646 results about "Water hammer" patented technology

The invention discloses a post-pumping air tank robustness collaborative design method considering hydraulic parameter time-varying characteristics, which comprises the following steps: defining a hydraulic parameter uncertainty fluctuation interval of a water delivery system in a full life cycle, and setting a body structure decision variable range of a post-pumping air tank; performing combined sampling in the water conservancy parameter uncertainty fluctuation interval and the body structure decision variable range by using a test design method to generate an initial sample set; performing steady-state and transient-state coupling simulation on the initial sample set, constructing a constant-flow operation condition of the water delivery system by using a hydraulic equation, updating a water pump working point and pipeline pressure distribution, performing transient simulation by using a characteristic line method to obtain a hydraulic response index, and training to obtain a water hammer response agent model; constructing a robustness optimization objective function based on failure probability constraint; and performing global optimization on the target function by using an intelligent optimization algorithm, calling the water hammer response agent model to perform random simulation, evaluating a failure probability, and outputting a target design scheme.

The invention discloses an underground pipe network monitoring method and system, and relates to the technical field of underground pipe network monitoring, and the method comprises the steps: arranging pressure sensors and flowmeters at key nodes of an underground pipe network, and collecting the pressure time sequence data and flow time sequence data of each node; calculating the hydraulic impedance of each pipe section according to the pressure time sequence data and the flow time sequence data, and constructing a hydraulic impedance space-time field covering a pipe network topology and a time dimension; extracting a space change trend and a time change trend based on the hydraulic impedance space-time field, fusing to generate a space-time gradient anomaly index, identifying a primary leakage suspicious pipe section according to the index, and forming a primary leakage alarm event; the method comprises the following steps: determining water hammer wave propagation characteristics in combination with a topological structure of an underground pipe network and pipe section physical attributes, performing water hammer wave propagation rule consistency verification on a plurality of alarm events by using time and position information of a primary leakage alarm event, and screening out an effective leakage event cluster conforming to physical propagation logic.

The invention relates to the field of fluid pipeline system safety and intelligent control, and provides a water hammer pressure prediction and active suppression method and system. The method comprises the following steps: acquiring a multi-dimensional digital signal flow, and generating a window data matrix sequence through sliding window segmentation and dimensionless; image coding is carried out to form a spatiotemporal feature sequence, the spatiotemporal feature sequence is processed by a double-branch spatiotemporal prediction network, and a prediction feature spectrum sequence is output and decoded to form a prediction waveform matrix; future risk indexes and morphological characteristics are extracted and spliced with the multi-dimensional digital signal flow to form a prediction enhancement state vector, and the prediction enhancement state vector is input into a strategy network to generate valve action control parameters; and a target valve opening curve is decoded, a composite control signal is obtained through feedforward-feedback composite control, actual response data flow and historical data packaging are collected, and a prediction network and a strategy network are updated online through mixed priority screening. According to the method, prospective and self-adaptive water hammer prediction and active suppression are realized, the pressure evolution trend of a pipeline system is informed, and decision support is provided for safe operation of a fluid pipe network.

The invention belongs to the technical field of data processing, and particularly relates to an intelligent analysis method and system for valve performance test data, and the method comprises the steps: constructing a dynamic sensitivity factor capable of reflecting the system stability through analyzing the change rate of a flow time sequence and the fluctuation of a current time sequence, and generating a fatigue factor in combination with a pressure range; further, an abnormal pressure peak value caused by the water hammer effect is identified and quantified, and a fatigue factor is corrected to obtain a degradation acceleration factor which can better reflect real physical wear; finally, the composite dynamic features and the traditional static features are jointly input into a GBDT model for training, so that early failure symptoms can be captured, and the accuracy and reliability of prediction of the remaining service life of the valve are improved.

