40results about How to "Improve hoisting stability" patented technology

The invention discloses an auxiliary slinging device and method through combination process of a plurality of cranes. The auxiliary slinging device comprises an auxiliary winch, an elastic auxiliary suspension arm, an auxiliary suspension rope, a turnable auxiliary rotation support, a connecting base and a connecting device for the cranes, wherein the connecting base is connected with main suspension arms of the cranes; the auxiliary rotation support is connected with the connecting base, and the arm tail of the auxiliary suspension arm is hinged to the auxiliary rotation support; the auxiliary wince is arranged on a rotary table of each crane, the auxiliary suspension rope winds the auxiliary winch , and the auxiliary suspension rope winds around the arm head of the auxiliary suspension arm; the main suspension ropes of the cranes wind around the arm head of the main suspension arm to be connected with the auxiliary suspension arm; the connecting device for the cranes is connected with the connecting base, and the auxiliary hoisting method adopts the auxiliary slinging device to sling heavies. The auxiliary slinging device and method, disclosed by the invention, can realize hoist in a large working space for the cranes under the condition of not enlarging the length of an elevating arm, so that the destabilizing resistance and the hoisting stability of the cranes are improved, and the hoisting efficiency is improved.

The invention discloses a balance crane used for hoisting box girders of a steel bridge. The balance crane can accommodate different weights and special structures of box girders. The technical scheme includes that through combination of two balance crane parts and lifting lugs on the balance crane, hoisting stability is greatly improved, and the balance crane is applicable to various hoisting facilities such as big floating cranes and portal cranes; in different production and operation areas, the hoisting advantages can be used maximally, and problems of limited model selection of the balance crane and unbalance loading are avoided. In addition, lifting lugs in different size can be selected according to different specifications of box girders of the steel bridge, slings are reasonably distributed, and therefore different tons of box girders can be hoisted.

The invention relates to a hanging point adjusting type hanging bracket. The hanging point adjusting type hanging bracket comprises a frame and multiple traction assemblies; the frame is provided with multiple hooks used for lifting cargos, one ends of the traction assemblies are connected to multiple portions on the frame, the other ends of the traction assemblies are used for being jointly connected to a crane hanging point, each traction assembly comprises a length adjusting mechanism, and each length adjusting mechanism is used for adjusting the lengths of the traction assemblies in the traction direction. According to the hanging point adjusting type hanging bracket, the hooks of the frame lift the cargoes, the traction assemblies are connected to the crane hanging point, when the gravity of the cargoes and the crane hanging point are not in the vertical direction, the length adjusting mechanisms of the traction assemblies are used for adjusting the lengths of the traction assemblies, the crane hanging point is located over the gravity of the cargoes, the imbalance phenomenon caused by deviating of the gravity of the hung cargoes from the crane hanging point can be avoided, the lifting stability is greatly improved, and safety and work efficiency are high.

The invention belongs to the technical field of aircraft structure design and particularly relates to an aircraft freight cabin door positioning and guiding structure. The structure comprises a cabin door (1), a sliding rail assembly (2) and an uplatch (3). The cabin door (1) is hinged to an aircraft body, the sliding rail assembly (2) is mounted on the aircraft body and the cabin door (1), and the uplatch (3) is mounted on the aircraft body and the cabin door (1). According to the structure, stable and reliable positioning and guiding of the aircraft freight cabin door are achieved.

The invention relates to the technical field of gantry cranes, in particular to a gantry crane device used for bridge construction. The gantry crane device comprises a mounting rack, a cross shaft isarranged on the surface of the mounting rack, a large bearing is arranged on the outer side of the cross shaft in a sleeving manner and is mounted on the inner wall of a casing pipe, a lifting hook isarranged on the surface of the casing pipe, a mounting seat is arranged on the surface of the casing pipe, a shock absorption assembly is arranged on the surface of the mounting seat, the outer sideof the shock absorption assembly is sleeved with a connecting ring, the surface of the connecting ring is connected with a protection frame, a motor is arranged in the protection frame, and a drive shaft of the motor is connected with a lead screw through a transmission assembly. The gantry crane device has the beneficial effects that according to the gantry crane device used for bridge construction, the rotatable casing pipe is additionally arranged in the mounting rack, the lifting hook and a pipe body clamping structure are mounted on the two sides of the casing pipe, switching is carried out according to actual requirements, pipe clamping plates and a translation plate are connected, the translation plate is driven by the lead screw to shift, and therefore the two sets of pipe clampingplates clamp pipe bodies of different pipe diameters, and stability during pipe body lifting is improved.

