An ultra-low temperature loading and unloading arm structure with overflow prevention pipeline

Abstract

The invention relates to an ultralow temperature loading arm structure with an anti-overflowing pipeline. The ultralow temperature loading arm structure comprises an upper rope wheel and outer arm supporting assembly, a trunnion box, an upright post and a nitrogen purging device, wherein the upper rope wheel and outer arm supporting assembly and the nitrogen purging device are respectively arranged at the upper end and the lower end of the upright post; a process pipeline extending outwards is positioned at the central position of the upper rope wheel and outer arm supporting assembly in a connecting manner, and a three-dimensional joint is arranged at the outer end of the process pipeline; meanwhile, an inner arm driving mechanism is arranged on the middle section of the upright post, an outer arm driving mechanism is arranged at the lower part of the upright post, a horizontal driving mechanism is arranged between the inner am driving mechanism and the outer arm driving mechanism, and an electric hydraulic control unit is arranged at the bottom of the upright post. The ultralow temperature loading arm structure has the beneficial effects that electric hydraulic control of global and local mechanisms can be realized; the operation flexibility of inner and outer arms is improved; meanwhile, the ultralow temperature loading arm structure is provided with the nitrogen purging mechanism, so that the problem that the deformation of sealing surfaces is non-uniform under a low temperature is effectively solved.

Description

technical field [0001] The invention relates to fluid loading and unloading equipment, in particular to an ultra-low temperature loading and unloading arm structure with an overflow prevention pipeline. Background technique [0002] The various parts of the rotary joint of the low-temperature crane tube shrink under low-temperature working conditions, and the sealing surfaces of many structures are deformed unevenly, and the sealing structure cannot be guaranteed, so the low-temperature sealing requirements cannot be achieved; at the same time, during the entire loading and unloading process, the air The excess moisture will freeze in the raceway and damage the raceway, resulting in inflexible rotation of the rotary joint. In addition, the existing loading and unloading arm lacks an overflow prevention system, especially for the hydraulic control part on the periphery of the inner arm, that is, the end that is easy to repair, and when the fluid material is delivered to the t...

AI Technical Summary

Problems solved by technology

[0002] The various parts of the rotary joint of the low-temperature crane tube shrink under low-temperature working conditions, and the sealing surfaces of many structures are deformed unevenly, and the sealing structure cannot be guaranteed, so the low-temperature sealing requirements cannot be achieved; at the same time, during the entire loading and unloading process, the air The moisture will freeze in the raceway and damage the raceway, resulting in inflexible rotation of the rotary joint

In addition, the existing loading and unloading arm lacks an overflow prevention system, especially for the hydraulic control part on the periphery of the inner arm, that is, the end that is easy to repair, and when the fluid material is delivered to the tank, the delivery pipeline cannot be automatically closed when the tank is filled with fluid The valves on the tank often cause fluid overflow, especially when transporting fuel oil and chemicals, which poses a great safety hazard; at the same time, the anti-overflow control of three-dimensional joints also needs to be strengthened

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