CN119123298A - A mixed gas filling system and method - Google Patents
A mixed gas filling system and method Download PDFInfo
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- CN119123298A CN119123298A CN202411545472.5A CN202411545472A CN119123298A CN 119123298 A CN119123298 A CN 119123298A CN 202411545472 A CN202411545472 A CN 202411545472A CN 119123298 A CN119123298 A CN 119123298A
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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
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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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/031—Air
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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
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0135—Pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to the technical field of gas filling, in particular to a mixed gas filling system and a mixed gas filling method. The mixed gas filling system provided by the invention can reasonably utilize the gas in the gas source cylinders, and specifically comprises at least two gas source cylinders, a filled gas cylinder and at least two groups of pressure multiplication devices, wherein each gas source cylinder is connected with the filled gas cylinder through one group of pressure multiplication devices, and the pressure multiplication devices are used for pressurizing the component gas with fixed volume from the gas source cylinder by a preset multiple in a hydraulic mode and filling the pressurized high-pressure gas into the filled gas cylinder.
Description
Technical Field
The invention relates to the technical field of gas filling, in particular to a mixed gas filling system and a mixed gas filling method.
Background
The filling of the mixed gas is usually carried out by directly connecting a gas source cylinder containing component gas with a filled gas cylinder and filling the mixed gas in a pressure equalizing mode. Along with the gradual decrease of the pressure of the air source air bottle, the pressure in the filled air bottle gradually rises, when the pressure of the filled air bottle is close to the pressure of the air source air bottle, the filled air bottle cannot be continuously pressurized for filling, and the part of air with lower pressure in the air source air bottle is difficult to be continuously utilized.
Disclosure of Invention
The invention provides a mixed gas filling system and a mixed gas filling method, which can reasonably utilize gas in a gas source gas cylinder.
In one embodiment, the invention provides a mixed gas filling system, which comprises at least two gas source cylinders, a filled gas cylinder and at least two groups of pressure multiplication devices, wherein each gas source cylinder is connected with the filled gas cylinder through one group of pressure multiplication devices, and the pressure multiplication devices are used for pressurizing a fixed volume of component gas from the gas source cylinders by a preset multiple in a hydraulic mode and filling the pressurized high-pressure gas into the filled gas cylinder.
Preferably, the pressure multiplication device comprises a pressure multiplier and a liquid storage tank, the pressure multiplier is respectively connected with the gas source gas cylinder and the liquid storage tank, the liquid storage tank is used for storing liquid, a high-pressure end of the pressure multiplier is used for containing component gas with a fixed volume in the gas source gas cylinder, a low-pressure end of the pressure multiplier is used for containing liquid from the liquid storage tank, and the pressure multiplier is used for pressurizing the component gas with the high-pressure end by a preset multiple by using the liquid with the low-pressure end.
Preferably, the pressure multiplication device further comprises a valve group and a pump group, a high-pressure end piston, a piston rod and a low-pressure end piston which are sequentially connected are arranged in the pressure multiplier, the diameter of the high-pressure end piston is smaller than that of the low-pressure end piston, an intermediate cavity is formed between the high-pressure end piston and the low-pressure end piston, one side of the intermediate cavity is far away from the high-pressure end piston, a high-pressure cavity for containing component gas is formed on one side of the intermediate cavity, a low-pressure cavity is formed on one side of the low-pressure end piston, the intermediate cavity is connected with the valve group through a first pipeline, the low-pressure cavity is connected with the valve group through a second pipeline, the valve group is connected with the liquid storage tank through a liquid supply pipeline and a liquid return pipeline respectively, and the pump group is arranged on the liquid supply pipeline and is used for controlling the flow direction of liquid in the first pipeline and the second pipeline.
Preferably, the gas source cylinder is connected with the high-pressure cavity through a third pipeline, a pressure reducing device and a first one-way valve are arranged on the third pipeline, and the pressure reducing device is used for reducing the pressure of the gas source cylinder to a preset pressure so that the component gas with a fixed volume is stored in the high-pressure cavity before filling.
