阅读说明：本技术 一种集过滤、分析于一体的原位营养盐分析仪 (Collect filtration, analysis in normal position nutritive salt analysis appearance of an organic whole ) 是由 汪水吉 郭冰璇 陈静萍 崔建平 吴晓炜 郑丹烨 于 2020-07-08 设计创作，主要内容包括：本发明涉及原位营养盐分析仪技术领域,公开了一种集过滤、分析于一体的原位营养盐分析仪,包括分析单元、过滤单元和控制系统。分析单元通过第一管道与过滤单元连接,过滤单元包括过滤器和过滤驱动单元。过滤驱动单元密封设置于分析单元内部。过滤器外置于分析单元外部,过滤器、过滤驱动单元和分析单元通过所述第一管道相互连通,控制系统用于控制分析单元和过滤驱动单元的运行。本发明不仅能实现自动对水质进行原位营养盐实时检测分析,还缩小了过滤单元体积,进一步优化了分析仪的内部结构。可实现过滤单元的过滤器可直接扔于水下,长时间浸泡水,大大减少了分析仪故障率,确保分析仪可在野外户外无人原位监测下长期稳定的运行。(The invention relates to the technical field of in-situ nutrient salt analyzers, and discloses an in-situ nutrient salt analyzer integrating filtering and analyzing. The analysis unit is connected with a filtering unit through a first pipeline, and the filtering unit comprises a filter and a filtering driving unit. The filtering driving unit is hermetically arranged inside the analysis unit. The filter is arranged outside the analysis unit, the filter, the filtering driving unit and the analysis unit are communicated with each other through the first pipeline, and the control system is used for controlling the operation of the analysis unit and the filtering driving unit. The invention not only can realize the automatic in-situ real-time detection and analysis of nutritive salt for water quality, but also reduces the volume of the filter unit and further optimizes the internal structure of the analyzer. The filter capable of realizing the filtering unit can be directly thrown underwater and soaked in water for a long time, so that the failure rate of the analyzer is greatly reduced, and the analyzer can be ensured to operate stably for a long time under outdoor unmanned in-situ monitoring.)

1. An in-situ nutrient salt analyzer integrating filtering and analyzing comprises an analyzing unit, a filtering unit and a control system, wherein the analyzing unit is connected with the filtering unit through a first pipeline; the method is characterized in that: the filtering unit comprises a filter and a filtering driving unit; the filtering driving unit is hermetically arranged in the analysis unit; the filter is arranged outside the analysis unit, the filter, the filtering driving unit and the analysis unit are communicated with each other through the first pipeline, and the control system is used for controlling the operation of the analysis unit and the filtering driving unit.

2. The in-situ nutrient salt analyzer integrating filtration and analysis as claimed in claim 1, wherein: the filtering driving unit comprises a first three-way valve, a second three-way valve and a diaphragm pump; the water inlets of the first three-way valve and the second three-way valve are respectively communicated with the water outlet and the water inlet of the diaphragm pump; the normally open water inlets of the first three-way valve and the second three-way valve are respectively communicated with the water outlet; and the normally closed water inlets of the first three-way valve and the second three-way valve are respectively communicated with the first pipeline.

3. The in-situ nutrient salt analyzer integrating filtration and analysis as claimed in claim 1, wherein: the filter comprises a filter shell, a primary filtering part, a middle-stage filtering part and a precise filtering part; an upper cavity and a lower cavity are arranged in the filtering shell, and a connecting channel is arranged between the two cavities; the outer wall of the lower cavity is provided with a plurality of filtering holes; the primary filtering part is a filtering hole arranged on the shell; the middle-stage filtering part is arranged in the lower cavity, and the precise filtering part is arranged in the upper cavity.

4. The in-situ nutrient salt analyzer integrating filtration and analysis as claimed in claim 3, wherein: the middle-stage filtering part is a filtering sand core; the precise filtering part is a filtering membrane with the pore diameter not more than 0.45 nm; the filtering sand core is arranged in the lower cavity and clings to the lower end of the channel; the filtering membrane is arranged in the upper cavity, the lower end of the filtering membrane is tightly attached to the upper end of the channel, and the upper end of the filtering membrane is tightly attached to the water outlet of the filter; the water outlet of the filter is communicated with the first pipeline.

