EP2689104A2 - Dispositif de refroidissement de trépans - Google Patents

Dispositif de refroidissement de trépans

Info

Publication number
EP2689104A2
EP2689104A2 EP12712880.9A EP12712880A EP2689104A2 EP 2689104 A2 EP2689104 A2 EP 2689104A2 EP 12712880 A EP12712880 A EP 12712880A EP 2689104 A2 EP2689104 A2 EP 2689104A2
Authority
EP
European Patent Office
Prior art keywords
nozzles
group
cutting
cutting heads
nozzle
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
EP12712880.9A
Other languages
German (de)
English (en)
Other versions
EP2689104B1 (fr
Inventor
Reinhold Pogatschnigg
Christian SCHRUNNER
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.)
Sandvik Mining and Construction GmbH
Sandvik Mining and Construction Oy
Original Assignee
Sandvik Mining and Construction GmbH
Sandvik Mining and Construction Oy
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 Sandvik Mining and Construction GmbH, Sandvik Mining and Construction Oy filed Critical Sandvik Mining and Construction GmbH
Priority to PL12712880T priority Critical patent/PL2689104T3/pl
Publication of EP2689104A2 publication Critical patent/EP2689104A2/fr
Application granted granted Critical
Publication of EP2689104B1 publication Critical patent/EP2689104B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Definitions

