Floating type lifting device for underwater salvage and lifting test

Abstract

The invention relates to a floating lifting device for underwater salvage and lifting tests, which comprises a catamaran and an annular crane, the catamaran comprises two single boats, and the two single boats are connected through a connecting bridge; a supporting base is arranged in the middle of the catamaran, and the annular crane is installed on the supporting base. According to the floating type lifting device, the water surface state is stable, the floating type lifting device can be salvaged and lifted in a stable posture under the severe sea condition, horizontal movement and rotation of a salvaged object can be accurately controlled within a certain range, and it is guaranteed that the posture of the lifted object is stable and controllable.

Description

Technical Field

[0001] The invention relates to a crane ship, in particular to a floating crane device used for underwater salvage and lifting tests, belonging to the technical field of ships and marine engineering. Background Art

[0002] In shipbuilding and marine engineering, crane vessels are a common type of engineering vessel, usually used to lift equipment and structures to their destination and salvage underwater structures.

[0003] At present, this type of crane ship is usually a monohull ship, and the lifting equipment is set at the stern. Since the lifting weight is at the stern, the following risks are prone to occur when salvaging objects:

[0004] 1. When salvaging heavier underwater objects, there is a risk of severe tail trim or heeling, which may lead to capsizing accidents;

[0005] 2. This type of lifting vessel usually relies on the rotation of a long crane boom to change the posture of the lifted object. The range of motion is too large to achieve the refined operation of rotating and moving the salvaged object in situ;

[0006] 3. During the salvage process, the ballast water in the hull needs to be adjusted as the position of the crane changes. Due to the asymmetry of the crane position, more ballast tanks need to be designed for balance adjustment. This places high demands on the layout and adjustment capabilities of the entire ship's cabins;

[0007] 4. For harsh sea conditions, the monohull has poor anti-rolling capability and cannot achieve stable salvage in harsh sea conditions. Summary of the invention

[0008] The object of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a floating lifting device for underwater salvage and lifting tests. The floating lifting device has a stable surface state, can salvage and lift the floating device with a stable posture under severe sea conditions, and can accurately control the horizontal movement and rotation of the salvaged object within a certain range, ensuring that the posture of the lifted object is stable and controllable.

[0009] The technical solution adopted to achieve the purpose of the present invention is a floating lifting device for underwater salvage and lifting tests, which includes a catamaran and an annular crane. The catamaran includes two single-hull ships, and the two single-hull ships are connected by a connecting bridge; a supporting base is provided in the middle of the catamaran, and the annular crane is installed on the supporting base.

[0010] In the above technical solution, the annular crane includes an annular beam, a main beam and a crane. The annular beam is installed on a supporting base, the main beam rotates on the annular beam through rollers, and the crane moves horizontally on the main beam through rollers.

[0011] In the above technical solution, the connecting bridge is respectively connected to the bow or stern of the two monohulls.

[0012] Furthermore, a control room is connected between the two monohulls.

[0013] In the above technical solution, the connecting bridge is an arch bridge structure.

[0014] The present invention has the following advantages:

[0015] 1. Compared with the single-hull crane ship in the prior art, the catamaran ship of the present invention is less affected by the waves and has a more stable hull. Therefore, it has good stability and anti-roll performance on the water surface and can remain relatively stable in severe sea conditions, which is conducive to the smooth salvage operation of the ship without capsizing.

[0016] 2. The crane is set in the middle of the catamaran and straddles the catamaran, so that the salvaged object is located in the center of the hull, which is relatively stable and not prone to capsizing risks. It also has low requirements for ballast water and other adjustments, and a simple cabin division structure, which is conducive to reducing the length of the lever arm during the lifting process, reducing the lifting bending moment, reducing the possibility of capsizing and reducing the difficulty of adjusting the ballast water system.

[0017] 3. The crane is a ring-shaped crane. The main beam of the crane can rotate around the ring base, and the crane can walk on the main beam, so as to achieve fine control of the rotation and translation of the hoisted object within the moon pool, meeting various lifting posture requirements: for example, when installing the upper module of an offshore oil drilling platform or an offshore substation at sea, the floating device can be used to lift the upper module to the conductor frame fixed on the seabed, and the upper and lower parts of the platform can be accurately connected through the rotation and translation of the crane.

[0018] 4. It can complete underwater salvage and underwater testing tasks with specific requirements, such as launching manned submersibles such as the Jiaolong.

[0019] 5. An arch-type connecting bridge is set at the bow of the hull to achieve barrier-free connection between the middle moon pool and the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the floating lifting device of the present invention.

