EP0108046B1 - Schrämkopf für Streckenvortriebsmaschinen sowie Verfahren zu seiner Herstellung - Google Patents

Schrämkopf für Streckenvortriebsmaschinen sowie Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0108046B1
EP0108046B1 EP83890139A EP83890139A EP0108046B1 EP 0108046 B1 EP0108046 B1 EP 0108046B1 EP 83890139 A EP83890139 A EP 83890139A EP 83890139 A EP83890139 A EP 83890139A EP 0108046 B1 EP0108046 B1 EP 0108046B1
Authority
EP
European Patent Office
Prior art keywords
cutting head
bores
axial direction
extending
resp
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.)
Expired
Application number
EP83890139A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0108046A1 (de
Inventor
Gottfried Traumüller
Wilfried Maier
Franz Dipl.-Ing. Schöffmann
Herwig Wrulich
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.)
Voestalpine AG
Original Assignee
Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0108046A1 publication Critical patent/EP0108046A1/de
Application granted granted Critical
Publication of EP0108046B1 publication Critical patent/EP0108046B1/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

  • the invention relates to a cutting head for tunnel boring machines with chisels arranged on the circumference thereof and outlet nozzles for the exit of cooling water, which can be supplied with water via channels running inside the cutting head in the axial direction, the basic body of the cutting head consisting of annular disks adjoining one another in the axial direction, which are welded together (see AT-A-359 453), as well as on a method for producing such a cutting head.
  • the outlet nozzles for the outlet of cooling water can also be used for the spraying of water for the purpose of depositing dust and a number of designs have become known in which such outlet nozzles are connected to the bit holder. With these designs, the water supply can be blocked or released by valves interacting with the chisels, and other controls for the supply of water are also possible. In all cases, it is necessary to equip the basic cutter body with appropriate channels to enable water to be supplied to the individual nozzles. As a rule, an axial water supply is provided for this purpose and from AT-A-359 453 a design has become known in which the water is distributed to the nozzles through an essentially cylindrical annular cavity which extends in the axial direction of the cutting head. The cutter head body mostly consists of cheap ferritic structural steel and is therefore susceptible to corrosion. In the known design, relatively high surface pressures acted in the radial direction within the essentially cylindrical cavity when the water was supplied under high pressure.
  • the invention now aims to further develop a cutting head of the type mentioned at the outset such that tightness is ensured at high feed pressures and the risk of corrosion at the welding points is reduced.
  • the invention consists essentially in the fact that the channels running within the cutting head in the axial direction of the same are designed as bores which penetrate the weld seams of adjacent disks of the basic body of the cutting head. Because the channels running in the axial direction of the cutting head are designed as bores, lower radial forces act at higher supply pressures in the sense of widening the cutting head than would be the case with a cylinder jacket.
  • Ferritic structural steel can be selected as the basic cutter body and the welding of the adjacent ring discs can be achieved in a cost-effective manner by melting ferritic electrodes.
  • the design is such that in the circumferential direction of the cutting head at least three bores are provided which run essentially parallel to the axis of the cutting head and which are closed at the end faces of the cutting head.
  • the method according to the invention for producing this cutting head is essentially characterized in that at least one of the facing end faces of the annular disks in the region of adjacent inner edges of the annular disks of the basic cutter body to be welded to one another is chamfered or stepped over a radial area whose radial extent is greater than that Diameter of the bores running in the axial direction, that the annular disks are welded while filling the cavity formed in this way, and that the bores running in the axial direction of the cutting head are drilled through these weld seams after the disks have been welded together.
  • a sufficiently large radial area is formed, in which the welding electrode can be melted off, so that it is ensured in the subsequent bore for the feed channels that this bore actually does Lich penetrates the weld.
  • the radial area of the chamfer or recess must therefore be larger than the diameter of the bore to be retrofitted.
  • FIG. 1 shows an axial section through a cutting head according to the prior art according to AT-A-359 453 and FIG. 2 shows an analog section through the design according to the invention.
  • the cutting head 1 is constructed from discs 2 welded together and rotatably supported on a cutting arm, not shown.
  • the last stage of the reduction gear is indicated by dashed lines at 3.
  • the cutting head 1 is mounted on a carrier connected to the cutting arm via roller bearings 5.
  • the water is first supplied via channels 6 in the carrier 4 and opens into a distributor space 7, via which it is guided via an axial feed line 8, which is sealed accordingly, and radial lines 9, into which distributor cavities 10 extending in the axial direction of the cutting head are guided.
  • the face plate 11 of the cutting head 1 is connected to the base body of the cutting head by screws.
  • the weld seams of the adjacent annular disks are exposed to the corrosion attack by the supplied water on an inner wall of the annular space 10.
  • the water passes from the annular space 10 via essentially radial bores 13 to the outlet nozzles, which can be accommodated in the bit holder.
  • At least three holes 14 are provided in the axial direction of the cutting head instead of the annular space 10, which are closed on both sides with closure pieces 15.
  • the design can also be such that the bore 14 is divided into two bores 16 which are connected to one another via a radial bore 17. Even with such an embodiment, the bores 14 and 16 can still be cleaned after the closure pieces 15 have been loosened.
  • the water supply to these bores 14 and 16, of which at least three are arranged distributed in the circumferential direction of the cutting head 1, can take place essentially analogously to the embodiment according to FIG. 1 and is not shown again.
  • the individual disks 2 are welded to one another with their end faces, one disk 2 each having a recess which extends in the radial direction indicated by the arrow 18 and which extends over a partial region a.
  • This partial area a is larger than the diameter b of the bores 14 and 16 and is filled by melting an electrode when the individual disks 2 are connected.
  • the holes 14 and 16 are now passed through the welds, which are designated by 19, so that there is a smooth inner surface as the wall of the hole.
  • the closure pieces 15 have a screw thread 20, which is screwed into a corresponding internal thread 21 on the end faces of the bores 14 and 16, respectively.
  • Such a design is also suitable for the supply of pressurized water due to the lower pressure which becomes effective in the radial direction a pressure of up to 300 bar to the outlet nozzles without the risk of mechanical stress on the welds

