Multi-sample collection and detection device for water quality analysis

Abstract

The invention discloses a multi-sample collecting and detecting device for water quality analysis, and relates to the technical field of water quality sampling devices.The multi-sample collecting and detecting device comprises a second collecting barrel, a third collecting barrel and an adjusting assembly, and the second collecting barrel is connected with the third collecting barrel through the adjusting assembly fixedly installed at the top of the inner wall; the adjusting assembly comprises a first motor, a lead screw and a limiting block. By installing the adjusting assembly, the function of adjusting the detection depth is achieved, meanwhile, the surface of the sampling device can be cleaned, the problems that a traditional water quality sampling detection device cannot adjust the detection depth and is inaccurate in sampling due to surface pollution are solved, and the sampling precision and accuracy are improved.

Description

Technical Field

[0001] The invention relates to the technical field of water quality sampling devices, and in particular to a multi-sample collection and detection device for water quality analysis. Background Art

[0002] Existing water quality monitoring devices are often of fixed length and cannot sample and analyze deep water bodies. At the same time, floating algae and microorganisms will attach to the surface of the device when it is immersed in water for a long time, which will hinder sampling and make it impossible to effectively sample and analyze deep water bodies. The sampling depth of water bodies is limited and the sampling volume is insufficient, resulting in inaccurate sampling, testing and analysis data for water quality, which cannot accurately reflect the health parameters of water quality.

[0003] Patent CN116481859B discloses a water quality sampling and detection device and detection method. The above patent improves the efficiency of collecting water samples at multiple water levels and saves the time required for water sample detection.

[0004] The collection box disclosed in the above patent can collect different water samples and store them separately when moving, but there is still room for improvement in adjusting the sampling depth of the water body.

[0005] To this end, the present application proposes a multi-sample collection and detection device for water quality analysis that can adjust the detection depth. Summary of the invention

[0006] The purpose of the present invention is to provide a multi-sample collection and detection device for water quality analysis to solve the technical problem raised in the above background technology that deep water bodies cannot be effectively sampled and analyzed, resulting in inaccurate water quality sampling, detection and analysis data.

[0007] To achieve the above object, the present invention provides the following technical solution: a multi-sample collection and detection device for water quality analysis, comprising a second collection tube, a third collection tube and an adjustment component, wherein the second collection tube is connected to the third collection tube via the adjustment component fixedly installed on the top of the inner wall; The adjustment assembly comprises: a first motor, a screw rod and a limit block; A first motor is fixedly installed on the bottom of the inner wall of the second collecting tube, a first rotating shaft is fixedly installed on the bottom of the outer wall of the first motor, a screw is fixedly installed on the bottom of the outer wall of the first rotating shaft, the outer wall of the screw is threadedly sleeved with the inner tube of the third collecting tube, a sliding groove is provided on the side of the outer wall of the third collecting tube, a limit block is fixedly installed on the side of the inner wall of the second collecting tube, and the limit block is clamped in the sliding groove, a cleaning brush ring is fixedly installed on the inner wall of the second collecting tube, a sampling hole is provided on the side of the outer wall of the third collecting tube, a fixed head is rotatably installed on the bottom of the outer wall of the third collecting tube, and a third sample detector is fixedly installed in the fixed head.

[0008] Preferably, an opening and closing component is movably installed on the inner wall of the second collecting tube, and the opening and closing component is used to selectively control the sampling process and the sampling amount; The opening and closing assembly includes: a second motor, a rotating cover and a sampling nozzle; A second motor is fixedly installed on the top of the inner wall of the second collecting tube, a second rotating shaft is fixedly installed on the bottom of the outer wall of the second motor, a rotating cover is fixedly installed on the bottom of the outer wall of the second rotating shaft, a sampling nozzle is fixedly installed on the side of the outer wall of the rotating cover, a water inlet is fixedly opened on the side of the outer wall of the second collecting tube, and a second sample detector is fixedly installed on the bottom of the inner wall of the rotating cover.

