EP0587991B1 - Pickholder for shears drum or cutting head - Google Patents

Pickholder for shears drum or cutting head Download PDF

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Publication number
EP0587991B1
EP0587991B1 EP93108254A EP93108254A EP0587991B1 EP 0587991 B1 EP0587991 B1 EP 0587991B1 EP 93108254 A EP93108254 A EP 93108254A EP 93108254 A EP93108254 A EP 93108254A EP 0587991 B1 EP0587991 B1 EP 0587991B1
Authority
EP
European Patent Office
Prior art keywords
pickholder
chamber
water nozzle
plug
opens
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 - Lifetime
Application number
EP93108254A
Other languages
German (de)
French (fr)
Other versions
EP0587991A3 (en
EP0587991A2 (en
Inventor
Reinhard Schiel
Walter Hemmer
Hans Dipl.-Ing. Krummenauer
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.)
Krummenauer & Co KG GmbH
Original Assignee
Krummenauer & Co KG GmbH
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Filing date
Publication date
Application filed by Krummenauer & Co KG GmbH filed Critical Krummenauer & Co KG GmbH
Publication of EP0587991A2 publication Critical patent/EP0587991A2/en
Publication of EP0587991A3 publication Critical patent/EP0587991A3/en
Application granted granted Critical
Publication of EP0587991B1 publication Critical patent/EP0587991B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the water nozzle can be screwed onto the screw plug, which closes the chamber at the rear, in the same way as it was previously screwed onto the bit holder, in which a feeder feeding the water nozzle is arranged, which connects to a channel drilled in the body of the bit holder .
  • the section of the cylindrical recess 7 lying in front of the end face of the plug 9 and the hexagon 17 forms, together with a conical section 20 which follows it and to which a cylindrical end section 21 is connected, a chamber 22. Leading into this chamber 22 on opposite sides two opening holes 23 as air inlets.

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  • 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)
  • Nozzles (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Earth Drilling (AREA)

Description

Die Erfindung betrifft einen Meißelhalter für eine Schrämwalze einer Gewinnungsmaschine des Untertage-Bergbaues oder einen Schneidkopf einer Strecken- oder Tunnelvortriebsmaschine, der eine, insbesondere hinter dem Meißel angeordnete, auf die Meißelspitze und/oder nahe der Meißelspitze auf das abzutragende Mineral gerichtete Wasserdüse aufweist, die in einer für den Strahl offenen, zurückliegenden Kammer angeordnet ist, in die sie von der Rückseite her eingesetzt ist.The invention relates to a chisel holder for a cutting roller of a mining machine for underground mining or a cutting head of a track or tunnel boring machine, which has a water nozzle, which is arranged, in particular behind the chisel, and is directed towards the chisel tip and / or near the chisel tip and the mineral to be removed is arranged in a back chamber open to the beam, into which it is inserted from the rear.

Mit einer Düse versehene Meißelhalter sind durch Benutzung vielfach bekannt.Chisel holders provided with a nozzle are widely known for their use.

Die, bevorzugt im Schutz hinter dem Meißel aufgeschraubte, Wasserdüse dient dem Zweck, Funken zu löschen und die Meißelspitze und/oder das gleichfalls erhitzte Mineral zu kühlen. Darüber hinaus bindet der von der Wasserdüse erzeugte Sprühstrahl Staub.The water nozzle, which is preferably screwed on behind the chisel, serves to extinguish sparks and to cool the chisel tip and / or the likewise heated mineral. In addition, the spray created by the water nozzle binds dust.

Zur Staubbekämpfung werden vornehmlich am Schrämwalzenkörper selbst wesentlich größere Düsen eingerichtet, die nach der DE-OS 36 06 996 durch ein wasserstrahlpumpenähnliches Ansaugen von Luft intensiv einen dichten Wassernebel erzeugen. Auch diese Düsen werden zweckmäßigerweise im Schutz der Meißel, bevorzugt unterhalb der auf Schraubengängen sitzenden Meißelhalter, angeordnet.For dust control, substantially larger nozzles are set up on the cutter body itself, which, according to DE-OS 36 06 996, generate a dense water mist intensively by sucking in air similar to a water jet pump. These nozzles are also expediently arranged in the protection of the chisel, preferably below the chisel holder seated on screw flights.

