DE1221175B - Wandering longwall mining - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

E21d

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

German class: 5c-10 / Ol

Number: 1221175

File number: D 42654 VI a / 5 c

Filing date: October 7 , 1963

Opening day: July 21, 1966

The invention relates to a traveling longwall mining for underground operations, in which each individual a plurality of expansion frames with one extending in particular along the joint, as Anchoring used face conveyor via a single-acting frame rear cylinder and some of these Extension frame additionally with this face conveyor via a double-acting anchoring rear cylinder are in operative connection.

The invention has set itself the task of a migratory longwall construction in a simple way To create signaling device that inevitably has a few and practically non-failure-prone means Gives a warning signal in front of the back of the face conveyor. The solution to this problem is all the more urgent, as such wandering longwall structures are operated on a large scale via remote controls, so that the person who turns on the back of the face conveyor is proportionate to the face conveyor can be far away. ao

According to the invention, the object is achieved in that the anchoring rear cylinder hinged on the extension frame is enclosed by a known sleeve acting on the face conveyor, the anchoring rear cylinder and the sleeve can also be mounted in reverse, and that between the end face of the the cylinder 26-27 protruding piston rod of the anchoring return cylinder and the sleeve bottom cooperating with it for the purpose of backing the face conveyor, a free stroke is provided, along which the piston rod acts on a signal or warning device attached to the sleeve.

If now the piston of the anchoring rear cylinder for the purpose of the back of the face conveyor is acted upon, although the piston rod moves forward; but before they come to the case bottom comes into engagement and accordingly able to move the face conveyor forward, the piston rod must Overcome the free lift and operate the signal or warning device while doing so. The service team is done in this way automatically and with very simple, practically no downtime exposed agents warned that the face conveyor will be advanced shortly.

To prepare the back of the extension frame, the anchoring rear cylinder is first reversed applied. Here, too, the piston rod of this anchoring rear cylinder first actuates the Signaling or warning device, so that the operating team is now made aware of it is that within a short time another motion-wandering longwall construction

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:

Douglas Herbert Hewlett Bolton,
Winchcombe, Cheltenham, Gloucester;
Michael Charles Potts, Prestbury, Cheltenham,
Gloucester (UK)

Claimed priority:

Great Britain 10 October 1962 (38 394)

Process, namely the advancement of the extension frames belonging to this group, takes place.

The arrangement of signaling or warning devices in connection with pit punches is known. It is also known to use the piston rod of the piston of a return cylinder for the purpose of their To arrange protection in a rear cylinder. The sleeve that, according to the invention, the anchoring rear cylinder encloses, but in the invention is closely related to the free lift, the between the end face of the piston rod and the bottom of the sleeve is provided and now again the Possibility of arranging a positively actuated and extremely robustly executed signal and Provides warning device which is necessarily actuated before the back of the face conveyor starts. In this way it becomes progressive and not obvious from knowing what is known Combination effect created.

The warning device is preferably arranged on the sleeve and has an actuation device

609 590/49

3 4

jump, which is exerted on the expansion frame 4 in the path of movement of the rear-rear cylinder 9

Cylinder piston rod lies and on which the return will be.

Cylinder piston rod engages with a stop. At one end of the coal face 2 is one

An embodiment of the invention is now _sr - pressure generation system 14 for generating

more described with reference to the figure, arranged in the 5 hydraulic pressure, and it extends

is shown by the pressure generator 17 of this system 14 a

F i g. 1 is a schematic representation of the wandering main pressure line 15 and a return line

the longwall construction with the omission of the hydraulic 16 along the coal face 2. Each expansion frame 4

see connections and the caps for the slope comprises a hydraulic control valve 18 to which the

end, io pressure line 15 and the return line 16 over

F i g. 2 shows a similar representation of part of the lines 19 and 21, respectively, are connected. The tax longwall construction on a larger scale and with the valve 18 of each expansion frame 4 is with its stem hydraulic Connections, pein 6, his frame rear cylinder 7 and (if

F i g. 3 a section through an anchoring provided) its anchoring rear cylinder 9

Rear cylinder and 15 connected. The control valve 18 each with a ver

F i g. 4 shows a section along line 4-4 in FIG. 3 anchoring rear cylinder 9 provided removal area omitting various parts. mens 4 can be set up so that the Rückzylin-

According to FIGS. 1 and 2, the wandering figure 9 comprises the conveyor 1 constantly in the direction of the longwall a longwall conveyor 1 which pushes itself forward on the coal pile 2, except when the coal pile extends along as a guide means ² ° building frame 4 is being advanced. Given for a cutting machine 3 acts and, if necessary, the control valve 18 can extend each provided with a coal for anchoring rear cylinder 9 cut by the cutting machine 3. Along the coal face 2, a row of hydraulic frames is to be operated in such a way that the cylinder-operated extension 9, designed as an expansion frame, is only arranged when it is desired in such a way that structural units 4 are struck on the coal, that the conveyor 1 is advanced in the direction of the joint 2 opposite side of the conveyor 1 coal pile 2. The control valve 18 lie. can e.g. B. by hand or by remote control of

