Water quality testing sampling device

Abstract

The present invention discloses a water quality detection sampling device, comprising a hull, a sampling mechanism arranged on the hull and a mobile mechanism arranged on the hull, the hull is provided with a through hole extending to the bottom of the ship, the sampling mechanism comprises a movable pipe, a hose, a water pump, a water outlet pipe, a gear, a rotating shaft and a rotating motor, the movable pipe is penetrated in the through hole and the outer wall of the movable pipe is provided with a rack, the gear is meshed with the rack, the gear is fixed on the rotating shaft and is coaxially arranged with the rotating shaft, the rotating motor is arranged on the hull, the hose is penetrated in the movable pipe and the hose and the movable pipe are detachably fixed, the water pump and the water outlet pipe are both fixed on the hull, the hose is connected to the water inlet of the water pump, the water outlet pipe is connected to the water outlet of the water pump, at least two mobile seats are provided on the hull, the mobile seat is provided with a fixed groove, a water storage bottle is provided in the fixed groove, and a drainage structure is provided on the hull. Compared with the prior art, the water sample obtained by the present invention is closer to the real water body, so that the detection result can better reflect the real condition of the water body.

Description

Technical Field

[0001] The invention belongs to the technical field of water quality detection, and particularly relates to a water quality detection sampling device. Background Art

[0002] Water is the source of life. Human beings cannot live without water in their daily life and production activities. The quality of water is closely related to human health. Therefore, it is necessary to test environmental water bodies (rivers, lakes, reservoirs and groundwater, etc.) and water pollution sources (domestic sewage, hospital sewage and industrial sewage, etc.). Water quality testing includes sampling.

[0003] Traditional sampling is done by manually driving a boat to a suitable location in the water area or sampling on the shore. The former requires a boat that can carry people, which is not portable and has certain risks. The water samples obtained by the latter are less representative. In order to solve the defects of traditional water collection, the utility model with application number 202122627455.4 discloses a sampling device for water environment engineering detection. The whole device is small and easy to carry. The length of the telescopic rod can be adjusted to control the distance of the hose from the shore, and the position of the float can be adjusted to control the depth of the water collection point from the water surface, so as to achieve the effect of flexibly adjusting the position of the water collection point. Sampling can be done at multiple points to make the samples obtained more dispersed, and the sample test results obtained are closer to the real water body.

[0004] However, the above patent still has the following problems: (1) the patent is only suitable for smaller and narrower waters;

[0005] (2) By testing the water quality at different depths, the conditions of the water area to be tested can be better understood. However, the patent either places the water samples obtained at different points in the same water storage pot, but this method causes the water samples at different depths to be mixed together, so that the test results may deviate from the actual conditions of the water area; or it is necessary to manually replace the water storage pot to obtain multiple water samples at different depths and different points, but this method is not only time-consuming and labor-intensive, but the water samples remaining in the hose will flow into the subsequent water storage pots, affecting the test results of the water samples in the subsequent water storage pots. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a sampling device that is adaptable to different water areas and convenient for taking water samples at different depths.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a water quality detection sampling device, comprising a hull, a sampling mechanism arranged on the hull and a moving mechanism arranged on the hull, the hull is provided with a through hole extending to the bottom of the ship, the sampling mechanism comprises a movable tube, a hose, a water pump, a water outlet pipe, a gear, a rotating shaft and a rotating motor for controlling the rotation of the rotating shaft, the movable tube is passed through the through hole and the outer wall of the movable tube is provided with a rack arranged along the axial direction of the movable tube, the gear is meshed with the rack, the gear is fixed on the rotating shaft and is coaxially arranged with the rotating shaft, and the rotating motor is arranged on the hull. The hose is passed through the movable tube and the hose and the movable tube are detachably fixed, the water pump and the outlet pipe are both fixed on the hull, the hose is connected with the water inlet of the water pump, and the outlet pipe is connected with the water outlet of the water pump. The hull is provided with at least two movable seats moved by a movable mechanism, the movable seat is provided with a fixed groove, and a water storage bottle is provided in the fixed groove; when the water storage bottle is moved to the point closest to the outlet pipe by the movable mechanism, the outlet pipe mouth away from the water pump faces the bottle mouth of the water storage bottle, and the hull is provided with a drainage structure that allows the fluid passing through the outlet pipe to leave the hull.

