Control system and control method for U-shaped water seal of gas pipeline

Abstract

The invention discloses a control system and control method for a U-shaped water seal of a gas pipeline. The control system for the U-shaped water seal of the gas pipeline comprises a pipeline assembly, a probe assembly, an electromagnetic valve assembly and a PLC, wherein the pipeline assembly comprises a water inlet pipe, a drainage pipe, a high overflow pipe and a low overflow pipe; the probe assembly comprises a first probe and a second probe which are arranged on the high overflow pipe; the first probe is used for monitoring whether the water level in a U-shaped pipe section reaches the first height water level or not, the second probe is used for monitoring whether the water level in the U-shaped pipe section is lower than the second high water level or not, and the first height water level is located above the second height water level; the electromagnetic valve assembly comprises a first electromagnetic valve and a second electromagnetic valve which are arranged on the water inlet pipe; the first probe, the second probe, the first electromagnetic valve and the second electromagnetic valve are all in communication connection with the PLC; and the PLC can control opening and closing of the first electromagnetic valve and the second electromagnetic valve. The control system has the advantages of being high in control efficiency and good in safety performance.

Description

technical field [0001] The invention relates to the technical field of gas pipeline partitions, in particular to a gas pipeline U-shaped water seal control system and control method. Background technique [0002] Generally, the gas pipeline in the gas cabinet area is equipped with a U-shaped water seal to cut off the connection between the gas facility and the main network. The diameter of the U-shaped water seal varies from 1.2 meters to 3.2 meters. The U-shaped water seal of the gas pipeline is an important part to ensure the production safety of gas storage and gas transportation. [0003] In the prior art, the U-shaped water seal of the gas pipeline is replenished by manually operating the valve to open and close, and there is no device for detecting the running state of the U-shaped water seal on site. The manual control of the U-shaped water seal has the following disadvantages: 1. The unattended on-site mode is realized in the cabinet area, and the operating status o...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the U-shaped water seal of the gas pipeline is manually operated to open and close the valve for water replenishment, and there is no device on site to detect the operating state of the U-shaped water seal

The manual control of the U-shaped water seal has the following disadvantages: 1. The unattended on-site mode is realized in the cabinet area, and the operating status of the U-shaped water seal depends on the regular on-site inspection by the operator to know whether it is short of water; 2. When opening and closing the U-shaped water seal, it is necessary to manually switch the valve on site to replenish water or drain water, and the operators are concentrated in the centralized control center far away from the operation site. The efficiency of manual operation is low, and it is difficult to control the valve switch in time , it is easy to make the U-shaped water seal unable to replenish water in time, resulting in gas leakage; 3. When operating the valve switch, the operator is required to have a strong sense of responsibility, and the reliability is low; 4. The cabinet area is a major hazard area. Personnel need to enter the cabinet area frequently. Once the gas equipment and facilities in operation cause gas leakage due to aging and other reasons, safety accidents of gas poisoning are very likely to occur, and there are great safety hazards

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