Water quality sampling device for water ecology detection

Abstract

The utility model relates to the technical field of water quality sampling, and discloses a water quality sampling device for water ecology detection, which comprises a bottom plate, the upper end of which is provided with a support rod along the vertical direction; the push-and-pull assembly is arranged in the horizontal direction and connected with the upper end of the supporting rod, and the push-and-pull end of the push-and-pull assembly is connected with a containing box with an opening in the lower end; the lifting assembly is arranged in the placing box; the lower end of the sampling box is open, the upper end of the sampling box is connected with the lifting end of the lifting assembly, and a telescopic assembly is arranged in the sampling box; the fixing plate is arranged in the sampling box and located below the telescopic assembly, at least one through hole is formed in the fixing plate in a penetrating mode, and the through hole is detachably connected with the sampling pipe; the movable plate is arranged in the sampling box and located between the telescopic assembly and the fixed plate, the upper end of the movable plate is connected with the telescopic end of the telescopic assembly, and the movable plate is connected with the upper end of the connecting rod; and the movable plugs are connected with the lower end of the connecting rod and are arranged in one-to-one correspondence with the sampling tubes. According to the utility model, the sampling tube can be conveniently cleaned and maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality sampling technical field especially water quality sampling device for aquatic ecological detection. BACKGROUND

[0002] Water quality sampling is to collect water samples of polluted water bodies, and through analysis and determination, basic data of water body pollution are obtained. The water sample for analysis should be representative, reflecting the chemical composition and characteristics of the water body. The method, position, time and frequency of sampling are determined according to the characteristics of the water body and the analysis purpose.

[0003] The patent with publication number CN222336852U discloses a water quality sampling device for environmental detection. When in use, the staff moves the device to an appropriate position, then fixes the position of the bottom plate with the fixing pin, starts the third servo motor to drive the screw rod to rotate, thus driving the screw sleeve to move, and further driving the sampling cavity to move to an appropriate position. Then, the first servo motor is started to drive the winding roller to rotate, thus driving the sampling cavity to move with the connecting rope, so that the sampling cavity enters the water. Then, the sampling cavity is moved to an appropriate height, the second servo motor is started to drive the transmission gear to rotate. Since the transmission gear teeth and the transmission gear are intermeshed, the transmission gear teeth drive the threaded rotating sleeve to rotate under the limiting of the limiting rail and the limiting block. Since the threaded rotating sleeve and the threaded rod are threadedly connected, the threaded rod drives the movable plate to move under the limiting of the limiting rod and the limiting sleeve, thus driving the piston inside the sampling tube to move upward to suck and sample the water in the target area. After sampling is completed, the first servo motor drives the connecting rope to be wound with the winding roller, thus driving the sampling cavity to move upward. Then, the third servo motor is started to drive the sampling cavity to move to the shore, and the second servo motor is started to reverse, thus discharging the water inside the sampling tube. However, the device has the following defects when in use. Since its working environment is water, after sampling is completed, various impurities in the water sample may adhere to the inner wall of the sampling tube. With the passage of time, these residual substances will gradually accumulate. If not cleaned in time, the impurities remaining in the tube may mix into the newly collected water sample in the next sampling, changing the composition and properties of the water sample, thus interfering with the accuracy of the detection result, making the detection data unable to truly reflect the actual situation of the water body in the target area. Moreover, multiple sampling tubes are arranged in the mounting plate of the device at equal intervals and closely arranged. This layout makes it difficult for conventional cleaning tools to smoothly and effectively clean each sampling tube. Due to space limitations, the spray head of the flushing device is also difficult to adjust to an appropriate angle to perform omnidirectional high-pressure flushing on each sampling tube, making it difficult to clean the dirt in some dead angles and gaps in the tube, further increasing the difficulty of cleaning and maintenance.

[0004] In view of this, how to clean and maintain the sampling tube conveniently becomes a technical problem to be solved by those skilled in the art. Utility model content

[0005] The water quality sampling device for water ecological detection aims to overcome the above-mentioned shortcomings.

