A water quality detection system and detection method for filter pool

Abstract

The present application relates to a water quality detection system and detection method for a filter tank, the detection system includes: a sampling unit, a sampling unit, a sample retention unit, a control unit and a detection unit; the sampling unit includes sampling tubes arranged at different heights of the filter tank and a sampling electric valve connected to the sampling tube; the sampling unit includes a sampling pump and a sampling bottle, the sampling pump is connected to the sampling unit through a pipeline, a sampling tube is connected between the sampling bottle and the sampling pump, and a sampling electric valve is arranged on the sampling tube; the sample retention unit includes a dosing pump, the dosing pump, the sampling pump, the sampling electric valve, the sampling electric valve and the detection unit are electrically connected to the control system respectively. According to the process requirements, it can realize timed sampling and measurement at different depths or separate sampling or mixed sampling and measurement at different time periods at the same depth, and can be used for system analysis of the actual operation effect of the filter tank according to the detection results.

Description

Technical Field

[0001] The present application relates to the field of water quality sampling equipment, and in particular, to a water quality detection system and detection method for a filter tank. Background Art

[0002] In the existing sampling, it is generally carried out without human intervention, any external force or interference from other components. Especially for water samples in the filter tank, water quality at different depths can be sampled, but it does not have the automatic control function of timing and quantity. At the same time, most of the existing water quality samplers do not have the function of sampling at different depths.

[0003] In the online sampling and analysis of water samples in the filter, since the filter involves changes in two dimensions, time and filter layer, during operation, the current automatic sampling equipment can only obtain effluent water samples with a single sampling point and is unable to make judgments in both time and filter layer height. Summary of the invention

[0004] The purpose of this application is to provide a water quality detection system and detection method for a filter tank, which can realize timed sampling and testing at different depths or separate sampling or mixed sampling and testing at the same depth in different time periods according to process requirements, and can be used for systematic analysis of the actual operating effect of the filter tank based on the detection results.

[0005] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a water quality detection system for a filter tank, comprising: a sampling unit, a sampling unit, a sample retention unit, a control unit and a detection unit;

[0006] The sampling unit includes sampling pipes arranged at different heights of the filter tank and sampling electric valves connected to the sampling pipes;

[0007] The sampling unit comprises a sampling pump and a sampling bottle, the sampling pump is connected to the sampling unit through a pipeline, a sampling tube is connected between the sampling bottle and the sampling pump, and a sampling electric valve is arranged on the sampling tube;

[0008] The sample retention unit comprises a dosing pump, and the dosing pump, the sampling pump, the sampling electric valve, the sampling electric valve and the detection unit are electrically connected to the control system respectively.

[0009] In an optional embodiment, the sampling pipe includes a sampling main pipe and a sampling branch pipe, the sampling main pipe is connected to the sampling pump, the sampling branch pipes are arranged in rows in the filter tank, each of the sampling branch pipes is provided with a sampling inlet pipe of different heights, and the sampling main pipe is provided with a filter.

[0010] In an optional embodiment, the sampling electric valve corresponds to the sampling injection tube one by one, and the sampling injection tubes are at the same height on different sampling branch pipes.

[0011] In an optional embodiment, the sampling bottles include a plurality of sampling bottles corresponding one to one with the sampling inlet tubes, the sampling tubes include a sampling main tube connected to the sampling pump and a sampling branch tube connected between each of the sampling bottles and the sampling main tube, and the sampling electric valve is arranged on the sampling branch tube.

[0012] In an optional embodiment, the sampling bottle and the sampling pump are arranged in a sampling box, an overflow tank is provided on the sampling box, an emptying branch pipe for emptying and rinsing the sampling pipeline is provided between the sampling main pipe and the overflow tank, an emptying electric valve is provided on the sampling main pipe, and the emptying electric valve is electrically connected to the control system.

[0013] In an optional embodiment, each of the sampling bottles is connected to an overflow pipe, the overflow pipe is arranged between the sampling bottle and the overflow tank, and an overflow one-way valve is arranged on the overflow pipe.

