250-T crane steel wire rope ground pre-tightening method
A technology of steel wire ropes and cranes, which is applied to hoisting devices, cranes, clockwork mechanisms, etc., can solve problems such as high construction risks and difficult operations, and reduce construction safety risks. The method is simple and convenient, and the cost of equipment is low. Effect
Active Publication Date: 2020-03-17
SHANGHAI ZHENHUA HEAVY IND
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a ground pretensioning method for a 250T gram crane wire rope, which can solve the problems that the general gram crane uses large-scale hoisting equipment for preloading, high construction risk and difficult operation
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[0029] The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the described examples.
[0030] Such as Figure 1 to Figure 3 A 250T gram crane wire rope ground preloading method is shown, the specific preloading steps are as follows: including S1: main hook wire rope preloading; S2: auxiliary hook wire rope preloading; S3: luffing wire rope preloading; S4: dragging The wire rope is pre-tensioned.
[0031] S1: Main hook wire rope pretension:
[0032] S1.1: Each mechanism has been debugged. Before the wire rope is wound, all relevant inspections of each mechanism on the winch have been completed, and it can cooperate with the wire rope winding and tensioning action.
[0033] S1.2: Arrange steel plates and tensioning devices on one side of the crane. The opening center of the reel of the tensioning device is directly below the center line of the boom frame, whi...
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The invention relates to a 250-T crane steel wire rope ground pre-tightening method. The method is characterized by specifically comprising the pre-tightening steps of 1, pre-tightening a main hook steel wire rope; 2, pre-tightening an auxiliary hook steel wire rope; 3, pre-tightening a variable-amplitude steel wire rope; and 4, pre-tightening a dragging steel wire rope. In the 250-T crane factorydebugging stage, a pre-tightening device is adopted to tighten the steel wire ropes on winding drums directly from redirecting pulleys at the head of a herringbone frame, all the steel wire ropes arewound on the winding drums and fixed in place, and after a crane is assembled in place in the later period, guide ropes are directly adopted to pull out the wound and installed steel wire ropes in place. The method is simple and convenient to implement, the use cost of equipment is low, and the operation is easy; and compared with the general assembly site construction, the risk of overhead operation is reduced, the time of overhead operation is shortened, the use cost of large equipment is reduced, and the construction safety risk is reduced.
Description
technical field [0001] The invention relates to the field, in particular to a ground pretensioning method of a 250T gram crane wire rope. Background technique [0002] The 250t gram crane is installed on the 60m high hull cylinder, the position is high, the layout and operation of the wire rope pretensioning device is difficult, large lifting equipment is required, and the construction safety risk is high; therefore, a low construction risk, wire rope pretensioning operation is required The low-difficulty method is used to pre-tighten the wire rope of the Crane Crane on the ground. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a ground pretensioning method for a 250T gram crane wire rope, which can solve the problems that the general gram crane uses large-scale lifting equipment for preloading, high construction risk and difficult operation. [0004] In order to solve the above technical problems, the technica...
Claims
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IPC IPC(8): B66C23/52B66C23/62B66D1/50
CPCB66C23/52B66C23/62B66D1/50
Inventor 王小彬孙泳涛陈飞盛金金夏彩来
Owner SHANGHAI ZHENHUA HEAVY IND