2012 Figure undertake a profound quantitative loading control system Oil Suining Sichuan Petroleum Gas Field three light hydrocarbon means risk management, the project is two skid-mounted local loading, because it is skid-mounted form, all devices are integrated together to the scene just after the docking to the pipeline. The project quantitative loading control system industry requirements: Requirements static grounding when you start loading condition good contact with the tanker dock crane tight. Gas valve to open at startup, when the pressure inside the tank is equal pressure tank, liquid valves open, then start the pump for filling. When filling the remaining amount is equal to the amount of time for some off valve, liquid valve and a half off, loading the instantaneous flow rate. When filling the remaining amount is equal to the amount Sec off valve, liquid valve completely closed, the delay period of time, gas valve has been closed. End loading. Quantitative loading control system means the light hydrocarbon oil geyser field Suining three quantitative loading control system hardware configuration: The system hardware consists of intelligent control module, integrated LCD operator panel, 24V industrial power, explosion-proof control box and other components. Intelligent controller is complete data acquisition, conversion, output logic operation and control signals. Integrated LCD operator panel includes a keyboard and LCD screen, mainly for data entry and start, stop and other operations. Traffic data collection and totalizer AWZ quantitative loading type instrument can be connected according to user requirements of various flowmeters, flowmeter output signal is generally a pulsed mode, falling edge, the frequency range of 0-10KHz. For the convenience of users, can be reserved for 4-20mA Flow Interface. At the same time, set in advance the amount of the coefficient can be set in advance the amount of time (0-99 seconds) or flow advance (0-500 kg or liter), in order to achieve accurate send materials. Valves, pumps, control and back to the hearing: four valve control switch extended time (0-99 seconds or minutes) in accordance with the instructions panel by panel input, the set time is reached, loading instrument automatically open the valve, installed When the vehicle is completed, automatic loading device according to the delay time to close the valve. Start and stop control methods pumps and valves are also consistent, valves, switches, pump status with real-time graphical display on the control panel. Chains & Alarm: Level switch installed in the tank rated slightly higher than the level at the level when loading exceeds the rated level, reach the level switch mounting position, level switch signals, loading instrument close all valves, issue alarm tone, while displaying an alarm message on the control panel. In order to avoid the process of loading material and air friction caused by excessive accumulation of static electricity fires, requiring tankers have a good grounding system. After loading the device was started, first detected grounding alarm signals, such as greater than a predetermined ground resistance (100 ohms), is issued grounding alarm ringing, refused to carry out loading, while the control panel display grounding alarm information. Project implementation Results: Southwest Oil and Gas Field Branch Suining, Sichuan Petroleum Gas Field three light hydrocarbon means risk management quantitative loading system is developed profound FIG fourth generation of quantitative loading system, its technical specifications in full compliance with the new era of information and automation needs. System in use since 2012, three years running in good condition, any industrial accident not occurred, for the protection of PetroChina Southwest Oil and Gas Field Branch Suining light hydrocarbon plant safety and eliminate related risks played a great role and a strong impetus to the enterprise healthy and benign development. 

keywords: Control System,