[0014] In an optional embodiment, an overflow port is provided on the side of the overflow trough, and the height of the overflow port is the same as the height of the tube mouth of the overflow tube located at the sampling bottle.

[0015] In an optional embodiment, a dosing tank is further provided in the sampling box, the dosing tank is connected to the dosing pump through a dosing pipe, a dosing branch pipe is provided between the dosing pump and the sampling bottle, and a dosing check valve is connected to the dosing branch pipe.

[0016] In an optional embodiment, a filter material layer is provided in the filter tank, and the sampling inlet tube on each of the sampling branches is respectively arranged at the filter material bottom layer, filter material middle layer, filter material surface layer and water surface layer.

[0017] In a second aspect, the present invention provides a water quality detection method for a filter tank, which is performed by a detection system according to any one of the aforementioned embodiments, comprising the following steps:

[0018] Control the sampling pump, sampling electric valve and sampling electric valve to take samples;

[0019] Add medicine into the sampling bottle through the dosing pump;

[0020] Test the water quality after adding the medicine.

[0021] Through the detection system of the present invention, the collection, sampling, retention and detection of water samples at different collection points in the filter tank can be achieved according to process requirements.

[0022] The test results are used to systematically analyze the actual operating effects of the filter project, better diagnose the project situation, save a lot of manpower and improve work efficiency.

[0023] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the detection system in this application;

[0026] Figure 2 This is a control flow chart of the detection system in this application;

[0027] Figure 3 It is a schematic diagram of the arrangement structure of the sampling unit in the filter tank;

[0028] Figure 4 It is a schematic diagram of the plan layout structure of the sampling unit;

[0029] Figure 5 This is a schematic diagram of the plan layout structure of the sample retention unit;

[0030] Figure 6 It is a schematic diagram of the side structure of the sample retention unit.

[0031] icon:

[0032] 10- filter tank; 11- filter material layer;

[0033] 20-sampling main pipe; 21-sampling branch pipe; 22-sampling inlet pipe; 23-sampling electric valve;

[0034] 30-sampling pump; 31-sampling main pipe; 32-sampling branch pipe; 33-sampling bottle; 34-sampling electric valve;

[0035] 40 - filter;

[0036] 50-overflow trough; 51-overflow port; 52-overflow pipe; 53-drain branch pipe; 54-drain electric valve; 55-overflow check valve;

[0037] 60-dosing tank; 61-dosing pump; 62-dosing pipe; 63-dosing branch pipe; 64-dosing one-way valve. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] See also Figure 1 The detection system provided by the present invention is used to detect the water quality of the filter tank. It mainly includes a sampling unit, a sampling unit, a sample retention unit, a control unit and a detection unit.

[0042] Combination Figure 3 The sampling unit is used to collect water quality in the filter tank 10, including sampling tubes arranged at different heights of the filter tank 10, which can collect water samples at different filter layer heights and the surface layer of the water in the filter tank 10. Specifically, the sampling tube includes a sampling main pipe 20 and a sampling branch pipe 21. The sampling main pipe 20 is connected to the sampling pump 30 in the sampling unit, and a filter 40 for filtering the water sample is arranged on the sampling main pipe 20 to prevent the filter material from affecting the operation of the sampling pump 30.

[0043] The sampling branch pipes 21 are arranged in a row inside the filter tank 10 . Each sampling branch pipe 21 is vertically arranged in the filter tank 10 . Sampling inlet pipes 22 with different heights are arranged in the vertical direction of the sampling branch pipes 21 .

[0044] Furthermore, a filter material layer 11 is provided in the middle and lower part of the filter tank 10, and the sampling inlet tubes 22 on the sampling branch tubes 21 are respectively provided at the bottom layer of the filter material, the middle layer of the filter material, the surface layer of the filter material and the surface layer of the water surface, corresponding to the sampling points at different positions in the filter tank 10. A sampling electric valve 23 is connected to each sampling inlet tube 22, and each sampling electric valve 23 is electrically connected to the control system to control different sampling orders through the control system.

