CN219533107U - Water quality detection device and system based on micro-fluidic chip - Google Patents
Water quality detection device and system based on micro-fluidic chip Download PDFInfo
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- CN219533107U CN219533107U CN202223438963.9U CN202223438963U CN219533107U CN 219533107 U CN219533107 U CN 219533107U CN 202223438963 U CN202223438963 U CN 202223438963U CN 219533107 U CN219533107 U CN 219533107U
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Abstract
The utility model relates to a water quality detection device and system based on a microfluidic chip. The water quality detection device based on the microfluidic chip comprises a control module, a driving module, the microfluidic chip and a detection module, wherein the control module is respectively in communication connection with the driving module, the microfluidic chip and the detection module, the driving module is connected with the microfluidic chip, the microfluidic chip is connected with the detection module, the microfluidic chip is integrated with a valve unit for controlling a liquid flow path, the driving module is used for sucking a water sample to be detected and a detection reagent to enter the detection module through the microfluidic chip, and waste liquid generated by the detection module is discharged through the microfluidic chip after detection is completed, and the detection module is used for digesting the water sample to be detected by using the detection reagent and detecting the digested water sample. The utility model can realize the multi-index detection of the water sample without reagent or with few reagents.
Description
Technical Field
The utility model relates to the technical field of water quality detection, in particular to a water quality detection device and system based on a micro-fluidic chip.
Background
The water quality detector is an instrument which enables corresponding substances in water to participate in the water through electrochemical reaction or chemical agent reaction, and then calculates the content of the corresponding substances in the water through colorimetry, titration, conductivity measurement and other modes. However, the consumption of chemical reagents and the waste liquid generated are maintained regularly, and are also the use cost of the whole life cycle of the instrument equipment. In particular, each device of the wet chemistry water quality detector only tests one factor, so that the detection cost of multiple indexes cannot be reduced. The application of these water quality detectors is limited if it is used in a scene where power supply is inconvenient or in the field of ocean.
At present, the water quality automatic detection equipment of wet chemical methods on the market, such as chemical oxygen demand, ammonia nitrogen, total phosphorus, total nitrogen and the like, basically is an automatic detection equipment for only testing one factor, and high construction cost is caused. Meanwhile, the general reagent consumption is in the level of a few milliliters, so that the reagent consumption and the waste liquid production reach more than 10 liters per month, the maintenance amount is heavy, the existing equipment is too large in size and not suitable for various integrated application and expansion of various application scenes, and particularly the complex working conditions such as sea surfaces, lake surfaces, sea/river beaches and the like are adopted. The related power components and flow path control components adopted by the existing in-situ nutrient salt water quality automatic detection equipment (nitrate nitrogen, nitrite nitrogen, ammonia nitrogen, phosphate and silicate) are large in volume and heavy in weight, so that effective volume and weight are not beneficial to the power components and reagent components, and miniaturization and even microminiaturization are not well realized.
In addition, the existing automatic water quality detection equipment generates a large amount of waste liquid due to large consumption of reagents, needs to be maintained regularly, has large volume of parts and heavy whole machine, is unsuitable for application under complex working conditions such as sea surface, lake surface, sea/river beach and the like, and is also used for testing a factor, so that multiple automatic detection equipment is required for multiple indexes, and the in-situ nutrient salt can test ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, phosphate and silicate, but cannot test total nitrogen, total phosphorus, chemical oxygen demand or permanganate index and the like. In addition, more joints are adopted to connect the parts, so that the risk of air tightness is increased, and operation faults can be caused once the air tightness is poor.
In view of the foregoing, there is a need for a device that is small in size, low in consumption, low in reagent consumption, and capable of performing multi-index detection of water quality.
Disclosure of Invention
In view of the above, the present utility model provides a water quality detection device and system based on a microfluidic chip, which aims to solve the above technical problems.
In a first aspect, the present utility model provides a microfluidic chip-based water quality detection device, the device comprising: the device comprises a control module, a driving module, a microfluidic chip and a detection module, wherein the control module is respectively in communication connection with the driving module, the microfluidic chip and the detection module, the driving module is connected with the microfluidic chip, the microfluidic chip is connected with the detection module, and the microfluidic chip is integrated with a valve unit for controlling a liquid flow path;
the driving module is used for sucking a water sample to be detected and a detection reagent to enter the detection module through the valve unit; after the detection is finished, the waste liquid generated by the detection module is discharged through the valve unit;
the detection module is used for digesting the water sample to be detected by using the detection reagent and detecting the digested water sample.
In a second aspect, the present utility model provides a water quality detection system based on a microfluidic chip, the system comprising a water quality detection device based on a microfluidic chip as described above and a data server, both communicating via a wireless electromagnetic network or an underwater acoustic communication network.
