66 results about "Hydraulic load" patented technology

The invention belongs to the technical field of aircraft hydraulic pipeline pressure pulsation and vibration suppression design, and particularly relates to an aircraft hydraulic pipeline pressure pulsation and vibration suppression system and a design method thereof.The aircraft hydraulic pipeline pressure pulsation and vibration suppression system comprises a vibration absorber, a pressure accumulator, a rubber single-hole pipe clamp and a metal single-hole pipe clamp; the vibration absorber, the pressure accumulator, the rubber single-hole pipe clamp and the metal single-hole pipe clamp are arranged on the hydraulic pipeline, and the rubber single-hole pipe clamp and the metal single-hole pipe clamp are connected to the machine body structure through the pipeline support. An inlet of the hydraulic pipeline is connected with an outlet of the hydraulic pump, and an outlet of the hydraulic pipeline is connected with an inlet of the hydraulic load. The vibration absorber is arranged at an inlet of the hydraulic pipeline, close to an outlet of the hydraulic pump and located on the upstream of the one-way oil supply valve, and the pressure accumulator is arranged between the high-pressure oil filter and the hydraulic load; a plurality of rubber single-hole pipe clamps and a plurality of metal single-hole pipe clamps are distributed on the hydraulic pipeline.

The utility model relates to an active load adjusting bridge system for a cutter suction dredger. Comprising a bridge frame, the root of the bridge frame is hinged to a cutter suction dredger body, a mud pump assembly and a mud pipeline are installed in the middle of the bridge frame, and a reamer assembly is installed at the end of the bridge frame; a portal frame is installed at the position of a bow of the cutter suction dredger body, a pulley system is installed at the top of the portal frame, a lifting pulley is installed at the top of the end of the bridge frame, a lifting winch is further installed on the cutter suction dredger body, and a lifting steel cable collected and released by the lifting winch is wound on the pulley system and the lifting pulley. And a hydraulic load assembly for exerting an active pushing effect on the bridge frame is further mounted between the cutter suction dredger body and the bridge frame. According to the active load adjusting bridge system for the cutter suction dredger, active load control is applied in a hard soil excavation scene, so that the reamer assembly can effectively feed in a water bottom mud surface, smooth construction is achieved, and excavation construction efficiency is guaranteed.

The invention provides a method for analyzing deformation characteristics of an exit slope of a flood discharge building, which comprises the following steps of: firstly, collecting geotechnical parameters, hydraulic load parameters, GNSS displacement, pore water pressure and clinometer data of the slope; then, constitutive parameters of the slope stability model are dynamically corrected, GNSS displacement is decomposed into creep and elastic displacement components, and the time delay error of pore water pressure data is compensated; thirdly, seepage-stress coupling stability calculation is conducted in combination with the compensated pore water pressure and inclinometer data, and the slope stability safety coefficient is obtained. And finally, outputting the creep displacement, the elastic displacement and the stability safety coefficient to an early warning terminal. According to the invention, the accuracy and reliability of slope stability evaluation can be improved.

The invention relates to the field of mechanical engineering, in particular to a hydraulic-structure collaborative optimization design method for a shield pump, and aims to solve the problems of load distortion and structure matching imbalance caused by traditional staged optimization. The method comprises the following steps: constructing a fluid-solid bidirectional coupling simulation model, and extracting transient hydraulic loads under multiple working conditions; establishing a structure dynamic response agent model based on modal superposition and Gaussian process regression; key coupling parameters such as the impeller outlet width and the volute base circle diameter are recognized through a Sobol method; and the efficiency, the lift fluctuation rate, the stress and the vibration are taken as multiple targets, and a Pareto optimal solution is searched through an improved genetic algorithm. Manufacturing constraints are embedded in the optimization process, the single period is shorter than 48 hours, and fatigue life evaluation and knowledge base intelligent recommendation are supported. According to the method, closed-loop cooperation of hydraulic excitation and structural response is achieved, the vibration prediction error is lower than 10%, the optimization dimension is compressed to be within 5 dimensions, the efficiency is improved by 20 times or above, and the performance reliability and the design intelligence level of the shield pump are remarkably improved.

