CN221124547U - Calibration system of seawater carbon dioxide measuring instrument - Google Patents
Calibration system of seawater carbon dioxide measuring instrument Download PDFInfo
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- CN221124547U CN221124547U CN202323067303.9U CN202323067303U CN221124547U CN 221124547 U CN221124547 U CN 221124547U CN 202323067303 U CN202323067303 U CN 202323067303U CN 221124547 U CN221124547 U CN 221124547U
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 50
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 47
- 239000013535 sea water Substances 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 119
- 238000003860 storage Methods 0.000 claims abstract description 46
- 239000007789 gas Substances 0.000 claims description 56
- 238000007689 inspection Methods 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 5
- 238000004164 analytical calibration Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000012466 permeate Substances 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model belongs to the field of carbon dioxide detectors, in particular to a calibration system of a seawater carbon dioxide measuring instrument, which comprises: the device comprises a water storage container, a temperature controller, a waterway circulation assembly, a balancer assembly, a standard detector and a gas marking assembly; an underwater carbon dioxide measuring instrument is arranged in the water storage container; the circulating loop of the temperature controller passes through the inside of the water storage container so as to keep the temperature in the water storage container; one end of the waterway circulation assembly is connected with the water outlet end of the water storage container, the other end of the waterway circulation assembly is connected with the balancer assembly, and the balancer assembly is connected with the water return end of the water storage container through a water pipe; the balancer assembly is connected with the standard gas assembly and the standard detector respectively to convey the standard gas assembly to the standard detector for calibrating the standard detector and the standard detector. The balancer component is provided with the air path component, so that carbon dioxide gas which can permeate through a waterway well is dried, and then the carbon dioxide gas is introduced into the standard detector, and the calibration system is accurate.
Description
Technical Field
The utility model belongs to the field of carbon dioxide detectors, and particularly relates to a calibration system of a seawater carbon dioxide measuring instrument.
Background
Accurate determination of the partial pressure of carbon dioxide in seawater is critical to reveal the role of the ocean in global climate change. In general, the ways to obtain the partial pressure of carbon dioxide in seawater include two ways: continuous observation of the navigation carbon dioxide and long-term observation of the fixed-point in-situ carbon dioxide sensor. The seawater carbon dioxide sensor based on the permeable membrane technology can acquire a large amount of in-situ data, and is widely applied to global climate change in offshore, oceanic, polar regions and other sea areas and ocean acidification research in coral reef and other sensitive areas. In the long-term use process of the carbon dioxide sensor in the field, the carbon dioxide sensor is inevitably subject to data drift due to the influences of biological contamination, loss of components and parts of the carbon dioxide sensor, and the like, so that the sensor calibration needs to be performed regularly.
Currently, capnometer calibration systems suffer from several problems:
(1) Limited by the measurement principle, compared with other sensors such as seawater dissolved oxygen, the currently available seawater carbon dioxide sensor has larger volume, so that a larger water body environment is needed during calibration;
(2) At present, high-precision table type detection equipment capable of directly measuring the carbon dioxide concentration of a water body is not available, and great difficulty is brought to the reference value measurement of a seawater carbon dioxide calibration test; for example, a CO 2 -pro type underwater carbon dioxide detector of the company oceanus in Canada is internally provided with an infrared CO2 detector, can be used for underwater detection, supports three working modes of laboratory measurement, navigation measurement and anchor submerged buoy, has automatic pressure, temperature and humidity compensation, and has the defects of narrow measurement range, high power consumption and incapability of realizing long-term measurement; however, in the calibration process, the carbon dioxide detector cannot calibrate the standard detector for different gradients of partial pressure values of carbon dioxide for many times, and meanwhile, the carbon dioxide gas extracted from the seawater contains moisture, so that the accuracy of the overall calibration can be influenced;
There are also some carbon dioxide detection devices, which directly use a spray-type water-gas balancer to extract CO2 in a water sample, then introduce the water sample into a standard detector for detection, and simultaneously use a nitrogen-introducing mode for calibration, so that the calibration result of the device is not accurate.
Disclosure of utility model
The utility model aims to provide a seawater carbon dioxide measuring instrument calibration system so as to solve the problem of inaccurate calibration of a carbon dioxide measuring instrument calibration device in the prior art.
