Double-station sleeving combination device and method of double-cylinder type storage tank

Abstract

The invention discloses a double-station sleeving combination device and method of a double-cylinder type storage tank. The double-station sleeving combination device of the double-cylinder type storage tank comprises an inner tank body supporting device and two outer tank body supporting devices. The inner tank body supporting device comprises a support, guide rods, a hydraulic rod, a supportingplate and a connection cross beam. The two ends of the cross connection beam are fixedly provided with two inner tank bodies. The hydraulic cylinder can drive the connection cross beam to move up anddown under the constraint of the guide rods, so that it can be guaranteed that the center lines of the inner tank bodies and the outer tank bodies are aligned. Each outer tank body supporting device comprises a trolley and a carrier roller frame installed on the trolley, wherein sleeving combination of the inner tank bodies and the outer tank bodies can be achieved through movement of the trolleys, and coincidence and locating of supporting points of the inner tank bodies and the outer tank bodies can be achieved through rotation of carrier rollers. The double-station sleeving combination device of the double-cylinder type storage tank is convenient and rapid to operate and capable of achieving simultaneous sleeving combination of the inner and outer tank bodies of different diameters, does not need an overhead travelling crane, liberates the productivity of the overhead travelling crane, achieves sleeving combination of two sets of inner and outer tank bodies at the same time and improves the production efficiency.

Description

technical field [0001] The invention belongs to the application field of liquefied natural gas (LNG), and in particular relates to a device and method for fitting inner and outer tank bodies of a low-temperature storage tank of liquefied natural gas. Background technique [0002] As a kind of clean energy, natural gas is not only pollution-free after burning, but also has low cost. It has attracted more and more attention from the society, and its application fields have gradually expanded. Gas-liquid natural gas LNG is mostly stored and transported in double-barreled low-temperature storage tanks. [0003] The LNG double-barreled low-temperature storage tank is an outer tank fitted with an inner tank, and a vacuum insulation interlayer structure is used between the inner and outer tanks. In the production process, the inner tank body is fitted into the outer tank body, using the figure 1 In the fitting method shown, one end of the inner tank body 1 is fixed to the fitting...

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Problems solved by technology

[0004] This fitting method requires that the connecting shaft between the fitting trolley and the inner tank body can be rotated to ensure the accurate positioning of the eight support points. When one end of the inner tank body is suspended by the crane, it is difficult to rotate the inner tank body to locate; After the fitting is completed, it is necessary to use the crane to keep the inner tank stable, and the crane cannot be released until the inner tank is positioned and welded, which seriously affects the use of the crane in other processes, and the production efficiency is low; for inner and outer tanks with different diameters Fitting, it is necessary to adjust the height of the fitting trolley to achieve the same center line of the inner and outer tanks, or use another fitting trolley, which will increase the cost of tooling

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