Preferably, the high-pressure cavity is connected with the filled gas cylinder through a fourth pipeline, a first pressure detection device and a second one-way valve are arranged on the fourth pipeline, the first pressure detection device is used for detecting the real-time pressure of the filled gas cylinder in the gas filling process, a second pressure detection device is arranged on the liquid supply pipeline, and the second pressure detection device is used for detecting the real-time total pressure of the low-pressure cavity in the gas filling process.
Preferably, the device further comprises a vacuum pump connected with the fourth pipeline for vacuumizing the third pipeline, the fourth pipeline, the filled gas cylinder and the high-pressure cavity before the first gas filling.
Preferably, the outlet of the vacuum pump, the outlet of the air source air cylinder and the inlet of the filled air cylinder are all provided with valves, and the liquid return pipeline is provided with a heat exchanger and an air filter.
Preferably, the working pressure of the second one-way valve is 10-100 times of the working pressure of the first one-way valve.
Preferably, the gas filling is accomplished by controlling the real-time total pressure of the low pressure chamber to meet the following target formula:
Pl≥Rg·Pg·A2÷A1
Wherein, P l is the real-time total pressure of the low-pressure cavity, R g is the preset air pressure boost ratio, the air pressure boost ratio is the ratio of the fixed volume and the volume of the compressed component gas in the high-pressure cavity, P g is the preset pressure, a 2 is the area of the high-pressure end piston, and a 1 is the area of the low-pressure end piston.
In another embodiment, the present invention provides a method for filling a mixed gas, which is based on the mixed gas filling system described in the above embodiment, and the method includes:
before gas filling, component gas of the gas source gas cylinder is decompressed to the preset pressure by the decompression device and then is filled into the high-pressure cavity, and the volume of the high-pressure cavity is the fixed volume;
And when the gas filling is carried out, controlling the real-time total pressure of the low-pressure cavity to meet the target formula so as to enable the component gas in the high-pressure cavity to be filled into the filled gas cylinder.
The beneficial effects are that:
According to the mixed gas filling system and method, the pressure multiplication device is arranged between the gas source cylinder and the filled gas cylinder, so that the pressure multiplication device can be used for pressurizing the component gas with a fixed volume in the gas source cylinder by a preset multiple in a hydraulic mode, and the pressurized high-pressure gas is filled into the filled gas cylinder, and the problem caused by filling the mixed gas cylinder with the gas source cylinder can be solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic configuration of a mixed gas filling system according to an embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", "middle", and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
As shown in fig. 1, the present invention provides a mixed gas filling system, which comprises at least two gas source cylinders 1, a filled gas cylinder 2 and at least two groups of pressure multiplication devices 3, wherein each gas source cylinder 1 is connected with the filled gas cylinder 2 through one group of pressure multiplication devices 3, and the pressure multiplication devices 3 are used for pressurizing a fixed volume of component gas from the gas source cylinder 1 by a preset multiple in a hydraulic manner and filling the pressurized high-pressure gas into the filled gas cylinder 2.
The pressure multiplication means 3 are based on pascal's law, according to which a certain pressure is exerted on one piston in the hydraulic system, the resulting force will be transferred to the same by the piston rod, and if the area of one end of the piston rod is half the area of the other end of the piston, the pressure acting on the other end will be increased to 2 times the original piston.
For systems with gas, how to borrow the pressure multiplication device 3 is a considerable problem because of the compressibility of the gas. In consideration of economy, the pressure multiplier is used for completing the filling of the mixed gas cylinder, the problems in the aspects of flow, equipment, method and the like are solved, and a system for filling the mixed gas, which is economical and safe, needs to be provided.
In the present embodiment, by providing the pressure doubling device 3 between the gas source cylinder 1 and the filled cylinder 2, the component gas from the fixed volume in the gas source cylinder 1 can be pressurized by a preset multiple in a hydraulic manner by using the pressure doubling device 3, and the pressurized high-pressure gas is filled into the filled cylinder 2, so that the problem caused by filling the mixed gas cylinder with the gas source cylinder can be solved.
