DE9217657U1 - Height-adjustable shielding wall on the conveyor of a shearing machine extraction system for underground mining - Google Patents

Description

PATENT ATTORNEYS

DIPL.-ING. BUSCHHOFF DIPL.-ING. HENNICKE DIPL.-ING. VOLLBACH

D-5000 COLOGNE 1
KAISER-WILHELM-RING 24

FILE:

REGISTRATION NUMBER.

Gw9242

COLOGNE, 23.12.1991 vo/hd

PLEASE SPECIFY

Note: Westfalia Becorit Industrietechnik GmbH, Industriestr. 1, 4670 Lünen

Title: "Height-adjustable shielding wall on the conveyor of a cutting machine extraction system for underground mining"

The invention relates to a height-adjustable shielding wall on the conveyor of a cutting machine extraction system for underground mining, with upstanding side plates attached to the individual trough sections of the conveyor on the offset side and with sliding brackets guided thereon with sliding guides, which can be raised by means of hydraulic sliding cylinders, which overlap at their ends and are coupled in their plate plane so as to be pivotable against each other in the direction of entry and exit.

Height-adjustable shielding walls of this type are primarily intended for shielding the driving area in underground mining operations with inclined or steep storage in order to shield the driving area from falling stones and coal in relation to the conveyor and mining area. The shielding wall is installed on the offset side of the conveyor so that it can be moved with it. The height-adjustable shielding wall enables it to be adapted to changing seam thicknesses.

In a known height-adjustable shielding wall of the aforementioned type according to DE-PS 31 45 367, the side plates connected to the conveyor on the offset side and the sliding brackets leading to them are designed in such a way that their ends overlap like roof shingles to seal the joints. For this purpose, the side plates must be bent in a roughly Z-shape and designed with a bent angle running in their lengthwise direction, which requires a not inconsiderable manufacturing process.

effort means.

The non-pre-published DE patent application P 42 07 227.1 discloses a height-adjustable shielding wall in which the sliding brackets, which overlap at their ends, have at one end a guide tongue with a guide slot that spans the joint of the side panels and at the other end an extension with guide pins that spans the other side panel joint, whereby the adjacent sliding brackets are pivotably coupled to one another via the guide pins that engage with the guide slots. The sliding brackets form a continuous articulated bracket chain that follows the conveyor path over the length of the conveyor, in which only a single sliding cylinder is required on each of the sliding brackets due to the connections of the sliding brackets consisting of guide pins and guide slots.

In mining operations with cutting machine extraction, it is necessary to provide a cutting cable (cutting hawser) for the cutting machine, which runs with its machine body above the conveyor - generally a roller cutting machine - which is laid in a cable duct arranged on the offset side of the conveyor and extending over the length of the conveyor. The cutting cable is dragged along by the cutting machine during the extraction run and laid back into the cable duct behind it.

The object of the invention is to create a height-adjustable shielding wall with an associated cable duct for the cutting cable for use in a shearing machine extraction system, whereby the cable duct is designed in such a way that it can easily adapt to the course of the shielding wall, which can be extended to different extents on parts of the conveyor.

This object is achieved according to the invention in that the height-adjustable sliding brackets have a

A cable duct designed like a link chain is arranged along the course of the conveyor to accommodate the cutting cable of the cutting machine running above the conveyor. The cable duct is preferably arranged on the offset side behind the sliding brackets.

According to the invention, the cable duct for storing the cutting cable of the cutting machine is attached to the height-adjustable sliding brackets of the shielding wall and is designed in such a way that it can easily follow the respective course of the sliding brackets, which may be raised to different heights. This is achieved by the cable duct being designed in the manner of an articulated chain that follows the course of the sliding brackets and can freely adapt to the retraction and extension movements of the sliding brackets.

The cable duct can be designed in the form of an articulated chain in different ways. Preferably, the arrangement is such that the individual segments of the cable duct connected to the sliding brackets overlap with their ends in the overlapping area of the sliding brackets and are pivotably coupled to one another via pin-slot guides in the plane perpendicular to the bank. In this preferred design, each sliding bracket is assigned an individual segment of the cable duct. The coupling of the individual segments of the cable duct via the pin-slot guides enables the adjustment movements of the individual segments to the course of the bracket wall formed by the sliding brackets that are extended to a greater or lesser extent, whereby the individual segments of the cable duct are simultaneously connected to one another to form the articulated chain via the pins that engage in the slot guides, while maintaining their freedom of movement. The arrangement is expediently made such that the individual segments of the cable duct have at one end a plate-shaped guide tongue with a guide slot extending in the longitudinal direction of the individual segment and at the other end a plate extension with a guide pin, whereby

in the overlapping areas of the adjacent individual segments, the guide pin of one individual segment is in coupling engagement with the guide slot of the adjacent individual segment. The guide tongue and the plate extension of the individual segments are expediently formed by a mounting plate that delimits the cable duct on its inner side, with which the individual segments are connected to the sliding bracket.

