CN207667584U - A kind of controllable air distribution system of mixed gas suitable for tun - Google Patents
A kind of controllable air distribution system of mixed gas suitable for tun Download PDFInfo
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- CN207667584U CN207667584U CN201721352693.6U CN201721352693U CN207667584U CN 207667584 U CN207667584 U CN 207667584U CN 201721352693 U CN201721352693 U CN 201721352693U CN 207667584 U CN207667584 U CN 207667584U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides a kind of controllable air distribution system of the mixed gas suitable for tun, including PLC controller, with the host computer of PLC controller communication connection, the oxygen distribution subsystem being electrically connected with PLC controller, inert gas distribution subsystem, switch valve module, gas pre-mixed and device, the main blend tank of gas, oxygen distribution compensating unit and inert gas distribution compensating unit, oxygen and inert gas distribution subsystem are connect with gas pre-mixed and device, gas pre-mixed and device is connect by switching valve module with the main blend tank of gas, oxygen and inert gas distribution compensating unit and the pipeline connection close to the main blend tank of gas.This system realizes automation control and intelligent adjusting during distribution, allocation ratio precision is high, execute-in-place is safe, the time for saving pre-mix stage improves the air distribution efficiency of whole system, especially for the main blend tank of gas volume it is larger when be applicable in very much, the distribution company especially suitable for profession or large-scale distribution website.
Description
Technical field
The utility model is related to distribution technical fields, and in particular to a kind of mixed gas suitable for tun is controllably matched
Gas system.
Background technology
AOD purifying methods are the abbreviations of argon-oxygen-decarburizing process (Argon-Oxygen Decarburization).It is stainless refining
When steel, it be under normal atmospheric pressure to oxygen blowing in molten steel while, be blown into inert gas argon or nitrogen, pass through reduce carbon oxygen
Pressure, achievees the effect that false vacuum, to make carbon content drop to very low level, and inhibits the oxidation of chromium in steel.And how
While under normal atmospheric pressure to oxygen blowing in molten steel, it is blown into inert gas argon or nitrogen, then needs to realize oxygen by air distribution system
The distribution of gas and inert gas.
But the utility model inventor has found that air distributing device currently used for oxygen and inert gas
All be manual operation, be charged therein a group timesharing, pressure tabular value that operating personnel must be on moment attention device panel and
Gravimetric value on electronic balance, when its value is close to precalculated definite value, operating personnel should then manually switch off rapidly setting
Valve in air inlet pipe, while Quick fastening cylinder valve, until all components are all filled in finished product gas cylinder.Due to mixing
The concentration of component of gas is minimum up to 10-6Grade, quality is minimum less than 1 gram, the valve on air inlet pipe is turned off manually and steel cylinder
When valve, there are larger errors for the influx of gas, cause the uncertainty of oxygen and inert gas big, magnitude accuracy drop
It is low.And mixing gas component at most can reach a lot of kinds sometimes, need by each component raw material gas be filled with respectively one at
In product gas cylinder, the component gas being filled in the ban closes the error that valve twists big valve not in time or reversely because of operating personnel,
When weighing more than numerical value computed in advance, then need all gas component being filled with that must all make corresponding adjustment again thereafter,
Equivalent value must then give up this bottle and do again again, cause waste of raw materials beyond when can not excessively make up.In addition, certain gases
Component may be pernicious gas, as operating personnel do not simultaneously close off device valve and bottle valve, it is likely that cause gas to leak,
There is security risks.
Therefore, air distributing device the degree of automation of oxygen and inert gas mixed gas is low at present, and intelligence degree is poor, matches
It is low to set proportional precision, execute-in-place safety is low.
Utility model content
It is low for air distributing device the degree of automation of oxygen of the existing technology and inert gas mixed gas, it is intelligent
Degree is poor, and allocation ratio precision is low, the low technical problem of execute-in-place safety, and the utility model offer one kind is novel to be suitable for
The controllable air distribution system of mixed gas of tun.
