CN217930367U - Water quality monitoring device - Google Patents

Abstract

A water quality monitoring device is provided. The water quality monitoring device comprises a first probe and a second probe. The first probe is used for detecting the ammonia nitrogen concentration of the liquid to be detected and comprises a conversion module and a test module. The conversion module comprises a conversion bin and a conversion assembly, the conversion bin is used for containing the liquid to be detected, and the conversion assembly is used for converting ammonium ions in the liquid to be detected into ammonia gas. The test module comprises a test chamber, intermediary liquid and a sensor, wherein the intermediary liquid and the sensor are positioned in the test chamber, and the test chamber is communicated with the conversion chamber through a hydrophobic membrane. The ammonia gas can pass through the hydrophobic membrane to react with the medium liquid, and the sensor is used for detecting the performance parameters of the medium liquid so as to obtain the concentration of ammonium ions in the medium liquid. The second probe is used for detecting other parameters of reaction water quality information different from ammonia nitrogen concentration. Like this, water quality monitoring device can be applicable to the normal position and detect, and water quality monitoring device's detection mode is environmental protection more, and water quality monitoring device can have less volume.

Description

Water quality monitoring device

Technical Field

The application relates to the technical field of water quality monitoring, and more particularly relates to a water quality monitoring device.

Background

The method has the advantages that the pollution prevention and protection work of key watersheds, water areas and drinking water sources is carried out, the adjustment of urban industrial structures, the relocation of polluted enterprises and the sewage discharge treatment of enterprises are enhanced, the comprehensive improvement of urban river channel environments is enhanced, the water quality condition of water source protection areas is further improved, the environmental quality and the safety of drinking water sources are ensured, and the method is a first-class matter related to the livelihood. And if the wastewater rich in ammonia nitrogen is directly discharged, the wastewater pollutes rivers, and aquatic plants such as algae grow crazy. This not only influences the river course, but also can crowd the living space who occupies other aquatic species, destroys ecological balance.

For detecting the content of nitrogen elements in the water body, an ammonia nitrogen probe is generally used for detection. The working principle of the existing online ammonia nitrogen probe is mainly based on the following two typical detection methods:

the first method is mainly based on the ammonia nitrogen detection method of national standard (HJ 536-2009) to carry out measurement. The method mixes the sample to be analyzed and the reaction reagent to obtain the ammonium ions in the solution

Conversion to ammonia (NH) ₃ ) Ammonia gas is released from the sample being analyzed. The ammonia gas is then transferred to a measuring cell containing the indicator, causing the ammonia gas to re-dissolve in the indicator. The reactions cause the color of the solution to change, so that the ammonia nitrogen detection probe can measure a sample by using a colorimetric method, and the concentration value of ammonia nitrogen is obtained.

The second method is the ammonia gas-sensitive electrode method. The method also requires the addition of certain reagents to convert the ammonium ions to ammonia gas. The free ammonia gas penetrates through a semi-permeable membrane to enter the interior of the ion electrode and change the pH value of electrolyte in the electrode. The change amount of the pH value is in linear relation with the concentration of the ammonia gas, and the pH value can be converted into the ammonia nitrogen concentration by a user.

However, both methods are similar to the shore station test method, and a considerable amount of reagent or indicator needs to be added during detection to meet the requirements of test optical path, color development and the like. The added reagent or indicator can pollute the water body and change some characteristics of the water body. The change of the water body characteristics can affect other probes on the water quality detection device, so that the water quality detection device is difficult to carry out in-situ detection on the water body.

SUMMERY OF THE UTILITY MODEL

The present application has been made in view of the state of the art described above. It is an object of the present application to provide a water quality monitoring device that overcomes at least one of the disadvantages described in the background above.

In order to achieve the above object, the present application adopts the following technical solutions.

The application provides a following water quality monitoring device, this water quality monitoring device includes: the first probe is used for detecting the ammonia nitrogen concentration of a liquid to be detected, the first probe comprises a conversion module and a test module, the conversion module comprises a conversion bin and a conversion assembly, the conversion bin is used for containing the liquid to be detected, the conversion assembly is positioned in the conversion bin, the conversion assembly is used for converting ammonium ions in the liquid to be detected into ammonia gas, the conversion assembly is an electrolytic assembly or a photolysis assembly, the electrolytic assembly comprises a cathode electrode and an anode electrode, the photolysis assembly comprises a photolysis catalyst and a light source, the test module comprises a test bin, an intermediate liquid and a sensor, the intermediate liquid and the sensor are positioned in the test bin, the test bin is communicated with the conversion bin through a hydrophobic film, the ammonia gas can pass through the hydrophobic film to react with the intermediate liquid, and the sensor is used for detecting performance parameters of the intermediate liquid to obtain the ammonium ion concentration in the intermediate liquid; and the second probe is used for detecting parameters of other reaction water quality information different from the ammonia nitrogen concentration.