[0009] Preferably, the first collecting tube is fixedly installed on the top of the outer wall of the second collecting tube, a wire filter is fixedly installed on the outer wall of the first collecting tube, a plurality of leakage holes are opened on the outer wall of the first collecting tube, a water collecting box is fixedly installed on the bottom of the inner wall of the first collecting tube, a water suction pipe is fixedly installed on the side of the outer wall of the water collecting box, and a first sample detector is fixedly installed on the bottom of the inner wall of the water collecting box.

[0010] Preferably, a floating platform is fixedly installed on the top of the outer wall of the first collection tube, a water quality analysis processor is fixedly installed on the bottom of the inner wall of the floating platform, and the water quality analysis processor is communicatively connected with the first sample detector, the second sample detector and the third sample detector through a wireless communication module, and a floating block is fixedly installed on the bottom of the outer wall of the floating platform.

[0011] Preferably, a high-pressure pump is fixedly installed on the top of the outer wall of the water collection box, and the input port of the high-pressure pump is connected to the water pumping pipe, a high-pressure pipeline is fixedly installed on the output port of the top of the outer wall of the high-pressure pump, and a power component is fixedly installed on the top of the outer wall of the high-pressure pipeline.

[0012] Preferably, the power assembly includes: a water storage box, a circulating water pump and a butterfly valve; A water storage box is fixedly installed at the bottom of the inner wall of the floating platform, and the water storage box is connected to the high-pressure pipeline. A circulating water pump is fixedly installed at the bottom of the inner wall of the water storage box, a four-way seat is fixedly installed on the outer wall of the circulating water pump, a butterfly valve is fixedly installed on the side of the outer wall of the four-way seat, and the butterfly valve is opened and closed by a wireless micromotor program.

[0013] Preferably, a water spray trough is opened on the side of the inner wall of the floating platform, a water spray seat is fixedly installed in the water spray trough, a nozzle is fixedly installed on the front of the outer wall of the water spray seat, a water supply pipe is fixedly installed on the back of the outer wall of the water supply pipe, a connecting pipe is fixedly installed on the back of the outer wall of the water supply pipe, and the connecting pipe is connected to the butterfly valve.

[0014] Preferably, a battery is fixedly installed on the top of the inner wall of the floating platform, and the battery is connected to each electrical component in the multi-sample collection and detection device through a power line for power supply. A sound and light alarm is fixedly installed on the top of the outer wall of the floating platform, and the sound and light alarm is connected to the water quality analysis processor through a data signal line, and an RGB diode is installed in the sound and light alarm.

[0015] Preferably, the water quality analysis processor is preset with a water quality data analysis and detection program, including pH analysis and detection, dissolved oxygen analysis and detection, conductivity analysis and detection, turbidity analysis and detection, and heavy metal ion analysis and detection programs.

[0016] Preferably, the first sample detector, the second sample detector and the third sample detector are all equipped with a microfluidic chip, wherein a plurality of microchannels are provided in the chip, and sample diversion, mixing and detection are performed according to a preset program.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the function of adjusting the detection depth by installing an adjustment component, and can clean the surface of the sampling device at the same time, solving the problem that the traditional water quality sampling and detection device cannot adjust the detection depth and the surface pollution sampling is inaccurate, and improves the sampling precision and accuracy; 2. The present invention realizes the control and regulation function of the sampling flow rate by installing an opening and closing component, solves the problem of excessive sampling affecting the accuracy of traditional sampling devices, improves the sampling accuracy, and meets the requirements of different sampling volumes; 3. The present invention realizes the mobile function of the sampling device by installing a power component, and can increase the dissolved oxygen in the water body, solving the problem that the traditional sampling device cannot meet the sampling needs of different waters, saving manpower to move the device in the water, and improving the safety of sampling; 4. The present invention realizes the alarm prompt function for different water quality conditions by installing an audible and visual alarm, and at the same time reminds the working status of the device, thereby improving the accuracy and intelligence level of the sampling device and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a front structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the structure of the regulating component of the present invention; Figure 4 It is a schematic diagram of the structure of the opening and closing assembly of the present invention; Figure 5 It is a schematic structural diagram of the first collection tube of the present invention; Figure 6 It is a schematic diagram of the structure of the power assembly of the present invention; Figure 7 It is a schematic diagram of the floating platform structure of the present invention; Figure 8 It is a structural schematic diagram of the sound and light alarm of the present invention.

