109 results about "High oxygen" patented technology

The invention discloses a molecular film type automotive nitrogen and oxygen separation device which comprises a turbocharger, a nitrogen and oxygen separator, a gas inlet valve, a gas outlet valve, a negative pressure pump and an electric control throttling valve. The turbocharger is driven by a turbine in an automobile turbocharger, so that the air is compressed to be conveyed to two paths of the nitrogen and oxygen separation device, the nitrogen and oxygen separation device can separate oxygen from the air, the air with high oxygen content is output, and the air is supplied to an engine for use through the gas outlet valve. The two paths of the nitrogen and oxygen separation device work alternately, when the temperature of the two paths of the nitrogen and oxygen separation device is too high to influence oxygen production efficiency, a main air inlet pipeline is opened to provide air normally by controlling the opening degree of the electric control throttling valve, and thus the phenomena of gas circuit plugging and engine stalling are avoided. According to the automotive nitrogen and oxygen separation device, the two branch paths work alternately, high concentration oxygen can be supplied to the engine continuously so that fuel can burn and act, and the burning utilization rate of the fuel is improved.

The invention discloses an intelligent cooperative regulation and control method and system for dissolved oxygen in a haematococcus culture solution, relates to the field of bioengineering, and controls a decision-making layer to dynamically switch between a growth promotion regulation and control mode and a stress induction regulation and control mode based on biomass data and physiological status data in a haematococcus culture stage so as to realize cooperative regulation and control of dissolved oxygen, illumination, pH and a carbon source. According to the method, a growth promotion mode and a stress induction mode are dynamically switched, biomass accumulation is promoted through dissolved oxygen sine wave pulse fluctuation in the vegetative period, astaxanthin synthesis is induced through high-oxygen and low-oxygen circulation and blue light regulation in the stress period, and compared with traditional static regulation, the biomass is increased, and the yield of astaxanthin is increased. A light-oxygen synergistic factor k is introduced to dynamically adjust the fluctuation range of dissolved oxygen, the problem of illumination-dissolved oxygen mismatching is solved, and the photosynthetic efficiency is improved; a stress intensity index SI is established, stress parameters are adaptively optimized based on the astaxanthin synthesis rate, cell damage caused by over-stress is avoided, and the stability of the astaxanthin synthesis rate in the stress period is improved.

The invention discloses a high-oxygen-permeability membrane material and a preparation method thereof, and belongs to the technical field of membrane materials. The membrane material is prepared by taking polydimethylsiloxane and polycaprolactone as organic raw materials, adding an inorganic material nano titanium dioxide or graphene, and carrying out solution preparation, cross-linking reaction, casting membrane formation, hot press molding, plasma treatment and surface modification. The polydimethylsiloxane guarantees the oxygen permeability, the polycaprolactone improves the flexibility and the biocompatibility, and the nano inorganic particles enhance the mechanical strength and the antibacterial property. The prepared membrane material is improved in oxygen permeability coefficient, greatly improved in tensile strength and elongation at break, good in hydrophilicity and biocompatibility, low in cytotoxicity and small in hemolysis rate, can be widely applied to medical products such as artificial lungs, wound dressings and contact lenses, and effectively meets the requirements of the medical field for the membrane material with high oxygen permeability and good comprehensive performance.

The invention particularly relates to a low-carbon robust short-cut nitrification process, which is used for low-carbon treatment of various ammonia-nitrogen-containing wastewater. The device has the characteristics that oxygen is supplied in a manner of combining micro-nano pre-aeration with external circulation, so that the device has higher oxygen supply uniformity, the reaction rate and the DO utilization rate in the short-cut nitrification reactor are greatly improved, meanwhile, accurate oxygen supply is realized, the oxygen supply energy consumption is effectively reduced, and carbon emission is reduced; according to the invention, oxygen is supplied in a manner of combining pre-aeration with external circulation, so that the concentration of DO in the short-cut nitrification reactor is ensured, meanwhile, N2O release caused by bubble disturbance is avoided, N2O emission factors in the short-cut nitrification process are effectively reduced, and low-carbon short-cut nitrification is realized; by coupling alkaline inhibition and salt inhibition, NOB activity is effectively controlled, and long-term stability of short-cut nitrification is realized.