[0006] In order to achieve the above-mentioned purposes, the technical scheme of the utility model is as follows: the water quality sampling device for water ecological detection comprises:

[0007] A bottom plate is provided with a support rod in the vertical direction at the upper end thereof;

[0008] A push-pull assembly is arranged in the horizontal direction, connected with the upper end of the support rod, and connected with the placement box at the push-pull end and the lower end opening thereof;

[0009] A lifting assembly is arranged in the placement box;

[0010] A sampling box is provided with an opening at the lower end thereof, connected with the lifting end of the lifting assembly at the upper end thereof, and arranged with an extension assembly inside;

[0011] A fixed plate is arranged in the sampling box and below the extension assembly, provided with at least one through hole, and the through hole is detachably connected with the sampling tube;

[0012] A movable plate is arranged in the sampling box and between the extension assembly and the fixed plate, connected with the extension end of the extension assembly at the upper end thereof, and connected with the upper end of the connecting rod; and

[0013] A movable plug is connected with the lower end of the connecting rod and arranged one-to-one with the sampling tube.

[0014] Further, the push-pull assembly comprises a fixed rod, a sliding groove, a first screw rod, a first motor, a sliding block and a limiting groove, the fixed rod is connected with the upper end of the support rod, the sliding groove is arranged in the horizontal direction in the fixed rod, the first screw rod is rotatably connected in the sliding groove, the first motor is connected with the side wall of the fixed rod, the output shaft of the first motor is rotatably connected with the first screw rod through the fixed rod, the sliding block is threadedly rotatable on the first screw rod, the lower end of the sliding block protrudes from the sliding groove, the lower end of the sliding block is connected with the upper end of the placement box, the limiting groove is arranged at the upper end of the sliding groove, and the sliding block is slidably connected with the limiting groove.

[0015] Further, the lifting assembly comprises a second motor, a winding roller and a connecting rope, the winding roller is connected to the placing box in a horizontal direction, the second motor is connected to the side wall of the placing box, the output shaft of the second motor is rotatably connected to the winding roller, one end of the connecting rope is connected to the side wall of the winding roller through the opening of the placing box, and the other end of the connecting rope is connected to the upper end of the sampling box.

[0016] Further, the telescopic assembly comprises a guide slot, a second screw rod, a guide rod and a third motor, the sampling box is provided with a guide slot on the opposite side walls in a vertical direction, one of the guide slots is rotatably connected to the second screw rod in a vertical direction, the other guide slot is fixedly connected to the guide rod in a vertical direction, the second screw rod is opposite to the guide rod, the third motor is connected to the upper end of the sampling box, the output shaft of the third motor is rotatably connected to the second screw rod through the sampling box, the opposite side walls of the movable plate are provided with limiting blocks, one of the limiting blocks is slidably connected to the guide rod, and the other limiting block is threadedly connected to the second screw rod.

[0017] Further, the upper end of the sampling box is provided with a hanging piece, and the other end of the connecting rope is detachably connected to the hanging piece.

[0018] Further, the upper end of the sampling box is provided with a plurality of water permeable holes.

[0019] Further, the side wall of the sampling box is provided with a box door with a locking function.

[0020] Further, the placing box and the sampling box are provided with a measuring assembly, and the measuring assembly is used to display the sinking distance of the sampling tube.

[0021] Further, the measuring assembly comprises a connecting plate, a mounting plate, a scale rod and an end plate, the side wall of the placing box is provided with the connecting plate, the side wall of the sampling box is provided with the mounting plate, the connecting plate and the mounting plate are opposite to each other, one end of the scale rod is fixedly connected to the mounting plate, the other end of the scale rod is slidably connected to the connecting plate, the upper end of the sampling tube is flush with the upper end of the fixing plate, and the upper end of the mounting plate is flush with the upper end of the fixing plate.

[0022] Further, the other end of the scale rod is provided with an end plate.

