74results about How to "Meet the lifting requirements" patented technology

The invention relates to the field of anti-freezing and de-icing, in particular to an anti-freezing and de-icing mechanism for a lock gate or an arc gate. The anti-freezing and de-icing mechanism comprises an automatic lifting part, an anti-freezing and de-icing part, a cable limiting part and a visual monitoring and alarming part. A heavy hammer traction guide steel wire rope is adopted as a guidance for automatic lifting of the anti-freezing and de-icing device for the lock gate or the arc gate; a single floating barrel lifting system is adopted in such a manner that the debugging and mounting operations can be conveniently performed; two diving pumps and a main pipe are adopted in such a manner that the cable is enabled to meet the device lifting requirements by a three-way connection way and a cable limit suspension sliding way; the sections of the main pipe are connected in a such a flange division way that transportation is conveniently realized and bending deformation is prevented; the conventional crane is adopted in such a manner that the lifting operation is performed through a lifting hook arranged on a floating barrel; an outlet of a water spraying pipe forms an oblique upward angle of 45 DEG with the horizontal main pipe in such a manner that water flow form is more favorable for anti-freezing and de-icing; and the visual remote monitoring and alarming function is adopted in such a manner that an effective guarantee is provided for safe, stable and economic running of the lock gate or the arc gate.

The invention discloses a lifting belt-type suspender for horizontal hoisting and belongs to mechanical hoisting equipment. The lifting belt-type suspender solves the problem that the existing horizontal hoisting suspender has a limited adjustment or use range, low efficiency and poor universality. The lifting belt-type suspender comprises a hanging beam, lifting belts, front and rear rotating shaft assemblies and an overturn support. The two lifting belts are hung under left and right ends of the hanging beam. One end of each one of the two lifting belts is connected to the front rotating shaft assembly and the other end of each one of the two lifting belts is connected to the rear rotating shaft assembly. The front rotating shaft assemblies and the two rear rotating shaft assemblies are connected to the overturn support. The overturn support comprises four tripods. The lifting belt-type suspender has a simple structure, good versatility, high strength and good integrated mechanical properties. All the parts of the lifting belt-type suspender can be detachably connected so that manufacture and maintenance are simple and manufacturability is good. The lifting belt-type suspender can be used for horizontal hoisting of cabins having different quality, centroids and sizes and realize change of a static displacement state of the cabins under support action of the overturn support.

The invention relates to a crane remote wireless parallel-operation control system and a method, belonging to the control system and the method which are applicable for remote wireless parallel-operation running when at least two crane equipment hoist ultra-long workpieces. The invention mainly solves the technical difficult point that the existing crane parallel-operation system can not hoist the ultra-long workpieces. The technical proposal of the invention aiming at solving the technical difficult point is that the crane remote wireless parallel-operation control system comprises a PLC which comprises a digital quantity input / output module and an analog signal input / output module, a human-machine interface (HMI) and a crane control system of a transducer; wherein, the crane remote wireless parallel-operation control system also comprises a large vehicle laser range finder, a small vehicle laser range finder, a rising laser range finder, an absolute value encoder and a wireless photoelectric data transmission module (ISD); and the parts are connected with the PLC by field buses.

The invention provides a pour point depression and viscosity reduction agent. The pour point depression and viscosity reduction agent is characterized in that the pour point depression and viscosity reduction agent is a copolymer formed by a first monomer and a second monomer, wherein the first monomer is R1-CH=CH-COOR2, R1 is H, alkyls of C1-6 or COOH, R2 is alkyls of C12-24, and the second monomer is an olefinic bond-containing monomer with surface activity.

The invention discloses a steel rail roller conveyor. The main structure of the conveyor is that a motor is engaged with a gear fixed in the lower part of a transmission shaft inside a driving vertical roll cabinet through a retarder, a pair of gears fixed in the middle part of a stationary transmission shaft are engaged with each other and respectively engaged with two groups of intermediate gears, the intermediate gears are engaged with the gear in the middle part of a driving vertical roll to drive the rotation of the driving vertical roll, each intermediate gear is respectively engaged with a pivoted arm on the main shaft of the driving vertical roll and a pivot arm on the stationary transmission shaft, each main shaft of the driving vertical roll respectively forms a gear-link rod mechanism together with the stationary transmission shaft, and the four driving vertical roll cabinets are independent and have closed guide track structure. The inventive steel rail roller conveyor realizes the rotation of two pairs of driving vertical rolls for holding the rail web at the same rotation speed. The driving vertical rolls convey long steel rails to the 500-meter long steel rail storage platform along a roller line and then open to make room for hoisting the steel rails, so as to meet the technical requirements of driving the steel rails to travel along the roller line of the 500-meter long steel rail storage platform.

