CN116519610A - Nutritive salt in-situ analysis device - Google Patents
Nutritive salt in-situ analysis device Download PDFInfo
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- CN116519610A CN116519610A CN202310531933.2A CN202310531933A CN116519610A CN 116519610 A CN116519610 A CN 116519610A CN 202310531933 A CN202310531933 A CN 202310531933A CN 116519610 A CN116519610 A CN 116519610A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 49
- 230000000050 nutritive effect Effects 0.000 title claims abstract description 25
- 238000010249 in-situ analysis Methods 0.000 title claims abstract description 18
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 179
- 238000007789 sealing Methods 0.000 claims abstract description 62
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 59
- 238000005070 sampling Methods 0.000 claims abstract description 58
- 235000015097 nutrients Nutrition 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 66
- 238000011065 in-situ storage Methods 0.000 claims description 17
- 239000013307 optical fiber Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000004737 colorimetric analysis Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 22
- 238000004458 analytical method Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- 230000001681 protective effect Effects 0.000 description 16
- 230000003287 optical effect Effects 0.000 description 12
- 238000005259 measurement Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/031—Multipass arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/031—Multipass arrangements
- G01N2021/0314—Double pass, autocollimated path
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N2021/0325—Cells for testing reactions, e.g. containing reagents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
- G01N2021/054—Bubble trap; Debubbling
Abstract
The application relates to a nutritive salt in-situ analysis device, which comprises a shell, a storage part, a colorimetric part and a sampling part, wherein the storage part, the colorimetric part and the sampling part are arranged in the shell, and the storage part is used for storing a reagent required by nutritive salt colorimetric and injecting the reagent into the colorimetric part; the storage section includes: the device comprises a plurality of reagent containers, a pressure control part for adjusting the pressure in the reagent containers and a liquid draining part for draining the reagents in the reagent containers; the two ends of the reagent container can be respectively communicated with the pressure control piece and the liquid discharge piece; the peristaltic pump can be communicated with any reagent container through the conversion piece and change the air pressure in the reagent container, the peristaltic pump is communicated with the external environment, and the sealing piece is used for sealing the reagent container. The method has the effects of reducing the influence of micro-bubble contrast color experiments in the reagent and improving the analysis accuracy of the nutrient salt content.
Description
Technical Field
The application relates to the field of water sample detection equipment, in particular to a nutritive salt in-situ analysis device.
Background
The nutrient salts in water are mainly elements related to the growth of marine plants, and are generally N, P, si and the like. They are components necessary for the growth and reproduction of marine phytoplankton and are also the basis of the primary productivity of the ocean and the food chain. In turn, the distribution of nutrient salts in seawater is significantly affected by marine biological activity, and the distribution of nutrient salts is affected by chemical, geological and hydrographic factors, which are not uniform nor constant in their content and distribution in seawater, with significant seasonal and regional variations. The determination of the content of the seawater nutrient salt has important value for preventing red tide and analyzing marine ecology.
The existing analysis of the nutrient salt content in the water area is generally carried out by a laboratory analysis method, namely, the laboratory analysis method is carried back to a laboratory for experiments after sampling in a selected water area, and the method is characterized in that a more comprehensive analysis experiment can be carried out, but the result measured in the process of carrying back to the laboratory analysis has a certain deviation from the actual situation due to the stronger timeliness of the nutrient salt content in the water area, and the deviation is particularly remarkable when the water flow condition in the water area is complex; secondly, in-situ nutrient salt analysis equipment is adopted to effectively solve the problem of timeliness of nutrient salt distribution through on-site sampling analysis, the in-situ nutrient salt analysis equipment is usually arranged on a buoy or a ship body, the water taking part of the in-situ nutrient salt analysis equipment enters a corresponding water area to take water and then on-site experimental analysis is carried out, and the experimental analysis method usually adopts a spectrophotometry to carry out colorimetric analysis of light.
In view of the above-mentioned existing nutrient salt analysis method, the inventors found that, although the problem of nutrient salt distribution timeliness is overcome by performing on-site sampling analysis by using an in-situ nutrient salt analysis device, as the device needs to be set in a water area for sampling for a long time, a part of air in a reagent container enters a reagent along with fluctuation of the water surface and change of the temperature, tiny bubbles are formed to adhere below the liquid surface of the reagent, the volume of the part of bubbles is small and is very difficult to discharge, and the bubbles scatter light paths in the reagent along with participation of the reagent in colorimetric analysis experiments of a water sample, so that errors are generated in measurement results.
Disclosure of Invention
In order to reduce the influence of micro bubbles in a reagent on a colorimetric experiment and improve the analysis accuracy of the content of nutritive salt, the application provides a nutritive salt in-situ analysis device.
The application provides a nutritive salt normal position analytical equipment adopts following technical scheme:
the nutrient salt in-situ analysis device comprises a shell, a storage part, a colorimetric part and a sampling part, wherein the storage part, the colorimetric part and the sampling part are arranged in the shell, and the storage part is used for storing reagents required by nutrient salt colorimetric and injecting the reagents into the colorimetric part; the storage section includes: the device comprises a plurality of reagent containers, a pressure control part for adjusting the pressure in the reagent containers and a liquid draining part for draining the reagents in the reagent containers; the two ends of the reagent container can be respectively communicated with the pressure control piece and the liquid discharge piece;
the peristaltic pump can be communicated with any reagent container through the conversion piece and change the air pressure in the reagent container, the peristaltic pump is communicated with the external environment, and the sealing piece is used for sealing the reagent container.
Through adopting above-mentioned technical scheme, when the user uses, the user adds the reagent that is used for detecting different nutritive salt in a plurality of reagent containers, and when carrying out experimental measurement, the user sends the water sample into than the district through sampling portion. The user rotates the conversion piece according to the different operation conversion pieces of the nutrient salt types to be measured, the peristaltic pump is communicated with the reagent container containing the corresponding reagent by utilizing the code wheel, the peristaltic pump pumps out the gas in the reagent container after the peristaltic pump is communicated, the pressure in the reagent container is reduced, small bubbles attached to the container wall below the liquid level along with the pressure reduction in the reagent container expand due to the fact that the internal air pressure is larger than the air pressure in the reagent container, the buoyancy born by the small bubbles is increased along with the increase of the volume, and finally the small bubbles float upwards and are discharged from the reagent. And then, the user operates the liquid discharging part to discharge the reagent into the colorimetric part to be mixed with the water sample for colorimetric experiments. The light path divergence and loss caused by bubble reflection and refraction light paths can be reduced, so that the content of different nutrient salts in the water area can be accurately measured.