[0008] With the above scheme, a control center is provided in the hull, and the operator controls the control center through a remote control to make the present invention perform sampling operations. When sampling is required, the hull is moved to a suitable sampling position in the water area through the remote control, and the water storage bottle is moved to the outlet of the water pipe away from the water pump through the moving mechanism, and then the rotating motor is turned on to control the movable tube to move underwater to a suitable position through the gear, and then the water pump is turned on to allow the water at the outlet of the hose away from the water pump to enter the hose and flow into the water storage bottle through the outlet pipe, and the first sampling is completed. Depending on the different water samples that need to be collected this time, the subsequent operations are also different, as shown below:

[0009] (1) If the sampling is to take multiple water samples from the same point and the same depth, the moving mechanism is started to move the adjacent water storage bottles to the position directly below the outlet pipe away from the water pump, and then the water pump is turned on to take samples;

[0010] (2) If the sampling is to take multiple water samples at different points and the same depth, first control the hull to move to the next sampling point, then start the water pump and use the drainage structure to allow the water at this point to clean the hose, water pump and outlet pipe to prevent the water at the previous point from being mixed into the water sample obtained at this point, thereby ensuring the accuracy of the test results. After the cleaning is completed, stop the water pump and move the adjacent water storage bottle to the outlet pipe away from the water pump through the moving mechanism, then start the water pump to sample the new point;

[0011] (3) If the sampling is to take multiple water samples at the same point and different depths, the rotating motor is started, and the movable tube is controlled by the gear to move along its own axis. After moving to the appropriate position, the water pump is started and the water at the point is used to clean the hose, the water pump and the outlet pipe through the drainage structure. After the cleaning is completed, the water pump is stopped and the adjacent water storage bottle is moved to the outlet pipe away from the water pump through the moving mechanism, and then the water pump is started to sample water at different depths;

[0012] (4) If the sampling is to take multiple water samples from different points and depths, first sample the water at the same point and different depths, then move the hull to the next point, and then sample the water at different depths at the next point. The sampling steps are the same as (3).

[0013] Compared with the prior art, the present invention can adapt to water areas of different widths, is more convenient for operators to operate, and can obtain water samples from different points and / or different depths in batches, so that the obtained water samples are closer to the real water body, and the detection results can better reflect the real condition of the water body.

[0014] The movable tube of the present invention is made of hard material, such as engineering plastic. The hose has sufficient margin, so that the hose always remains connected to the water pump during the movement of the movable tube. The rotating motor is a motor with a self-locking function. Preferably, the hose and the movable tube are fixed by thread or clamping.

[0015] As a further configuration of the present invention, the drainage structure includes a guide rail, a guide block and a control motor for controlling the guide block to move along the guide rail, the guide block includes an inclined drain pipe, the end of the drain pipe close to the outlet pipe is higher than the end away from the outlet pipe, a notch is provided at one end of the drain pipe close to the outlet pipe, and the end of the drain pipe away from the outlet pipe is always located outside the hull; when the drain pipe moves to the closest position to the outlet pipe under the action of the control motor, the notch is opposite to the pipe mouth of the outlet pipe away from the water pump.

[0016] In the above scheme, "higher than" means that when the present invention is actually used, the end of the drain pipe away from the outlet pipe is tilted toward the water surface. When the hose, water pump and outlet pipe need to be cleaned, the guide block moves along the guide rail toward the outlet pipe under the action of the control motor until the gap is directly opposite to the outlet pipe opening away from the water pump, and then the water pump is turned on to allow the water at the new sampling position to flush the water remaining in the hose, water pump and drain pipe during the last sampling, so that it flows into the drain pipe through the gap and is discharged. In order to ensure the cleaning effect, the water pump is turned on for 3 to 5 seconds from the time water is discharged from the drain pipe.

[0017] If the water storage bottle does not move during cleaning, the operation is simple, but it is necessary to ensure that a gap is left between the water storage bottle and the water outlet pipe for the water supply and drainage pipe to move, so that there is a large gap between the water outlet pipe and the water storage bottle, which may affect the water intake of the water storage bottle; if the water storage bottle facing the water outlet pipe is moved away by a moving mechanism before cleaning so that the water outlet pipe is located between two adjacent water storage bottles, the operation is relatively complicated, but there is no need to leave a gap between the water outlet pipe and the water storage bottle for the water supply and drainage pipe to move, and the gap between the water outlet pipe and the water storage bottle can be controlled within a smaller range, which can better collect water samples.

