1240 results about "Water hammer" patented technology

The invention discloses a water supply pipe network water hammer control method and system based on multifunctional module fusion, and relates to the technical field of data identification. A time sequence diagram neural network prediction and traceability module which realizes water hammer risk prediction and propagation path traceability based on a causal constraint graph neural network model; the reinforcement learning intervention decision module is used for generating an active intervention strategy through a reinforcement learning agent, forming closed-loop control, abstracting a water supply pipe network into a graph structure, and modeling in combination with a time sequence, so that a propagation path of pressure waves can be comprehensively reflected, a blind area of traditional local modeling is overcome, and the comprehensiveness and accuracy of water hammer event detection are improved; and a causal analysis result is input as an adjacent matrix, so that the interference of irrelevant edges on prediction in topology is effectively eliminated, and the learning efficiency and causal traceability of the model are improved.

The invention discloses a water flow intelligent monitoring system and method, and relates to the technical field of water flow intelligent monitoring, in combination with an actuator health degree evaluation and multi-target prediction control method, the characteristics of a valve and a water pump are finely described by arranging sensors and constructing a digital twinborn model; model predictive control or multi-agent reinforcement learning is adopted to dynamically generate a reliable and efficient control instruction; furthermore, through real-time closed-loop deviation detection and self-adaptive correction, delay, faults or communication abnormity of the actuator can be accurately dealt with; 4, quickly completing self-healing and fault-tolerant control by using a fault prediction and standby scheduling strategy to prevent failure diffusion; and 5, scenes such as rainfall flood, fire fighting and reclaimed water are incorporated into the same framework, and multi-scene coupled comprehensive water resource management is realized, so that water hammer impact and water leakage risks can be effectively reduced, and the safety of the water supply system under complex working conditions or equipment aging is remarkably improved.

The invention discloses an intelligent cooperative switching control system and method for multi-path valve runners, and the method comprises the steps: collecting all-condition operation data of a multi-path valve system, extracting valve switching characteristic parameters, and building a runner mapping relation between paths; a cascade action chain containing time sequence dependence is constructed based on the mapping relation and the switching characteristics, and the action sequence and the trigger condition of each drift diameter are determined; by analyzing the pressure distribution and the flow velocity change in the cascade action chain, predicting the water hammer strength and designing a reverse pressure wave parameter, and generating a water hammer counteracting control instruction; high-low pressure area distribution in the flow field is identified, a flow field complementary cooperation scheme is constructed, and a pressure balance control strategy is generated; analyzing a pressure wave propagation path to determine a superposition elimination point, extracting pressure pulse resonance characteristics and generating time sequence control parameters; and the sequential control parameters are matched with the cascade action chain, synchronous control nodes are determined through delay compensation, and a time-sharing control sequence is generated to achieve intelligent cooperative switching of the multi-drift-diameter valve flow channels.

The invention provides a steam conveying control method and system based on multistage pressure regulation and dynamic feedback, and the method comprises the steps: obtaining real-time data, including pressure, flow and vibration signals, of a multi-source sensor in a steam pipe network, and forming a multi-dimensional data set; after judging that the water hammer phenomenon occurs, analyzing the vibration signal to obtain an abnormal vibration frequency in a pipe network, determining a propagation path of impact waves by combining pressure data, and positioning an area where an impact source is located; performing pressure grading control of partition differentiation according to the affected partitions; acquiring and analyzing the steam flow fluctuation condition of each affected subarea, analyzing the steam flow fluctuation condition of each subarea, determining target flow and priority, and adjusting the opening degree of an adjusting valve; real-time pressure and flow reading of a pipe network are continuously monitored, and setting of pressure adjusting points of all levels and the opening degree of the corresponding adjusting valve are dynamically adjusted so that steam conveying can be stably controlled.