5. The in-situ nutrient salt analyzer integrating filtration and analysis as claimed in claim 1, wherein: the analysis unit comprises a main body shell, an analysis module and a peristaltic pump, wherein the analysis module and the peristaltic pump are arranged in the main body shell; the water inlet of the peristaltic pump is communicated with the analysis module, and the water outlet of the peristaltic pump is communicated with the first pipeline.

Technical Field

The invention relates to the technical field of in-situ nutrient salt analyzers, in particular to an in-situ nutrient salt analyzer integrating filtration and analysis, which is mainly applied to monitoring of water environments and pollution zones of oceans, rivers, lakes and the like.

Background

Nutritive salt of water quality such as surface water, rivers, oceans and the like has very important influence on the growth and propagation of phytoplankton in the ocean, is one of important parameters for monitoring the water quality, and has very important significance in monitoring the concentration of the nutritive salt.

The traditional method for measuring the concentration of the nutrient salt mainly utilizes a water sampler to collect a water sample, and the water sample is stored by a certain means and then is taken back to a land laboratory for analysis. Although the analysis method is simple and easy to implement, water sample pollution is caused in the transportation process, so that the accuracy of data determination is influenced; meanwhile, manual measurement consumes a large amount of labor and time, and the problems of operation errors and the like are easily caused. Therefore, the current nutrient analysis technology begins to develop towards the trend of automation and on-site analysis.

However, most of the existing nutrient salt analysis instruments have large volume, complex structure, high cost and high failure rate. With the development of the times and the requirements of water quality environment monitoring work, the development of a small-sized on-site automatic analysis instrument with simple structure and strong universality has become a great trend for the development of water quality nutrient salt analysis instruments.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an in-situ nutrient salt analyzer integrating filtration and analysis, wherein a control system, a filtration unit and an analysis unit are integrated into a whole, and a filtration driving unit of the filtration unit is hermetically arranged in the analysis unit, so that the in-situ nutrient salt analyzer can automatically detect and analyze water quality in real time, reduce the volume of the filtration unit and further optimize the internal structure of the analyzer. The filter capable of realizing the filtering unit can be directly thrown underwater and soaked in water for a long time, so that the failure rate of the analyzer is greatly reduced, and the analyzer can be ensured to operate stably for a long time under outdoor unmanned in-situ monitoring.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention discloses an in-situ nutrient salt analyzer integrating filtering and analyzing, which comprises an analyzing unit, a filtering unit and a control system, wherein the analyzing unit is connected with the filtering unit through a first pipeline. The filter unit includes a filter and a filter driving unit. The filtering driving unit is arranged inside the analysis unit in a sealing mode, and the filter is arranged outside the analysis unit. The filter, the filter driving unit and the analysis unit are communicated with each other through the first pipeline. The design not only reduces the volume of the filter unit, but also further optimizes the internal structure of the analyzer. The control system is used for controlling the operation of the analysis unit and the filtering driving unit.

Further, the filter driving unit includes a first three-way valve, a second three-way valve, and a diaphragm pump; the water inlet a of the first three-way valve and the water inlet A of the second three-way valve are respectively communicated with the water outlet and the water inlet of the diaphragm pump; the normally open water outlet B of the first three-way valve and the normally open water outlet B of the second three-way valve are respectively communicated with a water outlet; and the normally closed water inlet C of the first three-way valve and the normally closed water inlet C of the second three-way valve are respectively communicated with the first pipeline. Under the condition of not opening, a water inlet a of the first three-way valve is communicated with a normally open water outlet b, and the water inlet a is not communicated with a normally closed water outlet c; and a water inlet A of the second three-way valve is communicated with a normally open water outlet B, and the water inlet A is not communicated with a normally closed water outlet C. In the open case, the opposite is true.

When the analyzer is started, the second three-way valve and the diaphragm pump are opened firstly, and the sample is filtered by the filter and then is discharged from the drain pipe sequentially through the second three-way valve, the diaphragm pump and the first three-way valve. And after the filtration is finished, the analysis unit extracts the filtered sample in the pipeline and analyzes the detection factor. And after the analysis unit finishes sampling, opening the first three-way valve and the diaphragm pump. And (4) extracting air in the drain pipe, and emptying residual filter samples to ensure that the filter is filled with air to prevent substances in water from growing and attaching in the filter.