In one embodiment, the pressure multiplying device 3 comprises a pressure multiplier 31 and a liquid storage tank 32, the pressure multiplier 31 is connected with the gas source cylinder 1 and the liquid storage tank 32 respectively, the liquid storage tank 32 is used for storing liquid, the high-pressure end of the pressure multiplier 31 is used for containing component gas from a fixed volume in the gas source cylinder 1, the low-pressure end is used for containing liquid from the liquid storage tank 32, and the pressure multiplier 31 is used for pressurizing the component gas at the high-pressure end by a preset multiple by using the liquid at the low-pressure end.
The liquid may be water, hydraulic oil or other liquid medium, and is not limited herein.
In one embodiment, the pressure multiplication device 3 further comprises a valve group 33 and a pump group 34, a high-pressure end piston, a piston rod and a low-pressure end piston which are sequentially connected are arranged in the pressure multiplier 31, the diameter of the high-pressure end piston is smaller than that of the low-pressure end piston, an intermediate cavity is formed between the high-pressure end piston and the low-pressure end piston, a high-pressure cavity for containing component gas is formed on one side, away from the intermediate cavity, of the high-pressure end piston, a low-pressure cavity is formed on one side, away from the intermediate cavity, of the low-pressure end piston, the intermediate cavity is connected with the valve group 33 through a first pipeline 41, the low-pressure cavity is connected with the valve group 33 through a second pipeline 42, the valve group 33 is connected with the liquid storage tank 32 through a liquid supply pipeline 45 and a liquid return pipeline 46, the pump group 34 is arranged on the liquid supply pipeline 45, and the valve group 33 is used for controlling the flow direction of liquid in the first pipeline 41 and the second pipeline 42.
When the two pistons and the cylinder body outside the two pistons move, three parts of cavities, namely an upper cavity (namely a high-pressure cavity), a middle cavity (namely a middle cavity) and a lower cavity (namely a low-pressure cavity), are formed, and the pipelines connected to the three cavities are matched with corresponding valves (namely a valve group), so that not only can the entering and the discharging of different cavity liquids be realized, but also the movement of the pistons can be realized, the reciprocating movement can be realized, and the component gases to be pressurized can be continuously pressurized.
In one embodiment, the gas source cylinder 1 is connected to the high pressure cavity through a third pipeline 43, and a pressure reducing device 51 and a first one-way valve 52 are disposed on the third pipeline 43, where the pressure reducing device 51 is used to reduce the pressure of the gas source cylinder 1 to a preset pressure, so that a fixed volume of component gas is stored in the high pressure cavity before filling.
In this embodiment, by providing the pressure reducing device 51, it is ensured that the component gas with a fixed volume is stored in the high-pressure chamber before each filling, and at the same time, the air entering caused by too low pressure of the air source gas cylinder 1 can be avoided.
In one embodiment, the high-pressure cavity is connected with the filled gas cylinder 2 through a fourth pipeline 44, a first pressure detecting device 61 and a second one-way valve 62 are arranged on the fourth pipeline 44, the first pressure detecting device 61 is used for detecting the real-time pressure of the filled gas cylinder 2 in the gas filling process, a second pressure detecting device 63 is arranged on the liquid supply pipeline 45, and the second pressure detecting device 63 is used for detecting the real-time total pressure of the low-pressure cavity in the gas filling process.
When the piston at the high pressure end of the pressure multiplier moves to the top to move downwards, the liquid from the valve group in the middle cavity enables the piston to move downwards, the piston needs to move downwards, the high pressure cavity sucks component gas from the gas source gas cylinder, and the liquid in the low pressure cavity returns to the liquid storage tank through the valve group and the liquid return pipeline.
In one embodiment, the vacuum pump 64 is further included, and the vacuum pump 64 is connected to the fourth pipeline 44 and is used for vacuumizing the third pipeline 43, the fourth pipeline 44, the filled gas cylinder 2 and the high-pressure cavity before the first gas filling, so that impurity gas can be prevented from being mixed in during the gas filling process.
