Unpowered convection intensified pH measuring device

Abstract

The invention provides an unpowered convection intensified pH measurement device, which comprises a detection probe, a water flow sensor and a water flow sensor, the hard cable is electrically connected with the detection probe and is used for transmitting measurement data to external equipment; and the floating body is connected with the hard cable through a fixed point, so that the detection probe shakes up and down along with water flow to avoid dirt hanging and slow down the growth of the biological membrane. And the up-and-down shaking of the detection probe can replace a front-end stirring structure of a traditional detection probe, so that the mass transfer efficiency of the detection probe is enhanced. The direct influence of pollutants on a probe electrode is reduced through the protective grating on the detection probe, and the detachable design is adopted to facilitate replacement of gratings with different porosities, so that the formation of a biological membrane and the accumulation of the pollutants can be effectively prevented, and the precision of water quality parameter measurement is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water monitoring equipment, and in particular to an unpowered convection-enhanced pH measurement device. Background Art

[0002] As an important part of urban infrastructure, urban drainage pipe networks undertake the key tasks of transporting sewage and discharging rainwater, and play a vital role in maintaining urban environmental sanitation and public health. Its effective operation helps prevent urban waterlogging, protect the quality of the water environment, and promote the sustainable development of cities. However, since drainage pipe networks are usually located deep underground and have complex environmental conditions, problems such as damage, blockage, or mixed connection of rainwater and sewage in the pipe networks are difficult to detect and repair in a timely manner.

[0003] Water body detection devices in the prior art face significant challenges in urban drainage network monitoring, especially the problem of pollutant attachment. These pollutants will not only directly affect the measurement accuracy of the probe electrode, but may also accelerate the formation of biofilm, seriously affecting the long-term stability and reliability of the monitoring equipment. Pollutant attachment leads to a decline in probe performance, requiring frequent manual cleaning or replacement, which not only increases maintenance costs but also reduces monitoring efficiency. Further, when it comes to the field of pH value monitoring, the traditional monitoring process requires the installation of an agitator at the head of the device to speed up the material exchange between the probe and the solution, so that the probe responds faster to changes in the hydrogen ion concentration in the solution, thereby shortening the time to reach a stable reading; and in this way, it helps prevent these substances from adhering to the probe, eliminates bubbles attached to the probe and ensures good contact between the probe and the solution. However, due to the pollution situation of the sewage network and the limitation of battery power supply, the pH monitoring of sewage pipes is mostly carried out for pump stations and storage tanks with better working environments, and the traditional municipal pipeline and inspection well water quality pH index detection work still has great limitations. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a non-powered convection enhanced pH measurement device, which aims to solve the problems of pH probe contamination and weak water exchange in sewage environment, so as to meet the special monitoring needs of urban drainage pipe networks.

[0005] The present disclosure provides a non-powered convection enhanced pH measurement device, comprising: a detection probe for measuring the pH value of a water body;

[0006] a hard cable, electrically connected to the detection probe, for transmitting measurement data to an external device;

[0007] A floating body is connected to the hard cable through a fixed point so that the detection probe is maintained at a predetermined depth in the water body.

[0008] In one embodiment of the present disclosure, the probe comprises:

[0009] The probe electrode is used to directly contact the water body and measure specific water quality parameters; the protective grid is arranged on the periphery of the probe electrode to reduce the contact between pollutants and the probe electrode;

[0010] The force-bearing component is fixedly connected to the hard cable and is used to withstand the impact force of the water flow on the probe electrode; and the mass of the force-bearing component is greater than the sum of the masses of the probe electrode and the protective grid.

[0011] In one embodiment of the present disclosure, the protective grille is longer at the top and shorter at the bottom, so as to reduce bubbles generated during the upward movement of the detection probe.

[0012] In one embodiment of the present disclosure, the protective grille is designed to be detachable so that grilles with different porosities can be replaced according to different water quality conditions.

[0013] In one embodiment of the present disclosure, the unpowered convection enhanced pH measurement device further includes an enhanced fin, which is sleeved on the force-bearing component, forms a certain angle with the working water surface of the equipment, and is located behind the probe electrode.

[0014] In one embodiment of the present disclosure, the reinforcing fins are designed to be replaceable, so that fins of different shapes or sizes can be replaced according to different water quality conditions.

