EP0163432A1 - Rotierender Schneidkopf - Google Patents

Rotierender Schneidkopf Download PDF

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Publication number
EP0163432A1
EP0163432A1 EP85303117A EP85303117A EP0163432A1 EP 0163432 A1 EP0163432 A1 EP 0163432A1 EP 85303117 A EP85303117 A EP 85303117A EP 85303117 A EP85303117 A EP 85303117A EP 0163432 A1 EP0163432 A1 EP 0163432A1
Authority
EP
European Patent Office
Prior art keywords
water
head
spokes
spoke
hub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85303117A
Other languages
English (en)
French (fr)
Other versions
EP0163432B1 (de
Inventor
George Albert Parrott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minnovation Ltd
Original Assignee
Minnovation Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnovation Ltd filed Critical Minnovation Ltd
Priority to AT85303117T priority Critical patent/ATE36034T1/de
Publication of EP0163432A1 publication Critical patent/EP0163432A1/de
Application granted granted Critical
Publication of EP0163432B1 publication Critical patent/EP0163432B1/de
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/22—Equipment for preventing the formation of, or for removal of, dust
    • E21C35/23—Distribution of spraying-fluids in rotating cutter-heads

Definitions

  • This invention relates to a rotary, mineral cutting head of a kind used extensively for mineral winning purposes e.g. coal mining, by being drivably mounted on mineral winning machine, usually known as a shearer, or alternatively of a kind used for the driving of underground roadways or tunnels, by being mounted on what is known as a roadheader machine.
  • rotary cutting head For either purpose of rotary cutting head, the latter is conventionally provided with a plurality of replaceable cutter picks, while furthermore the head is provided with what may be termed a "low pressure" water supply e.g., at 150 p.s.i. for various functions such as dust suppression, pick cooling, pick face flushing, pre-start warning and, in a mineral winning head, hollow shaft ventilation.
  • a low pressure water supply e.g., at 150 p.s.i.
  • various functions such as dust suppression, pick cooling, pick face flushing, pre-start warning and, in a mineral winning head, hollow shaft ventilation.
  • water jet cutting where water at substantially higher pressure e.g., at 5,000 p.s.i. is required.
  • the water flow path from the supply source on the machine in question to the water discharge nozzles on the head is complex and tortuous, incorporating several bends and consequently incorporating inherent pressure losses which can be tolerated in a low pressure system e.g., GB 1309005, but which are particularly disadvantageous in a high pressure system intended for water jet cutting uses, where efficiency end economics demand that the maximum pressure that can be generated by the associated pulping system is transmitted to the discharge nozzles.
  • the demands on the rotary water seals is not significant, but on the contrary with a high pressure system, incorporating high pressure rotary seals, these invariably have an unacceptably short service life.
  • a fabricated rotary cutting head comprising an outer barrel element supported from a central hub, the hub being provided with a water supply bore connectable to a source of high pressure water, a plurality of apertures provided at circumferentially spaced locations around the barrel element, and a plurality of water conveying spoke each penetrating an aperture and extending radially, or generally so, from the central hub to make fluid flow connection thereto at an inner spoke end with the source of pressurised water and provided at an outer spoke end with a water discharge nozzle to emit a water spray or jet of desired configuration.
  • the rotary cutting head in accordance with the present invention provides what in effect is a non-pressurised head, for the water pressure is confined within the spokes and consequently the head may have a greatly simplified construction and/or be fabricated to lower standards. Furthermore, it is possible to, incorporate a single bend adjacent the inner end of each spoke, with consequent minimal pressure loss between the supply source and the nozzle.
  • the outer barrel element In an embodiment of head intended for mineral winning operations, the outer barrel element would be cylindrical, while in an embodiment for roadway driving the outer barrel element would be frusto-conical.
  • a cutting head particularly for mineral winning operations would normally be provided with at least one helical vane' and also with a face ring adapted, in use, to be located remote from the associated mining machine and adjacent the mineral face, the vane(s) and face ring, being welded around the external periphery of the outer barrel element.
  • the vane(s) and face ring are each provided with a plurality of radially extending bores, each contiguous with an aperture of the outer barrel part, so that a radially outer portion of a spoke may be accommodated in a bore.
  • the face ring may be provided with nine bores, each housing a spoke, the latter extending radially inwardly from its nozzle (which may be screwed into the outer spoke end) and located at the periphery of the vane(s) and face ring. This inward location may be directly to the hub, or may be to a component carried by the hub and constituting a water distribution block.
  • the spokes may be rigid, such as a metallic (e.g. steel), tube, or may be flexible yet self-supporting such as a synthetic plastics tube e.g. of nylon (trade mark).
  • the spokes may terminate at the outer barrel element, or at a peripheral edge of a vane or face ring, or may extend beyond such edge by a first distance to a radially outer edge of a pick box, or by a further distance to a radially outer edge of a pick.
