EP0245778B1 - Double tangential nozzle - Google Patents

Double tangential nozzle Download PDF

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Publication number
EP0245778B1
EP0245778B1 EP87106620A EP87106620A EP0245778B1 EP 0245778 B1 EP0245778 B1 EP 0245778B1 EP 87106620 A EP87106620 A EP 87106620A EP 87106620 A EP87106620 A EP 87106620A EP 0245778 B1 EP0245778 B1 EP 0245778B1
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EP
European Patent Office
Prior art keywords
bores
tube
water
dampening
nozzle
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Expired
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EP87106620A
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German (de)
French (fr)
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EP0245778A1 (en
Inventor
Fred Homberg
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Saarbergwerke AG
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Saarbergwerke AG
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Priority to AT87106620T priority Critical patent/ATE45205T1/en
Publication of EP0245778A1 publication Critical patent/EP0245778A1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/02—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
    • B28C5/026—Mixing guns or nozzles; Injector mixers

Definitions

  • the invention relates to a wetting nozzle for dams used in underground mining and tunneling, which is installed in the dam building material supply line and is provided with a water connection, with flanges on both sides and tangentially arranged nozzle-shaped bores for the spraying water pipe.
  • Wetting nozzles of this type are used in particular in underground mining and tunnel construction in order to wet the dry, pneumatically brought material to the place of use before it is introduced into the dam and to mix it sufficiently with water in order to solidify the dam building material in this way .
  • Wetting nozzles of this type should supply so much water to the dam building material that as little as possible is released during discharge. Even in the case of granular dam building materials such as anhydrite, sufficiently intensive wetting with water is required to reduce the dust load.
  • Wetting nozzles are known in which nozzle inserts extend into the tube, so that wetting water is usually discharged through the nozzles in the conveying direction. The disadvantages here are the wear occurring on the nozzles and the nozzle holders and the insufficient wetting of the dam construction material.
  • So-called tangential wetting nozzles are used to reduce wear and improve the wetting of the dam building material with water.
  • the water is introduced from two tangentially arranged bores.
  • a flat jet nozzle in the upper pipe cross-section.
  • the disadvantage here is that a separate water connection is necessary for each of the nozzles and that, despite the tangential arrangement of the nozzles, a sufficient mixing effect with the wetting water is not always guaranteed.
  • the costs for the special nozzles, in particular the flat jet nozzle are disadvantageous.
  • the invention has for its object to further improve the wetting of the dam building material in the wetting nozzle and above all to make it even.
  • the tube is designed to form an annular space and the bores connecting the annular space to the delivery space and are arranged one behind the other in several planes.
  • Such a wetting nozzle is surprisingly short and results in a significantly reduced dust load. Due to the small size, easy handling and easy handling are possible. In particular, even if there are several nozzles or bores, the entire wetting nozzle requires only one water connection in each case, because all are supplied with the necessary water uniformly via the annular space. It is also advantageous that there are no internals in the cross-section, so that the abrasive material to be conveyed can also be properly guided through this area without any plug formation. It is also advantageous that special nozzles can be dispensed with entirely and that the reduced wear results in long service lives with little maintenance.
  • the nozzles are arranged facing each other on each level, the outgoing water jets meet and divide up so evenly that an intensive mixing of the material to be conveyed is achieved. This achieves the aforementioned reduction in dust pollution.
  • the water jacket formed on the pipe wall has a positive effect.
  • the tube is designed as a double tube having an outer and inner tube. In this way, the necessary annulus can be achieved easily and without great design effort, even in the dimensions required.
  • the bores are expediently formed and arranged at half the height in the wall of the inner tube in order to ensure that the water jets emanating from the bores set against one another meet in the nozzle highest or lowest, from where the individual water droplets are catapulted into the material to be conveyed .
  • the bores are designed to emit the water jet at an angle, preferably 6 ° .
  • the tangentially positioned bores send out the water jet about a quarter of the circumference of the pipe before the two opposing water jets meet exactly in the middle, ie at the nozzle's highest or lowest.
  • Adequate mixing and wetting success is achieved when four holes are arranged in two planes one behind the other. In the event that the wetting achieved in this way is insufficient, it is either possible to use wetting nozzles with further bores arranged in further planes or to connect another wetting nozzle designed in this way to the first.
