438 results about "Bridge type" patented technology

The invention discloses a road bridge design method and system based on a BIM real scene model, and relates to the technical field of constructional engineering information, and the method comprises the steps: a BIM model carries out multi-objective optimization through a quantum annealing algorithm in combination with a bridge-crossing topology library, synchronously optimizes topological connectivity, structural stress and energy consumption indexes, generates a parameterized component, and feeds back the parameterized component to the BIM model; the model of the BIM model is loaded and optimized based on augmented reality equipment, the model is superposed to a reality scene through space anchoring, and the BIM model is corrected in combination with a conflict monitoring engine and a knowledge graph; the corrected BIM model is deployed to edge computer equipment, a dynamic deviation thermodynamic diagram is generated by scanning a construction surface, a lofting robot is driven to execute coordinate dotting, and meanwhile construction error data is transmitted back; according to the method, the problem that a global optimal solution is difficult to find when a traditional optimization algorithm is used for processing a complex multi-target problem is solved by utilizing an advanced quantum computing technology, and the economical efficiency and the structural safety of bridge design are greatly improved.

The invention discloses a bridge type transfer conveyor for coal mining, relates to the technical field of conveying, and aims to solve the technical problem that the capacity of pretreating coal briquettes before conveying is weak in the limited space of a thin coal seam. The bridge type transfer conveyor comprises a bridge type transfer conveyor main body, and a coal feeding mechanism is arranged at the lower end of the bridge type transfer conveyor main body; a coal discharging port is formed in the high end of the bridge type transfer conveyor body, the coal feeding mechanism comprises two fixed side plates, the two fixed side plates are of a symmetrical structure and are connected through a screening plate and a feeding plate, the screening plate is arranged above the feeding plate, the side wall of the screening plate is connected with an impurity leading-out plate, and the impurity leading-out plate is connected with a coal discharging port. A feeding frame is arranged at the top of the fixed side plate, a coal briquette crushing assembly is arranged between the screening plate and the feeding plate, and an impurity removing assembly is arranged on the side wall of the coal briquette crushing assembly. The coal crushing and impurity removing device has the advantages that coal can be subjected to pre-crushing and impurity removing operation, and the coal pretreatment capacity is improved.

The invention provides a VAE-ALSTM-based bridge structure state anomaly detection method and system, and the method comprises the steps: carrying out the standardization and sliding window segmentation of vibration monitoring data, extracting potential features through a variational auto-encoder, and carrying out the time sequence prediction and reconstruction in combination with an attention-enhanced long-short-term memory network, thereby achieving the detection of the abnormal state of a bridge structure. Fusing the prediction error and the reconstruction error to generate an abnormal score; a threshold value is automatically set through quartile distance statistics, and self-adaptive judgment under different bridge types is achieved; when the score crosses the boundary, real-time alarm is triggered; the system correspondingly comprises a data preprocessing and sample construction module, a VAE-ALSTM model construction module, a training stage prediction and reconstruction module, an error calculation and anomaly scoring module, a threshold setting module and an anomaly judgment and alarm module. The method and the system do not need manual threshold parameter adjustment, are high in precision and good in real-time performance, and can be widely applied to the fields of bridge health monitoring, operation and maintenance early warning and the like.

According to the rapid modeling method for the finite element of the bridge rod system unit disclosed by the invention, a clearer and more reasonable modeling method is constructed by combining rod system structure modeling and BIM modeling logic, and a user can obtain the finite element of the bridge rod system unit by modifying simple underlying data or utilizing a result formed in the method. And analysis and modeling are realized by effectively combining with other software at low cost. The method uses a Python language, and comprises the following steps of: 1, realizing attributes of editing classes by utilizing the Python language; 2, creating a material and a section instance; 3, the bridge structure is divided into different component instances corresponding to the bridge types, boundary information between different components is bound through the boundary class, and loads acting on the different components are determined through the load class; 4, packaging the axis class, and binding the component instance with the axis instance; 5, adding a calculation module, and carrying out mesh generation; 6, obtaining each subdivision point on the axis, and connecting the subdivision points to generate a corresponding unit set; and 7, establishing boundary and load examples.