[0018] As a further configuration of the present invention, the moving mechanism includes an annular slide rail, an annular synchronous belt, a synchronous pulley meshing with the synchronous belt, and a synchronous pulley motor controlling the rotation of the synchronous pulley. The moving seat is arranged on the slide rail and is slidably connected to the slide rail. The moving seat is fixed to the synchronous belt.

[0019] The above scheme has the advantages of simple structure, no sliding, high efficiency, smooth operation, wear resistance, simple maintenance, strong adaptability and strong load capacity.

[0020] As a further configuration of the present invention, a support frame is provided on the hull, the water pump is arranged on the support frame, and the water pump is located above the movable pipe.

[0021] By adopting the above solution, water can be better moved to the water storage bottle, and the upper side of the movable tube refers to the side of the movable tube away from the ground when the present invention is actually used.

[0022] As a further configuration of the present invention, a notch is provided on the inner wall of the through hole for the rack to move along the axial direction of the through hole.

[0023] By adopting the above scheme, the gap between the through hole and the movable tube can be reduced to prevent the movable tube from shifting to one side. At the same time, the notch plays a certain limiting role to prevent the movable tube from rotating along its own circumferential direction in the through hole, ensuring that the movable tube moves along its own axial direction driven by the gear.

[0024] As a further configuration of the present invention, an isolation end is provided at one end of the movable tube away from the water pump. The isolation end is annular and surrounds the pipe opening of the hose away from the water pump. A coarse filtering hole is provided on the isolation end.

[0025] By adopting the above scheme, when sampling at a location where aquatic plants are dense and / or there is a lot of garbage, the isolation end can to a certain extent prevent aquatic plants and / or garbage from surrounding the pipe mouth of the hose away from the water pump, isolating a certain sampling space to facilitate sampling.

[0026] As a further configuration of the present invention, a hollow counterweight end is provided at one end of the hose away from the water pump, the counterweight end is completely located in the isolation end, the interior of the hose is connected to the interior of the counterweight end, and the counterweight end is provided with fine filtering holes.

[0027] The above solution is adopted to facilitate sampling, and the fine filter holes can further prevent garbage and water plants in the water from entering the hose. Preferably, the counterweight end is threadedly connected to the hose, and the counterweight end can be removed according to sampling requirements.

[0028] As a further configuration of the present invention, a roller rotatably connected to the hull is provided on the hull, and an outer wall of the roller abuts against an outer wall of the movable tube.

[0029] The above solution plays an auxiliary role, so that the movable tube can move along its own axial direction better.

[0030] As a further configuration of the present invention, the hose and the movable tube are fixed via threads.

[0031] The above solution is adopted to facilitate disassembly and assembly, and ensure that the hose moves with the movable pipe.

[0032] As a further configuration of the present invention, a fixing seat is provided on the hull, the rotating shaft is passed through the fixing seat, a bearing is provided between the fixing seat and the rotating shaft, and the fixing seat and the rotating motor are respectively arranged on both sides of the gear.

[0033] By adopting the above solution, the gear can rotate stably and the movable tube can move stably along its own axis. The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Attached Figure 1 It is an overall schematic diagram of a specific embodiment of the present invention;

[0035] Attached Figure 2 It is a cross-sectional schematic diagram of a specific embodiment of the present invention;

[0036] Attached Figure 3 A schematic diagram of a through hole in a specific embodiment of the present invention;

[0037] Attached Figure 4 It is a partial isometric cross-sectional view of a specific embodiment of the present invention.

[0038] Hull 1, through hole 11, notch 111, guide rail 12, guide block 13, drain pipe 131, notch 1311, control motor 14, support frame 15, roller 16, fixed seat 17, movable tube 21, rack 211, isolation end 212, coarse filter hole 2121, hose 22, counterweight end 221, fine filter hole 2211, water pump 23, water outlet pipe 24, gear 25, rotating shaft 26, rotating motor 27, slide rail 31, synchronous belt 32, synchronous pulley 33, synchronous pulley motor 34, moving seat 4, fixed groove 41, water storage bottle 5. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0040] In the description of the present invention, it should be noted that, unless otherwise specified, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used in the description to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] Specific embodiments of the present invention are shown in the accompanying drawings.

