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1690 results about "System pressure" patented technology

Loader vehicle control method and system, computer equipment and storage medium

The invention relates to the technical field of intelligent vehicle control, in particular to a loader vehicle control method and system, computer equipment and a storage medium. The method comprises the following steps: collecting multi-modal data of the loader, wherein the multi-modal data comprises working environment data, dynamic load state data and vehicle attitude data of the loader; constructing a three-dimensional operation scene digital twinborn model based on the multi-modal data, and predicting vehicle stability influence data of the influence of the load change on the vehicle stability based on the dynamic load state data; based on the digital twinborn model of the three-dimensional operation scene and the vehicle stability influence data, a dynamic control strategy is generated by utilizing a reinforcement learning algorithm, and cooperative actions of steering, lifting and walking mechanisms are synchronously optimized; according to operation environment data and a dynamic control strategy, hydraulic system pressure and motor torque distribution are adjusted in a self-adaptive mode, and operation efficiency and safety are ensured.
Owner:QINGZHOU YINGNUO HEAVY IND MASCH CO LTD

Real-time intelligent shield attitude control method based on machine learning

The invention belongs to the field of intelligent control systems, and particularly relates to a shield attitude real-time intelligent control method based on machine learning, according to the method, a data acquisition module can more comprehensively and accurately reflect the actual condition of shield construction, and in the control process, key parameters such as the working state of a jack and the pressure of a hydraulic system are monitored in real time, so that the control accuracy is improved. Abnormal conditions can be found in time, an emergency plan can be started, and the safety of shield construction is guaranteed. According to the real-time monitoring and feedback optimization mechanism, the safety and reliability of shield construction are effectively improved, and the construction risk is reduced.
Owner:STATE KEY LAB OF SHIELD & TUNNELING TECH

Immersed liquid cooling energy storage battery box

The invention discloses an immersed liquid cooling energy storage battery box, and belongs to the technical field of outdoor integrated cabinets. The box body assembly comprises a box body and a cover plate covering the top of the box body, a baffle is arranged at the bottom of the box body, the baffle is arranged in a guide groove, a liquid inlet is formed in the bottom end of the end of the box body, and a liquid outlet is formed in the top end of the end of the box body; the battery assembly comprises a battery module which is arranged on the baffle and is composed of a plurality of battery cells, overflow runners are formed among the battery cells through isolation pads, and the guide grooves are communicated with the overflow runners; cooling liquid enters from the liquid inlet, is shunted to the overflow flow channel through the guide groove and flows between the bottom of the box body and the battery cell; the cooling liquid adopted by the invention is an insulating cooling liquid, the PACK adopts a totally-closed pressure-bearing design, the system pressure can meet 0.2 mPa, negative pressure vacuumizing liquid injection is performed, a reasonable flow channel is constructed, the cooling liquid heat dissipation capability is improved, the front and rear temperatures of the battery cell are basically consistent, and the temperature rise of the battery cell is reduced.
Owner:CHANGZHOU BORI ELECTRIC POWER AUTOMATION EQUIP +2

Ash removal monitoring method, device and system for bag type dust collector and medium

The invention discloses an ash removal monitoring method, device and system for a bag type dust collector and a medium. The method comprises the following steps: acquiring lifting valve time sequence data, pulse valve time sequence data and bag type dust collector system pressure difference of each box chamber of the bag type dust collector in an offline ash removal mode; based on the time sequence data of the lifting valve and the time sequence data of the pulse valve, determining an injection period, selecting differential pressure data of a bag type dust collector system in the injection period, and performing preprocessing; performing correlation analysis on the preprocessed differential pressure of the bag type dust collector system and the time sequence data of the lifting valve to obtain a change rule of the differential pressure of the bag type dust collector system along with the working of the lifting valve under a normal dust cleaning working condition; and based on the change rule, judging the dust removal effectiveness of the current box chamber. According to the method, the ash removal effectiveness of each box chamber of the bag type dust collector can be accurately monitored, so that which box chamber is abnormal in ash removal can be accurately monitored, the fault box chamber can be quickly and accurately found, and the operation and maintenance efficiency of the bag type dust collector is improved.
Owner:XIECHANG ENVIRONMENTAL PROTECTION TECH CO LTD