Ein Meißelhalter der eingangs genannten Art ist aus der DE 39 20 205 C1 in etwa bekannt. Er besteht nach dem Vorschlag dieser Schrift aus einem Grundkörper und einem auf diesen aufgesetzten, abnehmbaren Vorderteil, in dem die genannte Kammer ausgespart ist.A bit holder of the type mentioned is approximately known from DE 39 20 205 C1. According to the suggestion of this document, it consists of a base body and a removable front part placed on it, in which the said chamber is recessed.

In der Kammer liegt die Wasserdüse geschützt.The water nozzle is protected in the chamber.

Nach der GB 2 239 822 A ist eine Düseneinheit von der Rückseite des Meißelhalters her in eine vorne konisch verjüngte und eine Öffnung aufweisende Bohrung eingeschraubt. Die Düseneinheit füllt die, ihr angepaßte, Bohrung einschließlich der Verjüngung voll aus; die Mündung der Düseneinheit liegt in der Austrittsöffnung der Bohrung. Davor ist in dem Meißelhalter eine kammerähnliche Ausnehmung geformt.According to GB 2 239 822 A, a nozzle unit is screwed from the rear of the chisel holder into a bore that is conically tapered at the front and has an opening. The nozzle unit completely fills the bore adapted to it, including the taper; the mouth of the nozzle unit lies in the outlet opening of the bore. Before that, a chamber-like recess is formed in the chisel holder.

Der Erfindung liegt die Aufgabe zugrunde, die Wirksamkeit des von der Wasserdüse erzeugten Strahles zu erhöhen.The invention has for its object to increase the effectiveness of the jet generated by the water nozzle.

Gemäß der Erfindung wird dieser Zweck dadurch erfüllt, daß bei einem Meißelhalter der eingangs genannten Art in die genannte Kammer ein Lufteinlaß mündet.According to the invention, this purpose is achieved in that, in the case of a chisel holder of the type mentioned at the beginning, an air inlet opens into the chamber.

Durch den Lufteinlaß, vorzugsweise in Form mindestens einer seitlichen Öffnung, saugt der Strahl der Wasserdüse Luft an. Es entsteht ein Wasser-Luft-Sprühstrahl von größerer Gleichmäßigkeit als der reine Wasser-Sprühstrahl. Die größere Gleichmäßigkeit erlaubt es, bei im wesentlichen gleicher Kühlwirkung - der Luftanteil des Wasser-Luft-Sprühstrahles kühlt mit - und bei gleicher oder noch verbesserter Löschfähigkeit für Funken den Wasserverbrauch zu senken.
Auch die staubbindende Wirkung wird vergrößert, zumal staubbeladene Luft noch näher dem Ort der Staubentstehung, der Meißelspitze, angesaugt wird und dann mit Wasser vermischt wird als nach dem oben erwähnten bekannten Stand der Technik.
Zu unterscheiden von diesem Stand der Technik ist jedoch im übrigen, daß kein dichter Wassernebel erzeugt werden soll, sondern weiterhin ein scharf gebündelter und gerichteter, aber eben gleichmäßiger und weniger hart auftreffender Sprühstrahl.The jet of the water nozzle sucks in air through the air inlet, preferably in the form of at least one lateral opening. A water-air spray jet is created which is more uniform than the pure water spray jet. The greater uniformity allows the water consumption to be reduced with essentially the same cooling effect - the air portion of the water-air spray also cools - and with the same or even improved extinguishing capacity for sparks.
The dust-binding effect is also increased, especially since dust-laden air is sucked in even closer to the place where dust is generated, the chisel tip, and then mixed with water than in the known prior art mentioned above.
To be distinguished from this prior art, however, is that no dense water mist is to be generated, but rather a sharply focused and directed, but evenly uniform and less hard-hitting spray jet.

