CN111729166A - Low-temperature oxygen storage and supply system and oxygen supply method based on same - Google Patents

Low-temperature oxygen storage and supply system and oxygen supply method based on same Download PDF

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Publication number
CN111729166A
CN111729166A CN202010633158.8A CN202010633158A CN111729166A CN 111729166 A CN111729166 A CN 111729166A CN 202010633158 A CN202010633158 A CN 202010633158A CN 111729166 A CN111729166 A CN 111729166A
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China
Prior art keywords
oxygen
storage tank
liquid
valve
air outlet
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CN202010633158.8A
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Chinese (zh)
Inventor
应建明
郑育仁
谈辉
陈宇翔
张芷毓
唐金福
张迎春
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HANGZHOU FUSHIDA SPECIAL MATERIAL CO Ltd
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HANGZHOU FUSHIDA SPECIAL MATERIAL CO Ltd
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Priority to CN202010633158.8A priority Critical patent/CN111729166A/en
Publication of CN111729166A publication Critical patent/CN111729166A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/1095—Preparation of respiratory gases or vapours by influencing the temperature in the connecting tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • 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
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0391—Thermal insulations by vacuum
    • 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
    • F17C2250/03—Control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F17C2250/0434—Pressure difference

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Emergency Medicine (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention relates to a low-temperature oxygen storage and supply system and an oxygen supply method based on the low-temperature oxygen storage and supply system, wherein the oxygen supply system comprises a liquid injection device, a liquid oxygen heat insulation storage tank, an emptying valve device, a pressure reducing valve device and a control device; the bottom of the liquid oxygen heat insulation storage tank is provided with a liquid inlet pipe, the top of the liquid oxygen heat insulation storage tank is provided with an air outlet pipe and a capillary pipe, and the liquid injection device is connected with the liquid inlet pipe of the liquid oxygen heat insulation storage tank; the emptying valve device is communicated with an air outlet pipe of the liquid oxygen heat insulation storage tank; the pressure reducing valve device is provided with two air inlet ends and an air outlet end, the emptying valve device is communicated with one air inlet end of the pressure reducing valve device through an air conveying pipeline, and the capillary tube is communicated with the other air inlet end of the pressure reducing valve device through a gasification pipeline; the control device is provided with a nasal suction pipe joint, and the pressure reducing valve device is communicated with the nasal suction pipe joint through the control device. The invention increases the utilization rate of oxygen, increases the oxygen supply time, avoids overlarge air pressure in the liquid oxygen heat insulation storage tank, is convenient to empty and has short operation time and good heat insulation performance.

Description

Low-temperature oxygen storage and supply system and oxygen supply method based on same
Technical Field
The invention relates to the technical field of low-temperature oxygen storage and supply, in particular to a low-temperature oxygen storage and supply system and an oxygen supply method based on the low-temperature oxygen storage and supply system.
Background
At present, medical, plateau or other oxygen needs are mainly needed, continuous oxygen output is obtained through products such as ward equipment belts, oxygen generators, high-pressure oxygen bottles, portable oxygen tanks and the like, and because oxygen is continuously output when a human body exhales, great waste is caused. When considering outdoor oxygen consumption, equipment such as a high-pressure oxygen cylinder, an oxygen generator and the like is not suitable due to factors such as large volume, heaviness and the like, at present, a portable oxygen tank is mostly adopted, oxygen is stored in a high-pressure gaseous state, and the oxygen can be only absorbed for about 1 hour due to small capacity, so that the outdoor construction or travel requirement for a long time cannot be met. When liquid oxygen is converted into gaseous oxygen, the volume of the liquid oxygen can reach 860 times of the original volume, and compared with a gaseous storage mode, the same container can realize oxygen storage with larger capacity.
At present, a conventional oxygen supply device is disclosed in patent No. CN209470020U, and includes a liquid oxygen tank mechanism, a vaporizer mechanism, and a pressure reducing valve mechanism, wherein the pressure reducing valve mechanism is communicated with the liquid oxygen tank mechanism through the vaporizer mechanism, the oxygen supply device outputs liquid oxygen through a liquid outlet pipe of the liquid oxygen tank mechanism, and the liquid oxygen is gasified in the vaporizer mechanism and then used.
The above-described conventional oxygen supply device has the following drawbacks: firstly, the traditional liquid oxygen tank mechanism has poor heat insulation effect, partial liquid oxygen in the liquid oxygen tank mechanism is gasified in the liquid oxygen tank mechanism, the oxygen is gathered at the top of the liquid oxygen tank mechanism, the traditional oxygen supply mode is that the liquid oxygen is output through a liquid outlet pipe of the liquid oxygen tank mechanism, the liquid oxygen is gasified in a vaporizer mechanism and then used, the oxygen in the liquid oxygen tank mechanism cannot be output and used, the continuously gasified oxygen causes the increase of the air pressure in the liquid oxygen tank mechanism, and the oxygen is required to be released through a safety valve to maintain the balance of the air pressure in the liquid oxygen tank mechanism, so that the waste of the oxygen is caused; secondly, after the liquid oxygen in the liquid oxygen tank mechanism is used up, the liquid oxygen in the liquid oxygen tank mechanism needs to be emptied through an emptying valve, so that the liquid oxygen used next time can be filled in the liquid oxygen tank mechanism, and the traditional emptying valve needs to screw a valve rod to open an emptying port when air is emptied, so that the opening and closing operation time is long, the operation is complicated, the labor intensity is high, and the operation efficiency is low; thirdly, when the oxygen supply device is used, when the pipeline for conveying oxygen is blocked and the like, the air pressure in the system is increased, and potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a low-temperature oxygen storage and supply system and an oxygen supply method based on the low-temperature oxygen storage and supply system, aiming at the problems that oxygen is wasted in an oxygen supply device, a liquid oxygen tank is complex to operate when being emptied, and the oxygen supply system has potential safety hazards.
The invention relates to a low-temperature oxygen storage and supply system which comprises a liquid injection device, a liquid oxygen heat insulation storage tank, an emptying valve device, a pressure reducing valve device and a control device, wherein the liquid oxygen heat insulation storage tank is arranged in the liquid oxygen heat insulation storage tank; the bottom of the liquid oxygen heat insulation storage tank is provided with a liquid inlet pipe, the top of the liquid oxygen heat insulation storage tank is provided with an air outlet pipe and a capillary pipe, and the liquid injection device is connected with the liquid inlet pipe of the liquid oxygen heat insulation storage tank; the air inlet end of the emptying valve device is communicated with an air outlet pipe of the liquid oxygen heat insulation storage tank; the pressure reducing valve device is provided with two air inlet ends and one air outlet end, the air outlet end of the emptying valve device is communicated with one air inlet end of the pressure reducing valve device through an air conveying pipeline, and the capillary tube is communicated with the other air inlet end of the pressure reducing valve device through a gasification pipeline; the control device is provided with a nasal suction pipe joint, and the air outlet end of the pressure reducing valve device is communicated with the nasal suction pipe joint through the control device.