Optionally, the conversion piece may be a code disc, the code disc is connected in the casing, and a hose of the peristaltic pump passes through the code disc; the sealing element can be a sealing disc, the sealing disc is connected to the code disc in a switching way, a plurality of reagent containers are connected to the sealing disc, and a hose of the peristaltic pump can rotate along with the code disc to be communicated with a corresponding reagent container at any reagent container position.
When the peristaltic pump is used, a user can adjust different reagent containers through the code disc to be communicated with the peristaltic pump, the sealing disc plays a role in sealing, pressure relief between a hose of the peristaltic pump and the reagent containers is prevented, and the peristaltic pump is sealed.
Optionally, the switching piece can also be an electric control multi-way valve, a hose of the peristaltic pump is connected to a trunk valve port of the electric control multi-way valve, and the plurality of reagent containers are respectively communicated with branch valve ports of the electric control multi-way valve.
When the peristaltic pump is used by a user, the user can control the corresponding branch valve port and the corresponding trunk valve port of the electric control multi-way valve to be communicated, so that the peristaltic pump can be communicated with the corresponding reagent container quickly and conveniently.
Optionally, the flowing back piece includes numerical control multiport valve, syringe and syringe pump, and a plurality of reagent container bottom communicates respectively in each branch road valve port of numerical control multiport valve, and syringe one end communicates in the trunk road valve port of numerical control multiport valve, and the syringe is installed in the syringe pump, and the one end that the numerical control multiport valve was kept away from to the syringe communicates in the colourimetric portion, and the syringe pump can control the syringe and draw quantitative reagent and pour into the colourimetric portion from corresponding reagent container through numerical control multiport valve in, the syringe is connected with the check valve, and the liquid flow direction is from numerical control multiport valve flow direction syringe in the check valve, and the flowing back hole has been seted up to the piston of syringe, and the internal rigid coupling of flowing back of piston has the pressure valve, and the pressure valve can communicate in the colourimetric portion, and the reagent in the syringe can get into the colourimetric portion through the pressure valve.
Through adopting above-mentioned technical scheme, when the user uses, numerical control multiport valve control corresponds branch road valve port is opened, afterwards, drive the syringe by the syringe pump, according to the reagent in the corresponding reagent container of experimental needs through numerical control multiport valve extraction ration, then numerical control multiport valve is closed, the syringe pump control syringe injects the reagent of taking out into the colourimetric part, thereby comparatively accurate extraction required quantity reagent reduces the reagent extravagant, simultaneously because the weight of reagent is showing and is higher than gas, consequently follow reagent container bottom extraction also can avoid mixing the bubble once more. The check valve can play a role in preventing reagent from flowing back and polluting the reagent in the reagent container, when the injection pump controls the injector to extract quantitative reagent from the reagent container, the numerical control multi-way valve is closed, the injection pump controls the piston of the injector to compress the space in the injector, so that the extracted reagent continuously increases along with the compression pressure to open the pressure valve to enter the colorimetric part, and the pressure valve returns to the original position after the reagent in the injector is pumped into the colorimetric part by the injector.
Optionally, the colorimetric part includes U type cell, light source and photoelectric detector, the U type cell includes side tube one, side tube two and a bottom tube, two side tubes are connected in the both ends of bottom tube respectively, two side tubes all are linked together with the bottom tube, side tube one is linked together with the syringe, side tube two is linked together with the sampling part, the light source sets up in the casing and is close to bottom tube one end position department, the light path direction that the light source sent and the axial syntropy setting of bottom tube, photoelectric detector sets up in the casing, photoelectric detector is close to the one end that the light source position department was kept away from to the bottom tube, photoelectric detector is used for the wavelength of the light path of analysis through the bottom tube.
Through adopting above-mentioned technical scheme, when the user uses, the water sample that sampling portion obtained gets into the bottom tube of U type cell through side pipe two, and reagent in the reagent container gets into the bottom tube through side pipe one, and water sample and reagent mix in the bottom tube, later the user opens the light source, and the light path that the light source sent passes the bottom tube along the axial of bottom tube and falls on photoelectric detector, and the optical path length is the length of bottom tube promptly, and photoelectric detector analysis light path's wavelength and with data transfer out to the user can be through the content of corresponding inorganic salt in the wavelength analysis water sample of light.
Optionally, the U type cell slope sets up, and the bottom tube of U type cell is by connecting in the one end of side pipe one to the one end upward sloping setting of being connected in side pipe two.
By adopting the technical scheme, when a user uses the device, the bottom tube of the U-shaped cuvette is obliquely arranged, so that bubbles entering the bottom tube are reduced, a small amount of bubbles remained in the reagent can be attached to and stagnated at the bending position of the connecting position of the side tube I and the bottom tube, and even if a small amount of bubbles enter the bottom tube, the bubbles can float to the bending position of the connecting position of the side tube II and the bottom tube along the bottom tube due to the oblique arrangement of the bottom tube; the bubble in the water sample then is located the bottom tube top owing to side tube two, thereby bubble density is less than the water sample come-up in side tube two, can't get into in the bottom tube, through the slope setting of U type cell, further prevented the bubble to get into the bottom tube in influence the degree of accuracy of colorimetric experiment.
Optionally, the light source includes laser instrument and beam splitter, and U type cell bottom rigid coupling has the contrast pipe, and the axial of contrast pipe and the axial mutual parallel arrangement of bottom pipe, the length, width and the pipe wall thickness of contrast pipe are all the same with the bottom pipe, and the beam splitter separates the light path that the laser instrument sent, makes one of them light path direction pass the bottom pipe along the axis of bottom pipe, makes another light path pass the contrast pipe along the axis of contrast pipe, and two light paths all can fall to photoelectric detector.
