215 results about "Cryopump" patented technology

The invention discloses a low-temperature pump for a fusion device and the fusion device, and relates to the field of fusion devices.The low-temperature pump comprises a low-temperature pump body, an adsorption space is defined by the low-temperature pump body, and a first medium inlet communicating with the adsorption space is formed in the low-temperature pump body; the valve assembly is arranged on the cryogenic pump main body, and the valve assembly is used for opening or closing the first medium inlet; and at least part of the adsorption assembly is arranged in the adsorption space, the adsorption assembly is used for adsorbing gas in the adsorption space, and the adsorption assembly is detachably arranged on the cryogenic pump body. Therefore, the adsorption assembly is detachably arranged on the cryopump main body, the adsorption assembly can be independently replaced, the maintenance cost of the cryopump can be reduced, the production cost of fusion energy can be reduced, the economic benefit is further improved, and the adsorption assembly can be replaced without shutdown under the condition that a certain adsorption assembly is replaced.

A refrigerator includes: a refrigerator cylinder including a cylindrical first-stage cylinder and a cylindrical second-stage cylinder configured to have a smaller inner diameter than the first-stage cylinder and coupled to the first-stage cylinder; a cylindrical first-stage displacer disposed inside the first-stage cylinder; a first-stage cold storage device disposed inside the first-stage displacer; a cylindrical second-stage displacer configured to have a smaller outer diameter than the first-stage displacer, disposed inside the second-stage cylinder, and coupled to the first-stage displacer; a second-stage cold storage device disposed inside the second-stage displacer; and a reciprocating mechanism that reciprocates, in the refrigerator cylinder into which a coolant gas is introduced, the first- and second-stage displacers in a direction along a central axis line of the refrigerator cylinder. A non-fluorine coating layer is formed on an outer circumferential surface of the second-stage displacer, and a clearance is provided between the coating layer and the second-stage cylinder.

A cryopump includes: a cryopump container defining a cryopump intake port; a cryocooler including a first cooling stage and a second cooling stage; a radiation shield thermally coupled to the first cooling stage and extending from the cryopump intake port into the cryopump container; an intake port plate thermally coupled to the first cooling stage and extending along a plane perpendicular to an axial direction, a gas inlet being formed between the intake port plate and the radiation shield; a cryopanel unit thermally coupled to the second cooling stage and disposed inside the radiation shield, a frost accommodation space being formed between the cryopanel unit and the intake port plate; and a skirt thermally coupled to the first cooling stage and extending from an outer periphery of the intake port plate into the radiation shield, a gas flow path being formed between the skirt and the radiation shield.

A cold storage material according to an embodiment contains a rare earth aluminum oxide containing at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, in which a Group 1 element is contained in an amount of 0.001 atom % or more and 10 atom % or less, and a maximum volumetric specific heat value in a temperature range of 2 K or more and 10 K or less is 0.5 J / (cm3·K) or more.

The invention discloses a multi-stage isolation high vacuum obtaining system of a neutral beam injection device and a control method, and relates to the field of nuclear fusion Tokamak vacuum pumping design. The low-temperature pump unit comprises a plug-in low-temperature pump in a neutral beam vacuum chamber, and the plug-in low-temperature pump is used for refrigerating and cooling liquid nitrogen and liquid helium to adsorb gas to realize vacuum pumping; the low-temperature pump preceding-stage air extractor unit comprises a molecular pump unit, a roots pump unit and a mechanical pump unit; an inlet of the molecular pump set is connected with the neutral beam vacuum chamber through a gate valve, and an outlet of the molecular pump set is connected with an inlet of the roots pump set through a forestage valve. An inlet of the roots pump set is connected with the neutral beam vacuum chamber through a preceding stage valve and a pre-pumping valve, and an outlet of the roots pump set is connected with the mechanical pump set through the preceding stage valve. By adopting a multi-stage vacuum shielding technology and a step-by-step start-stop strategy, step-by-step transition from low vacuum to high vacuum and from high vacuum to low vacuum can be efficiently, stably and reliably realized, and an air extractor unit and a vacuum environment are protected from being polluted.

