Water quality sampling device and use method thereof

Abstract

The invention discloses a water quality sampling device and a use method thereof, and relates to the technical field of water quality sampling, the water quality sampling device comprises a fixed plate, a support seat is fixed on the top of the fixed plate, and the top of the support seat is rotatably connected with a turntable driven by a rotation driving mechanism to rotate; the rotary driving mechanism drives the rotary table to drive the stand column to rotate, the stand column rotates to drive the transverse plate and the sampling barrel below the transverse plate to move to a proper direction, and meanwhile, the winding mechanism drives the driving box to slide at the bottom end of the transverse plate, so that the sampling barrel is adaptively adjusted to a proper position according to actual sampling requirements; in addition, the sampling barrel is of a closed structure, the barrel cover can be driven by the lifting driving mechanism to descend and break away from the sampling barrel so that the water sample can enter the sampling barrel, and the barrel cover can be driven by the lifting driving mechanism to ascend so as to close the sampling barrel. Therefore, the water body sample can be prevented from being scattered in the process of recovering the sampling barrel after the water body sample is sampled.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality sampling, and in particular to a water quality sampling device and a use method thereof. Background Art

[0002] Water sampling is an environmental monitoring activity that involves collecting water samples from natural water bodies or water supply systems for water quality analysis and assessment. It specifically refers to the process of collecting water samples from water bodies for analysis. It is an important part of water quality monitoring and environmental assessment. This process is crucial for understanding the health of water bodies, monitoring pollutant levels, and formulating environmental protection policies. Water sampling devices are equipment used to collect water samples for subsequent water quality analysis and monitoring.

[0003] For example, the utility model patent with application number 202210620407.9 discloses a water quality sampling device for environmental monitoring, including a sampling vehicle, a sampling box is provided on the upper surface of the sampling vehicle, a sampling mechanism capable of fast quantitative sampling is provided inside the sampling box, a control panel is provided on the right side of the top of the sampling box, a fast telescopic and adjustable conveying mechanism is provided on the left side of the top of the sampling box, a telescopic arm is provided on the left side of the sampling box, and a winding motor is provided on the left side of the top of the sampling box and at the position corresponding to the telescopic arm.

[0004] Most of the existing water quality sampling devices have a single structure and cannot flexibly adjust the position of the sampling barrel, which is not convenient for water sampling at different positions. After sampling, the collected water samples cannot be automatically loaded into the corresponding sample storage container, but need to be filled manually, with a low degree of automation and inconvenient use. In addition, the sampling barrel of the existing water quality sampling device is generally an open design, which is not stable enough, resulting in the water sample being easily spilled during the process of recovering the sampling barrel after sampling, thereby causing unnecessary water sample loss and reducing the water sample sampling efficiency. Therefore, the present invention proposes a water quality sampling device and a method of using the same to solve the problems existing in the prior art. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to propose a water quality sampling device and a method of use thereof, so as to solve the problems that the existing water quality sampling devices are not convenient for water sampling at different locations, the collected water samples cannot be automatically loaded into the corresponding sample storage container after sampling, and the water samples are easily spilled during the process of recovering the sampling bucket after sampling.

[0006] In order to achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a water quality sampling device, including a fixed plate, a support seat is fixed on the top of the fixed plate, a turntable driven to rotate by a rotary drive mechanism is rotatably connected to the top of the support seat, a column is fixed on the top of the turntable, a cross plate is fixedly sleeved on the upper part of the column, a driving box driven to move by a winding mechanism is slidably provided at the bottom end of the cross plate, a square frame driven to move by a translation driving mechanism is suspended at the bottom end of the driving box, a winding roller driven to rotate by a motor is provided in the frame, a steel wire rope is wound around the winding roller, the bottom end of the steel wire rope slides through the bottom of the square frame and is suspended with a sampling barrel, a barrel cover driven to rise and fall by a lifting drive mechanism is sealed and docked at the bottom end of the sampling barrel, a drain pipe is fixed at the bottom end of the barrel cover, an electronic control valve is fixed on the drain pipe, a limiting ring plate is equidistantly fixed on the side of the top of the support seat away from the turntable, and a sample storage tank is placed in the limiting ring plate.