Through adopting above-mentioned technical scheme, when the user uses, divide into two with the light path that the laser instrument sent through the beam splitter, two light paths pass respectively along the axial of contrast pipe and the axial of end pipe and contrast pipe, because the length, width and the close physical characteristics such as thickness of end pipe are the same, two light paths all fall on the photodetector, because two light beams are sent by same LED lamp source, therefore have the same frequency and wavelength. The light source intensity and the sensitivity of the photodetector vary, which may cause errors in the measured values. The control light path through the control tube serves to monitor this variation over time and correct for the effects of the variation.
Optionally, each light path outlet of beam splitter all is connected with optic fibre, and every optic fibre is kept away from beam splitter one end all and is connected with the anti-dazzling screen, and two optic fibre are kept away from beam splitter's one end and are connected in the one end of bottom tube and contrast pipe respectively.
Through adopting above-mentioned technical scheme, when the user uses, the light path that the LED light source sent is divided into two through the beam splitter and gets into optic fibre through two light path export respectively, passes the bottom tube and passes the reference tube along the axis of reference tube respectively through the shading sheet is final by the optic fibre transmission respectively along the axis of bottom tube afterwards, and the optical fiber transmission light beam can reduce the light transmission in-process and takes place scattering phenomenon under gaseous environment and influence colorimetric experiment precision, and the shading sheet can filter scattered light, plays the effect of spotlight.
Optionally, the sampling portion includes normal position filter, direct current water pump and sampling tube, and the sampling tube passes the casing setting, and normal position filter connects in sampling tube one end, and normal position filter connects in direct current water pump, and direct current water pump is linked together with the sampling tube through normal position filter, and direct current water pump's delivery outlet is connected with and send the sampling tube, send the two-phase intercommunication of sampling tube and side pipe.
Through adopting above-mentioned technical scheme, when the user uses, direct current pump pumps the water sample in waters along the sampling tube, and the impurity in the water sample of water sample through normal position filter filtering, later direct current pump pumps the water sample after filtering into the sampling tube, and the water sample flows into side pipe two along the sampling tube, gets into the bottom pipe and participates in the colorimetric experiment afterwards.
Optionally, a water-proof layer is fixedly connected at a position between the casing corresponding to the sampling part and the colorimetric part, the water-proof layer covers the inner peripheral wall of the casing, the sample feeding pipe passes through the water-proof layer, a sealing ring is fixedly connected at a position of the water-proof layer corresponding to the sample feeding pipe, the inner side of the sealing ring is abutted to the outer peripheral wall of the sample feeding pipe, and the outer side of the sealing ring is abutted to the water-proof layer; the outer side of the shell is fixedly connected with a waterproof protective shell, the waterproof protective shell covers the outer side of the shell and is arranged, the sampling tube penetrates through the waterproof protective shell, a flange ring is fixedly connected to the position of the waterproof protective shell corresponding to the sampling tube, and the flange ring is abutted against the outer peripheral wall of the sampling tube; a gap is formed between the waterproof protective shell and the shell, and a position, corresponding to the sampling tube, between the waterproof protective shell and the shell is sealed and arranged for arranging a circuit wiring.
Through adopting above-mentioned technical scheme, when the user uses, the water-proof layer plays the effect of each precision equipment and circuit in the protection colourimetric portion, and the sealing ring plays the clearance that prevents to get into the sample portion and get into the colourimetric portion through the water-proof layer with send between the appearance pipe, and waterproof protective housing plays whole waterproof effect, and the clearance between waterproof protective housing and the casing is used for walking the line and can reduce wiring in the equipment and walk the line chaotic influence use, and the flange circle plays the effect that prevents rivers and get into the sample portion through the clearance between sampling tube and the waterproof protective housing. The multistage waterproof device prevents water flow from entering the equipment, protects a circuit, and reduces the loss of equipment maintenance and replacement.
Optionally, each reagent container is internally provided with a pressure sensor, the pressure sensor is located at a position of the reagent container close to the peristaltic pump, the casing is connected with a control module, the peristaltic pump, the conversion piece and each pressure sensor are connected to the control module through circuits, when the pressure value in the reagent container changes with the set pressure value, the pressure sensor sends out an electric signal to be transmitted to the control module, and the control module controls the conversion piece to enable the peristaltic pump to be connected with the corresponding reagent container, so that the pressure in the reagent container is regulated.
By adopting the technical scheme, when the device is used by a user, the user can adjust the air pressure in the reagent container according to the needs, and when the device is used in summer, the user can properly reduce the set pressure in the reagent container, the peristaltic pump is used for discharging the air in the reagent container to reduce the pressure, and the pressure in the reagent container reduces the expansion heat absorption of the air, so that the temperature in the reagent container is slightly adjusted; in winter, the user can properly increase the set pressure in the actual container, the peristaltic pump pumps the gas into the actual container to increase the pressure, and the pressure in the reagent container increases the compression heat release of the gas so as to slightly adjust the temperature in the reagent container. Meanwhile, after part of the reagent in the reagent container is discharged, the pressure sensor sends out an electric signal according to the set pressure value to be transmitted to the control module, and the control module controls the numerical control multi-way valve to close the peristaltic pump to pump gas into the reagent container so as to improve the pressure, so that the pressure in the reagent container returns to the set value again.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the design of the pressure control part, the peristaltic pump, the conversion part, the sealing part, the liquid discharging part, the code disc, the sealing groove, the sealing block, the placing groove, the stepping motor, the gear shaft, the reagent container, the electric control multi-way valve, the sealing sleeve, the sealing plug, the colorimetric part and the sampling part can discharge micro-volume bubbles attached to the reagent before the colorimetric experiment is carried out on the reagent, so that the small bubbles are prevented from scattering the light path passing through the colorimetric part in the light path experiment, the content of nutrient salt in the water sample measured by the colorimetric experiment is influenced, and the effect of improving the experimental measurement precision is achieved;
the design of the U-shaped cuvette, the side tube I, the side tube II, the bottom tube, the control tube, the light source, the laser, the beam splitter, the optical fiber, the shading sheet and the photoelectric detector can eliminate errors caused by the fluctuation of the laser intensity and the sensitivity of the photoelectric detector through the control tube, and correct experimental results measured by the optical path of the bottom tube through the intensity fluctuation compensation of the optical path passing through the control tube;
3. the numerical control multi-way valve, the injector, the injection pump, the check valve and the pressure valve are designed, quantitative reagents can be extracted to enter the bottom tube for performing the light colorimetric experiment, the reagent extraction precision is improved, the experiment precision is further improved, and the reagent waste is reduced.
