CN213843016U

CN213843016U - Water quality analyzer

Info

Publication number: CN213843016U
Application number: CN202022223543.3U
Authority: CN
Inventors: 谢佳裕; 杨建洪; 陈总威; 张全良; 卢梓见; 乔新元; 卢晋旗
Original assignee: Shenzhen Lightsun Technology Co ltd
Current assignee: Shenzhen Lightsun Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-30
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a water quality analyzer, which comprises a water path board component, a peristaltic pump, a three-way valve and a colorimetric component, wherein the water path board component comprises a water path board and a plurality of electromagnetic valves arranged on the water path board, the water path board is provided with a flow channel, a water sample interface, a reagent interface, a cleaning liquid interface and a fluid outlet, and the electromagnetic valves are used for controlling the on-off of each interface and the flow channel; the peristaltic pump is connected with the fluid outlet; the three-way valve comprises an inlet, a first outlet and a second outlet, the inlet is connected with the peristaltic pump, and the first outlet is used for discharging waste liquid after cleaning the circuit board assembly; the colorimetric component is connected with the second outlet and is used for digestion and absorbance detection of the water sample; wherein, the waterway board component is also provided with a waste discharge port which is used for discharging waste liquid after the colorimetric component is cleaned. The utility model discloses a water quality analyzer, the waste liquid of wasing water route board subassembly can not cause the pollution to the contrast colour subassembly, can improve the accuracy of testing result.

Description

Water quality analyzer

Technical Field

The utility model relates to a water quality testing field especially relates to water quality analyzer.

Background

Nutritive salts are the essential material basis for the growth of marine phytoplankton. The different concentrations and compositions of nutritive salts in seawater affect the primary productivity of the ocean and produce a regulating effect on the community structure of phytoplankton, thereby affecting the structure of the marine ecosystem. In normal seawater, a proper amount of nutritive salt can promote the reproduction and growth of organisms, but excessive nutritive salt can promote the rapid reproduction of some marine organisms, so that dissolved oxygen in seawater is greatly consumed, oxygen deficiency is caused in the seawater, and a great amount of death of fishes, shrimps, crabs and shellfish is caused. The pollution of organic matter and nutrient salts to the ocean is now referred to as "eutrophication". Understanding the spatial and temporal distribution and change of nutritive salt in the ocean is of great significance to understanding the key process of the ocean ecosystem and evaluating and controlling the eutrophication of the ocean water body. Nutritive salts in seawater are essential components for the growth and reproduction of marine phytoplankton, and are also the basis of marine primary productivity and the food chain. Therefore, the content of nutritive salt in seawater is an important parameter for marine ecological environment monitoring, and is one of marine routine projects for marine monitoring.

Based on this, multiple water quality analyzers appear in the market for the analysis of nutritive salt content in quality of water, water quality analyzer will carry out the washing of liquid way before water sample detects, and current water quality analyzer's cleaning system remains impurity in the liquid way easily, leads to the measured data inaccurate.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses a water quality analyzer.

The utility model discloses a water quality analyzer, include:

the water channel board is provided with a flow channel, a water sample interface, a reagent interface, a cleaning liquid interface and a fluid outlet, and the electromagnetic valve is used for controlling the connection or disconnection of each interface and the flow channel;

a peristaltic pump connected to the fluid outlet;

the three-way valve comprises an inlet, a first outlet and a second outlet, the inlet is connected with the peristaltic pump, and the first outlet is used for discharging waste liquid after the waterway plate assembly is cleaned;

the colorimetric component is connected with the second outlet and is used for detecting the absorbance of a water sample;

wherein, the water route board subassembly still is equipped with the waste discharge mouth, the waste discharge mouth is used for discharging the washing waste liquid behind the color comparison subassembly.