Existing pulse oximeters have impaired accuracy in measuring blood oxygen levels (SpO2) in patients of color, where the presence of melanin in the skin tends to interfere with measurements of pulse oximetry, resulting in an overestimation of SpO2. Thus, the pulse oximeter often reports a higher oxygen saturation for patients with darker skin tones, often with increasing bias as the actual saturation (SaO2) decreases. This bias is further reinforced by calibration based on individuals with light skin pigmentation, which may lead to inequitable healthcare for patients of color. Our proposed solution is to modify current pulse oximetry calculations—which utilize the relative tissue absorbance of red and infrared light to estimate SpO2—to account for the concentration of melanin by additionally measuring the skin absorbance of UV˜A light. This derived concentration of melanin can then be used to modify the pulse oximetry algorithm output, thus estimating SpO2 more accurately for patients of color.

The invention relates to a fatigue life prediction method based on a physical failure mechanism in a liquid lead bismuth environment, and the method comprises the following steps: building a representative volume element model, and defining elements belonging to a slip band; defining a crystal plasticity constitutive equation; determining parameters in the crystal plasticity constitutive equation; calculating the average shear strain range of the slip band; carrying out a fracture toughness test to obtain specific fracture energy; establishing a fatigue life prediction model based on a physical failure mechanism; carrying out a symmetrically cyclic low-cycle fatigue test on the metal material in a predicted-temperature high-oxygen liquid lead bismuth environment to determine the thickness of an oxide film; and establishing a fatigue life prediction model in the high-oxygen-concentration liquid lead bismuth environment, and predicting the fatigue life of the metal material in the high-oxygen-concentration liquid lead bismuth environment. According to the method, the fatigue life in the liquid lead-bismuth environment can be predicted by carrying out a low-cycle fatigue test for calibrating crystal plasticity constitutive equation parameters in the air at the predicted temperature and a fracture toughness test in the air and liquid lead-bismuth environment.

A tuyere apparatus according to the present invention comprises: an outer circulation hole disposed on the outermost peripheral side inside a tuyere; and an inner circulation hole disposed on the inner peripheral side of the outer circulation hole. The inner circulation hole has two or more independent flow paths, the two or more independent flow paths being separated from the inner surface of the tuyere. A blast furnace operation method according to the present invention comprises, using the above-described blast furnace tuyere apparatus in a blast furnace: blowing a low oxygen concentration gas, a high oxygen concentration gas having an oxygen concentration higher than that of the low oxygen concentration gas, and a reduction material from the tuyere; blowing the low concentration oxygen gas from the outer circulation hole; blowing the high oxygen concentration gas and the reduction material from the inner circulation hole; and blowing the high oxygen concentration gas and the reduction material separately from the two or more independent flow paths.

The present invention discloses an air path structure in which an ordinary vacuum pump replaces a high-oxygen vacuum pump. The air path structure is connected to an upper mold cavity (1) and a lower mold cavity (2), and comprises a first compressed air path, a vacuum pump path, a fresh-keeping gas path, and a second compressed air path. The second compressed air path comprises a second compressed air pipeline. A solenoid valve E (11) is provided on the second compressed air pipeline. The second compressed air pipeline is connected to a pipeline connecting the fresh-keeping gas path and the vacuum pump path. The vacuum pump path is a vacuum pump path using an ordinary vacuum pump. The present invention adds an additional compressed air path to the ordinary vacuum pump path, thereby completely solving the adverse effects of high-concentration O2 on the vacuum pump.