  • the second wetting nozzle is expediently arranged offset from the first so that the corresponding bores of the second nozzle also emit their water jet offset from the first nozzle or the bores there.
  • the four bores assigned to a wetting nozzle are each arranged in the opposite direction to discharge each level.
  • the first nozzle combination arranged in the conveying direction discharges in such a way that the two water jets meet in the nozzle top, while the second group of holes is arranged in such a way that the water jets meet in the nozzle deepest and from there their water droplets in the direction of the conveyed material and in catapult this into it.
  • the bores at a distance preferably having a quarter of the total length of the nozzle assign. With such a spacing of the bores there is a uniform and intensive distribution of the water jets and the water droplets that meet. In the case of a conventional nozzle, this means that the bores of the two planes are approximately 3 to 4 cm apart.
  • An expedient embodiment of the invention provides that the tube has two water connections in the form of Stecko DN-20 connections, which are offset from the holes in the annular space.
  • the staggered arrangement of the water connections to the holes ensures an even supply of water to the holes, whereby two water connections optimize this supply.
  • the second being usually closed.
  • the invention provides that the lower water connection can be closed by a plug. The lower water connection serves to flush and empty the entire nozzle after the blowing process. This ensures a long service life for such wetting nozzles.
  • a practical and simple design of the double tube is that in which the outer tube is placed on the inner tube having the flanges.
  • the annular space between the two tubes is formed exclusively in the width that is necessary for the bores to be arranged at a distance.
  • Either the ends of the outer tube are chamfered or the necessary annular space is excluded from the wall of the outer tube, so that the necessary seal at the end of the outer tube can be easily produced from the inner tube.
  • the invention is characterized in particular by the fact that a wetting nozzle having numerous advantages is created, which in particular leads to a significantly reduced dust load, because the dam building material is mixed thoroughly and flies through several such mixing zones, preferably two, before it leaves the wetting nozzle again.
  • the water enters the wetting nozzle at high speed, initially covers about a quarter of the circumference after leaving the bore and hits the jet of water of the assigned bore at the highest or lowest point of the nozzle.
  • the water sprays in a nozzle shape into the center of the delivery chamber, causing intensive mixing.
  • the small dimensions of such wetting nozzles and the possibility of cleaning them quickly and intensively when the respective conveying process is completed are also advantageous. Since a uniform supply of water to the holes is achieved through the annular space, it is also ensured that the two opposing water jets meet at the intended point and with the same intensity, so that the uniform distribution of the two water jets can ensure intensive wetting.
  • the nozzle (I) shown in Fig. I consists of a tube (2), which has flanges (3, 4) at both ends, via which a connection to the dam building material supply line can be produced quickly and without great effort. Via a water connection (5) which opens into the outer tube (6), the nozzles or bores, which are not visible here in detail, are evenly supplied with water.
  • the nozzle-shaped end of the bores (9, lo) is indicated in Fig. 2, with Figs. 3 and 4 showing the entire nozzle-shaped course of the bores (9, lo and 15, 16).
  • the bores (9, 15 and 10, 16) forming a group are each assigned spaced planes, which ensures a correspondingly intensive wetting of the conveyed material which flows through the conveying space (12) in the conveying direction (13).
  • a further water connection (14) is provided on the lower circumference of the outer tube (6), but is generally not required for supplying the water, but rather is provided for rinsing and cleaning processes and is usually closed by a stopper.
  • the water jets leaving the nozzles (9, 15) in the direction of the water connection (5) meet approximately at the level of the water connection but offset in the conveying direction (13), the water spraying apart in a nozzle shape due to the collision.
  • Both water jets form an overall effective water film on the pipe wall, which also has a positive effect. The water film wraps itself around the material to be conveyed, thus further reducing dust pollution.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Nozzles (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cyclones (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

1. Dampening nozzle for barrier forming materials in underground mining and tunnelling, which is incorporated into the barrier forming material supply conduit and provided with a water connection, having a tube flange on both ends and having tangentially arranged, nozzle-shaped bores for the dampening water, characterized in that the tube (2) is formed to have an annular space (11) and that the bores (9, 10, 15, 16) opening into the inner tube (7) tangentially cut at right angles to the flow direction (13) connect the annular space with the flow space (12) and are arranged in several planes along the flow direction, in which the bores in each plane are arranged on the periphery of the inner tube displaced by 180 degrees from each other and that each plane is arranged rotationally displaced from the neighboring plane.

