a plug post for fixing inside the river channel at positions near both sides, the upper end outer surface of the sampling rack (1) is fixedly connected to a U-shaped plate (2), and the interior of the sampling rack (1) is rotatably connected to two groups of threaded rods (3), the top ends of the two groups of threaded rods (3) penetrate to the top of the sampling rack (1) and are fixedly connected to driving wheels (4), a conveyor belt (7) is transmission-connected between the two groups of driving wheels (4), and a plurality of groups of sampling mechanisms (5) are arranged between the two groups of threaded rods (3); A motor (6) is arranged at a position on the upper outer surface of the U-shaped plate (2) corresponding to a group of driving wheels (4), and the output end of the motor (6) passes through the U-shaped plate (2) and is fixedly connected to a connecting column (8), and the connecting column (8) is fixedly connected to the corresponding driving wheel (4). A control panel is arranged on one side of the sampling rack (1).

2. A multi-segment sampling device for detecting sediment content in river flow according to claim 1, characterized in that: The sampling mechanism (5) comprises a sampling tube (501), a connecting tube (502), a water inlet hole (503) and a sealing plate (504); The sampling tube (501) is arranged between the two groups of threaded rods (3), and a connection assembly (9) with an adjustable position is arranged between the two groups of threaded rods (3) and the sampling tube (501). One end of the sampling tube (501) is open, and the open end of the sampling tube (501) is detachably connected to a connecting tube (502). A water inlet hole (503) is provided on an outer surface of one side of the connecting tube (502), and two groups of automatically openable and closable sealing plates (504) are arranged inside the water inlet hole (503). A water outlet pipe (505) is fixedly connected to a side of the outer surface of the lower end of the sampling tube (501) away from the connecting tube (502), and a control valve is arranged on one side of the water outlet pipe (505).

3. A multi-segment sampling device for detecting sediment content in river water according to claim 2, characterized in that: A connecting ring (506) is provided inside the sampling tube (501), and the outer diameter of the connecting ring (506) is smaller than the inner diameter of the sampling tube (501). A plurality of groups of fixing columns (507) are fixedly connected to the outside of the connecting ring (506) at equal distances, and one end of the fixing column (507) is fixedly connected to the connecting ring (506), and the other end is fixedly connected to the sampling tube (501).

4. A multi-segment sampling device for detecting sediment content in river flow according to claim 3, characterized in that: A sand filter cloth (509) is fixedly connected to the interior of the sampling tube (501), and one end of the sand filter cloth (509) away from the connecting ring (506) is fixedly connected to the sampling tube (501), and the sand filter cloth (509) is made of polyester. A second motor (510) is arranged on the side of the outer surface of the sampling tube (501) away from the connecting tube (502), and a waterproof frame is arranged on the outside of the second motor (510).

5. A multi-segment sampling device for detecting sediment content in river flow according to claim 4, characterized in that: The output end of the second motor (510) passes through the interior of the sampling tube (501) and is fixedly connected to a rotating rod (511), and one end of the rotating rod (511) passes through the connecting ring (506) and the sand filter cloth (509) and is fixedly connected to a scraper (512), the scraper (512) is in contact with the outer surface of the sand filter cloth (509), and an impeller (513) is provided on the outer surface of the rotating rod (511) between the connecting ring (506) and the second motor (510).

6. A multi-segment sampling device for detecting sediment content in river flow according to claim 2, characterized in that: The connection assembly (9) comprises a connection block (901), a movable hole (902) and an internal threaded ring (903); the outer surface of the sampling tube (501) and the positions corresponding to the two groups of threaded rods (3) are fixedly connected with the connection block (901), and the connection block (901) is sleeved on the outside of the threaded rod (3); the outer surface of the connection block (901) and the positions corresponding to the threaded rod (3) are provided with a movable hole (902), and the inside of the movable hole (902) is provided with an internal threaded ring (903), and the internal threaded ring (903) is threadedly connected to the corresponding threaded rod (3).

7. A multi-segment sampling device for detecting sediment content in river flow according to claim 6, characterized in that: The two ends of the internal threaded ring (903) respectively penetrate the upper and lower ends of the connecting block (901) and are fixedly connected to the limiting ring (904), and the outer surface of the limiting ring (904) is in contact with the outer surface of the connecting block (901), and a group of threaded holes are provided on the upper outer surface of the limiting ring (904) located above the connecting block (901), and a plurality of groups of threaded grooves (906) are provided on the upper outer surface of the connecting block (901) in a circular shape at equal distances, and bolts (905) are threadedly connected between the threaded holes and the threaded grooves (906).

8. A multi-segment sampling device for detecting sediment content in river water according to claim 7, characterized in that: The control panel is internally provided with a processor, a data acquisition module, a data analysis module and a control execution module; The data acquisition module is used to collect the water inlet rate Hjs and the water discharge rate Hps corresponding to each sampling cylinder (501) during the sampling process, and send the water inlet rate Hji and the water discharge rate Hpi corresponding to each sampling cylinder (501) to the data analysis module through the processor. After receiving the water inlet rate Hji and the water discharge rate Hpi, the data analysis module immediately analyzes the sampling situation of the sampling cylinder (501), generates a processing signal and sends it to the control execution module to control the operation of the component.

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