The invention relates to the technical field of ferrite single-crystal materials, in particular to a treatment method for improving the ferromagnetic resonance line width of spinel NiZn ferrite single-crystal pellets, which comprises the following steps: annealing the spinel NiZn ferrite single-crystal pellets under the conditions of high oxygen pressure and high temperature, slowly cooling to room temperature, and releasing the pressure after the annealing is finished, thereby obtaining the spinel NiZn ferrite single-crystal pellets. According to the method, the NiZn ferrite single crystal pellets are subjected to annealing treatment by adopting a high-oxygen-pressure high-temperature annealing treatment process, the pellet processing stress can be released under the condition of inhibiting Zn element volatilization, the ferromagnetic resonance line width of the NiZn ferrite single crystal pellets can be effectively reduced, and subsequent pellet surface polishing treatment is also facilitated.

The present invention generally relates to an insert for embedding in a silicone hydrogel contact lens. The insert is made of a cross-linked material that is rigid in a dry state at room temperature (from about 22°C to about 26°C), has a high oxygen permeability and a high refractive index in a fully hydrated state, and can become softer at temperatures greater than 32°C. Such a material can be used to manufacture an insert for embedding in a contact lens to correct corneal astigmatism, presbyopia, and color blindness, and to impart photochromic properties to the lens. The present invention also relates to a method for manufacturing an embedded silicone hydrogel contact lens including the insert of the present invention, and to an embedded silicone hydrogel contact lens including the insert of the present invention.

The high-oxygen ischemia pre-adaptation device comprises a high-oxygen module and an ischemia pre-adaptation module, the high-oxygen module comprises an oxygen bottle, an oxygen electromagnetic valve and a nasal catheter, the oxygen bottle is fixedly connected with the input end of the nasal catheter through the oxygen electromagnetic valve, and the other end of the nasal catheter is used for a user to inhale oxygen; the ischemia pre-adaptation module comprises an air pump and an ischemia pre-adaptation assembly, the ischemia pre-adaptation assembly comprises a circuit control board, a high-pressure electromagnetic valve, a low-pressure electromagnetic valve, a pressure reducing valve and a cuff connecting pipe, the input end of the high-pressure electromagnetic valve is fixedly connected with the output end of the air pump, and the output end of the high-pressure electromagnetic valve is fixedly connected with the input end of the pressure reducing valve; the output end of the pressure reducing valve is fixedly connected with the input end of the low-pressure electromagnetic valve, and a cuff connecting pipe is arranged between the pressure reducing valve and the low-pressure electromagnetic valve and used for being connected with a cuff. The high-oxygen ischemia preconditioning device provided by the invention can better treat the user, and can shorten the treatment cycle, so that the treatment effect reaches an expected ideal level.

The application provides a device system and a method for preparing isotopically labeled carbon dioxide, and the preparation method comprises the following steps: vaporizing heavy oxygen water, mixing the heavy oxygen water with carbon dioxide, catalyzing through a catalytic material, carrying out oxygen exchange reaction between the heavy oxygen water and the carbon dioxide, carrying out gas-liquid separation after the reaction, and obtaining isotopically labeled carbon dioxide. The device system provided by the application has the advantages of simple structure, wide source and low price of heavy oxygen water as an oxygen isotope source, oxygen exchange, replacement of oxygen-16 of conventional carbon dioxide by oxygen-18 of the heavy oxygen water, oxygen-18 isotopically labeled carbon dioxide products, simple process, green and pollution-free, high oxygen isotope utilization rate, mild separation and purification conditions, good economic benefits and application prospect.