According to the above technical scheme, the utility model discloses a water quality analyzer, through setting up the three-way valve, the waste liquid after wasing the water route board subassembly is discharged from the first export of three-way valve, and the waste liquid after wasing the color comparison subassembly is discharged from the waste discharge outlet, promptly, washs the waste liquid after the water route board subassembly and can not lead to the fact the pollution to the color comparison subassembly through the color comparison subassembly to can improve the accuracy of testing result. In addition, the cross-sectional area of the flow channel of the water circuit board is small, so that the using amount and the discharge amount of the reagent are small, the effects of saving resources and reducing pollution can be achieved, in addition, the reagent residue is small, the cross contamination can be effectively reduced, and the accuracy of the measuring result is improved. Furthermore, compared with the existing mode of adopting a multi-way valve, the water channel plate has smaller volume, can effectively reduce the volume of the whole water quality analyzer, and reduces the occupied space.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic process diagram of a water quality analyzer provided by the first aspect of the present invention;

fig. 2 is a schematic view of a waterway plate flow channel and an interface provided by the first aspect of the present invention;

fig. 3 is a schematic structural diagram of a water quality analyzer provided by the first aspect of the present invention;

FIG. 4 is an exploded schematic view of the structure shown in FIG. 3;

fig. 5 is a schematic block diagram of a liquid path cleaning method of a water quality analyzer according to a second aspect of the present invention;

fig. 6 is a schematic block diagram of a water quality analyzing method of a water quality analyzer according to a third aspect of the present invention;

FIG. 7 is a detailed schematic diagram of a first substep of the water quality analysis method of the water quality analyzer shown in FIG. 6;

FIG. 8 is another detailed schematic diagram of a first substep of the water quality analysis method of the water quality analyzer shown in FIG. 6;

fig. 9 is a detailed schematic diagram of a second substep in the water quality analyzing method of the water quality analyzer shown in fig. 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Referring to fig. 1-2, a first aspect of the present invention provides a water quality analyzer, which includes a waterway plate assembly 10, a peristaltic pump 20, a three-way valve 30 and a colorimetric assembly 40, wherein the waterway plate assembly 10 includes a waterway plate 11 and a plurality of solenoid valves (not shown) installed on the waterway plate, the waterway plate 11 is provided with a flow channel 111, a water sample interface 112, a reagent interface 113, a cleaning solution interface 114 and a fluid outlet 115, the solenoid valves are used for controlling the connection or disconnection between the interfaces and the flow channel 111, the peristaltic pump 20 is connected with the fluid outlet 115, the three-way valve 30 includes an inlet 31, a first outlet 32 and a second outlet 33, the inlet 31 is connected with the peristaltic pump 20, the first outlet 32 is used for discharging waste liquid after cleaning the waterway plate assembly 10, the colorimetric assembly 40 is connected with the second outlet 33, and the colorimetric assembly 40 is used for detecting the absorbance of the water sample; wherein, the waterway plate assembly 10 is further provided with a waste discharge port 116, and the waste discharge port 116 is used for discharging waste liquid after the colorimetric assembly 40 is cleaned. Specifically, the waste liquid after washing the colorimetric member 40 can be reversely moved to the waste outlet 116 by the peristaltic pump 20 and discharged from the waste outlet 116.

After the technical scheme is adopted, by arranging the three-way valve 30, the waste liquid after the water channel plate assembly 10 is cleaned is discharged from the first outlet 32 of the three-way valve 30, and the waste liquid after the color comparison assembly 40 is cleaned is discharged from the waste discharge port 116, namely, the waste liquid after the water channel plate assembly 10 is cleaned does not pass through the color comparison assembly 40, and the color comparison assembly 40 is not polluted, so that the accuracy of a detection result can be improved. In addition, the cross-sectional area of the flow channel of the water channel plate 11 is small, so that the use amount and the discharge amount of the reagent are small, the effects of saving resources and reducing pollution can be achieved, in addition, the reagent residue is small, the cross contamination can be effectively reduced, and the accuracy of the measurement result is improved. Further, compared with the existing mode of adopting the multi-way valve, the water path plate 11 has smaller volume, the volume of the whole water quality analyzer can be effectively reduced, and the occupied space is reduced.

The utility model provides a water quality analyzer can be arranged in the content and CODmn (permanganate index) of components such as ammonia nitrogen, total phosphorus, silicate, phosphate, nitrate, nitrite in the analysis water sample.

