Concrete Electric Pole Centrifugal Spinning Machine
Centrifuge force is generated when concrete electric pole mould spun by concrete pole centrifugal spinning machine is equal or a little higher than weight of concrete. Concrete can be sedimentated and distributed to concrete spun pole mold inner wall without collapse overcoming the effect of gravity. When spinning speed continue rising, the material particles in concrete mixture is extruded to all around of concrete electric pole mould inner wall along the centrifuge force direction to even compacting formation. Its production process are 3 steps:
1.Low speed: 2-3min, concrete will be distributed along concrete spun pole mould inner wall without collapse.
2.Medium speed:0.5-1min, it is a transition stage from low speed to high speed to prevent concrete structure damaged in centrifugal spinning process.
3.High speed:6-15min, concrete is extruded to concrete electric pole mould inner wall along the centrifuge force direction to even compacting formation and eliminate additional water. Spinning time and spinning speed of each stage is different as per to specification and type of concrete electric pole mold, its spinning speed picture is shown in picture 1:
Picture 1 concrete spun pole centrifugal spinning machine spinning picture
Three-phase shunt motor is widely used for concrete sun pole centrifugal spinning machine in concrete pole factory. Small starting current,big starting torque and speed can be controlled are the characteristics of commutator motor. But there are many deficiencies of commutator motor such as complicated structure, difficult to switch direction, high maintenance cost, complicated adjustment, difficult to adjust no-load current graph. Big sparks will generated on commutator surface when operating which will effect motor normal operation and shorten motor operating lifespan. With long time running, we found that communtator will be worn seriously with many years operation. Communtator and carbon brush should be replaced and worn almost each month, average trouble-free continuous operating time shortened and winding is easy to be burnout caused by improper adjustment which increase production cost. In addition, spinning speed changed by workers manual adjust commutator motor speed change mechanism, high human factors which can’t be guaranteed to execute production process and standard strictly when concrete pole is forming. This leaves a lot hidden danger to production quality. Thinking of the reasons above, three-phase asynchronous frequency variable motor with frequency converter are used to upgrade centrifugal spinning pole machine for concrete electric pole factory.
A complete concrete electric pole factory is composed of centrifugal spinning concrete pole machine, concrete spun electric pole mold, concrete mixing machine, concrete feeding machine, prestressing machine etc. Furat 20 years' EPC experience in concrete pole plant will save much time and cost for your concrete pole plant.
TAG:   Spinning Pole Machine Concrete Pole Machine