1000 results about "Liquid oxygen" patented technology

The gradually-expanded printed circuit board type heat exchange inner core comprises a cover plate, a bottom plate, a cold side plate layer and a hot side plate layer, a cold side gradually-expanded channel is of a flow channel structure with the width gradually expanded, and the sectional area of a flow channel dynamically adapts to gas-liquid phase change and volume change. And pressure drop fluctuation and bubble aggregation caused by gas phase expansion are reduced, the shunt channels and the divergent channels are arranged in parallel, an inner wall porous structure is combined, medium distribution uniformity is optimized through graded distribution and surface wettability enhancement, and the flow stability is remarkably improved. The turbulent flow ribs are arranged in the heat exchange channel on the heat side, combination of heterogeneous working media such as supercritical CO2-water and liquid hydrogen-liquid oxygen is supported by destroying a heat boundary layer, inducing turbulent flow and strengthening convective heat exchange and phase change heat transfer, the heat exchanger can improve the heat exchange efficiency while reducing pressure drop, compactness, reliability and wide working condition adaptability are considered, and the heat exchange efficiency is improved. Two-phase flow optimization and efficient heat exchange are achieved, and the extreme heat exchange requirements in the fields of aerospace, new energy and the like are met.

The invention discloses an anti-static flexible fracturing rock breaking pipe based on a conductive oxygenating conduit, which comprises a flexible outer sleeve film with two closed ends and filled with an adsorbing material combustion agent, and further comprises the conductive oxygenating conduit penetrating into the flexible outer sleeve film from the top of the flexible outer sleeve film, an excitation wire and an exhaust pipe, the excitation wire is connected with an electric ignition device, and the electric ignition device is positioned in the flexible outer sleeve film and is in contact with the adsorption material combustion agent; the outer wall of the conductive oxygenation conduit is connected with a conductive unit. The invention further discloses a rock breaking method using the anti-static flexible fracturing rock breaking pipe based on the conductive oxygenating guide pipe, the conductive unit is arranged on the conductive oxygenating guide pipe and makes contact with the ground for conduction, static electricity generated in the filling process of liquid oxygen or pressurized high-purity liquid oxygen can be guided out and eliminated, and the anti-static flexible fracturing rock breaking pipe based on the conductive oxygenating guide pipe can be used for breaking rocks. Static electricity generated in the filling process of liquid oxygen or high-purity liquid oxygen with pressure can be conducted away and eliminated more efficiently, timely and continuously, and the risk of safety accidents caused by the static electricity is greatly reduced.

The invention provides a liquid oxygen methane engine test bed composed of a multifunctional test system. The test bed comprises a gas path system, a liquid path system and a test station. Wherein the gas path system and the liquid path system are connected through a pipeline for gas supply, and the liquid path system is connected with the test run station and used for providing liquid fuel needed by testing for the test run station. The liquid path system comprises a low-pressure liquid path module and a high-pressure liquid path module. And the low-pressure liquid path module and the high-pressure liquid path module are respectively connected with a test run station. The test bed is composed of a set of gas path system, two sets of liquid path systems and three test stations. The two sets of liquid path systems jointly adopt one set of gas path system for gas supply, so that medium conveying can be carried out on the three test run stations according to requirements, the test run platform can meet the gas distribution requirements of engines of different models, meanwhile, the resource sharing of test equipment is improved, the total cost of equipment construction and maintenance is greatly reduced, and the working efficiency is improved. And the engine testing efficiency is improved.

An electric pump pressure type liquid oxygen methane rocket main and auxiliary power integrated system adopts an electric pump to pressurize a low-pressure propellant in a rocket storage tank, the pressurized propellant can be controlled to enter an attitude and orbit control engine or return to the rocket storage tank through reversing of a reversing valve, and if the reversing valve continuously supplies the propellant into the attitude and orbit control engine, the propellant can enter the attitude and orbit control engine; continuous and stable work of the attitude and orbit control engine can be realized; if the reversing valve supplies propellants into the attitude and orbit control engine and then immediately switches to the rocket storage tank, pulse work of the attitude and orbit control engine can be achieved through circulation. The reversing valve can keep the electric pump in a normal circulation state at the downstream moment, and the electric pump can work normally and stably no matter whether the attitude and orbit control engine works stably or in a pulse mode. The cavitation pipe is installed in front of the reversing valve, when the attitude and orbit control engine works in a pulse mode, the rotating speed and the power of the electric pump are kept unchanged, the pressure and the flow behind the pump can be constant, the flow entering the attitude and orbit control engine is constant, and it can be guaranteed that thrust generated by the attitude and orbit control engine in each pulse work is constant.