In an alternative embodiment, the waterway plate 11 is a waterway plate made of acrylic material. The acrylic material is convenient to clean, and is not easy to leave reagent residues, so that cross contamination can be effectively reduced. Of course, the material of the water channel plate is not limited to acrylic material, and other materials such as metal and ceramic can be used.

In an optional embodiment, the waterway plate 11 is provided with a plurality of sets of three-way interfaces 12, each set of three-way interfaces 12 includes a common interface 121, a left interface 122 and a right interface 123, and the electromagnetic valve is used for controlling the left interface 122 or the right interface 123 to communicate with the common interface 121; the plurality of sets of three-way interfaces 12 are connected in series through the flow channel 111, wherein the common interface 121 of the former set is communicated with the left interface 122 or the right interface 123 of the latter set, the rest left interface 122 or the right interface 123 is selectively used as a water sample interface, a cleaning solution interface or a reagent interface, and the common interface 121 of the last set of three-way interfaces 12 is connected with the peristaltic pump 20.

In an alternative embodiment, either the left port 122 or the right port 123 of the last set of three-way ports 12 is used as the waste port 116. With this design, through using the left interface or the right interface of a last group of tee bend interface as the exhaust mouth, like this, wash the waste liquid behind the color comparison subassembly 40 and can not pass through preceding several groups of tee bend interfaces and runners, avoided cross contamination effectively.

In an alternative embodiment, the cleaning solution port 114 includes a pure water port 1141 and a cleaning agent port 1142, one of the left port 122 and the right port 123 of the first set of three-way ports 12 is used as the cleaning agent port 1142, and one of the left port 122 and the right port 123 of the second set of three-way ports 12 is used as the pure water port 1141. With this design, through using one of the left interface 122 and the right interface 123 of the first set of tee joint interface 12 as the cleaning agent interface 1142, like this, when carrying out the washing of water route board subassembly 10 and color comparison subassembly 40, the flow channel that the cleaning agent can maximize through whole water route board subassembly 10 to with whole water route board subassembly 10 sanitization, avoid remaining the liquid to cause the influence to the testing result. Similarly, the reason why one of the left connector 122 and the right connector 123 of the second set of three-way connectors 12 is used as the pure water connector 1141 is also considered above, and the description thereof is omitted here.

In an alternative embodiment, the waterway plate 11 is further provided with an air interface 117, and the other of the left interface 122 and the right interface 123 of the first set of three-way interfaces 12 is used as the air interface 117. The air interface 117 is used to blow air into the waterway plate 11 to drive the liquid in the waterway plate 11 into the colorimetric assembly 40. In this design, by using the other of the left port 122 and the right port 123 of the first set of three-way ports 12 as the air port 117, the air can maximally purge the liquid in the flow channel 111 into the colorimetric assembly 40, reduce the residual liquid in the flow channel, and effectively avoid cross contamination.

In an alternative embodiment, the waterway plate 11 is further provided with a standard liquid interface 118, the standard liquid interface 118 is used for connecting a standard liquid tank, and the standard liquid is used for calibrating the detected component before detection.