The invention discloses a bridge cluster post-earthquake rapid evaluation method based on improved XGBoost. The method comprises the steps that firstly, a bridge cluster is classified, a bridge type is selected as a research object, modeling parameters are determined according to the selected bridge type, and parameter samples are expanded; then establishing a finite element model to extract output parameters related to bridge behaviors; according to the extracted output parameters related to the bridge behaviors, the bridges are divided into three classes to serve as bridge classification labels, and data expansion is carried out; performing classification model training on the obtained new training set by using an XGBoost model, and finally determining the XGBoost model; and using the determined XGBboost model, taking bridge parameters and seismic oscillation data as input, and outputting a classification label as a post-earthquake evaluation index / evaluation basis. According to the method, the efficiency and accuracy of bridge safety assessment after the earthquake are remarkably improved, and a rapid and reliable technical support is provided for emergency repair and recovery of the bridge after the disaster.

The invention provides a high-gas coal roadway rapid tunneling system and method, and the system comprises a spraying and drilling and anchoring integrated support tunneling and anchoring machine, an anchor rod reversed loader, a bridge type reversed loader, a self-moving tail and a gas extraction drill carriage, the spraying and drilling and anchoring integrated supporting digging and anchoring machine comprises a rack, a cutting part, a spraying mechanical arm, a drilling and anchoring integrated drilling arm, a telescopic sliding device, a spraying material box, an anchoring agent material box and digging-following gas monitoring equipment. By spraying and supporting the surface of the roadway, sealing of the surrounding rock surface of the roadway is achieved, the gas concentration increasing speed of the driving working face is slowed down, and meanwhile gas extraction operation in the tunneling process is dynamically carried out by monitoring the gas concentration of the driving working face. The supporting speed can be increased by adopting the drilling and anchoring integrated drilling arm.

The invention provides a bridge switch and a relay. The bridge switch comprises two static contacts and a bridge moving contact. Each static contact is provided with a first static contact and a second static contact at an interval; the bridge type movable contact comprises a rigid overcurrent bridge and a flexible overcurrent bridge, the rigid overcurrent bridge is provided with a first movable contact corresponding to the first static contacts of the two static contacts, and when the bridge type movable contact is disconnected from the two static contacts, the distance between the second movable contact and the second static contact is smaller than the distance between the first movable contact and the first static contact; the flexible over-current bridge is provided with an elastic deformation part, and is provided with a second movable contact corresponding to the second static contacts of the two static contact members, and the second movable contact is arranged at the elastic deformation part. The relay comprises the bridge switch. When the contact is applied, the contact resistance is small, the temperature rise is low, the contact loss is small, and the contact service life is longer.

The invention discloses an anti-shaking control method for a bridge type grab ship unloader based on input shaping and orbit planning, relates to the technical field of cranes, and constructs a bridge type grab ship unloader system dynamics model capable of describing variable amplitude motion, rotary motion and lifting motion. According to the starting point and the ending point, trajectory planning is conducted on the acceleration section, the constant-speed section and the deceleration section of the running process. The swing period is estimated according to the length of a steel wire rope from the front end of a trunk beam of the bridge type grab ship unloader to a hoisting center, shaping processing is conducted on input signals based on the swing period, and initial swing of the system is reduced. In the constant speed section, the deflection angle is obtained in real time, acceleration and deceleration control is conducted according to the size and direction of the deflection angle, and swing generated by real-time disturbance in the movement process is well restrained. According to the anti-swing control method, better anti-swing control can be achieved, the stability and safety of the bridge type grab ship unloader are improved, and the control method is simple, easy to implement in engineering and quite wide in engineering application prospect.

The invention discloses a bridge substructure modeling scheme generation method and device, equipment and a medium, and relates to the technical field of bridge engineering, and the method comprises the steps: obtaining bridge superstructure design input parameters, constructing substructure design task information, and generating design parameters through big language model reasoning; and a modeling script is automatically generated, and structural response calculation is carried out. Different modeling strategies are judged and executed according to the calculation result, finally, a target modeling scheme meeting the requirement is intelligently generated, design parameter generation and automatic modeling of the bridge substructure in a non-standard bridge type scene are achieved, and the design efficiency and accuracy are improved.