The invention relates to the technical field of solid oxide electrolytic cells, in particular to an A-site high-entropy perovskite oxide with oxygen octahedron distortion and a preparation method and application thereof. The chemical formula of the oxide is Nd < 0.2 > Pr < 0.2 > La < 0.2 > Ba < 0.2 > Sr < 0.2 > CoO < 3-delta >, wherein delta is the oxygen vacancy content. The oxide has lattice oxygen after being subjected to high entropy, so that oxygen ions move more easily, the oxygen evolution reaction activity is improved, meanwhile, the local environment of the oxygen ions is changed after high entropy, local oxygen octahedral distortion occurs, the oxygen ions are more active, the oxygen migration rate is further increased, the high oxygen evolution reaction activity is shown, and the oxygen evolution reaction activity is improved. Therefore, the yield of cathode carbon monoxide is improved.

The invention provides a degradable contact lens and a preparation method thereof, and belongs to the technical field of contact lenses. The preparation method comprises the following steps: firstly, dissolving collagen in an acetic acid solution to obtain a collagen solution; dissolving hyaluronic acid in water to obtain a hyaluronic acid solution; the hyaluronic acid is formed by mixing first hyaluronic acid and second hyaluronic acid, the molecular weight of the first hyaluronic acid is 50-300 kDa, and the molecular weight of the second hyaluronic acid is 800-1500 kDa; and finally, mixing the collagen solution and the hyaluronic acid solution, and sequentially carrying out first crosslinking, second crosslinking and post-treatment to obtain the contact lens. The contact lens prepared by the invention has high oxygen permeability, proper mechanical properties and controllable degradability.

The utility model discloses a plateau heat preservation oxygen generation vest which comprises a vest body, a heating device is arranged on the outer side of the back of the vest body, the heating device is respectively connected with an inlet end and an outlet end of a circulating water pipe, and the circulating water pipe extends between an inner interlayer and an outer interlayer of the vest body and spirally ascends in the interlayers. An oxygen generating device is arranged on one side of the heating device in parallel, the oxygen generating device is connected with an oxygen guide pipe, the oxygen guide pipe extends into the interlayer and surrounds the circulating water pipe, the outlet end of the oxygen guide pipe extends out of the neckline of the vest body, and the extending end of the oxygen guide pipe is connected with a breathing mask. The oxygen generating device has the advantages that oxygen is generated on the basis of chemical reaction, the oxygen generating device is high in oxygen generating efficiency, simple in structure, convenient to use and applicable to special environments, circulating water can be heated by the aid of the heating device, so that a certain heat insulation effect is achieved for users, and oxygen is heated to be conveniently absorbed by the users.

The utility model belongs to the technical field of respirators, and particularly discloses a portable respirator which comprises a pressing part, the top of the pressing part is communicated with a conveying pipe, the top of the conveying pipe is communicated with an oxygen inhalation mask, and an adjusting assembly is arranged in the conveying pipe. The adjusting assembly comprises a pressure disc, a plurality of pressure holes are formed in the pressure disc, the diameters of the pressure holes are different, an adjusting disc is rotationally connected to the interior of the conveying pipe, adjusting holes are formed in the adjusting disc, the adjusting disc is located above the pressure disc, and a friction groove is formed in the gap where the conveying pipe and the adjusting disc are rotationally connected. According to the oxygen therapy apparatus, the oxygen therapy pressure can be dynamically adjusted according to the actual situation of a patient through the arrangement of the adjusting assembly, oxygen poisoning or respiratory tract injury caused by the too high oxygen therapy pressure is avoided, the situation that the oxygen demand of the patient cannot be met due to the too low oxygen therapy pressure is also prevented, and the treatment effect is improved.

The application discloses a kind of high oxygen storage cerium zirconium solid solution materials and preparation method, belong to rare earth catalytic material technical field, the method includes the following steps: precursor preparation, ultrasonic dispersion, double gradient precipitation, ultrasonic aging, solid-liquid separation, three-stage calcination and cooling with furnace.The application avoids coarse grain and uneven particle size distribution through the synergistic effect of double gradient precipitation and ultrasonic aging, so that the material is not easy to occur grain abnormal growth and structure collapse in long-term high temperature service.At the same time, the gradient calcination process controls the crystal densification and lattice reconstruction by steps, reduces the separation of fluorite phase and pyrochlore phase which is easy to occur in traditional low temperature single-stage calcination, maintains the stable crystal phase structure, ensures that the material can still retain sufficient active surface and pore structure under high temperature, thermal shock alternating working condition, significantly improves the oxygen storage capacity and long-term durability of catalyst carrier.

