EP0199712B1 - Vorrichtung zum intermittierenden Beaufschlagen von axial verschiebbaren Meisseln eines Schrämkopfes mit Druckmitteln - Google Patents

Vorrichtung zum intermittierenden Beaufschlagen von axial verschiebbaren Meisseln eines Schrämkopfes mit Druckmitteln Download PDF

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Publication number
EP0199712B1
EP0199712B1 EP86890101A EP86890101A EP0199712B1 EP 0199712 B1 EP0199712 B1 EP 0199712B1 EP 86890101 A EP86890101 A EP 86890101A EP 86890101 A EP86890101 A EP 86890101A EP 0199712 B1 EP0199712 B1 EP 0199712B1
Authority
EP
European Patent Office
Prior art keywords
head
cutter
valve
wheel
control
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
EP86890101A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0199712A2 (de
EP0199712A3 (en
Inventor
Herwig Wrulich
Wilfried Maier
Franz Dipl.-Ing. Schöffmann
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 EP0199712A2 publication Critical patent/EP0199712A2/de
Publication of EP0199712A3 publication Critical patent/EP0199712A3/de
Application granted granted Critical
Publication of EP0199712B1 publication Critical patent/EP0199712B1/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
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/187—Mining picks; Holders therefor with arrangement of fluid-spraying nozzles
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
    • E21C25/10—Rods; Drums
    • 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
    • E21C35/18—Mining picks; Holders therefor
    • 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 device for the intermittent application of axially displaceable chisels to a cutting head with pressure medium, in which a percussion piston presses the chisel outwards under the action of the pressure medium and is reset by the reaction force of the chisel when the pressure medium supply is switched off.
  • Cutting heads of this type are used in partial cutting machines in which at least one cutting head is rotatably mounted on a cutting arm which can be pivoted on all sides. Usually, two cutting heads are rotatably mounted on such cutting arms about an axis crossing or cutting the axis of the cutting arm. It is known to store the chisels of such a cutting head axially displaceably in chisel holders over a limited stroke, the displacement movement of the chisel being used, for example, to open a valve for spraying water through nozzles onto the working face.
  • EP-A-125232 has already disclosed a method and a device in which water was introduced into channels of a cutting head via a distributor bolt.
  • the chisel holder has a percussion piston behind the chisel, which intermittently applies pressure medium to the chisel and thus improves the cutting performance.
  • the distributor provided in this known design was arranged near the axis and was designed to be stationary relative to the rotating cutting head. Due to the small radial expansion of the distributor, which was essentially bolt-shaped, only a small number of openings could be provided on the circumference of the distributor, so that only low impact frequencies could be achieved.
  • Cutting heads of the type mentioned at the outset are usually operated at relatively low speeds in the order of 60 min- 1 , so that a limitation of the stroke frequency was also observed on the basis of this fact.
  • the invention is now aimed at developing a device of the type known from EP-A-125232 in such a way that high impact frequencies are possible without increasing the speed of the cutting head.
  • the invention essentially consists in that the pressure medium supply is controlled by a control slide designed as a bush with openings in the lateral surface, which can be brought into alignment with channels running in the cutting head to the working spaces of the percussion pistons, the control slide being non-rotatable or can be driven at a rotational speed different from the rotational speed of the cutting head.
  • the pressure medium distributor is designed as a sleeve-shaped control slide, in the lateral surface of which openings are provided, a larger number of precisely defined openings can be accommodated in the lateral surface due to the structurally possible larger diameter, so that even when the control slide rotates with the Bearing axis of the cutting head is connected, a substantial increase in the number of blows can be achieved in the unit of time.
  • the stroke frequency can, however, be significantly increased by the fact that the control slide can be driven at a rotation speed that differs from the speed of rotation of the cutting head, with a significant increase in the number of strokes particularly when the control slide and cutting head rotate in opposite directions, as corresponds to a preferred embodiment of the device according to the invention in the unit of time.
  • a gear is preferably provided for driving the control slide designed as a sleeve, the control slide being able to be driven by the cutting head for rotary movement with the interposition of this gear.
  • a particularly simple gear construction with which a corresponding transmission ratio can be achieved with a small footprint, can be achieved in that the control slide is connected to a gear, in particular has an internal toothing meshing with a central sun gear, which gear or sun gear through on a non-rotatable Carrier-mounted intermediate gears can be driven by a part of the cutting head designed as a ring gear.
  • the central sun gear can in this case be rotatably mounted directly on a rotationally fixed axial water supply bolt, so that it can be found with a small number of components and the overall length in the axial direction can be kept extremely short.
  • a particularly compact device can be achieved in that the carrier of the intermediate wheels is connected to the axial water supply bolt in a rotationally fixed manner.
  • the transmission can thus be accommodated entirely in the cavity of the control slide designed as a sleeve.
  • the entire device thus builds only in the radial direction, and compared to the known design according to EP-A-125232 no significant increase in the length in the axial direction is required. In the radial direction, the space created by moving the passage openings of the control slide to a larger diameter is fully used.
  • percussion pistons are pressurized with pressure medium, so that practically the full power is actually available for each chisel in engagement.
  • the pressure medium is usually made available in the form of water under a pressure of approximately 200 bar and can be pressed out via nozzles at the same time via appropriate throttle bores or only when the percussion pistons return under the influence of the reaction force of the chisel, so that effective dust removal takes place and the occurrence of excessive temperatures is avoided.
  • the sleeve-shaped control slide can be driven to rotate in opposite directions relative to the cutting head, pressure interruptions of up to two hundred times per second can be carried out with the construction according to the invention, as a result of which a high-frequency impact effect is achieved.
  • the sleeve-shaped control slide has about forty slots distributed over its circumference, which extend in the form of elongated holes in the axial direction.
  • the sleeve-shaped spool achieves an opposite speed of about 150 revolutions per minute.
  • FIG. 1 shows a cutting head rotatably mounted on a cutting arm, partly in section; 2 shows an enlarged illustration of the control slide including its drive in axial section; Fig. 3, the control slide in axial section and Fig. 4, the water supply pin partially in section.
  • a cutting arm is designated 1, on which a cutting head 3 is rotatably mounted about an axis 2.
  • a water supply opens, which is indicated schematically by 5 and merges into a distributor 6 in the axial region.
  • Channels 7 can be connected to the distributor 6, via which the water in the interior of the cutting heads reaches the chisel holders or outlet nozzles of the cutting head.
  • the distributor 6 is shown enlarged.
  • the distributor 6 contains a water supply bolt 9 which is held in a rotationally fixed manner via claws 8.
  • an intermediate piece 20 is provided which ensures the tight connection of the water supply line 5 to the water supply bolt 9.
  • a carrier 10 for gears 11 is fixed in rotation.
  • the bearing axes of the gear wheels 11, which are connected to the carrier 10, are designated 12 here.
  • a sun gear 13 is rotatably mounted, the teeth 14 of which mesh with the teeth of the intermediate wheels 11.
  • the intermediate gears 11 mesh on the opposite side with a ring gear 15 which is connected in a rotationally fixed manner to the part 16 of the cutting head 3 which is driven for rotary movement.
  • the rotationally fixed connection is ensured by the screw 17.
  • the ring gear 15 thus rotates at the same angular speed as the cutting head 3. Via the spaces 11 fixed on the rigid support 10, this rotary movement is transmitted to the sun gear 13, which is driven in opposite directions to the cutting head at a higher angular speed.
  • a sleeve-shaped control slide 18 is now connected in a rotationally fixed manner to the sun gear 13, for which purpose a toothing 19 of this sleeve-shaped control slide 18 meshes with the toothing 14 of the sun gear 13.
  • the sleeve-shaped control slide 18 is thus driven at the same angular velocity as the sun gear 13.
  • the water passes through the intermediate piece 20 into the water supply pin 9 and via a radial bore 21 of the water supply pin 9 into the gear space of the drive for the sleeve-shaped control slide 18.
  • the sleeve-shaped control slide 18 has openings 22 in its jacket, which can be brought into alignment with channels 7 of the cutting head. Sealing of the water supply space in the interior of the sleeve-shaped control slide 18 is ensured by the part 16 of the cutting head 3, the seals being designated by 23.
  • Fig. 3 the sleeve-shaped control slide 18 is drawn out separately.
  • the openings 22 formed by elongated holes in the lateral surface 24 are distributed equidistantly over the circumference of the sleeve-shaped control slide 18.
  • the inner toothing 19, which meshes with the outer toothing 14 of the sun gear 13, allows water to pass both into the cavity 25 inside the sleeve-shaped control slide 18 and outwards, this water in turn through bores 26 arranged in the end face into the interior 25 of the Control spool 18 can withdraw.
  • the water supply pin 9 is shown separately.
  • the water supply pin 9 has a coupling space 27 for the sealing reception of the intermediate piece 20.
  • An axial bore 28 is initially connected to this coupling space, into which the radial openings 21 open.
  • the sun gear 13 is freely rotatably mounted on the outer surface 29 of the water supply bolt 9.
  • the carrier 10 of the intermediate wheels 11 is coupled in a rotationally fixed manner to an annular rim 30 formed, for example, by a gear wheel.

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)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Retarders (AREA)
  • Shovels (AREA)
  • Drilling And Boring (AREA)
EP86890101A 1985-04-18 1986-04-11 Vorrichtung zum intermittierenden Beaufschlagen von axial verschiebbaren Meisseln eines Schrämkopfes mit Druckmitteln Expired EP0199712B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1166/85 1985-04-18
AT0116685A AT382206B (de) 1985-04-18 1985-04-18 Vorrichtung zum intermittierenden beaufschlagen von axial verschiebbaren meisseln eines schraemkopfes mit druckmittel

Publications (3)

Publication Number Publication Date
EP0199712A2 EP0199712A2 (de) 1986-10-29
EP0199712A3 EP0199712A3 (en) 1987-03-25
EP0199712B1 true EP0199712B1 (de) 1988-12-28

Family

ID=3508036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86890101A Expired EP0199712B1 (de) 1985-04-18 1986-04-11 Vorrichtung zum intermittierenden Beaufschlagen von axial verschiebbaren Meisseln eines Schrämkopfes mit Druckmitteln

Country Status (12)

Country Link
US (1) US4735458A (enrdf_load_stackoverflow)
EP (1) EP0199712B1 (enrdf_load_stackoverflow)
JP (1) JPS61246497A (enrdf_load_stackoverflow)
AT (1) AT382206B (enrdf_load_stackoverflow)
AU (1) AU582838B2 (enrdf_load_stackoverflow)
CS (1) CS268813B2 (enrdf_load_stackoverflow)
DE (1) DE3661564D1 (enrdf_load_stackoverflow)
ES (1) ES8702571A1 (enrdf_load_stackoverflow)
HU (1) HUT42581A (enrdf_load_stackoverflow)
IN (1) IN163515B (enrdf_load_stackoverflow)
MA (1) MA20665A1 (enrdf_load_stackoverflow)
ZA (1) ZA862055B (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389738B (de) * 1988-04-28 1990-01-25 Voest Alpine Ag Vorrichtung zum intermittierenden bespruehen von meisseln eines schraemkopfes
US5091783A (en) * 1990-03-01 1992-02-25 Texas Instruments Incorporated Still more feature for improved definition television digital processing units, systems, and methods
JP2545885Y2 (ja) * 1990-11-19 1997-08-27 旭光学工業株式会社 カメラの防水装置
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
EP2811113A1 (en) * 2013-06-06 2014-12-10 Caterpillar Global Mining Europe GmbH Modular cutting head
CN106194176B (zh) * 2016-08-31 2018-03-02 徐州徐工基础工程机械有限公司 一种用于掘进机的外置水路装置
CN114151082B (zh) * 2021-10-27 2023-12-12 中国矿业大学 一种自动高压射流辅助破岩及泡沫灭尘截齿装置
CN118088250B (zh) * 2024-04-26 2024-07-09 中铁开发投资集团有限公司 一种隧道活塞风降尘控制装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741316A (en) * 1968-01-16 1973-06-26 Forges Et Atellers De Meudon S Fluid operated percussion tool
CH528959A (de) * 1970-08-13 1972-10-15 Robbins Co Gestein-Schneidemaschine
DE2808915C2 (de) * 1978-03-02 1982-07-29 Gebr. Eickhoff, Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Walzenschrämmaschine für den Untertagebergbau
AT359453B (de) * 1979-02-09 1980-11-10 Voest Alpine Ag Schraemkopf
DE3048939C2 (de) * 1980-12-24 1982-12-30 Friedrich Wilhelm 4230 Wesel Paurat Vorrichtung zum Hereingewinnen und Fördern von Kohlen
DE3049146C2 (de) * 1980-12-24 1984-05-10 Friedrich Wilhelm 4230 Wesel Paurat Schrämwalze mit Sprühdüsen, welche in Bedüsungssektoren aufgeteilt ist
DE3139012C2 (de) * 1981-10-01 1985-02-21 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Walzenschrämmaschine für den Untertagebergbau
AT378037B (de) * 1982-09-09 1985-06-10 Voest Alpine Ag Vorrichtung fuer die zufuehrung einer unter druck stehenden fluessigkeit zu einem rotierenden maschinenteil
DE3235533C2 (de) * 1982-09-25 1986-09-18 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Schrämwalze mit auf ihrer Umfangsfläche angebrachten Düsen zum Absprühen von Flüssigkeit
AT378036B (de) * 1983-04-11 1985-06-10 Voest Alpine Ag Verfahren zum bespruehen der meissel und/oder der ortsbrust mit druckfluessigkeit sowie vorrichtung zur durchfuehrung dieses verfahrens
NZ207681A (en) * 1983-04-11 1986-03-14 Voest Alpine Ag Vibrating tooth cutter for rock
SE8403628D0 (sv) * 1984-07-09 1984-07-09 Cerac Inst Sa Vetskefordelningsanordning vid forskremningsmaskiner

Also Published As

Publication number Publication date
AU582838B2 (en) 1989-04-13
AT382206B (de) 1987-01-26
CS268813B2 (en) 1990-04-11
IN163515B (enrdf_load_stackoverflow) 1988-10-01
CS248086A2 (en) 1989-08-14
ATA116685A (de) 1986-06-15
JPS61246497A (ja) 1986-11-01
HUT42581A (en) 1987-07-28
US4735458A (en) 1988-04-05
DE3661564D1 (en) 1989-02-02
ZA862055B (en) 1987-01-28
MA20665A1 (fr) 1986-12-31
AU5495486A (en) 1986-10-23
EP0199712A2 (de) 1986-10-29
EP0199712A3 (en) 1987-03-25
ES8702571A1 (es) 1987-01-01
ES553673A0 (es) 1987-01-01

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