734 results about "Safety coefficient" patented technology

The invention discloses a hydraulic engineering digital design method based on digital twinning, and relates to the technical field of hydraulic engineering design. According to the digital twin-based hydraulic engineering digital design method, design demand information of a to-be-designed diversion tunnel is obtained and input into a pre-trained building recognition model for comprehensive analysis, a spatial layout map of the to-be-designed diversion tunnel is obtained, and a tunnel design digital twin model is constructed; simulation data of the tunnel design digital twinborn model are obtained, simulation analysis is carried out respectively, a tunnel construction risk index and a hydraulic action risk comprehensive index of the tunnel design digital twinborn model are obtained, comprehensive analysis is carried out, and a tunnel feasibility index of the tunnel design digital twinborn model is obtained; according to the method, the tunnel design digital twin model is subjected to design optimization based on the feasibility index, so that a lagging mode of re-evaluation after building is effectively avoided, later frequent reinforcement and reworking are prevented, and the engineering safety coefficient is improved.

The invention relates to the technical field of automatic driving trajectory planning control, in particular to an optimal inter-vehicle time interval control method for cooperative cruise of a truck under a communication delay condition. According to the method, a layered control framework of truck cooperative cruise control is designed, and a vehicle safety inter-vehicle time interval model, a communication delay model and a queue collision safety model are constructed; the inter-vehicle time interval, the communication delay coefficient and the safety coefficient are quantified into space particles, optimization is carried out based on a particle swarm algorithm, and the optimal inter-vehicle time interval on the basis of guaranteeing the queue safety and the fuel economy is obtained; designing a longitudinal model predictive control (MPC) expected acceleration decision controller of truck cooperative cruise by considering multi-target constraints of safety and fuel economy in a vehicle following process to obtain an expected acceleration; and a load change-considered feedforward and active-disturbance-rejection control brake driving error compensation model is established, so that the anti-jamming capability of the model is enhanced, and the actual acceleration of the queue truck accurately follows the expected acceleration under the load change condition.

The invention relates to the technical field of power equipment detection and evaluation, in particular to a transformer anti-short-circuit capability evaluation method based on finite element micro-damage accumulation, which comprises the steps of constructing a transformer full-fault finite element model, simulating and calculating the mechanical strength and safety coefficient of a winding, establishing a micro-damage accumulation model and evaluating the mechanical life. Bidirectional coupling analysis is realized through iterative simulation, and the anti-short-circuit capability of the transformer is dynamically evaluated in real time. According to the method, transformer design parameters, short-circuit impact influences and micro-damage cumulative effects can be comprehensively considered, accurate evaluation and dynamic monitoring of the anti-short-circuit capability in the whole life cycle are achieved, and a scientific basis is provided for operation and maintenance decisions.

According to the large-span steel structure refined construction method based on the simulation model, through whole-process refined simulation and optimization, the construction level of a large-span steel structure is remarkably improved, the construction scheme is determined based on a multi-objective optimization algorithm, accurate design of parameters such as hoisting, supporting and monitoring is achieved, a temperature field model is combined with actual measurement correction, and the construction efficiency is improved. The integration of optimization closure temperature, node semi-rigidity and initial defects enables simulation errors, support stability evaluation and optimization guarantee of safety coefficients, most construction risks can be predicted in advance on the whole, the field adjustment time is shortened, the formal construction period is shortened, the construction efficiency and safety are greatly improved, the obvious engineering value and economic benefits are achieved, and the method is suitable for popularization and application. The problem that an existing large-span steel structure construction method lacks a calculation model for predicting the risk in advance and shortening the construction period by combining multi-aspect data is solved.

