Positioning device for secondary pier falling of ship in dock

Abstract

The invention provides a positioning device for floating and secondary pier falling of a ship in a dock in a ship building process, belonging to the field of ship manufacturing. The positioning device comprises a limiting device and a furling device; the limiting device is arranged at the bottom of the dock, is fixedly connected with an inner wall of a dock wall and is used for limiting the position of the ship; and the furling device is connected with the ship and the dock wall and is used for dragging and furling the ship. According to the invention, the problems of low safety coefficient, difficulty in guaranteeing positioning precision and the like of the traditional ship moving method are solved, the positioning device has the advantages of simplicity for operation, rapidness in positioning and the like, the limiting device and the furling device can be flexibly distributed according to the size of the ship, are easily mounted and dismounted and cannot occupy spatial positions of the dock, and the positioning device can be widely applied to the field of ship manufacturing.

Description

technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a floating and secondary pier positioning device in a dock during shipbuilding. Background technique [0002] In order to improve the utilization rate of the dock, the series of ships often adopt the two-and-a-half-line serial construction method during the construction process. For shipyards that undertake the construction of more ship types, half-ship construction will also occur during the construction of ships in different docking periods. Because the construction period is different, the completed ship must be undocked first, and the unfinished ship must be floated first, and then the pier will continue to be built. All of these need to control the positioning accuracy of the ship and the pier while the hull is floating. The back of the pier meets the accuracy requirements of the pier, or meets the construction accuracy requirements of the half-ship close-up. [0003]...

AI Technical Summary

Problems solved by technology

[0004] 1. Traditional vertical winches and winches have large inertia when positioning, and it is difficult to control the accuracy

Moreover, due to the wide dock width, one side of the hull is far away from the dock wall, and the wire rope connection is longer, resulting in a low safety factor

[0005] 2. If figure 1 As shown, when there are other ships in the dock, especially when they are side by side, it is easy to cause interference during positioning; The four cables in the middle area of ​​docking will interfere with each other, or the cables will collide with the side-by-side hull structure / equipment / outfitting, and the length of the cables on the left and right sides of each half-ship is extremely asymmetrical, which is extremely unfavorable for the adjustment and positioning accuracy of the half-ship. Positioning accuracy is difficult to guarantee

[0006] However, the positioning devices for floating in the dock and the second falling pier method announced by patent 200410066741.6 and patent 200810039748.7 are all fixed, and basically float and drop pier in the original position. For two and a half ships underwater, such as the company's construction The 50,000-ton semi-submersible ship, the two and a half ships are built in different positions, after being floated in the dock, they are positioned by dragging, and then put on the pier again. The above-mentioned patent method is obviously not applicable, and the "ship The positioning device in the method of controlling the positioning accuracy of the ship floating in the dock and the secondary pier falling needs to be manufactured and installed according to the shape of the hull, which is not universally applicable. In addition, the disassembly and assembly of the positioning device in the above two patent methods still takes man-hours , so a positioning device with wide application and easy disassembly is more advantageous

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