Compared with the prior art, the technical scheme provided by the embodiment of the utility model has the following advantages:
the utility model designs a water quality multi-index free/few-reagent detection device based on the actual problem demand and application demand of the existing water quality automatic detection device, adopts the micro-fluidic chip technology, integrates a valve unit for controlling a liquid flow path in the micro-fluidic chip, can accurately control the mixed reaction condition of a reagent and a water sample and realize the reaction process, and accurately control the detection condition and realize the measurement process. In addition, the sampling microfluidic chip technology reduces the size and length of a liquid flow path, so that the mixing and reaction of different liquids are very rapid, the liquid flow path is also very short, the measurement time is fully saved, and the amount of liquid reagents is greatly reduced, thereby correspondingly reducing the generation amount of reagent waste liquid and greatly reducing the running and maintenance cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a water quality detection device based on a microfluidic chip;
FIG. 2 is a schematic structural diagram of a water quality detection device based on a microfluidic chip;
the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, a schematic block diagram of a water quality detection device based on a microfluidic chip according to the present utility model is shown.
The water quality detection device based on the micro-fluidic chip comprises a control module 40, a driving module 10, a micro-fluidic chip 20 and a detection module 30, wherein the control module 40 is respectively in communication connection with the driving module 10, the micro-fluidic chip 20 and the detection module 30, the driving module 10 is connected with the micro-fluidic chip 20, the micro-fluidic chip 20 is connected with the detection module 30, and the micro-fluidic chip 20 is integrated with a valve unit for controlling a liquid flow path and a flow path channel corresponding to the valve unit;
the control module 40 is used for controlling the execution of the driving module 10 and the detection module 30;
the driving module 10 is used for sucking a water sample to be detected and a detection reagent, entering the detection module 30 through the valve unit, and discharging waste liquid generated by the detection module 30 through the valve unit after detection is completed;
the detection module 30 is configured to digest the water sample to be detected with the detection reagent, and detect the digested water sample.
In this embodiment, the control module 40 may be a micro control unit (Microcontroller Unit, MCU), the driving module 10 may be an injection pump capable of sucking and discharging liquid, the microfluidic chip 20 has the characteristics of controllable liquid flow, extremely small consumption of samples and reagents, ten times or hundreds of times higher analysis speed, etc., it can analyze multiple samples simultaneously in a few minutes or even shorter, and can realize the whole pretreatment and analysis process of the samples online, and the detection module 30 may be a detection module for carrying out digestion reaction on a water sample to be detected, carrying out ultraviolet fluorescence detection on water quality after the digestion reaction, colorimetric detection, etc. The control module 40 is respectively in communication connection with the driving module 10, the microfluidic chip 20 and the detection module 30, the communication connection can be wire communication connection or wireless communication connection, the driving module 10 is connected with the microfluidic chip 20 through a micro pipeline liquid path, the microfluidic chip 20 is connected with the detection module 30 through a micro pipeline liquid path, namely, liquid can comprise a water sample to be detected, a reagent and a cleaning water sample under the control of the control module 40, and can circulate between the driving module 10 and the microfluidic chip 20 or between the microfluidic chip 20 and the detection module 30.
The control module 40 may control the drive module 10 and may also control the detection module 30. Because the driving module 10 is connected with the microfluidic chip 20 in a liquid path, the driving module 10 absorbs the water sample to be detected and the detection reagent to be detected, passes through the valve unit of the microfluidic chip 20 and enters the detection module 30, and the detection module 30 detects the water quality of the water sample to be detected. After the detection is completed, the driving module 10 discharges the waste liquid generated after the detection module 30 performs the detection through the valve unit of the microfluidic chip 20. The control module 40 can also control the detection module 30 to calculate the concentration of silicate in the water sample to be detected, etc.
The driving module 10 absorbs the water sample to be detected and the detection reagent to enter the detection module through the microfluidic chip 20, and the driving module 10 can also absorb distilled water to clean the micro-pipelines in the microfluidic chip 20 and the detection module 30. The driving module 10 is further configured to discharge the waste liquid generated after the detection by the detection module 30 through the valve unit of the microfluidic chip, and the driving module 10 may also discharge the waste liquid after the micro-pipeline in the microfluidic chip 20 and the detection module 30 is cleaned through the microfluidic chip 20.
The detection module 30 utilizes a detection reagent to digest the water sample to be detected, and detects the digested water sample, wherein the digestion refers to acid solution or alkali solution and damages organic matters or reducing matters in the sample under the heating condition.