In a further advantageous embodiment of the invention, the guide pins are arranged on the plate extensions of the individual segments of the cable duct, projecting towards the side facing away from the sliding brackets. The wall elements that delimit the upwardly open cable duct on the outside are connected to the mounting plate of the individual segments, with the guide tongue and the plate extension at the ends of the individual segments projecting beyond these outer wall elements. The wall element on the individual segments is preferably formed by several approximately L-shaped wall parts arranged at a distance from one another. This results in a reduction in the weight of the individual segments of the cable duct. At the same time, dirt accumulation in the cable duct is avoided.

It is also recommended that the individual segments of the cable duct be detachably connected to the sliding brackets and their attachments, e.g. by screwing, using plug connections, bolt-slot connections or similar. The individual segments of the cable duct are conveniently connected to the head of the sliding brackets. The arrangement is advantageously made in such a way that connection plates are connected to the head of the sliding brackets, with which the individual segments of the cable duct are connected, preferably detachably. The connection plates on the offset side of the sliding brackets are conveniently supported against the sliding brackets on the back via intermediate webs or similar.

For the shielding wall equipped with the cable duct according to the invention, one of the designs according to DE patent application P 42 07 227.1 is preferably used. Here, the sliding brackets, which overlap at their ends, have at one end a guide tongue with a guide slot that spans the joint of the side panels and at their other end an extension with guide pins that spans the other side panel joint, whereby the adjacent sliding brackets are pivotably coupled to one another via the guide pins that engage with the guide slot. The coupling of the sliding brackets via pins and guide slots corresponds to the coupling of the individual segments of the cable duct in its preferred design. The side plates, which are firmly attached to the conveyor trough sections on the offset side and protrude above the trough sections, have a guide fitting on the back that forms the sliding guide for the sliding brackets, while the sliding brackets are each provided with a guide tongue or similar on the back that runs in the sliding guide and is connected to the sliding bracket at its upper end in a hinged manner parallel to the plane of the sliding bracket. In the retracted position, the sliding brackets and thus also the guide segments of the cable duct arranged on them are located on the offset side behind the side plates. The guide fittings are also arranged eccentrically on the side plates, with the sliding cylinder being connected near the sliding guide.

Further design features of the invention are specified in the individual claims and emerge from the following description of the embodiment shown in the drawing. The drawing shows:

Fig. 1 in cross section through a mining face in schematic simplified a shearing machine extraction system with the height-adjustable screen wall according to the invention and attached cable

channel for the cutting cable, with the sliding bracket extended towards the hanging end in relation to the associated side plate;

Fig. 2 in a view from the offset side, i.e. in the direction of arrow II of Fig. 1, the shielding wall according to the invention on a partial length of the conveyor, which here comprises the length of three trough sections, the cable duct being omitted for reasons of clarity;

Fig. 3 is a vertical section along line III-III of Fig. 2, but with the cable duct or the individual segment thereof connected to the sliding bracket ;

Fig. 4 shows a section through the shielding wall along line IV-IV of Fig. 2, but with a single segment of the cable duct attached to the sliding bracket on the offset side;

Fig. 5 two consecutive and interconnected individual segments of the cable duct according to the invention, detached from the shielding wall in a view from the offset side (in the direction of arrow II in Fig. 1);

Fig. 6 is a vertical section along line VI-VI of Fig.

Fig. 1 shows a simplified schematic of an extraction face with the cutting machine extraction system arranged therein. This consists in a known manner of a conveyor 2 resting on the footwall 1 and a cutting machine 3 running with its machine body above the conveyor, which is designed in the usual way as a cutting machine whose driven cutting rollers 4 mine the coal seam 5.

The conveyor 2 consists, as usual, of a chain scraper conveyor that can be moved in sections, the trough sections of which forming the conveyor trough are connected in such a way that they can be slightly angled against one another. A guide rail 6 is attached to the side profile of the trough sections of the conveyor 2 on the face side, which forms a guideway for the cutting machine, which is supported by rollers on the guide rail 6. On the offset side, the trough sections of the conveyor 2 have drive rod holders 8 attached to them, which carry a drive rod 9 on which the cutting machine 3 is guided with a support foot 10. The cutting machine is advanced in the longitudinal direction of the conveyor in a known manner by at least one driven drive rod wheel arranged on the cutting machine and engaging with the drive rod 9.

