CN117404595A - Gas filling and distributing system of deep diving respirator gas cylinder - Google Patents

Gas filling and distributing system of deep diving respirator gas cylinder Download PDF

Info

Publication number
CN117404595A
CN117404595A CN202311707308.5A CN202311707308A CN117404595A CN 117404595 A CN117404595 A CN 117404595A CN 202311707308 A CN202311707308 A CN 202311707308A CN 117404595 A CN117404595 A CN 117404595A
Authority
CN
China
Prior art keywords
gas
premixed
gas cylinder
oxygen
mass
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
CN202311707308.5A
Other languages
Chinese (zh)
Other versions
CN117404595B (en
Inventor
计伟
陈大力
杨东星
李俊明
张忠阳
张然
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.)
FUSHUN FUYUN ANYI LIFESAVING EQUIPMENT CO LTD
Original Assignee
FUSHUN FUYUN ANYI LIFESAVING EQUIPMENT 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 FUSHUN FUYUN ANYI LIFESAVING EQUIPMENT CO LTD filed Critical FUSHUN FUYUN ANYI LIFESAVING EQUIPMENT CO LTD
Priority to CN202311707308.5A priority Critical patent/CN117404595B/en
Publication of CN117404595A publication Critical patent/CN117404595A/en
Application granted granted Critical
Publication of CN117404595B publication Critical patent/CN117404595B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • 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
    • F17C13/023—Special adaptations of indicating, measuring, or monitoring equipment having the mass 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
    • 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
    • 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
    • F17C2250/0421—Mass or weight of the content of the vessel

Abstract

The invention discloses a gas charging and distributing system of a deep diving respirator gas cylinder, which comprises the following components: the air distribution system, the air charging system, the premixed air cylinder and the deep diving breathing apparatus air cylinder; the gas distribution system comprises: the device comprises a nitrogen gas source bottle, an oxygen gas source bottle, a helium gas source bottle, a nitrogen pressurizing device, an oxygen pressurizing device, a helium pressurizing device and a vacuum pump; the vacuum pump is used for vacuumizing the premixed gas cylinder; the nitrogen pressurizing device is used for charging nitrogen with the first premixing quality into the premixing gas cylinder in a first pressure range; the helium supercharging device is used for charging helium with a second premixing mass into the premixing gas cylinder in a second pressure range; the oxygen pressurizing device is used for charging the oxygen with the third premixing quality into the premixing gas cylinder in a third pressure range; the inflation system comprises a gas mixing pressurization device; the mixed gas pressurizing device is used for charging mixed gas in the premixed gas cylinder into the deep diving breathing apparatus gas cylinder in a fourth pressure range. The gas distribution process of the gas filling and distributing system is not influenced by environmental factors such as pressure, temperature and the like, and the gas distribution is ensured to be more accurate.

