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CN-121973902-A - Intelligent low-temperature-resistant collision buffer device suitable for LNG floating transmission system

CN121973902ACN 121973902 ACN121973902 ACN 121973902ACN-121973902-A

Abstract

The invention discloses an intelligent low-temperature-resistant collision buffer device suitable for an LNG floating transmission system, which relates to the technical field of safety protection of the LNG floating transmission system and comprises a composite buffer device, a shell and a bottom plate, wherein the composite buffer device is of a multi-layer composite structure, an outer rigid supporting layer, a middle energy absorption layer and an inner flexible contact layer are sequentially arranged from outside to inside, the outer rigid supporting layer, the middle energy absorption layer and the inner flexible contact layer are fixedly connected into a whole in a gluing or integral forming mode, the shell is coated on the outer sides of the composite buffer device and the inner mechanism and is fixedly connected with the bottom plate to form a protective shell, and the technical pain points of low-temperature failure, low energy absorption efficiency, poor gesture adaptation, no intelligent regulation and the like of the traditional buffer device in an LNG floating transmission scene are comprehensively solved, and the reliability, the suitability and the intelligent level of collision protection are remarkably improved.

Inventors

  • YANG JIANYE
  • HOU BOWEN
  • CHEN JINLONG
  • LU ZHAOKUAN
  • MAO YANDONG
  • DING LESHENG
  • ZHANG CONG
  • XU QI

Assignees

  • 大连理工大学宁波研究院

Dates

Publication Date
20260505
Application Date
20260318

Claims (8)

  1. 1. The utility model provides an intelligent low temperature resistant collision buffer device suitable for LNG floating transmission system, includes compound buffer device (1), shell (2) and bottom plate (3), its characterized in that, compound buffer device (1) is multilayer composite structure, has set gradually outer rigid support layer (13), middle energy-absorbing layer (12) and inlayer flexible contact layer (11) from outside to inside, outer rigid support layer (13), middle energy-absorbing layer (12) and inlayer flexible contact layer (11) are through gluing or integrated into one piece mode fixed connection, shell (2) cladding in compound buffer device (1) and inside mechanism outside, with bottom plate (3) fixed connection forms the protective housing; The inner mechanism comprises a servo executing mechanism (4) and a rigid supporting frame (5), the servo executing mechanism (4) is arranged between the composite buffering device (1) and the bottom plate (3), the servo executing mechanism (4) comprises three independently controlled servo driving units, two ends of each servo driving unit are respectively and movably connected with the composite buffering device (1) and the bottom plate (3) through universal connection structures, and the rigid supporting frame (5) is connected between the composite buffering device (1) and the bottom plate (3) through a multi-stage hinge structure; The compound buffer device (1) can dynamically attach the curved profile of the side wall of the LNG ship body by controlling the expansion and contraction amount of each servo driving unit in the servo executing mechanism (4), so that self-adaptive buffer is realized.
  2. 2. An intelligent low temperature collision buffer device suitable for an LNG floating transmission system according to claim 1, characterized in that the inner flexible contact layer (11) is made of a silicone rubber material with shore a hardness of 30-50, the contact surface facing the hull is provided with a honeycomb microstructure, and the aperture of the honeycomb microstructure is 0.5-1mm.
  3. 3. An intelligent low temperature impact buffer device suitable for LNG floating transfer systems according to claim 1, characterized in that the intermediate energy absorbing layer (12) is made of a modified polyurethane foam material with a density of 30-50kg/m3.
  4. 4. An intelligent low temperature collision buffer device suitable for an LNG floating transmission system according to claim 1, characterized in that the outer rigid support layer (13) is made of an aluminum alloy with a thickness of 5-10mm, and the surface of the outer rigid support layer is anodized.
  5. 5. An intelligent low temperature impact buffer device suitable for LNG floating transfer system according to claim 1, characterized in that three servo drive units are servo hydraulic cylinders (41) and are arranged in a triangular space.
  6. 6. The intelligent low-temperature-resistant collision buffer device suitable for the LNG floating transmission system according to claim 1, wherein the universal connection structure is a cross universal joint (42), the cross universal joint (42) is composed of a connecting seat (421) and a cross pin (422), the two connecting seats (421) are arranged in a 90-degree crossed symmetrical mode and are connected through the cross pin (422), and the connecting seat (421) can rotate around the cross pin (422).
  7. 7. The intelligent low-temperature-resistant collision buffer device suitable for an LNG floating transmission system according to claim 1, wherein the rigid support frame (5) comprises a buffer module connecting seat (51), a buffer module connecting pin shaft (52), a front support (53), a front support pin shaft and a rear support pin shaft (54), a rear support (55), a bottom plate connecting pin shaft (56) and a bottom plate connecting seat (57), the buffer module connecting seat (51) is welded on the end face of the composite buffer device (1), the side part of the buffer module connecting seat (51) is hinged with the front support (53) through the buffer module connecting pin shaft (52), the other end of the front support (53) far away from the buffer module connecting seat (51) is hinged with the rear support (55) through the front support pin shaft and the rear support pin shaft (54), the other end of the rear support (55) is hinged with the bottom plate connecting seat (57) through the bottom plate connecting pin shaft (56), and the bottom plate connecting seat (57) is welded with the inner side face of the bottom plate (3).
  8. 8. The intelligent low-temperature-resistant collision buffer device suitable for the LNG floating transmission system according to any one of claims 1 to 7, further comprising an intelligent control assembly, wherein the intelligent control assembly is composed of a sensing module, a control module and a driving module, the sensing module is integrated with a pressure sensor, a strain gauge and a temperature sensor and is used for collecting collision force, deformation quantity of the buffer device and environmental temperature data in real time, the control module is a PID controller, a built-in material performance parameter database is used for receiving the sensing module data and carrying out working condition judgment, parameter correction and control instruction generation, and the driving module is electrically connected with a servo executing mechanism (4) and is used for receiving the control module instruction, adjusting working parameters of a servo driving unit and realizing self-adaptive damping adjustment.

