EP0185571A1 - Sector spraying device in coal mining - Google Patents

Sector spraying device in coal mining Download PDF

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Publication number
EP0185571A1
EP0185571A1 EP85402237A EP85402237A EP0185571A1 EP 0185571 A1 EP0185571 A1 EP 0185571A1 EP 85402237 A EP85402237 A EP 85402237A EP 85402237 A EP85402237 A EP 85402237A EP 0185571 A1 EP0185571 A1 EP 0185571A1
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EP
European Patent Office
Prior art keywords
drum
peaks
disc
cylindrical
channels
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Granted
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EP85402237A
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German (de)
French (fr)
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EP0185571B1 (en
Inventor
Jean-Joseph Demoulin
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Charbonnages de France CDF
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Charbonnages de France CDF
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Priority to AT85402237T priority Critical patent/ATE37070T1/en
Publication of EP0185571A1 publication Critical patent/EP0185571A1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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

Definitions

  • the subject of the invention is a sectoral sprinkler device which can be used for coal mining in order to reduce the production of dust and cool the tools in order to minimize the risk of explosion in gassy atmospheres.
  • Coal mining is carried out in particular using integral cutters, which are provided with one or more movable arms carrying a drum armed with picks and whose axis is perpendicular to the face.
  • the picks are placed on the one hand on the cylindrical surface of the drum, on the other hand on its flat face located on the side of the cutting face, which is often called rusting disc.
  • the peaks of the rusting disc permanently attack the massif, while only part of the peaks of the cylindrical surface is, at a given moment, in contact with the coal. Relative to the shearer, the position of these peaks corresponds to a cylindrical sector of the drum.
  • the lifting arm is likely to occupy either a high position (felling on the roof), or a low position (felling on the wall).
  • a high position (felling on the roof), or a low position (felling on the wall).
  • a cylindrical drum sector To each of these positions corresponds, for the peaks in contact with the coal at a given instant, a cylindrical drum sector, these two sectors generally overlapping in part.
  • the cutters often have two cutting arms, one of which, placed at the front of the machine, is in the high position, while the other, placed at the rear, is in the low position.
  • the position of the arms is reversed before changing its direction of movement
  • the main object of the invention is, therefore, to achieve a device for distributing sprinkling water mounted in the central part of a slaughter drum and comprising three supply circuits which provide permanent supply rust disk peaks and selective feeding of the peaks of two lateral cylindrical sectors as a function of the direction of horizontal movement of the drum.
  • a cutting drum having an end face provided with peaks, called a rusting disc, a cylindrical surface provided with peaks in which there are two opposite cylindrical sectors having two diametrically opposite parts and capable of having a common part, this drum also having an area central by which it is mounted on a fixed shaft which has at least one free end face, according to the invention, there are provided in the shaft and in the central zone of the drum three concentric pipes to the shaft and to the drum in which there is a first cylindrical inner pipe, a second annular intermediate pipe and a third annular outside pipe which are each connected by one of their ends to a water inlet comprising a stop valve; these pipes each individually lead either to channels leading to the peaks of the rusting disc, or to suitable annular sectoral chambers formed on the shaft, to which correspond channels which are distributed circumferentially on the drum and which are each joined, for example, by a hose at a corresponding peak
  • the first cylindrical inner pipe leads to the peaks of the rusting disc.
  • the second intermediate pipe is longer by its end end portion than the third external pipe and several radial channels join these pipes to the corresponding annular sectoral chambers which are located in transverse planes spaced in the axial direction.
  • these supply channels are connected by their outer ends to water inlet tubes; their inner ends are extended by internal passages up to the ends of the pipes.
  • FIG. 1 schematically shows a first cutting drum 1 and a second cutting drum 2 which equip a cutting machine moving horizontally from right to left, as indicated by an arrow F ,.
  • the first drum 1 is in the high position and the second drum 2 is in the low position.
  • the cutter moves in the opposite direction F, after tilting of the drums 1, 2 as indicated by arrows F "so that the first drum 1 moves to the low position and the second drum 2 moves to the high position.
  • FIG. 2 shows more clearly the change in the active sectors by which the coal is attacked, which results from a change in the high or low position of the drum 1 following its tilting along F ,, around a center 0.
  • the entire left cylindrical sector G of the lateral surface of the drum 1 is active over 180 °.
  • the right cylindrical sector D is active over 120 °. Due to tilting the two sectors G and D have a common part C indicated by tight hatching which is always active.
  • the sectoral sprinkler device of the invention provides this result. In addition, it ensures the permanent supply of water to the rusting disc peaks which attack the carbon in the two drum positions 1.
  • a cutting drum 1 being well known to those skilled in the art and, as it is not generally concerned with the invention, it will not be described in detail.
  • This drum 1 has a central part 2 which is rotatably mounted on a shaft 3 which is stationary in rotation (FIG. 5).
  • This tree 3 is hollow; it is dug with longitudinal holes with stepped diameters which contain three tubes 4,5,6 concentric with each other and concentric with the axis of the shaft 3, thus making appear a first cylindrical inner pipe 7, a second annular intermediate pipe 8 and a third annular external pipe 9, also concentric.
  • the first cylindrical interior pipe 7 is extended by a channel 7A up to a central connection piece 10 from which flexible hoses 10A leave which lead to the peaks of the rusty disc.
  • the second intermediate pipe 8 of the third external pipe 9 ends in end portions situated in transverse planes IV-IV and III-III respectively, spaced in axial direction from the shaft 3, in which radial channels 11 are formed, 12 respectively.
  • the radial channels 12 end, in the thickness of the shaft 3, in an annular sectoral chamber 13, contained in this plane III-III, hollowed out on the surface of the shaft 3, and developing over 180 °.
  • radial channels 14 are provided in the central part 2 of the drum 1; their number corresponds to that of the peaks of the lateral face of the drum 1 and they are regularly spaced in the circumferential direction. They are each extended in the drum 1 by longitudinal channels 15 and then by terminal radial channels 16 (FIG. 5) which lead to connection end pieces 17 from which flexible hoses 18. These last each extend respectively to peaks of the lateral surface of the drum.
  • the two annular sectoral chambers 13 and 19 are arranged, in circumferential direction, in correspondence with the active sectors G and D of the drum 1 (FIG. 1) and they overlap in accordance with the common part C.
  • the peaks which are joined to the radial channels 14 and 20 are supplied with water only when these channels pass, in rotation, opposite the sectoral chambers 13 and 19.
  • the latter are supplied with water by the third annular external pipe 9 or by the second annular intermediate pipe 8 according to the high or low position of the drum 1.
  • Das non-return valves 22, 23 are provided on the longitudinal channels 15, 21 (FIG. 5) to prevent the water sent by one circuit from flowing back through the other circuit
  • the concentric pipes 7, 8, 9 are supplied with water, continuously for the pipe 7, alternately for the pipes 8, 9 at the end of the shaft 3 remote from the rusting disc of the drum, preferably from the as will now be described with reference to FIGS. 6 and 7.
  • each pipe opens into a volume supply 24, 25, 26 respectively located in its extension.
  • These volumes 24, 25, 26 and the end parts of the tubes 4,5, 6 are located in a fixed part 27 ending in a disc 28 arranged in a plane transverse to the axis of the cutting drum.
  • This disc 28 has the thickness Just sufficient to allow the digging of radial supply channels 29,30,31,32. The latter are therefore spaced in circumferential direction; at their outer ends, they are connected to water inlet tubes 33, 34, 35, 36 respectively.
  • the radial supply channel 29 opens directly into the supply volume 26 of the first cylindrical inner pipe 7.
  • the radial supply channel 30 is connected by internal passages (a longitudinal passage 37 then a radial passage 38 hollowed out in the fixed part 27) to the supply volume 25 of the second intermediate annular pipe 8.
  • the two supply channels 31, 32 both terminate in the supply volume 24 of the third external annular pipe 9 via internal passages longitudinal 39 and radial 40.
  • the extent in the circumferential direction of the sectorial chambers 13: 1 9 is selected in correspondence with the active inventory cylindrical sectors G, D A cutting drum.
  • the extent of the active sector G in the high position of the drum is generally 180 °, although it may be desired to sprinkle over a greater extent capable of reaching approximately 210 °.
  • the angular extent of the active sector D in the lower position of the drum is variable depending on the height of the cutting face; it can be in practice between 60 and 180 °.

