Continuous water sampling device for nitrate detection

Abstract

The utility model discloses a continuous water sampling device for nitrate detection, which relates to the technical field of water quality detection and sampling equipment and comprises a bottom plate, a movable plate, a metering pump, a butt joint pipe, an L-shaped water outlet pipe, a vertical fixed plate, a fixed pipe, a light hose, a hose fixing piece, a remote control unmanned boat, a small winch, a plumb bob, a matching ring, a movable component and a sampling component. A moving assembly is arranged on the upper surface of the bottom plate, a movable plate is arranged on the moving assembly, a metering pump is arranged on the movable plate, a butt joint pipe is arranged at a water suction opening in one end of the metering pump, an L-shaped water outlet pipe is arranged at a water outlet in the other end of the metering pump, and a sampling assembly is arranged on the L-shaped water outlet pipe. A vertical fixing plate corresponding to the butt joint pipe is vertically arranged on the upper surface of the bottom plate, and three fixing pipes are evenly arranged on the side face of the vertical fixing plate at equal intervals. The water sampling device has the advantage of being capable of quickly and conveniently sampling water samples.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection sampling equipment, in particular to a continuous water sampling device for nitrate detection. Background Art

[0002] Water quality monitoring is the process of monitoring and measuring the types, concentrations, and changing trends of pollutants in water bodies to evaluate water quality. The monitoring scope is very broad, including both uncontaminated and contaminated natural water and various industrial wastewaters. Nitrates and nitrites are common water pollutants that can degrade water quality and affect the growth of aquatic animals in reservoirs. Therefore, the concentrations of nitrates and nitrites in water are a key component of water quality testing. Before testing reservoir water, it is usually necessary to sample water from different locations within the reservoir using a sampling device.

