EP0188188A1 - Dispositif pour faire jaillir un liquide refroidissant par des buses d'une tête abatteuse - Google Patents

Dispositif pour faire jaillir un liquide refroidissant par des buses d'une tête abatteuse Download PDF

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Publication number
EP0188188A1
EP0188188A1 EP85890310A EP85890310A EP0188188A1 EP 0188188 A1 EP0188188 A1 EP 0188188A1 EP 85890310 A EP85890310 A EP 85890310A EP 85890310 A EP85890310 A EP 85890310A EP 0188188 A1 EP0188188 A1 EP 0188188A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
pressure
throttle
coolant
space
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
EP85890310A
Other languages
German (de)
English (en)
Other versions
EP0188188B1 (fr
Inventor
Herwig Wrulich
Alfred Zitz
Gottfried Siebenhofer
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.)
Voestalpine AG
Original Assignee
Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0188188A1 publication Critical patent/EP0188188A1/fr
Application granted granted Critical
Publication of EP0188188B1 publication Critical patent/EP0188188B1/fr
Expired 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
    • 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 device for spraying cooling liquid from nozzles of a cutting head, which is equipped with chisels and is rotatably mounted on a cutting arm, in which the cooling liquid via channels in the interior of the cutting head to the nozzles, in particular with the intermediary of through the chisel actuated valves and / or a sector control, can be fed.
  • a sector control or when using a load of cooling liquid dependent on the load on the chisel it is not readily apparent to the machine operator whether the nozzle assigned to a chisel over the period of time over which the chisel is in engagement with the rock to be mined, actually sprayed liquid on the working face.
  • the invention now aims to detect nozzle clogging in good time.
  • the invention consists essentially in that the space in front of the nozzle is connected to the coolant supply line via a throttle, that the nozzle is arranged in a component delimiting the space in the flow direction behind the throttle, and that at least one sensor is provided in the coolant supply line Detection of the flow rate and / or the pressure and / or the pressure difference between the coolant supply line or the room before the throttle and the space downstream of the throttle is switched on. Because the space in front of the nozzle is separated from the coolant supply line by a throttle, the pressure difference of the space in front of the throttle relative to the space after the throttle can be used directly as an indication of whether a nozzle is blocked or not.
  • the pressure in the space downstream of the throttle will naturally increase when a blockage occurs relative to the pressure in front of the throttle, and when a predetermined sufficiently small pressure difference is reached, extensive blockage of the nozzle must be concluded. If the nozzle is completely blocked, the pressure after the throttle becomes equal to the pressure before the throttle.
  • the throttle simultaneously equalizes the water consumption, so that flow meters or pressure gauges in the feed line also provide information about the degree of nozzle clogging.
  • the design can be such that the throttle is arranged in an insert part sealingly inserted into the bore for receiving the nozzle and connected to the component carrying the nozzle, the casing of which has a recess for the engagement of a releasable locking member.
  • the component carrying the nozzle as a cap which bursts or springs off in the feed line before the full cooling liquid pressure is reached, resulting overall in an insert component which integrates a throttle and bursting element.
  • a cap can be non-positively connected to the insert part for fixing the nozzle in the bore for receiving the nozzle, this insert part having a throttle bore.
  • the throttle in a valve controlling the supply of coolant, such an arrangement being able to be advantageously implemented, for example, if a design is selected in which the supply of coolant is dependent on the axial bit load or axial bit displacement is controlled.
  • the throttle bore should have a certain pressure ratio between ensure the supply pressure of the coolant and the pressure upstream of the nozzle when the nozzle is intact and not clogged.
  • the insert and / or the coolant supply line is advantageously equipped with filters.
  • the signals from the sensors for the detection of pressure differences, the pressure in the supply line and / or the flow rate can be connected to a signal device and / or a switching device for the drive motor of the cutting head.
  • FIG. 1 shows a chisel holder with coolant supply to nozzles controlled as a function of the load on the chisel
  • FIG. 2 shows a nozzle for use in an embodiment according to FIG. 1
  • FIG. 3 shows a modified embodiment of the device according to the invention.
  • the coolant supply line is indicated schematically by 1.
  • a flow meter 2 is switched into the coolant supply line, the signals of which are made available to an evaluation circuit 3 and subsequently to a cutting motor 4 as control signals.
  • the cooling liquid Under a supply pressure P1, the cooling liquid reaches a valve, the valve body of which is designated by 5.
  • the valve body is displaced by axial displacement in the sense of the double arrow 6 of a chisel 7 as a function of the load on the chisel against the force of a spring 8, so that when the chisel is loaded, the liquid supply into the channels 9 and thus to a nozzle 10 is released.
  • the nozzle 10 is arranged in a nozzle body 11 which is secured by a securing element 12 in its Position is held in a bore 13 for receiving the nozzle.
  • a component corresponding to FIG. 2 is now inserted into this bore 13, which consists of an insert part 14 and a cap 15.
  • the cap 15 carries the nozzle 16.
  • the insert part 14 has a throttle bore 17.
  • a pressure P2 which, when the nozzle 16 is not clogged, is lower than the supply pressure Pl for the cooling liquid.
  • the throttle bore 17 is set to a certain pressure ratio between the supply pressure Pl and the pressure P2 upstream of the nozzle.
  • the cap 15 is now designed as a bursting element and is dimensioned such that it is then blown off or tears when P2 reaches 90% of P1, for example.
  • a bursting of the cap 15 leads to an increase in the amount of coolant consumed, and at the latest when a certain number of caps 15 have burst, the amount of coolant consumed becomes so large that a marked drop in pressure of the pressure P1 is observed in the supply line.
  • the cutter motor can be put out of operation by means of a pressure switch.
  • a display device can naturally be triggered.
  • the component carrying the throttle bore 17 also has seals 18, via which a tight insertion of this component into the bore 13 and, due to the recess 19 in the jacket of this component, locking by the locking member 12 in the illustration in FIG. 1 is possible.
  • the throttle bore is not provided in an insert, but rather directly in the valve.
  • the throttle bore is now designated 20, and after opening the valve body 5, a pressure P2 will set in the bore 13 for receiving the nozzle when the nozzle is not clogged.
  • a pressure sensor 21 is now provided, the signal line of which is designated by 22.
  • Filters 23 are included in the feed line.
  • a filter 24 is also connected to the component having the nozzle in order to prevent contamination by the coolant supply.