Abstract

Dans la partie centrale du tambour de havage, il existe des canalisations concentriques (7,8,9) raccordées à des arrivées d'eau et dans lesquelles la canalisation intérieure (7) est réunie en permanence aux pics du disque rouilleur du tambour cependant que les deux autres canalisations (8,9) aboutissent par des canaux radiaux (11,12) à des chambres sectorielles (13,19) dont l'étendue angulaire correspond à celle des secteurs actifs de la face latérale du tambour, selon la position haute ou basse de celui-ci.In the central part of the lifting drum, there are concentric pipes (7,8,9) connected to water inlets and in which the internal pipe (7) is permanently joined to the peaks of the rusting disc of the drum, however the two other pipes (8, 9) terminate by radial channels (11, 12) in sectoral chambers (13, 19) whose angular extent corresponds to that of the active sectors of the lateral face of the drum, according to the high position or low of it.

Description

L'invention a pour objet un dispositif d'arrosage sectoriel utilisable pour l'abattage du charbon en vue de réduire la production de poussières et de refroidir les outils afin de minimiser le risque d'explosion dans les atmosphères grisouteuses.The subject of the invention is a sectoral sprinkler device which can be used for coal mining in order to reduce the production of dust and cool the tools in order to minimize the risk of explosion in gassy atmospheres.

L'abattage du charbon se fait notamment à l'aide de haveuses intégrales, qui sont pourvues d'un ou plusieurs bras mobiles portant un tambour armé de pics et dont l'axe est perpendiculaire au front de taille. Les pics sont placés d'une part sur la surface cylindrique de tambour, d'autre part sur sa face plane située du côté du front de taille, qui est souvent appelée disque rouilleur. Pendant le havage, les pics du disque rouilleur attaquent en permanence le massif, tandis qu'une partie seulement des pics de la surface cylindrique est, à un instant donné, en contact avec le charbon. Par rapport à la haveuse, la position de ces pics correspond à un secteur cylindrique du tambour. En général, le bras de havage est susceptible d'occuper soit une position haute (abattage au toit), soit une position basse (abattage au mur). A chacune de ces positions correspond, pour les pics en contact avec le charbon à un instant donné, un secteur cylindrique de tambour, ces deux secteurs se recouvrant d'ailleurs généralement en partie.Coal mining is carried out in particular using integral cutters, which are provided with one or more movable arms carrying a drum armed with picks and whose axis is perpendicular to the face. The picks are placed on the one hand on the cylindrical surface of the drum, on the other hand on its flat face located on the side of the cutting face, which is often called rusting disc. During the cutting, the peaks of the rusting disc permanently attack the massif, while only part of the peaks of the cylindrical surface is, at a given moment, in contact with the coal. Relative to the shearer, the position of these peaks corresponds to a cylindrical sector of the drum. In general, the lifting arm is likely to occupy either a high position (felling on the roof), or a low position (felling on the wall). To each of these positions corresponds, for the peaks in contact with the coal at a given instant, a cylindrical drum sector, these two sectors generally overlapping in part.

