A sampling device for detecting pollution of water body sediments

Abstract

The application discloses a sampling device for water body sediment pollution detection, which comprises sampling tubes, a device platform, a detection bin, storage tubes, a sample unloading mechanism and a cleaning mechanism. The device platform is provided with lifting openings for lifting the sampling tubes. The detection bin is movably arranged on the device platform and is connected with a sample inlet tube. The storage tubes are arranged in two groups, each group comprises a plurality of storage tubes, and the plurality of storage tubes are sequentially transferred to a storage position. The storage tubes are movably arranged on the device platform. The sample unloading mechanism is used for discharging the excess gas in the sampling tubes during sampling and simultaneously used for transferring the samples in the sampling tubes to the sample inlet tube and the storage tubes. The cleaning mechanism is used for cleaning the interiors of the sampling tubes and the detection bin through the sample unloading mechanism. The application is used to solve the problem of low efficiency caused by the time occupied by the unloading, storage and cleaning of the samples after sampling in the prior art.

Description

Technical Field

[0001] This invention relates to the field of water pollution detection technology, and more specifically to a sampling device for detecting water sediment pollution. Background Technology

[0002] Aquatic sediments are solid materials formed when particles moved by fluid flow in a water body eventually settle on the bottom. They typically include a mixture of silt, organic matter, and various minerals. Aquatic sediments are not only a collection point for water pollutants but also a potential source of pollution. Pollutants in sediments can be released into the water body through water flow, affecting water quality and the ecosystem. As water pollution problems intensify, the treatment and remediation of sediments have become particularly important. The detection of aquatic sediments is a necessary step in the treatment and remediation of sediments.

[0003] Currently, the detection of sediments in water bodies is generally carried out using column samplers or grab samplers. Grab samplers have a shallow sampling depth and it is difficult to collect deep sediments, which limits the detection results. Column samplers use gravity, vibration or piston assistance to vertically penetrate the sampling tube into the bottom sediment, which can obtain complete and undisturbed columnar sediments for detection.

[0004] In the traditional model, the sampler is only responsible for acquiring samples, while the testing process is completed in the laboratory. The existing column sampler is a single-operation sampler, acquiring a sample from one point at a time. For multi-point testing in large water areas, the entire process of lowering, sampling, lifting, unloading, and cleaning needs to be repeated. Sampling is interrupted during unloading and cleaning, and the samples need to be sealed after unloading, which also takes up time. The effective working time is relatively low, and the sampling efficiency needs to be improved. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a sampling device for detecting water sediment pollution, thereby solving the problem mentioned in the background art where the time spent on sample unloading, sealing, and cleaning after sampling in multi-point sampling detection is low and the efficiency is low.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a sampling device for detecting water sediment pollution, comprising sampling tubes, wherein two sets of sampling tubes are provided, each set having two sampling tubes, the two sampling tubes being a detection sampling tube and a sealing sampling tube respectively, the two sets of sampling tubes taking samples alternately, and further comprising: The equipment platform has a lifting port for raising and lowering the sampling tube; The detection chamber is movably mounted on the equipment platform. The detection chamber is connected to a sample inlet tube. The detection chamber can move the sample inlet tube to the bottom of each detection sampling tube to receive samples. The detection chamber has built-in sensors to analyze the samples in real time. The sealing tube is provided in two sets, and each set of the sealing tube is provided with multiple sealing tubes. The multiple sealing tubes are sequentially transferred to the sealing station. The two sets of sealing tubes and the two sets of sampling tubes correspond one-to-one. The sealing tubes are movably set on the equipment platform. The sealing tube located at the sealing station can be moved to the bottom of the sealing sampling tube to receive and store the sample. A sample unloading mechanism is used to discharge excess gas from the sampling tube during sampling, and simultaneously to transfer the sample from the sampling tube to the injection tube and the sealing tube. The sample unloading mechanism includes: A piston plate, which is slidably and sealingly disposed inside the sampling tube; The push rod is a hollow structure that passes through the piston plate, and the push rod and the sampling tube are in a sealed sliding fit. An exhaust pipe, which is connected to the push rod, is used to discharge excess gas from the sampling tube; A cleaning mechanism is used to clean the interior of the sampling tube and the detection chamber via the sample unloading mechanism. The cleaning mechanism includes: A flushing tube, which is connected to the push rod and the exhaust pipe via a three-way valve, is used to deliver cleaning fluid into the sampling tube; The bottom of the testing chamber is connected to a sewage pipe, and a valve is installed on the sewage pipe.