Thermal behavior experiment system and method for narrow rectangular channel under reflooding cooling condition

The invention provides a thermal behavior experiment system and method under a narrow rectangular channel reflooding cooling condition. The system comprises a heating water storage tank, a nitrogen tank, a steam tank, a shield pump, a preheating section, a first direct-current power supply, a second direct-current power supply, a narrow rectangular channel test section, a steam-water separator, a surge tank, a flow control valve, a silencer and an electromagnetic valve. The experimental working medium is deionized water, and re-submerging cooling experiments under different system pressures, working medium supercooling degrees, heating wall surface heat flux densities, working medium submerging speeds, heating wall surface initial temperatures and channel interior initial liquid levels can be carried out on an experimental section of a narrow rectangular channel structure. The device is suitable for narrow rectangular channel structures with different sizes, and can be used for carrying out re-submerging experiments on experiment sections with single-plate double-channel, double-plate three-channel and more channels. The system pressure and the inlet flow in the submerging process can be kept stable, and it can be ensured that the supercooling degree of a working medium, the heating wall surface temperature and the initial liquid level are controllable.
Owner:CHONGQING UNIV

Control method of turning plate unloading platform

The invention discloses a control method of a flap unloading platform, which is applied to a hydraulic control system of the flap unloading platform, and comprises the following steps: acquiring a starting signal, and enabling a power driving branch based on the starting signal; the system pressure of a hydraulic control system of the turning plate unloading platform is controlled by the power driving branch to be gradually increased; in response to the fact that the system pressure is equal to the preset value, the power-on state of the main electromagnetic valve is changed, the first proportional throttle valve and the second proportional throttle valve are adjusted based on the second working state of the main electromagnetic valve, the first lifting oil cylinder and the second lifting oil cylinder are controlled to act, and the turning plate unloading platform is driven to rotate; and in response to rotation of the flap unloading platform to the preset angle, the power-on state of the main electromagnetic valve is changed, so that the flap unloading platform is controlled to stop rotating based on the first working state of the main electromagnetic valve. By controlling the first proportional throttle valve and the second proportional throttle valve which are independent, independent control over the first lifting oil cylinder and the second lifting oil cylinder is achieved so that synchronous action can be achieved.
Owner:DONGGUAN CITY DACHENG MASCH EQUIP MFG CO LTD

Ventilation valve control system with pressure regulation function for generator set

The invention relates to the field of control systems, and discloses a vent valve control system with a pressure regulation function for a generator set, which is used for breaking through the limitation of static state, single target and passive response of a traditional vent valve control method. Comprising the following steps: acquiring pressure, flow velocity and valve opening data of a ventilation system in real time, generating a dimensionless parameter set for dynamic calibration, integrating parameter uncertainty disturbance terms to form a hybrid prediction model, solving an optimal valve opening instruction sequence by adopting a multi-target robust optimization algorithm, and designing a layered safety control mechanism. The system safety is guaranteed through dual-threshold monitoring and emergency intervention, redundant sensor data fusion and parameter reverse optimization are introduced, and fault tolerance and model self-adaption are achieved. According to the method, through collaborative innovation of dynamic modeling, robust optimization and intelligent fault tolerance, the control precision, the anti-interference capability, the safety and the reliability of the ventilation system of the generator set are remarkably improved, and the method is suitable for complex and changeable industrial operation scenes.
Owner:JIANGXI DATANG INT XINYU NO 2 POWER GENERATION CO LTD

Variable-speed variable-displacement electro-hydraulic power source control method and hydraulic system