The invention discloses a testing method and device of a low-temperature pump, electronic equipment and a storage medium, and relates to the technical field of vacuum technology and vacuum pump performance tests.The testing method of the low-temperature pump comprises the steps that the first pressure of a first inflation chamber is obtained, and an air distribution mode is determined based on the first pressure; after gas distribution is completed based on the gas distribution mode, an impact test is started to introduce gas into the cryogenic pump; and acquiring temperature test data of the cryogenic pump, and determining the validity of the current test based on the temperature test data. According to the testing method of the low-temperature pump, the gas distribution process is more accurate through multiple gas distribution modes, the validity of the test data is judged through the temperature test data of the impact test, and the transition capacity parameter of the low-temperature pump is subjected to process inspection depending on experience; the method is converted into a standardized metering process which is high in reliability, high in efficiency and reproducible.

The invention discloses an adsorption and regeneration integrated low-temperature pump suitable for a large fusion refrigeration system and a working method.The adsorption and regeneration integrated low-temperature pump comprises a main valve, a shell, a front flange, a pump plug, a first-stage adsorption and regeneration device, a second-stage adsorption and regeneration device, an executing mechanism and a regeneration chamber, the main valve is installed on the pump plug, and the front flange and the pump plug are arranged on the shell; the first-stage adsorption regeneration devices are arranged in the shell and mounted on the front flange and the pump plug, the second-stage adsorption regeneration device is located between the first-stage adsorption regeneration devices and also mounted on the front flange and the pump plug, the execution mechanism is mounted on the pump plug, and the regeneration chamber is mounted on the outer side of the shell. The suction rate of the low-temperature pump is effectively increased, the high uniformity of the low-temperature surface adsorption effect is achieved, the equipment manufacturing and assembling difficulty is lowered, the reliability and environmental adaptability of the overall structure are improved, and long-term stable operation of the low-temperature pump is ensured.

The present invention relates to an integrated LNG loading and unloading skid, which comprises a set of LNG loading and unloading arms and a loading and unloading skid body. An auxiliary pipeline is installed on the loading and unloading skid body. The auxiliary pipeline includes a vent pipeline, a drainage pipeline, and a nitrogen purging and protection pipeline. A loading and unloading pipeline system for realizing integrated loading and unloading is installed on the loading and unloading skid body. The loading and unloading pipeline system includes a vapor pipeline, a liquid-phase loading pipeline, a liquid-phase unloading pipeline, and a vaporization and pressurization pipeline. The present invention realizes the functions of loading or unloading according to needs with a single skid-mounted device through the combination of the liquid-phase loading pipeline and the liquid-phase unloading pipeline. At the same time, the setting of the direct unloading pipeline and the pump unloading pipeline realizes the dual-purpose process of cryogenic pump unloading and vaporizer pressurization unloading, saves production costs, and has good social benefits.

The invention provides a cryogenic system and a vacuum processing method, which can improve the maintaining precision of the exhaust speed in a cryopump. The height of the heat shield (11) is a first height (H11). Among the regions defined by the heat shield case (11) and the baffle (13), a region extending from the opening (11A) of the heat shield case (11) to 1 / 2 of the first height (H11) is a temperature adjustment region (10S). At least one of a portion of the heat shield (11) included in the temperature adjustment region (10S) and the baffle (13) is a portion to be heated. A cryogenic system (1) is provided with: a temperature sensor (15) positioned within a temperature adjustment region (10S); a heating unit (16) that heats the portion to be heated; and a control unit (20) that controls the driving of the heating unit (16). The control unit (20) controls the driving of the heating unit (16) on the basis of the value detected by the temperature sensor (15) so that the temperature of the shutter (13) becomes a prescribed value.

