CN109164837A - Flow constant device and its application method, quick analytic instrument device and its detection method - Google Patents
Flow constant device and its application method, quick analytic instrument device and its detection method Download PDFInfo
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- CN109164837A CN109164837A CN201810914695.2A CN201810914695A CN109164837A CN 109164837 A CN109164837 A CN 109164837A CN 201810914695 A CN201810914695 A CN 201810914695A CN 109164837 A CN109164837 A CN 109164837A
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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Abstract
The invention discloses a kind of flow constant device and its application methods, quick analytic instrument device and its detection method, flow constant device, including air guide channel and air pump, air guide channel is for importing ambient atmos, the drivable access air guide channel of air pump, air guide channel is equipped with pressure sensor, pressure sensor is used to detect the pressure of air guide channel inner chamber gas, pressure sensor and air pump are provided with the first regulating device between being drivingly connected, first regulating device is used to control the on-off of air guide channel, the output end of air pump is connected with interface channel, the output end of interface channel is equipped with Liqiud-gas mixing device, mixing arrangement is used to receive the gas of air pump output.Pressure sensor and under test gas use contactless design in flow constant device of the invention, effectively avoid interference of the under test gas to pressure sensor, so that air pump exports constant gas amount.
Description
Technical field
The present invention relates to environmental analysis fields, particularly, are related to a kind of flow constant device and its application method.In addition,
The invention further relates to a kind of quick analytic instrument device and its detection method including above-mentioned flow constant device.
Background technique
Constituent part in environment on-line analysis test sample needs to separate component to be measured with matrix (water body), with gas
State form is detected.In detection process, the size of tolerance directly affects the separative efficiency and disengaging time of component to be measured, therefore
Tolerance is necessary for constant current.Constant current measure mainly has constant pressure and constant flow rate.Artificial flow measurement is used with spinner flowmeter
Based on flow rate-measuring device；Automation flow measurement use the measurement device for being converted into flow in a manner of pressure to survey, and draws difference
Flow curve under pressure condition gives driving motor feedback analog amount signal, realizes the control of revolving speed by the adjusting of pressure,
Constant flow rate needed for obtaining.Piezometry usually uses pressure sensor, the measurement and control skill of the gas single for composition
Art is highly developed.But for complex in composition, such as wet, the biggish gas of water content, pass through pressure sensor measurement pressure
After power, the mode of analog signal control motor speed is converted to, effective performance is caused to export tolerance not by large effect
Accurately, the precision of analysis instrument detection is directly affected.
Analysis instrument is blown using air pump into solution, and a small amount of water in the part in solution can be by gas band in the form of aqueous vapor
Out, the accuracy of measurement is influenced.On the one hand, a certain amount of aqueous vapor is contained in gas, aqueous vapor forms droplet in pressure sensor,
Pressure value can be changed, cause stress erroneous judgement, lead to the pressure inaccuracy of air pump output gas.It blows especially for needing to recycle
Equipment, a large amount of water-gas circulation, pressure sensor can not obtain exact value.On the other hand, there is certain abrasion in air pump itself,
Constant gas source can not be provided.If constant air pump tolerance need to be obtained, timing is needed to calibrate air pump tolerance.
Summary of the invention
The present invention provides a kind of flow constant device and its application method, quick analytic instrument device and its detection method, with
It solves the aqueous vapor that wet or water content is carried compared with atmospheric to interfere pressure sensor, leads to air pump output tolerance inaccuracy
The technical issues of.
A kind of flow constant device, including air guide channel and air pump, for importing ambient atmos, air pump can drive air guide channel
Dynamic access air guide channel, air guide channel are equipped with pressure sensor, and pressure sensor is for detecting air guide channel inner chamber gas
Pressure, pressure sensor and air pump be drivingly connected between be provided with the first regulating device, the first regulating device is led for controlling
The on-off in gas channel, the output end of air pump are connected with interface channel, and the output end of interface channel is equipped with Liqiud-gas mixing device, mixing dress
Set the gas for receiving air pump output.
Further, flow constant device further includes processing unit, and processing unit is on the arrival end of air guide channel simultaneously
For to extraneous gas dry, purification.
