Water environment quality detection system and method

Abstract

The invention relates to the technical field of water environment detection, in particular to a water environment quality detection system and method.The water environment quality detection system comprises a control mainboard, an air suction device, an airflow switcher, an air blowing cleaning mechanism, two lifting mechanisms and two analysis detectors, and the air suction device, the airflow switcher, the air blowing cleaning mechanism, the two lifting mechanisms and the two analysis detectors are connected with the control mainboard through electric signals. According to the invention, before the next detection, the gas in the previous detection can be completely discharged without residue, and if the measurement data of the corresponding gas sensor is inaccurate, the other group of gas sensors can be immediately used for measuring and re-measuring the sampling point, so that the gas detection distortion caused by the damage of the gas sensors is avoided. And when the air guide cover is switched to the target position, the air guide cover can be quickly closed, so that the air suction detection process can be quicker. And gas exhausted by the first gas outlet pipe can be switched among the three gas outlets, and three functions can be achieved through the simple structure.

Description

Technical Field

[0001] The present invention relates to the technical field of water environment detection, and in particular to a water environment quality detection system and method. Background Art

[0002] Testing for sewage in rivers requires researchers to collect samples from multiple locations throughout the lake and send them to a laboratory for further testing. Hyperspectral remote sensing water quality monitoring is also an option, but this method requires algorithms to calculate data and is significantly affected by weather and other environmental factors, potentially distorting the data.

[0003] Chinese Patent Application No.: CN202121456298.9, Title: Discloses a water environment quality detection device. Gas volatile from the surface of a water body is sent to the analysis and detection device for detection via an air suction pump and an analysis and detection device. The analysis and detection device, in its specific structure, employs a gas detection sensor. The gas detection sensor unilaterally receives volatile gas from the surface of the water body to detect environmental problems in the water body.

[0004] However, when testing on the water surface, multiple points are usually tested, and the gas sensor will have residual gas in the chamber that was not discharged during the previous test, which will affect the authenticity of subsequent tests. In addition, the gas inhaled by the gas sensor has a high moisture content, which will damage the sensing membrane on the gas sensor, resulting in a large data deviation. At this time, it is necessary to measure another set of data in time. Therefore, it is necessary to design a water environment quality detection system and method that can completely discharge the gas from the previous test without residue before the next test, and if the measurement data of the corresponding gas sensor is inaccurate, another set of gas sensors can be used to measure the sampling point again immediately to avoid gas detection distortion caused by gas sensor damage. Summary of the Invention

[0005] In response to the above-mentioned technical deficiencies, the purpose of the present invention is to provide a water environment quality detection system and method, which can completely discharge the gas from the previous detection without residue before the next detection, and if the measurement data of the corresponding gas sensor is inaccurate, the sampling point can be immediately measured again by another set of gas sensors to avoid gas detection distortion caused by damage to the gas sensor.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: the present invention provides a water environment quality detection system, including a control main board and an air suction device connected to the control main board by electrical signals, an air flow switcher, an air blowing cleaning mechanism, two lifting mechanisms and two groups of analytical detectors, and they are all fixedly installed inside a containing box, the containing box is fixedly installed on the platform of the hull, a signal antenna is provided on the top of the containing box, the signal antenna is connected to the electrical signal of the control main board, three air outlets are provided on the air flow switcher, two analytical detectors are respectively connected to the air outlets on both sides, the air blowing cleaning mechanism is connected to the middle air outlet, an air suction device is provided with an air suction pipe, and a gap of less than one centimeter is left between the air suction pipe and the water surface, the air flow switcher is used to drive the air outlet pipe of the air suction device to switch between the three air outlets, each group of analytical detectors is provided with a gas detection sensor and an air guide cover fixedly connected to the bottom of the containing box, the air guide cover is fixedly installed on the lifting plate of the lifting mechanism, and an air outlet pipe 2 is opened on the containing box.