[0007] Further improvement is that: the rotating drive mechanism includes a first motor fixed to the bottom end of the support base and a first sprocket fixed to the output end of the first motor, a shaft column is fixed to the bottom end of the turntable, the lower part of the shaft column passes through the support base through a bearing and is fixed with a second sprocket, and a chain is jointly sleeved on the first sprocket and the second sprocket.

[0008] A further improvement is that a first fixing ring is fixed to the upper part of the column close to the driving box, a second fixing ring is fixed to the top of the horizontal plate away from the column, and a sling is fixed between the first fixing ring and the second fixing ring.

[0009] Further improvements are: an I-shaped slide is slidably provided on the horizontal plate, the drive box is fixed to the bottom end of the I-shaped slide, the winding mechanism includes a winding machine fixed on both sides of the bottom end of the horizontal plate and a wire rope wound around the winding wheel at the output end of the winding machine, pull rings are fixed on the outer walls on both sides of the drive box, the end of the wire rope away from the winding machine is fixedly connected to the pull ring, and a circular hole suitable for the wire rope is opened on the column.

[0010] A further improvement is that the translation drive mechanism includes a second motor fixed to the outer wall of the drive box and a first screw rod rotatably connected to the inside of the drive box and driven to rotate by the second motor, a threaded block is threadedly sleeved on the first screw rod, and the bottom end of the threaded block slides through the bottom end of the drive box and is fixed to the top of the square frame.

[0011] A further improvement is that a rotating shaft is fixed to the outer walls on both sides of the winding roller, and the end of the rotating shaft away from the winding roller is rotatably connected to the front and rear inner walls of the frame through a bearing, and the rotating shaft close to the motor side passes through the bearing to the outside of the frame and is fixedly connected to the output end of the motor.

[0012] A further improvement is that the lifting drive mechanism includes a third motor fixed to the top of the sampling barrel and a support plate fixed inside the sampling barrel, the output end of the third motor passes through the inside of the sampling barrel through a sealed bearing and is fixed with a second screw rod, a threaded plate is threadedly sleeved on the second screw rod, a sliding rod is symmetrically fixed to the bottom end of the threaded plate, and the bottom end of the sliding rod slides through the support plate and is fixedly connected to the barrel cover.

[0013] A further improvement is that a rubber sealing ring is fixed on the top of the barrel cover, a sealing groove adapted to the rubber sealing ring is opened at the bottom of the sampling barrel, and an annular counterweight is fixed on the outer wall of the sampling barrel.

[0014] A method for using a water quality sampling device comprises the following steps:

[0015] Step 1: First, use the rotary drive mechanism to drive the turntable to drive the column to rotate, and during the rotation of the column, drive the horizontal plate to rotate, and then use the winding mechanism to drive the driving box to slide and move at the bottom end of the horizontal plate until the sampling bucket is driven to move to the corresponding position above the water surface according to the actual sampling position required, and the sampling position adjustment is completed;

[0016] Step 2: Then start the motor to drive the winding roller to unwind the wire rope and lower the sampling bucket until the sampling bucket is submerged below the water surface, then start the lifting drive mechanism to drive the bucket cover to descend and detach from the sampling bucket. At this time, the water sample enters the sampling bucket from the bottom of the sampling bucket, and then start the lifting drive mechanism to drive the bucket cover to rise and seal it to the bottom of the sampling bucket. Then start the motor to drive the winding roller to rewind the wire rope, so that the sampling bucket rises and resets, completing the sampling work;

[0017] Step 3: Finally, use the reeling mechanism to drive the drive box to slide at the bottom of the horizontal plate toward the column until the sampling bucket is moved to the top of the sample storage tank at the top of the support seat, and then start the motor to drive the reel roller to unwind the wire rope and lower the sampling bucket to the sample storage tank position, and then open the electronic control valve on the drain pipe at the bottom of the bucket cover to drain the water sample in the sampling bucket into the sample storage tank, completing the automatic sample filling work.