Description

Gas filling and distributing system of deep diving respirator gas cylinder
Technical Field
The invention relates to the field of gas mixing and inflation of deep diving respirators, in particular to a gas charging and distributing system of a gas cylinder of a deep diving respirator, which is used for distributing mixed gas serving as artificial air and charging the mixed gas into the gas cylinder of the deep diving respirator.
Background
The deep diving breathing apparatus is diving equipment which is necessary to be equipped for deepwater, large-scale and long-term underwater construction and salvage operation, and is widely applied to military and civil fields such as rescue of a failure submarine, submarine construction operation, underwater resource exploration, marine science investigation and the like as the only personal diving protection equipment which can enable a diver to be directly exposed to a high-pressure environment to carry out underwater operation.
It is known that in deep sea exploration, divers need to face a very high pressure environment, and if the pressure reduction treatment is improper after diving, the pressure reduction disease is extremely liable to occur, and the pressure reduction disease is a systemic disease caused by formation of bubbles inside and outside blood vessels and tissues due to that the gas originally dissolved in the body exceeds a supersaturation limit due to improper pressure reduction after operation in a high pressure environment. In order to ensure the safety of divers and reduce the occurrence of decompression sickness, the mixed gas is widely applied to deep diving, for example, in 2019, french divers dive to 10928 meters deep in a Malaysia sea ditch, a record of deep diving of human beings is created, helium oxygen mixed gas is used for the diving, the occurrence of decompression sickness is successfully avoided, and the safety and effectiveness of the helium oxygen mixed gas in deep diving are proved. The mixed gas is mixed according to a certain proportion, and in deep water diving, helium can better penetrate through body tissues of a diver due to smaller molecules of the helium, so that the risk of decompression sickness is reduced, the density of air can be reduced, and the diver can easily move underwater. Meanwhile, according to the actual environment of underwater operation, the user can adjust the oxygen and nitrogen content in the mixed gas according to the requirements, so as to meet the requirements of the underwater operation under different conditions. The compressed air, namely the ratio of nitrogen to oxygen is approximately 79: a trained diver can use high oxygen air, i.e. 32% oxygen. With the development of technology, more efficient gas mixing ratios will be developed in the future, thereby improving diver safety and comfort. In addition, along with the continuous expansion of the deep sea exploration field, the nitrogen helium oxygen mixed gas plays an important role in the aspects of ocean resource development, scientific research and the like.
The proportioning precision of the mixed gas is a key for ensuring the safety of divers and smoothly completing deep diving work. The deep diving respirator gas cylinder as the core component of the deep diving exhaler needs to be subjected to gas distribution and gas filling, and when the gas distribution is performed, various gases with corresponding proportions need to be introduced into the premixed gas cylinder for mixing according to the use requirement, and then the gas filling is performed, namely: and pressurizing and filling the mixed gas prepared in the premixed gas cylinder into a deep diving breathing apparatus gas cylinder. The gas distribution work of the early deep diving breathing apparatus is carried out by adopting a method of eye-watch and hand-mark recalculation, and the method has the biggest defects of low gas filling and gas distribution efficiency and low gas distribution precision, needs repeated gas filling correction and influences the safe use of equipment. The conventional mixed gas charging and distributing system of the deep submerged respirator adopts a traditional gas distribution method by means of partial pressure, and as the gas is compressed in the actual gas distribution process, according to an ideal gas state equation PV=nRT, the temperature of a premixed gas cylinder can be increased in a nonlinear manner along with the change of the gas pressure, and the gas distribution pressure in the premixed gas cylinder can be influenced, so that the gas distribution precision of the gas distribution method by means of partial pressure is difficult to ensure. And because the filling and gas-distributing process is to calculate the pressure value of various gases according to the preset pressure of the mixed gas cylinder, then use the gas cylinder containing a certain gas as the premixed gas cylinder, so that the excessive gas exceeding the calculated gas pressure value in the gas cylinder needs to be discharged first, and a great deal of gas sources are wasted.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention aims to provide a gas filling and distributing system of a deep-diving breathing apparatus gas cylinder so as to solve the problems of low gas distribution precision, low gas distribution efficiency and waste of a large amount of a certain gas source gas in the existing gas distribution system of the deep-diving breathing apparatus.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a gas filling system for a deep-diving breathing apparatus gas cylinder, comprising: the air distribution system, the air charging system, the premixed air cylinder and the deep diving breathing apparatus air cylinder;
the gas distribution system comprises: the device comprises a nitrogen gas source bottle, an oxygen gas source bottle, a helium gas source bottle, a nitrogen pressurizing device, an oxygen pressurizing device, a helium pressurizing device and a vacuum pump;
the vacuum pump is used for vacuumizing the premixed gas cylinder; the nitrogen pressurizing device is used for charging nitrogen with a first premixing mass into the premixing gas cylinder in a first pressure range; the helium supercharging device is used for charging helium with a second premixing mass into the premixing gas cylinder in a second pressure range; the oxygen pressurizing device is used for charging the oxygen with a third premixing quality into the premixing gas cylinder in a third pressure range;
the inflation system comprises a gas mixing pressurization device;
And the mixed gas pressurizing device is used for charging the mixed gas in the premixed gas cylinder into the deep-diving breathing apparatus gas cylinder in a fourth pressure range.
Further, the oxygen pressurizing device comprises an oxygen pneumatic pump and a driving air pump, wherein the oxygen pneumatic pump is used for pressurizing oxygen to be filled into the premixed air cylinder, and the driving air pump is used for providing a driving air source for the oxygen pneumatic pump.
Further, the nitrogen pressurizing device and the helium pressurizing device respectively comprise electric solid lubrication booster pumps, and the electric solid lubrication booster pumps are respectively used for boosting the nitrogen and the helium to be filled into the premixed gas cylinder.
Further, the gas distribution system further comprises a weighing device, wherein the weighing device is used for weighing the mass of the premixed gas cylinder in real time.
Further, the gas distribution system also comprises a computer for calculating a second premixed mass of helium and a third premixed mass of oxygen when the gas distribution system is used for preparing helium-oxygen mixed gas of the deep diving breathing apparatus.
Further, the gas distribution system further comprises a control device, wherein the control device is used for controlling the helium supercharging device to boost the helium to a second pressure range and then charge the premixed gas cylinder, and when the weighing device weighs the mass of the premixed gas cylinder to be the sum of the mass of the premixed gas cylinder after vacuumizing and the second premixed mass of the helium, the control device is used for controlling to stop charging the helium into the premixed gas cylinder.
Further, the control device is further used for controlling the oxygen pressurizing device to pressurize the oxygen to a third pressure range and then filling the oxygen into the premixed gas cylinder, and when the weighing device weighs the mass of the premixed gas cylinder to be the sum of the mass of the premixed gas cylinder after vacuumizing, the second premixed mass of helium and the third premixed mass of oxygen, the control device is used for controlling stopping filling the oxygen into the premixed gas cylinder.
Further, the gas distribution system also comprises a computer, and when the gas distribution system prepares the nitrogen helium oxygen mixed gas of the deep-diving breathing apparatus, the computer is used for calculating the first premixing mass of nitrogen, the second premixing mass of helium and the third premixing mass of oxygen.
Further, the gas distribution system further comprises control equipment, wherein the control equipment is used for controlling the nitrogen supercharging device to boost the nitrogen to a first pressure range and then charge the premixed gas cylinder, and when the weighing device weighs the mass of the premixed gas cylinder to be the sum of the mass of the premixed gas cylinder and the first premixed mass of the nitrogen after vacuumizing, the control equipment is used for controlling to stop charging the nitrogen into the premixed gas cylinder.
Further, the control device is further used for controlling the helium supercharging device to boost the helium to a second pressure range and then charging the premixed gas cylinder, and when the weighing device weighs the mass of the premixed gas cylinder to be the sum of the mass of the premixed gas cylinder after vacuumizing, the first premixed mass of nitrogen and the second premixed mass of helium, the control device is used for controlling to stop charging the premixed gas cylinder with the helium.
Further, the control device is further used for controlling the oxygen pressurizing device to pressurize the oxygen to a third pressure range and then filling the oxygen into the premixed gas cylinder, and when the weighing device weighs the mass of the premixed gas cylinder to be the sum of the mass of the premixed gas cylinder, the first premixed mass of nitrogen, the second premixed mass of helium and the third premixed mass of oxygen after vacuumizing, the control device is used for controlling stopping filling the oxygen into the premixed gas cylinder.
Further, the gas distribution system further comprises an oxygen concentration analyzer, wherein the oxygen concentration analyzer is used for detecting the oxygen concentration of the mixed gas in the prepared premixed gas cylinder；
When the oxygen concentration isNot requiring oxygen concentration->When the allowable error range of (2) is within the allowable error range, the total mass of the premix cylinder is weighed by the weighing device at the moment>If the measured oxygen concentration +.>Less than the required oxygen concentrationCalculating the mass of oxygen required to be supplemented to the premixed gas cylinder by the computer according to the following formula>And supplementing the premix cylinder with a mass of +.>Oxygen of (2);
if the measured oxygen concentration isGreater than the required oxygen concentration->Calculating by the computer the mass +_ of helium needed to supplement the premix cylinder as follows >And supplementing the premixed gas cylinder with the mass in a second pressure range as followsIs a helium gas of (2);
in the above-mentioned description of the invention,the mass of the premixed gas cylinder after vacuumizing and before filling the mixed gas.
Further, when oxygen is supplemented into the premixed gas cylinder, the weighing device weighs the premixed gas cylinder to have the mass ofWhen the premixed gas cylinder is in a closed state, the control equipment is also used for controlling stopping filling oxygen into the premixed gas cylinder;