  • the invention relates to a device for cooling chisels on a pivotable cutting arm about a transverse to the longitudinal direction of the lying, substantially horizontal axis rotatably mounted cutting heads mediated by water nozzles, wherein on each side of the Schrämarmes each a cutting head is mounted, which equipped with chisels .ist, - the cutting arm is formed at its disposed between the two Schrämköpfen free end as a gear neck and the Schrämarm a nozzle support member is arranged, which carries two groups of nozzles for each cutting head, of which. Nozzles of a first group are arranged in the region of the transmission neck between the cutting heads and of which the nozzles of the other group are arranged behind the cutting heads.
  • the invention further relates to a cutting machine comprising a pivotable cutting arm, the Schrämarm about a transverse to the longitudinal direction of the lying, substantially horizontal axis rotatably mounted Schrämköpfe, wherein on both sides of the Schrämarmes each a cutting head is mounted, which is equipped with chisels, and a device for cooling the chisels.
  • nozzles On a separate nozzle carrier.
  • One of "a plurality of individual nozzles existing Bedüsungsvorraum is known from EP 0010536 AI known, are incorporated in the nozzles arranged in parallel in a provided behind the cutting head nozzle carrier and the. Bit rows and the intermediate spaces are directed between the chisels, wherein the Water supply of different nozzle groups can be controlled individually.
  • a Wasserbedüsung the cutting head is known in which a nozzle beam is arranged in the protection of a cover behind the cutting head and the water jets are directed in the direction of the bit tip, and between the chisels on the working face.
  • DE 3609754 A1 discloses a spraying device for cutting rollers, in which the nozzles are supplied with water of at least 100 bar.
  • the nozzles are provided on a nozzle carrier behind the cutting head with different height and side orientation, forming a system of sharply focused to the working face down spray jets. Further nozzles are arranged on the front gear neck of the cutting arm for spraying onto the inner cutting zones of the cutting rollers.
  • the invention therefore aims to provide a Wasserbedüsungs- device, on the one hand, the water consumption is significantly reduced and on the other hand, the Ef ⁇ Anlagen ceremonial an outdoor spraying to safely prevent ignitions and flaring of mine gases can be increased.
  • the invention starting from a device of the type mentioned in the main is that the nozzles of both the first group and the second group each one of the perpendicular to the Rotation axis between the cutting heads extending center plane pioneering, laterally outwardly directed injection axes and have an exit angle, so that the spray cone adjacent nozzles overlap each other before hitting the working face.
  • the reduction of water consumption is also achieved by arranging the nozzles as close as possible to the cutting heads or the chisels.
  • the invention provides that a first group of nozzles is arranged in the region of the transmission neck between the cutting heads, so that the respective inner chisels of the two cutting heads can be detected in a simple manner by the coolant jet.
  • the portion of the nozzle support element carrying the second group of nozzles has second arms adjoining the first arms, which extend substantially parallel to the axis of rotation of the cutting heads.
  • the contour of the nozzle support element can be easily adapted to the outer contour of the cutting head in this way. Such a design is particularly advantageous if the two Schrämköpfe are formed outwardly with a tapered diameter.
  • the arrangement of the chisel on the cutting heads is basically arbitrary.
  • the chisels can be arranged for example in senk ⁇ right to the axis of rotation extending planes or rows.
  • the bits are arranged helically or helically on the casing of the cutting heads. In such a configuration, free spaces remain between the helical or helical rows of chisels, through which the coolant jets can pass with a corresponding alignment of the nozzle axes and, in particular, can be brought up to the working face.
  • the first group of nozzles comprises at least two nozzles, preferably four nozzles.
  • the second group of nozzles comprises at least four, preferably six nozzles.
  • the spray cone of at least part of the nozzles in this case has an opening angle of 20-40 °, preferably 30 °.
  • the design is preferably developed in such a way that the nozzle axes of the nozzles of the first group are inclined more towards the outside than the nozzle axes of the nozzles of the second group.
  • the nozzle axes of the nozzles of the first group may be inclined outward by 30-60 ° and the nozzle axes of the nozzles of the second group may be inclined outwards by 20-40 °.
  • the design is preferably such. that the spray cones of the outermost two nozzles of the second group of nozzles and possibly the outermost two nozzles of the first group of nozzles each overlap one another more than the spray cones of the other nozzles of the second group of nozzles.
  • nozzles preferably all nozzles
  • the flat jet nozzles can advantageously be arranged and aligned so that the entirety of their spray cone forms a closed shell in the upper Schrämkopf Suite.
  • the spray cone of at least one part of the flat jet nozzles preferably has an opening angle of 20-40 °, preferably 30 °, in the plane of the main axis.
  • the flat jet nozzles in this case form a very narrow in cross section elliptical Bedüsungsfowner and allow the maximum amount of water penetrates directly into a region of the bit holder to the bit tip and there causes the cooling. At the same time, this can significantly reduce the proportion of water which is blown out beyond the cutting head and accordingly generates no cooling effect.
  • an optimization of the atomization and the throwing distance of the water particles is already achieved with an operating pressure of 10 to 30 bar, in particular approximately 15 bar, so that no separate high-pressure unit is required on site.
  • the relatively narrow cooling jacket formed by the nozzles, in particular flat jet nozzles, along the cutting head surface is taken along by the rotation of the cutting head (Coanda effect), so that the cooling water directly at the contact point of the bit with the rock can develop its cooling effect.
  • the training is preferably developed in such a way that the nozzle trajectory geelement is arranged at the top of the cutting heads and the direction of rotation of the cutting heads is chosen so that the chisel on the face facing the working face of the cutting head move from top to bottom.
  • the spray axes of the nozzles are directed to the chisel.
  • FIG. 1 shows a front view of the cutting tool according to FIG. 1
  • FIG a side view and Figure 5 is another perspective view of the cutting tool according to Fig.l.
  • the cutting tool shown in Fig.l consists of two cutting heads 1 and 2, each carrying a variety of chisels 3 on their coat.
  • the cutting heads 1 and 2 are rotatably mounted in the direction of the arrow 4 about the schematically indicated rotation axis 5.
  • the chisel 3 are in this case inclined in the direction of rotation 4 forward.
  • the cutting heads 1 and 2 are free. End of a Schrämarms 6 stored, wherein the free end of the Schrämarms 6 is formed by a Geretehals 7, which is arranged between the two Schräm ⁇ heads 1 and 2 and usually receives the driven by the Schrämgetriebe Schrämkopfwelle.
  • the cutting heads 1 and 2 are designed such that their diameter decreases from the side facing the gear neck 7 to the side facing away from the gear neck 7 outside. Partial cutting machines with a cross cutting head trained, shown in Fig.l cutting tool are well known and therefore need no further explanation.
  • the chisel 3 are expediently arranged in approximately spiral-shaped arrangement on the cutting heads 1 and 2, as can be seen in particular in the plan view according to Figure 5. It is also possible to arrange the chisels 3 in parallel radial planes perpendicular to the axis of rotation 5.
  • a spraying device is arranged, which comprises a arranged on the upper side of the Schrämarms 6 nozzle support element 8.
  • the nozzle support element 8 comprises a central region 9, which is arranged in the region of the transmission neck 7 between the two cutting rollers 1 and 2.
  • the central portion 9 of the nozzle support member carries a first group of nozzles 10, 11, 12 and 13.
  • the spray axes of the nozzles 10 and 11 are directed from the standing between the cutting heads 1 and 2 perpendicular to the axis of rotation 5 center plane away to an outside and directed the spray axes of the nozzles 12 and 13 to the other outside.
  • the nozzle support member further comprises two lateral portions 14, each comprising a first arm 15 and a second arm 16.
  • the first arm 15 extends obliquely backwards and upwards, resulting in a V-shaped arrangement.
  • the first arms 15 are adjoined by second arms 16, which run essentially parallel to the axis of rotation 5.
  • the first arms 15 each have spray nozzles 17, 18, 19 and 20.
  • the second arms 16 have Spritzdü ⁇ sen 21 and 22.
  • the spray nozzles 10 to 13 and 17 to 22 are designed as flat ⁇ jet nozzles and have an exit angle, so that a spray cone ⁇ of, for example, from 30 ° results.
  • the spray characteristic of the nozzles is designed such that the spray cone with a first area. has diverging rays which merge into parallel rays in a subsequent region.
  • the plane of fanning of the water jet differs in the individual flat jet nozzles, it being apparent from the illustration according to FIG. 3 that the alignment of the flat jet nozzles takes place in such a way that an overall sheathing of cooling agents arises from the individual flat jet areas, which corresponds to the contour of the Cutting heads 1 and 2 substantially corresponds.
  • the flat-jet region 23 or 24 of the flat-jet nozzle 21 or 22 in the view according to FIG. 3 is more inclined than the flat-jet region 25 or 26 resulting from the nozzles 17 and 19.
  • the orientation of the nozzle axes of the individual nozzles is hit differently. This can be seen particularly clearly in FIG.
  • the spray axes of the nozzles 10 to 13 are inclined more outwardly than the spray axes of the nozzles 17 to 22.
  • the angle of inclination of the spray axes relative to the center plane indicated by 27 is schematically indicated by ß. It can be seen that there is also a difference in the inclination of the spray axes within the nozzles 17 to 22.
  • the spray axis of the outermost nozzles 21 and 22 is less inclined relative to the center plane 27 than the spray axis of the nozzles 17 to 20. This achieves optimum overlapping of the spray cone of the individual nozzles.
  • the overlap area of the outermost two nozzles 18 and 21 or 20 and 22 is greater than the overlap area of the inner two nozzles 17 and 18 or 19 and 20 Overlap region of the nozzles 10 and 11 or 12 and 13 also relatively large.
  • the spray axes of the nozzles 10 to 13 and 17 to 22 are inclined downwards.
  • the spray axes are oriented so that they are directed approximately to a point X, which corresponds to a position corresponding to the angle ⁇ , starting from the position indicated by 28.
  • the angle ⁇ is for example about 30 °.
  • the spray axes of the nozzles are additionally designated by 29.