Illustratively, the waterway plate 11 is provided with twelve groups of three-way connectors, the twelve groups of three-way connectors are arranged in two rows, and optionally, each row is provided with six groups of three-way connectors. A common interface of the first group of three-way interfaces 12a is connected with a left interface of the second group of three-way interfaces 12b, the left interface of the first group of three-way interfaces 12a is used as an air interface, and the right interface of the first group of three-way interfaces 12a is used as a cleaning liquid interface; a common interface of the second group of three-way interfaces 12b is connected with a left interface of the third group of three-way interfaces 12c, and a right interface of the second group of three-way interfaces 12b is used as a pure water interface; a common interface of the third group of three-way interfaces 12c is connected with a left interface of the fourth group of three-way interfaces 12d, and a right interface of the third group of three-way interfaces 12c is used as a water sample interface; a common interface of the fourth group of three-way interfaces 12d is connected with a left interface of the fifth group of three-way interfaces 12e, and a right interface of the fourth group of three-way interfaces 12d is used as a standard liquid interface; a common interface of the fifth group of three-way interfaces 12e is connected with a left interface of the sixth group of three-way interfaces 12f, and a right interface of the fifth group of three-way interfaces 12e is used as a first reagent interface; a common interface of the sixth group of three-way interfaces 12f is connected with a right interface of the seventh group of three-way interfaces 12g, and the right interface of the sixth group of three-way interfaces 12f is used as a second reagent interface; a public interface of the seventh group of three-way interfaces 12g is connected with a right interface of the eighth group of three-way interfaces 12h, and a left interface of the seventh group of three-way interfaces 12g is used as a third reagent interface; a common interface of the eighth group of three-way interfaces 12h is connected with a right interface of the ninth group of three-way interfaces 12i, and a left interface of the eighth group of three-way interfaces 12h is used as a fourth reagent interface; a public interface of the ninth group of three-way interfaces 12i is connected with a right interface of the tenth group of three-way interfaces 12j, and a left interface of the ninth group of three-way interfaces 12i is used as a fifth reagent interface; the middle interface of the tenth group of three-way interfaces 12j is connected with the right interface of the eleventh group of three-way interfaces 12k, and the left interface of the tenth group of three-way interfaces 12j is used as a second reagent interface; a public interface of the eleventh group of three-way interfaces 12k is connected with a right interface of the twelfth group of three-way interfaces 12l, and a left interface of the eleventh group of three-way interfaces 12k is used as a standby interface; the common port of the twelfth set of three-way ports 12l is used as a fluid outlet, and the left port of the twelfth set of three-way ports 12l is used as a waste discharge port.

It should be noted that, when the water quality analyzer is used for detecting the contents of two nutrient salts, namely nitrate and nitrite, the left interface of the eleventh three-way interface 12k may be connected to the ultraviolet digestion tube or the cadmium column, and the ultraviolet digestion tube and the cadmium column are used for reducing nitrate into nitrite.

It should be noted that, the six reagent interfaces are not necessarily used in their entirety, and according to the actual use situation, only four of the six reagent interfaces may be used, and the remaining two reagent interfaces are used as spares.

In an alternative embodiment, the colorimetric assembly 40 comprises a transparent tube 41, a light source 42 and a photoelectric sensor 43, the transparent tube 41 is communicated with the second outlet 33, the light source 42 is disposed on one side of the transparent tube 41, the photoelectric sensor 43 is disposed on the other side of the transparent tube 41, the light source 42 is configured to emit light to irradiate the liquid in the transparent tube 41, and the photoelectric sensor 43 is configured to receive the light passing through the transparent tube 41 and form a photoelectric signal. This setting mode will mix and colorimetric detection closes as an organic whole, has reduced water quality analyzer's volume, can effectively shorten the flow path moreover, reduces the quantity of reagent, reduces the waste liquid and discharges. Alternatively, the transparent tube 41 is made of quartz material.

In an alternative embodiment, the colorimetric assembly 40 further comprises a heating assembly (not shown), a first high-pressure valve 44 and a second high-pressure valve 45, wherein the first high-pressure valve 44 is connected to the bottom end of the transparent tube 41 and the second outlet 33, the second high-pressure valve 45 is connected to the top end of the transparent tube 41, and the heating assembly is used for heating the liquid in the transparent tube 41. This setting mode has integrateed in mixing and colorimetric detection and has cleared up the subassembly, has reduced water quality analyzer's volume.

When the device is used, the mixed liquid is driven into the digestion tube 41 to be mixed, the first high-pressure valve 42 and the second high-pressure valve 43 are closed, the mixed liquid in the digestion tube 41 is heated to 120-125 ℃, the temperature is kept for a period of time, then the digestion tube 41 is cooled to about 40 ℃, the light source 42 emits light to irradiate the liquid in the transparent tube 41, and the photoelectric sensor 43 receives the light which passes through the transparent tube 41 and forms a photoelectric signal to obtain the absorbance value of the mixed liquid.

