| 摘要 |
A circuit for controlling of a pneumatic winch operation hauling a cable cart in extended heavily inclined walls, characterised in that it is composed of three blocks, of which a revolution direction sensor block consists of three reed-relay contact systems (KL, KS, KP) spaced on the circumference of fixed part of the wheel and of a permanent magnet (NS) located above these contact systems on a rotary disk coupled with a toothed rim of the winch drum, block of time relay consists of time relay (PC) and two accessory relays (PP, PL), of accessory elements and of contacts (Spc, Spp, Spl) connected to coil of electromagnetic valve constituting the executive block of the circuit, however, one of accessory elements of the time relay block is adjustable time element (P), which determines the time of maintenance of switch-on status of drive motor of the winch depending on velocity of combine's movement in the wall.<IMAGE>
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