The application discloses an air inlet and outlet valve for an oxygen generator, which comprises a fixed valve plate and a movable valve plate, the end face of the fixed valve plate facing the movable valve plate is a fixed end face, the end face of the movable valve plate facing the fixed valve plate is a movable end face, the fixed end face and the movable end face are in contact and sealed, the movable end face is further provided with oxygen conveying grooves which are always in communication with oxygen guide grooves, the oxygen conveying grooves are sequentially communicated with oxygen guide holes when the movable valve plate moves, the oxygen conveying grooves are provided with two, one of the oxygen conveying grooves is simultaneously communicated with an air guide groove and a molecular tower when the movable valve plate moves, the molecular tower realizes air inlet and oxygen outlet, the other oxygen conveying groove is simultaneously communicated with a nitrogen outlet groove and another molecular tower, the other molecular tower realizes nitrogen outlet and oxygen back flushing, and the air inlet and outlet valve for the oxygen generator has the advantages of simple structure, good sealing effect, complete nitrogen analysis, high oxygen production capacity and efficiency and long service life.

The embodiment of the invention provides a monitoring cabin which comprises a containing cabin and an oxygen supply system, and the oxygen supply system comprises a first oxygen conveying assembly and a second oxygen conveying assembly; the first oxygen conveying assembly comprises a first switch valve and a first oxygen conveying pipeline, and when the first switch valve is opened, an external oxygen source can convey oxygen into the monitoring cabin through the first oxygen conveying assembly; the second oxygen conveying assembly comprises a second switch valve and a second oxygen conveying pipeline, and when the second switch valve is opened, the external oxygen source can convey oxygen into the monitoring cabin through the second oxygen conveying assembly; the oxygen flow rate of the first oxygen conveying pipeline when the first switch valve is opened is larger than the oxygen flow rate of the second oxygen conveying pipeline when the second switch valve is opened, and the oxygen flow rate is the flow rate of oxygen input into the containing cabin. The oxygen supply system can supply oxygen into the monitoring cabin at different oxygen flow rates based on the first oxygen supply pipeline and the second oxygen supply pipeline, the flow capacity is high, oxygen can be supplied into the monitoring cabin at a high oxygen flow rate, and the oxygen concentration in the monitoring cabin can be rapidly increased within a short time.

The present application relates to the field of detergent, and discloses a high-oxygen-containing detergent composition with stable viscosity and a preparation method thereof, the detergent composition comprises the following components by mass percentage: 3.5-8.0% hydrogen peroxide, 1-10% anionic surfactant, 5-14% nonionic surfactant, 0.5-3% thickening agent, 0.002-0.02% hydrogen peroxide stabilizer, neutralizer, and water in remainder; the pH of the detergent composition is 4-7. The detergent composition has high effective oxygen content and long-term viscosity stability, the surfactant and hydrogen peroxide can jointly act on stains to quickly remove stains and restore the whiteness of clothes. Moreover, the preparation method has the characteristics of simple process and being conducive to long-term viscosity stability.

The present invention discloses a high oxygen vacancy titanate nanomaterial and a preparation method thereof, which belongs to the technical field of nanomaterial preparation. Titanium silicon carbide is mixed with an alkaline solution containing potassium fluoride, and oxygen is continuously introduced while heating in an oil bath to obtain a high oxygen vacancy titanate nanomaterial. The high oxygen vacancy content gives the material more potassium storage sites, effectively improving the diffusion rate and storage capacity of potassium ions. In addition, the increase in the lamellar tissue distance in the structure allows potassium ions to shuttle more freely between nanolayers, greatly enhancing the electrochemical properties of the material. This excellent lamellar structure also provides more channels for electron conduction, effectively promoting the rapid transfer of electrons inside and outside the active particles, thereby further improving the rate performance of the electrode material. The high oxygen vacancy titanate nanomaterial has broad application prospects in the fields of sustainable energy, energy storage devices, and electric vehicles.

