CN112693574B

CN112693574B - Deck butt joint unit buffer based on non-Newtonian fluid

Info

Publication number: CN112693574B
Application number: CN202110080959.0A
Authority: CN
Inventors: 俞嘉臻; 郭孝先; 肖峰; 李欣; 刘楠; 李巍; 付振秋
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2022-05-17
Anticipated expiration: 2041-01-21
Also published as: CN112693574A

Abstract

The invention discloses a deck butt joint unit buffer device based on non-Newtonian fluid, which relates to the field of ship and ocean engineering and comprises an outer sleeve, a fluid cylinder, a conical receiver, a piston disc, a piston shaft, a vertical spring and transverse buffer rubber, wherein the fluid cylinder, the conical receiver, the piston shaft and the transverse buffer rubber are positioned in the outer sleeve, the vertical spring is connected with the bottom of the inner side of the fluid cylinder, the piston disc is positioned in the inner side of the fluid cylinder, and the piston disc is in contact with the vertical spring and is acted by an upward force when being pressed. In the process of floating, supporting and dismantling the platform, the invention can obviously reduce the collision between steel and steel between structures, and can ensure that the upper module block has good buffering capacity when being impacted greatly. The invention has the advantages of clear function, clear positioning, simple structure and easy realization, greatly improves the dismantling efficiency and the floating support dismantling precision, and reduces the risk of offshore operation.

Description

Deck butt joint unit buffer based on non-Newtonian fluid

Technical Field

The invention relates to the field of ship and ocean engineering, in particular to a deck docking unit buffer device based on non-Newtonian fluid.

Background

Due to the fact that the marine environment is severe, the process of dismantling the upper-layer blocks of the waste ocean platforms through the floating support is complex, risk factors are multiple, and safety requirements are high. Influenced by sea conditions, and under the condition that the ship is unstable, steel-to-steel collision is easy to generate between structures in the marine dismantling process.

In the process of floating and supporting the platform, the butt joint and load transfer between the upper block and the deck butt joint unit are key steps, and the difficulty of the whole process is also the difficulty. During the process of docking the barge and carrying the load of the upper chunk, the barge is continuously subjected to the action of the external environment load, simultaneously, the self weight of the barge is continuously changed due to the adjustment of the ballast water, the series of changed loads are transmitted to the upper chunk of the ocean platform through the docking unit on the deck, and the coupled motion of the two forms a complex motion system. Therefore, there is a need for a deck docking unit arrangement with better cushioning properties to cushion the impact between the barge and the upper block during the floatover process.

Accordingly, those skilled in the art have endeavored to develop a cushioning device for deck docking units during the buoyant lift removal of a module of formations on an offshore platform.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention provides a buffer device for deck docking unit based on non-newtonian fluid and suitable for floating platform.

In order to achieve the purpose, the invention provides a deck butt joint unit buffer device based on non-Newtonian fluid, which is characterized by comprising an outer sleeve, a fluid cylinder, a conical receiver, a piston disc, a piston shaft, a vertical spring and transverse buffer rubber, wherein the fluid cylinder, the conical receiver, the piston shaft and the transverse buffer rubber are positioned inside the outer sleeve, the conical receiver is connected with the piston shaft, the piston disc is connected with the piston shaft, the vertical spring is connected with the bottom of the inner side of the fluid cylinder, the piston disc is positioned inside the fluid cylinder, and the piston disc is in contact with the vertical spring and is acted upwards when being pressed.

Further, the conical receiver is provided with a conical groove, the conical groove and the conical insertion tip of the upper block meet geometric similarity, and guiding butt joint and geometric constraint of the conical insertion tip in the floating-supporting platform dismounting process are achieved.

Further, the lateral buffer rubber is fixed outside the cone-shaped receiver and is in contact with the outer sleeve, and lateral buffer force is provided by changing the expansion and contraction amount of the rubber in the lateral direction.

Further, horizontal cushion rubber comprises rubber and 3 balls, there are 12 in the deck butt joint unit buffer horizontal cushion rubber, the contained angle between the horizontal cushion rubber is 30.

Furthermore, the deck docking unit buffer device further comprises an upper buffer rubber and a bottom buffer rubber, the top of the outer side of the fluid cylinder is connected with the upper buffer rubber, and the bottom of the outer side of the fluid cylinder is connected with the bottom buffer rubber.