Les haveuses comportent souvent deux bras de havage dont l'un, placé à l'avant de la machine, est en position haute, tandis que l'autre, placé à l'arrière, est en position basse. Lorsque la haveuse arrive en bout de taille, la position des bras est inversée avant que l'on change son sens de déplacementThe cutters often have two cutting arms, one of which, placed at the front of the machine, is in the high position, while the other, placed at the rear, is in the low position. When the cutter reaches the end of its size, the position of the arms is reversed before changing its direction of movement

Il est connu de projeter de l'eau sur le massif à abattre au voisinage de chaque pic. 11 existe des pics spécialement conçus à cet effet présentant à un endroit approprié une buse d'éjection d'eau.It is known to spray water on the massif to be felled in the vicinity of each peak. There are spikes specially designed for this purpose, presenting a water ejection nozzle at a suitable location.

Il est souhaitable de réduire au strict minimum nécessaire la consommation de l'eau utilisée et par conséquent, de n'alimenter à un instant donné que les pics qui sont en contact avec le charbon, c'est-à-dire d'une part les pics du disque rouilleur, d'autre part les pics du secteur cylindrique qui sont en contact avec le massif à cet instantIt is desirable to reduce the consumption of the water used to the strict minimum necessary and therefore, to supply at a given moment only the peaks which are in contact with the coal, that is to say on the one hand the peaks of the rusting disc, on the other hand the peaks of the cylindrical sector which are in contact with the solid mass at this instant

Le but principal de l'invention est, en conséquence, de parvenir à un dispositif distributeur d'eau d'arrosage se montant dans la partie centrale d'un tambour d'abattage et comprenant trois circuits d'alimentation qui assurent l'alimentation permanente des pics du disque rouilleur et l'alimentation sélective des pics de deux secteurs cylindriques latéraux en fonction du sens de déplacement horizontal du tambour.The main object of the invention is, therefore, to achieve a device for distributing sprinkling water mounted in the central part of a slaughter drum and comprising three supply circuits which provide permanent supply rust disk peaks and selective feeding of the peaks of two lateral cylindrical sectors as a function of the direction of horizontal movement of the drum.

Sur un tambour de havage ayant face extrême munie de pics, appelée disque rouilleur, une surface cylindrique munie de pics dans laquelle on distingue deux secteurs cylindriques opposés ayant deux parties diamétralement opposées et susceptibles d'avoir une partie commune, ce tambour ayant aussi une zone centrale par laquelle il est monté sur un arbre fixe qui présente au moins une face extrême libre, selon l'invention, il est prévu dans l'arbre et dans la zone centrale du tambour trois canalisations concemtriques à l'arbre et au tambour dans lesquelles il existe une première canalisation intérieure cylindrique, une deuxième canalisation intermédiaire annulaire et une troisième canalisation extérieure annulaire qui sont raccordées chacune par l'une de leurs extrémités à une arrivée d'eau comprenant une vanne d'arrêt ; ces canalisations aboutissent individuellement chacune soit à des canaux conduisant aux pics du disque rouilleur, soit à des chambres sectorielles annulaires convenables ménagées sur l'arbre, auxquelles correspondent des canaux qui sont répartis circonférentiellement sur la tambour et qui sont réunis chacun, par exemple, par un flexible à un pic correspondantOn a cutting drum having an end face provided with peaks, called a rusting disc, a cylindrical surface provided with peaks in which there are two opposite cylindrical sectors having two diametrically opposite parts and capable of having a common part, this drum also having an area central by which it is mounted on a fixed shaft which has at least one free end face, according to the invention, there are provided in the shaft and in the central zone of the drum three concentric pipes to the shaft and to the drum in which there is a first cylindrical inner pipe, a second annular intermediate pipe and a third annular outside pipe which are each connected by one of their ends to a water inlet comprising a stop valve; these pipes each individually lead either to channels leading to the peaks of the rusting disc, or to suitable annular sectoral chambers formed on the shaft, to which correspond channels which are distributed circumferentially on the drum and which are each joined, for example, by a hose at a corresponding peak

De préférence, la première canalisation intérieure cylindrique aboutit aux pics du disque rouilleur.Preferably, the first cylindrical inner pipe leads to the peaks of the rusting disc.

De préférence aussi, la deuxième canalisation intermédiaire est plus longue par sa partie extrême terminale que la troisième canalisation extérieure et plusieurs canaux radiaux réunissent ces canalisations aux chambres sectorielles annulaires correspondantes qui sont situées dans des plans transversaux espacés en sens axial.Preferably also, the second intermediate pipe is longer by its end end portion than the third external pipe and several radial channels join these pipes to the corresponding annular sectoral chambers which are located in transverse planes spaced in the axial direction.

Sur un bras de havage, l'espace disponible en sens axial est extrêmement limité.On a lifting arm, the space available in the axial direction is extremely limited.

