As a core connecting component in fields such as power, rail transit, and new energy, the performance of high-strength insulated bolts directly affects the safety and reliability of equipment. Due to long-term exposure to mechanical stress, electric field effects, and environmental erosion, bolts are prone to insulation failure, loosening, corrosion, and other issues. Systematic maintenance and upkeep are necessary to ensure their long-term stable operation.

Cleaning method: Use a dust-free cloth or specialized cleaning agent to wipe the surface of the bolt, avoid using wire brushes or sandpaper, and prevent scratching the insulation layer. For oil stains, alcohol or acetone can be used for wiping, but it is necessary to ensure that they evaporate before assembly.

Drying treatment: After cleaning, blow dry the bolts with dry air to prevent residual moisture from causing electrochemical corrosion.

Coating repair: If there is slight damage to the insulation layer, epoxy repair agents or ceramic coating spraying can be used for repair. After repair, insulation resistance testing is required to verify performance.

Rust prevention treatment: Apply rust proof oil or zinc based coating to metal parts to extend their service life. For example, in outdoor equipment, Dacromet coating (zinc aluminum chromate coating) can be used to enhance corrosion resistance.

Sealing protection: Install sealing rings or sealant at the bolt connection to prevent moisture and dust from entering. For example, use silicone rubber sealing rings at the bolts of the transformer bushing.

Shielding protection: For bolts that are exposed to the outdoors for a long time, protective covers can be installed or UV cured coatings can be applied to resist UV aging.

Precautions for using high-strength insulation bolts:

-Construction environment control

-Stop working when the temperature is below -10 ℃ or when the friction surface is damp or there is rain or snow.

-The friction surface needs to be dry and clean, removing impurities such as oil stains and welding slag to prevent affecting the friction force.

-Operating standards

-The direction of bolt penetration is uniform, which facilitates subsequent inspection and maintenance.

-The initial torque value shall not be less than 50% of the final torque value, and anti rust paint shall be applied promptly after the final torque.

-Overloaded bolts should be discarded and cannot be reused; It is forbidden to cut plum blossom heads with flames.

-Special scenario handling

-Narrow spaces can be equipped with elevated sleeves or manually installed, but torque parameters need to be adjusted.

-In outdoor or corrosive environments, after passing the acceptance inspection, seal the board joints to prevent moisture from entering.