DE1058454B - Method and device for unloading debris when sinking a shaft - Google Patents

Description

GERMAN

When sinking mine shafts, the general procedure is to remove what has been shot Using a gripper, rock is brought into a recovery bucket, in which it is transported upwards. One has So far we have looked in vain for a way to remove this time-consuming reloading of the rock from the grab in to avoid the recovery bucket. These attempts failed because one had to take into account the space available could only use grippers in the shaft, the capacity of which was considerably smaller is like that of a mountain bucket. Transporting buckets ■ has therefore always been more economical than direct conveyance by means of a gripper.

A change in this regard can only be achieved if it is possible to use a gripper the width of which corresponds approximately to that of the shaft at the work site, because then for the gripper to achieve a "load capacity" that at least comes close to that of the mountain bucket. This endeavor but the fact that the shaft extensions above the place of work prevent the - draining make an open gripper of such dimensions impossible.

The method forming the subject of the invention provides a remedy here. This uses one Gripper with placement control and bell emptying, which only fully opens after reaching the bottom of the shaft will. The gripper to be emptied is brought into engagement with it above the gripper head Put on support means that can be displaced on cross struts of the shaft extension. After that, the Gripper partially open, d. H. only so far that those preventing his return to the closed position Means cannot yet come into effect, whereupon after the goods have been handed over to one of the Gripper path extendable or swiveling intermediate conveyor of the gripper by pulling in the hoist rope closed, released from the support means and after moving the intermediate conveyor from the Gripper path is drained in order to receive a new filling after reaching the bottom of the shaft to be reopened - this time completely - where the shaft cross-section through internals is not yet narrowed.

In order to keep the time for a work cycle as short as possible, the invention also proposes with increasing Lower the intermediate conveyor and, if necessary, the winch in each of the work locations to arrange the closest sole.

Another feature of the invention is the metal sheets of the gripper shells to the To connect the gripper axis facing away from the sides of the gripper arms. In this way the gripper succeeds a noticeably larger capacity to give process and facility

for unloading debris

when sinking the shaft

Applicant:

Demag gripper factory. GmbH.,
Duisburg-Hamborn

Johann Dentgen, Duisburg-Meiderich,
has been named as the inventor

- than it has a gripper of the same size, in which the Shell walls are attached to the inside of the gripper arms in the usual way.

Fig. 1 shows a schematic, partially sectioned side view of a. Gripper to exercise the method according to the invention,

Fig. 2 shows, on a reduced scale, the arrangement and mode of operation of the grab when sinking the shaft. -.

On the gripper head 1 are in a known manner

- Articulated push rods 2 which engage the blades or arms 3. The latter are rotatably attached to the shell cross-member Λ. The hoist rope 5 is with

- Provided a ■ piece of chain 6, to which another piece of rope 7 is connected. The rope can be guided over a series of rollers 8 and 9 like a fiaschenzug and is wound on the winding drum 10, in the interior of which there is a spiral spring. In the gripper head sit pawls 11, which can engage in the chain piece 6, but are prevented in certain operating positions from this engagement by the sleeve 12 provided with slots 13, which has a collar 12 α at its upper end.

If the gripper frame is caught, the shell cross-member 4, the gripper blades or arms are raised are gradually closing. During the movement, an approach 14 hits against the lower end of the Slotted sleeve 12 on the gripper head and lifts it so that the pawls 11 can pass through the slots 13 of the sleeve 12. The gripper is immediately after Close lifted without interrupting the hauling in of the rope. The gripper can then with his Contents are brought to the emptying point. Here cross struts 20 are provided in the shaft extension,

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Claims (4)

between which the gripper with its sleeve 12 is passed. If the support means 21 stored on the cross braces 21 are brought under the collar 12 a of the sleeve 12 and the rope slackened, then this sits on the support means, so that when the rope slackens further, the gripper is opened and moves around the point 22 pivotable chute 23 emptied into the carriage 24. Special measures ensure that the pawls 11 cannot take effect during emptying. This can be achieved, for example, by not opening the gripper completely. This is generally ensured by the expansion of the shaft at the emptying point where the gripper shells hit prematurely. After emptying the gripper is closed again by pulling in the rope and raised so far that the support means 21 can be removed. Now, after the chute 23 has been pivoted out of the range of motion of the gripper, the gripper can be lowered. When the gripper is seated, the lowering movement of the rope is initially continued, the lower end of the rope 7 being wound onto the drum 10, since the drum is rotated by the internal spiral spring until the chain piece 6 comes into the area of action of the pawl 11. If the rope is now retrieved again, the pawls 11 engage in the chain piece 6 and thus couple the gripper head 1 with the chain and thus also with the rope 5. When this rope is further retrieved, the gripper head rises. The shell traverse 4 does not take part in this movement, however, since the lower piece of rope 7 is now left out of the drum 10 because the spring in the winding drum cannot overcome the weight effect of the shell traverse and the gripper arms. As a result, the gripper opens. The opened gripper is now placed on the rock again and then closed in the manner mentioned at the beginning. The game now repeats itself again. Instead of the manually moving support means 21, an automatically acting device can be provided which is effective when the collar 12a passes through and is rendered out of action when the gripper is lifted after emptying by control means provided on it. The method according to the invention has the further considerable advantage that significantly fewer workers are required at the loading point of the gripper than was previously necessary for transferring the rock from the gripper into the recovery bucket. Patent claims: 1. Method for removing debris when sinking the shaft by means of a touch-down control and bell emptying of operating multi-shell grab, characterized in that the gripper to be emptied on to be brought into engagement with it above the gripper head (1), displaceable support means (21) are placed on transverse struts (20) of the shaft extension and is only partially opened by slacking off the hoist rope (5), whereupon after delivery of the goods in an intermediate conveyor (23) of the grippers that can be extended or swiveled out of the gripper path closed by pulling in the hoist rope, released from the support means (21) and only after Reaching the bottom of the shaft is fully opened to take up the pile again. 2. The method according to claim 1, characterized in that the receiving means as the depth increases for the conveyed goods delivered by the gripper and possibly also the gripper winch be arranged in the next higher level of the work place. 3. Device for performing the method according to claims 1 and 2, characterized by a gripper, the width of which in the open state is approximately that of the shaft at the work site is equivalent to. 4. Device for performing the method according to claims 1 and 2, characterized in that that the metal sheets of the gripper shells are connected to the sides of the gripper arms facing away from the gripper axis. Considered publications:
German patent specification No. 818 410. 1 sheet of drawings