Selon l'invention, avantageusement, à leurs extrémités éloignées du disque rouilleur du tambour, les canalisations ménagées dans l'arbre se terminent à proximité d'un disque fixe transversal dans lequel sont creusés des canaux d'alimentation radiaux dans un même plan perpendiculaire à l'axe du tambour ; ces canaux d'alimentation sont raccordés par leurs extrémités extérieures à des tubes d'arrivée d'eau ; leurs extrémités intérieures sont prolongées par des passages internes jusqu'aux extrémités des canalisations. De cette façon, avec un faible encombrement en sens axial, on peut alimenter par plusieurs tubes d'arrivée d'eau et plusieurs passages internes, l'une quelconque des canalisations, en fonction du débit d'arrosage nécessaire.According to the invention, advantageously, at their ends remote from the rusty disc of the drum, the pipes formed in the shaft end near a fixed transverse disc in which are hollowed out radial feed channels in the same plane perpendicular to the axis of the drum; these supply channels are connected by their outer ends to water inlet tubes; their inner ends are extended by internal passages up to the ends of the pipes. In this way, with a small footprint in the axial direction, it is possible to feed by several water inlet tubes and several internal passages, any one of the pipes, according to the required watering rate.

On donnera maintenant, sans intention limitative et sans exclure aucune variante, une description d'un mode préféré de réalisation. on se raportera aux dessins annexés dans lesquels :

  • - la figure 1 est une représentation schématique de la position de deux tambours de havage sur un bras de havage, faisant comprendre la nécessité de l'alimentation sectorielle des pics,
  • - la figure 2, est une représentation schématique d'un tambour de havage en position haute et en position basse montrant les secteurs utilisés,
  • - la figure 3 est une vue partielle en coupe se/on III-III de la figure 5,
  • - la figure 4 est une vue partielle en coupe selon IV-IV de la figure 5,
  • - la figure 5 est une vue partielle en coupe longitudinale par un plan passant par l'axe de l'arbre fixe qui porte un tambour de havage,
  • - la figure 6 est une vue en coupe longitudinale comme la figure 5 de la partie extrême de l'arbre éloignée du disque rouilleur du tambour de havage,
  • - la figure 7 est une vue en coupe selon VII-VII de la figure 6.
We will now give, without limiting intention and without excluding any variant, a description of a preferred embodiment. we will refer to the attached drawings in which:
  • FIG. 1 is a diagrammatic representation of the position of two cutting drums on a cutting arm, showing the need for sectoral supply of the peaks,
  • FIG. 2 is a schematic representation of a lifting drum in the high position and in the low position showing the sectors used,
  • FIG. 3 is a partial view in section se / on III-III of FIG. 5,
  • FIG. 4 is a partial sectional view along IV-IV of FIG. 5,
  • FIG. 5 is a partial view in longitudinal section through a plane passing through the axis of the fixed shaft which carries a lifting drum,
  • FIG. 6 is a view in longitudinal section like FIG. 5 of the end part of the shaft remote from the rusty disc of the cutting drum,
  • - Figure 7 is a sectional view along VII-VII of Figure 6.

r La figure 1 montre schématiquement un premier tambour de havage 1 et un second tambour de havage 2 qui équipent une haveuse se déplaçant en sens horizontal de la droite vers la gauche, comme indiqué par une flèche F,. Le premier tambour 1 est en position haute et le second tambour 2 est en position basse. A la fin de la course en sens F,, la haveuse se déplace en sens opposé F, après basculement des tambours 1, 2 comme indiqué par des flèches F" de sorte que le premier tambour 1 se met en position basse et que le second tambour 2 se met en position haute.r Figure 1 schematically shows a first cutting drum 1 and a second cutting drum 2 which equip a cutting machine moving horizontally from right to left, as indicated by an arrow F ,. The first drum 1 is in the high position and the second drum 2 is in the low position. At the end of the stroke in direction F, the cutter moves in the opposite direction F, after tilting of the drums 1, 2 as indicated by arrows F "so that the first drum 1 moves to the low position and the second drum 2 moves to the high position.

La figure 2 montre plus clairement le changement des secteurs actifs par lesquels le charbon est attaqué, qui résulte de changement de position haute ou basse de tambour 1 à la suite de son basculement selon F,, autour d'une centre 0. En position haute, tout le secteur cylindrique G gauche de la surface latérale du tambour 1 est actif sur 180°. En position basse, le secteur cylindrique D droit est actif sur 120°. Du fait de basculement les deux secteurs G et D ont une partie commune C indiquée par des hachures serrées qui est toujours active.FIG. 2 shows more clearly the change in the active sectors by which the coal is attacked, which results from a change in the high or low position of the drum 1 following its tilting along F ,, around a center 0. In the high position , the entire left cylindrical sector G of the lateral surface of the drum 1 is active over 180 °. In the low position, the right cylindrical sector D is active over 120 °. Due to tilting the two sectors G and D have a common part C indicated by tight hatching which is always active.

Les pics de la partie commune C des secteurs ont besoin d'être arrosés en permanence, ceux du reste du secteur cylindrique G gauche et ceux du reste du secteur cylindrique D droit ont besoin d'être arrosés seulement quand le tambour de havage est en position haute ou basse respectivement Le dispositif d'arrosage sectoriel de l'invention procure ce résultat. En plus, il assure l'alimentation permanente en eau des pics du disque rouilleur qui attaquent le charbon dans les deux positions de tambour 1.The peaks of the common part C of the sectors need to be constantly sprinkled, those of the rest of the left cylindrical sector G and those of the rest of the right cylindrical sector D need to be watered only when the cutting drum is in position high or low respectively The sectoral sprinkler device of the invention provides this result. In addition, it ensures the permanent supply of water to the rusting disc peaks which attack the carbon in the two drum positions 1.