The invention relates to the technical field of hydraulic transmission, and provides a variable-speed variable-displacement electro-hydraulic power source control method and a hydraulic system.The method comprises the specific steps that the system pressure and the system flow at the current moment are obtained; the initial rotating speed of the servo motor at the current moment is detected, and the initial displacement of the two-way variable pump at the current moment is obtained; a genetic algorithm is used for obtaining the optimal displacement of the two-way variable pump and the optimal rotating speed of the servo motor; the servo motor is adjusted according to the optimal rotating speed of the servo motor, so that the two-way variable pump works at the combination point of the optimal displacement and the optimal rotating speed; and during the working period of the two-way variable pump, the steps are cyclically executed to realize real-time regulation and control of the electro-hydraulic power source. According to the method, the efficiency model and the dynamic response model of the electro-hydraulic power source are established, the intelligent optimization algorithm is used for conducting multi-target dynamic optimization on the efficiency and the response time of the electro-hydraulic power source, the rotating speed of the servo motor and the displacement of the two-way variable pump are controlled in a coordinated mode, and the electro-hydraulic power source works in a high-efficiency and high-response area.
Owner:JILIN UNIVERSITY +1

Method and device for measuring Joule-Thomson coefficient of hydrocarbon fuel and cracking product thereof

PendingCN119310133Aavoid measuringavoid predictionMaterial heat developmentFuel testingSystem pressureHydrocarbon
The invention discloses a method for measuring Joule-Thomson coefficients of hydrocarbon fuel and cracking products thereof. The method comprises the following steps: pumping a target substance into an experimental tube, and heating from room temperature to target temperature; monitoring the temperature of the target substance at the inlet and outlet of the experiment tube, the wall surface temperature distribution of the experiment tube, the system pressure at two ends of the experiment tube, and current and voltage applied to two ends of the experiment tube in real time; according to the parameters monitored in real time, a function H (T) of the constant-pressure enthalpy value of the target substance changing along with the temperature is obtained on line based on a calorimetric model; when cooling to room temperature, changing the pressure and continuing the steps to obtain H (T) under different pressures; and based on H (T) under different pressures, establishing a Joule-Thomson coefficient calculation model containing a pressure-temperature-constant pressure enthalpy value function relationship, and calculating the change condition of the Joule-Thomson coefficient of the target substance along with the temperature. The invention further discloses a corresponding measuring device. According to the method and the device, accurate measurement of the Joule-Thomson coefficient is realized.
Owner:ZHEJIANG UNIV

Vulcanizing machine steam condensate drainage data integrated management system and management method

The invention relates to the technical field of data analysis, in particular to a comprehensive management system and management method for steam condensate drainage data of a vulcanizing machine. According to the comprehensive management system and method, a generative adversarial network is adopted to calculate the steam flowing node correlation degree, analyze the condensate drainage valve opening and closing influence, construct a steam hydrophobic topology network and establish a flow distribution model, and temperature gradient changes are combined; the method comprises the following steps: acquiring a steam condensate drainage state mapping structure, enhancing the global analysis capability of a condensate drainage system, analyzing steam load balance by adopting a long-short-term memory network, predicting steam supply demands, forming a steam condensate drainage intelligent regulation and control strategy, calculating pressure abnormal deviation, analyzing a steam leakage rate, predicting a steam loss trend, and detecting an abnormal switch state of an electromagnetic valve. The system stability is improved, and the energy loss is reduced by extracting the blockage characteristics of the condensate drain valve, evaluating the pressure loss of the system, improving the fault prediction capability, adjusting the opening and closing states of the electromagnetic valve and correcting the control instruction of the condensate drain valve according to the steam condensate drain intelligent regulation and control strategy and the condensate drain abnormal characteristic analysis result.
Owner:GUIZHOU TIRE

Cooling pressure cooker

An embodiment of the present disclosure provides a pressure cooker including: a housing; a pressure pot; and a cooling system. The pressure pot is disposed in the housing. The cooling system is thermally coupled to the pressure pot to cool the pressure pot.
Owner:THE STEELSTONE GRP LLC

Method for analyzing and predicting pneumatic conveying airflow nonlinear signal based on machine learning