Description

Die Erfindung betrifft eine Benetzungsdüse für im untertägigen Berg- und Tunnelbau eingesetzte Dammbaustoffe, die in die Dammbaustoffversorgungsleitung eingebaut und mit einem Wasseranschluß versehen ist, mit einem beidseitig Flansche und tangential angesetzte düsenförmige Bohrungen für das Bedüsungswasser aufweisenden Rohr.The invention relates to a wetting nozzle for dams used in underground mining and tunneling, which is installed in the dam building material supply line and is provided with a water connection, with flanges on both sides and tangentially arranged nozzle-shaped bores for the spraying water pipe.

Derartige Benetzungsdüsen werden insbesondere im untertägigen Berg- und Tunnelbau eingesetzt, um das trocken, pneumatisch bis an den Einsatzort herangebrachte Material vor dem Einbringen in den Damm zu benetzen und ausreichend mit Wasser zu durchmischen, um auf diese Art und Weise ein Verfestigen des Dammbaustoffes zu erreichen. Derartige Benetzungsdüsen sollen daßei dem Dammbaustoff so viel Wasser zuführen, daß beim Austragen möglichst wenig Stauß freigesetzt wird. Auch bei körnigen Dammbaustoffen wie Anhydrit ist zur Reduzierung der Staubbelastung eine ausreichend intensive Benetzung mit Wasser erforderlich. Bekannt sind Benetzungsdüsen, bei denen in das Rohr Düseneinsätze hineinreichen, um so Benetzungswasser über die Düsen meist in Förderrichtung auszutragen. Nachteilig dabei ist der an den Düsen und den Düsenhalterungen auftretende Verschleiß und das zu geringe Benetzen des Dammbaumaterials. Um den Verschleiß zu reduzieren und die Benetzung des Dammbaustoffes mit Wasser zu verbessern, sind sogenannte Tangentialbenetzungsdüsen im Einsatz. Bei diesen Düsen wird das Wasser aus zwei tangential angeordneten Bohrungen eingeleitet. Um auch das im Rohrtiefsten fließende Fördergut ausreichend anzufeuchten, ist es erforderlich, zusätzlich eine Flachstrahldüse im oberen Rohrquerschnitt anzuordnen. Nachteilig dabei ist, daß für jede der Düsen ein gesonderter Wasseranschluß notwendig ist und daß trotz der tangentialen Anordnung der Düsen ein ausreichender Mischeffekt mit dem Benetzungswasser nicht immer gewährleistet ist. Darüber hinaus sind die Kosten für die speziellen Düsen, insbesondere die Flachstrahldüse von Nachteil.Wetting nozzles of this type are used in particular in underground mining and tunnel construction in order to wet the dry, pneumatically brought material to the place of use before it is introduced into the dam and to mix it sufficiently with water in order to solidify the dam building material in this way . Wetting nozzles of this type should supply so much water to the dam building material that as little as possible is released during discharge. Even in the case of granular dam building materials such as anhydrite, sufficiently intensive wetting with water is required to reduce the dust load. Wetting nozzles are known in which nozzle inserts extend into the tube, so that wetting water is usually discharged through the nozzles in the conveying direction. The disadvantages here are the wear occurring on the nozzles and the nozzle holders and the insufficient wetting of the dam construction material. So-called tangential wetting nozzles are used to reduce wear and improve the wetting of the dam building material with water. With these nozzles, the water is introduced from two tangentially arranged bores. In order to adequately moisten the material to be conveyed flowing deepest in the pipe, it is also necessary to arrange a flat jet nozzle in the upper pipe cross-section. The disadvantage here is that a separate water connection is necessary for each of the nozzles and that, despite the tangential arrangement of the nozzles, a sufficient mixing effect with the wetting water is not always guaranteed. In addition, the costs for the special nozzles, in particular the flat jet nozzle, are disadvantageous.

Der Erfindung liegt die Aufgabe zugrunde, die Benetzung des Dammbaustoffes in der Benetzungsdüse weiter zu verbessern und vor allem auch zu vergleichmäßigen.The invention has for its object to further improve the wetting of the dam building material in the wetting nozzle and above all to make it even.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Rohr einen Ringraum ergebend ausgebildet und die Bohrungen den Ringraum mit dem Förderraum verbindend und in mehreren Ebenen hintereinander jeweils gegeneinander gerichtet angeordnet sind.The object is achieved in that the tube is designed to form an annular space and the bores connecting the annular space to the delivery space and are arranged one behind the other in several planes.