when helium is supplemented into the premixed gas cylinder, the weighing device weighs the premixed gas cylinder to have the mass ofAnd when the premixed gas cylinder is in a closed state, the control equipment is also used for controlling the stopping of filling helium into the premixed gas cylinder.
Further, the gas distribution system further comprises a shaking device, and the shaking device is used for shaking the mixed gas filled into the premixed gas cylinder.
Further, the inflation system further comprises: an oxygenation air source bottle, an oxygenation supercharging device; the oxygenation pressurization device is used for pressurizing oxygen to a fifth pressure range and filling the deep-diving breathing apparatus gas cylinder.
Further, the air mixing pressurization device comprises an air mixing pneumatic pump and an air mixing driving air pump, wherein the air mixing pneumatic pump is used for boosting mixed gas to be filled into the deep submerged respirator gas cylinder, and the air mixing driving air pump is used for providing a driving air source for the air mixing pneumatic pump.
Further, the oxygenation pressurization device comprises an oxygenation pneumatic pump and a gas mixing driving air pump, wherein the oxygenation pneumatic pump is used for pressurizing oxygen to be filled into the deep-diving respirator air cylinder, and the gas mixing driving air pump is used for providing a driving air source for the oxygenation pneumatic pump.
Further, the inflation system further comprises an inflation protection box, and the deep-diving respirator gas cylinder is arranged in the inflation protection box.
In the gas filling and distributing system of the deep-diving breathing apparatus gas cylinder, after the gas filling mass of each gas is calculated according to the proportion of each gas in the mixed gas to be distributed, each gas with corresponding mass is filled into the premixed gas cylinder with corresponding pressure, and the distribution of the corresponding mixed gas of the premixed gas cylinder is completed. The gas filling and distributing system disclosed by the invention is used for completing the preparation of the mixed gas in the premixed gas cylinder by converting the volume of various gases in the mixed gas into the mass ratio, ensuring that various gases can be smoothly filled into the premixed gas cylinder under corresponding pressure, ensuring that the gas distribution process is not influenced by environmental factors such as pressure, temperature and the like, ensuring that the gas distribution precision is more accurate, and then filling the mixed gas in the premixed gas cylinder into the deep-diving breathing gas cylinder under corresponding pressure, thereby ensuring the gas mixing precision in the deep-diving breathing gas cylinder.
Drawings
FIG. 1 is a schematic diagram of the composition of an air distribution system in an air charging and distribution system of a deep-diving breathing apparatus air cylinder provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of the composition of an inflation system in an inflation system for a deep-diving breathing apparatus gas cylinder provided by an embodiment of the present invention;
in the figure:
101-a nitrogen source bottle; 102, a helium gas source bottle; 103-an oxygen source bottle; 104-a nitrogen pneumatic pump; 105-helium gas pneumatic pump; 106-an oxygen pneumatic pump; 107. 108-premixing the gas cylinder; 109. 110-a weighing device; 111-a vacuum pump; 112-driving an air pump; 113. 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126-solenoid valves; 127. 128-pneumatic valve; 129-oxygen concentration analyzer; 130-a two-stage pressure relief valve;
201-premixing gas cylinder; 202, an oxygenation air source bottle; 203-a gas mixing pneumatic pump; 204-an oxygenation pneumatic pump; 205-a gas mixing driving air pump; 206-an inflatable protective box; 207. 208, 209, 210, 211, 212, 213-solenoid valves.
Detailed Description
In order that those skilled in the art will better understand the solution of the present invention, the following description of the technical solution in the embodiment of the present invention will be clearly and completely described with reference to the accompanying drawings in which it is apparent that the described examples are only a part of examples, not all examples of the present invention. All other embodiments obtained by those skilled in the art based on the examples herein shall fall within the scope of the present invention without making any inventive effort.
In the description of the present embodiment, the terms "first," "second," and the like are used merely to distinguish similar objects and should not be construed as a specific order or sequence, it being understood that such uses may be interchanged where appropriate.
Examples
As shown in fig. 1-2, this embodiment provides a gas filling and distributing system of a deep diving breathing apparatus gas cylinder, including: the gas distribution system, the gas filling system, the premixed gas cylinders 107 and 108 and the deep diving breathing apparatus gas cylinder.
Referring to fig. 1, the gas distribution system includes: a nitrogen gas source bottle 101, an oxygen gas source bottle 103, a helium gas source bottle 102, a nitrogen pressurizing device, an oxygen pressurizing device, a helium pressurizing device and a vacuum pump 111.
The nitrogen source bottle 101 is used for supplying nitrogen for the gas filling system; helium source bottle 102 is used to supply helium to the inflation gas system; the oxygen source bottle 103 is used to supply oxygen to the inflation gas system.
The gas distribution system of the present invention can simultaneously charge a plurality of premixed gas cylinders with a mixed gas, and in this embodiment, the gas distribution system of the present invention has two premixed gas cylinders 107 and 108.
The vacuum pump 111 is used for respectively vacuumizing the premixed gas cylinders 107 and 108, so that the premixed gas cylinders 107 and 108 reach a specified negative pressure state, and preparation work is performed before gas distribution for gas distribution, so that the accuracy of gas distribution precision is ensured. The vacuum pump of the embodiment can adopt a general rotary vane vacuum pump, and the pumping speed can reach 4.1m 3 And/h, the pressure of the premixed gas cylinders 107 and 108 can be reduced to-0.05 MPa to-0.07 MPa within 1 min.
The nitrogen pressurizing device is used for charging nitrogen with the first premixing quality into the premixing gas cylinder in a first pressure range; the helium supercharging device is used for charging helium with a second premixing mass into the premixing gas cylinder in a second pressure range; the oxygen pressurizing device is used for charging the third premixed mass of oxygen into the premixed gas cylinder in a third pressure range.
The first premixed mass of nitrogen, the second premixed mass of helium, and the third premixed mass of oxygen may be calculated using the following methods:
according to the ideal gas equation:
wherein P is the pressure (Pa) of the gas, and V is the volume (m 3 ) M is the gas mass (g), R is the molar gas constant (8.31441 Pa. M 3 K, T is the gas temperature (K), M is the molar mass (g/mol);
the mass of each distribution component of the mixed gas is as follows:
in the method, in the process of the invention,for filling a premix cylinder with a certain mass (g) of gas, ->The pre-set pressure value (MPa) of the premixed cylinder for preparing the mixed gas,/is>Is the volume (m 3 ），/>R is the molar gas constant (8.31441 Pa. M 3 /mol﹒K），/>For the preparation of the gas mixture, the gas temperature (K) is +.>The molar mass (g/mol) of the gas is indicated.
From the ideal gas equation, the mass is proportional to the volume, while the mass of the gas is not affected by temperature and pressure. The concentration ratio of various gases in the mixed gas is actually the mass ratio of various gases, and the gas distribution method of the application is a method for directly measuring the mass of various gases in the gas distribution process and controlling the mass ratio of the mixed gas after gas distribution to realize concentration ratio gas distribution, so the method is the most direct gas distribution method. Because the mixed gas is prepared by using a method for weighing the mass, the mass measurement is the only factor influencing the gas distribution precision, and the higher the mass measurement precision is, the higher the gas distribution precision is.
The original respirator adopts a partial pressure air distribution method, and the partial pressure air distribution method is obtained according to Dalton's law. Dalton's law describes the relationship between the total pressure of a mixed gas and the partial pressure of each component gas, namely: when the temperature is unchanged, the total pressure of the mixed gas is equal to the sum of the partial pressures of the constituent gases. The expression is as follows:
the partial pressure value of a certain component gas can be calculated by the total pressure of the gas and the percentages of the component gases, and the formula is as follows:
In the method, in the process of the invention,indicating the partial pressure of a certain gas, +.>For the total pressure of the mixture of gases>Representing the percentage of the gas in the mixed gas. The Dalton law can be established under the condition of unchanged temperature through the formula, namely the temperature and the pressure are factors influencing the gas distribution precision of the gas distribution method. The temperature is considered to be unchanged in the gas distribution process by the partial pressure gas distribution method, but in practice, the temperature of the gas is increased along with the increase of the pressure of the gas in the gas distribution process, and meanwhile, the gas and the environment have heat exchange, so that the actual temperature of the gas is increased in a nonlinear way, and the gas distribution precision of the partial pressure gas distribution method is difficult to be accurately calculated according to the Dalton law.
In summary, compared with the partial pressure gas distribution method, the method adopting mass gas distribution is simple in principle, easy to apply and high in gas distribution precision.
The first pressure range, the second pressure range, and the third pressure range are all greater than or equal to 2.5MPa.
In this embodiment, the nitrogen pressurization device includes a nitrogen pneumatic pump 104 and a driving air pump 112, the nitrogen pneumatic pump 104 is used for pressurizing nitrogen to be filled into the premixed air cylinder, the helium pressurization device includes a helium pneumatic pump 105 and a driving air pump 112, the helium pneumatic pump 105 is used for pressurizing helium to be filled into the premixed air cylinder, the oxygen pressurization device includes an oxygen pneumatic pump 106 and a driving air pump 112, the oxygen pneumatic pump 106 is used for pressurizing oxygen to be filled into the premixed air cylinder, and the driving air pump 112 is respectively used for providing driving air sources for the nitrogen pneumatic pump 104, the helium pneumatic pump 105 and the oxygen pneumatic pump 106.
The working power of the nitrogen pneumatic pump 104, the helium pneumatic pump 105 and the oxygen pneumatic pump 106 are all gas driven, the driving air pump 112 is used for supplying air respectively, the nitrogen pneumatic pump 104, the helium pneumatic pump 105 and the oxygen pneumatic pump 106 are all pneumatic booster pumps, no electric arc or spark exists, the device is suitable for being applied to flammable and explosive places, the output pressure is stable, the generated pulse is small, and the device has higher safety when the oxygen is pressurized. The driving air pump 112 of the present embodiment adopts a general-purpose air compressor, and has a pressure stop function of up to 0.8 MPa.
The drive air pump 112 of the present embodiment is also used to provide drive air to the pneumatic valves 127, 128.
