CN117783007A - Water quality detection and analysis equipment and method - Google Patents

Abstract

The invention relates to the technical field of water quality detection and discloses a water quality detection and analysis device and a method, wherein the device comprises a floating ship; the collecting assembly comprises a winding roller and a collecting piece, one end of a rope is fixedly connected to the winding roller, a collecting and releasing hole is formed in the floating ship, the other end of the rope penetrates through the collecting and releasing hole and is fixedly connected with a collecting box, the collecting piece is arranged in the collecting box, and the collecting piece is used for collecting water samples; the detection assembly comprises a plurality of detection pieces, a plurality of cavities are formed in the floating ship, the detection pieces are respectively arranged in the cavities and are communicated with the collecting holes, the water sample collected by the collection pieces is used for being conveyed into the detection pieces, and the detection pieces detect the water sample; the analysis assembly comprises a plurality of analysis devices, the analysis devices are respectively arranged in the cavities, and the analysis devices are used for carrying out data analysis on the water sample in the detection piece. The invention realizes water sample collection of different depths in different places, avoids doping pollution of water samples of different depths, has wide detection range and ensures the accuracy of detection data.

Description

Water quality detection and analysis equipment and method

Technical Field

The invention relates to the technical field of water quality detection, in particular to a water quality detection analysis device and a water quality detection analysis method.

Background

The water quality detection plays an important role in water environment protection, water pollution treatment and water environment health maintenance, and can provide data and information for environmental management and environmental science research, determine the distribution of pollutants in a water body, track the sources of the pollutants and the like. Has important significance for carrying out deep theoretical research on water environment and pollution.

In the detection equipment in the prior art, fixed-point sampling is usually carried out on the bank of the river manually, detection analysis is carried out on the acquired water sample, and the water sample collected on the bank at fixed point cannot represent water quality conditions of different positions and different depths aiming at the large-area flowing river, so that larger errors exist between subsequent overall data and actual conditions, and final water quality analysis is influenced. In addition, in the prior art, the situation that the deep water is sampled and doped with an upper water sample exists in the process of taking out the deep water, so that final detection data is affected.

Therefore, a water quality detecting and analyzing apparatus and method for solving the above problems are needed.

Disclosure of Invention

The invention aims to provide a water quality detection and analysis device and a water quality detection and analysis method, which are used for solving the problems in the prior art.

In order to achieve the above object, the present invention provides the following solutions: the invention provides a water quality detection and analysis device, comprising:

a floating vessel floating on the water surface and moving on the water surface by a propeller;

the collecting assembly comprises a wind-up roller and a collecting piece, wherein the wind-up roller is fixedly connected to the top end of the floating ship, one end of a rope is fixedly connected to the wind-up roller, a winding and unwinding hole is formed in the floating ship, the other end of the rope penetrates through the winding and unwinding hole and is fixedly connected with a collecting box, the collecting piece is arranged in the collecting box, and the collecting piece is used for collecting a water sample;

the detection assembly comprises a plurality of detection pieces, a plurality of cavities are formed in the floating ship, the detection pieces are respectively arranged in the cavities and are communicated with the collecting holes, the water sample collected by the collection pieces is used for being conveyed into the detection pieces, and the detection pieces are used for detecting the water sample;

the analysis assembly comprises a plurality of analysis devices, the analysis devices are respectively arranged in the cavities, and the analysis devices are used for carrying out data analysis on the water sample in the detection piece.

Preferably, the collecting piece includes fixed connection in the collecting box, equidistant fixedly connected with a plurality of sampling tube's of collecting pipe lateral wall bottom along circumference one end, the sampling tube other end runs through the collecting box is located outside the collecting box, separate into cavity and lower cavity through the movable block in the collecting pipe, the sampling tube with cavity intercommunication down, fixedly connected with electric telescopic handle in the collecting box, electric telescopic handle's flexible end stretches into in the collecting pipe with movable block fixed connection, the sampling tube is located the one end outside the collecting box is provided with the sealing member, the sealing member with last cavity intercommunication.

