17485results about "Hydro energy generation" patented technology

The invention discloses a hydropower station gate detection method and system, and relates to the technical field of hydropower station gate detection, and the method comprises the steps: collecting environment parameters, building a dynamic environment model, and determining a real-time impact factor on a gate state; synchronously collecting gate vibration and sound wave data to obtain a composite signal; constructing a short-term and long-term trend model, and identifying a potential abnormal trend; automatically adjusting the sampling frequency of the sensor according to an abnormal detection result; performing fault classification on the multi-parameter signals by using an event pattern recognition algorithm; and generating an automatic response strategy according to a fault classification result. According to the hydropower station gate detection method provided by the invention, the accuracy and efficiency of hydropower station gate detection are improved through multi-dimensional parameter fusion and adaptive sampling adjustment. Through monitoring of various parameters, the system can comprehensively analyze the state of the gate, the misjudgment risk caused by a single signal is reduced, and comprehensive recognition of faults is enhanced.

The invention relates to the technical field of pumped storage power station multi-sensor monitoring network time-space synchronous measurement, in particular to a pumped storage power station multi-sensor safety monitoring system, which comprises a sensor data acquisition module, a time-space synchronous network module, a data calibration module, a dynamic association model construction module, a multi-dimensional data fusion module and a graded early warning module. The dynamic correlation model building module simulates dynamic response of seepage pressure and surrounding rock strain through a fluid-structure interaction equation and a discrete element digital twinborn model, updates fracture permeability boundary conditions in real time, and extracts cross-sensor space-time correlation characteristics by adopting a convolutional long-short-term memory network improved by a multi-head attention mechanism. According to the method, the real-time early warning precision of abnormal events and the reliability of structural health assessment in the complex hydraulic and mechanical coupling environment are improved.

The embodiment of the invention provides a tunnel grouting method and device, and a grouting balance prediction system is constructed by combining a machine learning model and a numerical manifold method. By analyzing critical value characteristics of a pressure-volume curve and combining grouting flow and rock mass displacement data, model training is performed, and accurate prediction of the grouting state is realized. The system adopts a Bingham fluid model and a fluid-solid coupling model to calculate optimal grouting parameters, correction is carried out through a zero-thickness cohesion unit model, and automatic regulation and control of a grouting pump are achieved. According to the method, the defects of the traditional technology in parameter optimization and process control are effectively overcome, a scientific basis is provided for grouting construction of tunnel engineering, and the grouting quality and efficiency are remarkably improved.

The invention relates to the technical field of power generation equipment control, and discloses an intelligent control method and system for a hydroelectric generating set speed regulator, and the method comprises the steps: employing an introduction variable structure and variable parameter control technology, and dynamically adjusting the control parameters of a power closed loop and an opening closed loop; real-time calculation and feedback control are carried out, and a speed regulator responds to a power grid frequency modulation Operating data of key parts of the speed regulator are collected in real time through a sensor, feature extraction and mode recognition are conducted on the data in combination with an artificial intelligence algorithm, and the operating state and potential faults of the speed regulator are recognized; constructing a fault tree model based on the speed regulator state monitoring parameters, carrying out hierarchical analysis on the speed regulator, and positioning the specific position and reason of the fault; and verifying and optimizing the fault diagnosis result, and generating a targeted fault processing suggestion. The system comprises a dynamic adjustment module, a state evaluation module and a fault analysis module. According to the invention, the operation efficiency and safety of the hydroelectric generating set speed regulator in a complex power grid environment are obviously improved.

The invention provides a robot path planning method for mixed-flow water turbine runner blade defect inspection. The robot path planning method comprises the following steps that S1, feasibility analysis of robot defect inspection is conducted on a blade, and an effective detection area is determined; s2, extracting a three-dimensional mesh model of the blade surface from the effective detection area, and establishing bidirectional mapping between a three-dimensional space and a two-dimensional UV parameter space by projecting the three-dimensional mesh model to the two-dimensional UV parameter space; s3, generating a boundary offset path of the two-dimensional UV parameter space and a robot arch scanning path; and S4, based on the bidirectional mapping, processing the boundary offset path and the arch scanning path of the robot, and generating a path back projection and three-dimensional detection track. Through accurate curved surface parameterization, an efficient path generation algorithm and an accurate three-dimensional mapping strategy, the method aims at improving the detection efficiency and quality of the runner blade of the mixed-flow water turbine, and technical guarantee is provided for safe and stable operation of a hydropower station.

