CN207764177U - A kind of countryside portable gas-detecting device - Google Patents

Abstract

The utility model proposes a kind of countryside portable gas-detecting device, including babinet, babinet is provided with gas sampling unit, and the babinet is internally provided with gas separation unit, detection unit, data acquisition and processing unit, control unit and carrier gas unit；Wherein, the gas separation unit is arranged in an independent separator box, and the separator box is provided with three air inlet pipe and three exhaust pipes of its inside of connection.The countryside portable gas-detecting device of the utility model provides the overall structure being integrated in built in whole in babinet, easy to carry and transport, and the emergent gas analysis for being suitable for various wild environments detects.The gas separation unit of absolute construction can facilitate to form the highly integrated gas analyzer for facilitating exchange, reduce the quantity of connecting pipe and the quantity of control valve, can effectively reduce systematic error, improve the accuracy of detection and reliability of system.

Description

A kind of countryside portable gas-detecting device

Technical field

The utility model is related to the gas detection of field of environment protection and analytical technology, especially one kind can be used for detection gas at The detection device divided, especially a kind of countryside portable gas-detecting device.

Background technology

Field of environment protection is frequently necessary to be detected analysis to various gases, and what is be typically used for is gas chromatograph.Gas phase color Spectrometer is the device that will be mixed sample and carry out analysis detection, generally includes air-channel system, sampling system, piece-rate system, circuit control System processed, detecting system, data acquisition and processing system etc..But existing gas chromatograph is generally all mounted on laboratory Interior, overall volume is very huge, needs to connect complicated airflow line and various power supplies and control line between each system The connection reliability of cable etc., whole device is highly unstable, varies slightly with regard to needing to reexamine calibration, is substantially absent from The possibility that can be convenient for carrying.

106841483 A of CN disclose a kind of chromatography column feed materials separator, are joined by an eight ways valve and ten-way valve With to improve analysis efficiency.But two sleeving valves used have been only the time utilization gas circuit of half of half, two sets of gas The mutual simultaneously onrelevant in road.As a result, the difference of two sets of gas circuits is easy to that systematic error, such as two quantity tubes is brought necessarily to deposit In volume difference, thus there are unavoidable systematic errors.And more gas path pipes need a large amount of connecting pipe, pipeline More, the error that gas circuit volume is brought is bigger, and pipeline material is bigger to the Adsorption Effect of ingredient in gas.In addition, pipeline is more, Connector is more easy to happen connecting fault, and the time of calibration and investigation failure greatly increases, the reliability of system thus can be deteriorated.And The control conversion of the problem of use of two sleeving valves brings synchronism, system is complicated, the volume that two sleeving valves occupy also bigger, it is difficult to For portable emergency sampling analysis.

104374860 A of CN disclose a kind of Portable exhaust gas analyzer, and which employs independent ten-way valve cooperations two A chromatographic column carries out separation post analysis to gas.However the introduction of the general frame of the Portable exhaust gas analyzer of the prior art It is very simple and crude, it is merely illustrative including babinet, the interior setting automatic sampling sample introduction mechanism of babinet, sample gas separating mechanism and chromatography detection machine Structure, automatic sampling sample introduction mechanism include ten-way valve, sampling ring, and mixed gas separating mechanism includes mainly rough segmentation chromatographic column, subdivision The pipeline and heat-preservation cotton of chromatographic column and auxiliary, mixed gas testing agency include mainly fuel cell and the pipeline of auxiliary.As for Without any explanation, those skilled in the art can not imagine for the conveying of gas, the calibration of equipment, the control of equipment etc. The overall structure of the Portable exhaust gas analyzer of the prior art.In addition, the prior art is using side associated with two chromatographic columns Formula carries out the separation of gas, and deimpurity influence is gone by concatenated mode, and two chromatographic columns keep durations series connection when use, One state sampling plus detergent line, sample introduction is analyzed for a state.But double chromatographic columns of the prior art are to continue series connection to make With, can only according to the protrusion target zone species of two pillar selectivity, to ignore remaining section, but the prior art without Method removes interfering substance, and the peak type of the different components in minimum gas can not be pulled open to amplification, the peak type of the species of target zone Subdivision is inadequate, and precision of analysis need to be improved.

Utility model content

The technical problem to be solved by the present invention is to provide a kind of countryside portable gas-detecting devices, to reduce or keep away The problem of exempting to be formerly mentioned.