Eine derartige Benetzungsdüse baut überraschend kurz und erbringt eine wesentlich verringerte Staubbelastung. Aufgrund der geringen Bauma- ße ist eine gute Handlichkeit und einfache Handhabung möglich. Insbesondere erfordert auch bei mehreren Düsen bzw. Bohrungen die gesamte Benetzungsdüse jeweils nur einen Wasseranschluß, weil alle gleichmäßig über den Ringraum mit dem nötigen Wasser versorgt sind. Vorteilhaft ist weiter, daß im Querschnitt keinerlei Einbauten vorhanden sind, so daß das abrasive Fördergut einwandfrei auch durch diesen Bereich hindurchgeführt wird, ohne daß es zu einer Stopfenbildung kommen kann. Vorteilhaft ist weiter, daß auf spezielle Düsen ganz verzichtet werden kann und daß durch den verringerten Verschleiß hohe Standzeiten bei geringer Wartung gegeben sind. Dadurch, daß die Düsen gegeneinander gerichtet je Ebene angeordnet sind, treffen sich die ausgehenden Wasserstrahlen und zerteilen sich so gleichmäßig, daß eine intensive Durchmischung des Fördergutes erreicht ist. Dadurch wird die erwähnte Verringerung der Staubbelastung erzielt. Außerdem wirkt sich der gebildete Wassermantel an der Rohrwandung positiv aus.Such a wetting nozzle is surprisingly short and results in a significantly reduced dust load. Due to the small size, easy handling and easy handling are possible. In particular, even if there are several nozzles or bores, the entire wetting nozzle requires only one water connection in each case, because all are supplied with the necessary water uniformly via the annular space. It is also advantageous that there are no internals in the cross-section, so that the abrasive material to be conveyed can also be properly guided through this area without any plug formation. It is also advantageous that special nozzles can be dispensed with entirely and that the reduced wear results in long service lives with little maintenance. Because the nozzles are arranged facing each other on each level, the outgoing water jets meet and divide up so evenly that an intensive mixing of the material to be conveyed is achieved. This achieves the aforementioned reduction in dust pollution. In addition, the water jacket formed on the pipe wall has a positive effect.

Nach einer zweckmäßigen Ausbildung der Erfindung ist vorgesehen, daß das Rohr als ein Außen-und Innenrohr aufweisendes Doppelrohr ausgebildet ist. Auf diese Art und Weise kann der notwendige Ringraum auch in der jeweils notwendigen Abmessung einfach und ohne großen konstruktiven Aufwand erzielt werden.According to an expedient embodiment of the invention, it is provided that the tube is designed as a double tube having an outer and inner tube. In this way, the necessary annulus can be achieved easily and without great design effort, even in the dimensions required.

Zweckmäßigerweise sind die Bohrungen in halber Höhe in der Wandung des Innenrohres ausgebildet und angeordnet, um so zu erreichen, daß sich die von den gegeneinander angesetzten Bohrungen ausgehenden Wasserstrahlen jeweils im Düsenhöchsten bzw. -tiefsten treffen, von wo die einzelnen Wassertröpfchen in das Fördergut hineinkatapultiert werden.The bores are expediently formed and arranged at half the height in the wall of the inner tube in order to ensure that the water jets emanating from the bores set against one another meet in the nozzle highest or lowest, from where the individual water droplets are catapulted into the material to be conveyed .

Um eine Art Führung des die Bohrungen verlassenden Wasserstrahls an der Wandung des Innenrohres zu gewährleisten, ist vorgesehen, daß die Bohrungen den Wasserstrahl unter einem Winkel vorzugsweise 60° aussendend ausgebildet sind. Die tangential angesetzten Bohrungen senden dabei den Wasserstrahl etwa über ein Viertel des Rohrumfangs aus, bevor sich die beiden entgegengerichteten Wasserstrahlen genau mittig, d.h. im Düsenhöchsten bzw. -tiefsten treffen.In order to ensure a kind of guidance of the water jet leaving the bores on the wall of the inner tube, it is provided that the bores are designed to emit the water jet at an angle, preferably 6 ° . The tangentially positioned bores send out the water jet about a quarter of the circumference of the pipe before the two opposing water jets meet exactly in the middle, ie at the nozzle's highest or lowest.

