Submarine cable landing pipe ventilation structure

Abstract

The utility model discloses a submarine cable landing pipe ventilation structure which comprises a landing pipe (1), one end of the landing pipe (1) is fixedly connected to an offshore operation platform (2), the other end of the landing pipe (1) is inserted into a seabed (3), and a submarine cable (6) landing to the offshore operation platform (2) from the seabed (3) can penetrate through the interior of the landing pipe (1). The portion, between the offshore operation platform (2) and the sea level, of the landing pipe (1) is a ventilation heat dissipation section (1.1), a plurality of evenly-distributed heat dissipation holes (4) are formed in the pipe wall of the ventilation heat dissipation section (1.1), and a plurality of heat dissipation cutting grooves (5) are further formed in the pipe wall of the ventilation heat dissipation section (1.1) in the axial direction. The ventilation structure of the submarine cable landing pipe can effectively prevent a high-temperature environment from being formed in the landing pipe so as to improve the current-carrying capacity of the submarine cable.

Description

Technical Field

[0001] This utility model relates to the field of submarine cable laying structures, specifically a ventilation structure for submarine cable landing pipes. Background Technology

[0002] During the laying of submarine cables connected to offshore operating platforms, in order to ensure the stability of the connection between the submarine cable and the offshore operating platform, a landing pipe is fixed at the lower end of the offshore operating platform. Then, the submarine cable passes through the landing pipe from the seabed and connects to the offshore operating platform, thereby reducing the length of the dynamic section of the submarine cable between the offshore operating platform and the seabed and enhancing the laying stability of the submarine cable.

[0003] However, during the process of the submarine cable passing through the landing pipe, the area where the submarine cable is above sea level is prone to temperature rise due to the heat generated by the submarine cable and the sealing of the landing pipe. In other words, the submarine cable above sea level will be transmitting electricity in a high-temperature environment, which will reduce the current carrying capacity of the submarine cable and affect the power transmission efficiency. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a ventilation structure for submarine cable landing pipe that effectively avoids the formation of a high-temperature environment inside the landing pipe, thereby increasing the current carrying capacity of the submarine cable.

[0005] The technical solution adopted by this utility model to solve the above problems is as follows: a submarine cable landing pipe ventilation structure, including a landing pipe, one end of which is fixedly connected to an offshore operating platform, and the other end of which is inserted into the seabed. The interior of the landing pipe is used for the submarine cable to pass through from the seabed to the offshore operating platform. The landing pipe between the offshore operating platform and the sea surface is a ventilation and heat dissipation section. The pipe wall of the ventilation and heat dissipation section is provided with a number of evenly distributed heat dissipation holes, and the pipe wall of the ventilation and heat dissipation section is also provided with a number of heat dissipation grooves arranged along the axial direction.

[0006] Compared with the prior art, the advantages of this utility model are as follows: In the landing pipe, the landing pipe inserted into the sea surface is not prone to creating a high-temperature environment because it is immersed in seawater. The ventilation and heat dissipation section adopts two heat dissipation structure designs: heat dissipation holes and heat dissipation grooves, to ensure the effectiveness of heat dissipation. The design of heat dissipation holes plays a role in preventing the ventilation and heat dissipation section from heating too quickly, ensuring that the area with heat dissipation holes always receives effective ventilation and heat dissipation. The design of heat dissipation grooves can achieve a significant heat dissipation purpose, enhancing the heat dissipation that the heat dissipation holes cannot complete in time, without compromising the structural stability of the ventilation and heat dissipation section. If the landing pipe is suspended and not inserted into the seabed, the heat dissipation grooves are prone to causing uneven stress on the ventilation and heat dissipation section, resulting in damage.

[0007] As an improvement of this utility model, the arc of the heat dissipation groove is 90° to 120°. Through this improvement, the opening range of the heat dissipation groove is guaranteed, thereby ensuring the effectiveness of heat dissipation, while not affecting the structural stability of the ventilation and heat dissipation section, and ensuring that the ventilation and heat dissipation section at the heat dissipation groove has sufficient structural strength.

[0008] As an improvement of this utility model, several of the heat dissipation grooves are arranged in a uniform array along the circumference. Through this improvement, the structural uniformity of the ventilation and heat dissipation section is ensured, thereby ensuring the structural stability of the landing pipe and making it less prone to bending, breakage and other problems.