The invention discloses a water turbine fault classification diagnosis method based on multi-modal fusion and meta-learning. The method comprises the following steps: step 1, respectively extracting time domain features and Mel-language spectrogram features of monitoring noise signals of a water turbine through a feature extraction module; step 2, performing cross-modal attention mechanism fusion on the time domain features and the voiceprint features through a multi-modal fusion module, and adjusting a fusion weight based on a dynamic weight distribution mechanism; and step 3, performing small sample training optimization on the fused features through a meta-learning module, and improving the classification capability of the model for new fault types in combination with a Triplet Loss-KNN algorithm and twin network pre-training. The fault diagnosis method based on the time domain-voiceprint fusion network and meta learning has the advantages of being rapid in diagnosis, accurate in classification, high in generalization ability and the like, and the fault diagnosis precision of the water turbine based on noise signals can be effectively improved.

The invention provides a water turbine anomaly detection and fault diagnosis method based on multi-sensor data fusion, and the method comprises the steps: collecting stress data, audio signals, vibration signals and working condition data during the operation of a water turbine, and carrying out the preprocessing of the collected data, including data cleaning, alignment and normalization; extracting time-domain, frequency-domain and time-frequency-domain features of the preprocessed stress data, audio signals and vibration signals, forming a high-dimensional feature vector in combination with the preprocessed working condition data, and performing dimensionality reduction on the high-dimensional feature vector by using principal component analysis; performing anomaly detection on the dimensionality-reduced high-dimensional feature vector according to a clustering algorithm, a local outlier factor algorithm and an anomaly detection algorithm constructed by an auto-encoder neural network, and generating a comprehensive anomaly score in combination with a preset weight to obtain an anomaly detection result; and when the water turbine is in an abnormal state, the fault type is diagnosed through the similarity between the dimensionality-reduced high-dimensional feature vector and the historical fault feature template.

The invention provides an intelligent speed regulation control method and system for hydroelectric generating set multi-source data fusion, and relates to the technical field of hydropower station automation control, and the method comprises the steps: S1, collecting multi-source heterogeneous data, including mechanical quantity, hydraulic parameters and electrical quantity, in the operation process of a hydroelectric generating set; s2, performing standardized preprocessing on the multi-source heterogeneous data to obtain preprocessed data; s3, on the basis of the preprocessed data, global deep state feature information and operation trend prediction information of the hydroelectric generating set are extracted through a multi-layer data fusion algorithm, and a fused speed regulation decision basis is obtained; s4, generating a speed regulation control instruction for regulating the rotating speed of the hydroelectric generating set based on the fused speed regulation decision basis; and S5, performing speed regulation control on the hydroelectric generating set according to the speed regulation control instruction. Through multi-layer data fusion and a dynamic self-adaptive control strategy, comprehensive perception and accurate regulation and control of the operation state of the hydroelectric generating set are realized.

Provided in the present invention is a construction method for a karst tunnel to extend through a karst cave. The construction method comprises the following steps: (1) excavation expansion and support for a karst cave; (2) dredging of the base of the karst cave, and backfilling; (3) inverted-arch and filling construction; (4) water-stop wall construction, and concrete backfilling on two sides; (5) initial support construction; (6) initial-support top backfilling and waterproof-layer construction; (7) secondary-lining waterproofing and drainage construction; (8) mounting and debugging of a water pressure monitoring system; and (9) implementation of a monitoring and early-warning scheme. The construction method is suitable for engineering in unfavorable geological conditions, for example, a water-rich karst tunnel extending through large underground karst caves, karst troughs and underground rivers. In the construction method, the operation difficulty of the steps is relatively low, the construction quality is controllable, there are few construction blind areas, and the safety of construction is relatively high; the initial runoff balance of karst cave underground water can be maintained, and thus the surrounding ecological environment can be protected to the maximum extent.