[0015] In one embodiment of the present disclosure, the unpowered convection enhanced pH measurement device also includes an elastic single-arm guide rod, one end of which is connected to the hard cable, and the other end is connected to the float; the elastic single-arm guide rod is deformed under the action of water flow, and the direction of the arc after deformation points to the direction of flow velocity, so as to drive the probe electrode to vibrate to remove pollutants.

[0016] In one embodiment of the present disclosure, the elastic single-arm guide rod is equipped with a built-in sensor for monitoring the deformation state and vibration frequency of the elastic single-arm guide rod to evaluate the cleanliness state of the probe electrode.

[0017] In one embodiment of the present disclosure, the floating body is a U-shaped structure, and the detection probe is arranged in an opening area of ​​the U-shaped structure, and the overall center of gravity of the device falls within the opening area of ​​the U-shaped structure.

[0018] In one embodiment of the present disclosure, a reflective or luminous mark is provided on the surface of the floating body for positioning and identification in the water.

[0019] As described above, the unpowered convection enhanced pH measurement device provided in the embodiments of the present disclosure has at least the following technical effects:

[0020] (1) By configuring a protective grid to reduce the direct impact of pollutants on the probe electrode, and adopting a detachable design to replace grids with different porosities, the formation of biofilm and the accumulation of pollutants can be effectively prevented. The grid is longer at the top and shorter at the bottom, which can effectively prevent the probe from being contaminated in the downstream situation, reduce the contact between pollutants and the probe electrode, and reduce the bubbles generated during the upward movement of the probe, thereby improving the accuracy of water quality parameter measurement and the reliability of the monitoring system.

[0021] (2) The elastic single-arm guide rod adopts a single-arm design, and the arc direction points to the direction of flow velocity, which can effectively prevent dirt from hanging. The setting of the elastic single-arm guide rod uses the power of water flow to push the reinforcing fins. At this time, the reinforcing fins drive the elastic single-arm guide rod to push diagonally forward, and the reinforcing fins gradually leave the water. The thrust gradually weakens, and the reinforcing fins gradually enter the water. The reciprocating action realizes the automatic vibration of the probe electrode, which helps to remove attached pollutants. During the shaking process, the probe is always underwater. At the same time, with the beveled grid, the water flow around the probe can be effectively enhanced during the up and down oscillation process, and the surrounding mass transfer effect can be enhanced, thereby improving the water quality monitoring sensitivity of the probe.

[0022] (3) The replaceable design of the enhanced fins allows users to replace fins of different shapes or sizes and force-bearing components of different masses according to different water quality conditions and monitoring requirements, adjust their natural vibration frequency, and keep the probe underwater for most of the time during the oscillation process, thereby enhancing the adaptability of the equipment to diverse water environments. The mass of the force-bearing component is much greater than the sum of the masses of the detection probe, probe electrode, and protective grid. By adjusting the force-bearing component, the vibration frequency of the probe can be effectively adapted.

[0023] (4) The float adopts a U-shaped structure, which is unidirectional under the action of the flow field, can automatically adjust the opening direction, and prevent contamination. The probe is arranged in the opening area to provide a stable measurement environment. At the same time, the setting of reflective or luminous signs facilitates rapid positioning and identification in the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of an unpowered convection enhanced pH measurement device in one embodiment of the present disclosure is shown.

[0025] Figure 2 A schematic diagram showing the structure of a detection probe in an embodiment of the present disclosure is shown.

[0026] Figure 3 A top view of a non-powered convection enhanced pH measurement device according to an embodiment of the present disclosure is shown.

[0027] Figure 4 A schematic diagram showing the vibration of a detection probe in an embodiment of the present disclosure.

[0028] Component number description

[0029] Detection probe 1

[0030] Probe electrode 11

[0031] Protective grille 12

[0032] Stressed component 13

[0033] Hard Cable 2

[0034] Floating body 3

[0035] Strengthening fin 4

[0036] Elastic single arm guide rod 5 DETAILED DESCRIPTION

[0037] The following is an explanation of the embodiments of the present disclosure by specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the information disclosed by the present disclosure. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in the present disclosure can also be modified or changed in various ways according to different viewpoints and application modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0038] The following is a detailed description of the embodiments of the present disclosure with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in many different forms and is not limited to the embodiments described herein.