The invention relates to a method for analyzing and predicting a pneumatic conveying airflow nonlinear signal based on machine learning, which adopts a method of combining nonlinear dynamic analysis and machine learning in a pneumatic conveying system, and the nonlinear dynamic analysis method can perform nonlinear dynamic feature extraction on an electric signal acquired and converted by an acoustic emission sensor. The recurrent neural network can process sequence data, can capture dynamic characteristics in a time sequence, and uses data collected by the acoustic emission sensor as a main analysis object to predict and analyze important parameters such as the conveying solid-gas ratio and the system pressure drop in the pneumatic conveying system; and proper operation parameters under the optimization target needing to be achieved are determined through dynamic optimization of the parameters, so that the conveying system intelligently and finely controls the air flow and the fluctuation range of the high-pressure air flow, the conveying energy consumption and the fluctuation quantity of the air flow are reduced, and it is guaranteed that the conveying system is in the optimal working state.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER

Agricultural machinery working condition prediction and adaptive control method based on multi-sensor fusion

The invention provides an agricultural machinery working condition prediction and adaptive control method based on multi-sensor fusion, and relates to the technical field of agricultural machinery working condition prediction, and the method comprises the steps: constructing a working condition data stack, and caching mechanical operation data and surrounding environment data collected by a multi-source sensor according to a time sequence; preprocessing the working condition data to obtain a standardized feature matrix, inputting the standardized feature matrix into the working condition prediction model, and outputting a predicted working condition parameter set; calculating a predicted working condition adaptation degree coefficient to represent the matching degree of the predicted working condition and the ideal working state; inputting the predicted working condition parameter set and the adaptation degree coefficient into a multi-objective optimization controller, and iteratively solving an adaptive control parameter set through a dynamic inertia weight particle swarm optimization algorithm in combination with operation safety requirements; and the self-adaptive control parameter set is issued to an agricultural mechanical execution mechanism, and cooperative regulation and control of the target advancing speed, the driving power and the hydraulic system pressure are achieved, so that the mechanical operation state is optimized, and closed-loop feedback control is formed.
Owner:JILIN UNIVERSITY

High-precision positioning control method and system for servo electro-hydraulic actuator

The invention belongs to the technical field of hydraulic transmission and control, and discloses a high-precision positioning control method and system of a servo electro-hydraulic actuator. Real-time operation parameters of a servo electro-hydraulic actuator under different working frequencies are obtained, a servo valve dynamic return difference characteristic curve is constructed, a return difference characteristic change mode is extracted, and a dynamic influence model of return difference characteristic change on positioning precision is established. Based on the model, a frequency self-adaptive compensation strategy is designed in combination with a pressure fluctuation value of a hydraulic system, and real-time correction of a servo valve control signal is achieved. According to the method, a differentiation strategy combining low-frequency feed-forward compensation and high-frequency feedback compensation is innovatively adopted, a smooth transition mechanism is designed, and the problem that the positioning precision fluctuates under the frequency change working condition in a traditional control method is solved. According to the invention, high-precision positioning control of the servo electro-hydraulic actuator in a full frequency band range is realized, and the positioning precision and stability of the system under a dynamic working condition are improved.
Owner:沈阳华卓控制技术有限公司

CO2-oil near-miscible phase pressure acquisition system and method based on convective mixing

The invention discloses a CO2-oil near-miscible phase pressure acquisition system and method based on convective mixing, and belongs to the field of CO2 oil displacement. The system comprises a high-temperature and high-pressure reaction kettle, a temperature and pressure control system, a gas injection module, a liquid injection module and a monitoring control module. According to the method, the oil phase and the carbon dioxide are induced to form a convective mixing effect by dynamically regulating and controlling the injection flow rate, and when no interface of the system reaches a mutual convective mass transfer state, the system pressure corresponding to a phase interface disappearance critical point is directly recorded as a near-miscible-phase pressure value. The near-miscible pressure value obtained by the method is high in accuracy, the single test time is shortened to 1 hour, the test period is remarkably shortened, near-miscible pressure parameters under different temperature conditions can be measured in a short time, the CO2-oil near-miscible pressure can be measured by simulating a high-temperature and high-pressure environment of a stratum, and the method is suitable for popularization and application. And high-timeliness key phase state data support is provided for unconventional oil and gas reservoir development.
Owner:XINJIANG UNIVERSITY

Electrically-driven metering pump load-sensitive system, control method and engineering machinery

