1165 results about "Gantry crane" patented technology

The invention provides an overhead and portal crane lifting appliance control method based on multi-stage model predictive control, and relates to the field of data processing. The method comprises the following steps: firstly, acquiring a control parameter and an initial state variable so as to define an operation boundary and an initial state, and establishing a dynamic model containing a coupling relationship among a trolley acceleration, a sling rope length acceleration and a sling swing angle; acquiring obstacle distribution by using space sensing equipment, and calculating the dynamic safety height of the lifting appliance by combining obstacle parameters and control parameters; judging whether the lifting appliance is in an obstacle avoidance stage or a target tracking stage according to the initial state variable and the dynamic safety height; constructing a model prediction controller and dynamically adjusting a state weight matrix and a control input weight matrix; finally, a control input sequence is generated through an optimization algorithm, and track safety and attitude stability control of the lifting appliance is achieved. According to the technical scheme, the swing angle of the lifting appliance is restrained, meanwhile, the obstacles are effectively avoided, and the safety of the lifting appliance in the whole operation process is guaranteed.

The utility model discloses a rapid positioning and grabbing device of a container portal crane, and relates to the technical field of cranes. The clamping device comprises a fixing plate, symmetrically-distributed clamping blocks are arranged at the four corners of the fixing plate in a penetrating mode, the clamping blocks are in an L shape, a first connecting plate is fixedly arranged at the ends, close to the fixing plate, of the clamping blocks, and a second connecting plate is rotationally arranged at the end, away from the clamping blocks, of the first connecting plate. First fixing blocks are fixedly arranged at the ends, away from the first connecting plate, of the two second connecting plates. Through mutual cooperation of a fixing plate, a clamping block, a first connecting plate, a second connecting plate, a first fixing block, a second fixing block, a first positioning plate, a rotating rod, a rotating wheel, a positioning rod, a third connecting plate, a connecting rod, a first bevel gear, a second positioning plate, a second bevel gear and a first motor, a clamping piece is driven by the motor to rotate, and therefore a container is grabbed; and a pneumatic mechanism is not needed, the structure is simple, and operation is convenient.

The invention discloses a large transformer auxiliary assembling platform, which comprises mounting racks, a lifting platform, a lifting mechanism and a sleeving mechanism, two groups of mounting racks are mounted on the ground, the two groups of mounting racks are oppositely arranged, a positioning and clamping assembly for an iron core is arranged between the two groups of mounting racks, and the positioning and clamping assembly can be lifted and lowered; a lifting platform capable of ascending and descending is arranged on each group of mounting frames, a lifting mechanism is arranged between the two groups of mounting frames, two ends of the lifting mechanism are mounted on the two groups of mounting frames, the lifting mechanism ascends and descends on the mounting frames, sleeving mechanisms are arranged on the two groups of mounting frames, and a winding sleeves a phase column through the sleeving mechanisms; when the winding is nested, the lamination at the top of the transformer iron core and the upper clamping piece are lifted, so that a joist barrow is not needed for lifting and dismounting, meanwhile, the upper clamping piece and the lamination are lifted, and after the winding is nested, the lamination and the upper clamping piece are convenient to mount.

The invention relates to the technical field of image recognition, in particular to a method and system for early warning below a portal crane, and the method comprises the steps: obtaining site environment sensing data, constructing a space map, and recognizing the position and motion state of equipment in real time; predicting an equipment motion track and a load swing range, and generating a predicted dangerous area; image acquisition devices are installed at a plurality of fixed positions, field images are acquired, an image recognition model is used for detecting a target, and the spatial position and the posture state of the target are obtained; tracking a target trajectory based on a motion estimation model and predicting a future position of the target trajectory; dynamically switching the image acquisition devices according to the motion state of the equipment; and comparing the future position of the target with the predicted dangerous area in real time, when the future position and the predicted dangerous area coincide, carrying out potential interference prediction, calculating predicted interference time, and carrying out grading processing in combination with the attitude state of the target. According to the invention, equipment dynamic perception and personnel behavior prediction are realized, and the intelligent protection capability of the operation area is improved.