Further, flow constant device further includes detection device, and detection device is for analyzing Liqiud-gas mixing device release
Gas componant；The gas output end of Liqiud-gas mixing device is pumped to detection device by air pump and is detected.
Further, flow constant device further includes circulation canal, and the gas that circulation canal is in Liqiud-gas mixing device is defeated
Outlet；The output end of circulation canal is equipped with the second regulating device, is used for control loop channel on-off, and circulation canal is connected to air pump
Gas input.
Further, flow constant device further includes detection device, and detection device is for analyzing Liqiud-gas mixing device release
Gas componant；Detection device is laid on circulation canal and/or on interface channel.
Further, circulation canal is using in U-shaped channel, V-arrangement channel, S-shaped channel, W-shaped channel or zigzag channel
It is at least one；Second regulating device is using at least one of pneumatic operated valve, motor-driven valve, solenoid valve and hand-operated valve.
Further, detection device is at least one, and multiple detection devices is connected in parallel；Detection device is single using detection
Member；Alternatively, detection device uses chromatography pole unit and detection unit.
Further, flow constant device for analyze nitrogen, sulfur dioxide, nitric oxide, nitrogen dioxide, arsenic hydride and
At least one of hydrogen cyanide；First regulating device is using at least one of pneumatic operated valve, motor-driven valve, solenoid valve and hand-operated valve.
Further, Liqiud-gas mixing device uses gas-liquid mixed pond；Gas-liquid mixed pond includes inlet end, and inlet end is in gas
Liquid mixing pit bottom end；Gas-liquid mixed pond includes outlet side, and outlet side is in gas-liquid mixed pond upper end；Gas-liquid mixed pond includes feed liquor
Mouth and leakage fluid dram, leakage fluid dram are in gas-liquid mixed bottom of pond portion.
Further, gas-liquid mixed pond is equipped with the temperature-adjusting device for being heated or cooled；Gas-liquid mixed pond use side
Just the transparent gas-liquid mixed pond of gas current intelligence and liquid water level is observed；Liquid height is gas-liquid mixed pond in gas-liquid mixed pond
The 2/3 of height.
According to another aspect of the present invention, a kind of application method of flow constant device is additionally provided, comprising the following steps:
The first regulating device for controlling air guide channel on-off is opened, ambient atmos enter air guide channel, open air pump and for examining
The pressure sensor of air guide channel inner chamber gas pressure is surveyed, pressure sensor will test the pressure value conversion of air guide channel inner cavity
The flow curve under the conditions of different pressures is drawn, by the adjusting of pressure, to the driving motor feedback analog signal of air pump, control
The revolving speed of air pump, so that air pump exports constant gas；The first regulating device is closed, the constant gas that air pump exports is passed through into connection
Channel is passed into Liqiud-gas mixing device, comes into full contact with the liquid contained in Liqiud-gas mixing device.
It further, further include that ambient atmos are entered in processing unit by air guide channel and are dried, purify；Further include
Determine the air pump calibration before air pump output gas is constant；Air pump calibration is monitored according to the pressure value of pressure sensor
The working condition of air pump.
According to another aspect of the present invention, a kind of quick analytic instrument device is additionally provided, including above-mentioned flow constant device.
According to another aspect of the present invention, a kind of detection method of quick analytic instrument device is additionally provided, comprising the following steps:
The first regulating device for controlling air guide channel on-off is opened, ambient atmos enter air guide channel, open air pump and for examining
The pressure sensor of air guide channel inner chamber gas pressure is surveyed, pressure sensor will test the pressure value conversion of air guide channel inner cavity
The flow curve under the conditions of different pressures is drawn, by the adjusting of pressure, to the driving motor feedback analog signal of air pump, control
The revolving speed of air pump, so that air pump exports constant gas；The first regulating device is closed, the constant gas that air pump exports is passed through into connection
Channel is passed into Liqiud-gas mixing device, comes into full contact with the liquid contained in Liqiud-gas mixing device, the gas that mixing arrangement is discharged
Body is passed into detection device analysis.