The invention relates to the technical field of engineering machinery, and particularly discloses an electrically-driven metering pump load-sensitive system, a control method and engineering machinery, the electrically-driven metering pump load-sensitive system comprises a control unit, a driving motor assembly, a metering pump, a pilot hydraulic control unit, a pilot handle assembly, a load-sensitive valve assembly, an actuator assembly, a sensor assembly and a pressure difference control module; the driving motor drives the metering pump to supply oil to the load-sensitive valve assembly so as to drive the actuator assembly to operate; the control unit receives the maximum outlet pressure and the maximum load pressure of the pump collected by the pressure sensor, receives a system target pressure difference signal of the pressure difference control module at the same time, and synchronously controls the rotating speed of the motor and the valve target pressure difference output by the proportional pressure reducing valve. The system aims to solve the problems that a traditional upstream compensation load sensitive system lacks a flow saturation resisting function, and a downstream compensation load sensitive system has extra reversing energy consumption and fixed system pressure difference setting.
Owner:HUAQIAO UNIVERSITY

Efficient sealing valve used in high-pressure environment

The invention discloses an efficient sealing valve in a high-pressure environment, and relates to the technical field of sealing valves. Comprising a main body, a filter plate is fixed in the main body, a cleaning assembly driven by a motor is arranged on one side of the filter plate, an opening and closing assembly is arranged at the bottom of the cleaning assembly, a blocking assembly is arranged in a limiting frame, and the blocking assembly is rotationally connected with a first blocking plate and a second blocking plate. According to the device, a second bevel gear rotates to drive a connecting shaft to rotate, then a first fixing rod and a second fixing rod are driven to move in cavities formed in the two sides of the interior of a connecting frame, and therefore a rotating shaft and a rotating ring are driven to rotate; the first blocking plate and the second blocking plate rotate to block the residual oil sample, so that the effect of preventing the residual oil sample from slowly seeping out of the nozzle due to the release of system pressure or the action of self gravity after the valve is closed is achieved.
Owner:QUANZHOU INST OF INFORMATION ENG +1

Rock dynamic splitting combined monitoring equipment and method

The invention discloses rock dynamic splitting combined monitoring equipment and a rock dynamic splitting combined monitoring method, relates to the technical field of rock dynamic testing, and is used for solving the problems of single and one-sided monitoring result and low accuracy caused by the fact that a single monitoring means, such as ultrasonic monitoring and pressure monitoring, is usually adopted for monitoring in a dynamic mechanical testing process. According to the main technical scheme, the rock dynamic splitting combined monitoring equipment comprises a pressure loading system, the pressure loading system comprises a containing space, the containing space is used for containing a sample, and the pressure loading system is used for providing dynamic impact for the sample and generating impact information; the combined monitoring device comprises a deformation detection piece, and the deformation detection piece is used for being in contact with the sample so as to generate deformation information of the sample under dynamic impact; and the image monitoring system is used for generating image information of the sample under the dynamic impact. The device is mainly used for rock dynamics testing.
Owner:NORTHEASTERN UNIV CHINA

Intelligent towing cone system for test flight calibration

The invention belongs to the technical field of aircraft atmospheric data measurement equipment, and particularly relates to an intelligent towing cone system for test flight calibration, which is used for calibrating flight parameters such as height and speed output by an aircraft atmospheric data system and providing a parameter correction basis. The dragging cone system comprises a static pressure tube, a tail cone body, an optical fiber sensor, a dragging structure and an optical fiber sensing analyzer. According to the invention, the length of the pressure gas circuit of the towed cone system can be shortened, the problem of pressure delay in the existing towed cone product can be solved, the real-time continuous measurement of the pressure of the towed cone system is realized, the dynamic flight calibration of atmospheric parameters is realized, and the test flight calibration efficiency is improved.
Owner:TAIYUAN AERO INSTR