[0039] like Figure 1-3 As shown, a schematic diagram of the structure of the unpowered convection-enhanced pH measurement device disclosed in the present invention is shown, and the unpowered convection-enhanced pH measurement device includes: a detection probe 1, a hard cable 2, and a float 3.

[0040] The detection probe 1 is used to measure the pH value of water.

[0041] In some embodiments, Figure 2 As shown, the detection probe includes a probe electrode 11, a protection grid 12 and a force-bearing component 13, wherein:

[0042] The probe electrode 11 is used for directly contacting the water body and measuring the pH value of the water body.

[0043] Specifically, the probe electrode 11 is the core part of the probe, which is in direct contact with the water body and is responsible for measuring key water quality parameters. The electrode 11 is made of one or more special materials, which not only have excellent corrosion resistance and can resist chemical corrosion that may exist in sewage, but also ensure the accuracy of the measurement process and the long-term stability of the electrode. These special materials may include but are not limited to stainless steel, titanium, nickel-based alloys, polytetrafluoroethylene (PTFE), modified polyphenylene ether, polyvinylidene fluoride (PVDF), etc., all of which have stability and durability in specific chemical environments.

[0044] The design of the electrode 11 needs to take into account its sensitive surface in contact with the water body, which usually requires the electrode surface to be smooth and uniform to reduce the adhesion of biofilm and pollutants. In addition, the electrodes 11 are arranged side by side and point to the water surface at a certain angle to the water surface in normal conditions to optimize their contact with the water body and improve the sensitivity and accuracy of the measurement.

[0045] In order to further improve the performance and reliability of the probe electrode 11, some special treatments may be applied to or around the electrode surface, such as coating or surface modification techniques, which can provide additional protection and reduce the effects of corrosion and contamination. For example, polydimethylsiloxane (PDMS) is used to cover the electrode on the electrode, and a connection is established through a conductive material, while an insulator layer is covered on the conductive material to prevent the electrode from directly contacting the outside world.

[0046] The protection grid 12 is arranged on the periphery of the probe electrode 11. The protection grid 12 can be made of stable materials such as plastic, glass, ceramic, etc. The upper part of the protection grid 12 is longer and the lower part is shorter to reduce the bubbles generated during the upward movement of the probe. The external section of the protection grid 12 is basically flush with the horizontal. Even if there is dirt hanging, it can slide down by water flow impact or its own gravity to reduce the contact between the pollutants and the probe electrode 11. The protection grid 12 is designed to be detachable, so that grids with different porosities can be replaced according to different water quality conditions.

[0047] The force-bearing component 13 is fixedly connected to the hard cable 2 and is used to withstand the impact force of the water flow on the probe electrode 11 .

[0048] Specifically, the force-bearing component 13 is designed to be fixedly connected to the hard cable 2 and directly associated with the probe electrode 11. Its main function is to withstand the impact force and pressure generated by the water flow on the probe electrode 11, ensuring the stability of the probe electrode 11 and the accuracy of measurement. The design of the force-bearing component 13 takes into account the following features:

[0049] First, the mass of the stress-bearing component is much larger than the sum of the masses of the probe electrode and the protective grid; secondly, the stress-bearing component 13 is made of high-strength materials, such as stainless steel or high-grade engineering plastics, to ensure that the structural integrity can be maintained under the impact of strong water flow; the connection between the stress-bearing component 13 and the hard cable 2 adopts a firm mechanical lock to ensure that the connection will not loosen or be damaged during long-term operation; furthermore, considering the special environment of the urban sewer network, the surface of the stress-bearing component 13 may adopt a special anti-corrosion coating or be anodized to improve its durability and corrosion resistance; in addition, the design and connection method of the hard cable 2 and the elastic single-arm guide rod 5 take into account the application under different water flow conditions, can adapt to different hydrodynamic environments, and reduce vibration and fatigue damage caused by water flow.

[0050] The stress-bearing component is the center of the system, which ensures that during the overall lifting of the equipment, the probe can be facing downward and located in the middle of the U-shaped float, thus achieving better protection for the probe.

[0051] The hard cable 2 is electrically connected to the detection probe 1 and is used to transmit measurement data to an external device.

