CN211785095U

CN211785095U - Flow path system of full-automatic water anionic surfactant tester

Info

Publication number: CN211785095U
Application number: CN201922266250.0U
Authority: CN
Inventors: 于盈达; 陆园; 吴洁玲; 王琪; 王梅芳
Original assignee: Ningbo Rannuo Scientific Instrument Co ltd
Current assignee: Ningbo Rannuo Scientific Instrument Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-10-27
Anticipated expiration: 2029-12-17

Abstract

The utility model relates to a flow path system of a full-automatic water anionic surfactant tester, which consists of a water sample treatment system, a washing and constant volume system, an impurity and moisture membrane filtration and separation system and a waste liquid collection and separation system; the water sample treatment system comprises a water sample cup, a pure water cup communicated with the water sample cup through a pipeline, a No. 1 three-way valve sequentially communicated with the water sample cup through an upper opening of a No. 2 three-way valve, a methylene blue reagent cup and an injection pump communicated with the water sample cup through a pipeline; the flow path system has the advantages of cross contamination prevention, fast operation, compact structure and the like.

Description

Flow path system of full-automatic water anionic surfactant tester

Technical Field

The utility model relates to an aquatic anion surfactant survey device field specifically is a flow path system of full-automatic aquatic anion surfactant apparatus.

Background

At present, few and few devices are developed on the market for fully automatically measuring the anionic surfactant in water according to the national standard method of methylene blue spectrophotometry for measuring the anionic surfactant in water (7494-87), and the findings are found after understanding the existing fully-automatic anionic surfactant measuring instrument: some anionic surfactant testers adopt a flow injection method, do not adopt a traditional national standard method, have higher requirements on water samples and are inconvenient to widely use; some instruments are designed according to the national standard method, but a flow path system adopts an injector to inject three different reagents, namely an extracting agent, methylene blue and a detergent, so that cross contamination is easily caused, and after the methylene blue and the detergent are injected, residual moisture in the injector can generate great interference on anions to be measured; some instruments are designed according to the national standard method, but a split type separation volume fixing cup is adopted, so that the glassware is fragile, the volume fixing process is slow, and the defects are obvious.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a flow path system of full-automatic aquatic anion surfactant apparatus is provided to solve the defect that exists among the prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a flow path system of a full-automatic tester for anionic surfactants in water comprises a water sample treatment system, a washing and constant volume system, an impurity and moisture membrane filtration and separation system and a waste liquid collection and separation system;

the water sample treatment system comprises a water sample cup, a pure water cup communicated with the water sample cup through a pipeline, a No. 1 three-way valve sequentially communicated with the water sample cup through an upper opening of a No. 2 three-way valve, a methylene blue reagent cup and an injection pump communicated with the water sample cup through a pipeline; the No. 5 port of the injection pump is communicated with the water sample cup, the No. 1 port of the injection pump is communicated with the chloroform reagent cup, the No. 1-8 ports of the injection pump are all connected with the injector, and the No. 1-8 ports can be opened or closed under the control of the controller;

the washing and constant volume system comprises a constant volume cup and a washing cup which are connected in series, and the washing cup is communicated with the No. 1 three-way valve and the detergent reagent cup through a lower opening of the No. 2 three-way valve; the constant volume cup is respectively communicated with a No. 4 port and a No. 7 port of the injection pump through a pipeline; the washing cup is communicated with a No. 6 port of the injection pump through a pipeline;

the impurity water membrane filtration and separation system comprises a filtration membrane and a water removal membrane which are arranged between the fixed volume cup and the No. 4 port of the injection pump;

the waste liquid collecting and separating system comprises a water outlet pipe positioned at the bottom of the washing cup, and a pinch valve is arranged on the water outlet pipe;

furthermore, the pipelines of the pure water cup and the water sample cup are provided with diaphragm pumps;

further, a No. 1 peristaltic pump is arranged between the No. 1 three-way valve and the No. 2 three-way valve;

further, the washing cup is communicated with the water sample cup through a pipeline, and a No. 2 peristaltic pump is arranged on the pipeline;

further, the washing cup is connected with one end of a two-way valve through a pipeline, and the other end of the two-way valve is communicated with outside air; the No. 1 port of the injection pump is communicated with the outside air;

further, the water sample cup and the washing cup are respectively provided with a stirring motor;

the utility model has the advantages that: the flow path system has the advantages of cross contamination prevention, fast operation, compact structure and the like.

