Sealing structure for butt flange holes of booms of slewing crane

Abstract

The invention relates to a sealing structure for butt flange holes of booms of a slewing crane. The sealing structure comprises a first butt flange and a second butt flange which are matched with eachother; multiple connecting bulges are arranged at one side end of the first butt flange and are formed through combination of cylindrical sections and circular truncated cone-shaped sections which are sequentially arranged from the first butt flange to the second butt flange, and external thread structures are further arranged on the surfaces of the circular truncated cone-shaped sections; multiple through holes which correspond to the connecting bulges and allow the connecting bulges to penetrate through are formed in the second butt flange; and after the connecting bulges on the first buttflange penetrate through the through holes in the second butt flange, the first butt flange and the second butt flange are connected through connection of connecting lock nuts. The sealing structure has the advantages as follows: the connection manner of matching of the connecting bulges, the through holes and the connecting lock nuts is adopted, connecting holes in one of the butt flanges are omitted, and the corresponding sealing effect is improved.

Description

technical field [0001] The invention relates to a crane, in particular to a sealing structure for butt joint flange holes of a rotary crane arm frame. Background technique [0002] Crane is a popular name for cranes, which are widely used in a series of heavy industrial products such as ships, equipment, machinery, and molds. The crane consists of two parts, the power unit and the bracket. The power unit is composed of motor, reducer, clutch, brake, rope drum and wire rope. The motor is a side-magnet single-phase capacitor motor, designed with a braking mechanism when power is off; the motor is also equipped with a thermal switch to prevent the motor from being burned due to overheating; the reducer is a two-stage gear reduction, which is fixed to the motor; the clutch, The brake is integrated with the rope drum, but when the clutch is disengaged, it can achieve rapid descent, and the operation of the brake can control the descending speed to avoid impact. The round hole ...

AI Technical Summary

Problems solved by technology

[0003] At present, for slewing cranes, the butt joint between the booms usually adopts the method of flange butt joint, while the existing flange usually adopts the bolt directly through the mounting hole and then locks the nut to realize the two joint joints. Flange connection, and this type of connection will lead to poor sealing of the flange mounting hole, easy oxidation and rust of the bolts, and even cause the bolts to be unable to be removed from the mounting hole, which will affect the subsequent maintenance of the boom

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