An online intelligent monitoring device and method for water quality in a water environment

Abstract

The present application relates to the field of water quality monitoring, in particular to a water environment water quality online intelligent monitoring device and method, the water environment water quality online intelligent monitoring device includes a shell, a defoaming mechanism and a monitoring mechanism; The shell is provided with a water inlet and a water outlet, and a water flow channel is formed in the inside; The water inlet is provided with a water inlet valve; The defoaming mechanism includes a negative pressure cylinder arranged in the shell and a piston assembly arranged in the negative pressure cylinder; The upward movement of the piston assembly not only sucks the water flow channel to negative pressure, promotes the bubble in the water flow to precipitate, but also increases the pressure difference on both sides of the water inlet valve, promotes the water flow to pass through the water inlet valve and enter the water flow channel. According to the amount of gas in the water flow, the opening threshold of the water inlet valve is adjusted, so that the piston assembly enters new water flow from the water inlet valve when the absolute value of the suction to negative pressure in the water flow channel is large enough, to ensure the precipitation effect of the original water flow in the water flow channel and the newly entered water flow, and then improve the accuracy of the monitoring mechanism for water quality monitoring.

Description

Technical Field

[0001] This invention relates to the field of water quality monitoring, specifically to an online intelligent monitoring device and method for aquatic environment water quality. Background Technology

[0002] With increasing awareness of aquatic environmental protection and rising demands for water quality safety, online water quality monitoring devices have been widely used in industrial production, environmental supervision, and drinking water safety. These devices typically use optical, electrochemical, or spectroscopic sensing technologies to detect key parameters in water bodies in real time, such as turbidity, pH value, and chemical oxygen demand (COD), to achieve continuous monitoring and early warning of water quality.

[0003] However, in practical applications, monitoring devices are often interfered with by air bubbles in the water, severely affecting the accuracy and reliability of measurement results. This is especially true in turbulent or rapidly flowing water environments (such as pipeline transport, discharge outlets, or under agitation conditions), where a large number of tiny air bubbles are easily generated. These bubbles can cause light scattering or reflection along the optical sensor path, leading to deviations in optical measurements such as absorbance and transmittance. When attached to the surface of electrochemical sensors, they may hinder the contact between the electrodes and the analyte, causing distortion or delay in the response signal. Furthermore, the presence of air bubbles can interfere with the stability of the sampling system, resulting in insufficient sample representativeness or flow fluctuations.

[0004] In existing technologies, although some devices use simple methods such as mechanical defoaming, static sedimentation, or increasing the outlet water pressure to reduce the impact of air bubbles, these methods are often difficult to meet the real-time requirements of online monitoring and affect the accuracy of the detection results when there are many air bubbles. Summary of the Invention

[0005] This invention provides an online intelligent monitoring device and method for aquatic environment water quality, in order to solve the problem that existing water quality monitoring devices fail to defoam in time when there are many bubbles, thus affecting the detection results.

[0006] The present invention provides an online intelligent monitoring device and method for aquatic environment water quality, which adopts the following technical solution:

[0007] An online intelligent monitoring device for aquatic environment water quality includes a shell, a defoaming mechanism, a monitoring mechanism, and a linkage component. The shell has an inlet and an outlet, and an internal water flow channel allows water to flow unidirectionally from the inlet to the outlet. An inlet valve is installed at the inlet, and its opening threshold is adjustable, defined as the pressure difference between the inlet side of the valve and the water flow channel. The defoaming mechanism and the monitoring mechanism are located upstream and downstream of the water flow channel, respectively. The defoaming mechanism includes a negative pressure cylinder within the shell and a piston assembly within the negative pressure cylinder. The negative pressure cylinder is located above and communicates with the water flow channel, and the piston assembly contains an air chamber, the lower end of which is unidirectionally connected to the water flow channel. The piston assembly has an adjustment mode and a working mode. In the adjustment mode, the volume of the air chamber is variable. The piston assembly moves upward to draw the water flow channel to negative pressure, and moves downward to allow gas in the water flow channel to enter the air chamber. The volume change of the air chamber is fed back to the water inlet valve through the linkage assembly, adjusting the opening threshold of the water inlet valve to be positively correlated with the volume of the air chamber. In the working mode, the upper end of the air chamber is connected to the outside. The piston assembly moves upward to draw the water flow channel to negative pressure, causing the water inlet valve to open and water to flow from the inlet into the water flow channel. The piston assembly moves downward to pressurize the water flow channel and allow gas in the water flow channel to enter the air chamber. The liquid in the water flow channel flows to the monitoring mechanism. The monitoring mechanism is used to monitor the water quality.