In order to solve the above-mentioned technical problem, the utility model uses the following technical solution：
A kind of controllable air distribution system of mixed gas suitable for tun, including oxygen distribution subsystem, inert gas
Distribution subsystem, switch valve module, gas pre-mixed and device, the main blend tank of gas, oxygen distribution compensating unit, inert gas distribution
Compensating unit, PLC controller and host computer；Wherein,
The oxygen distribution subsystem includes oxygen tank, first pressure gauge, the first filtering pressure reducer, the first pressure reducing valve,
One shut-off valve, the first check valve, the first pneumatic control valve, the first electropneumatic transducer and oxygen flowmete, the oxygen tank is through
The import of the first shut-off valve, the outlet of first shut-off valve are connected to after the filtering of one filtering pressure reducer and the decompression of the first pressure reducing valve
It is connected to the import of the first pneumatic control valve through the first check valve, oxygen stream is connected in the outlet of first pneumatic control valve
Scale, the first pressure gauge are connected to the oxygen conveying pipe between oxygen tank and the first filtering pressure reducer on the road, and described first
The air source end of electropneumatic transducer is connect with the first filtering pressure reducer, the pneumatic end of first electropneumatic transducer and the first pneumatic tune
The spool connection of valve is saved, the telecommunications end of first electropneumatic transducer is electrically connected with PLC controller；
The inert gas distribution subsystem includes that argon gas distribution subsystem, nitrogen distribution subsystem and inert gas are pneumatic
Three-way control valve；Wherein, the argon gas distribution subsystem includes argon tanks, second pressure gauge, the second filtering pressure reducer, second subtracts
Pressure valve, the second shut-off valve, the second check valve, the second pneumatic control valve, the second electropneumatic transducer and argon flow amount table, the argon gas
Tank is connected to the import of the second shut-off valve, second shut-off valve after the filtering of the second filtering pressure reducer and the decompression of the second pressure reducing valve
The second check valve of outlet be connected to the import of the second pneumatic control valve, be connected in the outlet of second pneumatic control valve
Argon flow amount table, the second pressure gauge are connected to the road of the argon delivery lines between argon tanks and the second filtering pressure reducer, institute
The air source end for stating the second electropneumatic transducer is connect with the second filtering pressure reducer, the pneumatic end and second of second electropneumatic transducer
The spool of pneumatic control valve connects, and the telecommunications end of second electropneumatic transducer is electrically connected with PLC controller；
The nitrogen distribution subsystem includes nitrogen gas tank, third pressure gauge, third filtering pressure reducer, third pressure reducing valve,
Three shut-off valves, third check valve, third pneumatic control valve, third electropneumatic transducer and nitrogen stream scale, the nitrogen gas tank is through
The import of third shut-off valve, the outlet of the third shut-off valve are connected to after the filtering of three filtering pressure reducers and the decompression of third pressure reducing valve
It is connected to the import of third pneumatic control valve through third check valve, nitrogen stream is connected in the outlet of the third pneumatic control valve
Scale, the third pressure gauge are connected to the road of the nitrogen delivery pipe between nitrogen gas tank and third filtering pressure reducer, the third
The air source end of electropneumatic transducer is connect with third filtering pressure reducer, and the pneumatic end of the third electropneumatic transducer is pneumatically adjusted with third
The spool connection of valve is saved, the telecommunications end of the third electropneumatic transducer is electrically connected with PLC controller；
First air inlet of the inert gas pneumatic three-way control valve is connected in the outlet of the second pneumatic control valve, institute
The second air inlet for stating inert gas pneumatic three-way control valve is connected in the outlet of third pneumatic control valve, the inert gas
The outlet of the gas outlet of pneumatic three-way control valve and the first pneumatic control valve is connected to gas pre-mixed with device air inlet simultaneously；
Described gas pre-mixed and device, which is equipped with, is vacuum-evacuated unit, gas sampling cell and pressure sensing cell, described true
Empty exhaust unit includes sequentially connected first pneumatic on-off valve, the first vacuum solenoid and the first vacuum pump, first gas
Dynamic switch valve is connect with the exhaust outlet on gas pre-mixed and device, and the unit that is vacuum-evacuated is suitable for arranging in gas pre-mixed initial vacuum
Remove the residual gas in gas premixer；The gas sampling cell include sequentially connected sampling switch valve, sampling pump and
Gas concentration analyzer, the gas concentration analyzer are electrically connected with PLC controller, the sampling switch valve with it is gas pre-mixed and
Sample tap connection on device, the gas sampling cell are suitable for the gaseous mixture in gas sampled premixer among gas pre-mixed
Body；The pressure sensing cell includes sequentially connected pressure opening and closing valve, pneumatic stopping valve and pressure transmitter, and the pressure becomes
Device is sent to be electrically connected with PLC controller, the pressure opening and closing valve is connect with the pressure port on gas pre-mixed and device, the pressure detecting
Unit is suitable for the mixture pressure in detection gas premixer among gas pre-mixed；
The switch valve module include the first electromagnetic switch valve, the air intake of first electromagnetic switch valve with it is gas pre-mixed
It is connected with the blowing mouth of device, the gas outlet of first electromagnetic switch valve is connect with the air inlet of the main blend tank of gas, and described
First electromagnetic switch valve is electrically connected with PLC controller；
For the volume of the main blend tank of gas much larger than gas pre-mixed and device volume, the main blend tank of gas includes true
Empty removal unit, gas concentration measurement unit and pressure measurement cell, the vacuum degassing unit include sequentially connected second
Pneumatic on-off valve, the second vacuum solenoid and the second vacuum pump, second pneumatic on-off valve and removing on the main blend tank of gas
Gas port connects, the residual gas that the vacuum degassing unit is suitable for being removed in vacuum before gas master is mixed in the main blend tank of gas；
The gas concentration measurement unit includes the ultrasonic oxygen concentration sensor and ultrasonic wave being set on the main blend tank wall surface of gas
Inert gas concentration sensor, the ultrasonic oxygen concentration sensor and ultrasonic wave inert gas concentration sensor are controlled with PLC
Device electrical connection processed, the gas concentration measurement unit are suitable for measuring the concentration of oxygen and inert gas among gas master is mixed；Institute
It is the supersonic gas pressure sensor being arranged on the main blend tank wall surface of gas, the ultrasonic gas to state pressure measurement cell
Pressure sensor is electrically connected with PLC controller, and the pressure measurement cell is suitable for measuring the main mixing of gas among gas master is mixed
Mixture pressure in tank；
The oxygen distribution compensating unit includes sequentially connected oxygen compressor, oxygen buffer and the first automatic adjustment
Valve, first automatic regulating valve and the pipeline connection close to the main blend tank of gas；The inert gas distribution compensating unit packet
Include sequentially connected inert gas compressor, inert gas buffer and the second automatic regulating valve, second automatic regulating valve
Also it is controlled respectively with PLC with the pipeline connection close to the main blend tank of gas, first automatic regulating valve and the second automatic regulating valve
Device electrical connection processed；
The PLC controller is suitable for the mixed gas of gas concentration analyzer on-line period measurement on gas pre-mixed and device
Ratio is compared with preset ratio of gas mixture, in real time to first electropneumatic transducer, the second electropneumatic transducer and
Three electropneumatic transducers are controlled, to adjust first pneumatic control valve, the second pneumatic control valve and third pneumatic control valve
Aperture, when the ratio of the mixed gas reaches preset requirement, the PLC controller will control the first electromagnetic switch
Valve is by the switching-on state of closed state；
The host computer is connected with PLC controller communication, and the host computer includes touch display screen and data storage, institute
State touch display screen be suitable for the trim analysis including target mixed gases matching ratio carry out setting and process data into
Row display, the data storage are suitable for crossing number of passes to the various distributions including valve parameter by what PLC controller uploaded
According to being preserved.
Compared with prior art, the controllable air distribution system of the mixed gas provided by the utility model suitable for tun,
According to gas concentration analyzer online to the target mixed gases matching ratio of mixed gas mixed proportion analysis result and setting
Comparison, PLC controller are corresponding automatic respectively by the first electropneumatic transducer, the second electropneumatic transducer and third electropneumatic transducer
The aperture of the first pneumatic control valve, the second pneumatic control valve and third pneumatic control valve is adjusted, and electropneumatic transducer can be high accurate
The aperture of pneumatic control valve is adjusted, it is thus achieved that the automation control during distribution and intelligent adjusting, it is no longer necessary to grasp
To make personnel frequently to manually control, allocation ratio precision is high, and execute-in-place is safe, and when the ratio of mixed gas reaches
When to preset requirement, PLC controller controls the first electromagnetic switch valve by the switching-on state of closed state, i.e., is mixed in gas master
Formal distribution with mixed gas is completed in tank, improves the ratio precision of entire air distribution system；Meanwhile it can be to gas master
Gas concentration and pressure of the blend tank during formal distribution measure, and to prevent, gas mixing ratio ratio is low and pressure
Low situation occurs, and when minor deviations occurs in mixed gases matching ratio, and it is automatic can to control first by PLC controller
Regulating valve or the second automatic regulating valve automatically open, into gas main blend tank additional proportion oxygen or inert gas on the low side into
Row compensation ensures that preparation gas mixing is uniform, that is, ensure that whole to realize the quick and steady adjustment of mixed gases matching deviation
A formal distribution process is accurately controllably completed；In addition, the volume of the main blend tank of gas is much larger than gas pre-mixed and device volume,
It is adjusted using the gas pre-mixed and device of smaller size smaller to complete ratio of gas mixture analysis and corresponding pneumatic control valve, makes mixing
The ratio of gas reaches preset requirement as early as possible, is input to again when gas mixing ratio ratio reaches requirement in the main blend tank of gas
Formal completion distribution saves it is possible thereby to reduce because of the excessive direct premix the time it takes of the main mixing tank volume of gas
The time of pre-mix stage and the air distribution efficiency for promoting whole system, especially for the main blend tank of gas volume it is larger when very
Useful, this air distribution system is simple in structure, the distribution company especially suitable for profession or large-scale distribution website.
Further, the switch valve module further includes the second electromagnetic switch valve, the air intake of second electromagnetic switch valve
It is connect with the outlet of the gas outlet of inert gas pneumatic three-way control valve and the first pneumatic control valve, second electromagnetic switch valve
Gas outlet connect with gas pre-mixed and device.
Further, it is additionally provided with gas emptying unit on the gas pre-mixed and device, the gas emptying unit is and gas
The air-operated solenoid valve of evacuation port connection in premixer.
Further, the PLC controller uses siemens PLC series of PLC.
Description of the drawings
Fig. 1 is the structural representation of the controllable air distribution system of the mixed gas suitable for tun provided by the utility model
Figure.
Fig. 2 is the structural schematic diagram of oxygen and inert gas distribution subsystem in Fig. 1.
In figure, 1, oxygen distribution subsystem；10, oxygen tank；11, first pressure gauge；12, the first filtering pressure reducer；13,
One pressure reducing valve；14, the first shut-off valve；15, the first check valve；16, the first pneumatic control valve；17, the first electropneumatic transducer；18、
Oxygen flowmete；2, inert gas distribution subsystem；21, argon gas distribution subsystem；210, argon tanks；211, second pressure gauge；
212, the second filtering pressure reducer；213, the second pressure reducing valve；214, the second shut-off valve；215, the second check valve；216, second is pneumatic
Regulating valve；217, the second electropneumatic transducer；218, argon flow amount table；22, nitrogen distribution subsystem；220, nitrogen gas tank；221,
Three pressure gauges；222, third filtering pressure reducer；223, third pressure reducing valve；224, third shut-off valve；225, third check valve；226、
Third pneumatic control valve；227, third electropneumatic transducer；228, nitrogen stream scale；23, inert gas pneumatic three-way control valve；3、
Switch valve module；31, the first electromagnetic switch valve；32, the second electromagnetic switch valve；4, gas pre-mixed and device；41, it is vacuum-evacuated single
Member；411, the first pneumatic on-off valve；412, the first vacuum solenoid；413, the first vacuum pump；42, gas sampling cell；421、
Sampling switch valve；422, sampling pump；423, gas concentration analyzer；43, pressure sensing cell；431, pressure opening and closing valve；432、
Pneumatic stopping valve；433, pressure transmitter；44, gas empties unit；5, the main blend tank of gas；51, vacuum degassing unit；511、
Second pneumatic on-off valve；512, the second vacuum solenoid；513, the second vacuum pump；52, gas concentration measurement unit；521, ultrasonic
Wave oxygen concentration sensor；522, ultrasonic wave inert gas concentration sensor；53, pressure measurement cell；6, oxygen distribution compensates
Unit；61, oxygen compressor；62, oxygen buffer；63, the first automatic regulating valve；7, inert gas distribution compensating unit；71、
Inert gas compressor；72, inert gas buffer；73, the second automatic regulating valve；8, PLC controller；9, host computer.
Specific implementation mode
In order to make the technical means, creative features, achievement of purpose, and effectiveness of the utility model be easy to understand, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
In the description of the present invention, it should be understood that term " longitudinal direction ", " radial direction ", " length ", " width ", " thickness
The side of the instructions such as degree ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside"
Position or position relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description the utility model and simplification is retouched
It states, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and operation,
Therefore it should not be understood as limiting the present invention.In the description of the present invention, unless otherwise indicated, " multiple " contain
Justice is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
Shown in please referring to Fig.1, the utility model provides a kind of controllable air distribution system of the mixed gas suitable for tun,
Including oxygen distribution subsystem 1, inert gas distribution subsystem 2, switch valve module 3, the gas pre-mixed and main mixing of device 4, gas
Tank 5, oxygen distribution compensating unit 6, inert gas distribution compensating unit 7, PLC controller 8 and host computer 9；Wherein,
The oxygen distribution subsystem 1 subtracts including oxygen tank 10, first pressure gauge 11, the first filtering pressure reducer 12, first
Pressure valve 13, the first shut-off valve 14, the first check valve 15, the first pneumatic control valve 16, the first electropneumatic transducer 17 and oxygen flow
Table 18, the oxygen tank 10 are connected to the first shut-off valve 14 after the filtering of the first filtering pressure reducer 12 and the decompression of the first pressure reducing valve 13
Import, the first check valve of outlet 15 of first shut-off valve 14 is connected to the import of the first pneumatic control valve 16, described
Oxygen flowmete 18 is connected in the outlet of first pneumatic control valve 16, the first pressure gauge 11 is connected to oxygen tank 10 and
Oxygen conveying pipe road between one filtering pressure reducer 12, the air source end of first electropneumatic transducer 17 are depressurized with the first filtering
Device 12 connects, and the pneumatic end of first electropneumatic transducer 17 is connect with the spool of the first pneumatic control valve 16, first electricity
The telecommunications end of gas converter 17 is electrically connected with PLC controller 8；I.e. first filtering pressure reducer 12 is the first electropneumatic transducer 17
Air source, the control electric signal that PLC controller 8 is sent is converted to air pressure signal by first electropneumatic transducer 17, to adjust
The spool of first pneumatic control valve 16 is directly proportional to air pressure signal, and oxygen is adjusted the flow to needs；
The inert gas distribution subsystem 2 includes argon gas distribution subsystem 21, nitrogen distribution subsystem 22 and indifferent gas
Body pneumatic three-way control valve 23；Wherein, the argon gas distribution subsystem 21 includes argon tanks 210, second pressure gauge 211, second
Filtering pressure reducer 212, the second pressure reducing valve 213, the second shut-off valve 214, the second check valve 215, the second pneumatic control valve 216,
Two electropneumatic transducers 217 and argon flow amount table 218, the argon tanks 210 are through the filtering of the second filtering pressure reducer 212 and the second decompression
Valve 213 is connected to the import of the second shut-off valve 214 after depressurizing, the second check valve of outlet 215 of second shut-off valve 214 connects
It is connected to the import of the second pneumatic control valve 216, argon flow amount table 218 is connected in the outlet of second pneumatic control valve 216,
The second pressure gauge 211 is connected to the road of the argon delivery lines between argon tanks 210 and the second filtering pressure reducer 212, described
The air source end of second electropneumatic transducer 217 is connect with the second filtering pressure reducer 212, second electropneumatic transducer 217 it is pneumatic
End is connect with the spool of the second pneumatic control valve 216, and telecommunications end and the PLC controller 8 of second electropneumatic transducer 217 are electrically connected
It connects；I.e. second filtering pressure reducer 212 is the air source of the second electropneumatic transducer 217, and second electropneumatic transducer 217 will
The control electric signal that PLC controller 8 is sent is converted to air pressure signal, with adjust the spool of second pneumatic control valve 216 with
Air pressure signal is directly proportional, and argon gas is adjusted the flow to needs；
The nitrogen distribution subsystem 22 includes nitrogen gas tank 220, third pressure gauge 221, third filtering pressure reducer 222, the
Three pressure reducing valves 223, third shut-off valve 224, third check valve 225, third pneumatic control valve 226,227 and of third electropneumatic transducer
Nitrogen stream scale 228, the nitrogen gas tank 220 are connected to after the filtering of third filtering pressure reducer 222 and third pressure reducing valve 223 are depressurized
The import of third shut-off valve 224, the outlet of the third shut-off valve 224 are connected to third through third check valve 225 and pneumatically adjust
The import of valve 226 is connected with nitrogen stream scale 228, the third pressure gauge in the outlet of the third pneumatic control valve 226
221 are connected to the nitrogen delivery pipe road between nitrogen gas tank 220 and third filtering pressure reducer 222, the third electropneumatic transducer
227 air source end is connect with third filtering pressure reducer 222, and the pneumatic end of the third electropneumatic transducer 227 is pneumatically adjusted with third
The spool connection of valve 226 is saved, the telecommunications end of the third electropneumatic transducer 227 is electrically connected with PLC controller 8；The i.e. described third
Filtering pressure reducer 222 is the air source of third electropneumatic transducer 227, and the third electropneumatic transducer 227 sends PLC controller 8
Control electric signal be converted to air pressure signal, it is directly proportional to air pressure signal with the spool for adjusting the third pneumatic control valve 226,
Nitrogen is adjusted into the flow to needs；
First air inlet of the inert gas pneumatic three-way control valve 23 is connected to the outlet of the second pneumatic control valve 216
On, the second air inlet of the inert gas pneumatic three-way control valve 23 is connected in the outlet of third pneumatic control valve 226, i.e.,
The input selection of argon gas and nitrogen may be implemented by the inert gas pneumatic three-way control valve 23, the inert gas is pneumatic
The outlet of the gas outlet of three-way control valve 23 and the first pneumatic control valve 16 is connected to gas pre-mixed with device 4 air inlet simultaneously；
Described gas pre-mixed and device 4, which is equipped with, is vacuum-evacuated unit 41, gas sampling cell 42 and pressure sensing cell 43,
The vacuum exhaust unit 41 includes sequentially connected first pneumatic on-off valve 411, the first vacuum solenoid 412 and the first vacuum
Pump 413, first pneumatic on-off valve 411 is connect with the exhaust outlet on gas pre-mixed and device 4, and the vacuum exhaust unit 41 is suitable
In in the gas pre-mixed residual gas in device 4 of gas pre-mixed initial vacuum venting；The gas sampling cell 42 includes successively
Sampling switch valve 421, sampling pump 422 and the gas concentration analyzer 423 of connection, the gas concentration analyzer 423 and PLC are controlled
Device 8 processed is electrically connected, and the sampling switch valve 421 is connect with the sample tap on gas pre-mixed and device 4, the gas sampling cell 42
Suitable for the mixed gas in the gas sampled premixer 4 among gas pre-mixed；The pressure sensing cell 43 includes connecting successively
Pressure opening and closing valve 431, pneumatic stopping valve 432 and the pressure transmitter 433 connect, the pressure transmitter 433 and PLC controller 8
Electrical connection, the pressure opening and closing valve 431 are connect with the pressure port on gas pre-mixed and device 4, and the pressure sensing cell 43 is suitable for
Mixture pressure among gas pre-mixed in detection gas premixer 4；
The switch valve module 3 includes the first electromagnetic switch valve 31, the air intake and gas of first electromagnetic switch valve 31
The blowing mouth of body premixer 4 connects, and the air inlet of the main blend tank of the gas outlet of first electromagnetic switch valve 31 and gas 5 connects
It connects, and first electromagnetic switch valve 31 is electrically connected with PLC controller 8；
Much larger than gas pre-mixed and device 4 volume, the main blend tank 5 of gas wraps the volume of the main blend tank of the gas 5
Include vacuum degassing unit 51, gas concentration measurement unit 52 and pressure measurement cell 53, the vacuum degassing unit 51 include according to
The second pneumatic on-off valve 511, the second vacuum solenoid 512 and the second vacuum pump 513 of secondary connection, second pneumatic on-off valve
511 with, except gas port is connect, the vacuum degassing unit 51 is suitable for being removed in vacuum before gas master is mixed on the main blend tank of gas 5
Residual gas in the main blend tank of gas 5；The gas concentration measurement unit 52 includes being set to (being such as bonded or welded) gas master
Ultrasonic oxygen concentration sensor 521 on 5 wall surface of blend tank and ultrasonic wave inert gas concentration sensor 522, the ultrasound
Wave oxygen concentration sensor 521 and ultrasonic wave inert gas concentration sensor 522 are electrically connected with PLC controller 8, and the gas is dense
Spend the concentration that measuring unit 52 is suitable for measuring oxygen and inert gas among gas master is mixed；The pressure measurement cell 53 is to set
Set and (be such as bonded or welded) the supersonic gas pressure sensor on main 5 wall surface of blend tank of gas, the ultrasonic gas pressure
Force snesor is electrically connected with PLC controller 8, and the pressure measurement cell 53 is suitable for measuring the main mixing of gas among gas master is mixed
Mixture pressure in tank 5；
The oxygen distribution compensating unit 6 include sequentially connected oxygen compressor 61, oxygen buffer 62 and first from
Dynamic regulating valve 63, first automatic regulating valve 63 and the pipeline connection close to the main blend tank of gas 5, thus oxygen can be through oxygen
Compressor 61, which enters after compressing in oxygen buffer 62, to be cached；The inert gas distribution compensating unit 7 includes sequentially connected
Inert gas compressor 71, inert gas buffer 72 and the second automatic regulating valve 73, second automatic regulating valve 73 also with
Close to the pipeline connection of the main blend tank of gas 5, thus inert gas can enter indifferent gas after the compression of inert gas compressor 71
It is cached in body buffer 72, first automatic regulating valve, 63 and second automatic regulating valve 73 is electrically connected with PLC controller 8 respectively
It connects；
The PLC controller 8 be suitable for in gas pre-mixed and device 4 and the main blend tank of gas 5 gas concentration and pressure believe
The ratio of gas mixture for number being acquired, and 423 on-line period of gas concentration analyzer on gas pre-mixed and device 4 being measured with it is pre-
If ratio of gas mixture be compared, in real time to first electropneumatic transducer 17, the second electropneumatic transducer 217 and third electricity
Gas converter 227 is controlled, and is pneumatically adjusted with adjusting first pneumatic control valve 16, the second pneumatic control valve 216 and third
The aperture for saving valve 226, i.e., be adjusted the aperture of pneumatic on-off valve by electropneumatic transducer, when the proportioning of the mixed gas
When ratio reaches preset requirement, the PLC controller 8 will control the first electromagnetic switch valve 31 by the switching-on shape of closed state
State；
The host computer 9 is connected with the communication of PLC controller 8, and the host computer 9 includes that touch display screen and data store
Device, the touch display screen are suitable for carrying out setting and crossing number of passes to the trim analysis including target mixed gases matching ratio
According to being shown, and preset trim analysis is descended into PLC controller 8, the data storage is suitable for PLC controller
8 uploads preserve the various distribution process datas including valve parameter, so as in distribution in proportion next time
In journey can a key extraction be rapidly completed distribution setting.
Compared with prior art, the controllable air distribution system of the mixed gas provided by the utility model suitable for tun,
According to gas concentration analyzer online to the target mixed gases matching ratio of mixed gas mixed proportion analysis result and setting
Comparison, PLC controller are corresponding automatic respectively by the first electropneumatic transducer, the second electropneumatic transducer and third electropneumatic transducer
The aperture of the first pneumatic control valve, the second pneumatic control valve and third pneumatic control valve is adjusted, and electropneumatic transducer can be high accurate
The aperture of pneumatic control valve is adjusted, it is thus achieved that the automation control during distribution and intelligent adjusting, it is no longer necessary to grasp
To make personnel frequently to manually control, allocation ratio precision is high, and execute-in-place is safe, and when the ratio of mixed gas reaches
When to preset requirement, PLC controller controls the first electromagnetic switch valve by the switching-on state of closed state, i.e., is mixed in gas master
Formal distribution with mixed gas is completed in tank, improves the ratio precision of entire air distribution system；Meanwhile it can be to gas master
Gas concentration and pressure of the blend tank during formal distribution measure, and to prevent, gas mixing ratio ratio is low and pressure
Low situation occurs, and when minor deviations occurs in mixed gases matching ratio, and it is automatic can to control first by PLC controller
Regulating valve or the second automatic regulating valve automatically open, into gas main blend tank additional proportion oxygen or inert gas on the low side into
Row compensation ensures that preparation gas mixing is uniform, that is, ensure that whole to realize the quick and steady adjustment of mixed gases matching deviation
A formal distribution process is accurately controllably completed；In addition, the volume of the main blend tank of gas is much larger than gas pre-mixed and device volume,
It is adjusted using the gas pre-mixed and device of smaller size smaller to complete ratio of gas mixture analysis and corresponding pneumatic control valve, makes mixing
The ratio of gas reaches preset requirement as early as possible, is input to again when gas mixing ratio ratio reaches requirement in the main blend tank of gas
Formal completion distribution saves it is possible thereby to reduce because of the excessive direct premix the time it takes of the main mixing tank volume of gas
The time of pre-mix stage and the air distribution efficiency for promoting whole system, especially for the main blend tank of gas volume it is larger when very
Useful, this air distribution system is simple in structure, the distribution company especially suitable for profession or large-scale distribution website.
As specific embodiment, the switch valve module 3 further includes the second electromagnetic switch valve 32, second electromagnetic switch
The air intake of valve 32 is connect with the outlet of the gas outlet of inert gas pneumatic three-way control valve 23 and the first pneumatic control valve 16, institute
The gas outlet for stating the second electromagnetic switch valve 32 is connect with gas pre-mixed and device 4, thus in described gas pre-mixed and device 4 and/or gas
When the main blend tank of body 5 abnormal conditions occurs or needs to safeguard, it can will be connected by second electromagnetic switch valve 32 gas pre-mixed
With the shutdown of the pipeline of device 4 and the main blend tank of gas 5, to be provided a convenient for emergency processing or maintenance processing.
As specific embodiment, gas emptying unit 44 is additionally provided on described gas pre-mixed and device 4, the gas emptying is single
Member 44 is the air-operated solenoid valve being connect with the evacuation port on gas pre-mixed and device 4, can be by gas from there through the air-operated solenoid valve
The mixed gas discharge after qualification is premixed in premixer 4.
As specific embodiment, the PLC controller 8 uses siemens PLC series of PLC, Siemens S7-200PLC
Have speed fast under real-time mode, has the characteristics that communication function and higher productivity, loaded inside S7-200PLC hosts
There is automatic distributing software, full machine switching value, analog input and output, Data Detection, calculating and process control, realization can be completed and matched
Gas process automation and to process data security monitoring.
As specific embodiment, the touch display screen in the host computer 9 uses Siemens's MP277 touch screens, MP277 to touch
It touches with PPI protocols between screen and PLC controller 8, thus, it is possible to complete including target mixed gases matching ratio
Trim analysis is set, and can realize that various processes data are shown.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the right of the utility model.
Claims (4)
1. a kind of controllable air distribution system of mixed gas suitable for tun, which is characterized in that including oxygen distribution subsystem,
Inert gas distribution subsystem, switch valve module, gas pre-mixed and device, the main blend tank of gas, oxygen distribution compensating unit, inertia
Gas distribution compensating unit, PLC controller and host computer；Wherein,
The oxygen distribution subsystem include oxygen tank, first pressure gauge, the first filtering pressure reducer, the first pressure reducing valve, first section
Only valve, the first check valve, the first pneumatic control valve, the first electropneumatic transducer and oxygen flowmete, the oxygen tank is through the first mistake
It is connected to the import of the first shut-off valve after the filtering of filter pressure reducer and the decompression of the first pressure reducing valve, the outlet of first shut-off valve the
One check valve is connected to the import of the first pneumatic control valve, and oxygen flow is connected in the outlet of first pneumatic control valve
Table, the first pressure gauge are connected to the road of the oxygen conveying pipe between oxygen tank and the first filtering pressure reducer, first electricity
The air source end of gas converter is connect with the first filtering pressure reducer, the pneumatic end of first electropneumatic transducer and the first pneumatic adjusting
The spool of valve connects, and the telecommunications end of first electropneumatic transducer is electrically connected with PLC controller；
The inert gas distribution subsystem includes argon gas distribution subsystem, nitrogen distribution subsystem and inert gas Pneumatic three-way
Regulating valve；Wherein, the argon gas distribution subsystem includes argon tanks, second pressure gauge, the second filtering pressure reducer, the second decompression
Valve, the second shut-off valve, the second check valve, the second pneumatic control valve, the second electropneumatic transducer and argon flow amount table, the argon tanks
The import of the second shut-off valve is connected to after the filtering of the second filtering pressure reducer and the decompression of the second pressure reducing valve, second shut-off valve
Outlet is connected to the import of the second pneumatic control valve through the second check valve, and argon is connected in the outlet of second pneumatic control valve
Air-flow scale, the second pressure gauge is connected to the road of the argon delivery lines between argon tanks and the second filtering pressure reducer, described
The air source end of second electropneumatic transducer is connect with the second filtering pressure reducer, pneumatic end and the second gas of second electropneumatic transducer
The spool connection of dynamic regulating valve, the telecommunications end of second electropneumatic transducer is electrically connected with PLC controller；
The nitrogen distribution subsystem includes nitrogen gas tank, third pressure gauge, third filtering pressure reducer, third pressure reducing valve, third section
Only valve, third check valve, third pneumatic control valve, third electropneumatic transducer and nitrogen stream scale, the nitrogen gas tank is through third mistake
It is connected to the import of third shut-off valve after the filtering of filter pressure reducer and the decompression of third pressure reducing valve, the outlet of the third shut-off valve the
Three check valves are connected to the import of third pneumatic control valve, and nitrogen flow is connected in the outlet of the third pneumatic control valve
Table, the third pressure gauge are connected to the road of the nitrogen delivery pipe between nitrogen gas tank and third filtering pressure reducer, the third electricity
The air source end of gas converter is connect with third filtering pressure reducer, and the pneumatic end of the third electropneumatic transducer is pneumatically adjusted with third
The spool of valve connects, and the telecommunications end of the third electropneumatic transducer is electrically connected with PLC controller；
First air inlet of the inert gas pneumatic three-way control valve is connected in the outlet of the second pneumatic control valve, described lazy
Second air inlet of property gas pneumatic three-way control valve is connected in the outlet of third pneumatic control valve, and the inert gas is pneumatic
The outlet of the gas outlet of three-way control valve and the first pneumatic control valve is connected to gas pre-mixed with device air inlet simultaneously；
Described gas pre-mixed and device, which is equipped with, is vacuum-evacuated unit, gas sampling cell and pressure sensing cell, the vacuum row
Gas unit includes sequentially connected first pneumatic on-off valve, the first vacuum solenoid and the first vacuum pump, and described first pneumatically opens
It closes valve to connect with the exhaust outlet on gas pre-mixed and device, the vacuum exhaust unit is suitable in gas pre-mixed initial vacuum venting gas
Residual gas in body premixer；The gas sampling cell includes sequentially connected sampling switch valve, sampling pump and gas
Concentration analyzer, the gas concentration analyzer are electrically connected with PLC controller, on the sampling switch valve and gas pre-mixed and device