The invention provides a shale gas well inter-well pressure channeling identification method, system, device and medium, the shale gas well inter-well pressure channeling identification method comprises the following steps: carrying out well test analysis in a pump stop pressure drop stage after fracturing, and collecting data; the bottom hole pressure is calculated, and pressure data oscillation caused by the water hammer effect is eliminated; drawing a pressure difference and pressure difference derivative double logarithmic curve based on the bottom hole pressure data; establishing a shale gas well non-uniform fracture multi-zone coupling well test seepage model; the model parameters are adjusted, a pressure difference and pressure difference derivative double logarithmic curve is fitted, and when the model result is close to the drawn pressure difference and pressure difference derivative double logarithmic curve, the crack parameters of the model parameters are obtained through inversion; judging whether the crack parameter is too high or not; and determining the relationship between the child well group and the mother well group, analyzing the pressure difference and pressure difference derivative curve morphological characteristics of the fracture parameter high section, and judging whether pressure channeling occurs or not. The system can realize the method. According to the method, the inter-well pressure channeling identification efficiency in the well group synchronous fracturing period can be improved.

The utility model relates to the technical field of regulating valves, and discloses a self-operated high-pressure-difference regulating valve which comprises a pipeline assembly and a buffer assembly installed in the pipeline assembly, the pipeline assembly is fixedly installed on the two sides of a valve assembly, a transmission assembly is fixedly installed on the valve assembly, a feedback assembly is fixedly installed on the transmission assembly, and when equipment operates, the buffer assembly is fixedly installed on the pipeline assembly. Water flow passes through the water pipe and flows into the valve assembly, in the process, the liquid baffle is driven by high pressure to rotate and deviate inwards along the rotating rod, meanwhile, the liquid baffle is driven to rebound to the original position under the rebound effect of the rebound spring, part abrasion caused by a water hammer is avoided, meanwhile, liquid pressure is conducted to an inner cavity of the piston cylinder through the communicating pipe, and the valve element and the valve rod are driven to be pressed downwards; in the downward pressing process, the through hole in the communicating position of the through groove and the valve element is gradually reduced, and therefore flowing hydraulic pressure is adjusted more smoothly and stably.

The invention discloses a closed-loop control method for a hydraulic control butterfly valve of a PCCP (prestressed concrete cylinder pipe) long-distance high-pressure water conveying pipeline, and belongs to the technical field of long-distance high-pressure water conveying pipeline control. The problems that in the prior art, due to manual scheduling or single-point PID control, a long-distance PCCP water conveying system has response lag and lacks global cooperation, the water attack risk is difficult to effectively deal with, and the optimal overall energy consumption of the system cannot be considered are solved. According to the invention, by constructing a hierarchical control architecture in which a distributed measurement and control network is coordinated with a central supervision control and data acquisition system platform, a variable-parameter PID control algorithm is built in an equipment PLC, so that millisecond-level identification and active suppression of a sudden water attack working condition are realized; a hydraulic simulation model and a multi-objective optimization algorithm are deployed in a central supervision control and data acquisition system master station, and a whole-line optimal pressure set value is solved through iterative calculation and is issued to each PLC for execution, so that the system energy consumption minimization is realized on the premise of ensuring the pipeline safety.

The invention relates to the technical field of municipal water supply, in particular to an intelligent regulation and control method for direct connection type pipe network pressure-superposed water supply equipment, and the method comprises the steps: extracting the structure and operation feature information of the pressure-superposed water supply equipment and a pipe network connected with the pressure-superposed water supply equipment through a water supply knowledge graph, and building a digital twin hydraulic model; performing simulation calculation and evaluation on hydraulic response of the candidate regulation and control actions in a preset prediction time domain in each regulation and control period, and constructing a first safety constraint based on a negative pressure risk index and a water attack risk index; meanwhile, anti-fact reasoning is conducted on candidate regulation and control actions on a working condition causal graph model, a second safety constraint and strategy prior are constructed in combination with a predefined accident chain, and a safety action domain is limited from physical simulation and working condition causal double-layer constraint; regulation and control actions possibly causing safety incidents such as negative pressure, water hammer or pipe explosion can be recognized and eliminated in advance before control issuing, and compared with a traditional control mode only based on in-situ pressure regulation or an empirical threshold value, the water supply safety risk can be remarkably reduced.

