4results about How to "Solve lifting problems" patented technology

A method for adjusting the counterweight of a large crawler crane in a coke oven renovation project is characterized by the following steps: a) Selecting a crawler crane based on the distance between the guide rail and the coke oven, lifting capacity, lifting radius, lifting height, dimensions of a single main truss component, and the center of gravity of the component; b) Assembling the main steel truss; c) Conducting a pre-stress test in the crawler crane's travel area; d) Designing and fabricating several temporary supports; e) Preparing for dual-crane lifting with the crawler crane; f) Lifting the main steel truss to a position where the crawler crane, in non-overlift mode, meets the rated lifting capacity requirement; g) Removing the overlift counterweight of the crawler crane at the end platform using an auxiliary crane; h) The main truss is first positioned by passing around the crawler crane from the outside of the guide rail to the temporary support in front of the coke oven; i) The crawler crane at the end platform travels a certain distance unloaded towards the intermediate platform; j) The two crawler cranes, using the same lifting radius, lift the main truss into position synchronously. This invention has the advantages of assembling the main truss without affecting coke oven production and meeting the site and time requirements for coke oven maintenance.

The utility model discloses a well drilling connector conveying device and an adjustable well drilling connector balance hoisting device, and relates to the technical field of petroleum drilling engineering, the adjustable well drilling connector balance hoisting device comprises a hoisting main body, the hoisting main body comprises a first arm, a second arm and a third arm, the included angle between the third arm and the second arm is an obtuse angle, and the hoisting main body comprises a first connecting rod and a second connecting rod; an assembling part is arranged at the end of the first arm and used for detachably installing a well drilling connector, and a connecting pin hole and a balance pin hole are formed in the end of the third arm. The U-shaped lifting lug is used for being matched with a lifting device; the balance adjusting device comprises a tool holder part and a blade part, the first mounting hole is used for mounting the U-shaped lifting lug, the blade part is provided with a second mounting hole aligned with the connecting pin hole and a plurality of adjusting holes distributed at intervals, the second mounting hole is used for mounting a connecting shaft pin, and when the blade part rotates, different adjusting holes are aligned with the balance pin hole so as to mount a balance shaft pin. The device can effectively solve the drilling connector hoisting problem.

The utility model provides a lifting appliance for lifting a special-shaped steel beam of a suspension bridge, which comprises a longitudinal bridge direction lifting lug, a transverse bridge direction lifting lug and a connecting plate, the longitudinal bridge direction lifting lug and the transverse bridge direction lifting lug are fixedly connected through connecting profile steel, the longitudinal bridge direction lifting lug and the transverse bridge direction lifting lug are both in pin joint with steel plate strips, the other ends of the steel plate strips are both in pin joint with the connecting plate, and the connecting plate is in pin joint with the longitudinal bridge direction lifting lug and the transverse bridge direction lifting lug. And the top end of the connecting plate is connected with hoisting equipment. According to the crane for hoisting the special-shaped steel beam, the longitudinal-bridge-direction lifting lugs and the transverse-bridge-direction lifting lugs are connected with the transverse partition plates and the joints of the transverse partition plates and the longitudinal partition plates of the special-shaped steel beam correspondingly, then the connecting plates, the steel plate strips, the hoisting steel cables and hoisting equipment are connected, and hoisting of the special-shaped steel beam is achieved. The lifting appliance is low in lifting construction cost, safe, reliable and convenient to mount and dismount, solves the lifting problem of the special-shaped steel beam, and can provide beneficial reference for other similar engineering construction.

This solution relates to the field of industrial printers. Specifically, it provides a positioning method for a positioning frame of a large-format printer, based on the following structure: a support structure, a conveyor belt lifting mechanism, and a positioning mechanism. The support structure includes multiple sets of support units; the conveyor belt lifting mechanism includes multiple sets of conveyor belt assemblies, a transmission part, and a drive device; the positioning mechanism includes a lateral positioning unit, a lateral drive device, a longitudinal positioning unit, and a longitudinal drive device. This invention can completely move large-format printing media from an external conveying platform to the calibration position, and also makes the printing media more evenly stressed, which is beneficial to improving the printing effect, increasing the yield of industrial printing, and facilitating the movement of large-size and heavy printing media; thus solving the problem of moving large-format printing media to the calibration position and aligning them.