Full-automatic centralized cutting fluid supply control method and system

The invention discloses a cutting fluid full-automatic centralized liquid supply control method and system, cutting fluid concentration data and liquid supply system pressure data are obtained through a sensor array, real-time monitoring data are generated by adopting a high-frequency sampling technology, and if the cutting fluid concentration data deviates from a preset threshold range or the liquid supply system pressure data exceeds a stable range, the cutting fluid is monitored. If so, generating an abnormal signal; according to the abnormal signal, the operation frequency of a liquid supply pump is adjusted through a proportional-integral-differential algorithm, a closed-loop control system is formed to maintain a target pressure value, and meanwhile the opening value of a liquid distribution valve is adjusted according to the concentration deviation signal; and the cutting fluid return liquid is extracted from the adjusted liquid supply system, the cutting fluid return liquid is treated through a multi-stage filtering device and a centrifugal separation device, and if it is detected that the impurity content of the cutting fluid return liquid is lower than a preset threshold value, it is judged that purification treatment is completed. The stable performance of the cutting fluid can be kept, the service life of equipment is prolonged, the processing quality and the production efficiency are improved, and the cutting fluid has important practical value.
Owner:ZHUZHOU SIXING MACHINERY

Negative pressure two-phase liquid cooling system based on thin film evaporation

The invention discloses a negative-pressure two-phase liquid cooling system based on film evaporation, which belongs to the technical field of two-phase liquid cooling, and comprises a closed negative-pressure heat dissipation module, a condensation filtering module, a liquid storage and supply module, a monitoring module, a vacuum pump and a controller, and is used for creating a vacuum environment for a whole loop; the output end of the closed negative pressure heat dissipation module is connected with the input end of the condensation filtering module, the output end of the condensation filtering module is connected with the input end of the liquid storage and supply module, the output end of the liquid storage and supply module is connected with one end of a three-way ball valve, and the other two connectors of the three-way ball valve are connected with the vacuum pump and the input end of the closed negative pressure heat dissipation module respectively. The invention solves the problems that the critical heat flux density is not high enough in the current common cold plate liquid cooling technology; the problem that the reliability of the system is reduced due to the fluctuation of the system pressure and the flow of the cooling working medium caused by the disordered growth of boiling bubbles of the cooling working medium under the high heat flow density can be solved.
Owner:XI AN JIAOTONG UNIV

Methods and systems for starting up and operating one or more vapor-recompression units

A method for starting up vapor-recompression units comprises: providing a vapor recompression sub-system comprising one or more vapor-recompression units, wherein the vapor recompression sub-system has a vapor inlet and a compressed-vapor outlet; providing a means of reducing vapor density through pressure reduction in vapor communication with the vapor recompression sub-system; reducing pressure within the vapor recompression sub-system to reach a sub-system pressure selected from 0.1 kPa to 1000 kPa; introducing a vapor mass flow to the vapor recompression sub-system at a restricted vapor mass flow rate; starting up the vapor recompression sub-system while maintaining the restricted vapor mass flow rate for a start-up time period; and then, following the start-up time period, introducing additional vapor mass flow to the vapor recompression sub-system to reach a full vapor mass flow rate. The restricted vapor mass flow rate is from 0.1% to 90% of the full vapor mass flow rate.
Owner:ENERGY INTEGRATION INC

Emulsion pump station frequency conversion control system and application method thereof

PendingCN119572472AImprove liquid supply efficiencyreduce consumptionMining devicesPump controlAutomatic controlSystem pressure
The invention relates to the technical field of electro-hydraulic control, and discloses an emulsion pump station frequency conversion control system which comprises an emulsion pump station, a pump station initialization subsystem, a fault detection subsystem, a pressure sensor, a controller, a frequency conversion device, an emulsion pump station switching subsystem, an emulsion pressure setting subsystem and an emulsion main pipeline. The invention further provides an application method of the emulsion pump station frequency conversion control system. The application method comprises the following steps that S1, a program is initialized; the emulsion supply efficiency of the fully mechanized coal mining face of the coal mine can be improved, the liquid supply pressure can be stabilized, the power consumption in the liquid supply system can be reduced, the service life of frequency conversion control system equipment of the emulsion pump station can be prolonged, automatic control of the emulsion pump station can be realized, the labor cost can be reduced, and the working efficiency and reliability can be improved; unnecessary property loss is reduced, and important technical guarantee is provided for efficient and safe production of the coal industry and stable development of the coal industry.
Owner:WUXI WEISHUN COAL MINE MASCH CO LTD