The invention discloses an unfolding-type mobile service publicizing vehicle. A side board on one side of a compartment is a movable door; a first support is symmetrically arranged at the front and back ends of the movable door respectively and connected with a second support in the compartment by a hydraulic cylinder; the middle parts of the front and back ends of a display screen frame are hinged with a positioning seat on a top board by a support arm respectively; a front linear guide rail and a back linear guide rail which are parallel to each other are fixed on the top board and provided with a slide block respectively; the slide blocks are fixed with the display screen frame; an electric motor is arranged between the two linear guide rails; the output shaft of the electric motor is coaxially connected with a lead screw; and nuts matched with the lead screw are fixed in the centers of the sides of the display screen frame. The using space of the mobile service publicizing vehicle can be effectively expanded so as to accommodate more exhibition stands, exhibits and visitors; and a light-emitting diode (LED) screen lifting mechanism in the unfolding-type mobile service publicizing vehicle takes up small space, meets the lifting requirement of the LED screen of the mobile service publicizing vehicle, and is characterized in that: the mechanism moves stably, is safe and reliable, and the like.

A construction method for integrally hoisting a large-size multi-edge-and-corner overhanging truss is disclosed. Integral assembling of a steel pipe truss is conducted on site, and integral hoisting is conducted after assembling is completed; the truss is connected with three welding positions in a butt-joint mode and then is welded firmly; two 500 t all-terrain cranes and a 350 t all-terrain crane are adopted to hoist the whole truss simultaneously, and step-by-step hoisting is conducted from south to north; the truss is totally provided with three main stress support joints which are all fixed by adopting butt welding, a third calibration point support is located at the top of the truss, a welded ball joint at the position of the third calibration point is a support point of a steel rainshed grid frame actually, a first calibration point support and a second calibration point support are located on both the left and right sides of the bottom of the truss correspondingly, and the first calibration point support and the second calibration point support are global stress supporting points of the truss. The construction method for integrally hoisting the large-size multi-edge-and-corner overhanging truss has the characteristics that the construction safety is high, the construction period is short, the engineering quality is easy to guarantee, the ground integral assembling efficiency is high, and the construction cost is reduced greatly.

The invention provides a full-face tunnel boring machine. The full-face tunnel boring machine comprises a tunnel boring machine main body, wherein a cutter disc is arranged at the head of the tunnel boring machine main body and is detachably connected with the tunnel boring machine main body, and the tunnel boring machine main body is formed through detachably connecting a plurality of main body modules. According to the full-face tunnel boring machine, the difficulty of transportation can be lowered; the full-face tunnel boring machine can be applied to laneways adopting vertical shaft structures.

The invention discloses an air cylinder linkage plug pin type automatic tray supply warehouse. The air cylinder linkage plug pin type automatic tray supply warehouse comprises a rack assembly, a chainwheel conveying assembly, a sensor assembly, a plug pin assembly, a protection frame assembly and a power assembly' the power assembly comprises an air cylinder assembly and an engine assembly whichare arranged in a cavity formed in the middle of the rack assembly. Through fit between multiple sensors and an air cylinder and ingenious fit of the chain wheel conveying assembly, full-automatic continuous stable extraction and conveying of trays can be achieved, and the warehouse is portable and efficient; the air cylinder with an electromagnetic valve is used for lifting the trays, the characteristic of the electromagnetic valve is used, during power failure, the pressure can be kept, one-air-cylinder multi-stroke moving is achieved, in the key fit position in the midway, the air cylinderis lifted for staying, a vertically moving execution mechanism is reduced, and the warehouse is simple and reliable; a crank connecting rod mechanism is used, pushing of the air cylinder s converted into rotation of a plug pin shaft, the plug pin can be driven to be rotated out, separation of the trays can be achieved, and through shrinkage, the plug pin is driven to be reset.

