EP0060827B1 - Dispositif de refroidissement pour le trépan d'une haveuse - Google Patents

Dispositif de refroidissement pour le trépan d'une haveuse Download PDF

Info

Publication number
EP0060827B1
EP0060827B1 EP82890023A EP82890023A EP0060827B1 EP 0060827 B1 EP0060827 B1 EP 0060827B1 EP 82890023 A EP82890023 A EP 82890023A EP 82890023 A EP82890023 A EP 82890023A EP 0060827 B1 EP0060827 B1 EP 0060827B1
Authority
EP
European Patent Office
Prior art keywords
bit
chisel
shaft
cooling means
valve
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
EP82890023A
Other languages
German (de)
English (en)
Other versions
EP0060827A1 (fr
Inventor
Herwig Wrulich
Alfred Zitz
Otto Dipl.-Ing. Schetina
Siegmar Gekle
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 EP0060827A1 publication Critical patent/EP0060827A1/fr
Application granted granted Critical
Publication of EP0060827B1 publication Critical patent/EP0060827B1/fr
Expired legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a device for cooling the chisel of a cutting machine with a nozzle arranged in the area of the chisel for the cooling water to be sprayed under pressure, to which the water supply can be shut off by a shut-off valve, the chisel on the chisel holder against the force of a spring and the hydraulic pressure of the cooling water is axially displaceably supported by the cutting pressure and the shut-off valve is coupled to the chisel by a coupling element such that it opens when the chisel is moved in the direction of the cutting pressure.
  • a coupling element such that it opens when the chisel is moved in the direction of the cutting pressure.
  • the spraying of the cooling water is interrupted during the period in which the chisel in question is not in operation, and therefore a considerable saving in cooling water is made possible.
  • This not only has the advantage of saving water, but above all the advantage that the sole is not excessively softened by water spraying out.
  • the chisel shaft is displaceably mounted in the chisel holder against a spring force and engages with a collar on the coupling element which actuates the shut-off valve.
  • This coupling element must be arranged on the outside of the chisel holder and is therefore exposed to damage during cutting operation.
  • the invention now aims to design the actuation of the shut-off valve so that it is reliable and secured against damage.
  • the invention essentially consists in the fact that the chisel is cap-shaped in a manner known per se and surrounds a chisel shank that can be inserted into the chisel holder, that the cap-shaped chisel is mounted axially displaceably on the shank.
  • Cap-shaped chisels which overlap the chisel shaft immovably inserted in the chisel holder and are rotatably arranged thereon, are known. Because the coupling element is now arranged in this chisel shaft, this coupling element is protected against dirt and damage by the cap-shaped chisel.
  • shut-off valve itself is also arranged in the chisel shaft creates a structurally simple design, since all the complicated parts are now arranged in the chisel shaft, which is protected by the cap-shaped chisel. It is now only necessary to arrange the guide holes for the cooling water in the nozzle in the chisel holder.
  • the arrangement is such that the shut-off valve, as known from EP-A-10534, closes against the direction of the cutting pressure and that the chisel shaft has a central bore in which an acting on the movable valve body optionally guided axially displaceably with this one-piece tappet, which forms the coupling element.
  • the movable valve body is expediently formed by a valve cone, but can also be formed by a ball. Ultimately, it is also possible to design this movable valve body as a slide, which is moved into the open position by the coupling element when the cutting pressure occurs in a slide mirror.
  • the design is expediently such that the movable valve body opens in the direction of the cutting pressure and the spring which loads the chisel against the cutting pressure is formed by the spring acting on the movable valve body.
  • a spring is sufficient, which both holds the valve in the closed position and loads the chisel against the cutting pressure.
  • the valve housing is preferably tubular and inserted into a central bore of the chisel shaft. This enables a simple design of the chisel shank, the machining of the chisel shank being restricted to simple turning and drilling work.
  • the cap-shaped chisel should be rotatably mounted on the chisel shaft and it is essential that the chisel can actually twist during operation and is not blocked by dust and contaminants entering the gap between the chisel shaft and the chisel, since in this case the cutting accuracy of the chisel in Question would be asked.
  • the inevitable consequence of this is that there is a certain, albeit small, gap between the inner wall of the cap-shaped chisel and the chisel shaft, and there is a risk that dust and other contaminants which hinder the rotary movement of the chisel will accumulate in this gap.
  • the tappet is expediently leaky in the bore of the chisel shaft and in a guide bore of the valve housing.
  • This allows water to escape from the valve along the tappet to the annular gap between the chisel and the chisel shaft, thereby making this annular gap so that contaminants that have penetrated into this annular gap are discharged to the outside.
  • This ensures that the chisel can be easily rotated on the chisel shaft.
  • a slotted ring in particular a sealing ring, is preferably used between the tappet and the guide bore of the valve housing, the slot of which forms a passage cross section for water. By dimensioning this slot, the water outlet can be limited to the minimum required for flushing the annular gap.
  • the invention is illustrated using an exemplary embodiment which shows an axial section through the chisel and the chisel shank and through the chisel holder.
  • the face 2 of the chisel holder 1 is welded to the cutting head.
  • a chisel shank 3 is inserted into the chisel holder 1 and is screwed in by means of a thread 4.
  • 5 is a seal.
  • a cap-shaped chisel 6 is rotatably mounted on the chisel shaft 3.
  • the annular groove 7 has a greater axial extension than the inserted circlip, so that the chisel 6 is axially displaceably mounted on the chisel shaft.
  • a plunger 10 is guided axially displaceably, which consists of one piece with a valve cone 11.
  • the valve cone 11 is pressed onto the valve seat 13 by a spring 12.
  • this spring also loads the chisel 6 against the cutting pressure via the plunger 10, so that the chisel 6 is raised by a dimension a from a shoulder 14 of the chisel shaft in the idle state.
  • the valve 11 is lifted from the seat against the force of the spring 12 and the chisel 6 sits on the shoulder 14.
  • the cooling water 15 is a bore arranged in the chisel shaft for the supply of the cooling water.
  • the cooling water passes through bores 17 into an annular space 18 and from here through bores 19 of a tubular valve housing 20 into the space 21 of the valve housing 20.
  • 22 is an annular filter which surrounds the valve housing 20 in the region of the bores 19 is laid around.
  • a sealing ring 32 is inserted into a groove 31 in the plunger 10.
  • This sealing ring which is made of hard plastic, for example, is slotted on its circumference, so that a small amount of water can pass out of the space 23.
  • the plunger 10 is guided in the bore 9 of the chisel shank 3 so that a slight amount of water can pass into the space 33 between the chisel shank 3 and the chisel 6 via the gap in the seal 32.
  • This water can escape through the annular gap 34 between the chisel shaft 3 and the chisel 6 at 35, so that this annular gap 34 is rinsed.
  • valve housing 20 is screwed into the chisel shaft 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Sawing (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Earth Drilling (AREA)