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)
  • Harvester Elements (AREA)
  • Road Repair (AREA)

Abstract

L'invention concerne un dispositif pour refroidir des trépans, au moyen de buses d'eau, sur des têtes de havage (1, 2) qui sont montées sur un bras de havage pivotant (6) de façon à pouvoir tourner autour d'un axe (5) sensiblement horizontal, perpendiculaire à l'axe longitudinal du bras de havage. Une tête de havage (1, 2) équipée de trépans (3) est montée de chaque côté du bras de havage (6). Au niveau de son extrémité libre agencée entre les deux têtes de havage (1, 2), le bras de havage (6) se présente sous la forme d'un collet d'engrenage (7). Sur le bras de havage (6) est agencé un élément porte-buses (8) qui porte deux groupes de buses pour chaque tête de havage (1, 2), les buses d'un premier groupe (10, 11, 12, 13) étant disposées dans la zone du collet d'engrenage (7) entre les têtes de havage (1, 2) et les buses (17, 18, 19, 20, 21, 22) d'un deuxième groupe étant disposées derrière les têtes de havage (1, 2). Selon l'invention, les buses aussi bien du premier groupe que du deuxième groupe présentent respectivement un axe de pulvérisation qui s'écarte du plan médian (27) s'étendant perpendiculairement à l'axe de rotation (5) entre les têtes de havage (1, 2) et qui est dirigé latéralement vers l'extérieur, et présentent un angle de sortie (α) de sorte que les cônes de pulvérisation de buses adjacentes se chevauchent avant l'impact sur le front de taille.
EP12712880.9A 2011-03-23 2012-03-20 Dispositif de refroidissement de trépans Not-in-force EP2689104B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12712880T PL2689104T3 (pl) 2011-03-23 2012-03-20 Urządzenie do chłodzenia dłut