Referring to fig. 3-4, in an alternative embodiment, the water quality analyzer includes an upper housing 50, a lower housing 60, a partition 70 and a vertical plate 80, the lower housing 60 is mounted at the bottom of the upper housing 50, the lower housing 60 has a lower chamber 61, and the lower chamber 61 is used for accommodating one or more of a reagent tank, a purified water tank, a cleaning solution tank and a standard solution tank. The upper housing 50 has an inner cavity 51, and the partition 70 divides the inner cavity 51 into an upper chamber 511 and a middle chamber 512, the upper chamber 511 being used for mounting electrical components. In middle chamber 512 was located to riser 80, one side and the upper casing 50 of riser 80 rotated and is connected, and waterway board subassembly 10, color comparison subassembly 40, peristaltic pump 20 and three-way valve are all installed in riser 80. With this design, through installing electrical component in last cavity 511, place one or more in reagent jar, pure water jar, cleaning solution jar, the standard solution jar in cavity 61 down, locate middle cavity 512 with waterway board subassembly 10, color comparison subassembly 40, peristaltic pump 20 and three-way valve, rationally distributed, avoid producing electrical problem. In addition, through set up riser 80 at middle cavity 512, one side and the upper casing 50 of riser 80 are rotated and are connected, make things convenient for the dismouting and the maintenance of waterway board subassembly 10, color comparison subassembly 40, peristaltic pump 20 and three-way valve.

Referring to fig. 1-2 and fig. 5, a second aspect of the present invention provides a method S100 for cleaning a liquid path of a water quality analyzer, where the water quality analyzer includes a water path plate assembly 10, a peristaltic pump 20, a three-way valve 30 and a colorimetric assembly 40, the water path plate assembly 10 includes a water path plate 11 and a plurality of electromagnetic valves (not shown) installed on the water path plate 11, the water path plate 11 is provided with a flow channel 111, a water sample interface 112, a reagent interface 113, a cleaning liquid interface 114 and a fluid outlet 115, and the electromagnetic valves are used for controlling connection or disconnection between each interface and the flow channel 111; peristaltic pump 20 is connected to fluid outlet 115; the three-way valve 30 comprises an inlet 31, a first outlet 32 and a second outlet 33, wherein the inlet 31 is connected with the peristaltic pump 20; the colorimetric component 40 is connected with the second outlet 33, and the colorimetric component 40 is used for absorbance detection of a water sample; the waterway plate assembly 10 is further provided with a waste discharge port 116;

the method S100 for cleaning the liquid path of the water quality analyzer includes:

s10, receiving a cleaning signal;

s20, closing the second outlet 33 of the three-way valve 30, the peristaltic pump 20 pumping the cleaning solution through the cleaning solution port 114 to clean the circuit board assembly 10, and the waste solution after cleaning is discharged from the first outlet 32 of the three-way valve 30;

s30, the first outlet 32 of the three-way valve 30 is closed, the peristaltic pump 20 pumps the cleaning solution through the cleaning solution interface 114 to clean the colorimetric assembly 40, after cleaning, the peristaltic pump 20 is reversed, and the waste solution flows from the colorimetric assembly 40 to the waterway plate assembly 10 and is discharged from the waste discharge port 116.

After the technical scheme is adopted, the waste liquid after the water channel plate assembly 10 is cleaned is discharged from the first outlet 32 of the three-way valve 30, and the waste liquid after the color comparison assembly 40 is cleaned is discharged from the waste discharge port 116, so that the waste liquid after the water channel plate assembly 10 is cleaned does not pass through the color comparison assembly 40, the color comparison assembly 40 is not polluted, and the accuracy of a detection result can be improved.

