413 results about "Liquid oxygen" patented technology

The invention discloses a liquid air energy storage system based on air separation, which is characterized by comprising an air purification unit, an energy storage unit, an air rectification unit and an LNG (Liquefied Natural Gas) cold supply unit, wherein the air purification unit comprises an air filter, an air compressor, a first cooler, an adsorber and a first heater, and the energy storage unit comprises a first liquid separation tank, a liquid air storage tank, a liquid air pump and an air expansion machine. The air rectification unit comprises a rectification tower, a main cold box, a second liquid separation tank, a second subcooler, a first heat exchanger, a liquid nitrogen storage tank, a liquid oxygen storage tank, a second heat exchanger, an argon rectification system and a liquid argon storage tank; and the LNG cold supply unit comprises a first nitrogen supercharger, a second nitrogen supercharger, an LNG cold box and a first subcooler. The system has the functions of air separation and electric energy storage at the same time, and cold energy of the LNG receiving station is fully utilized for air separation and energy storage to participate in construction of a novel power system of a power grid.

The invention belongs to the technical field of carbon fiber composite materials, and particularly relates to a carbon fiber reinforced composite material for an aerospace low-temperature storage tank and a preparation method of the carbon fiber reinforced composite material. The preparation method of the carbon fiber reinforced composite material for the aerospace low-temperature storage tank comprises the following steps: (1) preparing a polyamide acid prepolymer solution; (2) adding the polyamide acid prepolymer solution, a phosphorus-containing flame-retardant monomer and nano nitrile rubber into a solvent for reaction to prepare a sizing agent; (3) carbon fibers are soaked in the sizing agent, taken out and dried, and sized carbon fibers are obtained; and (4) mixing nano nitrile rubber with a resin matrix, and then carrying out prepolymerization and thermal imidization curing molding on the mixture and the sized carbon fibers to obtain the carbon fiber composite material. The carbon fiber reinforced composite material obtained by the invention not only has excellent liquid oxygen compatibility, but also can maintain excellent leakage resistance and mechanical properties in an extremely high and low temperature cycle environment, and provides technical support for application of aerospace low-temperature storage tanks.

The utility model provides a bamboo joint type oxygen inhalation inner core assembly and a fracturing pipe, relates to the technical field of expansion fracturing, and comprises an inner core, the inner core comprises an infusion tube, liquid outlets are arranged in the circumferential direction of the infusion tube, a first quick connector with a central through hole is arranged at the lower end of the infusion tube, a medium layer is arranged outside the infusion tube, and a second quick connector with a central through hole is arranged outside the medium layer. The dielectric layer is used for absorbing liquid oxygen in the infusion tube; the at least one electronic excitation unit comprises an ignition head and an excitation cartridge bag, the excitation cartridge bag is arranged outside the dielectric layer, and the ignition head is used for igniting the excitation cartridge bag; the inner cores are connected end to end through first quick connectors. The oxygen inhalation inner core assembly is formed by sequentially connecting the multiple inner cores end to end, so that the oxygen inhalation inner core assembly can be flexibly adjusted and assembled in the length direction and the radial direction according to the length and the diameter of the fracturing pipe.

The utility model provides an upper end cover of a liquid oxygen fracturing pipe suitable for underwater rock mass, and relates to the technical field of expansion fracturing, the upper end cover comprises an end cover body, the upper surface of the end cover body is provided with counter-force petals, the counter-force petals are annularly arranged on the upper surface of the end cover body, and the counter-force petals are arranged on the lower surface of the end cover body. The counter-force petals are arranged on the upper end cover, an acute included angle alpha is formed between the counter-force petals and the axial direction of the end cover body, the counter-force petals are made of semi-rigid materials, the end cover body is used for being detachably connected with a fracturing pipe, and the counter-force petals are arranged on the upper end cover, so that the counter-force petals can be clamped to the inner wall of a blast hole, the buoyancy effect of water on the fracturing pipe is counteracted, and the fracturing effect is improved. And therefore, an operator can mount the fracturing pipe at the bottom of the blast hole.