The utility model designs a water quality multi-index free/few-reagent detection device based on the actual problem demand and application demand of the existing water quality automatic detection device, adopts the micro-fluidic chip technology, integrates a valve unit for controlling a liquid flow path in the micro-fluidic chip, can accurately control the mixed reaction condition of a reagent and a water sample and realize the reaction process, and accurately control the detection condition and realize the measurement process.
Referring to fig. 2, a schematic structural diagram of a water quality detection device based on a microfluidic chip according to the present utility model is shown, wherein a valve unit of the microfluidic chip 20 includes a first two-position three-way valve unit, a second two-position three-way valve unit, a third two-position three-way valve unit, a first two-position two-way valve unit, and a bellows;
the normally closed end of the first two-position three-way valve unit is connected with one end of the corrugated pipe, the other end of the corrugated pipe is connected with the normally open end of the first two-position three-way valve unit, the normally closed end of the first two-position three-way valve unit is connected with the public end of the second two-position three-way valve unit, the public end of the first two-position three-way valve unit is connected with the normally open end of the third two-position three-way valve unit, the normally open end of the third two-position three-way valve unit is connected with the output end of the detection module 30, and the normally closed end of the third two-position three-way valve unit is connected with the input end of the detection module 30.
The first two-position three-way valve unit refers to the two-position three-way valve 25 in fig. 2, the second two-position three-way valve unit refers to the two-position three-way valve 26 in fig. 2, the third two-position three-way valve unit refers to the two-position three-way valve 21-24 in fig. 2, the first two-position two-way valve unit refers to the two-position two-way valve 271-279 in fig. 2, the bellows refers to the 29 in fig. 2, the normally closed end of the first two-position two-way valve unit 271-279 is connected with one end of the bellows 29, the other end of the bellows 29 is connected with the normally open end of the first two-position three-way valve unit 25, the normally closed end of the first two-position three-way valve unit 25 is connected with the common end of the second two-position three-way valve unit 26, the common end of the first two-position three-way valve unit 25 is connected with the normally open end of the third two-position three-way valve unit 21-24, the normally open end of the third two-way valve unit 21-24 is connected with the output end of the detection module 30, and the normally closed end of the third two-position three-way valve unit 21-24 is connected with the input end of the detection module 30. Further, the corresponding lines of the first two-way valve units 270-279 and the second two-way valve unit 279A may be connected to the bellows 29 by a circular ring. The bellows 29 is used to mix liquid and/or air entering from the first two-way valve unit 270-279 with the second two-way valve unit 279A. When the valve element is not energized, the normally open end N0 is in communication with the common end, and the normally closed end NC is in a closed state with the common end. When the valve is electrified, the normally open end N0 and the common end are in a closed state, and the normally closed end NC and the common end are in a communicated state.
The valve components are integrated on the microfluidic chip, so that joints required during connection between valves can be omitted, the air tightness is fully ensured, faults are reduced, the flow path space is also saved, the reagent consumption is fully reduced, the fault points of the water quality detection device are reduced, and the stability of the water quality detection device is improved.
Further, the third two-position three-way valve unit comprises a first two-position three-way valve element, a second two-position three-way valve element, a third two-position three-way valve element and a fourth two-position three-way valve element;
the common end of the first two-position three-way valve element is connected with the driving module 10, the normally open end of the first two-position three-way valve element is connected with the common end of the second two-position three-way valve element, the normally open end of the second two-position three-way valve element is connected with the common end of the third two-position three-way valve element, the normally open end of the third two-position three-way valve element is connected with the common end of the fourth two-position three-way valve element, and the normally open end of the fourth two-position three-way valve element is connected with the common end of the first two-position three-way valve unit.
The common end of the first two-position three-way valve element 21 is connected with the driving module 10 (for example, connected with the driving module 10 through the buffer ring 7), the normal open end of the first two-position three-way valve element 21 is connected with the common end of the second two-position three-way valve element 22, the normal open end of the second two-position three-way valve element 22 is connected with the common end of the third two-position three-way valve element 23, the normal open end of the third two-position three-way valve element 23 is connected with the common end of the fourth two-position three-way valve element 24, and the normal open end of the fourth two-position three-way valve element 24 is connected with the common end of the first two-position three-way valve unit 25.
Further, the detection module 30 includes a digestion unit, an ultraviolet fluorescence detection unit, a first colorimetric detection unit, and a second colorimetric detection unit;
the output end of the digestion unit is connected with the normally open end of the fourth two-position three-way valve element, and the input end of the digestion unit is connected with the normally closed end of the fourth two-position three-way valve element;
the output end of the ultraviolet fluorescence detection unit is connected with the normally open end of the third two-position three-way valve element, and the input end of the ultraviolet fluorescence detection unit is connected with the normally closed end of the third two-position three-way valve element;
the output end of the first color comparison detection unit is connected with the normally open end of the second two-position three-way valve element, and the input end of the first color comparison detection unit is connected with the normally closed end of the second two-position three-way valve element;
the output end of the second colorimetric detection unit is connected with the normally open end of the first two-position three-way valve element, and the input end of the second colorimetric detection unit is connected with the normally closed end of the first two-position three-way valve element.
