183 results about "Tank pressure" patented technology

The invention discloses an air distribution device for semiconductor processing and an air supply system thereof. The air distribution device comprises an air distribution block, a plurality of air distribution pipelines communicated with the air distribution block, and automatic pressure control valve assemblies arranged in the air distribution block, wherein the number of the automatic pressure control valve assemblies is the same as that of the air distribution pipelines; an air inlet channel and a plurality of air distribution channels communicated with the tail end of the air inlet channel are arranged in the air distribution block; an automatic pressure control valve assembly is arranged in each gas distribution channel, and the automatic pressure control valve assemblies automatically control the gas distribution opening degree of the gas distribution channels according to the current pressure of the gas distribution channels. The automatic pressure switch valve is arranged in the gas distribution block, the opening degree of each gas distribution channel can be kept consistent, so that the output gas flow is the same, meanwhile, as the automatic pressure switch can adjust the opening degree according to the gas pressure, when the pressure of the gas storage tank is reduced, the injection pressure of the gas outlet can still be kept, and finally the uniformity and high pressure of the gas quantity of each sub-chamber are realized. And the film deposition quality is improved.

The invention provides a device and a method for reducing exhaust loss by using the pressure of a liquid hydrogen storage tank, and relates to the technical field of liquid hydrogen storage and transportation safety. The device comprises an adsorption storage assembly, a desorption recovery assembly and an adsorption enhancement assembly which are arranged in a gas pillow of the liquid hydrogen storage tank. The adsorption and storage assembly is communicated with the air pillow through a one-way mechanical low-temperature valve, is internally provided with a solid adsorption material and a vacuum heat insulation cylinder, and is used for adsorbing and storing evaporation gas and reducing the tank pressure when the tank pressure is increased; the adsorption enhancing assembly comprises a low-temperature hydrogen regulating valve and a low-temperature heat exchanger, and the throttling effect of high-pressure hydrogen in the tank is used for refrigerating an adsorption material, so that the adsorption capacity of the adsorption material is improved; the desorption recovery assembly heats an adsorption material through an intermediate heater, and controllable release of hydrogen is achieved. According to the invention, the active management of the pressure of the liquid hydrogen storage tank and the efficient recovery of the boil-off gas are realized, the exhaust period is obviously prolonged, the hydrogen loss is reduced, and the storage and transportation economy and safety are improved.

The invention discloses a fuel tank pressure sensor, and belongs to the technical field of automobile sensors, the fuel tank pressure sensor comprises a shell, a shell cover, a PCBA circuit unit and a ventilation unit, a monitoring channel is arranged in the shell, two sides of the monitoring channel are provided with communication connectors, the front end of the shell is provided with a wiring harness connector, the PCBA circuit unit is fixed in the shell, and the ventilation unit is fixed in the shell. The shell cover covers the outer shell, the ventilation unit is arranged on the shell cover, the PCBA circuit unit comprises a ceramic substrate and a circuit substrate with an electrical device, a detection hole communicated with a monitoring channel is formed in the outer shell, the ceramic substrate is bonded in the outer shell through a sealant, and the ventilation unit is arranged on the outer shell. The ceramic substrate is provided with a through hole corresponding to the detection hole, the circuit substrate is bonded above the ceramic substrate, and a monitoring chip is packaged in the circuit substrate. The device is high in reliability and low in manufacturing cost, and improves the accuracy and long-term stability of oil tank pressure detection.

The application belongs to the technical field of shield construction, and discloses a method and system for early warning of settlement trend of shield construction crossing a dam; the method comprises the following steps: collecting silt layer geological data before the shield crosses the dam, and analyzing to obtain the distribution range and sensitivity level of the silt layer; collecting the tunneling parameters in real time in units of each ring when the shield machine crosses the silt layer section, and analyzing to obtain the disturbance index; collecting the real-time tunneling speed and the cutter head rotating speed, and recording the shutdown parameters when the complete shutdown condition is met; collecting the slurry tank pressure and the shutdown duration during shutdown, and calculating the pressure data; for the current sensitivity level, the preset hierarchical early warning rule is adopted, the current disturbance index basic threshold is corrected to obtain the corresponding dynamic threshold, the pressure data is compared with the dynamic threshold, and the early warning is issued according to the preset trigger logic classification; and the application improves the safety of shield construction crossing the dam.