The technical scheme adopted by the utility model for achieving the purpose is as follows: a seawater capnometer calibration system, comprising: the device comprises a water storage container, a temperature controller, a waterway circulation assembly, a balancer assembly, a standard detector and a gas marking assembly;
an underwater carbon dioxide measuring instrument is arranged in the water storage container; the circulating loop of the temperature controller passes through the inside of the water storage container so as to keep the temperature in the water storage container;
One end of the waterway circulation assembly is connected with the water outlet end of the water storage container, the other end of the waterway circulation assembly is connected with the balancer assembly, and the balancer assembly is connected with the water return end of the water storage container through a water pipe;
the balancer assembly is connected with the standard gas assembly and the standard detector respectively to convey the standard gas assembly to the standard detector for calibrating the standard detector and the standard detector.
The air marking assembly comprises: a multi-way valve, a gas flow controller, and a three-way valve;
Multiple groups of standard gases are connected in parallel into corresponding valves of the multi-way valves, and the multi-way valves are connected with the three-way valves through gas paths;
The gas flow controller is arranged on a gas path between the multi-way valve and the three-way valve to control the gas flow to enter the three-way valve;
The other two output ends of the three-way valve are respectively connected with the standard detector and the balancer component through pipelines.
The balancer assembly comprises a balancer, a balancing film, an air chamber, a waterway overcurrent device, an air passage inspection device and an air passage assembly which are arranged on the balancer;
the balance film is arranged in the balancer; an air chamber is arranged behind the balance film;
The water path flow device or the air path inspection device is arranged on the balance film and positioned outside the balancer, the water path flow device is connected with the water path circulation assembly, and the air path inspection device is connected with the three-way valve;
The air chamber is connected with the standard detector through the air path component.
The gas circuit subassembly includes: the device comprises a condenser, an air pump, a two-way four-way valve, a barometer, a cross four-way valve and a gas drying pipe connected with a standard detector;
The input end of the condenser is connected with the air chamber, the output end of the condenser is connected with the first port of the two-way four-way valve through the air pump, so that air in the air chamber is pumped out through the air pump and is conveyed to the two-way four-way valve through the condenser;
The second port of the two-way four-way valve is used for connecting the gas pumped by the air pump with the standard detector through the barometer, the cross four-way valve and the gas drying pipe in sequence;
the third port of the two-way four-way valve is used as an input end to be connected with a three-way valve of the air marking assembly;
The fourth port of the two-way four-way valve is used as an output end to be connected with the input end of the three-way valve and is discharged to the atmosphere through an exhaust pipeline on the output end of the three-way valve.
The balancer is provided with a shell outside, the front end of the shell is provided with a round balancing film cavity, the shell is internally provided with a mounting chamber, and the balancing film is vertically fixed in the balancing film cavity;
The water path flow-through device or the air path inspection device is fixedly arranged on the balance film cavity through bolts, the air pump, the two-way four-way valve, the barometer, the cross four-way valve and the air drying pipe are all fixed in the installation chamber, and the condenser is fixedly arranged outside the balancer.
The standard detector extends out of a pipeline and is connected with a cross four-way valve of the gas circuit assembly, one output end of the cross four-way valve is connected with a three-way reversing valve through a pipeline, and two outlets of the three-way reversing valve are respectively connected into the balance membrane cavity and the exhaust pipeline.
The number of valves at the input end of the multi-way valve is equal to the number of standard gases input into different carbon dioxide partial pressure gradients.
The water storage container is a water bucket, and the outer wall of the water bucket is wrapped by the heat preservation layer so as to reduce the exchange with the external temperature;
the water storage container is internally provided with configured water and is communicated with an acid-base injection device so as to prepare the water in the water storage container into calibration water; the water storage container is connected with the waterway circulation assembly.
The waterway circulation assembly includes: the water path diverter, the flow controller, the input pipeline and the output pipeline;
The input pipeline and the output pipeline are respectively connected to the input end and the output end of the water storage container, form a circulating pipeline, and are divided at intervals through a waterway divider; the waterway diverter is connected with the waterway flow device through the flow controller.
The waterway overflow device comprises 1 water inlet pipe and 2 water outlet pipes;
The output end of the water storage container is connected with the water inlet pipe through the waterway diverter and the flow controller in sequence; one of the water outlet pipes of the waterway overflow device is connected with the condenser, and the other water outlet pipe is connected with the input end of the water storage container through the input pipeline of the waterway circulation assembly.
