2106results about "Fluid handling accessories" patented technology

The invention discloses a liquid cargo containment system and a maintenance method, and belongs to the technical field of natural gas storage, the liquid cargo containment system comprises a main shielding layer, a secondary shielding layer, an insulating layer and a detection pipeline, one end of the detection pipeline is connected with a gas input pipeline, the other end of the detection pipeline is provided with a first branch pipe and a second branch pipe, and the first branch pipe extends between the main shielding layer and the secondary shielding layer; the first branch pipe extends into the insulating layer, the second branch pipe extends into the insulating layer, a first temperature monitoring unit is arranged in the first branch pipe, a second temperature monitoring unit is arranged in the second branch pipe, and a first pressure difference detection unit is further arranged between the first branch pipe and the second branch pipe. Through dual monitoring of the peripheral temperature and pressure of the thin film tank, accurate monitoring of the liquid cargo leakage condition is ensured, and the problem that the liquid cargo leakage condition is misreported due to pressure fluctuation caused by other factors in a conventional monitoring mode is solved.

The invention relates to an industrial gas tank storage place early warning method and system. The method comprises the following steps: acquiring image time sequence data at least representing temperature field distribution of a target monitoring area, generating a temperature image sequence, determining area temperature change characteristics and tank body surface reflection characteristics in the area, and generating reflection area probability distribution of the target monitoring area to determine initial gas leakage probability data of the target monitoring area; generating baseline feature data at least representing background thermal field distribution of the target monitoring area; and performing association processing on the initial gas leakage probability data and the baseline feature data to generate fusion time sequence features and determine a gas leakage diffusion weight so as to correct the initial gas leakage probability data to obtain corrected gas leakage probability data. By adopting the method, the gas leakage probability can be accurately judged by comprehensively utilizing temperature field time sequence information, tank body surface reflection characteristics and background thermal field distribution characteristics under the condition of a complex background thermal field, so that early warning is realized.

A fluid storage and supply device comprising a cryogenic reservoir for storing liquefied fluid, a withdrawing circuit comprising a first withdrawing pipe having a first upstream end connected to the upper part of the reservoir and a second downstream end intended to be connected to a user member, the first withdrawing pipe comprising a first heating heat exchanger situated outside the reservoir and a second heating heat exchanger situated inside the reservoir, the withdrawing circuit comprising a set of valve(s) configured to ensure the passage of a flow of fluid circulating from the first end towards the second end by passing through the first heat exchanger and then through the second heat exchanger or by passing solely through the first heat exchanger without passing through the second heat exchanger, characterized in that the device further comprises a system for pressurizing the reservoir comprising a pressurizing pipe separate from the withdrawing circuit and comprising two ends respectively connected to the upper and lower parts of the reservoir, a vaporizing heat exchanger and a set of valve(s) configured to allow the withdrawal of liquid from the reservoir, the heating thereof in the vaporizing heat exchanger and the reintroduction thereof into the reservoir.

An underground storage system for storing fluid includes a hole having a bottom, a support element including at least one opening able to receive a joining element, at least one reservoir having a longitudinal axis, a bottom end and a top end, a first closure able to close the reservoir at its bottom end, and a second closure able to close the reservoir at its top end. The top end is able to be joined to the support element via the joining element such that the reservoir is hung inside the hole and such that an axial clearance able to absorb axial thermal expansion of the reservoir remains between the first closure and the bottom.

The present disclosure provides systems and methods for monitoring for a stuck valve. Various temperature and pressure sensors are used to monitor for a stuck valve in one or more tanks of hydrogen gas.

A liquid cryogen stored in a liquid cryogen space of a closed insulated cryogenic storage vessel is subcooled by allowing it to enter into a conduit disposed in the liquid cryogen space where it is expanded by a pressure reducer in the conduit, thereby producing a cooled biphasic mixture of the cryogen in liquid and vaporized forms. The cooled biphasic mixture has a temperature lower than that of the liquid cryogen in the liquid cryogen space. Heat is transferred across the conduit from the liquid cryogen in the liquid cryogen space to the cooled biphasic mixture.

