CN106644620B - Detachable multifunctional gas automatic acquisition method and device - Google Patents
Detachable multifunctional gas automatic acquisition method and device Download PDFInfo
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- CN106644620B CN106644620B CN201710101522.4A CN201710101522A CN106644620B CN 106644620 B CN106644620 B CN 106644620B CN 201710101522 A CN201710101522 A CN 201710101522A CN 106644620 B CN106644620 B CN 106644620B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 172
- 238000004140 cleaning Methods 0.000 claims abstract description 61
- 238000002372 labelling Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 274
- 229910000831 Steel Inorganic materials 0.000 claims description 62
- 239000010959 steel Substances 0.000 claims description 62
- 238000004891 communication Methods 0.000 claims description 29
- 238000010586 diagram Methods 0.000 description 13
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 238000010926 purge Methods 0.000 description 4
- 238000004590 computer program Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000012882 sequential analysis Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N2035/1027—General features of the devices
- G01N2035/1048—General features of the devices using the transfer device for another function
- G01N2035/1053—General features of the devices using the transfer device for another function for separating part of the liquid, e.g. filters, extraction phase
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Abstract
The invention discloses a detachable multifunctional gas automatic acquisition method, which comprises the following steps: setting up an automatic gas collection device according to the gas collection requirement; cleaning a sampling pipeline; cleaning the sampling tank; carrying out gas collection and labeling according to the gas collection requirement; and (5) disassembling the gas automatic acquisition device, and taking the boxing back to a laboratory for analysis. The invention also discloses a detachable multifunctional automatic gas collecting device. The detachable multifunctional gas automatic collection method and device disclosed by the invention integrate cleaning and sampling, can be expanded for online analysis, can be flexibly disassembled and assembled, is convenient to carry, can freely increase and decrease a gas sample collection bottle, can reduce the labor intensity and the workload of observers, and is suitable for automatic cleaning of various gas sampling devices and collection and analysis of various gas samples.
Description
Technical Field
The invention relates to the collection of near-surface gas samples. More particularly, to a method and a device for automatically collecting detachable multifunctional gas.
Background
The atmospheric environment monitoring is a measuring process for observing and analyzing the change of the concentration of pollutants in the atmospheric environment and the influence on the environment, and mainly observes the time-space distribution and change rule of the atmospheric pollutants by measuring the types and the concentration of the pollutants in the atmosphere. The monitored atmospheric pollutants mainly comprise sulfur oxides, nitrogen oxides, carbon monoxide, ozone, halogenated hydrocarbons, hydrocarbon compounds and the like; the granular pollutants mainly comprise dust fall, total suspended particles, floating dust and acid sedimentation. The atmospheric quality monitoring is to perform point-setting sampling and analysis on main pollutants in the atmosphere of a certain area. Regular monitoring of a given project is generally performed according to the scale of a region, the distribution of atmospheric pollution sources, source intensity, meteorological conditions, topography and other factors.
The gas sampling and analysis process is an important step for atmospheric environment observation, and the reliability relation of the observation data is closely related. At present, many researches and reports are carried out on the collection and detection of environmental gases. However, for collecting different gases, different sampling devices are often required to be designed, and each set of device is required to be provided with different instruments and consumables, so that the sampling cost is greatly increased. And when carrying out the open-air sampling, because the restriction of field environment, it is very inconvenient to carry and build sampling device. Meanwhile, the existing gas collection device often limits the number of gas samples, and when different gas collection requirements are met, the defect that the number of the samples is insufficient or excessive exists.
Therefore, it is necessary to provide a method and a device for automatically collecting detachable multifunctional gas.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide the automatic cleaning and collecting and analyzing device and the method which are suitable for various gas sampling devices, integrate cleaning and sampling, can be expanded for online analysis, can flexibly disassemble and assemble, are convenient to carry, freely increase and decrease gas sample collecting bottles, and reduce the labor intensity and the workload of observers.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a detachable multifunctional gas automatic collection method comprises the following steps:
s1: setting up an automatic gas collection device according to the gas collection requirement;
s2: cleaning a sampling pipeline;
s3: cleaning the sampling tank;
s4: carrying out gas collection and labeling according to the gas collection requirement;
s5: and (5) disassembling the gas automatic acquisition device, and taking the boxing back to a laboratory for analysis.
Preferably, the gas automatic acquisition device comprises:
the central control computer generates and transmits an industrial control instruction, and receives and stores the air pressure and sample gas concentration data of each steel cylinder transmitted by the industrial control module;
the industrial control module group comprises a communication module, a first industrial control module and a second industrial control module, wherein the first industrial control module executes an industrial control instruction which is sent by an industrial control computer through the communication module to control the cleaning part, the second industrial control module executes an industrial control instruction which is sent by the industrial control computer through the communication module to control the sampling part, and the communication module is used for device instruction and data communication;
the cleaning part comprises a turbomolecular pump, a zero gas generator and a humidifier;
the sampling part comprises a sampling box, a sampling pump and a plurality of sampling tanks which are connected in parallel according to the gas collection requirement;
the device also comprises a sampling gas circuit, and a gas circuit logic distributor, a flowmeter, a mass flow controller and an electronic pressure gauge which are arranged on the sampling gas circuit.
Preferably, step S2 specifically includes the following steps:
s201: the central control computer sends out a pipeline cleaning and sampling instruction through the industrial control module group;
s202: turning on a turbomolecular pump;
s203: the sampling tanks are vacuumized one by controlling the gas circuit logic distributor and taking the vacuum degree of the sampling tanks as a standard;
s204: closing each gas circuit logic distributor;
s205: starting a zero gas generator, and cleaning a pipeline for five minutes by controlling a gas circuit logic distributor;
s206: and after the cleaning is finished, the turbomolecular pump and the zero gas generator are turned off.