[0023] Compared with the prior art, the utility model has at least the following advantages: when using, the staff first carries the device to the sampling point, then pushes the placing box with the push-pull assembly and moves along the horizontal direction, and makes the placing box reach the sampling position; then, the lifting assembly drives the sampling box to ascend or descend, when the sampling box descends to the appropriate depth, the water body can flow into the sampling box through the lower end opening, at this time, the telescopic assembly is started, when it stretches, drives the movable plate to move up, the movable plate drives the movable plug to move up through the connecting rod, makes the movable plug leave the sampling tube opening, the water sample enters the tube through the sampling tube immediately, after the collection is finished, the telescopic assembly is retracted, drives the movable plate to move down, the movable plate drives the movable plug to move down through the connecting rod, makes the movable plug block the sampling tube opening, prevents the water sample from flowing out, after the sampling is finished, the lifting assembly is used to pull up the sampling box, and the placing box and the sampling box are retracted through the push-pull assembly, so that subsequent processing work is carried out. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without paying creative labor.

[0025] Figure 1 It is the overall structure schematic diagram of water quality sampling device for water ecological detection of the utility model;

[0026] Figure 2 It is the sectional view of water quality sampling device for water ecological detection of the utility model;

[0027] Figure 3 It is the overall structure schematic diagram of sampling box of the utility model;

[0028] Figure 4 It is the overall structure schematic diagram of another angle of sampling box of the utility model;

[0029] Figure 5 It is the sectional view of sampling box of the utility model;

[0030] Figure 6 It is the sectional view of another angle of sampling box of the utility model.

[0031] Reference numerals: 1. Base plate; 2. Support rod; 3. Placement box; 4. Sampling box; 5. Fixing plate; 6. Sampling tube; 7. Movable plate; 8. Connecting rod; 9. Movable plug; 10. Fixing rod; 11. Slide groove; 12. First screw; 13. First motor; 14. Sliding block; 15. Second motor; 16. Take-up roller; 17. Connecting rope; 18. Suspension component; 19. Guide groove; 20. Second screw; 21. Guide rod; 22. Third motor; 23. Limiting block; 24. Water permeable hole; 25. Box door; 26. Connecting plate; 27. Mounting plate; 28. Scale rod; 29. ​​End plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figure 1 , Figure 2 , Figure 6 This utility model provides a water quality sampling device for water ecological testing, including a base plate 1 with a support rod 2 vertically arranged at the upper end, the support rod 2 providing a solid vertical support structure for the entire device; a push-pull assembly arranged horizontally, which is connected to the upper end of the support rod 2, and its push-pull end is connected to a placement box 3 with an opening at the lower end; a lifting assembly is arranged inside the placement box 3; for the sampling box 4, its lower opening is designed to facilitate the entry of water samples, its upper end is connected to the lifting end of the lifting assembly, and a telescopic assembly is arranged inside it; a fixing plate 5 is installed inside the sampling box 4, and the fixing plate 5 is located below the telescopic assembly. The sampling box 4 has at least one through hole, which is detachably connected to the sampling tube 6 by a thread. Inside the sampling box 4, there is also a movable plate 7, which is located between the telescopic component and the fixed plate 5. Its upper end is connected to the telescopic end of the telescopic component and to the upper end of the connecting rod 8. There is also a movable plug 9 connected to the lower end of the connecting rod 8. It is set one-to-one with the sampling tube 6. The size of the movable plug 9 matches the inner diameter of the sampling tube 6. In the initial state, the movable plug 9 tightly seals the opening of the sampling tube 6 to prevent the water sample from entering in advance. The edge of the movable plug 9 facing the sampling tube 6 is arc-shaped.

[0035] Reference Figure 2The push-pull assembly comprises a fixed rod 10, a sliding groove 11, a first screw rod 12, a first motor 13, a sliding block 14 and a limiting groove. The fixed rod 10 is connected with the upper end of the supporting rod 2. The sliding groove 11 is arranged in the fixed rod 10 in the horizontal direction. The first screw rod 12 is rotatably connected in the sliding groove 11 through a bearing (not shown in the figure). The first motor 13 is a waterproof motor. The first motor 13 is detachably connected with the side wall of the fixed rod 10 through bolts. The output shaft of the first motor 13 is rotatably penetrated through the fixed rod 10 and is in transmission connection with the first screw rod 12, so as to ensure that the first screw rod 12 can rotate at a constant speed under the drive of the first motor 13. The sliding block 14 is threadedly rotatable on the first screw rod 12. The lower end of the sliding block 14 protrudes out of the sliding groove 11. The lower end of the sliding block 14 is connected with the upper end of the placing box 3, so that the sliding block 14 can drive the placing box 3 to move stably in the horizontal direction along with the rotation of the first screw rod 12. Meanwhile, the limiting groove is arranged at the upper end of the sliding groove 11. The sliding block 14 is in close sliding connection with the limiting groove, so as to effectively prevent the sliding block 14 from shaking during the movement and to ensure the stability of the push-pull assembly.