[0019] In the figure: 1, floating platform; 2, first collection tube; 3, second collection tube; 4, third collection tube; 5, fixed head; 6, sound and light alarm; 7, floating block; 8, water quality analysis processor; 9, first motor; 10, first rotating shaft; 11, screw rod; 12, cleaning brush ring; 13, limit block; 14, sampling hole; 15, inner tube; 16, sliding groove; 17, third sample detector; 18, second motor; 19, second rotating shaft; 20, rotating cover; 21, sampling nozzle; 22, water inlet; 23, second sample detector; 24, wire filter; 25, water collection box; 26, water suction pipe; 27, high-pressure pump; 28, high-pressure pipeline; 29, first sample detector; 30, water storage box; 31, water spray seat; 32, nozzle; 33, four-way seat; 34, circulating water pump; 35, butterfly valve; 36, connecting pipe; 37, water delivery pipe; 38, battery. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1 , Figure 2 and Figure 3, an embodiment provided by the present invention: a multi-sample collection and detection device for water quality analysis, comprising a second collection tube 3, a third collection tube 4 and an adjustment component, wherein the second collection tube 3 is connected to the third collection tube 4 through the adjustment component fixedly installed on the top of the inner wall; The adjustment assembly includes: a first motor 9, a screw rod 11 and a limit block 13; A first motor 9 is fixedly installed at the bottom of the inner wall of the second collecting tube 3, a first rotating shaft 10 is fixedly installed at the bottom of the outer wall of the first motor 9, a screw rod 11 is fixedly installed at the bottom of the outer wall of the first rotating shaft 10, an inner tube 15 of the third collecting tube 4 is threadedly sleeved on the outer wall of the screw rod 11, a sliding groove 16 is provided on the side of the outer wall of the third collecting tube 4, a limiting block 13 is fixedly installed on the side of the inner wall of the second collecting tube 3, and the limiting block 13 is clamped in the sliding groove 16, a cleaning brush ring 12 is fixedly installed on the inner wall of the second collecting tube 3, a sampling hole 14 is provided on the side of the outer wall of the third collecting tube 4, a fixed head 5 is rotatably installed at the bottom of the outer wall of the third collecting tube 4, and a third sample detector 17 is fixedly installed in the fixed head 5; Further, the first motor 9 is started, the first motor 9 drives the first rotating shaft 10 to rotate, the first rotating shaft 10 drives the screw rod 11 to rotate, the rotating screw rod 11 drives the inner tube 15 to move up and down through the threaded engagement, and at the same time the limit block 13 performs a follow-up rotation limiting effect on the inner tube 15 through the sliding groove 16 to prevent the inner tube 15 from rotating with the screw rod 11, resulting in the inner tube 15 being unable to drive the third collecting tube 4 to rise and fall, and the inner tube 15 drives the third collecting tube 4 to move up and down. During the up and down movement of the third collecting tube 4, the fixedly installed cleaning brush ring 12 cleans the outer surface of the third collecting tube 4, scrapes off the floating algae and microbial communities on the surface of the third collecting tube 4 that have been immersed in water for a long time, and prevents impurities from contaminating the sampling opening on the surface of the third collecting tube 4. The hole 14 is blocked, making it impossible to sample and detect deep water bodies. At the same time, the exposure depth of the third collecting tube 4 can be adjusted through the adjustment component, and the water quality at different depths can be sampled, detected and analyzed, meeting the needs of deep water sampling and improving the accuracy of water sampling, detection and analysis; the water body enters the inner cavity of the fixed head 5 in the third collecting tube 4 from the sampling hole 14, and the third sample detector 17 in the fixed head 5 performs multi-index detection and analysis on the sampled water body, and stores and transmits the sampling, detection and analysis results. The fixed head 5 is installed at the bottom of the third collecting tube 4 by threaded rotation. When the sampling result is abnormal, the third sample detector 17 can be inspected and replaced by quickly rotating and disassembling the fixed head 5, thereby improving work efficiency and water quality sampling efficiency.