The invention discloses process equipment and method for high-temperature nitrogen-free sintered magnesia, and belongs to the technical field of high-temperature combustion of industrial kilns, and the process equipment is composed of a calcining kiln, a bag-type dust collector, an induced draft fan, a gas cooler, a gas mixer, a liquid oxygen storage tank, a gasifier, PLC control equipment and a high-pressure fan. The oxygen content in the mixed gas is controlled to be 21-25%, artificial nitrogen-free combustion-supporting air is obtained to replace air to complete sintering of magnesia, air is not used, 79% of nitrogen components in the air are prevented from entering a combustion system, discharged tail gas is reduced by more than 2 / 3, heat loss in smoke is reduced, nitrogen oxide is not generated, catalytic reduction denitration is not needed, and the production cost is reduced. As the flue gas does not need to be heated, the energy consumption cost is saved. The concentration of carbon dioxide in discharged flue gas can reach more than 90%, liquid carbon dioxide is prepared through pressurization, and waste is turned into wealth.

The invention discloses an alkaline electrolysis water hydrogen production system and method capable of deeply reducing the hydrogen content in oxygen in multiple ways, a hydrogen side flash tank is arranged in the alkaline electrolysis water hydrogen production system, and dissolved hydrogen deep removal is carried out on hydrogen side alkali liquor passing through a gas-liquid separator through the hydrogen side flash tank; a mixed alkali liquor flash tank is arranged in an alkaline electrolysis water hydrogen production system, and deep removal of dissolved oxygen and dissolved hydrogen is carried out on mixed alkali liquor through the mixed alkali liquor flash tank; a hydrogen side pressure adjusting part capable of adjusting the pressure of a cathode chamber is arranged in a hydrogen side gas-liquid separator system, and an oxygen side pressure adjusting part capable of adjusting the pressure of an anode chamber is arranged in an oxygen side gas-liquid separation system, so that the pressure of the anode chamber of the alkaline electrolytic cell is higher than that of the cathode chamber, and the amount of hydrogen entering the anode chamber from the cathode chamber through a diaphragm is reduced; the concentration of hydrogen in oxygen in the water electrolysis hydrogen production system is reduced, and the safety of the system is improved.

The invention relates to a novel liquid rocket pressurization system combining self-generated pressurization and gas cylinder heating pressurization. The novel liquid rocket pressurization system comprises a liquid oxygen storage tank, a kerosene storage tank, a self-generated pressurization pipeline, a gas cylinder heating pressurization pipeline, a first heater and a third heater. The self-generating pressurizing pipeline is communicated with the liquid oxygen storage tank and is communicated with a thrust chamber head oxygen head cavity of the first engine, and liquid oxygen is led out of the thrust chamber head oxygen head cavity of the first engine, then is subjected to heat exchange with turbine waste gas through the first heater and then is conveyed to the liquid oxygen storage tank; and the gas cylinder heating and pressurizing pipeline is communicated with the kerosene storage tank, and pressurized gas exchanges heat with waste gas of the turbine through the third heater and then is conveyed to the kerosene storage tank. According to the application, self-pressurization of the low-temperature liquid oxygen storage tank is realized, and heating and pressurization of the kerosene storage tank are also realized, so that the pressurization efficiency of the kerosene storage tank is greatly improved.

The invention discloses a hydrogen low-temperature precooling device and method with oxygen liquefaction, relates to the technical field of low-temperature refrigeration and hydrogen energy liquefaction, and is particularly suitable for cooperative utilization of a hydrogen-oxygen co-production system in green hydrogen production. The device comprises a hydrogen pre-cooling cold box, a liquid oxygen cold box, a mixed refrigerant compression and heat exchange system, a nitrogen circulating refrigeration system and a trace oxygen analyzer arranged in a nitrogen loop. The raw material hydrogen is subjected to purification, precooling, adsorption and ortho-parahydrogen conversion treatment to obtain liquefiable precooled hydrogen; a liquid oxygen product is output after raw material oxygen is purified and liquefied through heat exchange. According to the device, cryogenic heat exchange is achieved through two-stage circulation of mixed refrigerants and nitrogen, a multi-temperature-zone segmented heat exchange network is constructed through multiple separation tanks and a throttling path, and the refrigeration efficiency and the heat recovery capacity are both considered. And liquid oxygen cooling can be dynamically regulated and controlled through a temperature-regulating nitrogen path to adapt to various working conditions of the electrolytic cell. The device is compact in structure, high in safety, excellent in energy efficiency and suitable for the hydrogen-oxygen synergistic liquefaction treatment scene in a water electrolysis hydrogen production device.