Claims (6)

1. Dispositif de refroidissement du trépan (6) d'une haveuse, comportant une buse (30), placée près du trépan (6), pour l'eau de refroidissement à projeter sous pression, buse dont l'arrivée d'eau peut être fermée par une soupape d'arrêt (11, 13, 20), le trépan (6) étant monté dans le porte-trépan (1) de façon à pouvoir être déplacé axialement dans une mesure limitée en raison de la pression d'attaque, en sens inverse de la force d'un ressort et de la pression hydraulique de l'eau de refroidissement et la soupage d'arrêt étant couplée au trépan, par un élément de couplage (10), de telle façon qu'elle s'ouvre quand le trépan se déplace dans le sens de la pression d'attaque, caractérisé en ce que le trépan (6) est en forme de capuchon, comme connu en soi, et entoure une tige (3) de trépan pouvant être placée dans le porte-trépan (1), en ce que le trépan (6) en forme de capuchon est monté sur la tige (3) de façon à pouvoir coulisser axialement et en ce que la soupape d'arrêt (11,-13, 20) et l'élément de couplage (10) sont placés dans la tige (3) du trépan.
2. Dispositif selon la revendication 1, caractérisé en ce que la soupage d'arrêt (11, 13, 20) se ferme en sens opposé de celui de la pression d'attaque et en ce que la tige (3) du trépan présente un trou central (9) dans lequel un poussoir (10) agissant sur le corps mobile (11) de la soupape, le cas échéant d'une pièce avec lui, peut se déplacer axialement, et constitue l'élément de couplage.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le corps mobile de soupape (11) ouvre dans le sens de la pression d'attaque et en ce que le ressort qui agit sur le trépan (6) en sens opposé de la pression d'attaque est constitué par le ressort (12) agissant sur le corps mobile (11) de soupape.
4. Dispositif selon la revendication 1, 2 ou 3, caractérisé en ce que le boîtier (20) de la soupape est tubulaire et logé dans un trou central de la tige (3) de trépan.
5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que le poussoir (10) est monté sans étanchéité dans le trou (9) de la tige (3) de trépan et dans un trou de guidage du boîtier (20) de la soupape.
6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce qu'il y a une bague fendue, en particulier une bague d'étanchéité (32), entre le poussoir (10) et le trou de guidage du boîtier (20) de la soupage, la fente constituant un passage pourI'eau.
EP82890023A 1981-03-12 1982-02-16 Dispositif de refroidissement pour le trépan d'une haveuse Expired EP0060827B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0113581A AT369859B (de) 1981-03-12 1981-03-12 Einrichtung zum kuehlen der meissel einer schraemmaschine
AT1135/81 1981-03-12