[0009] As an improvement of this utility model, the width of the heat dissipation groove is 100-200mm, and the improvement ensures the ventilation and heat dissipation effect.

[0010] As an improvement of this utility model, the axial distance between two adjacent heat dissipation grooves is 1000-1400mm. Through this improvement, the axial distance between the heat dissipation grooves is reasonably controlled. If the distance is too long, the heat dissipation effect is poor; if the distance is too short, the structural strength of the landing tube is poor, which is not conducive to the stability of the landing tube in use.

[0011] As an improvement of this utility model, the corner of the heat dissipation groove is arc-shaped. With this improvement, if the corner of the heat dissipation groove is kept at a right angle, it will easily cause stress concentration, making the corner prone to breakage. Since the insertion depth of the end of the landing pipe inserted into the seabed is limited, it cannot fully support the stability of the landing pipe. It is also necessary to use the suspension effect of the offshore operation platform to increase the stability of the landing pipe. The weight of the landing pipe itself and the suspension force of the offshore operation platform can easily cause stress concentration and breakage.

[0012] As an improvement of this utility model, the heat dissipation holes form a plurality of heat dissipation hole rings along the axial direction of the landing pipe. The heat dissipation holes on each heat dissipation hole ring are arranged in a uniform array along the circumference. The distance between two adjacent heat dissipation hole rings is not less than the diameter of the heat dissipation hole. Through this improvement, the uniformity of heat dissipation is ensured, while also ensuring the uniformity of the structural strength of the ventilation and heat dissipation section.

[0013] As an improvement of this utility model, a gap is provided between the heat dissipation groove and the adjacent heat dissipation hole ring. The width of the gap is not less than the diameter of the heat dissipation hole. Through this improvement, the cut edge of the heat dissipation groove is prevented from passing through the heat dissipation hole, which can easily cause a decrease in structural uniformity and also form a sharp structure that can easily cause damage.

[0014] As an improvement of this utility model, the heat dissipation holes on two adjacent heat dissipation hole rings are staggered along the axial direction. This improvement ensures the uniformity of heat dissipation for the submarine cable.

[0015] As an improvement of this utility model, the inner diameter of the landing pipe is more than twice the diameter of the submarine cable, ensuring ventilation space between the landing pipe and the submarine cable and ensuring ventilation and heat dissipation effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall application structure of this utility model.

[0017] Figure 2 This is a partial structural diagram of the ventilation and heat dissipation section of this utility model.

[0018] Figure 3 This is a schematic diagram of the unfolded structure of the ventilation and heat dissipation section of this utility model.

[0019] Figure 4 This is a partial cross-sectional view of the ventilation and heat dissipation section of this utility model.

[0020] The diagram shows: 1. Landing pipe, 1.1. Ventilation and heat dissipation section, 2. Offshore operating platform, 3. Seabed, 4. Heat dissipation hole, 5. Heat dissipation groove, 6. Submarine cable. Detailed Implementation

[0021] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0022] like Figure 1-2 As shown, a submarine cable landing pipe ventilation structure includes a landing pipe 1. One end of the landing pipe 1 is fixedly connected to an offshore operating platform 2, and the other end of the landing pipe 1 is inserted into the seabed 3. The interior of the landing pipe 1 is used for the submarine cable 6 to be landed from the seabed 3 to the offshore operating platform 2. A side opening for the submarine cable 6 to pass through is provided at the connection between the landing pipe 1 and the seabed 3. The landing pipe 1 between the offshore operating platform 2 and the sea surface is a ventilation and heat dissipation section 1.1. The wall of the ventilation and heat dissipation section 1.1 is provided with a number of evenly distributed heat dissipation holes 4, and the wall of the ventilation and heat dissipation section 1.1 is also provided with six heat dissipation grooves 5 arranged along the axial direction.

[0023] like Figure 2-3 As shown, the arc of the heat dissipation groove 5 is 120°, and the six heat dissipation grooves 5 are evenly arranged in a circumferential array. The width of the heat dissipation groove 5 is 150mm, the axial distance between two adjacent heat dissipation grooves 5 is 1200mm, and the corners of the heat dissipation groove 5 are arc-shaped.

