CN103868782B - The dilution system of fishery water quality automatic on-line monitoring system and dilution process - Google Patents

The dilution system of fishery water quality automatic on-line monitoring system and dilution process Download PDF

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Publication number
CN103868782B
CN103868782B CN201410083893.0A CN201410083893A CN103868782B CN 103868782 B CN103868782 B CN 103868782B CN 201410083893 A CN201410083893 A CN 201410083893A CN 103868782 B CN103868782 B CN 103868782B
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Prior art keywords
electromagnetic valve
dilution
peristaltic pump
water quality
drum
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CN201410083893.0A
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CN103868782A (en
Inventor
杨弘
祝璟琳
肖炜
邹芝英
李大宇
韩珏
乐贻荣
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Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences
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Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences
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Abstract

The present invention provides the dilution system of a kind of fishery water quality automatic on-line monitoring system, including dilution system main control PLC, first peristaltic pump and the second peristaltic pump, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, two-bit triplet the 4th electromagnetic valve, 5th electromagnetic valve, sample filtering bucket, from the beginning bucket, dilution drum, blender.First electromagnetic valve, from the beginning bucket, the second electromagnetic valve, the second peristaltic pump and dilution drum are attached with water pipe in order.Sample filtering bucket, the first peristaltic pump, the 3rd electromagnetic valve and dilution drum are attached with water pipe in order.Two-bit triplet the 4th electromagnetic valve is connected with multiparameter water quality analyzer after sample filtering bucket connects with dilution drum water pipe.The work head of blender stretches in dilution drum, and the 5th electromagnetic valve is connected with bottom dilution drum.Present invention achieves the water quality sample to exceeding fishery water quality automatic on-line monitoring system range ability and carry out on-line dilution and measurement.