The utility model belongs to the technical field of photovoltaic power generation, and discloses an anti-corrosion cold shield of evaporation equipment for preparing perovskite materials by a full-dry method, the evaporation equipment comprises an evaporation source, and perovskite material molecules are evaporated by the evaporation source. The anti-corrosion cold shield comprises a vacuum cavity, a cold shield plate, a cold shield plate fixing column, a vapor chamber, a low-temperature pump, a refrigerant pipe, a vapor chamber fixing column and a cold trap. The cold shield plate comprises a plate main body, the edge of the cold plate main body is provided with a bending part, and the bending part is bent towards the low-temperature pump. The low-temperature pump is protected through the anti-corrosion cold shield plate, maintenance of the low-temperature pump is reduced, cost is saved, and efficiency is improved.

This invention discloses a testing method, apparatus, electronic device, and storage medium for cryogenic pumps, relating to the technical fields of vacuum technology and vacuum pump performance testing. The testing method includes: acquiring a first pressure in a first filling chamber and determining a gas distribution mode based on the first pressure; after completing gas distribution based on the gas distribution mode, initiating an impact test to introduce gas into the cryogenic pump; acquiring temperature test data of the cryogenic pump and determining the validity of the current test based on the temperature test data. This invention's cryogenic pump testing method makes the gas distribution process more precise through multiple gas distribution modes, and determines the validity of the test data through the temperature test data from the impact test. This transforms the cryogenic pump's pass-through capacity parameter from an experience-dependent process check into a highly reliable, efficient, and reproducible standardized measurement process.

Aspects of the present disclosure describe systems, methods, and structures that implement compact UHV ion trap systems that can operate at temperatures higher than cryogenic temperatures. Ion trap systems according to the present disclosure are surface treated and sealed while held in a UHV environment, with different components joined via UHV seals, such as welded joints, compressible metal flanges, and UHV compatible welded joints. As a result, no cryogenic pumps are needed, thereby enabling a very small volume system.

A hydrogen fueling station includes a hydrogen supply header, a hydrogen pump cylinder, and a hydrogen piston, the hydrogen piston including a piston seal. The hydrogen pump cylinder is configured to receive hydrogen from the hydrogen supply header. The hydrogen piston, the piston seal, and the hydrogen pump cylinder define at least in part a variable working chamber. The hydrogen piston is configured to provide a stroke length of greater than 310 mm.

The present application belongs to the technical field of coal seam permeability improvement in underground coal mine drilling, and provides a coal seam permeability improvement device and method for low-permeability coal seam in underground coal mine by temperature-variable jet flow, which comprises a jet flow nozzle installed at the outlet of a high-pressure water pipe, the inlet of the high-pressure water pipe being connected with a high-pressure water pump, and the high-pressure water pump being connected with a rapid heater; the jet flow nozzle is further connected with a liquid nitrogen generator through a vacuum heat insulation pipe, the inlet end of the liquid nitrogen generator being connected with a nitrogen generator, the outlet end being connected with the inlet end of a liquid nitrogen storage tank, the outlet of the liquid nitrogen storage tank being connected with a liquid nitrogen tank group, the outlet end of the liquid nitrogen tank group being connected with a cryogenic pump, and the outlet of the cryogenic pump being connected with the jet flow nozzle through a vacuum heat insulation pipe; the device effectively increases the fissure size of the drilling, improves the coal seam permeability, and increases the gas production. Meanwhile, a liquid nitrogen production device is used to directly produce liquid nitrogen, which is low in cost and can be reused. The method is simple and easy to operate, can effectively solve the loss of liquid nitrogen in the transportation process, improve the effect of liquid nitrogen on the coal body, and improve the coal seam permeability improvement effect.