Preferably, the step S3 specifically includes the following steps:
s301: the central control computer sends out a command for cleaning the sampling tank through the industrial control module group;
s302: starting a zero gas generator, and introducing zero gas into the sampling tanks one by taking the pressure value of the sampling tanks as a standard by controlling the gas circuit logic distributor;
s303: starting a turbomolecular pump, and vacuumizing the sampling tanks one by taking the vacuum degree of the sampling tanks as a standard by controlling the gas circuit logic distributor;
s304: starting a zero gas generator and a humidifier, controlling the relative humidity of the humidified zero gas to be 45%, and introducing the humidified zero gas into the sampling tanks one by controlling the gas circuit logic distributor and taking the pressure value of the sampling tanks as a standard when the pressure value reaches a second threshold value;
s305: starting a turbomolecular pump, and vacuumizing the sampling tanks one by taking the vacuum degree of the sampling tanks as a standard by controlling the gas circuit logic distributor;
s306: repeating the steps S302-S305 three times to finish the cleaning of the sampling tank.
Preferably, the step S4 specifically includes the following steps:
s401: the central control computer sends out a sampling instruction through the industrial control module group;
s402: starting a sampling pump, and cleaning a sampling pipeline for five minutes by using actual atmosphere by controlling a gas circuit logic distributor;
s403: after the cleaning is finished, sampling each sampling tank by controlling the gas circuit logic distributor;
s404: in the sampling time, if the pressure of the sampling tank reaches a third threshold value, the central control computer records the pressure data of the sampling tank and marks the pressure data as a standard gas sample;
s405: in the sampling time, if the pressure of the sampling tank does not reach a third threshold value, the central control computer records the pressure data of the sampling tank and marks the pressure data as a gas sample which does not reach the standard;
s406: sampling of each sampling tank is completed one by one.
Preferably, the gas automatic acquisition apparatus further comprises:
an analysis section including an analyzer for performing on-line analysis of the sampled gas;
the industrial control module group also comprises a third industrial control module, and an industrial control instruction control analysis part which is transmitted by the industrial control computer through the communication module is executed.
Further preferably, the gas automatic collection method further comprises:
s6: the central control computer analyzes the sampled gas marked as the standard gas sample.
Further preferably, step S6 specifically includes the steps of:
s601: the central control computer sends out an analysis instruction through the industrial control module group;
s602: starting a zero gas generator, and cleaning a pipeline for five minutes by controlling a gas circuit logic distributor;
s603: the sampling gas in the sampling tank is led into the analyzer one by controlling the gas circuit logic distributor;
s604: the analyzer analyzes the sampled gas and sends analysis data to the central control computer through the industrial control module group;
s605: and (5) completing analysis of all the sampled gases marked as standard gas samples.
A detachable multifunctional gas automatic acquisition device, the device comprising:
the central control computer generates and transmits an industrial control instruction, and receives and stores the air pressure and sample gas concentration data of each steel cylinder transmitted by the industrial control module;
the industrial control module group comprises a communication module, a first industrial control module and a second industrial control module, wherein the first industrial control module executes an industrial control instruction which is sent by an industrial control computer through the communication module to control the cleaning part, the second industrial control module executes an industrial control instruction which is sent by the industrial control computer through the communication module to control the sampling part, and the communication module is used for device instruction and data communication; and
The system comprises a sampling tank, a sampling pump and a plurality of sampling tanks which are connected in parallel according to the gas collection requirement, wherein the sampling tank, the sampling pump and the plurality of sampling tanks are sequentially connected through a gas pipeline, a turbomolecular pump, a zero gas generator, a humidifier flowmeter and a mass flow controller are arranged on the pipeline between the sampling tank and the sampling tank, an electronic pressure gauge is arranged on the pipeline between the sampling tank and the sampling tank, and a gas circuit logic distributor is arranged at one side or two sides of each sampling tank port and the turbomolecular pump, the sampling tank, the sampling pump and the flowmeter in the plurality of sampling tanks;
the gas circuit logic distributor is a two-way electromagnetic valve.
Preferably, the apparatus further comprises:
an analysis section including an analyzer for performing on-line analysis of the sampled gas;
the industrial control module group also comprises a third industrial control module, and an industrial control instruction control analysis part which is transmitted by the industrial control computer through the communication module is executed.
The beneficial effects of the invention are as follows:
the detachable multifunctional gas automatic collection method and device provided by the invention integrate cleaning and sampling, can be expanded for online analysis, can be flexibly disassembled and assembled, is convenient to carry, can freely increase and decrease a gas sample collection bottle, can reduce the labor intensity and the workload of observers, and is suitable for automatic cleaning of various gas sampling devices and collection and analysis of various gas samples.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Fig. 1 shows a general block diagram of a detachable multifunctional gas automatic acquisition device.
Fig. 2 shows a circuit diagram of a detachable multifunctional gas automatic acquisition device.
Fig. 3a shows an outdoor air circuit diagram of the detachable multifunctional gas automatic acquisition device in the embodiment.
Fig. 3b shows a laboratory gas circuit diagram of a detachable multifunctional gas automatic acquisition device in an embodiment.
Fig. 4a shows the gas circuit logic 1-cylinder evacuation in the gas circuit logic distributor operating diagram.
Figure 4b shows the gas circuit logic 2-sample tank pressed in with humidified zero gas in the gas circuit logic distributor operating diagram.
Fig. 4c shows the gas circuit logic 3-line purge in the gas circuit logic distributor operation diagram.
Fig. 4d shows the gas circuit logic 4-actual atmospheric purge line in the gas circuit logic distributor operating diagram.