A device and a method for producing hydrogen and byproduct oxygen by using green electricity electrolyzed water are provided. The device comprises an oxygen purifying system, a heat exchange system, an air separation compression and expansion system, an air separation rectification system and a liquid oxygen storage system. The method comprises the following steps: first, purifying oxygen prepared by electrolyzing water by green electricity to remove impurities such as hydrogen, carbon monoxide, carbon dioxide and water in the oxygen, then feeding the pure oxygen into the heat exchange system, performing heat exchange liquefaction to obtain liquid oxygen, coupling the liquid oxygen generated by rectification of the air separation rectification system, and obtaining pressurized oxygen through the heat exchange system and the air separation compression and expansion system.

The invention relates to an adjusting method capable of adjusting flow parameters in a poor krypton tower, and belongs to the technical field of system parameter adjustment or regulation and control. 2, deviation calculation and coupling modeling are carried out, wherein through a poor krypton tower flow-working condition coupling model, the tower inlet air flow adjusting amount, the poor krypton outlet pressure adjusting amount and the liquid oxygen backflow flow adjusting amount are output; 3, multi-actuator cooperative adjustment is carried out; 4, self-adaptive optimization: recording the convergence trend of the adjusted deviation value in real time; step 5, fault redundancy regulation and control: when any sensor fails, automatically switching to a redundancy mode, and evaluating the failed sensor according to the parameter association relationship between the measured data of the other two sensors and the flow-working condition coupling model of the poor krypton tower; the method has the beneficial effect that stable adjustment of flow parameters in the poor krypton tower is realized.

The invention discloses a high-power multi-channel independent delay detonation control system which comprises a main controller, the main controller is connected with an integrated cabinet, a battery pack module, an inverter module and a rectifier module are arranged in the integrated cabinet, and a controller module, the battery pack module, the inverter module, the rectifier module and the controller module are connected in sequence; a heat dissipation system is arranged in the integrated cabinet, and the controller module is connected with an ignition device in the blast hole. The invention further discloses a high-power multi-channel independent delay detonating control method, the problems that existing detonating equipment is short in discharging time, small in discharging current, low in discharging power and few in output channel are solved, and the high-power multi-channel independent delay detonating control method can be widely applied to bursting balloons and detonating fireworks and crackers. And the device can also be used as detonating equipment for an explosive blasting technology, a carbon dioxide blasting technology and a liquid oxygen rock breaking technology.

The invention provides a conversion system and a conversion process for preparing methanol from coke oven gas, and relates to the technical field of processes for preparing methanol from coke oven gas. The conversion system for preparing methanol from coke oven gas comprises an oxygen supply module at least provided with an air separation oxygen supply unit and an oxygen supply compressor which are communicated with each other; a mixing module having at least a first mixing unit and a second mixing unit; and the conversion module is communicated with the first mixing unit and the second mixing unit. Wherein the oxygen supply compressor is further communicated with a liquid oxygen supply unit, and the liquid oxygen supply unit is used for supplementing supplied oxygen; the first mixing unit is communicated with the oxygen supply compressor, and the first mixing unit is communicated with a steam generator and carbon dioxide supply equipment; the second mixing unit is communicated with the steam generator and the coke-oven gas compressor; the first mixing unit is provided with a first heating device; and the second mixing unit is provided with a second heating device. The conversion rate of methanol synthesized from coke oven gas can be improved.

The invention discloses an intermittent emission online control system of a low-temperature engine. The intermittent emission online control system comprises a control gas cylinder, an electric gas valve and a pre-cooling discharge valve which are sequentially connected through a pipeline, the precooling discharge valve is respectively communicated with the electric gas valve, the liquid oxygen main valve, the rocket liquid oxygen storage tank and a discharge pipeline through pipelines; the system further comprises a rocket-borne computer and a temperature sensor, and the temperature sensor is installed on a low-temperature pipeline connected with the engine. The temperature sensor is connected with the rocket-borne computer through a measuring cable; and the electric air valve is connected with the rocket-borne computer through a control cable. The invention further discloses a low-temperature engine intermittent emission online control method. According to the method, through real-time monitoring and dynamic optimization of the intermittent emission time sequence, the adaptability of an existing emission control method to different flight tasks is improved, the propellant emission consumption is reduced, and the success rate and economical efficiency of the rocket flight tasks are improved.

