DE1763472A1 - Control system, especially for longwall equipment in underground mining operations - Google Patents

Description

PATENTANWALT BODE 4033 HÖSEL POST BOX TELEPHONE 02102-61701 -TELEX 8585166

R 1 - 211 II / Bo

GULLICK LIMITED Kirkless Street, Wigan, Lance. » England

Control systems especially for face equipment in underground Mining operations.

The invention relates to a control system that works by moving past an object is operated on individual control devices.

A special embodiment of the invention that is only exemplary is a control system that enables the reverse operation of a face conveyor in underground mining operations is controlled automatically, the advancement of the undisassembled conveyor takes place in sections and as a function is controlled by the respective location of the extraction machine.

It is generally known to cut the conveyor in sections, according to the progress of the mining machine to advance with the help of hydraulic rear devices behind the extraction machine against the mining front, with the extraction machine, for example, on the conveyor can be proceeded. The hydraulic reverse devices can for example be part of a self-advancing expansion element and, if they are double-acting are executed, both for advancing the conveyor »against the

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BATH ORIGINAL PATENTANWALT BODE · 4033 HÖSEL ■ POST BOX · TELEPHONE 02102-61701 ■ TELEX 8585166

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Newly exposed dismantling front as well as moving up the dismantling element serve against the sponsor *

It is also known to be particularly advantageous in sections behind the respective location of the mining machine taking place back process of the face conveyor with the help of control devices to steer »those in passing the extraction machine can be operated by the extraction machine when it drives along the mining front and that The recovered goods are loaded onto the longwall face.

It is an object of the present invention to provide an improved control device of the above type create »the necessity of touch contact between the extraction machine and the control devices avoids, which is very robust and not in consideration of the conditions prevailing in a mine is prone to failure and cannot be operated unintentionally.

The invention relates to a control system which, by moving an object past individual control devices is operated and is characterized by »that on the one hand a number of control devices and, on the other hand, the object magnets are assigned, which when approaching tion to repel each other and thereby actuate the control device when the object moves past.

This arrangement ensures that the control device is only operated when the two are the same and Therefore, mutually repelling magnetic poles are brought closer together. In this way the risk is eliminated that the control device accidentally or accidentally

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PATENT ADVERTISER BODE. 4033 HÖSEL · POST BOX ■ TELEPHONE 02102-61701 · TELEX 8585166

Approximation of an »object that is indeed magnetic but does not magnetize material is triggered. This is for example when using the control system for face scaffolding in underground mining operations, it is important where People who drive on the longwall, iron objects, such as e.g. carry tools with you.

The individual control devices can each have two control valves included, one of which is actuated when the item in one direction, and the other of which is actuated when the object moves past in the opposite direction will. A magnet is assigned to one of the control valves, the north pole of which is in the direction of the one moving past Golgjanstand points, while the other control valve a magnet is assigned, the south pole of which points in the direction of the object moving past. The one on the subject The magnet located in this case is attached in such a way that it is optional its north or south pole in the direction of the magnets the control valves can point, depending on the direction the object is to be moved past the individual control devices. In this way it is possible that one control valve for one direction of movement of the object each control device is operated while at the opposite direction of movement in each case the other control valve of each control device is actuated.

A specific embodiment of the invention is shown below described at the edge of an example that shows the use of the control system according to the invention for automatic control the return process of a face conveyor in a face in the underground Mine operation concerns. In the following

109831/0709

PATENT ADVERTISER BODE. 4033 HÖSEL POST BOX. TELEPHONE 02102-61701 TELEX 858516ε

Reference is made to the drawing in which Fig. 1 is the perspective view of a Sxrebaus-

armor, consisting of extension elements, conveyor and extraction machine,

2 shows a plan view of the entire control system,

Fig. 3 is a plan view and a partial section through one of the same control devices that make up the control system, shows.

The longwall mining with a control system according to the invention is provided, consists of a large number of self-advancing hydraulic expansion elements of known type, which are arranged in a known manner at a distance from one another along the mining front. Some of these expansion elements are shown in FIGS. 1 and 2 and are provided with the reference numerals 10 to 28. The articulated face conveyor C is between the expansion elements and the dismantling front F arranged. The mining machine M moves on the conveyor C and is started this led during the extraction work. The coal obtained at the mining front is used when the machine is moved the conveyor loaded and conveyed away.

After the mining machine has passed through the longwall the conveyor in sections without being dismantled advanced against the newly exposed dismantling front, so that the machine at the end of the Extraction trip in the starting position is ready for a new cut in the opposite direction.

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PATENT ADVERTISER BODE. 4033 HOSEL · POST BOX TELEPHONE 02102-61701 ■ TELEX 8585166

Each expansion element has a hydraulic advance cylinder 29, with the help of which it is advanced in a known manner. The piston rod of the advance cylinder is »as shown at 30, attached to the face conveyor C so that the face conveyor during the advancement of the expansion elements as an abutment can serve.