Specifically, the utility model provides a kind of countryside portable gas-detecting device, can effectively reduce and is System error, improves system reliability and accuracy of detection, and can be more practical and portable.

In order to solve the above technical problems, the utility model proposes a kind of countryside portable gas-detecting device, including case Body, the babinet are provided with gas sampling unit, and the babinet is internally provided with gas separation unit, detection unit, data Acquisition and processing unit, control unit and carrier gas unit；Wherein, the gas separation unit is arranged in an independent separation In case, the separator box is provided with three air inlet pipe and three exhaust pipes of its inside of connection；Three air inlet pipe difference To be connected to the first air inlet pipe and the second air inlet pipe of the carrier gas unit, and the third air inlet of the connection gas sampling unit Pipe；Three exhaust pipes are respectively the downtake pipe and second exhaust pipe for emptying, and the connection detection unit Third exhaust pipe.

Preferably, the data acquisition and processing unit connect the detection unit by circuit.

Preferably, the carrier gas unit includes a carrier gas steel cylinder, and the carrier gas steel cylinder passes through first air inlet respectively Pipe and the second air inlet pipe provide first via carrier gas and the second road-load gas.

Preferably, the gas separation unit includes a ten-way valve being arranged inside the separator box, and described ten is logical Valve has the first to the tenth connector according to adjoining position serial number；Wherein, first connector and the 8th connector Pipeline by being provided with the first chromatographic column is connected to；Second connector is connected to the third exhaust pipe, the third row Tracheae is provided with the second chromatographic column between second connector and the detection unit；The third connector and institute State the connection of the second air inlet pipe；4th connector is connected to the 7th connector by being provided with the pipeline of quantity tube；Described Five connectors are connected to the second exhaust pipe；6th connector is connected to the third air inlet pipe；9th connection Mouth is connected to the downtake pipe；Tenth connector is connected to first air inlet pipe.

Preferably, there are one first states for the ten-way valve tool, in said first condition, first connector and institute The connection of the tenth connector is stated, second connector is connected to the third connector, the 4th connector and the described 5th Connector is connected to, and the 6th connector is connected to the 7th connector, the 8th connector and the 9th connector Connection.

Preferably, there are one the second states for the ten-way valve tool, in said second condition, first connector and institute The connection of the second connector is stated, the third connector is connected to the 4th connector, the 5th connector and the described 6th Connector is connected to, and the 7th connector is connected to the 8th connector, the 9th connector and the tenth connector Connection.

Preferably, ten-way valve tool is there are one the third state, the connection relation of the ten-way valve under the third state It is identical as the first state.

The countryside portable gas-detecting device of the utility model provides the whole knot being integrated in built in whole in babinet Structure, each structure is stably connected in babinet to be integrated, compact-sized, easy to carry and transport, is suitable for various wild environments Emergent gas analysis detection.And the gas separation unit of absolute construction can facilitate to form the highly integrated gas for facilitating exchange Analyzer, reduces the quantity of connecting pipe and the quantity of control valve improves so as to effectively reduce systematic error The reliability and accuracy of detection of system.In addition, the gas separation unit of the utility model is parsed by the first chromatographic column by after Miscellaneous peak gas retain blowback, be conducive to the raising of gas detection precision to be checked, each composition pulled open by the second chromatographic column later Corrugation pitch, improve the detection degree of different components especially microcomponent, improve accuracy of detection.

Description of the drawings

The following drawings is only intended in doing schematic illustration and explanation to the utility model, does not limit the model of the utility model It encloses.Wherein,

The knot of the countryside portable gas-detecting device of a specific embodiment according to the present utility model is shown in Fig. 1 Structure schematic diagram；

The countryside portable gas-detecting device of another specific embodiment according to the present utility model is shown in Fig. 2 Attachment structure schematic diagram；

The countryside portable gas-detecting device of another specific embodiment according to the present utility model is shown in Fig. 3 First and third state schematic diagram of gas separation unit；

The second status diagram of gas separation unit shown in Fig. 3 is shown in Fig. 4.

Specific implementation mode

For a clearer understanding of the technical features, objectives and effects of the utility model, existing control description of the drawings Specific embodiment of the present utility model.Wherein, identical component uses identical label.

