39 results about "High pressure hydrogen" patented technology

A system and method for liquefying a hydrogen gas feed stream uses a high-pressure hydrogen stream from a storage source to provide refrigeration to the system. After providing refrigeration to the system, the hydrogen from the high-pressure storage source is at a pressure not lower than the pressure of a cold box feed stream of the system, where the cold box feed stream includes the hydrogen gas feed stream and at least one recycle stream, and is not recycled back through the system but instead exits the system.

An austenitic stainless steel material that has high strength and has excellent hydrogen embrittlement resistance in a high-pressure hydrogen gas environment is provided. An austenitic stainless steel material of the present disclosure has a chemical composition consisting of, in mass%, C: 0.100% or less, Si: 1.000% or less, Mn: 8.00 to 20.00%, P: 0.050% or less, S: 0.0050% or less, Cr: 18.00 to 30.00%, Ni: 10.00 to 25.00%, N: more than 0.350 to less than 0.700%, V: 0.010 to 0.200%, Nb: 0.010 to 0.300%, Al: 0.200% or less, and O: 0.0100% or less, with the balance being Fe and impurities, in which Fn1 defined by Formula (1) in the description is 18.0 or more when the content of Ni is less than 17.00% and is 22.0 or more when the content of Ni is 17.00% or more. In the steel material, a number density of (Cr, Nb) composite precipitates having an equivalent circular diameter of 50 to 500 nm is 1.00 / µm2 or more.

Provided is a material for use in a hydrogen storage structure, a hydrogen storage single tube, and a material composition for a hydrogen storage structure used for the preparation of the material for use in the hydrogen storage structure and the hydrogen storage single tube. The hydrogen storage single tube is provided with a honeycomb-shaped high pressure hydrogen storage structure with a micron-sized pore diameter and is lightweight. A hydrogen storage structure having a pore diameter of 150 μm and a pipe wall thickness of 35 μm has an ultimate pressure of >200 MPa, a Rockwell hardness of 86-89, a high temperature resistance of >1900° C., a low temperature resistance of <−260° C., low thermal conductivity, high temperature thermal insulation, and strong acid and alkali resistance. In a high density hydrogen work atmosphere and a complicated dynamic environment, the high pressure hydrogen storage structure is very stable.

The utility model discloses a high pressure hydrogen storage bottle integrated formula support for hydrogen energy automobile relates to hydrogen energy automobile field, including base, the top of base is provided with frame, a plurality of place pad all are established in the top of base for placing hydrogen storage bottle, arc clamping sleeve sets up on hydrogen storage bottle, connecting column sets up in the top of base, and the side end of arc clamping sleeve is in contact with the top end of connecting column, a pair of locking parts, symmetric setting in the top of base for making the side end of arc clamping sleeve extrusion contact the top end of connecting column, through this structure design, the staff is convenient in narrow frame body space installs or dismounts hydrogen storage bottle, in the automobile frame body space, can not use the tool to complete the dismounting or installation of hydrogen storage bottle, directly with hand twists the thread cover and can realize locking and release, save up the trouble of looking for, using and storing special tool.

This invention relates to the field of polyolefin waste plastic resource utilization technology, and in particular to a method for liquefying waste plastics into aviation kerosene under mild conditions using solvent-based hydrogen supply. The aim is to overcome the problems of harsh reaction conditions, reliance on precious metal catalysts and high-pressure hydrogen, and low selectivity of the target product in existing technologies. This method uses inexpensive Fe / Beta as a catalyst and can efficiently convert waste plastics such as polyethylene into aviation kerosene under mild conditions of solvent-based hydrogen supply. The catalyst system of this invention is simple to prepare, inexpensive, and recyclable. The raw materials are readily available, and the product distribution can be adjusted as needed. The aviation kerosene yield in the oil product can reach 96.9%, which has significant practical application value and is suitable for industrial production and application.