Publications (2)

Publication Number Publication Date
EP0060827A1 EP0060827A1 (fr) 1982-09-22
EP0060827B1 true EP0060827B1 (fr) 1984-05-09

Family

ID=3507354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890023A Expired EP0060827B1 (fr) 1981-03-12 1982-02-16 Dispositif de refroidissement pour le trépan d'une haveuse

Country Status (16)

Country Link
US (1) US4456306A (fr)
EP (1) EP0060827B1 (fr)
JP (1) JPS57163040A (fr)
AT (1) AT369859B (fr)
AU (1) AU547795B2 (fr)
BR (1) BR8201281A (fr)
CA (1) CA1176665A (fr)
DE (1) DE3260140D1 (fr)
ES (1) ES8302845A1 (fr)
IN (1) IN155702B (fr)
MX (1) MX6604E (fr)
PL (1) PL138252B1 (fr)
RO (1) RO84541B (fr)
SU (1) SU1269743A3 (fr)
YU (1) YU40082A (fr)
ZA (1) ZA821221B (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT370209B (de) * 1981-06-04 1983-03-10 Voest Alpine Ag Einrichtung zum kuehlen der meissel einer schraemmaschine
AT370208B (de) * 1981-06-04 1983-03-10 Voest Alpine Ag Einrichtung zum kuehlen der meissel einer schraemmaschine
SE452638B (sv) * 1982-03-10 1987-12-07 Sandvik Ab Anordning for vetsketillforsel vid roterande verktyg for brytning av fast material
AT375149B (de) * 1982-07-06 1984-07-10 Voest Alpine Ag Mit einer spruehvorrichtung ausgestatteter meisselhalter
DE3234993A1 (de) * 1982-09-22 1984-03-22 Bergwerksverband Gmbh, 4300 Essen Automatische teilbeduesung an schneidend arbeitenden gewinnungsmaschinen
DE3242137C2 (de) * 1982-11-13 1985-06-05 Ruhrkohle Ag, 4300 Essen Gedämpft geführter Rundschaftmeißel
US4664450A (en) * 1983-03-02 1987-05-12 Padley & Venables Limited Holder for a pick, and the combination of a pick and holder
GB2135715B (en) * 1983-03-02 1986-05-14 Padley & Venables Ltd Water sprayed, mineral mining pick assembly
NZ207681A (en) * 1983-04-11 1986-03-14 Voest Alpine Ag Vibrating tooth cutter for rock
US4569558A (en) * 1983-07-25 1986-02-11 The Regents Of The University Of California Drag bit construction
DE3436762A1 (de) * 1984-10-06 1986-04-10 Boart HWF GmbH & Co KG Hartmetallwerkzeugfabrik, 6419 Burghaun Schraemwerkzeug fuer insbesondere streckenvortriebsmaschinen
SE452495B (sv) * 1985-06-13 1987-11-30 Sandvik Ab Anordning for vetsketillforsel till ett verktyg for brytning av fasta material
DE3544126C1 (de) * 1985-12-13 1987-08-06 Boart Hwf Gmbh Co Kg Werkzeug zum Hereingewinnen von mineralischen Rohstoffen,insbesondere von Kohle oder Hartstein
US4765686A (en) * 1987-10-01 1988-08-23 Gte Valenite Corporation Rotatable cutting bit for a mining machine
AT389738B (de) * 1988-04-28 1990-01-25 Voest Alpine Ag Vorrichtung zum intermittierenden bespruehen von meisseln eines schraemkopfes
SE463725B (sv) * 1988-07-19 1991-01-14 Sandvik Ab Ventil
AT227U1 (de) * 1990-04-05 1995-05-26 Voest Alpine Bergtechnik Schneezaun
GB0017470D0 (en) * 2000-07-18 2000-08-30 Hydra Tools Int Plc Pick box for housing a mineral cutter pick
DE10261646B4 (de) * 2002-12-27 2010-02-25 Wirtgen Gmbh Schrämwerkzeug
US7234782B2 (en) * 2005-02-18 2007-06-26 Sandvik Intellectual Property Ab Tool holder block and sleeve retained therein by interference fit
CN101555792B (zh) * 2009-05-23 2011-07-20 山东卡特重工有限公司 一种可内喷雾的掘进机的闸板式喷嘴
US8215719B2 (en) * 2009-10-06 2012-07-10 Kennametal Inc. Rotatable cutting tool with through coolant