The present invention discloses an oxygen concentrator, comprising a housing, a nitrogen-oxygen separation tower, a positive- and negative-pressure air compressor, an oxygen storage tank, and a control unit. The positive- and negative-pressure air compressor, the nitrogen-oxygen separation tower, the oxygen storage tank, the ultrasonic flowmeter, the electromagnetic proportional valve, and the oxygen outlet of the housing are sequentially connected. The oxygen storage tank, the housing, and the oxygen outlet of the housing are respectively equipped with a first pressure sensor, a second pressure sensor, and a pulsating pressure sensor electrically connected to the control unit. The control unit controls the motor speed of the positive- and negative-pressure air compressors to achieve continuous high-oxygen-concentration oxygen output based on a comparison between a pressure detection value of the first pressure sensor or the second pressure sensor and a preset value. The control unit adjusts the opening state of the electromagnetic proportional valve according to the respiratory pressure difference detection value of the pulsating pressure sensor, thereby adjusting the oxygen output flow rate. The present invention has the advantages of maintaining continuous oxygen supply at high oxygen concentrations in high-altitude areas, dynamically adjusting the oxygen output flow rate according to differences in human vital capacity, and ensuring high oxygen absorption efficiency.

The utility model relates to the field of electric appliances, and particularly discloses refrigeration equipment. The refrigeration equipment comprises a box body, a first chamber, a second chamber and an oxygen adjusting device, wherein the first chamber and the second chamber are positioned in the box body; the oxygen adjusting device is positioned between the first chamber and the second chamber; the oxygen adjusting device comprises an oxygen adjusting cavity formed in the oxygen adjusting device and an electrolysis module located in the oxygen adjusting cavity, the first chamber and the second chamber communicate with the oxygen adjusting cavity, and the electrolysis module is used for transferring oxygen in the oxygen adjusting cavity to the outside of the oxygen adjusting cavity so as to reduce the air pressure in the oxygen adjusting cavity. According to the oxygen adjusting device, a fan does not need to be arranged in the oxygen adjusting device, under the action of the electrolysis module, the oxygen content and the air pressure in the oxygen adjusting cavity can be reduced together, and therefore air with the high oxygen content in the first chamber and the second chamber can be diffused into the oxygen adjusting cavity with the low oxygen content. The oxygen content in the first chamber and the second chamber can be reduced, air does not violently move in the first chamber and the second chamber, and freshness retaining of food materials is facilitated.

The oxygen supply intervention system comprises a rack, an oxygen bottle, an airflow control valve, a corrugated pipe, an oxygen mask, a first square pipe, a limiting plate, a limiting hole, a second square pipe and a sliding assembly, a mounting table is arranged at the top of the second square pipe, a rotating plate is rotatably arranged on the mounting table, and a sliding plate is horizontally and slidably arranged on the rotating plate; an alarm assembly is arranged on the sliding plate, an opening is formed in the sliding plate, a first pipe clamp is arranged in the opening, a mounting rod is horizontally arranged on one side of the rotating plate, and a guide pipe is arranged at the end, away from the rotating plate, of the mounting rod. The corrugated pipe is limited through the limiting hole, the first pipe clamp and the guide pipe, so that the corrugated pipe droops from the upper portion of the front side of the user to be connected with the oxygen mask, the situation that when the corrugated pipe is accidentally pulled by interfering with movement actions of the user, the first pipe clamp and the sliding plate move is avoided, and when the alarm assembly detects that the sliding distance of the sliding plate is large, the alarm assembly reminds the user.