The invention discloses a storage tank pressurization control method and system based on LNG gas station fuzzy self-adaptive PID control, and aims to solve the technical problems that a traditional pressurization control method of an LNG storage tank is low in control precision, poor in stability and rapid in equipment abrasion. According to the control method, dynamic compensation for the target pressure is introduced, so that the system can aim at a more accurate control target in the initial stage, the steady-state control deviation is reduced, and the control precision is improved. And static pressure head change disturbance caused by liquid level change is overcome through dynamic compensation, the adjusting burden of the controller is reduced, the controller can focus on processing other dynamic disturbance, and therefore the control process is more stable, and overshoot is smaller. Through the design of a dynamic compensation mechanism and a special fuzzy rule base, the system can automatically adapt to various complex working conditions, and fast, stable and overshoot-free pressure control is always kept. Therefore, frequent and large-amplitude action and surge phenomena of the valve are avoided, and the energy consumption of an executing mechanism is reduced.

An outlet assembly for hybrid pressure and flow regulation includes a first orifice of a first size, a second orifice of a second size that is larger than the first size, and a mechanism that automatically moves the first orifice between a first position, a second position, and a third position. When the first orifice is in the first position, the flow of gas passes through the first orifice, which regulates a flow rate of the flow of gas through the second orifice. When the first orifice is in the second position, the flow of gas primarily bypasses the first orifice and flows through the second orifice with a first specific flow rate. When the first orifice is in the third position, the flow of gas primarily bypasses the first orifice and flows through the second orifice with a second specific flow rate.

The invention relates to the technical field of data processing, and discloses an intelligent arrangement, storage, tracking, management and control method and system for sulfur hexafluoride gas cylinders. The method comprises the following steps: performing leakage risk assessment through a sulfur hexafluoride concentration sensor and a gas cylinder pressure monitoring device to obtain an environmental risk data set; performing multi-dimensional state sensing on the gas cylinder according to the intelligent label and the inclination angle sensor to obtain a dynamic state information set of the gas cylinder; performing path optimization through a multi-target search algorithm to obtain a multi-target path cost matrix; performing Pareto optimal solution screening through a leading edge set maintenance mechanism to obtain an optimal scheduling path set; and tracking the life cycle of the gas cylinder based on the state machine model to obtain full life cycle tracking data. The problems of intelligent scheduling optimization and full-life-cycle tracking management and control under the multi-target constraint condition in sulfur hexafluoride gas cylinder storage management are solved.

The invention relates to a system for storing liquid hydrogen and for distributing gaseous hydrogen, comprising a source of liquid hydrogen (20), at least two gaseous hydrogen tanks (31-35) to be filled and a transfer device comprising: a transfer unit (25) configured to transfer liquid hydrogen from the hydrogen source (20) to any of the tanks, a vapour compressor (10) having a first upstream end and a second downstream end fluidly connected to each of the tanks, a set of valves (51-55), a control device configured to issue a command to transfer the liquid hydrogen and to open and / or close one or more valves (51-55), the compressor (10) being arranged so as to transfer vapours created during filling from any tank to each of the other tanks in succession, by compressing the vapors to a pressure greater than the pressure in the tank during filling.

The invention discloses a solid-gas coupling hydrogen storage system and a flow and pressure coordinated regulation and control method thereof. The system comprises a gaseous hydrogen storage tank, a solid hydrogen storage tank, a hydrogen coupling regulation and control device, a hydrogen buffer tank, a solid hydrogen storage thermal management system, a high-pressure proportional valve, a low-pressure proportional valve, a three-way valve and a hydrogen storage valve. The gaseous hydrogen storage tank is connected with the hydrogen coupling regulation and control device through a pipeline, and high-pressure hydrogen is conveyed to the high-pressure inlet end of the hydrogen coupling regulation and control device. The low-pressure inlet end of the hydrogen coupling regulation and control device is connected with the solid hydrogen storage tank through a pipeline, and the outlet end of the hydrogen coupling regulation and control device is connected with the hydrogen buffer tank through a pipeline; and the pipelines of the gaseous hydrogen storage tank and the solid hydrogen storage tank are simultaneously connected with the three-way valve. According to the system, efficient and safe hydrogen storage and supply are achieved through the synergistic effect of all the components, and reliable technical innovation and support are provided for hydrogen energy application.