Description

The dilution system of fishery water quality automatic on-line monitoring system and dilution process
Technical field
The present invention relates to fishery cultivating facility, the dilution system of a kind of water quality monitoring system.
Background technology
Breeding fish and i.e. " support water ", regulating and controlling water quality is most important for aquaculture.Regulating and controlling water quality to be carried out, first has to understand the water quality parameter of breeding water body.The methods such as the generally monitoring of water quality parameter needs collection in worksite water sample, send use for laboratory chemico-analytic method, spectrophotography measure one by one, and the data accuracy of so monitoring is high, but its project is single, wastes time and energy, and can not whip up.Electric pole type water quality tacheometer can also be used to be inserted directly into water sample detect, convenient timely.But more existing electric pole type water quality tacheometers can only detect single index mostly, and can not real time on-line monitoring.Along with the progress of science and technology, large quantities of patents of invention relating to the detection of water quality automatic on-line or utility model emerge, e.g., and 201210229278.7: a kind of cultivation water monitoring water sample sampling device;ZL 01268242.X: a kind of online water quality testing meter;03131969.6: a kind of multi-parameter water quality monitoring method and device, etc., it is possible to achieve to fishery water quality multiparameter on-line real time monitoring.But, once the parameter of fishery water quality exceedes the range of water quality automatic on-line monitoring system, then its measurement result maybe cannot be measured with regard to unreliable.Such as the water quality index in pond, living through winter for tilapia greenhouse, because cultivation density is big, water body is little, and it is low to change water frequency, and ammonia nitrogen therein, the concentration of the index such as nitrate nitrogen and nitrite nitrogen is significantly larger than the concentration in Aquacultural water, even beyond the range of on-line monitoring system.If building a set of on-line monitoring system again, the most time-consuming, costly, laborious.
Summary of the invention
For the deficiencies in the prior art, the present invention provides the dilution system of a kind of fishery water quality automatic on-line monitoring system, realize the water quality sample exceeding fishery water quality automatic on-line monitoring system range ability is carried out on-line dilution and measurement, make measurement result more accurate.Present invention also offers the method utilizing above-mentioned dilution system to carry out diluted sample.The technical solution used in the present invention is:
The dilution system of a kind of fishery water quality automatic on-line monitoring system, including dilution system main control PLC, the first peristaltic pump and the second peristaltic pump, the first electromagnetic valve, the second electromagnetic valve, 3rd electromagnetic valve, two-bit triplet the 4th electromagnetic valve, the 5th electromagnetic valve, sample filtering bucket, bucket from the beginning, dilution drum, blender;Dilution system main control PLC is online with main system PLC of fishery water quality automatic on-line monitoring system, the order output terminal of dilution system main control PLC electrically connects the first peristaltic pump, the second peristaltic pump, blender, the first electromagnetic valve, second electromagnetic valve, 3rd electromagnetic valve, two-bit triplet the 4th electromagnetic valve, the 5th electromagnetic valve.
First electromagnetic valve, from the beginning bucket, the second electromagnetic valve, the second peristaltic pump and dilution drum are attached with water pipe in order.
Sample filtering bucket, the first peristaltic pump, the 3rd electromagnetic valve and dilution drum are attached with water pipe in order.
Two-bit triplet the 4th electromagnetic valve is connected with multiparameter water quality analyzer after sample filtering bucket connects with dilution drum water pipe.
The work head of blender stretches in dilution drum, and the 5th electromagnetic valve is connected with bottom dilution drum.
Further, the top of described bucket from the beginning is provided with a tap water overflow pipe.
It is an advantage of the current invention that: when fishery water quality testing concentration is up to or over the measurement upper limit set, can be according to the requirement automatic dilution of extension rate, it is ensured that the concentration after dilution is in the range ability of automatic on-line monitoring system.This dilution system simple in construction, easy to operate, analysis result is accurate, and reliability is high, it is to avoid cause the inaccurate of measurement result because of water sample concentration no to scale to be measured.
Accompanying drawing explanation
Fig. 1 is the electrical connection schematic diagram of the present invention.
Fig. 2 is the structure composition schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 1 and Figure 2, the dilution system of a kind of fishery water quality automatic on-line monitoring system, including dilution system main control PLC (programmable logic controller (PLC)), the first peristaltic pump and the second peristaltic pump, the first electromagnetic valve, second electromagnetic valve, 3rd electromagnetic valve, two-bit triplet the 4th electromagnetic valve, the 5th electromagnetic valve, sample filtering bucket, bucket from the beginning, dilution drum, blender and tap water overflow pipe etc..Dilution system main control PLC can use the PLC that Siemens Company produces.
Fishery water quality automatic on-line monitoring system is typically used for monitoring the water quality of outdoor pond fishery water body, mainly includes main system PLC and multiparameter water quality analyzer etc..When winter at fingerlings such as tank interior cultivating tilapias time, owing to tank interior cultivation density is big, ammonia nitrogen therein, the concentration of the index such as nitrate nitrogen and nitrite nitrogen is significantly larger than the concentration in Aquacultural water, even can exceed the range of multiparameter water quality analyzer.When the water quality that index concentration is high being monitored hence with existing fishery water quality automatic on-line monitoring system, then need suitable sample water is diluted.
The dilution system that the present invention provides, is attached as shown in Figure 1 and Figure 2.