This invention relates to a barrier paper comprising a paper base material and a carboxymethyl cellulose coating layer formed on a surface of the paper base material, wherein the paper base material is a cellulosic paper and the carboxymethyl cellulose coating layer comprises 80-100% by weight of carboxymethyl cellulose, based on dry weight.

A refrigeration apparatus, comprising a container and an oxygen control module, wherein the oxygen control module is in communication with the container for adjusting the oxygen content in the container. The oxygen concentration inside the container of the refrigeration apparatus provided in the present application can be controlled by the oxygen control module, so as to create a low-oxygen or high-oxygen environment, thereby meeting the freshness preservation storage requirements of different food materials.

The application discloses a method for efficiently oxidizing benzaldehyde by using the high oxygen dissolving capacity of fluorocarbon compounds. The method uses the high oxygen dissolving capacity of fluorocarbon compounds, so that the oxygen dissolved in the fluorocarbon compounds and the benzaldehyde dissolved in the alkane can efficiently perform the oxidation reaction under normal temperature, normal pressure and low-speed stirring. Meanwhile, the fluorocarbon compounds can be separated by standing due to the chemical reaction inertness of the fluorocarbon compounds and the difference characteristics of the physical and chemical properties of the fluorocarbon compounds and the hydrocarbon compounds, so that the recycling of the fluorocarbon compounds is realized. The oxygen dissolved in the fluorocarbon compounds is used as a weak oxidizing agent, and the oxidation reaction occurs in the liquid phase, so that the effect of no residue of the oxidizing agent is realized. Compared with no addition of the fluorocarbon compounds, the conversion rate of the benzaldehyde is increased by 4 times, and the efficient oxidation of the benzaldehyde is realized.

The application discloses a preparation method of high-purity calcium fluoride. The application provides a synthesis method of calcium fluoride, which comprises the following steps: Ca(LIGAND)2 is reacted with a fluorination reagent to generate calcium fluoride in an organic solvent; wherein LIGAND is a beta-diketone ligand. The synthesis method provided by the application avoids the problems of severe reaction conditions and easy corrosion and impurity introduction in a traditional dry method, and the problems of high oxygen content and filtration difficulty caused by a wet method containing a water system, and high-purity, anhydrous, low-oxygen, high-crystallinity calcium fluoride can be obtained.

The present invention belongs to the field of laser cutting technology, and specifically relates to a low-power, high-oxygen laser flame composite cutting machine for medium and thick plates. It comprises a fiber laser, the output end of which is fixedly connected to a focusing tube, and the outer portion of the focusing tube is sequentially sleeved with an upper gas pipe, a middle gas pipe, and a lower gas pipe from top to bottom; the upper gas pipe, the middle gas pipe, and the lower gas pipe are sequentially fixedly connected; the present invention not only realizes the oxygen supply for flame cutting and realizes the blowing treatment of the cutting position to avoid flying slag, but also only requires a single oxygen inlet pipe to realize two oxygen supplies and avoid oxygen occupying the laser pipe. The structure and operation are simple while comprehensively avoiding the generation of cutting quality problems; the present invention can not only accurately control the oxygen and fuel gas ratio of flame cutting, but also ensure that oxygen is always blown out at the end of the lower gas pipe, and can flexibly switch without unnecessary complicated operations to ensure the safety of the equipment at all times.

The application provides an animal model of high-oxygen-induced retinal neovascular disease and a preparation method thereof. The method comprises the following steps: placing a mouse born for 3-7 days in an environment with an oxygen concentration of 75-85%, and maintaining for 10-30 days. The method can successfully induce a long-acting retinal neovascular disease model, has a high modeling rate, fewer complications, more persistent retinal neovascular lesions, and a model duration of 55 days. The animal model provides a more optimal model for exploring long-acting anti-retinal neovascular related drugs.