  • the outer end of a rigid spoke is resiliently located in its bore by interposing a resilient washer between the outer spoke periphery and the inner bore periphery.
  • the hub or its distribution block is conveniently provided with a number of sockets corresponding to the number of spokes, with an inner spoke end seated in each socket and provided with a water seal.
  • a rigid spoke may be provided with a collar, while the hub is provided with a securing ring having a plurality of pairs of forked arms.
  • the securing ring is retained on the hub by means of a circlip.
  • the inner end thereof is provided with an adaptor, of metal or synthetic plastics, which is at least partially located in the socket and is retained therein by a releasable latching means, e.g., a "U"-shaped staple, passing into an internal groove in the socket and an external groove in the adaptor.
  • a rotary, mineral cutting head comprising a plurality of holders for mineral cutter picks, and an internal network of water conveying piping, including at least one water inlet branch connectable to a source of high pressure water, at least one distribution branch in fluid flow communication with the inlet branch, and a plurality of spokes in fluid flow communication with the distribution branch and associated with the individual pick holders.
  • the cutting head in accordance with this proposal again avoids the imposition on the head of water pressure, as the high pressure water is confined within the network.
  • the pick holders may be constituted by sockets in the vane(s) or face ring; sockets in the' outer barrel part; sockets in boxes welded to the vane(s) or face ring or outer barrel part; or a male projection to receive a female apertured pick.
  • the rotary cutting head in accordance with the invention is preferably provided with conventional ducting for the lower pressure water supplies e.g. for pick face flushing, where pressure losses and sealing difficulties are not so significant.
  • a rotary, mineral cutting head 1 is rotatable about an axis 2 and is mounted, in the conventional manner, on a drive arbour of a shearer type mining machine.
  • the head 1 comprises a hub 3 over which is mounted a cylindrical, outer barrel element 4 welded to an inner, annular collar 5 which seats on an outer flange 6 of the hub 3, to be secured to that flange by a plurality of bolts 7 passing through aligned holes 8.
  • the hub 3 is provided with an axially extending water supply bore 9 connected at one end to a source of high pressure water, e.g. a pump, which may be mounted on the shearer or which may be statically located, e.g.
  • the outer barrel part 4 is provided with a plurality of radial apertures 10 at circumferentially spaced locations around its periphery, with a hollow, water-conveying spoke 11 of external diameter such that it may be readily housed at least partially within each aperture 10, the spokes 11 extending radially from the hub 3 and being in fluid flow connection with the bore 9.
  • a face ring 12 which carries mineral cutter picks 13, usually with interposed pick boxes, and which is provided with a number of bores 14 appropriate to the number of spokes 11, which number would usually correspond to the number of picks 13 carried by the face ring 12.
  • the spokes 11 are rigid, each being constituted by a steel tube. At its radially inner end, each spoke 11 is provided with a fitting 15 comprising a spigot portion 16. adapted to fit into a socket 17 provided directly in the hub 3, and in communication with the radial portion of bore 9. An enlarged collar 18 retains the spoke 11 in position, against the displacing effect of the water pressure, by engagement with a pair of forked arms 19 provided on a securing ring 20 surrounding the hub 3.
  • the spigot 16 also carries a pair of water seals 21 which engage the socket 17.
  • the spoke 11 At its radially outer end the spoke 11 is provided with a screw-in water discharge nozzle 22, while a resilient washer 23 is interposed between that spoke end and the bore 14.
  • a conventional ducting system 24 for the supply of low pressure water via tubing 25 for purposes such as pre-start warning.
  • each spoke 11A is of flexible, yet self-supporting synthetic plastics tube, such as nylon, which may, if required, be provided with an outer reinforcing braid.
  • each spoke 11 A is provided with an adaptor 16A retained, by means of a "U"- shaped staple 26, in a socket 17A provided in a water distriution block mounted on the end of the hub 3, the block being provided with an axial portion of the bore 9 and also with its radial portion, again to define a single bend.
  • a portion of a helical vane 27 in which the low pressure cucting 24 is provided.
  • the spokes 11A do not terminate adjacent the radially outer circumference of the face ring 12, but are provided with a connection fitting 28 by which an extension portion 11B of each spoke 11A may penetrate a suitable bore of a mineral cutter pick 13A.
  • the rotary, mineral cutter head 1B illustrated in Figure 3 is provided with an internal network 29 of water conveying piping, comprising an inlet branch 30 extending radially in spoke-like manner from the hub 3, at least one axially extending distribution branch 31 in fluid flow communication with the inlet branch 30, and a plurality of spokes 11B, and in both the face ring 12 and vane 27, in fluid flow communication with the distribution branch 31 and associated with individual picks 13A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Dowels (AREA)
  • Road Repair (AREA)
  • Drilling Tools (AREA)
EP85303117A 1984-05-04 1985-05-02 Rotierender Schneidkopf Expired EP0163432B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85303117T ATE36034T1 (de) 1984-05-04 1985-05-02 Rotierender schneidkopf.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8411526 1984-05-04
GB848411526A GB8411526D0 (en) 1984-05-04 1984-05-04 Rotary cutting head

