EP0253802A1 - Dispositif de pulvérisation pour fluide de refroidissement venant de buses d'une tête de havage - Google Patents

Dispositif de pulvérisation pour fluide de refroidissement venant de buses d'une tête de havage Download PDF

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Publication number
EP0253802A1
EP0253802A1 EP87890176A EP87890176A EP0253802A1 EP 0253802 A1 EP0253802 A1 EP 0253802A1 EP 87890176 A EP87890176 A EP 87890176A EP 87890176 A EP87890176 A EP 87890176A EP 0253802 A1 EP0253802 A1 EP 0253802A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
cap part
nozzle carrier
spring
annular 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.)
Ceased
Application number
EP87890176A
Other languages
German (de)
English (en)
Inventor
Franz Dipl.-Ing. Schöffmann
Herwig Ing. Wrulich
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 EP0253802A1 publication Critical patent/EP0253802A1/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • 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 spray device for 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 interposition of valves actuated by the chisel and / or a sector controller can be fed.
  • EP-B1-40334 describes a water nozzle for dust control during cutting work, the nozzle being designed in such a way that if the nozzle becomes blocked during operation by solid particles carried along with it on the water inlet side, when the water flow is switched off, the solid particles snap back of a spring-loaded piston are pressed back into the storage space, so that the nozzle self-cleaning effect occurs on the water inlet side.
  • GB-PS 1 473 267 describes a water supply nozzle for cutting machines, through which water is only led when the machine is doing cutting work.
  • GB-PS 2 050 469 describes the structure and assembly method for easily replaceable spray nozzles that can be adjusted to the cutting knife.
  • EP-PS 67145 shows and describes a device for cooling the chisel of a cutting machine, in which the chisel opens a shut-off valve by moving in the direction of the cutting pressure via a coupling element, which valve is pressed into its closed position by the force of a spring and the water pressure, the chisel only opens the valve after the restoring force exerted by the spring and the water pressure has been overcome.
  • a device for cooling the chisel of a cutting machine has become known, in which the restoring force essentially corresponds to the water pressure upstream of the valve plug multiplied by the effective area of the valve plug acted upon by the water pressure in the closing direction.
  • DE-OS 30 07 055 shows a spray nozzle for a mining machine, wherein a shut-off body of a valve is coupled to a button extension which protrudes from the spray nozzle and presses the shut-off body sealingly against the valve seat by the mineral pressure to interrupt the coolant.
  • a chisel has become known, in the inside of the chisel cooling liquid is guided via a channel to openings in the area of the chisel tip and the supply of liquid only after a valve body displaceably guided against the water pressure by the displacement movement of the chisel The chisel enters the rock.
  • the invention now aims to provide a nozzle for a spray device of the type mentioned in the introduction, in which the repair work after a blockage of the nozzles is considerably simplified and defective nozzles can be recognized easily and without dismantling.
  • the invention consists essentially in the fact that the nozzles are arranged in a tubular nozzle carrier, which is arranged in a tubular housing while leaving free axial channels or an annular space, that the tubular nozzle carrier carries an annular cap part on its outer circumference, which is arranged between the nozzle carrier and the housing, that the axial channels or the annular space are (is) connected to the liquid supply line via a pressure relief valve and that the cap part is relative to the nozzle carrier via the end carrying the nozzle with the release of a Exit cross section is displaceable from the axial channels or the annular space.
  • a pressure increase due to a blockage of the nozzle leads to the ring-shaped cap being lifted or ejected by the increasing pressure of the pressure medium, with an enlarged outlet cross-section and thus a further safety operation being ensured at the same time.
  • the outlet cross section remains defined even after the ring-shaped cap has been lifted off or moved, so that the coolant consumption resulting in this case can be limited.
  • the caps can be designed in a simple manner as plastic parts and a missing cap can be easily recognized without dismantling the entire nozzle, so that the repair can be carried out quickly and safely.
  • the nozzle itself is not affected in any way when a cap is lifted off and after the blockage has been removed, for example by cleaning the nozzle, it is sufficient to replace the cap which has been lifted off or ejected in order to again produce the most favorable operating conditions.
  • the design according to the invention is such that the nozzle carrier carries a spring plate at a distance from the nozzle for a spring accommodated in the annular space between the nozzle carrier and the housing, the other end of which is supported on the annular cap part.
  • the design is advantageously made such that the spring engages a tubular extension of the cap part with the interposition of a spring plate with an inner diameter smaller than the outer diameter of the nozzle holder and / or smaller outer diameter compared to the inner diameter.
  • the nozzle carrier itself can have the pressure relief valve.