A propulsion system for an air vehicle includes a fan system that includes a fan that is coupled to a fan drive electric motor for generating a fan discharge airflow, an augmentor where fuel is mixed with a portion of the fan discharge airflow to generate a propulsive flow in a first operating configuration, a bypass duct for directing the fan discharge airflow into the augmentor, a duct blocker for selectively closing the bypass duct to the fan discharge airflow, a liquid oxygen system that is configured to inject liquid oxygen into the augmentor to mix with the fuel when the fan discharge airflow is closed by the duct blocker, the mixture of fuel flow and liquid oxygen generates the propulsive flow in a second operating configuration, and an electric power generation system is coupled to drive the fan drive electric motor.

The invention provides an injector based on a liquid oxygen methane two-component propellant and an attitude control engine, and the injector comprises an injector body, a centrifugal nozzle assembly and a spark plug; the centrifugal nozzle assembly is arranged on the injector body, and the injector body is provided with a liquid collecting cavity; a propellant in the storage box is guided to the liquid collecting cavity and is sprayed to the spraying pipe through the centrifugal nozzle assembly; the sparking plug is arranged on the injector body, and an ignition part of the sparking plug is arranged close to an outlet of the centrifugal nozzle assembly so as to ignite the propellant sprayed into the spray pipe by the centrifugal nozzle assembly. The injector is more compact in structure, and the working reliability of the injector can be improved.

The utility model provides a methane full-supercooling filling system in a liquid oxygen methane rocket filling system. The methane full-supercooling filling system comprises a liquid nitrogen container, the first heat exchanger is connected with a first liquid phase outlet of the liquid nitrogen container; an outlet of the first heat exchanger is connected with a gas phase inlet of the liquid nitrogen container; the first heat exchange device is connected with a second liquid phase outlet of the liquid nitrogen container; a methane storage tank A; the second heat exchanger is connected with a first liquid phase outlet of the methane storage tank A; an outlet of the second heat exchanger is connected with a gas phase inlet of the methane storage tank A; the first heat exchange device is connected with a second liquid phase inlet / outlet of the methane storage tank A; the methane storage tank B is connected with the first heat exchange device; and the methane adding and storing device is connected with the methane storage tank B. In a liquid oxygen methane rocket filling system, the filling system is adopted, large-flow full supercooling of methane can be effectively achieved in a backflow cooling mode, and the construction cost of the methane filling system is reduced in the backflow cooling mode.

The embodiment of the invention provides a liquid nitrogen vaporization pressurization system and a liquid rocket. The liquid nitrogen vaporization pressurization system comprises a liquid oxygen tank, a fuel tank, a liquid nitrogen tank, a liquid nitrogen pump, a cavitation pipe and a warmer assembly. The liquid oxygen tank is used for storing liquid oxygen, the fuel tank is used for storing fuel, the liquid nitrogen tank is used for storing liquid nitrogen, the liquid nitrogen tank is arranged in the liquid oxygen tank, the fuel tank is arranged on the side, close to an engine, of the liquid oxygen tank, the liquid nitrogen pump is used for increasing the output pressure of the liquid nitrogen, the cavitation pipe is used for stabilizing the flow of the liquid nitrogen, and the heater assembly is used for vaporizing and heating the liquid nitrogen into high-temperature nitrogen. A liquid nitrogen conveying pipe is arranged at the bottom of the liquid nitrogen tank, the liquid nitrogen pump is arranged on the liquid nitrogen conveying pipe, the end, away from the liquid nitrogen pump, of the liquid nitrogen conveying pipe is connected with an inlet of the warmer assembly, and the liquid oxygen tank air pillow, the fuel tank air pillow and the liquid nitrogen tank air pillow are connected with an outlet of the warmer assembly through pipelines. According to the liquid nitrogen vaporization pressurization system and the liquid rocket provided by the embodiment of the invention, the cost and weight of the pressurization system can be effectively reduced.

