CN109268680A - A kind of industrial gasses automatic charging device - Google Patents

A kind of industrial gasses automatic charging device Download PDF

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Publication number
CN109268680A
CN109268680A CN201811217135.8A CN201811217135A CN109268680A CN 109268680 A CN109268680 A CN 109268680A CN 201811217135 A CN201811217135 A CN 201811217135A CN 109268680 A CN109268680 A CN 109268680A
Authority
CN
China
Prior art keywords
fills
valve
charge
monitoring point
operated pneumatic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201811217135.8A
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Chinese (zh)
Other versions
CN109268680B (en
Inventor
陈辉
陶宏伟
林定标
王培正
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Haichang Gas Co ltd
Original Assignee
ZHEJIANG HAITIAN GAS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHEJIANG HAITIAN GAS CO Ltd filed Critical ZHEJIANG HAITIAN GAS CO Ltd
Priority to CN201811217135.8A priority Critical patent/CN109268680B/en
Publication of CN109268680A publication Critical patent/CN109268680A/en
Application granted granted Critical
Publication of CN109268680B publication Critical patent/CN109268680B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0119—Shape cylindrical with flat end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0447—Composition; Humidity
    • F17C2250/046—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use

Abstract

The invention belongs to the technical fields of gas filling, in particular to a kind of industrial gasses automatic charging device, described device includes connecting the gas conveying supervisor of industrial gasses gas source, the end of gas conveying supervisor is connected with first and is in charge of to be in charge of with second, first, which is in charge of connection first, fills station, second, which is in charge of connection second, fills station, described first is in charge of and is provided with first and fills operated pneumatic valve, second is in charge of and is provided with second and fills operated pneumatic valve, first pressure monitoring point is provided on the gas conveying supervisor, first, which fills operated pneumatic valve and first, fills and is provided with second pressure monitoring point between station, second, which fills operated pneumatic valve and second, fills and is provided with third pressure monitoring point between station, each pressure monitoring point is connected with pressure controller, each operated pneumatic valve is by pressure controller and the control of PLC program timer System.Automatic charging device provided by the invention, reduces labor intensity, improves work efficiency, highly-safe.