The output end of the digestion unit 3 is connected with the normally open end of the fourth two-position three-way valve 24 through a connector, the input end of the digestion unit 3 is connected with the normally closed end of the fourth two-position three-way valve 24 through a connector, the output end of the ultraviolet fluorescence detection unit 4 is connected with the normally open end of the third two-position three-way valve 23 through a connector, the input end of the ultraviolet fluorescence detection unit 4 is connected with the normally closed end of the third two-position three-way valve 23 through a connector, the output end of the first colorimetric detection unit 5 is connected with the normally closed end of the second two-position three-way valve 22 through a connector, the input end of the first colorimetric detection unit 5 is connected with the normally closed end of the second two-position three-way valve 22 through a connector, the output end of the second colorimetric detection unit 6 is connected with the normally closed end of the first two-position three-way valve 21 through a connector, and the input end of the second colorimetric detection unit 6 is connected with the normally closed end of the first two-position three-way valve 21 through a connector.
The input end of the digestion unit 3 is connected with the normally closed end of the two-position two-way valve element 901 through a connector, the input end of the ultraviolet fluorescence detection unit 4 is connected with the normally closed end of the two-position two-way valve element 902 through a connector, the input end of the first colorimetric detection unit 5 is connected with the normally closed end of the two-position two-way valve element 903 through a connector, the second colorimetric detection unit 6 is respectively connected with the normally closed end of the two-position two-way valve element 904 through a connector, and the two-position two-way valve elements 901-904 are used for introducing atmospheric pressure, so that after detection or reaction is carried out by the digestion unit 3, the ultraviolet fluorescence detection unit 4, the first colorimetric detection unit 5 and the second colorimetric detection unit 6, waste liquid can be discharged from the detection module 30.
Further, the water quality detecting device further comprises a cleaning waste liquid barrel 289 and a reagent waste liquid barrel 289A, the normal open end of the second two-position three-way valve unit 26 is connected with the reagent waste liquid barrel 289 through a connector, and the normal closed end of the second two-position three-way valve unit 26 is connected with the cleaning waste liquid barrel 289A through a connector.
Further, the water quality detection device further includes a second two-position two-way valve unit 279A, the second two-position two-way valve unit 279A is connected with the normally closed end of the first two-position two-way valve units 270-279, and the second two-position two-way valve unit 279A is used for controlling air to enter the microfluidic chip 20.
Further, the first two-way valve unit 270-279 includes two or more two-way valve members for controlling the water sample to be tested and the detection reagent to enter the microfluidic chip 20, each two-way valve member is connected with the water sample to be tested and the detection reagent outside the microfluidic chip 20 through a connector, each two-way valve member has a corresponding detection reagent or the water sample to be tested, for example, acidic molybdic acid enters the microfluidic chip 20 through the two-way valve member 272, reducing agent enters the microfluidic chip 20 through the two-way valve member 273, and masking agent enters the microfluidic chip 20 through the two-way valve member 279.
Further, the water quality detection device further comprises a buffer ring 7, and the driving module 10 is connected with the first two-position three-way valve element 21 of the microfluidic chip 20 through the buffer ring 7 by a joint. The buffer ring can avoid high pressure or impact pressure such as pressure peaks.
Further, the device further comprises a distilled water container unit 8, the distilled water container unit 8 is connected with a driving module 10, distilled water is filled in the distilled water container unit 8, and the driving module 10 can absorb distilled water to clean the pipeline in the microfluidic chip 20 and the pipeline in the detection module 30.
Further, the apparatus further includes a wireless communication unit electrically connected to the control module 40, the wireless communication unit including a wireless electromagnetic communication unit or an underwater sound communication unit. The water quality detection device based on the microfluidic chip can establish communication connection with other devices (such as a server, an underwater sound communication machine and the like) through a wireless communication unit so as to communicate with the other devices.
Through the comprehensive application of the microfluidic chip technology and the water quality detection device, the components are integrated compactly, the number of joints between pipelines is reduced, so that the air tightness is improved, the number of two-position two-way valve parts of the microfluidic chip can be increased according to requirements, the number of reagent joints is expanded, a plurality of indexes can be tested on one device, and the high-integration microfluidic chip control flow path fully reduces the amount of reagents and improves the mixing efficiency.