The utility model relates to the technical field of liquid oxygen preparation, and discloses an air filter for liquid oxygen preparation, which comprises a filter box, an air inlet hole is arranged in the middle of the right side of the filter box, the right side of the filter box is fixedly connected with two limiters, the adjacent sides of the two limiters are fixedly connected with vibrators, and the vibrators are fixedly connected with the air inlet hole. The left sides of the two limiters are fixedly connected with permanent magnets, the right side of the inner wall of the filter box is fixedly connected with a mounting frame, the left side of the inner wall of the mounting frame is fixedly connected with a plurality of springs, the right ends of the springs are fixedly connected with the same push plate, and the right side of the mounting frame is fixedly connected with a differential pressure sensor. After the main filter screen is damaged, the permanent magnet brings the main filter screen out of the air inlet hole, the vibrator separates the main filter screen, the square telescopic stop lever does not limit the standby filter screen, the spring pushes the standby filter screen into the sliding groove, the overall structure is simple, and air filtration is not affected.

The application discloses a TPMS structure micro-channel heat exchanger and a manufacturing method, and belongs to the field of structural design and manufacturing of rocket engine heat exchangers. The heat exchanger core is a plurality of spiral flow channel structures adopting TPMS. The inlet side of a liquid oxygen inlet and outlet collector is connected with the inlet of the core spiral flow channel through a liquid oxygen partition plate, and the outlet side of the liquid oxygen inlet and outlet collector is connected with the outlet of the core spiral flow channel. A fuel gas inlet pipeline is connected with the inlet of the core spiral flow channel through a fuel gas partition plate, and a fuel gas outlet pipeline is connected with the outlet of the core spiral flow channel. The liquid oxygen partition plate and the fuel gas partition plate are each provided with a plurality of through holes, the through holes correspond to the spiral flow channels in the core one by one, and each through hole is connected with the inlet of one spiral flow channel in the core. The application adopts the TPMS spiral flow channel structure to increase the internal heat exchange area of the heat exchanger and improve the heating efficiency of the heat exchanger on fuel in the working process of the engine.

The invention discloses a multifunctional air separation device for preparing liquid oxygen by liquefying air and nitrogen through a liquid oxygen self-pressurization evaporator and pouring liquid nitrogen backwards. Comprising an air filtering and compressing system, a pre-cooling system, an air purifying unit, a main heat exchanger, a liquid oxygen evaporator, a low-pressure expansion machine, a rectifying tower, a liquid air and liquid nitrogen subcooler, a high-purity oxygen tower, an argon extracting system, a medium-pressure nitrogen pipe network, a liquid oxygen pipe network, a nitrogen liquefier, a heat exchanger I and a gas-liquid separator, the output of the liquid oxygen evaporator is provided with a pressure oxygen pipeline, the pressure oxygen pipeline exchanges heat through the main heat exchanger and then is output and stored, the output of the bottom of the liquid oxygen evaporator is provided with a product liquid oxygen pipeline, the medium-pressure nitrogen pipe network is output to the nitrogen liquefier through the heat exchanger I, the input of the liquid oxygen pipe network is connected with the nitrogen liquefier, and the nitrogen liquefier is connected with the gas-liquid separator. The hydrogen-free argon production process and the oxygen external compression mode are adopted, the liquid oxygen self-pressurization function is achieved, air and nitrogen are liquefied, and the multifunctional characteristic is achieved.

The utility model discloses a natural gas melting furnace for melting aluminum ingots, and belongs to the technical field of metal melting equipment. The melting furnace comprises a box body and a furnace body, a liquid oxygen storage tank, a VPSA oxygen generator and a waste gas treatment box are integrated in the box body, and the liquid oxygen storage tank is connected with an oxygen supply pipeline through a vaporizer; the furnace body shell adopts a gradient refractory layer structure; the oxygen supply pipeline is of a Y-shaped parallel structure, a flame arrester and a dynamic pressure balance valve are arranged in the oxygen supply pipeline, and the oxygen flow is adjusted through linkage of a pressure sensor and a controller. A water-cooling observation window is arranged on the inner wall of the furnace body, and a thermal infrared imager is installed on the outer side to monitor the temperature of a molten pool and feed back and control combustion power. According to the utility model, efficient melting, safe oxygen supply and accurate temperature control are realized through structure optimization, and the device is suitable for continuous melting scenes of aluminum ingots.