Preferably, the sealing element comprises a fixing ring fixedly connected with one end of the sampling tube, a plurality of pipelines are arranged in the fixing ring at equal intervals along the circumferential direction, one end of each pipeline is communicated with the upper cavity through a first conduit, a plurality of sealing plates are connected in the fixing ring in a sliding manner, the sealing plates are sleeved on the pipelines, a sliding block is fixedly connected in each sealing plate, and the sliding blocks extend into the pipelines and are in sliding connection with the pipelines.

Preferably, the detecting part comprises a detecting pipe fixedly connected in the cavity, one end of a second guide pipe is fixedly connected to the top of the outer side wall of the detecting pipe, the other end of the second guide pipe stretches into the retraction hole and is provided with a limiting part, a stirring rod is rotationally connected in the detecting pipe, a second motor is fixedly connected in the cavity, one end of the stirring rod stretches out of the detecting pipe and is fixedly connected with an output shaft of the second motor, a reagent storage box is arranged in the cavity, and the output end of the reagent storage box is communicated with the detecting pipe.

Preferably, the limiting part comprises a butt joint pipe with one end slidably connected to the second guide pipe, the other end of the butt joint pipe is in butt joint with the fixing ring, the butt joint pipe is identical to the inner diameter of the fixing ring, a supporting ring is fixedly connected to the second guide pipe, a plurality of springs are arranged between the supporting ring and the butt joint pipe, and two ends of each spring are fixedly connected with the butt joint pipe and the second guide pipe respectively.

Preferably, the first balancing weight is slidably connected in the retraction hole, the first balancing weight is located above the collection box, the rope penetrates through the first balancing weight, a first inclined surface and a second inclined surface are respectively arranged on the side of the bottom end of the first balancing weight and the side of the outer ring of the butt joint pipe, and the first inclined surface is in sliding contact with the second inclined surface.

Preferably, the bottom end of the collecting box is of an inverted conical structure, a second balancing weight is arranged in the conical structure, a third inclined surface is arranged on the side of the top end of the collecting box, and the third inclined surface is in sliding contact with the second inclined surface.

Preferably, a plurality of guide grooves are formed in the inner side wall of the retraction hole at equal intervals along the circumferential direction, a plurality of guide blocks are fixedly connected to the outer side wall of the collection box along the circumferential direction, and the guide blocks are matched with the guide grooves.

Preferably, the sampling pipe is close to the one end fixedly connected with filter screen of solid fixed ring, the closing plate is fan-shaped structure, and a plurality of closing plate concatenation becomes circular structure and realizes the seal to sampling pipe one end, just circular structure with the filter screen contact sets up.

A water quality detection and analysis method, comprising the steps of:

s1, moving a floating ship to a specified collection position, and rotating a collection box to a specified depth below the water surface through a wind-up roll;

s2, collecting and sampling water with a specified depth through a collecting piece;

s3, after the sampling is completed, lifting the collecting box through the rotation of the wind-up roll, and recovering the collecting box into the collecting hole;

s4, transferring the water sample in the sampling piece to a detection piece for detection after recovery;

s5, after detection is completed, analysis is carried out through an analysis device.

Compared with the prior art, the invention has the following advantages and technical effects:

according to the water quality detection and analysis equipment and the water quality detection and analysis method, the floating ship floats on the water surface and moves through the propeller to collect water samples at different places, the collecting box is placed to the designated depth underwater through the rolling roller after the water samples are selected, the collecting box is collected through the collecting piece, the collecting box is recovered to the collecting hole through the rolling roller after the water samples are collected, the water samples collected in the collecting piece are conveyed to the detecting piece to be detected, and the data extraction and analysis are carried out through the analysis device after the detection is completed. The water sample collection of different depths in different places is realized to this application, avoids the doping pollution of different degree of depth water samples, and detection range is wide, guarantees the accuracy of detection data.