Just as described in the background section, due to existing gas analyzing apparatus, such as gas chromatograph etc., structure is multiple Miscellaneous, connecting pipe and power supply and controlling cable etc. are very more, cause the stability of existing gas analyzing apparatus very poor, inconvenient In carrying.Therefore, the utility model provides a kind of countryside portable gas-detecting device, will be necessary by simplifying structure Structure integrates as possible, reduces quantity and the control of connecting pipe by reducing the number of components of piece-rate system as possible The quantity of valve improves the detection essence of gas analyzer so as to effectively reduce systematic error while improving reliability Degree, to obtain a kind of more practical countryside portable gas-detecting device.

Specifically referring to Fig. 1, the countryside portable of a specific embodiment according to the present utility model is shown The structural schematic diagram of gas-detecting device shows that the countryside portable gas-detecting device of the utility model includes babinet in figure 100, babinet 100 is provided with gas sampling unit 11, babinet 100 be internally provided with gas separation unit 12, detection unit 13, Data acquisition and processing unit 14, control unit 15 and carrier gas unit 16 and calibration unit 17；In addition, according to sampling air source The countryside portable gas-detecting device of the needs of pressure condition, the utility model can also be built-in by controlling in babinet 100 The sampling pump 18 that unit 15 controls.The outside of babinet 100 may be provided for the binding post of circumscripted power line, or will be external The binding post of power supply is replaced with convenient for the USB power supply connector (not shown)s of connection vehicle power supply, and a kind of available Feasible program.Certainly, in particularly compact portable structure, can also in babinet 100 internal battery as Emergent detection When use.

In addition, in the concrete structure of the utility model, as shown in Fig. 2, its be shown it is according to the present utility model another The attachment structure schematic diagram of the countryside portable gas-detecting device of one specific embodiment is gone back referring to Fig. 1-2 in babinet 100 The structures such as various connection data acquisitions and processing unit 14, the cable of control unit 15, solenoid valve are provided with, it is corresponding also to connect Ventilation body sample injection unit 11, gas separation unit 12, detection unit 13, carrier gas unit 16 and the gas pipeline etc. for demarcating unit 17 Structure.

In addition, the gas separation for being also built-in with absolute construction in the countryside portable gas-detecting device of the utility model is single Member 12 is arranged in an independent separator box 120, and the separator box 120 is provided with three air inlet pipe of its inside of connection 121,122,123 and three exhaust pipes 124,125,126.That is, the gas separation unit 12 being arranged in babinet 100 is designed to Independent structure is three air inlet pipe 121,122 respectively in the outside of separator box 120 only there are six the inside and outside pipeline of connection, 123 and three exhaust pipes 124,125,126, and the gas of the gas separation for being internally integrated suitable particular category of separator box 120 Be separated column, such as the separation detection of arene compound, may be used such as- 502.2 metal capillary columns and The combining form of the gas phase splitter of CP-Sil 43CB types；Or the separation detection for halogenated compound, it may be used all Such asThe combining form of -502.2 metal capillary columns and the gas phase splitter of AE.OV-1301 types.WhereinSystem The metal capillary column of row, the model of CP-Sil 43CB, the gas phase splitter that AE.OV-1301 is commercially available common type, gas Analytical performance can be inquired by various products handbook and be obtained.In addition thermostatic control can also be further set in separator box 120 Mechanism avoids indoor temperature fluctuation from interfering analysis result.

A kind of highly integrated gas analysis for facilitating exchange can be formed using the gas separation unit 12 of absolute construction Instrument, that is, for different types of gas separation detection, it can be with the knockout box 120 of prefabricated plurality of specifications, when needs pair When the gas of certain classification is analyzed, so that it may to be packed into the knockout box 120 of respective classes in babinet 100, only Need six pipelines for being connected to knockout box 120 with the internal pipeline of babinet 100 corresponding can form a kind of gas of classification Body analyzer.In fact, in specific embodiment shown in Fig. 2, there are two row's skies in fact for six pipelines of knockout box 120 Exhaust pipe 124 and 126 be it is in line go out babinet 100 outside, that is, the two pipelines 124 and 126 are integrated in gas On body separator box 120, any connector can be completely dispensed with when being packed into babinet 100, therefore replace a kind of knockout box 120 need four pipe joints just to complete.

It is corresponding, in the suitable position of babinet 100, the air inlet pipe of gas sampling unit 11 can be set and for three rows The channel that tracheae 124,125,126 is vented.In addition, according to the concrete condition of sample gas, it, can be in gas for ease of gas analysis Transition joint 111 of the setting for tentatively dehumidifying with dedusting in the air inlet pipe of body sample injection unit 11；Certainly, it is dried in air source dustless Environment can not also use transition joint 111, directly gas is filtered as the dedusting structure built in gas sampling unit 11.