Drawings
FIG. 1 is a schematic overall structure of a first embodiment of the present application;
FIG. 2 is a cross-sectional view of the overall structure of the first embodiment of the present application;
FIG. 3 is a schematic view of a storage portion according to a first embodiment of the present application;
FIG. 4 is a cross-sectional view of a sampling portion according to a first embodiment of the present application;
FIG. 5 is a cross-sectional view of a colorimetric section structure according to an embodiment of the present application;
FIG. 6 is a cross-sectional view of a reservoir structure according to an embodiment of the present application;
FIG. 7 is a control flow diagram of a first embodiment of the present application;
fig. 8 is a schematic diagram of a storage portion structure according to a second embodiment of the present application.
Reference numerals illustrate: 1. a storage section; 11. a reagent container; 12. a pressure control member; 121. a peristaltic pump; 122. a conversion member; 1221. a code wheel; 1222. a gear shaft; 1223. a stepping motor; 1224. sealing grooves; 1225. an electrically controlled multi-way valve; 123. a seal; 1231. a sealing block; 1232. a sealing plate; 1233. a placement groove; 1234. sealing sleeve; 1235. a sealing plug; 13. a liquid discharge member; 131. a numerical control multi-way valve; 132. a syringe; 133. a syringe pump; 134. a check valve; 135. a liquid discharge hole; 136. a pressure valve; 2. a colorimetric section; 21. a U-shaped cuvette; 211. a side pipe I; 212. a bottom tube; 213. a second side pipe; 22. a light source; 221. a laser; 222. a beam splitter; 223. an optical fiber; 224. a light shielding sheet; 23. a photodetector; 24. a control tube; 3. a sampling unit; 31. a direct current water pump; 32. an in situ filter; 33. a sampling tube; 34. a sample feeding tube; 35. a seal ring; 4. a waterproof protective shell; 5. a housing; 51. a flange ring; 52. a water-resistant layer; 6. a pressure sensor; 7. a control module; 8. and a wireless module.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-8.
The embodiment of the application discloses a nutritive salt normal position analytical equipment, refer to fig. 1 and 2, including casing 5 and set up storage portion 1, colourimetric portion 2 and sampling portion 3 in casing 5, storage portion 1 and sampling portion 3 all communicate in colourimetric portion 2. The storage part 1 is used for storing reagents required by nutrient salt colorimetry and injecting the reagents into the colorimetry part 2. The sampling unit 3 is used for taking a water sample from a water area where the device is located and injecting the water sample into the colorimetric unit 2. The colorimetric part 2 is used for mixing a water sample with reagents required by a colorimetric experiment and performing the colorimetric experiment to obtain the content of corresponding nutritive salt in the water sample, and a user can set different kinds of nutritive salt colorimetric reagents in the storage part 1 so as to perform colorimetric experiment measurement on non-specific kinds of nutritive salt.
Referring to fig. 2-4, a waterproof protective housing 4 is fixedly connected to the outside of the housing 5, the waterproof protective housing 4 can be arranged to cover the housing 5, and the waterproof protective housing 4 is used for protecting the analysis device from water flowing into the device to damage the device. The sampling part 3 comprises a direct current water pump 31, an in-situ filter 32 and a sampling tube 33, wherein the direct current water pump 31 is fixedly connected in the shell 5, the in-situ filter 32 is arranged at the position of an input port of the direct current water pump 31, and the in-situ filter 32 is communicated with the direct current water pump 31. The sampling tube 33 is fixedly connected to the in-situ filter 32, and the sampling tube 33 is communicated with the in-situ filter 32. The sampling tube 33 is disposed through the housing 5 and the waterproof housing 4 at an end far away from the in-situ filter 32, a gap is formed between the waterproof housing 4 and the housing 5, and the gap between the waterproof housing 4 and the housing 5 is used for laying a circuit. The position between the waterproof protective housing 4 and the shell 5 corresponding to the sampling tube 33 is completely sealed, the position of the shell 5 corresponding to the peripheral wall of the sampling tube 33 is fixedly connected with a flange ring 51, the inner peripheral wall of the flange ring 51 abuts against the outer peripheral wall of the sampling tube 33, and the flange ring 51 covers the gap between the sampling tube 33 and the shell 5. The output port of the direct-current water pump 31 is connected with a sample feeding pipe 34, and the sample feeding pipe 34 is communicated with the colorimetric part 2. The direct-current water pump 31 is used for pumping an external water sample from the sampling tube 33 to the sample feeding tube 34 through the in-situ filter 32, and finally the water sample enters the colorimetric part 2 along the sample feeding tube 34 for colorimetric experiments. The position department rigid coupling that casing 5 inner peripheral wall corresponds between sampling portion 3 and the colourimetric portion 2 has water barrier 52, and send the appearance pipe 34 to pass water barrier 52 setting, and water barrier 52 corresponds the outer peripheral wall position department rigid coupling that send appearance pipe 34 has sealing ring 35, and sealing ring 35 shutoff water barrier 52 and send the clearance setting between the appearance pipe 34.
Referring to fig. 2, 3 and 5, the cuvette portion 2 includes a U-shaped cuvette 21, a light source 22, a photodetector 23 and a reference tube 24, the U-shaped cuvette 21 is composed of a first side tube 211, a second side tube 213 and a bottom tube 212, the first side tube 211 and the second side tube 213 are fixedly connected to the bottom tube 212 at two axial ends of the bottom tube 212, the first side tube 211 and the second side tube 213 are communicated through the bottom tube 212, the first side tube 211 is communicated with the storage portion 1, the second side tube 213 is communicated with the sample feeding tube 34, and a sealing ring is sleeved at the connecting position of the sample feeding tube 34 and the second side tube 213 for preventing water samples from leaking. The U-shaped cuvette 21 is obliquely arranged, the bottom tube 212 is obliquely arranged upwards from one end close to the first side tube 211 to one end close to the second side tube 213, and an included angle formed between the axial direction of the bottom tube 212 and the horizontal direction is 30 degrees to 60 degrees. The reference tube 24 is fixedly connected to the bottom of the bottom tube 212 of the U-shaped cuvette 21, and the length, width and thickness of the reference tube 24 are the same as those of the bottom tube 212. The axial direction of the reference tube 24 and the axial direction of the bottom tube 212 are arranged parallel to each other, and the inside of the reference tube 24 is vacuum-arranged.