The invention relates to a facility for cooling a flow of cryogenic fluid comprising a first circuit for fluid to be cooled, for example liquid nitrogen and / or liquid oxygen, a cryogenic refrigerator with a cycle circuit, at least one heat exchanger providing heat exchange with the first circuit for fluid to be cooled and the cycle circuit of the refrigerator, the facility comprising a second circuit for fluid to be liquefied, for example nitrogen gas and / or oxygen gas, the second fluid circuit being in heat exchange with the cycle circuit of the refrigerator in at least one heat exchanger of the facility, the facility being configured so as to be switchable into a first cooling operating mode, in which the facility cools the first fluid circuit in order to cool a liquefied fluid, preferably in order to generate a quasi-isothermal transformation of said fluid, and a second liquefaction operating mode, in which the facility cools the second fluid circuit with a view to liquefying a gas flow.

The invention discloses a liquid oxygen circulation supercooling system, and relates to the technical field of liquid oxygen storage management, liquid oxygen is stored in a liquid oxygen storage tank, the liquid oxygen enters a self-pressurization vaporizer from a vaporization liquid inlet pipe to be vaporized, oxygen generated by vaporization enters the liquid oxygen storage tank from a vaporization steam exhaust pipe, so that the pressure in the liquid oxygen storage tank is increased, and the liquid oxygen is discharged into a pipe needing to be cooled after being increased; the supercooling process is realized when the liquid oxygen in the pipe needing to be cooled flows through the cooler, and the liquid oxygen flows back to the liquid oxygen storage tank again after being supercooled; the device is applied before a launching task starts, liquid oxygen in the liquid oxygen storage tank is supercooled through continuous liquid oxygen circulating flow, compared with supercooling when liquid oxygen is injected into a rocket, supercooling is conducted in advance in the storage stage, injection peak flow does not need to be matched, the size of the device is smaller, and the manufacturing cost is lower.

The invention provides a zero-emission power circulation and fuel gas supply system and method for an LNG power-driven ship. The system comprises an internal combustion engine, a nitrogen membrane separation device, a heat regenerator, a water separator, a liquid CO2 storage tank, a liquid oxygen pump, an LNG pump, an LNG storage tank, a liquid oxygen storage tank, a CO2 condenser, a circulation compressor, a gas buffer tank, a CO2 separator, a first-stage water cooler and a second-stage intermediate heat exchanger. According to the internal combustion engine, LNG serves as fuel, an argon and oxygen mixture serves as a circulating working medium to replace air and natural gas to be combusted and push a piston to move, water vapor and gas CO2 in waste gas generated by the internal combustion engine are condensed and separated after being subjected to stepped cooling, and CO2 is liquefied through a circulating compressor and recycled to a liquid CO2 storage tank. According to the invention, argon is used for replacing air to realize waste heat recovery of the internal combustion engine, so that the energy efficiency of the system is improved, and meanwhile, CO2 capture and zero emission of gaseous pollutants are realized.

The utility model discloses a safety interlocking device for vaporization of low-temperature liquid oxygen, liquid nitrogen and liquid argon, and relates to the technical field of vaporization equipment. The device comprises a vaporizing tank, a DCS (Distributed Control System), a buffer pressure tank and an exhaust pipeline, wherein a material coil pipe and a steam coil pipe are arranged in the vaporizing tank; a water bath layer is arranged in the vaporizing tank; a steam inlet pipe connected with the steam coil pipe is arranged at the top of the vaporizing tank, a steam regulating valve is arranged on the steam inlet pipe, and a material inlet pipe connected with the material coil pipe is arranged at the bottom of the vaporizing tank. According to the utility model, through the design of the DCS control system, the steam regulating valve, the liquid pump, the liquid level sensor, the in-tank temperature sensor and the pipe body temperature sensor are connected with the DCS control system, when the temperature sensors detect temperature deviation, timely and safe interlocking control can be realized; safety accidents caused by pipeline leakage in the vaporization tank can be monitored, and the safety of vaporization equipment is greatly improved.

The utility model relates to the technical field of liquid oxygen bottles, in particular to a liquid oxygen bottle convenient to move, which comprises a liquid oxygen bottle, an anti-slip sleeve is slidably connected to the surface of the liquid oxygen bottle, a clamping seat is fixedly mounted on the surface of the anti-slip sleeve, a motor is fixedly mounted on the surface of the clamping seat, and an adjusting rod is fixedly mounted at the output end of the motor. By arranging the clamping seat, the motor, the adjusting rod, the lifting plate, the universal wheels, the clamping rod and the clamping plate, after the clamping seat is arranged on the surface of the liquid oxygen bottle in a sleeving mode and adjusted to a proper position, the motor drives the adjusting rod to rotate, the lifting plate is driven to descend slowly, the universal wheels make contact with the ground step by step, and the liquid oxygen bottle moves stably; and the fixed state and the moving mode can be adjusted at any time according to requirements, the manual carrying burden is effectively reduced, the adaptability and safety of the liquid oxygen bottle are improved, the liquid oxygen bottle is kept balanced in the adjusting process, and the use safety and reliability are further improved.

