The liquid tank filling and Filling machine calculates the pulse signals of the pipeline flow rate through the Electronic scale, obtains the actual liquid weight discharged by the Weighing system, and controls the motor operation based on the difference between the actual filling volume and the set value, thereby achieving precise control of the filling volume according to actual needs. The automatic filling machine is mainly composed of DC variable frequency motors, centrifugal pumps, weighing instruments including touch screen control boxes, filling machinery, cylinder filling guns, filters, pneumatic ball valves, etc. The weighing system is mainly composed of PLC, Filling system, weighing instruments, and touch screens. By calculating the liquid volume through the electronic scale, introducing the data of the sensor into the control system to control the motor operation, real-time monitoring of the liquid output volume can be achieved. The filling system mainly completes the collection of data from the electronic scale, displays the data on the touch screen, accepts the input of potentiometer data, and controls the stable operation of the system through control relays and pneumatic valves, including main programs, sensor data collection sub-programs, timer interrupt service programs, and LCD display sub-programs, etc. After the weighing instrument enters the program control, it first detects the mode button to determine the working mode of the system, acquires the set value of filling through AD, and then opens the relay. The motor operates to collect the pulse number from the sensor and displays it in real time on the LCD. When the filling volume corresponding to the pulse number reaches the set value, the relay is closed to cut off the motor drive circuit. In the quantitative filling control, the electromagnetic valve contact switch of the filling gun in the circuit remains in the closed state, and the electronic scale displays the current filling volume. 

The weighing filling machine transports the empty barrels to the filling position, aligns the barrel opening and the spray gun opening, and presses the "start" button. The spray gun moves into the barrel under the drive of the cylinder. When the spray gun is detected to be in place, the bottom valve opens, and the nitrogen charging valve starts to fill the dry nitrogen through the filling port into the barrel, replacing the air inside the barrel with nitrogen and accelerating the drying of the barrel inner wall to ensure the safety of filling. During nitrogen charging, it is necessary to ensure that the air in the container is replaced. The exact amount of nitrogen charging can be adjusted through the weighing instrument. After the nitrogen charging quantity is determined, the nitrogen charging valve is closed, and the weighing instrument automatically removes the empty barrel weight from the scale, then both the slow and fast feeding ball valves are opened simultaneously; first, the material is added quickly, the spray gun stays at the lowest position for a period of time before starting to rise below the liquid level for filling, and stays at three positions along the center as the liquid level rises, then stops at the barrel opening, and then adds material slowly; when the filling volume reaches the preset advance volume, the ball valve and bottom valve are closed; the spray gun rises outside the barrel; the vacuum suction device starts to ensure no residual liquid droplets leak. All the sealing parts of the pipeline adopt polytetrafluoroethylene material sealing to meet the no-leakage requirements. After the material filling and filling are completed, the full barrel is manually pushed to the real barrel conveyor belt, and the manual pneumatic cap is tightened; the filled real barrel is pushed to the bucket unloading buffer position; the forklift transports the packaged barrels away. At the end of each shift of filling, a material bucket is placed under the filling head, the manual material feeding valve is closed, and a filling process is performed once, discharging the material, and shutting down the machine to restore the equipment to its initial state. 

The Liquid filling machine continuously conveys materials through a rotor pump for automatic weighing equipment. When the rotor pump conveys the materials, the weight load platform on the weighing section acts on the electronic scale. The electronic scale converts the weight into an electrical signal and sends it to the weighing instrument for amplification, filtering, A/D conversion, and transformation into a digital signal. The speed signal of the rotor pump operation is converted into a pulse signal and sent to the weighing instrument. The weighing instrument then calculates the set weight of the materials and displays it. The electronic scale of the rotor pump uses a standard control cabinet, which contains a PLC frequency converter controller and its corresponding relays and other related control instruments. The height of the rotor pump head and the position of the flatbed truck are respectively connected to the control cabinet after being measured and inspected by the electronic scale, and then directly controlled by the PLC controller for frequency conversion of the motor and the solenoid valve of the oil cylinder. By modifying and setting the parameters of the controller, the height and weight of the filling gun can be effectively controlled, thereby achieving the effect of automatic weighing filling.