CN109774857B - Novel lifting device and lifting method for cabin cover at bottom of ship moon pool - Google Patents

Abstract

The invention discloses a novel lifting device for a cabin cover at the bottom of a ship moon pool, which comprises a lifting winch, a bearing girder, a stabilizing auxiliary mechanism, a connecting joint and a lifting rigging, wherein the lifting winch is arranged at the front end and the rear end of the bearing girder, the stabilizing auxiliary mechanism is integrated with the bearing girder at the two sides of the bearing girder, the connecting joint is arranged on the bearing girder, and the lifting rigging is arranged on the lifting winch. The invention temporarily depends on the moon pool equipment lowering mechanism to open and close the bottom hatch cover, has simple process, safety and reliability, strong operability and adaptability, and can reduce the risk of pollution of oil leakage to the ocean, thereby reducing the ship construction and operation cost.

Description

Novel lifting device and lifting method for cabin cover at bottom of ship moon pool

Technical Field

The invention relates to a novel lifting device and a lifting method for a cabin cover at the bottom of a ship moon pool.

Background

The ocean field breeds huge resources, and the ocean engineering auxiliary ship is used as an important organization part of ocean engineering equipment and provides continuous operation, environmental protection, cooperation, supply and other all-round service guarantees for an ocean engineering platform in the whole life cycle of ocean engineering.

At present, an ocean engineering auxiliary engineering ship is often provided with an underwater Robot (ROV) or a diving bell to meet the necessary premise of carrying out underwater operation or deepwater operation, a cabin cover at the bottom of a moon pool of a ship body needs to be opened before the ROV or the diving bell is put under the water, according to the past design experience, the cabin cover at the bottom of the moon pool of the ship body is usually designed into an electric hydraulic opening mode, the design is complex, the design of the peripheral structure at the bottom of the moon pool is also complex, the whole construction cost is very expensive, because the cabin cover is positioned below a water line surface, the opening and closing operation of the cabin cover needs a hydraulic system as power, the cabin cover and some main hydraulic components can be arranged in the moon pool, such as a hydraulic cylinder, a pipe fitting and the like, after the cabin cover is opened, the cabin cover and the components can be completely soaked in the seawater, and the cabin cover can be corroded by the seawater for a long time according to a frequent operation period, thereby reducing the service life of the hatch cover system and further increasing the risk of oil leakage in the hydraulic system.

In recent years, with the continuous enhancement of the environmental protection consciousness of oceans, the sea pollution hidden danger caused by oil leakage of relevant organizations of various countries is gradually prevented, typically, the united states environmental protection agency issues relevant requirements in 2013, the idea is to prohibit the use of conventional hydraulic oil and lubricating oil at the position below the draft of ships in the united states sea area so as to prevent the pollution caused by leakage to oceans, and the degradable biological oil is used as an alternative scheme, and based on the self characteristics of the biological oil, the technology is not popularized yet and is mostly researched as a scientific research project.

Disclosure of Invention

The invention aims to provide a novel lifting device for a bottom hatch cover of a moon pool of a ship, which can well realize the opening and closing operation of the bottom hatch cover of the moon pool on the basis of ensuring zero risk of oil leakage.

The technical scheme adopted by the invention for realizing the purpose is as follows: the utility model provides a novel boats and ships moon pool bottom cabin cover promotes device, includes lifting winch, bearing girder, stabilizes complementary unit, attach fitting and promotes rigging, lifting winch installs both ends around the bearing girder, stabilize complementary unit in the both sides and the integrative structure of bearing girder, attach fitting installs on the bearing girder, it sets up on promoting the winch to promote the rigging.

The invention also aims to provide a hatch cover lifting method of the novel ship moon pool bottom hatch cover lifting device.

The technical scheme adopted by the invention for realizing the purpose is as follows: a hatch cover lifting method of a novel ship moon pool bottom hatch cover lifting system can well realize the opening and closing operation of a moon pool bottom hatch cover on the basis of ensuring zero risk of oil leakage, and comprises the following steps:

A. the lifting device is lowered to the upper part of the hatch cover, a lifting rigging on the lifting device is connected with a lifting point of the hatch cover, and the lifting device is lifted, so that a steel wire rope of the lifting device is in a tensioned state;

B. and (4) removing the connecting bolts of the hatch cover and the ship body, and draining water into the moon pool until the water in the moon pool is consistent with the water outside the ship. Lowering the lifting device to a certain height, and operating a lifting winch on the lifting device to turn over the hatch cover until the hatch cover is completely vertical;

C. operating the lifting device to enable the lifting device to rotate until the hatch cover is parallel to the diagonal line of the moon pool;

D. and lifting the lifting device until the bottom of the hatch cover is higher than the main deck, and then transferring the cover to other areas to finish the opening and lifting operation of the hatch cover.

The novel lifting device and the lifting method for the cabin cover at the bottom of the ship moon pool are simple in design and reliable in use; the oil product leakage can be effectively prevented, so that the pollution to the marine environment is avoided; compared with the use of an electric hydraulic cabin cover, the structural design and construction difficulty of the moon pool are reduced; compared with the electric hydraulic type hatch cover, the design of the hatch cover at the bottom of the moon pool is simplified, and the ship construction cost can be greatly reduced; the lifting system and the lifting method are very wide and flexible in application and can be suitable for various sizes of relevant ocean engineering ships; based on the power used by the operation of the lifting device, the hydraulic system of the underwater robot or the saturated diving bell type lowering equipment can be integrated, or a small portable hydraulic unit is temporarily placed on a freeboard deck, so that the arrangement of ship deck equipment is facilitated, and the utilization rate of the deck is improved.