The invention discloses a high-wax thick oil pour point depressant and a preparation method thereof, and belongs to the field of polymer material preparation. The pour point depressant is formed by copolymerizing maleic anhydride and 2-acrylamido-2-methylpropanesulfonic acid according to a molar ratio of 1:0.01-1, and has a molecular weight of 3000-100000 g / mol. The pour point depressant has good temperature and salt resistance, the resisting temperature reaches 140 DEG C, and the resisting salinity reaches 200000 mg / L; and the pour point depressant also has a good pour point depression effect, and can reduce the freezing point of thick oil with the wax content of 30-40% by 6 DEG C or above. The pour point depressant can be widely applied to pour point depression of high-wax thick oil wells.

The invention discloses a mounting method of an external floating roof oil tank active protection system. The system comprises a micro fog sprayer and a sampling probe arranged in a first sealing ring and a second sealing ring of the external floating roof oil tank, wherein the micro fog sprayer and the sampling probe are connected with a field device arranged outside a fire dike of the oil tank through a pipe network. Through the pipe network structure design and mounting method of communicating the field device with the micro fog sprayer, and connecting the field device with the sampling probe, the system can be mounted under the condition that the oil tank has oil; the lifting requirements of the oil tank along with the liquid level can be satisfied; the load of the oil tank floating roof is not affected by the added materials; through the design of a hose, the static electricity generated when the liquid flows can be eliminated; and the lightning protection and grounding diversion ability of the oil tank can be strengthened.

The invention discloses a lifting tool for a large steel ingot and a large forge piece. The lifting tool for the large steel ingot and the large forge piece comprises two clamp arms and two clamp claws, wherein the lower end parts of the two clamp arms are fixedly connected with the two clamp claws respectively; the middle parts of the two clamp arms are hinged through a pin shaft; a cover plate is installed on the pin shaft; and the two clamp claws are matched to clamp the large steel ingot and the large forge piece. The lifting tool for the large steel ingot and the large forge piece is simple in structure, convenient to install and detach and non-hazardous in operation, is applicable for lifting the large steel ingot and the large forge piece, can be operated only by a crane operator, without needing other auxiliary workers, thus saving manpower to a certain extent, is strong in practicality, can improve the productivity, reduce the labor intensity and the operating dangerousness of working staff, meets lifting requirements of the large steel ingot and the large forge piece, and achieves safe and reliable lifting work; the workpiece clamping principle of the lifting tool for the large steel ingot and the large forge piece is different from that of an ordinary lifting tool, and a clamping force is generated by self weight of a workpiece, so that the lifting tool meets requirements on structural strength and rigidity, has good clamping performance and is material-saving.

The invention relates to a transition roller machine provided with an electronic elevation device used for a head end of a front axle. The transition roller machine comprises a chassis fixed on a mounting top-plate. A plurality of roller shafts which are arranged in parallel are rotationally connected with the chassis of the roller machine and rollers are fixed at two ends of the roller shafts. A covering plate is arranged above the roller shafts and grooves are arranged on the covering plate where rollers exist so as to lead the wheel faces of rollers to partially rise upwards from the grooves; transmission chain wheels are respectively fixed at two ends of the roller shafts; a roller machine motor is arranged on the chassis of one side and a driving chain wheel is fixed on an output shaft of the roller machine motor; a transmission chain is arranged around the driving chain wheel and the transmission chain wheel; and a bottom plate is arranged under the mounting top-plate and an electronic elevation device used for the mounting top-plate is arranged on the bottom plate. When in working, the transition roller machine can realize the transition of work pieces between two roller machines of different heights with an excellent durability and the elevation of work pieces of different weights, and can largely reduce the shake and noise emerging during the elevation process.