Further, the interior of the fluid cylinder is filled with non-Newtonian fluid, the fluid cylinder is a cylindrical container with an opening at the top, and the piston shaft penetrates through the upper buffer rubber and the opening at the top of the fluid cylinder.

Further, the outer sleeve is welded on a supporting leg of the deck and used as a support of the deck butt joint unit buffer device.

Further, the deck docking unit buffer device is entirely located on the outboard side of the ship board.

Further, the piston disc is divided into three layers of discs, 6 round holes with the same size are uniformly distributed on the disc close to the piston shaft, 6 round holes with the same size are uniformly distributed on the edge of the disc close to the disc, and a supporting member is arranged between the discs.

Further, the cone-shaped receiver, the piston shaft, and the piston disc are made of metallic iron.

In a preferred embodiment of the invention, the deck docking unit is welded to the support legs on the deck during the actual floating-in and floating-out of the platform, and is located entirely outside the side of the vessel for facilitating docking with the upper module of the platform. The tapered receiver is provided with a conical groove, the butt joint part of the upper module can enter the interior of the deck butt joint unit under the guidance of the conical groove, the radius of the conical groove is called as the catching radius of the deck butt joint unit, and the upper module butt joint part needs to be ensured to move within the catching radius of the deck butt joint unit in the process of floating, supporting and detaching the platform so as to ensure that the two parts are smoothly butted; the fluid cylinder and the buffer rubber are mainly used for buffering the collision between the barge and the upper block, so that the steel-to-steel contact is avoided, and the barge softly receives the upper block.

According to the deck docking unit buffer device based on the non-Newtonian fluid, the characteristic that the shear stress and the shear strain rate of the non-Newtonian fluid are not in a linear relation is applied to the deck docking unit buffer device in the process of floating, supporting and detaching the platform, so that the collision between a barge and an upper chunk can be remarkably reduced, and the influence on the structure of the platform is reduced. The device simple structure, the function is clear and definite, can make upper portion chunk have fine buffer capacity when receiving great impact, can be when demolising the platform barge butt joint with accept upper portion chunk in-process, prevent the collision of steel to the steel between the structure, improve greatly and demolish efficiency and float and hold in the palm and demolish the precision.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic cross-sectional view of a non-Newtonian fluid based deck docking unit damping device in accordance with a preferred embodiment of the present invention;

FIG. 2 is an oblique view of the structure of a non-Newtonian fluid based deck docking unit damping device in accordance with a preferred embodiment of the present invention;

fig. 3 is a schematic view of the internal piston of a non-newtonian fluid based deck docking unit damping device according to a preferred embodiment of the present invention.

Wherein, 1-outer sleeve, 2-conical receiver, 3-transverse buffer rubber, 4-piston shaft, 5-piston disc, 6-upper buffer rubber, 7-bottom buffer rubber, 8-fluid cylinder, 9-non-Newtonian fluid, 10-vertical spring.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

The invention aims at the floating and supporting dismantling of a block on the upper part of an ocean platform, and aims to provide a deck butt joint unit buffer device which can obviously reduce the collision between steel and steel between structures. The butt joint part of the device adopts a cone groove which is similar to the conical insertion tip of the upper module block in geometry.

As shown in fig. 1, 2 and 3, the outer sleeve 1 is the basis of the whole arrangement, which is connected to the deck and at the same time is the support of the whole docking unit arrangement; the conical receiver 2 is positioned in the outer sleeve 1 and is connected with the transverse buffer rubber 3 and the piston shaft 4; the top and the bottom of the outer side of the fluid cylinder 8 are respectively connected with an upper buffer rubber 6 and a bottom buffer rubber 7; the non-Newtonian fluid 9 is filled in the fluid cylinder 8; the piston shaft 4 is fixedly connected with the conical receiver 2 and the piston disc 5 and penetrates through the top center of the fluid cylinder 8.

The conical receiver 2 is made of metallic iron of sufficient strength and has a geometry similar to the conical spigot of the upper block mounting.

The transverse buffer rubber 3 is connected with the conical receiver 2, a certain gap is reserved between the transverse buffer rubber and the outer sleeve 1, vertical movement of the receiver is facilitated, when transverse force is applied, the transverse buffer rubber 3 is in contact with the outer sleeve 1, and transverse buffer force is provided by changing rubber deformation; the number of the transverse buffer rubbers 3 is 12, and the transverse buffer rubbers are distributed at an included angle of 30 degrees outside the conical receiver 2.