Description

Intelligent low-temperature-resistant collision buffer device suitable for LNG floating transmission system Technical Field The invention relates to the technical field of safety protection of liquefied natural gas floating transmission systems, in particular to an intelligent low-temperature-resistant collision buffer device suitable for an LNG floating transmission system. Background Liquefied Natural Gas (LNG) is used as clean and efficient energy, global trade scale of the LNG is continuously and rapidly expanded in recent years, and offshore floating transmission systems (such as a floating transfer platform, a floating production, storage and unloading device and dynamic connection transmission between LNG carriers) have the advantages of flexible deployment, adaptation to complex sea areas and the like, so that the LNG is a core solution for trans-regional transportation and reception of LNG. In the LNG floating transmission operation process, the floating platform and the LNG carrier are required to be in a dynamic berthing state for a long time, and the continuous action of factors such as stormy waves, tides, ocean currents and the like in the ocean environment can cause unavoidable relative movement between the floating platform and the LNG carrier, so that collision and impact are easy to cause. The conventional collision buffer devices (such as a common rubber fender, a fixed polyurethane buffer pad and the like) for berthing or protecting ships have exposed a plurality of serious defects under the application scene of LNG floating transmission, which is special low temperature, dynamic and high pressure, and are mainly characterized in the following aspects: Material performance fails in low temperature environments, where LNG storage and transport environments are extremely low in temperature, typically up to-162 ℃ and even lower. Under the extremely low temperature condition, the traditional rubber or common polyurethane material can be seriously hardened and embrittled, and the original high elasticity and flexibility of the traditional rubber or common polyurethane material are lost, so that the buffer device cannot effectively absorb and dissipate collision energy, and the basic protection function is lost. The energy absorption efficiency is low, the impact resistance is insufficient, the traditional buffer device adopts single material or simple laminated structure, and the design and material performance can only cope with gentle collision at lower speed (such as <0.5 m/s). However, in marine environments, a medium-high speed (0.5-2 m/s) relative shock may occur between the vessel and the platform, affected by sea waves, wind currents, etc. Under such impact, the existing device has the defects that the energy absorption efficiency is drastically reduced, the peak impact force cannot be effectively reduced, and the ship structure and the platform connection point are easily damaged. Therefore, a new collision buffer device that can adapt to ultra-low temperature environment and has high-efficiency intelligent energy absorption characteristics is needed in the art. Disclosure of Invention The invention aims to provide an intelligent low-temperature-resistant collision buffer device suitable for an LNG floating transmission system, so as to solve the problems of failure, low energy absorption efficiency and the like of a traditional buffer device in the prior art under a low-temperature environment. In order to achieve the aim, the intelligent low-temperature-resistant collision buffer device suitable for the LNG floating type transmission system comprises a composite buffer device, a shell and a bottom plate, wherein the composite buffer device is of a multi-layer composite structure, an outer rigid supporting layer, a middle energy absorption layer and an inner flexible contact layer are sequentially arranged from outside to inside, the outer rigid supporting layer, the middle energy absorption layer and the inner flexible contact layer are fixedly connected into a whole in a gluing or integral forming mode, and the shell is coated on the outer sides of the composite buffer device and the inner mechanism and is fixedly connected with the bottom plate to form a protective shell; the internal mechanism comprises a servo executing mechanism and a rigid supporting frame, the servo executing mechanism is arranged between the composite buffer device and the bottom plate, the servo executing mechanism comprises three servo driving units which are independently controlled, two ends of each servo driving unit are respectively and movably connected with the composite buffer device and the bottom plate through a universal connection structure, and the rigid supporting frame is connected between the composite buffer device and the bottom plate through a multi-stage hinge structure; The compound buffer device can dynamically attach to the curved profile of the side wall of the LNG ship body by cont