Large-diameter single-pile offshore floating transportation device and construction method thereof

Abstract

The invention relates to the technical field of offshore floating transportation, in particular to a large-diameter single-pile offshore floating transportation device which comprises a steel pile and a sealing cover arranged at the front end of the steel pile and used for sealing a front opening of the steel pile, and a blocking device used for blocking a rear opening of the steel pile is further arranged at the rear end of the steel pile. The blocking device comprises a curved-surface end socket body and an annular plate arranged on the edge of the end socket body, a clamping block which is driven by a piston assembly to swing at an angle is arranged on the convex surface of the end socket body, and the contact face of the clamping block and the steel pile is in a tooth shape. The sealing head type structure is plugged to the tail of the steel pile, the clamping blocks driven by the piston assembly and the inner wall of the steel pile are fixedly clamped, the plugging device is limited to be not disengaged from the tail of the steel pile, the clamping blocks with the tooth-shaped faces are tightly attached to the inner wall of the steel pile, the anti-disengagement safety is improved, and meanwhile the sealing effect is further improved through the external water pressure effect during transportation; the device is easy and convenient to manufacture, good in economical efficiency and good in application and popularization value.

Description

Technical Field

[0001] The invention relates to the technical field of offshore floating transportation, and in particular to a large-diameter single-pile offshore floating transportation device and a construction method thereof. Background Art

[0002] With the rapid development of offshore wind power, restrictions on grid-connected electricity prices are becoming increasingly stringent, requiring the overall development cost to be reduced. After years of practice, large-diameter steel piles have the best comprehensive economic efficiency, especially for wind turbine foundations with a water depth of less than 50m, and have been widely used. However, as the specifications of wind turbines continue to increase, the required diameter and length of steel piles have increased significantly, but steel piles are transported by special barges. Due to the limitations of ship resources and deck area, the transportation cost is very high. At the same time, the long loading time of barge transportation makes it difficult to compress the overall development cost. Therefore, in order to meet the needs of offshore wind power development, how to improve the transportation economy of single piles is an important issue that needs to be solved urgently. Summary of the invention

[0003] The object of the present invention is to provide a large-diameter single-pile offshore floating device and a construction method thereof.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention proposes a large-diameter single pile offshore floating device, comprising a steel pile and a cover arranged at the front end of the steel pile for sealing the front opening of the steel pile, and a plugging device for blocking the rear opening of the steel pile is also arranged at the rear end of the steel pile;

[0006] The blocking device includes a curved head body and a ring plate arranged on the edge of the head body. A clamping block that swings at a driving angle of the piston assembly is arranged on the convex surface of the head body, and the contact surface between the clamping block and the steel pile is toothed.

[0007] Furthermore, it also includes a ballast ton bag, which is placed at the rear end of the steel pile.

[0008] Furthermore, a sealing ring is provided on the side wall of the head body close to the ring plate.

[0009] Furthermore, the head body is provided with a plurality of through holes along the circumference of the central axis, a cylinder with a flange is nested and welded on the inner wall of the through hole, the flange of the cylinder and the flange blind plate are bolted and fixed, the piston assembly is arranged in the cylinder, and the telescopic end of the piston assembly is hinged to the clamping block.

[0010] Furthermore, a plurality of ribs are fixed on the outer wall of the cylinder, and the ribs are fixed on the convex surface of the head body.

[0011] Furthermore, a plurality of front hanging heads are arranged on the convex surface of the head body, and a plurality of rear hanging heads are arranged on the concave surface of the head body.

[0012] The present invention also includes a construction method for an offshore floating cloud device as described in any of the above, wherein a tugboat is used to tow the offshore floating device to a construction site, and after arriving at the construction site, the offshore floating device is moored on the side of a crane that has been in place, a steel wire rope is connected to the blocking device, and the crane of the crane lifts the front end of the steel pile, slowly lifting it to allow the tail of the steel pile to sink, and a diver operates the cover to open it, allowing seawater to enter the interior of the steel pile. When the steel pile is filled with seawater, the piston assembly retracts to release the fixation of the block, and the steel wire rope pulls the blocking device back to the construction ship, after which the steel pile is positioned and driven in, completing the offshore construction.

