Precast Concrete Electric Pole Plant Machine
Precast Concrete electric pole plant machine
mainly include centrifugal machine and concrete electric pole mold. Centrifuge force is generated when concrete electric pole mould rotating with concrete pole centrifugal machine is equal or a little higher than weight of concrete. When rotation speed continue rising, the materials in concrete is extruded around concrete electric pole mould inner wall along the centrifuge force direction to compacting formation.
Precast concrete pole plant centrifugal process are 3 steps: 1.Low speed running: 2-3min, concrete will be distributed along concrete electricity pole mould inner wall without collapse.
2.Medium speed running :0.5-1min, it is a transition stage from low speed to high speed to prevent concrete structure damaged in centrifugal rotation 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.Centrifuge time and centrifugal speed of each stage is different as per to specification and type of concrete electric pole mold.
Picture 1 concrete spun pole centrifugal spinning machine rotation picture
For precast concrete pole centrifugal machine driving system ,three-phase frequency variable motor is widely used for concrete electric pole centrifugal machine in concrete pole factory. with long time running, we found that commutator will be worn seriously with many years operation. Commutator 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, rotation 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 rotation pole machine for concrete electric pole factory.
Precast centrifugal spinning concrete electricity pole machine is specially designed and manufactured for prestressed and reinforced concrete poles used for HV, LV power transmission overhead lines with length from 10m to 18m. Precast centrifugal spinning pole machine is most important equipment for concrete spun pole production plant. It generates centrifugal spinning force by rotating concrete spun pole mold with different range rotation speed. During high speed rotation, water in concrete will be pressed out and concrete will get compacted and dense. By this process, concrete strength will reach standard request. After steam curing process , concrete pole will reach full standard request for concrete pole loading test .
Precast Centrifugal spinning concrete electricity spun pole molding machine is composed of mainly casting steel base, driving shaft, bearing seat, belt wheel and base, frequency variable motor and control cabinet.
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