According to another aspect of the present invention, a kind of detection method of quick analytic instrument device is additionally provided, comprising the following steps:
The first regulating device for controlling air guide channel on-off is opened, closes and adjusts dress for the second of control loop channel on-off
It sets, ambient atmos enter air guide channel, open air pump and the pressure sensor for detecting air guide channel inner chamber gas pressure, pressure
The flow curve under the conditions of different pressures is drawn in the pressure value conversion that force snesor will test air guide channel inner cavity, passes through pressure
Adjusting control the revolving speed of air pump to the driving motor feedback analog signal of air pump so that air pump export constant gas；It closes
First regulating device opens the second regulating device, and the constant gas that air pump exports is passed into gas-liquid mixed by interface channel
The liquid contained in device, with Liqiud-gas mixing device comes into full contact with, and the gas that mixing arrangement discharges is entered circulation canal, is conveyed
It is analyzed to detection device, gas recovery to air pump.
The invention has the following advantages:
Flow constant device of the invention, including air guide channel, pressure sensor, the first regulating device, air pump, gas-liquid are mixed
It attaches together and sets and interface channel, it is simple and compact for structure, it is easy to operate.Ambient atmos enter from air guide channel, pass through pressure sensing
Device, air pump are into Liqiud-gas mixing device.Pressure sensor will test the conversion of the pressure value in air guide channel and draw different pressures
Under the conditions of flow curve the control of air pump revolving speed to the driving motor feedback analog signal of air pump, is realized by the adjusting of pressure
System, realizes constant air pump tolerance；First regulating device closes air guide channel, air pump continued for constant output gas.First is adjusted
Device effectively completely cuts off the circulation of the gas between pressure sensor and air pump, effectively under test gas is avoided to do pressure sensor
It disturbs.Also, pressure sensor can accurately determine whether air pump is in normal working condition.Pressure passes in flow constant device
Sensor and under test gas use contactless design, avoid the erroneous judgement of pressure sensor, accurate to guarantee that air pump exports constant gas
Amount.The service life of flow constant device, save the cost can also be extended with the contactless design of under test gas.
Quick analytic instrument device of the invention, including flow constant device, in flow constant device pressure sensor with it is to be measured
Online quick and precisely detection gas ingredient is realized in the contactless design of gas.Quick analytic instrument device structure is simple, easy to operate,
Automatic detection mode can be used, save labour turnover.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to accompanying drawings, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow constant device schematic diagram of the preferred embodiment of the present invention；And
Fig. 2 is the flow constant device schematic diagram containing circulation canal of the preferred embodiment of the present invention.
Description of symbols:
1, processing unit；2, air guide channel；3, pressure sensor；4, the first regulating device；5, air pump；6, gas-liquid mixed fills
It sets；7, circulation canal；8, the second regulating device；9, interface channel.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Fig. 1 is the flow constant device schematic diagram of the preferred embodiment of the present invention；Fig. 2 is containing for the preferred embodiment of the present invention
The flow constant device schematic diagram of circulation canal.
As shown in Figure 1, the flow constant device of the present embodiment, including air guide channel 2 and air pump 5, air guide channel 2 is for leading
Enter ambient atmos, the drivable access air guide channel 2 of air pump 5, air guide channel 2 is equipped with pressure sensor 3, pressure sensor 3
For detecting the pressure of 2 inner chamber gas of air guide channel, the first adjusting is provided between pressure sensor 3 and the drive connection of air pump 5
Device 4, the first regulating device 4 are used to control the on-off of air guide channel 2, and the output end of air pump 5 is connected with interface channel 9, and connection is logical
The output end in road 9 is equipped with Liqiud-gas mixing device 6, and Liqiud-gas mixing device 6 is used to receive the gas of the output of air pump 5.Stream of the invention
Measure constant device, including air guide channel 2, pressure sensor 3, the first regulating device 4, air pump 5, Liqiud-gas mixing device 6 and connection
Channel 9, it is simple and compact for structure, it is easy to operate.Ambient atmos from air guide channel enter, by pressure sensor 3, air pump 5 to
In Liqiud-gas mixing device 6.Pressure sensor 3 will test under the conditions of the conversion drafting different pressures of the pressure value in air guide channel 2
Flow curve the control of 5 revolving speed of air pump to the driving motor feedback analog signal of air pump 5, is realized by the adjusting of pressure,
Realize constant air pump tolerance；First regulating device 4 closes air guide channel, 5 continued for constant output gas of air pump.First adjusts dress
The gas set between 4 effective isolation pressure sensors 3 and air pump 5 circulates, and effectively avoids under test gas to pressure sensor 3
Interference.Also, whether pressure sensor 3 can accurately determine air pump 5 in normal working condition.It is pressed in flow constant device
Force snesor 3 and under test gas use contactless design, avoid the erroneous judgement of pressure sensor 3, accurate to guarantee that air pump 5 exports perseverance
Determine gas flow.The service life of flow constant device, save the cost can also be extended with the contactless design of under test gas.