In other embodiments, the nitrogen pressurization device and the helium pressurization device each comprise an electric solid lubrication booster pump for boosting nitrogen and helium to be charged into the premix cylinder, respectively.
The gas distribution system of this embodiment also includes weighing devices 109, 110, weighing devices 119 and 110 for weighing the mass of premix cylinders 107 and 108, respectively, in real time. The weighing devices 109, 110 may be electronic weighing devices.
The weighing devices 109 and 110 of the present embodiment are used for weighing the mass of the premixed gas cylinders 107 and 108 in real time during the whole gas distribution process, and take a premixed gas cylinder of 40L as an example, the mass in the vacuumized state is about 50kg, so that the weighing range of the weighing device for weighing the mass needs to reach about 60kg, and the higher the mass weighing precision is, the higher the gas distribution precision is, and the higher the weighing precision of the weighing device is needed. Then, a measuring device with a measuring range of 60kg or more and high weighing precision is required to be selected for gas distribution by adopting a weighing mass method. For example, the weighing range of the weighing device is 80kg, the weighing precision is 1g, and the requirement of gas distribution is completely met; for another example, the weighing range of the weighing device is 120kg, the precision reaches 1X 30000e, the verification graduation value is 5g, the specific gravity of oxygen is 1.429g/L, the mass of oxygen is 2858g according to the calculation of filling 25% of oxygen at 40L/20MPa, and the precision of an electronic balance is 5g, so that the weighing error calculated theoretically is 0.175%, and the requirements of the weighing range and the weighing precision are met.
The gas distribution system of the embodiment comprises a nitrogen gas path, a helium gas path and an oxygen gas path, and can be used for preparing helium-oxygen mixed gas and nitrogen-helium-oxygen mixed gas which are mixed gas commonly used for the deep-diving breathing apparatus, and the composition and the functions of each part of the gas distribution system of the gas cylinder of the deep-diving breathing apparatus are described in detail by taking the preparation of the two gases as an example. The gas filling system of this embodiment may also be configured to mix a nitrogen-oxygen mixture and a nitrogen-helium mixture, if desired.
The air distribution system of the present embodiment further includes a computer (not shown in the figures) and a control device.
When the gas distribution system is used for preparing helium-oxygen mixed gas, the computer is used for calculating the second premixing quality of helium and the third premixing quality of oxygen. The control device is used for controlling the helium supercharging device to boost the helium to a second pressure range and then charging the helium into the premixed gas cylinders 107 and 108, and when the weighing devices 109 and 110 weigh the mass of the premixed gas cylinders 107 and 108 to be the mass of the premixed gas cylinders after vacuumizingWhen summed with the second premixed mass of helium (calculated helium charge mass), the control device is configured to control stopping charging of the premixed cylinders 107, 108 with helium. The control device is also used for controlling the oxygen pressurizing device to pressurize the oxygen to the third pressure range and then filling the oxygen into the premixed gas cylinders 107 and 108, and when the weighing devices 109 and 110 weigh the premixed gas cylinders 107 and 108, the mass of the premixed gas cylinders is equal to the mass of the premixed gas cylinders after vacuumizing >The control device is adapted to control stopping the oxygen filling to the premix cylinders 107, 108 when the second premix mass of helium and the third premix mass of oxygen (calculated oxygenation mass) sum.
When the charging gas system is used for preparing nitrogen-helium-oxygen mixed gas of the deep-diving breathing apparatus, the computer is used for calculating a first premixing mass of nitrogen and a second premixing mass of heliumAnd a third premix quality of oxygen. The control device is used for controlling the nitrogen pressurizing device to pressurize the nitrogen to a first pressure range and then charge the pre-mixed gas cylinders 107 and 108, and when the weighing devices 109 and 110 weigh the pre-mixed gas cylinders 107 and 108 to be the mass of the pre-mixed gas cylinders after vacuumizingWhen summed with the first premixed mass of nitrogen (calculated nitrogen charge mass), the control device is used to control stopping the charging of nitrogen into the premixed cylinders 107, 108. The control device is also used for controlling the helium supercharging device to boost the helium to a second pressure range and then charging the helium into the premixed gas cylinders 107 and 108, and when the weighing devices 109 and 110 weigh the mass of the premixed gas cylinders 107 and 108 to be the mass of the premixed gas cylinders after vacuumizing +.>The control device is adapted to control stopping the filling of helium gas into the premix cylinders 107, 108 when the first premix mass of nitrogen gas and the second premix mass of helium gas (calculated filling mass of helium gas) are summed. The control device is further configured to control the oxygen pressurizing device to pressurize the oxygen to the third pressure range and then fill the premixed cylinders 107 and 108, and when the weighing devices 109 and 110 weigh the mass of the premixed cylinders 107 and 108 to be the sum of the mass of the premixed cylinders after the vacuum pumping, the first premixed mass of the nitrogen, the second premixed mass of the helium and the third premixed mass of the oxygen (calculated oxygenation mass), the control device is configured to control stopping of the filling of the premixed cylinders 107 and 108 with the oxygen.
The control device of this embodiment may also communicate with a computer that calculates a first premixed mass of nitrogen, a second premixed mass of helium, and a third premixed mass of oxygen, so that the control device obtains specific values of the first premixed mass of nitrogen, the second premixed mass of helium, and the third premixed mass of oxygen.
The gas distribution system of the present embodiment further includes a shaking device (not shown in the figure) for shaking the mixed gas (helium-oxygen mixed gas or nitrogen-helium-oxygen mixed gas, etc.) filled in the premixed cylinders 107, 108. The centrifugal force principle is fully utilized, the premixed gas cylinders 107 and 108 are repeatedly swung, the mixing speed of various gas components in the premixed gas cylinders 107 and 108 is accelerated, and the shaking efficiency and the quality of the mixed gas are improved. The shaking device has the functions of setting rotating speed, shaking amplitude, shaking time and the like, the traditional shaking mode has two functions of standing and manually shaking, the manual shaking (rolling mode) and standing mixed gas have long gas mixing time, and the aim of completely and uniformly mixing cannot be achieved. The shaking device reduces the mixing time of the gas in the premixed gas cylinders 107 and 108 after gas distribution, greatly improves the gas mixing efficiency, and ensures that the mixed gas in the premixed gas cylinders 107 and 108 is fully mixed and stabilized.
It should be noted that the gas distribution system of the present embodiment may be used not only for gas distribution, but also for oxygen concentration detection of the premixed cylinders 107, 108 that are prepared with mixed gas, and for performing the gas supplementing operation when the oxygen concentration is not within the allowable error range of the required oxygen concentration, so as to make the oxygen concentration in the premixed cylinders meet the gas distribution requirement by gas supplementing.
The gas distribution system further comprises an oxygen concentration analyzer 129, wherein the oxygen concentration analyzer 129 is used for respectively detecting the oxygen concentration of the mixed gas in the prepared premixed gas cylinders 107 and 108。
When the oxygen concentration isNot requiring oxygen concentration->Within the allowable error range of (1), the weighing devices 109, 110 weigh the total mass of the premix cylinders 107, 108 at that time, respectively +.>(premix cylinders 107 and 108 are weighed +.>）；
If the measured oxygen concentration isLess than the required oxygen concentration->The computer calculates the mass +.A necessary to supplement the premixed cylinder 107 or 108 with oxygen according to the following formula>And the premixed gas cylinder 107 or 108 is supplemented with a mass +.about.1% by the oxygen pressurizing means in a third pressure range>Oxygen of (2);
if the measured oxygen concentration isGreater than the required oxygen concentration->The computer calculates the mass ++necessary to supplement helium to the premix cylinder 107 or 108 according to the following formula >And the premixed gas cylinder 107 or 108 is supplemented with a mass +.>Is a helium gas of (2);
in the above，The mass of the premix cylinder 107 or 108, which is evacuated before filling with the mixture gas, +.>To require the mass of the mixed gas filled in the premix cylinder 107 or 108, < >>To require the quality of oxygen charged into premix cylinders 107 or 108.
It should be noted that whether helium or nitrogen-helium is contained in the premix cylinder, oxygen needs to be replenished to the premix cylinder when the detected oxygen concentration is less than the desired oxygen concentration, and helium needs to be replenished to the premix cylinder when the detected oxygen concentration is greater than the desired oxygen concentration, because helium is more stable than nitrogen.
When oxygen is replenished into the premix cylinders 107, 108, the weighing devices 109, 110 weigh the mass of the premix cylinders 107, 108 toThe control device is also used to control stopping the oxygen filling of the premix cylinders 107, 108 when.
When helium is replenished into the premix cylinders 107, 108, the weighing devices 109, 110 weigh the mass of the premix cylinders 107, 108 to beThe control device is also used to control stopping the filling of helium into the premix cylinders 107, 108 when it is time.
It should be noted that the gas distribution system of the invention can be used for not only initial gas mixing of the premixed gas cylinder, but also detecting whether the oxygen concentration in the premixed gas cylinder meets the gas distribution requirement, and when the oxygen concentration does not meet the gas distribution requirement, the gas distribution system can also supplement oxygen or helium with corresponding quality into the premixed gas cylinder.
Referring to fig. 1, the operation of the gas distribution system of this embodiment will be described by taking as an example the charging of helium-oxygen mixture gas and nitrogen-helium-oxygen mixture gas into a premixed gas cylinder.
Example 1:
taking 1 bottle of helium-oxygen mixed gas (95% of helium and 5% of oxygen) with 15MPa and 40L of helium-oxygen mixed gas at normal temperature as an example, the second premixed mass of helium and the third premixed mass of oxygen filled in the premixed gas bottle are calculated by a computer, and the calculation process is as follows:
helium mass in the mixed gas is used by pure helium (not less than 99.99 percent)Is that
Using the mass of oxygen in a mixture of medical oxygen (not less than 99.5%)Is that
Total mass of mixed gasIs that
