Limit device

Abstract

The invention discloses a limit device, which is provided with multiple master hydraulic cylinders, wherein hydraulic rods of the multiple master hydraulic cylinders are connected with one push plate, and the push plate is connected with a pulley fork frame. The pulley fork frame is of a U shape. One end of the pulley fork frame is provided with an outwardly oblique angle, and the outwardly oblique one end is pivoted with a Y-shaped wire protection clip. One branch angle of the Y-shaped wire protection clip is matched with the outwardly oblique angle of the pulley fork frame. One end of the bottom of the U-shaped pulley fork frame is provided with outwardly projected projection portion. A cylinder seat of a dynamic hydraulic cylinder of the wire protection clip is fixedly installed in an axle hole of the projection portion of the pulley fork frame, wherein a support pulley is installed in a fork slot of the pulley fork frame, and one end of the wire protection clip is pivoted with a hydraulic cylinder rod of the hydraulic cylinder of the wire protection clip. According to the invention, the position condition for retracting a winch cable and lifting objects can be controlled, the remote control is achieved, the collision between the lifting objects and the ship can be avoided, the safety and the reliability of offshore construction can be increased; and the number of auxiliary works of an auxiliary ship can be reduced, and the economic benefit can be increased.

Description

technical field [0001] The invention relates to a limit device, in particular to a position limiter for retracting and retracting the winch cable of a ship, which is used to control the position of the retractable winch cable and the suspended object, and prevent the retractable winch cable and the suspended object from swaying greatly And the limit device of the collision hull. It belongs to the field of offshore oil engineering. Background technique [0002] With the increasing scope of ocean mining, deep-sea oil development has become an important frontier of the oil industry. The riser system is an important part in the construction of deepwater oil and gas field development projects. When the platform is not in place, the riser must be pre-laid on the seabed when laying the submarine pipeline. After the platform is installed, the riser must be lifted up with a retractable winch or a crane before subsequent operations. [0003] At sea, due to wind, waves and currents,...

AI Technical Summary

Problems solved by technology

[0003] At sea, due to wind, waves and currents, the ship moves. During the process of using the retractable winch to lift the riser, the retractable winch cable will sway greatly, and it is difficult to control the position of the retractable winch cable and the position of the riser, resulting in The collision of the riser and retractable winch cable against the hull not only causes damage to the hull, but also fatal damage to the standpipe, posing a huge safety hazard; at the same time, it also brings great difficulties to the lifting work of the riser

In order to ensure the relatively stable lifting of the riser and reduce the occurrence of accidents, the control requirements for the climate window and construction operation are very strict, and multiple auxiliary ships are required to assist in the operation, and even some large ship resources need to be mobilized, which is relatively safe and economical Difference

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