Water environment sampling device and use method thereof

Abstract

The invention relates to a water environment sampling device, and belongs to the technical field of water environment monitoring. A vertical transmission mechanism is connected to the lower surface of a floating plate, and a movable part of the vertical transmission mechanism is connected with a movable plate; mounting grooves are formed in the two sides of the movable plate, and two channels are arranged between the two mounting grooves; a vertical fixing plate is fixedly mounted on each mounting groove, the upper end and the lower end of each fixing plate are rotationally connected with a two-way lead screw, the upper end of each two-way lead screw is sleeved with a belt pulley, and a transmission belt sequentially bypasses the channel and is jointly connected with the belt pulleys of the two two-way lead screws; the upper end of one of the two-way lead screws is fixedly connected with an operating hand wheel; each bidirectional lead screw is in threaded connection with a plurality of movable seats, and each movable seat is movably connected with a water sample collecting mechanism. According to the environment sampling device, the depth in water of the sampling cylinders can be electrically controlled, and meanwhile, the relative distance of the sampling cylinders at relative positions can be manually adjusted in advance, so that water samples at required water layer intervals are controlled, multi-water-layer water sampling work at different time periods is facilitated, and the practicability is improved.

Description

Technical Field

[0001] The invention relates to a water environment sampling device and a use method thereof, belonging to the technical field of water environment monitoring. Background Art

[0002] Water environment refers to the space where water is formed, distributed and transformed in nature. It refers to the natural space surrounding the human population and the water bodies that can directly or indirectly affect human life and development, and the overall natural factors and related social factors of its normal function. Some also refer to the space where relatively stable natural waters with land as the boundary are located. The water environment is mainly composed of two parts: surface water environment and groundwater environment. The surface water environment includes rivers, lakes, reservoirs, oceans, ponds, swamps, glaciers, etc. The groundwater environment includes springs, shallow groundwater, deep groundwater, etc. The water environment is one of the basic elements of the environment. It is an important place for human society to survive and develop, and it is also the area most disturbed and damaged by humans. The pollution and destruction of the water environment has become one of the major environmental problems in the world today. Water environment monitoring is the process of monitoring and measuring the types of pollutants in water bodies, the concentrations of various pollutants and the changing trends, and evaluating the water quality. The method of detecting water pollution is usually to sample water layers at different depths of the water body, and then conduct various tests and comparisons on the samples, so as to understand the changes in the water system in a timely manner and obtain various data.

[0003] Although the water environment sampling device in the prior art can sample water layers of different depths in the water body, the spacing of the sampling tubes in the vertical direction is fixed and difficult to adjust according to demand, resulting in uncontrollable layer spacing when sampling water layers of different depths at the same time, which reduces practicality. Therefore, it is necessary to provide a water environment sampling device and a method of using the same to solve the above technical problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a water environment sampling device and a method of using the same. The environmental sampling device can electrically control the water depth of the sampling tube and manually adjust the relative distance of the relative position sampling tubes in advance, thereby controlling the water sampling of the required water layer spacing, which is helpful for water sampling in multiple water layers at different time periods and improves practicality.

[0005] In order to solve the above problems, the specific technical scheme of the present invention is as follows: a water environment sampling device, a vertical transmission mechanism is connected to the lower surface of the floating plate, and the movable part of the vertical transmission mechanism is connected to the movable plate; installation grooves are opened on both sides of the movable plate, and two channels are arranged between the two installation grooves; a vertical fixed plate is fixedly installed on each installation groove, and the upper and lower ends of the fixed plate are rotatably connected to a two-way screw, and the upper end of the two-way screw is sleeved with a pulley, and the transmission belt passes through the channel in turn and is connected to the pulleys of the two two-way screws; an operating handwheel is fixedly connected to the upper end of one of the two-way screws; a number of movable seats are threadedly connected to each two-way screw, and a water sample collection mechanism is movably connected to each movable seat.

[0006] The water sample collection mechanism comprises a sampling tube, and a water inlet pipe and a water outlet pipe are respectively arranged on the upper and lower parts of the sampling tube. A first electromagnetic valve is arranged on the water inlet pipe, and a second electromagnetic valve is arranged on the water outlet pipe.