The invention provides a pile foundation construction monitoring control method and system, and relates to the field of pile foundation construction.The method comprises the steps that operation parameters of construction equipment are obtained at multiple moments of a monitoring period; determining a safe operation coefficient of the construction equipment according to the operation parameters of the construction equipment; acquiring construction environment monitoring data of the construction area at a plurality of moments of the monitoring period; processing the construction environment monitoring data according to a trained construction environment risk prediction model, and determining a construction environment risk coefficient; acquiring pile foundation performance monitoring data at a plurality of moments of the monitoring period; according to the pile foundation performance monitoring data, the pile foundation safety coefficient is determined; and generating a monitoring control report according to the construction equipment safety operation coefficient, the construction environment risk coefficient and the pile foundation safety coefficient. According to the invention, the comprehensiveness of pile foundation construction monitoring control can be improved.

The application relates to a vehicle type traveling equipment. The vehicle type traveling equipment comprises a cutting assembly, a chassis, a cutting motor, a detection device and a control device. The cutting assembly comprises a mowing element for mowing. The chassis supports the cutting assembly. The cutting motor is arranged to drive the cutting assembly. The detection device detects a first operating parameter and a second operating parameter of the cutting motor. The control device controls the cutting motor to stop or slow down when the first operating parameter is in a first threshold range and the second operating parameter is in a second threshold range for a first preset time. The second operating parameter is different from the first operating parameter, and the second operating parameter at least comprises a rotating speed of the cutting motor. The application improves the accuracy of judging whether the cutting assembly works normally, and further improves the safety factor of the vehicle type traveling equipment.

The invention discloses an under-mine environment accurate positioning system based on a UWB technology, and relates to the technical field of data processing and positioning, an underground area is divided into a safe area and a dangerous area by obtaining the structure risk value of each sub-area and combining the structure risk value and the position information of the corresponding sub-area, and the safe area and the dangerous area are accurately positioned. A plurality of rescue robots are arranged in the underground area; acquiring position information of the mobile tag, displaying the position information on an electronic map, generating an air quality coefficient, and dividing the plurality of sub-regions into risk regions and safety regions according to the air quality coefficient; and sending inquiry information to the miner, acquiring a corresponding safety coefficient, and if the acquired safety coefficient is lower than a safety threshold value, planning a support path to the miner for the rescue robot, so that the rescue robot rescues the miner along the support path. After the miner is found according to the position information of the miner, the miner is rescued through guidance of the rescue robot, and the miner is prevented from getting lost and being lost.

The utility model relates to a rail type bin flattening device which comprises first rails and second rails which are arranged in parallel, a bottom frame and a first driving part are arranged between the first rails on the two sides, a scraping plate seat and a second driving part are arranged on the bottom frame, the second rails are located above the first rails, and bottom layer sliding blocks are arranged on the first rails in a sliding mode. Third rails are fixed to the bottom layer sliding blocks, surface layer sliding blocks are arranged in the third rails in a sliding mode, the bottom frame is installed between the surface layer sliding blocks on the two sides, third driving parts are arranged on the third rails, side edge sliding blocks are arranged on the second rails in a sliding mode, two sets of side edge sliding blocks are arranged on each second rail, and each side edge sliding block comprises a clamping part. And the clamping part is fixed with the third rail. When the height of the grain surface changes, the height of the bottom frame stretching across the full width range of the granary is adjusted, and compared with only lifting of the scraper, the overturning moment borne by the bottom frame is smaller. And the second track can share part of stress of the underframe, so that the stability and the safety coefficient of the utility model are further improved.

The present invention relates to the technical field of boiler manufacturing, and provides a weld seam structure suitable for a narrow gap water-cooled wall tube panel and a welding process. The weld seam structure comprises groove gaps formed between adjacent water-cooled wall tubes; joints are provided on the sides of the adjacent water-cooled wall tubes close to each other; the joints are distributed on the upper sides of the groove gaps, and the joints are communicated with the groove gaps; and the groove gaps comprise V-shaped grooves or U-shaped grooves. In addition to the original joints, adjacent water-cooled wall tubes are considered as a whole, and gaps formed between the water-cooled wall tubes are machined into groove gaps and welded with the joints, thereby increasing the thickness of a welding seam at a tangent point and the safety coefficient, facilitating ray radiographic inspection, and solving the technical problem of great hazards to the safe operation of units due to the fact that when the gaps between the adjacent water-cooled wall tubes are small, the welding quality at the tangent point position of the adjacent water-cooled wall tubes cannot be effectively guaranteed due to inconvenient observation, welding, and radiographic inspection.