Cutting machine extraction systems of this or similar design are known and therefore do not require any further explanation. The design of the shielding wall 11 attached to the conveyor 2 on the offset side with the cable duct 12 arranged on it is essential, which accommodates a cutting cable 13 that is connected to an arm 14 of the cutting machine 3 that spans the shielding wall 11 and is dragged along by the cutting machine during the extraction run and is deposited behind the cutting machine in the cable duct 12. Such arrangements are also known and therefore do not require any further explanation.

As shown in particular in Fig. 2 to 4, side plates 16 are attached to the individual trough sections 15 of the conveyor 2 on the offset side, which protrude far above the trough sections and form fixed wall elements of the shielding wall 11. In the embodiment shown, the side plates 16 are connected with their base on the offset side behind the drive rod 9 to the drive rod holders 8 of the trough sections. The length of the side plates 16 corresponds approximately to the length of the trough sections 15.

The joint areas between the individual side plates 16, i.e. the joints 17 (Fig. 2) between the adjacent

Side plates 16 are closed by gap covers (not shown) of a known type, e.g. by cover plates or other cover elements suspended between the adjacent side plates. Each side plate is assigned a sliding bracket 18 which, as shown in particular in Figs. 2 and 4, is located behind the associated side plate 16 on the offset side and can be extended upwards relative to the side plate 16 in order to be able to adjust the height of the shielding wall to suit the operational conditions, in particular the seam thickness. A guide fitting 19 is attached to the offset side of each side plate 4, preferably screwed on, which forms a vertical or right-hand sliding guide 20 for a guide tongue 21, which is connected at the end protruding from the top of the sliding guide in a joint 22 with a horizontal joint bolt at the back of the upper head end 23 of the sliding bracket 18, which is thus pivotable in relation to the guide tongue 21 guided in the sliding guide 20 in the direction of insertion and extension in the right-hand plane, i.e. in its plate plane. The guide tongue consists of a comparatively narrow but strong flat bar or plate cut, while the sliding guide 20 consists of a guide pocket that encompasses the guide tongue 21.

As shown in Fig. 2, the guide fitting 19 is arranged off-center on each side plate 16. Each sliding bracket 18 is assigned a hydraulic sliding cylinder 24, which is located at a relatively close lateral distance from the sliding guide 9 near the end of the side plate 16. The sliding cylinder 24 is connected in the area of its lower cylinder end in a joint 25, which is preferably designed as a universal joint, to the side plate or laterally to its guide fitting 19. It is connected with its piston rod in the joint 26 at the head end 23 of the sliding bracket 18. With the help of the sliding cylinders 24, the individual sliding brackets 18 can therefore be raised or lowered relative to the fixed side plates 16 of the shielding wall 11.

The guide fitting 19 on each side plate 16 is designed so that the sliding guide 20 is at a distance from the offset side of the side plate 16, so that the sliding bracket 18 can enter the space 27 between the sliding guide 20 and the side plate 16.

The sliding brackets 18, which consist of reinforced metal sheets, each have a length that is greater than the length of their side plate 16 or the associated channel section 15. The sliding brackets 18 therefore overlap the joints 17 of the channel sections and the side plates with both ends, with one end of the sliding bracket 16 being designed as a guide tongue 28 that is offset in height from its middle area and is provided with a guide slot 29 that runs towards its free end and runs in the longitudinal direction of the sliding bracket. At its opposite end, each sliding bracket 18 has a plate extension 30 that overlaps the joint 17 located here and carries a guide pin 31 that is directed perpendicularly to the plane of the sliding bracket. As shown in Fig. 2, the sliding brackets 18 are arranged on the side plates 16 of the channel sections in such a way that they overlap with their guide tongues 28 and plate extensions 30, whereby the guide pin 31 of the respective plate extension 30 engages in the guide slot 29 of the respective guide tongue 28, whereby the sliding brackets can pivot against each other in their plate plane.