Ein ausreichender Durchmischungs- und Benetzungserfolg ist gegeben, wenn vier Bohrungen in zwei Ebenen hintereinander angeordnet sind. Für den Fall, daß die damit erzielte Benetzung nicht ausreicht, ist es entweder möglich, Benetzungsdüsen mit weiteren, in weiteren Ebenen angeordneten Bohrungen zu verwenden oder aber eine weitere derart ausgebildete Benetzungsdüse an die erste anzuschließen. Dabei wird die zweite Benetzungsdüse zweckmäßigerweise versetzt zur ersten angeordnet, so daß die entsprechenden Bohrungen der zweiten Düse auch versetzt zu der ersten Düse bzw. den dortigen Bohrungen ihren Wasserstrahl aussenden. Die jeweils vier einer Benetzungsdüse zugeordneten Bohrungen sind jeweils in entgegengesetzte Richtung austragend je Ebene angeordnet. Das bedeutet, daß beispielsweise die erste in Förderrichtung angeordnete Düsenkombination so austrägt, daß sich die beiden Wasserstrahlen im Düsenhöchsten treffen, während die zweite Bohrungsgruppe so angeordnet ist, daß sich die Wasserstrahlen im Düsentiefsten treffen und von dort aus ihre Wassertröpfchen in Richtung des Fördergutes und in dieses hineinkatapultieren.Adequate mixing and wetting success is achieved when four holes are arranged in two planes one behind the other. In the event that the wetting achieved in this way is insufficient, it is either possible to use wetting nozzles with further bores arranged in further planes or to connect another wetting nozzle designed in this way to the first. The second wetting nozzle is expediently arranged offset from the first so that the corresponding bores of the second nozzle also emit their water jet offset from the first nozzle or the bores there. The four bores assigned to a wetting nozzle are each arranged in the opposite direction to discharge each level. This means that, for example, the first nozzle combination arranged in the conveying direction discharges in such a way that the two water jets meet in the nozzle top, while the second group of holes is arranged in such a way that the water jets meet in the nozzle deepest and from there their water droplets in the direction of the conveyed material and in catapult this into it.

Als zweckmäßig hat es sich herausgestellt, die Bohrungen in vorzugsweise einem ein Viertel der Gesamtlänge der Düse aufweisenden Abstand anzuordnen. Bei einem derartigen Abstand der Bohrungen ist eine gleichmäßige und intensive Verteilung der aufeinandertreffenden Wasserstrahlen und der Wassertröpfchen gegeben. Bei einer üblichen Düse bedeutet dies, daß die Bohrungen der beiden Ebenen etwa einen Abstand von 3 bis 4 cm aufweisen.It has proven to be expedient to have the bores at a distance preferably having a quarter of the total length of the nozzle assign. With such a spacing of the bores there is a uniform and intensive distribution of the water jets and the water droplets that meet. In the case of a conventional nozzle, this means that the bores of the two planes are approximately 3 to 4 cm apart.

Eine zweckmäßige Ausbildung der Erfindung sieht vor, daß das Rohr zwei Wasseranschlüsse in Form von Stecko DN-2o-Anschlüssen aufweist, die versetzt zu den Bohrungen in den Ringraum mündend angeordnet sind. Die versetzte Anordnung der Wasseranschlüsse zu den Bohrungen sichert eine gleichmäßige Versorgung der Bohrungen mit Wasser, wobei zwei Wasseranschlüsse diese Versorgung optimieren. In der Regel reicht aber ein derartiger Wasseranschluß aus, wobei der zweite in der Regel verschlossen ist. Hierzu sieht die Erfindung vor, daß der jeweils untere Wasseranschluß über einen Stopfen verschließbar ist. Der untere Wasseranschluß dient nach Beendigung des Blasvorganges dazu, die gesamte Düse zu spülen und zu entleeren. So ist eine lange Standzeit derartiger Benetzungsdüsen gesichert.An expedient embodiment of the invention provides that the tube has two water connections in the form of Stecko DN-20 connections, which are offset from the holes in the annular space. The staggered arrangement of the water connections to the holes ensures an even supply of water to the holes, whereby two water connections optimize this supply. As a rule, however, such a water connection is sufficient, the second being usually closed. For this purpose, the invention provides that the lower water connection can be closed by a plug. The lower water connection serves to flush and empty the entire nozzle after the blowing process. This ensures a long service life for such wetting nozzles.