The utility model belongs to the technical field of glass fiber production, and particularly relates to a novel multi-drawing wire drawing machine head with a modular structure. The machine head comprises a machine head main shaft, an upper wire ring, a pull rod seat, a broken bridge type expansion sheet and a plurality of sections of sectional type aluminum rotary drums, expansion piece telescopic mechanisms are arranged between the upper wire ring and the sectional type aluminum rotary drum, between the sectional type aluminum rotary drum and the pull rod base and between every two adjacent sections of sectional type aluminum rotary drums. The expansion piece telescopic mechanism comprises a piston ring, a slope sliding block ring, a connecting rod sliding block, a connecting rod, a sliding block ring top spring, a sliding block tension spring and an expansion piece tension spring. According to the novel multi-split wire drawing machine head with the modular structure, the technical problems that the machining difficulty of an ultra-long aluminum rotary drum and an ultra-long expansion sheet is large, the machining quality cannot be guaranteed, and disassembly and assembly are difficult during assembly and maintenance are solved; and meanwhile, the control precision and the expansion piece stretching efficiency are improved, and the power consumption of the wire drawing machine is reduced.

The invention discloses a bridge health monitoring system which comprises a sensing layer, a transmission layer, a processing layer and an application layer which are in communication connection in sequence. The sensing layer synchronously collects structural mechanics, environmental influence and traffic load data through multi-source heterogeneous sensing nodes, and the sensing nodes adopt a solar energy and vibration energy double-source energy supply and low-power-consumption mechanism; the transmission layer adopts a'wireless private network + edge gateway 'mixed mode, and has data caching and breakpoint resuming functions; the processing layer analyzes data through a deep learning fusion algorithm based on an attention mechanism, and realizes dynamic early warning threshold adaptive adjustment in combination with a Bayesian reasoning model; and the application layer provides a visual interface, graded early warning and targeted maintenance decision suggestions. The system achieves the precise monitoring of the full life cycle of the bridge, improves the evaluation accuracy and system stability, reduces the operation and maintenance cost, provides scientific support for the safe operation and maintenance of the bridge, is suitable for the health monitoring scenes of various bridge types, and greatly improves the accuracy of the evaluation of the health state of the bridge.

The invention provides a concrete continuous rigid frame bridge temperature-induced deflection prediction and safety early warning method based on health monitoring, which aims at a concrete continuous rigid frame bridge type and extracts specific indexes reflecting structural performance based on mass measured data acquired by a bridge health monitoring system. Extracting section temperature gradient information of the concrete continuous rigid frame bridge through kernel principal component analysis, and performing wavelet decomposition on deflection data to extract temperature-dependent deflection; the structure performance change is reflected through the prediction model of the temperature-induced deflection, the long-term change rule of the bridge structure performance is effectively analyzed, and a bridge temperature-induced deflection index prediction model with a clear physical meaning is constructed; setting a bridge safety early warning threshold value based on the model prediction error, and performing multi-stage early warning on the bridge state by simply adjusting parameters according to the actual operation condition of the bridge structure and the requirements of bridge owners; the function of monitoring bridge health is realized, important guidance is provided for bridge operation management, and the system has a wide application prospect.

The invention discloses a structure health monitoring method based on a multi-parameter integrated sensor, relates to the technical field of bridge structure health monitoring, and solves the problems that in the prior art, bridge structure health detection is not comprehensive, and bridge structure response is separated from the actual use state. The method comprises the steps that a comparison bridge similar to a target bridge is matched according to bridge type data, bridge index data of the comparison bridge are analyzed, and a priority monitoring sequence of the target bridge is obtained through analysis; obtaining the maximum allowable load of the target bridge, and detecting the structural health condition of the target bridge according to the first priority monitoring target; analyzing the use condition of the target bridge according to the real-time monitoring data and the second priority monitoring target; the damage condition of the corresponding bridge floor of the target bridge is analyzed according to the bridge index data, whether the target bridge has the passing condition or not is judged, mutual hooking of the bridge structure and the use state is achieved, and then comprehensive detection of the bridge structure is achieved.

