Spring compensation type soft seal device for external floating-roof oil tank

Abstract

The invention discloses a spring compensation type soft seal device for an external floating-roof oil tank. The spring compensation type soft seal device comprises multiple sealing assemblies arranged around a floating roof; the floating roof is provided with a spring compensation mechanism connected with each sealing assembly; the spring compensation mechanism comprises a pressurization connection rod and a reset spring; one end of the pressurization connection rod is connected with the sealing assemblies; the other end of the pressurization connection rod is connected with the rest spring; the pressurization connection rod oppresses the sealing assemblies towards the outer side of the floating roof all the time through elastic force of the reset spring; each sealing assembly comprises a movable pressurization board with one side connected with the spring compensation mechanism; open-hole sponges and closed-hole sponges which are tightly attached to the tank wall are arranged on the other sides of the movable pressurization boards; the closed-hole sponges are located above the open-hole sponges. Through the spring compensation mechanism, the sealing assemblies abut against the inner wall of the oil tank all the time, and even if the volume of crude oil in the oil tank changes and the floating roof ascends or descends along with the liquid level, the sealing assemblies can still keep the good sealing effect.

Description

technical field [0001] The invention relates to a spring-compensated soft sealing device for an external floating roof oil tank, belonging to the technical field of floating plate sealing for external floating roof tanks of crude oil. Background technique [0002] Storage tanks are commonly used to store volatile petroleum products such as crude oil, gasoline or kerosene. The floating plate of the external floating roof storage tank is a floating top cover floating on the surface of the liquid storage, which floats up and down with the input and output of the storage liquid. The sealing device is an important accessory of the external floating roof oil tank. It consists of primary sealing and secondary sealing. Hermetic composition. The main function is to maintain the gap between the floating plate and the tank wall, so that the floating plate of the oil tank can rise and fall smoothly, isolate the contact between the oil product and the atmosphere, and prevent the volatil...

AI Technical Summary

Problems solved by technology

[0011] The original soft seal structure, due to its poor resistance to crude oil corrosion and air aging, generally has a service life of only 3 to 6 years, which does not match the 10-year overhaul of the entire tank, and requires additional tank cleaning and replacement

For an oil storage tank of 100,000 cubic meters, the cost of cleaning the tank alone needs about 1 million yuan, plus the replacement cost of the sealing structure, the cost is very huge

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