Centralized positioning protection device for submarine cable

Abstract

The invention discloses a centralized positioning protection device for a submarine cable. The device comprises a guiding awl, a positioning shaft, and a connecting shaft, wherein the three parts are successively connected. The guiding awl is formed by two symmetric parts and the head has a tapered structure; a guiding central hole is formed inside the guiding awl; a mounting groove is formed in the tail; and a bolt hole is formed in the side surface. The positioning shaft is formed by two symmetric parts; a central through hole is formed inside the positioning shaft; a mounting protrusion is arranged at the head of the positioning shaft; and the mounting protrusion and the mounting rove of the tail of the guiding awl in matched occlusion connection. The connecting shaft has the two symmetric parts; a central hole is formed inside the connecting shaft; a connecting flange is arranged at the head of the connecting shaft; and a connection protrusion is arranged at the tail of the connecting shaft. According to the invention, with the protection device, a cable at the lower port segment of the protection tube can be limited at the center of the protection tube, so that swinging of the submarine cable in the protection tube can be effectively controlled, collision with the rigid protection tube can be prevented, and fatigue damages of the submarine cable under the long-term effect of the ocean current can be avoided. Meanwhile, the provided device has advantages of simple structure, convenient installation, high reliability, and long service life.

Description

technical field [0001] The invention relates to a submarine cable center positioning protection device, which is particularly suitable for center positioning protection of oil platforms and offshore wind power submarine cables in protection pipes. Background technique [0002] With the increasing demand for energy in my country, the development of offshore oil and gas and offshore wind power is also rapidly increasing. As an important medium for power transmission, submarine cables are of utmost importance to their safety and reliability during use. The oil platform or offshore wind power submarine cable is passed from the bottom of the sea to the top of the platform through a rigid protective tube. In order to pass through the tube smoothly, the inner diameter of the submarine cable protective tube is generally about 3 times the outer diameter of the submarine cable. Therefore, the submarine cable will swing freely in the protective tube, especially at the outlet of the lo...

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Problems solved by technology

Therefore, the submarine cable will swing freely in the protective tube, especially at the outlet of the lower end of the protective tube, where the submarine cable is most severely affected by the ocean current. Fatigue and breakage of the cable causes the cable to be unable to transmit power, and eventually leads to the paralysis of the entire power system, resulting in huge economic losses

At present, the commonly used protection method is to use heavy objects to press the submarine cable out of the protective tube to prevent the movement of the submarine cable. This method can effectively control the movement of the submarine cable in a short period of time, but under the action of long-term ocean currents, the heavy objects will be washed away. The submarine cable can swing freely

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