Inlet and outlet pipe interlocking control device based on liquid level of gas tank

The utility model provides an inlet and outlet pipe interlock control device based on gas tank liquid level, which comprises a gas tank, a liquid inlet pipe, a liquid outlet pipe, a liquid level sensor, an electromagnetic valve, a volume adjusting mechanism and a PLC (programmable logic controller), the volume adjusting mechanism comprises an electric push rod, a moving plate, an air bag and an air pump, and the liquid level sensor is arranged in the gas tank. The liquid level sensor can monitor the liquid level in the fuel gas tank in real time, when the liquid level is low, the PLC can control the electromagnetic valve of the liquid outlet pipe to be closed, then fuel gas can be supplemented, in the supplementing process, if the fuel gas liquid level reaches the designated height, the PLC can control the electromagnetic valve of the liquid inlet pipe to be closed, and the fuel gas can be supplemented. The function of controlling the liquid inlet pipe and the liquid outlet pipe according to the liquid level