[0052] Specifically, the hard cable 2 is internally made of appropriate conductor materials. Considering the physical damage that the cable may encounter during installation and operation, the hard cable 2 is externally designed with an enhanced mechanical protection layer, which includes a metal or non-metallic braided layer, or a sturdy plastic sheath, to improve the wear resistance and impact resistance of the cable. In view of the fact that the working environment of the unpowered convection enhanced pH measuring device is usually underwater, the hard cable 2 adopts a hard waterproof shell. This design not only protects the conductor inside the cable from corrosion, but also ensures the stability and long-term reliability of the electrical connection. The outer sheath and sealing structure of the cable are made of corrosion-resistant materials, which can resist the erosion of the acidic or alkaline environment that may exist in the urban sewer network, thereby extending the service life of the cable. The hard waterproof shell can be made of hard stainless steel, and the whole is a hollow structure, but in order to further increase the elastic deformation capacity of the shell, its diameter should be controlled within 10mm, and the wall thickness should be controlled above 4mm, which is convenient for wiring at different monitoring points, while reducing stress and distortion during installation, and can support the probe to complete the up and down shaking decontamination operation.

[0053] The floating body 3 is connected to the hard cable 2 via a fixed point so that the detection probe 1 is maintained at a predetermined depth in the water body.

[0054] Specifically, the float 3 is mainly made of polystyrene foam, polyurethane foam or other lightweight and structurally sturdy materials. These materials not only provide the necessary buoyancy to support the weight of the probe and the cable, but also maintain its specific position on the water surface or in the water body, and provide greater buoyancy. The draft of the float 3 is less than the radius of the cylindrical section of the float 3, ensuring that the main floating garbage on the water surface can float under the float 3, reducing the risk of garbage hanging on the overall equipment. The overall width of the float 3 should be smaller than the radius of the sewage pipe to support the float 3 in some pipes with reciprocating flow. The U-shaped structure direction can be modified according to the impact of the water flow to avoid hanging garbage under countercurrent conditions.

[0055] The connection between the floating body 3 and the elastic single-arm guide rod 5 can be achieved by integrated molding or insertion. The elastic single-arm guide rod 5 drives the entire upper structure to vibrate up and down with the insertion point as the fulcrum.

[0056] In some embodiments, the float 3 is a U-shaped structure, and the detection probe 1 is disposed in an opening area of ​​the U-shaped structure.

[0057] Specifically, the detection probe 1 is arranged in a U-shaped float, and the probe is placed in its opening area so that the water flow can flow directly through the probe itself. This configuration not only facilitates the effective measurement of water quality parameters, but also takes into account the direction of the water flow. The opening of the U-shaped structure is set along the direction of the water flow, which can use the power of the natural water flow to effectively reduce the accumulation of pollutants on the detection probe 1. When pollutants move with the water flow, they are more likely to be carried away by the water flow rather than being hung on the probe. This design improves the efficiency and accuracy of water quality monitoring, while reducing the frequency of maintenance of the detection probe, ensuring continuous and stable water quality monitoring effects.

[0058] In some embodiments, the surface of the float 3 is provided with reflective or luminous markings for positioning and identification in the water.

[0059] Specifically, in order to improve the visibility of underwater equipment and facilitate maintenance personnel to locate and identify monitoring equipment on the water surface, the surface of the floating body 3 is provided with reflective or luminous markings.

[0060] In some embodiments, the hard cable 2 and the float 3 are connected by an elastic single-arm guide rod 5, that is, one end of the elastic single-arm guide rod 5 is connected to the hard cable 2, and the other end is connected to the float 3; the elastic single-arm guide rod 5 is deformed under the action of water flow, and the arc direction points in the direction of flow velocity, so as to drive the probe electrode 11 to shake up and down to remove pollutants and slow down the growth of biofilm.

[0061] Specifically, one end of the elastic single-arm guide rod 5 is connected to the corresponding part of the hard cable 2, which can be welded, snap-connected or other mechanical connection methods to ensure the firmness and reliability of the connection. The other end is connected to the float 3, usually located on the top or side of the float 3 to achieve the best torque distribution and vibration effect. The elastic single-arm guide rod 5 is made of a material with good elasticity and durability, such as spring steel, highly elastic polymer or other synthetic materials, which can produce stable deformation under the continuous action of water flow. The elastic single-arm guide rod 5 produces a predetermined deformation under the impact and pressure of the water flow. This deformation is designed to make the probe electrode 11 shake up and down, thereby helping to remove attached contaminants.

[0062] Furthermore, the detection probe vibrates up and down with the water flow, and water exchange around the probe can be achieved without a special water stirring structure, thereby enhancing the mass transfer efficiency of the detection probe.