Further, the filter comprises a filter housing, a primary filter portion, a middle filter portion and a fine filter portion; an upper cavity and a lower cavity are arranged in the filtering shell, and a connecting channel is arranged between the two cavities; the outer wall of the lower cavity is provided with a plurality of filtering holes; the primary filtering part is a filtering hole arranged on the shell; the middle-stage filtering part is arranged in the lower cavity, and the precise filtering part is arranged in the upper cavity. The initial filtration of the shell can prevent stones, plastic belts, leaves, aquatic organisms and other substances from entering the filter. The middle-stage filtration is fine filtration, so that the substances such as silt, large particles and the like in water can be prevented from entering; and the fine filtration can avoid small particle substances from entering an analysis pipeline.

Wherein the middle-stage filtering part is a filtering sand core; the precise filtering part is a filtering membrane with the pore diameter not more than 0.45 nm; the filtering sand core is arranged in the lower cavity and clings to the lower end of the channel; the filtering membrane is arranged in the upper cavity, the lower end of the filtering membrane is tightly attached to the upper end of the channel, and the upper end of the filtering membrane is tightly attached to the water outlet of the filter; the water outlet of the filter is communicated with the first pipeline.

Further, the analysis unit comprises a main body shell, and an analysis module and a peristaltic pump which are arranged in the main body shell; the water inlet of the peristaltic pump is communicated with the analysis module, and the water outlet of the peristaltic pump is communicated with the first pipeline. The analysis unit pumps the water sample of the filter through the diaphragm pump, and after filtration is completed, sampling analysis is performed through the peristaltic pump.

The invention has the advantages that:

1. the invention seals the filtering power unit of the filtering unit in the analysis unit, and the filter is arranged outside the analysis unit. Not only reduces the volume of the filter unit, but also further optimizes the internal structure of the analyzer. The filter capable of realizing the filtering unit can be directly thrown underwater and soaked in water for a long time, so that the failure rate of the analyzer is greatly reduced, and the analyzer can be ensured to operate stably for a long time under outdoor unmanned in-situ monitoring. Meanwhile, the volume of the filtering part is greatly reduced, and the carrying and the use are convenient. The filter is arranged outside the analyzer, and is convenient to disassemble, clean and maintain.

2. The invention integrates two units of filtering and analyzing, the filter uses three stages of filtering layer by layer and then enters the analyzing module for detecting, thus realizing long-term, stable and in-situ real-time analysis of different watersheds and having great significance for monitoring different water qualities.

3. The filter driving unit is provided with the first three-way valve, the second three-way valve and the diaphragm pump, the detection of the nutrient salt analyzer is monitored by controlling the switches of the first three-way valve and the second three-way valve, air in the drain pipe can be extracted, residual filter samples are emptied, and the filter is filled with air to prevent substances in water from growing and adhering to the filter. Meanwhile, the power consumption of the filtering driving unit is less than 2W, the simple structure reduces faults and maintenance points, and the system is suitable for a long-time field unmanned detection system.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the connection of the present invention.

Description of the main component symbols:

1-an analysis unit, 11-an analysis module, 12-a peristaltic pump, 2-a filtration unit, 21-a filter, 211-a filtration housing, 212-a filtration pore, 213-a channel, 214-a filtration sand core, 215-a filtration membrane, 22-a filtration drive unit, 221-a first three-way valve, 222-a second three-way valve, 223-a membrane pump, 3-a first pipeline.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, the invention discloses an in-situ nutrient salt analyzer integrating filtration and analysis, which comprises an analysis unit 1, a filtration unit 2 and a control system. The analysis unit 1 is connected to the filter unit 2 via a first conduit 3. The filter unit 2 includes a filter 21 and a filter driving unit 22. The filter drive unit 22 is hermetically disposed inside the analysis unit 1, and the filter 21 is externally disposed outside the analysis unit 1. The filter 21, the filter driving unit 22 and the analyzing unit 1 are communicated with each other through the first duct 3. The design not only reduces the volume of the filter unit 2, but also further optimizes the internal structure of the analyzer. The control system is used to control the operation of the analysis unit 1 and the filter drive unit 22.

