A water sample and suspended matter in-situ combined sampling device and sampling method

Abstract

The present invention provides a water sample and suspended matter in-situ joint sampling device and sampling method, comprising a sampling cylinder, wherein the interior of the sampling cylinder is divided into a water sample collection chamber and a suspended matter enrichment chamber distributed up and down, a water sample inlet is provided at the top of the water sample collection chamber, and a first solenoid valve is installed at the water sample inlet position; a water flow inlet and a water flow outlet are provided on the side wall of the suspended matter enrichment chamber, an arc-shaped filter assembly is installed in the suspended matter enrichment chamber, and the water flow inlet and the water flow outlet are located on both sides of the filter assembly, and the outer convex arc surface of the filter assembly is a working surface, and the working surface faces the water flow inlet side of the suspended matter enrichment chamber; a second solenoid valve is installed at the water flow inlet position of the suspended matter enrichment chamber, and a submersible pump is installed at the outlet position of the suspended matter enrichment chamber, and the first solenoid valve, the second solenoid valve and the submersible pump are all connected to a control system. The present invention can realize the simultaneous sampling of water samples and suspended matter, improve the sampling efficiency, and reduce the blockage problem in the suspended matter sampling process.

Description

Technical Field

[0001] The invention relates to the technical field of water sample and suspended matter sampling, and in particular to an in-situ combined sampling device and sampling method for water sample and suspended matter. Background Art

[0002] Pollutants in water bodies often exist in dissolved, suspended and deposited forms. Among them, suspended solids are solid substances suspended in water. They are complex pollutants with high pollution concentrations and prominent sensory and olfactory effects. During the operation of water source reservoirs, the water in the reservoir is mostly input in the form of large flow, and small flow is uniformly taken from the upper layer and output, resulting in a large amount of suspended solids accumulating in the reservoir.

[0003] At present, there are two main methods for collecting suspended matter samples. The first method is to first use a submersible pump or other methods to pump a large amount of water onto a ship or shore, then transfer the sample to a laboratory on shore, and enrich and filter the water containing suspended matter. The disadvantage of this method is that after the water is pumped ashore by a water pump, the suspended matter sample in situ is disturbed, resulting in irregular diffusion of fine suspended matter in the water, mutual adsorption and sedimentation of suspended particles, etc., destroying the original material form of the water sample and affecting the sample data analysis. There is a second method in the prior art, which uses a filter device to directly put it into the water for filtering and enrichment. Although it avoids disturbing the suspended matter sample, after working for a period of time, the suspended matter adheres to the surface of the filter device, causing the filter screen to be blocked, and the sampling process is difficult to continue, affecting the sampling efficiency and sampling results. Although there is a related technology that reduces blockage by setting an agitator on the surface of the filter membrane, it has a certain impact on the state of the suspended matter and the original water conditions.

[0004] At present, the device used for water sampling generally includes a sampler and a rope. One end of the rope is connected to the sampler, and the other end is held by the operator. Sampling is performed by placing the sampler into the water. However, when sampling water samples and suspended matter, two different sets of devices are used to sample separately, resulting in low sampling efficiency. It is difficult to ensure that water samples and suspended matter samples at the same level are obtained, which is not conducive to comparative analysis of chemical composition. Summary of the invention

[0005] The purpose of the present invention is to provide a water sample and suspended matter in-situ combined sampling device and sampling method to solve the blockage problem in the suspended matter collection process and improve the sampling efficiency.

[0006] The first object of the present invention is to provide a water sample and suspended matter in-situ combined sampling device, which adopts the following scheme:

[0007] It comprises a sampling cylinder, the interior of which is divided into a water sample collection chamber and a suspended matter enrichment chamber which are distributed up and down, a water sample inlet is arranged on the top of the water sample collection chamber, and a first solenoid valve is installed at the water sample inlet position; a water flow inlet and a water flow outlet are arranged on the side wall of the suspended matter enrichment chamber, an arc-shaped filter component is installed in the suspended matter enrichment chamber, and the water flow inlet and the water flow outlet are located on both sides of the filter component, the outer convex arc surface of the filter component is a working surface, and the working surface faces the water flow inlet side of the suspended matter enrichment chamber; a second solenoid valve is installed at the water flow inlet position of the suspended matter enrichment chamber, and a submersible pump is installed at the water flow outlet position of the suspended matter enrichment chamber, and the first solenoid valve, the second solenoid valve and the submersible pump are all connected to a control system.