Taking the detection of silicate concentration in a water sample to be detected as an example to explain the scheme, firstly, a rinsing operation is carried out, the driving module 10 sucks a stroke and gates 1-1, the two-position three-way valve 24 is electrified to be connected with a normally closed end, at the moment, the public end and the normally closed end are in a way, the public end and the normally open end are in a way of being disconnected, the two-position three-way valve 271 is electrified to open and suck the water sample for rinsing, after a certain time of sucking the water sample for rinsing, the two-position three-way valve 271 is powered off to close, the two-position three-way valve 279A is opened to suck air, the water sample for rinsing enters the corrugated pipe 29 to be mixed with air, then a certain time is carried out, the water sample for rinsing completely enters the digestion unit 3, the two-position three-way valve 279A is closed to stop sucking air, the driving module 10 advances the stroke and gates 1-1, the two-position three-way valve 25 is electrified to be connected with the normally closed end, the two-position three-way valve 26 is electrified to be connected with the normally closed end, the water sample for rinsing water sample enters the cleaning waste barrel 289A, and the control module 40 controls the two-position three-way valve 24 to be powered off, and the two-way valve 26 to be powered off.
Then, the detection operation is performed, the driving module 10 sucks the travel and gates 1-1, the two-position three-way valve 24 is electrified to be connected with the normally closed end, the two-position two-way valve 271 is electrified to be opened to suck the water sample to be detected, the two-position two-way valve 271 is closed, the two-position two-way valve 279A is opened to suck air, the water sample to be detected and the air enter the corrugated tube 29 to be mixed, the two-position two-way valve 279A is in power-off for a certain time, the two-position three-way valve 24 is in power-off, and the driving module 10 is reset (for example, the propulsion travel and gates 1-2 reset driving module 10);
the driving module 10 absorbs stroke and gating 1-1, the two-position three-way valve element 24 is electrified to be connected with a normally closed end, the two-position three-way valve element 272 absorbing acidic ammonium molybdate solution is electrified to be opened, after absorbing a certain time, the two-position three-way valve element 272 is powered off, the two-position two-way valve element 279A is opened to absorb air, the acidic ammonium molybdate solution enters the corrugated pipe 29 through the valve element 272 to be mixed with a water sample to be detected, then enters the digestion unit 3 together, the valve element 279A is powered off for a certain time, the two-position three-way valve element 24 is powered off, the metered acidic ammonium molybdate solution enters the digestion unit 3 and silicate in the water sample to react to form yellow silicon-molybdenum heteropolyacid and silicon-molybdenum yellow, and the driving module 10 is reset;
the driving module 10 absorbs stroke and gating 1-1, the two-position three-way valve 24 is electrified to be connected with a normally closed end, the two-position three-way valve 279 absorbing the masking agent is electrified to be opened, a certain time is absorbed, the two-position three-way valve 279 is powered off, the two-position two-way valve 279A is opened to absorb air, the masking agent enters the digestion unit 3 after being mixed by the corrugated pipe 29 through the valve 279, the operation is carried out for a certain time again, the valve 279A is powered off, the two-position three-way valve 24 is powered off, the citric acid and the antimony potassium tartrate of the masking agent remove the interference of substances such as phosphorus, potassium and the like in the sea water, and the driving module 10 is reset;
the driving module 10 absorbs stroke and gating 1-1, the two-position three-way valve 24 is electrified to be connected with a normally closed end, the two-position three-way valve 273 for absorbing the reducing agent is electrified to be opened, a certain time is absorbed, the two-position three-way valve 273 is powered off, the two-position two-way valve 279A is opened to absorb air, the reducing agent enters the digestion unit 3 after entering the corrugated pipe 29 through the valve 273 to be mixed, then the operation is carried out for a certain time, the valve 279A is powered off, the two-position three-way valve 24 is powered off, the silicon molybdenum yellow reacts with ascorbic acid in the reducing agent to produce silicon molybdenum blue after passing through the masking agent, and the driving module 10 is reset;
the driving module 10 absorbs the stroke and the gating 1-1, the two-position two-way valve element 901 is electrified to open the atmospheric pressure to the digestion unit 3, the two-position three-way valve element 22 is electrified to connect the normally closed end, the mixed liquid enters the first colorimetric detection unit 5, the two-position two-way valve element 901 is powered off to close, the two-position three-way valve element 22 is closed, the absorbance is calculated at the first colorimetric detection unit 5, the absorbance is in direct proportion to the concentration, and the concentration of silicate in the water sample to be detected is calculated by the control module 40;
the driving module 10 advances the stroke and strobes 1-1, the two-position three-way valve element 22 is electrified to be connected with the normally closed end, the two-position three-way valve element 25 is electrified to be connected with the normally closed end, the mixed waste liquid enters the reagent waste liquid barrel 289 through the first color comparison detecting unit 5, the two-position three-way valve element 23, the two-position three-way valve element 24, the two-position three-way valve element 25 and the normally open end of the two-position three-way valve element 26, and then the two-position three-way valve element 22 is powered off. Thereby realizing the detection of the silicate concentration of the water sample to be detected.