Referring to fig. 2, 3 and 5, the light source 22 includes a laser 221 and a beam splitter 222, where the laser 221 is fixedly connected to a position in the housing 5, which is close to the side tube 211, corresponding to the bottom tube 212. The beam splitter 222 is fixedly connected to the housing 5 at a position corresponding to the laser 221, the optical path emitted by the laser 221 is divided into two beams of optical paths by the beam splitter 222, each optical path outlet of the beam splitter 222 is fixedly connected with an optical fiber 223, each optical fiber 223 is connected with a light shielding piece 224, and one ends of the two optical fibers 223, which are far away from the beam splitter 222, are fixedly connected to the bottom tube 212 and one end, close to the side tube 211, of the contrast tube 24 respectively. The optical path direction from the optical fiber 223 connected to the bottom tube 212 is set through the bottom tube 212 along the axis of the bottom tube 212, and the optical path direction from the optical fiber 223 connected to the control tube 24 is set through the control tube 24 along the axis of the control tube 24. The optical path directions of the light beams emitted from the two optical fibers 223 are arranged parallel to each other. The photodetector 23 is fixedly connected to the housing 5 at a position far from the laser 221 along the horizontal direction, and the light paths transmitted by the two optical fibers 223 can fall onto the photodetector 23.
Referring to fig. 2, 3 and 6, the storage part 1 includes six reagent containers 11, a pressure control member 12 for adjusting the pressure in the reagent containers 11, and a drain member 13 for draining the reagent in the reagent containers 11. The reagent vessel 11 is tubular, and both ends of the reagent vessel 11 in the axial direction thereof can be respectively communicated with the pressure control member 12 and the drain member 13. Pressure control member 12 includes peristaltic pump 121, switch 122, and seal 123, switch 122 including code wheel 1221 and stepper motor 1223. The code wheel 1221 is rotatably connected in the housing 5, the code wheel 1221 is located in the housing 5 at a position above the corresponding reagent container 11, and the code wheel 1221 can rotate around its own axis. Peristaltic pump 121 is fixedly connected to the side of code wheel 1221, which is far away from reagent container 11, and the hose of peristaltic pump 121 is arranged through code wheel 1221. A sealing groove 1224 is formed in one side, far away from the peristaltic pump 121, of the code wheel 1221, and a hose of the peristaltic pump 121 is communicated with the sealing groove 1224 of the code wheel 1221. The sealing member 123 includes a sealing disc 1232, the sealing disc 1232 is fixedly connected in the housing 5, the sealing disc 1232 and the code disc 1221 are coaxially arranged, a sealing block 1231 is fixedly connected at the top of the sealing disc 1232, the sealing block 1231 is made of elastic rubber, and the sealing block 1231 is slidably arranged in the sealing groove 1224 of the code disc 1221. The sealing block 1231 is provided with a placement groove 1233 corresponding to each reagent container 11, and the six reagent containers 11 are respectively arranged in the six placement grooves 1233 of the sealing block 1231 near the top, and the sealing block 1231 can be abutted against the peripheral wall of each reagent container 11. Rotation of the code wheel 1221 rotates the flexible tubing of the peristaltic pump 121 to the corresponding reagent container 11 position, thereby placing the peristaltic pump 121 in communication with the corresponding reagent container 11. The stepper motor 1223 is fixedly connected to the housing 5 near the position of the code wheel 1221, the output shaft of the stepper motor 1223 is fixedly connected with a gear shaft 1222, the gear shaft 1222 is meshed with the code wheel 1221, the stepper motor 1223 drives the gear shaft 1222 to rotate, and the code wheel 1221 meshed with the gear shaft 1222 can be driven to rotate, so that the position of the peristaltic pump 121 is adjusted, and the peristaltic pump 121 is communicated with the corresponding reagent container 11. The end of the peristaltic pump 121 hose remote from the reagent container 11 protrudes outside the device through the housing 5 and the waterproof protective housing 4.
Referring to fig. 2, 3 and 6, the drain 13 includes a nc multi-way valve 131, an injector 132 and an injection pump 133, six reagent containers 11 are respectively installed at six branch ports of the nc multi-way valve 131, one end of the injector 132 is installed at a trunk port of the nc multi-way valve 131, and the reagent containers 11 can communicate with the injector 132 through the nc multi-way valve 131. A check valve 134 is installed at the connection position of the injector 132 and the numerical control multi-way valve 131, and the liquid flow direction in the check valve 134 is from the numerical control multi-way valve 131 to the injector 132. The piston of the syringe 132 is provided with a drain hole 135, a pressure valve 136 is fixedly connected in the drain hole 135 of the piston, the pressure valve 136 is connected to the side pipe one 211 through a hose, the syringe 132 is communicated with the side pipe one 211 through the pressure valve 136 and the hose, and the reagent in the syringe 132 can enter the side pipe one 211 through the pressure valve 136. The syringe 132 is attached to the syringe pump 133, and the syringe pump 133 can control the syringe 132 to draw out a predetermined amount of reagent from the corresponding reagent container 11 through the nc multi-way valve 131 and inject the reagent into the colorimetric part 2.