Each extension frame 4 encloses the lying surface of a previous contact moving with a cutting machine 3 Sole piece 5 a number, according to the direction to be actuated to cause the the representation z. B-. three, hydraulically operated 30 return cylinders 9 the conveyor 1 in the direction of the the telescopic punch 6 and a slope coal face 2 advances.

at the end of the contacting cap (not shown) which is operated by a hydraulic control system each carried by the punches 6. Each expansion valve 18 such that its expansion frame vormen 4 has a single-acting hydraulically moves. The pressure generating system 14 includes an actuated frame back cylinder 7, which is arranged on the bottom piece 5 which is in contact with the hydraulic pressure source 22 for the control system, and a control line 23 extends from the piston rod of this back cylinder through the control pressure source 22 through the Control valves 18 a chain 8 is attached to the conveyor 1. This of the individual expansion frames through one after the other. Rear cylinder 7 is used to advance the expansion valve 18 first closes the control men 4 in the direction of the conveyor 1, 40 line 23. When the control pressure source 22 is actuated, the conveyor 1 acts as an anchor. In order to put the control line 23 under pressure, the chain 8 reduces the risk of any damage. B. the bending of the rear cylinder 7, as a signal for the control valve 18 of the first Ausdie would occur if the working cylinder 7 building frame 4, which would then be indirectly attached to the conveyor 1 in the following way and executes a feed process:
Creep of the conveyor 1 relative to the expansion path, ",,.,." , <■ "
men 4 entries. "Conveyor crawl" is used to ^{refer to a} ) ^the anchoring rear cylinder 9 (if viewed longitudinally before the support frame of the conveyor 1 is moved), the action on that of the coal pile 2 is referred to. Conveyor 1 in the direction of advancement

Some expansion frames 4 (for example, interrupt according to FIG. 5o;

Representation every fourth frame) have a double b) the stamps 6 are stolen and thus dated

pelt-acting, hydraulically operated anchoring hanging walls released;

Back cylinder 9 for advancing the conveyor 1 rela- _{c) the frame} _ _{back cylinder 7 is caused} to

To be preferred tiv to the expansion frame 4 using this expansion frame up to the conveyor 1;

Extension frame as a support. The cylinder 55

of the anchoring rear cylinder 9 rotatably engages d) after the advancement of the extension frame

an approach 11, which is ended from the side of the sole, interrupts the frame-Rückzylin-

piece 5 protrudes and is loosely in a sleeve 12 one of the 7 exerted on the expansion frame 4

which is hinged to the conveyor 1. When pulling forward, and the punches 6 are set,

As the conveyor 1 moves forward, the piston rod 13 60 around the extension frame 4 again acts against the

to clamp the anchoring rear cylinder 9 against the floor hanging wall,
of the sleeve 12 in the area of the conveyor 1. If the

Extension frame 4 is advanced, the If the extension frame 4 is again in a satisfactory

The piston rod of the anchoring rear cylinder 9 has been placed against the hanging wall in a similar manner

driven, and the loose fit of the anchoring 65 is, whereby the satisfactory setting by the

The return cylinder 9 within the sleeve 12 ensures a desired hydraulic pressure is reached in

that during the advancement of the expansion frame 4 the ram 6 is perceived, opens the

no lateral loads through the anchoring control valve 18 the control line 23, so that the

hydraulic pressure signal is passed on to the control valve 18 of the next expansion frame 4, the now executes a feed process. Thus, each expansion frame 4, when it is its turn, leads a feed process.

In accordance with the invention, a number of warning devices are provided. In the exemplary embodiment each rear cylinder 9 has a warning device for advancing the face conveyor. Fig. 3 4 and 4 show in detail a return device for advancing the conveyor, which includes the return cylinder 9 and the sleeve 12 encloses.

The rear cylinder 9 comprises a double-walled cylinder 25, which by two radially from each other Spaced tubes 26, 27 are formed which are closed at one end by a cover body 28 are. The cover body 28 receives an extension 29, by means of which the rear cylinder 9 is pivotable the approach 11 of its extension frame 4 attacks. The piston rod 13 carries a piston 31 which extends along the Inner wall of the tube 27 of the cylinder 25 slides sealingly, and the piston rod 13 protrudes through one The bottom body 32 of the cylinder 25 protruding from the rear cylinder 9.