The invention discloses a digital twinning-based multistage water-saving ship lock navigation safety guarantee method and system, and the method comprises the steps: collecting multi-source sensing data, generating an alignment data flow and a quality evaluation report, and updating a digital twinning state; by means of the aligned data flow and the quality evaluation report, through non-contact observation and probability fusion, mooring force probability distribution is obtained; based on the digital twinning state and the alignment data flow, identifying a hydraulic impulse response and adopting hydraulic phase lock tracking to generate a vibration suppression opening template; and in the digital twin system, integrating the mooring force probability distribution and the vibration suppression opening template, executing distribution robust random control barrier optimization, and outputting an executable valve track. According to the method, water hammer oscillation can be actively inhibited, robust safety guarantee is provided for uncertain mooring force, and the navigation safety of the large water-saving ship lock is effectively improved.

The invention discloses a transmission and distribution pattern optimization method for a multi-water-source water supply pipe network system, and the method comprises the steps: solving a multi-water-source initial ratio at a hour level, and determining the boundary of a water supply region of each water source as an energy storage regulation and control static frame; minute-level reversible flow-water head scanning is carried out on the high-level water tank and the two-way pump station to generate a virtual pressurizing unit, reverse matching is carried out to form an energy storage dispatching pre-instruction, and the pre-instruction is locked as an executable instruction after returning to a static frame to verify water source reverse flow, water hammer overpressure and negative pressure pollution; a valve opening and closing sequence and a pump station rotating speed are coded into time-state vectors, the time-state vectors are input into a graph convolutional network transient pressure surrogate model to deduce a pressure envelope in the third hundred seconds in a rolling mode, only when the whole process is in a pipe allowable interval, the pressure envelope is issued to the site, and closed-loop collaborative optimization of the hour-level water source ratio and the minute-level energy storage scheduling is achieved. According to the method, the problems of complex calculation and control in multi-water-source, multi-energy-storage and multi-time-scale coupling are solved.

The invention relates to the technical field of hydroelectric engineering, in particular to a T-S fuzzy robust control method for a hydroelectric generating set adjusting system based on a linear matrix inequality, which comprises the following steps: establishing a system nonlinear mathematical model considering modeling uncertainty and external interference under a rigid water attack condition, and converting the system nonlinear mathematical model into an affine nonlinear state space form; a T-S fuzzy model is constructed, and precise approximation of global nonlinear characteristics is realized through linearization of a linear triangular membership function and representative working condition points; a fuzzy controller is designed based on a parallel distribution compensation strategy, and a robust control problem is converted into a linear matrix inequality form to solve a feedback gain matrix in combination with a Lyapunov stability theory and an H-infinity performance index. The method effectively improves the adaptability of the system to a complex operation environment, enhances the anti-disturbance capability, can significantly reduce the system oscillation, shortens the stabilization time, guarantees the safe and reliable operation of the hydroelectric generating set, and has important engineering application value.

Embodiment of a method, apparatus, and non-transitory computer readable medium for predicting a screen out event are disclosed herein. In one embodiment, a method comprises obtaining water hammer data for a wellbore; determining an inferred resistance for the wellbore from the water hammer data; comparing the inferred resistance for the wellbore with a measured resistance, wherein the measured resistance comprises at least one of an eroded resistance or a growth rate of the resistance for the wellbore; and predicting a screen-out event occurring in the wellbore based on at least the comparison of the inferred resistance with the measured resistance.

The invention discloses a power plant intelligent tool management system based on multi-device interconnection, and relates to the technical field of intelligent device management, and the system realizes digital mirroring of hydraulic tools through a tool digital twin module, and synchronizes a use state and a loss condition in real time. Secondly, the tool state monitoring module accurately monitors the external and internal loss conditions of the hydraulic tool through laser scanning and infrared thermal imaging scanning technologies, meanwhile, dynamic pressure fluctuation is monitored in real time in combination with a water hammer effect coefficient, the influence of the water hammer effect on a hydraulic system is effectively recognized, hydraulic parameters are optimized, and the working efficiency is improved. And the damage of the water hammer effect to the tools is prevented, and the safety and durability of the equipment are improved. The secondary monitoring module continuously monitors vibration and resonance states after the self-healing strategy is executed, and once abnormity is recognized, an early warning instruction is generated in time, and emergency recovery and repair measures are taken, so that equipment damage caused by resonance is effectively avoided.