[0008] Optionally, a water passage valve is provided in the water flow channel and between the defoaming mechanism and the monitoring mechanism. The water passage valve opens when the piston assembly moves downward and squeezes the water flow channel to a preset degree, and closes when the piston assembly moves upward.

[0009] Optionally, the piston assembly includes a central rod, a negative pressure piston, and a floating piston. The central rod is vertically positioned and can move up and down relative to the negative pressure cylinder. The negative pressure piston is installed at the lower end of the central rod and slides and seals against the inner wall of the negative pressure cylinder. The floating piston is sleeved outside the central rod and slides and seals against the inner wall of the negative pressure cylinder. The floating piston is located above the negative pressure piston and defines the air chamber between the negative pressure piston and the inner wall of the negative pressure cylinder. When the volume of the air chamber increases, the floating piston moves upward relative to the negative pressure piston. The negative pressure piston has an air inlet that connects the air chamber and the water flow channel, and an air inlet valve is installed at the air inlet. The floating piston has an air outlet that connects the air chamber and the outside, and an opening and closing valve is installed at the air outlet. In the adjustment mode, the air outlet of the piston assembly is closed, and in the working mode, the air outlet is open. When the central rod drives the negative pressure piston to move upward, the air inlet is closed; when the central rod drives the negative pressure piston to move downward, the air inlet is open.

[0010] Optionally, the inlet valve includes a valve plate, a first elastic element, and an adjusting ring. A stepped surface is provided at the inlet of the water flow channel. The adjusting ring is installed in the water flow channel and its position within the water flow channel is adjustable. The adjusting ring is connected to the valve plate through the first elastic element. Under the action of the first elastic element, the valve plate abuts against the stepped surface, thereby blocking the inlet. The closer the adjusting ring is to the valve plate, the greater the compression of the first elastic element, and the greater the pressure difference required for the valve plate to open. The linkage component changes the opening threshold of the inlet valve by changing the position of the adjusting ring.

[0011] Optionally, the floating piston and the negative pressure piston are screwed together by two sleeves fitted outside the central rod. The two sleeves are connected to the floating piston and the negative pressure piston respectively. When the volume of the air chamber increases, the floating piston moves upward and rotates relative to the negative pressure piston. The linkage component uses mechanical transmission to transmit the rotation of the floating piston to the adjusting ring, so that the adjusting ring moves and changes position. The more the volume of the air chamber increases, the more rotations the floating piston makes, and the smaller the initial distance between the adjusting ring and the valve plate.

[0012] Optionally, a locking element is provided on the upper side of the negative pressure piston. In the working mode, the locking element restricts the relative rotation of the two sleeves, thereby restricting the movement of the floating piston and keeping the adjusting ring in the adjusted position.

[0013] Optionally, the adjusting ring is driven to move by a power component. The linkage components include a displacement sensor and a central control module. The displacement sensor is located on the upper side of the negative pressure piston to monitor the distance the floating piston moves relative to the negative pressure piston and feeds it back to the central control module. The central control module controls the distance the power component drives the adjusting ring to move based on the displacement of the floating piston. The greater the distance the floating piston moves relative to the negative pressure piston, the greater the distance the power component drives the adjusting ring to move closer to the valve plate.

[0014] Optionally, a floating plate is provided in the water flow channel and below the piston assembly. The floating plate moves upward as the liquid level in the water flow channel rises. When the piston assembly moves downward and the negative pressure piston is in contact with the floating plate, the floating plate blocks the air inlet.

[0015] Optionally, the monitoring mechanism includes a detection head, a pressurizing piston, a second elastic element, and a detection cylinder. The detection cylinder is fixed inside the housing, with its upper end sealed and its lower end connected to the water flow channel. The detection cylinder is located between the water inlet valve and the outlet. The detection head is installed inside the water flow channel and located below the detection cylinder. The pressurizing piston is slidably installed inside the detection cylinder and connected to the detection cylinder through the second elastic element to pressurize the water flow flowing to the bottom of the detection cylinder. A solenoid valve is installed at the outlet. The solenoid valve opens after the detection head completes the detection, allowing the water in the water flow channel to flow out.

[0016] A method for online intelligent monitoring of aquatic environment water quality, utilizing the aforementioned online intelligent monitoring device for aquatic environment water quality, includes the following steps:

[0017] S10, the water to be tested is pre-filled into the water flow channel, and the inlet and outlet are sealed;

[0018] S20 puts the piston assembly in adjustment mode, and the piston assembly moves up and down repeatedly, without extending into the lower side of the water surface when moving downward.