In the arrangement shown in Fig. 2, the advance cylinder is 29 of every fourth expansion element, namely the expansion elements 10, IH, 18, 22 and 26 designed to be double-acting, so that it is not only suitable for advancing the associated expansion element, but also for advancing in sections of the not dismantled conveyor.

The actuation of these double-acting cylinders is through the passing of the mining machine M via the one shown in FIG. 3 Controlled control device shown. This control device consists of valves 31 and 32, which are normally are open and have valve ports 33, 3U and 3Sa. the Valves are operated with a etrömungsmitte ^ Switching elements provided circuit of a known type connected in the pneumatically operated valves by pneumatic Pulses can be controlled.

The valve openings 3% are outlet openings and can, like will be described later, by closing body 36, which is indicated at 37 are pivotally attached, are locked. The closing bodies 36 are held in the open position by springs 38 »

A magnet 39 is attached to the closing body 36 of the valve 31 in such a way that its north pole N faces the mining front F

shows.

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PATENTANWALT BODE 4033 HÖSEL POST BOX TELEPHONE 02102-61701 TELEX 8585166

A magnet 40 is attached to the closing body 36 of the valve 32. that its south pole S points in the direction of the mining front F.

The openings 33 of the valves 31 and 32 are used to supply compressed air » while each of the openings 34 with a fluid-operated Flip-flop switches 41 and 12 of the fluid-operated Circuit are connected. The flip-flop switches 41 and 42 each have two outputs 43 and 44 and control them Compressed air supply to the compressed air-controlled hydraulic valves 45 (see FIG. 1), which are used for supplying pressure medium to the advancing cylinders 29 are provided.

The valves 31 and 32 are connected to the fluid-operated flip-flop switches ti and 42 via lines 46, while the flip-flop switches with the hydraulic valves 45 Above lines 47 and 48 are connected.

The contactless connection between the extraction machine M and the valves 31 and 32 is made via a magnet 49, which is pivotally attached to the mining machine M at 50. This magnet can be rotated by 180 ° and fixed » so that either its north pole N or its south pole S points to the magnets 39 and 40 of the valves 31 and 32.

It goes without saying that there are flip-flop switches for each control valve 31 and 32 are provided. In Fig. 2 only the flip-flop switches of the expansion elements 10 and 26 are shown.

The system described above works as follows:

Assume that the coal-mining machine is traveling on the conveyor from left to right (see FIG. 2) at the extension element 18

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PATENTANWALT BODE "4033 HOSEL -POST BOX -TELEPHONE 02! 02-6! 7Ol - ^T *« j

past, the magnet 49 being arranged on the mining machine is that its north pole N points in the direction of the valves 32 and 32. When the magnet 49 passes the valve 31, the magnet 39 is pushed back and closes the opening 35 of the valve 31. As a result, a pneumatic Pulse given to the flip-flop switch 11 and the advance cylinder 29 of the expansion element 10 is actuated in order to advance a section of the conveyor C against the dismantling front. In this way, as the mining machine drives past, the eighth expansion element behind the one on which the machine is just passing by, the double-acting rear cylinder for advancing the associated face conveyor section actuated.

It is particularly advantageous that when the magnet 49 moves past the magnet 40, the valve 32 does not is operated because the valves 31 and 32 only react to mutual repulsion of the magnets and in the direction of travel the mining machine from left to right, the north pole of the magnet 49 is opposite the south pole of the magnet 40, so that both attract each other.

Before the direction of travel of the mining machine is changed to the reverse direction of travel for the cut the magnet 49 rotated by 180 ° so that its south pole points in the direction of the magnets 39 and UO of the valves 31 and 32. on In this way, the valve 32 and not the valve 31 is actuated in this direction of travel of the machine. The valves 32 give pulses one after the other to the flip-flop switches 42, so that in turn the advance cylinder of the eighth expansion element is applied behind the machine and advances the associated conveyor section against the mining front.

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PATENT ADVERTISER BODE. 4033 HÖSEL POST BOX. TELEPHONE 02102-61701 ■ TELEX 8585166

The valves 31 and 32 can of course by electrical switches and / or the fluid operated Flip-flop switches can be replaced by appropriate electrical or electronic switching devices that support the Control the actuating valves of the return cylinders, these valves being designed as solenoid valves in this case would have to. In other words, with the exception of magnets 39, HO and 19, the control system is entirely fluid-operated, can be carried out electrically or electronically, or else a combination of electrical or electronic and fluid-operated switching elements.

The system described above, instead of or in addition to the return process of the face conveyor, the advancement of the control individual expansion elements by driving past the extraction machine. For example, if, as shown in Fig. 2, the control device is arranged on every fourth expansion element, the control system can perform the functions of double-acting rear cylinder of every fourth expansion element, i.e. expansion elements 10, l * t, 18, 22, 26 and so on, steer. When each of these expansion elements has largely completed its return process, it can, for example, a Sequence valve control actuated, whereby the following expansion element, for example the expansion element 11, advanced will. This expansion element 11 can, after advancing via a sequence valve control, the reverse operation of the following expansion element initiate, etc., until the three expansion elements, for example the expansion elements 11, 12 and 13, which between the expansion members provided with the control devices 31, 32 are advanced. Bine sequence valve control, which initiates the reverse process of the next expansion element after the back of an expansion element is known from own older registrations.

P atent claims: 10983 1/0709 _{BA0 ommL}

Claims (12)

PATENT ADVERTISER BODE. 4033 HÖSEL -POSTBOX TELEPHONE 02102-61701 TELEX 8585106 Rl- 211 - 9 ■ - Pa te nt.a η s ρ rü eh e: ! .Control system that is activated by moving an object is operated on individual control devices, thereby g e k. e η η indicates that on the one hand a number of control devices (31 to 40) and on the other hand the object CM) magnets (39, 40 and 49) are assigned that mutually approach each other repel and thereby actuate the control device (31 to 40) as the object (M) moves past. 2. Control system according to claim 1, characterized g e indicates that each control device (31 to 40) consists of control valves (31 and 32), which a Control fluid. 3. Control system according to claim 1, characterized in that each control device (31 to 40) consists of electronic or electrical switching elements « 4. Control system according to claim 1 and 2, characterized g β k e η η ζ e i e h η β t that every control valve (31 or 32) with one driven with a flow center ^^ Switching elements provided control circuit is connected. 5. Control system according to claim 4, characterized in that each control valve (31 or 32) with a fluid-operated flip-flop switch (41 or 42) is connected, which is in the fluid-operated Control circuit is arranged. - 10 - ^ - 10.983 1/07 09 BADORIGiNAU PATENT ADVERTISER BODE. 4033 HOSEL POST BOX TELEPHONE 02102-61701 TELEX 8585166 6. Control system according to claim 5, characterized that each control valve (31 biw. 32) has a flow channel (35) to which one An inlet opening (33) at the end and an outlet opening (35a) for the fluid at the other end and which is also connected to a further channel (3U) connected to the fluid-operated Flip-flop switch (Hl or 42) is connected, wherein the outlet opening (3Sa) has a closing body (36) held in the opening division by a spring (38), which is provided with a magnet (39 or UO), which the closing body (36) when the object drives past (M) pushes into its closed position, whereby the fluid entering through the inlet opening (33) • Gives a control pulse to the flip-flop switch (41 or 42). 7. Control system according to one or more of claims 1 to 6, characterized in that each control device (31 to 40) has two control valves (31 and 32), one of the valves (e.g. 31) a magnet. (e.g. 39 is assigned whose north pole (N) is aimed at the passing object (M), while the other valve (e.g. 32) is a magnet (e.g. 40) is assigned, which is directed with its south pole (S) on the object (M) moving past, wherein the magnet (49) is movable on the object (M) moving past, so that either its north pole (N) or its south pole (S) is directed to the magnets (39,40) of the control device (31 to 40) and the control valves (31 or 32) can be operated selectively. 8. Control system according to claim 7, characterized that the magnet (49) is pivotally attached to the object (M). ; =;: -.-, BAD ORIGINAL " ¹¹ " , 109831/0 7 09 PATENTANWALT BODE 4033 HÖSEL POST BOX TELEPHONE 02102-61701 TELEX 8585166 9. Control system according to claim 1 to 9, that of a face armor assigned to underground mining operations that include a mining machine, a face conveyor and Reverse devices for advancing the face conveyor against having the dismantling front, characterized in that the movable object by the extraction machine (M) is formed and that a A plurality of control devices (31 to 40) are arranged at a distance from one another along the face conveyor (C) via the section behind the extraction machine (M) the return process of the Face conveyor (C) is steered against the mining front (F), 10. Control system according to claim 1 to 9, which is assigned to longwall equipment for underground mining operations, the self-advancing expansion elements and an extraction machine for extraction of the mineral as it moves forward the expansion elements, characterized geke nn · characterized in that the movable object through the Extraction machine (M) is formed and that a plurality of control devices (31 to 40) at a distance from one another is arranged along the dismantling front (F), via which the reverse process of the expansion elements (10 to 28) is controlled. 11. Control system according to claim 9, characterized in that the hydraulic advance · Cylinder (29) are part of self-advancing hydraulic expansion elements (10 to 28). 12. Control system according to claim 9, 10 and 11, characterized characterized that the extraction machine (M) is movable on the conveyor (C) or is guided on the same. / (Jf03 'BAD ORIGINAL