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

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 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 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 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 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 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 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.

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.