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Leak detection method and device for inner container of interlayer cryogenic container

A low-temperature container and inner container technology, applied in the container discharge method, container filling method, and by measuring the increase and deceleration rate of the fluid, etc., can solve the problems that cannot be detected, achieve good heat preservation effect, simple and convenient operation and maintenance, and high strength high effect

Active Publication Date: 2016-10-26
YICHANG JIANGXIA MARINE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can only see large defects, but cannot detect tiny pinhole defects

Method used

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  • Leak detection method and device for inner container of interlayer cryogenic container
  • Leak detection method and device for inner container of interlayer cryogenic container
  • Leak detection method and device for inner container of interlayer cryogenic container

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Embodiment Construction

[0033] Such as Figure 4 with 5 Shown: a square shell 1 that can be opened at the top is welded with a carbon steel plate, and two support plates 5 with a "V"-shaped notch at one end are welded on the bottom surface of the shell 1, and a shell 1 is made. The opening is matched with the cover plate 4, and a concave-convex surface is provided on the contact surface between the cover plate 4 and the shell 1, and a rubber gasket 14 is assembled between the shell 1 and the cover plate 4; and then welded at one end of the shell 1 Three pipes, a pressure detection device 13 and a vacuum shut-off valve 9 are sequentially assembled on a pipe at the bottom; an inlet and outlet pipe 8 for connecting the inner container 3 is welded on the middle part of the housing 1; a pipe 8 is installed on the top of the housing 1 One end of the root is connected to the inner container 3, and the other end is located at the detection tube 7 outside the housing 1, and a gas release valve 10, a safety v...

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Abstract

The invention discloses a leakage detection method and device for an inner container of an interlayer low-temperature container. The inner container of the low-temperature pressure container is arranged in the leakage detection device, an expanding condition of a leakage point is simulated when the container is in a low-temperature and high-pressure working condition; the device matched with the method comprises an absolutely-leakless shell, and a pipeline which is used for connecting the inside and the outside of the shell; a low-temperature liquid is fed into the inner container by the pipeline, then pressure maintaining and calculation are performed, and the obtained leakage rate is judged in a design range or not. According to the leakage detection method and device, the structure is simple, the leakage detection method is accurate, and the device can be used repeatedly.

Description

technical field [0001] The invention relates to a leak detection method and device for a pressure vessel, in particular to a leak detection method and device for an inner container of an interlayer cryogenic container. Background technique [0002] Cryogenic vessels are pressure vessels that hold cryogenic liquids and carry high pressure. The container is divided into an inner container and an outer container. The inner container is filled with a low-temperature liquid and is subjected to high pressure when the liquid volatilizes into a gas. A sandwich is formed between the inner container and the outer container. Usually, the interlayer is filled with insulating materials and the interlayer is kept at a higher vacuum. temperature, so that the inner container can maintain a low temperature state. If there is a leak in the container, the vacuum degree in the interlayer will drop, and the heat insulation of the interlayer will decrease, resulting in an increase in the tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C13/02G01M3/32
Inventor 何明石教伦
Owner YICHANG JIANGXIA MARINE MACHINERY