The invention provides a multi-motor pulse speed regulation control method and system, and relates to the technical field of motor control, the method comprises the steps that a target set quantity and a target motor identifier are obtained, a target driving parameter is obtained through conversion according to a parameter set associated with the target motor identifier, and the parameter set comprises an elastic modulus value and a stress relaxation coefficient of a peristaltic pump hose; real-time driving parameters are maintained for the multiple pulse output channels respectively, and refreshing is carried out at the synchronization moment; operating state feedback values of a peristaltic pump channel and a stirring motor channel are collected, a water hammer effect frequency component and an impeller passing frequency component are extracted, and correction is carried out based on the elastic parameters; and judging whether a cross-channel resonance judgment condition is met or not, and when the condition is met, determining a frequency correction amount and a phase correction amount and applying the correction amounts to at least one pulse output channel, thereby reducing the resonance risk and stabilizing the system operation.

The invention discloses a pipeline water pressure test device, and relates to the technical field of water pressure tests. The device comprises a mounting frame, wherein a first mounting plate is rotationally mounted on one side of the mounting frame; the third driving piece drives the connecting rod to slide, fluid shock waves are generated at the end, namely a flow channel, of water in the lower pipeline under the action of the cylindrical block so as to simulate the water hammer phenomenon, a water hammer eliminator is simulated through compressed air in the upper pipeline, water flow in the pipeline is buffered and adjusted, and the water hammer phenomenon is simulated. The influence of the water hammer phenomenon on the pipelines is reduced, after the impact experiment is completed, water injection pressurization can be conducted on the two communicated pipelines through the water injection pipe, air in the pipelines is discharged, then the two pipelines are separated through the plugging piece, and the two pressure detection mechanisms can detect the water pressure in the two pipelines respectively. According to the invention, a fluid shock wave simulation test can be carried out on the pipeline, the loading capacity and the sealing performance of the pipeline can be tested in a static pressurization mode, and the device is convenient and easy to use.

The invention provides a method, medium and system for calculating the extension length of a hydraulic fracturing main fracture, and belongs to the technical field of hydraulic fracturing. The method, medium and system for calculating the extension length of the hydraulic fracturing main fracture comprise the steps that a water hammer wave signal at the position of a well mouth after hydraulic fracturing pump stopping is obtained; performing cepstrum analysis on the water hammer wave signal; the minimum period of the positive pulse extreme point of the complex cepstrum curve is calculated, and the time of the water hammer wave moving from a wellhead to a bridge plug is obtained; calculating the average speed of movement of the water hammer waves in the well; performing linear trend removal processing on the local signal of the water hammer wave; fourier transform is carried out on the local signal after linear trend removal processing, and a water hammer wave local signal frequency spectrum is obtained; extracting a fundamental frequency corresponding to a maximum value point in the water hammer wave local signal spectrum as a response frequency in the main crack; according to the response frequency in the main fracture, the propagation time of the water hammer wave in the main fracture is calculated; and calculating the extension length of the main crack.

The invention relates to the technical field of water pump system control, and discloses a multi-water-pump parallel cooperative control method and system.The multi-water-pump parallel cooperative control method comprises the steps that multi-sensor data is collected and preprocessed, and a multi-dimensional health state feature vector is constructed; fault feature learning is carried out, fault category prototype representation is constructed in a feature space by using a prototype network, and the distance between different fault types is maximized through metric learning; establishing a transfer learning mechanism, and taking the existing water pump historical fault data as source domain knowledge to transfer to a water pump lacking fault mark data; analyzing the time sequence state change of the water pump, and predicting the fault probability and the remaining service life; the water hammer effect and the pressure fluctuation in the switching process are eliminated by accurately controlling the rotating speed change rate of each pump and the valve opening adjusting time sequence; through innovative small sample learning, knowledge migration and smooth switching control technologies, the problems of fault prediction and smooth switching in the multi-water-pump parallel system are solved.

