EP0990088B1 - Bedüsungseinrichtung für meissel sowie verfahren zum bedüsen der rundschaftmeissel einer schrämeinrichtung - Google Patents
Bedüsungseinrichtung für meissel sowie verfahren zum bedüsen der rundschaftmeissel einer schrämeinrichtung Download PDFInfo
- Publication number
- EP0990088B1 EP0990088B1 EP99908666A EP99908666A EP0990088B1 EP 0990088 B1 EP0990088 B1 EP 0990088B1 EP 99908666 A EP99908666 A EP 99908666A EP 99908666 A EP99908666 A EP 99908666A EP 0990088 B1 EP0990088 B1 EP 0990088B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- chisel
- chisels
- nozzles
- nozzling
- 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
Links
- 238000000034 method Methods 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000011435 rock Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 17
- 238000005507 spraying Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000007921 spray Substances 0.000 description 4
- 238000012549 training Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 206010061218 Inflammation Diseases 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004054 inflammatory process Effects 0.000 description 2
- 238000010943 off-gassing Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- -1 tungsten carbides Chemical class 0.000 description 1
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
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
- E21C35/23—Distribution of spraying-fluids in rotating cutter-heads
-
- 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 spraying device for Chisel of a cutting device in which the chisel is used as a round shank chisel formed with a hard material or hard metal insert and the nozzles are oriented in the direction of the cutting track are, the water supply via a sector control over part of the revolution of the cutting heads or cutting rollers takes place, as well as on a method for spraying the picks a cutting device.
- Chisel holders equipped with a spray device are, for example can be found in AT-B 375 149. Bedüsungs spuren primarily serve for chisels of cutting heads the purpose of dust control and to avoid the risk of ignition of an emerging methane gas-air mixture. By cooling the chisel should naturally also reduce wear become. The previous training courses have primarily the safety aspects in the pit as the primary goal of the Striving for improvements.
- the one described in AT-B 375 149 Chisel holder is an axially displaceable in its receiving bore Shank of the chisel provided, the chisel one Valve arranged in the chisel holder for the supply of water actuated to the chisel or to the working face during the cut. Such from the chisel immediately when engaging in the Rock spraying leads to a substantial reduction of water consumption, with the problems of premature Chisel wear, especially with round shank chisels with a Hard material or carbide tip is not sufficient will be
- AT-B 389 738 is designed to reduce water requirements a chisel jetting and thus to reduce the risk of An intermittent softening of the sole in the area of the working face Loading the chisels of a cutting head with Coolant provided.
- the intermittent supply of pressurized water is here through a spool with slits perforations formed, which in the rotating Cutter head running channels are connected.
- Such one intermittent application of pressurized water to the nozzles in addition to reducing water consumption with a Sector control, such as in the DE 28 10 982 A1 is described. With such sector controls is over a predetermined center angle of rotation a cutting head the respective one in engagement Chisels fed pressurized water, the pressurized water in turn is applied via spray nozzles.
- the control element is included one connected to the pressurized water supply, only over a partial circumference extending control channel, which only over part of the rotation of a cutting roller the corresponding openings and thus the associated nozzles in Connection came.
- Such sector controls are common formed so that they over the central angular range Effect through which the chisels of the cutting roller or a cutting head is in engagement with the rock, this Central angle range is generally chosen to be less than 180 °, to reduce water consumption accordingly.
- For activation cooling was either the engagement of the chisel in the rock, or a control disc, which so was designed so that it only over a central angle of rotation of the cutting head or the cutting roller to effect through which the chisel engages with the rock stand.
- the invention now aims at a cooling device or To create spraying device of the type mentioned with which not only ensures that the cutting track is sufficient is cooled to cause inflammation during methane outgassing avoid, but also the wear of picks with hard material or hard metal inserts essential can be reduced.
- Training according to the invention based on the above Spraying device essentially in that the axes of the Nozzles inclined to the chisel tip and in the cutting track and that the sector control is set to the nozzles over an angular range of at least 45 °, preferably 65 ° - 85 ° of the rotation of the cutting head or the cutting roller after the chisel emerges from the rock with pressurized water applied.
- Such a critical temperature is usually not when a chisel emerges reached from a first cutting track.
- the critical Temperature can easily be exceeded, causing it premature and rapid wear occurs.
- the cooling is maintained over a partial area in which the chisel tips are at their highest temperature, succeeds with pressurized water due to the prevailing high Temperature difference a faster cooling to a lower Ensure temperature level, which when new entry of the chisel into the rock at the subsequent cutting track same chisel ensures that the critical temperature is not reached.
- the nozzles are advantageously used within the scope of the invention Spraying device designed as swirl nozzles.
- Spraying device designed as swirl nozzles.
- Swirl nozzles increase the certainty that cooling water actually is brought up to the chisel tip and at the same time with Security also captures the hottest part of the cutting track.
- the invention is advantageous The method is therefore carried out so that the nozzles are under one acute angle inclined to the axis of rotation of the picks and pressurized water with a pressure> 50 bar until the chisels are above a central angle of moved at least 45 °, preferably 65 ° - 85 ° out of the rock were, with preferably the water supply intermittent or pulsating.