The invention discloses a bolt strength calculation and evaluation method and device and a storage medium, and belongs to the technical field of commercial vehicles. The method comprises the steps that pre-tightening force is obtained; the pre-tightening force is applied to the bolt, and a whole vehicle pre-tightening working condition stress field result is obtained; obtaining the maximum value of the acceleration signal and the maximum value of the suspension displacement signal; establishing a whole vehicle vertical working condition, a braking working condition, a steering working condition and a torsion working condition based on the acceleration signal maximum value and the suspension displacement signal maximum value, and respectively substituting the whole vehicle pre-tightening working condition stress field results into the whole vehicle vertical working condition, the braking working condition, the steering working condition and the torsion working condition to obtain corresponding stress field results; and extracting the section force and the torque of the bolt from the corresponding stress field result, calculating the safety coefficient of the bolt based on the section force and the torque of the bolt, and evaluating the reliability of the bolt according to the safety coefficient. The technical problem that the bolt strength cannot be accurately calculated in the prior art can be solved.

The invention discloses a waterproof safety evaluation method and system for waterproof engineering, and belongs to the technical field of waterproofing of constructional engineering. According to the method, the waterproof safety level is comprehensively evaluated by determining an engineering structure defect quantitative index, setting a reference crack width Ws, measuring a waterproof material or engineering re-waterproof performance index Wm and calculating a waterproof safety coefficient K = Wm / Ws. The system evaluates grades based on the method, and selects corresponding waterproof materials and construction methods according to engineering importance, expected deformation and service life. According to the invention, concepts of'waterproof performance 'and'waterproof safety coefficient' are put forward for the first time, a quantitative evaluation system oriented to waterproof performance is established, the defects of heavy form and light actual effect of current specifications are effectively overcome, the transformation from'form compliance 'to'performance standard' is realized, the reliability, durability and economy of waterproof engineering are remarkably improved, and the method is suitable for popularization and application. And a scientific basis is provided for engineering design, material selection and acceptance.

The invention provides a monorail crane rail heavy sliding turnout which comprises an installation frame, a first short straight rail fixedly arranged below the left side of the installation frame, a second short straight rail fixedly arranged below the right side of the installation frame and a short bent rail. The rail transfer conduction assembly is movably arranged on the mounting frame and used for communicating the first short straight rail with the second short straight rail or communicating the first short straight rail with the short bent rail to form an integral structure, and the rail transfer driving air cylinder is fixedly arranged on the mounting frame and used for driving the rail transfer conduction assembly to move. The first limiting assembly and the second limiting assembly are arranged on the mounting frame and used for conducting linkage limiting on the left side and the right side of the rail transfer conduction assembly after the rail transfer conduction assembly moves in place, and the car stopping assembly is used for stopping passing of a curve when a straight way is connected or stopping passing of the straight way when the curve is connected. By means of the overall structural design, track changing is rapid and accurate during use, the structure is firm, the safety coefficient is high, the track changing running stability and passing ability of the monorail crane can be improved, faults and losses are reduced, and the running efficiency of the monorail crane is improved.