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1283777B (de) * 1967-11-22 1968-11-28 Austin Hoy And Company Ltd Sta Auswechselbare Schraemmeissel mit Meisselhalter und mit Zufuehrungen fuer Fluessigkeit
DE1998508U (de) * 1968-05-22 1968-12-19 Heinz Hoetten Vorrichtung zur berieselung von foerderwagen
SU685821A1 (ru) * 1978-06-29 1979-09-15 Копейский Ордена Трудового Красного Знамени Машиностроительный Завод Им. С.М.Кирова Режуща коронка горного комбайна
AT358510B (de) * 1978-10-19 1980-09-10 Voest Ag Einrichtung zum kuehlen der meissel des schraemwerkzeuges einer schraemmaschine und der ortsbrust
DE2854307A1 (de) * 1978-12-15 1980-07-03 Kennametal Inc Halter zur anbringung von meisseln, insbesondere von rundschaftmeisseln an bergbaulichen gewinnungs- und streckenvortriebsmaschinen

Also Published As

Publication number Publication date
YU40082A (en) 1986-02-28
MX6604E (es) 1985-08-14
PL235364A1 (fr) 1982-09-27
RO84541A (fr) 1984-06-21
EP0060827A1 (fr) 1982-09-22
ATA113581A (de) 1982-06-15
JPS6257795B2 (fr) 1987-12-02
SU1269743A3 (ru) 1986-11-07
RO84541B (ro) 1984-08-30
ES509902A0 (es) 1983-01-16
CA1176665A (fr) 1984-10-23
IN155702B (fr) 1985-02-23
US4456306A (en) 1984-06-26
PL138252B1 (en) 1986-08-30
BR8201281A (pt) 1983-01-18
ES8302845A1 (es) 1983-01-16
DE3260140D1 (en) 1984-06-14
ZA821221B (en) 1983-01-26
AU8072882A (en) 1982-09-16
AU547795B2 (en) 1985-11-07
AT369859B (de) 1983-02-10
JPS57163040A (en) 1982-10-07

Similar Documents

Publication Publication Date Title
EP0060827B1 (fr) Dispositif de refroidissement pour le trépan d'une haveuse
EP0099350B1 (fr) Porte-outil équipé d'un dispositif de projection d'eau
DE4327825C2 (de) Drosselrückschlagelement
DE2305668A1 (de) Kegelventil
DE3004970A1 (de) Selbstreinigendes ventil
DE3102884C2 (de) Schrämmeißel mit Wasserbedüsung
EP0067145B1 (fr) Dispositif de refroidissement pour les outils d'une haveuse
DE2506928A1 (de) Ueberdruckventil, insbesondere gebirgsschlagventil fuer hydraulische grubenstempel
EP0125232A1 (fr) Procédé pour l'abattage des roches et dispositif pour la mise en oeuvre de ce procédé
EP0067144B1 (fr) Dispositif de refroidissement pour les outils d'une haveuse
DE2821441C3 (de) Absperrventil für Bohrkronen, insbesondere Gesteinsbohrkronen
DE3721802A1 (de) Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes
DE3542274C2 (fr)
DE2731016A1 (de) Spritzpistole
DE3544126C1 (de) Werkzeug zum Hereingewinnen von mineralischen Rohstoffen,insbesondere von Kohle oder Hartstein
DE3007055C2 (de) Sprühdüse für eine Gewinnungsmaschine des Bergbaus
DE4238055C2 (de) Reinigungspistole zum handgesteuerten Durchlaß von Fluiden
DE2237239B2 (de) Bohrstrangventil
DE2017939B2 (de) Bohrgestaengeschwimmer
DE3411063C2 (fr)
DE10255953B3 (de) Vorrichtung zum Verhindern des Rückflusses von Kunstoffschmelze
DE3703114C2 (fr)
DE3630636C1 (de) Anordnung zur Steuerung der Fluessigkeitszufuhr zur einzelnen Spruehduese an einer Schraemwalze
DE19809850C1 (de) Düse zur Bedüsung der Schneidspur eines Meißels
DE2946661C2 (de) Sprühdüse für eine Gewinnungsmaschine des Bergbaues

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19820930

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3260140

Country of ref document: DE

Date of ref document: 19840614

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19850222

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890216

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19891027

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19891101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST