CN210465463U - Automatic sampling system for greenhouse gas - Google Patents
Automatic sampling system for greenhouse gas Download PDFInfo
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- CN210465463U CN210465463U CN201920948856.XU CN201920948856U CN210465463U CN 210465463 U CN210465463 U CN 210465463U CN 201920948856 U CN201920948856 U CN 201920948856U CN 210465463 U CN210465463 U CN 210465463U
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Abstract
The utility model relates to a greenhouse gas automatic sampling system, which comprises a control device, a relay, an input device, a solenoid valve, a gas sampling device, a gas washing device, a quick connection port, a plurality of groups of culture devices and a power supply; the culture device, the gas sample introduction device and the external detector are connected through non-detachable connection during the whole process of multiple sample introduction detection, so that the high air tightness of the culture device is kept in the multiple sample introduction detection process, and a water-proof and drying device is designed to ensure the dryness; in addition, a plurality of synchronous expansion ports are designed, and electric equipment is added according to experimental requirements, so that the high-expansibility is realized; automatic sample introduction is realized by controlling a plurality of groups of culture devices in a laboratory, and a gas washing electromagnetic valve is controlled by a NAND gate system protection program to prevent the risk of blocking an external detector, so that the external detector is protected; the whole system can realize in-situ, batch, real-time and accurate automatic greenhouse gas sample introduction in a laboratory, and greatly reduces the workload of experimenters.
Description
Technical Field
The utility model belongs to the technical field of environmental monitoring, especially, relate to greenhouse gas autoinjection system.
Background
With the rapid development of modern greenhouse gas analyzers, various methods for detecting and sampling greenhouse gases, such as a direct injector sampling method, a quantitative tube sampling method, a headspace sampling method, a thermal desorption sampling method, purging and trapping, solid phase extraction and the like, have made great progress. The analysis result is obviously influenced by different sample introduction modes or methods, and researches show that the automatic sample introduction has high automation degree and good continuity, and the correlation coefficient of a standard curve is more ideal than that of a manual sample introduction detection result, so that the automatic sample injector is widely used for gas phase analysis. However, no in-situ gas-phase autosampler for greenhouse gas laboratory culture applied to the analysis field is provided at home. The automatic sample introduction difficulty is high mainly because of the requirement of high frequency, in-situ, real-time and multi-group sample introduction in a laboratory; the sample gas has high requirements on dryness and air tightness, so that the application range of the sample gas is limited, and the attention to the in-situ sample injection device for greenhouse gas laboratory culture is particularly important.
At present, gas chromatography and spectroscopy are basically adopted in China to measure greenhouse gases, and the sampling method mainly comprises air bag and needle cylinder sampling → manual sampling method according to the sampling mode. The air bag is complicated to sample, the process is complex, the air bag needs to be vacuumized before sampling, and cross contamination is easily caused in the sampling process. The manual sampling method is simple in sampling and analysis and wide in application, but the manual analysis repeatability is poor, the analysis efficiency is low, and the working intensity of detection personnel is high. The multifunctional automatic sample injector is increasingly widely applied to an environment monitoring system, has various sample injection functions of liquid sample injection, headspace gas sample injection, micro-extraction sample injection and the like, and realizes in-situ automatic continuous sample injection for laboratory culture by adopting the automatic sample injector. Meanwhile, the electronic gas circuit is used for controlling the peripheral expansion system to synchronously control the peripheral expansion system, and when the sample is automatically fed in situ, the peripheral expansion system can synchronously control the synchronous control of other external monitoring indexes required by the experiment, so that the expansibility and compatibility of the device are greatly improved. The system is simple and rapid to operate, and the sample feeding consistency is guaranteed to the maximum extent, so that the accuracy of an analysis result is guaranteed. The use of the gas autosampler is of great significance to reduce the working strength and improve the working efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the problem to prior art exists provides a greenhouse gas autoinjection device.