When the ratio of the mixed gas cylinder is required, the gas of the gas cylinder of one component gas source is used for filling the filled gas cylinder after the vacuumizing process is finished, and the gas of the other component is used for filling the filled gas cylinder after the gas is filled to the corresponding pressure required by the components. If the volume of the gas cylinder is V, the highest working pressure of the gas cylinder is P, the gas quantity which can be filled in the gas cylinder under the P pressure is n=PV/(RT), if the mixed gas is two permanent gases, the total of the n 1 and the n 2(n1/n and the n 2/n is not more than 1, under the condition that the volume of the gas cylinder is fixed, the filling pressure Pi=n iR·T/V,Pi of n i is less than or equal to P, if the component i is 1, P 1＝n1.R.T/V, and the pressure P 2＝(n1+n2)·R·T/V＝P1+n2.R.T/V when the second component is filled after the first component is filled, the value is also the pressure control indication value of the pressure gauge before the gas cylinder is filled.
In one embodiment, the outlet of the vacuum pump 64, the outlet of the gas supply cylinder 1 and the inlet of the filled cylinder 2 are provided with valves 65, and the return line 46 is provided with a heat exchanger 66 and an air filter 67. The heat exchanger 66 is provided to recover heat generated from the liquid and cool the liquid, and the air filter 67 is provided to remove air from the liquid, considering that the liquid generates heat during pressurization.
In one embodiment, the operating pressure of the second check valve 62 is 10-100 times the operating pressure of the first check valve 52. For example, the operating pressure of second check valve 62 may be 15MPa and the operating pressure of first check valve 52 may be 0.5MPa.
In one embodiment, gas filling is accomplished by controlling the real-time total pressure of the low pressure chamber to meet the following target formula:
Pl≥Rg·Pg·A2÷A1
Wherein P l is the real-time total pressure of the low-pressure cavity, R g is the preset air pressure boosting ratio, the air pressure boosting ratio is the ratio of the fixed volume to the volume of the compressed component gas in the high-pressure cavity, P g is the preset pressure, A 2 is the area of the high-pressure end piston, and A 1 is the area of the low-pressure end piston.
In order to boost the component gases filled in the gas cylinder, two pistons are arranged in the pressure multiplier, the diameter or area of the upper piston is smaller than that of the lower piston (shown in figure 1) for the pressure multiplier with the boosting function, and the hydraulic boosting ratio R l determined by the area ratio of the two pistons and the liquid P l1·A1＝Pl2·A2,Pl1/Pl2＝A2/A1 can realize the boosting of liquid due to the balance of the forces at the two ends of the pistons. However, for a pressure multiplier with a gas at one end, if the high pressure end is the gas end, if the volume of the gas suction end is nV ', the volume after compression is V ', the pressure of the gas after isothermal adiabatic gas compression is n times of the initial pressure, that is, the barometric pressure ratio is R g, wherein the end volume can be close to no gap, the pressure of the high pressure cylinder can reach very high pressure, the component gas pressure P g1 (that is, P g) from the gas source cylinder enters the high pressure end through the one-way valve and then is compressed to P g2 (that is, R g·Pg), and at the time of P l1·A1≥Pg2·A2 (that is, P l≥Rg·Pg·A2÷A1), the gas is discharged from the high pressure end to the pressurized cylinder under the set pressure of the outlet one-way valve.
For example, a plurality of gas source cylinders with the internal pressure of about 5MPa and the volume of 40 liters are used for inflating a 40 liter inflated gas cylinder with the highest working pressure of 15MPa, the diameter of a low-pressure end piston of a pressure multiplier is 200mm, the diameter of a high-pressure end piston is 100mm, the highest working pressure which can be provided by a pump group and a valve group is 15MPa, the hydraulic pushing force is 1.885x 3 N, the component gas at the high-pressure end enters the high-pressure end of the pressure multiplier through a decompression device to have the gas pressure of 0.5MPa, the end part of the high-pressure end piston is positioned in a high-pressure cavity with the length of 300mm, the volume of the high-pressure end is 2.355 liters, when the end part of the high-pressure end piston moves to a distance of 3mm from the end part of the cylinder, the corresponding volume is 0.02355 liters, and under isothermal adiabatic compression, the corresponding pressure is 50MPa when the second one-way valve 62 is not opened, and the pressure is completely suitable for inflating the inflated gas cylinder.
