What is the working principle of the gas-liquid linkage
What is the working principle of the gas-liquid linkage
The gas-liquid actuator (Gas over oil actuator) is a mechanism that uses natural gas or an independent gas supply as power and hydraulic oil as a transmission medium to drive pipeline valves] to open and close. It is a device that guarantees the safe operation of oil and gas pipelines.
The power source of the gas-liquid linkage actuator is directly taken from the high-pressure natural gas of the independent pipeline. After the natural gas is filtered, it does not need any pressure reduction, and directly enters the gas tank for storage through the high-pressure shuttle valve and the one-way valve. The use of integrated modules, large flow, high pressure design technology enables fewer control components to withstand high pressure, prolongs the life of the seal, reduces piping, and reduces system leakage points, thereby improving the overall safety of the equipment.
composition
● Mechanical drive mechanism: Linked with the valve, receiving hydraulic power, and outputting the drive torque required by the valve [].
● Pneumatic-liquid conversion mechanism: When the actuator moves, the pneumatic power is converted into hydraulic power. , Fluid control single play: By controlling the on and off of the gas-liquid circuit, a variety of valve switching methods are realized.
●Sub control unit: real-time monitoring of pipeline pressure parameters, automatic cut-off in emergency situations, and also has functions such as human-computer interaction and data recording. Features
●Basic functions
On-site pneumatic switch valves, on-site manual hydraulic pump switch valves. When there is no power gas or the power gas is insufficient, the valve can be manually opened and closed manually; when the power gas meets the requirements, the valve can be manually opened and closed.
Broken pipe protection (lock reset)
When the channel pressure or the pressure drop rate exceeds the set value and reaches the valve action condition, the gas-liquid linkage actuator will automatically switch the valve.
ESD emergency shutdown (lock reset)
ESD English Emergency Shutdown, which means emergency shutdown, that is, when an emergency occurs, system protection is realized and the gas-liquid linkage is in a fail-safe position. The single-ESD of gas-liquid linkage means that only one device is involved in the emergency action of the gas-liquid linkage; in addition, the ESD interlocking uses the gas-liquid linkage as one of the control objects, which will protect the entire system during the action.
Conditions of use: Continuous and stable 24VDC power supply, when the on-site power supply cannot be guaranteed, the gas-liquid linkage with ESD function can be used to increase solar power or diesel power and other power supply methods; power gas source. Remote switch valve
The gas-liquid linkage remote switch needs to be equipped with solenoid valves, and at the same time it needs to be connected to SCADA, RTU and other automated control systems. RTU valve chambers, entry and exit station valves, over-station bypass valves, etc. of long-distance pipelines can be equipped with such functions. The remote valve can be opened or closed separately.
