CN215641193U - Dynamic adding mark water quality on-line quality control instrument - Google Patents
Dynamic adding mark water quality on-line quality control instrument Download PDFInfo
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- CN215641193U CN215641193U CN202121704633.2U CN202121704633U CN215641193U CN 215641193 U CN215641193 U CN 215641193U CN 202121704633 U CN202121704633 U CN 202121704633U CN 215641193 U CN215641193 U CN 215641193U
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Abstract
The utility model provides a dynamic-labeling online quality control instrument for water quality, wherein a labeling component of the dynamic-labeling online quality control instrument consists of an injection pump, a three-way valve, a liquid storage ring and a first valve group; three ports of the three-way valve are respectively connected with the injection pump, the liquid storage ring and the water injection port; the other end of the liquid storage ring is connected with a first valve bank; the first valve group is respectively used for connecting the standard liquid adding bottle, the air inlet, the waste liquid outlet and the sampling cup. The liquid storage ring is introduced as an intermediate storage link, small-segment air isolation is adopted, the phenomenon that standard liquid directly enters the cavity of the injection pump is avoided, and cross contamination of different liquids is avoided. Therefore, high-concentration standard liquid can be matched, and the high-precision injection pump directly changes the standard adding volume to realize dynamic standard adding. Meanwhile, the special sampling cup structural design is adopted, and the problems of errors and inconvenient cleaning are solved.
Description
Technical Field
The utility model relates to the technical field of water quality environment monitoring and water quality control instruments, in particular to a dynamic standard-added water quality online quality control instrument.
Background
In the process of water quality monitoring, if the variation of measured values at different moments is large, a superior management platform cannot judge whether the measured values are caused by the influence of external conditions or the self problems of a water quality analyzer or the water quality is changed greatly, if verification is required, a water sample measured on site must be obtained for benchmarking analysis and comparison, manual sampling and benchmarking comparison or remote automatic sampling and benchmarking comparison can be carried out, and equipment for measuring the water quality analyzer by the remote automatic sampling and benchmarking comparison is a remote automatic quality control instrument; when the quality control instrument carries out the standard adding recovery detection, the amount of added substances (namely the standard adding amount) needs to be dynamically changed according to the difference of the concentrations of the substances contained in the water sample on site; the quality control instrument can realize remote quality control of water quality monitoring data, ensure that a monitoring result can be verified, and ensure that the whole water quality monitoring system can improve the discrimination of data validity through the remote automatic quality control instrument, thereby really knowing the water quality condition on site.
1) The existing quality control instrument adopts a combination of a multi-channel switching valve and a metering peristaltic pump to realize the metering and transmission of a water sample and a standard solution, the metering peristaltic pump clamps a section of liquid in a pump pipe by using rollers, the liquid is pushed to one end, the rollers roll continuously and repeatedly, continuous liquid flows to one end, and the amount of the liquid flowing through the peristaltic pump pipe is metered according to the pipe diameter of the peristaltic pump pipe and timing. The other part adopts the combination of a multi-channel switching valve and a plunger pump to realize the metering and transmission of water samples and standard solutions, the plunger pump is like a syringe, a piston is arranged in the plunger pump, a stepping motor drives the piston to absorb liquid into the syringe of the plunger pump, the piston pushes the liquid into a sample preparation cup, and in the process, the liquid flows through the syringe of the plunger pump and contacts with the piston.
2) The existing quality control instrument uses one sample preparation cup and four mother solution cups to prepare standard solutions of four different substances in different time intervals, and then the standard solutions are respectively stored in the four standard sample cups, one quality control instrument is matched with four water quality analyzers for use, the pipelines are multiple and complex, cross contamination is particularly easy to generate, many steps can not be carried out simultaneously, the dynamic standard preparation and sample supply period is long, and the standard solutions are not matched with the actual use condition of the water quality analyzer on site.
3) The quantitative cup that current quality control appearance used when adding mark recovery is simple cylindrical mostly, and the liquid level cross-sectional area is great, if the field installation does not accomplish completely horizontally, then the liquid level slope will lead to the ration volume inaccurate.