That is, can be provided in whole from the countryside portable gas-detecting device that can be seen that the utility model in Fig. 1-2 The overall structure being integrated in babinet is set, each structure is stably connected in babinet to be integrated, compact-sized, easy to carry and fortune Defeated, the emergent gas analysis for being suitable for various wild environments detects.And the gas separation unit of absolute construction can facilitate to be formed The highly integrated gas analyzer for facilitating exchange reduces the quantity of connecting pipe and the quantity of control valve, so as to Effectively to reduce systematic error, the reliability and accuracy of detection of system are improved.

Further, data acquisition and processing unit 14 shown in Fig. 1-2 pass through circuit connecting detection unit 13, data Acquisition and processing unit 14 have the display screen 141 and at least one data output interface 142 of display testing result.In Fig. 1 It is particularly shown out the data output interface 142 of three USB forms, one of data output interface 142 may be set to be Suitable for installing the card reader form of storage card.Display screen 141 can be the liquid crystal display embedded in a side of babinet 100, It can also be only a video output interface, external display can be connected by way of video line.Alternatively, at another In specific embodiment, the case where can also developing according to technology, display screen 141 and data output interface 142 are merged into unification An independent interface, such as USB Type-C interfaces can connect external laptop for connecing by the interface Detection data and/or vision signal are received, has better scalability.

In addition, as shown in Fig. 2, three air inlet pipe 121,122,123 above-mentioned are respectively the first of communication with carrier gas unit 16 Air inlet pipe 121 and the second air inlet pipe 122, and connection gas sampling unit 11 and the third air inlet pipe 123 for demarcating unit 17.

In addition, aforementioned three exhaust pipes 124,125,126 are respectively the downtake pipe 124 and second exhaust for emptying The third exhaust pipe 126 of pipe 125 and communication with detection unit 13.

Further, carrier gas unit 16 may include a carrier gas steel cylinder 161 being built in babinet 100, carrier gas steel cylinder 161 provide first via carrier gas and the second road-load gas by the first air inlet pipe 121 and the second air inlet pipe 122 respectively.That is, the present embodiment Pass through built-in carrier gas steel cylinder 161, it is possible to reduce the trouble of joint connection in site gas cylinder reduces systematic error, avoids interim connection Extra calibration process later, especially suitable for the gas analysis inspection in emergency circumstances under such as release of toxic gas situation It surveys.In addition, providing two-way carrier gas by an independent carrier gas steel cylinder 161, the systems such as flow, the ingredient of different air sources mistake is avoided Difference improves accuracy of detection.Certainly, it is contemplated that the load volume of portable problem, built-in carrier gas steel cylinder 161 is limited, can also The interface in parallel with carrier gas steel cylinder 161 is set on babinet 100, is used for external other high pressures when long-time on-the-spot test Carrier gas gas cylinder.Since flow velocity and the type selection of carrier gas are affected to result, replace external carrier gas air source and need Calibration is re-started, calibration process will be further detailed below.

Further, calibration unit 17 includes a calibration steel cylinder 171 being built in babinet 100 and dynamic calibration instrument 172, third air inlet pipe 123 is connected to calibration steel cylinder 171 and dynamic calibration instrument 172 by triple valve.Likewise, the present embodiment passes through Built-in calibration steel cylinder 171, it is possible to reduce the trouble of joint connection in site gas cylinder reduces systematic error.It, can using calibration steel cylinder 171 It is quickly calibrated to execute, that is, by the way that the normal mixture body for demarcating known concentration in steel cylinder 171 is collected in quantity tube 203, Normal separation detection program is carried out, each component swarming, by quantitative datas such as peak height, peak areas, the mark with laboratory are obtained Directrix curve compares, to determine whether system mode meets formal measurement.

In addition, the dynamic calibration instrument 172 in calibration unit 17 can execute multiple spot dynamic calibration process.That is, dynamic calibration Instrument 172 is multiple spot calibration instrument, and the mixed gas of different known concentrations is allocated by dynamic calibration instrument 172, and detection obtains analysis As a result after, corresponding gas with various concentration and quantitative values (peak height or peak area) mapping will obtain multiple points, by these points It can obtain standard curve.When the general scene of taking out is detected, dynamic calibration instrument 172 can not have to be connected in babinet, and Calibration steel cylinder 171 can keep being continuously connected with state, that is, be built in babinet.It can also external great Rong if detection time is long Measure the gas cylinder of standard gas.It can only be fixed concentration to demarcate steel cylinder 171, that is, corresponding dynamic calibration instrument 172 can only be gone to obtain A point on the standard curve gone out will be seen that the working condition of instrument, so being called according to the deviation of this point and curve It is quickly calibrated or fast verification can also be called.This quickly calibrated system can test at the scene beginning or it is fast at the end of Carry out, can also be arranged daily by program periodically be executed by control system 15 1-2 times it is quickly calibrated.