[0036] The lifting assembly comprises a second motor 15, a winding roller 16 and a connecting rope 17. The winding roller 16 is rotatably connected in the placing box 3 in the horizontal direction through a bearing (not shown in the figure). The second motor 15 is also a waterproof motor. The second motor 15 is connected with the side wall of the placing box 3. The output shaft of the second motor 15 is rotatably penetrated through the placing box 3 and is in transmission connection with the winding roller 16. One end of the connecting rope 17 is penetrated through the opening of the placing box 3 and is looped and connected with the side wall of the winding roller 16 in a fixing mode of winding multiple turns and knotting, so as to prevent the connecting rope 17 from falling off. The other end of the connecting rope 17 is connected with the upper end of the sampling box 4 through the opening of the placing box 3.

[0037] With reference to Figures 5-6 The telescopic assembly comprises a guide groove 19, a second screw rod 20, a guide rod 21 and a third motor 22. The opposite side walls of the sampling box 4 are both provided with the guide groove 19 in the vertical direction. One of the guide grooves 19 is rotatably connected with the second screw rod 20 in the vertical direction through a bearing (not shown in the figure), so as to ensure that the second screw rod 20 can rotate flexibly. The other guide groove 19 is fixedly connected with the guide rod 21 in the vertical direction. The guide rod 21 is fixed with the guide groove 19 in a welding mode, so as to ensure that the guide rod 21 is stable and does not shake. The second screw rod 20 is oppositely arranged with the guide rod 21. The third motor 22 is also a waterproof motor. The third motor 22 is connected with the upper end of the sampling box 4. The output shaft of the third motor 22 is rotatably penetrated through the sampling box 4 and is in transmission connection with the second screw rod 20. The opposite side walls of the movable plate 7 are both provided with the limiting block 23. One of the limiting blocks 23 is in sliding connection with the guide rod 21. The other limiting block 23 is in threaded connection with the second screw rod 20. Through the accurate cooperation of the threads, when the second screw rod 20 rotates, the movable plate 7 can move up and down along the guide rod 21 in the vertical direction accurately and stably under the guidance of the guide rod 21.

[0038] With reference to Figures 3-4 The upper end of the sampling box 4 is provided with a connecting part of the lifting assembly, that is, a hanging piece 18 is arranged, the hanging piece 18 is detachably connected with the other end of the connecting rope 17, the hanging piece 18 is a hook, and the sampling box 4 can be quickly detached for maintenance or replacement when needed.

[0039] The upper end of the sampling box 4 is provided with a plurality of water permeable holes 24, when the sampling box 4 enters the sampling layer for sampling, water flows out through the water permeable holes 24.

[0040] The side wall of the sampling box 4 is provided with a box door 25 with a locking function, the box door 25 is connected with the side wall of the sampling box 4 through a hinge (not shown in the figure), and the locking device can adopt a common bolt lock, so that the box door 25 is convenient to open and close, and the sampling staff can take out the sampling tube 6 after sampling and perform cleaning, maintenance and other operations on the inside of the sampling box 4, and the hinge and the bolt lock are made of waterproof materials.

[0041] With reference to Figure 1 The placing box 3 and the sampling box 4 are provided with a measuring assembly, and the measuring assembly is used for displaying the sinking distance of the sampling tube 6.