Fig. 4e shows the gas circuit logic 5-sample tank sampling in the gas circuit logic distributor operation diagram.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to preferred embodiments and the accompanying drawings. Like parts in the drawings are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
Fig. 1 shows a general block diagram of a detachable multifunctional gas automatic acquisition device, consisting of a central control computer 1, an industrial control module group 2, a cleaning part 3, a sampling part 4 and an analysis part 5, wherein:
the central control computer 1 is an industrial control computer, is connected with the industrial control module group 2 through an RS232 interface, generates and transmits industrial control instructions of a turbomolecular pump, a zero gas generator, a humidifier, a sampling pump, a gas circuit and gas collection and analysis through an industrial control configuration software programming in the central control computer 1; receiving and storing analog signals of the gas pressure and the sample gas concentration data of each steel cylinder sent by the industrial control module group 2;
the industrial control module group 2 is respectively connected with the central control computer 1, the cleaning part 3, the acquisition part 4 and the analysis part 5; the industrial control module group 2 receives industrial control instructions of a turbomolecular pump, a zero gas generator, a humidifier, a sampling pump, a gas circuit and gas collection and analysis, which are generated and sent by the central control computer 1; receiving the voltage signals reflecting the gas pressure data of each steel cylinder output by the cleaning part 3 and the sampling part 4, and receiving the voltage signals with the gas concentration data output by the analysis part 5; the industrial control module group 2 carries out voltage conversion on industrial control instructions of the turbomolecular pump, the zero gas generator, the humidifier, the sampling pump, the gas circuit and the gas collection and analysis to generate and output multi-way switch signals for controlling the turbomolecular pump, the zero gas generator, the humidifier and the sampling pump, multi-way switch voltage signals for controlling the gas collection and analysis, and the multi-way switch voltage signals are used for controlling the turbomolecular pump, the zero gas generator, the humidifier and the sampling pump to be automatically opened and closed according to the industrial control instructions, for controlling the cleaning part 3 and the sampling part 4 to sequentially clean and sequentially sample the sampling tank according to the industrial control instructions, and for controlling the analyzer of the analysis part 5 to analyze gas samples according to the industrial control instructions; the industrial control module group 2 processes the voltage signals which are output by the cleaning part 3 and the sampling part 4 and reflect the air pressure data of each steel cylinder, and generates and outputs analog signals containing the air pressure data; the industrial control module group 2 processes the voltage signal having the gas concentration data outputted from the analysis unit 5, and generates and outputs an analog signal containing the gas concentration data.
Fig. 2 shows a circuit diagram of a detachable multifunctional gas auto-collection device, wherein: the industrial control module group 2 includes a communication module 21, a first industrial control module 22, a second industrial control module 23, and a third industrial control module 24. The first industrial control module 22 is connected with the cleaning part 3, executes industrial control computer programs to control the opening and closing of the turbomolecular pump, the gas circuit logic distributor, the zero gas generator and the humidifier in the cleaning part 3 through industrial control instructions sent by the communication module 21, and receives and stores analog signals of the gas pressure data of each steel cylinder sent by the electronic pressure gauge; the second industrial control module 23 is connected with the sampling part 4, executes industrial control instructions sent by an industrial control computer program through the communication module 21, controls the sampling pump and the air path logic distributor in the sampling part 4 to be opened and closed, and receives and stores analog signals of air pressure data of each steel cylinder sent by the electronic pressure gauge; the third industrial control module 24 is connected with the analysis part 5, executes industrial control computer program and controls various analyzers in the analysis part 5, such as a gas chromatograph-mass spectrometer or a gas chromatograph, a zero gas generator and a gas path logic distributor to open and close, and receives and stores analog signals containing various analyzer data.
The communication module 21 is connected with the central control computer 1 through an interface and is connected with the first industrial module control 22, the second industrial control module 23 and the third industrial control module 24 in parallel through a communication bus; the communication module 21 receives an industrial control instruction sent by an industrial control configuration program of the central control computer 1, and transmits the industrial control instruction to the first industrial control module 22, the second industrial control module 23 and the third industrial control module 24; the communication module 21 receives analog signals sent by the first industrial control module 22, the second industrial control module 23 and the third industrial control module 24 and transmits the analog signals to the central control computer 1; the first industrial control module 22 receives the industrial control instruction and converts the industrial control instruction into a switching value signal to be transmitted to the cleaning part 3, and is used for controlling a turbomolecular pump in the cleaning part 3, an air path logic distributor, a zero gas generator and a humidifier for controlling the humidity to be controlled at 45% to be opened and closed, and receives a voltage signal which is generated by an electronic pressure gauge and reflects the air pressure data of each steel cylinder and converts the voltage signal into an analog signal to be transmitted to the communication module 21; the second industrial control module 23 receives the industrial control instruction, converts the industrial control instruction into a switching value signal, sends the switching value signal to the sampling part 4, is used for controlling the opening and closing of a sampling pump and an air path logic distributor in the sampling part 4, receives a voltage signal which is generated by an electronic pressure gauge and reflects the air pressure data of each steel cylinder, converts the voltage signal into an analog signal and sends the analog signal to the communication module 21; the third industrial control module 24 receives the industrial control instruction and converts the industrial control instruction into a switching value signal to be sent to the analysis part 5, and is used for controlling the opening and closing of various analyzers in the analysis part 5, such as a gas chromatograph-mass spectrometer or a gas chromatograph, a zero gas generator and a gas path logic distributor, receiving voltage signals containing data of various analyzers, converting the voltage signals into analog signals and sending the analog signals to the communication module 21.