In a specific embodiment, sampling pump 18 can be set in second exhaust pipe 125, for providing certain stream Dynamic pressure improves the efficiency controllability of sampling analysis convenient for the gas sampling in the case of normal pressure.In the present embodiment, it samples The problems such as terminal position in gas circuit is arranged in pump 18, and the gas circuit connection and material that sampling pump 18 itself may be brought are adsorbed, Relative to the front end for being set to gas circuit, the influence for accuracy of detection substantially reduces, therefore the present embodiment is preferably by sampling pump 18 postpositions sampling pump 18 are arranged in second exhaust pipe 125, it is possible to reduce the interference that sampling pump 18 is brought in itself, favorably In the raising of accuracy of detection.

The separative element of the countryside portable gas-detecting device of the utility model is further illustrated referring to Fig. 3-4 Concrete structure, wherein the countryside portable gas detection of another specific embodiment according to the present utility model is shown in Fig. 3 First and third state schematic diagram of the gas separation unit of device；Second of gas separation unit shown in Fig. 3 is shown in Fig. 4 Status diagram.

It is shown in figure, the separative element of the countryside portable gas-detecting device of the utility model includes that a setting is dividing From the ten-way valve 20 inside case 120, the ten-way valve 20 has the first to the tenth connector according to adjoining position serial number. Since the connector of diagram ten-way valve 20 is too many, marking specific reference numeral in figure one by one can be very chaotic, in order to become apparent from Understood, in Fig. 3 and Fig. 4 of the utility model, is carried out according to adjoining position with Arabic numerals by each connector Serial number, each Arabic numerals correspond to the connector of the Chinese serial number of same numerical value, for example, Arabic numerals 1 correspond to Connector, indicate that the first connector, 2 corresponding connector of Arabic numerals indicate in subsequent instruction in subsequent instruction Second connector, and so on.

It is shown in figure, the ten-way valve 20 of the separative element 12 of the countryside portable gas-detecting device of the utility model, First connector is connected to the 8th connector by being provided with the pipeline of the first chromatographic column 201；Second connector is vented with third Pipe 126 is connected to, and third exhaust pipe 126 is provided with the second chromatographic column 202 between the second connector and detection unit 13；The Three connectors are connected to the second air inlet pipe 122；4th connector and the 7th connector are connected by being provided with the pipeline of quantity tube 203 It is logical；5th connector is connected to second exhaust pipe 125；6th connector is connected to third air inlet pipe 123；9th connector and One exhaust pipe 124 is connected to；Tenth connector is connected to the first air inlet pipe 121.

The operating method of the countryside portable gas-detecting device of the utility model is described in detail in 1-4 with reference to the accompanying drawings, The process analyzed by operating gas, can be more clearly understood the work(of the connection structure of the separative element 12 of the utility model It can and act on.

As shown in Figs 1-4, the operating method of the countryside portable gas-detecting device of the utility model includes the following steps：

Referring first to Fig. 1 and Fig. 3, ten-way valve 20 is adjusted to by first state by control unit 15, i.e., the described ten-way valve There are one first states for 20 tools, and in the first state, the first connector is connected to the tenth connector, and the second connector connects with third Orifice, the 4th connector are connected to the 5th connector, and the 6th connector is connected to the 7th connector, the 8th connector and Nine connectors are connected to.

Then, start sampling pump 18, sample gas is acquired by gas sampling unit 11, sample gas is made to be continually fed into the Three air inlet pipe 123 subsequently into the 6th connector and enter quantity tube 203 from the 7th connector, the gas flowed out from quantity tube 203 Body is emptied after entering the 4th connector and the 5th connector by second exhaust pipe 125.By the flowing of lasting sample gas, The sample gas that required reservation amount is stored in quantity tube 203 facilitates the analysis of next step to detect.

Meanwhile the first air inlet pipe 121 is passed through by the first via carrier gas that control unit 15 makes carrier gas unit 16 provide and is continued Be passed through the tenth connector and the first connector, then pass through the first chromatographic column 201, from the first chromatographic column 201 flow out gas into Enter the 8th connector and the 9th connector, is then emptied by downtake pipe 124.