The invention provides a sleeve testing device and a strength checking and correcting method, and relates to the technical field of offshore high temperature and high pressure, and the device comprises a temperature control system which is used for providing a steady-state high-temperature simulation environment and a transient high-temperature simulation environment for a sleeve sample; the loading system is used for applying axial, radial and internal loads to the casing sample; the monitoring system is used for monitoring a surface temperature field, inner wall strain and leakage of the casing sample; and the data processing and control unit is respectively connected with the temperature control system, the loading system and the monitoring system. The method adopts the device and comprises the following steps: selecting a casing sample, fixing a sensor and completing initial calibration; heating the whole casing pipe and keeping the temperature constant, and applying instantaneous thermal shock to a specific area; synchronously applying axial, radial and internal loads; cooperatively monitoring the temperature field, the strain and the leakage rate to form an associated database; and correcting the safety coefficient. The invention solves the problems of single test temperature and insufficient load coupling of the traditional casing, and is suitable for casing performance evaluation.

The invention discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.

The invention discloses a safety production virtual training method and system for a mine underground scene, and the method comprises the steps: creating a model library, and storing a preset part model through the model library; based on the mine underground mine hole excavation design drawing, the spatial orientation of each component model is obtained, and a virtual practical training scene of the mine underground is generated; based on a received practical training instruction, a virtual practical training scene is obtained from the scene library according to the practical training instruction, and the virtual practical training scene is displayed on the interaction module; adjusting and transforming the virtual practical training scene based on an operation feedback signal of a practical training miner, labeling the component model with a high danger coefficient in the virtual practical training scene, judging the safety condition of each component model under the mine, calculating the average labeling number in the virtual practical training scene, and comprehensively judging the safety coefficient of the mine. The system has the advantages that the mine underground environment is simulated through the virtual reality technology, miners are helped to carry out safety operation training under the risk-free condition, and the safety consciousness and the emergency response capacity of the miners are improved.

A deep foundation pit supporting structure design method based on system reliability analysis relates to the technical field of foundation pit structures, and obtains a supporting structure design method with high safety coefficient and low supporting cost through calculation and analysis, and comprises the following steps: S1, obtaining an engineering exploration report and a preliminary design scheme corresponding to a deep foundation pit; s2, determining a value range of a design variable x and statistical characteristics of a random variable y; s3, determining a failure mode of a deep foundation pit support design system according to engineering characteristics of the support corresponding to the deep foundation pit; s4, constructing a limit state function of each failure mode; s5, constructing a system reliability model through the system failure probability of the series system in the step S4, fusing a multi-objective optimization model into the system reliability model, and setting an objective function and a constraint condition; and S6, setting a multi-objective optimization algorithm in the deep foundation pit support design system, calculating the safety and cost of different support structures by using the algorithm, obtaining a Pareto solution set, and obtaining the corresponding deep foundation pit support structure design through comparison and selection.

The invention relates to the technical field of slope reinforcement, and provides a micro pile combination reinforcement method for a highway expansive soil slope, which comprises the following steps: when the current stability safety coefficient, the current uplift bearing capacity, the current shear strength and the current flexural bearing capacity all meet the corresponding preset conditions, taking the current design size parameter as the final design size parameter; and according to the final design size parameters, the grouting amount of each hole in a first pile of the steel pipe pile assembly and the grouting amount of each hole in a second pile of the cast-in-place pile assembly are determined, and the steel pipe pile assembly is constructed on the slope bottom face of the expansive soil slope according to the grouting amount of each hole in the first pile. And then a cast-in-place pile assembly is constructed on the slope face of the expansive soil slope according to the grouting amount of each hole in the second pile. According to the method, the influence of the expansive soil property on design and construction of the micro piles is fully considered, interaction and combined arrangement of the micro cast-in-place piles and the micro grouting steel pipe piles are integrated, the safety and reliability of slope reinforcement are guaranteed, material waste caused by excessive conservative is avoided, and operability is high.

