Load-adjustable horseshoe-shaped limiting device for deepwater dynamic submarine cable laying

Abstract

The invention relates to the technical field of limiting devices, in particular to a deepwater dynamic submarine cable laying load-adjustable horseshoe-shaped limiting device which comprises a limiting device body, the limiting device body is used for counteracting buoyancy of a floater, the limiting device body comprises a basic balance weight and a plurality of load-adjusting balance weight pieces, and the load-adjusting balance weight pieces are detachably installed on the basic balance weight. The gravity of the limiting device is changed; a plurality of limiting columns are fixedly arranged on the basic counterweight; a connecting piece is fixedly arranged at the top of the limiting column; a through hole is formed in the connecting sheet; a first horseshoe opening is formed in the basic counterweight; a plurality of limiting holes are formed in the load adjusting weight stack; according to the invention, the weight of the limiting device is changed by arranging the load adjusting weight stacks which can be increased or decreased randomly, so that the buoyancy of the floater is balanced. By applying the load-adjustable horseshoe-shaped limiting device, the load can be adjusted according to the sinking force required by the installation of different pipes and cables, the load-adjustable horseshoe-shaped limiting device can be repeatedly used in different projects, and the cost is saved.

Description

Technical Field

[0001] This invention relates to the field of limiting device technology, and in particular to an adjustable horseshoe-shaped limiting device for deep-water dynamic submarine cable laying. Background Technology

[0002] Dynamic submarine cables are large pipelines integrating various units, including copper conductors, optical fibers, inner and outer sheaths, and fillers. They are indispensable and crucial equipment in the offshore oil and gas industry, widely used due to their complex composition and powerful functions. As China's offshore oil development continues to move into deeper waters, dynamic submarine cables have significant advantages in deep-water oil and gas extraction. Their high reliability and stability have led to their increasingly widespread application, and the key step in laying deep-water dynamic submarine cables is cable installation.

[0003] When laying dynamic submarine cables, floats must be installed on the cables to keep them suspended. After a certain number of floats are installed, the cable laying and lowering is paused, and a crane lowers a limiting device into the water. After an underwater robot connects the limiting device to the cable, the installation and lowering of floats continues. Without a limiting device to counteract the buoyancy of the floats, the cable will be difficult to keep stable, causing the section of the dynamic submarine cable with floats to bend excessively or even be damaged.

[0004] Because traditional limit devices have fixed weight and configuration, they can only be used in some projects and have a low reuse rate, resulting in high costs. This cost issue becomes even more prominent when limit devices are used extensively. Summary of the Invention

[0005] The main objective of this invention is to provide an adjustable horseshoe-shaped limiting device for deep-water dynamic submarine cable laying, in order to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of the present invention, an adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying is provided, comprising a limiting device for counteracting the buoyancy of a float, the limiting device comprising a base counterweight and a plurality of adjustable load counterweight plates, the adjustable load counterweight plates being detachably mounted on the base counterweight for changing the gravity of the limiting device.

[0007] Furthermore, a number of limiting posts are fixedly provided on the basic counterweight.

[0008] Furthermore, a connecting piece is fixedly provided at the top of the limiting post.

[0009] Furthermore, the connecting piece is provided with a through hole.

[0010] Furthermore, the basic counterweight is provided with a first horseshoe-shaped notch.

[0011] Furthermore, the load-adjusting counterweight plate is provided with several limiting holes.

[0012] Furthermore, several lifting rings are fixedly provided on the load-adjusting counterweight plate.

[0013] Furthermore, the load-adjusting counterweight plate is provided with a second horseshoe-shaped notch.

[0014] Furthermore, the basic counterweight and the adjustment counterweight have the same orthographic projection shape.

[0015] Furthermore, the first hoof-shaped opening and the second hoof-shaped opening have the same shape.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention balances the buoyancy of the float by incorporating adjustable counterweights that can be added or removed at will, thereby altering the weight of the limiting device. This adjustable horseshoe-shaped limiting device allows for load adjustment based on the sinking force required for different cable installations, and can be reused in various projects, saving costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the basic counterweight of the present invention; Figure 2 This is a schematic diagram of the load-adjusting counterweight structure of the present invention; Figure 3 This is a schematic diagram of the underwater installation limiting device of the present invention; Figure 4 This is a schematic diagram of the positioning of the limiting device of the present invention.