[0045] There is a one-to-one correspondence between the sampling electric valve 23 and the sampling injection tube 22, and the sampling injection tube 22 is at the same height on different sampling branches 21. Through this setting method, combined with the electrical connection between the control system and the sampling electric valve 23, it is possible to form timed sampling and testing of different filter layer heights at the same point of the filter tank 10, that is, the sampling branch 21, according to process requirements; timed sampling and testing of different filter layer heights at different points in the same batch; separate sampling or mixed sampling and testing at the same point at the same filter layer height in different time periods; separate sampling and testing at different points at the same filter layer height in different time periods, thereby increasing the flexibility of collecting water samples inside the filter tank 10.

[0046] See also Figure 4 , and combined with Figure 5 The sampling unit includes a sampling pump 30 and a sampling bottle 33. The sampling pump 30 is connected to the sampling main pipe 20, and is used to transport the water sample in the filter tank 10 into the sampling bottle 33 through the sampling pump 30. The sampling pump 30 is connected to the control system, which can control the start and stop and the running time of the sampling pump 30, so as to control the sampling amount of the water sample by controlling the running time.

[0047] Each sampling bottle 33 corresponds to each sampling and inlet tube 22, that is, the sampling bottle 33 and the water sample collection point are in a one-to-one correspondence. The sampling tube includes a sampling main tube 31 connected to the sampling pump 30, and a sampling branch tube 32 connected between each sampling bottle 33 and the sampling main tube 31. Each sampling bottle 33 is provided with a sampling branch tube 32, and each sampling branch tube 32 is provided with a sampling electric valve 34. The sampling electric valves 34 are electrically connected to the control system. Combined with the electrical connection between the sampling electric valve 23 and the control system, the corresponding sampling electric valve 23 and the sampling electric valve 34 can be opened at the same time, and the water sample at the sampling point is transported into the sampling bottle 33 through the sampling pump 30.

[0048] Preferably, the sampling unit includes a sampling box, and the sampling bottle 33 and the sampling pump 30 are both arranged in the sampling box. In order to avoid the residual water sample in the sampling tube from affecting the water quality during the connection process of the front and rear sampling, the sampling box is provided with an overflow trough 50 for collecting, rinsing and emptying the liquid in the sampling tube, and an emptying branch pipe 53 for emptying and rinsing the sampling pipeline is provided between the sampling main pipe 31 and the overflow trough 50. The sampling main pipe 31 is provided with an emptying electric valve 54, and the emptying electric valve 54 is electrically connected to the control system, so that before the water sample enters the sampling bottle 33, the control system can control the sampling electric valve 34 to close and the emptying electric valve 54 to open, so as to empty and clear the residual water sample in the sampling main pipe 31 to the overflow trough 50.

[0049] Each sampling bottle 33 is connected to an overflow pipe 52, which is arranged between the sampling bottle 33 and the overflow tank 50. After the sampling bottle 33 is filled with water sample, the water sample in the sampling bottle 33 can be introduced into the overflow tank 50 through the overflow pipe 52 to prevent the water sample from overflowing in the sampling water tank. In order to prevent the water in the overflow tank 50 from flowing back into the sampling bottle 33, an overflow check valve 55 is arranged on each overflow pipe 52 to prevent the water sample from flowing back into the sampling bottle 33, thereby ensuring the authenticity of the water quality in the sampling bottle 33.

[0050] An overflow port 51 is provided on the side of the overflow tank 50, which is mainly used to discharge the water in the overflow tank 50 to the outside. At the same time, in order to further form a water seal effect to prevent external air from entering the sampling bottle 33 and changing the physical and chemical properties of the water, the height of the overflow port 51 is the same as the height of the overflow pipe 52 at the mouth of the sampling bottle 33. The water sample in the sampling bottle 33 can be effectively protected in the form of a water seal.