The utility model discloses a double amplification energy consumption mechanism used between railway pier beams and a railway, comprising a rotation amplification device, one end of which is arranged at the bottom of a main beam and the other end of which is arranged on a pier; one end of the bridge-type amplifying device is connected with the rotary amplifying device, the other end of the bridge-type amplifying device is connected with a bridge pier lug plate, and the end of the bridge pier lug plate is arranged on the bridge pier; the self-resetting energy consumption damping device is arranged in the bridge type amplifying device; the self-resetting energy dissipation damping device comprises a self-resetting assembly and an energy dissipation assembly, and the self-resetting assembly and the energy dissipation assembly are of an integrated structure. According to the mechanism, through mutual cooperation of the rotation amplifying device, the bridge type amplifying device and the self-resetting energy dissipation damping device, the energy dissipation capacity of a bridge structure is improved, the relative displacement between a pier and a pier beam is reduced, structural resetting after an earthquake and energy consumption in the earthquake are achieved through self-resetting energy dissipation, damage to components of a bridge main body structure is avoided, and the service life of the bridge is prolonged. Damage control and post-earthquake function restorability of the bridge structure are achieved.

The invention relates to the technical field of sewage treatment, in particular to a bridge type sand sucker with a sand suction pump lifting function, the bridge type sand sucker comprises a walking beam and a sand suction pump, two sets of symmetrically arranged fixing plates are fixedly mounted at the bottom end of the walking beam, and a moving plate transversely moving at the bottom of the walking beam is arranged between the two fixing plates; two first electric push rods are fixedly mounted at the bottom ends of the two moving plates correspondingly, a mounting frame is fixedly mounted at the bottom ends of the two first electric push rods jointly, two sliding grooves which are symmetrically formed are formed in the mounting frame, and limiting blocks are slidably arranged in the two sliding grooves correspondingly; the sand suction pump is arranged between the two limiting blocks and is limited through the two limiting blocks. The two electric telescopic rods slide on the annular sliding rail, so that the two clamping plates apply rotating force to the limiting ring to take out the limiting ring from the connecting cylinder, the limiting block slides in the sliding groove in a matched mode, the sand suction pump is conveniently and rapidly replaced and installed, and waste of a large amount of time is avoided.

The present invention belongs to the technical field of piezoelectric actuators, and specifically relates to a bridge-type piezoelectric driven linear actuator and a control method. The bridge-type piezoelectric driven linear actuator includes an upper cover, an outer shell, a flexible hinge micro-motion mechanism, a push rod and a piezoelectric ceramic drive. The outer shell is provided with a flexible hinge micro-motion mechanism, and the flexible hinge micro-motion mechanism is provided with a piezoelectric ceramic driver and a push rod. Grooves are provided on both sides of the outer shell corresponding to the two ends of the push rod, and the two ends of the push rod extend to the outside of the outer shell through the grooves on the outer shell. The flexible hinge micro-motion mechanism is provided with a driving groove, and the push rod is located in the driving groove on the flexible hinge micro-motion mechanism. A ball plate is provided between the push rod and the wall of the driving groove to make them in Hertzian contact. Its beneficial effects are: the structure is simple and compact, and the motion control of two drive heads in two directions is realized by a piezoelectric ceramic driver, the cost is low, and the control method is simple.

The invention discloses a bridge vortex-induced vibration sensitive pneumatic structure detection method and system based on three-dimensional laser scanning, and belongs to the technical field of bridge engineering and structural health monitoring. Three-dimensional point cloud data of a bridge structure are obtained through three-dimensional laser scanning, and geometric features are extracted after preprocessing; a pre-trained machine learning model is used for identifying the type of the component, shape comparison with a standard bridge type database is carried out, and whether the part has sensitive aerodynamic characteristics easily causing vortex vibration or not is comprehensively judged; for the sensitive characteristics, vortex-induced vibration risk parameters are calculated based on geometric parameters and compared with the inherent dynamic characteristics of the bridge to determine the risk level; for non-sensitive features, the evaluation is terminated. The method is mainly used for rapid evaluation of vortex-induced vibration risks in bridge design, construction and operation stages, provides technical support for bridge safety monitoring and maintenance, effectively prevents vortex-induced vibration accidents, and improves bridge durability and operation safety.