The utility model has the following beneficial effects and advantages:
According to the utility model, by means of connecting multiple groups of standard gases with the multi-way valve in parallel and then connecting the multi-way valve with the three-way valve, the standard detector is calibrated multiple times by utilizing the multiple groups of standard gases which contain different partial pressure gradients of carbon dioxide, and the balancer component is calibrated by the standard detector after inspection, so that each component and part in the whole system are ensured to be accurate before calibration. And the gas path component is designed in the balancer component, so that carbon dioxide gas which can permeate through a waterway well is dried, and then the carbon dioxide gas is introduced into the standard detector, and the calibration system is accurate.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of a balancer assembly of the present utility model;
FIG. 3 is a schematic front view of a balancer assembly of the present utility model;
In the figure: 1 is a shell, 2 is a balance membrane cavity, and 3 is a waterway overflow device.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, which is a schematic structural diagram of the present utility model, a calibration system for a seawater carbon dioxide measuring instrument of the present utility model includes: the device comprises a water storage container, a temperature controller for controlling the water storage container at constant temperature, a waterway circulation assembly, a balancer assembly, a standard detector and a standard gas assembly, wherein an underwater carbon dioxide measuring instrument is arranged in the water storage container; the water storage container is used for simulating the seawater water environment, and the carbon dioxide measuring instrument to be calibrated is arranged in the water storage container;
One end of the waterway circulation assembly is connected with the water outlet end of the water storage container, the other end of the waterway circulation assembly is connected with the balancer assembly, and the balancer assembly is connected with the water return end of the water storage container through a water pipe.
Waterway circulation assembly, comprising: the water path diverter, the flow controller, the input pipeline and the output pipeline;
The input pipeline and the output pipeline are respectively connected to the input end and the output end of the water storage container, form a circulating pipeline, and are divided at intervals through the waterway divider; the waterway diverter is connected with the waterway flow device through the flow controller.
The standard gas assembly comprises a plurality of groups of standard gases, a multi-way valve and a three-way valve, wherein the plurality of groups of standard gases are connected with the multi-way valve in a parallel mode, in the embodiment, the standard gases are divided into five groups, the air pressure of each group of standard gases is 1Bar, the five groups of different standard gases are different in partial pressure value of carbon dioxide in the standard gases, the multi-way valve is provided with 5 input ports and is connected with the three-way valve through an air circuit, the air circuit is provided with a gas flow controller, and the other two ends of the three-way valve are respectively connected with the standard detector and the balancer assembly through pipelines;
The balancer assembly comprises a balancer, a balancing film positioned in the balancer, an air chamber positioned behind the balancing film, a waterway overcurrent device 2, an air passage inspection device and an air passage assembly,
The water passage flow device 2 is manufactured by the following manufacturers: german 4H-JENAENGINEERING; the model is as follows: CONTROS HydroC TMCO2 FT waterway overflow device;
The gas circuit inspection device selects the manufacturer as: LI-COR in the United states; the model is as follows: LI-7815 gas circuit inspection device;
The water path flow device or the water path flow device 2 is arranged outside the balance film, the water path flow device or the water path flow device 2 is arranged at the same position in a replacement mode according to calibration of different systems, the water path flow device 2 is connected with the water path circulation assembly, the air path inspection device is connected with the three-way valve, and the air chamber is connected with the standard detector through the air path assembly.
In this embodiment, the water path flow device 2 includes 1 water inlet pipe and 2 water outlet pipes;
The output end of the water storage container is connected with the water inlet pipe through the waterway diverter and the flow controller in sequence; one of the water outlet pipes of the waterway overflow device is connected with the condenser, and the other water outlet pipe is connected with the input end of the water storage container through the input pipeline of the waterway circulation assembly.
The air circuit component comprises a condenser, an air pump, a two-way four-way valve, an air pressure gauge, a cross four-way valve and an air drying pipe connected with the standard detector,
One end of the condenser is connected with the air chamber, the other end of the condenser is connected with the air pump, air in the air chamber is pumped out through the air pump, passes through the condenser and then is communicated with one port of the two-way four-way valve, a second port of the two-way four-way valve is sequentially connected with the barometer, the cross four-way valve and the air drying pipe in series, and a third port of the two-way four-way valve is connected into an exhaust pipeline through a fourth port of the two-way four-way valve and the three-way valve.