The application discloses a piston compressor driven by liquid pressure, which integrates hydraulic and gas compression components in one cylinder, drives a hydraulic piston by rotation of a crankshaft, and then drives a gas piston by using the incompressible characteristics of liquid, fills the upper part of the gas piston with sealing liquid, fills the gap between sealing rings, and reduces gas leakage. The structure can also combine lubrication and hydraulic medium, store hydraulic oil in the crankcase, use the hydraulic oil as lubricating medium, and further reduce the size of the equipment by adopting an oil pump built-in mode. Meanwhile, the piston compressor can be combined into a multi-stage compression form to further improve the discharge pressure. The piston compressor can be used for high-pressure hydrogen filling piston compressors of gas stations and energy storage stations, and can also be used in other high-pressure and super-high-pressure gas compressor fields.

This invention provides an insulating encapsulation gasket and an electrolytic cell including the gasket. The insulating encapsulation gasket includes a gasket body with an annular structure. A first annular seal is provided on one side surface of the gasket body, and a second and third annular seals are sequentially provided on the other side surface of the gasket body in a direction away from the center of the gasket body. The diameter of the second annular seal is smaller than the diameter of the first annular seal, and the diameter of the first annular seal is smaller than the diameter of the third annular seal. This insulating encapsulation gasket of the present invention achieves sealing of the metal frame of the alkaline electrolytic cell, which is beneficial for large-scale alkaline hydrogen production equipment, effectively preventing leakage of the electrolytic cell, improving the safety of alkaline hydrogen production, and has a simple structure. It also helps to improve the purity of process gases in medium and high pressure hydrogen equipment, facilitates fluctuating current hydrogen production, and effectively prevents alkaline leakage and gas purity problems in fluctuating power hydrogen production. It has great application value and is convenient for large-scale industrial production.

The application relates to the technical field of hydrogen storage cylinder pressure relief and detection, and particularly discloses an anti-explosion gas storage cylinder limit pressure detection device and a pressure relief structure thereof. When the pressure in the hydrogen storage cylinder abnormally rises and reaches a critical value, the pressure relief mechanism is automatically started to guide the high-pressure hydrogen gas to a limit relief joint. In the process, the pressure relief mechanism intervenes in the high-speed hydrogen gas flow to effectively reduce the flow rate and pressure of the hydrogen gas. When the pressure relief mechanism is started, the pre-fire extinguishing mechanism is driven to pre-extinguish the hydrogen gas after the pressure relief of the pressure relief mechanism, controllable and orderly relief of the high-pressure hydrogen gas is realized, violent impact caused by instantaneous pressure drop is avoided, and the early intervention of the fire extinguishing agent in the relief path can actively inhibit the combustion reaction caused by static electricity or external fire sources, so that the secondary explosion risk in the relief process is fundamentally eliminated, and the safety is greatly improved from passive pressure relief to active explosion suppression.

The application belongs to the field of sealing materials, and discloses a high-pressure-resistant hydrogen embrittlement-resistant metal-rubber composite sealing material and a preparation method thereof. The high-pressure-resistant hydrogen embrittlement-resistant metal-rubber composite sealing material comprises, from bottom to top, a titanium alloy base material, a titanium oxide layer generated in situ on the surface of the titanium alloy base material, and a rubber layer bonded to the surface of the titanium oxide layer through hot pressing treatment. The application also discloses a preparation method of the high-pressure-resistant hydrogen embrittlement-resistant metal-rubber composite sealing material. By constructing a hydrogen-inhibiting oxidation layer and combining surface roughening, laser irradiation treatment and hot pressing treatment, a metal-rubber composite sealing material that can maintain stable deformation and is resistant to hydrogen embrittlement in a high-pressure environment is obtained. After the high-pressure-resistant hydrogen embrittlement-resistant metal-rubber sealing material is kept in a 100MPa high-pressure hydrogen environment for 1000 hours, the tensile strength retention rate is greater than or equal to 88%, the elongation retention rate after breaking is greater than or equal to 80%, and the deformation amount is less than or equal to 0.5%.