The utility model provides a technical scheme of above-mentioned problem does:
an automatic greenhouse gas sampling system, comprising: the system comprises a control device, a relay, an input device, an electromagnetic valve, a gas sampling device, a gas washing device, a quick connection port, a plurality of groups of culture devices and a power supply;
the control device is used for system control;
the relay is connected with the control device and the electromagnetic valve and controls the electromagnetic valve to be opened and closed;
the input device is connected with the control device and used for inputting user-defined parameters, including the sample introduction sequence, the detection time length, the sampling period and the gas washing time of a plurality of groups of culture devices;
the gas sampling device comprises an external detector, an air inlet pipeline, an air outlet pipeline, a first air inlet electromagnetic valve and a first air outlet electromagnetic valve; one end of the air inlet pipeline is connected with the external detector, and the other end of the air inlet pipeline is connected with a first quick connector of the quick connection port through a first air inlet electromagnetic valve; one end of the air outlet pipeline is connected with the external detector, and the other end of the air outlet pipeline is connected with a second quick connector of the quick connection port through a first air outlet electromagnetic valve;
the gas washing device comprises a gas washing bottle, an air inlet pipeline, an air outlet pipeline, a second air inlet electromagnetic valve and a second air outlet electromagnetic valve; the air inlet of the gas washing bottle is connected with an air inlet pipeline through a second air inlet electromagnetic valve; the gas outlet of the gas washing bottle is connected with a gas outlet pipeline through a second gas outlet electromagnetic valve;
the quick connection port comprises a culture device interface, a first quick connector and a second quick connector, wherein the first quick connector and the second quick connector are arranged on the culture device interface; the culture device interface is connected with a culture device;
the air inlet pipeline is provided with a water isolating device and a drying device for isolating water and drying;
the power supply is used for supplying power to the electric device
As a further improvement of the utility model, the water proof device is the hose filter valve, two sections gaseous phase pipes are connected to the hose filter valve, fixed water proof filtration membrane in the middle of the hose filter valve. The water barrier prevents water from entering the external detector.
As a further improvement of the utility model, the drying device is a circulating water cooling bag; the circulating water-cooling bag is wrapped at the position, close to the quick connector, of the air inlet pipeline, and is provided with a water inlet pipe and a water outlet pipe for circulating inlet and outlet of cold water. The water circulation in the circulation water cooling bag cools the gas moisture in the wrapped gas inlet pipe, and the water is cooled and condensed into water drops on the wall of the gas inlet pipe to enter the original culture system along the gas inlet pipe, so that the drying gas is dried in a non-contact manner by the sample, and the absorption of the drying agent on the gas component to be detected can be avoided.
As a further improvement of the utility model, the air inlet pipeline and the air outlet pipeline are formed by connecting a plurality of 1/8-caliber metal or polytetrafluoroethylene plastic gas phase pipes.
As a further improvement of the utility model, the utility model also comprises an air inlet main pipeline and an air outlet main pipeline; one end of the air inlet main pipeline and one end of the air outlet main pipeline are connected with the external detectors, and the other ends of the air inlet main pipeline and the air outlet main pipeline are respectively connected with a plurality of groups of air inlet pipelines and a plurality of groups of air outlet pipelines through air exhaust; the water isolating device is arranged on the air inlet main pipeline, and the drying devices are respectively arranged on the air inlet pipelines.
As a further improvement, the utility model also comprises a system protection module, the system protection module is connected the second and is admitted air solenoid valve and the second solenoid valve of giving vent to anger, and control gas washing device opens and stops, when all pipelines of gaseous sampling device were all closed, opens gas washing device's pipeline. The system protection module can control the gas washing device, and can protect the sampling system and the detection device from blocking.