[0042] A water quality detection sampling device comprises a hull 1, a sampling mechanism arranged on the hull 1 and a moving mechanism arranged on the hull 1, the hull 1 is provided with a through hole 11 extending to the bottom of the ship, the sampling mechanism comprises a movable tube 21, a hose 22, a water pump 23, a water outlet pipe 24, a gear 25, a rotating shaft 26 and a rotating motor 27 for controlling the rotation of the rotating shaft 26, the movable tube 21 is penetrated in the through hole 11 and the outer wall of the movable tube 21 is provided with a rack 211 arranged along the axial direction of the movable tube 21, the gear 25 is meshed with the rack 211, the gear 25 is fixed on the rotating shaft 26 and is coaxially arranged with the rotating shaft 26, the rotating motor 27 is arranged on the hull 1, the hose 22 is penetrated in the movable tube 21 and the hose 22 and the movable tube 21 are detachably fixed, the water pump 23 and the water outlet pipe 24 are both fixed on the hull 1, the hose 22 is connected to the water inlet of the water pump 23, and the water outlet pipe 24 is connected to the water outlet of the water pump 23. In this embodiment, five movable seats 4 are provided on the hull 1 and moved by a movable mechanism. The movable seats 4 are provided with a fixed groove 41, and a water storage bottle 5 is provided in the fixed groove 41. When the water storage bottle 5 is moved to the point closest to the water outlet pipe 24 by the movable mechanism, the pipe mouth of the water outlet pipe 24 away from the water pump 23 is directly opposite to the bottle mouth of the water storage bottle 5.

[0043] The hull 1 is provided with a guide rail 12, and the guide rail 12 is provided with a guide block 13 and a control motor 14 for controlling the guide block 13 to move along the guide rail 12. The guide block 13 includes an inclined drain pipe 131, and the end of the drain pipe 131 close to the outlet pipe 24 is higher than the end away from the outlet pipe 24. "Higher" means that when the embodiment is actually used, the end of the drain pipe 131 away from the outlet pipe 24 is inclined toward the direction close to the water surface. A notch 1311 is provided at the end of the drain pipe 131 close to the outlet pipe 24, and the end of the drain pipe 131 away from the outlet pipe 24 is always located outside the hull 1; when the drain pipe 131 moves to the nearest to the outlet pipe 24 under the action of the control motor 14, the notch 1311 is directly opposite to the pipe opening of the outlet pipe 24 away from the water pump 23.

[0044] A control center is provided in the hull 1, and the operator controls the control center through a remote controller to make the present embodiment perform sampling operations. When sampling is required, the hull 1 is moved to a suitable sampling position in the water area through the remote controller, and the water storage bottle 5 is moved to the point directly below the outlet pipe 24 away from the nozzle of the water pump 23 through the moving mechanism, and then the rotating motor 27 is turned on to control the movable tube 21 to move underwater to a suitable position through the gear 25, and then the water pump 23 is turned on to allow the water at the nozzle of the hose 22 away from the water pump 23 to enter the hose 22 and flow into the water storage bottle 5 through the outlet pipe 24, and the first sampling is completed. Depending on the different water samples that need to be collected this time, the subsequent operations are also different, as shown below:

[0045] (1) If the sampling is to take multiple water samples at the same point and the same depth, the moving mechanism is started to move the adjacent water storage bottle 5 to the position just below the outlet pipe 24 away from the outlet of the water pump 23, and then the water pump 23 is turned on to perform sampling;

[0046] (2) If the sampling is to take multiple water samples at different points and the same depth, first control the hull 1 to move to the next sampling point, then clean the hose 22, the water pump 23 and the outlet pipe 24 to prevent the water at the previous point from being mixed into the water sample obtained at this point, so as to ensure the accuracy of the test result. After the cleaning is completed, the adjacent water storage bottle 5 is moved to the outlet pipe 24 away from the pipe mouth of the water pump 23 by the moving mechanism, and then the water pump 23 is turned on to sample the new point;

[0047] (3) If the sampling is to take multiple water samples at the same point and different depths, the rotating motor 27 is started, and the movable tube 21 is controlled to move along its own axis through the gear 25. After moving to a suitable position, the hose 22, the water pump 23 and the water outlet pipe 24 are cleaned. After the cleaning is completed, the adjacent water storage bottle 5 is moved to the outlet pipe 24 away from the pipe mouth of the water pump 23 through the moving mechanism, and then the water pump 23 is turned on to sample water at different depths;

[0048] (4) If the sampling is to take multiple water samples from different points and depths, first sample the water at the same point and different depths, then move the hull 1 to the next point, and then sample the water at different depths at the next point. The sampling steps are consistent with (3).

