Method and device for automatically controlling plate discharge at outlet of drying machine

Abstract

The invention provides a method and a device for automatically controlling plate discharge at the outlet of a drying machine. The method comprises the following steps: limiting sensors send sensing signals to a controller; the controller selects a current layer according to the order of the received sensing signal, sends a plate discharge instruction to a stopper actuating device and begins timing, and the stopper moves downwards; the time is delayed by t seconds after the sensing signal sent out by the limiting sensor of the current layer disappears and the controller sends a plate stopping instruction to the stopper actuating device; the stopper moves upwards and a plate stopping completion signal is fed back to the controller; the next layer is selected and plate discharge is repeated; when the time that the limiting sensor of the current layer continuously sends out the sensing signals reaches T, if the controller does not receives a plate stopping completion signal, the other layers are selected to repeat plate discharge; when the time that the limiting sensor of the current layer continuously sends out the sensing signals reaches T1, if the controller does not receives the plate stopping completion signal, an alarm device gives an alarm, wherein T1 is greater than T. if one layer is out of order, the other layers are automatically controlled to perform normal plate discharge; the operation efficiency of the drying machine is improved and the blockage of the drying machine is avoided; as a result, the drying machine is convenient to maintain and clear.

Description

technical field [0001] The invention relates to automatic control technology, in particular to an automatic control method and device for releasing plates at the outlet of a dryer. Background technique [0002] There are multiple layers of roller tables arranged from top to bottom inside the dryer. The gypsum board is dried when passing through the roller table inside the dryer, and then sent to the next process through the outlet through the conveying roller table. In order to ensure that the gypsum board is dried inside the dryer Fully dry, the rotating speed of the roller table inside the dryer is usually slow, while the rotating speed of the conveying roller table is relatively faster. The roller table of the coal seam dryer is equipped with shrapnel and stoppers at the exit, and each shrapnel stopper is connected. There is a limit sensor, and each stopper is connected with a cylinder. When a gypsum board is transported to the outlet, the shrapnel will be pressed down, t...

AI Technical Summary

Problems solved by technology

[0004] If there is a mechanical failure that has not been resolved, the rollers of the other layers of the dryer cannot be placed, the stopper actuator is damaged or the rollers have mechanical failures, and the maintenance time is usually longer, which will affect the operation of the dryer on the one hand, and then affect Production efficiency. On the other hand, the rollers of other layers of the dryer cannot discharge the boards, but they will always enter the boards. If the operator at the post does not deal with the alarm fault in time, the gypsum boards will be blocked in the rollers of the dryer, which is difficult to clean and costs a lot. manpower

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