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57 results about "Crane Equipment" patented technology

Anti-skid device for movable formwork

The utility model relates to the technical field of constructional engineering, in particular to an anti-skid device for a movable formwork, which comprises a main beam, a front support leg, a rear support leg, a rear longitudinal moving auxiliary support leg, an outrigger suspension arm, a track, a rear suspension, an outer formwork, a bottom formwork, a suspension rod, a side formwork, an inner formwork, a reinforcement cage lifting appliance, a reinforcement cage tire car, a hydraulic and electric appliance, a halfpace and a handrail. According to the utility model, the upward moving beam yard is adopted to automatically finish the hole passing displacement of the supporting legs without other auxiliary crane equipment on the ground, the mechanical degree is high, the operation is simple, the safety and reliability are realized, and the rain-proof and sun-proof ceilings are arranged at the tops of the outriggers on the two sides of the main beam, so that all-day work of the moving beam yard can be ensured; when a concrete box girder is poured, steel bars of a next hole of box girder can be bound at the tail of the concrete box girder, the construction efficiency is greatly improved, the construction period is shortened, when a continuous beam or a continuous steel structure and other inter-bridge transition are carried out, only the side formwork and the bottom formwork need to be unfolded, passing can be conveniently carried out, the whole machine dismantling workload is reduced, and the transition operation efficiency is improved.
Owner:ZHENGZHOU HUAZHONG CONSTR MACHINERY CO LTD

An automated container yard and automated container terminal

This invention discloses an automated container yard and automated container terminal, allowing both automated horizontal transport equipment within the port and manual horizontal transport equipment outside the port to operate in the yard. The automated horizontal transport equipment within the port can operate with two containers at a time, while the manual horizontal transport equipment outside the port can travel in one direction. Through an underground structure, the automated horizontal transport equipment within the port is physically separated from the manual horizontal transport equipment within the port and can return to the landside without turning around. The two do not affect each other's operations, solving the technical problems of long travel distances and high energy consumption of yard cranes in vertical layouts. Moreover, the automated horizontal transport equipment within the port and the manual horizontal transport equipment outside the port will not cause congestion. Regardless of whether the yard structure is vertical or horizontal, it can improve the operational efficiency for handling large-volume operations.
Owner:QINGDAO PORT INT CO LTD

Embedded screen hook structure special for wharf tire crane equipment

The utility model discloses a special embedded screen hook structure for wharf tire crane equipment, which relates to the technical field of informatization transformation of wharf mechanical equipment and comprises a hook fixing part and a bearing back plate, a threaded sleeve ring is additionally arranged at the middle end in the hook fixing part, and hook bodies are additionally arranged on two sides of the outside of the hook fixing part. A limiting sliding groove is formed in the middle end of the interior of the hook fixing piece, meanwhile, a limiting sliding block is connected into the limiting sliding groove, a bearing back plate is arranged outside the limiting sliding block, a mounting abutting block is additionally arranged at the middle end of the exterior of the bearing back plate, threaded mounting grooves are formed in the two sides of the interior of the mounting abutting block, and meanwhile mounting bolts are connected into the threaded mounting grooves; mounting plates are distributed above the hook fixing pieces, and connecting threaded grooves are formed in the mounting plates. According to the embedded screen hook structure special for the wharf tire crane equipment, a screen can be rapidly disassembled and assembled, and the information interaction efficiency is enhanced while the space utilization rate is increased.
Owner:TAICANG PORT ZHENGHE XINGGANG CONTAINER TERMINAL CO LTD

Offshore drilling platform hoisting tank

The utility model relates to the technical field of offshore drilling, and discloses an offshore drilling platform hoisting tank which comprises a first support, and a ton tank body is placed in the first support. According to the offshore drilling platform hoisting tank, a user fixes the position of a first pressing plate, after the first pressing plate is fixed, a first safety induction lamp can send out a signal to remind the user that the first pressing plate is fixed, and at the moment, the user is connected with air hoisting equipment through a first hoisting ring and moves; the tonnage tank body is limited in the first support through the first pressing plate, so that the tonnage tank body does not shake or shift in the hoisting process, the safety risk caused by material shaking is greatly reduced, and the limitation of the first pressing plate on the tonnage tank body can be quickly removed by removing the connection between the first extension block and the first clamping block; the material can effectively improve the efficiency of offshore operation, and can be used for storing drilling fluid, fuel and other important materials.
Owner:DONGYING HANHE IND & TRADE CO LTD

A double-bridge type crane equipment anti-disturbance trajectory tracking and anti-swing control method

The application discloses a kind of double-bridge type hoisting equipment anti-interference trajectory tracking and anti-swing control method, construct the dynamics model of variable rope length double-bridge type hoisting equipment under the condition of unknown external disturbance, the dynamics model is expressed as the dynamics model of cascade system form by separating the dynamics model of energy drive state and cannot drive state, the actual coordinates of load centroid are subtracted from the desired trajectory vector of load centroid to obtain trajectory error vector, the load position error integral is obtained by trajectory error vector, then LSNF function is constructed, position control parameter matrix and speed control parameter matrix are defined, then pseudo-controller is constructed, speed error vector is constructed, finally actual controller is constructed according to speed control parameter matrix, speed error vector, trajectory error vector, pseudo-controller and the dynamics model of cascade system form.Using the technical scheme, the load positioning is more accurate, and the anti-interference ability of cable is stronger.
Owner:SHANDONG JIANZHU UNIV

Height-adjustable crane supporting leg locking device

The utility model discloses a height-adjustable crane supporting leg locking device which comprises two supporting frames, first adjusting assemblies are arranged in the two supporting frames, second adjusting assemblies are arranged at the upper ends of the supporting frames, a sliding rail is arranged between the first adjusting assemblies, hoisting equipment is connected to the sliding rail in a sliding mode, and the hoisting equipment is connected to the second adjusting assemblies in a sliding mode. Two moving wheels are arranged at the bottom end of the supporting frame, by arranging a second adjusting assembly, the flexible adjustment of the height of the crane supporting leg and the single-side multi-point supporting capacity are achieved, the adaptability and operation safety of the equipment are remarkably improved, a first motor drives a threaded rod to rotate, an adjusting block in threaded connection moves up and down along an adjusting frame, and the supporting leg can be adjusted conveniently. Therefore, the height of the supporting legs is changed, it is ensured that the crane can still be kept in a horizontal state on the uneven ground or under different terrain conditions, the precision and efficiency of lifting operation are optimized, in addition, each supporting leg can be conveniently and independently adjusted and locked, and the crane can be supported at multiple positions on the single side.
Owner:CHANGCHUN SHUANGLONG SPECIAL PURPOSE VEHICLE MFR

A double-bridge type crane equipment anti-disturbance trajectory tracking and anti-swing control method

ActiveCN122101991BDynamic modelsBridge type
This invention discloses a disturbance-resistant trajectory tracking and anti-sway control method for a dual-axle crane. It constructs a dynamic model of the variable-rope-length dual-axle crane under unknown external disturbances. By separating the drivable and non-drivable states, the dynamic model is represented as a cascaded system. The trajectory error vector is obtained by subtracting the actual coordinates of the load's center of mass from its desired trajectory vector. The load position error is then integralized from the trajectory error vector, and an LSNF function is constructed. Position control parameter matrices and velocity control parameter matrices are defined, leading to a pseudo-controller and a velocity error vector. Finally, the actual controller is constructed based on the velocity control parameter matrix, velocity error vector, trajectory error vector, pseudo-controller, and the cascaded system dynamic model. Using this technical solution, load positioning is more accurate, and the cable's anti-interference capability is stronger.
Owner:SHANDONG JIANZHU UNIV

Dust extraction assembly, clean crane and use

This invention relates to the field of crane equipment technology, specifically a dust collection assembly, comprising: drive casters, a transmission mechanism, a dust collection mechanism, and a collection box. The drive casters drive the dust collection mechanism through the transmission mechanism, and the upper end of the dust collection mechanism is connected to the collection box. The dust collection mechanism includes a suction pipe, a plastic sheet, and a fan blade. The suction pipe consists of a straight pipe and an arc-shaped adapter. The arc-shaped adapter at the upper end of the suction pipe is located in and connected to the collection box. A plastic sheet is provided at the upper end of the suction pipe to cover the upper end of the suction pipe, and the upper end of the plastic sheet is hinged to the upper end of the suction pipe. The fan blade is rotatably connected to the straight pipe of the suction pipe through a centrally fixed rotating shaft. The output end of the transmission mechanism is connected to the rotating shaft in the middle of the fan blade to drive the fan blade to rotate. This dust collection assembly can be installed in existing cranes and can automatically clean dust from grooved tracks without the need for additional electric drive components.
Owner:KEDEJIN INTELLIGENT EQUIP (WUXI) CO LTD +1

Crane equipment buffering and lifting device

The utility model relates to the technical field of cranes, in particular to a crane equipment buffering lifting device which comprises an electric hoist body and a buffering mechanism, the buffering mechanism comprises a square frame, and a rolling machine shell on the electric hoist body is provided with a rotating structure enabling the square frame to rotate. A rectangular hole is formed in the outer side of the square frame, and a sliding rod is arranged in the rectangular hole in a sliding mode; a transverse plate is fixed to one end of the sliding rod and located in the square frame. Two buffering structures used for buffering are arranged on the outer side of the transverse plate, and the two buffering structures are arranged on the two sides of the sliding rod correspondingly. The buffering mechanism is arranged at one end of the steel rope of the electric hoist, the buffering mechanism can buffer the fixed end in the process that the steel rope rapidly lowers an object and at the moment that the object stops lowering, buffering force is transmitted to the object through guiding of the steel rope, and therefore the steel rope and the object are buffered.
Owner:青岛赛十星起重设备有限公司

Safety detection method, system and equipment for hoisting mechanical equipment and storage medium

The invention provides a safety detection method, system and device for hoisting mechanical equipment and a storage medium, and the method comprises the steps: obtaining an operation image and multi-modal features of the hoisting mechanical equipment in real time through a sensing device, and carrying out the fuzzy compensation of the operation image, and obtaining a processed image; suspicious images possibly having security problems in the images are screened and processed at the edge computing node by using a lightweight convolution model, and the lightweight convolution model uses gated cross attention to adjust the area weight; extracting image features in the suspicious image by using a deep convolution model at a cloud end, forming a time feature vector by using the image features and the multi-modal features, labeling the time feature vector in a causal relationship graph which is used for defect reasoning and is simulated and adjusted based on an extreme working condition, and predicting a fault by using a time sequence graph convolution network; in the prediction process, an online learning method is adopted to adjust a predicted confidence coefficient threshold value, and a genetic algorithm is adopted to adjust the position of a camera in the sensing equipment.
Owner:SHANGHAI SPECIAL EQUIPMENT SUPERVISION & INSPECTION TECHNOLOGY RESEARCH INSTITUTE CO LTD

Crane with wire rope on-line detection function

PendingCN122324691AWire ropeCrane Equipment
This invention relates to the field of crane equipment, specifically disclosing a crane with online wire rope detection function, comprising: a gantry, an electric hoist, a reel, a hook, and a wire rope. A guide plate and a drive unit are installed on the outside of the electric hoist. The guide plate and drive unit enable the wire rope to be wound onto the reel and exit according to the corresponding position of the guide plate. An online detector is installed at the exit end of the wire rope through a structure such as a swing arm, sleeve, and slide bar, and is installed close to the lower part of the guide plate. This allows the online detector to detect the working condition of the wire rope in real time, quickly diagnose defects in the rope, and promptly take corrective measures to ensure safe production.
Owner:GUANGXI SPECIAL EQUIP SUPERVISION & INSPECTION INST P R CHINA

Radiator support of crawler crane equipment

The utility model discloses a crawler crane equipment radiator support which comprises a first baffle, a first supporting plate, a second supporting plate and a radiator, the first supporting plate is arranged at the bottom of one side of the first baffle, the second supporting plate is arranged in the middle of one side of the first baffle, and the first supporting plate and the second supporting plate are arranged in parallel. The ends, away from the first baffle, between the first supporting plate and the second supporting plate are fixedly connected through an angle steel plate, first fixing frames are symmetrically arranged on the two sides of the second supporting plate and fixedly connected with the first baffle, first sliding rails are symmetrically arranged on the upper portion of the first supporting plate, and sliding blocks are slidably installed on the upper portions of the first sliding rails. The sliding block and the first sliding rail are installed through a bolt after being slidably positioned, circulating replacement of refrigerating fluid in the radiator is achieved, heat transfer of the radiator is accelerated, and heat dissipation and cooling of oil pressure equipment are kept. The first ventilation plate can effectively ventilate and dissipate heat, can be opened at any time through hinged installation, facilitates installation of the radiator, and achieves a labor-saving and time-saving installation mode through sliding installation with the first sliding rail.
Owner:XUZHOU XUHUAI HEAVY IND TECH CO LTD

Fault diagnosis methods for crane maintenance and management

PendingCN122312114AFeature miningData Matrix
This invention discloses a fault diagnosis method for crane maintenance management, relating to the field of crane equipment operation and maintenance technology. It includes collecting a multi-source sensor data sequence consisting of vibration spectrum of the hoisting mechanism, wire rope tension fluctuations, and temperature changes at hinge points within the crane's operating cycle. The multi-source sensor data sequence is time-synchronized and outlier-removed to generate a standardized synchronization data matrix. The synchronization data matrix is ​​then fed into a hierarchical fault feature extraction process, outputting degradation feature vectors for key components and anomaly pattern identifiers. The remaining effective working range length of the components is calculated using the degradation feature vectors, and the fault initiation time point is located using the anomaly pattern identifier. These two types of information are merged and encoded to generate a maintenance trigger signal, which is then pushed to the crane control terminal display interface. This method achieves standardized organization and hierarchical feature mining of multi-source operating data, quantifies the service status of components, and identifies the fault initiation time, providing a standardized status basis for crane maintenance management.
Owner:FUJIAN TONGQI MACHINERY EQUIPMENT CO LTD

Internal hexagonal bolt tightening tool for narrow and small space of engine

The utility model relates to a hexagon socket screw tightening tool for a narrow space of an engine, which belongs to the field of engines and comprises an adapter, an eccentric sleeve, a connecting rod and a ratchet wrench. One end of the adapter is a hexagon head for connecting an inner hexagon bolt, and the other end of the adapter is a dodecagonal head; one end of the eccentric sleeve is provided with a first dodecagonal sleeve face used for being connected with a dodecagonal head, and the other end of the eccentric sleeve is detachably connected with the end of the connecting rod. The end of the ratchet wrench is provided with a second dodecagonal sleeve face used for being connected with the dodecagonal head. The adapter can be sequentially connected with the eccentric sleeve and the connecting rod or connected with a ratchet wrench so as to meet the operation requirements of different spaces. According to the utility model, the after-sales maintenance tightening and dismounting process of the hexagon socket screw of the high-pressure fuel pump can be completed without the need of being hoisted by large travelling crane equipment, the mounting torque can be ensured, and the operation is convenient. And after-sales service personnel can conveniently maintain the engine on the after-sales market on site, and the after-sales service cost is reduced.
Owner:SHANGHAI NEW POWER AUTOMOTIVE TECH CO LTD

End point detection and protection integrated device for luffing mechanism of portal crane

The invention relates to a portal crane luffing mechanism end point detection and protection integrated device, and relates to the technical field of portal crane equipment, the portal crane luffing mechanism end point detection and protection integrated device comprises an induction piece arranged on a cantilever crane, and a first limit switch and a second limit switch which are arranged on a rotating seat, the first limit switch is arranged at the tail end of an amplification process, and the second limit switch is arranged at the tail end of an amplification process; the second limit switch is arranged at the tail end of the amplitude reduction process; a third limiting switch located behind the first limiting switch and a fourth limiting switch located behind the second limiting switch are arranged on the rotating base, and the first limiting switch and the third limiting switch can control on-off of the amplitude variation driving source piece in the amplitude increasing process. The second limit switch and the fourth limit switch can control the on-off of the amplitude variation driving source part in the amplitude reduction process respectively, and the induction part can trigger the first limit switch, the second limit switch, the third limit switch and the fourth limit switch. The method has the effect of improving the terminal point detection limiting reliability of the luffing mechanism.
Owner:NANJING PORT MASCH & HEAVY IND MFG CO LTD +1

Crown block sliding contact line rail sweeper

The utility model relates to a crown block sliding contact line rail sweeper, and belongs to the technical field of crown block equipment maintenance in the metallurgical industry. According to the technical scheme, the device comprises a slide wire relay (1), a relay sliding block (3), a sliding contact line (4), a steel wire clamping plate (5), a rail sweeping steel wire (6) and a mounting support (7), the slide wire relay (1) is slidably connected to the sliding contact line (4) through the relay sliding block (3), the mounting support (7) is fixed to the relay sliding block (3), the rail sweeping steel wire (6) is fixed to the mounting support (7) through the steel wire clamping plate (5), and the rail sweeping steel wire (6) is matched with the sliding contact line (4); the two rail sweeping steel wires (6) are pressed on the edge of the end face of the sliding contact line (4) through self elastic force. The device has the advantages that the device is installed on a slide block of a slide wire relay of the crown block, in the normal walking process of the crown block, the slide wire is polished and cleaned on line, flashes on two wings of the end face are removed, and power failures caused by short circuit of the flashes, grounding and other factors are avoided.
Owner:TANGSHAN QUANFENG SHEET CO LTD

Double-track single main beam of electric hoist type crane

The utility model discloses a double-track single main beam of an electric hoist type crane, which relates to the technical field of crane equipment and comprises a single main beam body, a frame plate is fixedly connected to the side edge of the single main beam body, a damping mechanism is arranged outside the frame plate, and the damping mechanism comprises a driving motor arranged outside the frame plate. A first gear is arranged at the output end of the driving motor, a second gear is in meshed connection with the side edge of the first gear, a transmission rod is fixedly connected with the side, close to the first gear, of the second gear, a first bevel gear is fixedly connected with the side, away from the second gear, of the transmission rod, and a third gear is in transmission connection with the side, away from the transmission rod, of the first bevel gear; the side edge of the third gear is in meshed connection with a rack rod, so that vibration energy can be effectively absorbed and dispersed, the influence of vibration on a main beam structure is remarkably reduced, fatigue deformation of a main beam is prevented, and particularly the situation that a lower flange deforms due to overlarge suspension wheel pressure is prevented, so that the safety and the stability of the crane are greatly improved.
Owner:SHANGHAI TUOQI LIFTING EQUIPMENT CO LTD

Static detection device for a truss hoisting apparatus

ActiveCN224456668UCouplingFeed pump
This utility model relates to the field of truss crane maintenance technology, specifically to a static inspection device for truss crane equipment. It includes an ultrasonic flaw detector and a probe assembly. In this utility model, after aligning the nozzle with the weld area, pressing the trigger along the extension rod axis moves the second rack towards the limit switch, simultaneously driving the movable frame to move the nozzle and cleaning assembly towards the distal end of the probe body's detection end. When the second rack contacts and triggers the limit switch, the feed pump delivers coupling agent to the nozzle, precisely spraying the coupling agent onto the weld. Simultaneously, a servo motor drives the rotating plate and sponge cloth to rotate, wiping the probe's detection end surface, effectively removing residual coupling agent from the probe's detection end surface during the inspection process. This achieves synchronized coupling agent spraying and probe cleaning, reducing the safety risks and implementation difficulties associated with alternating multi-process operations in high-altitude environments.
Owner:DESHIZHENG (SUZHOU) INTELLIGENT TECH CO LTD

Intelligent cleaning system and method for optical sensing unit of crane equipment

The invention discloses an intelligent cleaning system and method for an optical sensing unit of crane equipment, and belongs to the technical field of engineering machinery. The system comprises a central intelligent control unit, a dirt detection unit, an intelligent cleaning execution unit and a motion and control unit. The dirt detection unit is used for acquiring detection information of the condition of dirt on the surface of the protection window of the optical sensing unit and sending a signal to the central intelligent control unit; the central intelligent control unit controls the movement and control unit and the intelligent cleaning execution unit to act according to the received detection information; and the intelligent cleaning execution unit is used for cleaning a protection window of the optical sensing unit. According to the system, full-automatic and precise cleaning of the optical sensing unit of crane equipment can be realized, manual intervention is not needed, the influence of a severe environment on the optical sensing unit is overcome, the monitoring, obstacle avoidance and positioning precision of the crane is guaranteed, and the operation safety and the operation efficiency of the crane are improved.
Owner:HAINAN PORT & SHIPPING INT PORT CO LTD

Crane counterweight mechanism

The utility model discloses a counterweight mechanism of a crane. The counterweight mechanism comprises a stand column, a movable arm, a linear power device and a counterweight block, the movable arm consists of a first movable arm and a second movable arm and is connected with the stand column and the balancing weight through a hinge shaft; the linear power device drives the movable arm to unfold and fold, the gravity center position of the balancing weight is adjusted, the balancing weight torque is increased, and the stability of the crane is improved. The movable arms are symmetrically arranged on the two sides of the stand column, occupied space is reduced, and operation in narrow space is facilitated. The balancing weights are connected through the hinge shafts, gravity center stability is guaranteed, and tension change is reduced. The utility model has the advantages of flexible operation, small occupied space and low cost, and is suitable for various crane equipment.
Owner:HUBEI DOOD CRANE

Offshore hanging pile swing restraining device with automatic adjusting function and swing restraining method

PendingCN121976533AApplicable to technical issues related to slow construction progresssmall swing inertia forceLoad-engaging elementsBulkheads/pilesMarine engineeringStructural engineering
The invention belongs to the technical field of floating crane equipment in the maritime work industry, and particularly relates to an offshore pile lifting swing restraining device with an automatic adjusting function and a swing restraining method, and the device comprises a pile extractor connecting flange plate which is installed on a pile extractor and is a circular plate; the four steel cable lifting and lowering units are arranged on the lower portion of the pile extractor connecting flange plate at equal intervals in the circumferential direction with the center of the pile extractor connecting flange plate as the circle center, the length of the steel cable lifting and lowering units can be adjusted, and the four steel cable lifting and lowering units jointly hoist the swing restraining ball; the oil supply unit is located in the center of the lower portion of the pile extractor connecting flange plate and used for injecting oil into the swing restraining ball. The motion recognition detection unit comprises an original point detection unit and a motion recognition monitoring point P, the original point detection unit is located in the center of the lower portion of the pile puller connecting flange plate, and the motion recognition monitoring point P is located at the top of the swing suppression ball. The method is suitable for solving the technical problem that in the offshore pile hoisting operation process affected by wind power, the construction progress is slow due to swinging during pile hoisting positioning and butt joint of a pile feeder and a foundation pile.
Owner:JIANGSU UNIV OF SCI & TECH

A horizontal wheel detection device for a bridge trolley

This utility model relates to the technical field of horizontal wheel detection devices for yard crane trolleys, solving the problem that it can only be applied to horizontal wheels of a single size specification. For horizontal wheels of larger yard crane equipment, it cannot adapt to the wheel diameter, resulting in a decrease in monitoring accuracy. Specifically, a horizontal wheel detection device for yard crane trolleys includes a horizontal wheel, a rotating rod fixedly connected to the side of the horizontal wheel, a bearing sleeved at one end of the rotating rod, a bracket fixedly connected to the side of the bearing, a mounting hole with a mounting bolt inside the mounting hole at the top of the bracket, a monitoring component fixedly connected to the bottom of the bracket, and a control plate fixedly connected to the side of the bracket. The monitoring component includes two extension rods symmetrically fixed to the bottom of the bracket, a sleeve slidably connected to the surface of the extension rods, a plurality of limiting holes equally spaced from top to bottom on the side of the sleeve, and a sleeve hole with a spring sleeved inside the sleeve hole at the bottom of the extension rod.
Owner:ANHUI PORT GROUP HEFEI CO LTD

Adjustable base for a crane

The utility model discloses an adjustable base for crane belongs to crane equipment technical field, it includes: base, the one side of base is provided with controller, and the bottom fixed mounting of base has four groups of support column, and the inside rotatory mounting of base has the shaft and worm, the outside fixed mounting of shaft has worm wheel, and the top fixed mounting of shaft has workstation, and the bottom fixed mounting of workstation has rotating ring, and the top fixed mounting of base has rotating seat, and the bottom fixed mounting of base has support board, and the one side fixed mounting of support board has hydraulic cylinder, and the bottom sliding installation of base has two groups of inclined piece no.
Owner:JIANGSU HUACHENG INDAL

crane equipment

To provide a crane device that can prevent erroneous lifting due to malfunctions. [Solution] The crane device 1 includes a hook 3 that is rotatably supported horizontally on a hook block 2 that moves up and down, and a suspension rope such as a wire rope 10 formed by twisting together a plurality of strands 11 to connect the load 100 to the hook 3. The crane device 1 also includes a rotation sensor 22 that detects the rotation state of the hook 3, and a determination circuit that determines an abnormality in the wire rope 10 suspending the load 100 from the rotation state of the hook 3 detected by the rotation sensor 22 when raising the load 100 from the ground.
Owner:HONDA MOTOR CO LTD

Method for preventing runaway speed of a crane, programmable controller and system

The application provides a crane operation speed out-of-control prevention method, a programmable controller and a system, and relates to the technical field of cranes. The method is applied to a crane device. The crane device is provided with a PLC and a speed regulating device. The PLC is electrically connected with a brake control loop. The crane operation speed out-of-control prevention method comprises the following steps: when the speed regulating device receives a stop instruction signal, the speed regulating device sends a first brake closing signal to control the brake of the crane device to close; and after the stop instruction signal is output for a first preset time length, the PLC sends a second brake closing signal to control the brake of the crane device to close again. The whole brake action is double-controlled by the speed regulating device and the PLC, that is, the speed regulating device first performs the brake action, and then the brake is controlled by the PLC, so that the probability of the occurrence of a hook slipping or vehicle slipping event caused by the out-of-control of the operation speed of the lifting and translation mechanism of the crane is reduced.
Owner:CHINA FIRST HEAVY IND