The utility model provides a turn-back type subsurface flow wetland. The turn-back type subsurface flow wetland comprises a water distribution channel, a wetland reaction bed and a water outlet channel which are sequentially communicated along the water flow direction, the wetland reaction bed comprises a wetland wall body, a plurality of first flow guide walls and a plurality of second flow guide walls are arranged in the wetland wall body, the first flow guide walls and the second flow guide walls extend in the direction perpendicular to the water flow direction, and the first flow guide walls and the second flow guide walls are alternately arranged at intervals in the water flow direction; the wetland reaction bed is divided into a plurality of purification chambers which are communicated in sequence; the first flow guide wall is provided with a first baffling opening communicated with the two adjacent purification cavities, the second flow guide wall is provided with a second baffling opening communicated with the two adjacent purification cavities, and the elevation of the bottom surface of the first baffling opening is higher than that of the top surface of the second baffling opening; a filler layer is arranged in the purification chamber, and a plant layer is arranged at the top of the filler layer. The sewage treatment device has the advantages of high hydraulic load, good treatment effect and difficulty in blockage.

The invention discloses a heavy-load linear guide rail pair loading device, and relates to the field of linear guide rail pair tests, the heavy-load linear guide rail pair loading device comprises a supporting rack component, a sliding test component and a hydraulic loading component, the supporting rack component comprises a main supporting rack, a portal frame and a linear driving assembly; the sliding test component comprises a working table, a tested guide rail pair and a load docking port; the hydraulic loading component comprises a hydraulic cylinder and an adapter port, and the adapter port and the load docking port are configured to realize stress balance between the adapter port and the load docking port when being subjected to a load; wherein the upper surface of the load docking port is provided with a plurality of grooves, the grooves are internally provided with sliding tables of which the tops are inclined planes, the sliding tables are provided with positioning convex parts capable of sliding along the sliding tables, and the lower end of the adapter port is provided with a plurality of positioning concave parts which correspond to the positioning convex parts one by one and are matched with the positioning convex parts. The influence of a load deflection angle is eliminated by using the sliding table, and positioning is realized through the matching of the positioning convex part and the positioning concave part, so that the uniformity of stress load of each point of the detected guide rail pair is ensured.

The invention relates to the technical field of water treatment, and discloses an intelligent response type mine wastewater treatment system which comprises a physical treatment subsystem and a control subsystem. The control subsystem calculates a normalized effective contact efficiency factor and a fluid drag strength factor based on the collected fluid flux and source frequency data. The calculation module adjusts the mechanical shear power of the mixing unit according to the effective contact efficiency factor, and keeps the Damkler number in the reaction system constant so as to compensate the contact time loss; and adjusting the excitation current of the separation unit according to the fluid drag strength factor, constructing a dynamic magnetic field gradient balanced with a fluid drag force vector, and executing pre-excitation when an impact precursor is identified. When the fluid drag strength exceeds a physical limit, the system controls the dosing interface to perform supersaturated dosing. Through cooperative regulation and control of a multi-dimensional physical field and chemical potential energy, rapid response and stable treatment of the unsteady hydraulic load are achieved.

The invention relates to a method for providing a fluid supply for hydraulic loads (17) using a variable-speed drive (10) for a fluid pump (12) with a variable fluid delivery volume Vg, comprising a control device (58), which changes the fluid delivery volume Vg of the fluid pump (12) on the basis of at least a hydraulic feedback of a pressure, and comprising a sensor system, which consists at least of a pressure sensor (36) for detecting the actual pressure pIst and a sensor (38) for detecting a measurement variable which is proportional to the fluid delivery volume Vg of the fluid pump (12), in particular in the form of a pivot angle aIst. The method is characterized in that at least the actual pressure pIst and the actual pivot angle alst are the respective input variables for an electronic controller (34) which determines at least the rotational speed n of the variable-speed drive (10) as a respective output variable and, as a function of at least one one-dimensional or one multi-dimensional characteristic map, a target pivot angle o-'s oii which serves as a control deviation e for the rotational speed control while being continuously compared with the actual pivot angle a'lst.