Preferably, the liquid oxygen heat insulation storage tank comprises a storage tank shell and a storage tank inner container, the gas outlet pipe is fixed at the top end of the storage tank inner container, the liquid inlet pipe is fixed at the bottom of the storage tank inner container, the storage tank shell is sleeved outside the storage tank inner container, a vacuum cavity is formed between the storage tank shell and the storage tank inner container, the liquid inlet pipe and the gas outlet pipe both penetrate through the storage tank shell, and the outer walls of the liquid inlet pipe and the gas outlet pipe are both fixed with the storage tank shell; the capillary tube is arranged in the air outlet tube, the bottom end of the capillary tube extends to the position, close to the bottom, of the inner cavity of the storage tank liner, the bottom end of the air outlet tube is located at the position, close to the top, of the inner cavity of the storage tank liner, the top end of the capillary tube penetrates out of the air outlet tube, and the outer diameter of the capillary tube is smaller than the inner diameter of the air.
Preferably, the outer wall of the inner container of the storage tank is coated with a heat insulation material layer; a vacuumizing port is welded at the top end of the storage tank shell, and one end of the vacuumizing port is communicated with the vacuum cavity; the vacuum cavity is internally provided with a molecular sieve which is fixed on the outer wall of the inner container of the storage tank or the inner wall of the outer shell of the storage tank.
Preferably, the liquid injection device comprises a buckle joint, a ferrule joint and a liquid inlet valve rod, wherein a liquid inlet is arranged at the lower end of the ferrule joint, the upper end of the ferrule joint is in threaded connection with the lower end of the buckle joint, a liquid inlet pipe is connected with the upper end of the buckle joint through a locking nut, a liquid oxygen channel communicated with the liquid inlet pipe is arranged in the buckle joint and the ferrule joint, a first fixing seat is arranged at the lower end of the buckle joint, the outer ring of the first fixing seat is fixed with the inner wall of the ferrule joint, a through hole is formed in the center of the first fixing seat, a plurality of notches are formed in the circumferential direction of the first fixing seat, a gap is formed between the notch part of the fixing seat and the ferrule joint, the size of the liquid inlet valve rod is smaller than the aperture of the through hole, a convex ring and a first sealing gasket used for sealing the, the lower end of the first spring is in contact with the upper surface of the convex ring, and the upper end of the first spring is in contact with the lower surface of the first fixed seat; the lower end of the buckle joint is also provided with a buckle part which is used for connecting the liquid oxygen supplementing tank when supplementing liquid oxygen, the buckle part is fixed with the buckle joint through a locking screw, and a first clamping groove is formed in the buckle part; a first sealing ring is arranged at the junction of the buckle joint and the ferrule joint; and a second sealing ring is arranged at the junction of the buckle joint and the buckle piece.
Preferably, the emptying valve device comprises an emptying valve body and an emptying mechanism; the air release valve body is internally provided with an air inlet channel, an air outlet channel, an air release mechanism mounting hole and an air release channel, the air inlet channel is communicated with the air inlet end of the air release valve device, the air outlet channel is communicated with the air outlet end of the air release valve device, the air outlet channel and the air release mechanism mounting hole are both communicated with the air inlet channel, and the air release channel is communicated with the air release mechanism mounting hole; the emptying mechanism comprises a first valve rod, a wrench, a second spring and a first valve core, the first valve rod is arranged in an emptying mechanism mounting hole, the outer end of the first valve rod extends out of an emptying valve body, the first valve core is arranged at the inner end of the first valve rod, the first valve core is matched with an inner side hole opening of the emptying mechanism mounting hole, the second spring is sleeved on the outer ring of the first valve rod, two ends of the second spring are respectively supported on the first valve core and the emptying valve body, the wrench is hinged with the part of the first valve rod extending out of the emptying valve body through a rotating shaft, a first contact surface and a second contact surface are arranged on the wrench, the vertical distance from the first contact surface to the rotating shaft is smaller than that from the second contact surface to the rotating shaft, and the first contact surface or the second contact surface is in contact with the outer wall of the emptying valve body; the valve body of the emptying valve is also provided with a first safety valve which is communicated with the air inlet channel.
Preferably, the pressure reducing valve device comprises a first valve body, a second valve body and a pressure reducing valve body; a first oxygen channel is arranged in the first valve body, one end of the first oxygen channel is connected with the air outlet end of the emptying valve through an oxygen conveying pipeline, and the other end of the first oxygen channel is communicated with the pressure reducing valve body; the inside second oxygen passageway, third oxygen passageway and relief pressure valve device air outlet channel of being equipped with of second valve body, the one end of second oxygen passageway is passed through liquid oxygen gasification pipeline and is connected with the capillary, the other end and the relief pressure valve device air outlet channel intercommunication of second oxygen passageway, the one end and the relief pressure valve body intercommunication of third oxygen passageway, the other end and relief pressure valve device air outlet channel intercommunication, relief pressure valve device air outlet channel is connected with the nasal suction tube coupling through oxygen therapy pipe and controlling means.
Preferably, relief pressure valve body include the second fixing base, the third spring, movable block and elasticity seal membrane, the bottom at relief pressure valve body is fixed to the second fixing base, the third spring is installed at relief pressure valve body with the movable block, the both ends of third spring respectively with second fixing base and movable block in close contact with, the lower surface and the movable block in close contact with of elasticity seal membrane, the pipeline mouth of first oxygen passageway and the pipeline mouth of third oxygen passageway are hugged closely to the upper surface of elasticity seal membrane when the closure state, the axle center of third oxygen passageway aligns with the center of elasticity seal membrane, the axle center skew elasticity seal membrane's of first oxygen passageway center.
Preferably, the pressure reducing valve device further comprises a second relief valve, the second relief valve being in communication with the first oxygen passage.
Preferably, the gas pipeline and the gasification pipeline are wound outside the liquid oxygen heat insulation storage tank.
The invention also relates to an oxygen supply method based on the low-temperature oxygen storage and supply system, which comprises the following steps:
s1, closing the control device, releasing residual oxygen in the liquid oxygen heat insulation storage tank through the emptying valve device, and then filling liquid oxygen into the liquid oxygen heat insulation storage tank through the liquid injection device;
s2, opening the control device, enabling gasified oxygen in the liquid oxygen heat insulation storage tank to enter an emptying valve device through an air outlet pipe, enabling the gasified oxygen to enter a pressure reducing valve device through an air transmission pipeline, enabling the liquid oxygen to enter a gasification pipeline through a capillary pipe, and enabling the gasified oxygen in the gasification pipeline to enter the pressure reducing valve device;
s3, the pressure reducing valve device reduces the pressure of the oxygen, and the oxygen after pressure reduction is supplied to the human body through the nasal suction tube connected to the nasal suction tube joint.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. the liquid oxygen heat insulation storage tank of the low-temperature oxygen storage and supply system is provided with the air outlet pipe and the capillary pipe, the capillary pipe is used for outputting liquid oxygen, the liquid oxygen is gasified and heated in the spiral pipeline and then is supplied to a human body, the air outlet pipe is used for outputting oxygen gasified in the liquid oxygen heat insulation storage tank, the temperature of the liquid oxygen is raised in the spiral pipeline, the liquid oxygen is reduced in the pressure reducing valve and then is supplied to the human body, therefore, the utilization rate of the oxygen can be improved, the oxygen supply time of the low-temperature oxygen storage and supply system can be prolonged, meanwhile, the gasified oxygen in the liquid oxygen heat insulation storage tank is output and used, the air pressure in the liquid oxygen heat insulation storage tank can be balanced, and the phenomenon.