[0019] S30, the linkage component adjusts the opening threshold of the water inlet valve according to the volume change of the air chamber;

[0020] S40, open the inlet and outlet to switch the piston assembly to the working mode;

[0021] S50, the piston assembly moves up and down reciprocally, and when it moves upward, it draws water into the water flow channel to create a negative pressure, and when it moves downward, it allows the gas in the water flow to enter the air chamber and push the water flow towards the monitoring mechanism.

[0022] S60, water flows out of the outlet after being monitored by the monitoring agency.

[0023] The beneficial effects of this invention are as follows: The upward movement of the piston assembly in the online intelligent water quality monitoring device of this invention not only draws the water flow channel to a negative pressure, causing air bubbles in the water flow to precipitate, but also increases the pressure difference on both sides of the inlet valve, prompting water to enter the water flow channel through the inlet valve. The inlet pressure of the inlet valve is adjusted according to the amount of gas in the water flow, so that the piston assembly draws the water flow channel to a sufficiently high negative pressure before allowing new water flow to enter through the inlet valve. This ensures the effective precipitation of air bubbles in both the original water flow and the newly entering water flow, thereby improving the accuracy of water quality monitoring by the monitoring agency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the online intelligent monitoring device for aquatic environment water quality according to the present invention;

[0026] Figure 2 This is a cross-sectional schematic diagram of the overall structure of an embodiment of an online intelligent monitoring device for aquatic environment water quality according to the present invention;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0029] Figure 5 This is a cross-sectional schematic diagram of another embodiment of the online intelligent monitoring device for aquatic environment water quality according to the present invention;

[0030] Figure 6 for Figure 5 Enlarged diagram of point C in the middle.

[0031] In the diagram: 100, housing; 110, water inlet; 120, water inlet valve; 121, valve plate; 122, first elastic element; 123, adjusting ring; 124, power element; 130, water passage valve; 140, solenoid valve; 150, water outlet; 160, floating plate; 200, defoaming mechanism; 210, negative pressure cylinder; 220, center rod; 221, transmission rod; 222, motor; 223, transmission ring; 230, negative pressure piston; 231, air inlet valve; 240, floating piston; 241, opening and closing valve; 251, first gear; 252, second gear; 253, first rod; 254, second rod; 255, rack; 260, locking element; 271, displacement sensor; 300, monitoring mechanism; 310, detection head; 320, pressurizing piston; 330, second elastic element; 340, detection cylinder. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] An embodiment of the online intelligent monitoring device for aquatic environment water quality according to the present invention, such as... Figures 1 to 4 As shown, it includes a housing 100, a defoaming mechanism 200, a monitoring mechanism 300, and a linkage component.

[0034] The housing 100 has an inlet 110 and an outlet 150. Inside the housing 100, a water flow channel allows water to flow unidirectionally from the inlet 110 to the outlet 150. An inlet valve 120 is installed at the inlet 110. The opening threshold of the inlet valve 120 is adjustable; the opening threshold is the pressure difference between the inlet side of the inlet valve 120 and the water flow channel. Ball valves (not shown in the figure) can be installed at the inlet 110 and outlet 150 to control the opening and closing of the inlet 110 and outlet 150, thereby controlling the water inlet and outlet of the entire water flow channel.

[0035] The defoaming mechanism 200 and the monitoring mechanism 300 are located upstream and downstream of the water flow channel, respectively. That is, the water in the water flow channel flows through the defoaming mechanism 200 and the monitoring mechanism 300 in sequence and is discharged from the outlet 150. The defoaming mechanism 200 includes a negative pressure cylinder 210 disposed in the housing 100 and a piston assembly disposed in the negative pressure cylinder 210. The negative pressure cylinder 210 is located above the water flow channel and communicates with the water flow channel. An air chamber is provided in the piston assembly, and the lower end of the air chamber is unidirectionally connected to the water flow channel. The piston assembly has an adjustment mode and a working mode. In the adjustment mode, the air chamber is sealed and its volume is variable. The piston assembly moves upward to draw the water flow channel to negative pressure and moves downward to allow the gas in the water flow channel to enter the air chamber. The volume change of the air chamber is fed back to the water inlet valve 120 through the linkage component. The linkage component adjusts the opening threshold of the water inlet valve 120 to be positively correlated with the volume of the air chamber. In the working mode, the upper end of the air chamber is connected to the outside. The piston assembly moves upward to draw the water flow channel to negative pressure, causing the water inlet valve 120 to open. Water flows from the water inlet 110 into the water flow channel. The piston assembly moves downward to pressurize the water flow channel and allow the gas in the water flow channel to enter the air chamber. The liquid in the water flow channel flows to the monitoring mechanism 300.