[0042] The measuring assembly comprises a connecting plate 26, a mounting plate 27, a scale rod 28 and an end plate 29, the side wall of the placing box 3 is provided with the connecting plate 26, the side wall of the sampling box 4 is provided with the mounting plate 27, the connecting plate 26 and the mounting plate 27 are oppositely arranged, one end of the scale rod 28 is fixedly connected with the mounting plate 27 in a welded manner, so as to become an integral whole, the other end of the scale rod 28 is slidably penetrated through the connecting plate 26, the upper end of the sampling tube 6 is flush with the upper end of the fixed plate 5, and the upper end of the mounting plate 27 is flush with the upper end of the fixed plate 5, so that the sinking depth of the sampling tube 6 can be directly and accurately obtained by observing the scale change on the scale rod 28.

[0043] The other end of the scale rod 28 is provided with the end plate 29, and the end plate 29 plays a limiting role and prevents the scale rod 28 from being detached from the connecting plate 26.

[0044] The working principle of the device is as follows: when the device is used, the staff carries the device to a sampling point, so that the bottom plate 1 stably contacts the ground and ensures that the whole device is stable and does not shake, when the whole device is sampling, the staff can step on the bottom plate 1 or press a heavy object (for example, a stone) on the bottom plate 1, so as to maintain the stability of the whole device.

[0045] Then the first motor 13 is started, the first motor 13 drives the first screw rod 12 to rotate, since the sliding block 14 is threadedly connected with the first screw rod 12 and is in sliding fit with the limiting groove of the sliding groove 11, the sliding block 14 will move along the sliding groove 11 in the horizontal direction, thereby driving the placing box 3 connected therewith to move synchronously, and the staff can accurately adjust the horizontal position of the placing box 3 by controlling the forward and reverse rotation of the first motor 13 according to the sampling target area, so that the sampling box 4 can be aligned above the position of the water body to be sampled.

[0046] When the placing box 3 reaches the appropriate horizontal position, the second motor 15 is started, the second motor 15 drives the winding roller 16 to rotate, the connecting rope 17 is wound or unwound, the connecting rope 17 drives the sampling box 4 to ascend or descend, and the vertical position of the sampling box 4 is accurately controlled in combination with the depth information displayed by the scale rod 28 in the measuring assembly, so that the sampling tube 6 reaches the predetermined sampling depth.

[0047] When the sampling box 4 reaches the specified depth, the third motor 22 is started, the third motor 22 drives the second screw rod 20 to rotate, since the limiting block 23 of the movable plate 7 is threadedly connected with the second screw rod 20 and is in sliding fit with the guide rod 21, the movable plate 7 will move downward in the vertical direction, and the movable plug 9 is driven to move upward synchronously through the connecting rod 8, at this time, the movable plug 9 leaves the opening of the sampling tube 6, and the water sample enters the sampling tube 6 smoothly under the action of water pressure, and the sampling process is completed.

[0048] After sampling is completed, the third motor 22 is started in reverse, the movable plate 7 moves downward, the movable plug 9 reseals the opening of the sampling tube 6, so that the water sample is prevented from leaking, then the sampling box 4 is lifted by the second motor 15, so that it returns to the initial height, and the placing box 3 is moved to a position convenient for the staff to operate by using the first motor 13.

[0049] The box door 25 on the side wall of the sampling box 4 is opened, the sampling tube 6 loaded with the water sample is taken out, subsequent water sample detection, analysis and the like are carried out, and the inside of the sampling box 4 is cleaned as necessary, so that whether each component is damaged or abnormal is checked, and preparation for the next sampling is made.

[0050] In the description of the utility model, it is to be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0051] The above-described embodiments are merely preferred modes of the present application, and are not intended to limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A water quality sampling device for water ecological monitoring, characterized in that, include: The base plate (1) has a support rod (2) installed at its upper end in the vertical direction; The push-pull assembly is arranged horizontally and is connected to the upper end of the support rod (2). Its push-pull end is connected to the placement box (3) with the lower opening. The lifting assembly is installed inside the placement box (3); The sampling box (4) has an opening at its lower end and its upper end is connected to the lifting end of the lifting assembly. A telescopic assembly is installed inside it. A fixing plate (5) is arranged inside the sampling box (4) and located below the telescopic assembly. It has at least one through hole, and the through hole and the sampling tube (6) are detachably connected. A movable plate (7) is arranged inside the sampling box (4) and located between the telescopic assembly and the fixed plate (5). Its upper end is connected to the telescopic end of the telescopic assembly, and it is connected to the upper end of the connecting rod (8); and The movable plug (9) is connected to the lower end of the connecting rod (8), and is set in a one-to-one correspondence with the sampling tube (6).

