The automatic batching system is used as a central control area to complete the whole process of weighing and feeding. Before the equipment is equipped, the staff will open the switch, and the PLC central control area will send a signal to start the corresponding solenoid valve to inject the material into the reactor. At the same time, the weighing module will start to work. When the amount of the reaction tank is increased to the equivalent of the weight set by the quantitative setting reference, the central control area receives the action signal of the weighing module, and immediately closes the solenoid valve for adding materials and stops adding materials.
020-34563445Weighing Control System Operation Sequence Overview During the normal operation of the system, the powder reaches the top of the conveying bin pump through other equipment and is deposited in the buffer hopper. Through this system the powder is conveyed to the silo to which the piping is connected. This conveying system used for the pneumatic system system pump.
In the initial state of the feeding system, the discharge valve is normally open, after the system is started, the discharge valve is closed, while the exhaust dome valve will be opened so that the air is discharged from the pump, at this time, the discharge dome valve on the pipeline is closed to prevent the air from being sucked into the dust collector through the conveying pipeline, and after that, the inlet dome valve of the silo pump is opened, and at the same time the hopper pneumatic valve is opened, and the material falls into the pump under the force of gravity. During the filling process when the bin pump level gauge is overridden to show that the pump is full of material, after a short delay so that the pump is completely filled, then the feed is immediately closed and sealed, after a short delay the exhaust dome valve is closed. When both the feed and exhaust dome valves have closed and sealed, the discharge dome valve opens with the air inlet valve. Compressed air is then fed to all the feed pumps to pipe the material to the magazine. When the material has been conveyed to the magazine, a signal is given for a pressure drop in the conveying piping, and the conveying air valve closes, completing one cycle.
When starting a conveyor cycle, the dosing control system will check to see if the following cycle start interlock conditions are fully met: whether the "Conveyor Start" button on the host computer screen has been pressed. (For "purge start" the purge start on the host computer screen is pressed.) The "Local/Remote" knob on the local control box mounted on the bin pump is in the "Remote" position. The inlet and exhaust valves are closed and sealed. The blocking valve closed in place signal is true. The open in place signal is true when the discharge valve opens (if not, the system will not open the inlet valve when the discharge is complete). Cycle timer has completed. The bin high level meter is not true. When all of the above conditions are true, the system conveyor will operate.
When the hopper is not being fed, try not to blow back as often as possible as the pump is holding pressure, as this will affect the seal life. If you have to blow back to the warehouse pump pressure to 1.5 kg to open the feed valve, open the feed valve warehouse pump pressure can not exceed 1.5 kg. When the system is conveying, if there is pipeline leakage without major danger things happen, can not switch the system directly to the manual position. Nor can the system stop power, gas. In the need to stop when the system can be switched to the system stop position, so that the system is free to stop. Other operations can be performed after the system has stopped. Due to the system operation in recent days the seal is damaged, may be the pump is loaded too full, the material in the warehouse pump time is too long caused by the temperature inside the warehouse pump to maintain too high or scalding, as far as possible, the cycle time is set to be longer, the feed time is set to be shorter, the feed time in 15 seconds can be. Warehouse pump near the cable as far as possible from the original warehouse pump body, close to the need to do isolation measures to prevent the warehouse pump high temperature scalding damage to the cable caused by a short circuit.
Pipe clogging treatment in the conveying process, when the conveying time is more than 2-3 times the normal conveying time and more than 30 minutes, conveying pressure is high and there is no obvious downward trend, the conveying is judged to be a failure (both the occurrence of pipe clogging).