As a further improvement of the utility model, the system also comprises a synchronous control peripheral expansion port; the synchronous control peripheral expansion port is connected with the control device, a plurality of groups of wiring ports which are opened/closed simultaneously and reversely opened/closed simultaneously are arranged on the synchronous control peripheral expansion port, and each group of wiring ports are respectively connected with a normally open terminal and a normally closed terminal of the relay. Furthermore, the system also comprises an additional electric device, and a power cord of the additional electric device is connected to the opening/closing wiring port or the reverse opening/closing wiring port of the synchronous control peripheral expansion port. The expansion port can be expanded to be an automatic sampling device, and the electric device can be independently controlled according to experiment requirements to realize the automatic sampling function. Or can be expanded to other devices, such as adding a fan and a water pumping device, if the fan and the water pumping device in the culture device need to be controlled simultaneously while controlling the air inlet sample, the power lines of the fan and the water pumping device are respectively connected to two groups of wiring ports which are synchronously controlled to be opened/closed simultaneously in the peripheral expansion ports, so that the sample inlet and the fan and the water pumping device can be opened simultaneously; if the air is not introduced, the fan and the water pumping device are started, power lines of the fan and the water pumping device are respectively connected to two groups of wiring ports which are simultaneously and reversely opened/closed in the synchronous control peripheral expansion port, and the sample introduction and the reverse opening of the fan and the water pumping device can be realized.
As a further improvement of the utility model, the device also comprises a self-checking device, and a vacuum pressure gauge and an alarm device are arranged in the self-checking device; the vacuum pressure gauge is connected with the gas exhaust and used for detecting the pressure in the gas exhaust; and the alarm device carries out fault prompt according to the detection result of the vacuum pressure gauge.
As a further improvement of the utility model, the utility model also comprises a heat dissipation device for heat dissipation of the heating element; the heat dissipation device comprises a heat dissipation fan, and the heat dissipation fan is arranged at the electromagnetic valve.
As a further improvement of the utility model, the hardware device in the system is fixed by an aluminum case.
In the utility model, the air/nitrogen is introduced into the gas washing device; and nitrogen is introduced into the experiment needing to be connected with pure nitrogen for pipeline cleaning, and air is introduced into the experiment for other experiments, so that the nitrogen consumption is reduced, and the cost is saved.
The system of the utility model connects the culture device, the gas sampling device and the external detector through non-detachable connection during the whole process of multiple sampling detection, thereby realizing the high air tightness of the culture device in the multiple sampling detection process and designing a water-proof and drying device to ensure the dryness; in addition, a plurality of synchronous expansion ports are designed, and electric equipment is added according to experimental requirements, so that the high-expansibility is realized; automatic sample introduction is realized by controlling a plurality of groups of culture devices in a laboratory, and a gas washing electromagnetic valve is controlled by a NAND gate system protection program to prevent the risk of blocking an external detector, so that the external detector is protected; the whole system can realize in-situ, batch, real-time and accurate automatic greenhouse gas sample introduction in a laboratory, reduce the error of an experiment system, realize unattended multi-batch and long-term detection, and greatly reduce the workload of experimenters.
Drawings
Fig. 1 is a schematic structural diagram of a system according to embodiment 1.
In the figure: 1. a control device; 2. a relay; 3. an input device; 4. an external detector; 5. a culture device; 6. a quick connect port; 7. a gas washing bottle; 8. a main intake pipe; 81. an air intake line; 82. a drying device; 83. a first air intake solenoid valve; 84. a water isolation device; 85 parts by weight; a second air intake solenoid valve; 9. a main gas outlet pipeline; 91. an air outlet pipeline; 92. a first air outlet electromagnetic valve; 93. a second air outlet electromagnetic valve; 10. air exhaust; 11. synchronously controlling an external expansion port; 111. simultaneously opening/closing the wiring ports; 112. meanwhile, the wiring port is reversely opened/closed; 12. a system protection module; 13. a power source; 14. a UPS power supply; 15. a heat sink; 16. a self-checking device.