[0003] However, the existing technology still has shortcomings during use: traditional water sampling devices are difficult to perform fixed-depth and interval sampling in deep water areas such as reservoirs. Currently, sampling is mainly carried out using sampling ropes, which cannot achieve sampling under the same environmental conditions in a short period of time. It is easy to cause fluctuations in the impact of external environmental changes on the composition of water samples. At the same time, the sampling time is generally long, and it takes a long time to complete a round of interval sampling. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a continuous water sampling device for nitrate detection to solve the problems raised in the above background technology. The present invention has the advantage of being able to quickly and conveniently perform water sampling.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a continuous water sampling device for nitrate detection, comprising a bottom plate, a movable plate, a metering pump, a butt joint pipe, an L-shaped water outlet pipe, a vertical fixed plate, a fixed pipe, a lightweight hose, a hose fixing plate, a remote-controlled unmanned boat, a small winch, a plumb bob, a matching ring, a moving assembly and a sampling assembly, wherein the upper surface of the bottom plate is provided with a moving assembly, and the movable plate is provided on the moving assembly, the metering pump is provided on the movable plate, a butt joint pipe is provided at the water inlet at one end of the metering pump, an L-shaped water outlet pipe is provided at the water outlet at the other end of the metering pump, a sampling assembly is provided on the L-shaped water outlet pipe, a vertical fixed plate corresponding to the butt joint pipe is vertically provided on the upper surface of the bottom plate, and the vertical fixed plate Three fixed tubes are evenly arranged on the side at equal distances, and the fixed tubes cooperate with the butt-joint tubes, and a matching ring corresponding to the butt-joint tube is arranged inside the fixed tubes, and a lightweight hose is provided at the water inlet of the fixed tube, and the length of the lightweight hose is long enough, and the water suction ends of the three lightweight hoses are fixed by a hose fixing piece, and the lengths of the three lightweight hoses under the hose fixing piece are different, and a plumb bob is provided on the hose fixing piece, and a remote-controlled unmanned boat is provided on the side of the hose fixing piece, and a small winch is provided on the remote-controlled unmanned boat, and the small winch is fixedly connected to the hose fixing piece by a rope. When it is necessary to sample water samples in the reservoir, the remote-controlled unmanned boat is first placed on the water surface of the reservoir to be sampled, and the sampling personnel on the shore use a remote control device to remotely control the remote control. The unmanned boat is remotely controlled until it moves to the position where sampling is required. The small winch is controlled by the remote control device to continuously lower the rope. As the rope gradually becomes longer, the plumb bob can drive the hose fixing piece to gradually move downward, and the hose fixing piece drives the three lightweight hoses to move downward until they move to the depth where sampling is required. Since the water intake ends of the three lightweight hoses are arranged according to the sampling intervals at different depths, fixed-depth and interval sampling can be performed. The initial position of the butt joint is at the position connected to the fixed pipe at the bottom. When sampling is required, the metering pump is turned on and the metering pump works. The metering pump draws water through the fixed pipe and the lightweight hose, and the absorbed water enters the sampling bottle through the L-shaped outlet pipe, the telescopic pipe and the movable outlet pipe. After the sampling here is completed, the sampling bottle needs to be replaced, and the limit block is pulled upward, and the limit block drives the slide bar to move upward, and the slide bar drives the mounting block to move upward, and the mounting block drives the movable water outlet pipe to move upward, and the movable water outlet pipe compresses the telescopic pipe, and the sampling bottle is removed, and a new sampling bottle is placed on the sampling bottle placement table, and the limit block is released. Under the action of the spring, the mounting block moves downward, and the mounting block drives the movable water outlet pipe to move downward, and the movable water outlet pipe drives the telescopic pipe to extend until the mounting block contacts the new sampling bottle, and the crank handle is turned forward, and the crank handle drives the translation screw to rotate, and the translation screw drives the slider to move to a position away from the vertical fixed plate, and the slider drives the support table to move, and the support table drives the movable plate to move through the guide column, and the movable plate drives the metering pump to move.The metering pump drives the docking tube to move until it comes out of the fixed tube at the bottom. Then, the PLC controller is turned on. The PLC controller controls the output shaft of the motor to rotate a certain number of times. The output shaft of the motor drives the lifting screw to rotate a certain number of times. Then, the movable plate just drives the docking tube on the metering pump to the position corresponding to the fixed tube in the middle. The crank handle is turned in the opposite direction until the docking tube enters the fixed tube and contacts the matching ring in the fixed tube. Then, the metering pump is turned on. Water at different heights of the reservoir can be sampled through the fixed tube in the middle. The interval between the sampling and the last sampling is very short, which can ensure continuous sampling without the need to clean the lightweight hose. This allows sampling under the same environmental conditions in a short time, reducing the fluctuation of the water sample composition caused by changes in the external environment. The time consumption for completing a round of interval sampling is short, which greatly saves sampling time.

[0006] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The swing arm ends up being rotated by the hook portion. The swing arm ends up being rotated by the hook portion.

[0007] Furthermore, a crank is provided at the outer end of the translation screw, and the crank serves to facilitate and quickly rotate the translation screw.

[0008] Furthermore, a telescopic tube is provided at the lower end of the L-shaped water outlet pipe, and a movable water outlet pipe is provided at the lower end of the telescopic tube, and a sliding ear is provided on the side of the movable water outlet pipe, and a mounting block corresponding to the sliding ear is provided on the side of the movable water outlet pipe, and a sliding rod passing through the sliding ear is vertically provided on the upper surface of the mounting block, and a limiting block is provided at the upper end of the slide rod, and a spring is provided on the outer movable sleeve of the slide rod, and the spring is located between the sliding ear and the mounting block, and a sampling bottle placing table is provided on the side of the movable plate, and a sampling bottle is movably installed on the sampling bottle placing table, and the sampling bottle can be conveniently replaced by utilizing the mutual cooperation between the limiting block, the sliding rod, the spring, the mounting block, the movable water outlet pipe, the telescopic tube and the sliding ear.