Eine zweckmäßige und einfache Ausbildung des Doppelrohres ist die, bei der das Außenrohr auf das die Flansche aufweisende Innenrohr aufgesetzt ist. Dadurch wird zwischen den beiden Rohren der Ringraum ausschließlich in der Breite gebildet, wie er für die im Abstand anzuordnenden Bohrungen notwendig ist. Dabei sind entweder die Enden des Außenrohres abgekantet oder aber der notwendige Ringraum ist aus der Wandung des Außenrohres ausgenommen, so daß sich die notwendige Abdichtung am Ende des Außenrohres gegenüber dem Innenrohr einfach herstellen läßt.A practical and simple design of the double tube is that in which the outer tube is placed on the inner tube having the flanges. As a result, the annular space between the two tubes is formed exclusively in the width that is necessary for the bores to be arranged at a distance. Either the ends of the outer tube are chamfered or the necessary annular space is excluded from the wall of the outer tube, so that the necessary seal at the end of the outer tube can be easily produced from the inner tube.

Die Erfindung zeichnet sich insbesondere dadurch aus, daß eine zahlreiche Vorteile aufweisende Benetzungsdüse geschaffen ist, die insbesondere zu einer wesentlich verringerten Staubbelastung führt, weil der Dammbaustoff intensiv durchmischt wird und mehrere solcher Durchmischungszonen vorzugsweise zwei durchfliegt, bevor er die Benetzungsdüse wieder verläßt. Das Wasser tritt mit hoher Geschwindigkeit in die Benetzungsdüse ein, bestreicht nach Verlassen der Bohrung zunächst etwa ein Viertel des Umfangs und trifft im Düsenhöchsten oder -tiefsten den ihm entgegengerichteten Wasserstrahl der zugeordneten Bohrung. Durch den Zusammenprall sprüht das Wasser düsenförmig in die Mitte des Förderraums, wodurch die Intensivdurchmischung eintritt. Vorteilhaft sind außerdem die geringen Abmessungen derartiger Benetzungsdüsen und die Möglichkeit, sie schnell und intensiv zu reinigen, wenn der jeweilige Fördervorgang abgeschlossen ist. Da durch den Ringraum eine gleichmäßige Versorgung der Bohrungen mit Wasser erreicht ist, ist auch gesichert, daß die beiden entgegengerichteten Wasserstrahlen sich am vorgesehenen Punkt und mit der gleichen Intensität treffen, so daß die gleichmäßige Aufteilung der beiden Wasserstrahlen für die intensive Benetzung sorgen kann.The invention is characterized in particular by the fact that a wetting nozzle having numerous advantages is created, which in particular leads to a significantly reduced dust load, because the dam building material is mixed thoroughly and flies through several such mixing zones, preferably two, before it leaves the wetting nozzle again. The water enters the wetting nozzle at high speed, initially covers about a quarter of the circumference after leaving the bore and hits the jet of water of the assigned bore at the highest or lowest point of the nozzle. As a result of the collision, the water sprays in a nozzle shape into the center of the delivery chamber, causing intensive mixing. The small dimensions of such wetting nozzles and the possibility of cleaning them quickly and intensively when the respective conveying process is completed are also advantageous. Since a uniform supply of water to the holes is achieved through the annular space, it is also ensured that the two opposing water jets meet at the intended point and with the same intensity, so that the uniform distribution of the two water jets can ensure intensive wetting.

Weitere Einzelheiten und Vorteile des Erfindungsgegenstandes ergeben sich aus der nachfolgenden Beschreibung der zugehörigen Zeichnung, in der ein bevorzugtes Ausführungsbeispiel mit den dazu notwendigen Einzelheiten und Einzelteilen dargestellt ist. Es zeigen:

  • Fig. I eine Gesamtseitenansicht der Benetzungsdüse
  • Fig. 2 einen Längsschnitt durch die Benetzungsdüse
  • Fig. 3 einen Querschnitt im Bereich der ersten Düsenanordnung und
  • Fig. 4 einen Querschnitt im Bereich der zweiten Düsenänordnung.
Further details and advantages of the subject matter of the invention emerge from the following description of the accompanying drawing, in which a preferred exemplary embodiment is shown with the details and individual parts required for this. Show it:
  • Fig. I is an overall side view of the wetting nozzle
  • Fig. 2 shows a longitudinal section through the wetting nozzle
  • 3 shows a cross section in the region of the first nozzle arrangement and
  • Fig. 4 shows a cross section in the region of the second nozzle arrangement.

