CN106428440A - Hinged truss type twin-hull floating crane - Google Patents

Abstract

The invention discloses a articulated truss type catamaran crane ship, which comprises a left hull and a right hull. Both the left hull and the right hull are provided with a hanger platform, and a hinge support is installed on the hanger platform. The hinge support of the hull and the right hull is hinged with the front hanger and the rear hanger through the toe of the door frame. A block of pulleys is installed on the upper end of the frame, and the block of pulleys is respectively connected with the winch by cables. In the articulated truss type catamaran crane ship of the present invention, the lower end of the hanger is hinged with the left and right hulls, so that when the hull rolls greatly, the hanger can still be kept stable, and large torque can be avoided at the connection between the lower end of the hanger and the hull; There is a large space under the frame, equipped with multiple hooks, multi-point lifting, easy to lift large modules, and the bottom of the hanger can be easily converted into a working platform for installation and maintenance of risers and tendons, piling and other operations.

Description

An articulated truss catamaran

technical field

The invention relates to an articulated truss type catamaran crane ship, which belongs to the field of ships.

Background technique

As the jacket platforms and subsea production systems in early service enter the decommissioning period, these decommissioned jacket platforms and subsea production systems need to be dismantled. The superstructure of the jacket platform is usually high and heavy, and it is difficult to dismantle it. In addition, large-scale water structures are gradually constructed in modules, and the modules are finally assembled at the dock or at sea. These modules typically weigh several thousand tons and vary widely in shape. A kind of operation platform capable of stable operation, strong lifting capacity and wide operation range is needed in the dismantling and installation operations of these structures. Most of the existing crane ships are single-hull structures, and some of them use single hulls and side pontoons to form a combined structure. In order to increase the lifting radius, the crane ship will arrange the boom at the bow or stern of the ship. When this kind of crane ship lifts large heavy objects, it will cause a large pitch or heel moment. In order to balance the hull, the ballast water distribution in the hull must be adjusted. During the lifting process, there will be a large stress concentration at the connection between the boom and the hull, so the connection between the lower end of the boom and the hull needs to be structurally strengthened.

Catamarans usually have good seakeeping, and catamaran arrangements are widely used on ships with high seakeeping requirements, such as catamaran passenger ships and catamaran survey ships. Existing crane ships also adopt double-hull arrangement or similar double-hull arrangement.

After retrieval, it was found that the double-hull movable full-rotation crane disclosed in the patent document with the publication number CN 102642601B adopts a double-hull structure, and uses a fixed deck at the end of the hull to connect the two hulls. A full-slewing crane, the crane uses a hydraulic crawling mechanism to move along the running track of the crane on the left and right decks. This solution uses two cranes, which can only provide two lifting points, and it is not suitable for lifting large modules. In addition, when lifting heavy objects inside the two ships, a large bending moment will be generated on the deck, which is not good for the strength of the deck. The catamaran used for marine engineering disclosed in the patent document with the publication number CN102530189A adopts two parallel hulls with adjustable spacing as the main body, slideways are set at the rear of the decks of the two hulls, and two parallel boxes span the two hulls above the hulls. The hull can slide back and forth along the track. In this scheme, the two boxes are placed horizontally on the base. When the distance between the two ships is large, a large-span simply supported beam is formed. If the super-heavy module is lifted, the box needs higher strength, resulting in more materials for the box structure and excessive structure. In addition, when the hull rolls greatly, it will cause excessive force on one side of the bracket below the box, which is likely to cause structural damage.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a articulated truss type catamaran crane ship, which has strong lifting capacity, less structural steel, good weather adaptability, stable operation, and high performance. many.

Technical solution: In order to solve the above technical problems, an articulated truss type catamaran crane ship of the present invention includes a left hull and a right hull, both of which are provided with a hanger platform, and on the hanger platform Hinged support is installed, and the front hanger and rear hanger are hinged on the hinge support of the left and right hulls through the toe of the mast. Both the front hanger and the rear hanger include the mast. A winch is installed on the top, and a pulley block is installed on the upper end of the door frame, and the pulley block is respectively connected with the winch through cables.

Preferably, the portal frame is welded by two kinds of steel pipes with different pipe diameters, and multiple horizontal supports and oblique supports are arranged on the portal frame to form multiple triangles.

Preferably, vertical fenders are provided on the inner sides of the left hull and the right hull.

Preferably, the vertical fenders include twenty cylindrical vertical rubber fenders, and the cylindrical vertical rubber fenders are sequentially fixed on the sides by bolts.