A hydrogen gas supply apparatus according to one aspect of the present invention includes a compressor configured to compress hydrogen gas and supply the hydrogen gas compressed to a pressure accumulator which accumulates the hydrogen gas, an adsorption column disposed between the discharge port of the compressor and the pressure accumulator, and configured to include an adsorbent for adsorbing impurities in the hydrogen gas discharged from the compressor, and a plurality of valves disposed at the gas inlet / outlet port side of the adsorption column, being at a discharge port side of the compressor, and configured to be able to seal the adsorption column, wherein the space in the adsorption column is sealed using the plurality of valves such that the inside of the adsorption column is maintained to have a high pressure by the hydrogen gas compressed in the case where the compressor is stopped.

The invention relates to the technical field of Internet of Things sensing, in particular to a medical oxygen storage and distribution method and system based on the Internet of Things. The method comprises the following steps: acquiring use process data of the recycled medical oxygen storage container; analyzing a pressure decline curve and a use frequency mode of each container when oxygen is taken by using the use process data, and establishing use behavior characteristics; comparing the stability differences of the use behavior characteristics of different containers to obtain container stability grading data; counting accumulated use times and load intensity change of each container according to the container stability grading data; calculating a fatigue cumulative value of each container based on the cumulative number of uses and the load intensity change; and combining the fatigue accumulated value with the container stability grading data to evaluate the container reliability, and generating a container reliability sorting table. According to the invention, by analyzing the use behavior characteristics and the fatigue accumulation value of the container, the container with potential risk can be identified.

The invention relates to a method for determining a maximum flow rate setpoint for emptying a pressurised gas tank for a mobile or stationary apparatus with a view to controlling the temperature of the tank during the emptying thereof, the determination method comprising the following steps: - measuring the temperature outside the tank and providing a value (Te) for the temperature measured outside the tank, - measuring the temperature inside the tank and providing a value (Ti) for the temperature measured inside the tank, - measuring the pressure inside the tank and providing a value (Pi) for the pressure measured inside the tank.

The invention relates to the technical field of hydrogen energy storage and transportation, and discloses a hydrogen storage system convenient for hydrogen charging and discharging regulation, comprising: a gas input module comprising a gas discharging column unit, a buffer tank and a connecting unit, the gas discharging column unit being connected with a tube bundle vehicle by using a ferrule type quick joint, a compression module comprising a first hydrogen compressor unit and a second hydrogen compressor unit, the second hydrogen compressor unit adopts a water-cooling diaphragm structure, the hydrogen storage module comprises a first hydrogen storage bottle group unit and a second hydrogen storage bottle group unit, and the second hydrogen storage bottle group unit is divided into three-stage storage, a gas distribution and control module, a safety guarantee module, a monitoring module and an auxiliary module. Through a gas discharging column double-path parallel interface of the gas input module and the temperature compensation type pressure gauge, and in combination with a check valve and a rupture disk of the buffer tank, the damage of high-pressure impact to equipment is avoided, so that the equipment is prevented from being damaged by the high-pressure impact, and the service life of the equipment is further prolonged.

The invention relates to a cryogenic fluid transfer device comprising a first tank storing a cryogenic fluid, a second cryogenic receiving tank, a fluid transfer circuit connecting the tanks and comprising a first pipe that connects the upper parts of the first and second tanks and has a first valve, a second pipe that connects the lower part of the first tank to the second cryogenic tank and has a pump, the pump and the first valve being configured to place the upper parts of the first and second tanks in fluidic communication, the first pipe comprising a bypass portion equipped with a heater and a set of one or more valves configured to make it possible to modify the temperature of the flow of gas transferred from the second cryogenic tank to the first tank via the first pipe.

A pressure regulating device includes an on-board storage tank, a mixing chamber, first and second lines, a recirculation line, a pressure sensor and a controller. The storage tank stores and supplies cryogenic fuel to a combustion chamber and includes a booster pump. The first line supplies cryogenic fuel in the liquid state and includes a pressurizing pump and a first regulation valve. The second line supplies cryogenic fuel in the gaseous state and includes a compressor and a first control valve. The recirculation line includes a second regulation valve and with a first heat exchanger. The pressure sensor detects the pressure inside the storage tank. The controller receives the pressure and controls the first and second regulation valves, the first control valve, the pressurizing pump, the booster pump and the compressor, as a function of a value of a setpoint pressure inside the storage tank.