[0036] Monitoring agency 300 is used to monitor water quality.

[0037] Before continuous water quality monitoring, the water to be monitored is introduced into the water flow channel, and the inlet 110 and outlet 150 are closed. The piston assembly is in adjustment mode. When the piston assembly moves upward, it draws in negative pressure into the water flow channel, causing air bubbles in the water to precipitate. When the piston assembly moves downward, the gas precipitated in the water flow channel enters the air chamber, increasing its volume. The piston assembly can move up and down repeatedly to ensure that all air bubbles in the water are completely precipitated. The linkage component adjusts the opening threshold of the inlet valve 120 according to the volume change of the air chamber. The greater the increase in the volume of the air chamber, the more air bubbles are present in the water being tested. By increasing the opening threshold of the inlet valve 120, the pressure difference required for the water to enter the water flow channel increases. This results in a larger absolute value of the negative pressure in the water flow channel when the piston assembly moves upward, ensuring that air bubbles in the water are precipitated as completely as possible. After the threshold adjustment is completed, the inlet 110 and outlet 150 are opened, the piston assembly switches to the working mode, and when the piston assembly moves upward, it draws the water flow channel to negative pressure, causing the air bubbles in the water to burst and precipitate. When the absolute value of the negative pressure in the water flow channel increases to the opening threshold of the inlet valve 120, the inlet valve 120 opens. The air bubbles in the newly entered water flow are precipitated under the action of the negative pressure in the water flow channel. Then the piston assembly moves downward, causing the precipitated gas to be discharged through the air chamber and squeezing the water flow in the water flow channel to the monitoring mechanism 300. After the monitoring mechanism 300 monitors the water quality, the water flow is discharged from the outlet 150.

[0038] The upward movement of the piston assembly not only draws the water flow channel to a negative pressure, causing air bubbles to precipitate in the water, but also increases the pressure difference across the inlet valve 120, prompting water to enter the water flow channel through the inlet valve 120. The opening threshold of the inlet valve 120 is adjusted according to the amount of gas in the water flow, ensuring that new water flow enters through the inlet valve 120 only when the absolute value of the negative pressure drawn into the water flow channel by the piston assembly is sufficiently large. This guarantees the effective precipitation of air bubbles in both the existing water flow and the newly entering water flow, thereby improving the accuracy of water quality monitoring by the monitoring agency 300.

[0039] In this embodiment, a water-passing valve 130 is provided within the water flow channel and between the defoaming mechanism 200 and the monitoring mechanism 300. The water-passing valve 130 opens when the piston assembly moves downward and compresses the water flow channel to a preset degree, and closes when the piston assembly moves upward. The section of the water flow channel between the inlet valve 120 and the water-passing valve 130 is the defoaming section. The water-passing valve 130 is a one-way pressure valve, which allows water to flow only when the water pressure in the defoaming section increases to a certain level, thus preventing backflow of water in the water flow channel when the piston assembly moves upward.

[0040] In this embodiment, the piston assembly includes a central rod 220, a negative pressure piston 230, and a floating piston 240. The central rod 220 is vertically arranged and can move up and down relative to the negative pressure cylinder 210. Specifically, a transmission rod 221 is hinged to the upper end of the central rod 220 around a horizontal axis. A motor 222 is fixed to the upper side of the negative pressure cylinder 210. The output shaft of the motor 222 is parallel to the hinge axis of the central rod 220 and the transmission rod 221. A transmission ring 223 coaxial with the output shaft of the motor 222 is fixed on the output shaft of the motor 222. The non-center position of the transmission ring 223 is hinged to the upper end of the transmission rod 221, and the hinge line is parallel to the output shaft of the motor 222. The rotation of the output shaft of the motor 222 drives the transmission ring 223 to rotate, causing the transmission rod 221 to move up and down while swinging in the horizontal direction, thus driving the central rod 220 to move up and down. The negative pressure piston 230 is installed at the lower end of the central rod 220, moves up and down synchronously with the central rod 220, and slides and seals against the inner wall of the negative pressure cylinder 210. A floating piston 240 is sleeved outside the central rod 220 and slides in a sealed manner with the inner wall of the negative pressure cylinder 210. The floating piston 240 is located above the negative pressure piston 230 and defines the air chamber between the negative pressure piston 230 and the inner wall of the negative pressure cylinder 210. When the volume of the air chamber increases, the floating piston 240 moves upward relative to the negative pressure piston 230. The negative pressure piston 230 has an air inlet that connects the air chamber and the water flow channel, and an air inlet valve 231 is installed at the air inlet. The floating piston 240 has an air outlet that connects the air chamber and the outside, and an opening and closing valve 241 is installed at the air outlet. Specifically, the air outlet communicates with the chamber located above the floating piston 240 inside the negative pressure cylinder 210. The upper end of the negative pressure cylinder 210 communicates with the inside of the housing 100, and the housing 100 has a vent hole (not shown in the figure) that communicates with its interior, so that when the air outlet is opened, the air chamber can communicate with the outside. In the adjustment mode, the air outlet of the piston assembly is closed; in the working mode, the air outlet is open. When the center rod 220 drives the negative pressure piston 230 to move upward, the air inlet is closed; when the center rod 220 drives the negative pressure piston 230 to move downward, the air inlet is open.