Fig. 2 shows that the individual sliding brackets 18 can be extended and lowered independently of one another using their sliding cylinders 24 and, due to the end-side overlaps of their guide tongues 28 and plate extensions 30, form a bracket wall that runs the length of the conveyor 2 and keeps the gaps 17 on the abutting surfaces closed at all times. Since the sliding brackets 18 are also coupled at the overlapping ends via the pin-slot guides 29, 31 and are also pivotably connected to the guide tongues 21 in the joints 22, when the conveyor is raised

Each sliding bracket 18 carries the two adjacent sliding brackets coupled to it with their ends that are located away from the sliding guide. In Fig. 2, the sliding bracket 18 shown on the right in the picture is fully extended with the help of its sliding cylinder 24, while the sliding bracket shown on the left in the picture is fully lowered, i.e. lies completely behind its side plate 16. When the sliding cylinder 24 is retracted, the middle sliding bracket 18 is in a strongly inclined position between the outer sliding brackets 18 coupled to it. The sliding brackets 18 coupled to form a bracket chain can therefore be extended individually or in groups both evenly and to different extents with the help of the sliding cylinders 24, whereby the joint areas always remain closed due to the end overlaps of the sliding brackets.

The upwardly open and approximately trough-shaped cable duct 18, which accommodates the cutting cable, is arranged on the offset side behind the sliding brackets 18. It is designed in the manner of an articulated chain that runs through the overlapping areas of the sliding brackets 18. Each sliding bracket 18 is assigned an individual segment 32 of the cable duct 18. Fig. 5 shows two coupled individual segments 32 of the cable duct, which are assigned to two adjacent sliding brackets 18 of the shielding wall 11. Each individual segment 32 consists of a sheet metal forming a mounting plate 32, which forms the side wall of the approximately U-shaped cable duct on the side of the sliding bracket 18, and of a wall element forming the bottom and the offset side wall of the cable duct, which in the embodiment shown is formed by several approximately L-shaped wall parts 34 arranged at a distance from one another, which are connected at their upper ends by a connecting pipe 35 or the like. The mounting plate 33 has a length which corresponds approximately to the length of the sliding brackets, including their guide tongue and their plate extension. Accordingly, the mounting plate 33 forms a plate-shaped

Guide tongue 36, which is bevelled towards its end and has a long guide slot 37, which ends at the free end of the guide tongue 36 at 38. The other end of the mounting plate 33 forms a plate extension 39, which is also offset in height compared to the middle area of the individual segment 32 and carries a fixed guide pin 40 pointing towards the offset.

As shown in Fig. 1 to 4, connection plates 41 are attached to the head 23 of the sliding brackets 18 at a distance behind them, which have the approximately Z-shaped outline shown in Fig. 2 and to which the individual segments 32 of the cable duct 12 are connected with their mounting plates 33 in connections 42, e.g. by screwing. The connection plates 41 are supported at the back against the back of their sliding bracket 18 via fixed intermediate webs 43, as shown in Fig. 2 and 4.

As Fig. 5 shows, the individual segments 32 of the cable duct 12 are connected on the offset side to the sliding brackets 18 or to their connecting plates 41 in such a way that they overlap with their guide tongues 36 and plate extensions 39, whereby the guide pin 40 slides into the guide slot 37 at each overlap point, so that the individual segments 32 thus coupled can be pivoted about the axes of the guide pins 40 in a plane parallel to the sliding bracket plane and can also be moved against one another in the direction of the guide slots 37. The coupling of the individual segments 32 of the cable duct 12 therefore basically corresponds to the coupling of the sliding brackets 18 via their pin-slot guides described above. The individual segments of the cable channel 12 coupled in this way also form a continuous articulated chain in the longitudinal direction of the conveyor 2 or the shielding wall 11, which follows the respective course of the sliding bracket wall. The sliding brackets 18 can therefore be moved in and out individually or in groups as desired and also differently, with the cable channel 12 formed by the coupled individual segments 32 following the respective course of the sliding

bracket wall can follow freely. The height of the cable duct 12 can be adjusted with the sliding brackets 18 relative to the conveyor 2 and the side plates 16. The arm 14 (Fig. 1) of the cutting machine 3 lies with its end serving to connect the cutting cable 13 in or, depending on the height of the sliding brackets, above the openings of the cable duct 12.

The pin-slot guides 37,40 of the individual segments 32 of the cable duct 12 also enable the coupled individual segments to be bent towards each other in the direction of the excavation face by angles of approximately 1.5 - 2°. The same applies to the sliding brackets coupled via the pin-slot guides 31, 29. The shielding wall and the attached cable duct can therefore adapt to the respective course of the conveying.

Claims (19)

Expectations: 1. Height-adjustable shielding wall on the conveyor of a cutting machine extraction system for underground mining, with upstanding side plates attached to the individual trough sections of the conveyor on the offset side and sliding brackets guided thereon with sliding guides, which can be raised by means of hydraulic sliding cylinders, which overlap at their ends and are coupled in their plate plane so as to be pivotable against each other in the direction of retraction and extension, characterized in that a cable duct (12) designed in the manner of an articulated chain is arranged on the height-adjustable sliding brackets (18) for receiving the cutting cable (13) of the cutting machine (3) running above the conveyor (2). 2. Shielding wall according to claim 1, characterized in that the cable duct (12) is arranged on the offset side behind the sliding brackets (18). 3. Shielding wall according to claim 1 or 2, characterized in that individual segments (32) of the cable duct (12) connected to the sliding brackets (18) overlap with their ends in the overlapping area of the sliding brackets (18) and are pivotally coupled to one another in the plane perpendicular to the bank via pin-slot guides (37, 40). 4. Shielding wall according to claim 3, characterized in that the individual segments (32) of the cable duct (12) have at one end a plate-shaped guide tongue (36) with a guide slot (37) extending in the longitudinal direction of the individual segment and at the other end a plate extension (39) with a guide pin (40), wherein in the overlapping areas chen of the adjacent individual segments (32), the guide pin (40) of one individual segment (32) is in coupling engagement with the guide slot (37) of the adjacent individual segment (32). 5. Shielding wall according to claim 4, characterized in that the guide tongue (36) and the plate extension (39) of the individual segments (32) are formed by a mounting plate (33) which delimits the cable duct (12) on its inner side and with which the individual segments (32) are connected to the sliding bracket (18). 6. Shielding wall according to claim 4 or 5, characterized in that the guide pins (14) are arranged on the plate extensions (39) of the individual segments (32) so as to project towards the side facing away from the sliding brackets (18). 7. Shielding wall according to claim 5 or 6, characterized in that wall elements (34) which delimit the upwardly open cable duct (12) on the outside are connected to the mounting plate (33) of the individual segments (32), the guide tongue (36) and the plate extension (39) projecting beyond the wall elements (34) at the ends of the individual segments (32). 8. Shielding wall according to claim 7, characterized in that the wall element (34) of the individual segment (32) is formed by several approximately L-shaped wall parts arranged at a distance from one another. 9. Shielding wall according to one of claims 3 to 8, characterized in that the individual segments (32) of the cable duct (12) are detachably connected to the sliding bracket (18) or attachments thereof, e.g. by screwing (42). -&Igr;&dgr;-&Igr;&Ogr;. Shielding wall according to one of claims 3 to 9, characterized in that the individual segments (32) of the cable duct (12) are connected to the head (23) of the sliding brackets (18). 11. Shielding wall according to one of claims 3 to 9, characterized in that connecting plates (41) are connected to the head (23) of the sliding brackets (18), to which the individual segments (32) of the cable duct (12) are connected, preferably detachably, 12. Shielding wall according to claim 11, characterized in that the connecting plates (41) are supported on the rear side against the sliding brackets (18) via intermediate webs (43). 13. Shielding wall according to one of claims 5 to 12, characterized in that the mounting plates (33) of the individual segments (32) are offset in height in the length region of their guide tongues (36) and the plate extensions (39) compared to their central region. 14. Shielding wall according to one of claims 1 to 13, characterized in that the sliding brackets (18) overlapping at their ends have at their one end a guide tongue (28) with a guide slot (29) and at their other end an extension (30) with guide pins (31), wherein the adjacent sliding brackets (18) are pivotably coupled to one another via the guide pins (31) engaging with the guide slots (29). 15. Screening wall according to one of claims 1 to 14, characterized in that the side plates (16) each have a sliding guide (20) forming guide fitting (19), and the sliding brackets (18) each have a sliding guide tongue (21) leading to the guide, the guide tongues (21) being connected at their upper ends to the sliding brackets in a plane parallel to the plane of the sliding brackets (18) in an articulated manner. 16. Shielding wall according to one of claims 1 to 15, characterized in that the sliding brackets (18) are located on the offset side behind the side plates (16) in the retracted position. 17. Shielding wall according to claim 15 or 16, characterized in that the guide fittings (19) are arranged eccentrically on the side plates (16), and that on each side plate (16) the sliding cylinder (24) is arranged in the vicinity of the abutting end of the side plate. 18. Shielding wall according to one of claims 15 to 17, characterized in that an upwardly open receiving pocket (27) for the lowered sliding bracket (18) is arranged between the sliding guide (20) and the guide fitting (19) arranged on the side plate. 19. Shielding wall according to one of claims 1 to 18, characterized in that the side plates (16) are fastened in their foot area on the offset side behind a rack and pinion (9) to rack and pinion holders (8) or the like.