Drawings

Fig. 1 is a schematic structural diagram of a novel lifting device for a cabin cover at the bottom of a ship moon pool.

Fig. 2 is a side view of the interior of the moon pool when the lifting device of the novel lifting device and lifting method for the bottom hatch of the moon pool of the ship is connected with the bottom hatch of the moon pool.

Fig. 3 is a top view of the interior of the moon pool when the lifting device of the novel lifting device and lifting method for the bottom hatch cover of the moon pool of the ship is connected with the bottom hatch cover of the moon pool.

Fig. 4 is a schematic diagram of the lifting device and the lifting method of the hatch cover at the bottom of the moon pool of the novel ship, which are used for vertically turning the hatch cover under water.

Fig. 5 is a top view of the lifting device and the hatch cover horizontally rotating to the diagonal position of the moon pool for the lifting device and the lifting method for the hatch cover at the bottom of the moon pool of the novel ship.

Fig. 6 is a view from the direction of fig. 5A-a.

Fig. 7 is a view from the direction of fig. 5B-B.

In the figure: 1. a hull moon pool structure; 2. a moonpool bottom hatch cover; 3. a lifting device; 3a, lifting a winch; 3b, lifting a system bearing main beam; 3c, lifting a system stabilizing auxiliary structure; 3d, lifting the system connecting joint; 3e, lifting the rigging; 4. underwater robots or saturated diving bell lowering systems.

Detailed Description

A novel lifting device and a lifting method for a cabin cover at the bottom of a ship moon pool are disclosed, as shown in figures 2 and 3, the cabin cover at the bottom of the moon pool 2 is simplified and designed according to the specific structure of the bottom of the moon pool so that the cabin cover only has required structural strength and reliable water tightness, the cabin cover can be connected with a ship body structure through common bolts, and finally 4 hoisting eye plates are designed and installed according to the selected lifting device to be used as hoisting points for connecting the lifting device, as shown in figure 1, the novel lifting device for the cabin cover at the bottom of the ship moon pool comprises a lifting winch 3a, a bearing main beam 3b, a stabilizing auxiliary mechanism 3c, a connecting joint 3d and a lifting rigging 3e, the lifting winch 3a is installed at the front end and the rear end of the bearing main beam 3b, the stabilizing auxiliary mechanism 3c is integrated with the bearing main beam 3b at the two sides of the bearing main beam 3b, the connecting joint 3d is installed on the bearing main beam 3b, the lifting rigging 3e is arranged on the lifting winch 3a, and as for a power source required for operating the winch, only two interfaces (one inlet and one outlet) and a reversing valve are reserved by virtue of the power source of a lowering system, and a hydraulic hose is used for being matched with a quick interface to be connected with a lifting device; or a small portable power unit can be arranged on the freeboard deck and can be manually operated or electrically operated; as shown in fig. 1 to 7, the lifting method of the novel lifting device for the bottom hatch cover of the ship moon pool comprises the following specific steps: A. when the hatch cover at the bottom of the moon pool is opened, the lifting device is temporarily attached to an underwater robot or a saturated diving bell lowering system 4, the lifting device 3 is lowered above the hatch cover 2 at the bottom of the moon pool, a lifting rigging 3e on the lifting device 3 is connected with a lifting point of the hatch cover 2 at the bottom of the moon pool, and the lifting device 3 is lifted, so that a steel wire rope of the lifting device is in a tensioned state; B. then removing the connecting bolt between the hatch cover 2 at the bottom of the moon pool and the ship body, beginning to drain water into the moon pool structure 1 of the ship body until the draught in the moon pool is consistent with that outside the ship, at the moment, descending the lifting device to a certain height, operating the lifting winch 3a on the lifting device, and turning over the hatch cover until the hatch cover is completely vertical; D. the lifting device is operated to rotate until the hatch cover is parallel to the diagonal line of the moon pool, then the lifting device is lifted until the bottom of the hatch cover is higher than the main deck, then the cover is transferred to other areas by other measures, and finally the opening and lifting operation of the hatch cover is completed.

Claims (1)

1. The utility model provides a novel cabin cover of boats and ships moon pool bottom cabin cover hoisting device promotes method, novel boats and ships moon pool bottom cabin cover hoisting device, including lifting winch, bearing girder, stable complementary unit, attach fitting and lifting rigging, the lifting winch is installed at both ends around the bearing girder, stabilizes complementary unit in the both sides of bearing girder and bearing girder body structure, the attach fitting is installed on the bearing girder, the lifting rigging sets up on the lifting winch, its characterized in that, include following step:

A. the lifting device is lowered to the upper part of the hatch cover, a lifting rigging on the lifting device is connected with a lifting point of the hatch cover, and the lifting device is lifted, so that a steel wire rope of the lifting device is in a tensioned state;

B. removing connecting bolts of the hatch cover and the ship body, draining water into the moon pool until the water in the moon pool is consistent with the water outside the ship, descending the lifting device to a certain height, and operating a lifting winch on the lifting device to turn over the hatch cover until the hatch cover is completely vertical;

C. operating the lifting device to enable the lifting device to rotate until the hatch cover is parallel to the diagonal line of the moon pool;

D. and lifting the lifting device until the bottom of the hatch cover is higher than the main deck, and then transferring the cover to other areas to finish the opening and lifting operation of the hatch cover.

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