[0049] The specific cleaning steps are as follows: when the hose 22, the water pump 23 and the water outlet pipe 24 are cleaned, the water storage bottle 5 facing the water outlet pipe 24 is first moved away by the moving mechanism, so that the water outlet pipe 24 is located between two adjacent water storage bottles 5, and the guide block 13 moves along the guide rail 12 to the direction close to the water outlet pipe 24 under the action of the control motor 14, until the gap 1311 faces the water outlet pipe 24 away from the pipe mouth of the water pump 23, and then the water pump 23 is turned on, so that the water at the new sampling position flushes the water remaining in the hose 22, the water pump 23 and the drain pipe 131 during the last sampling, flows into the drain pipe 131 through the gap 1311 and is discharged. In order to ensure the cleaning effect, the water pump 23 is turned on for 3 to 5 seconds from the time when water is discharged from the drain pipe 131. There is no need to leave a gap between the water outlet pipe 24 and the water storage bottle 5 for the water outlet pipe 131 to move, and the gap between the water outlet pipe 24 and the water storage bottle 5 can be controlled within a smaller range, so that water samples can be better collected.

[0050] Compared with the prior art, this embodiment can adapt to water areas of different widths, is more convenient for operators to operate, and can obtain water samples from different points and / or different depths in batches, so that the obtained water samples are closer to the real water body, and the detection results can better reflect the real condition of the water body.

[0051] The movable tube 21 of this embodiment is made of hard material, such as engineering plastics. The hose 22 has sufficient margin, so that the hose 22 always remains connected to the water pump 23 during the movement of the movable tube 21. The rotating motor 27 is a motor with a self-locking function.

[0052] The moving mechanism includes an annular slide rail 31, an annular synchronous belt 32, a synchronous pulley 33 meshed with the synchronous belt 32, and a synchronous pulley motor 34 for controlling the rotation of the synchronous pulley 33. The moving seat 4 is arranged on the slide rail 31 and is slidably connected to the slide rail 31. The moving seat 4 is fixed to the synchronous belt 32. The moving mechanism of the present invention has the advantages of simple structure, no slip, high efficiency, stable operation, wear resistance, simple maintenance, strong adaptability, strong load capacity, etc.

[0053] The hull 1 is provided with a support frame 15, and a water pump 23 is arranged on the support frame 15, and the water pump 23 is located above the movable tube 21. The position of the water pump 23 can better move water to the water storage bottle 5, and the above the movable tube 21 refers to the side of the movable tube 21 away from the ground when the present embodiment is actually used.

[0054] The inner wall of the through hole 11 is provided with a notch 111 for the rack 211 to move along the axial direction of the through hole 11. The gap between the through hole 11 and the movable tube 21 can be reduced to prevent the movable tube 21 from deviating to one side. At the same time, the notch 111 plays a certain limiting role to prevent the movable tube 21 from rotating along its own circumferential direction in the through hole 11, and ensure that the movable tube 21 moves along its own axial direction under the drive of the gear 25.

[0055] The hull 1 is provided with a roller 16 rotatably connected to the hull 1 , and the outer wall of the roller 16 abuts against the outer wall of the movable tube 21 , which can play an auxiliary role and enable the movable tube 21 to move better along its own axial direction.

[0056] The hose 22 is fixed to the movable tube 21 by threads, which facilitates disassembly and assembly, and ensures that the hose 22 moves with the movable tube 21.

[0057] An isolation end 212 is provided at one end of the movable tube 21 away from the water pump 23. The isolation end 212 is annular and surrounds the pipe opening of the hose 22 away from the water pump 23. A coarse filtering hole 2121 is provided on the isolation end 212. When sampling at a location where aquatic plants are dense and / or there is a lot of garbage, the isolation end 212 can prevent aquatic plants and / or garbage from surrounding the pipe opening of the hose 22 away from the water pump 23 to a certain extent, isolate a certain sampling space, and facilitate sampling.

[0058] A hollow counterweight end 221 is provided at one end of the hose 22 away from the water pump 23. The counterweight end 221 is completely located in the isolation end 212. The interior of the hose 22 is connected to the interior of the counterweight end 221. The counterweight end 221 is provided with a fine filter hole 2211. The fine filter hole 2211 can further prevent garbage and aquatic plants in the water from entering the hose 22. In this embodiment, the counterweight end 221 is threadedly connected to the hose 22, and the counterweight end 221 can be removed according to sampling requirements.