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 relates to the technical field of pressure release valves, in particular to a fire-fighting pipeline linear adjusting pressure release valve and a method, the fire-fighting pipeline linear adjusting pressure release valve comprises a first valve body, and further comprises a third valve body, a second valve body, a third valve core assembly, a second valve core assembly and a third valve core assembly, the second valve body is fixedly connected to the top of the third valve body, and a second valve element assembly is connected to the interior of the second valve body; and the pressure regulating mechanism comprises a pressure assembly communicating with the water outlet end of the first valve body, and the top of the second valve body is connected with an elastic assembly. By arranging the pressure adjusting mechanism, a traditional single spring adjusting mode is broken through, the water pressure in the sealing cover and the mechanical pressure of the adjusting screw rod and the first spring are superposed to form a composite pressure relief threshold value, and a method for linearly and finely adjusting the pressure relief threshold value is added; incompressibility of a water medium is utilized, instantaneous pressure fluctuation is absorbed, fatigue failure of the spring under high-frequency impact is effectively avoided, and the device is suitable for starting and stopping of a fire pump or scenes where water hammers frequently occur.

The invention discloses a method for determining the position of a liquid inlet point by using a hydraulic fracturing water hammer signal. The method comprises the following steps: analyzing a main peak of a frequency spectrum through fast Fourier transform, and adaptively determining upper and lower cut-off frequencies of a Gaussian band-pass filter; an alpha-trimmed filter is used for removing peak noise, and an alpha-trimmed filter is used for removing peak noise; extracting a period T of the water hammer signal by adopting an autocorrelation algorithm; carrying out mean value removal processing on the signal after time domain filtering; short-time Fourier transform related parameters are adaptively determined according to the water attack signal period T, and short-time Fourier transform operation is executed to obtain a frequency domain two-dimensional matrix; performing Gaussian band-pass filtering and cepstrum transformation on each column of the two-dimensional matrix to construct a cepstrum matrix; and distinguishing the bridge plug and the liquid inlet points based on the symbolic characteristics of the cepstrum value, determining the actual position of each liquid inlet point in combination with time-depth conversion, and drawing a cepstrum cloud picture. Compared with the prior art, the method is improved in the aspects of adaptive filtering, period extraction accuracy and cepstrum cloud picture artifact removal, and has higher positioning precision and better real-time performance.

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 utility model provides an open-loop controlled multifunctional hydraulic pulse test bench, which comprises a storage oil tank, an oil supply pump machine, a reversing valve, a pressurizing oil cylinder and an oil supplementing overflow valve, according to the test bed, a large amount of oil flows into a system at the moment that an oil way is opened by a reversing valve, and due to the fact that an overflow valve has a lag phenomenon in response, oil pressure instantaneously generates an overshoot peak value, pressure in a pipeline rapidly rises and a pressure peak appears, then the overflow valve is conducted, the oil is guided out along the overflow valve, and the pressure in the system is reduced to the set pressure of the overflow valve; water hammer waves and rectangular waves of various waveforms and frequency bands can be generated by adjusting the diameter of a variable damping hole of the one-way throttle valve and the rotating speed of the motor, so that the hydraulic pulse test bed can form hydraulic pulse waveforms of various waveforms and frequency bands; the set pressure of the overflow valve is increased, meanwhile, the travel switch loses efficacy, and when the reversing valve is located at the right position all the time, a damage test can be conducted on the hydraulic pipeline to measure the maximum pressure value capable of being borne by a tested piece.

According to the correction calculation method for the rigid water hammer turbine model coefficient, the flow coefficient of the water turbine is defined by rated working condition parameters according to the concept of a water head of the water turbine, the flow is rewritten into a function of the guide vane opening degree and the water head of the water turbine, and the problem that the flow measurement difficulty of a hydropower station is large is solved; establishing a water turbine linearization model by adopting a water turbine output equation recommended by IEEE Working Group, and constructing an increment linearization model from the guide vane opening to the water turbine output in combination with a water turbine flow linearization equation; the influence of pipeline hydraulic loss is introduced into a rigid water attack transfer function, a water turbine output transfer function model under the pipeline rigid water attack is established, the model has the same form as a PSD-BPA water turbine model of the China University of Electricity, and a model correction coefficient can be directly calculated, so that the parameter calculation of the model is simplified, and the application is convenient.