[0009] Furthermore, a mounting ring that cooperates with the sampling bottle is provided on the side of the sampling bottle placement table, and the mounting ring facilitates the placement of the sampling bottle at a position that just corresponds to the movable water outlet pipe.

[0010] Furthermore, a soft sealing ring corresponding to the matching ring is provided at the end of the butt joint tube, and the soft sealing ring can enhance the sealing between the butt joint tube and the matching ring.

[0011] Furthermore, the lower surface of the base plate is provided with supporting legs, which can support the base plate.

[0012] Based on the above technical solution, the present invention provides a continuous water sampling device for nitrate detection, and the beneficial effects achieved through practical application are as follows:

[0013] The utility model utilizes the mutual cooperation among the guide column, the lifting screw, the motor and the translation screw. By rotating the translation screw forward or backward, the docking tube can be driven away from or close to the fixed tube. The output shaft of the motor drives the lifting screw to rotate, which can drive the docking tube to move upward, so that the docking tube can be conveniently and quickly connected to different fixed tubes. By utilizing the mutual cooperation among the lightweight hose, the hose fixing piece and the remote-controlled unmanned boat, the sampling personnel on the shore remotely control the remote-controlled unmanned boat through the remote control device, and control the small winch through the remote control device to continuously lower the rope. As the rope gradually becomes longer, the plumb bob can drive the hose The fixing plate gradually moves downward, and the hose fixing plate drives the three lightweight hoses to move downward until they move to the depth where sampling is required. Since the water intake ends of the three lightweight hoses are arranged according to sampling intervals at different depths, fixed-depth and interval sampling can be performed, which can ensure continuous sampling without the need to clean the lightweight hoses, thereby achieving sampling under the same environmental conditions in a short time, reducing fluctuations in the composition of water samples caused by changes in the external environment, and completing a round of interval sampling in a short time, greatly saving sampling time. The water samples taken can be used to detect the concentrations of nitrate and nitrite in the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main three-dimensional structure of the utility model.

[0015] Figure 2 For this utility model Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0016] Figure 3 It is a schematic diagram of the side-view three-dimensional structure of the utility model.

[0017] Figure 4 This is a schematic diagram of the main three-dimensional structure of the utility model after removing the mobile sampling component.

[0018] Figure 5 This is a side view of the three-dimensional structure of the utility model after removing the mobile sampling component.

[0019] Figure 6 This is a schematic diagram of the main three-dimensional structure of the mobile sampling assembly of the present invention.

[0020] In the figure: 1 base plate, 2 legs, 3 support plate, 4 sliding column, 5 slider, 6 support platform, 7 crank, 8 movable plate, 9 guide column, 10 lifting screw, 11 metering pump, 12 docking pipe, 13 L-shaped water outlet pipe, 14 sampling bottle placement table, 15 sampling bottle, 16 vertical fixing plate, 17 fixing pipe, 18 lightweight hose, 19 hose fixing plate, 20 remote-controlled unmanned boat, 21 small winch, 22 plumb bob, 23 limit block, 24 sliding rod, 25 spring, 26 mounting block, 27 movable water outlet pipe, 28 telescopic pipe, 29 sliding ear, 30 mounting ring, 31 PLC controller, 32 motor, 33 translation screw, 34 soft sealing ring, 35 matching ring. DETAILED DESCRIPTION