The application belongs to the technical field of cryogenic pumps, and particularly relates to a cryogenic pump regeneration heating system and a regeneration heating method. t The state of the cold plate is evaluated according to the condensation layer area and the condensation layer temperature of the cold plate to be treated of the cryogenic pump, and when the cold plate to be treated is in an abnormal state, a cold plate temperature adjustment value C The state of the cold plate is evaluated according to the condensation layer area and the condensation layer temperature of the cold plate to be treated of the cryogenic pump, and when the cold plate to be treated is in an abnormal state, a cold plate temperature adjustment value C The state of the cold plate is evaluated according to the condensation layer area and the condensation layer temperature of the cold plate to be treated of the cryogenic pump, and when the cold plate to be treated is in an abnormal state, a cold plate temperature adjustment value C

A hydrogen fueling station includes a cryogenic pump hydraulic system with two hydraulic cylinders including hydraulic pistons with piston seals separating low pressure portions of the hydraulic cylinders above the piston seals from high pressure portions of the hydraulic cylinders beneath the piston seals. At least one first hydraulic volume source is configured to selectively communicate fluid between the first high pressure portion and the second high pressure portion. A first controllable valve is configured to selectively place the first and second low pressure portion in fluid communication with at least one low-pressure line. A second controllable valve is configured to selectively place at least one second hydraulic volume source in fluid communication with the first high pressure portion. A third controllable valve is configured to selectively place the at least one second hydraulic volume source in fluid communication with the second high pressure portion.

The nitrogen purging device for the low-temperature pump comprises a supporting table, the supporting table is used for containing the low-temperature pump, a nitrogen supply device is arranged on the supporting table, the nitrogen supply device is connected with a gas pipe, the gas pipe is connected with a nitrogen purging ring, and the nitrogen purging ring is movably arranged at the mechanical seal part of the driving end of the low-temperature pump in a sleeving mode. The nitrogen purging ring is used for blowing nitrogen to the driving end mechanical seal part of the low-temperature pump, the supporting table is further provided with a swing mechanism, the swing mechanism is used for driving the nitrogen purging ring to rotate back and forth at the corresponding amplitude, and the low-temperature pump has the advantages that the purging sufficiency of the whole mechanical seal part of the low-temperature pump can be improved, and the freezing risk of the mechanical seal part of the low-temperature pump is reduced.

The present invention relates to the field of research on the flow and heat transfer characteristics of supercritical nitrogen in pipelines, and more particularly to a multifunctional experimental system for studying the flow and heat transfer of supercritical low-temperature nitrogen. The outdoor portion of the supercritical low-temperature nitrogen experimental system includes a liquid nitrogen storage tank for storing liquid nitrogen, a cryogenic pump for pressurizing, a high-pressure vaporizer for vaporizing the liquid nitrogen, a liquid nitrogen thermostat for cooling the nitrogen, a buffer tank for stabilizing pressure and flow, and gas-liquid separation, and a cryogenic and high-pressure pressure reducing valve for regulating outlet pressure, all interconnected by pipelines. The system also includes an automatic control box for controlling electrical components. The indoor portion includes a main regulating valve, a flow meter, a third pressure transmitter, and a third temperature transmitter, all interconnected by pipelines. The experimental system itself can directly provide medium- and low-pressure liquid nitrogen as a cold source for cooling the vaporized nitrogen pipeline, providing a large amount of experimental data support for the development of efficient and compact pre-cooling heat exchangers, and is suitable for widespread promotion.

A piston pump suitable for pumping a fluid at very low temperature, for example hydrogen, is disclosed. The pump has a suction side and a compression side, the suction side comprising an inlet provided for the liquid and intended to connected a liquid supply reservoir external to the pump, a suction chamber for receiving the fluid and a first fluid degassing duct communicating with the suction chamber, the compression side comprising a pump cylinder carrying an assembly for compression and delivery of the liquid, said cylinder comprising a second chamber which communicates with the suction chamber and wherein the fluid at very low temperature circulates in order to cool the compression and delivery assembly.

The invention relates to a piston pump (1) for liquefied gases, such as hydrogen, comprising a degassing gas separation device (4) arranged between the suction chamber (2) and the degassing chamber (3), the separation device (4) comprising a main body (40) comprising at least one through-passage (41) connecting the suction chamber (2) and the degassing chamber (3), and a closing means (42) for closing the passage, the closing means (42) being configured to: - in a closed position (P0), close the passage when the degassing pressure is higher than the suction pressure; - in an open position (P1), open the through-passage (41) when the degassing pressure is lower than or equal to the suction pressure.