Dilution system main control PLC is online with main system PLC of fishery water quality automatic on-line monitoring system, the order output terminal of dilution system main control PLC electrically connects the first peristaltic pump, the second peristaltic pump, blender, the first electromagnetic valve, second electromagnetic valve, 3rd electromagnetic valve, two-bit triplet the 4th electromagnetic valve, 5th electromagnetic valve, works by controlling the pump valve of dilution system, makes system have water sample dilution function.
First electromagnetic valve, from the beginning bucket, the second electromagnetic valve, the second peristaltic pump and dilution drum are attached with water pipe in order.For preventing the water in bucket from the beginning from overflowing, the top of bucket is provided with a tap water overflow pipe from the beginning.
Sample filtering bucket, the first peristaltic pump, the 3rd electromagnetic valve and dilution drum are attached with water pipe in order.
Two-bit triplet the 4th electromagnetic valve is connected with multiparameter water quality analyzer after sample filtering bucket connects with dilution drum water pipe.
The work head of blender stretches in dilution drum, and the 5th electromagnetic valve is connected with bottom dilution drum.
The dilution system of above-mentioned fishery water quality automatic on-line monitoring system, utilizes the second electromagnetic valve to control the working time of the second peristaltic pump, utilizes the 3rd electromagnetic valve to control the working time of the first peristaltic pump, utilizes the 5th electromagnetic valve to the water emptying in dilution drum.
The dilution system of above-mentioned fishery water quality automatic on-line monitoring system, the working time utilizing the 3rd electromagnetic valve and the first peristaltic pump (sampling pump) controls sample feeding amount, the working time utilizing the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump (water service pump) controls the input of tap water, is sufficiently stirred for mixing with mixer after extension rate sample introduction product as requested and tap water in dilution drum.
The dilution system of above-mentioned fishery water quality automatic on-line monitoring system, utilizes two-bit triplet the 4th electromagnetic valve to control from dilution drum or directly from sample filtering bucket, sample drawing enters multiparameter water quality analyzer and is analyzed.
Utilizing the dilution system of above-mentioned fishery water quality automatic on-line monitoring system, can carry out the dilution of water sample to be measured, concrete grammar is as described below:
Control command is sent by dilution system main control PLC,
First, open the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump, close the 5th electromagnetic valve, dilution drum enters tap water, with blender, dilution drum is carried out;
Then, by opening in the 5th electromagnetic valve emptying dilution drum for the water cleaned, the 5th electromagnetic valve is closed;
Then, open the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump, close the 5th electromagnetic valve, dilution drum enters tap water, after continuing a first time period, close the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump;
Subsequently, open the first peristaltic pump and the 3rd electromagnetic valve, dilution drum enters sample to be diluted, after continuing second time period, close the first peristaltic pump and the 3rd electromagnetic valve;
Finally, stirring with blender, open the 4th electromagnetic valve after mix homogeneously, after taking out the dilution in dilution drum, sample is to multiparameter water quality analyzer;
In said process, the flow of the multiple, the flow of the first peristaltic pump and the second peristaltic pump that dilute as required correspondingly sets the first time period into tap water and the second time period entering sample to be diluted.
By simple conversion, it can be deduced that relational expression is as follows:
Specific embodiment one: when in water body, ammonia nitrogen concentration is 2mg/L, and the range of fishery water quality automatic on-line monitoring system is 0-2mg/L, dilution target is 2 times, and the concentration after dilution is 1mg/L.The flow of the first peristaltic pump is 0.5L/min, and the flow of the second peristaltic pump is 1L/min.
First, open the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump, close the 5th electromagnetic valve, continue 30s, with blender stirring 15s, dilution drum is carried out;
Then, open the 5th electromagnetic valve 30s, after the water in emptying dilution drum, close the 5th electromagnetic valve;
Then, open the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump, close the 5th electromagnetic valve, after continuing 10s, close the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump;This period dilution drum enters tap water;
Subsequently, open the first peristaltic pump and the 3rd electromagnetic valve, after continuing 20s, close the first peristaltic pump and the 3rd electromagnetic valve;This period dilution drum enters sample to be diluted;
Finally, stirring 15s with mixer, open the 4th electromagnetic valve after mix homogeneously, after taking out the dilution in dilution drum, sample measures to multiparameter water quality analyzer.
Specific embodiment two: when in water body, nitrite nitrogen concentration is 1.5mg/L, and fishery water quality automatic on-line monitoring system range is 0-0.3mg/L, dilution target is 10 times, and the concentration after dilution is 0.15mg/L.The flow of the first peristaltic pump is 0.5L/min, and the flow of the second peristaltic pump is 1L/min.
First, open the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump, close the 5th electromagnetic valve, continue 30s, with blender stirring 15s, dilution drum is carried out;
Then, open the 5th electromagnetic valve 30s, after the water in emptying dilution drum, close the 5th electromagnetic valve;
Then, open the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump, close the 5th electromagnetic valve, after continuing 45s, close the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump;This period dilution drum enters tap water;
Subsequently, open the first peristaltic pump and the 3rd electromagnetic valve, after continuing 10s, close the first peristaltic pump and the 3rd electromagnetic valve;This period dilution drum enters sample to be diluted;
Finally, stirring 15s with mixer, open the 4th electromagnetic valve after mix homogeneously, after taking out the dilution in dilution drum, sample measures to multiparameter water quality analyzer.
For the extension rate of some conventional water quality parameters, following dilution system simulation computational chart can be summarized as according to calculating and actually used situation.