Die in Fig. I wiedergegebene Düse (I) besteht aus einem Rohr (2), das an beiden Enden Flansche (3, 4) hat, über die eine Verbindung mit der Dammbaustoffversorgungsleitung schnell und ohne großen Aufwand herstellbar ist. Über einen Wasseranschluß (5), der in das Außenrohr (6) einmündet, werden die hier im einzelnen nicht sichtbaren Düsen bzw. Bohrungen gleichmäßig mit Wasser versorgt.The nozzle (I) shown in Fig. I consists of a tube (2), which has flanges (3, 4) at both ends, via which a connection to the dam building material supply line can be produced quickly and without great effort. Via a water connection (5) which opens into the outer tube (6), the nozzles or bores, which are not visible here in detail, are evenly supplied with water.

Aus Fig. ist zu entnehmen, daß das Außenrohr (6) auf das die Flansche (3, 4) aufweisende Innenrohr (7) aufgesetzt ist, wobei zwischen beiden der aus Fig. 2 ersichtliche Ringraum (11) gebildet wird. In der Wandung (8) sind Bohrungen (9, lo) vorgesehen, über die das unter hohem Druck in den Ringraum geleitete Wasser mit hoher Geschwindigkeit austritt.It can be seen from Fig. That the outer tube (6) is placed on the inner tube (7) having the flanges (3, 4), the annular space (11) shown in Fig. 2 being formed between the two. Bores (9, lo) are provided in the wall (8), through which the water conducted into the annular space under high pressure emerges at high speed.

Das düsenförmige Ende der Bohrungen (9, lo) ist in Fig. 2 angedeutet, wobei die Fig. 3 und 4 den gesamten düsenförmigen Verlauf der Bohrungen (9, lo bzw. 15, 16) wiedergibt. Die jeweils eine Gruppe bildenden Bohrungen (9, 15 und lo, 16) sind jeweils einen Abstand aufweisenden Ebenen zugeordnet, wodurch eine entsprechend intensive Benetzung des Fördergutes, das den Förderraum (12) in Förderrichtung (13) durchströmt, gesichert ist.The nozzle-shaped end of the bores (9, lo) is indicated in Fig. 2, with Figs. 3 and 4 showing the entire nozzle-shaped course of the bores (9, lo and 15, 16). The bores (9, 15 and 10, 16) forming a group are each assigned spaced planes, which ensures a correspondingly intensive wetting of the conveyed material which flows through the conveying space (12) in the conveying direction (13).

Am unteren Umfang des Außenrohres (6) ist ein weiterer Wasseranschluß (14) vorgesehen, der in der Regel aber nicht zur Zufuhr des Wassers benötigt wird, sondern vielmehr für Spül- und Reinigungsvorgänge vorgesehen ist und in der Regel durch einen Stopfen verschlossen ist.A further water connection (14) is provided on the lower circumference of the outer tube (6), but is generally not required for supplying the water, but rather is provided for rinsing and cleaning processes and is usually closed by a stopper.

Die die Düsen (9, 15) in Richtung Wasseranschluß (5) verlassenden Wasserstrahlen treffen etwa in Höhe des Wasseranschlusses aber in Förderrichtung (13) versetzt dazu aufeinander, wobei das Wasser durch den Zusammenprall düsenförmig auseinanderspritzt. Das gleiche gilt für die die Düsen (lo, 16) in Richtung Wasseranschluß (14) verlassenden Wasserstrahlen, die hier im Düsentiefsten aufeinandertreffen und auseinandergedrückt werden. Durch beide Wasserstrahlen bildet sich ein insgesamt wirksamer Wasserfilm auf der Rohrwandung, der sich zusätzlich positiv bemerkbar macht. Der Wasserfilm legt sich um das Fördergut und führt so zu einer weiteren Verringerung der Staubbelastung.The water jets leaving the nozzles (9, 15) in the direction of the water connection (5) meet approximately at the level of the water connection but offset in the conveying direction (13), the water spraying apart in a nozzle shape due to the collision. The same applies to the water jets leaving the nozzles (10, 16) in the direction of the water connection (14), which meet here at the bottom of the nozzle and are pressed apart. Both water jets form an overall effective water film on the pipe wall, which also has a positive effect. The water film wraps itself around the material to be conveyed, thus further reducing dust pollution.

