CN113309978A - Automatic gas mixing and inflating method - Google Patents

Automatic gas mixing and inflating method Download PDF

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Publication number
CN113309978A
CN113309978A CN202110564381.6A CN202110564381A CN113309978A CN 113309978 A CN113309978 A CN 113309978A CN 202110564381 A CN202110564381 A CN 202110564381A CN 113309978 A CN113309978 A CN 113309978A
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CN
China
Prior art keywords
gas
mixed gas
real time
gas mixing
inflation
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.)
Withdrawn
Application number
CN202110564381.6A
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Chinese (zh)
Inventor
袁学兵
戴丁志
李一挺
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.)
Keyilai Intelligent Electric Appliance Kunshan Co ltd
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Keyilai Intelligent Electric Appliance Kunshan 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.)
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Priority to CN202110564381.6A priority Critical patent/CN113309978A/en
Publication of CN113309978A publication Critical patent/CN113309978A/en
Withdrawn legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
    • B01F23/191—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means characterised by the construction of the controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/2134—Density or solids or particle number
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2211—Amount of delivered fluid during a period
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2213—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
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/031—Air

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

The invention discloses an automatic gas mixing and inflating method, which comprises the following steps: extracting the vacuum degree of the sealed cavity, and simultaneously monitoring the vacuum degree in the sealed cavity in real time; gas mixing step: a plurality of gas bottle devices are arranged, the corresponding flow control devices are controlled by the gas mixing and inflating control host to connect gas into the gas mixing cavity, and the density of the mixed gas in the gas mixing cavity is monitored in real time; and (3) inflating: the mixed gas in the gas mixing cavity is conveyed to an inflator, and the inflator inflates the gas in the sealed cavity of the product to be inflated; monitoring the pressure of the mixed gas in the inflator in real time; and (3) dynamic fine tuning: the mixed gas inflation control host receives the density signal of the mixed gas and the air pressure signal in the inflator in real time and adjusts the gas flow of each flow control device. The invention not only can accurately control the mixing proportion and the inflation pressure of the gas, but also can realize the configuration of the multi-component gas, and has the advantages of high gas mixing speed, high accuracy, excellent inflation efficiency and the like.