Stepped pressure relief device, system and method for hydraulic system of aviation ground support equipment

The invention discloses an aviation ground support equipment hydraulic system step pressure relief device, system and method, which comprises a pressure transmitter, pressure relief stop valve groups and an overflow valve, an integrated mounting block is of a rectangular structure, the pressure transmitter is arranged on one side of the integrated mounting block, the pressure relief stop valve groups are arranged at the upper end and the lower end of the integrated mounting block, and the overflow valve is arranged on the integrated mounting block. The overflow valve is arranged on the adjacent side of the pressure transmitter, the integrated mounting block is provided with an oil supply port and an oil return port, the oil supply port and the pressure transmitter are arranged on the same side, and the oil return port is arranged on the opposite side of the oil supply port; according to the stepped pressure relief method, a medium flowing channel is formed in an integrated mounting block, a pressure transmitter, a pressure relief stop valve set and an overflow valve are communicated through the integrated mounting block, the system pressure is quickly relieved to zero step by step in a two-stage pressure relief mode during pressure relief, the pressure relief time is short, and on the premise that the pressure relief time is not obviously prolonged, the pressure relief efficiency is greatly improved. And the pressure of the hydraulic system is quickly and safely released to zero, so that the influence on the safe operation of the aircraft hydraulic system is prevented.
Owner:LINKSILICON INNOVATION PTE

Intelligent control method for ship electric control valve actuator

The present invention discloses an intelligent control method for an electric control valve actuator for a ship. The present invention pre-processes and comprehensively evaluates the collected fluid pressure data at a ship control center, first calculates the pressure evaluation value within a set time period, then matches it with a preset range interval to obtain a pressure index, and combines it with an ideal pressure index corresponding to the operating condition, so that the valve opening adjustment can better adapt to the host's requirements for changes in fuel pressure under different working conditions. At the same time, for a gradually rising or falling pressure state, the pressure change rate is calculated and the state interval is divided, and the pressure change index is calculated in combination with weight coefficients of different intervals. The opening optimization value and the adjustment direction are determined according to the pressure change index and a preset index value range, thereby achieving precise control, being able to respond in a timely manner to changes in the operating conditions of the ship's main engine and fluctuations in the pressure of the fuel system, effectively ensuring a stable supply of fuel flow and pressure, and improving the operating efficiency and stability of the ship's main engine.
Owner:WENZHOU HELI AUTOMATION INSTR CO LTD

Circulating water variable flow energy-saving system based on resistance coefficient optimization

The embodiment of the utility model discloses a circulating water variable-flow energy-saving system based on resistance coefficient optimization. The circulating water variable-flow energy-saving system comprises a variable-flow energy-saving control system, cold and heat source equipment, end equipment, a bypass regulating valve, a circulating water pump, a frequency converter connected with the circulating water pump, a differential pressure sensor, a flow meter, a water supply temperature sensor and a return water temperature sensor. The embodiment provided by the utility model has the beneficial effects that the resistance coefficient and the pressure difference set value are dynamically adjusted according to the flow and the temperature difference change in the operation process, the pressure difference of the system is optimized in real time, the supply and demand consistency of the operation of the system is ensured, and the energy consumption is reduced; the circulating water flow is controlled through variable flow regulation, the reaction is sensitive, and the adverse effect of hysteresis of conventional temperature difference regulation is eliminated; and the comfort of the user and the energy-saving performance of the system are both considered.
Owner:深圳市善隆科技有限公司

