System and method for off-line checking of safety valves of pressure containers and pipelines according to running state

Abstract

The invention discloses a system and method for off-line checking of safety valves of pressure containers and pipelines according to the running state. The system comprises a first forked type three-way valve, a substitute safety valve and a second forked type three-way valve. The method comprises the steps that a to-be-checked valve is installed on one side of the first forked type three-way valve, the substitute safety valve is installed on the other side of the first forked type three-way valve, and a discharging pipe of the substitute safety valve is connected with the second forked type three-way valve; the two forked type three-way valves are rotated at the same time, so that the first forked type three-way valve is communicated with one side of the substitute safety valve of the second forked type three-way valve; the to-be-checked safety valve is disassembled, and the to-be-checked safety valve is sent to an off-line safety valve checking table for setting; the to-be-checked safety valve obtained after setting is qualified is installed at the original position of the first forked type three-way valve; the two forked type three-way valves are rotated at the same time, so that the first forked type three-way valve is communicated with one side of the to-be-checked safety valve of the second forked type three-way valve; the substitute safety valve is disassembled, the process is ended, and the to-be-checked safety valve at the next position is checked.

Description

technical field [0001] The invention relates to a system and method for off-line calibration of pressure vessels and pipeline safety valves in operating states, which is aimed at pressure vessels and pressure pipeline safety valves in various operating states that are under pressure or contain dangerous media (liquid ammonia, hydrogen, etc.) Off-line calibration, while avoiding the operation of the pressure vessel when the safety valve is disconnected. Background technique [0002] Safety valve is a valve that prevents the pressure of the medium in the pipeline or equipment from exceeding the specified value by discharging the medium to the outside of the system when the pressure of the medium in the equipment or pipeline rises beyond the specified value. As a safety device to prevent overpressure of pressure vessels, its importance in the application of power plant boilers and pressure vessels is self-evident. In order to ensure the reliability of safety valves, national st...

AI Technical Summary

Problems solved by technology

However, due to various reasons, the operating cycle of pressure vessels in some fields is long, even far exceeding the safety valve calibration cycle, such as liquid ammonia storage tanks and hydrogen tanks in the public system of power plants; this has caused the safety of such pressure vessels and pipelines. The valve cannot be checked offline or disassembled for a long time.

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