The invention provides a pumped storage power station multi-element multi-target intelligent online site selection method and device and a storage medium. The method comprises the following steps: extracting a midpoint of each river network line segment as a candidate point to construct a candidate point set # imgabs0 #; the set # imgabs3 # is screened according to the water diversion distance # imgabs1 # and the water head parameter # imgabs2 #, and a set # imgabs4 # is obtained; verifying the dam length, the dam height, the reservoir capacity and the reservoir surface form of the candidate points in the set # imgabs5 # by using a multi-target constraint model to obtain a set # imgabs6 #; a candidate point # imgabs8 # is selected from the set # imgabs7 #, a candidate point # imgabs11 # matched with the candidate point # imgabs10 # in the set # imgabs9 # is screened out, and a set # imgabs12 # is obtained; and obtaining a candidate point, which is optimally matched with the candidate point # imgabs14 #, in the set # imgabs13 # through suitability analysis. The pumped storage power station online site selection method is optimized from the aspects of site selection efficiency, reservoir capacity calculation, homogeneous site optimization, site comprehensive evaluation and the like.

The invention provides a coal mine underground roadway surrounding rock reinforcement grouting system, and relates to the technical field of coal mining. Comprising a stirring barrel, a grouting pump, a moving frame, a grouting pipe mechanism, a steering mechanism, a grouting pipe length adjusting mechanism, a plugging mechanism and a power mechanism, and an input opening of the grouting pump communicates with the stirring barrel; the grouting pump and the stirring barrel are both arranged on the moving frame; the grouting pipe mechanism communicates with an output port of the grouting pump, and the grouting pipe mechanism is used for grouting the drill hole; the steering mechanism is connected with the grouting pipe mechanism and used for adjusting the angle of the grouting pipe mechanism so that the grouting pipe mechanism can be aligned with the drilled hole. The grouting pipe length adjusting mechanism is connected with the steering mechanism and the grouting pipe mechanism, and the grouting pipe length adjusting mechanism is used for adjusting the length of the grouting pipe mechanism; the periphery of the grouting pipe mechanism is sleeved with the plugging mechanism, and the plugging mechanism is used for plugging a drill hole when grouting is conducted on the interior of the drill hole through the grouting pipe mechanism; and the power mechanism is connected with the grouting pipe length adjusting mechanism.

The invention relates to the field of building structure reinforcement, in particular to an external bolt prestress tensioning device suitable for a tunnel segment joint. Comprising a fixed end mechanism, a tensioning end mechanism, a cambered surface self-adaptive bolt, a prestress bolt and a locking nut, the fixed end mechanism and the tensioning end mechanism each comprise a horizontal supporting plate, and the bottoms of the ends, away from each other, of the two horizontal supporting plates are fixedly connected with vertical supporting plates correspondingly; a screw rod part of the prestress bolt sequentially penetrates through a through hole in the vertical supporting plate of the fixing end mechanism and a through hole in the vertical supporting plate of the tensioning end mechanism and is provided with a locking nut, the tops of the ends, away from each other, of the two horizontal supporting plates are fixedly connected with lug plates correspondingly, and fixing holes are formed in the two lug plates correspondingly. The device provided by the invention is completely fixed on the surface of the to-be-reinforced structure in a mechanical contact mode, destructive drilling on the structure is not needed, and damage to the interior of the structure is avoided.

The present invention relates to the technical field of pipeline control valves, and provides a fixed cone valve having automatic pressure adjustment and locking functions. The fixed cone valve having automatic pressure adjustment and locking functions comprises external fixed pipes; a supporting pipe is fixedly connected to the interiors of the external fixed pipes; a fixed frame is fixedly connected to the interior of the supporting pipe; a flow dividing cover is fixedly connected to one side of the fixed frame; and a fixed disc is fixedly connected to one side of the flow dividing cover. According to the fixed cone valve having automatic pressure adjustment and locking functions, a servo motor is started, an output end of the servo motor drives a third gear to rotate, the third gear drives a second gear in meshed connection with the third gear to rotate, and the second gear drives an inner ring gear and an outer ring gear which are in meshed connection with the second gear to rotate; and when the inner ring gear and the outer ring gear rotate to drive two first gears to rotate, and the first gears rotate to drive first lead screws to rotate, connecting plates located on the outer side and connected by means of a ball nut pair drive a sealing blocking pipe to horizontally move, so as to control the water outflow amount, achieving the accurate adjustment effect.

