Large floating crane structure

Abstract

The invention relates to a large floating crane structure. The large floating crane structure is characterized by comprising a floating crane mother ship, a cargo boom and a propeller strut, according to the crane structure, the lifting inclination angle of the lifting arm frame is small, the extension range of the lifting arm frame is large, the long-distance operation capacity of the floating crane is greatly improved, the lifting arm frame and the propeller strut in the structure of the large floating crane are both assembled in a modularized mode, the installation efficiency is high, and the cost is low; according to the large floating crane, the problems that a traditional large floating crane is small in hoisting range, and the included angle between the hoisting arm frame and the horizontal direction is large are solved.

Description

Technical Field

[0001] The invention relates to the technical field of floating cranes, and in particular to a large floating crane structure. Background Art

[0002] Floating cranes are important equipment used for marine engineering installation and lifting and installation. They are widely used in the installation and construction of offshore oil platforms, especially in the field of marine engineering lifting operations, such as the installation of offshore platforms, the maintenance of derricks, the installation of offshore wind power equipment, etc.; existing floating cranes are divided into offshore floating cranes and deep-sea floating cranes according to their uses. The lifting capacity of offshore floating cranes is not large, generally between 1,000 and 3,000 tons. The lifting capacity of installation floating cranes is also not large, and they are mainly used for the installation of port machinery equipment. The lifting capacity of deep-sea operations is relatively large, because the lifting capacity of the installation floating crane directly determines the construction capacity of the floating crane. At present, the largest floating crane in China has a lifting capacity of 12,000 tons. However, with the development of marine engineering, large-scale floating cranes are a trend. Marine engineering equipment is developing towards large-scale. Therefore, in the field of offshore installation, the original floating cranes can no longer adapt to the trend of large-scale marine engineering. The installation operation efficiency is too low, which seriously restricts the development of marine engineering. The present invention adapts to the trend of large-scale marine engineering and invents a floating crane with a low-inclination angle and a large arm span. The lifting distance is farther than that of the existing floating cranes, which greatly expands the operating range of the floating crane. What was previously impossible to install can now be installed. At the same time, it also greatly improves the installation efficiency, reduces the installation cost, and achieves greater economic benefits. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a large floating crane structure, which can solve the problems of large lifting inclination angle and small operating range of the lifting boom of a general floating crane.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a large floating crane structure, the innovation of which is: comprising a floating crane mother ship, a lifting boom and a herringbone; A hinged shaft seat for mounting a lifting boom is provided on the upper surface of the floating crane mother ship near one end; The tail end of the boom is provided with a pin hole, and the tail end pin hole of the boom is hingedly connected to the hinge shaft seat; a low angle of 16.65° is formed between the boom and the surface of the floating crane mother ship; a wire rope winding wheel group is installed at the top of the boom, and the top of the boom extends out of the end of the floating crane mother ship; the top of the boom is connected to the top of the herringbone through multiple groups of wire ropes and the wire ropes are kept parallel to the surface of the floating crane mother ship, and the boom, wire rope, herringbone and floating crane mother ship form a right-angle trapezoidal structure in the longitudinal direction; The herringbone frame is in the shape of a right triangle and is installed on one side of the boom on the floating crane mother ship; the herringbone frame includes a front leg, a diagonal brace and a rear leg, the bottom end of the front leg is welded to the clamping plate of the floating crane mother ship, and the front leg is arranged in an inclined shape; a diagonal brace connecting plate is welded to the front leg at the diagonal brace connection, and the diagonal brace connecting plate is welded to the front leg, and a hinged ear plate is arranged on the side of the diagonal brace connecting plate; the top side surface of the diagonal brace is hingedly connected to the diagonal brace connecting plate by a pin shaft to realize the simultaneous lifting and installation of the diagonal brace and the front leg; the top end of the diagonal brace is connected to the front leg The diagonal brace connecting plates are fixed by welding; the rear legs are welded and fixed perpendicular to the plywood of the floating crane mother ship; a herringbone connecting seat is arranged at the top of the rear legs, and one end of the herringbone connecting seat is welded and fixed to the top of the rear legs, and the other end of the herringbone connecting seat is welded and fixed to the top of the front legs, so as to realize the fixed connection between the front legs, the diagonal brace and the rear legs and the installation on the plywood of the floating crane mother ship; there are two groups of herringbone frames formed by the front legs, the diagonal brace and the rear legs, and the herringbone frames are arranged in an inclined shape with respect to the central axis direction of the floating crane mother ship, so as to realize the installation of the front legs on the floating crane mother ship in a trumpet shape when viewed from above.