[0007] Preferably, the air flow switch includes a track, a cover plate, an electric push rod and a hinged rod. The three air outlets are all located on the track. The cover plate can be installed on the track for horizontal sliding. The air outlet pipe 1 is fixedly installed on the cover plate. When the air outlet pipe 1 is coaxial with one of the air outlets, the air outlet pipe 1 is connected to the air outlet. One end of the hinged rod is hinged to the cover plate, and the other end of the hinged rod is hinged to the working end of the electric push rod 1. The electric push rod 1 is fixedly installed on the storage box, and the cover plate is transmission-connected to the lifting plate. When the cover plate is docked with the air outlet on the left or right side, the cover plate pushes the lifting plate on the left or right side to move downward. When the cover plate is docked with the air outlet in the middle, the cover plate is separated from the lifting plate on the left or right side.

[0008] Preferably, each lifting mechanism includes a trapezoidal block, an elastic seat, a guide column and a conduit. The elastic seat is fixedly mounted on the accommodating box. The trapezoidal block is fixedly connected to the displacement rod on the displacement rod. The displacement rod is used to horizontally push the trapezoidal block close to the lifting plate. The inclined surface of the trapezoidal block contacts the side of the lifting plate. The side of the trapezoidal block is fixedly provided with a side edge in contact with the cover plate. The guide column is vertically fixedly mounted on the top of the lifting plate. The conduit is slidably connected to the guide column and the guide column is fixedly mounted on the accommodating box.

[0009] Preferably, the air guide cover includes a hose, a cover shell and an air outlet pipe three. The multiple cover shells are interconnected. The leftmost cover shell is connected to the air outlet pipe three through a hose, and the rightmost cover shell is connected to the air outlet through another hose. The wiring harness on the gas detection sensor passes through the side arm of the cover shell and is connected to the control main board.

[0010] Preferably, the elastic seat includes a guide seat and two springs. The guide seat is fixedly installed on the accommodating box. The displacement rod can be installed on the guide seat for horizontal sliding. The spring is used to provide elastic force for the trapezoidal block to move away from the guide seat. A limiting plate is fixedly provided at one end of the displacement rod.

[0011] Preferably, the air suction device includes an air pump, a three-way pipe and a foam ball. The air pump is fixedly installed on the containing box. The air outlet pipe is connected to the air outlet of the air pump. The air suction port of the air pump is connected to one end of the three-way pipe. The air suction pipe runs through the other two ends of the three-way pipe. A strip-shaped air hole connected to the three-way pipe is opened in the middle of the air suction pipe. The foam ball is fixedly installed at the bottom of the air suction pipe, and a plurality of air inlets connected to the air suction pipe are opened on the outer edge of the foam ball. The air inlets are above the water surface.

[0012] Preferably, a guide bar is provided on the outer edge of the strip-shaped air vent, and a guide groove for sliding with the guide bar is provided on the inner edge of the tee.

[0013] Preferably, the gate mechanism includes an electric push rod 2 and a gate plate, the gate plate covers the air outlet pipe 2, the electric push rod 2 is fixedly installed on the accommodating box, and the output end of the electric push rod 2 is fixedly connected to the gate plate.

[0014] Preferably, the air blowing cleaning mechanism includes a long air pipe, the air outlet of the air pipe faces multiple gas detection sensors, and the top of the air pipe has a downward slope, one end of the connecting pipe is connected to the air pipe, and the other end of the connecting pipe is connected to the air outlet located in the middle.