The utility model discloses a kind of hot tank exhaust liquefaction structures, including condensate backflow member being fixed on hot tank, steam exhaust pipe being installed on condensate backflow member, condensate backflow member is provided with steam-liquid blending cavity, steam exhaust pipe is provided with the steam passage of intercommunication steam-liquid blending cavity, the inlet end of steam passage is communicated with the inner cavity of hot tank by steam-liquid blending cavity, steam-liquid blending cavity inner wall and steam exhaust pipe outer wall form condensate space, steam converges to form liquid in condensate space inner wall and is backflowed to hot tank by steam-liquid blending cavity. With the effect that hot tank can be effectively pressure-relieved, reduce steam exhaust amount when hot tank pressure-relieved.

The invention provides an oil return pipe mechanism and a compressor. The oil return pipe mechanism comprises an oil return pipe, a supporting column, a spring, an activation valve plate and a fixed valve plate, and the oil return pipe is communicated with an upper support oil pool, a lower support oil pool and a bottom oil pool. The activation valve plate can slide and is initially attached to the fixed valve plate under the elastic force of the spring; when the pressure of the oil pool rises to a set value, the oil pushes and activates the valve plate to overcome the resistance of the spring, a corresponding oil return channel is opened, and redundant oil is guided back to the oil pool at the bottom. The upper support oil return pipe is opened preferentially to maintain the pressure of the backpressure oil groove, and the lower support oil return pipe is opened to further relieve pressure when the rotating speed is increased, so that self-adaptive oil pressure adjustment under different working conditions is achieved, dynamic disc backpressure is stabilized, friction loss is reduced, and operation reliability is improved. The scroll compressor is reasonable in structural layout, low in machining precision requirement, high in oil return efficiency and suitable for scroll compressors with various rotating speed frequencies.

The invention relates to a low-temperature propellant temperature control method based on real-time pressure feedback of a storage tank on a rocket, which comprises the following steps of: acquiring a pressure value, a temperature value and flow of the storage tank in real time to determine whether the pressure value is within a set pressure range; the pressure value of the storage box is adjusted by executing control strategies such as adjusting the temperature set value, and the first set temperature is obtained; when the pressure value is within a set pressure range, determining an optimization target of the state prediction model, inputting the pressure value, the temperature value and the flow into the state prediction model, obtaining a target control variable and a second set temperature of the state prediction model when the optimization target is met, determining a target set temperature according to the first set temperature or the second set temperature, and performing state prediction according to the target set temperature. The target adjustment information including the target set temperature is obtained, and the temperature set value in the filling process is adjusted according to the target adjustment information, so that the low-temperature propellant is always in the optimal temperature state in the filling process, and the filling quality and efficiency are improved.

A closed fuel tank system (1) comprising: a fuel tank (10), a reservoir (20), a vapor channel (61H), a purge channel (62H), a shut-off valve (61), a purge valve (62), a tank pressure sensing unit (47), a lid flap actuating unit (41), a lid locking part (50A), a control unit (70), and a pre-fueling actuating unit (42). The lid locking part (50A) is designed to lock and unlock the lid flap (50) covering a fuel tank opening and unlocks the lid flap (50) when the lid flap actuating unit (42) is actuated by a user and the internal pressure of the fuel tank (10) is less than or equal to a predetermined pressure.The pre-fueling actuation unit (42) is designed to open the shut-off valve (61) to reduce the internal pressure of the fuel tank (10) to less than or equal to the specified pressure when it is actuated prior to actuating the lid flap actuation unit (42).

