SU1728114A1 - Inclined hoist - Google Patents

Description

The device works as follows.

At the edge of the pit or near the mouth of an inclined shaft, a support 16 is installed for pile driving deflecting pulleys 4. In the ground version (taking into account the deviation angles of the ropes), a drum-type machine is placed with a screw thread of the streams under one or. several head ropes 2, wound on the side with a calculated number of moving turns of friction. The trunk track 8 for vessels 5 and 7 is mounted along the trunk slope or pit slope to its lower horizon. The branches of the head ropes are connected to vessels 5 and 7 through scraper pulleys. Tail rope 12 through the additional deflecting pulley 13 makes the rope-vessel system closed. When the drum 1 is rotated, the friction turns move along a helical surface from one flange to another, while the empty vessel accordingly goes down and the loaded vessel rises up.

The lifting cycle is completed by unloading one vessel in the upper position and loading another in the lower horizon of the quarry, respectively, at the place of 11 unloading and 10 loading. In the process of moving the loaded skip up empty under the action of its own weight and forcibly tails down to the bottom. After the vessel unloading and loading phase, the cycle is repeated. In the event of a safety braking, a loaded or empty vessel rushing onto the rope does not occur, since an additional diverting pulley ensures synchronous movement of the branches of the ropes,

Each head rope covers the drum with a constant number of friction turns defined by the expression:

 m

0.16

1 + 0o +

In

"1 Ki to

1 +

"2K.2 K

+ 0.5

where m is the safety factor for non-slip rope;

fi is the coefficient of friction between the rope and the drum;

Ki, K2 - the number of head and tail ropes respectively;

“O is the ratio of the mass of the cargo to the mass of the vessel;

a, (Xi is the mass ratio of the head and tail ropes, respectively, to the mass of the vessel;

k- AC parameter sl.nTa + fcos ct,

where a is the angle of conductors to the horizon;

5f - coefficient of friction between the vessel

and conductor.

Claims (3)

1. Inclined lifting installation, comprising a flexible connection covering the scraper deflecting pulleys and a driving drum with spiral grooves, at the ends of which lifting vessels are suspended, in order to increase reliability and performance, it is equipped with an additional deflecting pulley axis which is located in the trunk in the plane of the route of the vessels, and around its tail cable, the ends of which are connected to the vessels, and the number of turns of the flexible coupling friction, covering the driving drum, with the expression:  m 0.16 / gK1 1 + OQ + In ctiKi to 1 + 02 K2 + 0.5, five 0 five 0 five where m is the safety factor for non-slip rope; fi is the coefficient of friction between the rope and the drum: Kt.Ka - the number, respectively, of the head and tail ropes; “O is the ratio of the mass of the cargo to the mass of the vessel; . czi, oa is the mass ratio of the head and tail ropes, respectively, to the mass of the vessel; k is the parameter k - + fcos.V, where a is the angle of inclination of the conductors to the horizon; f is the coefficient of friction between the vessel and the conductor. 2. The apparatus according to claim 1, characterized in that the axial lines of the deflecting and scraper pulleys are made crossing and orthogonal, while the scraper pulleys are placed coaxially. 3. Installation according to claims 1 and 2, characterized in that the diameter of the additional deflecting pulley is equal to the distance between the longitudinal geometrical axes of both vessels. Fig. /  /five