As shown in Figure 1, flow constant device further includes processing unit 1 in the present embodiment, processing unit 1 is logical in air guide
On the arrival end in road 2 and for extraneous gas dry, purification.Above-mentioned processing unit 1 is improved through air in air guide channel 2
The degree of purity of composition promotes the stability of output tolerance, improves detection accuracy.Also ambient atmos is avoided to be passed through gas-liquid mixed dress
6 are set, certain ingredients of ambient atmos are reacted with testing liquid, influence the accuracy of detection.
As shown in Figure 1, flow constant device further includes detection device, and detection device is for analyzing gas-liquid in the present embodiment
The gas componant that mixing arrangement 6 discharges.The gas output end of Liqiud-gas mixing device 6 is pumped to detection device progress by air pump 5
Detection.Above-mentioned detection device is used to detect the gas of the release of Liqiud-gas mixing device 6, is passed according to detection gas amount design alternative pressure
The range of pressure values of sensor 3 or the accuracy class for selecting pressure sensor 3.
As shown in Fig. 2, flow constant device further includes circulation canal 7 in the present embodiment, circulation canal 7 is mixed in gas-liquid
Attach together set 6 gas output end.The output end of circulation canal 7 is equipped with the second regulating device 8, is used for 7 on-off of control loop channel,
Circulation canal 7 is connected to the gas input of air pump 5.The setting of above-mentioned circulation canal 7, so that Liqiud-gas mixing device 6 discharged
Gas forms closed pipeline, and the second regulating device 8 opens circulation canal 7, and the first regulating device 4 closes air guide channel 2, so that
Circulation canal 7 and air pump 5, interface channel 9 and Liqiud-gas mixing device 6 form closed pipeline, guarantee gas tightness.It is suitable for
The recycling of toxic gas prevents from being discharged into atmosphere and pollutes environment.
As shown in Fig. 2, flow constant device further includes detection device, and detection device is for analyzing gas-liquid in the present embodiment
The gas componant that mixing arrangement 6 discharges.Detection device is laid on circulation canal 7 and/or on interface channel 9.Above-mentioned gas-liquid is mixed
It attaches together and sets the gas of 6 releases and enter in circulation closed pipeline, internal gas is constant, and detection device can be set in circulation closed
Any position in pipeline.
In the present embodiment, circulation canal 7 is using in U-shaped channel, V-arrangement channel, S-shaped channel, W-shaped channel or zigzag channel
At least one.Second regulating device 8 is using at least one of pneumatic operated valve, motor-driven valve, solenoid valve and hand-operated valve.Above-mentioned circulation
Channel 7 is connected to the output end of mixing arrangement 6, and the gas of release can contain aqueous vapor or gas suspension, and circulation canal 7 uses U
Shape channel, V-arrangement channel, S-shaped channel, W-shaped channel or zigzag channel, increase the travel path of gas, and the aqueous vapor being carried over is pre-
Cold formation drop is back in mixing arrangement 6, reduces pollution of the aqueous vapor to air pump 5,5 performance of air pump is avoided to decline, extend air pump 5
Service life.Optionally, circulation canal 7 is provided with cooling device, accelerates the cooling for reflux of aqueous vapor.
As shown in Fig. 2, detection device is at least one, and multiple detection devices is connected in parallel in the present embodiment.It is above-mentioned can
Multiple detection devices are arranged, detection device is connected in parallel, and is realized that multiple gases detect simultaneously, is kept liquid to be detected sample
Identity improves detection efficiency and accuracy.Optionally, detection device uses detection unit；Alternatively, detection device uses chromatography
Pole unit and detection unit.The gas that above-mentioned Liqiud-gas mixing device 6 discharges contains impurity, and purity is low to will affect detection effect.Color
Gas purity can be improved in spectrum pole unit, reaches examination criteria, improves detection sensitivity.
As depicted in figs. 1 and 2, in the present embodiment, flow constant device for analyze nitrogen, sulfur dioxide, nitric oxide,
At least one of nitrogen dioxide, arsenic hydride and hydrogen cyanide.First regulating device 4 is using pneumatic operated valve, motor-driven valve, solenoid valve and hand
At least one of dynamic valve.Flow constant device is suitable for measurement analysis nitrogen, sulfur dioxide, nitric oxide, nitrogen dioxide, arsenic
Change hydrogen and hydrogen cyanide, the scope of application are wider.When analyzing toxic gas, need using circulation canal 7, cycling and reutilization avoids
Pollute air.
As depicted in figs. 1 and 2, in the present embodiment, Liqiud-gas mixing device 6 uses gas-liquid mixed pond.Above-mentioned gas-liquid mixed dress
It sets 6 and uses gas-liquid mixed pond, gas-liquid mixed pond can contain strong acid, highly basic, have corrosive liquid, and the scope of application is wider, liquid
Body is stabilized in gas-liquid mixed pond.Optionally, gas-liquid mixed pond includes inlet end, and inlet end is in gas-liquid mixed bottom of pond
End.Gas-liquid mixed pond includes outlet side, and outlet side is in gas-liquid mixed pond upper end.Gas-liquid mixed pond includes inlet and drain
Mouthful, leakage fluid dram is in gas-liquid mixed bottom of pond portion.Gas is input to gas-liquid mixed bottom of pond end, gas by interface channel 9 by air pump 5
The liquid being passed into gas-liquid mixed pond completely is conducive to the complete of under test gas so that gas contacts to the greatest extent with liquid
Full release, guarantees the accuracy of inspection side.Gas is discharged from liquid level upper end, the outlet side of gas-liquid mixed pond upper end and circulation canal 7
Connection, forms closed access, effective to reduce harmful, etchant gas discharge.Inlet and leakage fluid dram facilitate liquid into
Enter gas-liquid mixed pond and discharge gas-liquid mixed pond, is not necessarily to each device of provision for disengagement, influences the air-tightness of flow constant device.Into
The setting of sample mouth and leakage fluid dram can continuously replace testing liquid, realize automated continuous operation, improve detection efficiency.
As depicted in figs. 1 and 2, in the present embodiment, gas-liquid mixed pond is equipped with the temperature-adjusting device for being heated or cooled.
Gas-liquid mixed pond is equipped with temperature-adjusting device, can be carried out optimum according to the physicochemical property of release gas and testing liquid
Temperature is adjusted, and accelerates the release of gas.Optionally, gas-liquid mixed pond is using facilitating observation gas current intelligence and liquid water level
Transparent gas-liquid mixed pond.Above-mentioned transparent gas-liquid mixed pond, can observe level condition, liquid is avoided to overflow.It is also possible to see
The case where examining bubble in liquid determines whether 5 output gas amount of air pump is constant.Optionally, liquid height is in gas-liquid mixed pond
The 2/3 of gas-liquid mixed pond height.Suitable liquid level can make the aqueous vapor reflux of volatilization, subsequent aqueous vapor is avoided to handle
Work and the accuracy for influencing testing result.