The invention discloses a secondary water supply pump station remote operation and maintenance method and system based on the Internet of Things, relates to the technical field of resource management, and realizes accurate identification of'micro water hammer 'implicit disturbance by collecting water supply related data, constructing a disturbance residual factor Dk, judging a water supply state and obtaining a dislocation characteristic index. The problem of missed judgment of short-time and low-amplitude dislocation behaviors in a traditional method is solved, periodic risk fluctuation is quantified through autocorrelation analysis of a time interval sequence, finally, an adjustment strategy is generated in real time in combination with a disturbance countermeasure library and is issued to a main control system, closed-loop control and self-adaptive correction of structural water hammer risks are achieved, and the accuracy of the structural water hammer risk is improved. And the steady-state operation capability of the secondary water supply pump station is effectively improved.

The invention discloses an intelligent anti-impact control method for a mining remote water seal system. The method aims to solve the problem of water hammer impact caused by quick opening of a valve during remote quick water injection. The method comprises the steps that after a remote water injection instruction is received, a pneumatic valve is controlled to be opened; in the valve opening process, real-time pressure data in the water supply pipeline are obtained; and based on the real-time pressure data, the opening process of the pneumatic valve is intelligently adjusted so as to restrain pressure impact in the pipeline. The method is characterized in that the opening rate of the valve is nonlinearly adjusted according to the pressure safety margin ratio among the real-time pressure, the set maximum safety pressure threshold value and the target steady-state working pressure through a self-adaptive rate feed-forward control model. According to the invention, active suppression can be realized at the initial stage of water hammer impact formation, the pressure peak value is limited within a safety threshold value, and safe, rapid and self-adaptive anti-impact water injection control is realized.

The invention discloses a water hammer eliminating device and method based on cloud network intelligent interconnection, and belongs to the technical field of fluid conveying system safety protection. Aiming at the problems of response lag, node isolation, lack of predictive ability and poor fault tolerance of a traditional water hammer elimination device, the invention provides an intelligent protection scheme fusing cloud edge collaboration and physical data hybrid modeling. The device comprises a distributed data acquisition module, a water hammer elimination execution module, an intelligent control module and a cloud platform, real-time fluid parameters are collected, pipe network topological information is combined, the action time sequence is calculated based on the pressure wave propagation speed and the node distance, and pre-action is started before pressure waves arrive; a physical simulation model and an LSTM data driving model are fused to predict the water hammer risk, the safety redundancy time and the execution strategy are dynamically adjusted, and local autonomy and fault tolerance under communication interruption are supported. Millisecond-level pre-action and multi-node cooperative pressure relief are achieved, the water hammer peak pressure is remarkably reduced, and the safety and the intelligent operation and maintenance level of a complex pipe network are improved.

The application discloses a ball valve with a wear detection function, and relates to the technical field of ball valves.The ball valve comprises a ball valve body and a controller, the two ends of the ball valve body are respectively provided with an inlet pipe and an outlet pipe, an installation pipe is arranged in the inlet pipe, a plurality of water hammer eliminating assemblies and a plurality of absorbing assemblies are arranged between the installation pipes, an adjusting assembly is arranged above the ball valve body, a blocking ball is arranged in the ball valve body, the blocking ball is in transmission connection with the adjusting assembly, and a pressurizing assembly and a detection assembly are arranged at the output end of the ball valve body.In the process of use, the ball valve can increase the flow rate of water flow in the normal use stage, can disturb the water flow in the rapid closing state, and can reduce the influence of the water hammer effect on the ball valve body, and the device can also detect the blocking property of the ball valve body indirectly under the condition of detecting the flow rate through the detection assembly, thereby prolonging the service life of the ball valve.

