EP0188188B1 - Einrichtung zum Versprühen von Kühlflüssigkeit aus Düsen eines Schrämkopfes - Google Patents

Einrichtung zum Versprühen von Kühlflüssigkeit aus Düsen eines Schrämkopfes Download PDF

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Publication number
EP0188188B1
EP0188188B1 EP85890310A EP85890310A EP0188188B1 EP 0188188 B1 EP0188188 B1 EP 0188188B1 EP 85890310 A EP85890310 A EP 85890310A EP 85890310 A EP85890310 A EP 85890310A EP 0188188 B1 EP0188188 B1 EP 0188188B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
pressure
coolant
sensor
feed line
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
Application number
EP85890310A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0188188A1 (de
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/de
Application granted granted Critical
Publication of EP0188188B1 publication Critical patent/EP0188188B1/de
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 spraying device of 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 inside the cutting head to the nozzles, in particular with the interposition of valves actuated by the chisel and / or a sector control, can be fed.
  • a sector control or when applying a cooling liquid to the nozzles depending on the load on the chisel it is not readily apparent to the machine operator whether the nozzle assigned to a chisel is to be used over the period over which the chisel is in engagement with the one to be dismantled Rock stands, actually spraying liquid on the working face.
  • a prewarning device for indicating the commissioning of a machine with a water spray nozzle in which a temperature-dependent resistor is arranged on the water spray nozzle and is connected to a control circuit via which the machine can be started up is.
  • 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 has been reached, it must be concluded that the nozzle is largely blocked. 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 inserted in a sealing manner in the bore for receiving the nozzle, with which the nozzle carries Component-connected insert part is arranged, the jacket 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 fluid pressure is reached, resulting overall in an insert component which integrates a throttle and bursting element.
  • Such a cap can be easily 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 that controls 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 is intended to ensure a certain pressure ratio between the supply pressure of the cooling liquid 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 held in its position in a bore 13 for receiving the nozzle by a securing element 12.
  • 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 P1 for the cooling liquid.
  • the throttle bore 17 is set to a certain pressure ratio between the supply pressure P1 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 cooling liquid consumed, and at the latest when a certain number of caps 15 have burst, the amount of cooling liquid consumed becomes so large that a marked drop in pressure of the pressure P1 is observed in the feed line.
  • the cutter motor can subsequently be put out of operation via 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 blocked.
  • a pressure sensor 21 is now provided, the signal line of which is designated by 22.
  • the pressure P2 will increase when an increasing blockage is observed and in this case too the nozzle can be arranged in a bursting element which, after reaching a predetermined proportion of the pressure P1 in the space in front of the nozzle, causes the element to burst Consequence.
  • 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 Einrichtung zum Versprühen von Kühlflüssigkeit aus Düsen eines Schrämkopfes Expired EP0188188B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=3558701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890310A Expired EP0188188B1 (de) 1984-12-19 1985-12-13 Einrichtung zum Versprühen von Kühlflüssigkeit aus Düsen eines Schrämkopfes

Country Status (13)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138874A1 (de) * 1990-11-29 1992-06-11 Hydra Tools Int Plc Wasserspruehdose und damit ausgeruesteter schraem-meisselkasten

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385815B (de) * 1986-07-17 1988-05-25 Voest Alpine Ag Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes
AT385320B (de) * 1986-07-17 1988-03-25 Voest Alpine Ag Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes
EP0259620A1 (en) * 1986-09-09 1988-03-16 Kennametal Inc. Cutter bit having hard tip with middle section defined by concave surface of revolution
AT386252B (de) * 1986-10-29 1988-07-25 Voest Alpine Ag Meisselanordnung fuer einen rundschaftmeissel
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
AT505031B1 (de) * 2006-12-13 2008-10-15 Sandvik Mining & Constr Oy Verfahren zum erkennen von verstopfungen von bedüsungseinrichtungen sowie vorrichtung zur durchführung dieses verfahrens

Family Cites Families (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
GB1586036A (en) * 1978-04-12 1981-03-11 Dresser Europe Sa Pre-start warning device for a machine
GB2079351B (en) * 1980-06-24 1984-01-25 Dowty Meco Ltd Mining apparatus
GB2098645B (en) * 1981-05-15 1984-12-19 Pitcraft Summit Ltd Mining machine
GB2104945A (en) * 1981-09-04 1983-03-16 Green And Bingham Limited Dusting suppressing mineral mining cutter head
GB2138053B (en) * 1983-04-08 1987-09-03 Santrade Ltd Device for supplying fluid to a tool for breaking hard material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138874A1 (de) * 1990-11-29 1992-06-11 Hydra Tools Int Plc Wasserspruehdose und damit ausgeruesteter schraem-meisselkasten

Also Published As

Publication number Publication date
AU5088585A (en) 1986-06-26
IN162350B (xx) 1988-05-07
JPS61151394A (ja) 1986-07-10
ATA403084A (de) 1986-05-15
NZ214455A (en) 1987-08-31
EP0188188A1 (de) 1986-07-23
YU193785A (en) 1987-10-31
HUT41870A (en) 1987-05-28
MA20599A1 (fr) 1986-07-01
ES549211A0 (es) 1986-10-01
DE3565150D1 (en) 1988-10-27
HU194360B (en) 1988-01-28
PL256285A1 (en) 1986-09-23
ZA859335B (en) 1986-08-27
AT381985B (de) 1986-12-29
ES8700382A1 (es) 1986-10-01

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