Detailed Description
Example 1
This embodiment specifically illustrates the system structure of the present invention.
The greenhouse gas sampling system shown in fig. 1 comprises a control device 1, a relay 2, an input device 3, an electromagnetic valve, a gas sampling device, a gas washing device, a quick connection port 6, a plurality of groups of culture devices 5 and a power supply 13; the control device 1 is a single chip microcomputer, and the input device 3 is a touch type digital display screen.
The relay 2 is connected with the control device 1 and the electromagnetic valve to control the opening and closing of the electromagnetic valve.
The input device 3 is connected with the control device 1 and used for inputting user-defined parameters, including the sample introduction sequence, the detection time length, the sampling period and the gas washing time of a plurality of groups of culture devices.
The gas sampling device comprises an external detector 4, an air inlet pipeline 81, an air outlet pipeline 91, a first air inlet electromagnetic valve 83 and a first air outlet electromagnetic valve 92; one end of the air inlet pipeline 81 is connected with the external detector 4, and the other end of the air inlet pipeline is connected with a first quick connector of the quick connection port 6 through a first air inlet electromagnetic valve 82; one end of the air outlet pipeline 91 is connected with the external detector 4, and the other end of the air outlet pipeline is connected with a second quick connector of the quick connection port 6 through a first air outlet electromagnetic valve 92; the gas washing device comprises a gas washing bottle 7, an air inlet pipeline 81, an air outlet pipeline 91, a second air inlet electromagnetic valve 85 and a second air outlet electromagnetic valve 93; the air inlet of the gas washing bottle 7 is connected with an air inlet pipeline 81 through a second air inlet electromagnetic valve 85; the gas outlet of the gas washing bottle 7 is connected with a gas outlet pipeline 91 through a second gas outlet electromagnetic valve 93.
The quick connection port 6 comprises a culture device interface, a first quick connector and a second quick connector which are arranged on the culture device interface; the culture device interface is connected with a culture device 7.
The air inlet pipeline 81 and the air outlet pipeline 91 are formed by connecting a plurality of 1/8-caliber metal or polytetrafluoroethylene plastic gas phase pipes. The air inlet pipeline 81 and the air outlet pipeline 91 are converged into the air inlet main pipeline 8 and the air outlet main pipeline 9 through the air exhaust 10. The air inlet main pipeline 8 is provided with a water blocking device 84, and the joint of the air inlet pipeline 81 and the first quick connector is provided with a drying device 82. The water stop device 84 is a hose filter valve, the hose filter valve is connected with two sections of gas phase pipes, and a waterproof filter membrane is fixed in the middle of the hose filter valve. The drying device 82 is a circulating water cooling bag; the circulating water-cooling bag is wrapped at the position, close to the first quick connector, of the air inlet pipeline, and is provided with a water inlet pipe and a water outlet pipe for circulating inlet and outlet of cold water.
The gas washing device is controlled based on the system protection module 12, the system protection module 12 is connected with the second gas inlet electromagnetic valve 85 and the second gas outlet electromagnetic valve 93, the gas washing device is controlled to be started and stopped, and when all pipelines of the gas sampling device are closed, the circulating pipeline of the gas washing device is opened, so that the external detector 4 and the sampling device are protected, and blocking is prevented.
In this embodiment, a synchronous control peripheral expansion port 11 is further provided; the synchronous control peripheral expansion port 11 is connected with the control device 1, a plurality of groups of wiring ports 111 and 112 which are opened/closed at the same time and opened/closed reversely at the same time are arranged on the synchronous control peripheral expansion port 11, and each group of wiring ports are respectively connected with a normally open terminal and a normally closed terminal of the relay. When the additional electric device is arranged, a power line of the additional electric device is connected to an opening/closing wiring port or a reverse opening/closing wiring port of the synchronous control peripheral expansion port, so that synchronous/reverse synchronous opening/closing of the additional electric device and the sample injection device is realized.