After obtaining the helium mass and the oxygen mass to be filled into the premixed gas cylinders 107 and 108 (helium and oxygen with the mass are filled into each premixed gas cylinder), opening the electromagnetic valves 122, 123 and 124 and the pneumatic valves 127 and 128, vacuumizing the premixed gas cylinders 107 and 108 by using the vacuum pump 111, and closing the electromagnetic valves 122, 123 and 124 and the pneumatic valves 127 and 128 when the premixed gas cylinders 107 and 108 meet the requirement of the vacuum degree, namely the pressure of the premixed gas cylinders 107 and 108 is reduced to-0.05 MPa to-0.07 MPa; when the pre-mixed gas cylinders 107 and 108 are filled with helium, solenoid valves 114 and 120 are opened, the helium in the helium gas source cylinder 102 enters the helium gas pneumatic pump 105 through a pipeline, a driving gas pump 112 is utilized to supply driving gas for the helium gas pneumatic pump 105 so as to boost the helium gas, the helium gas is boosted to be more than or equal to 2.5 MPa, solenoid valves 117, 122, 123 and pneumatic valves 127 and 128 are opened, the boosted helium gas is filled into the pre-mixed gas cylinders 107 and 108, when weighing devices 109 and 110 weigh the mass of the pre-mixed gas cylinders 107 and 108 to be the sum of the mass of the pre-mixed gas cylinders 107 and 108 after vacuumizing and the second pre-mixed mass of the helium gas (each pre-mixed gas cylinder can correspond to the second pre-mixed mass of one helium gas cylinder, in the embodiment, the specifications of the pre-mixed gas cylinders 105 and 106 are the same, and the second pre-mixed mass of the two helium gases are the same), solenoid valves 117, 122 and 123 and pneumatic valves 127 and 128 are closed, and the helium gas cylinders 122 and pneumatic valves 127 are closed if the pre-mixed gas cylinder 107 reaches the sum of the mass, and the pneumatic valves 127 are closed; when the pre-mixed gas cylinders 107 and 108 are filled with oxygen, the electromagnetic valves 115 and 121 are opened, the oxygen in the oxygen source gas cylinder 103 enters the oxygen gas pump 106 through a pipeline, the driving gas pump 112 is utilized to supply driving gas for the oxygen gas pump 106 so as to boost the oxygen to be more than or equal to 2.5 MPa, the electromagnetic valves 118, 122 and 123 and the pneumatic valves 127 and 128 are opened, the pressurized oxygen is filled into the pre-mixed gas cylinders 107 and 108, when the weighing devices 109 and 110 weigh the mass of the pre-mixed gas cylinders 107 and 108 to be vacuumized, the mass of the pre-mixed gas cylinders 107 and 108, the second premixed mass of helium (each of the pre-mixed gas cylinders can correspond to the second premixed mass of helium, the second premixed mass of the two helium gas cylinders is the same in the embodiment), the third premixed mass of oxygen gas (each of the pre-mixed gas cylinders can correspond to the third premixed mass of one oxygen, the specifications of the pre-mixed gas cylinders 107 and 108 are the same, the third gas cylinders of the two oxygen are also the same in the embodiment), the electromagnetic valves 114, 117 and 118 and the pneumatic valves 121 and 122 are closed, and the pneumatic valves 122 are stopped when the mass of the pre-mixed gas cylinders 107 and 108 is the air, and the air is the pre-mixed gas is the air-mixed, and the air is the air mixed valve is the air-mixed, if the air is the air and the air is the air mixed and the air is the air and the air. After the mixed gas is prepared, cylinder valves on the premixed gas cylinders 107, 108 are closed, electromagnetic valves 117, 118 and 125 are opened, and redundant gases in the helium pneumatic pump 105, the oxygen pneumatic pump 106 and the pipeline in the gas distribution system are released, so that the gas distribution system can be ensured to be continuously and safely used.
During the process of preparing the helium-oxygen mixed gas, the pipelines of the nitrogen source bottle 101 and the nitrogen pneumatic pump 104 are not used, and the solenoid valves 113, 116 and 119 are always in a closed state.
After the premixed gas cylinders 107 and 108 complete initial gas distribution, the concentration detection method of the embodiment is adopted to detect the concentration of oxygen in the premixed gas cylinders, and when the premixed gas cylinders with the concentration of oxygen not meeting the gas distribution requirement exist, the gas supplementing method of the embodiment is adopted to supplement gas.
The working processes of oxygen concentration detection and gas supplement of the gas distribution system of the premixed gas cylinder of the embodiment can be as follows:
the oxygen concentration analyzer 129 is used for respectively detecting the concentration of oxygen in the mixed gas of the premixed gas cylinders 107 and 108, the electromagnetic valves 122 and 126 and the pneumatic valve 127 are opened, the oxygen concentration analyzer 129 is used for detecting the concentration of oxygen in the premixed gas cylinder 107, the electromagnetic valves 122 and 126 and the pneumatic valve 127 are closed, the electromagnetic valves 123 and 126 and the pneumatic valve 128 are opened, the oxygen concentration analyzer 129 is used for detecting the concentration of oxygen in the premixed gas cylinder 108, and the electromagnetic valves 123 and 126 and the pneumatic valve 128 are closed, so that the oxygen concentrations of the premixed gas cylinders 107 and 108 are respectively obtainedIf the oxygen concentration->Oxygen concentration meeting the requirement->The allowable error range of the gas mixture ratio in the corresponding premixed gas cylinder is qualified, and gas does not need to be supplemented to the premixed gas cylinder at the moment; otherwise, it is necessary to weigh the mass of premix cylinders 107 and 108 with weighing devices 109 and 110, respectively +. >The mass of oxygen required to be supplemented into the premixed cylinders 107 and 108 is calculated by a computer +.>Or supplementing helium gas>. For example, the oxygen concentration in premix cylinder 107 +.>Oxygen concentration in premix cylinder 108 which does not meet the distribution requirements>According with the air distribution requirement, the premixed air cylinder 107 needs to be supplemented with the mass +.>The supplemental process may be:
opening electromagnetic valves 115 and 121 to enable oxygen in the oxygen source bottle 103 to enter the oxygen pneumatic pump 106 through a pipeline, providing driving gas for the oxygen pneumatic pump 106 by using the driving air pump 112 so as to boost the oxygen, boosting the oxygen to be more than or equal to 2.5 MPa, opening electromagnetic valves 118 and 122 and a pneumatic valve 127, filling the boosted oxygen into the premixed gas bottle 107, and when the weighing device 109 weighs the mass of the premixed gas bottle 107 to be the mass of the premixed gas bottle 107Mass ∈2 with supplemental oxygen>When the sum is carried out, the electromagnetic valves 118 and 122 and the pneumatic valve 127 are closed, and the oxygen is stopped from being filled into the premixed gas cylinder 106, so that the mixed gas meeting the oxygen concentration ratio requirement is obtained; closing the cylinder valve on premix cylinder 107, opening solenoid valves 118 and 125, releasing excess gas from the oxygen pneumatic pump 106 and piping in the supplemental system to ensure that the distribution system can hold And (5) detecting and supplementing the gas concentration, so as to ensure the purity of supplementing the gas to other premixed gas cylinders.
Example 2:
taking 1 bottle of 15MPa and 40L of nitrogen helium oxygen mixed gas (60% of nitrogen, 15% of helium and 25% of oxygen) as an example at normal temperature, calculating the first premixing mass of nitrogen, the second premixing mass of helium and the third premixing mass of oxygen in the mixed gas by a computer, wherein the specific calculation process is as follows:
pure nitrogen (not less than 99.99%) is used, and the mass of nitrogen in the mixed gasIs->
Helium mass in the mixed gas is used by pure helium (not less than 99.99 percent)Is that
Using the mass of oxygen in a mixture of medical oxygen (not less than 99.5%)Is that
Total mass of mixed gasIs that
After obtaining the nitrogen mass, the helium mass and the oxygen mass to be filled into the premixed gas cylinders 107 and 108 (each premixed gas cylinder needs to be filled with the nitrogen, the helium and the oxygen with the above mass), opening the electromagnetic valves 122, 123 and 124 and the pneumatic valves 127 and 128, vacuumizing the premixed gas cylinders 107 and 108 by using the vacuum pump 111, and closing the electromagnetic valves 122, 123 and 124 and the pneumatic valves 127 and 128 when the premixed gas cylinders 107 and 108 meet the requirement of the vacuum degree, namely the pressure of the premixed gas cylinders 107 and 108 is reduced to-0.05 MPa to-0.07 MPa; when the pre-mixed gas cylinders 107 and 108 are filled with nitrogen, the electromagnetic valves 113 and 119 are opened, the nitrogen in the nitrogen source gas cylinder 101 enters the nitrogen gas pneumatic pump 104 through a pipeline, the driving gas pump 112 is utilized to supply driving gas for the nitrogen gas pneumatic pump 104 so as to boost the pressure of the nitrogen gas, the nitrogen gas is boosted to be more than or equal to 2.5 MPa, the electromagnetic valves 116, 122 and 123 and the pneumatic valves 127 and 128 are opened, the pressurized nitrogen gas is filled into the pre-mixed gas cylinders 107 and 108, when the weighing devices 109 and 110 weigh the mass of the pre-mixed gas cylinders 107 and 108 to be the sum of the mass of the pre-mixed gas cylinders 207 and 208 after vacuumizing and the first pre-mixed mass of the nitrogen gas (each pre-mixed gas cylinder can correspond to the first pre-mixed mass of one nitrogen gas cylinder, in the embodiment, the specifications of the pre-mixed gas cylinders 107 and 108 are the same, and the first pre-mixed mass of the two nitrogen gases are the same), the electromagnetic valves 116, 122 and 123 and the pneumatic valves 127 and 128 are closed, and the electromagnetic valves 122 and 127 are closed if the pre-mixed gas cylinder 107 reaches the sum of the mass of the first pre-mixed gas cylinders and the pneumatic valves 127 are closed; when the pre-mixed gas cylinders 107 and 108 are filled with helium, electromagnetic valves 114 and 120 are opened, the helium in the helium gas source cylinder 102 enters the helium gas pneumatic pump 105 through a pipeline, a driving gas pump 112 is utilized to supply driving gas for the helium gas pneumatic pump 105 so as to boost the helium gas, the helium gas is boosted to be more than or equal to 2.5 MPa, electromagnetic valves 117, 122 and 123 and pneumatic valves 127 and 128 are opened, the boosted helium gas is filled into the pre-mixed gas cylinders 107 and 108, when weighing devices 109 and 110 weigh the mass of the pre-mixed gas cylinders 107 and 108 after vacuumizing, the first pre-mixed mass of nitrogen and the second pre-mixed mass of helium (each pre-mixed gas cylinder can correspond to the second pre-mixed mass of one helium gas), when the specifications of the pre-mixed gas cylinders 107 and 108 are the same and the second pre-mixed mass of two helium gases are the same, electromagnetic valves 117, 122 and 123 and pneumatic valves 127 and 128 are closed, when the pre-mixed gas cylinders 107 and 108 reach the sum, the electromagnetic valves 122 and pneumatic valves 127 and 108 are closed when the sum of the pre-mixed gas cylinders 107 reaches the sum; when the premixed gas cylinders 107, 108 are filled with oxygen, the electromagnetic valves 115 and 121 are opened, so that the oxygen in the oxygen source gas cylinder 103 enters the oxygen gas pump 106 through the pipeline, the driving gas pump 112 is used for providing driving gas for the oxygen gas pump 106 so as to boost the oxygen to be more than or equal to 2.5 MPa, the electromagnetic valves 118, 122, 123 and the pneumatic valves 127, 128 are opened, the pressurized oxygen is filled into the premixed gas cylinders 107, 108, when the weighing devices 109, 110 weigh the mass of the premixed gas cylinders 107, 108 to be the mass of the premixed gas cylinders 107, 108 after vacuumizing, the first premixed mass of nitrogen (each premixed gas cylinder can correspond to the first premixed mass of one nitrogen, in the embodiment, the specifications of the premixed gas cylinders 107 and 108 are the same, the first premixed mass of two nitrogen gases is the same) and the second premixed mass of helium gas (each premixed cylinder may correspond to the second premixed mass of one helium gas, in this embodiment, the specifications of the premixed cylinders 107 and 108 are the same, the second premixed mass of two helium gases is the same), and the third premixed mass of oxygen gas (each premixed cylinder may correspond to the third premixed mass of one oxygen gas, in this embodiment, the specifications of the premixed cylinders 107 and 108 are the same, and the third premixed mass of two oxygen gases is the same), the charging of oxygen gas into the premixed cylinders 107 and 108 is stopped, if the premixed cylinder 107 reaches the sum of the masses, the solenoid valve 122 and the pneumatic valve 127 are closed first, and similarly, if the premixed cylinder 108 reaches the sum of the masses first, the solenoid valve 123 and the pneumatic valve 128 are closed first until the nitrogen-helium-oxygen mixed gas meeting the concentration ratio requirement is obtained. After the mixed gas is prepared, cylinder valves on the premixed gas cylinders 107 and 108 are closed, electromagnetic valves 116, 117, 118 and 125 are opened, and redundant gases in the nitrogen pneumatic pump 104, the helium pneumatic pump 105, the oxygen pneumatic pump 106 and pipelines in the gas distribution system are released, so that the gas distribution system can be used continuously and safely.
