Valve packing seal monitoring device with self-checking function

Abstract

The invention discloses a valve packing seal monitoring device with a self-checking function, a seal detection mechanism is connected with a gas outlet end of a to-be-detected section, gas enters the seal detection mechanism through the to-be-detected section, and a detection assembly generates and sends an electric signal after detecting that gas exists in the seal detection mechanism; a gas supply port of the gas supply mechanism is connected with the to-be-detected section, and the gas supply mechanism intermittently pumps self-detection gas into the sealing detection mechanism; a remote service mechanism receives the electric signal sent by the detection assembly, and performs self-inspection judgment and gas leakage detection judgment according to the electric signal; the method comprises the steps that the remote service mechanism sends a gas supply instruction to the gas supply mechanism, the gas supply mechanism receives the gas supply instruction and pumps self-inspection gas into the seal detection mechanism, and if the remote service mechanism receives the self-inspection electric signal sent by the detection assembly, it is judged that the monitoring device operates normally; otherwise, it is judged that the monitoring device is in an abnormal state. According to the invention, the functions of device self-inspection judgment and valve leakage on-line detection are realized.

Description

technical field [0001] The invention relates to the research field of detection technology for medium leakage in valves, in particular to a valve packing seal monitoring device with a self-test function. Background technique [0002] Valves are widely used in the process industry, especially in the fields of chemical industry and nuclear power. It is an important part of various pipe network systems. It controls the operating status of the system, connects the main and auxiliary equipment and systems of the power station, and has a vital impact on the normal operation of the system. Among them, the nuclear power valve is a large number of medium transmission control equipment used in nuclear power plants. It connects many systems in the entire nuclear power plant and has functions such as cut-off, adjustment, flow diversion, anti-backflow, voltage stabilization, diversion or overflow pressure relief, etc. It is a safety valve for nuclear power plants. It is an indispensable...

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to solve the problem that the existing monitoring device for medium leakage in the valve does not have an online self-check function and cannot be industrialized, and to provide a valve packing seal monitoring device with a self-check function. When the electrical signal is not received, the monitoring device is self-inspected and determined. The self-inspected determination method includes: the remote service mechanism sends an air supply instruction to the air supply mechanism, and the air supply mechanism receives the air supply instruction, and pumps air into the seal detection mechanism. Self-inspection gas, the self-inspection gas enters the gas-collecting component of the sealing detection mechanism, and the self-inspection gas forms bubbles in the ionic liquid. After the detection component detects the bubbles, it generates a self-inspection electrical signal and sends the self-inspection electrical signal to the remote service Institution, the remote service organization receives the self-inspection electric signal and judges that the monitoring device is operating normally; otherwise, it judges that the monitoring device is operating abnormally; when the monitoring device is in normal operation, it will perform a gas leak detection judgment on the section to be detected, and control the gas supply mechanism to stop running , the gas leak detection determination method includes: if the gas collection component collects the leaked gas, the leaked gas forms bubbles in the ionic liquid, after the detection component detects the bubbles, generates a leak electrical signal, and sends the leak electrical signal to the signal processing component, the signal After the processing component receives the leakage electrical signal and calculates the detection result, it sends the detection result to the remote service organization, and the remote service organization receives and displays the detection result, and determines that the segment to be detected is leaked; otherwise, it is determined that the segment to be detected is not leaked

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