[0007] Plug-in blocks are symmetrically arranged on both sides of the side end surface of the sampling tube, a groove is opened on the upper surface of the plug-in block, a reset spring is fixedly installed at the bottom of the inner cavity of the groove, and the upper end of the reset spring is fixedly connected to a block with an inclined surface on one side; U-shaped seats are respectively arranged on both sides of the movable seat, the U-shaped seat is plugged into the plug-in block, and is limited by the block.

[0008] A cleaning brush is provided inside the sampling barrel, and the outer surface of the bristles of the cleaning brush is completely in contact with the inner surface of the longitudinal section of the sampling barrel; a movable rod that penetrates the sampling barrel is fixedly installed on the inner side of the cleaning brush; an operating block is connected to the outer end face of the movable rod, and a tension spring is fixedly connected between the operating block and the sampling barrel, and the tension spring is located on the outer side of the movable rod, and one end of the tension spring is supported on the end face of the sampling barrel, and the other end is supported on the end face of the movable rod.

[0009] The vertical transmission mechanism consists of a screw, a guide column and a servo motor; the servo motor is arranged at the bottom center of the floating plate through a sealed motor box; the output shaft of the servo motor is connected to the screw, the screw is threadedly connected to the movable plate, and the guide columns are slidably matched on both sides of the movable plate, and the top of the guide column is connected to the bottom of the floating plate; the screw and the bottom of the guide column are jointly supported on the upper surface of the connecting block.

[0010] A counterweight cone is provided at the center of the lower surface of the connecting block.

[0011] A cavity box is fixedly installed on the upper surface of the floating plate, and a wireless transceiver module and a battery are fixedly installed inside the cavity box. The battery provides power for the wireless transceiver module and the vertical transmission mechanism, and the wireless transceiver module is connected to the power mechanism of the vertical transmission mechanism.

[0012] A drawstring is provided on the upper surface of the cavity box body.

[0013] The method for using the water environment sampling device is characterized by comprising the following steps: S1. Adjust the spacing of the three sampling tubes on the same side as needed. By turning the operating hand wheel, the two-way screw connected to it is driven to rotate. At the same time, the pulley and the transmission belt are used to make the two two-way screws rotate synchronously, thereby driving the two outer movable seats to drive the sampling tubes to move in opposite or opposite directions, so that the spacing of the three sampling tubes changes, which is used to collect river water at different depths at the same time; S2. The operator stands on the bridge and holds the pull rope, and immerses the water environment sampling device into the river water under the action of the counterweight mechanism, and the floating board floats on the river surface; S3, using a preset remote controller to control the servo motor to start, drive the screw connected to its output shaft to rotate, drive the outer movable plate to drive multiple sampling tubes connected through the bidirectional screw, fixed plate and movable seat to dive to the required depth at the same time; S4, setting the three sampling cylinders on the left side into a group, opening the first solenoid valve thereon, for collecting water samples at different water levels in the first time period; S5, setting the three sampling cylinders on the right side into another group, and also opening the first solenoid valve thereon, for collecting water samples at different water levels in the second time period; S6. After the water sampling is completed, the water environment sampling device is taken out from the river water by using the pull rope again, the second solenoid valve is opened, and the water sample is discharged from the outlet pipe. The water samples are collected and numbered for subsequent testing.

[0014] The water environment sampling device and the use method of the present application have the following advantages: 1. By starting the servo motor, the screw connected to its output shaft is driven to rotate, so as to control the outer movable plate to drive multiple sampling tubes to rise and fall. On this basis, by turning the operating hand wheel, the transmission belt and pulley are used to make the two bidirectional screws rotate synchronously, and then drive the outer movable seat to drive the sampling tube to move in the opposite or opposite directions, so as to adjust the distance between the three sampling tubes on the same side, so as to control the required water layer distance and collect water samples at the same time; 2. In addition, the three sampling tubes on the left are divided into one group, and the three sampling tubes on the right are divided into another group, which is helpful for sampling water layers in multiple water layers at different time periods and improves practicality. It solves the technical problem that although the water environment sampling device in the prior art can sample water layers of different depths, the spacing between the sampling tubes in the vertical direction is fixed and difficult to adjust according to needs, resulting in uncontrollable layer spacing when sampling water layers of different depths at the same time, reducing practicality.

