DE1252158B - Pit lining with a device for aligning the rear cylinders - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

E21d

German class: 5 c-23/00

Number:
File number:
Registration date:
Display day:

1252158
D 49081VI a / 5 c
5th January 1966
October 19, 1967

The invention relates to a pit lining in which a number of rear cylinders are equipped Extension frame is mounted longitudinally movable on the conveyor by means of coupling elements.

In the case of such a pit lining, a cutting machine or the like is on one along the mining front running conveyor reciprocally mounted. Instead of the sponsor you can also other guides may be provided. When advancing the expansion frame, the conveyor serves as a Anchoring.

During mining, the conveyor often wanders along the mining front, i. E. i.e., it shifts across the mining direction. In a known device, the piston rods are rigid with the Rear cylinders connected to the extension frame are provided with coupling elements at their front ends, which slidably engage a rail attached to the conveyor, causing the Conveyor in particular bending of the rear μ cylinder is to be prevented.

During their advancement, however, the support frames also often move along the work face along and lose their alignment.

The object of the invention is to create a device through which the rear cylinder returns to its correct positions can be returned to the expansion frame.

The object is achieved according to the invention in that the coupling elements are connected to one another and are attached to at least one adjusting device, which allows a displacement of the coupling elements in Can cause direction of the conveyor.

With the help of this arrangement it is achieved in a simple manner that the support frames are aligned Maintain to the dismantling front. In particular, this leads to the expansion frame moving away one end of the dismantling front avoided, whereby the previously required transfer of one to this The extension frame that has migrated to the other end of the dismantling front is omitted. at a remote control of the adjustment devices is therefore a stay of operating personnel on Pit expansion unnecessary.

In an advantageous development, the adjusting device can be a pressure-medium-actuated working cylinder, and one adjusting device can be assigned to a group of expansion frames. Each adjustment device can also be connected to a coupling element of the next following group of extension frames, so that an actuation of this adjustment device also the adjustment pit extension with a device for
Align the rear cylinder

Applicant:

Dowty Mining Equipment Limited,

Ashchurch, Tewkesbury, Gloucester

(Great Britain)

Representative:

Dr.-Ing. H. Negendank, patent attorney,

Hamburg 36, Neuer Wall 41

Named as inventor:

Friedrich Lampl, Battledown, Cheltenham;

Kenneth Law,

Bredon Norton, Tewkesbury, Gloucester

(Great Britain)

Claimed priority:

Great Britain 6 January 1965 (601)

device of the next group adjusted. The conveyor can be an additional one with the coupling elements carry cooperating adjustment device, which has a much larger adjustment range than the other adjusting devices. Furthermore, each adjustment device can be attached to a body running next to the conveyor, which is essentially parallel in a kn to the dismantling front running direction is mounted non-displaceably, and each adjustment device can have a support device by means of which the adjusting device during its actuation is anchored to the conveyor.

With reference to the drawing, the following is an exemplary embodiment of the invention described. In the drawing, the pit lining is only shown schematically.

The pit support shown in the drawing has a conveyor 1 which extends along the working face 2 and which is serpentine and can be advanced in sections. The conveyor 1 serves as a guide for a

709 678/42

Claims (4)