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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
EP83890139A 1982-09-03 1983-08-31 Schrämkopf für Streckenvortriebsmaschinen sowie Verfahren zu seiner Herstellung Expired EP0108046B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3310/82 1982-09-03
AT0331082A AT375151B (de) 1982-09-03 1982-09-03 Schraemkopf fuer streckenvortriebsmaschinen sowie verfahren zu seiner herstellung

Publications (2)

Publication Number Publication Date
EP0108046A1 EP0108046A1 (de) 1984-05-09
EP0108046B1 true EP0108046B1 (de) 1986-02-12

Family

ID=3548572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83890139A Expired EP0108046B1 (de) 1982-09-03 1983-08-31 Schrämkopf für Streckenvortriebsmaschinen sowie Verfahren zu seiner Herstellung

Country Status (17)

Country Link
US (1) US4572583A (ja)
EP (1) EP0108046B1 (ja)
JP (1) JPS5965200A (ja)
AT (1) AT375151B (ja)
AU (1) AU563154B2 (ja)
CA (1) CA1198456A (ja)
DE (1) DE3362124D1 (ja)
ES (2) ES525334A0 (ja)
HU (1) HU187094B (ja)
IN (1) IN158887B (ja)
MA (1) MA19889A1 (ja)
NZ (1) NZ205261A (ja)
PL (1) PL141542B1 (ja)
RO (1) RO88127A (ja)
SU (1) SU1322987A3 (ja)
YU (1) YU179483A (ja)
ZA (1) ZA835851B (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6857706B2 (en) * 2001-12-10 2005-02-22 Placer Dome Technical Services Limited Mining method for steeply dipping ore bodies
US7695071B2 (en) * 2002-10-15 2010-04-13 Minister Of Natural Resources Automated excavation machine
US7192093B2 (en) * 2004-04-23 2007-03-20 Placer Dome Technical Services Limited Excavation apparatus and method
CN109209470B (zh) * 2018-10-30 2023-10-20 河南鑫之辉机电设备有限公司 煤矿综采工作面降架移架虹吸式喷雾降尘装置及使用方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT359453B (de) * 1979-02-09 1980-11-10 Voest Alpine Ag Schraemkopf

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744535C (de) * 1938-07-12 1944-01-19 Bayerische Motoren Werke Ag Verfahren zum Verschweissen duennwandiger Rohre
DE803906C (de) * 1949-11-22 1951-04-12 Duerrwerke Akt Ges Befestigung von Hochdrucknippeln an Sammlern
US3037273A (en) * 1960-09-19 1962-06-05 Newport News S & D Co Method of making expansion joint
US3374033A (en) * 1966-02-21 1968-03-19 Lee Norse Co Cutter head having fluid supply means
AT281904B (de) * 1968-07-16 1970-06-10 Atlas Copco Mct Ab Einrichtung zur Messerkühlung bei Tunnel- bzw. Stollenvortriebsmaschinen, Gewinnungsmaschinen od.dgl.
FR2020495A5 (en) * 1969-02-10 1970-07-10 Nooter Corp Joining parts of sheet material having - corrosion-resistant ta coating
DE2448753C2 (de) * 1974-10-12 1977-09-15 Gewerkschaft Eisenhütte Westfalia, 4670 Lunen Schneidkopf fur Vortriebs- und Gewinnungsmaschinen im Berg- und Tunnelbau
CH595011A5 (ja) * 1975-06-19 1978-01-31 Bbc Brown Boveri & Cie
US4255641A (en) * 1978-05-08 1981-03-10 Crutcher Resources Corporation Method of outside welding of pipelines
DE3023530C2 (de) * 1980-06-24 1984-11-15 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Schrämwalze

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT359453B (de) * 1979-02-09 1980-11-10 Voest Alpine Ag Schraemkopf

Also Published As

Publication number Publication date
DE3362124D1 (en) 1986-03-27
SU1322987A3 (ru) 1987-07-07
ES8406626A1 (es) 1984-08-01
PL141542B1 (en) 1987-08-31
CA1198456A (en) 1985-12-24
YU179483A (en) 1988-02-29
NZ205261A (en) 1986-03-14
PL243561A1 (en) 1984-05-07
HU187094B (en) 1985-11-28
ES528955A0 (es) 1984-12-16
MA19889A1 (fr) 1984-04-01
US4572583A (en) 1986-02-25
RO88127B (ro) 1985-10-31
ES8502201A1 (es) 1984-12-16
RO88127A (ro) 1985-11-30
AU1760183A (en) 1984-03-08
ZA835851B (en) 1984-04-25
AT375151B (de) 1984-07-10
JPS5965200A (ja) 1984-04-13
ATA331082A (de) 1983-11-15
AU563154B2 (en) 1987-07-02
IN158887B (ja) 1987-02-14
EP0108046A1 (de) 1984-05-09
ES525334A0 (es) 1984-08-01

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