A high-pressure hydrogen test fixture includes a main body having a test cavity, a flange covering the test cavity when attached to the main body to thereby form a test chamber, a plurality of flange bolts and corresponding nuts to attach the flange to the main body, a flange seal arranged in a seal groove of the main body, an inlet channel between the test chamber and an inlet port, a vent channel between the test chamber and a vent port, and a sample carrier. The flange seal forms a seal between a sealing surface of the flange and the seal groove of the main body. The sample carrier has at least one of a face seal groove and a radial seal groove for receiving a test article. A seal formed by the test article and the test fixture is arranged between the inlet channel and the vent channel.

The present application relates to a bimetallic composite pipe for storing and transporting high-pressure hydrogen and its manufacturing process, wherein the bimetallic composite pipe for storing and transporting high-pressure hydrogen is manufactured by submerged arc welding of a bimetallic composite pipe blank, the bimetallic composite pipe blank comprising an alloy steel layer and an austenitic stainless steel cladding layer arranged one above the other. The austenitic stainless steel cladding layer is obtained by applying a metallic flux-cored wire, an outer wall of the bimetallic composite pipe is obtained by welding with an alloy submerged arc welding wire, and an inner wall of the bimetallic composite pipe is obtained by welding with an austenitic stainless steel submerged arc welding wire.Bimetallic composite pipe for storing and transporting high-pressure hydrogen is characterized by excellent hydrogen embrittlement resistance as well as good fracture and impact strength, thus ensuring the safe and efficient storage and transport of high-pressure hydrogen.

This utility model relates to the field of hydrogen energy storage cylinder technology, specifically a hydrogen energy storage cylinder with a pressure relief structure. It includes a cylinder body, a pressure relief assembly, and an energy recovery assembly. The energy recovery assembly includes a turbine tube, impeller blades, and a motor. A fixed shell is fixedly connected to the center of the turbine tube, and the lower surface of the fixed shell is fixedly connected to the motor. A drive shaft is rotatably connected inside the motor, passing through the fixed shell and extending to its upper surface. When the cylinder pressure is too high, the pressure relief assembly opens, allowing high-pressure hydrogen to enter the turbine tube, driving the impeller blades to rotate. The blades, through a pull rod and a fixed ring, drive the drive shaft to rotate, thus driving the motor to generate electricity and recover energy. Pulling the pull rod adjusts the blade angle, changing the hydrogen thrust effect and affecting the drive shaft speed and energy recovery efficiency. The pressure relief assembly can release excessive pressure in a timely manner, ensuring cylinder safety. Utilizing the pressure relief energy to generate electricity improves energy efficiency.

The low-temperature high-pressure hydrogen lossless filling system provided by the application mainly comprises the preparation of low-temperature high-pressure hydrogen, the precooling of a low-temperature high-pressure storage tank and the filling of the low-temperature high-pressure storage tank. The preparation process of the low-temperature high-pressure hydrogen comprises two forms, one of which uses normal-temperature gaseous hydrogen as a gas source, and the other of which uses normal-pressure liquid hydrogen as a gas source. The filling system can ensure that there is no loss of hydrogen during the preparation, precooling and filling of the low-temperature high-pressure hydrogen, improve the transportation density and filling rate, and reduce the filling energy consumption and transportation cost. In addition, the selection of key components and the design of multiple bypasses in the system ensure the stability, efficiency and safety of the operation of the low-temperature high-pressure hydrogen system and guarantee the storage quality of the low-temperature high-pressure hydrogen, which is conducive to the high-quality utilization and wide promotion of the low-temperature high-pressure hydrogen after storage and transportation.

The application discloses a variable nozzle structure ejector suitable for a high-power fuel cell hydrogen circulation system and relates to the field of fuel cell hydrogen circulation.The first flow channel is arranged through the ejector body, one end of the first flow channel is provided with a mixing-boosting component, the first flow channel is provided with a high-pressure hydrogen gas inlet component, the high-pressure hydrogen gas inlet component is provided with the second flow channel, and the second flow channel is communicated with external high-pressure hydrogen gas; the end of the second flow channel is connected with the ejector throat flow channel, one side of the ejector throat flow channel is connected with a cavity, the cavity penetrates to the outside of the ejector body, a movable structure is arranged in the cavity in a sliding mode, the movable structure is driven by an external actuator to move up and down along the cavity, the cross-sectional area of the ejector throat flow channel is changed, the high-pressure hydrogen gas flow and the ejecting performance are matched with the power demand, the stability of the hydrogen supply flow and the ejecting performance can be ensured in a complex bumpy road condition, and the wide power range adjustment is realized, and the long-term efficient and stable operation of the high-power fuel cell system of a heavy commercial vehicle is ensured.