Perform MJS cavity filling reinforcement on the soil under the existing station floor, set the necessary cutter head using the hobcutter data obtained from the analysis, and set the tunneling parameters of the shield machine for cutting in the ground according to the tunneling parameters of the shield machine for cutting in the air. In addition to synchronous grouting injection and secondary grouting injection, perform the construction of secondary grouting injection when cutting the diaphragm wall, observe the vertical displacement of the ballast bed of the station, the vertical and horizontal displacements of the side wall of the station, and the vertical displacement of the tunnel vault, and adjust the push speed and silo pressure in real time. Perform the construction of secondary grouting injection on the segments within the range of 10 rings from the door of the receiving shaft of the newly built station. After the shield machine has passed through, perform injection from the grouting holes of the porous segments. 【Effect】It can save human resources and ensure the safety of the structure of the existing upper station.

The invention belongs to the technical field of automatic assembly, and discloses an automatic assembly system and method for a large nut of a water turbine ball valve, and the system comprises a mechanical arm, an end effector and an intelligent nut tightening control system. The end effector integrates an electromagnet adsorption mechanism, a servo drive rotating mechanism, a floating compensation mechanism and a visual recognition mechanism, nuts of different specifications are grabbed in a self-adaptive mode through an electromagnet, submillimeter-level accurate positioning is achieved through a laser galvanometer stereo camera, and the assembling posture is automatically adjusted in combination with the floating compensation mechanism. The intelligent control system adopts a staged tightening strategy, performs real-time monitoring through a torque sensor, and has a dual protection mechanism. The hydraulic turbine ball valve large nut assembling machine achieves full-automatic assembling of hydraulic turbine ball valve large nuts, has the advantages of being high in assembling efficiency, high in positioning precision, high in adaptability, reliable in quality and the like, solves the problems that manual assembling is large in labor intensity, many in potential safety hazards, poor in quality consistency and the like, and remarkably improves the assembling quality and efficiency of key parts of a hydropower station.

The invention discloses a hydroelectric generating set runner blade incompleteness simulation method based on CFD and FEM, relates to the technical field of safe and stable operation of hydroelectric generating sets, and aims to simulate steady-state operation states of a water turbine under different operation conditions so as to evaluate the influence on the performance of the water turbine under runner blade damage working conditions such as blade wear and fracture. According to the method, important information about the performance and the service life can be provided for design and maintenance of the water turbine, the reliability and safety of a hydroelectric generating set are expected to be improved, meanwhile, the maintenance cost is reduced, and remarkable technical progress is brought to the field of hydroelectric generation.

The present invention relates to the technical field of tunnel construction. Disclosed are a tunnel lining vault void monitoring device and detection method. The tunnel lining vault void monitoring device comprises a contact sensing unit and a pressure contact detection unit; the contact sensing unit is provided with a plurality of contact points arranged at a vault position in a pouring space of secondary lining and arranged in the length direction of a tunnel vault, for making contact with concrete which reaches the vault during the secondary lining and transmitting a signal to a direct display terminal; the pressure contact detection unit is used for being provided at the vault position of the tunnel and arranged between a geotechnical cloth and a waterproof board, the geotechnical cloth is used for being laid on a primary support of a tunnel, and the pressure contact detection unit comprises a plurality of monitoring points arranged in the length direction of the tunnel vault. An active monitoring system of the present invention is simple and convenient to operate, has high practicability and high monitoring accuracy, enhances the accuracy of vault void monitoring, and reduces misjudgment caused by pulses or falling-off of the detection unit.