  • the design is such that the nozzle carrier has a, in particular conical, valve seat in front of the spring plate carried by the nozzle carrier and that the associated seat surfaces open into the supply line.
  • Such a design allows the pressure relief valve to be integrated into the nozzle itself and represents a structurally particularly favorable solution.
  • the design is such that the housing projects into the annular space and extends over the spring plate facing the cap part in the axial projection, in particular an annular rim, having.
  • the cap part in the operating position with its tubular extension engages over the projections of the housing projecting into the annular space in the axial direction with compression of the spring.
  • the ring-shaped cap part can be made in a simple manner from elastically deformable plastic, which can be made of colored material for even better recognition of defective nozzles, in which the cap has been lifted off.
  • the design is such that the annular cap part in the press fit between the housing and Nozzle carrier is arranged, wherein the effective displacement force on the cap-shaped part by the spring and / or the liquid pressure in the annular space after lifting the pressure relief valve is greater than the force components of the press fit counteracting these forces. If the pressure relief valve has not responded and the pressure has not yet risen excessively, such a press fit can hold the spring under pretension and thus ensure a spring relaxation path after the cap has been pushed out. With such a configuration, a throttle is advantageously switched into the liquid supply line between the pressure fluid source and the pressure relief valve, which results in defined pressure differences and the setting of the response pressure of the overload valve is considerably simplified.
  • FIG. 1 shows a chisel holder with controlled coolant supply to the nozzles depending on the load on the chisel
  • FIG. 2 shows a nozzle according to the invention in its operating state
  • FIG. 3 shows the nozzle according to FIG. 2 after the cap has been lifted off
  • FIG Training with integrated throttle is explained in more detail below with reference to exemplary embodiments shown in the drawing.
  • the coolant supply line is indicated schematically by 1.
  • a flow meter 2 can be switched on, the signals of which can be made available to an evaluation circuit 3 and subsequently to a cutting motor 4 as control signals.
  • Such a flow rate measuring device and an associated evaluation circuit are by no means an unconditional requirement for the operation of the device according to the invention.
  • 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 nozzle body corresponding to FIG. 2 is now inserted into this bore 13, which comprises a nozzle carrier 14, a tubular housing 15 and a cap part 16.
  • the nozzle carrier 14 carries the outlet nozzles 17 for the coolant, the coolant supply in turn being designated 1 in FIG.
  • a throttle 18 is switched on, which causes the pressure to drop to a pressure P2 downstream of the throttle when the nozzle 17 is free due to the flowing medium.
  • a switching valve 19 for controlling the supply of coolant is also indicated schematically in FIG.
  • An annular space 20 is formed between the housing 15 and the nozzle carrier 14, in which a spring 21 is received.
  • the spring 21 is supported on a spring plate 22 of the nozzle carrier 14 formed by an annular extension and engages via a disc-shaped spring plate 22 on a tubular extension 23 of the cap part 16.
  • the pressure P2 downstream of the throttle 18 is identical to the pressure P3 upstream of the outlet nozzle 17 of the nozzle carrier 14.
  • the pressure P1 upstream of the throttle is greater than the pressure P2 downstream of the throttle 18
  • the end of the nozzle carrier 14 facing away from the nozzle 17 has a conical valve cone 24, which rests against a seat surface 25 in the normal operating position.
  • the tubular extension 23 of the cap part 16 engages over extensions 26 of the housing, which protrude into the interior of the annular space 20, and in this way holds the spring 21 under prestress.
  • the system pressure P1 in this state is equal to the flow pressure P2 after the throttle cross section and, depending on the setting of the spring force of the spring 21, there is a discontinuous or continuous escape of liquid, which in any case provides the necessary cooling even after blockage the nozzle 17 is ensured.
  • the throttle 18 is integrated in the housing 15 of the nozzle and lies in front of the valve seat 25 of the pressure relief valve, the valve body of which is again designated by 24.
  • the spring relief path resulting from the pushing out of the cap part 16 is indicated by a.
  • the spring 21 can relax after pushing out the cap part 16 via this spring relief path a, so that subsequently the opening pressure of the overload or safety valve 24, 25 by reducing the Lowered spring preload.
  • the cutting track is then cooled by the annulus with increased fluid throughput.
  • Defective nozzles can be easily identified without the bursting cap and without disassembling the nozzle body.
  • the repair consists essentially in the cleaning of the nozzle 17 and in the renewed pushing on of a new cap part which is pushed onto the outer circumference of the nozzle carrier 14 under prestress of the spring 21.
  • the press fit must be selected so that the forces directed against the force of the spring 21 are lower than the forces acting on the cap part 16 in the push-off direction after the safety valve 24, 25 has been opened.