The application relates to the technical field of pressure detection, in particular to a LNG receiving station tank internal pressure detection system and a detection method, which comprises a pressure detection module and a gas storage tank, and the pressure detection module is arranged on the gas storage tank. The pressure detection module comprises a pipe, a sliding block and a sealing column, a sealing ring is arranged on the pipe, an installation plate is arranged on the pipe, a controller is arranged on the installation plate, and the controller is connected with a pressure gauge. A sliding groove A is arranged on the pipe. The sliding block is arranged in the pipe, two clamping blocks are symmetrically and elastically arranged in the sliding block, an outer thread pipe penetrates through the sliding block and is screw-connected with the sliding block, a driving piece for driving the outer thread pipe to rotate is arranged in the pipe. The sealing column is arranged on the inner side of the installation plate, the sealing column is located in the outer thread pipe, a pressure detection probe is detachably arranged on the inner side of the sealing column, and the pressure detection probe is connected with the controller. The application can realize effective and rapid disassembly, the pressure detection probe can be replaced conveniently and simply in the subsequent replacement, and gas leakage does not occur.

This application relates to a hydraulic brake cylinder pressure control system and its control method. The control system includes a pressure generation module and a pressure control module. The pressure generation module includes a check valve, an external accumulator, and an accumulator sensor. The check valve is connected to an oil tank. The pressure control module includes a proportional solenoid valve connected to the external accumulator and the brake cylinder; a pressure-holding solenoid valve located at the overflow port of the proportional solenoid valve, which is connected to the oil tank via the pressure-holding solenoid valve; a brake cylinder sensor collecting and outputting the brake cylinder pressure; and a brake cylinder pressure switch electrically connected to the brake cylinder sensor. During the relief condition, the proportional solenoid valve is de-energized and the pressure-holding solenoid valve is energized. During coasting or braking conditions, the proportional solenoid valve is energized, and the pressure-holding solenoid valve is de-energized after a delay. This application reduces the usage rate of the proportional solenoid valve and improves system reliability through the coordinated control of the proportional solenoid valve and the pressure-holding solenoid valve.

The invention relates to the technical field of tunnel engineering construction, and provides an in-hole advanced grouting construction method for a large shield to penetrate through a highway roadbed in a long distance, which comprises the following steps of: installing an advanced drilling machine on a shield tunneling machine, and rotating the advanced drilling machine to a specified drilling position; a drill rod of the advanced drilling machine is communicated with the shield advanced grouting pipe in a sealed mode; drilling is conducted through a drill rod of an advanced drilling machine, and when the drill hole reaches the preset depth, first mixed liquid is injected into the drill hole through the grouting pipe and the drill rod; after drilling is completed, retreating type double-slurry grouting is conducted through a grouting pipe, and in the grouting process, the pressure of a slurry bin of the shield tunneling machine is continuously monitored, and an advanced drilling machine drill rod and / or the shield tunneling machine are / is controlled to act till grouting is completed; and after grouting is completed, hole sealing is conducted through second mixed liquid. The water permeability of the stratum can be effectively reduced, a closed shell is formed on the inner wall of the tunnel, and the overall stability of the shield cutterhead side stratum is remarkably improved.

The utility model discloses a test device and a test system, and relates to the technical field of simulation test, the test device is used for an oil pressure sealing test of a fuse, the test device comprises an oil tank, a pressure control module, a temperature control module and a current control module, the oil tank is configured to be communicated with a gas source, and the oil tank is used for accommodating at least part of the fuse; the pressure control module is arranged between the air source and the oil tank and used for controlling the pressure in the oil tank. The temperature control module is arranged in the oil tank and used for controlling the temperature of insulating oil in the oil tank; the current control module is configured to be electrically connected with the power supply and form a current loop with the fuse to control the current passing through the fuse. According to the technical scheme, the pressure control module, the temperature control module and the current control module are arranged to correspondingly control the pressure, temperature and current conditions required in the oil pressure sealing test so as to meet the environment requirements of the oil pressure sealing test of the fuse, and therefore the use working conditions of the fuse under the national standard requirements are simulated.