The invention discloses a safety monitoring system and monitoring method for a hydrogen storage device, and relates to the technical field of hydrogen storage, and the system comprises an energy supply module which supplies power to a data collection device through an intelligent power management system; the data acquisition module is used for collecting real-time operation data from a sensor of the hydrogen storage device; the intelligent analysis module is used for performing real-time analysis on the collected data based on a machine learning algorithm, establishing a safety risk assessment model and obtaining a risk development trend; the early warning control module is used for judging whether abnormity occurs or not based on the risk development trend; and the remote monitoring module communicates with the subsystems through a network and provides remote data monitoring. According to the method, key data of the hydrogen storage device are collected in real time, intelligent analysis is conducted through machine learning, environment changes are monitored in real time, safety risks are recognized in advance, leakage and pressure anomalies are recognized through deep learning and an anomaly detection algorithm, the risk development trend is predicted, and safe operation of equipment is guaranteed.

A control system for a fuel cell electric vehicle (FCEV) includes a controller that is configured to control a fuel delivery system to release fuel via an injector with a selected fuel tank valve among a plurality of fuel tank valves controlled to be in an open state and with the other fuel tank valves controlled to be in a closed state. The control is further configured to cause a corrective action in response to a fuel characteristic indicating the selected fuel tank valve is stuck closed.

The invention relates to the technical field of gas filling, and discloses a multi-component high-precision gas filling system which comprises a data module used for obtaining the residual gas content, the environment temperature and humidity and the filled gas pressure of the gas filling system, a collaboration module used for receiving the residual gas content, establishing a component interaction matrix and obtaining the component interaction matrix. The cross reaction amount of the residual gas and the newly-filled gas is calculated, the environment temperature and humidity are received, an environment compensation matrix is established, the cleaning effect weight is output through the environment compensation matrix, the gas filling efficiency is obtained by receiving the filled gas pressure in real time through an effect matrix, and the system health weight is output; the pollution module receives the cross reaction amount, the cleaning effect weight and the system health weight to establish a pollution model, the pollution model outputs and predicts the pollution amount of the gas filling system, the predicted pollution amount is input into the execution module, and the adjustment and optimization module is used for dynamically adjusting the component interaction matrix, the environment compensation matrix and the efficacy matrix; and pollution caused by multi-group gas filling is reduced.

The invention provides aero-engine hydrogen doping experimental equipment based on integration of hydrogen production, hydrogen storage and hydrogen supply, which belongs to the technical field of combustion engine control and comprises an experiment generating device, a hydrogen supply device and a control system. The experiment generation device comprises an engine to be experimented; the hydrogen supply device comprises a support unit, a hydrogen production unit, a hydrogen storage unit and a hydrogen supply unit. The hydrogen production unit is used for producing hydrogen; the hydrogen storage unit is communicated with the hydrogen production unit and the hydrogen supply unit and is used for storing and conveying hydrogen; the hydrogen supply unit is used for supplying hydrogen to the engine; a moving unit is arranged at the bottom of the bracket unit and is suitable for driving the hydrogen supply device to move; wherein the hydrogen storage unit comprises a first detection piece, and the first detection piece is suitable for detecting the hydrogen storage pressure of the hydrogen storage unit; the control system is connected with the hydrogen supply device so as to control the hydrogen supply device to operate according to the detection result of the first detection piece. According to the invention, limitation of a laboratory can be broken through, and experiment safety and convenience are improved.

The invention relates to the technical field of hydrogen energy storage, in particular to an underground hydrogen storage system, which is characterized in that a hydrogen storage sensing module and a processing module are integrated in the system, a multi-input multi-output monitoring channel is constructed by using array type electrode nodes, and the processing module constructs a dual-drive prediction model through superposition of a physical state space and a neural network to obtain reference hybrid prediction output; generating a virtual sample set by using random sampling to construct a dynamic random tolerance envelope band; and finally, leakage is judged according to the permeability of the envelope band according to the actually measured signal. According to the invention, the problem of high false alarm rate of the system due to the fact that in-pipe nonlinear background triboelectric charge noise covers tiny leakage characteristics under a fluctuating power supply charging working condition is effectively solved; millisecond-level self-adaptive accurate diagnosis of the air tightness of the pipeline in a complex dynamic environment is realized, and the detection capability of weak leakage signals is remarkably improved while electromagnetic interference is filtered out.

The invention discloses a composite material double-cavity air reservoir and a vehicle, and belongs to the technical field of air reservoirs. The composite material double-cavity air storage cylinder comprises a composite material protection structure, a partition plate and two inner containers, and the inner containers are made of plastic and provided with containing cavities used for storing air. The partition plate is arranged between the two inner containers, annular protruding parts are arranged on the two sides of the partition plate in the circumferential direction, and sealing end cover parts are arranged at the ends, away from the partition plate, of the inner containers. The inner container and the partition plate are wrapped with the composite material protection structure, the composite material protection structure comprises two sets of circumferential winding layers and two sets of oblique opposite-pulling winding layers, the circumferential winding layers are wound on the outer circumferential wall of the inner container, one ends of the oblique opposite-pulling winding layers are wound on the annular protruding part, and the other ends of the oblique opposite-pulling winding layers are wound on the sealing end cover part of the inner container. When pressure difference exists between the two inner containers, the risk of extrusion damage can be eliminated.

The invention relates to the field of natural gas industry, in particular to a marine LNG filling system and a filling method.The marine LNG filling system comprises a storage system, a filling system, a monitoring system and a data acquisition system, the storage system is used for storing liquefied natural gas, and the filling system is used for filling a fuel cabin of a ship with the liquefied natural gas; the monitoring system is used for controlling the filling process; and the data acquisition system is used for acquiring environmental data of a filling area and data of the filling system to provide a judgment reference for the monitoring system. By adopting the technical scheme, the environmental data and the filling system data acquired by the data acquisition system provide a judgment reference for the monitoring system, so that the intelligent degree of the monitoring system is greatly improved, and the problem that the monitoring system cannot respond in time due to sudden environmental change is avoided.

The invention relates to the technical field of high-pressure hydrogen storage of hydrogen fuel cell automobiles, and provides a high-pressure hydrogen storage bottle opening combination valve with a streamline runner and a control method. The combination valve integrates a high-pressure stop valve, a two-way flow regulating valve, a filter and a pressure / temperature / flow sensor, an air supply channel, an air inflation channel, a discharge channel and a cooling channel are designed, and the air supply channel and the air inflation channel are provided with a common rail type channel. A pilot-operated pressure reducing valve and a main runner bidirectional flow regulating valve are additionally arranged on the gas supply channel to form a two-stage pressure reducing system, so that the pressure and flow of hydrogen at an outlet are effectively limited, and the hydrogen is safely conveyed to a fuel cell; a redundant one-way valve is additionally arranged on an inflation channel to achieve rapid filling. Flow resistance and turbulent flow dissipation are remarkably reduced through a streamline channel, a sealing interface is reduced through modular integration, actuation response and power density are improved, and safety and stability of pressure reduction gas supply and high-pressure filling working conditions, intrinsic safety of the system and reliability of the whole life cycle are ensured.

The invention provides a pressure stabilization control method, device, equipment and medium for a compressed carbon dioxide energy storage system, relates to the technical field of compressed energy storage, is applied to the compressed carbon dioxide energy storage system, and comprises a high-pressure gas storage unit with a carbon dioxide pipeline at the bottom end and a liquid pump; the method comprises the following steps: acquiring state data of a high-pressure gas storage unit at an initial moment, and determining thermodynamic parameters at the initial moment according to the state data at the initial moment; according to the thermodynamic parameters and the state data at the initial moment, thermodynamic parameters and state data at the next moment are determined, the thermodynamic parameters and the state data at the moment serve as initial parameters and state data at the next moment to be subjected to iterative calculation, and thermodynamic parameters at each moment and state data at each moment are obtained; and according to the thermodynamic parameters and the state data of each moment, generating a thermodynamic change curve, and according to the thermodynamic change curve, performing frequency conversion control on the operation of the liquid pump. The energy utilization efficiency can be improved.

The present invention discloses a liquid hydrogen pressurization and refueling system synergistically driven by power and heat, at its core is a cascaded cryogenic and high-pressure vessel group, which achieves staged pressurization of liquid hydrogen to 80-100 MPa by combining reciprocating liquid hydrogen pump pressurization and equal-capacity thermal compression using cryogenic and high-pressure vessels, the filling of a vehicle-mounted storage tank occurs through these cascaded vessels; the pressurization and filling processes are closely integrated, with hydrogen flow in the filling process serving as a heat-transfer medium. Efficient in-tank thermal compression of the cryogenic and high-pressure vessels is achieved without additional driving force. Based on the combination of efficient low-pressure compression using the liquid hydrogen pump and high-pressure thermal compression without power consumption, the present invention fully utilized liquid hydrogen cooling capacity to replace the high pump power consumption typically required in the traditional pressurization process; and a cascaded storage tank is combined to reduce the exergy loss in the filling process, resulting in low-energy-consumption continuous filling of the liquid hydrogen refueling station.

The invention relates to a storage cryostat (2) for liquid helium (7), suitable for transferring liquid helium (7) from the storage cryostat (2) into an application cryostat (3), wherein the storage cryostat (2) comprises: - a vacuum-insulated helium vessel (6) for liquid helium (7), the helium vessel (6) having a vertical height HHB that can be filled with liquid helium (7), - a transfer line (4) for liquid helium (7), having an inlet opening (20) which opens into a lower region of the helium vessel (6), in particular into a lower fifth of the helium vessel (6), and - a convection-suppression system (9) which is arranged within the helium vessel (6) and impedes vertical convection of liquid helium (7) in the helium vessel (6), characterised in that the convection-suppression system (9) is formed in the helium vessel (6) over a height interval (IKS) with a vertical height HKS, where HKS ≥ 0.50 × HHB, and in that the convection-suppression system (9) impedes the vertical convection of liquid helium (7) in the helium vessel (6) over the region of the height interval (IKS) of the convection-suppression system (9). The invention provides a storage cryostat that enables simple and rapid transfer of liquid helium from the storage cryostat into the application cryostat, with minimised helium losses.

According to the carbon dioxide oil displacement tank capable of automatically adjusting the pressure, during daily storage, the change speed and amplitude of the pressure in the tank are maximum, so that the stability of equipment can be influenced, an air bag is arranged in a third air cavity, and when the pressure in the third air cavity changes, the air bag is closed, so that the stability of the equipment is improved. The air bag can be matched with the third electric valve and the second electric valve to release or suck air so as to adjust pressure change, the speed and amplitude of the pressure change are slowed down to be within a controllable range, and therefore the stability of air stored in the device is improved, the interior of the tank body is divided into three storage units, and the storage effect is good. The third air cavity, the second air cavity and the first air cavity are sequentially arranged from inside to outside, when the first air cavity leaks, the third air cavity and the second air cavity are in a closed state and do not leak with the first air cavity at the same time, the capacity of the first air cavity is the minimum, the capacity of the third air cavity is the maximum, and if the first air cavity leaks, the loss can be reduced to the minimum. Therefore, the safety of the device can be improved.

The invention discloses a natural gas storage tank safety monitoring system based on multi-sensor feedback, which belongs to the technical field of storage tank operation monitoring and comprises a monitoring platform, a monitoring point identification module, a parameter monitoring module, an operation performance analysis module, a verification judgment module, a risk trend evaluation module and an early warning module. According to the method, multiple types of sensors work cooperatively, storage tank performance index parameters are collected in real time for anomaly detection, whether the operation state of the natural gas storage tank meets the safety requirement or not is preliminarily judged, and when judgment does not meet the safety requirement, fusion verification and judgment are conducted on whether a leakage fault occurs or not by combining monitoring sequences of all the parameters; and when it is judged that a leakage fault occurs, on the basis of a time sequence, a leakage source is obtained through space-time correlation analysis of gas concentration and temperature, cross validation of multi-source sensing data and a layer-by-layer progressive analysis mode are adopted, and real-time evaluation and danger accurate positioning are effectively carried out on the overall state of the storage tank.