[0015] A method for a water environment quality detection system comprises the following steps: Step 1: The ship travels to the point to be tested, the gate mechanism opens, and the air pump pumps air to one of the sets of analytical detectors; Step 2: If the water quality test meets the expected value, the ship will move to the next test point; Step 3: The water quality test is far beyond the expected value. The air flow switch switches the outlet pipe to connect to another set of analytical detectors, and then conducts testing through another set of analytical detectors. Step 4: In step 2, after reaching the next detection point, the air flow switch pushes the outlet pipe 1 to connect with the middle air outlet, so that the extracted gas will enter the air blowing cleaning mechanism and be discharged. The two lifting mechanisms simultaneously pull the air guide covers on the two sets of analytical detectors upward, and the gas remaining around the gas detection sensor is cleaned; Step 5: In the above-mentioned steps 2 and 3, when the cover moves to the left or right to the final position, the trapezoidal blocks on the left or right will be pushed away to both sides, and the gas guide cover will cover the gas detection sensor.

[0016] The beneficial effects of the present invention are that the water environment quality detection system and method can completely discharge the gas from the previous detection without any residue before the next detection, and if the measurement data of the corresponding gas sensor is inaccurate, the sampling point can be immediately measured again by another set of gas sensors to avoid gas detection distortion caused by damage to the gas sensor.

[0017] When switching to the target position, the air guide cover can be quickly closed, making the inhalation detection process more rapid. In addition, the gas discharged from the outlet pipe can be switched between three outlets. The relatively simple structure can achieve three functions: first, it is used to provide detection for the first set of analytical detectors; second, it is used to provide calibration detection for the second set of analytical detectors; third, it can quickly clean the residual gas near the gas detection sensor and cover the gas to be detected around it. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is the main view of the present invention in the installed state.

[0020] Figure 2 The top view of the box cover is removed for the present invention.

[0021] Figure 3 for Figure 2 main view.

[0022] Figure 4 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0023] Figure 5 Schematic diagram of the three-dimensional structure of the airflow switcher.

[0024] Figure 6 This is a schematic diagram of the partial three-dimensional structure decomposition of the airflow switch.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the lifting mechanism.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the air guide cover.

[0027] Figure 9 It is a schematic diagram of the three-dimensional structure of the elastic seat.

[0028] Figure 10 This is a schematic diagram of the three-dimensional structure of the air intake device.

[0029] Figure 11 Schematic diagram of the three-dimensional structure of the gate mechanism.

[0030] Figure 12 This is the main view of the air blowing cleaning mechanism.

[0031] Explanation of reference numerals: 1. hull; 2. analytical detector; 2a. gas detection sensor; 2b. air guide cover; 2b1. hose; 2b2. cover shell; 2b3. outlet pipe three; 3. container box; 3a. outlet pipe two; 4. suction device; 4a. suction pipe; 4b. outlet pipe one; 4c. air pump; 4d. three-way pipe; 4e. foam ball; 4f. strip-shaped air vent; 4h. guide strip; 5. air flow switch; 5a. outlet Mouth; 5b, track; 5c, cover plate; 5d, electric push rod 1; 5e, hinged rod; 6, lifting mechanism; 6a, lifting plate; 6b, trapezoidal block; 6b1, side; 6c, elastic seat; 6c1, displacement rod; 6d, guide column; 6e, guide tube; 7, air blowing cleaning mechanism; 7a, air pipe; 7b, connecting pipe; 8, gate mechanism; 8a, electric push rod 2; 8b, gate; 10, control main board; 11, signal antenna. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0033] Embodiment: The present invention provides a water environment quality detection system and method, such as Figure 1-12 As shown, it includes a control main board 10 and an air suction device 4 connected to the control main board 10 by electrical signals, an air flow switcher 5, an air blowing cleaning mechanism 7, two lifting mechanisms 6 and two sets of analytical detectors 2, and they are all fixedly installed inside the container box 3, the container box 3 is fixedly installed on the platform of the hull 1, a signal antenna 11 is provided on the top of the container box 3, the signal antenna 11 is connected to the control main board 10 by electrical signals, three air outlets 5a are provided on the air flow switcher 5, and the two analytical detectors 2 are respectively connected to the air outlets 5a on both sides. The air cleaning mechanism 7 is connected to the middle air outlet 5a. The air suction device 4 is provided with an air suction pipe 4a, with a gap of less than one centimeter between the air suction pipe 4a and the water surface. The air flow switch 5 is used to drive the air outlet pipe 1 4b of the air suction device 4 to switch between the three air outlets 5a. Each set of analytical detectors 2 is provided with a gas detection sensor 2a and an air guide cover 2b fixedly connected to the bottom of the storage box 3. The air guide cover 2b is fixedly mounted on the lifting plate 6a of the lifting mechanism 6. The storage box 3 is provided with an air outlet pipe 2 3a. The air suction device 4 operates so that the air suction pipe 4a extracts gas from the water surface and then inputs it into one of the analytical detectors 2 through the air outlet 5a, where it is detected by the analytical detector 2.