Um diesen Sprühstrahl zu erzeugen, weist vorzugsweise die Kammer im Anschluß an einen zylindrischen Abschnitt, in dem die Wasserdüse ausmündet, einen sich verjüngenden Abschnitt auf, dem ein wiederum zylindrischer letzter Abschnitt folgt, und es münden zwei auf gleicher Achse einander gegenüberliegende Öffnungs-Bohrungen etwa gleicher Breite wie die Kammer ein mit einer Erstreckung in Achsrichtung der Kammer etwa von der Ebene der Ausmündung der Wasserdüse bis in den genannten sich verjüngenden Abschnitt hinein.In order to generate this spray jet, the chamber preferably has, following a cylindrical section in which the water nozzle opens, a tapered section which is followed by a cylindrical last section, and approximately two opening bores open on the same axis same width as the chamber with an extension in the axial direction of the chamber approximately from the level of the mouth of the water nozzle into the tapered section mentioned.

Die Wasserdüse kann etwa in gleicher Weise, wie sie bisher auf den Meißelhalter geschraubt ist, auf einen die Kammer hinten abschließenden, eingeschraubten Stopfen geschraubt sein, in dem eine die Wasserdüse speisende Zuführung eingerichtet ist, die an einen in dem Körper des Meißelhalters gebohrten Kanal anschließt.The water nozzle can be screwed onto the screw plug, which closes the chamber at the rear, in the same way as it was previously screwed onto the bit holder, in which a feeder feeding the water nozzle is arranged, which connects to a channel drilled in the body of the bit holder .

Der Sechskant o. dgl., den der Stopfen braucht, um geschraubt werden zu können, bleibt infolge seiner rückseitigen Lage weitgehend von Verschleiß verschont. Ein Auswechseln des Stopfens mit der Düse ist daher praktisch immer möglich, während bisher die aufgeschraubte Düse so verschleißen konnte, daß sie mit keinem Schraubwerkzeug mehr zu fassen war.The hexagon or the like, which the plug needs to be able to be screwed, is largely spared from wear due to its rear position. It is therefore practically always possible to replace the plug with the nozzle, whereas previously the screwed-on nozzle could wear out so that it could no longer be grasped with a screwing tool.

Die Zeichnung gibt ein Ausführungsbeispiel der Erfindung wieder.

  • Fig. 1 zeigt einen axialen Schnitt durch einen Meißelhalter,
  • Fig. 2 zeigt einen Schnitt nach Linie II-II in Fig. 1.
The drawing shows an embodiment of the invention.
  • 1 shows an axial section through a chisel holder,
  • Fig. 2 shows a section along line II-II in Fig. 1st

Auf einem Schraubengang einer Schrämwalze, dessen äußere Kontur bei 1 dargestellt ist, ist ein Meißelhalter 2 angeschweißt. Darin sitzt in einer hier nicht näher zu beschreibenden Art ein Meißel 3.A bit holder 2 is welded onto a screw thread of a cutting roller, the outer contour of which is shown at 1. It contains a chisel 3 in a manner not described here.

Der Meißelhalter 2 weist an seiner Unterseite über einer Bohrung 4 in der Decke des Schraubenganges 1 eine flache Ausnehmung 5 auf. Von dieser führt ein Kanal 6 in eine zylindrische Ausnehmung 7.The chisel holder 2 has a flat recess 5 on its underside via a bore 4 in the ceiling of the screw thread 1. From this, a channel 6 leads into a cylindrical recess 7.