The utility model discloses a sealing heat preservation structure of a bridge type furnace body, the bridge type furnace body is formed by splicing a plurality of heat preservation plates, a splicing position is arranged between every two spliced heat preservation plates, and the sealing heat preservation structure of the bridge type furnace body comprises sealing cotton and a strut angle plate; the sealing cotton is laid on the side, facing the interior of the bridge type furnace body, of the splicing position and the side, back to the interior of the bridge type furnace body, of the splicing position so as to fill or cover a gap of the splicing position, and a blocking part is formed. The strut angle plate is arranged on the outer side of the blocking part and fixedly connected with the heat preservation plate so as to tightly press the sealing cotton. According to the bridge type furnace body, the sealing cotton is creatively laid at the splicing position of the heat preservation plates, the sealing cotton is tightly pressed and fixed through the angle supporting plates, gaps at the splicing position are sealed, heat in the bridge type furnace body is prevented from escaping through the gaps at the splicing position, and the problem of heat leakage of the bridge type furnace body is effectively solved.

The invention provides a bucket wheel automatic reversing mechanism and a bridge type bucket wheel reclaimer, and relates to the field of industrial equipment, the bucket wheel automatic reversing mechanism comprises a reclaiming support arm, a reclaimer wheel, a reclaiming mounting seat, a reclaiming bucket wheel body, a reclaiming connecting block, a starting connecting block, a bucket wheel reversing mechanism, a reversing protection mechanism and an ore conveying mechanism; the material taking machine wheel is fixedly connected to the inner side of the material taking supporting arm. The material taking mounting seat is fixedly connected to the outer side of the material taking machine wheel; the material taking hopper wheel body rotates on the outer side of the material taking machine wheel; the material taking connecting block is fixedly connected to the rear side of the material taking hopper wheel body. The starting connecting block is fixedly connected to the rear side of the material taking connecting block; the bucket wheel reversing mechanism is arranged on the starting connecting block; the reversing protection mechanism is arranged on the outer side of the material taking machine wheel; the ore conveying mechanism is arranged on the inner end face of the material taking supporting arm. Through the bucket wheel reversing mechanism, the orientation of the wheel body of the material taking hopper is adjusted, and through the ore conveying mechanism, ore falls onto a conveying hopper. The problem that ores are accumulated in the funnel is solved.

The utility model discloses a bridge type eccentric water distributor with accurate measurement and regulation and reliable operation, which comprises a positioning sleeve and a water distributor main body, the positioning sleeve is fixedly connected with the water distributor main body, the positioning sleeve is provided with a positioning notch, and the inner wall of the water distributor main body is provided with a shunt ring; an adjustable water distribution assembly is arranged in the flow dividing ring and provided with a rotary regulation and control water nozzle. The upper end of the flow dividing ring is rotationally connected with a transmission pipe, and the transmission pipe is provided with an adjusting notch. The transmission pipe is connected with the adjustable water distribution assembly through an acceleration transmission mechanism. The utility model has the advantages of simple structure, few transmission structures, high reliability, easiness in processing and low production cost; the acceleration transmission mechanism is adopted to adjust the opening degree of the water nozzle of the water distributor, the sudden stop torque value of the measuring and adjusting instrument can be increased, the instrument can be stopped in time when the water amount is adjusted and controlled in place, rapid and accurate measuring and adjusting are achieved, and the measuring and adjusting success rate is increased.

The utility model discloses a stone bridge type cutting machine which comprises a placing table, two supporting seats and a cutting device, the two supporting seats are located on the two sides of the placing table, the cutting device is located above the placing table, and a cross beam is arranged on the two supporting seats. A first power part used for driving the cross beam to slide in the length direction of the supporting seat is arranged on the supporting seat, a sliding seat is slidably arranged on the cross beam, a second power part used for driving the sliding seat to slide in the length direction of the cross beam is arranged on the cross beam, and a sliding plate is slidably arranged on the sliding seat; according to the stone cutting device, the transmission piece is arranged, after stone is cut for the first time, the cutting device is driven by the second motor to rotate by 180 degrees, the cutting device can achieve reciprocating cutting, a cutting blade does not need to be returned to one side of an original point, and therefore the stone cutting device is simple in structure and convenient to use. Therefore, the processing waiting time is saved.