[0024] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7, an embodiment provided by the present invention: a multi-sample collection and detection device for water quality analysis, wherein an opening and closing component is movably installed on the inner wall of the second collection tube 3, and the opening and closing component is used to selectively control the sampling process and the sampling amount; The opening and closing assembly includes: a second motor 18, a rotating cover 20 and a sampling nozzle 21; A second motor 18 is fixedly mounted on the top of the inner wall of the second collection tube 3, a second rotating shaft 19 is fixedly mounted on the bottom of the outer wall of the second motor 18, a rotating cover 20 is fixedly mounted on the bottom of the outer wall of the second rotating shaft 19, a sampling nozzle 21 is fixedly mounted on the side of the outer wall of the rotating cover 20, a water inlet 22 is fixedly opened on the side of the outer wall of the second collection tube 3, and a second sample detector 23 is fixedly mounted on the bottom of the inner wall of the rotating cover 20; The first collecting tube 2 is fixedly mounted on the top of the outer wall of the second collecting tube 3, a wire filter 24 is fixedly mounted on the outer wall of the first collecting tube 2, a plurality of leakage holes are opened on the outer wall of the first collecting tube 2, a water collecting box 25 is fixedly mounted on the bottom of the inner wall of the first collecting tube 2, a water extraction pipe 26 is fixedly mounted on the side of the outer wall of the water collecting box 25, and a first sample detector 29 is fixedly mounted on the bottom of the inner wall of the water collecting box 25; A high-pressure pump 27 is fixedly installed on the top of the outer wall of the water collecting box 25, and the input port of the high-pressure pump 27 is connected to the water pumping pipe 26. A high-pressure pipeline 28 is fixedly installed on the output port of the top of the outer wall of the high-pressure pump 27, and a power component is fixedly installed on the top of the outer wall of the high-pressure pipeline 28; The power assembly includes: a water storage box 30, a circulating water pump 34 and a butterfly valve 35; A water storage box 30 is fixedly installed at the bottom of the inner wall of the floating platform 1, and the water storage box 30 is connected to the high-pressure pipe 28. A circulating water pump 34 is fixedly installed at the bottom of the inner wall of the water storage box 30. A four-way seat 33 is fixedly installed on the outer wall of the circulating water pump 34. A butterfly valve 35 is fixedly installed on the side of the outer wall of the four-way seat 33, and the butterfly valve 35 is opened and closed by a wireless micromotor program control; A floating platform 1 is fixedly installed on the top of the outer wall of the first collection tube 2, a water quality analysis processor 8 is fixedly installed on the bottom of the inner wall of the floating platform 1, and the water quality analysis processor 8 is connected to the first sample detector 29, the second sample detector 23 and the third sample detector 17 through a wireless communication module, and a floating block 7 is fixedly installed on the bottom of the outer wall of the floating platform 1; Further, the second motor 18 is started, the second motor 18 drives the second rotating shaft 19 to rotate, the second rotating shaft 19 drives the rotating cover 20 to rotate, the rotating cover 20 drives the sampling nozzle 21 to coincide with the water inlet 22, and the water inlet flow rate and flow rate are controlled by adjusting the rotation angle, so that the sampling processing speed and the sampling amount can be selectively controlled, and the water flows into the rotating cover 20 through the coincidence of the water inlet 22 and the sampling nozzle 21. The sampled middle-layer water body is detected and analyzed by the second sample detector 23, and the detection results are stored and transmitted. A plurality of leakage holes are provided on the outer wall of the first collecting tube 2, and the upper layer of water enters the first collecting tube 2 through the leakage holes. The wire filter 24 plays a protective role to prevent water garbage and floating objects appearing on the upper layer of water and the water surface from entering the first collecting tube 2 and damaging the first collecting tube 2. The components in the collecting tube 2 are collected. At this time, the high-pressure pump 27 is started. The high-pressure pump 27 sucks the water in the first collecting tube 2 into the water collecting box 25 through the pumping pipe 26. The first sample detector 29 in the water collecting box 25 detects and analyzes the upper water body, and stores and transmits the detection results; the detection results of the first sample detector 29, the second sample detector 23 and the third sample detector 17 on the upper, middle and lower water bodies are all transmitted to the water quality analysis processor 8, and the detection and analysis program in the water quality analysis processor 8 performs multi-parameter analysis on the upper, middle and lower water bodies, and alarms in real time according to the water quality parameters to remind the management personnel to take improvement measures for the water body; the floating block 7 fixedly installed at the bottom of the outer wall of the floating platform 1 is used to provide support force to ensure that the detection device floats on the water surface, which is convenient for the management personnel to observe the water quality alarm situation.