[0008] As a further technical solution, the suspended matter enrichment chamber is a cylindrical chamber, and the center lines of the water inlet and the water outlet are the same straight line.

[0009] As a further technical solution, the bottom of the sampling tube is sealed with a screw cap, and a horizontal partition is installed in the sampling tube, which divides the inner cavity of the sampling tube into a water sample collection cavity and a suspended matter enrichment cavity distributed vertically.

[0010] As a further technical solution, the filter assembly includes an arc-shaped filter screen and a filter membrane. The arc-shaped filter screen is detachably installed in the suspended matter enrichment chamber, and the filter membrane is fixed on the convex surface of the arc-shaped filter screen.

[0011] As a further technical solution, a flow meter is also installed at the water outlet of the suspended matter enrichment chamber, and the flow meter is connected to the control system mentioned above.

[0012] As a further technical solution, a water level and water temperature sensor is also installed in the water sample collection chamber, and the water level and water temperature sensor is connected to the control system described above.

[0013] As a further technical solution, a light source and an image acquisition element are also installed on the top of the sampling tube, and the light source and the image acquisition element are connected to the control system mentioned above.

[0014] As a further technical solution, the sampling cylinder is connected to a lifting assembly via a cable. The lifting assembly includes a base, a boom and a winding device. One end of the cable is connected to the lifting ring of the sampling cylinder, and the other end is wound around the winding device. The winding device is installed on the boom, and the boom is installed on the base.

[0015] The present invention also proposes a method for sampling water samples and suspended matter using the water sample and suspended matter sampling device, as follows:

[0016] The sampling cylinder is lowered to the target position of the water body, and the control system opens the first solenoid valve to allow the water sample to enter the water sample collection chamber; at the same time, the control system opens the second solenoid valve and starts the submersible pump, and the water at the sampling position of the suspended matter enrichment chamber enters the suspended matter enrichment chamber through the water flow inlet, the filter component intercepts the suspended matter, and the suspended matter is enriched on the filter component. The water flowing through the filter component enters the suspended matter enrichment chamber and is discharged from the water flow outlet; after the suspended matter and water sample are sampled, the control system closes the first solenoid valve, the second solenoid valve and the submersible pump.

[0017] As a further technical solution, water carrying suspended matter enters the suspended matter enrichment chamber through the water inlet, and the suspended matter on the working surface of the filter assembly is enriched on both sides of the center of the filter assembly under the guidance of the water flow.

[0018] Compared with the prior art, the present invention has the following advantages and positive effects:

[0019] (1) In view of the clogging problem existing in the current suspended matter sampling process, the present invention arranges the filter assembly arranged in the suspended matter enrichment chamber into an arc shape, and uses the convex arc surface of the filter assembly as the working surface. The working surface is arranged on the water inlet side of the suspended matter enrichment chamber. The filter assembly cooperates with a submersible pump to increase the effective filtration area while enriching the suspended matter on both sides of the center position of the filter assembly, which can solve the clogging problem of the main working area of ​​the water flow channel, improve the filtration efficiency, and further ensure the sampling efficiency.

[0020] (2) The water sample collection chamber and the suspended matter enrichment chamber of the present invention are arranged in the same sampling tube, so that water sample collection and suspended matter enrichment can be achieved simultaneously at the same position. The water sample can characterize the water pollution situation in the suspended matter enrichment area and meet the comparative analysis requirements during subsequent processing. At the same time, the water sample inlet of the water sample collection chamber and the water flow inlet and water flow outlet of the suspended matter enrichment chamber are located on different surfaces of the sampling tube, thereby avoiding the mutual influence between water sample collection and suspended matter collection.

