Passive dynamic positioning method and device for deep-sea long hard pipe

Abstract

The invention relates to the field of passive dynamic positioning of deep-sea long hard pipes, and particularly provides a method and device for passive dynamic positioning of deep-sea long hard pipes, the device comprises an annular guide rail, a sliding block, a roller and a guide plate, the annular guide rail is installed on the deep-sea long hard pipes, the sliding block is installed on the annular guide rail, the roller is installed on the sliding block, and the guide plate is installed on the roller. The flow guide plate is mounted on the side surface of the roller, and the flow guide plate is connected with the roller through a hinge; the radial acting force of water flow on the deep-sea long hard pipe can be reduced, and the swing amplitude of the deep-sea long hard pipe under ocean current is reduced.

Description

Technical Field

[0001] The invention relates to the field of marine pipeline dynamic positioning technology, and in particular to a deep-sea long rigid pipe passive dynamic positioning technology. Background Art

[0002] Deep sea long rigid pipe is a pipeline system specially designed for deep sea environment, which is used to connect deep sea mining facilities with surface operation platforms. This pipeline system is crucial to support deep sea operations, because it can not only transport materials such as minerals, gases and liquids, but also transmit sensor data and communication signals, thus providing necessary information support for operators.

[0003] Its reliability and durability directly affect the safety and efficiency of the entire operation. Therefore, developing technologies to extend the working life of deep-sea long rigid pipes is of great significance for promoting the sustainable use of marine resources and improving the overall performance of marine engineering.

[0004] Consider the dynamic factors of the ocean, such as the ever-changing ocean currents and waves. These factors will affect the stability of the pipeline. Therefore, during the operation, the deep-sea long rigid pipeline must remain relatively stable to prevent damage or failure caused by lateral swings and other phenomena. Summary of the invention

[0005] Based on this, it is necessary to provide a method and device for passively controlling the lateral displacement of deep-sea long rigid tubes to solve the problem of damage or failure caused by lateral oscillation of deep-sea long rigid tubes under the influence of ocean currents to solve the above problems.

[0006] A method and device for passive dynamic positioning of a deep-sea long rigid pipe, comprising an annular guide rail, a slider, a roller and a guide plate. The deep-sea long rigid pipe is sleeved with an annular guide rail, the slider is mounted on the annular guide rail, the roller is fixed on the slider, and the guide plate is mounted on the outside of the roller.

[0007] The guide plates are connected to the drum via hinges, and all guide plates are opened in a clockwise direction with a maximum opening angle of 90°. When the guide plates are at the maximum opening angle, they are perpendicular to the cross section of the drum.

[0008] In one embodiment, the entire device operates as follows:

[0009] S1: When the device is under the action of water flow, the opening angle of the guide plate changes, with the flow direction as the axis, one side of the guide plate opens to bear the impact force of the water flow, and the other side closes under the impact of the water flow;

[0010] S2: The asymmetric angle of the guide plate causes the drum to be subjected to an unbalanced torque and rotate clockwise;

[0011] S3: The device rotates with the water flow, reducing the radial force of the water flow on the deep-sea long rigid pipe and reducing the swing amplitude of the deep-sea long rigid pipe under the ocean current.

[0012] In one embodiment, the annular guide rail is a splicable device and has a buffer layer on the inner side;

[0013] In one embodiment, the slider has a ball and a ball returner inside, and the slider is connected to the drum through a fixing hole;

[0014] In one embodiment, the surfaces of the annular guide rail, the roller and the guide plate are all coated with an anti-fouling coating;

[0015] The above-mentioned method and device for passive dynamic positioning of deep-sea long rigid pipes have the following effects:

[0016] 1. As the water flow speed increases, the rotation speed of the drum will also increase, and the degree of change in the flow field around the deep-sea long hard pipe will be greater, thereby further reducing the proportion of energy directly acting on the deep-sea long hard pipe. Therefore, even in more extreme cases, the device can play a certain role.

[0017] 2. The device uses a hinge that can be opened and closed freely within a fixed angle range to control the change of the deflector angle, so that the device is always subjected to the unbalanced torque to produce rotation, making full use of the force of the water flow;

[0018] 3. The device uses a fixed annular guide rail plus a number of sliders to control the rotation of the drum. There are balls and lubricating oil inside the sliders, which is reliable and low-cost;

[0019] 4. The annular guide rail of the device is mounted on the deep-sea long hard pipe in the form of two semi-circular rings spliced ​​together, and the slider can also be pre-mounted on the annular guide rail for easy installation.