Meanwhile the second air inlet pipe 122 is passed through by the second road-load gas that control unit 15 makes carrier gas unit 16 provide and is passed through Third connector and the second connector flow through the second chromatographic column 202 by third exhaust pipe 126, later from the second chromatographic column 202 The gas of outflow empties after entering detection unit 13.

The first chromatographic column 201 and corresponding connector and pipeline are cleaned successively by using first via carrier gas, with And be vented after being cleaned successively to the second chromatographic column 202 and detection unit 13 using the second road-load gas, same air source can be utilized real Now to the cleaning of system, air source is stablized, more efficient, is conducive to subsequently obtain more accurate testing result.Until cleaning is steady After fixed, system reaches the preset state that can analyze detection in next step.

Later, after system reaches scheduled stable state, can by control unit 15 by ten-way valve 20 from Fig. 3 institutes The first state shown is adjusted to the second state shown in Fig. 4, i.e., there are one the second states for the described tool of ten-way valve 20, shown in Fig. 4 Under second state, the first connector is connected to the second connector, and third connector is connected to the 4th connector, the 5th connector with 6th connector is connected to, and the 7th connector is connected to the 8th connector, and the 9th connector is connected to the tenth connector.

At this point, by sampling pump 18 and gas sample injection unit 11, the sample gas of acquisition is continually fed into third air inlet pipe 123, it is emptied subsequently into the 6th connector and the 5th connector and from second exhaust pipe 125.This process is for keeping in pipeline Sample gas flowing, the sampling convenient for subsequent cycle is not in gas flow interruption, ensures the company of continuous on-line analysis with this Coherence, avoiding the occurrence of data jump influences accuracy of detection, while ensureing that lasting barotropic gas flowing can be to avoid outside air It is polluted into gas circuit, ensures that gas circuit stablizes cleaning, to further ensure the accuracy of analysis result.

Meanwhile the first air inlet pipe 121 is passed through by the first via carrier gas that control unit 15 makes carrier gas unit 16 provide and is continued It is passed through the tenth connector and the 9th connector, is then emptied by downtake pipe 124.Pipeline is held by carrier gas with this Continuous cleaning avoids pollution and the gas analysis of preparation next time.

Meanwhile the second air inlet pipe 122 is passed through by the second road-load gas that control unit 15 makes carrier gas unit 16 provide and is passed through Third connector and the 4th connector, then blowback enter the sample gas that quantity tube 203 will be stored therein under first state Quantity tube 203 is released, sample gas flows into the 7th connector and the 8th connector later, is equally that blowback enters the first chromatographic column 201, under the action of the first chromatographic column 201, gas with various composition is parsed with friction speed and is discharged, and the gas first parsed is passed through Then first connector and the second connector flow to the second chromatographic column 202, by the second chromatographic column by third exhaust pipe 126 It is detected into detection unit 13 after 202 separation.

Second state shown in Fig. 4 is connected with using the first chromatographic column 201 and the second chromatographic column 202 to the eye Separation detection of getting up is similar, and then, the operating procedure of the utility model is not simple separation, but needs first After chromatographic column 201 parses sample gas the time that separation is subscribed, it is switched to the subsequent third state at once.

That is, according to the characteristic of the first chromatographic column 201, the gas first parsed all emptied by the first chromatographic column 201 into Acquisition can be calculated or test by entering the time of third exhaust pipe 126, when reaching the emptying time for first parsing gas, be controlled Unit 15 automatically begins to state conversion, that is, ten-way valve 20 is adjusted to the third state from the second state by control unit 15, i.e., The tool of the ten-way valve 20 is there are one the third state, and the connection relation of ten-way valve 20 is identical as first state under the third state, such as Fig. 3 Shown, likewise, the first connector is connected to the tenth connector at this time, the second connector is connected to third connector, and the 4th connects Interface is connected to the 5th connector, and the 6th connector is connected to the 7th connector, and the 8th connector is connected to the 9th connector.