In der zylindrischen Ausnehmung 7 sitzt, eingeschraubt in ein an deren Ende eingeschnittenes Gewinde 8, ein Stopfen 9. Er ist an seinem einen, äußeren Ende, wo er mit einem Sechskant 10 von außen an dem Meißelhalter 2 anliegt, durch einen Dichtring 11 und an seinem inneren Ende durch einen Dichtring 12 gegenüber der Wand der zylindrischen Ausnehmung 7 abgedichtet. Dazwischen mündet der Kanal 6 in eine am Umfang des Stopfens 9 umlaufende ringförmige Ausnehmung, von der vier Radialbohrungen 14 in eine Axialbohrung 15 führen.
In ein Gewinde der Axialbohrung 15 ist eine Wasserdüse 16 eingeschraubt. Sie liegt vorne mit einem Sechskant 17 auf dem Stopfen 9 und weist hinten eine Ausnehmung auf, in der ein, weiter zurück in die Axialbohrung 15 hineinragender, Schmutzfilter 19 sitzt.A plug 9 is seated in the cylindrical recess 7, screwed into a thread 8 cut at its end. It is at its one outer end, where it rests against the bit holder 2 with a hexagon 10, through a sealing ring 11 and opposite its inner end by a sealing ring 12 sealed the wall of the cylindrical recess 7. In between, the channel 6 opens into an annular recess running around the circumference of the plug 9, from which four radial bores 14 lead into an axial bore 15.
A water nozzle 16 is screwed into a thread of the axial bore 15. It lies at the front with a hexagon 17 on the stopper 9 and has a recess in the back in which a dirt filter 19, which projects further back into the axial bore 15, is seated.

Der vor der Stirnseite des Stopfens 9 und dem Sechskant 17 liegende Abschnitt der zylindrischen Ausnehmung 7 bildet zusammen mit einem auf ihn folgenden konischen Abschnitt 20, an den sich ein wiederum zylindrischer Endabschnitt 21 anschießt, eine Kammer 22. In diese Kammer 22 führen auf gegenüberliegenden Seiten zwei Öffnungs-Bohrungen 23 als Lufteinlässe.The section of the cylindrical recess 7 lying in front of the end face of the plug 9 and the hexagon 17 forms, together with a conical section 20 which follows it and to which a cylindrical end section 21 is connected, a chamber 22. Leading into this chamber 22 on opposite sides two opening holes 23 as air inlets.

Ein die Wasserdüse 16 verlassender Sprühstrahl 24 reißt in der Kammer 22 durch die Öffnungs-Bohrungen 23 nachströmende Luft mit, so daß ein Wasser-Luft-Sprühstrahl 25 entsteht, der durch den zylindrischen Endabschnitt 21 hinter die Meißelspitze gerichtet ist und die Meißelspitze noch streift.A spray jet 24 leaving the water nozzle 16 entrains air flowing into the chamber 22 through the opening bores 23, so that a water-air spray jet 25 is formed which is directed through the cylindrical end section 21 behind the bit tip and still grazes the bit tip.

Claims (8)

  1. A pickholder (2) for a shearer drum of a shearer loader in underground mining or for a cutting head of a roadheader or a tunnelling machine, having a water nozzle (16) especially disposed behind the pick (3) and aimed at the pick tip and/or close to the pick tip at the mineral to be extracted, which water nozzle (16) is arranged in a set-back chamber (22) open for the jet (25), and is inserted into the chamber (22) from the rear,
    characterised in that
    an air inlet (23)opens into said chamber (22).
  2. The pickholder according to claim 1,
    characterised in that
    the air inlet (23) opens into the chamber (22) in the form of at least one side orifice (23).
  3. The pickholder according to claim 2,
    characterised by two orifice bores (23) facing one another on the same axis parallel to the shearer drum axis and preferably having approximately the same width as the chamber (22).
  4. The pickholder according to any of the claims 1 to 3,
    characterised in that
    the chamber (22) has a tapering section (20) following a cylindrical section (7) in which the water nozzle (16) discharges, the tapering section (20) preferably being followed in turn by a final, also cylindrical section (21).
  5. The pickholder according to claims 3 and 4,
    characterised in that
    the two orifice bores (23) reach in the axial direction of the chamber (22) approximately from the discharge plane of the water nozzle (16) on into the given tapering section (20).
  6. The pickholder according to any of the claims 1 to 5,
    characterised in that
    the chamber (22) is closed at the back by a screw-in plug (9) in a manner known per se and that the water nozzle (16) is inserted, preferably screwed, into the plug (9), with feed means (13-15) being arranged in the plug (4) which supply the water nozzle (16) and communicate with a passage (6) bored in the body of the pickholder (2).
  7. The pickholder according to claim 6,
    characterised in that
    the feed means (13-15) comprise an annular recess (13) in the periphery of the plug (9), at least one radial bore (14) starting from said recess (13), and an axial bore (15) into which the radial bore (14) opens.
  8. The pickholder according to claim 6 or 7,
    characterised in that
    the water nozzle (16) has a recess in its back into which a dirt filter (19) is inserted, preferably protruding into the given axial bore (15).
EP93108254A 1992-09-14 1993-05-21 Pickholder for shears drum or cutting head Expired - Lifetime EP0587991B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4230678 1992-09-14
DE4230678A DE4230678A1 (en) 1992-09-14 1992-09-14 Chisel holder for a cutting roller or a cutting head