Sample tap connection, the gas sampling cell is suitable for the mixed gas in gas sampled premixer among gas pre-mixed；
The pressure sensing cell includes sequentially connected pressure opening and closing valve, pneumatic stopping valve and pressure transmitter, the pressure inverting
Device is electrically connected with PLC controller, and the pressure opening and closing valve is connect with the pressure port on gas pre-mixed and device, the pressure detecting list
Member is suitable for the mixture pressure in detection gas premixer among gas pre-mixed；
The switch valve module includes the first electromagnetic switch valve, air intake and the gas pre-mixed and device of first electromagnetic switch valve
Blowing mouth connection, the gas outlet of first electromagnetic switch valve connect with the air inlet of the main blend tank of gas, and described first
Electromagnetic switch valve is electrically connected with PLC controller；
For the volume of the main blend tank of gas much larger than gas pre-mixed and device volume, the main blend tank of gas includes that vacuum is removed
Gas unit, gas concentration measurement unit and pressure measurement cell, the vacuum degassing unit include sequentially connected second pneumatic
Switch valve, the second vacuum solenoid and the second vacuum pump, second pneumatic on-off valve remove gas port on the main blend tank of gas
Connection, the residual gas that the vacuum degassing unit is suitable for being removed in vacuum before gas master is mixed in the main blend tank of gas；It is described
Gas concentration measurement unit includes the ultrasonic oxygen concentration sensor being set on the main blend tank wall surface of gas and ultrasonic wave inertia
Gas concentration sensor, the ultrasonic oxygen concentration sensor and ultrasonic wave inert gas concentration sensor and PLC controller
Electrical connection, the gas concentration measurement unit are suitable for measuring the concentration of oxygen and inert gas among gas master is mixed；The pressure
Power measuring unit is the supersonic gas pressure sensor being arranged on the main blend tank wall surface of gas, the ultrasonic gas pressure
Sensor is electrically connected with PLC controller, and the pressure measurement cell is suitable in measuring the main blend tank of gas among gas master is mixed
Mixture pressure；
The oxygen distribution compensating unit includes sequentially connected oxygen compressor, oxygen buffer and the first automatic regulating valve,
First automatic regulating valve and the pipeline connection close to the main blend tank of gas；The inert gas distribution compensating unit include according to
Inert gas compressor, inert gas buffer and the second automatic regulating valve of secondary connection, second automatic regulating valve also with
Close to the pipeline connection of gas main blend tank, first automatic regulating valve and the second automatic regulating valve respectively with PLC controller
Electrical connection；
The PLC controller is suitable for the ratio of gas mixture of gas concentration analyzer on-line period measurement on gas pre-mixed and device
It is compared with preset ratio of gas mixture, in real time to first electropneumatic transducer, the second electropneumatic transducer and third electricity
Gas converter is controlled, to adjust opening for first pneumatic control valve, the second pneumatic control valve and third pneumatic control valve
Degree, when the ratio of the mixed gas reaches preset requirement, the PLC controller will control the first electromagnetic switch valve by
The switching-on state of closed state；
The communication of the host computer and PLC controller connects, and the host computer includes touch display screen and data storage, described to touch
Touch display screen be suitable for the trim analysis including target mixed gases matching ratio carry out setting and process data show
Show, the data storage be suitable for by PLC controller upload to the various distribution process datas including valve parameter into
Row preserves.
2. the controllable air distribution system of the mixed gas according to claim 1 suitable for tun, which is characterized in that described
It further includes the second electromagnetic switch valve to switch valve module, air intake and the inert gas Pneumatic three-way tune of second electromagnetic switch valve
Section valve gas outlet connect with the outlet of the first pneumatic control valve, the gas outlet of second electromagnetic switch valve and it is gas pre-mixed and
Device connects.
3. the controllable air distribution system of the mixed gas according to claim 1 suitable for tun, which is characterized in that described
Gas emptying unit is additionally provided on gas pre-mixed and device, the gas emptying unit is to connect with the evacuation port on gas pre-mixed and device
The air-operated solenoid valve connect.
4. the controllable air distribution system of the mixed gas according to claim 1 suitable for tun, which is characterized in that described
PLC controller uses siemens PLC series of PLC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721352693.6U CN207667584U (en) | 2017-10-17 | 2017-10-17 | A kind of controllable air distribution system of mixed gas suitable for tun |
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| CN201721352693.6U CN207667584U (en) | 2017-10-17 | 2017-10-17 | A kind of controllable air distribution system of mixed gas suitable for tun |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479123A (en) * | 2019-09-24 | 2019-11-22 | 苏州宏博净化设备有限公司 | Intelligent automatic hydrogen nitrogen matching device |
| CN113701048A (en) * | 2021-09-01 | 2021-11-26 | 天津市鹏天工贸有限公司 | Gas charging and distributing system for automatically configuring mixed gas with rated proportion for submersible gas cylinder |
-
2017
- 2017-10-17 CN CN201721352693.6U patent/CN207667584U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479123A (en) * | 2019-09-24 | 2019-11-22 | 苏州宏博净化设备有限公司 | Intelligent automatic hydrogen nitrogen matching device |
| CN113701048A (en) * | 2021-09-01 | 2021-11-26 | 天津市鹏天工贸有限公司 | Gas charging and distributing system for automatically configuring mixed gas with rated proportion for submersible gas cylinder |
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