After the premixed gas cylinders 107 and 108 complete initial gas distribution, the concentration detection method of the embodiment is adopted to detect the concentration of oxygen in the premixed gas cylinders, and when the premixed gas cylinders with the concentration of oxygen not meeting the gas distribution requirement exist, the gas supplementing method of the embodiment is adopted to supplement gas.
The working processes of oxygen concentration detection and gas supplement of the gas distribution system of the premixed gas cylinder of the embodiment can be as follows:
the oxygen concentration analyzer 129 is adopted to respectively detect the concentration of oxygen in the mixed gas of the premixed gas cylinders 107 and 108, the electromagnetic valves 122 and 126 and the pneumatic valve 127 are opened, the oxygen concentration analyzer 129 is adopted to detect the concentration of oxygen in the premixed gas cylinder 107, the electromagnetic valves 122 and 126 and the pneumatic valve 127 are closed, the electromagnetic valves 123 and 126 and the pneumatic valve 128 are opened, the oxygen concentration analyzer 129 is adopted to detect the concentration of oxygen in the premixed gas cylinder 108, and the electromagnetic valves 123 and 126 and the pneumatic valve 128 are closed to respectively obtain the oxygen concentrations of the premixed gas cylinders 107 and 108If the oxygen concentration->Oxygen concentration meeting the requirement->The allowable error range of the gas mixture ratio in the corresponding premixed gas cylinder is qualified, and gas does not need to be supplemented to the premixed gas cylinder at the moment; otherwise, it is necessary to weigh the mass of premix cylinders 107 and 108 with weighing devices 109 and 110, respectively +. >The mass of oxygen required to be supplemented into the premixed cylinders 107 and 108 is calculated by a computer +.>Or the mass of helium supplement->. For example, the oxygen concentration in premix cylinder 107 +.>Oxygen concentration in premix cylinder 108 in accordance with the gas distribution requirements>The air distribution requirement is not met, and the mass is required to be supplemented into the premixed air cylinder 108 through the weighing of the weighing device 110 and the calculation of a computer>The supplemental process may be:
opening electromagnetic valves 114 and 120 to enable helium in the helium source bottle 102 to enter the helium pneumatic pump 105 through a pipeline, providing driving gas for the helium pneumatic pump 105 by using the driving air pump 112 so as to boost the helium, boosting the helium to be more than or equal to 2.5 MPa, opening electromagnetic valves 117 and 123 and a pneumatic valve 128, filling the boosted helium into the premix bottle 108, and weighing the mass of the premix bottle 108 by the weighing device 110 to be equal to the mass of the premix bottle 108Mass ∈9 with helium supplementation>When the gas flows out, the electromagnetic valves 117 and 123 and the pneumatic valve 128 are closed, and the helium gas is stopped from being filled into the premixed gas cylinder 108, so that mixed gas meeting the oxygen concentration ratio requirement is obtained; closing the cylinder valve on the premix cylinder 108, opening the electromagnetic valves 117 and 125, and releasing the helium pneumatic pump 105 and the redundant gas in the pipeline in the supplementing system, so as to ensure that the gas distribution system can continuously detect and supplement the gas concentration, and ensure the purity of supplementing the gas to other premix cylinders.
In the present embodiment, the solenoid valves 113, 114, 115, 116, 117, 118, 124, 125, 126 are high-pressure solenoid valves, and the solenoid valves 119, 120, 121, 122, 123 are low-pressure solenoid valves; the solenoid valves 122, 123 are used in conjunction with the drive air pump 112 to control the drive air pump 112 to supply drive air to the pneumatic valves 127 and 128.
The gas concentration detection and supplement function of the gas distribution system of the embodiment mixes the charged gasesThe oxygen concentration in the premixed cylinders 107 and 108 of the gas is detected, respectively, when the oxygen concentration isNot requiring oxygen concentration->When the allowable error of (1) is within the allowable error range, the mass of the premixed cylinders 107 and 108 is measured by the corresponding weighing devices 109 and 110 respectively, and the oxygen concentration is detected according to the measured oxygen concentration +.>And mass calculation of premix cylinders 107 and 108 the mass of oxygen needs to be supplemented to premix cylinders 107 and 108 +.>Or supplementing helium gas>The premixed cylinders 107 and 108 are replenished with oxygen or helium of a corresponding mass. After the premixed gas cylinder 107 or 108 is subjected to the supplementary gas, the oxygen concentration analyzer 129 can be used for detecting the oxygen concentration again, so that after the supplementary gas is ensured, the mixed gas of the corresponding premixed gas cylinder meets the gas distribution requirement.
The air supply function of the air supply system of the embodiment completes the supplement of corresponding air in the premixed air cylinders according to the mass ratio by calculating the mass of oxygen or helium which needs to be supplemented into the premixed air cylinders 107 and 108, so that the air supply process is not influenced by environmental factors such as pressure, temperature and the like, and the air supply precision of mixed air in the premixed air cylinders of the deep-diving breathing apparatus is ensured.
In the gas distribution system, after initial gas distribution of the premixed gas cylinder or oxygen or helium with corresponding mass is completed, the control equipment can control the shaking device to shake the premixed gas cylinder uniformly, so that the gases in the gas distribution system can be fully mixed, and the detection result of the oxygen concentration is more accurate.
Fig. 2 shows an inflation system according to the present embodiment, which is used to inflate a mixed gas in a premixed gas cylinder 201 with acceptable oxygen concentration detection into a deep-diving breathing apparatus gas cylinder.
The inflation system comprises a gas mixing and pressurizing device, wherein the gas mixing and pressurizing device is used for filling the mixed gas in the premixed gas cylinder into the deep-diving breathing apparatus gas cylinder in a fourth pressure range, and the deep-diving breathing apparatus gas cylinder is arranged in the inflation protecting box 206, wherein the fourth pressure range is larger than or equal to 2.5MPa.
The deep diving breathing apparatus gas cylinder is a high pressure gas cylinder, and in the inflation process, if the deep diving breathing apparatus gas cylinder leaks or bursts accidentally, the inflation protective box can play a protective role for operators. The inflatable protective box adopts the design of the roll-over door, is convenient to use, is safe and reliable, and is firm and durable. The inflation system of this embodiment can inflate simultaneously a plurality of deep diving breathing apparatus gas cylinders, and the protection case 206 of aerifing of this embodiment can be inflated simultaneously four 1.3L deep diving breathing apparatus gas cylinders, is equipped with pressure monitoring and to pressing audible and visual alarm in the protection case 206 of aerifing, and when the inflation pressure reached the settlement pressure flash buzzer warning, red pilot lamp scintillation prompts operating personnel to maintain the protection case 206 of aerifing.
The inflation system of the present embodiment further includes: an oxygenation air source bottle 202, an oxygenation pressurization device; the oxygenation pressurization device is used for pressurizing the oxygen to a fifth pressure range and filling the deep-diving breathing apparatus gas cylinder. The oxygen supply bottle 202 and the oxygen charging pressurizing device form an oxygen charging pipeline, and the function of independently charging oxygen of the charging system is added. The fifth pressure range is greater than or equal to 2.5MPa.
The air mixing and pressurizing device of the embodiment comprises an air mixing pneumatic pump 203 and an air mixing driving air pump 205, wherein the air mixing pneumatic pump 203 is used for pressurizing mixed gas to be filled into a deep submerged respirator gas cylinder, and the air mixing driving air pump 205 is used for providing a driving air source for the air mixing pneumatic pump 203. The oxygenation pressurization device of the present embodiment includes an oxygenation air pump 204 and a gas mixing driving air pump 205, the oxygenation air pump 204 is used for pressurizing oxygen to be filled into a deep-diving breathing apparatus gas cylinder, and the gas mixing driving air pump 205 is used for providing a driving air source for the oxygenation air pump 204. The air mixing pneumatic pump 203 and the oxygenation pneumatic pump 204 are pneumatic booster pumps, have no electric arc and spark, are suitable for being applied to flammable and explosive places, have stable output pressure, generate small pulse and have higher safety when pressurizing oxygen.
The process of filling the mixed gas into the respirator gas cylinder by using the inflation system of the embodiment can be as follows: the electromagnetic valves 207 and 211 are opened, so that the mixed gas in the premixed gas cylinder 201 enters the mixed gas pneumatic pump 203 through a pipeline, the driving gas pump 205 is utilized to provide driving gas for the mixed gas pneumatic pump 203 so as to boost the mixed gas, the mixed gas is boosted to be more than or equal to 2.5 MPa, the electromagnetic valve 213 is opened, and the boosted mixed gas is filled into the deep-diving breathing apparatus gas cylinder.
The process of filling oxygen into the respirator gas cylinder using the inflation system of the present embodiment may be: the electromagnetic valves 208 and 212 are opened, so that oxygen in the oxygenation gas source bottle 202 enters the oxygenation pneumatic pump 204 through a pipeline, the driving gas pump 205 is used for providing driving gas for the oxygenation pneumatic pump 204 so as to pressurize the oxygen, the oxygen is pressurized to be more than or equal to 2.5 MPa, the electromagnetic valve 213 is opened, and the pressurized oxygen is filled into the deep-diving breathing apparatus bottle.
In the present embodiment, the solenoid valves 207, 208, 209, 210, 213 are high-pressure solenoid valves, and the solenoid valves 211, 212 are low-pressure solenoid valves.
Finally, it is to be understood that the above embodiments are merely exemplary embodiments employed for the purpose of illustrating the principles of the present invention, however, the present invention is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the principles and spirit of the invention, and such modifications and improvements are also considered within the scope of the invention.

