The working cycle of the vacuum feeder consists of four stages
The entire device of the vacuum feeder is designed to match the corresponding air source pressure, warehouse pump and pipe size according to the material delivery volume. Silo pumps are used as conveying devices. Every time the material passes through the warehouse pump, it is a working cycle.
1. Feeding stage: The feeding valve is normally open, and the material falls freely into the feeding barrel under the action of gravity. There are two situations in the feeding stage: first, when the material accumulates to a certain height and hits the material level meter, the material level meter sends a signal and the feeding valve automatically closes to complete the feeding process; second, when the feeding time is less than the design time, The feed valve signals in advance. During this feeding process, material bridging should be avoided.
2. Fluidization stage: the inlet valve opens automatically. When the compressed air enters the shell and continuously diffuses through the fluidization plate, it ensures that the material particles are evenly surrounded by air and increases the pressure in the fluidization plate so that the material particles are not blocked. The key technology of this process is to ensure that the material particles in the fluidized tray are not blocked.
3. Conveying stage: the pressure inside the conveying casing continues to rise. When the set value is reached, the pressure sensor sends a signal and opens the discharge valve. When the material is sent out from the fluidized tray, the material level in the housing is reduced, which strengthens the fluidization of the material in the fluidized tray, so that the whole conveying stage is in the state of fluidization and conveying at the same time.
4, purging stage: After the material particles are transported, when the pressure inside the casing drops to the air pipe pressure, the pressure sensor sends a signal to promote the purging pipe to continue purging for a period of time, and then close the inlet valve. When the pressure in the cylinder is atmospheric pressure, close the ash circulation outlet valve.
Advantages of vacuum conveyor pipeline closed conveying
1. This transportation method can eliminate dust environmental pollution, improve the working environment, while reducing the pollution of the environment and personnel to materials, and improving cleanliness;
2. Because it is transported by pipeline, it occupies a small space and can complete the powder transportation in a small space, making the workshop space beautiful and generous; it is not limited by long or short distances.
3. The vacuum loading machine can reduce manual labor intensity and improve work efficiency;
It is the first choice for conveying most powder materials.
Application:
1. Plastics: polyethylene pellets, polystyrene pellets, polyurethane pellets, recycled rubber, ethylene-propylene pellets.
2. Food: spice powder, baking agent, beans, edible mushrooms, cheese powder, cocoa powder, coconut, crystallized sugar, curry powder, juice powder, lactose, purple flower, alfalfa, pepper, starch, baking powder.
3. Chemistry: activated carbon powder, aluminum chloride, aluminum hydroxide, zinc stearate, filter cake, sodium, bentonite, calcium carbonate, diatomaceous earth, soot, iron powder, tungsten powder, silicon carbon, diamine Silica, dicyandiamide powder, zeolite.
4. Pigments and coatings: dye powder, epoxy resin, acrylic polymer, titanium dioxide, toner powder, polytetrafluoroethylene powder.
5. Metal powder: aluminum powder, cobalt powder, iron powder, tungsten powder.
6. Others: clinker cement, grape seeds, casting auxiliary materials, welding powder, quartz particles, sand, gravel.
*Materials not recommended for transportation:
Clumped, moisture-containing, overweight or oversized materials such as feathers, metal particles, etc.
