High-precision and large-diameter flange steel pipe segmenting and track-change installation method

Abstract

The invention relates to a high-precision and large-diameter flange steel pipe segmenting and track-change installation device and method. The device comprises a support, a trolley track erected on the support, a transport trolley with universal wheels on the trolley track, and a lifting beam system arranged at a position in which two steel pipes are to be installed, wherein the trolley track consists of a first track and a second track, and the first track is vertical to an installation axis of the steel pipe; the second track is vertically intersected with the first track and is positioned on the installation axis of the steel pipe, and the support consists of a first support and a second support; the first track is erected on the first support, and the second track is erected on the second support; and the second support arranged below the position in which the steel pipes are to be installed is an adjustable support. The device and the method are suitable for installation of the steel pipes at a joint of a volute outlet and a water conveying pipe gallery in a nuclear power plant circulating water pump house, can ensure the smooth installation of butterfly valves, and can ensure the installation precision of two sections of steel pipes which are arranged at intervals under the condition of super-standard design accuracy requirements.

Description

technical field [0001] The invention relates to a device capable of adjusting the placement position of a steel pipe with a large diameter and a heavy weight, and a method for installing the steel pipe with a large diameter and a heavy weight in place by using the device. Background technique [0002] The circulating water pump room of the nuclear power plant is designed with two symmetrical large-diameter and heavy-weight steel pipes (rubber-lined steel pipes) at the junction of each volute water outlet and the water delivery pipe gallery, and the ends of the two steel pipes are designed with flanges , Between the two steel pipes, a butterfly valve with a certain length is designed, and the butterfly valve and the steel pipe are connected by flanges. For details on the installation position of the steel pipe, see figure 1 . Due to the design process and equipment procurement of the butterfly valve, when installing the steel pipe and the butterfly valve, the steel pipes at...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-precision, large-diameter flanged steel pipe section, track-changing installation device and method, to solve the technical problem that the traditional construction technology cannot hoist the steel pipe in place at one time; and to solve the traditional construction technology The installation accuracy of the steel pipe cannot be guaranteed, especially the problem that the butterfly valve installed later can correspond to each flange eye on the steel pipe one by one

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