A protective device for an underwater cable

Abstract

The invention discloses a protective device for an underwater cable, which includes a rigid protection pipe, A central positioning protection mechanism is arranged in the rigid protection pipe, the central positioning protection mechanism includes a guide head and a clamper for clamping the underwater cable which are connected in this order from front to back, The center of the guide head and theclamper is provided with an underwater cable through hole, a sealing assembly is arranged between the clamper and the rigid protective pipe, and the rear end of the clamper extends out the rigid protective pipe, characterized in that a locking mechanism for locking the installation position of the central positioning protection mechanism is arranged between the clamper and the rigid protective pipe. The advantage is that the mounting position of the central positioning protection mechanism is locked by means of a locking mechanism arranged between the clamper and the rigid protective tube, Itcan effectively reduce the risk of falling off after long-term use of the positioning protection device of the center, thus forming a more stable and reliable protection for the underwater cable, andeffectively prolonging the service life of the underwater cable.

Description

technical field [0001] The invention relates to the field of marine engineering, in particular to a protection device for underwater cables. 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. Submarine cables, dynamic cables, umbilical cables and other underwater cables are important media for power transmission, signal control, pressure transmission, etc., and their safety and reliability during use are crucial. Underwater cables used in oil platforms or offshore wind power platforms usually pass through rigid protective tubes from the seabed to the platform. In order to pass through the tubes smoothly, the inner diameter of the rigid protective tubes is generally about three times the outer diameter of the underwater cables, and The inlet part is in the shape of a bell mouth. Due to the size characteristics between the rigid protective tube and the ...

AI Technical Summary

Problems solved by technology

The fixing of the entire protection device mainly depends on the sealing ring stuck in the straight pipe section of the rigid protective pipe and the friction force clamping the underwater cable. After a period of time, the sealing ring will age and the friction force will decrease, which will lead to the failure of the protection device. The fixing ability between the rigid protective tube and the rigid protective tube is weakened, and at the same time, subject to the installation requirements, the underwater cable is not tight inside the rigid protective tube, and due to the reduction of the friction force of the fixed sealing ring, the entire protective device will deviate from the original For the set installation position, if the underwater cable is more loose, especially in deep water areas, the entire protection device may be separated from the bell mouth at the end of the rigid protective tube. Once the device is pulled out, the protection of the underwater cable will be lost, and the bell mouth will be caused The bending load of the external underwater cable increases, and the bending limiter cannot effectively limit the bending here. If it cannot be repaired in time, the underwater cable will be damaged prematurely, causing serious losses, and it must be reinstalled or repaired It will also bring huge construction costs and potential safety hazards.

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