[0021] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-6, this embodiment provides a technical solution: a continuous water sampling device for nitrate detection, comprising a bottom plate 1, a movable plate 8, a metering pump 11, a butt joint pipe 12, an L-shaped water outlet pipe 13, a vertical fixed plate 16, a fixed pipe 17, a lightweight hose 18, a hose fixing plate 19, a remote-controlled unmanned boat 20, a small winch 21, a plumb bob 22, a matching ring 35, a moving component and a sampling component, a moving component is provided on the upper surface of the bottom plate 1, and a movable plate 8 is provided on the moving component, a metering pump 11 is provided on the movable plate 8, a butt joint pipe 12 is provided at one end of the water inlet of the metering pump 11, an L-shaped water outlet pipe 13 is provided at the other end of the water outlet of the metering pump 11, a sampling component is provided on the L-shaped water outlet pipe 13, and a vertical connection is provided on the upper surface of the bottom plate 1 The butt joint 12 corresponds to a vertical fixing plate 16, and three fixing tubes 17 are evenly arranged at equal distances on the side of the vertical fixing plate 16, and the fixing tube 17 cooperates with the butt joint 12, and a matching ring 35 corresponding to the butt joint 12 is provided inside the fixing tube 17. A lightweight hose 18 is provided at the water inlet of the fixing tube 17, and the length of the lightweight hose 18 is long enough. The water suction ends of the three lightweight hoses 18 are fixed by a hose fixing piece 19, and the lengths of the three lightweight hoses 18 below the hose fixing piece 19 are different. A plumb bob 22 is provided on the hose fixing piece 19, and a remote-controlled unmanned boat 20 is provided on the side of the hose fixing piece 19. A small winch 21 is provided on the remote-controlled unmanned boat 20, and the small winch 21 is fixedly connected to the hose fixing piece 19 through a rope. As a preferred embodiment, the lightweight hose 18 is made of polytetrafluoroethylene. When it is necessary to sample water in the reservoir, the remote-controlled unmanned boat 20 is first placed on the surface of the reservoir to be sampled. The sampling personnel on the shore remotely control the remote-controlled unmanned boat 20 through a remote control device until the remote-controlled unmanned boat 20 moves to the position where sampling is required. The small winch 21 is controlled by the remote control device to continuously lower the rope. As the rope gradually becomes longer, the plumb bob 22 can drive the hose fixing piece 19 to gradually move downward. The hose fixing piece 19 drives the three lightweight hoses 18 to move downward until they move to the depth where sampling is required. Since the water intake ends of the three lightweight hoses 18 are arranged according to the sampling intervals of different depths, fixed depth can be performed. , spacing sampling, the initial position of the butt joint 12 is at the position connected to the fixed tube 17 at the bottom. When sampling is needed, the metering pump 11 is turned on and the metering pump 11 works. The metering pump 11 absorbs water through the fixed tube 17 and the lightweight hose 18, and the absorbed water enters the sampling bottle 15 through the L-shaped water outlet pipe 13, the telescopic tube 28 and the movable water outlet pipe 27. After completing the sampling here, the sampling bottle 15 needs to be replaced, and the limit block 23 is pulled upward. The limit block 23 drives the slide bar 24 to move upward, and the slide bar 24 drives the mounting block 26 to move upward. The mounting block 26 drives the movable water outlet pipe 27 to move upward, and the movable water outlet pipe 27 compresses the telescopic tube 28, removes the sampling bottle 15, and places the new sampling bottle 15 on the sampling bottle placement table 14.Release the limit block 23. Under the action of the spring 25, the mounting block 26 moves downward, and the mounting block 26 drives the movable water outlet pipe 27 to move downward. The movable water outlet pipe 27 drives the telescopic tube 28 to extend until the mounting block 26 contacts the new sampling bottle 15. Then, turn the crank 7 forward. The crank 7 drives the translation screw 33 to rotate. The translation screw 33 drives the slider 5 to move toward a position away from the vertical fixed plate 16. The slider 5 drives the support table 6 to move. The support table 6 drives the movable plate 8 to move through the guide column 9. The movable plate 8 drives the metering pump 11 to move. The metering pump 11 drives the docking tube 12 to move. Until the docking tube 12 is out of the fixed tube 17 at the lower end, turn on the PLC controller 31. The PLC controller 31 controls the output shaft of the motor 32 to rotate a certain circle. After the output shaft of the motor 32 drives the lifting screw 10 to rotate a certain number of times, the movable plate 8 just drives the connecting pipe 12 on the metering pump 11 to move to the position corresponding to the fixed pipe 17 in the middle. The crank handle 7 is rotated in the opposite direction until the connecting pipe 12 enters the fixed pipe 17 and contacts the matching ring 35 in the fixed pipe 17. The metering pump 11 is turned on and water at different heights of the reservoir can be sampled through the fixed pipe 17 in the middle. The time interval between the previous sampling is very short, which can ensure continuous sampling and does not require cleaning of the lightweight hose 18. Sampling under the same environmental conditions can be achieved in a short time, reducing the fluctuation of the water sample composition caused by changes in the external environment. The time consumption for completing a round of interval sampling is very short, which greatly saves sampling time.

