Offshore drilling platforms and lifting devices for offshore drilling platforms

Abstract

The invention discloses a lifting device of a marine drilling platform. The lifting device comprises a motor (300). The output end of the motor (300) is a gear end, and the gear end is engaged with a pile leg of the marine drilling platform so as to form a gear and rack mechanism. The lifting device further comprises a determination module (100) and a control module (200). The determination module (100) is used for determining the target output torque of the motor (300) according to the weight of a platform body of the marine drilling platform. The control module (200) and the determination module (100) are both connected with the motor (300) and used for controlling the actual output torque of the motor (300) to be not smaller than the target output torque. The invention further discloses the marine drilling platform. According to the above scheme, the problem that in the current lifting device working process, load transfer is too small and too large can be solved.

Description

technical field [0001] The invention relates to the technical field of marine operations, in particular to an ocean drilling platform and a lifting device for the ocean drilling platform. Background technique [0002] Offshore drilling platform is an important part of ocean engineering. Offshore drilling platforms are usually used in offshore oil extraction, tunnel construction, ocean exploration and other work. Please refer to figure 1 , figure 1 It is a schematic diagram of the structure of a typical offshore drilling platform. figure 1 The shown offshore drilling platform includes a platform body 01 , a plurality of lifting devices 02 and a plurality of legs 03 . Wherein, each pile leg 03 is fixed on the seabed 05, and each pile leg 03 cooperates with the lifting device 02 in a one-to-one correspondence. The platform body 01 is connected to a plurality of legs 03 through the lifting device 02 fixed thereon, and the plurality of lifting devices 02 drives the platform ...

AI Technical Summary

Problems solved by technology

When the transferred load is too large, the load output by the motor of the lifting device is too large, and the load transfer torque exceeds the normal value, especially for the locking device without automatic unlocking function, the transfer of too much load will lead to excessive torque in the opposite direction. Load (the upper edge of the meshing teeth of the meshing locking block 062 is closely attached to the rack 031), the locking device still bears a large load, and the unlocking fails; when the transferred load is too small, the output load of the motor of the lifting device is small, Then the load transfer will not be in place (the lower edge of the meshing teeth of the meshing locking block 062 is in close contact with the rack 031), so that the locking device fails to unlock due to the large load.

Images