[0025] See also Figure 5 , Figure 6 and Figure 7 , an embodiment of the present invention provides: a multi-sample collection and detection device for water quality analysis, wherein a high-pressure pump 27 is fixedly installed on the top of the outer wall of the water collecting box 25, and the input port of the high-pressure pump 27 is connected to the water pumping pipe 26, and a high-pressure pipeline 28 is fixedly installed on the output port of the top of the outer wall of the high-pressure pump 27, and a power component is fixedly installed on the top of the outer wall of the high-pressure pipeline 28; The power assembly includes: a water storage box 30, a circulating water pump 34 and a butterfly valve 35; A water storage box 30 is fixedly installed at the bottom of the inner wall of the floating platform 1, and the water storage box 30 is connected to the high-pressure pipe 28. A circulating water pump 34 is fixedly installed at the bottom of the inner wall of the water storage box 30. A four-way seat 33 is fixedly installed on the outer wall of the circulating water pump 34. A butterfly valve 35 is fixedly installed on the side of the outer wall of the four-way seat 33, and the butterfly valve 35 is opened and closed by a wireless micromotor program control; A water spraying groove is provided on the inner wall side of the floating platform 1, a water spraying seat 31 is fixedly installed in the water spraying groove, a nozzle 32 is fixedly installed on the front of the outer wall of the water spraying seat 31, a water delivery pipe 37 is fixedly installed on the back of the outer wall of the water spraying seat 31, a connecting pipe 36 is fixedly installed on the back of the outer wall of the water delivery pipe 37, and the connecting pipe 36 is connected to the butterfly valve 35; Furthermore, the high-pressure pump 27 pumps the water entering the water collecting box 25 into the water storage box 30 through the high-pressure pipe 28, and the circulating water pump 34 is started. The circulating water pump 34 pumps the water in the water storage box 30 through the four-way seat 33 to the butterfly valve 35, and the butterfly valve 35 is selectively opened by remote control. After the butterfly valve 35 is opened, the high-pressure water flow is output to the water supply pipe 37 through the connecting pipe 36, and then output from the water supply pipe 37 to the nozzle 32 installed on the water spray seat 31 for spraying. The sprayed water flow can form thrust, and combined with the selectively opened butterfly valve 35, it can drive the device to move and turn in the water, and conduct water quality detection and analysis of different waters without manual diving for position adjustment, thereby improving work efficiency and safety; at the same time, the water flow circulating into the device and the sprayed water flow can form an effective water cycle, and the sprayed water flow returns to the water body to increase the dissolved oxygen in the water, thereby improving the water quality.

[0026] See also Figure 2 and Figure 8 , an embodiment of the present invention: a multi-sample collection and detection device for water quality analysis, wherein a battery 38 is fixedly installed on the top of the inner wall of the floating platform 1, and the battery 38 is connected to each electrical component in the multi-sample collection and detection device through a power line for power supply, and an audible and visual alarm 6 is fixedly installed on the top of the outer wall of the floating platform 1, and the audible and visual alarm 6 is connected to a water quality analysis processor 8 through a data signal line, and an RGB diode is installed in the audible and visual alarm 6; Furthermore, the battery 38 is connected to each electrical component through a power line and supplies power to each electrical component, and the battery 38 is powered by a hydraulic rotating generator installed at the butterfly valve 35, so as to realize efficient energy utilization and improve the working efficiency and working time of the multi-sample collection and detection device. The sound and light alarm 6 is connected to the water quality analysis processor 8 through a data signal line. The RGB diode installed in the sound and light alarm 6 can emit red, green and blue lights. When the water quality analysis processor 8 integrates and analyzes the upper, middle and lower water layer data and detects that the current water quality is seriously polluted, eutrophicated or hypoxic, the water quality analysis processor 8 sends a serious pollution signal to the sound and light alarm 6. At this time, the sound and light alarm 6 emits a red light to warn the management personnel to deal with the water quality; when it is detected that the water quality parameters are within the standard threshold range, a green light is emitted; when it is detected that the water quality parameter data is insufficient, a blue light is emitted to prompt the management personnel to repair the equipment abnormality.