The invention discloses a self-powered intelligent network connection ball valve for adjusting fluid. The self-powered intelligent network connection ball valve comprises a ball valve body and an intelligent network connection control module arranged on the ball valve body. The ball valve body comprises a ball body, a rotating wheel arranged on the ball body, a transmission shaft connected with the rotating wheel and a generator connected with the transmission shaft. The generator is used for supplying power to the intelligent network connection control module; the intelligent network connection control module comprises a controller; the controller is used for adjusting the valve opening degree of the ball valve body. The pressure and the flow of the valve outlet can be more accurately controlled, and electric power can be provided for the intelligent network connection ball valve.

The invention relates to the technical field of pumped storage power stations, in particular to a pumped storage power station unit runner crack diagnosis and life evaluation method, which comprises the following steps: S1, accurately positioning a runner crack detection position; s2, accurately analyzing the shape and size of the runner crack; and S3, analyzing the performance microstructure of the runner material. According to the method, the crack condition, the material characteristics and the stress distribution under the actual working condition of the runner can be comprehensively and accurately evaluated by detecting the runner crack, analyzing the shape and the size of the crack, analyzing the microstructure of the material performance and finally simulating and analyzing the stress distribution of the working load of the runner; the method provides a solid data basis and theoretical basis for a crack propagation mechanism, life cycle prediction and runner life evaluation, can effectively realize multi-dimensional and multi-technical-means fusion, ensures the precision of crack detection and analysis, and can provide omnibearing data support for subsequent crack propagation prediction and life evaluation.

The invention provides a dam on-line safety monitoring and early warning system based on a pumped storage power station, and belongs to the technical field of safety monitoring, and the system comprises a data acquisition module which collects original data of a dam operation state in real time, and determines monitoring data after preliminary calibration; the data analysis module is used for carrying out real-time feature extraction on the preliminarily calibrated monitoring data, determining pre-processed data, fusing the pre-processed data with the image data of the dam to determine fused data and carrying out analysis so as to determine the safety coefficient of the dam; the state evaluation module is used for acquiring the real-time operation condition and historical data of the dam, generating a dynamic safety evaluation standard, determining the current safety state of the dam and generating early warning information; and the scheme determination module is used for determining abnormal parts of the dam based on the preliminarily calibrated monitoring data and the image data of the dam and further generating an early warning scheme in combination with the early warning information. The safety monitoring capability and the early warning efficiency of the dam are improved, and potential safety hazards are reduced.

The invention discloses an in-situ test method based on shield butt joint curtain grouting, which realizes complete circle crossing of grout injected from each pipeline by designing the arrangement circle number and length of curtain grouting pipelines, and ensures that the surrounding rock grouting reinforcement range meets the design requirement by adopting the minimum number of curtain grouting pipelines, so that a surrounding rock water system channel is fully filled, and the construction period is shortened. A stable water-free environment is provided for subsequent excavation, and the problems that in the prior art, a theoretical calculation basis is lacked, the shield butt joint section surrounding rock reinforcing range is affected, the slurry crossing quality problem is caused by too large pipeline spacing arrangement, and the reinforcing and water stopping effect of butt joint section surrounding rock is remarkably affected are effectively solved. Meanwhile, a sensor is preset in a drilling hole within the grouting range, formation pressure response caused by grout pressure and formation temperature change caused by grout hydration heat in the grouting process are monitored in real time, and data support is provided for selection of grouting parameters in a formation grouting reinforcement project.

The invention discloses a multi-working-condition multi-objective optimization design method for a water bucket structure of an impulse water turbine, which comprises the following steps: constructing a three-dimensional numerical model of an original water bucket structure of the impulse water turbine, and obtaining parameterized optimization design variables; modeling is conducted through the parameterized optimization design variables, a three-dimensional model of the impulse turbine runner bucket subjected to preliminary optimization design is obtained, the coordinate change direction and range of a control point of the three-dimensional model are restrained, and the restrained optimization design variables are obtained; according to the parameterized optimization design variable and the constrained optimization design variable, constructing a sample space of optimization design, and constructing a response surface model between the constrained optimization design variable and the optimization objective function; and performing global optimization on the response surface model to obtain an optimal solution set, and obtaining an optimal solution from the optimal solution set. According to the method, actual engineering requirements are considered when the optimization parameter range is set, and the phenomenon that the bucket blade is excessively deformed in the multi-working-condition optimization design process is effectively avoided.