[0007] To enable the conversion and movement of the sealing tube, a transfer mechanism is also included. This transfer mechanism is used to move the sealing tube to a position below the sample-collected sealing tube to receive the sample. The transfer mechanism includes: A movable frame is movably mounted on the equipment platform. The movable frame has a sealing port that can move with the movable frame to below the sealed sampling tube after sampling is completed. A conversion frame is rotatably mounted on the movable frame. Multiple brackets are fixedly mounted on the conversion frame. The sealing tube is slidably mounted on the brackets. The top opening of the sealing tube is sealed and fitted to the movable frame. The conversion frame can drive the sealing tube to rotate to the sealing port, i.e., the sealing position.

[0008] To ensure stability during the sampling process, a limiting tube is fixedly installed at the top of the sampling tube. The limiting tube and the lifting port are in sliding fit, and the push rod is located inside the limiting tube.

[0009] To achieve the lifting and lowering of the sampling tube, a driving mechanism is also included. This driving mechanism drives the sampling tube and the push rod to lift and lower. The driving mechanism includes: A lifting frame, which can be raised and lowered on the equipment platform; A clamping plate, which is movable and rotatably mounted on the lifting frame; A clamping seat is fixedly mounted on the clamping plate, and a push plate is fixedly mounted on the push rod. The clamping plate can drive the clamping seat to clamp or release the push plate. The limiting tube has a moving opening for the push plate to pass through. A pressure plate is fixedly mounted on the clamping plate. A baffle is fixedly connected to the outside of the limiting tube. The baffle contacts the top of the equipment platform. The pressure plate has an opening for the baffle to pass through. When the clamping seat clamps the push plate, the opening and the baffle are positioned vertically. When the clamping seat moves away from the push plate, the pressure plate and the baffle have an overlapping area in the vertical direction.

[0010] To ensure the stability of the sampling tube, a damping block is movably installed on the equipment platform, and the damping block is in contact with the outer wall of the sampling tube.

[0011] (III) Beneficial Effects Compared with the prior art, the present invention provides a sampling device for detecting water sediment pollution, which has the following advantages: In this invention, a driving mechanism allows two sets of sampling tubes to descend sequentially. The sampling tubes penetrate the bottom sediment of the water body, allowing sediment to enter their interior. The driving mechanism then lifts the sampling tubes, and the equipment platform scrapes off the sludge from the surface of the tubes. The injection tube and the storage tube move below the detection sampling tube and the storage sampling tube, respectively. The driving mechanism then lowers the other sampling tube. During sampling in the other tube, the driving mechanism lowers the push rod on the sampled tube, pushing the samples from the detection sampling tube and the storage sampling tube into the detection chamber and the storage tube, respectively, via a piston. The sensor in the detection chamber detects the sample... Preliminary testing is performed, and the sample sealed in the sealing tube can be sent to the laboratory for other complex tests. The sealing tube is far away from the sealing sampling tube, and the flushing tube delivers cleaning fluid to the testing sampling tube and the sealing sampling tube to clean the testing sampling tube, the sealing sampling tube, and the testing chamber. The cleaned contaminants are discharged through the drain pipe. Compared with the existing technology, which requires a complete sampling process of repeated lowering-sampling-lifting-unloading-cleaning, this invention can detect and clean the sampled sample during sampling, achieving continuous sampling and detection and cleaning during the sampling process, which greatly improves the detection and sampling efficiency. Attached Figure Description