The power supply 13 is a 5V power supply, is connected with a 220V UPS power supply 14 for protection, and is used for converting 220V into a suitable voltage of a 5V element.
The system of the embodiment is also provided with a heat dissipation device 15 for dissipating heat of the heating element; the heat sink 15 includes a heat dissipation fan disposed at the solenoid valve.
The system of the embodiment is also provided with a self-checking device 16, and a vacuum pressure gauge and an alarm device are arranged in the self-checking device 16; the vacuum pressure gauge is connected with the inlet/outlet of the gas exhaust 10 to detect the pressure in the gas exhaust, and when the monitoring pressure of the gas exhaust 10 connected with the inlet end of the external detector 4 is negative pressure and the monitoring pressure of the gas exhaust 10 connected with the outlet end of the external detector 4 is positive pressure, the system is normal; if the monitoring pressure of the gas exhaust 10 connected with the inlet end of the external detector 4 is negative pressure and the monitoring pressure of the gas exhaust 10 connected with the outlet end of the external detector 4 is positive pressure, the system is abnormal, and the alarm device gives an alarm; the alarm device can be an alarm lamp or an alarm bell, and the like, and the self-checking device 16 is started for self-checking after the system input parameter setting is completed, and fault troubleshooting is carried out if the alarm lamp is turned on or the alarm bell is sounded until the self-checking is passed.
All the hardware equipment are installed and fixed in an aluminum manufacturing machine box, a control device 1 (a single chip microcomputer) and a relay 2 are fixed on a left side wall plate of the machine box, an input device touch type digital display screen is installed on the left side wall plate, an electromagnetic valve module is installed at the top of the machine box, a heat dissipation module is installed at the tail of the machine box, a power supply module is installed at the bottom of the machine box,
all the hardware equipment is installed and fixed in an aluminum manufacturing machine box, a control device 1 (a single chip microcomputer) and a relay 2 are fixed on a left side wall plate of the machine box, an input device 3 (a touch digital display screen) is installed on the left side wall plate, an electromagnetic valve is installed at the top of the machine box, a heat dissipation device 15 is installed at the tail of the machine box, and a power supply 13 is installed at the bottom of the machine box.
In this embodiment, the system shown in the figure has the following automatic sample injection process:
(1) setting the pipeline sample introduction sequence of the gas sample introduction device, the sample introduction starting time, the sample introduction detection time and the sample introduction pipeline closing time of each group of pipelines; when all pipelines arranged on the gas sampling device are closed, the pipeline of the gas washing device is opened, and air/nitrogen is introduced into the gas washing device;
(2) after a culture system is put into a plurality of groups of culture devices, the quick connection ports are quickly and sequentially connected;
(3) starting the system and starting automatic sample introduction.
Claims (9)
1. An automatic greenhouse gas sampling system is characterized by comprising: the system comprises a control device, a relay, an input device, an electromagnetic valve, a gas sampling device, a gas washing device, a quick connection port, a plurality of groups of culture devices and a power supply;
the control device is used for system control;
the relay is connected with the control device and the electromagnetic valve and controls the electromagnetic valve to be opened and closed;
the input device is connected with the control device and used for inputting user-defined parameters, including the sample introduction sequence, the detection time length, the sampling period and the gas washing time of a plurality of groups of culture devices;
the gas sampling device comprises an external detector, an air inlet pipeline, an air outlet pipeline, a first air inlet electromagnetic valve and a first air outlet electromagnetic valve; one end of the air inlet pipeline is connected with the external detector, and the other end of the air inlet pipeline is connected with a first quick connector of the quick connection port through a first air inlet electromagnetic valve; one end of the air outlet pipeline is connected with the external detector, and the other end of the air outlet pipeline is connected with a second quick connector of the quick connection port through a first air outlet electromagnetic valve;
the gas washing device comprises a gas washing bottle, an air inlet pipeline, an air outlet pipeline, a second air inlet electromagnetic valve and a second air outlet electromagnetic valve; the air inlet of the gas washing bottle is connected with an air inlet pipeline through a second air inlet electromagnetic valve; the gas outlet of the gas washing bottle is connected with a gas outlet pipeline through a second gas outlet electromagnetic valve;
the quick connection port comprises a culture device interface, a first quick connector and a second quick connector, wherein the first quick connector and the second quick connector are arranged on the culture device interface; the culture device interface is connected with a culture device;
the air inlet pipeline is provided with a water isolating device and a drying device for isolating water and drying;
the power supply is used for supplying power to the electric device.