2. The emptying valve device comprises an emptying valve body and an emptying mechanism, wherein the emptying mechanism comprises a first valve rod, a wrench and a second spring, a first valve core is arranged at the inner end of the first valve rod, the second spring is sleeved on the outer ring of the first valve rod, the wrench is hinged with the part of the first valve rod, which extends out of the emptying valve body, through a rotating shaft, and is provided with a first contact surface and a second contact surface, the vertical distance from the first contact surface to the rotating shaft is smaller than the vertical distance from the second contact surface to the rotating shaft, and the first contact surface or the second contact surface is in contact with the outer wall of the emptying valve body.
3. According to the invention, the first safety valve is arranged on the emptying valve device, the second safety valve is arranged on the pressure reducing valve device, and when the pressure in the low-temperature oxygen storage and supply system is higher than the pressure value set by the first safety valve or the second safety valve, the first safety valve or the second safety valve is automatically opened and releases gas, so that the serious safety problem is prevented.
4. The liquid oxygen heat insulation storage tank adopts the technology of vacuum treatment, molecular sieve and multilayer heat insulation screen, and ensures the excellent heat insulation performance of the liquid oxygen heat insulation storage tank.
Drawings
FIG. 1 is a front view of a cryogenic oxygen storage and supply system according to the present invention;
FIG. 2 is a side view of a cryogenic oxygen storage and supply system according to the present invention;
FIG. 3 is a cross-sectional view of the liquid oxygen insulated storage tank of the present invention;
FIG. 4 is a sectional view of the priming device of the present invention in its normal (closed) state;
FIG. 5 is a sectional view of the liquid filling device shown in FIG. 4 in an open state in another direction for filling liquid oxygen;
FIG. 6 is a cross-sectional view A-A of the injection device of FIG. 5;
FIG. 7 is a cross-sectional view of the vent valve of the present invention in a closed condition;
FIG. 8 is a cross-sectional view of the vent valve of the present invention in the vent state;
FIG. 9 is a cross-sectional view of a pressure relief valve assembly of the present invention;
FIG. 10 is a front view of the control device of the present invention;
FIG. 11 is a horizontal cross-sectional view of the control device of the present invention;
FIG. 12 is a schematic time scale diagram of inhalation and exhalation of the control device in the auto-adjusting flow mode;
FIG. 13 is a functional block diagram of a control circuit.
Illustration of the drawings: 1-liquid oxygen heat insulation storage tank, 101-storage tank shell, 102-storage tank liner, 103-liquid inlet pipe, 104-gas outlet pipe, 105-capillary pipe, 106-vacuum cavity, 107-heat insulation material layer, 108-molecular sieve, 109-vacuum pumping port, 2-liquid injection device, 201-snap joint, 202-snap joint, 203-liquid inlet valve rod, 204-liquid inlet, 205-liquid oxygen channel, 206-first fixing seat, 207-first sealing gasket, 208-first spring, 210-snap joint, 211-first clamping groove, 212-locking screw, 216-first sealing ring, 217-second sealing ring, 219-locking nut, 220-notch, 3-vent valve device, 301-vent valve body, 302-gas inlet channel, 303-an air outlet channel, 304-a mounting hole of a venting mechanism, 305-a venting channel, 307-a first valve rod, 308-a wrench, 309-a second spring, 310-a first valve core, 311-a rotating shaft, 312-a first contact surface, 313-a second contact surface, 315-a first safety valve, 4-a pressure reducing valve device, 401-a first valve body, 402-a second valve body, 403-a pressure reducing valve body, 404-a first oxygen channel, 405-a second oxygen channel, 406-a third oxygen channel, 407-an air outlet channel of the pressure reducing valve device, 408-a second fixed seat, 409-a third spring, 410-a movable block, 411-an elastic sealing film, 412-a second safety valve, 5-a control device, 501-an oxygen inlet pipe, 502-an oxygen output connector, 503-an electromagnetic valve, 504-a differential pressure sensor, 505-a band switch, 506-a control circuit, 507-a continuous output control valve block, 508-a cam, 509-a valve block pipeline, 510-a second valve rod, 511-a third sealing ring, 512-a fourth spring, 513-a cam bulge, 6-an air pipeline, 7-a gasification pipeline and 8-a nasal suction pipe joint.
Detailed Description
For further understanding of the present invention, the present invention will be described in detail with reference to examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.
Example one
Referring to the attached drawings 1 and 2, the low-temperature oxygen storage and supply system comprises a liquid injection device 2, a liquid oxygen heat insulation storage tank 1, a blow-down valve device 3, a pressure reducing valve device 4 and a control device 5.
Referring to fig. 1 to 3, the liquid oxygen heat insulation storage tank 1 includes a storage tank casing 101, a storage tank liner 102, a liquid inlet pipe 103, a gas outlet pipe 104, and a capillary 105. The gas outlet pipe 104 is welded at the top end of the storage tank liner 102, the liquid inlet pipe 103 is welded at the bottom of the storage tank liner 102, the storage tank shell 101 is sleeved at the outer side of the storage tank liner 102, a vacuum cavity 106 is formed between the storage tank shell 101 and the storage tank liner 102, the liquid inlet pipe 103 and the gas outlet pipe 104 both penetrate through the storage tank shell 101, the outer walls of the liquid inlet pipe 103 and the gas outlet pipe 104 are both welded with the storage tank shell 101, and therefore the storage tank shell 101 and the storage tank liner 102 are fixed; the bottom end of the outlet pipe 104 is located at a position close to the top of the inner cavity of the storage tank liner 102, the capillary tube 105 is arranged inside the outlet pipe 104, the bottom end of the capillary tube 105 extends to a position close to the bottom of the inner cavity of the storage tank liner 102, the top end of the capillary tube 105 penetrates out of the outlet pipe 104, the outer diameter of the capillary tube 105 is smaller than the inner diameter of the outlet pipe 104, and a gap exists between the outer wall of the capillary tube 105 and the inner wall.