[0021] (3) The suspended matter of the present invention is filtered in situ, thereby achieving a micro-disturbance effect without adding an agitator as much as possible, reducing the disturbance to the flocculent suspended matter, avoiding changing the state of the pollutants, and improving the effectiveness of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is a schematic diagram of the lifting assembly in Embodiment 1 or Embodiment 2 of the present invention;

[0024] Figure 2It is a schematic diagram of the structure of the sampling tube in Example 1 or Example 2 of the present invention;

[0025] Figure 3 is a schematic diagram of the filter assembly in Example 1 or Example 2 of the present invention;

[0026] In the figure, 1-magnetic suction component, 2-base, 3-handle, 4-winch, 5-cable, 6-pulley, 7-light source, 8-image acquisition element, 9-first solenoid valve, 10-water level sensor, 11-submersible pump, 12-flow meter, 13-filter component, 14-wire, 15-water sample collection chamber, 16-partition, 17-second solenoid valve, 18-suspended matter enrichment chamber, 19-sealing end cover, 20-bayonet, 21-counterweight, 22-water sample inlet, 23-water flow inlet, 24-water flow outlet, 25-filter screen, 26-filter membrane. DETAILED DESCRIPTION

[0027] Example 1

[0028] In a typical embodiment of the present invention, a water sample and suspended matter in-situ joint sampling device is disclosed, which is used for water sample collection and suspended matter enrichment in water bodies, and is particularly suitable for working conditions that require simultaneous water sample collection and in-situ suspended matter enrichment. The device arranges a water sample collection chamber for collecting water samples and a suspended matter enrichment chamber for enriching suspended matter in the same sampling tube. After the sampling tube is slowly placed in the water body, water samples are collected and suspended matter is enriched in the water body within the same range, thereby solving the error problem caused by the inconsistency between the water body sampling area and the suspended matter enrichment area, ensuring the consistency of the suspended matter enriched water body and the collected water sample, improving data reliability, and reducing the deviation caused by the sampling process.

[0029] Combination Figure 1 , Figure 2 The in-situ joint sampling device for water samples and suspended matter disclosed in this embodiment mainly includes a lifting component, a sampling tube, a solenoid valve, a submersible pump, a filtering component, and a control system. The lifting component is connected to the sampling tube and can adjust the position of the sampling tube in the height direction; the partition divides the interior of the sampling tube into two cavities, and a solenoid valve is installed on the side wall of each cavity to block or open the connection between the cavity and the external water body. The cavity for enriching suspended matter is connected to a submersible pump, which can disturb the water body in the enrichment area so that the water body can carry suspended matter into the suspended matter enrichment cavity. After the suspended matter is enriched on the working surface of the filtering component, the water body is discharged from the suspended matter enrichment cavity to achieve in-situ filtration. The in-situ filtration process in the present invention achieves the effect of micro-disturbance without adding a stirrer, etc., reduces the disturbance of flocculent suspended matter, avoids changing the state of pollutants, and improves the effectiveness of sampling. An arc-shaped filtering component is installed in the suspended matter enrichment cavity, and the water flow process is used to guide the suspended matter to enrich on both sides of the center position of the filtering component, solves the blockage problem of the main working area in the water flow channel, and ensures the sampling efficiency.

[0030] Specifically, Figure 1 As shown, the above-mentioned sampling tube is connected to the lifting assembly via a cable 5, and the lifting assembly includes a base 2, a boom and a winding device. One end of the cable 5 is connected to the sampling tube, and the other end is wound on the winding device. The winding device is installed on the boom, and the boom is installed on the base 2.

[0031] Furthermore, in the present embodiment, the winding device adopts an existing winch, which includes a capstan 4 and a handle 3. The capstan 4 is rotatably installed on the boom, and the handle 3 is connected to the capstan 4. The capstan 4 is driven to rotate by the handle 3. One end of the cable 5 is wound on the capstan 4, and the cable 5 is retracted and released when the capstan 4 rotates. The other end of the cable 5 is connected to the sampling tube after passing around the pulley 6. The direction of the cable 5 is changed by the pulley 6, and the winch drives the sampling tube up and down through the cable 5.

[0032] In this embodiment, the base 2 can be installed on the hull, and a magnetic attraction component 1 is arranged on the base 2, and the base 2 is installed on the hull through the magnetic attraction component 1, and the boom is installed on the base 2, and a pulley 6 is installed at the end of the boom. Further, the magnetic attraction component 1 can use magnetic elements such as electromagnets and permanent magnets, and the base 2 can be fixed with the aid of bolt connectors in addition to being fixed with the magnetic attraction component 1.