The invention discloses a method and a system for predicting throttling performance of a waterproof hammer air valve based on multi-working-condition simulation, and relates to the technical field of waterproof hammer air valves. The method comprises the following steps: establishing a simulation reference model containing adjustable parameters for the waterproof hammer air valve; defining a multi-working-condition driving matrix, performing global sensitivity analysis on each working condition, and extracting dominant and redundant parameters; the reference model is equalized by redundant parameters, and working condition configuration and calibration are completed based on dominant parameters to generate a matching model; and real-time working conditions are collected and matched with corresponding models to complete throttling performance prediction. The technical problems of low calculation efficiency and insufficient prediction precision caused by an undefined parameter influence mechanism and model redundancy in a multi-working-condition scene of a traditional waterproof hammer air valve throttling performance prediction method are solved. The technical effects of accurately quantifying parameter influence through working condition global sensitivity analysis, equivalently processing redundant parameters to construct a lightweight working condition simulation model, and realizing high-precision and high-efficiency throttling performance real-time prediction under multiple working conditions are achieved.

The invention discloses a slow-start pneumatic switch valve device for trichlorosilane feeding, and belongs to the technical field of material preparation process valves. Comprising a switch valve and a pneumatic actuator, linear motion of a piston rod is converted into rotation fine adjustment through a swing arm rotation compensation mechanism, a solid / microgroove sealing ring and a sliding cavity wall are always kept on a theoretical contact line, abrasion microgaps are automatically compensated, zero-clearance sliding in the whole life cycle is achieved, and manual clearance adjustment is avoided; the solid sealing ring adopts surface-surface contact, so that the unit pressure is reduced by more than 50%, and the wear rate is obviously reduced; the omega-shaped groove of the microgroove sealing ring converts solid particles (10-50 microns Si) into groove edge elastic sealing, and the wear rate is reduced by 40% again; a sealing surface is provided with a uniform oil film, the dynamic and static friction coefficient difference is reduced, crawling / jumping in a 0-20% opening low-speed stage is eliminated, true slow starting is achieved, the water hammer effect during trichlorosilane feeding is avoided, the sealing surface is provided with the uniform oil film, the dynamic and static friction coefficient difference is reduced, and crawling / jumping in the 0-20% opening low-speed stage is eliminated.

The invention relates to the technical field of geotechnical engineering investigation, and particularly discloses a depth-adjustable sampling method for geotechnical investigation, which comprises the following steps: acquiring pore fluid pressure data in real time through a sensor group arranged at the front end of a sampler; based on the data, dynamically predicting an evolution trend of a pressure field in front of the sampler and generating a prediction result containing a pressure abnormal state and spatio-temporal information thereof; performing grading processing on the prediction result to obtain a pressure risk grade; carrying out collaborative decision making on the grade, the soil body sensitivity and the target sampling quality to generate a dynamic control strategy; and finally, the injection action of the sampler is adjusted in real time according to the strategy, the injection action comprises executing micro-amplitude withdrawing and re-injection circulation or gradual deceleration operation, and the control effect is ensured through closed-loop optimization. The method can actively inhibit the water attack and cavitation effect, and improves the quality and reliability of obtaining an undisturbed sample in a complex stratum.

This invention provides an apparatus and method for cleaning long-distance filling pipelines using a gas-water mixture, belonging to the field of paste pipeline transportation technology. The apparatus includes a gas supply system, a water supply system, a gas-water mixing system, a safety assurance system, and a data acquisition system. During pipeline cleaning, the gas supply system is turned on after filling is completed; high-pressure gas mixes with the cleaning water to form a gas-water two-phase impact flow; the gas-water impact flow cleans the filling residue inside the pipeline along the transportation pipeline; cleaning ends when the solid content of the cleaning water decreases to 1%–3%. The addition of high-pressure gas intensifies turbulence, rapidly accumulates and releases energy, and induces localized water hammer, thereby improving pipeline cleaning efficiency. This invention can reduce the amount of cleaning water used from the usual 1.3 times the volume of the pipeline to be cleaned to 0.7–0.9 times, and reduce the pipeline cleaning time by 30%. This invention has the advantages of low water consumption, short pipeline cleaning time, and good cleaning effect, overcoming the current problem of high water consumption in pipeline cleaning.