[0034] After each test is completed and there is no major abnormality in the data, the container 3 is moved to another sampling point by the hull 1. When it reaches the sampling point, the corresponding air guide cover 2b is pulled up by the lifting mechanism 6, and then the air outlet pipe of the air suction device 4 is switched to the middle air blowing cleaning mechanism 7 through the air flow switch 5 to blow air into the gas detection sensor 2a, so that the space around the gas detection sensor 2a is covered with the air of the new sampling point. After the covering is completed, the air guide cover 2b is closed downward, and the air is extracted by the air suction device 4 for the next air extraction test.

[0035] If the data is abnormal, it may be that the water pollution is more serious or the gas detection sensor 2a is damaged. Therefore, the outlet pipe 4b of the suction device 4 is connected to another analytical detector 2 through the airflow switch 5, and the gas detection sensor 2a inside it is blown for a second detection. If the data of the two tests are the same, it means that the water pollution is more serious. If the data are different, it means that the gas detection sensor 2a is damaged.

[0036] The second gas outlet pipe 3 a is used to allow the gas in the container box 3 to be discharged from the container box 3 to avoid residual mixed gas in the container box 3 after multiple tests.

[0037] Because each time the air cleaning mechanism 7 performs cleaning, both analytical detectors 2 are active due to severe water contamination. Therefore, both air guide covers 2b need to be opened upward. To facilitate cleaning, the two air guide covers 2b are normally open. Only when the corresponding analytical detector 2 is in operation is the air guide cover 2b closed to cover the gas detection sensor 2a. This speeds up the process between the three, ensuring that the detection process can proceed more quickly. This also allows for the air outlet pipe 4b to be switched and docked. The air flow switch 5 includes a track 5b, a cover plate 5c, an electric push rod 5d and a hinged rod 5e. The three air outlets 5a are all located on the track 5b. The cover plate 5c can be installed on the track 5b in a horizontal sliding manner. The air outlet pipe 4b is fixedly installed on the cover plate 5c. When the air outlet pipe 4b is coaxial with one of the air outlets 5a, the air outlet pipe 4b is connected to the air outlet 5a. One end of the hinged rod 5e is hinged to the cover plate 5c, and the other end of the hinged rod 5e is hinged to the working end of the electric push rod 5d. The electric push rod 5d is fixedly installed on the storage box 3, and the cover plate 5c is transmission-connected to the lifting plate 6a. By controlling the electric push rod 5d to work, the electric push rod 5d pulls the hinged rod 5 When the cover plate 5c is aligned with the left or right air outlet 5a, the cover plate 5c pushes the left or right lifting plate 6a downward, allowing the air guide cover 2b to cover the corresponding gas detection sensor 2a, allowing the subsequent analysis detector 2 to perform gas extraction testing. When the cover plate 5c is aligned with the middle air outlet 5a, the cover plate 5c separates from the left or right lifting plate 6a. At this point, both air guide covers 2b are in an upwardly open position, and the air cleaning mechanism 7 can perform gas cleaning on multiple gas detection sensors 2a when blowing air. When switching to the target position, the cover can be quickly closed, making the air intake testing process more rapid. Furthermore, the gas discharged from the air outlet pipe 14b can be switched between the three air outlets 5a. This relatively simple structure can achieve three functions.