In an optional scheme, the first probe further comprises a circulation module, the circulation module comprises a liquid storage bin and a circulation pump, the intermediate liquid is located inside the liquid storage bin, the test bin, the liquid storage bin and the circulation pump are connected in series to form a closed flow path, the circulation pump drives the intermediate liquid to flow along the closed flow path, so that the intermediate liquid in the liquid storage bin is interacted with the intermediate liquid in the test bin, or the first probe further comprises a circulation module, the circulation module comprises a liquid storage bin, a sleeve and a piston, the intermediate liquid is located inside the liquid storage bin, the test bin and the liquid storage bin are communicated with one end of the sleeve, the sleeve is sleeved on the piston, when the piston moves between one end and the other end of the sleeve in a reciprocating mode, the intermediate liquid in the liquid storage bin is interacted with the intermediate liquid in the test bin, or the first probe further comprises a circulation module, the circulation module comprises a circulation pipeline and a circulation pump, the intermediate liquid is located inside the circulation pipeline, the test bin, the circulation pipeline and the circulation pump form a closed flow path, and the intermediate liquid in the circulation pump flows along the closed flow path, so that the intermediate liquid in the test bin and the circulation pump interact with the intermediate liquid in the circulation pump.

In another alternative, the conversion assembly is an electrolytic assembly, the cathode electrode has a sheet structure, the anode electrode has a ring structure, the anode electrode is sleeved outside the cathode electrode, and the axial direction of the anode electrode is perpendicular to the cathode electrode.

In another alternative, the cathode electrode and the hydrophobic membrane are arranged parallel to each other, and the distance between the cathode electrode and the hydrophobic membrane is greater than or equal to the distance between the anode electrode and the hydrophobic membrane.

In another alternative, the sensor comprises one of the following sensors: an electrode type conductivity sensor including a conductivity electrode to detect conductivity of the mediating liquid; an inductive conductivity sensor comprising an excitation coil and an induction coil to detect the conductivity of the mediating fluid; a pH sensor including a pH electrode to detect a pH value of the intermediary fluid; and a capacitive sensor comprising a parallel plate capacitor to detect the relative permittivity of the intermediary liquid.

In another optional scheme, the first probe further comprises a sample changing module, the sample changing module comprises a sample changing pump, an input end of the sample changing pump is communicated with the conversion bin, and an output end of the sample changing pump is communicated with the outside of the first probe.

In another optional scheme, the sample changing pump is a diaphragm pump and is located outside the conversion bin, or the sample changing pump is a submersible pump, the whole sample changing pump is located inside the conversion bin, and the conversion bin is communicated with the atmosphere.

In another alternative, the conversion cartridge communicates with the exterior of the first probe through a filter membrane.

In another alternative, the second probe head includes at least one of a spectral sensor, a gas sensor, a flow rate sensor, an acceleration sensor, and an image sensor.

In another alternative, a cleaning brush is also included, the cleaning brush being movable to clean the first probe and/or the second probe.

By adopting the technical scheme, the conversion module can convert ammonium ions in the liquid to be detected into ammonia gas in an electrolysis or photolysis mode under the condition that no reagent is added to the liquid to be detected. The characteristic of the liquid to be detected can not be changed by the reagent, so that the detection result of the second probe can not be influenced by the first probe, and the water quality monitoring device can be suitable for in-situ detection. The liquid to be detected can not be polluted by the reagent, so that the detection mode of the water quality monitoring device is more environment-friendly, and the detection accuracy is improved. Furthermore, the first probe does not need to reserve a storage space for the reagent, enabling the first probe to have a smaller volume.

Drawings

Fig. 1 shows a perspective view of a water quality monitoring device according to a first embodiment of the present application.

Fig. 2 shows a front view of the water quality monitoring apparatus of fig. 1.

Fig. 3 shows a bottom view of the water quality monitoring apparatus of fig. 1.

Fig. 4 shows a front view of a first probe of the water quality monitoring device of fig. 1.

Fig. 5 shows a left side view of the first probe of the water quality monitoring device in fig. 1, with the first probe sectioned.

Fig. 6 shows a right side view of the first probe of the water quality monitoring device of fig. 1, with the first probe cut away and with parts of the assembly omitted.

Fig. 7 shows a perspective view of the first probe of the water quality monitoring device of fig. 1, with the first probe cut away and with parts of the assembly omitted.

Fig. 8 shows a schematic structural diagram of a first probe of the water quality monitoring device in fig. 1.

Fig. 9 to 11 show schematic views of the pump mount of the first probe of fig. 5 to 8.

Figure 12 shows a cross-sectional view of the pump mount of the first probe of figures 5 to 8.

FIG. 13 shows a perspective view of the electrolytic assembly of the first probe of FIG. 8.

FIG. 14 shows a schematic diagram of the electrolytic assembly of the first probe of FIG. 8.

Figure 15 shows a schematic diagram of the sensor of the first probe of figures 5 to 8.

Fig. 16 shows a schematic diagram of the photolysis assembly of the first probe of the water quality monitoring device according to the second embodiment of the application.

Figure 17 shows a perspective view of an electrolytic assembly of a water quality monitoring apparatus according to a third embodiment of the present application.

Fig. 18 shows a perspective view of an electrolytic assembly of a water quality monitoring apparatus according to a fourth embodiment of the present application.

Figure 19 shows a perspective view of an electrolytic assembly of a water quality monitoring apparatus according to a fifth embodiment of the present application.

Fig. 20 shows a perspective view of an electrolytic assembly of a water quality monitoring apparatus according to a sixth embodiment of the present application.

