Inner support device for manufacturing penstock

Abstract

The invention provides an inner support device for manufacturing a penstock. The inner support device for manufacturing the penstock is composed of two single support frames which have the totally same structure. According to each support frame, a hexagonal I-shaped steel support and penstock supports are welded together, the penstock supports are welded into a whole through angle steel connecting rods, the end of each penstock support is welded to a jack support, each jack is welded to one jack support, and the two support frames are welded into a whole through U-steel connecting rods. When being used, the inner support device for manufacturing the steel penstock is hung in the penstock, the roundness of the penstock can be accurately controlled through adjustment of the abutting deviation between the lower-layer jacks and the penstock wall, and therefore beneficial conditions are provided for follow-up operation such as welding and stiffening ring assembly alignment. The inner support device for manufacturing the steel penstock is easy to install, convenient to use, easy to disassemble, capable of enabling the roundness of the penstock and the surface quality of the penstock wall to be effectively controlled, lightening the auxiliary workload of penstock manufacturing, improving the production efficiency and saving cost, and reusable.

Description

technical field [0001] The present invention relates to an inner support device used in the manufacture of pressure steel pipes, in particular to an inner support device which is convenient for adjusting the roundness and disassembly of the pressure steel pipes and ensures the roundness of the pressure steel pipes and the surface quality of the pipe wall. Background technique [0002] Penstocks are used more and more in hydropower stations, especially the water delivery system of pumped storage power stations, which are often lined with penstocks in large quantities due to the influence of geological conditions. With the continuous development of science and technology, 600Mpa and 800Mpa high-strength steel plates are also widely used in the manufacture of penstocks, which also puts forward higher requirements for the manufacturing technology of penstocks. There are two types of traditional inner support. One is welding. The inner support used in this method does not have th...

AI Technical Summary

Problems solved by technology

There are two types of traditional inner support. One is welding. The inner support used in this method does not have the function of rounding, but can only play a role of reinforcement after rounding. Requires the workload of cutting, grinding weld scars, and trimming of support pipes. In addition, if you do not pay attention to grinding, it will also damage the base metal and reduce the thickness. If it exceeds 2mm, welding repairs are required, which seriously affects the quality of the penstock. The way of screw rod, this method uses the screw rod to adjust the circle and play the role of support and reinforcement. The design and processing of the screw rod requires high precision. During use, when encountering thicker steel plates, it is laborious to manually adjust the screw rod Poor rounding effect

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