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 relates to the technical field of building engineering, in particular to a coupling carbon reduction optimization method for a building water supply and drainage system. The method comprises the following steps: acquiring operation data of a building drainage system; carrying out pump station working condition abnormity analysis based on the building drainage system operation data, and generating pump station working condition abnormity data; extracting a rainwater recovery path according to the building drainage system operation data; performing rainwater recovery pipe network backflow analysis based on the rainwater recovery path to obtain pipe network backflow data; the pipe network bearing pressure is evaluated according to the pipe network backflow data; performing leakage risk assessment based on the pipe network bearing pressure to obtain a pipe network leakage risk; the pump station start-stop times are counted according to the pump station working condition abnormal data; performing water hammer effect analysis according to the start-stop times of the pump station to obtain water hammer effect data; and according to the water hammer effect data and the pipe network leakage risk, identifying a fragile pipe network to obtain fragile pipe network data. The energy efficiency and carbon emission management of the building drainage system are optimized based on the building engineering technology, and the energy-saving and carbon-reducing efficiency is improved.

The utility model discloses a fracturing wellhead water hammer wave tester, which relates to the technical field of petroleum physical exploration, and comprises a wellhead oil pipe buckle joint, a copper gasket, a pressure gauge and a connecting plug, the wellhead oil pipe buckle joint is connected with a wellhead; the copper gasket is arranged between the wellhead oil pipe buckling head and the pressure gauge and is used for sealing and buffering between the wellhead oil pipe buckling head and the pressure gauge; the pressure gauge is used for monitoring wellhead pressure changes in real time; the connecting plug is used for connecting the pressure gauge with an external data processing system. Based on the tester provided by the invention, the pressure change generated during underground fracturing can be accurately and reliably monitored.

The invention relates to the field of hydraulic engineering, and provides a one-way tower theoretical scheme optimization method and system based on an intelligent algorithm, a terminal and a medium, and the method comprises the following steps: collecting pipeline system parameters, and deducing a one-way tower theoretical protection scheme based on a water hammer theory; all theoretical values in the unidirectional tower theoretical protection scheme are extracted, corresponding data of pipeline characteristic parameters and design parameters are generated, a training sample library is constructed, a prediction model is trained through a neural network algorithm, and nonlinear mapping prediction from the pipeline characteristic parameters to the design parameters is achieved; and a target function is constructed based on the output of the prediction model, global optimization is carried out by using the prediction model in combination with an optimization algorithm, and a one-way tower volume and water supplementing amount global collaborative optimization scheme which not only meets the pipeline pressure bearing standard but also minimizes an original target item is obtained. The method can solve the problems of lack of accurate optimization and easy falling into a local optimal solution in the prior art.

The present invention discloses a system comprising an actuation valve for receiving a first pressurized fluid, a piston in communication with the actuation valve, and a flow restrictor for controlling the flow of a second pressurized fluid from the piston. The flow restrictor may vent to ambient pressure and the piston may act as a pinch valve on at least one of an irrigation line.

The invention discloses an electro-hydrogen water coupling system planning method and device considering multi-energy flow dynamic characteristics, and the method comprises the steps: representing the slow dynamic characteristics of gas and liquid in a coupling system pipeline through a hyperbolic isothermal Euler partial differential equation and a hyperbolic water hammer partial differential equation, and considering the AC power flow characteristics of a power distribution network; electric hydrogen water multi-energy flow constraint is obtained; obtaining a decision independent uncertainty scene set according to a preset limited scene set; obtaining a decision dependence uncertainty set according to the hydrogenation demand induction effect; taking the planning cost constraint as a feasible region of a first stage, taking the coupled system operation constraint and the electro-hydrogen water multi-energy flow constraint as a feasible region of a second stage, and constructing a two-stage decision-dependent robust planning model of the coupled system; and solving the two-stage decision dependence robust programming model to obtain a site selection and capacity scheme of the coupled system.