Referring to fig. 2, 6 and 7, a pressure sensor 6 is provided in each reagent vessel 11, the pressure sensor 6 being located in the reagent vessel 11 near the peristaltic pump 121. The control module 7 and the wireless module 8 are fixedly connected in the gap between the top of the shell 5 and the waterproof protective shell 4, the peristaltic pump 121, the injection pump 133, the stepping motor 1223, the numerical control multi-way valve 131, the direct-current water pump 31, the photoelectric detector 23, the laser 221 and each pressure sensor 6 are all connected to the control module 7 through circuits, and the control module 7 can control the peristaltic pump 121, the stepping motor 1223, the injection pump 133, the electromagnetic valve, the numerical control multi-way valve 131, the direct-current water pump 31 and the laser 221 to be opened and closed and can receive data sent by the pressure sensor and the photoelectric detector 23. The control module 7 is connected to the wireless module 8, the wireless module 8 is used for transmitting user operation instructions, and transmitting the instructions to the control module 7, so that the control module 7 sends out corresponding electric signals, and meanwhile, the wireless module 8 is also used for transmitting data of the pressure sensor and the photoelectric detector 23 received by the control module 7 to a user side.
The implementation principle of the nutritive salt in-situ analysis device in the first embodiment of the application is as follows: the user sets the pressure in each reagent container 11 through the control module 7, adjusts the temperature of the environment where the reagent is located by adjusting the pressure in the reagent container 11 when the external environment is different, and can properly reduce the set pressure in the reagent container 11 when summer, and discharges the gas in the reagent container 11 through the peristaltic pump 121 to reduce the pressure, so that the pressure in the reagent container 11 reduces the gas expansion heat absorption, and the temperature in the reagent container 11 is slightly adjusted; conversely, in winter, the user can appropriately increase the set pressure in the actual container, pump the air into the actual container through the peristaltic pump 121 to increase the pressure, and the pressure in the reagent container 11 increases the heat release of the compressed air so as to slightly adjust the temperature in the reagent container 11.
When the user needs to perform colorimetric experiments, the user performs colorimetric experiments for determining the content of a certain nutrient salt through user-side setting, the wireless module 8 transmits instructions to the control module 7, and the control module 7 sends out an electric signal to control the stepper motor 1223 to start. The stepper motor 1223 drives the gear shaft 1222 to rotate so as to drive the code wheel 1221 to rotate, and the code wheel 1221 rotates so as to drive the peristaltic pump 121 to move, so that the peristaltic pump 121 is communicated with the reagent container 11 containing the corresponding reagent, and in the process, the sealing block 1231 is slidably connected in the sealing groove 1224 of the code wheel 1221, so that a sealing effect is achieved. After the peristaltic pump 121 is communicated with the reagent container 11 containing the corresponding reagent, the peristaltic pump 121 pumps out air in the reagent container 11, so that the air pressure in the reagent container 11 is reduced, and when the air pressure in the reagent container 11 is lower than the external environment air pressure, the small bubbles attached below the liquid level in the reagent container 11 expand due to the fact that the internal air pressure is higher than the air pressure in the reagent container 11, the buoyancy of the small bubbles increases along with the expansion of the volume of the small bubbles, and the small bubbles float upwards and are discharged from below the liquid level of the reagent. After the small bubbles are discharged, the peristaltic pump 121 stops working, and the control module 7 sends out an electric signal to control the opening of the trunk valve port of the numerical control multi-way valve 131 and the branch valve port connected with the corresponding reagent container 11. At the same time, the control module 7 sends out an electric signal to control the injection pump 133 to start, and the injection pump 133 drives the piston of the injector 132 to move, so that a fixed amount of reagent is extracted from the reagent container 11. The control module 7 then sends a signal to control the digital control multi-way valve 131 to close. The check valve 134 acts to limit the flow of reagent during this process and prevents the reagent from flowing back. The syringe pump 133 then drives the plunger of the syringe 132 to compress the reagent in the syringe 132, causing the reagent to flow out through the pressure valve 136 of the plunger as the compressed pressure in the syringe 132 increases, and eventually the reagent flows along the hose into the side tube 211 and from the side tube 211 completely into the bottom tube 212.
Simultaneously with the reagent entering the bottom tube 212, the control module 7 sends out a signal to control the direct current water pump 31 to be started, the water sample enters the direct current water pump 31 from the sampling tube 33 through the in-situ filter 32, is pumped into the delivery tube 34 by the direct current water pump 31, enters the side tube II 213 along the delivery tube 34, and finally flows into the bottom tube 212 along the side tube II 213 to be fully mixed with the reagent in the bottom tube 212, so that the water sample completely fills the bottom tube 212 of the U-shaped cuvette 21. The bottom tube 212 of the U-shaped cuvette 21 is obliquely arranged, so that bubbles entering the bottom tube 212 are reduced, a small amount of bubbles remained in the reagent can be attached to and stagnated at the bending position of the connecting position of the side tube I211 and the bottom tube 212, and even if a small amount of bubbles enter the bottom tube 212, the bubbles can float to the bending position of the connecting position of the side tube II 213 and the dry-off connecting position along the bottom tube 212 due to the oblique arrangement of the bottom tube 212; the bubble in the water sample is then because the side pipe two 213 is located bottom pipe 212 top, thereby bubble density is less than the water sample and floats in the side pipe two 213, can't get into in the bottom pipe 212, through the slope setting of U type cell 21, further prevented the bubble to get into in the bottom pipe 212 influence the degree of accuracy of colorimetric experiment. At this time, the control module 7 controls the laser 221 to be turned on, the optical path emitted by the laser 221 is split into two beams by the beam splitter 222, and then is transmitted to the bottom tube 212 and the contrast tube 24 from the two optical fibers 223 respectively through the light shielding sheet 224, the optical path transmitted to the bottom tube 212 irradiates onto the photodetector 23 along the axis direction of the bottom tube 212 through the bottom tube 212, and the optical path transmitted to the contrast tube 24 irradiates onto the photodetector 23 along the axis direction of the contrast tube 24 through the contrast tube 24. The intensity of the light source 22 and the sensitivity of the photodetector 23 vary, and an error in the measured value is caused. The control light path through the control tube 24 serves to monitor such variations over time and correct for the effects of the variations, resulting in a more accurate measurement.
After the measurement is finished, the photoelectric detector 23 transmits the measured data such as the intensity, the wavelength and the like of the two light paths to the control module 7, and then the data is transmitted to the wireless module 8 and finally transmitted to the user end after being analyzed by the control module 7, and the obtained result is more accurate and reliable because the comparison tube 24 is arranged to correct errors caused by the intensity fluctuation of the light source 22 and the sensitivity fluctuation of the photoelectric detector 23.