The invention relates to a multifunctional fire-fighting truck which comprises an automobile chassis, a storage compartment, a pedal, a water tank body, a fire-fighting pump, an auxiliary girder assembly, a triangular support mechanism, a lifting mechanism, a fire-fighting monitor, a lorry-mounted crane, a towing capstan and a lifting illuminating system. The storage compartment is fixed onto theautomobile chassis, and is formed by a framework structure, and an equipment framework with a layered structure; the framework structure is fixedly connected with the metal material grid type water tank body; the water tank body is connected with a water inlet pipeline of the fire-fighting pump; the tail end of the lifting mechanism is connected with the auxiliary girder assembly through the triangular support mechanism; the triangular support mechanism is arranged in the water tank body; the fire-fighting monitor is connected to the front end of the lifting mechanism; and a liquid outlet pipeline of the fire-fighting monitor is connected with the fire-fighting pump. The multifunctional fire-fighting truck has the advantages that the fire-fighting truck integrating the functions of an emergency rescue fire-fighting truck, a water tank fire-fighting truck and a water tower fire-fighting truck not only has the functions of emergency rescue and fire-fighting rescue, but also has a water tower function.

The invention discloses a hoisting method for an engine room general section of a bulk carrier and a bulk carrier constructed by using the hoisting method. The hoisting method comprises the followingsteps: S1, mounting part of outfitting equipment to the engine room general section of the bulk carrier in the general section stage, and adjusting the rest part of outfitting equipment to be mountedin the dock stage, so that the weight of the engine room general section of the bulk carrier is not greater than the maximum lifting weight of a single gantry crane; S2, hoisting the engine room general section of the bulk carrier to a dock by using a single gantry crane; and S3, in the dock stage, hoisting the rest part of outfitting equipment to the engine room general section of the bulk carrier by using hoisting equipment and installing. Part of equipment installed in the general section is adjusted to be installed in the dock stage, so that the weight of the engine room general section ofthe bulk carrier is reduced, the hoisting requirement of the single gantry crane is met, the scheme that two gantry cranes are originally used for joint hoisting is simplified into one gantry crane,the preparation time is reduced, the crane resources are saved, and the hoisting efficiency is improved.

The invention discloses a horizontal lifting anti-theft door ventilation window. The window comprises a window frame embedded on an anti-theft door and a ventilation door capable of closing a window frame inner opening, the window frame comprises a fixing frame mounted on an anti-theft door ventilation opening from the inner side of the anti-theft door, and a ventilation window panel mounted on the anti-theft door ventilation opening from the outer side of the anti-theft door and matched with the fixed frame for fixing, a ventilation grating is arranged on the ventilation window panel, two vertical sides of the fixed frame inner opening are provided with vertical guide grooves with opposite openings, two vertical sides of the ventilation door are inserted in the two vertical guide grooves,and the horizontal lifting anti-theft door ventilation window further comprises a lifting mechanism capable of enabling the ventilation door to horizontally lift along the two vertical guide grooves,and the ling mechanism is a steel wire hanging, rack and gear or rack pawl lifting mechanism. After the ventilation door of the anti-theft door ventilation window is opened, the ventilation door cannot protrude towards a room, and cannot occupy the indoor space, the influence of the ventilation door on the indoor space is small, normal activity of indoor persons cannot be disturbed, and safety ofthe indoor persons cannot be endangered.

The invention provides a stereo garage lifting mechanism adopting rigid-flexible combination for traction, and relates to the field of stereo garages. The stereo garage lifting mechanism adopting the rigid-flexible combination for traction comprises driving motors, two ball screw rigid traction parts, steel wire ropes, car-carrying platforms, ball coupling devices, lifting connecting pieces, pulleys and lifting control systems. The motor drives the two ball screw rigid traction parts and the two steel wire rope pulley flexible traction parts to achieve the lifting motion of the car-carrying platforms. The ball coupling devices are used for protecting ball screws from being damaged by a bending moment so as to improve the reliability of the ball screws. The lifting control systems can accurately control the driving motors and brakes at the tails of the driving motors to achieve the lifting motion or stopping of maintaining of the platforms, and the steel wire ropes adopt dual winding so as to avoid sudden rope breaking in the lifting process. The stereo garage lifting mechanism adopting the rigid-flexible combination for traction is low in manufacturing cost, safe and reliable, convenient to implement and good in universality, and can satisfy the requirements for lifting of various double-layer or multi-layer lifting cross sliding type stereo garages.

The invention discloses an integrated box type track beam closed chain-driven steel wire rope single beam crane, and relates to the technical field of cranes. According to the crane, a lifting mechanism comprises a hydraulic oil cylinder, a horizontal steering wheel, a fixed pulley group, a movable pulley group, a lifting pulley, a lifting sling, a tail end balance wheel and a fixed end; and an operating mechanism comprises a driving chain wheel, an operating driver, an operating trolley and a driven chain wheel, a track beam is of a plate splicing type semi-closed box type structure, and a trolley track and a chain track are arranged in the inner space of the track beam. According to the integrated box type track beam closed chain-driven steel wire rope single beam crane, the lifting mechanism is arranged inside the integrated box type track beam, so that the lifting clearance size is effectively saved; all the moving parts are located in a hollow cavity inside the integrated box typetrack beam, so that the influence of mud water brought by the external construction environment is effectively isolated, and the service life is prolonged; the equipment load capacity optional rangeis large, so that the lifting and conveying requirements of prefabricated segments with larger weight are met; and a control loop is simple, the electrical principle is simple, and the maintenance iseasy.

The invention provides a novel lifting appliance for transporting a passenger car body. The novel lifting appliance comprises a lifting appliance body and a lifting eye device, wherein the lifting appliance body comprises a main framework and a lifting ring connected with the main framework through a lifting chain; the main framework comprises four lifting points; the lifting eye device comprises lifting claws arranged on the lifting points respectively; lifting point slings are also arranged on the lifting points; each lifting point sling is connected with a U-shaped support through a connecting ring. The novel lifting appliance has the advantages that complete dependence on the upper part side window structure of the passenger car body is avoided; the strength pressure on the upper part side window structure is reduced; the novel lifting appliance is suitable for passenger car bodies with arc side windows, and convertible and semi-convertible sightseeing buses; the lifting requirements of passenger car bodies of almost all structures can be met approximately. Moreover, due to the arrangement of the U-shaped support device, the stability of the passenger car body when the passenger car body is lifted up is enhanced; friction between the lifting belts and the skin of the passenger car body is avoided. Furthermore, manual moving is avoided during the lifting process, so that the labor efficiency is greatly improved, and the potential safety hazard is reduced.

The invention discloses a robot for feeding and discharging roll-shaped materials of a butt-joint machine table. The robot comprises an omni-directional chassis, a lower layer jacking mechanism, an upper layer jacking mechanism, a camera, a swing-out mechanism and a supporting part; the lower layer jacking mechanism comprises a first lifting device carried on the omni-directional chassis and a first linear moving device carried on the first lifting device; the upper layer jacking mechanism comprises a second lifting device carried on the first linear moving device and a second linear moving device carried on the second lifting device; the camera is installed on the swing-out mechanism, and the swing-out mechanism is carried on the omni-directional chassis; and the supporting part is fixed on the second linear moving device.

The invention provides a replacement method of a coiler mandrel. The method comprises a step of hoisting out an old mandrel and a step of reassembling a new mandrel. Research and on-site investigationand measurement find that a coil stripping trolley can still move for 2.1 meters toward the driving side under in the normal gate position, the distance can completely ensure that most part of a mandrel can be pushed out of a coiler rack, the hoisting requirement is met, and tedious dismounting when a coiler is moved out and complicated debugging when the coiler is moved back are omitted. Accordingly, a special tool used for supporting the mandrel to move when the coil stripping trolley horizontally moves the mandrel is mounted on the coil stripping trolley and is matched with an overhead crane, the purpose of replacement by moving out the mandrel under the assistance of the coil stripping trolley is achieved, and the mandrel replacement difficulty and strength are greatly reduced.

The invention relates to a segment crane and a shield tunneling machine. The segment crane comprises two hydraulic oil cylinders and a hydraulic control system, wherein the hydraulic control system comprises two hydraulic loops; each hydraulic loop is provided with a rodless cavity oil way, a rod cavity oil way and a reversing valve; each reversing valve communicates the rodless cavity oil way and the rod cavity oil way of the corresponding hydraulic loop with an oil supply oil way and an oil return oil way so as to control the hydraulic oil cylinder to stretch and retract through the reversing valve; the reversing valve is provided with a locking middle position and used for controlling and locking the rod cavity oil way and the rodless cavity oil way of the corresponding hydraulic loop so as to lock the hydraulic oil cylinder; and a synchronous speed control valve is arranged on the rodless cavity oil way and / or the rod cavity oil way on the two hydraulic loops so as to realize synchronous action of the two hydraulic oil cylinders. Different control modes are selected according to actual working requirements, the two hydraulic oil cylinders can be controlled to act synchronously, the single hydraulic oil cylinder can also be controlled to act, and the actual working requirements are met.

The invention discloses a water chamber clapboard hoisting device which comprises a clamping hoisting hook and an anti-falling hoisting hook which are connected with each other through ropes, wherein the clamping hoisting hook is clamped at one end of the linear edge of a water chamber clapboard; the anti-falling hoisting hook is clamped at one end of the arc edge of the water chamber clapboard. The clamping hoisting hook at the upper part presses the water chamber clapboard according to the lever principle, and the anti-falling hoisting hook at the lower part carries the weight of the water chamber clapboard, so that accidental falling failure of the water chamber clapboard during high-altitude operation is prevented, and the safety of hoisting of the water chamber clapboard is effectively guaranteed. The water chamber clapboard hoisting device is easy to manufacture, convenient to clamp, flexible in operation, low in operation amplitude, safe and reliable, can be repeatedly used, and can meet the hoisting requirement on various water chamber clapboards within a bearing range.

The invention discloses a high-lifting force lifting mechanism of cab side window glass of a bulletproof vehicle. The lifting mechanism comprises a micro motor, a pedestal, and a speed reducer of a pair of worm wheel and worm which are mutually meshed, wherein the micro motor is fixedly arranged on an outer side of the pedestal; the output shaft of the micro motor is inserted into a side hole of the pedestal; and the worm wheel and the worm are positioned in the inner cavity of the pedestal, and the worm is arranged on the output shaft of the micro motor. The lifting mechanism also comprises a screw rod, a nut, a screw rod sleeve and a joint, wherein the screw rod is fixedly connected with the worm wheel by a coupling band; the nut is screwed to sleeve the screw rod; the screw rod sleeve is sleeved on the peripheral wall of the nut in a tight fit way, and positioned at the upper end of the nut; and the joint is fixedly arranged at the upper end of the screw rod sleeve and connected with the window glass. The lifting mechanism has the advantages of small volume, light weight, simple structure and the like, and can completely meet the lifting requirement of the bulletproof glass.

An application method of modeling sand substituting blocks in casting of large cast steel is characterized in that a large cast steel casting technology adopts modeling sand substituting blocks to substitute parts of modeling sand in founding molding to reduce the sand-to-iron ratio and improve the modeling sand permeability, and the modeling sand substituting blocks are waste molten steel casting products with any shape. The application method comprises the following steps: 1, determining the structure, the shape and the dimension of the modeling sand substituting blocks according to the characteristics of the cast steel and the specifications of a sandbox; 2, molding through adopting a routine technology, and using the waste molten steel to cast the modeling sand substituting blocks; 3, marking the disposing positions of the modeling sand substituting blocks in the sandbox; 4, using the modeling sand substituting blocks to substitute parts of the modeling sand in the founding molding of the large cast steel; and 5, opening the sandbox after the casting of the large cast steel is completed, and collecting the modeling sand substituting blocks for later use. The method has the advantages of reduction of the dosage and consumption of the modeling sand, cost reduction, reduction of the weight of the modeling sand, convenience in operation, improvement of the permeability of the modeling sand due to spaces in the modeling sand substituting blocks, and guaranteeing of the quality of casting products.

The invention relates to a portable cable terminal lifting device, and is used for lifting a cable terminal porcelain bushing. The device comprises a telescopic tripod, a winch and a fixed pulley, wherein the telescopic tripod is used for providing supporting and adjusting height; the winch can be adjustably fixed on one supporting leg of the telescopic tripod so as to realize lifting; and a steelsling is wound on the fixed pulley, one end of the steel sling is connected to the winch, and the other end is connected to the to be lifted cable terminal porcelain bushing. Compared with the priorart, the device has the advantages of being convenient to transport and labor-saving, the lifting requirements of the height of the terminal are met, a machine head of a crane can rotate by 360 degrees, and the base is firm.

The invention discloses a method for dragging an upper-layer building of a deepwater drilling ship or maritime work petroleum equipment. The method includes steps of 1, vacating positions for laying three rows of steel plates on a ship berth; 2, longitudinally laying the three rows of steel plates on the ship berth near a wharf until the steel plates reach the bottom of the upper-layer building, and utilizing the steel plates as slide rails; 3, placing three longitudinal box beams on the slide rails and supporting the upper-layer building by the longitudinal box beams; 4, fixedly welding the upper-layer building with the three longitudinal box beams; 5, removing bottom support piers after an upper layer is completely manufactured; 6, coating lubricating oil on the slide rails; 7, dragging the upper-layer building to a side of the wharf by the aid of hoists and labor-saving pulley blocks via the slide rails. The method has the advantages that the distances from the upper-layer building to crane jibs of existing sea cranes can be shortened, hoisting requirements of the upper-layer building can be met, expenses and construction periods for hiring large sea cranes can be saved, the method for dragging the upper-layer building is flexible, convenient, speedy and safe and is high in efficiency, and auxiliary dragging tools are simple in manufacture.

The invention relates to the technical field of maintenance and hoisting of steam turbines, and particularly discloses a hoisting tool for a bearing bush of a steam turbine. The hoisting tool for thebearing bush of the steam turbine comprises an upper cross beam, a lower cross beam and a vertical beam, wherein the upper cross beam and the lower cross beam are connected and fixed by the vertical beam; an upper hoisting lug is arranged on the outer side of the upper cross beam; a lower hoisting lug is arranged on the outer side of the lower cross beam; and the distance between the upper cross beam and the lower cross beam is greater than the diameter of a steam guiding pipe. The problem that the steam guiding pipe needs to be disassembled for overhauling and hoisting a bearing below the steam guiding pipe can be effectively solved, operations such as overhauling and hoisting of the bearing below the steam guiding pipe can be carried out without disassembling the steam guiding pipe, theworkload is reduced, the overhauling time is shortened, and the overhauling cost is saved.

The invention discloses a high-lifting force lifting mechanism of cab side window glass of a bulletproof vehicle. The lifting mechanism comprises a micro motor, a pedestal, and a speed reducer of a pair of worm wheel and worm which are mutually meshed, wherein the micro motor is fixedly arranged on an outer side of the pedestal; the output shaft of the micro motor is inserted into a side hole of the pedestal; and the worm wheel and the worm are positioned in the inner cavity of the pedestal, and the worm is arranged on the output shaft of the micro motor. The lifting mechanism also comprises a screw rod, a nut, a screw rod sleeve and a joint, wherein the screw rod is fixedly connected with the worm wheel by a coupling band; the nut is screwed to sleeve the screw rod; the screw rod sleeve is sleeved on the peripheral wall of the nut in a tight fit way, and positioned at the upper end of the nut; and the joint is fixedly arranged at the upper end of the screw rod sleeve and connected with the window glass. The lifting mechanism has the advantages of small volume, light weight, simple structure and the like, and can completely meet the lifting requirement of the bulletproof glass.

The invention discloses an adjustable lifting bracket device for a buried single-column lifting machine. The device comprises a single-column lifting machine body, the upper end of the single-column lifting machine body is fixedly connected with a rectangular block, the two sides of the rectangular block are fixedly connected with stressed steel pipes respectively, the stressed steel pipes are movably connected into corresponding sliding bases in an inserted mode, the sliding bases are arranged in corresponding saddles, an electric push rod is installed in each saddle, the movable ends of the electric push rods are fixedly connected with the rectangular block, the two ends of each saddle are each provided with an opening U-shaped groove, a drawing base is hinged into each U-shaped groove through a rotating shaft, each drawing base is connected with a bracket through a second electric push rod, each bracket comprises a U-shaped support, a support sliding base is arranged in each drawing base, each U-shaped support is movably installed in the corresponding support sliding base, and a cushion block is arranged on the upper side face of the tail end of each bracket. The adjustable lifting bracket device for the buried single-column lifting machine is novel in structure, stale in running and capable of achieving bracket adjusting and control, meeting lifting requirements of various vehicle types and meeting the using requirement.