The inventive concept total as one, the present invention also provides a kind of application methods of flow constant device, including with
Lower step: opening the first regulating device 4 for controlling 2 on-off of air guide channel, and ambient atmos enter air guide channel 2, opens gas
Pump 5 and the pressure sensor 3 for detecting 2 inner chamber gas pressure of air guide channel, pressure sensor 3 will test air guide channel 2
The flow curve under the conditions of different pressures is drawn in the pressure value conversion of inner cavity, by the adjusting of pressure, to the driving motor of air pump 5
Feedback analog signal controls the revolving speed of air pump 5, so that air pump exports constant gas；The first regulating device 4 is closed, air pump 5 is defeated
Constant gas out is passed into Liqiud-gas mixing device 6 by interface channel 9, abundant with the liquid that contains in Liqiud-gas mixing device 6
Contact.Above-mentioned flow constant device includes that air pump 5, pressure sensor 3, the first regulating device 4, Liqiud-gas mixing device 6, air guide are logical
Road 2 and interface channel 9, it is simple and compact for structure, it is easy for assemble or unload.Pressure sensor 3 and gas to be measured in flow constant device
Body uses contactless design, avoids the erroneous judgement of pressure sensor 3, the accurate output constant gas amount for guaranteeing air pump 5.
It further include that ambient atmos are entered in processing unit by air guide channel and done as shown in Figure 1, in the present embodiment
Dry, purification.The degree of purity by air composition in air guide channel 2 is improved, the stability of output tolerance is promoted, improves detection
Precision.
As shown in Figure 1, further including 5 calibration of air pump before determining air pump output gas is constant in the present embodiment；Gas
Pump working condition of 5 calibrations according to the pressure value monitoring air pump 5 of pressure sensor 3.
Specific steps are as follows: the first regulating device 4 is opened, ambient atmos are entered by air guide channel 2, air pump 5 is opened, so that
Gas is by pressure sensor 3, air pump 5, interface channel 9 and Liqiud-gas mixing device 6, the gas that delivery flow constant device retains
Body, cracking pressure sensor 3 calibrate air pump 5, calibrate qualified air pump 5, and the air inflow of ambient atmos is equal to logical at this time
The gas flow of Liqiud-gas mixing device 6 is crossed, the pressure value conversion that pressure sensor 3 will test 2 inner cavity of air guide channel is drawn different
Flow curve under pressure condition controls air pump 5 to the driving motor feedback analog signal of air pump 5 by the adjusting of pressure
Revolving speed, so that air pump 5 exports constant gas；
The first regulating device 4 is closed, the constant gas that air pump 5 exports is passed into gas-liquid mixed dress by interface channel 9
6 are set, until whole cycle flow constant device stops output gas, it is defeated that next cycle readjusts air pump 5 according to the above process
Gas flow out, it is ensured that air pump 5 exports constant gas amount in the course of work in each period.
The inventive concept total as one, the present invention also provides a kind of quick analytic instrument device, including above-mentioned flow are constant
Device.Quick analytic instrument device of the invention, including flow constant device, pressure sensor 3 and gas to be measured in flow constant device
Online quick and precisely detection gas ingredient is realized in the contactless design of body.Quick analytic instrument device structure is simple, easy to operate, can
Using automatic detection mode, save labour turnover.
The inventive concept total as one, the present invention also provides a kind of detection methods of quick analytic instrument device, including with
Lower step: opening the first regulating device 4 for controlling 2 on-off of air guide channel, and ambient atmos enter air guide channel 2, opens gas
Pump 5 and the pressure sensor 3 for detecting 2 inner chamber gas pressure of air guide channel, pressure sensor 3 will test air guide channel 2
The flow curve under the conditions of different pressures is drawn in the pressure value conversion of inner cavity, by the adjusting of pressure, to the driving motor of air pump 5
Feedback analog signal controls the revolving speed of air pump 5, so that air pump exports constant gas；The first regulating device 4 is closed, air pump 5 is defeated
Constant gas out is passed into Liqiud-gas mixing device 6 by interface channel 9, abundant with the liquid that contains in Liqiud-gas mixing device 6
The gas that mixing arrangement 6 discharges is passed into detection device analysis by contact.The detection method operation side of above-mentioned quick analytic instrument device
Just, contactless design is realized by the opening and closing of the first regulating device 4, pressure sensor 3 and under test gas, avoids pressing
Force snesor 3 is influenced to cause to judge by accident by under test gas, guarantees that air pump 5 exports constant gas amount, Liqiud-gas mixing device 6 discharges gas
Body is constant, effectively improves detection means measure accuracy.