The prior art mainly has the following defects:
the measurement precision of measurement peristaltic pump is relatively poor, and along with the live time passes, peristaltic pump pipe elasticity changes moreover, and wearing and tearing gradually, ageing scheduling problem can aggravate and reduce its accuracy of measurement to make in the recovery process of adding the mark, add the accuracy of scalar and be lower.
When the plunger pump pushes and discharges liquid, a gap is still formed between the piston and the top end of the needle cylinder when the piston reaches the bottom, different liquids flow through the inside of the plunger pump and are in contact with the piston, the processes of sucking and pushing the inner wall of the needle cylinder and the piston at each time can have residues, and the problem of cross contamination of solutions of different substances exists.
When the same sample preparation cup is used for preparing the standard solutions of four different substances at different time intervals, the sample preparation cup must have residues of the previous sample preparation, and the sample preparation cup cannot be completely cleaned even if being cleaned by pure water. When one quality control instrument is matched with four water quality analyzers for use, the pipelines are more, the complexity is high, cross contamination is easy to generate, and water and electricity separation is difficult to make.
The cross section area of the liquid surface of the quantitative cup is large, the quantitative volume is easy to deviate greatly due to slight inclination in installation, and then the error of calculation of the standard recovery rate is increased.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects and shortcomings in the prior art, the utility model provides a novel dynamic labeling online quality control instrument for water quality, a liquid storage ring is introduced as an intermediate storage link, small-segment air isolation is adopted, the condition that labeling liquid directly enters a cavity of an injection pump is avoided, and cross contamination of different liquids is avoided. Therefore, high-concentration standard liquid can be matched, and the high-precision injection pump directly changes the standard adding volume to realize dynamic standard adding. Meanwhile, the special sampling cup structural design is adopted, and the problems of errors and inconvenient cleaning are solved.
The technical scheme is as follows:
the utility model provides a developments add online matter of water quality accuse appearance of mark which characterized in that: the marking assembly consists of an injection pump, a three-way valve, a liquid storage ring and a first valve group; three ports of the three-way valve are respectively connected with the injection pump, the liquid storage ring and the water injection port; the other end of the liquid storage ring is connected with a first valve bank; the first valve group is respectively used for connecting the standard liquid adding bottle, the air inlet, the waste liquid outlet and the sampling cup.
Furthermore, the sampling cup is provided with a hole at a fixed position on the side wall and is connected with a quantitative pump for quantifying the water sample, and the volume of the sampling cup below the quantitative port is a fixed value; the bottom adopts a V-shaped structure, and the quantitative opening adopts a necking structure.
Further, the necking structures are two trapezoid structures which are arranged oppositely.
Furthermore, the bottom cover of the sampling cup is fixed by adopting a hoop to compress.
Further, the bottom of the sampling cup is connected with an air pump through a one-way valve.
Further, the bottom of the sampling cup is connected with an exhaust valve.
Furthermore, the upper part of the sampling cup is connected with a sampling pump and is provided with an overflow water outlet.
Furthermore, the bottom of the sampling cup is connected with two water quality analyzers through a second valve bank and a third valve bank respectively.
The utility model and the optimized proposal thereof can provide a zero standard, a measuring range standard, a water sample and a standard adding mixed sample for the measurement of the water quality analyzer, and can dynamically adjust the amount of the standard adding amount in a certain range according to the concentration of the water sample on site.
Its significant advantages include:
1. in the labeling component, a liquid storage ring with a smooth inner wall is introduced as an intermediate link, pure water is always pumped and discharged in a cavity of the injection pump on the basis of correct operation, and the pure water and different labeling liquids are isolated by small sections of air. This makes the liquid of marking in this scheme can not get into the syringe pump cavity, can not remain liquid in the syringe pump cavity and on the piston, has reduced cross contamination, has improved the precision of adding mark recovery test.
2. In consideration of the fact that the accuracy of the concentration of the standard solution is very important for a quality control system, the high-concentration standard solution is matched by the valve bank, and dynamic standard addition is realized by directly changing the standard addition volume by the high-precision injection pump, so that errors caused by automatic on-site standard preparation are reduced.
