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 PDFInfo
- 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
Links
- 238000005507 spraying Methods 0.000 title claims description 5
- 239000012809 cooling fluid Substances 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000002826 coolant Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000009172 bursting Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Images
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)
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)
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)
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 |
-
1986
- 1986-07-17 AT AT0195886A patent/AT385815B/de not_active IP Right Cessation
-
1987
- 1987-07-13 PL PL1987266800A patent/PL266800A1/xx unknown
- 1987-07-17 EP EP87890176A patent/EP0253802A1/fr not_active Ceased
Patent Citations (8)
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)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE FR GB SE |
|
17P | Request for examination filed |
Effective date: 19880615 |
|
17Q | First examination report despatched |
Effective date: 19890710 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19900127 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHOEFFMANN, FRANZ, DIPL.-ING. Inventor name: WRULICH, HERWIG, ING. |