2. The water quality sampling device for water ecological monitoring according to claim 1, characterized in that, The push-pull assembly includes a fixed rod (10), a slide groove (11), a first screw (12), a first motor (13), a slider (14), and a limiting groove. The fixed rod (10) is connected to the upper end of the support rod (2). The fixed rod (10) is provided with a slide groove (11) in the horizontal direction. The first screw (12) is rotatably connected in the slide groove (11). The first motor (13) is connected to the side wall of the fixed rod (10). The output shaft of the first motor (13) rotatably passes through the fixed rod (10) and is connected to the first screw (12). The slider (14) is threaded on the first screw (12). The lower end of the slider (14) protrudes from the slide groove (11). The lower end of the slider (14) is connected to the upper end of the placement box (3). The upper end of the slide groove (11) is provided with a limiting groove. The slider (14) and the limiting groove are slidably connected.

3. The water quality sampling device for water ecological monitoring according to claim 2, characterized in that, The lifting assembly includes a second motor (15), a take-up roller (16), and a connecting rope (17). The take-up roller (16) is rotatably connected to the placement box (3) in the horizontal direction. The second motor (15) is connected to the side wall of the placement box (3). The output shaft of the second motor (15) rotatably passes through the placement box (3) and is connected to the take-up roller (16) for transmission. One end of the connecting rope (17) passes through the opening of the placement box (3) and is connected to the side wall of the take-up roller (16). The upper end of the sampling box (4) is connected to the other end of the connecting rope (17).

4. The water quality sampling device for water ecological monitoring according to claim 2, characterized in that, The telescopic assembly includes a guide groove (19), a second screw (20), a guide rod (21), and a third motor (22). The opposite sidewalls of the sampling box (4) are provided with guide grooves (19) in the vertical direction. One of the guide grooves (19) is rotatably connected to the second screw (20) in the vertical direction, and the other guide groove (19) is fixedly connected to the guide rod (21) in the vertical direction. The second screw (20) and the guide rod (21) are arranged opposite to each other. The third motor (22) is connected to the upper end of the sampling box (4). The output shaft of the third motor (22) rotates through the sampling box (4) and is connected to the second screw (20) in a transmission connection. The opposite sidewalls of the movable plate (7) are provided with limit blocks (23). One of the limit blocks (23) is slidably connected to the guide rod (21), and the other limit block (23) is threadedly connected to the second screw (20).

5. The water quality sampling device for water ecological monitoring according to claim 3, characterized in that, The upper end of the sampling box (4) is provided with a suspension member (18), and the other end of the suspension member (18) and the connecting rope (17) are detachably connected.

6. The water quality sampling device for water ecological monitoring according to any one of claims 1 to 5, characterized in that, The upper end of the sampling box (4) is provided with several water-permeable holes (24).

7. The water quality sampling device for water ecological monitoring according to any one of claims 1 to 5, characterized in that, The sampling box (4) has a door (25) with a locking function on its side wall.

8. The water quality sampling device for water ecological monitoring according to claim 1, characterized in that, The placement box (3) and the sampling box (4) are equipped with a measuring component, which is used to display the distance the sampling tube (6) sinks.

9. The water quality sampling device for water ecological monitoring according to claim 8, characterized in that, The measuring assembly includes a connecting plate (26), a mounting plate (27), a scale rod (28), and an end plate (29). The side wall of the placement box (3) is provided with a connecting plate (26), and the side wall of the sampling box (4) is provided with a mounting plate (27). The connecting plate (26) and the mounting plate (27) are arranged opposite to each other. One end of the scale rod (28) is fixedly connected to the mounting plate (27), and the other end of the scale rod (28) slides through the connecting plate (26). The upper end of the sampling tube (6) is flush with the upper end of the fixing plate (5), and the upper end of the mounting plate (27) is flush with the upper end of the fixing plate (5).

10. The water quality sampling device for water ecological monitoring according to claim 9, characterized in that, An end plate (29) is provided at the other end of the scale rod (28).

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