Method for manufacturing long-life anticorrosion structure for root of principal material of transmission tower

Abstract

The invention belongs to the technical field of metallic material anticorrosion and discloses a method for manufacturing a long-life anticorrosion structure for the root of a principal material of a transmission tower. The position between a protection cap and a tower foot base material is coated with transition coatings; the surface of the tower foot base material is sequentially provided with acrylic resin, Rohm and Haas glue, Megum538 glue, epoxy resin concrete and waterproof anti-seepage coating from inside to outside; and the outer surface of the protection cap is coated with anti-seepage coating. The protection scheme of the acrylic resin, the Rohm and Haas glue, the Megum538 glue, the modified epoxy resin concrete and the waterproof anti-seepage coating is adopted, and thus the tower foot base material can be well protected; through a transition layer of the acrylic resin, the Rohm and Haas glue and the Megum538 glue, the bonding strength between the protection cap and the tower foot base material is improved; and through the design of the inverted-water-edge contour of the protection cap, deposition of rainwater on the protection cap can be effectively avoided, and the phenomenon that due to long-time rainwater erosion, bubbling of the waterproof anti-seepage coating on the outer layer of the protection cap is avoided.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion of metal materials, and in particular relates to a method for manufacturing a long-life anticorrosion structure for the main material root of a power transmission tower. Background technique [0002] Transmission line towers are the load-bearing structures of high-voltage transmission lines. With the continuous construction of ultra-high voltage and long-distance ultra-high voltage power grids, the requirements for the safety, stability and economic operation of power systems are getting higher and higher. In order to ensure the safe operation of the power grid and improve the reliability of power supply, it is necessary to ensure the reliability of the transmission line tower operation. The transmission lines under the jurisdiction of the Liuzhou Bureau of the EHV Transmission Company mainly use transmission iron towers, and their structures are self-supporting steel towers. After several ...

AI Technical Summary

Problems solved by technology

[0006] ①For the Longsha A line and Longsha B line without protective caps, the corrosion of the main material tower foot is relatively serious, and the most serious corrosion thickness is 3.22mm; ②For the Heliu A line and Heliu B line, the main material tower foot Epoxy resin + fine sand + waterproof paint was used to make a protective cap for treatment, but the protective cap did not completely cover the concrete foundation, and the protective layer on the outer surface of the protective cap was partially cracked and blistered, and the joint between the protective cap and the concrete foundation There are cracks, which cause rainwater to erode into the protective cap. Although the protective cap has played a certain protective role, the metal at the foot of the main material tower has further corrosion

③For Shanhe Line A and Shanhe Line B, the main material tower foot is protected by a protective cap made of epoxy resin + fine sand + waterproof paint, but the protective cap does not completely cover the concrete foundation, and the metal at the main material tower foot is further corroded The phenomenon

When the decline in the bearing capacity of the main material exceeds the safety limit, it will endanger the structural safety of the transmission tower and cause a tower collapse accident

[0007] In summary, the existing problems in the prior art are: due to the weak bonding force between the epoxy resin sand and the protective coating of the steel structure, it is easy to crack between the upper end of the protective cap and the coating; Due to the difference in shrinkage rate between cement foundations under the condition of temperature fluctuation, cracks occur at the interface under long-term cycle conditions

During the use of traditional epoxy resin sand protective caps, cracks occur at the junction of the protective cap and the concrete foundation, and cracks between the protective cap, the upper end and the coating, causing water to penetrate into the surface of the main material along the cracks, causing further corrosion of the main material ; When the decline in the bearing capacity of the main material exceeds the safety limit, it will endanger the structural safety of the transmission tower and cause a tower collapse accident

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