Publications (2)

Publication Number Publication Date
EP0163432A1 true EP0163432A1 (de) 1985-12-04
EP0163432B1 EP0163432B1 (de) 1988-07-27

Family

ID=10560517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85303117A Expired EP0163432B1 (de) 1984-05-04 1985-05-02 Rotierender Schneidkopf

Country Status (4)

Country Link
EP (1) EP0163432B1 (de)
AT (1) ATE36034T1 (de)
DE (1) DE3564004D1 (de)
GB (1) GB8411526D0 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2134893A1 (de) * 1970-07-24 1972-02-03 Coal Industry (Patents) Ltd., London Umlaufender Schrämer für bergmännische Hereingewinnungsmaschinen
FR2242558A1 (en) * 1974-06-24 1975-03-28 Sscm Rotary drum coal cutting machine - water is supplied intermittently to spray nozzles between cutters
GB2015625A (en) * 1978-03-02 1979-09-12 Eickhoff Geb Liquid spray control in shearerloader type mining machines
US4219239A (en) * 1978-10-30 1980-08-26 Krampe & Co. Mining auger
GB2089868A (en) * 1980-12-24 1982-06-30 Paurat F Coal mining equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2134893A1 (de) * 1970-07-24 1972-02-03 Coal Industry (Patents) Ltd., London Umlaufender Schrämer für bergmännische Hereingewinnungsmaschinen
FR2242558A1 (en) * 1974-06-24 1975-03-28 Sscm Rotary drum coal cutting machine - water is supplied intermittently to spray nozzles between cutters
GB2015625A (en) * 1978-03-02 1979-09-12 Eickhoff Geb Liquid spray control in shearerloader type mining machines
US4219239A (en) * 1978-10-30 1980-08-26 Krampe & Co. Mining auger
GB2089868A (en) * 1980-12-24 1982-06-30 Paurat F Coal mining equipment

Also Published As

Publication number Publication date
DE3564004D1 (en) 1988-09-01
EP0163432B1 (de) 1988-07-27
ATE36034T1 (de) 1988-08-15
GB8411526D0 (en) 1984-06-13

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