Fig. 21 shows a schematic configuration diagram of a water quality monitoring apparatus according to a seventh embodiment of the present application.

Figure 22 shows a schematic diagram of a circulation module of a water quality monitoring device according to an eighth embodiment of the present application.

Fig. 23 shows a schematic diagram of a sample change module of a water quality monitoring device according to a ninth embodiment of the present application.

Description of the reference numerals

1 a communication component;

2, a power supply assembly;

3, mounting a disc; 31, a mounting position;

4, cleaning brush;

5 a first probe;

a 51 conversion module; 511 a conversion bin; 512 a filter membrane; 513 a cathode electrode; 514 an anode electrode; 515 photolysis catalyst; 516 a light source; 517 an exhaust pipe;

52 a test module; 521, testing the bin; 522 a first hydrophobic membrane; a 523 sensor; 524 a back plate; 525 a conductivity electrode; 526 a capacitive electrode; 527 an insulating layer;

53a cycle module; 531 a liquid storage bin; 532 of sealing plug; 533 a liquid inlet; 534 a second hydrophobic membrane; 535 a mixing bin; 536 a circulating pump storage bin; 537 pump seat; 538 a first channel; 539 second pass; 53a circulation pump; 53b a sleeve; a 53c piston; 53d electric push rod; a 53e circulation line; 53f upstream portion; 53g downstream portion; 53h first valve body; 53i second valve body;

54 a sample changing module; 541 a sample changing pump storage bin; 542 a sample changing pump;

55 a control module;

6 second probe.

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that the detailed description is only intended to teach one skilled in the art how to practice the present application, and is not intended to be exhaustive or to limit the scope of the application.

The application provides a water quality monitoring device, include: the first probe is used for detecting the ammonia nitrogen concentration of the liquid to be detected, the first probe comprises a conversion module and a test module, the conversion module comprises a conversion bin and a conversion assembly, the conversion bin is used for containing the liquid to be detected, the conversion assembly is positioned inside the conversion bin, the conversion assembly is used for converting ammonium ions in the liquid to be detected into ammonia gas, the conversion assembly is an electrolytic assembly or a photolysis assembly, the electrolytic assembly comprises a cathode electrode and an anode electrode, the photolysis assembly comprises a photolysis catalyst and a light source, the test module comprises a test bin, mediating liquid and a sensor, the mediating liquid and the sensor are positioned inside the test bin, the test bin is communicated with the conversion bin through a hydrophobic film, the ammonia gas can pass through the hydrophobic film to react with the mediating liquid, and the sensor is used for detecting performance parameters of the mediating liquid so as to obtain the ammonium ion concentration in the mediating liquid; and the second probe is used for detecting other parameters of reaction water quality information different from the ammonia nitrogen concentration.

In this application, "alternating" means, unless otherwise specified, that the intermediate fluid in the test chamber is mixed with the intermediate fluid in the reservoir or circulation line.

(first embodiment)

Fig. 1 to 15 show a water quality monitoring device according to a first embodiment of the present application, in particular, a water quality monitoring device suitable for in-situ detection.

Referring to fig. 1 to 3, the water quality detecting apparatus may include a housing (not shown), a communication module 1, a power module 2, a mounting plate 3, a cleaning brush 4, a first probe 5, and a second probe 6. In particular, the communication assembly 1 may comprise an antenna module and a satellite positioning module. The antenna module can be communicated with an upper computer, and the satellite positioning module can acquire the longitude and the latitude of the position where the water quality detection device is located. The power supply module 2 may include a battery that can supply power to the entire water quality monitoring apparatus, and a control module for controlling the detection frequency and the like of the first probe 5 and the second probe 6. The mounting plate 3 may be provided with a plurality of mounting locations 31 in the form of holes, and the first probe 5 and the second probe 6 may be mounted at different mounting locations 31 and sealingly connected to the mounting plate 3. The first probe 5 and the second probe 6 may be connected to the communication assembly 1 and the power assembly 2 by means of connectors. Wherein, the first probe 5 can detect the ammonia nitrogen concentration of the water body (the example of the liquid to be detected), and the second probe 6 can detect the parameters of other reaction water quality information different from the ammonia nitrogen concentration. The cleaning brush 4 may be mounted to the mounting plate 3 and rotatable relative to the mounting plate 3 such that the cleaning brush 4 is able to clean the first probe 5 and the second probe 6. The control assembly and the mounting assembly can be mounted in the housing from a mounting opening in the housing, and the mounting plate 3 can cover the mounting opening and be connected with the housing in a sealing manner, so that the housing and the mounting plate 3 enclose a closed cavity. The first probe 5, the second probe 6 and the cleaning brush 4 extend out of the closed cavity, a leakage net (not shown in the figure) of a honeycomb type filter opening is sleeved outside the closed cavity, and the leakage net is detachably connected to the shell to play a certain role in filtering and protecting.