The invention relates to a gravity center adjusting type lifting frame. The gravity center adjusting type lifting frame comprises a bottom frame, a moving assembly and a traction piece. A lifting hookfor lifting goods is arranged on the bottom frame. The moving assembly is movably arranged on the bottom frame. One end of the traction piece is connected with the moving assembly and the other end of the traction piece is used for connecting a crane. In the gravity center adjusting type lifting frame, the lifting hook of the bottom frame lifts goods (such as a caisson), the traction piece is connected to the crane, and when the gravity center of the goods and the lifting point of the crane are not in the vertical direction, the moving assembly moves on the bottom frame to enable the liftingpoint of the lifting machine to be positioned over the gravity center of the goods, so that the unbalanced lifting phenomenon caused by deviation of the gravity center of the lifted goods and the lifting point is avoided, the lifting stability is greatly improved and the safety and the working efficiency are high.

The invention discloses an awning mounting lift. The awning mounting lift comprises an outer tube profile (1), an inner tube profile (2), a lifting frame (3), a transmission lifting system (4), a base profile tube (5), a base supporting frame (6), a supporting tube (7), sliding blocks (8) and a power line band (9), wherein the outer tube profile (1) is connected with the base profile tube (5), the base supporting frame (6) and the supporting tube (7); a square opening for arranging a right-angle motor is formed in the inner tube profile (2), an opening for mounting a chain is formed in the side face of the inner tube profile (2), and a sliding slot for arranging the lifting frame (3) is formed in the front surface of the inner tube profile (2); the lifting frame (3) is connected with the chain of the transmission lifting system (4); the transmission lifting system (4) consists of the motor, the chain, a gear and a mounting component; a chute for mounting the base supporting frame (6) is formed in the base profile tube (5); the base supporting frame (6) is connected with the outer tube profile (1) and the base profile tube (5) through the sliding blocks (8); the supporting tube (7) is connected with the outer tube profile (1) through the sliding blocks (8); the sliding blocks (8) consist of iron plates and screws; the power line bank (9) is clamped in a notch of the outer tube profile (1) and is connected with the motor.

The invention discloses a lifting tool for a single-cylinder air compressor. The lifting tool comprises a lifting rod, a connecting plate assembly, and an adjusting-plate lifting ring assembly, wherein the lifting rod is a Z-shaped column with a round section and specifically comprises a long rod, a short rod and a connecting rod; the long rod is positioned at the upper part and extends horizontally; the short rod is positioned at the lower part and extends horizontally; the connecting rod extends longitudinally and is used for connecting the long rod and the short rod; the connecting plate assembly comprises a connecting plate and a round pin; the connecting plate is in a long-stripy plate shape, one end of the connecting plate is detachably arranged at the position of the short rod of the lifting rod, and the round pin is fixed at the other end of the connecting plate; the adjusting-plate lifting ring assembly comprises an adjusting plate, a U-shaped locking block and a lifting rod; the adjusting plate is in a long-stripy plate shape, one end of the adjusting plate is detachably arranged at the position of the long rod of the lifting rod and the other end of the adjusting plate is provided with a long waist-shaped hole; the U-shaped locking block is adjustably arranged on the long waist-shaped hole, and the lifting ring is fixedly connected with the top end of the U-shaped locking block. The lifting tool disclosed by the invention has the advantages that the assembling round hole in an installation plate for connecting the air compressor and an engine is used as a lifting point, so that the lifting stability and the lifting efficiency are high respectively, and the labor intensity can be reduced.