The top end of the storage tank shell 101 is welded with a vacuumizing port 109, one end of the vacuumizing port 109 is communicated with the vacuum cavity 106, the vacuumizing port 109 is used for vacuumizing the cavity between the storage tank shell and the storage tank liner in the production process of the liquid oxygen heat insulation storage tank, and the vacuumizing port 109 is blocked after vacuumizing; in order to enhance the heat insulation performance of the liquid oxygen heat insulation storage tank, the outer wall of the storage tank inner container 102 is coated with a heat insulation material layer 107, and the heat insulation material layer 107 is made of multiple layers of reflecting screens and heat insulation paper; the vacuum cavity 106 is internally provided with a molecular sieve 108, the molecular sieve 108 is fixed on the outer wall of the storage tank liner 102 or on the inner wall of the storage tank shell 101, the molecular sieve 108 is arranged between the storage tank liner 102 and the heat insulating material layer 107 in the embodiment, the molecular sieve 108 is used for purifying gas, absorbing molecules, ensuring the vacuum degree of the vacuum cavity 106, further ensuring the heat insulation effect of the liquid oxygen heat insulation storage tank 1, and further achieving a better vacuum effect.
The capillary 105 and the air outlet pipe 104 are arranged in an S shape between the storage tank shell 101 and the storage tank liner 102, and the S-shaped capillary 105 and the air outlet pipe 104 are beneficial to avoiding weld cracks caused by material strain at low temperature, so that the vacuum degree is ensured.
Referring to the attached fig. 1 and 2, the liquid injection device 2 is connected with a liquid inlet pipe 103 of the liquid oxygen heat insulation storage tank 1. The structure of the liquid injection device 2 is shown in fig. 4-6, and comprises a snap joint 201, a ferrule joint 202 and a liquid inlet valve rod 203, wherein a liquid inlet 204 is arranged at the lower end of the ferrule joint 202, the upper end of the ferrule joint 202 is in threaded connection with the lower end of the snap joint 201, a first sealing ring 216 is arranged at the junction of the snap joint 201 and the ferrule joint 202, and the first sealing ring 216 is used for preventing liquid oxygen from leaking from a gap between the snap joint 201 and the ferrule joint 202 in the liquid oxygen filling process; a liquid oxygen channel 205 communicated with each other is arranged in the buckle connector 201 and the ferrule connector 202, a first fixed seat 206 is arranged at the lower end of the buckle connector 201, the outer ring of the first fixed seat 206 is fixed with the inner wall of the ferrule connector 202, a through hole is arranged in the center of the first fixed seat 206, a gap 220 is arranged in the circumferential direction of the first fixed seat 206, and a gap is formed between the gap part of the fixed seat and the ferrule connector 202; the size of feed liquor valve rod 203 be less than the aperture of through-hole, the lower extreme of feed liquor valve rod 203 is equipped with bulge loop and the first seal gasket 207 that is used for shutoff inlet 204 under the closed condition, and the outer lane cover of feed liquor valve rod 203 is equipped with first spring 208, and feed liquor valve rod 203 passes the through-hole, the lower extreme of first spring 208 and the upper surface contact of bulge loop, the upper end of first spring 208 and the lower surface contact of first fixing base 206. The lower extreme of buckle connects 201 is equipped with the buckle 210 that is used for connecting liquid oxygen when supplementing liquid oxygen and supplyes the jar, and buckle 210 passes through locking screw 212 and connects 201 fixedly with the buckle, is equipped with the first draw-in groove 211 of "7" style of calligraphy on the buckle 2010, is equipped with the lug with first draw-in groove 211 complex on the liquid oxygen supplyes the jar. In the process of filling oxygen, the liquid oxygen supplementing tank enables the bump on the liquid oxygen supplementing tank to be clamped in the first clamping groove 211 in a screwing mode, the liquid oxygen supplementing tank is temporarily fixed, and a filling opening of the liquid oxygen supplementing tank upwards jacks up the liquid inlet valve rod 203 to fill the liquid oxygen storage tank; a second sealing ring 217 is arranged at the junction of the buckle connector 201 and the buckle element 210, and the second sealing ring 217 is used for preventing liquid oxygen from leaking from a gap between the buckle connector 201 and the buckle element 210.
In order to conveniently install the liquid injection device, the liquid injection device of the liquid oxygen storage tank further comprises a mounting seat used for fixing the liquid injection device on the liquid oxygen storage tank, the mounting seat is fixed with the outer ring of the buckle joint through a fixing nut, and the mounting seat is welded on the outer side of the liquid oxygen storage tank.
Referring to the attached drawings 1 and 2, the air inlet end of the air release valve device 3 is communicated with the air outlet pipe of the liquid oxygen heat insulation storage tank 1, and referring to the attached drawings 7 and 8, the air release valve device 3 comprises an air release valve body 301 and an air release mechanism; an air inlet channel 302, an air outlet channel 303, an air release mechanism mounting hole 304 and an air release channel 305 are arranged in the air release valve body 201, the air inlet channel 302 is communicated with the air inlet end of the air release valve device 3, the air outlet channel 303 is communicated with the air outlet end of the air release valve device 3, and the air outlet channel 303 and the air release mechanism mounting hole 304 are both communicated with the air inlet channel 302; the venting mechanism includes a first valve stem 307, the first valve rod 307 is installed in the emptying mechanism installation hole 304, the outer end of the first valve rod 307 extends out of the emptying valve body 301, the inner end of the first valve rod 307 is provided with a first valve core 310, the first valve core 310 is matched with an inner side hole opening of the emptying mechanism installation hole 304, the second spring 309 is sleeved on the outer ring of the first valve rod 307, two ends of the second spring 309 are respectively supported on the first valve core 310 and the emptying valve body 301, the wrench 308 is hinged with the portion, extending out of the emptying valve body 301, of the first valve rod 307 through a rotating shaft 311, the wrench 308 is provided with a first contact surface 312 and a second contact surface 313, the vertical distance from the first contact surface 312 to the rotating shaft 311 is smaller than that from the second contact surface 313 to the rotating shaft, the first contact surface 312 is in contact with the outer wall of the emptying valve body in a closed state, and the second contact surface 313 is in contact with the outer wall of the emptying valve body in an emptying state. The valve body 301 of the emptying valve is also provided with a first safety valve 315, and the first safety valve 315 is communicated with the air inlet channel.
Referring to the attached drawings 1 and 2, the pressure reducing valve device 4 is provided with two air inlet ends and one air outlet end, the air outlet end of the vent valve device 3 is communicated with one air inlet end of the pressure reducing valve device 4 through an air conveying pipeline 6, a capillary tube 105 is communicated with the other air inlet end of the pressure reducing valve device 4 through a gasification pipeline 7, the air conveying pipeline 6 and the gasification pipeline 7 are wound outside the liquid oxygen heat insulation storage tank, and the winding mode is adopted to increase the lengths of the air conveying pipeline 6 and the gasification pipeline 7 in a limited space, particularly increase the length of the gasification pipeline 7, so that the liquid oxygen absorbs enough heat, gasifies the liquid oxygen and heats the liquid oxygen to a normal temperature state.