As shown in fig. 2 and 3, the balancer comprises a casing 1, a circular balance film cavity 2 is arranged at the front end of the casing 1, an installation chamber is arranged in the casing 1, the balance film is vertically fixed in the balance film cavity 2, a water path flow-through device 3 or an air path inspection device is fixed on the balance film cavity 2 through bolts, an air pump, a two-way four-way valve, a barometer, a cross four-way valve and an air drying pipe are all fixed in the installation chamber, and a condenser is positioned outside the balancer.
The standard detector extends out of a pipeline and is connected with a cross four-way valve, the cross four-way valve is connected with a three-way reversing valve through a pipeline, and two outlets of the three-way reversing valve are respectively connected with a balance film and an exhaust pipeline. And the exhaust pipeline is also provided with a three-way valve which is also connected with the two-way four-way valve.
The water storage container is preferably a bucket, and is wrapped by the heat preservation layer, so that the exchange with the outside temperature is reduced. The inside is provided with the configured experimental water for calibration, and the outside is connected with the waterway system.
The temperature controller flows a temperature control waterway in the temperature controller through the inside of the water bucket, so that the temperature controller can accurately and stably control the temperature of experimental water in the water bucket.
The working principle of the utility model is as follows:
With reference to fig. 1, the standard detector is calibrated by passing five groups of different carbon dioxide partial pressure gradient standard gases through the multi-way valve, then passing through the three-way valve, enabling the gases to enter the two-way four-way valve in the balancer component, connecting the second port and the third port of the two-way four-way valve, then entering the barometer, then entering the cross four-way valve and the gas drying pipe, and finally entering the standard detector. After the step is finished, calibrating the balancer assembly, when calibrating the standard detector and the balancer assembly, the water flow is in a closed state, the gas circuit inspection device is fixed at the front end of the balancing film to replace the position of the water circuit flow-through device 3, five groups of different carbon dioxide partial pressure gradient standard gases pass through the multi-way valve and then enter the balancer inspection device through the three-way valve, the gas sequentially enters the condenser and the air pump through the balancing film, the first port and the second port of the two-way four-way valve are communicated, and then enter the barometer, the cross four-way valve and the gas drying pipe to finally enter the standard detector for calibrating the balancer assembly.
And after the calibration of the standard detector and the balancer assembly is finished, calibrating the underwater carbon dioxide measuring instrument. Removing the air passage inspection device from the balance membrane, and then installing the water passage overflow device 3 on a balance membrane cavity in the balancer assembly; opening a waterway, leading water in the water storage container to a water channel flow device 3 through a waterway assembly, and enabling water to flow back into the water storage container under the action of a balance membrane at the moment; carbon dioxide in the water permeates the balance membrane, enters the air chamber, opens the balance air path, enables the carbon dioxide in the water storage container to enter the standard detector, and records data.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A seawater capnometer calibration system, comprising: the device comprises a water storage container, a temperature controller, a waterway circulation assembly, a balancer assembly, a standard detector and a gas marking assembly;
an underwater carbon dioxide measuring instrument is arranged in the water storage container; the circulating loop of the temperature controller passes through the inside of the water storage container so as to keep the temperature in the water storage container;
One end of the waterway circulation assembly is connected with the water outlet end of the water storage container, the other end of the waterway circulation assembly is connected with the balancer assembly, and the balancer assembly is connected with the water return end of the water storage container through a water pipe;
the balancer assembly is connected with the standard gas assembly and the standard detector respectively to convey the standard gas assembly to the standard detector for calibrating the standard detector and the standard detector.
2. The seawater capnometer calibration system of claim 1, wherein the gas standard assembly comprises: a multi-way valve, a gas flow controller, and a three-way valve;
Multiple groups of standard gases are connected in parallel into corresponding valves of the multi-way valves, and the multi-way valves are connected with the three-way valves through gas paths;
The gas flow controller is arranged on a gas path between the multi-way valve and the three-way valve to control the gas flow to enter the three-way valve;
The other two output ends of the three-way valve are respectively connected with the standard detector and the balancer component through pipelines.