The invention discloses a paper tube lifting frame which comprises a paper tube lifting plate, and paper tube end part positioning assemblies arranged on two sides of the paper tube lifting plate. Twoends of the paper tube lifting plate are connected with an upper top plate through side baffle plates; a lifting thread sleeve is arranged in the middle of the upper top plate; an adjusting screw pinis arranged in the lifting thread sleeve in a penetrating way; each paper tube end part positioning assembly comprises a support bottom plate; a paper tube end part baffle plate is connected to one side, far away from the paper tube lifting plate, of each support bottom plate; each support bottom plate is connected with the upper end of the adjusting screw pin through a pull rope; stop blocks areperpendicularly connected to two ends of the support bottom plates; and a lifting ring is connected to the upper end of the adjusting screw pin. The paper tube lifting frame is specially used for lifting and transferring paper tubes and is convenient to operate.

The invention discloses a tap changer hoisting maintenance tool and relates to the technical field of transformer maintenance, in particular to a tap changer hoisting maintenance tool. The tap changerhoisting maintenance tool which is simple in structure and features reliable hoisting and safety improvement is provided. The tool comprises a supporting mechanism, a hoisting mechanism and a pair ofauxiliary jacking mechanisms; The supporting mechanism comprises a cross arm, a pair of symmetrically-arranged Y-shaped supports and a pair of bases, the upper ends of the Y-shaped supports are movably connected with the cross arm, the lower ends of the Y-shaped supports are connected with the bases correspondingly, the bases are provided with support holes correspondingly, the Y-shaped supportsare arranged in the support holes correspondingly, and the pair of bases are symmetrically arranged on a steel ring arranged above a tap changer. The tap changer hoisting maintenance tool provided bythe invention is convenient to machine, capable of saving labor, safe and reliable.

The invention discloses a rear door automatic elevator for an electric vehicle, which comprises two mounting and supporting mechanisms, two treading mechanisms and a transmission sleeve, wherein eachof the two mounting and supporting mechanisms comprises a mounting plate and an adjusting plate; the two mounting and supporting mechanisms are distributed front and back. And the left ends of the opposite side walls of the two mounting plates are fixedly connected with the two axial ends of the transmission sleeve in an inserted mode correspondingly, each adjusting plate is welded to the left side of the bottom end face of the corresponding mounting plate in the mode of inclining leftwards and downwards by 60 degrees, and the two treading mechanisms each comprise a plurality of first hinge rods, a plurality of second hinge rods and a plurality of mounting back plates. The mounting plates of the two mounting and supporting mechanisms are fixedly mounted below the rear door of the electricvehicle, and goods can be conveniently transferred and carried up and down by stretching and retracting the pedal between the two treading mechanisms at any time.

The invention provides hoisting equipment and a hoisting method for external transportation of a super high-rise building. The hoisting equipment comprises mast lifting devices arranged pairwise; each mast lifting device comprises a fixed mast, an amplitude variable mast, a mast base, a hoisting connecting device, an amplitude variable adjustment hoist, an indoor traction hoist and a winch. The hoisting equipment is mounted, the winches are started to hoist a heavy object to an operation floor and to a place above the ground level of the operation floor, hand chains of the amplitude variable adjustment hoists are pulled, the amplitude variable masts are driven to rotate in the indoor direction and change amplitudes and drive the heavy object to move to the interior, after the gravity center of the heavy object is transferred to the interior, the heavy object is fixedly connected with the indoor traction hoists, hand chains of the indoor traction hoists are pulled and the heavy object is completely transferred to the interior, jack-up hoisting ropes are dismounted, and the heavy object is transported to other positions of the operation floor through a carrying tankette. The hoisting equipment is simple in structure, and can meet the hoisting requirements of floors at different heights and equipment in different sizes, particularly on the working condition that an outdoor site is narrow, the cost is saved, and the construction schedule is accelerated.

The invention belongs to the technical field of aircraft structure design and particularly relates to an aircraft freight cabin door positioning and guiding structure. The structure comprises a cabin door (1), a sliding rail assembly (2) and an uplatch (3). The cabin door (1) is hinged to an aircraft body, the sliding rail assembly (2) is mounted on the aircraft body and the cabin door (1), and the uplatch (3) is mounted on the aircraft body and the cabin door (1). According to the structure, stable and reliable positioning and guiding of the aircraft freight cabin door are achieved.