[0018] The beneficial effects of the present invention are as follows: the present invention drives the turntable to rotate the column through the rotary drive mechanism, so as to drive the horizontal plate and the sampling bucket thereunder to move to an appropriate direction by utilizing the rotation of the column, and at the same time drives the driving box to slide and displace at the bottom end of the horizontal plate through the winding mechanism, so as to facilitate the adaptive adjustment of the sampling bucket to an appropriate position according to the actual sampling needs, and the structure is flexible, so as to facilitate the water sampling work at different positions, and the collected water samples can be automatically filled into the sample storage tank, so as to have a high degree of automation and be easy to use;

[0019] In addition, the sampling barrel of the present invention is a closed structure, and the barrel cover can be driven down and detached from the sampling barrel by a lifting drive mechanism to allow water samples to enter therein, and the barrel cover can be driven up and closed by a lifting drive mechanism, thereby preventing water samples from spilling during the process of recovering the sampling barrel after water sample sampling, thereby avoiding unnecessary loss of water samples and improving the efficiency of water sample sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a front view of the first embodiment of the present invention;

[0022] Figure 2 is a front cross-sectional view of the first embodiment of the present invention;

[0023] Figure 3 is a side sectional view of a drive box according to a first embodiment of the present invention;

[0024] Figure 4 is a cross-sectional view of a sampling barrel according to Embodiment 1 of the present invention;

[0025] Figure 5 It is a side view of the support base of the first embodiment of the present invention.

[0026] Among them: 1. fixed plate; 2. support seat; 3. turntable; 4. column; 5. cross plate; 6. drive box; 7. frame; 8. motor; 9. winding roller; 10. wire rope; 11. sampling bucket; 12. bucket cover; 13. drain pipe; 14. limit ring plate; 15. sample storage tank; 16. second motor; 17. first sprocket; 18. shaft column; 19. second sprocket; 20. chain; 21. first fixed ring; 22. second fixed ring; 23. sling; 24. I-shaped slide; 25. reel; 26. wire rope; 27. pull ring; 28. second motor; 29. ​​first screw rod; 30. threaded block; 31. rotating shaft; 32. third motor; 33. support plate; 34. second screw rod; 35. threaded plate; 36. slide rod; 37. rubber sealing ring; 38. annular counterweight block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5The present embodiment provides a water quality sampling device, comprising a fixing plate 1 fixed to the bank of the water area to be sampled by bolts and a support seat 2 fixed to the top of the fixing plate 1 by bolts, the support seat 2 is hollow in design, a turntable 3 is rotatably connected to the top of the support seat 2, and the turntable 3 is driven to rotate by a rotating drive mechanism inside the support seat 2, a column 4 is fixed to the top of the turntable 3 by bolts, the column 4 rotates synchronously with the turntable 3, a horizontal plate 5 is sleeved on the upper part of the column 4, and the column 4 and the horizontal plate 5 are fixed by bolts, a hollow driving box 6 is slidably provided at the bottom end of the horizontal plate 5, and the driving box 6 is driven by a winding mechanism and displaced laterally at the bottom end of the horizontal plate 5, driving A frame 7 is suspended at the bottom of the box 6, and the frame 7 is driven by the translation drive mechanism inside the driving box 6 and moves horizontally back and forth under the driving box 6. A motor 8 is fixed to the outer wall of the rear side of the frame 7 by bolts. A winding roller 9 is provided in the frame 7 and the winding roller 9 is driven to rotate by the motor 8. A steel wire rope 10 is wound around the winding roller 9, and the steel wire rope 10 is wound or unwound by the winding roller 9. The bottom end of the steel wire rope 10 slides through the bottom of the frame 7 and is suspended with a sampling bucket 11 for collecting water samples. A through hole adapted to the steel wire rope 10 is opened at the bottom of the frame 7, and a barrel cover 12 is sealed and docked at the bottom end of the sampling barrel 11, and the barrel cover 12 is through-hole-matched with the steel wire rope 10. The bottom of the sampling barrel 11 is closed or opened by the barrel cover 12 driven by the lifting drive mechanism and lifted and displaced. A drain pipe 13 for discharging the water sample in the sampling barrel 11 is welded and fixed at the bottom of the barrel cover 12, and an electronic control valve is fixed on the drain pipe 13 for opening or closing the drain pipe 13. The sampling barrel 11 is a closed structure. The barrel cover 12 can be driven down and separated from the sampling barrel 11 by the lifting drive mechanism to allow the water sample to enter therein, and the barrel cover 12 can be driven up and closed by the lifting drive mechanism to avoid water from leaking when the water quality sample is collected and the sampling barrel 11 is recovered. The sample is spilled, and a limiting ring plate 14 is fixed to the right side of the top of the support seat 2 with equal distances. A sample storage tank 15 for storing water samples is placed in the limiting ring plate 14. The turntable 3 is driven by the rotating drive mechanism to drive the column 4 to rotate, so that the rotation of the column 4 drives the cross plate 5 and the sampling barrel 11 thereunder to move to the appropriate direction. At the same time, the drive box 6 is driven by the winding mechanism to slide and displace at the bottom end of the cross plate 5, so that the sampling barrel 11 can be adaptively adjusted to the appropriate position according to the actual sampling needs. The structure is flexible, which is convenient for water sampling at different positions, and the collected water samples can be automatically filled into the sample storage tank 15.

