706 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 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.

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 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 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 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.

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 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 present disclosure relates to a liquid oxygen vent silencer used in an oxygen production process implemented so as to eliminate potentially explosive elements, and the vent silencer is manufactured using copper plates and stainless (SUS) having no risk of explosions to minimize an edge that collide with oxygen gas, and includes a silencer body that receives cryogenic liquid gas and moves an internal space up and down to reduce noise; and a body support that is installed along an outside of the silencer body and supports the silencer body by raising or lowering the silencer body from a ground.

The invention discloses a liquid oxygen rock breaking system and method, the system comprises an oxygenation system, a gas distribution system, a fracturing rock breaking pipe system, an excitation system and an electrostatic prevention and removal grounding system, a fracturing rock breaking pipe comprises a flexible outer sleeve film, an oxygenation guide pipe in the flexible outer sleeve film extends to the bottom and is filled with an adsorption combustion agent, and the top end of the flexible outer sleeve film is sealed through a hole sealing filling body. The method comprises the steps of manufacturing and installing the fracturing rock breaking pipe, sealing holes through the hole sealing filling body, laying the gas distribution pipeline and the wire, precisely injecting oxygen and synchronously exciting. Through modular integration and structural innovation, the problems that in a traditional liquid oxygen rock breaking technology, oxygenation is not uniform, pressure is unbalanced, excitation is not synchronous and the like are solved. The multi-stage gas distribution system is combined with the flow distributor to achieve dynamic distribution of liquid oxygen according to the drilling depth, the flexible outer sleeve film is matched with the hole sealing filling body to form a pressure self-balancing structure, a wire network is excited in parallel to guarantee millisecond-level synchronous ignition of multiple pipes, and static electricity prevention and removal grounding guarantees construction safety.

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 high-purity oxygen preparation equipment and an air separation system applying the high-purity oxygen preparation equipment. The high-purity oxygen preparation equipment comprises a high-purity oxygen tower and a high-purity oxygen tower evaporator, a high-purity nitrogen outlet in the top of the lower rectification tower is connected with a first gas inlet in the condensation side of the high-purity oxygen tower evaporator, and a first liquid outlet in the condensation side of the high-purity oxygen tower evaporator is connected with a reflux inlet in the top of the upper rectification tower; an oxygen-enriched gas outlet in the lower part of the lower rectifying tower is connected with a second gas inlet of a high-purity oxygen tower evaporator, and a second liquid outlet of the high-purity oxygen tower evaporator is connected with a reflux liquid inlet in the top of the high-purity oxygen tower or is connected with a reflux liquid inlet in the lower part of the upper rectifying tower; and an oxygen-enriched liquid outlet at the lower part of the upper rectifying tower is connected with a reflux liquid inlet at the top of the high-purity oxygen tower. The air separation system comprises double-tower nitrogen preparation equipment and the high-purity oxygen preparation equipment. High-purity oxygen or high-purity liquid oxygen products can be prepared on the basis of preparing high-purity nitrogen, the air separation efficiency is improved, and gas waste is reduced.

The invention relates to a full-flow afterburning cycle engine ignition matching control system, and belongs to the field of engine design. The oxygen pump and the fuel pump are symmetrically arranged on the two sides of the thrust chamber; the oxygen pump turbine is connected with the oxygen pump; the oxygen pump is respectively communicated with the liquid oxygen main valve and the liquid oxygen auxiliary valve through pipelines; the liquid oxygen main valve is communicated with the oxygen-enriched generator; the liquid oxygen auxiliary valve is communicated with the rich fuel generator; the oxygen-enriched generator is communicated with the thrust chamber after passing through the oxygen pump turbine; the fuel pump turbine is communicated with the fuel pump; the fuel pump is divided into two paths through the fuel main valve; one path is communicated with the thrust chamber; the other path is communicated with the fuel auxiliary valve; the auxiliary fuel valve is communicated with the oxygen-enriched generator; the two output ends of the thrust chamber are converged and then are communicated with a fuel stop valve; the fuel stop valve is communicated with the rich fuel generator; the rich fuel generator is communicated with the thrust chamber after passing through the fuel pump turbine; accelerated filling of the fuel system in the starting process is achieved, and the problems that in the starting process, a fuel-rich generator is prone to high-temperature combustion, and the climbing rate of the fuel system lags behind an oxygen system are solved.