The application discloses a kind of liquid seal breathing valve and method thereof, including the lower valve seat and upper insertion tube type valve cover of split arrangement;Lower valve seat is provided with the butt flange at lower end, and upper end is set to double sleeve structure;The upper end of double sleeve structure is open, including coaxially arranged inner sleeve, outer sleeve;Upper insertion tube type valve cover includes top cover and the insertion tube installed below top cover;Ball valve and pressure gauge are installed on top cover, and insertion tube is provided with several notches on the pipe wall close to lower end;Insertion tube is inserted between inner sleeve and outer sleeve, until the lower end of insertion tube is directly placed on lower valve seat, and the area surrounded by inner sleeve and outer sleeve is injected with sealing oil.It can be seen from this that the liquid seal breathing valve can realize the function failure of sealing liquid in extreme conditions, and when the upper limit of positive pressure fails to normally release pressure, the upper insertion tube type valve cover can be opened by positive pressure, so as to realize the purpose of releasing tank pressure, so that the liquid seal breathing valve has safety function.

This hydrogen-powered electric vehicle comprises an electric drive unit (11) for driving at least one drive wheel of the vehicle, at least one battery (13) for storing electrical energy, at least one fuel cell module (14), a hydrogen tank (15) for the fuel cell, and a hydrogen circuit (16) connected to the tank. The hydrogen circuit includes a high-pressure section (20) corresponding to the tank pressure. (See Figure 3 for abbreviations.)

The utility model relates to a liquid ammonia spherical tank pressure control device which comprises a pressure reducing pipeline and a pressure supplementing pipeline, the pressure supplementing pipeline comprises a pump inlet pipeline, a delivery pump, an ammonia removal heat exchanger pipeline and a pressure supplementing pipeline which are connected in sequence, a pump backflow pipeline is further connected between the discharging end of the delivery pump and the feeding end of the pump inlet pipeline in parallel, and a pressure supplementing pipeline is further connected between the delivery pump and the feeding end of the pressure supplementing pipeline. The ammonia removal heat exchanger pipeline is also connected with a downstream removal pipeline; a control valve I is arranged at the feeding end of the downstream removal pipeline; the pressure reduction pipeline comprises a pressure reduction feeding pipeline, a control valve II, a one-way valve I, a gas-liquid separator, an ammonia refrigerator unit and a low-temperature liquid ammonia storage tank removal pipeline which are connected in sequence; when the pressure in the liquid ammonia spherical tank is low, the storage pressure in the liquid ammonia spherical tank can be increased through the pressure supplementing pipeline, that is, materials in the liquid ammonia spherical tank are heated through the steam heat exchanger, liquid-phase materials are heated and converted into gas-phase materials, and the gas-phase materials return to the spherical tank, so that the pressurization effect is achieved.

This invention discloses a method for cooling and depressurizing a large LNG storage tank after long-term quiescence, relating to the field of LNG storage tank technology. The method includes the following steps: filling detection, valve detection, spray control, pressure display, pipeline control, temperature and pressure detection, and valve closure. Before resuming LNG transport, this invention uses a pre-cooling pipeline and spray device to pre-cool the LNG storage tank, reducing the temperature and pressure of the top gas phase space. In the early stages of spraying, the pressure of the LNG storage tank tends to decrease. When the tank pressure drops to a certain value, the vaporization of the LNG entering the tank causes the pressure to rise. Before the LNG tank pressure begins to rise, a BOG compressor needs to be started to extract BOG gas from the LNG storage tank. At this time, the pressure of the LNG storage tank is low, and the temperature of the top gas is reduced, thereby achieving control of the tank pressure before resuming transport after a long period of quiescence, and reducing the time required to start the BOG compressor and the amount of BOG gas flare.