[0051] Combination Figure 6 The sample retention unit specifically includes a dosing tank 60, a dosing pump 61, and a dosing pipe 62 connected between the dosing tank 60 and the dosing pump 61. A dosing branch pipe 63 is provided between the dosing pump 61 and the sampling bottle 33. Each dosing branch pipe 63 corresponds to each sampling bottle 33. The dosing branch pipe 63 is connected to a dosing check valve 64 to prevent the water sample from overflowing from the sampling bottle 33. The dosing tank 60 is equipped with a water sample fixative to ensure that the water quality does not undergo chemical changes.

[0052] The control system includes a time switch, which is connected to the pump and the electric valves in different units. It can control each link according to the process needs, so as to meet the diverse sampling requirements of different sampling conditions such as single sampling or mixed sampling, sampling at special times, and continuous sampling before and after backwashing.

[0053] The present invention also provides a water quality detection method for a filter system, which is performed by the detection system for the filter 10, and includes the following steps:

[0054] The sampling pump 30, the sampling electric valve 23 and the sampling electric valve 34 are controlled to perform sampling; the dosing pump 61 is used to add medicine into the sampling bottle 33; and the water quality after the addition of the medicine is tested.

[0055] The following describes the sampling points at different locations in the filter tank 10 and the sampling process.

[0056] See also Figure 3 , a total of 5 sampling branches 21 are set in the filter tank, namely points 1, 2, 3, 4, and 5. The sampling branch 21 at each point is set with 4 sampling points at different filter layer heights in the longitudinal direction, namely the filter material bottom layer (A), the filter material middle layer (B), the filter material surface layer (C), and the water surface layer above the filter material layer 11 (D).

[0057] The points of different filter layer heights at point 1 are represented as A1, B1, C1, and D1, and the points of different filter layer heights at point 2 are represented as A2, B2, C2, and D2, and so on. Each sampling point corresponds to a sampling bottle 33, and the sampling bottles 33 are arranged in four rows, namely row A, row B, row C, and row D. Each row is provided with 5 sampling bottles 33. The sampling bottles 33 in row A are numbered A1, A2, A3, A4, and A5 from right to left, and the sampling bottles 33 in row B are numbered B1, B2, B3, B4, and B5 from right to left, and so on. The sampling bottle 33 numbers correspond to the collection point numbers one by one. When setting, if sampling is taken at different time points at the A3 collection point, A3, B3, C3, and D3 can be pumped in respectively.

[0058] The control system in the present invention can perform sampling settings from two dimensions: time and filter layer height, and has a water quality detection function. The actual operation effect of the filter tank 10 project is analyzed through the monitoring data system to better diagnose the project situation.

[0059] In one specific embodiment, sampling branches 21 can be set at different points of the filter tank 10, and the number of sampling branches 21 can be adjusted according to the on-site conditions. Each sampling branch 21 is provided with sampling inlet tubes 22 at different heights, which are respectively A, B, C, and D, a total of four collection points at the filter layer height. The number of collection points can be adjusted according to the actual situation. The sampling pump 30 and the sampling electric valve 23 at the collection points at different filter layer heights are controlled by the control system to set the time. The specific method is as follows: Figure 2 First, set up the sampling program in the control system, such as collecting water samples from different points (from 1 to 5) on the bottom layer of the filter material (at A).

[0060] First, set the first sampling time point (before nitrogen expulsion or backwashing of the filter tank 10), set the opening time of the sampling pump 30 and the valve at A1 and the opening time of the emptying electric valve 54, and set the time required for emptying and rinsing the sampling tube. Then set the closing time point of the emptying electric valve 54, and at the same time open the sampling electric valve 34 at the inlet of the corresponding sampling bottle 33 (A1), set the time required for sampling, and after the sampling is completed, set the closing of the A1 collection port, the sampling pump 30 and the sampling electric valve 34 at the inlet of A1 at the same time, set the addition time of the water sample fixative, that is, set the opening and closing time points of the dosing pump 61 and the corresponding dosing check valve 64. Finally, the control system controls the detection unit to perform water quality detection, and then sets the sampling operation at the collection point 2, and the setting procedure is the same. By analogy, the collection, sampling, water sample fixation and detection procedures of water samples at different points (from 1 to 5) at the bottom layer of the filter material (at A) at the first time point can be completed.