[0020] 5. The device has a simple structure and low cost. The number of installations can be increased according to the ocean current conditions to increase the protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall diagram of the device in the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the annular guide rail and the slider in the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the slider in the present invention.

[0024] In the attached figure:

[0025] 1. Deep sea long hard pipe 2. Roller 3. Guide plate 4. Hinge 5. Ring guide rail 6. Buffer layer

[0026] 7. Slider 8. Ball 9. Fixing hole 10. Ball return device DETAILED DESCRIPTION

[0027] Combine the following Figure 1 Figure 3 The present invention is further described. The present invention relates to a method and device for passive dynamic positioning of a deep-sea long rigid pipe, comprising an annular guide rail 5, a slider 7, a roller 2 and a guide plate 3. The deep-sea long rigid pipe 1 is sleeved with an annular guide rail 5, the inner side of the annular guide rail 5 is provided with a buffer layer, the slider 7 has a ball 8 inside, and a fixing hole 9 on the outer side, the roller 2 is fixed on the slider 7 through the fixing hole, the slider 7 is sleeved on the annular guide rail 5 and moves thereon, the guide plate 3 is installed on the outer side of the roller 2, the surfaces of the annular guide rail 5, the roller 2 and the guide plate 3 are all provided with an anti-fouling coating, wherein the guide plate 3 is connected to the roller 2 by a hinge, all the guide plates 3 are opened in the clockwise direction, and the maximum opening angle is 90°, and when the guide plate 3 is at the maximum opening angle, it is perpendicular to the cross section of the roller 2.

[0028] Under the action of water flow, the angles of the guide plates 3 will change. With the flow direction as the axis, the guide plates on one side will open to withstand the impact of the water flow, while the guide plates on the other side will close under the impact of the water flow, resulting in asymmetric angles of the guide plates 3, causing the drum 2 to be subjected to an unbalanced torque and rotate clockwise. The rotating device will reduce the radial force of the water flow on the deep-sea long rigid pipe, thereby achieving the purpose of reducing the swing amplitude of the deep-sea long rigid pipe.

[0029] The invention has a simple design, is safe and convenient to install, can effectively reduce the lateral swing amplitude of the deep-sea long rigid pipe, and has a good application prospect.

[0030] The embodiments described above are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. A deep-sea long rigid pipe passive dynamic positioning device, comprising an annular guide rail (5), a slider (7), a roller (2) and a guide plate (3), characterized in that: The annular guide rail (5) is sleeved on the deep-sea long hard pipe (1), the slider (7) is mounted on the annular guide rail, the roller (2) is mounted on the slider (7), and the guide plate (3) is mounted on the outside of the roller (2).

2. A deep-sea long rigid pipe passive dynamic positioning device according to claim 1, characterized in that: The guide plates (3) are connected to the drum (2) via hinges, and the guide plates (3) are all opened in a clockwise direction. When the guide plates (3) are at a maximum opening angle, they are perpendicular to the section of the drum (2).

3. A deep-sea long rigid pipe passive dynamic positioning device according to claim 1, characterized in that The working principle is as follows: S1: Under the action of water flow, the opening angle of the guide plate (3) changes, wherein a part of the guide plate (3) opens under the impact of water flow, and a part of the guide plate (3) closes under the impact of water flow; S2: The asymmetric opening angle of the guide plate (3) causes the drum (2) to be subjected to an unbalanced torque, thereby rotating in a clockwise direction; S3: The device rotates with the water flow, thereby reducing the radial force of the water flow on the deep-sea long rigid tube (1) and reducing the swing amplitude of the tube under the ocean current.

4. A deep-sea long rigid pipe passive dynamic positioning device according to claim 1, characterized in that: More than one annular guide rail (5) is installed, and a buffer layer (6) is provided on the inner side of the annular guide rail (5).

5. A deep-sea long rigid pipe passive dynamic positioning device according to claim 1, characterized in that: The slider (7) has a ball (8) and a ball return device (10) inside, and the slider (7) is connected to the roller (2) through a fixing hole (9).

6. A deep-sea long rigid pipe passive dynamic positioning device according to claim 1, characterized in that: The surfaces of the annular guide rail (5), the roller (2) and the guide plate (3) are all provided with an anti-fouling coating.

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