The invention discloses a hydrogenation reactor for petrochemical engineering and belongs to the technical field of petrochemical engineering. An inlet distributor is fixed on an upper spherical cover, a catalyst entering the hydrogenation reactor is fully dispersed and diffused, full contact between crude oil and the catalyst is realized, the crude oil is fully cracked and decomposed in a refining device, and the effective utilization rate of the catalyst can be increased. An outlet collector is placed at the bottom of a lower spherical cover and can recycle the catalyst which is not fully utilized by the crude oil, effective utilization of the catalyst is further improved, the crude oil refining cost is reduced, and the crude oil refining benefits are increased. A longer thermocouple isreliably fixed on the inner wall of the hydrogenation reactor in an inner extension tube support manner, the structural strength of a thermocouple sleeve is improved, and bending or damage to the thermocouple sleeve during usage is avoided.

The invention relates to a lorry-mounted crane for rescue and a using method thereof, and aims to solve the problems that a lorry-mounted crane in the prior art is easy to vibrate and low in operation precision during operation. Comprising a driving vehicle, a movable arm, a first swing oil cylinder, a hoisting arm and a supporting device, a rotary supporting platform is arranged on a frame of the driving vehicle; the first end of the movable arm is hinged to the rotary supporting platform; the first end of the first swing oil cylinder is hinged to the rotary supporting platform, the second end of the first swing oil cylinder is hinged to the movable arm, the first end of the hoisting arm is hinged to the second end of the movable arm, a hoisting device is arranged on the hoisting arm and comprises a linear motion mechanism and a hoisting hoist, and the linear motion mechanism is connected with the hoisting hoist. The linear motion mechanism does reciprocating linear motion along the extension direction of the hoisting arm, and the hoisting hoist is arranged on the linear motion mechanism; and the supporting device is detachably connected with the second end of the hoisting arm.

The invention discloses an integral hoisting sling for long vertical steel bars, which is used for lifting multiple steel bars at one time, and is characterized in that it includes an upper hoisting beam connected by a steel wire rope and a lower socket-type steel bar swing-proof limiting device. The hoisting beam includes splints on both sides to clamp the steel bars by bolt locking; the socket-type steel bar anti-sway limit device includes a socket-type steel bar limit seat, and the socket-type steel bar limit seat is horizontally arranged side by side. Intervals are provided with limit sockets for corresponding insertion of each hanging steel bar, and a lock plate for locking the steel bars in the limit sockets is also included, and the lock plate is fixed with the socket-type steel bar limit seat by bolts. The spreader can vertically lift multiple super-long and large-diameter steel bars in the same row at one time. Swing problems under the influence of eccentric loads.

The invention relates to an eccentric lifting appliance and a lifting method for a marine high-pressure dual-fuel main engine cylinder cover exhaust valve. The eccentric lifting appliance comprises a lifting plate, a lifting eye bolt, a connecting bolt, a plug pin and a fixing bolt, wherein the lifting plate comprises a horizontal transverse plate part and a vertical plate part which extends downwards from one end of the transverse plate part, the connecting bolt penetrates through the transverse plate part to be connected with a top threaded hole of the exhaust valve, the pin penetrates through the vertical plate part to be inserted into a hydraulic pipe mounting hole of the exhaust valve, the fixing bolt penetrates through the vertical plate part to be connected with a hydraulic pipe mounting threaded hole of the exhaust valve, then the eccentric lifting appliance is fixedly connected with a cylinder cover exhaust valve assembly, the lifting eye bolt is fixedly connected with the transverse plate part by means of threads, a connecting position is located above the gravity center of the cylinder cover exhaust valve assembly, and the eccentric lifting appliance lifts the cylinder cover exhaust valve assembly with a gas control block stably and safely by means of the lifting eye bolt. According to the lifting appliance, the influence of eccentricity caused by the gas control block on lifting is avoided, and the lifting stability and safety of the cylinder cover exhaust valve assembly with the gas control block are effectively improved.