As a preference, the hinge ears are welded above the hinge support, the lower end of the single ear plug is flat, and there is a round hole on it, which is coaxial and of the same diameter as the round hole on the hinge ears, and the hinge pin passes through the hinge ears and the single ear. Ear plug, the hinge pin is a nail-shaped structure, the diameter of the nail cap is larger than the diameter of the above-mentioned opening, the nail point is limited by the pin after passing through the ears of the hinge, the upper end of the single-ear plug is a round tube, and its outer diameter is the same as the inner diameter of the mast toe , with a step below the round tube.

Preferably, the pulley block includes a pulley lug, the pulley lug is welded to the mast, and is longitudinally centered, the upper pulley is connected under the pulley lug, the lower pulley is connected to the upper pulley through a lifting cable, and the lifting cable is connected between the lower pulley and the upper pulley. There are 3-4 circles between the pulleys on the pulley, one end of the lifting steel cable is fixed on the upper pulley, the other end is connected to the winch, and a hook is installed under the lower pulley, and the hook is fastened by the upper bolt.

Preferably, the fore and aft ends of the left hull and the right hull are inclined.

Beneficial effects: the articulated truss catamaran crane ship of the present invention has the following advantages:

1. The lower end of the hanger is hinged with the left and right hulls. When the hull rolls greatly, the hanger can still be stable and avoid a large torque at the connection between the lower end of the hanger and the hull.

2. The bow and stern of the main hull of the left hull and the right hull are inclined, which is beneficial to reduce the resistance during towing.

3. The front hanger and rear hanger adopt truss structure, which has high structural strength, less material and strong lifting capacity.

4. The double-hull arrangement is adopted, which has excellent seakeeping performance. In addition, the hulls on both sides play a certain role as a barrier to transverse waves, reducing the wave height in the moon pool between the two ships, which is conducive to carrying out operations.

5. The space under the hanger is large, equipped with multiple hooks, multi-point lifting, easy to lift large modules, and the bottom of the hanger can be easily converted into a working platform for installation and maintenance of risers and tendons, piling and other operations.

6. Two hangers separated from the front and back are used to facilitate the installation of hangers.

Description of drawings

Fig. 1 is the overall structure diagram of the present invention.

Figure 2 is a top view of the present invention.

Figure 3 is a rear view of the present invention.

Figure 4 is a side view of the present invention.

Fig. 5 is a structural diagram of the left and right hulls.

Figure 6 is a structural diagram of the rear hanger.

Figure 7 is a structural diagram of the hinge support.

Fig. 8 is a block diagram of a pulley.

In the figure: left hull 1, right hull 2, front hanger 3, rear hanger 4, left hull main hull 11, left hull deckhouse 12, left hull hanger platform, left hull vertical fender, right hull main hull 21. Right hull deckhouse 22, mast 31, hinge support 32, mast toe 33, first winch platform 34, first winch 35, pulley block 36, second winch platform 37, second winch 38, hinge ears 322, single-ear plug 324, hinge pin 323, pin 325, pulley lug 361, upper pulley 362, lifting steel cable 363, lower pulley 364, suspension hook 365.

detailed description

As shown in Figures 1 to 8, a articulated truss type catamaran crane ship of the present invention includes a left hull 1 and a right hull 2, and a hanger platform 13 is provided on the left hull 1 and the right hull 2, On the hanger platform 13, a hinge support 32 is installed, and on the hinge support 32 of the left hull 1 and the right hull 2, the front hanger 3 and the rear hanger 4 are hinged by the door frame toe 33, and the front hanger 3 and the rear hanger 3 are hinged. Hanger 4 all comprises door frame 31, and winch is all installed on two hanger platforms 13, left and right, and two block pulleys 36 are installed on the upper end of door frame 31, and each block pulley 36 is connected with winch respectively by cable, and cable is Heavy Steel Cable 363. The left hull 1 and the right hull 2 are placed parallel to the longitudinal direction of the hull. The bow and stern ends of the left hull 1 and the right hull 2 are inclined, and there is a certain distance between the two hulls to form a rectangular moon pool with front and rear openings. The left hull 1 and the inner side of the starboard hull 2 are provided with vertical fenders 14, the vertical fenders 14 include twenty cylindrical vertical rubber fenders 14, and the cylindrical vertical rubber fenders 14 are sequentially fixed on the side by bolts The front hanger 3 and the rear hanger 4 are installed above the left hull 1 and the right hull 2, placed in parallel along the left hull 1 and the right hull 2, across the left hull 1 and the right hull 2, and the front hanger 3 is on the left hull 1 and the middle front of the right hull 2, and the rear hanger 4 is at the middle and rear of the left hull 1 and the right hull 2; the front hanger 3 has the same structure as the rear hanger 4, but the installation directions are different, and the large end of the front hanger 3 is on the left hull 1, the small end is on the right hull 2; the large end of the rear hanger 4 is on the right hull 2, and the small end is on the left hull 1; there is a certain distance between the front hanger 3 and the rear hanger 4 in the longitudinal direction of the hull, and the distance is 1.5 Times front hanger 3 small end width.

