A Method for Hoisting Pile Legs Using the Principle of Secondary Leverage

Abstract

The invention relates to the technical field of offshore platform construction, in particular to a pile leg hoisting method using a secondary lever principle. According to the hoisting method, pile legs are always in a vertical state during hoisting and have good balance, and the height of a hoisting workpiece is higher than a gantry crane beam. Besides, by the adoption of the pile leg hoisting method, the pile legs are mounted in the slipway stage in advance, marine installation required after a platform is the sea is avoided, the mounting accuracy is improved, and the mounting difficulty islowered greatly; and existing crane resources are adopted completely, leasing of large crane equipment is avoided, the rental cost is saved, and the ship construction cost is reduced greatly.

Description

technical field

[0001] The invention relates to the technical field of offshore platform construction, in particular to a pile leg hoisting method using the principle of secondary leverage. Background technique

[0002] The legs are an important component of the jack-up platform, and its ascent and descent depend on the legs. In order to pursue a larger operating water depth range for jack-up platforms, generally the pile legs are relatively high, and the height of most platforms is above 100 meters. However, due to weather conditions and considering the impact of earthquakes, the height of the gantry cranes of general shipbuilding enterprises is within 90 meters. Therefore, the part of the pile leg structure whose height exceeds the height of the gantry crane generally cannot be installed on the dock or berth. Instead, a large floating crane is used for water hoisting after the platform is launched. However, since the floating crane will swing up and down with the tide le...

Examples

Embodiment 1

[0026] Such as figure 1 As shown, this embodiment provides a method for hoisting the pile leg 1 using the principle of secondary leverage, including the following steps:

[0027] 1) Make a horizontally installed hoisting tool 2, and connect one end of the hoisting tool 2 to the pile leg 1 to be hoisted, the main hoisting ring 3 is arranged on the end of the hoisting tool 2 close to the pile leg 1, and the hoisting tool 2 The other end is provided with an auxiliary suspension ring 4, and a counterweight suspension ring 5 is provided below the auxiliary suspension ring 4;

[0028] 2) The first hoisting trolley 6 and the second hoisting trolley 7 are respectively arranged on the crossbeam 13 of the gantry crane, and the both sides of the first hoisting trolley 6 are respectively connected with the first suspension hook 8 and the second suspension hook 9. The second hoisting trolley 7 is connected with a third suspension hook 10, the second suspension hook 9 is connected with the...

technical field

[0001] The invention relates to the technical field of offshore platform construction, in particular to a pile leg hoisting method using the principle of secondary leverage. Background technique

[0002] The legs are an important component of the jack-up platform, and its ascent and descent depend on the legs. In order to pursue a larger operating water depth range for jack-up platforms, generally the pile legs are relatively high, and the height of most platforms is above 100 meters. However, due to weather conditions and considering the impact of earthquakes, the height of the gantry cranes of general shipbuilding enterprises is within 90 meters. Therefore, the part of the pile leg structure whose height exceeds the height of the gantry crane generally cannot be installed on the dock or berth. Instead, a large floating crane is used for water hoisting after the platform is launched. However, since the floating crane will swing up and down with the tide le...

Examples

Embodiment 1

[0026] Such as figure 1 As shown, this embodiment provides a method for hoisting the pile leg 1 using the principle of secondary leverage, including the following steps:

[0027] 1) Make a horizontally installed hoisting tool 2, and connect one end of the hoisting tool 2 to the pile leg 1 to be hoisted, the main hoisting ring 3 is arranged on the end of the hoisting tool 2 close to the pile leg 1, and the hoisting tool 2 The other end is provided with an auxiliary suspension ring 4, and a counterweight suspension ring 5 is provided below the auxiliary suspension ring 4;

[0028] 2) The first hoisting trolley 6 and the second hoisting trolley 7 are respectively arranged on the crossbeam 13 of the gantry crane, and the both sides of the first hoisting trolley 6 are respectively connected with the first suspension hook 8 and the second suspension hook 9. The second hoisting trolley 7 is connected with a third suspension hook 10, the second suspension hook 9 is connected with the...

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