Un tambour de havage 1 étant bien connu de l'homme de l'art et, comme il n'est pas concerné dans son ensemble par l'invention, on ne la décrira pas en détail. Ce tambour 1 a une partie centrale 2 qui est montée tournante sur un arbre 3 immobile en rotation (figure 5). Cet arbre 3 est creux ; il est creusé de trous longitudinaux à diamètres étagés qui contiennent trois tubes 4,5,6 concentriques entre eux et concentriques à l'axe de l'arbre 3, faisant apparaître ainsi une première canalisation intérieure cylindrique 7, une deuxième canalisation intermédiaire annulaire 8 et une troisième canalisation extérieure annulaire 9, également concentriques.A cutting drum 1 being well known to those skilled in the art and, as it is not generally concerned with the invention, it will not be described in detail. This drum 1 has a central part 2 which is rotatably mounted on a shaft 3 which is stationary in rotation (FIG. 5). This tree 3 is hollow; it is dug with longitudinal holes with stepped diameters which contain three tubes 4,5,6 concentric with each other and concentric with the axis of the shaft 3, thus making appear a first cylindrical inner pipe 7, a second annular intermediate pipe 8 and a third annular external pipe 9, also concentric.

A la partie extrême de l'arbre 2 qui est proche du tambour, représentée sur la figure 5, la première canalisation intérieure cylindrique 7 est prolongée par un canal 7A jusqu' à un embout central de raccordement 10 à partir duquel partent des tuyaux souples 10A qui aboutissent aux pic du disque rouilleur.At the extreme part of the shaft 2 which is close to the drum, shown in FIG. 5, the first cylindrical interior pipe 7 is extended by a channel 7A up to a central connection piece 10 from which flexible hoses 10A leave which lead to the peaks of the rusty disc.

La deuxième canalisation intermédiaire 8 de la troisième canalisation extérieure 9 se terminent par des parties extrêmes situées dans des plans transversaux IV-IV et III-III respectivement, espacés en sens axial de l'arbre 3, dans lesquels sont ménagés des canaux radiaux 11,12 respectivement. Dans le plan III-III, figure 3, les canaux radiaux 12 se terminent, dans l'épaisseur le l'arbre 3, dans une chambre sectorielle annulaire 13, contenue dans ce plan III-III, creusée à la surface de l'arbre 3, et se développant sur 180°. Toujours dans le plan III-III, des canaux radiaux 14 sont prévus dans la partie centrale 2 du tambour 1 ; leur nombre correspond à celui des pics de la face latérale du tambour 1 et ils sont espacés régulièrement en sens circonférentiel. Ils sont prolongés chacun dans le tambour 1 par des canaux longitudinaux 15 puis par des canaux radiaux terminaux 16 (figure 5) qui aboutissent à des embouts de raccordement 17 d'où partent des flexibles 18. Ces derniers s'étendent respectivement chacun jusqu'aux pics de la surface latérale du tambour.The second intermediate pipe 8 of the third external pipe 9 ends in end portions situated in transverse planes IV-IV and III-III respectively, spaced in axial direction from the shaft 3, in which radial channels 11 are formed, 12 respectively. In plane III-III, FIG. 3, the radial channels 12 end, in the thickness of the shaft 3, in an annular sectoral chamber 13, contained in this plane III-III, hollowed out on the surface of the shaft 3, and developing over 180 °. Still in the plane III-III, radial channels 14 are provided in the central part 2 of the drum 1; their number corresponds to that of the peaks of the lateral face of the drum 1 and they are regularly spaced in the circumferential direction. They are each extended in the drum 1 by longitudinal channels 15 and then by terminal radial channels 16 (FIG. 5) which lead to connection end pieces 17 from which flexible hoses 18. These last each extend respectively to peaks of the lateral surface of the drum.

Dans le plan IV-IV, il existe une disposition analogue à celle qui vient d'être décrite. Les canaux radiaux 11 se terminent dans une chambre sectorielle annulaire 19, creusée à la surface de l'arbre 3, mais qui ne s'étend que sur un arc de 120°. Dans la partie centrale du tambour 1, des canaux radiaux 20 suivie de canaux longitudinaux 21 sont reliés aux embouts de raccordement 17, aux flexibles 18 et aux pics.In plan IV-IV, there is a provision similar to that just described. The radial channels 11 terminate in an annular sectoral chamber 19, hollowed out on the surface of the shaft 3, but which only extends over an arc of 120 °. In the central part of the drum 1 , radial channels 20 followed by longitudinal channels 21 are connected to the connection end pieces 17, to the hoses 18 and to the peaks.

