Extra-high voltage iron tower assembly lifting pole

Abstract

The invention relates to an extra-high voltage iron tower assembly lifting pole comprising a straight segment, a conical segment, a rotary lifting head and a lower bearing cap. The straight segment isformed by connecting at least two single straight sections end to end. An inserting-connection block is arranged at the top end of each single straight section. An inserting-connection seat is arranged at the bottom end of each single straight section and is provided with an inserting slot matched with the corresponding inserting-connection block. The top end of each single straight section is connected with the inserting-connection seat at the bottom end of the upper adjacent single straight section through the corresponding inserting-connection block in a matched inserted mode and is matched with a horizontal hinge pin for connection fixing. The bottom end of each single straight section is connected with the inserting-connection block at the top end of the lower adjacent single straight section through the corresponding inserting-connection seat in a matched inserted mode and is matched with another horizontal hinge pin for connection fixing. Installation is conducted with the extra-high voltage iron tower assembly lifting pole, labor and time are saved, assembly efficiency and precision are high, manual assembly errors can be reduced effectively, the iron tower assembly periodis shortened effectively, construction efficiency is improved, use is safe and reliable, and life is long.

Description

technical field [0001] The invention relates to the technical field of ultra-high voltage iron towers, in particular to a pole for erecting an ultra-high voltage iron tower. Background technique [0002] As my country enters the era of UHV power grids, UHV transmission projects have been intensively started in recent years, and the important link is the construction of UHV iron towers. At present, the straight sections and cone sections of the poles are basically connected by flanges. The flanges are connected with 20∽12 bolts. The bolt connection is time-consuming and laborious. The bolts need to be tightened twice during the pole assembly process. The conventional bolt connection of the pole-holding flange has defects. Due to the characteristics of axial force, if the pole is deflected by 0°~15° (within the allowable range), the pole will bear a certain bending moment. At this time, half of the connecting screw on the flange will be under tension and half under compression ,...

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Problems solved by technology

[0002] As my country enters the era of UHV power grids, UHV transmission projects have been intensively started in recent years, and the important link is the construction of UHV iron towers. At present, the straight sections and cone sections of the poles are basically connected by flanges. The flanges are connected with 20∽12 bolts. The bolt connection is time-consuming and laborious. The bolts need to be tightened twice during the pole assembly process. The conventional bolt connection of the pole-holding flange has defects. Due to the characteristics of axial force, if the pole is deflected by 0°~15° (within the allowable range), the pole will bear a certain bending moment. At this time, half of the connecting screw on the flange will be under tension and half under compression , the tension and compression are both thread force, so the connecting bolts of each pair of holding rods will have a shortened service life and loss of life, which has a serious impact on the normal use of the holding rod

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