This invention discloses a dynamic inversion method and system for equivalent elastic parameters of porous water-bearing rocks, relating to the field of underground engineering technology. The method includes the following steps: real-time acquisition of lining strain data, displacement data, and pore water pressure data of underground structures in porous water-bearing rock strata using on-site monitoring equipment; preprocessing of the acquired raw data to remove outliers and noise; establishing an inversion objective function based on the preprocessed data and the correlation between pore water pressure and the equivalent elastic modulus and equivalent Poisson's ratio of the rock; solving the inversion objective function using an inversion algorithm to obtain the equivalent elastic modulus and equivalent Poisson's ratio of the surrounding rock; verifying and correcting the obtained equivalent elastic modulus and equivalent Poisson's ratio, and outputting the final result. This invention can provide accurate input parameters for calculating the hydraulic load of underground structures in porous water-bearing rock strata, improving the accuracy and timeliness of underground engineering design and safety assessment.

The application provides a hydraulic load simulation active and passive, multi-working condition loading method and a hydraulic system, and the application realizes passive loading and active loading of hydraulic load simulation through a load simulation hydraulic system with a loading hydraulic pump, an oil supplement pump, a load simulation hydraulic cylinder and a three-way proportional pressure reducing overflow valve group as the main body, and positive load and negative load working condition simulation can be realized. The application can effectively realize active loading and passive loading of hydraulic load simulation through two modes of pressure reduction and overflow of the three-way proportional pressure reducing overflow valve and combined oil supply of the loading pump and the oil supplement pump. In addition, in the active loading mode, active extension and active retraction of the load simulation hydraulic cylinder can be adjusted, and the active extension and active retraction pressure can be adjusted by the three-way proportional pressure reducing overflow valve, so that four working condition simulations of positive load working condition 1, positive load working condition 2, negative load working condition 1 and negative load working condition 2 can be realized.

The invention discloses a farmland underground pipe drainage multi-stage purification management method and system, relates to the field of farmland underground pipe drainage multi-stage purification management, is used for flexible management of flood peak flow and minimization of environmental risk, and comprises the following steps: monitoring the drainage flow of a farmland underground pipe in real time; according to the drainage flow, whether a drainage flood peak exists or not is recognized; under the condition that a drainage flood peak exists, overload drainage is determined according to the drainage flow and the hydraulic load of the purification equipment; the overloaded drained water flows back to the farmland underground to be subjected to permeation treatment or is guided to an ecological stagnant storage area to be subjected to stagnant storage treatment; and after the drainage flood peak is finished, reguiding the overloaded drainage subjected to the retention treatment or the permeation treatment to the purification equipment for purification treatment.

This invention relates to the field of municipal water supply and drainage engineering, and discloses an intelligent diversion and discharge system and method for combined sewer systems. The system includes a sewer body, a gate assembly, a monitoring assembly, and a control cabinet. The gate assembly includes a first electric gate located at the interception outlet and a second electric gate located at the direct discharge outlet. The PLC controller switches between interception mode, direct discharge mode, and emergency discharge mode based on a comparison of real-time liquid level with interception thresholds and emergency discharge thresholds. Furthermore, it can adjust the control strategy by incorporating rainfall intensity, sewage treatment plant influent hydraulic load, and water quality parameters to achieve sewage interception, direct discharge of low-pollution rainwater, and emergency pressure relief at high water levels.

The present application relates to the technical field of slope anti-sliding stability analysis, and particularly relates to a method for analyzing and calculating the anti-sliding stability of a discharge building outlet slope. The method comprises the following steps: obtaining discharge building data; collecting discharge building external structure data based on the discharge building data; determining the initial condition of the building outlet slope based on the discharge building external structure data and the discharge building data; analyzing the water flow fluctuation of the discharge building according to the discharge building data; detecting the aggravation degree of the hydraulic load of the outlet slope based on the initial condition of the building outlet slope and the water flow fluctuation of the discharge building; and determining the slope body penetration deformation trend of the slope based on the aggravation degree of the hydraulic load of the outlet slope. The present application analyzes the anti-sliding stability of the slope to achieve more accurate and efficient slope reinforcement.

