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Working principle of pneumatic vacuum feeder and reasons for failure to suck materials


Pneumatic vacuum feeder is a dust-free, closed pipeline conveying equipment, which uses vacuum suction to transport powder materials. The device makes use of the air pressure difference between vacuum and surrounding space to form air flow in the pipe to drive the movement of powdery materials, thus completing the delivery of materials.

气动上料机原理图

At present, most pneumatic vacuum feeders use pneumatic vacuum pumps as vacuum sources. The materials in the container can be directly sent to the mixer, reactor, hopper, tablet press, bag, vibrating screen, granulator, wet granulator, dry granulator, etc. This can reduce the labor intensity of workers and eliminate dust pollution.

After the “ON/OFF” button of the pneumatic vacuum feeder, the compressed air enters the vacuum pump. With the push of the cylinder, the outlet valve of the hopper is closed to form a vacuum state in the hopper. The vacuum machine forms air flow in vacuum. The conveyed materials are conveyed to the vacuum hopper through the hose under the action of air flow.

For some time, the compressed air was turned off, and the pneumatic vacuum pump could not generate vacuum. At the same time, the outlet valve of the hopper is opened under the push of the air cylinder, the vacuum of the vacuum feeder disappears, and the materials automatically enter the receiving port from the outlet. At the same time, the compressed air in the air bag is blown back to the filter screen, and the filter is automatically cleaned.

After a period of time, the compressed air is restarted, the pneumatic vacuum pump generates vacuum, the discharge port is closed, the vacuum feeder feeds again, and the materials are continuously sent to the receiving equipment.

In a word, the above is the working principle of the pneumatic vacuum feeder. It adopts closed conveying mode. This transportation mode can eliminate the pollution of dust on the environment, improve the working environment, reduce the environmental pollution of natural environment and workers on raw materials, and improve the cleanliness level. The product is transported by pipeline, covering a small area, and can complete powder transportation in a narrow space; In particular, it is not limited by long distance and short distance. Vacuum conveying can also reduce manpower and improve work efficiency.

The vacuum feeder mainly uses the air pressure difference inside and outside the equipment to transport materials. Working with suction force, it can mainly transport powder or granular materials. The pneumatic vacuum feeder has become the equipment that will be used by major enterprises. However, enterprises may find that the equipment cannot suck materials in the process of use. What’s the reason for that?

Cause 1: The pneumatic pump is damaged

If it is found that the pneumatic vacuum feeder is unable to suck materials, it is mainly because the pneumatic pump in the equipment is damaged. Once the device is damaged, it will lead to the problem of unable to suck materials, mainly because of insufficient pressure. Therefore, it is important to check the pneumatic pump in the equipment first to find out whether the device is damaged, and timely repair or replace it.

Cause 2: Incorrect operation

The pneumatic vacuum feeder has very strict operation requirements. If the installation or operation does not meet the corresponding requirements, it will directly have a certain impact on the delivery of materials, which will lead to the situation that materials cannot be sucked. Therefore, during the operation process, attention should also be paid to the use of equipment according to the correct specifications.

Not only that, for pneumatic vacuum feeder equipment, if there are some errors in parameter settings, it will also affect the use effect of the equipment. Therefore, the user should try to find out the specific reasons, find out what problems are causing the equipment to fail to suck materials, and then solve them accordingly.