Claims (18)

1. A gas filling system for a deep-diving breathing apparatus gas cylinder, comprising: the air distribution system, the air charging system, the premixed air cylinder and the deep diving breathing apparatus air cylinder;
the gas distribution system comprises: the device comprises a nitrogen gas source bottle, an oxygen gas source bottle, a helium gas source bottle, a nitrogen pressurizing device, an oxygen pressurizing device, a helium pressurizing device and a vacuum pump;
the vacuum pump is used for vacuumizing the premixed gas cylinder; the nitrogen pressurizing device is used for charging nitrogen with a first premixing mass into the premixing gas cylinder in a first pressure range; the helium supercharging device is used for charging helium with a second premixing mass into the premixing gas cylinder in a second pressure range; the oxygen pressurizing device is used for charging the oxygen with a third premixing quality into the premixing gas cylinder in a third pressure range;
the inflation system comprises a gas mixing pressurization device;
and the mixed gas pressurizing device is used for charging the mixed gas in the premixed gas cylinder into the deep-diving breathing apparatus gas cylinder in a fourth pressure range.
2. The inflation gas system of a deep-latency respirator gas cylinder of claim 1, wherein the oxygen pressurization device comprises an oxygen pneumatic pump for pressurizing oxygen to be inflated into the pre-mixed gas cylinder and a drive gas pump for providing a drive gas source for the oxygen pneumatic pump.
3. The gas charging system of a deep-diving breathing apparatus gas cylinder of claim 1, wherein said nitrogen pressurization device and said helium pressurization device each comprise an electric solid lubrication booster pump for boosting nitrogen and helium gas to be charged into said premixed gas cylinder, respectively.
4. The gas charging system of a deep submersible respirator gas cylinder according to claim 1, further comprising a weighing device for weighing the mass of the pre-mixed gas cylinder in real time.
5. The gas-filled distribution system for a deep-latency respirator gas cylinder of claim 4, further comprising a computer for calculating a second premixed mass of helium and a third premixed mass of oxygen when the distribution system is dispensing a helium-oxygen mixture for a deep-latency respirator.
6. The gas charging system of a deep-diving breathing apparatus gas cylinder of claim 5, further comprising a control device for controlling the helium pressurization device to pressurize the helium gas to a second pressure range and then charge the premixed gas cylinder, wherein the control device is configured to control stopping charging the premixed gas cylinder with helium gas when the weight device weighs the premixed gas cylinder for a sum of a mass of the premixed gas cylinder after evacuation and a second premixed mass of the helium gas.
7. The gas charging system of the deep-diving breathing apparatus gas cylinder according to claim 6, wherein the control device is further configured to control the oxygen pressurizing device to pressurize the oxygen to a third pressure range and then charge the premixed gas cylinder, and the control device is configured to control stopping charging the premixed gas cylinder with oxygen when the weight of the premixed gas cylinder is the sum of the mass of the premixed gas cylinder after the weight of the premixed gas cylinder is vacuumized, the second premixed mass of helium, and the third premixed mass of oxygen.
8. The gas-filled distribution system of deep-submerged respirator gas cylinders of claim 4, further comprising a computer for calculating a first premixed mass of nitrogen, a second premixed mass of helium, and a third premixed mass of oxygen when the gas-distribution system is dispensing the nitrogen helium-oxygen mixture of the deep-submerged respirator.
9. The gas charging and distribution system for the deep-diving breathing apparatus gas cylinder according to claim 8, further comprising a control device for controlling the nitrogen pressurizing device to pressurize the nitrogen to a first pressure range and then charge the premixed gas cylinder, wherein when the weight device weighs the premixed gas cylinder to be the sum of the mass of the premixed gas cylinder after vacuumizing and the first premixed mass of the nitrogen, the control device is used for controlling to stop charging the premixed gas cylinder with the nitrogen.
10. The gas charging system of a deep-diving breathing apparatus gas cylinder of claim 9, wherein the control device is further configured to control the helium pressurization device to charge the premixed gas cylinder after pressurizing helium gas to a second pressure range, and wherein the control device is configured to control stopping charging helium gas into the premixed gas cylinder when the weight device weighs the premixed gas cylinder for a sum of a mass of the premixed gas cylinder after evacuation, a first premixed mass of nitrogen gas, and a second premixed mass of helium gas.
11. The gas charging system of a deep-diving breathing apparatus gas cylinder of claim 10, wherein the control device is further configured to control the oxygen pressurizing device to pressurize the oxygen to a third pressure range and then charge the premixed gas cylinder, and wherein the control device is configured to control stopping charging the premixed gas cylinder with oxygen when the weight device weighs the premixed gas cylinder for a sum of the mass of the premixed gas cylinder after the vacuum is drawn, the first premixed mass of nitrogen, the second premixed mass of helium, and the third premixed mass of oxygen.
12. The gas charging system of a deep-submerged respirator gas cylinder according to claim 6 or 9, further comprising an oxygen concentration analyzer for detecting the oxygen concentration of the gas mixture in the pre-mixed gas cylinder that is formulated ；
When the oxygen concentration isNot requiring oxygen concentration->When the allowable error range of (2) is within the allowable error range, the total mass of the premix cylinder is weighed by the weighing device at the moment>If the measured oxygen concentration +.>Less than the required oxygen concentration->Calculating the mass of oxygen required to be supplemented to the premixed gas cylinder by the computer according to the following formula>And supplementing the premix cylinder with a mass of +.>Oxygen of (2);
if the measured oxygen concentration isGreater than the required oxygen concentration->Calculating by the computer the mass +_ of helium needed to supplement the premix cylinder as follows>And supplementing the premix cylinder with a mass of +.>Is a helium gas of (2);
in the above-mentioned description of the invention,the mass of the premixed gas cylinder after vacuumizing and before filling the mixed gas.
13. The inflation gas system of a deep submerged respirator gas cylinder of claim 12, wherein the weighing device weighs the premixed gas cylinder when replenishing the premixed gas cylinder with oxygen to a mass ofWhen the premixed gas cylinder is in a closed state, the control equipment is also used for controlling stopping filling oxygen into the premixed gas cylinder;
when helium is supplemented into the premixed gas cylinder, the weighing device weighs the premixed gas cylinder to have the mass of And when the premixed gas cylinder is in a closed state, the control equipment is also used for controlling the stopping of filling helium into the premixed gas cylinder.
14. The gas charging system of a deep submersible respirator gas cylinder according to claim 1, further comprising a shaking device for shaking the mixed gas charged into the premixed gas cylinder.
15. The inflation gas system of a deep-latency respirator gas cylinder of claim 1, the inflation system further comprising: an oxygenation air source bottle, an oxygenation supercharging device; the oxygenation pressurization device is used for pressurizing oxygen to a fifth pressure range and filling the deep-diving breathing apparatus gas cylinder.
16. The inflation gas system of a deep-latency respirator gas cylinder of claim 15, wherein the oxygenation pressurization device comprises an oxygenation pneumatic pump for pressurizing oxygen to be inflated into the deep-latency respirator gas cylinder and a gas-mixing drive gas pump for providing a drive gas source for the oxygenation pneumatic pump.
17. The inflation gas system of the deep-diving breathing apparatus gas cylinder of claim 1, wherein the gas mixing pressurization device comprises a gas mixing pneumatic pump for pressurizing a mixed gas to be inflated into the deep-diving breathing apparatus gas cylinder and a gas mixing driving air pump for providing a driving gas source for the gas mixing pneumatic pump.
18. The inflation gas system of a deep-latency respirator gas cylinder of claim 1, further comprising an inflation protection box in which the deep-latency respirator gas cylinder is disposed.
CN202311707308.5A 2023-12-13 2023-12-13 Gas filling and distributing system of deep diving respirator gas cylinder Active CN117404595B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311707308.5A CN117404595B (en) 2023-12-13 2023-12-13 Gas filling and distributing system of deep diving respirator gas cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311707308.5A CN117404595B (en) 2023-12-13 2023-12-13 Gas filling and distributing system of deep diving respirator gas cylinder