In-situ analysis device for nutrient salts is disclosed in the second embodiment of the present application, which is different from the first embodiment in that the switching member 122 is an electronically controlled multi-way valve 1225, and the sealing member 123 is a sealing sleeve 1234. Referring to fig. 8, the electronically controlled multi-way valve 1225 is fixedly connected to the upper position of the corresponding reagent container 11 in the housing 5, one end of the hose of the peristaltic pump 121 in the housing 5 is installed at the dry-path valve port position of the electronically controlled multi-way valve 1225, the sealing sleeve 1234 is fixedly connected to the connection position of the hose of the peristaltic pump 121 and the dry-path valve port of the electronically controlled multi-way valve 1225, and the sealing sleeve 1234 covers the connection position of the hose of the peristaltic pump 121 and the dry-path valve port of the electronically controlled multi-way valve 1225. The top parts of the six reagent containers 11 are respectively arranged in six branch valve ports of the electric control multi-way valve 1225, and each reagent container 11 can be communicated with the electric control multi-way valve 1225. The peripheral wall of each reagent container 11 is fixedly connected with a sealing plug 1235, the sealing plug 1235 can be sleeved on the branch valve port of the electric control multi-way valve 1225, and the sealing plug 1235 can cover the branch valve port of the electric control multi-way valve 1225. The electrically controlled multi-way valve 1225 is electrically connected to the control module 7.
The implementation principle of the nutritive salt in-situ analysis device in the second embodiment of the application is as follows: when a user needs to do a colorimetric experiment of a certain nutrient salt content, the user sends out a signal through the user side, the signal is transmitted to the control module 7 through the wireless module 8, and the control module 7 sends out an electric signal to control the branch valve port corresponding to the electric control multi-way valve 1225 to be communicated with the trunk valve port, so that the peristaltic pump 121 is communicated with the corresponding reagent container 11. The peristaltic pump 121 discharges the gas in the corresponding reagent container 11 through the electronically controlled multi-way valve 1225, thereby reducing the pressure in the reagent container 11, and expanding and floating the small bubbles attached below the liquid surface to discharge the reagent. In this process, the sealing sleeve 1234 functions to seal the connection between the hose of the peristaltic pump 121 and the stem port of the electrically controlled multi-way valve 1225, and the sealing plug 1235 functions to seal the gap between the branch port of the electrically controlled multi-way valve 1225 and the reagent container 11.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. The utility model provides a nutritive salt normal position analytical equipment, includes casing (5) and sets up storage portion (1), colorimetric portion (2) and sampling portion (3) in casing (5), its characterized in that: the storage part (1) is used for storing reagents required by nutrient salt colorimetry and injecting the reagents into the colorimetry part (2); the storage unit (1) comprises: a plurality of reagent containers (11), a pressure control member (12) for adjusting the pressure in the reagent containers (11), and a liquid discharge member (13) for discharging the reagent in the reagent containers (11); two ends of the reagent container (11) can be respectively communicated with the pressure control piece (12) and the liquid discharge piece (13);
the pressure control piece (12) comprises a peristaltic pump (121), a conversion piece (122) and a sealing piece (123), the peristaltic pump (121) can be communicated with any reagent container (11) through the conversion piece (122) and change the air pressure in the reagent container (11), the peristaltic pump (121) is communicated with the external environment, and the sealing piece (123) is used for sealing the reagent container (11).
2. A nutritive salt in situ analysis apparatus according to claim 1, characterized in that: the conversion piece (122) can be a code disc (1221), the code disc (1221) is switched into the shell (5), and a hose of the peristaltic pump (121) passes through the code disc (1221); the sealing piece (123) can be sealing disk (1232), and sealing disk (1232) switching is in coded disk (1221), and a plurality of reagent container (11) all are connected in sealing disk (1232), and the hose of peristaltic pump (121) can be linked together with corresponding reagent container (11) along with coded disk (1221) rotation arbitrary reagent container (11) position department.
3. A nutritive salt in situ analysis apparatus according to claim 1, characterized in that: the conversion piece (122) can also be an electric control multi-way valve (1225), a hose of the peristaltic pump (121) is connected to a trunk valve port of the electric control multi-way valve (1225), and a plurality of reagent containers (11) are respectively communicated with branch valve ports of the electric control multi-way valve (1225).
4. A nutritive salt in situ analysis apparatus according to claim 1, characterized in that: the liquid draining piece (13) comprises a numerical control multi-way valve (131), an injector (132) and an injection pump (133), the bottoms of a plurality of reagent containers (11) are respectively communicated with each branch valve port of the numerical control multi-way valve (131), one end of the injector (132) is communicated with a main valve port of the numerical control multi-way valve (131), the injector (132) is arranged on the injection pump (133), one end of the injector (132) away from the numerical control multi-way valve (131) is communicated with the colorimetric part (2), the injector (133) can control the injector (132) to extract quantitative reagent from the corresponding reagent container (11) through the numerical control multi-way valve (131) and inject the reagent into the colorimetric part (2), the injector (132) is connected with a check valve (134), a liquid flow direction in the check valve (134) is from the numerical control multi-way valve (131) to the injector (132), a liquid draining hole (135) is formed in a piston of the injector (132), a pressure valve (136) is fixedly connected in the liquid draining hole (135) of the piston, the pressure valve (136) can be communicated with the colorimetric part (2), and the reagent in the colorimetric part (132) can enter the colorimetric part (2) through the pressure valve (136).
5. A nutritive salt in situ analysis apparatus according to claim 1, characterized in that: the colorimetric part (2) comprises a U-shaped cuvette (21), a light source (22) and a photoelectric detector (23), the U-shaped cuvette (21) comprises a first side pipe (211), a second side pipe (213) and a bottom pipe (212), the two side pipes are respectively connected to two ends of the bottom pipe (212), the two side pipes are communicated with the bottom pipe (212), the first side pipe (211) is communicated with a liquid discharging part (13), the second side pipe (213) is communicated with the sampling part, the light source (22) is arranged at the position close to one end of the bottom pipe (212) in the shell (5), the direction of a light path emitted by the light source (22) is arranged in the shell (5) in the same direction as the axial direction of the bottom pipe (212), the photoelectric detector (23) is arranged at one end close to the position of the bottom pipe (212) away from the light source (22), and the photoelectric detector (23) is used for analyzing the wavelength of a light path penetrating through the bottom pipe (212).
