Long tube trailer safety relief device easy to predict pressure relief

Abstract

The invention relates to the technical field of safety valve equipment, and discloses a long tube trailer safety relief device easy to predict pressure relief. The device comprises a mounting seat connected with a gas cylinder relief port, a truncated cone-shaped cut-off plug is arranged in the mounting seat, and a sealing seat matched with the cut-off plug is arranged on the inner wall of the mounting seat. According to the long tube trailer safety relief device easy to predict pressure relief, when the temperature of a ferromagnetic substance is higher than the Curie point, the magnetic field is reduced along with the temperature rise, that is, along with the temperature rise, the magnetic field size of a magnetic flow channel can be accurately predicted, so whether the temperature rise or the pressure rise, whether the positioning nail needs to retract or not can be accurately predicted, and arrangement for in-situ rescue isfacilitated. And meanwhile, due to the fact that the bearing capacity of a positioning nail is far higher than that of a thin rupture disk, the relief device is higher in reliability, and due to the fact that pressure relief can be triggered at high pressure or high temperature, when an accident happens, response can be more timely, and the risk of gas cylinder explosion in the accident is reduced.

Description

technical field [0001] The invention relates to the technical field of safety valve equipment, in particular to an easily predictable pressure relief safety relief device for long-tube trailers. Background technique [0002] The long-tube trailer is an important mobile pressure vessel. Each cylinder of the long-tube trailer needs to be equipped with a separate release device. When it is in an abnormal working condition or in a high-temperature fire environment, the high-pressure gas will be discharged through the safety release device to protect The long tube trailer body does not explode. [0003] The safety release device of long-tube trailers is generally a single bursting disc or a combination of bursting disc and fusible plug, but the shortcoming of the bursting disc is that the bursting disc is subjected to repeated alternating loads during the inflation and deflation process, and is easily damaged and invalid; The disadvantage of the combination of the rupture disc a...

AI Technical Summary

Problems solved by technology

[0003] The safety release device of the long-tube trailer is generally a single bursting disc or a combination of a bursting disc and a fusible plug, but the shortcoming of the bursting disc is that the bursting disc is subjected to repeated alternating loads during the inflation and deflation process, and is prone to damage and failure; The disadvantage of the combination of the rupture disc and the fusible plug is that since the burst pressure of the bursting disc and the melting temperature of the fusible plug are both in the same range, the release time cannot be predicted by the temperature change and pressure change, which is not conducive to fire rescue

[0004] Secondly, when the rupture disc and fusible plug are used in combination, since the fire location may be far away from the fusible plug, there will be a long time lag in the melting of the fusible plug, which increases the time for the gas cylinder to be exposed to the high-temperature environment of the fire and the explosion of the gas cylinder risks of

Images