The application discloses a kind of industrial by-product hydrogen compression purification system and method, system includes no gas valve mechanical compressor, atomizer, electrochemical compressor, dehumidifier and gas tank;First atomizer is set in the compression cavity of no gas valve mechanical compressor, for in the process of no gas valve mechanical compressor compression to the compression cavity in water spray;The compressed gas outlet of no gas valve mechanical compressor is connected with the anode side inlet of electrochemical compressor by pipeline and is equipped with second atomizer for hydrogen humidification in pipeline;The cathode side of electrochemical compressor is equipped with the atomizer for humidifying the cathode membrane of electrochemical compressor;The cathode side outlet of electrochemical compressor is connected with gas tank and is equipped with dehumidifier for hydrogen dehumidification on the connecting pipeline.The application fully combines the characteristics of mechanical compressor and electrochemical compressor, designs efficient and feasible system, and obtains relatively pure high-pressure hydrogen.

The utility model discloses a vacuum detection device for hydrogen leakage detection, particularly relates to the technical field of hydrogen leakage detection, and comprises a vacuum box body, one side of an inner cavity of the vacuum box body is provided with a vacuum cavity, and the other side of the inner cavity of the vacuum box body is provided with an equipment cavity. According to the utility model, firstly, hydrogen equipment to be detected or a sample piece to be detected is placed in the vacuum cavity, the vacuum pump is started to vacuumize the interior of the vacuum cavity, and whether the interior of the vacuum cavity leaks gas or not is judged by observing whether a detection value of the pressure sensor changes or not after vacuumizing is finished; then hydrogen in the high-pressure hydrogen cylinder is controlled to be input into hydrogen equipment to be detected or a sample piece to be detected, vacuumizing is conducted after a certain time, the hydrogen content is detected through the semiconductor sensor, whether leakage exists or not can be judged, and detection in the mode is not affected by the external environment; the method can be used for testing in any environment, and the detection sensitivity and accuracy can be improved.

This invention discloses a hydrogen embrittlement testing device for high-pressure gaseous hydrogen environment samples, relating to the field of materials testing technology. It includes a high-pressure hydrogen tensile container, an elastic sealing container, and a compensation container. The high-pressure hydrogen tensile container is sealed and equipped with a tensile rod, one end of which penetrates the container and slides in a sealed manner. The elastic sealing container is located inside the high-pressure hydrogen tensile container and is connected to both the inner end of the tensile rod and the inner wall of the container. The compensation container is sealed and equipped with a sliding piston, which divides the compensation container into a liquid chamber and a gas chamber. The liquid chamber is connected to the elastic sealing container, and the gas chamber is connected to the high-pressure hydrogen tensile container. This device solves the problem that gas-liquid conversion mechanisms lack a real-time volume compensation mechanism when used in high-pressure gas environments, leading to pressure response lag and excessive fluctuation amplitude, thus failing to meet the requirements of precision testing.

This invention provides a method and application for strengthening the surface of a stainless steel diaphragm. First, the surface of the stainless steel diaphragm is bombarded with ions generated by an inert gas to remove the oxide film and reduce surface roughness, providing suitable surface conditions for subsequent magnetron sputtering aluminum deposition and vacuum heat treatment processes involving solder coating. Then, an aluminum film is deposited on the surface of the stainless steel diaphragm by magnetron sputtering. Next, a Ni-Cr-Fe based solder is coated onto the aluminum-coated surface of the stainless steel diaphragm. Vacuum heat treatment then forms a strengthening layer on the aluminum-coated surface using the solder. This method achieves a good strengthening effect on the surface of the stainless steel diaphragm, meeting the design pressure of the diaphragm-type high-pressure hydrogen compressor at hydrogen refueling stations, which is increased to 90 MPa to improve hydrogen refueling efficiency.