[0013] Compared with the prior art, a head-shaped structure is inserted into the tail of the steel pile, and a block driven by a piston assembly is fixedly clamped with the inner wall of the steel pile to prevent the sealing device from falling out of the tail of the steel pile. The block with a toothed surface is close to the inner wall of the steel pile to improve the safety of anti-falling off. At the same time, the external water pressure during transportation is conducive to further improving the sealing effect. The sealing device installed at the tail and the sealing cover at the front end of the steel pile form a watertight buoy with the steel pile to meet the needs of floating transportation at sea. There are also some ballast bags at the rear end of the steel pile to prevent the steel pile from twisting in the water during transportation, and at the same time lift the front end of the steel pile to reduce towing resistance. The present invention is simple and convenient to manufacture, has good economy, and has good promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of the present invention.

[0016] Figure 2 Schematic diagram of the blocking device from a concave perspective.

[0017] Figure 3 Schematic diagram of the blocking device from a convex perspective.

[0018] In the figure, 1-steel pile; 2-sealing cover; 3-blocking device; 31-sealing head body; 32-ring plate; 4-piston assembly; 5-block; 6-ballast bag; 7-sealing ring; 8-cylinder barrel; 9-flange blind plate; 10-rib plate; 11-front lifting head; 12-rear lifting head. DETAILED DESCRIPTION

[0019] The technical scheme of the present invention is further described below in conjunction with specific examples. It should be understood that the following examples are only exemplary descriptions and explanations of the present invention, and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included in the scope that the present invention is intended to protect.

[0020] In one embodiment of the present invention, a large-diameter single pile offshore floating device comprises a steel pile 1 and a cover 2 disposed at the front end of the steel pile 1 for sealing the front opening of the steel pile 1, and a plugging device 3 for blocking the rear opening of the steel pile 1 is further disposed at the rear end of the steel pile 1;

[0021] The blocking device 3 includes a curved head body 31 and a ring plate 32 arranged on the edge of the head body 31, and a clamping block 5 that swings at a driving angle of the piston assembly 4 is arranged on the convex surface of the head body 31, and the contact surface between the clamping block 5 and the steel pile 1 is toothed; the toothed contact surface of the clamping block 5 plays a better role in fixation and anti-slip; in actual application, the front opening of the steel pile 1 is sealed by the cover 2, and the rear opening is blocked by the blocking device 3, and the internal cavity of the steel pile 1 is sealed to meet the needs of offshore floating.

[0022] In one embodiment of the present invention, a ballast bag 6 is further included, and the ballast bag 6 is placed at the rear end of the steel pile 1. The steel pile 1 has a large space inside, and the whole set of piles will float on the water. In addition, due to the weight of the soil filled in the ballast bag 6, the front end of the steel pile 1 is tilted, which is beneficial to reduce towing resistance.

[0023] In one embodiment of the present invention, a sealing ring 7 is provided on the side wall of the sealing head body 31 close to the ring plate 32 to achieve fixed clamping and sealing with the steel pile 1 .

[0024] In one embodiment of the present invention, the head body 31 is provided with a plurality of through holes along the circumference of the central axis, a cylinder 8 with a flange is nested and welded on the inner wall of the through hole, the flange of the cylinder 8 and the flange blind plate 9 are bolted and fixed, the piston assembly 4 is arranged in the cylinder 8, and the telescopic end of the piston assembly 4 is hinged to the clamping block 5; after the blocking device 3 blocks the rear opening of the steel pile 1, the telescopic end of the piston assembly extends so that the clamping block 5 is close to the inner wall of the steel pile 1, thereby achieving fastening and stability.

[0025] In the above embodiment, a plurality of ribs 10 are fixed on the outer wall of the cylinder 8, and the ribs 10 are fixed on the convex surface of the head body 31 to improve the force safety.

[0026] In one embodiment of the present invention, a plurality of front hanging heads 11 are arranged on the convex surface of the head body 31, and a plurality of rear hanging heads 12 are arranged on the concave surface of the head body 31; the front hanging heads are used to pull from the inside of the steel pile 1 when the plugging device 3 is lifted and installed; and the rear hanging heads are used to pull when the plugging device 3 is recovered and removed.

