Metal inner tank structure of a membrane cryogenic storage tank

Abstract

The invention discloses a metal inner tank structure of a membrane type cryogenic storage tank, comprising a tank bottom and a tank wall, the tank wall is welded by a base plate, the tank bottom is in an approximately circular structure, the tank bottom is spliced ​​by the base plate and The splicing gap is filled by the peripheral special-shaped plate. The base plate is composed of a basic unit or several basic units. The basic unit is composed of a flat plate and longitudinal waves and transverse waves on the plate. The longitudinal waves and transverse waves are both concave on one side. In the protruding arched structure, the longitudinal wave and the transverse wave are vertically interlaced and connected together through a smooth transition of a curved surface, and both the longitudinal wave and the transverse wave are in a smooth transition with the surrounding flat plates through a curved surface. The metal inner tank structure of the membrane cryogenic storage tank can avoid stress concentration during thermal expansion and cold contraction, and only a small number of molds are required for manufacturing, which can improve on-site assembly efficiency during assembly.

Description

technical field [0001] The invention relates to the technical field of membrane-type cryogenic storage tanks, which are used for storing media such as LNG, LPG, ethylene, liquid nitrogen, and liquid oxygen that require cryogenic storage, in particular to a metal inner tank structure of a membrane-type cryogenic storage tank. Background technique [0002] Natural gas is a combustible gas that is naturally mined, and its main component is methane. LNG It is made by cooling gaseous natural gas to -162°C under normal pressure to condense it into liquid. Natural gas liquefaction can greatly save storage and transportation space and cost, and has the characteristics of large calorific value and high performance. Natural gas is becoming more and more popular as a clean energy source, and many countries have listed LNG as the preferred fuel. [0003] With the increasing demand for natural gas in my country, the construction of LNG receiving stations has developed rapidly, and the ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a metal inner tank structure of a membrane cryogenic storage tank, which solves the problem that the structure is too complicated, the processing is very difficult, the stress at the kink position is easy to concentrate, and the corrugations are connected by flat plates, and the vertical and horizontal corrugations are all is a problem of a set of waves

Images