[0018] Figure label: 1. Basic counterweight; 11. Limiting post; 12. Connecting piece; 13. Through hole; 14. First horseshoe joint; 2. Adjustable counterweight piece; 21. Limiting hole; 22. Lifting ring; 23. Second horseshoe joint; 3. Float; 4. Crane; 5. Limiting device; 6. Underwater robot; 7. Submarine cable; 8. Clamp; 9. Sling. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] This embodiment provides an adjustable-load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying, such as... Figure 1 As shown, it includes a limiting device 5, which is used to counteract the buoyancy of the float 3. The limiting device 5 includes a base counterweight 1 and several adjustable counterweight plates 2. The adjustable counterweight plates 2 are detachably installed on the base counterweight 1 to change the gravity of the limiting device 5.

[0021] Several limiting posts 11 are fixedly provided on the basic counterweight 1.

[0022] A connecting piece 12 is fixedly provided on the top of the limiting post 11.

[0023] The connecting piece 12 has a through hole 13.

[0024] The basic counterweight 1 is provided with a first horseshoe-shaped opening 14.

[0025] like Figure 2 As shown, the load-adjusting counterweight 2 is provided with several limiting holes 21. The number and position of the limiting holes 21 correspond to the limiting post 11. By fitting the limiting holes 21 onto the limiting post 11, the load-adjusting counterweight 2 is installed on the base counterweight 1. Up to 10 load-adjusting counterweights 2 can be added, thereby changing the weight of the limiting device 5.

[0026] Several lifting rings 22 are fixedly installed on the adjustable counterweight plate 2. The lifting rope passes through the lifting rings 22, and the crane 4 lifts the lifting rope to lift the adjustable counterweight plate 2 and install it on the foundation counterweight 1, or remove it from the foundation counterweight 1.

[0027] The counterweight plate 2 is provided with a second horseshoe-shaped notch 23.

[0028] The basic counterweight 1 and the adjustment counterweight 2 have the same orthographic projection shape.

[0029] The first hoof-shaped opening 14 and the second hoof-shaped opening 23 have the same shape.

[0030] like Figure 4 As shown, the limiting device 5 and the submarine cable 7 can be connected in any of the following ways: the first way is to install a rigging on the through hole 13 and connect it to the clamp 8 on the submarine cable 7 through the rigging; the second way is to directly connect it to the sling 9 tied to the submarine cable 7 through the rigging.

[0031] The laying of the submarine cable 7 dynamic section begins, with the installation of floats 3. Based on calculation and analysis results, laying is paused after a certain number of floats 3 are installed. According to the calculated buoyancy of the floats 3, the foundation counterweight 1 is adjusted, and corresponding adjustment counterweight plates 2 are added. For example... Figure 3 As shown, the crane 4 of the construction vessel lowers the limiting device 5 into the water, and the underwater robot 6 connects the limiting device 5 to the submarine cable 7, and then removes the crane 4. After installation, the sinking force of the limiting device 5 counteracts the buoyancy of the float 3, keeping it in a relatively stable state to facilitate the subsequent laying of the submarine cable 7. After the laying of the float 3 section and the placement of the submarine cable 7 are completed, the crane 4 retrieves the limiting device 5 to the deck.

[0032] By setting adjustable counterweights 2 that can be added or removed at will, the weight of the limiting device 5 is changed to balance the buoyancy of the float 3. The application of this adjustable horseshoe-shaped limiting device allows for load adjustment according to the sinking force required for different cable installations, and it can be reused in different projects, saving costs.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A horseshoe-shaped adjustable restraint device for deep-water dynamic submarine cable laying, characterized in that, Includes a limiting device (5) for counteracting the buoyancy of the float (3). The limiting device (5) includes a base counterweight (1) and several adjustable counterweight plates (2). The adjustable counterweight plates (2) are detachably installed on the base counterweight (1) to change the gravity of the limiting device (5).

2. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 1, characterized in that, Several limiting posts (11) are fixedly provided on the basic counterweight (1).

3. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 2, characterized in that, The top of the limiting post (11) is fixedly provided with a connecting piece (12).

4. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 3, characterized in that, The connecting piece (12) is provided with a through hole (13).

5. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 1, characterized in that, The basic counterweight (1) is provided with a first horseshoe-shaped opening (14).

6. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 1, characterized in that, The load-adjusting counterweight plate (2) is provided with several limiting holes (21).

7. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 1, characterized in that, Several lifting rings (22) are fixed on the load-adjusting counterweight plate (2).

8. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 1, characterized in that, The load-adjusting counterweight plate (2) is provided with a second horseshoe-shaped opening (23).

9. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 1, characterized in that, The basic counterweight (1) and the adjustment counterweight (2) have the same orthographic projection shape.

10. The adjustable load horseshoe-shaped limiting device for deep-water dynamic submarine cable laying according to claim 1, characterized in that, The first hoof opening (14) and the second hoof opening (23) have the same shape.

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