2. The automatic greenhouse gas sampling system according to claim 1, wherein the water-stop device is a hose filter valve, the hose filter valve is connected with the two sections of gas phase pipes, and a waterproof filter membrane is fixed in the middle of the hose filter valve.
3. The automatic greenhouse gas sampling system according to claim 1, wherein the drying device is a circulating water cooling bag; the circulating water-cooling bag is wrapped at the position, close to the quick connector, of the air inlet pipeline, and is provided with a water inlet pipe and a water outlet pipe for circulating inlet and outlet of cold water.
4. The automatic greenhouse gas sample injection system as claimed in claim 1, wherein the gas inlet pipeline and the gas outlet pipeline are formed by connecting a plurality of 1/8-caliber metal or polytetrafluoroethylene plastic gas phase pipes.
5. The automatic greenhouse gas sampling system according to claim 1, further comprising a gas inlet main pipeline and a gas outlet main pipeline; one end of the air inlet main pipeline and one end of the air outlet main pipeline are connected with the external detectors, and the other ends of the air inlet main pipeline and the air outlet main pipeline are respectively connected with a plurality of groups of air inlet pipelines and a plurality of groups of air outlet pipelines through air exhaust; the water isolating device is arranged on the air inlet main pipeline, and the drying devices are respectively arranged on the air inlet pipelines.
6. The automatic greenhouse gas sampling system according to claim 1, further comprising a system protection module, wherein the system protection module is connected with the second gas inlet solenoid valve and the second gas outlet solenoid valve, controls the gas washing device to be started and stopped, and opens a circulation pipeline of the gas washing device when all pipelines of the gas sampling device are closed.
7. The greenhouse gas automatic sampling system according to claim 1, further comprising a synchronous control peripheral expansion port; the synchronous control peripheral expansion port is connected with the control device, a plurality of groups of wiring ports which are opened/closed simultaneously and reversely opened/closed simultaneously are arranged on the synchronous control peripheral expansion port, and each group of wiring ports are respectively connected with a normally open terminal and a normally closed terminal of the relay.
8. The greenhouse gas automatic sampling system according to claim 7, further comprising an additional electric device, wherein a power cord of the additional electric device is connected to an opening/closing wiring port or a reverse opening/closing wiring port of the synchronous control peripheral expansion port.
9. The automatic greenhouse gas sample introduction system according to claim 5, further comprising a self-inspection device, wherein a vacuum pressure gauge and an alarm device are arranged in the self-inspection device; the vacuum pressure gauge is connected with the gas exhaust and used for detecting the pressure in the gas exhaust; and the alarm device carries out fault prompt according to the detection result of the vacuum pressure gauge.
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| CN201920948856.XU CN210465463U (en) | 2019-06-24 | 2019-06-24 | Automatic sampling system for greenhouse gas |
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| CN201920948856.XU CN210465463U (en) | 2019-06-24 | 2019-06-24 | Automatic sampling system for greenhouse gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208562A (en) * | 2019-06-24 | 2019-09-06 | 中国科学院南京地理与湖泊研究所 | Greenhouse gases automatic sample handling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208562A (en) * | 2019-06-24 | 2019-09-06 | 中国科学院南京地理与湖泊研究所 | Greenhouse gases automatic sample handling system |
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