In an alternative embodiment, the cleaning solution interface 114 includes a pure water interface 1141 and a cleaning agent interface 1142, and the method S100 for cleaning a fluid path of a water quality analyzer includes:

before detecting the content of the detected components in the water sample, executing the following liquid path cleaning steps:

the second outlet 33 of the three-way valve 30 is closed, the peristaltic pump 20 pumps pure water to clean the circuit board assembly 10 through the pure water port 1141, and the cleaned waste liquid is discharged from the first outlet 32 of the three-way valve 30;

closing the first outlet 32 of the three-way valve 30, pumping pure water by the peristaltic pump 20 through the pure water port 1141 to clean the colorimetric assembly 40, after cleaning, reversing the peristaltic pump 20, and discharging waste liquid from the colorimetric assembly 40 to the waterway plate assembly 10 and from the waste discharge port 116;

after the content of the detected components in the water sample is detected, the following liquid path cleaning steps are carried out:

the second outlet 33 of the three-way valve 30 is closed, the peristaltic pump 20 pumps cleaning agent through the cleaning agent interface 1142 to clean the circuit board assembly 10, and the cleaned waste liquid is discharged from the first outlet 32 of the three-way valve 30;

the first outlet 32 of the three-way valve 30 is closed, the peristaltic pump 20 pumps the cleaning agent through the cleaning agent port 1142 to clean the colorimetric assembly 40, after cleaning, the peristaltic pump 20 is reversed, and the waste liquid flows from the colorimetric assembly 40 to the waterway plate assembly 10 and is discharged from the waste discharge port 116.

After the technical scheme is adopted, the purified water is used for cleaning the circuit board assembly 10 and the colorimetric assembly 40 before the content of the detected components in the detected water sample is detected, and the cleaning agent is used for cleaning the circuit board assembly 10 and the colorimetric assembly 40 after the content of the detected components in the detected water sample is detected, so that the circuit board assembly 10 and the colorimetric assembly 40 can be effectively cleaned, the impurities such as reagents, water samples and the like in a liquid path are avoided, and the accuracy of data detected each time is improved. Moreover, the dosage of the cleaning agent can be saved, the cost is saved, and meanwhile, the discharge amount of the cleaning agent is reduced, and the pollution is reduced.

In an alternative embodiment, after washing with purified water and before pumping in the reagent, the reagent is pumped in the fluid path or a sample of water is pumped in the fluid path for rinsing.

Referring to fig. 1-2 and fig. 6, a third aspect of the present invention provides a water quality analyzing method T100 for a water quality analyzer, where the water quality analyzer includes a waterway board assembly 10, a peristaltic pump 20, and a colorimetric assembly 40, the waterway board assembly 10 includes a waterway board 11 and a plurality of electromagnetic valves (not shown) installed on the waterway board 11, the waterway board 11 is provided with a flow channel 111, a water sample interface 112, a reagent interface 113, and a fluid outlet 115, and the electromagnetic valves are used for controlling connection or disconnection between each interface and the flow channel 111; peristaltic pump 20 is connected to fluid outlet 115; the colorimetric module 40 is communicated with the peristaltic pump 20, and the water quality analysis method T100 of the water quality analyzer comprises the following steps:

t10, mixing the pumped reagent with the water sample filled in the flow channel 111 to obtain a mixed solution;

t20, driving the mixed solution to the colorimetric component 40, and carrying out absorbance detection on the mixed solution in the colorimetric component 40 to obtain an absorbance value;

and T30, analyzing the absorbance value to obtain the content value of the detected component in the water sample.

After the technical scheme is adopted, the water sample is filled in the flow channel 111, and then the reagent is pumped to be mixed with the water sample in the flow channel 111, so that the time for mixing the reagent and the water sample can be effectively shortened, the content detection time of the components to be detected in the water sample is shortened, and the analysis timeliness of the water quality analyzer is improved. Moreover, the process only needs to pump quantitative reagent, no redundant reagent is discharged, the reagent discharge is reduced, the resource is saved, and the pollution is reduced.

Referring to fig. 1-2 and fig. 7, in an alternative embodiment, the pumping reagent is mixed with the water sample in the flow channel 111 to obtain a mixed solution, which includes:

t11, pumping the water sample into the colorimetric component 40, filling the flow channel 111 and the colorimetric component 40 with the water sample;

and T12, pumping the reagent into the flow channel 111 to mix with the water sample to obtain a mixed solution.