[0038] Each lifting mechanism 6 includes a trapezoidal block 6b, an elastic seat 6c, a guide column 6d and a guide tube 6e. The elastic seat 6c is fixedly mounted on the accommodating box 3. The trapezoidal block 6b is fixedly connected to the displacement rod 6c1 on the displacement rod 6c1. The displacement rod 6c1 is used to horizontally push the trapezoidal block 6b close to the lifting plate 6a. The inclined surface of the trapezoidal block 6b contacts the side of the lifting plate 6a. The side of the trapezoidal block 6b is fixedly provided with a side edge 6b1 that contacts the cover plate 5c. The guide column 6d is vertically fixedly mounted on the top of the lifting plate 6a. The guide tube 6e is slidably connected to the guide column 6d and the guide column 6d is fixedly mounted on the accommodating box 3. When the air outlet pipe 4b is pushed to connect with the air outlet 5a on the left or right side, in the final stage, the cover plate 5c will push the side 6b1, so that the trapezoidal block 6b will be driven to move away from the lifting plate 6a, and the air guide cover 2b will drive the lifting plate 6a to move downward through gravity, so that the guide column 6d slides vertically downward along the guide tube 6e, realizing the automatic closing of the air guide cover 2b, and the air guide cover 2b on the other side will be pushed upward by the trapezoidal block 6b to lift the lifting plate 6a, so that the air guide cover 2b opens upward.

[0039] The guide column 6d and the guide tube 6e guide the vertical movement of the air guide cover 2b.

[0040] To ensure that the air guide cover 2b can move up and down during cleaning without affecting its sealed connection with the air outlet 5a, the air guide cover 2b includes a hose 2b1, a cover shell 2b2, and a third air outlet pipe 2b3. The multiple cover shells 2b2 are interconnected: the leftmost cover shell 2b2 is connected to the third air outlet pipe 2b3 via the hose 2b1, and the rightmost cover shell 2b2 is connected to the air outlet 5a via another hose 2b1. The hose 2b1 structure ensures sufficient upward movement when the cover shell 2b2 moves up or down. The wiring harness of the gas detection sensor 2a is connected to the control board 10 through the side arm of the cover shell 2b2. Gas exhausted from the air outlet 5a passes through the hose 2b1 into the multiple cover shells 2b2 and is finally discharged through the third air outlet pipe 2b3. This ensures that the gas on the lake surface is continuously flowing into the cover shell 2b2, ensuring the accuracy of the gas detection sensor 2a's detection data, rather than peak values ​​within a specific time period. And the air flow can be discharged quickly along the air outlet pipe 3 2b3.

[0041] The elastic seat 6c includes a guide seat 6c2 and two springs 6c3. The guide seat 6c2 is fixedly mounted on the accommodating box 3. The displacement rod 6c1 is mounted on the guide seat 6c2 so as to slide horizontally. The springs 6c3 are used to provide an elastic force to move the trapezoidal block 6b away from the guide seat 6c2. A limit plate is fixedly mounted on one end of the displacement rod 6c1. The springs 6c3 are mounted on the displacement rod 6c1. One end of the spring 6c3 contacts the guide seat 6c2, and the other end of the spring 6c3 contacts the trapezoidal block 6b. The springs 6c3 apply an elastic force to the trapezoidal block 6b, pushing the lifting plate 6a upward.

