| 摘要 |
A dust conveyor, which is intended for collecting and conveying the dust from conveyor belts, is equipped with a control system which is accommodated in the cylinder cover of the working cylinder. A main control slide valve is provided at right angles to the piston rod and controls the pressure medium feed to the piston-rod- and piston-side cylinder space. It is itself reversed by means of a piston-actuated auxiliary control slide valve which is provided with control bores. After the end position of the piston has been reached, the latter is reversed by means of the auxiliary control slide valve and the main control slide valve, a renewed reversal then taking place when the auxiliary control slide valve is again pushed in by means of the piston rod and a driver arranged at the end. <IMAGE>
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