The utility model relates to a high-efficiency sedimentation filter tank. The sedimentation and filtration tank comprises a coagulation zone, a flocculation zone, a sedimentation and filtration zone and a water outlet channel, the coagulation zone, the flocculation zone and the precipitation filtering zone are sequentially arranged along the water flow direction; the precipitation filtering area comprises an inclined pipe, an air grid and a filtering plate; the air grid, the filter plate and the inclined pipe are sequentially arranged in the precipitation filter area from top to bottom, a granular fiber filter material layer is arranged between the air grid and the filter plate, and the specific gravity range of a granular fiber filter material is 1.2-1.4; the water outlet channel is arranged at the top end of the precipitation filtering area. According to the scheme provided by the invention, the particle fiber filter material layer with small specific gravity is arranged above the inclined pipe, so that the interception amount of suspended matters in water is increased, the filtering effect, the effluent quality and the hydraulic load are greatly improved, and the head loss is reduced; meanwhile, raw water can be adopted when backwashing water is carried out on the particle fiber filter material layer, and filtered water does not need to be adopted, so that the water production rate is improved, the occupied area is reduced, the construction cost is reduced, and energy is saved.

The invention discloses a mining hydraulic dust removal fan and a control method thereof, and belongs to the technical field of coal mine underground dust treatment. The device comprises a fan impeller, a constant displacement hydraulic motor and a hydraulic system connected with the constant displacement hydraulic motor. The hydraulic system comprises a load-sensitive variable pump, an LS feedback oil way, a throttling valve, an oil tank, a liquid suction filter, a main oil way filter, a motor and a safety valve. A motor drives a load-sensitive variable pump to suck oil from an oil tank through a liquid suction filter, and pressure oil output by the pump sequentially passes through a main oil way filter and a throttling valve and then drives a constant displacement hydraulic motor. And the LS feedback oil way feeds back the downstream pressure of the throttle valve to an LS control port of the load-sensitive variable pump in real time, so that the pressure difference between a pump outlet and a load is constant, the flow passing through the throttle valve is kept constant, and the rotating speed and the air volume of a fan impeller are constant. Pure hydraulic load sensitive control is adopted, electronic elements are not needed, the structure is compact, the size is small, and the device is suitable for the narrow and dusty environment with the high anti-explosion requirement in an underground coal mine.

This invention relates to a hydraulic load-sensitive multi-way valve testing system, comprising a driver, a load-sensitive pump assembly, a variable hydraulic resistance, a load-sensitive compensator, and a directional valve connected in series to form a hydraulic output circuit. The driver controls the load-sensitive pump assembly to drive hydraulic oil upwards, which then experiences a pressure drop after passing through the variable hydraulic resistance. Finally, the hydraulic oil is output through the directional valve. The load-sensitive compensator is connected to the directional valve. The load-sensitive pump assembly includes an output pump, a pressure control valve, and a flow control valve. The driver drives the output pump. The rod chamber of the output pump is connected to the pressure control valve and the flow control valve. The output pump is connected to the directional valve, and the variable hydraulic resistance is located between the output pump and the directional valve. The pressure control valve is connected to the flow control valve and is used to limit the maximum working pressure. The inlet of the flow control valve is connected to the inlet of the directional valve. This invention provides a hydraulic load-sensitive multi-way valve testing system with small measurement errors.

The present application belongs to the field of oil and gas development and energy utilization, and relates to a shale oil and gas stimulation method using chemical energy for in-situ deep stimulation of reservoirs. The method aims to solve the problems of single well production being lower than the economic development threshold, low recovery rate, obvious production capacity decline and waste of resources. The present application comprises the following steps: perforating a horizontal well, injecting high-viscosity slick water and large-diameter proppants to form a primary main seepage channel, and then injecting liquid explosives; pushing the explosives to the primary main seepage channel by low-viscosity slick water to form a secondary seepage channel; and then injecting low-viscosity slick water and small-diameter proppants for support. Finally, the well is put into production after well killing and liquid discharge. The present application combines the advantages of static hydraulic load and chemical energy high-energy fracturing to realize the construction of multi-stage seepage channels, significantly improving the efficiency and quality of deep shale oil and gas resource development. Through the detonation method, water resources can be significantly saved.