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)
  • Nozzles (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
EP85890310A 1984-12-19 1985-12-13 Dispositif pour faire jaillir un liquide refroidissant par des buses d'une tête abatteuse Expired EP0188188B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0403084A AT381985B (de) 1984-12-19 1984-12-19 Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes
AT4030/84 1984-12-19

Publications (2)

Publication Number Publication Date
EP0188188A1 true EP0188188A1 (fr) 1986-07-23
EP0188188B1 EP0188188B1 (fr) 1988-09-21

Family

ID=3558701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890310A Expired EP0188188B1 (fr) 1984-12-19 1985-12-13 Dispositif pour faire jaillir un liquide refroidissant par des buses d'une tête abatteuse

Country Status (13)

Country Link
EP (1) EP0188188B1 (fr)
JP (1) JPS61151394A (fr)
AT (1) AT381985B (fr)
AU (1) AU5088585A (fr)
DE (1) DE3565150D1 (fr)
ES (1) ES8700382A1 (fr)
HU (1) HU194360B (fr)
IN (1) IN162350B (fr)
MA (1) MA20599A1 (fr)
NZ (1) NZ214455A (fr)
PL (1) PL256285A1 (fr)
YU (1) YU193785A (fr)
ZA (1) ZA859335B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0259620A1 (fr) * 1986-09-09 1988-03-16 Kennametal Inc. Outil coupant ayant une pointe pénétrante à section centrale définie comme une surface concave de révolution
AT386252B (de) * 1986-10-29 1988-07-25 Voest Alpine Ag Meisselanordnung fuer einen rundschaftmeissel
WO2008070884A1 (fr) * 2006-12-13 2008-06-19 Sandvik Mining And Construction G.M.B.H. Procédé de détection de colmatages dans des dispositifs à tuyères et dispositif pour exécuter ce procédé

