Ultra-large-diameter steel penstock installation method

Abstract

The invention discloses an ultra-large-diameter steel penstock installation construction technique. An installation method comprises the steps that ultra-large-diameter steel penstocks are coupled on site, specifically, tiles split into three flaps are rounded, single-section steel penstocks are assembled into multi-section steel penstock sets through assembling and welding, and stiffening rings are additionally welded to the multi-section steel penstock sets; the coupled steel penstock sections are transported in an adit, specifically, rails are prefabricated and paved in the adit, and the steel penstocks are transported to an installation station through a separable trolley; and the formed steel penstocks are positioned and installed, specifically, in the installation station, after steel penstock bodies are regulated to the installation height and fixed through a separable trolley jacking device, the trolley is removed, and integral installation of the multiple steel penstock sections is achieved. According to the ultra-large-diameter steel penstock installation construction technique, the operation layout of a traditional production line is effectively simplified, temporary assembling facilities inside the adit are simplified, the excavated sections of branched holes and the excavated sections of a main hole are decreased, the occupied area for steel penstock section assembling is decreased, and the requirements of a place where finished products can be stacked are eliminated; steel penstock sections are formed at a time during secondary assembling and welding, and the installation precision is improved through mechanical assembling and welding; and the installation construction technique does not rely on traditional lifting and turning modes any more, the safety risk is lowered, the installation construction period is shortened, the installation personnel number is decreased, and investment is reduced.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering construction, in particular to the technical field of hydroelectric equipment installation, and in particular to an automatic production and installation technology of pressure steel pipes for super-large-diameter hydroelectric generators. Background technique [0002] In the traditional manufacturing of penstocks in the factory, multiple anti-circular platforms are used. The tiles after blanking and forming are hoisted to the platforms, and the circles are assembled and adjusted by tools such as presses and seam presses, and then welded by multiple welders. After welding, carry out non-destructive flaw detection inspection. After passing the pass, hand it over to the riveter for round adjustment, install the stiffening ring, and then hand it over to the welder for welding the stiffening ring butt joint and fillet weld. The production cycle of a single section ...

AI Technical Summary

Problems solved by technology

This method is generally used in the installation of improvised joints. It has many auxiliary processes, high safety risks, and difficult quality control.

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