[0012] Figure 1This is a first-person view structural diagram of the entire application; Figure 2 This is a second-view structural diagram of the entire application; Figure 3 This is a structural schematic diagram of the equipment platform, limit tube, sampling tube, and drive mechanism of this application; Figure 4 This is a schematic diagram of the sealing sampling tube, limiting tube, push plate, and sample unloading mechanism of this application; Figure 5 This is a schematic diagram of the flushing tube, push plate, and sample unloading mechanism of this application; Figure 6 This is a schematic diagram of the drive mechanism of this application; Figure 7 This is a structural schematic diagram of the equipment platform, the double-headed electric cylinder II, the flushing pipe, and the drive mechanism of this application. Figure 8 This is a structural diagram of the equipment platform, testing chamber, sealing tube, and transfer mechanism of this application; Figure 9 This is a schematic diagram of the sealing tube and transfer mechanism of this application; Figure 10 For this application Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0013] In the picture: 1. Sampling tube for testing; 2. Sampling tube for sealing; 3. Equipment platform; 4. Limiting tube; 5. Testing chamber; 6. Electric cylinder one; 7. Injection tube; 8. Sealing tube; 9. Damping block; 10. Double-headed electric cylinder two; 101. Movable frame; 102. Conversion frame; 103. Electric cylinder two; 104. Motor one; 105. Bracket; 201. Piston plate; 202. Push rod; 203. Exhaust pipe; 301. Flushing pipe; 302. Sewage pipe; 401. Lifting frame; 402. Clamping plate; 403. Clamping seat; 404. Pressure plate; 405. Screw feed mechanism; 406. Double-headed electric cylinder one; 407. Motor two; 408. Push plate; 409. Baffle. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figures 1 to 10 A sampling device for detecting water sediment pollution includes sampling tubes, with two sets of sampling tubes, each set having two sampling tubes, namely a detection sampling tube 1 and a sealing sampling tube 2. The two sets of sampling tubes take turns sampling. It also includes an equipment platform 3, a detection chamber 5, a sealing tube 8, a sample unloading mechanism, and a cleaning mechanism.

[0016] The equipment platform 3 is equipped with a lifting port for raising and lowering the sampling tube. To ensure the stability of the sampling tube during the sampling process, a limit tube 4 is fixedly installed at the top of the sampling tube. The limit tube 4 and the lifting port are in sliding fit. A damping plate can be installed on the inner wall of the lifting port to provide a certain sliding damping between the limit tube 4, the sampling tube and the lifting port. This ensures a certain level of stability when no external force is applied. The push rod 202 is located inside the limit tube 4. The limit tube 4 and the sampling tube have the same diameter. When the sampling tube descends, the limit tube 4 contacts the inner wall of the lifting port to ensure the stability of the sampling tube. When one set of sampling tubes descends for sampling, another set of sampling tubes is located above. The two sets of sampling tubes work alternately.

[0017] The detection chamber 5 is movably mounted on the equipment platform 3. The detection chamber 5 is slidably mounted on the equipment platform 3. An electric cylinder 6 is installed on the equipment platform 3. The detection chamber 5 is fixedly located at the output end of the electric cylinder 6. The detection chamber 5 is connected to the sample inlet tube 7. The detection chamber 5 can drive the sample inlet tube 7 to move below the corresponding detection sampling tube 1 to receive the sample. The built-in sensor in the detection chamber 5 analyzes the sample in real time. The electric cylinder 6 can drive the detection chamber 5 and the sample inlet tube 7 to move. The bottom end of the sample inlet tube 7 is sealed to the bottom end of the equipment platform 3 to close the top opening of the sample inlet tube 7. When the bottom end of the sampling tube rises to be flush with the bottom end of the equipment platform 3, the sample inlet tube 7 moves below the detection sampling tube 1. The sample in the detection sampling tube 1 can enter the interior of the detection chamber 5 through the sample inlet tube 7 for detection. The interior of the detection chamber 5 integrates multiple sensors, such as a pH sensor, a micro electrochemical sensor array (for the detection of heavy metals such as lead, cadmium, and copper), and an optical sensor (for the detection of organic matter, sulfides, etc.). The data is uploaded to the control console above the water surface in real time through a waterproof connector.