[0042] The air intake device 4 includes an air pump 4c, a tee 4d, and a foam ball 4e. The air pump 4c is fixedly mounted on the container 3. An outlet pipe 4b is connected to the air outlet of the air pump 4c. The air intake of the air pump 4c is connected to one end of the tee 4d. The air intake pipe 4a runs through the other two ends of the tee 4d. The middle portion of the air intake pipe 4a is provided with a strip-shaped air vent 4f that communicates with the tee 4d. The foam ball 4e is fixedly mounted at the bottom of the air intake pipe 4a. The outer edge of the foam ball 4e is provided with multiple air inlets that communicate with the air intake pipe 4a. The air inlets are above the water surface. The air pump 4c draws the lake surface gas through the inlet opening of the foam ball 4e. After being drawn in, the gas is then fed into the tee 4d through the strip-shaped air vent 4f on the air intake pipe 4a. The height of the air intake pipe 4a can be automatically adjusted according to the draft of the boat. During height adjustment, the strip-shaped air holes 4f are able to connect the three-way pipe 4d and the air intake pipe 4a due to their longer height.

[0043] A guide bar 4h is provided on the outer edge of the strip-shaped air vent 4f, and a guide groove is provided on the inner edge of the tee pipe 4d, which slides with the guide bar 4h. The guide bar 4h and the guide groove prevent the air intake pipe 4a from rotating during its vertical movement, thus preventing rotation between the strip-shaped air vent 4f and the tee pipe 4d.

[0044] The gate mechanism 8 comprises an electric push rod 8a and a gate plate 8b. The gate plate 8b covers the air outlet pipe 3a. The electric push rod 8a is fixedly mounted on the container 3, and the output end of the electric push rod 8a is fixedly connected to the gate plate 8b. By controlling the electric push rod 8a, the electric push rod 8a pulls the gate plate 8b to move vertically, thereby opening and closing the air outlet pipe 3a.

[0045] The air-blowing cleaning mechanism 7 includes a long, rectangular air pipe 7a, the outlet of which faces the multiple gas detection sensors 2a. The top of the air pipe 7a has a downward slope. One end of a connecting pipe 7b is connected to the air pipe 7a, and the other end of the connecting pipe 7b is connected to the central air outlet 5a. Gas at the test point is blown out through the air outlet 5a and then discharged along the air pipe 7a, blowing away the gas near the previous gas detection sensor 2a. This allows the air-blowing cleaning mechanism 7 to clean the multiple gas detection sensors 2a.

[0046] A method for a water environment quality detection system comprises the following steps: Step 1: The ship 1 travels to the point to be tested, the gate mechanism 8 opens, and the air pump 4c pumps air to one of the groups of analytical detectors 2; Step 2: If the water quality test meets the expected value, the ship 1 moves to the next test point; Step 3: The water quality test is far beyond the expected value, and the air flow switch 5 switches the outlet pipe 1 4b to connect to another set of analysis detectors 2, and the test is carried out through another set of analysis detectors 2; Step 4: In step 2, after reaching the next detection point, the air flow switch 5 pushes the air outlet pipe 1 4b to connect with the middle air outlet 5a, so that the extracted gas will enter the air blowing cleaning mechanism 7 and be discharged. The two lifting mechanisms 6 simultaneously pull the air guide covers 2b on the two sets of analytical detectors 2 upward at the same time, and the gas remaining around the gas detection sensor 2a is cleaned; Step 5: In the above-mentioned steps 2 and 3, when the cover plate 5c moves to the left or right to the final position, the trapezoidal block 6b on the left or right side will be pushed away to both sides, and the gas guide cover 2b covers the gas detection sensor 2a.

[0047] This water environment quality detection system and method can completely discharge the gas from the previous detection without any residue before the next detection. If the measurement data of the corresponding gas sensor is inaccurate, another set of gas sensors can be used to measure the sampling point again immediately to avoid gas detection distortion caused by gas sensor damage.

[0048] When switching to the target position, the air guide cover 2b can be quickly closed, making the inhalation detection process more rapid. In addition, the gas discharged from the outlet pipe 1 4b can be switched between the three outlet ports 5a. This relatively simple structure can achieve three functions: first, it is used for detection by the first set of analytical detectors 2; second, it is used for verification and detection by the second set of analytical detectors 2; and third, it can quickly clean the residual gas near the gas detection sensor 2a from the previous operation and cover the gas to be detected around it.