The cleaning part 3 comprises a gas circuit logic distributor 31 and a cleaning unit 32, wherein the cleaning unit 32 comprises a turbomolecular pump, a zero gas generator, a humidifier, an electronic pressure gauge, a flow controller and a flowmeter; the gas circuit logic distributor 31 is connected with the industrial control module group 2, and the cleaning unit 32 is connected with the gas circuit logic distributor 31; the gas circuit logic distributor 31 receives the switch signal output by the first industrial control module 22 of the industrial control module group 2, generates and outputs a control signal for switching between zero gas feeding and vacuum pumping to the steel cylinders, and controls the working condition of each part in the cleaning unit 32; the electronic pressure gauge generates a voltage signal reflecting the air pressure data of each steel cylinder and sends the voltage signal to the industrial control module 22, and the voltage signal is used for determining whether the vacuum degree of the steel cylinder reaches the set requirement and making a judgment, and the sequential cleaning of each steel cylinder is completed through the air circuit logic distributor 31.
The sampling part 4 comprises a gas circuit logic distributor 33 and a sampling unit 34, and the sampling unit 34 comprises a sampling pump and an electronic pressure gauge; the gas circuit logic distributor 33 is connected with the industrial control module group 2, and the sampling unit 34 is connected with the gas circuit logic distributor 33; the gas circuit logic distributor 33 receives the switch signal output by the second industrial control module 23 of the industrial control module group 2, generates and outputs a control signal for switching between sampling steel cylinders, and controls the working condition of each component in the cleaning unit 34; the electronic pressure gauge generates a voltage signal reflecting the air pressure data of each steel cylinder and sends the voltage signal to the industrial control module 23, and the voltage signal is used for determining whether the vacuum degree of the steel cylinder reaches the set requirement and making a judgment, and the sequential sampling of each steel cylinder is completed through the air circuit logic distributor 33.
The analysis part 5 comprises a gas circuit logic controller 35, a zero gas generator and various analyzers (a gas chromatograph-mass spectrometer 36 or a gas chromatograph 37); the gas circuit logic distributor 35 is connected with the industrial control module group 2, and various analyzers (a gas chromatograph-mass spectrometer 36 or a gas chromatograph 37) are connected with the gas circuit logic distributor 35; the gas circuit logic distributor 33 receives the switching signal output by the third industrial control module 24 of the industrial control module group 2, generates and outputs a control signal for switching the gas sample among various analyzers (a gas chromatograph-mass spectrometer 36 or a gas chromatograph 37); concentration data of the gas samples are generated and output by various analyzers (gas chromatograph-mass spectrometer 36 or gas chromatograph 37) and sent to the third industrial control module 24 as voltage signals for completing sequential analysis of the samples.
The communication module is 485 module, and the industrial control module group comprises a switching value module, an analog quantity module, a two-way switching power supply and an alternating current luminous tube indicator lamp.
In this embodiment, 10 cylinders are taken as an example, and the sampling tank is a cylinder. Fig. 3a shows a gas circuit diagram of a detachable multifunctional gas automatic acquisition device, which consists of a cleaning part 3 and a sampling part 4, and comprises a gas circuit logic distributor (31 and 33), a cleaning unit 32 (a turbo molecular pump A1, a zero gas generator A2, a humidifier A3 and an electronic pressure meter A4, a mass flow controller A5 and a flowmeter A6), a sampling unit 34 (a sampling pump B1 and an electronic pressure meter A4), a sampling box B2, a steel bottle and a stainless steel pipeline. The gas circuit logic distributor (31 and 33) consists of seventeen two-way electromagnetic valves (T1-T7, S01-S10), T2 is connected with a turbomolecular pump A1, T3 is connected with a flowmeter A6, T5 and T6 are connected with a sampling pump B1 in series, T4 is connected with two-way electromagnetic valves S01-S10 of a control steel cylinder, and the two-way electromagnetic valves S01-S10 are connected with a two-way electromagnetic valve T7 at the tail of a pipeline after being connected in parallel.
The two-way solenoid valve T1 connected with the sampling box B2, the two-way solenoid valve T2 connected with the turbomolecular pump A1, the two-way solenoid valve T3 connected with the flowmeter A6, the two-way solenoid valve T4 connected with the two-way solenoid valves S01-S10 of the control steel cylinder, the two-way solenoid valves T5 and T6 connected with the sampling pump B1 in series, the two-way solenoid valve T7 at the tail end of a pipeline and the two-way solenoid valves S01-S10 of the control steel cylinder are all one-bit two-way solenoid valves, and the pipeline is disconnected under the condition of no power supply (closed) and the pipeline is communicated under the condition of power supply (opened);
seventeen two-way solenoid valves of the gas circuit logic distributor (31 and 33) are controlled by a program to realize a switch state, and five logic states are completed: (1) vacuumizing a steel bottle; (2) zero gas is introduced into the steel cylinder; (3) zero gas cleaning pipeline; (4) an actual atmospheric cleaning pipeline; (5) sampling a steel bottle.
Fig. 4a to 4e show the operation of the respective solenoid valves of the gas logic distributor (31 and 33) under different gas logic. The gas circuit logic distributor (31 and 33) consists of a two-way solenoid valve T2 connected with a turbomolecular pump A1, a two-way solenoid valve T3 connected with a flowmeter A6, a two-way solenoid valve T4 connected with a two-way solenoid valve SX for controlling a steel cylinder, two-way solenoid valves T5 and T6 connected with a sampling pump B1 in series, a two-way solenoid valve T7 at the tail end of a pipeline and two-way solenoid valves S01-S10 for controlling the steel cylinder, and steel cylinder cleaning, pipeline cleaning and steel cylinder sampling are respectively completed through the combination of the seventeen two-way solenoid valves in different states.