[0005] Furthermore, a wire wheel set for installing steel wires is arranged between the top ends of the herringbone frame; and a connecting crossbeam is arranged between the front legs of the herringbone frame.

[0006] Furthermore, the angle between the front leg of the herringbone frame and the floating crane mother ship is 43°; the angle between the diagonal brace and the floating crane mother ship is 55°.

[0007] Furthermore, the length of the lifting jib is greater than 160m.

[0008] The advantages of the present invention are: 1) The large-scale floating crane of the present invention has a small lifting inclination angle of the lifting boom and a large extension range of the lifting boom, which greatly increases the long-distance operation capability of the floating crane. In addition, the lifting boom and the herringbone frame in the structure of the large-scale floating crane are assembled in a modular manner, which has high installation efficiency and low cost. The large-scale floating crane solves the problems of the traditional large-scale floating crane, that is, the lifting range is small and the angle between the lifting boom and the horizontal direction is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0010] Figure 1 The figure is a schematic structural diagram of a large floating crane of the present invention.

[0011] Figure 2 The present invention is a structural diagram of a lifting boom of a large floating crane.

[0012] Figure 3 The present invention is a side structural diagram of a herringbone frame of a large floating crane.

[0013] Figure 4 The present invention is a top view of the herringbone structure of a large floating crane. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figures 1 to 4 A large floating crane structure is shown, comprising a floating crane mother ship 1, a lifting boom 2 and a herringbone 3.

[0017] An articulated shaft seat 11 for mounting a lifting boom is provided on the upper surface of the floating crane mother ship 1 near one end.

[0018] A pin hole is provided at the tail end of the boom 2, and the pin hole at the tail end of the boom 2 is hingedly connected to the hinge shaft seat; a low angle of 16.65° is formed between the boom 2 and the surface of the floating crane mother ship 1, and the length of the boom 2 is greater than 160m; a wire rope winding wheel group is installed at the top of the boom 2, and the top of the boom 2 extends out of the end of the floating crane mother ship 1; the top of the boom 2 is connected to the top of the herringbone through multiple groups of wire ropes 4 and the wire ropes 4 are kept parallel to the surface of the floating crane mother ship, and the boom 2, wire ropes 4, herringbone 3 and the floating crane mother ship 1 form a right-angled trapezoidal structure in the longitudinal direction.

[0019] The herringbone frame 3 is in the shape of a right triangle, and is installed on the floating crane mother ship 1 on one side of the boom 2; the herringbone frame 3 includes a front leg 31, a diagonal brace 32 and a rear leg 33, the bottom end of the front leg 31 is welded to the clamping plate of the floating crane mother ship 1, and the front leg 31 is arranged in an inclined state; the front leg 31 is welded with a diagonal brace connecting plate at the connection of the diagonal brace 32, and the diagonal brace connecting plate is welded to the front leg 31, and a hinged ear plate is arranged on the side of the diagonal brace connecting plate; the top side of the diagonal brace 32 is hingedly connected to the diagonal brace connecting plate by a pin shaft to realize the simultaneous lifting and installation of the diagonal brace and the front leg 31; the top end of the diagonal brace 32 is connected to the diagonal brace on the front leg 31 The connecting plates are fixed by welding; the rear leg 33 is welded and fixed perpendicular to the clamping plate of the floating crane mother ship 1; a herringbone connecting seat is arranged at the top of the rear leg 33, and one end of the herringbone connecting seat is welded and fixed to the top of the rear leg 33, and the other end of the herringbone connecting seat is welded and fixed to the top of the front leg 31, so as to realize the fixed connection between the front leg 31, the diagonal brace 32 and the rear leg 33 and the installation on the clamping plate of the floating crane mother ship; there are two groups of herringbone frames formed by the front leg 31, the diagonal brace 32 and the rear leg 33, and the herringbone frames 3 are arranged in an inclined shape with respect to the central axis direction of the floating crane mother ship 1, so that the installation of the front leg 31 on the floating crane mother ship 1 is in a trumpet shape when viewed from above.