The detailed structure of the pressure reducing valve device 4 is shown in fig. 9, and the pressure reducing valve device includes a first valve body 401, a second valve body 402, and a pressure reducing valve body 403; a first oxygen channel 404 is arranged in the first valve body 401, one end of the first oxygen channel 404 is connected with the air outlet end of the blow-down valve device 301 through an air conveying pipeline 6, and the other end of the first oxygen channel 404 is communicated with the pressure reducing valve body 403; a second oxygen channel 405, a third oxygen channel 406 and a pressure reducing valve device air outlet channel 407 are arranged in the second valve body 402, one end of the second oxygen channel 405 is connected with the capillary tube 105 through the gasification pipeline 7, the other end of the second oxygen channel 405 is communicated with the pressure reducing valve device air outlet channel 407, one end of the third oxygen channel 406 is communicated with the pressure reducing valve body 403, and the other end of the third oxygen channel 406 is communicated with the pressure reducing valve device air outlet channel 407. The pressure reducing valve device 4 described above further includes a second relief valve 412, and the second relief valve 412 communicates with the first oxygen passage 404.
The pressure reducing valve body 403 comprises a second fixed seat 408, a third spring 409, a movable block 410 and an elastic sealing film 411, the second fixed seat 408 is fixed at the bottom end of the pressure reducing valve body 403, the third spring 409 and the movable block 410 are installed in the pressure reducing valve body 403, two ends of the third spring 409 are respectively in close contact with the second fixed seat 408 and the movable block 410, the lower surface of the elastic sealing film 411 is in close contact with the movable block 410, and the upper surface of the elastic sealing film 411 is tightly attached to a pipeline port of the first oxygen channel 404 and a pipeline port of the third oxygen channel 406 in a closed state.
Referring to fig. 1 and 2, the control device 5 is provided with a nasal suction tube connector 8, and a pressure reducing valve device air outlet passage 407 of the pressure reducing valve device 4 is communicated with the nasal suction tube connector 8 through the oxygen therapy tube and the control device 5. The control device is at least provided with an electromagnetic valve and a control circuit, and the electromagnetic valve is in communication connection with the control circuit.
The oxygen supply method based on the low-temperature oxygen storage and supply system comprises the following steps:
s1, closing the control device 5, releasing residual oxygen in the liquid oxygen heat insulation storage tank through the vent valve device, wherein the vent valve device 3 is in a normal state as shown in FIG. 7, the first contact surface 313 contacts with the vent valve body 301, the first valve rod 307 blocks the inner side opening of the vent mechanism mounting hole 304, the wrench 308 is rotated by 90 degrees to enable the second contact surface 313 to contact with the outer end of the vent valve body 301, because the vertical distance from the first contact surface 312 to the rotating shaft 311 is smaller than the vertical distance from the second contact surface 313 to the rotating shaft 311, the wrench 308 pulls the first valve rod 307 outwards while rotating, the valve core 310 cannot block the inner side opening of the vent mechanism mounting hole 304, oxygen in the storage tank is discharged from the vent mechanism mounting hole 304 and the vent channel 305 to achieve venting, and at this time, the structure of the vent valve device 3 is as shown in FIG. 8; then, the emptying device 3 is closed, and liquid oxygen is filled into the liquid oxygen heat insulation storage tank through the liquid injection device 2, as shown in fig. 4, in a normal state of the liquid injection device 2, the liquid oxygen channel 205 is closed, that is, the first sealing gasket 207 seals the liquid inlet 204, and the liquid oxygen in the liquid oxygen heat insulation storage tank 1 cannot leak outwards through the liquid injection device 2; referring to fig. 6, when liquid oxygen needs to be filled into the liquid oxygen heat insulation storage tank 1, the fastener 210 is screwed into the liquid oxygen supplementing tank, so that a liquid outlet of the liquid oxygen supplementing tank jacks up the liquid inlet valve rod 203, and meanwhile, the fastener is clamped in the first clamping groove 211 together with a projection on the liquid oxygen supplementing tank, at this time, the first sealing gasket 207 is separated from the liquid inlet 204, the liquid oxygen channel 205 is communicated, and the liquid oxygen enters the liquid oxygen storage tank through the liquid inlet 204, the liquid oxygen channel 205, a gap between the through hole and the liquid inlet valve rod 203, a gap circumferentially arranged on the first fixing seat 206, and the liquid conveying pipe 103; after the liquid oxygen storage tank is filled, the liquid filling device 2 is rotated reversely and taken down from the liquid oxygen replenishing tank, the liquid inlet valve rod 203 resets under the action of the first spring 208, and the first sealing gasket 207 blocks the liquid inlet 204 again.
S2, opening the control device 5, enabling gasified oxygen in the liquid oxygen heat insulation storage tank 1 to enter the emptying valve device 3 through the air outlet pipe 104, enabling the gasified oxygen to enter the pressure reducing valve device 4 through the air transmission pipeline 6, enabling the liquid oxygen to enter the gasification pipeline 7 through the capillary 105, and enabling the gasified oxygen in the gasification pipeline 7 to enter the pressure reducing valve device 4.
S3, referring to fig. 9, since the liquid oxygen inside the liquid oxygen heat-insulating storage tank 1 is gasified and heated when passing through the capillary 105 and the gasification pipe 7, and is transported to the second oxygen passage 405, the output liquid oxygen is obtained by continuously gasifying with the actual usage amount of oxygen, and therefore, there is no high pressure and no need for pressure reduction; when the liquid oxygen in the liquid oxygen heat insulation storage tank 1 is not output, after a certain period of storage, part of the liquid oxygen is gasified into gas oxygen, so that a high-pressure oxygen region is formed at the top of the liquid oxygen heat insulation storage tank 1, the part of the oxygen enters a first oxygen channel 404 of a pressure reducing valve device through a gas transmission pipeline 6, and the part of the oxygen is in high pressure and needs to be reduced in pressure; when the pressure is reduced, if the air pressure in the first oxygen passage 404 is smaller than the threshold value set by the safety valve 412, the oxygen presses the elastic sealing film 411 of the valve body 403 of the pressure reducing valve, the elastic sealing film 411 and the spring 409 which are originally tightly attached to the first oxygen passage 404 and the third oxygen passage 406 are subjected to high pressure, the movable block 410 gives way, fine gaps are formed between the elastic sealing film 411 and the first oxygen passage 404 as well as between the elastic sealing film 411 and the third oxygen passage 406, and the oxygen enters the third oxygen passage 406 through the gaps, because of the throttling action of the gap, pressure loss is caused, the pressure reduction effect is realized, and through the adjustment of the pressure reducing valve fixing seat, under the action of the spring 409, the pressure fluctuation of the oxygen entering the third oxygen passage 406 is balanced with the force of the spring 409, the oxygen is kept constant within a certain error range, and the decompressed oxygen is supplied to people for use through a third oxygen channel 406 and an air outlet channel 407 of the pressure reducing valve device; when the gas pressure in the first oxygen passage 404 is greater than the threshold set by the safety valve 412, the safety valve 412 automatically opens to release the gas in the first oxygen passage 404, thereby preventing the gas pressure from being too high and causing more serious consequences.