In a preferred embodiment, a first cover is sleeved on a part of the first probe 5 located in the closed cavity, the first cover is connected with the mounting plate 3 in a sealing manner to form a first sealed cavity, and a part of the first probe 5 located in the closed cavity is located in the first sealed cavity, so that when the first probe 5 is detached, external liquid to be measured does not enter the closed cavity but enters the first sealed cavity when entering the shell from the hole-shaped mounting position, and thus other parts in the closed cavity are not damaged. Referring to fig. 4 to 12, the first probe 5 may include a conversion module 51, a test module 52, a circulation module 53, a change module 54, and a control module 55. Specifically, the conversion module 51 may include a conversion compartment 511, a filter membrane 512, and an electrolysis assembly (an example of a conversion assembly). The electrolysis assembly may be located inside the conversion compartment 511, and the conversion compartment 511 may communicate with the outside of the first probe 5 through the filter membrane 512. Test module 52 may include an intermediary fluid, a test chamber 521, a first hydrophobic membrane 522, and a sensor 523. Mediating fluid and sensor 523 may be located inside test chamber 521, and test chamber 521 may communicate with conversion chamber 511 via first hydrophobic membrane 522. Circulation module 53 may include a reservoir 531, a mixing bin 535, a circulation pump receiving bin 536, a pump base 537, and a circulation pump 53a. The reservoir 531 may be in direct communication with the testing bin 521 and the mixing bin 535, and the intermediate fluid may be located inside the reservoir 531. The circulation pump 53a may be a diaphragm pump, and may be housed inside the circulation pump housing 536. The pump mount 537 may include a first passage 538 through which an output end of the circulation pump 53a may communicate with the test chamber 521 and a second passage 539 through which an input end of the circulation pump 53a may communicate with the mixing chamber 535, so that the test chamber 521, the reservoir 531, the mixing chamber 535, and the circulation pump 53a are connected in series to form a closed flow path. The change module 54 may include a change pump receiving bay 541 and a change pump 542. The sample change pump 542 may be a diaphragm pump, which may be housed inside the sample change pump housing 541. An input end of the change pump 542 may communicate with the conversion chamber 511, and an output end of the change pump 542 may communicate with the outside of the first probe 5. The control module 55 may include a controller that may control the operational timing of the remaining modules, except for the control module 55. Of course, this controller module may be integrated with the control module described above.

Referring to fig. 8, when the water quality monitoring device is at least partially submerged in the body of water, the sample change pump 542 may draw air within the conversion compartment 511 such that the body of water flows into the conversion compartment 511 under pressure. The filter membrane 512 can filter out impurities in the water body, so that the impurities in the water body can be prevented from blocking the sample changing pump 542. Of course, the filter membrane 512 is not required. The electrolysis component can electrolyze the water body in the conversion bin 511, so that ammonium ions in the water body are converted into ammonia gas. Wherein ammonia gas can enter the test bin 521 through the first hydrophobic membrane 522, and the water body cannot pass through the first hydrophobic membrane 522. The ammonia gas entering test bin 521 may react with the mediating fluid within test bin 521 to change a performance parameter of the mediating fluid. The sensor 523 can measure the performance parameters of the mediating liquid, and the controller can calculate the ammonia nitrogen concentration of the water body according to the variation of the performance parameters. In this way, the conversion module 51 is able to convert ammonium ions in the water body into ammonia gas without adding a reagent to the water body. The characteristic of water can not changed by reagent for the testing result of second probe 6 can not be influenced by first probe 5, and first probe 5 and second probe 6 can test simultaneously, and water quality monitoring device can be applicable to in situ detection. The water body can not be polluted by the reagent, so that the detection mode of the water quality monitoring device is more environment-friendly, and the in-situ detection can be realized in real time. In addition, the water quality monitoring device does not need to reserve a storage space for the reagent, so that the water quality monitoring device can have a smaller volume.

After one measurement is completed, the sample changing pump 542 can discharge the water in the conversion cabin 511 to the outside of the first probe 5, and the water outside the first probe 5 can be refilled in the conversion cabin 511 under the action of pressure. In this way, the first probe 5 can automatically replace the body of water in the conversion compartment 511. The circulating pump 53a may pump the intermediary liquid in the reservoir 531 to the test bin 521, and the intermediary liquid in the test bin 521 may flow into the reservoir 531 to compensate for the intermediary liquid lost from the reservoir 531. At this time, the intermediate liquid in the reservoir 531 having a low ammonium ion concentration may be mixed with the intermediate liquid in the test chamber 521 having a high ammonium ion concentration. The mediating liquid flowing from the reservoir 531 into the test chamber 521 can dilute the mediating liquid in the test chamber 521, and the mediating liquid flowing from the test chamber 521 into the reservoir 531 can be diluted in the reservoir 531, so that the ammonium ion concentration of the mediating liquid in the test chamber 521 is reduced. After the mediating liquid in the bin 521 to be tested is diluted to a certain degree, the circulation pump 53a may stop working to wait for the next measurement. In this way, the concentration of ammonium ions in the mediating fluid in the test chamber 521 can be increased at a slower rate, and the mediating fluid can have a longer service life. The user does not need to frequently replace the medium liquid, so that the first probe 5 can be used for long-time online detection. In addition, the intermediary liquid may circulate between the test bin 521 and the liquid storage bin 531 without being discharged to the outside of the first probe 5, so that the intermediary liquid may not change the characteristics of the water body, thereby further preventing the detection result of the second probe 6 from being influenced by the first probe 5.