[0049] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A water environment quality detection system, characterized in that: The invention comprises a control main board (10), an air suction device (4) electrically connected to the control main board (10), an air flow switch (5), an air blowing cleaning mechanism (7), two lifting mechanisms (6) and two sets of analytical detectors (2), all of which are fixedly installed inside a container box (3). The container box (3) is fixedly installed on a platform of a hull (1). A signal antenna (11) is provided on the top of the container box (3). The signal antenna (11) is electrically connected to the control main board (10). Three air outlets (5a) are provided on the air flow switch (5). The two analytical detectors (2) are respectively connected to the air outlets (5a) on both sides. The air blowing cleaning mechanism (7) is connected to the middle air outlet (5a), the air suction device (4) is provided with an air suction pipe (4a), and a gap of less than one centimeter is left between the air suction pipe (4a) and the water surface. The air flow switch (5) is used to drive the air outlet pipe 1 (4b) of the air suction device (4) to switch between the three air outlets (5a). Each group of analytical detectors (2) is provided with a gas detection sensor (2a) and an air guide cover (2b) fixedly connected to the bottom of the storage box (3). The air guide cover (2b) is fixedly installed on the lifting plate (6a) of the lifting mechanism (6), and the storage box (3) is provided with an air outlet pipe 2 (3a).

2. A water environment quality detection system according to claim 1, characterized in that: The air flow switch (5) includes a track (5b), a cover plate (5c), an electric push rod (5d) and a hinged rod (5e). The three air outlets (5a) are all located on the track (5b). The cover plate (5c) can be installed on the track (5b) in a horizontally slidable manner. The air outlet pipe (4b) is fixedly installed on the cover plate (5c). When the air outlet pipe (4b) is coaxial with one of the air outlets (5a), the air outlet pipe (4b) is connected to the air outlet (5a). One end of the hinged rod (5e) is hinged to the cover plate (5c). The other end of the hinged rod (5e) is hinged to the working end of the electric push rod (5d), the electric push rod (5d) is fixedly installed on the accommodating box (3), and the cover plate (5c) is transmission-connected to the lifting plate (6a). When the cover plate (5c) is docked with the air outlet (5a) on the left or right side, the cover plate (5c) pushes the lifting plate (6a) on the left or right side to move downward. When the cover plate (5c) is docked with the air outlet (5a) in the middle, the cover plate (5c) and the lifting plate (6a) on the left or right side are separated.

3. A water environment quality detection system according to claim 2, characterized in that: Each lifting mechanism (6) comprises a trapezoidal block (6b), an elastic seat (6c), a guide column (6d) and a guide tube (6e); the elastic seat (6c) is fixedly mounted on the accommodating box (3); the trapezoidal block (6b) is fixedly connected to the displacement rod (6c1) on the displacement rod (6c1); the displacement rod (6c1) is used to horizontally push the trapezoidal block (6b) close to the lifting plate (6a); the inclined surface of the trapezoidal block (6b) contacts the side of the lifting plate (6a); the side of the trapezoidal block (6b) is fixedly provided with a side edge (6b1) in contact with the cover plate (5c); the guide column (6d) is vertically fixedly mounted on the top of the lifting plate (6a); the guide tube (6e) is slidably connected to the guide column (6d), and the guide column (6d) is fixedly mounted on the accommodating box (3).

4. A water environment quality detection system according to claim 3, characterized in that: The air guide cover (2b) comprises a hose (2b1), a cover shell (2b2) ​​and an air outlet pipe three (2b3). The multiple cover shells (2b2) ​​are interconnected. The leftmost cover shell (2b2) ​​is connected to the air outlet pipe three (2b3) via a hose (2b1), and the rightmost cover shell (2b2) ​​is connected to the air outlet (5a) via another hose (2b1). The wiring harness on the gas detection sensor (2a) passes through the side arm of the cover shell (2b2) ​​and is connected to the control main board (10).