A system for controlling hydraulic fluid flow within a work vehicle includes a hydraulic load and a pump configured to supply hydraulic fluid to the hydraulic load via a fluid supply conduit. The system also includes a flow control valve fluidly coupled to the fluid supply conduit upstream of the hydraulic load, a pilot-operated compensator valve fluidly coupled to the fluid supply conduit upstream of the flow control valve, and a pilot conduit fluidly coupled to the pilot-operated compensator valve such that the pilot conduit is configured to supply a pilot flow of hydraulic fluid to the pilot-operated compensator valve. Additionally, the system include a pilot selector valve configured to selectively fluidly couple the pilot conduit to either a first pilot source conduit or a second pilot source conduit to adjust a source of the pilot flow supplied to the pilot-operated compensator valve.

The invention relates to the technical field of engineering material water seepage performance testing, in particular to a water seepage performance detection device and a method for detecting the water seepage performance of an asphalt pavement. The water seepage performance detection device comprises a rack, a rectangular cylinder barrel and a test piece cavity which are communicated with each other are sequentially fixed to the rack from top to bottom, and a piston is in sliding fit in the rectangular cylinder barrel; a power driving device for driving the piston to move up and down is arranged on the rack; an air inlet pipe is fixed to the rectangular cylinder barrel, in the reciprocating motion process of the piston, external air is periodically sucked into the rectangular cylinder barrel through the air inlet pipe, and dynamic pressurization is formed on liquid in the rectangular cylinder barrel; according to the invention, the vertical dynamic pressure generated by the piston is coupled with the horizontal asymmetric surge excited by the plug flow plate, and the dynamic composite hydraulic load highly similar to the actual pavement can be reproduced in the surface and internal pores of the test piece, so that the dynamic water damage resistance of the asphalt pavement can be evaluated more truly and accurately.

The application discloses a ship rudder surface load simulation system and belongs to the field of electro-hydraulic servo control and semi-physical simulation. The system comprises a rudder system and a load simulation system. The application solves the problem that the active motion of the rudder system seriously influences the loading performance of the load simulator, i.e. the problem of redundant force. The application adopts hydraulic loading to simulate the hydrodynamic force of seawater on the ship rudder surface, and the loading force is not influenced by the redundant force. Therefore, the control strategy does not need to consider the problem of redundant force compensation, the complexity of the control strategy is reduced, and the control strategy is simple and reliable. The application solves the problem that the loading precision is low due to the redundant force existing in the electro-hydraulic load simulator, and the structure is scientific and reasonable.

The utility model relates to prebaked anode carbon block slotting technical field discloses a portable hydraulic bearing structure, including portable base, the portable base upper end fixed setting has the support station, the support station upper end fixed setting has the mobile support mechanism, the mobile support mechanism includes the sliding table, the sliding table inside lower extreme all horizontal sliding settings have the upper bearing platform, the upper bearing platform lower extreme all fixed settings have the lower bearing platform, the mobile support mechanism opposite side all fixed settings have the inner support mechanism, the inner support mechanism all includes two sliding support frames, two the sliding support frames opposite side all are provided with the check valve through, in the utility model, through the inside setting mobile support mechanism can adjust according to the specific slotting demand to be able to bear the weight of anode carbon block and the force produced in the slotting process, and reserves the space of full installation other mechanism, improved this bearing structure's practicality.