The invention provides an LNG flexible pipeline water hammer-thermal shock coupling fatigue life evaluation method. The method comprises the following steps that an LNG flexible pipeline three-dimensional thermal-mechanical coupling model is established; transient fluid pressure fluctuation and temperature shock in the valve switching process are simulated, and a time-varying temperature field, a stress field and a crack tip stress intensity factor of the pipeline under the water hammer-thermal shock coupling effect are solved; a low-temperature test system is constructed, simulation results and experimental data are compared, and boundary condition parameters in the LNG flexible pipeline three-dimensional thermal-mechanical coupling model are corrected; cyclic load characteristics in the corrected stress response spectrum are extracted based on a rain flow counting method, and in combination with a corrected EPRG empirical model or an SES model, the accumulated fatigue damage amount of the crack-containing pipeline under the water hammer-thermal shock coupling cyclic load is calculated; and predicting the residual fatigue life of the pipeline. According to the method, the prediction precision of the fatigue life of the LNG flexible pipeline under the complex coupling action of the water hammer and the thermal shock is improved.

The present application provides a water treatment machine for treating bathing water, which comprises a control valve, a water treatment device and a mixing valve, the control valve comprises a control valve body and a control valve core, wherein the control valve body forms a valve cavity, a cold water inlet, a cold water outlet, a hot water inlet, a hot water outlet, a soft water inlet, a first soft water outlet and a second soft water outlet, the water treatment device forms a water inlet and a water outlet, and the mixing valve forms a cold water flow channel, a hot water flow channel and a water supply flow channel, wherein the mixing valve is arranged to control the flow of water flowing through the cold water flow channel and the hot water flow channel to the water supply flow channel, and the water treatment machine for treating bathing water can control the flow of bathing water to the mixing valve and then to the filter core, so as to avoid the impact of water hammer on the mixing valve and the filter core of the water treatment machine for treating bathing water.

This invention relates to the field of research on the operational characteristics of overpressure relief devices, and particularly to an experimental device for measuring the operational characteristics of overpressure relief devices under water hammer conditions. The device includes: a high-pressure air compressor, a frame, a piston accumulator, a quick-opening device, a high-pressure test assembly, and a high-frequency dynamic pressure sensor. This invention enables the measurement of operational characteristics under different pressure rise rate loads caused by water hammer phenomena on a test bench, providing an experimental platform for the research on the operational characteristics of overpressure relief devices under high pressure rise rates. The overall device is simple, quick, and stable. It effectively solves the problem of applying high pressure rise rate loads in current overpressure relief device operational characteristic measurement tests, overcomes the danger of using combustible gas explosions as pressure sources in existing operational characteristic measurement tests, and overcomes the shortcomings of existing test methods, such as long testing times, the need to calculate gas explosion pressure, and the difficulty in accurately controlling the pressure rise rate.

1. The name of the design product: water lifting equipment (T6 megawatt water energy cycle power station). 2. The use of the design product: water hammer pump for water lifting. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model discloses a high-efficiency energy-saving type steam dewatering pressure pump, which belongs to the technical field of steam dewatering, and is characterized in that the high-efficiency energy-saving type steam dewatering pressure pump comprises a bottom plate, and an automatic controller is arranged on the front side of the bottom plate, an automatic dewatering mechanism is arranged, and a sliding rod and a top ball are driven to move up and down by utilizing the characteristic that a floating ball ascends and descends along with the water level in a dewatering shell; when the water level rises, the floating ball floats upwards, the top ball is close to the contact type sensor, the contact type sensor transmits a signal to the automatic controller, the automatic controller accurately controls the pressurization pumping drainage structure to be opened according to the signal, condensed water is drained in time, and when the water level drops, the floating ball drops, the top ball is away from the contact type sensor, and the automatic controller controls the pressurization pumping drainage structure to be closed. The process effectively overcomes the interference of steam pressure fluctuation on drainage, and compared with a traditional floating ball type drain valve, drainage is more timely and more accurate, condensation water accumulation is prevented, the steam conveying efficiency is guaranteed, meanwhile, the operation cost is reduced, the water hammer phenomenon is reduced, and the service life of equipment is prolonged.