After silicate of the water sample to be detected is detected, cleaning operation can be performed again, the driving module 10 absorbs travel and gating 1-2, distilled water in the distilled water container unit 8 enters the driving module 10, the driving module 10 advances the travel and gating 1-1, distilled water passes through the buffer ring 7, the two-position three-way valve element 22 is electrified to be connected with a normally closed end, distilled water passes through the two-position three-way valve element 22 to enter the first color detection unit 5, the two-position three-way valve element 23 passes through the two-position three-way valve element 22 to be connected with the normally open end, the two-position three-way valve element 24 is electrified to be connected with the normally closed end, the digestion unit 3, the two-position three-way valve element 25 is electrified to be connected with the normally closed end, the two-position three-way valve element 26 is electrified to be connected with the normally closed end, the distilled water enters the cleaning waste liquid barrel 289A through the two-position three-way valve element 25, then the two-position three-way valve element 24 is controlled to be powered off, and the two-position three-way valve element 25 is powered off.
The driving module 10 absorbs travel and gating 1-2, distilled water in the distilled water container unit 8 enters the driving module 10, the driving module 10 advances the travel and gating 1-1, the two-position two-way valve element 279A is electrified to open and absorb air, the distilled water passes through the buffer ring 7, the two-position three-way valve element 21, the two-position three-way valve element 22, the two-position three-way valve element 23, the two-position three-way valve element 24 and the two-position three-way valve element 25 are electrified, after a period of time, the distilled water reaches the position of the two-position two-way valve element 279A, the driving module 10 absorbs travel and gating 1-1, the distilled water returns to completely pass through the two-position three-way valve element 25, the two-position three-way valve element 279A is powered off, the driving module 10 advances the travel and gating 1-1, the two-position three-way valve element 26 is electrified to be connected with a normally closed end, then enters the cleaning waste liquid barrel 289A through the normally closed end of the two-position three-way valve element 26, and is powered off, and thus the cleaning of the water sample to be detected is completed.
Taking the detection of the concentration of ammonia nitrogen in the water sample to be detected as an example to further explain the scheme, firstly, a rinsing operation is carried out, and the rinsing operation is consistent with the rinsing process before the detection of the concentration of silicate, and is not repeated here.
After rinsing, the detection operation is performed, the driving module 10 sucks the stroke and gates 1-1, the two-position three-way valve 24 is electrified to be connected with a normally closed end, the two-position two-way valve 271 is electrified to be opened to suck the water sample to be detected, the two-position two-way valve 271 is closed, the two-position two-way valve 279A is opened to suck air, the water sample to be detected and the air enter the corrugated tube 29 to be mixed and then run for a certain time, the two-position two-way valve 279A is powered off, the two-position three-way valve 24 is powered off, and the driving module 10 is reset (for example, the driving module 10 is reset by propelling the stroke and gating 1-2);
the driving module 10 absorbs stroke and strobes 1-1, the two-position three-way valve element 24 is electrified to be connected with a normally closed end, the two-position two-way valve element 278 absorbing the phthalic aldehyde/sodium sulfite solution is electrified to be opened, a certain time is absorbed, the valve element 278 is powered off, the two-position two-way valve element 279A is opened to absorb air, the phthalic aldehyde/sodium sulfite solution enters the corrugated pipe 29 through the valve element 278 and is mixed with a water sample to be detected, then enters the digestion unit 3 together, the operation is carried out for a certain time, the valve element 279A is powered off, the two-position three-way valve element 24 is powered off, the metered phthalic aldehyde/sodium sulfite solution enters the digestion unit 3 and ammonia nitrogen in the water sample to be detected are fully mixed, and the driving module 10 is reset;
the driving module 10 absorbs stroke and gating 1-1, the two-position three-way valve element 24 is electrified to be connected with a normally closed end, the two-position two-way valve element 274 absorbing borax-sodium hydroxide solution is electrified to be opened, a certain time is absorbed, the valve element 274 is powered off, the two-position two-way valve element 279A is opened to absorb air, borax-sodium hydroxide solution enters the digestion unit 3 after being mixed by the valve element 274 and enters the corrugated pipe 29, the digestion unit operates for a certain time again, the valve element 279A is powered off, the two-position three-way valve element 24 is powered off, borax-sodium hydroxide solution enters the digestion unit 3 and is fully mixed to generate isoindole derivatives with fluorescence, and the driving module 10 is reset;
the driving module 10 absorbs the stroke and strobes 1-1, the two-position two-way valve element 901 is electrified to open the atmospheric pressure to the digestion unit 3, the two-position three-way valve element 23 is electrified to be connected with the normally closed end, the mixed liquid enters the ultraviolet fluorescence detection unit 4, the valve element 901 is powered off, the two-position three-way valve element 23 is powered off, the fluorescence intensity of fluorescent substances is detected at the maximum excitation wavelength of 362nm and the maximum emission wavelength of 425nm, the fluorescence intensity is in direct proportion to the concentration, and the concentration of ammonia nitrogen in the water sample to be detected is calculated by the control module 40.
