CN114715346A - Detachable anti-ice device suitable for floating ocean platform - Google Patents

Abstract

The invention provides a detachable anti-icing device suitable for a floating ocean platform. The ice breaking mechanism is arranged on the bent plate main body, and the bent plate main body position adjusting device is connected with the bent plate main body and used for adjusting the height of the bent plate main body and changing the contact position of the bent plate and sea ice so as to ensure that the bent plate has a proper cone angle and reduce the influence of ice load to the maximum extent. The invention can improve the ice resistance of the platform during the ice-freezing period, prevent the platform from being damaged by ice load during offshore operation, and ensure the platform to work normally under the action of wave load during the ice-free period. The invention is detachable and flexible to use, avoids direct contact between sea ice and a structure, and is beneficial to ice resistance.

Description

Detachable anti-ice device suitable for floating ocean platform

Technical Field

The invention relates to the field of ocean engineering, in particular to a detachable anti-ice device suitable for a floating ocean platform.

Background

The arctic is a key point of high attention of various oceans in the strong countries because the arctic has huge oil and gas resources. In order to develop oil and gas resources in arctic sea areas, various countries have begun to research equipment for polar exploration and transportation, including semi-submersible platforms, cylindrical ocean platforms, Floating Production Storage and Offloading (FPSO), and drill ships, etc., wherein the semi-submersible platforms are considered to be one of the equipments well suited for offshore operations through optimized design into arctic sea areas. The current semi-submersible type ocean platform capable of carrying out offshore operation in arctic sea areas is still in a research stage, and the related technical problem is not overcome. An offshore structure operating in the arctic sea area needs to take into consideration the influence of ice load. Semi-submersible platforms must have ice resistance to minimize the impact of ice loads on the structure. Currently, most common anti-ice devices mostly adopt a structure with a cone or an inclined plane, and the cone and the inclined plane structure can convert the damage mode of sea ice from crushing to bending damage, so that the local ice force and the overall ice force borne by the structure can be greatly reduced. The anti-ice cone is added on the stand column, and the semi-submersible ocean platform can have anti-ice performance by adopting the novel stand column in a downward straight and upward inclined mode. However, it has the disadvantage that changing the shape of the columns will inevitably affect the waterplane area of the structure and thus the movement of the platform under wave load. Meanwhile, the device cannot be disassembled, so that the device is inconvenient to operate and maintain.

Disclosure of Invention

Semi-submersible platforms for offshore operations in arctic waters need to be equipped with anti-icing devices, otherwise it is difficult to exploit resources in ice zones. In order to improve the ice-resistance of the platform and not influence the influence of wave load on the platform in the ice-free period, a detachable ice-resistance device suitable for a floating ocean platform is provided. The technical means adopted by the invention are as follows:

the utility model provides an anti ice device of detachable type suitable for floating ocean platform, includes bent plate main part, bent plate main part position control device and opens ice mechanism, it sets up in the bent plate main part to open ice mechanism, bent plate main part position control device links to each other with the bent plate main part, and it is used for adjusting the height of bent plate main part, changes the bent plate and has the influence that suitable cone angle furthest reduced ice load with the position of sea ice contact.

Further, the bent plate main body position adjusting device comprises a pulley system and a chain, the pulley system is installed on the floating ocean platform, and the chain is connected above the bent plate main body after bypassing the pulleys.

Furthermore, the main body of the curved plate is of a structure with a wide upper part and a narrow lower part, namely the arc length above the main body of the curved plate is greater than that below the main body of the curved plate, and the curved plate is in smooth transition from top to bottom.

Further, the ice breaking mechanism comprises sharp corners of a plurality of cones arranged on the curved plate main body, the sharp corners of the cones face to the outside, and the cones are radially arranged around the outer edge of the curved plate near a waterline.

Further, the floating ocean platform comprises an upper deck, a column and a buoy, and the curved plate body is wrapped around the column in a contour mode while keeping a certain interval.

Furthermore, the bottom of the bent plate main body is limited at the bottommost end through a groove in the buoy.

Further, the groove comprises two steel plates arranged side by side.

The invention can improve the ice resistance of the platform during the ice-freezing period, prevent the platform from being damaged by ice load during offshore operation, and ensure the platform to work normally under the action of wave load during the ice-free period. The invention is detachable and flexible to use, the design of the curved surface with the wide upper part and the narrow lower part can convert the extrusion damage between the sea ice and the vertical structure into bending damage, and the curved plate separates the sea ice from the vertical column, thereby avoiding the direct contact between the sea ice and a structural object and being beneficial to ice resistance. The reverse taper design near the waterline face reduces the impact of ice loading while preventing the build-up of crushed ice. The sharp corners covered on the outer surface and facing outwards can break large sea ice, so that the high-pressure area is avoided. The anti-ice device lower part is placed in the recess of flotation pontoon, plays fixed effect, prevents that the lower part of device and stand from bumping under the impact of sea ice. The upper part of the anti-icing device is connected to the deck through a pulley and a chain, so that the position of the whole device in contact with sea ice can be adjusted at any time, and the optimal anti-icing angle can be found.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a schematic view of the pulley connection of the present invention.

