Emergency release device for fluid loading and unloading arm

Abstract

The invention discloses an emergency release device for a fluid loading and unloading arm. The emergency release device comprises an upper ball valve, a lower ball valve, a hydraulic driving mechanism and a hoop mechanism arranged between the upper ball valve and the lower ball valve. The hydraulic driving mechanism comprises a driving oil cylinder and a separating oil cylinder which are connected in series; the driving oil cylinder is connected with the yoke and is used for driving the yoke to slide up and down along the mounting seat; the separation oil cylinder is arranged on the yoke; a four-bar mechanism which can be disconnected in the separation process of the upper ball valve and the lower ball valve is arranged between the valve rod driving shafts of the upper ball valve and the lower ball valve; a shaft sleeve is arranged on the four-bar mechanism and is inserted into a sliding groove horizontally formed in the yoke; the driving oil cylinder drives the four-connecting-rod mechanism to swing through the yoke to achieve synchronous closing of the upper ball valve and the lower ball valve. And an ejector block is arranged at the lower end of the separating oil cylinder and used for pushing the hoop mechanism to be separated. According to the invention, the valve switch can be separated from the valve.

Description

technical field [0001] The invention relates to a key part of liquid conveying equipment, in particular to an emergency release device for ultra-low temperature fluid loading and unloading equipment. Background technique [0002] With the rapid growth of oil, natural gas and other energy imports, fluid loading and unloading arms are also widely used in ports and docks for docking and loading and unloading with ships, and more and more attention is paid to the safety of loading and unloading arms during use. In order to prevent the occurrence of dangerous situations, such as the ship drifting within the normal envelope, causing damage to the loading and unloading arms and causing environmental pollution. When encountering unpredictable reasons such as wind and waves, the ship drifts within the normal envelope, pulls, damages the infusion equipment, leaks the transported liquid, causes marine pollution, and seriously causes the collapse of the liquid loading and unloading arm,...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the traditional loading and unloading arm emergency release devices are driven by only one hydraulic cylinder, resulting in low efficiency and difficult operation

Although the new emergency release device uses two oil cylinders to control the emergency release action separately, there is no safety interlock design between the two hydraulic cylinders, and the mechanical structure is complicated, which increases the failure points of the emergency release mechanism.

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