• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a device for cooling chisels on a pivotable cutting arm (6) about a transversely to the longitudinal direction of the same, substantially horizontal axis (5) rotatably mounted cutting heads (1, 2) mediated by water nozzles, wherein on both sides of the Schrämarmes ( 6) each a cutting head (1, 2) is mounted, which is equipped with chisels (3), the cutting arm (6) at its between the two cutting heads (1, 2) arranged free end is designed as a gear neck (7) and on Schrämarm (6) a nozzle support member (8) is arranged, for each cutting head (1, 2) carries two groups of nozzles, of which the nozzles (10, 11, 12, 13) of a first group in the region of the transmission neck (7) arranged between the cutting heads (1, 2) and of which the nozzles (17, 18, '19, 20, 21, 22) of a second group behind the cutting heads (6) are arranged, the nozzles of both the first group and the second group each one of the senk right to the axis of rotation (5) between the cutting heads (1,2) extending center plane (27) pioneering, laterally outward spray axis and have an exit angle (a), so that the spray cone adjacent nozzles overlap each other before hitting the working face.
    公开号:AT511284A1
    申请号:T413/2011
    申请日:2011-03-23
    公开日:2012-10-15
    发明作者:Reinhold Dipl Ing Pogatschnigg；Christian SCHRUNNER
    申请人:Sandvik Mining & Constr Oy；
    IPC主号:
    专利说明:

    1
    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 is, 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 carrying two groups of nozzles for each cutting head, of which arranged the nozzles of a first group in the region of the transmission neck between the Schrämköpfen 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 thereof, 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.
    When scraping occur on the chisels high temperatures, so that cooling the chisel is beneficial. But if, for example, when Schrämen of coal in the seam hard rock inclusions are present or even if layers of hard dead rock must be shrunk, so sparking may occur and such sparking again brings with it the risk of explosion of emerging from the seam mine gas with it. It has therefore already been proposed to supply the chisels cooling medium in the form of water. To a pollution and congestion of the 2
    To avoid spray nozzles during the cutting process, the water must be ejected from the nozzles under high pressure, and this again requires a large amount of water. Apart from the fact that thereby the water balance in the pit is impaired, bring also the large accumulating amounts of water difficulties, because the area is flooded in front of the working face. It also softens the sole, so that there is a risk that the cutting machine loses its grip. It has already been proposed to arrange the nozzles at the cutting head in the vicinity of each bit and to release the water supply to the nozzles only during the rotation angle of the cutting head during which the respective bits are engaged. This requires on the one hand a very complicated arrangement and on the other hand it is characterized by the fact that in this known arrangement, a high water pressure could not be handled by the shut-off and therefore the water was atomized by high pressure air, only an insufficient cooling of the working face achieved even the accumulating dust could not be sufficiently bound.
    It is therefore usually preferred to arrange the nozzles on a separate nozzle carrier. An existing from a plurality of individual nozzles Entüsungsvorrichtung is known from EP 0010536 Al, are mounted in the parallel nozzles in a provided behind the cutting head nozzle carrier and are directed to the rows of chisels and to the spaces between the bits, the water supply of different nozzle groups is individually controllable.
    From DE 3429170 Al 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 chisel 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 jet 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.
    However, in view of the high fluid pressure and the bundling of the spray jets towards the face, the water consumption for such a jetting device is still considerable, and the cooling capacity is only average.
    The invention therefore aims to a
    To provide Wasserbedüsungseinrichtung, with the one hand, the water consumption is significantly reduced and on the other hand, the effectiveness of Außenbedüsung to safely prevent ignitions and flaring of mine gases can be increased.
    In order to achieve this object, the invention essentially consists, starting from a device of the type mentioned at the outset, that the nozzles of both the first group and the second group guide one of the central planes perpendicular to the axis of rotation between the cutting heads, have laterally outwardly directed spray axes and have an exit angle, so that the spray cone adjacent nozzles overlap each other before hitting the working face. The fact that the spray cone adjacent nozzles overlap each other before hitting the working face, creates a kind of water jacket in the acted upon by the nozzles Schrämkopfbereich, so that a more or less regular distribution of water succeeds. The cooling is thus not only punctual to the effect, but over the entire width of the cutting heads, so on the one hand, the cooling performance is improved. On the other hand, it is possible to detect a plurality of chisels, each with a nozzle due to the laterally outward spray axes, so that the number of nozzles can be reduced and thereby the water consumption can be reduced.