[0018] Please see Figure 1 , Figure 2 , Figure 8 and Figure 9The equipment platform 3 has two sets of sealing tubes 8, each set containing multiple sealing tubes 8. These multiple sealing tubes 8 are sequentially transferred to the sealing station. Each set of sealing tubes 8 corresponds to one of the two sets of sampling tubes. The sealing tubes 8 are movably mounted on the equipment platform 3. The sealing tube 8 located at the sealing station can be moved below the sealing sampling tube 2 to receive and store the sample. To facilitate the transfer and movement of the sealing tubes 8, a transfer mechanism is also included. This mechanism moves the sealing tube 8 below the sampled sealing sampling tube 2 to receive the sample. The transfer mechanism includes a moving frame 101 and a conversion frame 102. The moving frame 101 is movably mounted on the equipment platform 3. Two electric cylinders 103 are installed on platform 3. A movable frame 101 is fixedly installed at the output end of the electric cylinders 103. A sealing port is provided on the movable frame 101, located on the side of the movable frame 101 near the sampling tube. The sealing port can move with the movable frame 101 to the bottom of the sealed sampling tube 2 after sampling. A conversion frame 102 is rotatably mounted on the movable frame 101. A motor 104 is installed on the movable frame 101. The central axis of the conversion frame 102 is fixedly installed at the output end of the motor 104. Multiple brackets 105 are fixedly mounted on the conversion frame 102. The sealed tube 8 is slidably mounted on the brackets 105. The top opening and the moving frame 101 are sealed together. The conversion frame 102 can rotate the sealing tube 8 to the sealing port, i.e., the sealing position. The conversion frame 102 and the bracket 105 can be rotated by the motor 104, thereby rotating multiple sealing tubes 8. The motor 104 rotates a specific angle at a time, which is the angle between two adjacent sealing tubes 8, rotating the sealing tubes 8 to the sealing port position in sequence. When the detection sampling tube 1 and the sealing sampling tube 2 rise to the equipment platform 3, the electric cylinder 103 drives the moving frame 101 to move, so that the sealing port moves to below the sealing sampling tube 2, and the sample in the sealing sampling tube 2 can enter. The sample is sealed inside the sealing tube 8 to maintain its original state as much as possible. Then, the sample in the sealing tube 8 can be transported to the laboratory for further and more complex and time-consuming tests, such as microbial community analysis. The sample is basically preserved in its original state inside the sealing tube 8. The detection sampling tube 1 and the sealing sampling tube 2 in the same group are sampled from the same area at the same time. The sample in the detection sampling tube 1 is detected in real time, and the sample in the sealing sampling tube 2 is sent to the laboratory inside the sealing tube 8 for further testing. This ensures the accuracy of the test, reduces the testing work in the laboratory, and greatly improves the testing efficiency.

[0019] The unloading mechanism is used to expel excess gas from the sampling tube during sampling and to transfer the sample from the sampling tube to the inlet tube 7 and the sealing tube 8. The unloading mechanism includes a piston plate 201, a push rod 202, and an exhaust pipe 203. The piston plate 201 is sealed and slidably disposed inside the sampling tube. The push rod 202 is a hollow structure that passes through the piston plate 201 and is sealed and slidably engaged with the sampling tube. The exhaust pipe 203 is connected to the push rod 202 and is used to expel excess gas from the sampling tube. During sampling, under the action of air pressure, the piston plate 201 is located at the top of the sampling tube. During the sampling process, as water sediment enters the interior of the sampling tube, the air pressure inside the sampling tube increases, expelling excess air and water from the sampling tube through the push rod 202 and the exhaust pipe 203, reducing the resistance of sediment entering the sampling tube. After sampling is completed, the sampling tube rises to a designated height, and the push rod 202 drives the piston plate 201 to descend, which can push the sample in the sampling tube out of the sampling tube for testing or sealing.