6. The nutritive salt in situ analysis apparatus according to claim 5, wherein: the U-shaped cuvette (21) is obliquely arranged, and a bottom tube (212) of the U-shaped cuvette (21) is obliquely arranged upwards from one end close to the first side tube (211) to one end close to the second side tube (213).
7. The nutritive salt in situ analysis apparatus according to claim 6, wherein: the bottom of the U-shaped cuvette (21) is fixedly connected with a control tube (24), the control tube (24) is arranged in vacuum, the axial direction of the control tube (24) and the axial direction of the bottom tube (212) are mutually parallel, and the length, the width and the tube wall thickness of the control tube (24) are the same as those of the bottom tube (212); the light source (22) comprises a laser (221) and a beam splitter (222), the laser (221) is connected to the shell (5) at a position close to one end of the bottom tube (212), the beam splitter (222) is connected to the laser (221), the beam splitter (222) divides the light paths emitted by the laser (221), one beam of light paths penetrates through the bottom tube (212) along the axis of the bottom tube (212), the other beam of light paths penetrates through the contrast tube (24) along the axis of the contrast tube (24), and both beams of light paths can fall to the photoelectric detector (23);
each light path outlet of the light splitter (222) is connected with an optical fiber (223), one end, far away from the light splitter (222), of each optical fiber (223) is connected with a light shielding sheet (224), and one ends, far away from the light splitter (222), of the two optical fibers (223) are respectively connected with one ends of the bottom tube (212) and the control tube (24).
8. A nutritive salt in situ analysis apparatus according to claim 1, characterized in that: the sampling part comprises an in-situ filter (32), a direct current water pump (31) and a sampling tube (33), wherein the sampling tube (33) penetrates through the shell (5), the in-situ filter (32) is connected to one end of the sampling tube (33), the in-situ filter (32) is connected to the direct current water pump (31), the direct current water pump (31) is communicated with the sampling tube (33) through the in-situ filter (32), an output port of the direct current water pump (31) is connected with a sample feeding tube (34), and the sample feeding tube (34) is communicated with the colorimetric part (2).
9. The nutritive salt in situ analysis apparatus according to claim 8, wherein: a water-proof layer (52) is fixedly connected between the position of the shell (5) corresponding to the sampling part (3) and the colorimetric part (2), the water-proof layer (52) covers the inner peripheral wall of the shell (5), the sample feeding pipe (34) passes through the water-proof layer (52) to be arranged, a sealing ring (35) is fixedly connected at the position of the water-proof layer (52) corresponding to the sample feeding pipe (34), and the inner side of the sealing ring (35) is abutted against the outer peripheral wall of the sample feeding pipe (34); the waterproof protection shell (4) is fixedly connected to the outer side of the shell (5), the waterproof protection shell (4) covers the outer side of the shell (5) and is arranged, a gap is formed between the waterproof protection shell (4) and the shell (5), and the waterproof protection shell is used for arranging circuit wires; the sampling tube (33) passes through the waterproof protection shell (4) to be arranged, the position of the waterproof protection shell (4) corresponding to the sampling tube (33) is plugged, the position of the waterproof protection shell (4) corresponding to the sampling tube (33) is fixedly connected with the flange ring (51), and the flange ring (51) is abutted against the peripheral wall of the sampling tube (33).
10. A nutritive salt in situ analysis apparatus according to claim 1, characterized in that: every all be provided with pressure sensor (6) in reagent container (11), pressure sensor (6) are located reagent container (11) and are close to peristaltic pump (121) position department, casing (5) are connected with control module (7), peristaltic pump (121), changeover member (122) and every pressure sensor (6) all are connected in control module (7) through the circuit, when pressure value and settlement pressure value change take place in reagent container (11), pressure sensor (6) send the signal transmission to control module (7), control module (7) control changeover member (122) make peristaltic pump (121) switch-on with corresponding reagent container (11), adjust the pressure in reagent container (11).
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| CN106556598A (en) * | 2016-11-08 | 2017-04-05 | 厦门斯坦道科学仪器股份有限公司 | For the nutritive salt automatic analysing apparatus in situ of sea water monitoring |
| CN107782724A (en) * | 2017-12-04 | 2018-03-09 | 深圳市朗诚科技股份有限公司 | A kind of nutritive salt in-situ analyzer and nutrient concentrations analysis method |
| CN109030842A (en) * | 2018-08-09 | 2018-12-18 | 中国科学院南海海洋研究所 | A kind of nutrients in sea water in-situ study device |
| CN209821226U (en) * | 2019-05-13 | 2019-12-20 | 中国海洋大学 | Miniature on-spot automatic nutritive salt analysis appearance under water based on improve SIA technique |
| CN111707651A (en) * | 2020-06-22 | 2020-09-25 | 自然资源部第二海洋研究所 | In-situ seawater nutrition enrichment experiment device and application method thereof |
| CN213159499U (en) * | 2020-08-04 | 2021-05-11 | 洛阳大生新能源开发有限公司 | Gas-liquid quick separation device for EC pneumatic conveying pipeline |
| CN214011063U (en) * | 2020-11-24 | 2021-08-20 | 厦门美林特仪器设备有限公司 | Nutritive salt analyzer |
| CN113049307A (en) * | 2021-03-01 | 2021-06-29 | 威海精讯畅通电子科技有限公司 | Water quality on-line analyzer and detection method thereof |
| CN217293011U (en) * | 2021-09-24 | 2022-08-26 | 佛山市顺德区今明塑料机械有限公司 | Blow molding machine for producing degradable plastic storage bag |
| CN114002173A (en) * | 2021-12-03 | 2022-02-01 | 国家海洋技术中心 | Seawater nutrient salt on-line analyzer |
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