FIG. 4 is a schematic view of the main body of the curved plate of the present invention.

FIG. 5 is a schematic diagram of a groove structure according to the present invention.

In the figure: 1. a pulley system; 2. a chain connecting the anti-icing device with the upper deck; 3. a curved plate with a narrow top and a wide bottom; 4. a sharp corner for breaking ice; 5. and the groove is arranged on the buoy.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the present invention discloses a detachable anti-ice device for a floating ocean platform, the floating ocean platform comprises an upper deck, columns and buoys, each column is protected by the anti-ice device, only one of which is shown in the figure and is used during icing. The ice breaking mechanism is arranged on the bent plate main body, and the bent plate main body position adjusting device is connected with the bent plate main body and used for adjusting the height of the bent plate main body and changing the contact position of the bent plate and sea ice so as to ensure that the bent plate has a proper cone angle and reduce the influence of ice load to the maximum extent.

The device for adjusting the position of the curved plate main body comprises a pulley system and a chain, wherein the pulley system is installed on the floating ocean platform, and the chain is connected above the curved plate main body after passing around the pulley. In this embodiment the anti-icing device is connected to the upper deck by 4 chains, which have a sufficient length to be stretched by means of a pulley system. The arrangement of the pulley system and the chain is shown in fig. 3 (only two pulley systems and chains are shown). As shown in fig. 5, the bottom of the curved plate main body is limited at the bottommost end by a groove on the float. The groove comprises two steel plates which are arranged side by side, so that the bent plate can be prevented from floating around to play a role in protection, the contact between the lower part of the device and the stand column can be avoided, and the damage caused by continuous collision can be avoided.

When the invention is used, the lower part is fixed by the groove; the upper part utilizes a pulley and a chain to increase flexibility and adjust the angle.

The anti ice performance of back taper will be superior to positive awl, and the back taper design can avoid the phenomenon of piling up of garrulous ice, so be preferred embodiment, the bent plate design is wide about the narrow structure is guaranteed near the waterline to demonstrate the form of class back taper, promptly the arc length of bent plate main part top is greater than the arc length of below, and the bent plate is from last to smooth transition down. The profile of bent plate main part is wrapping up the stand, keeps certain interval simultaneously, has avoided anti ice device to move to the inboard phenomenon of bumping with the stand under the sea ice effect.

In this embodiment, the ice breaking mechanism includes the closed angle of a plurality of cones that set up on the bent plate main part, and the closed angle of cone is towards the outside, and near waterline cone is radially arranged around the bent plate outward flange. The sharp angle of the cone faces to the outside, so that the impact of the massive ice can be eliminated to a certain degree. The design can prevent the high-pressure area generated in the action of sea ice and the structure and reduce the influence of ice load and structure vibration. Considering the variation of tidal differences, the cones are radially arranged around the outer edge of the curved plate near the waterline, and the details of the curved plate and sharp corners are shown in FIG. 4.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A detachable anti-icing device for a floating offshore platform, comprising: the ice breaking mechanism is arranged on the curved plate main body, and the curved plate main body position adjusting device is connected with the curved plate main body and used for adjusting the height of the curved plate main body and changing the contact position of the curved plate and sea ice so as to ensure that the curved plate has a proper cone angle and reduce the influence of ice load to the maximum extent.

2. The detachable ice-fighting unit adapted for use on a floating vessel according to claim 1, wherein said curved plate body position adjustment means comprises a pulley system mounted on the floating vessel and a chain connected over the curved plate body after passing around the pulley.

3. The removable ice-fighting unit of claim 1, wherein the curved plate body is a structure with a wide top and a narrow bottom, i.e. the arc length above the curved plate body is greater than the arc length below the curved plate body, and the curved plate smoothly transitions from top to bottom.

4. A demountable anti-icing assembly adapted for use on a floating offshore platform according to claim 1 or claim 3, wherein the ice breaking means comprises a plurality of tapering points of a cone disposed on the curved plate body, the tapering points of the cone facing outwardly, the cone being disposed radially around the outer edge of the curved plate near the waterline.

5. The detachable ice worthy structure for a floating vessel as claimed in claim 1, wherein the floating vessel comprises an upper deck, columns and pontoons, and the curved plate body is contoured to wrap around the columns while maintaining a spacing.

6. The removable ice-worthy apparatus for a floating vessel as claimed in claim 1, wherein the bottom of the curved plate body is limited at its bottom end by a groove on the pontoon.

7. The removable ice-worthy device adapted for use on a floating offshore platform, according to claim 6, wherein the recess comprises two steel plates arranged side by side.

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