Balloon for blocking vent pipe of liquefied gas storage tank and vent pipe blocking instrument

A technology of liquefied gas and balloons, which is applied in the direction of gas processing/storage, adjustable-capacity gas storage tanks, pipes/pipe joints/fittings, etc. It can solve the problems of unable to occlude piping and achieve safe and stable occlusion effects

Active Publication Date: 2020-11-06
MUTSUBISHI RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The IGC Code (8.2.9) stipulates that "the vent pipe device on the downstream side of the pressure relief valve does not have a shut-off valve." Unlike conventional piping, it is impossible to use the shut-off valve to block the safety valve (pressure relief valve) during inspection or repair. Piping

Method used

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  • Balloon for blocking vent pipe of liquefied gas storage tank and vent pipe blocking instrument
  • Balloon for blocking vent pipe of liquefied gas storage tank and vent pipe blocking instrument
  • Balloon for blocking vent pipe of liquefied gas storage tank and vent pipe blocking instrument

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Embodiment Construction

[0105] Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. The present invention is not limited to the following description.

[0106]

[0107] figure 2 An external view of the balloon for blocking the ventilation tube of the present invention is shown. The balloon for blocking a ventilation pipe of the present invention is used as a blocking portion of a device for blocking a ventilation pipe described later. The balloon for occluding the ventilation pipe of the present invention can be as follows: figure 2 (a) shows a cylindrical shape, and it can also be figure 2 (b) shows a truncated cone shape (hollow truncated cone shape). exist figure 2 (a) and figure 2 In (b), the upper end and the lower end are openings.

[0108] image 3 show figure 2 (a) X-X sectional view. The balloon for blocking a ventilation pipe of the present invention is composed of an inner membrane 41 made of silicone rubber, a...

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Abstract

The purpose of the present invention is to provide: a balloon for blocking a vent pipe of a liquefied gas storage tank, the balloon having excellent physical strength, expansibility, and durability under low temperature; and a vent pipe blocking instrument which is equipped with said balloon. The balloon for blocking a vent pipe of a liquefied gas storage tank according to the present invention has: an inner membrane and an outer membrane that are made of a silicone rubber material; and a reinforcement base material that is sandwiched between the inner membrane and the outer membrane. The balloon has an external form which is in a cylindrical shape or a truncated conical shape that has openings at both ends, and is inflated when an inert gas is injected thereinto with the openings being kept tightly sealed. The reinforcement base material comprises fiber bundles and has a network-like structure.

Description

technical field [0001] The present invention relates to a balloon for temporarily blocking a vent pipe of a storage tank for liquefied natural gas or liquefied petroleum gas, and a blocking device used for inserting the balloon into the pipe to close the vent pipe. Background technique [0002] When repairing gas piping, air bags are sometimes used to temporarily block the gas. After being inserted into the gas pipe, the air bag can be filled with air to expand the inner diameter of the gas pipe to temporarily block the gas pipe (Patent Documents 1 to 3). [0003] On the other hand, tankers transporting liquefied gas such as liquefied natural gas (LNG) or liquefied petroleum gas (LPG) have internal storage facilities for storing liquefied gas that has been liquefied at low temperature such as methane, propane, butane, ethylene, or ammonia. cans. The storage tank of this type of tanker is vertically connected to the upper part of the ventilation pipe, and a safety valve is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/12F17C13/06
CPCF17C13/06F16L55/124F17C2205/0311F17C2221/033F17C2221/035F17C2223/0153F17C2223/0161F17C2223/033F17C2260/015F17C2260/035F17C13/004F17B1/14B65D90/54F17C2205/0302C08J5/046C08J5/18C08J2423/06C08J2483/04C08L83/04C08L2203/16C08L2205/16C08L2207/068F17C2205/0352
Inventor 原正树前野广大
Owner MUTSUBISHI RUBBER
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