The invention discloses a liquid oxygen methane rocket engine fault prediction method and system based on an ARMA model, and the method comprises the steps: constructing a modularized simulation model of a liquid oxygen methane rocket engine, injecting fault factors to simulate typical faults (such as methane pump cavitation, turbine blade ablation and the like), and obtaining normal and fault data containing Gaussian noise; carrying out time sequence modeling on the six key parameters by adopting an ARMA (Autoregressive Moving Average Model), and optimizing model parameters through ACF / PACF order determination and AIC criteria; establishing a self-adaptive residual threshold formula (threshold = residual mean + / -2 times of standard deviation), and realizing early warning of the fault by combining a judgment criterion that the threshold is continuously exceeded for three times and three parameters cooperatively give an alarm; experiments show that the alarm time is 0.1-0.13 seconds earlier than that of a traditional red line threshold method, the false alarm rate is reduced from 18.7% to 0.3%, and the spaceflight-level real-time performance and reliability requirements are met; the method does not need a large number of fault samples, is high in anti-interference capability, and is suitable for online health monitoring of reusable rocket engines.

The invention relates to the technical field of low-temperature propellant filling, in particular to a liquid oxygen propellant filling system and a pre-cooling pump starting method thereof, and provides the liquid oxygen propellant filling system which cancels a filling bypass, reduces the bypass leakage risk, enables the whole filling system to be more simplified, and improves the filling efficiency. The invention further provides a pre-cooling pump starting method of the liquid oxygen propellant filling system. The pre-cooling pump starting method comprises the following steps that the pipeline is pre-cooled, the filling valve at the liquid oxygen storage tank end is opened, the filling valve at the rocket liquid oxygen storage tank end is closed, the exhaust valve is opened, liquid oxygen flows through the pipeline, and the pipeline is pre-cooled. Pre-cooling the storage tank, namely pre-cooling the storage tank after the pipeline is pre-cooled; starting the pump for pre-cooling, starting the liquid oxygen filling pump at low frequency, and gradually increasing the frequency of the liquid oxygen filling pump. Storage tank filling is carried out through the high-position pump and the low-position pump, liquid oxygen does not need to be extruded into the storage tank through bypass pressure increasing, the precooling flow process does not need to be interrupted, procedure conversion of liquid oxygen precooling and large-flow filling is not needed, the operation difficulty is reduced, and the filling time is shortened.

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 relates to a novel cold force circulation and power generation system, which adopts an air pressure / hydraulic pressure combined high-pressure air transmission technology to realize cold force power generation (or cold force temperature difference power generation) and thermal power generation of liquid air cold energy, and has better energy storage and energy release power generation functions of photovoltaic power, wind power or peak valley power shifting and filling. The energy-saving effect is good, noise is low, liquid oxygen, liquid nitrogen or high-purity nitrogen can be produced as byproducts, and the expected social and economic benefits are obvious.

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 invention relates to a method for adjusting raw material flow in a poor krypton tower by using a crude argon condenser, which belongs to the technical field of flow measurement, and comprises the following steps of: 1) filling the crude argon condenser with oxygen and nitrogen, adjusting the temperature in the crude argon condenser, and reducing the temperature in the crude argon condenser according to a mode of 1 DEG C / s; (2) in the process that the temperature in the crude argon condenser is reduced, poor krypton tower raw materials are input into the crude argon condenser, and the flow of the poor krypton tower raw materials added into the crude argon condenser is adjusted; (3) after oxygen and nitrogen in the crude argon condenser are liquid oxygen and liquid nitrogen respectively, input of the poor krypton tower raw materials is stopped, and the temperature in the crude argon condenser is kept; (4) the temperature in the crude argon condenser is adjusted, and the liquid oxygen and the liquid nitrogen are kept in the liquid state; the method has the beneficial effects that in the process of reducing the temperature in the crude argon condenser, the poor krypton tower raw material is input into the crude argon condenser, and the flow of the poor krypton tower raw material is adjusted by adopting a temperature mass metering method.

The invention provides a distributed liquid oxygen source oxygen supply system, and belongs to the technical field of oxygen supply. The distributed liquid oxygen source oxygen supply system comprises an oxygen source box body and an oxygen uptake user terminal, wherein two Dewar flasks filled with liquid oxygen, an instrument and pipeline box, a vaporizer and two weighbridges are arranged in the oxygen source box body; the two Dewar flasks are connected with the vaporizer through the instrument and a liquid oxygen inlet and outlet valve pipeline in the pipeline box, the vaporizer is connected with the outdoor pipeline through the instrument and a pressure reducer pipeline in the pipeline box, and the outdoor pipeline is connected to each oxygen inhalation user terminal. A sensor sensing technology, an electronic control technology, an internet technology and a liquid oxygen gasification, pressure reduction and conveying technology are combined, and a brand new distributed liquid oxygen source oxygen supply system is provided, so that resident families, hotels, hotels, office facilities or other people needing oxygen in plateau oxygen-deficient areas can supply oxygen to the oxygen-deficient areas. And medical-grade oxygen with low cost and high quality can be continuously used for a long time.