- the wear of the hard metal or hard material inserts can be significantly reduced by keeping the peak temperature of the hard metal or hard material inserts of the round shank chisels below a critical temperature.
- the selected cutting speed also has a significant influence on the temperature level of the chisel tip. According to the invention, the procedure is therefore advantageously such that the cutting speed is reduced when the peak temperature approaches critical temperatures.
- the pronounced relationship between the tip temperature of the chisel and the cutting speed makes it seem particularly advantageous to lower the cutting speed compared to the conventional mode of operation. It is advantageously carried out in such a way that the cutting speed of the chisel is selected between 0.8 and 1.6 ms -1 .
- the process of the invention minimizes Water use at the same time ensures that the desired one Cutting track nozzle eliminates the risk of ignition that a substantial dust precipitation is enabled, and cooling
- the chisel is made in such a way that critical temperatures cannot be achieved. If the chisels just outside of the procedure would be cooled quickly, wear and tear can be reduced. Because, however, none Cutting track spraying would be guaranteed, the use would be in methane outgassing rock not safe.
- FIG. 1 shows a schematic Side view
- Fig. 2 is an enlarged view of a Chisel holder for a round chisel for training after Fig. 1.
- the cutting machine 1 shows a partial cutting machine 1, which is movable on a crawler track 2 on the brine 3.
- the cutting machine has a 4 indicated schematically Loading device and a cutter arm 5, which around an essentially vertical axis 6 in the sense of the double arrow 7 is pivotable in the horizontal direction, and by one essentially horizontal axis 8 in the direction of the double arrow 9 is pivoted in the vertical direction.
- the Swivel drive in the vertical direction is shown schematically by a hydraulic cylinder piston unit 10 indicated. At the rear end the machine is indicated a discharge device.
- the cutter arm 5 carries the cutter heads 11, which in the direction of Arrow 12 are driven in rotation.
- a sector control is now arranged and designed that the spraying of the chisel, as shown in Fig. 2 is explained in more detail, also about the central angle ⁇ of at least 45 ° and preferably 65 ° - 85 ° after the chisel emerges the face 14 is guaranteed.
- the Spraying for example, extends over the central angle ⁇ , the spraying only after a first partial path of the chisel 13 in the face 14 is turned on.
- the area of intervention the chisel 13 in the face 14 is through the central angle ⁇ illustrates which is usually a maximum of 180 ° is.
- a round shank chisel 13 can be seen, which in a bit holder 15 about its axis 16 is rotatably fixed.
- the chisel shaft 17 is in one Bush 18 added to replace defective chisels facilitate.
- nozzles 19 are arranged, which pressurized water is supplied via channels 20 from a sector controller.
- the Nozzles 19 have filter cartridges 21 in order to block the Prevent nozzles and are designed as swirl nozzles.
- the Nozzle axes 22 are at an acute angle to the axis of rotation 16 of the Picks 13 inclined towards the face 14, so that it is ensured that spray water, which the swirl nozzles leaves, actually in the cutting track and up to the top of the Chisel 23, which is designed as a hard material insert, arrives.
- the chisels 13 in the training according to Figure 2 are in the sense of Arrow 12 moves into the working face, the angular ranges, via which the sector control ensure active spraying, are shown in Fig. 1.
- the wear of the chisel tips 23 can be selected accordingly Cutting speeds in the range between 0.8 and Lower 1.6 m / s as much as by choosing an appropriate one Cooling water pressure between 60 and 120 bar.
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)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
Claims (9)
- Bedüsungseinrichtung für Meißel (13) einer Schrämeinrichtung, bei welcher die Meißel als Rundschaftmeißel (13) mit einem Hartmaterial- bzw. Hartmetalleinsatz ausgebildet sind und die Düsen (19) in Richtung der Schnittspur orientiert sind, wobei die Wasserzufuhr über eine Sektorsteuerung über einen Teil der Umdrehung der Schrämköpfe (11) oder Schrämwalzen erfolgt, dadurch gekennzeichnet, daß die Achsen (22) der Düsen (19) zur Meißelspitze (23) und in die Schneidspur geneigt angeordnet sind und daß die Sektorsteuerung so eingestellt ist, daß sie die Düsen (19) über einen Winkelbereich von wenigstens 45°, vorzugsweise 65° - 85° der Umdrehung des Schrämkopfes (11) bzw. der Schrämwalze nach dem Austritt der Meißel (13) aus dem Gestein mit Druckwasser beaufschlagt sind.
- Bedüsungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Düsen (19) als Dralldüsen ausgebildet sind.
- Verfahren zum Bedüsen der Rundschaftmeißel (13) einer Schrämeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Düsen (19) unter einem spitzen Winkel zur Drehachse (16) der Rundschaftmeißel (13) geneigt angeordnet werden und mit Druckwasser mit einem Druck von über 50 bar beaufschlagt werden bis die Meißel (13) über einem Zentriwinkel von wenigstens 45°, vorzugsweise 65° - 85° aus dem Gestein herausbewegt wurden.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Wasserzufuhr intermittierend bzw. pulsierend vorgenommen wird.
- Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß der Wasserdruck zwischen 60 und 120 bar gewählt wird.
- Verfahren nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die Spitzentemperatur der Hartmetall- bzw. Hartmaterialeinsätze der Rundschaftmeißel (13) kleiner als eine kritische Temperatur, welche vom Hartmaterial abhängt, gehalten wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß bei Annäherung der Spitzentemperatur an kritische Temperaturen die Schnittgeschwindigkeit reduziert wird.
- Verfahren nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, daß die Schnittgeschwindigkeit der Meißel (13) zwischen 0,8 und 1,6 ms-1 gewählt wird.
- Verfahren nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, daß die Bedüsung nach dem Eintritt des Meißels (13) in das Gestein begonnen wird.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99908666T ATE268431T1 (de) | 1998-03-17 | 1999-03-16 | Bedüsungseinrichtung für meissel sowie verfahren zum bedüsen der rundschaftmeissel einer schrämeinrichtung |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT46998 | 1998-03-17 | ||
AT46998 | 1998-03-17 | ||
PCT/AT1999/000067 WO1999047791A1 (de) | 1998-03-17 | 1999-03-16 | Bedüsungseinrichtung für meissel sowie verfahren zum bedüsen der rundschaftmeissel einer schrämeinrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0990088A1 EP0990088A1 (de) | 2000-04-05 |
EP0990088B1 true EP0990088B1 (de) | 2004-06-02 |
Family
ID=3491449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99908666A Expired - Lifetime EP0990088B1 (de) | 1998-03-17 | 1999-03-16 | Bedüsungseinrichtung für meissel sowie verfahren zum bedüsen der rundschaftmeissel einer schrämeinrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0990088B1 (de) |
AU (1) | AU2818499A (de) |
DE (1) | DE59909637D1 (de) |
WO (1) | WO1999047791A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107165646B (zh) * | 2017-05-25 | 2023-06-30 | 中国铁建重工集团股份有限公司 | 一种破岩刀具、盾构机刀盘及盾构机 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2810982A1 (de) | 1978-03-14 | 1979-09-27 | Gewerk Eisenhuette Westfalia | Beduesungseinrichtung fuer innenbedueste schraemwalzen |
AT358509B (de) * | 1978-10-10 | 1980-09-10 | Voest Ag | Einrichtung zum kuehlen der meissel von schraem- koepfen und der ortsbrust |
GB2088441B (en) * | 1980-11-24 | 1985-04-11 | Padley & Venables Ltd | Mineral mining pick and holder assembly |
GB2114627B (en) * | 1982-02-09 | 1985-05-01 | Padley And Venables Limited | Mineral mining apparatus provided with dust suppressing means |
AT375149B (de) | 1982-07-06 | 1984-07-10 | Voest Alpine Ag | Mit einer spruehvorrichtung ausgestatteter meisselhalter |
DE3332257C1 (de) * | 1983-09-07 | 1984-10-31 | Friedrich Wilhelm 4230 Wesel Paurat | Anordnung zum Schneiden von Gestein in bergbaulichen Untertagebetrieben |
DE3443289C1 (de) * | 1984-11-28 | 1993-02-11 | Friedrich Wilhelm Paurat | Verfahren zur Verminderung der Zuendung von Grubengas beim Arbeiten einer Teilschnitt-Streckenvortiebsmaschine |
GB8509143D0 (en) * | 1985-04-10 | 1985-05-15 | Anderson Strathclyde Plc | Mineral cutting picks |
GB8527710D0 (en) * | 1985-11-09 | 1985-12-11 | Minnovation Ltd | Mineral cutter pick |
AT389738B (de) | 1988-04-28 | 1990-01-25 | Voest Alpine Ag | Vorrichtung zum intermittierenden bespruehen von meisseln eines schraemkopfes |
DE4104277A1 (de) * | 1991-01-23 | 1992-08-13 | Komotzki Michael Fa | Meissel mit beduesung |
GB9210020D0 (en) * | 1992-05-09 | 1992-06-24 | Senior Control Eng Ltd | Pick box etc.for a mineral cutter pick |
DE4230678A1 (de) * | 1992-09-14 | 1994-03-17 | Krummenauer Gmbh & Co Kg | Meißelhalter für eine Schrämwalze oder einen Schneidkopf |
-
1999
- 1999-03-16 AU AU28184/99A patent/AU2818499A/en not_active Abandoned
- 1999-03-16 WO PCT/AT1999/000067 patent/WO1999047791A1/de active IP Right Grant
- 1999-03-16 DE DE59909637T patent/DE59909637D1/de not_active Expired - Lifetime
- 1999-03-16 EP EP99908666A patent/EP0990088B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1999047791A1 (de) | 1999-09-23 |
AU2818499A (en) | 1999-10-11 |
EP0990088A1 (de) | 2000-04-05 |
DE59909637D1 (de) | 2004-07-08 |
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