The invention discloses an outgoing line shaft slip-form lining construction method, which belongs to the field of building construction, and comprises the following steps: construction preparation, completion of survey lofting of a shaft construction area, power supply, arrangement of a water supply and communication system, and slip-form manufacturing, installation and debugging. A lifting frame, a supporting frame, a vertical back ridge, a hydraulic jack, a supporting rod, a material distribution platform, a central rotary material distribution mechanism and a chute device are sequentially installed, and debugging and sliding and lifting testing of a hydraulic system are completed; slip form sliding and lifting and concrete pouring are conducted, construction is conducted in the three stages of initial sliding, normal sliding and lifting and sliding and lifting completion, and the concrete quality is ensured through layered pouring and accurate vibration; the construction precision of the slip form is controlled, deviation is monitored in real time through a laser swinger, a limiting and leveling device and a vertical monitoring system, and deviation correction measures are taken when the deviation exceeds 1.5 cm; and the sliding formwork is dismantled, specifically, the formwork is dismantled step by step after sliding formwork construction is completed. By optimizing the construction process and accurately controlling the technology, the construction efficiency and the concrete quality are remarkably improved.

The invention discloses a tunnel bottom plate longitudinal needle beam slip form trolley. The tunnel bottom plate longitudinal needle beam slip form trolley comprises a formwork assembly, a hopper, a chute, a needle beam, a hydraulic advancing device used for pushing the formwork assembly to move along the needle beam, a movable supporting leg, a front supporting leg, a rear supporting leg and two sets of anti-floating devices. The hydraulic advancing device is arranged so that the formwork assembly can walk in the length direction of the needle beam, after the formwork assembly walks to the limit, conversion of another working section of the needle beam and the other working section of an assembly of the needle beam is achieved through supporting of the movable supporting legs and the formwork assembly, and continuous pouring of adit bottom arch concrete is achieved within the length range of the needle beam. Calendaring and plastering can be performed in time before initial setting of the concrete, bubbles on the surface of the concrete are eliminated, and the apparent quality of the concrete is improved; the trolley can walk without independently arranging an external track, so that the labor and tool amortization cost is reduced; the bottom arch trolley is suitable for bottom arch lining construction of different section ranges with the same inner diameter.

The cavitation-erosion-resistant martensite welding wire comprises powder and a welding skin, and the powder comprises, by mass, 20.0%-25.0% of Cr powder, 25.0%-30.0% of Ni powder, 5.0%-8.0% of Mo powder, 3.0%-5.0% of Nb powder, 3.0%-5.0% of W powder, 0.5%-1.0% of C powder, 4.0%-6.0% of B powder, 0.8%-1.0% of Y2O3 powder and the balance Fe powder. The welding wire is specially used for solving the problem of frequent cavitation failure of the turbine runner. The invention further discloses a preparation method of the cavitation-erosion-resistant martensite welding wire for the water turbine runner.

The invention discloses a clearance monitoring method and device for hoisting of a rotor of a hydro-generator, and relates to the field of hydro-generators, and the method comprises the following steps: moving the rotor to a position right above a stator machine pit, and preliminarily aligning the center of the rotor and the center of a stator; first distances between the stator and the rotor are collected, when any first distance is smaller than a preset value, hook falling is stopped, and the center of the rotor is adjusted until the rotor descends to the preset calibration position of the stator; and collecting a first distance and a second distance between the stator and the rotor, calculating a minimum real-time distance between the rotor and the stator, and when the minimum real-time distance is smaller than a preset value, adjusting the center of the rotor and then continuing to drop the hook until the rotor drops onto a rack brake in a stator machine pit. According to the method, the gap in the rotor hoisting process can be monitored, and the current minimum distance between the rotor and the stator is calculated according to the monitoring result, so that the judgment accuracy is enhanced, the manpower is greatly saved, and the operation risk of personnel is avoided.