[0020] The cleaning mechanism is used to clean the inside of the sampling tube and the detection chamber 5 via the sample unloading mechanism. The cleaning mechanism includes a flushing pipe 301, which is connected to a push rod 202 and an exhaust pipe 203 via a three-way valve. This flushing pipe delivers cleaning fluid into the sampling tube. A drain pipe 302 is connected to the bottom of the detection chamber 5, and a valve is installed on the drain pipe 302. During sampling, the push rod 202 and the exhaust pipe 203 are connected via the three-way valve, allowing air and excess water in the sampling tube to be discharged through the exhaust pipe 203. After sampling, the piston plate 201 pushes the sample from the sampling tube into the detection chamber 5 and the sealing tube 8. Then, the flushing pipe 301 and the push rod 202 are connected via the three-way valve. Clean water is used as the cleaning fluid. The flushing pipe 301 is connected to an external water supply device, such as a water pump, which delivers clean water to the inside of the sampling tube, reducing other impurities while flushing the sampling tube. The introduction of certain elements can interfere with subsequent detection results. Meanwhile, the push rod 202 moves up and down with the piston plate 201, which can scrape the inner wall of the sampling tube. A high-pressure nozzle can be installed at the end of the push rod 202 to perform high-pressure rinsing on the piston plate 201 and the inner wall of the sampling tube. The cleaned product in the sealed sampling tube 2 is discharged directly from the bottom opening. The cleaned product in the detection sampling tube 1 enters the detection chamber 5 through the injection tube 7, which can clean the injection tube 7 and the detection chamber 5. An agitation mechanism, such as stirring blades and ultrasonic transducers, can be installed inside the detection chamber 5 to make the clean water flow or vibrate in the detection chamber 5, thereby improving the cleaning effect. At the same time, the sensor probe can be cleaned to reduce the impact on subsequent detection. After the detection is completed, the valve on the drain pipe 302 is opened by the valve, and the sediment in the detection chamber 5 and the dirt generated during cleaning can be discharged through the drain pipe 302.

[0021] Please see Figures 1 to 7To achieve the lifting and lowering of the sampling tube, a drive mechanism is also included. This drive mechanism is used to drive the sampling tube and push rod 202 to lift and lower. The drive mechanism includes a lifting frame 401, a clamping plate 402, a clamping seat 403, and a pressure plate 404. The lifting frame 401 is movably and rotatably mounted on the equipment platform 3. A lead screw feed mechanism 405 is installed on the equipment platform 3. The lifting frame 401 is mounted on the nut seat of the lead screw feed mechanism 405. The clamping plate 402 is movable and rotatable on the lifting frame 401. A double-headed electric cylinder 406 is mounted on the lifting frame 401. A second motor 407 is fixedly installed on each of the two output ends of the double-headed electric cylinder 406. Two clamping plates 402 are provided. Clamping plate 402 and motor 407 correspond one-to-one. Clamping plate 402 is fixedly installed at the output end of motor 407. Clamping seat 403 is fixedly installed on clamping plate 402. Push plate 408 is fixedly installed on push rod 202. Push plate 408 has a hollow structure. Push plate 408 is fixedly connected to two push rods 202 in the same group. Flushing pipe 301 and exhaust pipe 203 are connected to push plate 408 through a three-way valve. Clamping plate 402 can drive clamping seat 403 to clamp or release push plate 408. The limiting tube 4 has a moving opening for push plate 408 to pass through. Pressure plate 404 is fixedly installed on clamping plate 402. Baffle 409 is fixedly connected to the outside of limiting tube 4. The baffle 409 contacts the top of the equipment platform 3. The pressure plate 404 has an opening for the baffle 409 to pass through. When the clamping seat 403 clamps the push plate 408, the opening and the baffle 409 correspond vertically. When the clamping seat 403 moves away from the push plate 408, the pressure plate 404 and the baffle 409 overlap vertically. The screw feed mechanism 405 can drive the lifting frame 401 and the clamping plate 402 to move up and down. The double-headed electric cylinder 406 can move the two clamping plates 402 closer or further apart. The two clamping plates 402 drive the clamping seat 403 to move closer together to clamp the push plate 408. The motor 406... 07 can drive the clamping plate 402 to rotate, thereby driving the two sets of sampling tubes and the push plate 408 respectively. The lifting frame 401 can drive the push rod 202 to rise and fall. When the sampling tube is under the equipment platform 3 for sampling, the piston plate 201 is located at the top of the sampling tube. The push rod 202 rises, which can drive the sampling tube to rise for sample detection and sealing. The clamping plate 402 drives the clamping seat 403 away from the push plate 408, and the opening on the pressure plate 404 moves away from the baffle 409. The lifting frame 401 drives the clamping plate 402 to fall. The baffle 409 can be pressed down by the pressure plate 404, thereby driving the sampling tube to fall for sampling, thus realizing the lifting and falling drive of the sampling tube.