Description

A kind of industrial gasses automatic charging device
Technical field
The invention belongs to the technical field of gas filling, in particular to a kind of industrial gasses automatic charging device.
Background technique
Traditional industrial gas cylinder fills, and what is used is all manually-operated gate and site pressure table, passes through observation site pressure gauge Valve is opened and closed, is all that multiple stations that fill are filled using same gas source since industrial gas cylinder fills, in difference It fills in the handoff procedure of station, often occurs opening not in time another after the pressure of this group of busbar connector is charged to and closes valve When the valve of group busbar connector, it is be easy to cause hypertonia, there are very big security risk, and manual control switch's valve labor intensity Also larger.
Summary of the invention
The object of the present invention is to provide a kind of industrial gasses automatic charging device, the labour for reducing manual control switch's valve is strong Degree, improves work efficiency, while having very high safety.
The object of the present invention is achieved like this: a kind of industrial gasses automatic charging device, and described device includes connection work The gas of industry gas source conveys supervisor, and the end of gas conveying supervisor, which is connected with first, to be in charge of and be in charge of with second, and first is in charge of Connection first fills station, and second, which is in charge of connection second, fills station, and described first is in charge of and is provided with first and fills pneumatic operated valve Door, second is in charge of and is provided with second and fills operated pneumatic valve, is provided with first pressure monitoring point on the gas conveying supervisor, the One, which fills operated pneumatic valve and first, fills and is provided with second pressure monitoring point between station, and second fills operated pneumatic valve fills with second Third pressure monitoring point is provided between dress station.
It is provided with the first evacuated tube on above-mentioned gas conveying supervisor, the first evacuated tube is located at after first pressure monitoring point, The first air-discharging movable valve is provided in first evacuated tube, the first evacuated tube is connected with the external world.
Above-mentioned first is in charge of to be in charge of with second and is parallel with the second evacuated tube, and the both ends of the second evacuated tube are connected to first It fills between operated pneumatic valve and second pressure monitoring point, second fills between operated pneumatic valve and third pressure monitoring point, second row The second air-discharging movable valve and third emptying operated pneumatic valve are provided on blank pipe, the second air-discharging movable valve and third emptying are pneumatic Third evacuated tube is connected between valve, third evacuated tube is connected with the external world.
Above-mentioned first is in charge of to be in charge of with second and is parallel with the first vacuum tube, and the both ends of the first vacuum tube are connected to first Fill between operated pneumatic valve and second pressure monitoring point, second fills between operated pneumatic valve and third pressure monitoring point, first is true The first Pneumatic vacuum valve and the second Pneumatic vacuum valve, the first Pneumatic vacuum valve and the second Pneumatic vacuum are provided on blank pipe The second vacuum tube is connected between valve, the second vacuum tube is connected with pumped vacuum systems.
Above-mentioned each pressure monitoring point is provided with site pressure table and pressure transmitter.
Pressure signal is changed into electric signal by the pressure transmitter of above-mentioned each pressure monitoring point, and with pressure controller phase Even, above-mentioned each operated pneumatic valve is controlled by pressure controller and PLC program timer, and is driven by pneumatic air source.Pass through The program step that PLC program timer is set is automatically opened and is closed according to the pressure requirements of different step and is corresponding Valve.
Above-mentioned apparatus further includes control panel, and control button, buzzer and indicator light are provided on control panel.
Compared to the prior art the present invention, has the following beneficial effects:
1, the program step that the present invention is set by PLC program timer, according to the pressure requirements of different step Corresponding operated pneumatic valve is automatically opened and closed, the automatic filling of industrial gasses is realized, reduces the labor of manual control switch's valve Fatigue resistance improves work efficiency.
2, the present invention opens and closes valve in strict accordance with time-program(me) and pressure instruction, therefore security performance mentions significantly Height, meanwhile, control panel can also be further arranged in the present invention, have buzzer and indicator light to mention after each step movement in place Wake up, be related to steel cylinder clamp and etc. when can be switched to manual operation, be then turned on next step after the completion of operation, further increase peace Quan Xing.
3, the present invention is provided with automatic safety device, can be certainly when pressure is more than setting value or temperature is lower than setting value The power supply of dynamic cutting compressor.
4, the operated pneumatic valve that the present invention is driven using pneumatic air source, the operation for opening and closing valve is gentle, safety Performance is high.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Appended drawing reference: 1, gas conveying supervisor；2, first is in charge of；3, second is in charge of；4, first station is filled；5, second fills Fill station；6, first operated pneumatic valve is filled；7, second operated pneumatic valve is filled；8, first pressure monitoring point；9, second pressure monitors Point；10, third pressure monitoring point；11, the first evacuated tube；12, the first air-discharging movable valve；13, the second evacuated tube；14, second Empty operated pneumatic valve；15, third empties operated pneumatic valve；16, third evacuated tube；17, the first vacuum tube；18, the first Pneumatic vacuum Valve；19, the second Pneumatic vacuum valve；20, the second vacuum tube.
Specific embodiment
With specific embodiment, the invention will be further described with reference to the accompanying drawing, referring to Fig. 1:
A kind of industrial gasses automatic charging device, described device include connecting the gas conveying supervisor 1 of industrial gasses gas source, The end of gas conveying supervisor 1, which is connected with first, to be in charge of 2 and second and is in charge of 3, and first, which is in charge of 2 connections first, fills station 4, and second It is in charge of 3 connections second and fills station 5, described first is in charge of on 2 and is provided with first and fills operated pneumatic valve 6, and second is in charge of on 3 and is arranged There is second to fill operated pneumatic valve 7, is provided with first pressure monitoring point 8 on the gas conveying supervisor 1, first fills operated pneumatic valve 6 and first fill and are provided with second pressure monitoring point 9 between station 4, second fill operated pneumatic valve 7 and second fill station 5 it Between be provided with third pressure monitoring point 10.
It is provided with the first evacuated tube 11 on above-mentioned gas conveying supervisor 1, the first evacuated tube 11 is located at first pressure monitoring point 8 Later, the first air-discharging movable valve 12 is provided in the first evacuated tube 11, the first evacuated tube 11 is connected with the external world.
Above-mentioned first, which is in charge of 2 and second, is in charge of 3 and is parallel with the second evacuated tube 13, and the both ends of the second evacuated tube 13 are separately connected It fills between operated pneumatic valve 6 and second pressure monitoring point 9 first, second fills operated pneumatic valve 7 and third pressure monitoring point 10 Between, the second air-discharging movable valve 14 and third emptying operated pneumatic valve 15 are provided in the second evacuated tube 13, the second air-discharging is dynamic It is connected with third evacuated tube 16 between valve 14 and third emptying operated pneumatic valve 15, third evacuated tube 16 is connected with the external world.
Above-mentioned first, which is in charge of 2 and second, is in charge of 3 and is parallel with the first vacuum tube 17, and the both ends of the first vacuum tube 17 are separately connected It fills between operated pneumatic valve 6 and second pressure monitoring point 9 first, second fills operated pneumatic valve 7 and third pressure monitoring point 10 Between, the first Pneumatic vacuum valve 18 and the second Pneumatic vacuum valve 19, the first Pneumatic vacuum are provided on the first vacuum tube 17 The second vacuum tube 20, the second vacuum tube 20 and pumped vacuum systems phase are connected between valve 18 and the second Pneumatic vacuum valve 19 Even.
Above-mentioned each pressure monitoring point is provided with site pressure table and pressure transmitter.
Pressure signal is changed into electric signal by the pressure transmitter of above-mentioned each pressure monitoring point, and with pressure controller phase Even, above-mentioned each operated pneumatic valve is controlled by pressure controller and PLC program timer, and is driven by pneumatic air source.Pass through The program step that PLC program timer is set is automatically opened and is closed according to the pressure requirements of different step and is corresponding Valve.
Automatic filling process of the invention is as follows: the program step set according to PLC program timer successively into Row operation controls first first and fills operated pneumatic valve 6, and other operated pneumatic valves are closed, and the steel cylinder for filling station 4 to first fills Dress, after the pressure of second pressure monitoring point 9 reaches setting value, stops filling, and closes first and fills operated pneumatic valve 6, opens the Two fill operated pneumatic valve 7, and the steel cylinder for filling station 5 to second fills, and set when the pressure of third pressure monitoring point 10 reaches After definite value, stop filling.
When needing to empty pipeline, corresponding emptying operated pneumatic valve is opened, other operated pneumatic valves is closed, is arranged Do-nothing operation.
When needing to carry out steel cylinder exclusion residual gas before filling, when extracting vacuum, opens and vacuumize accordingly pneumatically Valve closes other operated pneumatic valves, carries out vacuum pumping.
Above-mentioned apparatus further includes control panel, and control button, buzzer and indicator light are provided on control panel.Buzzer It is used to indicate step with indicator light to complete or sound an alarm, control button is used to carry out the operation needed for other, such as switches artificial Operation etc..
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore: it is all according to The equivalence changes that structure of the invention, shape, principle are done, should all be covered by within protection scope of the present invention.