The utility model relates to liquid hydrogen liquid oxygen spacer heat conductivity coefficient appearance, including base, side plate and top plate, be provided with the base on the base, be provided with a plurality of heat insulating plates fixedly on the base, the heat insulating plate is fixed with the heat conduction plate, the top of base is provided with the lifting plate, the top plate's upper end is fixed with the cylinder, the cylinder has the expansion joint, and the expansion joint is fixedly connected with the upper surface of lifting plate, the lower surface of lifting plate is fixed with a plurality of heating plates, and one side of heating plate away from heat conduction plate and one side of heat conduction plate away from heating plate all are provided with temperature sensor, and the side of base is fixed with the reference plate, and the upper end surface of reference plate and the upper end surface of heat conduction plate are located same horizontal plane, and the side of lifting plate is fixed with the mounting plate, and the mounting plate is fixed with laser range finder, and laser range finder has laser emission end, and laser emission end is towards reference plate, and laser emission end and the lower surface of heating plate are located same horizontal plane, the utility model discloses that the accuracy of detection result has been improved, and saves time and labour, and the efficiency is high.

The invention relates to a multi-stage safety protection storage tank for liquid oxygen storage, which relates to the technical field of low-temperature liquid storage equipment, and comprises a storage tank main body, a main pressure release valve, an auxiliary pressure release valve, a discharge pipeline, a filling pipe and an access hole. The high-purity liquid oxygen storage device has the effect of ensuring that high-purity liquid oxygen is safely stored in a high-pressure, flammable and explosive environment. The storage tank body is arranged and comprises the outer wall and the inner container, the optical fiber sensor is arranged on the outer side of the inner container, the flow guide fins are arranged on the inner wall of the inner container, intelligent monitoring and static elimination can be conducted, the main pressure release valve and the auxiliary pressure release valve are arranged at the top end of the storage tank body, and graded rapid pressure release can be achieved; the outer side of the filling pipe is connected with a guide strip, an inspection mechanism, a movable sleeve, a rotating mechanism and other assemblies, under the mutual cooperation, the filter screen can be inspected and replaced under the conditions of no shutdown and no emptying of the storage tank, and the operation safety and efficiency are effectively improved.

The embodiment of the invention relates to the technical field of refrigeration, in particular to a low-temperature propellant storage system and method. The system is characterized in that a compressor compresses helium, a first part of compressed helium flows into a circulating refrigeration assembly, and a second part of compressed helium flows into a heating assembly; the circulating refrigeration assembly is used for cooling the first part of helium, liquid hydrogen stored in the liquid hydrogen storage tank and liquid oxygen stored in the liquid oxygen storage tank are cooled through the cooled first part of helium, and the cooled first part of helium flows back to the compressor; and the heating assembly is used for heating liquid oxygen flowing out of the liquid oxygen storage tank and liquid hydrogen flowing out of the liquid hydrogen storage tank through the second part of helium to obtain gaseous oxygen and gaseous hydrogen, the gaseous oxygen and the gaseous hydrogen are conveyed to the engine, and the second part of helium flows back to the compressor after heating treatment. According to the technical scheme, high-quality cooling capacity in the storage box can be effectively utilized, and the circulating refrigeration efficiency is improved.

The invention relates to the technical field of industrial monitoring, and discloses a liquid oxygen flow wireless monitoring system based on 5G communication. According to the system, liquid oxygen filling flow, density and temperature data are collected in real time through the Coriolis mass flow meter and transmitted to the 5G wireless module through the RS485 interface, and low-delay (smaller than or equal to 100 ms) and high-reliability remote data transmission is achieved through the 5G network. A 128-bit AES encryption algorithm is adopted in the data transmission process, an RBAC authority management terminal platform is combined, and data safety and multi-user cooperative operation are ensured. The system supports an SCADA (supervisory control and data acquisition) framework, can perform closed-loop control on single-hole filling quality, and generates a real-time trend curve and a historical report through an Internet of Things platform. Experiments show that the flow measurement error of the system is smaller than or equal to + / -0.2% in a sandstone mine blasting scene, the data integrity rate reaches 99.99%, and the intelligent monitoring level of the liquid oxygen filling process is remarkably improved.