[0022] To ensure the stability of the sampling tubes, a damping block 9 is movably installed on the equipment platform 3. A double-headed electric cylinder 10 is mounted on the equipment platform 3. The damping block 9 is fixedly connected to the two output ends of the double-headed electric cylinder 10. The damping block 9 is in contact with the outer wall of the sampling tube. When the sampling tube descends or rises to the designated position, the double-headed electric cylinder 10 can drive the damping block 9 to press against the sampling tube or the limiting tube 4, thereby limiting all sampling tubes and ensuring the stability of the sampling tubes. When the damping block 9 presses against the limiting tube 4, it limits the sampling tube located below. When the position is locked, the damping block 9 also blocks the top of the baffle 409 to further ensure the stability of the sampling tube. At the same time, the injection tube 7 also limits the bottom of the detection sampling tube 1 to further ensure the stability of the detection sampling tube. The two sampling tubes in the same group are fixedly connected by the baffle 409 to achieve synchronous lifting and lowering. After the sampling tube located above is fixed by the damping block 9, the clamping seat 403 clamps the push plate 408, which can drive the push rod 202 and the piston plate 201 to descend, so that the sample in the sampling tube can be pushed out for detection and sealing.

[0023] It should be noted that the electronic components in the device, such as motor 104, motor 207, electric cylinder 16, electric cylinder 2103, double-headed electric cylinder 1406, and double-headed electric cylinder 210, are all waterproof, for example, by having a waterproof outer shell.