The invention provides a tire crane automatic control system and method based on embedded edge calculation, and relates to the technical field of port automation, the tire crane automatic control system comprises a sensing and detecting layer used for collecting motion states and operation environment information of a cart, a trolley and a lifting appliance of a tire crane in real time; the core control layer is used for processing sensor data in real time and generating a control instruction; the action execution layer comprises a PLC gateway, a main control PLC and a driving motor, the PLC gateway communicates with the core control layer and is used for receiving a control instruction, and the main control PLC drives the motor to execute corresponding actions of a cart, a trolley and a lifting appliance; and the task management layer comprises an intelligent remote control console, is in communication connection with the core control layer, and is used for issuing the operation task instruction to the core control layer and receiving the system state data from the core control layer. Unmanned operation of the tire crane can be achieved, and a complete technical base is provided for port automation.

The invention relates to the technical field of crane control, and discloses a long-distance collaborative operation method for multiple gantry cranes, which comprises the following steps: constructing a global coordinate system; acquiring position data of dynamic equipment of each crane in real time and mapping the position data to a global coordinate system to form an equipment coordinate set; synchronously processing all equipment coordinates through a central processing unit, and generating a position sharing data set; meanwhile, environment obstacle data are collected and mapped to a global coordinate system, and spatial constraint conditions are established; generating a first path scheme by adopting a collaborative planning algorithm based on the position sharing data and the spatial constraint condition; monitoring the operation deviation in real time in the execution process, and obtaining an optimized second path scheme through deviation correction; and finally, dynamically monitoring environment change, triggering obstacle avoidance path updating when the environment change exceeds a preset threshold value, and outputting a collaborative operation scheme. According to the method provided by the invention, multi-machine cooperative path planning and dynamic obstacle avoidance under a cross-spatial scale are realized, the conflict risk is reduced, and the operation continuity and safety are improved.

The invention discloses a single gantry crane dispatching system based on an intelligent optimization algorithm. The single gantry crane dispatching system comprises an urgency degree calculation module, a task urgency degree calculation module and a task urgency degree calculation module, the future task prediction module is used for determining a prediction task set through a sliding time window and calculating the discount urgency degree of a prediction task; the path planning and task sorting module is used for modeling a task scheduling problem into a state transition problem on a search tree, and gradually exploring a combined space of a task execution sequence and a moving path in the search tree by adopting an improved A * algorithm under the guidance of urgent degree discount cost to obtain an optimal task sequence; the self-adaptive parameter adjusting module is used for optimizing parameters on line based on reinforcement learning; and the event-driven control module is used for responding to task arrival, periodic refreshing, abnormal events and task completion events through the message queue and triggering dynamic rescheduling. According to the method, the problems of dynamics, diversity and burstiness of tasks in actual operation can be effectively solved, and the scheduling efficiency of large-scale logistics equipment is improved.

The invention relates to the technical field of gantry cranes, in particular to a gantry crane stroke position accurate detection device which comprises two symmetrical positioning rails, pulley seats, a gantry crane frame, a mounting frame, fasteners and anti-skid sleeves, positioning pin holes are symmetrically formed in the tops of the two positioning rails in the axial direction, and the pulley seats are arranged on the pulley seats. Pulley seats are slidably connected to the tops of the positioning rails, a gantry crane frame is mounted between the two pulley seats, a mounting rack is arranged on the bottom surfaces of the middles of trusses of the two pulley seats, fasteners are connected to the two sides of the mounting rack, anti-skid sleeves are arranged at the bottoms of the fasteners on the two sides, and the anti-skid sleeves are slidably connected with the upper parts of the positioning rails. Rigid mechanical constraint is formed through the two-way guide rails and the anti-skid wheels on the two sides, the deviation trend of the gantry crane in the walking process is forcibly corrected, the operation stability is improved, and position measurement errors caused by track deviation are avoided.

The invention relates to a calibration installation method and system for an underwater square block, and belongs to the technical field of underwater square block installation. The calibration and installation method of the underwater square block comprises the steps of square block calibration, square block hoisting, navigation route generation and square block hoisting guidance. Wherein the square block calibration step comprises the following steps: after the square block is prefabricated, mounting a target on the top surface of the square block, scanning the top surface of the square block and the target arranged on the top surface of the square block through a three-dimensional laser scanner at the top of the gantry crane, and obtaining the size parameters of the top surface of the square block and the relative position relationship between the feature points of the target and the top surface of the square block. According to the calibration and installation method of the underwater square block, the size parameters of the square block and the position of a target feature point are accurately obtained through a three-dimensional laser scanner, and a reliable data basis is provided for subsequent hoisting; the measurement and control device monitors the position and posture of the square block in real time and automatically generates a navigation route in combination with design position coordinates, and it is ensured that the square block can be accurately hoisted to the target position.

The invention relates to the technical field of three-dimensional modeling, in particular to a three-dimensional rapid modeling method and system for a gantry crane. The method comprises the following steps: obtaining structural parameter template data and installation site wind condition data of the gantry crane; establishing a parameterized geometric model template according to the structural parameter template data, and determining a wind load sensitive part distribution diagram in combination with the wind regime data of the installation site; dividing structural modeling precision grades according to the wind load sensitive part distribution diagram, and generating a differentiated grid density distribution scheme; constructing multi-precision hybrid modeling framework data according to the differentiated grid density distribution scheme and the parameterized geometric model template; key geometric feature parameters are extracted based on multi-precision hybrid modeling framework data, and a parameter adaptive adjustment rule is established according to a wind load sensitive part distribution diagram; according to the method, geometric weak points are positioned through wind load pre-evaluation, local grid encryption and geometric optimization are automatically executed, and the reliability of model safety evaluation is improved.

The invention relates to an intelligent trestle control system for a molten iron combined transportation dam-crossing railway, which comprises a monitoring device and a plurality of subsystems, and is characterized in that each subsystem comprises a water level measuring device for measuring the water level condition in real time; the intelligent electric hydraulic mechanism is used for automatically adjusting the height of the bridge pier according to the real-time water level condition so as to adjust the height of the trestle; the gantry crane control system is used for controlling transportation of containers between a railway train and a cargo ship and comprises the steps that after the cargo ship is parked on one side of a trestle, the containers on the cargo ship are hoisted to the train parked on the trestle, or the containers on the train parked on the trestle are hoisted to the cargo ship parked on one side of the trestle; the rapid gate opening and closing device is used for controlling the gate opening and closing state of the flood control gate groove section based on the real-time water level condition; and the monitoring device is used for being connected with the subsystems through the multi-modal data fusion processor and executing cooperative control.

The invention discloses a hydraulic lifting container gantry crane which comprises a gantry crane main beam, a movable trolley frame is arranged on the gantry crane main beam, two trolley wheel sets in rolling contact with the gantry crane main beam are installed on each of the left side and the right side of the bottom of the trolley frame, and a container lifting appliance is arranged below the trolley frame. Through the driving of the hydraulic cylinder and the design of the pulley blocks, the distance from the lifting point of the lifting appliance to the highest point of the crane is reduced to be less than or equal to 3.2 m, under the safety distance of 8.3 m clearance, the lifting height of 5000 mm can still be realized, the problem of low clearance scene pain points is solved, when the workshop clearance is relatively high, four movable pulley blocks are selected, and when the workshop clearance is only 8.3 m, a container with the full load of 20 feet needs to be carried. The lifting requirement can be met by switching to six movable pulley sets, the whole lifting mechanism does not need to be replaced, the gantry crane is suitable for carrying scenes of containers with different clearances and different specifications, and the flexibility of the gantry crane is far better than that of a traditional winch type gantry crane.

The invention discloses a power control system of a container gantry crane, which relates to the technical field of crane power control, and is characterized in that operation condition data of a modularized lithium battery is acquired, the health state is evaluated, basic battery state information is formed, a short-period operation evaluation model is constructed, and a load prediction curve is output; the method comprises the following steps: carrying out modular battery management, short-period working condition prediction, dynamic power distribution and feedback scheduling, distributing power, adjusting the priority of each driving system, matching a power demand, planning a feedback path, identifying a replacement module, executing a hot plug operation, collecting real-time state data, and carrying out feedback processing. The load prediction of the driving system, the accurate evaluation of the battery state and the optimization of the energy path are realized; and by combining a hot-plug battery replacement structure and closed-loop monitoring of the whole machine state, the power supply regulation and control flexibility and the system operation stability are improved, and the method is suitable for power control of the container gantry crane in a high-frequency operation scene.

The invention belongs to the technical field of bridge engineering, and discloses an expressway bridge precast beam field progress data acquisition and comprehensive management method. Comprising the steps that key material feature information and site basic coordinate information corresponding to a precast beam field are obtained; carrying out data acquisition on gantry crane equipment in the precast beam field based on the field basic coordinate information and the key material feature information to obtain an original equipment operation data stream; the process state is judged in real time based on the original equipment operation data flow, a process state conversion sequence is obtained, and an overall production condition report is generated and obtained based on the process state conversion sequence; performing optimal configuration and scheduling planning on resources in the precast beam yard based on the overall production condition report to obtain a corresponding resource scheduling scheme; a production capacity analysis report and progress optimization suggestions are given; automatic monitoring and intelligent analysis of the production progress of the precast beam field are achieved, the production efficiency and the resource utilization rate are remarkably improved, and manual recording errors are reduced.

The invention provides a reinforcement cage autonomous manufacturing, transferring and installing device and method, and relates to the field of reinforcement cage manufacturing and installing.The device comprises an integrated crawler-type carrier provided with a material storage bin, the material storage bin comprises a main reinforcement storage area and a stirrup storage area, and a sorting mechanical arm is arranged in the material storage bin; the hydraulic erecting bearing platform comprises a bearing platform frame with the tail end hinged to the integrated crawler-type carrier and a hydraulic system used for driving the bearing platform frame to be overturned to the vertical state. Each gantry crane robot comprises a rectangular-ambulatory-plane frame installed on the bearing platform frame in a sliding mode, a first universal mechanical arm, a second universal mechanical arm and supporting claws, the first universal mechanical arm and the second universal mechanical arm are arranged on the inner walls of the two sides of the rectangular-ambulatory-plane frame and used for grabbing the main reinforcements and the stirrups, the supporting claws are arranged on the other two side walls of the rectangular-ambulatory-plane frame and used for fixing the main reinforcements, and a welding gun is arranged on the first universal mechanical arm; a hydraulic pulley used for driving the hoop reinforcement cage to rotate and advance in the concentric-square-shaped frame is arranged in the concentric-square-shaped frame. The manufacturing, transferring and mounting efficiency of the reinforcement cage can be improved.

An automatic transport system for a container terminal, and an unloading method and a loading method. In the transport system, a terminal has a sea side area (100), a land side area (200) and a yard area (300), wherein the yard area (300) is divided into two parts: an unloading yard area and a loading yard area, the unloading yard area being provided with several first transport channels (203), and the loading yard area being provided with several second transport channels (204); the yard area (300) is provided with several first gantry cranes (206) stretching across the first transport channels (203), and several second gantry cranes (207) stretching across the second transport channels (204); and the yard area (300) is provided with several horizontal container transport vehicles (201), and a running trajectory of the horizontal container transport vehicles (201) is annular. The present invention can improve the operation efficiency of the terminal, reduce the construction and maintenance costs, and improve the safety of the terminal.

The invention discloses a modular assembly type hydraulic jacking portal crane which comprises a rail device, a hydraulic jacking device and a hydraulic jacking device. The number of the walking devices is two, the walking devices are movably arranged on the left track and the right track respectively, each walking device comprises a power unit and a walking vehicle, and the power units are connected to the walking vehicles in a replaceable mode and used for driving the walking vehicles to move along the track devices; the supporting device is detachably arranged on the walking vehicle; the cross beam is detachably arranged on the supporting device; wherein the rail device, the walking device, the supporting device and the cross beam are all of modular structures and can be adaptively adjusted and assembled according to needs, and the driving friction force of the power unit relative to the rail device can be adjusted. The crane can efficiently and conveniently complete manual installation, hoisting operation and disassembly transition in a high-floor room and other scenes with limited space, the driving friction force can be accurately and efficiently adjusted, and efficient and safe load hoisting can be achieved.

The invention relates to a container unattended weighing method, relates to the field of intelligent management of port logistics, and provides a whole-process unattended solution aiming at the defects that in the prior art, a container number depends on manual verification, container identification equipment is high in cost, a service type needs to be judged manually, and weighing data is tampered easily. The core of the method comprises the steps that a wharf operating system pre-binds a license plate number, and a loading and unloading equipment (gantry crane, reach stacker and stacker) equipment terminal confirms a three-level binding relation from a box number to a specified vehicle number and an operation number; when a vehicle is loaded on the weighbridge, the weighbridge automatically calls binding data through license plate recognition, and container entity recognition requirements are avoided; automatically judging a service type according to a vehicle moving line; and associating double weighing data based on three-level mapping, and calculating net weight in real time to generate a tamper-proof operation record. According to the method, unmanned operation in the whole weighing process is realized, the efficiency is improved, the hardware cost is reduced, the operation data has complete traceability, and key technical support is provided for harbor intelligence.

The invention provides a collaborative operation real-time data exchange system and method suitable for a collaborative hoisting scene of multiple portal cranes, and relates to the field of portal crane control. The system comprises a gantry crane control unit, a shared memory module, a central scheduling control module, a safety monitoring module and a system database. According to the method, a shared memory with partitions and a communication link are established through initialization, instructions are issued through central scheduling when tasks are executed, state synchronization and autonomous fine adjustment of all the gantry cranes are achieved based on the shared memory, the data transmission amount is reduced by combining event driving and differential synchronization, and the safety monitoring module monitors in real time and triggers the fault-tolerant process. According to the scheme, the real-time performance, the safety and the expansibility of collaborative operation are improved, and the method is suitable for multi-machine collaborative hoisting in scenes such as large ports and wharfs.

The invention relates to the technical field of cranes, and particularly discloses an anti-deflection portal crane based on a port and a method, the anti-deflection portal crane comprises a portal frame, a moving trolley is arranged on the portal frame, a lifting appliance is arranged at the bottom of the moving trolley, the lifting appliance comprises two sets of rigging, each set of rigging comprises two ropes, and a winding and unwinding device is arranged at the tops of the two ropes; the winding and unwinding device is used for controlling winding and unwinding of the rope; a balancing weight is arranged in the middle of each set of rigging, and the two ropes are fixed through the balancing weights; at least one tightening rope is arranged on one side of each group of rigging; in each set of rigging, the tops of the two ropes and the top of the tightening rope are connected with the top of the moving trolley. According to the invention, a polyhedral frame structure is formed by the tightening ropes and the ropes of the two groups of riggings, so that rigid constraint can be formed, horizontal and vertical swinging of the container in the hoisting and moving process can be effectively counteracted, the smoothness and safety of port operation can be improved, and the risk of collision or damage caused by shaking of goods is avoided.

The invention belongs to the technical field of cranes, and particularly discloses an automatic anti-twisting device for a gantry crane lifting appliance, which comprises a lifting transverse plate and two lifting seats arranged on the lifting transverse plate, balance ropes are arranged on two sides of the lifting transverse plate, and two anti-twisting mechanisms are arranged on the lifting transverse plate and used for preventing the lifting appliance from twisting when the lifting transverse plate twists. According to the anti-twisting device, the two balance ropes are arranged, one balance rope tensions the other balance rope and loosens the balance rope, twisting of the hanging transverse plate is avoided, a tensioning rope is arranged on the hanging transverse plate, and a limiting mechanism for tensioning the hanging transverse plate is arranged on the hanging transverse plate. The two balance ropes are respectively connected with the same winch, one balance rope is quickly tightened, the torsion trend of the lifting appliance is accurately limited through the generated constraining force, and the posture of the lifting appliance is stabilized like a positioning anchor point, and the other balance rope is correspondingly loosened, so that a buffer space is reserved for displacement generated by inertia of the lifting appliance.

The invention relates to the technical field of gantry crane dynamic operation safety testing, in particular to a crane dynamic operation safety testing method which comprises the following steps: step 1, multi-dimensional static calibration; step 2, fault coupling simulation; step 3, structured data processing; step 4, coupling judgment; step 5, source tracing; and step 6, carrying out targeted rectification. A multi-dimensional static calibration, fault coupling simulation and targeted rectification scheme is designed according to the structure and working conditions of cart one-way walking, main beam-supporting leg rigid welding, long track bearing, bilateral braking and open-air operation of the gantry crane. The limitation of insufficient adaptability to the integrated structure of the gantry crane in the prior art is broken through, and the problem of test distortion caused by neglecting equipment attributes is solved. Aiming at the characteristics that the box type girder of the gantry crane is large in torsional rigidity, small in torsional deformation and mostly caused by internal defects or uneven external stress, progressive traceability of internal defect detection, external load checking and connection state checking is adopted.

The embodiment of the invention provides an overlapping type station construction system. The overlapping type station construction system comprises a first assembling trolley, a second assembling trolley and a gantry crane. Each of the first assembly trolley and the second assembly trolley comprises a frame, a wheel rail walking device, a side wall mounting device and an operation platform; the wheel rail walking devices are located at the bottoms of the trolleys, and the wheel rail walking devices in the two trolleys are arranged on rails on the two sides of a station bottom plate respectively and can walk longitudinally along the rails. The side wall mounting devices are used for carrying the side wall blocks, and the side wall mounting devices of the two trolleys are used for sequentially splicing the side wall blocks to the two sides of the station to form side walls; the gantry crane is used for hoisting the side wall blocks to the first assembly trolley or the second assembly trolley. According to the laminated station construction system provided by the embodiment of the invention, the laminated station can be assembled, and the construction efficiency is relatively high.

The invention relates to the field of port container loading and unloading operation auxiliary control, and discloses a container truck guiding and auxiliary container grabbing and releasing method and system based on a laser radar. The method comprises the following steps: carrying out real-time three-dimensional perception on a container truck operation area below a rail-mounted gantry crane to obtain space position and attitude information of a container truck and a container carried by the container truck; dynamic calculation is carried out according to transverse, longitudinal and directional deviations between the current position of the vehicle and the target box grabbing and releasing position of the lifting appliance, alignment adjustment guide information is generated and fed back to a driver or an automatic driving system in real time through field display equipment; container posture changes are continuously tracked in the lifting appliance descending process, deviation compensation judgment is carried out by fusing historical information under the shielding condition, and container grabbing and releasing operation condition prompts are provided for a control end. According to the invention, rapid and accurate vehicle parking positioning and box grabbing and releasing auxiliary control can be realized, repeated adjustment is reduced, the loading and unloading efficiency is improved, the collision risk is reduced, and the method is suitable for intelligent and automatic port loading and unloading operation application.

The invention discloses an assembly type building prefabricated part hoisting device and a using method thereof. The hoisting device comprises a crane and a sling, and the crane is a travelling crane, a gantry crane or a crawler crane; the lifting appliance is arranged at the execution tail end of the crane, the crane comprises a lifting rod and an expansion type lifting assembly, the lifting rod is a vertical straight rod, a lifting ring connected with a hook at the execution tail end is arranged at the top of the lifting rod, a connecting seat is arranged at the bottom end of the lifting rod, and a sliding sleeve is movably arranged in the middle of the lifting rod; a gear device meshed with the vertical rack and driving the sliding sleeve to move is arranged at the upper end of the suspender; the expansion type hoisting assembly comprises an extension arm, a connecting arm and a hoisting module. Through the arrangement of the adjustable extension arms and the modular hoisting assemblies, the device can be precisely matched with square prefabricated parts of different sizes and shapes, and the universality of the device and the adaptability to different parts are greatly improved.

The embodiment of the invention provides a station assembling trolley. The station assembling trolley comprises a wheel rail walking device, a frame and a longitudinal beam mounting device. The wheel rail walking device is arranged at the bottom of the frame and can walk along a track on a platform bottom plate; the longitudinal beam mounting device is arranged on the frame and is used for fixing a longitudinal beam and moving the longitudinal beam to a target position for splicing; the longitudinal beam mounting device comprises a moving platform arranged at the top of a frame and capable of moving transversely relative to the frame; the lifting frame is arranged above the moving platform, and a space capable of containing the longitudinal beam is reserved between the lifting frame and the moving platform; and at least two connecting parts are arranged at the end part of the outer side of the hoisting frame and are used for temporarily connecting longitudinal beams. According to the station assembling trolley provided by the embodiment of the invention, the longitudinal beams of the station can be assembled under the application scene that a gantry crane cannot be applied, and the working efficiency is relatively high.

The invention provides a blanking system and a gantry crane, and relates to the technical field of engineering machinery. The blanking system is characterized in that a first conveying piece is arranged corresponding to a discharge port of the gantry crane; the second conveying assembly is movably arranged below the first conveying piece so as to convey materials output from the first conveying piece. The lifting parts are connected with the second conveying assembly, the lifting parts are used for corresponding to at least one of the multiple blanking points, and the lifting parts are used for ascending or descending when the blanking points are switched; and the second conveying assembly is configured to decelerate to stop when the blanking point is switched and the second conveying assembly moves from the current blanking point to the target blanking point to the deceleration area of the target blanking point, so that the lifting piece is correspondingly located above the target blanking point. According to the embodiment of the invention, through the second conveying assembly which is movably arranged, a large height difference is not needed, and material conveying to a plurality of material falling points is achieved.

The invention discloses an electric energy feedback collection and load peak suppression system for a wharf crane, and relates to the technical field of wharf power supply and distribution and energy management. Wherein the wharf crane comprises a quayside container crane (quay crane), a rail or rubber-tyred container portal crane (gantry crane) and the like, which are called cranes for short hereinafter. According to the system, instantaneous power, average power, peak duration and power increasing rate of a wharf power station, feedback power and feedback electric energy of a crane, capacity and charging and discharging parameters of an energy storage device, and electric energy quality indexes of a power grid are collected in real time; respectively calculating a peak impact index, a feedback absorption coefficient, a peak valley switching coefficient and a harmonic suppression coefficient, and comparing and analyzing with a preset threshold to generate a corresponding strategy; and integrating the results of the modules, carrying out unified scheduling on the energy storage device, and realizing power fluctuation compensation and stable output through a smooth scheduling strategy, thereby constructing an operation mechanism. According to the method, the instantaneous peak power of the wharf power station can be effectively inhibited, the feedback energy consumption capability is improved, the peak-valley scheduling economy is optimized, the electric energy quality is improved, and the safety, stability and energy efficiency of system operation are improved.

The utility model relates to the field of hoisting equipment, in particular to a portal crane rail cleaning device. Hairbrush cleaning in the prior art is changed into scraping plate cleaning, foreign matter on the top of the portal crane rail is scraped through the upper scraping plate, foreign matter on the two sides of the portal crane rail is scraped through the two side scraping plates, the upper scraping plate and the side scraping plates are elastically connected with the walking trolley, the bottom of the upper scraping plate abuts against the top of the portal crane rail, and the top of the portal crane rail is cleaned through the scraping plates. And if stones or foreign matters with high hardness appear on the ground on the two sides of the portal crane track, the side scraping plates can automatically avoid the stones or the foreign matters, so that damage is avoided.

The embodiment of the invention provides a manufacturing and assembling method of a large portal crane propeller strut, and relates to the field of steel structure manufacturing. The invention aims to solve the problem that the quality and the precision of the large gantry crane propeller strut need to be improved urgently. A head box body, a middle box body, a front box body, a rear box body, a front connecting box body and a rear connecting box body which are independently manufactured are assembled and fixed together; the balance pulley support and the anti-overturning support which are independently manufactured are assembled and fixed to the propeller strut body, and the large portal crane propeller strut is obtained; two middle box bodies are fixed to one side of the head box body side by side, each middle box body is fixedly provided with a front box body and a rear box body, the two front box bodies are connected through a front connecting box body, and the two rear box bodies are connected through a rear connecting box body. By adopting the modular manufacturing mode, the production process of the propeller strut structure can be simplified, the production efficiency can be improved, each module can be independently manufactured and tested and finally assembled, the manufacturing difficulty can be reduced, and meanwhile, the quality and precision control can be improved.