The invention discloses a propellant filling system of a liquid rocket, which relates to the technical field of spaceflight and comprises movable filling equipment, a tank car / standard container for providing a propellant and a PLC (Programmable Logic Controller) system, wherein the movable filling equipment is communicated with a liquid oxygen storage tank or a kerosene storage tank of the tank car / standard container and the liquid rocket; the PLC system is in communication with the mobile filling equipment, the mobile filling equipment is controlled by the PLC system to execute a filling procedure in a corresponding filling mode, and the filling mode at least comprises a pump type filling mode and an extrusion filling mode; when the lift is larger than the preset first height, the PLC system controls the movable filling equipment to execute the filling procedure in a pump type filling mode; and when the lift is smaller than the preset second height or the flow is smaller than the preset flow, the PLC system controls the movable filling equipment to execute the filling procedure in an extrusion filling mode. The device has multiple filling modes and can be suitable for different filling occasions.

The utility model discloses a system for increasing dissolved oxygen in a water body. The system comprises an air separation oxygen generator, a liquid oxygen storage tank, a gas distributor and an aeration device. The air separation oxygen generator is used for preparing liquid oxygen, the liquid oxygen storage tank is used for storing the liquid oxygen, and the aeration device is used for dissolving pure oxygen in a water body through aeration to increase the dissolved oxygen in the water body so as to restore the dissolved oxygen in the anoxic water body to the normal concentration, and is used for increasing the dissolved oxygen in the anoxic river, lake and reservoir water bodies so as to restore the normal dissolved oxygen concentration.

The invention relates to the technical field of rocket power tests, and discloses a liquid oxygen supply system and a liquid oxygen supply method.The liquid oxygen supply system is characterized in that a liquid oxygen storage tank is provided with an extrusion gas inlet and a liquid oxygen inlet and outlet; the gas extrusion subsystem extrudes liquid oxygen in the liquid oxygen storage tank; the liquid oxygen filling subsystem is used for filling liquid oxygen into a liquid oxygen storage tank; the main regulating valve is connected with the liquid oxygen inlet and outlet; the input ends of the plurality of parallel branches are connected with the main regulating valve, and the output ends of the plurality of branches provide liquid oxygen for test pieces at different stations respectively; a branch regulating valve is arranged on each branch; the flow and pressure of each branch are adjusted by adjusting the opening degree of the main adjusting valve and adjusting the opening degree of the branch adjusting valves. The flow of each branch is adjusted by adjusting the opening degree of the adjusting valve of each branch, so that the resistance of each branch is as close as possible, and the high-precision control of the flow and pressure of test pieces at different stations is achieved; and multi-path equal-pressure equal-flow liquid oxygen distribution is realized. And the main regulating valve is combined to regulate the total flow.

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 diving bell air supply system for diving and an air supply method thereof.The air supply system comprises a diving bell body, a diving bell umbilical cord, a diver umbilical cord and a bell-borne air supply unit, the diving bell umbilical cord comprises an air supply pipeline and a breathing air pipeline, and high-pressure environment air is provided for the diving bell body, and breathing air is provided for operators; the clock-borne gas supply unit comprises a helium bottle, a liquid nitrogen Dewar bottle and a liquid oxygen Dewar bottle, high-pressure helium-oxygen mixed gas is stored in the helium bottle, gas outlet pipelines of the liquid nitrogen Dewar bottle and the liquid oxygen Dewar bottle are connected to the breathing gas supplementing pipe in parallel, and supplemented nitrogen and / or oxygen are / is adjusted based on the working depth of the diving clock body. The breathing air supply pipe and the breathing air supplementing pipe are connected to the inlet end of the busbar after being connected in parallel and converged, the inlet end of the busbar is further connected with a breathing air pipeline, and the outlet end of the busbar is connected with multiple diver umbilical cords. The proportion of helium, nitrogen and oxygen can be flexibly adjusted according to the current operation depth of the diving bell, and the breathing requirements of divers at different water depths are effectively met.

The invention provides a manufacturing and assembling process of a tunneling liquid oxygen rock breaking fracturing device, the fracturing device, an exhaust pipe, a liquid injection pipe, an electric ignition head, an ignition wire and a manufacturing tool are included, the assembled fracturing device is safe, reliable and extremely high in operability, drilling is completed on a tunneling section according to design, and the fracturing efficiency is greatly improved. The assembled fracturing device is pushed to a certain position of a blast hole and blocked, and oxygen injection detonation can be completed according to a program; the liquid oxygen rock breaking fracturing device is good in rock breaking effect when being used for tunneling, simple, easy to use, reliable, efficient, economical, applicable and capable of being used in various scenes. Compared with traditional explosive blasting, liquid oxygen rock breaking is small in harmful effect influence range, few in toxic and harmful products, higher in efficiency and lower in cost, and is a novel green, environment-friendly, efficient and safe tunneling construction technology.