[0027] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 , an embodiment provided by the present invention: a multi-sample collection and detection device for water quality analysis, the water quality analysis processor 8 is preset with a water quality data analysis and detection program, including pH analysis and detection, dissolved oxygen analysis and detection, conductivity analysis and detection, turbidity analysis and detection and heavy metal ion analysis and detection programs; The first sample detector 29, the second sample detector 23 and the third sample detector 17 are all built with a microfluidic chip, which has multiple microchannels to perform sample diversion, mixing and detection according to a preset program; Furthermore, the water quality analysis processor 8 is preset with a water quality data analysis and detection program, including pH analysis and detection, dissolved oxygen analysis and detection, conductivity analysis and detection, turbidity analysis and detection, and heavy metal ion analysis and detection programs, which comprehensively analyze the water quality of the data collected by the first sample detector 29, the second sample detector 23 and the third sample detector 17. The first sample detector 29, the second sample detector 23 and the third sample detector 17 are all equipped with a built-in microfluidic chip, and the collected water samples are introduced into the built-in microfluidic chip through an intelligent valve. The chip is provided with multiple microchannels, and the sample is diverted, mixed and pre-treated according to the preset program, such as filtering out suspended particles, adding calibration reagents, etc., so as to improve the accuracy and response speed of subsequent detection.

[0028] Working principle: The detection depth is adjusted in real time by using the adjustment component. While adjusting the detection depth, the outer wall of the device is decontaminated and descaled to improve the sampling and analysis detection accuracy; Use the power component to move the device in the water to sample and detect different waters, expand the sampling range and detection accuracy, circulate the water body while moving, and increase the dissolved oxygen in the water; Finally, a comprehensive analysis is conducted based on the water quality test results of different water areas and water layers, and corresponding information feedback is issued through light prompts to remind managers to deal with the water quality.

[0029] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A multi-sample collection and detection device for water quality analysis, comprising a second collection tube (3), a third collection tube (4) and an adjustment component, characterized in that: The second collecting tube (3) is connected to the third collecting tube (4) via an adjustment component fixedly mounted on the top of the inner wall; The adjustment assembly comprises: a first motor (9), a screw rod (11) and a limit block (13); A first motor (9) is fixedly mounted on the bottom of the inner wall of the second collecting tube (3); a first rotating shaft (10) is fixedly mounted on the bottom of the outer wall of the first motor (9); a screw rod (11) is fixedly mounted on the bottom of the outer wall of the first rotating shaft (10); an inner tube (15) of a third collecting tube (4) is threadedly sleeved on the outer wall of the screw rod (11); a sliding groove (16) is provided on the side of the outer wall of the third collecting tube (4); a limit block (13) is fixedly mounted on the side of the inner wall of the second collecting tube (3), and the limit block (13) is clamped in the sliding groove (16); a cleaning brush ring (12) is fixedly mounted on the inner wall of the second collecting tube (3); a sampling hole (14) is provided on the side of the outer wall of the third collecting tube (4); a fixed head (5) is rotatably mounted on the bottom of the outer wall of the third collecting tube (4), and a third sample detector (17) is fixedly mounted in the fixed head (5).

2. A multi-sample collection and detection device for water quality analysis according to claim 1, characterized in that: An opening and closing component is movably mounted on the inner wall of the second collecting tube (3), and the opening and closing component is used to selectively control the sampling process and the sampling amount; The opening and closing assembly comprises: a second motor (18), a rotating cover (20) and a sampling nozzle (21); A second motor (18) is fixedly mounted on the top of the inner wall of the second collection tube (3); a second rotating shaft (19) is fixedly mounted on the bottom of the outer wall of the second motor (18); a rotating cover (20) is fixedly mounted on the bottom of the outer wall of the second rotating shaft (19); a sampling nozzle (21) is fixedly mounted on the side of the outer wall of the rotating cover (20); a water inlet (22) is fixedly opened on the side of the outer wall of the second collection tube (3); and a second sample detector (23) is fixedly mounted on the bottom of the inner wall of the rotating cover (20).