The goal is to stabilize the fuel supply to the engine while ensuring the fuel pump operates efficiently. [Solution] The aircraft fuel supply system comprises a fuel pump and an intermediate tank fluidly connected to the engine via a fuel supply passage, a pressure sensor that detects the internal pressure of the intermediate tank or a tank pressure correlated with the internal pressure of the intermediate tank, and a processing circuit that performs intermittent control to control the pump actuator according to the tank pressure. The intermittent control includes controlling the pump actuator to stop the fuel pump when the tank pressure increases and reaches a first threshold, while allowing fuel to be supplied from the intermediate tank to the engine, and controlling the pump actuator to drive the fuel pump when the tank pressure decreases and reaches a second threshold smaller than the first threshold.

This invention relates to the field of dust treatment technology, and discloses a method and apparatus for dust treatment in powder coating production. The method includes: calculating a filter cartridge state coefficient based on the pressure difference inside and outside the filter cartridge and the residual pressure difference after dust removal; calculating a dust load coefficient based on the inlet gas temperature, dust concentration, and humidity of the dust-laden gas; calculating a dust removal capacity matching coefficient based on the pulse valve blowing pressure and air tank pressure recovery time under the current filter cartridge state coefficient and dust load coefficient; calculating a safety risk coefficient based on the instantaneous peak emission concentration and the outlet carbon monoxide concentration; and calculating a target pulse dust removal interval time based on the safety risk coefficient and the dust removal capacity matching coefficient, and adjusting the current pulse dust removal interval time to the target pulse dust removal interval time. This invention achieves dynamic optimization of the dust removal interval through multi-coefficient fusion, taking into account the dust removal effect, operating energy consumption, and safety risks, and significantly improving the intelligence level and operational stability of the dust removal system.

The application discloses a kind of transformer explosion-proof and fault monitoring device and method, belong to electric power equipment technical field.The specific device includes transformer oil tank pressure relief module, on-load tap changer pressure relief module, oil and gas separation tank, gas discharge pipeline, nitrogen injection module, transformer protection control cabinet, oil-immersed cable oil tank pressure relief module and transformer module, specific method includes: collecting transformer data;According to the power factor / loss factor of transformer bushing current collected calculation;Set transformer capacitance, power factor / loss factor and the early warning threshold of partial discharge signal and judge whether data reaches corresponding early warning threshold;Any data reaches early warning threshold in judgment result, determine transformer fault, trigger early warning and carry out transformer pressure relief, realize transformer explosion-proof and fault monitoring.The application realizes the pressure relief protection of transformer cable box, on-load tap changer module and main oil tank, and proposes online monitoring and fault diagnosis of key monitoring signals.

The invention relates to a pressure compensation device (1) for a fuel tank of a fuel system for a vehicle, comprising an assembly (8) comprising a bladder (2) and configured to be positioned inside a tank. According to the invention, the assembly further comprises a support (3) and attachment means (4) for attaching the bladder to the support. The support comprises a wall (3a) having an inner face (3b) and an opening (3c) extending through the wall. The attachment means comprise a first attachment member (4a) secured to the bladder and a second attachment member (4b) fixed to the first attachment member (4a). The first attachment member (4a) comprises a bearing surface (4aa) bearing against the inner face (3b) of the wall (3a) of the support (3) and a receiving surface (4ab) for the second attachment member (4b). The first attachment member (4a) passes through the opening (3c) such that the wall is sandwiched between the second attachment member (4b) and the bearing surface (4aa).

This invention discloses an ultra-high pressure tank valve for hydrogen fuel cell vehicles, comprising a valve body containing a dual-port pressure reducing valve, a balance valve consisting of a throttling valve and a flow-stabilizing and pressure-stabilizing valve, a solenoid valve, a one-way filling valve, an overpressure safety valve, an overheat safety valve, a venting valve, filling and outlet filters, a temperature sensor, and interfaces for tank pressure and output pressure sensors. All components are arranged within the valve body according to design requirements and are connected by corresponding channels within the valve body, featuring high integration, high safety, and high monitoring capabilities. The output pressure can be adjusted according to fuel cell requirements, significantly reducing fluctuations in output pressure and flow rate, thus meeting fuel cell requirements. When the hydrogen storage tank experiences overpressure or overtemperature, the corresponding safety valve activates to release and depressurize the high-pressure hydrogen gas inside the tank, preventing an overpressure explosion. The tank pressure, temperature, and output pressure can be monitored in real time.