Description

Automatic gas mixing and inflating method
Technical Field
The invention relates to the technical field of electricity, in particular to the technical field of electric medium insulation, mixing and automation control, and specifically relates to an automatic gas mixing and inflating method.
Background
The demand and use of modern high-voltage electrical equipment enable electrical products to adopt a gas insulation technology to obtain better short-circuit breaking capacity and reliability, and a single arc extinguishing gas cannot meet the requirement of high performance at present, so that two or more gases need to be mixed to realize the purpose. At present, in the high voltage technology field, for example, patents 201910252824.0, 2017109526872 and 201910726127.4 and the like all propose various gas distribution methods, but the gas distribution precision and speed of the adopted device are low, and moreover, the automation degree is low, and the automatic gas mixing and charging are difficult to realize, so that the efficiency is low.
Disclosure of Invention
In order to overcome the defects, the invention provides an automatic gas mixing and inflating method which can realize automatic gas mixing and inflating and greatly improve the efficiency.
The technical scheme adopted by the invention for solving the technical problem is as follows:
an automatic gas mixing and inflating method comprises the following steps:
step 1, vacuumizing: the method comprises the following steps that vacuum degree of a sealed cavity of a product to be inflated is extracted by adopting vacuumizing equipment, the vacuum degree in the sealed cavity is monitored in real time, a monitored vacuum degree signal is transmitted to a gas mixing and inflating control host in real time, and the gas mixing and inflating control host controls the operation of the vacuumizing equipment according to the received vacuum degree signal;
step 2, gas mixing step: a plurality of gas cylinder devices are arranged, and each gas cylinder device is respectively connected into the gas mixing cavity through a corresponding flow control device; controlling the gas flow of each flow control device through the gas mixing and inflating control host, and sending the gas in each corresponding gas cylinder device into the gas mixing cavity according to set parameters for mixing; monitoring the density of the mixed gas in the gas mixing cavity in real time, and transmitting the monitored density signal of the mixed gas to the gas mixing and inflating control host in real time;
step 3, an inflation step: the mixed gas meeting the requirements in the gas mixing cavity is conveyed to an inflator, and the inflator inflates the gas in the sealed cavity of the product to be inflated; monitoring the pressure of the mixed gas in the inflator in real time, and transmitting the monitored pressure signal of the mixed gas to the mixed gas inflation control host in real time;
step 4, dynamic fine tuning: the mixed gas inflation control host receives the density signal of the mixed gas and the air pressure signal in the inflator in real time, and adjusts the gas flow of each flow control device according to the density signal and the air pressure signal.
As a further improvement of the invention, in the step 1, a vacuum pump is adopted as the vacuum pumping device.
As a further improvement of the present invention, in step 1, a vacuum degree measuring instrument is used to monitor the vacuum degree in the sealed cavity in real time.
As a further improvement of the present invention, in the step 2, the flow control device includes a pressure reducing valve, a solenoid valve, a flow meter, a heating component and a temperature measuring component.
As a further improvement of the present invention, in the step 2, a densimeter is disposed in the gas mixing cavity to monitor the density of the mixed gas in the gas mixing cavity in real time, and a density signal of the monitored mixed gas is transmitted to the gas mixing and inflating control host in real time.
As a further improvement of the invention, a plurality of densitometers are arranged in the gas mixing cavity.
As a further improvement of the present invention, in step 3, a barometer is disposed in the inflator to monitor the pressure of the mixed gas in the inflator in real time, and the monitored pressure signal of the mixed gas is transmitted to the mixed gas inflation control host in real time.
As a further improvement of the invention, a software unit, an algorithm unit, an MCU unit and a PLC unit are arranged in the automatic gas mixing and inflating host machine.
As a further improvement of the present invention, the inflator has an inflation capacity of 0.1 to 10 atmospheres.
As a further improvement of the invention, the gas contained in the gas cylinder devices is one of arc extinguishing gas of hydrogen, nitrogen, helium and sulfur hexafluoride.
The invention has the beneficial effects that: the automatic gas mixing and inflating method can accurately control the mixing proportion and the inflating pressure of gas, can realize the configuration of multi-element gas, can be directly used on a production line, and has the advantages of high gas mixing speed, high accuracy, excellent inflating efficiency and the like.
Drawings
FIG. 1 is a block flow diagram of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the method of the present invention.
The following description is made with reference to the accompanying drawings:
1-a gas cylinder device; 2-flow control device;
11-first cylinder device; 12-a second cylinder device;
13-third cylinder device; 21-first flow valve;
22-second flow valve; 23-third flow valve;
31-densitometer; 32-barometer;
4-gas mixing cavity; 5-inflator;
6-sealing the cavity; 7-vacuum pump;
8-automatic gas mixing and inflating host; 81-software cell;
82-an arithmetic unit; 83-MCU unit;
84-PLC Unit.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the automatic gas mixing and charging method of the present invention includes the following steps:
step 1, vacuumizing: the method comprises the following steps that vacuum degree of a sealed cavity of a product to be inflated is extracted by adopting vacuumizing equipment, the vacuum degree in the sealed cavity is monitored in real time, a monitored vacuum degree signal is transmitted to a gas mixing and inflating control host in real time, and the gas mixing and inflating control host controls the operation of the vacuumizing equipment according to the received vacuum degree signal;