The invention provides a pipeline water hammer monitoring method, device and equipment, and relates to the technical field of oil and gas pipeline monitoring. The method is applied to an SCADA system and comprises the steps that a detected trigger signal of fluid control equipment in an oil conveying pipeline is responded, a pressure signal and a flow signal in the oil conveying pipeline are obtained, and microsecond-level timestamps, corresponding to the trigger signal, of the pressure signal and the flow signal serve as time references; determining physical sparse characteristics according to the pressure signal and the flow signal; and determining whether an event corresponding to the trigger signal is a water hammer based on the physical sparse feature. According to the invention, the accuracy of water hammer positioning is improved.

The invention provides a pump stop pressure drop crack evaluation method, medium and equipment, and relates to the technical field of unconventional oil and gas development, and the method comprises the steps: building a crack network model based on ground stress, natural crack distribution and fracturing construction parameters, calculating crack fracture and expansion, and obtaining a crack network form; establishing a shaft-fracture water hammer model according to the fracture network form, and performing discrete solution on the water hammer model by using a characteristic line method; acquiring a simulated water attack effect curve based on the solved water attack model; comparing the simulated water attack effect curve with the actual wellhead pumping stop pressure drop curve, and adjusting the fracture network model and the water attack model until the error is not greater than a set threshold value; introducing a seam length index and a branch index, and establishing a two-parameter evaluation chart based on the geometric morphology of the seam net; and introducing a boundary index and an attenuation coefficient, establishing a two-parameter evaluation chart based on the water attack effect, and calculating four evaluation parameters to obtain a crack evaluation result. According to the method, the pump stop water attack phenomenon under the complex seam network condition can be effectively diagnosed.

The invention relates to the technical field of gate valve control systems, and discloses a pilot gate valve intelligent control system for a hydraulic valve, which comprises a valve body, and the valve body comprises a main valve clack, a hydraulic cavity, a pilot valve assembly, an intelligent control unit, a multi-source sensor, a human-computer interaction interface and a cloud server. According to the pilot gate valve intelligent control system for the hydraulic valve, a valve operation digital mirror image is built through the multi-source sensor set, the pressure sensor captures the pressure difference of a main valve, a reference is provided for water hammer suppression and the like, the electromagnetic flowmeter conducts non-contact measurement and adapts to multiple media, abrasion errors are avoided, and the magnetostriction displacement sensor monitors valve clack micro-motion; the vibration sensor carries out early warning on hidden dangers such as sealing abrasion through three-axis data, the temperature sensor corrects interference of fluid characteristics on control, the five sensors work cooperatively, all-directional monitoring of fluid parameters and mechanical states is achieved, data are accurately input for intelligent control, and efficient and stable operation of the valve is guaranteed.

The invention discloses a one-way adjustable nozzle for gas immersion jet. The one-way adjustable nozzle comprises a spring chamber and a pressure chamber. A pressure spring and a pressure relief hole are arranged in the spring chamber, the pressure chamber comprises a gas inlet, a connecting rod and a nozzle plug, and a sliding block is arranged on the boundary of the two chambers. According to the invention, in a non-starting stage and an air inlet initial stage, reaction immersion jet flow bath liquid is prevented from flowing back into the nozzle to corrode or solidify and block the nozzle, and condensation immersion jet flow bath liquid is prevented from further flowing into a pipeline to cause a water hammer or a phenomenon that a measurement sensor is damaged due to water inlet; therefore, the service life of experimental equipment is prolonged and the experimental safety is enhanced. Furthermore, the device is simple in structure, does not need other power supplies, is high in reaction speed, is high in precision, is high in bearing capacity, can achieve the precise blocking of bath lotion with different pressures, and meets the application demands of different gas pressure working conditions.

