Manhole device of low temperature liquid storing and transporting container

A cryogenic liquid and container technology, applied in the field of cryogenic liquid storage and transportation equipment, can solve the problems of increased maintenance cost, reduced shell life, internal gas leakage, etc., and achieves obvious sealing effect, reduced maintenance cost, and convenient opening.
CN103470950AInactive Publication Date: 2013-12-25天津万广科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
天津万广科技有限公司
Publication Date
2013-12-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a manhole device of a low temperature liquid storing and transporting container, comprising a manhole flange, a DN400 end socket and an expansion joint, wherein a long welding neck flange is adopted, one end of the flange is welded with the outer layer shell of the lower temperature container, the other end of the flange is covered by a manhole cover for sealing the manhole device, and a tongue and groove face is adopted as the sealing surface for sealing; the DN400 end socket is used for being welded with the inner layer shell of the low temperature container, so that the inner layer shell is in a heat insulation closed environment; the expansion joint is connected between the short joint of the manhole and a barrel joint connected with the end socket, so as to solve the problem of deformation caused by chilling shrink of the low temperature container. The invention provides the manhole device which is convenient to overhaul, obvious in sealing effect and convenient to install.
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Description

technical field

[0001] The invention relates to a double-layer vacuum insulation cryogenic container manhole device, in particular to a cryogenic liquid container manhole device used for storage and transportation of low-temperature liquids such as liquefied natural gas, and belongs to the technical field of cryogenic liquid storage and transportation equipment. Background technique

[0002] The double-layer vacuum insulated cryogenic vessel includes an inner shell and an outer shell, and a heat-insulating interlayer space is set between the inner shell and the outer shell. For the convenience of maintenance, the pressure vessel is equipped with a manhole device, but the manhole The setting must ensure the airtightness of the container. The current double-layer vacuum insulated cryogenic vessels generally only have process manholes, which are convenient for final seam welding and non-destructive testing during the manufacture of inner shells, and do not have openable manhole...

Claims

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