Supercritical fluid assisted polymer devolatilization distributor

The invention discloses a supercritical fluid assisted polymer devolatilization distributor. The supercritical fluid assisted polymer devolatilization distributor comprises a gradually-shrinking channel, a throttling channel and a gradually-expanding channel which are connected in sequence. A static mixer is arranged in the throttling channel, the upstream pressure is maintained to be above a supercritical state by increasing fluid resistance, meanwhile, the mixing effect of supercritical fluid and polymer melt is enhanced, stable and uniform foam flow is formed, and pressure fluctuation is avoided; an automatic pressure relief valve assembly is arranged on the upper portion of the divergent channel and composed of a valve opening, a valve cover plate, a spring, an adjusting knob and the like, when the system pressure exceeds a set value, exhaust is automatically started, and controllable pressure relief is achieved. A plurality of rows of flow distribution holes are formed in the lower part of the distributor to ensure that the melt uniformly flows out to form stable melt strips; the problems that traditional equipment is difficult to pressurize and not timely in pressure relief are solved, the supercritical state maintenance, gas-liquid separation and melt forming processes are optimized, the volatile component removal efficiency is improved, the phenomenon that melt strips are broken or accumulated is effectively prevented, and continuous and stable operation of the devolatilization process is guaranteed.
Owner:EAST CHINA UNIV OF SCI & TECH

Gas storage integrated operation model construction method and system based on digital-intelligent twinning

The invention discloses a gas storage integrated operation model construction method and system based on digital and intelligent twinning, and relates to the field of gas storage integrated operation model construction, and the method comprises the steps: constructing a single well IPR and VLP curve; a mode of combining forward pressure regulation and reverse pressure regulation is adopted, a pressure value set of all nodes after pressure stabilization is output, and a preliminary pressure steady-state scheme is formed; an economic value evaluation index function is constructed, and the total daily operation cost of the system under the given gas production rate is evaluated; a comprehensive optimization model based on a neural network is constructed, and injection-production quantity reference values of all wells and target values of all nodes are output; and verifying the stability of the comprehensive optimization model based on the neural network according to the output injection-production quantity reference values of all wells and the target values of all the nodes. The method has the advantages that the physical law of gas storage injection and production, the system pressure balance and the economical efficiency target are deeply fused, and a fast and reliable closed loop from pressure steady-state optimization to an economical optimal decision is achieved.
Owner:ZHONGKE HUIZHI (BEIJING) TECH CO LTD

Steam flash explosion control system, method and device

The invention relates to the technical field of intelligent control, and particularly discloses a steam explosion control system, method and device, and the system comprises an obtaining setting module which is used for obtaining material parameters, determining a material processing demand based on a real-time application scene, determining an initial control strategy through combining with the material parameters, and obtaining initial control parameters; the stage control module is used for monitoring system pressure in real time based on a preset sensor so as to judge a pressure control stage, and parameter optimization of the corresponding stage is carried out to obtain a first control parameter; the monitoring and evaluation module is used for monitoring material parameters in real time and comparing the material parameters with material processing requirements so as to obtain a comprehensive evaluation result; the processing optimization module is used for judging intelligent control performance based on the comprehensive evaluation result and performing adaptive adjustment on the first control parameter; the control rhythm of the system can be processed more accurately, evaluation and adjustment are carried out, the control accuracy and stability of the system are greatly improved, and meanwhile the energy consumption of the system is effectively optimized.
Owner:XINJIANG HONGYIRUN BIOTECHNOLOGY CO LTD

Quick plug connector of liquid cooling pipeline

The invention provides a quick connector for a liquid cooling pipeline. The quick connector comprises a male connector assembly and a female connector assembly, wherein the female joint assembly comprises a female joint main body and a locking sleeve, the locking sleeve is axially and slidably arranged on the female joint main body in a sleeving manner, and a locking mechanism formed by a plurality of limiting steel columns which can move in the radial direction in an annular array manner is arranged in the female joint main body; the male connector assembly comprises a male connector body, and an annular locking groove matched with the limiting steel column is formed in the outer surface wall of the insertion end of the male connector body. The inner wall of the locking sleeve acts on the limiting steel column through a sliding sleeve, the limiting steel column is adopted to replace a steel ball, the contact mode of a locking part is changed into linear contact or small-area surface contact from point contact, the stress area is increased, the contact pressure is remarkably reduced, abrasion and plastic deformation are effectively restrained, and the service life of the locking sleeve is prolonged. The connector can bear more frequent plugging and pulling and stronger system pressure impact and vibration, and the service life is greatly prolonged.
Owner:JIAXING MASTER PLUMBING