At this point, the gas first parsed has fully entered in third exhaust pipe 126, what some was first parsed Gas may have arrived at the second chromatographic column 202, and even up to (this can be by the second connector and the second color for detection unit 13 The volume of third exhaust pipe 126 between spectrum column 202 is flexibly set, and depending on the width range of target species section). Control unit 15 is switched to the third state, the gas quilt that 201 back segment of the first chromatographic column parses from the second state immediately later It blocks suddenly, not further into third exhaust pipe 126.Also that is, in the step of the utility model, in sample gas from The gas ingredients first parsed in first chromatographic column 201 are needed as under test gas, and the rear solution from the first chromatographic column 201 The gas ingredients of precipitation are useless foreign gas, and avoiding this portion gas from entering the impurity peaks generated after detection unit 13 reduces The curve precision of under test gas.

It is switched to after the third state, as shown in figure 3, by sampling pump 18 and gas sample injection unit 11, by the sample of acquisition Product gas is continually fed into third air inlet pipe 123, subsequently into the 6th connector and enters quantity tube 203 from the 7th connector, from The gas that quantity tube 203 flows out is emptied after entering the 4th connector and the 5th connector by second exhaust pipe 125；With this by Gas under two-state is all discharged, to sample gas of the storage for analyzing next time in quantity tube 203.

Meanwhile the first air inlet pipe 121 is passed through by the first via carrier gas that control unit 15 makes carrier gas unit 16 provide and is continued It is passed through the tenth connector and the first connector, then blowback enters the first chromatographic column 201.In first chromatographic column 201 originally at this time What is retained is the back segment parsing gas not yet flowed out, this part as waste gas due to slow by speed, so from the Two-state is retained down when being switched to the third state.At this point, the blowback by first via carrier gas acts on, it is originally just residual This portion gas in the first chromatographic column 201 is stayed in, can be easy to release first by way of blowback by first via carrier gas Chromatographic column 201.With continuing into for first via carrier gas, original gas revert all in the first chromatographic column 201 can be pushed away Go out, after the 8th connector and the 9th connector, is emptied by downtake pipe 124.That is, in this step, by cutting The third state is changed to, can reversely be blown clean the exhaust gas in the first chromatographic column 201 by first via carrier gas, since exhaust gas passes through The speed of first chromatographic column 201 is originally just very slow, can be faster if positive purging efficiency can be very low, and by reverse blow The first chromatographic column 201 and relevant pipe interface etc. are cleaned, cleaning efficiency higher, the time needed is shorter, purges cleaning Effect is also more much better than positive purging effect, also avoid being difficult in positive purging the parsing overlong time species purged away into Enter the detection unit 13 analyzed next time, to more reduce impurity interference, improves the accuracy of analysis result.

Further simultaneously, the second road-load gas for making carrier gas unit 16 provide by control unit 15 passes through the second air inlet pipe 121 are continually fed into third connector and the second connector, then flow into third exhaust pipe 126.In third exhaust pipe 126 at this time just It is the remaining under test gas that the leading portion being just retained down first parses well, is switched to after the third state, just by Two road-load gas relays flow into third exhaust pipes 126 and push remaining under test gas to second chromatographic column 202, be then exactly normal through Second chromatographic column 202 makes the composition under test gas continue to parse discharge with friction speed, is flowed out later from the second chromatographic column 202 Gas enter detection unit 13 detect after empty；Complete the cycle of a gas analysis in a third condition with this；Detection is single The analysis result that member 13 obtains further is acquired to data by circuit transmission and processing unit 14.

Under this step, is retained, do not had since time longer foreign gas will be parsed by the first chromatographic column 201 before Into third exhaust pipe 126, therefore really needing for the second chromatographic column 202 is pushed to by the second road-load gas and analyzes detection The under test gas of different components is parsed discharge, has pulled open gas with various by gas ingredients, the second chromatographic column 202 at different rates The interval of the curve wave crest of composition avoids adjacent peaks and mutually covers interference, improves different components especially microcomponent Detection degree, improve accuracy of detection.

In the utility model, there is no directly gone here and there by the first chromatographic column 201 and the second chromatographic column 202 sample gas Connection analysis detection, but the first chromatographic column 201 has carried out a retention operation before testing, it is right using the first chromatographic column 201 Sample gas carries out a pre-separation, and the under test gas first parsed is oriented to the second chromatographic column, is switched back segment by state Exhaust gas is trapped in the first chromatographic column 201, later exhaust gas blowback is gone out to prepare and be detected next time.Control unit 15 can basis The property settings reasonable time of first chromatographic column 201 carries out state conversion, so that it may with the under test gas of desired analysis detection Except back segment exhaust gas retention, only analyze leading portion under test gas.