Les deux chambres sectorielles annulaires 13 et 19 sont disposées, en sens circonférentiel, en correspondance avec les secteurs actifs G et D du tambour 1 (figure 1) et elles se recouvrent en concordance avec la partie commune C. Pendant la rotation du tambour 1, les pics qui sont réunis aux canaux radiaux 14 et 20 sont alimentés en eau seulement quant ces canaux passent, en tournant, en regard des chambres sectorielles 13 et 19. Ces dernières sont alimentées en eau par la troisième canalisation extérieure annulaire 9 ou par la deuxième canalisation in- tennédiaire annulaire 8 selon la position haute ou basse du tambour 1. Das clapets antiretour 22, 23 sont prévus sur les canaux longitudinaux 15, 21 (figure 5) pour éviter que l'eau envoyée par un circuit reflue par l'autre circuitThe two annular sectoral chambers 13 and 19 are arranged, in circumferential direction, in correspondence with the active sectors G and D of the drum 1 (FIG. 1) and they overlap in accordance with the common part C. During the rotation of the drum 1, the peaks which are joined to the radial channels 14 and 20 are supplied with water only when these channels pass, in rotation, opposite the sectoral chambers 13 and 19. The latter are supplied with water by the third annular external pipe 9 or by the second annular intermediate pipe 8 according to the high or low position of the drum 1. Das non-return valves 22, 23 are provided on the longitudinal channels 15, 21 (FIG. 5) to prevent the water sent by one circuit from flowing back through the other circuit

Les canalisations concentriques 7, 8, 9 sont alimentées en eau, de manière continuelle pour la canalisation 7, de manière alternée pour les canalisations 8, 9 à l'extrémité de l'arbre 3 éloignée du disque rouilleur du tambour, de préférence de la façon que l'on décrira maintenant en se référant aux figures 6 et 7.The concentric pipes 7, 8, 9 are supplied with water, continuously for the pipe 7, alternately for the pipes 8, 9 at the end of the shaft 3 remote from the rusting disc of the drum, preferably from the as will now be described with reference to FIGS. 6 and 7.

Du côté de l'arrivée de l'eau d'alimentation, les tubes 4, 5, 6 et par conséquent, les canalisations concentriques 7, 8, 9 se terminent dans des plans espacés en sens axial, et chaque canalisation débouche dans un volume d'alimentation 24, 25, 26 respectivement situé dans son prolongement. Ces volumes 24,25,26 et les parties extrêmes des tubes 4,5,6 se trouvent dans une pièce fixe 27 se terminant par un disque 28 disposé dans un plan transversal à l'axe du tambour de havage. Ce disque 28 a l'épaisseur Juste suffisante pour permettre d'y creuser des canaux d'alimentation radiaux 29,30,31,32. Ces derniers sont donc espacés en sens circonférentiel ; à leurs extrémités extérieures, ils sont raccordés à des tubes d'arrivée d'eau 33, 34, 35, 36 respectivement. Le canal d'alimentation radial 29 débouche directement dans le volume d'alimentation 26 de la première canalisation intérieure cylindrique 7. Le canal d'alimentation radial 30 est relié par des passages internes (un passage longitudinal 37 puis un passage radial 38 creusés dans la pièce fixe 27) au volume d'alimentation 25 de la deuxième canalisation annulaire intermédiaire 8. Les deux canaux d'alimentation 31, 32 aboutissent tous deux au volume d'alimentation 24 de la troisième canalisation annulaire extérieure 9 par l'intermédiaire de passages internes longitudinaux 39 et radiaux 40. Avec un disque 28 de faible épaisseur et par conséquent de faible encombrement en sens axial, on peut alimenter chacune des canalisations concentriques 7, 8, 9 à l'aide de plusieurs tubes d'arrivée d'eau 33 à 36 si le débit l'exige. Sur les tubes d'arrivée d'eau 34 et 35, 36 sont montées des vannes d'arrêt (non représentées) qui sont ouvertes ou fermées, automatiquement, en fonction de la position haute ou basse donnée au tambour de havage.On the supply water inlet side, the tubes 4, 5, 6 and consequently, the concentric pipes 7, 8, 9 end in planes spaced apart in an axial direction, and each pipe opens into a volume supply 24, 25, 26 respectively located in its extension. These volumes 24, 25, 26 and the end parts of the tubes 4,5, 6 are located in a fixed part 27 ending in a disc 28 arranged in a plane transverse to the axis of the cutting drum. This disc 28 has the thickness Just sufficient to allow the digging of radial supply channels 29,30,31,32. The latter are therefore spaced in circumferential direction; at their outer ends, they are connected to water inlet tubes 33, 34, 35, 36 respectively. The radial supply channel 29 opens directly into the supply volume 26 of the first cylindrical inner pipe 7. The radial supply channel 30 is connected by internal passages (a longitudinal passage 37 then a radial passage 38 hollowed out in the fixed part 27) to the supply volume 25 of the second intermediate annular pipe 8. The two supply channels 31, 32 both terminate in the supply volume 24 of the third external annular pipe 9 via internal passages longitudinal 39 and radial 40. With a disc 28 of small thickness and consequently of compactness in the axial direction, it is possible to supply each of the concentric pipes 7, 8, 9 using several water inlet tubes 33 to 36 if the debit requires it. On the water inlet tubes 34 and 35, 36 are mounted stop valves (not shown) which are opened or closed, automatically, depending on the high or low position given to the lifting drum.

L'étendue en sens circonférentiel des chambres sectorielles 13, 19 est choisie en correspondance avec celle des secteurs cylindriques actifs G, D du tambour de havage. L'étendue du secteur actif G en position haute du tambour est généralement de 180°, bien que l'on puisse souhaiter faire l'arrosage sur une étendue plus grande susceptible d'atteindre 210° environ. L'étendue angulaire du secteur actif D en position basse du tambour est variable selon la hauteur du front de taille; elle peut se situer en pratique entre 60 et 180°.The extent in the circumferential direction of the sectorial chambers 13: 1 9 is selected in correspondence with the active inventory cylindrical sectors G, D A cutting drum. The extent of the active sector G in the high position of the drum is generally 180 °, although it may be desired to sprinkle over a greater extent capable of reaching approximately 210 °. The angular extent of the active sector D in the lower position of the drum is variable depending on the height of the cutting face; it can be in practice between 60 and 180 °.