The invention provides a rotary distributor with convenient lifting transporting performance. The rotary distributor comprises a distributor main body, wherein a motor is fixedly connected to the lower side surface of the distributor main body, a lifting ring is welded and fixed to the upper portion of the distributor main body, a left fixing plate and a right fixing plate are arranged below the lifting ring, the left fixing plate is located on the left side of the right fixing plate, an inserting rod is connected to the left fixing plate in an inserted mode, the right portion of the insertingrod penetrates through a round pipe and the right fixing plate and is connected with a first nut through threads, and the round pipe is located between the left fixing plate and the right fixing plate. Compared with the prior art, the rotary distributor has the following beneficial effects that a rope and a lifting hook penetrate through the inserting rod and is hooked on the lifting ring, the joint stress is achieved through the lifting ring, the left fixing plate and the right fixing plate, the stress area is enlarged, the single stress of the lifting ring is avoided, and therefore the lifting stability and safety of the rotary distributor are improved.

The invention discloses an auxiliary slinging device and method through combination process of a plurality of cranes. The auxiliary slinging device comprises an auxiliary winch, an elastic auxiliary suspension arm, an auxiliary suspension rope, a turnable auxiliary rotation support, a connecting base and a connecting device for the cranes, wherein the connecting base is connected with main suspension arms of the cranes; the auxiliary rotation support is connected with the connecting base, and the arm tail of the auxiliary suspension arm is hinged to the auxiliary rotation support; the auxiliary wince is arranged on a rotary table of each crane, the auxiliary suspension rope winds the auxiliary winch , and the auxiliary suspension rope winds around the arm head of the auxiliary suspension arm; the main suspension ropes of the cranes wind around the arm head of the main suspension arm to be connected with the auxiliary suspension arm; the connecting device for the cranes is connected with the connecting base, and the auxiliary hoisting method adopts the auxiliary slinging device to sling heavies. The auxiliary slinging device and method, disclosed by the invention, can realize hoist in a large working space for the cranes under the condition of not enlarging the length of an elevating arm, so that the destabilizing resistance and the hoisting stability of the cranes are improved, and the hoisting efficiency is improved.

The invention discloses a medium-voltage hoisting cable for a super high-rise building and a production installation process thereof. The cable comprises three insulated wire cores, three filling strips, a reinforced layer and an outer sheath layer; the three insulated wire cores are pairwise tangent; an included angle of extension lines of circle centers of the adjacent insulated line cores is 120 degrees; each of the filling strips consists of a composite reinforced core located in the center and a filling body coated at the outside of the composite reinforced core; the composite reinforcedcores are located in the center of the filling body; the included angle of a center line of the three composite reinforced cores is 120 degrees; and a cross-section shape of the filling body is the same as that of a gap between two adjacent insulated line cores and the reinforced layer. According to the cable disclosed by the invention, the composite cores are adopted as bearing cores and are disposed in the filling strips, the tensile resistance of the cable can be greatly improved, the hoisting safety margin of the hoisting cable is improved, the cable weight is light, the periphery of the cable is fixed without a steel wire, and the construction difficulty is low.

The invention provides a straight-handle double-hook lifting hook suitable for a flat sling. The straight-handle double-hook lifting hook comprises a straight handle and a transverse handle, the lowerend of the straight handle is fixed to the middle of the transverse handle, vertically-upward hook parts are arranged at the two ends of the transverse handle respectively, and ball head structures are arranged at the top ends of the hook parts; the transverse handle is of a flat structure, the upper surface of the transverse handle is a horizontal bearing face, and the two side faces of the transverse handle are vertical faces; the inner surfaces of the hook parts are perpendicular to the bearing surface; the inner surfaces of the hook parts and the bearing surface are in arc transition, andthe bearing surface and the vertical faces are in fillet transition; and the straight handle comprises a fixed section, a matching shaft section and a connecting section, the fixed section is fixed with the transverse handle, and an external thread structure is arranged on the connecting section. According to the lifting hook provided by the invention, the bearing face and the vertical faces makecontact with the sling, the overall stress face of the lifting hook is increased, stress is uniform, the sling is not damaged, the service life of the sling is prolonged, the contact position of thesling and the lifting hook is not prone to deformation, and the lifting stability is high.

The invention discloses a balance crane used for hoisting box girders of a steel bridge. The balance crane can accommodate different weights and special structures of box girders. The technical scheme includes that through combination of two balance crane parts and lifting lugs on the balance crane, hoisting stability is greatly improved, and the balance crane is applicable to various hoisting facilities such as big floating cranes and portal cranes; in different production and operation areas, the hoisting advantages can be used maximally, and problems of limited model selection of the balance crane and unbalance loading are avoided. In addition, lifting lugs in different size can be selected according to different specifications of box girders of the steel bridge, slings are reasonably distributed, and therefore different tons of box girders can be hoisted.