Referring to fig. 1-2 and 8, in other embodiments, the pumping reagent is mixed with the water sample in the flow channel 111 to obtain a mixed solution, which includes:

t11', pumping a defined quantity of water sample into the colorimetric module 40;

t12', the peristaltic pump 20 is reversed to drive the water sample in the colorimetric component 40 to fill the pipeline and the flow channel 111 between the colorimetric component 40 and the water channel plate 111;

t13', pumping the reagent into the flow channel 111 to mix with the water sample, and obtaining the mixed solution.

Wherein the pumping of a fixed amount of water sample can be controlled by the rotation speed and time of the peristaltic pump 20.

In an optional embodiment, the waterway plate 11 is further provided with an air interface 117, and after the pumped reagent is mixed with the water sample in the flow channel, the water quality analysis method of the water quality analyzer further includes:

air is blown through the air port 117 to drive the mixed solution into the colorimetric module 40.

Referring to fig. 9, in an alternative embodiment, the waterway plate 11 is further provided with a pure water port 1141, and before the peristaltic pump 20 is reversed, the method for analyzing the water quality of the water quality analyzer further includes:

detecting the concentration of the detected component in the water sample;

when the concentration of the detected component is greater than the preset value, pumping quantitative purified water into the colorimetric component to dilute the water sample.

The purpose of setting up this step lies in, when the concentration of the detected composition is too high in the water sample, has surpassed the threshold value that detects, can lead to the detected data inaccurate, dilutes the concentration of the detected composition of water sample to normal value, does benefit to the detection, improves the degree of accuracy of data.

Referring to fig. 1-2 and 9, in an alternative embodiment, the colorimetric assembly 40 includes a transparent tube 41, a light source 42, a photoelectric sensor 43, a heating assembly (not shown), a first high-pressure valve 44 and a second high-pressure valve 45, the first high-pressure valve 44 is connected to the bottom end of the transparent tube 41 and the peristaltic pump 20, the second high-pressure valve 45 is connected to the top end of the transparent tube 41, the light source 42 is disposed on one side of the transparent tube 41, the photoelectric sensor 43 is disposed on the other side of the transparent tube 41, the heating assembly is configured to heat the liquid in the transparent tube 41, the light source 42 is configured to emit light to irradiate the liquid in the transparent tube 41, and the photoelectric sensor 43 is configured to receive the light passing through the transparent tube 41 and form a photoelectric signal;

the detecting the absorbance of the mixed solution in the colorimetric module 40 to obtain the absorbance value includes:

t21, closing the first high pressure valve 44 and the second high pressure valve 45;

t22, starting the heating assembly to heat the liquid in the transparent tube 41 to a preset temperature value, and performing water sample digestion;

t23, after digesting the preset time, cooling the liquid to a preset temperature value;

and T24, starting the light source 42 and the photoelectric sensor 43 to detect the absorbance of the liquid in the transparent tube 41, and obtaining an absorbance value.

In an alternative embodiment, the starting of the heating assembly heats the liquid in the transparent tube 41 to a preset temperature value, and the performing of the digestion of the water sample comprises:

starting the heating assembly to heat the liquid in the transparent tube 41 to 120-125 ℃ to digest the water sample.

In an optional embodiment, the water quality analysis method S20 of the water quality analyzer further includes:

the waterway plate assembly 10 and the colorimetric assembly 40 are cleaned before and after detecting the content of the detected component in the water sample.

In an optional embodiment, the water quality analyzer further comprises a three-way valve 30, the three-way valve 30 comprises an inlet 31, a first outlet 32 and a second outlet 33, the inlet 31 is connected with the peristaltic pump 20, the second outlet 33 is connected with the colorimetric assembly 40, and the water path plate is further provided with a cleaning solution interface 114 and a waste discharge port 116;

the cleaning of the waterway board assembly 10 and the colorimetric assembly 40 includes:

receiving a cleaning signal;

the second outlet 32 of the three-way valve 30 is closed, the peristaltic pump 20 pumps the cleaning liquid through the cleaning liquid interface 114 to clean the circuit board assembly 10, and the cleaned waste liquid is discharged from the first outlet 32 of the three-way valve 30;

the first outlet 31 of the three-way valve 30 is closed, the peristaltic pump 20 pumps the cleaning solution through the cleaning solution port 114 to clean the colorimetric assembly 40, after cleaning, the peristaltic pump 20 is reversed, and the waste solution flows from the colorimetric assembly 40 to the waterway plate assembly 10 and is discharged from the waste discharge port 116.