The application discloses a kind of surrounding rock safety monitoring method and system based on underground structure hydraulic load prediction, applied to surrounding rock safety monitoring technical field.The method comprises the following steps: the data required for surrounding rock stripping risk early warning is collected by sensor arranged at each monitoring point, while obtaining surrounding rock and lining structure data;Establish a finite element model, calculate the distribution of structure hydraulic load in pore water-bearing rock formation;Establish a surrounding rock stripping risk early warning model, based on the distribution of hydraulic load and the monitoring data collected by the sensor to carry out stripping risk early warning;The stripping risk early warning result is corrected in combination with threshold value;According to the corrected stripping risk early warning result, the corresponding response mechanism is executed.The application carries out surrounding rock safety risk early warning based on underground structure hydraulic load prediction, improves the accuracy of risk early warning, compared with the traditional strain numerical early warning scheme, the application can analyze the risk cause and propose targeted active prevention and control measures.

The invention discloses an active stabilization and power generation system of a floating type fan and a cooperative control method. The system comprises an inerter power generation subsystem and a hydraulic load regulation power generation subsystem. The inerter power generation subsystem comprises an inerter power generator, a damper sleeve and a disc. The inerter power generator comprises a power generator shell, a stator, a rotor and a ball screw. One end of the ball screw is used for being connected with a mooring cable, and the other end of the ball screw is connected with the disc which is slidably arranged in the damper sleeve. The hydraulic load regulation power generation subsystem comprises a pipeline assembly, a hydraulic generator and a piston type hydraulic cylinder, the piston type hydraulic cylinder is connected between the bottom of the damper sleeve and the disc, and the pipeline assembly can selectively control whether hydraulic oil flows through the hydraulic generator to do work or not. Based on the principle of a hydraulic load-adjusting power generation subsystem and a mass inerter, efficient absorption of motion energy under different working conditions can be achieved, the comprehensive power generation capacity is improved, and the method belongs to the technical field of wind power generation and vibration reduction.

The invention provides an MBBR (moving bed biofilm reactor) and magnetic coagulation rain sewage treatment system based on hydraulic load, and belongs to the technical field of sewage treatment, the MBBR and magnetic coagulation rain sewage treatment system based on hydraulic load comprises a primary sewage treatment box; the magnetic coagulation sewage discharging mechanism comprises a magnetic sewage discharging groove, a floating foam adsorption cylinder, a magnetic adsorption plate, a lifting sliding groove, a lifting sliding plate, a lifting supporting spring, a cleaning indicating lamp, a contact sensor and a lifting push plate, the magnetic sewage discharging groove is formed in the upper end of the primary sewage treatment box, and the floating foam adsorption cylinder is slidably connected into the magnetic sewage discharging groove; by arranging a magnetic adsorption plate and floating foam adsorption cylinder structure and combining a magnetic coagulation process, floccules and floating foam in sewage can be quickly adsorbed and intensively collected.

The application discloses an underwater working condition simulation test system and loading method of an electro-hydraulic actuator. The application is based on a test system mainly composed of a gear pump, a pressure compensator, a loading valve group and a loading cylinder. By adjusting the opening pressure of a proportional overflow valve in the loading valve group and combining oil supply of the pressure compensator and the gear pump, the application can realize multi-condition hydraulic load simulation of the electro-hydraulic actuator under underwater high-pressure environment. The application can adjust the oil line pressure of the system through the pressure compensator, adjust and control the active extension and retraction of the piston rod of the loading cylinder and the control cavity pressure through the proportional overflow valve, so as to realize multi-condition hydraulic load simulation under underwater high-pressure environment. The application can judge the safety condition of the system through a sensor, and in the case of unsafe condition, the application can close the oil-immersed motor and make the electromagnetic reversing valve in a power-off state through the controller, so as to ensure the safety of the system. Through the series connection of the overflow valve and the proportional overflow valve, the application can realize high-precision control of the control cavity pressure and the loading force of the loading cylinder.