Referring to fig. 4 to 7, in order to improve the space utilization rate inside the first probe 5, the liquid storage chambers 531 may be two independent chambers, and the two liquid storage chambers 531 are not directly connected. Specifically, the two liquid storage bins 531 may be respectively communicated with the conversion bin 511 and the mixing bin 535, and the medium liquids in the two liquid storage bins 531 may be mixed in the mixing bin 535. Further, the first probe 5 may have a central axis around which the two reservoirs 531, the circulation pump reservoir 536 and the change pump reservoir 541 may be arranged in a circumferential direction, and the two reservoirs 531 may be symmetrical with respect to the central axis.

Referring to fig. 7, after the first probe 5 is used for a certain period of time, the ammonium ion concentration in the intermediate solution will reach saturation, and the user can replace the intermediate solution through the solution inlet 533 disposed on the solution storage tank 531. Specifically, a sealing plug 532 may be disposed at the liquid inlet 533, and a second hydrophobic membrane 534 may be disposed on the sealing plug 532. In this way, the reservoir 531 can communicate with the outside of the first probe 5 through the second hydrophobic film 534. Air bubbles in the intermediate liquid can be discharged through the second hydrophobic membrane 534, thereby reducing the influence of the air bubbles on the test result.

Referring to fig. 13 and 14, the electrolytic assembly may include a cathode electrode 513 and an anode electrode 514. Specifically, the cathode electrode 513 may have a circular sheet-like structure, and the anode electrode 514 may have a circular ring-like structure. As shown in fig. 8, the cathode electrode 513 may be provided at a position corresponding to the first hydrophobic film 522, for example, the cathode electrode 513 may be arranged in parallel with the first hydrophobic film 522. The anode electrode 514 may be nested radially outward of the cathode electrode 513. In this way, the anode electrode 514 may have a larger surface area and form a radiant electric field with the cathode electrode 513, thereby increasing the electrolytic efficiency of the electrolytic assembly. The shape and size of the cathode electrode 513 may be adapted to the shape and size of the first hydrophobic membrane 522, so that the ammonia gas generated by the cathode electrode 513 is more concentrated and the ammonia gas is collected. Further, in order to obtain a better electrolysis effect, the distance between the cathode electrode 513 and the first hydrophobic film 522 may be greater than or equal to the distance between the anode electrode 514 and the first hydrophobic film 522. Preferably, the distance between the cathode electrode 513 and the first hydrophobic film 522 may be 1mm to 5mm, for example, may be 3mm. The diameter D of the cathode electrode 513 and the outer diameter D of the anode electrode 514 may satisfy D: D = 1. In addition, the cathode electrode 513 and the anode electrode 514 may be titanium electrodes having a platinum coating. The platinum coating can protect the anode electrode 514 from oxidation and can utilize its own catalytic hydrogen evolution characteristics to allow the cathode electrode 513 to generate more hydroxyl (OH) radicals ^- )。

Referring to fig. 15, the sensor 523 may be an electrode type conductivity sensor. In particular, the sensor 523 may include a back plate 524 and two pieces of conductivity electrodes 525. For example, the conductivity electrodes 525 may be made of stainless steel and the back plate 524 may be made of Polyetheretherketone (PEEK). The back plate 524 may be formed with a U-shaped groove, and two pieces of the conductivity electrodes 525 may be vertically installed at the bottom of the U-shaped groove and attached to both sidewalls of the U-shaped groove, respectively. The backing plate 524 can reduce unwanted contact of the conductivity electrode 525 with the mediating fluid, making the conductivity electrode 525 less susceptible to corrosion by the mediating fluid. Accordingly, the intermediary liquid may be a boric acid solution. The ammonia gas may react with and change the conductivity of the boric acid solution, and the electrode type conductivity sensor may measure the conductivity of the boric acid solution (an example of a performance parameter).

Referring to fig. 1 to 3, the second probe 6 may be a spectrum probe, which may be used to detect parameters of the water body such as Chemical Oxygen Demand (COD), turbidity (FTU), permanganate, biochemical Oxygen Demand (BOD), and Total Organic Carbon (TOC). Specifically, the second probe 6 may include a spectrum sensor and an optical path length adjusting element. The optical path adjusting element may enable the spectroscopic probe to have different optical paths so that the second probe 6 can be adapted to different water qualities.

(second embodiment)

A water quality monitoring device according to a second embodiment of the present application is a modification of the first embodiment, and the same reference numerals are used in the present embodiment for the same or similar features as those of the first embodiment, and detailed descriptions of these features are omitted.

In a second embodiment, the conversion module 51 may include a conversion compartment 511, a filtration membrane 512, and a photolysis assembly (an example of a conversion assembly). Specifically, the photolysis assembly may be located inside the conversion compartment 511, and the conversion compartment 511 may be in communication with the outside of the first probe 5 through the filter membrane 512. Referring to fig. 16, the photolysis assembly may include a photolysis catalyst 515 and a light source 516, and the photolysis catalyst 515 may be disposed at a position corresponding to the first hydrophobic film 522. When the light source 516 irradiates the photolysis catalyst 515, the photolysis catalyst 515 may photolyze the water body and generate ammonia gas. Further, the wavelength of the light source 516 may be 200nm to 300nm. The photolysis catalyst 515 may be a solid catalyst, for example, titanium dioxide (TiO) may be used ₂ ) Supported platinum (Pt) and ruthenium dioxide (RuO) ₂ ) As a photolysis catalyst 515.