The invention provides a data center and pumped storage power station combined operation system and method. The system comprises an upper reservoir, a lower reservoir, a data center and a pumped storage power station. Wherein an air conditioning system is mounted in the data center; the air conditioning system comprises a heat exchange station, a hybrid heat exchanger and an air conditioning terminal. The system has the following advantages: 1, energy conservation and consumption reduction: a natural low-temperature water source is utilized, and the power consumption of a data center cooling system is greatly reduced; 2, the efficiency is improved: the cooling efficiency of the data center is obviously improved through an efficient heat exchange system; 3, the cost is reduced: the power use cost and the maintenance cost of air conditioning equipment are reduced, and the operation cost of the data center is reduced. And 4, environmental friendliness: the power consumption is reduced, the carbon emission is reduced, and the method is more environment-friendly. 5, initial investment is reduced: a natural cold source is utilized, and a refrigeration air-conditioning system of the data center is omitted, so that the initial investment is reduced; the pumped storage power station provides a UPS function for the data center, and initial investment is further reduced.

The invention relates to the technical field of valves, and discloses a self-adaptive flow proportion stop valve which comprises a valve body, a valve rod, a valve rod, a valve rod and a valve rod. The liquid inlet pipe is used for introducing fluid into the stop valve, and the liquid inlet pipe is fixedly connected to the left side of the valve body; and the liquid outlet pipe is used for discharging the fluid from the stop valve. According to the stop valve self-adaptive to the flow proportion, the cutting mechanism is arranged, when liquid passes through the impeller, the impeller is driven to rotate clockwise, and the cutting column rotates reversely relative to the impeller, so that pressure fluctuation in the liquid flowing process can be effectively relieved, the water hammer effect or impact caused by sudden pressure change is reduced, and other assemblies in a system are protected; particularly, when the liquid flow is large or the flow speed is high, the rotating action of the cutting column rotating reversely relative to the impeller is beneficial to generating a resistance mechanism in the liquid flowing process, and the reverse power action can consume part of kinetic energy of the liquid, so that sudden pressure fluctuation possibly generated in the fluid is relieved.

The invention belongs to the technical field of water turbine design, and particularly provides an optimal design method for turbine multi-working-condition draft tube vortex strip suppression. Performing CFD numerical simulation calculation on the vortex strip of the draft tube of the mixed-flow water turbine; carrying out draft tube vortex strip identification and volume objective function calculation based on a lambda2 criterion; a draft tube vortex strip inhibition optimization design problem is constructed; and solving an optimization design problem based on an EGO algorithm. By means of the method, the design efficiency and the design effect of modification or optimization design of various draft tubes, runner cones and the like can be improved, dependence on the experience of designers is avoided, and therefore the operation stability of the mixed-flow water turbine is better improved.

The invention discloses a portal type integrated operation workstation capable of adapting to different underground cavern sections. The portal type integrated operation workstation comprises a frame supporting system, an intelligent control room, a moving walking system, an electrical system and a functional arm system. The frame supporting system comprises first longitudinal beams which are arranged in a left-right spaced mode, and a plurality of transverse telescopic joints are installed between the left first longitudinal beam and the right first longitudinal beam. A plurality of longitudinal shrinkage joints are mounted at the lower end of each first longitudinal beam, the lower ends of the longitudinal shrinkage joints are connected with a high-strength supporting frame, and a movable walking system is mounted at the bottom of the high-strength supporting frame; the functional arm system comprises a concrete spraying-arch mounting arm, an anchor rod mounting arm and a drilling arm which are arranged in a layered mode from top to bottom. According to the portal type integrated operation workstation capable of adapting to different underground cavern sections, the functions of drilling, anchor rod construction, grouting, net hanging, arch frame installation, spraying and mixing and the like are integrated, and meanwhile the size of equipment can be freely adjusted so that the portal type integrated operation workstation can adapt to the extra-large sections of different sizes.