The invention relates to the technical field of sewage treatment, and discloses hydraulic load self-adaptive multi-stage sewage treatment integrated equipment, which comprises a multi-stage sewage treatment machine body, a water inlet pipe arranged on the multi-stage sewage treatment machine body, and a hydraulic load adjusting part arranged on the multi-stage sewage treatment machine body, the hydraulic load adjusting part comprises a pressure reducing assembly arranged on the multi-stage sewage treatment machine body, and a first guide assembly and a clutch assembly are arranged on the pressure reducing assembly. According to the hydraulic load self-adaptive multi-stage sewage treatment integrated equipment, the centrifugal force assembly responds to the change of the water flow speed in real time and is matched with the clutch design of the friction wheel and the friction groove, so that the stroke of the partition plate is accurately controlled, and different water pressure working conditions can be dynamically adapted. Meanwhile, through cooperation of the locking assembly and the one-way rotating assembly, maloperation of the partition plate caused by water pressure fluctuation is avoided, it is guaranteed that the overflowing space of the pressure reduction box is stable, and the operation risk of a follow-up treatment unit is reduced from the source.

This invention discloses a low-damage demolition device for recycling concrete support beams, comprising: a combined load-bearing section, including a load-bearing trolley, telescopic outriggers connected to the load-bearing trolley, load-bearing I-beams mounted on the load-bearing trolley, and a connecting mechanism connecting the various load-bearing I-beams; a hydraulic rotating support system, including a hydraulic support section mounted on the hydraulic load-bearing trolley, a rotating section mounted on the hydraulic support section, and a support beam load-bearing section mounted on the rotating section, for supporting and stabilizing the support beam to be cut; and a support beam cutting section, including a cutting section load-bearing bracket mounted on the load-bearing I-beams and a cutting section mounted on the cutting section load-bearing bracket, for moving the cutting section up and down under the cutting section load-bearing bracket to cut the support beam. This invention uses a cutting machine to automatically cut the support beam, reducing manual labor and improving cutting efficiency.

The present application belongs to the technical field of sewage treatment, and discloses a real-time pollutant tracing and early warning system for sewage treatment process based on multiple sensors. The system comprises a space-time dynamic graph construction component, a dynamic edge weight updating component, a reverse feature aggregation component, a tracing reverse tracking component and a diffusion time prediction component. The system sets each process section monitoring node as a graph node, defines a directed edge with hydraulic flow direction and hydraulic retention time, and builds a space-time dynamic graph. The attenuation weight and time lag offset of the directed edge are dynamically corrected according to the real-time hydraulic load. The graph convolution time sequence feature aggregation is completed in the reverse direction along the hydraulic flow direction. When the effluent is abnormal, the reverse tracking of the abnormal feature surge node is performed to locate the pollution source. The pollution plume diffusion time is predicted by combining the source path feature gradient and the hydraulic retention time. The system can correct the space-time dislocation of data caused by hydraulic transmission time lag, suppress water flow mixing interference, and realize accurate positioning of the pollution source and forward-looking deduction of the diffusion trend.

A shield full-terrain tunneling simulation test method realizes a hydraulic loading intelligent control type model test of shield full-terrain tunneling simulation, can carry out shield construction indoor model test, and carries out research on shield diameter, buried depth, tunneling parameter, construction working condition and the like. The method comprises the following steps: step 1, obtaining soil sample parameters and presetting in an upper computer; step 2, determining a test scheme and presetting in the upper computer to form a system test task; step 3, installing a baffle; step 4, preparing soil samples; step 5, positioning the soil samples; step 6, pressurizing; step 7, shield tunneling; step 8, data acquisition; step 9, test ending; and step 10, pressure releasing and sample dismounting.

The invention provides a life estimation method and system for a water turbine runner, and relates to the technical field of water turbine runners, and the method comprises the steps: constructing a digital twin model of the water turbine runner; based on the digital twinborn model, analyzing hydraulic load distribution rules of the runner under different working conditions, and compiling a load spectrum; obtaining material fatigue performance parameters of the runner material, wherein the material fatigue performance parameters comprise a fatigue crack initiation life parameter and a crack growth rate parameter; estimating the fatigue crack initiation life of the runner based on the load spectrum and the fatigue crack initiation life parameter; estimating the propagation life of the fatigue crack of the runner based on the load spectrum and the crack propagation rate parameter; carrying out coupling analysis on the crack initiation life and the crack propagation life, establishing a comprehensive life estimation model, and outputting the expected service life of the runner through the comprehensive life estimation model; the accuracy of water turbine runner fatigue life estimation can be improved.