The driving module 10 advances the stroke and gates 1-1, the two-position three-way valve 23 is electrified to be connected with the normally closed end, the two-position three-way valve 25 is electrified to be connected with the normally closed end, and the mixed waste liquid enters the reagent waste liquid barrel 289 through the normally open ends of the ultraviolet fluorescence detection unit 4, the two-position three-way valve 24, the two-position three-way valve 25 and the two-position three-way valve 26. The two-position three-way valve member 23 is then de-energized. Thereby realizing the detection of the ammonia nitrogen concentration of the water sample to be detected. After silicate detection of the water sample to be detected, a cleaning operation can be executed again, and the cleaning operation is consistent with the cleaning operation after silicate concentration detection of the water sample to be detected, and is not repeated here.
The liquid inlet part of the water quality detection device based on the microfluidic chip is respectively connected with different liquids (such as water samples and reagents) by a plurality of two-position two-way valve pieces, and is controlled to be on-off, and the metering and liquid inlet are realized by the driving module 10. The flow path is controlled by a plurality of two-position three-way valves, ultraviolet fluorescence detection (such as ammonia nitrogen) can be carried out through the ultraviolet fluorescence detection unit 4, colorimetric detection (such as nitrate nitrogen, nitrite nitrogen, phosphate, silicate, total phosphorus, total nitrogen and the like) can be carried out through the first colorimetric detection unit 5 or the second colorimetric detection unit 6, waste liquid discharge process can divide waste liquid generated by detection reaction into cleaning waste liquid and reagent waste liquid to be discharged through the driving module 10 and the plurality of two-position three-way valves, further reduction of the generation amount of the waste liquid is realized, and as the microfluidic chip is integrated with the valve unit for controlling the liquid flow path, the integration level and the air tightness are greatly improved, so that the device is more stable and reliable in operation.
In addition, the size and the length of a liquid flow path are reduced based on the micro-fluidic chip technology, so that the mixing and the reaction of different liquids are very rapid, the liquid flow path is also very short, the measurement time is fully saved, the amount of liquid reagents is also greatly reduced, the generation amount of reagent waste liquid is correspondingly reduced, and the running and maintenance cost is greatly reduced. The detection of multiple indexes is integrated in one device, and multiple indexes of a water sample can be detected in parallel, for example, total phosphorus, total nitrogen, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, phosphate, silicate, hexavalent chromium and the like. And through arranging the digestion unit 3, the ultraviolet fluorescence detection unit 4, the first colorimetric detection unit 5 and the second colorimetric detection unit 6 outside the microfluidic chip, each unit for detection can be flexibly adjusted according to actual use conditions.
The utility model provides a water quality detection system based on a micro-fluidic chip, which comprises a water quality detection device based on the micro-fluidic chip and a data server, wherein the water quality detection device based on the micro-fluidic chip and the data server are communicated through a wireless electromagnetic communication network or a hydroacoustic communication network, and the data server is used for receiving and storing detection data acquired by the water quality detection device. The data server can be a tower server, a rack server, a blade server, a high-density server and the like.
Preferably, the system further comprises: and the monitoring terminal is connected with the data server communication network, and is used for displaying real-time data according to the detection data, early warning that the water quality detection result exceeds the standard, and detecting the failure of the water quality detection device based on the micro-fluidic chip. The monitoring terminal can display various detection data of the water sample to be detected in real time through the human-computer interaction interface, when the index abnormality exists in the detection data, the monitoring terminal can send out early warning information of water quality abnormality, and when the water quality detection device based on the micro-fluidic chip fails, the monitoring terminal can also send out early warning information of failure. The monitoring terminal can be a smart phone, a personal computer, a notebook computer, a tablet computer and the like.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A microfluidic chip-based water quality detection device, the device comprising: the device comprises a control module, a driving module, a microfluidic chip and a detection module, wherein the control module is respectively in communication connection with the driving module, the microfluidic chip and the detection module, the driving module is connected with the microfluidic chip, the microfluidic chip is connected with the detection module, and the microfluidic chip is integrated with a valve unit for controlling a liquid flow path;
the driving module is used for sucking a water sample to be detected and a detection reagent to enter the detection module through the valve unit; after the detection is finished, the waste liquid generated by the detection module is discharged through the valve unit;
the detection module is used for digesting the water sample to be detected by using the detection reagent and detecting the digested water sample.