The inventive concept total as one, the present invention also provides a kind of detection methods of quick analytic instrument device, including with
Lower step: opening the first regulating device 4 for controlling 2 on-off of air guide channel, closes for 7 on-off of control loop channel
Two regulating devices 8, ambient atmos enter air guide channel 2, open air pump 5 and for detecting 2 inner chamber gas pressure of air guide channel
Pressure sensor 3, the pressure value conversion that pressure sensor 3 will test 2 inner cavity of air guide channel are drawn under the conditions of different pressures
Flow curve is controlled the revolving speed of air pump 5, makes to bring about the desired sensation by the adjusting of pressure to the driving motor feedback analog signal of air pump 5
Pump output constant gas；The first regulating device 4 is closed, the second regulating device 8 is opened, the constant gas that air pump 5 exports is passed through
Interface channel 9 is passed into Liqiud-gas mixing device 6, comes into full contact with the liquid contained in Liqiud-gas mixing device 6, by mixing arrangement 6
The gas of release enters circulation canal 7, is delivered to detection device and is analyzed, gas recovery to air pump 5.Double tune of above-mentioned setting
Regulating device effectively avoids pressure sensor 3 from contacting under test gas, and forms closed return line by circulation canal 7,
It avoids polluting environment outside gas discharge quick analytic instrument device.
Specific steps are as follows: open the first regulating device 4, close the second regulating device 8, ambient atmos pass through air guide channel 2
Into unlatching air pump 5, so that the gas by desiccant passes through pressure sensor 3, air pump 5, interface channel 9 and gas-liquid mixed
Device 6, the gas that delivery flow constant device retains, cracking pressure sensor 3 calibrate air pump 5, calibrate qualified gas
Pump 5, the air inflow of ambient atmos is equal to the gas flow by Liqiud-gas mixing device 6 at this time, and pressure sensor 3 will test air guide
The flow curve under the conditions of different pressures is drawn in the pressure value conversion of 2 inner cavity of channel, by the adjusting of pressure, to the drive of air pump 5
Dynamic motor feedback analog signal, controls the revolving speed of air pump 5, so that air pump exports constant gas；
The first regulating device 4 is closed, the second regulating device 8 is opened, the constant gas that air pump 5 exports is passed through into interface channel
9 are passed into Liqiud-gas mixing device 6, and the gas that liquid mixing arrangement 6 discharges is absorbed by circulation canal 7, defeated into circulation canal 7
It send to detection device and is detected, detection device first carries out chromatographic column unit purifying, enters back into detection unit detection and analysis, recycling
The gas of detection is to air pump 5.Next cycle readjusts 5 output gas amount of air pump according to the above process, it is ensured that each week
Air pump 5 exports constant gas amount in the course of work of phase.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of flow constant device, which is characterized in that
Including air guide channel (2) and air pump (5), for importing ambient atmos, the air pump (5) can drive the air guide channel (2)
The dynamic access air guide channel (2),
The air guide channel (2) is equipped with pressure sensor (3), and the pressure sensor (3) is for detecting the air guide channel
(2) pressure of inner chamber gas, the pressure sensor (3) and the air pump (5) are provided with the first adjusting dress between being drivingly connected
It sets (4), first regulating device (4) is used to control the on-off of the air guide channel (2),
The output end of the air pump (5) is connected with interface channel (9), and the output end of the interface channel (9) is filled equipped with gas-liquid mixed
It sets (6), the mixing arrangement (6) is used to receive the gas of the air pump (5) output.
2. flow constant device according to claim 1, which is characterized in that
The flow constant device further includes processing unit (1), and the processing unit (1) is in the arrival end of air guide channel (2)
It goes up and is used for extraneous gas dry, purification.