The invention discloses a bridge vehicle load inversion method and system based on dynamic deflection, and the method comprises the following steps: constructing a bridge information database which stores bridge structure type information, vehicle actuation deflection variation amplitudes, vehicle load data, and probability arrays of vehicle load data corresponding to different vehicle actuation deflection variation amplitudes; reading to-be-inverted dynamic deflection monitoring data, and calculating the change amplitude of the vehicle actuating deflection of the to-be-inverted dynamic deflection monitoring data; reading corresponding vehicle load data and a probability array according to the current bridge type information and the vehicle actuation deflection variation amplitude of the dynamic deflection monitoring data to be inverted; and taking the probability of the vehicle load data as a weight, determining an interval in which the vehicle load is located by adopting weighted sampling, and determining the vehicle load of the dynamic deflection monitoring data to be inversed in the interval by adopting simple random sampling. According to the method, the importance evaluation value of the influence of the vehicle on the crack is further constructed based on the vehicle actuation deflection change amplitude, the crack development is tracked and positioned, and the vehicle load effect evaluation is realized.

The invention belongs to the field of bearings, and particularly relates to a bearing with a load measuring function. In order to accurately plan the maintenance work of the bearing and guide the improvement of the bearing, the invention provides the bearing with the load measurement function, and the bearing comprises a retainer and a roller; the retainer is provided with a contact surface used for being in contact with the roller, a force sensor is arranged on the contact surface, and the force sensor is used for measuring the contact load between the roller and the retainer; the retainer comprises a coating sensor, or a bridge type strain gauge is mounted on the retainer, and the coating sensor or the bridge type strain gauge is used for measuring the deformation degree of the retainer; a control module is further fixedly connected to the holder and used for transmitting data measured by all the sensors to an upper computer. The relationship between the deformation degree of the retainer and the contact load between the roller and the retainer is measured through a force sensor and a bridge type strain gauge (coating sensor), so that the maintenance work of the bearing is conveniently planned, and the bearing improvement is conveniently guided.

The invention discloses a bridge type working barrel for synchronous injection and production of a horizontal well in the same well, and relates to the technical field of oilfield development. According to the bridge type working barrel for synchronous injection and production in the same well of the horizontal well, by arranging the fixed barrel body, the bridge type working barrel body, the injection water bridge type channel, the produced liquid flowing channel, the telescopic sleeve and the sealing barrel body, the independent produced liquid flowing channel and the injection water bridge type channel are designed; the purpose that injected water and produced liquid are injected and produced through respective independent flow channels is achieved, the problem that oil production injected water and produced liquid flow channels at the two end sections of water injection in the middle section of the horizontal well interfere with each other can be effectively solved, and the applicability of the horizontal well same-well synchronous injection and production process pipe column is further widened. The bridge type working barrel body has the advantages of being simple in design, easy and convenient to operate, good in sealing performance and the like, the working environment of a low-permeability oil field horizontal well development site is better met, and meanwhile production cost is reduced.

The utility model provides an axle bridge type self-guiding independent rotating wheel running gear with an external axle box and a locomotive vehicle. The axle bridge type self-guiding independent rotating wheel running gear comprises independent rotating wheels, half axles, rolling bearings, guiding rotating arm beams, positioning plates, connecting plates, axle bridges, elastic suspensions, side beams, cross beams, transverse rods and transverse shock absorbers. An angle adjusting hole is formed in the positioning plate and connected with a sliding groove in the connecting plate, a certain dip angle can be formed between the connecting line of the circle centers of the upper hole and the lower hole of the positioning plate and the vertical line, and by adjusting the dip angle, the linear centering performance and the curve passing performance of the walking part of the independent rotating wheel are improved, and the running safety of the vehicle with the independent rotating wheel is improved.