In order to extend the piston rod 13 of the return cylinder 9, fluid under pressure is used recessed into the cylinder 25 through a conduit 33 in the cover body 28, and around the piston rod 13 of the rear cylinder 9 involve pressurized fluid an opening 34 provided in the tube 26 and through an opening provided in the tube 27 in let in the space of the cylinder 25 between the tubes 26 and 27.

The sleeve 12 has a sleeve base 36 which has two lugs 37 by means of which the sleeve 12 is pivotably articulated on the conveyor 1. The warning device consists of a support 39 which is attached to the outside of the sleeve 12 and carries a bell 38. A shaft 40 is mounted in two lugs 41 attached to the outside of the sleeve 12. The shaft 40 carries, on the one hand, a projection 42, which protrudes into the space inside the sleeve 12, and, on the other hand, a lever 43, to which an elastic stop arm 44 receiving an impactor 45 is attached. The lever 43 is made elastic by the combined action of two springs 46 and 47 in the position shown in FIG. 3 held position shown. The spring 46 is stretched between the lever 43 and a bell cap 48 which is attached to the outside of the sleeve 12. The spring 47 surrounds the shaft 40 and is stretched between the projection 42 and a cover plate 49 which is fastened to the lugs 41.

The end portion of the piston rod 13 protruding from the cylinder 25 takes a sleeve 51 which has four axially spaced circumferential projections 52 which are arranged so that they successively hit the projection 42 when the end portion of the piston rod 13 to the projection 42 moves past.

The in F i g. 3 position shown of the various parts of the rear device for advancing the The conveyor results when the expansion frame 4 has been fully advanced to the conveyor 1. When the conveyor 1 is to be advanced, the piston rod 13 becomes the anchoring rear cylinder 9 is extended by the pressurized fluid, and thus the piston rod moves 13 towards the case base 36. Only after the piston rod has placed itself against the bottom of the case has, the face conveyor 1 is advanced by further action on the rear cylinder 9.

When the piston rod moves in the direction of the sleeve bottom 36, the projections engage 52 successively the projection 42 and move the shaft 40 clockwise. This will make the Striker 45 struck against the adjacent portion of bell 38, and any subsequent movement of the projection 42 and the lever 43 causes elastic deflection of the stop arm 44. This movement of the piston rod 13 has no impact of the impact body 45 against the Bell 38 resulted in great force. As soon as the individual projections 52 leave the projection 42, the spring 47 leads the projection 42 into the position shown in FIG. 3 position shown back.

As already mentioned, the piston rod 13 of the rear cylinder 9 is immediately in front of the back of his Extension frame 4 retracted. Since the piston rod is still at the start of this retraction movement rests against the case base 36, capture the projections 52 one after the other during the retraction the protrusion 42, move the shaft 40 counterclockwise, thus causing movement of the impact body 45 away from the adjacent section of the bell 38. When the individual Projections 52 leave the projection 42, the spring 46 causes the impactor 45 with sufficient Force against the bell 38 strikes, so that a loud sound is emitted. Since there are four projections 52 in the exemplary embodiment, causes the retraction of the piston rod 13 into the rear cylinder produces four bell-like tones. These four tones therefore sound immediately in front of the back of the extension frame 4.

Thus, in this wandering longwall construction, immediately in front of the back of each support frame, which is equipped with a rear cylinder 9 for advancing the face conveyor, an audible warning signal given, with each warning emanating from a point near the extension frame that has advanced shall be.

Claims (2)

Patent claims: 1. Migrating longwall mining for underground operations, in which each individual is a plurality of extension frame with a particularly extending along the joint, as anchoring serving face conveyor via a single-acting frame rear cylinder and some of these Extension frame additionally with this face conveyor via a double-acting anchoring rear cylinder are in operative connection, characterized in that the anchoring rear cylinder (9) hinged to the extension frame (4) enclosed by a known sleeve (12) acting on the face conveyor (1) is, the storage of the anchoring rear cylinder (9) and the sleeve (12) also the other way round, and that between the end face of the cylinder (26, 27) emerging Piston rod (13) of the anchoring back cylinder (9) and the one with it for the purpose of back I 221 kens of the face conveyor (1) cooperating sleeve base (36) a free lift is proposed, along which the piston rod (13) to a signal or warning device attached to the sleeve (12) (38) works. 2. longwall mining according to claim 1, characterized in that the warning device (38) on the sleeve is arranged and has an actuating projection (42) which lies in the path of movement of the return cylinder piston rod (13) and on which the rear cylinder piston rod engages with stops (52). Documents considered: German Patent No. 924 686; German Auslegeschrift No. 1001221; French patent specification No. 1294 095. Older patents considered: German Patent No. 1150 342. 1 sheet of drawings 609 590/49 7.66 © Bundesdruckerei Berlin