FIG. 4a shows the gas path logic (1) -the cylinder is vacuumized, at this time, the two-way solenoid valve T2 connected with the turbomolecular pump A1 is opened, the two-way solenoid valve T4 connected with the two-way solenoid valve SX for controlling the cylinder is opened, the other two-way solenoid valves T1, T3, T5, T6 and T7 are all closed, the two-way solenoid valves for controlling the cylinder are all closed except SX, and the two-way solenoid valve SX for controlling the cylinder to be vacuumized is opened;
FIG. 4b shows the gas path logic (2) -the cylinder is filled with zero gas, at this time, the two-way solenoid valve T3 connected with the flow meter A6 is opened, the two-way solenoid valve T4 connected with the two-way solenoid valve SX for controlling the cylinder is opened, the other two-way solenoid valves T1, T2, T5, T6 and T7 are all closed, the two-way solenoid valves for controlling the cylinder are all closed except SX, and the two-way solenoid valve SX for controlling the cylinder needing zero gas is opened;
FIG. 4c shows the gas circuit logic (3) -zero gas purge line, where the two-way solenoid valve T3 connected to the flow meter A6 is open, the two-way solenoid valve T4 connected to the two-way solenoid valve SX of the control cylinder is open, the two-way solenoid valve T7 at the end of the line is open, the remaining two-way solenoid valves T1, T2, T5 and T6 are all closed, and all the two-way solenoid valves S01-S10 of the control cylinder are all closed;
FIG. 4d shows the gas circuit logic (4) -the actual atmospheric purge line, at this time, the two-way solenoid valve T1 connected to the sampling tank B2 is opened, the two-way solenoid valves T5 and T6 connected in series to the sampling pump B1 are opened, the two-way solenoid valve T7 at the end of the line is opened, the remaining two-way solenoid valves T2, T3 and T4 are all closed, and all the two-way solenoid valves S01-S10 controlling the steel cylinders are all closed;
fig. 4e shows the gas circuit logic (5) -sampling the steel cylinder, at this time, the two-way electromagnetic valve T1 connected with the sampling box B1 is opened, the two-way electromagnetic valves T5 and T6 connected in series with the sampling pump B1 are opened, the other two-way electromagnetic valves T2, T3, T4 and T7 are all closed, the two-way electromagnetic valves controlling the steel cylinder are all closed except SX, and the two-way electromagnetic valve SX of the steel cylinder to be sampled is opened.
The following describes the specific working steps of the detachable multi-gas automatic collection device according to fig. 3a, taking 10 sampling cylinders as an example:
step S1: the central control computer 1 sends out instructions through an industrial control configuration program, after the first industrial control module 22 receives the instructions, the turbo molecular pump A1 is started, the gas path logic distributor 31 receives the instructions, the state of the gas path logic distributor 31 is converted into gas path logic (1) -steel bottle vacuumizing, the two-way solenoid valve T2 connected with the turbo molecular pump A1 is opened, the two-way solenoid valve T4 connected with the two-way solenoid valves S01-S10 of the control steel bottle is opened, the two-way solenoid valve S01 of the bottle 1 is opened, an air suction channel is opened, gas in the bottle 1 flows out from the turbo molecular pump A1 through a pipeline, the two-way solenoid valve S01 and the two-way solenoid valve T4 of the bottle 1, the two-way solenoid valve T2 connected with the turbo molecular pump A1 is started, when the absolute pressure of the bottle 1 reaches 0.1Pa, the two-way solenoid valve S01 of the bottle 1 is closed automatically, the two-way solenoid valve S02 of the bottle 2 is opened, and the two-way solenoid valve S2 is opened, and the two-way solenoid pump A2 is closed automatically, and the two-way solenoid valve A2 is opened and the two-way solenoid valve A2 is closed sequentially, and the two-way solenoid valve A2 is opened and the two-2 is opened, and two-2 is opened and 2 and two-opened, and two-way solenoid valve 2 is opened and 2 is opened; after the air circuit logic distributor 31 receives the instruction, the state of the air circuit logic distributor 31 is converted into an air circuit logic (3) -zero air cleaning pipeline, a two-way electromagnetic valve T3 connected with a flowmeter A6 is opened, a two-way electromagnetic valve T7 at the tail of the pipeline is opened, two-way electromagnetic valves S01-S10 of all control steel cylinders are closed, the pipeline is flushed for 5 minutes, and the zero air passes through the pipeline, a flow controller A5, the flowmeter A6, the two-way electromagnetic valves T3, the two-way electromagnetic valve T4, the two-way electromagnetic valve T7 and the outflow pipeline;
step S2: the central control computer 1 sends out an instruction through an industrial control configuration program, the first industrial control module 22 receives the instruction, then starts the zero gas generator A2, controls the flow to be 5L/min, the gas path logic distributor 31 receives the instruction, then the state of the gas path logic distributor 31 is converted into a gas path logic (3) -zero gas cleaning pipeline, a two-way electromagnetic valve T3 connected with a flowmeter A6 is opened, a two-way electromagnetic valve T7 at the tail of the pipeline is opened, two-way electromagnetic valves S01-S10 of all control steel cylinders are closed, the pipeline is flushed for 5 minutes, and the zero gas passes through the pipeline, a flow controller A5, a flowmeter A6, the two-way electromagnetic valve T3, the two-way electromagnetic valve T4, the two-way electromagnetic valve T7 and a outflow pipeline; after the gas circuit logic distributor 31 receives the instruction, the state of the gas circuit logic distributor 31 is changed into a gas circuit logic (2) -a steel bottle is filled with zero gas, the two-way electromagnetic valve T7 is closed, the two-way electromagnetic valve S01 of the bottle No. 1 is opened, the gas inlet channel is opened, the zero gas passes through a pipeline, the flow controller A5, the flowmeter A6, the two-way electromagnetic valve T3, the two-way electromagnetic valve T4 and the two-way electromagnetic valve S01, the bottle No. 1 is entered, when the absolute pressure of the bottle No. 1 reaches 300kPa, the two-way electromagnetic valve S01 of the bottle No. 1 is automatically closed, the two-way electromagnetic valve S02 of the bottle No. 2 is opened, zero gas is started to be filled into the bottle No. 2, the zero gas passes through the pipeline, the flow controller A5, the flowmeter A6, the two-way electromagnetic valve T3, the two-way electromagnetic valve T4 and the two-way electromagnetic valve S02, the bottle No. 2 is entered, when the absolute pressure of the bottle No. 2 reaches 300kPa, the two-way electromagnetic valve S02 of the bottle No. 3 is automatically closed, the two-way electromagnetic valve S03 of the bottle No. 3 is opened, the bottle No. 3 is automatically closed, the zero gas is sequentially filled with the zero gas to the bottle No. 2 is completely closed, and the zero gas valve A is sequentially closed, and the zero gas is completely closed, and the zero gas valve A and the zero gas is completely closed;