step 2, gas mixing step: a plurality of gas cylinder devices are arranged, and each gas cylinder device is respectively connected into the gas mixing cavity through a corresponding flow control device; controlling the gas flow of each flow control device through the gas mixing and inflating control host, and sending the gas in each corresponding gas cylinder device into the gas mixing cavity according to set parameters for mixing; monitoring the density of the mixed gas in the gas mixing cavity in real time, and transmitting the monitored density signal of the mixed gas to the gas mixing and inflating control host in real time;
step 3, an inflation step: the mixed gas meeting the requirements in the gas mixing cavity is conveyed to an inflator, and the inflator inflates the gas in the sealed cavity of the product to be inflated; monitoring the pressure of the mixed gas in the inflator in real time, and transmitting the monitored pressure signal of the mixed gas to the mixed gas inflation control host in real time;
step 4, dynamic fine tuning: the mixed gas inflation control host receives the density signal of the mixed gas and the air pressure signal in the inflator in real time, and adjusts the gas flow of each flow control device according to the density signal and the air pressure signal.
In the step 1, a vacuum pump is used as a vacuum pumping device, preferably a rotary vane vacuum pump, which has high precision, and a high-power molecular pump device can be used for a product with high vacuum degree requirement, and the vacuum pump is provided with a vacuum degree measuring instrument to measure the vacuum degree of the cavity of the product, and data and an automatic gas mixing and inflating host machine are interacted in real time to be used for pumping the sealed cavity (such as a high-voltage direct current contactor and a high-voltage circuit breaker) of the product. Meanwhile, a vacuum degree measuring instrument is adopted to monitor the vacuum degree in the sealed cavity in real time.
In step 2, the flow control device comprises a pressure reducing valve, an electromagnetic valve, a flowmeter, a heating assembly and a temperature measuring assembly, the pressure reducing valve is used for reducing the pressure of a gas outlet of the gas cylinder, the electromagnetic valve and the flow test are used for controlling the gas flow and outputting and metering, the heating and temperature measurement are used for heating and temperature control of gas vaporization and used for guaranteeing the accuracy of the gas volume and proportion, the above elements can be controlled by an automatic gas mixing and inflating host, and parameters such as flow and temperature can be uploaded to the automatic gas mixing and inflating host to be used for gas supply amount and state analysis.
In addition, a plurality of densimeters are arranged in the gas mixing cavity to monitor the density of the mixed gas in the gas mixing cavity in real time, multi-dimensional monitoring is carried out, and the density signal of the monitored mixed gas is transmitted to the gas mixing and inflating control host in real time.
And 3, arranging a barometer in the inflation machine, monitoring the pressure of the mixed gas in the inflation machine in real time, and transmitting the monitored pressure signal of the mixed gas to the mixed gas inflation control host in real time.
The automatic gas mixing and inflating host machine is internally provided with a software unit, an algorithm unit, an MCU unit and a PLC unit and is used for calculating the components of mixed gas, controlling the flow control device, the gas mixing cavity, the vacuum pump and the inflator, and monitoring the real-time conditions of all parts in real time by data of a plurality of sensors. The inflator has the inflation capacity of 0.1-10 atmospheres, and has the gas pressure detection function, and data is connected with an automatic gas mixing and inflating host in real time.
In addition, the gas contained in the gas cylinder devices is one of arc extinguishing gas of hydrogen, nitrogen, helium and sulfur hexafluoride, or C4F7N,CO2And environment-friendly arc-extinguishing gas such as dry air and the like, but the novel environment-friendly gas is difficult to mix and needs a more precise algorithm for processing.
The invention can be used for automatic gas mixing and inflation of high-voltage direct-current contactor products, can also be used for automatic gas mixing and inflation of voltage switches of 10kV, 35kV, 110kV and the like, and can be used for gas compensation of an installed high-voltage switch and a gas leakage switch by using the equipment.
Referring to fig. 2, for a specific embodiment of the method of the present invention, three gases, i.e., gas 1, gas 2, and gas 3, are respectively filled into a plurality of gas cylinder devices 1, i.e., a first gas cylinder device 11, a second gas cylinder device 12, and a third gas cylinder device 13, and are connected to a gas mixing cavity 4 through a corresponding first flow valve 21, a second flow valve 22, and a third flow valve 23, a density meter 31 is disposed in the gas mixing cavity 4, an air outlet of the gas mixing cavity is connected to an inflator 5, a gas pressure meter 32 is disposed in the inflator 5, and an inflation inlet of the inflator is connected to a product to be inflated, e.g., a sealed cavity 6 of a high voltage direct current contactor.
The vacuum pump 7 is connected to the sealed cavity 6 and used for extracting the vacuum degree of the sealed cavity, and meanwhile, the vacuum degree measuring instrument 33 is arranged in the vacuum pump and used for monitoring the vacuum degree in the sealed cavity in real time.
The automatic mixed gas inflation host machine 8 is internally provided with a software unit 81, an algorithm unit 82, an MCU unit 83 and a PLC unit 84, the automatic mixed gas inflation host machine 8 respectively controls the working states of a plurality of flow valves, an inflator and a vacuum pump, and simultaneously collects monitoring signals of a densimeter, a barometer and a vacuum degree measuring instrument in real time, so that the working states of all parts are dynamically fine-tuned, and the inflation precision control is ensured.
Therefore, the automatic inflation method can accurately control the mixing proportion and the inflation pressure of the gas, can realize the configuration of the multi-component gas, can be directly used on a production line, and has the advantages of high gas mixing speed, high accuracy, excellent inflation efficiency and the like.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims (10)