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385320B (de) * 1986-07-17 1988-03-25 Voest Alpine Ag Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes
AT385815B (de) * 1986-07-17 1988-05-25 Voest Alpine Ag Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes
GB9025934D0 (en) * 1990-11-29 1991-01-16 Hydra Tools Int Plc Mineral mining equipment etc
US5374111A (en) * 1993-04-26 1994-12-20 Kennametal Inc. Extraction undercut for flanged bits
JP4638717B2 (ja) * 2004-11-19 2011-02-23 三和機材株式会社 掘削作業ロッドの流体圧式作業具駆動装置における作業具最大進出確認装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1473267A (en) * 1975-12-06 1977-05-11 Hayden Nilos Conflow Ltd Mining machines
DE2915176A1 (de) * 1978-04-12 1979-10-25 Dresser Europe Sa Warnvorrichtung zum anzeigen der bevorstehenden inbetriebsetzung einer maschine
GB2079351A (en) * 1980-06-24 1982-01-20 Dowty Meco Ltd Mining apparatus
GB2098645A (en) * 1981-05-15 1982-11-24 Pitcraft Summit Ltd Mining machine
GB2104945A (en) * 1981-09-04 1983-03-16 Green And Bingham Limited Dusting suppressing mineral mining cutter head
GB2138053A (en) * 1983-04-08 1984-10-17 Santrade Ltd Device for supplying fluid to a tool for breaking hard material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1473267A (en) * 1975-12-06 1977-05-11 Hayden Nilos Conflow Ltd Mining machines
DE2915176A1 (de) * 1978-04-12 1979-10-25 Dresser Europe Sa Warnvorrichtung zum anzeigen der bevorstehenden inbetriebsetzung einer maschine
GB2079351A (en) * 1980-06-24 1982-01-20 Dowty Meco Ltd Mining apparatus
GB2098645A (en) * 1981-05-15 1982-11-24 Pitcraft Summit Ltd Mining machine
GB2104945A (en) * 1981-09-04 1983-03-16 Green And Bingham Limited Dusting suppressing mineral mining cutter head
GB2138053A (en) * 1983-04-08 1984-10-17 Santrade Ltd Device for supplying fluid to a tool for breaking hard material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0259620A1 (fr) * 1986-09-09 1988-03-16 Kennametal Inc. Outil coupant ayant une pointe pénétrante à section centrale définie comme une surface concave de révolution
AT386252B (de) * 1986-10-29 1988-07-25 Voest Alpine Ag Meisselanordnung fuer einen rundschaftmeissel
WO2008070884A1 (fr) * 2006-12-13 2008-06-19 Sandvik Mining And Construction G.M.B.H. Procédé de détection de colmatages dans des dispositifs à tuyères et dispositif pour exécuter ce procédé
CN101573508B (zh) * 2006-12-13 2012-08-08 桑德威克采矿和建筑有限责任公司 用于喷洒设备的监控方法及实施该方法的监控装置
AU2007332121B2 (en) * 2006-12-13 2014-01-23 Sandvik Mining And Construction G.M.B.H. Method for identifying blockages in sprinkler devices and apparatus for carrying out this method

Also Published As

Publication number Publication date
EP0188188B1 (fr) 1988-09-21
AT381985B (de) 1986-12-29
JPS61151394A (ja) 1986-07-10
AU5088585A (en) 1986-06-26
ES8700382A1 (es) 1986-10-01
IN162350B (fr) 1988-05-07
MA20599A1 (fr) 1986-07-01
ZA859335B (en) 1986-08-27
NZ214455A (en) 1987-08-31
HUT41870A (en) 1987-05-28
HU194360B (en) 1988-01-28
ES549211A0 (es) 1986-10-01
ATA403084A (de) 1986-05-15
DE3565150D1 (en) 1988-10-27
PL256285A1 (en) 1986-09-23
YU193785A (en) 1987-10-31

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