[0030] The rotary drive mechanism includes a first motor 16 and a first sprocket 17, wherein the first motor 16 is fixed to the bottom end of the support seat 2 by bolts, the first sprocket 17 is fixedly sleeved on the output shaft of the first motor 16, a shaft column 18 is welded and fixed to the bottom end of the turntable 3, the lower part of the shaft column 18 passes through the support seat 2 through a bearing, a second sprocket 19 is fixedly sleeved on one side of the shaft column 18 located in the support seat 2, a chain 20 is sleeved on the first sprocket 17 and the second sprocket 19 are connected through the chain 20, the first motor 16 is started to drive the first sprocket 17 to rotate, the first sprocket 17 drives the second sprocket 19 to rotate through the chain 20, and the second sprocket 19 drives the turntable 3 to rotate through the shaft column 18.

[0031] A first fixing ring 21 is welded and fixed to the upper right side of the column 4, and a second fixing ring 22 is welded and fixed to the right side of the top end of the cross plate 5. A sling 23 is fixed between the first fixing ring 21 and the second fixing ring 22. The sling 23 is used to assist in lifting the cross plate 5 to improve its stability.

[0032] An I-shaped slide 24 with an I-shaped design is slidably provided on the horizontal plate 5. A through groove adapted to the I-shaped slide 24 is provided on the horizontal plate 5, so that the I-shaped slide 24 can slide and move along the horizontal plate 5. The drive box 6 is fixed to the bottom end of the I-shaped slide 24 by bolts. The winding mechanism includes a winding machine 25 and a wire rope 26. The winding machine 25 has two groups and is respectively fixed to the left and right sides of the bottom end of the horizontal plate 5 by bolts. The wire rope 26 is wound around the winding wheel at the output end of the winding machine 25. The outer walls of the left and right sides of the drive box 6 are welded and fixed with The pull ring 27, one end of the wire rope 26 away from the reel 25 is fixedly connected to the pull ring 27, and a round hole adapted to the wire rope 26 is opened on the column 4 for the wire rope 26 to slide through. One group of reels 25 reels the wire rope 26 on the reel wheel at its output end, and another group of reels 25 unwinds the wire rope 26 on the reel wheel at the output end, thereby pulling the drive box 6 by pulling and releasing, so that the drive box 6 can drive the I-shaped slide 24 to slide and move along the cross plate 5.