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA413/2011A AT511284B1 (de) 2011-03-23 2011-03-23 Einrichtung zum kühlen von meisseln
PCT/AT2012/000071 WO2012126028A2 (fr) 2011-03-23 2012-03-20 Dispositif de refroidissement de trépans

Publications (2)

Publication Number Publication Date
EP2689104A2 true EP2689104A2 (fr) 2014-01-29
EP2689104B1 EP2689104B1 (fr) 2014-12-31

Family

ID=45936568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12712880.9A Not-in-force EP2689104B1 (fr) 2011-03-23 2012-03-20 Dispositif de refroidissement de trépans

Country Status (7)

Country Link
EP (1) EP2689104B1 (fr)
CN (1) CN103221637B (fr)
AT (1) AT511284B1 (fr)
ES (1) ES2534134T3 (fr)
PL (1) PL2689104T3 (fr)
RU (1) RU2013124822A (fr)
WO (1) WO2012126028A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3064704B1 (fr) * 2015-03-05 2020-11-11 BETE DEUTSCHLAND GmbH Système de pulvérisation
US20200378253A1 (en) * 2017-04-20 2020-12-03 Sandvik Intellectual Property Ab Rotary cutting head with fluid supply ducting
CN111877972B (zh) * 2020-08-06 2025-02-11 浙江杭钻机械制造股份有限公司 液压旋挖机及其控制方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT358509B (de) 1978-10-10 1980-09-10 Voest Ag Einrichtung zum kuehlen der meissel von schraem- koepfen und der ortsbrust
DE3429170A1 (de) * 1984-08-08 1986-02-20 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Schraemarm fuer eine teilschnittmaschine mit zwei um eine im wesentlichen horizontale achse drehbaren schraemkoepfen
DE3609754A1 (de) * 1986-03-22 1987-09-24 Gewerk Eisenhuette Westfalia Beduesungseinrichtung fuer teilschnittmaschinen
DE4423166A1 (de) * 1994-07-04 1996-01-11 Krupp Maschinentechnik Hydraulikhammer mit Bedüsungsanordnung zur Staubbindung
AT407897B (de) * 1995-09-22 2001-07-25 Voest Alpine Bergtechnik Vorrichtung zur verringerung der zündgefahr beim einsatz von teilschnitt-streckenvortriebsmaschinen
CN1261126A (zh) * 1999-01-20 2000-07-26 兖州矿业(集团)有限责任公司东滩煤矿 采煤机机载高压荷电喷雾高效降尘系统
CN201531270U (zh) * 2009-10-27 2010-07-21 江孜 水雾围包式掘进机除尘器
DE102010022114A1 (de) * 2010-05-20 2011-11-24 Dh Mining System Gmbh Vorrichtung zur Wassernebelbedüsung
CN201763342U (zh) * 2010-09-15 2011-03-16 湖南永安煤矿机械制造有限公司 一种掘进机喷雾装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012126028A2 *

Also Published As

Publication number Publication date
WO2012126028A3 (fr) 2013-05-02
WO2012126028A2 (fr) 2012-09-27
AT511284A1 (de) 2012-10-15
EP2689104B1 (fr) 2014-12-31
ES2534134T3 (es) 2015-04-17
CN103221637B (zh) 2015-11-25
CN103221637A (zh) 2013-07-24
AT511284B1 (de) 2014-02-15
PL2689104T3 (pl) 2015-06-30
RU2013124822A (ru) 2014-12-10

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