1. An automatic gas mixing and inflating method is characterized by comprising the following steps:
step 1, vacuumizing: the method comprises the following steps that vacuum degree of a sealed cavity of a product to be inflated is extracted by adopting vacuumizing equipment, the vacuum degree in the sealed cavity is monitored in real time, a monitored vacuum degree signal is transmitted to a gas mixing and inflating control host in real time, and the gas mixing and inflating control host controls the operation of the vacuumizing equipment according to the received vacuum degree signal;
step 2, gas mixing step: a plurality of gas cylinder devices are arranged, and each gas cylinder device is respectively connected into the gas mixing cavity through a corresponding flow control device; controlling the gas flow of each flow control device through the gas mixing and inflating control host, and sending the gas in each corresponding gas cylinder device into the gas mixing cavity according to set parameters for mixing; monitoring the density of the mixed gas in the gas mixing cavity in real time, and transmitting the monitored density signal of the mixed gas to the gas mixing and inflating control host in real time;
step 3, an inflation step: the mixed gas meeting the requirements in the gas mixing cavity is conveyed to an inflator, and the inflator inflates the gas in the sealed cavity of the product to be inflated; monitoring the pressure of the mixed gas in the inflator in real time, and transmitting the monitored pressure signal of the mixed gas to the mixed gas inflation control host in real time;
step 4, dynamic fine tuning: the mixed gas inflation control host receives the density signal of the mixed gas and the air pressure signal in the inflator in real time, and adjusts the gas flow of each flow control device according to the density signal and the air pressure signal.
2. The automated mixed gas inflation method of claim 1, wherein: in the step 1, a vacuum pump is used as vacuum pumping equipment.
3. The automated mixed gas inflation method of claim 1, wherein: in the step 1, a vacuum degree measuring instrument is adopted to monitor the vacuum degree in the sealed cavity in real time.
4. The automated mixed gas inflation method of claim 1, wherein: in the step 2, the flow control device comprises a pressure reducing valve, an electromagnetic valve, a flow meter, a heating assembly and a temperature measuring assembly.
5. The automated mixed gas inflation method of claim 1, wherein: in the step 2, a densimeter is arranged in the gas mixing cavity to monitor the density of the mixed gas in the gas mixing cavity in real time, and a density signal of the monitored mixed gas is transmitted to the gas mixing and inflating control host in real time.
6. The automatic mixed gas inflation method according to claim 5, wherein: and a plurality of densimeters are arranged in the gas mixing cavity.
7. The automated mixed gas inflation method of claim 1, wherein: and in the step 3, a barometer is arranged in the inflation machine, the pressure of the mixed gas in the inflation machine is monitored in real time, and the monitored pressure signal of the mixed gas is transmitted to the mixed gas inflation control host in real time.
8. The automated mixed gas inflation method of claim 1, wherein: and a software unit, an algorithm unit, an MCU unit and a PLC unit are arranged in the automatic gas mixing and inflating host machine.
9. The automated mixed gas inflation method of claim 1, wherein: the inflator has an inflation capacity of 0.1 to 10 atmospheres.
10. The automated mixed gas inflation method of claim 1, wherein: the gas contained in the gas cylinder devices is arc extinguishing gas of one of hydrogen, nitrogen, helium and sulfur hexafluoride.
CN202110564381.6A 2021-05-24 2021-05-24 Automatic gas mixing and inflating method Withdrawn CN113309978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110564381.6A CN113309978A (en) 2021-05-24 2021-05-24 Automatic gas mixing and inflating method

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Application Number Priority Date Filing Date Title
CN202110564381.6A CN113309978A (en) 2021-05-24 2021-05-24 Automatic gas mixing and inflating method

Publications (1)

Publication Number Publication Date
CN113309978A true CN113309978A (en) 2021-08-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113731202A (en) * 2021-09-06 2021-12-03 苏州晟宇气体设备有限公司 Full-automatic intelligent distribution equipment
CN117212677A (en) * 2023-09-27 2023-12-12 广东电网有限责任公司电力科学研究院 Filling device and method for perfluorinated isobutyronitrile ternary mixed gas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113731202A (en) * 2021-09-06 2021-12-03 苏州晟宇气体设备有限公司 Full-automatic intelligent distribution equipment
CN117212677A (en) * 2023-09-27 2023-12-12 广东电网有限责任公司电力科学研究院 Filling device and method for perfluorinated isobutyronitrile ternary mixed gas

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