The utility model discloses a universal adjustable safe vaporization device for liquefied bulk gas, which belongs to the technical field of vaporization devices and comprises a liquid nitrogen storage tank, one end of the liquid nitrogen storage tank is fixedly connected with a first gas source switch device, and the other end of the liquid nitrogen storage tank is fixedly connected with a second gas source switch device. The end, away from the liquid nitrogen storage tank, of the first gas source switch device is fixedly connected with a second gas source switch device and a vaporizer pipeline, and the face, away from the first gas source switch device, of the vaporizer pipeline is fixedly connected with a detection pipeline used for main pipeline detection. The face, away from the first gas source switch device, of the second gas source switch device is fixedly connected with two sets of temperature safety control devices. The problems that in the process that liquefied gas is conveyed to the vaporizer through a low-temperature pump and the like, the speed and the temperature need to be strictly controlled to prevent overload of the vaporizer, and meanwhile the pressure and the temperature of output gas behind the vaporizer can cause a large amount of influences on used equipment are solved.

A hydrogen fueling station includes a cryogenic pump with a hydrogen piston at least partially positioned within a hydrogen pump cylinder. A variable volume working chamber is defined at least in part by the hydrogen piston, a seal extending around the piston, and an end portion of the hydrogen pump cylinder opposite the first end portion of the first hydrogen pump cylinder. The hydrogen pump cylinder is coupled with a coupler to a thermal decoupling cylinder. The seal provides hydrogen leakage at a first pressure in the variable volume working chamber to an area beneath the seal. A blow by seal mounted to the first coupler provides hydrogen leakage to the thermal decoupling cylinder. A relief valve provides hydrogen leakage out of the thermal decoupling cylinder. The first hydrogen pressure is greater than the second hydrogen pressure, and the second hydrogen pressure is greater than the third hydrogen pressure.

The utility model discloses a pressurized gasification verification pry, and relates to the technical field of hydrogen-oxygen pressurization. The liquid material storage bottle, the low-temperature pump, the air temperature type vaporizer, the water bath type vaporizer and the gaseous material storage tank are mounted on the base and are sequentially communicated through a conveying pipeline; the flame arrester is assembled at the tail end of the blow-down pipe, and the front end of the blow-down pipe is connected to a gas return port of the low-temperature pump, a conveying pipeline at the front end of the blow-down pipe, a conveying pipeline at the rear end of the water bath type vaporizer and a gaseous material storage tank; and the detection mechanism is used for detecting the pressure before and after pressurization of the low-temperature pump, the temperature before and after heating of the air temperature type vaporizer and the water bath type vaporizer and the pressure and temperature of the gaseous material storage tank. A detection mechanism is arranged to detect the pressure before and after pressurization of a low-temperature pump, the temperature before and after heating of a gasifier and the temperature and pressure in a gaseous material storage tank in the hydrogen-oxygen supply system so as to verify the principle of the high-pressure hydrogen / oxygen supply system.

A cryopump (1, fig 1) comprises a vacuum vessel (2, fig 1) with an inlet (3, fig 1) for receiving gas and a refrigeration unit (4, fig 1), which has a cold head (5, fig 1) extending into the vacuum ve

The invention relates to an installation for storing and distributing cryogenic fluid, for example liquid hydrogen, comprising a cryogenic tank (11) buried underground, a liquid withdrawal circuit (20) connected to the tank (11) with a downstream end located above the ground and intended to be connected to a user, the withdrawal circuit (20) comprising, arranged above the ground, a cryogenic pump (2), the installation (1) comprising a pipe (3) for recovering vaporization gases generated within the pump (2) having a downstream end connected to the tank (11), the pipe (3) for recovering the vaporization gases comprising at least one device (8, 9) for regulating the pressure and / or flow rate of the vaporization gas returned to the tank (11), the pressure and / or flow rate regulating device (8, 9) being configured to regulate the pressure within the tank (11) to a pressure level higher than the pressure at the inlet of the pump (2).Abstract figure: Fig. 1.

