Alternating the turnover of the drum from the front hand for the reverse, the traffic lines are movement in one direction or the other. The disadvantages of this method are the need to overturn the head and tail ropes, the large length of the rope (equal to the triple length of the rolling track), as well as limited productivity due to movement along one path.
Rolling into three end ropes (head, tail and connecting) along the two paths of one two -drum winch. Larged trolleys move along one path, and at the same time in another way – empty, in the opposite direction; Both compounds are connected by the third connecting rope enveloping the end pulley. In this case, each path serves alternately for the movement of loaded and empty composition. The disadvantage of this type of pumping is the need to re -take ropes, however, the performance of such a two -way pumping twice as much as the previous.
Rolling out an endless rope along two ways with one winch with a leading pulley; carried out by one closed rope stretched between two end stations. Group trolleys moving in one direction are attached to one branch of the traction rope, and empty trolleys moving in the opposite direction are attached to the other. The advantage of this type of pumping is continuity in the supply of goods, greater performance than in other road schemes.
The following schemes are used on rollbacks and lifts.
Rolling away one end rope along one path with one single -drum winch. Loaded trolleys are stretched out with a rope in only one direction – in the rise, and in the opposite direction they move through a scooter along the rail track laid down with a fairly large bias.
Rolling away with two end ropes along two paths of one two -shirt winch. Larged trolleys move along one path, and at the same time in another way in the opposite direction, a scooter – empty trolleys.