Publications (3)

Publication Number Publication Date
EP0587991A2 EP0587991A2 (en) 1994-03-23
EP0587991A3 EP0587991A3 (en) 1994-03-30
EP0587991B1 true EP0587991B1 (en) 1997-03-26

Family

ID=6467894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108254A Expired - Lifetime EP0587991B1 (en) 1992-09-14 1993-05-21 Pickholder for shears drum or cutting head

Country Status (4)

Country Link
EP (1) EP0587991B1 (en)
CZ (1) CZ292136B6 (en)
DE (2) DE4230678A1 (en)
PL (1) PL172259B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2021204803B2 (en) * 2015-01-28 2023-02-23 Joy Global Underground Mining Llc Cutting bit assembly

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2818499A (en) * 1998-03-17 1999-10-11 Tamrock Voest-Alpine Bergtechnik Gesellschaft Mbh Nozzling device for chisel bits and a method for nozzling round shank chisel bits of a holing machine
ITMI20080338A1 (en) 2008-02-29 2009-09-01 Ergon Srl DIFFUSER FOR SHOWER AND RELATIVE SUPPLY NOZZLES
DE102010022113A1 (en) * 2010-05-20 2011-11-24 Dh Mining System Gmbh Nozzle for water mist spraying
CN102146793A (en) * 2011-01-14 2011-08-10 三一重型装备有限公司 Tunneller and cutting mechanism thereof
GB201119486D0 (en) 2011-11-11 2011-12-21 Minnovation Ltd Mineral cutter pick etc
US10830042B2 (en) 2016-09-19 2020-11-10 Minnovation Limited Cutter pick assembly with water spray assembly
CN106437704B (en) * 2016-12-01 2018-12-07 黑龙江科技大学 A kind of coal petrography cutting process and Novel cutting tooth

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2749830C2 (en) * 1977-11-08 1985-10-24 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Planing chisel
DE3202315C2 (en) * 1982-01-26 1985-05-09 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Loosening tool for a mining machine in underground mining
DE3443289C1 (en) * 1984-11-28 1993-02-11 Friedrich Wilhelm Paurat Method for reducing the ignition of mine gas when working a partially cut tunnel boring machine
DE3920205C1 (en) * 1989-05-17 1990-12-06 Fa. Michael Komotzki, 4600 Dortmund, De
GB2239822B (en) * 1990-01-16 1993-06-02 Minnovation Ltd Water spray unit for mining
GB9017070D0 (en) * 1990-08-03 1990-09-19 Tool & Steel Products Limited Mineral cutter pick boxes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2021204803B2 (en) * 2015-01-28 2023-02-23 Joy Global Underground Mining Llc Cutting bit assembly

Also Published As

Publication number Publication date
PL300288A1 (en) 1994-04-05
CZ292136B6 (en) 2003-08-13
EP0587991A3 (en) 1994-03-30
CZ190293A3 (en) 1994-04-13
DE4230678A1 (en) 1994-03-17
DE59305941D1 (en) 1997-04-30
PL172259B1 (en) 1997-08-29
EP0587991A2 (en) 1994-03-23

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