This invention relates to the field of high-pressure gas cylinder safety assessment technology, specifically to a method for estimating the burst strength of a high-pressure hydrogen cylinder with a plastic-lined, fully carbon fiber-wound liner. The high-pressure hydrogen cylinder with a plastic-lined, fully carbon fiber-wound liner consists of a plastic liner, a spirally wound carbon fiber layer, and a circumferentially wound carbon fiber layer. The inner diameter of the plastic liner is D0, and its outer diameter is D1. The outer diameter of the spirally wound layer is D2, and the outer diameter of the circumferentially wound layer is D3. The plastic liner includes front and rear end sections and a central cylindrical section. The spirally wound layer is fully wound on the end sections and the cylindrical section, while the circumferentially wound layer is only wound on the cylindrical section. The fiber winding adopts geodesic winding theory, and the internal pressure is entirely borne by the fibers. By analyzing and estimating the maximum stress in the circumferential and meridional directions of the fibers under internal pressure, the burst strength of the gas cylinder can be estimated. This invention, through its method for calculating the burst strength of gas cylinders, provides a more convenient, intuitive, and rapid method for predicting the burst strength of gas cylinders.

This invention discloses an experimental apparatus and method for suppressing spontaneous combustion of high-pressure hydrogen leaks by ammonia blending. It relates to the field of hydrogen leak spontaneous combustion experimental technology. The experimental apparatus includes: a high-pressure hydrogen supply module, an anti-liquefaction ammonia supply module, a staged blending module, and a recording module. The high-pressure hydrogen supply module provides high-pressure hydrogen as a venting gas source; the anti-liquefaction ammonia supply module maintains ammonia in a fully gaseous state before feeding it into the staged blending module; the staged blending module includes a venting guide section and an ammonia blending port circumferentially located at the inlet end of the venting guide section; the inlet end of the venting guide section is connected to the high-pressure hydrogen supply module; the anti-liquefaction ammonia supply module injects ammonia into the boundary of the high-pressure hydrogen jet during venting of high-pressure hydrogen; the recording module records the venting plume, pressure wave, and ignition delay time. This invention enables anti-liquefaction ammonia supply and dynamic boundary layer blending to support research on suppressing spontaneous combustion of high-pressure hydrogen leaks and provides experimental basis for subsequent engineering applications.

The application discloses a kind of energy storage energy supply control method of hydrogen production energy supply system and related device, comprising: continuously generating hydrogen by hydrogen production reaction device, after pretreatment, it is transported to delivery shunt pipeline;Real-time filling demand is obtained, the real-time filling amount of current hydrogen to be filled is calculated, control pipeline valve opens filling passage, and hydrogen is transported to hydrogen equipment to complete real-time filling;Difference between hydrogen production total amount and real-time filling amount is calculated, determine the residual hydrogen amount in delivery shunt pipeline, control pipeline valve switches to storage passage, and the hydrogen of residual hydrogen amount is transported to hydrogen compression device;The hydrogen of residual hydrogen amount is compressed to preset high pressure state, and transported to high pressure hydrogen storage tank and stored sealingly.The application sets filling passage and storage passage, and switches pipeline valve by calculating hydrogen flow value, effectively improves the energy storage function safety and efficiency of hydrogen production energy supply system.

A device for strain-controlled fatigue tests in a high-pressure hydrogen environment, characterized in that it comprises a hydrogen filling container (1) designed as a cylindrical housing with an inner cavity; wherein a first central opening (1-1) and a second central opening (1-7) for guiding a specimen (2) are provided in the upper and lower central regions of the hydrogen filling container (1); wherein the two clamping ends of the specimen (2) are arranged at the first central opening (1-1) and the second central opening (1-7) respectively and are sealed by means of a corrugated T-shaped rubber clamping element (5) and a T-shaped rubber clamping element (12), and wherein the working section of the specimen (2) is located in the inner cavity of the hydrogen filling container (1); wherein a hydrogen filling opening (1-3) is formed at the upper region of the hydrogen filling container (1), on which an inlet valve (7) is mounted;wherein observation openings (1-4) are formed on the side surface of the hydrogen filling container (1), in which a transparent observation window pane (10) is fitted; and wherein two through-openings (1-9) for the passage of conical rubber clamping elements (14) are further formed on the side surface of the hydrogen filling container (1) in the vertical direction.