Claims (10)

1. Dampening nozzle for barrier forming materials in underground mining and tunnelling, which is incorporated into the barrier forming material supply conduit and provided with a water connection, having a tube flange on both ends and having tangentially arranged, nozzle-shaped bores for the dampening water, characterised in that the tube (2) is formed to have an annular space (11) and that the bores (9, 10, 15, 16) opening into the inner tube (7) tangentially cut at right angles to the flow direction (13) connect the annular space with the flow space (12) and are arranged in several planes along the flow direction, in which the bores in each plane are arranged on the periphery of the inner tube displaced by 180° from each other and that each plane is arranged rotationally displaced from the neighboring plane.
2. Dampening nozzle according to claim 1, characterised in that the tube (2) is formed as a double tube having an outer and an inner tube (6, 7).
3. Dampening nozzle according to claim 1 and claim 2, characterised in that the bores (9, 10, 15, 16) are formed and arranged midway up the wall (8) of the inner tube (7).
4. Dampening nozzle according to claim 1, characterised in that the bores (9, 10, 15, 16) are so formed that the water comes out at an opening angle of preferably 60°.
5. Dampening nozzle according to claim 1, characterised in that four bores (9, 10, 15, 16) are arranged in two planes one after the other.
6. Dampening nozzle according to claim 1 and claim 5, characterised in that the bores (9, 10, 15, 16) of the two planes are arranged to deliver in opposite directions.
7. Dampening nozzle according to claim 1 and claim 5, characterised in that the bores, (9, 10, 15, 16) are arranged spaced from one another preferably by a quarter of the total length of the nozzle (1).
8. Dampening nozzle according to claim 1, characterised in that the tube (29) has two water connections (5, 14) in the form of Stecko DN 20 connectors which are arranged to open into the annular space (11) displaced with regard to the bores (9, 10, 15, 16).
9. Dampening nozzle according to claim 8, characterised in that the lower water connection (14) is closable by a stopper.
10. Dampening nozzle according to claim 2, characterised in that the outer tube (6) is mounted on the inner tube (7) having the flanges (3, 4).
EP87106620A 1986-05-13 1987-05-07 Double tangential nozzle Expired EP0245778B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87106620T ATE45205T1 (en) 1986-05-13 1987-05-07 DOUBLE TANGENTIAL NOZZLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616082 1986-05-13
DE19863616082 DE3616082A1 (en) 1986-05-13 1986-05-13 DOUBLE TANGENTIAL NOZZLE

Publications (2)

Publication Number Publication Date
EP0245778A1 EP0245778A1 (en) 1987-11-19
EP0245778B1 true EP0245778B1 (en) 1989-08-02

Family

ID=6300725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106620A Expired EP0245778B1 (en) 1986-05-13 1987-05-07 Double tangential nozzle

Country Status (4)

Country Link
EP (1) EP0245778B1 (en)
AT (1) ATE45205T1 (en)
DE (2) DE3616082A1 (en)
ES (1) ES2010688B3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815425A1 (en) * 1988-05-06 1989-11-16 Deutsche Forsch Luft Raumfahrt Method for the determination of the tensile strength of thin single fibres
CN103963162B (en) * 2014-05-23 2016-06-29 山东华联矿业股份有限公司 Vertical sand warehouse pulp making device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE460796C (en) * 1928-06-05 Adolf Wolfsholz Method for spraying mortar or the like.
FR2302789A1 (en) * 1975-03-06 1976-10-01 Campenon Bernard Sa Additive injector for concrete pump - has liquid accelerator mixed with compressed air and fed through sloping channels around jet
CH583838A5 (en) * 1975-04-07 1977-01-14 Heller Walter J Ag Bauunterneh Concrete spraying gun with supply connection - has wear resistant plastics nozzle connected to water and cement supply
US4095748A (en) * 1975-07-04 1978-06-20 Kanebo, Ltd. Apparatus for mixing a cement slurry with a glass fiber
US4415275A (en) * 1981-12-21 1983-11-15 Dietrich David E Swirl mixing device
DE3100571A1 (en) * 1981-01-10 1982-08-12 Bayer Ag, 5090 Leverkusen METHOD FOR PRODUCING ELASTIC CONCRETE OR MORTAR
DE8315702U1 (en) * 1983-05-28 1984-01-19 Sterzel, Erich, 4270 Dorsten DRAIN CHANNEL

Also Published As

Publication number Publication date
DE3760395D1 (en) 1989-09-07
DE3616082C2 (en) 1988-03-10
ATE45205T1 (en) 1989-08-15
EP0245778A1 (en) 1987-11-19
DE3616082A1 (en) 1987-11-19
ES2010688B3 (en) 1989-12-01

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