Not shown cutting machine or the like, which can be moved along the mining front, e.g. the coal face. On the side of the conveyor 1 opposite the coal pile 2, extension frames 3 are arranged along the conveyor. Each extension frame has a horizontal rail 4 which carries four pit rams 5 which can be actuated by fluid pressure and which in turn carry a hanging rail (not shown). Each expansion frame 3 is connected to the conveyor 1 by advancing means in the form of a return cylinder 6 actuated by pressure medium. Each rear cylinder 6 has a cylinder 7 which is rotatably arranged on the horizontal rail 4 of the extension frame 3, including a piston rod 8 rotatably mounted on the coupling element 9 is attached and extends over its entire length. The coupling elements 9 are arranged in groups of three pieces each. From left to right in the drawing, the first coupling element 9 of each group is connected to the second coupling element 9 by means of a chain 12, and the second coupling element 9 is fastened to the third coupling element 9 in a similar manner by a chain 12. The third coupling element 9 of each group is rotatably attached to the cylinder 13 of a hydraulically actuated device 14. The piston rod 15 of each adjusting device 14 is connected to the first coupling element 9 of the next group via the chain 12. A hydraulically actuated adjusting device 16 with the cylinder 17 is also arranged on the conveyor 1, the piston rod 18 of which is connected by the chain 12 to the first coupling element 9 of the first group. The stroke of this adjusting device 16 is relatively large in comparison with the stroke of the other adjusting devices 14. When using the above-described pit lining, each part of the conveyor 1 is advanced in the manner of a serpentine line after the cutting machine has passed this section. In practice at least some of the return cylinders 6 are double acting so that they are able to advance the conveyor 1 which is otherwise advanced by other working cylinders (not shown) attached to the extension frame. When the conveyor 1 advances, what is known as "creeping" occurs. "Creep" is understood to mean a slight longitudinal movement of the conveyor, essentially parallel to the excavation front with each advance step. The "creep" occurs in particular when the lying surface falls in a direction running essentially parallel to the mining front 2, e.g. B. in the expansion shown in the drawing from left to right. If the conveyor 1 slides slightly from left to right in the drawing while advancing, the adjusting devices 14 and 16, the coupling elements 9 and the chains 12 are also shifted to the right from the position shown in the drawing, and the return cylinders 6 are inclined to the conveyor, as the expansion frames are unable to follow the sideways movement of the conveyor due to the tension of their stamps between the horizontal and hanging walls. In order to return the return cylinders 6 to their correct position before the expansion frames 3 are advanced, the adjusting device 16 is pressurized with fluid pressure and pulled together by a distance which corresponds to the distance by which the conveyor 1 has slipped, whereby the coupling elements 9 of the first group be moved along the rail 11 of the conveyor 1. As a result, the first adjusting device 14, which is not subjected to pressure during this process, is pulled apart. Thereafter, the adjusting device 16 is hydraulically locked, and the first adjusting device 14 is pulled together by fluid pressure around the sliding path in order to move the coupling elements 9 of the next group along the conveyor 1. The other adjusting devices 14 are operated one after the other in the same way. After that, the extension frames can normally be advanced. ao The relatively long stroke of the adjustment device 16 enables several adjustment processes to be carried out before it has completely contracted. When the adjusting device 16 is fully contracted, its cylinder 17 is released from the conveyor 1 and fastened again at another point. Of course, the cylinder 17 could also be attached to a suitable device which does not slide off with the conveyor 1. In a modified embodiment could ζ. B. the cylinder 13 of all adjustment devices 14 on a body, for example a rope or a chain, attached, the rope or chain next to the rail 11 along the conveyor and anchored to a suitable device that does not slide with the conveyor can be. A sliding of the conveyor then causes a corresponding expansion of all adjustment devices, and the rear cylinders advancing the expansion frames can consequently be realigned by a corresponding subsequent contraction of the adjustment device. The cylinder 13 of all adjustment devices can carry support elements, for. B. rotatably articulated levers that engage the conveyor when the adjustment device in question is actuated, so that.danri the conveyor and not the rope or chain acts as an anchor for the adjustment device. Patent claims: 1. Pit support, in which a number of support frames equipped with rear cylinders by means of Coupling elements is mounted longitudinally movable on the conveyor, characterized in that that the coupling elements (9) are connected to one another and attached to at least one adjusting device (14), which a Moving the coupling elements in the direction of the conveyor (1) can cause. 2. Pit lining according to claim 1, characterized in that the adjusting device (14) is a pressure medium-actuated working cylinder. 3. Pit lining according to claim 1 or 2, characterized in that one adjusting device in each case (14) is assigned to a group of expansion frames. 4. Pit lining according to claim 3, characterized in that each adjusting device (14) also with a coupling element of the next