5. A water environment quality detection system as claimed in claim 3, characterized in that: The elastic seat (6c) comprises a guide seat (6c2) and two springs (6c3); the guide seat (6c2) is fixedly mounted on the accommodating box (3); the displacement rod (6c1) is mounted on the guide seat (6c2) in a manner capable of horizontal sliding; the spring (6c3) is used to provide an elastic force for the trapezoidal block (6b) to move away from the guide seat (6c2); and a limit plate is fixedly provided at one end of the displacement rod (6c1).

6. A water environment quality detection system according to claim 1, characterized in that: The air suction device (4) comprises an air pump (4c), a three-way pipe (4d) and a foam ball (4e), wherein the air pump (4c) is fixedly mounted on the housing box (3), an air outlet pipe (4b) is connected to the air outlet of the air pump (4c), the air suction port of the air pump (4c) is connected to one end of the three-way pipe (4d), the air suction pipe (4a) passes through the other two ends of the three-way pipe (4d), a strip-shaped air hole (4f) connected to the three-way pipe (4d) is provided in the middle of the air suction pipe (4a), the foam ball (4e) is fixedly mounted on the bottom of the air suction pipe (4a), and a plurality of air inlets connected to the air suction pipe (4a) are provided on the outer edge of the foam ball (4e), and the air inlets are above the water surface.

7. A water environment quality detection system according to claim 6, characterized in that: A guide bar (4h) is provided on the outer edge of the strip-shaped air vent (4f), and a guide groove for sliding with the guide bar (4h) is provided on the inner edge of the three-way pipe (4d).

8. A water environment quality detection system according to claim 1, characterized in that: The gate mechanism (8) includes an electric push rod 2 (8a) and a gate plate (8b), wherein the gate plate (8b) covers the air outlet pipe 2 (3a), the electric push rod 2 (8a) is fixedly mounted on the accommodating box (3), and the output end of the electric push rod 2 (8a) is fixedly connected to the gate plate (8b).

9. A water environment quality detection system according to claim 1, characterized in that: The air blowing cleaning mechanism (7) comprises a long strip air pipe (7a), the air outlet of the air pipe (7a) faces the plurality of gas detection sensors (2a), and the top of the air pipe (7a) has a downwardly inclined slope, one end of the connecting pipe (7b) is connected to the air pipe (7a), and the other end of the connecting pipe (7b) is connected to the air outlet (5a) located in the middle.

10. A method for detecting water environment quality according to claim 9, characterized in that: The following steps are involved: Step 1: The hull (1) travels to the point to be tested, the gate mechanism (8) opens, and the air pump (4c) pumps air and delivers it to one of the sets of analytical detectors (2); Step 2: If the water quality test meets the expected value, the ship (1) moves to the next test point; Step 3: The water quality test is far beyond the expected value, and the air flow switch (5) switches the outlet pipe 1 (4b) to connect to another set of analytical detectors (2), and the test is performed through another set of analytical detectors (2); Step 4: In the above-mentioned step 2, after the vehicle reaches the next detection point, the air flow switch (5) pushes the air outlet pipe 1 (4b) to connect with the middle air outlet (5a), so that the extracted gas enters the air blowing cleaning mechanism (7) and is discharged. The two lifting mechanisms (6) simultaneously pull the air guide covers (2b) on the two sets of analytical detectors (2) upward at the same time, and the gas remaining around the gas detection sensor (2a) is cleaned; Step 5: In the above-mentioned steps 2 and 3, when the cover plate (5c) moves to the left or right to the final position, the trapezoidal block (6b) on the left or right side will be pushed away to both sides, and the gas guide cover (2b) covers the gas detection sensor (2a).

Images