    The reduction of water consumption is also achieved by arranging the nozzles as close as possible to the cutting heads or the chisels. In this context, 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. A particularly preferred arrangement of the individual nozzles in the immediate vicinity of the cutting head, so that the water jet occurs at high speed on the bit in order to reduce the possible residence time of an escaping methane gas, succeeds according to a preferred embodiment of the invention in that of the second group of nozzles supporting "···
    •············································································ t
    * · · · * »* * I 5
    Section of the nozzle support member has two laterally projecting from the cutting arm first arms, which are seen in the direction of the longitudinal extent of the Schrämarms V-shaped and preferably each inclined to the rear. In a further preferred embodiment, it can be provided that 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 planes or rows running perpendicular to the axis of rotation. Preferably, however, it is provided that 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.
    Due to the overlapping arrangement of the individual spray cones of the nozzles, the total number of nozzles for the purpose of reducing the water consumption can be reduced. A preferred development sees in this "." * "* * ** * *" * fl * * * * * ff * * * * * * * * * * * * * * P * * * * * * * * p 0 0 9 0 0 6
    In connection that the first group of nozzles comprises at least two nozzles, preferably four nozzles. Preferably, the second group of nozzles comprises at least four, preferably six nozzles. Thus, with a total of eight to twelve nozzles, one can endure. This is especially true if the nozzles have an exit angle that results in a corresponding spray cone, so that even with a small number of nozzles, the spray cones of two adjacent nozzles overlap. According to a preferred embodiment, the spray cone of at least part of the nozzles in this case has an opening angle of 20-40 °, preferably 30 °.
    In order to be able to design a protective sheath which is as closed as possible with the aid of the water jets even with a small number of nozzles, 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. In particular, 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 °. With such an alignment of the nozzle axes, if appropriate, the advantageous effect can be achieved further that the water jet penetrates optimally into the cutting tracks.
    In order to be able to cover the area of known Zündgefahren more secure, the training is preferably developed such that the spray cone 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 each other stronger than the spray cone of other nozzles of the second group of nozzles. ** 4 «* * ΦΦ» · II φφφφ • · · · · · · · · φ β · * * ΦΦφ | φ *
    An optimized in terms of water consumption training results according to a preferred embodiment, if at least a portion of the nozzles, preferably all nozzles are designed as flat jet nozzles whose spray cone preferably has an elliptical diameter, wherein the length of the major axis of the ellipse a multiple of the length of the minor axis corresponds to the ellipse. 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 Schrämkopfbereich. Preferably, the spray cone of at least a portion of the flat jet nozzles in the plane of the main axis has an opening angle of 20-40 °, preferably 30 °. The flat jet nozzles in this case form a very narrow in cross section elliptical Bedüsungsfächer and allow the maximum amount of water penetrates directly into an area 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 produces no cooling effect.
    Basically, according to a preferred development, 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.
    Particularly advantageous effects arise when the through the nozzles, in particular flat jet nozzles, forming relatively narrow cooling jacket along the Schrämkopfoberflache due to the rotation of the cutting head 8 is taken (Coanda effect), so that the cooling water directly at the contact point of the chisel with the rock his Can develop cooling effect. The training is in this context preferably further developed such that the nozzle support member is disposed at the top of the cutting heads and the direction of rotation of the cutting heads is selected so that the chisel on the face facing the working face of the cutting head move from top to bottom.
    Furthermore, it can preferably be provided that the spray axes of the nozzles are directed to the chisel.
    The invention will be explained in more detail with reference to embodiments shown schematically in the drawing. FIG. 2 shows the cutting tool according to FIG. 1 in a plan view, FIG. 3 shows the cutting tool according to FIG. 1 in a front view, FIG. 4 shows the cutting tool according to FIG. 1 in a side view and FIG. 5 shows a further perspective view of the cutting tool according to FIG.
    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 oblique heads 1 and 2 are mounted at the free end of a Schrämarms 6, wherein the free end of the Schrämarms 6 is formed by a Getriebehals 7 which is disposed between the two Schrämköpfen 1 and 2 and usually receives the driven by the Schrämgetriebe Schrämkopfwelle 9 , 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. Teilschnittschrämmaschinen with a trained as Querschneidkopf, 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.