[0033] like Figure 2 , Figure 3 As shown, the interior of the sampling barrel in this embodiment is divided into a water sample collection chamber 15 and a suspended matter enrichment chamber 18 by a partition. The water sample collection chamber 15 is used to collect water samples at the enrichment position to facilitate subsequent water sample analysis; the suspended matter enrichment chamber 18 allows water to flow through and enrich suspended matter on the filter assembly 13, thereby realizing in-situ enrichment of suspended matter; the water sample collection chamber 15 and the suspended matter enrichment chamber 18 are arranged in the same sampling barrel, so that water sample collection and suspended matter enrichment are collected at the same position, so that the water sample can characterize the water condition in the suspended matter enrichment area, and at the same time, the water sample inlet 22 of the water sample collection chamber 15 and the water flow inlet 23 and the horizontal outlet 24 of the suspended matter enrichment chamber 18 are located on different surfaces of the sampling barrel, the water sample inlet 22 is located on the top surface of the sampling barrel, and the water flow inlet 23 and the water flow outlet 24 are located on the lower side of the sampling barrel, thereby avoiding the mutual influence between water sample collection and suspended matter collection.

[0034] Specifically, a first solenoid valve 9 is installed at the water sample inlet of the water sample collection chamber 15, a second solenoid valve 17 is installed at the water flow inlet of the suspended matter enrichment chamber 18, and a submersible pump 11 is installed at the water flow outlet of the suspended matter enrichment chamber 18. The control system controls the opening and closing of the first solenoid valve 9, the second solenoid valve 17 and the submersible pump 11. The setting of the submersible pump 11 makes the water body only flow from the water flow inlet of the suspended matter enrichment chamber 18 to the water flow outlet of the suspended matter enrichment chamber 18, thereby realizing the unidirectional flow of the water body.

[0035] Furthermore, the above-mentioned suspended matter enrichment chamber 18 is cylindrical, and the center lines of the water inlet 23 and the water outlet 24 of the suspended matter enrichment chamber 18 are the same straight line. The water at the sampling position enters the suspended matter enrichment chamber 18 through the water inlet 23, and is discharged from the suspended matter enrichment chamber 18 through the water outlet 24 after passing through the filter component 13, thereby completing the enrichment of the suspended matter on the filter component 13.

[0036] Furthermore, a filter assembly 13 is provided in the suspended matter enrichment chamber 18. The filter assembly 13 is arc-shaped, and the outer convex arc surface of the filter assembly 13 is a working surface, which faces the inlet side of the suspended matter enrichment chamber; the filter assembly 13 includes an arc-shaped filter screen 25 and a filter membrane 26, the filter screen 25 is detachably installed in the suspended matter enrichment chamber 18, and the filter membrane 26 is fixed on the convex surface of the arc-shaped filter screen 25; the filter screen not only increases the filtration area and improves the efficiency; it also achieves the purpose of preventing clogging during the suspended matter enrichment process, and the filter screen 25 also plays a supporting role for the filter membrane 26, avoiding the problem of deformation of the filter membrane 26 caused by water flow pressure during the filtration process, thereby reducing the filtration efficiency.

[0037] It should be particularly pointed out that the filter assembly 13 in this embodiment is arranged to be arc-shaped, which has a larger filtering area than the flat filter, and the outer convex arc surface of the filter assembly 13 faces the water inlet side of the suspended matter enrichment chamber 18. The water pump 12 acts on the suspended matter enrichment chamber 18 to allow water to enter the suspended matter enrichment chamber 18 through the water inlet 23. The water inlet 23 is directly opposite to the outer arc surface of the filter assembly 13, so that the water flow velocity in the middle of the filter cross section is the largest. When the suspended matter enriched at the center position of the filter assembly 13 reaches a certain amount, it is enriched on both sides of the center position under the guidance of the water flow, so that the filter is not easy to be blocked.

[0038] After one sampling is completed, repeated sampling can be performed by replacing the filter membrane 26 and cleaning the filter screen 25. In this embodiment, in order to facilitate the replacement of the filter membrane 26 and the cleaning of the filter screen 25, the bottom of the sampling tube is sealed by a sealing end cover 19. When the filter component 13 needs to be replaced, the sealing end cover 19 can be unscrewed. By unscrewing the sealing end cover 19, the bottom of the suspended matter enrichment chamber 18 is opened, which facilitates the replacement of the filter component 13. At the same time, in order to increase its filtration area, the two sides of the filter screen are abutted against the two ends of the diameter of the suspended matter enrichment chamber 18, thereby increasing the coverage of the filter screen 25 and the filter membrane 26.