Indoor hoisting equipment comprises a frame, a jacking device, a suspension, a winch and a hanging bracket. The jacking device is arranged on the frame. The suspension is arranged on the jacking device. The winch is arranged on the frame. The hanging bracket is hung on the suspension through a steel wire rope and connected with the winch, and when the jacking device lifts and supports the indoor top face, the winch pulls the hanging bracket through the steel wire rope to hoist components hung on the hanging bracket. According to the embodiment, the jacking device is jacked on a roof to form firm support, and the suspension is lifted to the top and kept stable, so that materials are lifted through the hanging bracket pulled by the steel wire rope, a scaffold does not need to be erected, manual carrying at a high place is not needed, time and labor are saved, personnel are safer, punching on the structure is not needed, the structure stability is guaranteed, the equipment can move indoors after the jacking device falls and roof jacking is stopped, after the equipment moves to a new position, the jacking device then supports the roof for fixing, the equipment conducts lifting, the position of the lifting work is convenient to adjust, the use flexibility is higher, and the problems that a current indoor lifting mode wastes labor and time, is poor in safety and has structural damage are solved.

The invention discloses a planting device of rice seedlings. The planting device comprises a top support and a side connecting box body, a matching inner cavity is formed in the top support, an inner cavity is formed in the side connecting box body, the top support extends into the side connecting box body to be connected with the side connecting box body in a sliding fit mode, a side internal motor is arranged in an end wall of the matching inner cavity, a lower side threaded rod is arranged on one side of the side internal motor in a power connection mode, a rotating threaded rod is rotatably arranged in the end wall of the matching inner cavity, a driving gear is arranged on an outer surface of the lower side threaded rod, and a driven gear is arranged on an outer surface of the rotating threaded rod. According to culture box bodies of different specifications, the device can adjust a distance between the top support and the side connecting box body and can also ensure that when a push-out air cylinder rod hoists the top support and the side connecting box body, the push-out air cylinder is located in a middle position between internal motors on two sides.

The invention discloses a roof truss hoisting method. The roof truss hoisting method is conducted according to the following steps that (1) in a site, n roof trusses are first assembled to form a rooftruss system, and n is equal to or greater than 2; (2) at least two carrying poles playing a supporting role are welded at the bottom of a lower chord of the roof truss system in the length directionof the roof truss system; (3) four hoisting points are selected on an upper chord of the roof truss system, and then the roof truss system is hoisted by a crane to the position of a pre-embedded plate at the top of a prefabricated column to complete the installation; and (4) the roof truss system and the carrying poles playing the supporting role are split, and the carrying poles are hoisted to the ground by the crane. The roof truss hoisting method does not require workers to work high above the ground, the hoisting stability of the multiple roof trusses is improved by welding the carrying poles playing the supporting role, and thus the roof truss hoisting method is simple, convenient and high in efficiency and safety.

The invention discloses a vertical suspension laying cable for ultra-deep mines and a production process thereof, wherein the cable includes a first section and a second section connected to each other, and the first section is placed vertically in a vertical shaft during laying; the first section The section and the second section include a continuous sheath and a cable core of different structures in the sheath; the cable core includes a continuous insulated core and a two-stage filling layer arranged outside the insulated core; the two-stage The filling layer includes the load-bearing unit arranged in the first section and the polypropylene filling arranged in the second section; the sheath includes an inner sheath, an armor layer and an armor layer arranged outside the cable core in sequence from inside to outside. outer sheath. The cable of the present invention is divided into the first section and the second section, which meet the performance requirements of different sections. The cable is continuously cabled without intermediate joints to avoid potential risks; the first section of the present invention is provided with a load-bearing unit to improve the tensile performance of the cable, and The weight of the cable is reduced, and the safety margin for hoisting and long-term operation of the ultra-deep mine vertical cable laying is improved.