[0063] In addition, the elastic coefficient of the elastic single-arm guide rod 5 can be adjusted according to different hydrodynamic conditions and pollutant loads to achieve optimal vibration frequency and amplitude.

[0064] Furthermore, the elastic single-arm guide rod 5 is equipped with a sensor for monitoring the deformation state and vibration frequency of the elastic single-arm guide rod 5 to evaluate the cleaning state of the probe electrode 11. This monitoring capability is crucial for evaluating the cleaning state of the probe electrode 11 because it can provide real-time feedback on contaminant hooking and subsequent cleaning effects.

[0065] In order to further reduce the accumulation of biofilm on the probe electrode 11 , in some embodiments, the unpowered convection enhanced pH measurement device further includes an enhanced fin 4 .

[0066] Specifically, the reinforcing fin 4 is sleeved on the force-bearing component 13 and arranged behind the probe electrode 11. Such a layout not only uses the natural impact force of the water flow to clean the probe electrode 11, but also significantly reduces the direct contact between the pollutants and the electrode, thereby protecting the electrode from being covered by the biofilm. The cross-sectional area of ​​the reinforcing fin 4 is larger than the cross-sectional area of ​​the probe electrode 11. This design increases the contact area between the water flow and the fin, so that under the action of the water flow, the fin can generate greater lift, effectively shaking off or reducing the biofilm accumulated on the probe electrode 11.

[0067] The cleaning effect is further enhanced by the replaceable design of the reinforced fins 4, which allows the user to replace fins of different shapes or sizes and force-bearing components of different masses according to different water quality conditions and monitoring requirements, adjust their natural vibration frequency, and enhance the adaptability of the equipment to diverse water environments.

[0068] Furthermore, the material used for the reinforced fin 4 has high corrosion resistance and contains anti-microbial adhesion properties, which enable the fin to maintain performance even in harsh underwater environments. Special treatment of the fin surface, such as coating or texturing, further enhances its anti-pollution performance and ensures long-term stable monitoring results.

[0069] In addition, the design of the enhanced fin 4 also takes into account the hydrodynamic effect. The fin is tilted in the direction of the water flow. When the water flows, the enhanced fin 4 drives the elastic single-arm guide rod 5 to push diagonally forward, the enhanced fin gradually leaves the water, the thrust gradually weakens, and the enhanced fin gradually enters the water, reciprocating. This vibration action is similar to shaking, which not only enhances the water flow exchange around the probe at low flow rates, but also can directly shake off attached dirt at high flow rates, thereby realizing a dynamic self-cleaning mechanism.

[0070] Furthermore, the vibration frequency is: f = 2π*(K / m) 0.5 ,

[0071] Wherein, K is the deformation coefficient of the vibrating body in the vertical direction of the reinforced fin, and the vibrating body is composed of a U-shaped floating body, an elastic single-arm guide rod, and a probe; m is the mass of the force-bearing component.

[0072] By changing the length of the elastic single-arm guide rod and the mass of the force-bearing component, f is controlled between 1 and 0.25 Hz.

[0073] In order to better illustrate the technical solution disclosed in this application, a complete application example is shown below.

[0074] The non-powered convection enhanced pH measuring device of the present invention is specially designed for urban sewer networks. The core component of the device includes a detection probe 1 that directly contacts the water body and measures the pH value of the key water quality parameter. The probe is electrically connected to the external data processing equipment through a hard cable 2 to ensure stable data transmission.

[0075] In order to ensure the stability and accuracy of the probe, the device is equipped with a U-shaped floating body 3, the probe is arranged in the opening area, and the reflective or luminous mark set on the surface makes it easy to locate and identify in the water. In addition, one end of the elastic single-arm guide rod 5 is connected to the hard cable 2, and the other end is connected to the floating body 3. Figure 4 As shown, a schematic diagram showing the vibration of the detection probe under the action of water is shown, and the natural power of the water flow is used to vibrate the probe electrode 11 to effectively remove pollutants. At the same time, the built-in sensor monitors the vibration state in real time to evaluate the cleanliness of the probe.

