Outer floating roof storage tank with lightning rods and metal roof

Abstract

The invention discloses an outer floating roof storage tank with lightning rods and a metal roof. The outer floating roof storage tank comprises a tank body, a floating roof, the metal roof and the lightning rods, the metal roof is erected outside the floating roof, a supporting column and tank roof angle steel are welded, and the supporting column and the tank body are reliably and electrically connected; the plurality of lightning rods are arranged above the metal roof, lightning rod supporting rods are fixed on a fixing supporting part which is pre-installed and is located on a metal plate,the lightning rods are made of hot-dip galvanized round steel or steel pipes, moreover, the sectional area of each lightning rod is not smaller than 176mm<2>, the length of each lightning rod is 2m,the diameter of each lightning rod is not smaller than 16 mm, the lightning end of each lightning rod is in a hemispherical shape, and the bending radius of each lightning end ranges from 4.8mm to 12.7mm. The protection range of the lightning rods is calculated through a rolling ball method, the number and the positions of the lightning rods are determined, the lightning rods are arranged above the metal roof and are in reliable electrical connection with the metal plate, so that direct lightning protection is achieved on the metal roof, the metal roof of the outer floating roof storage tank is prevented from being directly hit by the thunder and lightning, through the metal roof, the influence exerted by natural factors such as rainwater and sunshine on internal accessories can be reduced, moreover, the damage caused by thunder and lightning induction on the interior of the storage tank can also be effectively avoided, so that multiple lightning protection on the outer floating roof storage tank is realized, and the occurrence frequency of fire accidents caused by lightning on the storage tank is greatly reduced.

Description

technical field [0001] The invention relates to an external floating roof storage tank with a lightning rod and a metal roof. Background technique [0002] Petroleum is an important strategic material, which is related to the development of the national economy and the stability of the society. Oil tank storage is the most important and common oil storage method currently used. my country has established many large national oil reserve bases, and oil tank farms are mostly built in areas prone to lightning disasters such as along the river and coast. Lightning struck and caught fire. In recent years, there have been many fire accidents of floating roof storage tanks caused by lightning strikes in crude oil depots in China. This is related to the large diameter of the floating roof of the storage tank and the obvious increase in the probability of direct lightning hitting the floating roof. [0003] In order to avoid explosion accidents of storage tanks caused by direct light...

AI Technical Summary

Problems solved by technology

[0003] In order to avoid explosion accidents caused by lightning directly hitting the floating roof, the floating roof needs to be within the lightning protection range. However, the area of ​​the floating roof is too large, and the traditional direct lightning protection method alone cannot provide effective protection.

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