Example two
In order to improve the oxygen utilization rate of the cryogenic oxygen storage and supply system and increase the oxygen output duration, the present embodiment further improves the control device 5 of the cryogenic oxygen storage and supply system on the basis of the first embodiment, and the control device in the present embodiment is as shown in fig. 10 and fig. 11, and includes:
an oxygen inlet pipe 501 for communicating with an outlet passage of the pressure reducing valve device and providing oxygen;
an oxygen output connector 502 for connecting with a nasal suction tube and supplying oxygen to a human body;
the electromagnetic valve 503 is used for controlling the on-off of a pipeline between the oxygen inlet pipe 501 and the oxygen output connector 502, the electromagnetic valve 503 comprises an electromagnetic valve port A, an electromagnetic valve port B and an electromagnetic valve port C, the oxygen inlet pipe 501 is connected with the electromagnetic valve port A, the oxygen output connector 502 is connected with the electromagnetic valve port B, and the differential pressure sensor 504 is connected with the electromagnetic valve port C;
a differential pressure sensor 504, which is communicated with the oxygen output connector 502 and is used for sensing the expiration and inspiration of the human body;
the wave band switch 505 is used for setting an oxygen therapy mode and transmitting mode information to the control circuit 506, and the wave band switch 505 is provided with a knob and used for adjusting the wave band switch;
a control circuit 506, which is used for receiving the expiration and inspiration signals of the differential pressure sensor 504 and receiving the mode information set by the band switch 505, and opening the electromagnetic valve 503 to output oxygen when the human body inhales according to the mode set by the band switch 505 and the expiration and inspiration signals of the differential pressure sensor 4, and closing the electromagnetic valve 503 to stop outputting oxygen when the human body exhales;
the band switch 505 sets oxygen therapy modes including a fixed flow mode and an automatic flow adjustment mode, wherein the automatic flow adjustment mode induces the inspiration of the human body through the pressure difference sensor 504, the control circuit 506 calculates the inspiration time length according to the received inspiration signal and the inspiration and expiration time ratio in one breath of the human body, and the on-off state of the electromagnetic valve is changed alternately according to the inspiration time length; the constant flow rate mode is to sense the inhalation of the human body through the differential pressure sensor 504, and the control circuit 506 receives the inhalation signal and alternately changes the on-off state of the electromagnetic valve according to the set constant time of each inhalation.
The control device of the oxygen supply system further comprises a continuous output control valve block 507, the wave band switch is further provided with a cam 508, and a cam protrusion 513 is arranged on the cam 8; the continuous output control valve block 507 is provided with a valve block pipeline 509 and a second valve rod 510, two ends of the valve block pipeline 509 are respectively communicated with the oxygen inlet pipe 501 and the oxygen output connector 502, a reducing section is arranged in the valve block pipeline 509, the second valve rod 510 is arranged in the valve block pipeline 509, the outer ring of the second valve rod 510 is provided with a third sealing ring 511 used for plugging the valve block pipeline 509, the third sealing ring 511 is matched with the reducing section, one end of the second valve rod 510 is provided with a fourth spring 512, and the other end of the second valve rod is matched with the wave band switch 505.
The control device of the oxygen supply system is further provided with a continuous oxygen supply mode, and when the oxygen supply system is in an emergency state, for example, the oxygen demand of a human body is large or the communication connection between the band switch and the control circuit is failed, the second valve rod 510 can be opened mechanically by rotating the band switch 505, so that the oxygen supply system can continuously output oxygen.
The electromagnetic valve 503 adopts a copper series two-position three-way direct-acting piston plate type electromagnetic valve with the model number Z141/Z1432, and the differential pressure sensor 504 adopts a PX137 series pressure sensor;
the band switch can switch oxygen delivery state, can close the air supply, oxygen suppliment under the automatic adjustment flow mode, oxygen suppliment under the fixed flow mode or oxygen suppliment under the continuous oxygen suppliment mode, wherein the oxygen suppliment can divide into again under the fixed flow mode five gears in 0.3 seconds, 0.5 seconds, 0.8 seconds, 1.2 seconds, 1.5 seconds and 2.0 seconds, under closing air supply and continuous oxygen suppliment mode, the complete machine is not controlled by the controlling device, switches through mechanical system.
Referring to fig. 13, the control circuit 6 includes an MCU, a power module and a driving module, the band switch and the differential pressure sensor are both connected to the MCU, an amplifier is further disposed between the differential pressure sensor and the MCU for amplifying a differential pressure signal generated by inspiration, and the signal is transmitted to the MCU after being amplified; the power module comprises a battery box, a booster circuit and a low-dropout linear regulator (LDO) which are sequentially connected, the battery box is arranged in a battery socket and is a four-section LR14 battery, the battery box can be used for the complete machine to work for 10-16 hours in a fixed flow mode, the LDO is connected with the MCU, the battery box is used for providing 3V electric energy, the booster circuit boosts the voltage to 6V, the LDO stabilizes the voltage at 5V and provides stable voltage for the MCU and the driving module, when the wave switch is in a closed state or in the continuous output module, the booster circuit is closed, the MCU does not need to control the driving module, the MCU, the amplifier and the voltage difference sensor all need stable voltage, and the battery power supply voltage is obtained by the boosting and then reducing the voltage of the booster circuit due to instability of the battery power supply voltage; the driving module comprises an electromagnetic valve driving and protecting circuit, a booster circuit and an electromagnetic valve socket, the electromagnetic valve is installed on the electromagnetic valve socket, when the wave band switch is in an automatic flow adjusting mode and a fixed flow mode, the power supply module provides electric energy for the MCU, the MCU starts the battery valve driving and protecting circuit, and meanwhile, the booster circuit further boosts the voltage to 12V required by the electromagnetic valve so as to open the electromagnetic valve; the MCU is also connected with a red, green and blue direct-inserted indicator lamp which is used for synchronous display of the action of the electromagnetic valve, display of the action of the switch and display of the state of a product and fault maintenance indication.
The model of the electromagnetic valve 3 is VSONC-6S11-VE1F0, the electromagnetic valve is a two-position three-way electromagnetic valve, the power supply voltage is 12V, the power consumption is 1W, the pressure resistance is 200kPa, a hose can be directly connected, the inner diameter of the hose is 4mm, and the maximum size is about 50mm 24mm 16 mm; the type of the differential pressure sensor 4 is MP3V5010DP, the measuring range is 10kPa, the power supply voltage is 2.7-3.3V, two pipes are led out and can be directly connected to a hose, and a patch is welded on a PCB and used for converting the air pressure change in an air pipe during breathing into a voltage signal to be read by an MCU; the type of the band switch is MRA112(NKK), which has 8 gears; the boosting circuit adopts a silk-screen B6282A boosting chip with the model of SX1308, the voltage can be boosted to 12V from 2.5V, and the efficiency is more than 90%; the LDO adopts an LS883 type low-dropout linear regulator, the solenoid valve driving and protecting circuit adopts an IRF540 driving solenoid valve circuit, the amplifier adopts a German Volfa amplifier signal module with the model of VOL-RS232, the MCU adopts the model of MKE02Z64LVD4, the working pressure is 4.5-5.5V, and a Cotex-M series kernel is used for reading the shift of a waveband switch, sampling the change of a voltage signal of a differential pressure sensor, judging whether the suction action is carried out or not, and then controlling the solenoid valve to switch a passage to supply oxygen.