[0024] The working principle or usage process of the sampling device for detecting water sediment pollution is as follows: the device is placed in the water area to be tested, a set of sampling tubes is located below the equipment platform 3 for sampling, the baffle 409 is in contact with the top of the equipment platform 3, and the bottom of the other set of sampling tubes is flush with the bottom of the equipment platform 3 to prepare for subsequent sampling. The double-headed electric cylinder 10 drives the damping block 9 to press against the surface of the sampling tube or the limiting tube 4 to ensure the stability of the two sets of sampling tubes. The device sinks under the action of gravity. A vibration mechanism, such as a vibration motor, can be installed on the equipment platform 3 to assist the sinking of the sampling tube. Alternatively, the sampling tube above can be manually held or the lead screw feeding mechanism 405 can be pressed downwards. The sampling tube located below penetrates into the bottom sediment of the water body to a preset depth. The sediment enters the interior of the sampling tube for sampling. At the same time, the push rod 202 and the exhaust pipe 203 expel excess air and water from the sampling tube. Motor 2 407 drives clamping plate 402 to rotate to one side of the sampling tube after sampling. Screw feed mechanism 405 drives lifting frame 401 to descend. The two clamping plates 402 are in a position away from each other. The clamping plates 402 descend to the corresponding positions of clamping seat 403 and push plate 408. Double-headed electric cylinder 1 406 drives clamping seat 403 to clamp push plate 408. Double-headed electric cylinder 2 10 drives damping block 9 away from limit tube 4. Lifting frame 401 drives push plate 408, push rod 202 and piston plate 201 to rise, driving the two sampling tubes after sampling to rise, in preparation for testing and sealing. The dual-head electric cylinder 406 drives the clamping seat 403 away from the push plate 408, the motor 407 drives the clamping plate 402 to rotate 180 degrees, the lifting frame 401 drives the clamping plate 402 to descend, the pressure plate 404 drives the baffle 409 and the sampling tube to descend, the baffle 409 contacts the top of the equipment platform 3, and the sampling is switched to another set of sampling tubes. Then the dual-head electric cylinder 10 drives the damping block 9 to press against the limiting tube 4 and the surface of the sampling tube to fix them. The device can be moved to sample sediments in other water areas. During the sampling process, electric cylinder 6 moves the detection chamber 5 to the sampling tube after sampling. The sample inlet tube 7 is located below the detection sampling tube 1. Electric cylinder 103 moves the moving frame 101 and the sealing tube 8. The sealing port is located below the sealing sampling tube 2. The lifting frame 401 rises. Motor 407 drives the clamping plate 402 to rotate to one side of the sampling tube after sampling. The clamping seat 403 and the push rod 202 are in the same position. The double-headed electric cylinder 406 drives the clamping seat 403 to clamp the push rod 202. The baffle 409 and the opening are in the same position. The lifting frame 401 drives the clamping plate 402 to descend, so that the push rod 202 and the piston plate 201 descend to push the sample from the detection sampling tube 1 and the sealing sampling tube 2 into the detection chamber 5 and the sealing tube 8. The sensor in the detection chamber 5 performs preliminary detection on the sediment. Another sample is sealed inside the sealing tube 8. Electric cylinder 103 moves the moving frame 101 and the sealing tube 8 away from the sealing sampling tube 2. After testing and sealing are completed, the three-way valve connects the push rod 202 and the flushing pipe 301, and the valve on the drain pipe 302 is opened. The flushing pipe 301 sends water into the testing sampling tube 1 and the sealing sampling tube 2 to flush them. The residual sediment and water in the sealing sampling tube 2 are directly discharged. The sewage in the testing sampling tube 1 enters the interior of the testing chamber 5 through the sample inlet pipe 7, so that the sediment in the testing chamber 5 is discharged through the drain port. The sample inlet pipe 7, the testing chamber 5 and the sensor probe inside are flushed to reduce interference with the subsequent test results. Then, the electric cylinder 6 moves the testing chamber 5 and the sample inlet pipe 7 between the two sets of sampling tubes to avoid obstructing the alternation of the two sets of sampling tubes. Then, the above steps are repeated to make the two sets of sampling tubes sample alternately. While the lower sampling tube is sampling, the upper sampling tube is unloaded and cleaned.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sampling device for detecting water sediment pollution, comprising a sampling tube, characterized in that, The sampling tubes are arranged in two sets, with two sampling tubes in each set. The two sampling tubes are a detection sampling tube (1) and a sealing sampling tube (2). The two sets of sampling tubes sample alternately. The method also includes: The equipment platform (3) is provided with a lifting port for the sampling tube to be raised and lowered. The detection chamber (5) is movably mounted on the equipment platform (3). The detection chamber (5) is connected to the sample inlet tube (7). The detection chamber (5) can move the sample inlet tube (7) to the bottom of each detection sampling tube (1) to receive samples. The detection chamber (5) has built-in sensors to analyze samples in real time. The sealing tube (8) is provided in two sets, and each set of the sealing tube (8) is provided with multiple sealing tubes (8). Multiple sealing tubes (8) are sequentially transferred to the sealing station. The two sets of sealing tubes (8) and the two sets of sampling tubes correspond one to one. The sealing tube (8) is movably set on the equipment platform (3). The sealing tube (8) located at the sealing station can be moved to the bottom of the sealing sampling tube (2) to receive and store the sample. The sample unloading mechanism is used to discharge excess gas in the sampling tube during sampling, and at the same time to transfer the sample in the sampling tube to the inside of the injection tube (7) and the sealing tube (8); A cleaning mechanism is used to clean the inside of the sampling tube and the detection chamber (5) through the sample unloading mechanism.