A method to increase efficiency in a hydrogen fuel system requiring high pressure hydrogen injection and having a plurality of hydrogen fuel tanks, the method including controlling one or more hydrogen fuel tanks and at least one hydrogen fuel tank to provide fuel in parallel to the hydrogen fuel consumer. The method includes determining when an intermediate tank pressure threshold has been reached in all hydrogen fuel tanks. The method includes responsive to the intermediate tank pressure threshold being reached in all of the hydrogen fuel tanks, removing the at least one hydrogen fuel tank from providing fuel to the hydrogen fuel consumer while using one or more hydrogen fuel tanks to provide hydrogen fuel to the fuel consumer. The method includes when an engine brake event has been detected, pumping hydrogen from the one or more hydrogen fuel tanks into the at least one hydrogen fuel tank.

A fuel supply system for an aircraft according to the present invention comprises: an intermediate tank which is fluidly connected to a fuel pump and an engine via a fuel supply path; a pressure sensor which detects the internal pressure of the intermediate tank or a tank pressure that is correlated with the internal pressure of the intermediate tank; and a processing circuit which executes intermittent control for controlling a pump actuator in accordance with the tank pressure. The intermittent control includes: when the tank pressure increases and reaches a first threshold value, controlling the pump actuator to stop the fuel pump in a state where supply of a fuel to the engine from the intermediate tank is allowed; and when the tank pressure decreases and reaches a second threshold value which is lower than the first threshold value, controlling the pump actuator to drive the fuel pump.

The utility model discloses a transformer monitoring system and a transformer, relates to the transformer technical field, the transformer monitoring system comprises a pressure relief valve and a monitoring device, the pressure relief valve is installed on the oil tank of the transformer, the pressure relief valve is provided with a cavity communicated with the oil tank, a pressure sensor communicated with the cavity is mounted on the pressure relief valve; the monitoring device comprises a main body, an acquisition card and a display screen electrically connected with the acquisition card; the main body is detachably installed on the oil tank and avoids the position of the pressure relief valve, an installation space is defined by the main body, the acquisition card is installed in the installation space, a wire harness channel is formed in the main body, a wire harness connecting the acquisition card and the pressure sensor penetrates through the wire harness channel, and the display screen is arranged on the side, away from the oil tank, of the main body. Compared with a traditional pressure relief valve, the transformer monitoring system acquires the pressure condition of the oil tank through the pressure sensor and analyzes the pressure through the acquisition card, the pressure condition of the oil tank can be mastered in time, and the transformer monitoring system is more reliable.

The application discloses a nuclear power device control system and method coupled with a heat pipe reactor and an sCO2 Brayton cycle, including a rotating shaft rotating speed control system and method, which maintains the rotating shaft rotating speed constant by adjusting the working medium flow entering the turbine, so as to ensure the power supply quality of the whole system; a compressor inlet temperature and inlet pressure control system and method, which respectively maintains the compressor inlet temperature and inlet pressure constant by adjusting the seawater flow and the pressure tank pressure, so as to ensure that the temperature and density of the working medium at the compressor inlet are in a supercritical state; and an intermediate heat exchanger outlet temperature control system and method, which adjusts the reactor power by controlling the core reactivity, and then maintains the intermediate heat exchanger outlet temperature constant. The application can provide a reference for the control system design of a high-efficiency compact nuclear power device coupled with a heat pipe reactor and a supercritical carbon dioxide Brayton cycle.