[0076] The force-bearing component 13 is fixedly connected to the hard cable 2 to withstand the impact of the water flow, and the design of the protective grid 12 reduces the direct contact between the pollutants and the probe electrode 11. The grid is detachable, allowing grids with different porosities to be replaced according to water quality conditions. The strengthening fin 4 is sleeved on the force-bearing component 13 and located behind the probe. Its larger cross-sectional area helps to reduce the accumulation of biofilm, and the fin is designed to be replaceable to adapt to different water quality conditions.

[0077] During use, the device is first deployed to a predetermined location in the city's sewer network, and the U-shaped float 3 is used to maintain the probe at the required depth. The probe measures water quality parameters in real time and transmits the data to an external device through a hard cable 2. The self-cleaning mechanism drives the probe to vibrate through the deformation of the elastic single-arm guide rod 5 to remove pollutants, while the protective grille 12 and the reinforcing fins 4 work together to reduce the impact of pollutants and biofilms. The external device receives and processes the data transmitted by the probe, and regularly checks and maintains the device status, and replaces the protective grille 12 and reinforcing fins 4 when necessary.

[0078] In summary, the present disclosure provides a non-powered convection enhanced pH measurement device, which mainly includes a detection probe, a hard cable and a U-shaped float. The probe is used to measure the pH value of the water body and transmit it to an external device through a hard cable. The U-shaped float design ensures that the probe is stable at a predetermined depth of the water body, and is equipped with a reflective or luminous mark to facilitate underwater positioning. The probe is equipped with a removable protective grille to reduce contact with pollutants, and rear-mounted strengthening fins to reduce biofilm accumulation. An elastic single-arm guide rod connects the hard cable and the float, and uses water flow power to achieve self-cleaning of the probe, and a built-in sensor monitors the cleaning effect. The device comprehensively considers water flow dynamics, achieves self-cleaning of the probe through the vibration of the elastic single-arm guide rod, reduces maintenance requirements, and improves monitoring efficiency. Its design provides an efficient and reliable water quality monitoring solution for urban sewer networks.

[0079] The above embodiments are merely illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present disclosure shall still be covered by the claims of the present disclosure.

Claims

1. A non-powered convection enhanced pH measurement device, characterized in that: include: Detection probe, used to measure the pH value of water; a hard cable, electrically connected to the detection probe, for transmitting measurement data to an external device; The float is connected to the hard cable through a fixed point, so that the detection probe can shake up and down with the water flow to avoid being contaminated, slow down the growth of biofilm, and enhance the stirring effect of the water body.

2. The unpowered convection enhanced pH measuring device according to claim 1, characterized in that: The probe comprises: Probe electrode, used to directly contact with water and measure the pH value of water; A protective grid is arranged at the periphery of the probe electrode to reduce the contact between the pollutants and the probe electrode; The force-bearing component is fixedly connected to the hard cable and is used to withstand the impact force of the water flow on the probe electrode; and the mass of the force-bearing component is greater than the sum of the masses of the probe electrode and the protective grid.

3. The unpowered convection enhanced pH measurement device according to claim 1, characterized in that: The protective grille is longer at the top and shorter at the bottom, and is used to reduce bubbles generated during the upward movement of the detection probe.

4. The unpowered convection enhanced pH measuring device according to claim 2, characterized in that: The protective grille is designed to be detachable, so that grilles with different porosities can be replaced according to different water quality conditions.

5. The unpowered convection enhanced pH measurement device according to claim 2, characterized in that: Also includes reinforced fins, The reinforcing fin is sleeved on the force-bearing component, forms a certain angle with the working water surface, and is located behind the probe electrode.

6. The unpowered convection enhanced pH measuring device according to claim 5, wherein the enhanced fins are designed to be replaceable so as to facilitate replacement of fins of different shapes or sizes according to different water quality conditions.

7. The unpowered convection enhanced pH measurement device according to claim 1, characterized in that: Also includes an elastic single-arm guide rod, One end of the elastic single-arm guide rod is connected to the hard cable, and the other end is connected to the floating body; The elastic single-arm guide rod is deformed under the action of water flow, and the arc direction after deformation points to the flow velocity direction, so as to drive the probe electrode to vibrate and remove pollutants.

8. The unpowered convection enhanced pH measurement device according to claim 1, characterized in that: The floating body is a U-shaped structure, and the detection probe is arranged in the opening area of ​​the U-shaped structure.

9. The unpowered convection enhanced pH measurement device according to claim 1, characterized in that: The surface of the floating body is provided with a reflective or luminous mark for positioning and identification in the water body.

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