Claims (2)

1. the water sample dilution process of a fishery water quality automatic on-line monitoring system, it is characterised in that: utilize the dilution system of fishery water quality automatic on-line monitoring system, and use following step:
Control command is sent by dilution system main control PLC;
First, open the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump, close the 5th electromagnetic valve, dilution drum enters tap water, with blender, dilution drum is carried out;
Then, by opening in the 5th electromagnetic valve emptying dilution drum for the water cleaned, the 5th electromagnetic valve is closed;
Then, open the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump, close the 5th electromagnetic valve, dilution drum enters tap water, after continuing a first time period, close the first electromagnetic valve, the second electromagnetic valve and the second peristaltic pump;
Subsequently, open the first peristaltic pump and the 3rd electromagnetic valve, dilution drum enters sample to be diluted, after continuing second time period, close the first peristaltic pump and the 3rd electromagnetic valve;
Finally, stirring with blender, open the 4th electromagnetic valve after mix homogeneously, after taking out the dilution in dilution drum, sample is to multiparameter water quality analyzer;
In said process, the flow of the multiple, the flow of the first peristaltic pump and the second peristaltic pump that dilute as required correspondingly sets the first time period into tap water and the second time period entering sample to be diluted;
Physical relationship formula is as follows:
The dilution system of described fishery water quality automatic on-line monitoring system includes dilution system main control PLC, the first peristaltic pump and the second peristaltic pump, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, two-bit triplet the 4th electromagnetic valve, the 5th electromagnetic valve, sample filtering bucket, bucket from the beginning, dilution drum, blender;
Dilution system main control PLC is online with main system PLC of fishery water quality automatic on-line monitoring system, the order output terminal of dilution system main control PLC electrically connects the first peristaltic pump, the second peristaltic pump, blender, the first electromagnetic valve, second electromagnetic valve, 3rd electromagnetic valve, two-bit triplet the 4th electromagnetic valve, the 5th electromagnetic valve;
First electromagnetic valve, from the beginning bucket, the second electromagnetic valve, the second peristaltic pump and dilution drum are attached with water pipe in order;
Sample filtering bucket, the first peristaltic pump, the 3rd electromagnetic valve and dilution drum are attached with water pipe in order;
Two-bit triplet the 4th electromagnetic valve is connected with multiparameter water quality analyzer after sample filtering bucket connects with dilution drum water pipe;
The work head of blender stretches in dilution drum, and the 5th electromagnetic valve is connected with bottom dilution drum.
The water sample dilution process of a kind of fishery water quality automatic on-line monitoring system the most as claimed in claim 1,
It is characterized in that: the top of described bucket from the beginning is provided with a tap water overflow pipe.
CN201410083893.0A 2014-03-07 2014-03-07 The dilution system of fishery water quality automatic on-line monitoring system and dilution process Expired - Fee Related CN103868782B (en)

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* Cited by examiner, † Cited by third party
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CN104062167A (en) * 2014-06-23 2014-09-24 青岛普仁仪器有限公司 Automatic online sample dilution and mixing device and mixing method
CN107364550B (en) * 2017-06-26 2023-05-19 中国水产科学研究院淡水渔业研究中心 Online automatic detection ship for fishery water quality
CN107560923B (en) * 2017-08-24 2020-08-04 天津市华宇膜技术有限公司 Water sample dilution system and method for expanding online water quality detection range
CN108854837A (en) * 2018-07-18 2018-11-23 北京宝德仪器有限公司 On-line dilution device
CN109164224B (en) * 2018-09-29 2024-04-30 成都凯天电子股份有限公司 Water sample on-line dilution monitor
CN109855946A (en) * 2019-02-19 2019-06-07 苏州科技大学 A kind of high-concentration waste water on-line detector water inlet dilution device
CN110632267A (en) * 2019-08-02 2019-12-31 同济大学 System and method for continuously measuring high-concentration sewage exceeding application range of online instrument

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US5454912A (en) * 1992-09-25 1995-10-03 Dougherty; Steven J. Suspension quality monitoring apparatus
JP2011153848A (en) * 2010-01-26 2011-08-11 Sysmex Corp Reagent preparation device
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