[0015] 3. The present invention provides a water environment sampling device and a method for using the same. By pressing the stopper downward, the return spring is compressed, so that the stopper is freed from the restriction on the position of the U-shaped seat, thereby facilitating the extraction of the plug-in block from the inside of the U-shaped seat, thereby achieving the effect of facilitating the removal and replacement of the sampling tube; 4. By pulling the operating block, the cleaning brush connected by the movable rod is driven to move forward and backward, so that the inner wall of the sampling tube can be cleaned without affecting the test result after the next water sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of a water environment sampling device and a method of using the same provided by the present invention; Figure 2 It is a schematic diagram of the overall main structure of the present invention; Figure 3 It is a schematic diagram of the top view of the structure of the connection between two bidirectional screws of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the connection between the sampling tube and the movable seat of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the plug-in block and the movable seat of the present invention; Figure 6 It is a schematic diagram of the front view structure of the connection between the stopper and the movable seat of the present invention; Figure 7 It is a cross-sectional view of the sampling tube of the present invention.

[0017] Numbers in the figure: 1. pull rope; 2. cavity box; 3. floating plate; 4. guide column; 5. operating hand wheel; 6. sampling tube; 7. bidirectional screw; 8. fixed plate; 9. movable plate; 10. screw; 11. connecting block; 12. counterweight cone; 13. battery; 14. wireless transceiver module; 15. cleaning brush; 16. servo motor; 17. motor box; 18. movable seat; 19. pulley; 20. accommodating cavity; 21. channel; 22. mounting groove; 23. transmission belt; 24. water inlet pipe; 25. plug-in block; 26. U-shaped seat; 27. movable rod; 28. water outlet pipe; 29. ​​first solenoid valve; 30. tension spring; 31. operating block; 32. second solenoid valve; 33. stopper; 34. reset spring; 35. groove. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings, in which typical embodiments of the present invention are shown. Embodiment 1

[0019] like Figure 1-7As shown, a water environment sampling device of the present invention has a cavity box body 2 fixedly installed on the upper surface of the floating plate 3, and a wireless transceiver module 14 is fixedly installed on the inner side of the cavity box body 2; the adjustment mechanism includes a servo motor 16 and two guide columns 4 installed and fixed on the bottom of the floating plate 3, the output shaft of the servo motor 16 is fixedly connected with a screw 10, and a movable plate 9 is commonly provided on the outer sides of the screw 10 and the two guide columns 4, and mounting grooves 22 are provided on both sides of the movable plate 9, and two channels 21 are provided between the two mounting grooves 22, and a fixed plate 8 is fixedly installed on the inner side of the mounting groove 22, and a bidirectional lead screw 7 is rotatably connected to the inside of the fixed plate 8, and the upper end of any one of the bidirectional lead screws 7 passes through the bidirectional lead screw 7 and is fixed An operating handwheel 5 is connected, and a pulley 19 is sleeved on the outer side of the two-way screw 7. A transmission belt 23 that penetrates the fixed plate 8 is commonly arranged on the outer sides of the two pulleys 19. A movable seat 18 is symmetrically screwed on the outer side of the two-way screw 7; a water sample collection mechanism includes a plurality of sampling tubes 6 arranged on one side of the movable seat 18 and the fixed plate 8 for collecting water samples; a quick disassembly and assembly mechanism is arranged between the adjustment mechanism and the water sample collection mechanism, and is used to improve the efficiency of replacing the sampling tube 6; a cleaning mechanism is used to clean the sampling tube 6 of the water sample collection mechanism to avoid affecting the detection result of the water sample collected next time; a counterweight mechanism is arranged at the bottom of the adjustment mechanism, which helps the water environment adoption device to be quickly immersed in the river water and improve the sampling efficiency.