[0041] In this embodiment, the inlet valve 120 includes a valve plate 121, a first elastic element 122, and an adjusting ring 123. A stepped surface is provided at the inlet 110 of the water flow channel. The adjusting ring 123 is installed in the water flow channel and its position within the water flow channel is adjustable. The adjusting ring 123 is connected to the valve plate 121 through the first elastic element 122. Under the action of the first elastic element 122, the valve plate 121 abuts against the stepped surface, thereby blocking the inlet 110. The closer the adjusting ring 123 is to the valve plate 121, the greater the compression of the first elastic element 122, and the greater the pressure difference required for the valve plate 121 to open. The linkage component changes the opening threshold of the inlet valve 120 by changing the position of the adjusting ring 123.

[0042] In this embodiment, the floating piston 240 and the negative pressure piston 230 are screwed together by two sleeves fitted around the central rod 220. The two sleeves are connected to the floating piston 240 and the negative pressure piston 230 respectively, and the two sleeves are located between the floating piston 240 and the negative pressure piston 230, so that the floating piston 240 is suspended above the negative pressure piston 230 in the initial state. When the volume of the air chamber increases, the floating piston 240 moves upward and rotates relative to the negative pressure piston 230. The linkage component uses mechanical transmission to transmit the rotation of the floating piston 240 to the adjusting ring 123, causing the adjusting ring 123 to move and change position. The greater the increase in the volume of the air chamber, the more rotations the floating piston 240 makes, and the smaller the initial distance between the adjusting ring 123 and the valve plate 121. Specifically, a gear ring is provided on the upper side of the floating piston 240. The linkage assembly includes a first gear 251, a second gear 252, a first rod 253, a second rod 254, and a rack 255. The rack 255 is fixedly connected to the adjusting ring 123 and parallel to the moving direction of the adjusting ring 123. The first gear 251 is coaxial with and fixedly connected to the first rod 253, and the first gear 251 meshes with the gear ring. The second gear 252 is coaxial with and fixedly connected to the second rod 254, and the second gear 252 meshes with the rack 255. The first rod 253 and the second rod 254 are both vertically arranged and are driven by a set of transmission gears. When the gear ring rotates with the floating piston 240, it drives the adjusting ring 123 to move in sequence through the first gear 251, the first rod 253, the transmission gears, the second rod 254, the second gear 252, and the rack 255, thereby changing the position of the adjusting ring 123.

[0043] In this embodiment, a locking member 260 is provided on the upper side of the negative pressure piston 230. In the working mode of the piston assembly, the locking member 260 restricts the relative rotation of the two sleeves, thereby restricting the movement of the floating piston 240, so that the adjusting ring 123 is kept in the adjusted position. Specifically, the locking member 260 is a telescopic cylinder. The output shaft of the telescopic cylinder passes through one of the sleeves. In the adjusting mode of the piston assembly, the output shaft of the telescopic cylinder does not contact the other sleeve. In the working mode of the piston assembly, the output shaft of the telescopic cylinder extends and abuts against the other sleeve, restricting the relative rotation of the two sleeves, thereby restricting the position of the adjusting ring 123 through the linkage component.

[0044] In this embodiment, a floating plate 160 is provided inside the water flow channel and below the piston assembly. The floating plate 160 moves upward as the liquid level in the water flow channel rises. When the piston assembly moves downward until the negative pressure piston 230 is in contact with the floating plate 160, the floating plate 160 blocks the air inlet. A vertical baffle is provided on the lower side of the floating plate 160. When the floating plate 160 floats on the water surface, a gap is reserved between the vertical baffle and the bottom wall of the water flow channel. Since air bubbles in the water will rise under negative pressure, this arrangement allows the water flow in the lower part of the water flow channel to pass through first and flow towards the monitoring mechanism 300, preventing water containing air bubbles in the upper part of the water flow from passing through first.