    On Schrämarm 6 immediately below the cutting heads 1 and 2, 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. In this case, 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 10 17, 18, 19 and 20. The second arms 16 have spray nozzles 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 splash cone α of, for example, 30 ° results. The spray characteristic of the nozzles is designed in such a way that the spray cone has a first region with divergent 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 jacket of cooling agents arises from the individual flat jet areas, which contour corresponds to the cutting heads 1 or 2 substantially corresponds. Thus, 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.
    Furthermore, the orientation of the nozzle axes of the individual nozzles is hit differently. This can be seen particularly clearly in FIG. In particular, 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. In particular, the spray axis of the outermost nozzles 21 and 22 is less inclined relative to the center plane 27 than the eleventh
    Spray axis of the nozzles 17 to 20. This optimum overlap of the spray cone of the individual nozzles is achieved. It can be observed in particular that the overlap region of the outermost two nozzles 18 and 21 or 20 and 22 is greater than the overlap region of the inner two nozzles 17 and 18 or 19 and 20. Further, the overlapping region of the nozzles 10 and 11 or 12 and 13 are also relatively large.
    In the side view according to Figure 4 it can be seen that the spray axes of the nozzles 10 to 13 and 17 to 22 are inclined downwards. In particular, the spray axes are oriented so that they are directed approximately to a point X, which corresponds to a position corresponding to the angle γ, starting from the position indicated by 28. The angle γ is for example about 30 °.
    In Fig. 5, the spray axes of the nozzles are additionally designated by 29.
    权利要求:
    Claims (17)
    [1]
    * · 12 * · 12

    1. Device for cooling chisels on at a pivotable Schrämarm (6) about a transverse to the longitudinal direction of the lying, substantially horizontal axis (5) rotatably mounted cutting heads mediated by water nozzles, wherein on both sides of the Schrämarmes (6) each a cutting head (1, 2) is mounted, which is equipped with chisels (3), the cutting arm (6) at its between the two cutting heads (1, 2) arranged free end is designed as a gear neck (7) and on the cutting arm (6 ) a nozzle support member (8) is arranged, for each cutting head (1, 2) carries two groups of nozzles, of which the nozzles (10, 11, 12, 13) of a first group in the region of the transmission neck (7) between the cutting heads (1, 2) and of which the nozzles (17, 18, 19, 20, 21, 22) of a second group are arranged behind the cutting heads (1, 2), characterized in that the nozzles of both the first group and the second Gru ppe each have one of the perpendicular to the axis of rotation (5) between the cutting heads (1, 2) extending center plane (27) pioneering, laterally directed outward injection axes and an exit angle (a), so that the spray cone adjacent nozzle each other before hitting overlap the working face.
    [2]
    2. Device according to claim 1, characterized in that the second group of nozzles carrying portion (14) of the nozzle support member (8) has two laterally from the cutting arm (6) projecting first arms (15), in the direction of the longitudinal extent of the Schrämarms (6) seen V-shaped and are preferably each inclined backwards.
    [3]
    3. Device according to claim 2, characterized in that the second group of nozzles carrying portion (14) of the nozzle support member (8) to the first arms (15) each subsequent second arms (16) substantially parallel to the axis of rotation ( 5) of the cutting heads (1, 2) run.
    [4]
    4. Device according to one of claims 1 to 3, characterized in that the first group of nozzles comprises at least two nozzles, preferably four nozzles.
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the second group of nozzles comprises at least four, preferably six nozzles.
    [6]
    6. Device according to one of claims 1 to 5, characterized in that at least a portion of the nozzles, preferably all nozzles are formed as flat jet nozzles whose spray cone preferably has an elliptical diameter, wherein the length of the major axis of the ellipse a multiple of the length of Minor axis of the ellipse corresponds.
    [7]
    7. Device according to claim 6, characterized in that the flat jet nozzles are arranged and aligned so that the entirety of their spray cone forms a closed jacket in the upper Schrämkopfbereich.
    [8]
    8. Device according to one of claims 1 to 4, characterized in that the spray cone of at least a portion of the nozzle has an opening angle (a) of 20 - 40 °, preferably 30 °. 14 »·
    [9]
    9. Device according to claim 6 or 7, characterized in that the spray cone of at least a portion of the flat jet nozzles in the plane of the main axis has an opening angle (a) of 20 - 40 °, preferably 30 °.
    [10]
    10. Device according to one of claims 1 to 9, characterized in 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.
    [11]
    11. Device according to one of claims 1 to 10, characterized in that the nozzle axes of the nozzles of the first group are inclined by 30 - 60 ° to the outside.