2. The sampling device for detecting water sediment pollution according to claim 1, characterized in that, The sample unloading mechanism includes: Piston plate (201), the piston plate (201) is slidably disposed inside the sampling tube; Push rod (202), the push rod (202) is a hollow structure, the push rod (202) passes through the piston plate (201), and the push rod (202) and the sampling tube are in a sealed sliding fit; An exhaust pipe (203) is connected to the push rod (202) and is used to discharge excess gas from the sampling tube.

3. A sampling device for detecting water sediment pollution according to claim 2, characterized in that, The cleaning mechanism includes: A flushing tube (301) is connected to the push rod (202) and the exhaust pipe (203) via a three-way valve, and is used to deliver cleaning fluid into the sampling tube; The bottom of the testing chamber (5) is connected to a drain pipe (302), and a valve is installed on the drain pipe (302).

4. A sampling device for detecting water sediment pollution according to claim 1, characterized in that, It also includes a transfer mechanism for moving the sealing tube (8) to receive the sample below the sealed sampling tube (2) after sampling is completed.

5. A sampling device for detecting water sediment pollution according to claim 4, characterized in that, The transfer mechanism includes: A mobile frame (101) is movably mounted on the equipment platform (3). The mobile frame (101) has a sealing port that can move with the mobile frame (101) to below the sealed sampling tube (2) after sampling is completed. A conversion frame (102) is rotatably mounted on the movable frame (101). Multiple brackets (105) are fixedly mounted on the conversion frame (102). The sealing tube (8) is slidably mounted on the bracket (105). The top opening of the sealing tube (8) is sealed and fitted with the movable frame (101). The conversion frame (102) can drive the sealing tube (8) to rotate to the sealing port, i.e., the sealing station.

6. A sampling device for detecting water sediment pollution according to claim 2, characterized in that, The top end of the sampling tube is fixedly provided with a limiting tube (4), the limiting tube (4) and the lifting port are in sliding fit, and the push rod (202) is located inside the limiting tube (4).

7. A sampling device for detecting water sediment pollution according to claim 6, characterized in that, It also includes a drive mechanism for driving the sampling tube and the push rod (202) to rise and fall.

8. A sampling device for detecting water sediment pollution according to claim 7, characterized in that, The drive mechanism includes: A lifting frame (401) is movably mounted on the equipment platform (3); A clamping plate (402) is movably and rotatably mounted on the lifting frame (401); A clamping seat (403) is fixedly mounted on the clamping plate (402). A push plate (408) is fixedly mounted on the push rod (202). The clamping plate (402) can drive the clamping seat (403) to clamp or release the push plate (408). A moving opening is provided on the limiting tube (4) for the push plate (408) to pass through. A pressure plate (404) is fixedly mounted on the clamping plate (402). A baffle (409) is fixedly connected to the outside of the limiting tube (4). The baffle (409) is in contact with the top of the equipment platform (3). The pressure plate (404) has an opening for the baffle (409) to pass through. When the clamping seat (403) clamps the push plate (408), the opening and the baffle (409) are in the vertical direction. When the clamping seat (403) is away from the push plate (408), the pressure plate (404) and the baffle (409) have an overlapping area in the vertical direction.

9. A sampling device for detecting water sediment pollution according to claim 8, characterized in that, A damping block (9) is movably disposed on the equipment platform (3), and the damping block (9) is in contact with the outer wall of the sampling tube.

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