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)
EP87890176A 1986-07-17 1987-07-17 Dispositif de pulvérisation pour fluide de refroidissement venant de buses d'une tête de havage Ceased EP0253802A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1958/86 1986-07-17
AT0195886A AT385815B (de) 1986-07-17 1986-07-17 Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes

Publications (1)

Publication Number Publication Date
EP0253802A1 true EP0253802A1 (fr) 1988-01-20

Family

ID=3524725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87890176A Ceased EP0253802A1 (fr) 1986-07-17 1987-07-17 Dispositif de pulvérisation pour fluide de refroidissement venant de buses d'une tête de havage

Country Status (3)

Country Link
EP (1) EP0253802A1 (fr)
AT (1) AT385815B (fr)
PL (1) PL266800A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246588A (en) * 1990-08-03 1992-02-05 Tool & Steel Products Limited Nozzle arrangement for a mineral cutter pick box
DE19535795A1 (de) * 1995-09-26 1997-03-27 Voest Alpine Bergtechnik Prüfeinrichtung für die Funktion von Düsen einer meißelgesteuerten Schneidspurbedüsung
CN101476465B (zh) * 2009-01-09 2011-04-13 山东卡特重工有限公司 一种可内喷雾的掘进机

Citations (8)

* 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
GB2050469A (en) * 1979-04-05 1981-01-07 Rich Services Inc Roy Mineral-mining Cutter Drum
DE3007055A1 (de) * 1980-02-26 1981-09-17 Krampe & Co Fertigung in Bergbaubedarf GmbH, Zweigniederlassung Pelkum, 4700 Hamm Spruehduese fuer eine bergwerksmaennische gewinnungsmaschine
EP0040334A2 (fr) * 1980-05-20 1981-11-25 Bergwerksverband GmbH Buse d'eau avec dispositif d'autonettoyage
EP0067145A1 (fr) * 1981-06-04 1982-12-15 VOEST-ALPINE Aktiengesellschaft Dispositif de refroidissement pour les outils d'une haveuse
EP0067144A1 (fr) * 1981-06-04 1982-12-15 VOEST-ALPINE Aktiengesellschaft Dispositif de refroidissement pour les outils d'une haveuse
GB2135715A (en) * 1983-03-02 1984-09-05 Padley & Venables Ltd Water sprayed, mineral mining pick assembly
AT381985B (de) * 1984-12-19 1986-12-29 Voest Alpine Ag Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes

Patent Citations (8)

* 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
GB2050469A (en) * 1979-04-05 1981-01-07 Rich Services Inc Roy Mineral-mining Cutter Drum
DE3007055A1 (de) * 1980-02-26 1981-09-17 Krampe & Co Fertigung in Bergbaubedarf GmbH, Zweigniederlassung Pelkum, 4700 Hamm Spruehduese fuer eine bergwerksmaennische gewinnungsmaschine
EP0040334A2 (fr) * 1980-05-20 1981-11-25 Bergwerksverband GmbH Buse d'eau avec dispositif d'autonettoyage
EP0067145A1 (fr) * 1981-06-04 1982-12-15 VOEST-ALPINE Aktiengesellschaft Dispositif de refroidissement pour les outils d'une haveuse
EP0067144A1 (fr) * 1981-06-04 1982-12-15 VOEST-ALPINE Aktiengesellschaft Dispositif de refroidissement pour les outils d'une haveuse
GB2135715A (en) * 1983-03-02 1984-09-05 Padley & Venables Ltd Water sprayed, mineral mining pick assembly
AT381985B (de) * 1984-12-19 1986-12-29 Voest Alpine Ag Sprueheinrichtung fuer kuehlfluessigkeit aus duesen eines schraemkopfes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246588A (en) * 1990-08-03 1992-02-05 Tool & Steel Products Limited Nozzle arrangement for a mineral cutter pick box
GB2246588B (en) * 1990-08-03 1994-08-31 Tool & Steel Products Limited Nozzle arrangements for mineral cutter pick boxes
DE19535795A1 (de) * 1995-09-26 1997-03-27 Voest Alpine Bergtechnik Prüfeinrichtung für die Funktion von Düsen einer meißelgesteuerten Schneidspurbedüsung
CN101476465B (zh) * 2009-01-09 2011-04-13 山东卡特重工有限公司 一种可内喷雾的掘进机

Also Published As

Publication number Publication date
ATA195886A (de) 1987-10-15
PL266800A1 (en) 1988-07-21
AT385815B (de) 1988-05-25

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Inventor name: WRULICH, HERWIG, ING.