Construction method of hoisting stator with hydraulic lifting device and gantry frame

Abstract

The invention discloses a construction method for hoisting a stator by cooperation of a hydraulic lifting device and a portal frame. The method comprises the following steps that firstly, a hoisting device formed by the hydraulic lifting device and the portal frame is installed, then the device is hoisted and installed through the installed hoisting device, a track beam is laid between a stator platform and a hoisting object, the portal frame is installed on the track beam, then the hydraulic lifting device is arranged on the portal frame, after the stator is lifted by the hydraulic lifting device, the portal frame moves along the track beam to the position of the stator in place under the action of a thruster, and then the hydraulic lifting device is operated to drop the stator to complete the position. According to the construction method, the space is narrow, so that the heavy objects in factory building can be hoisted in place without a large-tonnage hoisting device; and the vertical lifting, descending, front-back moving and rotating operation of the heavy objects can be completed.

Description

Technical field: [0001] The invention relates to the field of power supply and transformation construction, in particular to a construction method for hoisting a stator with a hydraulic lifting device and a gantry frame. Background technique: [0002] As the capacity of the thermal power generator assembly increases, the volume and weight of the generator stator gradually increases. The stators of the thermal power generating units above 300MW are all above 200t, 300t or 400t. , the space of the factory building is low and narrow, and the machinery used for construction and maintenance is only designed with a 75t crane, and the weight of the stator is about 230t. The crane is far from meeting the hoisting and positioning requirements of the stator. The hydraulic lifting device hangs the stator, and the driving girder is also unbearable; if the equipment needs to be turned before it is in place, it will add greater difficulty to the installation of the equipment. [0003] Th...

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Problems solved by technology

[0002] As the capacity of the thermal power generator assembly increases, the volume and weight of the generator stator gradually increases. The stators of the thermal power generating units above 300MW are all above 200t, 300t or 400t. , the space of the factory building is low and narrow, and the machinery used for construction and maintenance is only designed with a 75t crane, and the weight of the stator is about 230t. The crane is far from meeting the hoisting and positioning requirements of the stator. The hydraulic lifting device hangs the stator, and the driving beam is also unbearable; if the equipment needs to be turned before it is in place, it will add more difficulty to the installation of the equipment

[0003] The more common method recently is to arrange hydraulic lifting devices on the two cranes to lift the stator, but this requires more and more strength for the cranes. In order to lift the stator once, power generation companies have to strengthen the beams when customizing the cranes. reinforcement, the strength of the foundation of the driving track should also be increased, which greatly increases the project cost

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