[0033] The translation drive mechanism comprises a second motor 28 and a first screw rod 29, wherein the second motor 28 is fixed to the outer wall of the rear side of the drive box 6 by bolts, and the first screw rod 29 is rotatably connected to the inside of the drive box 6 by a bearing, and the rear end of the first screw rod 29 passes through the outside of the drive box 6 through a bearing and is fixedly connected to the output end of the second motor 28, and a thread block 30 is threadedly sleeved on the first screw rod 29, and the bottom end of the thread block 30 slides through the bottom end of the drive box 6 and is fixed to the top end of the square frame 7 by bolts, and a through groove adapted to the thread block 30 is opened at the bottom end of the drive box 6. Starting the second motor 28 drives the first screw rod 29 to rotate, so that the thread block 30 threadedly sleeved on the first screw rod 29 moves along the first screw rod 29, and drives the square frame 7 at its bottom to move longitudinally forward and backward.

[0034] The outer walls on both sides of the winding roller 9 are fixed with a rotating shaft 31 by bolts, and the end of the rotating shaft 31 away from the winding roller 9 is rotatably connected to the inner walls of the front and rear sides of the square frame 7 through a bearing, wherein the rear end of the rotating shaft 31 located on the rear side passes through the outside of the square frame 7 through a bearing and is fixedly connected to the output end of the motor 8. The motor 8 is started to drive the rotating shaft 31 to drive the winding roller 9 to rotate, thereby realizing the winding or unwinding of the wire rope 10.

[0035] The lifting drive mechanism comprises a third motor 32 and a support plate 33, wherein the third motor 32 is fixed in a motor box at the top of the sampling barrel 11 by bolts, and the left and right ends of the support plate 33 are respectively welded and fixed to the inner walls of the left and right sides of the sampling barrel 11, and the output end of the third motor 32 passes through the interior of the sampling barrel 11 through a sealed bearing and is fixed with a second screw rod 34 by bolts, and the bottom end of the second screw rod 34 is rotatably connected to the top of the support plate 33 through a bearing, and a threaded plate 35 is threadedly sleeved on the second screw rod 34, and a slide rod 36 is symmetrically fixed at the bottom end of the threaded plate 35, and the bottom end of the slide rod 36 slides through the support plate 33 and is fixedly connected to the barrel cover 12. When the third motor 32 is started to drive the second screw rod 34 to rotate, the threaded plate 35 threadedly sleeved on the second screw rod 34 drives the slide rod 36 to move up and down, and the slide rod 36 drives the barrel cover 12 to move up and down.

[0036] A rubber sealing ring 37 is fixed to the top of the barrel cover 12, and a sealing groove adapted to the rubber sealing ring 37 is opened at the bottom of the sampling barrel 11. The sealing connection between the barrel cover 12 and the sampling barrel 11 is achieved through the cooperation of the rubber sealing ring 37 and the sealing groove. An annular counterweight block 38 is fixed to the outer wall of the sampling barrel 11 to increase the weight so that the sampling barrel 11 can sink into the water.

[0037] Embodiment 2

[0038] This embodiment also provides a method for using a water quality sampling device, comprising the following steps:

[0039] Step 1: First, the rotary drive mechanism is used to drive the turntable 3 to rotate. When the turntable 3 rotates, the column 4 is driven to rotate synchronously. During the rotation of the column 4, the horizontal plate 5 is driven to rotate. When the horizontal plate 5 rotates, the driving box 6, the frame 7 and the sampling barrel 11 at the bottom thereof are driven to rotate synchronously with the column 4. Then, the winding mechanism is used to drive the driving box 6 to slide and move at the bottom of the horizontal plate 5. When the driving box 6 moves, the frame 7 and the sampling barrel 11 at the bottom thereof are driven to move differently, until the sampling barrel 11 is moved to the corresponding position above the water surface according to the sampling position actually required, and the sampling position adjustment is completed;

