CN-121687681-B - Working method of mechanical retractable offshore demagnetizing device

CN121687681BCN 121687681 BCN121687681 BCN 121687681BCN-121687681-B

Abstract

A working method of a mechanical retractable offshore demagnetizing device relates to the technical field of demagnetization. The method comprises the steps of adopting a motorized degaussing cable collecting and releasing ship and a heavy-load degaussing cable bundle, integrating a cable bundle collecting and releasing reel, a cable bundle conveying crawler, a cable bundle collecting and releasing operation control platform and the like on the motorized degaussing cable collecting and releasing ship, and being used for distributing and recovering the heavy-load degaussing cable bundle during daily storage and degaussing operation, wherein the heavy-load degaussing cable bundle is coated with buoyancy materials outside and can float on the water surface to surround a degaussing target for degaussing operation. When the demagnetizing operation is started, the motorized demagnetizing cable winding and unwinding ship can unwind the cable at a constant speed in water to complete the safe unwinding of the long-distance heavy-load cable bundle. After the degaussing cable is bundled and wound around the ship to form a closed coil, a degaussing field can be generated in the coil, and degaussing operation is completed.

Inventors

YU DAPENG
ZHANG TIANXIANG
Zhong Kaiye
CHEN YUNFEI
ZHOU CHANGFEI
ZHAO TIANFENG
CHEN BOHAN
SUN YOUJIAN
PENG HE
YANG FENG
CHEN BINGNAN

Assignees

大连理工大学
中国石油大学(北京)
秦皇岛耀华装备集团股份有限公司
大连宝原核设备股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (7)

1. A working method of a mechanical retractable marine demagnetizing device is characterized by adopting a motorized demagnetizing cable collecting and releasing ship and a heavy-load demagnetizing cable bundle, wherein the motorized demagnetizing cable collecting and releasing ship integrates a cable bundle collecting and releasing reel, a cable bundle conveying crawler, a cable bundle collecting and releasing operation control platform, a control room and a power cabinet; aiming at large-scale target operation, the method comprises the following steps: S1, preparing, namely mooring a motorized demagnetizing cable winding and unwinding ship at a wharf for standby before starting operation aiming at a large target, wherein a cable bundling roll is arranged on a winding drum, the head end of the cable bundling is released by the winding drum and a cable bundling conveying crawler belt, and finally the head end is connected to an onshore power cabinet; s2, placing the cable Shu Bu, namely after the operation is started, driving the motorized demagnetizing cable winding and unwinding boat away from the wharf to a specified position, synchronously adjusting the output speeds of the winding drum and the conveying crawler belt by the control system, stably placing the cable bundle on the water surface, and floating the cable on the water surface; S3, target berthing, namely when the motorized demagnetizing cable winding and unwinding ship reaches a designated position, completing cable bundling and unwinding, after target berthing, the motorized demagnetizing cable winding and unwinding ship sails according to the track around the target ship, so that the motorized demagnetizing cable winding and unwinding ship forms a horizontal surrounding track under the condition of not contacting the target ship body, and finally the cable bundling surrounds the demagnetizing target; S4, when the motorized demagnetizing cable winding and unwinding boat returns to the wharf, mooring the motorized demagnetizing cable winding and unwinding boat at the wharf, and separating the tail end of the cable cluster from the motorized demagnetizing cable winding and unwinding boat through the cable cluster conveying crawler to be connected with an onshore power supply, wherein the cable cluster forms a closed loop; s5, electrifying and demagnetizing, namely driving the motorized demagnetizing cable winding and unwinding boat away from the wharf, and finally electrifying and demagnetizing; For small target jobs, comprising the steps of: a. Before the operation starts, the degaussing target is anchored on the sea surface, and the motorized degaussing cable winding and unwinding ship runs to the head of the target; the motor-driven demagnetizing cable winding and unwinding boat floats on the sea surface, the heavy-load cable bundling roll is arranged on the reel, the head end of the cable bundle is released by the reel and the cable bundle conveying crawler belt, and the head end of the cable bundle is fixed at the head part of the demagnetizing target; b. after the operation is started, the motorized degaussing cable winding and unwinding ship sails according to the track around the target ship, and meanwhile, the control system synchronously adjusts the output speeds of the winding drum and the conveying crawler belt, so that the cable bundles are stably laid on the water surface; c. the motorized demagnetizing cable winding and unwinding ship bypasses the target ship and returns to the bow, and the head end of the recovery cable bundle is connected to a power cabinet on the motorized demagnetizing cable winding and unwinding ship, and the heavy-load demagnetizing cable bundle surrounds the target; d. When the head end of the cable bundle is recovered by the motorized demagnetizing cable winding and unwinding ship, the tail end of the cable bundle is separated from the winding drum through the cable bundle conveying crawler belt and is connected with the power cabinet on the ship, and the cable bundle forms a closed loop; e. the motorized demagnetizing cable winding and unwinding ship supplies power before the target ship, and finally, the power is electrified for demagnetizing; The heavy-load degaussing cable bundling comprises a two-dimensional rectangular long cable bundling or a multi-core round long cable bundling with different rigidity, which are made of a plurality of cable glue injection; the large target is a ship or a ship with a displacement of more than 2 ten thousand tons or a length of more than 200 meters, and the rest is a small target.
2. The method of claim 1, wherein the motorized degaussing cable reel is moored at a dock for storing a bundle of cables.
3. The method of claim 2, wherein the motorized degaussing cable take-up and pay-off vessel is provided with a cable bundle take-up and pay-off reel, which is used as a reel when arranged vertically and as a reel when arranged laterally to perform the take-up and pay-off operation of the cable bundle.
4. The method of operating a mechanical retractable marine degaussing apparatus in accordance with claim 3, wherein a cable bundle take-up reel on a motorized degaussing cable take-up vessel is used for storing a cable bundle, a power supply is started when the cable bundle is deployed, the reel is unwound for cable bundle deployment, and the reel is wound for cable bundle recovery when the cable bundle is recovered.
5. The method of claim 4, wherein the motorized demagnetizing cable winding and unwinding vessel is provided with a control room, and a control cabinet is integrated in the control room, and the control cabinet adjusts the winding and unwinding speed of the cable bundle in real time.
6. The method of claim 5, wherein the cable bundle winding and unwinding operation control platform on the motorized degaussing cable winding and unwinding ship selects a winding and unwinding mode of the cable bundle, and field setting and state monitoring of speed parameters of cable unwinding and winding are achieved.
7. The method of claim 6, wherein the heavy-duty cable is wrapped with a buoyancy material outside the cable bundle to float on the water surface, and the cable bundle is naturally unfolded on the water surface and is in end-to-end butt joint with the power supply terminal cabinet to form a single-turn closed coil, and the demagnetizing operation is completed after current is introduced.