The piston shaft 4 is made of metal iron with enough strength and is fixedly connected with the conical receiver 2 and the piston disc 5. The piston disc 5 is made of metal iron with enough strength and is divided into three layers of discs, 6 round holes with the same size are uniformly distributed at the position, close to the piston shaft 4, of each disc, 6 round holes with the same size are uniformly distributed at the position, close to the edge of each disc, and each disc is connected through a supporting component with certain strength.

The upper cushion rubber 6 is located on the top outside the fluid cylinder 8 and serves to cushion the collision between the cone-shaped receiver 2 and the fluid cylinder 8 when pressurized. The bottom cushion rubber 7 is connected with the outer side bottom of the outer sleeve 1 and the fluid cylinder 8. The fluid cylinder 8 is a cylindrical container with an opening at the top, the piston shaft 4 moves vertically through the opening, and the non-Newtonian fluid 9 is positioned in the fluid cylinder 8 and generates vertical force when the piston disc 5 moves. A vertical spring 10 is located at the bottom inside the fluid cartridge 8 to provide additional upward damping force as the piston disc 4 moves downward.

In the floating support dismantling process, the conical receiver 2 guides the conical insertion tip to be butted and geometrically constrained, the movement of the upper block drives the conical insertion tip to move, the movement of the conical insertion tip causes the movement of the conical receiver 2, the movement of the conical receiver 2 causes the up-and-down movement of the piston shaft 4 and the deformation of the transverse buffer rubber 3, and the movement of the piston shaft 4 causes the piston disc 5 to move in the non-Newtonian fluid, so that transverse and longitudinal forces are generated to constrain the movement of the upper block.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection determined by the claims.

Claims

1. A deck docking unit buffer device based on non-Newtonian fluid is characterized by comprising an outer sleeve, a fluid cylinder, a conical receiver, a piston disc, a piston shaft, a vertical spring, a transverse buffer rubber, an upper buffer rubber and a bottom buffer rubber, wherein the fluid cylinder, the conical receiver, the piston shaft and the transverse buffer rubber are positioned inside the outer sleeve, the conical receiver is connected with the piston shaft, the piston disc is connected with the piston shaft, the vertical spring is connected with the bottom of the inner side of the fluid cylinder, the piston disc is positioned inside the fluid cylinder, and the piston disc is in contact with the vertical spring and is acted by an upward force when being pressed; the top of the outer side of the fluid cylinder is connected with the upper buffer rubber, and the bottom of the outer side of the fluid cylinder is connected with the bottom buffer rubber; the fluid cylinder is a cylindrical container with an opening at the top, the interior of the fluid cylinder is filled with non-Newtonian fluid, the piston shaft penetrates through the upper buffer rubber and the opening at the top of the fluid cylinder, and the movement of the piston shaft drives the piston disc to move in the non-Newtonian fluid to generate transverse force and longitudinal force to restrict the movement of the upper block; the transverse buffer rubber is fixed on the outer side of the conical receiver and is in contact with the outer sleeve when the conical receiver is subjected to transverse force, and the transverse buffer force is provided by changing the transverse expansion and contraction amount of the rubber.

2. A non-newtonian fluid based deck docking unit bumper as recited in claim 1, wherein the tapered receiver has a conical recess that is geometrically similar to the tapered insertion tip of the upper block for guided docking and geometric constraint of the tapered insertion tip during floatover of the platform.

3. The non-Newtonian fluid based deck docking unit damping device of claim 1, wherein the lateral damping rubber is composed of rubber and 3 balls, 12 lateral damping rubbers are provided in the deck docking unit damping device, and an included angle between the lateral damping rubbers is 30 °.

4. A non-newtonian fluid based deck docking unit fender according to claim 1, wherein the outer sleeve is welded to deck support feet to provide support for the deck docking unit fender.

5. A non-newtonian fluid based deck docking unit fender according to claim 1 wherein the deck docking unit fender is located entirely outboard of the ship board.

6. A non-newtonian fluid based deck docking unit fender as in claim 1 wherein said piston disc is divided into three layers of circular discs, said discs having 6 equally sized circular holes spaced about said piston axis, 6 equally sized circular holes spaced about said disc edges, and support members disposed between said discs.

7. A non-newtonian fluid based deck docking unit bumper as defined in claim 1, wherein the tapered receiver, the piston shaft and the piston disc are made of metallic iron.