(third embodiment)

A water quality monitoring device according to a third embodiment of the present application is a modification of the first embodiment, and the same reference numerals are used in the present embodiment for the same or similar features as those of the first embodiment, and detailed descriptions of these features are omitted.

In the third embodiment, referring to fig. 17, the cathode electrode 513 and the anode electrode 514 may have a square sheet structure. The cathode electrode 513 and the anode electrode 514 may be located in two different planes, respectively, and the cathode electrode 513 may be parallel to the anode electrode 514.

(fourth embodiment)

A water quality monitoring device according to a fourth embodiment of the present application is a modification of the first embodiment, and the same reference numerals are used in the present embodiment for the same or similar features as those of the first embodiment, and detailed descriptions of these features are omitted.

In the fourth embodiment, referring to fig. 18, the cathode electrode 513 and the anode electrode 514 may have a square sheet structure. The cathode electrode 513 and the anode electrode 514 may be located in the same plane, and the cathode electrode 513 may be perpendicular to the anode electrode 514.

(fifth embodiment)

A water quality monitoring device according to a fifth embodiment of the present application is a modification of the first embodiment, and the same reference numerals are used in the present embodiment for the same or similar features as those of the first embodiment, and detailed descriptions of these features are omitted.

In the fifth embodiment, referring to fig. 19, the cathode electrode 513 and the anode electrode 514 may have a circular sheet structure. The cathode electrode 513 and the anode electrode 514 may be located in two different planes, respectively, and the cathode electrode 513 may be parallel to the anode electrode 514.

(sixth embodiment)

A water quality monitoring device according to a sixth embodiment of the present application is a modification of the first embodiment, and the same reference numerals are used in the present embodiment for the same or similar features as those of the first embodiment, and detailed descriptions of these features are omitted.

In the sixth embodiment, referring to fig. 20, the sensor 523 may be a capacitive sensor. In particular, the sensor 523 may include a back plate 524, a capacitive electrode 526, and an insulating layer 527. The back plate 524 may be formed with a U-shaped groove, and the two capacitor electrodes 526 may be vertically mounted at the bottom of the U-shaped groove and respectively attached to both sidewalls of the U-shaped groove. The surface of the capacitance electrode 526 may be coated with an insulating layer 527 so that the two pieces of capacitance electrode 526 are formed as a parallel plate capacitor. The intermediate liquid may serve as the dielectric of a parallel plate capacitor. When the ammonium ion concentration of the intermediate solution changes, the relative dielectric constant (an example of a performance parameter) of the intermediate solution changes, so that the ammonia nitrogen content of the water body can be calculated.

(seventh embodiment)

A water quality monitoring device according to a seventh embodiment of the present application is a modification of the first embodiment, and the same reference numerals are used in the present embodiment for the same or similar features as those of the first embodiment, and detailed descriptions of these features are omitted.

In a seventh embodiment, referring to fig. 21, the circulation module 53 may include a reservoir 531, a sleeve 53b, a piston 53c, and an electric push rod 53d. Specifically, reservoir 531 may be in communication with test chamber 521, and the mediating fluid may be located inside reservoir 531. The sleeve 53b may be fitted around the piston 53c, and one end (lower end in fig. 21) of the sleeve 53b may communicate with the test chamber 521. The piston 53c may be fixed to an end of the electric ram 53d, and the electric ram 53d may drive the piston 53c to reciprocate between one end and the other end (upper end in fig. 21) of the sleeve 53 b.

After a measurement is completed, the piston 53c can move from one end of the sleeve 53b to the other and generate a negative pressure. The mediating liquid in the test bin 521 can flow into the sleeve 53b under the action of negative pressure, and the mediating liquid in the liquid storage bin 531 can flow into the test bin 521 to compensate the mediating liquid flowing out of the test bin 521. At this time, the intermediate liquid in the liquid reservoir 531 having a low ammonium ion concentration may be mixed with the intermediate liquid in the test chamber 521 having a high ammonium ion concentration. The mediating liquid flowing from the reservoir 531 into the test chamber 521 can dilute the mediating liquid in the test chamber 521, so that the concentration of ammonium ions in the mediating liquid in the test chamber 521 is reduced. When the piston 53c moves from the other end of the sleeve 53b to one end, the intermediary liquid in the sleeve 53b can flow into the test chamber 521, and the intermediary liquid in the test chamber 521 can flow into the reservoir 531. The piston 53c may reciprocate multiple times to substantially dilute the intermediary fluid in the test chamber 521. After the medium liquid in the bin 521 to be tested is diluted to a certain degree, the electric push rod 53d may stop working to wait for the next measurement.

(eighth embodiment)

A water quality monitoring device according to an eighth embodiment of the present application is a modification of the first embodiment, and the same reference numerals are used in the present embodiment for the same or similar features as those of the first embodiment, and detailed descriptions of these features are omitted.