[0040] Step 2: Then start the motor 8 to drive the winding roller 9 to unwind the wire rope 10. During the unwinding process, the sampling bucket 11 connected to the bottom end of the wire rope 19 will drop accordingly until it is immersed to the actual required sampling depth under the water surface. Then start the lifting drive mechanism to drive the bucket cover 12 to drop and detach from the sampling bucket 11 to release the seal on the bottom end of the sampling bucket 11. At this time, the water sample enters the sampling bucket 11 from the bottom end of the sampling bucket 11. When the water sample fills the sampling bucket 11, start the lifting drive mechanism to drive the bucket cover 12 to rise and seal and dock with the bottom end of the sampling bucket 11 to close the bottom end of the sampling bucket 11. Then start the motor 8 to drive the winding roller 9 to rotate in the opposite direction and rewind the wire rope 10, so that the sampling bucket 11 filled with water samples rises and resets accordingly, completing the sampling work;

[0041] Step three: Finally, the winding mechanism is used to drive the driving box 6 to slide at the bottom of the horizontal plate 5 toward the column 4 until the sampling barrel 11 is driven to move to the top of the sample storage tank 15 at the top of the support seat 2, and then the motor 8 is started to drive the winding roller 9 to rotate to unwind the wire rope 10, so that the sampling barrel 11 is lowered to the position of the sample storage tank 15. At this time, the drain pipe 13 extends into the storage tank 15, and then the electronic control valve on the drain pipe 13 at the bottom end of the barrel cover 12 is opened to allow the water sample in the sampling barrel 11 to be discharged into the sample storage tank 15 through the drain pipe 13, completing the automatic sample filling work, and repeating the above steps until all sample storage tanks 15 are filled.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water quality sampling device, comprising a fixing plate (1), characterized in that: A support seat (2) is fixed on the top of the fixed plate (1), and a turntable (3) driven to rotate by a rotary drive mechanism is rotatably connected to the top of the support seat (2). A column (4) is fixed on the top of the turntable (3), and a horizontal plate (5) is fixedly sleeved on the upper part of the column (4). A driving box (6) driven to move by a winding mechanism is slidably provided at the bottom end of the horizontal plate (5), and a square frame (7) driven to move by a translational driving mechanism is suspended at the bottom end of the driving box (6), and a winding roller (9) driven to rotate by a motor (8) is provided in the square frame (7). A steel wire rope (10) is wound around the roller (9), the bottom end of the steel wire rope (10) slides through the bottom of the frame (7) and is suspended with a sampling barrel (11), the bottom end of the interior of the sampling barrel (11) is sealed and docked with a barrel cover (12) driven to rise and fall by a lifting drive mechanism, a drainage pipe (13) is fixed to the bottom end of the barrel cover (12), an electronic control valve is fixed to the drainage pipe (13), a limiting ring plate (14) is equidistantly fixed to the side of the top of the support seat (2) away from the turntable (3), and a sample storage tank (15) is placed in the limiting ring plate (14).

2. A water quality sampling device according to claim 1, characterized in that: The rotary drive mechanism comprises a first motor (16) fixed to the bottom end of the support seat (2) and a first sprocket (17) fixed to the output end of the first motor (16); a shaft column (18) is fixed to the bottom end of the turntable (3); the lower part of the shaft column (18) passes through the inside of the support seat (2) through a bearing and is fixed with a second sprocket (19); a chain (20) is sleeved on the first sprocket (17) and the second sprocket (19).

3. A water quality sampling device according to claim 1, characterized in that: A first fixing ring (21) is fixed to the upper part of the column (4) on the side close to the drive box (6), a second fixing ring (22) is fixed to the top of the horizontal plate (5) on the side away from the column (4), and a sling (23) is fixed between the first fixing ring (21) and the second fixing ring (22).

