Method for hoisting large-size workpiece in ordinary plant and hydraulic jacking equipment thereof

Abstract

The invention relates to method for hoisting a large-size workpiece in an ordinary plant and hydraulic jacking equipment thereof. The invention is characterized in that hydraulic lifting devices of a hydraulic jacking system are erected above hydraulic jacking towers through a hoisting beam; the equipment is lifted to a platform height by the hydraulic lifting devices and then sent above a foundation, and the jacking towers are lowered to enable the equipment to take place; a hook used in the combined hoisting beam is connected with a hook beam through a two-way pin shaft, and the hook can rotate to realize rotating operations of a stator. The hydraulic jacking equipment comprises four hydraulic jacking towers, four hydraulic lifting devices, the combined hoisting beam, two tracks and a control board, wherein the four hydraulic jacking towers are respectively arranged above the two tracks to form a framework structure; sectional telescopic mechanisms are arranged in the hydraulic jacking towers, and telescopic control ends of the sectional telescopic mechanisms are connected with an output end of a hydraulic drive mechanism; the lower parts of the hydraulic jacking towers are provided with travelling wheels; and drive input ends of the travelling wheels are connected with a drive output end of a motor. The invention organically combines the hydraulic jacking system with a working principle integrating machines, electricity and liquid and has the characteristics of stable action, safety, reliability, large hoisting weight, convenient mounting and dismounting and obvious economic benefit.

Description

technical field [0001] The invention relates to a method for hoisting a large workpiece in an ordinary factory building and its hydraulic jacking equipment. The maximum rated lifting capacity of the hydraulic jacking system used in this construction method is 700t, which is not only applicable to the stators, The hoisting operation for the installation and maintenance of large-scale equipment such as gas turbines and main transformers can also be applied to the hoisting operations of similar large-scale equipment in petroleum, chemical and other industries. It belongs to the technical field of hydraulic hoisting equipment. Background technique [0002] In the prior art, it is often necessary to hoist large workpieces with a weight of 350 tons to 700 tons in an ordinary factory building. For example, the generator stator is the largest piece of equipment in the power plant. The weight of the stator of the 600MW generator set is about 350t, and the weight of the generator sta...

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Problems solved by technology

In comparison, the operation method of lifting the stator of the generator by strengthening the crane has a shorter hoisting period. It takes about 7 days from construction preparation to the stator in place, but the cost is relatively high. Taking a 600MW unit as an example, The total cost of strengthening the two cranes is about 400,000 yuan. In addition, the structure of the main workshop must be appropriately increased, which increases the cost. Moreover, the method of crane reinforcement and lifting can only hoist a specific stator. Reinforcing the driving and enlarging the structure of the main workshop will inevitably result in a waste of social resources

[0004] Another method of hoisting the stator of the generator is to use the hoisting frame hoisting method. This method is to build a fixed hoisting structure on the side of the main workshop from zero meters to the turbine operation floor, and then lay tracks and movable hoisting frames. The stator is hoisted by a fixed The frame starts to lift, and after reaching the height of the platform on the operating floor, it is hauled by the movable frame to the top of the foundation; this method requires the construction of pile foundations, and the installation period of the hoisting structure is high, and the cost is high, and the rotation of the stator cannot be conveniently realized during the operation process. In addition, the safety is not high, and it is a relatively backward construction method.

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