Single pipe loading and unloading arm for low-temperature ship

A loading and unloading arm, single-pipe technology, used in packaging, distribution devices, transportation and packaging, etc., can solve the problems of large temperature difference and large internal stress in the support structure and pipeline system, to eliminate internal stress, ensure safety, and design reasonable Effect

Active Publication Date: 2016-08-17
优必得流体科技设备(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above existing problems, the present invention discloses a low-temperature marine single-tube loading and unloading arm. The technical solution is simple and compact in structure. When the LNG marine loading and unloading arm is not connected to the ship, the whole set of equipment is at ambient temperature (initial state) , the stress caused by the temperature deformation of the whole set of equipment can be ignored at this time; when the LNG ship is connected to the ship with the loading and unloading arm, the temperature difference between the support structure and the piping system is particularly large, and the difference in deformation due to temperature is also relatively large. The supporting system and piping system are in a state of free expansion and contraction, which will solve the problem of excessive internal stress caused by temperature deformation; when the LNG marine loading and unloading arm finishes working and returns to the ambient temperature, the piping system will return to its original state due to the increase in temperature

Method used

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  • Single pipe loading and unloading arm for low-temperature ship
  • Single pipe loading and unloading arm for low-temperature ship
  • Single pipe loading and unloading arm for low-temperature ship

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see Figure 1-Figure 4 , a low-temperature marine single-pipe loading and unloading arm, the single-pipe loading and unloading arm includes a support structure, a piping system, a hydraulic drive system, a maintenance platform 23, a nitrogen purge system 14, an emergency release system 15, a hydraulic substation 2, and an upper sheave 12. The steel wire rope 4 and the lower sheave 5, the steel wire rope is arranged between the upper sheave and the lower sheave, the support structure is used to support the pipeline system of the entire single-tube loading and unloading arm, and the maintenance platform is arranged on the loading and unloading arm In the upper part, the nitrogen purge system is set under the loading and unloading arm, and the hydraulic substation is set on the side of the column. The loading and unloading arm is also provided with a counterweight 6 arranged at the tail of the support box, a flange interface 13 arranged at the bottom, and a quick joint 17 ...

Embodiment 2

[0026] see figure 1 , Figure 4 , Pic 4-1 , as an improvement of the present invention, the hinge constraint includes a rib plate 201, a rib plate 202, a connecting pipe 203, a drip tray 204, a cover plate 205, a hinge shell 206, a retaining ring 207, a cold insulation block 208, a bottom plate 209 and The sealing plate 210, the connecting pipe is connected to the rib plate, the rib plate is provided with ribs, the drip tray is arranged between the connecting pipe and the cover plate, and a retaining ring, a cold insulation block and a sealing plate are arranged in the shell. Distributed at the ends of the inner and outer arm tubes see image 3 , which constrains all degrees of freedom of the pipe at this position except the rotation degree of freedom in the X direction, such as Figure 4 shown. At the same time, the hinge restraint has the design of drip tray and cold insulation block to minimize the transfer of cold energy.

Embodiment 3

[0028] see figure 1 , Figure 5 , Figure 5-1, as an improvement of the present invention, the planar constraints include a rib plate 191, a rib plate 192, a connecting pipe 193, a drip tray 194, a cover plate 195, a guide plate 196, and a thermal insulation pad 197, and the rib plate 191 is arranged on On the rib plate 192, the connecting pipe 193 is arranged between the drip tray 194 and the cover plate 195, and the outer surface of the guide plate is provided with a heat insulating plate, and the planar constraints are distributed at the ends of the inner arm pipe and the outer arm pipe, constraining the position of the pipe at this position Translation in the X direction, rotation degrees in the Y and Z directions, release the rotation degrees in the X direction and the translation degrees in the Y and Z directions at the same time, which can make the inner arm tube and the outer arm tube freely deformable. Such as Figure 5 shown. The confinement structure also has a...

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Abstract

The invention relates to a single pipe loading and unloading arm for a low-temperature ship. The single pipe loading and unloading arm comprises a supporting structure, a pipe system, a hydraulic drive system, a maintenance platform, a nitrogen gas blowing and sweeping system, an emergency escaping system, a hydraulic substation, an upper rope pulley, a steel wire rope and a lower rope wheel; the steel wire rope is arranged between the upper rope wheel and the lower rope wheel, the maintenance platform is arranged on the upper portion of the loading and unloading arm, the nitrogen gas blowing, sweeping and distributing system is arranged near an inlet flange of the loading and unloading arm, and the hydraulic substation is arranged on the side face of a stand column. The pipe system comprises a stand column pipe, an inner arm pipe and an outer arm pipe, the upper end and the lower end of the stand column pipe are constrained with a shaft, and it is guaranteed that the stand column pipe stretches out and contracts back freely in the axial direction and rotates freely in the axial direction; one end of the inner arm pipe is constrained with a hinge, and the other end of the inner arm pipe is constrained with a plane; one end of the outer arm pipe is constrained with a hinge, and the other end of the outer arm pipe is constrained with a plane. By means of the single pipe loading and unloading arm, the pipe system can stretch and contract freely under an environmental temperature as well as an ultra-low temperature working condition, and thus internal stress generated by temperature deformation is eliminated.

Description

technical field [0001] The invention relates to a loading and unloading arm, in particular to a low-temperature marine single-pipe loading and unloading arm, which belongs to the technical field of LNG marine loading and unloading equipment. Background technique [0002] The LNG ship loading and unloading arm is used to transport the ultra-low temperature liquid in the LNG tank ship on the wharf. The temperature of the transported liquid is extremely low, which leads to a large amount of shrinkage of the pipeline transporting the liquid on the LNG ship loading and unloading arm, and the structure supporting the pipeline for transporting the cryogenic liquid is located The temperature is the ambient temperature, resulting in a large temperature deformation difference between the support structure and the piping system due to the large temperature difference. When the marine loading and unloading arm is working (loading and unloading cryogenic liquid), the deformation is incon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B67D9/00
CPCB67D9/00B67D9/02
Inventor 黄立亚宋宪雷权小军孙学双
Owner 优必得流体科技设备(江苏)有限公司
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