step S3: the central control computer 1 sends out instructions through an industrial control configuration program, the first industrial control module 22 starts the turbomolecular pump A1 again after receiving the instructions, the gas path logic distributor 31 converts the state of the gas path logic distributor 31 into gas path logic (1) -the steel bottle is vacuumized, the two-way electromagnetic valve T2 connected with the turbomolecular pump A1 is opened, the two-way electromagnetic valve T4 connected with the two-way electromagnetic valves S01-S10 for controlling the steel bottle is opened, the two-way electromagnetic valve S01 for controlling the steel bottle is opened, the air suction channel is opened, the gas in the bottle 1 passes through a pipeline, the two-way electromagnetic valve S01 for controlling the bottle 1, the two-way electromagnetic valve T4 and the two-way electromagnetic valve T2 connected with the turbomolecular pump A1, when the absolute pressure of the No. 1 bottle reaches 0.1Pa, automatically closing the two-way electromagnetic valve S01 of the No. 1 bottle, opening the two-way electromagnetic valve S02 of the No. 2 bottle, starting vacuumizing the No. 2 bottle, enabling gas in the No. 2 bottle to flow out of the turbomolecular pump A1 through a pipeline, controlling the two-way electromagnetic valve S02, the two-way electromagnetic valve T4 and the two-way electromagnetic valve T2 of the No. 2 bottle, when the absolute pressure of the No. 2 bottle reaches 0.1Pa, automatically closing the two-way electromagnetic valve S02 of the No. 2 bottle, opening the two-way electromagnetic valve S03 of the No. 3 bottle, starting vacuumizing the No. 3 bottle … … and the like, sequentially completing the second vacuumizing of all 10 steel bottles, closing the turbomolecular pump A1, and closing the two-way electromagnetic valve T2;
step S4: the central control computer 1 sends out an instruction through an industrial control configuration program, the first industrial control module 22 receives the instruction, then opens a zero air generator A2, opens a humidifier A3 (the relative humidity is controlled to be 45% of zero air), controls the flow to be 5L/min, after the air path logic distributor 31 receives the instruction, the state of the air path logic distributor 31 is changed into air path logic (2) -the steel bottle is filled with zero air, the two-way electromagnetic valve T3 connected with the flowmeter A6 is opened, the two-way electromagnetic valve S01 of the bottle No. 1 is opened, the air inlet channel is opened, the humidifying zero air passes through a pipeline, a flow controller A5, the flowmeter A6, the two-way electromagnetic valve T3, the two-way electromagnetic valve T4 and the two-way electromagnetic valve S01, and enters a bottle No. 1, when the absolute pressure of the bottle No. 1 reaches 300kPa, the two-way electromagnetic valve S01 of the bottle No. 1 is automatically closed, the two-way electromagnetic valve S02 is opened, the two-way electromagnetic valve S2 is started to be filled with the humidifying zero air to be connected with the bottle No. 2, the two-way electromagnetic valve T3, the two-way electromagnetic valve S3 is opened, the two-way electromagnetic valve S02 of the bottle No. 2 is opened, and the two-way electromagnetic valve S3 is closed, and the two-way electromagnetic valve S3 is sequentially opened to be opened, and the two-way electromagnetic valve S3 is closed to be opened to the two-way electromagnetic valve A3 and the two-way electromagnetic valve A3 is opened, and the two-way valve is opened to be closed, and the two-connected to be opened to be a zero-connected to a bottle and a valve;
step S5: the central control computer 1 sends out instructions through an industrial control configuration program, the first industrial control module 22 starts the turbomolecular pump A1 again after receiving the instructions, the gas path logic distributor 31 converts the state of the gas path logic distributor 31 into gas path logic (1) -the steel bottle is vacuumized, the two-way electromagnetic valve T2 connected with the turbomolecular pump A1 is opened, the two-way electromagnetic valve T4 connected with the two-way electromagnetic valves S01-S10 for controlling the steel bottle is opened, the two-way electromagnetic valve S01 for controlling the steel bottle is opened, the air suction channel is opened, the gas in the bottle 1 passes through a pipeline, the two-way electromagnetic valve S01 for controlling the bottle 1, the two-way electromagnetic valve T4 and the two-way electromagnetic valve T2 connected with the turbomolecular pump A1, when the absolute pressure of the No. 1 bottle reaches 0.1Pa, automatically closing the two-way electromagnetic valve S01 of the No. 1 bottle, opening the two-way electromagnetic valve S02 of the No. 2 bottle, starting vacuumizing the No. 2 bottle, enabling gas in the No. 2 bottle to flow out of the turbomolecular pump A1 through a pipeline, controlling the two-way electromagnetic valve S02, the two-way electromagnetic valve T4 and the two-way electromagnetic valve T2 of the No. 2 bottle, when the absolute pressure of the No. 2 bottle reaches 0.1Pa, automatically closing the two-way electromagnetic valve S02 of the No. 2 bottle, opening the two-way electromagnetic valve S03 of the No. 3 bottle, starting vacuumizing the No. 3 bottle … … and the like, sequentially completing third vacuumizing of all 10 steel bottles, closing the turbomolecular pump A1, and closing the two-way electromagnetic valve T2;
and repeating the steps S21-S5 to finish one round of three times of zero gas injection and zero gas humidification to the sampling steel cylinder, and performing nine-six times of vacuumizing to achieve the expected cleaning effect.