Claims (7)

1. a kind of industrial gasses automatic charging device, which is characterized in that described device includes the gas for connecting industrial gasses gas source Conveying supervisor (1), the end of gas conveying supervisor (1), which is connected with first and is in charge of (2) and second, to be in charge of (3), and first, which is in charge of (2), connects It connects first to fill station (4), second, which is in charge of (3) connection, second fills station (5), and described first is in charge of on (2) and is provided with first It fills operated pneumatic valve (6), second is in charge of on (3) and is provided with second and fills operated pneumatic valve (7), on the gas conveying supervisor (1) It is provided with first pressure monitoring point (8), first, which fills operated pneumatic valve (6) and first, fills and be provided with the second pressure between station (4) Power monitoring point (9), second, which fills operated pneumatic valve (7) and second, fills and is provided with third pressure monitoring point (10) between station (5), Each pressure monitoring point is connected with pressure controller, and each operated pneumatic valve is controlled by pressure controller and PLC time-program(me) Device control.
2. a kind of industrial gasses automatic charging device according to claim 1, which is characterized in that the gas conveying supervisor (1) it is provided on the first evacuated tube (11), the first evacuated tube (11) is located at after first pressure monitoring point (8), the first evacuated tube (11) the first air-discharging movable valve (12) is provided on, the first evacuated tube (11) is connected with the external world.
3. a kind of industrial gasses automatic charging device according to claim 1, which is characterized in that described first is in charge of (2) It is in charge of (3) with second to be parallel with the second evacuated tube (13), the both ends of the second evacuated tube (13) are connected to first and fill pneumatically It between valve (6) and second pressure monitoring point (9), second fills between operated pneumatic valve (7) and third pressure monitoring point (10), The second air-discharging movable valve (14) and third emptying operated pneumatic valve (15) are provided in two evacuated tubes (13), the second air-discharging moves valve It is connected with third evacuated tube (16) between door (14) and third emptying operated pneumatic valve (15), third evacuated tube (16) and extraneous phase Even.
4. a kind of industrial gasses automatic charging device according to claim 1, which is characterized in that described first is in charge of (2) It is in charge of (3) with second to be parallel with the first vacuum tube (17), the both ends of the first vacuum tube (17) are connected to first and fill pneumatically It between valve (6) and second pressure monitoring point (9), second fills between operated pneumatic valve (7) and third pressure monitoring point (10), The first Pneumatic vacuum valve (18) and the second Pneumatic vacuum valve (19), the first vacuum pneumatic valve are provided on one vacuum tube (17) It is connected with the second vacuum tube (20) between door (18) and the second Pneumatic vacuum valve (19), the second vacuum tube (20) is with vacuumizing System is connected.
5. a kind of industrial gasses automatic charging device according to claim 1, which is characterized in that each pressure monitoring point It is provided with site pressure table and pressure transmitter.
6. a kind of industrial gasses automatic charging device according to claim 1, which is characterized in that described device further includes control Panel processed is provided with control button, buzzer and indicator light on control panel.
7. a kind of industrial gasses automatic charging device described in Arbitrary Term in -6 according to claim 1, which is characterized in that described each Operated pneumatic valve is driven by pneumatic air source.
CN201811217135.8A 2018-10-18 2018-10-18 Automatic filling device for industrial gas Active CN109268680B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811217135.8A CN109268680B (en) 2018-10-18 2018-10-18 Automatic filling device for industrial gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811217135.8A CN109268680B (en) 2018-10-18 2018-10-18 Automatic filling device for industrial gas

Publications (2)

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CN109268680A true CN109268680A (en) 2019-01-25
CN109268680B CN109268680B (en) 2023-10-27

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CN114033965A (en) * 2021-11-12 2022-02-11 济南华信流体控制有限公司 Filling control system for single-component or multi-component gas

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