[0045] In this embodiment, the monitoring mechanism 300 includes a detection head 310, a pressurizing piston 320, a second elastic element 330, and a detection cylinder 340. The detection cylinder 340 is fixed inside the housing 100, with its upper end sealed and its lower end connected to the water flow channel. The detection cylinder 340 is located between the water inlet valve 130 and the outlet 150. The detection head 310 is installed inside the water flow channel and located below the detection cylinder 340. The pressurizing piston 320 is slidably installed inside the detection cylinder 340 and connected to the detection cylinder 340 through the second elastic element 330, used to pressurize the water flow flowing to the bottom of the detection cylinder 340. A solenoid valve 140 is installed at the outlet 150. The solenoid valve 140 opens after the detection head 310 completes the detection, allowing water in the water flow channel to flow out. Specifically, the section between the water valve 130 and the solenoid valve 140 in the water flow channel is the detection section. After the water flows into the detection section, since the solenoid valve 140 is in the closed state, the continuously flowing water will push the pressurizing piston 320 upward. The pressurizing piston 320 compresses the second elastic element 330 to store force, so that the pressurizing piston 320 always exerts positive pressure on the water flow, causing the residual air bubbles in the water to disperse and dissolve. The solenoid valve 140 can be opened and closed intermittently according to the water flow conditions in the water flow channel, which can both ensure that the pressurizing piston 320 pressurizes the water flow to disperse the residual air bubbles in the water and allow the water to be discharged smoothly.

[0046] In some other embodiments, such as Figure 5 and Figure 6As shown, the adjusting ring 123 is driven to move by a power component 124, which can be a pneumatic cylinder or a hydraulic cylinder. The linkage assembly includes a displacement sensor 271 and a central control module (not shown in the figure). The displacement sensor 271 is located above the negative pressure piston 230 and is used to monitor the distance the floating piston 240 moves relative to the negative pressure piston 230, and feeds this information back to the central control module. The central control module controls the distance the power component 124 drives the adjusting ring 123 to move based on the displacement of the floating piston 240. The greater the distance the floating piston 240 moves relative to the negative pressure piston 230, the greater the distance the power component 124 drives the adjusting ring 123 to move closer to the valve plate 121. The floating piston 240 can abut against the negative pressure piston 230 through a sleeve located below it, thus suspending it above the negative pressure piston 230. When the piston assembly switches to the working mode, the central control module can disconnect the linkage between the displacement sensor 271 and the power component 124, so that the adjusting ring 123 remains in the adjusted position. The central control module can be a PLC program module from the existing technology. This invention utilizes its control function to achieve simple linkage, and its specific principle will not be elaborated.

[0047] Before use, the online intelligent monitoring device for aquatic environment water quality of the present invention first introduces the water to be monitored into the water flow channel, or only introduces water into the defoaming section, and closes the inlet 110 and outlet 150, closes the air outlet to seal the air chamber, and the piston assembly is in adjustment mode. When the central rod 220 drives the negative pressure piston 230 and the floating piston 240 to move upward synchronously, the negative pressure piston 230 draws the water flow channel to make the defoaming section of the water flow channel negative pressure, so that the bubbles in the water in the defoaming section are released. When the central rod 220 drives the negative pressure piston 230 to move downward, the gas released in the water flow channel enters the air chamber, so that the volume of the air chamber increases. The piston assembly can move up and down repeatedly, so that the bubbles in the water are completely released. When the volume of the air chamber increases, the position of the adjusting ring 123 is changed through the linkage component, causing the adjusting ring 123 to move closer to the valve plate 121, increasing the opening threshold of the inlet valve 120. The greater the increase in the volume of the air chamber, the more air bubbles are present in the water being tested. By increasing the opening threshold of the inlet valve 120, the pressure difference required for water to enter the water flow channel increases. This results in a greater absolute value of the negative pressure in the water flow channel when the piston assembly moves upward, ensuring that air bubbles in the water flow are completely expelled before entering the new water flow. After the opening threshold is adjusted, the inlet 110 and outlet 150 are opened, and the air outlet is opened to connect the air chamber to the outside. The piston assembly switches to the working mode. When the piston assembly moves upward, it draws the defoaming section to a negative pressure, causing the air bubbles in the water to burst and precipitate. When the absolute value of the negative pressure in the defoaming section increases to reach the opening threshold of the inlet valve 120, the inlet valve 120 opens. Air bubbles in the newly entering water flow are expelled under the negative pressure in the defoaming section. Afterward, the piston assembly moves downward, allowing the expelled gas to be discharged through the air chamber. When the negative pressure piston 230 is in contact with the floating plate 160, the floating plate 160 blocks the air inlet. The piston assembly continues to move downwards, squeezing the water flow in the defoaming section through the water valve 130 to the detection section. As the water flows into the detection section, and the solenoid valve 140 is closed, the continuously flowing water pushes the pressure piston 320 upwards. The pressure piston 320 compresses the second elastic element 330, storing pressure, ensuring that the pressure piston 320 always exerts positive pressure on the water flow, causing residual bubbles in the water to disperse and dissolve. The detection head 310 monitors the water quality. When the solenoid valve 140 switches to the open state, the water in the detection section is discharged from the outlet 150. The solenoid valve 140 can open and close at a certain frequency.