[0020] A wire wheel set for installing steel wires is arranged between the top ends of the herringbone frame 3; a connecting beam is arranged between the front legs 31 of the herringbone frame; the angle between the front legs of the herringbone frame 3 and the floating crane mother ship 1 is 43°; the angle between the diagonal brace 32 and the floating crane mother ship 1 is 55°.

[0021] The working principle of the invention is as follows: the lifting inclination angle of the lifting boom of the large floating crane is small, the extension range of the lifting boom is large, the long-distance operation ability of the floating crane is greatly increased, and the lifting boom and the herringbone frame in the structure of the large floating crane are both assembled in a modular manner, with high installation efficiency and low cost; the large floating crane changes the problems of the traditional large floating crane, that is, the lifting range is small and the angle between the lifting boom and the horizontal direction is large. Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A large floating crane structure, characterized in that: Includes floating crane mother ship, crane jib and herringbone; A hinged shaft seat for mounting a lifting boom is provided on the upper surface of the floating crane mother ship near one end; The tail end of the boom is provided with a pin hole, and the tail end pin hole of the boom is hingedly connected to the hinge shaft seat; a low angle of 16.65° is formed between the boom and the surface of the floating crane mother ship; a wire rope winding wheel group is installed at the top of the boom, and the top of the boom extends out of the end of the floating crane mother ship; the top of the boom is connected to the top of the herringbone through multiple groups of wire ropes and the wire ropes are kept parallel to the surface of the floating crane mother ship, and the boom, wire rope, herringbone and floating crane mother ship form a right-angle trapezoidal structure in the longitudinal direction; The herringbone frame is in the shape of a right triangle and is installed on one side of the boom on the floating crane mother ship; the herringbone frame includes a front leg, a diagonal brace and a rear leg, the bottom end of the front leg is welded to the clamping plate of the floating crane mother ship, and the front leg is arranged in an inclined shape; a diagonal brace connecting plate is welded to the front leg at the diagonal brace connection, and the diagonal brace connecting plate is welded to the front leg, and a hinged ear plate is arranged on the side of the diagonal brace connecting plate; the top side surface of the diagonal brace is hingedly connected to the diagonal brace connecting plate by a pin shaft to realize the simultaneous lifting and installation of the diagonal brace and the front leg; the top end of the diagonal brace is connected to the front leg The diagonal brace connecting plates are fixed by welding; the rear legs are welded and fixed perpendicular to the plywood of the floating crane mother ship; a herringbone connecting seat is arranged at the top of the rear legs, and one end of the herringbone connecting seat is welded and fixed to the top of the rear legs, and the other end of the herringbone connecting seat is welded and fixed to the top of the front legs, so as to realize the fixed connection between the front legs, the diagonal brace and the rear legs and the installation on the plywood of the floating crane mother ship; there are two groups of herringbone frames formed by the front legs, the diagonal brace and the rear legs, and the herringbone frames are arranged in an inclined shape with respect to the central axis direction of the floating crane mother ship, so as to realize the installation of the front legs on the floating crane mother ship in a trumpet shape when viewed from above.

2. A large floating crane structure according to claim 1, characterized in that: A wire wheel set for installing steel wires is arranged between the top ends of the herringbone frame; and a connecting crossbeam is arranged between the front legs of the herringbone frame.

3. A large floating crane structure according to claim 1, characterized in that: The angle between the front leg of the herringbone frame and the floating crane mother ship is 43°; the angle between the diagonal brace and the floating crane mother ship is 55°.

4. A large floating crane structure according to claim 1, characterized in that: The length of the lifting jib is greater than 160m.

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