After the vacuum pump is used for vacuumizing the filled gas cylinder and the related pipelines, the pressure multiplier connected with the gas cylinders with different gas sources is used for pressurizing corresponding gas to fill the filled gas cylinder, after each time of the pressure multiplier action, the first pressure detection device 61 at the front end of the filled gas cylinder determines whether the pressure multiplier continues to work, and if the pressure is lower than the set pressure, the pressure multiplier continues to work until the pressure detected by the first pressure detection device 61 at the front end of the filled gas cylinder reaches the set pressure.
In addition, the embodiment of the invention also provides a method for filling the mixed gas, which is based on the mixed gas filling system mentioned in the embodiment, and comprises the following steps:
before filling the gas, the component gas of the gas source gas cylinder 1 is decompressed to a preset pressure by the decompression device 51 and then is filled into the high-pressure cavity, and the volume of the high-pressure cavity is a fixed volume at the moment;
When gas filling is performed, the real-time total pressure of the low-pressure chamber is controlled to satisfy a target formula so that the component gas in the high-pressure chamber is filled into the filled gas cylinder 2.
It can be understood that the method for filling the mixed gas provided in this embodiment and the system for filling the mixed gas provided in the foregoing embodiments are based on the same inventive concept, so that the two have the same advantages, and are not described in detail herein.
It is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (10)
1. The mixed gas filling system is characterized by comprising at least two gas source cylinders, a filled gas cylinder and at least two groups of pressure multiplication devices, wherein each gas source cylinder is connected with the filled gas cylinder through one group of pressure multiplication devices, and the pressure multiplication devices are used for pressurizing component gas with fixed volume from the gas source cylinders by a preset multiple in a hydraulic mode and filling the pressurized high-pressure gas into the filled gas cylinder.
2. The mixed gas filling system according to claim 1, wherein the pressure multiplication device comprises a pressure multiplier and a liquid storage tank, the pressure multiplier is respectively connected with the gas source cylinder and the liquid storage tank, the liquid storage tank is used for storing liquid, a high-pressure end of the pressure multiplier is used for containing component gas from a fixed volume in the gas source cylinder, a low-pressure end is used for containing liquid from the liquid storage tank, and the pressure multiplier is used for pressurizing the component gas at the high-pressure end by a preset multiple by using the liquid at the low-pressure end.
3. The mixed gas filling system according to claim 2, wherein the pressure multiplication device further comprises a valve group and a pump group, a high-pressure end piston, a piston rod and a low-pressure end piston which are sequentially connected are arranged in the pressure multiplier, the diameter of the high-pressure end piston is smaller than that of the low-pressure end piston, an intermediate cavity is formed between the high-pressure end piston and the low-pressure end piston, a high-pressure cavity for containing component gas is formed on one side, away from the intermediate cavity, of the high-pressure end piston, a low-pressure cavity is formed on one side, away from the intermediate cavity, of the low-pressure end piston, the intermediate cavity is connected with the valve group through a first pipeline, the low-pressure cavity is connected with the valve group through a second pipeline, the valve group is connected with the liquid storage tank through a liquid supply pipeline and a liquid return pipeline respectively, and the pump group is arranged on the liquid supply pipeline, and the valve group is used for controlling the flow directions of liquid in the first pipeline and the second pipeline.
4. A mixed gas filling system according to claim 3, wherein the gas source cylinder is connected to the high pressure chamber through a third pipeline, a pressure reducing device and a first one-way valve are arranged on the third pipeline, and the pressure reducing device is used for reducing the pressure of the gas source cylinder to a preset pressure so that a fixed volume of component gas is stored in the high pressure chamber before filling.