After the technical scheme is adopted, the waste liquid after the water channel plate assembly 10 is cleaned is discharged from the first outlet 32 of the three-way valve 30, the waste liquid after the color comparison assembly 40 is cleaned is discharged from the waste discharge port 116, the waste liquid after the water channel plate assembly 10 is cleaned cannot pass through the color comparison assembly 40, the color comparison assembly 40 cannot be polluted, and therefore the accuracy of a detection result can be improved.

In an alternative embodiment, the cleaning solution interface 114 includes a pure water interface 1141 and a cleaning agent interface 1142, and before detecting the content of the detected component in the water sample, the following cleaning steps are performed:

the first outlet 32 of the three-way valve 30 is closed, the peristaltic pump 20 pumps pure water through the pure water port 1141 to clean the colorimetric assembly 40, after cleaning, the peristaltic pump 20 is reversed, and waste liquid flows from the colorimetric assembly 40 to the waterway plate assembly 10 and is discharged from the waste discharge port 116.

After the content of the detected components in the water sample is detected, the following cleaning steps are carried out:

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A water quality analyzer, comprising:

a peristaltic pump connected to the fluid outlet;

2. The water quality analyzer according to claim 1, wherein the water board is provided with a plurality of sets of three-way interfaces, each set of three-way interfaces comprises a common interface, a left interface and a right interface, and the electromagnetic valve is used for controlling the left interface or the right interface to be communicated with the common interface; the three-way interfaces are connected in series through the flow channels, the public interface of the front group is communicated with the left interface or the right interface of the rear group, the rest left interface or the right interface is selectively used as a water sample interface, a cleaning liquid interface or a reagent interface, and the public interface of the three-way interface of the last group is connected with the peristaltic pump.

3. The water quality analyzer of claim 2, wherein the left port or the right port of the last group of the three-way ports is used as the waste discharge port.

4. The water quality analyzer according to claim 2, wherein the cleaning solution interface comprises a pure water interface and a cleaning agent interface, one of the left interface and the right interface of the first set of three-way interfaces is used as the cleaning agent interface, and one of the left interface and the right interface of the second set of three-way interfaces is used as the pure water interface.

5. The water quality analyzer of claim 4, wherein the water board is further provided with an air interface, and the other of the left interface and the right interface of the first set of the three-way interfaces is used as the air interface.

6. The water quality analyzer of claim 1, wherein the colorimetric assembly comprises a transparent tube, a light source and a photoelectric sensor, the transparent tube is communicated with the second outlet, the light source is arranged on one side of the transparent tube, the photoelectric sensor is arranged on the other side of the transparent tube, the light source is used for emitting light to irradiate the liquid in the transparent tube, and the photoelectric sensor is used for receiving the light passing through the transparent tube and forming a photoelectric signal.

7. The water quality analyzer of claim 6, wherein the colorimetric assembly further comprises a heating assembly, a first high pressure valve and a second high pressure valve, the first high pressure valve is connected with the bottom end of the transparent tube and the second outlet, the second high pressure valve is connected with the top end of the transparent tube, and the heating assembly is used for heating the liquid in the transparent tube.

8. The water quality analyzer according to claim 1, wherein the water quality analyzer comprises an upper casing, a lower casing, a partition plate and a vertical plate, the lower casing is mounted at the bottom of the upper casing, the lower casing is provided with a lower chamber, the lower chamber is used for containing one or more of a reagent tank, a purified water tank, a cleaning liquid tank and a standard solution tank, the upper casing is provided with an inner cavity, the partition plate divides the inner cavity into an upper chamber and a middle chamber, the upper chamber is used for mounting an electrical component, the vertical plate is arranged in the middle chamber, one side of the vertical plate is rotatably connected with the upper casing, and the waterway plate component, the colorimetric component, the peristaltic pump and the three-way valve are mounted on the vertical plate.