[0024] The heat dissipation holes 4 form a plurality of heat dissipation hole rings along the axial direction of the landing pipe 1. The heat dissipation holes 4 on each heat dissipation hole ring are evenly arranged in a circumferential array. The distance between two adjacent heat dissipation hole rings is not less than the diameter of the heat dissipation hole 4. The heat dissipation groove 5 is provided with a gap between it and the adjacent heat dissipation hole rings. The width of the gap is not less than the diameter of the heat dissipation hole 4. The heat dissipation holes 4 on two adjacent heat dissipation hole rings are staggered along the axial direction.

[0025] like Figure 4 As shown, the inner diameter of the landing tube 1 is more than twice the diameter of the submarine cable 6.

[0026] Through the design of a ventilation structure for a submarine cable landing pipe, two heat dissipation structures, heat dissipation holes 4 and heat dissipation grooves 5, are adopted in the ventilation and heat dissipation section 1.1 to ensure the effectiveness of heat dissipation. The design of heat dissipation holes 4 plays a role in preventing the temperature of the ventilation and heat dissipation section 1.1 from rising too quickly, ensuring that the area with heat dissipation holes 4 always receives effective ventilation and heat dissipation. The design of heat dissipation grooves 5 can achieve a significant heat dissipation purpose, enhancing the heat dissipation work that heat dissipation holes 4 cannot complete in time, ensuring the effectiveness of heat dissipation, thereby preventing the submarine cable 6 from operating in a high-temperature environment, increasing the current carrying capacity of the submarine cable 6, and thus improving the power transmission efficiency. The distribution design of the heat dissipation grooves 5 and the arc-shaped design of the groove corners of the heat dissipation grooves 5 ensure the structural uniformity and stability of the ventilation and heat dissipation section 1.1, thereby ensuring the structural strength of the landing pipe 1 and preventing the landing pipe 1 from being easily damaged.

[0027] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A ventilation structure for a submarine cable landing pipe, characterized in that: The system includes a landing pipe (1), one end of which is fixedly connected to the offshore operating platform (2), and the other end of which is inserted into the seabed (3). The interior of the landing pipe (1) is used for the submarine cable (6) to be laid from the seabed (3) to the offshore operating platform (2). The landing pipe (1) between the offshore operating platform (2) and the sea surface is a ventilation and heat dissipation section (1.1). The ventilation and heat dissipation section (1.1) has several evenly distributed heat dissipation holes (4) on its pipe wall, and the ventilation and heat dissipation section (1.1) also has several heat dissipation grooves (5) arranged along the axial direction on its pipe wall.

2. The ventilation structure for a submarine cable landing pipe according to claim 1, characterized in that: The arc of the heat dissipation groove (5) is 90° to 120°.

3. The ventilation structure for a submarine cable landing pipe according to claim 2, characterized in that: Several heat dissipation slots (5) are arranged in a uniform array along the circumference.

4. The ventilation structure for a submarine cable landing pipe according to claim 1, characterized in that: The width of the heat dissipation groove (5) is 100-200mm.

5. The ventilation structure for a submarine cable landing pipe according to claim 4, characterized in that: The axial distance between two adjacent heat dissipation grooves (5) is 1000-1400 mm.

6. The ventilation structure for a submarine cable landing pipe according to claim 1, characterized in that: The corner of the heat dissipation groove (5) is arc-shaped.

7. The ventilation structure for a submarine cable landing pipe according to claim 1, characterized in that: The heat dissipation holes (4) form a plurality of heat dissipation hole (4) rings along the axial direction of the landing pipe (1). The heat dissipation holes (4) on each heat dissipation hole (4) ring are arranged in a uniform array along the circumference, and the distance between two adjacent heat dissipation hole (4) rings is not less than the diameter of the heat dissipation hole (4).

8. The ventilation structure for a submarine cable landing pipe according to claim 7, characterized in that: A gap is provided between the heat dissipation groove (5) and the adjacent heat dissipation hole (4) ring, and the width of the gap is not less than the diameter of the heat dissipation hole (4).

9. The ventilation structure for a submarine cable landing pipe according to claim 7, characterized in that: The heat dissipation holes (4) on the two adjacent heat dissipation holes (4) rings are staggered along the axial direction.

10. The ventilation structure for a submarine cable landing pipe according to claim 1, characterized in that: The inner diameter of the landing tube (1) is twice the diameter of the submarine cable (6).

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