The invention discloses a cross beam assembly. A cross beam body is provided with a horizontally-arranged first plane. The cross beam adjustor is used for supporting the cross beam body and adjusting the height or the inclination angle of the cross beam body; the cross beam adjuster comprises a first seat body, a second seat body, a first screw, a first adjusting stud and a belleville spring; the first screw is used for connecting the cross beam body with the first adjusting stud, and the first adjusting stud is in abutting fit with the first plane; at the first section end of the cross beam body, a plurality of first screws in the Y direction are rigidly connected with the first seat body through first adjusting studs; at the second cross section end of the cross beam body, a plurality of first screws in the Y direction are elastically connected with a second seat body through a belleville spring and a first adjusting stud in sequence; at the second section end, at least one first screw close to the symmetry axis position of the multiple belleville springs is rigidly connected with the first base body through a first adjusting stud. On the premise that the precision requirements of all parts of the cross beam assembly are met, installation is simplified.

The invention relates to the technical field of numerical control machine tool machining, in particular to a bridge type five-axis gantry machining center with an automatic exchange table, which comprises a worktable base, an exchange table base and a guide mechanism, the top of the exchange table base is provided with an exchange table which can be butted with the worktable base, and the guide mechanism is arranged between the exchange table base and the exchange table and is used for guiding the exchange table to move. Comprising a guide rail, a sliding base arranged on the guide rail in a sliding mode, a roller supporting assembly arranged on the sliding base in a stepped mode and an oil supply assembly used for driving lubricating oil to circularly flow in the sliding base. The device has the beneficial effects that the multiple roller supporting assemblies are arranged on the sliding base in a stepped mode, the roller supporting assemblies can abut against the guide rails when pressed, and the abutting number of the roller supporting assemblies can be adjusted in a self-adaptive mode according to the weight of the exchange workbench in the clamping stage of the exchange workbench; therefore, the weight of the pin roller intervening in work is matched with that of the workpiece, the workpiece is stably supported, and meanwhile the unnecessary contact area is reduced so as to reduce friction.

The invention belongs to the technical field of lifting equipment control, and particularly relates to a modeling method and a control method for a dynamic model of double-bridge type lifting equipment, and a dynamic equation of a five-degree-of-freedom double-bridge type crane is constructed through a Lagrange method. Constructing a geometric constraint relationship between the trolley I and the trolley II in the direction parallel to the bridge frame and the vertical direction, constructing a kinetic model of the double-bridge crane by combining the kinetic equation and the geometric constraint relationship, and converting the kinetic model into a universal model; based on the general model, a first error function is constructed according to the difference between the actual position and the expected position, and a virtual controller is constructed based on the first error function; and constructing a second error function based on the virtual controller, and constructing an actual controller based on the first error function, the virtual controller and the second error function. According to the technical scheme, overall modeling is carried out on the system through the constraint relation between the two trolleys, the quality of the lifting hook is considered during modeling, and the singular problem is solved.

Methods of generating computational models representative of bridges include receiving a first user input representative of a bridge, receiving a second user input representative of the bridge, generating a three-dimensional (3D) bridge model based upon the second user input, generating a computation fluid dynamics (CFD) model representative of an area surrounding the bridge, and performing a CFD analysis on the mesh model to generate output results. The first user input includes a bridge type selection from a plurality of stored bridge types. Each of the plurality of stored bridge types correlates to a plurality of bridge parameters. The second user input includes a plurality of bridge parameters correlating to the first user input.

The invention relates to the field of slag crane travelling cranes, in particular to slag crane travelling crane equipment for a waste incineration power plant and a using method. The invention aims to solve the technical problems that when a bridge type slag crane is used for hoisting garbage through a mechanical grab bucket, the mechanical grab bucket shakes and swings, and the swinging mechanical grab bucket can increase the transfer time, reduce the operation efficiency, cause extra burden and abrasion to a mechanical structure of the bridge type slag crane and even cause safety accidents. Comprising a steel wire rope, a hoisting mechanism is fixedly connected to the end of the steel wire rope, a buffering mechanism is rotationally connected to the outer side of the steel wire rope, and a grab bucket mechanism is arranged on the lower side of the buffering mechanism. By arranging the buffering mechanism, two buffering balls slide in a transverse cylindrical sliding groove of a shell in a reciprocating mode to extrude and stretch buffering springs on the two sides, the two buffering balls slide in a reciprocating mode to drive two linkage bases to slide in an oval sliding groove of the shell in a reciprocating mode, and at the moment, four buffering wheels of the buffering mechanism are kept at the same height all the time.