[0023] Furthermore, two corresponding supporting plates 3 are provided on the upper surface of the bottom plate 1, and a slider 5 is movably provided between the two supporting plates 3. A support platform 6 is provided on the upper end of the slider 5. A slide column 4 is horizontally provided on the inner side of the support plate 3 and passes through the slider 5. A translation screw 33 is rotatably provided on the side of the support plate 3 through a bearing. The translation screw 33 passes through the slider 5 and is threadedly connected to the slider 5. A motor 32 is vertically provided on the upper surface of one end of the support platform 6, and a lifting screw 10 that passes through the movable plate 8 is vertically provided on the end of the output shaft of the motor 32. , and the lifting screw 10 is threadedly connected to the movable plate 8, a guide column 9 is vertically provided on the upper surface of the support platform 6 and passes through the movable plate 8, and a PLC controller 31 is provided on the upper surface of the support platform 6. By utilizing the mutual cooperation between the support plate 3, the sliding column 4, the slider 5, the support platform 6, the guide column 9, the lifting screw 10, the PLC controller 31, the motor 32 and the translation screw 33, the docking tube 12 can be conveniently moved; the outer end of the translation screw 33 is provided with a crank 7, which serves to facilitate the rapid rotation of the translation screw 33.

[0024] Furthermore, a telescopic tube 28 is provided at the lower end of the L-shaped water outlet pipe 13, a movable water outlet pipe 27 is provided at the lower end of the telescopic tube 28, a sliding ear 29 is provided on the side of the L-shaped water outlet pipe 13, and a mounting block 26 corresponding to the sliding ear 29 is provided on the side of the movable water outlet pipe 27. A sliding rod 24 passing through the sliding ear 29 is vertically provided on the upper surface of the mounting block 26. A limiting block 23 is provided on the upper end of the sliding rod 24. A spring 25 is provided on the outer movable sleeve of the sliding rod 24, and the spring 25 is located between the sliding ear 29 and the mounting block 26. A sampling bottle placement platform 14 is provided on the side of the movable plate 8, and a sampling bottle 15 is movably installed on the sampling bottle placement platform 14. The sampling bottle 15 can be conveniently replaced by utilizing the mutual cooperation between the limit block 23, the slide rod 24, the spring 25, the mounting block 26, the movable water outlet pipe 27, the telescopic tube 28 and the sliding ear 29; a mounting ring 30 that cooperates with the sampling bottle 15 is provided on the side of the sampling bottle placement platform 14, and the mounting ring 30 facilitates the placement of the sampling bottle 15 in a position that just corresponds to the movable water outlet pipe 27.

[0025] Furthermore, a soft sealing ring 34 is provided at the end of the butt joint 12, which corresponds to the mating ring 35. The soft sealing ring 34 can enhance the sealing between the butt joint 12 and the mating ring 35; a support leg 2 is provided on the lower surface of the base plate 1, which can support the base plate 1; the metering pump 11, remote-controlled unmanned boat 20, small winch 21, PLC controller 31 and motor 32 mentioned in this specification are all mature technologies in the existing technology, and their specific structures and working principles will not be explained in detail one by one.