A contact type rail transit clearance detection device comprises a clearance detection device body, and the clearance detection device body comprises an integrated mounting base, a main body fixing support, a movable support, a plurality of detection plate frameworks and a plurality of detection plates. The movable support comprises an inner side support and an outer side support connected to the outer side of the inner side support through an adjusting assembly. The main body fixing support is installed on the integrated installation base, and the inner side support inner face of the movable support is installed on the main body fixing support through an adjusting assembly. The adjusting assembly comprises a hand wheel screw rod and a slideway; each detection plate is mounted on the detection plate framework through a bidirectional spring hinge, and each detection plate framework is connected to the periphery of the outer side bracket to form a limiting frame; and the locking piece is used for locking the position of the limiting frame. The gauge detection device body is foldable, does not intrude into the gauge at all, and is high in safety coefficient and convenient to operate, and the gauge frame can be folded and unfolded horizontally and vertically.

The invention relates to the technical field of protective devices, in particular to a protective device self-adaptive to crane loads. According to the technical scheme, the device comprises a main body, an installation plate is fixedly installed at the bottom of the main body, an operation table is installed on the main body in a sliding mode, a mooring rope is rotatably installed in the operation table, a hook is rotatably installed at one end of the mooring rope, and the device further comprises a stabilizing mechanism which is arranged at the bottom of the main body and used for fixing the hook in horizontal sliding. The hook is fixed in the hoisting process, uneven stress of the cable caused by shaking is avoided, meanwhile, the cable is buffered in the transportation process, the cable is prevented from being broken, objects are transported stably, and the safety coefficient is high.

The invention discloses a building construction site safety management informatization system and method, and relates to the technical field of safety management. The method comprises the following steps: reading and recording hazard index readings of different construction points on a construction site on line in real time; obtaining data logs of reading change of different hazard index items of different construction points of the construction site according to the hazard index reading which is read and recorded in real time; unsafe construction sections in the construction site are obtained according to the data logs of the reading changes of the different hazard index items of the different construction points of the construction site; obtaining the unsafe coefficient of each unsafe construction section according to the data logs of the reading changes of different hazard index items of different construction points in the unsafe construction section; and sequentially arranging the unsafe construction sections from high to low according to the unsafe coefficients of the unsafe construction sections to obtain a field detection sequence of the unsafe construction sections. According to the invention, timely and effective safety management of the building construction site is realized.

The invention is suitable for the technical field of engineering machinery safety control, and provides a forklift anti-rollover self-adaptive balance control system and method, and the system comprises a sensor group, a controller and an execution mechanism group. The sensor group detects vehicle body postures, cargo weight and road conditions; the controller automatically identifies working conditions such as flat ground, ramp and high-position stacking according to the data and calculates a safety coefficient; and the executing mechanism group comprises a vehicle body leveling mechanism capable of adjusting left and right suspensions and a door frame posture adjusting mechanism capable of actively adjusting postures. The controller can command the two mechanisms to work in different cooperation modes according to different recognition results, for example, the two mechanisms mainly adjust a vehicle body on a ramp, stabilize the vehicle body and goods when the goods are stacked at high positions, and preferentially stabilize the goods and then switch the vehicle under the most dangerous composite working condition. According to the method, passive alarm is changed into active cooperative adjustment, and the working efficiency is effectively guaranteed while the operation safety of the forklift under the complex working condition is improved.

The embodiment of the invention relates to the field of petroleum and natural gas development, and discloses a tubular column strength checking method, system and equipment under multi-factor coupling and a storage medium, the method comprises the following steps: fitting a relationship between a tubular column service environment parameter and a to-be-tested tubular column performance test parameter, and determining a tubular column strength checking additional multi-factor coupling influence coefficient; acquiring the extreme load and the strength of the to-be-tested tubular column under different working conditions; checking the additional multi-factor coupling influence coefficient, the pipe column extreme load and the pipe column strength according to the pipe column strength, and calculating the safety coefficient of the to-be-tested pipe column; and comparing the safety coefficient of the to-be-detected tubular column with the allowable minimum safety coefficient of the tubular column, and determining a target tubular column from the to-be-detected tubular column to complete the strength check of the tubular column. According to the embodiment of the invention, the mechanical property change of the tubular column in the actual underground environment is accurately simulated, the actual underground performance parameters and the corrosion rate of the tubular column are obtained and used for checking the strength of the tubular column, and the rationality and the safety of the strength checking of the underground tubular column are ensured.