3. The bottom of the sampling cup is designed in a V shape, so that a water sample can be thoroughly emptied, less residue is left, and the water sample can be thoroughly and cleanly rinsed, so that the water sample is more representative; the two opposite V-shaped designs (double trapezoids) in the middle of the sampling cup reduce the cross-sectional area of the water surface at the quantitative port, thereby reducing the quantitative value error caused by installation inclination and improving the precision of the added standard recovery test; the bottom cover is pressed and fixed by the hoop, is easy to disassemble, is convenient to maintain and clean, and solves the problem of inconvenient cleaning caused by the design of two opposite V-shaped tops in the sampling cup.
Drawings
The utility model is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic diagram of the overall structure and operation of an embodiment of the present invention;
in the figure: 1-sampling cup; 2-a sample injection pump; 3-a fixed displacement pump; 4-an evacuation valve; 5, an air pump; 6-a one-way valve; 7-a second valve group valve body 1 (zero mark A valve); 8-second valve group valve body 2 (range mark A valve); 9-second valve group valve body 3 (sample A valve); 10-a third valve group 1 (zero mark B valve); 11-a third valve group 2 (range mark B valve); 12-third valve block 3 (sample B valve); 13-a syringe pump; 14-three-way valve; 15-liquid storage ring; 16-a first valve block valve body 1; 17-first valve group valve body 2 (standard liquid A valve); 18-first valve block 3 (standard liquid B valve); 19-first valve group valve body 4 (adding mark valve); 20-a first valve block valve body 5; 21-a first liquid standard adding bottle; 22-a second liquid standard adding bottle; 23-quantitative port.
Detailed Description
In order to make the features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail as follows:
as shown in fig. 1, the dynamic labeled water quality online quality control instrument provided by this embodiment has the following core characteristics: the marking assembly is composed of a syringe pump 13, a three-way valve 14, a liquid storage ring 15 and a first valve group (17-20). Wherein, three ports of the three-way valve 14 are respectively connected with the injection pump 13, the liquid storage ring 15 and the water injection port; the other end of the liquid storage ring is connected with a first valve bank (17-20); the first valve set (17-20) is used to connect the standard liquid bottle (the embodiment includes a first standard liquid bottle 21 and a second standard liquid bottle 22, which can be increased or decreased according to specific needs), the air inlet, the waste liquid outlet and the sampling cup.
As another important improvement, the sampling cup 1 is provided with a hole at a fixed position on the side wall as a quantitative port 23 and is connected with a quantitative pump 3 for quantifying a water sample, and the volume of the sampling cup 1 below the quantitative port 23 is a fixed value; the bottom adopts a V-shaped structure, and the quantitative opening 23 adopts a necking structure. The necking structure is two opposite trapezoidal structures, or two opposite V-shaped structures can be understood. The bottom cover of the sampling cup is fixed by adopting the hold hoop to compress.
Further, the bottom of the sampling cup 1 is connected with an air pump 5 through a one-way valve 6. The bottom of the sampling cup 1 is also connected with an exhaust valve 4. The upper part of the sampling cup 1 is connected with a sampling pump 2 and is provided with an overflow drain outlet. The bottom of the sampling cup is respectively connected with two water quality analyzers through a second valve bank (7-9) and a third valve bank (10-12).
The following explains the specific operation principle of the present embodiment:
each water quality online quality control instrument can be matched with two water quality analyzers, and a high-precision injection pump 13 can be adopted to realize the transmission and metering of standard liquid, wherein the full range of the injection pump is 5ml, the liquid quantity accuracy is less than 1%, and the precision is very high; the device is provided with a first standard adding liquid bottle 21 and a second standard adding liquid bottle 22 for containing high-concentration standard liquid, when the standard is added and recovered, the injection pump 13 absorbs X milliliters of one high-concentration standard liquid into the liquid storage ring 15, then the X milliliters of the high-concentration standard liquid is injected into the sampling cup 1 through the standard adding valve 19 to be mixed with a water sample, the device of the embodiment is combined with an electronic control system of a conventional water quality online quality control instrument, the quantity X of the high-concentration standard liquid can be set on a touch screen interface, and thus the standard adding quantity can be dynamically set according to the concentration of the water sample on site.