[0059] The hull 1 is provided with a fixed seat 17, a rotating shaft 26 is passed through the fixed seat 17, a bearing is provided between the fixed seat 17 and the rotating shaft 26, and the fixed seat 17 and the rotating motor 27 are respectively arranged on both sides of the gear 25. The gear 25 rotates stably, and the movable tube 21 moves stably along its own axis direction.

[0060] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art may adopt other various specific implementation modes to implement the present invention based on the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A water quality detection sampling device, characterized in that: The invention comprises a hull, a sampling mechanism arranged on the hull and a moving mechanism arranged on the hull, wherein the hull is provided with a through hole extending to the bottom of the hull, the sampling mechanism comprises a movable tube, a hose, a water pump, a water outlet pipe, a gear, a rotating shaft and a rotating motor for controlling the rotation of the rotating shaft, the movable tube is passed through the through hole and the outer wall of the movable tube is provided with a rack arranged along the axial direction of the movable tube, the gear is meshed with the rack, the gear is fixed on the rotating shaft and is arranged coaxially with the rotating shaft, the rotating motor is arranged on the hull, the hose is passed through the movable tube and the hose It is detachably fixed to the movable pipe, the water pump and the water outlet pipe are both fixed on the hull, the hose is connected to the water inlet of the water pump, the water outlet pipe is connected to the water outlet of the water pump, the hull is provided with at least two movable seats moved by a movable mechanism, the movable seat is provided with a fixed groove, and a water storage bottle is provided in the fixed groove; when the water storage bottle is moved to the point closest to the water outlet pipe by the movable mechanism, the pipe mouth of the water outlet pipe away from the water pump faces the bottle mouth of the water storage bottle, and the hull is provided with a drainage structure that allows the fluid passing through the water outlet pipe to leave the hull.

2. A water quality detection sampling device according to claim 1, characterized in that: The drainage structure includes a guide rail, a guide block and a control motor that controls the guide block to move along the guide rail. The guide block includes an inclined drainage pipe, the end of the drainage pipe close to the outlet pipe is higher than the end away from the outlet pipe, a notch is provided at one end of the drainage pipe close to the outlet pipe, and the end of the drainage pipe away from the outlet pipe is always located outside the hull; when the drainage pipe moves to the closest position to the outlet pipe under the action of the control motor, the notch is opposite to the pipe mouth of the outlet pipe away from the water pump.

3. A water quality detection sampling device according to claim 2, characterized in that: The moving mechanism includes an annular slide rail, an annular synchronous belt, a synchronous pulley meshed with the synchronous belt, and a synchronous pulley motor for controlling the rotation of the synchronous pulley. The moving seat is arranged on the slide rail and slidably connected to the slide rail. The moving seat is fixed to the synchronous belt.

4. A water quality detection sampling device according to claim 3, characterized in that: A support frame is provided on the hull, and the water pump is arranged on the support frame. The water pump is located above the movable pipe.

5. A water quality detection sampling device according to claim 4, characterized in that: The inner wall of the through hole is provided with a notch for the rack to move along the axial direction of the through hole.

6. A water quality detection sampling device according to claim 3, 4 or 5, characterized in that: An isolation end is arranged at one end of the movable tube away from the water pump. The isolation end is annular and surrounds the pipe opening of the hose away from the water pump. A coarse filtering hole is arranged on the isolation end.

7. A water quality detection sampling device according to claim 6, characterized in that: A hollow counterweight end is arranged at one end of the hose away from the water pump. The counterweight end is completely located in the isolation end. The interior of the hose is communicated with the interior of the counterweight end. Fine filtering holes are arranged on the counterweight end.

8. A water quality detection sampling device according to claim 7, characterized in that: The hull is provided with a roller rotatably connected to the hull, and the outer wall of the roller abuts against the outer wall of the movable tube.

9. A water quality detection sampling device according to claim 8, characterized in that: The hose is fixed to the movable tube via threads.

10. A water quality detection sampling device according to claim 9, characterized in that: A fixing seat is arranged on the hull, the rotating shaft is passed through the fixing seat, a bearing is arranged between the fixing seat and the rotating shaft, and the fixing seat and the rotating motor are respectively arranged on both sides of the gear.

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