The invention provides a rocket tank bursting test control system and control method. The control system comprises a water injection and supplement control device, an oxygen tank pressurization control device and a combustion tank pressurization control device. The rocket stainless steel storage tank is of a common-bottom structure, and an oxygen tank on the upper portion of the storage tank is used for being filled with liquid oxygen propellants. The combustion box at the lower part of the storage box is used for filling a liquid methane propellant; the oxygen box and the combustion box are both connected with the water supply storage box; the water injection and supplement control device is used for controlling the water supply centrifugal pump to inject water into the water supply storage tank, the oxygen tank and the combustion tank; the oxygen tank pressurization control device is used for controlling the oxygen tank pressurization constant-pressure pump to inject water into the oxygen tank and pressurize the oxygen tank step by step after taking water from the water supply storage tank; the combustion box pressurization control device is used for controlling the combustion box pressurization constant-pressure pump to take water from the water supply storage box and then conduct water injection step-by-step pressurization on the combustion box. Therefore, the pressurized internal pressure bursting test of the stainless steel storage tank of the rocket is completed. According to the invention, on-line automatic control can be carried out on the bursting test, and the test working efficiency and the test control accuracy can be improved.

The invention provides a gas phase change rock breaking device and method based on an aluminothermic reaction, and belongs to the technical field of rock blasting. The rock breaking device comprises a graphite excitation pipe, a liquefied air bag and a sealing cover, the excitation pipe is filled with thermite, and thermite reaction can be carried out to release heat; the liquefied air bag is hermetically sleeved outside the excitation tube, is filled with liquid oxygen or liquid nitrogen and is changed into gas under the action of heat released by the excitation tube, and rock mass fracture is realized by volume expansion. By arranging a multi-section excitation pipe serial connection structure, adopting the industrial graphite excitation pipe, designing a liquid oxygen or liquid nitrogen double-medium system and using the polyethylene degradable material bag body, the safety, the economical efficiency and the environmental adaptability of open-air rock mining are remarkably improved.

A power unit for power generation in aerospace and other systems comprises a power generation device 101, such as a fuel cell, gas turbine or internal combustion engine, coupled to a liquid hydrogen reservoir 102 via a first conduit 105 and to an oxygen supply 108 via a second conduit 107. A heat exchanger 106 is provided between the two conduits, and a separator 109 is present in the second conduit for separation and removal of gas, especially gaseous nitrogen, from liquid oxygen. The heat exchanger exchanges heat between hydrogen flowing in the first conduit and oxygen flowing in the second conduit, which cools the oxygen while heating the hydrogen. The separator may be provided with a third conduit 110 for directing gas removed from the second conduit to be vented, or to an auxiliary unit, e.g. a fire prevention device when the gas is nitrogen, a cooling device for cooling an electric component such as an electric motor (301, figure 3) or a de-icing system.

The invention provides a device and method for exciting liquid oxygen phase change blasting through combustion of a non-static flammable adsorbing material, the device comprises a flexible pipe cavity filled with liquid oxygen, a liquid filling pipe, a flammable medium and a grounding wire are arranged in the flexible pipe cavity, and the flexible pipe cavity is composed of a base material layer, a heat insulation layer and an anti-static layer. Static electricity is eliminated by arranging the grounding wire and the anti-static layer; the heat insulation layer is arranged to reduce heat loss; by using the combustible medium prepared from agricultural and forestry wastes, the cost is reduced, and resource reutilization is realized; and through the special design of the liquid filling pipe, the combustible medium quickly and uniformly absorbs liquid oxygen, and the rock breaking efficiency is improved. The problems of electrostatic potential safety hazards, poor heat insulation performance and high combustible medium cost in an existing liquid oxygen blasting technology are solved, and the method has the comprehensive advantages of being safe, efficient, economical and environmentally friendly.