In the embodiment, the liquid paths are switched by adopting the second valve group 7-9, the third valve group 10-12 and the first valve group 16-20 of the group discharge valve, a small amount of air can be absorbed to isolate different liquids in the process of switching the liquid paths, and the cross contamination of different liquids is avoided; before using, the online quality control appearance of quality of water will switch over three-way valve 14 and first valves 16~20 and absorb the pure water and be used for filling stock solution ring 15, and stock solution ring 15 can adopt high-quality hard tube, and the inner wall is bright and clean, and liquid does not have the hanging when passing through to remain, and at the in-process that the standard liquid switches the transmission, the pure water and the standard liquid of filling usefulness can not produce mutual pollution because of the hanging.
In the embodiment, the combination of the small air pump 5 and the one-way valve 6 is adopted, the sample cup 1 is blown after the added standard is recovered, the added standard liquid and a water sample are uniformly mixed by using bubbles for stirring, the air output of the small air pump 1 is suitable, and similarly, the blowing time can be set on the touch screen after the control system is combined.
In the embodiment, a hole is formed in a fixed position on the side wall of the sampling cup 1 to quantify a water sample, and the volume of the sampling cup below a quantifying port 23 is a fixed value; the sampling cup bottom cover is tightly pressed by the hoop, the bottom of the sampling cup bottom cover is designed in a V shape, the cross-sectional area of the water surface at the quantitative opening 23 is reduced, and the quantitative error caused by installation inclination can be reduced.
The working flow of the online quality control instrument for water quality in the embodiment in the system is as follows:
1) when water sample measurement needs to be carried out, the quality control instrument receives a corresponding instruction: firstly, opening an emptying valve 4 of a quality control instrument, emptying a water sample in a sampling cup last time, then starting a sample injection pump 2 of the quality control instrument to extract the water sample to be measured from a flow cell to the sampling cup 1, rinsing the water sample with the water sample for a period of time, then closing the emptying valve 4 of the quality control instrument, storing the water sample in the sampling cup 1, stopping the sample injection pump 2 when the water level of the sampling cup is close to an overflow port, simultaneously opening a sample supply A valve 9 and a sample supply B valve 11, and finally respectively extracting the water sample by a water quality analyzer A and a water quality analyzer B for measurement.
2) When the zero drift of the water quality analyzer is required to be checked to be beyond a standard range: the quality control instrument opens the zero-mark A valve 7 and the zero-mark B valve 10, and the water quality analyzer A and the water quality analyzer B respectively extract the zero marks for measurement; and after 24 hours, the quality control instrument opens the zero-standard A valve 7 and the zero-standard B valve 10, the water quality analyzer A and the water quality analyzer B respectively extract the zero standard for measurement, two groups of measurement results are introduced into a zero drift formula for 24 hours for calculation, and when the standard range is exceeded, the water sample measurement data in the 24 hours are judged to be invalid, and the water quality analyzer needs to be recalibrated.
3) When the span drift of the water quality analyzer is required to be checked whether the span drift exceeds a standard range: the quality control instrument opens the range mark A valve 8 and the range mark B valve 11, and the water quality analyzer A and the water quality analyzer B respectively extract the checking standard liquid A and the checking standard liquid B for measurement; and after 24 hours, the quality control instrument opens the range mark A valve 8 and the range mark B valve 11, the water quality analyzer A and the water quality analyzer B respectively extract the checking mark liquid A and the checking mark liquid B for measurement, two groups of measurement results are introduced into a 24-hour span drift formula for calculation, and when the standard range is exceeded, the water sample measurement data in the 24 hours are judged to be invalid, and the water quality analyzer needs to be calibrated again.