In conclusion the countryside portable gas-detecting device of the utility model is provided and is integrated in babinet built in whole Overall structure, each structure is stably connected in babinet to be integrated, compact-sized, easy to carry and transport, be suitable for various open countries The emergent gas analysis of external environment detects.And the gas separation unit of absolute construction can facilitate to form highly integrated facilitate mutually The gas analyzer changed reduces the quantity of connecting pipe and the quantity of control valve, is missed so as to effectively reduce system Difference improves the reliability and accuracy of detection of system.In addition, the gas separation unit of the utility model passes through the first chromatographic column The miscellaneous peak gas of rear parsing is retained into blowback, is conducive to the raising of gas detection precision to be checked, is drawn later by the second chromatographic column The corrugation pitch for opening each composition improves the detection degree of different components especially microcomponent, improves accuracy of detection.

It will be appreciated by those skilled in the art that although the utility model is described in the way of multiple embodiments , but not each embodiment only contains an independent technical solution.So narration is just for the sake of clear in specification For the sake of, the skilled in the art should refer to the specification as a whole is understood, and by skill involved in each embodiment Art scheme, which is regarded as, can be combined with each other into the mode of different embodiments to understand the scope of protection of the utility model.

The above descriptions are merely exemplary embodiments of the present utility model, is not limited to the model of the utility model It encloses.Any those skilled in the art, under the premise of not departing from the design and principle of the utility model made by equivalent variations, Modification and combination, should all belong to the range of the utility model protection.

Claims (7)

1. a kind of countryside portable gas-detecting device, including babinet (100), which is characterized in that the babinet (100) is provided with Gas sampling unit (11), the babinet (100) are internally provided with gas separation unit (12), detection unit (13), data Acquisition and processing unit (14), control unit (15) and carrier gas unit (16)；Wherein, gas separation unit (12) setting In an independent separator box (120), the separator box (120) be provided with connection its internal three air inlet pipe (121, 122,123) and three exhaust pipes (124,125,126)；Three air inlet pipe (121,122,123) are respectively described in connection The first air inlet pipe (121) and the second air inlet pipe (122) of carrier gas unit (16), and the connection gas sampling unit (11) Third air inlet pipe (123)；Three exhaust pipes (124,125,126) be respectively for emptying downtake pipe (124) and Second exhaust pipe (125), and it is connected to the third exhaust pipe (126) of the detection unit (13).

2. countryside portable gas-detecting device as described in claim 1, which is characterized in that the data acquisition and processing are single First (14) connect the detection unit (13) by circuit.

3. countryside portable gas-detecting device as claimed in claim 2, which is characterized in that the carrier gas unit (16) includes One carrier gas steel cylinder (161), the carrier gas steel cylinder (161) pass through first air inlet pipe (121) and the second air inlet pipe respectively (122) first via carrier gas and the second road-load gas are provided.

4. countryside portable gas-detecting device as claimed in claim 3, which is characterized in that the gas separation unit (12) Including the setting ten-way valve (20) internal in the separator box (120), the ten-way valve (20) has according to adjoining position First to the tenth connector of serial number；Wherein, first connector and the 8th connector are by being provided with the first chromatography The pipeline of column (201) is connected to；Second connector is connected to the third exhaust pipe (126), the third exhaust pipe (126) The second chromatographic column (202) being provided between second connector and the detection unit (13)；The third connection Mouth is connected to second air inlet pipe (122)；4th connector and the 7th connector are by being provided with quantity tube (203) Pipeline is connected to；5th connector is connected to the second exhaust pipe (125)；6th connector and the third air inlet Manage (123) connection；9th connector is connected to the downtake pipe (124)；Tenth connector and described first Air inlet pipe (121) is connected to.

5. countryside portable gas-detecting device as claimed in claim 4, which is characterized in that the ten-way valve (20) has one A first state, in said first condition, first connector are connected to the tenth connector, second connector Be connected to the third connector, the 4th connector is connected to the 5th connector, the 6th connector with it is described 7th connector is connected to, and the 8th connector is connected to the 9th connector.

6. countryside portable gas-detecting device as claimed in claim 5, which is characterized in that the ten-way valve (20) has one A second state, in said second condition, first connector are connected to second connector, the third connector Be connected to the 4th connector, the 5th connector is connected to the 6th connector, the 7th connector with it is described 8th connector is connected to, and the 9th connector is connected to the tenth connector.

7. countryside portable gas-detecting device as claimed in claim 6, which is characterized in that the ten-way valve (20) has one A third state, the connection relation of the ten-way valve (20) is identical as the first state under the third state.