[0020] In the implementation, by starting the servo motor 16, the screw 10 connected to its output shaft is driven to rotate, so as to control the outer movable plate 9 to drive the multiple sampling tubes 6 to rise and fall. On this basis, by rotating the operating hand wheel 5, the transmission belt 23 and the pulley 19 are used to make the two bidirectional screws 7 rotate synchronously, and then drive the outer movable seat 18 to drive the sampling tube 6 to move in the relative or opposite direction, so as to achieve the effect of adjusting the spacing between the three sampling tubes 6 on the same side, so as to control the required water layer spacing while sampling water. In addition, the three sampling tubes 6 on the left are divided into one group, and the three sampling tubes 6 on the right are divided into another group, which is helpful for the water sampling work of multiple water layers at different time periods, improves practicality, and solves the problem that although the water environment sampling device in the prior art can sample water layers of different depths of the water body, the spacing of the sampling tubes 6 in the vertical direction is fixed and difficult to adjust according to demand, resulting in the uncontrollable layer spacing when sampling water layers of different depths at the same time, which reduces the technical problem of practicality.

[0021] like Figure 2-3 As shown, a battery 13 is fixedly installed on the inner side of the cavity box body 2, and a pull rope 1 is fixedly installed on the upper surface of the cavity box body 2, a motor box 17 is arranged on the outer side of the servo motor 16, the top of the motor box 17 is fixedly connected to the floating plate 3, an accommodating cavity 20 is opened inside the fixed plate 8, the pulley 19 is located inside the accommodating cavity 20, and the transmission belt 23 is located inside the channel 21.

[0022] like Figure 1 As shown, the counterweight mechanism includes a counterweight cone 12 rotatably connected to the screw 10, and a connecting block 11 is symmetrically fixedly installed on the outer side of the counterweight cone 12. The lower end of the guide column 4 is fixedly connected to the connecting block 11, which helps the water environment sampling device to be quickly immersed in the river water and improve the sampling efficiency.

[0023] like Figure 4 As shown, the water sample collection mechanism also includes an inlet pipe 24 and an outlet pipe 28 connected to the sampling tube 6. A first solenoid valve 29 is provided on the inlet pipe 24, and a second solenoid valve 32 is provided on the outlet pipe 28 for taking water samples and draining water samples. Embodiment 2

[0024] like Figure 1-7 As shown, on the basis of embodiment 1, the present invention provides a technical solution: the quick disassembly and assembly mechanism includes a U-shaped seat 26 installed and fixed on the front and rear surfaces of the movable seat 18 and the fixed plate 8, and a plug-in block 25 connected to the sampling tube 6 is inserted inside the U-shaped seat 26, and a groove 35 is opened on the upper surface of the plug-in block 25, and a reset spring 34 is fixedly installed at the bottom of the inner cavity of the groove 35, and a stopper 33 is fixedly connected to the upper end of the reset spring 34, and a cleaning mechanism includes a cleaning brush 15 arranged inside the sampling tube 6, and the bristles of the cleaning brush 15 are in contact with the sampling tube 6, and a movable rod 27 that penetrates the sampling tube 6 is fixedly installed on the inner side of the cleaning brush 15, and the cleaning mechanism also includes an operating block 31 connected to the movable rod 27, and a tension spring 30 is fixedly connected between the operating block 31 and the sampling tube 6, and the tension spring 30 is located on the outer side of the movable rod 27.

[0025] During implementation, by pressing the stop block 33 downward, the return spring 34 is compressed, so that the stop block 33 is freed from the restriction on the position of the U-shaped seat 26, thereby facilitating the extraction of the plug-in block 25 from the inside of the U-shaped seat 26, thereby achieving the effect of facilitating the removal and replacement of the sampling tube 6, and by pulling the operating block 31, the cleaning brush 15 connected by the movable rod 27 is driven to move forward and backward, so that the inner wall of the sampling tube 6 can be cleaned, which will not affect the detection result after the next water sample is taken.