4) When need to examine whether the deviation of water quality analysis appearance water sample measured value is too big, need add the mark and retrieve the test: firstly, the quality control instrument carries out water sample measurement for one time according to the steps in 1), then, the quantitative pump 3 is started, redundant water samples in the sampling cup 1 are pumped out, the water level reaches the position of a quantitative opening, the volume of the water samples in the sampling cup 1 is 312 milliliters, then, the standard liquid A valve 17 is opened, the injection pump 13 sucks X milliliters of standard liquid A (the value of X can be dynamically adjusted on a touch screen) and stores the standard liquid A in the liquid storage ring 15, then, the standard liquid A valve 17 is closed, the standard valve 19 is opened, the injection pump 13 injects the standard liquid A in the liquid storage ring 15 into the sampling cup 1 through the standard valve 19, (when one quality control instrument is connected with two water quality analyzers, the same process is needed to inject the standard liquid B into the sampling cup through the standard liquid B valve 18), then, the air blowing pump 5 blows air into the sampling cup 1 through the one-way valve 6, the sampled water samples and the standard liquid in the sampling cup are uniformly stirred by the air, finally, the sample A valve 9 and the sample B valve 12 are opened, and the mixed sample with the standard is supplied to the water quality analyzer A and the water quality analyzer B respectively for measurement. And (3) bringing the water sample measured value measured by the water quality analyzer for the first time and the standard adding mixed sample value measured for the second time into a standard adding recovery rate calculation formula, and judging that the water sample measured value is too large in deviation due to external conditions or self reasons and the water sample test data is invalid when the standard adding recovery rate exceeds 80% -120%.
In summary, the online water quality control instrument can remotely and automatically provide a zero standard, a range standard, a water sample and a standard-adding mixed sample for the measurement of the water quality analyzer, and can dynamically adjust the quantity of the standard-adding quantity within a certain range according to the concentration of the water sample on site.
The present invention is not limited to the above preferred embodiments, and any person can obtain other various dynamic labeled water quality on-line quality control instruments according to the teaching of the present invention.
Claims (8)
1. The utility model provides a developments add online matter of water quality accuse appearance of mark which characterized in that: the marking assembly consists of an injection pump, a three-way valve, a liquid storage ring and a first valve group; three ports of the three-way valve are respectively connected with the injection pump, the liquid storage ring and the water injection port; the other end of the liquid storage ring is connected with a first valve bank; the first valve group is respectively used for connecting the standard liquid adding bottle, the air inlet, the waste liquid outlet and the sampling cup.
2. The dynamic labeled water quality online quality control instrument according to claim 1, characterized in that: the sampling cup is provided with a hole at a fixed position on the side wall and is connected with a quantitative pump for quantifying a water sample, and the volume of the sampling cup below a quantitative port is a fixed value; the bottom adopts a V-shaped structure, and the quantitative opening adopts a necking structure.
3. The dynamic labeled water quality online quality control instrument according to claim 2, characterized in that: the necking structures are two trapezoid structures which are arranged oppositely.
4. The dynamic labeled water quality online quality control instrument according to claim 2, characterized in that: the bottom cover of the sampling cup is fixed by adopting the hold hoop to compress.
5. The dynamic labeled water quality online quality control instrument according to claim 1, characterized in that: the bottom of the sampling cup is connected with an air pump through a one-way valve.
6. The dynamic labeled water quality online quality control instrument according to claim 1, characterized in that: the bottom of the sampling cup is connected with an exhaust valve.
7. The dynamic labeled water quality online quality control instrument according to claim 1, characterized in that: the upper part of the sampling cup is connected with a sampling pump and is provided with an overflow drain outlet.
8. The dynamic labeled water quality online quality control instrument according to claim 1, characterized in that: the bottom of the sampling cup is connected with two water quality analyzers through a second valve bank and a third valve bank respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121704633.2U CN215641193U (en) | 2021-07-26 | 2021-07-26 | Dynamic adding mark water quality on-line quality control instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121704633.2U CN215641193U (en) | 2021-07-26 | 2021-07-26 | Dynamic adding mark water quality on-line quality control instrument |
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| Publication Number | Publication Date |
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| CN215641193U true CN215641193U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121704633.2U Active CN215641193U (en) | 2021-07-26 | 2021-07-26 | Dynamic adding mark water quality on-line quality control instrument |
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| CN (1) | CN215641193U (en) |
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2021
- 2021-07-26 CN CN202121704633.2U patent/CN215641193U/en active Active
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