[0039] Furthermore, the water outlet 24 of the suspended matter enrichment chamber 18 is connected to the submersible pump 11 and the flow meter 12 in sequence. The submersible pump 11 is used to form a negative pressure in the suspended matter enrichment chamber 18. The flow rate of the water body driven by the submersible pump 11 is obtained through the flow meter 12, which facilitates feedback adjustment of the submersible pump 11 to form a micro-disturbance effect.

[0040] Furthermore, a water level sensor 10 is installed in the water sample collection cavity 15 for monitoring the water level in the water sample collection cavity.

[0041] Furthermore, a light source 7 and an image acquisition element 8 are installed on the top of the sampling tube. The image acquisition element 8 is put into the water together with the sampling tube to observe the underwater sampling process in real time.

[0042] Furthermore, the above-mentioned light source 7, image acquisition element 8, first solenoid valve 9, second solenoid valve 17, flowmeter 12, water level sensor 10 and submersible pump 11 are respectively connected to the control system through wire 14, the control system controls the opening, closing and brightness of the light source 7, the control system controls the start and stop and power of the submersible pump 11, the control system controls the opening and closing and opening degree of the first solenoid valve 9 and the second solenoid valve 17, the control system obtains the water flow data collected by the flowmeter 12, the control system obtains the video image of the sampling cylinder position obtained by the image acquisition unit, and the control system obtains the water level data of the water sample collection chamber 15 collected by the water level sensor 10. The control system is connected to a mobile power supply to obtain electric energy drive. When the water sample and the suspended matter sampling device reach the designated position, the first solenoid valve 9, the second solenoid valve 17 and the submersible pump 11 are opened to perform water sample sampling and suspended matter enrichment. After the sampling is completed, the sampling cylinder is lifted and the water sample in the water sample collection chamber 15 and the suspended matter sample in the suspended matter enrichment chamber 18 are taken out respectively, and the labels are affixed according to the requirements after sealing, and the sampling work can be performed again after the sampling cylinder is cleaned.

[0043] Furthermore, a counterweight 21 is provided at the bottom of the sampling tube, and the weight of the sampling tube is increased by the counterweight to ensure the stability of the sampling tube in water.

[0044] Example 2

[0045] In another typical embodiment of the present invention, Figure 1-Figure 3 As shown, a sampling method of a water sample and a suspended matter sampling device is provided. The method of sampling using the water sample and the suspended matter sampling device in Example 1 comprises the following steps:

[0046] The sampling cylinder is lowered to the target position of the water body, and the first solenoid valve 9 is opened to allow the water to enter the water sample collection chamber 15 to collect the water sample; the second solenoid valve 17 is opened and the submersible pump 11 is started, and the water at the sampling position of the sampling cylinder enters the suspended matter enrichment chamber 18 through the water body inlet, and the filter component 13 intercepts the suspended matter, and the filtered water flows through the filter component 13 and is discharged from the suspended matter enrichment chamber 18 through the water flow outlet 24;

[0047] The suspended matter is enriched on the filter assembly 13, and after the suspended matter is sampled, the first solenoid valve 9, the second solenoid valve 17 and the submersible pump 11 are closed.

[0048] At the same time, the water body carrying the suspended matter enters the suspended matter enrichment chamber 18 through the water flow inlet, and the suspended matter on the filter assembly 13 moves to both sides of the center position of the filter assembly 13 under the guidance of the water flow.

[0049] In addition, after the water sample collection chamber 15 completes sampling, the first electromagnetic valve 9 can be closed to seal the collected water sample, thereby reducing the impact of water disturbance on the collected water sample during the subsequent enrichment and suspension process.

[0050] In conjunction with Example 1, the specific sampling process is described as follows:

[0051] (1) Fix the boom to the ship through the base 2;

[0052] (2) Move the free end of the sampling tube connecting cable 5 away from the winding device, and fix the temperature and pressure transmitter in the middle of the sampling tube;

[0053] (3) Rotate the capstan 4 to place the sampling tube in water and turn on the light source 7 for illumination.