Drawings

For a clearer description of an embodiment of the invention or of the solutions of the prior art, the drawings that are needed in the embodiment will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art:

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the structure of the collection box of the present invention;

FIG. 3 is a schematic view of the structure of the collecting member of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3A in accordance with the present invention;

FIG. 5 is a schematic view of the structure of the detecting member according to the present invention;

FIG. 6 is an enlarged view of a portion of the invention at B in FIG. 5;

FIG. 7 is a schematic view of a guide slot structure according to the present invention;

wherein, 1, a floating ship; 2. a wind-up roll; 3. a rope; 4. a receiving and releasing hole; 5. a collection box; 6. an analysis device; 7. a collection pipe; 8. a sampling tube; 9. a moving block; 10. an upper cavity; 11. a lower cavity; 12. an electric telescopic rod; 13. a fixing ring; 14. a pipe; 15. a first conduit; 16. a sealing plate; 17. a slide block; 18. a detection tube; 19. a second conduit; 20. a stirring rod; 21. a second motor; 22. a reagent storage tank; 23. a butt joint pipe; 24. a support ring; 25. a spring; 26. a first balancing weight; 27. a second balancing weight; 28. a guide groove; 29. a guide block; 30. and (3) a filter screen.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 1 to 7, the present invention provides a water quality detection and analysis apparatus comprising:

a floating vessel 1, wherein the floating vessel 1 floats on the water surface and moves on the water surface through a propeller;

the collecting assembly comprises a wind-up roller 2 and a collecting piece, wherein the wind-up roller 2 is fixedly connected to the top end of the floating ship 1, one end of a rope 3 is fixedly connected to the wind-up roller 2, a winding and unwinding hole 4 is formed in the floating ship 1, the other end of the rope 3 penetrates through the winding and unwinding hole 4 and is fixedly connected with a collecting box 5, the collecting piece is arranged in the collecting box 5, and the collecting piece is used for collecting water samples;

the detection assembly comprises a plurality of detection pieces, a plurality of cavities are formed in the floating boat 1, the detection pieces are respectively arranged in the cavities and are communicated with the collecting and releasing holes 4, water samples collected by the collection pieces are used for being conveyed into the detection pieces, and the detection pieces detect the water samples;

the analysis assembly comprises a plurality of analysis devices 6, the analysis devices 6 are respectively arranged in the cavities, and the analysis devices 6 are used for carrying out data analysis on the water sample in the detection piece.

Further optimizing scheme, collection piece includes collecting pipe 7 of fixed connection in collection box 5, the equidistant fixedly connected with of circumference is followed to collecting pipe 7 lateral wall bottom a plurality of sampling pipe 8's one end, sampling pipe 8 other end runs through collection box 5 and is located outside the collection box 5, separate into cavity 10 and cavity 11 down through movable block 9 in the collecting pipe 7, sampling pipe 8 and cavity 11 intercommunication down, fixedly connected with electric telescopic handle 12 in the collection box 5, electric telescopic handle 12's flexible end stretches into in the collection pipe 7 with movable block 9 fixed connection, sampling pipe 8 is located the one end outside the collection box 5 and is provided with the sealing member, the sealing member communicates with last cavity 10.

The electric telescopic rod 12 drives the moving block 9 to move upwards, and when the moving block 9 moves, the air pressure in the lower cavity 11 is regulated to absorb external water into the lower cavity 11.

Further optimizing scheme, the sealing member includes fixed ring 13 of fixed connection in sampling pipe 8 one end, has offered a plurality of pipelines 14 along circumference equidistant in the fixed ring 13, and pipeline 14 one end is through first pipe 15 and last cavity 10 intercommunication, and fixed ring 13 sliding connection has a plurality of closing plates 16, and closing plate 16 cover is established on pipeline 14, and closing plate 16 internal fixation has slider 17, and slider 17 stretches into pipeline 14 in with pipeline 14 sliding connection.

The gas in the upper cavity 10 is conveyed into the pipeline 14 to extrude the sealing plate 16 to move towards the center of the fixed ring 13, so that the butt joint of a plurality of sealing plates 16 is realized, the sealing of the sampling tube 8 is realized after the butt joint, and the situation that the sampling tube 8 is doped with water samples with other depths when moving upwards is avoided.