3. The multi-sample collection and detection device for water quality analysis according to claim 1, characterized in that: The first collecting tube (2) is fixedly mounted on the top of the outer wall of the second collecting tube (3), a wire filter (24) is fixedly mounted on the outer wall of the first collecting tube (2), a plurality of leakage holes are opened on the outer wall of the first collecting tube (2), a water collecting box (25) is fixedly mounted on the bottom of the inner wall of the first collecting tube (2), a water extraction pipe (26) is fixedly mounted on the side of the outer wall of the water collecting box (25), and a first sample detector (29) is fixedly mounted on the bottom of the inner wall of the water collecting box (25).

4. The multi-sample collection and detection device for water quality analysis according to claim 3, characterized in that: A floating platform (1) is fixedly mounted on the top of the outer wall of the first collection tube (2), a water quality analysis processor (8) is fixedly mounted on the bottom of the inner wall of the floating platform (1), and the water quality analysis processor (8) is communicatively connected with the first sample detector (29), the second sample detector (23) and the third sample detector (17) via a wireless communication module, and a floating block (7) is fixedly mounted on the bottom of the outer wall of the floating platform (1).

5. The multi-sample collection and detection device for water quality analysis according to claim 3, characterized in that: A high-pressure pump (27) is fixedly mounted on the top of the outer wall of the water collecting box (25), and the input port of the high-pressure pump (27) is in communication with the water extraction pipe (26). A high-pressure pipeline (28) is fixedly mounted on the output port of the top of the outer wall of the high-pressure pump (27), and a power assembly is fixedly mounted on the top of the outer wall of the high-pressure pipeline (28).

6. The multi-sample collection and detection device for water quality analysis according to claim 5, characterized in that: The power assembly comprises: a water storage box (30), a circulating water pump (34) and a butterfly valve (35); A water storage box (30) is fixedly mounted on the bottom of the inner wall of the floating platform (1), and the water storage box (30) is in communication with the high-pressure pipeline (28). A circulating water pump (34) is fixedly mounted on the bottom of the inner wall of the water storage box (30), a four-way seat (33) is fixedly mounted on the outer wall of the circulating water pump (34), a butterfly valve (35) is fixedly mounted on the side of the outer wall of the four-way seat (33), and the butterfly valve (35) is opened and closed by a wireless micromotor program control.

7. A multi-sample collection and detection device for water quality analysis according to claim 6, characterized in that: The inner wall side of the floating platform (1) is provided with a water spraying groove, a water spraying seat (31) is fixedly installed in the water spraying groove, a nozzle (32) is fixedly installed on the front of the outer wall of the water spraying seat (31), a water delivery pipe (37) is fixedly installed on the back of the outer wall of the water spraying seat (31), a connecting pipe (36) is fixedly installed on the back of the outer wall of the water delivery pipe (37), and the connecting pipe (36) is connected to the butterfly valve (35).

8. The multi-sample collection and detection device for water quality analysis according to claim 7, characterized in that: A storage battery (38) is fixedly mounted on the top of the inner wall of the floating platform (1), and the storage battery (38) is connected to various electrical components in the multi-sample collection and detection device via a power line for power supply. An audible and visual alarm (6) is fixedly mounted on the top of the outer wall of the floating platform (1), and the audible and visual alarm (6) is connected to a water quality analysis processor (8) via a data signal line. An RGB diode is mounted in the audible and visual alarm (6).

9. The multi-sample collection and detection device for water quality analysis according to claim 4, characterized in that: The water quality analysis processor (8) is preset with a water quality data analysis and detection program, including a pH analysis and detection, a dissolved oxygen analysis and detection, a conductivity analysis and detection, a turbidity analysis and detection, and a heavy metal ion analysis and detection program.

10. The multi-sample collection and detection device for water quality analysis according to claim 4, characterized in that: The first sample detector (29), the second sample detector (23) and the third sample detector (17) are all equipped with a microfluidic chip, wherein a plurality of microchannels are arranged in the chip, and sample diversion, mixing and detection are performed according to a preset program.

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