2. The microfluidic chip-based water quality detection device according to claim 1, wherein the valve unit comprises a first two-position three-way valve unit, a second two-position three-way valve unit, a third two-position three-way valve unit, a first two-position two-way valve unit and a bellows;
the normally closed end of the first two-position three-way valve unit is connected with one end of the corrugated pipe, the other end of the corrugated pipe is connected with the normally open end of the first two-position three-way valve unit, the normally closed end of the first two-position three-way valve unit is connected with the public end of the second two-position three-way valve unit, the public end of the first two-position three-way valve unit is connected with the normally open end of the third two-position three-way valve unit, the normally open end of the third two-position three-way valve unit is connected with the output end of the detection module, and the normally closed end of the third two-position three-way valve unit is connected with the input end of the detection module.
3. The microfluidic chip-based water quality detection device according to claim 2, wherein the third two-position three-way valve unit comprises a first two-position three-way valve element, a second two-position three-way valve element, a third two-position three-way valve element and a fourth two-position three-way valve element;
the common end of the first two-position three-way valve element is connected with the driving module, the normally open end of the first two-position three-way valve element is connected with the common end of the second two-position three-way valve element, the normally open end of the second two-position three-way valve element is connected with the common end of the third two-position three-way valve element, the normally open end of the third two-position three-way valve element is connected with the common end of the fourth two-position three-way valve element, and the normally open end of the fourth two-position three-way valve element is connected with the common end of the first two-position three-way valve unit.
4. The microfluidic chip-based water quality detection device according to claim 3, wherein the detection module comprises a digestion unit, an ultraviolet fluorescence detection unit, a first colorimetric detection unit and a second colorimetric detection unit;
the output end of the digestion unit is connected with the normally open end of the fourth two-position three-way valve element, and the input end of the digestion unit is connected with the normally closed end of the fourth two-position three-way valve element;
the output end of the ultraviolet fluorescence detection unit is connected with the normally open end of the third two-position three-way valve element, and the input end of the ultraviolet fluorescence detection unit is connected with the normally closed end of the third two-position three-way valve element;
the output end of the first color comparison detection unit is connected with the normally open end of the second two-position three-way valve element, and the input end of the first color comparison detection unit is connected with the normally closed end of the second two-position three-way valve element;
the output end of the second colorimetric detection unit is connected with the normally open end of the first two-position three-way valve element, and the input end of the second colorimetric detection unit is connected with the normally closed end of the first two-position three-way valve element.
5. The microfluidic chip-based water quality detection device according to claim 2, further comprising a cleaning waste liquid barrel and a reagent waste liquid barrel, wherein the normally open end of the second two-position three-way valve unit is connected with the reagent waste liquid barrel, and the normally closed end of the second two-position three-way valve unit is connected with the cleaning waste liquid barrel.
6. The microfluidic chip-based water quality detection device according to claim 2, further comprising a second two-position two-way valve unit, wherein the second two-position two-way valve unit is connected with the normally closed end of the first two-position two-way valve unit, and the second two-position two-way valve unit is used for controlling air to enter the microfluidic chip.
7. The microfluidic chip-based water quality detection device according to claim 2, wherein the first two-position two-way valve unit comprises more than two-position two-way valve members, and the two-position two-way valve members are used for controlling the water sample to be detected and the detection reagent to enter the microfluidic chip.
8. The microfluidic chip-based water quality testing device according to claim 1, further comprising a buffer ring, wherein the driving module is connected to the microfluidic chip through the buffer ring.
9. The microfluidic chip-based water quality testing device according to claim 1, further comprising a distilled water container unit connected to the driving module.
10. The microfluidic chip-based water quality detection device according to claim 1, further comprising a wireless communication unit electrically connected to the control module, wherein the wireless communication unit comprises a wireless electromagnetic communication unit or an underwater acoustic communication unit.
11. A microfluidic chip-based water quality detection system, characterized in that the system comprises at least one microfluidic chip-based water quality detection device according to any one of claims 1-10 and a data server, wherein the microfluidic chip-based water quality detection device and the data server communicate via a wireless electromagnetic communication network or an underwater acoustic communication network.
12. The microfluidic chip-based water quality testing system according to claim 11, wherein the system further comprises: and the monitoring terminal is connected with the data server communication network.
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