The embodiment of the invention discloses a liquid feeding air separation device which comprises a rectifying tower, a liquid feeding device, a liquid feeding device, a liquid feeding device, a liquid feeding device and a liquid discharging device, and the middle of the rectifying tower is provided with a liquid air feeding port; the condensing evaporator is arranged at the bottom of the rectifying tower; wherein liquid air enters the rectifying tower from the liquid air feed port to be rectified, liquid oxygen is obtained at the tower bottom, nitrogen is led out from the tower top of the rectifying tower and led into the condensation evaporator after being pressurized and cooled, liquid nitrogen flowing out of the condensation evaporator is divided into two strands, one strand serves as reflux liquid of the rectifying tower, and the other strand is led out. According to the technical scheme, liquid air is used as feed, nitrogen at the top of the tower is pressurized and cooled and then is introduced into the condensation evaporator, then heat exchange is carried out on the nitrogen and liquid oxygen at the bottom of the rectifying tower, and therefore rectification is achieved, and the air separation equipment with the liquid air as the raw material is provided.

The invention discloses a liquid oxygen rock breaking shock wave front edge form testing device which comprises a test bed, a cartridge bag fixing seat is fixedly connected to the middle of the test bed, a test cartridge bag is placed on the cartridge bag fixing seat, a first closed box body is fixedly connected to one side of the test bed, and a second closed box body is symmetrically and fixedly connected to the other side of the test bed. Optical guide rails are arranged in the first closed box body and the second closed box body, the optical guide rail in the first closed box body is in sliding connection with a first optical element arranged along an optical path, and the optical guide rail in the second closed box body is in sliding connection with a second optical element; a high-speed camera is arranged at the end, away from the medicine bag fixing base, in the second closed box. The invention further discloses a liquid oxygen rock breaking shock wave front edge form testing method. According to the testing device and the testing method disclosed by the invention, the problems that the physical and chemical change mechanism of the existing liquid oxygen expansion rock breaking is not clear and the comparative research on the aspects of the rock breaking effect and the dynamic response characteristic compared with the traditional explosive blasting is relatively deficient are solved.

The utility model relates to a nitrogen recycling device in a krypton-xenon refining system. Comprising a krypton and xenon feed gas pipeline, the krypton and xenon feed gas pipeline is connected with a light component removal rectification part through a water removal unit, a tower kettle liquid outlet pipeline of the light component removal rectification part is connected with a krypton and xenon separation tower, the light component removal rectification part comprises a light component removal rectification tower, and a gas phase outlet of the light component removal rectification tower is connected with a condenser tube pass. A tube pass outlet of the condenser is respectively connected with a reflux inlet of the light component removal rectifying tower and a liquid oxygen storage tank; the moisture removal unit comprises a first channel of a first heat exchanger, and the first channel of the first heat exchanger is connected with a light component removal rectifying tower through an adsorber and a first channel of a second heat exchanger; the liquid nitrogen storage tank is connected with the regenerated gas buffer tank for the adsorber through a shell pass of the condenser and a second channel of the second heat exchanger; an outlet of the regenerated gas buffer tank for the adsorber is connected with the adsorber; the device is simple in structure and reasonable in design, and can realize long-time stable operation of a krypton and xenon refining system while realizing effective utilization of nitrogen cooling capacity and self.

The utility model relates to the technical field of liquid oxygen filling, and discloses a steel cylinder clamping device for low-temperature liquid oxygen filling, which is characterized in that a limiting mechanism consists of a first straight gear, a motor, a second straight gear, a rotating shaft, a third straight gear, a first bevel gear, a threaded rod, a second bevel gear, a threaded sleeve, a connecting rod and a clamping plate, the first straight gear is rotationally installed in the base, the motor is fixedly installed in the base, and the second straight gear is fixedly installed on an output shaft of the motor. According to the steel cylinder clamping device for low-temperature liquid oxygen filling, a motor is started to drive a second straight gear to rotate, under the action of a first straight gear and a third straight gear, a rotating shaft can rotate, under the action of a first bevel gear and a second bevel gear, a threaded rod can rotate, a threaded sleeve drives a connecting rod to move, and the connecting rod can rotate; and steel cylinders of different specifications can be clamped and fixed through the clamping plates, so that the steel cylinders are effectively prevented from sliding and shifting in the carrying or storing process.

