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Manhole device of low-temperature liquid storing and transporting container

A low-temperature liquid and container technology, which is applied in the field of low-temperature liquid storage and transportation equipment, can solve problems such as increased maintenance costs, reduced shell life, and internal gas leakage, achieving obvious sealing effects, reduced maintenance costs, and reduced heat leakage.

Inactive Publication Date: 2016-01-27
天津万广科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some manufacturers do not set manholes on the outer shell, because the setting of manholes may cause internal gas leakage, or the vacuum degree of the interlayer may not be guaranteed. Without manholes, maintenance is very inconvenient and maintenance costs increase. , and even reduce the life of the shell

Method used

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  • Manhole device of low-temperature liquid storing and transporting container

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings. Such as figure 1 As shown, the present invention provides a manhole device for a cryogenic liquid storage and transportation container. The stud 2 and the nut 1 are used to fixedly connect the manhole flange 5 and the manhole flange cover 3; the manhole flange 5 is a long neck butt welding flange of DN400, One end is fixedly connected with the manhole sub-joint, and the other end is covered with a manhole cover 3 for closing the manhole device; the gasket 4 added between the manhole flange and the manhole flange cover is a metal wound gasket; the sealing surface of the manhole flange is in the form of a tongue and groove surface Sealing further strengthens the sealing effect. The manhole nipple 6 is welded to the shell head 11 of the cryogenic vessel with full penetration. One end of the expansion joint 7 is fixedly connected to the manhole nipple, and the other end is f...

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Abstract

The invention relates to a manhole device of a low-temperature liquid storing and transporting container. The manhole device of the low-temperature liquid storing and transporting container comprises a manhole flange, a DN400 sealing head and an expansion joint, wherein the manhole flange is a long-neck butt-welded flange; one end of the manhole flange is welded with an outer layer housing of a low-temperature container; one end of the manhole flange is covered by a manhole cover used for sealing the manhole device; the sealing surface of the manhole flange is sealed by a tenon slot; the DN400 sealing head is welded with an inner layer housing of the low-temperature container, so that the inner layer housing is in a heat insulation sealed environment; the expansion joint is connected between a manhole short segment and a tube section which is connected with the sealing head. Through the manhole device of the low-temperature liquid storing and transporting container, the problem of deformation caused by cold shrinkage of the inner housing of the low-temperature container is solved; and the manhole device is convenient to maintain, obvious in sealing effect and convenient to mount.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D90/10B65D90/02
Inventor 王娜
Owner 天津万广科技有限公司
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