Drawings

FIG. 1 is a schematic structural view of the present invention;

the reference numerals are explained below:

1. the device comprises an injection pump, 2, a washing cup, 3, a water sample cup, 4, a pure water cup, 5, a constant volume cup, 6, a cuvette, 7, a chloroform reagent cup, 8, a methylene blue reagent cup, 9, a detergent reagent cup, 10, a No. 1 three-way valve, 11, a No. 2 three-way valve, 12, a No. 1 peristaltic pump, 13, a No. 2 peristaltic pump, 14, a two-way valve, 15, a diaphragm pump, 16, a pinch valve, 17, a filtering membrane, 18 and a water removing membrane;

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, a flow path system of a full-automatic tester for anionic surfactants in water comprises a water sample treatment system, a washing and constant volume system, an impurity and moisture membrane filtration and separation system and a waste liquid collection and separation system;

the water sample treatment system comprises a water sample cup 3, a pure water cup 4 communicated with the water sample cup 3 through a pipeline, a No. 1 three-way valve 10 sequentially communicated with the water sample cup 3 through an upper opening of a No. 2 three-way valve 11, a methylene blue reagent cup and an injection pump 1 communicated with the water sample cup through a pipeline; the injection pump is provided with a No. 1 port, a No. 2 port and a No. 3 port … … 8, wherein each port is connected with an injector on the injection pump, and each port of the injection pump rotary valve is sequentially a No. 1 port, a No. 2 port, a No. 3 port … … 7 port and a No. 8 port clockwise; the No. 5 port of the injection pump is communicated with the water sample cup, the No. 1 port of the injection pump is communicated with the chloroform reagent cup, the No. 1-8 ports of the injection pump are all connected with the injector, and the No. 1-8 ports can be opened or closed under the control of the controller;

the washing and constant volume system comprises a constant volume cup 5 and a washing cup 2 which are connected in series, wherein the washing cup 2 is communicated with a No. 1 three-way valve 10 and a detergent reagent cup 9 through a lower opening of a No. 2 three-way valve 11; the constant volume cup is respectively communicated with a No. 4 port and a No. 7 port of the injection pump through a pipeline; the washing cup 2 is communicated with a No. 6 port of the injection pump 1 through a pipeline;

the impurity moisture membrane filtration and separation system comprises a filtration membrane 17 and a dewatering membrane 18 which are arranged between the holding cup and the No. 4 port of the injection pump;

the waste liquid collecting and separating system comprises a water outlet pipe positioned at the bottom of the washing cup, and a pinch valve 16 is arranged on the water outlet pipe;

in a specific embodiment, the pipelines of the pure water cup and the water sample cup are both provided with a diaphragm pump 15;

in another specific embodiment, a No. 1 peristaltic pump 12 is arranged between the No. 1 three-way valve 10 and the No. 2 three-way valve 11;

more specifically, the washing cup is communicated with the water sample cup through a pipeline, and a No. 2 peristaltic pump 13 is arranged on the pipeline;

in another embodiment, the washing cup is connected to one end of a two-way valve 14 through a pipe, and the other end of the two-way valve is communicated with the outside air; the No. 1 port of the injection pump is communicated with the outside air;

in order to realize better effects of extraction, washing and the like, the water sample cup and the washing cup are respectively provided with a stirring motor;

the specific working principle, the following will describe in detail each step of the measurement of the liquid exposure system with reference to the specific structure:

1. zero setting: pumping 2ml of chloroform from a No. 1 port of the injection pump; injecting 2ml of chloroform into the cuvette at a No. 3 port of the injection pump, and opening a light path for zeroing;

2. injecting a reagent: the pinch valve is closed, the No. 1 three-way valve is opened upwards, the No. 2 three-way valve is opened downwards, and the two-way valve is opened; starting a No. 1 peristaltic pump, and injecting 50ml of detergent into an inner cylinder of a washing constant volume cup; the lower part of the No. 1 three-way valve is opened, the upper part of the No. 2 three-way valve is opened, the No. 1 peristaltic pump is started, and 25ml of methylene blue is injected into the water sample cup;

3. and (3) injecting an extract liquid: 10ml of chloroform is pumped by a No. 1 port of an injection pump, and 10ml of chloroform is injected by a No. 5 port of the injection pump to a water sample cup;

4. water sample extraction: 5ml of air is pumped by a No. 8 port of the injection pump; injecting 5ml of air through a No. 5 port of an injection pump (the chloroform in the pipeline is pushed into the water sample cup); starting a No. 1 stirring motor, and closing after 30 s;

5. washing with a chloroform extract: starting a No. 2 peristaltic pump to pump 10ml of chloroform until an inner cylinder of the constant volume cup is washed; starting a No. 2 stirring motor, and closing after 30s (for the washing process of the chloroform extraction liquid); a No. 7 port of the injection pump extracts 10ml of air, and extracts 10ml of chloroform in the washing cup to the outer cylinder of the washing volumetric cup by utilizing air pressure; finally, air is discharged through a No. 8 port of the injection pump;

wherein, the three processes of extraction liquid injection, water sample extraction and chloroform extraction liquid washing are repeated for three times to complete three times of extraction specified by the national standard.