Description

Working method of mechanical retractable offshore demagnetizing device Technical Field The invention relates to the technical field of demagnetization, in particular to a working method of a mechanical retractable marine demagnetizing device. Background The demagnetizing operation of the ship and the marine target is mainly divided into a fixed demagnetizing station and a motor-driven demagnetizing ship. The fixed demagnetizing device has good effect, but has strong site dependence, high construction cost and no movement, and is difficult to meet the requirements of demagnetizing in open sea, and the mobile demagnetizing ship mainly demagnetizes small and medium-sized ships and is flexible and mobile, but has long operation period, and is difficult to meet the requirements of emergency demagnetization and demagnetizing of large ships. In addition, both the fixed degaussing device and the motor-driven degaussing ship adopt a wrapping type technical means, namely, the degaussing cable is clung to the ship shell to be longitudinally wound in a three-dimensional mode through manual or auxiliary machinery, so that labor is consumed, operation time is prolonged, direct contact between the cable and the ship body inevitably causes bidirectional physical abrasion, the ship protective performance is damaged, and the service life of the cable is shortened. Disclosure of Invention Aiming at the problems, the invention provides a working method of a mechanical retractable marine demagnetizing device, which adopts a non-contact surrounding type layout to replace the traditional contact winding type layout, and utilizes an integrated device to construct a horizontal closed demagnetizing loop on the periphery of a target ship. The method not only saves manpower, simplifies the arrangement process, shortens the operation time, but also eliminates the abrasion between the cable and the degaussing target, ensures the integrity of the target protection, prolongs the service life of equipment, and is suitable for the offshore degaussing device. The technical scheme includes that the mechanical retractable marine demagnetizing device comprises a motorized demagnetizing cable collecting and releasing ship and a heavy-load demagnetizing cable bundle, wherein the motorized demagnetizing cable collecting and releasing ship integrates a cable bundle collecting and releasing reel, a cable bundle conveying crawler, a cable bundle collecting and releasing operation control platform, a control room and a power cabinet; aiming at large-scale target operation, the method comprises the following steps: S1, preparing, namely mooring a motorized demagnetizing cable winding and unwinding ship at a wharf for standby before starting operation aiming at a large target, wherein a cable bundling roll is arranged on a winding drum, the head end of the cable bundling is released by the winding drum and a cable bundling conveying crawler belt, and finally the head end is connected to an onshore power cabinet; s2, placing the cable Shu Bu, namely after the operation is started, driving the motorized demagnetizing cable winding and unwinding boat away from the wharf to a specified position, synchronously adjusting the output speeds of the winding drum and the conveying crawler belt by the control system, stably placing the cable bundle on the water surface, and floating the cable on the water surface; S3, target berthing, namely when the motorized demagnetizing cable winding and unwinding ship reaches a designated position, completing cable bundling and unwinding, after target berthing, the motorized demagnetizing cable winding and unwinding ship sails according to the track around the target ship, so that the motorized demagnetizing cable winding and unwinding ship forms a horizontal surrounding track under the condition of not contacting the target ship body, and finally the cable bundling surrounds the demagnetizing target; S4, when the motorized demagnetizing cable winding and unwinding boat returns to the wharf, mooring the motorized demagnetizing cable winding and unwinding boat at the wharf, and separating the tail end of the cable cluster from the motorized demagnetizing cable winding and unwinding boat through the cable cluster conveying crawler to be connected with an onshore power supply, wherein the cable cluster forms a closed loop; s5, electrifying and demagnetizing, namely driving the motorized demagnetizing cable winding and unwinding boat away from the wharf, and finally electrifying and demagnetizing; For small target jobs, comprising the steps of: a. Before the operation starts, the degaussing target is anchored on the sea surface, and the motorized degaussing cable winding and unwinding ship runs to the head of the target; the motor-driven demagnetizing cable winding and unwinding boat floats on the sea surface, the heavy-load cable bundling roll is arranged on the reel, the head end of the cable bundle is released by the reel and t