[0027] In one embodiment of the present invention, pile hanging heads are provided on both sides of the exterior of the steel pile, and the pile hanging heads are used to facilitate pulling.

[0028] The present invention also includes a construction method for an offshore floating cloud device as described in any of the above, wherein a tugboat is used to tow the offshore floating device to a construction site, and after arriving at the construction site, the offshore floating device is moored on the side of a crane that has been in place, a steel wire rope is connected to the blocking device, and the crane of the crane lifts the front end of the steel pile, slowly lifting it to allow the tail of the steel pile to sink, and a diver operates the cover to open it, allowing seawater to enter the interior of the steel pile. When the steel pile is filled with seawater, the piston assembly retracts to release the fixation of the block, and the steel wire rope pulls the blocking device back to the construction ship, after which the steel pile is positioned and driven in, completing the offshore construction.

[0029] In practical application, the present invention is towed and towed by a tugboat, and the towing cable is connected to the pile heads on both sides to control the towing speed. At the same time, a small port tug assists at the rear, and controls the change of the towing direction of the steel pile by pushing on both sides, and tows it to the construction site. After arriving at the construction site, the present invention is moored on the side of the crane that has been in place, the towing cable is released, and the wire rope is connected to the rear lifting point. The crane hook of the crane is hooked to the pile head, and the tail of the steel pile is slowly lifted to sink. The diver operates the cover to open, and seawater enters the inside of the steel pile. When the steel pile is basically filled, the piston assembly is operated to retract to release the fixation of the block. Due to the lifted steel pile, the ballast bag slides toward the rear end, so that the plugging device is pushed out of the tail end of the steel pile after the piston assembly retracts. The wire rope pulls the plugging device back to the construction ship. After all the ballast bags are unloaded, the diver goes into the water to open the bag opening to let the soil in the bag flow out, and the ballast bag is recovered. After that, the steel pile is positioned and driven in to complete the offshore construction.

[0030] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Any modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A large diameter single pile offshore floating device, characterized in that: It comprises a steel pile and a cover arranged at the front end of the steel pile for sealing the front opening of the steel pile, and the rear end of the steel pile is also provided with a blocking device for blocking the rear opening of the steel pile; The blocking device includes a curved head body and a ring plate arranged on the edge of the head body. A clamping block that swings at a driving angle of the piston assembly is arranged on the convex surface of the head body, and the contact surface between the clamping block and the steel pile is toothed.

2. A large diameter single pile offshore floating device according to claim 1, characterized in that: It also includes a ballast bag, which is placed at the rear end of the steel pile.

3. A large diameter single pile offshore floating device according to claim 1, characterized in that: A sealing ring is arranged on the side wall of the head body close to the ring plate.

4. A large diameter single pile offshore floating device according to claim 1, characterized in that: The head body is provided with a plurality of through holes along the circumference of the central axis, a cylinder with a flange is nested and welded on the inner wall of the through hole, the flange of the cylinder and the flange blind plate are bolted and fixed, the piston assembly is arranged in the cylinder, and the telescopic end of the piston assembly is hinged to the clamping block.

5. A large diameter single pile offshore floating device according to claim 4, characterized in that: A plurality of ribs are fixed on the outer wall of the cylinder, and the ribs are fixed on the convex surface of the head body.

6. A large diameter single pile offshore floating device according to claim 1, characterized in that: A plurality of front hanging heads are arranged on the convex surface of the head body, and a plurality of rear hanging heads are arranged on the concave surface of the head body.

7. The present invention also includes a construction method of the offshore floating cloud device according to any one of claims 1 to 6, characterized in that: A tugboat is used to tow the offshore floating device to the construction site. After arriving at the construction site, the offshore floating device is moored on the side of the crane that has been in place, and a steel wire rope is connected to the blocking device. The crane of the crane lifts the front end of the steel pile and slowly lifts it to sink the tail of the steel pile. The diver operates the cover to open it, and seawater enters the steel pile. When the steel pile is filled with seawater, the piston assembly retracts to release the fixation of the block, and the steel wire rope pulls the blocking device back to the construction ship. After that, the steel pile is positioned and driven in to complete the offshore construction.

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