Claims (6)

1. Dispositif d'arrosage sectoriel des pics d'un tambour de havage (1) ayant une face extrême ou disque rouilleur munie de pics et une surface cylindrique munie de pics dans laquelle on distingue deux secteurs cylindriques opposés (G, D), avec une partie commune éventuelle (C), ces secteurs opposés (G, D) étant actifs en alternance selon le sens de déplacement du tambour (1), caractérisé en ce qu'il comprend, dans la zone centrale du tambour (1), trois canalisations concentriques (7, 8,9) qui sont raccordées chacune par une extrémité à au moins un tube d'arrivée d'eau (33 à 36) et qui mènent individuellement chacune soit à des canaux (10A) conduisant aux pics du disque rouilleur, soit à des chambres sectorielles annulaires fixes (13, 19) auxquelles correspondent des canaux (14, 20) mobiles en rotation répartis circonférentiellement réunis aux pics de la face latérale cylindrique du tambour de havage (1), ces chambres sectorielles (13, 19) ayant des positions relatives et des étendues en sens circonférentiel qui correspondent à celles des secteurs cylindriques actifs (G, D) du tambour (1 ).1. Device for sectorally sprinkling the peaks of a cutting drum (1) having an end face or rusting disc provided with peaks and a cylindrical surface provided with peaks in which there are two opposite cylindrical sectors (G, D), with a possible common part (C), these opposite sectors (G, D) being active alternately according to the direction of movement of the drum (1), characterized in that it comprises, in the central zone of the drum (1), three concentric pipes (7, 8, 9) which are each connected at one end to at least one inlet tube d '' (33 to 36) and which each lead individually either to channels (10A) leading to the peaks of the rusting disc, or to fixed annular sectoral chambers (13, 19) to which correspond channels (14, 20) movable in rotation distributed circumferentially joined to the peaks of the cylindrical lateral face of the cutting drum (1), these sectoral chambers (13, 19) having relative positions and expanses in circumferential direction which correspond to those of the active cylindrical sectors (G, D) of the drum (1). 2. Dispositif selon le revendication 1 caractérisé en ce que la première canalisation intérieure (7) est cylindrique et prolongée par un canal (7A) jusqu'à un embout central (10) de raccordement aux pics du disque rouilleur.2. Device according to claim 1 characterized in that the first inner pipe (7) is cylindrical and extended by a channel (7A) to a central nozzle (10) for connection to the peaks of the rusting disc. 3. Dispositif selon la revendication 2 caractérisé en ce que la deuxième canalisation intermédiaire annulaire (8) est plus longue par sa partie extrême terminale que la troisième canalisation extérieure annulaire (9) et plusieurs canaux radiaux respectifs (11, 12) réunissent ces canalisations aux chambres sectorielles correspondantes (13, 19) qui se trouvent dans des plans transversaux espacés en sens axial.3. Device according to claim 2 characterized in that the second annular intermediate pipe (8) is longer by its end end portion than the third annular external pipe (9) and several respective radial channels (11, 12) join these pipes to Corresponding sectoral chambers (13, 19) which lie in transversely spaced transverse planes. 4. Dispositif selon la revendication 1 caractérisé en ce que l'étendue angulaire de la chambre sectorielle (13) qui correspond à un secteur cylindrique (G) actif en position haute du tambour de havage (1) est choisie entre 180° et 210° cependant que l'étendue angulaire de la chambre sectorielle (19) qui correspond à un secteur cylindrique (D) actif en position basse du tambour de havage (1) est choisie entre 600 et 180°.4. Device according to claim 1 characterized in that the angular extent of the sectoral chamber (13) which corresponds to a cylindrical sector (G) active in the high position of the lifting drum (1) is chosen between 180 ° and 210 ° however, that the angular extent of the sectoral chamber (19) which corresponds to a cylindrical sector (D) active in the low position of the lifting drum (1) is chosen between 600 and 180 °. 5. Dispositif selon la revendication 1 caractérisé en ce que, à leur extrémité éloignée du disque rouilleur du tambour de havage (1), les canalisations concentriques (7,8,9) se terminent à proximité d'un disque fixe transversal (28) dans lequel sont creusés dans un même plan perpendiculaire à l'axe du tambour des canaux d'alimentation radiaux (29,30, 31,32) ayant des extrémités extérieures raccordées à des tubes d'arrivée d'eau et des extrémités intérieures prolongées par des passages internes (39,40) jusqu'ax extrémités des canalisations concentriques (7, 8, 9).5. Device according to claim 1 characterized in that, at their end remote from the rusting disc of the cutting drum (1), the concentric pipes (7,8,9) terminate near a transverse fixed disc (28) in which radial feed channels (29, 30, 31, 32) are hollowed out in the same plane perpendicular to the axis of the drum, having external ends connected to water inlet tubes and internal ends extended by internal passages (39.40) up to the ends of the concentric pipes (7, 8, 9). 6. Dispositif selon la revendication 5 caractérisé en ce qu'au moins une canalisation concentrique (9) est réunie par des passages internes (39,40) à deux canaux d'alimentation radiaux (31, 32) ménagés dans le disque transversal (28).6. Device according to claim 5 characterized in that at least one concentric pipe (9) is joined by internal passages (39,40) to two radial supply channels (31, 32) formed in the transverse disc (28 ).
EP85402237A 1984-11-20 1985-11-19 Sector spraying device in coal mining Expired EP0185571B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85402237T ATE37070T1 (en) 1984-11-20 1985-11-19 SECTOR BLOWING EQUIPMENT IN COAL PRODUCTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8417654 1984-11-20
FR8417654A FR2573474B1 (en) 1984-11-20 1984-11-20 SECTORAL WATERING DEVICE FOR COAL SLAUGHTERING