The utility model relates to the technical field of vacuum equipment, in particular to a vacuum end structure for a low-temperature vacuum pump, which comprises a shell, a baffle, a first cold shield, a second cold shield, a first adsorption array and a second adsorption array, a required vacuum environment can be quickly realized for the low-temperature pump, and the stability of a vacuum state is ensured; by arranging the first cold shield and the second cold shield, namely a multi-stage cold shield structure, the influence of environmental heat radiation on condensation and gas adsorption of the adsorption array structure can be reduced, and the stability of a vacuum state is ensured; the baffle plate is arranged in the cold shield, so that adsorbed gas can be primarily adsorbed and condensed, meanwhile, direct impact of the gas on an adsorption array in the baffle plate can be reduced, and the service life is prolonged; by means of two-stage adsorption of the second adsorption array and the first adsorption array, the effective contact area of gas is increased, the influence of direct radiant heat of the vacuum chamber on the vacuum state is reduced, and the needed vacuum state is rapidly achieved; and meanwhile, assembly is convenient, and machining precision is reduced.

The utility model discloses a regenerator, cryopump and refrigerator, including admission plug, regenerator casing, exhaust plug, said regenerator casing one end is fixedly connected with admission plug, the other end is detachably fixed with exhaust plug, admission plug, regenerator casing, exhaust plug fixed enclosure form the cavity, be equipped with internal packing. According to the utility model, through a detachable connection mode, the quantity, the weight, the type and the like of the filler in the regenerator can be simply adjusted, the regenerator does not need to be reprocessed, and the adjustment of the cooling capacity can be realized.

The application discloses a low-temperature pump with adjustable gas pumping speed, which comprises a pump body assembly, a control assembly and a field generator. The pump body assembly is provided with a pump cavity with a pumping opening. The control assembly is arranged in the pump cavity and comprises a field induction part and a throttling part connected to the field induction part, and the field induction part is connected to the pump body assembly. The field generator is arranged in the pump body assembly and used for emitting a control field to the field induction part. The control field can make the field induction part change shape, and the change of the shape of the field induction part can make the throttling part change position relative to the pump body assembly, so that the fluid flow rate flowing into the pump cavity can be changed. The low-temperature pump can change the fluid flow rate of the pump cavity through the field generator and the field induction part, and has a simple structure.

Cryopump comprising one or more cryopanel structures (20) providing pumping surfaces for the pump. The cryopanel structures are cooled by a refrigerator (30) and there is at least one heating element formed of an electrically conductive track (44) that is mounted on a surface of at least one of the cryopanel structures. An electrically insulating coating is mounted between the cryopanel structures and the electrically conductive track.

A system and method for high rate liquid hydrogen tank filling with minimal vapor losses is provided. The flexible, pump-based filling system can achieve high fill rate of liquid hydrogen in excess of 100 kg per minute and accommodate maximum delivery pressures. The present system and method further includes recovery and re- liquefaction of displaced and flash generated tank vapors. The liquid cryogen filling system comprises a holding tank 20 configured to store liquid cryogen; two or more cryogenic pumps 22, 24 disposed in series arrangement downstream of the holding tank, the two or more cryogenic pumps configured to pressurize a stream of liquid cryogen from the holding tank to form a pressurized liquid cryogen stream; a heat exchanger 25 configured to warm the stream of liquid cryogen via indirect heat exchange against a recycled gaseous cryogen stream to yield a liquid cryogen recycle stream; a target tank 30 disposed downstream of the heat exchanger and configured to receive the warmed, pressurized liquid cryogen stream; a recycle circuit 35 comprising a first conduit 36 configured to direct a saturated vapor cryogen stream from a headspace or overhead of the target tank to the heat exchanger as the recycled gaseous cryogen stream and a second conduit 38 configured to receive the liquid cryogen recycle stream from the heat exchanger; one or more valves 40 disposed in the recycle circuit downstream of the heat exchanger; and a recovery tank 45 disposed downstream of the one or more valves and configured to receive the liquid cryogen recycle stream; wherein a liquid cryogen stream from the recovery tank is recycled.