[0061] The specific path of the water sample is as follows: the water samples are collected from the collection points A1-A5 in sequence, first filtered by the filter 40 arranged on the sampling main pipe 20, and the filtered water samples enter the sampling unit.

[0062] Before each formal sampling, the control system first sets the emptying electric valve 54 to work, and the water sample enters the emptying branch pipe 53 from the sampling main pipe 31. The emptying electric valve 54 provided on the emptying branch pipe 53 controls the discharge time, and finally the rinsed water sample is discharged into the overflow tank 50, and finally discharged from the sampling unit through the overflow port 51. In this way, the water sample retained last time can be emptied and the pipeline can be rinsed.

[0063] After rinsing, the control system controls the draining electric valve 54 to close, and the sampling electric valve 34 provided at the inlet of the sampling bottle 33 to open, and the water sample enters the sampling branch pipe 32 from the sampling main pipe 31, and enters the sampling bottle 33-A5 through the sampling electric valve 34. The detection unit performs online detection of the water quality, that is, completes the collection and detection of water samples at different points of the same filter layer height at a time point. The water sample can be temporarily stored according to the process requirements, and the control system can regularly set the working state of the dosing pump 61 in the sample retention unit, and pump the water sample fixative into the corresponding time and the corresponding sampling bottle 33 to ensure that the water quality does not undergo chemical changes. Each time after disassembly and before sampling, the sampling bottle 33 needs to be filled with nitrogen, and the outlet of the sampling bottle 33 needs to be sealed through the one-way valve set at the overflow pipe 52 of the sampling bottle 33. A normally closed electric valve can be set at the water inlet branch of the sampling bottle 33 to seal the water inlet of the sampling bottle 33, thereby achieving sealing throughout the entire process of collection, sampling and testing to prevent changes in water quality.

[0064] The second sampling time point can be set 2 hours after nitrogen expulsion or backwashing, and the program can be set to repeat the same steps. And so on, the Nth sampling time point can be set.

[0065] By setting the timing program of the time-controlled switch in the control system and controlling the timing switch of the sampling pump 30 and the electric valve, the following operations can be achieved:

[0066] (1) Different points on the same filter layer are sampled separately at regular intervals (e.g., sampling every 2 hours before and after backwashing) (i.e., water samples at different points are pumped into different sampling bottles 33 through the sampling unit and the sampling unit).

[0067] (2) Separate sampling at the same point on the same filter layer at different time points (sampling at intervals at a fixed point, water samples at different time points are pumped into different sampling bottles 33 through the sampling unit and the sampling unit, such as the first time point of point A3 is pumped into the A3 sampling bottle 33, the second time point is set to be pumped into the B3 sampling bottle 33, the third time point is set to be pumped into the C3 sampling bottle 33...), or 24-hour mixed sampling (a certain amount of water sample is taken from a fixed point every few hours within 24 hours and put into the same sampling bottle 33).

[0068] (3) Timed sampling at different filter layer heights at the same point (e.g. A1-D1, set at the same time point, samples are collected from A1, B1, C1, D1 in sequence through the sampling unit, filter 40, sampling main pipe 31, sampling branch pipe 32, and finally pumped into the corresponding sampling bottle 33-D1; the time interval is 2 hours from the last sampling, and the same sampling operation is repeated, and so on. The required sampling time point and sampling frequency can be set according to the process requirements).