[0026] A method for using a water environment sampling device comprises the following steps: S1. Adjust the spacing of the three sampling tubes 6 on the same side as needed. By rotating the operating hand wheel 5, the bidirectional lead screw 7 connected thereto is driven to rotate. At the same time, the pulley 19 and the transmission belt 23 are used to make the two bidirectional lead screws 7 rotate synchronously, thereby driving the two outer movable seats 18 to drive the sampling tubes 6 to move in opposite or opposite directions, so that the spacing of the three sampling tubes 6 changes, which is used to collect river water at different depths at the same time; S2, the operator stands on the bridge and holds the pull rope 1, and immerses the water environment sampling device into the river water under the action of the counterweight mechanism, and the floating plate 3 floats on the river surface; S3, using a preset remote controller to control the servo motor 16 to start, drive the screw 10 connected to its output shaft to rotate, drive the outer movable plate 9 to drive multiple sampling tubes 6 connected through the bidirectional screw 7, the fixed plate 8 and the movable seat 18 to dive to the required depth at the same time; S4, the three sampling tubes 6 on the left are arranged into a group, and the first solenoid valve 29 thereon is opened to collect water samples at different water levels in the first time period; S5, setting the three sampling tubes 6 on the right side into another group, and also opening the first solenoid valve 29 thereon, for collecting water samples at different water levels in the second time period; S6. After the water sampling is completed, the water environment sampling device is taken out from the river water by using the pull rope 1 again, and the second solenoid valve 32 is opened, and the water sample is discharged from the outlet pipe 28. The water samples are collected and numbered for subsequent detection.

[0027] When the present technical solution is used, the spacing between the three sampling tubes 6 on the same side is first adjusted as needed, and the bidirectional lead screw 7 connected thereto is driven to rotate by rotating the operating hand wheel 5, and at the same time, the pulley 19 and the transmission belt 23 are used to make the two bidirectional lead screws 7 rotate synchronously, thereby driving the two outer movable seats 18 to drive the sampling tubes 6 to move in opposite or reverse directions, so that the spacing between the three sampling tubes 6 changes, which is used to collect river water at different depths at the same time; then the operator stands on the bridge and holds the pull rope 1, and the water environment sampling device is immersed in the river water under the action of the counterweight mechanism, and the floating plate 3 floats on the river surface; then the preset remote control is used to control the servo motor 16 to start, driving the floating plate 3 with the servo motor 16 to move in the opposite direction; The screw 10 connected to its output shaft rotates, driving the outer movable plate 9 to drive multiple sampling tubes 6 connected by the bidirectional screw 7, the fixed plate 8 and the movable seat 18 to dive to the required depth at the same time; then the three sampling tubes 6 on the left are set as a group, and the first solenoid valve 29 thereon is opened for the collection of water samples at different water levels in the first time period; then the three sampling tubes 6 on the right are set as another group, and the first solenoid valve 29 thereon is also opened for the collection of water samples at different water levels in the second time period; finally, after the water sampling is completed, the pull rope 1 is used again to remove the water environment sampling device from the river water, the second solenoid valve 32 is opened, and the water sample is discharged from the outlet pipe 28. After the water sample is collected, it is numbered for subsequent detection. When the sampling tube 6 needs to be disassembled, first press the block 33 downward to compress the reset spring 34, so that the block 33 is separated from the restriction on the position of the U-shaped seat 26, and then move the sampling tube 6 to separate the plug-in block 25 connected thereto from the inside of the U-shaped seat 26. When the inner wall of the sampling tube 6 needs to be cleaned, the operating block 31 is pulled to drive the movable rod 27 connected thereto to drive the cleaning brush 15 to move forward and backward to scrub the inner wall of the sampling tube 6 .

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water environment sampling device, characterized in that: A vertical transmission mechanism is connected to the lower surface of the floating plate (3), and the movable part of the vertical transmission mechanism is connected to the movable plate (9); installation grooves (22) are provided on both sides of the movable plate (9), and two channels (21) are provided between the two installation grooves (22); a vertical fixed plate (8) is fixedly installed on each installation groove (22), and the upper and lower ends of the fixed plate (8) are rotatably connected to a bidirectional lead screw (7), and a pulley (19) is sleeved on the upper end of the bidirectional lead screw (7), and a transmission belt (23) passes through the channels (21) in turn and is connected to the pulleys (19) of the two bidirectional lead screws (7); an operating hand wheel (5) is fixedly connected to the upper end of one of the bidirectional lead screws (7); a plurality of movable seats (18) are threadedly connected to each bidirectional lead screw (7), and a water sample collection mechanism is movably connected to each movable seat (18).

2. The water environment sampling device according to claim 1, characterized in that: The water sample collection mechanism comprises a sampling cylinder (6), wherein a water inlet pipe (24) and a water outlet pipe (28) are respectively provided at the top and the bottom of the sampling cylinder (6), a first solenoid valve (29) is provided on the water inlet pipe (24), and a second solenoid valve (32) is provided on the water outlet pipe (28).