The invention provides a high-voltage electricity approaching safety early warning method, system and device for an automobile crane, and belongs to the technical field of engineering machinery safety protection. Comprising the steps of collecting an electric field signal radiated by a high-voltage line, reversely deducing a distance based on an electric field intensity attenuation model, and calculating an azimuth angle of a charged body through a MUSIC algorithm; controlling a laser radar to perform high-density scanning within a set angle according to the azimuth angle to obtain three-dimensional point cloud data of the high-voltage line; time synchronization and coordinate registration are carried out on the electromagnetic sensing array and laser radar data, a three-dimensional space model of the high-voltage line is established after fusion, and the shortest distance between the three-dimensional space model and a suspension arm is calculated; identifying a voltage level, calculating a basic safety distance, correcting by combining an environment factor, and multiplying by a safety coefficient to obtain a dynamic safety threshold value; and according to the real-time distance between the suspension arm and the electrified body, triggering graded early warning and control actions. According to the invention, the problem of measurement deviation of a single sensor under complex electromagnetic environment, changeable illumination and meteorological working conditions is solved.

This application relates to the technical field of mechanical property testing, in particular to a stress relaxation deformation testing device for fasteners and its testing method. The testing device of this application includes a connecting part connected to the fastener to be tested, and also includes a measuring part for testing the deformation of the fastener. The connecting part includes an upper connecting sleeve and a lower connecting sleeve, and the measuring part includes an upper extensometer and a lower extensometer. The measuring device of this application is convenient to use and has high precision. It can be used for conventional fasteners, such as those between specifications M3 - M16, and can be used for measuring the stress relaxation deformation of the whole under normal temperature and high temperature environments, which is close to the actual working conditions and can better meet the life design and safety factor considerations in engineering practice applications. In addition, for aerospace fasteners, testing the whole fastener is more conducive to reducing the testing cost of enterprises, alleviating the economic burden of enterprises, and creating greater value for enterprises.

The invention discloses a double-rocker-arm derrick hoisting working condition intelligent analysis and stability improvement method, and relates to the technical field of power grid assemblage construction equipment. Working condition data of a derrick are collected in real time, and stability analysis is carried out based on the working condition data to obtain a safety coefficient representing the stability of the current working condition; the risk assessment of the hoisting operation process is realized; furthermore, a corresponding stability improvement strategy is executed based on the safety coefficient and / or the real-time working condition data, so that the system has the capabilities of intelligent decision making and active intervention, the limitation that judgment depends on artificial experience in the prior art is broken through, the stability guarantee of the derrick is converted into active regulation and control from passive protection, and the reliability of the derrick is improved. And the operation safety and decision-making scientificity under the extreme height and complex environment are obviously improved.

The invention relates to the technical field of stone, in particular to a graphite inclined angle cutting device which comprises a shell, two fixing plates are fixedly connected to the upper surface of the shell, two pin holes are fixedly connected to the upper surface of the shell, a wire changing device is arranged in the fixing plate on the left side, and a wire saw device is arranged on the front side wall of the fixing plate. The surface of the shell is rotationally connected with a carrying table, a dust suction device is arranged in the shell, and an angle adjusting device is arranged in the shell. According to the automatic feeding device, by arranging a sensor, when the sensor receives pressure, a signal can be transmitted to a feeding motor, and when the feeding motor receives an electric signal, after preset time is up, the feeding motor is driven to rotate; the feeding motor can drive the gear to rotate, so that the rack is pushed to move under the constraint of the sliding rail, then the feeding supporting rod and the feeding plate are pushed to move towards the fret saw, automatic feeding is achieved, the safety coefficient in the feeding process is increased, and meanwhile manpower is saved.