An austenitic stainless steel material that has high strength and has excellent hydrogen embrittlement resistance in a high-pressure hydrogen gas environment is provided. An austenitic stainless steel material of the present disclosure has a chemical composition consisting of, in mass%, C: 0.100% or less, Si: 1.000% or less, Mn: 8.00 to 20.00%, P: 0.050% or less, S: 0.0050% or less, Cr: 18.00 to 30.00%, Ni: 10.00 to 25.00%, N: 0.700 to 1.000%, V: 0.010 to 0.200%, Nb: 0.010 to 0.300%, Al: 0.200% or less, and O: 0.0100% or less, with the balance being Fe and impurities, in which Fnl defined by Formula (1) in the description is 18.0 or more when the content of Ni is less than 17.00% and is 22.0 or more when the content of Ni is 17.00% or more.

This invention discloses a nano-solid-state hydrogen storage material and its preparation method, belonging to the field of new energy materials technology. The nano-solid-state hydrogen storage material has a core-shell structure, comprising a nano-magnesium-based active phase core and a functionalized porous carbon material outer shell; the core contains in-situ grown multi-metal nanocatalyst particles; the outer shell is doped with non-metallic elements and loaded with metal-organic framework derivative nanoparticles; the core-shell structure is dispersed in a three-dimensional interconnected carbon-based network framework. The preparation method includes: preparing a multi-metal-organic framework precursor solution; synthesizing multi-metal-organic framework nanoparticles using a solvothermal method; chemically combining with a magnesium source and a nickel source to obtain a precursor composite; carbonization treatment to obtain a porous carbon-coated multi-metal nanocatalyst@magnesium-based composite material; constructing a three-dimensional network framework by combining with a functionalized carbon source and metal-organic framework derivatives; and high-pressure hydrogenation treatment. The material of this invention exhibits a low hydrogen desorption temperature, rapid hydrogen absorption and desorption kinetics, and excellent cycle stability.

The invention provides an in-situ confinement catalytic hydrogenation method of magnesium nanoparticles. The in-situ confinement catalytic hydrogenation method comprises the following steps: S1, premixing treatment: uniformly mixing the magnesium nanoparticles and three-dimensional fold structure MXene nanosheets under the protection of an inert atmosphere; s2, confinement assembly: carrying out mechanical treatment on the mixture obtained in the step S1 to form an Mg / MXene composite precursor; s3, in-situ catalytic hydrogenation: putting the Mg / MXene composite precursor into a high-pressure hydrogenation reaction device, introducing hydrogen, increasing the pressure of the high-pressure hydrogenation reaction device to 3.0-8.0 Mpa, increasing the temperature to 180-280 DEG C, and carrying out heat-preservation and pressure-maintaining reaction for 2-10 hours; and S4, cooling and collecting: after the reaction is finished, cooling and releasing the pressure, and collecting a product under the protection of an inert atmosphere to obtain the MgH2 / MXene nano composite material. According to the method, the MXene nanosheet with the three-dimensional fold structure is utilized, the magnesium nanoparticles are effectively isolated and stabilized and prevented from being agglomerated in the hydrogenation process, meanwhile, an active catalytic phase is generated in situ to improve the hydrogenation reaction efficiency, and rapid and almost complete hydrogenation of magnesium can be achieved under the mild condition.