The filter driving unit 22 includes a first three-way valve 221, a second three-way valve 222, and a diaphragm pump 223; a water inlet a of the first three-way valve 221 and a water inlet a of the second three-way valve 222 are respectively communicated with a water outlet and a water inlet of the diaphragm pump 223; a normally open water outlet B of the first three-way valve 221 and a normally open water outlet B of the second three-way valve 222 are respectively communicated with the water outlet; the normally closed water inlet C of the first three-way valve 221 and the normally closed water inlet C of the second three-way valve 222 are respectively communicated with the first pipe 3. Under the condition of not opening, the water inlet a of the first three-way valve 221 is communicated with the normally open water outlet b, and the water inlet a is not communicated with the normally closed water outlet c; the water inlet a of the second three-way valve 222 is communicated with the normally open water outlet B, and the water inlet a is not communicated with the normally closed water outlet C. In the open case, the opposite is true.

The filter 21 includes a filter housing 211, a primary filtering portion, a middle-stage filtering portion, and a fine filtering portion; an upper cavity and a lower cavity are arranged in the filtering shell 211, and a connecting channel 213 is arranged between the two cavities; the outer wall of the lower cavity is provided with a plurality of filter holes 212; the primary filtering part is a filtering hole 212 arranged on the shell, and the primary filtering of the shell can prevent stones, plastic belts, leaves, aquatic organisms and other substances from entering the filter 21. The middle-stage filtering part is a filtering sand core 214, the filtering sand core 214 is arranged in the lower cavity and is tightly attached to the lower end of the channel 213, and the middle-stage filtering part is fine filtering, so that sediment, large particles and other substances in water can be prevented from entering. The precise filtering part is a filtering membrane 215 with the aperture not larger than 0.45nm, the filtering membrane 215 is arranged in the upper cavity, the lower end of the filtering membrane 215 is tightly attached to the upper end of the channel 213, the upper end of the filtering membrane 215 is tightly attached to the water outlet of the filter 21, and the precise filtering can prevent small particulate matters from entering the analysis pipeline. The outlet of the filter 21 is communicated with the first pipeline 3.

The analysis unit 1 comprises a main body shell, an analysis module 11 and a peristaltic pump 12, wherein the analysis module and the peristaltic pump are arranged in the main body shell; the water inlet of the peristaltic pump 12 is communicated with the analysis module 11, and the water outlet is communicated with the first pipeline 3. The analyzing unit 1 draws the water sample of the filter 21 through the diaphragm pump 223, and performs sampling analysis through the peristaltic pump 12 after the filtering of the analyzer is completed.

The use principle is as follows:

when the analyzer is started, the control system opens the second three-way valve 222 and the diaphragm pump 223 first, the diaphragm pump 223 starts to operate, the water inlet A is communicated with the normally closed water outlet C, and the water inlet a is communicated with the normally open water outlet b. The sample is filtered sequentially by the primary filtering portion, the intermediate filtering portion and the microfiltration portion of the filter 21, and finally discharged from the drain pipe sequentially by the second three-way valve 222, the diaphragm pump 223 and the first three-way valve 221. After the filtration is completed, the analysis unit 1 extracts the filtered sample in the pipeline and analyzes the detection factor. After the sampling of the analysis unit 1 is completed, the first three-way valve 221 is opened, and the second three-way valve 222 is closed. The water inlet A is communicated with the normally open water outlet B, the water inlet a is communicated with the normally closed water outlet c, air in the drain pipe is extracted, residual filter samples are emptied, the filter 21 is filled with air, and substances in water are prevented from growing and adhering in the filter 21.

In conclusion, the control system, the filtering unit and the analysis unit are integrated, and the filtering driving unit of the filtering unit is hermetically arranged in the analysis unit, so that the real-time detection and analysis of in-situ nutrient salt of water quality can be automatically realized, the size of the filtering unit is reduced, and the internal structure of the analyzer is further optimized. The filter capable of realizing the filtering unit can be directly thrown underwater and soaked in water for a long time, so that the failure rate of the analyzer is greatly reduced, and the analyzer can be ensured to operate stably for a long time under outdoor unmanned in-situ monitoring.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.