Step S6: the central control computer sends out a sampling instruction through an industrial control configuration program, after the second industrial control module 23 receives the instruction, the sampling pump B1 is started, after the gas path logic distributor 33 receives the instruction, the state of the gas path logic distributor 33 is converted into gas path logic (4) -an actual atmosphere cleaning pipeline, two-way electromagnetic valves T5 and T6 connected with the sampling pump B1 in series are opened, an electrified electromagnetic valve T7 at the tail end of the pipeline is opened, the two-way electromagnetic valve T1 connected with the sampling box B2 is opened, the two-way electromagnetic valve T4 is closed, two-way electromagnetic valves S01-S10 of all control cylinders are closed, the sampling pump B1 sends actual atmosphere into the pipeline, and the whole pipeline is flushed for 5 minutes, and the actual atmosphere passes through the pipeline, the two-way electromagnetic valve T1, the two-way electromagnetic valve T5, the sampling pump B1, the two-way electromagnetic valve T6, the two-way electromagnetic valve T7 and the outflow pipeline; after the gas circuit logic distributor 31 receives the instruction, the state of the gas circuit logic distributor 31 is converted into gas circuit logic (5) -steel bottle sampling, the two-way electromagnetic valve T7 is closed, the two-way electromagnetic valve S01 of the bottle No. 1 is opened, the air inlet channel is opened, the actual atmosphere enters the bottle No. 1 through a pipeline, the two-way electromagnetic valve T1, the two-way electromagnetic valve T5, the sampling pump B1, the two-way electromagnetic valve T6 and the two-way electromagnetic valve S01, if the pressure of the sampling steel bottle is less than 300kPa, sampling is continued, the pressure value of the bottle No. 1 reaches 300kPa, the central computer records corresponding data, and the corresponding data is automatically marked as a standard gas sample through a program, and the two-way electromagnetic valve S01 of the bottle No. 1 is automatically closed; if the pressure of the sampling steel bottle does not reach 300kPa, the central computer continues to sample, and if the pressure of the sampling steel bottle reaches 300kPa, the central computer records corresponding data, and automatically marks the pressure of the No. 2 bottle as a standard gas sample by the program, and automatically closes the No. 2 bottle two-way electromagnetic valve S02; if 300kPa is not reached within 3 minutes, the central computer records corresponding data, automatically marks alarm values through a program, rapidly switches to the next sampling channel, carries out sample No. 3 bottle … … and the like, sequentially completes the sampling of all 10 steel cylinders, and closes the sampling pump B1.
After the sampling of all the steel cylinders is completed, the valves on all the steel cylinders are closed, all the instrument parts are disassembled, and the boxing is carried back for laboratory analysis. The device was assembled according to the laboratory gas circuit diagram shown in fig. 3 b;
step S7: the central control computer judges whether on-line analysis is carried out according to the alarm value marked on the steel cylinders, the classification of which is carried out on all the steel cylinder gas samples does not reach the sampling pressure during sampling, if the next gas sample to be analyzed is an alarm sample which does not reach the standard, the gas sample is automatically skipped, the two-way electromagnetic valve of the channel is kept in a closed state, and the central control computer judges whether the next gas sample reaches the standard; if the next non-alarm sample of the gas sample to be analyzed is a standard gas sample, an analysis instruction is sent out through an industrial control configuration program, after the third industrial control module 24 receives the instruction, a zero gas generator A2 is started, the control flow is 5L/min, after the gas circuit logic distributor 35 receives the instruction, a two-way electromagnetic valve T3 is opened, two-way electromagnetic valves S01-S10 of all control cylinders are closed, a zero gas flushing pipeline is allowed to be carried out for 5 minutes, after the zero gas generator A2 is closed after cleaning is finished, the two-way electromagnetic valve T3 is closed, the two-way electromagnetic valve S01 of a first sampling cylinder is opened, the pressure of the cylinder meets the online analysis requirement, the sampling is positive pressure, the pipeline can be flushed, and after 10 seconds, gas in the sampling cylinder enters the analyzer or a sample injector of the analyzer to be enriched and concentrated, so that the analysis of the sample is completed, and analysis data is fed back to a central control computer; after the analysis of the gas sample is finished, the central control computer continuously judges whether the next gas sample is the standard gas sample … … and the like, and the analysis of all the gas samples is finished. The central control computer judges whether to perform online analysis according to the alarm value marked on the steel bottle which does not reach the sampling pressure during sampling, and if the next sample to be analyzed is an alarm sample, the computer automatically skips; if the next sample to be analyzed is a non-alarm sample, an analysis instruction is sent out through an industrial control configuration program, after the third industrial control module 24 receives the instruction, the zero gas generator A2 is started, the control flow is 5L/min, the gas circuit logic distributor 35 receives the instruction, the two-way electromagnetic valves T3 are opened, the two-way electromagnetic valves S01-S10 of all control steel cylinders are closed, the whole pipeline is cleaned by zero gas for 5 minutes, the zero gas generator A2 is closed after cleaning, the two-way electromagnetic valve T3 is closed, the two-way electromagnetic valve S02 of the second sampling steel cylinder is opened, the sampling steel cylinder can be used for flushing the pipeline by positive pressure sample gas, the gas circuit logic distributor is opened after 10S to enable the gas in the sampling steel cylinder to enter the analyzer, the sampling result is given by analysis and fed back to the central computer, and the cycle is repeated until the analysis of all the gas is completed.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (4)