The application discloses a hydrogenation-diffusion method for recycling block neodymium-iron-boron magnets, and pre-treatment, hydrogenation, diffusion and post-treatment processes are sequentially carried out in a closed reaction system, and oxygen-free transmission is realized among units of the system. The method comprises the following steps: in the pre-treatment device, low-temperature hydrogen reduction, mechanical stripping and vacuum thermal activation are sequentially performed to form a hydrogen adsorption active interface; in the high-pressure hydrogenation furnace, hydrogenation treatment is carried out by adopting three-stage temperature-pressure synergistic regulation to realize hydrogen body phase penetration and Nd2Fe 14 BH x phase domain generation; in the diffusion furnace, the hydrogenation product is sequentially sent into a preheating activation area, a main diffusion area and a cooling transition area to complete phase directional separation and nano structure freezing in a hydrogen-argon mixed atmosphere; and in the inert atmosphere post-treatment unit, crushing and grading are carried out in a high-purity argon environment to obtain regenerated magnetic powder. The application effectively solves the technical problems of uneven hydrogenation of large-size block magnets, generation of impurities in the diffusion process and out-of-control oxidation in the post-treatment.

This invention discloses a hydrogen pressure energy recovery system, method, equipment, and medium for a hydrogen fuel cell, belonging to the field of resource scheduling. The system includes: a high-pressure hydrogen cylinder, an input valve assembly, an electro-conversion assembly, an energy storage device, a pressure-reducing assembly, an output main valve assembly, and a hydrogen fuel cell. When the pressure at the output of the pressure-reducing assembly exceeds a threshold, the input valve assembly transfers hydrogen from the high-pressure hydrogen cylinder to the electro-conversion assembly and the output main valve assembly, respectively. When the pressure at the output of the pressure-reducing assembly is less than the threshold, the input valve assembly transfers hydrogen from the high-pressure hydrogen cylinder to the output main valve assembly. This invention enables the recovery and utilization of hydrogen pressure energy through the electro-conversion assembly, reducing resource waste, improving resource utilization, and avoiding the impact of large amounts of heat generated by the pressure-reducing device on the safety of ship equipment, thus improving the practicality and reliability of the ship.

The utility model relates to test device technical field provides a low temperature high pressure hydrogen environment mechanics test board, including hydrogen environment device, refrigerating plant and testing arrangement, hydrogen environment device includes hydrogen environment box and hydrogen supply mechanism, and hydrogen supply mechanism supplies hydrogen to hydrogen environment box, refrigerating plant refrigerates to hydrogen environment box, testing arrangement includes test fixture, transmission link and drive mechanism, and transmission link reciprocatingly slides in hydrogen environment box, and transmission link first end reaches to hydrogen environment box inside, and transmission link second end reaches to hydrogen environment box outside, and test fixture includes first clamping part and second clamping part, and first clamping part is opposite fixed with hydrogen environment box, and second clamping part is connected with transmission link first end, and drive mechanism drives transmission link reciprocatingly sliding. Thus, in combination with refrigerating plant and hydrogen supply mechanism can provide low temperature, high pressure hydrogen environment, install the material to be measured in test fixture, utilize drive mechanism to be able to exert the pulling force or pressure to the material to be measured to thereby can complete the mechanical property test to the material to be measured.

This application relates to the field of compressor technology and discloses a high-pressure hydrogen compressor, including a compressor head, a base, and a hydraulic assembly. The base is connected to a drive structure, which drives the compressor head via the hydraulic assembly. The compressor head includes a diaphragm chamber and a diaphragm, with the diaphragm dividing the diaphragm chamber into a gas chamber and a liquid chamber. The liquid chamber is connected to an overflow valve. The hydraulic assembly includes a cylinder, a plunger cylinder, and a piston rod. The plunger cylinder is movably disposed within the cylinder, and the stroke volume of the plunger cylinder is equal to the effective volume of the compressor head. This high-pressure hydrogen compressor shifts the oil replenishment process from the traditional intake stroke to the end of the compression stroke. The overflow valve releases excess oil in real time, forming a mechanical self-balancing mechanism of "replenishing as much as is overflowed." This fundamentally avoids the pre-set mismatch and verification lag defects of intake oil replenishment, eliminating the need for high-precision sensors and intelligent prediction algorithms. It significantly improves the reliability, safety, and engineering practicality of the high-pressure hydrogen compressor under ultra-high pressure conditions.