[0048] An embodiment of the online intelligent monitoring method for aquatic environment water quality according to the present invention, utilizing the above-mentioned online intelligent monitoring device for aquatic environment water quality, includes the following steps:

[0049] S10, fill the water to be tested into the water flow channel in advance, and seal the inlet 110 and outlet 150;

[0050] S20 puts the piston assembly in adjustment mode, and the piston assembly moves up and down repeatedly, without extending into the lower side of the water surface when moving downward.

[0051] S30, the linkage component adjusts the opening threshold of the water inlet valve 120 according to the volume change of the air chamber;

[0052] S40, open the inlet 110 and outlet 150 to switch the piston assembly to the working mode;

[0053] S50, the piston assembly moves up and down reciprocally, and when it moves upward, it draws water into the water flow channel to create a negative pressure, and when it moves downward, it allows the gas in the water flow to enter the air chamber and push the water flow towards the monitoring mechanism 300.

[0054] S60, the water flows through the monitoring agency 300 and is discharged from the outlet 150.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online intelligent monitoring device for aquatic environment water quality, characterized in that: Includes the housing, defoaming mechanism, monitoring mechanism, and linkage components; The shell has an inlet and an outlet, and the shell has a water flow channel inside that allows water to flow unidirectionally from the inlet to the outlet. An inlet valve is installed at the inlet. The opening threshold of the inlet valve is adjustable. The opening threshold is the pressure difference between the inlet side of the inlet valve and the water flow channel. The defoaming mechanism and the monitoring mechanism are located upstream and downstream of the water flow channel, respectively. The defoaming mechanism includes a negative pressure cylinder installed in the housing and a piston assembly installed in the negative pressure cylinder. The negative pressure cylinder is located above the water flow channel and is connected to the water flow channel. An air chamber is installed in the piston assembly, and the lower end of the air chamber is unidirectionally connected to the water flow channel. The piston assembly has an adjustment mode and a working mode. In the adjustment mode, the volume of the air chamber is variable. When the piston assembly moves upward, it draws the water flow channel to negative pressure. When it moves downward, it allows the gas in the water flow channel to enter the air chamber. The change in the volume of the air chamber is fed back to the water inlet valve through the linkage component, adjusting the opening threshold of the water inlet valve to be positively correlated with the volume of the air chamber. In the working mode, the upper end of the air chamber is connected to the outside. When the piston assembly moves upward, it draws the water flow channel to negative pressure, causing the water inlet valve to open. Water flows from the inlet into the water flow channel. When the piston assembly moves downward, it pressurizes the water flow channel and allows the gas in the water flow channel to enter the air chamber. The liquid in the water flow channel flows to the monitoring mechanism. Monitoring agencies are used to monitor water quality; The piston assembly includes a central rod, a negative pressure piston, and a floating piston. The central rod is vertically positioned and can move up and down relative to the negative pressure cylinder. The negative pressure piston is installed at the lower end of the central rod and slides and seals against the inner wall of the negative pressure cylinder. The floating piston is sleeved outside the central rod and slides and seals against the inner wall of the negative pressure cylinder. The floating piston is located above the negative pressure piston and defines the air chamber between the negative pressure piston and the inner wall of the negative pressure cylinder. When the volume of the air chamber increases, the floating piston moves upward relative to the negative pressure piston. The negative pressure piston has an air inlet that connects the air chamber and the water flow channel, and an air inlet valve is installed at the air inlet. The floating piston has an air outlet that connects the air chamber and the outside, and an opening and closing valve is installed at the air outlet. In the adjustment mode, the air outlet of the piston assembly is closed; in the working mode, the air outlet is open. When the central rod drives the negative pressure piston to move upward, the air inlet is closed; when the central rod drives the negative pressure piston to move downward, the air inlet is open. A floating plate is installed inside the water flow channel and below the piston assembly. The floating plate moves upward as the liquid level in the water flow channel rises. When the piston assembly moves downward and the negative pressure piston comes into contact with the floating plate, the floating plate blocks the air inlet.