1. A method for automatically collecting detachable multifunctional gas, which is characterized by comprising the following steps:
s1: setting up an automatic gas collection device according to the gas collection requirement;
s2: cleaning a sampling pipeline;
s3: cleaning the sampling tank;
s4: carrying out gas collection and labeling according to the gas collection requirement;
s5: disassembling the automatic gas collection device, and carrying the boxing to a laboratory for analysis;
the gas automatic acquisition device comprises:
the central control computer generates and transmits an industrial control instruction, and receives and stores the air pressure and sample gas concentration data of each steel cylinder transmitted by the industrial control module;
the industrial control module group comprises a communication module, a first industrial control module and a second industrial control module, wherein the first industrial control module executes an industrial control instruction which is sent by an industrial control computer through the communication module to control the cleaning part, the second industrial control module executes an industrial control instruction which is sent by the industrial control computer through the communication module to control the sampling part, and the communication module is used for device instruction and data communication;
the cleaning part comprises a turbomolecular pump, a zero gas generator and a humidifier;
the sampling part comprises a sampling box, a sampling pump and a plurality of sampling tanks which are connected in parallel according to the gas collection requirement;
the device also comprises a sampling gas circuit, and a gas circuit logic distributor, a flowmeter, a mass flow controller and an electronic pressure gauge which are arranged on the sampling gas circuit;
the step S2 specifically includes the following steps:
s201: the central control computer sends out a pipeline cleaning and sampling instruction through the industrial control module group;
s202: turning on a turbomolecular pump;
s203: the sampling tanks are vacuumized one by controlling the gas circuit logic distributor and taking the vacuum degree of the sampling tanks as a standard;
s204: closing each gas circuit logic distributor;
s205: starting a zero gas generator, and cleaning a pipeline for five minutes by controlling a gas circuit logic distributor;
s206: after the cleaning is finished, the turbomolecular pump and the zero gas generator are closed;
the step S3 specifically comprises the following steps:
s301: the central control computer sends out a command for cleaning the sampling tank through the industrial control module group;
s302: starting a zero gas generator, and introducing zero gas into the sampling tanks one by taking the pressure value of the sampling tanks as a standard by controlling the gas circuit logic distributor;
s303: starting a turbomolecular pump, and vacuumizing the sampling tanks one by taking the vacuum degree of the sampling tanks as a standard by controlling the gas circuit logic distributor;
s304: starting a zero gas generator and a humidifier, controlling the relative humidity of the humidified zero gas to be 45%, and introducing the humidified zero gas into the sampling tanks one by controlling the gas circuit logic distributor and taking the pressure value of the sampling tanks as a standard when the pressure value reaches a second threshold value;
s305: starting a turbomolecular pump, and vacuumizing the sampling tanks one by taking the vacuum degree of the sampling tanks as a standard by controlling the gas circuit logic distributor;
s306: repeating the steps S302-S305 for three times to finish the cleaning of the sampling tank;
the step S4 specifically includes the following steps:
s401: the central control computer sends out a sampling instruction through the industrial control module group;
s402: starting a sampling pump, and cleaning a sampling pipeline for five minutes by using actual atmosphere by controlling a gas circuit logic distributor;
s403: after the cleaning is finished, sampling each sampling tank by controlling the gas circuit logic distributor;
s404: in the sampling time, if the pressure of the sampling tank reaches a third threshold value, the central control computer records the pressure data of the sampling tank and marks the pressure data as a standard gas sample;
s405: in the sampling time, if the pressure of the sampling tank does not reach a third threshold value, the central control computer records the pressure data of the sampling tank and marks the pressure data as a gas sample which does not reach the standard;
s406: sampling of each sampling tank is completed one by one.
2. The automatic gas collection method according to claim 1, wherein the automatic gas collection device further comprises:
an analysis section including an analyzer for performing on-line analysis of the sampled gas;
the industrial control module group also comprises a third industrial control module, and an industrial control instruction control analysis part which is transmitted by the industrial control computer through the communication module is executed.
3. The automatic gas collection method according to claim 2, further comprising:
s6: the central control computer analyzes the sampled gas marked as the standard gas sample.
4. The automatic gas collection method according to claim 3, wherein the step S6 specifically comprises the steps of:
s601: the central control computer sends out an analysis instruction through the industrial control module group;
s602: starting a zero gas generator, and cleaning a pipeline for five minutes by controlling a gas circuit logic distributor;
s603: the sampling gas in the sampling tank is led into the analyzer one by controlling the gas circuit logic distributor;
s604: the analyzer analyzes the sampled gas and sends analysis data to the central control computer through the industrial control module group;
s605: and (5) completing analysis of all the sampled gases marked as standard gas samples.
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| CN112477813B (en) * | 2019-09-12 | 2022-06-28 | 长沙智能驾驶研究院有限公司 | Cleaning control method and device of sensing equipment, vehicle and cleaning control system of vehicle |
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