[0026] The working principle of the continuous water sampling device for nitrate detection provided by the present invention is as follows: when it is necessary to sample the water sample in the reservoir, the remote-controlled unmanned boat 20 is first placed on the water surface of the reservoir to be sampled, and the sampling personnel on the shore remotely control the remote-controlled unmanned boat 20 through the remote control device until the remote-controlled unmanned boat 20 moves to the position where sampling is required, and then the small winch 21 is controlled by the remote control device to continuously lower the rope. As the rope gradually becomes longer, the plumb bob 22 can drive the hose fixing piece 19 to gradually move downward, and the hose fixing piece 19 drives the three lightweight hoses 18 to move downward until they move to the depth where sampling is required. Since the water intake ends of the three lightweight hoses 18 are arranged according to the sampling intervals of different depths, Fixed-depth and spacing sampling can be carried out. The initial position of the butt joint 12 is at the position connected to the fixed pipe 17 at the lower end. When sampling is needed, the metering pump 11 is turned on and the metering pump 11 works. The metering pump 11 absorbs water through the fixed pipe 17 and the lightweight hose 18. The absorbed water enters the sampling bottle 15 through the L-shaped water outlet pipe 13, the telescopic pipe 28 and the movable water outlet pipe 27. After completing the sampling here, the sampling bottle 15 needs to be replaced. The limit block 23 is pulled upward, and the limit block 23 drives the slide bar 24 to move upward. The slide bar 24 drives the mounting block 26 to move upward. The mounting block 26 drives the movable water outlet pipe 27 to move upward. The movable water outlet pipe 27 compresses the telescopic pipe 28, removes the sampling bottle 15, and places the new sampling bottle 15 on the sampling bottle. Place it on the table 14, loosen the limit block 23, and under the action of the spring 25, the mounting block 26 moves downward, and the mounting block 26 drives the movable water outlet pipe 27 to move downward, and the movable water outlet pipe 27 drives the telescopic tube 28 to extend, until the mounting block 26 contacts the new sampling bottle 15, turn the crank 7 forward, and the crank 7 drives the translation screw 33 to rotate, and the translation screw 33 drives the slider 5 to move to a position away from the vertical fixed plate 16, and the slider 5 drives the support table 6 to move, and the support table 6 drives the movable plate 8 to move through the guide column 9, and the movable plate 8 drives the metering pump 11 to move, and the metering pump 11 drives the docking pipe 12 to move, until the docking pipe 12 is out of the fixed pipe 17 at the lower end, turn on the PLC controller 31, and the PLC controller 31 controls the motor 32 After the output shaft rotates a certain number of circles and the output shaft of the motor 32 drives the lifting screw 10 to rotate a certain number of circles, the movable plate 8 just drives the docking tube 12 on the metering pump 11 to move to the position corresponding to the fixed tube 17 in the middle, and the crank 7 is rotated in the opposite direction until the docking tube 12 enters the fixed tube 17 and contacts the matching ring 35 in the fixed tube 17. Then, the metering pump 11 is turned on, and water at different heights of the reservoir can be sampled through the fixed tube 17 in the middle. The time interval between the sampling and the last sampling is very short, which can ensure continuous sampling and does not require cleaning of the lightweight hose 18, thereby achieving sampling under the same environmental conditions in a short time, reducing the fluctuation of the water sample composition caused by changes in the external environment, and completing a round of interval sampling in a short time.Greatly saves sampling time.