In the eighth embodiment, referring to fig. 22, the circulation module 53 may include a circulation pipe 53e, a circulation pump 53a, a first valve body 53h, and a second valve body 53i. Specifically, the intermediate liquid may be located inside the circulation pipe 53 e. The circulation pump 53a may be a diaphragm pump, one end of the circulation line 53e may be communicated with an output end of the circulation pump 53a, and the other end of the circulation line 53e may be communicated with an input end of the circulation pump 53a. The first valve body 53h and the second valve body 53i may be solenoid valves. The upstream portion 53f of the circulation pipe 53e may communicate with the test chamber 521 through the first valve body 53h, and the downstream portion 53g of the circulation pipe 53e may communicate with the test chamber 521 through the second valve body 53i, so that the test chamber 521, the circulation pipe 53e, and the circulation pump 53a form a closed flow path in series. Of course, the first valve body 53h and the second valve body 53i are not essential.

When the test module 52 is operated, the first valve body 53h and the second valve body 53i may be closed. After one measurement is completed, the first valve body 53h and the second valve body 53i can be opened simultaneously. The circulation pump 53a may pump the intermediary fluid from the downstream portion 53g to the upstream portion 53f, the intermediary fluid from the upstream portion 53f may flow into the test chamber 521, and the intermediary fluid in the test chamber 521 may flow into the downstream portion 53g to compensate for the intermediary fluid lost from the downstream portion 53 g. At this time, the intermediate liquid in the circulation line 53e having a low ammonium ion concentration may be mixed with the intermediate liquid in the test chamber 521 having a high ammonium ion concentration. The mediating liquid flowing into the test chamber 521 from the upstream portion 53f may dilute the mediating liquid in the test chamber 521, and the mediating liquid flowing into the downstream portion 53g from the test chamber 521 may be diluted in the downstream portion 53g, so that the concentration of ammonium ions in the mediating liquid in the test chamber 521 is reduced. After the mediating liquid in the bin 521 to be tested is diluted to a certain degree, the circulation pump 53a may stop working to wait for the next measurement.

(ninth embodiment)

A water quality monitoring device according to a ninth embodiment of the present application is a modification of the first embodiment, and the same reference numerals are used in the present embodiment for the same or similar features as those of the first embodiment, and detailed description thereof is omitted.

In the ninth embodiment, referring to fig. 23, the sample-changing pump 542 may be a submersible pump, and the conversion module 51 may further include an exhaust pipe 517. Specifically, the sample changing pump 542 may be integrally provided within the conversion housing 511. The input end of the change pump 542 may communicate with the conversion chamber 511, and the output end of the change pump 542 may communicate with the outside of the first probe 5. Accordingly, the conversion compartment 511 may be in communication with the atmosphere via the exhaust duct 517. The rate at which the change pump 542 discharges the body of water may be greater than the rate at which the body of water enters the conversion silo 511 such that the body of water within the conversion silo 511 may be completely replaced.

The application has at least the following advantages:

(i) The conversion module 51 is capable of converting ammonium ions in the water body to ammonia gas without adding a reagent to the water body. The characteristic of water can not be changed by reagent for the testing result of second probe 6 can not be influenced by first probe 5, and water quality monitoring device can be applicable to in situ detection. The water body can not be polluted by the reagent, so that the detection mode of the water quality monitoring device is more environment-friendly. In addition, the water quality monitoring device does not need to reserve a storage space for the reagent, so that the water quality monitoring device can have a smaller volume.

(ii) By providing the circulation module 53, the concentration of ammonium ions in the mediating solution in the test chamber 521 can be increased at a slower rate, and the mediating solution can have a longer service life. The user does not need to frequently replace the medium liquid, so that the first probe 5 can be used for long-time online detection. In addition, the intermediary liquid may circulate between the test bin 521 and the liquid storage bin 531 without being discharged to the outside of the first probe 5, so that the intermediary liquid may not change the characteristics of the water body, thereby further preventing the detection result of the second probe 6 from being influenced by the first probe 5.

It should be understood that the above embodiments are merely exemplary, and are not intended to limit the present application. Various modifications and alterations of the above-described embodiments may be made by those skilled in the art in light of the teachings of this application without departing from the scope thereof.

It should be understood that the second probe 6 is not limited to the inclusion of a spectroscopic sensor, nor is it limited to the detection of parameters such as chemical oxygen demand, turbidity, permanganate index, biochemical oxygen demand, and total organic carbon of the water body. For example, the second probe 6 may include one or more of a gas sensor, a flow rate sensor, an acceleration sensor, and an image sensor, and the second probe 6 may be used to detect one or more of pH, temperature, dissolved Oxygen (DO), conductivity, total Nitrogen (TN), nitrate index, organic phosphorus, residual chlorine, heavy metals, chlorophyll, blue-green algae, total phosphorus, oil in water, and the like, of the body of water.

It should be understood that the sensor 523 is not limited to being an electrode-type conductivity sensor or a capacitive sensor. For example, sensor 523 may be an inductive conductivity sensor that may include an excitation coil and an induction coil to detect the conductivity of the intervening fluid. Alternatively, the sensor 523 may be a pH sensor, which may include a pH electrode to detect the pH of the intermediary fluid. The conductivity electrode 525 is not limited to the pattern shown for the embodiment. For example, the conductive electrode 525 may be a four-probe electrode manufactured according to the van der Waals method. Accordingly, the performance parameter is not limited to conductivity, relative permittivity or pH, and may be any performance parameter known to those skilled in the art that can be used to characterize the concentration of ammonium ions.

