Inner supporting device for installing large pressure steel pipe

Abstract

The invention discloses an inner supporting device for installing a large pressure steel pipe, and belongs to the technical field of pressure steel pipe construction. The inner supporting device comprises a hydraulic system and an inner supporting device body, the inner supporting device body comprises a shell, a plurality of supporting arms are arranged on the outer wall of the shell in a circumferential distribution mode, one end of each supporting arm penetrates through the outer wall of the shell, a driving mechanism is arranged in the shell, the end, located in the shell, of the supporting arm is connected with the driving mechanism, and the driving mechanism is used for adjusting the length of the part, extending out of the shell, of the supporting arm. According to the scheme, in the using process, two threaded sleeves can be driven to move reversely at the same time by rotating a first two-way screw rod, the length of the part, extending out of the shell, of the supporting arm is adjusted, when the inner supporting device is disassembled, the multiple supporting piles are disengaged from the inner wall of the pressure steel pipe at the same time, the inner supporting device is disassembled conveniently, and meanwhile, in the installation process, the minimum outer diameter of the inner supporting device body can be adjusted so that the inner supporting device can be suitable for pressure steel pipes with different diameters.

Description

technical field [0001] The invention relates to the technical field of penstock steel construction, and more specifically, relates to an internal support device for installing large penstock steel pipes. 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. In the process of water conservancy construction, the pressure steel pipe is rolled by steel plate. During the transportation, the inner support and the outer reinforcement ring are used to reinforce it to prevent deformation; in the subsequent construction process of the pressure steel pipe outsourcing concrete pouring construction, the internal support is also required. Continuous support is used to prevent the penstock from deforming during the outsourcing concrete pouring process; therefore, the internal support m...

AI Technical Summary

Problems solved by technology

[0004] Disassembly is cumbersome. Most of the existing internal support devices have a rice-shaped support arm with a fixed length. During the disassembly process of the internal support device, it is often necessary to dismantle multiple support arms before the internal support device can be taken out of the pressure steel pipe. ;

[0005] The adjustment is laborious. The existing internal support mechanism that uses screw rods and bolts to cooperate with each other requires manual turning of the bolts when rounding the penstock. The labor intensity is high, and it is difficult to round the penstock with a large wall thickness. larger;

[0006] The cost is relatively high. Some of the existing internal support devices use jacks / hydraulic cylinders as the support power source. Although it is easy to adjust and can meet the support of large-wall pressure steel pipes, before the internal support device is disassembled, in order to maintain the support strength, The jack / hydraulic cylinder cannot be removed, requiring a lot of jack / hydraulic cylinder

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