    [12]
    12. Device according to one of claims 1 to 11, characterized in that the nozzle axes of the nozzles of the second group are inclined by 20-40 ° to the outside.
    [13]
    13. Device according to one of claims 1 to 12, characterized in that the spray cone of the outermost two nozzles (21, 18, 22, 20) of the second group of nozzles and possibly the outermost two nozzles (10, 11, 12, 13 ) 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.
    [14]
    14. Device according to one of claims 1 to 13, characterized in that the chisel (3) helically or spirally on the jacket of the cutting heads (1, 2) are arranged.
    [15]
    15. Device according to one of claims 1 to 14, characterized in that the nozzle support element (8) at the top of the cutting heads (1, 2} is arranged and the direction of rotation of the Schrämköpfe {1, 2) is chosen so that the chisel (3) move from top to bottom on the side of the cutting head facing the working face.
    [16]
    16. Device according to one of claims 1 to 15, characterized in that the spray axes of the nozzles are directed to the bit (3).
    [17]
    17 cutting machine comprising a pivotable Schrämarm (6), on Schrämarm (6} about a transverse to the longitudinal direction thereof, substantially horizontal axis (5) rotatably mounted Schrämköpfe (1, 2), wherein on both sides of the Schrämarmes (6) each a cutting head (1, 2) is mounted, which is equipped with chisels (3), and a device for cooling the chisels according to one of claims 1 to 16. Vienna, 23 March 2011 Applicant by: Haffne Paten
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    同族专利:
    公开号 | 公开日
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    CN103221637B|2015-11-25|
    ES2534134T3|2015-04-17|
    EP2689104A2|2014-01-29|
    EP2689104B1|2014-12-31|
    AT511284B1|2014-02-15|
    WO2012126028A3|2013-05-02|
    RU2013124822A|2014-12-10|
    WO2012126028A2|2012-09-27|
    PL2689104T3|2015-06-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1997011255A1|1995-09-22|1997-03-27|Tamrock Voest-Alpine Bergtechnik Gesellschaft Mbh|Device for reducing the danger of inflammability during the operation of a partial-cut tunnelling machine|
    AT358509B|1978-10-10|1980-09-10|Voest Ag|DEVICE FOR COOLING THE CHISELS OF SCREWING HEADS AND THE LOCAL CHEST|
    DE3429170C2|1984-08-08|1990-12-20|Gewerkschaft Eisenhuette Westfalia Gmbh, 4670 Luenen, De|
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    DE4423166A1|1994-07-04|1996-01-11|Krupp Maschinentechnik|Hydraulic hammer with nozzle arrangement for dust binding|
    CN1261126A|1999-01-20|2000-07-26|兖州矿业有限责任公司东滩煤矿|Efficient dusting system carried by coal-mining machine by means of high-voltage charging and mist spray|
    CN201531270U|2009-10-27|2010-07-21|江孜|Water spray surrounded dust collector of excavating machine|
    DE102010022114A1|2010-05-20|2011-11-24|Dh Mining System Gmbh|Device for water mist spraying|
    CN201763342U|2010-09-15|2011-03-16|湖南永安煤矿机械制造有限公司|Spraying device of tunneling machine|EP3064704B1|2015-03-05|2020-11-11|BETE DEUTSCHLAND GmbH|Spray system|
    US20200378253A1|2017-04-20|2020-12-03|Sandvik Intellectual Property Ab|Rotary cutting head with fluid supply ducting|
    法律状态:
    2016-11-15| MM01| Lapse because of not paying annual fees|Effective date: 20160323 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA413/2011A|AT511284B1|2011-03-23|2011-03-23|DEVICE FOR COOLING CHISELS|ATA413/2011A| AT511284B1|2011-03-23|2011-03-23|DEVICE FOR COOLING CHISELS|
    PL12712880T| PL2689104T3|2011-03-23|2012-03-20|Device for cooling chisels|
    EP12712880.9A| EP2689104B1|2011-03-23|2012-03-20|Device for cooling chisels|
    PCT/AT2012/000071| WO2012126028A2|2011-03-23|2012-03-20|Device for cooling chisels|
    CN201280003975.9A| CN103221637B|2011-03-23|2012-03-20|For cooling the device of chisel|
    ES12712880.9T| ES2534134T3|2011-03-23|2012-03-20|Installation for cooling of the trephines|
    RU2013124822/03A| RU2013124822A|2011-03-23|2012-03-20|COOLER COOLER|
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