[0027] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A continuous water sampling device for nitrate detection, characterized by: The invention comprises a bottom plate (1), a movable plate (8), a metering pump (11), a butt joint pipe (12), an L-shaped water outlet pipe (13), a vertical fixed plate (16), a fixed pipe (17), a light hose (18), a hose fixing plate (19), a remote-controlled unmanned boat (20), a small winch (21), a plumb bob (22), a matching ring (35), a moving assembly and a sampling assembly, wherein the upper surface of the bottom plate (1) is provided with a moving assembly, and the movable plate (8) is provided on the moving assembly, the movable plate (8) is provided with a metering pump (11), a butt joint pipe (12) is provided at one end of the water inlet of the metering pump (11), an L-shaped water outlet pipe (13) is provided at the other end of the water outlet of the metering pump (11), and a sampling assembly is provided on the L-shaped water outlet pipe (13), and a vertical fixed plate (16) corresponding to the butt joint pipe (12) is provided vertically on the upper surface of the bottom plate (1). ), three fixed tubes (17) are evenly arranged at equal distances on the side of the vertical fixed plate (16), and the fixed tubes (17) cooperate with the butt-joint tube (12), and a matching ring (35) corresponding to the butt-joint tube (12) is arranged inside the fixed tube (17), and a lightweight hose (18) is provided at the water inlet of the fixed tube (17), and the length of the lightweight hose (18) is long enough, and the water suction ends of the three lightweight hoses (18) are fixed by a hose fixing plate (19), and the lengths of the three lightweight hoses (18) below the hose fixing plate (19) are different, and a plumb bob (22) is provided on the hose fixing plate (19), and a remote-controlled unmanned boat (20) is provided on the side of the hose fixing plate (19), and a small winch (21) is provided on the remote-controlled unmanned boat (20), and the small winch (21) is fixedly connected to the hose fixing plate (19) through a rope.

2. A continuous water sampling device for nitrate detection according to claim 1, characterized in that: The upper surface of the base plate (1) is provided with two corresponding supporting plates (3), a slider (5) is movably provided between the two supporting plates (3), a support platform (6) is provided on the upper end of the slider (5), a sliding column (4) is horizontally provided on the inner side of the support plate (3) and passes through the slider (5), a translation screw (33) is rotatably provided on the side of the support plate (3) through a bearing, the translation screw (33) passes through the slider (5), and the translation screw (33) is threadedly connected to the slider (5), a motor (32) is vertically provided on the upper surface of one end of the support platform (6), a lifting screw (10) is vertically provided on the output shaft end of the motor (32) and passes through the movable plate (8), and the lifting screw (10) is threadedly connected to the movable plate (8), a guide column (9) is vertically provided on the upper surface of the support platform (6) and passes through the movable plate (8), and a PLC controller (31) is provided on the upper surface of the support platform (6).

3. A continuous water sampling device for nitrate detection according to claim 2, characterized in that: The outer end of the translation screw (33) is provided with a crank (7).

4. The continuous water sampling device for nitrate detection according to claim 1, characterized in that: The lower end of the L-shaped water outlet pipe (13) is provided with a telescopic tube (28), the lower end of the telescopic tube (28) is provided with a movable water outlet pipe (27), the side of the L-shaped water outlet pipe (13) is provided with a sliding ear (29), the side of the movable water outlet pipe (27) is provided with a mounting block (26) corresponding to the sliding ear (29), the upper surface of the mounting block (26) is vertically provided with a sliding rod (24) passing through the sliding ear (29), the upper end of the sliding rod (24) is provided with a limiting block (23), the outer movable sleeve of the sliding rod (24) is provided with a spring (25), and the spring (25) is located between the sliding ear (29) and the mounting block (26), the side of the movable plate (8) is provided with a sampling bottle placement table (14), and the sampling bottle (15) is movably mounted on the sampling bottle placement table (14).

5. A continuous water sampling device for nitrate detection according to claim 4, characterized in that: A mounting ring (30) that cooperates with the sampling bottle (15) is provided on the side of the sampling bottle placement platform (14).

6. The continuous water sampling device for nitrate detection according to claim 1, characterized in that: The end of the butt-jointed pipe (12) is provided with a soft sealing ring (34) corresponding to the matching ring (35).

7. The continuous water sampling device for nitrate detection according to claim 1, characterized in that: The lower surface of the bottom plate (1) is provided with supporting legs (2).

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