In the present invention, the gantry 31 is welded by two kinds of steel pipes with different pipe diameters. A plurality of horizontal supports and oblique supports are arranged on the gantry 31 to form a plurality of triangles. The horizontal supports are Large-diameter steel pipes, the inner and outer diagonal braces of the door frame 31 and the horizontal and vertical rods connected with the toes are large-diameter steel pipes; a toe is respectively installed at the front and back of the large end of the door frame 31, and the diagonal braces connected with these two toes are large diameter steel pipes. Diameter steel pipes; the diagonal braces below the crossbars of the pulley block 36 are large diameter steel pipes, and the remaining diagonal braces are small diameter steel pipes. The upper part of the winch platform is connected with the door frame 31 by two diagonal braces.

As shown in Figure 5, the left hull hanger platform is set on the deck of the left hull main hull 11, the center of the left hull hanger platform coincides with the center of the left hull main hull 11 decks, and the left hull deckhouse 12 is positioned at the end of the left hull main hull 11. The main hull 11 of the hull is installed with the left hull vertical fender near the side of the moon pool; the left hull vertical fender is composed of twenty cylindrical vertical rubber fenders, which are fixed on the side by bolts; the left hull 1 and the right hull 2 layout is basically the same, the difference is that the right hull deckhouse 22 is installed in the front end of the right hull main hull 21;

As shown in Figure 6, the gantry 31 is a truss-type gantry structure, three horizontal beams are arranged on the upper part of the gantry 31, and three horizontal frames are respectively arranged on the lower part of the gantry 31. A gantry toe 33 is connected, and the small end below is connected with two gantry toes 33, and each toe 33 is installed on the hinge support 32; Each hinge support 32 is installed on the hanger platform 13, and is horizontally centered. The first winch platform 34 is arranged in the middle and lower part of the large end of the portal frame 31, which is supported by diagonal braces and horizontal braces. The first winch 35 is installed in the middle part of the first winch platform 34; Supported by diagonal braces and horizontal braces, the second winch 38 is installed in the middle of the second winch platform 34; the two portal toes 32 on the outer side below the large end of the portal frame 31 are supported by two diagonal braces; the four doors below the large end of the portal frame 31 Frame toe 33 and two gantry toes 33 below the door frame 31 small ends are all connected along the ship's length direction with a large-diameter steel pipe, to keep the spacing between door frame toes 33;

As shown in Figure 7, the hinge double ear 322 is welded on the top of the hinge support 32, and the lower end of the single ear plug 324 is flat with a round hole above. The circular holes are coaxial and have the same diameter. The hinge pin 323 passes through the above two holes. The hinge pin 323 is a nail-shaped structure. The diameter of the nail cap is greater than the diameter of the above-mentioned opening. position, to prevent the hinge pin 323 from slipping; the upper end of the single-ear plug 324 is a round tube, the outer diameter of which is the same as the inner diameter of the mast toe 33, and there is a step below the round tube.

As shown in Figure 8, the pulley lug 361 is welded below the vertical horizontal pipe at the top of the door frame 31, and is centered longitudinally. The heavy steel cable 363 winds 3-4 turns between the pulleys on the lower pulley 364 and the upper pulley 362. One end of the lifting steel cable 363 is fixed on the upper pulley 362, and the other end is connected to the winch. A suspension hook 365 is installed below the lower pulley 364 to hang The hook 365 is fastened by the upper end bolt and is detachable.