6. And (3) volume fixing: 20ml of chloroform is pumped by a No. 1 port of the injection pump; injecting 20ml of chloroform into a No. 6 port of an injection pump until a volumetric cup is washed; 5ml of air is pumped by a No. 8 port of the injection pump; injecting 5ml of air through a No. 6 port of an injection pump, and pushing chloroform; starting the stirring motor for 10s, and then closing; injecting a No. 1 port of a pump, extracting 20-22ml of air, extracting 20ml of chloroform in a washing pump to a constant volume cup by utilizing air pressure, and defaulting to 50ml of constant volume; 50ml of air is extracted from a No. 8 port of the injector; 50ml of air is pushed out from a No. 7 port of the injector;

7. measurement: the injection pump No. 8 pumps 10ml of air; 10ml of air is pushed out from a No. 4 port of the injection pump, and the pipeline is emptied; 5ml of chloroform is pumped by a No. 4 port of the injection pump; a No. 3 port of the injection pump is pushed into a cuvette for 2ml of chloroform; opening a light path to measure the absorbance and calculate the concentration (the standard curve is the same as the water sample making process, and only the concentration corresponds to the absorbance); cleaning a filtering membrane: no. 1, 5ml (open) of chloroform was extracted, and No. 4, pushout (number of repetitions open) (above for measurement); closing the two-way valve, opening the pinch valve, starting the No. 2 peristaltic pump, discharging waste liquid (time is open), and then closing the No. 2 peristaltic pump; opening the two-way valve, closing the pinch valve, activating the diaphragm pump, washing the agitator motor and the aspiration line with about 50-60ml of water, and then closing the diaphragm pump

8. Cleaning: pumping 10ml of chloroform by using an injection pump 1, pushing 10ml of chloroform to a constant volume cup by using an injection pump 4, closing a two-way valve, opening a pinch valve, starting a peristaltic pump 2, and discharging cleaning water;

the above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A flow path system of a full-automatic tester for anionic surfactants in water is characterized by consisting of a water sample treatment system, a washing and constant volume system, an impurity and moisture membrane filtration and separation system and a waste liquid collection and separation system;

the water sample treatment system comprises a water sample cup, a pure water cup communicated with the water sample cup through a pipeline, a No. 1 three-way valve sequentially communicated with the water sample cup through an upper opening of a No. 2 three-way valve, a methylene blue reagent cup and an injection pump communicated with the water sample cup through a pipeline; the injection pump is provided with a No. 1 port, a No. 2 port and a No. 3 port … … 8, wherein each port is connected with an injector on the injection pump, and each port of the injection pump rotary valve is sequentially a No. 1 port, a No. 2 port, a No. 3 port … … 7 port and a No. 8 port clockwise; the No. 5 port of the injection pump is communicated with the water sample cup, the No. 1 port of the injection pump is communicated with the chloroform reagent cup, the No. 1-8 ports of the injection pump are all connected with the injector, and the No. 1-8 ports can be opened or closed under the control of the controller;

the washing and constant volume system comprises a constant volume cup and a washing cup which are connected in series, and the washing cup is communicated with the No. 1 three-way valve and the detergent reagent cup through a lower opening of the No. 2 three-way valve; the constant volume cup is respectively communicated with a No. 4 port and a No. 7 port of the injection pump through a pipeline; the washing cup is communicated with the No. 6 port of the injection pump through a pipeline, and the impurity and water membrane filtration and separation system comprises a filtration membrane and a water removal membrane which are arranged between the fixed-volume cup and the No. 4 port of the injection pump;

the waste liquid collecting and separating system comprises a water outlet pipe positioned at the bottom of the washing cup, and a pinch valve is arranged on the water outlet pipe.

2. The flow path system of the full-automatic tester for the anionic surfactant in water as claimed in claim 1, wherein: and the pipelines of the pure water cup and the water sample cup are provided with diaphragm pumps.

3. The flow path system of the full-automatic tester for the anionic surfactant in water as claimed in claim 2, wherein: and a No. 1 peristaltic pump is arranged between the No. 1 three-way valve and the No. 2 three-way valve.

4. The flow path system of the full-automatic tester for the anionic surfactant in water as claimed in claim 3, wherein: the washing cup and the water sample cup are communicated through a pipeline, and a No. 2 peristaltic pump is arranged on the pipeline.

5. The flow path system of the full-automatic tester for the anionic surfactant in water as claimed in claim 4, wherein: the washing cup is connected with one end of a two-way valve through a pipeline, and the other end of the two-way valve is communicated with outside air; the No. 1 port of the injection pump is communicated with the outside air.

6. The flow path system of the full-automatic tester for the anionic surfactant in water as claimed in claim 5, wherein: and the water sample cup and the washing cup are respectively provided with a stirring motor.