[0054] (4) When the water level data at the sampling tube is stable, read the temperature value at this time, open the first solenoid valve 9 and the second solenoid valve 17, observe the water sample collected by the water sample collection chamber 15 and the suspended matter collected by the suspended matter enrichment chamber 18, and close the first solenoid valve 9 and the second solenoid valve 17 after the water sample collection is completed and the suspended matter enrichment filter membrane 26 is saturated with adsorption;

[0055] (5) rotating the winch 4, lifting the sampling tube onto the ship, opening the sampling tube, taking out the water sample in the water sampling chamber 15 and affixing a label;

[0056] (6) Open the sealed end cap 19 at the bottom of the suspended matter enrichment chamber 18, take out the suspended matter enriched on the filter membrane 26 and place it in a container with a label attached in advance, then replace the filter membrane 26 to prepare for the next enrichment sampling.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water sample and suspended matter in-situ combined sampling device, characterized in that: It comprises a sampling cylinder, wherein the interior of the sampling cylinder is divided into a water sample collection chamber and a suspended matter enrichment chamber which are arranged in an upper and lower manner, a water sample inlet is arranged at the top of the water sample collection chamber, and a first electromagnetic valve is installed at the water sample inlet position; A water inlet and a water outlet are provided on the side wall of the suspended matter enrichment chamber, an arc-shaped filter assembly is installed in the suspended matter enrichment chamber, and the water inlet and the water outlet are located on both sides of the filter assembly, the outer convex arc surface of the filter assembly is a working surface, and the working surface faces the water inlet side of the suspended matter enrichment chamber; a second solenoid valve is installed at the water inlet position of the suspended matter enrichment chamber, and a submersible pump is installed at the water outlet position of the suspended matter enrichment chamber, and the first solenoid valve, the second solenoid valve and the submersible pump are all connected to the control system; The filter assembly includes an arc-shaped filter screen and a filter membrane, wherein the arc-shaped filter screen is detachably installed in the suspended matter enrichment chamber, and the filter membrane is fixed on the convex surface of the arc-shaped filter screen; The suspended matter enrichment chamber is a cylindrical chamber, and the center lines of the water inlet and the water outlet are the same straight line; The water carrying the suspended matter flows into the suspended matter enrichment chamber through the inlet, and the suspended matter on the working surface of the filter assembly is enriched toward both sides of the center of the filter assembly under the guidance of the water flow.

2. The water sample and suspended matter in-situ combined sampling device according to claim 1, characterized in that: The bottom of the sampling cylinder is sealed with a screw cap, and a horizontally arranged partition is installed in the sampling cylinder. The partition divides the inner cavity of the sampling cylinder into a water sample collection cavity and a suspended matter enrichment cavity distributed vertically.

3. The water sample and suspended matter in-situ combined sampling device according to claim 1, characterized in that: A flow meter is also installed at the outlet of the suspended matter enrichment chamber, and the flow meter is connected to the control system.

4. The water sample and suspended matter in-situ combined sampling device according to claim 1, characterized in that: A water level sensor is also installed in the water sample collection cavity, and the water level sensor is connected to the control system.

5. The water sample and suspended matter in-situ combined sampling device according to claim 1, characterized in that: A light source and an image acquisition element are also installed on the top of the sampling tube, and the light source and the image acquisition element are connected to the control system.

6. The water sample and suspended matter in-situ combined sampling device according to claim 1, characterized in that: The sampling cylinder is connected to a lifting assembly via a cable. The lifting assembly includes a base, a suspension arm and a winding device. One end of the cable is connected to the sampling cylinder, and the other end is wound around the winding device. The winding device is mounted on the suspension arm, and the suspension arm is mounted on the base.

7. A method for sampling water samples and suspended matter using the in-situ combined sampling device for water samples and suspended matter according to any one of claims 1 to 6, characterized in that: as follows: The sampling cylinder is lowered to the target position of the water body, and the control system opens the first solenoid valve to allow the water sample to enter the water sample collection chamber; at the same time, the control system opens the second solenoid valve and starts the submersible pump, and the water at the sampling position of the suspended matter enrichment chamber enters the suspended matter enrichment chamber through the inlet, and the filter component intercepts the suspended matter, and the suspended matter is enriched on the filter component. The filtered water flows through the filter component and is discharged from the suspended matter enrichment chamber through the outlet of the suspended matter enrichment chamber; After the suspended matter and water samples are sampled, the control system closes the first solenoid valve, the second solenoid valve and the submersible pump; The water carrying the suspended matter flows into the suspended matter enrichment chamber through the inlet, and the suspended matter on the working surface of the filter assembly is enriched toward both sides of the center of the filter assembly under the guidance of the water flow.

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