An emergency plugging method for a cryogenic liquid tank car

Abstract

The invention belongs to the technical field of the rapid field leakage stoppage, and particularly relates to an emergency leakage stoppage method for a low temperature liquid tank truck. A glue injection gun point is connected with the front end of a glue injection gun. The rear end of the glue injection gun is connected with a device like a common air pump or a hydraulic pump. A polydimethylsiloxane leakage stoppage agent is injected into a leakage point through a glue injection pipe. When the polydimethylsiloxane is discharged from an air discharge duct, the injection of the polydimethylsiloxane leakage stoppage agent is stopped. The glue injection gun point is detached from the glue injection gun body, leaving the glue injection gun point in the leak so as to complete the leakage stoppage. The glue injection gun point used in the leakage stoppage process comprises a glue injection pipe, a thermal insulation layer, a quick connector and an air discharge duct. The method of the invention has the beneficial effects that the leakage stoppage for a leak with an irregular shape in a bent pipe can be realized; without drilling in a tank body, no permanent damage is caused to the tank body, so that it is convenient to repair the tank body; and leakage stoppage for low temperature liquid can also be realized.

Description

technical field [0001] The invention belongs to the technical field of on-site fast leak plugging, in particular to an emergency leak plugging method for a low-temperature liquid tank truck. Background technique [0002] A cryogenic liquid tanker is a vehicle used to transport cryogenic liquids. Cryogenic liquids include liquefied natural gas (-162°C) and liquid oxygen (-183°C). It is very dangerous in the event of leakage in the tanker carrying liquefied natural gas and liquid oxygen during transportation, and there is an urgent need for a method that can quickly and effectively plug the leakage at the accident site. The existing technology mainly includes two kinds of magnetic plugging technology and mechanical plugging technology. The disadvantage of these plugging devices is that the geometric shape of the plugging device must match the geometric shape of the leak point, because the geometric shape of the leak point is various , especially the leakage point with irregu...

AI Technical Summary

Problems solved by technology

Although it can effectively plug leaks with irregular geometric shapes, this method has the following disadvantages: First, paraffin is solid at room temperature, so paraffin is used as a low-temperature plugging agent. The fluidity of paraffin is poor and a large amount of water is required. pressure to press the paraffin into the

Secondly, due to the performance limitation of paraffin as a low-temperature plugging agent, it can only plug the capillary leakage of the thermal insulation lining, and cannot plug the large leakage hole

Again, this method requires drilling a small hole in the tank body of the tanker, which is very dangerous in the event of a liquefied natural gas leak if sparks are generated during the drilling process

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