The purpose of this invention is to propose an oxygen depressurization explosion-proof electrostatic vacuum noise silencing device, belonging to the field of safe handling of flammable and explosive industrial gases. The device includes a vertical cylindrical body, a bottom air inlet, a top exhaust outlet, supporting legs, and inside the cylinder, a bottom flame arrester, a multi-stage pressure reduction and deceleration assembly, an electrostatic elimination sound-absorbing layer, and a top flame arrester. Through multi-stage U-shaped microporous baffles, progressive pressure reduction and deceleration are achieved; the metal wire sound-absorbing layer eliminates static electricity and absorbs noise; and the upper and lower double-layer flame arresters block the backfire path, completely solving the problems of electrostatic explosion, backfire, and noise pollution during oxygen depressurization. This invention is suitable for high-risk scenarios such as liquid oxygen stations, ensuring the safe production of flammable and explosive chemical facilities, avoiding personal injury and property damage, while meeting environmental protection and noise reduction requirements.

The invention discloses a detection device for analyzing transient phase change expansion gas of liquid oxygen, and relates to the technical field of rock crushing, the detection device comprises a box body, a cover plate, anti-explosion channel steel and a sensor; the cover plate is arranged at the top of the box body, positive and negative electrodes and a liquid filling pipe are arranged on the cover plate, the positive and negative electrodes are used for detonating experimental articles by an external power supply, and the liquid filling pipe is used for filling liquid into the box body; the explosion-proof channel steel is connected to the box body in a sliding mode, a guide rail used for guiding the explosion-proof channel steel is arranged in the box body, the explosion-proof channel steel and one side wall of the box body form a protection cavity, closing or opening of the protection cavity is achieved through sliding of the explosion-proof channel steel, and the sensor is installed in the protection cavity; according to the detection device for analyzing the liquid oxygen transient phase change expansion gas, related data such as components and content of the expansion gas after liquid oxygen transient phase change expansion can be detected in real time through the sensor, and detection of the components, the content and the diffusion rule of the liquid oxygen transient phase change expansion gas is achieved.

The invention relates to the technical field of smelting equipment, in particular to a liquid oxygen vaporization device, a medium-free oxygen supply system and side blown converter equipment, the liquid oxygen vaporization device comprises a supporting frame, a first vaporization assembly and a second vaporization assembly, the first vaporization assembly and the second vaporization assembly are arranged on the supporting frame, and the first vaporization assembly is provided with a first liquid inlet end and a first gas outlet end; the second vaporization assembly is provided with a second liquid inlet end and a second gas outlet end, and the first liquid inlet end is communicated with the second liquid inlet end; the airflow heat separation assembly comprises a combined pipe section and an airflow spiral piece arranged in the combined pipe section, the hot end of the combined pipe section is connected with one end of the heating pipe, the cold end of the combined pipe section communicates with the other end of the heating pipe and the second air outlet end, and a branch pipe communicating with the first air outlet end is arranged on the side wall of the combined pipe section. The air flow spiral piece is used for generating high-temperature air flow flowing into the hot end and low-temperature air flow flowing into the cold end, stable oxygen supply and pressure requirements under special environments such as power failure and low temperature are met, and safe shutdown of the side-blown converter is guaranteed.

This invention relates to the field of new energy and discloses a highly selective photocatalytic method for producing acetone from methane. The method includes: placing a transparent substrate coated with a photocatalyst in a photocatalytic reactor, adding liquid water, introducing methane gas to purge air, sealing the photocatalytic reactor, and conducting a gas-solid two-phase photocatalytic reaction under light irradiation and heating at 50-100°C to generate a liquid oxygen-containing organic compound, primarily acetone. The photocatalyst is BiVO4, ZnO, or a modified photocatalyst based on morphology control, surface modification, semiconductor composite, or elemental doping of BiVO4 or ZnO. This invention uses methane and water as raw materials, reacting with a photocatalyst in a gas-solid two-phase reaction to produce a liquid oxygen-containing organic compound, primarily acetone, with high acetone yield and selectivity. This invention has advantages such as low requirements for the reaction environment, simple and environmentally friendly process, and low cost.