The invention discloses a stainless steel electric regulating valve, and particularly relates to the technical field of electric regulating valves, the stainless steel electric regulating valve comprises a valve body, a driving assembly, a valve core assembly and a connecting assembly, a liquid inlet cavity, a liquid outlet cavity and a regulating cavity are formed in the valve body, and the valve core assembly is arranged in the regulating cavity; the valve element assembly can seal and communicate the liquid inlet cavity and the adjusting cavity through movement, the connecting assembly comprises a connecting cavity formed in the upper end of the adjusting cavity, a pressure adjusting cylinder is arranged at the upper end of the connecting cavity, and a first piston cylinder and a second piston cylinder are arranged in the connecting cavity. By arranging the first valve element, the second valve element and the pressure adjusting cylinder, liquid is prevented from forming vortex at the bottom of the valve body, the water hammer effect of the electric control valve is buffered, meanwhile, error correction is conducted on the electric control valve after the electric control valve is completely opened every time, and the safety of the electric control valve is improved. Therefore, the flow control precision is improved, and the service life of the electric control valve is prolonged.

The present invention provides an anti-resonance large-caliber three-eccentric metal hard-sealed butterfly valve, which relates to the technical field of butterfly valves and comprises: an outer cylinder, a base, a top cover, an oil cup and an anti-vibration cylinder; a card slot is provided on the inner wall of the outer cylinder, and two groups of grooves are provided at the left and right ends of the outer cylinder, and sealing rings are installed in the grooves; the base bolts are installed at the upper end of the outer cylinder, and a worm gear shaft is connected to the upper shaft of the base, and the worm gear on the worm gear shaft is one-fourth of the size of an ordinary worm gear; the position of a cleaning roller is adjusted by loosening a butterfly nut so that the cleaning roller contacts the worm, and when the worm is rotated, the cleaning roller can sweep the dust on the worm to prevent the worm from being covered with dust and causing difficulty in the rotation of the worm; a water hammer effect occurs when the sealing plate is opened and closed, and when a shock wave is transmitted into the buffer cylinder, the shock wave acts on the piston, and the piston moves upward, which can effectively eliminate irregular shock wave oscillations and prevent the butterfly valve from resonating with the water flow and generating noise when in use.

The invention relates to a method for preventing a water hammer from being cut off during high-speed operation of a pipeline, which comprises the following steps of: 1, calculating pipeline pressure under various water levels and different flows according to the length of the pipeline, the inner diameter of the pipeline and the category of internal corrosion prevention, and preliminarily determining the opening degree corresponding to the flow required by operation of a flow regulating and pressure regulating valve; secondly, at least three cut-off methods including quick closing, slow closing and two-stage closing are proposed based on the initial opening degree of the flow and pressure regulating valve, the water hammer effects of all the cut-off methods are compared through simulation analysis, and the optimal cut-off scheme is selected; 3, verifying the optimal cut-off scheme in actual water supply operation of the water delivery pipeline; and fourthly, an automatic control system is additionally arranged at the position of the flow and pressure regulating valve, parameters are set through the system according to verified data, and automatic regulation and control over the opening degree of the valve and flow control are achieved. Unattended operation is achieved, sudden change of pressure borne by the pipeline can be effectively avoided, and operation stability is guaranteed.

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 discloses a slow-closing check valve and relates to the technical field of valves, the slow-closing check valve comprises a valve body and an opening and closing mechanism, the valve body is provided with an inner cavity, the two ends of the inner cavity are open, and the inner cavity comprises a rotating cavity in the middle and two channels on the two sides; the opening and closing mechanism comprises a main valve clack and an auxiliary valve clack, the main valve clack is rotationally arranged above one side of the rotating cavity and opens or closes the channel in a rotating and swinging mode, a liquid passing opening is formed in the main valve clack, and the auxiliary valve clack is rotationally arranged above the liquid passing opening and opens or closes the liquid passing opening in a rotating and swinging mode; rotation between the auxiliary valve clack and the main valve clack has a damping effect. The valve has the advantages that the water hammer effect is effectively relieved, sequential closing of the main and auxiliary valve clacks is achieved, and the safety of a pipeline system is 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.