The invention discloses a safety construction method for side slope expanding excavation of fully-weathered granite residual soil, and provides an excavation process optimization method for a first-grade side slope close to an operation road on the basis of finite element simulation of the whole side slope expanding excavation construction process of the fully-weathered granite residual soil. The excavation safety construction method comprises the following steps that firstly, a temporary support is arranged, then a primary excavation procedure is designed, multiple sets of excavation parameter combinations are designed, then the slope state after secondary slope excavation is completed serves as the initial state, a finite element model of slope excavation is established for each scheme combination, excavation parameters are input, and a slope excavation result is obtained; and calculating the safety coefficient and the maximum displacement of the side slope after the side slope expanding excavation is completed under the excavation scheme, performing optimization according to the calculation result and the space requirement of the construction operation machinery, and finally determining the optimized expanding excavation parameters and the safe excavation process. According to the technical scheme, an optimized scheme can be provided for studying safe excavation of the fully-weathered granite residual soil slope.

The invention discloses a lifting type hanging frame and a construction operation platform with the lifting type hanging frame. The lifting type hanger comprises a hanger body and two sets of vertical lifting devices, multiple layers of functional areas are arranged in the hanger body, and the two sets of vertical lifting devices are connected with the two ends of the top of the hanger body respectively and used for driving the hanger body to ascend and descend. The construction operation platform comprises an annular main body truss and lifting type hanging frames, a plurality of extension trusses are arranged on the upper portion of the inner side of the main body truss in the circumferential direction of the main body truss at intervals, and the multiple lifting type hanging frames are distributed below the positions between every two adjacent extension trusses correspondingly. The two vertical lifting devices at the two ends of the hanger body are fixed to the lower ends of the two adjacent extension trusses correspondingly. According to the lifting type hanging frame, the height of the hanging frame can be flexibly adjusted, it is guaranteed that each functional area can be lifted to the corresponding construction layer during operation, the construction progress is effectively guaranteed, the overall height of the hanging frame is effectively reduced through the lifting type design, the weight is reduced, and the safety coefficient is improved.

The invention discloses a Z-shaped propeller underwater turnover installation method based on dynamic mechanical analysis, and relates to the technical field of ship propulsion system installation. Comprising the steps that S1, a comprehensive stress safety coefficient is obtained through sensor data and a mechanical model, and the water flow resultant force is corrected; s2, a hoisting mode is determined according to the allowable turning-over angle of the propeller, and meanwhile real-time hoisting is conducted according to the actual turning-over angle of the propeller; and S3, the propeller and the propeller base are attached through the guide rail and the hydraulic buffer system. According to the invention, the tension of the sling is automatically adjusted through the preset threshold value and the comprehensive stress safety coefficient, so that the stress of the sling in the hoisting process can be ensured to be always within a safety range, and the risk of sling breakage or propeller overturning is avoided; and the influence of water flow change on the propeller is dynamically corrected, so that the hoisting stability under complex sea conditions is improved.

The utility model provides a spring bearing device. Comprising a transmission table, a transmission assembly is arranged on the inner side of the transmission table, a lifting assembly is arranged at the top of the transmission table, and protection assemblies are arranged on the inner side, close to the left side and the right side, of the lifting assembly. According to the spring bearing device, all parts of the device are arranged in a matched mode, the double-end motor drives the two second bevel gears to rotate, the double-end motor is meshed with the first bevel gear to drive the rotating rod to rotate, and the rotating rod drives the transmission gears on the two sides to rotate; a transmission gear rotates on a rack to complete displacement, so that the stability and the balance of the device are improved, two second protection plates are adjusted to a proper distance under the action of a protection assembly, and after being separated from the winding device, a wound spring stably falls into a bearing frame, so that the safety coefficient of the device is increased, and the device is convenient to use. And accidents caused by rolling of the high-temperature winding spring are avoided.