[0069] Or sampling at different filter layer heights at different points (set a certain time point, collect water samples (A1-D1) at different filter layer heights at the first point of the filter tank 10, collect water samples (A2-D2) at different filter layer heights at the second point, and so on, the water samples collected from different filter layers at the first point flow into sampling bottles A1-D1 respectively, the water samples collected from different filter layers at the second point flow into sampling bottles A2-D2 respectively...; the time interval from the last sampling is 2 hours, and the same sampling operation is repeated, and so on, the required sampling time point and number of times can be set according to the process requirements.

[0070] Through the water quality detection system and detection method of the present invention, water samples in the filter tank 10 can be collected, sampled, stabilized and detected more flexibly, and the changing factors in the two dimensions of time and filter layer height are fully considered. The detection results can be used to systematically analyze the actual operating effect of the filter tank 10 project, better diagnose the project situation, save a lot of manpower, and improve work efficiency.

[0071] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0072] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A water quality detection system for a filter tank, characterized in that: include: Sampling unit, sampling unit, sample retention unit, control unit and detection unit; The sampling unit includes sampling pipes arranged at different heights of the filter tank and sampling electric valves connected to the sampling pipes; The sampling unit comprises a sampling pump and a sampling bottle, the sampling pump is connected to the sampling unit through a pipeline, a sampling tube is connected between the sampling bottle and the sampling pump, and a sampling electric valve is arranged on the sampling tube; The sample retention unit comprises a dosing pump, and the dosing pump, the sampling pump, the sampling electric valve, the sampling electric valve and the detection unit are electrically connected to a control system respectively; The sampling pipe includes a sampling main pipe and a sampling branch pipe. The sampling main pipe is connected to the sampling pump. The sampling branch pipes are arranged in rows inside the filter tank. Each sampling branch pipe is vertically arranged in the filter tank. Sampling inlet pipes of different heights are arranged in the vertical direction of the sampling branch pipe. A filter is arranged on the sampling main pipe.

2. The detection system according to claim 1, characterized in that: The sampling electric valves correspond to the sampling injection tubes one by one, and the sampling injection tubes are at the same height on different sampling branch pipes.

3. The detection system according to claim 1, characterized in that: The sampling bottles include a plurality of sampling bottles corresponding to the sampling injection tubes one by one. The sampling tubes include a sampling main tube connected to the sampling pump and a sampling branch tube connected between each sampling bottle and the sampling main tube. The sampling electric valve is arranged on the sampling branch tube.

4. The detection system according to claim 3, characterized in that: The sampling bottle and the sampling pump are arranged in a sampling box, an overflow tank is arranged on the sampling box, an emptying branch pipe for emptying and rinsing the sampling pipeline is arranged between the sampling main pipe and the overflow tank, an emptying electric valve is arranged on the sampling main pipe, and the emptying electric valve is electrically connected to the control system.

5. The detection system according to claim 4, characterized in that: Each of the sampling bottles is connected with an overflow pipe, the overflow pipe is arranged between the sampling bottle and the overflow tank, and an overflow one-way valve is arranged on the overflow pipe.

6. The detection system according to claim 5, characterized in that: An overflow port is arranged on the side of the overflow trough, and the height of the overflow port is the same as the height of the tube mouth of the overflow tube located at the sampling bottle.

7. The detection system according to claim 4, characterized in that: The sampling box is also provided with a dosing tank, the dosing tank is connected to the dosing pump through a dosing pipe, a dosing branch pipe is provided between the dosing pump and the sampling bottle, and a dosing one-way valve is connected to the dosing branch pipe.

8. The detection system according to claim 4, characterized in that: A filter material layer is arranged in the filter tank, and the sampling inlet tube on each sampling branch pipe is arranged at the bottom layer of the filter material, the middle layer of the filter material, the surface layer of the filter material and the surface layer of the water surface respectively.

9. A method for detecting water quality in a filter tank, performed by the detection system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Control the sampling pump, sampling electric valve and sampling electric valve to take samples; Add medicine into the sampling bottle through the dosing pump; Test the water quality after adding the medicine.

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