ZKJ vacuum feeder uses a vacuum pump to extract air, so that the inlet of the suction nozzle and the entire system are in a certain vacuum state. The powder particles are sucked into the nozzle along with the external air, forming a material airflow, which passes through the suction pipe to reach the hopper, where gas and material are separated. The separated materials enter the receiving equipment.
Feeding and discharging are achieved through the continuous opening and closing of pneumatic three-way valves, which are controlled by the control center.
The vacuum feeder is equipped with a compressed air blowback device. Each time the material is discharged, the compressed air pulse blowback the filter to knock down the powder adsorbed on the surface of the filter, ensuring that the suction can operate normally.
For vacuum feeders with level control, the material in the hopper of the receiving equipment is automatically fed through the level controller. When the hopper of the receiving equipment is higher than a certain position, the vacuum feeder stops feeding; When the material level is lower than a certain position, the vacuum feeder automatically starts to complete the feeding of the receiving equipment.
2、 Technical parameters
Explanation: The above output is the maximum output, measured when the conveying distance is 5 meters and the conveying material is flour. The longer the conveying distance, the lower the conveying capacity. In addition, the output of transportation is also closely related to the characteristics of materials.
3、 Debugging and installation
Before using this device, please confirm that the compressed air source is clean and dry, with a working pressure of 0.4-0.6mpa
1. The hopper of the feeding machine is usually fixed on the receiving equipment or on the hand-operated lifting trolley. When fixed on the hand-operated trolley, the hopper can move up and down. Adjust the position of the feeding machine hopper according to the height of the receiving equipment. When the hopper of the receiving equipment (such as packaging machine) is high, a separate bracket needs to be made to fix the hopper of the vacuum feeding machine.
2. Connect the suction nozzle to the hopper and the hopper to the vacuum pump with a hose, and clamp them tightly with a hose clamp.
3. Connect the power supply. The power supply should use a three-phase five wire cable because the control circuit requires "working 0", and for safety reasons, "protecting 0" is still needed. Another function of "protecting 0" is to eliminate the interference of static electricity generated during material transportation on the control chip, which may cause the control system to crash. Therefore, "protecting 0" must be connected.
4. Insert a Φ 10 compressed air pipe into the system inlet (for filtering and pressure reduction), adjust the pressure reducing valve to ensure that the system pressure is maintained at 0.6M pa, and connect the external compressed air pipe joint to the external compressed air joint on the vacuum hopper according to the connecting pipe diagram.
5. Connect the power, open the box door, and close the three-phase air switch. At this time, the control box's loading and discharging time displays will light up.
6. Adjust the loading and unloading time. Set the feeding time to 8-20 seconds and the discharging time to 4-8 seconds by touching the increase and decrease buttons.
7. Press the on/off button to turn on the vortex air pump. Check the direction of the vacuum pump. If there is no air discharged from the exhaust port, the motor should be reversed. Turn off the on/off button and switch the wiring phase sequence of the power supply until the air pump rotates correctly.
8. Press the on/off button to start the vortex air pump, insert the suction nozzle into the material box, and then start feeding. The suction discharge (while compressing the air back blowing the filter) is a working cycle. The vacuum feeder will automatically cycle until the material in the hopper of the receiving equipment (such as the packaging machine) is filled (at this time, the material level switch will light up).
9. When the material level in the hopper of the receiving equipment is lower than the level switch, the pneumatic three-way valve automatically changes direction, and the system enters the suction discharge cycle again until the material in the hopper is full.
10. During the material conveying process, significant static electricity may be generated due to friction. In order to eliminate static electricity, reliable grounding of the equipment casing should be considered.
4、 Cleaning
1. Open the clamp, remove the vacuum hopper, and clean it layer by layer.
2. Open the cover assembly and remove the filter component for cleaning.
3.1 Polyester film filter or PE filter: Remove the filter component, brush off surface attachments with a soft bristled brush, and then use compressed air to blow inside and outside multiple times. After blowing clean, reassemble and use. Regular blowing and maintenance can extend the service life of the filter. When the feeding amount of the feeder decreases significantly, the filter needs to be replaced.
3.2 316L stainless steel filter or titanium metal filter: Remove the filter component, place the filter and filter disc as a whole in a cleaning pool, soak in warm water for five minutes, clean the surface of the filter with a soft brush, and then blow it with compressed air to remove the moisture inside the filter, or place the filter in an ultrasonic cleaner for cleaning. Repeat this process 2-3 times until it is completely cleaned. Afterwards, let it air dry naturally in a well ventilated area, or place it in a drying oven set to 50 ℃ for drying treatment. Do not reuse until completely dry.
3. Remove the sealing ring of the flap door and the sealing ring of the bucket body for cleaning.
4. Rinse all components of the vacuum hopper thoroughly with clean water.
5. Open the secondary filter barrel on the vacuum pump/Roots blower, remove the secondary filter element, and blow out the material in the folds of the filter element with compressed air.