Further optimizing scheme, the detecting part includes the detecting tube 18 of fixed connection in the cavity, the one end of detecting tube 18 lateral wall top fixedly connected with second pipe 19, the second pipe 19 other end stretches into in the receive and release hole 4 and is provided with the locating part, the rotatory puddler 20 that is connected with of detecting tube 18, fixedly connected with second motor 21 in the cavity, the output shaft fixed connection of detecting tube 18 and second motor 21 is stretched out to puddler 20 one end, be provided with reagent storage box 22 in the cavity, the output and the detecting tube 18 intercommunication of reagent storage box 22.

The detection tube 18 stores the collected water sample, a plurality of storage cavities are arranged in the reagent storage box 22, different reagents are stored respectively, different reagents are placed according to detection requirements, and the stirring rod 20 is driven by the second motor 21 to rotate so as to ensure uniform mixing of the water sample and the reagents, so that detection is realized.

Further optimizing scheme, the locating part includes that one end sliding connection is at butt joint pipe 23 on second pipe 19, butt joint pipe 23 other end and solid fixed ring 13 butt joint, and butt joint pipe 23 is the same with solid fixed ring 13 internal diameter, fixedly connected with support ring 24 on the second pipe 19, is provided with a plurality of springs 25 between support ring 24 and the butt joint pipe 23, and spring 25 both ends are respectively with butt joint pipe 23 and second pipe 19 fixed connection.

The butt joint pipe 23 is recovered and popped up through the spring 25, so that stable sealing is ensured when the butt joint pipe contacts the fixed ring 13, and water sample is prevented from flowing out during transfer.

Further optimizing scheme, sliding connection has first balancing weight 26 in receive and release hole 4, and first balancing weight 26 is located collecting box 5 top, and rope 3 runs through first balancing weight 26, and first balancing weight 26 bottom side and butt joint pipe 23 outer lane side are provided with first inclined plane and second inclined plane respectively, first inclined plane and second inclined plane sliding contact.

The first balancing weight 26 is located in the collecting and releasing hole 4 and on the collecting box 5, when the collecting box 5 moves out, the first balancing weight 26 moves downwards and extrudes the butt joint pipe 23 to be recovered, sealing of the butt joint pipe 23 is achieved, and water is prevented from flowing into the butt joint pipe 23.

Further optimizing scheme, collection box 5 bottom is the conical structure of handstand, is provided with second balancing weight 27 in the conical structure, and collection box 5 top avris is provided with the third inclined plane, third inclined plane and second inclined plane sliding contact.

The second inclined surface on the collecting box 5 is contacted with the second inclined surface for extruding the butt joint pipe 23 for recycling, and when the butt joint pipe 23 and the sampling pipe 8 are at the same horizontal height, the butt joint pipe pops up to butt joint with the sampling pipe 8.

Further optimizing scheme, a plurality of guide slots 28 are formed in the inner side wall of the collecting and releasing hole 4 at equal intervals along the circumferential direction, a plurality of guide blocks 29 are fixedly connected to the outer side wall of the collecting box 5 along the circumferential direction, and the guide blocks 29 are matched with the guide slots 28.

The bottom of the guide groove 28 is provided with a horn-shaped opening, and the guide block 29 enters the guide groove 28 from the horn mouth and gradually moves and is regulated, so that the sampling tube 8 and the butt joint tube 23 are positioned on the same axis, and the follow-up accurate butt joint is convenient.

Further optimizing scheme, the one end fixedly connected with filter screen 30 that sampling pipe 8 is close to solid fixed ring 13, and closing plate 16 is fan-shaped structure, and circular structure is spliced into to a plurality of closing plates 16 and is realized the sealing to sampling pipe 8 one end, and circular structure and filter screen 30 contact setting.

The filter screen 30 is used for filtering impurities in water, avoiding the impurities from flowing into the collecting pipe 7, and the sealing plate 16 is contacted with the filter screen 30 and is used for removing the impurities adsorbed on the filter screen 30 when the filter screen is closed.

A water quality detection and analysis method, comprising the steps of:

s1, a floating boat 1 moves to a designated collection position, and a collection box 5 is placed under the water surface to a designated depth through rotation of a wind-up roll 2;

the floating boat 1 is controlled to move to the appointed water surface position by remote control, and the collecting box 5 is placed in a rotating mode through the wind-up roll 2 to extend to the appointed extension below the water surface.

S2, collecting and sampling water with a specified depth through a collecting piece;

the electric telescopic rod 12 drives the movable block 9 to move upwards, when the movable block 9 moves, the air pressure in the lower cavity 11 is regulated to absorb external water into the lower cavity 11, meanwhile, the air in the upper cavity 10 is conveyed into the pipeline 14 to extrude the sealing plate 16 to move towards the center of the fixed ring 13, the butt joint of a plurality of sealing plates 16 is realized, the sealing of the sampling tube 8 is realized after the butt joint, and the water sample with the rest depth is doped in the sampling tube 8 during the upward movement is avoided.

S3, after the sampling is completed, the collecting box 5 is lifted by the rotation of the wind-up roll 2 and is recovered into the collecting hole 4;

the collecting box 5 is recovered into the collecting and releasing hole 4, the guide block 29 on the collecting box 5 stretches into the guide groove 28, the fixed ring 13 and the butt joint pipe 23 are positioned on the same axis by the guide groove 28, and the collecting box 5 moves to extrude the butt joint pipe 23 for recovery.

S4, transferring the water sample in the sampling piece to a detection piece for detection after recovery;

when the butt joint pipe 23 and the fixed ring 13 are positioned on the same plane, the butt joint pipe 23 is ejected to butt joint with the fixed ring 13, the movable block 9 is controlled to move downwards, the recovery sealing plate 16 is communicated with the second guide pipe 19 and the sampling pipe 8 during movement, water samples in the sampling pipe 8 are extruded and conveyed into the detection pipe 18, corresponding reagents are conveyed into the sampling pipe 8 through the reagent storage box 22, and chemical reaction is completed through stirring of the stirring rod 20, so that detection is realized.

And S5, after detection is completed, analyzing by an analysis device 6.

The analysis device 6 comprises an image acquisition module and an image analysis module, the detection tube 18 is made of transparent materials, the image acquisition module is used for acquiring color data of a water sample in the detection tube 18, the image analysis module is used for analyzing the color of the image to obtain data of detection parameters of the sampled water body, and the specific image acquisition module and the specific image analysis module are in the prior art and are not specifically described herein.

In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims (10)

1. A water quality testing analysis device, comprising:

a floating vessel (1), the floating vessel (1) floating on the water surface and moving on the water surface by means of a propeller;

the collecting assembly comprises a wind-up roller (2) and a collecting piece, wherein the wind-up roller (2) is fixedly connected to the top end of the floating boat (1), one end of a rope (3) is fixedly connected to the wind-up roller (2), a collecting and releasing hole (4) is formed in the floating boat (1), the other end of the rope (3) penetrates through the collecting and releasing hole (4) and is fixedly connected with a collecting box (5), the collecting piece is arranged in the collecting box (5), and the collecting piece is used for collecting a water sample;

the detection assembly comprises a plurality of detection pieces, a plurality of cavities are formed in the floating ship (1), the detection pieces are respectively arranged in the cavities and are communicated with the collecting and releasing holes (4), water samples collected by the collection pieces are used for being conveyed into the detection pieces, and the detection pieces detect the water samples;

the analysis assembly comprises a plurality of analysis devices (6), wherein the analysis devices (6) are respectively arranged in the cavities, and the analysis devices (6) are used for carrying out data analysis on the water sample in the detection piece.

2. A water quality testing analysis apparatus according to claim 1, wherein: the collecting piece includes fixed connection collecting pipe (7) in collecting box (5), collecting pipe (7) lateral wall bottom is followed equidistant fixedly connected with a plurality of sampling pipe (8) one end in circumference, sampling pipe (8) other end runs through collecting box (5) are located outside collecting box (5), separate into cavity (10) and cavity (11) down through movable block (9) in collecting pipe (7), sampling pipe (8) with cavity (11) intercommunication down, fixedly connected with electric telescopic handle (12) in collecting box (5), electric telescopic handle (12) stretch into in collecting pipe (7) with movable block (9) fixed connection, sampling pipe (8) are located the one end outside collecting box (5) is provided with the sealing member, the sealing member with cavity (10) intercommunication down.

3. A water quality testing analysis apparatus according to claim 2, wherein: the sealing member includes fixed ring (13) of fixed connection in sampling pipe (8) one end, a plurality of pipelines (14) have been seted up along circumference equidistant in fixed ring (13), pipeline (14) one end pass through first pipe (15) with go up cavity (10) intercommunication, sliding connection has a plurality of closing plates (16) in fixed ring (13), closing plate (16) cover is established on pipeline (14), fixedly connected with slider (17) in closing plate (16), slider (17) stretch into in pipeline (14) with pipeline (14) sliding connection.

4. A water quality testing analysis apparatus according to claim 3, wherein: the detection piece includes fixed connection detection tube (18) in the cavity, the one end of detection tube (18) lateral wall top fixedly connected with second pipe (19), the second pipe (19) other end stretches into in receive and release hole (4) and be provided with the locating part, detection tube (18) internal rotation is connected with puddler (20), fixedly connected with second motor (21) in the cavity, puddler (20) one end stretches out detection tube (18) with the output shaft fixed connection of second motor (21), be provided with reagent storage box (22) in the cavity, the output of reagent storage box (22) with detection tube (18) intercommunication.

5. The water quality detecting and analyzing apparatus according to claim 4, wherein: the limiting piece comprises a butt joint pipe (23) with one end slidingly connected to the second guide pipe (19), the other end of the butt joint pipe (23) is in butt joint with the fixed ring (13), the butt joint pipe (23) is identical to the inner diameter of the fixed ring (13), a supporting ring (24) is fixedly connected to the second guide pipe (19), a plurality of springs (25) are arranged between the supporting ring (24) and the butt joint pipe (23), and two ends of each spring (25) are respectively fixedly connected with the butt joint pipe (23) and the second guide pipe (19).

6. The water quality detection and analysis device according to claim 5, wherein: the utility model discloses a collecting box, including collection box (5), rope (3), receive and release hole (4) in the inside sliding connection have first balancing weight (26), first balancing weight (26) are located collection box (5) top, just rope (3) run through first balancing weight (26), first balancing weight (26) bottom avris with butt joint pipe (23) outer lane avris is provided with first inclined plane and second inclined plane respectively, first inclined plane with second inclined plane sliding contact.

7. The water quality detection and analysis apparatus according to claim 6, wherein: the bottom end of the collection box (5) is of an inverted conical structure, a second balancing weight (27) is arranged in the conical structure, a third inclined surface is arranged on the side of the top end of the collection box (5), and the third inclined surface is in sliding contact with the second inclined surface.

8. The water quality testing analysis device of claim 7, wherein: a plurality of guide grooves (28) are formed in the inner side wall of the collecting and releasing hole (4) at equal intervals along the circumferential direction, a plurality of guide blocks (29) are fixedly connected to the outer side wall of the collecting box (5) along the circumferential direction, and the guide blocks (29) are matched with the guide grooves (28).

9. The water quality testing analysis device of claim 8, wherein: the sampling pipe (8) is close to one end fixedly connected with filter screen (30) of solid fixed ring (13), closing plate (16) are fan-shaped structure, and a plurality of closing plate (16) splice into circular structure and realize the seal to sampling pipe (8) one end, just circular structure with filter screen (30) contact setting.

10. A water quality detection and analysis method, which is applicable to a water quality detection and analysis device according to any one of claims 1 to 9, and is characterized by comprising the following steps:

s1, a floating ship (1) moves to a designated collection position, and a collection box (5) is rotatably placed to a designated depth below the water surface through a wind-up roll (2);

s2, collecting and sampling water with a specified depth through a collecting piece;

s3, after the sampling is completed, the collecting box (5) is lifted by rotation of the wind-up roll (2) and is recovered into the collecting hole (4);

s4, transferring the water sample in the sampling piece to a detection piece for detection after recovery;

s5, after detection is completed, analysis is carried out through an analysis device (6).