The method adopts a mode of automatically adjusting flow to provide oxygen for human body, and comprises the following steps:
1) the oxygen therapy mode is set by the band switch 505, and the oxygen therapy mode is set to the automatic flow rate adjustment mode;
2) in an initial state, the electromagnetic valve 504 is communicated with the oxygen output connector 502 and the differential pressure sensor 504 to seal the oxygen inlet pipe 501 and the oxygen output connector 502, and at the moment, the differential pressure sensor 504 senses the inspiration of a human body;
3) when the differential pressure sensor 504 senses that the human body inhales, and transmits the signal to the control circuit 506, the control circuit 506 changes the state of the electromagnetic valve 503, so that the electromagnetic valve 503 seals the oxygen output connector 502 and the differential pressure sensor 504, and the oxygen inlet pipe 501 and the oxygen output connector 502 are communicated to provide oxygen for the human body;
4) when the human body inspiration reaches the set length, the control circuit closes the electromagnetic valve,
here, the flow rate automatic adjustment mode is adopted, when the oxygen supply system is shipped, the time ratio of inspiration to expiration in one breath of the human body is set in the control circuit 506, the time ratio is generally 1:1.5 to 1:2, as shown in fig. 12, the inspiration start signal and the breathing frequency signal of the human body are obtained through the pressure difference sensor, the control circuit receives the signal obtained by the pressure difference sensor and records the data obtained by the pressure difference sensor in a plurality of inspirations and exhalations, the variation trend of the breathing period, the inspiration time length and the pressure difference size is statistically analyzed, the inspiration time length required by the next inspiration is calculated, the calculated inspiration time length required by the next inspiration is used as the set time length, the control circuit controls the on-off state of the electromagnetic valve according to the inspiration start signal and the set time length obtained by the pressure difference sensor,
for example, with a set time ratio of 1:2, the differential pressure sensor 504 senses 10 breaths, the interval time of the starting point of the 10 breaths is used as the time length of each breath, and the average time length of one breath is calculated as T according to the total time length of the 10 breathsGeneral assemblyLet T beGeneral assemblyWhen the time is 3 seconds, the inspiration time T of the human body in one breath can be calculated11 second, expiration time T2When the differential pressure sensor 504 senses that the human body inhales for 2 seconds, the time for the electromagnetic valve 503 to communicate the oxygen inlet pipe 501 and the oxygen output connector 502 is 1 second, and after 1 second, the electromagnetic valve 503 is closed;
5) and repeating the steps 2) to 4), outputting oxygen when the human body inhales, and stopping outputting the oxygen when the human body exhales.
The method adopts a fixed flow mode to provide oxygen for a human body, and comprises the following specific steps:
1) the oxygen therapy mode is set through the band switch, the oxygen therapy mode is set to be the fixed flow rate mode, meanwhile, the fixed time of each oxygen therapy is set through the band switch 505 under the fixed flow rate mode, in the embodiment, the fixed time of each oxygen therapy can be set to be 0.3 second, 0.5 second, 0.8 second, 1.2 second, 1.5 second or 2.0 seconds;
2) the electromagnetic valve 504 is communicated with the oxygen output connector 502 and the differential pressure sensor 504 to seal the oxygen inlet pipe 501 and the oxygen output connector 502, and at the moment, the differential pressure sensor 504 senses the inspiration of a human body;
3) when the differential pressure sensor 504 senses that the human body inhales, and transmits the signal to the control circuit 506, the control circuit 506 changes the state of the electromagnetic valve 503, so that the electromagnetic valve 503 seals the oxygen output connector 502 and the differential pressure sensor 504, and the oxygen inlet pipe 501 and the oxygen output connector 502 are communicated to provide oxygen for the human body;
4) when the human body inspiration reaches the set length, the control circuit 506 closes the electromagnetic valve, stops outputting oxygen, and the control device recovers to the state of the step 2);
5) and repeating the steps 2) to 4), outputting oxygen when the human body inhales, and stopping outputting the oxygen when the human body exhales.
When the oxygen therapy system is in an emergency state, for example, when the oxygen demand of a human body is large or the communication connection between the band switch and the control circuit is failed, the oxygen therapy mode can be modified into a continuous oxygen therapy mode through the band switch 505;
namely, the wave band switch 505 is rotated to rotate the cam 508 to the end of the second valve rod 510, and the second valve rod 510 is pushed against the cam protrusion 513 to compress the fourth spring 512, at this time, the third sealing ring 511 which is originally closely contacted with the reducing section of the valve block pipeline 509 is separated from the reducing section, a gap appears, the oxygen inlet pipe 501 and the oxygen output connector 502 are always in a conducting state, oxygen enters from the oxygen inlet pipe 501 and is continuously output from the nasal suction pipe on the oxygen output connector 502 after passing through the valve block pipeline, and the oxygen is continuously supplied for human body use.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (10)

1. A low temperature oxygen storage oxygen system which characterized in that: the device comprises a liquid injection device, a liquid-oxygen heat insulation storage tank, an emptying valve device, a pressure reducing valve device and a control device; the bottom of the liquid oxygen heat insulation storage tank is provided with a liquid inlet pipe, the top of the liquid oxygen heat insulation storage tank is provided with an air outlet pipe and a capillary pipe, and the liquid injection device is connected with the liquid inlet pipe of the liquid oxygen heat insulation storage tank; the air inlet end of the emptying valve device is communicated with an air outlet pipe of the liquid oxygen heat insulation storage tank; the pressure reducing valve device is provided with two air inlet ends and one air outlet end, the air outlet end of the emptying valve device is communicated with one air inlet end of the pressure reducing valve device through an air conveying pipeline, and the capillary tube is communicated with the other air inlet end of the pressure reducing valve device through a gasification pipeline; the control device is provided with a nasal suction pipe joint, and the air outlet end of the pressure reducing valve device is communicated with the nasal suction pipe joint through the control device.