2. The online intelligent monitoring device for aquatic environment water quality according to claim 1, characterized in that: A water passage valve is installed inside the water flow channel and between the defoaming mechanism and the monitoring mechanism. The water passage valve opens when the piston assembly moves downward and squeezes the water flow channel to a preset degree, and closes when the piston assembly moves upward.

3. The online intelligent monitoring device for aquatic environment water quality according to claim 1, characterized in that: The inlet valve includes a valve plate, a first elastic element, and an adjusting ring. A stepped surface is provided at the inlet of the water flow channel. The adjusting ring is installed in the water flow channel and its position within the water flow channel is adjustable. The adjusting ring is connected to the valve plate through the first elastic element. Under the action of the first elastic element, the valve plate abuts against the stepped surface, thereby blocking the inlet. The closer the adjusting ring is to the valve plate, the greater the compression of the first elastic element, and the greater the pressure difference required for the valve plate to open. The linkage component changes the opening threshold of the inlet valve by changing the position of the adjusting ring.

4. The online intelligent monitoring device for aquatic environment water quality according to claim 3, characterized in that: The floating piston and the negative pressure piston are screwed together by two sleeves fitted outside the central rod. The two sleeves are connected to the floating piston and the negative pressure piston respectively. When the volume of the air chamber increases, the floating piston moves upward and rotates relative to the negative pressure piston. The linkage component uses mechanical transmission to transmit the rotation of the floating piston to the adjusting ring, so that the adjusting ring moves and changes position. The more the volume of the air chamber increases, the more rotations the floating piston makes, and the smaller the initial distance between the adjusting ring and the valve plate.

5. The online intelligent monitoring device for aquatic environment water quality according to claim 4, characterized in that: A locking element is provided on the upper side of the negative pressure piston. In the working mode, the locking element restricts the relative rotation of the two sleeves, thereby restricting the movement of the floating piston and keeping the adjusting ring in the adjusted position.

6. The online intelligent monitoring device for aquatic environment water quality according to claim 3, characterized in that: The regulating ring is driven to move by a power component. The linkage components include a displacement sensor and a central control module. The displacement sensor is set on the upper side of the negative pressure piston to monitor the distance the floating piston moves relative to the negative pressure piston and feeds it back to the central control module. The central control module controls the distance the power component drives the regulating ring to move based on the displacement of the floating piston. The greater the distance the floating piston moves relative to the negative pressure piston, the greater the distance the power component drives the regulating ring to move closer to the valve plate.

7. The online intelligent monitoring device for aquatic environment water quality according to claim 2, characterized in that: The monitoring mechanism includes a detection head, a pressurizing piston, a second elastic element, and a detection cylinder. The detection cylinder is fixed inside the housing, with its upper end sealed and its lower end connected to the water flow channel. The detection cylinder is located between the water inlet valve and the outlet. The detection head is installed inside the water flow channel and is located below the detection cylinder. The pressurizing piston is slidably installed inside the detection cylinder and connected to the detection cylinder through the second elastic element, and is used to pressurize the water flow flowing to the bottom of the detection cylinder. A solenoid valve is installed at the water outlet. The solenoid valve opens after the detection head completes the detection, allowing water to flow out of the water channel.

8. A method for online intelligent monitoring of aquatic environment water quality, utilizing the online intelligent monitoring device for aquatic environment water quality as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S10, the water to be tested is pre-filled into the water flow channel, and the inlet and outlet are sealed; S20 puts the piston assembly in adjustment mode, and the piston assembly moves up and down repeatedly, without extending into the lower side of the water surface when moving downward. S30, the linkage component adjusts the opening threshold of the water inlet valve according to the volume change of the air chamber; S40, open the inlet and outlet to switch the piston assembly to the working mode; S50, the piston assembly moves up and down reciprocally, and when it moves upward, it draws water into the water flow channel to create a negative pressure, and when it moves downward, it allows the gas in the water flow to enter the air chamber and push the water flow towards the monitoring mechanism. S60, water flows out of the outlet after being monitored by the monitoring agency.

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