3. The water environment sampling device according to claim 2, characterized in that: The side end surfaces of the sampling tube (6) are symmetrically provided with plug-in blocks (25), the upper surface of the plug-in block (25) is provided with a groove (35), a return spring (34) is fixedly installed at the bottom of the inner cavity of the groove (35), and the upper end of the return spring (34) is fixedly connected to a stopper (33) with an inclined surface on one side; U-shaped seats (26) are respectively provided on both sides of the movable seat (18), the U-shaped seats (26) are plugged with the plug-in block (25), and are limited by the stopper (33).

4. The water environment sampling device according to claim 2, characterized in that: A cleaning brush (15) is provided inside the sampling barrel (6), and the outer surface of the bristles of the cleaning brush (15) is completely in contact with the inner surface of the longitudinal section of the sampling barrel (6); a movable rod (27) penetrating the sampling barrel (6) is fixedly installed inside the cleaning brush (15); an operating block (31) is connected to the outer end surface of the movable rod (27), and a tension spring (30) is fixedly connected between the operating block (31) and the sampling barrel (6), and the tension spring (30) is located outside the movable rod (27), and one end of the tension spring (30) is supported on the end surface of the sampling barrel (6), and the other end is supported on the end surface of the movable rod (27).

5. The water environment sampling device according to claim 1, characterized in that: The vertical transmission mechanism comprises a screw rod (10), a guide column (4) and a servo motor (16); the servo motor (16) is arranged at the bottom center position of the floating plate (3) through a sealed motor box (17); the output shaft of the servo motor (16) is connected to the screw rod (10), the screw rod (10) is threadedly connected to the movable plate (9), and the guide columns (4) are slidably matched on both sides of the movable plate (9), and the top of the guide column (4) is connected to the bottom of the floating plate (3); the screw rod (10) and the bottom of the guide column (4) are jointly supported on the upper surface of the connecting block (11).

6. The water environment sampling device according to claim 5, characterized in that: A counterweight cone (12) is provided at the center of the lower surface of the connection block (11).

7. The water environment sampling device according to claim 1, characterized in that: A cavity box body (2) is fixedly mounted on the upper surface of the floating plate (3); a wireless transceiver module (14) and a storage battery (13) are fixedly mounted inside the cavity box body (2); the storage battery (13) provides power for the wireless transceiver module (14) and the vertical transmission mechanism; the wireless transceiver module (14) is connected to a power mechanism of the vertical transmission mechanism.

8. The water environment sampling device according to claim 7, characterized in that: A drawstring (1) is provided on the upper surface of the cavity box body (2).

9. The water environment sampling device according to claim 1, characterized in that: The method for using the water environment sampling device is characterized by comprising the following steps: S1. Adjust the spacing between the three sampling tubes (6) on the same side as required, by rotating the operating hand wheel (5) to drive the bidirectional lead screw (7) connected thereto to rotate, and at the same time cooperate with the pulley (19) and the transmission belt (23) to make the two bidirectional lead screws (7) rotate synchronously, thereby driving the two outer movable seats (18) to drive the sampling tubes (6) to move in opposite or opposite directions, so that the spacing between the three sampling tubes (6) changes, so as to collect river water at different depths at the same time; S2, the operator stands on the bridge and holds the pull rope (1), and immerses the water environment sampling device into the river water under the action of the counterweight mechanism, and the floating plate (3) floats on the river surface; S3, using a preset remote controller to control the servo motor (16) to start, drive the screw (10) connected to its output shaft to rotate, drive the outer movable plate (9) to drive multiple sampling tubes (6) connected through the bidirectional screw (7), the fixed plate (8) and the movable seat (18) to dive to the required depth at the same time; S4, arranging the three sampling cylinders (6) on the left side into a group, and opening the first solenoid valve (29) thereon to collect water samples at different water levels in a first time period; S5, setting the three sampling cylinders (6) on the right side as another group, and also opening the first solenoid valve (29) thereon, for collecting water samples at different water levels in the second time period; S6. After the water sampling is completed, the water environment sampling device is taken out of the river water by using the pull rope (1) again, and the second solenoid valve (32) is opened, and the water sample is discharged from the water outlet pipe (28). The water samples are collected and numbered for subsequent testing.

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