3. The seawater carbon dioxide measuring instrument calibration system of claim 1, wherein the balancer assembly comprises a balancer, and a balancing film, an air chamber, a water passage flow device, an air passage inspection device and an air passage assembly which are arranged on the balancer;
the balance film is arranged in the balancer; an air chamber is arranged behind the balance film;
The water path flow device or the air path inspection device is arranged on the balance film and positioned outside the balancer, the water path flow device is connected with the water path circulation assembly, and the air path inspection device is connected with the three-way valve;
The air chamber is connected with the standard detector through the air path component.
4. A seawater capnometer calibration system as recited in claim 3, wherein the gas circuit assembly comprises: the device comprises a condenser, an air pump, a two-way four-way valve, a barometer, a cross four-way valve and a gas drying pipe connected with a standard detector;
The input end of the condenser is connected with the air chamber, the output end of the condenser is connected with the first port of the two-way four-way valve through the air pump, so that air in the air chamber is pumped out through the air pump and is conveyed to the two-way four-way valve through the condenser;
The second port of the two-way four-way valve is used for connecting the gas pumped by the air pump with the standard detector through the barometer, the cross four-way valve and the gas drying pipe in sequence;
the third port of the two-way four-way valve is used as an input end to be connected with a three-way valve of the air marking assembly;
The fourth port of the two-way four-way valve is used as an output end to be connected with the input end of the three-way valve and is discharged to the atmosphere through an exhaust pipeline on the output end of the three-way valve.
5. A seawater carbon dioxide measuring instrument calibration system according to claim 3, wherein a housing is arranged outside the balancer, a circular balance membrane cavity is arranged at the front end of the housing, a mounting chamber is arranged in the housing, and the balance membrane is vertically fixed in the balance membrane cavity;
The water path flow-through device or the air path inspection device is fixedly arranged on the balance film cavity through bolts, the air pump, the two-way four-way valve, the barometer, the cross four-way valve and the air drying pipe are all fixed in the installation chamber, and the condenser is fixedly arranged outside the balancer.
6. The calibration system of the seawater carbon dioxide measuring instrument according to claim 1, wherein the standard detector extends out of a pipeline and is connected with a cross four-way valve of the gas circuit assembly, one output end of the cross four-way valve is connected with a three-way reversing valve through a pipeline, and two outlets of the three-way reversing valve are respectively connected into the balance film cavity and the exhaust pipeline.
7. A seawater capnometer calibration system as claimed in claim 2, wherein the number of valves at the input of the multiport valve is equal to the number of standard gases for inputting different partial pressure gradients of carbon dioxide.
8. The calibration system of a seawater carbon dioxide measuring instrument according to claim 1, wherein the water storage container is a water bucket, and the outer wall of the water bucket is wrapped by an insulating layer to reduce exchange with external temperature;
the water storage container is internally provided with configured water and is communicated with an acid-base injection device so as to prepare the water in the water storage container into calibration water; the water storage container is connected with the waterway circulation assembly.
9. A seawater capnometer calibration system as claimed in claim 1 or 8, wherein the waterway circulation assembly comprises: the water path diverter, the flow controller, the input pipeline and the output pipeline; the input pipeline and the output pipeline are respectively connected to the input end and the output end of the water storage container, form a circulating pipeline, and are divided at intervals through a waterway divider; the waterway diverter is connected with the waterway flow device through the flow controller.
10. A seawater capnometer calibration system as claimed in claim 3, wherein the waterway flow device comprises 1 water inlet pipe and 2 water outlet pipes;
The output end of the water storage container is connected with the water inlet pipe through the waterway diverter and the flow controller in sequence; one of the water outlet pipes of the waterway overflow device is connected with the condenser, and the other water outlet pipe is connected with the input end of the water storage container through the input pipeline of the waterway circulation assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323067303.9U CN221124547U (en) | 2023-11-14 | 2023-11-14 | Calibration system of seawater carbon dioxide measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323067303.9U CN221124547U (en) | 2023-11-14 | 2023-11-14 | Calibration system of seawater carbon dioxide measuring instrument |
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| Publication Number | Publication Date |
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| CN221124547U true CN221124547U (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323067303.9U Active CN221124547U (en) | 2023-11-14 | 2023-11-14 | Calibration system of seawater carbon dioxide measuring instrument |
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| Country | Link |
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| CN (1) | CN221124547U (en) |
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2023
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