Spherical grid-structured top cover for low temperature liquefied gas and low temperature natural gas storage tanks

Abstract

The invention relates to a spherical grid-structured top cover for low temperature liquefied gas and low temperature natural gas storage tanks. The top cover is mounted on the top of a cylindrical storage tank and comprises an edge ring beam, a reticulated shell connected with the edge ring beam and a skin mounted on the reticulated shell, wherein the reticulated shell is of a spherical bidirectional meridian grid structure, the spherical bidirectional meridian grid structure is formed by bidirectional meridian arc net rods installed and welded via through-type rigid joints, the curvature radius of each meridian arc net rod is a same spherical radius, and the top of the structure can bear hundreds of tons of hanging load, nonuniform load and tens of tons of concentrated load at a low temperature of -46 to -164 DEG C. Compared with the prior art, the spherical grid-structured top cover has the advantages of uniform structural arrangement, convenience in installation, low cost, etc.

Description

Technical field [0001] The invention relates to a petrochemical storage and transportation equipment, in particular to a spherical grid structure top cover for low-temperature liquefied gas and low-temperature natural gas storage tanks. Background technique [0002] In the petrochemical industry and related storage and transportation industries, vertical cylindrical storage tanks are widely used to store crude oil and oil and gas products. As my country's crude oil imports become larger and larger, the demand for such storage tanks is increasing and developing towards large-scale. With the enlargement of storage tanks, the requirements for the quality of the top cover of the storage tank are getting higher and higher. The quality of the top cover of the storage tank has become an important link that affects the safety, economy and ease of use of large storage tanks. The tank top cover is generally composed of side beams, a reticulated shell connected to the side ring beams and a...

AI Technical Summary

Problems solved by technology

The structural form can only be taken in the arctic zone of the spherical surface of the longitude and latitude lines, such as figure 1 It is a schematic diagram of the network structure of the latitude and longitude lines of the existing top cover. Its disadvantage is that the materials in the middle are dense and the surrounding materials are loosely arranged, which makes the structural materials unreasonable and the installation cost is high.

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