Hydraulic control system of ocean platform hoisting mechanism

Abstract

The invention discloses a hydraulic control system of an ocean platform hoisting mechanism, and belongs to the technical field of hydraulic control systems of ocean platforms. The hydraulic control system comprises a hand-operated pilot control valve set, a hydraulic control reversing main valve set, a balance valve set, a hydraulic variable control valve set and a two-position four-way reversing valve. A first oil outlet and a second oil outlet of the hand-operated pilot control valve set are communicated with a first control oil opening and a second control oil opening of the hydraulic control reversing main valve set respectively. A first oil outlet and a second oil outlet of the hydraulic control reversing main valve set are communicated with a rising cavity of a hydraulic motor and a falling cavity of the hydraulic motor respectively through the balance valve set. The hydraulic variable control valve set is communicated with a control oil opening of the two-position four-way reversing valve. An oil inlet of the two-position four-way reversing valve is communicated with the first oil outlet of the hydraulic control reversing main valve set. A first work oil opening and a second work oil opening of the two-position four-way reversing valve are communicated with a minimum variable cavity of the hydraulic motor and a maximum variable cavity of the hydraulic motor respectively. By controlling the displacement switching of the hydraulic motor, the hoisting mechanism has the function of switching between the light-load high speed and the heavy-load low speed and meets the requirement for explosion prevention.

Description

technical field [0001] The invention relates to the technical field of hydraulic control systems for offshore platforms, in particular to a hydraulic control system for lifting mechanisms of offshore platforms. Background technique [0002] Lifting mechanisms such as cranes are often used in the engineering equipment of ships and offshore platforms. The hydraulic control system of the lifting mechanism is very complicated. The performance of the hydraulic control system of the lifting mechanism directly affects the working efficiency of the crane, especially in terms of safety and stability. [0003] In the prior art, in the more advanced ship or offshore platform engineering equipment, high-voltage motor wire ropes are used for hoisting in the hoisting mechanism. Controlling the variable displacement of the motor is mainly to drive the electromagnetic valve on the hydraulic motor through the electric signal to realize the variable displacement control of the motor. [000...

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Problems solved by technology

[0006] In order to solve the problem that the variable displacement of the hydraulic motor has a large impact on the system pipeline when the lifting mechanism on the ship or offshore platform uses the control method of the variable displacement of the electric control motor in the prior art, and the electronic control method does not meet the requirements of some ships or For the problem of explosion-proof requirements on the offshore platform, the embodiment of the present invention provides a hydraulic control system for the lifting mechanism of the offshore platform

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