It should be understood that the circulation pump 53a is not limited to being a diaphragm pump, the change-out pump 542 is not limited to being a diaphragm pump or a submersible pump, and the circulation pump 53a and the change-out pump 542 may be any possible type of pump known to those skilled in the art. For example, the circulation pump 53a and the change pump 542 may be plunger pumps.

It should be understood that the first valve body 53h and the second valve body 53i are not limited to being solenoid valves, and may be any possible kinds of valves known to those skilled in the art. For example, the first valve body 53h and the second valve body 53i may be check valves.

It should be understood that the cleaning brush 4 is not limited to rotation, but may also be translated.

Claims (10)

1. A water quality monitoring device, comprising:

the device comprises a first probe, a second probe and a third probe, wherein the first probe is used for detecting the ammonia nitrogen concentration of a liquid to be detected, the second probe comprises a conversion module and a test module, the conversion module comprises a conversion bin and a conversion assembly, the conversion bin is used for containing the liquid to be detected, the conversion assembly is positioned in the conversion bin and used for converting ammonium ions in the liquid to be detected into ammonia gas, the conversion assembly is an electrolysis assembly or a photolysis assembly, the electrolysis assembly comprises a cathode electrode and an anode electrode, the photolysis assembly comprises a photolysis catalyst and a light source, the test module comprises a test bin, a mediating liquid and a sensor, the mediating liquid and the sensor are positioned in the test bin, the test bin is communicated with the conversion bin through a hydrophobic film, the ammonia gas can pass through the hydrophobic film to react with the mediating liquid, and the sensor is used for detecting performance parameters of the mediating liquid so as to obtain the ammonium ion concentration in the mediating liquid; and

and the second probe is used for detecting other parameters of reaction water quality information different from the ammonia nitrogen concentration.

2. The water quality monitoring device according to claim 1,

the first probe further comprises a circulation module, the circulation module comprises a liquid storage bin and a circulating pump, the intermediate liquid is located inside the liquid storage bin, the test bin, the liquid storage bin and the circulating pump are connected in series to form a closed flow path, the circulating pump drives the intermediate liquid to flow along the closed flow path, so that the intermediate liquid in the liquid storage bin is interactive with the intermediate liquid in the test bin, or the circulating pump drives the intermediate liquid to flow along the closed flow path

The first probe further comprises a circulation module, the circulation module comprises a liquid storage bin, a sleeve and a piston, the medium liquid level is located inside the liquid storage bin, the test bin and the liquid storage bin are communicated with one end of the sleeve, the sleeve is sleeved on the piston, and when the piston reciprocates between one end of the sleeve and the other end of the sleeve, medium liquid in the liquid storage bin is interacted with the medium liquid in the test bin, or

The first probe further comprises a circulating module, the circulating module comprises a circulating pipeline and a circulating pump, the medium liquid is located inside the circulating pipeline, the testing bin, the circulating pipeline and the circulating pump are connected in series to form a closed flow path, and the circulating pump drives the medium liquid to flow along the closed flow path, so that the medium liquid in the circulating pipeline and the medium liquid in the testing bin are interacted.

3. The water quality monitoring device according to claim 1 or 2, wherein the conversion component is an electrolysis component, the cathode electrode has a sheet structure, the anode electrode has a ring structure, the anode electrode is sleeved outside the cathode electrode, and the axial direction of the anode electrode is perpendicular to the cathode electrode.

4. The water quality monitoring device according to claim 3, wherein the cathode electrode and the hydrophobic membrane are arranged in parallel with each other, and a distance between the cathode electrode and the hydrophobic membrane is greater than or equal to a distance between the anode electrode and the hydrophobic membrane.

5. The water quality monitoring apparatus according to claim 1 or 2,

the sensor comprises one of the following sensors:

an electrode type conductivity sensor including a conductivity electrode to detect conductivity of the mediating liquid;

an inductive conductivity sensor comprising an excitation coil and an induction coil to detect the conductivity of the mediating liquid;

a pH sensor including a pH electrode to detect a pH value of the intermediary liquid; and

a capacitive sensor comprising a parallel plate capacitor to detect the relative permittivity of the intermediary liquid.

6. The water quality monitoring device according to claim 1 or 2, wherein the first probe further comprises a sample changing module, the sample changing module comprises a sample changing pump, an input end of the sample changing pump is communicated with the conversion bin, and an output end of the sample changing pump is communicated with the outside of the first probe.

7. The water quality monitoring device according to claim 6,

the sample changing pump is a diaphragm pump and is positioned outside the conversion bin, or

The sample changing pump is a submersible pump, the whole sample changing pump is located inside the conversion bin, and the conversion bin is communicated with the atmosphere.

8. The water quality monitoring device according to claim 1 or 2, wherein the conversion bin is communicated with the outside of the first probe through a filter membrane.

9. A water quality monitoring apparatus according to claim 1 or 2 wherein the second probe comprises at least one of a spectral sensor, a gas sensor, a flow rate sensor, an acceleration sensor and an image sensor.

10. A water quality monitoring apparatus according to claim 1 or 2 further comprising a cleaning brush movable to clean the first probe and/or the second probe.

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