Clearance frequency-conversion electrical high and low speed control device and method of blanket feeder

Abstract

The invention discloses a clearance frequency-conversion electrical high and low speed control device and method of a blanket feeder. The device is composed of a power supply, an air circuit breaker, an intermediate relay, a rotation detector switch, an adjustable resistor, a time delay relay and a frequency converter, wherein a normally open contact of the intermediate relay is linked with the rotation detector switch on a rotation bent axle; the adjustable resistor is connected with the frequency converter through a delay contact of the time delay relay; the resistance value of the adjustable resistor is adjusted to be maximum; the power supply is connected with the air circuit breaker which is linked with coils of the time delay relay through the normally open contact of the intermediated relay; the resistance value of the adjustable resistor is slowly reduced to observe the changes of forward and backward speed and frequency of the feeder until a feeding surface becomes flat. The control device can be used for adjusting the charging of the kiln feeder without influencing normal production, and has the features of maintaining the constancy of a liquid level and furnace pressure of a glass kiln.

Description

technical field [0001] The invention relates to the technical field of production of solar photovoltaic glass, in particular to a gap frequency conversion high and low speed electrical control device and method for a blanket feeder. Background technique [0002] At present, the production process of solar photovoltaic glass is that the prepared raw materials are melted in a kiln, calendered and formed by a calender, annealed in an annealing kiln, and the production is completed through longitudinal cutting, cross cutting, edge breaking, longitudinal splitting, and inspection. The function of the feeding machine is mainly to transport raw materials for the kiln, and feeding raw materials into the kiln is the primary link in the entire production process. According to different application needs, the feeding methods mainly include: screw feeder and blanket feeder, among which the blanket feeder consists of a feed hopper, motor, reducer, gear coupling, chain, drive arm, feeder ...

AI Technical Summary

Problems solved by technology

Since the advancing and retreating frequencies of the feeding blanket board are consistent, the glass at the feeding port is in a molten state and has fluidity, which has the following disadvantages: ① When the feeding table moves forward, the glass raw material at the feeding port enters the furnace, and the glass liquid level rises, and the longer the advancing time Short, the greater the fluctuation of the liquid level, it will also have a certain impact on the furnace pressure. ②When the feeding table retreats, the liquid level also retreats, and the newly input raw materials will float above the glass liquid, and it is easy to form a material pile, which is not conducive to the glass. melt

③ To change the feeding frequency of the feeder, it needs to be changed through the PLC program, which will cause the feeder to stop

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