2. The cryogenic oxygen storage and supply system of claim 1, wherein: the liquid oxygen heat insulation storage tank comprises a storage tank shell and a storage tank inner container, wherein the air outlet pipe is fixed at the top end of the storage tank inner container, the liquid inlet pipe is fixed at the bottom of the storage tank inner container, the storage tank shell is sleeved outside the storage tank inner container, a vacuum cavity is formed between the storage tank shell and the storage tank inner container, the liquid inlet pipe and the air outlet pipe both penetrate through the storage tank shell, and the outer walls of the liquid inlet pipe and the air outlet pipe are both fixed with the storage tank shell; the capillary tube is arranged in the air outlet tube, the bottom end of the capillary tube extends to the position, close to the bottom, of the inner cavity of the storage tank liner, the bottom end of the air outlet tube is located at the position, close to the top, of the inner cavity of the storage tank liner, the top end of the capillary tube penetrates out of the air outlet tube, and the outer diameter of the capillary tube is smaller than the inner diameter of the air.
3. The cryogenic oxygen storage and supply system of claim 2, wherein: the outer wall of the inner container of the storage tank is coated with a heat insulation material layer; a vacuumizing port is welded at the top end of the storage tank shell, and one end of the vacuumizing port is communicated with the vacuum cavity; the vacuum cavity is internally provided with a molecular sieve which is fixed on the outer wall of the inner container of the storage tank or the inner wall of the outer shell of the storage tank.
4. The cryogenic oxygen storage and supply system of claim 1, wherein: the liquid injection device comprises a buckle joint, a clamping sleeve joint and a liquid inlet valve rod, wherein the lower end of the clamping sleeve joint is provided with a liquid inlet, the upper end of the clamping sleeve joint is in threaded connection with the lower end of the buckle joint, a liquid inlet pipe is connected with the upper end of the buckle joint through a locking nut, a liquid oxygen channel communicated with the liquid inlet pipe is arranged in the buckle joint and the clamping sleeve joint, the lower end of the buckle joint is provided with a first fixing seat, the outer ring of the first fixing seat is fixed with the inner wall of the clamping sleeve joint, the center of the first fixing seat is provided with a through hole, a plurality of notches are circumferentially arranged on the first fixing seat, a gap is formed between the notch part of the fixing seat and the clamping sleeve joint, the size of the liquid inlet valve rod is smaller than the aperture of the through hole, the lower end of the liquid inlet valve, the lower end of the first spring is in contact with the upper surface of the convex ring, and the upper end of the first spring is in contact with the lower surface of the first fixed seat; the lower end of the buckle joint is also provided with a buckle part which is used for connecting the liquid oxygen supplementing tank when supplementing liquid oxygen, the buckle part is fixed with the buckle joint through a locking screw, and a first clamping groove is formed in the buckle part; a first sealing ring is arranged at the junction of the buckle joint and the ferrule joint; and a second sealing ring is arranged at the junction of the buckle joint and the buckle piece.
5. The cryogenic oxygen storage and supply system of claim 1, wherein: the emptying valve device comprises an emptying valve body and an emptying mechanism; the air release valve body is internally provided with an air inlet channel, an air outlet channel, an air release mechanism mounting hole and an air release channel, the air inlet channel is communicated with the air inlet end of the air release valve device, the air outlet channel is communicated with the air outlet end of the air release valve device, the air outlet channel and the air release mechanism mounting hole are both communicated with the air inlet channel, and the air release channel is communicated with the air release mechanism mounting hole; the emptying mechanism comprises a first valve rod, a wrench, a second spring and a first valve core, the first valve rod is arranged in an emptying mechanism mounting hole, the outer end of the first valve rod extends out of an emptying valve body, the first valve core is arranged at the inner end of the first valve rod, the first valve core is matched with an inner side hole opening of the emptying mechanism mounting hole, the second spring is sleeved on the outer ring of the first valve rod, two ends of the second spring are respectively supported on the first valve core and the emptying valve body, the wrench is hinged with the part of the first valve rod extending out of the emptying valve body through a rotating shaft, a first contact surface and a second contact surface are arranged on the wrench, the vertical distance from the first contact surface to the rotating shaft is smaller than that from the second contact surface to the rotating shaft, and the first contact surface or the second contact surface is in contact with the outer wall of the emptying valve body; the valve body of the emptying valve is also provided with a first safety valve which is communicated with the air inlet channel.
6. The cryogenic oxygen storage and supply system of claim 1, wherein: the pressure reducing valve device comprises a first valve body, a second valve body and a pressure reducing valve body; a first oxygen channel is arranged in the first valve body, one end of the first oxygen channel is connected with the air outlet end of the emptying valve through an oxygen conveying pipeline, and the other end of the first oxygen channel is communicated with the pressure reducing valve body; the inside second oxygen passageway, third oxygen passageway and relief pressure valve device air outlet channel of being equipped with of second valve body, the one end of second oxygen passageway is passed through liquid oxygen gasification pipeline and is connected with the capillary, the other end and the relief pressure valve device air outlet channel intercommunication of second oxygen passageway, the one end and the relief pressure valve body intercommunication of third oxygen passageway, the other end and relief pressure valve device air outlet channel intercommunication, relief pressure valve device air outlet channel is connected with the nasal suction tube coupling through oxygen therapy pipe and controlling means.
7. The cryogenic oxygen storage and supply system of claim 6, wherein: relief pressure valve body include the second fixing base, the third spring, movable block and elastic sealing membrane, the bottom at relief pressure valve body is fixed to the second fixing base, the third spring is installed at relief pressure valve body with the movable block, the both ends of third spring respectively with second fixing base and movable block in close contact with, elastic sealing membrane's lower surface and movable block in close contact with, elastic sealing membrane's upper surface hugs closely the pipeline mouth of first oxygen passageway and the pipeline mouth of third oxygen passageway when the closure state, the axle center of third oxygen passageway aligns with elastic sealing membrane's center, the center of the skew elastic sealing membrane of the axle center of first oxygen passageway.
8. The cryogenic oxygen storage and supply system of claim 6, wherein: the pressure reducing valve assembly further includes a second relief valve in communication with the first oxygen passage.
9. The cryogenic oxygen storage and supply system of claim 1, wherein: the gas transmission pipeline and the gasification pipeline are wound outside the liquid oxygen heat insulation storage tank.
10. An oxygen supply method based on the cryogenic oxygen storage and supply system of claim 1, characterized in that: which comprises the following steps:
s1, closing the control device, releasing residual oxygen in the liquid oxygen heat insulation storage tank through the emptying valve device, and then filling liquid oxygen into the liquid oxygen heat insulation storage tank through the liquid injection device;
s2, opening the control device, enabling gasified oxygen in the liquid oxygen heat insulation storage tank to enter an emptying valve device through an air outlet pipe, enabling the gasified oxygen to enter a pressure reducing valve device through an air transmission pipeline, enabling the liquid oxygen to enter a gasification pipeline through a capillary pipe, and enabling the gasified oxygen in the gasification pipeline to enter the pressure reducing valve device;
s3, the pressure reducing valve device reduces the pressure of the oxygen, and the oxygen after pressure reduction is supplied to the human body through the nasal suction tube connected to the nasal suction tube joint.
CN202010633158.8A 2020-07-02 2020-07-02 Low-temperature oxygen storage and supply system and oxygen supply method based on same Pending CN111729166A (en)

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