The invention relates to the technical field of fry transfer, in particular to a land-sea relay high-efficiency low-stress transfer method for mackerel fry. The method comprises the steps of transferring from a nursery pond to a fry collecting pond, intelligently counting fries and transferring in water, conveying the fries to a fry conveying box, conveying the fries to a transport vehicle on a land track, transferring the fries to the transport vehicle through a crane and transferring the fries to a wharf and sea, and finally putting the fries into a net cage through a transport ship. In the transfer process, a buffer discharge pipeline and an underwater conveying system are utilized, and independent circulating water and liquid oxygen supply systems of an intelligent counting machine and a fry conveying box are combined, so that the fries are always in a stable water environment, mechanical damage can be avoided, stress caused by sudden change of the environment is reduced, meanwhile, all links are efficiently and cooperatively operated, and the transfer efficiency of the fries is improved. The problem of high death rate caused by mechanical injury, environmental mutation and stress reaction in the transfer process of the fries is fundamentally solved, so that the survival rate of the fries is increased, and the breeding production is smoothly carried out.

The utility model provides a liquid oxygen deep supercooling system, which relates to the field of low-temperature filling of carrier rockets, and is characterized in that a liquid oxygen storage tank stores liquid oxygen, and a liquid nitrogen storage tank stores liquid nitrogen; a tube pass inside the subcooler is communicated with the liquid oxygen storage tank, and a shell pass outside the subcooler is communicated with the liquid nitrogen storage tank; the supplied liquid oxygen and the liquid nitrogen are subjected to heat exchange in the subcooler, and the liquid oxygen is cooled by the liquid nitrogen; in the process, the vacuum generator is used for vacuumizing the shell pass, the temperature of the liquid nitrogen serving as the refrigerant is further reduced under the condition that the air pressure is reduced, the liquid nitrogen in the shell pass is further cooled, the temperature of the liquid oxygen is further reduced, the super-cooled liquid oxygen is prepared, the super-cooled liquid oxygen can be filled into the rocket, and the overall performance of the rocket is further improved.

The present invention discloses a cryogenic air separation device for gas separation and purification, and specifically relates to the field of cryogenic air separation technology, including a device housing, a control box is fixedly installed on the middle side of the front surface of the device housing, a rectangular groove is provided in the inner cavity of the device housing, an air inlet pipe is fixedly connected to the lower right side of the outer surface of the device housing and extends to the inner surface of the rectangular groove, and a refrigeration liquefaction mechanism is fixedly installed on the upper inner surface of the device housing. The cryogenic air separation device for gas separation and purification described in the present invention can be provided with a partitioning component, so that oxygen and nitrogen in the air can be subjected to refrigeration partition extraction operations according to their different boiling points, so that the extracted liquid oxygen and liquid nitrogen will not mix in the inner cavity of the device housing, and the extraction liquid is prevented from containing both nitrogen and oxygen, thereby effectively improving the purity of liquid nitrogen and liquid oxygen, and facilitating the extraction of liquid nitrogen and liquid oxygen.

The utility model discloses a pipeline anti-freezing and anti-blocking device for a device for obtaining high-purity krypton and xenon gas from liquid oxygen, and belongs to the technical field of gas purification. The anti-freezing and anti-blocking device comprises an electric tracing band, two groups of fixing frames and two groups of fixing mechanisms. The electric tracing band is wound and attached to the periphery of the pipeline through the aluminum foil band, when production is finished or paused, the pipeline is heated through the electric tracing band, and the phenomenon that the interior of the pipeline is frozen and blocked when flow is low is prevented. The two fixing frames are detachably and fixedly arranged at the two ends of the pipeline. The fixing mechanisms are detachably and oppositely installed between the two sets of fixing frames, and the fixing mechanisms are used for fixing the electric tracing band between the two sets of fixing frames, so that the electric tracing band does not loosen or fall off in the using process, and the optimal heating effect is achieved.

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.

The utility model belongs to the technical field of gasification furnaces, and provides a gasification furnace with a liquid oxygen pump, which comprises a furnace body, the furnace body is communicated with a raw gas outlet pipe, the end part of the raw gas outlet pipe, which is positioned in the furnace body, is rotatably provided with a coaxial outlet cover, and the furnace body is fixedly provided with a high-pressure water pump. The high-pressure water pump is communicated with a cleaning pipeline extending into the outlet cover, the end of the cleaning pipeline is communicated with a flushing nozzle for flushing the inner wall of the outlet cover, and a rotating shaft driven by water flow is rotationally installed at the end of the cleaning pipeline. The technical problems that in the prior art, cleaning dead corners exist, dust residues exist in a conical connector, and the cleaning effect is reduced are solved. Compared with the prior art, the cleaning device has the advantages that water flow can be sprayed to all positions on the inner wall of the outlet cover through the flushing spray head, dust on the inner wall of the outlet cover is guaranteed to be completely cleaned, dust residues in the outlet cover are avoided, and the cleaning effect of the outlet cover is improved.