[0021] Figure 2 It is a side view of the floating lifting device of the present invention.

[0022] Figure 3 It is an axonometric view of the floating lifting device of the present invention.

[0023] Figure 4 It is a schematic diagram of the underwater lifting of an object lifted by the floating lifting device of the present invention.

[0024] Figure 5It is a schematic diagram of underwater translation of a hoisted object by the floating lifting device of the present invention.

[0025] Figure 6 It is a schematic diagram of underwater rotation of a hoisted object by a floating lifting device of the present invention.

[0026] In the figure: 1-catamaran; 2-ring crane; 3-ring beam; 4-main beam; 5-crane; 6-support base; 7-connecting bridge; 8-mooring equipment; 9-control room. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figure 1-3 As shown, the floating lifting device for underwater salvage and lifting test of the present invention comprises a catamaran 1 and a ring crane 2. The catamaran comprises two monohulls, and the two monohulls are connected by a connecting bridge 7. The connecting bridge 7 is respectively connected to the bow or stern of the two monohulls. The catamaran is used as the salvage lifting hull, which has strong wind and wave resistance and relatively stable water surface posture, and can perform salvage operations in severe sea conditions.

[0029] A support base 6 is provided in the middle of the catamaran 1, and the annular crane 2 is installed on the support base 6. The specific installation structure is as follows: the annular crane 2 includes an annular beam 3, a main beam 4 and a crane 5. The annular beam 3 is installed on the support base 6, the main beam 4 rotates on the annular beam 3 through rollers, and the crane 5 moves horizontally on the main beam 4 through rollers. The main beam of the crane is installed on the annular support base, the main beam can rotate around the annular support base, and the crane can walk on the main beam, so that the hoisted object can move in full coverage within the range of the annular support base. Since the support base 6 is fixedly connected to the catamaran 1, the annular crane 2 is installed near the middle of the catamaran 1. During the lifting process, the hoisted object is always located on the plumb line of the ship's buoyancy center, which is beneficial to the ship's attitude control and is not prone to heeling and pitching. The crane 5 can move horizontally on the main beam 4 through rollers, and the main beam 4 can rotate on the annular support base through rollers, so as to achieve the attitude adjustment of the object in the entire annular base.

[0030] A control room 9 is also connected between the two monohulls, and the control room 9 is used to control the crane. In this embodiment, the control room 9 is arranged at a position opposite to the connecting bridge 7. For example, when the connecting bridge 7 is connected to the bows of the two monohulls, the control room 9 is connected to the sterns of the two monohulls to maintain the balance between the two monohulls.

[0031] As a preferred embodiment of the present invention, the connecting bridge 7 is an arch bridge structure, which is convenient for towing the hoisted object into and out of the "U-shaped" floating body between the two monohulls and the control room 9. The moon pool structure in the middle of the catamaran is equipped with a flatbed truck to facilitate the installation and recovery of the hoisted or salvaged objects by the lifting personnel.

[0032] The working mode of the floating lifting device used for underwater salvage and lifting test of the present invention is as follows:

[0033] When an object needs to be salvaged or hoisted, the catamaran 1 is first driven to a designated area, and the hull is moored to the target sea area at four points by dropping anchors using four mooring devices 8. The crane 5 is operated in the control room 9 to retract and release the wire cable to achieve the lifting of the hoisted object. Figure 4 As shown, the crane 5 is controlled to move horizontally along the main beam 4 to achieve horizontal movement of the suspended object, such as Figure 5 As shown, the main beam 4 is controlled to rotate along the annular beam 3 to realize the rotation of the suspended object, as shown in FIG. Figure 6 shown.

Claims

1. A floating lifting device for underwater salvage and lifting test, characterized in that: It comprises a catamaran and an annular crane. The catamaran comprises two monohulls, which are connected by a connecting bridge. A supporting base is arranged in the middle of the catamaran, and the annular crane is installed on the supporting base.

2. The floating lifting device for underwater salvage and lifting test according to claim 1 is characterized in that: The ring crane comprises a ring beam, a main beam and a crane, wherein the ring beam is installed on a supporting base, the main beam rotates on the ring beam through rollers, and the crane moves horizontally on the main beam through rollers.

3. The floating lifting device for underwater salvage and lifting test according to claim 1 is characterized in that: The connecting bridge is respectively connected to the bow or stern of the two monohulls.

4. The floating lifting device for underwater salvage and lifting test according to any one of claims 1 to 3, characterized in that: A control room is also connected between the two monohulls.

5. The floating lifting device for underwater salvage and lifting test according to claim 4 is characterized in that: The connecting bridge is an arch bridge structure.

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