3. flow constant device according to claim 1, which is characterized in that
The flow constant device further includes detection device, and the detection device is released for analyzing the Liqiud-gas mixing device (6)
The gas componant put；
The gas output end of the Liqiud-gas mixing device (6) is pumped to the detection device by the air pump (5) and is detected.
4. flow constant device according to claim 1, which is characterized in that
The flow constant device further includes circulation canal (7), and the circulation canal (7) is in the Liqiud-gas mixing device (6)
Gas output end；
The output end of the circulation canal (7) is equipped with the second regulating device (8), for controlling the circulation canal (7) on-off, institute
State the gas input that circulation canal (7) is connected to the air pump (5).
5. flow constant device according to claim 4, which is characterized in that
The flow constant device further includes detection device, and the detection device is released for analyzing the Liqiud-gas mixing device (6)
The gas componant put；
The detection device is laid on the circulation canal (7) and/or on interface channel (9).
6. a kind of application method of flow constant device, which is characterized in that include the following steps
The first regulating device (4) for controlling air guide channel (2) on-off is opened, ambient atmos enter air guide channel (2), open
Air pump (5) and pressure sensor (3) for detecting air guide channel (2) inner chamber gas pressure, pressure sensor (3) will test
The flow curve under the conditions of different pressures is drawn in the pressure value conversion of air guide channel (2) inner cavity, by the adjusting of pressure, to described
The driving motor feedback analog signal of air pump (5), controls the revolving speed of the air pump (5), so that the air pump exports constant gas；
First regulating device (4) is closed, the constant gas of the air pump (5) output is passed by interface channel (9)
Liqiud-gas mixing device (6) comes into full contact with the liquid contained in the Liqiud-gas mixing device (6).
7. the application method of flow constant device according to claim 6, which is characterized in that
To further include ambient atmos entered in processing unit (1) by air guide channel (2) is dried, purifies；
It further include the air pump (5) calibration before the determining air pump (5) output gas is constant；
Air pump (5) calibration monitors the work shape of the air pump (5) according to the pressure value of the pressure sensor (3)
State.
8. a kind of quick analytic instrument device, which is characterized in that including flow constant device described in any one of claims 1 to 5.
9. a kind of detection method of quick analytic instrument device, which comprises the following steps:
The first regulating device (4) for controlling air guide channel (2) on-off is opened, ambient atmos enter air guide channel (2), open
Air pump (5) and pressure sensor (3) for detecting air guide channel (2) inner chamber gas pressure, pressure sensor (3) will test
The flow curve under the conditions of different pressures is drawn in the pressure value conversion of air guide channel (2) inner cavity, by the adjusting of pressure, to described
The driving motor feedback analog signal of air pump (5), controls the revolving speed of the air pump (5), so that the air pump exports constant gas；
First regulating device (4) is closed, the constant gas of the air pump (5) output is passed by interface channel (9)
Liqiud-gas mixing device (6) comes into full contact with the liquid contained in the Liqiud-gas mixing device (6), the mixing arrangement (6) is released
The gas put is passed into detection device analysis.
10. a kind of detection method of quick analytic instrument device, which comprises the following steps:
The first regulating device (4) for controlling air guide channel (2) on-off is opened, closes and is used for control loop channel (7) on-off
The second regulating device (8), ambient atmos enter air guide channel (2), open air pump (5) and for detecting in air guide channel (2)
The pressure sensor (3) of chamber gas pressure, the pressure value conversion that pressure sensor (3) will test air guide channel (2) inner cavity are drawn
Flow curve under the conditions of different pressures processed is believed by the adjusting of pressure to the driving motor feedback analog of the air pump (5)
Number, the revolving speed of the air pump (5) is controlled, so that the air pump exports constant gas；
First regulating device (4) is closed, second regulating device (8) is opened, the constant gas that the air pump (5) are exported
Body is passed into Liqiud-gas mixing device (6) by interface channel (9), abundant with the liquid of splendid attire in the Liqiud-gas mixing device (6)
The gas of the mixing arrangement (6) release is entered the circulation canal (7), is delivered to detection device and is analyzed, returned by contact
Getter body is to the air pump (5).
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