5. The mixed gas filling system according to claim 4, wherein the high-pressure cavity is connected with the filled gas cylinder through a fourth pipeline, a first pressure detection device and a second one-way valve are arranged on the fourth pipeline, the first pressure detection device is used for detecting the real-time pressure of the filled gas cylinder in the gas filling process, a second pressure detection device is arranged on the liquid supply pipeline, and the second pressure detection device is used for detecting the real-time total pressure of the low-pressure cavity in the gas filling process.
6. The mixed gas filling system according to claim 5, further comprising a vacuum pump connected to the fourth line for evacuating the third line, the fourth line, the filled gas cylinder and the high pressure chamber prior to the first gas filling.
7. The mixed gas filling system according to claim 6, wherein valves are provided at the outlet of the vacuum pump, the outlet of the gas source cylinder and the inlet of the filled cylinder, and the liquid return line is provided with a heat exchanger and an air cleaner.
8. The mixed gas filling system according to claim 5, wherein the working pressure of the second check valve is 10 to 100 times the working pressure of the first check valve.
9. The mixed gas filling system according to any one of claims 5 to 8, wherein gas filling is accomplished by controlling the real-time total pressure of the low pressure chamber to satisfy the following target formula:
Pl≥Rg·Pg·A2÷A1
Wherein, P l is the real-time total pressure of the low-pressure cavity, R g is the preset air pressure boost ratio, the air pressure boost ratio is the ratio of the fixed volume and the volume of the compressed component gas in the high-pressure cavity, P g is the preset pressure, a 2 is the area of the high-pressure end piston, and a 1 is the area of the low-pressure end piston.
10. A method of filling a mixed gas, characterized in that it is based on the mixed gas filling system according to claim 9, said method comprising:
Before gas filling, component gas of the gas source gas cylinder is decompressed to the preset pressure by the decompression device and then is filled into the high-pressure cavity, and the volume of the high-pressure cavity is the fixed volume;
And when the gas filling is carried out, controlling the real-time total pressure of the low-pressure cavity to meet the target formula so as to enable the component gas in the high-pressure cavity to be filled into the filled gas cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411545472.5A CN119123298A (en) | 2024-11-01 | 2024-11-01 | A mixed gas filling system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202411545472.5A CN119123298A (en) | 2024-11-01 | 2024-11-01 | A mixed gas filling system and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988001021A1 (en) * | 1986-07-31 | 1988-02-11 | Thomas Welch Hotchkiss | Single and double acting fluid intensifier pump |
| CN204783521U (en) * | 2015-06-07 | 2015-11-18 | 成都一通密封有限公司 | Liquid drive supercharging device |
| CN110057431A (en) * | 2018-01-19 | 2019-07-26 | 辽宁美托科技股份有限公司 | A kind of the mixed gas device for filling and method of band overturning platform |
| CN117386995A (en) * | 2023-12-13 | 2024-01-12 | 抚顺抚运安仪救生装备有限公司 | Mixed gas distribution system of deep submerged respirator premixed gas cylinder |
| CN118462669A (en) * | 2024-05-06 | 2024-08-09 | 东北石油大学三亚海洋油气研究院 | A hydraulically controlled two-stage piston booster device |
-
2024
- 2024-11-01 CN CN202411545472.5A patent/CN119123298A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988001021A1 (en) * | 1986-07-31 | 1988-02-11 | Thomas Welch Hotchkiss | Single and double acting fluid intensifier pump |
| CN204783521U (en) * | 2015-06-07 | 2015-11-18 | 成都一通密封有限公司 | Liquid drive supercharging device |
| CN110057431A (en) * | 2018-01-19 | 2019-07-26 | 辽宁美托科技股份有限公司 | A kind of the mixed gas device for filling and method of band overturning platform |
| CN117386995A (en) * | 2023-12-13 | 2024-01-12 | 抚顺抚运安仪救生装备有限公司 | Mixed gas distribution system of deep submerged respirator premixed gas cylinder |
| CN118462669A (en) * | 2024-05-06 | 2024-08-09 | 东北石油大学三亚海洋油气研究院 | A hydraulically controlled two-stage piston booster device |
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