The invention discloses a gasification equipment and steel structure cross installation adjusting device. The gasification equipment and steel structure cross installation adjusting device comprises a cross installation adjusting mechanism body, a cross installation adjusting layer installed at the upper end of the cross installation adjusting mechanism body, a cross moving mechanism, a central cross turntable, four-corner turntables and adjusting rails. A hoisting layer is installed below the cross installation adjusting layer, and a steel structure supporting layer is installed below the hoisting layer. A bottom fixing layer is mounted below the steel structure supporting layer. The cross moving mechanism is mounted on the lower surface of the cross installation adjusting layer and is arranged in an X shape. The central cross turntable is mounted in the middle of the cross moving mechanism. The four-corner turntables are mounted at four corners of the cross moving mechanism. The adjusting rails are mounted on the outer walls of the front end surfaces of the central cross turntable and the four-corner turntables. According to the gasification equipment and steel structure cross installation adjusting device, gasification equipment and a steel structure are convenient and fast to mount and adjust in a crossed manner in the mounting process, and the problem of limitation in the mounting process is solved.

The invention relates to the technical field of gantry cranes, in particular to a gantry crane device used for bridge construction. The gantry crane device comprises a mounting rack, a cross shaft isarranged on the surface of the mounting rack, a large bearing is arranged on the outer side of the cross shaft in a sleeving manner and is mounted on the inner wall of a casing pipe, a lifting hook isarranged on the surface of the casing pipe, a mounting seat is arranged on the surface of the casing pipe, a shock absorption assembly is arranged on the surface of the mounting seat, the outer sideof the shock absorption assembly is sleeved with a connecting ring, the surface of the connecting ring is connected with a protection frame, a motor is arranged in the protection frame, and a drive shaft of the motor is connected with a lead screw through a transmission assembly. The gantry crane device has the beneficial effects that according to the gantry crane device used for bridge construction, the rotatable casing pipe is additionally arranged in the mounting rack, the lifting hook and a pipe body clamping structure are mounted on the two sides of the casing pipe, switching is carried out according to actual requirements, pipe clamping plates and a translation plate are connected, the translation plate is driven by the lead screw to shift, and therefore the two sets of pipe clampingplates clamp pipe bodies of different pipe diameters, and stability during pipe body lifting is improved.

The invention discloses a lifting and hoisting combined construction platform for a prefabricated building. The lifting and hoisting combined construction platform comprises a base body, a hydraulic rod, an electric pushing rod and a supporting shaft; a supporting rod is rotationally connected at the upper end of the base body; the hydraulic rod is connected on the upper surface of the middle endof the base body through a bearing; a first bearing is mounted at the upper end of the supporting rod in a penetrating manner; a mounting seat is fixedly connected on the outer side of the first bearing and is connected with the output end of the hydraulic rod; a butt-joint disk is mounted on the inner side of the left end of the base body in a penetrating manner; a first steel wire rope is connected on the outer side of the butt-joint disk through a bearing; and the tail end of the first steel wire rope is connected with the outer surface of the first bearing. According to the lifting and hoisting combined construction platform for the prefabricated building, height position adjustment is performed with upward movement of the mounting seat, and a limiting rod is self-locked and limited ina clamping groove in the corresponding position of the outer surface of a moving wheel, so that the dangerous phenomenon that the base body with the gravity center shifted is prone to position shifting is avoided, and the use safety of the whole platform is further enhanced.

The invention relates to a gravity center adjusting type lifting frame. The gravity center adjusting type lifting frame comprises a bottom frame, a moving assembly and a traction piece. A lifting hookfor lifting goods is arranged on the bottom frame. The moving assembly is movably arranged on the bottom frame. One end of the traction piece is connected with the moving assembly and the other end of the traction piece is used for connecting a crane. In the gravity center adjusting type lifting frame, the lifting hook of the bottom frame lifts goods (such as a caisson), the traction piece is connected to the crane, and when the gravity center of the goods and the lifting point of the crane are not in the vertical direction, the moving assembly moves on the bottom frame to enable the liftingpoint of the lifting machine to be positioned over the gravity center of the goods, so that the unbalanced lifting phenomenon caused by deviation of the gravity center of the lifted goods and the lifting point is avoided, the lifting stability is greatly improved and the safety and the working efficiency are high.