An implementation example of the present invention: the left hull 1 and the right hull 2 are placed in parallel at a certain distance, and a rectangular moon pool with front and rear openings is formed inside, the front hanger 3 and the rear hanger 4 span the left hull 1 and the right hull 2, and the front hanger Frame 3 and rear hanger 4 are parallel. Left hull main hull 11 is identical with right hull main hull 21 structures, and left hull deckhouse 12 is at left hull 1 rear portion, and right hull deckhouse 22 is at right hull 2 fronts. Same as the right hull, a hanger platform 13 is set on the deck of the left hull 1, and multiple vertical fenders 14 are set on the side near the moon pool. The front hanger 3 and the rear hanger 4 have the same structure, which is a door-shaped structure. The two "door frames" are different in size. The installation directions of the front hanger 3 and the rear hanger 4 are opposite: the big end of the front hanger 3 and the small end of the rear hanger 4 On the left hull 1, 3 small ends of the front hanger and 4 large ends of the rear hanger are on the right hull 2. The main frame of the rear hanger 3 is a door frame 31, the lower end of the door frame 31 is connected with a plurality of door frame toes 33, the bottom of the door frame toes 33 is installed on the hinge support 32, and there are four coaxial hinges below the big end of the door frame 31. Bearing 32, there are two coaxial hinge bearings 32 below the door frame 31 small end. The first winch platform 34 is arranged at the large end of the door frame 31, and the first winch 35 is installed in the center on the first winch platform 34; Hinge bearing 32 bottoms are rectangular parallelepiped base 321, and above rectangular parallelepiped base 321 welding hinge ear 322, single ear plug 324 lower ends embed hinge ear 322, can rotate relatively around hinge pin 323, and pin 325 inserts hinge pin 323 little ends. The pulley block 36 is installed below the vertical horizontal bar at the top of the door frame 31. The upper end of the pulley lug 361 is welded on the vertical horizontal bar at the top of the door frame 31, and the lower end is connected to the upper pulley 362. The upper pulley 362 is connected to the lower pulley 364 through the hoisting cable 363, and slides down A suspension hook 365 is installed below the wheel 364 .

When installing a large-scale module at sea, first drag the lifting vessel to the top of the barge, bind the four hooks 365 above the lifting vessel to the large-scale module on the barge firmly, and start the first winch 35 on the hanger 4 after starting And the other two winches on the second winch 35 and the front hanger 3, tighten the hoisting cables 363 on the pulley block 36, the large module is hoisted to a sufficient height, then this hoisting ship is dragged to the top of the installation position, positioned Accurately after, start four winches, loosen hoisting cable 363, large-scale module is put down to target position, after being installed, this hoisting ship is towed away. The operation sequence is opposite to the installation process when the offshore large-scale module is dismantled. During the operation, the left hull 1 and the right hull 2 will produce a certain rolling motion. At this time, the front hanger 3 and the rear hanger 4 will rotate relative to the left hull 1 and the right hull 2 around the axis of the hinge support 32 , reduce the front hanger 3 and the rear hanger 4 lower end torque, prevent the front hanger 3 and the rear hanger 4 from being damaged due to torsion.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A articulated truss type catamaran crane ship is characterized in that: it comprises a left hull and a right hull, the left hull and the right hull are all provided with a hanger platform, and a hinged support is installed on the hanger platform, On the hinge support of the left hull and the right hull, the front hanger and the rear hanger are hinged through the toe of the door frame. Both the front hanger and the rear hanger include the door frame, and winches are installed on the left and right hanger platforms. A block of pulleys is installed on the upper end of the door frame, and the block of pulleys is respectively connected with the winch through cables. 2. The articulated truss type catamaran crane ship according to claim 1, characterized in that: the portal frame is welded by steel pipes of two different pipe diameters, and a plurality of horizontal supports and oblique supports are arranged on the portal frame, Form multiple triangles. 3. The articulated truss catamaran crane ship according to claim 1, characterized in that vertical fenders are provided on the inner sides of the left hull and the right hull. 4. The articulated truss catamaran crane ship according to claim 3, characterized in that: the vertical fenders include twenty cylindrical vertical rubber fenders, and the cylindrical vertical rubber fenders are sequentially formed by bolts. fixed on the side. 5. The articulated truss type catamaran crane ship according to claim 1, characterized in that: the hinge ears are welded above the hinge support, and the lower end of the single ear plug is flat with a round hole on it, which is connected to the hinge ears. The round holes are concentric and have the same diameter. The hinge pin passes through the hinge ears and the single ear plug. The hinge pin is a nail-shaped structure. The diameter of the nail cap is larger than the diameter of the above-mentioned opening. The upper end of the single-ear plug is a round tube whose outer diameter is the same as the inner diameter of the mast toe, and there is a step below the round tube. 6. The articulated truss type catamaran crane ship according to claim 1, characterized in that: the pulley block includes pulley lugs, the pulley lugs are welded to the mast, centered in the longitudinal direction, the upper pulley is connected to the lower part of the pulley lugs, and the sliding The wheel and the upper pulley are connected by a lifting cable. The lifting cable is wound 3-4 times between the pulleys on the lower pulley and the upper pulley. One end of the lifting cable is fixed on the upper pulley, and the other end is connected to the winch. Install the hook, and the hook is fastened by the upper end bolt. 7. The articulated truss type catamaran crane ship according to claim 1, characterized in that: the bow and stern ends of the left hull and the right hull are inclined.