Publications (2)

Publication Number Publication Date
CN117404595A true CN117404595A (en) 2024-01-16
CN117404595B CN117404595B (en) 2024-04-09

Family

ID=89489318

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311707308.5A Active CN117404595B (en) 2023-12-13 2023-12-13 Gas filling and distributing system of deep diving respirator gas cylinder

Country Status (1)

Country Link
CN (1) CN117404595B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11333280A (en) * 1998-05-29 1999-12-07 Daido Hoxan Inc Process and device for flowing type feeder for desired concentration mixed gas formed of two kinds of gases
EP2236202A1 (en) * 2009-04-02 2010-10-06 Tauchtechnik Schmitt GmbH Method for operating a device for filling a submersible bottle
CN204816244U (en) * 2015-06-11 2015-12-02 中国船舶重工集团公司第七一八研究所 Weigh device of many bottles of standard gas mixtures of cofabrication on line
CN108894772A (en) * 2018-09-14 2018-11-27 中国石油大学(华东) A kind of high-temperature and high-pressure visual pit shaft gas-liquid flow morphotype draft experiment device and method
CN212900918U (en) * 2020-08-06 2021-04-06 沈阳洪生气体有限公司 Multi-component gas mixture filling system
CN114740141A (en) * 2022-04-27 2022-07-12 西安交通大学 Experimental measurement system and method for hydrogen supercritical water thermal combustion characteristics

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11333280A (en) * 1998-05-29 1999-12-07 Daido Hoxan Inc Process and device for flowing type feeder for desired concentration mixed gas formed of two kinds of gases
EP2236202A1 (en) * 2009-04-02 2010-10-06 Tauchtechnik Schmitt GmbH Method for operating a device for filling a submersible bottle
CN204816244U (en) * 2015-06-11 2015-12-02 中国船舶重工集团公司第七一八研究所 Weigh device of many bottles of standard gas mixtures of cofabrication on line
CN108894772A (en) * 2018-09-14 2018-11-27 中国石油大学(华东) A kind of high-temperature and high-pressure visual pit shaft gas-liquid flow morphotype draft experiment device and method
CN212900918U (en) * 2020-08-06 2021-04-06 沈阳洪生气体有限公司 Multi-component gas mixture filling system
CN114740141A (en) * 2022-04-27 2022-07-12 西安交通大学 Experimental measurement system and method for hydrogen supercritical water thermal combustion characteristics

Also Published As

Publication number Publication date
CN117404595B (en) 2024-04-09

Similar Documents

Publication Publication Date Title
US4860803A (en) Continuous nitrox mixer
US20180003684A1 (en) Determining the partial pressure of a gas, calibrating a pressure sensor
US20210309329A1 (en) Determining the partial pressure of a gas in a pressure vessel
CN109229308A (en) From taking the double air supply system enclosed circulation aqualungs not depressurized
BRPI1008490A2 (en) breathing apparatus
CA3114155C (en) Individual closed-circuit rebreather for underwater diving
CN117404595B (en) Gas filling and distributing system of deep diving respirator gas cylinder
GB1086761A (en) Breathing apparatus
JPS62500492A (en) Variable continuous injection digital pressure gauge
CN117386995B (en) Mixed gas distribution system of deep submerged respirator premixed gas cylinder
US20130297233A1 (en) Apparatus and Method for Comparing Gas Pressure Measurements
CN117387000B (en) Gas concentration detection and supplement system for premixed gas cylinder of deep diving breathing apparatus
CN117386994B (en) Mixed gas distribution method of premixed gas cylinder of deep diving breathing apparatus
CN117387001B (en) Gas filling and distribution control system and control method for deep diving breathing apparatus gas cylinder
CN206841688U (en) Decompression chamber, ship and submersible
EP0274868A1 (en) Measuring apparatus
CN106762526B (en) Gas pumping and exhausting device and using method thereof
GB2201602A (en) Closed circuit breathing/diving apparatus
US20150153003A1 (en) Nitric oxide cylinder filling apparatus and method
US9038628B2 (en) System and method for an oxygen system alarm
RU2330779C2 (en) Semi-closed-type breathing apparatus
CN213948733U (en) Waterproof diving respirator
KR100755453B1 (en) Control system for diving
Ktos et al. The Environmental Control Of The Hyperbaric Facilities
CN112169206A (en) Positive pressure type air respirator with buffering effect

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant