47results about How to "Large lifting weight" patented technology

The invention discloses an extra-high voltage common circuit iron tower assembling method, which belongs to the technical field of electric transmission and transformation electric power circuit construction processes. The method comprises the following steps of: 1, performing construction preparation, namely cleaning a construction field, arranging the construction field, preparing a construction ground foundation, and transporting tower materials required by iron tower assembly; 2, assembling a pole, erecting the pole and assembling tower leg lower sections; 3, assembling and erecting towerlegs, lifting the pole, and hoisting iron tower crank arms; and 4, lifting the pole, hoisting a tower head, mounting a ground wire bracket, hoisting iron tower cross arms one by one in a segmentationmode, mounting iron tower accessories and disassembling the pole. The method has the advantages of reducing the working amount of aloft operation, along with a short construction period, a small number of hoisting times and high safety; by the method, safety risks are reduced, required aloft operation personnel is greatly reduced, and labor cost is reduced; and the method has extremely good economic and social benefits.

The invention relates to an electric automatic levelling brace for realizing multipoint electric automatic levelling, and aims to provide an electric automatic levelling brace with large lifting weight, rapid and reliable touchdown, good repeatability of levelling precision, high precision, safety, convenience, convenient maintenance and simple electric connection. The electric automatic levelling brace comprises a levelling bearing disc connected with a levelling brace cylinder body and a direct current servo motor with an electric control unit. The top of the levelling brace cylinder body is provided with a transmission chain which is connected with an output shaft of a speed reducer and a leading screw pair for rotary motion; the leading screw pair drives a levelling telescopic cylinder body manufactured with a screw and the levelling bearing disc fixedly connected with the leading screw pair together to do linear lifting motion; a microswitch for feeding back the lifting position to an external control system is arranged on the cylinder wall of the levelling brace cylinder body; a small displacement triggering shaft records the moving position, triggers the microswitch at a triggering point and transfers an electrical signal of the lifting position of the levelling brace to the outside; and the small displacement triggering shaft is connected external control equipment through the microswitch and forms a closed loop levelling system with the servo motor connected with the speed reducer .

The invention discloses an extra-high voltage large-span iron tower assembling method, which belongs to the technical field of electric transmission and transformation electric power circuit construction processes. The method comprises the following steps of: 1, arranging a construction site, namely arranging a ground anchor, performing pole foundation construction, and arranging main material single pieces and tower sheets of an assembled iron tower body on the ground; 2, assembling a pole, mounting a hoisting system, and hoisting iron tower legs, wherein the assembled pole is a spinning self-elevating ground pole which is provided with horizontal double arms and a hydraulic downward jacking stock; 3, lifting the pole, hoisting the iron tower body section by section, and finally hoistingiron tower cross arms one by one in a segmentation mode; and 4, mounting iron tower accessories, disassembling the pole, and finally overhauling and self-checking to finish the construction. The method has the advantages of reducing the working amount of aloft operation, along with a short construction period, a small number of hoisting times and high safety; by the method, safety risks are reduced, required aloft operation personnel is greatly reduced, and labor cost is reduced; and the method has extremely good economic and social benefits.

The invention provides a tilted four-rotor aircraft cooperative lifting and transporting device. The tilted four-rotor aircraft cooperative lifting and transporting device comprises a warehouse, a landing gear, lifting hooks, buckles and a plurality of tilted four-rotor aircrafts used as a power source, wherein the lifting hooks are arranged at the bottoms of the tilted four-rotor aircrafts used as the power source, the buckles are installed on the warehouse, and the lifting hooks are connected with the buckles. As the tilted four-rotor aircraft cooperative lifting and transporting device provided by the invention adopts the tilted four-rotor aircrafts, the cooperative lifting and transporting device has two take-off modes, namely the vertical take-off of the lifting and transporting device is realized through cooperative lifting of the plurality of tilted four-rotor aircrafts, and the tilted four-rotor aircrafts drive the warehouse to realize high-speed glide and take-off. The cooperative lifting and transporting device provided by the invention adopts the tilted four-rotor aircrafts as the power source for lifting equipment so as to overcome the difficulty of high-altitude lifting, and by utilizing the plurality of aircrafts for cooperative lifting, the lifting weight can be increased, and the number of the aircrafts can be increased or decreased according to the change of the lifting weight, so that the cooperative lifting and transporting device has certain flexibility; in addition, the cooperative lifting and transporting device has the advantages of heavy lifting weight, high flight speed and the like.

The invention discloses a crane trolley, which relates to the technical field of crane machinery. The crane trolley comprises a trolley frame, wherein travelling wheels are arranged at the bottom of the trolley frame; an operating motor and an elevating motor are arranged on the trolley frame; the operating motor is connected with a speed reducer to drive the travelling wheels to move; a winding drum is arranged on the trolley frame in a position on one side of the elevating motor; the winding drum is connected with an elevating speed reducer; the elevating speed reducer and the elevating motor are connected with each other through a coupling and a transmission shaft; a fixed pulley block is arranged on the transmission shaft; the fixed pulley block is connected with a hoisting hook through a steel wire; and the elevating speed reducer is provided with a brake. The crane trolley has the advantages of large hoisting weight, small size, wide application range and safety and reliability in running.

The invention relates to a double-rocker-arm electric control rotation derrick which comprises a vertically-arranged main rod section, a mast, a derrick operation platform and at least one pair of rocker arms. The main rod section comprises a combination type lower base, a hydraulic lifting support, a main column and an electric rotation hinge base. The electric rotation hinge base is controlled by the derrick operation platform to conduct rotation and comprises a supporting frame, a hinge base body, a rotation bearing fluted disc, a motor, a reduction box and a rotation bearing base; angle transducers are arranged on the root portions of the pair of rocker arms and provided with anti-abrasion rope structures to be hinged to a connecting arm of the electric rotation hinge base; the derrick operation platform comprises a control cabinet, a monitoring display screen, a speed controller and a display limitation alarm device. The double-rocker-arm electric control rotation derrick is simple and reasonable in structural design, easy and convenient to assemble and apply and capable of achieving integrated operation such as electric control, detection, monitoring and alarming, the construction safety and the construction reliability are improved, the assemblage construction requirements of extra-high voltage line iron towers can be met, and the labor efficiency can be improved.

The invention discloses engineering vehicle lifting equipment. The engineering vehicle lifting equipment comprises an engineering vehicle, transmission shafts, a lifting device and lifting cylinders.The engineering vehicle comprises a compartment and a cab. The lifting cylinders comprises piston rods and four cylinder barrels, and the four cylinder barrels are separately arranged on two sides ofthe front end and the rear end of the compartment and are fixedly connected with the compartment. The piston rods are disposed in cushion blocks and are slidably connected to the cylinder barrels, andsupporting blocks are arranged at the upper ends of the two piston rods disposed on the rear side of the compartment. The transmission shafts include conveying shafts and a fixing shaft, and the supporting blocks and conveying motors which are disposed on the same side are connected through the conveying shafts. The lifting device comprises an adjusting motor, a rope box, a rope and a hook, and sliding holes are formed in the rope box. The sliding holes are matched with the fixing shaft, and the adjusting motor is disposed at the upper end of the rope box. One end of the rope is disposed in the rope box, and the other end of the rope is disposed outside the lower end of the rope box. The cab is internally provided with a control device which is electrically connected with the adjusting motor, the lifting cylinders and the conveying motors.

The invention discloses a hoisting trolley for a double beam bridge crane. The hoisting trolley comprises a trolley frame, traveling wheels are installed at the bottom of the trolley frame, a first hoisting component and a second hoisting component which are independent are arranged on the trolley frame, the first hoisting component comprises a first driving device, a transmission component, a first decelerating mechanism, a first winding drum, a first fixed pulley set and a first hoisting hook, and the second hoisting component comprises an operation driving device, a hoisting driving device, a second winding drum, a second decelerating mechanism, a second fixed pulley set and a second hoisting hook. Since two independent hoisting units are integrated into the trolley, the hoisting trolley for the double beam bridge crane has the advantages of compact and reasonable structure, high hoisting weight, small size, wide service range and safety and reliability in operation.

The invention relates to a workpiece charging and discharging auxiliary device for a large-scale special-shaped workpiece. The workpiece charging and discharging auxiliary device integrates three functions of lifting, moving and follow-up posture correcting, and consists of a hydraulic lifting platform (1), a horizontal moving platform (4) and a follow-up posture correcting platform (6). The horizontal moving platform (4) is supported on a hydraulic lifting platform (1) through a moving rail (2) and is driven by a transmission chain (15). The follow-up posture correcting platform (6) is placedon a unpowered follow roller way (5) on the horizontal moving platform (4); and the workpiece (7) is directly placed on the follow-up posture correcting platform (6), and the posture can be automatically corrected along with the change of the workpiece gravity center on the follow roller way (5), so that the impact force of the workpiece charging on the conveying line is reduced, the damage to operators caused through turnover or shaking of the workpiece is reduced, and the safety of the workpiece charging is improved.

The invention relates to a large-bearing-capacity sleeve unloading mechanism characterized in that: the mechanism is mainly composed of connected components of a sleeve collecting rack, a boom driving oil cylinder, a boom, a lifting hook, a sleeve detecting sensor, a lifting hook opening rate adjusting motor, an absolute value encoder, and a driving oil cylinder pedestal. A sleeve storing working face of the sleeve collecting rack is an inclined plane; holes used for installing the boom are provided on two sides of the sleeve collecting rank; the driving oil cylinder pedestal is fixed in the inner cavity of the sleeve collecting rack; the driving oil cylinder pedestal is hinged with the driving oil cylinder; a cylinder head of the boom driving oil cylinder is connected with a jib of the boom; the boom is connected to the sleeve collecting rack through a sliding bearing; the lifting hook is connected to the boom; the sleeve detecting sensor is connected to a roll loading trolley; the sleeve detecting sensor is used for detecting whether a sleeve is on the trolley; the absolute value encoder penetrates the jib through a shaft; two ends of the absolute value encoder form a clearance fit with the inner ring of the sliding bearing. With the mechanism provided by the invention, automation of sleeve unloading can be fully achieved.

The invention belongs to the technical field of lifting equipment and discloses a movable lifting device. The movable lifting device comprises a chassis (1) capable of walking freely and a tray (2) arranged above the chassis (1), a lifting mechanism (3) is arranged between the chassis (1) and the tray (2) and controls the tray (2) to ascend or descend, and the lifting mechanism (3) comprises a lifting frame, a lead screw (9) and a driving motor (10). The lifting frame comprises a first lower support (4) and a first upper support (5), one end of the first lower support (4) is rotationally connected with the chassis (1), the other end of the first lower support (4) is movably connected with a lead screw nut (8), one end of the first upper support (5) is rotationally connected with the firstlower support (4), the other end of the first upper support (5) is rotationally connected with the tray (2), and the lead screw (9) is connected with the lead screw nut (8). According to the movable lifting device, rapid movement of a vehicle can be realized, the lifting weight is large, and the reliability is high.

The invention discloses a four-post four-lifting-point chain type lifter for a car side wall. The four-post four-lifting-point chain type lifter comprises an auxiliary beam, a fixed rack, a drive device, a movable framework, a counterweight block and four guide posts, wherein the fixed rack is arranged on the auxiliary beam. The four-post four-lifting-point chain type lifter is characterized in that four corners of the movable framework are symmetrically provided with four movable framework guide wheels; upper and lower ends of the counterweight block are symmetrically provided with counterweight block guide wheels; the drive device comprises a motor speed reducer, a shaft coupler, a drive chain wheel transmission shaft, a duplex chain wheel I, a driven chain wheel transmission shaft, a duplex chain wheel II, two long transmission chains, two driven chain wheels, two short transmission chains and a plurality of bearing bases; the two long transmission chains and the two short transmission chains are open type chains; and the motor speed reducer is arranged on the auxiliary beam. The four-post four-lifting-point chain type lifter is simple in structure, uniform in stress, stable in operation, great in hoisting weight, high in guide precision, safe and reliable, and long in service life.

The invention relates to a counter weight-free crane and belongs to the field of building construction. The counter weight-free crane comprises a rack body, wherein a rotating bearing is arranged on the rack body; a moving platform is arranged on the rotating bearing; a telescopic lazy arm is arranged on the moving platform; a winch matched with the lazy arm is also arranged on the moving platform; a plurality of vertical supporting rods capable of leaning against floor slabs are also arranged on the rack body; and the vertical supporting rods are right behind the moving platform. Compared with the prior art, the crane can be jacked between upper and lower floor slabs through the supporting rods to balance the upsetting moment during hoisting. The length of the lazy arm can stretch freelyand can rotate up and down and left and right, so that the counter weight-free crane is large in hoisting range. The counter weight-free crane also has the advantages of being small in self weight, large in hoisting weight, flexible to move, convenient to position and the like, and solves many problems of existing counter weight cranes and simple cranes for buildings.