4. A water quality sampling device according to claim 1, characterized in that: An I-shaped slide (24) is slidably provided on the transverse plate (5), the drive box (6) is fixed to the bottom end of the I-shaped slide (24), the winding mechanism comprises a winding machine (25) fixed to both sides of the bottom end of the transverse plate (5) and a steel wire rope (26) wound around a winding wheel at the output end of the winding machine (25), pull rings (27) are fixed to the outer walls on both sides of the drive box (6), one end of the steel wire rope (26) away from the winding machine (25) is fixedly connected to the pull ring (27), and a circular hole adapted to the steel wire rope (26) is opened on the column (4).

5. A water quality sampling device according to claim 1, characterized in that: The translation driving mechanism comprises a second motor (28) fixed to the outer wall of the driving box (6) and a first screw rod (29) rotatably connected to the inside of the driving box (6) and driven to rotate by the second motor (28); a threaded block (30) is threadedly sleeved on the first screw rod (29); the bottom end of the threaded block (30) slides through the bottom end of the driving box (6) and is fixed to the top end of the square frame (7).

6. A water quality sampling device according to claim 1, characterized in that: A rotating shaft (31) is fixed to the outer walls on both sides of the winding roller (9); one end of the rotating shaft (31) away from the winding roller (9) is rotatably connected to the inner walls on the front and rear sides of the frame (7) through a bearing; the rotating shaft (31) on the side close to the motor (8) passes through the bearing to the outside of the frame (7) and is fixedly connected to the output end of the motor (8).

7. A water quality sampling device according to claim 1, characterized in that: The lifting drive mechanism comprises a third motor (32) fixed to the top of the sampling barrel (11) and a support plate (33) fixed inside the sampling barrel (11); the output end of the third motor (32) penetrates into the sampling barrel (11) through a sealed bearing and is fixed with a second screw rod (34); a threaded plate (35) is threadedly sleeved on the second screw rod (34); a sliding rod (36) is symmetrically fixed at the bottom end of the threaded plate (35); the bottom end of the sliding rod (36) slides through the support plate (33) and is fixedly connected to the barrel cover (12).

8. A water quality sampling device according to claim 1, characterized in that: A rubber sealing ring (37) is fixed on the top of the barrel cover (12), a sealing groove adapted to the rubber sealing ring (37) is provided on the bottom of the sampling barrel (11), and an annular counterweight (38) is fixed on the outer wall of the sampling barrel (11).

9. A method for using a water quality sampling device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: First, the rotary drive mechanism is used to drive the turntable (3) to drive the column (4) to rotate, and the column (4) drives the horizontal plate (5) to rotate during the rotation process, and then the winding mechanism is used to drive the driving box (6) to slide and move at the bottom end of the horizontal plate (5) until the sampling bucket (11) is driven to move to the corresponding position above the water surface according to the sampling position actually required, thereby completing the sampling position adjustment; Step 2: Then start the motor (8) to drive the winding roller (9) to unwind the wire rope (10) and lower the sampling bucket (11) until the sampling bucket (11) is submerged below the water surface, then start the lifting drive mechanism to drive the bucket cover (12) to descend and detach from the sampling bucket (11), at which time the water sample enters the sampling bucket (11) from the bottom of the sampling bucket (11), then start the lifting drive mechanism to drive the bucket cover (12) to rise and seal with the bottom of the sampling bucket (11), then start the motor (8) to drive the winding roller (9) to rewind the wire rope (10), so that the sampling bucket (11) rises and resets, completing the sampling work; Step 3: Finally, the reeling mechanism is used to drive the driving box (6) to slide at the bottom of the horizontal plate (5) toward the column (4) until the sampling barrel (11) is moved to the top of the sample storage tank (15) at the top of the support seat (2), and then the motor (8) is started to drive the reeling roller (9) to unwind the wire rope (10) and lower the sampling barrel (11) to the position of the sample storage tank (15), and then the electronic control valve on the drain pipe (13) at the bottom of the barrel cover (12) is opened to discharge the water sample in the sampling barrel (11) into the sample storage tank (15), completing the automatic sample filling work.

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