Publications (2)

Publication Number Publication Date
EP0185571A1 true EP0185571A1 (en) 1986-06-25
EP0185571B1 EP0185571B1 (en) 1988-09-07

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EP85402237A Expired EP0185571B1 (en) 1984-11-20 1985-11-19 Sector spraying device in coal mining

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US (1) US4660892A (en)
EP (1) EP0185571B1 (en)
JP (1) JPS61165489A (en)
CN (1) CN1004365B (en)
AT (1) ATE37070T1 (en)
AU (1) AU581945B2 (en)
DE (1) DE3564846D1 (en)
ES (1) ES8609580A1 (en)
FR (1) FR2573474B1 (en)
IN (1) IN165786B (en)
PL (1) PL149309B1 (en)
ZA (1) ZA858856B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8612968D0 (en) * 1986-05-28 1986-07-02 Presswell Eng Ltd Operating head
US5507565A (en) * 1994-12-19 1996-04-16 Eimco Coal Machinery, Inc. Method and apparatus for suppressing dust and frictional ignition on a continuous mining machine
US6070944A (en) * 1997-08-11 2000-06-06 Eimco Llc Phasing valve assembly for supplying water to a mining machine cutter drum
GB2333548B (en) * 1997-08-11 2001-12-12 Eimco Coal Machinery Inc A method and apparatus for supplying water to a mining machine cutter drum
GB0200880D0 (en) * 2002-01-16 2002-03-06 Hydra Mining Tools Internat Lt Rotary cutting head for a mining etc machine
CN106837327A (en) * 2017-04-07 2017-06-13 中国矿业大学 A kind of water-saving and synergistic automatic control hydraulic cutterhead

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1455734A (en) * 1964-12-05 1966-10-14 Eickhoff Geb Device for adding a liquid to sprinkling nozzles distributed around the periphery of a rotating felling tool, in particular a cutting drum
US3374033A (en) * 1966-02-21 1968-03-19 Lee Norse Co Cutter head having fluid supply means
GB1110763A (en) * 1963-10-29 1968-04-24 Coal Industry Patents Ltd Dust suppression means for use with mining machines
FR2370850A1 (en) * 1976-11-16 1978-06-09 Coal Industry Patents Ltd FELLING MACHINE INCLUDING A ROTATING HAVING PLATE
GB2089869A (en) * 1980-12-24 1982-06-30 Paurat F A mining machine for cutting coal and/or rock

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1378456A (en) * 1972-05-19 1974-12-27 Coal Industry Patents Ltd Apparatus for ventilating cutter-heads of mineral mining machines
DE2808915C2 (en) * 1978-03-02 1982-07-29 Gebr. Eickhoff, Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Roller cutting machine for underground mining
DE3139012C2 (en) * 1981-10-01 1985-02-21 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Roller cutting machine for underground mining
US4516807A (en) * 1981-10-13 1985-05-14 Coal Industry (Patents) Limited Fluid supply systems for rotary cutter heads for mining machines and rotary cutter heads comprising fluid supply systems
AT378037B (en) * 1982-09-09 1985-06-10 Voest Alpine Ag DEVICE FOR SUPPLYING A PRESSURIZED LIQUID TO A ROTATING MACHINE PART
DE3246991A1 (en) * 1982-12-18 1984-06-20 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum DEVICE FOR CONTROLLING HIGH PRESSURE LIQUID
AT378036B (en) * 1983-04-11 1985-06-10 Voest Alpine Ag METHOD FOR SPRAYING THE CHISELS AND / OR LOCAL CHEST WITH PRESSURE LIQUID AND DEVICE FOR CARRYING OUT THIS METHOD

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1110763A (en) * 1963-10-29 1968-04-24 Coal Industry Patents Ltd Dust suppression means for use with mining machines
FR1455734A (en) * 1964-12-05 1966-10-14 Eickhoff Geb Device for adding a liquid to sprinkling nozzles distributed around the periphery of a rotating felling tool, in particular a cutting drum
US3374033A (en) * 1966-02-21 1968-03-19 Lee Norse Co Cutter head having fluid supply means
FR2370850A1 (en) * 1976-11-16 1978-06-09 Coal Industry Patents Ltd FELLING MACHINE INCLUDING A ROTATING HAVING PLATE
GB2089869A (en) * 1980-12-24 1982-06-30 Paurat F A mining machine for cutting coal and/or rock

Also Published As

Publication number Publication date
AU5002685A (en) 1986-05-29
ES549006A0 (en) 1986-07-16
AU581945B2 (en) 1989-03-09
ZA858856B (en) 1986-08-27
FR2573474A1 (en) 1986-05-23
FR2573474B1 (en) 1986-12-26
CN85108377A (en) 1986-10-01
ATE37070T1 (en) 1988-09-15
JPS61165489A (en) 1986-07-26
JPH0327720B2 (en) 1991-04-16
IN165786B (en) 1990-01-13
PL149309B1 (en) 1990-01-31
CN1004365B (en) 1989-05-31
ES8609580A1 (en) 1986-07-16
DE3564846D1 (en) 1988-10-13
EP0185571B1 (en) 1988-09-07
US4660892A (en) 1987-04-28
PL256284A1 (en) 1986-09-23

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