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

Priority Applications (5)

Applications Claiming Priority (2)

Publications (2)

Family

ID=45936568

Family Applications (1)

Country Status (7)

Cited By (1)

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Citations (3)

Family Cites Families (6)

• 2011
  • 2011-03-23 AT ATA413/2011A patent/AT511284B1/de not_active IP Right Cessation
• 2012
  • 2012-03-20 RU RU2013124822/03A patent/RU2013124822A/ru not_active Application Discontinuation
  • 2012-03-20 EP EP12712880.9A patent/EP2689104B1/de not_active Not-in-force
  • 2012-03-20 PL PL12712880T patent/PL2689104T3/pl unknown
  • 2012-03-20 CN CN201280003975.9A patent/CN103221637B/zh not_active Expired - Fee Related
  • 2012-03-20 WO PCT/AT2012/000071 patent/WO2012126028A2/de active Application Filing
  • 2012-03-20 ES ES12712880.9T patent/ES2534134T3/es active Active

Patent Citations (3)

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