In a carbon dioxide measuring system, a discharge mass acquisition unit determines the mass of liquefied carbon dioxide stored in a tank on the basis of the detection results of a liquid level meter for detecting the liquid level in the tank, a tank thermometer for detecting the temperature in the tank, and a tank pressure meter for detecting the pressure in the tank. The discharge mass acquisition unit finds the mass of liquefied carbon dioxide liquefied by the liquefaction unit and sent to the tank through the first piping system on the basis of the detection result of the first flow meter. The discharge mass acquisition unit acquires the mass of the liquefied carbon dioxide discharged from the tank on the basis of the determined mass of the liquefied carbon dioxide stored in the tank and the mass of the liquefied carbon dioxide fed into the tank through the first piping system.

A hatch cover includes spring-loaded exhaust and suction valves to regulate internal tank pressure with respect to outside pressure. The valves are disposed in a ring housing. The cover further includes a spring-loaded locking bolt configured to engage the hatch base and thereby provide a retaining force between the housing and the hatch base. The exhaust-valve springs may be selectively preloaded to establish a target exhaust pressure. The locking-bolt spring may be selectively disengaged or overcome to release engagement of the bolt from the hatch base.

The invention discloses a steel plate for a lightweight mobile tank pressure vessel. The steel plate is characterized by comprising the following chemical components in percentage by mass: 0.15 to 0.19 percent of C, 0.20 to 0.40 percent of Si, 1.40 to 1.70 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, 0.40 to 0.70 percent of Ni, 0.015 to 0.035 percent of Nb, 0.15 to 0.20 percent of V, 0.012 to 0.018 percent of N and the balance of Fe and inevitable impurities. The production method comprises the steps of smelting, continuous casting, high-temperature heating, rolling and heat treatment, the carbon steel plate for the pressure vessel can meet the requirements that the transverse impact at-40 DEG C in the delivery state and the PWHT state is larger than or equal to 60 / 60 J, the yield strength is larger than or equal to 460 MPa, the tensile strength is 630-730 MPa, and the ductility is larger than or equal to 18%, and the market competitiveness of the steel plate for the south steel mobile tank pressure vessel is greatly improved.

The invention relates to the technical field of water electrolysis hydrogen production and power electronic control, and provides an electrolytic bath gas production rate and rear end pressure synchronous control method and system based on current fluctuation, equipment and a readable storage medium, the method comprises the following steps: collecting output parameters of a rectification power supply to an electrolytic bath, and calculating current change based on the output parameters; collecting pressure parameters of the electrolytic cell, and obtaining a pressure error; calculating the current gas production based on the output parameters and an electrolytic cell gas production model, and calculating the gas production change according to the current change; and generating an advance pressure regulation instruction based on the current fluctuation threshold, wherein the final pressure feedback control quantity is jointly composed of a feed-forward pressure regulation quantity and a pressure feedback control quantity. Therefore, synchronous adjustment of the rear-end pressure adjusting device is achieved, pressure control lag is restrained, and the pressure stability and the response speed of the system under the strong fluctuation working condition are improved.

The three-electromagnetic-valve series-parallel connection redundancy pressure increasing and supplementing system comprises a high-pressure gas cylinder set, a pressurizing filter, a first main path pressurizing electromagnetic valve, a second main path pressurizing electromagnetic valve, a main path pore plate, an auxiliary path pressurizing electromagnetic valve, an auxiliary path pore plate, a comprehensive controller, a box pressure sensor and a storage box. Through the series-parallel connection design of the pressure increasing and supplementing electromagnetic valves and the differential setting of main and auxiliary path control pressure bands and starting control time, the pressure increasing and supplementing mode that the main path works preferentially and the auxiliary path works standby is achieved, and the one-degree single-point fault mode that the pressure increasing and supplementing electromagnetic valves cannot be opened or closed is avoided; the reliability, compactness and economical efficiency of the rocket tank pressure increasing and supplementing system are improved, and compared with traditional pressure increasing and supplementing schemes such as a single pressure increasing circuit and a parallel pressure increasing circuit, the pressure increasing and supplementing system has higher fault adaptability.