The invention discloses a fracturing-based water hammer wave velocity inversion method, a readable storage medium and a fracturing-based water hammer wave velocity inversion device, and belongs to the technical field of fracturing. Performing noise reduction processing to obtain a noise reduction signal; converting the noise reduction signal to a reverse frequency domain; establishing a relationship between the cepstrum amplitude and the liquid inlet response time, generating a two-dimensional curve graph, identifying a peak point, and correspondingly obtaining the liquid inlet response time; designing a water hammer wave velocity value, and converting to obtain a liquid inlet depth value; and solving the minimum value of the difference sum between the liquid inlet depth value and the designed depth value. The readable storage medium stores the method. The device is provided with a computer program for storing and executing the method. According to the method, the water hammer wave velocity can be effectively determined under the conditions that the bridge plug slides and the actual bridge plug position is not matched with the designed bridge plug position, the liquid inlet position of the fracturing liquid is promoted to be better matched with the designed perforation position, then fracturing liquid inlet point recognition is guided, a fracturing construction scheme is optimized, and the fracturing transformation effect is improved.

The invention relates to the technical field of digital data processing, in particular to a water gate remote control system based on the internet of things, which comprises a basic parameter initialization module, an initial discrete action sequence construction module, a fluid pressure gradient calculation module, a real-time pressure gradient numerical value calculation module and a gate action self-adaptive shaping module. A fuzzy logic controller is used for calculating an action correction coefficient, an initial discrete action sequence is adjusted to generate a shaped drive control instruction, and a discrete stepping drive execution module is used for sending a control signal and generating a brake locking instruction when the positioning deviation reaches the standard. According to the invention, real-time fluid pressure is collected and gradient is calculated, a fuzzy logic controller is used to calculate a correction coefficient according to pressure gradient deviation, an initial discrete action sequence is subjected to adaptive shaping, and a driving strategy is adjusted during pressure fluctuation so as to smooth mechanical stress, ensure opening and closing stability and realize high-precision position locking. And a water hammer effect and mechanical damage are avoided.

The utility model relates to the technical field of pipeline valves, in particular to a device for controlling slow closing of a check valve, the check valve and a brake, a shell of the brake can axially rotate on a base of the brake, and the brake drives a brake assembly through an internal brake piston to generate friction braking with the shell of the brake; a piston rod of the double-acting piston cylinder is fixedly connected with a shell of the brake through the overturning assembly. The brake fluid storage tank is in one-way communication with a fluid inlet cavity of the double-acting piston cylinder and the brake piston through a first pipeline, the brake fluid storage tank is in two-way communication with the fluid inlet cavity of the double-acting piston cylinder and the brake piston through a second pipeline, and a control valve is arranged on the second pipeline. The brake fluid storage tank is bidirectionally communicated with the fluid return cavity through a third pipeline; friction braking is generated through the braking assembly and the brake shell, the slow closing effect of the valve clack is achieved, the slow closing effect is stable, the water hammer effect is remarkably eliminated, and when a water pump is started, the valve clack of the check valve can be easily and normally opened.

The invention relates to the technical field of electric ball valves, in particular to an electric ball valve capable of accurately adjusting medium flow. Transmission between the driving assembly and the valve element is achieved through the connecting sleeve, and maintenance and replacement are more convenient by disconnecting the connecting sleeve during maintenance; when the valve body is closed, liquid flows into the inner cavity of the connecting pipe and impacts the piston, so that high-pressure gas on one side of the piston is stressed and compressed, and the water hammer effect of the fluid is reduced; the three sets of circulation grooves are formed, meanwhile, the triangular circulation grooves increase the area of fluid due to linearity, the flow of the ball valve can be accurately controlled, when the valve element rotates to a proper angle, the circulation grooves and the valve body are communicated for use, then the outer wall of the valve element can conduct blocking closing, and after each circulation groove is used for a period of time and abraded, the flow of the ball valve can be accurately controlled. And when the next circulation groove is started, the three circulation grooves are started in sequence, so that the service life of the valve element is greatly prolonged, the situation that the flow cannot be accurately controlled due to abrasion of the circulation grooves is reduced, and the practicability is better.